CN117212093A - Plunger pump - Google Patents

Abstract

The utility model relates to a pump technical field especially relates to a plunger pump, including base and motor, be provided with first pump body and second pump body on the base, the flow of first pump body unit area equals the flow of second pump body unit area, the motor includes first motor and second motor, first pump body is connected with first motor, and the second pump body is connected with the second motor, the power of first motor less than or equal to second motor, first pump body is provided with the feed liquor passageway, the one end of feed liquor passageway is provided with public inlet, and the second pump body is provided with the drain passageway, the one end of drain passageway is provided with public outlet, the feed liquor passageway sets up in the one side of keeping away from first motor, the drain passageway sets up in the one side of keeping away from the second motor, and liquid gets into by public inlet and flows.

Description

Plunger pump

Technical Field

The disclosure relates to the technical field of pumps, and in particular relates to a plunger pump.

Background

A pump is a machine for delivering or pressurizing a liquid, and is an energy conversion device for converting mechanical energy and fluid pressure energy into each other, and is generally used for outputting high-pressure fluid. It transmits mechanical energy or other external energy of prime mover to liquid to increase energy of liquid, and is mainly used for conveying liquid including water, oil, acid-alkali liquor, emulsion, suspension emulsion and liquid metal, etc. and can also be used for conveying liquid, gas mixture and liquid containing suspended solid matter.

The plunger pump is one kind of pump and is one important device of hydraulic system, and it makes the volume of sealed work cavity change to realize oil sucking and pressing. The plunger pump is powered by a motor, a speed reducer is driven to rotate through a drum-shaped gear coupling, and a crankshaft is driven to rotate through speed reduction of the speed reducer. The rotary motion is converted into reciprocating motion of the cross head and the plunger by a crank-link mechanism. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow adjustment and the like, and is widely applied to occasions requiring high pressure, high flow and flow adjustment, such as hydraulic presses, engineering machinery and ships.

In actual work, because working conditions faced by engineering machinery are complex, two or more oil ways are often needed in a hydraulic system to realize hydraulic control, and therefore, a power element in the hydraulic system often adopts a double-pump serial structure, namely, two single plunger pumps are connected in series. The Chinese patent with application number 202211627486.2 discloses a compact double variable plunger pump, which comprises a front pump and a rear pump; the front pump and the rear pump are connected into a whole through an intermediate stationary phase in a mode that the bottoms are opposite, a central through hole is formed in the intermediate body along the axis in a penetrating way, and the intermediate body is formed with a front end positioning table board, a front end positioning cavity, a rear end positioning table board and a rear end positioning cavity; the bottom surface of the front pump shell of the front pump is matched with the front end positioning table top of the intermediate body in a sealing and press-fitting way, and the front pump oil distribution disc of the front pump is press-fitted in the front end positioning cavity of the intermediate body; the bottom surface of the rear pump shell of the rear pump is matched with the rear end positioning table surface of the intermediate body in a sealing and press-fitting manner, and the rear pump oil distribution disc of the rear pump is press-fitted in the rear end positioning cavity of the intermediate body; the intermediate body is formed with a common oil inlet, a front oil outlet and a rear oil outlet. However, the compact double variable plunger pump has a complex structure, is inconvenient to move and carry, and brings certain difficulty to later maintenance.

Disclosure of Invention

Aiming at the defects or problems in the prior art, the present disclosure provides a plunger pump, which has a compact structure and is convenient to use and maintain.

The technical scheme adopted by the present disclosure for solving the technical problems is as follows: the utility model provides a plunger pump, includes base and motor, be provided with first pump body and second pump body on the base, the flow of first pump body unit area equals the flow of second pump body unit area, the motor includes first motor and second motor, first pump body is connected with first motor, and the second pump body is connected with the second motor, the power of first motor less than or equal to second motor, first pump body is provided with the feed liquor passageway, the one end of feed liquor passageway is provided with public inlet, and the second pump body is provided with the drain passageway, the one end of drain passageway is provided with public liquid outlet, the feed liquor passageway sets up in the one side of keeping away from first motor, the drain passageway sets up in the one side of keeping away from the second motor, and liquid gets into by public inlet and flows out.

