Patent ID: 12253072

DETAILED DESCRIPTION

The technical solution of the application will be described clearly and completely with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, not all of them. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection in the application.

Embodiment 1

Diaphragm booster pump100, source water200, pressurized water300, water outlet block1, pump head block2, diaphragm3, water outlet check valve4, water inlet check valve5, piston chamber6, first eccentric wheel bearing7, first eccentric wheel8, first balance wheel9, second balance wheel10, second eccentric wheel11, second eccentric wheel bearing12, water inlet block13, motor shaft14, and motor15:

first piston chamber6a, second piston chamber6b, third piston chamber6c, water outlet chamber601, booster chamber602, water inlet chamber603, water outlet604, water inlet605, first cavity606, water inlet hole1301of water inlet block, and water inlet channel1302.

As shown inFIGS.3and4, this embodiment provides a pump head of a diaphragm booster pump, comprising a piston chamber6, a diaphragm3, a first eccentric wheel8, a second eccentric wheel11, a first balance wheel9, a second balance wheel10, and a motor shaft14.

An eccentric assembly comprises the motor shaft14, the first eccentric wheel8and the second eccentric wheel11.

A balance wheel assembly comprises a first balance wheel and a second balance wheel.

The diaphragm booster pump of the present invention realizes the driving of water flow through the radial deformation of the diaphragm3. Compared with an existing diaphragm booster pump with the same volume, the flow rate is obviously improved, and vibration and noise are reduced.

As shown inFIGS.4and7, the piston chamber6is generally in a shape of a hollow annulus or cylinder overall, and the piston chamber6comprises one piston chamber assembly or is formed by assembling a plurality of piston chamber assemblies.

In an alternative solution, the piston chamber6comprises a first piston chamber6a, a second piston chamber6band a third piston chamber6cwhich are fan-shaped or arc-shaped, and the first piston chamber6a, the second piston chamber6band the third piston chamber6care assembled to form the piston chamber6. In an alternative solution, the radians of the first piston chamber6a, the second piston chamber6band the third piston chamber6care all 120°, and an inner wall of the piston chamber6is provided with a water outlet chamber601, a booster chamber602and a water inlet chamber603.

The water inlet chamber603communicates with the booster chamber602through a water inlet605, and optionally, the water inlet chamber603is arranged below the booster chamber602. The booster chamber602communicates with the water outlet chamber601through a water outlet604, and optionally, the water outlet chamber601is arranged above the booster chamber602.

As shown inFIG.10, the water inlet block13is provided with a water inlet hole1301and a water inlet channel1302communicating with the water inlet chamber603.

As shown inFIG.11, the water outlet block1is provided with a water outlet hole101, and the pump head block2is provided with a water outlet channel201communicating with the water outlet chamber601and the water outlet block1.

As shown inFIG.12, source water enters the water inlet chamber603through the water inlet hole1301via the water inlet channel1302, and enters the booster chamber602through the water inlet605. Water in the booster chamber602enters the water outlet chamber601through the water outlet604, then enters the water outlet block1through the water outlet channel201, and is finally discharged through the water outlet hole101.

A water inlet check valve5is arranged at the water inlet605, which only allows water to flow from the water inlet chamber603to the booster chamber602, and the water inlet check valve5may be a rubber valve or other suitable valves.

A water outlet check valve4is arranged at the water outlet604, which only allows water to flow from the booster chamber602to the water outlet chamber601, and the water outlet check valve4may be a rubber valve or other suitable valves.

As shown inFIGS.4and6, the diaphragm3has a circular or cylindrical radial cross section and is arranged in a cavity of the piston chamber6. The diaphragm3comprises one diaphragm or a plurality of diaphragm assemblies, and the plurality of diaphragm assemblies enclose the piston chamber6to form the booster chamber602. In an alternative solution, the diaphragm3comprises a first diaphragm3a, a second diaphragm3band a third diaphragm3cwhich are fan-shaped or arc-shaped, and the first diaphragm3a, the second diaphragm3band the third diaphragm3care assembled to form the diaphragm3. The diaphragm3is made of an elastic material, such as rubber, and is arranged in the cavity of the piston chamber6.

An outer wall of the diaphragm3is in close contact with the inner wall of the piston chamber6to form the water outlet chamber601, the booster chamber602and the water inlet chamber603through enclosing. A part of the diaphragm3which encloses the booster chamber602swings radially as a deformation area of the diaphragm to generate radial deformation, so that the volume of the booster chamber602can be expanded or compressed.

