Compressor scroll, method for manufacturing compressor scroll, and compressor

Abstract

The compressor scroll plate comprises a substrate and plating layers, the plating layers comprise the first plating layer and the second plating layer, the first plating layer covers at least part of the surface of the substrate, the second plating layer covers at least part of the surface of the first plating layer, and the second plating layer is located on the side, away from the substrate, of the first plating layer; the first plating layer is an amorphous plating layer, and the second plating layer is a crystalline plating layer. The manufacturing method of the scroll plate of the compressor comprises the following steps: forming an amorphous first plating layer on at least part of the surface of a substrate through a first plating solution; and forming a crystalline second plating layer on at least part of the surface of the first plating layer through a second plating solution. The compressor comprises a dynamic vortex plate and a static vortex plate, and at least one of the dynamic vortex plate and the static vortex plate is the vortex plate of the compressor or is manufactured through the manufacturing method. The binding force of the scroll base of the compressor and the wear-resistant coating is improved.

Description

Technical Field

[0001] The present application relates to the field of compressors, and in particular to a compressor scroll, a method for manufacturing a compressor scroll, and a compressor. Background Art

[0002] The scroll of a scroll compressor is easily worn in a high temperature and high pressure working environment, and a coating needs to be formed on the surface of the scroll base to improve the wear resistance of the scroll. At the same time, the compressor scroll needs to be improved to improve the bonding force between the base and the surface coating. Summary of the invention

[0003] The present application aims to provide a compressor scroll and a manufacturing method thereof, so as to improve the bonding force between a substrate and a surface wear-resistant coating.

[0004] A first aspect of the present application provides a compressor scroll, comprising a substrate and a coating, wherein the coating comprises a first coating and a second coating, wherein the first coating is coated on at least a portion of the surface of the substrate, and the second coating is coated on at least a portion of the surface of the first coating, and the second coating is located on a side of the first coating away from the substrate;

[0005] The first coating is an amorphous coating, and the second coating is a crystalline coating.

[0006] In the present application, the crystalline second coating provides wear resistance, and the amorphous first coating has high surface energy, so it can be strongly bonded to both the substrate and the crystalline second coating, thereby improving the bonding strength between the entire coating and the substrate.

[0007] A second aspect of the present application provides a method for manufacturing a compressor scroll, comprising the following steps:

[0008] Immersing the substrate in a first plating solution, or coating the first plating solution on the surface of the substrate, to form an amorphous first plating layer on at least a portion of the surface of the substrate;

[0009] The substrate with the first coating formed on at least a portion of its surface is immersed in a second coating solution, or the second coating solution is applied to at least a portion of the surface of the first coating to form a crystalline second coating on at least a portion of the surface of the first coating.

[0010] According to the manufacturing method of the compressor scroll of the present application, an amorphous first coating is formed on at least part of the surface of the substrate by a first coating solution, and a crystalline second coating is formed on at least part of the surface of the first coating by a second coating solution. The crystalline second coating provides wear resistance, and the amorphous first coating can be strongly bonded to the substrate and the crystalline second coating, thereby improving the bonding force between the compressor scroll substrate and the wear-resistant coating.

[0011] The third aspect of the present application provides a compressor, comprising a movable scroll and a fixed scroll, the movable scroll and the fixed scroll being meshed with each other, at least one of the movable scroll and the fixed scroll being the compressor scroll described above, or at least one of the movable scroll and the fixed scroll being manufactured by the manufacturing method described above.

[0012] At least one of the movable scroll and the fixed scroll of the compressor of the present application is the aforementioned compressor scroll, so that the bonding force between the substrate and the wear-resistant coating can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of a first coating layer and a second coating layer of a compressor scroll provided in one embodiment of the present application;

[0014] Figure 2 is a schematic diagram of a compressor scroll plating provided in one embodiment of the present application;

[0015] Figure 3 is a partial cross-sectional schematic diagram of a compressor provided by one embodiment of the present application;

[0016] Figure 4 is a three-dimensional diagram of a movable scroll of a compressor provided in one embodiment of the present application;

[0017] Figure 5 is a schematic diagram of a method for manufacturing a compressor scroll provided in one embodiment of the present application;

[0018] Figure 6 It is a schematic diagram of a partial process of a method for manufacturing a compressor scroll provided in one embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0020] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0021] The scroll in the scroll compressor is prone to wear in a high temperature and high pressure working environment, and a coating needs to be formed on the surface of the scroll base 1 to improve the wear resistance of the scroll. At the same time, the compressor scroll needs to be improved to improve the bonding force between the base 1 and the surface coating.

