JPH11325066A - Kinetic energy absorbing device for rotor - Google Patents
Kinetic energy absorbing device for rotorInfo
- Publication number
- JPH11325066A JPH11325066A JP10128703A JP12870398A JPH11325066A JP H11325066 A JPH11325066 A JP H11325066A JP 10128703 A JP10128703 A JP 10128703A JP 12870398 A JP12870398 A JP 12870398A JP H11325066 A JPH11325066 A JP H11325066A
- Authority
- JP
- Japan
- Prior art keywords
- ring member
- inner ring
- rotating body
- kinetic energy
- rotor
- 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
Links
Classifications
-
- 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
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
- F16C2360/45—Turbo-molecular pumps
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、回転体が破損した
場合に、その回転体の運動エネルギーを吸収して事故の
拡大を防止する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing the spread of an accident by absorbing the kinetic energy of a rotating body when the rotating body is damaged.
【０００２】[0002]
【従来の技術】タービンブレードやターボポンプのロー
タ等の回転体は、一般に磁気軸受等により支承され、非
常に高速で回転する。また、かかる回転体を有する装置
は外側にケースを有しており、回転体は当該ケースによ
り覆われている。しかし、高速で回転するロータが、回
転中に何らかの原因で破損した場合には、高速回転によ
ってロータが一気に全壊に至り、破片が飛び散る。飛び
散った破片は、装置の軸端側の、ケースで覆われていな
い部分から飛び出る。従って、これらの飛散破片により
周辺の装置が損傷を被ることがあった。このような問題
点を解決するものとして、実開平６−４３９２号公報に
よれば、ロータの上部と下部との間に分断溝を設け、下
部から生じた破損を上部に波及させないロータ構造を有
するターボ分子ポンプが開示されている。このようなロ
ータ構造によれば、ロータの破損を半壊で食い止めて、
飛散する破片の量を低減することができる。2. Description of the Related Art Rotating members such as turbine blades and rotors of turbo pumps are generally supported by magnetic bearings and rotate at very high speed. The device having such a rotating body has a case on the outside, and the rotating body is covered by the case. However, if the rotor rotating at high speed is damaged during rotation for some reason, the rotor is completely destroyed at a stretch by high speed rotation, and fragments are scattered. The splattered fragments fly out of the shaft end of the device, which is not covered by the case. Therefore, the peripheral devices may be damaged by these flying debris. To solve such a problem, Japanese Utility Model Laid-Open No. 6-4392 discloses a rotor structure in which a dividing groove is provided between an upper portion and a lower portion of a rotor to prevent damage caused from the lower portion from spreading to the upper portion. A turbo molecular pump is disclosed. According to such a rotor structure, damage to the rotor is prevented by half-breaking,
The amount of scattered fragments can be reduced.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記公
報に記載されたロータ構造によって破損の程度を半壊に
食い止めたとしても、高速回転するロータの破損により
大きな運動エネルギーを有したまま飛散した破片が、ロ
ータを覆うケースに衝突してこれを破壊することがあ
る。この場合、装置の周囲にロータの破片が飛び出し
て、大きな事故を招くという問題点があった。However, even if the degree of damage is reduced to half by the rotor structure described in the above-mentioned publication, the debris scattered while having a large kinetic energy due to the damage of the rotor rotating at high speed, It may collide with and destroy the case that covers the rotor. In this case, there is a problem that fragments of the rotor fly out around the device, which causes a serious accident.
【０００４】上記のような従来の問題点に鑑み、本発明
は、回転体の保有する運動エネルギーを安全に吸収する
運動エネルギー吸収装置を提供することを目的とする。[0004] In view of the above-mentioned conventional problems, an object of the present invention is to provide a kinetic energy absorbing device that safely absorbs kinetic energy held by a rotating body.
