Airtight lubrication joint device of plasma spraying equipment
By installing a dust scraper ring and an oil scraper in the airtight lubrication joint device of the plasma spray equipment, the problem of surface contamination of the target drive shaft during the spraying process is solved, ensuring the spraying quality and equipment stability, extending the equipment life and reducing maintenance costs.
Patent Information
- Application Number
- CN202422809544.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-18
AI Technical Summary
The airtight lubricating joint device of existing plasma spraying equipment lacks an effective dust scraping mechanism during the spraying process, which causes the surface of the target material drive shaft to be contaminated, affecting the adhesion and quality of the coating and reducing product performance.
A dust scraping device including a floating joint, an oil seal ring, an air seal ring and a scraper ring is designed. A dust scraping device is arranged inside the floating joint. The scraping device, the scraping device, the scraping device, the floating joint is provided with a dust scraping ring, a dust scraping ring and a dust scraping device, a floating joint device, a floating joint device, a floating joint device, a dust collecting box and an air supply port are arranged outside the floating joint, which are used to scrape and collect dust, and blow it into the dust collecting box through airflow to prevent external impurities from entering the spraying area.
Effectively scrape away dust and impurities on the target drive shaft, keep the spraying environment clean, improve coating adhesion and quality, extend equipment life, and reduce maintenance and replacement costs.
Smart Images
Figure CN223373191U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of spraying equipment, and more specifically relates to an airtight lubricating joint device for plasma spraying equipment. Background Art
[0002] Plasma spraying equipment is an advanced material surface treatment technology. It utilizes the high temperature and high speed characteristics of plasma to heat the spray material (such as metals and ceramics) to a molten or semi-molten state and sprays it at high speed onto the pre-treated workpiece surface, forming a firmly adherent surface coating. This equipment has a wide range of applications in the field of materials science. It can be used for surface strengthening and surface modification of materials, imparting properties such as wear resistance, corrosion resistance, high temperature oxidation resistance, electrical insulation, heat insulation, radiation protection, friction reduction, and sealing properties to the substrate surface.
[0003] During the operation of plasma spray equipment, the oil-air lubrication system ensures that all moving parts of the plasma spray equipment are fully lubricated, reducing friction and wear, thereby improving the operating efficiency and stability of the equipment. Through the oil-air lubrication joint device, lubricating oil and compressed air are mixed and delivered to the parts that need lubrication, forming an effective lubricating film, reducing the friction coefficient and minimizing energy loss.
[0004] During the target production process, the target is placed in the spray chamber of the spray equipment, and then the coating is sprayed on the target surface using a spray gun installed in the spray chamber. To ensure the seal between the spray chamber and the target drive shaft, an airtight lubrication joint device is usually installed on the outside of the target drive shaft to form a dynamic seal with the target drive shaft.
[0005] However, during spraying, a large amount of dust is generated in the spray chamber. The target drive shaft needs to frequently enter and exit the spray chamber during operation, causing surface contamination of the target drive shaft and shortening its service life. Current joint devices lack an effective dust scraping mechanism, resulting in impurities such as oil and dust remaining on the target drive shaft surface. These impurities can seriously affect the adhesion and quality of the coating during the plasma spraying process, reducing the overall performance of the product. Therefore, to ensure the quality and efficiency of plasma spraying, effective dust removal measures must be implemented during the spraying process. Utility Model Content
[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an airtight lubricating joint device for plasma spraying equipment, which has the advantages of improving the spraying quality and protecting the spraying equipment.
[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an airtight lubricating joint device for plasma spraying equipment, comprising:
[0008] A floating joint, one end of which is fixed to the spray chamber through an expansion joint, and the other end of which is wrapped around the outside of the target drive shaft and forms a dynamic seal with the target drive shaft;
[0009] Among them, an oil seal ring, an air seal ring and a scraper ring are arranged in sequence inside the floating joint along the moving direction of the target material transmission shaft, a dust collecting box connected to the interior of the floating joint and close to the scraper ring is provided on the outer lower side of the floating joint, and an air supply port connected to the interior of the floating joint and facing the dust box is provided on the outer upper side of the floating joint.
[0010] By adopting the above technical solution, the scraper ring scrapes off the dust adhering to the target drive shaft when the target drive shaft rotates, and blows it into the dust collecting box through the air flow of the air supply port, which can prevent external gas, dust or other impurities from entering the spraying area, keep the spraying environment clean and stable, and ensure the spraying quality.
[0011] In a preferred embodiment: it also includes an oil scraping device for scraping off residual lubricating oil on the surface of the target material transmission shaft, the oil scraping device is connected to the end of the floating joint away from the spraying chamber, and forms a dynamic seal with the target material transmission shaft.
[0012] By adopting the above technical solution, the oil scraping device can scrape off excess lubricating oil on the target material drive shaft, which helps to prevent the lubricating oil from dripping or splashing, and keeps the equipment clean and safe.
[0013] In a preferred embodiment: the oil scraping device includes an oil scraping plate connected to the end of the floating joint away from the spraying chamber, an oil receiving box installed on the side of the oil scraping plate away from the floating joint, and an oil scraping ring located in the oil receiving box and in contact with the surface of the target material drive shaft.
[0014] By adopting the above technical solution, the oil scraper plate and the oil scraper ring fit tightly on the outside of the target drive shaft, which can effectively scrape off excess lubricating oil on the surface of the target drive shaft, ensure the cleanliness of the target drive shaft, prevent the lubricating oil from dripping or splashing, and reduce the waste of lubricating oil.
[0015] In a preferred embodiment, the oil receiving box includes an upper box body and a lower box body detachably arranged on the oil scraper plate, and an oil drain port is arranged at the bottom of the lower box body.
[0016] By adopting the above technical solution, the upper box body and the lower box body are respectively located on the upper and lower sides of the oil scraper ring, and are used to collect the scraped lubricating oil, which not only avoids the scattering and secondary pollution of the lubricating oil, but also facilitates the recovery and reuse of the lubricating oil. The lower box body is used to discharge the collected lubricating oil through the oil drain port after the oil receiving box is full of lubricating oil.
[0017] In a preferred embodiment, one side surface of the oil scraper plate extends toward the inside of the oil receiving box and forms an annular protrusion, and the oil scraper ring is fixed on the annular protrusion via an annular clamp.
[0018] By adopting the above technical solution, the oil scraper ring is removable, which is convenient for later maintenance and replacement. The design of the annular protrusion creates a closer contact surface between the oil scraper plate and the oil collecting box, which helps the oil scraper ring to more effectively scrape off the oil stains attached to the target drive shaft.
[0019] In a preferred embodiment: the number of the oil sealing rings is two, and an oil sealing bearing is provided between the two oil sealing rings, an oil guide groove is provided inside the oil sealing bearing, and an oil filling port and an oil return port connected to the oil guide groove are respectively provided on the upper side and the lower side of the floating joint.
[0020] By adopting the above technical solution, the design of the oil filling port allows lubricating oil to be added to the oil seal bearing when necessary to ensure sufficient lubrication of the target material drive shaft. The oil return port is used to recover and discharge excess lubricating oil to prevent lubricating oil from accumulating and leaking inside the equipment.
[0021] In a preferred embodiment, there are two air-sealing rings, and an air-sealing bearing is provided between the two air-sealing rings. An air-sealing chamber is provided inside the air-sealing bearing, and a high-pressure air-sealing port communicating with the air-sealing chamber is provided on the upper side of the floating joint.
[0022] By adopting the above technical solution, two air sealing rings are located on both sides of the air sealing bearing, forming a double seal for the target material drive shaft, which can effectively prevent external gas or impurities from entering the spraying area through the gap between the target material drive shaft and the air sealing ring, thereby improving the sealing effect of the spray chamber.
[0023] Compared with the prior art, this application has the following beneficial effects:
[0024] 1. On the one hand, it can effectively scrape off impurities such as oil and dust on the surface of the connecting parts to ensure the cleanliness of the sprayed parts surface. On the other hand, it also prevents the intrusion of external impurities and oil, thereby significantly improving the adhesion and quality of the plasma sprayed coating.
[0025] 2. Reduce friction and wear between connecting parts and reduce the risk of corrosion caused by impurities and oil stains. This not only extends the service life of spraying equipment and connecting parts, but also reduces maintenance and replacement costs, and improves the overall performance and economic benefits of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic diagram of the overall structure of this embodiment when installed;
[0027] Figure 2 This is a schematic cross-sectional view of the embodiment Figure 1 ;
[0028] Figure 3 This embodiment Figure 2 Schematic diagram of the enlarged structure of A;
[0029] Figure 4 This is a schematic cross-sectional view of the embodiment Figure 2 .
[0030] Explanation of the accompanying symbols: 1. Spray chamber; 2. Floating joint; 3. Expansion joint; 4. Target drive shaft; 5. Dust scraper ring; 6. Dust collecting box; 7. Air supply port; 8. Oil seal ring; 9. Oil return port; 10. Oil filling port; 11. Oil seal bearing; 12. Oil scraper plate; 13. Oil scraper ring; 14. Upper box body; 15. Lower box body; 16. Annular clamp; 17. Air seal ring; 18. Air seal bearing; 19. High-pressure airtight port. DETAILED DESCRIPTION
[0031] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure.
[0032] In the description of the present disclosure, it should be understood that the terms "up", "down", "left", "right", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the disclosed product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.
[0033] An airtight lubricating joint device for plasma spraying equipment, such as Figure 1-4 As shown, it includes a floating joint 2, one end of which is fixed to the spray chamber 1 through an expansion joint 3, and the other end is covered on the outside of the target material transmission shaft 4 and forms a dynamic seal with the target material transmission shaft 4, so that the spray chamber 1 can maintain a stable sealing state during operation.
[0034] Among them, the floating joint 2 is provided with an oil seal ring 8, an air seal ring 17 and a dust scraper ring 5 in sequence along the moving direction of the target material transmission shaft 4. The dust scraper ring 5 is used to scrape off impurities such as oil, dust and the like on the surface of the target material transmission shaft 4 to ensure the cleanliness of the surface of the sprayed parts; the outer lower side of the floating joint 2 is provided with a dust collecting box 6 which is connected to its interior and close to the dust scraper ring 5, for receiving impurities scraped off by the dust scraper ring 5, thereby avoiding the scattering of impurities and secondary pollution; the outer upper side of the floating joint 2 is provided with an air supply port 7 which is connected to its interior and directly faces the dust box 6. Gas is replenished into the dust collecting box 6 through the air supply port 7, which helps to maintain the air pressure balance in the dust collecting box 6 and prevents impurities from being unable to enter the dust collecting box 6 smoothly due to the negative pressure generated by scraping. When the target material transmission shaft 4 rotates, it can also be blown into the dust collecting box 6 by the airflow of the air supply port 7, thereby preventing external gas, dust or other impurities from entering the spraying area, keeping the spraying environment clean and stable, and ensuring the spraying quality.
[0035] In one specific embodiment, Figure 2-3 As shown, there are two oil seal rings 8, and an oil seal bearing 11 is provided between the two oil seal rings 8. An oil guide groove is provided inside the oil seal bearing 11. The upper and lower sides of the floating joint 2 are respectively provided with an oil filling port 10 and an oil return port 9 connected to the oil guide groove. The design of the oil filling port 10 allows lubricating oil to be added to the oil seal bearing 11 when necessary to ensure sufficient lubrication of the target material transmission shaft 4. The oil return port 9 is used to recover and discharge excess lubricating oil to prevent the lubricating oil from accumulating and leaking inside the equipment.
[0036] In one specific embodiment, Figure 2-3 As shown, the airtight lubricating joint device also includes an oil scraper device for scraping off residual lubricating oil on the surface of the target material transmission shaft 4. The oil scraper device is connected to the end of the floating joint 2 away from the spray chamber 1 and forms a dynamic seal with the target material transmission shaft 4. It can scrape off excess lubricating oil on the target material transmission shaft 4, helping to prevent the lubricating oil from dripping or splashing, and keeping the equipment clean and safe.
[0037] Specifically, if Figure 2 As shown, the oil scraping device includes an oil scraping plate 12 connected to the end of the floating joint 2 away from the spray chamber 1, an oil receiving box installed on the side of the oil scraping plate 12 away from the floating joint 2, and an oil scraping ring 13 located in the oil receiving box and in contact with the surface of the target drive shaft 4. The oil scraping plate 12 and the oil scraping ring 13 are tightly fitted to the outer side of the target drive shaft 4, and can effectively scrape off excess lubricating oil from the surface of the target drive shaft 4, ensuring the cleanliness of the target drive shaft 4, preventing lubricating oil from dripping or splashing, and reducing lubricating oil waste.
[0038] It is worth mentioning that Figure 2As shown, the oil collecting box includes an upper box body 14 and a lower box body 1515 which are detachably arranged on the oil scraper plate 12. An oil drain port 16 is provided at the bottom of the lower box body 15. The upper box body 14 and the lower box body 15 are respectively located on the upper and lower sides of the oil scraper ring 13 for collecting the scraped lubricating oil, which not only avoids the scattering and secondary pollution of the lubricating oil, but also facilitates the recovery and reuse of the lubricating oil. The lower box body 15 is used to allow the collected lubricating oil to be discharged when needed. One side surface of the oil scraper plate 12 extends toward the inside of the oil collecting box and forms an annular protrusion. The oil scraper ring 13 is fixed on the annular protrusion by an annular clamp 16. The design of the annular protrusion forms a closer contact surface between the oil scraper plate 12 and the oil collecting box, which helps the oil scraper ring 13 to more effectively scrape off the oil stains attached to the oil scraper plate 12.
[0039] In one specific embodiment, Figure 2-3 As shown, there are two air-sealing rings 17 , and an air-sealing bearing 18 is provided between the two air-sealing rings 17 . The air-sealing bearing 18 has an airtight chamber inside, and a high-pressure airtight port 19 communicating with the airtight chamber is provided on the upper side of the floating joint 2 .
[0040] In one specific embodiment, Figure 4 As shown, the bottom of the dust receiving box 6 has an opening, and a sealing plate is provided at the opening. The sealing plate is connected to the dust receiving box 6 by bolts. When cleaning dust, the sealing plate can be opened to clean the dust in the dust receiving box 6.
[0041] The working process and beneficial effects of the utility model are as follows:
[0042] During the movement of the target drive shaft 4, the scraper ring 5, the air seal ring 17, and the oil scraper ring 13 act simultaneously. Specifically, the scraper ring 5 scrapes off impurities adhering to the surface of the target drive shaft 4. With the help of the air supply port 7 to maintain the air pressure balance in the dust collecting box 6, the scraped impurities enter the dust collecting box 6. The dust collecting box 6 stores the impurities scraped by the scraper ring 5. When the impurities need to be cleaned, the sealing plate at the bottom of the dust collecting box 6 can be opened.
[0043] The gas seal ring 17 prevents external gas or impurities from entering the spraying area through the gap between the target drive shaft 4 and the gas seal ring 17. When gas needs to be added to the gas seal bearing 18, it is added through the high-pressure gas seal port 19, which can maintain stable air pressure and help prevent equipment failure or deterioration of spraying quality caused by air pressure fluctuations.
