A constant tension wire-releasing brake device and its use method

Abstract

The present invention relates to a constant tension wire-release brake device and a method for using the same, and belongs to the technical field of enameled winding wire production for large power transformers. The technical solution of the present invention is: a height-adjustable support column (2) is provided with more than one position hole, and a twistable nut (4) is arranged in the position hole of the height-adjustable support column (2); one end of the adjusting screw (5) is connected to the twistable nut (4) through a thread, and the other end of the adjusting screw (5) is open, and a slideway connected to the opening is arranged inside, and one end of the slide bar (7) is slidably arranged in the slideway, and the other end of the slide bar is hinged to the brake rod (8), and the spring (6) is sleeved on the outside of the adjusting screw and the slide rod; the brake pad (10) is arranged at the top of the brake rod, the tops of the two connecting rods are hinged to the brake rod, and the bottoms of the two connecting rods are hinged to the base (1). The present invention does not require an air compressor to provide compressed air, and at the same time, the precision requirements for the wire-release spool tooling are not high, saving a lot of expenses.

Description

Technical Field

[0001] The invention relates to a constant tension wire-paying brake device and a use method thereof, belonging to the technical field of production of enameled winding wires for large power transformers. Background Art

[0002] The enameled wire used for transformer windings is generally made by annealing copper or aluminum conductors of certain specifications, then coating them with insulating paint, and then drying and heating to crosslink and solidify the insulating paint. At present, the manufacturing process of enameled wire is relatively mature. Most of the bare wires used in the manufacture of enameled wires are made by extrusion or wire drawing. The painting process requires that the bare wire should be a soft wire, among which the bare wire of the extrusion process is a soft wire itself, and the wire drawing bare wire must be annealed before painting to turn the hard wire into a soft wire. Because the bare wire is soft when painting, it is easy to shrink when the tension is large. When the bare wire wound on the bobbin is pulled into the annealing, painting and other process equipment by the traction wire take-up machine, if the wire is not released steadily and the tension fluctuates, it is very easy to cause the bare wire to shrink and shake, especially when producing high yield strength enameled wires, the size changes are greater, and even wire breakage. Due to the unstable wire release tension, the paint thickness is uneven and cannot meet the process requirements. Therefore, unstable wire release tension will greatly increase the scrap rate and seriously affect product quality. At present, in the field of constant tension wire-paying in China, the pneumatic brake wire-paying device requires an air compressor to provide an uninterrupted and stable air source, which consumes a lot of energy. The brake wire-paying device has very high technical requirements for the wire shaft and needs dynamic balancing, which results in huge purchase and maintenance costs. Summary of the invention

[0003] The purpose of the present invention is to provide a constant tension wire-paying brake device and a method of using the same. By using a tension adjustment mechanism comprising a spring, the friction force on the brake drum can be kept continuously stable, so that the tension of the wire pay-off can be kept stable; a height adjustment function is provided, which can adapt to wire-paying tooling for spools of various specifications, and has the advantages of strong stability, low cost, simple operation, energy saving and environmental protection, and convenient maintenance. An air compressor is not required to provide compressed air, and at the same time, the precision requirements for the wire-paying spool tooling are not high, which saves a lot of expenses. The effect is remarkable in actual application, the manufacturing process level and product quality of the enameled wire have been greatly improved, the scrap rate has been significantly reduced, and the above-mentioned problems existing in the background technology have been effectively solved.

[0004] The technical solution of the present invention is:

[0005] A constant tension wire-releasing brake device comprises a base, a height-adjustable support column, a twistable nut, a brake rod, a parallel double link, a brake pad and a tension adjustment mechanism, wherein the height-adjustable support column is arranged on the base, the height-adjustable support column is provided with more than one position hole, and the twistable nut is arranged in the position hole of the height-adjustable support column; the tension adjustment mechanism comprises an adjusting screw, a spring and a sliding rod, one end of the adjusting screw is connected to the twistable nut through a thread, the other end of the adjusting screw is open, a slideway connected to the opening is arranged inside, one end of the sliding rod is slidably arranged in the slideway, the other end of the sliding rod is hinged to the brake rod, and the spring sleeve is arranged on the outside of the adjusting screw and the sliding rod; the brake pad is arranged at the top end of the brake rod, the parallel double link consists of two connecting rods, the two connecting rods are arranged in parallel, the tops of the two connecting rods are hinged to the brake rod, and the bottoms of the two connecting rods are hinged to the base.

[0006] An adjusting hand wheel is arranged at one end of the adjusting screw rod away from the sliding rod.

[0007] The slide bar is hinged to the brake rod through a pin.

[0008] The upper and lower ends of the parallel double connecting rods are respectively hinged to the brake rod and the base through pin 2.

[0009] The twistable nut is composed of a rotating rod and a nut that are fixedly connected. The adjusting screw is threadedly connected in the nut. The rotating rod is inserted into the position hole of the height-adjustable supporting column, and the twistable nut can rotate on the position hole.

[0010] One end of the adjusting screw is a screw, and the other end is a smooth rod, a slideway is provided inside the smooth rod, and a spring baffle plate 1 is provided outside the smooth rod; one end of the slide rod is slidably arranged in the slideway at the end of the smooth rod, and the other end is hinged to the tail end of the brake rod, and a spring baffle plate 2 is provided on the slide rod; the spring sleeve is arranged on the outside of the smooth rod and the slide rod, one end is fixed on the spring baffle plate 1, and the other end is fixed on the spring baffle plate 2, and the slide rod can slide in the smooth rod, thereby compressing the spring.

[0011] The end of the brake pad is arc-shaped and matches the brake drum on the pneumatic brake line-release device.

[0012] A method for using a constant tension wire-releasing brake device adopts the above-mentioned wire-releasing brake device, and the steps are as follows: ① an adjusting screw rod cooperates with a twistable nut to adjust the size of the spring elastic force, the elastic force of the spring acts on the brake rod through a slide rod, a brake pad is arranged on the top of the brake rod, and the brake pad contacts and rubs with the surface of the brake drum on the pneumatic brake wire-releasing device to realize tension control of the wire-releasing shaft; ② a parallel double connecting rod is arranged at the lower part of the brake rod, so as to ensure that the pressure direction of the brake rod acting on the brake drum remains unchanged; ③ if the brake drum is not round or not concentric, the brake pad is driven by the reaction force to move the brake rod during rotation, and the brake rod swings backward with the parallel double connecting rod, at which time the slide rod slides into the adjusting screw rod, the spring contracts, and the brake is prevented from locking, and when a gap is about to appear between the brake drum and the brake pad, the spring pushes the brake rod, so that the friction force of the brake pad acting on the brake drum remains unchanged, thereby achieving the purpose of stable wire-releasing.

[0013] The beneficial effects of the present invention are as follows: by using a tension adjustment mechanism including a spring, the friction force on the brake drum can be kept continuously stable, so that the tension of the wire pay-off can be kept stable; a wire pay-off tooling with a height adjustment function is provided, which can adapt to spools of various specifications, has the advantages of strong stability, low cost, simple operation, energy saving and environmental protection, and convenient maintenance. An air compressor is not required to provide compressed air, and at the same time, the precision requirements of the wire pay-off spool tooling are not high, which saves a lot of expenses. The effect is remarkable in actual application, the manufacturing process level and product quality of the enameled wire are greatly improved, and the scrap rate is significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 is a front perspective view of the present invention;

[0016] Figure 3 is a rear perspective view of the present invention;

[0017] In the figure: base 1, height-adjustable supporting column 2, adjusting hand wheel 3, twistable nut 4, adjusting screw 5, spring 6, sliding rod 7, brake rod 8, parallel double connecting rod 9, brake pad 10, pin one 11, pin two 12. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] A constant tension wire-releasing brake device comprises a base 1, a height-adjustable support column 2, a twistable nut 4, a brake rod 8, a parallel double link 9, a brake pad 10 and a tension adjustment mechanism, wherein the height-adjustable support column 2 is arranged on the base 1, the height-adjustable support column 2 is provided with more than one position hole, and the twistable nut 4 is arranged in the position hole of the height-adjustable support column 2; the tension adjustment mechanism comprises an adjusting screw 5, a spring 6 and a sliding rod 7, one end of the adjusting screw 5 is connected to the twistable nut 4 through a thread, the other end of the adjusting screw 5 is open, and a slideway connected to the opening is arranged inside, one end of the sliding rod 7 is slidably arranged in the slideway, and the other end of the sliding rod 7 is hinged to the brake rod 8, and the spring 6 is sleeved on the outside of the adjusting screw 5 and the sliding rod 7; the brake pad 10 is arranged at the top end of the brake rod 8, the parallel double link 9 is composed of two connecting rods, the two connecting rods are arranged in parallel, the tops of the two connecting rods are hinged to the brake rod 8, and the bottoms of the two connecting rods are hinged to the base 1.

