CN221120267U - Plunger pump - Google Patents

Abstract

The utility model discloses a plunger pump, which comprises an upper cover, a rotating shaft assembly, a swash plate assembly, a driving assembly and a plunger pump material assembly, wherein a rotating hole is formed in the upper cover, a limiting protrusion is arranged on the inner wall of the rotating hole in a protruding mode, the rotating shaft assembly comprises a first bearing and a rotating shaft, the first bearing is arranged in the rotating hole, the rotating shaft penetrates through an inner ring of the first bearing, the limiting protrusion is abutted to one end of the first bearing, the other end of the first bearing is limited on the rotating shaft, the swash plate assembly comprises a swash plate and a second bearing, the swash plate is connected to one end of the rotating shaft, the limiting protrusion is located between the swash plate and the first bearing, an inclined surface is arranged on the swash plate, two opposite ends of the second bearing are respectively abutted to the swash plate and the upper cover, the driving assembly is used for driving the rotating shaft to rotate, the plunger pump material assembly comprises a plunger rod, and the plunger rod is driven to move back and forth along the axial direction of the plunger rod when the inclined surface is used for rotating. The upper cover can limit the two-way axial direction of the swash plate, the operation reliability of the plunger pump is good, and the service life of the plunger pump is prolonged.

Description

Plunger pump

Technical Field

The utility model relates to the technical field of plunger pumps, in particular to a plunger pump.

Background

The plunger pump is an important device of a hydraulic system, and the plunger pump is widely applied to occasions requiring high pressure, large flow and flow regulation, and has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like.

The patent document with the application number 201220748276.4 discloses a swash plate type plunger pump transmission system, which comprises a cylinder body, a transmission shaft arranged in the cylinder body, a plunger rod, a swash plate and a first bearing used for supporting the transmission shaft, wherein the swash plate is fixed at one end of the transmission shaft, the plunger rod is in contact with the swash plate, a second bearing and a third bearing are respectively arranged at two sides of the swash plate, the second bearing is close to one side of the plunger rod, the third bearing is close to one side of the transmission shaft and is fixed on the cylinder body, and axial load is transmitted to the cylinder body by the aid of the third bearing, so that the load on the transmission shaft is reduced, and the service life of the swash plate type plunger pump is prolonged. In the swash plate type plunger pump transmission system, the swash plate, the first bearing and the third bearing are all positioned on the same side of the cylinder body, the cylinder body is limited in a unidirectional axial direction only to the swash plate, in the operation process of the plunger pump, the axial gap between the swash plate and the cylinder body is easy to change, the operation reliability of the plunger pump is poor, and the service life of the plunger pump is reduced.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the plunger pump, and the problems that in the existing plunger pump, a cylinder body only has unidirectional axial limitation on a swash plate, the axial clearance between the swash plate and the cylinder body is easy to change in the operation process of the plunger pump, the operation reliability of the plunger pump is poor, and the service life of the plunger pump is reduced are solved.

According to an embodiment of the present utility model, a plunger pump includes:

the upper cover is provided with a rotating hole, and the inner wall of the rotating hole is convexly provided with a limiting protrusion;

The rotating shaft assembly comprises a first bearing and a rotating shaft, the first bearing is arranged in the rotating hole, the rotating shaft penetrates through the inner ring of the first bearing, the limiting protrusion is abutted against one end of the first bearing, and the other end of the first bearing is limited on the rotating shaft;

The swash plate assembly comprises a swash plate and a second bearing, the swash plate is connected to one end of the rotating shaft, the limiting protrusion is located between the swash plate and the first bearing, one end of the swash plate, which is far away from the rotating shaft, is provided with an inclined plane inclined to the axial direction of the rotating shaft, and the opposite ends of the second bearing are respectively abutted against the swash plate and the upper cover;

The driving assembly is arranged on the upper cover, is connected to one end, far away from the sloping cam plate, of the rotating shaft and is used for driving the rotating shaft to rotate;

The plunger pump material assembly is connected with the upper cover and comprises a plunger rod, the plunger rod is abutted to the inclined plane, and the inclined plane is used for driving the plunger rod to move back and forth along the axial direction of the plunger rod to realize pumping when rotating.

