Real-time measuring device and method capable of measuring dynamic oil membrane pressure distribution and temperature of tilting-pad sliding bearings

Abstract

The invention relates to the technical field of pressure and temperature measuring of an oil membrane, in particularly to a real-time measuring device and method capable of measuring dynamic oil membrane pressure distribution and temperature of tilting-pad sliding bearingd. The real-time measuring device comprises a motor, a transmission wheel, a spindle, a key phase wheel, a turntable, a bearing base, a base and an oil supplying device. A plurality of pressure sensors and temperature sensors and at least two tilting-pad sliding bearings are manufactured during measuring, the pressure sensors and the temperature sensors are used for converting oil membrane pressure and temperature into electrical signals and outputting the electrical signals, and by combining the parabola theory of oil membrane force, the discrete pressure signals output by the pressure sensor are interpolated into oil membrane pressure distribution on a whole bearing bush, and the circumferential temperature distribution of different points of the shaft bush can be obtained. The real-time measuring device and method have the advantages of being capable of accurately and reliably measuring distribution of the oil membrane pressure and the temperature so as to provide accurate experiment data for the following oil membrane force, oil membrane dynamic characteristics and non-linear correlational reaches.

Description

[technical field] [0001] The invention relates to the technical field of oil film pressure and temperature measurement of sliding bearings, in particular to a real-time measuring device and method for dynamic oil film pressure distribution and temperature of tilting pad sliding bearings. [Background technique] [0002] Tilting pad radial sliding bearings have many advantages such as good running stability, low noise, and small radial size, so they are widely used in high-speed rotating machines. The tilting pad sliding bearing is used in high-speed rotating machinery, and its dynamic characteristics have a very significant impact on the overall dynamic characteristics of high-speed rotating machinery. Due to the complexity of the structure of the tilting pad sliding bearing and the hydrodynamic lubrication, the oil film has strong nonlinear characteristics, and it is still impossible to predict it accurately. One of the difficulties. In addition, the bearing pad of the til...

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Problems solved by technology

[0003] Therefore, the traditional measurement method has the following deficiencies: On the one hand, since the oil film pressure is mostly obtained by theoretical calculation and indirect measurement, and the bearing pad of the tilting pad sliding bearing is thin and small, it keeps swinging during work, so the traditional fixed bearing pad The measurement method of the oil film pressure is not easy to apply to the tilting pad sliding bearing; on the other hand, the flow, boundary and pressure distribution of the oil film itself in the actual work of the tilting pad sliding bearing are different from ordinary fixed pad bearings, and the tilting pad sliding There are oil film pressure and temperature changes on each bearing pad of the bearing, so the traditional measurement method cannot obtain the accurate value of the oil film pressure in real time

[0004] Since the nonlinear vibration and instability problems induced by high-speed tilting pad sliding bearings have not been well resolved, it has seriously restricted the development level of key rotating machinery for civil and national defense, such as engines, steam turbines, and gas turbines.

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