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Low-friction piston

A low-friction, piston technology, applied in the direction of pistons, piston rings, cylindrical pistons, etc., can solve the problems of high friction coefficient between piston rings and cylinder liners, shorten the service life of sealing rings, and leakage of balancers, etc., and achieve good air tightness , Extended service life and small leakage

Active Publication Date: 2011-01-05
WUXI TUOFA AUTOMATIC CONTROL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the piston was generally made of cast iron, and the piston ring and sealing ring were installed in the groove on the piston. The friction coefficient between the piston ring and the cylinder liner was relatively large. Under the condition of high speed and no lubrication, a high temperature rise would occur. Significantly shorten the service life of the sealing ring, causing the balancer to leak and fail

Method used

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0011] As shown in the figure, the low-friction piston includes a cylinder liner 1, a piston rod 2, a piston plate 3, a support frame 4, a mounting nut 5 and a mounting washer 6, and the piston rod 2 passes through the mounting nut 5 and the mounting washer 6 A support frame 4 is fixedly installed, and a piston sheet 3 is arranged on the support frame 4. It is characterized in that: an annular groove 7 is provided on the outer wall of the piston sheet 3 along its circumference, and the annular groove 7 is open. , the annular groove 7 is filled with grease 8, and the notch of the annular groove 7 faces away from the axis of the piston rod 2; the piston plate 3 in the annular groove 7 is integrally provided with several annular ribs 9. The annular rib 9 is arranged along the circumference of the piston plate 3; a protective film layer 10 is adhered to the piston ...

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PUM

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Abstract

The invention relates to a low-friction piston which comprises a cylinder sleeve, a piston rod, a piston sheet, a supporting frame, an installing nut and an installing gasket according to a technical scheme, wherein the piston rod is fixedly provided with the supporting frame through the installing nut and the installing gasket, the piston sheet is arranged on the supporting frame, an open-type annular groove is arranged on the outer wall of the piston shell along the circumferential direction, lubricating grease is filled in the annular groove, the groove opening of the annular groove faces away from the axle line of the piston rod; the piston sheet positioned in the annular groove is integrally provided with a plurality of annular convex edges which are arranged along the circumferential direction of the piston sheet; and a protecting film layer is adhered on the piston sheet in the annular groove. The invention has the advantages of low friction coefficient, long service life, better tightness and the like.

Description

technical field [0001] The invention relates to a piston, in particular to a low friction coefficient piston. Background technique [0002] The piston is a special pneumatic part of the balancer used in the press. It can work normally in harsh working conditions such as no oil supply, high speed and high temperature for a long time, and the theoretical service life exceeds 5000KM. In the past, the piston was generally made of cast iron, and the piston ring and sealing ring were installed in the groove on the piston. The friction coefficient between the piston ring and the cylinder liner was relatively large. Under the condition of high speed and no lubrication, a high temperature rise would occur. Significantly shorten the service life of the sealing ring, causing the balancer to leak and fail. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a piston with low friction coefficient, long se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J1/02F16J1/08F16J9/00
Inventor 庄敏贺和群
Owner WUXI TUOFA AUTOMATIC CONTROL EQUIP