CN116006691B - Super-wear-resistant floating oil seal floating seal ring and processing technology thereof - Google Patents
Super-wear-resistant floating oil seal floating seal ring and processing technology thereof Download PDFInfo
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- 238000007667 floating Methods 0.000 title claims abstract description 157
- 238000005516 engineering process Methods 0.000 title claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 49
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000011248 coating agent Substances 0.000 claims abstract description 38
- 238000000576 coating method Methods 0.000 claims abstract description 38
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 230000007704 transition Effects 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 13
- 238000010891 electric arc Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 5
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000005266 casting Methods 0.000 abstract description 5
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 238000005238 degreasing Methods 0.000 description 10
- 238000001035 drying Methods 0.000 description 10
- 229910001018 Cast iron Inorganic materials 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000004506 ultrasonic cleaning Methods 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000000151 deposition Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000004372 laser cladding Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a super wear-resistant floating oil seal floating seal ring, which is formed by casting ductile cast iron, but is not limited to ductile cast iron; the sealing surface of the floating oil seal floating seal ring is treated by diamond-like carbon to form a diamond-like carbon coating film, wherein the diamond-like carbon coating film comprises a transition layer and a carbon layer, and the outermost layer of the carbon layer in the diamond-like carbon coating film is a soft layer; the floating oil seal floating seal ring has the characteristics of low price and better performance, the subsequent processing of the floating oil seal floating seal ring is more convenient due to the spheroidal graphite cast iron, the surface of the floating oil seal floating seal ring made of the spheroidal graphite cast iron is low in roughness after honing, the structure at the sealing surface is easy to store oil, the lubricating degree is increased, the wear resistance of the floating oil seal floating seal ring is better, and the service life of the floating oil seal floating seal ring is greatly prolonged.
Description
Technical Field
The invention relates to the technical field of floating seal rings, in particular to a super-wear-resistant floating oil seal floating seal ring and a processing technology thereof.
Background
The floating oil seal is a special mechanical seal and is a compact mechanical seal mode developed for adapting to severe working environments. The anti-pollution wear-resistant steel has the advantages of strong anti-pollution capability, wear resistance, impact resistance, reliable work, automatic compensation of end face wear, simple structure and the like, and is most commonly applied to engineering machinery products.
Chinese patent CN104152893a discloses a method for forming a wear-resistant porous laser cladding coating of a powder hot forging floating oil seal ring. The method forms the wear-resistant porous laser cladding coating on the working end surface of the powder hot forging floating oil seal ring by improving the existing laser cladding technology and combining with specific technological parameters, and has the advantages of rapid cladding scanning data processing, no loss of powder, no impurity, accurate presetting, effective prevention of the influence of cladding layer protrusions on the powder presetting process, formation of a wear-resistant surface without adding precious metals, formation of a pore self-lubricating function cladding coating and the like. The manufacturing cost of the powder hot forging floating oil seal ring is reduced, the production efficiency is improved, and good mechanical properties of parts are obtained;
in the prior art, the floating oil seal generally consists of a pair of wear-resistant floating seal rings and a pair of rubber rings, and is assembled in a floating seal seat for use. After the assembly is completed, the sealing end face of the floating seal ring generates certain end face pressure under the action of the elastic force of the o-shaped ring, and meanwhile, an extremely thin oil film is formed on the sealing end face, so that the two sealing end faces are in boundary friction or semi-fluid friction working conditions, the oil film can play a role in sealing and lubricating, and the service life of the floating seal ring is prolonged. The existing floating seal ring is made of high alloy cast iron material, so that the casting process is more and the production cost is too high. And the hardness of the alloy cast iron after heat treatment can reach 55-72HRC, the subsequent processing process is difficult, and the alloy cast iron is a test for production equipment and cutters.
Disclosure of Invention
The invention aims to solve the problems of the background technology, and provides a super-wear-resistant floating oil seal floating seal ring and a processing technology thereof, wherein the material of the floating seal ring is changed, the diamond-like film treatment is carried out on the sealing surface, the wear resistance of the sealing surface of the floating seal ring after the diamond-like treatment is more excellent, and the service life of the floating seal ring is greatly prolonged.