The plunger pump provided by the embodiment of the utility model has at least the following beneficial effects:

The driving assembly drives the swash plate assembly to rotate through the rotating shaft assembly, and then the plunger pump assembly is driven to work. The upper cover is provided with a rotating hole, a limiting protrusion is arranged in the rotating hole in a protruding mode, the limiting protrusion is located between the swash plate and the first bearing, the limiting protrusion can limit the first bearing to move towards the direction close to the swash plate, one end, away from the limiting protrusion, of the first bearing is limited on the rotating shaft, and then the limiting protrusion can limit the rotating shaft to move towards the direction close to the swash plate. A second bearing is connected between the swash plate and the upper cover, so that the upper cover can limit the swash plate to move towards the direction close to the first bearing. The swash plate is connected with the rotating shaft, so that the upper cover, the rotating shaft assembly and the swash plate assembly form a whole, the upper cover can limit the swash plate in a bidirectional axial direction, an axial gap between the swash plate and the upper cover is not easy to change in the operation process of the plunger pump, the operation reliability of the plunger pump is good, and the service life of the plunger pump is prolonged.

According to some embodiments of the utility model, the plunger pump assembly comprises a base, the base is connected with the upper cover, a plunger cavity is arranged in the base, the plunger cavity is arranged in an open way near one end of the upper cover, a feeding channel and a discharging channel are further arranged on the base, the feeding channel and the discharging channel are both communicated to one end of the plunger cavity far away from the upper cover, the feeding channel is connected with a first one-way valve assembly, the discharging channel is connected with a second one-way valve assembly, one end of the plunger rod is slidably connected in the plunger cavity, and the other end of the plunger rod is exposed out of the plunger cavity and abuts against the inclined surface.

According to some embodiments of the utility model, the plunger pump assembly further comprises an elastic member, one end of the elastic member is mounted on the base, the other end of the elastic member abuts against the plunger rod, and the elastic member is used for pushing the plunger rod to abut against the inclined surface.

According to some embodiments of the utility model, the plunger cavity, the feed channel, the discharge channel and the plunger rod are provided in plurality, and the plurality of plunger cavities are arranged at intervals along the circumferential direction of the rotating shaft.

According to some embodiments of the utility model, an annular groove is provided in the plunger cavity, a seal is provided in the annular groove, and the seal is sleeved on the plunger rod.

According to some embodiments of the utility model, a communicating cavity is arranged in the base, one end of the communicating cavity, which is close to the upper cover, is provided with an opening end cover of the communicating cavity, a sealing block is arranged on the opening end cover of the communicating cavity, a discharging hole which is communicated with the communicating cavity is arranged on the base, the discharging channel is communicated with the communicating cavity, and the second one-way valve assembly is arranged in the communicating cavity.

According to some embodiments of the utility model, the plunger pump further comprises a pressure plate, the pressure plate is connected to one end, far away from the upper cover, of the base, a feeding hole is formed in the pressure plate and communicated with the feeding channel, and one end, far away from the base, of the feeding hole is in a chamfering arrangement.

According to some embodiments of the utility model, a third bearing is provided on the inclined surface, and the plunger rod abuts against a side of the third bearing away from the inclined surface.

According to some embodiments of the utility model, the first bearing is a rolling bearing, and the second bearing and the third bearing are both thrust bearings.

According to some embodiments of the utility model, the shaft is integrally formed with the swash plate.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic structural view of a plunger pump according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a plunger pump according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of an upper cover, a spindle assembly, a swash plate assembly and a plunger pump assembly of an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a rotary shaft and a swash plate of a plunger pump according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of the upper cover of the plunger pump according to the embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a base of a plunger pump according to an embodiment of the present utility model;

Reference numerals:

100. An upper cover; 110. a turning hole; 111. a limit protrusion; 120. a receiving groove; 121. a limit groove;

200. a spindle assembly; 210. a first bearing; 220. a rotating shaft; 221. a first fixing sleeve;

300. a swash plate assembly; 310. a swash plate; 311. an inclined plane; 320. a second bearing; 330. a third bearing;

400. A drive assembly;

500. A plunger pump assembly; 510. a plunger rod; 511. a second fixing sleeve; 520. a base; 521. a plunger cavity; 5211. a seal; 522. a feed channel; 523. a discharge channel; 524. a communication chamber; 525. a discharge port; 530. a first one-way valve assembly; 531. a one-way valve connecting block; 532. a first check valve spool; 533. a first check valve spring; 540. a second one-way valve assembly; 541. a second check valve spool; 542. a second check valve spring; 550. an elastic member; 560. a sealing block; 570. a plug;

