Self-lubricating cylinder piston

A self-lubricating, piston technology, used in pistons, coatings, mechanical equipment, etc., can solve problems such as large piston friction, and achieve the effects of improving wear resistance, reducing friction resistance and reducing wear rate.

Inactive Publication Date: 2017-03-08
WUXI MINGSHENG STRONG BLOWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the friction force of the piston is greater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The coating material is powdered using a planetary ball mill and a centrifugal spray granulator. Its process includes:

[0020] The coating material is powdered using a planetary ball mill and a centrifugal spray granulator. Its process includes:

[0021] (1) Ni-coated micron graphite particles and graphene are ball milled on a planetary ball mill for at least 5 minutes;

[0022] (2) 5 minutes before the ball mill stops, add an organic binder to the ball mill to obtain a suspension;

[0023] (3) The suspension is subjected to spray granulation to obtain Ni-coated micron graphite and graphene agglomerated particles.

[0024] The Ni-coated micron graphite and graphene agglomerated particles are sprayed onto the surface of the piston by plasma spraying. For the plasma spraying, the current is 550A, the voltage is 30V, and the flow rate of argon gas is 50L / min.

[0025] The coating on the main shaft of the fan plays a role of solid self-lubrication.

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PUM

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Abstract

The invention discloses a self-lubricating cylinder piston. The surface of the piston is provided with a plasma-sprayed Ni-coated micron graphite and graphene coating with the thickness being 20 microns 30 microns. According to the self-lubricating cylinder piston, the friction coefficient and the wear rate are lowered at the same time through the composite plating, the friction coefficient is low, and compared with a Cr plating, the composite plating is higher in wear resistance. Under various loads, compared with a matrix, the wear rate is lowered by over 50%.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a self-lubricating cylinder piston. Background technique [0002] The piston is a reciprocating part in the cylinder block of an automobile engine. The basic structure of the piston can be divided into top, head and skirt. The top of the piston is the main part of the combustion chamber, and its shape is related to the selected form of the combustion chamber. [0003] The piston works under the conditions of high temperature, high pressure, high speed and poor lubrication. The piston is directly in contact with the high-temperature gas, and the instantaneous temperature can reach above 2500K. Therefore, the heat is severe and the heat dissipation condition is poor, so the temperature of the piston is very high when it is working, and the top is as high as 600-700K, and the temperature distribution is very uneven; the top of the piston bears The gas pressure is very high, es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00C23C4/06C23C4/134
CPCF02F3/00C23C4/06
Inventor 张达明
Owner WUXI MINGSHENG STRONG BLOWER
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