Model level of pipeline compressor with discharge coefficient being 0.0322 and design method of impeller thereof

Abstract

The invention provides a model level of a pipeline compressor with the discharge coefficient being 0.0322. The model level of the pipeline compressor with the discharge coefficient being 0.0322 comprises an impeller, a vaneless diffuser, a bend and a return channel. The impeller is located at the position of an inlet of the model level. The vaneless diffuser is arranged at an outlet of the impeller. The return channel is located at the position of an outlet of the model level. The vaneless diffuser and the return channel communicate with each other through the bend. The machine mach number Mu2 is 0.35-0.65, the design point discharge coefficient phi1 is 0.0322, the design point energy head coefficient tau is 0.614, the polytropic efficiency Etapcl under the design discharge coefficient working conditions at various mach numbers is 0.846-0.851, and the application discharge range is 60%-150% that of the design point. The invention further provides a design method of the impeller of the model level. The model level of the pipeline compressor with the discharge coefficient being 0.0322 is high in efficiency, high in energy head coefficient, large in hub ratio and small in span, by the adoption of the model level of the pipeline compressor with the discharge coefficient, a light medium compressor can have high operation efficiency and wide working condition range; and meanwhile, the work rotation speed of a rotor can be reduced, the space of a bearing is reduced, and the stability of the rotor is improved.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a model stage and impeller design method of a pipeline compressor with a flow coefficient of 0.0322. Background technique [0002] The pipeline compressor is the key equipment of the national key project of the West-to-East Gas Pipeline. During its research and development process, the design of the model level is very critical, and the development of new products depends on the corresponding model level. [0003] The existing pipeline model stage has disadvantages such as small wheel-to-hub ratio, large axial span, and low efficiency. Therefore, in the process of product design, the shaft diameter is small and the shaft length is long, and the critical speed of the product, the stability of the rotor, and the stiffness of the shaft, etc. There are big problems in this aspect, which brings great difficulties to product design. In addition, the performance of the unit is lowe...

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Problems solved by technology

[0004] In order to solve the above-mentioned problems existing in the existing pipeline model stage, the purpose of the present invention is to provide a pipeline compressor model stage with a flow c

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