Tilting bush thrust bearing with complex slip surface

A thrust bearing and sliding technology, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of tilting pad thrust bearing failure, not paying attention to pressure center offset, and inability to use tilting pad thrust bearings, etc. Achieve the effect of avoiding failure, high bearing capacity and low friction torque

Active Publication Date: 2017-05-31
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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, bearing

Method used

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  • Tilting bush thrust bearing with complex slip surface
  • Tilting bush thrust bearing with complex slip surface
  • Tilting bush thrust bearing with complex slip surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The thrust bearing optimized in this example has an outer diameter of 800 mm, an inner diameter of 400 mm, a wrap angle of 40°, a radial branching coefficient of 0.524, a circumferential branching coefficient of 0.609, a normal working speed of 1500 rpm, and an average working pressure of 0.544 MPa.

[0022] like figure 1 As shown in , the upper surface of the tile is divided into two regions: region I near the entrance region and the remaining region II, where region I is treated as a hydrophobic surface, which has a lower ultimate shear stress and is prone to interface Slip; area II is surface-treated as a hydrophilic surface, which has a higher ultimate shear stress and is less prone to interfacial slip.

[0023] like figure 2 As shown, the height of region I is lower than that of region II. In this embodiment, the height of region I is 40 μm lower than that of region II, so as to protect the hydrophobic surface in region I from abrasion caused by the start and st...

Embodiment 2

[0028] The outer diameter of the optimized thrust bearing in this example is 800 mm, the inner diameter is 400 mm, the wrap angle is 40°, the radial branching coefficient is 0.524, the circumferential branching coefficient is 0.5, and the pads are pre-processed with 25 μm arc convex The normal working speed is 1500rpm, and the average working pressure is 0.544MPa.

[0029] like figure 1 As shown in , the upper surface of the tile is divided into two regions: region I near the entrance region and the remaining region II, where region I is treated as a hydrophobic surface, which has a lower ultimate shear stress and is prone to interface Slip; area II is surface-treated as a hydrophilic surface, which has a higher ultimate shear stress and is less prone to interfacial slip.

[0030] like figure 2 As shown, the height of region I is lower than that of region II. In this embodiment, the height of region I is 40 μm lower than that of region II, so as to protect the hydrophobic s...

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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...

Claims

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Application Information

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IPC IPC(8): F16C33/04
CPCF16C33/04
Inventor 刘莹宋智翔郭飞刘向锋王玉明
Owner TSINGHUA UNIV
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