Source: https://patents.google.com/patent/DE102014112954A1/en
Timestamp: 2020-07-08 15:49:03+00:00
Document Index: 7234846

Matched Legal Cases: ['art 27', 'art 27', 'art 29', 'arts 27', 'arts 27', 'art 27', 'art 29', 'art 27', 'art 35', 'art 35', 'art 37', 'arts 35', 'art 35', 'art 37', 'art 35', 'art 37', 'art 37', 'art 29', 'art 35', 'art 29', 'art 35', 'art 37']

DE102014112954A1 - Housing device of a jet engine - Google Patents
DE102014112954A1
DE102014112954A1 DE102014112954.7A DE102014112954A DE102014112954A1 DE 102014112954 A1 DE102014112954 A1 DE 102014112954A1 DE 102014112954 A DE102014112954 A DE 102014112954A DE 102014112954 A1 DE102014112954 A1 DE 102014112954A1
DE102014112954.7A
Igor SOLA-PARDO
2014-09-09 Application filed by Rolls Royce Deutschland Ltd and Co KG filed Critical Rolls Royce Deutschland Ltd and Co KG
2014-09-09 Priority to DE102014112954.7A priority Critical patent/DE102014112954A1/en
2016-03-10 Publication of DE102014112954A1 publication Critical patent/DE102014112954A1/en
RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound 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[Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound 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[Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
A housing device (15) of a jet engine with a radially inner housing device (21) and a radially outer housing device (23) is proposed. The inner housing device (21) is designed with a radially inner annular housing part (27) and a radially outer annular housing part (29). The inner housing device (21) has a plurality of blades (31) extending essentially in the radial direction (R) between the inner housing part (27) and the outer housing part (29). The radially outer housing device (23) is designed with a radially inner annular housing part (35) and a radially outer annular housing part (37). The outer housing device (23) has a plurality of blades (39, 41) extending essentially in the radial direction (R) between the inner housing part (35) and the outer housing part (37). The inner housing device (21) is formed as a first one-piece cast component and the outer housing device (23) as a second one-piece cast component.
The invention relates to a housing device of a jet engine with a radially inner housing device and a radially outer housing device according to the closer defined in the preamble of claim 1. Art.
Jet engines known from practice have a plurality of separate housing parts, which are brought into operative connection with each other during assembly of the jet engine in the axial direction of the jet engine. Such housing parts are designed, for example, as an inlet housing, fan housing, intermediate housing, combustion housing or the like, which are arranged in the enumerated order from an upstream end region of the jet engine in the direction of a downstream end portion of the jet engine.
The intermediate housing is designed with four annular, substantially concentric housing parts, wherein between two radially inner housing parts substantially in the radial direction of structure blades are arranged and at least partially a core flow channel of the jet engine is limited by these housing parts. Arranged in the radial direction between the two outer annular housing parts are aerodynamic vanes, these housing parts delimiting a bypass duct of the jet engine. From mutually facing surfaces of the two middle housing parts in the radial direction, a so-called Torsionsbox is formed.
In known jet engines, the intermediate housing is designed as a one-piece cast component. Such a one-piece design of the intermediate housing is disadvantageously difficult and expensive to manufacture, since cavities to be provided, for example in the region of a so-called Torsionsbox, are difficult to access in a region between the bypass channel and the core flow channel and are to be finished only with correspondingly complex cores to be executed. Due to occlusions may be present in such one-piece intermediate housings additionally areas that can not be designed to the desired extent. Furthermore, the intermediate housing in such a manufacture of a single material to manufacture, so that may have to be compromised with respect to the different material requirements in the individual housing areas under certain circumstances.
From practice, it is also known to assemble intermediate housing from a plurality of individual components, wherein, for example, the housing parts and the blades are each manufactured as individual parts. In such executed intermediate housings, however, the assembly is very complex.
It is an object of the present invention to provide a housing device of a jet engine, which is easy to manufacture and does not involve a complicated assembly.
According to the invention this object is achieved with a housing device having the features of claim 1.