600. a pressure plate; 610. and a feeding hole.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, 2, 3, 4 and 5, a plunger pump according to an embodiment of the present utility model includes a rotating shaft assembly 200 of an upper cover 100, a swash plate assembly 300, a driving assembly 400 and a plunger pump assembly 500. The upper cover 100 is provided with a rotation hole 110, and the inner wall of the rotation hole 110 is convexly provided with a limit protrusion 111. The rotating shaft assembly 200 includes a first bearing 210 and a rotating shaft 220, the first bearing 210 is installed in the rotating hole 110, the rotating shaft 220 is penetrated through an inner ring of the first bearing 210, the limiting protrusion 111 abuts against one end of the first bearing 210, and the other end of the first bearing 210 is limited on the rotating shaft 220. The swash plate assembly 300 includes a swash plate 310 and a second bearing 320, the swash plate 310 is connected to one end of the rotation shaft 220, the limit protrusion 111 is located between the swash plate 310 and the first bearing 210, one end of the swash plate 310 away from the rotation shaft 220 is provided with a slope 311, the slope 311 is disposed to be inclined to the rotation shaft 220 in an axial direction, and opposite ends of the second bearing 320 are respectively abutted against the swash plate 310 and the upper cover 100. The driving assembly 400 is mounted on the upper cover 100, the driving assembly 400 is connected to the end of the rotating shaft 220 away from the swash plate 310, and the driving assembly 400 is used for driving the rotating shaft 220 to rotate. The plunger pump assembly 500 is connected with the upper cover 100, the plunger pump assembly 500 comprises a plunger rod 510, the plunger rod 510 is abutted against the inclined surface 311, and the inclined surface 311 is used for driving the plunger rod 510 to move back and forth along the axial direction of the plunger rod 510 during rotation so as to realize pumping.

The driving assembly 400 drives the swash plate assembly 300 to rotate through the rotating shaft assembly 200, so as to drive the plunger pump assembly 500 to work. The upper cover 100 is provided with a rotating hole 110, a limiting protrusion 111 is arranged in the rotating hole 110 in a protruding mode, the limiting protrusion 111 is located between the swash plate 310 and the first bearing 210, the limiting protrusion 111 can limit the first bearing 210 to move towards the direction close to the swash plate 310, one end, away from the limiting protrusion 111, of the first bearing 210 is limited on the rotating shaft 220, and further the limiting protrusion 111 can limit the rotating shaft 220 to move towards the direction close to the swash plate 310. A second bearing 320 is coupled between the swash plate 310 and the upper cover 100 such that the upper cover 100 can restrict the swash plate 310 from moving in a direction approaching the first bearing 210. The swash plate 310 is connected with the rotating shaft 220, so that the upper cover 100, the rotating shaft assembly 200 and the swash plate assembly 300 form a whole, the upper cover 100 can axially limit the swash plate 310 in a bidirectional manner, in the operation process of the plunger pump, the axial clearance between the swash plate 310 and the upper cover 100 is not easy to change, the operation reliability of the plunger pump is good, and the service life of the plunger pump is prolonged.

The rotating shaft 220 is detachably sleeved with a first fixing sleeve 221, the first fixing sleeve 221 is abutted against one end, away from the limiting protrusion 111, of the first bearing 210, and the first fixing sleeve 221 is used for limiting one end, away from the limiting protrusion 111, of the first bearing 210 to the rotating shaft 220, so that the rotating shaft 220 is limited to axially move towards the direction close to the swash plate 310. The driving assembly 400 includes a driving motor and a decelerator, the driving motor is connected to the decelerator, and an output end of the decelerator is connected to the rotation shaft 220 through a coupling.

In some embodiments, referring to fig. 1, 2, 3, and 6, plunger pump assembly 500 includes a base 520, base 520 being coupled to upper cover 100. The base 520 is provided with a plunger cavity 521, one end of the plunger cavity 521, which is close to the upper cover 100, is provided with an opening, one end of the plunger rod 510 is slidably connected in the plunger cavity 521, and the other end of the plunger rod 510 is exposed out of the plunger cavity 521 and is abutted against the inclined surface 311. The base 520 is further provided with a feeding channel 522 and a discharging channel 523, the feeding channel 522 and the discharging channel 523 are both communicated to one end of the plunger cavity 521 far away from the upper cover 100, the feeding channel 522 is connected with a first one-way valve assembly 530, and the discharging channel 523 is connected with a second one-way valve assembly 540.

