JP2012122535A - Thrust bearing device of electric rotating machine - Google Patents

Thrust bearing device of electric rotating machine Download PDF

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JP2012122535A
JP2012122535A JP2010273124A JP2010273124A JP2012122535A JP 2012122535 A JP2012122535 A JP 2012122535A JP 2010273124 A JP2010273124 A JP 2010273124A JP 2010273124 A JP2010273124 A JP 2010273124A JP 2012122535 A JP2012122535 A JP 2012122535A
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bearing
thrust bearing
bearing device
bearing pad
electrical machine
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JP5518687B2 (en
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Tomoaki Yamashita
智彬 山下
Makoto Henmi
真 辺見
Yoshimori Hagitani
好守 萩谷
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Hitachi Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/30—Application independent of particular apparatuses related to direction with respect to gravity
    • F16C2300/34—Vertical, e.g. bearings for supporting a vertical shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Abstract

PROBLEM TO BE SOLVED: To provide a thrust bearing device of an electric rotating machine, in which a thrust bearing is efficiently cooled to increase cooling performance of the bearing and a bearing pad is not thermally deformed.SOLUTION: For solving the problem, the thrust bearing device of the electric rotating machine includes a rotating shaft, a runner attached to the rotating shaft, a plurality of bearing pads in slide-contact with the runner, at least one cooling groove provided in each of the bearing pads, a filler opening for supplying cooling oil to the bearing pad, and a bearing oil chamber housing the runner, the bearing pad, and the filler opening and filled with lubricating oil, wherein the cooling groove is provided so as to connect a side surface on the upstream side of the bearing pad and other side surface on the downstream side thereof, and has an angle on the radial outside with respect to the circumferential direction of the bearing pad, and the filler opening is provided between the adjacent bearing pads and on the inner radial side with respect to the radial center thereof.

Description

本発明は回転電機のスラスト軸受装置に係り、特に、立軸型の水車発電機等のように、回転体の周囲に放射状に配置された扇形状の軸受パッドを備えているものに好適な回転電機のスラスト軸受装置の構造に関する。   TECHNICAL FIELD The present invention relates to a thrust bearing device for a rotating electrical machine, and more particularly, to a rotating electrical machine suitable for a device having fan-shaped bearing pads arranged radially around a rotating body, such as a vertical shaft type water turbine generator. The present invention relates to the structure of a thrust bearing device.

一般に、立軸型の水車発電機におけるスラスト軸受装置は、水車及び発電機等の回転体の自重に加え、水車にかかる水スラスト荷重を支持する必要がある。大容量機の場合、その荷重は、数千ｔにも達する。   In general, a thrust bearing device in a vertical shaft type water turbine generator needs to support a water thrust load applied to the water turbine in addition to the weight of a rotating body such as the water turbine and the generator. In the case of a large capacity machine, the load reaches several thousand tons.

このような高負荷状態では、ランナの回転により、ランナと軸受パッドの間に形成されるスラスト荷重を支持する油膜が温度上昇し、この温度上昇に伴って、軸受摺動面の温度が上昇してしまい、その摺動面の熱が軸受パッド全体に伝わり、軸受摺動面が熱変形し、油膜の特性に悪影響を与える可能性がある。   In such a high load state, the runner rotation increases the temperature of the oil film that supports the thrust load formed between the runner and the bearing pad, and the temperature of the bearing sliding surface increases with this temperature increase. As a result, the heat of the sliding surface is transmitted to the entire bearing pad, and the bearing sliding surface is thermally deformed, which may adversely affect the characteristics of the oil film.

このため、大容量機のスラスト軸受は、その冷却性能を上げて、油膜特性に悪影響を与えないようにする必要がある。   For this reason, it is necessary to increase the cooling performance of the thrust bearing of the large capacity machine so as not to adversely affect the oil film characteristics.

このスラスト軸受の冷却性能を向上する構造として、特許文献1に記載されたものが知られている。この特許文献１では、軸受パッドが、上部台金と下部台金からなる二層式構造となっており、上部台金と下部台金との接合面の下部台金側には、冷却用の通油溝が形成されている。   A structure described in Patent Document 1 is known as a structure for improving the cooling performance of this thrust bearing. In Patent Document 1, the bearing pad has a two-layer structure including an upper base metal and a lower base metal, and a cooling base is provided on the lower base side of the joint surface between the upper base metal and the lower base metal. An oil passage groove is formed.

