JPS6088216A - Dynamic pressure type thrust bearing - Google Patents

Dynamic pressure type thrust bearing

Info

Publication number
JPS6088216A
JPS6088216A JP19432383A JP19432383A JPS6088216A JP S6088216 A JPS6088216 A JP S6088216A JP 19432383 A JP19432383 A JP 19432383A JP 19432383 A JP19432383 A JP 19432383A JP S6088216 A JPS6088216 A JP S6088216A
Authority
JP
Japan
Prior art keywords
foil
thrust
bearing
wheel
supported
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
Application number
JP19432383A
Other languages
Japanese (ja)
Inventor
Toto Takatani
高谷 任人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP19432383A priority Critical patent/JPS6088216A/en
Publication of JPS6088216A publication Critical patent/JPS6088216A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00Sliding-contact bearings for exclusively rotary movement
    • F16C17/04Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/042Sliding-contact bearings for exclusively rotary movement for axial load only with flexible leaves to create hydrodynamic wedge, e.g. axial foil bearings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Support Of The Bearing (AREA)

Abstract

PURPOSE:To obtain smooth starting and to withstand large thrust force by making starting torque smaller by changing the number of flexible wheels acting on a thrust member with the transfer of the thrust member in the axial direction. CONSTITUTION:A plurality of wheels 1, 1' disposed in the circumferential direction are securedby point welding 6 to by point welding 6 wheel securing faces 5, 5' having different inclinations in the radial direction on a bearing member 4, and supported by wheel supporting members 2 having elasticity and stored in storing grooves provided on the bearing member 4. The inclination of the wheel securing face 5 is made larger than that of the wheel securing face 5', and the height of the wheel 1 from a bearing member face 8 of a free end 7 is made higher than that of the wheel 5' from the bearing member face 8 of a free end 9. By this, when thrust force is small at the time of starting of a rotor and in the range of low rotating speed, thrust force is supported only by the wheel 1 and when the rotating speed of the rotor is increased, the thrust force is supported also by the wheel 1'.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は動圧型スラスト軸受に係り、起動時には小さな
起動トルクで円滑な運転ができかつ、大きなスラスト力
にも十分耐えうる軸受負荷能力を持つ動圧型スラスト軸
受に関するものである。
[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a dynamic pressure type thrust bearing, which enables smooth operation with a small starting torque at startup and has a bearing load capacity that can sufficiently withstand large thrust forces. This relates to compression type thrust bearings.

〔発明の背景〕[Background of the invention]

第1図に動圧型スラスト軸受の軸受部の構成の概要を示
す。ロータfと一体となっているスラスト部材eを支持
するために、スラスト部材eの両側には、軸受部材dと
可撓性フォイルa、フォイル支持部材すから成るスラス
ト軸受が配置されており、軸受部え板iにより、締付ボ
ルトgで軸受ケーシングhに組込まれている。弾性力の
あるフオイル支持部材すは軸受部材dに設けられたフォ
イル支持部材格納溝Cに格納されており、このフォイル
支持部材すによりフォイルをスラスト部材eに押え付け
、スラスト部材eを支持している。
FIG. 1 shows an overview of the structure of the bearing section of a hydrodynamic thrust bearing. In order to support the thrust member e that is integrated with the rotor f, thrust bearings consisting of a bearing member d, a flexible foil a, and a foil support member are arranged on both sides of the thrust member e. It is assembled into the bearing casing h by means of a retaining plate i and a tightening bolt g. An elastic foil support member is stored in a foil support member storage groove C provided in the bearing member d, and this foil support member presses the foil against the thrust member e and supports the thrust member e. There is.

また、軸受部材4間には、スラスト部材(・の軸方向の
変位量を規制するためのスペーサgが設けられている。
Further, a spacer g is provided between the bearing members 4 for regulating the amount of displacement in the axial direction of the thrust member.

ターボ機械用の動圧型スラスト軸受には、特に。Especially for hydrodynamic thrust bearings for turbomachinery.

以下の(1) 、(2) 、(3)の項目を同時に満1
.jすることが要求される。
Satisfy the following items (1), (2), and (3) at the same time.
.. j is required.

(1)起動時にはスラスト部材eとフォイルaとの摩擦
による起動トルクをできるだけ小さくする。
(1) At the time of starting, the starting torque due to the friction between the thrust member e and the foil a is made as small as possible.

