CN217270760U

CN217270760U - Radial plunger pump

Info

Publication number: CN217270760U
Application number: CN202121391169.6U
Authority: CN
Inventors: 任磊石
Original assignee: Wuxi Shengrui Machinery Electronic Co ltd
Current assignee: Wuxi Shengrui Machinery Electronic Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-08-23
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses a radial plunger pump, include: the pump comprises a pump body, a rear cover, a rotating shaft and a plunger mechanism, wherein the rear cover is buckled at one end of the pump body, the rotating shaft is rotatably connected with the pump body, and the plunger mechanism is arranged in an area jointly limited by the pump body and the rear cover; plunger mechanism includes valve piece, the check valve that produces oil, plunger bushing, oil feed check valve and plunger, has seted up oil outlet and inlet port on the valve piece, produces oil check valve and oil outlet intercommunication, plunger bushing and inlet port intercommunication, and the plunger inlays to be established inside the plunger bushing, is fixed with the eccentric block in the pivot, plunger one end and eccentric block butt. When the plunger and the parts in sliding fit with the plunger are processed, the plunger and the plunger sleeve only need to be processed independently, and the whole valve block does not need to be processed; when the plunger piston and the plunger piston sleeve are damaged, the valve body can be repeatedly utilized only by replacing the plunger piston and the plunger piston sleeve; be provided with a plurality of oil feed check valves on the valve body, this setting can improve the oil absorption efficiency of this plunger pump.

Description

Radial plunger pump

Technical Field

The utility model relates to a plunger pump field, more specifically say so and relate to a radial plunger pump.

Background

The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like. Plunger pumps are widely used in applications where high pressure, high flow and flow needs to be regulated, such as hydraulic machines, engineering machinery and ships. And the radial plunger pump is a plunger pump in which the reciprocating direction of a piston or plunger is perpendicular to a driving shaft.

The existing radial plunger pump on the market generally has a valve block which is directly provided with an opening and is embedded with a plunger in a sliding manner, the valve block is provided with an oil inlet and an oil outlet, when the valve block is machined, a tool clamp matched with the valve block must be used in the machining process due to the irregular shape of the valve block, and when the matching surface of the valve block and the plunger is damaged, the whole valve block needs to be replaced. In addition, one of the methods of increasing the oil output of radial piston pumps is to increase the number of pistons. And if increase the plunger on same working face can cause pump body volume grow, its processing degree of difficulty can further be increased in above-mentioned design, the same motion state must be done to the plunger of same row in the current structure, either all be the state of drawing oil or all be the oil absorption state promptly, the eccentric block that corresponds can comparatively concentrate arrange in pivot one side, and along with the increase of plunger mechanism, the weight of eccentric block is big more, its dynamic balance of pivot when high-speed rotation is worse, the vibrations of whole plunger pump are big, the stability variation.

Therefore, how to provide a radial plunger pump that can overcome the above problems is a problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a radial type plunger pump.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a radial piston pump comprising: the pump comprises a pump body, a rear cover, a rotating shaft and a plunger mechanism, wherein the pump body is integrally cylindrical, an oil outlet channel is arranged in the pump body, the oil outlet channel is provided with an inlet and an outlet, the inlet penetrates through one end wall of the pump body, the outlet penetrates through the outer side wall of the pump body, the rear cover is in sealing buckling connection with one end face of the pump body and defines a sealing cavity with the end face, and the rotating shaft coaxially penetrates through two end faces of the pump body and is in rotating connection with the two end faces;

