Sliding support with DLC self-lubricating composite coating

Abstract

The invention discloses a sliding support with a DLC self-lubricating composite coating. The sliding support comprises a pipe clamp support and a support support. A first sliding plate is arranged at the bottom of the pipe clamp support, a guide plate is arranged on the support, the guide plate is of an annular structure, a second sliding plate is arranged in the guide plate, the first sliding plate is located over the second sliding plate, and during use, the lower surface of the first sliding plate makes contact with the upper surface of the second sliding plate. According to the sliding support, friction of the contact surface can be remarkably reduced.

Description

Technical Field

[0001] The invention relates to a sliding support, in particular to a sliding support with a DLC self-lubricating composite coating. Background Art

[0002] In the fields of thermal power generation, petrochemicals, etc., due to additional displacement and thermal expansion, some equipment pipeline support points will produce thermal displacement during service, and sliding supports are usually used to support pipelines and equipment. Sliding supports are key components in mechanical systems, responsible for supporting and guiding the smooth operation of moving parts. Their design and application directly affect the performance, life and maintenance requirements of mechanical systems.

[0003] Sliding bearings are an important mechanical component widely used in various engineering structures. The following is a detailed introduction to sliding bearings: Sliding bearings are a type of bearing that allows a structure to slide freely in a specific direction. Its working principle is mainly based on the principles of friction and sliding. When external forces act on a building or structure, sliding bearings can allow the structure to move horizontally, thereby absorbing and dispersing the external forces and transmitting them to the structure through the bearings. This characteristic makes sliding bearings have significant advantages in dealing with structural deformation caused by temperature changes, foundation settlement, earthquakes, etc. Sliding bearings usually consist of two parts, the upper part is fixed to the structure, and the lower part can slide or rotate. The specific structure of sliding bearings may vary depending on the application and performance requirements, but generally includes key components such as metal plates, rubber pads, and sliding materials. The metal plate is used to support the weight of the building, the rubber pad plays a role in shock absorption and buffering, and the sliding material enables the bearing to slide under the action of external forces. Sliding bearings can be classified according to different classification standards, such as riser type sliding bearings, elbow pipe sliding bearings and horizontal pipe sliding bearings according to the form of the pipeline; and welded type and pipe clamp type according to the installation form. In bridge engineering, sliding bearings are widely used in various bridge structures such as beam bridges and arch bridges to support the superstructure of the bridge and ensure the stability and safety of the bridge. In the construction field, sliding bearings are mainly used in structures such as high-rise buildings and large public buildings to support the foundation and columns of the building, as well as for earthquake-resistant design. In addition, sliding bearings are also widely used in the field of industrial equipment, such as large-scale machinery and equipment, transportation equipment, pipeline systems and other devices.

[0004] Publication No. CN111663660A, a sliding support, including a cover plate, a spherical cap and a base that slide and fit in sequence from top to bottom, the cover plate is nested and connected with the base, and the spherical cap contacts the cover plate and the base surface respectively; wherein, a first groove is provided on the bottom surface of the base, a sliding plate is provided in the first groove, and the sliding plate forms a sliding friction pair with the receiving table; the cover plate has a flange, and a detachably connected tensile plate is radially installed on the flange, and the peripheral wall of the base is indented to form a limited groove, and the tensile plate is located in the limited groove and can move up and down along the bottom wall of the limited groove. When sliding, the lower part of the support has no slide rail or slide groove structure, can slide freely in both directions, has a small friction coefficient, and a large sliding range (equivalent to the size of the embedded plate), and will not be stuck due to the different sliding direction of the conventional sliding support and the direction of the slide rail or slide groove. After locking, it can resist large tensile pressure and shear force, and has reliable force transmission, which is convenient for workers to construct and install.

[0005] DLC (Diamond-Like Carbon) is a carbon-based film that combines the lubrication properties of graphite with the hardness of diamond. The transfer layer formed on the surface of the grinding pair during the grinding process acts as a lubricating layer, greatly reducing the friction coefficient and wear rate. DLC coating performs well in terms of friction reduction, wear resistance, and corrosion resistance.

[0006] DLC coatings can be applied to a variety of substrates, including metals, alloys, ceramics, and certain polymers. However, the interfacial compatibility between different substrates and DLC coatings may affect the adhesion and performance of the coatings. Therefore, studying how to optimize the bonding strength and compatibility between DLC coatings and specific substrates to ensure the stability and effectiveness of the coatings during long-term use is also an important research direction for this technology.