The diaphragm assembly and the piston chamber assembly have the same shape or different shapes.

The diaphragm3or the piston chamber6is integrated or assembled.

As shown inFIGS.4and9, a transmission unit is used to drive the part of the diaphragm3which encloses the booster chamber to swing in a radial direction of the pump head. When the deformation area of the diaphragm3moves in an expansion direction, the water inlet check valve4opens, and source water enters through the water inlet hole1301of the water inlet block13, enters the water inlet chamber603through the water inlet channel1302, and is sucked into the booster chamber602through the water inlet605. When the deformation area of the diaphragm3moves in a compression direction, the water outlet check valve4opens, and pressurized water in the booster chamber602is pressed into the water outlet chamber601through the water outlet604, enters the water outlet block1through the water outlet channel201, and is discharged through the water outlet hole101.

The pump head of the diaphragm booster pump of this embodiment realizes the driving of water flow through the radial deformation of the diaphragm3. Compared with the traditional diaphragm booster pump, the radial deformation of the diaphragm3can effectively increase the deformation area of the diaphragm and a variable volume of the booster chamber without changing a volume of a pump body and a rotation speed of the motor, so as to increase a flow rate of the diaphragm booster pump.

As shown inFIGS.4and7, in this embodiment, a plurality of booster chambers602are arranged on the piston chamber6, the number of the booster chambers602is preferably 6 or 10, and the plurality of booster chambers are oppositely arranged around a center point of the piston chamber into 3 pairs, 5 pairs or more pairs. The plurality of booster chambers602are arranged to meet the requirement for increasing the flow rate of the diaphragm booster pump, so that the working efficiency of the diaphragm booster pump can be improved. In this embodiment, the plurality of the booster chambers602are oppositely arranged along the inner wall of the piston chamber, that is, the plurality of the booster chambers602are oppositely arranged in pairs around the center point of the piston chamber. In a plan view, a center line of one booster chamber and a center line of the other booster chamber which is opposite thereto are located on a same diameter line of the piston chamber6. In this embodiment, the number of the booster chambers602is 3 to 6, which can be adjusted by those skilled in the art as needed.

According to an alternative technical solution of this embodiment, two opposite booster chambers form a pair, and the plurality of pairs of booster chambers expand or compress in sequence under the driving of the transmission unit.

According to an alternative technical solution of this embodiment, the transmission unit of the pump head of the diaphragm booster pump of the invention comprises a pump head block2, a first balance wheel9, a second balance wheel10, a first eccentric wheel bearing7, a first eccentric wheel8, a second eccentric wheel bearing12, a second eccentric wheel11and a motor shaft14.

The transmission unit is connected to the diaphragm3, and drives the part of the diaphragm3which encloses the booster chamber to swing in the radial direction.

As shown inFIG.5, the pump head block2is disposed in a second cavity301of the diaphragm3. A side wall of a lower part of the pump head block2is provided with a balance wheel hole202, which communicates with a third cavity206, and an upper part of the pump head block2is provided with the water outlet channel201which communicates with the water outlet chamber601and the water outlet block1.

Optionally, the pump head block2is provided with an upper water outlet structure205and a bracket203, the bracket203is a frame-shaped structure provided with the balance wheel hole202, and a block body204is provided with a water inlet block groove, which is connected to the water inlet block13in a suitable connection mode such as threads.

As shown inFIGS.8and13, the first balance wheel9and the second balance wheel10are arranged in the third cavity206of the pump head block2, bearing holes are formed in the first balance wheel9and the second balance wheel10, and outer walls of the first balance wheel9and the second balance wheel10are respectively provided with a first boss901and a second boss1001. The first boss901is I-shaped, L-shaped, n-shaped or M-shaped, and the second boss1001is I-shaped, L-shaped, u-shaped or W-shaped. The shapes of the first boss901and the second boss1001are the same or different, and the first boss901and the second boss1001are oppositely arranged into a group to form a whole. The first boss901and the second boss1001are controlled by the first eccentric wheel and the second eccentric wheel respectively, and move in opposite directions.

The first boss901and the second boss1001can swing through the balance wheel hole202of the pump head block2in the radial direction. The first boss901and the second boss1001are connected to the diaphragm3. When the first balance wheel9and the second balance wheel10swing in the radial direction, the diaphragm3is driven by the first boss901and the second boss1001to swing in the radial direction, thus realizing the expansion or compression of the booster chamber.

