CN116241425A - Axial plunger pump with static pressure bearing structure - Google Patents

Abstract

The invention discloses an axial plunger pump with a static pressure supporting structure, which comprises a radial supporting block, an axial supporting block, a sloping cam plate, a cylinder body and a sliding shoe; the right end face of the swash plate is provided with two axial support block mounting holes, and the circumferential surface of the swash plate is provided with two radial support block mounting holes; the cylinder body adopts a central hole flow distribution mode or a sliding shoe flow distribution mode to introduce a medium into the axial support block mounting holes and the radial support block mounting holes, and the medium enters into the hydraulic reverse thrust generated in the end surface groove of the axial support block and the axial thrust of the plunger is balanced together by the composite support formed by the right end surface of the swash plate and the supporting force of the axial friction disc. The medium enters into the end face groove of the radial supporting block to generate hydraulic reverse thrust, and forms a composite support together with the right end bearing of the swash plate to balance the radial force transmitted to the swash plate by the plunger. The composite support can distribute the load between the friction pairs according to the working condition design, so that the friction resistance of the swash plate is effectively reduced, the abrasion of the sliding shoes is weakened, and the mechanical efficiency and the service life are improved.

Description

Axial plunger pump with static pressure bearing structure

Technical Field

The invention relates to the field of axial plunger pumps, in particular to an axial plunger pump with a static pressure supporting structure, which is suitable for working conditions with higher working pressure.

Background

The swash plate type axial plunger pump is widely applied to hydraulic systems of various engineering machines due to the advantages of high rated working pressure, high power density, convenient variable adjustment and the like, and the performance and reliability of the swash plate type axial plunger pump can directly influence the performance and reliability of the hydraulic systems. In an axial plunger pump, a swash plate pushes plunger shoes to perform high-speed reciprocating motion, the shoes are tightly pressed on the swash plate by hydraulic pressure, so that great axial force and radial force can be generated on the swash plate, the swash plate is often supported by adopting a swash plate bearing for balancing the axial force and the radial force received by the swash plate, the axial force and the radial force received by the swash plate are counteracted, but the bearing size is relatively large due to large load, so that occupied space is large, the selection is difficult, in addition, in the occasion of water media and the like, corrosion and rust are easy to occur on steel bearings, and the strength of the ceramic bearings is insufficient under the high-pressure working condition. The static pressure composite supporting structure is suitable for high-pressure working conditions, is suitable for various mediums such as hydraulic oil, water or other liquids with lower viscosity, introduces the mediums into a friction pair of a sliding shoe and a sliding shoe friction disc or a cylinder body center hole, and uses static pressure support to offset most of compaction force, so that bearing load is greatly reduced, friction force born by a swash plate is reduced, abrasion of the sliding shoe is weakened, mechanical efficiency and service life are improved, in addition, the thickness of a liquid film between a supporting block and an axial friction disc or a shell can be self-adaptively adjusted according to the pressure of the mediums, and meanwhile, the defects of difficult bearing shape selection and insufficient installation size are avoided under the working condition of high pressure.

Disclosure of Invention

The invention aims to overcome the inherent defects of the prior swash plate type axial plunger pump that a swash plate is supported by adopting a swash plate bearing, the occupied space is large due to large load and relatively large bearing size, moreover, the steel bearing is easy to corrode and rust in the occasion of water medium and the like, and the strength of the ceramic bearing is insufficient under the high-pressure working condition.

