Hydraulic design method of torispherical pump body for nuclear main pump

Abstract

The invention relates to a hydraulic design method of a torispherical pump body for a nuclear main pump. The hydraulic design method provides design formulas for main geometric parameters of a pump body, comprising an estimated base circle diameter D4 of the pump body, a base circle diameter D5 of the pump body, an inlet width b5 of the pump body, an estimated area F3 of a discharge section of the pump body, an area F of a flow section of the pump body, an average velocity v of the flow section of the pump body, an estimated maximum outer diameter D8 of the pump body, a maximum outer diameter D9 of the pump body, a width L2 of the section of the pump body, an inflow position L3 of the pump body, an inlet diameter D6 of a shrink segment of an outlet of the pump body, an outlet diameter D7 of the shrink segment of the outlet of the pump body, a length L of the shrink segment of the outlet of the pump body, a taper f of the shrink segment of the outlet of the pump body, a contraction angle phi of the contraction segment of the outlet of the pump body, a diffuser angle theta of the entrance segment of the pump body, an inlet diameter D0 of the entrance segment of the pump body and the like. Through the adoption of the hydraulic design method disclosed by the invention the operation reliability and the operation stability of the nuclear main pump can be improved, the service life and the maintenance cycle are prolonged, and the possibility of a nuclear accident occurred in a nuclear power plant is reduced.

Description

Technical field [0001] The invention relates to a design method of the main flow-passing parts of a nuclear main pump, in particular to a design method of a nuclear main pump body. Background technique [0002] Nuclear power pumps require long-term trouble-free operation and extremely strict requirements for reliability and safety. In many cases, it is also required to ensure a safe stop in an emergency. Since the leakage of radioactive liquid poses a potential threat to the environment and the human body, it is necessary to ensure that these pumps do not leak or leak within a controllable range. In terms of structural design, they are installed in a container as a whole, which also causes the use of nuclear power. The pump cost is high. [0003] Nuclear power pumps are nuclear pressure-bearing equipment and should comply with corresponding nuclear power regulations. According to the specifications, nuclear equipment is divided into three levels. The definition of nuclear first...

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Problems solved by technology

However, compared with normal temperature and pressure conditions, high temperature and high pressure only changes the physical parameters of the working medium, and does not change the head of the pump, and the efficiency of the pump is slightly improved.

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