A flat winding die for integral winding of a turbogenerator rotor coil

Abstract

The present invention discloses a flat winding die for integral winding of a rotor coil of a steam turbine generator, which comprises two oppositely arranged connecting plates (1), on which a middle frame (2) is movably fixed. On the left and right outer sides of the middle frame (2), a left frame (3) and a right frame (4) are respectively arranged, and the left frame (3) and the right frame (4) are respectively movably fixed on the connecting plates (1). At the left end of the left frame (3) and the right end of the right frame (4), there are V-shaped irons (5), and the openings of the V-shaped irons (5) abut against the two connecting plates (1); a plurality of stepped grooves are formed on the outer sides of the two inclined surfaces of the V-shaped iron (5); on the two connecting plates (1) and at the outer ends of the left frame (3) and the right frame (4), fastening components are respectively arranged. The present invention has the advantage of eliminating the cumulative tolerance in the manufacturing and assembly processes of each group of die pieces and clamping pieces.

Description

Technical Field

[0001] The present invention relates to the technical field of coil flat winding dies, and particularly to an integral flat winding die for a turbine generator rotor coil. Background Art

[0002] As a core component of a generator, the manufacturing process of a turbine generator rotor coil is very crucial. Generally, a turbine generator has 7 groups of rotor wires, and the dimensional requirements for each group of rotor wires are high. Especially for the integral winding type, the width dimension tolerance is ±0.5 mm. If the size of one group of wires or some turns in one group of wires exceeds the tolerance, and there are 24 turns in one group of wires, it will not only be very difficult to insert the rotor wires in the subsequent process, but also likely squeeze and break the slot insulation in the rotor slot, posing a safety hazard to the overall operation of the motor.

[0003] Currently, the end part of the integral flat winding die is assembled by V-shaped irons, die plates, and clamping pieces. Each group of wires corresponds to a group of V-shaped irons, die plates, and clamping pieces. 7 groups of rotor wires correspond to 7 groups of V-shaped irons, die plates, and clamping pieces. The two sides of the V-shaped iron are inclined planes, and the assembly surface between the die plate and the V-shaped iron is also an inclined plane. The deficiencies of this V-shaped iron with inclined planes on both sides are as follows: (1) After the flat winding die is assembled each time, the size of each turn is measured. If the size of one turn exceeds the tolerance, the assembly heights of all the die plates and clamping pieces at the end part must be adjusted;

[0004] [[ID=...]](2)The cumulative tolerance during the manufacturing and assembly processes of each group of die plates and clamping pieces is difficult to eliminate;

[0005] (3)The required number of die plates and clamping pieces is large (672 die plates and 700 clamping pieces), resulting in high manufacturing costs.

[0006] In CN202021111398.3, a rotor coil flat winding die without thickening is disclosed, which includes a working platform, a rotating platform, a circular module, an upper pressing head, a wire feeding mechanism, a lateral positioning mechanism, and a control device; the left end of the rotating platform is hinged to the working platform, the circular module is detachably fixed on the upper surface of the left end of the rotating platform, and the axis of the circular module coincides with the hinge point of the rotating platform and the working platform; the upper pressing head is detachably fixed above the circular module, and the size of the upper pressing head is larger than that of the circular module; the lateral positioning mechanism is fixed on the working platform, faces the circular module and cooperates with the circular module, and there is a gap for the coil to pass through between the lateral positioning mechanism and the circular module; the wire feeding mechanism is fixed on the working platform and faces the gap; the control device is communicatively connected to the lateral positioning mechanism and the wire feeding mechanism. The patent can increase the uniformity of the coil, improve the problem of coil turn-to-turn short circuit, and improve the insulation quality of the flat winding and the overall hot-pressed coil, but it cannot solve the assembly problem of the die plates and clamping pieces.

[0007] In patent CN201820608378.3, a rotor coil forming die is disclosed, which includes an upper die and a lower die. A square-shaped positioning block protrudes from the lower die. One end of the positioning block is a triangular bending wall. The lower die is provided with positioning steps on both sides of the positioning block. Arc-shaped positioning grooves are provided at positions on the positioning steps close to the side wall of the forming block. The lower die is provided with a "V"-shaped bending and forming step along the bending wall of the positioning block. A butting convex edge is provided at the middle position of the butting of the bending and forming step. The upper die is provided with a number of pressing blocks. The pressing blocks are arranged to enclose a fitting groove matching the positioning block. Pressing grooves corresponding to the positioning grooves are provided on the pressing blocks. An inverted "V"-shaped top pressing step is provided on one side of the upper die. A butting concave edge corresponding to the butting convex edge is provided on the top pressing step. After the positioning block is inserted into the pressing groove, the top pressing step and the bending and forming step are arranged at intervals. This patent achieves the technical effect of reliable and convenient forming, thereby improving production efficiency, but this die cannot adapt to products of different models. Summary of the Invention

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a flat winding die for integral winding of a rotor coil of a steam turbine generator, so as to solve the above defects.

