JPH03316A - Bearing unit for rotor driving device of helicopter - Google Patents

Bearing unit for rotor driving device of helicopter

Info

Publication number
JPH03316A
JPH03316A JP13308789A JP13308789A JPH03316A JP H03316 A JPH03316 A JP H03316A JP 13308789 A JP13308789 A JP 13308789A JP 13308789 A JP13308789 A JP 13308789A JP H03316 A JPH03316 A JP H03316A
Authority
JP
Japan
Prior art keywords
helicopter
rotor
driving device
weight
rotor driving
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.)
Granted
Application number
JP13308789A
Other languages
Japanese (ja)
Other versions
JP2952672B2 (en
Inventor
Keigo Yasui
安井 啓剛
Kazuo Rokkaku
和夫 六角
Hiroaki Takebayashi
竹林 博明
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.)
Koyo Seiko Co Ltd
Original Assignee
Koyo Seiko Co 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
Family has litigation
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Application filed by Koyo Seiko Co Ltd filed Critical Koyo Seiko Co Ltd
Priority to JP1133087A priority Critical patent/JP2952672B2/en
Publication of JPH03316A publication Critical patent/JPH03316A/en
Application granted granted Critical
Publication of JP2952672B2 publication Critical patent/JP2952672B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Rolling Contact Bearings (AREA)

Abstract

PURPOSE:To continue to drive a rotor drive device for relatively long period even when oil shortage is produced, by forming at least the rolling element of a bearing unit of a rotor driving device for helicopter of a ceramic, to reduce the weight of the rotor driving device for improving flight performance. CONSTITUTION:In a rotor driving device, a total of 11 roller bearings A to K are used as shown in figure, and at least a rolling element among the parts constituting all these roller bearings A to K is formed of a sintered ceramics consisting mainly of silicon nitride or a ceramics called cyallon. In this way, when at least the rolling element is made of the ceramics among at least all the roller bearings A to K to be used for rotor driving device, a considerable amount of weight can be reduced and the flight performance of a helicopter can be increased. Also, at the weight is reduced, the centrifugal force of the rolling element in operation can be reduced and a slippage under gyroscopic moment can be prevented from being produced to stabilize high-speed rotation of the rotor.

Description

【発明の詳細な説明】[Detailed description of the invention]

