Piston ring for car air conditioning compressor

Abstract

The invention relates to a piston ring for a car air conditioning compressor. The piston ring for the car air conditioning compressor comprises a C-shaped ring body with an opening, wherein the ring body is provided with V-shaped grooves which are continuous along the external circular surface of the ring body. On one hand, the sealing property of the piston ring is improved, and on the other hand, the oil storage performance is improved; good lubrication is guaranteed in the absence of lubrication, the purpose of resisting cylinder scoring can be achieved, the wear of the ring and the cylinder is reduced, and the service life of the ring and the cylinder is prolonged.

Description

technical field [0001] The invention relates to the technical field of air-conditioning refrigeration compressors, in particular to a piston ring for car air-conditioning compressors. Background technique [0002] At present, there are two types of piston rings for piston car air-conditioning compressors. The first type is cast iron piston rings used in conjunction with the piston, and the second type is coated with a layer of polytetrafluoroethylene composite material (or coated with Teflon coating). The second type omits the piston ring. The advantages of PTFE composite materials are corrosion resistance, wear resistance and strong self-lubrication. However, with the wear of PTFE on the outer cylindrical surface of the piston (or coated with Teflon coating) , the gap between the piston and the ring cylinder increases, and the leakage is relatively large and the sealing performance is poor. On the other hand, a layer of polytetrafluoroethylene composite material (or Te...

AI Technical Summary

Problems solved by technology

The second type omits the piston ring. The advantages of PTFE composite materials are corrosion resistance, wear resistance and strong self-lubrication. However, with the wear of PTFE on the outer cylindrical surface of the piston (or coated with Teflon coating) , the gap between the piston and the ring cylinder increases, and the leakage is relatively large and the sealing performance is poor. On the other hand, a layer of polytetrafluoroethylene composite material (or Teflon coating) is coated on the outer cylindrical surface of the piston. A large amount of toxic gas will be produced in the process, which will cause problems such as complicated workmanship and high manufacturing cost.

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