Double-lip sealing ring for rotary shaft of air conditioner compressor

Abstract

The invention discloses a double-lip sealing ring for a rotary shaft of an air conditioner compressor. The double-lip sealing ring consists of a first sealing seat ring, a limit taper sleeve, a second sealing ring, a bearing tray and a bearing gasket; the limit taper sleeve, the second sealing ring, the bearing tray and the bearing gasket are arranged in the cavity of the first sealing seat ring in turn; and the sectional shape of a bearing lug boss ring is right-angled trapezoid, the right-angled waist is inside, and the oblique waist is outside. The sectional shape of the bearing lug boss ring is changed into the right-angled trapezoid from rectangle; and after the bearing lug boss ring is pressed, the radial component force of the pressure acted on the bearing lug boss ring is outward and has minimum influence on the limit taper sleeve, thus ensuring the shapes of sealing lips and the stability of tension, ensuring the sealing performance, eliminating the single offset phenomenon produced after a sealing lip belt is pressed and deformed, reducing the friction force between the sealing lip belt and the rotary shaft, prolonging the service life of the whole product and reducing the energy consumption.

Description

Technical field: [0001] The invention relates to a sealing part for an air-conditioning compressor, in particular to a double-lip sealing ring for the rotating main shaft of the air-conditioning compressor. Background technique: [0002] The skeleton sealing ring used in the rotating shaft of the air-conditioning compressor has high requirements. It must be able to isolate the refrigerant and refrigerating oil in the air-conditioning compressor from the transmission parts to prevent leakage of the refrigerant and refrigerating oil. At present, the rotating shaft of the air-conditioning compressor The skeleton sealing ring used is double-lip sealing structure, as attached figure 1 As shown, it consists of the first sealing seat ring 1, the limit cone sleeve 2, the second seal ring 3, the pressure tray 4 and the pressure washer 5, the limit cone sleeve 2, the second seal ring 3, the pressure tray 4 and the pressure washer 5 are sequentially installed in the inner cavity of th...

AI Technical Summary

Problems solved by technology

[0003] In the actual production process, the exposed extension section of the metal skeleton 11 is bent by a bending and hemming machine to press the pressure washer 5, so that the first sealing seat ring 1, the limit taper sleeve 2, the second sealing ring 3, the bearing The pressure tray 4 and the pressure washer 5 are riveted into one body. During the rolling riveting process, the pressure-bearing boss ring 14 and the pressure-bearing angle ring 15 in the first sealing seat ring 1 will be subjected to relatively large pressure, and the pressure The action direction is highly variable, and it is easy to cause irregular compression and displacement of the pressure-bearing boss ring 14, which will cause local inward and local outward compression and displacement, so that the sealing lip of the second sealing ring 3 will appear The sealing fault causes the tension and shape of the sealing lip to be unstable, which directly affects the inclusion uniformity between the sealing lip of the first sealing lip band 13 and the second sealing ring 3 and the rotating shaft, which not only affects the sealing performance, but also affects the service life

This is the main reason for the unstable sealing performance and short service life of the double-lip seal ring for the rotary shaft of the air-conditioning compressor.

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