Non-active pressure-boosting pressure-stabilizing system capable of alleviating cavitation abrasion of water lubricated main-pump bearing

A passive, water-lubricated technology, applied to bearing components, shafts and bearings, bearing assembly, etc., can solve problems that have not been reported, and achieve the effect of simple and reasonable process, alleviating cavitation wear, and less control parameters

Active Publication Date: 2014-04-16
NUCLEAR POWER INSTITUTE OF CHINA
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  • Non-active pressure-boosting pressure-stabilizing system capable of alleviating cavitation abrasion of water lubricated main-pump bearing
  • Non-active pressure-boosting pressure-stabilizing system capable of alleviating cavitation abrasion of water lubricated main-pump bearing

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 As shown, before the modification of the present invention, the desalted water in the desalted water purification system 1 is driven by the LCU pump 2 to reach the main pump head box 22 at a height of 47m through a series of valves and pipelines, and the 47m of the main pump head box 22 The height provides a certain static pressure source for the main pump bearing chamber 23 . The main pump head box 22 directly communicates with the atmosphere 24 through the exhaust pipeline, and is connected to the sump 16 through the normally open overflow pipeline. On the replenishment pipeline of the main pump head box 22, a manual cut-off valve A3 for cutting off the replenishment water, a manual adjustment valve 5 for regulating the replenishment water flow, and an electric cut-off valve A4 connected in parallel with the manual ...

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Abstract

The invention relates to a non-active pressure-boosting pressure-stabilizing system capable of alleviating cavitation abrasion of a water lubricated main-pump bearing. According to the system, a conventional openmouthed main pump head box is changed into a sealed head box, also two electric stop valves are additionally installed on an exhaust overflow pipe, and an exhaust valve is additionally installed at the upper part of the head box. Because of a pressure stabilizing system consisting of a throttling member, an inverted valve and a pressure-stabilizing tank, the influence of pressure fluctuation of a desalted water supply system to the head box is buffered; an inflation system of the pressure-stabilizing tank is formed by utilizing a conventional nitrogen low-pressure system and additionally installing a manual stop valve used for adjusting nitrogen pressure and a manual stop valve used for closing and stopping nitrogen supply; by opening the electric stop valve in parallel connection with the inverted valve and opening the exhaust valve at the exhaust overflow pipe of the main pump head box and closing the electric stop valve at the inlet pipe of the pressure-stabilizing tank, the connection between changed return part and the original system is rapidly cut off; and by opening the manual stop valve used for closing and stopping nitrogen supply and at an air inflation pipe of the pressure-stabilizing tank, air can be supplied when a reactor is operated.

Description

technical field [0001] The invention relates to a passive pressurization and pressure stabilization system capable of alleviating cavitation wear of water-lubricated main pump bearings, in particular to building the main pump head by using the desalted water supply system and the nitrogen supply system in the containment under the condition of the reactor containment The tank provides a stable pressure source to increase the static pressure of the main pump bearing chamber. Background technique [0002] The Tianwan Nuclear Power Plant adopts the Russian VVER reactor type, and its main pump uses water as the lubricant of the bearing. The main pump bearing with water as the lubricant has many advantages such as high economy, no fire hazard, easy maintenance, and simplified system. It also brings corresponding technical problems. After the main pump of Tianwan Nuclear Power Plant has been running for a period of time, the maintenance personnel found that there are some uneven ...

Claims

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Application Information

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IPC IPC(8): F16C41/00
Inventor 曾小康昝元峰张震熊万玉王涛
Owner NUCLEAR POWER INSTITUTE OF CHINA
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