Enameled wire surface lubricating oil coating process and device

Abstract

The invention discloses an enamelled wire surface lubricating oil coating process and device, and belongs to the technical field of enamelled wire lubrication coating. Traditional felt is improved, high-elasticity annular rubber and a felt belt are matched to form a felt sleeve with an opening in the outer edge, an enamelled wire to be processed is pressed into a coating annular groove from the lower end of the felt sleeve, and the surface of the enamelled wire is coated with lubricating oil. The two sides of the top of the felt sleeve are expanded through the expanding oil scraping assembly to form an arc-shaped oil dripping area, it is guaranteed that lubricating oil is initially and evenly distributed in the width direction of the felt belt through the first narrow-slit scraper and the second narrow-slit scraper synchronously, and the novel lubricating oil coating technology combining open type rotating felt transfer oil coating and drip oil supply is adopted. And in cooperation with a'same-direction differential 'rotation mode of the enameled wire and the felt sleeve, 'dynamic full-circumference contact' between the enameled wire and the felt sleeve is realized, uniform transfer of an oil film is promoted, and the pain points of non-uniform circumference of traditional drip coating and unstable oil quantity of traditional felt coating are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of lubricating coating of enameled wires, and more particularly to a process and device for coating lubricating oil on the surface of enameled wires. Background Art

[0002] Enameled wire consists of two parts: a conductor and an insulating layer. The electrical and mechanical properties of the enameled wire mostly depend on the quality of the insulating coating. Therefore, after the bare wire is annealed and softened, it needs to be painted and baked. Due to the large surface friction of the enameled wire, it is easy to break the wire after being twisted and then pressed out. Therefore, lubricating oil is needed to lubricate the wire so that it is not easy to break the wire after being twisted and then pressed out.

[0003] Most common coating methods use drop coating or felt friction coating, but drop coating has problems such as insufficient oil control accuracy and uneven distribution in the circumferential direction. As for the traditional felt coating method, the content can refer to the main content of patent number CN218384633U. The amount of oil applied is heavily dependent on the porosity, oil saturation and wear degree of the felt. As a static oil supply carrier, the felt is easily saturated or dried up, and only relies on penetration. The oil points are randomly distributed, and there is a problem of unstable oil supply.

[0004] To this end, in response to the practical problems in the existing technology, a lubricating oil coating process and device for the surface of enameled wire are proposed. The lubricating oil coating process combines drip oil supply with rotating felt rubber wheel transfer oiling. It effectively solves the pain points of uneven circumference of traditional drip coating and unstable oil amount of traditional felt coating through precise metering, felt homogenization, and full-circle rotation dynamic contact. Summary of the Invention

[0005] The purpose of the present invention is to solve the existing practical production problems and provide a process and device for coating the surface of an enameled wire with lubricating oil compared with the prior art.

[0006] The object of the present invention can be achieved by the following technical solution: a device for coating the surface of an enameled wire with lubricating oil, comprising a base and guide rollers mounted on both sides thereof for pulling and guiding the enameled wire, wherein a fixing frame located in the middle of a pair of guide rollers is fixedly mounted on the upper end of the base, and a plurality of equally spaced felt rubber wheel assemblies are rotatably mounted on the fixing frame via a rotating shaft;

[0007] The felt rubber wheel assembly includes a rotating sleeve fixedly sleeved on a rotating shaft, a rubber wheel fixedly mounted on the rotating sleeve, a felt sleeve fixedly sleeved on the outer edge wall of the rubber wheel, the felt sleeve includes a high-elasticity annular rubber fixedly mounted on the rubber wheel, an accommodating cavity with an annular opening slit on the outer circumferential wall of the high-elasticity annular rubber is provided inside, a felt belt extending to the annular opening slit is covered in the accommodating cavity, and a coating annular groove is formed inside the felt belt to accommodate the enameled wire to be pulled through;

[0008] A lifting platform is installed on the fixed frame for lifting, and an oil tank is installed on the lifting platform. A plurality of multi-head oil drip pipes corresponding to the positions of the felt sleeves are distributed at the bottom of the oil tank. An oil scraping component for expanding the coating ring groove is also slidably distributed at the bottom of the oil tank.

