An oil-free compressor with a tolerance-type rotation limiting mechanism

Abstract

The invention belongs to the technical field of compressors and particularly relates to an oilless compressor with a capacity difference type rotation limiting mechanism. The oilless compressor comprises a piston, a connecting rod, an axle box, a driving shaft and a swinging disk and is characterized in that the capacity difference type rotation limiting mechanism for controlling a rotation angle range of the swinging disk around the driving shaft axis. The rotation limiting mechanism comprises a swinging arm, one end of the swinging arm is directly matched with the swinging disk through a ball hinged structure or indirectly matched with the swinging disk through a swinging disk pin, and the other end of the swinging arm is directly matched with the axle box through the ball hinged structure or matched with the axle box indirectly through an axle box pin. Due to the fact that two ends of the swinging arm are matched with the swinging disk and the axle box respectively through the ball hinged structures, a universal connection matching mode is formed, and therefore the compressor can well adapt to or allow various errors and deformation, namely the compressor is not sensitive to the errors and deformation. In other words, even if under the conditions of large manufacturing errors, assembling errors and stress deformation and temperature difference deformation, the compressor and the rotation limiting mechanism of the compressor can operate reliably.

Description

technical field [0001] The invention belongs to the technical field of compressors, and relates to an oil-free compressor, in particular to a swash plate type oil-free compressor with a rotation limiting mechanism. Background technique [0002] Chinese patent applications CN103291588A and CN103291581A disclose a number of swash plate compressors that can realize oil-free output of high-pressure working fluid, including inclined shaft compressors and swash plate compressors. The compressors provided by the above patents include pistons, connecting rods, Drive shaft and wobble plate; for slant shaft compressors, it also includes a slant shaft arranged obliquely to the axis of the drive shaft. It is rotatably set on the inclined shaft and driven by the inclined shaft; for the swash plate type compressor, it includes a drive plate, which is tightly connected with the drive shaft or made in an integral structure with the drive shaft, and the drive plate is provided with A drivin...

AI Technical Summary

Problems solved by technology

[0003] However, the oblique-shaft compressors or swash-plate compressors disclosed in the above-mentioned patent applications and the limited-rotation mechanisms they adopt still have a place worthy of further improvement, mainly in that they are very sensitive to various errors and deformations, so as to As for the need to improve manufacturing precision, assembly precision, strengthen rigidity, and select good materials and processing techniques to ensure the reliability of the compressor, the result is an increase in the production cost of the compressor

In fact, the above-mentioned compressor and the limited-rotation mechanism adopted by it require very precise position and attitude of each kinematic pair. The large deviation between the fixed point of the disc pin axis or the shaft box pin axis and the working plane of the wobble plate, etc., will greatly increase the possibility of collision or even interference of the main kinematic pairs of the compressor, especially the kinematic pairs of the limited-rotation mechanism , resulting in large mechanical noise and reducing the ability of parts to resist fatigue damage, so that the compressor cannot work normally

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