Spool tension control system for transformer coil winding process

Abstract

The application discloses a tension control system of a pay-off reel of a transformer coil winding process, which comprises an enameled wire pay-off reel; a winding tension maintaining mechanism is arranged in the enameled wire pay-off reel; the winding tension maintaining mechanism forms resistance to passive rotation of the enameled wire pay-off reel, so that lead-out wires led out from the enameled wire coil on the enameled wire pay-off reel are always in a taut state under predetermined tension; the application has simple structure; the winding tension maintaining mechanism makes the lead-out wires led out from the enameled wire coil always in the taut state under the predetermined tension, so that the lead wires are tightly wound on a transformer coil framework.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of transformer process device. BACKGROUND

[0002] In the process of winding transformer, the main rotation of the transformer coil framework makes the lead wire gradually wound on the transformer coil framework, while the lead wire is passively rotated and unwound under the tension of the lead wire; if the unwinding disc is free to rotate, it will cause the lead wire to be in a relaxed state, and the coil wound on the transformer coil framework is also relaxed, while the actual process requires that the lead wire be tightly wound on the transformer coil framework, so a device is needed to make the lead wire always be in a tensioned state during winding. SUMMARY

[0003] The present application provides a winding disc tension control system for transformer coil winding process, which can make the lead wire always be in a tensioned state under a predetermined tension.

[0004] Technical scheme: To achieve the above-mentioned purpose, the winding disc tension control system for transformer coil winding process of the present application comprises a enameled wire unwinding disc; a winding tension maintaining mechanism is arranged in the enameled wire unwinding disc; the winding tension maintaining mechanism forms resistance to the passive rotation of the enameled wire unwinding disc, so that the lead wire drawn from the enameled wire coil on the enameled wire unwinding disc is always in a tensioned state under a predetermined tension.

[0005] Further, it further comprises a fixed disc; the enameled wire unwinding disc comprises an overrunning drum, two annular side plates are integrally arranged at both ends of the overrunning drum, and the enameled wire coil is wound in the annular groove between the two annular side plates; the winding tension maintaining mechanism is within the enclosing range of the overrunning drum; the outer ring of the fixed disc is coaxially rotatably connected with the inner wall of one end of the overrunning drum through a bearing.

[0006] Further, the winding tension maintaining mechanism comprises a closed-loop transmission belt; four belt synchronous wheels are arranged on the inner side of the closed-loop transmission belt, and the closed-loop transmission belt is tensioned into a parallelogram by the four belt synchronous wheels.

[0007] Further, the two belt synchronous wheels in the left-right direction are recorded as two a belt synchronous wheels, and the two belt synchronous wheels in the up-down direction are recorded as two b belt synchronous wheels; each a belt synchronous wheel is integrally connected with a gear in the same axis, the inner ring of the integrated structure of the a belt synchronous wheel and the gear is coaxially rotatably installed on the fixed shaft through an a bearing, and the fixed shaft is fixed on the fixed disc; further comprising a transmission gear body arranged in a circumferential array on the inner wall of the overrunning drum, and the two gears are in meshing transmission with the transmission gear body.

[0008] The segment of the closed-loop transmission belt crossing the a belt synchronous wheel is an a circular arc segment; the inner wall surface of the overrun winding drum is a ring-shaped sliding friction surface, and the a circular arc segment is within the range enclosed by the pitch circle of the gear, so that when the overrun winding drum rotates along the axis, the linear velocity of the ring-shaped sliding friction surface is greater than the linear velocity of the outer arc surface of the a circular arc segment; the segment of the closed-loop transmission belt crossing the b belt synchronous wheel is a b circular arc segment, and the outer arc surface of the b circular arc segment is in tangential sliding contact with the ring-shaped sliding friction surface.

[0009] Further, the shaft center of the fixed disc is fixed with a horizontal guide rod seat, and the inner ring of each b belt synchronous wheel is rotatably installed on the floating shaft through a b bearing.

[0010] Further, one end of the floating shaft is fixed on a vertical floating shaft support arm, and the side close to the guide rod seat of the floating shaft support arm is fixedly connected with a sliding block.

[0011] The upper side and the lower side of the guide rod seat are both provided with a pair of vertical guide rods, and the guide rod ends of the upper side and the lower side of the guide rod seat are respectively movably penetrated through the guide holes on the guide rod seat; the outer part of each guide rod is sleeved with a tension spring, and the two ends of the tension spring elastically abut against the guide rod seat and the sliding block, so that the two b belt synchronous wheels have a tendency to move away from each other under the action of the tension spring.

[0012] Further, under the elastic force of the tension spring, the b belt synchronous wheel abuts against the inner side of the circular arc of the b circular arc segment in the radial direction, so that the outer arc surface of the b circular arc segment is in tangential sliding contact with the ring-shaped sliding friction surface, and under the tension of the tension spring, a stable pressure is formed between the outer arc surface of the b circular arc segment and the ring-shaped sliding friction surface; so that the tangential position of the ring-shaped sliding friction surface and the outer arc surface of the b circular arc segment is consistent in the movement direction, and the linear velocity of the ring-shaped sliding friction surface always exceeds the linear velocity of the outer arc surface of the b circular arc segment in relative sliding.

[0013] Further, the inner ring surface of the closed-loop transmission belt is toothed.

[0014] Beneficial effects: The structure of the present application is simple, and the winding tension maintaining mechanism keeps the lead-out wire of the enameled wire coil in a taut state under a predetermined tension, so that the lead wire is tightly wound on the transformer coil framework.

[0015] This device uses a transmission relationship to ensure that the motion direction at the tangent point between the annular sliding friction surface and the outer arc surface of segment b is the same. Let the linear velocity of the annular sliding friction surface be V1, the linear velocity of the outer arc surface of segment b be V2, and the relative sliding velocity at the tangent point be V3, satisfying V3 = V1 - V2. Based on this relationship, with V1 remaining constant, the structural design process only needs to minimize the difference between the diameter of the outer arc surface of segment b and the pitch circle diameter of the gear (the difference cannot be zero). The goal is to reduce V3. A smaller V3 indicates a smaller relative sliding speed at the point where the annular sliding friction surface is tangent to the outer arc surface of segment b. This means that even if the wire feeding reel is rotating at high speed, the relative sliding speed at the point where the annular sliding friction surface is tangent to the outer arc surface of segment b is very small. Consequently, a smaller V3 means less sliding wear and heat generation on the closed-loop drive belt, thus solving the problems of excessive heat generation and wear. At the same time, the sliding resistance caused by the relative sliding at the point where the annular sliding friction surface is tangent to the outer arc surface of segment b serves to tighten the lead wire. Attached Figure Description

[0016] Appendix Figure 1 A schematic diagram of the overall structure of the enameled wire pay-off reel;

[0017] Appendix Figure 2 A three-dimensional sectional view of the enameled wire feeder;

[0018] Appendix Figure 3 This is a side view of the cross-section of the enameled wire pay-off reel;

[0019] Appendix Figure 4 For the appendix Figure 3 An enlarged view of mark 12;

[0020] Appendix Figure 5 This is a schematic diagram of the winding tension maintenance mechanism;

[0021] Appendix Figure 6 For the appendix Figure 5 The schematic diagram of the closed-loop transmission belt structure has been omitted. Detailed Implementation

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] As attached Figures 1 to 6The shown unwinding disc tension control system of transformer coil winding process comprises an enameled wire unwinding disc 1, an enameled wire coil 10 is wound on the enameled wire unwinding disc 1, and the end of a lead-out wire 11 led out from the enameled wire coil 10 is connected to a transformer coil former to be wound; the transformer coil former is installed on a rotating mechanism capable of being actively rotated, the active rotation of the transformer coil former causes the lead-out wire 11 led out from the enameled wire coil 10 to be gradually wound on the transformer coil former, and at the same time, the enameled wire coil 10 on the enameled wire unwinding disc 1 is passively unwound under the tension of the lead-out wire 11; the basic principle of the above winding coil is the existing structure, and the core structure of the device is as follows:

[0024] As shown in Figures 2 to 6 , the enameled wire unwinding disc 1 is provided with a winding tension maintaining mechanism, the winding tension maintaining mechanism forms resistance to the passive rotation of the enameled wire unwinding disc 1, so that the lead-out wire 11 led out from the enameled wire coil 10 is always in a taut state under a predetermined tension; further comprising a fixed support 9, the fixed support 9 is fixed with a transverse center shaft 7, and the center shaft 7 is fixedly provided with a fixed disc 8 coaxially; the enameled wire unwinding disc 1 comprises a freewheel 24, two annular side plates 2 are integrally arranged at both ends of the freewheel 24, and the enameled wire coil 10 is wound in an annular groove 4 between the two annular side plates 2; the winding tension maintaining mechanism is within the enclosing range of the freewheel 24; the outer ring of the fixed disc 8 is in coaxial rotation with the inner wall of one end of the freewheel 24 through a bearing 5;

[0025] As shown in Figure 2 , 3 , 4, 5, 6 the winding tension maintaining mechanism of the device comprises a closed-loop transmission belt 13, and the inner ring surface of the closed-loop transmission belt 13 is toothed 51; four belt synchronous wheels are distributed on the inner side of the closed-loop transmission belt 13, and the four belt synchronous wheels tension the closed-loop transmission belt 13 into a parallelogram; two a belt synchronous wheels 18 in the left and right directions are recorded as two a belt synchronous wheels 18, and two b belt synchronous wheels 14 in the up and down directions are recorded as two b belt synchronous wheels 14;

[0026] As shown in Figure 5 and 6 ; each a belt synchronous wheel 18 is integrally connected with a gear 19 coaxially, the inner ring of the integrated structure of the a belt synchronous wheel 18 and the gear 19 is coaxially and rotationally installed on a fixed shaft 22 through an a bearing 21, and the fixed shaft 22 is fixed on the fixed disc 8; further comprising a transmission tooth body 23 which is circumferentially arrayed on the inner wall of the freewheel 24, and both gears 19 are in meshing transmission with the transmission tooth body 23;

[0027] A horizontal guide rod seat 20 is fixed at the shaft center of the fixed disc 8, the inner ring of each b belt synchronous wheel 14 is rotatably installed on a floating shaft 27 through a b bearing 28, one end of the floating shaft 27 is fixed on a vertical floating shaft support arm 26, the floating shaft support arm 26 is fixedly connected with a sliding block 25 on the side close to the guide rod seat 20;

[0028] A pair of vertical guide rods 15 are arranged on the upper side and the lower side of the guide rod seat 20, the guide rods 15 on the upper side and the lower side of the guide rod seat 20 respectively movably pass through two guide holes 16 on the guide rod seat 20, a tension spring 17 is sleeved outside each guide rod 15, the two ends of the tension spring 17 elastically abut against the guide rod seat 20 and the sliding block 25, so that the two b belt synchronous wheels 14 have a tendency to move away from each other under the action of the tension spring 17; a circular arc segment 13a of the transmission belt 13 across the a belt synchronous wheel 18 is a transmission belt a circular arc segment 13a; the inner wall surface of the overrunning drum 24 is a ring-shaped sliding friction surface 24.1, and the a circular arc segment 13a is within the range enclosed by the index circle of the gear 19, so that when the overrunning drum 24 rotates along the axis, the linear velocity of the ring-shaped sliding friction surface 24.1 is greater than that of the outer arc surface of the a circular arc segment 13a;

[0029] As Figure 3 , a circular arc segment 13b of the transmission belt 13 across the b belt synchronous wheel 14 is a transmission belt b circular arc segment 13b, the linear velocity of the b circular arc segment 13b is the same as that of the a circular arc segment 13a; under the elastic force of the tension spring 17, the b belt synchronous wheel 14 abuts against the inner side of the circular arc of the transmission belt b circular arc segment 13b in the radial direction, so that the outer arc surface 013 of the b circular arc segment 13b is in tangential sliding with the ring-shaped sliding friction surface 24.1, and under the tension of the tension spring 17, a stable pressure is formed between the outer arc surface 013 of the b circular arc segment 13b and the ring-shaped sliding friction surface 24.1; so that the tangential position of the ring-shaped sliding friction surface 24.1 and the outer arc surface 013 of the b circular arc segment 13b is consistent in the direction of movement, and the linear velocity of the ring-shaped sliding friction surface 24.1 always exceeds the linear velocity of the outer arc surface 013 of the b circular arc segment 13b in the sliding friction, thereby generating a stable resistance to the rotation of the overrunning drum 24, and the specific resistance to the rotation of the overrunning drum 24 can be realized by adjusting / designing the elastic force of the tension spring 17.

