CN111156143A - Multi-shaft plunger pump - Google Patents

Abstract

The invention discloses a multi-shaft plunger pump, wherein an upper cover is buckled and connected with a lower cover; two ends of the pump shaft are respectively and rotatably connected with the lower cover and the upper cover; a lower bearing ring of the thrust bearing is obliquely fixed in the lower cover, the rotating disc is fixed on the pump shaft and is provided with a plurality of plunger holes, a ball plunger is connected in each plunger hole in a sliding manner, a plurality of column shoes are fixed on an upper bearing ring of the thrust bearing, and the column shoes are correspondingly hinged with the ball end of the ball plunger; a plurality of first magnets are fixed at the bottom of the upper cover; a plurality of second magnets with opposite magnetic poles are fixed on the valve plate; the lower end surface of the valve plate is abutted against the rotating disc; the upper cover is provided with a water inlet and a water outlet, the valve plate is provided with a water inlet annular hole and a water outlet annular hole, the water inlet annular hole is arranged corresponding to the water inlet, and the water outlet annular hole is arranged corresponding to the water outlet. Aim at solves the problem that plunger pump structure is complicated and the noise is big among the prior art. The effect is as follows: the plunger pump cancels all springs, avoids the possibility of spring failure, and has simple and stable structure and low noise.

Description

Multi-shaft plunger pump

Technical Field

The embodiment of the invention relates to the technical field of plunger pumps, in particular to a multi-shaft plunger pump.

Background

The high-pressure cleaning machine is a machine which enables a high-pressure plunger pump to generate high-pressure water to wash the surface of an object through a power device, and can peel off and wash away dirt to achieve the purpose of cleaning the surface of the object; because the dirt is cleaned by using a high-pressure water column, the plunger pump of the existing handheld high-pressure cleaning machine adopts a structure that a motor drives a reduction gearbox and then drives a plunger of the pump to do left-right reciprocating motion.

The plunger pump is used as an important supercharging device, the plunger pump does reciprocating motion in the cylinder body, the volume of the sealed working cavity is changed to realize water absorption and drainage, the plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenience in flow regulation and the like, the plunger of the existing plunger pump is usually reset by a spring and other structures, the internal structure of the plunger pump is complex, the noise is high in the working process, and the service life is short.

Disclosure of Invention

Therefore, the embodiment of the invention provides a multi-shaft plunger pump to solve the problems of complex internal structure and high noise of the plunger pump in the prior art.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to a first aspect of embodiments of the present invention, a multi-axis plunger pump includes an upper cover, a lower cover, a pump shaft, a thrust bearing, a rotating disk, a port plate, a first magnet, a second magnet, a ball plunger, and a column shoe; the upper cover is provided with a cylindrical accommodating cavity with one open end, and the open end of the upper cover is buckled and connected with the lower cover; one end of the pump shaft penetrates through the lower cover and is in rotary connection with the lower cover, and the other end of the pump shaft extends into the bottom of the cylindrical containing cavity and is in rotary connection with the upper cover; the thrust bearing is sleeved on the outer peripheral side of the pump shaft, a lower bearing ring of the thrust bearing is obliquely fixed on one side, close to the upper cover, of the lower cover, the rotating disc is fixed on the pump shaft, a plurality of plunger holes are formed in the rotating disc, a ball plunger is connected in each plunger hole in a sliding mode, a plurality of column shoes are fixed on an upper bearing ring of the thrust bearing, and each column shoe is correspondingly hinged to a ball end of the ball plunger; a plurality of first magnets are fixed at the bottom of the cylindrical accommodating cavity in the upper cover; the valve plate is connected with the upper cover in a sliding way, a plurality of second magnets corresponding to the first magnets are fixed on the upper end surface of the valve plate, and the magnetic poles of the first magnets are opposite to those of the second magnets; the lower end face of the valve plate abuts against one side, close to the bottom of the cylindrical accommodating cavity, of the rotating disc; the closed end of the cylindrical accommodating cavity of the upper cover is provided with a water inlet and a water outlet, the valve plate is provided with a water inlet annular hole and a water outlet annular hole, the water inlet annular hole is arranged corresponding to the water inlet, and the water outlet annular hole is arranged corresponding to the water outlet.

Further, still include the wear-resisting dish, the rotary disk butt valve plate be fixed with the wear-resisting dish on the surface, seted up a plurality of limbers on the wear-resisting dish, seted up the open heavy slotted hole in one end in the cylinder section of bulb plunger, a plurality of limbers set up with the heavy slotted hole one-to-one in a plurality of bulb plungers, the hardness of wear-resisting dish is greater than the hardness of valve plate.