The aim of the invention is realized by the following technical scheme: an axial plunger pump with a static pressure supporting structure comprises a shell, a radial supporting block, an axial supporting block, a sloping cam plate bearing, an axial friction plate, a return disc, a cylinder body and a sliding shoe;

the swash plate is coaxially arranged with the cylinder body, the left end face of the swash plate is tightly contacted with the right end face of the sliding shoe, and the right end face of the swash plate is tightly contacted with the axial friction disc; a swash plate bearing is arranged between the right side surface of the swash plate and the shell; the plunger in the cylinder body is connected with the sliding shoe;

the return disc is a cylindrical ring, the right end face of the return disc is tightly contacted with the step face of the sliding shoe, and the central hole of the cylindrical ring of the return disc is in clearance fit with the side face of the sliding shoe;

the right end face of the swash plate is provided with two axial support block mounting holes, and the circumferential surface of the swash plate is provided with two radial support block mounting holes; the swash plate is provided with a liquid pipeline which is communicated with the axial support block mounting hole and the radial mounting block mounting hole; the axial supporting block and the radial supporting block are respectively and correspondingly arranged in the axial supporting block mounting hole and the radial supporting block mounting hole; the axial supporting blocks and the radial supporting blocks are provided with liquid through holes and end face grooves; the end face of the radial supporting block is tightly contacted with the inner wall of the shell; the end face of the axial supporting block is tightly contacted with the end face of the axial friction disc;

the cylinder body adopts a central hole flow distribution mode or a sliding shoe flow distribution mode to introduce a medium into an axial support block mounting hole and a radial support block mounting hole through a liquid passage pipeline of the swash plate, the central hole flow distribution mode is that a hole is formed in the center of the cylinder body and is communicated with the liquid passage pipeline of the swash plate, and an external medium is introduced into end face grooves of the axial support block and the radial support block through the liquid passage pipeline to form a static pressure support; the sliding shoe flow distribution mode is that a sliding shoe is provided with a sliding shoe opening, a sliding shoe friction disc with a corresponding small hole is arranged between the sliding shoe and the left end of the sloping cam plate, and the sliding shoe friction disc is communicated with a sloping cam plate liquid-through pipeline through the small hole of the sliding shoe friction disc, so that a medium is introduced into the end face grooves of the axial supporting block and the radial supporting block to form a static pressure support.

Further, when a central hole flow distribution mode is adopted, the cylinder body is a center Kong Gangti, a central liquid through hole is formed, and a central flow distribution shaft is arranged in the central liquid through hole; the sloping cam plate is a center Kong Xiepan and is provided with a distribution groove; the central distributing shaft is always pressed on the distributing groove through a central distributing spring;

the center Kong Gangti is provided with a center spherical hinge spring which always presses the center spherical hinge on the return disc, and the center spherical hinge and a center hole of the return disc are coaxial;

the central distributing shaft is provided with a liquid through hole; the liquid passage pipeline of the central hole swash plate communicates the liquid passage hole of the central distributing shaft with the axial support block mounting hole and the radial mounting block mounting hole.

Further, a liquid suction pipeline is arranged on the circumferential surface of the center Kong Gangti and is communicated with a liquid suction port of the shell, a liquid discharge pipeline is arranged on the end surface and is communicated with a central liquid through hole of the cylinder body with a central hole, and a liquid suction check valve and a liquid discharge check valve are correspondingly arranged in the liquid suction pipeline and the liquid discharge pipeline respectively.

Further, eight plunger holes are formed in the central hole cylinder body, a plunger sleeve is arranged in the plunger holes, and the plunger is arranged in the plunger sleeve and is in spherical hinge connection with the sliding shoes.

Further, an end cover is fixedly arranged on the shell, and an axial thrust disc of the axial plunger pump is tightly contacted with the end cover.

Further, the axial plunger pump is also provided with a mechanical seal bearing coaxial with the swash plate, and the end face of the mechanical seal bearing is contacted with the axial thrust plate.

Further, the axial plunger pump is further provided with a radial supporting sealing ring and an axial supporting sealing ring, and the axial supporting sealing ring and the radial supporting sealing ring are respectively arranged in the sealing grooves at the bottoms of the axial supporting block and the radial supporting block.

Further, the swash plate bearing is arranged on the swash plate, and the axial support block and the friction pair on the right end surface of the swash plate form an axial composite support structure; the radial support block and the swash plate bearing form a radial composite support structure, and the swash plate bearing can be replaced by a sliding bearing.

Further, when the slipper flow distribution mode is adopted, the swash plate is a slipper hole flow distribution swash plate, a liquid passage on the slipper hole flow distribution swash plate is a flow distribution waist-shaped groove, and the slipper hole flow distribution swash plate is provided with two axial support block mounting holes and two radial support block mounting holes; the right end face of the sliding shoe is contacted with the left end face of the sliding shoe friction disc; the sliding shoe friction disc and the return disc are concentric discs; the sliding shoe friction disc is provided with eight liquid through small holes coaxial with the central hole of the cylindrical ring of the return disc; the right end surface of the sliding shoe friction disc is coaxial with the sliding shoe hole flow distribution sloping cam plate and is in end surface contact;

the flow distribution waist-shaped groove is provided with two liquid through holes which are respectively communicated with the two axial support block mounting holes and the two radial support block mounting holes; the axial support block mounting holes and the radial support block mounting holes are respectively provided with an axial support block and a radial support block correspondingly; the axial supporting blocks and the radial supporting blocks are respectively provided with a liquid through hole and an end face groove; the inner wall of the shell is tightly contacted with the end face of the radial supporting block; the end face of the axial friction disc is tightly contacted with the end face of the axial supporting block, and the sliding shoe flow distribution static pressure supporting structure is formed at the moment.

Further, an axial support sealing ring is arranged in a sealing groove at the bottom of the axial support block; and a radial support sealing ring is arranged in the sealing groove at the bottom of the radial support block.

The invention has the beneficial effects that:

(1) According to the invention, the medium led from the swash plate enters the axial support blocks and the end face grooves of the radial support blocks and generates hydraulic reverse thrust, and axial and radial static pressure supports are formed between the friction pairs, so that the axial force and the radial force applied to the swash plate are counteracted, the stress of the swash plate is effectively reduced, the abrasion of the sliding shoes is weakened, the mechanical efficiency is increased, and the service life is prolonged.

(2) The invention avoids the defects that the swash plate is supported by adopting the swash plate bearing only under the high-pressure working condition, the bearing size is relatively large and the shape is difficult to select due to large load.

(3) The invention avoids the limitation that the steel bearing is easy to corrode and rust in the occasion of water medium and the like, and the ceramic bearing has insufficient strength under the high-pressure working condition, thereby being suitable for various mediums such as hydraulic oil, water or other liquids with lower viscosity.

(4) The thickness of the liquid film between the support block and the axial friction disk or the shell can be adaptively adjusted according to the pressure of the medium.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic view of the center Kong Xiepan assembly of the present invention, FIG. 1;

FIG. 3 is a schematic view of the center Kong Xiepan assembly of the present invention, FIG. 2;

FIG. 4 is a schematic view of a static pressure support structure of a slipper block of the present invention;

FIG. 5 is a schematic view of a radial support assembly of the present invention;

FIG. 6 is a schematic view of an axial support assembly according to the present invention;

FIG. 7 is a schematic view of a slipper hole distribution swash plate assembly of the present invention;

FIG. 8 is a schematic view of a slipper friction disc assembly of the present invention;

the device comprises a shell 1, a radial support sealing ring 2, a radial support block 3, an end cover 4, an axial support sealing ring 5, an axial support block 6, a mechanical seal bearing 7, an axial thrust disk 8, a center Kong Xiepan, a distribution groove 9.1, an axial support block mounting hole 9.2, a radial support block mounting hole 9.3, an axial friction disk 10, a return disk 11, a sliding shoe 12, a plunger 13, a plunger sleeve 14, a center Kong Gangti, a liquid discharge pipeline 15.1, a liquid suction pipeline 15.2, a liquid suction check valve 16, a liquid discharge check valve 17, a center spherical hinge 18, a center distribution shaft 19, a center spherical hinge spring 20, a center distribution spring 21, a sliding shoe friction disk 26, a sliding shoe friction disk small hole 26.1, a cylinder 27, a sliding shoe hole distribution swash plate 28, a distribution waist-shaped groove 28.1, a liquid through small hole 28.2 and a bearing 31.

