CN216306191U - Eccentric assembly, transmission part, pump head and diaphragm booster pump - Google Patents

Abstract

The application provides an eccentric subassembly, transmission part, pump head and diaphragm booster pump of diaphragm booster pump, eccentric subassembly include first eccentric wheel and second eccentric wheel, first eccentric wheel connect in the second eccentric wheel, the eccentric direction of first eccentric wheel with the eccentric direction of second eccentric wheel is parallel, wherein, first eccentric wheel with the eccentric angle of second eccentric wheel is the same, and is in 0.5 ~ 10 within range. The technical scheme of this application has reduced the vibrations of diaphragm booster pump and has reduced the noise.

Description

Eccentric assembly, transmission part, pump head and diaphragm booster pump

Technical Field

The application relates to the technical field of water treatment, in particular to an eccentric assembly, a transmission part, a pump head and a diaphragm booster pump.

Background

At present, a commonly used diaphragm booster pump causes volume change through periodic movement of a diaphragm sheet, and drives a rubber valve to periodically close and open a water inlet and a water outlet on a valve seat, so as to realize boosting.

As shown in fig. 1 and 2, the key components of the conventional diaphragm booster pump include a motor, an eccentric wheel, a wobble wheel seat with three wobblers, a diaphragm sheet divided into three piston actuation zones, three pistons, a piston chamber including three sets of water inlets and a set of water outlets, a three-water inlet check valve, a water discharge check valve, a water inlet hole and a water discharge hole; and the pump head cover comprises a water inlet flow passage and a water drainage flow passage which are separated from each other, wherein a source water cavity is formed between the water inlet flow passage of the pump head cover and the piston chamber, a high-pressure water cavity is formed between the water drainage flow passage of the pump head cover and the piston chamber, and three independent pressurizing water cavities are formed between the piston chamber and the diaphragm.

When the motor rotates, the eccentric wheel is driven to rotate, the balance wheels cannot rotate due to limitation, so that the three balance wheels can only generate axial reciprocating motion in sequence, the three piston actuating areas of the diaphragm can perform synchronous axial expansion-compression motion by the axial reciprocating motion of the balance wheels, when the diaphragm piston actuating areas move towards the expansion direction, the water inlet check valve is opened, source water is sucked into the pressurized water cavity from the water inlet, when the diaphragm piston actuating areas move towards the compression direction, the water discharge check valve is opened, pressurized water is pressed out, enters the high-pressure water cavity from the water discharge port, and is discharged out of the pump through the water discharge hole of the pump head cover, and required high-pressure water is provided.

The diaphragm booster pump has the defect that in the working process, the three balance wheels push the diaphragm in turn to continuously apply force in the same direction. When the rotating speed of the motor shaft reaches 700-1200rpm, the vibration generated by the alternate motion of the three balance wheels is extremely large, so that great noise is generated. In addition, the diaphragm booster pump has a small flow rate. The flow rate is increased, and the rotating speed of the motor is increased or the volume of the pump body is increased. However, increasing the motor speed can cause vibration and noise problems to be more serious, and the increased size can cause the booster pump to be difficult to install in cooperation with the existing equipment.

The statements in this background section merely disclose technology known to the inventors and do not, of course, represent prior art in the art.

SUMMERY OF THE UTILITY MODEL

The application aims at providing an eccentric subassembly, transmission, pump head and diaphragm booster pump, has solved the big and little problem of flow of current diaphragm booster pump vibration noise.

According to an aspect of the present application, there is provided an eccentric assembly of a diaphragm booster pump, the eccentric assembly including a first eccentric wheel and a second eccentric wheel, the first eccentric wheel being connected to the second eccentric wheel, an eccentric direction of the first eccentric wheel being parallel to an eccentric direction of the second eccentric wheel. The eccentric angles of the first eccentric wheel and the second eccentric wheel are the same and are within the range of 0.5-10 degrees.

According to some embodiments, the eccentric angles of the first eccentric and the second eccentric are the same and in the range of 1 ° to 5 °.

According to an aspect of the present application, a power transmission part of a diaphragm booster pump is provided, including: the eccentric assembly, drive shaft and balance wheel assembly as described above.