[0007] Traditional sliding supports usually rely on external lubricants, such as oil or grease, to reduce friction. However, in extreme environments (such as high temperature, high pressure or vacuum environment), external lubricants may fail or cause contamination problems. But even so, the friction coefficient is usually high. High friction generates heat, which affects the operating temperature of the components and may cause material deformation or lubricant performance degradation. This increases the lateral friction of the sliding support, and while twisting itself, it hinders the normal horizontal thermal displacement of the pipeline, resulting in failure of the sliding support and pipeline stress concentration due to uncoordinated deformation, causing the pipeline to unload and fail. Summary of the invention

[0008] The purpose of the present invention is to overcome the disadvantages of the prior art and provide a sliding support with a DLC self-lubricating composite coating, which can significantly reduce the friction of the contact surface.

[0009] To achieve the above object, the present invention discloses a sliding support with a DLC self-lubricating composite coating, including a pipe clamp support and a bracket support;

[0010] A first sliding plate is arranged at the bottom of the pipe clamp support, and a guide plate is arranged on the bracket support. The guide plate is a ring structure, and a second sliding plate is arranged inside the guide plate. The first sliding plate is located directly above the second sliding plate. When in use, the lower surface of the first sliding plate contacts the upper surface of the second sliding plate.

[0011] Furthermore, a reinforcement plate is provided between the bracket support and the guide plate.

[0012] Furthermore, a pipe clamp is provided on the top of the pipe clamp support.

[0013] Further, the pipe clamp holds the pipe.

[0014] Furthermore, the first sliding plate is connected to the bottom of the pipe clamp support through a first rivet.

[0015] Furthermore, the second sliding plate is connected to the bracket support through a second rivet.

[0016] Furthermore, the first sliding plate includes a first substrate, a first bonding layer, a first bearing layer, a first plastic layer and a first DLC coating which are sequentially distributed from top to bottom.

[0017] Furthermore, the second sliding plate includes a second DLC coating, a second plastic layer, a second bearing layer, a second bonding layer and a second substrate which are sequentially distributed from top to bottom.

[0018] Furthermore, the material of the second substrate is 40Cr;

[0019] The material of the second plastic layer is Cr;

[0020] The material of the second bearing layer is CrN;

[0021] The material of the second bonding layer is Cr.

[0022] The present invention discloses a sliding support with a DLC self-lubricating composite coating, including a pipe clamp support and a bracket support;

[0023] A first sliding plate is provided at the bottom of the pipe clamp support, and a guide plate is provided on the bracket support. The guide plate is an annular structure, and a second sliding plate is provided inside the guide plate. The first sliding plate is located directly above the second sliding plate. When in use, the lower surface of the first sliding plate contacts the upper surface of the second sliding plate.

[0024] The first sliding plate includes a first substrate, a first bonding layer, a first bearing layer, a first plastic layer and a first DLC coating which are sequentially distributed from top to bottom;

[0025] The second sliding plate includes a second DLC coating, a second plastic layer, a second bearing layer, a second bonding layer and a second substrate which are sequentially distributed from top to bottom.

[0026] The present invention has the following beneficial effects:

[0027] During specific operation of the sliding support with DLC self-lubricating composite coating described in the present invention, a second sliding plate is provided inside the guide plate, and the first sliding plate is located directly above the second sliding plate. During use, the lower surface of the first sliding plate contacts the upper surface of the second sliding plate, and the first sliding plate and the second sliding plate slide, thereby significantly reducing the friction of the contact surface.

[0028] In addition, the first sliding plate includes a first substrate, a first bonding layer, a first bearing layer, a first plastic layer and a first DLC coating, which are distributed from top to bottom; the second sliding plate includes a second DLC coating, a second plastic layer, a second bearing layer, a second bonding layer and a second substrate, which are distributed from top to bottom. The sliding between the first DLC coating and the second DLC coating can significantly reduce the friction of the contact surface. The sliding bracket has self-lubricating properties. At the same time, in order to solve the problem of bonding strength between the DLC coating and the substrate, a four-layer coating system with excellent load-bearing capacity is designed, which improves the service life of the coating and provides a guarantee for the safe and stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 It is a structural diagram of the present invention;

[0031] Figure 2 4 is a structural diagram of the second sliding plate 42 .