[0009] Furthermore, the outer periphery of the rubber wheel is flush with the outer periphery of the rotating sleeve, and the outer portion of the felt sleeve protrudes outside the outer periphery of the rubber wheel.

[0010] Furthermore, a hollow cavity corresponding to the position of the fixing frame is opened in the middle of the base, and an arc frame adapted to the fixing frame is installed in the hollow cavity for lifting, and a plurality of arc-shaped limiting sleeves corresponding to the positions of the felt sleeves are embedded on the inner wall of the arc frame.

[0011] Furthermore, the bottom end wall of the fixed frame and the upper end wall of the arc frame are respectively arc structures that are adapted to each other, the arc limit sleeve is embedded in the upper end wall of the arc frame, and the upper end wall of the arc limit sleeve is provided with an arc tensioning groove with openings at both ends and adapted to the external structure of the felt sleeve.

[0012] Furthermore, the extended oil scraping assembly includes a left extension structure and a right oil scraping structure distributed on the left and right sides of the multi-head oil drip pipe, and the left and right sides of the lifting platform are provided with sliding grooves for the left extension structure and the right oil scraping structure to slide left and right and are consistent with the axis of the guide roller.

[0013] Furthermore, the left extension structure includes a left slide slidably installed in the left slide groove, and a plurality of extension plates corresponding to the positions of the felt sleeves are distributed at the bottom end of the left slide. The right oil scraping structure includes a right slide slidably installed in the right slide groove, and a plurality of narrow slit scrapers 1 and narrow slit scrapers 2 corresponding to the positions of the felt sleeves and distributed inside and outside are distributed at the bottom end of the right slide.

[0014] Furthermore, the expansion piece, the narrow slit scraper 1 and the narrow slit scraper 2 are all plug-ins with the same structure. The part of the plug-in extending to the inside of the coating ring groove is an elliptical structure that is larger than the inner diameter of the initial coating ring groove. After the expansion piece and the narrow slit scraper 2 slide to both sides respectively, the inside of the coating ring groove is expanded to form an arc-shaped oil dripping area for the multi-head oil dripping pipe to drip oil, and an oil flow gap is reserved between the outer edge of the narrow slit scraper 1 and the inner wall of the arc-shaped oil dripping area.

[0015] The present invention also provides a process for coating the surface of an enameled wire with lubricating oil, comprising the following steps:

[0016] Step 1: Preparation for wire laying: Guide multiple enameled wires by the guide rollers on the left and right sides, lift the guide rollers upward until the enameled wires are pressed into the coating ring groove of the felt sleeve, and lift the arc frame upward until the arc limit sleeve is embedded in the outer wall of the felt sleeve;

[0017] Step 2: Prepare for oil dripping: Press down the lifting platform, use the extended oil scraper assembly to expand the upper end of the felt sleeve to both sides to form an arc-shaped oil dripping area, and use the multi-head oil dripping pipe to accurately supply oil to the arc-shaped oil dripping area;

[0018] Step 3: Coating work: The enameled wire and the felt sleeve move in the same direction and at different speeds. Use narrow slit scraper 1 and narrow slit scraper 2 to evenly distribute the oil in a stepped manner to ensure that the lubricating oil is evenly distributed in the width direction of the felt belt. Use the "active coating" mode and "dynamic full-circle contact" to push the lubricating oil molecules to migrate to the surface of the enameled wire.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] 1. This solution adopts a new lubricating oil coating mode that combines "drip oil supply" with "open rotary felt transfer oiling". The extended scraper assembly is used to expand the top of the felt sleeve on both sides to form an arc-shaped oil dripping area. The enameled wire to be treated is pressed into the coating ring groove from the lower end of the felt sleeve. A narrow slit scraper distribution structure composed of narrow slit scraper 1 and narrow slit scraper 2 is adopted to ensure that the lubricating oil supplied by dripping is initially evenly distributed in the width direction of the felt belt. The enameled wire and felt sleeve are rotated in the "same direction and differential speed" mode to achieve "dynamic full-circle contact", promote uniform transfer of the oil film, and effectively solve the pain points of uneven circumference and unstable oil quantity of traditional drip coating.