The balance wheel assembly comprises at least one pair of balance wheels, the at least one pair of balance wheels are arranged on the eccentric assembly, the driving shaft drives the eccentric assembly to rotate, and the cams with phases different by 180 degrees are arranged on each pair of balance wheels to move oppositely along the axial direction of the driving shaft.

According to some embodiments, the at least one pair of balances comprises: the first balance wheel is mounted on the first eccentric wheel, the second balance wheel is mounted on the second eccentric wheel, and when the driving shaft drives the eccentric assembly to rotate, the cams with the phase difference of 180 degrees on the first balance wheel and the second balance wheel approach or depart from each other along the axial direction of the driving shaft.

According to some embodiments, a plurality of cams are provided on each of the first balance and the second balance, the cams provided on the first balance and the cams provided on the second balance radially corresponding to each other along the drive shaft.

According to some embodiments, when the eccentric assembly rotates, the resultant force generated by the upward oscillation of the cams of the first balance and the second balance along the axis of the driving shaft is zero and balanced by the resultant moment.

According to some embodiments, the number of cams provided on each of the first balance and the second balance is the same, the number of cams being 4.

According to some embodiments, the cams on the balance assembly, which are 180 ° out of phase, complete one approach and one exit cycle in the axial direction of the drive shaft per revolution of the drive shaft.

According to an aspect of the present application, there is provided a pump head of a diaphragm booster pump, including: an eccentric assembly as described above or a transmission as described above.

According to an aspect of the present application, there is provided a diaphragm booster pump comprising a pump head as described above.

Based on foretell eccentric subassembly, transmission, pump head and diaphragm booster pump, the diaphragm booster pump of this application compares current diaphragm booster pump, because the pressure boost chamber increases, the pump flow obviously promotes, and the design of two eccentric wheels realizes that the resultant force that receives is zero all the time, makes diaphragm booster pump's vibrations reduce, and the noise reduces.

According to the double-eccentric wheel design, the eccentric angles of the first eccentric wheel and the second eccentric wheel are the same, and the axle center of the first eccentric wheel is parallel to the axle center of the second eccentric wheel, so that any cam group with 180-degree phase difference on the first balance wheel and the second balance wheel respectively moves oppositely along the axial direction of the driving shaft and is close to or far away from the driving shaft, and resultant force borne by the balance wheel assembly in the moving process is always zero. Any pair of pressurizing cavities with phase difference of 180 degrees simultaneously carries out capacity expansion and compression movement, so that resultant force borne by the pump in the working process is always zero. Compare traditional diaphragm booster pump and receive the unilateral power always, this application diaphragm pump during operation atress is balanced all the time, can reduce vibrations and noise reduction by a wide margin, can reach the effect of relative silence.

For a better understanding of the nature and technical content of the present application, reference should be made to the following detailed description and accompanying drawings, which are provided to illustrate the present application and are not intended to limit the scope of the present application in any way.

Drawings

Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The accompanying drawings, which are incorporated herein and constitute part of this disclosure, serve to provide a further understanding of the disclosure. The exemplary embodiments of the present disclosure and their description are provided to explain the present disclosure and not to limit the present disclosure. In the drawings:

fig. 1-2 show schematic diagrams of a conventional diaphragm booster pump.

Fig. 3 shows a schematic view of a pump head according to an example embodiment of the present application.

Fig. 4 shows a schematic cross-sectional view of a pump head according to an exemplary embodiment of the present application.

FIG. 5 shows a schematic view of an eccentric assembly according to an example embodiment of the present application.

Fig. 6 shows a schematic view of a transmission according to an exemplary embodiment of the present application.

Fig. 7 shows a schematic view of a balance assembly according to an example embodiment of the present application.

Fig. 8 shows an exploded view of a pump head according to an example embodiment of the present application.

FIG. 9 shows a schematic view of a boost assembly according to an example embodiment of the present application.

FIG. 10 shows a schematic view of a membrane sheet according to an example embodiment of the present application.

FIG. 11 shows a schematic view of a piston chamber according to an example embodiment of the present application.

FIG. 12 shows a schematic view of a pendulum wheel mount according to an example embodiment of the present application.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection, either mechanically, electrically, or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The preferred embodiments of the present application will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein only to illustrate and explain the present application and not to limit the present application.

