Unlock instant, AI-driven research and patent intelligence for your innovation.

On-line cooling method for rolling bearings with grease aging and temperature rise in nuclear power plants

A rolling bearing and lubricating grease technology, applied in the field of a million kilowatt advanced pressurized water reactor nuclear power plant, can solve the problems of economic loss, waste of manpower and material resources, unplanned I0, etc., to reduce downtime loss, reduce consumption ratio, and reduce consumption ratio Effect

Inactive Publication Date: 2016-09-14
CHINA GENERAL NUCLEAR POWER CORP +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem of temperature rise in rolling bearings in the prior art, which requires shutting down for isolated maintenance, resulting in huge economic losses, waste of manpower and material resources, unplanned I0 and higher unit I0 consumption ratio. A method for online cooling of rolling bearings caused by grease aging and temperature rise in nuclear power plants, which can save time and have huge economic benefits without stopping the machine

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • On-line cooling method for rolling bearings with grease aging and temperature rise in nuclear power plants
  • On-line cooling method for rolling bearings with grease aging and temperature rise in nuclear power plants
  • On-line cooling method for rolling bearings with grease aging and temperature rise in nuclear power plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] A nuclear power plant online cooling method for rolling bearings with grease aging temperature rise, characterized in that it includes the following steps:

[0125] Such as figure 1 As shown, (1) It was found that L2RCV003MO (Lingao chemical and volume control system 003 motor) had high temperature during operation, and the temperature rise of the rolling bearing was detected, and the maximum temperature was determined to reach 87°C, which exceeded the warning value of 70°C. Then check the rolling bearings, first check the initial record of the amount of grease added during equipment maintenance, the historical account of equipment maintenance, and the summary of the amount of daily replenishment of grease; draw a conclusion: the equipment has been online for a long time, and the grease has aged and accumulated.

[0126] (2) Next, check the running state of the rolling bearing; checking the running state of the rolling bearing includes: detecting the vibration spectrum ...

Embodiment 2

[0131] D1RRA001PO (Pump 002 of Daya Bay Reactor Primary Circuit Safety Injection System) performs planned lubrication. After adding 15g of grease to the non-drive end bearing, the pump bearing temperature rises to a maximum of 85°C, exceeding the warning value of 70°C. After running for about 26 hours, it gradually fell back and remained at about 51°C. Then check the rolling bearings, first check the initial record of the amount of grease added during equipment maintenance, the historical account of equipment maintenance, and the summary of the amount of daily replenishment of grease; draw a conclusion: the equipment has been online for a long time, and the grease has aged and accumulated.

[0132] (2) Next, check the running state of the rolling bearing; checking the running state of the rolling bearing includes: detecting the vibration spectrum of the rolling bearing and the rotating sound of the rolling bearing. From the vibration spectrum, it can be concluded that the rolli...

Embodiment 3

[0135] (1) The lower bearing of D2SEC001PO (Pump 001 of Daya Bay Reactor Primary Circuit Safety Injection System) is lubricating and replenishing oil from the automatic oiler in the execution plan. At around 8:40 in the morning, it was found that the bearing temperature had an upward trend, and continuous observation found that the temperature rose rapidly. Then check the rolling bearings, first check the initial record of the amount of grease added during equipment maintenance, the historical account of equipment maintenance, and the summary of the amount of daily replenishment of grease; draw a conclusion: the equipment has been online for a long time, and the grease has aged and accumulated.

[0136] (2) Next, check the running state of the rolling bearing; checking the running state of the rolling bearing includes: detecting the vibration spectrum of the rolling bearing and the rotating sound of the rolling bearing. From the vibration spectrum, it can be concluded that the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for cooling a rolling bearing heated by ageing of lubricating grease on line of a nuclear power station. The method comprises the following steps: detecting and determining whether the temperature of the rolling bearing reaches or exceeds a pre-warning value; examining and discriminating that the temperature rise of the rolling bearing is caused by a lubricating grease problem; and rapidly adding the lubricating grease into a bearing chamber, purging the bearing chamber of the rolling bearing, detecting the temperature of the rolling bearing after the purging, if the temperature of the rolling bearing decreases to a normal value, stopping the adding of the lubricating grease and the purging, otherwise, adding the lubricating grease into the bearing chamber again, purging the bearing chamber of the rolling bearing again, and repeatedly carrying out the operations until the temperature of the rolling bearing decreases to the normal value. The method has the beneficial effects that the temperature rise of the rolling bearing caused by the ageing of the lubricating grease can be solved on line without halting, a lot of operation time is saved, and great economic benefits are achieved.

Description

technical field [0001] The invention belongs to the key technical field of a million-kilowatt advanced pressurized water reactor nuclear power plant, and relates to a processing method for a faulty bearing, in particular to an online cooling method for a nuclear power plant's rolling bearing with grease aging and temperature rise. Background technique [0002] Nuclear power plants and some large-scale enterprises all use important rotating equipment—large motors. For the sake of economy and convenient maintenance, rolling bearings are mostly used in the design for the support of the rotors of rotating equipment. Rolling bearings are often used in large motors, for example: A water pump driven by a 6.6KV motor with a rolling bearing structure. Compared with other bearings, rolling bearings are lubricated by grease. Compared with thin oil lubricated bearings, in actual operation, the temperature of rolling bearings will rise and fluctuate. In some cases, the temperature rise o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F16C37/00
Inventor 黎志政吴粉山刘军生蔡勇军章勇谢宝利古志强武宏亮李明李庆磊张春旺陈永军王克臻
Owner CHINA GENERAL NUCLEAR POWER CORP