〈産業上の利用分野〉 本発明は、ヘリコプタ−の回転翼駆動装置の軸受装置に
関する。 〈従来の技術〉 従来、ヘリコプタ−の回転翼駆動装置においてエンジン
出力軸からロータ軸に至り各種の転がり軸受が多数用い
られている。これらの転がり軸受を構成する各部品は軸
受鋼で形成されており、その潤滑にはほとんどオイルジ
ェット方式またはオイルミスト方式が採用されている。 〈発明が解決しようとする課題〉 ところで、回転翼駆動装置に用いる転がり軸受の各構成
部品は、前述したように軸受鋼製であるため、多くの転
がり軸受を用いる回転翼駆動装置では大重量となってお
り、ヘリコプタ−の飛行操作性の改善が困難になってい
た。また、転がり軸受の潤滑をオイルジェットやオイル
ミスト方式としていたために、回転翼駆動装置が複雑に
なるとともに重量増加の原因にもなっている。 しかも、前記回転翼駆動装置において油切れが生じた場
合には、潤滑されなくなる転がり軸受が油切れから極く
短時間のうちに焼付いてしまい、ヘリコプタ−の墜落な
ど大事故に結びつく危険性が大である。 本発明はこのような事情に鑑みて創案されたもので、回
転翼駆動装置を軽量化して飛行性能を改善させるととも
に、油切れが発生したとしても比較的長時間にわたって
安定的に駆動できるようにして、ヘリコプタ−の滞空時
間を可及的に延ばすことを目的としている。 く課題を解決するための手段〉 本発明は、このような目的を達成するために、次のよう
な構成をとる。 本発明のヘリコプタ−の回転翼駆動装置の軸受装置は、
少なくとも転動体がセラミックスで形成されていること
に特徴を有する。 〈作用〉 上記構成において、セラミックスからなる転動体は、軸
受鋼製の転動体に比べて密度力筒/2−以下であるから
、大幅な重量軽減が図れる。また、この転動体の重量を
軽減できると、運転中の転動体の遠心力軽減につながる
。なお、軌道輪についてもセラミックスとすれば、−m
の重量軽減が図れる。 さらに、セラミックスからなる転動体では、転がり軸受
を無潤滑で運転しても、長時間にわたって焼付きにくい
。 〈実施例〉 以下、本発明の実施例を図面に基づいて詳細に説明する
。 第1図に本発明の一実施例を示してい4.図はヘリコプ
タ−の回転翼駆動装置の断面である。図中、1は入力軸
(エンジン出力軸)、2はロータ用主軸、3はヘリコプ
タ−の付属装置および制御装置に動力を伝える中間軸、
4は作動装置5の出力軸である。 入力軸1は、第1.第2のスリーブ6.7を介してロー
タ用土軸2に連動連結されているとともに、第2.第3
のスリーブ7.8を介して中間軸3に連動連結されてい
る。なお、出力軸4は、エンジン動力(入力軸1の回転
動力)を図示しないロータ(ロータ用主軸2)に伝達す
るか、しないかによって図示する実線位置と、仮想線で
示す位置とのどちらかにスライド変位させられるように
なっている。なお、実線位置ではエンジン動力をロータ
に伝達する状態に、また、仮想線の位置ではエンジン動
力をロータに伝達しないアイドリング状態になる。 具体的には、入力軸1はハウジング9に転がり軸受Aを
介して支持されており、この軸受近傍に傘形歯車10が
取り付けられている。この傘形歯車10は、ハウジング
9に計三つの転がり軸受B−Dを介して支持された第1
のスリーブ6に備える傘形歯車11に噛合されている。 この第1のスリーブ6の内周部には、計画つの転がり軸
受E〜Hおよびフリーホイールクラッチ12を介して第
2のスリーブ7が回動自在にかつ軸方向摺動可能に支持
されている。この第2のスリーブ7の中央内筒部には、
出力軸4の軸端が転がり軸受■を介して取り付けられ、
また、この第2のスリーブ7の一方開口端にはロータ用
土軸2がスプライン嵌合されている。つまり、この第2
のスリーブ7によってロータ用土軸2と主軸4とが同軸
状に配置されている。 そして、中間軸3は、第3のスリーブ8にスプライン嵌
合されており、この第3のスリーブ8が計二つの転がり
軸受J、Kを介してハウジング9に支持されている。こ
の第3のスリーブ8の軸端外周には環状歯車13が一体
形成されており、この環状歯車13に前述の第1のスリ
ーブ6の軸端外周にスプライン嵌合された環状歯車14
が噛合されている。 本実施例とした回転翼駆動装置においては、図示するだ
けでも計11個の転がり軸受A−K(ころ軸受や玉軸受
など)が用いられており、この総ての転がり軸受A−K
を構成する部品のうち少なくとも転動体を、窒化けい素
を主成分とする焼結体であるセラミックス、またはサイ
アロンと称されるセラミックスで形成している。なお、
図示しないが、第1図に示す部分以外での動力伝達系に
おいて用いる転がり軸受について前記と同様に少なくと
も転動体をセラミックスとした構成も本発明に含む。 このように、少なくとも回転翼駆動装置に用いる総ての
転がり軸受A−にの少なくとも転動体をセラミックスと
すると、かなりの重量軽減を実現でき、ひいてはヘリコ
プタ−の飛行性能の向上に貢献できる。また、重量軽減
に伴い運転中の転動体の遠心力を軽減でき、さらに、ジ
ャイロモーメント下での滑りの発生を防止することがで
きるので、高速回転が安定する。しかも、油切れが生じ
ても、油切れから焼付くまでの時間を従来の軸受鋼製の
転がり軸受に比べて大幅に長くできることになり、ヘリ
コプタ−の滞空時間を延ばすことができて、墜落といっ
た大事故を避けることができるようになる。この無潤滑
条件下での寿命は、下記の表に示す実験結果で明確にす
る。ところで、セラミックスを用いた転がり軸受による
と、従来の軸受鋼製の転がり軸受でのオイル潤滑方式に
変えて、グリース潤滑といった簡単な方式に変更するこ
とができ、このことでも装置の簡略化および一層の重量
軽減を実現できるようになる。
<Industrial Application Field> The present invention relates to a bearing device for a rotor blade drive device of a helicopter. <Prior Art> Conventionally, a large number of various rolling bearings have been used from the engine output shaft to the rotor shaft in a rotor blade drive device of a helicopter. Each of the parts that make up these rolling bearings is made of bearing steel, and oil jet or oil mist methods are mostly used for lubrication. <Problems to be Solved by the Invention> By the way, as mentioned above, each component of the rolling bearing used in the rotary blade drive device is made of bearing steel. This made it difficult to improve the flight maneuverability of helicopters. Furthermore, since the rolling bearings are lubricated by an oil jet or oil mist method, the rotary blade drive device becomes complicated and causes an increase in weight. Furthermore, if oil runs out in the rotary blade drive unit, the rolling bearings, which are no longer lubricated, will seize up within a very short time after the oil runs out, and there is a high risk that this will lead to a serious accident such as a helicopter crash. It is. The present invention was devised in view of these circumstances, and it not only reduces the weight of the rotary blade drive device to improve flight performance, but also enables stable drive for a relatively long period of time even if oil runs out. The aim is to extend the helicopter's flight time as much as possible. Means for Solving the Problems> In order to achieve the above objects, the present invention has the following configuration. The bearing device of the rotor blade drive device of a helicopter of the present invention includes:
It is characterized in that at least the rolling elements are made of ceramics. <Function> In the above configuration, since the rolling element made of ceramic has a density of less than 2/2- compared to the rolling element made of bearing steel, a significant weight reduction can be achieved. Furthermore, if the weight of the rolling elements can be reduced, the centrifugal force of the rolling elements during operation can be reduced. In addition, if the bearing ring is also made of ceramics, -m
The weight can be reduced. Furthermore, rolling elements made of ceramics are less likely to seize over a long period of time even when the rolling bearing is operated without lubrication. <Example> Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 shows an embodiment of the present invention.4. The figure shows a cross section of a rotor blade drive system for a helicopter. In the figure, 1 is the input shaft (engine output shaft), 2 is the rotor main shaft, 3 is the intermediate shaft that transmits power to the helicopter's accessories and control device,
4 is an output shaft of the actuating device 5. The input shaft 1 has a first. The second sleeve 6.7 is interlocked with the rotor shaft 2 via the second sleeve 6.7. Third
is operatively connected to the intermediate shaft 3 via a sleeve 7.8. Note that the output shaft 4 can be placed either in the solid line position shown in the figure or in the imaginary line position depending on whether or not the engine power (rotational power of the input shaft 1) is transmitted to the rotor (rotor main shaft 2) not shown. It is designed so that it can be slid and displaced. Note that at the solid line position, the engine power is transmitted to the rotor, and at the virtual line position, the engine power is not transmitted to the rotor, which is the idling state. Specifically, the input shaft 1 is supported by a housing 9 via a rolling bearing A, and a bevel gear 10 is attached near the bearing. This bevel gear 10 is a first gear supported by a housing 9 via a total of three rolling bearings B-D.
It is meshed with a bevel gear 11 provided in the sleeve 6. A second sleeve 7 is rotatably and axially slidably supported on the inner periphery of the first sleeve 6 via a pair of rolling bearings E to H and a freewheel clutch 12 . In the central inner cylinder part of this second sleeve 7,
The shaft end of the output shaft 4 is attached via a rolling bearing ■,
Further, the rotor shaft 2 is spline-fitted to one open end of the second sleeve 7. In other words, this second
The rotor shaft 2 and the main shaft 4 are arranged coaxially by the sleeve 7 . The intermediate shaft 3 is spline-fitted to a third sleeve 8, and the third sleeve 8 is supported by the housing 9 via a total of two rolling bearings J and K. An annular gear 13 is integrally formed on the outer periphery of the shaft end of the third sleeve 8, and an annular gear 14 is spline-fitted to the annular gear 13 on the outer periphery of the shaft end of the first sleeve 6.
are engaged. In the rotary blade drive device according to this embodiment, a total of 11 rolling bearings A-K (roller bearings, ball bearings, etc.) are used, even if only shown in the figure.
At least the rolling elements of the parts constituting the motor are made of ceramic, which is a sintered body containing silicon nitride as a main component, or a ceramic called sialon. In addition,
Although not shown, the present invention also includes a structure in which at least the rolling elements of rolling bearings used in the power transmission system other than those shown in FIG. 1 are made of ceramics, as described above. In this way, if at least the rolling elements of all the rolling bearings A- used in the rotary blade drive device are made of ceramic, a considerable weight reduction can be achieved, which in turn can contribute to improving the flight performance of the helicopter. Furthermore, as the weight is reduced, the centrifugal force of the rolling elements during operation can be reduced, and furthermore, the occurrence of slippage under the gyro moment can be prevented, resulting in stable high-speed rotation. What's more, even if oil runs out, the time from oil running out to seizing can be significantly lengthened compared to conventional bearing steel rolling bearings, extending the flight time of helicopters and preventing crashes. Major accidents can be avoided. The lifespan under this non-lubricated condition is clarified by the experimental results shown in the table below. By the way, with rolling bearings using ceramics, it is possible to replace the oil lubrication method of conventional steel rolling bearings with a simple method such as grease lubrication, which also simplifies and further improves equipment. weight reduction can be realized.