[0009] The purpose of the present invention is achieved through the following technical solutions: A flat winding die for integral winding of a rotor coil of a steam turbine generator, including:

[0010] Two oppositely arranged connecting plates, on which a middle frame is movably fixed. A left frame and a right frame are respectively arranged on the left and right outer sides of the middle frame. The left frame and the right frame are respectively movably fixed on the connecting plates. V-shaped irons are arranged at the left end of the left frame and the right end of the right frame. The openings of the V-shaped irons abut against the two connecting plates; A number of stepped grooves are opened on the outer sides of the two inclined surfaces of the V-shaped iron; Fastening components are respectively arranged on the two connecting plates and at the outer ends of the left frame and the right frame.

[0011] Further, a clamping piece and a die piece are placed in each stepped groove. A number of the die pieces and a number of the clamping pieces are placed alternately. The thicknesses of the clamping piece and the die piece are the same as the height of the stepped groove. The left end of the left frame and the right end of the right frame are used to limit the clamping piece.

[0012] Further, a first T-shaped groove, a second T-shaped groove, a third T-shaped groove, and a fourth T-shaped groove are successively opened on the upper sides of the two connecting plates from the inside to the outside. A first fastener is slidably arranged in the first T-shaped groove. The upper end of the first fastener penetrates through the middle frame and is fixed by a first nut.

[0013] Further, a number of strip-shaped grooves are opened on the middle frame. The upper end of the first fastener is located in the strip-shaped grooves.

[0014] Further, a second fastener and a third fastener are respectively and slidably disposed in the second T-shaped groove and the third T-shaped groove. The upper end of the second fastener penetrates through the left frame and is fixed by a second nut. The upper end of the third fastener penetrates through the right frame and is fixed by a third nut.

[0015] Further, the fastening assembly includes two fourth fasteners slidably disposed in a fourth T-shaped groove. The upper ends of the fourth fasteners penetrate through a plurality of clamping pieces and die pieces and respectively penetrate through a pressing piece. A fourth nut is also screwed on the fourth fastener. The pressing piece is used to press a plurality of clamping pieces and die pieces.

[0016] Furthermore, a pressing plate is disposed on the upper sides of the two pressing pieces. A fifth fastener is also slidably disposed in the fourth T-shaped groove. The upper end of the fifth fastener sequentially penetrates through a plurality of clamping pieces, a plurality of die pieces and the pressing plate and is fixed by a fifth nut.

[0017] Furthermore, a base is fixed to the lower sides of the two connecting plates by bolts.

[0018] Advantages of the present invention: The assembled flat winding die for the integral winding of the rotor coil of the steam turbine generator proposed by the present invention is convenient to assemble, and the assembled dimensions are easy to guarantee; the flat winding die defines the installation positions of the die pieces and the clamping pieces through the V-shaped iron step reference surface, eliminating the cumulative tolerances of the die pieces and the clamping pieces during the manufacturing and assembly processes; during the assembly process of the flat winding die, the die pieces and the clamping pieces of each turn do not affect each other; by improving the V-shaped iron inclined surface into a stepped shape and replacing the middle V-shaped iron of each group of rotor wires, one group of die pieces and clamping pieces can be correspondingly wound with 2 to 3 groups of rotor wires, thereby reducing the input quantity of the die pieces and the clamping pieces and lowering the manufacturing cost of the product. Description of the Drawings

[0019] Figure 1 is the top view of the present invention; Figure 2 is the sectional view of the present invention;

[0020] Figure 3 is the sectional view of the present invention;

[0021] Figure 4 is the usage state diagram of the V-shaped iron, the die piece and the clamping piece.