It is a housing device of a jet engine with a radially inner housing means and a radially outer housing means proposed, wherein the inner housing means is designed with a radially inner annular housing part and a radially outer annular housing part, which in the installation position of the housing device at least partially define a core flow channel of the jet engine, and wherein the inner housing means comprises a plurality of substantially in the radial direction of the housing device between the inner housing part and the outer housing part extending blades, wherein the radially outer housing means is designed with a radially inner annular housing part and a radially outer annular housing part in the installed position of Housing device at least partially limit a bypass duct of the jet engine, and wherein the outer housing means a plurality comprises in the radial direction of the housing device between the inner housing part and the outer housing part extending blades.
According to the invention, the inner housing device is designed as a first one-piece cast component and the outer housing device as a second one-piece cast component.
The housing device according to the invention is compared to known one-piece cast housing devices advantageously easier and less weight to produce and still mount in a simple manner by only two-part design. The ease of manufacture of the housing device results in particular from the better accessibility of the two-part design in a connecting region of the two housing devices, so that compared to a one-piece design of the housing device simpler cores can be used for the casting and fixed. Overall, the reduced size also reduces the risk of unwanted spills compared to one-piece casting production.
As a result of the good accessibility of the connecting region of the housing devices compared to known one-part embodiments, the structure formed in the connection region, referred to as a torsion box, can be optimized with regard to its shape. In addition, it is not necessary, for example, for structural components to be passed through in order to achieve sufficient strength in the region of the torsion box through a core flow channel, the torsion box and a bypass channel. Furthermore, the individual housing devices of the housing device according to the invention are easier to rework than a one-piece housing device.
The housing device according to the invention also has the advantage that, compared to a one-piece cast version, different materials for the inner housing device and the outer housing device can be used and thus the optimum material combination for the tasks to be performed, which differ from each other for the inner and outer housing means can be chosen.
An assembly of a running with the housing device according to the invention jet engine is very easy to carry out, since the inner housing means can be provided as a basis for the assembly of other components and the outer housing means can be connected to the inner housing means only after the assembly of further elements at a later date , This ensures good accessibility of the inner housing means for the connection of the other elements of the jet engine to the inner housing means and the assembly of these elements is not hindered by the outer housing means. In addition, an optionally after operation of the jet engine replacement of the outer housing device also according to the invention divided execution of the housing device also correspondingly easy to carry out, since not the entire housing device must be removed.
The housing device according to the invention is particularly suitable for use in engines with a thrust in the order of up to 45,000 pounds.
In an advantageous embodiment of the housing device according to the invention, it is provided that the inner housing means is designed with a light metal material, in particular a magnesium material, a titanium material or an aluminum material. If a magnesium material is used, the inner housing device can be produced particularly inexpensively and is particularly easy to carry out. On the other hand, an inner housing device designed with a titanium material is more expensive to manufacture, but entails lower consequential costs. Regardless of the choice of material, the inner housing means preferably has attachment means for connecting an inner gear means, also referred to as Internal Gear Box, and for main bearings of the engine.
The outer housing device may be in an advantageous housing device according to the invention with a light metal material, in particular a magnesium material, an aluminum material or a titanium material, or with a composite material, such as fiber reinforced plastic executed, since lower in the region of the outer housing device compared to the inner housing means Operating temperatures are present.
If the inner housing device and the outer housing device are formed with the same or a similar material, they also have the same or similar coefficients of expansion. Then, an interaction of the inner and outer housing device in a connection region of the housing devices over the entire operating temperature range is unproblematic. If the housing devices consist of different materials, it is possible to select the material variants offering the greatest advantages for the respective housing device, taking into account the coefficients of expansion.
The inner housing device and the outer housing device are in particular connected to one another via a connecting device, wherein the inner housing device and the outer housing device each have a connecting device of the connecting device. The connecting device is designed, for example, as a flange device and shaped such that a circumferential ring, a so-called Torsionsbox is formed by the inner housing means and the outer housing means in the region of the connecting device, which has a closed profile, for example, with a substantially quadrangular cross-section. The circumferential ring is bounded by a radially outer surface of the inner housing means and radially inner surface of the outer housing means.
In order to be able to easily carry out an installation of the housing device, the connecting device of the inner housing device and the outer housing device each have a connection region located upstream in the installation position of the housing device and a connecting element Downstream connecting portion, wherein the upstream connection portion of the inner housing means has a relation to the downstream connection portion of the inner housing means smaller outside diameter and the upstream connection portion of the outer housing means a relation to the downstream connection portion of the outer housing means smaller inner diameter. In this way, the outer housing device can be pushed during assembly in a simple manner in the axial direction of the inner housing means and connected to this.