As a preferred embodiment, the first pump body is provided with a first channel, the liquid inlet channel is communicated with the first channel, one end of the liquid outlet channel, which is far away from the public liquid outlet, is provided with a second channel, and the first channel is spliced with the second channel.

As a preferred embodiment, a first valve is arranged at the joint of the liquid outlet channel and the second channel, the first valve controls the communication or blockage of the joint of the liquid outlet channel and the second channel, when the first valve is opened, the joint of the liquid outlet channel and the second channel is communicated, and liquid directly enters the liquid outlet channel from the second channel; when the first valve is closed, the joint of the liquid outlet channel and the second channel is blocked, and liquid enters the liquid outlet channel after entering the second pump body from the second channel.

As a preferred embodiment, the first channel is connected with a solenoid valve sensor, and the solenoid valve sensor is used for sensing whether the liquid of the first pump body enters the first channel. The setting of solenoid valve inductor is convenient for help the user to know the behavior and the service condition of first pump body, when serial plunger pump can not go out water, can help the user to get rid of the trouble.

As a preferred embodiment, the first pump body comprises a first end cap arranged on a side remote from the first motor, the inlet channel being arranged at least partially on the first end cap, the first channel being arranged at least partially on the first end cap.

As a preferred embodiment, the first pump body is provided with a first pump cavity, a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet are both arranged close to the first end cover, the first liquid inlet is communicated with the liquid inlet channel, the first liquid outlet is communicated with the first channel, a first plunger is arranged in the first pump cavity, the first plunger reciprocates in the first pump cavity under the driving of the first motor, and when the first plunger moves towards the direction of the first motor, liquid enters the first liquid inlet from the liquid inlet channel, and liquid enters the first pump cavity; when the first plunger moves towards the direction of the first end cover, liquid entering the first pump cavity is compressed to enter the first liquid outlet, then enters the first channel from the first liquid outlet, and then enters the second channel.

As a preferred embodiment, the second pump body comprises a second end cover, the second end cover is arranged on one side far away from the second motor, the liquid outlet channel is at least partially arranged on the second end cover, and the second channel is at least partially arranged on the second end cover.

As the preferred implementation, the second pump body is provided with second pump chamber, second inlet and second liquid outlet, the second inlet is close to the second end cover setting, the second liquid outlet sets up the top at the second end cover, second inlet and second passageway intercommunication, second liquid outlet and liquid passageway intercommunication, be provided with the second plunger in the second pump chamber, the second plunger reciprocates in the second pump chamber under the drive of second motor, and when first valve is closed, the second plunger moves to the direction of second motor under the drive of second motor, and the liquid of second passageway gets into the second pump chamber by the second inlet, and the second plunger moves to the direction of second end cover, and the liquid of getting into the second pump chamber is compressed and gets into the second liquid outlet, then gets into the liquid passageway by the second liquid outlet, is discharged by public liquid outlet again.

As a preferred embodiment, a third channel is arranged between the second liquid outlet and the liquid outlet channel, the third channel is at least partially arranged on the second end cover, and the liquid of the second liquid outlet enters the third channel first and then enters the liquid outlet channel through the third channel.

As a preferred embodiment, the number of the second pump cavities is three, and each pump cavity corresponds to one second liquid inlet and one second liquid outlet respectively.

As a preferred embodiment, the plunger pump is provided with a transmission mechanism, the transmission mechanism comprises a driving gear, a driven gear and a cam, the driving gear is meshed with the driven gear, a driving shaft of the motor is connected with the driving gear, the motor drives the driving gear to rotate, and then the driven gear is driven to rotate, the cam is clamped with the driven gear, the rotation of the driven gear drives the cam to rotate, and the rotation of the cam drives the plunger to reciprocate.

In a preferred embodiment, the cam is provided with a first plane bearing, one end of the plunger is in contact with the first plane bearing, the first plane bearing moves along with the rotation of the cam, and the first plane bearing drives the plunger to reciprocate.

As a preferred embodiment, a first deep groove ball bearing is connected to the side of the driven gear away from the cam.