[0022] A first aspect of the present application provides a compressor scroll, comprising a substrate 1 and a coating 2, such as Figure 2The coating 2 includes a first coating 21 and a second coating 22. The first coating 21 is coated on at least part of the surface of the substrate 1, and the second coating 22 is coated on at least part of the surface of the first coating 21. The second coating 22 is located on a side of the first coating 21 away from the substrate 1. The first coating 21 is an amorphous coating, and the second coating 22 is a crystalline coating. Figure 1 shown.

[0023] Crystalline and amorphous are two forms of the internal structure of solid materials, and the difference lies in the different arrangements of the internal atoms or molecules. The atoms or molecules inside the crystalline material are arranged in a long-range orderly manner, while the atoms or molecules inside the amorphous material present a short-range disordered arrangement structure, so the amorphous state is also called an amorphous state. The XRD spectrum of amorphous materials presents a bun peak shape, while the XRD spectrum of crystalline materials often has sharp peaks. Due to this difference in internal structure, the performance between crystalline materials and amorphous materials is also very different.

[0024] In the present application, the crystalline second coating 22 is exposed to the outside of the vortex disk, providing good wear resistance. The surface of the amorphous first coating 21 has more dangling bonds and unsaturated bonds, and therefore has a higher surface energy. The greater the difference in surface energy between the coating and the substrate 1, the easier it is to form a strong bond between the two. Due to the large difference in surface energy between the amorphous first coating 21 and the substrate 1, and between the amorphous first coating 21 and the crystalline second coating 22, both the substrate 1 and the second coating 22 can be strongly bonded to the first coating 21. In addition, the amorphous first coating 21 is conducive to the mutual diffusion of atoms in the bonding interface between the first coating 21 and the substrate 1, and the mutual diffusion in the bonding interface between the first coating 21 and the second coating 22, thereby improving the stability of the bonding interface between the first coating 21 and the substrate 1 and the bonding interface between the first coating 21 and the second coating 22. Therefore, the amorphous first coating 21 not only improves the bonding strength between the coating as a whole and the substrate 1, but also the first coating 21 and the second coating 22 can be strongly bonded. Therefore, the compressor scroll of the present application improves the bonding strength between the substrate 1 and the surface wear-resistant coating.

[0025] In addition, since the internal stress of the amorphous first coating 21 is low, the risk of coating shedding and cracking is reduced. In the present application, the amorphous first coating 21 is combined with the crystalline second coating 22, and the crystalline second coating 22 is far away from the substrate 1 relative to the amorphous first coating 21, which can not only improve the bonding force between the coating and the substrate 1, but also improve the wear resistance of the coating to a certain extent.

[0026] In some embodiments, the first coating 21 and the second coating 22 both include nickel and phosphorus, and the mass percentage of phosphorus in the first coating 21 is greater than the mass percentage of phosphorus in the second coating 22. In some embodiments, the first coating 21 and the second coating 22 are sequentially formed on the surface of the vortex substrate 1 by Ni-P chemical plating. The large mass percentage of phosphorus in the coating is conducive to the formation of a short-range disordered amorphous structure; the small mass percentage of phosphorus in the coating is conducive to the formation of a long-range ordered crystalline structure. In some embodiments, the mass percentage of phosphorus in the first coating 21 is greater than or equal to 15wt.%, and the mass percentage of phosphorus in the second coating 22 is less than or equal to 3wt.%. The mass percentage of phosphorus in the first coating 21 is greater than or equal to 15wt.%, and nickel-phosphorus compounds exist in the first coating 21 as metastable Ni5(P,Ni)2 and Ni3(P,Ni) nickel-phosphorus complex mixed compounds, and the Ni-P coating is difficult to form a long-range ordered crystalline state, so most of the structure of the first coating 21 is short-range disordered amorphous. The mass percentage of phosphorus in the second plating layer 22 is less than or equal to 3 wt. %, and the nickel-phosphorus compound directly forms a stable final state of Ni 3 P existing in the second plating layer 22 , so the second plating layer 22 has a higher crystallinity.