In an advantageous embodiment of the housing device according to the invention it is provided to achieve a simple fixing of the housing means to each other and to enable easy replacement of the outer housing means that the inner housing means and the outer housing means via a releasable connection, in particular a screw or the like, are interconnected , For this purpose, for example, in the area of the flange devices circumferentially distributed attachment points can be provided for screws.
Alternatively or additionally, the inner housing device and the outer housing device can also be connected to one another via at least one welded connection, wherein a welded connection is particularly easy to produce if the inner housing device and the outer housing device consist of identical or similar materials.
The outer housing part of the inner housing device and / or the inner housing part of the outer housing device has, in an advantageous embodiment of the housing device according to the invention, at least one stiffening element. As a result, a desired high rigidity in the region of the circumferential ring or the Torsionsbox can be achieved in a simple manner. The at least one stiffening element may in particular be arranged on surfaces of the inner housing device facing in the radial direction and / or of the outer housing device and is preferably cast on the respective housing device. This is particularly easy due to the split design of the housing device, since the respective areas of the housing devices are easily accessible during manufacture. The stiffening element can be designed, for example, as a strut or a rib, in particular as a so-called grid rib pattern, and / or in the form of a honeycomb or a triangle.
In an advantageous embodiment of the housing device according to the invention, the outer housing device has at least one attachment device for coupling the jet engine to an aircraft. The housing device is in particular part of a so-called case-mounted engine, d. H. a jet engine, which is connected via the an intermediate housing performing housing device on an aircraft. In engines of this type, a large part of the forces occurring in the core region of the jet engine are discharged through the intermediate housing, for example, to a structure of an aircraft, via a carrier strut which can be brought into operative connection with the outer housing part of the outer housing device. In addition to this, the outer housing device can also have attachment points for connecting an auxiliary device transmission device.
If the outer housing device in each case has a plurality of blades extending substantially in the radial direction of the housing device between the inner housing part and the outer housing part, wherein almost all the blades are of essentially identical design, a housing device which is advantageous from an aerodynamic and strength point of view is provided. The blades are preferably uniformly distributed in the circumferential direction of the housing device, d. H. a distance between two respective adjacent blades is at least approximately constant, with preferably about 20 blades being provided. In principle, however, depending on the application, a different number of blades can be used. The blades can be executed in such a way that aerodynamic blades, known as Fan Outlet Guide Vanes, can be dispensed with compared to known jet engines on the upstream side of the intermediate housing in the region of the bypass duct.
Alternatively, it can also be provided that the outer housing device in each case has a plurality of structural vanes extending substantially in the radial direction of the housing device between the inner housing part and the outer housing part and a plurality of aerodynamic vanes, the structural vanes having a greater length in the axial direction of the housing device have the aerodynamic blades. Due to the differently designed aerodynamic blades and structural blades, the housing device can be made particularly flexible with respect to the desired aerodynamic and structural properties. The distribution of the aerodynamic blades and structural blades can be chosen arbitrarily, with each considered in the circumferential direction of the housing device preferably more aerodynamic blades with a plurality of structural blades alternate. Also in this embodiment can advantageously on the upstream of the intermediate housing in the region of the bypass channel arranged aerodynamic blades, so-called Fan Outlet Guide Vanes, are dispensed with.
In a particularly advantageous embodiment of the housing device according to the invention lie in installation position of the housing device both upstream ends of the aerodynamic blades and upstream ends of the structural blades in a direction perpendicular to a central axis of the housing device cross-sectional plane. A jet engine designed with such a housing device is aerodynamically optimized in a cross-sectional plane in comparison to a known jet engine with aerodynamic blades and structural blades. Due to the fact that the upstream ends of both the aerodynamic vanes and the structural vanes contact but do not penetrate a cross-sectional plane, a spacing of all vanes from the fan blades in the axial direction of the housing device is the same, so that an excitation of the fan by the vanes during operation the jet engine is advantageously avoided.
To achieve the advantages described, upstream leading edges of the aerodynamic vanes and the structural vanes are made identical, with the leading edges of both the aerodynamic vanes and the structural vanes being rectilinear, and preferably contacting the cross-sectional plane over their entire radial extent. Alternatively, the leading edges of the aerodynamic vanes and the structural vanes may also be preferably contoured and have radially extending varying axial extents, with all upstream ends of the respective leading edge of the vanes, i. H. the most axially upstream ends of the respective blades contact the cross-sectional plane.