As a preferred embodiment, a connecting shaft is arranged on one side of the driven gear, and the first deep groove ball bearing is in interference fit with the connecting shaft.

Further, one side of the driven gear, which is close to the first deep groove ball bearing, is provided with a concave, an annular convex block is arranged on the concave, the connecting shaft is arranged on the annular convex block, the first deep groove ball bearing comprises a large annular structure and a small annular structure, the large annular structure is arranged outside the small annular structure, and the outer diameter of the annular convex block is larger than or equal to the outer diameter of the small annular structure.

As a preferred implementation mode, the other side of the driven gear is provided with a groove, the inner peripheral wall of the groove is provided with a plurality of limit lugs, one side of the cam, which is close to the driven gear, is provided with a first annular bulge, the first annular bulge is provided with a plurality of second clamping grooves, and the second clamping grooves are matched with the limit lugs to connect the cam with the driven gear.

As a preferred embodiment, the height of the first annular protrusion is gradually reduced or gradually increased in the radial direction.

As a preferred embodiment, the cam includes a first portion and a second portion, the first portion and the second portion are integrally formed, the first portion is an annular structure disposed on the second portion, an outer diameter of the annular structure is smaller than an outer diameter of the first annular protrusion, and the first annular protrusion is disposed on the second portion.

As the preferred embodiment, the first plane bearing comprises a first annular part, a second annular part and a plurality of balls, wherein the balls are uniformly distributed between the first annular part and the second annular part, one side surface of the first annular part is attached to the second part of the cam, the inner diameter of the first annular part is larger than or equal to the outer diameter of the annular structure, and the inner diameter of the second annular part is larger than the outer diameter of the annular structure.

As a preferred embodiment, a second deep groove ball bearing is arranged on the driving shaft of the motor.

Compared with the existing product, the first pump body and the second pump body share the same base, so that the plunger pump is more compact in structure and convenient to move and maintain; the two pumps connected in series are only provided with one common liquid inlet and one common liquid outlet, so that the arrangement of the pipelines of the hydraulic system of the whole pump is simplified, and the volume is smaller; the first pump body and the second pump body respectively correspond to the independent motors, the requirement on the power of the single motor is relatively low, the loss during use is small, and the energy is saved.

Drawings

The application will be described in further detail below in connection with the drawings and the preferred embodiments, but it will be appreciated by those skilled in the art that these drawings are drawn for the purpose of illustrating the preferred embodiments only and thus should not be taken as limiting the scope of the application. Moreover, unless specifically indicated otherwise, the drawings are merely schematic representations, not necessarily to scale, of the compositions or constructions of the described objects and may include exaggerated representations.

FIG. 1 is one of the schematic structural views of a plunger pump of the present disclosure;

FIG. 2 is a second schematic diagram of a plunger pump according to the present disclosure;

FIG. 3 is an exploded view of a plunger pump of the present disclosure;

FIG. 4 is an enlarged view of a portion of the present disclosure at A in FIG. 3;

FIG. 5 is a cross-sectional view of a plunger pump of the present disclosure;

FIG. 6 is a schematic structural view of the transmission of the present disclosure;

FIG. 7 is a cross-sectional view of the transmission of the present disclosure;

FIG. 8 is a schematic view of the first planar bearing and cam connection of the present disclosure;

FIG. 9 is a cross-sectional view of a first planar bearing of the present disclosure coupled to a cam;

FIG. 10 is a schematic view of the structure of the cam of the present disclosure;

FIG. 11 is a schematic structural view of a first planar bearing of the present disclosure;

FIG. 12 is one of the schematic structural views of the driven gear of the present disclosure;

fig. 13 is a second schematic structural view of the driven gear of the present disclosure.

Reference numerals illustrate:

1. a first motor; 2. a second motor; 3. a first pump body; 4. a second pump body; 5. a common liquid inlet; 6. a liquid inlet channel; 7. a common liquid outlet; 8. a liquid outlet channel; 9. a first channel; 10. a second channel; 11. a first end cap; 12. a second end cap; 13. a third channel; 14. a first valve; 15. a base; 16. a second liquid inlet; 17. a first one-way valve; 18. a second one-way valve; 100. a drive gear; 200. a driven gear; 300. a first planar bearing; 400. a cam; 500. a drive shaft; 600. a second deep groove ball bearing; 700. a first deep groove ball bearing; 800. a plunger; 201. concave; 202. an annular bump; 203. a connecting shaft; 204. a groove; 205. a limit bump; 301. a first ring member; 302. a second ring member; 303. a ball; 401. a first portion; 402. a second portion; 403. and a second clamping groove.

Detailed Description

In order to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present disclosure.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present application.

Referring to fig. 1-3, an embodiment of the disclosure provides a plunger pump, including a base 15 and a motor, be provided with first pump body 3 and second pump body 4 on the base 15, the flow of first pump body 3 unit area equals the flow of second pump body 4 unit area, the motor includes first motor 1 and second motor 2, first pump body 3 is connected with first motor 1, and second pump body 4 is connected with second motor 2, the power of first motor 1 is less than or equal to second motor 2, first pump body 3 is provided with intake channel 6, the one end of intake channel 6 is provided with public inlet 5, second pump body 4 is provided with out liquid passageway 8, the one end of out liquid passageway 8 is provided with public outlet 7, intake channel 6 sets up in the one side of keeping away from first motor 1, out liquid passageway 8 sets up in the one side of keeping away from second motor 2, and liquid is got into by public inlet 5 and is flowed out by public outlet 7.

Specifically, be provided with first passageway 9 on the first pump body 3, feed liquor passageway 6 and first passageway 9 intercommunication, the one end that public liquid outlet 7 was kept away from to liquid outlet 8 is provided with second passageway 10, and first passageway 9 and second passageway 10 peg graft, and the mode of pegging graft makes the connection simple and reliable, easy to assemble and dismantlement and later maintenance. The first pump body 3 and the second pump body 4 share the base 15, and the two pumps connected in series are only provided with the public liquid inlet 5 and the public liquid outlet 7, so that the arrangement of the whole pump hydraulic system pipeline is simplified, the size of the plunger pump is smaller, the structure is more compact, and the plunger pump is convenient to move and carry. When the high-pressure liquid is required to flow out, the liquid is pressurized twice by the first pump body 3 and the second pump body 4 in sequence, so that the high-pressure liquid has higher pressure and can meet the requirement of a cleaning machine on larger impact force; in addition, each pump body corresponds to an independent motor, the power requirement on the single motor is relatively small, the pump body can be opened singly or in double when in use, the relative loss is small when in use, and the pump body is more energy-saving. When the first motor 1 is a dc motor, the battery is used to supply power, the second motor 2 is an ac motor, and the ac (mains supply) is used to supply power, and when the two motors work together, a higher pressure can be achieved with a smaller external current. It will be appreciated that the base 15 may also be provided with a third pump body, which is connected to the third motor, and the specific number of pump bodies is not specifically limited herein.

In particular, the first channel 9 is connected to a solenoid sensor for sensing whether the liquid of the first pump body 3 enters the first channel 9. The electromagnetic valve sensor is convenient for helping a user to know the working condition and the use state of the first pump body 3, and when the serial plunger pump cannot discharge water, the electromagnetic valve sensor can help the user to find faults in time and remove corresponding faults in time.

In an embodiment of the disclosure, a first valve 14 is disposed at a connection portion between the liquid outlet channel 8 and the second channel 10, the first valve 14 controls communication or blockage of the connection portion between the liquid outlet channel 8 and the second channel 10, when the first valve 14 is opened, the connection portion between the liquid outlet channel 8 and the second channel 10 is communicated, and liquid directly enters the liquid outlet channel 8 from the second channel 10, which is suitable for non-high pressure water, such as: garden, green belt watering, etc.; when the first valve 14 is closed, the connection between the liquid outlet channel 8 and the second channel 10 is blocked, and the liquid enters the liquid outlet channel 8 from the second channel 10 after entering the second pump body 4, and the situation is suitable for high-pressure water, such as: cleaning a road, washing vehicles and the like. The provision of the first valve 14 enables the tandem plunger pump to be more functional and to be used in a wider range of applications. The first valve 14 may be a solenoid valve, or may be another kind of on-off valve.

In an embodiment of the present disclosure, the first pump body 3 comprises a first end cap 11, the first end cap 11 being arranged on a side remote from the first motor 1, the inlet channel 6 being at least partially arranged on the first end cap 11, the first channel 9 being at least partially arranged on the first end cap 11. The first pump body 3 is provided with a first pump cavity, a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet are both arranged close to the first end cover 11, the first liquid inlet is communicated with the liquid inlet channel 6, the first liquid outlet is communicated with the first channel 9, a first plunger is arranged in the first pump cavity, the first plunger reciprocates in the first pump cavity under the driving of the first motor 1, and when the first plunger moves towards the direction of the first motor 1, liquid enters the first liquid inlet from the liquid inlet channel 6, and the liquid enters the first pump cavity; when the first plunger moves in the direction of the first end cap 11, liquid entering the first pump chamber is compressed into the first liquid outlet, then enters the first channel 9 from the first liquid outlet, and then enters the second channel 10.

Further, the second pump body 4 includes a second end cover 12, the second end cover 12 is disposed at a side far from the second motor 2, the liquid outlet channel 8 is at least partially disposed on the second end cover 12, and the second channel 10 is at least partially disposed on the second end cover 12. The second pump body 4 is provided with a second pump cavity, a second liquid inlet 16 and a second liquid outlet, the second liquid inlet 16 is close to the second end cover 12 and arranged, the second liquid outlet is arranged above the second end cover 12, the second liquid inlet 16 is communicated with the second channel 10 and is communicated with the liquid outlet channel 8, a second plunger is arranged in the second pump cavity and reciprocates in the second pump cavity under the driving of the second motor 2, when the first valve 14 is closed, the second plunger moves towards the direction of the second motor 2 under the driving of the second motor 2, liquid in the second channel 10 enters the second pump cavity from the second liquid inlet 16, the second plunger moves towards the direction of the second end cover 12, the liquid entering the second pump cavity is compressed to enter the second liquid outlet, then enters the liquid outlet channel 8 from the second liquid outlet, and then is discharged from the public liquid outlet 7.

Referring to fig. 3 to 4 together, it should be noted that, in order to ensure that the unit area of the second pump body 4 has more flow, there are three second pump chambers, each of which corresponds to one second liquid inlet 16 and one second liquid outlet, and three second pump chambers are respectively provided with three second plungers. The first pump body 3 is provided with at least one first pump chamber and one first plunger, and the number of first pump chambers specifically provided in the first pump body 3 is not limited here.

Further, a third channel 13 is arranged between the second liquid outlet and the liquid outlet channel 8, the third channel 13 is at least partially arranged on the second end cover 12, and the liquid of the second liquid outlet firstly enters the third channel 13 and then enters the liquid outlet channel 8 through the third channel 13.

If a user needs to wash a car, high-pressure water is needed at the moment, liquid enters the liquid inlet channel 6 from the common liquid inlet 5, flows to the second channel 10 from the first channel 9 through pressurization of the first pump body 3, flows to the second pump body 4 from the second channel 10, flows out from the third channel 13 through pressurization of the second pump body 4, and is finally discharged from the common liquid outlet 7. After the liquid is pressurized twice by the first pump body 3 and the second pump body 4 in sequence, the liquid has higher pressure.

If the user needs to water flowers, the first valve 14 is opened to enable the second channel 10 to be communicated with the liquid outlet channel 8, liquid enters the liquid inlet channel 6 from the common liquid inlet 5, flows to the second channel 10 from the first channel 9 after being pressurized by the first pump body 3, and then flows to the liquid outlet channel 8 directly from the second channel 10 to be discharged. The pump body is provided with a switch, the switch is divided into three gears, and the first gear is the first pump body 3 which works independently and can be selected when flowers are poured; the second gear is that the second pump body 4 works independently, and when the second pump body 4 works independently, liquid needs to enter the second pump body 4 through the first pump body 3; the third gear is that the first pump body 3 and the second pump body 4 work simultaneously, the pressure of liquid is the largest at this moment, and the third gear can be selected during car washing.