[0021] 2. This solution improves the traditional felt by using an open felt sleeve with an open outer edge composed of highly elastic annular rubber and a felt belt. The enameled wire to be treated is pressed into the annular opening seam and is in close contact with the elastic fully wrapped felt belt. The lower end of the felt sleeve in contact with the enameled wire is nested and compressed by an arc-shaped limit sleeve. Relying on "elastic mechanical constraints", the gap in the annular opening seam is reduced, which is conducive to forming a relatively closed oiling cavity at the oiling part where the felt sleeve contacts the enameled wire. The rotating motion of the rubber wheel and the fully wrapped contact of the felt belt ensure that the lubricating oil is forcibly and evenly applied to the entire circumference of the enameled wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the present invention when preparing to pay out the wire;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention during coating operation;

[0024] Figure 3 It is a structural schematic diagram of the junction of the base, the arc frame and the guide roller of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the junction of the fixing frame and the felt rubber wheel assembly of the present invention;

[0026] Figure 5It is a structural schematic diagram of the present invention when the fixing frame and the felt rubber wheel assembly are detached;

[0027] Figure 6 It is a structural schematic diagram of the rubber wheel and the felt sleeve of the present invention when they are detached;

[0028] Figure 7 It is a structural schematic diagram of the joint between the lifting platform and the extended oil scraping assembly of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the extended oil scraping assembly of the present invention;

[0030] Figure 9 It is a cross-sectional view of the end portion of the junction of the lowering platform and the extended oil scraping assembly of the present invention;

[0031] Figure 10 Partial cross-section of the present invention Figure 1 ;

[0032] Figure 11 Partial cross-section of the present invention Figure 2 ;

[0033] Figure 12 Partial cross-section of the present invention Figure 3 ;

[0034] Figure 13 It is an end cross-sectional view of the junction of the felt sleeve and the extended oil scraping assembly of the present invention.

[0035] Description of the numbers in the figure:

[0036] 1. Base; 2. Arc frame; 201. Arc limit sleeve; 3. Guide roller; 4. Enameled wire; 5. Fixed frame; 6. Rotating shaft; 7. Rotating sleeve; 8. Rubber wheel; 9. Felt sleeve; 901. Coating ring groove; 902. Annular opening seam; 10. Lifting platform; 11. Oil tank; 12. Multi-head oil drip pipe; 13. Extension piece; 14. Slit scraper 1; 15. Slit scraper 2. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work shall fall within the scope of protection of the present invention.

[0038] Example 1: The present invention discloses a device for coating lubricating oil on the surface of an enameled wire. Figure 1-Figure 3, comprising a base 1 and guide rollers 3 installed on the left and right sides thereof for pulling and guiding the enameled wire 4, a plurality of annular wire grooves are provided on the guide rollers 3, and a lifting drive structure for lifting and lowering the guide rollers 3 is installed inside the base 1;

[0039] A fixing frame 5 located in the middle of a pair of guide rollers 3 is fixedly installed on the upper end of the base 1. A plurality of equally spaced felt rubber wheel assemblies are rotatably installed on the fixing frame 5 through a rotating shaft 6. A driving motor for rotating the rotating shaft 6 is embedded in the end portion of one side of the guide roller 3. A plurality of felt rubber wheel assemblies are arranged along the front and rear directions, and multiple enameled wires 4 can be coated synchronously.

