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A model stage of mcl compressor and its design method

A compressor and model technology, applied in mechanical equipment, engine function, machine/engine, etc., can solve the problems of low unit performance, small shaft diameter, large axial span, etc., achieve high variable efficiency, reduce consumption power, saving energy and the effect of

Active Publication Date: 2017-07-21
SHENYANG TURBO MASCH CORP
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  • Application Information

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Problems solved by technology

[0003] This model stage is generally used in the first stage of MCL (horizontally split) compressors due to its large flow coefficient. During the process, the diameter of the rotating shaft is small and the shaft is long, so there are big problems in the critical speed of the product, the stability of the rotor and the rigidity of the shaft, which brings great difficulties to the product design. In addition, the performance of the unit is better than that of similar foreign products. Low

Method used

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  • A model stage of mcl compressor and its design method
  • A model stage of mcl compressor and its design method
  • A model stage of mcl compressor and its design method

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Embodiment Construction

[0082] Such as figure 1 As shown, the structure of the meridian flow channel of the MCL compressor model stage of the present invention is as follows:

[0083] The MCL model stage is located in the compressor and is provided with an impeller 1, a vaneless diffuser 2, a curve 3, and a reflux device 4. The impeller 1 is set at the inlet of the model stage, and the reflux device 4 is set at the outlet of the model stage; The impeller 1 is a closed ternary flow impeller, and the refluxer 4 adopts full-height banana blades. After design and analysis, the meaning of each dimension in the meridian channel is defined:

[0084] D 0 —The entrance diameter of the cover plate;

[0085] D 2m —The average outer diameter of the impeller outlet;

[0086] D 3 —Inlet diameter of vaneless diffuser;

[0087] D 4 —Exit diameter of vaneless diffuser;

[0088] D 5 —The inlet diameter of the refluxer;

[0089] D 6 —The outlet diameter of the refluxer;

[0090] b 2 —The width of the impeller outlet;

[0091] ds—...

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Abstract

The invention belongs to a high-efficiency, high-energy head-closed type large flow coefficient model stage for centrifugal compressors, specifically a model stage of an MCL compressor and a design method thereof, which is applicable to the modular design of various MCL compressor products; The model stage includes an impeller, a vaneless diffuser, a bend and a reflux device. The impeller is located at the inlet of the model stage, and a vaneless diffuser is provided at the outlet of the impeller. The diffuser and the reflux are connected through bends; the design machine Mach number Mu2=0.85 of this model stage, the flow coefficient Ф1=0.15, the energy head coefficient τ=0.715, and the model stage of the variable efficiency ηpol=0.856. Adopting the high-efficiency, high-energy head-closed type large flow coefficient model stage of the present invention enables the MCL centrifugal compressor to have higher operating efficiency and a wider range of working conditions.

Description

Technical field [0001] The invention belongs to a high-efficiency, high-energy head, closed-type large-flow coefficient model stage for centrifugal compressors, and is specifically an MCL compressor model stage and a design method thereof, and is suitable for the modular design of various MCL compressor products. Background technique [0002] In the development process of the centrifugal compressor, the design of the model stage is very important, and the development of new products depends on the corresponding model stage. [0003] This model stage is generally used in the first stage of MCL (horizontal split) compressor due to its large flow coefficient. However, because the original model stage has shortcomings such as small wheel hub ratio, large axial span, and low efficiency, it is in product design During the process, the shaft diameter and shaft length are small, and there are major problems in the critical speed of the product, the stability of the rotor, and the rigidity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/28F04D29/44
CPCF04D29/284F04D29/441F05D2260/81
Inventor 么立新裴威郭杨
Owner SHENYANG TURBO MASCH CORP
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