Referring to fig. 3 to 5, it should be noted that, in order to ensure the reliability of the operation of the plunger pump, the second liquid inlet 16 is provided with a first check valve 17, and the second liquid outlet is provided with a second check valve 18; when the plunger retreats, the corresponding pump cavity generates negative pressure, at the moment, the first one-way valve 17 in the second liquid inlet 16 corresponding to the pump cavity is opened, and liquid enters the corresponding pump cavity from the second liquid inlet 16; when the plunger piston advances and compresses, the liquid in the pump cavity is compressed, at the moment, the first one-way valve 17 is in a closed state, the liquid is extruded by the plunger piston to enable the second one-way valve 18 of the second liquid outlet to be opened, and the liquid is discharged from the second liquid outlet; the first liquid outlet and the first liquid inlet are also provided with a second one-way valve 18 and a first one-way valve 17, respectively, which are not described here again.

Referring to fig. 6 to 7, in an embodiment of the disclosure, a plunger pump is provided with a transmission mechanism, the transmission mechanism includes a driving gear 100, a driven gear 200 and a cam 400, the driving gear 100 is meshed with the driven gear 200, a driving shaft 500 of a motor is connected with the driving gear 100, the motor drives the driving gear 100 to rotate, and further drives the driven gear 200 to rotate, the cam 400 is of an oblique swash plate structure, the cam 400 is clamped with the driven gear 200, the rotation of the driven gear 200 drives the cam 400 to rotate, and the rotation of the cam 400 drives the plunger to reciprocate.

To reduce friction between the plunger 800 and the cam 400, the cam 400 is fitted with a first flat bearing 300, one end of the plunger 800 contacts the first flat bearing 300, the first flat bearing 300 moves with rotation of the cam 400, and the first flat bearing 300 drives the plunger 800 to reciprocate.

As shown in fig. 12 to 13, a first deep groove ball bearing 700 is connected to the driven gear 200 at a side away from the cam 400. Specifically, a connecting shaft 203 is disposed on one side of the driven gear 200, and the first deep groove ball bearing 700 is in interference fit with the connecting shaft 203. The driven gear 200 is provided with the indent 201 near one side of first deep groove ball bearing 700, is provided with annular lug 202 on the indent 201, and connecting axle 203 sets up on annular lug 202, and first deep groove ball bearing 700 includes big ring structure and little ring structure, and big ring structure sets up in the outside of little ring structure, and annular lug 202's external diameter is greater than or equal to little ring structure's external diameter. The provision of the annular projection 202 makes the driven gear 200 more economical in raw material and reduces processing costs.

It should be noted that, the other side of the driven gear 200 is provided with a groove 204, the inner peripheral wall of the groove 204 is provided with a plurality of limiting lugs 205, one side of the cam 400, which is close to the driven gear 200, is provided with a first annular protrusion, the first annular protrusion is provided with a plurality of second clamping grooves 403, the number and positions of the limiting lugs 205 and the second clamping grooves 403 are corresponding, and the second clamping grooves 403 are matched with the limiting lugs 205 to connect the cam 400 with the driven gear 200.

In particular, the height of the first annular projection gradually decreases or gradually increases in the radial direction. As shown in fig. 9, the cam 400 includes a first portion 401 and a second portion 402, the first portion 401 and the second portion 402 are integrally formed, the first portion 401 is an annular structure disposed on the second portion 402, an outer diameter of the annular structure is smaller than an outer diameter of the first annular protrusion, and the first annular protrusion is disposed on the second portion 402.