そして、その冷却用の通油溝は、溝内部で冷却油の流速が下がらないように、ランナの回転方向に対して一定の角度をつけて形成され、ランナの回転に伴う冷却油の流れ方向と冷却用の通油溝の方向を一致させて、摺動面を効率よく冷却しようとするものである。   The cooling oil passage groove is formed at a fixed angle with respect to the rotation direction of the runner so that the flow speed of the cooling oil does not decrease inside the groove, and the flow direction of the cooling oil accompanying the rotation of the runner And the direction of the oil passage groove for cooling are matched to efficiently cool the sliding surface.

特開昭５５−３３９０５号公報JP 55-33905 A

しかしながら、特許文献１に記載されているように、冷却用の通油溝を、ランナの回転方向に対して一定の角度をつけて形成し、ランナの回転に伴う冷却油の流れ方向と冷却用の通油溝の方向を一致させて、摺動面を効率よく冷却しようとしても、運転条件によっては、軸受パッドに部分的に油膜圧力が高く、かつ、温度が高い高温域が発生して、溝内部を流れる冷却油も温度が高くなる恐れがある。   However, as described in Patent Document 1, an oil passage groove for cooling is formed at a certain angle with respect to the rotation direction of the runner, so that the flow direction of cooling oil and the cooling flow accompanying the rotation of the runner are formed. Even if trying to cool the sliding surface efficiently by matching the direction of the oil passage groove, depending on the operating conditions, a high temperature region where the oil film pressure is partially high and the temperature is high is generated on the bearing pad, The temperature of the cooling oil flowing inside the groove may also increase.

従って、特許文献１では、スラスト軸受を効率よく冷却することができず、軸受の冷却性能が向上しないため、軸受パッドが熱変形してしまう恐れがあった。   Therefore, in Patent Document 1, the thrust bearing cannot be efficiently cooled, and the cooling performance of the bearing is not improved, so that the bearing pad may be thermally deformed.

本発明は上述の点に鑑みなされたもので、その目的とするところは、スラスト軸受が効率よく冷却されて軸受の冷却性能が向上し、軸受パッドが熱変形しない回転電機のスラスト軸受装置を提供することにある。   The present invention has been made in view of the above-mentioned points, and an object thereof is to provide a thrust bearing device for a rotating electrical machine in which a thrust bearing is efficiently cooled to improve the cooling performance of the bearing and the bearing pad is not thermally deformed. There is to do.

本発明の回転電機のスラスト軸受装置は、上記目的を達成するために、回転軸と、該回転軸に取付けられたランナと、該ランナと摺動接触する複数個の軸受パッドと、該各々の軸受パッドに設けられた少なくとも１つの冷却溝と、冷却油を前記軸受パッドに供給する給油口と、前記ランナ、軸受パッド及び給油口を収容し、潤滑油が満たされている軸受油槽とを備えた回転電機のスラスト軸受装置において、前記冷却溝は、前記軸受パッドの上流側の側面と下流側の他の側面とを連通するように設けられ、かつ、前記軸受パッド円周方向に対して径方向外側に角度を有していると共に、前記給油口は、隣接する前記軸受パッド間で、かつ、径方向中心に対して内径側に設けられていることを特徴とする。   In order to achieve the above object, a thrust bearing device for a rotating electrical machine according to the present invention includes a rotating shaft, a runner attached to the rotating shaft, a plurality of bearing pads in sliding contact with the runner, And at least one cooling groove provided in the bearing pad, an oil supply port that supplies cooling oil to the bearing pad, and a bearing oil tank that contains the runner, the bearing pad, and the oil supply port and is filled with lubricating oil. In the thrust bearing device of the rotating electrical machine, the cooling groove is provided so as to communicate the upstream side surface of the bearing pad and the other downstream side surface, and has a diameter with respect to the circumferential direction of the bearing pad. An angle is formed on the outer side in the direction, and the oil filler port is provided between the adjacent bearing pads and on the inner diameter side with respect to the radial center.

本発明によれば、スラスト軸受が効率よく冷却されるので軸受の冷却性能が向上し、軸受パッドの熱変形を防止することができる回転電機のスラスト軸受装置を得ることができる。   According to the present invention, since the thrust bearing is efficiently cooled, the cooling performance of the bearing is improved, and a thrust bearing device for a rotating electrical machine that can prevent thermal deformation of the bearing pad can be obtained.