【０００５】[0005]
【課題を解決するための手段】本発明の回転体の運動エ
ネルギー吸収装置は、軸支されて回転する回転体の外周
に沿って、当該回転体との間に間隙を有して配設された
内輪部材と、前記内輪部材の外周面に転がり接触する転
動体と、前記転動体を前記内輪部材との間に保持するこ
とにより前記内輪部材を回転自在に支持する外輪部材と
を備え、前記内輪部材は、前記回転体が回転中に破損し
たとき、回転体又は回転体の破片に衝突されて当該回転
体の回転方向に回転することを特徴とするものである
（請求項１）。上記のように構成された回転体の運動エ
ネルギー吸収装置において、回転体が回転中に破損した
とき、回転体又はその破片は、ラジアル方向への遠心力
と接線方向への回転速度との合成方向に飛散する。飛散
した破片等は内輪部材に衝突し、内輪部材はこれによっ
て回転体の回転方向と同じ方向に回転する。従って、飛
散した破片等の保有していた運動エネルギーは、その一
部が内輪部材の回転という運動エネルギーに置き換わる
ことにより吸収される。さらに、内輪部材の運動エネル
ギーが転動体と内外輪部材との摩擦により熱エネルギー
として消耗された後、内輪部材は停止する。A kinetic energy absorbing device for a rotating body according to the present invention is disposed along the outer periphery of a rotating body that is supported by a shaft and with a gap between the rotating body and the rotating body. An inner ring member, a rolling element that is in rolling contact with the outer peripheral surface of the inner ring member, and an outer ring member that rotatably supports the inner ring member by holding the rolling element between the inner ring member, The inner ring member is characterized in that, when the rotating body is broken during rotation, the inner ring member is rotated in the rotating direction of the rotating body by colliding with the rotating body or a debris of the rotating body (claim 1). In the kinetic energy absorbing device for a rotating body configured as described above, when the rotating body is broken during rotation, the rotating body or a piece thereof is combined with the centrifugal force in the radial direction and the rotational speed in the tangential direction. Splatters. The scattered debris and the like collides with the inner ring member, whereby the inner ring member rotates in the same direction as the rotation direction of the rotating body. Therefore, the kinetic energy held by the scattered fragments and the like is absorbed by partially replacing the kinetic energy of the rotation of the inner ring member. Further, after the kinetic energy of the inner race member is consumed as thermal energy by friction between the rolling element and the inner and outer race members, the inner race member stops.
【０００６】上記運動エネルギー吸収装置（請求項１）
において、前記内輪及び外輪の一方に前記転動体を案内
する軌道が設けられ、この軌道の硬度がＨＲＣ３０〜４
５であってもよい（請求項２）。この場合、軌道の硬度
（ＨＲＣ３０〜４５）は、一般に軸受の軌道輪の硬度と
して採用されている値に比べて低い。従って、軌道面が
比較的柔らかく、そのため、飛散した破片等の衝突によ
る衝撃荷重により軌道が塑性変形する。これにより転動
体との摩擦抵抗が増大し、運動エネルギー吸収効率が高
くなる。The above kinetic energy absorbing device (Claim 1)
, A track for guiding the rolling element is provided on one of the inner ring and the outer ring, and the hardness of the track is HRC30-4.
5 (claim 2). In this case, the hardness of the raceway (HRC 30 to 45) is lower than the value generally adopted as the hardness of the raceway of the bearing. Therefore, the raceway surface is relatively soft, so that the raceway is plastically deformed by an impact load caused by collision of the scattered fragments or the like. Thereby, the frictional resistance with the rolling elements increases, and the kinetic energy absorption efficiency increases.
【０００７】上記運動エネルギー吸収装置（請求項２）
において、前記内輪部材及び外輪部材の硬度が共にＨＲ
Ｃ３０〜４５であってもよい（請求項３）。この場合、
内輪部材及び外輪部材の硬度が、一般に軸受の内外輪の
硬度として採用されている値に比べて低い値であり、比
較的柔らかい。従って、内外輪部材は、衝撃荷重に対し
ても、割れを生じない。[0007] The kinetic energy absorbing device (Claim 2)
The hardness of both the inner ring member and the outer ring member is HR
It may be C30 to 45 (claim 3). in this case,
The hardness of the inner ring member and the outer ring member is lower than the value generally adopted as the hardness of the inner and outer rings of the bearing, and is relatively soft. Therefore, the inner and outer ring members do not crack even under an impact load.
