Valve rod sealing member with buffer function

A technology of valve stems and seals, which is applied in the direction of engine components, lift valves, machines/engines, etc., can solve problems such as sinking, short service life of valve stems and valve seats, wear of valve stems and valve seats, and achieve The effect of reducing speed, good sealing and prolonging service life

Inactive Publication Date: 2017-07-28
SICHUAN SENJIE GAS EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a valve stem seal with a buffer function, which solves the serious wear between the existing valve stem

Method used

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  • Valve rod sealing member with buffer function

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, the present invention has a valve stem seal with a buffer function, including a valve stem 1 and a valve seat 2, the end of which the valve stem 1 contacts with the valve seat 2 is a valve cover 3, and the valve seat 2 is A rectangular groove, the contact end of the valve cover 3 and the bottom of the valve seat 2 is a smooth curved surface, and an arc groove 4 is also formed on the side of the valve cover 3 facing the valve seat 2, the arc The centerline of the arc-shaped groove 4 is on the same straight line as the centerline of the valve stem 1, and the angle of the central angle corresponding to the arc surface of the arc-shaped groove 4 is α, and α is 85°. The above structure solves the existing problems of severe wear between the valve stem 1 and the valve seat 2, which causes the valve to sink due to poor sealing, and the short service life of the valve stem 1 and the valve seat 2.

Embodiment 2

[0019] Such as figure 1 As shown, in the valve stem seal with cushioning function of the present invention, on the basis of Example 1, the bandwidth of the surface of the valve cover 3 in contact with the inner wall of the valve seat 2 is 3.5 mm.

Embodiment 3

[0021] Such as figure 1 As shown, the present invention has a valve stem seal with a buffer function. On the basis of Embodiment 1, the valve cover 3 is made of titanium alloy.

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PUM

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Abstract

The invention discloses a valve stem seal with a buffer function, which comprises a valve stem and a valve seat. The end of the valve stem in contact with the valve seat is a valve cover, and the valve seat is a rectangular groove. The contact end between the cover and the bottom of the valve seat is a smooth curved surface, and there is an arc-shaped groove on the side of the valve cover facing the valve seat, the center line of the arc-shaped groove and the center line of the valve stem Located on the same straight line, and the angle of the central angle corresponding to the arc surface of the arc groove is α, 75°≤α≤105°. The invention solves the problems of severe wear between the existing valve stem and the valve seat, which causes the valve to sink due to poor sealing, and the problems that the service life of the valve stem and the valve seat is short.

Description

technical field [0001] The invention relates to the field of automobile engine valve trains, in particular to a valve rod seal with a buffer function. Background technique [0002] The valve stem seal is a key part of the engine door train, which is of great significance to keep the exhaust gas level of the engine low and the valve guide rod to maintain sufficient lubrication. The valve stem and valve seat are one of the friction pairs in the engine with very harsh working conditions. They bear extremely high mechanical loads, thermal loads, and are also eroded by corrosive gases during work, so the lubrication state is extremely poor. Serious wear of the pair of friction pairs during work will cause the valve to sink, the harmful volume of the combustion chamber will increase, and the performance of the engine will deteriorate. In severe cases, the sealing effect with the valve seat will fail, affecting the power, economy and reliability of the engine. . Contents of the ...

Claims

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Application Information

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IPC IPC(8): F01L3/08
CPCF01L3/08
Inventor 何松龙
Owner SICHUAN SENJIE GAS EQUIP CO LTD
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