JP4884852B2 - A pair of upper and lower resolver covers used in a rotating machine - Google Patents

Description

  The present invention relates to a pair of upper and lower resolver covers used for a rotating machine, and more particularly to a pair of upper and lower resolver covers for covering a resolver stator constituting a resolver used for a rotating machine from above and below.

  A resolver is used as a rotation sensor that detects the rotational position of a rotating shaft in a rotating machine such as an electric motor or a generator. As is well known, the resolver includes a resolver stator in which a plurality of measurement excitation coils are arranged at a predetermined pitch, a resolver rotor arranged to surround the resolver stator, and a first detection coil. And a second detection coil. Then, when the resolver rotor rotates with the measurement reference signal being output to the measurement excitation coil, the interval between the resolver rotor and the resolver stator changes, so that the resolver from the first detection coil and the second detection coil. The rotation position of the rotating shaft connected to the resolver rotor is detected using the output of a signal corresponding to the position of the rotor.

  This resolver is greatly affected by the accuracy of the rotational position detected by variations in windings of the excitation coil, the first detection coil, the second detection coil, and the like. Therefore, the winding gland of the resolver is wound precisely so as to withstand the measurement accuracy, and the state is covered with a cover so as not to be disturbed by an external force or subsequent work. This cover is called a resolver cover or a resolver stator cover.

  For example, Patent Document 1 discloses a rotation detection stator structure in which a stator winding is wound around a plurality of magnetic poles, and a ring-shaped stator body as a whole and first and second ring-shaped winding covers that cover the stator winding. In US Pat. No. 6,057,831, it is disclosed that the struts or locking projections of one ring-shaped winding cover are coupled via the recesses of the other ring-shaped winding cover or the taper of the cylindrical projection.

  In Patent Document 2, first and second ring-shaped insulating caps formed in a ring shape are disposed on both end faces of a ring-shaped stator in which a stator winding is wound around each of a plurality of magnetic poles. It is stated that the outer peripheral height of each outer peripheral wall is higher than the winding height of the stator winding portion.

  Patent Document 3 discloses that the first cover and the second cover that cover the resolver stator from both sides can be hooked on a screw fixing bracket provided on the outer periphery of the resolver stator on the flange portion of the first cover. It is disclosed that a plurality of such engaging members are provided, and a stopper that prohibits movement of the engaging member of the first cover from the screw fixing bracket is provided on the flange portion of the second cover. Thus, it is stated that only when the second cover is removed, the first cover can be removed from the resolver stator, and when the resolver stator is assembled to the rotating machine, it can be prevented from being reversed and assembled. .

JP 2004-135402 A JP 2005-201732 A JP 2005-315645 A

  As described above, the resolver cover in the prior art is intended to cover the winding state of the resolver's winding gland so as not to be disturbed by external force, subsequent work, etc. It is insufficient as an external dustproof measure. For example, even if a resolver cover is used when the resolver is mounted on a rotating machine, it is not sufficient to prevent foreign matter from being caught between the teeth of the resolver stator in the actual measurement state. is there. In particular, in the case of a structure in which oil for lubrication or cooling is circulated inside the rotating machine, if foreign matter is included in the circulating fluid, it will enter the resolver through the opening gap of the resolver cover. This may affect the rotational position accuracy of the resolver.

  In order to prevent foreign substances from entering the resolver, it is conceivable to seal the resolver itself by integrally molding it with resin or the like. However, as described above, the rotational position accuracy of the resolver is in the winding state. Since it is sensitive and the winding state may change due to the pressure during resin molding, it is difficult to use the resin molding as it is.

  An object of the present invention is to provide a pair of upper and lower resolver covers used in a rotating machine that can suppress the entry of foreign matter into the resolver.

A pair of upper and lower resolver covers used in the rotating machine according to the present invention is provided to cover a resolver stator constituting a resolver used in a rotating machine having a structure using a medium fluid for lubrication or cooling from above and below in the rotating machine. A pair of upper and lower resolver covers, wherein at least one of the resolver covers is disposed in a gap on the inner peripheral side of the resolver stator and is combined and integrated with a corresponding portion of the other resolver cover; foreign particles in the fluid have a foreign matter preventing wall that prevents from entering the interior of the resolver, when a pair of upper and lower resolver cover is integrated with the winding of the inner surface side and the resolver stator in each resolver cover during, characterized in that it have a gap to the extent that the resolver cover and windings are not in contact.

