Novel submersible centripetal pump device

Abstract

The invention discloses a novel submersible centripetal pump device and relates to the field of centripetal pumps. The novel submersible centripetal pump device comprises a centripetal pump body, a plurality of inlets are formed in the peripheral wall of one end of the centripetal pump body at intervals in the circumferential direction of the centripetal pump body, an outlet is formed in the end face of the other end of the centripetal pump body, and a front guide vane, a rotatable impeller and a rear guide vane are sequentially arranged in the centripetal pump body in the axial direction of the centripetal pump body. The end face of the end, away from the outlet, of the centripetal pump body is connected with a pump shaft coaxially connected with the impeller, and the front guide vane is used for guiding fluid entering the inlets in the radial direction of the centripetal pump body to flow through the impeller in the axial direction of the centripetal pump body. The rear guide vane is used for guiding fluid flowing through the impeller in the axial direction of the centripetal pump body to move towards the axis of the centripetal pump body in the spiral direction and be discharged from the outlet. According to the novel submersible centripetal pump device, the pressure of fluid at the outlet can be improved, and therefore higher lift can be achieved under the condition of low flow.

Description

technical field [0001] The present application relates to the field of centripetal pumps, in particular, to a novel submersible centripetal pump device. Background technique [0002] Centrifugal pump is currently the most widely used, the largest amount of a pump device with the highest output value. However, the existing centrifugal pumps have some defects: First, the overall working efficiency is low, and its theoretical basis has congenital defects. The efficiency of domestic IS single-suction centrifugal pumps is generally below 60%, while the efficiency of multi-stage centrifugal pumps is even lower. ; Second, the nonlinear flow field makes it difficult to calculate the physical quantities such as flow and head, and to design the impeller; third, it is suitable for large-flow fluids, but it is less efficient and limited for fluids that supply small flow and large pressure head; Fourth, In the case of incomplete design or improper operation by the operator, the discharg...

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Problems solved by technology

However, there are some defects in the existing centrifugal pumps: First, the overall working efficiency is low, and its theoretical basis has congenital defects. The efficiency of domestic IS single-suction centrifugal pumps is generally below 60%, while the efficiency of multi-stage centrifugal pumps is even lower. ; Second, the nonlinear flow field leads to difficulties in the calculation of physical quantities such as flow and head and impeller design; third, it is suitable for large flow fluids, and the efficiency is low and limited for fluids with small flow and large pressure heads; fourth, In case of incomplete design or improper operation by the operator, the discharged liquid may easily contain air or foam

However, the defects of existing centripetal pumps are that when riveting, the riveting is not firm enough to cause problems such as poor fit between the pump body and the pump cover, so that there is a gap between the pump body and the pump cover, resulting in a reduction in the delivery capacity and generation of transport fluid. Foam, emulsification and other phenomena; secondly, during the process of fluid delivery by the centripetal pump, the fluid movement direction is changed from tangential to vertical axial direction, resulting in large energy loss and low efficiency

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