Furthermore, the bottom of the cylindrical accommodating cavity of the upper cover is provided with a water inlet guide groove and a water outlet guide groove; the water inlet ring hole of the valve plate is embedded in the water inlet guide groove, and the water outlet ring hole of the valve plate is embedded in the water outlet guide groove.

Further, still include annular seal, be provided with annular seal between water inlet ring hole and the guide way that intakes, be provided with annular seal between water outlet ring hole and the guide way that goes out.

Furthermore, the water inlet annular hole and the water outlet annular hole are both arc-shaped holes, a plurality of sharp-angle grooves are formed in the surface of the valve plate, which is in contact with the wear-resistant plate, the two arc-shaped ends of the water inlet annular hole are respectively provided with a sharp-angle groove, and the two arc-shaped ends of the water outlet annular hole are respectively provided with a sharp-angle groove.

Furthermore, the pump also comprises a first bearing and a second bearing, wherein one end of the pump shaft, which extends into the cylindrical accommodating cavity, is rotatably connected with the upper cover through the first bearing; one end of the pump shaft penetrating through the lower cover is rotationally connected with the lower cover through a second bearing; the second bearing is located on the underside of the lower race of the thrust bearing.

Further, still include first sealing washer, the junction of upper cover and lower cover is provided with first sealing washer.

Further, the pump further comprises a second sealing ring and a shaft transparent cover, the shaft transparent cover is arranged at the contact position of the second bearing and the lower cover, the shaft transparent cover is sleeved on the pump shaft, the second sealing ring is arranged between the outer peripheral side of the shaft transparent cover and the lower cover, and the inner side wall of the shaft transparent cover is connected with the pump shaft in a rotating and sealing mode.

Furthermore, still include wear-resisting copper sheathing, the lateral wall of wear-resisting copper sheathing inlays to be established in the plunger hole, and the cylinder section of bulb plunger and the inside wall sliding connection of wear-resisting copper sheathing.

Further, the upper cover is located the cylindricality and holds the chamber bottom and seted up a plurality of magnet mounting grooves on the surface, and a plurality of magnet mounting grooves are equidistant annular array setting, and the equal butt of a plurality of magnet mounting grooves is on the lateral wall that the chamber was held to the cylindricality, and the magnet mounting groove is fan-shaped, and every magnet mounting groove all inlays and is equipped with the second magnet.

The invention has the following advantages: the first magnet and the second magnet in the multi-shaft plunger pump reduce the use of springs, simplify the structure of the plunger pump, have low processing difficulty of the plunger pump, improve the working stability of the plunger pump by hinging the spherical end of the ball plunger and the column shoe, have simple structure, small friction resistance in the working process, high conversion efficiency and low running noise, eliminate all springs, including the front support spring and the plunger reciprocating spring of the injection molding pump, avoid the possibility of spring failure, have simple and stable structure and low noise.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is an exploded view of a multi-axis plunger pump according to some embodiments of the present invention.

Fig. 2 is a view of a multi-axis plunger pump according to some embodiments of the present invention with the upper cover removed.

Fig. 3 is a front view of a multi-axis plunger pump according to some embodiments of the invention.

Fig. 4 is a top view of a multi-axis plunger pump as provided in fig. 3.

Fig. 5 is a left side view of a multi-axis plunger pump as provided in fig. 3.

Fig. 6 is a cross-sectional view a-a of the multi-axis plunger pump provided in fig. 5.

Fig. 7 is a B-B sectional view of a multi-axis plunger pump provided in fig. 5.

Fig. 8 is a structural view of an upper cover of a multi-shaft plunger pump according to some embodiments of the present invention.

Fig. 9 is a cross-sectional view of a multi-axis plunger pump according to some embodiments of the invention.

Fig. 10 is a perspective view of a multi-axis plunger pump according to some embodiments of the invention.