[0027] In some embodiments, the thickness of the second coating 22 is greater than the thickness of the first coating 21. In this way, the entire coating can not only be firmly combined with the substrate 1, but also enable the scroll to have sufficient wear resistance. In some embodiments, the thickness of the first coating 21 is 1 to 3 μm, and the thickness of the second coating 22 is 20 to 50 μm.

[0028] In some embodiments, the second coating layer 22 includes graphene. Graphene can improve the self-lubricating property of the second coating layer 22 and further reduce the wear of the scroll during the relative movement between the orbiting scroll 102 and the fixed scroll 101 .

[0029] In some embodiments, the grain size of the second coating layer 22 is in the range of 0.1 to 10 μm, which can provide the compressor scroll with good wear resistance and can be strongly bonded with the first coating layer 21 .

[0030] In some embodiments, the substrate 1 has a first surface 11, and the first surface 11 is at least partially covered with a first coating 21. The first coating 21 has a second surface 201 and a third surface 202, and the second coating 22 has a fourth surface 203 and a fifth surface 204, the second surface 201 is in direct contact with the first surface 11 and connected to each other, the third surface 202 is at least partially in direct contact with the fourth surface 203 and connected to each other, and the fifth surface 204 is at least partially exposed to the outside of the compressor scroll. The roughness of the fifth surface 204 is less than the roughness of the first surface 11. In other words, the surface of the coating 2 is smoother than the surface of the substrate 1, so the coating of the present application can also improve the smoothness of the scroll surface.

[0031] In some embodiments, the compressor scroll base 1 is made of metal, for example, the compressor scroll is made of aluminum alloy, magnesium alloy, titanium alloy or iron alloy.

[0032] A second aspect of the present application provides a method for manufacturing a compressor scroll, comprising the following steps:

[0033] Immersing the substrate 1 in a first plating solution, or coating the first plating solution on the surface of the substrate 1, to form an amorphous first plating layer 21 on at least a portion of the surface of the substrate 1;

[0034] The substrate 1 having the first coating layer 21 formed on at least a portion of its surface is immersed in a second coating solution, or the second coating solution is coated on at least a portion of the surface of the first coating layer 21 to form a crystalline second coating layer 22 on at least a portion of the surface of the first coating layer 21 .

[0035] In some embodiments, a method of manufacturing a compressor scroll, such as Figure 5 As shown, the following steps are included:

[0036] S1, providing a substrate 1, a first plating solution and a second plating solution;

[0037] S2, immersing the substrate 1 in a first plating solution, or coating the first plating solution on the surface of the substrate 1, to form an amorphous first plating layer 21 on at least a portion of the surface of the substrate 1;

[0038] S3, immersing the substrate 1 having the first coating layer 21 formed on at least a portion of its surface into a second coating solution, or coating the second coating solution on at least a portion of the surface of the first coating layer 21 , to form a crystalline second coating layer 22 on at least a portion of the surface of the first coating layer 21 .

[0039] According to the manufacturing method of the compressor scroll of the present application, an amorphous first coating 21 is formed on at least a portion of the surface of the substrate 1 by a first plating liquid, and a crystalline second coating 22 is formed on at least a portion of the surface of the first coating 21 by a second plating liquid, thereby improving the bonding strength between the wear-resistant coating of the compressor scroll and the substrate 1.

[0040] In some embodiments, the first plating solution and the second plating solution both contain nickel ions and phosphorus ions. The nickel ions and phosphorus ions in the first plating solution and the second plating solution are respectively formed into a first coating 21 and a second coating 22 by chemical deposition, and the first coating 21 and the second coating 22 are both Ni-P coatings. Ni-P chemical plating can form a smooth wear-resistant coating on the surface of the compressor scroll. The microstructure of the coating on the surface of the substrate 1 is changed by regulating the reaction conditions of the plating solution, so that the formed coating includes an amorphous first coating 21 and a crystalline second coating 22, and the amorphous first coating 21 is closer to the substrate 1 relative to the crystalline second coating 22.

