DEVICE FOR CLEANING AND MAINTAINING INTERIOR OF HUB IN WIND TURBINE NACELLE

The invention provides a device for cleaning and maintaining the interior of a hub in a wind turbine nacelle, belonging to the technical field of wind power equipment. The device comprises a handle component, a switching assembly, a combined cleaning assembly and a maintenance assembly. The switching assembly is connected in a switching shaft block through a switching shaft. A high-temperature steam cleaning mechanism and a negative-pressure contaminant suction mechanism are arranged in the cleaning assembly to remove oil contaminants in the hub in the wind turbine nacelle. The device has a high level of integration, is easy to operate, and can improve the operation stability of a wind turbine.

BACKGROUND OF THE INVENTION

1. Technical Field

The invention relates to the technical field of wind power equipment, in particular to a device for cleaning and maintaining the interior of a hub in a wind turbine nacelle.

2. Description of Related Art

The increasing energy scarcity and environmental pollution faced by humanity have led to a growing recognition of the importance of wind power generation. China has abundant wind energy resources, with great potential for utilization. Therefore, the development of wind power generation is progressing rapidly, and the demand for maintenance is becoming increasingly urgent. Proper cleaning and maintenance of a wind turbine generator system are crucial to prolonging the lifespan and ensuring the stable operation of wind power equipment. Moreover, if not cleaned in a timely and thorough manner, oil contaminants that no longer provide lubrication can not only affect the normal operation of the equipment but also cause environmental pollution if leaked. Additionally, oil leakage and contamination in the wind turbine generator system pose considerable safety risks, as they may corrode components or cause fire hazards.

Traditional cleaning devices for wind turbine nacelles often only clean the dust inside a hub of the nacelle. For example, the prior art (CN 211071134 U) discloses an internal dust cleaning device for production of a wind turbine nacelle cover, which comprises a fixed base and two fixed plates; opposite outer walls of the two fixed plates are fixedly connected to the same connecting shaft, and an outer wall of the connecting shaft is sleeved with a fixed sleeve; an outer wall of the fixed sleeve is sleeved with a wind chamber pipe, and each port of the wind chamber pipe is fixedly connected to a dust suction nozzle; one side of one fixed plate is provided with a supporting plate on the outer wall, and a top outer wall of the supporting plate is provided with a dust collection box; one side of the other fixed plate is provided with a pull rod on the outer wall, and a top outer wall of the dust collection box is provided with an air pump; an intake end of the air pump is connected to the inside of the wind chamber pipe through a pipeline; and by arranging the wind chamber pipe and connecting a dust suction nozzle to each intake end of the wind chamber pipe, dust in different positions within the nacelle can be cleaned.

However, in practical operation, this simple device can only clean the dust scattered on the surface inside the hub of the nacelle and cannot remove oil contaminants that have stronger adhesion. Manual spraying of oil removal agents is required for oil contaminant removal. Additionally, after oil contaminants are removed, manual lubrication and maintenance of relevant transmission components are needed, which is time-consuming, labor-intensive, and inefficient.

BRIEF SUMMARY OF THE INVENTION

A device for cleaning and maintaining the interior of a hub in a wind turbine nacelle comprises an integrated handgrip, and further comprises a handle component and a switching assembly, wherein the handle component comprises a switching inner cavity and a switching shaft block, and the switching assembly comprises a switching body, a switching shaft, a switching center gear, a switching drive gear, a switching drive motor, a steam chamber, a contaminant collection chamber and an oil filling chamber;the integrated handgrip in the handle component is a main structural body of the cleaning and maintenance device, the switching inner cavity runs through the integrated handgrip, the switching shaft block is arranged at a middle position of an outer side wall of a main front of the integrated handgrip, and the switching shaft is fixed at a middle position of an outer end face of the switching body in the switching assembly; the switching shaft is rotatably connected to the switching shaft block, and the switching body is located in the switching inner cavity; the switching center gear is fixedly inserted in a shaft end face of the switching shaft, and the switching drive gear meshes with one side of the switching center gear; the switching drive gear is connected with the switching drive motor by a shaft, and the switching drive motor is fixed on the outer side wall of the main front of the integrated handle;the switching body is divided into three chambers, namely the steam chamber, the contaminant collection chamber and the oil filling chamber, and the three chambers are completely isolated;the steam chamber and the contaminant collection chamber are provided with a combined cleaning assembly for high-temperature steam cleaning and negative-pressure contaminant suction; anda maintenance assembly for oiling maintenance is arranged in the oil filling chamber.