In the figure: 1. the bearing comprises an upper cover, 2, a lower cover, 3, a pump shaft, 4, a water inlet, 5, a water outlet, 6, a rotating disc, 7, a valve plate, 8, a thrust bearing, 9, a first magnet, 10, a second magnet, 11, a water inlet annular hole, 12, a water outlet annular hole, 13, a wear-resistant disc, 14, a water through hole, 15, a plunger hole, 16, a wear-resistant copper sleeve, 17, a ball plunger, 18, a column shoe, 19, a first sealing ring, 20, an annular sealing ring, 21, a first bearing, 22, a second bearing, 23, a shaft transparent cover, 24, a second sealing ring, 25, a sink groove hole, 26, a water inlet guide groove, 27, a water outlet guide groove, 28, a magnet mounting groove, 29 and a sharp-angle groove.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 10, the multi-shaft plunger pump of the present embodiment includes an upper cover 1, a lower cover 2, a pump shaft 3, a thrust bearing 8, a rotary disk 6, a port plate 7, a first magnet 9, a second magnet 10, a ball plunger 17, and a column shoe 18; the upper cover 1 is provided with a cylindrical accommodating cavity with one open end, and the open end of the upper cover 1 is buckled and connected with the lower cover 2; one end of the pump shaft 3 penetrates through the lower cover 2 and is in rotary connection with the lower cover, and the other end of the pump shaft 3 extends into the bottom of the cylindrical accommodating cavity and is in rotary connection with the upper cover 1; the thrust bearing 8 is sleeved on the outer peripheral side of the pump shaft 3, a lower bearing ring of the thrust bearing is obliquely fixed on one side, close to the upper cover 1, of the lower cover 2, the rotating disc 6 is fixed on the pump shaft 3, a plurality of plunger holes 15 are formed in the rotating disc 6, a ball plunger 17 is connected in each plunger hole 15 in a sliding mode, a plurality of column shoes 18 are fixed on an upper bearing ring of the thrust bearing 8, and each column shoe 18 is correspondingly hinged to a ball end of the ball plunger 17; a plurality of first magnets 9 are fixed at the bottom of the cylindrical containing cavity in the upper cover 1; the port plate 7 is connected with the upper cover 1 in a sliding way, a plurality of second magnets 10 corresponding to the first magnets 9 are fixed on the upper end surface of the port plate 7, and the magnetic poles of the first magnets 9 are opposite to those of the second magnets 10; the lower end surface of the valve plate 7 abuts against one side of the rotating disc 6 close to the bottom of the cylindrical accommodating cavity; the closed end of the cylindrical accommodating cavity of the upper cover 1 is provided with a water inlet 4 and a water outlet 5, the valve plate 7 is provided with a water inlet annular hole 11 and a water outlet annular hole 12, the water inlet annular hole 11 is arranged corresponding to the water inlet 4, and the water outlet annular hole 12 is arranged corresponding to the water outlet 5.

In this embodiment, the water inlet 4 and the water outlet 5 are symmetrically arranged about the pump shaft 3, the water inlet 4 is communicated with the plurality of sunken slotted holes 25 of the plurality of ball plungers 17 through the water inlet annular hole 11, the water outlet 5 is communicated with the plurality of sunken slotted holes 25 of the plurality of ball plungers 17 through the water outlet annular hole 12, the thrust bearing 8 comprises an upper bearing ring, a lower bearing ring and a plurality of balls arranged between the upper bearing ring and the lower bearing ring, the upper bearing ring rotates relative to the lower bearing ring, preferably, the upper bearing ring is integrally formed with the plurality of column shoes 18, the ball ends of the ball plungers 17 can rotate relative to the upper ends of the column shoes 18, the plurality of column shoes 18 are arranged at equal intervals on the upper bearing ring of the thrust bearing 8, an inclined annular groove is formed in the lower cover 2, a lower bearing ring of the thrust bearing 8 is embedded in the annular groove, and an inclined angle is formed between the bottom surface of the annular groove and the vertical surface of the axis of the lower cover 2.

In one particular embodiment, for example, 7 ball plungers 17 are provided, although other numbers of ball plungers 17 are possible.

In the using process, the rotating disc 6 is driven by the pump shaft 3 to rotate, at the moment, the ball plunger 17 reciprocates in the plunger hole 15 in the rotating disc 6 under the limiting effect of the upper bearing ring of the thrust bearing 8, when the ball plunger 17 moves from the upper end to the lower end of the inclined plane of the thrust bearing 8, water is sucked from the water inlet 4, when the ball plunger 17 moves from the lower end to the upper end of the inclined plane of the thrust bearing 8, water is discharged from the water outlet hole, and low-pressure water sucked by the water suction hole is converted into high-pressure water by the ball plunger 17 and then is discharged from the water outlet hole.

