CN113136538A - Surface treatment process for sealing section of extension shaft - Google Patents
Surface treatment process for sealing section of extension shaft Download PDFInfo
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- CN113136538A CN113136538A CN202110437858.4A CN202110437858A CN113136538A CN 113136538 A CN113136538 A CN 113136538A CN 202110437858 A CN202110437858 A CN 202110437858A CN 113136538 A CN113136538 A CN 113136538A
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- extension shaft
- sealing section
- treatment process
- surface treatment
- spraying
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/08—Flame spraying
- B05D1/10—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2505/00—Polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2506/00—Halogenated polymers
- B05D2506/10—Fluorinated polymers
- B05D2506/15—Polytetrafluoroethylene [PTFE]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2518/00—Other type of polymers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a surface treatment process of an extension shaft sealing section, which comprises the following steps: step 1: uniformly spreading copper powder on the outer circular surface of the sealing section of the extension shaft by adopting a thermal spraying method to form a transition layer; step 2: and (3) laying the plastic powder on the transition layer by adopting a thermal spraying or spraying and sintering method to form the wear-resistant layer. The invention has the advantages that the plastic powder adopted in the invention has the characteristic of self-leveling in the cooling process after hot melting, the surface of the wear-resistant layer can be smoother and smoother, and the sealing effect of the oil seal on the sealing section of the extension shaft is improved; in addition, the plastic powder adopted in the invention also has self-lubricating property, so that when the sealing section of the extension shaft treated by the invention and the oil seal form a sealing pair together, the friction and the abrasion can be reduced, and the service life of the oil seal can be prolonged.
Description
Technical Field
The invention relates to the technical field of extension shaft sealing, in particular to a surface treatment process of an extension shaft sealing section.
Background
Gear shaft type mechanical transmission systems are widely applied in various industry fields. In a gear shaft type mechanical transmission system, transmission elements mainly comprise gears and shaft parts, and the transmission elements, supporting elements such as a transmission box body and a bearing, and other elements such as a sealing element and a fastening element form the transmission system together.
For a gear shaft type transmission system, at least one power input shaft is needed to input power to the system from the outside of the system, at least one power output shaft is needed to output power to the outside of the system, the shaft ends of the input shaft and the output shaft must extend out of a box body of the system due to the need of power connection with the outside, and the shafts extending out of the box body pass through shaft holes in the box body, so the shafts are commonly called through-hole shafts or extension shafts.
In order to ensure the normal operation of the transmission system, a proper amount of lubricating oil needs to be injected into the transmission case to lubricate and cool various elements forming the transmission system. In order to prevent the lubricating oil in the box body from flowing out of the box body, an oil seal is required to be arranged between the shaft and the box body; for example, chinese utility model publication No. CN205047431U discloses an oil seal structure of a screw compressor extension shaft, which realizes the oil seal of the extension shaft.
The oil seal is used, is an oil leakage prevention sealing means commonly adopted in various gear shaft mechanical transmission systems at present for preventing lubricating oil from flowing out from a position between a transmission shaft and a transmission box body, and a part of the extension shaft, which is matched with an oil seal element to form sealing, is called as a sealing section of the extension shaft. At present, most of oil seals are directly sleeved on a sealing section of a projecting shaft, the sealing effect is poor, and the joint part of the oil seal and the sealing section of the projecting shaft is abraded by friction, so that the service life of the oil seal is shortened.
Disclosure of Invention
The invention aims to solve the technical problem of how to improve the sealing effect of the oil seal on the sealing section of the extension shaft and prolong the service life of the oil seal.
In order to solve the technical problems, the invention provides the following technical scheme:
a surface treatment process for an extension shaft sealing section comprises the following steps:
step 1: uniformly spreading copper powder on the outer circular surface of the sealing section of the extension shaft by adopting a thermal spraying method to form a transition layer;
step 2: and (3) laying the plastic powder on the transition layer by adopting a thermal spraying or spraying and sintering method to form the wear-resistant layer.
Spherical copper powder is sprayed on the outer circular surface of the extension shaft sealing section by adopting a thermal spraying method, so that the spherical copper powder and the outer circular surface of the extension shaft sealing section can form a transition layer which is mutually fused, uniform in thickness and firmly combined, and the transition layer has a rough outer surface, so that the adhesion of plastic powder for subsequently forming a wear-resistant layer is facilitated, and therefore, the transition layer actually plays a role in connection transition between the outer circular surface of the extension shaft sealing section and the wear-resistant layer; after the transition layer is formed, coating plastic powder on the transition layer by adopting a thermal spraying or spraying and sintering method to form a wear-resistant layer firmly combined with the transition layer, wherein the outer surface of the transition layer is rough and has a large specific surface area, so that the bonding area of the plastic powder and the transition layer is increased, and the plastic powder and the transition layer directly form larger bonding force to ensure that the wear-resistant layer can be firmly attached to the transition layer; in addition, the plastic powder adopted in the invention also has self-lubricating property, so that when the sealing section of the extension shaft treated by the invention and the oil seal form a sealing pair together, the friction and the abrasion can be reduced, and the service life of the oil seal can be prolonged.
Preferably, the thermal spraying method in step 1 is plasma spraying or flame spraying.
Preferably, the copper powder is spherical with a diameter of 1-5 μm.
Preferably, the thickness of the transition layer is not more than 15 μm.
Preferably, the thermal spraying method in step 2 is flame spraying.
Preferably, the spraying and sintering method in step 2 is an electrostatic spraying and vacuum furnace sintering method.
Preferably, the plastic powder is polytetrafluoroethylene powder, modified nylon powder, polyether ether ketone resin powder or polyaryletherketone resin powder.
Preferably, the diameter of the plastic powder is not more than 5 μm.
Preferably, the wear resistant layer has a thickness of no more than 10 μm.
Compared with the prior art, the invention has the beneficial effects that:
spherical copper powder is sprayed on the outer circular surface of the extension shaft sealing section by adopting a thermal spraying method, so that the spherical copper powder and the outer circular surface of the extension shaft sealing section can form a transition layer which is mutually fused, uniform in thickness and firmly combined, and the transition layer has a rough outer surface, so that the adhesion of plastic powder for subsequently forming a wear-resistant layer is facilitated, and therefore, the transition layer actually plays a role in connection transition between the outer circular surface of the extension shaft sealing section and the wear-resistant layer; after the transition layer is formed, coating plastic powder on the transition layer by adopting a thermal spraying or spraying and sintering method to form a wear-resistant layer firmly combined with the transition layer, wherein the outer surface of the transition layer is rough and has a large specific surface area, so that the bonding area of the plastic powder and the transition layer is increased, and the plastic powder and the transition layer directly form larger bonding force to ensure that the wear-resistant layer can be firmly attached to the transition layer; in addition, the plastic powder adopted in the invention also has self-lubricating property, so that when the sealing section of the extension shaft treated by the invention and the oil seal form a sealing pair together, the friction and the abrasion can be reduced, and the service life of the oil seal can be prolonged.
Drawings
FIG. 1 is a schematic view of an embodiment of an extension shaft according to the present invention;
fig. 2 is an enlarged view of a in fig. 1.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 and 2, the embodiment discloses a surface treatment process of an extension shaft sealing section, which includes the following steps:
step 1: spherical copper powder with the diameter of 1-5 mu m is uniformly laid on the outer circular surface of the sealing section of the extension shaft 1 by adopting a thermal spraying method to form a transition layer 2 with the thickness of not more than 15 mu m.
Step 2: and (3) applying plastic powder with the diameter of not more than 5 microns on the transition layer by adopting a thermal spraying or spraying and sintering method to form the wear-resistant layer 3 with the thickness of not more than 10 microns.
Spherical copper powder is sprayed on the outer circular surface of the sealing section of the extension shaft 1 by adopting a thermal spraying method, so that the spherical copper powder and the outer circular surface of the sealing section of the extension shaft 1 can form a transition layer 2 which is mutually fused, uniform in thickness and firm in combination, and the transition layer 2 has a rough outer surface, so that the adhesion of plastic powder for subsequently forming the wear-resistant layer 3 is facilitated, and therefore, the transition layer 2 actually plays a role in connection transition between the outer circular surface of the sealing section of the extension shaft 1 and the wear-resistant layer 3; after the transition layer 2 is formed, the plastic powder is coated on the transition layer 2 by adopting a thermal spraying or spraying and sintering method to form a wear-resistant layer 3 which is firmly combined with the transition layer 2, because the outer surface of the transition layer 2 is rough and has a large specific surface area, the bonding area of the plastic powder and the transition layer 2 is favorably increased, and the plastic powder and the transition layer 2 directly form a larger bonding force, so that the wear-resistant layer 3 can be firmly attached to the transition layer 2, meanwhile, a heating process is provided no matter the wear-resistant layer 3 is formed by adopting the thermal spraying or spraying and sintering method, the plastic powder adopted in the embodiment has the self-leveling property in the cooling process after hot melting, the surface of the wear-resistant layer 3 can be smoother and flatter by the self-leveling property, and the sealing effect of an oil seal on a seal section of an extension shaft is improved; in addition, the plastic powder adopted in the embodiment also has self-lubricating property, so that when the sealing section of the protruding shaft 1 treated in the embodiment and the oil seal jointly form a sealing pair, the friction and the wear can be reduced, and the service life of the oil seal can be prolonged.
Further, the thermal spraying method in the step 1 is plasma spraying or flame spraying.
Further, the thermal spraying method in the step 2 is flame spraying, and the spraying and sintering method is electrostatic spraying and vacuum furnace sintering.
Further, the plastic powder is polytetrafluoroethylene powder, modified nylon powder, polyether-ether-ketone resin powder or polyaryletherketone resin powder.