[0030] Working principle:

[0031] The end of the outgoing wire 11 led out by the enameled wire coil 10 is connected to the transformer coil frame to be wound, the rotating device drives the transformer coil frame to rotate actively, so that the outgoing wire 11 led out by the enameled wire coil 10 is gradually wound on the transformer coil frame, and the enameled wire coil 10 following the rotation of the enameled wire reel 1 continuously unwinds under the tension of the outgoing wire 11;

[0032] The overrunning drum 24 rotates along the axis during the rotation of the enameled wire reel 1, and drives the a belt synchronous wheel 18 under the meshing transmission, and then drives the closed-loop transmission belt 13 in the surrounding range of the overrunning drum 24 along the parallelogram contour path of itself, since the a circular arc segment 13a is in the surrounding range of the index circle of the gear 19, the linear speed of the annular sliding friction surface 24.1 is greater than that of the outer arc surface of the a circular arc segment 13a under the meshing transmission, since the a circular arc segment 13a and the b circular arc segment 13b are on the same closed-loop transmission belt 13, the linear speed of the a circular arc segment 13a and the b circular arc segment 13b is always the same;

[0033] Under the elastic force of the tension spring 17, the b belt synchronous wheel 14 presses the circular arc inside of the transmission belt b circular arc segment 13b in the radial direction, so that the outer arc surface 013 of the b circular arc segment 13b is tangent to the annular sliding friction surface 24.1, and under the tension of the tension spring 17, a stable pressure is formed between the outer arc surface 013 of the b circular arc segment 13b and the annular sliding friction surface 24.1, so that the movement direction of the tangent place of the annular sliding friction surface 24.1 and the outer arc surface 013 of the b circular arc segment 13b is consistent, and the linear speed of the annular sliding friction surface 24.1 always exceeds the sliding friction of the linear speed of the outer arc surface 013 of the b circular arc segment 13b, thereby generating a stable resistance to the rotation of the overrunning drum 24, and thereby the passive rotation of the enameled wire reel 1 encounters a stable resistance, so that the lead-out wire 11 drawn out by the enameled wire reel 10 is always in a taut state under a predetermined tension, thereby making the lead-out wire 11 more tightly and stably wound on the transformer coil framework;

[0034] Since the movement direction of the tangent place of the annular sliding friction surface 24.1 and the outer arc surface 013 of the b circular arc segment 13b is consistent, the linear speed of the annular sliding friction surface 24.1 is V1, the linear speed of the outer arc surface 013 of the b circular arc segment 13b is V2, and the relative sliding speed of the tangent place of the annular sliding friction surface 24.1 and the outer arc surface 013 of the b circular arc segment 13b is V3, which satisfies V3=V1-V2, based on the above quantity relationship, in the process of structural design, only the difference between the diameter of the a circular arc segment 13a and the diameter of the index circle of the gear 19 needs to be minimized (the difference cannot be zero) to achieve the purpose of reducing V3, the smaller V3 is, the smaller the relative sliding speed of the tangent place of the annular sliding friction surface 24.1 and the outer arc surface 013 of the b circular arc segment 13b is, so even if the enameled wire reel 1 is in a high-speed rotating state, the relative sliding speed of the tangent place of the annular sliding friction surface 24.1 and the outer arc surface 013 of the b circular arc segment 13b is very small, thereby indicating that the smaller V3 is, the smaller the sliding wear and heat of the closed-loop transmission belt 13 is, thereby simultaneously solving the problems of excessive heat and wear, at the same time, the sliding resistance brought by the relative sliding of the tangent place of the annular sliding friction surface 24.1 and the outer arc surface 013 of the b circular arc segment 13b plays the purpose of tightening the lead-out wire 11.

[0035] The above merely describes the preferred embodiments of the present application, and it should be pointed out that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as falling within the protection scope of the present application.

