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Rod body sealing structure

A technology of sealing structure and rod body, which is applied in the direction of fluid pressure actuating device, etc., can solve problems such as hydraulic cylinder shaking and crawling, customer economic loss, guide sleeve sealing failure, etc., and achieves simple sealing configuration structure, wide application conditions and sealing effect Good results

Inactive Publication Date: 2014-05-07
李一凡
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All kinds of construction machinery are inseparable from hydraulic cylinders. The performance of hydraulic cylinders directly affects the performance of the whole machine. Due to the frequent work and large impact of hydraulic cylinders during work, it is easy to generate seal back pressure. Over time, the seal of the guide sleeve will fail. The cylinder shakes and crawls, or even leaks internally, causing the whole machine to fail to work, bringing inconvenience to the construction work and causing economic losses to customers

Method used

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  • Rod body sealing structure

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0010] like figure 1 As shown, the hydraulic cylinder piston rod sealing structure of the present invention is to install a sealing device between the guide sleeve and the piston rod, that is, on the outer cylindrical surface of the piston rod. The sealing device is composed of the main LBH support ring, the F4 bronze support ring and the shaft. Composed of Y ring + retaining ring, step seal, oil-free bearing, and F4 bronze support ring. When the Y-ring is installed, the end face of the lip should face the side with high hydraulic pressure. When the pressure changes greatly and the sliding speed is high, the support ring should be used to fix the sealing ring. In the dynamic seal, when the pressure is greater than 20MPa, the Y-ring will be squeezed into the gap and damaged, so it is necessary to set a back-up ring made of PTFE or nylon on the low-pressure side of t...

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PUM

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Abstract

The invention provides a rod body sealing structure, and particularly relates to a piston rod sealing structure for a hydraulic cylinder. The rod body sealing structure is mainly used for the sealing between a guide sleeve and a piston rod. The rod body sealing structure comprises the guide sleeve, the piston rod and a sealing groove, wherein the guide sleeve in slide fit with the piston rod is mounted on a cylinder barrel, and sealing is formed by a sealing element on the guide sleeve and the piston rod. A sealing device is composed of a scraper seal, a supporting ring, a shaft Y ring, a sterfin ring, an oilless bearing and a supporting ring, starting force is small, guide length is increased, large eccentric loads can be borne, and the pressure maintaining effect is good. The rod body sealing structure is simple, low in cost, good in sealing effect, capable of bearing the large loads and wide in application working conditions.

Description

technical field [0001] The invention designs a rod body sealing structure, in particular to a piston rod sealing structure for a hydraulic cylinder, which is mainly used for sealing between a guide sleeve and a piston rod. Background technique [0002] The implementation of the "Twelfth Five-Year" development plan of the country, various industries and regions; the accelerated cultivation of strategic emerging industries; the upgrading of consumption structure and industrial structure; the continuous deepening of various reforms, including the continuous improvement of non-public economic development policies and institutional environment And so on, will further stimulate the vitality of the market. But the requirements for cranes are getting higher and higher. The positioning accuracy of cranes is an important requirement for cranes. Most of them are guaranteed by rotary code discs, gear chains, laser heads and steel plate holes. The positioning accuracy is usually ±3mm, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/14F15B15/20
Inventor 李一凡
Owner 李一凡
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