The pair of upper and lower resolver covers used in the rotating machine according to the present invention covers from above and below the resolver stator constituting the resolver used in the rotating machine having a structure that uses a medium fluid for lubrication or cooling inside the rotating machine. A pair of upper and lower resolver covers, each of which is inserted in a gap between adjacent phase windings in a gap between teeth of a resolver stator; And a foreign matter prevention wall portion disposed in a gap on the inner peripheral side of the resolver stator, and arranged so that the partition portion of the upper resolver cover and the partition portion of the lower resolver cover are integrated correspondingly is, when the foreign object preventing wall portion of the upper resolver cover and the foreign matter preventing wall portion of the lower resolver cover are integrated correspondingly, foreign materials contained in the medium fluid Has a foreign matter preventing wall that prevents from entering the interior of the resolver, when a pair of upper and lower resolver cover is integrated between the windings of the inner surface side and the resolver stator in each resolver cover, and the resolver cover wherein the windings are arranged to have a gap so as not to contact.

  Moreover, it is preferable that the pair of upper and lower resolver covers according to the present invention include engaging means provided on the surfaces where the partitioning portion of the upper resolver cover and the partitioning portion of the lower resolver cover face each other.

  Moreover, it is preferable that a foreign material prevention wall part is each arrange | positioned in the clearance gap between adjacent insulators about the insulator each provided in the front-end | tip of each tooth | gear of a resolver stator.

  With at least one of the above-described configurations, the resolver cover on at least one side is disposed in the gap on the inner peripheral side of the resolver stator, and has a foreign matter prevention wall that is combined and integrated with a corresponding part of the resolver cover on the other side. Therefore, by covering the resolver with the upper and lower resolver covers, the foreign matter preventing wall is disposed in the inner circumferential side gap of the resolver stator, so that foreign matter can be prevented from entering the stator. Intrusion of foreign matter into the stator includes foreign matter entering into a gap between adjacent salient poles of the stator core, entry of foreign matter into the stator through the gap, and the like.

  Further, according to at least one of the above-described configurations, each of the pair of upper and lower resolver covers is inserted into a gap between adjacent phase windings in a gap between teeth of the resolver stator, A foreign matter prevention wall portion connected to the partition portion and disposed in the clearance on the inner peripheral side of the resolver stator, so that the partition portion of the upper resolver cover and the partition portion of the lower resolver cover are integrated correspondingly The foreign matter prevention wall portion of the upper resolver cover and the foreign matter prevention wall portion of the lower resolver cover are arranged so as to be integrated correspondingly. Therefore, by covering the resolver with the upper and lower resolver covers, the foreign matter prevention wall is disposed in the gap on the inner peripheral side of the resolver stator, so that foreign matter can be prevented from entering the stator.

  Moreover, since the partition part of the upper resolver cover and the partition part of the lower resolver cover have the engaging means provided on the mutually facing surfaces, the upper and lower resolver covers can be integrated with a simple configuration. In addition, it is possible to prevent the positional relationship between the upper and lower resolver covers from shifting.

  Further, since the foreign matter prevention wall portion is disposed in the gap between the adjacent insulators at the tips of the teeth of the resolver stator, the foreign matter can be prevented from entering the stator.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the resolver is described as using a 10-pole resolver stator, but the number of poles is an example for explanation, and other pole numbers may be used. Further, the arrangement relationship between the resolver stator and the upper and lower resolver covers in the following is an example for explanation, and can be appropriately set according to the specifications of the resolver or the rotating machine in which it is used.

  FIG. 1 is a diagram illustrating a state in which a pair of upper and lower resolver covers 20 and 40 are assembled so as to cover the resolver stator 10. 1A shows a configuration of the resolver stator 10, FIG. 1B shows a state immediately before the upper resolver cover 20 and the lower resolver cover 40 are assembled to the resolver stator 10, and FIG. 1C shows a resolver. It is a figure which shows the state by which the upper resolver cover 20 and the lower resolver cover 40 were each assembled | attached on the upper and lower sides of the stator 10 as a pair of upper and lower resolver cover.

  The resolver stator 10 is a component that constitutes a resolver for detecting the rotational position of a rotating shaft connected to the resolver rotor together with a resolver rotor (not shown). The resolver is incorporated in a rotating machine (not shown), and the rotating shaft of the rotating machine is connected to the resolver rotor. The resolver stator 10 includes a magnetic stator core 12 having a plurality of salient poles 14 and a winding 16 wound around each salient pole 14. The salient poles 14 are also called teeth. In FIG. 1, since ten salient poles 14 are shown, this is the stator core 12 used in the 10-pole resolver stator 10. The tips of the ten salient poles 14 are separated from each other, and there is a space called a gap 15 between the windings 16 wound around the adjacent salient poles 14. The stator core 12 of FIG. 1 also shows a plurality of mounting slots and the like for positioning and mounting on a rotating machine not shown here.

