CN114542937A - Self-adaptive lubricating superstructure based on negative Poisson ratio substrate - Google Patents
Self-adaptive lubricating superstructure based on negative Poisson ratio substrate Download PDFInfo
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- CN114542937A CN114542937A CN202210153401.5A CN202210153401A CN114542937A CN 114542937 A CN114542937 A CN 114542937A CN 202210153401 A CN202210153401 A CN 202210153401A CN 114542937 A CN114542937 A CN 114542937A
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- negative poisson
- lubricating
- ratio substrate
- lattice structure
- poisson ratio
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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
- F16N—LUBRICATING
- F16N15/00—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
A self-adaptive lubricating superstructure based on a negative Poisson ratio substrate comprises a multi-layer negative Poisson ratio substrate lattice structure in contact with a load, wherein lubricating particles are introduced into each layer of the negative Poisson ratio substrate lattice structure through an auxetic effect; according to the shape and the actual motion condition of a load, the artificial coding and the dynamic control of the local lubricating effect are realized by the multi-level negative Poisson ratio substrate lattice structures in different areas; during lubrication, a load acts on the negative poisson ratio substrate lattice structure, and the negative poisson ratio substrate lattice structure can drive lubricating particles to converge towards a compression point, so that the lubricating effect of the compression point is enhanced; selecting a 3D printing manufacturing process according to actual requirements, carrying out integrated rapid manufacturing on a negative Poisson ratio substrate lattice structure and lubricating particles, and adopting a photocuring (VPP), powder bed melting (PBF) or material extrusion Molding (MD) process; the invention can maximize the effect of the lubricating particles and lay a foundation for the self-adaptive dynamic control of surface lubrication.
Description
Technical Field
The invention belongs to the technical field of mechanical lubrication, and particularly relates to a self-adaptive lubricating superstructure based on a negative Poisson ratio structure.
Background
Compared with the traditional lubricating oil, the lubricating effect can be greatly improved by adding the specific lubricating material. For example, the added nano lubricating particles can play the role of balls when the friction surface bears load, so that the sliding friction between friction pairs is changed into rolling friction, and the performances of wear resistance, friction reduction and pressure resistance of the lubricating oil are improved.
Generally, the lubricating particles are uniformly distributed on the surface of the substrate, the conventional lubricating substrate is mostly made of a conventional material with a positive poisson ratio, the size of the conventional lubricating substrate in the vertical stress direction is reduced when the material is stretched, and on the contrary, when the conventional substrate with the positive poisson ratio is extruded, the substrate material is diffused to the periphery, so that the lubricating particles which are uniformly distributed originally are driven to be far away from a contact point, and the lubricating effect near the pressed point is reduced. Especially when the pressure conditions of the friction surfaces are dynamically changing, resulting in the actual lubrication effect often being lower than expected. In order to overcome the defect, the internal structure of the base material needs to be reasonably adjusted, so that the material distribution at the contact point can be automatically adjusted when the base material is compressed, and the method is one of the feasible schemes for improving the surface lubricating effect under the dynamic load.
In recent years, the Negative Poisson's Ratio (Negative Poisson's Ratio) has received much attention from the academic community, which refers to an abnormal phenomenon in which a material expands laterally when stretched, and is also called "Auxetic" effect. The negative poisson ratio structure has a plurality of application potentials, such as indentation resistance, that is, when the structure is compressed, the internal units gather to the compression points, so that the effect of locally enhancing the mechanical property is achieved, and the resistance of the compressed area to external loads is greatly improved. The method is inspired by the indentation resistance characteristic of the negative Poisson ratio structure, the negative Poisson ratio structure is applied to design a superstructure with certain self-adaptive lubricating capability, and a material (such as nano lubricating particles) with a lubricating function is embedded into a substrate of the negative Poisson ratio superstructure, so that the lubricating material in an area, the surface of which is compressed by an object, is gathered, and the dynamic self-adaptive control of the lubricating effect under the action of an external force is realized. Although it is difficult to find a special material having an auxetic effect among natural materials, in recent years, a mechanical superstructure having a negative poisson's ratio effect can be easily realized by artificially designing an internal unit structure. Negative poisson's ratio superstructures have received much attention from researchers due to their large designable space and artificial coding properties. In addition, the rapid development of the 3D printing manufacturing process paves the way for the negative Poisson ratio structure to move from theoretical exploration to practical application.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a self-adaptive lubricating superstructure based on a negative poisson's ratio substrate, which can maximize the effect of a lubricating material and lay a foundation for self-adaptive dynamic control of surface lubrication.