[0041] In some embodiments, the chemical reaction equation for forming the Ni-P plating layer by the first plating solution and the second plating solution is as follows:

[0042] H2PO2 - +Ni 2+ +H2O=H2PO3+Ni+2H +

[0043] That is, the first plating solution and the second plating solution form the first plating layer 21 and the second plating layer 22 respectively through Ni-P autocatalytic reduction reaction. 2+ ) is reduced to a metallic nickel layer and deposited. At the same time, the growth of nickel metal is also affected by the synchronous precipitation of nickel-phosphorus compounds. When the nickel-phosphorus compounds are more or unstable, a coating with a short-range disordered amorphous internal structure is formed; when the nickel-phosphorus compounds are less and stable, a coating with a long-range ordered internal structure is formed.

[0044] In some embodiments, at least one of the nickel ion concentration, phosphorus ion concentration, pH value and temperature of the first plating solution is different from that of the second plating solution. By adjusting at least one of the nickel ion concentration, phosphorus ion concentration, pH value and temperature in the plating solution, the internal organizational structure of the coating formed on the surface of the substrate 1 can be changed. In a plating solution with a high phosphorus ion concentration, it is easier to grow a short-range disordered coating. In a plating solution with a low phosphorus ion concentration, it is easier to grow a long-range ordered coating.

[0045] In some embodiments, the first plating solution and the second plating solution satisfy at least one of the following conditions a) to c):

[0046] a) the phosphorus ion concentration of the first plating solution is higher than the phosphorus ion concentration of the second plating solution;

[0047] b) the pH value of the first plating solution is lower than the pH value of the second plating solution;

[0048] c) The temperature of the first plating solution is higher than the temperature of the second plating solution.

[0049] The higher the phosphorus ion concentration in the plating solution, the lower the pH value, and the higher the temperature, the more conducive it is to the formation of an amorphous coating; the lower the phosphorus ion concentration, the greater the pH value, and the lower the temperature, the more conducive it is to the formation of a crystalline coating.

[0050] In some embodiments, the first plating solution includes an organic phosphonic acid molecule, wherein the chemical formula of the organic phosphonic acid molecule is as follows:

[0051]

[0052] Wherein, R is a fatty chain or a phenyl derivative. When the first plating solution includes organic phosphonic acid molecules, the first plating layer 21 uses the phosphonic acid functional group as an anchoring group during the formation process, which can increase the bonding force with the interface and weaken the growth of microcrystals, thereby further enhancing the bonding force between the first plating layer 21 and the substrate 1 and the crystalline second plating layer 22.

[0053] In some embodiments, the second plating solution includes graphene. In this way, the formed second coating 22 includes graphene, which can improve the self-lubricating performance of the scroll. In some embodiments, the second plating solution also includes at least one of a complexing agent and a surfactant. Complexing agents and surfactants are conducive to the formation of the crystalline second coating 22 as auxiliary agents.

[0054] In some embodiments, the substrate 1 is made of aluminum alloy, and the coating is formed by, for example, Figure 6 In some embodiments, in step S2, forming an amorphous first coating layer 21 on at least a portion of the surface of the substrate 1 comprises the following steps:

[0055] S21, forming active sites 211 on the surface of the substrate 1, the active sites 211 are, for example, -OH, -Al x O y + , -Al 2+ wait;

[0056] S22, amorphous first coating Ni-P compound deposition begins to occur based on the active sites 211 on the surface of the substrate 1;

[0057] S23 , the amorphous first coating layer 21 (Ni—P coating layer) grows. For example, when the first plating solution contains organic phosphonic acid molecules, the phosphonic acid functional groups 212 serve as anchor groups to form the amorphous first coating layer 21 .

[0058] In some embodiments, in step S3, forming a crystalline second coating layer 22 on at least a portion of the surface of the first coating layer 21 comprises the following steps:

[0059] S31, forming a crystalline second coating layer 22 (Ni-P-graphene coating layer) on the surface of the amorphous first coating layer 21, wherein the graphene 213 is distributed in the second coating layer 22, for example Figure 6 Wherein S21, S22 and S23 are completed in the first plating solution, and S31 is completed in the second plating solution.

[0060] In some embodiments, the method further includes the following steps before step S2 and step S3:

[0061] S41, performing surface degreasing and first surface cleaning on the substrate 1.

