Bearing for main feed water pump

Abstract

The invention discloses a bearing for a main feed water pump. The bearing comprises an oil retaining disc, a thrust disc, an axial displacement measuring disc and a bearing block; the oil retaining disc is sleeved on a pump shaft, and the bearing block is sleeved on the radial outer side of the oil retaining disc, the radial outer side of the thrust disc and the radial outer side of the axial displacement measuring disc; a front thrust pad seat and a rear thrust pad seat are fixed onto the inner circumference of the bearing block and are symmetrically arranged on the front side and the rear side of the thrust disc; a plurality of front thrust pads which are uniformly distributed around the pump shaft are arranged between the front thrust pad seat and the front end surface of the thrust disc; and a plurality of rear thrust pads which are uniformly distributed around the pump shaft are arranged between the rear thrust pad seat and the rear end surface of the thrust disc. The bearing has the technical advantages that axial force on the pump shaft is balanced under a synergetic effect of the front thrust pads, the thrust disc and the rear thrust pads when the main feed water pump runs, the pump shaft is prevented from being damaged during running, and the safety running of the main feed water pump is guaranteed.

Description

technical field [0001] The invention relates to a bearing used for a main feed water pump in the field of nuclear power equipment. Background technique [0002] The main feed water pump is a non-nuclear grade pump. The main function of the main feed water pump in the pressurized water reactor nuclear power plant is to pressurize the incoming water of the deaerator, and then the incoming water of the deaerator enters the high pressure heater and steam generator. Make the steam generator generate steam to drive the main steam turbine of the nuclear power plant to generate electricity. During the period when the primary loop reactor is shut down, the excess heat in the reactor can also cause the feed water of the main feed water pump to generate steam, export the heat of the primary loop medium, and play the role of cooling the primary loop. Furthermore, when the main steam turbine suddenly loses load or the steam pipeline ruptures and other accident conditions, the main feed ...

AI Technical Summary

Problems solved by technology

[0003] During the operation of the main feed water pump, the pump shaft of the main feed water pump is subjected to a large axial force. The current main feed water pump relies on the balance drum on the pump shaft to balance the axial force on the pump shaft, but This is not enough to balance the axial force on the pump shaft, and the pump shaft is still in great danger of being damaged by the axial force, endangering the safe operation of the main feed water pump

Therefore, those skilled in the art hope that the bearing on the main feed water pump can balance the axial force suffered by the pump shaft when the pump shaft is supported, but there is no relevant report yet

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