【表】【table】

これは、三種類の転がり軸受について、潤滑が遮断され
てから焼付くまでの寿命をそれぞれ表している。なお、
軸受型番はACTO18,回転数は10.00Or p
 mとして、実験を4回行った。 上記の表に示すように、従来の軸受鋼製の転がり軸受に
比べて転動体のみセラミックスとした転がり軸受および
転動体、軌道輪の総てをセラミックスとした転がり軸受
のいずれにおいても、10倍以上となる。 〈発明の効果〉 以上説明したように、本発明では、転動体をセラミック
スとして転がり軸受の重量軽減を図ったから、装置全体
の大幅な軽量化を実現することができ、ヘリコプタ−の
飛行操作性を改善できるようになった。また、転動体の
重量軽減によって運転中の転動体の遠心力を軽減できる
ので、高速回転が安定になる。 しかも、セラミックスからなる転動体を用いた転がり軸
受は、無潤滑で運転しても長時間にわたって焼付きにく
いので、油切れとなった時点から焼付くまでの時間を従
来よりも延ばすことができ、したがって、ヘリコプタ−
の滞空時間を延ばせて墜落といった事故を避けることが
できるようになる。
This represents the lifespan of three types of rolling bearings from when lubrication is cut off to when they seize. In addition,
Bearing model number is ACTO18, rotation speed is 10.00Orp
The experiment was conducted four times with m. As shown in the table above, compared to conventional rolling bearings made of steel, both rolling bearings in which only the rolling elements are made of ceramics and rolling bearings in which all the rolling elements and raceways are made of ceramics are more than 10 times more effective. becomes. <Effects of the Invention> As explained above, in the present invention, since the rolling elements are made of ceramic to reduce the weight of the rolling bearing, the weight of the entire device can be significantly reduced, and the flight operability of the helicopter can be improved. Now it can be improved. Furthermore, by reducing the weight of the rolling elements, the centrifugal force of the rolling elements during operation can be reduced, resulting in stable high-speed rotation. Moreover, rolling bearings that use rolling elements made of ceramics are resistant to seizing for long periods of time even when operated without lubrication, so the time from the point when the oil runs out to when seizing occurs can be extended compared to conventional bearings. Therefore, the helicopter
This will allow aircraft to stay in the air longer and avoid accidents such as crashes.

