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Adjustable camber reflux device suitable for multi-stage centrifugal compressor and its control method

A recirculator and compressor technology, used in engine control, components of pumping devices for elastic fluids, pump control, etc. Small impact loss, the effect of improving the performance of the whole machine

Active Publication Date: 2021-12-28
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The installation angle of the blade inlet of the reflux device is related to the impact loss of the inlet of the reflux device and the flow conditions of the boundary layer on the blade surface. The performance is often better under design conditions, but the performance is poor under non-design conditions.
And under the condition of small flow rate, too large inlet installation angle will cause flow phenomena such as stall and vortex shedding on the blades of the recirculator to occur in advance, resulting in strong fluctuations in the pressure in the recirculator, triggering surge of the compressor, and changing the flow adjustment range. narrow

Method used

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  • Adjustable camber reflux device suitable for multi-stage centrifugal compressor and its control method
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  • Adjustable camber reflux device suitable for multi-stage centrifugal compressor and its control method

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] Throughout the drawings, the same reference numerals are used to designate the same elements or structures, wherein:

[0027] 1-actuator, 2-rotary actuator, 3-fixed disc, 4-transmission pull plate, 5-rotation pull plate, 6-rotary disc, 7-transmission connecting rod, 8-diffuser blade, 9-compression Machine impeller, 10-leading edge adjustment section, 11-tail e...

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Abstract

The invention discloses an adjustable camber reflux device suitable for multi-stage centrifugal compressors and a control method thereof, which is suitable for the field of multi-stage centrifugal compressors in compressed air energy storage systems, wherein the variable camber reflux device blades include independently adjustable Adjustable leading edge adjustment section and fixed trailing edge fixed section. The variable curvature reflux device can change the inlet installation angle of the leading edge adjustment section through a set of independent reflux device blade adjustment structure. The main advantage of the present invention is that the reflux device can better adapt to the upstream flow conditions when the working conditions of the multi-stage centrifugal compressor change, the blades reduce the inlet impact loss by adjusting the inlet installation angle, and improve the internal flow field conditions of the reflux device. The working performance of the compressor is improved, thereby improving the overall performance of the energy storage system.

Description

technical field [0001] The invention belongs to the technical field of compressed air energy storage, and relates to a reflux device of a multistage centrifugal compressor, in particular to an adjustable curvature reflux device suitable for a multistage centrifugal compressor and a control method thereof. Background technique [0002] Large-scale compressed air energy storage technology has the advantages of not being restricted by geographical conditions, high energy storage efficiency, environmental friendliness and recyclable waste heat and waste heat, etc. It is considered to be one of the most potential large-scale physical energy storage technologies. Combined with the characteristics of compressed air energy storage technology, the compressor used in the system is usually a multi-stage centrifugal compressor. The reflux device is one of the main components of the multi-stage centrifugal compressor, and its performance has an important impact on the efficiency, pressu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/46F04D29/66F04D27/02
CPCF04D29/462F04D29/667F04D27/0246F05D2270/62F05D2270/65
Inventor 梁奇陈海生左志涛张雪辉侯虎灿郭文宾
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI