Hydraulic system for precisely arranging stator shielding sleeve of nuclear main pump in gapless attachment way

Abstract

The invention discloses a hydraulic system for precisely arranging a stator shielding sleeve of a nuclear main pump in a gapless attachment way, and belongs to the field of nuclear power. The hydraulic system is used for realizing the precise arrangement of the stator shielding sleeve and a stator in a gapless plastic deformation attachment way. Compared with the prior art, the hydraulic system for precisely arranging the stator shielding sleeve of the nuclear main pump can realize repeated uniform loading and unloading along the long diameter direction of the stator according to bulging pressure and a loading path which are obtained by analysis on a process numerical value, thereby accurately controlling the plastic deformation of a material to realize the gapless plastic deformation attachment of the shielding sleeve. The system has a special gas exhaust part, so that gases can be effectively exhausted out of a sealed chamber; a proportional overflow valve is adopted by a booster part, and pressure is controlled to be output according to requirements by controlling the input current of the proportional overflow valve; due to the combination of a second gear pump and a booster, the upper limit of the pressure can be increased, and a wide pressure range can be obtained; and the pressure can be accurately controlled through an electronic control device such as a programmable logic controller (PLC) and a pressure transmitter.

Description

technical field [0001] The invention relates to a hydraulic system for precision assembly of a nuclear main pump stator shielding sleeve, which is mainly used to realize gapless plastic deformation attachment between the nuclear main pump shielding sleeve and the stator, and belongs to the field of nuclear power. Background technique [0002] Nuclear power is one of the important clean energy sources. The nuclear main pump in the nuclear power equipment is the "heart" of the nuclear power plant. For the third-generation passive nuclear reactor, it uses a shielded pump with a shielded motor, and the inner surface of the motor stator is covered with a stator shielding sleeve. The stator shielding sleeve of the nuclear main pump is used to prevent the conveyed liquid medium from contacting the stator core and stator winding, and preventing these parts from being corroded. Therefore, its processing and assembly quality directly affects the normal operation of the nuclear main ...

AI Technical Summary

Problems solved by technology

The vacuum method is the attachment of the stator shielding sleeve deformed by using the difference in internal and external air pressure. This process has the disadvantage that the forming pressure is not easy to control; the hydraulic test method has the disadvantages that the loading pressure cannot be changed according to the demand and the degree of attachment is not good.

So far, there is no assembly system that can be used for seamless attachment and precise installation of the stator shielding sleeve of the nuclear main pump

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