【０００８】上記運動エネルギー吸収装置（請求項１）
において、前記転動体はその移動方向にほぼ隙間無く装
填されていてもよい（請求項４）。この場合、運動エネ
ルギー吸収装置は、いわば総玉軸受状の構成となり、高
い耐荷重性を発揮する。[0008] The kinetic energy absorbing device (Claim 1)
In the above aspect, the rolling element may be loaded with almost no gap in the moving direction (claim 4). In this case, the kinetic energy absorbing device has a so-called all-ball bearing configuration, and exhibits high load resistance.
【０００９】[0009]
【発明の実施の形態】図１は、本発明の一実施形態によ
る回転体の運動エネルギー吸収装置を示す断面図、図２
は図１のII−II線断面図である。図１及び図２におい
て、回転体１は図示しない磁気軸受等によって図２の時
計回り方向又はその逆方向に回転自在に軸支されてい
る。回転体とは、例えば、ターボ分子ポンプにおけるロ
ータ、タービンブレード、又はスピンドル装置の主軸等
であり、非常に高速に回転する。FIG. 1 is a sectional view showing a kinetic energy absorbing device for a rotating body according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line II-II of FIG. 1. 1 and 2, the rotating body 1 is rotatably supported in a clockwise direction in FIG. 2 or in a direction opposite thereto by a magnetic bearing or the like (not shown). The rotating body is, for example, a rotor in a turbo molecular pump, a turbine blade, or a main shaft of a spindle device, and rotates at a very high speed.
【００１０】運動エネルギー吸収装置２は、回転体１の
外周に沿って、当該回転体１との間に一定の間隙を有し
て配設された円筒状の内輪部材３と、内輪部材３の外周
面に形成された軌道（２０〜３０％Ｂｄ（玉直径））３
ａに転がり摩擦で接触する転動体（玉）４と、転動体４
を内輪部材３との間に保持することにより内輪部材３を
図２の時計回り方向又はその逆方向に回転自在に支持す
る円筒状の外輪部材５とによって構成されている。外輪
部材５は、図示しない構造物の静止部に固定される。な
お、転動体４の軌道３ａは内輪部材３にのみ軸方向に所
定間隔で複数条設けられており、外輪部材５の内面は、
軌道を有しない円筒状内面である。転動体４を内輪部材
３と外輪部材５とによって挟持した状態で、外輪部材５
の上端外周側の数箇所からピン６が打ち込まれる。打ち
込まれたピン６の先端は、内輪部材３の上端外周側に穿
設されたピン孔３ｂに挿入されている。従って、当該ピ
ン６により、内輪部材３と外輪部材５とは軸方向に互い
に分離しない構造となっている。なお、ピン６の位置
は、上記の場所以外に、軸方向中央部等、転動体４の移
動の妨げとならない場所であればどこでもよい。転動体
４は、図２に示すように周方向にほぼ隙間なく装填さ
れ、いわば総玉軸受状の構成を成している。従って、当
該運動エネルギー吸収装置２は高い耐荷重性を発揮す
る。なお、転動体間の隙間が全くないと転動体４の転動
ができないので、周方向に少なくとも転動体１個分以上
で、角度にして３０度以下の範囲の隙間を設けることが
必要である。The kinetic energy absorbing device 2 includes a cylindrical inner ring member 3 disposed along the outer periphery of the rotating body 1 with a certain gap between the rotating body 1 and the inner ring member 3. Orbit (20-30% Bd (ball diameter)) 3 formed on the outer peripheral surface
a rolling element (ball) 4 which comes into contact with a by rolling friction;
2 is held between the outer ring member 3 and the inner ring member 3 to thereby rotatably support the inner ring member 3 in the clockwise direction in FIG. The outer ring member 5 is fixed to a stationary portion of a structure (not shown). Note that a plurality of tracks 3a of the rolling elements 4 are provided at predetermined intervals in the axial direction only on the inner ring member 3, and the inner surface of the outer ring member 5
It is a cylindrical inner surface without a track. In a state where the rolling element 4 is sandwiched between the inner race member 3 and the outer race member 5, the outer race member 5
The pins 6 are driven in from several places on the outer peripheral side of the upper end. The tip of the driven pin 6 is inserted into a pin hole 3 b drilled on the outer peripheral side of the upper end of the inner ring member 3. Therefore, the inner ring member 3 and the outer ring member 5 are not separated from each other in the axial direction by the pins 6. In addition, the position of the pin 6 may be any location other than the above location, such as the central portion in the axial direction, as long as the location does not hinder the movement of the rolling element 4. As shown in FIG. 2, the rolling elements 4 are loaded in the circumferential direction with almost no gap, and have a so-called all-ball bearing configuration. Therefore, the kinetic energy absorbing device 2 exhibits high load resistance. Since the rolling elements 4 cannot be rolled without any gaps between the rolling elements, it is necessary to provide a gap in the circumferential direction of at least one rolling element and an angle of 30 degrees or less. .