The number of the first bosses901and the second bosses1001is the same as that of the booster chambers602, and each of the first bosses901and the second bosses1001corresponds to one booster chamber602. In this embodiment, the number of the bosses is 6.

As shown inFIG.4, the first eccentric wheel bearing7and the second eccentric wheel bearing12are arranged in the bearing holes of the first balance wheel9and the second balance wheel10, and outer rings of the first eccentric wheel bearing7and the second eccentric wheel bearing12are respectively in close contact with inner walls of the first balance wheel9and the second balance wheel11. In this embodiment, the first eccentric wheel bearing7and the second eccentric wheel bearing12are suitable parts such as ball bearings. Further, the outer rings of the first eccentric wheel bearing7and the second eccentric wheel bearing12are in interference fit with the inner walls of the first balance wheel9and the second balance wheel10respectively.

The first eccentric wheel8and the second eccentric wheel11are arranged in inner holes of the first eccentric wheel bearing7and the second eccentric wheel bearing12, and the eccentric directions of the first eccentric wheel8and the second eccentric wheel11are opposite, that is, a thick part of the first eccentric wheel8corresponds to a thin part of the second eccentric wheel11. When the motor shaft14rotates, the first balance wheel9and the second balance wheel10controlled by the first eccentric wheel8and the second eccentric wheel11move in opposite directions.

As shown inFIG.15, the present invention lengthens a traditional motor shaft, and realizes an eccentric rotation by one concentric shaft and the opposite eccentric design of upper and lower eccentric wheels, so that the corresponding balance wheels are driven to move in opposite directions. A traditional D-shaped rotating shaft is provided with a cutting surface, which is used for clamping and fixing an inner side of an eccentric wheel. In this solution, a second cutting surface which is symmetrical with a first cutting surface is provided for the purpose of balance, the shape of the cutting surface is complementary to an inner ring of an eccentric wheel, and the dynamic balance of the rotating shaft is also ensured.

When the motor shaft14rotates, the first eccentric wheel8and the second eccentric wheel11rotate with the motor shaft14, and the first balance wheel9and the second balance wheel10cannot rotate due to the restriction of the balance wheel hole202of the pump head block2, and can only swing in the radial direction. The radial swing of the first balance wheel9and the second balance wheel10drives the diaphragm3to realize reciprocating expansion or compression.

The first balance wheel9and the second balance wheel10are respectively provided with bosses uniformly distributed along a circumference, and the bosses on the first balance wheel9and the bosses on the second balance wheel10are staggered at intervals, so that the bosses901and1001are oppositely staggered in pairs, that is, center lines of the bosses901and those of the bosses1001are located on a same diameter line of the piston chamber in a plan view.

The first eccentric wheel8and the second eccentric wheel11share the motor shaft14, and the eccentric directions of the first eccentric wheel8and the second eccentric wheel11are opposite.

As the eccentric direction of the first eccentric wheel8is opposite to the eccentric direction of the second eccentric wheel11, when the motor shaft14rotates, the first balance wheel9and the second balance wheel10swing in opposite directions in the radial direction at any time, so as to drive two opposite booster chambers in one pair to expand or compress synchronously in the radial direction in a reciprocating manner.

After the motor shaft14rotates by one circle, the diaphragm deformation area of the diaphragm returns to an initial position, that is, the volume of the booster chamber is the largest, and the booster chamber expands in this process.

Therefore, every time the motor shaft14rotates by one circle, the booster chamber completes one expansion and compression cycle.

The same is true for the other two pairs of booster chambers. Every time the motor shaft14rotates by one circle, the three pairs of booster chambers complete one expansion and compression cycle.

Swing amplitudes of the first balance wheel9and the second balance wheel10are determined by eccentric distances of the first eccentric wheel8and the second eccentric wheel11, which can vary with the pump volume. Swinging speeds of the first balance wheel and the second balance wheel are determined by the motor shaft, and the first balance wheel9and the second balance wheel10complete a reciprocating motion every time the motor shaft14rotates by one circle.

In this embodiment, through the cooperation of the transmission unit, the piston chamber6and the diaphragm3, the booster chambers are arranged opposite to each other around the center point of the piston chamber in a centripetal manner, and two oppositely arranged booster chambers602are grouped into one pair. For example, six booster chambers602are divided into three pairs, and driven by the motor shaft14, the first eccentric wheel8and the second eccentric wheel11to expand or compress in turn. The centripetal opposite arrangement structure of this embodiment ensures that a radial resultant force of the motor shaft14is zero during work, and achieves the purpose of reducing the vibration of the diaphragm booster pump and lowering noise.