本発明の回転電機のスラスト軸受装置の実施例１を示す概略構成図である。It is a schematic block diagram which shows Example 1 of the thrust bearing apparatus of the rotary electric machine of this invention. 実施例１に係る回転電機のスラスト軸受装置を、軸受パッドの上方から、見た部分平面である。It is the partial plane which looked at the thrust bearing device of the rotation electrical machinery concerning Example 1 from the upper part of a bearing pad. 実施例１に係る回転電機のスラスト軸受装置における軸受パッドを示す斜視図である。It is a perspective view which shows the bearing pad in the thrust bearing apparatus of the rotary electric machine which concerns on Example 1. FIG. 実施例１に係る回転電機のスラスト軸受装置の軸受パッドに設けられた冷却溝と、それに流入する油の流速ベクトルを示した図である。It is the figure which showed the cooling groove provided in the bearing pad of the thrust bearing apparatus of the rotary electric machine which concerns on Example 1, and the flow velocity vector of the oil which flows into it. 実施例１に係る回転電機のスラスト軸受装置の軸受パッドを側面から見た図である。It is the figure which looked at the bearing pad of the thrust bearing apparatus of the rotary electric machine which concerns on Example 1 from the side surface. 実施例１に係る回転電機のスラスト軸受装置における軸受パッドに設けられた冷却溝と、それに流入する油の流速ベクトルを示した図である。It is the figure which showed the cooling groove provided in the bearing pad in the thrust bearing apparatus of the rotary electric machine which concerns on Example 1, and the flow velocity vector of the oil which flows into it. 本発明の回転電機のスラスト軸受装置の実施例２を示す軸受パッドを上方から見た図である。It is the figure which looked at the bearing pad which shows Example 2 of the thrust bearing apparatus of the rotary electric machine of this invention from the upper direction. 本発明の回転電機のスラスト軸受装置の実施例３を示す軸受パッドを上方から見た図である。It is the figure which looked at the bearing pad which shows Example 3 of the thrust bearing apparatus of the rotary electric machine of this invention from the upper direction. 実施例３の変形例を示した軸受パッド上方から見た図である。FIG. 10 is a view seen from above the bearing pad, showing a modification of the third embodiment.

以下、図示した実施例に基づいて本発明の回転電機のスラスト軸受装置について説明する。   Hereinafter, a thrust bearing device for a rotating electrical machine according to the present invention will be described based on the illustrated embodiments.

図１は、本発明の回転電機のスラスト軸受装置の実施例１である発電機用スラスト軸受装置を示す概略構成図である。   FIG. 1 is a schematic configuration diagram illustrating a thrust bearing device for a generator that is a first embodiment of a thrust bearing device for a rotating electrical machine according to the present invention.

図１に示すように、発電機用スラスト軸受装置は、回転軸２と、この回転軸２に取付けられたランナ３と、ランナ３を摺動支持する軸受パッド４と、軸受パッド４に設けられた複数の冷却溝６と、これらの複数の冷却溝６に冷却油を供給する給油口５とから概略構成されている。また、ランナ３と軸受パッド４、給油口５は、潤滑油が満たされている軸受油槽７内に収容されている。   As shown in FIG. 1, the generator thrust bearing device is provided on a rotating shaft 2, a runner 3 attached to the rotating shaft 2, a bearing pad 4 for slidingly supporting the runner 3, and the bearing pad 4. The plurality of cooling grooves 6 and an oil supply port 5 for supplying cooling oil to the plurality of cooling grooves 6 are schematically configured. The runner 3, the bearing pad 4, and the oil supply port 5 are accommodated in a bearing oil tank 7 filled with lubricating oil.

図２に示すように、軸受パッド４は、回転軸２の周りに径方向に放射状に複数個配置され、回転軸２及び回転軸２に取付けられたランナ３などで構成された回転体等の自重と、水車に加わる水スラスト荷重とを合わせた総荷重を支持している。ここで、上述の“回転軸２の周りに径方向に放射状に複数個配置され”とは、回転軸２の中心から径方向にほぼ同じ距離伸び、回転軸２の周方向に所定間隔もって複数個並べて配置されている状態をいう。   As shown in FIG. 2, a plurality of bearing pads 4 are arranged radially around the rotation shaft 2 in a radial direction, and are composed of the rotation shaft 2 and a runner 3 attached to the rotation shaft 2. It supports the total load that combines the dead weight and the water thrust load applied to the turbine. Here, the above-mentioned “arranged in a plurality of radial directions around the rotating shaft 2” means that the plurality of shafts extend from the center of the rotating shaft 2 by substantially the same distance in the radial direction, and have a predetermined interval in the circumferential direction of the rotating shaft 2. The state where it is arranged side by side.