[0020] An adjusting hand wheel 3 is disposed at one end of the adjusting screw rod 5 away from the sliding rod 7 .

[0021] The slide bar 7 and the brake bar 8 are hinged via a pin 11.

[0022] The upper and lower ends of the parallel double connecting rod 9 are respectively hinged to the brake lever 8 and the base 1 through the second pin 12.

[0023] The twistable nut 4 is composed of a fixedly connected rotating rod and a nut, the adjusting screw 5 is threadedly connected in the nut, and the rotating rod is inserted into the position hole of the height-adjustable supporting column 2.

[0024] One end of the adjusting screw 5 is a screw, and the other end is a smooth rod, a slideway is provided inside the smooth rod, and a spring baffle plate 1 is provided outside the smooth rod; one end of the slide rod 7 is slidably set in the slideway at the end of the smooth rod, and the other end is hinged to the tail end of the brake rod 8, and a spring baffle plate 2 is provided on the slide rod 7; the spring 6 is sleeved on the outside of the smooth rod and the slide rod 7, one end is fixed on the spring baffle plate 1, and the other end is fixed on the spring baffle plate 2.

[0025] The end of the brake pad 10 is arc-shaped and matches the brake drum on the pneumatic brake line-release device.

[0026] A method for using a constant tension wire-releasing brake device, using the above-mentioned wire-releasing brake device, the steps are as follows: ① the adjusting screw 5 cooperates with the twistable nut 4 to adjust the size of the spring elastic force, the elastic force of the spring acts on the brake rod through a slide rod, a brake pad is arranged on the top of the brake rod, the brake pad contacts and rubs with the surface of the brake drum on the pneumatic brake wire-releasing device to realize the tension control of the wire-releasing shaft; ② the parallel double connecting rod 9 is arranged at the lower part of the brake rod, to ensure that the pressure direction of the brake rod acting on the brake drum remains unchanged; ③ if the brake drum is not round or not concentric, the brake pad 10 is driven by the reaction force to move the brake rod 8 during rotation, and the brake rod 8 swings backward with the parallel double connecting rod 9, at this time the slide rod 7 slides into the adjusting screw 5, the spring contracts, to avoid the brake locking, when the brake drum and the brake pad are about to have a gap, the spring pushes the brake rod, so that the friction force of the brake pad acting on the brake drum remains unchanged, thereby achieving the purpose of stable wire-releasing.

[0027] In practical applications, the brake pads continuously rub the brake drum on the pay-off stand to control the pay-off tension. To ensure that the friction force is continuous and basically constant, the present invention utilizes the elastic principle of the spring to design a tension adjustment mechanism. The pay-off tension can be adjusted by rotating the adjustment screw. Since the spring is constantly compressed, the friction force exerted by the brake pads on the brake drum is continuous. Even if the brake drum is not round or concentric, the brake pads are in continuous contact with the surface of the brake drum, and the friction force is always maintained. If the pay-off shaft with the bare wire wound around it has poor dynamic balance, the pay-off will be fast and slow, and the bare wire may even be broken. The present invention can keep the friction force on the brake drum continuous and stable, so that the pay-off tension remains stable. The present invention also provides a pay-off tool with a height adjustment function that can adapt to spools of various specifications.

[0028] A height-adjustable support column 2 is set on the base 1 and a hole (position hole) is punched on it for installing a twistable nut 4. The adjusting screw 5 cooperates with the twistable nut 4 to adjust the elastic force of the spring 6. The elastic force of the spring acts on the brake rod 8 through the slide rod 7. The top of the brake rod 8 is provided with a brake pad 10. The brake pad 10 here contacts and rubs with the surface of the brake drum on the pneumatic brake release device to control the tension of the release shaft. The two parallel double connecting rods 9 connected to the brake rod 8 are to ensure that the pressure direction of the brake rod 8 on the brake drum remains unchanged.

