Test leakage machine plugging assembly

Abstract

The invention relates to a test leakage machine plugging assembly. The test leakage machine plugging assembly includes a movable bushing, a sealing ring, a movable bushing sleeve rod and a fixing rod; the movable bushing sleeve rod comprises a sleeve rod segment; two ends of the sleeve rod segment are a screw rod segment and a wrench segment; the diameter of the sleeve rod segment is greater than the diameter of the screw rod segment and is smaller than the diameter of the wrench segment; one end of the fixing rod is a fixing rod mounting portion, and the other end of the fixing rod is a movable bushing connection portion; the diameter of the fixing rod mounting portion is smaller than the diameter of the movable bushing connection portion; a movable bushing connection counter bore is formed at the movable bushing connection portion; a screw rod segment connection screw hole is formed at the bottom of the movable bushing connection counter bore; the movable bushing is a stepped bushing; the movable bushing movably sleeves the sleeve rod segment; the small end of the movable bushing is inserted into the movable bushing connection counter bore; an gap is left between the free end surface of the small end of the movable bushing and the bottom of the movable bushing connection counter bore; the sealing ring sleeves the small end of the movable bushing; the diameter of the large end of the movable bushing is equal to the diameter of the movable bushing connection portion and is larger than the diameter of the wrench segment.

Description

technical field [0001] The invention relates to a plugging assembly, in particular to an assembly used for blocking some oil passages and water passages of an engine cylinder block and a cylinder head during an engine leak test. Background technique [0002] In the manufacturing process of the engine, the airtightness of the cylinder block and cylinder head directly determines the qualified rate of the product, and even affects the performance of the engine. Therefore, a leak test process is arranged in the machining and assembly process of the engine, which is also It is to test the leakage of the oil passages and water passages on some parts of the engine. The leakage amount must be within a certain qualified range to avoid the phenomenon of oil-water mixing or oil leakage in the engine. At present, engine components are mostly measured by differential pressure method, which is based on the principle that the leakage of the measured object causes a pressure drop, thereby f...

AI Technical Summary

Problems solved by technology

And these stepped holes often have defects such as air holes in the position of the sealing ring, so that it is likely to cause poor sealing when assembling in the hole, resulting in leakage in actual use

However, the method of end face sealing for leak testing cannot detect whether there are defects such as air holes in these stepped holes at the position of the sealing ring, which will affect the correctness of the leak testing results, that is, it will make the actual incorrect Qualified products are misjudged as qualified products

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