JP3129587B2 - Centrifugal low-temperature compressor impeller mounting structure - Google Patents
Centrifugal low-temperature compressor impeller mounting structureInfo
- Publication number
- JP3129587B2 JP3129587B2 JP05229545A JP22954593A JP3129587B2 JP 3129587 B2 JP3129587 B2 JP 3129587B2 JP 05229545 A JP05229545 A JP 05229545A JP 22954593 A JP22954593 A JP 22954593A JP 3129587 B2 JP3129587 B2 JP 3129587B2
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- rotating shaft
- bush
- mounting structure
- centrifugal
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、遠心式低温圧縮機の
インペラ取付構造に関し、高速回転や超高速回転による
遠心力で回転軸から浮き上がることを防止するととも
に、取付けや取外しが容易にできるようにしたものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impeller mounting structure for a centrifugal low-temperature compressor, which prevents floating from a rotating shaft due to centrifugal force caused by high-speed rotation or ultra-high-speed rotation, and facilitates installation and removal. It was made.
【０００２】[0002]
【従来の技術】低温気体の圧縮などに使用される遠心式
低温圧縮機では、駆動源に連結されて駆動される回転軸
にインペラを取付ける必要があり、たとえばインペラの
材質を回転軸より熱膨張率が大きい材質とし、運転時に
インペラが低温状態になると、回転軸に比べて熱収縮量
が多くなることを利用して自動的に締付力が加わる（自
緊）ようにしている。2. Description of the Related Art In a centrifugal low-temperature compressor used for compressing low-temperature gas, it is necessary to mount an impeller on a rotating shaft which is connected to and driven by a driving source. For example, the material of the impeller is thermally expanded from the rotating shaft. When the impeller is in a low temperature state during operation, a tightening force is automatically applied (self-tightening) by utilizing the fact that the amount of heat shrinkage is larger than that of the rotating shaft.
【０００３】また、インペラが高速回転や超高速回転で
運転されると、遠心力によってインペラの回転軸への取
付部分が変形し、インペラが回転軸から浮き上がろうと
するため、図２に組立前後の状態を示すように、回転軸
１に対してインペラ２の取付部の径を小さくして置き、
遠心力によるインペラ２の内周の変形量を上回る締代Ｓ
でインペラ２を回転軸１に焼きばめするようにしてい
る。[0003] When the impeller is operated at a high speed rotation or a very high speed rotation, the mounting portion of the impeller to the rotating shaft is deformed by centrifugal force, and the impeller tends to float up from the rotating shaft. As shown before and after, the diameter of the mounting portion of the impeller 2 with respect to the rotating shaft 1 is set small,
Interference S exceeding the amount of deformation of the inner circumference of impeller 2 due to centrifugal force
To shrink-fit the impeller 2 to the rotating shaft 1.
【０００４】このような遠心式低温圧縮機では、点検の
ためや修理などのため圧縮機を分解しようとすると、回
転軸１からインペラ２を取り外す必要があるが、一旦、
回転軸１にインペラ２を焼きばめした状態では、回転軸
１だけを冷却することが出来ず、インペラ２を加熱して
取り外すようにしなければならない。[0004] In such a centrifugal low-temperature compressor, it is necessary to remove the impeller 2 from the rotating shaft 1 to disassemble the compressor for inspection or repair.
In a state where the impeller 2 is shrink-fitted to the rotating shaft 1, only the rotating shaft 1 cannot be cooled, and the impeller 2 must be heated and removed.
【０００５】[0005]
【発明が解決しようとする課題】ところが、インペラ２
を加熱する場合には、回転軸１も同時に温まってしまう
ので、回転軸１のみを冷却でき、インペラ２のみを加熱
できる組立時に比べて大幅に高い温度まで加熱する必要
がある。However, the impeller 2
Is heated at the same time, the rotating shaft 1 is also heated. Therefore, it is necessary to heat the rotating shaft 1 only, and to heat the impeller 2 to a much higher temperature than at the time of assembly, in which only the impeller 2 can be heated.
