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Packing and sealing system

A technology of seals and components, which is applied in the direction of engine seals, engine components, fluid pressure actuation devices, etc., can solve the problems of increased heat generation and sliding resistance, decreased service life of piston rod sealing systems, and deteriorated working performance, etc. Avoid the effect of the function

Inactive Publication Date: 2009-10-07
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] If the oil pressure accumulates in the space S as described above, the oil pressure will continue to act on the rod seal R, resulting in increased wear, heat generation and sliding resistance, leading to a decrease in the service life and deterioration of the performance of the rod seal system.

Method used

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  • Packing and sealing system
  • Packing and sealing system
  • Packing and sealing system

Examples

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no. 1 example

[0076] see Figure 1-3 , the schematic structure of the sealing member according to the first embodiment of the present invention will be described below. figure 1 is a schematic structural diagram of the seal according to this embodiment. figure 1 A shows the seal viewed from the axial direction, figure 1 B is along figure 1 A sectional view taken along line A-A in A, figure 1 C is from figure 1 The seal seen from arrow B in A. figure 2 is a perspective view of the structure of the seal according to the present embodiment, figure 2 A shows the seal from the seal side with a section of the seal removed to show the cross section. figure 2 B is the seal seen from the side opposite the seal side. image 3 It is a half-sectional view of a sealing system suitable for sealing according to this embodiment.

[0077]

[0078] Such as figure 1 and 2 As shown, the sealing member 1 is an annular member, including: a base 10; an inner peripheral lip 11 (second lip) pr...

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Abstract

The invention provides a packing and a sealing system capable of enhancing an accumulation avoiding function. A packing (1) fitted to an annular groove provided in one member out of a housing having a shaft hole and shaft to be inserted into the shaft hole to seal the annular gap between the two members, which comprise a base (10) and a lip portion (12) projecting from the groove bottom side of the annular groove in the base (10) toward a sealed object side, and which is constituted such that, when the peripheral surfaces on the groove bottom side of the annular grooves in the base (10) and the lip portion (12) tightly contact the groove bottoms of the annular grooves and a pressure on a non-sealed object side goes higher than a pressure on a sealed object side, the base (10) and the lip portion (12) deform to allow the sealed object side to communicate with the non-sealed object side at contact portions with the groove bottoms of the annular grooves and thereby reduce a pressure on the non-sealed object side, wherein the base (10) is provided with a pressure guide path for allowing a contact portion between the lip portion (12) and the groove bottom of the annular groove to communicate with the non-sealed object side.

Description

field of invention [0001] The present invention relates to a packing used in hydraulic cylinders and the like and a sealing system equipped with the packing. Background of the invention [0002] The sealing system of the hydraulic cylinder usually uses a rod sealing system (rod sealing system) and the like. The piston rod seal system is used in hydraulic cylinders and the like which are used as actuators for construction machines or transport vehicles and the like. Combine below Figure 6 Illustrates common hydraulic cylinders using existing piston rod sealing systems. Figure 6 It is a perspective view showing a schematic cross section of a hydraulic cylinder. [0003] The hydraulic cylinder 101 includes: a cylinder 102 ; a piston 103 inserted into the cylinder 102 to slide freely; and a rod 104 connected to the piston 103 . Furthermore, the hydraulic cylinder 101 is provided with a piston rod sealing system fitted in a mounting groove in one end of the cylinder 102 so as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/32F15B15/14F16J15/3232F16J15/3236
CPCF16J15/322F16J15/164F15B15/1461F15B15/14F16J15/32
Inventor 伹野光加藤久志
Owner NOK CORP