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Double-rear-slot casing processing device capable of effectively broadening flow range of compressor

A flow range and casing processing technology, which is applied to the components of pumping devices for elastic fluids, machines/engines, mechanical equipment, etc., can solve the problems of reduced efficiency, reduced stable working range of centrifugal compressors, etc., to achieve increased The effect of large clogging flow and broadening the stable flow range

Inactive Publication Date: 2015-11-18
CHINA NORTH ENGINE INST TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the boosting ratio continues to increase, the Mach number at the impeller inlet continues to increase, and the internal flow of the centrifugal compressor is transformed into a transonic flow structure, which will lead to a sharp decrease in the stable working range of the centrifugal compressor and a decrease in efficiency

Method used

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  • Double-rear-slot casing processing device capable of effectively broadening flow range of compressor
  • Double-rear-slot casing processing device capable of effectively broadening flow range of compressor
  • Double-rear-slot casing processing device capable of effectively broadening flow range of compressor

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Embodiment Construction

[0017] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0018] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0019] Such as Figures 1 to 3 As shown, the present invention includes a turbine casing 1 and an impeller 2. The turbine casing 1 includes an inner casing 11, an outer casing 12, and an air outlet duct 13. The outer casing 12 is sleeved outside the inner casing 11 and surrounds the inner casing 11 to form an air circulation chamber 14. , the inner shell 11 is an air flow channel 15, and the rear ends of the air circulation chamber 14 and the air flow channel 15 are all communicated with the outside world.

[0020] The impeller 2 is installed in the air passage 15 through the impeller shaft rotatably fixed at the front end of the inner casing. The impeller 2 is divided into main blades ...

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Abstract

The invention provides a double-rear-slot casting processing device capable of effectively broadening the flow range of a compressor. The double-rear-slot casting processing device comprises a turbine shell and an impeller. The turbine shell comprises an inner shell body, an outer shell body and an air outlet pipe. The inner shell body is sleeved with the outer shell body, and an air circulation cavity is defined by the inner shell body and the outer shell body. An air runner is arranged in the inner shell body. Both the rear end of the air circulating cavity and the rear end of the air runner are communicated with the outside. The impeller is arranged in the air runner through an impeller shaft fixed to the front end of the inner shell body in a rotating manner. The impeller is divided into a main blade and a splitter blade. The portion, between the front edge of the main blade and the front end of the splitter blade, of the inner shell body is provided with a first rear slot. The portion, located in the middle of the air runner, of the inner shell body is provided with a second rear slot. Both the first rear slot and the second rear slot are distributed at a certain angle in the peripheral direction. By means of the double-rear-slot casting processing device capable of effectively broadening the flow range of the compressor, the surging flow of the compressor can be reduced while the blocking flow of the compressor is increased effectively, and the purpose of broadening the stable flow range of the compressor is achieved.

Description

technical field [0001] The invention belongs to the field of internal combustion engines, and in particular relates to a double rear groove case processing device capable of effectively widening the flow range of a compressor. Background technique [0002] The requirements of high power density and plateau power recovery of internal combustion engines require the boost pressure ratio of the supercharger and compressor to be continuously increased. As the boosting ratio continues to increase, the Mach number at the impeller inlet continues to increase, and the internal flow of the centrifugal compressor is transformed into a transonic flow structure, which will lead to a sharp decrease in the stable working range of the centrifugal compressor and a decrease in efficiency. The supercharged internal combustion engine involves the matching between the rotary impeller machinery and the reciprocating piston. Especially for vehicle operating conditions, due to the wide engine speed...

Claims

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Application Information

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IPC IPC(8): F04D29/42F04D29/66
Inventor 黄磊刘莹佟鼎陈化杨磊李书奇葛炜程江华靳荣
Owner CHINA NORTH ENGINE INST TIANJIN
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