Detailed Description

The invention is further described below with reference to the drawings and examples. The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Fig. 1-3 show an axial plunger pump with a static pressure supporting structure according to the invention when a central hole flow distribution mode is adopted, and in the shown embodiment, the axial plunger pump comprises a shell 1, a radial supporting sealing ring 2, a radial supporting block 3, an end cover 4, an axial supporting sealing ring 5, an axial supporting block 6, a mechanical sealing bearing 7, an axial thrust disc 8, a center Kong Xiepan 9, a flow distribution groove 9.1, an axial supporting block mounting hole 9.2, a radial supporting block mounting hole 9.3, an axial friction disc 10, a return disc 11, a sliding shoe 12, a plunger 13, a plunger sleeve 14, a center Kong Gangti, a liquid discharge pipeline 15.1, a liquid suction pipeline 15.2, a liquid suction one-way valve 16, a liquid discharge one-way valve 17, a center spherical hinge 18, a center flow distribution shaft 19, a center spherical hinge spring 20, a center flow distribution spring 21 and a swash plate bearing 31.

The center Kong Xiepan is coaxially arranged with the center Kong Gangti, the left end face of the center Kong Xiepan is tightly contacted with the right end face of the sliding shoe 12, and the right end face of the center Kong Xiepan is tightly contacted with the axial friction disc 10; the plunger 13 in the center Kong Gangti is connected to the shoe 12; a swash plate bearing 31 is arranged between the right end side surface of the center Kong Xiepan and the shell 1;

the center Kong Gangti is provided with a center liquid through hole which is communicated with the liquid discharge pipeline 15.1; the central hole sloping cam plate 9 is provided with a distribution groove 9.1; the central distributing shaft 19 is arranged in a central liquid through hole of the center Kong Gangti and is always pressed on the distributing groove 9.1 by the central distributing spring 21; the center spherical hinge 18 is coaxial with the center hole of the return disc 11 and is always pressed on the return disc 11 by the center spherical hinge spring 20, and the center spherical hinge spring 20 is arranged on the center Kong Gangti;

the right end face of the center Kong Xiepan is provided with two axial support block mounting holes 9.2, and the circumferential face is provided with two radial support block mounting holes 9.3; the central distributing shaft 19 is provided with a liquid through hole; the central hole swash plate 9 is provided with a liquid passage pipeline for communicating a liquid passage hole of the central distributing shaft 19 with the axial support block mounting holes 9.2 and the radial mounting block mounting holes 9.3; the axial support block 6 and the radial support block 3 are respectively arranged in an axial support block mounting hole 9.2 and a radial support block mounting hole 9.3; the axial support sealing ring 5 and the radial support sealing ring 2 are respectively arranged in sealing grooves at the bottoms of the axial support block 6 and the radial support block 3;

the axial supporting blocks 9 and the radial supporting blocks 3 are provided with liquid through holes and end face grooves; the end face of the radial supporting block 3 is tightly contacted with the inner wall of the shell 1; the end face of the axial supporting block 9 is tightly contacted with the end face of the axial friction disk 10; the circumferential surface of the center Kong Gangti is provided with a liquid suction pipeline 15.2 which is communicated with a liquid suction port of the shell 1, the end surface is provided with a liquid discharge pipeline 15.1 which is communicated with a center liquid through hole of the center Kong Gangti, and the liquid suction one-way valve 16 and the liquid discharge one-way valve 17 are arranged in the liquid suction pipeline 15.2 and the liquid discharge pipeline 15.1; the center Kong Gangti is provided with eight plunger holes, the plunger sleeve 14 is arranged in the plunger holes, and the plunger 13 is arranged in the plunger sleeve 14 and is in spherical hinge connection with the sliding shoe 12;

