Scroll compressor

A technology of scroll compressors and compression chambers, applied in the direction of rotary piston machinery, mechanical equipment, engine components, etc., can solve the problem of preventing the rotating scroll disk, reduce the running sound, prevent the absolute value of performance from falling, Effect of reducing running sound

Active Publication Date: 2011-09-21
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to completely prevent the rotation of the orbiting scroll by the rotation prevention mechanism.

Method used

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no. 1 Embodiment approach

[0030] Hereinafter, for the first embodiment of the present invention, use figure 1 , figure 2 and Figure 4 Be explained.

[0031] figure 1 In , a longitudinal sectional view of the scroll compressor according to the first embodiment of the present invention is shown. The scroll compressor 1 has a housing 2 constituting an outer casing. The case 2 is configured by integrally screwing and fixing the front case 3 and the rear case 4 with bolts 5 . On the front case 3 and the rear case 4, flanges 3A and 4A for tightening are integrally formed at multiple positions on the circumference, for example, four positions at equal intervals, and the flanges 3A and 4A are connected to each other by bolts 5. By tightening, the front case 3 and the rear case 4 are integrally combined.

[0032] Inside the front housing 3 , a crankshaft (drive shaft) 6 is rotatably supported about an axis L of the crankshaft via a main bearing 7 and a sub bearing 8 . One end side of the crankshaft 6 (...

no. 2 Embodiment approach

[0060] Next, for the second embodiment of the present invention, using image 3 and Figure 4 Be explained.

[0061] The present embodiment differs from the above-mentioned first embodiment in that the volumes V1 and V2 of the pair of compression chambers 16 are made to have different sizes by changing the axial height on the outer peripheral side of the spiral wrap. The other points are the same as those of the first embodiment, and thus description thereof will be omitted.

[0062] In this embodiment, if image 3 As shown, the axial heights of the spiral wraps 14B, 15B on the outer peripheral end side of the stepped portions 14E, 15E formed on the fixed scroll 14 and the orbiting scroll 15 are different from each other, so that The volume V1 of the compression chamber 16 formed on the ventral side of the fixed scroll wrap 14B is different from the volume V2 of the compression chamber 16 formed on the ventral side of the orbiting scroll wrap 15B.

[0063] That is, from th...

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PUM

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Abstract

Provided is a scroll compressor wherein the characteristics of a so-called step-type scroll compressor are exploited to suppress the reduction of a performance or the occurrence of an abnormal noise, which is caused by a torsion moment applied to a rotary scroll. In a so-called step-type scroll compressor (1), when suctioning of gas is stopped in a plurality of pairs of compression chambers (16) which are symmetrical with respect to a point, the volume (V1) of the compression chamber (16) formed on the ventral surface side of a stationary scroll lap (14B) of a stationary scroll (14) is different from the volume (V2) of the compression chamber (16) formed on the ventral surface side of a rotary scroll lap (15B) of a rotary scroll (15).

Description

technical field [0001] The present invention relates to a so-called stepped scroll compressor in which a pair of fixed scroll and an orbiting scroll in which a compression chamber is formed has a stepped portion in the wrap direction. Background technique [0002] Among the scroll compressors, the following structure has been known in the past: each is provided at an arbitrary position along the scroll direction of the front end surface and the bottom surface of the spiral wrap (wrap) of the fixed scroll and the orbiting scroll. In the step portion, the wrap height on the outer peripheral side of the spiral wrap is higher than that on the inner peripheral side with the step portion as a boundary (for example, refer to Patent Document 1). This scroll compressor realizes high performance, small size and weight reduction of the scroll compressor by forming a scroll compressor capable of three-dimensional compression. In the scroll compressor capable of three-dimensional compres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/02F04C29/06
CPCF04C2270/13F04C18/0276F01C17/063F04C18/0215F04C18/02F04C29/06
Inventor 平田弘文鹈饲彻三山崎浩伊藤隆英
Owner MITSUBISHI HEAVY IND LTD
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