[0022] In the figure, 1 - connecting plate, 2 - middle frame, 3 - left frame, 4 - right frame, 5 - V-shaped iron, 6 - clamping piece, 7 - die piece, 8 - first T-shaped groove, 9 - second T-shaped groove, 10 - third T-shaped groove, 11 - fourth T-shaped groove, 12 - first fastener, 13 - second fastener, 14 - third fastener, 15 - fourth fastener, 16 - pressing piece, 17 - pressing plate, 18 - fifth fastener, 19 - base, 21 - base sleeve, 211 - relief groove, 22 - bottom plate, 23 - mounting plate. Detailed implementation mode

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0024] Embodiment 1. In this embodiment, as Figures 1 to 4 shown, a flat winding die for integral winding of a turbogenerator rotor coil includes two oppositely arranged connecting plates 1, a middle frame 2 is movably fixed on the two connecting plates 1, a left frame 3 and a right frame 4 are respectively arranged on the left and right outer sides of the middle frame 2, the left frame 3 and the right frame 4 are respectively movably fixed on the connecting plates 1, V-shaped irons 5 are arranged at the left end of the left frame 3 and the right end of the right frame 4, and the openings of the V-shaped irons 5 abut against the two connecting plates 1; a plurality of stepped grooves are formed on the outer sides of the two inclined surfaces of the V-shaped irons 5; fastening assemblies are respectively arranged on the two connecting plates 1 and at the outer ends of the left frame 3 and the right frame 4.

[0025] In this embodiment, the middle frame 2 includes a front middle frame and a rear middle frame with a symmetrical structure, the V-shaped iron 5 is located between the front middle frame and the rear middle frame, the left frame 3 includes a front left frame and a rear left frame with a symmetrical structure, a plurality of die plates 7 and a plurality of clamping plates 6 are placed alternately, the right frame 4 includes a front right frame and a rear right frame with a symmetrical structure, and the V-shaped iron 5 is located between the front right frame and the rear right frame; the left frame 3 and the right frame 4 are of a left-right symmetrical structure, and the inner inclined surfaces of the middle frame 2, the left frame 3 and the right frame 4 are used for limiting the product; the sealing end of the V-shaped iron 5 is of a flat surface structure.

[0026] This embodiment is further arranged such that: one clamping plate 6 and one die plate 7 are placed in each stepped groove, the die plate 7 is located between the two clamping plates 6, the thicknesses of the clamping plate 6 and the die plate 7 are the same as the height of the stepped groove, and the left end of the left frame 3 and the right end of the right frame 4 are used for limiting the clamping plate 6 and the die plate 7.

[0027] In this embodiment, the mating surfaces of the V-block 5 with the die plate 7 and the clamping plate 6 are designed as stepped surfaces. By numerically controlling the machining of the stepped surface of the V-block 5, it becomes the installation reference for the end widths of the die plate 7 and the clamping plate 6. The mating surface of the die plate 7 with the V-block 5 is also designed as a right-angle surface, and the assembly dimensions are easily guaranteed; the die plate 7 in each of the stepped grooves is located above the clamping plate.

[0028] This embodiment is further arranged as follows: on the upper sides of the two connecting plates 1, a first T-shaped groove 8, a second T-shaped groove 9, a third T-shaped groove 10, and a fourth T-shaped groove 11 are successively formed from the inside to the outside. A first fastener 12 is slidably arranged in the first T-shaped groove 8, and the upper end of the first fastener 12 penetrates through the middle frame 2 and is fixed by a first nut.

[0029] In this embodiment, the first fastener 12 is a square-headed bolt. By placing the square head of the square-headed bolt in the first T-shaped groove 8, the position of the square-headed bolt can be adjusted within the stroke of the first T-shaped groove 8, so as to facilitate adjusting the distance between the front middle frame and the rear middle frame to adapt to different models of die plates 7 and clamping plates 6.

[0030] This embodiment is further arranged as follows: a plurality of strip-shaped grooves are formed in the middle frame 2, and the upper end of the first fastener 12 is located in the strip-shaped grooves.

[0031] In this embodiment, the strip-shaped grooves are respectively located on the front middle frame and the rear middle frame. Through the arrangement of the strip-shaped grooves, when the left side frame 3 and the right side frame 4 are not used, the two connecting plates 1 can be brought closer, so that the left and right outer ends of the middle frame 2 are abutted against the fastening assembly, thus adapting to different models of V-blocks 5, die plates 7, and clamping plates 6.

[0032] This embodiment is further arranged as follows: a second fastener 13 and a third fastener 14 are respectively slidably arranged in the second T-shaped groove 9 and the third T-shaped groove 10. The upper end of the second fastener 13 penetrates through the left side frame 3 and is fixed by a second nut, and the upper end of the third fastener 14 penetrates through the right side frame 4 and is fixed by a third nut.