このように構成されるスラスト軸受装置は、回転軸２及びランナ３が回転（回転方向１）すると、ランナ３と軸受パッド４との間に油膜が形成されるようになっており、この油膜の圧力により、上記の総荷重を支持するものである。   In the thrust bearing device configured as described above, when the rotary shaft 2 and the runner 3 rotate (rotation direction 1), an oil film is formed between the runner 3 and the bearing pad 4. The total load is supported by the pressure.

尚、本実施例では、図３に示すように、軸受パッド４は、上部台金４aと下部台金４ｂからなる二層式構造であるが、一体型でも構わない。しかし、二層式構造の方が、上部台金４aと下部台金４ｂの間の接触熱抵抗が大きくなるため、軸受パッド４の熱変形を小さくすることが可能なため、以後は二層式構造の軸受パッド４について記載する。   In this embodiment, as shown in FIG. 3, the bearing pad 4 has a two-layer structure composed of an upper base metal 4a and a lower base metal 4b, but it may be an integral type. However, in the case of the two-layer structure, the contact thermal resistance between the upper base metal 4a and the lower base metal 4b is increased, so that the thermal deformation of the bearing pad 4 can be reduced. The structure bearing pad 4 will be described.

本実施例では、図２及び図３において、軸受パッド４の上流側１５と下流側１６を連通するように、上部台金４a側に冷却溝６を設けている。この冷却溝６の形状は、軸受パッド４の円周方向に対して径方向外側に角度を有しており、そして、図２及び図５に示すように、冷却油を供給する給油口5は、隣接する軸受パッド４の間に設けられ、かつ、径方向中心に対して内径側に設けられている。   In this embodiment, in FIG. 2 and FIG. 3, the cooling groove 6 is provided on the upper base metal 4 a side so that the upstream side 15 and the downstream side 16 of the bearing pad 4 communicate with each other. The shape of the cooling groove 6 has an angle radially outward with respect to the circumferential direction of the bearing pad 4, and as shown in FIGS. , Between the adjacent bearing pads 4 and on the inner diameter side with respect to the radial center.

尚、本実施例では、上部台金４a側に冷却溝６を設けているが、上部台金４a側でなく、下部台金側４b側に設けてもよい。   In this embodiment, the cooling groove 6 is provided on the upper base metal 4a side, but may be provided on the lower base metal side 4b side instead of the upper base metal 4a side.

図４は、本実施例の軸受パッド４に設けられた冷却溝６と、それに流入する油の流速ベクトル9を示したものである。   FIG. 4 shows the cooling groove 6 provided in the bearing pad 4 of the present embodiment and the flow velocity vector 9 of the oil flowing into it.

該図に示すように、軸受油槽内の油には、軸受パッド４と摺動するランナ３の回転によるせん断力１０と、遠心力１１の合力１２が作用する。本図のような冷却溝形状であると、油の流れ方向と溝の方向が一致するため、溝内の油の流速が上がり、軸受パッド４の冷却を効率よく行なうことが可能である。   As shown in the figure, the shear force 10 due to the rotation of the runner 3 sliding with the bearing pad 4 and the resultant force 12 of the centrifugal force 11 act on the oil in the bearing oil tank. In the cooling groove shape as shown in the figure, the oil flow direction and the groove direction coincide with each other, so that the oil flow rate in the groove increases and the bearing pad 4 can be cooled efficiently.

次に、上述した本実施例の冷却油を供給する給油口５が、隣接する軸受パッド４の間で、かつ、軸受パッド４の径方向中心線１４に対して内径側に設けられている点の作用、効果について説明する。   Next, the above-described oil supply port 5 for supplying the cooling oil of this embodiment is provided between the adjacent bearing pads 4 and on the inner diameter side with respect to the radial center line 14 of the bearing pad 4. The operation and effect of will be described.

図６に示す太い点線で囲まれた領域は、一般的に最も油膜圧力が高く、かつ温度が高い高温域１３である。   A region surrounded by a thick dotted line shown in FIG. 6 is a high-temperature region 13 that generally has the highest oil film pressure and the highest temperature.

温度が高い高温域１３の位置は、軸受パッド４の下流側で、かつ、外径側のため、図６に示すように、給油口５を径方向中心線１４より内径側に設けると、給油口５から供給される低温の冷却油が、高温域１３に効率よく流入することができる。   Since the position of the high temperature region 13 where the temperature is high is on the downstream side of the bearing pad 4 and on the outer diameter side, the oil supply port 5 is provided on the inner diameter side with respect to the radial center line 14 as shown in FIG. The low-temperature cooling oil supplied from the port 5 can efficiently flow into the high-temperature region 13.

そのため、給油口５から低温の冷却油が高温域１３に効率よく流入することができるので、軸受パッド４の摺動面を、効率よく冷却することが可能である。   Therefore, since the low-temperature cooling oil can efficiently flow into the high-temperature region 13 from the oil supply port 5, the sliding surface of the bearing pad 4 can be efficiently cooled.

上述した実施例１の場合、時間の経過に伴い、冷却溝近傍に境界層が発達する可能性がある。粘性のある流体が壁面に沿って流れる時、壁面近傍には流れが滞留する境界層と呼ばれる領域が生じる。時間の経過に伴い、これが成長し壁面への熱の伝達を阻害するため、冷却効果が低下することが懸念される。   In the case of Example 1 described above, a boundary layer may develop in the vicinity of the cooling groove with the passage of time. When a viscous fluid flows along the wall surface, an area called a boundary layer in which the flow stays is formed in the vicinity of the wall surface. With the passage of time, this grows and hinders the transfer of heat to the wall surface, so there is a concern that the cooling effect will be reduced.

そこで、図７に示す実施例２では、冷却溝６を、軸受パッド４の周方向中心線８より下流側で、内径方向に角度を変化させている。他の構成は、実施例１と同様である。   Therefore, in the second embodiment shown in FIG. 7, the angle of the cooling groove 6 is changed in the inner diameter direction on the downstream side of the circumferential center line 8 of the bearing pad 4. Other configurations are the same as those of the first embodiment.

このような本実施例の構成では、冷却溝６の出口側（特に、高温領域）の流れが、軸受パッド４の周方向中心線８より下流側で角度が変化していることから、乱されるため、境界層の発達を抑制することが可能である。   In such a configuration of the present embodiment, the flow on the outlet side (especially the high temperature region) of the cooling groove 6 is disturbed because the angle changes on the downstream side of the circumferential center line 8 of the bearing pad 4. Therefore, it is possible to suppress the development of the boundary layer.

これより、軸受パッド４の摺動面の冷却効果を高めることが可能である。また、冷却溝形状は、曲線形状でもよい。   As a result, the cooling effect of the sliding surface of the bearing pad 4 can be enhanced. The cooling groove shape may be a curved shape.

上述した実施例１及び２では、揚水式水車発電機のような可逆回転機（回転方向１又は１´）には対応できない。   In Examples 1 and 2 described above, it is not possible to cope with a reversible rotating machine (rotating direction 1 or 1 ′) such as a pumped water turbine generator.

そこで、図８に示す実施例３では、冷却溝６を、軸受パッド４の円周方向中心に対して対称に設けている。   Therefore, in the third embodiment shown in FIG. 8, the cooling groove 6 is provided symmetrically with respect to the circumferential center of the bearing pad 4.

これより、揚水式水車発電機のような可逆回転機においても効率よく冷却することが可能である。   Thus, it is possible to efficiently cool the reversible rotating machine such as the pumped water turbine generator.

また、図９に示すように、図８に示した冷却溝６を、軸受パッド４の周方向中心線８より出口側で、径方向内側に角度を変化してもよい。また、冷却溝６の形状は、曲線形状にしてもよい。   Further, as shown in FIG. 9, the angle of the cooling groove 6 shown in FIG. 8 may be changed radially inward on the outlet side from the circumferential center line 8 of the bearing pad 4. The shape of the cooling groove 6 may be a curved shape.

このように構成しても、図８に示した実施例と同様な効果を得ることができる。   Even if comprised in this way, the effect similar to the Example shown in FIG. 8 can be acquired.

２…回転軸、３…ランナ、４…軸受パッド、４a…上部台金、４b…下部台金、５…給油口、６…冷却溝、7…軸受油槽、８…周方向中心線、９…油の流速ベクトル、１３…高温域、１４…径方向中心線、１５…上流側、１６…下流側。   2 ... Rotary shaft, 3 ... runner, 4 ... bearing pad, 4a ... upper base metal, 4b ... lower base metal, 5 ... oil supply port, 6 ... cooling groove, 7 ... bearing oil tank, 8 ... circumferential center line, 9 ... Oil flow velocity vector, 13 ... high temperature region, 14 ... radial center line, 15 ... upstream side, 16 ... downstream side.