the plunger mechanism is arranged in the sealing cavity and comprises a valve block, an oil outlet one-way valve, a plunger sleeve, an oil inlet one-way valve and a plunger, wherein the valve block is provided with a through hole penetrating through two end surfaces of the valve block, the oil outlet one-way valve is tightly embedded in the through hole, the part of the plunger sleeve is tightly embedded in the through hole, one end of the plunger sleeve, which is positioned in the through hole, is communicated with the oil inlet end of the oil outlet one-way valve, the side wall of the valve block is provided with an oil outlet hole and a plurality of oil inlet holes, the oil outlet end of the oil outlet one-way valve is communicated with one end of the oil outlet hole, the inside of each oil inlet hole is tightly embedded with one oil inlet one-way valve, the side wall of the plunger sleeve is provided with a plurality of oil holes, one end of each oil inlet hole is communicated with the sealing cavity, the other end of each oil hole corresponds to and is communicated with the position of each oil hole, one end of the plunger is slidably embedded in the plunger sleeve, and the axial lead of the plunger is vertical to and coplanar with the axial lead of the rotating shaft; an eccentric block is fixed on the outer side wall of the rotating shaft, the eccentric block is arranged in the sealing cavity, and one end, far away from the plunger sleeve, of the plunger can be abutted against the eccentric block; an oil way inlet is formed in the rear cover and communicated with the sealing cavity, and an inlet of the oil outlet channel is communicated with one end, far away from the oil outlet check valve, of the oil outlet hole.

According to the technical scheme, compared with the prior art, the utility model discloses a radial plunger pump, the utility model discloses a through setting up the plunger bushing, the plunger bushing is inlayed in the through-hole, and the plunger is inlayed in the plunger bushing in a sliding way, and this setting makes only need to handle plunger and plunger bushing alone when processing the plunger and the spare part that matches with it in a sliding way, does not need to process the whole valve block; the plunger sleeve has a simple structure, is convenient for further processing the valve body in the later period, and is beneficial to improving the processing precision of products; the abrasion of the plunger pump is mainly concentrated on the plunger and the plunger sleeve, when the plunger and the plunger sleeve are damaged, only the plunger and the plunger sleeve need to be replaced, the valve body can be repeatedly utilized, and the production and maintenance cost of the plunger pump is further reduced by the arrangement; be provided with a plurality of oil feed check valves on the valve body, this setting can further improve the oil absorption efficiency of this plunger pump.

Preferably, the plunger mechanism is provided with a plurality of plunger mechanisms, the oil outlet channel is provided with a plurality of inlets and an outlet, one valve block in the plurality of valve blocks is provided with an oil outlet, the other valve blocks are provided with two oppositely-arranged oil outlets, the plurality of valve blocks are sequentially arranged along the length direction of the pump body, the valve block with one oil outlet is arranged far away from the pump body, the two oil outlets on the two adjacent valve blocks correspond to and are communicated with each other, and the inlet of the oil outlet channel corresponds to and is communicated with the oil outlet on the valve block closest to the pump body; a plurality of eccentric blocks are uniformly fixed on the outer side wall of the rotating shaft along the length direction of the rotating shaft, a geometric center connecting line of two adjacent eccentric blocks and the shaft axis of the rotating shaft have a cross point, the two eccentric blocks are centrosymmetric about the cross point, and one ends of a plurality of plungers respectively far away from a plurality of plunger sleeves can be respectively abutted against the eccentric blocks. Because each plunger mechanism is independently provided with an oil outlet one-way valve, the arrangement can ensure that a plurality of plunger mechanisms can be sequentially superposed in a sealed area defined by the pump body and the rear cover along the length direction of the pump body, oil outlet holes on the plurality of plunger mechanisms are sequentially connected in series and are finally communicated with an oil outlet channel, the arrangement does not need to be provided with the one-way valve for preventing oil from flowing backwards, the arrangement is convenient for superposing the plunger mechanisms on one hand, and the production and processing cost of the plunger pump can be effectively reduced on the other hand; because be provided with a plurality of eccentric blocks in the pivot, and two adjacent eccentric block centrosymmetries, should set up and can guarantee that a plurality of plunger mechanisms can be reasonable arrange in the sealed region that the pump body and back lid were injectd, the pivot can guarantee that it has better dynamic balance when rotating, and then increases the life of this plunger pump.

Preferably, the through hole is a stepped hole, and the inner wall of the through hole is provided with three step surfaces which are a first step surface, a second step surface and a third step surface in sequence along the hole length direction; a fourth step surface is arranged on the outer side wall of the plunger sleeve and is abutted against the first step surface; a sealing washer is also embedded in the through hole, and one end face of the sealing washer is abutted against the second step face; the oil outlet one-way valve comprises a valve seat, a spring, a valve ball and a circular valve plate, wherein the valve seat is integrally cylindrical, one end of the valve seat is provided with a blind hole, the spring is embedded in the blind hole, one end of the spring, which is far away from the bottom of the blind hole, is fixed with the valve ball, the circular valve plate is coaxially embedded in the through hole, one end face of the circular valve plate is abutted against one end face, which is far away from the second step face, of a sealing gasket, a valve hole penetrating through two end faces of the circular valve plate is arranged on the circular valve plate in a centered mode, the diameter of the valve ball is larger than the inner diameter of the valve hole, the valve hole can be blocked by the valve ball, the outer side wall of the valve seat is provided with a fifth step face, the fifth step face is abutted against the third step face, a sealing ring is sleeved between the fifth step face and the third step face, an end face, which is far away from the sealing gasket, of the valve plate and an end face, which is close to a plunger sleeve, of the valve seat, an oil passing gap is corresponding and communicated with the oil passing gap. This setting can guarantee on the one hand that plunger bushing and oil outlet check valve homoenergetic closely cooperate with the through-hole, and on the other hand then guarantees oil outlet check valve and plunger bushing can with the reliable intercommunication of oil outlet.

Preferably, the one end that the plunger barrel was kept away from to the plunger is fixed with a columniform plunger cap, and the external diameter of plunger cap is greater than the external diameter of plunger, and the cover is equipped with a return spring on the lateral wall of plunger barrel, and the one end terminal surface butt of the check valve that produces oil is kept away from to return spring one end and valve block, and the other end is close to the one end terminal surface butt of valve block with the plunger cap. This setting can be reliable fixes return spring to, owing to be provided with return spring, when eccentric block and plunger cap break away from the butt, because return spring's pushing action, stretch out and carry out the oil absorption action in the follow plunger bushing that the plunger can be timely.

Preferably, an annular lubricating groove is coaxially formed in the outer side wall of the plunger, and lubricating grease is filled in the lubricating groove. This setting can guarantee to form reliable sliding seal between plunger and the plunger bushing.

Preferably, a mounting hole penetrating through two end faces of the pump body is formed in the middle of the pump body, a rotating sealing ring, a check ring and a plurality of bearings are sequentially embedded in the mounting hole and along the length direction of the pump body, the rotating shaft sequentially penetrates through an inner ring of the rotating sealing ring, an inner ring of the check ring and inner rings of the plurality of bearings, and the outer side wall of the rotating shaft is in interference fit with the inner rings of the bearings and is in clearance fit with the inner rings of the check rings. This setting guarantees that the pivot can be connected with the reliable rotation of the pump body to guarantee its leakproofness.

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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a front view of a radial piston pump;

FIG. 2 is a sectional view in the direction of FIG. 1A-A;

fig. 3 is a plan view of a coupling structure of a plunger mechanism and a return spring of a radial type plunger pump;

FIG. 4 is a sectional view in the direction of FIG. 3B-B;

FIG. 5 is a cross-sectional view taken in the direction of FIG. 3C-C;

FIG. 6 is a top view of a valve block of a radial piston pump;

FIG. 7 is a cross-sectional view taken in the direction of D-D of FIG. 6;

fig. 8 is a front view of a coupling structure of a plunger and a plunger cap of a radial type plunger pump;

fig. 9 is a front view of a plunger sleeve of a radial plunger pump.

In the figure:

01 is a pump body, 010 is an oil outlet channel, 011 is a mounting hole, 02 is a rear cover, 020 is an oil path inlet, 03 is a rotating shaft, 04 is a valve block, 040 is a through hole, 0400 is a first step surface, 0401 is a second step surface, 0402 is a third step surface, 041 is an oil outlet hole, 042 is an oil inlet hole, 05 is an oil outlet one-way valve, 050 is a valve seat, 0500 is a blind hole, 0501 is a fifth step surface, 051 is a spring, 052 is a valve ball, 053 is a circular valve plate, 0530 is a valve hole, 06 is a plunger sleeve, 060 is an oil hole, 061 is a fourth step surface, 07 is an oil inlet one-way valve, 08 is a plunger, 080 is a lubricating groove, 09 is an eccentric block, 10 is a sealing washer, 11 is a sealing ring, 12 is a plunger cap, 13 is a return spring, 14 is lubricating grease, 15 is a rotary sealing ring, 16 is a retainer ring, and 17 is a bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses a radial plunger pump, the utility model discloses a through setting up plunger bushing 06, plunger bushing 06 inlays the dress in through-hole 040, and the sliding fit has plunger 08 in plunger bushing 06, and this setting makes when processing plunger 08 and the spare part rather than sliding fit, only need to handle plunger 08 and plunger bushing 06 alone, does not need to process whole valve block 04; the plunger sleeve 06 is simple in structure, facilitates later-stage further processing of the valve body, and is beneficial to improving the processing precision of products; the abrasion of the plunger pump is mainly concentrated on the plunger 08 and the plunger sleeve 06, when the plunger 08 and the plunger sleeve 06 are damaged, only the plunger 08 and the plunger sleeve 06 need to be replaced, the valve body can be repeatedly utilized, and the arrangement further reduces the production and maintenance cost of the plunger pump; a plurality of oil inlet one-way valves 07 are arranged on the valve body, and the oil absorption efficiency of the plunger pump can be further improved through the arrangement; because each plunger mechanism is independently provided with one oil outlet one-way valve 05, the arrangement can ensure that a plurality of plunger mechanisms can be sequentially superposed in a sealed area limited by the pump body 01 and the rear cover 02 along the length direction of the pump body 01, oil outlet holes 041 on the plurality of plunger mechanisms are sequentially connected in series and are finally communicated with the oil outlet channel 010, the pump body 01 does not need to be provided with the one-way valve for preventing oil from flowing backwards, the arrangement is convenient for superposing the plurality of plunger mechanisms on one hand, and the production and processing cost of the plunger pump can be effectively reduced on the other hand; because be provided with a plurality of eccentric blocks 09 on pivot 03, and two adjacent eccentric blocks 09 central symmetry, this setting can guarantee that a plurality of plunger mechanisms can be reasonable arrange in the airtight region that the pump body 01 and back lid 02 are injectd, pivot 03 can guarantee that it has better dynamic balance when rotating, and then increases the life of this plunger pump.

Examples

Referring to fig. 1-9, the present invention provides a schematic overall and partial structure diagram of an embodiment of the present invention, specifically disclosing a radial plunger pump, comprising: the pump comprises a pump body 01, a rear cover 02, a rotating shaft 03 and a plunger mechanism, wherein the pump body 01 is integrally cylindrical, an oil outlet channel 010 is arranged in the pump body 01, the oil outlet channel 010 is provided with an inlet and an outlet, the inlet penetrates through one end wall of the pump body 01, the outlet penetrates through the outer side wall of the pump body 01, the rear cover 02 is in sealing buckling connection with one end face of the pump body 01 and defines a sealing cavity with the pump body, and the rotating shaft 03 coaxially penetrates through two end faces of the pump body 01 and is in rotating connection with the two end faces;

the plunger mechanism is arranged in the sealing cavity and comprises a valve block 04 and an oil outlet one-way valve 05, the plunger sleeve 06, the oil inlet one-way valve 07 and the plunger 08, the valve block 04 is provided with a through hole 040 penetrating through two end faces of the valve block, the oil outlet one-way valve 05 is tightly embedded in the through hole 040, part of the plunger sleeve 06 is tightly embedded in the through hole 040, one end of the plunger sleeve 06, which is positioned in the through hole 040, is communicated with the oil inlet end of the oil outlet one-way valve 05, the side wall of the valve block 04 is provided with an oil outlet 041 and a plurality of oil inlets 042, the oil outlet end of the oil outlet one-way valve 05 is communicated with one end of the oil outlet 041, the inside of each oil inlet 042 is tightly embedded with one oil inlet one-way valve 07, the side wall of the plunger sleeve 06 is provided with a plurality of oil holes 060, one end of each oil inlet 042 is communicated with the sealing cavity, the other end of each oil hole is communicated with the corresponding to the position of the corresponding to the corresponding oil hole 060, one end of the plunger 08 is slidably embedded in the plunger sleeve 06, and the axial line of the plunger 08 is vertical to and coplanar with the axial line of the rotating shaft 03; an eccentric block 09 is fixed on the outer side wall of the rotating shaft 03, the eccentric block 09 is arranged in the sealing cavity, and one end, far away from the plunger sleeve 06, of the plunger 08 can abut against the eccentric block 09; an oil way inlet 020 is formed in the rear cover 02, the oil way inlet 020 is communicated with the sealing cavity, and an inlet of the oil outlet channel 010 is communicated with one end, far away from the oil outlet one-way valve 05, of the oil outlet hole 041.

More specifically, the plunger mechanism is provided with a plurality of plunger mechanisms, the oil outlet channel 010 has a plurality of inlets and an outlet, one valve block 04 in the plurality of valve blocks 04 has one oil outlet 041, the rest valve blocks 04 have two oppositely arranged oil outlets 041, the plurality of valve blocks 04 are sequentially arranged along the length direction of the pump body 01, the valve block 04 with one oil outlet 041 is arranged away from the pump body 01, the two oil outlets 041 on the two adjacent valve blocks 04 correspond to and are communicated with each other in position, and the inlet of the oil outlet channel 010 corresponds to and is communicated with the oil outlet 041 on the valve block 04 closest to the pump body 01 in position; a plurality of eccentric blocks 09 are uniformly distributed and fixed on the outer side wall of the rotating shaft 03 along the length direction of the rotating shaft, a geometric center connecting line of two adjacent eccentric blocks 09 has a cross point with the shaft axis of the rotating shaft 03, the two eccentric blocks are centrosymmetric about the cross point, and one ends of the plungers 08, which are far away from the plunger sleeves 06, can be abutted against the eccentric blocks 09.

More specifically, the through hole 040 is a stepped hole, and the inner wall of the through hole 040 has three mutually parallel stepped surfaces, which are a first stepped surface 0400, a second stepped surface 0401, and a third stepped surface 0402 in this order along the hole length direction; the outer side wall of the plunger sleeve 06 is provided with a fourth step surface 061, and the fourth step surface 061 is abutted against the first step surface 0400; a sealing gasket 10 is further embedded in the through hole 040, and one end face of the sealing gasket 10 is abutted against the second step face 0401; the oil outlet one-way valve 05 comprises a valve seat 050, a spring 051, a valve ball 052 and a circular valve plate 053, the valve seat 050 is integrally cylindrical, a blind hole 0500 is formed in the middle of one end of the valve seat 050, the spring 051 is embedded in the blind hole 0500, the valve ball 052 is fixed at one end, far away from the bottom of a hole of the blind hole 0500, the circular valve plate 053 is coaxially embedded in a through hole 040, one end face of the circular valve plate 053 is abutted to one end face, far away from a second step face 0401, of a sealing washer 10, a circular valve hole 0530 penetrating through two end faces of the circular valve plate 053 is formed in the middle of the circular valve plate 053, the diameter of the valve ball 052 is larger than the inner diameter of the valve hole 0530, the valve hole 0530 can be sealed by the valve ball 052, a fifth step 0501 is arranged on the outer side wall of the valve seat 050, a sealing ring 11 is abutted to the fifth step face 0501 and a third step face 0402, a sealing ring 11 is sleeved between the end face, a gap exists between one end face, far away from the sealing washer 10 and one end face, close to the plunger sleeve 06, of the valve seat 050, the oil outlet 041 corresponds to and communicates with the oil passing gap.

Further specifically, one end of the plunger 08, which is far away from the plunger sleeve 06, is integrally formed with a cylindrical plunger cap 12, the outer diameter of the plunger cap 12 is larger than that of the plunger 08, a return spring 13 is sleeved on the outer side wall of the plunger sleeve 06, one end of the return spring 13 abuts against one end face, which is far away from the oil outlet check valve 05, of the valve block 04, and the other end of the return spring abuts against one end face, which is close to the valve block 04, of the plunger cap 12.

More specifically, an annular lubricating groove 080 is coaxially formed in the outer side wall of the plunger 08, and lubricating grease 14 is filled in the lubricating groove 080.