  The upper resolver cover 20 and the lower resolver cover 40 are shown here as having substantially similar shapes and dimensions. The difference is that the upper resolver cover 20 and the lower resolver cover 40 are engaged with each other, as will be described later. In FIG. 1B, the state of the lower resolver cover 40 is often observed as compared with the upper resolver cover 20. That is, the lower resolver cover 40 is an annular member, and a plurality of protrusions are provided from the annular main body. These protrusions are provided at positions corresponding to the gaps 15 of the stator core 12, and are respectively connected to the partition portions 42 disposed between adjacent windings, and between the tips of the salient poles 14. The structure includes a foreign matter prevention wall 44 disposed in each gap. That is, corresponding to the 10-pole resolver stator 10, 10 foreign matter prevention walls 44 and 10 partition portions 42 are provided on the lower resolver cover 40. Similarly, the upper resolver cover 20 is also provided with ten foreign matter prevention walls 24 and ten partition portions 22.

  Then, as shown in FIG. 1 (c), the upper resolver cover 10 and the lower resolver cover 40 are combined to cover the resolver stator 10 from above and below, so that the foreign matter prevention wall 24 of the upper resolver cover 20 and the lower resolver cover are covered. Forty foreign object prevention walls 44 are integrated so as to face each other and fill a gap between adjacent salient poles 14 of the stator core 12. This prevents foreign matter from being caught in the gap between adjacent salient poles 14 or entering the stator core 12 from the gap. The name of the foreign matter prevention wall is given for its function.

  FIG. 2 is a plan view of a pair of upper and lower resolver covers. 2A is a plan view of the upper resolver cover 20, and FIG. 2B is a plan view of the lower resolver cover 40, which are shown to be completely the same in the drawing. The difference is that the engagement pin 26 is provided in the upper resolver cover 20, whereas the engagement hole 46 corresponding to the engagement pin 26 is provided in the lower resolver cover 40. Other shapes, dimensions, and materials are the same between the upper resolver cover 20 and the lower resolver cover 40. Therefore, here, the structure of the upper resolver cover 20 will be described as a representative. Note that, in the upper resolver cover 20 and the lower resolver cover 40, the same elements are indicated by the same last digit of the reference numerals.

  The upper resolver cover 20 is a member for covering the upper side of the resolver stator 10. The upper resolver cover 20 includes an annular main body 21, a plurality of partition parts 22 that protrude upward from the main body part 21 and extend in the radial direction, and foreign matter prevention that is connected to each partition part 22 and provided on the inner diameter side. The wall 24 includes an engagement pin 26 provided on the foreign matter prevention wall 24, an inner edge portion 27 on the inner diameter side, and an outer edge portion 28 on the outer diameter side.

  As described with reference to FIG. 1, the partition 22 is provided at a position corresponding to the gap 15 that is a space between the adjacent windings 16 in the resolver stator 10. That is, the circumferential thickness of the partition 22 is set to be sufficiently smaller than the circumferential dimension of the gap 15. The height of the partition portion 22 from the inner surface of the main body portion 21 is such that the sum of the heights from the main body portion formed when the upper resolver cover 20 and the lower resolver cover 40 are combined is higher than the height of the winding 16. Set small enough. Here, the sufficiently small thickness and height of the partitioning portion 22 take into account the dimensional accuracy of the upper resolver cover 20 and the lower resolver cover 40 and the assembly accuracy when the upper resolver cover 20 and the lower resolver cover 40 are combined. Even so, it means that there is a sufficient margin not to contact the winding 16.

  As described with reference to FIG. 1, the foreign matter prevention wall 24 is provided at a position corresponding to the gap between the salient poles 14 adjacent to each other in the resolver stator 10. That is, the circumferential width of the narrowest part of the foreign matter prevention wall 24 is substantially the same as the circumferential dimension of the gap between the adjacent salient poles 14 and is set slightly shorter. The height of the foreign matter prevention wall 24 from the inner surface of the main body portion 21 is preferably the same as that of the partition portion 22. Therefore, when the upper resolver cover 20 and the lower resolver cover 40 are combined, when the partitioning portions 22 and 42 that face each other come into contact with each other, the foreign matter prevention walls 24 and 44 that face each other also come into contact with each other.