Fig. 3 shows a schematic view of a pump head according to an example embodiment of the present application. Fig. 4 shows a schematic cross-sectional view of a pump head according to an exemplary embodiment of the present application.

As shown in fig. 3 to 4, according to an exemplary embodiment of the present application, the present application discloses a pump head 100 of a diaphragm booster pump, which includes a transmission portion and a pressurizing assembly, the transmission portion includes a driving shaft 13, an eccentric assembly 12, and a balance assembly 35, wherein the balance assembly 35 includes at least one pair of balances, the at least one pair of balances is mounted on the eccentric assembly 12, the driving shaft 13 drives the eccentric assembly 12 to rotate, cams 1001 with a phase difference of 180 ° are provided on each pair of balances to perform opposite movements along an axial direction of the driving shaft 13, and the pressurizing assembly is connected to the balance assembly 35 to expand or compress the pressurizing assembly along the axial direction of the driving shaft 13.

FIG. 5 shows a schematic view of an eccentric assembly according to an example embodiment of the present application. Fig. 6 shows a schematic view of a transmission according to an exemplary embodiment of the present application. Fig. 7 shows a schematic view of a balance assembly according to an example embodiment of the present application. Fig. 8 shows an exploded view of a pump head according to an example embodiment of the present application.

As shown in fig. 5, according to an embodiment of the present application, eccentric assembly 12 includes a first eccentric 1201 and a second eccentric 1202. The eccentric assembly 12 is fixed to the drive shaft 13.

First eccentric 1201 is connected to second eccentric 1202, the eccentric direction of first eccentric 1201 being parallel to the eccentric direction of second eccentric 1202.

The eccentric angles of the first eccentric wheel 1201 and the second eccentric wheel 1202 are the same and are in the range of 0.5-10 degrees. Preferably, the eccentricity angle may be set to 0.5 °, 1 °, 1.5 °, 2.5 °, 3.5 °, 5 °, 7.5 °, or 10 °.

Optionally, the eccentric angles of the first eccentric 1201 and the second eccentric 1202 are the same in this application and are in the range of 1 ° to 5 °.

As shown in fig. 6-8, according to an embodiment of the present application, at least one pair of balances comprises a first balance 10 and a second balance 15.

The first balance 10 is mounted on the first eccentric 1201, the second balance 15 is mounted on the second eccentric 1202, and when the driving shaft 13 rotates the eccentric assembly 12, the cams 1001 with a phase difference of 180 ° on the first balance 10 and the second balance 15 move closer to or farther from each other in the axial direction of the driving shaft 13.

A plurality of cams 1001 are provided on each of the first balance 10 and the second balance 15, and the cam 1001 provided on the first balance 10 and the cam 1001 provided on the second balance 15 correspond in the radial direction of the drive shaft 13.

According to the embodiment of the application, when the eccentric assembly 12 rotates, the resultant force generated by upward swinging along the axial direction of the driving shaft 13 between the cams 1001 which are correspondingly arranged on the first balance wheel 10 and the second balance wheel 15 and have the phase difference of 180 degrees is zero and is balanced, so that the purposes of shock absorption and noise reduction of the diaphragm booster pump are achieved.

FIG. 9 shows a schematic view of a boost assembly according to an example embodiment of the present application. FIG. 10 shows a schematic view of a membrane sheet according to an example embodiment of the present application. FIG. 11 shows a schematic view of a piston chamber according to an example embodiment of the present application. FIG. 12 shows a schematic view of a pendulum wheel mount according to an example embodiment of the present application.

According to an embodiment of the application, the pressurization assembly comprises a first pressurization assembly on which the first balance 10 acts and a second pressurization assembly on which the second balance 15 acts.

As shown in fig. 9-12, according to an embodiment of the present application, each of the first and second pressurizing assemblies includes a piston chamber 31 and a diaphragm 33.

The piston chamber 31 has a water inlet 403 and a water outlet 404, a water inlet check valve 32 is disposed at the water inlet 403, and a water outlet check valve 30 is disposed at the water outlet 404.

The diaphragm 33 is provided on the cam 1001, the diaphragm 33 and the piston chamber 31 form a first pressurizing chamber group and a second pressurizing chamber group, the first balance 10 corresponds to the first pressurizing chamber group, and the second balance 15 corresponds to the second pressurizing chamber group.

