CN109990196B - Adaptive surface texture for friction pairs - Google Patents
Adaptive surface texture for friction pairs Download PDFInfo
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- CN109990196B CN109990196B CN201910237178.0A CN201910237178A CN109990196B CN 109990196 B CN109990196 B CN 109990196B CN 201910237178 A CN201910237178 A CN 201910237178A CN 109990196 B CN109990196 B CN 109990196B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S5/00—Other constructional members not restricted to an application fully provided for in a single class
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Abstract
The invention discloses a self-adaptive surface texture for a friction pair, which comprises a friction pair body and a texture covering layer, wherein the surface of the friction pair body is processed with a micro-texture characteristic shape, and the texture covering layer is arranged on the surface of the friction pair body and is tightly contacted with the micro-texture characteristic shape. The surface texture can change the texture parameters of the engineering friction pair according to the working conditions of the engineering friction pair, so that the engineering friction pair is always in the optimal working range, and the friction pair is ensured to have good tribological performance under different working conditions.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a self-adaptive surface texture for a friction pair.
Background
In mechanical systems, the friction, wear and lubrication performance between the friction pairs moving relative to each other has a direct influence on the performance, efficiency and service life of the mechanical system. Statistically, about 30-50% of the energy used in the world is consumed by friction, and the wear caused by friction is the main cause of failure of mechanical equipment. A series of tribology theory and experimental research results show that: proper surface texture (surface microfeatures) can improve lubrication during rubbing. Surface texture has received continuous attention from researchers as an important means of improving lubrication and reducing friction.
The surface texture is that a microgeometric feature array with a certain size and arrangement is processed on a friction surface by using a specific processing method, and the shape of the surface texture is more in variety and mainly comprises shapes of pits, grooves and the like. Common machining methods include micro-machining, grinding, abrasive jet machining, laser machining, electric discharge machining, LIGA technology, UV lithography technology, reactive ion etching, ultrasonic machining, surface shot peening, and surface embossing technology, among which laser machining, electric discharge machining, electrolytic machining, and LIGA technology are most commonly used.
In fact, not all surface textures are effective in reducing friction, and only a reasonable surface texture design can achieve the desired effect. The design of a specific surface texture aiming at a specific working condition can reduce energy loss and prolong the service life of a friction pair, and has important significance for saving energy, protecting environment and promoting ecological balance. However, in practical applications, the engineered friction pairs are often in different lubrication states, and the surface texture features designed for one lubrication state may greatly degrade the tribological performance if the engineered friction pairs are operated in other lubrication states.
The traditional surface texture technology is micro texture which is artificially distributed at the surface processing position of a friction pair according to a certain rule by a physical, chemical or mechanical method. The microtexture has fixed geometrical characteristics, and only enables the engineering friction pair to obtain the optimal working performance under a certain working condition. However, the engineering friction pair is often in variable working conditions, and the microtexture with fixed geometric characteristics cannot ensure that the engineering friction pair can always obtain better tribological performance under various working conditions.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-adaptive surface texture for a friction pair, which can change texture parameters according to working conditions of an engineering friction pair, so that the engineering friction pair is always in an optimal working range, and the friction pair is ensured to have good tribological performance under different working conditions.
In order to solve the technical problem, the self-adaptive surface texture for the friction pair comprises a friction pair body, a texture covering layer and a texture coating layer, wherein the surface of the friction pair body is processed with a micro-texture characteristic shape, and the texture covering layer is arranged on the surface of the friction pair body and is in close contact with the micro-texture characteristic shape.
Further, the microtextured features comprise pits or grooves, and are machined on the surface of the rubbing counterpart body by using a honing technology, a laser surface texturing machining technology, a reactive ion etching technology, an embossing technology, a surface shot blasting technology, an ultrasonic impact machining technology or a photoetching micro-electrolysis machining technology.
Further, the texture covering layer is processed in the micro texture characteristic shape on the surface of the friction copy body by adopting a spraying process, and the friction coefficient and the elastic modulus of the texture covering layer are smaller than those of the friction pair body.
Further, the texture covering layer is formed by micro pits which are arranged on the surface of the friction copy body in an array mode.
The self-adaptive surface texture for the friction pair adopts the technical scheme, namely the surface texture comprises a friction pair body, the surface of the friction pair body is processed with a micro-texture characteristic shape, and the surface texture also comprises a texture covering layer, and the texture covering layer is arranged on the surface of the friction pair body and is tightly contacted with the micro-texture characteristic shape. The surface texture can change the texture parameters of the engineering friction pair according to the working conditions of the engineering friction pair, so that the engineering friction pair is always in the optimal working range, and the friction pair is ensured to have good tribological performance under different working conditions.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic diagram of the adaptive surface texture for a friction pair according to the present invention;
fig. 2 is a schematic diagram of the deformation of the surface texture after the friction pair in the surface texture is loaded.
