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Plunger of plunger pump and oblique-axis plunger pump provided with plunger

A plunger pump and oblique shaft technology, which is applied to the components of the pumping device for elastic fluids, pumps, multi-cylinder pumps, etc., can solve the problems of easy eccentric wear, uneven oil film, and difficulty in guaranteeing the machining accuracy of the plunger. , to reduce the contact specific pressure, solve the difficulty in guaranteeing the machining accuracy, and improve the service life and mechanical efficiency.

Pending Publication Date: 2018-04-20
SHAOYANG VICTOR HYDRAULICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to provide a plunger of an inclined-axis plunger pump and an inclined-axis plunger pump having the plunger, which can make a good connection between the plunger and the cylinder. The oil film forms a dynamic pressure lubrication and has good sealing performance, which effectively solves the problems of difficult to guarantee the machining accuracy of the plunger, uneven oil film and easy partial wear, and can improve the service life and mechanical efficiency of the plunger

Method used

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  • Plunger of plunger pump and oblique-axis plunger pump provided with plunger
  • Plunger of plunger pump and oblique-axis plunger pump provided with plunger
  • Plunger of plunger pump and oblique-axis plunger pump provided with plunger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, on the basis of aforementioned basic scheme, as figure 2 with image 3 In the plunger of the inclined-axis plunger pump shown, the oil groove 6 is an annular oil groove provided on the side of the sealing section 3 , and the annular oil groove communicates with the axial through hole 4 through several radially arranged second damping holes 7 . Optionally, there are more than two second damping holes 7 communicating with the annular oil groove, and they are uniformly arranged at equal circumferential angles on the same section. Optionally, there are more than two second damping holes 7 communicating with the annular oil groove, which are arranged symmetrically on the same cross section. Optionally, there are more than two rows of the annular oil groove and the second damping hole 7 communicating with it.

Embodiment 2

[0029] Embodiment 2, on the basis of aforementioned basic scheme, as Figure 4 with Figure 5 In the plunger of the inclined-axis plunger pump shown, the oil groove 6 is arranged on the side of the sealing section 3 along the axial direction, and the oil groove 6 communicates with the hydraulic oil chamber of the cylinder through the second damping hole 7; the oil groove 6 is arranged along the sealing section The sides of 3 are arranged uniformly or symmetrically by equal circumferential angles. When the plunger is in the oil pressure stroke, the oil in the hydraulic oil chamber of the cylinder enters the oil groove 6 through the second damping hole 7, the damping of each second damping hole 7 is the same, and the flow rate and pressure difference through the second damping hole 7 are the same , the support force generated by the oil on the side of the plunger is uniformly distributed on the side of the plunger, so that the eccentricity between the plunger and the cylinder i...

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PUM

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Abstract

The invention provides a plunger of a plunger pump and an oblique-axis plunger pump provided with the plunger. The plunger comprises rod bodies (1). A ball (2) matched with a piston shoe is arranged at one end of each rod body (1), and a sealed section (3) in contact with a cylinder barrel is arranged at the other end of each rod body (1). The rod bodies (1) are tapered rods, and the tapered rodsbecome thinner gradually towards the balls (2). Each rod body (1) is provided with an axial through hole (4). The end, close to the corresponding ball (2), of each axial through hole (4) is provided with a first damping hole (5). The side face of each sealed section (3) is provided with at least one oil groove (6). Each oil groove (6) communicates with the corresponding axial through hole (4) or ahydraulic oil cavity (8) of the cylinder barrel through a second damping hole (7). According to the technical scheme, a good oil film can be formed between the plunger and the cylinder barrel, so that dynamic-pressure lubrication is formed, and good airtightness is achieved; the problems that the machining precision of plungers is difficult to ensure, oil films are nonuniform, and eccentric wearis likely to be caused are effectively solved; and the service life of the plunger can be prolonged, and the mechanical efficiency of the plunger can be improved.

Description

technical field [0001] The invention relates to the technical field of plunger type hydraulic pumps, in particular to a plunger of an inclined-axis type plunger pump; the invention also relates to an inclined-axis type plunger pump. Background technique [0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to realize oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. It is widely used in high pressure, large flow and occasions where the flow needs to be adjusted, such as hydraulic presses, engineering machinery and ships. [0003] With the increasing demand for plunger hydraulic pumps in fields such as construction machinery, plastic machinery, machine tools and agricultural machinery, it is urgent to improve the service life ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B1/12F04B1/14F04B53/18F04B53/14
CPCF04B1/122F04B1/124F04B1/146F04B53/14F04B53/18
Inventor 粟武洪
Owner SHAOYANG VICTOR HYDRAULICS