As shown inFIG.15, the motor shaft14of the invention is of a balanced and symmetrical structure, and two sides of the motor shaft14are symmetrically provided with the first cutting surface1401and the second cutting surface1402, thus avoiding the unbalanced weight distribution of the traditional D-shaped motor shaft and further reducing the vibration of the diaphragm booster pump.

As shown inFIGS.4and14, the first balance wheel9and the second balance wheel10drive the deformation area of the diaphragm3to make reciprocating expansion or compression movement in the radial direction, so as to realize the radial expansion or compression of the booster chamber602. When the deformation area of the diaphragm3moves in the expansion direction, the water inlet check valve5opens, and source water enters the water inlet chamber603via the water inlet channel1302through the water inlet hole1301, and then is sucked into the booster chamber602through the water inlet605. When the deformation area of the diaphragm3moves in the compression direction, the water outlet check valve4opens, and pressurized water is pressed out, enters the water outlet chamber601through the water outlet604, enters the water outlet block1through the water outlet channel201, and finally is discharged out of the pump through the water outlet hole101to provide required high-pressure water.

The first balance wheel and the second balance wheel drive each pair of oppositely arranged booster chambers to expand or compress at the same time, thus ensuring that the radial resultant force of the motor shaft14is zero during work, and reducing the vibration of the diaphragm booster pump.

As shown inFIGS.4and14, a method of operating the pump head of the diaphragm booster pump is as follows: the transmission unit drives the deformation area of the diaphragm to make reciprocating expansion or compression movement in the radial direction, so that the booster chamber expands or compresses radially: when the deformation area of the diaphragm moves in the expansion direction, the water inlet check valve opens, and source water is sucked into the booster chamber through the water inlet chamber via the water inlet; and when the deformation area of the diaphragm moves in the compression direction, the water outlet check valve opens, and pressurized water is pressed out, enters the water outlet chamber through the water outlet, and is discharged from the water outlet chamber.

According to an alternative technical solution of the invention, in the method, the eccentric wheels are driven by a driving unit, the plurality of booster chambers are arranged opposite to each other around the center point of the piston chamber in a centripetal manner, two opposite booster chambers form a pair and driven by the eccentric wheels, and the plurality of pairs of booster chambers expand or compress in sequence.

According to an alternative technical solution of the invention, in the method, two balance wheels are arranged, and the first balance wheel and the second balance wheel swing in opposite directions under the action of the eccentric wheels, so that the radial resultant force of the motor shaft is zero.

The present invention also provides a diaphragm booster pump adopting the pump head of a diaphragm booster pump.

The invention also provides a water treatment device adopting the diaphragm booster pump of the invention and equipment comprising the water treatment device, such as a water filter, a water purifier, a filter, a coffee machine or the like.

Embodiment 2

This embodiment provides a six-cylinder opposed balanced diaphragm booster pump, which fundamentally solves the problem of large noise caused by vibration of an existing diaphragm pump in operation. The novel diaphragm pump keeps the radial stress and moment of a rotating shaft balanced and keeps the rotating shaft dynamically balanced at any time in operation, which greatly reduces the vibration and noise generated by the diaphragm pump in operation.

The main function of this embodiment, noise reduction, is realized by a specially designed transmission assembly600which can realize radial stress balance, moment balance and dynamic balance of a rotating shaft at any time during work. As shown in the figures, the transmission assembly consists of four bearings, a central shaft and an eccentric shaft fixed to a motor shaft, two small balance wheels, one big balance wheel and six swing arms fixed to the balance wheels. The balance wheels are connected to the central shaft and the eccentric shaft by bearings. Three of the six swing arms are fixed to the two small balance wheels, and the other three are fixed to the big balance wheel to form a split structure. The center shaft and the eccentric shaft form a rotating shaft assembly. The rotating shaft assembly is provided with two small cylindrical eccentric sections with the same eccentric direction and equal mass and a big cylindrical eccentric section. Eccentric directions of the small eccentric sections and the big eccentric section are opposite, and eccentric forces of the three eccentric sections counteract each other and moment balance is realized during rotation, so the dynamic balance can be achieved. Installation positions of the big and small balance wheels and connecting bearings are shown inFIG.23. When the motor works, an eccentric part of the rotating shaft drives the balance wheels and the swing arms to swing eccentrically through four bearings. At this point, a movable part of a diaphragm sleeved on the swing arm will also swing eccentrically with the swing arm, so that the diaphragm completes the radial reciprocating movement to realize the boosting function. When the motor works, for the whole transmission assembly, a radial eccentric resultant force generated by the eccentric motion at the big balance wheel and the eccentric motion at the two small balance wheels is zero, and the resultant moment keeps balanced. Therefore, the whole transmission assembly is in a dynamically balanced state in operation, and the transmission assembly running smoothly generates no serious noise caused by radial vibration, thus achieving the purpose of noise reduction.

