A dynamic and static pressure thrust bearing jointly carried by a tilting pad and a static pressure oil chamber

Abstract

The invention discloses a hybrid thrust bearing with tilt pads and a static pressure oil cavity combined for bearing. The hybrid thrust bearing comprises a rotary shaft, and the rotary shaft is sleeved with a cover plate. The rotary shaft is connected with a runner plate coaxial with the rotary shaft, and the cover plate covers a shell. The runner plate is located in a cavity of the shell, and a static pressure oil cavity a and a pad groove a are formed in the end face of the side, buckled with the shell, of the cover plate. The tilt pad a is arranged in the pad groove a, and a circumferentialoil return groove a and an annular oil return groove a are formed in the cover plate. A static pressure oil cavity b and a pad groove b are formed in the end face of the side, buckled with the coverplate, of the shell. The tilt pad b is arranged in the pad groove b, and a circumferential oil return groove b and an annular oil return groove b are formed in the shell. According to the hybrid thrust bearing the corresponding tilt pads and static oil cavities are relatively independent, so that a static pressure oil film and a dynamic pressure oil film are completely decoupled; and therefore static and dynamic pressure combined bearing is achieved. The proportion of static pressure bearing and dynamic pressure bearing can be adjusted arbitrarily, and therefore good bearing performance and lubricating performance are achieved.

Description

technical field [0001] The invention belongs to the technical field of sliding bearings, and relates to a dynamic and static pressure thrust bearing jointly carried by a tilting pad and a static pressure oil chamber. Background technique [0002] Thrust sliding bearings are widely used in large-scale mechanical equipment such as power stations, chemical industry, and metallurgy. As key components in equipment, their performance will directly affect the full performance of the overall performance of the machine. With the rapid progress of industrial machinery, the speed and load borne by the machine have increased accordingly. High-speed and heavy-load conditions have become more common, and there are higher requirements for the performance of sliding bearings. [0003] The types of radial sliding bearings currently used in engineering are mainly fixed pad bearings and tilting pad bearings. Among them, fixed pad bearings are generally divided into round bearings, elliptical ...

AI Technical Summary

Problems solved by technology

Fixed pad bearings are widely used due to their simple structure, large load capacity and easy processing, but the commonly used fixed pad sliding bearings have poor dynamic stability and low rigidity.

Although the tilting pad sliding bearing generally has good dynamic stability, its structure is complex and its load capacity is relatively low.

Dynamic and static pressure lubricated bearings have the advantages of large load capacity, good anti-vibration performance, high limit speed, and long life. However, there is coupling between the dynamic pressure oil film and the static pressure oil film of this type of structure, and the performance is not easy to control and is prone to instability.

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