JPH0623766Y2 - bearing - Google Patents
bearingInfo
- Publication number
- JPH0623766Y2 JPH0623766Y2 JP1987106283U JP10628387U JPH0623766Y2 JP H0623766 Y2 JPH0623766 Y2 JP H0623766Y2 JP 1987106283 U JP1987106283 U JP 1987106283U JP 10628387 U JP10628387 U JP 10628387U JP H0623766 Y2 JPH0623766 Y2 JP H0623766Y2
- Authority
- JP
- Japan
- Prior art keywords
- pad
- rotating shaft
- rotary shaft
- bearing
- pressure
- 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.)
- Expired - Lifetime
Links
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 19
- 238000013016 damping Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
Description
【考案の詳細な説明】 〈産業上の利用分野〉 本考案は、回転軸に対する制振効果を高めたパッド形軸
受に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a pad type bearing having an enhanced vibration damping effect on a rotating shaft.
〈従来の技術〉 従来のティルティングパッド軸受を第２図，第３図に示
す。この軸受１００は、油孔１０１を有する外枠１０２
の内部にパッド１０４を４ヶ所に配置し、これらパッド
１０４で回転軸１０６を外周より支持するようになって
いる。パッド１０４は略中央に一面が球面状に形成され
たピボット１０８が設けてあり、ピボット１０８の球面
状突起で外枠１０２側の当て金１１０に接している。そ
して油孔１０１より潤滑油を圧送し外枠１０２内を潤滑
油で満たした状態で回転軸１０６を回転させると、パッ
ド１０４が適宜に傾斜して回転軸１０６との油に油膜を
形成し回転軸１０６を支持する。<Prior Art> Conventional tilting pad bearings are shown in Figs. The bearing 100 includes an outer frame 102 having an oil hole 101.
The pads 104 are arranged at four positions inside the, and the pads 104 support the rotating shaft 106 from the outer periphery. The pad 104 is provided with a pivot 108 whose one surface is formed in a spherical shape substantially at the center, and the spherical projection of the pivot 108 contacts the pad 110 on the outer frame 102 side. When the rotating shaft 106 is rotated while the lubricating oil is pumped through the oil hole 101 and the outer frame 102 is filled with the lubricating oil, the pad 104 is appropriately tilted to form an oil film on the oil with the rotating shaft 106 and rotate. Supports the shaft 106.
〈考案が解決しようとする課題〉 このような軸受１００は、回転軸１０６を支持する油膜
が安定し回転軸１０６を確実に支持するという反面、そ
の支持の剛性が高く回転軸１０６に振動が生じた場合な
どには、この軸受１００が支点のように働き、回転軸１
０６の振動が大きく増幅されるという問題があった。<Problems to be Solved by the Invention> In such a bearing 100, while the oil film supporting the rotating shaft 106 is stable and the rotating shaft 106 is reliably supported, the supporting rigidity is high and the rotating shaft 106 vibrates. In the case of contact, the bearing 100 works like a fulcrum,
There was a problem that the vibration of 06 was greatly amplified.
〈課題を解決するための手段〉 本考案はこのような問題を解決するものであって、回転
軸の周囲に中央部がピボット支持された複数のパッドを
配置し、これらパッドと前記回転軸の外周面との間に形
成される油膜を介して当該回転軸を支持する軸受におい
て、前記油膜の圧力を測定する圧力測定器と、前記パッ
ドのうち前記回転軸の下側に位置するパッドを前記回転
軸の外周面に対して傾動させる移動装置と、前記圧力測
定器からの検出信号に基づいて前記移動装置の作動を制
御する制御装置とを具えたことを特徴とするものであ
る。<Means for Solving the Problem> The present invention is to solve such a problem, in which a plurality of pads whose central portion is pivotally supported are arranged around the rotary shaft, and these pads and the rotary shaft are connected to each other. In a bearing that supports the rotating shaft through an oil film formed between the outer peripheral surface, a pressure measuring device that measures the pressure of the oil film, and a pad located below the rotating shaft of the pad, It is characterized by comprising a moving device tilting with respect to the outer peripheral surface of the rotating shaft, and a control device for controlling the operation of the moving device based on a detection signal from the pressure measuring device.