Six pairs of swing arms distributed symmetrically around a circumference can synchronously reciprocate through a group of eccentric wheels, that is, rotate by one circle, while a group of opposite eccentric swing arms synchronously reciprocate around the center shaft. Three groups of swing arms reciprocate once in every circle. When the reciprocating motion of each group of swing arms passes through the eccentric wheel and the balance wheel linked therewith, the eccentric wheel rotates around the center shaft to reach a highest point and a lowest point, and the diaphragm linked therewith deforms to realize the volume change in the booster chamber.

In Embodiment 1, although an axial opposite distribution structure is realized, and an axial synchronous opposite movement mode is also realized, the balance wheels are arranged in an opposite insertion mode, that is, axial distribution is symmetrical, but horizontal distribution is not on the same horizontal plane, which leads to a certain degree of vibration caused by unbalanced mass distribution during rotation, resulting in noise. For the transmission assembly in Embodiment 2, the balance wheels, the swing arms and the eccentric shaft are not only distributed symmetrically in the axial direction, but also distributed symmetrically in the horizontal direction. As shown in the diagram, the balance wheels are distributed symmetrically in both the axial direction and the horizontal direction, so that force balance, dynamic balance and moment balance can be kept during rotation, so as to minimize vibration and noise.

The structural features of Embodiment 2 will be described in detail below.

Reference numerals: transmission assembly600, eccentric assembly700, balance wheel assembly800, diaphragm booster pump104, water outlet block01, pump head block02, diaphragm03, water outlet check valve04, water inlet check valve05, piston chamber06, first eccentric wheel bearing07, first eccentric wheel08, first balance wheel09, second balance wheel010, second eccentric wheel011, second eccentric wheel bearing012, water inlet block013, motor shaft014, motor015, third eccentric wheel016, third eccentric wheel bearing017, third balance wheel018, pressurized water0300, booster chamber0602, source water0200, motor shaft014, motor015, water outlet channel0201, balance wheel hole0202, bracket0203, water outlet structure0205, first boss0901, second boss01001, water inlet hole01301, water inlet channel01302, first cutting surface01401, second cutting surface01402, water outlet0604, water outlet chamber0601, block body0204, third cavity0206, diaphragm03, first diaphragm03a, second diaphragm03b, third diaphragm03c, second cavity0301, first piston chamber06a, second piston chamber06b, third piston chamber06c, water inlet chamber0603, water inlet0605and first cavity0606.

A movement of two eccentric wheels with a phase difference of 180° in the eccentric assembly700drives balance wheels of the balance wheel assembly to move oppositely.

During rotation of the eccentric assembly700, eccentric forces counteract each other, and moment balance is realized.

A resultant force of radial eccentric forces generated by the eccentric movement of the balance wheel assembly800is zero, and resultant moment balance is realized.

The eccentric assembly700comprises a first eccentric wheel08, a second eccentric wheel011and a third eccentric wheel016in sequence, the first eccentric wheel08and the third eccentric wheel016are similarly eccentric, and the second eccentric wheel011is eccentric in an opposite manner to the first eccentric wheel08and the third eccentric016.

The balance wheel assembly comprises a big balance wheel and small balance wheels, which are a first balance wheel09(also referred to as first small balance wheel), a second balance wheel010(also referred to as big balance wheel) and a third balance wheel018(also referred to as second small balance wheel) in sequence, and the eccentric assembly700drives the balance wheel assembly800to swing eccentrically through eccentric wheel bearings07,012,017.

The transmission assembly600of the pump head comprises a central shaft fixed to the motor shaft14, the eccentric assembly700, the balance wheel assembly800, the eccentric wheel bearings07,012,017, and swing arms fixed to the balance wheel assembly800.

A part of the swing arms are fixed to the small balance wheels09,018, and another part of the swing arms are fixed to the big balance wheel010to form a split structure.