The driving assembly 400 drives the rotating shaft 220 to rotate, drives the swash plate 310 to rotate, drives the plunger rod 510 to move back and forth in the plunger cavity 521 through the inclined surface 311, and cooperates with the first check valve assembly 530 and the second check valve assembly 540 to realize the material suction and material pressing of the plunger cavity 521, so that materials can enter along the feeding channel 522 and then be discharged along the discharging channel 523.

The first check valve assembly 530 includes a check valve connection block 531, a first check valve spool 532, and a first check valve spring 533, the check valve connection block 531 being covered at one end of the feed passage 522 remote from the plunger chamber 521, and the check valve connection block 531 being provided with a through hole. The first check valve case 532 is movably mounted in the feeding channel 522, one end of the first check valve spring 533 is mounted in the feeding channel 522, the other end of the first check valve spring 533 abuts against the first check valve case 532, and the first check valve spring 533 is used for pushing the first check valve case 532 to block the through hole on the check valve connecting block 531.

The second check valve assembly 540 includes a second check valve core 541 and a second check valve spring 542, one end of the second check valve spring 542 is installed in the base 520, the other end of the second check valve spring 542 abuts against the second check valve core 541, and the second check valve spring 542 is used for pushing the second check valve core 541 to block one end of the discharge channel 523 away from the plunger cavity 521.

The driving assembly 400 drives the rotating shaft 220 to rotate, drives the swash plate 310 to rotate, and drives the plunger rod 510 to move back and forth in the plunger cavity 521 through the inclined surface 311. In the process of gradually moving up the plunger rod 510 (the plunger pump is placed vertically, the axial direction of the rotating shaft 220 is vertical, the axial direction of the plunger rod 510 is vertical, the driving assembly 400 is located at the uppermost part, the swash plate 310 is located above the plunger rod 510), the second check valve core 541 closes one end of the discharging channel 523 far away from the plunger cavity 521 under the action of the second check valve spring 542, and vacuum is formed in the channel cavity. At this time, the first check valve core 532 breaks through the action of the first check valve spring 533 due to the pressure difference, and the feeding passage 522 is opened to form a flow path, so that the material is sucked into the plunger cavity 521 at the lower end of the plunger rod 510. After the swash plate 310 rotates a certain angle, the contact of the swash plate 310 with the plunger rod 510 is changed from the ascending contact to the descending contact. The swash plate 310 continues to rotate, in the process that the plunger rod 510 gradually moves upwards, the first check valve core 532 closes the through hole on the check valve connecting block 531 under the action of the first check valve spring 533, the feeding channel 522 is closed, the second check valve core 541 overcomes the pressure of the second check valve spring 542, moves away from the end of the discharging channel 523 away from the plunger cavity 521, the discharging channel 523 is opened, and at this time, the material in the plunger cavity 521 can be discharged along the discharging channel 523.

In some embodiments, referring to fig. 1, 2, 3 and 6, plunger pump assembly 500 further includes an elastic member 550, one end of elastic member 550 being mounted on base 520, the other end of elastic member 550 abutting plunger rod 510, elastic member 550 being configured to urge plunger rod 510 against ramp 311. The elastic component includes a spring, the spring is sleeved on the plunger rod 510, a second fixing sleeve 511 is detachably sleeved on the plunger rod 510, one end of the spring is abutted on the base 520, and the other end of the spring is abutted on the second fixing sleeve 511. When the contact between the swash plate 310 and the plunger rod 510 is changed from the ascending contact to the descending contact, the swash plate 310 presses the plunger rod 510 to press the plunger rod 510 into the plunger chamber 521, and the second fixing sleeve 511 presses the spring. When the contact of the swash plate 310 with the plunger rod 510 is changed from the descending contact to the ascending contact, the spring pushes the second fixing sleeve 511, thereby pushing the plunger rod 510 upward so that the plunger rod 510 is maintained in contact with the swash plate 310.

In some embodiments, referring to fig. 1, 2, 3 and 6, a plurality of plunger chambers 521, a feed passage 522, a discharge passage 523 and a plunger rod 510 are provided, and a plurality of plunger chambers 521 are spaced apart along the circumference of the rotation shaft 220. The simultaneous operation of the plurality of plunger rods 510, in combination with the rotational speed control of the drive assembly 400, reduces the pulsation height of the pump flow. Can ensure continuous and uniform output of materials and improve production efficiency and quality.

In some embodiments, referring to fig. 1, 2, 3 and 6, an annular groove is provided in the plunger cavity 521, a seal 5211 is provided in the annular groove, and the seal 5211 is sleeved on the plunger rod 510. The provision of the seal 5211 ensures that the plunger rod 510 is able to produce a pressure change within the plunger chamber 521 as the plunger rod 510 moves back and forth within the plunger chamber 521, thereby allowing material to enter along the feed passage 522 and exit along the discharge passage 523.

In some embodiments, referring to fig. 1, 2, 3 and 6, a communication cavity 524 is disposed in the base 520, and the communication cavity 524 is disposed in an open manner near one end of the upper cover 100. The open end cap of the communication chamber 524 is provided with a sealing block 560. The base 520 is provided with a discharge hole 525, the discharge hole 525 is communicated with the communicating cavity 524, and the discharge channel 523 is communicated to the communicating cavity 524. The second check valve assembly 540 is mounted within the communication chamber 524 with one end of the second check valve spring 542 abutting the sealing block 560.

The discharging channel 523 comprises a first section and a second section, the first section is perpendicular to the second section, the first section can be formed by drilling along the radial direction of the base 520 from the outer surface of the base 520, and a plug 570 is arranged on the surface of the base 520 to seal. The second section may be drilled down the communication chamber 524, communicating with the first section. The communication cavity 524 and the sealing block 560 are arranged, so that the processing of the discharging channel 523 is facilitated, and the installation of the second one-way valve assembly 540 is facilitated. The axial direction of the feed passage 522 coincides with the axial direction of the plunger chamber 521, and the processing is convenient.

In some embodiments, referring to fig. 1, 2 and 3, the plunger pump further comprises a pressure plate 600, wherein the pressure plate 600 is connected to the end of the base 520 remote from the upper cover 100. The platen 600 is provided with a feeding hole 610, the feeding hole 610 is communicated with the feeding channel 522, and one end, far away from the base 520, of the feeding hole 610 is in chamfering arrangement. The chamfer sets up pan feeding hole 610, can ensure that the material gathers together in the one end of feed channel 522 that is kept away from plunger cavity 521. The plunger pump can be used for pumping glue, and pressure plate 600 can be pressed into the silica gel raw material barrel, and pressure plate 600 is sealed with the silica gel raw material barrel and is supplied with raw materials.

In some embodiments, referring to fig. 1, 2, 3, 4 and 5, the inclined surface 311 is provided with a third bearing 330, and the plunger rod 510 abuts against a side of the third bearing 330 away from the inclined surface 311. By providing third bearing 330, friction between plunger rod 510 and swash plate 310 may be reduced, ensuring that swash plate 310 drives plunger rod 510 to move back and forth within plunger chamber 521 more smoothly. The upper cover 100 is provided with a receiving groove 120 near one end of the plunger pump assembly 500, the rotation hole 110 is communicated to the bottom wall of the receiving groove 120, and the swash plate 310 and the second bearing 320 are installed in the receiving groove 120. A limiting groove 121 is arranged on the bottom wall of the accommodating groove 120, and one end of the second bearing 320 is connected in the limiting groove 121.

In some embodiments, referring to fig. 1, 2, 3, 4, and 5, the first bearing 210 is a rolling bearing, and the second bearing 320 and the third bearing 330 are thrust bearings. The thrust bearing can bear thrust load, so that the axial load of the rotating shaft 220 between the swash plate 310 and the upper cover 100 is ensured to be stable, the axial load between the swash plate 310 and the plunger rod 510 along the rotating shaft 220 is ensured to be stable, and the smooth operation of the swash plate 310 is ensured. The rolling bearing can bear radial load of the rotating shaft 220, so that stable operation is ensured when the driving assembly 400 drives the rotating shaft 220 to rotate.

In some embodiments, referring to fig. 1, 2, 3, 4, and 5, the shaft 220 is integrally formed with the swash plate 310. When the rotating shaft 220 and the swash plate 310 are integrated, the rotating shaft 220 is sleeved with the second bearing 320, the rotating shaft 220 penetrates through the rotating hole 110, the opposite ends of the second bearing 320 are respectively abutted against the swash plate 310 and the upper cover 100, the rotating shaft 220 is sleeved with the first bearing 210, the first bearing 210 is mounted in the rotating hole 110, the rotating shaft 220 is mounted with the first fixing sleeve 221, and the first fixing sleeve 221 limits the first bearing 210 on the rotating shaft 220.