The technical effect that this embodiment reaches does: first magnet 9 and second magnet 10 in the multiaxis plunger pump that sets up through this embodiment, realized the tight butt of valve plate 7 on rotary disk 6 through the magnetic repulsion of the two, the use of spring has been reduced, the structure of plunger pump has been simplified, the plunger pump processing degree of difficulty is low, through the articulated between spherical end and the column shoe 18 of bulb plunger 17, the stability of plunger pump work has been improved, this plunger pump simple structure, frictional resistance is little in the course of the work, the conversion is efficient and the noise of operation is little, this multiaxis plunger pump has cancelled all springs, including preceding supporting spring and the reciprocal spring of plunger of the pump of moulding plastics, the possibility of spring inefficacy has been avoided, simple structure is stable and the noise is little.

Example 2

As shown in fig. 1 to 10, the multi-shaft plunger pump in the present embodiment includes all the technical features of embodiment 1, and in addition, includes a wear-resistant disc 13, the wear-resistant disc 13 is fixed on the surface of the rotating disc 6 abutting against the port plate 7, the wear-resistant disc 13 is provided with a plurality of water through holes 14, a cylindrical section of the ball plunger 17 is provided with a sunk slot hole 25 with one open end, the plurality of water through holes 14 are arranged in one-to-one correspondence with the sunk slot holes 25 in the plurality of ball plungers 17, and the hardness of the wear-resistant disc 13 is greater than that of the port plate 7; the bottom of the cylindrical accommodating cavity of the upper cover 1 is provided with a water inlet guide groove 26 and a water outlet guide groove 27; the water inlet ring hole 11 of the valve plate 7 is embedded in the water inlet guide groove 26, and the water outlet ring hole 12 of the valve plate 7 is embedded in the water outlet guide groove 27.

In this embodiment, for example, the surface hardness of the wear-resistant disc 13 is 800HV or more, the surface hardness of the port plate 7 is 200HV, in some specific embodiments, the material of the wear-resistant disc 13 is 38CrMoAl alloy steel, the wear-resistant disc has wear-resistant characteristics, and can be manufactured by processes such as stamping, turning, grinding, carbonitriding surface treatment, and the like, and the port plate 7 is a copper alloy material having a hardness lower than that of the wear-resistant disc 13.

In this embodiment, the water passage hole 14 is a curved strip, the area of the water passage hole 14 is smaller than the cross-sectional area of the counter sink hole 25 in the ball plunger 17, and as the port plate 7 wears, under the action of the magnetic repulsion force of the first magnet 9 and the second magnet 10, the water inlet ring hole 11 slightly moves along the axial direction of the pump shaft 3 under the guiding action of the water inlet guide groove 26 and the limiting action of the water outlet ring hole 12 under the limiting action of the water outlet guide groove 27, and preferably, the port plate 7 is made of wear-resistant copper.

The beneficial effects in this embodiment are: through setting up wear-resisting dish 13, reduced the wearing and tearing that the rotary disk 6 rotation in-process produced, improved the life of multiaxis plunger pump, through setting up into water guide way 26 and play water guide way 27, avoided the rotation of valve plate 7 in the use, played better guide effect to valve plate 7.

Example 3

As shown in fig. 1 to 10, the multi-axis plunger pump of the present embodiment includes all the technical features of embodiment 2, and in addition, further includes an annular sealing ring 20, the annular sealing ring 20 is disposed between the water inlet ring hole 11 and the water inlet guide groove 26, and the annular sealing ring 20 is disposed between the water outlet ring hole 12 and the water outlet guide groove 27; the water inlet annular hole 11 and the water outlet annular hole 12 are both arc-shaped holes, a plurality of sharp-angle grooves 29 are formed in the surface of the valve plate 7, which is in contact with the wear-resistant plate 13, the sharp-angle grooves 29 are respectively formed in the two arc-shaped ends of the water inlet annular hole 11, and the sharp-angle grooves 29 are respectively formed in the two arc-shaped ends of the water outlet annular hole 12.

In the present embodiment, the outer edge of the annular sealing ring 20 is disposed around the inlet guide groove 26 or the outlet guide groove 27.

The beneficial effects in this embodiment are: through setting up ring type seal 20, improved the sealing performance between valve plate 7 and upper cover 1, through setting up sharp corner groove 29, played the effect that reduces the noise in the use.

