Shaping tool for end part of excitation coil of rotor of two-pole three-phase brushless synchronous generator

Abstract

The utility model discloses a two-pole three-phase brushless synchronous generator rotor excitation coil end portion shaping tool which solves the problem of how to efficiently position and shape an excitation coil end portion on a motor rotor iron core with high quality. An annular supporting plate (8) is connected to the motor rotating shaft end (1) on the right side of the end winding (2) in a sleeved mode, an arc-shaped shaping plate (5) is spliced between an annular step (18) and the annular supporting plate (8), the inner side arc-shaped face of the arc-shaped shaping plate (5) is connected to the end winding (2) in a pressed mode, and a first positioning ring (12) and a second positioning ring (13) are movably connected to the outer side of a shaping circular ring in a sleeved mode. An annular groove rail is arranged between the first positioning ring (12) and the second positioning ring (13), an I-shaped arc-shaped sliding block (14) is movably arranged in the annular groove rail, a radial jackscrew (15) is connected into a radial jackscrew screw hole (17) in a threaded mode, and the inner side end of the radial jackscrew (15) abuts against the outer side face of the arc-shaped shaping plate (5).

Description

Technical Field

[0001] The utility model relates to a magnetic pole excitation coil of a generator rotor, in particular to an end shaping tool for an excitation coil in a two-pole generator rotor. Background Art

[0002] The rotor core of the three-phase brushless synchronous generator is divided into two types: salient pole core structure and non-salient pole structure. The excitation winding is wound on the outer surface of the salient pole core to form a salient pole magnetic pole, and the non-salient pole magnetic pole is formed by embedding a group of concentric coils into the non-salient pole core wire slot. The preparation of the rotor of the three-phase brushless synchronous generator with non-salient pole magnetic pole structure is completed by the following process: first complete the winding of the concentric excitation coil group, and then embed the concentric excitation coil group into the corresponding core slot on the rotor to form the N-pole excitation coil and S-pole excitation coil of the motor rotor, and then embed the N-pole excitation coil into the corresponding core slot on the rotor. The ring and the S-pole excitation coil are connected in series and connected to the excitation power supply, forming invisible magnetic poles with alternating N and S poles of the generator on the rotor, and the motor rotor magnetic poles are formed by powering the excitation power supply; since the excitation winding ends of the invisible pole type magnetic pole are suspended outside the two ends of the rotor core, the suspended core ends will be subjected to a large centrifugal force during the high-speed rotation of the rotor. If the ends of the pole coils in the rotor core are not on the same circumference, the initial balance of the rotor will increase, making the motor unable to pass the dynamic balance test; the existing technology is to insert a glass fiber reinforced plastic prefabricated ring into the end of the excitation coil of the three-phase brushless synchronous generator rotor Or the end of the coil is directly wound with a non-woven band hoop to complete the positioning and fixation of the coil end, so that the winding end will not become loose and deformed when the motor rotor rotates, and it can pass the dynamic balance test smoothly; but for motors with a speed greater than 3000 revolutions per minute, a prefabricated steel guard ring is generally used, and the steel guard ring is inserted into the end of the suspended rotor core coil to restrain and position the winding end, so that the outer circles of each excitation winding are on the same circumference; but since the outer circle assembly size of the steel guard ring and the rotor coil is small, the end of the rotor coil must be adjusted The shape must meet the requirements of steel guard ring installation. How to efficiently complete the high-quality shaping of the end of the motor rotor excitation coil has become a problem that needs to be solved during on-site assembly. In addition, since the steel guard ring can only shape and position the outer circle of the end winding of the suspended electrode rotor excitation coil, but has no restrictions on the inner circle of the suspended end winding, there is also an uneven gap between the suspended winding end and the outer surface of the rotor shaft. If the inner circle of the rotor end winding is not properly shaped, it will also affect the dynamic balance of the motor during rotation. How to solve this problem has become an issue that needs to be paid attention to in the assembly of motor rotor windings. Summary of the Invention