起動時には、スラスト部材eとフォイルaは固体接触を
するために、起動トルクが大きいとロータの回転速度が
上昇せずに、スラスト部材C!並びにフォイルaは大き
く摩耗を受ける。
At startup, the thrust member e and the foil a are in solid contact, so if the startup torque is large, the rotational speed of the rotor does not increase and the thrust member C! Foil a is also subject to significant wear.

(2)停止時には、フォイルaはフォイルJJ4持部材
eの弾性力によりスラスト部材eに押付けられた形に構
成する。特に、スラスト部材eとフォイルaが接触せず
に隙間がある場合には円滑な起!!IIが行なえず、起
動時には軸方向の変動が大きくなり軸受破損の原因とな
る。
(2) When stopped, the foil a is pressed against the thrust member e by the elastic force of the foil JJ4 holding member e. Particularly, if the thrust member e and the foil a do not contact each other and there is a gap, smooth lifting is possible. ! II cannot be carried out, and the fluctuation in the axial direction becomes large at startup, causing bearing damage.

(3)大きなスラスト力にも十分耐えうる軸受負荷能力
を有する。
(3) It has a bearing load capacity that can sufficiently withstand large thrust forces.

従来の動圧型スラスト軸受を第2図、第3図に示す。第
3図は第2図を展開して見たものである。
Conventional dynamic pressure type thrust bearings are shown in FIGS. 2 and 3. Figure 3 is an expanded view of Figure 2.

図に示したように、従来の軸受は、フォイルaとフォイ
ルaを弾性支持するフォイル支持部材b、フォイル支持
部材すを格納するフォイル支持部材格納溝Cを有する軸
受部材dから成り、フォイルaは周方向に複数個配置さ
れている。また、フォイルaは軸受部材dに設けられた
周方向に傾斜をもつフォイル固定面kに点溶接Q等によ
り固定されている。この場合、各々のフォイル1並びに
フォイル支持部材すは同一形状、同一バネ定数をもって
いる。
As shown in the figure, the conventional bearing consists of a foil a, a foil support member b that elastically supports the foil a, and a bearing member d having a foil support member storage groove C that stores the foil support member. Multiple pieces are arranged in the circumferential direction. Further, the foil a is fixed to a circumferentially inclined foil fixing surface k provided on the bearing member d by spot welding Q or the like. In this case, each foil 1 and foil support member have the same shape and the same spring constant.

そこで、従来の軸受では、上記(1) 、 (2)の条
件を満足するために比較的バネ定数の小さいフォイル支
持部材すを使用しており、このため起動時は小さな起動
トルクで円滑な起動が行なえた。しかし、定格点におい
て大きなスラスト力が作用した場合には十分な軸受負荷
能力を持つことができず、回転しているスラスト部材8
が静止しているスラスト部材に接触し、フォイルaが焼
111シたりして軸受破損の原因となっていた。一方、
従来の軸受で大きなスラスト力に耐える軸受としては、
大きなバネ定数をもった剛性の大きいフォイル支持部材
すが使われている。しかし、この大きなバネ定数をもつ
フォイル支持部材すでフォイルaを支持した場合では、
スラスト部材eがフォイルで押付けられるように構成す
ると、バネ定数の大きなフオイ°ルを支持部材すを使っ
ているため起動時にはどうしても起動トルクが大きくな
り、起動。
Therefore, in order to satisfy the conditions (1) and (2) above, conventional bearings use a foil support member with a relatively small spring constant, which allows for smooth startup with a small starting torque. I was able to do it. However, if a large thrust force is applied at the rated point, sufficient bearing load capacity cannot be achieved, and the rotating thrust member 8
The foil a came into contact with a stationary thrust member, causing the foil a to burn out and cause damage to the bearing. on the other hand,
Conventional bearings that can withstand large thrust forces include:
A highly rigid foil support member with a large spring constant is used. However, when the foil support member with this large spring constant already supports foil a,
If the thrust member e is configured to be pressed by a foil, since the foil with a large spring constant is used as a support member, the starting torque will inevitably increase during startup.

停止の際の固体接触時には、フォイル84及びにスラス
ト部材eは大きな摩耗を受け、軸受を破損したりあるい
は軸受の寿命を短くしている。。
During solid contact during stopping, the foil 84 and the thrust member e are subject to significant wear, which can damage the bearing or shorten its lifespan. .

