Design device of interstage air-entrapping structure of centrifugal compressor

A technology of centrifugal compressors and air-filling structures, applied in mechanical equipment, parts of pumping devices for elastic fluids, calculations, etc., can solve problems such as pulsation, affecting stage efficiency, and unit failure

Active Publication Date: 2015-04-22
SHENYANG BLOWER WORKS GRP INSTALLATION MAINTENANCE FITTINGS
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Problems solved by technology

If the gas filling structure is not designed properly, it may cause a large distortion in the flow field of the mixed gas outlet
Since the current development of the basic stage is based on the design of uniform flow conditions, the inhomogeneity of the inlet flow field of the next stage directly causes the inlet angle of the blade to change in a wide range, which will not only affect the...

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  • Design device of interstage air-entrapping structure of centrifugal compressor
  • Design device of interstage air-entrapping structure of centrifugal compressor
  • Design device of interstage air-entrapping structure of centrifugal compressor

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Embodiment Construction

[0031] see figure 1 As shown, the design device for the interstage gas filling structure of the centrifugal compressor provided by the embodiment of the present invention includes a first design module 10 , an air filling volute design module 20 and an airfoil design module 30 . Wherein, the first design module 10 sets up an air filling port at the bend of at least one stage of the centrifugal compressor, and adds an air filling structure at the air filling port, so as to introduce the air filling airflow. see Figure 2-4 Specifically, an air filling port is provided at the bend 4 of the at least one-stage centrifugal compressor, and an air filling structure is added at the air filling port, so that the main air flow 9 is introduced into the air filling airflow 7 . The aeration structure includes an aeration volute 1 and an aeration volute 2 . Wherein, the volute of the air-filled volute is a variable-section volute. The aeration guide vanes 2 are evenly distributed in the ...

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Abstract

The invention provides a design device of an interstage air-entrapping structure of a centrifugal compressor. The design device of the interstage air-entrapping structure of the centrifugal compressor comprises a first design module. An air-entrapping hole is arranged on the curve of the centrifugal compressor with at least one stage. The air-entrapping hole is further provided with an air-entrapping structure so that air-entrapping airflow can be introduced. The air-entrapping structure comprises an air-entrapping spiral housing and an air-entrapping guiding vane. An air-entrapping spiral housing design module is used for designing a cross section of the air-entrapping spiral housing. A vane-shaped design module is used for designing a vane shape of the air-entrapping guiding vane. According to the design device of the interstage air-entrapping structure of the centrifugal compressor, when the number of a vane wheel is multiple, the spacing in the axial direction of the compressor is shortened, so that the critical speed of revolution of a machine set is easier to be exceeded.

Description

technical field [0001] The invention relates to the technical field of centrifugal compressors, in particular to a design device for an interstage air-filling structure of a centrifugal compressor. Background technique [0002] Due to the continuous expansion of petrochemical production scale and the increasingly complex chemical process, centrifugal compressor units often need to add gas somewhere between stages in process devices such as large ethylene and large chemical fertilizers. If the gas filling structure is not designed properly, it may cause a large distortion in the flow field of the mixed gas outlet. Since the current development of the basic stage is based on the design of uniform flow conditions, the inhomogeneity of the inlet flow field of the next stage directly causes the inlet angle of the blade to change in a wide range, which will not only affect the efficiency of the stage, but also cause rotation in severe cases. Severe air pulsation phenomena such as...

Claims

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Application Information

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IPC IPC(8): G06F17/50F04D29/42F04D29/44F04D17/12
Inventor 李亮王宇韩宇飞韩磊张富春张鹏郭飞虎
Owner SHENYANG BLOWER WORKS GRP INSTALLATION MAINTENANCE FITTINGS
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