[0033] In this embodiment, the second fastener 13 and the third fastener 14 are square-headed bolts. By respectively placing the square heads of the second fastener 13 and the third fastener 14 in the second T-shaped groove 9 and the third T-shaped groove 10, the distance between the front left side frame and the rear left side frame and the distance between the front right side frame and the rear right side frame can be adjusted to adapt to different models of V-blocks 5, die plates 7, and clamping plates 6.

[0034] This embodiment is further configured as follows: The fastening assembly includes two fourth fasteners 15 slidably disposed in the fourth T-shaped groove 11. The upper ends of the fourth fasteners 15 penetrate through a plurality of clamping pieces 6 and die pieces 7 and respectively penetrate through a pressing piece 16. A fourth nut 17 is also screwed onto the fourth fastener 15. The pressing piece 16 is used to press a plurality of clamping pieces 6 and die pieces 7 tightly.

[0035] In this embodiment, the fourth fastener 15 also uses a square head bolt. By placing the square head portion of the fourth fastener 15 in the fourth T-shaped groove 11 respectively, the distance between two corresponding pressing pieces can be adjusted so as to press different models of clamping pieces 6 and die pieces 7 tightly.

[0036] This embodiment is further configured as follows: A pressing plate 17 is provided on the upper sides of the two pressing pieces 16. A fifth fastener 18 is also slidably disposed in the fourth T-shaped groove 11. The upper end of the fifth fastener 18 sequentially penetrates through a plurality of clamping pieces 6, a plurality of die pieces 7 and the pressing plate 17 and is fixed by a fifth nut.

[0037] In this embodiment, the fifth fastener 18 also uses a square head bolt. The fifth fastener 18 is located between the two fourth fasteners 15. Through the setting of the pressing plate 17, the inner ends of the two pressing pieces 16 can be flattened to prevent the pressing pieces from tilting; The middle part of the fifth fastener 18 also penetrates through the V-shaped iron 5. A positioning nut is also provided on the upper side plane of the V-shaped iron 5. The positioning nut is screwed onto the fifth fastener 18. This embodiment of the pressing plate 17 is further configured as follows: The lower sides of the two connecting plates 1 are also fixed with a base 19 by bolts.

[0038] Embodiment 2. This embodiment discloses a flat winding die for integral winding of a turbo-generator rotor coil, which includes two oppositely arranged connecting plates 1. A middle frame 2 is movably fixed on the two connecting plates 1. A left frame 3 and a right frame 4 are respectively arranged on the left and right outer sides of the middle frame 2. The left frame 3 and the right frame 4 are respectively movably fixed on the connecting plates 1. V-shaped irons 5 are arranged at the left end of the left frame 3 and the right end of the right frame 4. The openings of the V-shaped irons 5 abut against the two connecting plates 1; A plurality of stepped grooves are formed on the outer sides of the two inclined surfaces of the V-shaped iron 5; Fastening assemblies are respectively arranged on the two connecting plates 1 and on the outer sides of the left frame 3 and the right frame 4. First T-shaped grooves 8, second T-shaped grooves 9, third T-shaped grooves 10 and fourth T-shaped grooves 11 are sequentially formed on the upper sides of the two connecting plates 1 from the inside to the outside. A first fastener 12 is slidably disposed in the first T-shaped groove 8. The upper end of the first fastener 12 penetrates through the middle frame 2 and is fixed by a first nut.

[0039] In this embodiment, the cross-sections of the first T-shaped groove 8, the second T-shaped groove 9, the third T-shaped groove 10 and the fourth T-shaped groove 11 are of an inverted T-shaped structure.

[0040] One clip 6 and one die plate 7 are placed in each of the stepped grooves. A number of the die plates 7 and a number of the clips 6 are placed alternately. The thicknesses of the clip 6 and the die plate 7 are the same as the height of the stepped groove. The inner ends of the left frame 3 and the right frame 4 are used to limit the clip 6.

[0041] In this embodiment, the die plate 7 in each stepped groove is located below the clip 6.

[0042] The first fastener 12, the second fastener 13, the third fastener 14, the fourth fastener 15 and the fifth fastener 18 are fastening bolts. Rear seat nuts are slidably arranged in the first T-shaped groove 8, the second T-shaped groove 9, the third T-shaped groove 10 and the fourth T-shaped groove 11. The extended ends of the fastening bolts are screwed into the corresponding rear seat nuts.

