JPH04111265U - Axial current prevention device for rotating electrical machines - Google Patents
Axial current prevention device for rotating electrical machinesInfo
- Publication number
- JPH04111265U JPH04111265U JP1570991U JP1570991U JPH04111265U JP H04111265 U JPH04111265 U JP H04111265U JP 1570991 U JP1570991 U JP 1570991U JP 1570991 U JP1570991 U JP 1570991U JP H04111265 U JPH04111265 U JP H04111265U
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- shaft
- rotating shaft
- insulating layer
- rotating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002265 prevention Effects 0.000 title claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000003365 glass fiber Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 5
- 230000003449 preventive effect Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000020169 heat generation Effects 0.000 abstract description 4
- 229920001187 thermosetting polymer Polymers 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000009413 insulation Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 4
- 230000035882 stress Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Motor Or Generator Frames (AREA)
Abstract
(57)【要約】
【目的】 回転電機の軸電流防止装置として効果の高い
軸電流の回路を絶縁遮断する装置で、如何なる回転電機
にも実施でき、構造が簡単で、軸受け部の発熱に影響さ
れることのない回転電機の軸電流防止装置を提供する。
【構成】 金属製の回転軸１を支持する軸受け２と、こ
の軸受け２を支承するブラケット３とを設ける。このブ
ラケット３に軸受け２を挟持して固定するハウジング部
４，４を設ける。更に、回転軸１の軸受け対応部１ａの
周囲に、平行して引きそろえられた耐熱性のガラス繊維
に絶縁性の熱硬化性樹脂を含浸したテ―プ５を、回転軸
１の円周方向に巻き付けて絶縁層を形成する。このテー
プ状樹脂５は、ハウジング部４，４の回転軸１と対応す
る軸長方向寸法よりも長く巻き付ける。
(57) [Summary] [Purpose] This is a device that insulates and interrupts the shaft current circuit, which is highly effective as a shaft current prevention device for rotating electrical machines.It can be implemented on any rotating electrical machine, has a simple structure, and has no effect on heat generation in the bearing part. To provide an axial current prevention device for a rotating electrical machine that will not be damaged. [Structure] A bearing 2 that supports a rotating shaft 1 made of metal and a bracket 3 that supports this bearing 2 are provided. This bracket 3 is provided with housing parts 4, 4 for clamping and fixing the bearing 2. Furthermore, a tape 5 made of parallel heat-resistant glass fibers impregnated with an insulating thermosetting resin is placed around the bearing corresponding portion 1a of the rotating shaft 1 in the circumferential direction of the rotating shaft 1. to form an insulating layer. This tape-shaped resin 5 is wound around the housing portions 4, 4 for a length longer than the length of the shaft corresponding to the rotating shaft 1.
Description
【０００１】0001
本考案は、回転電機の軸電流防止装置に関し、特に、軸電流を遮断する方式の 軸電流防止装置に関する。 The present invention relates to a shaft current prevention device for rotating electrical machines, and in particular to a system that interrupts the shaft current. Related to shaft current prevention device.
【０００２】0002
一般に電動機においては、磁気の不平衡、静電気の蓄積、外部電流の回転軸へ の直接印加、整流器電源の使用による軸誘導等の原因により、回転軸の両端間、 回転軸と各軸受け間又は回転軸の各軸受け嵌合部に、大なり小なり軸電圧が発生 する。この軸電圧の発生が著しくなると、各軸受け部を通って軸電流が流れ、こ れによって潤滑油の黒化等を招き、場合によっては軸受けを損傷又は焼損するこ とがある。 In general, electric motors suffer from magnetic imbalance, static electricity accumulation, and external current flowing into the rotating shaft. Due to causes such as direct application of More or less shaft voltage occurs between the rotating shaft and each bearing or at each bearing fitting part of the rotating shaft. do. When the generation of this shaft voltage becomes significant, shaft current flows through each bearing part, and this This may lead to blackening of the lubricating oil, and in some cases may damage or burn out the bearing. There is.
【０００３】 従って、このような障害が生じないように、回転電機には軸電流防止装置が設 けられている。通常、この軸電流防止装置としては、回転軸を接地して軸電流を アースする装置と、軸電流の回路を絶縁遮断する装置とが用いられている。0003 Therefore, to prevent this kind of trouble from occurring, rotating electric machines must be equipped with shaft current prevention devices. I'm being kicked. Normally, this shaft current prevention device is designed to prevent shaft current by grounding the rotating shaft. A device for grounding and a device for insulating and interrupting the shaft current circuit are used.
【０００４】 しかし、回転軸を接地する装置は、一般に構造が複雑で、また、回転電機運転 中、常時過大電流をア―ス線に流しておくことは好ましくない。これに対して、 軸電流の回路を絶縁遮断する装置は、構造が簡単で、軸電流防止効果も高い。0004 However, devices that ground the rotating shaft generally have a complicated structure, and they also require It is not desirable to have excessive current flowing through the ground wire all the time. On the contrary, The device that insulates and interrupts the axial current circuit has a simple structure and is highly effective in preventing axial current.
【０００５】 このような軸電流の回路を絶縁遮断する装置の一つとして、実公昭５９−１７ ３４６７号の軸電流防止装置がある。この装置は、図２に示すように、回転軸１ １を軸受け１２を介して支承する金属製のブラケット１３と、軸受け１２をブラ ケット１３に取付けるためのハウジング部１４とが独立して設けられている。ブ ラケット１３とハウジング部１４との接合面には、絶縁層１５が設けられ、ブラ ケット１３とハウジング部１４とに挟持されている。この絶縁層１５によって、 電流が回転電機本体より回転軸１１に流れることが遮断される。[0005] As one of the devices for insulating and breaking such shaft current circuits, There is an axial current prevention device No. 3467. As shown in FIG. 2, this device has a rotating shaft 1 1 through a bearing 12, and a metal bracket 13 that supports the bearing 12 through a bearing 12. A housing portion 14 for attachment to the bracket 13 is provided independently. Bu An insulating layer 15 is provided on the joint surface between the racket 13 and the housing part 14, and It is held between the bracket 13 and the housing part 14. With this insulating layer 15, The flow of current from the rotating electric machine body to the rotating shaft 11 is blocked.
【０００６】 しかし、上記のような構成の従来の装置は、回転電機の構造によっては絶縁が 困難となり、採用できないという問題がある。特に、軸受け１２を絶縁する場合 、絶縁層１５の狭持されるブラケット１３とハウジング部１４とはそれぞれ独立 して設けられているため、回転電機の使用や周囲環境等より絶縁層１５に微振動 等による圧縮応力等が繰返し働くことになる。このため、絶縁層１５が疲労して 欠け等の損傷が発生する原因となっている。[0006] However, conventional devices with the above configuration may not be insulated depending on the structure of the rotating electrical machine. There is a problem that it becomes difficult and cannot be adopted. Especially when insulating the bearing 12 , the bracket 13 and the housing portion 14 on which the insulating layer 15 is sandwiched are each independent. Because the insulating layer 15 is provided with Compressive stress etc. due to such factors will work repeatedly. Therefore, the insulating layer 15 is fatigued. This causes damage such as chipping.
【０００７】 更に、軸受け１２の発熱により絶縁層１５が膨脹や乾固して、軸受け１２との 間に遊隙が生じて絶縁不良となり、ついには焼損等となる欠点がある。また、ブ ラケット１３とハウジング部１４とはそれぞれ別部材のため、組立てのための部 材点数及び製造工程が多くなり、製造コストが高くなる問題がある。[0007] Furthermore, the insulating layer 15 expands and dries up due to the heat generated by the bearing 12, causing the contact between the bearing 12 and the insulating layer 15 to expand and dry. There is a drawback that a gap is created between the two, resulting in poor insulation and eventually burnout. Also, Since the racket 13 and the housing part 14 are separate members, there is no need for assembly. There is a problem that the number of materials and manufacturing steps increase, resulting in an increase in manufacturing costs.