Even if an upstream end region of the structural vanes is configured identically to an upstream first third of the aerodynamic vanes formed in the axial direction the aerodynamic optimization is achieved by the proposed configuration of the upstream end regions of the aerodynamic vanes and the structural vanes, as a result Excitation of the fan, which may occur in divergent design of the upstream end portions of the aerodynamic blades and the structural blades, is safely avoided.
The identically designed and upstream end portions of the structural blades extend in an advantageous embodiment of the housing device according to the invention over the entire axial length of the shortest formed aerodynamic blade. In principle, it can also be provided that the structurally identical end region of the structural blades and of the aerodynamic blades has an intermediate value between one third and the complete length of the aerodynamic blade, for example one half, two thirds or three quarters.
In order to achieve the lowest possible total weight of the housing device with desirable high strength values, it is advantageous if a length of the structural blades in the axial direction of the housing device is at least 11.5 times as long as the length of the aerodynamic blades in the axial direction of the housing device.
The larger the ratio of the length of the structural blades to the length of the aerodynamic vanes in the axial direction of the housing device, the better the housing device can be made with desirably high strength values. The structural blades can in this case be designed in the axial direction of the housing device at least twice as long as the aerodynamic blades, but for example also three times or four times as long. The actual selected length ratio can be selected for the particular application in consideration of a space available in the axial direction of the housing device space.
It has proven to be particularly advantageous if a ratio of the length of the structural blades to the length of the aerodynamic blades in the axial direction of the housing device is particularly large. The structural blades may in this case be designed in the axial direction of the housing device preferably twice as long as the aerodynamic blades, but for example also three times or four times as long. The actual selected length ratio can be selected for the particular application in consideration of strength requirements with an available in the axial direction of the housing device space.
Further advantages and advantageous embodiments of the housing device according to the invention will become apparent from the claims and the embodiments described in principle below with reference to the drawings, wherein the same reference numerals are used in the description of the various embodiments in favor of clarity for construction and functionally identical components.
1 a schematic longitudinal sectional view of an upstream region of a jet engine with a plurality of axially adjacent housing elements, wherein a designated as an intermediate housing housing device is visible;
2 a simplified front view of the intermediate housing of the jet engine of 1 in isolation;
3 a simplified perspective view of the intermediate housing of the jet engine of 1 and 2 wherein the intermediate housing is shown partially cut away;
4 a simplified side view of the intermediate housing of the jet engine of 1 to 3 wherein the intermediate housing is shown partially cut away;
5 a simplified sectional view of the intermediate housing of the jet engine of 1 to 4 along a longitudinal center plane of the intermediate housing; and
6 a schematic exploded view of the intermediate housing of the jet engine of 1 to 5 in a side sectional view, wherein an inner housing means and an outer housing means are more apparent.
1 shows a section of a jet engine or aircraft engine in a longitudinal sectional view 1 which provides thrust of up to 45,000 pounds. The jet engine 1 has an inlet area 3 on, at the downstream of a blower 5 followed in a conventional manner. Again downstream of the fan 5 shares a fluid flow in the jet engine 1 in a side stream and a core stream, wherein the side stream through a bypass channel 7 flows and the core stream through a core flow channel 9 is guided into an engine core. The engine core is designed in a manner not shown with a compressor device, a burner and a turbine device.
The jet engine 1 comprises several, in the axial direction A of the jet engine 1 adjacent and interconnected housing elements. The upstream inlet area 3 is here by an inlet housing 11 formed at the downstream of a in the assembled state of the jet engine 1 the fan 5 enclosing fan case 13 followed. Again downstream of the fan case 13 closes a designed as an intermediate housing housing device 15 on, at the downstream of a sheath current housing 17 is connected.
In an alternative embodiment of the invention, the jet engine may be constructed differently in terms of the number and arrangement of the housing elements. For example, fewer or more housing elements than described above may be provided in the axial direction of the jet engine. In addition, it is also possible to implement individual housing elements described above in the axial and / or radial direction of the jet engine also in several parts.