The aim of the invention can be achieved by the following technical scheme:
a super wear-resistant floating oil seal floating seal ring, wherein the floating oil seal floating seal ring is made of ductile cast iron;
The sealing surface of the floating oil seal floating seal ring is treated by diamond-like carbon to form a diamond-like carbon coating film;
the diamond-like coating film comprises a transition layer and a carbon layer, and the outermost layer of the carbon layer of the diamond-like coating film is a soft layer.
As a further scheme of the invention: the thickness of the diamond-like carbon coating film is 1-10 mu m, and the whole hardness range is 1000-3000Hv.
As a further scheme of the invention: the transition layer of the diamond-like coating film comprises one or more kinds of Ti, cr, ni, W which are combined arbitrarily, and the thickness of the transition layer is 0.1-0.7 mu m.
As a further scheme of the invention: the carbon layers of the diamond-like carbon coating film are overlapped in a multi-layer soft-hard alternating mode; the thickness of each soft layer in the carbon layers is 0.1-0.3 mu m, the thickness of each hard layer is 0.5-1.0 mu m, the thickness of the soft layer of the outermost layer is 0.5-1.0 mu m, the hardness of the soft layer is 600-1300Hv, and the hardness of the hard layer is 1800-3000Hv;
as a further scheme of the invention: the spheroidal graphite cast iron consists of the following raw materials in parts by weight: 3.0-4.0 parts of C, 1.8-3.5 parts of Si, 0-0.5 parts of Mn, 0-0.3 parts of P, 0-0.05 parts of S, 0-1.0 parts of Cu, 0-0.1 parts of Mg and 0-0.2 parts of Cr.
A processing technology of a super wear-resistant floating oil seal floating seal ring comprises the following steps:
After the primary product of the floating seal ring is polished and honed, the sealing surface is treated with diamond-like carbon in a multi-arc or magnetic filtration vacuum cathode arc mode, and a diamond-like carbon coating film is formed on the surface of the primary product of the floating seal ring, so that the super-wear-resistant floating oil seal floating seal ring is obtained.
As a further scheme of the invention: before the primary product of the floating seal ring is polished and honed, cleaning is carried out through cleaning equipment, and oil stains and impurities on the surface of the primary product of the floating seal ring are removed.
As a further scheme of the invention: the multi-arc mode is to alternately clean the surface of the substrate of the primary floating seal ring by a gas ion source at high energy and low energy, perform transition layer treatment on the surface of the substrate by magnetron sputtering, and gradually decompose a carbon target by using an electric arc or laser so that carbon atoms are slowly deposited on the surface of the primary floating seal ring under different bias voltages.
As a further scheme of the invention: the magnetic filtration vacuum cathode arc mode is to firstly clean the surface of the primary floating seal ring by a gas ion source, then carry out transition layer treatment, then decompose a carbon target under the treatment of electric arc or laser, filter out large particles by the magnetic filtration mode, and finally deposit the large particles on the surface of the primary floating seal ring under different bias voltages.
The invention has the beneficial effects that:
Compared with the existing floating seal ring which mainly adopts high alloy cast iron, the floating seal ring mainly comprises Cr, mo, ni, V, has high material hardness and has great difficulty in the processing process; the service life of the product is limited; compared with the floating seal ring in the prior art, the floating oil seal ring is cast by using the spheroidal graphite cast iron, and the floating oil seal ring mainly aims at changing the material of the floating seal ring, has low price, can meet the corresponding mechanical property requirement, and is convenient to process the floating oil seal ring in the follow-up process, the surface of the floating oil seal ring made of the spheroidal graphite cast iron is small in roughness after honing, the structure at the sealing surface is easy to store oil, the lubricating degree is increased, and the floating oil seal ring is equivalent to the abrasion resistance of the sealing surface of the existing high alloy cast iron; the sealing surface of the floating oil seal floating seal ring is subjected to diamond-like treatment, so that the wear resistance of the floating oil seal floating seal ring is more excellent, and the service life of the floating oil seal floating seal ring is greatly prolonged; the outermost layer of the carbon layer of the diamond-like carbon coating film is a soft layer, and the outermost layer is the soft layer, so that the lubricity is improved, the initial running-in is accelerated, and the tightness is improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a floating seal ring structure of a floating oil seal in the present invention;
Fig. 2 is a process flow diagram of the present invention.