【０００６】しかし、加熱温度を高くすると、インペラ
２や圧縮機の他の部分へ熱影響が及ぶことから加熱温度
には自ずから限界があり、これによって回転軸１とイン
ペラ２との間の焼きばめ時の締代Ｓにも限界が生じ、高
速回転よって生じる遠心力による変形を抑えることがで
きず、インペラ２が回転軸１に対して浮き上がってしま
い、安定した状態で運転することができない等の問題が
ある。[0006] However, if the heating temperature is increased, the impeller 2 and other parts of the compressor are affected by heat, so that the heating temperature is naturally limited, and as a result, the firing between the rotary shaft 1 and the impeller 2 is reduced. And the deformation due to the centrifugal force caused by high-speed rotation cannot be suppressed, and the impeller 2 floats up with respect to the rotating shaft 1 and cannot be operated in a stable state. There is a problem.
【０００７】この発明は、かかる従来技術の問題点に鑑
みてなされたもので、高速回転による遠心力で回転軸か
ら浮き上がることを防止でき、取付けや取外しが容易に
できる遠心式低温圧縮機のインペラ取付構造を提供しよ
うとするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to prevent a centrifugal force generated by high-speed rotation from floating from a rotating shaft, and to facilitate installation and removal of a centrifugal low-temperature compressor impeller. It is intended to provide a mounting structure.
【０００８】[0008]
【課題を解決するための手段】上記従来技術が有する課
題を解決するためこの発明の請求項１の遠心式低温圧縮
機のインペラ取付構造は、インペラと回転軸との間に嵌
め込まれるブッシュを当該回転軸と同一熱膨張率を有す
る材質を用いて形成するとともに、その内径を常温で回
転軸との間に隙間無く装着可能に形成し、このブッシュ
の外径部にインペラの運転時に生じる遠心力による変形
を相殺する締代を与えてインペラを焼きばめする一方、
このインペラを前記ブッシュを介して先端部にねじ部を
備えた回転軸に装着しナットで締付けて軸方向の移動を
規制したことを特徴とするものである。According to a first aspect of the present invention, there is provided an impeller mounting structure for a centrifugal low-temperature compressor, comprising a bush fitted between an impeller and a rotary shaft. It is formed using a material having the same coefficient of thermal expansion as the rotating shaft, and its inner diameter is formed so that it can be attached to the rotating shaft at room temperature with no gap. The centrifugal force generated at the outer diameter of this bush during operation of the impeller While shrink-fitting the impeller with a closing allowance to offset the deformation due to
The impeller is mounted on a rotating shaft having a threaded portion at the tip via the bush and tightened with a nut to restrict axial movement.
【０００９】また、この発明の請求項２の遠心式低温圧
縮機のインペラ取付構造は、上記請求項１の構成に加
え、前記インペラの背面に設けられた環状の突起に、イ
ンペラの運転時に生じる遠心力によるインペラ背面の内
径の変形を規制する締代を与えてインペラと同等以上の
熱膨張率を有する材質で形成される背面リングを焼きば
めしたことを特徴とするものである。According to the second aspect of the present invention, in addition to the structure of the first aspect, the impeller mounting structure of the centrifugal low-temperature compressor is formed on the annular projection provided on the back surface of the impeller when the impeller is operated. A rear ring made of a material having a thermal expansion coefficient equal to or higher than that of the impeller is shrink-fitted by giving a margin for restricting deformation of the inner diameter of the rear surface of the impeller due to centrifugal force.
【００１０】[0010]
【作用】請求項１の遠心式低温圧縮機のインペラ取付構
造によれば、インペラに嵌め込むブッシュを回転軸と同
一の熱膨張率の材質とし、このブッシュの外周に遠心力
が加わっても浮き上がらない締代を与えてインペラを焼
きばめするようにしており、ブッシュとインペラとの取
付けを運転時に支障がないようにしている。According to the impeller mounting structure of the centrifugal low-temperature compressor of the first aspect, the bush to be fitted into the impeller is made of a material having the same coefficient of thermal expansion as that of the rotating shaft, and the bushing rises even when a centrifugal force is applied to the outer periphery of the bush. The impeller is shrink-fitted with no interference, so that the bush and the impeller can be securely mounted during operation.
【００１１】また、回転軸にはブッシュを介してインペ
ラを隙間無く取付け、回転軸の先端のねじ部にナットを
締付けて軸方向の移動を規制するようにしており、ブッ
シュと回転軸の等しい熱膨張率によって低温時でも隙間
のない状態で運転でき、加熱や冷却の必要を無くして取
付けや取外しができるようになる。Further, an impeller is mounted on the rotary shaft via a bush without any gap, and a nut is fastened to a screw portion at the tip of the rotary shaft to restrict axial movement. The expansion coefficient allows operation without gaps even at low temperatures, and enables attachment and detachment without the need for heating or cooling.
【００１２】さらに、請求項２の遠心式低温圧縮機のイ
ンペラ取付構造によれば、上記の構成に加え、インペラ
の熱膨張率と同等以上の材質の背面リングを用い、これ
をインペラの運転時に生じる遠心力によるインペラ背面
の内径の変形を規制する締代を与えてインペラの背面に
焼きばめするようにしており、低温時の熱収縮を利用し
て一層確実にインペラの遠心力による浮き上がりを防止
して安定した回転状態で運転できるようにしている。Further, according to the impeller mounting structure of the centrifugal low-temperature compressor of the second aspect, in addition to the above configuration, a back ring made of a material having a coefficient equal to or higher than the thermal expansion coefficient of the impeller is used, and this is used during operation of the impeller. A shrink fit is applied to the back of the impeller by giving a tightening that regulates the deformation of the inner diameter of the back of the impeller due to the generated centrifugal force. This prevents the vehicle from running in a stable rotation state.
【００１３】[0013]
【実施例】以下、この発明の一実施例を図面に基づき詳
細に説明する。図１はこの発明の遠心式低温圧縮機のイ
ンペラ取付構造の一実施例にかかる組立前および組立後
の断面図である。この遠心式低温圧縮機のインペラ取付
構造１０では、駆動回転される回転軸１１に段差１１ａ
が形成されて小径とされたインペラ装着部１１ｂが形成
され、先端部にインペラ装着部１１ｂより小径のねじ部
１２が形成してある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view showing an impeller mounting structure of a centrifugal low-temperature compressor according to one embodiment of the present invention before and after assembly. In the impeller mounting structure 10 of the centrifugal low-temperature compressor, the rotating shaft 11 driven and rotated has a step 11a.
Are formed to form a small-diameter impeller mounting portion 11b, and a screw portion 12 having a smaller diameter than the impeller mounting portion 11b is formed at the tip.
【００１４】この回転軸１１のインペラ装着部１１ｂに
は、ブッシュ１３を介してインペラ１４が取付けられる
ようになっている。An impeller 14 is attached to the impeller mounting portion 11b of the rotating shaft 11 via a bush 13.
【００１５】このブッシュ１３は回転軸１１の熱膨張率
β1 と同一の熱膨張率β2 （＝β1）を有する材質でほ
ぼ円筒状に作られ、内径が組立時に回転軸１１のインペ
ラ装着部１１ｂの外径と隙間のない状態で装着できるよ
うに加工されるとともに、軸方向後端部にインペラ１４
が係止される大径部１３ａが形成されて所定の肉厚を確
保して形成してある。The bush 13 is made of a material having the same thermal expansion coefficient β2 (= β1) as the thermal expansion coefficient β1 of the rotating shaft 11, and has an inner diameter of the impeller mounting portion 11b of the rotating shaft 11 during assembly. It is machined so that it can be installed with no gap between the outer diameter and the impeller 14 at the rear end in the axial direction.
