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Axial plunger pump return-stroke mechanism

An axial plunger pump, return technology, applied in pump components, mechanical equipment, variable capacity pump components, etc., can solve the problems affecting the safe and stable operation of the hydraulic system, the failure of the plunger pump, and the pull-off, so as to avoid empty space. The effect of eliminating cavitation, avoiding the reduction of life and prolonging the service life

Active Publication Date: 2013-08-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of structure is relatively complicated, which increases the size of the swash plate. In addition, the shoe pair needs to withstand high-frequency alternating tension and compression stress. It will cause instantaneous failure of the plunger pump, seriously affecting the safe and stable operation of the entire hydraulic system

Method used

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  • Axial plunger pump return-stroke mechanism
  • Axial plunger pump return-stroke mechanism
  • Axial plunger pump return-stroke mechanism

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0023] Such as figure 1 As shown, the plunger 1 of the present invention is stepped, the head 2 of the large-diameter section of the plunger is spherical, the end face 7 of the small-diameter section of the plunger is a plane, and the plunger 1 is provided with an axial through hole 6 .

[0024] Such as figure 2 As shown, the wall of the cylinder 11 of the present invention is provided with a plurality of stepped cylinder holes 12 along the axial direction of the cylinder 11 , and each stepped cylinder hole 12 is distributed along the circumferential direction of the cylinder 11 at intervals.

[0025] Such as image 3 , Figure 4 As shown, the plunger 1 is placed in the stepped cylinder hole 12 of the cylinder body 11, the large-diameter section 3 of the plunger forms a clearance fit with the large-diameter section 13 of the stepped cylinder hole, an...

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Abstract

The invention discloses an axial plunger pump return-stroke mechanism. Plungers of the axial plunger pump return-stroke mechanism are ladder-shaped, ladder-shaped cylinder holes are formed in the walls of a cylinder body in the axial direction of the cylinder body, the ladder-shaped cylinder holes are distributed at intervals in the circumferential direction of the cylinder body, the plungers are arranged in the ladder-shaped cylinder holes, the large-diameter sections of the plungers are in clearance fit with the large-diameter sections of the ladder-shaped cylinder holes, and the small-diameter sections of the plungers are in clearance fit with the small-diameter sections of the ladder-shaped cylinder holes. When the plungers conduct reciprocating motion in the ladder-shaped cylinder holes, an oil chamber is formed between the end face of each small-diameter section of each plunger and the bottom face of each small-diameter section of each ladder-shaped cylinder hole, and an annular region is always formed between the outer wall face of each small-diameter section of each plunger and the inner wall face of each large-diameter section of each ladder-shaped cylinder hole, oil chambers are communicated with kidney-shaped grooves of the cylinder body in a one-to-one correspondence mode, first oil passages are formed in the wall of the cylinder body at intervals, the oil chambers are communicated with annular regions through first oil passages in a one-to-one correspondence mode, and a fluidic resistor is arranged in each first oil passage, and the annular regions are communicated with one another.

Description

technical field [0001] The invention relates to a return mechanism of an axial plunger pump, which belongs to the field of hydraulic transmission. Background technique [0002] The axial piston pump works by using the volume change produced by the parallel reciprocating movement of the plunger in the cylinder bore of the cylinder. When working, the main shaft is driven to drive the cylinder body to rotate. During the rotation of the cylinder body, the plunger sliding in the cylinder hole makes a reciprocating motion under the action of the swash plate to realize oil suction and oil pressure. When the plunger is in the oil-pressing stroke, the high-pressure oil in the plunger chamber pushes the plunger out, making the sliding shoe press the swash plate; but when the plunger is in the oil-absorbing stroke, the pressure in the plunger chamber is negative, which is not enough to make the plunger If the plug protrudes, the plunger cannot automatically return, resulting in poor s...

Claims

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Application Information

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IPC IPC(8): F04B53/00
Inventor 魏建华国凯张成龙
Owner ZHEJIANG UNIV
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