【００１１】上記運動エネルギー吸収装置２は、回転体
１を覆うケースの役割を兼ねている。内輪部材３、転動
体４及び外輪部材５には、軸受に用いられる材料と同様
のステンレス鋼や高炭素クロム軸受鋼が用いられる。硬
度は、内輪部材３及び外輪部材５がＨＲＣ３０〜４５で
あり、転動体４はＨＲＣ６０以上である。内輪部材３及
び外輪部材５についての硬度（ＨＲＣ３０〜４５）は、
軸受の内外輪に一般に採用される硬度より低く、従って
比較的柔らかい。硬度が低いことは変形し易いことであ
るとともに、衝撃荷重に対しては割れにくくなることを
意味する。内輪部材３及び外輪部材５の全面にはＭｏＳ
２コーティングが施され、個体潤滑と防錆とが図られて
いる。The kinetic energy absorbing device 2 also functions as a case that covers the rotating body 1. For the inner ring member 3, the rolling elements 4, and the outer ring member 5, the same stainless steel or high carbon chromium bearing steel as the material used for the bearing is used. The hardness of the inner ring member 3 and the outer ring member 5 is HRC 30 to 45, and the hardness of the rolling elements 4 is HRC 60 or more. The hardness (HRC30 to 45) of the inner ring member 3 and the outer ring member 5 is
It is lower than the hardness generally adopted for the inner and outer rings of the bearing, and is therefore relatively soft. Low hardness means that it is easily deformed and hardly cracks under an impact load. The entire surface of the inner ring member 3 and the outer ring member 5 has Mo S
Two coatings are applied to achieve solid lubrication and rust prevention.
【００１２】次に、上記のように構成された回転体の運
動エネルギー吸収装置２の動作について図３を参照して
説明する。図３は図２と同様の断面図であるが、回転体
１が反時計回り方向に高速回転中に破損した状態を示し
ている。回転体１が高速回転中に破損すると、ラジアル
方向への遠心力と接線方向への回転速度との合成方向
（図中の矢印Ａ参照）に破片が飛散する。飛散した破片
が内輪部材３に衝突することにより、内輪部材３は反時
計回り方向、すなわち回転体１の回転方向に駆動され、
回転する。このとき、破片の保有する運動エネルギー
は、その一部が内輪部材３の回転エネルギーに置き換わ
ることによって、内輪部材３に吸収される。この結果、
破片の運動エネルギーは減少し、飛散速度は減速され
る。従って、内輪部材３が破片によって破壊されること
もない。また、転動体４が隙間無く装填された総玉軸受
状の構成により、装置全体の破損がさらに確実に防止さ
れている。Next, the operation of the kinetic energy absorbing device 2 for a rotating body configured as described above will be described with reference to FIG. FIG. 3 is a cross-sectional view similar to FIG. 2, but showing a state in which the rotating body 1 is damaged during high-speed rotation in a counterclockwise direction. If the rotating body 1 breaks during high-speed rotation, fragments are scattered in a direction in which the centrifugal force in the radial direction and the rotational speed in the tangential direction are combined (see the arrow A in the figure). When the scattered debris collides with the inner race member 3, the inner race member 3 is driven in a counterclockwise direction, that is, in the rotation direction of the rotating body 1, and
Rotate. At this time, a part of the kinetic energy held by the fragments is replaced by the rotational energy of the inner ring member 3 and is absorbed by the inner ring member 3. As a result,
The kinetic energy of the debris is reduced and the flying speed is reduced. Therefore, the inner ring member 3 is not broken by the fragments. Further, with the configuration of a full ball bearing in which the rolling elements 4 are loaded without gaps, damage to the entire apparatus is more reliably prevented.