  The engagement pin 26 and the engagement hole 46 fit into each other, and have a function of positioning and integrating the upper resolver cover 20 and the lower resolver cover 40. Therefore, the outer shape of the engagement pin 26 corresponds to the inner shape of the engagement hole 46 with a dimensional difference in fit. When the shapes of the engagement pin 26 and the engagement hole 46 are both circular, the fit is preferably a stop fit or a crimp fit. In FIG. 2, the engagement pin 26 is provided in the upper resolver cover 20 and the engagement hole 46 is provided in the lower resolver cover 40. Further, although the engaging pin 26 and the engaging hole 46 are also received by the foreign matter prevention walls 24 and 44, the engaging pin 26 and the engaging hole 46 may be provided on the partition portions 22 and 42. It is good also as what is provided in.

  FIG. 3 is a diagram for explaining the positional relationship when the upper resolver cover 20 and the lower resolver cover 40 are mounted in the resolver stator 10. Here, the positions of the elements of the upper resolver cover 20 and the lower resolver cover 40 are indicated by broken lines. As described with reference to FIGS. 1 and 2, the partition portions 22 and 42 are respectively disposed in the gaps 15 that are spaces between the adjacent windings 16, and the foreign matter prevention walls 24 and 44 are adjacent to the salient poles 14. It is arrange | positioned in the clearance gap between.

  4-7 is a figure explaining the relationship between the partition parts 22 and 24 and the foreign matter prevention walls 24 and 44 and other elements. 4 is a view of the stator core 12 and the upper resolver cover 20 and the lower resolver cover 40 as viewed from the inner peripheral side of the resolver stator. FIG. 5 is a sectional view taken along the line AA in FIG. 4, and FIG. FIG. 7 is a part of a top view of the state where the upper resolver cover is removed.

  4 is a view as seen from the inner peripheral side of the resolver stator. FIG. 4 (a) shows a state immediately before the upper resolver cover 20 and the lower resolver cover 40 are assembled to the stator core 12, and FIG. FIG. 3 is a view showing a state where an upper resolver cover 20 and a lower resolver cover 40 are assembled to a stator core 12. FIG. 4B is a development of the state on the inner peripheral side of FIG.

  In FIG. 4, each salient pole 14 and an insulator 18 are shown on the stator core 12. When the insulator 18 is wound around each salient pole 14 with the winding 16 described in FIG. 3, the insulator 18 ensures insulation between the stator core 12, which is a magnetic material, and the conductor wire covered with the insulation coating. As the insulating member used, for example, an appropriate insulating paper is used. The insulator 18 is disposed between the stator core 12 and the winding 16. In FIG. 4, only a portion that can be seen when viewed from the inner peripheral side of the resolver stator is shown. The upper resolver cover 20 includes an inner edge portion 27, a foreign matter prevention wall 24, and an engagement pin 26. Similarly, the lower resolver cover 40 shows an inner edge 47, a foreign matter prevention wall 44, and an engagement hole 46.

  4A, the upper resolver cover 20 and the lower resolver cover 40 are moved from the upper side to the lower resolver cover 40 in the direction indicated by the arrows, respectively, so that the engaging pin 26 and the engaging hole 46 are moved. When assembled together, the state shown in FIG. That is, each foreign matter prevention wall 24 of the upper resolver cover 20 and each corresponding foreign matter prevention wall 44 of the lower resolver cover 40 face each other and are integrated. As a result, the gap between the adjacent salient poles 14 of the stator core 12 and the gap between the adjacent insulators 18 are blocked by the integrated foreign matter prevention walls 24 and 44.

  FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4, and shows a state in a radial plane passing through the engagement pin 26 and the engagement hole 46. Here, a state in which the partitioning portion 22 of the upper resolver cover 20 and the partitioning portion 42 of the lower resolver cover 40 corresponding to the partitioning portion 22 of the upper resolver cover 20 face each other and are integrated together with the foreign matter prevention walls 24 and 44 is shown.

  FIG. 6 is a cross-sectional view taken along line BB in FIG. 4 and shows a state in a radial plane passing through the center of the stator core 12 as the iron core of the winding 16. Here, the state of the main body portion 21, the inner edge portion 27, the outer edge portion 28 of the upper resolver cover 20, and the main body portion 41, the inner edge portion 47, and the outer edge portion 48 of the lower resolver cover 40 are shown. There are gaps between the stator core 12 and the outer edge portion 28 of the upper resolver cover 20 and the outer edge portion 48 of the lower resolver cover 40 in consideration of the dimensional accuracy and assembly accuracy of each element on the inner peripheral side of the stator core. This is because the upper resolver cover 20 and the lower resolver cover 40 are properly integrated. Of course, this gap may be filled with an appropriate flexible material, and when the upper resolver cover 20 and the lower resolver cover 40 are combined, a sealed structure may be used without affecting each winding 16.

