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Low-friction air valve oil seal

A valve oil seal and low-friction technology, which is applied in the direction of lift valves, engine components, machines/engines, etc., can solve problems such as carbon deposits and large oil leakage, reduce content, ensure normal operation, and accurately control oil leakage Effect

Inactive Publication Date: 2015-02-18
YANTAI RUNFUXIANG OIL SEAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the pressure of the gas on the gas side of the valve oil seal will be greater than the atmospheric pressure, and the gas at the intake valve will impact the main lip of the valve oil seal through the gap between the valve guide rod and the guide tube, and the main lip will be opened instantly, resulting in excessive oil leakage. Possibility of carbon deposits
In addition, the temperature of the exhaust valve is usually higher than that of the intake valve, and the pressure of the gas is relatively higher than that of the intake valve. At the moment of exhaust, the gas in the combustion chamber impacts the main lip of the valve oil seal through the gap between the valve guide rod and the guide tube. The main lip is opened instantly, resulting in excessive oil leakage and the possibility of carbon deposits

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1, a kind of low-friction valve oil seal, such as figure 1 , the elastic sealing body 1 wraps the support frame 2, the elastic sealing body 1 is provided with a sealing lip, the sealing lip is the main sealing lip 4 and the air lip 9, the outer side of the main sealing lip 4 is provided with a spring 3, and the annular sealing surface formed by the main sealing lip 4 A strip-shaped axial main lip annular band 5 is provided on the main lip annular band 5, and an annular rib or groove 6 is arranged on the main lip annular band 5. The height of the rib or the depth of the groove is 0.02--0.20 mm. This embodiment adopts A groove 6 with a semicircular cross section and a depth of 0.2 mm constitutes a structure of the present invention.

Embodiment 2

[0034] Embodiment 2, a kind of low-friction valve oil seal, such as figure 2 , is on the basis of Example 1. Compared with Example 1, only a strip-shaped axial air lip annular band 8 is provided on the annular sealing surface formed by the air lip 9, and an annular air lip annular band 8 is provided with an annular Ribs or grooves 6, the main sealing lip 4 is not provided with an axial main lip annular zone 5, this embodiment adopts ribs 6 with a trapezoidal cross section, the height of ribs 6 is 0.1 mm, and the rest of the structure is the same as that of embodiment 1.

example 3

[0035] Example 3, a low-friction valve oil seal, such as image 3 As shown, on the basis of Example 1, on the annular sealing surface formed by the main sealing lip 4 and the air lip 9, strip-shaped axial main lip annular bands 5 and air lip annular bands 8 are respectively provided, and the main lip annular band 5 Annular ribs or grooves 6 are arranged on the annular belt 8 of the air lip. This embodiment adopts ribs 6 with a triangular cross-section. The height of ribs 6 is 0.02 mm.

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Abstract

The invention discloses a low-friction air valve oil seal. The low-friction air valve oil seal comprises a supporting framework and an elastic sealing body, wherein the elastic sealing body is provided with at least one sealing lip; an annular convex rib or a groove is formed in an annular sealing surface formed by the sealing lip. The low-friction air valve oil seal has strong sealing capability, constant engine oil leaking amount, energy conservation and emission reduction and reasonability in lubrication; the sliding between an air valve rod and a guide pipe is guaranteed, the friction between the air valve oil seal and an air valve is reduced, the service life of the oil seal is prolonged and the power loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of engine oil seals, in particular to a low-friction valve oil seal. technical background [0002] At present, the development trend of the current engine puts forward higher requirements for environmental protection, and the emission is converted from National III to National IV, and then converted to National V, National VI, and even higher requirements. In order to respond to and adapt to this development trend, in addition to changing the engine from fuel oil to gas or making other improvements in fuel, the current important improvement of engine manufacturers is to adopt turbocharging technology to meet emission requirements. This also puts forward higher requirements for our valve oil seal, that is, to precisely control the leakage of the valve oil seal to ensure the lubrication between the valve guide rod and the guide tube without excessive residual oil dripping into the combustion chamber to cause c...

Claims

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Application Information

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IPC IPC(8): F01L3/08
CPCF01L3/08
Inventor 杜杰王仁波
Owner YANTAI RUNFUXIANG OIL SEAL
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