[0029] If the brake drum is not concentric, the brake pad will be subjected to the reaction force to push the spring 6 during rotation, and the spring 6 will contract to prevent the brake from locking. When a gap is about to appear between the wheel hub and the brake pad 10, the spring 6 will push the brake lever 8 to keep the friction force of the brake pad 10 on the brake drum unchanged, thereby achieving the purpose of stable line release.

[0030] If the dynamic balance of the spool is not good, the rotation speed of the spool wrapped with bare wire will be fast or slow when the wire is released, and the tension will be large or small, causing the wire to suddenly sag or tighten, thereby causing the wire to shrink or break. Since the brake lever 8 is pushed by the spring 6, it always maintains a relatively constant brake friction force, which will avoid the occurrence of the above problems.

Claims

1. A constant tension wire-paying brake device, Features: The invention comprises a base (1), a height-adjustable support column (2), a twistable nut (4), a brake rod (8), a parallel double link (9), a brake pad (10) and a tension adjustment mechanism, wherein the height-adjustable support column (2) is arranged on the base (1), the height-adjustable support column (2) is provided with more than one position hole, and the twistable nut (4) is arranged in the position hole of the height-adjustable support column (2); the tension adjustment mechanism comprises an adjusting screw (5), a spring (6) and a slide rod (7), one end of the adjusting screw (5) is connected to the twistable nut (4) through a thread, the other end of the adjusting screw (5) is open, and a slideway connected to the opening is arranged inside, one end of the slide rod (7) is slidably arranged in the slideway, and the other end of the slide rod (7) is hinged to the brake rod (8), and the spring (6) is sleeved on the outside of the adjusting screw (5) and the slide rod (7); the brake pad (10) is arranged on the top of the brake rod (8), and the parallel double link (9) is composed of two links. The two connecting rods are arranged in parallel, the tops of the two connecting rods are hinged to the brake rod (8), and the bottoms of the two connecting rods are hinged to the base (1); the end of the adjusting screw (5) away from the sliding rod (7) is provided with an adjusting hand wheel (3); the twistable nut (4) is composed of a fixedly connected rotating rod and a nut, the adjusting screw (5) is threadedly connected in the nut, and the rotating rod is inserted into the position hole of the height-adjustable supporting column (2); one end of the adjusting screw (5) is a screw, and the other end is a The end is a bare rod, a slideway is provided inside the bare rod, and a spring baffle plate 1 is provided outside the bare rod; one end of the slide rod (7) is slidably arranged in the slideway of the bare rod end, and the other end is hinged to the rear end of the brake rod (8), and a spring baffle plate 2 is provided on the slide rod (7); the spring (6) is sleeved on the outside of the bare rod and the slide rod (7), one end is fixed on the spring baffle plate 1, and the other end is fixed on the spring baffle plate 2; the end of the brake pad (10) is arc-shaped and matches the brake drum on the pneumatic brake release device; The adjusting screw (5) cooperates with the twistable nut (4) to adjust the elastic force of the spring (6). The elastic force of the spring (6) acts on the brake rod (8) through the slide rod (7). A brake pad (10) is provided at the top of the brake rod (8). The brake pad (10) contacts and rubs against the surface of the brake drum on the pneumatic brake wire-releasing device to control the tension of the wire-releasing shaft. The parallel double connecting rod (9) is arranged at the lower part of the brake rod (8) to ensure that the pressure direction of the brake rod (8) on the brake drum remains unchanged. If the brake drum is not round or not concentric, the brake pad (10) is driven by the reaction force to move the brake rod (8) during rotation. The brake rod (8) swings backward following the parallel double connecting rod (9). At this time, the slide rod (7) slides into the adjusting screw (5), and the spring contracts to avoid the brake locking. When a gap is about to appear between the brake drum and the brake pad (10), the spring pushes the brake rod (8) so that the friction force of the brake pad (10) on the brake drum remains unchanged, thereby achieving the purpose of stable wire-releasing.

2. A constant tension wire-paying brake device according to claim 1, Features: The slide bar (7) and the brake bar (8) are hingedly connected via a pin 1 (11).

3. A constant tension wire-releasing brake device according to claim 1, Features: The upper and lower ends of the parallel double connecting rod (9) are respectively hinged to the brake rod (8) and the base (1) via a second pin (12).

Images