Tilting Thrust Bearings Research Articles

Centrifugal Effect of Thrust Plate of Water-lubricated Thrust Bearing and its Influence Mode

Water-lubricated thrust bearing with water as the medium, is a mechanical transmission medium with energy saving and environmental protection. The thrust bearing with water medium can reduce the wear of bearing and the friction between gears. At the same time, the shape of the rolling bearing in the state of high-speed operation is bound to undergo a series of changes, and the radial working clearance is also slightly changed due to the centrifugal effect under high-speed operation, which has a certain degree of influence on the thrust disc. The shielded thrust disc avoids the problem of loose sealing, and the tilting thrust bearing has the advantages of obvious centrifugal effect, large rotating inertia of the thrust disc and large bearing size. In view of the characteristics of thrust bearing structure of water medium, this study established the coupling calculation model of the thrust plate after centrifugal denatination based on the finite element analysis method, and explored the design parameters of two key clearances in the assembly structure of the thrust plate. It is found in this paper that the tilting pad bearing under low speed steering will compensate for the deformation of the thrust disc, and when the rotating speed is greater than 3600r/min, the centrifugal deformation of the thrust disc will increase in morphology and even lead to lubrication failure. Therefore, the speed is an important factor that influences the centrifugal effect of the thrust disc and the bearing disc body enlargement.

A comparative experimental study on large size center and bi-directional offset spring-bed thrust bearing

The central support tilting thrust bearing is widely used in the motor-generator unit, and the central support tilting thrust bearing performs poorly compared with the offset bearing. In order to improve the performance of the thrust bearing capable of the bidirectional operation, a spring-supported switching tilting thrust bearing was designed, which could run under offset condition at both clockwise and counterclockwise. In order to verify the reliability of the bearing, we designed a true size thrust bearing test bench and measured the performance parameters of the temperature, pressure, oil film thickness, and power loss of the pad. This article introduces in detail the operation mechanism of the bidirectional offset spring-bed tilting thrust bearing. The bidirectional offset spring-bed tilting thrust bearing structure and the central support bearing structure were compared and tested. The test results of the performance difference of large tilting pad bearings with different structures were obtained. According to the experiment, the spring support structure has good adaptability, and the improved bidirectional offset support bearing not only has higher bearing capacity, but also has better performance in all aspects of temperature rise and loss than the central support bearing. The actual size experiment provides the experimental data for the theoretical calculation of large tilting pad bearings, providing a more accurate basis for the bearing performance and safety assessment.

Hydrodynamic Thrust Bearings: Theory and Experiment

In this paper results from experimental studies and computer simulation of hydro-dynamic tilting thrust bearings are presented. The bearing performance in terms of outlet film thickness, friction coefficient, and bearing temperature was measured in a high speed thrust bearing test rig. The numerical simulation involves the solution of the generalized Reynolds equation and the energy equation, which considers thermal effects on the oil viscosity and the squeezing of the oil film.

A Three-Dimensional oil film Temperature Distribution in Tilting Thrust Bearings

The oil film temperature and pressure distributions of the finite width Michell tilting thrust pad are determined from a numerical scheme based on the finite element method. These computed results correlate very well with those obtained from the experiment.