〔発明の目的〕[Purpose of the invention]

本発明の目的は起動時のロータと軸受面との摩擦による
起動トルクを小さくし、起動を円滑に行うと共に、大き
なスラスト力にも十分耐ようる動圧型スラスト軸受を提
供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a dynamic pressure type thrust bearing that reduces the starting torque due to friction between the rotor and the bearing surface during starting, allows smooth starting, and can sufficiently withstand large thrust forces.

〔発明の概要〕[Summary of the invention]

本発明は発明者等が鋭意研究、試験した結果以下のこと
が判明した。
As a result of extensive research and testing by the inventors of the present invention, the following findings were found.

起動を容易にするためには、フォイルとスラスト部材の
固体接触による摩擦を小さくしなければならず、そのた
めには、フォイル支持部材のバネ定数は小さい方が良い
。また、フォイルとスラスト部材の接触面積は小さい方
が良い。ことがわかった。一方、大きいスラスト力に耐
えるためには、フォイル支持部材のバネ定数の大きい方
が良い。
In order to facilitate starting, it is necessary to reduce the friction caused by the solid contact between the foil and the thrust member, and for this purpose, the spring constant of the foil support member is preferably small. Further, the contact area between the foil and the thrust member is preferably small. I understand. On the other hand, in order to withstand a large thrust force, it is better for the foil support member to have a large spring constant.

スラスト力を支持する面積の大きい方が良い。ことがわ
かった。
The larger the area supporting the thrust force, the better. I understand.

そこで、起動を容易にし、かつ大きいスラスト力に耐え
る本発明の軸受として、以下の技術的手段を講じている
Therefore, the following technical measures have been taken as a bearing of the present invention that facilitates startup and can withstand large thrust forces.

(1)周方向に複数個配置されているフォイルのうち、
起動時には一部分のフォイルでスラスト力を支持するよ
うにすることで、フォイルとスラスト部材の接触面積を
小さくして起動トルクを減らし、定格点の大きいスラス
ト力が作用した場合にはすべてのフォイルでスラスト力
を支持できるように、フォイル支持部材で支持されるフ
ォイルの自由端の高さが異なるように構成した。
(1) Among multiple foils arranged in the circumferential direction,
By supporting the thrust force with a portion of the foils during startup, the contact area between the foil and the thrust member is reduced and the startup torque is reduced, and when a large thrust force at the rated point is applied, all foils are used to support the thrust force. The heights of the free ends of the foils supported by the foil support members were configured to be different in order to support the forces.

(2)周方向に複数個配置されたフォイルを支持するフ
ォイル支持部材のフォイルとの接触点高さが異なるよう
に構成することにより、起動時の小さなスラスト力時に
は、スラスト部材はフォイルとの接触点高さの高い一部
のフォイル支持部材で支持されたフォイルで支持される
ようにすることで起動トルクを減らし、定格点の大きい
スラスト力が作用した場合にはすべてのフォイルでスラ
スト力を支持できるようにする。
(2) By configuring the foil support member that supports a plurality of foils arranged in the circumferential direction so that the height of the contact point with the foil is different, the thrust member does not come into contact with the foil when the thrust force is small at startup. The starting torque is reduced by supporting the foils supported by some foil support members with high point height, and when a large thrust force at the rated point is applied, all foils support the thrust force. It can be so.

(3)上記(1) 、 (2)の場合において、FA励
動時スラスト力が小さい時にはフォイルを支持するのに
寄与するフォイル支持部材にはバネ定数の小さいものを
用いて起動トルクを減らし、また、定格点の大きいスラ
スト力が作用した場合には、フォイルを支持するのに寄
与するフォイル支持部材にはバネ定数の大きいものを用
いることに、1、り人さなスラスト力にも十分耐えるよ
うにする。
(3) In the cases of (1) and (2) above, when the thrust force during FA excitation is small, a foil support member with a small spring constant that contributes to supporting the foil is used to reduce the starting torque; In addition, when a large thrust force is applied at the rated point, it is important to use a foil support member with a large spring constant that can withstand the large thrust force. Do it like this.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の動圧型スラスト軸受の一実施例を第4図
、第5図により説明する。第4図はその正面図(第1図
のP−P矢視相当図)を示し、第5図は第4図のB−B
矢視展開図である。
Hereinafter, one embodiment of the dynamic pressure type thrust bearing of the present invention will be described with reference to FIGS. 4 and 5. Figure 4 shows its front view (view corresponding to the P-P arrow in Figure 1), and Figure 5 shows the B-B in Figure 4.
It is a developed view in arrow direction.

周方向に複数個配置されたフォイルl、1′は軸受部材
4に半径方向に異なった傾斜を持つフォイル固定面5,
5′に点溶接6で固定され、軸受部材4に設けられたフ
ォイル支持部材格納溝3に格納された弾性力のあるフォ
イル支持部材2により支持されている。そこで、フォイ
ル1を軸受部材4に固定するフォイル固定面5の傾斜を
フォイル1′の場合の傾斜より大きくすることにより。
A plurality of foils l, 1' arranged in the circumferential direction are attached to the bearing member 4 with foil fixing surfaces 5, which have different inclinations in the radial direction.
5' by spot welding 6, and is supported by an elastic foil support member 2 stored in a foil support member storage groove 3 provided in a bearing member 4. Therefore, the inclination of the foil fixing surface 5 for fixing the foil 1 to the bearing member 4 is made larger than the inclination in the case of the foil 1'.

フォイル1の自由端7の軸受部材面8からの高さをフォ
イル1′の自由端9の軸受部材面8からの高さより高く
している。
The height of the free end 7 of the foil 1 from the bearing member surface 8 is greater than the height of the free end 9 of the foil 1' from the bearing member surface 8.

次に、その動作を説明する。停止時には、スラスト部材
はスラスト部材両側に配置されている、フォイル1,1
′の自由端の高さの高い一部のフォイル支持部材2によ
って支持されているフォイル1,1′によって押え付け
られた形で支持されている。
Next, its operation will be explained. When stopped, the thrust member is moved by the foils 1, 1 arranged on both sides of the thrust member.
The foils 1, 1' are supported in a pressed manner by the foils 1, 1', which are supported by some high foil support members 2 at the free ends of the foils 1, 1'.

ロータが回転し始めた起動時並びに低回転速度域のスラ
スト力が小さい時は、フォイル【の自由端の高さの高い
一部のフォイルlのみで支持されるようになる。このた
め、従来に増してスラスト部材とフォイル1の接触面積
は小さく、起動時のスラスト部材とフォイルlとの固体
接触による起動トルクを小さくすることができ、同時に
円滑な起動を行なうことができる。
At startup when the rotor begins to rotate and when the thrust force is small in the low rotational speed range, the foil is supported only by a portion of the foil with a high free end. Therefore, the contact area between the thrust member and the foil 1 is smaller than in the past, and the starting torque due to solid contact between the thrust member and the foil 1 during startup can be reduced, and at the same time smooth startup can be achieved.

ロータの回転速度がさらに上昇してスラスト力が大きく
なると、スラスト部材はフォイルlの自由端の高さの高
いフォイルlを押しながら軸方向に移動するため、フォ
イルの自由端の高さの低いフォイル1′によってもスラ
スト力の支持が行われるようになる。このため、スラス
ト力を支持するフォイルの面積が大きくなり大きなスラ
ス1へ力にも十分耐える軸受負荷能力を有することがで
きる。
When the rotational speed of the rotor further increases and the thrust force increases, the thrust member moves in the axial direction while pushing the foil l, which has a high free end height, so that the foil l, which has a low free end height, 1' also supports the thrust force. Therefore, the area of the foil that supports the thrust force is increased, and the bearing load capacity that can sufficiently withstand the force applied to the large thrust force 1 can be obtained.

本発明の他の実施例を第6図に示す。周方向に複数個配
置されたフォイルlは軸受部材4に半径方向に傾斜を持
つフォイル固定面5に点溶接6で固定され、軸受部材4
に設けられたフォイル支持部材格納溝3には、軸受部材
面8を基準としたフォイル1との接触点の高さ10.1
1が異なるフォイル支持部材2,2′が格納されている
Another embodiment of the invention is shown in FIG. A plurality of foils l arranged in the circumferential direction are fixed to the bearing member 4 by spot welding 6 to a foil fixing surface 5 inclined in the radial direction.
The height of the contact point with the foil 1 with respect to the bearing member surface 8 is 10.1.
1, different foil support members 2, 2' are stored.