[0040] See also Figure 4-Figure 6 The felt rubber wheel assembly includes a rotating sleeve 7 fixedly sleeved on the rotating shaft 6, a rubber wheel 8 is fixedly mounted on the rotating sleeve 7, and a felt sleeve 9 is fixedly sleeved on the outer edge wall of the rubber wheel 8. The felt sleeve 9 includes a high-elasticity annular rubber fixedly mounted on the rubber wheel 8, and the interior of the high-elasticity annular rubber is provided with an accommodating cavity with an annular opening slit 902 on the outer circumferential wall, and the accommodating cavity is covered with a felt belt extending to the annular opening slit 902. The interior of the felt belt constitutes a coating annular groove 901 for accommodating the enameled wire 4 to be pulled through. The traditional felt is improved, and an open felt sleeve 9 with an outer circumferential opening is formed by combining high-elasticity annular rubber and the felt belt. The enameled wire 4 to be processed is pressed into the coating annular groove 901 at the lower end of the felt sleeve 9, and is in close contact with the elastically fully wrapped felt belt.

[0041] See also Figure 1 and Figure 7-Figure 9 A lifting platform 10 is installed on the fixed frame 5 by an electric telescopic cylinder. An oil tank 11 is installed on the lifting platform 10. A plurality of multi-head oil dripping pipes 12 corresponding to the positions of the felt sleeves 9 are distributed at the bottom of the oil tank 11. An oil scraping component for expanding the coating ring groove 901 is also slidably distributed at the bottom of the oil tank 11;

[0042] The extended scraping assembly includes a left extension structure and a right scraping structure distributed on the left and right sides of the multi-head drip pipe 12. The left and right sides of the lifting platform 10 are provided with a slide groove for the left extension structure and the right scraping structure to slide left and right and aligned with the axis of the guide roller 3.

[0043] The left expansion structure includes a left slide slidably mounted in the left slide, and a plurality of expansion pieces 13 corresponding to the positions of the felt sleeves 9 are distributed at the bottom end of the left slide. The right oil scraping structure includes a right slide slidably mounted in the right slide, and a plurality of narrow slit scrapers 14 and 15 corresponding to the positions of the felt sleeves 9 and distributed inside and outside the right slide at the bottom end. Electromagnetic pieces are embedded and installed on the relative inner walls of the left and right slides. Both the left slide and the right slide are made of magnetic material. The left expansion structure and the right oil scraping structure can be manually moved left and right, or moved by an electric telescopic structure.

[0044] The extension piece 13, the narrow slit scraper 14 and the narrow slit scraper 2 15 are all plug-ins with the same structure. The part of the plug-in extending into the interior of the coating annular groove 901 is an elliptical structure larger than the inner diameter of the initial coating annular groove 901. The elliptical structure is narrow at the bottom and wide at the top. During the downward movement of the lifting platform 10, it is convenient for the extension piece 13, the narrow slit scraper 14 and the narrow slit scraper 2 15 to be smoothly inserted into the coating annular groove 901 through the annular opening 902 without damaging the felt belt. After the extension piece 13 and the narrow slit scraper 2 15 slide to both sides respectively, the interior of the coating annular groove 901 is expanded to form an arc-shaped oil dripping area for the multi-head oil dripping pipe 12 to drip oil, and an oil flow gap is reserved between the outer edge of the narrow slit scraper 14 and the inner wall of the arc-shaped oil dripping area.

[0045] See also Figures 9-13 Before the oil dripping operation, the left expansion structure and the right oil scraping structure are close to each other, and the lifting platform 10 is lowered downward. At this time, the expansion piece 13, the narrow slit scraper 14 and the narrow slit scraper 15 gradually pass through the annular opening slit 902 and are inserted into the coating annular groove 901. Then the left expansion structure and the right oil scraping structure slide in the opposite direction. The expansion piece 13 slides to the left, and the narrow slit scraper 14 and the narrow slit scraper 15 slide to the right. The expansion piece 13 and the narrow slit scraper 15 are of the same size and structure. They rely on elastic support to expand the annular opening slit 902 to both sides to form an arc-shaped oil dripping area of ​​a certain size.