In the figure: 1. floating oil seal floating seal ring; 2. and (5) coating a diamond-like carbon coating.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the invention relates to a super wear-resistant floating oil seal floating seal ring, which is formed by casting ductile cast iron, but is not limited to ductile cast iron, and the ductile cast iron comprises the following raw materials in parts by weight: 3.5 parts of C, 2.0 parts of Si, 0.2 part of Mn, 0 part of P, 0.03 part of S, 0.5 part of Cu, 0.05 part of Mg and 0.1 part of Cr.
The sealing surface of the floating oil seal floating seal ring 1 is subjected to diamond-like treatment, and a diamond-like coating film 2 is formed; the diamond-like coating film 2 is positioned at the inner side end part of the floating oil seal floating seal ring 1, and the outermost layer of the carbon layer of the diamond-like coating film 2 is a soft layer;
Example 2
The super wear-resistant floating oil seal floating seal ring is formed by casting ductile cast iron, but is not limited to ductile cast iron, and the ductile cast iron comprises the following raw materials in parts by weight: 3.5 parts of C, 2.4 parts of Si, 0.3 part of Mn, 0.2 part of P, 0.03 part of S, 0.5 part of Cu, 0.5 part of Mg and 0.1 part of Cr;
The sealing surface of the floating oil seal floating seal ring 1 is subjected to diamond-like treatment, and a diamond-like coating film 2 is formed; the diamond-like coating film 2 is positioned at the inner side end part of the floating oil seal floating seal ring 1, and the outermost layer of the carbon layer of the diamond-like coating film 2 is a soft layer;
example 3
The super wear-resistant floating oil seal floating seal ring is formed by casting ductile cast iron, but is not limited to ductile cast iron, and the ductile cast iron comprises the following raw materials in parts by weight: 4.0 parts of C, 3.5 parts of Si, 0.5 part of Mn, 0.3 part of P, 0.05 part of S, 1.0 part of Cu, 0.1 part of Mg and 0.2 part of Cr;
The sealing surface of the floating oil seal floating seal ring 1 is subjected to diamond-like treatment, and a diamond-like coating film 2 is formed; the diamond-like coating film 2 is positioned at the inner side end part of the floating oil seal floating seal ring 1, and the outermost layer of the carbon layer of the diamond-like coating film 2 is a soft layer.
By the above embodiment 1-3, the floating oil seal floating seal ring 1 of the present invention is mainly composed of C, si, mn, P, S, cu, mg and Cr, and compared with the existing floating seal ring mainly composed of high alloy cast iron, the high alloy cast iron mainly comprises Cr, mo, ni, V, has high material hardness, and has a large difficulty in the processing process; the service life of the product is limited; compared with the floating seal ring in the prior art, the floating oil seal floating seal ring 1 is cast by spheroidal graphite cast iron, and is mainly characterized in that the material of the floating seal ring is changed, the spheroidal graphite cast iron floating oil seal ring has low price and can meet the corresponding mechanical property requirement, the spheroidal graphite cast iron also can facilitate the subsequent processing of the floating oil seal floating seal ring 1, the surface of the floating oil seal floating seal ring 1 made of spheroidal graphite cast iron material has smaller roughness after honing, the structure at the sealing surface is easy to store oil, the lubrication degree is increased, and the abrasion resistance of the floating oil seal ring is equivalent to that of the sealing surface of the existing high alloy cast iron; the abrasion resistance of the floating oil seal floating seal ring 1 is more excellent after the sealing surface of the floating oil seal floating seal ring is treated by diamond-like carbon, so that the service life of the floating oil seal floating seal ring 1 is greatly prolonged; the outermost layer of the carbon layer of the diamond-like coating film 2 is a soft layer, and the outermost layer is the soft layer, so that the lubricity is improved, the initial running-in is accelerated, and the tightness is improved.
Example 4
Referring to fig. 2, a processing technology of a super wear-resistant floating oil seal floating seal ring includes the following steps:
Step 1: performing heat treatment and machining to perform machining forming on the nodular cast iron material to obtain a primary floating seal ring product;
Step 2: cleaning and drying the primary floating seal ring product by adopting an alcohol mixed solvent; the cleaning solvent adopts an alcohol mixed solvent which is used for automatic vacuum gas-phase degreasing cleaning equipment to remove polar and nonpolar pollutants on the metal surface; the cleaning method adopts the following steps: firstly vacuumizing a working bin body of automatic vacuum gas-phase degreasing and cleaning equipment, then placing a floating seal ring in a cleaning tank of the automatic vacuum gas-phase degreasing and cleaning equipment for ultrasonic cleaning, setting the temperature of the cleaning tank of the automatic vacuum gas-phase degreasing and cleaning equipment at 50 ℃ and the ultrasonic cleaning time at 100s; wherein the parameters related to the drying are set as that the temperature of the drying is 100 ℃ and the drying time is 60s;
Step 3: polishing and honing the primary product of the floating seal ring, and then performing sealing surface diamond-like treatment in a multi-arc or magnetic filtration vacuum cathode arc mode; then, polishing and honing the position where the floating seal ring is processed to obtain a super wear-resistant floating oil seal floating seal ring 1;
The method comprises the steps of adopting a multi-arc mode, alternately cleaning the surface of a substrate of a primary floating seal ring product with high energy and low energy through a gas ion source, performing transition layer treatment on the surface of the substrate through magnetron sputtering, gradually decomposing a carbon target through electric arc or laser, and slowly depositing carbon atoms on the surface of the primary floating seal ring product under different bias voltages;
Firstly, cleaning the surface of a primary floating seal ring product by a gas ion source, then performing transition layer treatment, decomposing a carbon target under the treatment of electric arc or laser, filtering out large particles by a magnetic filtering mode, and finally depositing the large particles on the surface of the primary floating seal ring product under different bias voltages;
The sealing surface diamond-like treatment is carried out by adopting a multi-arc or magnetic filtration vacuum cathode arc mode, so that a diamond-like coating film 2 is formed on the surface of the primary product of the floating seal ring; the thickness of the diamond-like coating film 2 is 1-10 mu m, and the whole hardness range is 1000-3000Hv; the diamond-like carbon coating film 2 comprises a transition layer and a carbon layer, and when the transition layer comprises Ti, cr, ni, W, the thickness of the transition layer is 0.1-0.7 mu m; when the transition layer comprises a Cr and Ti mixture, a Cr and Ni mixture, and a Ti and W mixture, the thickness of the transition layer is 0.2-0.7 mu m; the carbon layers are overlapped in a multi-layer soft-hard alternating mode, and the overall binding force of the carbon layers is greatly improved through the soft-hard alternating mode of the carbon layers; wherein the thickness of each soft layer in the carbon layers is 0.1-0.3 mu m, the thickness of each hard layer is 0.5-1.0 mu m, the thickness of the soft layer of the outermost layer is 0.5-1.0 mu m, the hardness of the soft layer is 600-1300Hv, and the hardness of the hard layer is 1800-3000Hv;
After honing the diamond-like coating film 2, the surface roughness of the floating seal ring is Ra0.01-0.3;
the diamond-like coating film 2 can be also used on a floating seal ring of alloy cast iron related in the prior art.
Example 5
The cleaning method adopts the following steps: firstly vacuumizing a working bin body of automatic vacuum gas-phase degreasing and cleaning equipment, then placing a floating seal ring in a cleaning tank of the automatic vacuum gas-phase degreasing and cleaning equipment for ultrasonic cleaning, setting the temperature of the cleaning tank of the automatic vacuum gas-phase degreasing and cleaning equipment at 60 ℃ and the ultrasonic cleaning time at 150s; wherein the parameters concerning the drying are set such that the temperature of the drying is 120℃and the time of the drying is 90s.
Example 6
The cleaning method adopts the following steps: firstly vacuumizing a working bin body of automatic vacuum gas-phase degreasing and cleaning equipment, then placing a floating seal ring in a cleaning tank of the automatic vacuum gas-phase degreasing and cleaning equipment for ultrasonic cleaning, setting the temperature of the cleaning tank of the automatic vacuum gas-phase degreasing and cleaning equipment at 70 ℃ and the ultrasonic cleaning time at 200s; wherein the parameters concerning the drying are set such that the temperature of the drying is 150 ℃ and the time of the drying is 120s.