the return disc 11 is a cylindrical ring, the right end surface of the return disc 11 is tightly contacted with the step surface of the sliding shoe 12, and the central hole of the cylindrical ring of the return disc 11 is in clearance fit with the side surface of the sliding shoe 12; the end cover 4 is fixedly arranged with the shell 1, and the axial thrust disc 8 is tightly contacted with the end cover 4; the mechanical seal bearing 7 is coaxial with the center Kong Xiepan, and the end face is contacted with the axial thrust disk 8.

When the pump works under the high-pressure working condition, the center Kong Xiepan 9 is driven by an external motor to rotate, the piston shoes 12 in the low-pressure area drive the plungers 13 to extend out of the center Kong Gangti 15 in the process of moving from the outer dead center to the inner dead center of the central hole swash plate 9, the inner volume of the plunger holes of the center Kong Gangti is increased, so that external media is sucked into the liquid suction pipeline 15.2, the piston shoes 12 in the high-pressure area drive the plungers 13 to retract out of the center Kong Gangti in the process of moving from the inner dead center to the outer dead center of the central hole swash plate 9, the inner volume of the plunger holes of the center Kong Gangti is reduced, so that media is discharged along the liquid discharge pipeline 15.1, high-pressure media is discharged from the liquid discharge pipeline 15.1 along the central liquid through holes of the center Kong Gangti 15, the hydraulic fluid enters the axial support block mounting holes 9.2 and the radial support block mounting holes 9.1 through the central fluid distribution shaft 19, the axial support block 6 and the radial support block 3 are respectively pressed on the wall surfaces of the axial friction disk 10 and the shell 1 through medium pressure, a liquid film is formed between the axial friction disk 10 and the shell 1 through the fluid passing holes of the axial support block 6 and the radial support block 3, the thickness of the liquid film can be adaptively adjusted according to the pressure of the medium, axial and radial pressure supports are formed, hydraulic thrust is generated to offset the axial force and the radial force received by the center Kong Xiepan, the swash plate stress is effectively reduced, the abrasion of a sliding shoe is weakened, the mechanical efficiency is improved, and the service life is prolonged. Moreover, the defects that the swash plate is supported by adopting the swash plate bearing under the high-pressure working condition, the bearing size is relatively large and the type is difficult to select due to large load are avoided.

Example 2

FIGS. 4-8 illustrate an axial piston pump incorporating the hydrostatic support structure of the present invention when in a slipper flow configuration, and in the illustrated embodiment, include a slipper friction plate 26, a cylinder 27, a slipper bore flow distribution swash plate 28, a flow distribution waist-shaped groove 28.1, and a through-flow orifice 28.2;

when a slipper flow distribution mode is adopted, the slipper hole flow distribution swash plate 28 replaces the center Kong Xiepan; the cylinder 27 replaces the center Kong Gangti; the right end face of the sliding shoe 12 is contacted with the left end face of the sliding shoe friction disc 26; the slipper friction disc 26 and the return disc 11 are concentric discs; the sliding shoe friction disc 26 is provided with eight small holes 26.1 for the sliding shoe friction disc, which are coaxial with the central hole of the cylindrical ring of the return disc 11; the right end surface of the slipper friction disc 26 is coaxial with the slipper hole flow distribution swash plate 28 and is in end surface contact; the liquid-passing pipeline on the slipper hole distributing sloping cam plate 28 is a liquid-passing small hole 28.2 and a distributing waist-shaped groove 28.1;

the flow distribution waist-shaped groove 28.1 is provided with two liquid through small holes 28.2 which are respectively communicated with two axial support block mounting holes and two radial support block mounting holes; the axial support block mounting holes and the radial support block mounting holes are respectively correspondingly provided with an axial support block 6 and a radial support block 3. The axial support sealing ring 5 and the radial support sealing ring 2 are respectively arranged in sealing grooves at the bottoms of the axial support block 6 and the radial support block 3.