動作を説明すると、停止時には、スラスト部材はスラス
ト部材両側に配置されている軸受部材面8を基準とした
フォイル1との接触点高さの高い1〇一部のフォイル支
持部材2で支持されたフォイル1によって押え付けられ
た形にし、その他のフォイル1はフォイル支持部材2′
と非接触にしている。従って、起動時のスラスト部材が
小さい時には従来に増して、スラスト部材とフォイル1
との固体接触による起動トルクを減らすことができる。
To explain the operation, when the thrust member is stopped, the contact point with the foil 1 is high based on the bearing member surface 8 arranged on both sides of the thrust member. The other foils 1 are held down by the foil support member 2'.
I have no contact with him. Therefore, when the thrust member is small at startup, the thrust member and foil 1
The starting torque due to solid contact with the product can be reduced.

ロータの回転速度が上昇してスラスト力が大きくなると
、スラスト部材は軸方向に移動するため、フォイルとの
接触点高さの高いフォイル支持部材2によって支持され
たフォイルによるスラストカの支持に加えて、フォイル
との接触点高さの低い11フォイル支持部材2′によっ
て支持されたフォイル1によってもスラスト力の支持が
行われるので、大きなスラスト力にも十分にmlえろこ
とができる。
As the rotational speed of the rotor increases and the thrust force increases, the thrust member moves in the axial direction, so in addition to the support of the thrust force by the foil supported by the foil support member 2 whose contact point with the foil is high, Since the thrust force is also supported by the foil 1 supported by the foil support member 2' having a low height at the contact point with the foil, it is possible to sufficiently compensate for a large thrust force.

本発明の更に他の実施例を第7図に示す。周方向に複数
個交互には置されたフォイル1,1′は。
Still another embodiment of the invention is shown in FIG. A plurality of foils 1, 1' are arranged alternately in the circumferential direction.

軸受部材4に半径方向に異なった傾斜を持つフォイル固
定面5,5′に点溶接6で固定され、軸受部材4に設け
られたフォイル支持部材格納溝3に格納された弾性力の
あるバネ定数の異なるフォイル支持部材2,2′により
支持されている。−tこで、フォイル1を軸受部材に固
定するフォイル固定面の傾斜をフォイル1′の場合の傾
斜より大きくすることにより、フォイル1の自由端7の
軸受部材面8からの高さをフォイル1′の自由端9の軸
受部材面8からの高さより高くしており、フォイル1を
弾性支持するフォイル支持部材にはバネ定数の小さいフ
ォイル支持部材2を、フォイル1′を弾性支持するフォ
イル支持部材にはバネ定数の大きいフォイル支持部材2
′を用いている。
An elastic spring constant is fixed to the bearing member 4 by spot welding 6 to the foil fixing surfaces 5, 5' having different inclinations in the radial direction, and stored in the foil support member storage groove 3 provided in the bearing member 4. It is supported by different foil support members 2, 2'. -t Now, by making the slope of the foil fixing surface for fixing the foil 1 to the bearing member larger than the slope in the case of the foil 1', the height of the free end 7 of the foil 1 from the bearing member surface 8 can be increased. ' is higher than the height of the free end 9 from the bearing member surface 8, and the foil support member 2 with a small spring constant is used as the foil support member that elastically supports the foil 1, and the foil support member 2 that elastically supports the foil 1' is used. is a foil support member 2 with a large spring constant.
' is used.

次に、その動作を説明する。停止時には、スラスト部材
はスラスト部材両側に配置されているバネ定数の小さい
フォイル支持部材2で支持されたフォイル1により押え
付けられた形で支持されている。この時には、バネ定数
の大きいフォイル支持部材2′で支持されたフォイル1
′はスラスト部材と離れており、スラスト部材の支持に
は寄与していない。ロータが回転し始めた起動時並びに
低回転速度域ではスラスト力が小さく、スラスト部材は
バネ定数の小さいフォイル支持部材2で支持されたフォ
イル1のみで支持されるようになる。
Next, its operation will be explained. When the thrust member is stopped, the thrust member is supported in a pressed manner by the foil 1 supported by foil support members 2 having a small spring constant and arranged on both sides of the thrust member. At this time, the foil 1 supported by the foil support member 2' having a large spring constant
' is separate from the thrust member and does not contribute to supporting the thrust member. The thrust force is small at startup when the rotor begins to rotate and in a low rotational speed range, and the thrust member is supported only by the foil 1 supported by the foil support member 2 with a small spring constant.