【０００８】 この問題を解決するために、従来では軸受けとハウジングとの間に設けられて いた絶縁層を、回転軸１１と軸受け１２との間に設けられたものが提案されてい る。[0008] To solve this problem, conventionally, a It has been proposed that an insulating layer is provided between the rotating shaft 11 and the bearing 12. Ru.
【０００９】 この回転軸１１と軸受け１２との間に設けられた絶縁層の装着方法としては、 ２種類の方法がある。[0009] The method for attaching the insulating layer between the rotating shaft 11 and the bearing 12 is as follows: There are two methods.
【００１０】 その１つは、絶縁層を塗布して硬化させる方法で、回転軸の軸受け嵌合部に絶 縁層を装着する為の凹部を設け、この凹部に、絶縁性の樹脂等を軸受けの内径に 適合する寸法にまで塗布し、樹脂が硬化した後に外径を加工する方法である。こ の場合、樹脂は引張力に対して弱いのでその補強を行なうために、ガラス等の張 力に強い短繊維をフェルト状態にして樹脂に混入することが行なわれている。0010 One method is to apply and harden an insulating layer on the rotating shaft's bearing fitting. A recess is provided for attaching the edge layer, and insulating resin is applied to the inner diameter of the bearing in this recess. In this method, the resin is applied to the appropriate dimensions and the outer diameter is processed after the resin has hardened. child In this case, since the resin is weak against tensile force, it is necessary to use tensile material such as glass to reinforce it. Short fibers that are strong against force are made into a felt state and mixed into resin.
【００１１】 他の方法は、固体の絶縁層を回転軸の絶縁層装着部の寸法と、軸受けの内径寸 法に合わせて予め加工したり、または絶縁層の型を設けて鋳造し、その後、回転 軸に焼き嵌めや冷却嵌めを行う方法によって装着が行なわれている。[0011] Another method is to apply a solid insulating layer to the dimensions of the insulating layer attachment part of the rotating shaft and the inner diameter of the bearing. It is pre-processed according to the method, or a mold of the insulating layer is prepared and cast, and then rotated. Attachment is performed by shrink fitting or cold fitting onto the shaft.
【００１２】0012
しかしながら、通常は、金属製のブラケットと軸とが充電部として作用するの で、両者間の絶縁を考えた場合には、絶縁層の表面は絶縁の縁面距離の対象とな り、軸長方向の寸法が大きい方がよい。しかし、従来の絶縁層の装着方法では、 いくつかの問題があるため、寸法を増大させることは困難である。 However, usually the metal bracket and shaft act as live parts. When considering the insulation between the two, the surface of the insulating layer is subject to the edge distance of the insulation. Therefore, the larger the dimension in the axial direction, the better. However, with the conventional method of attaching the insulation layer, It is difficult to increase the dimensions due to several problems.
【００１３】 即ち、絶縁層を塗布して硬化させる方法では、非量産の場合は良いが、量産と なると樹脂の収縮、回転軸軸長方向の寸法等の管理が困難となる。また、樹脂中 にガラス等の短繊維が混入される場合には、その取扱が面倒であり、前記絶縁層 等の形成には成形性が問題となり、とりわけ薄い被覆を成形し、外径寸法と被覆 の厚さを均等に仕上げることは困難であるため、絶縁層の寸法の増大は製作上困 難である。[0013] In other words, the method of applying and curing an insulating layer is good for non-mass production, but it is not suitable for mass production. In this case, it becomes difficult to control the shrinkage of the resin and the dimension in the longitudinal direction of the rotating shaft. Also, in resin When short fibers such as glass are mixed into the insulating layer, it is troublesome to handle them. Formability is an issue when forming thin coatings, especially when forming thin coatings and Since it is difficult to finish the insulation layer with a uniform thickness, increasing the dimensions of the insulation layer poses manufacturing difficulties. It is difficult.