[0032] Among them, 1 is a pipeline, 2 is a connecting bolt, 3 is a pipe clamp support, 41 is a first sliding plate, 42 is a second sliding plate, 5 is a pipe clamp, 6 is a guide plate, 71 is a first rivet, 72 is a second rivet, 8 is a reinforcing plate, 9 is a bracket support, 421 is a second substrate, 432 is a second bonding layer, 433 is a second bearing layer, 434 is a second plastic layer, and 425 is a second DLC coating. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0035] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0036] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0037] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0038] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0041] As is known to all, DLC coating, namely Diamond-Like Carbon, is a surface coating technology with excellent performance. The following is a detailed introduction to DLC coating: DLC coating is an amorphous carbon film, which contains diamond structure (sp 3 bond) and graphite structure (sp 2DLC coating is a metastable amorphous substance with a carbon-carbon bond. This coating is mainly composed of carbon and hydrogen, and sometimes other elements such as nitrogen and silicon may be doped to improve its performance. Through physical vapor deposition (PVD) or chemical vapor deposition (CVD) and other technologies, the carbon source material is evaporated or sputtered onto the surface of the substrate to form a film with diamond-like properties. Characteristics of DLC coating: High hardness: The hardness of DLC coating is close to that of diamond, usually between 3000-5000HV (Vickers hardness), which enables it to effectively improve the wear resistance and scratch resistance of the substrate. Low friction coefficient: The friction coefficient of DLC coating is low, usually between 0.05 and 0.1, which helps to reduce wear between mechanical parts and improve work efficiency. Corrosion resistance and oxidation resistance: DLC coating can resist the erosion of chemical media such as acid, alkali and seawater, and has good oxidation resistance, which enables it to maintain stable performance in high temperature environment. High thermal stability: DLC coating has high thermal stability and can maintain its performance unchanged under high temperature conditions. Good biocompatibility: DLC coating has a high adsorption rate for proteins and a low adsorption rate for platelets, so it has good biocompatibility and is suitable for the biomedical field. The preparation methods of DLC coating mainly include physical vapor deposition (PVD) and chemical vapor deposition (CVD). In addition, there are ion beam deposition (IBAD) and radio frequency plasma enhanced chemical vapor deposition (PECVD) and other methods. The choice of these methods depends on the specific application requirements and the properties of the substrate material.

[0042] Embodiment 1

[0043] refer to Figure 1 and Figure 2 The sliding support with DLC self-lubricating composite coating described in the present invention includes a pipe clamp support 3 and a bracket support 9; a first sliding plate 41 is arranged at the bottom of the pipe clamp support 3, and a guide plate 6 is arranged on the bracket support 9, the guide plate 6 is a ring structure, and a second sliding plate 42 is arranged in the guide plate 6, the first sliding plate 41 is located directly above the second sliding plate 42, when in use, the lower surface of the first sliding plate 41 is in contact with the upper surface of the second sliding plate 42; the first sliding plate 41 includes a first substrate, a first bonding layer, a first bearing layer, a first plastic layer and a first DLC coating distributed in sequence from top to bottom; the second sliding plate 42 includes a second DLC coating 425, a second plastic layer 434, a second bearing layer 433, a second bonding layer 432 and a second substrate 421 distributed in sequence from top to bottom.

[0044] Embodiment 2

[0045] refer to Figure 1 and Figure 2The sliding support with DLC self-lubricating composite coating of the present invention comprises a pipe 1, a connecting bolt 2, a pipe clamp support 3, a first sliding plate 41, a second sliding plate 42, a pipe clamp 5, a guide plate 6, a first rivet 71, a second rivet 72, a reinforcing plate 8 and a bracket support 9;

[0046] A first sliding plate 41 is provided at the bottom of the pipe clamp support 3 , and a guide plate 6 is provided on the bracket support 9 . The guide plate 6 is an annular structure, and a second sliding plate 42 is provided inside the guide plate 6 . The first sliding plate 41 is located directly above the second sliding plate 42 .

[0047] As an implementation scheme of the present invention, a reinforcing plate 8 is provided between the bracket support 9 and the guide plate 6 .

[0048] As an implementation scheme of the present invention, a pipe clamp 5 is provided on the top of the pipe clamp support 3 , and the pipe clamp 5 clamps the pipe 1 .

[0049] As an embodiment of the present invention, the first sliding plate 41 is connected to the bottom of the pipe clamp support 3 through a first rivet 71 , and the second sliding plate 42 is connected to the bracket support 9 through a second rivet 72 .

[0050] As an embodiment of the present invention, the first sliding plate 41 includes a first substrate, a first bonding layer, a first bearing layer, a first plastic layer and a first DLC coating layer, which are sequentially distributed from top to bottom. The second sliding plate 42 includes a second DLC coating layer 425, a second plastic layer 434, a second bearing layer 433, a second bonding layer 432 and a second substrate 421, which are sequentially distributed from top to bottom.

[0051] As an embodiment of the present invention, the material of the first substrate and the second substrate 421 is 40Cr.

[0052] As an embodiment of the present invention, the material of the first plastic layer and the second plastic layer 434 is Cr.

[0053] As an embodiment of the present invention, the material of the first bearing layer and the second bearing layer 433 is CrN.

