Scroll type fluid equipment

Abstract

The present invention provides scroll type fluid equipment which adopts a thrust plate installing structure, wherein, the thrust plate installing structure can reliably fix a thrust plate by absorbing a manufacturing tolerance and reduce the contact surface pressure of a fitting part of pins and the thrust plate. Four pieces of pins (31) are protruded from a thrust bearing part (1) of a front cover (6), four gap parts (41a-41d) are formed on the thrust plate (40) for fitting with the pins (31), the shapes of the four gap parts (41a-41d) are that the four gap parts extend along a radius direction of the thrust plate, and the shapes of the three gap parts (41a-41c) of the four gap parts are that the fitting gap of the gap parts and the pins (31) is minimal on the periphery of the thrust plate.

Description

technical field [0001] The present invention relates to a scroll type fluid device, which comprises a fixed scroll and a movable scroll, and compresses or expands fluid by changing the volume of a closed space formed by the fixed scroll and the movable scroll . Background technique [0002] As a scroll-type fluid device, a scroll-type compressor disclosed in Patent Document 1, for example, is widely known. The above-mentioned scroll compressor includes a scroll unit in which the movable scroll after rotation is prevented from revolving while being in contact with the fixed scroll by the rotation preventing mechanism, and the fixed scroll and the movable scroll A closed space whose volume changes with the above-mentioned revolution is formed between the disks. In addition, in the above-mentioned compressor, in order to ensure the relative sliding between the movable scroll and the casing wall, the thrust plate is sandwiched between the thrust plates that receive the thrust f...

AI Technical Summary

Problems solved by technology

[0007] However, in the installation structure of the thrust plate described in Patent Document 1, although the movement of the thrust plate can be restricted in the radial direction of the thrust plate, it cannot be restricted in the circumferential direction of the thrust plate, so there is a problem with the movable scroll. The thrust plate moves in the circumferential direction by a distance equivalent to the clearance between the pin and the long hole due to the revolution motion

Therefore, if the clearance management between the outer peripheral portion of the thrust plate housed in the front housing and the inner peripheral portion of the front housing is insufficient, an abnormality may occur due to collision between the outer peripheral portion of the thrust plate and the inner peripheral portion of the front housing. Sound, or reduced durability due to wear of pins and long holes

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