Generator rotor hidden pole coil end shaping and pressing tool and shaping and pressing method

Abstract

The present invention discloses a shaping and pressing tool and shaping and pressing method for the end of a generator rotor hidden pole coil, which solves the problem of the prior art that it is time-consuming and labor-intensive to press and shape the coil end in each U-shaped clamp one by one when shaping and pressing the generator rotor hidden pole end coil. Two shaping and pressing gantries are evenly arranged near several U-shaped steel clamps arranged at the end of the generator rotor hidden pole coil, and a manually pressurized pressure rod is arranged on the shaping and pressing gantries. By pressing down the two pressure rods, the loose coil ends are simultaneously pressed into the corresponding notches of the U-shaped steel clamps, thereby changing the traditional operation method of pressing down the loose coil ends in the notches of each U-shaped steel clamp one by one, saving shaping time and improving shaping efficiency.

Description

Technical Field

[0001] The invention relates to a shaping tool for a hidden pole coil end on a generator rotor, and in particular to a shaping and pressing tool for a hidden pole coil end on a generator rotor and a shaping and pressing method. Background Art

[0002] The rotor of a high-speed generator usually adopts a hidden pole coil structure. Each magnetic pole on the rotor is formed by embedding the rotor coil into the wire embedding groove on the rotor core. Each magnetic pole rotor coil is wound by concentric multi-turn windings. The long side of the magnetic pole rotor coil is embedded in the wire embedding groove on the rotor core, and the short side of the magnetic pole rotor coil is exposed outside the two end surfaces of the rotor core to form coil ends. In order to prevent the coil ends from shifting in the radial direction under the action of a large centrifugal force when the motor is running, the rotor coil ends must be fastened in the assembly of such motors. The existing fastening method generally adopts a U-shaped steel clip. Several U-shaped steel clips are pre-fixed on the steel ring on the outer side of the rotor core, and the rotor coil ends are embedded in the U-shaped steel clips in groups. Then a fastening cover plate is set on the port of the U-shaped steel clip. The fastening cover plate cooperates with the U-shaped steel clip to firmly fix the coil ends. Due to the rotor The ends of the sub-coils are arranged in layers along the axial direction, and the inner and outer coil ends need to be fixed with U-shaped steel clips respectively. When the coils are embedded into the U-shaped grooves of the U-shaped steel clips layer by layer, the coil ends at the ports of the U-shaped steel clips are in a loose state, especially the outlet ends with heavy-interval and inter-pole connections, where the loose state is more serious. The loose coils cause the fastening cover plate of the U-shaped steel clip to be unable to be directly inserted into the slot of the U-shaped steel clip, and the coil ends cannot be tightened. In order to enable the fastening cover plate of the U-shaped steel clip to be smoothly inserted, the existing conventional process method is: by manually knocking and shaping the coil ends in the loose U-shaped steel clip ports, so that they can completely enter the U-shaped steel clip ports. Since the reserved space for the coil ends is small, this fastening and shaping method requires the coil ends in the U-shaped steel clip to be pressed down, shaped and fastened one by one, and there is a defect that the shaping work is time-consuming and labor-intensive. Summary of the invention

[0003] The present invention provides a shaping and pressing tool and shaping and pressing method for the end of a generator rotor hidden pole coil, which solves the technical problem of the prior art that when shaping and pressing the generator rotor hidden pole end coil, the coil end in each U-shaped bayonet needs to be pressed and shaped one by one, which is time-consuming and labor-intensive.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of the present invention is: two shaping and pressing gantries are evenly arranged near several U-shaped steel clips arranged at the ends of the hidden-pole coils of the generator rotor, and a manually pressed pressure rod is arranged on the shaping and pressing gantries. By pressing down the two pressure rods, the loose coil ends are pressed into the corresponding notches of the U-shaped steel clips at the same time, thereby changing the traditional operation method of pressing down the loose coil ends in the notches of each U-shaped steel clip one by one, saving shaping time and improving shaping efficiency.

[0006] A generator rotor hidden pole coil end shaping and pressing tool comprises a rotor core, a hidden pole coil long side embedding groove is arranged on the rotor core, the long side of the hidden pole coil is embedded in the hidden pole coil long side embedding groove, an inner side group of the hidden pole coil short side and an outer side group of the hidden pole coil short side are arranged at the end of the rotor core, a first inner side U-shaped clip and a second inner side U-shaped clip are respectively arranged on the inner side group of the hidden pole coil short side, a third outer side U-shaped clip, a fourth outer side U-shaped clip and a fifth outer side U-shaped clip are respectively arranged on the outer side group of the hidden pole coil short side, and the inner side group of the hidden pole coil short side at the rear side of the first inner side U-shaped clip and the short side of the hidden pole coil at the front side of the third outer side U-shaped clip are respectively formed. A right rear shaping gantry is sleeved between the outer groups, and a right front shaping gantry is sleeved between the inner group of the short sides of the hidden pole coil on the front side of the second inner U-shaped card and the outer group of the short sides of the hidden pole coil on the rear side of the fifth outer U-shaped card. The structure of the right rear shaping gantry is exactly the same as that of the right front shaping gantry. A movable plug rod at the lower end of the right front shaping gantry is arranged at the bottom end of the right front shaping gantry, and a crimping screw threading hole is arranged on the top cross beam of the gantry frame of the right front shaping gantry. A crimping screw is threaded in the crimping screw threading hole, and a pressure rod is connected to the bottom end of the crimping screw, and the pressure rod is crimped on the inner group of the short sides of the hidden pole coil and the outer group of the short sides of the hidden pole coil.

[0007] Both upright posts of the door-shaped frame are provided with long guide holes, and the ends of the pressure rods are movably arranged in the long guide holes; and top pressure fulcrum connection holes for connecting the pressure screws are evenly arranged on the pressure rods.

[0008] A method for shaping and pressing the end of a hidden-pole coil of a generator rotor comprises the following steps:

[0009] The first step is to sleeve the right rear shaping gantry between the inner group of the short sides of the hidden pole coils at the rear side of the first inner U-shaped card and the outer group of the short sides of the hidden pole coils at the front side of the third outer U-shaped card, and sleeve the right front shaping gantry between the inner group of the short sides of the hidden pole coils at the front side of the second inner U-shaped card and the outer group of the short sides of the hidden pole coils at the rear side of the fifth outer U-shaped card. The structure of the right rear shaping gantry is exactly the same as that of the right front shaping gantry; a movable plug rod at the lower end of the right front shaping gantry is arranged at the bottom end of the right front shaping gantry, a crimping screw is screwed into the screw hole of the crimping screw, a pressing rod is connected to the bottom end of the crimping screw, and the pressing rod is crimped on the inner group of the short sides of the hidden pole coils and the outer group of the short sides of the hidden pole coils;

[0010] The second step is to rotate the crimping screw on the right front shaping gantry so that the pressure rod is crimped on the inner group of the short side of the hidden pole coil and the outer group of the short side of the hidden pole coil; rotate the crimping screw on the right rear shaping gantry on the right rear shaping gantry so that the pressure rod on the right rear shaping gantry is crimped on the inner group of the short side of the hidden pole coil and the outer group of the short side of the hidden pole coil, so that the inner group of the short side of the hidden pole coil and the outer group of the short side of the hidden pole coil both enter the corresponding U-shaped clamping openings;

[0011] Step 3: Connect the top cover plate of the first inner U-shaped card to the top port of the first inner U-shaped card, connect the top cover plate of the second inner U-shaped card to the top port of the second inner U-shaped card, connect the top cover plate of the third outer U-shaped card to the top port of the third outer U-shaped card, connect the top cover plate of the fourth outer U-shaped card to the top port of the fourth outer U-shaped card, and connect the top cover plate of the fifth outer U-shaped card to the top port of the fourth outer U-shaped card;

[0012] Step 4: Pull out the movable rod at the lower end of the right front shaping gantry, remove the right front shaping gantry, pull out the movable rod at the lower end of the right rear shaping gantry, and remove the right rear shaping gantry.

[0013] The present invention is easy to implement on site and has a simple operation process, which greatly improves the work efficiency of the coil end fixing process and reduces the probability of easy damage to the insulation layer caused by coil shaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention after the top cover plate of the U-shaped card is covered on the top port of the U-shaped card after the fastening and shaping is completed;

[0015] Figure 2 It is a schematic structural diagram of the coil end of the present invention before being tightened and shaped;

[0016] Figure 3 It is a structural schematic diagram of the shaping gantry of the present invention;

[0017] Figure 4It is a structural schematic diagram of the column of the shaping gantry of the present invention;

[0018] Figure 5 It is a schematic structural diagram of the pressure rod 22 of the present invention;

[0019] Figure 6 yes Figure 1 The BB sectional view is also a diagram showing the fastening fit between the U-shaped clip and the coil end of the present invention. DETAILED DESCRIPTION

[0020] The present invention is described in detail below in conjunction with the accompanying drawings:

[0021] A shaping and pressing tool for the end of a hidden pole coil of a generator rotor comprises a rotor core 1, a hidden pole coil long side embedding groove 2 is arranged on the rotor core 1, a hidden pole coil long side 3 is embedded in the hidden pole coil long side embedding groove 2, a hidden pole coil short side inner side group 4 and a hidden pole coil short side outer side group 5 are arranged at the end of the rotor core 1, a first inner side U-shaped card 6 and a second inner side U-shaped card 7 are respectively arranged on the hidden pole coil short side inner side group 4, a third outer side U-shaped card 8, a fourth outer side U-shaped card 9 and a fifth outer side U-shaped card 10 are respectively arranged on the hidden pole coil short side outer side group 5, and a hidden pole coil short side inner side group 4 at the rear side of the first inner side U-shaped card 6 and a hidden pole coil short side outer side group 5 at the front side of the third outer side U-shaped card 8 are sleeved. There is a right rear shaping gantry 11, and a right front shaping gantry 12 is sleeved between the inner group 4 of the short side of the hidden pole coil on the front side of the second inner U-shaped card 7 and the outer group 5 of the short side of the hidden pole coil on the rear side of the fifth outer U-shaped card 10. The structure of the right rear shaping gantry 11 is exactly the same as that of the right front shaping gantry 12. A right front shaping gantry lower end movable plug rod 19 is arranged at the bottom end of the right front shaping gantry 12, and a crimping screw threading hole 20 is arranged on the top cross beam of the gantry frame 18 of the right front shaping gantry 12. A crimping screw 21 is threaded in the crimping screw threading hole 20, and a pressing rod 22 is connected to the bottom end of the crimping screw 21. The pressing rod 22 is crimped on the inner group 4 of the short side of the hidden pole coil and the outer group 5 of the short side of the hidden pole coil.

[0022] On both upright posts of the door-shaped frame 18 , there are provided long guide holes 23 , in which the ends of the pressure rods 22 are movably arranged; and on the pressure rods 22 , there are provided equidistantly provided pressure fulcrum connection holes 24 for connecting the pressure screws 21 .

[0023] A method for shaping and pressing the end of a hidden-pole coil of a generator rotor comprises the following steps:

[0024] The first step is to sleeve the right rear shaping gantry 11 between the inner group 4 of the short side of the hidden pole coil at the rear side of the first inner U-shaped card 6 and the outer group 5 of the short side of the hidden pole coil at the front side of the third outer U-shaped card 8, and sleeve the right front shaping gantry 12 between the inner group 4 of the short side of the hidden pole coil at the front side of the second inner U-shaped card 7 and the outer group 5 of the short side of the hidden pole coil at the rear side of the fifth outer U-shaped card 10. The structure of the right rear shaping gantry 11 is exactly the same as that of the right front shaping gantry 12; a movable plug rod 19 at the lower end of the right front shaping gantry 12 is provided, a crimping screw 21 is screwed into the crimping screw screw hole 20, and a pressing rod 22 is connected to the bottom end of the crimping screw 21, and the pressing rod 22 is crimped on the inner group 4 of the short side of the hidden pole coil and the outer group 5 of the short side of the hidden pole coil;

[0025] The second step is to rotate the crimping screw 21 on the right front shaping gantry 12 so that the pressure rod 22 is crimped onto the inner group 4 of the short side of the hidden pole coil and the outer group 5 of the short side of the hidden pole coil; by rotating the crimping screw of the right rear shaping gantry on the right rear shaping gantry 11, the pressure rod on the right rear shaping gantry is crimped onto the inner group 4 of the short side of the hidden pole coil and the outer group 5 of the short side of the hidden pole coil, so that the inner group 4 of the short side of the hidden pole coil and the outer group 5 of the short side of the hidden pole coil both enter the corresponding U-shaped clamping openings;