Referring to fig. 8 to 11, the first plane bearing 300 includes a first ring member 301, a second ring member 302, and a plurality of balls 303, wherein the balls 303 are uniformly distributed between the first ring member 301 and the second ring member 302, one side surface of the first ring member 301 is attached to a second portion 402 of the cam 400, an inner diameter of the first ring member 301 is equal to or larger than an outer diameter of the ring structure, and an inner diameter of the second ring member 302 is larger than the outer diameter of the ring structure. Preferably, the inner diameter of the first ring 301 is larger than the outer diameter of the ring structure, and when the inner diameter of the first ring 301 is larger than the outer diameter of the ring structure, a gap is formed between the first ring 301 and the ring structure, so that friction between the first plane bearing 300 and the cam 400 can be reduced. Because the plunger 800 contacts with the second ring member 302 and reciprocates under the driving of the second ring member 302, when the inner diameter of the second ring member 302 is larger than the outer diameter of the ring structure, a gap is formed between the second ring member 302 and the ring structure, and the plunger 800 may fall into the gap during the reciprocation, in addition, the second ring member 302 may shake, which affects the stability of the operation of the transmission mechanism. It should be noted that, when the transmission mechanism is in operation, the cam 400 drives the first ring member 301 to rotate, and the second ring member 302 may or may not rotate.

With continued reference to fig. 7, a second deep groove ball bearing 600 is preferably provided on the drive shaft 500 of the motor.

The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present application may be better understood. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims (15)

1. The utility model provides a plunger pump, its characterized in that, including base (15) and motor, be provided with first pump body (3) and second pump body (4) on base (15), the flow of first pump body (3) unit area equals the flow of second pump body (4) unit area, the motor includes first motor (1) and second motor (2), first pump body (3) are connected with first motor (1), second pump body (4) are connected with second motor (2), the power of first motor (1) is less than or equal to second motor (2), first pump body (3) are provided with feed liquor passageway (6), the one end of feed liquor passageway (6) is provided with public feed liquor mouth (5), and the one end of feed liquor passageway (8) is provided with public feed liquor mouth (7), feed liquor passageway (6) set up in the one side of keeping away from first motor (1), feed liquor passageway (8) set up in the one side of keeping away from second motor (2), by public feed liquor mouth (7) entering by public feed liquor mouth (7).

2. The plunger pump according to claim 1, wherein the first pump body (3) is provided with a first channel (9), the liquid inlet channel (6) is communicated with the first channel (9), one end of the liquid outlet channel (8) far away from the public liquid outlet (7) is provided with a second channel (10), and the first channel (9) is spliced with the second channel (10).

3. The plunger pump according to claim 2, characterized in that a first valve (14) is arranged at the junction of the liquid outlet channel (8) and the second channel (10), the first valve (14) controls the communication or blockage of the junction of the liquid outlet channel (8) and the second channel (10), when the first valve (14) is opened, the junction of the liquid outlet channel (8) and the second channel (10) is communicated, and liquid directly enters the liquid outlet channel (8) from the second channel (10); when the first valve (14) is closed, the joint of the liquid outlet channel (8) and the second channel (10) is blocked, and liquid enters the second pump body (4) from the second channel (10) and then enters the liquid outlet channel (8).

4. Plunger pump according to claim 2, characterized in that the first channel (9) is connected with a solenoid valve sensor for sensing whether liquid of the first pump body (3) enters the first channel (9).

5. Plunger pump according to claim 2 or 4, characterized in that the first pump body (3) comprises a first end cap (11), the first end cap (11) being arranged on the side remote from the first motor (1), the inlet channel (6) being arranged at least partly on the first end cap (11), the first channel (9) being arranged at least partly on the first end cap (11).

6. The plunger pump according to claim 5, wherein the first pump body (3) is provided with a first pump cavity, a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet are both arranged close to the first end cover (11), the first liquid inlet is communicated with the liquid inlet channel (6), the first liquid outlet is communicated with the first channel (9), a first plunger is arranged in the first pump cavity, the first plunger reciprocates in the first pump cavity under the driving of the first motor (1), and when the first plunger moves towards the direction of the first motor (1), liquid enters the first liquid inlet from the liquid inlet channel (6), and the liquid enters the first pump cavity; when the first plunger moves towards the first end cover (11), liquid entering the first pump cavity is compressed to enter the first liquid outlet, then enters the first channel (9) from the first liquid outlet, and then enters the second channel (10).

7. Plunger pump according to claim 6, characterized in that the second pump body (4) comprises a second end cap (12), the second end cap (12) being arranged on the side remote from the second motor (2), the outlet channel (8) being arranged at least partly on the second end cap (12), the second channel (10) being arranged at least partly on the second end cap (12).