The handle component further comprises an operation port, a contaminant collection position and an operation handle, the operation port is formed at a front end of a main body of the integrated handgrip, a contaminant collection position is arranged at a middle position of an outer side wall of a main rear of the integrated handgrip, and front and rear surfaces of a rear end of the integrated handgrip are respectively provided with operation handles.

The switching assembly further comprises a steam outlet and a contaminant collection inlet, the steam outlet is formed at a position, communicating with the steam chamber, of a front end of an outer wall of the switching body, and the contaminant collection inlet is formed at a position, communicating with the contaminant collection chamber, of the front end of the outer wall of the switching body.

One end of a steam valve in the combined cleaning assembly for high-temperature steam cleaning and negative-pressure contaminant suction which is arranged in the steam chamber and the contaminant collection chamber is connected to a side, near the steam outlet, of an outer wall of a cavity of the switching body, the other end of the steam valve is connected with an atomizer, the other end of the atomizer is connected with a rapid heating pipe, the other end of the rapid heating pipe is connected with a water tank, and a water tank cover is installed at a top opening of the water tank; anda fan installation position is further arranged on the outer wall of the cavity of the switching body, the fan installation position is located behind the steam valve, a micro fan is inserted in the fan installation position, and an air inlet filter element is installed at an air inlet of the micro fan.

A steam cover is fixed on an outer end face of the steam chamber, and the steam cover is used for sealing the steam chamber; a contaminant collection cover is fixed on an outer end face of the contaminant collection chamber, and the contaminant collection cover is used for sealing the contaminant collection chamber; and a contaminant collection pump is connected to a main surface of the contaminant collection cover, and the other end of the contaminant collection pump is connected with a contaminant collection cylinder.

An oil filling pipe base in the maintenance assembly for oiling maintenance arranged in the oil filling chamber is arranged on a front end face of the oil filling chamber, an oil filling pipe is inserted into the oil filling pipe base, and a tail end of the oil filling pipe is connected to one side of a lower end of an oiler; a propulsion slide base is fixed to a bottom of the oiler, the propulsion slide base is connected in a propulsion screw in an adaptive manner, a front end of the propulsion screw is rotatably connected to a front screw base, a rear end of the propulsion screw is rotatably connected to a rear screw base, and the front screw base and the rear screw base are fixed on an inner wall of the oil filling chamber; an end shaft of the propulsion screw is connected with a screw motor, and the screw motor is fixed on the inner wall of the oil filling chamber;an oiler slide base is fixed on an outer wall of the oiler, an upper wall of an inner cavity of the oil filling chamber is provided with an oiler slide position, and the oiler slide base is slidably connected in the oiler slide position;a top of the oiler is provided with an oil filling cover, a middle position of a top of the oil filling cover is provided with an oil extrusion rack base, an oil extrusion rack is slidably connected in the oil extrusion rack base, a piston column is fixed at a lower end of the oil extrusion rack, and the piston column is located in an inner cavity of the oiler; andone side of the oil extrusion rack meshes with an oil extrusion gear, the oil extrusion gear is connected with an oil extrusion motor by a shaft, and the oil extrusion motor is fixed on the upper end face of the oil filling cover.

Further, two ends of a bottom surface of a main body of the switching body are respectively provided with auxiliary locking positions, and auxiliary ball positions corresponding to the auxiliary locking positions in position are arranged on the outer wall of the main front of the integrated handgrip; and an auxiliary ball locking position is fixed at a bottom end of the auxiliary ball position, a ball is slidably connected in the auxiliary ball position, a compression spring base is fixed at an upper end of the auxiliary ball position, and a compression spring is elastically connected between the ball and the compression spring base.

