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Combined closed impeller with milled blades and impeller manufacturing method

A closed impeller and milling technology, which is applied in the direction of blade support elements, manufacturing tools, metal processing equipment, etc., can solve the problems of complex structure and difficult manufacturing of closed impellers, so as to improve turbine efficiency and reduce gap air leakage The effect of reducing the amount of friction loss

Pending Publication Date: 2022-02-25
XINXIANG AVIATION IND GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the structure of the closed impeller is complex and difficult to manufacture

Method used

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  • Combined closed impeller with milled blades and impeller manufacturing method
  • Combined closed impeller with milled blades and impeller manufacturing method
  • Combined closed impeller with milled blades and impeller manufacturing method

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing and embodiment the application will be further described:

[0034] related technologies, such as figure 1 As shown in the picture on the right, the closed impeller includes: a front cover, a rear cover and blades, the structure is complex and difficult to manufacture. Moreover, this integral closed impeller can only be cast, and casting has the disadvantage of low impeller strength.

[0035] The turbo cooler is a vital cooling accessory in the aircraft environmental control system, and the impeller of the turbo cooler generally adopts a semi-open type ( figure 1 (left picture)) and closed structure (1 (right picture)), of which the semi-open structure is the most common, because the impeller speed is generally above 50,000, up to 100,000rpm, which requires extremely high impeller strength, semi-open impeller Since there is no front cover plate, the blade can be milled by integral five-axis CNC, and the strength of the imp...

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PUM

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Abstract

The invention provides a combined closed impeller with milled blades and an impeller manufacturing method, and belongs to the technical field of turbine cooler blades. The impeller is of a split combined structure and comprises an inducer (twisted blades) and a radial wheel (straight blades). The split structure simplifies the blades of the two parts, the blades can be milled respectively, and the machined inducer and the machined radial wheel are combined together in an interference fit mode. A combined structure is adopted, the breakthrough that a closed impeller adopts milling machining is achieved, and all the advantages of a traditional closed impeller and a semi-open impeller are integrated, namely, the closed impeller has the high strength equal to that of the semi-open impeller, and has the high efficiency of a closed disc and zero leakage when the axial force of a rotor is balanced.

Description

technical field [0001] The application belongs to the technical field of turbine cooler blades, and in particular relates to a combined closed impeller whose blades are milled and a method for manufacturing the impeller. Background technique [0002] The turbo cooler is a vital cooling accessory in the aircraft environmental control system, and the impeller, as a key component of the turbo cooler, determines the performance of the turbo cooler. The impeller is a high-speed rotating pneumatic component. Because of the complex gas flow in it, the design, shape and manufacture of the impeller are very complicated. The design of the impeller and the shape of the blade are the decisive factors that determine the performance of the turbo cooler. The measure of the turbo cooler is the adiabatic efficiency. When the impeller rotates at high speed, the gas particles close to the surface of the wheel disc are driven by viscosity due to the viscosity, and are thrown to the rim under t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/04B23C3/18
CPCF01D5/048F01D5/043B23C3/18F05D2300/173
Inventor 张跃跃蔡萧遥张永革袁立柱叶明亮李文进
Owner XINXIANG AVIATION IND GROUP