【００１４】 また、固体の絶縁層を所用寸法に予め加工するものにあっては、絶縁層の溶融 温度が低いものは良いが、セラミック等の溶融温度が高いものは、容易に型によ る鋳造を行なうことができない。そのため、沿面距離となる絶縁層の軸長方向の 長さを長くとることは、加工工程を増加させ、製作時間の増加と加工の困難化を 招くものである。[0014] In addition, if the solid insulating layer is pre-processed to the required dimensions, the insulating layer may be melted. Products with a low temperature are good, but materials with a high melting temperature such as ceramics are easily molded. It is not possible to carry out casting. Therefore, the axial length of the insulating layer, which is the creepage distance, is Increasing the length increases the number of processing steps, increases production time, and makes processing difficult. It is an invitation.
【００１５】 本考案は、上述した課題を解決するために提案されたもので、その目的は、軸 電流防止装置として効果の高い軸電流の回路を絶縁遮断する装置であって、いか なる回転電機にも実施でき、構造が簡単で、軸受け部の発熱に影響されることの ない回転電機の軸電流防止装置を提供するものである。[0015] This invention was proposed to solve the above-mentioned problems, and its purpose is to This is a device that insulates and interrupts the shaft current circuit, which is highly effective as a current prevention device. It can be applied to rotating electric machines, has a simple structure, and is not affected by heat generation in the bearing part. The present invention provides an axial current prevention device for a rotating electric machine.
【００１６】[0016]
本考案の回転電機の軸電流防止装置では、以上の目的を達成するために、回転 軸と軸受けとブラケットを有する回転電機の回転軸の軸受け対応部に、繊維の方 向が回転軸の円周方向に向いたガラス繊維を基材とする絶縁性のテ―プ状樹脂を 巻き付けて、ブラケットの回転軸軸長方向の寸法よりも長く絶縁層を形成したこ とを特徴とする。 In order to achieve the above objectives, the shaft current prevention device for rotating electric machines of the present invention The fiber is attached to the bearing compatible part of the rotating shaft of a rotating electrical machine that has a shaft, bearing, and bracket. An insulating tape-shaped resin whose base material is glass fiber whose direction is in the circumferential direction of the rotating shaft. The insulating layer is wrapped around the bracket to form an insulating layer that is longer than the longitudinal dimension of the rotating shaft of the bracket. It is characterized by.
【００１７】[0017]
以上のような構成の本考案においては、回転電機の回転軸に設けられる絶縁層 が、取扱いが容易なガラス繊維を基材としたテ―プ状樹脂によって形成されるた め、巻き付けによる絶縁層の形成が可能になる。これによって、絶縁層を回転軸 軸長方向にブラケットのの寸法よりも長く、十分な長さに形成することができ、 回転軸に絶縁のための縁面の距離を大きくとることができる。 In the present invention configured as described above, an insulating layer provided on the rotating shaft of a rotating electrical machine is However, it is made of tape-shaped resin based on glass fiber, which is easy to handle. This makes it possible to form an insulating layer by winding. This allows the insulating layer to be It is longer than the dimension of the bracket in the axial direction, and can be formed to a sufficient length. It is possible to provide a large distance between the edges of the rotating shaft for insulation.
【００１８】[0018]
以下、本考案の回転電機の軸電流防止装置の一実施例を図面に基づいて説明す る。 Below, one embodiment of the shaft current prevention device for a rotating electric machine of the present invention will be explained based on the drawings. Ru.
【００１９】 即ち、回転電機の軸受け部には、金属製の回転軸１を支持するために軸受け２ と、この軸受け２を支承するブラケット３とが設けられている。このブラケット ３には、軸受け２を挟持して固定するハウジング部４，４が設けられている。更 に、回転軸１の軸受け２に支持される軸受け対応部１ａの周囲には、テープ状樹 脂５が巻き付けられている。このテープ状樹脂５は、平行して引きそろえられた 耐熱性のガラス繊維に絶縁性の熱硬化性樹脂を含浸させ半硬化させたもので、こ れにより、回転軸１の円周方向に絶縁層が形成されている。この場合テープ状樹 脂５は、ハウジング部４，４の回転軸１と対応する軸長方向寸法よりも長く巻き 付けられている。[0019] That is, in the bearing portion of the rotating electric machine, a bearing 2 is provided to support the metal rotating shaft 1. and a bracket 3 that supports this bearing 2. this bracket 3 is provided with housing parts 4, 4 that clamp and fix the bearing 2. Change In addition, a tape-shaped tree is placed around the bearing corresponding portion 1a supported by the bearing 2 of the rotating shaft 1. Grease 5 is wrapped around it. This tape-shaped resin 5 is arranged in parallel. This is made by semi-curing heat-resistant glass fiber impregnated with insulating thermosetting resin. As a result, an insulating layer is formed in the circumferential direction of the rotating shaft 1. In this case, the tape-shaped tree The grease 5 is wound longer than the axis length direction dimension corresponding to the rotating shaft 1 of the housing parts 4, 4. It is attached.
【００２０】 以上のような本実施例では、回転軸の軸受け対応部１ａ周囲に絶縁層が設けら れているため、金属製の回転軸１と軸受け２とは直接接触しない。また、絶縁層 としてガラス繊維に熱硬化性の樹脂を含浸させたテープ状樹脂５が用いられてい るので、絶縁層の厚みが均一となり、また、軸長方向の寸法を十分にとることが できる。更に、このテープ状樹脂５を巻き付ける際には、テープ５には引張力が 加えられるので、このテープ状樹脂５によって形成された絶縁層の内部には、ガ ラス繊維が平行して回転軸１の円周方向に走っている。従って、絶縁層の内部に は、圧縮残留応力が発生しており、回転軸１への密着効果が高い。[0020] In this embodiment as described above, an insulating layer is provided around the bearing corresponding portion 1a of the rotating shaft. Therefore, the metal rotating shaft 1 and the bearing 2 do not come into direct contact with each other. Also, insulating layer A tape-shaped resin 5 made of glass fiber impregnated with a thermosetting resin is used as a As a result, the thickness of the insulating layer is uniform, and the dimension in the axial direction is sufficient. can. Furthermore, when wrapping this tape-shaped resin 5, a tensile force is applied to the tape 5. gas is added to the inside of the insulating layer formed by this tape-shaped resin 5. The lath fibers run in parallel in the circumferential direction of the rotating shaft 1. Therefore, inside the insulating layer , compressive residual stress is generated, and the adhesion effect to the rotating shaft 1 is high.
【００２１】 以上のように本実施例の回転電機の軸電流防止装置は、金属製の回転軸１と軸 受け２とが直接接触しなので、なんらかの原因で回転軸に軸電圧が発生しても、 軸電流は軸受け２に流れることがない。従って、軸受けの損傷や焼損、回転軸の 損傷等、軸電流による障害をより効果的に防止することができる。[0021] As described above, the shaft current prevention device of the rotating electric machine of this embodiment is constructed by connecting the metal rotating shaft 1 and the shaft. Since it is in direct contact with receiver 2, even if shaft voltage occurs on the rotating shaft for some reason, No shaft current flows through the bearing 2. Therefore, bearings may be damaged or burnt out, and rotating shafts may Disturbances caused by shaft current, such as damage, can be more effectively prevented.
【００２２】 また、絶縁層に予備形成されたテープ状樹脂を用いているため、絶縁層を容易 に形成することができる。しかも、均一の厚みで、軸長方向の寸法を十分にとる ことができるので、絶縁に必要な縁面距離が確保され、安全性の高いものとする ことができる。更に、絶縁層を装着するための外径加工や型等が不要となり、製 造工程の単純化、製作費の低減等が可能となる。[0022] In addition, since the insulating layer uses pre-formed tape-shaped resin, it is easy to install the insulating layer. can be formed into Moreover, the thickness is uniform and the dimension in the axial direction is sufficient. This ensures the necessary edge distance for insulation and ensures high safety. be able to. Furthermore, there is no need for outer diameter machining or molds to attach the insulating layer, making manufacturing easier. This makes it possible to simplify the manufacturing process and reduce manufacturing costs.
【００２３】 更に、絶縁層に用いられるテープ状樹脂内のガラス繊維が平行して引きそろえ られて回転軸に対し円周方向に伸びているので、回転電機自体や外部よりの振動 に対しては、その振動を吸収することができ、絶縁層５の破損を防ぐことができ る。[0023] Furthermore, the glass fibers in the tape-shaped resin used for the insulation layer are aligned in parallel. Since it extends in the circumferential direction relative to the rotating shaft, vibrations from the rotating electric machine itself or from the outside can be avoided. , the vibration can be absorbed and damage to the insulating layer 5 can be prevented. Ru.
【００２４】 また、絶縁層の内部にはテープ状樹脂が巻き付けられることによる圧縮残留応 力が発生しているので、この絶縁層は経年変化や軸受けの発熱等により膨脹、乾 固した場合にあっても、絶縁層の樹脂の体積が減少することはない。このため、 膨脹収縮等の熱変形に伴う割れ等の発生を防止することができ、また軸受けと回 転軸の間に遊隙を生ずることがないので、異常発熱、焼損を解消することができ る。[0024] In addition, the inside of the insulating layer has compressive residual stress due to the tape-shaped resin being wrapped around it. Since force is generated, this insulating layer expands and dries out due to aging and heat generated by the bearing. Even when solidified, the volume of the resin in the insulating layer does not decrease. For this reason, It can prevent the occurrence of cracks caused by thermal deformation such as expansion and contraction, and also Since there is no play between the rotating shafts, abnormal heat generation and burnout can be eliminated. Ru.
【００２５】 更に、本実施例によれば、軸電流の防止を回転軸に絶縁層を形成するだけで良 く、従って、軸受けとこれを支承するブラケットとを一体型することができる。[0025] Furthermore, according to this embodiment, shaft current can be prevented simply by forming an insulating layer on the rotating shaft. Therefore, the bearing and the bracket supporting it can be integrated.
【００２６】 なお、本考案は上述した実施例に限定されるものではなく、具体的な各部材の 形状、或いは各々の取付け位置及び方法は適宜変更可能である。[0026] Note that the present invention is not limited to the above-mentioned embodiments, and the invention is not limited to the above-mentioned embodiments. The shape or each mounting position and method can be changed as appropriate.
【００２７】 例えば、図１に示されるのは、回転電機の軸受けの一つについてであるが、他 の軸受けも同様に構成される。[0027] For example, Fig. 1 shows one of the bearings of a rotating electric machine, but other bearings are shown in Fig. 1. The bearing is similarly constructed.
【００２８】 また、テープ状樹脂は、その厚さ及び幅を種々用意することによって、回転軸 の周囲の絶縁層に必要とされる軸長方向の寸法と厚みに対応して選択することが できる。即ち、各種回転電機の回転軸と軸受け部に対応にさせた絶縁部を形成す ることができる。[0028] In addition, by preparing tape-shaped resin in various thicknesses and widths, it is possible to It can be selected according to the axial dimension and thickness required for the surrounding insulating layer. can. In other words, insulating parts are formed to correspond to the rotating shafts and bearings of various rotating electric machines. can be done.
【００２９】[0029]
本考案の回転電機の軸電流防止装置は、回転電機の軸受け部に支持される回転 軸に、ガラス繊維のテープ状樹脂を基材とした絶縁層を回転軸軸長方向にブラケ ット対応部の寸法よりも長く形成するだけなので、絶縁性能に大きな影響を与え る縁面距離を容易に大きくとることが可能になる。 The shaft current prevention device for a rotating electrical machine of the present invention is a rotating electrical machine supported by a bearing part of a rotating electrical machine. An insulating layer made of glass fiber tape-shaped resin is attached to the shaft in the longitudinal direction of the rotating shaft. Since it is simply formed longer than the corresponding part, it has a large impact on insulation performance. This makes it possible to easily increase the distance between the edges.