[0043] Embodiment 3, on the basis of Embodiment 1: The base 19 includes a base sleeve 21 arranged at the bottom of the connection plate 1. A fixing

[0044] bolt 22 passes through the base sleeve. The fixing bolt passes through the base sleeve and is screwed into the bottom plate 22. The bottom plate 22 abuts against the lower side surface of the base sleeve. Limiting grooves are provided on the upper side and the lower side of the base sleeve 21. The head of the fixing bolt is located in the limiting groove. A nut screwed on the bolt is also arranged in the limiting groove.

[0045] This embodiment is further arranged as: A relief groove 211 is also provided on the base sleeve 21. An installation plate 23 is fixed to the bottom of the connection plate 1 by bolts and nuts. The installation plate 23 is used to cover the opening of the relief groove 211.

[0046] In this embodiment, through the arrangement of the base sleeve 21 and the installation plate 23, the mold is convenient to be installed on the flat winding machine.

[0047] Through the improvement of the end structure of the present invention, the original inclined surface of the V-shaped iron 5 is improved to a stepped shape. By replacing each group of rotor wire V-shaped irons in the middle, one group of die plates and clips can correspondingly wind 2 - 3 groups of rotor wires. Originally, one group of V-shaped irons, die plates and clips could only wind one group of rotor wires. It can be seen that after the improvement of the mold, the input quantity of die plates and clips is reduced (384 die plates and 400 clips), and the manufacturing cost of the product is reduced.

[0048] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation on the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, terms such as "set", "connect" should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A flat winding die for integral winding of a turbogenerator rotor coil, characterized in that, Including: Two oppositely arranged connecting plates (1), on which a middle frame (2) is movably fixed. On the left and right outer sides of the middle frame (2), a left frame (3) and a right frame (4) are respectively arranged. The left frame (3) and the right frame (4) are respectively movably fixed on the connecting plate (1). At the left end of the left frame (3) and the right end of the right frame (4), there are V-shaped irons (5), and the openings of the V-shaped irons (5) abut against the two connecting plates (1); on the outer sides of the two inclined surfaces of the V-shaped iron (5), a number of stepped grooves are provided; on the two connecting plates (1) and at the outer ends of the left frame (3) and the right frame (4), fastening components are respectively arranged. In each of the stepped grooves, a clamping piece (6) and a die piece (7) are placed. A number of the die pieces (7) and a number of the clamping pieces (6) are arranged alternately. The thicknesses of the clamping piece (6) and the die piece (7) are the same as the height of the stepped groove. The left end of the left frame (3) and the right end of the right frame (4) are used to limit the clamping piece (6) and the die piece (7). At the lower sides of the two connecting plates (1), a base (19) is also fixed by bolts.

2. The flat winding die for integral winding of the rotor coil of a turbogenerator according to claim 1, characterized in that: On the upper sides of the two connecting plates (1), a first T-shaped groove (8), a second T-shaped groove (9), a third T-shaped groove (10), and a fourth T-shaped groove (11) are successively arranged from the inside to the outside. A first fastener (12) is slidably arranged in the first T-shaped groove (8). The upper end of the first fastener (12) penetrates through the middle frame (2) and is fixed by a first nut.

3. The flat winding die for integral winding of the rotor coil of a steam turbine generator according to claim 2, wherein: A number of strip-shaped grooves are provided on the middle frame (2), and the upper end of the first fastener (12) is located in the strip-shaped grooves.

4. The flat winding die for integral winding of the rotor coil of a turbogenerator according to claim 2, characterized in that: A second fastener (13) and a third fastener (14) are respectively slidably arranged in the second T-shaped groove (9) and the third T-shaped groove (10). The upper end of the second fastener (13) penetrates through the left frame (3) and is fixed by a second nut. The upper end of the third fastener (14) penetrates through the right frame (4) and is fixed by a third nut.

5. The flat winding die for integral winding of the rotor coil of a steam turbine generator according to claim 2, characterized in that: The fastening component includes two fourth fasteners (15) slidably arranged in the fourth T-shaped groove (11). The upper ends of the fourth fasteners (15) penetrate through a number of clamping pieces (6) and die pieces (7) and respectively penetrate through a pressing piece (16). A fourth nut is also screwed on the fourth fastener (15). The pressing piece (16) is used to press a number of clamping pieces (6) and die pieces (7).

6. The flat winding die for integral winding of the rotor coil of a steam turbine generator according to claim 5, characterized in that: On the upper sides of the two pressing pieces (16), there is a pressing plate (17). A fifth fastener (18) is also slidably arranged in the fourth T-shaped groove (11). The upper end of the fifth fastener (18) successively penetrates through a number of clamping pieces (6), a number of die pieces (7), and the pressing plate (17) and is fixed by a fifth nut.

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