[0046] The multi-head oil dripping tube 12 is used to accurately drip oil into the arc-shaped oil dripping area. During the clockwise rotation of the felt sleeve 9, the enameled wire 4 is synchronously pulled clockwise along the felt sleeve 9, but the rotation speed of the felt sleeve 9 is greater than the pulling speed of the enameled wire 4. The lubricating oil is accurately applied to the felt belt at a certain point before the felt sleeve 9 rotates into the contact area with the enameled wire 4, ensuring that there is enough time for the lubricating oil to diffuse evenly in the felt. The narrow slit scraper type distribution structure composed of the narrow slit scraper 14 and the narrow slit scraper 2 15 is adopted. Compared with the traditional single-point dripping, it ensures that the lubricating oil is initially evenly distributed in the width direction of the felt belt, and the narrow slit scrapers 14 and the narrow slit scrapers 2 15 of different sizes are provided to achieve a stepped uniform oil distribution operation.

[0047] The felt sleeve 9 serves as a "buffer / oil uniformity reservoir". Compared with the traditional felt groove, the annular felt belt no longer undertakes the task of oil storage and gravity oil supply. It only serves as a lubricating oil transfer medium. During its rotation, the enameled wire 4 and the felt sleeve 9 move in the "same direction and differential speed" and adopts the "active chasing" method to achieve "dynamic full-circle contact", which promotes the uniform transfer of the oil film to the enameled wire 4, avoiding the oil drop size and position errors caused by vibration and tension fluctuations when directly dripping onto the wire. The rotating motion of the rubber wheel and the full-wrapped contact of the felt ensure that the lubricating oil is forced and evenly applied to the entire circumference of the enameled wire, eliminating the "stripes" or "half-circle oil-free" phenomenon of traditional dripping or unilateral felt coating to a certain extent, and adopts the same direction motion to avoid the shear damage of the oil film caused by reverse friction motion.

[0048] Embodiment 2: The outer periphery of the rubber wheel 8 is flush with the outer periphery of the rotating sleeve 7, the outer portion of the felt sleeve 9 protrudes outside the outer periphery of the rubber wheel 8, a hollow cavity corresponding to the position of the fixing frame 5 is opened in the middle of the base 1, and an arc-shaped frame 2 adapted to the fixing frame 5 is installed in the hollow cavity for lifting, and a plurality of arc-shaped limit sleeves 201 corresponding to the positions of the felt sleeves 9 are embedded on the inner wall of the arc-shaped frame 2;

[0049] The bottom end wall of the fixing frame 5 and the upper end wall of the arc frame 2 are respectively in an arc-shaped structure that adapts to each other. The arc-shaped limiting sleeve 201 is embedded in the upper end wall of the arc frame 2, and the upper end wall of the arc-shaped limiting sleeve 201 is provided with an arc-shaped tensioning groove with both ends open and adapted to the external structure of the felt sleeve 9. After the multiple enameled wires 4 are pressed into the coating annular groove 901 of the felt sleeve 9, the arc frame 2 is lifted upward until its upper end arc wall is in contact with the bottom end wall of the fixing frame 5.

[0050] At this time, the arc-shaped limit sleeve 201 is embedded in the outer wall of the lower end of the felt sleeve 9. The setting of the arc-shaped limit sleeve 201 is conducive to the tensioning and squeezing effect on the felt sleeve 9. Relying on the "elastic mechanical constraint", the gap of the annular opening seam 902 is reduced, which is conducive to the formation of a relatively closed oiling cavity at the oiling part where the felt sleeve 9 contacts the enameled wire 4, thereby improving the oiling effect.