〈作用〉 回転軸に振動が発生すると、油膜の圧力変動が周期的に
発生し、これが圧力測定器によって検出される。制御装
置は、この圧力測定器からの検出信号に基づいて移動装
置を作動してパッドを傾動させることにより、回転軸の
外周面とパッドとの間隔を変え、油膜の圧力が変化して
回転軸の振動が抑制される。<Operation> When vibration occurs on the rotating shaft, the pressure fluctuation of the oil film periodically occurs, and this is detected by the pressure measuring device. The control device operates the moving device based on the detection signal from the pressure measuring device to tilt the pad, thereby changing the distance between the outer peripheral surface of the rotating shaft and the pad and changing the pressure of the oil film to change the rotating shaft. Vibration is suppressed.
〈実施例〉 本考案の軸受の一実施例を図を用いて説明する。第１図
に示すように、軸受２は外枠４の内周にパッド６を有
し、このパッド６に囲まれるように回転軸８が通してあ
る。外枠４には導油孔１０が設けてあり、この導油孔１
０は図示しない油圧ポンプに連通している。パッド６は
回転軸８に沿う曲面形状で、外枠４側の略中央にピボッ
ト１２が固定してあり、このピボット１２は外枠４に設
けた凹部１４に挿入されている。ピボット１２の外枠４
側は球面状になっており、前記凹部１４の奥に設けられ
た当て板１６に当接している。<Example> An example of the bearing of the present invention will be described with reference to the drawings. As shown in FIG. 1, the bearing 2 has a pad 6 on the inner circumference of an outer frame 4, and a rotary shaft 8 is passed through so as to be surrounded by the pad 6. An oil guide hole 10 is provided in the outer frame 4, and this oil guide hole 1
0 communicates with a hydraulic pump (not shown). The pad 6 has a curved surface shape along the rotating shaft 8, and a pivot 12 is fixed to approximately the center of the outer frame 4 side, and the pivot 12 is inserted into a recess 14 provided in the outer frame 4. Outer frame 4 of pivot 12
The side has a spherical shape and is in contact with a backing plate 16 provided at the back of the recess 14.
従って、回転軸６の周囲に設けられた各パッド６はピボ
ット１２により、そのピボット１２の外枠４側の中央部
を中心として傾動することができるようになっている。Therefore, each pad 6 provided around the rotary shaft 6 can be tilted by the pivot 12 about the center portion of the pivot 12 on the outer frame 4 side.
そして、外枠４には、このパッド６のうち回転軸８の下
側に位置する２つのパッド６をこの回転軸８の外周面に
対して傾動させる移動装置が設けられている。The outer frame 4 is provided with a moving device that tilts the two pads 6 of the pads 6 located below the rotary shaft 8 with respect to the outer peripheral surface of the rotary shaft 8.
即ち、上記パッド６のうち回転軸８の下方に設けられた
２つのパッド６には、その凹部１４の一側にパッド６に
向けて出退するピストン１８が設けられている。このピ
ストン１８は切換弁２０及び２２を介して油圧ポンプ２
６に連結しており、制御装置２４により切換弁２０及び
２２を操作することで、適宜に出・退できるようになっ
ている。又、回転軸８の下側の２つのパッド６には、そ
の凹部１４の他側、即ち、ピボット１２を挾んでピスト
ン１８の反対側にバネ１９が設けてあり、パッド６を回
転軸８側に付勢することでピストン１８に反力を付与で
きるようになっている 更に、これらパッド６にはピボット１２を貫通する導入
孔２８が設けてある。この導入孔２８はパッド６の回転
軸８の外周面に対向する面に開口しており、他端は圧力
測定器３０に連結している。圧力測定器３０は前記制御
装置２４に接続しており、この導入孔２８を介して回転
軸８の外周面とパッド６の内周面の間の圧力を測定し、
その値を制御装置２４に送るようになっている。なお、
３２，３４はその信号線の途中に設置された処理アンプ
である。That is, the two pads 6 provided below the rotary shaft 8 among the pads 6 are provided with the pistons 18 which are extended and retracted toward the pads 6 on one side of the recesses 14. This piston 18 is connected to the hydraulic pump 2 via switching valves 20 and 22.
