Pump body for boric acid recycling pump

Abstract

The invention discloses a pump body for a boric acid recycling pump in the field of nuclear power equipment. The pump body comprises a water absorption chamber, a volute chamber, a pump shaft, an impeller, a pump cover and a shaft sleeve, an inlet flange is arranged at one end of the water absorption chamber, the other end of the water absorption chamber is axially connected with the volute chamber by a connecting portion, the impeller is disposed in the volute chamber, the rear end of the impeller is sleeved at the tail end of the pump shaft, the front end of the impeller is sleeved with the connecting portion, the shaft sleeve is sleeved on the pump shaft, the pump cover is sleeved on the outer wall of the shaft sleeve and is axially fixed to the volute chamber, the volute chamber is a single-volute type volute chamber, a water outlet pipe is arranged on the outer wall of the volute chamber, an outlet flange is disposed at the tail end of the water outlet pipe, and a pumping chamber is formed among the inner wall of the volute chamber, the pump cover and the impeller.

Description

technical field [0001] The invention relates to a pump body used for a boric acid recirculation pump in the field of nuclear power equipment. Background technique [0002] The boric acid recirculation pump is a kind of recirculation pump that is often used in nuclear power plants. The function of the boric acid recirculation pump is: during the operation of the nuclear power plant, in order to prevent the crystallization of boric acid in the boron injection tank, the boric acid recirculation pump injects boric acid The boric acid solution in the box is continuously circulated to ensure constant concentration and temperature of the boric acid solution. Another function of this pump is to complete the initial filling of the boron injection tank. [0003] The pump body of the boric acid recirculation pump includes a water suction chamber and a water pressure chamber. The water absorption chamber refers to the flow-through part between the inlet flange of the boric acid recirc...

AI Technical Summary

Problems solved by technology

If a traditional double volute type volute chamber is adopted, the cross-sectional area at the end of the outlet pipe will be too large, resulting in a sharp increase in the flow velocity of the boric acid solution at the end of the outlet pipe, and a large local resistance loss of the boric acid solution. The efficiency of the pump is reduced, and even the matching motor is burned

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