In order to achieve the purpose, the invention adopts the technical scheme that:
a self-adaptive lubricating superstructure based on a negative Poisson ratio structure comprises a multi-level negative Poisson ratio base lattice structure 2 in contact with a load 3, wherein each layer of negative Poisson ratio base lattice structure 2 introduces lubricating particles 1 through an auxetic effect;
according to the shape and the actual motion condition of the load 3, the multi-level negative Poisson ratio substrate lattice structure 2 in different areas adopts manual coding and dynamic control for realizing the local lubrication effect;
during lubrication, the load 3 acts on the negative Poisson ratio substrate lattice structure 2, and the negative Poisson ratio substrate lattice structure 2 can drive the lubricating particles 1 to converge towards a compression point, so that the lubricating effect of the compression point is enhanced.
The negative Poisson ratio substrate lattice structure 2 is a concave hexagonal unit or a chiral/anti-chiral structure.
The lubricating particles 1 are selected from lubricating materials of nano-metal particles, polymer particles or ceramic particles.
And selecting a 3D printing manufacturing process according to actual requirements, integrally and rapidly manufacturing the negative Poisson's ratio substrate lattice structure 2 and the lubricating particles 1, and adopting a photocuring (VPP), powder bed melting (PBF) or material extrusion Molding (MD) process.
Compared with the prior art, the invention has the following remarkable advantages:
(1) the negative Poisson ratio substrate lattice structure 2 introduces the lubricating particles 1 through the auxetic effect, so that the lubricating particles 1 and the negative Poisson ratio substrate lattice structure 2 are integrated and organically combined;
(2) according to the invention, the hierarchical structure of the negative Poisson ratio substrate lattice structure 2 in different regions can be adjusted according to the actual application requirements, so that the manual coding and dynamic control of the local lubricating effect can be realized;
(3) according to the invention, the negative Poisson ratio substrate lattice structure 2 and the lubricating particles 1 are manufactured by adopting a 3D printing manufacturing process, and the negative Poisson ratio effect is only influenced by structural design and does not depend on chemical components of used preparation materials, so that the negative Poisson ratio substrate lattice structure can be selected from various 3D printing processes and corresponding materials according to actual conditions, and the negative Poisson ratio substrate lattice structure has the characteristics of process diversification and strong material compatibility, and can realize the rapid, low-cost and integrated manufacturing of the self-adaptive lubricating superstructure.
Drawings
FIG. 1 is a schematic diagram of the adaptive lubrication mechanism of the present invention, wherein (a) is a schematic diagram of a negative Poisson's ratio substrate lattice structure prior to compressive deformation; and (b) is a schematic representation of the negative poisson's ratio base lattice structure after compressive deformation.
Detailed Description
The present invention will be described in detail below with reference to examples and the accompanying drawings.
Referring to fig. 1, the self-adaptive lubricating superstructure based on the negative poisson ratio substrate comprises a multi-level negative poisson ratio substrate lattice structure 2 which is in contact with a load 3, and according to the shape and the actual motion condition of the load 3, the multi-level negative poisson ratio substrate lattice structure 2 in different areas adopts manual coding and dynamic control for realizing a local lubricating effect; each layer of negative poisson's ratio base lattice structure 2 introduces a lubricating particle 1 by the auxetic effect. During lubrication, the load 3 acts on the negative Poisson ratio substrate lattice structure 2, and the negative Poisson ratio substrate lattice structure 2 can drive the lubricating particles 1 to converge towards a compression point, so that the lubricating effect of the compression point is enhanced.
The negative Poisson ratio substrate lattice structure 2 is a concave hexagonal unit or a chiral/anti-chiral structure.
The lubricating particles 1 are selected from lubricating materials such as nano metal particles, polymer particles, ceramic particles and the like.
And selecting a 3D printing manufacturing process according to actual requirements, integrally and rapidly manufacturing the negative Poisson's ratio substrate lattice structure 2 and the lubricating particles 1, and adopting a photocuring (VPP), powder bed melting (PBF) or material extrusion Molding (MD) process.
