Guide vane for improving self-priming performance of jet-type centrifugal pump

Abstract

The invention relates to a guide vane for improving self-priming performance of a jet-type centrifugal pump. The method is characterized in that baffle plates with the same number of guide vane outlets are added on the back surface of a prototypical guide vane, wherein the axial dimension of the baffle plates is larger than or equal to the distance from the back surfaces of the guide vane outlets to the farthest position of a pump cavity outlet; the radial dimension of the baffle plates is flush with the upper edges of the guide vane outlets; the thickness of the baffle plates can be the same as the thickness of radial reinforcing ribs; the baffle plate number N1 is equal to the guide vane outlet number N3; and included angles of the baffle plates and the radial reinforcing ribs refer to the description. Through the adoption of the guide vane of the form, outflow from the circumferential direction of the guide vane outlets can be effectively blocked, gases and liquids in a pump cavity are fully separated, and the purpose that the self-priming performance of the jet-type centrifugal pump is achieved under the situation that the volume of the pump cavity is relatively small or an outlet of the pump cavity is relatively close to the guide vane.

Description

technical field [0001] The invention relates to a main component of a jet type centrifugal pump, in particular to a guide vane which can improve the self-suction performance of the jet type centrifugal pump. Background technique [0002] The jet centrifugal pump is a water pump designed by combining jet and centrifugal impeller. Compared with ordinary centrifugal pumps, jet-type centrifugal pumps have the advantages of reliable operation, convenient use, no need for irrigation in the second start, no need to install bottom valves, and self-priming, etc., and have broad prospects in water-saving systems such as garden sprinkler irrigation and agricultural drip irrigation. . The jet-type centrifugal pump is a self-priming pump. The self-priming performance indicators of the self-priming pump mainly refer to the self-priming time and self-priming height. The quality of the self-priming performance is one of the important indicators for evaluating the self-priming pump. Consid...

AI Technical Summary

Problems solved by technology

Considering factors such as the use environment and ease of movement, the volume of the pump cavity of the jet centrifugal pump will be limited in the development process, which will easily cause the gas to be coupled by the liquid flow during the self-priming process of this type of pump. Circular motion in the pump chamber, the gas-liquid two-phase circular flow will lead to insufficient gas-liquid separation inside the pump chamber, and the gas-liquid two-phase circular flow flowing through the pump chamber outlet will hinder the discharge of the separated gas to the pump chamber outlet , which ultimately affects the self-priming performance, making it unsatisfactory to user requirements

Images