[0054] As an embodiment of the present invention, the material of the first bonding layer and the second bonding layer 432 are both Cr.

[0055] As an embodiment of the present invention, the thickness of the first bonding layer and the thickness of the second bonding layer 432 are both 200 nm.

[0056] It should be noted that the sliding plate 4 substrate is the commonly used 40Cr, and the designed composite coating is mainly composed of three parts, namely DLC layer / plastic layer Cr / bearing layer CrN, the outer layer DLC exerts tribological properties, the plastic layer is used to reduce the interface shear stress, and the bearing layer is mainly responsible for bearing the external load to reduce the surface tensile stress of the surface layer. In order to improve the bonding performance between the base material and the bearing layer, a bonding layer of chromium (about 200nm thick) is added between the two. The base material is 40Cr, a commonly used industrial steel, the bearing layer is a hard structure CrN layer, the plastic layer is a Cr layer, and the surface layer is a wear-resistant DLC layer. The bonding layer between the base and CrN is selected as a Cr layer according to the idea of ​​component design.

[0057] It should be noted that the present invention solves the problems of traditional sliding brackets in terms of friction, wear, maintenance, and adaptability to the working environment by preparing a composite coating with advantages such as low friction coefficient, high hardness, self-lubrication and corrosion resistance on the surface of the sliding plate. At the same time, in order to solve the problem of poor bonding strength between the DLC coating and the soft substrate, the present invention specially designs a composite coating system to improve the load-bearing capacity. This design can not only effectively ensure the safe and stable operation of pipeline equipment, but also significantly reduce maintenance costs, and has a very broad application prospect.

[0058] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0059] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0060] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A sliding support with a DLC self-lubricating composite coating, characterized in that: It comprises a pipe clamp support (3) and a bracket support (9); A first sliding plate (41) is arranged at the bottom of the pipe clamp support (3), a guide plate (6) is arranged on the bracket support (9), the guide plate (6) is an annular structure, a second sliding plate (42) is arranged inside the guide plate (6), the first sliding plate (41) is located directly above the second sliding plate (42), and when in use, the lower surface of the first sliding plate (41) contacts the upper surface of the second sliding plate (42).

2. The sliding support with DLC self-lubricating composite coating according to claim 1, characterized in that: A reinforcing plate (8) is provided between the bracket support (9) and the guide plate (6).

3. The sliding support with DLC self-lubricating composite coating according to claim 1, characterized in that: A pipe clamp (5) is provided on the top of the pipe clamp support (3).

4. The sliding support with DLC self-lubricating composite coating according to claim 3, characterized in that: The pipe clamp (5) holds the pipe (1).

5. The sliding support with DLC self-lubricating composite coating according to claim 1, characterized in that: The first sliding plate (41) is connected to the bottom of the pipe clamp support (3) via a first rivet (71).

6. The sliding support with DLC self-lubricating composite coating according to claim 1, characterized in that: The second sliding plate (42) is connected to the bracket support (9) via a second rivet (72).

7. The sliding support with DLC self-lubricating composite coating according to claim 1, characterized in that: The first sliding plate (41) comprises a first substrate, a first bonding layer, a first bearing layer, a first plastic layer and a first DLC coating which are sequentially distributed from top to bottom.

8. The sliding support with DLC self-lubricating composite coating according to claim 1, characterized in that: The second sliding plate (42) comprises a second DLC coating (425), a second plastic layer (434), a second bearing layer (433), a second bonding layer (432) and a second substrate (421) which are sequentially distributed from top to bottom.

9. The sliding support with DLC self-lubricating composite coating according to claim 8, characterized in that: The material of the second substrate (421) is 40Cr; The material of the second plastic layer (434) is Cr; The material of the second bearing layer (433) is CrN; The material of the second bonding layer (432) is Cr.

10. A sliding support with a DLC self-lubricating composite coating, characterized in that: It comprises a pipe clamp support (3) and a bracket support (9); A first sliding plate (41) is arranged at the bottom of the pipe clamp support (3), a guide plate (6) is arranged on the bracket support (9), the guide plate (6) is an annular structure, a second sliding plate (42) is arranged inside the guide plate (6), the first sliding plate (41) is located directly above the second sliding plate (42), and when in use, the lower surface of the first sliding plate (41) contacts the upper surface of the second sliding plate (42); The first sliding plate (41) comprises a first substrate, a first bonding layer, a first bearing layer, a first plastic layer and a first DLC coating which are sequentially distributed from top to bottom; The second sliding plate (42) comprises a second DLC coating (425), a second plastic layer (434), a second bearing layer (433), a second bonding layer (432) and a second substrate (421) which are sequentially distributed from top to bottom.

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