[0026] Step 3: Connect the top cover plate 13 of the first inner U-shaped card to the top port of the first inner U-shaped card 6, connect the top cover plate 14 of the second inner U-shaped card to the top port of the second inner U-shaped card 7, connect the top cover plate 15 of the third outer U-shaped card to the top port of the third outer U-shaped card 8, connect the top cover plate 16 of the fourth outer U-shaped card to the top port of the fourth outer U-shaped card 9, and connect the top cover plate 17 of the fifth outer U-shaped card to the top port of the fourth outer U-shaped card 10;

[0027] The fourth step is to extract the movable rod 19 at the lower end of the right front shaping gantry, remove the right front shaping gantry 12, extract the movable rod at the lower end of the right rear shaping gantry, and remove the right rear shaping gantry 11.

Claims

1. A method for shaping and pressing the end of a generator rotor hidden pole coil, the method is performed by using a shaping and pressing tool for the end of the generator rotor hidden pole coil, the shaping and pressing tool for the end of the generator rotor hidden pole coil comprises a rotor core, a hidden pole coil long side embedding groove is arranged on the rotor core, the long side of the hidden pole coil is embedded in the hidden pole coil long side embedding groove, an inner side group of the hidden pole coil short side and an outer side group of the hidden pole coil short side are arranged at the end of the rotor core, a first inner side U-shaped clip and a second inner side U-shaped clip are respectively arranged on the inner side group of the hidden pole coil short side, and a third outer side U-shaped clip, a fourth outer side U-shaped clip and a fifth outer side U-shaped clip are respectively arranged on the outer side group of the hidden pole coil short side, the method comprises the following steps: The first step is to sleeve a right rear shaping gantry frame between the inner group of the short sides of the hidden pole coils at the rear side of the first inner U-shaped card and the outer group of the short sides of the hidden pole coils at the front side of the third outer U-shaped card, and to sleeve a right front shaping gantry frame between the inner group of the short sides of the hidden pole coils at the front side of the second inner U-shaped card and the outer group of the short sides of the hidden pole coils at the rear side of the fifth outer U-shaped card. The structure of the right rear shaping gantry frame is exactly the same as that of the right front shaping gantry frame. A right front shaping gantry frame is set at the bottom end of the right front shaping gantry frame. A movable plug rod is provided at the lower end of the frame, a crimping screw threading hole is provided on the top crossbeam of the gate-shaped frame of the right front shaping gantry frame, a crimping screw is threaded in the crimping screw threading hole, a pressure rod is connected at the bottom end of the crimping screw, and the pressure rod is crimped on the inner group of the short side of the hidden pole coil and the outer group of the short side of the hidden pole coil; guide strip holes are provided on the two columns of the gate-shaped frame, and the ends of the pressure rods are movably arranged in the guide strip holes; top pressure fulcrum connection holes for connecting the crimping screws are provided at equal intervals on the pressure rod; The second step is to rotate the crimping screw on the right front shaping gantry so that the pressure rod is crimped on the inner group of the short side of the hidden pole coil and the outer group of the short side of the hidden pole coil; rotate the crimping screw on the right rear shaping gantry on the right rear shaping gantry so that the pressure rod on the right rear shaping gantry is crimped on the inner group of the short side of the hidden pole coil and the outer group of the short side of the hidden pole coil, so that the inner group of the short side of the hidden pole coil and the outer group of the short side of the hidden pole coil both enter the corresponding U-shaped clamping openings; Step 3: Connect the top cover plate of the first inner U-shaped card to the top port of the first inner U-shaped card, connect the top cover plate of the second inner U-shaped card to the top port of the second inner U-shaped card, connect the top cover plate of the third outer U-shaped card to the top port of the third outer U-shaped card, connect the top cover plate of the fourth outer U-shaped card to the top port of the fourth outer U-shaped card, and connect the top cover plate of the fifth outer U-shaped card to the top port of the fifth outer U-shaped card; Step 4: Pull out the movable rod at the lower end of the right front shaping gantry, remove the right front shaping gantry, pull out the movable rod at the lower end of the right rear shaping gantry, and remove the right rear shaping gantry.

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