Two of the booster chambers0602oppositely arranged around a center point of the piston chamber form a pair, and center lines of the pair of the booster chambers0602are on a same diameter line of the piston chamber.

At least three pairs of the booster chambers0602expand or compress in sequence. Every time the motor shaft14rotates by one circle, the booster chambers0602complete one expansion and compression cycle.

A radial reciprocating motion of the balance wheels09,010,018of the balance wheel assembly800drives the diaphragms03a,03b,03cto radially deform, so that the booster chamber0602radially expands or compresses.

Contact parts between the diaphragms03a,03b,03cand the swing arms of the balance wheels are deformation area of the diaphragms, and the formation area of the diaphragms are deformed.

The small balance wheels09,018and the big balance wheel010simultaneously deviate from or move towards an axial center of the motor shaft14, forces in a radial direction counteract each other, and a resultant force is zero.

When thin parts of the first eccentric wheel08and the third eccentric wheel016rotate to the balance wheels linked therewith, the small balance wheels09,018push the deformation area of the diaphragm corresponding to the small balance wheels09,018is pushed to be near a center point of the piston chamber06, and the volume of the booster chamber corresponding to the small balance wheels09,018is the largest; and an eccentric position of the second eccentric wheel011is opposite to eccentric positions of the first eccentric wheel08and the third eccentric wheel016, so when a thin part of the second eccentric wheel011rotates to the big balance wheel010linked therewith, the corresponding deformation area of the diaphragm is near the center point of the piston chamber06, and the volume of the booster chamber0602is the largest.

When thick parts of the first eccentric wheel08and the third eccentric wheel016rotate to the small balance wheels09,018linked therewith, the diaphragm deformation area of the diaphragm corresponding to the balance wheel is away from the center point of the piston chamber06, and the volume of the booster chamber0602is the smallest; and when a thick part of the second eccentric wheel011rotates to the big balance wheel010linked therewith, the corresponding diaphragm deformation area of the diaphragm is away from the center point of the piston chamber06, and the volume of the booster chamber0602is the smallest.

The motor shaft14has a first cutting surface01401and a second cutting surface01402which is symmetrical with the first cutting surface to realize balance.

When the diaphragms03a,03b,03cmove in an expansion direction, a water inlet check valve05opens and source water is sucked into the booster chambers0602; and when the diaphragms03a,03b,03cmove in a compression direction, a water outlet check valve04opens and pressurized water is discharged.

The diaphragm03comprises at least one diaphragm or a plurality of diaphragm03a,03b, and03cassemblies, which are assembled to form the diaphragm.

The piston chamber06comprises at least one piston chamber assembly06a,06b,06c, and a plurality of piston chamber assemblies are assembled to form the piston chamber.

The diaphragm03or03a,03b,03cor the piston chamber06or06a,0b6,06cis integrated or assembled.

The diaphragm03or03a,03b,03cis attached to an inner wall of the piston chamber06or06a,06b,06cto form a water outlet chamber0601, the booster chamber0602, and a water inlet chamber0603through enclosing.

A diaphragm booster pump comprising the pump head of a diaphragm booster pump is provided.

A water treatment device comprising the diaphragm booster pump is provided.

A method of operating the pump head of the diaphragm booster pump is as follows: the transmission unit drives the deformation area of the diaphragm to expand or compress radially: during the rotation of the eccentric assembly, eccentric forces counteract each other, and moment balance is realized: a resultant force of radial eccentric forces generated by the eccentric movement of the balance wheel assembly is zero, and the resultant moment keeps balanced, so that the booster chambers expand or compress radially: when the deformation area of the diaphragm moves in the expansion direction, the water inlet check valve opens, and source water is sucked into the booster chambers from a water inlet chamber via a water inlet; and when the deformation area of the diaphragm moves in the compression direction, the water outlet check valve opens, and pressurized water is pressed out, enters a water outlet chamber through a water outlet, and is discharged from the water outlet chamber.

Further, a plurality of booster chambers are arranged opposite to each other around the center point of the piston chamber in a centripetal manner, two opposite booster chambers form a pair and are driven by the eccentric assembly, and the plurality of pairs of booster chambers expand or compress in sequence.

The embodiments of the application have been introduced in detail above. Specific examples are applied herein to illustrate the principle and implementation of the application. The above embodiments are only used to help understand the technical solution of the application and its core ideas. The changes or deformations made by those skilled in the art based on the ideas of the application and the specific implementation and application scope of the application are within the scope of protection of the application. To sum up, the content of this specification should not be construed as a limitation of the application.