Further, a plurality of groups of gear locking positions are uniformly arranged on an outer main surface of the switching center gear centered on the switching shaft; a gear locking position base is fixed on the outer wall of the main front of the integrated handgrip, and a gear ball position is arranged on a side, near the switching center gear, of the gear locking position base; a gear ball locking position is fixed at a bottom end of the gear ball position, and the ball, the compression spring and the compression spring base are common parts; and another group of balls are slidably connected in the gear ball position, another group of compression spring bases are fixed at an upper end of the gear ball position, and another group of compression springs are elastically connected between another group of balls and the compression spring bases.

Further, an inner diameter of the auxiliary ball locking position is smaller than that of the auxiliary ball position, an inner diameter of the gear ball locking position is smaller than that of the gear ball position, a main body of the ball has the same dimension as the auxiliary ball locking position and the gear ball locking position, and a rear base of the ball has the same dimension as the auxiliary ball position and the gear ball position.

Further, a cleaning head is inserted in the operation port, a main body of the cleaning head is of an elastic telescopic structure which can be stretched back and forth and can also be bent up and down, left and right, a fixed end of the cleaning head communicates with both the steam outlet and the contaminant collection inlet, and a front end of the cleaning head is of a wide-mouth structure.

Compared with traditional cleaning devices for wind turbine nacelles, the device for cleaning and maintaining the interior of a hub in a wind turbine nacelle provided by the invention has the following advantages.(1) The combined cleaning assembly for removing oil contaminants and the maintenance assembly are respectively arranged at two ends of the switching assembly. By starting the switching drive motor in the switching assembly, the switching drive gear is driven to engage with the switching center gear, causing the combined cleaning assembly and the maintenance assembly located at the two ends of the switching assembly to move to the operation port in the handle component, enabling the conversion of oil contaminant cleaning and oiling. The switching center gear and the switching body are provided with the gear locking position and the auxiliary locking position respectively, and when the combined cleaning assembly and the maintenance assembly move to proper positions, the ball will be locked in the gear locking position and the auxiliary locking position under the pressure of the compression spring, ensuring the precise switching of the combined cleaning assembly and the maintenance assembly.(2) By arranging the high-temperature cleaning mechanism in the steam chamber of the switching assembly, high-temperature steam generated can effectively remove oil contaminants adhering to mechanisms in a hub in a wind turbine nacelle under the driving of the micro fan. By starting the contaminant collection pump in the contaminant collection chamber, a vacuum is formed, so that oil contaminants detached from the mechanisms in a hub in a wind turbine nacelle can be sucked into the contaminant collection cylinder, facilitating the removal of oil contaminants.(3) The operation port in the handle component is connected with the cleaning head. The front end of the cleaning head is of a wide-mouth structure, and the body of the cleaning head is of a flexible structure that can be extended and bent. The steam chamber and the contaminant collection chamber in the combined cleaning assembly can synchronously communicate with the cleaning head, facilitating the suction of contaminants after steam cleaning.(4) After oil contaminants adhering to mechanisms in a hub in a wind turbine nacelle are removed, the screw motor in the maintenance assembly of the oil filling chamber can be started to drive the oiler and the oil filling pipe to move towards the front end, allowing the oil filling pipe to extend out of the cleaning head. By starting the oil extrusion motor, the oil extrusion gear is driven to engage with the oil extrusion rack, driving the piston column to extrude lubricating oil in the oiler. The lubricating oil is then applied to the surfaces of mechanisms in a hub in a wind turbine nacelle through the oil filling pipe to complete the maintenance work, achieving multiple functions and a high level of integration.

DETAILED DESCRIPTION OF THE INVENTION

In order to make the purpose, technical scheme and advantages of the embodiments of the invention more clear, the technical scheme in the embodiments of the invention will be clearly and completely described below in combination with attached drawings. Obviously, the described embodiments are only part of the embodiments of the invention, not all of them. Based on the embodiments of the invention, all other embodiments obtained by those of ordinary skill in the art without making creative labor shall belong to the scope of protection of the invention.