The axial supporting blocks 6 and the radial supporting blocks 3 are respectively provided with a liquid through hole and an end surface groove; the inner wall of the shell 1 is tightly contacted with the end face of the radial supporting block; the end face of the axial friction disc 10 is tightly contacted with the end face of the axial supporting block, a liquid hole is not formed in the center of the cylinder body 27, and other structures and functions are similar to those of the embodiment 1, and the sliding shoe is provided with a static pressure supporting structure.

When the slipper flow distribution static pressure supporting structure is used in a pressurized axial plunger pump, a medium enters an end face groove of the axial supporting block 6 through the slipper hole flow distribution swash plate 28 to form an axial static pressure supporting with the axial friction disk 10, and enters an end face groove of the radial supporting block 3 through the slipper hole flow distribution swash plate 28 to form a radial static pressure supporting with the shell 1, so that the static pressure supporting is realized, and the axial force and the radial force born by the swash plate are counteracted.

The above-described embodiments are intended to illustrate the present invention, not to limit it, and any modifications and variations made thereto are within the spirit of the invention and the scope of the appended claims.

Claims (10)

1. An axial plunger pump with a static pressure supporting structure is characterized by comprising a shell, a radial supporting block, an axial supporting block, a swash plate bearing, an axial friction plate, a return plate, a cylinder body and a sliding shoe;

the swash plate is coaxially arranged with the cylinder body, the left end face of the swash plate is tightly contacted with the right end face of the sliding shoe, and the right end face of the swash plate is tightly contacted with the axial friction disc; a swash plate bearing is arranged between the right side surface of the swash plate and the shell; the plunger in the cylinder body is connected with the sliding shoe;

the return disc is a cylindrical ring, the right end face of the return disc is tightly contacted with the step face of the sliding shoe, and the central hole of the cylindrical ring of the return disc is in clearance fit with the side face of the sliding shoe;

the right end face of the swash plate is provided with two axial support block mounting holes, and the circumferential surface of the swash plate is provided with two radial support block mounting holes; the swash plate is provided with a liquid pipeline which is communicated with the axial support block mounting hole and the radial mounting block mounting hole; the axial supporting block and the radial supporting block are respectively and correspondingly arranged in the axial supporting block mounting hole and the radial supporting block mounting hole; the axial supporting blocks and the radial supporting blocks are provided with liquid through holes and end face grooves; the end face of the radial supporting block is tightly contacted with the inner wall of the shell; the end face of the axial supporting block is tightly contacted with the end face of the axial friction disc;

the cylinder body adopts a central hole flow distribution mode or a sliding shoe flow distribution mode to introduce a medium into an axial support block mounting hole and a radial support block mounting hole through a liquid passage pipeline of the swash plate, the central hole flow distribution mode is that a hole is formed in the center of the cylinder body and is communicated with the liquid passage pipeline of the swash plate, and an external medium is introduced into end face grooves of the axial support block and the radial support block through the liquid passage pipeline to form a static pressure support; the sliding shoe flow distribution mode is that a sliding shoe is provided with a sliding shoe opening, a sliding shoe friction disc with a corresponding small hole is arranged between the sliding shoe and the left end of the sloping cam plate, and the sliding shoe friction disc is communicated with a sloping cam plate liquid-through pipeline through the small hole of the sliding shoe friction disc, so that a medium is introduced into the end face grooves of the axial supporting block and the radial supporting block to form a static pressure support.

