Double-screw pump provided with elastic lining layer

Abstract

The invention relates to a double-screw pump provided with an elastic lining layer, which is characterized by comprising a screw 1 and a pump sleeve 2, wherein a surface layer lining of the screw 1 is provided with a screw surface layer elastic body 3 or / and an inner surface lining of the pump sleeve 2 is provided with an inner pump sleeve surface elastic body 4. With the arrangement of a layer of the elastic body at the screw surface layer or the pump inner lining, the meshing performance between the screw and the pump sleeve is improved, the processing precision of the screw or the pump sleeve is reduced, the processing cost of a key element of the pump is lowered, the comprehensive mechanical properties of the double-screw pump is enhanced, the volumetric efficiency of the pump and the pump efficiency are improved, the adaptability of the double-screw pump on mediums is increased, and the application field is broadened.

Description

Technical field [0001] The invention belongs to the technical field of screw pumps, and particularly relates to a twin screw pump with an elastic lining. Background technique [0002] Twin screw pump is the main type of screw pump in positive displacement pumps. Because of its compact structure, high utilization rate of unit materials, less area, and higher pump efficiency than centrifugal pumps, it has been widely used. However, since the pump sleeve of the twin-screw pump and the screw meshed with it are made of metal materials, in order to prevent interference in meshing and rotation, the rigidity and thermal expansion and contraction of metal materials need to be considered, and the adaptation to different media must be considered. Therefore, high requirements must be put forward on the shape and position tolerance and machining accuracy of the screw and pump sleeve to ensure that the pump has better comprehensive mechanical properties and higher pump efficiency, which increa...

AI Technical Summary

Problems solved by technology

However, since the pump sleeve of the twin-screw pump and the screw meshing with it are made of metal materials, in order to prevent interference with the meshing rotation, the rigidity and thermal expansion and contraction of the metal material must also be considered, and the adaptation to different media must also be considered. capacity and other factors, so the shape and position tolerance and machining accuracy of the screw and the pump sleeve must be very high, in order to ensure that the pump has better comprehensive mechanical properties and higher pump efficiency, which increases the manufacturing cost of the above pump , which restricts the improvement of the comprehensive mechanical properties of the pump, reduces the pump efficiency, and limits its application field

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