In the description of the invention, it should be noted that directional or positional relationships indicated by the terms such as “center”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, and “outer” are based on the directional or positional relationships shown in the drawings, which are only for the convenience of describing the invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the invention. In addition, the terms “first” and “second” are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

The following is an exemplified description of a device for cleaning and maintaining the interior of a hub in a wind turbine nacelle provided by the invention, with reference to the accompanying drawings.

Embodiment I

Examples of cleaning transmission mechanisms in a hub in a wind turbine nacelle according to the invention are shown inFIGS.1,2,3,4,5,6,7,8and9. An integrated handgrip101in a handle component1is a main structural body of a cleaning and maintenance device, a switching inner cavity102runs through the integrated handgrip101, a switching shaft block103is arranged at a middle position of an outer side wall of a main front of the integrated handgrip101, and a switching shaft202is fixed at a middle position of an outer end face of a switching body201in a switching assembly2; the switching shaft202is rotatably connected to the switching shaft block103, and the switching body201is located in the switching inner cavity102; a switching center gear203is fixedly inserted in a shaft end face of the switching shaft202, and a switching drive gear204meshes with one side of the switching center gear203; the switching drive gear204is connected with a switching drive motor205by a shaft, and the switching drive motor205is fixed on the outer side wall of the main front of the integrated handle101.

The switching body201is divided into three chambers, namely a steam chamber216, a contaminant collection chamber217and an oil filling chamber218, the three chambers are completely isolated, the steam chamber216and the contaminant collection chamber217are provided with a combined cleaning assembly3for high-temperature steam cleaning and negative-pressure contaminant suction, and a maintenance assembly4for oiling maintenance is arranged in the oil filling chamber218.

By starting the switching drive motor205, the switching drive gear204is driven to engage with the switching center gear203, so that the combined cleaning assembly3and the maintenance assembly4on the switching body201can be driven to rotate to the operation port104.

Preferably, two ends of a bottom surface of a main body of the switching body201are respectively provided with auxiliary locking positions206, and auxiliary ball positions207corresponding to the auxiliary locking positions206in position are arranged on the outer wall of the main front of the integrated handgrip101; an auxiliary ball locking position208is fixed at a bottom end of the auxiliary ball position207, a ball209is slidably connected in the auxiliary ball position207, a compression spring base211is fixed at an upper end of the auxiliary ball position207, and a compression spring210is elastically connected between the ball209and the compression spring base211; in this way, after the steam chamber216, the contaminant collection chamber217and the oil filling chamber218at two ends of the main body of the switching body201rotate into position, the ball209is just locked in the auxiliary locking position206under the elastic pressure of the compression spring210.

Preferably, a plurality of groups of gear locking positions212are uniformly arranged on an outer main surface of the switching center gear203centered on the switching shaft202; a gear locking position base213is fixed on the outer wall of the main front of the integrated handgrip101, and a gear ball position214is arranged on a side, near the switching center gear203, of the gear locking position base213; a gear ball locking position215is fixed at a bottom end of the gear ball position214, and the ball209, the compression spring210and the compression spring base211are common parts; another group of balls209are slidably connected in the gear ball position214, another group of compression spring bases211are fixed at an upper end of the gear ball position214, and another group of compression springs210are elastically connected between another group of balls209and the compression spring bases211; in this way, the switching center gear203is able to rotate at a fixed position, and when another group of balls209are locked in one group of gear locking positions212, the balls209located at two ends of the main body of the switching body201are precisely locked into the auxiliary locking positions206, achieving dual-locking of the steam chamber216, the contaminant collection chamber217, and the oil filling chamber218at the two ends of the main body of the switching body201after rotating into position, thus enhancing operational accuracy.

One end of a steam valve301in the combined cleaning assembly3is connected to a side, near the steam outlet219, of an outer wall of a cavity of the switching body201, the other end of the steam valve301is connected with an atomizer302, the other end of the atomizer302is connected with a rapid heating pipe303, the other end of the rapid heating pipe303is connected with a water tank304, and a water tank cover305is installed at a top opening of the water tank304. After injecting pure water into the water tank304, the pure water is subjected to one-pass heating through the rapid heating pipe303and then atomized by the atomizer302to form high-temperature steam. Upon opening the steam valve301, the high-temperature steam will enter the steam chamber216.

A fan installation position306is further arranged on the outer wall of the cavity of the switching body201, the fan installation position306is located behind the steam valve301, a micro fan307is inserted in the fan installation position306, and an air inlet filter element308is installed at an air inlet of the micro fan307. After the micro-fan307is started, outside air enters the steam chamber216after being filtered through the air inlet filter element308. The high-temperature steam generated in the steam chamber216can be driven to move to the steam outlet219, and the steam outlet219communicates with the cleaning head313. By placing the cleaning head313against the surfaces of transmission mechanisms in a hub in a wind turbine nacelle, the high-temperature steam comes into contact with the transmission mechanisms in a hub in a wind turbine nacelle, causing oil contaminants to be detached from the surfaces of the transmission mechanisms. Then by starting the contaminant collection pump311, a vacuum is generated in the contaminant collection chamber217which communicates with the cleaning head313through the contaminant collection inlet220, so that oil contaminants detached from the surfaces of the transmission mechanisms can be sucked into the contaminant collection cylinder312, facilitating the removal of oil contaminants adhering to the transmission mechanisms.

Embodiment II

Examples of maintenance after cleaning transmission mechanisms in a hub in a wind turbine nacelle according to the invention are shown inFIGS.1,2,3,4,5,6,10and11. After removing oil contaminants adhering to the transmission mechanisms in a hub in a wind turbine nacelle, the switching drive motor205is started again, the switching drive gear204is driven to engage with the switching center gear203, so that the maintenance assembly4on the switching body201can be driven to rotate to the operation port104.

An oil filling pipe base401in the maintenance assembly4is arranged on a front end face of the oil filling chamber218, an oil filling pipe402is inserted into the oil filling pipe base401, and a tail end of the oil filling pipe402is connected to one side of a lower end of an oiler403; a propulsion slide base404is fixed to a bottom of the oiler403, the propulsion slide base404is connected in a propulsion screw405in an adaptive manner, a front end of the propulsion screw405is rotatably connected to a front screw base406, a rear end of the propulsion screw405is rotatably connected to a rear screw base407, and the front screw base406and the rear screw base407are fixed on an inner wall of the oil filling chamber218; an end shaft of the propulsion screw405is connected with a screw motor408, and the screw motor408is fixed on the inner wall of the oil filling chamber218; and an oiler slide base410is fixed on an outer wall of the oiler403, an upper wall of an inner cavity of the oil filling chamber218is provided with an oiler slide position409, and the oiler slide base410is slidably connected in the oiler slide position409.

By starting the screw motor408, the propulsion screw405is driven to rotate, and the propulsion screw405is engaged with the propulsion slide base404to drive the oiler403to move. The oiler slide base410located at the outer end of the oiler403slides in the oiler slide position409, the movement of the oiler403drives the oil filling pipe402to move out of the oil filling pipe base401, and finally the oil filling pipe402is moved out of the cleaning head313, achieving a high level of automation.

A top of the oiler403is provided with an oil filling cover411, a middle position of a top of the oil filling cover411is provided with an oil extrusion rack base412, an oil extrusion rack413is slidably connected in the oil extrusion rack base412, a piston column416is fixed at a lower end of the oil extrusion rack413, and the piston column416is located in an inner cavity of the oiler403; and one side of the oil extrusion rack413meshes with an oil extrusion gear414, the oil extrusion gear414is connected with an oil extrusion motor415by a shaft, and the oil extrusion motor415is fixed on the upper end face of the oil filling cover411.

By starting the oil extrusion motor415, the oil extrusion gear414is driven to be engaged with the oil extrusion rack413, and the oil extrusion rack413drives the piston column416to move downwards in the oiler403, thus extruding the lubricating oil in the oiler403. The lubricating oil is then applied to the outer surfaces of the transmission mechanisms in a hub in a wind turbine nacelle through the oil filling pipe402, completing the maintenance work after cleaning.

Finally, it should be noted that the above embodiments are only used to illustrate the technical scheme of the invention, but not to limit it. Although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that the technical scheme described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of each embodiment of the invention.