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Big and small impeller vane impeller with non-full height small blade and compressor machine

A blade impeller and small blade technology, applied in the field of blade impeller mechanical devices, can solve the problems of complex blade structure and low efficiency, and achieve the effect of suppressing secondary flow

Inactive Publication Date: 2008-05-07
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] There are at least the following disadvantages in the above-mentioned prior art: the structure of the blade is complicated and the efficiency is low

Method used

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  • Big and small impeller vane impeller with non-full height small blade and compressor machine
  • Big and small impeller vane impeller with non-full height small blade and compressor machine

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Embodiment Construction

[0019] The large and small blade impeller with non-full-height small blades of the present invention, its preferred specific embodiment is shown in Figure 4, including a plurality of large blades 5, and small blades are arranged between two adjacent large blades 5 6. The radial height of the small blade 6 may be less than or equal to 20% of the height of the large blade 5, and may be 3%, 10%, 15%, 20% and so on.

[0020] The axial chord length of the small blade 6 may be 30%-85% of the axial chord length of the large blade 5, and may be 30%, 45%, 55%, 70%, 85% and so on. That is to say, the small blade is not full size in the axial direction, but starts from a certain position in the axial direction. The trailing edge of the small blade 6 can be flush with the trailing edge of the large blade 5, or it can be slightly ahead of or behind the rear of the large blade 5. edge.

[0021] The starting arc of the small blade 6 can be the same as the central arc of the large blade 5 . ...

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PUM

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Abstract

The invention discloses a compressor and an impeller with big and small blades in which the small blade is non-total-height. The invention is characterized in that: a blade is arranged between two adjacent big blades of the impeller with big and small blades; the height in radial direction of the small blade is equal to three percents to fifteen percents of the height in radial direction of the big blade; the string length in axial direction of the small blade is thirty percents to eighty-five percents of the string length in axial direction of the big blade; the initial arc of the small blade is the same as the arc in the central section of the big blade, and the tailing edge is aligned with the tailing edge of the big blade. The invention has the advantages that not only the structure and efficiency of the blade is not influenced, but also the secondary flow of the airflow near the wheel hub surface and at the root section of the blade is inhibited effectively.

Description

technical field [0001] The invention relates to a blade-type impeller mechanical device, in particular to an impeller and an air compressor. Background technique [0002] Vane compressors are generally used to pressurize gas and are divided into axial flow, centrifugal and diagonal flow compressors. The air flow mode of axial flow compressor is axial intake and axial exhaust; the flow mode of centrifugal compressor gas is axial intake and radial exhaust; the diagonal flow compressor is axial flow and centrifugal compressor. The compromise of the machine, the axial intake, and the exhaust at a certain angle with the axial. Axial flow and diagonal flow compressors include impellers, including rotors and stators, with blades on the impellers. [0003] The compressor performs work on the airflow through the rotor blades, transforms the pressure energy and kinetic energy of the micro-airflow, and then converts the excess kinetic energy into pressure energy through the stator bl...

Claims

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Application Information

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IPC IPC(8): F04D29/30F04D29/38
CPCF04D29/544F04D29/324
Inventor 王洪伟陈懋章刘火星蒋浩康刘宝杰
Owner BEIHANG UNIV
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