2. The axial plunger pump with the static pressure supporting structure according to claim 1, wherein when a central hole flow distribution mode is adopted, the cylinder body is a center Kong Gangti and is provided with a central liquid through hole, and a central flow distribution shaft is arranged in the central liquid through hole; the sloping cam plate is a center Kong Xiepan and is provided with a distribution groove; the central distributing shaft is always pressed on the distributing groove through a central distributing spring;

the center Kong Gangti is provided with a center spherical hinge spring which always presses the center spherical hinge on the return disc, and the center spherical hinge and a center hole of the return disc are coaxial;

the central distributing shaft is provided with a liquid through hole; the liquid passage pipeline of the central hole swash plate communicates the liquid passage hole of the central distributing shaft with the axial support block mounting hole and the radial mounting block mounting hole.

3. The axial plunger pump with the static pressure supporting structure according to claim 2, wherein a liquid suction pipeline is arranged on the peripheral surface of the center Kong Gangti and is communicated with a liquid suction port of the shell, a liquid discharge pipeline is arranged on the end surface and is communicated with a central liquid through hole of the cylinder body with a central hole, and a liquid suction check valve and a liquid discharge check valve are correspondingly arranged in the liquid suction pipeline and the liquid discharge pipeline respectively.

4. The axial plunger pump with the static pressure supporting structure according to claim 2, wherein the cylinder body with the central hole is provided with eight plunger holes, a plunger sleeve is arranged in the plunger holes, and the plunger is arranged in the plunger sleeve and is in spherical hinge connection with the sliding shoe.

5. The axial plunger pump with the static pressure supporting structure according to claim 2, wherein an end cover is fixedly arranged on the shell, and an axial thrust disc of the axial plunger pump is tightly contacted with the end cover.

6. An axial piston pump with hydrostatic support structure as defined in claim 5, further comprising a mechanical seal bearing concentric with the swash plate, the end face of which is in contact with the axial thrust plate.

7. The axial piston pump with static pressure support structure of claim 2, further comprising a radial support seal ring and an axial support seal ring, the axial support seal ring and the radial support seal ring being mounted in seal grooves in the bottoms of the axial support block and the radial support block, respectively.

8. The axial plunger pump with the static pressure supporting structure according to claim 1, wherein the swash plate bearing is arranged on a swash plate, and the axial supporting block and a friction pair on the right end surface of the swash plate form an axial composite supporting structure; the radial support block and the swash plate bearing form a radial composite support structure, and the swash plate bearing can be replaced by a sliding bearing.

9. The axial plunger pump with the static pressure supporting structure according to claim 1, wherein when a slipper flow distribution mode is adopted, the swash plate is a slipper hole flow distribution swash plate, a liquid through pipeline on the slipper hole flow distribution swash plate is a flow distribution waist-shaped groove, and two axial supporting block mounting holes and two radial supporting block mounting holes are formed in the slipper hole flow distribution swash plate; the right end face of the sliding shoe is contacted with the left end face of the sliding shoe friction disc; the sliding shoe friction disc and the return disc are concentric discs; the sliding shoe friction disc is provided with eight liquid through small holes coaxial with the central hole of the cylindrical ring of the return disc; the right end surface of the sliding shoe friction disc is coaxial with the sliding shoe hole flow distribution sloping cam plate and is in end surface contact;

the flow distribution waist-shaped groove is provided with two liquid through holes which are respectively communicated with the two axial support block mounting holes and the two radial support block mounting holes; the axial support block mounting holes and the radial support block mounting holes are respectively provided with an axial support block and a radial support block correspondingly; the axial supporting blocks and the radial supporting blocks are respectively provided with a liquid through hole and an end face groove; the inner wall of the shell is tightly contacted with the end face of the radial supporting block; the end face of the axial friction disc is tightly contacted with the end face of the axial supporting block, and the sliding shoe flow distribution static pressure supporting structure is formed at the moment.

10. The axial plunger pump with the static pressure supporting structure according to claim 9, wherein an axial supporting sealing ring is installed in a sealing groove at the bottom of the axial supporting block; and a radial support sealing ring is arranged in the sealing groove at the bottom of the radial support block.

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