[0003] The utility model provides a two-pole three-phase brushless synchronous generator rotor excitation coil end shaping tool, which solves the technical problem of how to efficiently and high-quality position and shape the excitation coil end on the motor rotor core.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A two-pole three-phase brushless synchronous generator rotor excitation coil end shaping tool, including a motor shaft end and an end winding of the excitation coil, an annular step is provided on the outer vertical surface of the rotor core outside the end winding, and an annular gap is provided between the motor shaft end and the inner side surface of the end winding; an annular support plate is sleeved on the motor shaft end on the right side of the end winding, an arc-shaped shaping plate is spliced ​​between the annular step and the annular support plate, the inner arc surface of the arc-shaped shaping plate is pressed onto the end winding, a left arc step is provided on the inner arc surface of the left end of the arc shaping plate, a right arc step is provided on the inner arc surface of the right end of the arc shaping plate, and the left arc step and the annular step are connected. The steps are movably matched together, and the right arc-shaped step is movably matched with the annular support plate; eight arc-shaped shaping plates are spliced ​​into a shaping ring, and a first positioning ring and a second positioning ring are movably sleeved on the outside of the shaping ring. The first positioning ring and the second positioning ring are arranged parallel to each other and are connected into a whole through ring connecting pins arranged at equal intervals of arc. An annular groove track is provided between the first positioning ring and the second positioning ring, and an I-shaped arc-shaped slider is movably provided in the annular groove track, and a radial top screw hole is provided on the I-shaped arc-shaped slider, and a radial top screw is screwed in the radial top screw hole, and the inner end of the radial top screw is connected to the outer surface of the arc-shaped shaping plate.

[0006] An inner upper arc-shaped pad and an inner lower arc-shaped pad are respectively arranged in the annular gap, and the inner upper arc-shaped pads are spliced ​​into a circular ring, and the inner lower arc-shaped pads are spliced ​​into a circular ring; a second group of shaping outer rings consisting of a third positioning ring and a fourth positioning ring are arranged in parallel on the outside of the end winding, and the structure of the second group of shaping outer rings is exactly the same as the structure of the first group of shaping outer rings consisting of the first positioning ring and the second positioning ring.

[0007] An annular rubber shaping pressure plate is provided on the right vertical surface of the end winding, and side top screw holes are provided at equal intervals on the same circumference of the annular support plate. Side top screws are screwed in the side top screw holes, and the inner ends of the side top screws are connected to the right vertical surface of the annular rubber shaping pressure plate.

[0008] A method for shaping the end of a rotor excitation coil of a two-pole, three-phase brushless synchronous generator includes a motor shaft end and an end winding of the excitation coil, an annular step is provided on the outer vertical surface of the rotor core outside the end winding, and an annular gap is provided between the motor shaft end and the inner side surface of the end winding; the insulation wrapping method includes the following steps:

[0009] The first step is to arrange an inner upper arc pad and an inner lower arc pad in the annular gap. The inner upper arc pads are spliced ​​into a circular ring, and the inner lower arc pads are spliced ​​into a circular ring. The two circular rings support and position the inner side surface of the end winding.

[0010] Step 2: Take the annular rubber shaping plate and put it on the end of the motor shaft so that the annular rubber shaping plate is close to the right side of the end winding;

[0011] The third step is to manufacture an annular support plate and eight arc-shaped shaping plates respectively, so that the diameter of the annular support plate is equal to the diameter of the annular step, and side top screw holes are set at equal intervals on the same circumference of the annular support plate; a left arc step is set on the inner arc surface of the left end of the arc-shaped shaping plate, and a right arc step is set on the inner arc surface of the right end of the arc-shaped shaping plate, so that the eight arc-shaped shaping plates are spliced ​​into a circular ring;

[0012] The fourth step is to sleeve the annular support plate onto the end of the motor shaft, and place the arc-shaped shaping plate between the annular step and the annular support plate;

[0013] Step 5: Make a first positioning ring and a second positioning ring with a diameter larger than the diameter of the motor rotor, set the first positioning ring and the second positioning ring parallel to each other, and connect them into a whole through ring connecting pins set at equal intervals of curvature, set an annular groove track between the first positioning ring and the second positioning ring, and movably set an I-shaped arc-shaped slider in the annular groove track, and set a radial top screw hole on the I-shaped arc-shaped slider, and movably set 16 I-shaped arc-shaped sliders in the annular groove track;

[0014] Step 6: Sleeve the first set of shaped outer rings made in step 5 onto the outside of the end winding, connect the radial top screws in the radial top screw holes, and screw the side top screws in the side top screw screw holes;

[0015] Step 7: Rotate each radial top screw so that the inner end of the radial top screw is in contact with the arc shaping plate to achieve the shaping of the outer arc of the end winding. At the same time, rotate the side top screw so that the inner end of the side top screw is in contact with the annular rubber shaping pressure plate to achieve the shaping of the side surface of the end winding end.

[0016] The utility model overcomes the defect that the ends of the large-span two-pole rotor coils rotating at high speed are easily loose and deformed after being embedded in the rear end, ensures the standardization of the winding end size, improves the concentricity of the winding end, and provides convenient conditions for the smooth installation of the subsequent steel guard ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a transverse cross-sectional view of the utility model;

[0019] Figure 3 It is a transverse partial cross-sectional view of the utility model;

[0020] Figure 4 This is a diagram showing the matching relationship between the inner upper and lower arc-shaped pads and the end winding 2 of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the annular support plate 8 provided on the motor shaft end 1 of the present invention;

[0022] Figure 6 This is a diagram showing the matching relationship between the arc-shaped shaping plate 5 and the annular support plate 8 of the present invention;

[0023] Figure 7 This is a schematic structural diagram of the plastic outer ring of the utility model;

[0024] Figure 8 It is a structural diagram of the I-shaped arc-shaped slider 14 of the present invention. DETAILED DESCRIPTION

[0025] The utility model is described in detail below with reference to the accompanying drawings:

[0026] A two-pole three-phase brushless synchronous generator rotor excitation coil end shaping tool, including a motor shaft end 1 and an end winding 2 of the excitation coil, an annular step 18 is provided on the outer vertical surface of the rotor core outside the end winding 2. Since the end winding 2 is cantilevered and arranged on the outside of the motor core, there is an annular gap between the motor shaft end 1 and the inner side surface of the end winding 2; an annular support plate 8 is sleeved on the motor shaft end 1 on the right side of the end winding 2, and a gap is formed between the annular step 18 and the annular support plate 8. There is an arc-shaped shaping plate 5 spliced ​​between them, the inner arc surface of the arc-shaped shaping plate 5 is pressed on the end winding 2, a left arc step 6 is provided on the inner arc surface of the left end of the arc-shaped shaping plate 5, and a right arc step 7 is provided on the inner arc surface of the right end of the arc-shaped shaping plate 5. The left arc step 6 is movably matched with the annular step 18, and the right arc step 7 is movably matched with the annular support plate 8; the eight arc-shaped shaping plates 5 are spliced ​​into a shaping ring, and the glass fiber reinforced plastic prefabricated ring is sleeved on the shaping ring after the shaping is in place. , to achieve the positioning of the end winding 2 so that it is on the same circumference, thereby improving the dynamic balance of the motor rotor; a first positioning ring 12 and a second positioning ring 13 are movably sleeved on the outside of the shaping ring, and the diameter of the first positioning ring 12 and the diameter of the second positioning ring 13 are larger than the diameter of the shaping ring formed by splicing eight arc-shaped shaping plates 5, so that the two positioning rings are suspended on the outside of the shaping ring, and the first positioning ring 12 and the second positioning ring 13 are arranged parallel to each other and are connected by rings arranged at equal intervals of arc. The pin shaft 16 is connected as a whole, and an annular groove track is provided between the first positioning ring 12 and the second positioning ring 13. An I-shaped arc-shaped slider 14 is movably provided in the annular groove track, and a radial top screw hole 17 is provided on the I-shaped arc-shaped slider 14. A radial top screw 15 is screwed into the radial top screw hole 17. The inner end of the radial top screw 15 is top-connected to the outer surface of the arc-shaped shaping plate 5. By rotating the radial top screw 15, the inner end of the radial top screw 15 is top-connected to the arc-shaped shaping plate 5 to shape it.

[0027] In the annular gap, an inner upper arc pad 3 and an inner lower arc pad 4 are respectively arranged. The inner upper arc pads 3 are spliced ​​into a circular ring, and the inner lower arc pads 4 are spliced ​​into a circular ring. The inner lower arc pads 4 are larger than the inner upper arc pads 3 to facilitate the assembly and disassembly of the upper and lower arc pads. The circular ring spliced ​​by the inner upper arc pads 3 serves to support the inner ring of the end winding 2, so that the inner ring of the end winding 2 is on the same circumference to improve the dynamic balance of the motor rotor; a second group of shaping outer rings consisting of a third positioning ring 19 and a fourth positioning ring 20 are arranged in parallel on the outside of the end winding 2, and the structure of the second group of shaping outer rings is exactly the same as the structure of the first group of shaping outer rings consisting of the first positioning ring 12 and the second positioning ring 13; the two parallel shaping outer rings can shape and position the eight arc shaping plates 5 at the same time, thereby improving the shaping work efficiency.

[0028] An annular rubber shaping pressure plate 9 is provided on the right side vertical surface of the end winding 2, and side top screw holes 10 are provided at equal intervals on the same circumference of the annular support plate 8. Side top screws 11 are screwed into the side top screw holes 10, and the inner ends of the side top screws 11 are connected to the right side vertical surface of the annular rubber shaping pressure plate 9; when the end winding 2 is shaped on site, the radial top screws 15 and the side top screws 11 can be rotated synchronously, and the two can cooperate to shape the end winding 2 to an ideal state.

[0029] A method for shaping the end of a rotor excitation coil of a two-pole three-phase brushless synchronous generator includes a motor shaft end 1 and an end winding 2 of the excitation coil. An annular step 18 is provided on the outer vertical surface of the rotor core outside the end winding 2, and an annular gap is provided between the motor shaft end 1 and the inner side surface of the end winding 2. The insulation wrapping method includes the following steps:

[0030] The first step is to arrange an inner upper arc-shaped pad 3 and an inner lower arc-shaped pad 4 in the annular gap. The inner upper arc-shaped pads 3 are spliced ​​into a circular ring, and the inner lower arc-shaped pads 4 are spliced ​​into a circular ring. The two circular rings support and position the inner side surface of the end winding 2.

[0031] Step 2: Take the annular rubber shaping plate 9 and sleeve it on the motor shaft end 1 so that the annular rubber shaping plate 9 is in contact with the right side of the end winding 2;

[0032] The third step is to make an annular support plate 8 and eight arc-shaped shaping plates 5 respectively, so that the diameter of the annular support plate 8 is equal to the diameter of the annular step 18, and side top screw holes 10 are set at equal intervals on the same circumference of the annular support plate 8; a left arc step 6 is set on the inner arc surface of the left end of the arc-shaped shaping plate 5, and a right arc step 7 is set on the inner arc surface of the right end of the arc-shaped shaping plate 5, so that the eight arc-shaped shaping plates 5 are spliced ​​into a circular ring;

[0033] The fourth step is to sleeve the annular support plate 8 onto the motor shaft end 1, and place the arc-shaped shaping plate 5 between the annular step 18 and the annular support plate 8;

[0034] Step 5: Make a first positioning ring 12 and a second positioning ring 13 with a diameter larger than the diameter of the motor rotor, set the first positioning ring 12 and the second positioning ring 13 parallel to each other, and connect them into a whole through a ring connecting pin 16 arranged at equal intervals of curvature. An annular groove track is provided between the first positioning ring 12 and the second positioning ring 13, and an I-shaped arc-shaped slider 14 is movably provided in the annular groove track. A radial top screw hole 17 is provided on the I-shaped arc-shaped slider 14, and 16 I-shaped arc-shaped sliders 14 are movably provided in the annular groove track.

[0035] Step 6: Sleeve the first set of shaped outer rings made in step 5 onto the outside of the end winding 2, connect the radial top screws 15 into the radial top screw holes 17, and screw the side top screws 11 into the side top screw holes 10;

[0036] The seventh step is to rotate each radial top screw 15 so that the inner end of the radial top screw 15 is in contact with the arc shaping plate 5 to achieve the shaping of the outer arc of the end winding 2. At the same time, the side top screw 11 is rotated so that the inner end of the side top screw 11 is in contact with the annular rubber shaping plate 9 to achieve the shaping of the end side of the end winding 2.

[0037] A second group of shaping outer rings consisting of a third positioning ring 19 and a fourth positioning ring 20 are arranged in parallel on the outside of the end winding 2. The structure of the second group of shaping outer rings is exactly the same as that of the first group of shaping outer rings consisting of the first positioning ring 12 and the second positioning ring 13. The outer arc of the end winding 2 can be shaped synchronously by rotating the radial top screws on the second group of shaping outer rings at the same time.

Claims

1. A two-pole three-phase brushless synchronous generator rotor excitation coil end shaping tool, comprising a motor shaft end (1) and an end winding (2) of the excitation coil, an annular step (18) being provided on the outer side elevation of the rotor core outside the end winding (2), and an annular gap being provided between the motor shaft end (1) and the inner side surface of the end winding (2); characterized in that: An annular support plate (8) is sleeved on the motor shaft end (1) on the right side of the end winding (2), and an arc-shaped shaping plate (5) is spliced ​​between the annular step (18) and the annular support plate (8). The inner arc surface of the arc-shaped shaping plate (5) is pressed onto the end winding (2). A left arc-shaped step (6) is provided on the inner arc surface of the left end of the arc-shaped shaping plate (5), and a right arc-shaped step (7) is provided on the inner arc surface of the right end of the arc-shaped shaping plate (5). The left arc-shaped step (6) and the annular step (18) are movably matched together, and the right arc-shaped step (7) and the annular support plate (8) are movably matched together; the eight arc-shaped shaping plates (5) are spliced ​​into a shaping ring, and the inner arc surface of the shaping ring is pressed onto the end winding (2). A first positioning ring (12) and a second positioning ring (13) are movably sleeved on the outer side of the ring. The first positioning ring (12) and the second positioning ring (13) are arranged parallel to each other and are connected into a whole by ring connecting pins (16) arranged at equal intervals of arc. An annular groove track is provided between the first positioning ring (12) and the second positioning ring (13). An I-shaped arc-shaped slider (14) is movably provided in the annular groove track. A radial top screw hole (17) is provided on the I-shaped arc-shaped slider (14). A radial top screw (15) is screwed into the radial top screw hole (17). The inner end of the radial top screw (15) is top-connected to the outer surface of the arc-shaped shaping plate (5).

2. The tool for shaping the rotor excitation coil end of a two-pole three-phase brushless synchronous generator according to claim 1, characterized in that: An inner upper arc pad (3) and an inner lower arc pad (4) are respectively arranged in the annular gap, and each inner upper arc pad (3) is spliced ​​into a circular ring, and each inner lower arc pad (4) is spliced ​​into a circular ring; a second group of shaped outer rings consisting of a third positioning ring (19) and a fourth positioning ring (20) are arranged in parallel on the outer side of the end winding (2), and the structure of the second group of shaped outer rings is completely the same as the structure of the first group of shaped outer rings consisting of the first positioning ring (12) and the second positioning ring (13).

3. The tool for shaping the rotor excitation coil end of a two-pole three-phase brushless synchronous generator according to claim 2, characterized in that: An annular rubber shaping pressing plate (9) is provided on the right side elevation of the end winding (2), side top screw holes (10) are provided at equal intervals of arc on the same circumference of the annular support plate (8), side top screws (11) are screwed into the side top screw holes (10), and the inner side ends of the side top screws (11) are connected to the right side elevation of the annular rubber shaping pressing plate (9).

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