Method and device for checking oil channel sealing of engine cylinder

Abstract

The invention relates to an inspection method and corresponding inspection device for the oil channel sealing of an engine cylinder, belonging to the engine inspection technical field, which comprises an expanding core sealing shaft and a connecting nozzle, wherein, a mandrel with an inner hole is arranged within the expanding core shaft, a group of elastic expanding rings are arranged on periphery of the mandrel, and both ends of the expanding rings are pressed tightly via a spacer sleeve and a retainer ring; the inspection method is as follow: firstly, inserting the prefabricated expanding core shaft of the device into the spindle hole of cylinder and the camshaft hole separately; then pouring the high pressure oil or water or air into the inner hole of the expanding core shaft to make the expanding rings expand outwards to seal the oil hole and other outlets of the oil channel; and finally pouring the high pressure oil or water or air into the inner cavity of the oil channel to inspect the leakage phenomenon of the oil channel and determine the sealing performance. The invention has the advantages of convenient operation, reliable inspection, and ability of improving obviously inspection efficiency and effect and guaranteeing the product performance.

Description

technical field [0001] The invention relates to a testing method for the sealing performance of an engine cylinder block oil passage, and also relates to a testing device used in the method. Background technique [0002] The tightness inspection of the water channel and oil channel in the engine cylinder cavity is usually to block the external outlet of the water channel and oil channel, and then pass high-pressure water, oil or gas into the inner cavity to check its leakage. Since there are few outlets of the water channel and they are all on the periphery of the cylinder body, they are easy to be blocked, so the water channel sealing inspection is easy to realize. There are many lubricating points outside the oil channel, and the oil holes are all in the main shaft hole and the inner wall of the camshaft hole in the cylinder block, so it is particularly difficult to block. Many engine manufacturers do not inspect the oil passages of the cylinder block. Only the oil leakag...

AI Technical Summary

Problems solved by technology

There are many lubricating points outside the oil passage, and the oil holes are all in the main shaft hole and the inner wall of the camshaft hole inside the cylinder block, so it is particularly difficult to seal

Many engine manufacturers do not inspect the oil passages of the cylinder block. Oil leakage can only be found when the engine bench is inspected. The failure of the oil passage can only be dismantled and scrapped because it cannot be repaired, and the loss is relatively large.

Some manufacturers use rubber rods to check the oil passage seal of the engine cylinder block respectively into the main shaft hole and the camshaft hole to seal the oil hole on the hole wall.

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