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Surface texture design method with controllable anti-climbing ability

A technology of surface texture and design method, which is applied in the field of lubrication system, can solve the problems that cannot be completely suppressed, and achieve the effect of solving the creeping loss of lubricating oil

Active Publication Date: 2020-10-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The essence is passive protection, which slows down the creeping that has occurred, but cannot completely suppress it.

Method used

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  • Surface texture design method with controllable anti-climbing ability
  • Surface texture design method with controllable anti-climbing ability
  • Surface texture design method with controllable anti-climbing ability

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] A kind of specific implementation steps of the present invention are as follows:

[0016] 1. Use infrared thermal imaging camera to accurately identify the temperature distribution on the surface of the friction pair. Take two typical forms of temperature gradient as examples: ① unidirectional temperature gradient, that is, one end of the friction pair is a high-temperature area, and the other end is a low-temperature area, and a single-directional temperature gradient formed between the high and low temperature areas; ② Omnidirectional temperature gradient, that is, There is a high temperature zone in the middle of the friction pair, and a low temperature zone around it, forming an omnidirectional temperature gradient between the center and the surroundings. figure 1 Shown are temperature profiles of the above two types captured by a t...

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Abstract

The invention provides a surface texture design method with controllable anti-creeping ability. The method adopt a micro processing technology, surface textures of different scales are prepared on thesurface of the solid, gradient characteristics of parameters of the surface textures such as geometrical shape, feature size (width and depth) and arrangement form are designed, the flow direction guiding and positioning of the lubricating oil are realized; on the basis, micro-structures with different blocking characteristics are organically combined, and the surface textures with controllable anti-climbing ability is constructed. According to the surface texture design method, the creep generation stage is effectively slowed down and inhibited in the creep generation stage; in the stable spreading stage, lubricating oil to be lost is guided back and gathered to the target area, active / passive regulation of the creep of the lubricating oil is realized, the problem of lubricating oil creep loss under the action of temperature gradient is fundamentally solved, and provides a guarantee for long-lasting fixed-area lubrication under extreme working conditions.

Description

technical field [0001] The invention relates to the field of lubrication systems, in particular to a surface texture design method with controllable anti-climbing ability, which can be used in the design of lubrication systems in special working conditions in the aerospace field. Background technique [0002] When liquid lubricating oil infiltrates a solid surface with uneven temperature, it will flow slowly from the high temperature area to the low temperature area. This phenomenon of directional expansion without external force is heat-driven creeping. With the rapid development of aerospace technology, the problem of lubrication loss caused by creep has become particularly prominent. [0003] In the field of aerospace, NASA's research report (Fusaro RL. Preventing Spacecraft Failures Due to Tribological Problems. NASA / TM-2001-210806.2001) clearly pointed out that creep loss of lubricating oil is one of the main reasons for the loss of lubricating ability of space agencie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16N1/00
CPCF16N1/00
Inventor 戴庆文纪亚娟黄巍王晓雷
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS