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Plane static pressure supporting sliding plate pair structure and swash plate plunger pump or motor comprising same

A technology of hydrostatic support and auxiliary structure, which is applied in the direction of variable displacement pump components, reciprocating piston engines, components of pumping devices for elastic fluids, etc. It can reduce the eccentric wear of the sliding shoe pair, reduce the wear and improve the working reliability.

Pending Publication Date: 2019-07-30
钟彪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 2. During high-speed motion, the sliding shoe is subjected to the comprehensive action of the centrifugal moment caused by the circumferential movement and the frictional moment generated by the rotation of the cylinder, which will cause the sliding shoe to overturn relative to the surface of the swash plate, thereby forming a wedge-shaped oil film and causing the sliding The boot wears sideways, which destroys the normal work of the slide boot
[0008] 3. With the increase of pressure and speed, when the lubricity of the oil and the wear resistance of the friction pair material are not good enough, due to the existence of residual pressing force, there will be more serious wear between the sliding shoe and the swash plate friction pair, There is even a phenomenon of "burning boots"
[0009] 4. Each sliding shoe and return plate are independent components, and they are also high-precision processing components. Therefore, the processing volume is large and the processing requirements are high
[0010] 5. Since the sliding shoe and the return plate are relatively independent components with a certain gap, there are friction, pushing, impact and other phenomena between the two, and it is easy to make a large mechanical noise

Method used

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  • Plane static pressure supporting sliding plate pair structure and swash plate plunger pump or motor comprising same
  • Plane static pressure supporting sliding plate pair structure and swash plate plunger pump or motor comprising same
  • Plane static pressure supporting sliding plate pair structure and swash plate plunger pump or motor comprising same

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Embodiment 1

[0046] Such as Figure 3-8 , shows an embodiment of the planar hydrostatic sliding plate pair structure of the present invention and a swash plate type plunger pump including the structure. In the preferred embodiment shown, the swash plate type piston pump is supported by a shaft The swash plate type plunger pump includes a main shaft 10, a housing 30, a first bearing 21, a second bearing 22, a swash plate 40, a sliding plate 50, a plunger 70, a cylinder body 80, and a flow plate 90. and a central spring 100. The main shaft axis 10C of the main shaft 10 coincides with the cylinder central axis 80C of the cylinder 80, and the central spring 100 presses the sliding plate 50 through the ball joint 103, and the sliding plate 50 faces the cylinder A plurality of plunger ball sockets 58 are arranged on the circumferential direction of the end surface of one side of the 80 relative to the plunger 70, and the ball head of the plunger 70 is fixed on the plunger ball socket 58 of the ...

Embodiment 2

[0068] Such as Figure 9-Figure 11 The swash plate type plunger pump or motor showing Embodiment 2 of the present invention differs from Embodiment 1 in the way of supporting the cylinder and the difference in the structure of the slide plate pair and the way of supporting the center spring due to the difference in the way of supporting the cylinder. .

[0069] Such as Figure 9 As shown, the swash plate type plunger pump in this embodiment is presented in the form of a bearing-supported cylinder structure, and the swash plate type piston pump includes a main shaft 10, a housing 30, a first bearing 21, a second bearing 22, and Plate 40 , slide plate 50 , plunger 70 , cylinder 80 , valve plate 90 and center spring 100 . The axis 10C of the main shaft coincides with the central axis 80C of the cylinder body. One end of the main shaft 10 is supported on the first bearing 21, and the other end passes through the flow plate 90 and is keyed to the cylinder body 80. The cylinder T...

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Abstract

The invention discloses a plane static pressure supporting sliding plate pair structure and a swash plate plunger pump or a motor comprising the same. The sliding plate pair structure comprises a swash plate and a sliding plate, the sliding plate is of an integral structure, a plurality of plunger ball sockets are arranged on the end surface of the sliding plate, a static pressure supporting planeis arranged on the end face, opposite to the swash plate, of the sliding plate, the static pressure supporting plane is supported on the swash plate and is in sliding fit with the swash plate, oil passing holes in communication with the plunger ball sockets and the static pressure supporting plane are formed in the sliding plate, and the oil passing holes are used for introducing oil liquid intothe part between the static pressure supporting plane and the end face of the swash plate, so that the static pressure supporting plane and the end face of the swash plate form a static pressure oil film support in clearance fit. According to the sliding plate pair structure, a plurality of scattered sliding shoe structures are eliminated, an integral sliding plate structure is adopted, the sliding plate structure can prevent eccentric abrasion caused by centrifugation of sliding shoes and can prevent the fracture of a return plate, abrasion of the motion pair surface can be reduced, mechanical noise can be reduced, and the working reliability and the working life of a swash plate plunger pump or the motor can be improved.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transmission and control, and in particular relates to a plane static pressure supporting sliding plate pair structure and a swash plate type plunger pump or motor including the structure. Background technique [0002] Axial piston pumps and motors are one of the most widely used hydraulic components in modern hydraulic transmission, among which hingeless inclined axis pumps and sliding shoe swash plate axial piston pumps are currently the most widely used and most important two. Axial piston pumps. Compared with the inclined shaft pump, the swash plate plunger pump has a simpler and more compact structure, smaller volume and lighter weight. The stepless variable is realized through the swing of the swash plate. The variable is more convenient, there are more variable forms, and the variable inertia is small. The variable response speed is relatively fast, so the swash plate plunger pump has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B1/20F04B53/00F03C1/253
CPCF04B1/2014F03C1/0644
Inventor 钟彪
Owner 钟彪