Supercharger oil seal structure

Abstract

The invention relates to the technical field of superchargers, in particular to a supercharger oil seal structure, including a shaft seal body, a shaft seal sleeve and a seal ring, the shaft seal body is fixed on the turbine rotating shaft, and the circumferential surface of the shaft seal body A seal ring groove, a first circular ring protrusion, and a second circular ring protrusion are provided in sequence, the seal ring is mounted on the seal ring groove, the shaft seal sleeve is mated and connected to the shaft seal body, and the first inner peripheral surface of the shaft seal sleeve Pressed on the sealing ring, the second inner peripheral surface of the shaft seal sleeve is placed outside the protrusion of the first ring. The invention has the advantages of simple structure, reliable performance and low manufacturing cost. It can effectively shake off the lubricating oil from the rotating parts and make it flow back into the oil chamber smoothly. ability to meet customer needs.

Description

technical field [0001] The invention relates to the technical field of superchargers, in particular to a supercharger oil seal structure. Background technique [0002] In turbocharger applications, the power is transmitted from the vortex end to the compressor end by the high-speed rotating shaft, and the intermediate casing is used to connect the volute end and the compressor end housing, while supporting the high-speed rotating shaft. When the supercharger is working, sufficient oil lubrication and cooling is required between the middle shell and the shaft; the shaft seal sleeve, the shaft seal body and the seal ring form the oil seal structure at the compressor end, which makes the lubrication through the mechanical seal and the oil throwing function After the oil has functioned, it can return to the middle casing oil cavity, preventing a large amount of lubricating oil from leaking to the compressor end. Since the seal ring between the shaft seal sleeve and the shaft se...

AI Technical Summary

Problems solved by technology

However, when the rotating shaft rotates at high speed, because the oil throwing cylindrical surface on the shaft seal body is very short, only part of the lubricating oil can be thrown out to reach the cavity of the shaft seal sleeve, and a large amount of lubricating oil is accumulated on the shaft seal body. Once the liquid level is higher than the shoulder height of the shaft seal body, it will diffuse into the gap between the shaft seal body and the shaft seal sleeve, and then leak to the compressor end

The small-sized oil throwing groove added on the shaft seal body can only take away a small part of the oil passing through the gap between the shaft seal sleeve and the shaft seal body, so a large amount of lubricating oil still leaks to the compressor end

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