Further specifically, a mounting hole 011 penetrating through two end faces of the pump body 01 is formed in the middle of the pump body 01, a rotary sealing ring 15, a check ring 16 and a plurality of bearings 17 are sequentially embedded in the mounting hole 011 and along the length direction of the pump body 01, the rotating shaft 03 sequentially penetrates through an inner ring of the rotary sealing ring 15, an inner ring of the check ring 16 and inner rings of the plurality of bearings 17, and the outer side wall of the rotating shaft 03 is in interference fit with the inner rings of the bearings 17 and is in clearance fit with the inner rings of the check ring 16.

The working principle of the radial plunger pump is as follows:

when the radial plunger pump starts to work, as the return spring 13 and the eccentric block 09 are arranged, when the rotating shaft 03 rotates, the plunger 08 can do reciprocating telescopic motion in the plunger sleeve 06,

an oil absorption process: when the moving direction of the plunger 08 is close to the rotating shaft 03, the vacuum degree in the plunger sleeve 06 is increased, the pressure intensity is reduced, at the moment, the two oil inlet one-way valves 07 are opened, the valve hole 0530 is blocked by the valve ball 052 in the oil outlet one-way valve 05, and oil enters the plunger sleeve 06 along the oil inlet hole 042 and the oil inlet one-way valve 07;

an oil pumping process: when the plunger 08 moves away from the rotating shaft 03, the pressure inside the plunger sleeve 06 increases, the two oil inlet check valves 07 are closed, the valve ball 052 in the oil outlet check valve 05 moves downwards under the action of oil pressure inside the plunger sleeve 06, the valve ball 052 does not block the valve hole 0530 any more, and oil can be discharged from the oil outlet 041.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A radial piston pump, comprising: the oil pump comprises a pump body (01), a rear cover (02), a rotating shaft (03) and a plunger mechanism, wherein the pump body (01) is integrally cylindrical, an oil outlet channel (010) is arranged in the pump body (01), the oil outlet channel (010) is provided with an inlet and an outlet, the inlet penetrates through one end wall of the pump body (01), the outlet penetrates through the outer side wall of the pump body (01), the rear cover (02) is in sealing buckling connection with one end face of the pump body (01) and defines a sealing cavity with the end face, and the rotating shaft (03) coaxially penetrates through two end faces of the pump body (01) and is in rotating connection with the two end faces;

the plunger mechanism is arranged in the sealing cavity and comprises a valve block (04), an oil outlet one-way valve (05), a plunger sleeve (06), an oil inlet one-way valve (07) and a plunger (08), the valve block (04) is provided with a through hole (040) penetrating through two end faces of the valve block, the oil outlet one-way valve (05) is tightly embedded in the through hole (040), the part of the plunger sleeve (06) is tightly embedded in the through hole (040) and one end of the plunger sleeve positioned in the through hole (040) is communicated with the oil inlet end of the oil outlet one-way valve (05), the side wall of the valve block (04) is provided with an oil outlet (041) and a plurality of oil inlet holes (042), the oil outlet end of the oil outlet one-way valve (05) is communicated with one end of the oil outlet (041), the inside of each oil inlet hole (042) is tightly embedded with one oil inlet one-way valve (07), the side wall of the plunger sleeve (06) is provided with a plurality of oil holes (060), one end of the oil inlet holes (042) is communicated with the sealing cavity, the other end of the plunger piston is communicated with the oil hole (060) in a corresponding mode, one end of the plunger piston (08) is embedded in the plunger piston sleeve (06) in a sliding mode, and the axial lead of the plunger piston (08) is vertical to the axial lead of the rotating shaft (03) and is coplanar; an eccentric block (09) is fixed on the outer side wall of the rotating shaft (03), the eccentric block (09) is arranged in the sealing cavity, and one end, far away from the plunger sleeve (06), of the plunger (08) can abut against the eccentric block (09); an oil way inlet (020) is formed in the rear cover (02), the oil way inlet (020) is communicated with the sealing cavity, and an inlet of the oil outlet channel (010) is communicated with one end, far away from the oil outlet one-way valve (05), of the oil outlet hole (041).