このため、従来に増してスラスト部材とフォイルの接触
面積を/hさくでき、かつバネ定数の小さいフォイル支
持部材2による支持が行われるので、起動時にはスラス
ト部材とフォイル1との剛体接触による起動トルクを小
さくすることができ、同時に円滑な起動を行うことがで
きる。
Therefore, the contact area between the thrust member and the foil can be made smaller than before, and support is provided by the foil support member 2 with a small spring constant, so that at startup, the starting torque is generated by the rigid contact between the thrust member and the foil 1. can be made smaller and at the same time can perform smooth startup.

ロータの回転速度がさらに上昇して、スラスト力が大き
くなると、次第にバネ定数の大きいフォイル支持部材2
′で支持されたフォイル1′によるスラスト部材の支持
が行われるようになる。このため、大きなスラスト力に
も十分耐える軸受負荷能力を有することができる。本発
明のまた更に他の実施例を第8図に示す。この実施例が
先の第7図の場合と異なる所は、フォイルl、1′を固
定する軸受部材4に設けられたフォイル固定面5が傾斜
を持たずに軸受部材面8と平行にかつ、軸受部材面より
1段低くしたことのみである。したがって、この場合に
おいても先の場合と同様に、起動時のスラスト力が小さ
い時には、バネ定数の小さい弾性力のあるフォイル支持
部材2により支持されたフォイル1のみでスラスト力が
支持されるため、起動トルクは小さくでき、かつ1[3
滑な起動が行なえる。そして、大きなスラスト力が加わ
ってスラスト部材が軸方向に移動すると、バネ定数の大
きなフォイル支持部材2′によるスラスト力の支持が行
われるようになり、大きいスラスト力を支持することが
できる。
As the rotational speed of the rotor further increases and the thrust force increases, the foil support member 2 with a gradually larger spring constant
The thrust member is now supported by the foil 1' supported by the foil 1'. Therefore, it is possible to have a bearing load capacity that can sufficiently withstand large thrust forces. Still another embodiment of the present invention is shown in FIG. This embodiment differs from the previous case of FIG. 7 in that the foil fixing surface 5 provided on the bearing member 4 that fixes the foils 1 and 1' is parallel to the bearing member surface 8 without having an inclination, and The only difference is that it is one step lower than the bearing member surface. Therefore, in this case, as in the previous case, when the thrust force at startup is small, the thrust force is supported only by the foil 1 supported by the foil support member 2 with a small spring constant and elastic force. Starting torque can be made small and 1 [3
Allows for smooth startup. Then, when a large thrust force is applied and the thrust member moves in the axial direction, the thrust force is supported by the foil support member 2' having a large spring constant, and the large thrust force can be supported.

〔発明の効果〕〔Effect of the invention〕

本発明による動圧型スラスト軸受は、起動時にはフォイ
ルとスラスト部材の固体接触時の固体接触面積を小さく
したり、バネ定数の小さいフォイル支持部材によりフォ
イルを支持することができるため、従来の動圧型スラス
ト軸受に比して、起動トルクを大幅に低減することがで
きる。また、ロータの回転速度が上昇してスラスト力が
大きくなると、スラスト力を支持するフォイル数を多く
したり、バネ定数の大きいフォイル支持部材により支持
されたフォイルによりスラスト力の支持を行なうことが
できるので、大きなスラスト力にも十分に耐える軸受負
荷能力を有することができる。
The dynamic pressure type thrust bearing according to the present invention can reduce the solid contact area when the foil and the thrust member are in solid contact during startup, and can support the foil by a foil support member with a small spring constant. Starting torque can be significantly reduced compared to bearings. Additionally, as the rotational speed of the rotor increases and the thrust force increases, the number of foils supporting the thrust force can be increased, or the thrust force can be supported by foils supported by a foil support member with a large spring constant. Therefore, it can have a bearing load capacity that can sufficiently withstand large thrust forces.

【図面の簡単な説明】[Brief explanation of drawings]