The control device 24 operates the switching valves 20 and 22 so that the control device 24 can appropriately move in and out. Further, the two pads 6 below the rotary shaft 8 are provided with springs 19 on the other side of the recess 14, that is, on the opposite side of the piston 18 with the pivot 12 interposed therebetween. It is possible to apply a reaction force to the piston 18 by urging the pad 6 into the pad 6. Further, the pad 6 is provided with an introduction hole 28 penetrating the pivot 12. The introduction hole 28 is opened on the surface of the pad 6 facing the outer peripheral surface of the rotary shaft 8, and the other end is connected to the pressure measuring device 30. The pressure measuring device 30 is connected to the control device 24, and measures the pressure between the outer peripheral surface of the rotary shaft 8 and the inner peripheral surface of the pad 6 via the introduction hole 28,
The value is sent to the controller 24. In addition,
Reference numerals 32 and 34 denote processing amplifiers installed in the middle of the signal line.
次に、上記軸受２の作用について述べる。導油孔１０か
ら潤滑油を送り、外枠４内を潤滑油で満たした状態で回
転軸８を矢印Ａ方向に回転させると回転軸８とパッド６
との間に油膜が形成され回転軸８が支持される。Next, the operation of the bearing 2 will be described. When the rotating shaft 8 is rotated in the direction of arrow A while the lubricating oil is fed from the oil guide hole 10 and the outer frame 4 is filled with the lubricating oil, the rotating shaft 8 and the pad 6 are rotated.
An oil film is formed between and to support the rotating shaft 8.
そして、この状態で回転軸８に振動が発生すると、パッ
ド６と回転軸８との間の油膜圧力が回転軸８の振動速度
の変化にほぼ比例したかたちで変動する。したがって、
その圧力変動は導入孔２８を介して圧力測定器３０で測
定され、処理アンプ３２及び３４に送られる。処理アン
プ３２及び３４では圧力値をＡＣ成分とＤＣ成分とに分
離し、ＡＣ成分すなわち変動分について適宜な処理（比
例倍や微分又は積分を含む各種演算処理）を行なって制
御装置２４に送る。When vibration occurs in the rotary shaft 8 in this state, the oil film pressure between the pad 6 and the rotary shaft 8 fluctuates in a manner substantially proportional to the change in the vibration speed of the rotary shaft 8. Therefore,
The pressure fluctuation is measured by the pressure measuring device 30 via the introduction hole 28 and sent to the processing amplifiers 32 and 34. The processing amplifiers 32 and 34 separate the pressure value into an AC component and a DC component, perform appropriate processing (various arithmetic processing including proportional multiplication, differentiation, or integration) on the AC component, that is, a fluctuation component, and send it to the controller 24.
制御装置２４はこの処理信号に基づき切換弁２０及び２
２に指令信号を出す。その指令信号は、切換弁２０等の
作動によって駆動されるパッド６が回転軸８の振動を減
少させるような信号である。Based on this processed signal, the controller 24 switches the switching valves 20 and 2
Issue a command signal to 2. The command signal is a signal such that the pad 6 driven by the operation of the switching valve 20 or the like reduces the vibration of the rotary shaft 8.
具体的には、例えば、制御装置２４が切換弁２０，２２
にポンプ２６からの圧油をピストン１８に供給する指令
信号を送ると、ピストン１８はパッド６の外周面を押圧
する。すると、このパッド６はピボット１２の球面状と
なる外枠４側中央部を支点としてバネ１９の付勢力に抗
して第１図において反時計回り方向に回動する。従っ
て、パッド６が回転軸８の外周面に対して傾動して両者
の間隔を変位させることで、パッド６と回転軸８との間
に形成されている油膜圧力が変化し、回転軸８に対する
制振効果が高まる。Specifically, for example, the control device 24 causes the switching valves 20, 22 to
When a command signal for supplying pressure oil from the pump 26 to the piston 18 is sent to the piston 18, the piston 18 presses the outer peripheral surface of the pad 6. Then, the pad 6 rotates counterclockwise in FIG. 1 against the biasing force of the spring 19 with the central portion of the pivot 12 on the outer frame 4 side, which is spherical, as a fulcrum. Therefore, the pad 6 tilts with respect to the outer peripheral surface of the rotating shaft 8 and displaces the distance between the two, whereby the oil film pressure formed between the pad 6 and the rotating shaft 8 changes, and the pad 6 with respect to the rotating shaft 8 changes. The damping effect is enhanced.