It should be particularly noted that, if the transition layer 2 made of spherical copper powder is not used for connection, but plastic powder is directly laid on the outer circular surface of the sealing section of the extension shaft 1, although the wear-resistant layer 3 can also be formed, the wear-resistant layer 3 is easy to fall off from the surface of the sealing section of the extension shaft 1 under the action of external force, so that the sealing effect is caused, and therefore, the transition layer 2 is indispensable; in addition, the diameter of the spherical copper powder forming the transition layer 2 is not more than 5 μm, otherwise, the thickness of the transition layer 2 is too large, so that the dimensional accuracy of the extension shaft 1 is difficult to control, and meanwhile, a higher spraying temperature is required in the thermal spraying process, so that the mechanical properties of the extension shaft 1 are influenced; furthermore, the diameter of the plastic powder should not exceed 5 μm, otherwise the thickness of the wear-resistant layer 3 is too large, which will affect the dimensional accuracy of the protruding shaft 1 and will be more likely to peel off during operation.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The above-mentioned embodiments only represent embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the concept of the present invention, and these embodiments are all within the protection scope of the present invention.
Claims (9)
1. A surface treatment process for an extension shaft sealing section is characterized by comprising the following steps: the method comprises the following steps:
step 1: uniformly spreading copper powder on the outer circular surface of the sealing section of the extension shaft by adopting a thermal spraying method to form a transition layer;
step 2: and (3) laying the plastic powder on the transition layer by adopting a thermal spraying or spraying and sintering method to form the wear-resistant layer.
2. A surface treatment process of an extension shaft sealing section according to claim 1, wherein: the thermal spraying method in the step 1 is plasma spraying or flame spraying.
3. A surface treatment process of an extension shaft sealing section according to claim 1, wherein: the diameter of the copper powder is 1-5 mu m spherical.
4. A surface treatment process of an extension shaft sealing section according to claim 1, wherein: the thickness of the transition layer is not more than 15 μm.
5. A surface treatment process of an extension shaft sealing section according to claim 1, wherein: the thermal spraying method in the step 2 is flame spraying.
6. A surface treatment process of an extension shaft sealing section according to claim 1, wherein: the spraying and sintering method in the step 2 is a method of electrostatic spraying and vacuum furnace sintering.
7. A surface treatment process of an extension shaft sealing section according to claim 1, wherein: the plastic powder is polytetrafluoroethylene powder, modified nylon powder, polyether-ether-ketone resin powder or polyaryletherketone resin powder.
8. A surface treatment process of an extension shaft sealing section according to claim 1, wherein: the diameter of the plastic powder is not more than 5 μm.
9. A surface treatment process of an extension shaft sealing section according to claim 1, wherein: the thickness of the wear-resistant layer is not more than 10 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110437858.4A CN113136538A (en) | 2021-04-22 | 2021-04-22 | Surface treatment process for sealing section of extension shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110437858.4A CN113136538A (en) | 2021-04-22 | 2021-04-22 | Surface treatment process for sealing section of extension shaft |
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| Publication Number | Publication Date |
|---|---|
| CN113136538A true CN113136538A (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110437858.4A Pending CN113136538A (en) | 2021-04-22 | 2021-04-22 | Surface treatment process for sealing section of extension shaft |
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| Country | Link |
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| CN (1) | CN113136538A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016020A (en) * | 2021-11-09 | 2022-02-08 | 宜宾上交大新材料研究中心 | Method for improving corrosion resistance and wear resistance of cast iron and cast iron material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1256175A (en) * | 1998-09-23 | 2000-06-14 | 坎姆科国际公司 | Hot spray of polymerization material |
| CN103182808A (en) * | 2011-12-28 | 2013-07-03 | 圣戈班高功能塑料集团 | Multilayer complex comprising fluorine-containing polymer surface layer and non-fluorinated polymer transition layer |
| CN106795914A (en) * | 2014-10-14 | 2017-05-31 | 赛峰航空器发动机 | A kind of method of the Hydrostatic fluid bearing with chamber of production |
| CN207470774U (en) * | 2017-10-23 | 2018-06-08 | 唐小超 | Transmission shaft and oil sealing connection structure |
-
2021
- 2021-04-22 CN CN202110437858.4A patent/CN113136538A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1256175A (en) * | 1998-09-23 | 2000-06-14 | 坎姆科国际公司 | Hot spray of polymerization material |
| CN103182808A (en) * | 2011-12-28 | 2013-07-03 | 圣戈班高功能塑料集团 | Multilayer complex comprising fluorine-containing polymer surface layer and non-fluorinated polymer transition layer |
| CN106795914A (en) * | 2014-10-14 | 2017-05-31 | 赛峰航空器发动机 | A kind of method of the Hydrostatic fluid bearing with chamber of production |
| CN207470774U (en) * | 2017-10-23 | 2018-06-08 | 唐小超 | Transmission shaft and oil sealing connection structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016020A (en) * | 2021-11-09 | 2022-02-08 | 宜宾上交大新材料研究中心 | Method for improving corrosion resistance and wear resistance of cast iron and cast iron material |
| CN114016020B (en) * | 2021-11-09 | 2023-11-21 | 宜宾上交大新材料研究中心 | Method for improving corrosion resistance and wear resistance of cast iron and cast iron material |
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Application publication date: 20210720 |
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