The working principle of the invention is as follows: the method comprises the steps of performing high-low energy alternate cleaning on the surface of a substrate of a primary floating seal ring product by a gas ion source, performing transition layer treatment on the surface of the substrate by magnetron sputtering, gradually decomposing a carbon target by using an electric arc or laser, and slowly depositing carbon atoms on the surface of the primary floating seal ring product under different bias voltages; the method comprises the steps of firstly cleaning the surface of a primary floating seal ring product by a gas ion source, then carrying out transition layer treatment, decomposing a carbon target under the treatment of electric arc or laser, filtering out large particles by a magnetic filtering mode, and finally depositing the large particles on the surface of the primary floating seal ring product under different bias voltages; according to the invention, the diamond-like treatment is carried out on the surface of the primary floating seal ring product by adopting the multi-arc mode or the magnetic filtration vacuum cathode arc mode, so that the wear resistance of the sealing surface of the floating seal ring is more excellent, and the service life is greatly prolonged.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (3)
1. The super wear-resistant floating oil seal floating seal ring is characterized in that the floating oil seal floating seal ring (1) is made of ductile cast iron;
the sealing surface of the floating oil seal floating seal ring (1) is treated by diamond-like carbon to form a diamond-like carbon coating film (2);
The diamond-like carbon coating film (2) comprises a transition layer and a carbon layer, and the outermost layer of the carbon layer of the diamond-like carbon coating film (2) is a soft layer;
the processing technology of the super wear-resistant floating oil seal floating seal ring comprises the following steps:
After the primary product of the floating seal ring is polished and honed, performing sealing surface diamond-like treatment in a multi-arc or magnetic filtration vacuum cathode arc mode, and forming a diamond-like coating film (2) on the surface of the primary product of the floating seal ring, thereby obtaining a super wear-resistant floating oil seal floating seal ring (1);
The multi-arc mode is to alternately clean the surface of a substrate of the primary floating seal ring product with high energy and low energy by a gas ion source, perform transition layer treatment on the surface of the substrate by utilizing magnetron sputtering, and gradually decompose a carbon target by using electric arc or laser so that carbon atoms are slowly deposited on the surface of the primary floating seal ring product under different bias voltages;
The magnetic filtration vacuum cathode arc mode is that firstly, a gas ion source is used for cleaning the surface of the primary floating seal ring, then a transition layer is processed, then a carbon target is decomposed under the treatment of electric arc or laser, large particles are filtered out in the magnetic filtration mode, and finally the large particles are deposited on the surface of the primary floating seal ring under different bias voltages;
The thickness of the diamond-like carbon coating film (2) is 1-10 mu m, and the whole hardness range is 1000-3000Hv;
The transition layer of the diamond-like carbon coating film (2) comprises one or more of Ti, cr, ni, W, which are arbitrarily combined, and the thickness of the transition layer is 0.1-0.7 mu m;
The spheroidal graphite cast iron consists of the following raw materials in parts by weight: 3.0-4.0 parts of C, 1.8-3.5 parts of Si, 0-0.5 parts of Mn, 0-0.3 parts of P, 0-0.05 parts of S, 0-1.0 parts of Cu, 0-0.1 parts of Mg and 0-0.2 parts of Cr.
2. The super wear-resistant floating oil seal floating seal ring according to claim 1, wherein the carbon layers of the diamond-like coating film (2) are overlapped in a multi-layer soft-hard alternating mode; the thickness of each soft layer in the carbon layers is 0.1-0.3 mu m, the thickness of each hard layer is 0.5-1.0 mu m, the thickness of the soft layer of the outermost layer is 0.5-1.0 mu m, the hardness of the soft layer is 600-1300Hv, and the hardness of the hard layer is 1800-3000Hv.
3. The process for machining the super wear-resistant floating oil seal floating seal ring according to claim 1, wherein before polishing and honing the primary floating seal ring product, the primary floating seal ring product is cleaned by a cleaning device to remove oil stains and impurities on the surface of the primary floating seal ring product.
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| CN116006691A (en) | 2023-04-25 |
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