The piston chamber 31 includes a first piston chamber 4 and a second piston chamber 22, the diaphragm 33 includes a first diaphragm 6 and a second diaphragm 20, the water inlet check valve 32 includes a first water inlet check valve 5 and a second water inlet check valve 21, and the water outlet check valve 30 includes a first water outlet check valve 3 and a second water outlet check valve 23.

The first piston chamber 4, the first diaphragm 6, the first inlet check valve 5, and the first outlet check valve 3 are components in the first pressurizing assembly, and the cam 1001 on the first wobbler 10 acts on the first pressurizing assembly. The second piston chamber 22, the second diaphragm 20, the second water inlet check valve 21, and the second water outlet check valve 23 are components in the second pressurizing assembly, and the cam 1001 on the second wobbler 15 acts on the second pressurizing assembly.

Referring to fig. 10, diaphragm 33 includes a plurality of bosses 201, and accordingly, the cam of balance assembly 35 has a plurality of recesses 1002 (see fig. 7) that mate with the plurality of bosses 201 for coupling diaphragm 33 to cam 1001.

According to the embodiment of the application, the first pressurizing cavity group and the second pressurizing cavity group both comprise a plurality of pressurizing cavities, each pressurizing cavity is communicated with the water inlet hole 403 and the water outlet hole 404 of the piston chamber 31, and the plurality of pressurizing cavities are sequentially subjected to expansion and compression movement.

Compared with the pump heads of the conventional diaphragm booster pumps in fig. 1 and 2, the pump head 100 of the diaphragm booster pump provided by the present application is structurally improved from a cylindrical shape to a rectangular structure, so that the number of booster cavities is increased, and the flow rate of the diaphragm booster pump is increased.

According to the embodiment of the application, the number of the booster cavities in the first booster cavity group is the same as that of the booster cavities in the second booster cavity group.

The plurality of booster cavities of the first booster cavity group or the second booster cavity group do not interfere with each other.

The two pressurizing cavities with the phase difference of 180 degrees in the first pressurizing cavity group and the second pressurizing cavity group simultaneously carry out capacity expansion and compression movement, and the generated resultant force is zero and the resultant moment is balanced, so that the purposes of shock absorption and noise reduction of the diaphragm pressurizing pump are achieved. Here, the phase difference of 180 ° may be understood as two pressurizing chambers corresponding to the first pressurizing chamber group and the second pressurizing chamber group in the radial direction of the drive shaft 13.

According to the embodiment of the application, the cams with the phase difference of 180 degrees on the balance wheel assembly complete one approaching and departing cycle along the axial direction of the driving shaft every time the driving shaft 13 rotates one circle, and the pressurizing cavity completes one expansion and compression cycle.

According to an embodiment of the application, the pump head 100 further comprises a first end cap 1 and a second end cap 25.

A first water inlet cavity and a first water outlet cavity are formed between the first end cover 1 and the piston chamber 31 of the first pressurizing assembly, the first water inlet cavity is communicated with a water inlet hole 403 of the piston chamber 31 of the first pressurizing assembly, and the first water outlet cavity is communicated with a water outlet hole 404 of the piston chamber 31 of the first pressurizing assembly; a second water inlet cavity and a second water outlet cavity are formed between the second end cover 25 and the piston chamber 31 of the second pressurizing assembly, the second water inlet cavity is communicated with the water inlet hole 403 of the piston chamber 31 of the second pressurizing assembly, and the second water outlet cavity is communicated with the water outlet hole 404 of the piston chamber 31 of the second pressurizing assembly.

The first end cap 1 and its corresponding piston chamber 31 are sealingly connected by a sealing ring 2. The second end cap 25 is sealingly connected to its corresponding piston chamber 31 by means of a sealing ring 24.

According to an embodiment of the present application, the pump head 100 further comprises a first and a second pendulum wheel mount 9, 16.