Claims

1. A tension control system for the pay-off reel in a transformer coil winding process, characterized in that: Includes an enameled wire pay-off reel (1); the enameled wire pay-off reel (1) is provided with a winding tension maintaining mechanism, which resists the passive rotation of the enameled wire pay-off reel (1), so that the lead wire (11) drawn from the enameled wire coil (10) on the enameled wire pay-off reel (1) is always in a taut state under a predetermined tension. It also includes a fixed plate (8); the enameled wire unwinding plate (1) includes an overwind drum (24), and two annular side plates (2) are integrally provided at both ends of the overwind drum (24), and the enameled wire coil (10) is wound in the annular groove (4) between the two annular side plates (2); the outer ring of the fixed plate (8) is coaxially rotated with the inner wall of one end of the overwind drum (24) through a bearing (5), and the winding tension maintaining mechanism is within the enclosure of the overwind drum (24); The winding tension maintaining mechanism includes a closed-loop drive belt (13); four belt synchronous pulleys are distributed on the inner side of the closed-loop drive belt (13), which tension the closed-loop drive belt (13) into a parallelogram. The two belt pulleys in the left and right directions are designated as two a belt pulleys (18), and the two belt pulleys in the up and down directions are designated as two b belt pulleys (14). Each a belt pulley (18) is coaxially and integrally connected with a gear (19). The inner ring of the integrated structure formed by the a belt pulley (18) and the gear (19) is coaxially and rotatably mounted on the fixed shaft (22) through the a bearing (21). The fixed shaft (22) is fixed on the fixed disk (8). It also includes a transmission gear body (23) arranged in a circumferential array on the inner wall of the overpass drum (24). Both gears (19) mesh with the transmission gear body (23) for transmission. The section of the closed-loop transmission belt (13) that crosses the synchronous pulley (18) of belt a is the a-arc segment (13a) of the transmission belt; the inner wall surface of the overrunning drum (24) is the annular sliding friction surface (24.1), and the a-arc segment (13a) is within the range enclosed by the pitch circle of the gear (19), so that when the overrunning drum (24) rotates along the axis, the linear velocity of the annular sliding friction surface (24.1) is greater than the linear velocity of the outer arc surface of the a-arc segment (13a); the section of the closed-loop transmission belt (13) that crosses the synchronous pulley (14) of belt b is the b-arc segment (13b), and the outer arc surface (013) of the b-arc segment (13b) is tangential to the annular sliding friction surface (24.1).

2. The tension control system for the wire feeding reel in the transformer coil winding process according to claim 1, characterized in that: A horizontal guide rod seat (20) is fixed at the center of the fixed disk (8), and the inner rings of each b belt synchronous pulley (14) are rotatably mounted on the floating shaft (27) through b bearings (28).

3. The tension control system for the pay-off reel in the transformer coil winding process according to claim 2, characterized in that: One end of the floating shaft (27) is fixed to the vertical floating shaft support arm (26), and a slider (25) is fixedly connected to the side of the floating shaft support arm (26) near the guide rod seat (20); A pair of vertical guide rods (15) are provided on the upper and lower sides of the guide rod seat (20). The ends of the guide rods (15) on the upper and lower sides of the guide rod seat (20) respectively move through the guide holes (16) on the two guide rod seats (20). Each guide rod (15) is fitted with a tension spring (17). The two ends of the tension spring (17) elastically press against the guide rod seat (20) and the slider (25), so that the two b-belt synchronous pulleys (14) tend to move away from each other under the action of the tension spring (17).

4. The tension control system for the pay-off reel in the transformer coil winding process according to claim 3, characterized in that: Under the elastic force of the tension spring (17), the synchronous pulley (14) of the b belt presses against the inner side of the arc of the transmission belt b arc segment (13b) in the radial direction, so that the outer arc surface (013) of the b arc segment (13b) slides tangentially with the annular sliding friction surface (24.1), and under the tension of the tension spring (17), a stable pressure is formed between the outer arc surface (013) of the b arc segment (13b) and the annular sliding friction surface (24.1); thus, the movement direction of the tangent point between the annular sliding friction surface (24.1) and the outer arc surface (013) of the b arc segment (13b) is consistent, and the linear velocity of the annular sliding friction surface (24.1) always exceeds the linear velocity of the outer arc surface (013) of the b arc segment (13b) for relative sliding.

5. The tension control system for the pay-off reel in the transformer coil winding process according to claim 4, characterized in that: The inner ring surface of the closed-loop drive belt (13) has teeth (51).

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