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

第1図は本発明の一実施例にかかるヘリコプタ−の回転
KM動装置の軸受装置を示す断面図である。 ■・・・入力軸、  2・・・ロータ用主軸、3・・・
中間軸、  4・・・作動装置の出力軸、A−K・・・
転がり軸受。
FIG. 1 is a sectional view showing a bearing device of a rotary KM drive device for a helicopter according to an embodiment of the present invention. ■...Input shaft, 2...Rotor main shaft, 3...
Intermediate shaft, 4... Output shaft of actuating device, A-K...
Rolling bearing.

Claims (1)

【特許請求の範囲】[Claims] (1)ヘリコプターの回転翼駆動装置に用いられる転が
り軸受の少なくとも転動体がセラミックスで形成されて
いることを特徴とするヘリコプターの回転翼駆動装置の
軸受装置。
(1) A bearing device for a rotary blade drive device of a helicopter, characterized in that at least the rolling elements of the rolling bearing used in the rotary blade drive device of a helicopter are formed of ceramics.
JP1133087A 1989-05-26 1989-05-26 Helicopter rotary wing drive bearing device Expired - Lifetime JP2952672B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1133087A JP2952672B2 (en) 1989-05-26 1989-05-26 Helicopter rotary wing drive bearing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1133087A JP2952672B2 (en) 1989-05-26 1989-05-26 Helicopter rotary wing drive bearing device

Publications (2)

Publication Number Publication Date
JPH03316A true JPH03316A (en) 1991-01-07
JP2952672B2 JP2952672B2 (en) 1999-09-27

Family

ID=15096551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1133087A Expired - Lifetime JP2952672B2 (en) 1989-05-26 1989-05-26 Helicopter rotary wing drive bearing device

Country Status (1)

Country Link
JP (1) JP2952672B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007010144A (en) * 2005-06-30 2007-01-18 Agusta Spa Improved helicopter transmission
JP2007008461A (en) * 2005-06-30 2007-01-18 Agusta Spa Helicopter with an auxiliary lubricating circuit
JP2021502296A (en) * 2017-11-08 2021-01-28 ツェットエフ、フリードリッヒスハーフェン、アクチエンゲゼルシャフトZf Friedrichshafen Ag System that supports rotor shafts

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53131285A (en) * 1977-01-21 1978-11-15 Lab Suise De Reshiyaarushie Ho Precision roller bearing applicable under extreme conditions
JPS6442374A (en) * 1987-08-10 1989-02-14 Ngk Insulators Ltd Oil-impregnated porous ceramic ball

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53131285A (en) * 1977-01-21 1978-11-15 Lab Suise De Reshiyaarushie Ho Precision roller bearing applicable under extreme conditions
JPS6442374A (en) * 1987-08-10 1989-02-14 Ngk Insulators Ltd Oil-impregnated porous ceramic ball

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007010144A (en) * 2005-06-30 2007-01-18 Agusta Spa Improved helicopter transmission
JP2007008461A (en) * 2005-06-30 2007-01-18 Agusta Spa Helicopter with an auxiliary lubricating circuit
JP2021502296A (en) * 2017-11-08 2021-01-28 ツェットエフ、フリードリッヒスハーフェン、アクチエンゲゼルシャフトZf Friedrichshafen Ag System that supports rotor shafts

Also Published As

Publication number Publication date
JP2952672B2 (en) 1999-09-27

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