[0051] In combination with the first and second embodiments, the present invention further proposes a process for coating the surface of an enameled wire with lubricating oil, comprising the following steps:

[0052] Step 1: Preparation for wire pay-off: In the initial state, the arc frame 2 and the guide roller 3 are in a low position, and multiple enameled wires 4 are pulled and guided by the guide rollers 3 on the left and right sides. A wire unwinding device is provided on the right side of the enameled wire 4, and a wire winding device is provided on the left side of the enameled wire 4. The guide roller 3 is lifted upward until the enameled wire 4 is pressed into the coating ring groove 901 of the felt sleeve 9, and the arc frame 2 is lifted upward until its upper arc wall fits into the bottom end wall of the fixed frame 5. At this time, the arc-shaped limiting sleeve 201 is fitted into the outer wall of the lower end of the felt sleeve 9;

[0053] Step 2: Oil dripping preparation: Before the oil dripping operation, press down the lifting platform 10, use the extended oil scraper assembly to insert it into the coating ring groove 901 through the annular opening slit 902, expand the upper end of the felt sleeve 9 to both sides to form an arc-shaped oil dripping area, and use the multi-head oil dripping pipe 12 to accurately supply oil to the arc-shaped oil dripping area;

[0054] Step 3: Coating work: The enameled wire 4 and the felt sleeve 9 move in the same direction with different speeds. The narrow slit scraper 14 and the narrow slit scraper 2 15 are used to evenly distribute the oil in a stepped manner to ensure that the lubricating oil is evenly distributed in the width direction of the felt belt. The rotation speed of the felt sleeve 9 is greater than the traction speed of the enameled wire 4. The "active chasing coating" mode is adopted to promote the migration of lubricating oil molecules to the surface of the enameled wire 4, forming discrete oil points and improving the coating uniformity.

[0055] In summary, this solution improves the traditional felt by combining a highly elastic annular rubber with a felt belt to form a felt sleeve 9 with an open outer edge. The enameled wire 4 to be treated is pressed into the coating annular groove 901 from the lower end of the felt sleeve 9. An extended oil scraping assembly is added to the top of the felt sleeve 9 to expand the top of the felt sleeve 9 in the non-contact portion with the enameled wire 4 to form an arc-shaped oil dripping area. In addition, a narrow slit scraper-type distribution structure composed of a narrow slit scraper 14 and a narrow slit scraper 2 15 is simultaneously used to ensure that the lubricating oil is initially evenly distributed in the width direction of the felt belt, thereby achieving precise oil control and uniform oil distribution.

[0056] A new lubricating oil coating process that combines "open rotary felt transfer oiling" with "drip oil supply" is used. The enameled wire 4 and the felt sleeve 9 rotate in the "same direction differential speed" mode to achieve "dynamic full-circle contact" between the enameled wire 4 and the felt sleeve 9, promote uniform transfer of the oil film, and effectively solve the pain points of uneven circumference and unstable oil quantity of traditional drip coating.

[0057] The above are only preferred specific implementation methods of the present invention; however, the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved conception of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A device for coating the surface of an enameled wire with lubricating oil, comprising a base (1) and guide rollers (3) mounted on both sides thereof and arranged to be lifted and lowered for guiding the enameled wire (4), characterized in that: A fixing frame (5) located in the middle of a pair of guide rollers (3) is fixedly mounted on the upper end of the base (1), and a plurality of felt rubber wheel assemblies distributed at equal intervals are rotatably mounted on the fixing frame (5) via a rotating shaft (6); The felt rubber wheel assembly comprises a rotating sleeve (7) fixedly sleeved on a rotating shaft (6), a rubber wheel (8) fixedly mounted on the rotating sleeve (7), a felt sleeve (9) fixedly sleeved on the outer edge wall of the rubber wheel (8), the felt sleeve (9) comprising a high-elasticity annular rubber fixedly mounted on the rubber wheel (8), a receiving cavity with an annular opening slit (902) on the outer circumferential wall of the high-elasticity annular rubber being provided inside, a felt belt extending to the annular opening slit (902) being covered in the receiving cavity, and a coating annular groove (901) for accommodating the enameled wire (4) to be pulled through is formed inside the felt belt; A lifting platform (10) is installed on the fixing frame (5) for lifting, and an oil tank (11) is installed on the lifting platform (10). A plurality of multi-head oil dripping pipes (12) corresponding to the positions of the felt sleeves (9) are distributed at the bottom of the oil tank (11). An oil scraping component for expanding the coating ring groove (901) is also slidably distributed at the bottom of the oil tank (11).

