Tilting bush thrust bearing with complex slip surface

Abstract

The invention provides a tilting bush thrust bearing with a complex slip surface. The tilting bush thrust bearing comprises multiple bushes; the upper surface of each bush is divided into two areas: an area I near an inlet area and a rest area II, wherein the surface treatment is performed for the area I to form a hydrophobic surface so as to achieve lower limit shearing stress and to be liable to generate the interface slip; the surface treatment is performed for the area II to form a hydrophilic surface so as to achieve higher limit shearing stress and to be not liable to generate the interface slip; after the pressure center change caused by the interface effect and the tilting characteristics of the bushes are considered, the radial and peripheral distribution ranges of the area I are optimally obtained; after a lubricating medium flows from the area I to the area II, as the medium flowing continuity can generate additional pressure peak, the bearing capacity of the tilting bush thrust bearing is improved; as the fluid shearing viscosity in the area I is reduced, the friction torque of the tilting bush thrust bearing is reduced; and the step design in different areas solves the problem of no wear resistance of hydrophobic components in the area I.

Description

technical field [0001] The invention belongs to the technical field of bearings, in particular to a tilting pad thrust bearing with complex sliding surfaces. Background technique [0002] Thrust bearings are the foundation and key components of mechanical systems, and their performance directly determines the life and reliability of the entire mechanical system. With the gradual promotion of water medium lubrication, large-size water-lubricated bearings have the characteristics of small film thickness and high linear velocity, and the corresponding shear rate is so large that it may occur between the solid-liquid interface, especially on the hydrophobic surface. Interface slippage. [0003] In previous studies on interface slip, Spikes first applied interface slip in thrust sliding bearings to reduce the friction torque of bearings. Later, some scholars applied interface slip to concentric-to-central sliding bearings and parallel plate thrust In bearings, the frictional to...

AI Technical Summary

Problems solved by technology

[0004] Among the currently authorized and published patents, the patent "Thrust Bearing Using Interface Slip Technology" (application number: 200810025059.0 announcement number CN100545469C) discloses a new type of thrust bearing composed of parallel flat plates that uses the interface slip characteristics to realize It has good anti-friction and wear-resistant properties while maintaining a certain load-carrying capacity; the patent "Concentric-to-Central Sliding Bearing Formed Using Interface Slip" (application number: 201510203567.3 announcement number CN104791381A) discloses a concentric sliding bearing using interface slip characteristics. Radial bearings, bearings have a certain load-carrying capacity and anti-friction characteristics; however, the bearing design formed by the use of interface slip published above only focuses on the reduction of load-carrying capacity and friction after the use of interface slip, but does not pay attention to the reduction caused by the interface slip. The pressure center offset caused by slippage, so this design cannot be applied to the tilting pad thrust bearing, the same design parameters may cause the failure of the tilting pad thrust bearing

[0005] Due to the above deficiencies in the prior art, there is currently no complex interfacial sliding bearing design for tilting pad thrust bearings

Images