【００１３】なお、内輪部材３は破片の衝突時の衝撃荷
重を直接に受け、また、外輪部材５も転動体４を介して
衝撃荷重を受けるが、共に硬度が比較的柔らかいことに
より、割れを生じることがない。一方、破片の衝突の際
の衝撃荷重によって内輪部材３の軌道３ａが若干の塑性
変形を生じる。内輪部材３の回転に伴って、転動体４が
回転しながら移動する。ここで、転動体４は、上記のよ
うに塑性変形を生じた軌道３ａ上を移動する。従って、
摩擦抵抗が大きく、転動体４の運動エネルギーは急速に
熱エネルギーに変わる。また、転動体４同士がほぼ隙間
無く装填されているので、互いに干渉し合って、摩擦に
より運動エネルギーが消費される。さらに、転動体４と
外輪部材５との摩擦によっても運動エネルギーが消費さ
れる。こうして、内輪部材３の回転エネルギーは、摩擦
による熱エネルギーに変わることで安全に吸収され、回
転する内輪部材３にはブレーキがかかる。なお、上記の
ように回転体１が分解して飛散した場合の他に、回転体
１全体がこれを支持する軸受等から外れてしまった場合
などにも、回転体１全体を内輪部材３によって受け止め
ることができ、装置全体の破損を防止することができ
る。The inner ring member 3 directly receives the impact load at the time of the collision of the debris, and the outer ring member 5 also receives the impact load via the rolling elements 4. Will not occur. On the other hand, the track 3a of the inner race member 3 is slightly plastically deformed by the impact load at the time of the collision of the fragments. The rolling element 4 moves while rotating with the rotation of the inner ring member 3. Here, the rolling element 4 moves on the track 3a in which the plastic deformation has occurred as described above. Therefore,
The frictional resistance is large, and the kinetic energy of the rolling elements 4 rapidly changes to heat energy. Further, since the rolling elements 4 are loaded with almost no gap, they interfere with each other, and kinetic energy is consumed by friction. Further, kinetic energy is also consumed by friction between the rolling element 4 and the outer ring member 5. Thus, the rotational energy of the inner ring member 3 is safely absorbed by being converted into thermal energy due to friction, and the rotating inner ring member 3 is braked. In addition to the case where the rotating body 1 is disassembled and scattered as described above, even when the entire rotating body 1 is detached from a bearing or the like that supports the rotating body 1, the entire rotating body 1 is controlled by the inner ring member 3. Thus, the entire device can be prevented from being damaged.
【００１４】なお、上記実施形態においては、内輪部材
３及び外輪部材５の硬度を、軸受に用いられる硬度より
低くしたが、硬度を低くするのは内輪部材３及び外輪部
材５のいずれか一方でも良い。しかしながら、衝撃荷重
を直接受ける内輪部材３の硬度を低くすることが望まし
い。また、上記実施形態において軌道３ａは内輪部材３
に設けたが、外輪部材５の内周面に設けてもよい。但
し、何れの場合でも、軌道を設ける側の部材の硬度を低
くするか若しくは軌道周辺部分のみの硬度を低くして、
軌道の塑性変形を生じさせることが必要である。なお、
内輪部材３及び外輪部材５の双方に軌道を設けることは
できない。組立が不可能になるからである。なお、内輪
部材３及び外輪部材５の硬度を必ずしも低くすることな
く、近似した効果を得ることも可能である。例えば、内
輪部材３の内周面に衝撃吸収部材を被着し、内輪部材３
に直接ブレーキ手段を圧接する構成も可能である。ま
た、エネルギー吸収装置２の寸法は、回転体１の大きさ
に合わせて任意に構成することが可能であり、回転体１
の軸方向に複数個設けてもよい。In the above embodiment, the hardness of the inner ring member 3 and the outer ring member 5 is set lower than the hardness used for the bearing. However, the hardness is reduced by either the inner ring member 3 or the outer ring member 5. good. However, it is desirable to lower the hardness of the inner ring member 3 which directly receives the impact load. In the above embodiment, the track 3a is the inner race member 3
However, it may be provided on the inner peripheral surface of the outer ring member 5. However, in any case, the hardness of the member on which the track is provided is reduced or the hardness of only the periphery of the track is reduced.