2. The device for coating the surface of an enameled wire with lubricating oil according to claim 1, characterized in that: The outer peripheries of the rubber wheel (8) and the rotating sleeve (7) are flush with the bottom end wall of the fixed frame (5), and the outer portion of the felt sleeve (9) protrudes outside the outer periphery of the rubber wheel (8).

3. The device for coating the surface of an enameled wire with lubricating oil according to claim 2, characterized in that: An arc-shaped frame (2) adapted to the fixed frame (5) is installed in a lifting manner at the middle position of the base (1), and a plurality of arc-shaped limiting sleeves (201) adapted to the felt sleeves (9) are embedded and installed on the inner wall of the arc-shaped frame (2).

4. The device for coating the surface of an enameled wire with lubricating oil according to claim 3, characterized in that: The bottom end wall of the fixed frame (5) and the upper end wall of the arc frame (2) are respectively in mutually adapted arc structures, and the upper end of the arc-shaped limiting sleeve (201) is provided with an arc-shaped tensioning groove adapted to the outer structure of the felt sleeve (9).

5. The device for coating the surface of an enameled wire with lubricating oil according to claim 1, characterized in that: The extended oil scraping assembly comprises a left extended structure and a right oil scraping structure distributed on the left and right sides of the multi-head oil dripping pipe (12); and a slide groove for the left extended structure and the right oil scraping structure to slide left and right and which is consistent with the axis of the guide roller (3) is opened on the left and right sides of the lifting platform (10).

6. The device for coating the surface of an enameled wire with lubricating oil according to claim 5, characterized in that: The left extension structure includes a left slide slidably mounted in the left slide groove, and a plurality of extension pieces (13) corresponding to the positions of the felt sleeve (9) are distributed at the bottom end of the left slide. The right oil scraping structure includes a right slide slidably mounted in the right slide groove, and a plurality of narrow slit scrapers (14) and narrow slit scrapers (15) corresponding to the positions of the felt sleeve (9) and distributed inside and outside are distributed at the bottom end of the right slide.

7. The device for coating the surface of an enameled wire with lubricating oil according to claim 6, characterized in that: The extension piece (13), the narrow slit scraper 1 (14) and the narrow slit scraper 2 (15) are all plug-ins with the same structure. The part of the plug-in extending to the inside of the coating ring groove (901) is an elliptical structure larger than the inner diameter of the initial coating ring groove (901). After the extension piece (13) and the narrow slit scraper 2 (15) slide to both sides respectively, the inside of the coating ring groove (901) is expanded to form an arc-shaped oil dripping area, and an oil gap is reserved between the outer edge of the narrow slit scraper 1 (14) and the inner wall of the arc-shaped oil dripping area.

8. A process for coating an enameled wire surface with lubricating oil, using the enameled wire surface lubricating oil coating device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1, preparation for laying out the wires: guide the multiple enameled wires (4) by the guide rollers (3) on the left and right sides, lift the guide rollers (3) upward until the enameled wires (4) are pressed into the felt sleeve (9), and lift the arc frame (2) upward until the arc-shaped limiting sleeve (201) is engaged with the outer wall of the felt sleeve (9) at the lower end; Step 2, oil dripping preparation: press down the lifting platform (10), use the extended oil scraping assembly to expand the upper part of the felt sleeve (9) to form an arc-shaped oil dripping area, and use the multi-head oil dripping pipe (12) to supply oil to the arc-shaped oil dripping area; Step 3: Coating: The enameled wire (4) and the felt sleeve (9) move in the same direction and at different speeds. Slit scraper 1 (14) and slit scraper 2 (15) are used to evenly distribute the oil in a stepped manner to ensure that the lubricating oil is evenly distributed in the width direction of the felt belt. The "active coating" mode is used to promote the migration of lubricating oil molecules to the surface of the enameled wire (4) with "dynamic full-circle contact".

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