The limit protrusion 111 may limit the first bearing 210 to move toward the swash plate 310, and the first fixing sleeve 221 limits the first bearing 210 to the rotation shaft 220, so that the limit protrusion 111 may limit the rotation shaft 220 to move toward the swash plate 310. A second bearing 320 is coupled between the swash plate 310 and the upper cover 100 such that the upper cover 100 can restrict the swash plate 310 from moving in a direction approaching the first bearing 210. The swash plate 310 and the rotating shaft 220 are integrally formed, so that the upper cover 100, the rotating shaft assembly 200 and the swash plate assembly 300 form a whole, the upper cover 100 can axially limit the swash plate 310 in a bidirectional manner, in the operation process of the plunger pump, the axial clearance between the swash plate 310 and the upper cover 100 is not easy to change, the operation reliability of the plunger pump is good, and the service life of the plunger pump is prolonged.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A plunger pump, comprising:

the upper cover is provided with a rotating hole, and the inner wall of the rotating hole is convexly provided with a limiting protrusion;

The rotating shaft assembly comprises a first bearing and a rotating shaft, the first bearing is arranged in the rotating hole, the rotating shaft penetrates through the inner ring of the first bearing, the limiting protrusion is abutted against one end of the first bearing, and the other end of the first bearing is limited on the rotating shaft;

The swash plate assembly comprises a swash plate and a second bearing, the swash plate is connected to one end of the rotating shaft, the limiting protrusion is located between the swash plate and the first bearing, one end of the swash plate, which is far away from the rotating shaft, is provided with an inclined plane inclined to the axial direction of the rotating shaft, and the opposite ends of the second bearing are respectively abutted against the swash plate and the upper cover;

The driving assembly is arranged on the upper cover, is connected to one end, far away from the sloping cam plate, of the rotating shaft and is used for driving the rotating shaft to rotate;

The plunger pump material assembly is connected with the upper cover and comprises a plunger rod, the plunger rod is abutted to the inclined plane, and the inclined plane is used for driving the plunger rod to move back and forth along the axial direction of the plunger rod to realize pumping when rotating.

2. The plunger pump of claim 1, wherein the plunger pump material assembly comprises a base, the base is connected the upper cover, a plunger cavity is arranged in the base, the plunger cavity is arranged in an open way near one end of the upper cover, a feeding channel and a discharging channel are further arranged on the base, the feeding channel and the discharging channel are both communicated to one end of the plunger cavity far away from the upper cover, the feeding channel is connected with a first one-way valve assembly, the discharging channel is connected with a second one-way valve assembly, one end of the plunger rod is slidably connected in the plunger cavity, and the other end of the plunger rod is exposed out of the plunger cavity and is abutted against the inclined surface.

3. The plunger pump of claim 2, wherein the plunger pump assembly further comprises an elastic member having one end mounted on the base, the other end of the elastic member abutting the plunger rod, the elastic member being configured to urge the plunger rod against the ramp.

4. The plunger pump of claim 2, wherein the plunger cavity, the feed channel, the discharge channel, and the plunger rod are provided in plurality, and a plurality of the plunger cavities are disposed at intervals along the circumference of the rotary shaft.

5. The plunger pump of claim 2, wherein an annular groove is provided in the plunger cavity, a seal is provided in the annular groove, and the seal is sleeved on the plunger rod.

6. The plunger pump of claim 2, wherein a communication cavity is arranged in the base, one end of the communication cavity, which is close to the upper cover, is provided with an opening, an opening end cover of the communication cavity is provided with a sealing block, a discharge port which is communicated with the communication cavity is arranged on the base, the discharge channel is communicated to the communication cavity, and the second one-way valve assembly is arranged in the communication cavity.

7. The plunger pump of claim 2, further comprising a pressure plate, wherein the pressure plate is connected to one end of the base away from the upper cover, a feed hole is formed in the pressure plate and is communicated with the feed channel, and one end of the feed hole away from the base is in a chamfer arrangement.

8. The plunger pump of claim 1, wherein a third bearing is provided on the inclined surface, and the plunger rod abuts against a side of the third bearing away from the inclined surface.

9. The plunger pump of claim 8, wherein the first bearing is a rolling bearing and the second bearing and the third bearing are both thrust bearings.

10. The plunger pump of claim 1, wherein the shaft is integrally formed with the swash plate.