なお、制御装置２４の指令信号が停止すると、ピストン
１８は後退してパッド６の押圧をやめる。すると、パッ
ド６はバネ１９によって元の位置に復帰する。When the command signal from the control device 24 is stopped, the piston 18 retracts and stops pressing the pad 6. Then, the pad 6 is returned to the original position by the spring 19.
以上述べたように、本考案の軸受２によれば、回転軸８
の振動によって変動するパッド６と回転軸８との間の油
膜の圧力を測定し、この油膜圧力を基にして回転軸８の
振動が減少するようにパッド６を傾動させることとした
ので、回転軸８の振動を減少させることができる。As described above, according to the bearing 2 of the present invention, the rotating shaft 8
The pressure of the oil film between the pad 6 and the rotary shaft 8 which fluctuates due to the vibration of the rotary shaft 8 is measured, and the pad 6 is tilted so as to reduce the vibration of the rotary shaft 8 based on this oil film pressure. Vibration of the shaft 8 can be reduced.
上述の実施例において、本考案の構成要素の一つである
移動装置をピストン１８とバネ１９によって構成した
が、本考案はこれに限定されるものではなく、ピストン
１８に代えて電磁石とし、制御装置２４からはこの電磁
石を適宜に作動させる信号を送出させるようにしてもよ
い。このようにすれば油圧ポンプ２６等ピストン１８を
作動させる油圧系が不要となる。又電磁石以外でも圧電
素子を用いたアクチュエータとしてもよい。In the above-described embodiment, the moving device, which is one of the constituent elements of the present invention, is constituted by the piston 18 and the spring 19, but the present invention is not limited to this, and instead of the piston 18, an electromagnet may be used. A signal may be sent from the device 24 to activate this electromagnet appropriately. This eliminates the need for a hydraulic system such as the hydraulic pump 26 that operates the piston 18. An actuator using a piezoelectric element may be used instead of the electromagnet.
〈考案の効果〉 本考案の軸受によれば、圧力測定器によってパッドと回
転軸との間の油膜圧力を測定して制御装置は回転軸の振
動状態が検知でき、これに基づいて移動装置がパッドの
傾動を適宜に調整して回転軸の振動を低減させることが
できるので、軸受の減衰係数とばね定数とを独立に選択
可能となる。それ故、減衰係数の高い軸受を実現でき、
流体力学的な外乱による励振力の大きい機械や、固有振
動数の低いフレキシブルロータを持った機械の設計が容
易となる。<Effect of device> According to the bearing of the present invention, the control device can detect the vibration state of the rotating shaft by measuring the oil film pressure between the pad and the rotating shaft by the pressure measuring device, and the moving device can detect the vibration state based on this. Since the tilt of the pad can be adjusted appropriately to reduce the vibration of the rotating shaft, the damping coefficient of the bearing and the spring constant can be independently selected. Therefore, it is possible to realize a bearing with a high damping coefficient,
This facilitates the design of machines with large excitation force due to hydrodynamic disturbances and machines with flexible rotors with low natural frequencies.
第１図は本考案にかかる軸受の一実施例を示す断面図、
第２図及び第３図は従来例を示す断面図である。 図面中、 ２は軸受、 ４は外枠、 ６はパッド、 ８は回転軸、 １２はピボット、 １８はピストン、 ２０，２２は切換弁、 ２４は制御装置、 ２６は油圧ポンプ、 ２８は導入孔、 ３０は圧力測定器である。FIG. 1 is a sectional view showing an embodiment of a bearing according to the present invention,
2 and 3 are sectional views showing a conventional example. In the drawings, 2 is a bearing, 4 is an outer frame, 6 is a pad, 8 is a rotary shaft, 12 is a pivot, 18 is a piston, 20 and 22 are switching valves, 24 is a control device, 26 is a hydraulic pump, 28 is an introduction hole. 30 is a pressure measuring device.