第1@は従来の動圧型スラスト軸受の要部断面図、第2
図は第1図のP−P矢視図、第3図は第2図のA−A断
面図、第4図は本発明の動圧型スラスト軸受の平面図(
第1図のP−P矢視相当図)、第5図は第4図のB−B
断面図、第6図〜第8図は本発明の他の実施例を示す図
で第4図のB−B断面図である。 1.1′・・・可撓性フォイル、2,2′・・・フォイ
ル支持部材、3・・・フォイル支持部材格納溝、4・・
・軸受部材、5,5′・・・フォイル固定面、6・・・
点溶接。 fJl 図 ’4 z 図 第 3 図 χ 4 図 第 5 ロ 篤乙図 χ 7 図 第 g 図
Part 1 is a sectional view of the main parts of a conventional hydrodynamic thrust bearing, Part 2
The figure is a view taken along the line P-P in FIG. 1, FIG. 3 is a sectional view taken along the line A-A in FIG. 2, and FIG.
(A view corresponding to the P-P arrow in Fig. 1), Fig. 5 is a view corresponding to B-B in Fig. 4.
The sectional views, FIGS. 6 to 8, are views showing other embodiments of the present invention, and are sectional views taken along the line B--B in FIG. 4. 1.1'...Flexible foil, 2,2'...Foil support member, 3...Foil support member storage groove, 4...
・Bearing member, 5, 5'... Foil fixing surface, 6...
Spot welding. fJl Figure '4 z Figure 3 Figure χ 4 Figure 5 B Atsushi Figure χ 7 Figure g

Claims (1)

【特許請求の範囲】 1、静止した軸受部材と、該軸受部材に対向し受部材に
固定された複数の可撓性フオrルど、前記可撓性フォイ
ルと前記軸受部材との間に配置され前記可撓性フォイル
を弾性支持するフォイル支持部材とを備えた動圧型スラ
スト軸受において、前記スラスト部材の軸方向の移動に
伴って該スラスト部材に作用する前記可撓性フォイル数
が変化するように構成したことを特徴とする動圧型スラ
スト軸受。 2、前記可撓性フォイルは該可撓性フォイルの自由端高
さが異なるように構成したことを特徴とする特許請求の
範囲第1項記載の動圧型スラスト軸受。 3、前記フォイル支持部材は前記フオ・rルも弾性支持
する高さが異なるように構成したことを特徴とする特許
請求の範囲第1項記載の動圧型スラスト軸受。 4、前記フォイル支持部材は周方向にバネ定数が異なる
ように配置してなることを特徴とする特許請求の範囲第
1項記載の動圧型スラスト軸受。
[Claims] 1. A stationary bearing member, and a plurality of flexible foils facing the bearing member and fixed to the bearing member, disposed between the flexible foil and the bearing member. and a foil support member that elastically supports the flexible foils, the number of the flexible foils acting on the thrust member changes as the thrust member moves in the axial direction. A dynamic pressure type thrust bearing characterized by having the following structure. 2. The hydrodynamic thrust bearing according to claim 1, wherein the flexible foil is configured such that the free end heights of the flexible foil are different. 3. The hydrodynamic thrust bearing according to claim 1, wherein the foil supporting member is configured to elastically support the foils at different heights. 4. The hydrodynamic thrust bearing according to claim 1, wherein the foil support members are arranged so that spring constants differ in the circumferential direction.
JP19432383A 1983-10-19 1983-10-19 Dynamic pressure type thrust bearing Pending JPS6088216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19432383A JPS6088216A (en) 1983-10-19 1983-10-19 Dynamic pressure type thrust bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19432383A JPS6088216A (en) 1983-10-19 1983-10-19 Dynamic pressure type thrust bearing

Publications (1)

Publication Number Publication Date
JPS6088216A true JPS6088216A (en) 1985-05-18

Family

ID=16322676

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19432383A Pending JPS6088216A (en) 1983-10-19 1983-10-19 Dynamic pressure type thrust bearing

Country Status (1)

Country Link
JP (1) JPS6088216A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020137513A1 (en) * 2018-12-25 2020-07-02 株式会社Ihi Thrust foil bearing and method for manufacturing base plate of thrust foil bearing
JP2020115021A (en) * 2019-01-17 2020-07-30 株式会社Ihi Thrust foil bearing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020137513A1 (en) * 2018-12-25 2020-07-02 株式会社Ihi Thrust foil bearing and method for manufacturing base plate of thrust foil bearing
CN113227592A (en) * 2018-12-25 2021-08-06 株式会社Ihi Thrust foil bearing and method for manufacturing bottom plate of thrust foil bearing
CN113227592B (en) * 2018-12-25 2023-02-17 株式会社Ihi Thrust foil bearing and method for manufacturing bottom plate of thrust foil bearing
US11867226B2 (en) 2018-12-25 2024-01-09 Ihi Corporation Thrust foil bearing and method for manufacturing base plate of thrust foil bearing
JP2020115021A (en) * 2019-01-17 2020-07-30 株式会社Ihi Thrust foil bearing device

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