【００３０】 そのうえ、絶縁層の形成は回転軸にのみ行なうので、構造が簡単となり、如何 なる回転電機の軸受け部にも実施することができ、製作費の大幅な削減と製作時 間の著しい短縮が可能となる。[0030] Furthermore, since the insulating layer is formed only on the rotating shaft, the structure is simple and It can also be applied to the bearings of rotating electric machines, greatly reducing manufacturing costs and reducing manufacturing time. This makes it possible to significantly shorten the time.
【００３１】 更に、発熱振動や経年変化に強い、耐久性の向上された回転電機の軸電流防止 装置を提供することができる。[0031] Furthermore, it is resistant to heat generation vibration and aging, and has improved durability to prevent shaft current in rotating electrical machines. equipment can be provided.
【図１】本考案の回転電機の軸電流防止装置の一実施例
を示す要部側面断面図。FIG. 1 is a side cross-sectional view of essential parts showing an embodiment of an axial current prevention device for a rotating electrical machine according to the present invention.
【図２】従来の回転電機の軸電流防止装置の一例を示す
要部側面断面図。FIG. 2 is a side sectional view of a main part showing an example of a conventional shaft current prevention device for a rotating electric machine.
１ 回転軸 ２ 軸受け ３ ブラケット ４ ハウジング部 ５ テープ状樹脂 １１ 回転軸 １２ 軸受け １３ ブラケット １４ ハウジング部 １５ 絶縁層 1 Rotating axis 2 Bearing 3 Bracket 4 Housing part 5 Tape-shaped resin 11 Rotating axis 12 Bearing 13 Bracket 14 Housing part 15 Insulating layer
Claims (1)
受けによって回転軸の軸受け対応部が支持され、ブラケ
ットによって軸受けが支承される回転電機の軸電流防止
装置において、前記軸受け対応部に、回転軸の円周方向
に伸びるガラス繊維を基材とする絶縁性のテ―プ状樹脂
を巻き付けて、ブラケットの回転軸軸長方向の寸法より
も長く絶縁層を形成したことを特徴とする軸電流防止措
置。1. A shaft current prevention device for a rotating electric machine, which has a rotating shaft, a bearing, and a bracket, a bearing corresponding part of the rotating shaft is supported by the bearing, and a bearing is supported by the bracket. A shaft current characterized in that an insulating tape-shaped resin whose base material is glass fiber that extends in the circumferential direction of the shaft is wrapped to form an insulating layer that is longer than the longitudinal dimension of the rotating shaft of the bracket. Preventive measures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1570991U JPH04111265U (en) | 1991-03-18 | 1991-03-18 | Axial current prevention device for rotating electrical machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1570991U JPH04111265U (en) | 1991-03-18 | 1991-03-18 | Axial current prevention device for rotating electrical machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04111265U true JPH04111265U (en) | 1992-09-28 |
Family
ID=31902850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1570991U Pending JPH04111265U (en) | 1991-03-18 | 1991-03-18 | Axial current prevention device for rotating electrical machines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04111265U (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4993463A (en) * | 1972-07-24 | 1974-09-05 | ||
| JPS5247202B2 (en) * | 1971-11-18 | 1977-12-01 | ||
| JPS59150898A (en) * | 1983-02-16 | 1984-08-29 | 三菱電機株式会社 | Electrode support conduit for electrical heating of underground hydrocarbon resources |
| JPS63105412A (en) * | 1986-10-20 | 1988-05-10 | 富士電機株式会社 | Hybrid mica prepreg tape for coil insulation |
-
1991
- 1991-03-18 JP JP1570991U patent/JPH04111265U/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5247202B2 (en) * | 1971-11-18 | 1977-12-01 | ||
| JPS4993463A (en) * | 1972-07-24 | 1974-09-05 | ||
| JPS59150898A (en) * | 1983-02-16 | 1984-08-29 | 三菱電機株式会社 | Electrode support conduit for electrical heating of underground hydrocarbon resources |
| JPS63105412A (en) * | 1986-10-20 | 1988-05-10 | 富士電機株式会社 | Hybrid mica prepreg tape for coil insulation |
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