It is necessary to cause plastic deformation of the track. In addition,
A track cannot be provided on both the inner ring member 3 and the outer ring member 5. This is because assembly becomes impossible. In addition, it is also possible to obtain an approximate effect without necessarily lowering the hardness of the inner ring member 3 and the outer ring member 5. For example, a shock absorbing member is attached to the inner peripheral surface of the inner race member 3 and the inner race member 3
A configuration in which the brake means is directly pressed into contact with the shaft is also possible. The size of the energy absorbing device 2 can be arbitrarily set according to the size of the rotating body 1.
May be provided in the axial direction.
【００１５】[0015]
【発明の効果】以上のように構成された本発明は以下の
効果を奏する。請求項１の回転体の運動エネルギー吸収
装置によれば、回転体が回転中に破損したとき、回転体
又はその破片は、ラジアル方向への遠心力と接線方向へ
の回転速度との合成方向に飛散して内輪部材に衝突し、
内輪部材はこれによって回転体の回転方向と同じ方向に
回転するので、飛散した破片等の保有していた運動エネ
ルギーは、その一部が内輪部材の回転という運動エネル
ギーに置き換わることにより吸収される。さらに、内輪
部材の運動エネルギーが転動体と内外輪部材との摩擦に
より熱エネルギーとして消耗される。従って、ケースの
破壊等を招くことなく、回転体の運動エネルギーを安全
に吸収することができる。The present invention configured as described above has the following effects. According to the kinetic energy absorbing device for a rotating body according to claim 1, when the rotating body is broken during rotation, the rotating body or a fragment thereof rotates in a direction in which the centrifugal force in the radial direction and the rotational speed in the tangential direction are combined. Scattered and collided with the inner ring member,
As a result, the inner ring member rotates in the same direction as the rotation direction of the rotating body, so that the kinetic energy held by the scattered debris and the like is absorbed by partially replacing the kinetic energy of the rotation of the inner ring member. Further, the kinetic energy of the inner race member is consumed as thermal energy due to friction between the rolling elements and the inner and outer race members. Therefore, the kinetic energy of the rotating body can be safely absorbed without causing the case to be broken.
【００１６】請求項２の回転体の運動エネルギー吸収装
置によれば、軌道の硬度（ＨＲＣ３０〜４５）は、一般
に軸受の軌道輪の硬度として採用されている値に比べて
低いので、軌道面が比較的柔らかく、そのため、飛散し
た破片等の衝突による衝撃荷重により軌道が塑性変形を
生じる。これにより転動体と軌道との摩擦抵抗が増大
し、運動エネルギー吸収効率が高くなる。According to the kinetic energy absorbing device for a rotating body of the second aspect, the hardness of the raceway (HRC 30 to 45) is lower than the value generally adopted as the hardness of the raceway of the bearing. The track is relatively soft, so that the track undergoes plastic deformation due to the impact load caused by the collision of the scattered fragments and the like. As a result, the frictional resistance between the rolling elements and the orbit increases, and the kinetic energy absorption efficiency increases.
【００１７】請求項３の回転体の運動エネルギー吸収装
置によれば、内輪部材及び外輪部材の硬度が、一般に軸
受の内外輪の硬度として採用されている値に比べて低い
値であり、比較的柔らかいので、当該内外輪部材は衝撃
荷重に対しても割れることなく、安全である。According to the third aspect of the present invention, the hardness of the inner race member and the outer race member is lower than the value generally adopted as the hardness of the inner and outer races of the bearing. Since it is soft, the inner and outer ring members are safe without cracking even under an impact load.
