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Processing method for radial slot cartridge receiver

A technology of casing processing and radial grooves is applied in mechanical equipment, machines/engines, liquid fuel engines, etc., which can solve the problems of expanding the stable working margin of the compressor and decreasing the efficiency, and achieve high social benefits and promotion value. Ease of processing and improved performance

Active Publication Date: 2015-03-04
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A widely used form of casing processing is various slotted casing processing structures. The traditional slotted casing processing structure is often carried out on the compressor rotor, but it often causes a drop in efficiency while expanding the stable working margin of the compressor.

Method used

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  • Processing method for radial slot cartridge receiver
  • Processing method for radial slot cartridge receiver
  • Processing method for radial slot cartridge receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] 1) First, model the compressor without slots on the side of the wheel cover, and conduct numerical simulation and flow analysis of its internal flow field to determine the dominant flow field structure and flow characteristics in the compressor, and clarify the compressor flow Areas within the track prone to stalling;

[0026] 2) Secondly, according to the area in the compressor flow channel determined in step 1) that is prone to stall, a single circumferential groove is opened along the different meridian positions of the compressor shroud side, and modeling and numerical simulation are performed on it, and the circumferential groove machines at different positions are compared Determine the best slotting position based on the expansion and stabilization effect of the casing and its influence on the efficiency of the compressor;

[0027] 3) Then, acc...

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Abstract

The invention provides a processing method for a radial slot cartridge receiver, which synthetically considers structural features of a centrifugal compressor and internal flowing state. The position in a vane diffuser passenger, which is easy to have a stall phenomenon, is provided with a radial slot along the side of a wheel cover. The processing method is characterized by processing a coverage range of a slot along the radial direction and the slot depth by using the designed result of another processing method for a circumferential slot cartridge receiver, i.e., comprising the following steps of: designing a processing proposal for the circumferential slot cartridge receiver to determine the best slot depth and the coverage range of the processed slot along the radial direction; and designing the processing proposal for the radial slot cartridge receiver, wherein the radial slot is specifically a straight slot distributed along the radial direction in a discrete manner. The basic thinking for the design is that the trend and distance of the radial slot are expected to guide the trend of low-speed fluid at the side of the diffuser wheel cover, and a reflow passage for low-speed fluid is provided, therefore, the blockage of a top passage is weakened, a stable working range of the compressor is greatly improved, and simultaneously, the peak-value efficiency and small-flow lateral pressure ratio are improved.

Description

technical field [0001] The invention relates to a processing method for a casing of a centrifugal compressor, in particular to a processing method for a casing of a radial groove. Background technique [0002] Centrifugal compressors have the advantages of small size, high single-stage pressure ratio and simple structure, and are increasingly used in many fields. In recent years, with the continuous improvement of people's demand and interest in micro-energy conversion systems, high speed, high pressure ratio, high efficiency, wide working conditions, and miniaturization have become one of the important trends in the development of centrifugal compressors, and their Performance makes increasingly demanding demands. Today's development trend of high speed and high load of compressors poses new challenges to the stable operation of compressors and its stability expansion technology, especially the unsteady flow instability represented by rotating stall and surge is a threat t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/42
Inventor 席光马岩
Owner XI AN JIAOTONG UNIV
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