  FIG. 7 is a partial view showing a state from the upper surface with the upper resolver cover removed. That is, it is a top view when only the lower resolver cover 40 is assembled to the stator core 12. As also shown in this figure, the partitioning portion 42 is arranged to extend in the radial direction in the gap 15 that is a space between the adjacent windings 16. And the foreign material prevention wall 44 connected to the partition part 42 and extended in the circumferential direction is arrange | positioned so that the clearance gap between the adjacent salient poles 14 may be filled up. As a result, foreign matters can be prevented from being caught in the gaps between the salient poles 14 of the stator core 12 without affecting the windings 16, and foreign matters can be prevented from entering the gaps 15 inside the stator core 12 from the gaps.

  In the above description, the upper resolver cover 20 and the lower resolver cover 40 have been described as having the same shape and dimensions except for the engaging portion. That is, although the upper resolver cover 20 and the lower resolver cover 40 have the same height, the sum of the upper resolver cover height and the lower resolver cover height may be the same, and the heights may be different. . For example, it is assumed that the lower resolver cover is provided with the engagement hole 46 in the shape of only the annular main body portion, the foreign matter prevention wall and the partitioning portion are provided only on the upper resolver cover, and the engagement pin 26 is provided thereon. Good.

It is a figure which shows a mode that a pair of upper and lower resolver cover of embodiment which concerns on this invention covers and incorporates a resolver stator. In embodiment which concerns on this invention, it is each top view of a pair of upper and lower resolver cover. It is a figure explaining the positional relationship when the upper resolver cover and lower resolver cover of embodiment which concern on this invention are mounted in a resolver stator. It is a figure which shows a mode that it saw from the inner peripheral side of the resolver stator with which the upper resolver cover and lower resolver cover which concerns on embodiment of this invention were assembled | attached. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. It is a part of top view of the state which assembled | attached the lower resolver cover of embodiment which concerns on this invention to the resolver stator, and removed the upper resolver cover.

Explanation of symbols

  10 resolver stator, 12 stator core, 14 salient pole, 15 gap, 16 winding, 18 insulator, 20 upper resolver cover, 21, 41 main body part, 22, 42 partition part, 24, 44 foreign matter prevention wall, 26 engaging pin, 27, 47 Inner edge, 28, 48 Outer edge, 40 Lower resolver cover, 46 Engagement hole.

Claims (4)

A pair of upper and lower resolver covers for covering a resolver stator constituting a resolver used in a rotating machine having a structure using a medium fluid for lubrication or cooling inside the rotating machine, wherein at least one of the resolver covers ,
Foreign matter prevention that prevents foreign matter contained in the medium fluid from entering the resolver when it is placed in the gap on the inner peripheral side of the resolver stator and combined with the corresponding part of the resolver cover on the other side. It has a wall,
When the pair of upper and lower resolver cover is integrated between the windings of the inner surface side and the resolver stator in each resolver cover, characterized in that it have a gap to the extent that the resolver cover and windings are not in contact A pair of upper and lower resolver covers used for a rotating machine. A pair of upper and lower resolver covers for covering from above and below a resolver stator that constitutes a resolver used in a rotating machine having a structure that uses a medium fluid for lubrication or cooling inside the rotating machine, each resolver cover,
In the gap between the teeth of the resolver stator, a partition portion inserted between the winding gaps between adjacent different phase windings;
A foreign matter preventing wall portion connected to the partition portion and disposed in a gap on the inner peripheral side of the resolver stator;
Have
The partition part of the upper resolver cover and the partition part of the lower resolver cover are arranged so as to be integrated correspondingly,
When the foreign matter preventing wall portion of the upper resolver cover and the foreign matter preventing wall portion of the lower resolver cover are integrated correspondingly, have a foreign matter prevention wall foreign matter contained in the medium to prevent fluid from entering the interior of the resolver And
When the pair of upper and lower resolver cover is integrated between the windings of the inner surface side and the resolver stator in each resolver cover is positioned to the resolver cover and windings have a gap so as not to contact A pair of upper and lower resolver covers used for a rotating machine. The pair of upper and lower resolver covers according to claim 2,
A pair of upper and lower resolver covers used in a rotating machine, wherein the upper resolver cover partition and the lower resolver cover partition have engagement means provided on surfaces facing each other. The pair of upper and lower resolver covers according to claim 2,
The foreign matter prevention wall
A pair of upper and lower resolver covers used in a rotating machine, wherein the insulators provided at the tips of the teeth of the resolver stator are respectively disposed in the gaps between adjacent insulators.

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