Detailed Description
The embodiment is shown in fig. 1, the adaptive surface texture for the friction pair comprises a friction pair body 1, a micro-texture characteristic shape 11 machined on the surface of the friction pair body 1, and a texture covering layer 2, wherein the texture covering layer 2 is arranged on the surface of the friction pair body 1 and is in close contact with the micro-texture characteristic shape 11.
Preferably, the microtextured features 11 include pits or grooves, and are processed on the surface of the friction pair body 1 by using a honing technology, a laser surface texturing processing technology, a reactive ion etching technology, an embossing technology, a surface peening technology, an ultrasonic impact processing technology or a photoetching micro-electrolysis processing technology.
Preferably, the texture covering layer 2 is processed in the micro texture characteristic shape 11 on the surface of the friction pair body 1 by adopting a spraying process, and the friction coefficient and the elastic modulus of the texture covering layer 2 are smaller than those of the friction pair body 1.
Preferably, the texture covering layer 2 is micro pits arranged on the surface of the friction pair body 1 in an array.
As shown in fig. 2, the self-adaptive surface texture adopts the texture covering layer 2 with a lower friction coefficient and a lower elastic modulus to cover in the micro-texture characteristic shape 11 of the friction pair body 1, and when the friction pair is in a light-load working condition, the texture covering layer 2 only generates smaller elastic deformation 13, so that the surface of the friction pair body 1 has a micro-texture characteristic with a smaller depth; when the friction pair is in a medium/heavy load working condition, the texture covering layer 2 generates larger elastic deformation 13, so that the surface of the friction pair body 1 has a micro texture characteristic with larger depth. When the elastic modulus and the friction coefficient of the material of the texture covering layer 2 are properly selected, the friction pair with the self-adaptive texture surface can be suitable for various working conditions, the texture covering layer 2 elastically deforms under the condition of stress, and the geometric parameters of the texture characteristics are changed, so that the good friction reducing effect can be obtained under various working conditions, the performance and the efficiency of the friction pair are improved, and the service life of the friction pair is prolonged.
The geometric parameters of the self-adaptive surface texture are not fixed and change along with the change of the working conditions of the friction pair, so that the self-adaptive surface texture friction pair has a self-adaptive effect, and the friction pair with the self-adaptive surface texture has good tribological performance under different working conditions.
Claims (3)
1. An adaptive surface texture for a friction pair, which comprises a friction pair body, wherein the surface of the friction pair body is processed with a micro texture characteristic shape, and the adaptive surface texture is characterized in that: the friction pair is arranged on the surface of the friction copy body, and the texture covering layer is arranged on the surface of the friction pair and is in close contact with the micro texture characteristic shape; when the friction pair is in a medium/heavy load working condition, the texture covering layer generates larger elastic deformation, so that the surface of the friction copy body has micro texture features with larger depth, the micro texture features are in the shape of micro pits arrayed on the surface of the friction copy body, and when the friction pair body is not loaded, the upper surface of the texture covering layer is flush with the part, which is not provided with the micro texture feature shape, of the friction pair body.
2. The adaptive surface texture for friction pairs according to claim 1, characterized by: the micro-texture characteristic shape comprises a groove and is processed on the surface of the friction copy body by adopting a honing technology, a laser surface texturing processing technology, a reactive ion etching technology, an embossing technology, a surface shot blasting processing technology, an ultrasonic impact processing technology or a photoetching micro-electrolysis processing technology.
3. The adaptive surface texture for friction pairs according to claim 1 or 2, characterized in that: the texture covering layer is processed in a micro texture characteristic shape on the surface of the friction copy body by adopting a spraying process, and the friction coefficient and the elastic modulus of the texture covering layer are smaller than those of the friction pair body.
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| CN112376030B (en) * | 2020-11-27 | 2021-07-23 | 中国科学院兰州化学物理研究所 | Method for modifying polyimide surface by injecting metal ions into laser-textured circular pit array |
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| JP4306241B2 (en) * | 2002-12-12 | 2009-07-29 | オイレス工業株式会社 | SLIP MEMBER, METHOD FOR PRODUCING THE SLIP MEMBER, AND SLIP SEISMIC ISOLATION DEVICE USING THE SLIP MEMBER |
| JP4627713B2 (en) * | 2005-11-14 | 2011-02-09 | 日立建機株式会社 | Sliding member and manufacturing method thereof |
| CN105782243B (en) * | 2016-03-15 | 2018-12-14 | 江苏大学 | A kind of micro- texture surface solid lubrication processing method of secondary laser of friction |
| CN106090001B (en) * | 2016-06-06 | 2019-05-31 | 江苏大学 | A kind of multiple elements design texture guiding sliding friction pair, processing method and application thereof |
| CN107013565B (en) * | 2017-04-17 | 2023-03-31 | 哈尔滨电气动力装备有限公司 | Net-shaped elastic self-adaptive surface lubricating texture |
| CN108374841B (en) * | 2018-04-25 | 2020-05-05 | 宁波大学 | Dry friction self-lubricating sliding bearing with composite texture and manufacturing method |
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