Uniform-screw-pitch pulp pump and impeller hydraulic design method of uniform-screw-pitch pulp pump

Abstract

The invention provides a uniform-screw-pitch pulp pump and an impeller hydraulic design method of the uniform-screw-pitch pulp pump. The impeller hydraulic design method is characterized in that the flow conditions are improved by selecting the proper impeller inlet equivalent diameter D0, the proper impeller inlet rim diameter Dy1, the proper impeller inlet hub ratio dh1 and the like, and meanwhile the outer diameter of an impeller rim and the distance between a front abrasion-resistant lining and a rear abrasion-resisting lining are reasonably selected according to the diameters of medium particles required to be conveyed by the pulp pump to solve the problems that an impeller of the pulp pump is blocked, wound and even jammed. According to the uniform-screw-pitch pulp pump and the impeller hydraulic design method of the uniform-screw-pitch pulp pump, solid objects and long-fiber-shaped objects can smoothly pass through the impeller, the impeller is prevented from being blocked and jammed, the excellent hydraulic performance is achieved, the work efficiency of a pulp pump production line is improved, and the uniform-screw-pitch pulp pump and the impeller hydraulic design method of the uniform-screw-pitch pulp pump can be applied to the papermaking industry.

Description

technical field [0001] The invention belongs to the technical field of pumps, in particular to a hydraulic design method for equal-pitch pulp pump impellers. Background technique [0002] Water pumps are used to transport sewage and pulp in the production process of the paper industry. Among them, the transportation of pulp is the core process in the production of papermaking enterprises, and this process must be completed with the help of pulp pumps. [0003] Pulp pump is a kind of universal and special machine. Since the medium it transports is mostly multi-phase fluid, it has extremely high requirements on the flow performance of its channel. In addition, its unique channel form and impeller The rotation makes the flow field inside the pump body always have different degrees of flow phenomena such as vortex, secondary backflow, and off-flow, which makes the flow inside the pump more complicated. The traditional pump impeller hydraulic design methods are mostly based on ...

AI Technical Summary

Problems solved by technology

This method can also be used in the process of pulp pump conveying multiphase fluids such as pulp, but during pulping and slag removal, some solids and long fibers are difficult to pass through the impeller and entangled on the impeller, resulting in The impeller is clogged or even stuck, resulting in frequent cleaning and maintenance, making the entire production line unable to operate normally and reducing work efficiency

[0004] However, the existing pulp pumps cannot effectively solve the problems of blockage, entanglement or even jamming during operation.

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