Engine valve oil seal test stand

Abstract

The invention discloses an engine valve oil seal test stand comprising a stand frame (1), a motor (2), a vacuum pump (3), an oil tank (4), a hydraulic pump (5), a cylinder cover supporting vertical plate (6) and a cylinder cover supporting bottom plate (7). The motor (2), the vacuum pump (3), the oil tank (4) and the hydraulic pump (5) are fixedly arranged on the stand frame (1). The table surface of the stand frame (1) is provided with a sliding groove. The engine valve oil seal test stand can correctly measure the leak tightness of valve oil seals of engines with different models and the amount of engine oil entering an engine cylinder body from valve oil seal lips and ensure the leak tightness of the valve oil seal of an engine cylinder cover which leaves a factory to conform to relative requirements.

Description

technical field [0001] The invention relates to the technical field of engine detection devices, in particular to an engine valve oil seal test bench. Background technique [0002] The valve oil seal is one of the important components of the engine gas distribution system. With the improvement of people's living standards and the emphasis on environmental protection, high requirements have been put forward for the power-up rate, emission and vibration of the engine. The advanced nature of the engine gas distribution system is particularly important. When the valve oil seal is subjected to high temperature and the valve stem reciprocates on the lip, it must ensure: [0003] 1. Do not allow too much lubricating oil to enter the cylinder through the lip of the valve oil seal, otherwise the engine emission will exceed the standard, and carbon deposits on the valve stem will cause serious consequences such as affecting the life of the engine; [0004] 2. The lubricating oil ent...

AI Technical Summary

Problems solved by technology

[0003] 1. Do not allow too much lubricating oil to enter the cylinder through the lip of the valve oil seal, otherwise the engine emission will exceed the standard, and carbon deposits on the valve stem will cause serious consequences such as affecting the life of the engine;

[0004] 2. The lubricating oil entering the cylinder through the lip of the valve oil seal should not be too little. It must be ensured that there is enough lubrication for the valve stem under high temperature, high-speed sliding, negative pressure and many other conditions, otherwise it will cause the valve to turn blue and affect the valve and the valve. The friction between the pipes will cause the valve and valve pipe to be strained in severe cases;

[0005] Therefore, it is particularly important to test the sealing performance of the valve oil seal and the amount of oil leakage from the lip of the valve oil seal. At present, most engines do not test the sealing performance of the valve oil seal or use special equipment for testing. Once the engine does not meet the sealing requirements of the valve oil seal The above problems often arise

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