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A centrifugal compressor with a/r nonlinear distribution of volute channel section

A centrifugal compressor and flow channel cross-section technology, which is applied to the components of pumping devices for elastic fluids, machines/engines, mechanical equipment, etc., can solve the problems of surge, unstable disturbance of centrifugal compressors, etc. Overall surge, delayed flow instability, improved aerodynamic performance and effect of flow stability

Active Publication Date: 2019-09-20
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under this real flow condition, the volute with a linear distribution of the cross-sectional area radius ratio (A / r) of the volute channel tends to increase the inhomogeneity of the flow field, which brings severe flow stability problems and induces the premature failure of the centrifugal compressor. Unstable disturbances and even surges occur

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  • A centrifugal compressor with a/r nonlinear distribution of volute channel section
  • A centrifugal compressor with a/r nonlinear distribution of volute channel section
  • A centrifugal compressor with a/r nonlinear distribution of volute channel section

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Embodiment Construction

[0015] Below in conjunction with accompanying drawing, content of the present invention is described in detail:

[0016] The present invention proposes a centrifugal compressor that adopts the flow passage section A / r nonlinear distribution volute, and its structure is as follows figure 1 As shown, it includes a casing 6, a centrifugal impeller 2, a back plate 4 and a diffuser 3. The centrifugal impeller 2 and the diffuser 3 are installed coaxially, and the centrifugal impeller 2 rotates under the drive of the shaft. The casing 6 is relatively fixed to the back plate 4 , and the outer end of the casing 6 forms a volute flow channel 5 . Such as figure 2 As shown in , the volute channel section 10 increases continuously along the impeller rotation direction in the circumferential direction, essentially the volute channel area radius ratio (A / r) increases continuously in the impeller rotation direction. The area-to-radius ratio (A / r) of the volute flow channel section is defi...

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Abstract

The invention relates to a centrifugal air compressor adopting non-linear distribution of the area-radius ratio (A / r) of the volute passage section and belongs to the technical field of turbo machines. The centrifugal air compressor comprises a case, a centrifugal impeller, a dorsal disk and a pressure expander. The A / r of the volute passage section in the centrifugal air compressor is non-linearly distributed in the circumferential direction, and the increasing rate of the A / r of the area, near a volute tongue, of the volute passage section is lower than the increasing rate of the A / r of thepart, in the other circumferential position, of the volute passage section. Distortion of a flow field inside the centrifugal air compressor can be restrained, the mixing loss of the flow field is effectively reduced, meanwhile, the nonuniformity of the flow field is effectively reduced, and accordingly the aerodynamic performance and flowing stability of the centrifugal air compressor are improved significantly.

Description

technical field [0001] The invention relates to a centrifugal compressor adopting the non-linear distribution of A / r of the volute channel section, belonging to the technical field of impeller machinery. Background technique [0002] The present invention relates to a centrifugal compressor adopting the non-linear distribution of volute channel cross section A / r, which relates to centrifugal compressors for superchargers for various purposes such as vehicles, ships, and aviation, and centrifugal compressors used in blowers, etc. compressor. [0003] Compared with the existing reciprocating piston compressors, impeller compressors such as centrifugal compressors have the advantages of high efficiency, light volume and weight, and stable operation. However, the operating range of the centrifugal compressor is limited, especially in non-design conditions such as small flow, due to the circumferential asymmetry of the volute geometry and the influence of the volute tongue struc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D17/10F04D29/42F04D29/44
Inventor 郑新前孙振中邹望之川久保知己玉木秀明王宝潼
Owner TSINGHUA UNIV