Auxiliary seal life verification testing machine for nuclear main pump shaft seal

Abstract

The invention discloses an auxiliary seal life verification testing machine for a nuclear main pump shaft seal. The machine comprises a vibration main unit which includes a connecting disc, an actuator, a force measurement sensor, a double-groove static ring seat and an insertion part, wherein the actuator and the force measurement sensor are installed on the connecting disc, the double-groove static ring seat is located above the force measurement sensor, and the insertion part is installed on an output shaft of the actuator, and the double-groove static ring seat is provided with three ringgrooves. A middle annular groove is connected with a circulating water inlet pipe and a circulating water outlet pipe, the upper annular groove and the lower annular groove accommodate two groups of groove-shaped seals of a contrast test, each groove-shaped seal comprises an O ring and an O ring supporting ring, the O ring supporting rings abut against the outer cylindrical surface of the insertion part under the action of circulating water pressure, and the inserting part is driven by the actuator to reciprocate and rub with the two O ring supporting rings. The force measurement sensor measures a total friction force. An actuator oil source is used for providing a hydraulic medium for the reciprocating motion of the actuator; a water pressurizing and circulating system is used for continuously supplying high-pressure deionized water to the double-groove static ring seat; and a monitoring system is used for detecting vibration related parameters and controlling normal operation of theequipment.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and more specifically, the invention relates to a secondary seal life verification tester for a nuclear main pump shaft seal. Background technique [0002] The reactor coolant pump (hereinafter referred to as "the main pump") is the key equipment of the primary circuit system of the nuclear power plant. The shaft seal has a crucial influence on the reliability of the reactor coolant pump. The reliability of the shaft seal directly affects the main pump and the nuclear power plant. operability. [0003] Part of the main pump shaft seal adopts a hydrostatic shaft seal assembly, which is a part of the pressure boundary of the primary circuit. Its main function is to prevent the coolant from leaking into the reactor building along the pump shaft under normal operating conditions and design basis accident conditions. The shaft seal of the main pump is a multi-stage series non-contact mechanical...

AI Technical Summary

Problems solved by technology

At present, the existing reciprocating friction and wear testing machine adopts the cam spring mechanism, the working frequency does not exceed 10 Hz, lacks the evaluation function of the friction state, and cannot meet the requirements of the accelerated wear test of the seal

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