Scroll compressor with supporting radial unloading structure

Abstract

The invention discloses a scroll compressor with a supporting radial unloading structure, and relates to the technical field of scroll compressors, in particular to a scroll compressor adopting a self-lubricating bearing. An unloading groove with a certain depth is machined in the position, close to the self-lubricating bearing, of the upper end face of an upper support through one of turning machining and milling machining; and the unloading groove is of an annular structure. The unloading groove can also be arranged on the position, close to the self-lubricating bearing, of the upper end face of a lower support. The section shape of the unloading groove can be one of a straight groove and an inclined groove, and the unloading groove can be designed and selected according to the actual load condition of the compressor and the bearing capacity of the self-lubricating bearing. The unloading groove is of one of a continuous annular structure and a discontinuous annular structure. According to the technical scheme, the problems that in the prior art, the self-lubricating bearing is selected, the structure and size of the upper support are changed, the outer diameter and length of a compressor shell are increased, and the design difficulty is increased are solved.

Description

technical field [0001] The invention has a scroll compressor with a supporting radial unloading structure, and relates to the technical field of scroll compressors, in particular to a scroll compressor using a self-lubricating bearing. Background technique [0002] The upper support of the existing scroll compressor is generally fixed on the upper part of the casing, which is used to support the Oldham ring and the movable scroll while fixing the fixed scroll, and restrain the radial movement of the crankshaft. In order to prevent the rotation of the crankshaft from causing In the case of overheating and ablation, a self-lubricating bearing will be added between the crankshaft and the upper support, and the service life of the self-lubricating bearing itself also greatly limits the service life of the compressor. [0003] In order to use self-lubricating bearings to adapt to higher crankshaft rotation speeds and greater crankshaft loads, self-lubricating bearings with a resi...

AI Technical Summary

Problems solved by technology

[0002] The upper support of the existing scroll compressor is generally fixed on the upper part of the casing, which is used to support the Oldham ring and the movable scroll while fixing the fixed scroll, and restrain the radial movement of the crankshaft. In order to prevent the rotation of the crankshaft from causing In the case of overheating and ablation, a self-lubricating bearing will be added between the crankshaft and the upper support, and the service life of the self-lubricating bearing itself will greatly limit the service life of the compressor.

[0003] In order to use self-lubricating bearings to adapt to higher crankshaft rotation speeds and greater crankshaft loads, self-lubricating bearings with a resin layer structure can be used. The advantage of using this style of bearings is that the bearings can adapt to higher crankshaft rotation speeds, but for In the case of high-load operation, the uneven force of the self-lubricating bearing is more obvious, and local stress concentration will occur, so the self-lubricating bearing still has ablation phenomenon, which shortens the service life of the compressor and limits the compressor. Load capacity is the operating range of the compressor

[0004] The disadvantage of the existing technology is: in order to adapt to higher radial load and crankshaft speed, the selection of existing self-lubricating bearings generally uses self-lubricating bearings with larger inner diameters and longer lengths

This method changes the structure and size of the upper support to a certain extent, and even causes insufficient internal space of the compressor, which requires increasing the outer diameter and length of the compressor shell, which greatly increases the difficulty of design

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