Claims (1)
た複数のパッドを配置し、これらパッドと前記回転軸の
外周面との間に形成される油膜を介して当該回転軸を支
持する軸受において、前記油膜の圧力を測定する圧力測
定器と、前記パッドのうち前記回転軸の下側に位置する
パッドを前記回転軸の外周面に対して傾動させる移動装
置と、前記圧力測定器からの検出信号に基づいて前記移
動装置の作動を制御する制御装置とを具えたことを特徴
とする軸受。1. A plurality of pads each having a central portion pivotally supported are arranged around a rotary shaft, and the rotary shaft is supported through an oil film formed between the pads and an outer peripheral surface of the rotary shaft. In the bearing, a pressure measuring device that measures the pressure of the oil film, a moving device that tilts a pad of the pad located below the rotating shaft with respect to an outer peripheral surface of the rotating shaft, and the pressure measuring device. And a control device that controls the operation of the moving device based on the detection signal of the bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987106283U JPH0623766Y2 (en) | 1987-07-13 | 1987-07-13 | bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987106283U JPH0623766Y2 (en) | 1987-07-13 | 1987-07-13 | bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6411424U JPS6411424U (en) | 1989-01-20 |
| JPH0623766Y2 true JPH0623766Y2 (en) | 1994-06-22 |
Family
ID=31339648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987106283U Expired - Lifetime JPH0623766Y2 (en) | 1987-07-13 | 1987-07-13 | bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0623766Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5463211B2 (en) * | 2010-06-09 | 2014-04-09 | 株式会社日立製作所 | Tilting pad type journal bearing device and steam turbine using the same |
| JP5922809B1 (en) * | 2015-01-30 | 2016-05-24 | 三菱日立パワーシステムズ株式会社 | Tilting pad bearing and rotating machine |
| JP7774487B2 (en) * | 2022-03-28 | 2025-11-21 | 三菱重工コンプレッサ株式会社 | Tilting Pad Bearing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4823836U (en) * | 1971-07-28 | 1973-03-19 | ||
| JPS53104056A (en) * | 1977-02-22 | 1978-09-09 | Toshiba Corp | Bearing |
| JPS56124320U (en) * | 1980-02-22 | 1981-09-22 |
-
1987
- 1987-07-13 JP JP1987106283U patent/JPH0623766Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6411424U (en) | 1989-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6220945B1 (en) | Polishing apparatus | |
| CA1050597A (en) | Flexible damped bearing support | |
| JP2556990B2 (en) | Self-loading deflection control roll | |
| JPH02163248A (en) | Winder | |
| JPH0623766Y2 (en) | bearing | |
| CA2000669A1 (en) | Dynamic motor controller | |
| JPH11277406A (en) | Polishing device | |
| JPH0953640A (en) | Static pressure bearing device | |
| JPS594553B2 (en) | Swash plate type axial piston machine with tiltable cylinder block | |
| JP2019155531A (en) | Polishing device | |
| JPH10299770A (en) | Bearing device for rotatable shaft body | |
| JPH09126228A (en) | Pressure dam type journal bearing | |
| JPH0625698Y2 (en) | Tilting pad bearing | |
| JP3143582B2 (en) | Hydrostatic bearing device and positioning stage using the same | |
| JPH0534087B2 (en) | ||
| JPH0678768B2 (en) | bearing | |
| JPH04159067A (en) | Roller polishing device | |
| JP4465778B2 (en) | Rotating body support device | |
| JP2552914Y2 (en) | Surface polishing machine | |
| JP2012035967A (en) | Brake device | |
| JPS62270822A (en) | Vertically moving device | |
| JP2508506Y2 (en) | Vibration suppression device for rotating machinery | |
| JP2003117785A (en) | Work grinding apparatus | |
| JPH0110153Y2 (en) | ||
| JPH03239407A (en) | Bearing device |