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Method and system for calculating running state of thrust bearing based on stress temperature of oil film

A thrust bearing and operating state technology, applied in calculation, computer-aided design, complex mathematical operations, etc., can solve problems limited to experimental research state

Pending Publication Date: 2021-10-22
DALIAN SANHUAN COMPOSITE MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although some research institutions use strain gauges to assist in the installation and adjustment of thrust pads, in the actual application process, they are often limited by the actual position and working conditions. This method is mostly limited to the state of experimental research, and an effective and practical Acceptance of the installation results of the thrust bearing bush by the monitoring and acceptance method

Method used

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  • Method and system for calculating running state of thrust bearing based on stress temperature of oil film
  • Method and system for calculating running state of thrust bearing based on stress temperature of oil film
  • Method and system for calculating running state of thrust bearing based on stress temperature of oil film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Example 1 Comparison and verification of the method of calculating the operating state of the thrust bearing pad by the temperature of the oil film force

[0063] 8 pieces / set of elastic metal plastic bearing bushes installed on the test bench, 245cm 2 / block, 1#~8# test tiles are installed with tile body temperature, oil film temperature and weighing sensor, 1#, 3#, 5#, 7# test tiles are installed with tile body oil inlet temperature sensor, according to "Thrust Bearing Installation Standard" Installation, acceptance. The line speed of the simulated power station unit is 12.6m / s, and the specific pressure is 3.92MPa. Adjust the cooling water flow and lubricating oil flow to control the oil inlet temperature to about 35°C, and load it step by step according to 10% of the full load. After each stage runs stably for 1 hour, record the parameters and calculate the single-watt force during operation. The comparison between the force ratio of the pad and the numerical rat...

Embodiment 2

[0146] Example 2 The simulated unit benchmarks and establishes standards, and establishes red, yellow, and green dynamic operation standards

[0147] 2.1 Babbitt test bearing bushes 6 pieces / set, 210cm 2 / block, rigid support, tile body temperature and oil film temperature are installed on 1#~6# test tiles, oil inlet temperature sensor is installed on 2#, 4#, 6# test tiles, and oil tank temperature sensor is installed in the middle of the oil tank. Installed in accordance with the "Thrust Bearing Installation Standard" and passed the acceptance inspection. Simulate the high-speed and heavy-load operating conditions of the hydropower unit, with a linear velocity of 26.8m / s and a specific pressure of 4.50MPa. Under full-load operating conditions, the cooling water flow and lubricating oil flow are controlled so that the oil tank temperature is 35°C, 40°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, record the parameters after 1 hour of stabilization.

[0148] Taking the force r...

Embodiment 3

[0159] Example 3 Based on the model analysis, the influence of the design of the high-pressure oil hole on the operating state of the elastic metal-plastic bearing

[0160] When using Babbitt alloy bearing pads for large units, the design of the high-pressure oil jacking device is used to lift the mirror plate during start-up and shutdown, so that an oil film is formed on the surface of the bearing pad to prevent semi-dry friction between the thrust bearing and the mirror plate. tile burning accidents. Some units still retain the tile surface design of the high-pressure oil jacking device after replacing the Babbitt tiles with elastic metal-plastic tiles. Because the elastic metal-plastic tiles have excellent friction reduction and self-lubricating properties, high-pressure oil jacking is not required. The influence of the pad surface with high-pressure oil holes on the state of the lubricating oil film during the operation of the bearing pad is a problem worth exploring. In ...

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Abstract

The invention provides a method and system for calculating the running state of a bearing based on the stress temperature of an oil film. The bush body oil inlet temperature sensor and / or the oil groove temperature sensor, the oil film temperature sensor and the bush body temperature sensor are installed on the thrust bush to obtain thrust bush data, a model is built through the obtained data, the running stress state of the bearing bush after installation can be checked, a dynamic running standard is established whether the unit is in safe operation or not can be judged, the stress condition and the operation state of thrust bearing operation can be monitored more scientifically, reliably and visually in real time, the blank of the thrust bearing bush operation stress monitoring technology is filled up, application software developed based on the method performs automatic diagnosis and analysis on the operation state of the unit according to an operation digital model. The model provides support for intelligent operation and maintenance and state maintenance of a unit, and is of great significance for building a bearing intelligent operation and maintenance service platform.

Description

technical field [0001] The invention relates to the field of bearing operation and maintenance, in particular to a method and system for calculating the operating state of a bearing based on the temperature of the oil film. Background technique [0002] Thrust bearings are used in many fields such as hydropower, wind power, nuclear power, industrial gearboxes and special industries. During the operation process, the thrust bearing is of great significance to the safety, stability and reliability of the unit operation, and its stress state directly affects whether the unit can operate safely. Therefore, the force on the bearing bush is one of the important indicators for diagnosing the operating state of the thrust bearing. , played a key role. [0003] At this stage, the stress state of thrust bearing pads has been one of the hot and difficult issues in the field of bearings for a long time, especially composite thrust bearings. The national standard GB / T8564-2003 "Technic...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/18G01D21/02G06F119/08G06F119/14
CPCG06F30/20G06F17/18G01D21/02G06F2119/08G06F2119/14G01M13/04
Inventor 魏柏林孙娜娜杨亮林茂双文宗宇彬巴金孙成玉
Owner DALIAN SANHUAN COMPOSITE MATERIAL TECH DEV