Is formed to secure a predetermined thickness.
【００１６】このブッシュ１３の外径部に取付けられる
インペラ１４は、その取付部の内径がブッシュ１３の外
径より小さくしてあり、この径の差がブッシュ１３に焼
きばめしたときにインペラ１４の運転時に生じる遠心力
による変形を規制する締代Ｓ1 となるようにしてある。The impeller 14 attached to the outer diameter portion of the bush 13 has an inner diameter of the attachment portion smaller than the outer diameter of the bush 13. In order to restrict the deformation due to the centrifugal force that occurs during the operation of S1, the interference S1 is set.
【００１７】そして、ブッシュ１３に焼きばめしたイン
ペラ１４ごと回転軸１１のインペラ装着部１１ｂに装着
して軸方向の移動を回転軸１１の段差１１ａとで締付け
るため回転軸１１のねじ部１２にねじ込むナット１５が
用意してある。The impeller 14 fitted on the bush 13 is mounted on the impeller mounting portion 11b of the rotary shaft 11 and the axial movement is tightened by the step 11a of the rotary shaft 11 with the screw portion 12 of the rotary shaft 11. A nut 15 for screwing is provided.
【００１８】さらに、回転数が高い状態で運転するイン
ペラの場合には、インペラ１４の背面１４ａの運転時に
生じる遠心力による変形に伴う内径の浮き上がりを規制
するため、インペラ１４の背面１４ａの外周に焼きばめ
される背面リング１６が用意してあり、焼きばめによる
締代Ｓ2 によって内径の浮き上がりを防止するととも
に、背面リング１６自体をインペラ１６の熱膨張率β3
と同等以上の熱膨張率β4 （≧β3 ）の材質で作ってあ
る。Further, in the case of an impeller operating at a high rotational speed, the outer periphery of the rear surface 14a of the impeller 14 is restricted in order to prevent the inner diameter from rising due to the centrifugal force generated during the operation of the rear surface 14a of the impeller 14. A rear ring 16 to be shrink-fitted is provided to prevent the inner diameter from rising due to the interference S2 by shrink-fitting, and the rear ring 16 itself is connected to the thermal expansion coefficient β3 of the impeller 16.
It is made of a material with a thermal expansion coefficient β4 (≧ β3) equal to or higher than that of.
【００１９】このような遠心式低温圧縮機のインペラ１
４の回転軸１１への取付けは、次のようにして行われ
る。The impeller 1 of such a centrifugal low-temperature compressor
4 is mounted on the rotating shaft 11 as follows.
【００２０】予め、インペラ１４をブッシュ１３の外径
部に焼きばめするとともに、高速回転で使用されるイン
ペラ１４の場合には、さらに背面リング１６をインペラ
１４の背面１４ａに焼きばめしてこれらを一体にしてお
く。In advance, the impeller 14 is shrink-fitted to the outer diameter portion of the bush 13, and in the case of the impeller 14 used at high speed, the back ring 16 is further shrink-fitted to the back surface 14 a of the impeller 14. Are kept together.
【００２１】このインペラ１４、ブッシュ１３および背
面リング１６が一体とした状態で、回転軸１１のインペ
ラ装着部１１ｂにブッシュ１３の内径部を嵌め込む。With the impeller 14, the bush 13, and the back ring 16 integrated, the inner diameter of the bush 13 is fitted into the impeller mounting portion 11b of the rotating shaft 11.
【００２２】このとき、熱膨張率が等しい回転軸１１の
インペラ装着部１１ｂとブッシュ１４の内径部を組立時
に常温で隙間ができない状態に加工してあるので、簡単
に装着することができる。At this time, the impeller mounting portion 11b of the rotary shaft 11 and the inner diameter portion of the bush 14, which have the same thermal expansion coefficient, are machined so that no gap is formed at room temperature during assembly, so that they can be easily mounted.