The jet engine 1 is over the intermediate housing 15 attachable to an aircraft, so that during operation of the jet engine 1 occurring loads via the intermediate housing 15 to an unspecified apparent, with the intermediate housing 15 operable support beam of the jet engine 1 guided and derived to a structure of the aircraft. Such a jet engine 1 is also referred to as a case-mounted engine.
The following is the intermediate housing 15 of the jet engine 1 described in more detail, extending from a central axis 19 of the jet engine 1 or the intermediate housing 15 in the radial direction R of the jet engine 1 extends to the outside and from the radial direction R at least a portion of the core flow channel 9 as well as the bypass channel 7 is limited.
The intermediate housing 15 consists of two each executed as a one-piece cast component housing devices 21 . 23 involved in the assembly of the jet engine 1 via a connection device described in more detail below 25 be connected to each other. The radially inner housing device 21 has an inner annular housing part 27 and an inner annular housing part 27 in the radial direction R comprehensive outer annular housing part 29 on. From each other assigning surfaces of the two housing parts 27 . 29 becomes part of the core flow channel 9 each limited in the radial direction R, wherein the housing parts 27 . 29 in the illustrated embodiment over ten in the following figures closer apparent blades 31 connected to each other. The circumferentially particularly uniformly distributed blades 31 , also referred to as struts, are aerodynamically shaped in an upstream end region, and in particular serve to transfer loads from the core region of the jet engine 1 radially outward. For performing service lines of the inner housing part 27 to the outer housing part 29 and / or for weight reduction, it is possible that one, several or all of the blades 31 are executed hollow. It can also be provided that the inner housing part 27 a connection device for connecting an inner transmission device, a so-called Internal Gear Box, has.
Next to the shovels 31 the inner housing device 21 of the intermediate housing 15 are in 1 upstream of this in the region of the core flow channel 9 more shovels 33 provided, which are also distributed circumferentially. The other shovels 33 are present part of an upstream of the intermediate housing 15 arranged and connected to this vane housing 14 ,
The inner housing device 21 radially surrounding outer housing means 23 has like the inner housing means 21 an inner annular housing part 35 and one the inner housing part 35 in the radial direction R comprehensive outer housing part 37 on, wherein mutually facing surfaces of the housing parts 35 . 37 a part of the bypass channel 7 is limited in the radial direction R. The inner housing part 35 and the outer housing part 37 are in turn in the 2 to 6 blades which are closer to one another, wherein in the present case differently designed blades, namely on the one hand structural blades 39 and on the other hand aerodynamic blades 41 , are provided. Both the structural blades 39 as well as the aerodynamic blades 41 each perform aerodynamic and structural tasks and are compatible with both the inner housing part 35 as well as with the outer housing part 37 firmly connected, so that a stable connection is created and large forces can be transmitted.
As an alternative to the embodiment shown, it can also be provided that all the blades connecting the inner housing part to the outer housing part are of essentially identical construction.
For transmission during operation in the core area of the jet engine 1 occurring forces and loads radially outward in the region of the bypass channel 7 are only in a cross-sectional area of the intermediate housing 15 arranged blades 39 . 41 required. Compared to known embodiments, in which only aerodynamic blades are arranged in a cross-sectional plane in the region of the bypass duct and structural vanes are arranged in a cross-sectional plane downstream thereof, the embodiment shown integrates structural blades 39 and aerodynamic blades 41 in a single cross-sectional area of the jet engine 1 , This is the jet engine 1 In the axial direction A very short executable and it can be compared to the version with offset in the axial direction A of the jet engine mutually arranged blades optionally one, the other blades comprehensive large component can be saved.
The jet engine 1 is about one with the outer housing part 37 the outer housing device 23 integrally connected attachment device 42 attachable to an aircraft. In addition to the connection device 42 can the outer housing device 23 Also have connection points for connecting an auxiliary equipment transmission device.
In 2 to 6 is the intermediate housing 15 each shown in isolation, the two-piece construction of the intermediate housing 15 in contrast to the illustration shown in simplified form in this section 1 with the inner housing device 21 and the outer housing device 23 can be seen in more detail.