[0044] The oil scraper plate 12 and the oil scraper ring 13 scrape off excess lubricating oil on the surface of the target drive shaft 4, and the scraped lubricating oil enters the upper box body 14 and the lower box body 15 to collect the scraped lubricating oil, which not only avoids the scattering and secondary pollution of the lubricating oil, but also facilitates the recovery and reuse of the lubricating oil; and, when replenishing lubricating oil into the oil seal bearing 11, open the oil filling port 10 and inject it through the oil filling port 10. If the oil filling amount is large, the excess lubricating oil is recovered and discharged through the oil return port 9 to prevent the lubricating oil from accumulating and leaking inside the equipment.
[0045] In summary, the airtight lubricating joint device can effectively scrape off impurities such as oil and dust on the surface of the connected parts, ensuring the cleanliness of the sprayed parts surface. On the other hand, it also prevents the intrusion of external impurities and oil, thereby significantly improving the adhesion and quality of the plasma sprayed coating.
[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.
Claims
1. An airtight lubricating joint device for plasma spraying equipment, characterized in that: include: A floating joint (2), one end of which is fixed to the spray chamber (1) via an expansion joint (3), and the other end of which is wrapped around the outside of the target material transmission shaft (4) and forms a dynamic seal with the target material transmission shaft (4); The floating joint (2) is provided with an oil seal ring (8), an air seal ring (17) and a dust scraper ring (5) in sequence along the moving direction of the target material transmission shaft (4), the lower side of the outside of the floating joint (2) is provided with a dust collecting box (6) which is connected to the inside of the floating joint and close to the dust scraper ring (5), and the upper side of the outside of the floating joint (2) is provided with an air supply port (7) which is connected to the inside of the floating joint and is directly opposite to the dust collecting box (6).
2. The airtight lubricating joint device for plasma spraying equipment according to claim 1, characterized in that: It also includes an oil scraping device for scraping residual lubricating oil on the surface of the target material transmission shaft (4); the oil scraping device is connected to one end of the floating joint (2) away from the spraying chamber (1) and forms a dynamic seal with the target material transmission shaft (4).
3. The airtight lubricating joint device for plasma spraying equipment according to claim 2, characterized in that: The oil scraping device comprises an oil scraping plate (12) connected to an end of the floating joint (2) away from the spray chamber (1), an oil receiving box installed on a side of the oil scraping plate (12) away from the floating joint (2), and an oil scraping ring (13) located in the oil receiving box and in contact with the surface of the target material transmission shaft (4).
4. The airtight lubricating joint device for plasma spraying equipment according to claim 3, characterized in that: The oil receiving box comprises an upper box body (14) and a lower box body (15) which are detachably arranged on the oil scraping plate (12); an oil drain port is arranged at the bottom of the lower box body (15).
5. The airtight lubricating joint device for plasma spraying equipment according to claim 3, characterized in that: One side surface of the oil scraper plate (12) extends toward the inside of the oil receiving box and forms an annular protrusion, and the oil scraper ring (13) is fixed on the annular protrusion via an annular clamp (16).
6. The airtight lubricating joint device for plasma spraying equipment according to claim 1, characterized in that: There are two oil seal rings (8), and an oil seal bearing (11) is provided between the two oil seal rings (8). An oil guide groove is provided inside the oil seal bearing (11). An oil filling port (10) and an oil return port (9) communicating with the oil guide groove are provided on the upper side and the lower side of the floating joint (2), respectively.
7. The airtight lubricating joint device for plasma spraying equipment according to claim 1, characterized in that: There are two air-sealing rings (17), and an air-sealing bearing (18) is provided between the two air-sealing rings (17). An air-sealing chamber is provided inside the air-sealing bearing (18), and a high-pressure air-sealing port (19) communicating with the air-sealing chamber is provided on the upper side of the floating joint (2).