Reciprocating oil seal structure of compressor

Abstract

The invention belongs to the technological field of compressors, relating to a reciprocating oil seal structure of a straight reciprocating compressor, which comprises an oil seal main part, a seal lip, an end plate and a connecting rod, wherein the connecting rod passes through the oil seal main part and the seal lip; the seal lip is hermetically matched with the external surface of the rod body of the connecting rod; an abducent seal fin is adopted; the seal fin is fixedly and hermetically connected with the oil seal main part or is integrated with the oil seal main part; the external ring margin of the seal fin is fixedly and hermetically connected with the end plate; the elasticity of the seal fin is utilized as a compensation to ensure that the oil seal main part can trace the shake of the connecting rod in time; the transformation range of the seal lip is reduced relative to the rod body of the connecting rod, and the degree the lip of the seal lip fits the connecting rod is further increased. The invention can ensure that the oil seal keeps good sealability when the oil seal structure is in shacking condition.

Description

technical field [0001] The invention belongs to the technical field of compressors, in particular relates to an oil seal structure of a compressor, more specifically relates to a reciprocating oil seal structure of a linear reciprocating compressor. Background technique [0002] The piston and connecting rod of the linear reciprocating compressor adopt reciprocating linear motion. For the oil-lubricated linear reciprocating compressor, in order to prevent the lubricating oil in the crankcase from escaping into the working chamber of the piston, it is necessary to use an oil seal structure for its connection. The oil seal currently in use includes an oil seal main body, a sealing lip and an elastic ring, wherein the oil seal main body is fastened on an end plate, and the end plate is fastened on the crankcase of the compressor or the end plate and the crankcase The integral structure, the reciprocating connecting rod passes through the inner hole of the main body of the oil s...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned oil seal has a disadvantage, that is, the main body of the oil seal is fastened by the end plate. When the connecting rod vibrates, the axis of the inner hole of the main body of the oil seal and the axis of the connecting rod will not coincide. At this time, the connecting rod biases the oil seal. As a result, the bonding force of the oil seal to the connecting rod shaft is unbalanced. In other words, the sealing lip will undergo elliptical deformation under the action of the connecting rod. Once the elliptical deformation is too large, the sealing lip will not be able to get close to the connecting rod shaft or even be empty ( Especially at one end of the major axis of the deformed ellipse and its vicinity), it is easy to cause the oil seal to fail at this time; in addition, the relative movement between the sealing lip of the oil seal and the connecting rod is also unfavorable to the seal between them

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