The first swinging wheel seat 9 comprises a water inlet 904, a water outlet 905, a first water inlet channel 902 and a first water outlet channel 903, wherein the water inlet 904 is communicated with the first water inlet channel 902, the first water inlet channel 902 is communicated with the first water inlet cavity, the water outlet 905 is communicated with the first water outlet channel 903, and the first water outlet channel 903 is communicated with the first water outlet cavity; the second pendulum wheel base 16 has a second water inlet passage 1602 and a second water outlet passage 1603. The piston chamber includes a third water inlet passage 401 and a third water outlet passage 402.

The first water inlet channel 902 and the second water inlet channel 1602 are communicated with the third water inlet channel 401 of each piston chamber, so that the first water inlet cavity is communicated with the second water inlet cavity, and the first water outlet channel 903 and the second water outlet channel 1603 are communicated with the third water outlet channel 402 of each piston chamber, so that the first water outlet cavity is communicated with the second water outlet cavity.

Each of the first balance wheel base 9 and the second balance wheel base 16 has a plurality of balance wheel holes 36 for restricting the plurality of cams 1001 on the first balance wheel 10 and the second balance wheel 15 from reciprocating in the axial direction of the drive shaft 13. The balance hole 36 includes a first balance hole 901 and a second balance hole 1601. The first balance wheel seat 9 has a first balance wheel hole 901, and the second balance wheel seat 16 has a second balance wheel hole 1601.

The first end cover 1 and the first swinging wheel seat 9 are connected in a sealing mode through a sealing ring 7. The corresponding first end cover 1 and the first swinging wheel seat 9 at the top end of the driving shaft 13 are connected in a sealing way through a sealing ring 8. The first pendulum wheel seat 9 and the second pendulum wheel seat 16 are also in sealed connection, the peripheries of the first water inlet channel 902 and the second water inlet channel 1602, the peripheries of the first water outlet channel 903 and the second water outlet channel 1603 are in sealed connection through a sealing ring 17, and the peripheries of the second end cover 25 and the second pendulum wheel seat 16 are in sealed connection through a sealing ring 18. The center of the second swing wheel seat is provided with a shaft hole 1604 of the driving shaft. The second end cap 25 and the second pendulum wheel base 16, which are disposed around the axial hole 1604, are sealingly connected by a sealing ring 19.

Eccentric assembly 12 is fixed to drive shaft 13, and balance assembly 35 is rotatably mounted on eccentric assembly 12 via bearing 34. The bearing 34 comprises a first bearing 11 and a second bearing 14, the first bearing 11 being connected between the first balance 10 and the first eccentric 1201. A second bearing 14 is connected between the second balance 15 and the second eccentric 1202.

The flow process of the water path: source water enters the pump head 100 from the water inlet 904, enters the first water inlet cavity and the second water inlet cavity, enters the pressurizing cavity through the water inlet hole 403 of the pressurizing cavity provided with the water inlet check valve 32 when the pressurizing cavity is expanded, is discharged out of the pressurizing cavity through the water outlet hole 404 of the pressurizing cavity provided with the water outlet check valve 30 when the pressurizing cavity is compressed, enters the first water outlet cavity and the second water outlet cavity and is communicated through the water outlet channel, and finally is discharged out of required pressurizing water through the water outlet 905.

According to an example embodiment of the present application, the present application discloses a diaphragm booster pump, including: the pump head 100 as above; a motor coupled to the drive shaft 13 of the pump head 100.

The working process of the diaphragm booster pump is as follows:

the motor drives the driving shaft 13 to rotate, the driving shaft 13 drives the eccentric assembly 12 to eccentrically rotate, the cam 1001 of the balance wheel assembly 35 is mounted in the balance wheel hole 36 of the balance wheel seat and cannot rotate, and only can do reciprocating motion along the axial direction of the driving shaft 13, the eccentric rotation of the eccentric assembly 12 drives the cam 1001 of the balance wheel assembly 35 to do reciprocating motion along the axial direction, the cam 1001 on the balance wheel assembly 35 is connected with the diaphragm 33, and the cam 1001 on the balance wheel assembly 35 drives the deformation area of the diaphragm 33 to extrude towards the piston chamber 31 or expand away from the piston chamber 31 along the reciprocating motion along the axial direction, so that the pressurizing cavity does compression motion or expansion motion, and the required pressurizing water is produced.

According to an example embodiment of the present application, a water treatment apparatus includes the pump head 100 as above or the diaphragm booster pump as above.

According to an example embodiment of the present application, there is disclosed a method for controlling damping and noise reduction of a diaphragm booster pump, comprising:

a driving shaft 13 of the diaphragm booster pump drives the first eccentric wheel 1201 and the second eccentric wheel 1202 to rotate eccentrically simultaneously;

the first eccentric 1201 drives the cam 1001 on the first balance 10 and the second eccentric 1202 drives the cam 1001 on the second balance 15 to swing along the axial direction of the driving shaft 13;

the two cams 1001 with a phase difference of 180 ° on the first balance 10 and the second balance 15 oscillate in opposite directions and simultaneously move closer to or away from each other, so that the resultant force generated by the oscillation of the two cams 1001 with a phase difference of 180 ° is zero. Here, the phase difference of 180 ° is understood to mean two cams corresponding to one cam on the first balance 10 and one cam on the second balance 15 in the radial direction of the drive shaft 13.

The cams 1001 of the first balance 10 and the second balance 15 are respectively connected with the diaphragm 33, and the cams 1001 reciprocate along the axial direction of the driving shaft 13 to drive the deformation area of the diaphragm 33 to extrude towards the piston chamber 31 or expand away from the piston chamber 31, so that the pressurizing cavity performs compression movement or expansion movement.

According to the embodiment of the present application, when the deformation region of the diaphragm 33 is expanded away from the piston chamber 31, the pressurizing cavity performs expansion movement, the water inlet check valve 32 is opened, and water is sucked into the pressurizing cavity through the water inlet 403.

According to the embodiment of the present application, when the deformation region of the diaphragm 33 is pressed toward the piston chamber 31, the pressurizing cavity performs a compressing motion, the outlet check valve 30 is opened, and the pressurized water is discharged from the pressurizing cavity through the outlet hole 404.

Finally, it should be noted that: although the present disclosure has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims (10)

1. An eccentric assembly of a diaphragm booster pump, comprising:

an eccentric assembly comprising a first eccentric connected to a second eccentric, the eccentric direction of the first eccentric being parallel to the eccentric direction of the second eccentric, wherein,

the eccentric angles of the first eccentric wheel and the second eccentric wheel are the same and are within the range of 0.5-10 degrees.

2. The eccentric assembly of claim 1, wherein the eccentric angles of the first eccentric and the second eccentric are the same and are in the range of 1 ° to 5 °.

3. A drive section of a diaphragm booster pump, comprising:

the eccentric assembly of any of claims 1-2;

a drive shaft;

and the balance wheel assembly comprises at least one pair of balance wheels, the at least one pair of balance wheels are arranged on the eccentric assembly, and the driving shaft drives the eccentric assembly to rotate, so that the cams with phases different by 180 degrees arranged on each pair of balance wheels do opposite movement along the axial direction of the driving shaft.

4. The transmission according to claim 3, characterized in that said at least one pair of balances comprises:

the first balance wheel is mounted on the first eccentric wheel, the second balance wheel is mounted on the second eccentric wheel, and when the driving shaft drives the eccentric assembly to rotate, the cams with the phase difference of 180 degrees on the first balance wheel and the second balance wheel approach or depart from each other along the axial direction of the driving shaft.

5. The transmission according to claim 4, wherein a plurality of cams are provided on each of the first balance and the second balance, the cams provided on the first balance and the cams provided on the second balance radially corresponding to each other along the drive shaft.

6. The transmission portion according to claim 4, wherein when the eccentric assembly rotates, the resultant force generated by upward swinging along the axis of the driving shaft between the cams corresponding to the first balance wheel and the second balance wheel with a phase difference of 180 ° is zero and is in resultant moment balance.

7. The transmission according to claim 5, characterized in that the number of cams provided on both the first balance and the second balance is the same, said number of cams being 4.

8. The drive according to claim 4, wherein the cams of the balance assembly are 180 ° out of phase for each revolution of the drive shaft to complete one cycle of approaching and moving away in the axial direction of the drive shaft.

9. A pump head of a diaphragm booster pump, comprising:

an eccentric assembly according to any of claims 1 to 2 or a drive according to any of claims 3 to 8.

10. A diaphragm booster pump comprising a pump head according to claim 9.

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