Claims (5)

回転軸と、該回転軸に取付けられたランナと、該ランナと摺動接触する複数個の軸受パッドと、該各々の軸受パッドに設けられた少なくとも１つの冷却溝と、冷却油を前記軸受パッドに供給する給油口と、前記ランナ、軸受パッド及び給油口を収容し、潤滑油が満たされている軸受油槽とを備えた回転電機のスラスト軸受装置において、
前記冷却溝は、前記軸受パッドの上流側の側面と下流側の他の側面とを連通するように設けられ、かつ、前記軸受パッド円周方向に対して径方向外側に角度を有していると共に、前記給油口は、隣接する前記軸受パッド間で、かつ、径方向中心に対して内径側に設けられていることを特徴とするスラスト軸受装置。 A rotating shaft; a runner attached to the rotating shaft; a plurality of bearing pads in sliding contact with the runner; at least one cooling groove provided in each bearing pad; In a thrust bearing device for a rotating electrical machine, comprising: an oil supply port to be supplied; and a bearing oil tank that contains the runner, the bearing pad, and the oil supply port, and is filled with lubricating oil.
The cooling groove is provided so as to communicate the upstream side surface of the bearing pad with the other downstream side surface, and has an angle radially outward with respect to the circumferential direction of the bearing pad. The thrust bearing device is characterized in that the oil filler opening is provided between the adjacent bearing pads and on the inner diameter side with respect to the radial center. 請求項１に記載の回転電機のスラスト軸受装置において、
前記軸受パッドは、上部台金及び下部台金を結合することより構成される二層式構造であり、かつ、前記冷却溝は、前記上部台金と下部台金の結合面に沿って、前記上部台金側又は前記下部台金側のいずれかに設けていることを特徴とする回転電機のスラスト軸受装置。 The thrust bearing device for a rotating electrical machine according to claim 1,
The bearing pad has a two-layer structure constituted by joining an upper base metal and a lower base metal, and the cooling groove is formed along the joining surface of the upper base metal and the lower base metal, A thrust bearing device for a rotating electrical machine, wherein the thrust bearing device is provided on either the upper base metal side or the lower base metal side. 請求項１又は２に記載の回転電機のスラスト軸受装置において、
前記冷却溝は、前記軸受パッドの周方向中心より下流側で、径方向内側に角度が変化していることを特徴とする回転電機のスラスト軸受装置。 The thrust bearing device for a rotating electrical machine according to claim 1 or 2,
A thrust bearing device for a rotating electrical machine, wherein the cooling groove has an angle that changes downstream in the radial direction and downstream from the circumferential center of the bearing pad. 請求項１乃至３のいずれかに記載の回転電機のスラスト軸受装置において、
前記冷却溝が、前記軸受パッドの円周方向中心に対して対称であることを特徴とする回転電機のスラスト軸受装置。 The thrust bearing device for a rotating electrical machine according to any one of claims 1 to 3,
A thrust bearing device for a rotating electrical machine, wherein the cooling groove is symmetric with respect to a circumferential center of the bearing pad. 請求項４に記載の回転電機のスラスト軸受装置において、
前記冷却溝は、前記軸受パッドの周方向中心線より出口側で、径方向内側に角度が変化していることを特徴とする回転電機のスラスト軸受装置。 The thrust bearing device for a rotating electrical machine according to claim 4,
The thrust bearing device for a rotating electrical machine, wherein the cooling groove has an angle changing radially inward from an outlet side of a circumferential center line of the bearing pad.
JP2010273124A 2010-12-08 2010-12-08 Thrust bearing device for rotating electrical machine Expired - Fee Related JP5518687B2 (en)

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CN105257702A (en) * 2015-11-10 2016-01-20 浙江大学 Bearing bush with Benard type heat radiation grooves
CN113891996A (en) * 2019-06-04 2022-01-04 诺沃皮尼奥内技术股份有限公司 Bearing with cooling microchannels in liner, and method
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JP2015200388A (en) * 2014-04-09 2015-11-12 三菱日立パワーシステムズ株式会社 Bearing pad, bearing device including bearing pad, and rotary machine including bearing device
CN105257702A (en) * 2015-11-10 2016-01-20 浙江大学 Bearing bush with Benard type heat radiation grooves
CN113891996A (en) * 2019-06-04 2022-01-04 诺沃皮尼奥内技术股份有限公司 Bearing with cooling microchannels in liner, and method
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CN114026343A (en) * 2019-07-08 2022-02-08 米巴工业轴承德国有限公司 Hydraulic sliding bearing

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