Due to the split version of the intermediate housing 15 with the inner housing device designed as a one-piece cast component 21 and the outer housing device also embodied as a one-piece cast component 23 can the housing devices 21 . 23 by the less complex shape compared to a one-piece intermediate housing, in particular in a connecting region of the housing devices 21 . 23 but also by the smaller and more easily accessible design of the housing devices 21 . 23 easier to produce in a casting process. In addition, in principle for the inner housing device 21 and the outer housing device 23 In each case adapted to the conditions to be met materials are used, including various materials for the inner housing device 21 and the outer housing means can be used. In the present case, both the inner housing device 21 as well as the outer housing means 23 executed with a titanium material.
For connection of the inner housing device 21 with the outer housing device 23 have the inner housing means 21 and the outer housing device 23 in each case a connecting device designed as a flange device 43 respectively. 45 the connection device 25 each comprising an upstream connection region and a downstream connection region. An upstream connection area 47 the inner housing device 21 has a relation to the downstream connection area 49 the inner housing device 21 smaller outer diameter. In contrast, there is an upstream connection area 51 the outer housing device 23 with a relation to a downstream connection area 53 the outer housing device 23 smaller internal diameter. This allows the outer housing device 23 during assembly of the jet engine 1 in a simple manner in the axial direction A of the jet engine 1 from an installation position of the inner housing device 21 upstream side on the inner housing device 21 postponed and tied to these.
For connection of the inner housing device 21 with the outer housing device 23 In the present case, fastening points distributed circumferentially are located both in the area of the upstream connecting areas 47 . 51 as well as in the area of the downstream connection areas 49 . 53 provided over which the housing devices 21 . 23 in this case via a screw connection 55 can be fixed to each other. By providing such a detachable connection on the one hand, a mounting of the jet engine 1 and on the other hand an exchange of the outer housing device 23 For example, in case of damage in a simple manner, with an exchange of the outer housing device 23 unlike a one-piece designed intermediate housing not the entire jet engine 1 must be dismantled.
Alternatively or additionally, the inner housing device 21 and the outer housing device 23 also be connected to each other via a welded joint.
In the area of the connection device 25 of the intermediate housing 15 is from the outer housing part 29 the inner housing device 21 and the inner housing part 35 the outer housing device 23 a so-called torsion box 57 of the jet engine 1 educated. The torsion box 57 is designed with a closed profile, here has a substantially rectangular cross section and revolves around the central axis 19 of the jet engine 1 essentially annular. By dividing the intermediate housing 15 in the inner housing device 21 and the outer housing device 23 are the Torsionsbox in the assembled state 57 forming areas of the housing devices 21 . 23 in the manufacture of the respective housing device 21 . 23 easily accessible, so that both the outer housing part 29 the inner housing device 21 as well as the inner housing part 35 the outer housing device 23 can be performed in a simple manner with not more apparent stiffening elements, ribs, braces or the like, in the Torsionsbox 57 to achieve a desired high rigidity. The stiffening elements can easily in the manufacture of the respective housing device 21 . 23 be poured.
The following details the structure, the arrangement and the distribution of the structural blades 39 and the aerodynamic blades 41 the outer housing device 23 received in the present case are made of solid material with a substantially constant material thickness of, for example, about 3 mm.
For example in 4 it can be seen that all structural blades 39 are executed identical. Likewise, all aerodynamic blades 41 identical construction. Next goes out in particular 4 show that both upstream ends of the structure vanes 39 and upstream ends of the aerodynamic vanes 41 each preferably over its entire radial extent directly to a single cross-sectional plane 59 of the intermediate housing 15 borders or at the cross-sectional level 59 lie. Thus all structural blades touch 39 as well as all aerodynamic blades 41 the cross-sectional plane 59 but do not penetrate them. The shovels 39 . 41 all have in the axial direction A of the jet engine 1 viewed in the flow direction on a common starting position, whereby a distance between the leading edges of the blades 39 . 41 and the blades of the fan 5 during operation of the jet engine 1 is the same and the blades of the fan 5 through the structure blades 39 as well as the aerodynamic blades 41 not be excited in an undesirable way.
This effect can also be achieved in an alternative embodiment of the invention in that the aerodynamic blades and the structural blades are contoured in the region of their leading edges with radially different axial extensions, wherein a most axially in the axial direction extending end of the respective blades with the corresponding ends of the other blades in a cross-sectional plane. The leading edges of the blades are preferably designed and arranged identical.