[0062] In some implementations, the following steps are further included after step S41:

[0063] S42, performing surface pickling and second surface cleaning on the substrate 1.

[0064] In some implementations, the following steps are further included after step S41 or step S42:

[0065] S43, drying the surface of the substrate 1.

[0066] Both step S41 and step S42 can remove impurities on the surface of the substrate 1 , so that the first coating layer 21 can grow better on the surface of the substrate 1 .

[0067] A third aspect of the present application provides a compressor, the compressor comprising a fixed scroll 101 and a movable scroll 102, the fixed scroll 101 meshing with the movable scroll 102, for example Figure 3 and Figure 4 As shown, at least one of the movable scroll 102 and the fixed scroll 101 is the compressor scroll described above, or at least one of the movable scroll 102 and the fixed scroll 101 is manufactured by the manufacturing method of the compressor scroll described above.

[0068] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A compressor scroll, comprising a substrate and a coating, characterized in that: The coating comprises a first coating and a second coating, wherein the first coating is coated on at least a portion of the surface of the substrate, the second coating is coated on at least a portion of the surface of the first coating, and the second coating is located on a side of the first coating away from the substrate; The first coating is an amorphous coating, and the second coating is a crystalline coating.

2. The compressor scroll according to claim 1, characterized in that: The first plating layer and the second plating layer both include nickel and phosphorus, and the mass percentage of the phosphorus in the first plating layer is greater than the mass percentage of the phosphorus in the second plating layer; The mass percentage of phosphorus in the first coating is greater than or equal to 15wt.%, and the mass percentage of phosphorus in the second coating is less than or equal to 3wt.%; The first plating layer and the second plating layer are formed by chemical plating, respectively.

3. The compressor scroll according to claim 1, characterized in that: The thickness of the second coating is greater than the thickness of the first coating; The thickness of the first coating layer is 1-3 μm, and the thickness of the second coating layer is 20-50 μm.

4. The compressor scroll according to claim 1, wherein: The second coating layer includes graphene, and the grain size of the second coating layer is in the range of 0.1 to 10 μm.

5. The compressor scroll according to claim 1, wherein: The substrate is an aluminum alloy substrate, and the substrate has a first surface, and the first surface is at least partially covered with the first coating; The first coating layer has a second surface and a third surface, the second coating layer has a fourth surface and a fifth surface, the second surface is in direct contact with and connected to the first surface, the third surface is at least partially in direct contact with and connected to the fourth surface, and the fifth surface is at least partially exposed to the outside of the compressor scroll; The roughness of the fifth surface is smaller than the roughness of the first surface.

6. A method for manufacturing a compressor scroll, characterized in that: The following steps are involved: Immersing the substrate in a first plating solution, or coating the first plating solution on the surface of the substrate, to form an amorphous first plating layer on at least a portion of the surface of the substrate; The substrate with the first coating formed on at least a portion of its surface is immersed in a second coating solution, or the second coating solution is applied to at least a portion of the surface of the first coating to form a crystalline second coating on at least a portion of the surface of the first coating.

7. The manufacturing method according to claim 6, characterized in that: The first plating solution and the second plating solution both contain nickel ions and phosphorus ions; At least one of a nickel ion concentration, a phosphorus ion concentration, a pH value, and a temperature of the first plating solution is different from that of the second plating solution.

8. The manufacturing method according to claim 7, characterized in that: The first plating solution and the second plating solution satisfy at least one of the following conditions a) to c): a) the phosphorus ion concentration of the first plating solution is higher than the phosphorus ion concentration of the second plating solution; b) the pH value of the first plating solution is lower than the pH value of the second plating solution; c) The temperature of the first plating solution is higher than the temperature of the second plating solution.

9. The manufacturing method according to claim 6, characterized in that: The first plating solution includes organic phosphonic acid molecules, and the second plating solution includes graphene.

10. A compressor, comprising an orbiting scroll and a stationary scroll, wherein the orbiting scroll and the stationary scroll are meshed with each other, characterized in that: At least one of the movable scroll and the fixed scroll is the compressor scroll according to any one of claims 1 to 5, or at least one of the movable scroll and the fixed scroll is manufactured by the manufacturing method according to any one of claims 6 to 9.

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