8. The plunger pump according to claim 7, characterized in that the second pump body (4) is provided with a second pump cavity, a second liquid inlet (16) and a second liquid outlet, the second liquid inlet (16) is arranged close to the second end cover (12), the second liquid outlet is arranged above the second end cover (12), the second liquid inlet (16) is communicated with the second channel (10), the second liquid outlet is communicated with the liquid outlet channel (8), a second plunger is arranged in the second pump cavity, the second plunger reciprocates in the second pump cavity under the driving of the second motor (2), when the first valve (14) is closed, the second plunger moves towards the second motor (2) under the driving of the second motor (2), the liquid in the second channel (10) enters the second pump cavity through the second liquid inlet (16), the second plunger moves towards the second end cover (12), the liquid entering the second pump cavity is compressed into the second outlet, and then is discharged from the second outlet channel (7) through the liquid outlet channel (8).

9. Plunger pump according to claim 8, characterized in that a third channel (13) is arranged between the second liquid outlet and the liquid outlet channel (8), the third channel (13) is at least partially arranged on the second end cover (12), and the liquid of the second liquid outlet enters the third channel (13) first and then enters the liquid outlet channel (8) through the third channel (13).

10. The plunger pump according to claim 1, wherein the plunger pump is provided with a transmission mechanism, the transmission mechanism comprises a driving gear (100), a driven gear (200) and a cam (400), the driving gear (100) is meshed with the driven gear (200), a driving shaft (500) of a motor is connected with the driving gear (100), the motor drives the driving gear (100) to rotate and further drives the driven gear (200) to rotate, the cam (400) is clamped with the driven gear (200), the rotation of the driven gear (200) drives the cam (400) to rotate, and the rotation of the cam (400) drives the plunger (800) to reciprocate.

11. The plunger pump as set forth in claim 10, wherein the cam (400) is fitted with a first flat bearing (300), one end of the plunger (800) is in contact with the first flat bearing (300), the first flat bearing (300) moves with rotation of the cam (400), and the first flat bearing (300) drives the plunger (800) to reciprocate.

12. The plunger pump according to claim 11, wherein a first deep groove ball bearing (700) is connected to a side of the driven gear (200) remote from the cam (400); one side of the driven gear (200) is provided with a connecting shaft (203), and the first deep groove ball bearing (700) is in interference fit with the connecting shaft (203); one side of driven gear (200) near first deep groove ball bearing (700) is provided with indent (201), is provided with annular lug (202) on indent (201), and connecting axle (203) set up on annular lug (202), first deep groove ball bearing (700) are including big ring structure and little ring structure, big ring structure sets up the outside at little ring structure, the external diameter of annular lug (202) is greater than or equal to the external diameter of little ring structure.

13. The plunger pump according to claim 12, wherein a groove (204) is formed in the other side of the driven gear (200), a plurality of limiting lugs (205) are formed in the inner peripheral wall of the groove (204), a first annular protrusion is formed in one side, close to the driven gear (200), of the cam (400), a plurality of second clamping grooves (403) are formed in the first annular protrusion, and the second clamping grooves (403) are matched with the limiting lugs (205) to connect the cam (400) with the driven gear (200).

14. The plunger pump of claim 13, wherein the cam (400) comprises a first portion (401) and a second portion (402), the first portion (401) being integrally formed with the second portion (402), the first portion (401) being an annular structure disposed on the second portion (402), an outer diameter of the annular structure being smaller than an outer diameter of the first annular protrusion, the first annular protrusion being disposed on the second portion (402).

15. The plunger pump of claim 14, wherein the first planar bearing (300) comprises a first annular member (301), a second annular member (302) and a plurality of balls (303), the plurality of balls (303) are uniformly distributed between the first annular member (301) and the second annular member (302), one side surface of the first annular member (301) is attached to a second portion (402) of the cam (400), an inner diameter of the first annular member (301) is equal to or larger than an outer diameter of the annular structure, and an inner diameter of the second annular member (302) is larger than the outer diameter of the annular structure.