2. The radial plunger pump of claim 1, wherein the plunger mechanism is provided with a plurality of oil outlet channels (010), the oil outlet channels (010) are provided with a plurality of inlets and an outlet, one valve block (04) in the plurality of valve blocks (04) is provided with one oil outlet hole (041), the rest of the valve blocks (04) are provided with two oppositely arranged oil outlet holes (041), the plurality of valve blocks (04) are sequentially arranged along the length direction of the pump body (01), the valve block (04) with one oil outlet hole (041) is arranged far away from the pump body (01), the two oil outlet holes (041) on the two adjacent valve blocks (04) correspond to and are communicated, and the inlet of the oil outlet channel (010) corresponds to and is communicated with the oil outlet hole (041) on the valve block (04) closest to the pump body (01); a plurality of eccentric blocks (09) are uniformly distributed and fixed on the outer side wall of the rotating shaft (03) along the length direction, a geometric center connecting line of two adjacent eccentric blocks (09) and the shaft axis of the rotating shaft (03) have a cross point, the two eccentric blocks are centrosymmetric about the cross point, and one ends of a plurality of plungers (08) far away from a plurality of plunger sleeves (06) can be respectively abutted against the eccentric blocks (09).

3. The radial plunger pump of claim 2, wherein the through hole (040) is a stepped hole, and the inner wall of the through hole (040) has three step surfaces and is sequentially provided with a first step surface (0400), a second step surface (0401) and a third step surface (0402) along the hole length direction; the outer side wall of the plunger sleeve (06) is provided with a fourth step surface (061), and the fourth step surface (061) is abutted against the first step surface (0400); a sealing gasket (10) is embedded in the through hole (040), and one end face of the sealing gasket (10) is abutted against the second step face (0401); the oil outlet one-way valve (05) comprises a valve seat (050), a spring (051), a valve ball (052) and a circular valve plate (053), the valve seat (050) is integrally columnar, one end of the valve seat is provided with a blind hole (0500), the spring (051) is embedded in the blind hole (0500), one end, far away from the bottom of the blind hole (0500), of the spring (051) is fixed with the valve ball (052), the circular valve plate (053) is coaxially embedded in a through hole (040), one end face of the circular valve plate (053) is abutted to one end face, far away from the second step face (0401), of a sealing washer (10), a valve hole (0530) penetrating through two end faces of the circular valve plate (053) is arranged in the middle, the diameter of the valve ball (052) is larger than the inner diameter of the step valve hole (0530), the valve ball (052) can seal the valve hole (0530), the outer side wall of the valve seat (050) is provided with a fifth step face (0501), the fifth step face (0501) is abutted to the third face (0402) and a sealing ring (11) is sleeved between the fifth step face and the third step valve plate (0402), an oil passing gap is formed between one end face, far away from the sealing gasket (10), of the valve plate and one end face, close to the plunger sleeve (06), of the valve seat (050), and the oil outlet hole (041) corresponds to and is communicated with the oil passing gap.

4. The radial plunger pump according to claim 3, characterized in that a cylindrical plunger cap (12) is fixed at one end of the plunger (08) far away from the plunger sleeve (06), the outer diameter of the plunger cap (12) is larger than that of the plunger (08), a return spring (13) is sleeved on the outer side wall of the plunger sleeve (06), one end of the return spring (13) is abutted with one end face of the valve block (04) far away from the oil outlet one-way valve (05), and the other end of the return spring is abutted with one end face of the plunger cap (12) near the valve block (04).

5. A radial plunger pump according to claim 1, characterized in that an annular lubrication groove (080) is coaxially opened on the outer side wall of the plunger (08), and the lubrication groove (080) is filled with a grease (14).

6. The radial plunger pump of claim 1, wherein a mounting hole (011) penetrating through two end faces of the pump body (01) is formed in the center of the pump body (01), a rotary sealing ring (15), a retainer ring (16) and a plurality of bearings (17) are sequentially embedded in the mounting hole (011) along the length direction of the pump body (01), the rotating shaft (03) sequentially penetrates through an inner ring of the rotary sealing ring (15), an inner ring of the retainer ring (16) and inner rings of the plurality of bearings (17), and an outer side wall of the rotating shaft (03) is in interference fit with the inner rings of the bearings (17) and is in clearance fit with the inner rings of the retainer ring (16).