JP2015035901A - Rotor and method of manufacturing rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotor in which a plurality of ventilating flues for cooling are formed with a simple configuration and improvement in mechanical strength and productivity can be achieved.SOLUTION: A rotor includes a rotor core 1 having salient poles 31 to 34 having trunks 3 around which coils 5 are wound, and insulators 4 arranged and installed at the trunks 3. Respective insulators 4 are formed in inner diameter-side coil guide parts 41, 42 and outer diameter-side coil guide parts 51, 52 formed by protruding in the axial direction Z of a bottom surface part 40, respectively, and in the coil guide parts 41, 42, 51, 52 of each set, through-holes 41a, 51a, 42a, 52a penetrated in the radial direction X are formed at positions opposite to each other, respectively. Supports 6 connecting the coil guide parts 41, 42, 51, 52 in the radial direction X are inserted into the respective through-holes 41a, 51a, 42a, 52a, respectively, and formed therein. The coils 5 are wound around the lower side and the upper side of the supports 6.

Description

  The present invention relates to a rotor and a method for manufacturing a rotor that can form a plurality of cooling air passages with a simple configuration and can improve mechanical strength and productivity.

  Generally, as a winding method of a field winding of a rotary field type synchronous generator which is a kind of rotating electric machine, a method in which a coil bobbin is provided on a magnetic pole core or a magnetic core is insulated and wound is adopted. . In such a system, when both the heat generation of the field winding itself due to the excitation current and the temperature rise of the magnetic pole core act, the entire rotor is heated and exceeds the allowable temperature range of the material used. It becomes difficult to have the necessary functions. For this reason, the method of suppressing the temperature rise of a rotor is conventionally considered.

  For example, conventionally, a cooling air passage is formed between the end surface of the magnetic core and the inner peripheral surface of the guide plate by winding a field winding by applying curved guide plates to both end surfaces of the magnetic core. Prevent overheating of field winding and magnetic core. Further, an insulated wire is wound around the magnetic pole core to form a wire ring, and a spacer is attached between the wire rings or between the wire ring and the magnetic pole iron core so that the wire ring or between the wire ring and the magnetic pole iron core A cooling air passage is formed between them to prevent overheating.

  In another cooling structure, a through hole is provided in the magnetic pole head of the magnetic core, and a coil support bar is fixed through the through hole, and a side U-shaped winding guide insulation member is axially attached to the coil support bar. The structure which forms a cooling air path in a coil end part by stacking two or more is shown (for example, refer to patent documents 1). However, in this configuration, since it is necessary to provide a through hole in the magnetic pole head of the magnetic core, a part of the magnetic core that is a magnetic material is notched, resulting in an increase in magnetic resistance, possibly leading to an increase in the temperature of the rotor. There is. Moreover, in order to insulate the magnetic pole head bottom surface of the magnetic core from the field coil, a separate part may be required.

  In particular, in the case of a salient pole type rotor where the centrifugal force during rotation is large, the coil at the coil end part falls to the outer diameter side, so the bottom face of the magnetic pole core (especially the magnetic pole head and the magnetic pole head) It is necessary to reliably insulate the coil from the corner formed by the bottom surface, and a separate part may be required. Further, the magnetic pole core has the same shape as that of the winding guide insulating member on the bottom surface inside the slot of the magnetic pole core. This is effective for reducing the force applied to the winding guide insulating member even if the number of turns of the coil is increased. However, there is a problem that an air passage that flows in the axial direction cannot be formed in the slot.

  In another conventional case, the shaft hole side wall jig, the outer peripheral side wall jig, the shaft hole side wall jig, and the outer peripheral side wall jig are provided at both ends of each salient pole portion. With an electric winding guide grooved block arranged in series at the four corners of the electric winding, with a wall jig on the shaft hole side, a wall jig on the outer peripheral side, and an electric winding guide groove An aligned winding jig having a structure in which a block can be moved by releasing a bolt or the like is described. With such a configuration, a ventilation path can be provided in the corner portion of the electric winding.

  Furthermore, since the grooved block for guiding the electric winding is used, the density of the winding can be increased, and the temperature rise of the salient pole rotor can be suppressed (for example, see Patent Document 2). However, it is difficult to increase productivity because it is necessary to remove the aligned winding jig. Further, in order to increase the strength of the coil after the aligned winding jig is removed, it is necessary to bind the wire bundle with a thread or a tape. In particular, in the case of a salient pole type rotor where the centrifugal force during rotation is large, the coil at the coil end part falls to the outer diameter side, so the bottom face of the magnetic pole core (especially the magnetic pole head and the magnetic pole head) It is necessary to insulate the coil from the corner portion formed by the bottom surface and the coil, and a separate part may be required.

Japanese Utility Model Publication No. 6-41363 (page 6, "0009", FIG. 3) Japanese Patent Laying-Open No. 2005-80319 (page 4, “0022”, FIGS. 1 and 9)

  In the method of forming the cooling air passages using the guide plates and spacers as described above in the case of the previous stage of the conventional rotor of Patent Document 1, several air passages are formed between the windings, and the cooling efficiency is increased. However, there is a problem with the method of fixing the guide plate and spacer. After winding, the winding bundle needs to be bundled with yarn or tape to compensate for strength stability. was there.

  Further, in the latter stage of the conventional rotor of Patent Document 1, there is a problem that an air passage that flows in the axial direction cannot be formed in the slot.

  Further, in the case of the conventional rotor of Patent Document 2, since it is necessary to remove the aligned winding jig, it is difficult to increase productivity, and the coil after removing the aligned winding jig In order to increase the strength of the wire bundle, it was necessary to bind the wire bundle with yarn or tape. In particular, in the case of a salient pole type rotor where the centrifugal force during rotation is large, the coil at the coil end part falls to the outer diameter side, so the bottom face of the magnetic pole core (especially the magnetic pole head and the magnetic pole head) It is necessary to insulate the coil from the corner portion formed by the bottom surface and the coil, and a separate part may be required. In this case, since it takes time to attach another part, it has been necessary to devise in order to further improve productivity.

  The present invention has been made in order to solve the above-described problems, and forms a plurality of cooling air passages with a simple configuration, and improves mechanical strength and productivity. An object of the present invention is to provide a rotor and a method for manufacturing the rotor.

The rotor of the present invention is
A rotor core in which a plurality of salient poles that protrude in the radial direction and have a body portion around which a coil is wound are formed;
Insulators respectively disposed at the upper and lower ends in the axial direction of each of the body parts;
In the rotor provided with the coil wound around each body part via each insulator,
Each of the insulators includes a bottom surface portion formed on the body portion,
A plurality of sets of inner diameter side coil guide portions and outer diameter side coil guide portions formed to protrude in the axial direction at positions opposed to the inner diameter side and outer diameter side of the bottom surface portion are formed on the bottom surface portion,
In each of the inner diameter side coil guide portion and the outer diameter side coil guide portion of each set, a through-hole penetrating in a radial direction is formed at an opposite position, respectively.
Each through hole of the inner diameter side coil guide portion and the outer diameter side coil guide portion of each set has a support that connects the inner diameter side coil guide portion and the outer diameter side coil guide portion of each set in the radial direction. Formed by inserting,
The coil is wound and formed on the lower side and the upper side of the support at the bottom surface of each insulator.

In addition, the method of manufacturing the rotor configured as described above according to the present invention is as follows.
Winding the coil around the bottom surface of the insulator;
An upper side around which the coil is wound, and a step of disposing a support tool in the through hole of the insulator; and
And a step of winding the coil on the upper side of the support of the insulator.

Since the rotor and the method of manufacturing the rotor of the present invention are configured and performed as described above,
A plurality of cooling air passages can be formed with a simple configuration, and mechanical strength and productivity can be improved.

It is a perspective view which shows the structure of the rotor of Embodiment 1 of this invention. It is a top view of the rotor shown in FIG. The figure which shows the end part of the coil of the one side in the TT line cross section of the rotor shown in FIG. It is a perspective view which shows the structure of the insulator of the rotor shown in FIG. It is the LL sectional view taken on the line of the top view which shows the structure of the insulator of the rotor shown in FIG. 4, a side view, and a side view. It is the top view which showed the outline of the electrical connection in the rotor shown in FIG. It is a perspective view which shows the structure of the insulator of the rotor of Embodiment 2 of this invention. It is a perspective view which shows the structure of the rotor of Embodiment 3 of this invention.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. 1 is a perspective view showing the configuration of a rotor according to Embodiment 1 of the present invention, FIG. 2 is a plan view showing the configuration of the rotor shown in FIG. 1, and FIG. 3 is a T-section of the rotor shown in FIG. FIG. 4 is a perspective view showing the insulator of the rotor shown in FIG. 1, FIG. 5 is a plan view showing the configuration of the insulator shown in FIG. 4, and a side view. FIG. 6 is a cross-sectional view taken along line L-L in the side view, and FIG. 6 is a plan view showing an outline of electrical connection in the rotor shown in FIG.

  In the figure, the rotor core 1 of the salient pole type rotor 100 is configured by laminating a plurality of thin plates in the axial direction Z of the rotation axis of the rotor 100. On both end faces of the rotor core 1 in the axial direction Z, short-circuit plates 2 having the same shape as the rotor core 1 are respectively disposed. The rotor core 1 has four salient poles (also referred to as magnetic poles) 31, 32, 33, and 34 that project in the radial direction. Each salient pole 31, 32, 33, 34 is formed with a body 3 for winding the coil 5. A central hole 7 for inserting a rotation shaft (not shown) is formed at the center.

  Between the salient poles 31, 32, 33, and 34, a slot 11 (see a region surrounded by a dotted line in FIG. 2) that is a space for winding the coil 5 is formed. Further, a hole penetrating in the axial direction Z is formed between the salient poles 31, 32, 33, 34 and the central hole 7, and the bolt 8 and the nut 9 are used to fix the axial direction Z through the hole. Has been done. Insulators 4 are placed on the upper end and the lower end in the axial direction Z of the body 3 of the salient poles 31, 32, 33, 34, respectively. A coil 5 is wound around each salient pole 31, 32, 33, 34 via the insulator 4. The coil 5 is formed by impregnating varnish.

  Next, details of the configuration of the insulator 4 will be described. The insulator 4 is formed of an insulating member, and is manufactured, for example, by resin molding or cutting. And the inner diameter side coil guide parts 41 and 42 formed by projecting in the axial direction Z at the opposite positions of the bottom surface portion 40 formed on the body portion 3 and the inner diameter side X1 and the outer diameter side X2 of the bottom surface portion 40, respectively. A plurality of sets of outer diameter side coil guide portions 51 and 52 are formed on the bottom surface portion 40. The back surface side of the bottom surface portion 40 is formed in a shape that can be fitted onto the body portion 3, and is disposed by being fitted to the body portion 3.

  The inner diameter side coil guide portions 41 and 42 and the outer diameter side coil guide portions 51 and 52 of each set have through holes 41a and 51a that are penetrated in the radial direction X at opposite positions (the same position in the axial direction Z). The through holes 41b and 51b, the through holes 42a and 52a, and the through holes 42b and 52b are formed, respectively. Here, in the set of the inner diameter side coil guide portion 41 and the outer diameter side coil guide portion 51, a plurality of through holes 41a and 41b and through holes 51a and 51b are formed at different positions in the axial direction Z. In the set of the side coil guide portion 42 and the outer diameter side coil guide portion 52, a plurality of through holes 42a, 42b and through holes 52a, 52b are formed at different positions in the axial direction Z.

  The through-holes 41a and 51a, the through-holes 41b and 51b, the through-holes 42a and 52a, and the through-holes 42b and 52b of each set of the inner-diameter side coil guide portions 41 and 42 and the outer-diameter side coil guide portions 51 and 52 Supporters 6 that connect the inner diameter side coil guide portions 41 and 42 and the outer diameter side coil guide portions 51 and 52 in the radial direction X are respectively inserted and formed. Each support 6 includes a pin 60 and a nut 61 that fixes the pin 60. And the length Z1 of the axial direction Z of each through-hole 41a, 41b, 42a, 42b, 51a, 51b, 52a, 52b is each through-hole 41a, 41b, 42a, 42b, 51a, 51b, 52a of the pin 60, It is formed in an elongated hole shape that is longer than the length Z2 in the axial direction Z of the diameter of the portion that penetrates 52b.

  The specific shape of the pin 60 is, for example, a stepped shape having two diameters. In one example, the surface of the inner diameter side coil guide portion 41 that contacts the through hole 41a has a diameter larger than the diameter of the through hole 41a. Further, the narrower diameter portion of the pin 60 is passed through the through hole 51 a of the outer diameter side coil guide portion 51. A male screw is provided at the tip of the pin 60, and the pin 60 can be fixed by tightening the nut 61 from the outer diameter side.

  Further, a concave portion 43 is formed on the upper surface side of the bottom surface portion 40 of the insulator 4. Therefore, the coil 5 formed on the bottom surface portion 40 is configured to be wound across the recess 43. In addition, a plurality of groove portions 46 are formed on the upper surface side of the bottom surface portion 40 so as to match the outer shape of the coil 5. The coil 5 serves as a positioning guide for the coil 5 when the groove portion 46 is wound. It is wound.

  In addition, in each of the inner diameter side coil guide portions 41 and 42 of each insulator 4, introduction grooves 41c and 42c that communicate from the inner diameter side X1 to the outer diameter side X2 and open in the protruding direction are formed. The introduction grooves 41c and 42c are formed with an inclination that the outer diameter side X2 is deeper and the inner diameter side X1 is shallower. The coil 5 is introduced into the bottom surface portion 40 of the insulator 4 from the inner diameter side X1 of the rotor core 1 through the introduction groove 41c of one inner diameter side coil guide portion 41 at each salient pole 31, 32, 33, 34. The winding end of one salient pole 31, 32, 33, 34 is passed from the outer diameter side X <b> 2 of the rotor core 1 through the introduction groove 42 c of the other inner diameter side coil guide portion 42. It is introduced into the inner diameter side X1 and continuously wound.

  And the both ends of the bottom face part 40 of the insulator 4 in the circumferential direction Y protrude in the circumferential direction Y on the inner diameter side X1 and the outer diameter side X2, respectively, and cover the coil 5 in the circumferential direction Y. Portions 44 and 45 and outer diameter side surface coil guide portions 54 and 55 are formed, respectively. As shown in FIG. 2, the formation position a on the inner diameter side of the inner diameter side coil guide portions 44, 45 of the insulator 4 and the outside where the salient poles 31, 32, 33, 34 of the rotor core 1 are not formed. It is formed so as to be in a positional relationship in which the formation position b on the radial side does not overlap in the axial direction Z. This is made possible by forming the formation position b on the outer diameter side where the salient poles 31, 32, 33, 34 of the rotor core 1 are not formed in an arc shape. Therefore, the axial direction Z at this position penetrates and the shaft through hole c is formed.

  Next, a method for manufacturing the rotor of the first embodiment configured as described above will be described. First, the short-circuit plate 2 is disposed on both end faces in the axial direction Z of the rotor core 1 and fixed with bolts 8 and nuts 9. The height of the bolt 8 and the nut 9 in the axial direction Z is set to be lower than the bottom surface of the recess 43 of the insulator 4. Therefore, the flow of the wind in the radial direction X by the recess 43 is not hindered. In addition, you may use the structure methods other than the volt | bolt 8 and the nut 9, for example, the method of performing lamination | stacking fixation by welding etc., without making a hole. Next, the bottom surface portion 40 of the insulator 4 is inserted and fixed on the body portion 3 of each salient pole 31, 32, 33, 34 of the rotor core 1.

  Next, the winding operation of the coil 5 will be described with reference to FIG. First, the coil 5 is placed on the first salient pole 31 in a state where the winding start portion 5a of the coil 5 is placed along the introduction groove 42c of the inner diameter side coil guide portion 42 of the insulator 4 and the winding start portion 5a is released to the inner diameter side. Is wound by a predetermined number of turns. Next, the coil 5 is locked to the introduction groove 41 c of the inner diameter side coil guide portion 41 different from the inner diameter side coil guide portion 42 into which the coil 5 has been introduced, and the second salient pole adjacent from the salient pole 31. 32, the coil 5 is wound along the introduction groove 42c of the inner diameter side coil guide portion 42 of the salient pole 32 via the transition portion 5b of the coil 5, and the coil 5 is wound around the second salient pole 32 by a predetermined number of turns. .

  Next, the coil 5 is locked to the introduction groove 41c of the inner diameter side coil guide portion 41 different from the inner diameter side coil guide portion 42 into which the coil 5 is introduced, and the third salient pole adjacent from the salient pole 32 is obtained. 32, the coil 5 is wound along the introduction groove 42c of the inner diameter side coil guide portion 42 of the salient pole 33 through the transition portion 5c of the coil 5, and the coil 5 is wound around the third salient pole 33 by a predetermined number of turns. . Next, the coil 5 is locked to the introduction groove 41c of the inner diameter side coil guide portion 41 different from the inner diameter side coil guide portion 42 into which the coil 5 is introduced, and the fourth salient pole adjacent from the salient pole 33 is obtained. 34, the coil 5 is wound along the introduction groove 42c of the inner diameter side coil guide portion 42 of the salient pole 34 via the transition portion 5d of the coil 5, and the coil 5 is wound around the fourth salient pole 34 by a predetermined number of turns. . Finally, the coil 5 is locked to the introduction groove 41c of the inner diameter side coil guide portion 41 different from the inner diameter side coil guide portion 42 into which the coil 5 has been introduced, and the coil 5 is cut as the winding end portion 5e. .

  The direction of the arrow shown in FIG. 6 indicates the winding direction of the coil 5. Therefore, the salient pole 31 and the salient pole 33 are wound with the coil 5 in the same direction, and the salient pole 32 and the salient pole 34 are wound with the coil 5 in the opposite direction to the salient pole 31. Since the rotor 100 is thus configured, the coil 5 is continuously wound around the salient poles 31, 32, 33, and 34 without being cut halfway.

  Next, a method for manufacturing the end portion of the coil 5 of each of the salient poles 31, 32, 33, 34 in the winding work of the coil 5 will be described with reference to FIG. The coil 5 introduced from the introduction groove 42c is wound a predetermined number of times so as to straddle the concave portion 43 of the bottom surface portion 40 of the insulator 4 in a predetermined direction. Thereby, the 1st coil group 50a is formed and the 1st ventilation path A penetrated to the radial direction X between the 1st coil group 50a and the recessed part 43 of the insulator 4 is formed.

  Next, the support 6 is inserted into the insulator 4. First, the pin 60 is inserted so as to connect the through hole 41 a of the inner diameter side coil guide portion 41 and the through hole 51 a of the outer diameter side coil guide portion 51 in the radial direction X. Then, the support 61 is fixed by tightening the nut 61 to the male screw formed at the tip of the pin 60. Similarly, the pin 60 is inserted so as to be connected in the radial direction X to the through hole 42 a of the inner diameter side coil guide portion 42 and the through hole 52 a of the outer diameter side coil guide portion 52, and the nut 61 is tightened to support 6. To fix. At this time, the pin 60 is not in contact with the first coil group 50a and has a gap. Next, the second coil group 50b is wound so as to straddle the two support tools 6 in the circumferential direction Y, the second coil group 50b formed on the upper side of the support tool 6, and the lower part of the support tool 6 A second ventilation path B is formed between the first coil group 50a formed on the side.

  Next, the through hole 41b of the inner diameter side coil guide portion 41 and the through hole 51b of the outer diameter side coil guide portion 51 are penetrated, and the through hole 42b of the inner diameter side coil guide portion 42 and the outer diameter side coil guide portion 52 are penetrated. Similarly, the pin 60 is inserted so as to connect the hole 52b in the radial direction X, the nut 61 is tightened, and the support 6 is fixed. Next, the third coil group 50c is wound so as to straddle the two support tools 6 in the circumferential direction Y, the third coil group 50c formed on the upper side of the support tool 6, and the lower part of the support tool 6 A third ventilation path C is formed between the second coil group 50b formed on the side.

  At this time, as shown in FIG. 3, gaps L1 and L2 are provided between the pin 60 and the first coil group 50a and between the pin 60 and the second coil group 50b, but this gap should not be provided. Is also possible. In this case, the ventilation path becomes narrow, but when more coils are wound, the force applied to the pin 60 can be reduced. If more coils are wound, the current density becomes smaller, and the effect of suppressing the heat generation of the rotor can be expected. Therefore, the more advantageous one may be selected depending on the specifications of the rotor to be used.

  As shown in FIG. 3, the end portion of the coil 5 (the coil 5 at the portion protruding in the axial direction Z from the rotor core 1) includes the first coil group 50a, the second coil group 50b, and the third coil group 50c. These coils 5 are wound continuously without being cut. And each coil group 50a, 50b, 50c has the clearance gap by the recessed part 43 and the support tool 6, and this clearance gap has become each ventilation path A, B, and C. FIG. Therefore, the coil 5 can be continuously wound around the salient pole 31 and the ventilation paths A, B, and C can be formed. Next, the rotor 100 can be configured by impregnating the entire coil 5 with varnish.

  According to the rotor of the first embodiment configured as described above, it is possible to form a gap (second and third ventilation paths) in the coil by inserting a support tool into the insulator, thereby improving the cooling performance. It is possible. In addition, even when a plurality of coil groups are formed within one salient pole, the coils can be continuously wound without having to cut the coils for each coil group. Compared with, the wiring work time can be shortened.

  Furthermore, since a plurality of support tools are formed at positions where the heights in the axial direction are different, there are a plurality of gaps, and the cooling performance can be further improved.

  Further, since the support is formed of a pin and a nut and the outer diameter side coil guide portion and the inner diameter side coil guide portion are fixed, the rigidity of the insulator is increased. Thus, even if a centrifugal force is generated when the rotor rotates, the force can be received by the insulator, and there is no need to fix the coil end portion with a string or a thread of another means. Moreover, damage to the insulator and contact between the coil and the rotor core can be prevented, and durability is improved.

  In addition, since the axial length of the through hole of the insulator is longer than the axial length of the pin, variations in the wire diameter of the coil can be allowed, and the production yield is improved.

Moreover, since the recessed part was provided in the bottom face part of the insulator, the 1st ventilation path can be formed in a coil and a cooling performance can be improved further.
Furthermore, since the concave portion is provided in the insulator and the first ventilation path is formed, the varnish is likely to penetrate into the coil in the operation of impregnating the varnish as compared with the case where there is no concave portion. Thereby, varnish can be impregnated uniformly in the whole coil, and it is possible to improve insulation performance, coil rigidity, and cooling performance.

  In addition, since the length of the outer diameter side side coil guide portion (inner diameter side side coil guide portion) is set in the circumferential direction of the insulator so as to cover the entire area where the coil is wound, the rotor is rotated. Even if centrifugal force works in the outer diameter direction in this case, the rigidity of the insulator is strong and there is no need to fix the coil end with a string or a thread.

  Further, since the shaft through hole is formed in the slot portion of the rotor core, the cooling performance can be improved.

Moreover, it can introduce | transduce into the inner diameter side coil guide part of an insulator from the introduction groove | channel of a coil, and can let a coil | winding start part escape to a radial inside from a introduction groove | channel, and can wind a coil continuously.
Further, since the winding end portion can be locked in the introduction groove, it is possible to prevent the coil that has been wound once from being unwound.

  In addition, since the introduction groove has a shape that tilts toward the inner diameter side, interference with the coil wound around the winding start portion and the body portion can be avoided, and the alignment of the coil can be improved. Can do.

  Furthermore, the winding start part of one salient pole is arranged in the introduction groove of one inner diameter side coil guide part, the winding end is arranged in the introduction groove of the other inner diameter side coil guide part, and the coil is adjacent without cutting. The winding that starts winding of the other salient pole is arranged in the introduction groove of one inner diameter side coil guide part for all salient poles and the coil is cut for all salient poles. Since the coil is continuously wound without being connected, the time for the connection process can be shortened as compared with the case where the coil is cut for each salient pole.

  Moreover, since the groove part matched with the external shape of the coil is formed in the bottom face part of the insulator, it is easy to align and wind the coil around the insulator, and the density of the coil can be increased. Therefore, since this winding does not require an aligned winding jig as in the prior art, it is not necessary to remove the aligned winding jig after winding, so that productivity can be improved.

  Moreover, since the axial height of the inner diameter side coil guide portion is higher than the height of the coil end, the insulation distance can be greatly increased, and no special insulation treatment is required for the coils connecting the salient poles. Thereby, the material cost and labor which are required for insulation processing can be controlled.

  In the first embodiment, the example in which the two inner diameter side coil guide portions and the outer diameter side coil guide portion are formed on the inner diameter side and the outer diameter side of the bottom surface portion is shown. However, the present invention is not limited to this. It is also possible to form three or more sets, which is effective when the rotor core is large.

  Moreover, although the example which forms a through-hole in the position where axial directions differ in an inner diameter side coil guide part and an outer diameter side coil guide part in two places was shown, it is not restricted to this, A ventilation hole is provided in one place. It can be formed, and the same effect can be obtained. Further, if through holes are formed at three or more locations, more ventilation holes can be formed. The number of locations can be appropriately set according to the cooling performance and the number of turns of the coil.

Embodiment 2. FIG.
FIG. 7 is a perspective view showing the configuration of the insulator of the rotor according to Embodiment 2 of the present invention. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Each of the inner diameter side surface coil guide portions 44 and 45 and the outer diameter side surface coil guide portions 54 and 55 formed at positions facing each other in the circumferential direction Y has side surface through holes penetrating in the radial direction X at the opposite positions. 44a and 54a and side surface through holes 45a and 55a are formed. Further, the inner diameter side surface coil guide portions 44 and 45 and the outer diameter side surface coil guide portions 54 and 55 at the opposite positions in the circumferential direction Y have side surface through holes 44a and 54a and side surface through holes 45a and 55a. A side support (not shown) that connects the coil guide portions 44 and 45 and the outer diameter side side coil guide portions 54 and 55 in the radial direction is inserted and formed. The coil 5 is wound on the upper side of the side support between the inner diameter side side coil guide portions 44 and 45 and the outer diameter side side coil guide portions 54 and 55 of each insulator 4.

  Each side support is composed of a side pin on which a male screw is formed and a side nut fixed with the male screw of the side pin, and is formed so that it can be inserted into and removed from the side through holes 44a and 54a and the side through holes 45a and 55a. ing. Further, the length in the circumferential direction Y of the side surface through-holes 44a, 45a, 54a, 55a is longer than the length in the circumferential direction Y of the diameter of the portion penetrating the side surface through-holes 44a, 45a, 54a, 55a of the side surface pin. ing. Each insulator 4 is formed with an inner diameter side rib portion 47 that connects the inner diameter side coil guide portions 41, 42 and an outer diameter side rib portion 57 that connects the outer diameter side coil guide portions 51, 52. Yes. And the position of the axial direction Z of the inner diameter side rib part 47 and the outer diameter side rib part 57 is formed at a position different from the position of the through hole 41a, 41b, 42a, 42b, 51a, 51b, 52a, 52b in the axial direction Z. Has been.

  When the insulator of the rotor of the second embodiment configured as described above is manufactured in the same manner as in the first embodiment, it is supported by the through holes 41a and 51a and the through holes 42a and 52a shown in the first embodiment. At the same time when the tool 6 is inserted, the side pins and the side nuts of the side support tools are inserted and mounted in the side through holes 44a and 54a and the side through holes 45a and 55a in the same manner as in the first embodiment. And like the said Embodiment 1, the coil 5 is wound by the upper part side of this side surface support tool, the clearance gap in the axial direction of the coil 5 is opened, and a ventilation path can be formed.

  According to the rotor of the second embodiment configured as described above, the same effect as that of the first embodiment can be obtained. In the first embodiment, a ventilation path is provided at the end portion of the coil. However, in the second embodiment, in addition to this, a ventilation path is also formed in the slot portion, so that the cooling performance can be improved.

  Moreover, since the inner diameter side coil guide portion and the outer diameter side coil guide portion can be screw-fixed with side pins and side nuts as side supports, the inner diameter side coil guide portion and outer diameter side guide portion can be The rigidity can be increased. For this reason, it can suppress that the outer diameter side side coil guide part bends with the force of a coil, and the distance with the head of the salient pole of a rotor core becomes near.

  Further, since the circumferential length of the side through-hole is formed longer than the circumferential length of the diameter of the portion penetrating the side through-hole of the side pin, variation in the wire diameter of the side coil can be allowed. , Production yield is improved.

  Further, since the outer diameter side coil guide portions are connected to each other by the outer diameter side rib and the inner diameter side coil guide portions are connected to each other by the inner diameter side rib, the rigidity of the outer diameter side coil guide portion and the inner diameter side coil guide portion can be increased. it can. Thereby, the bending at the time of winding of a coil and the bending by the centrifugal force at the time of rotation can be made small.

  In addition, the axial position of the inner diameter side rib and the outer diameter side rib is formed at an axial position different from the axial position of the through hole provided in each coil guide portion, and therefore the ventilation formed by the support tool. Does not block the road. For this reason, it is possible to obtain a rotor in which the cooling performance is not easily lowered while increasing the rigidity of each coil guide portion.

  In the second embodiment, an example in which both the inner diameter side rib portion and the outer diameter side rib portion are provided has been described. However, the present invention is not limited to this and may be formed in at least one of them. . If any one of them is formed, the rigidity can be increased as compared with the case where these are not formed.

Embodiment 3 FIG.
FIG. 8 is a perspective view showing the configuration of the rotor according to the third embodiment of the present invention. In the figure, the same parts as those in the above embodiments are denoted by the same reference numerals, and description thereof is omitted. A connector 62 for connecting the bottom surface portion 40 of the insulator 4 and the upper end portion and the lower end portion in the axial direction Z of the rotor core 1 is provided. Specifically, the connecting tool 62 has, for example, a Z shape and is provided with a hole. Then, the coupling tool 62 is fixed by tightening the bolt 8 used for stacking and fixing the rotor core 1 with the nut 9 through the hole of the coupling tool 62. The connector 62 is formed in a shape that comes into contact with the bottom surface portion 40 of the insulator 4, and is fixed by the bolt 8 to fix the position of the insulator 4 in the axial direction Z.

  According to the rotor of the third embodiment configured as described above, the outer diameter side coil guide can be obtained by the centrifugal force when the rotor rotates, as well as the same effects as those of the above embodiments. Even if the portion is bent in the outer diameter side direction, it can be firmly fixed by the connector, so that the floating of the insulator can be suppressed. If the insulator is floated, this can be prevented from being bent in the outer diameter direction and interfering with a component (usually a stator) arranged on the outer diameter side of the rotor.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

1 rotor core, 11 slots, 100 rotor, 2 short-circuit plate, 3 fuselage,
31 salient poles, 32 salient poles, 33 salient poles, 34 salient poles, 4 insulators,
40 bottom surface part, 41 inner diameter side coil guide part, 41a through hole, 41b through hole,
41c introduction groove, 42 inner diameter side coil guide portion, 42a through hole, 42b through hole,
42c introduction groove, 43 recess, 44 inner diameter side coil guide,
45 Inner diameter side coil guide, 46 Groove, 47 Inner diameter rib, 5 Coil,
5a winding start part, 5b transition part, 5c transition part, 5d transition part,
5e winding end portion, 50a first coil group, 50b second coil group,
50c 3rd coil group, 51 outer diameter side coil guide part, 51a through-hole,
51b through hole, 52 outer diameter side coil guide, 52a through hole, 52b through hole,
54 outer diameter side coil guide, 55 outer diameter side coil guide,
57 outer diameter side rib part, 6 support tool, 60 pin, 61 screw, 62 connection tool,
7 Center hole, 8 bolt, 9 nut, A 1st ventilation path, B 2nd ventilation path,
C 3rd ventilation path, a formation position, b formation position, c axial through-hole, X radial direction,
X1 inner diameter side, X2 outer diameter side, Y circumferential direction, Z axis direction.

Claims (22)

A rotor core in which a plurality of salient poles that protrude in the radial direction and have a body portion around which a coil is wound are formed;
Insulators respectively disposed at the upper and lower ends in the axial direction of each of the body parts;
In the rotor provided with the coil wound around each body part via each insulator,
Each of the insulators includes a bottom surface portion formed on the body portion,
A plurality of sets of inner diameter side coil guide portions and outer diameter side coil guide portions formed to protrude in the axial direction at positions opposed to the inner diameter side and outer diameter side of the bottom surface portion are formed on the bottom surface portion,
In each of the inner diameter side coil guide portion and the outer diameter side coil guide portion of each set, a through-hole penetrating in the radial direction is formed at an opposite position, respectively.
Each through hole of each inner diameter side coil guide portion and each outer diameter side coil guide portion includes a support that connects the inner diameter side coil guide portion and each outer diameter side coil guide portion of each set in the radial direction. Formed by inserting,
The said coil is the rotor currently wound by the lower part side of the said support tool, and the upper part side in the said bottom face part of each said insulator. Each of the inner diameter side coil guide portions and the outer diameter side coil guide portions of each set has a plurality of through holes at different axial heights, and the support is inserted into each of the through holes. The rotor according to claim 1, which is formed as described above. Each said support implement is comprised with the pin in which the external thread is formed, and the nut fixed with the external thread of the said pin, and is formed so that insertion / extraction is possible in the said through-hole. Rotor. 4. The rotor according to claim 3, wherein the length of each through hole in the axial direction is longer than the length in the axial direction of the diameter of the pin that passes through the through hole. Each of the insulators is formed with at least one of an inner diameter side rib portion connecting the inner diameter side coil guide portions and an outer diameter side rib portion connecting the outer diameter side coil guide portions. The rotor according to claim 4. The rotor according to claim 5, wherein an axial position of at least one of the inner diameter side rib part and the outer diameter side rib part is formed at a position different from an axial position of the through hole. On the upper surface side of the bottom surface portion of each insulator, a recess is formed,
The rotor according to any one of claims 1 to 6, wherein the coil is wound and formed across the concave portion in the bottom surface portion of each insulator. At both ends in the circumferential direction of the bottom surface portion of each insulator, the inner diameter side side coil guide portion and the outer diameter side surface coil protrude at the inner diameter side and the outer diameter side in the circumferential direction and cover the coil in the circumferential direction. The rotor according to any one of claims 1 to 7, wherein guide portions are respectively formed. In each of the inner diameter side surface coil guide portion and the outer diameter side surface coil guide portion formed at positions facing each other in the circumferential direction, side surface through holes penetrating in the radial direction are formed at the opposite positions,
The inner diameter side surface coil guide portion and the outer diameter side surface coil guide portion have a diameter in each of the side surface through-holes of the inner diameter side surface coil guide portion and the outer diameter side surface coil guide portion that are opposed to each other in the circumferential direction. Each side support connecting in the direction is inserted and formed,
The rotor according to claim 8, wherein the coil is wound on the upper side of the side support member between the inner diameter side surface coil guide portion and the outer diameter side surface coil guide portion of each insulator. . Each said side surface support tool is comprised by the side surface pin in which the male screw is formed, and the side surface nut fixed with the said male screw of the said side surface pin, and is formed so that insertion or extraction is possible in the said side surface through-hole. Rotor. 11. The rotor according to claim 10, wherein a length in a circumferential direction of the side surface through hole is longer than a length in a circumferential direction of a diameter of a portion penetrating the side surface through hole of the side surface pin. The formation position on the inner diameter side of the inner diameter side coil guide portion of the insulator,
The rotor according to any one of claims 8 to 11, wherein the rotor core is formed at a position that does not overlap in the axial direction with a formation position on the outer diameter side where the salient pole is not formed. . Each of the inner diameter side coil guide portions of the insulators is formed with an introduction groove that communicates from the inner diameter side to the outer diameter side and opens in the protruding direction.
In each salient pole, the coil is introduced and wound from the inner diameter side of the rotor core to the bottom surface portion of the insulator through the introduction groove of one inner diameter side coil guide portion. The end of winding of the pole is introduced from the outer diameter side of the rotor core to the inner diameter side of the rotor core through the introduction groove of the other inner diameter side coil guide portion and continuously wound. The rotor according to claim 12. The rotor according to claim 13, wherein the introduction groove is formed with an inclination in which an outer diameter side is deeper and an inner diameter side is shallower. The rotor according to any one of claims 1 to 14, wherein a plurality of grooves matching the outer shape of the coil are provided on an upper surface side of the bottom surface. The rotor according to any one of claims 1 to 15, further comprising a connector for connecting the bottom surface portion of the insulator and an upper end portion and a lower end portion in the axial direction of the rotor core. The rotor according to any one of claims 1 to 16, wherein the coil is formed by impregnating varnish. In the manufacturing method of the rotor according to any one of claims 1 to 17,
Winding the coil around the bottom surface of the insulator;
An upper side around which the coil is wound, and a step of disposing a support tool in the through hole of the insulator; and
And a step of winding the coil around the upper side of the support of the insulator. In the manufacturing method of the rotor according to claim 2,
Winding the coil around the bottom surface of the insulator;
Repeating the step of disposing the support member through the through hole of the insulator and the step of winding the coil on the upper side of the support member of the insulator. The manufacturing method of the rotor provided with the process to perform. In the manufacturing method of the rotor according to any one of claims 9 to 11,
Winding the coil around the bottom surface of the insulator;
An upper side around which the coil is wound, and the step of disposing the support member in the through hole of the insulator and the side surface support member through the side surface through hole,
And a step of winding the coil around an upper side of the support and the side support of the insulator. In the manufacturing method of the rotor according to claim 13 or 14,
Introducing the coil from the inner diameter side of the rotor core to the bottom surface of the insulator through the introduction groove, and winding the coil;
An upper side around which the coil is wound, and the step of disposing the support through the through hole of the insulator;
Winding the coil on the upper side of the support of the insulator and deriving the coil from the bottom surface side of the insulator to the inner diameter side of the rotor core via the introduction groove. Production method. The method for manufacturing a rotor according to claim 21, wherein the winding of the coil of each insulator is continuously performed through the introduction groove.

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