Multi-stage vane pump with special flow guide structure and multi-stage partial flow pump

Abstract

The invention belongs to a multi-stage vane pump with a special flow guide structure and a multi-stage partial flow pump with a special flow guide structure in fluid machinery, solves the problems of large hydraulic loss, heavy weight, large occupied space and unsatisfactory flow guide performance of the flow guide structure of the existing multi-stage pump, and solves the design and manufacturing problems of pumps with low specific speed. The multi-stage pump is characterized in that a part flow guide seat corresponding to the outer side of the impeller is arranged between the pump cover and the guide vane or the pump body, one or more spiral flow guide surfaces are arranged on the flow guide seat or various flow guide seat assemblies and in a space formed by cylindrical surfaces or conical surfaces on the inner side of the flow guide seat assemblies and the outer side of the impeller, and the multiple sets of single-stage assemblies are installed into various multi-stage pumps. Fluid is mainly guided in a tangential flowing mode, the structure of the tangential guide vane can be called as a tangential guide vane, and the tangential guide vane is a guide vane in a special guide mode after a radial guide vane, a runner guide vane and a space guide vane of a multi-stage vane pump. The device is mainly used in chemical industry, petrochemical industry and the like requiring high pressure and occasions requiring small structure and light weight.

Description

technical field [0001] The invention belongs to a multistage pump in fluid machinery, and relates to a guide vane type multistage vane pump and a multistage partial flow pump. Background technique [0002] In the guide vane type multi-stage vane pump, especially in the guide vane type multi-stage centrifugal pump and the guide vane type multi-stage mixed flow pump, radial guide vanes are provided, including positive guide vanes, annular spaces or bends, The diversion structure of the anti-guide vane has problems such as excessive radial size and heavy weight. The velocity direction of the liquid needs to undergo two sharp turns from radial to axial, and then from axial to radial. The flow channel through the guide vane enters the inlet of the next stage impeller. There are large hydraulic losses such as liquid turns, collisions, and local vortices, and the ideal performance cannot be achieved. [0003] In the multi-stage partial flow pump, such as the patent application of...

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to use multiple sets of the above-mentioned single-stage components to assemble, develop and provide another multi-stage pump product with a large number of special diversion structures, and solve the problem of multi-stage pumps, especially low specific revolutions. Multi-stage pump design cumbersome problems

Images