Example 4

As shown in fig. 1 to 10, the multi-shaft plunger pump of the present embodiment includes all the technical features of embodiment 3, and in addition, includes a first bearing 21 and a second bearing 22, and one end of the pump shaft 3 extending into the cylindrical accommodating cavity is rotatably connected to the upper cover 1 through the first bearing 21; one end of the pump shaft 3 penetrating through the lower cover 2 is rotatably connected with the lower cover 2 through a second bearing 22; the second bearing 22 is located on the lower side of the lower race of the thrust bearing 8; the sealing device also comprises a first sealing ring 19, and the first sealing ring 19 is arranged at the joint of the upper cover 1 and the lower cover 2; the pump is characterized by further comprising a second sealing ring 24 and a shaft transparent cover 23, wherein the shaft transparent cover 23 is arranged at the contact position of the second bearing 22 and the lower cover 2, the shaft transparent cover 23 is sleeved on the pump shaft 3, the second sealing ring 24 is arranged between the outer peripheral side of the shaft transparent cover 23 and the lower cover 2, the inner side wall of the shaft transparent cover 23 is connected with the pump shaft 3 in a rotating and sealing mode, and two sets of shafts are used for realizing rotating and sealing through Glae rings.

In the present embodiment, the first seal ring 19 and the second seal ring 24 are both O-ring seals, and the first bearing 21 and the second bearing 22 are both rolling bearings such as angular contact bearings or deep groove ball bearings.

The beneficial effects in this embodiment are: the first bearing 21 and the second bearing 22 are arranged, so that the fluency of the rotation process of the pump shaft 3 is improved; through setting up first sealing washer 19, improved the sealing performance between upper cover 1 and the lower cover 2, through setting up second sealing washer 24, realized the leakproofness of pump shaft 3 rotation in-process.

Example 5

As shown in fig. 1 to 10, the multi-shaft plunger pump in the present embodiment includes all the technical features of embodiment 4, and in addition, includes a wear-resistant copper sleeve 16, an outer side wall of the wear-resistant copper sleeve 16 is embedded in the plunger hole 15, and a cylindrical section of the ball plunger 17 is slidably connected with an inner side wall of the wear-resistant copper sleeve 16; the upper cover 1 is located the cylindricality and holds the chamber bottom and seted up a plurality of magnet mounting grooves 28 on the surface, and a plurality of magnet mounting grooves 28 equidistant annular array sets up, and a plurality of magnet mounting grooves 28 all butt hold the lateral wall in chamber at the cylindricality on, and magnet mounting groove 28 is fan-shaped, and every magnet mounting groove 28 all inlays and is equipped with second magnet 10.

For example, the wear-resistant copper sleeve 16 is made of ZCuZn25Al6Fe3Mn3 copper alloy, and is made by rolling a copper plate to be coated with a wear-resistant material.

In the present embodiment, the first magnet 9 and the second magnet 10 are each a sector structure.

The beneficial effects in this embodiment are: the abrasion between the wear-resistant copper sleeve 16 and the ball plunger 17 is avoided by arranging the wear-resistant copper sleeve 16; by arranging the first magnet 9 and the second magnet 10 in a fan shape, the uniformity of the magnetic field is improved, and a uniform and stable magnetic repulsive force is generated between the port plate 7 and the upper cover 1.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Claims (10)

1. A multi-shaft plunger pump is characterized by comprising an upper cover (1), a lower cover (2), a pump shaft (3), a thrust bearing (8), a rotating disc (6), a port plate (7), a first magnet (9), a second magnet (10), a ball plunger (17) and a column shoe (18); the upper cover (1) is provided with a cylindrical accommodating cavity with one open end, and the open end of the upper cover (1) is buckled and connected with the lower cover (2); one end of the pump shaft (3) penetrates through the lower cover (2) and is in rotary connection with the lower cover, and the other end of the pump shaft (3) extends into the bottom of the cylindrical containing cavity and is in rotary connection with the upper cover (1); the thrust bearing (8) is sleeved on the outer peripheral side of the pump shaft (3), a lower bearing ring of the thrust bearing is obliquely fixed on one side, close to the upper cover (1), of the lower cover (2), the rotating disc (6) is fixed on the pump shaft (3), a plurality of plunger holes (15) are formed in the rotating disc (6), the ball plunger (17) is connected in each plunger hole (15) in a sliding mode, a plurality of column shoes (18) are fixed on an upper bearing ring of the thrust bearing (8), and each column shoe (18) is correspondingly hinged to a ball head end of the ball plunger (17); a plurality of first magnets (9) are fixed at the bottom of the cylindrical containing cavity in the upper cover (1); the valve plate (7) is connected with the upper cover (1) in a sliding way, a plurality of second magnets (10) corresponding to the first magnets (9) are fixed on the upper end surface of the valve plate (7), and the magnetic poles of the first magnets (9) and the second magnets (10) are opposite; the lower end face of the valve plate (7) abuts against one side, close to the bottom of the cylindrical containing cavity, of the rotating disc (6); the water distributor is characterized in that a water inlet (4) and a water outlet (5) are formed in the closed end of the cylindrical containing cavity of the upper cover (1), a water inlet annular hole (11) and a water outlet annular hole (12) are formed in the valve plate (7), the water inlet annular hole (11) corresponds to the water inlet (4), and the water outlet annular hole (12) corresponds to the water outlet (5).

