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Method for manufacturing plunger pair for plunger pump

A manufacturing method and a technology of a plunger pair, which are applied in the manufacture of mechanical parts and the field of plunger pair manufacturing, can solve the problems of cylinder bore bush wear, poor wear resistance of the plunger surface, low fatigue strength and smoothness, and achieve Effects of improving fatigue strength, improving hardenability, and improving fatigue properties

Inactive Publication Date: 2016-06-29
FUXIN HAIPU HYDRAULIC MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Specifically, the technical problem to be solved by the present invention is to provide a manufacturing method for a plunger pair of a plunger pump to solve the problem of poor wear resistance, low fatigue strength and smoothness of the plunger surface of the current plunger pump, and the cylinder The serious technical problem of body hole bushing wear

Method used

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  • Method for manufacturing plunger pair for plunger pump
  • Method for manufacturing plunger pair for plunger pump
  • Method for manufacturing plunger pair for plunger pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for manufacturing a plunger pair for a plunger pump, wherein the plunger pair includes a plunger and a matching cylinder hole bushing, and the plunger is matched with the cylinder hole bushing The gap is 0.006mm, and the plunger and the cylinder hole bushing are made of specific materials.

[0046] Wherein, the specific material used in the plunger is in weight percent, containing C0.21, Mn0.61, Cr5.0, Ni1.2, Mo0.2, V0.15, Ti0.10, Co0.21, B0 .05, P0.02, S0.02, the balance is Fe and unavoidable impurities;

[0047] The specific material used for the cylinder hole bushing contains C0.25, Mn0.71, Cr4.0, Ni1.4, Mo0.2, V0.19, Ti0.20, Co0.21, P0.01, S0.01, the balance is Fe and unavoidable impurities;

[0048] And, on the contact surface of the two, the plunger is plasma-sprayed with a first ceramic coating with a thickness of 0.5mm, and the first ceramic coating contains 13wt% TiO 2 , the balance being Al 2 o 3 ; The cylinder bore liner is plasma sprayed with a...

Embodiment 2

[0057] A method for manufacturing a plunger pair for a plunger pump, wherein the plunger pair includes a plunger and a matching cylinder hole bushing, and the plunger is matched with the cylinder hole bushing The gap is 0.008mm, and the plunger and the cylinder hole bushing are made of specific materials.

[0058] Wherein, the specific material used in the plunger is in weight percent, containing C0.31, Mn0.71, Cr6.0, Ni1.4, Mo0.3, V0.17, Ti0.20, Co0.31, B0 .07, P0.04, S0.04, the balance is Fe and unavoidable impurities;

[0059] The specific material used for the cylinder hole bushing contains C0.35, Mn0.80, Cr4.5, Ni1.6, Mo0.3, V0.21, Ti0.30, Co0.31, P0.03, S0.02, the balance is Fe and unavoidable impurities;

[0060] And, on the contact surface of the two, the plunger is plasma-sprayed with a first ceramic coating with a thickness of 0.7mm, and the first ceramic coating contains 13wt% TiO 2 , the balance being Al 2 o 3 The cylinder bore liner is plasma sprayed with a t...

Embodiment 3

[0069] A method for manufacturing a plunger pair for a plunger pump, wherein the plunger pair includes a plunger and a matching cylinder hole bushing, and the plunger is matched with the cylinder hole bushing The gap is 0.007mm, and the plunger and the cylinder hole bushing are made of specific materials.

[0070] Wherein, the specific material used in the plunger is in weight percent, containing C0.25, Mn0.65, Cr5.5, Ni1.3, Mo0.25, V0.16, Ti0.15, Co0.25, B0 .06, P0.02, S0.02, the balance is Fe and unavoidable impurities;

[0071] The specific material used in the cylinder hole bushing contains C0.30, Mn0.75, Cr4.2, Ni1.5, Mo0.25, V0.20, Ti0.25, Co0.25, P0.02, S0.02, the balance is Fe and unavoidable impurities;

[0072] And, on the contact surface of the two, the plunger is plasma-sprayed with a first ceramic coating with a thickness of 0.6mm, and the first ceramic coating contains 13wt% TiO 2 , the balance being Al 2 o 3 ; The cylinder bore liner is plasma-sprayed with ...

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Abstract

The invention relates to a method for manufacturing a plunger pair for a plunger pump. The method for manufacturing the plunger pair comprises the following steps that S1,a plunger is manufactured; S2, a cylinder body hole lining is manufactured; and S3, the plunger obtained in the S1 and the cylinder body hole lining obtained in the S2 are mounted in a matched manner, and therefore the plunger pair is obtained. The method for manufacturing the plunger pair can be used for manufacturing the plunger pair with the excellent wear-resisting performance through the unique manufacturing steps and unique compositional selecting of the plungers and the cylinder body hole lining, and the good application potentiality and industrialized production value are achieved.

Description

technical field [0001] The invention relates to a manufacturing method of mechanical parts, in particular to a manufacturing method of a plunger pair used in a plunger pump, and belongs to the technical field of plunger pump components. 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, and is widely used in high pressure, large flow and flow adjustment occasions, such as hydraulic presses, engineering machinery and ships. [0003] The plunger pump is a kind of reciprocating pump, which belongs to the volume pump. Its plunger is driven by the eccentric rotation of the pump shaft to reciprocate. Its suction and discharge valves are one-way valv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/18C22C38/08C22C38/12C22C38/14C22C38/10C22C38/32C23C8/26C23C4/134C23C4/11C23C4/06F04B53/14
CPCC22C38/002C22C38/04C22C38/08C22C38/10C22C38/12C22C38/14C22C38/18C22C38/32C23C4/06C23C8/26F04B53/14
Inventor 马鲁楠
Owner FUXIN HAIPU HYDRAULIC MFG
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