New structure of self-priming centrifugal pump

Abstract

The invention discloses a new structure of self-priming centrifugal pump. The structure of a pressurized-water chamber of a single-stage self-priming centrifugal pump is designed into a ring shape; the outlet of an impeller is provided with a guide vane in an adding manner; the radial direction of the guide vane outlet is a closed runner which forms a liquid runner with return guide vane at the back of guide vane; a radial cover and a return guide vane cover are arranged in an adding manner; the liquid flow into the center of the pressurized-water chamber; as the pressurized-water chamber haslarge area, which reduces impact loss of the pump, improves efficiency of the pump, reduces velocity circulation of the pump, quickens mixing and separating speed of gas and liquid in the pump and improves the self-priming time of the pump; the guide vane and a spiral case of the combined type pressurized-water chamber of the guide vane and the spiral case can be respectively cast and processed, and aluminium alloy pressure casting and nonmetallic material manufacture and other new processes can be adopted. The technology not only has good process property, light weight and convenient operation, but also reduces the radial force of the pump, lowers the noise, improves the reliability and provides powerful technical support for the light development.

Description

technical field [0001] The invention belongs to fluid machinery, in particular a self-priming centrifugal pump with a new structure, which is mainly used in industrial water supply, sewage treatment, agriculture, nursery, tea garden irrigation, forests, urban buildings, commercial network fire extinguishing and other places. Background technique [0002] At present, ordinary self-priming centrifugal pumps mainly have two structural forms, one is an internal mixing self-priming pump, and the other is an external mixing self-priming pump. Large volume, high cost, slow self-priming, and low efficiency, especially bring losses to forest fire fighting and other places due to the weight of the pump, self-priming time and other reasons. Contents of the invention [0003] In order to solve the shortcomings of existing self-priming centrifugal pumps such as complex structure, difficult manufacturing process, large volume, high cost, slow self-priming, and low efficiency, the presen...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of existing self-priming centrifugal pumps such as complex structure, difficult manufacturing process, large volume, high cost, slow self-priming, and low efficiency, the present invention provides a self-priming centrifugal pump with a new structure. The above-mentioned deficiencies have been overcome, and the structure of the pressurized water chamber of the single-stage self-priming centrifugal pump is designed to be annular, and guide vanes are added at the outlet of the impeller, and the radial flow channel at the guide vane outlet forms a flow channel with the back of the guide vane, (addition of a radial cover and anti-guidance Leaf cover), the liquid flows to the center of the pressurized water chamber, due to the large area of ​​the pressurized water chamber, the impact loss of the pump is reduced, and the efficiency of the pump is improved; the velocity circulation of the pump is reduced, and the speed of gas-liquid mixing in the pump is accelerated. Increased pump self-priming time

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