2. The multi-shaft plunger pump according to claim 1, further comprising a wear-resistant disc (13), wherein the wear-resistant disc (13) is fixed on the surface of the rotating disc (6) abutting against the port plate (7), the wear-resistant disc (13) is provided with a plurality of water through holes (14), a slotted hole (25) with one open end is formed in the cylindrical section of the ball plunger (17), the plurality of water through holes (14) and the slotted holes (25) in the ball plunger (17) are arranged in a one-to-one correspondence manner, and the hardness of the wear-resistant disc (13) is greater than that of the port plate (7).

3. Multiaxial plunger pump according to claim 1 where the bottom of the cylindrical housing chamber of the upper cover (1) is provided with a water inlet guide (26) and a water outlet guide (27); the water inlet annular hole (11) of the valve plate (7) is embedded in the water inlet guide groove (26), and the water outlet annular hole (12) of the valve plate (7) is embedded in the water outlet guide groove (27).

4. Multiaxis plunger pump as claimed in claim 3, characterized in that it further comprises an annular sealing ring (20), the annular sealing ring (20) being arranged between the water inlet ring hole (11) and the water inlet guide groove (26), the annular sealing ring (20) being arranged between the water outlet ring hole (12) and the water outlet guide groove (27).

5. The multi-shaft plunger pump as claimed in claim 2, characterized in that the water inlet ring hole (11) and the water outlet ring hole (12) are both arc-shaped holes, a plurality of sharp-angled grooves (29) are formed on the surface of the valve plate (7) contacting the wear-resistant plate (13), the sharp-angled grooves (29) are respectively formed at two arc-shaped ends of the water inlet ring hole (11), and the sharp-angled grooves (29) are respectively formed at two arc-shaped ends of the water outlet ring hole (12).

6. Multiaxial plunger pump according to claim 1 further including a first bearing (21) and a second bearing (22), the end of the pump shaft (3) extending into the cylindrical receiving cavity being rotationally connected to the upper cover (1) by the first bearing (21); one end of the pump shaft (3) penetrating through the lower cover (2) is rotatably connected with the lower cover (2) through the second bearing (22); the second bearing (22) is located on the underside of the lower race of the thrust bearing (8).

7. Multiaxis plunger pump as claimed in claim 6, characterized in that it further comprises a first sealing ring (19), the first sealing ring (19) being provided at the connection of the upper cover (1) and the lower cover (2).

8. The multi-shaft plunger pump according to claim 7, further comprising a second seal ring (24) and a shaft transparent cover (23), wherein the shaft transparent cover (23) is arranged at the contact position of the second bearing (22) and the lower cover (2), the shaft transparent cover (23) is sleeved on the pump shaft (3), the second seal ring (24) is arranged between the outer peripheral side of the shaft transparent cover (23) and the lower cover (2), and the inner side wall of the shaft transparent cover (23) is connected with the pump shaft (3) in a rotating and sealing manner.

9. Multiaxial plunger pump according to claim 1 further including a wear-resistant copper sleeve (16), the outer side wall of the wear-resistant copper sleeve (16) is embedded in the plunger hole (15), and the cylindrical section of the ball plunger (17) is slidably connected with the inner side wall of the wear-resistant copper sleeve (16).

10. Multiaxis plunger pump as claimed in claim 1, characterized in that the upper cover (1) has a plurality of magnet mounting slots (28) cut into its surface at the bottom of the cylindrical housing cavity, the plurality of magnet mounting slots (28) are arranged in an equally spaced annular array, the plurality of magnet mounting slots (28) are all abutted against the side wall of the cylindrical housing cavity, the magnet mounting slots (28) are fan-shaped, and each magnet mounting slot (28) is embedded with the second magnet (10).

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