Claims (4)
1. An adaptive lubricating superstructure based on negative poisson's ratio substrate, comprising a multi-level negative poisson's ratio substrate lattice structure (2) in contact with a load (3), characterized in that: each layer of negative Poisson ratio substrate lattice structure (2) is introduced into the lubricating particles (1) through an auxetic effect;
according to the shape and the actual motion condition of the load (3), the multi-level negative Poisson ratio substrate lattice structures (2) in different areas adopt artificial coding and dynamic control for realizing the local lubrication effect;
during lubrication, the load (3) acts on the negative Poisson ratio substrate lattice structure (2), and the negative Poisson ratio substrate lattice structure (2) can drive the lubricating particles (1) to converge towards a compression point, so that the lubricating effect of the compression point is enhanced.
2. The negative poisson's ratio substrate-based adaptive lubricating superstructure according to claim 1, characterized in that: the negative Poisson's ratio substrate lattice structure (2) selects concave hexagonal units or selects a chiral/anti-chiral structure.
3. The negative poisson's ratio substrate-based adaptive lubricating superstructure according to claim 1, characterized in that: the lubricating particles (1) are selected from lubricating materials of nano metal particles, polymer particles or ceramic particles.
4. The negative poisson's ratio substrate-based adaptive lubricating superstructure according to claim 1, characterized in that: and selecting a 3D printing manufacturing process according to actual requirements, and integrally and rapidly manufacturing the negative Poisson ratio substrate lattice structure (2) and the lubricating particles (1) by adopting a photocuring (VPP), powder bed melting (PBF) or material extrusion Molding (MD) process.
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| CN202210153401.5A CN114542937B (en) | 2022-02-18 | 2022-02-18 | Self-adaptive lubricating superstructure based on negative Poisson ratio substrate |
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| CN202210153401.5A CN114542937B (en) | 2022-02-18 | 2022-02-18 | Self-adaptive lubricating superstructure based on negative Poisson ratio substrate |
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| CN114542937B CN114542937B (en) | 2022-12-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100119792A1 (en) * | 2008-11-10 | 2010-05-13 | Zheng-Dong Ma | Three-dimensional auxetic structures and applications thereof |
| CN105555517A (en) * | 2013-03-15 | 2016-05-04 | 哈佛大学校长及研究员协会 | Low porosity auxetic sheet |
| CN110206824A (en) * | 2019-06-13 | 2019-09-06 | 西安交通大学 | A kind of regulation method of the porous oil-containing retainer with Negative poisson's ratio |
| CN110744873A (en) * | 2019-11-22 | 2020-02-04 | 南京工业大学 | 3D printing structure composite material sandwich board with negative Poisson ratio effect and processing method |
| CN111664346A (en) * | 2020-06-15 | 2020-09-15 | 华中科技大学 | Super-smooth structure suitable for large-scale long-period oil-free condition |
| CN112945431A (en) * | 2021-03-24 | 2021-06-11 | 南开大学 | Conductive porous pressure-sensitive metamaterial with negative Poisson ratio characteristic and preparation method and application thereof |
-
2022
- 2022-02-18 CN CN202210153401.5A patent/CN114542937B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100119792A1 (en) * | 2008-11-10 | 2010-05-13 | Zheng-Dong Ma | Three-dimensional auxetic structures and applications thereof |
| CN105555517A (en) * | 2013-03-15 | 2016-05-04 | 哈佛大学校长及研究员协会 | Low porosity auxetic sheet |
| CN110206824A (en) * | 2019-06-13 | 2019-09-06 | 西安交通大学 | A kind of regulation method of the porous oil-containing retainer with Negative poisson's ratio |
| CN110744873A (en) * | 2019-11-22 | 2020-02-04 | 南京工业大学 | 3D printing structure composite material sandwich board with negative Poisson ratio effect and processing method |
| CN111664346A (en) * | 2020-06-15 | 2020-09-15 | 华中科技大学 | Super-smooth structure suitable for large-scale long-period oil-free condition |
| CN112945431A (en) * | 2021-03-24 | 2021-06-11 | 南开大学 | Conductive porous pressure-sensitive metamaterial with negative Poisson ratio characteristic and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘滕飞 田小永 朱伟军 李涤尘: "连续碳纤维增强聚乳酸复合材料3D打印及回收再利用机理与性能", 《机械工程学报》 * |
| 解芳著: "《高温发汗自润滑材料仿生胞体结构的接触稳定性研究》", 31 December 2015 * |
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