Like also in 4 is apparent, are the structural blades 39 in the axial direction A present about twice as long as the aerodynamic blades 41 executed, with the structural blades 39 an axial length of presently about 200 mm and the aerodynamic blades have an axial length of about 100 mm here. By this measure losses are minimized and a favorable ratio of a total weight of the intermediate housing 15 and a desired small extension of the intermediate housing 15 in the axial direction A of the jet engine 1 reached.
In addition, it is provided that an upstream end region of the structural blades 39 identical to the entire design of the aerodynamic blades 41 in the axial direction A is executed. Such an executed intermediate housing 15 is in operation of the jet engine 1 advantageous under aerodynamic aspects.
In particular the 3 and 4 is still a distribution of structural blades 39 and the aerodynamic blades 41 in the circumferential direction U of the intermediate housing 15 to be taken, with structural blades 39 are preferably arranged at the locations where large loads are to be transferred. The structure blades 39 and the aerodynamic blades 41 can be arranged alternately to each other here. However, here are both of the structural blades 39 as well as from the aerodynamic blades 41 in each case several, for example, two, three, four or more similar blades 39 respectively. 41 arranged in the circumferential direction U next to each other.
Next to the structure blades 39 and the aerodynamic blades 41 can also have another hollow scoop 61 , a so-called King-Strut, be provided by the example, a radial shaft of a Hilfsgerätegetriebeeinrichtung or the like from a range of Torsionsbox 57 in the direction of the outer housing part 37 the outer housing device 23 are feasible.
In an advantageous embodiment of the invention, in addition to the distribution of structural blades shown 39 and aerodynamic blades 41 especially 40 aerodynamic blades and twelve structural blades including the King Struts may be provided, which may be distributed according to the present loads distributed over the circumference of the intermediate housing.
Core flow duct
guide vane housing
Housing means; intermediate housing
Turbofan housing
inner housing device
outer housing device
inner housing part of the inner housing device
outer housing part of the inner housing device
Blades of the inner housing device
inner housing part of the outer housing device
outer housing part of the outer housing device
structure shovel
aerodynamic shovel
Connecting means; flange
Connecting region of the inner housing device
Connection area of the outer housing device
Shovel; King Strut
axial direction of the housing device
radial direction of the housing device
Circumferential direction of the housing device
Housing device ( 15 ) of a jet engine ( 1 ) with a radially inner housing device ( 21 ) and a radially outer housing device ( 23 ), wherein the inner housing device ( 21 ) with a radially inner annular housing part ( 27 ) and a radially outer annular housing part ( 29 ) is executed in the installed position of the housing device ( 15 ) at least partially a core flow channel ( 9 ) of the jet engine ( 1 ), and wherein the inner housing device ( 21 ) several substantially in the radial direction (R) of the housing device ( 15 ) between the inner housing part ( 27 ) and the outer housing part ( 29 ) extending blades ( 31 ), wherein the radially outer housing device ( 23 ) with a radially inner annular housing part ( 35 ) and a radially outer annular housing part ( 37 ) is executed in the installed position of the housing device ( 15 ) at least partially a bypass channel ( 7 ) of the jet engine ( 1 ), and wherein the outer housing device ( 23 ) several substantially in the radial direction (R) of the housing device ( 15 ) between the inner housing part ( 35 ) and the outer housing part ( 37 ) extending blades ( 39 . 41 ), characterized in that the inner housing means ( 21 ) as a first one-piece cast component and the outer one Housing device ( 23 ) is formed as a second one-piece cast component.
Housing device according to claim 1, characterized in that the inner housing device ( 21 ) is performed with a light metal material, in particular a magnesium material, a titanium material or an aluminum material.
Housing device according to one of claims 1 or 2, characterized in that the outer housing device ( 23 ) is made with a light metal material, in particular a magnesium material, an aluminum material or a titanium material, or with a composite material.
Housing device according to one of claims 1 to 3, characterized in that the inner housing device ( 21 ) and the outer housing device ( 23 ) via a connection device ( 25 ), wherein the inner housing means ( 21 ) and the outer housing device ( 23 ) in each case a connection device ( 43 . 45 ) of the connection device ( 25 ) exhibit.
Housing device according to claim 4, characterized in that the connecting devices ( 43 . 45 ) of the inner housing device ( 21 ) and the outer housing device ( 23 ) each one in installation position of the housing device ( 15 ) upstream connection area ( 47 . 51 ) and a downstream connection area ( 49 . 53 ), wherein the upstream connection region ( 47 ) of the inner housing device ( 21 ) one opposite the downstream connection region ( 49 ) of the inner housing device ( 21 ) has smaller outer diameter and the upstream connection region ( 51 ) of the outer housing device ( 23 ) one opposite the downstream connection region ( 53 ) of the outer housing device ( 23 ) has a smaller inner diameter.
Housing device according to one of claims 1 to 5, characterized in that the inner housing device ( 21 ) and the outer housing device ( 23 ) via a detachable connection, in particular a screw connection ( 55 ) are interconnected.
Housing device according to one of claims 1 to 6, characterized in that the inner housing device ( 21 ) and the outer housing device ( 23 ) are connected to each other via a welded joint.
Housing device according to one of claims 1 to 7, characterized in that the outer housing part ( 29 ) of the inner housing device ( 21 ) and / or the inner housing part ( 35 ) of the outer housing device ( 23 ) has at least one stiffening element.
Housing device according to one of claims 1 to 8, characterized in that the outer housing device ( 23 ) at least one connection device ( 42 ) for coupling the jet engine ( 1 ) to an aircraft.
Housing device according to one of claims 1 to 9, characterized in that the outer housing device ( 23 ) are each a plurality of substantially in the radial direction (R) of the housing device ( 15 ) between the inner housing part ( 35 ) and the outer housing part ( 37 ) has extending blades, with almost all blades are made substantially identical.
Housing device according to one of claims 1 to 9, characterized in that the outer housing device ( 23 ) are each a plurality of substantially in the radial direction (R) of the housing device ( 15 ) between the inner housing part ( 35 ) and the outer housing part ( 37 ) extending structural blades ( 39 ) and several aerodynamic blades ( 41 ), wherein the structural blades ( 39 ) in the axial direction (A) of the housing device ( 15 ) longer than the aerodynamic blades ( 41 ) exhibit.
Housing device according to one of claims 10 or 11, characterized in that in the installed position of the housing device ( 15 ) both upstream ends of the aerodynamic blades ( 41 ) as well as upstream ends of the structural blades ( 39 ) in a direction perpendicular to a central axis ( 19 ) of the housing device extending cross-sectional plane ( 59 ) lie.
Housing device according to one of claims 11 or 12, characterized in that an upstream end region of the structural blades ( 39 ) identical to an upstream first third of the axial direction (A) shortest formed aerodynamic blade ( 41 ) is executed.
Housing device according to one of claims 11 to 13, characterized in that upstream end portions of the structural blades ( 39 ) identical to an upstream end portion of the aerodynamic blade ( 41 ) which is formed in the axial direction (A) is the shortest, wherein the end portions of the structural blades ( 39 ) at least over a first third of the total axial length of the shortest aerodynamic blade ( 41 ).
Housing device according to one of claims 11 to 14, characterized in that a length of the structural blades ( 39 ) in the axial direction (A) of the housing device ( 15 ) at least 1.5 times, in particular twice as long as a length of the aerodynamic blades ( 41 ) in the axial direction (A) of the housing device ( 15 ).
DE102014112954.7A 2014-09-09 2014-09-09 Housing device of a jet engine Withdrawn DE102014112954A1 (en)
DE102014112954.7A DE102014112954A1 (en) 2014-09-09 2014-09-09 Housing device of a jet engine
EP15183174.0A EP2995776B1 (en) 2014-09-09 2015-08-31 Housing device of a jet engine
US14/847,596 US9988941B2 (en) 2014-09-09 2015-09-08 Shroud device of a jet engine
DE102014112954A1 true DE102014112954A1 (en) 2016-03-10
ID=54014657
DE102014112954.7A Withdrawn DE102014112954A1 (en) 2014-09-09 2014-09-09 Housing device of a jet engine
US (1) US9988941B2 (en)
EP (1) EP2995776B1 (en)
DE (1) DE102014112954A1 (en)
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2014-09-09 DE DE102014112954.7A patent/DE102014112954A1/en not_active Withdrawn
2015-08-31 EP EP15183174.0A patent/EP2995776B1/en active Active
2015-09-08 US US14/847,596 patent/US9988941B2/en active Active
US20160069216A1 (en) 2016-03-10
EP2995776A1 (en) 2016-03-16
EP2995776B1 (en) 2018-02-21
US9988941B2 (en) 2018-06-05
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