【００１８】請求項４の回転体の運動エネルギー吸収装
置によれば、当該装置はいわば総玉軸受状の構成とな
り、高い耐荷重性を発揮するので、衝撃荷重に対しても
破損しない。According to the kinetic energy absorbing device for a rotating body according to the fourth aspect, the device has a so-called full ball bearing configuration and exhibits high load resistance, so that it is not damaged by an impact load.
【図１】本発明の一実施形態による回転体の運動エネル
ギー吸収装置を示す断面図である。FIG. 1 is a cross-sectional view illustrating a kinetic energy absorbing device for a rotating body according to an embodiment of the present invention.
【図２】図１のII−II線から見た運動エネルギー吸収装
置の断面図である。FIG. 2 is a cross-sectional view of the kinetic energy absorbing device taken along line II-II in FIG.
【図３】上記運動エネルギー吸収装置において回転体が
破損した状態を示す断面図である。FIG. 3 is a sectional view showing a state in which a rotating body is broken in the kinetic energy absorbing device.
１ 回転体 ２ 運動エネルギー吸収装置 ３ 内輪部材 ３ａ 軌道 ４ 転動体 ５ 外輪部材 DESCRIPTION OF SYMBOLS 1 Rotating body 2 Kinetic energy absorption device 3 Inner ring member 3a Track 4 Rolling member 5 Outer ring member
Claims (4)
て、当該回転体との間に間隙を有して配設された内輪部
材と、 前記内輪部材の外周面に転がり摩擦で接触する転動体
と、 前記転動体を前記内輪部材との間に保持することにより
前記内輪部材を回転自在に支持する外輪部材とを備え、
前記内輪部材は、前記回転体が回転中に破損したとき、
回転体又は回転体の破片に衝突されて当該回転体の回転
方向に回転することを特徴とする回転体の運動エネルギ
ー吸収装置。An inner ring member disposed along the outer periphery of a rotating body that is rotatably supported by a bearing and having a gap between the rotating body and the outer ring surface of the inner ring member by rolling friction. Rolling element, and an outer ring member rotatably supporting the inner ring member by holding the rolling element between the inner ring member,
When the inner ring member is damaged during rotation of the rotating body,
A kinetic energy absorbing device for a rotating body, wherein the rotating body or a piece of the rotating body is impacted to rotate in a rotating direction of the rotating body.
内する軌道が設けられ、この軌道の硬度がＨＲＣ３０〜
４５であることを特徴とする請求項１記載の回転体の運
動エネルギー吸収装置。2. A raceway for guiding the rolling element is provided on one of the inner race and the outer race, and the race has a hardness of HRC 30 to 30.
The kinetic energy absorbing device for a rotating body according to claim 1, wherein the number is 45.
〜４５であることを特徴とする請求項２記載の回転体の
運動エネルギー吸収装置。3. The hardness of both the inner ring and the outer ring is HRC30.
The kinetic energy absorbing device for a rotating body according to claim 2, wherein the number is from 45 to 45.
装填されていることを特徴とする請求項１記載の回転体
の運動エネルギー吸収装置。4. The kinetic energy absorbing device for a rotating body according to claim 1, wherein said rolling element is loaded with substantially no gap in the moving direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12870398A JP4085468B2 (en) | 1998-05-12 | 1998-05-12 | Kinetic energy absorber for rotating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12870398A JP4085468B2 (en) | 1998-05-12 | 1998-05-12 | Kinetic energy absorber for rotating body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11325066A true JPH11325066A (en) | 1999-11-26 |
| JP4085468B2 JP4085468B2 (en) | 2008-05-14 |
Family
ID=14991347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12870398A Expired - Fee Related JP4085468B2 (en) | 1998-05-12 | 1998-05-12 | Kinetic energy absorber for rotating body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4085468B2 (en) |
-
1998
- 1998-05-12 JP JP12870398A patent/JP4085468B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP4085468B2 (en) | 2008-05-14 |
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