All-around lubricating film pressure wireless monitoring method of liquid sliding bearing

Abstract

The invention discloses a method for measuring the pressure of a lubricating liquid film of a liquid sliding bearing to achieve the real-time measurement of the all-around lubricating liquid film pressure of a liquid sliding journal bearing and a thrust bearing with different rotation speeds. A pressure sensor is mounted on a revolving shaft by different methods according to different shaft diameters; the sensor is connected with a wireless emission device mounted in the shaft or on the tail end of the shaft; the wireless emission device transmits the liquid film pressure signal of the bearing to the outside of a bearing rotor system while rotating together with the shaft; an external wireless receiving device receives the pressure signals so as to monitor the pressure distribution characteristics and the lubrication state of the lubricating film of the bearing in real time.

Description

Technical field: [0001] The invention belongs to the field of operating state monitoring and fault diagnosis of industrial equipment, and relates to the monitoring of the operating state of sliding bearings lubricated by liquids such as oil or water, a lubricating film pressure test method and a wireless transmission technology of test data. Background technique: [0002] With the continuous development of science and technology, all kinds of mechanical equipment are developing in the direction of high speed, automation and higher complexity, which provides the basis for the convenience of human life and the industrialization of social production. But at the same time, failures or failures in the operation of mechanical equipment will not only cause economic losses, but may also lead to catastrophic casualties and adverse social impacts. Therefore, the development of mechanical equipment operation status monitoring technology is the same as the development of mechanical equip...

AI Technical Summary

Problems solved by technology

It is relatively simple and convenient to measure the lubricating film pressure from the bearing shell with a pressure gauge or a pressure sensor, but there is a big disadvantage, because the measuring points on the bearing shell cannot be many and dense, so this method can only measure limited points The oil film pressure at the center of the bearing cannot be measured, and the continuous distribution of the liquid film pressure in the bearing can not be measured; secondly, if too many measuring points are distributed, it will destroy the lubrication state of the working surface of the bearing itself, resulting in too large measurement error, which is harmful to the machine. Not ideal for rational experiments

[0007] Another method is to drill a hole on the shaft and install the pressure sensor in the rotary shaft for measurement, so that the pressure sensor can measure the pressure distribution on the section where the shaft is rotating, and the liquid film pressure is installed in the main shaft In this method, the interference signal generated by the contact of the collector ring itself interferes too much with the pressure signal of the sensor, and the signal accuracy is lost. Large, and the dynamic balance and reliability problems of the collector ring itself in the high-speed rotation of the bearing, as well as the type limitation and high cost of the collector ring product itself limit the application of this method, which is the shortcoming of this method

Images