【００２３】そして、回転軸１１の先端部のねじ部１２
にナット１５を用い、ブッシュ１３を回転軸１１の段差
１１ａに押し付けるようにし、運転時にも接触面で相対
変位が生じないような締付けトルクで締付ける。Then, the threaded portion 12 at the tip of the rotating shaft 11
The bush 13 is pressed against the step 11a of the rotating shaft 11 by using a nut 15, and is tightened with a tightening torque that does not cause relative displacement on the contact surface even during operation.
【００２４】こうしてインペラ１４をブッシュ１３を介
して回転軸１１に取付けることで、確実に支持すること
ができる。By attaching the impeller 14 to the rotating shaft 11 via the bush 13 in this manner, it is possible to reliably support the impeller 14.
【００２５】このような遠心式低温圧縮機のインペラ取
付構造１０によれば、インペラ１４が接する低温流体の
温度が回転軸１１の温度より低くなる場合でも、回転軸
１１とブッシュ１３とが同一熱膨張率（β1 ＝β2 ）を
有する材質であるので、、軸方向の相対変位が小さく、
ナット１５による締付けトルクを予め増やしておくこと
によってインペラ１４を確実にブッシュ１３を介して回
転軸１１に取付けることができる。According to the impeller mounting structure 10 of the centrifugal low-temperature compressor, even when the temperature of the low-temperature fluid in contact with the impeller 14 is lower than the temperature of the rotary shaft 11, the rotary shaft 11 and the bush 13 have the same heat. Since the material has an expansion coefficient (β1 = β2), the relative displacement in the axial direction is small,
By increasing the tightening torque of the nut 15 in advance, the impeller 14 can be securely attached to the rotating shaft 11 via the bush 13.
【００２６】また、インペラ１４が接する気体の温度が
インペラ１４の組立時の温度より低くなる場合でも、背
面リング１６がインペラ１４と同等以上の熱膨張率（β
4 ≧β3 ）を有する材質であるので、締代が増加し、運
転中のインペラ１４の背面１４ａの内径の浮き上がりを
防止することができる。Further, even when the temperature of the gas in contact with the impeller 14 becomes lower than the temperature at the time of assembling the impeller 14, the rear ring 16 has a thermal expansion coefficient (β
4 ≧ β3), the interference is increased, and it is possible to prevent the inner diameter of the rear surface 14a of the impeller 14 from rising during operation.
【００２７】一方、組み立てた状態のインペラ１４を回
転軸１１から取り外す場合には、回転軸１１の先端部の
ナット１５を緩めてブッシュ１３ごとインペラ１４を引
き抜くことで、加熱や冷却の必要もなく簡単に取り外す
ことができる。On the other hand, when the impeller 14 in the assembled state is to be removed from the rotating shaft 11, the nut 15 at the tip of the rotating shaft 11 is loosened and the impeller 14 is pulled out together with the bush 13, thereby eliminating the need for heating and cooling. It can be easily removed.
【００２８】したがって、従来、組立上の問題から生じ
ていた超高速回転する遠心式低温圧縮機の設計限界を上
げることができ、インペラ１４の設計上の自由度が大き
くなり、高効率、コンパクトな遠心式低温圧縮機を設計
することができる。Therefore, it is possible to raise the design limit of the centrifugal low-temperature compressor that rotates at a high speed, which has conventionally been caused by assembly problems, and the degree of freedom in the design of the impeller 14 is increased, resulting in high efficiency and compactness. Centrifugal low temperature compressor can be designed.
【００２９】また、従来構造では、回転軸へのインペラ
の取付けの際、焼きばめが必要であったが、この取付構
造１０では、予めインペラ１４をブッシュ１３に焼きば
めしておくことができるので、簡単に最終組立を行うこ
とができ、組立性も向上する。Further, in the conventional structure, shrink-fitting is required when the impeller is mounted on the rotating shaft. In this mounting structure 10, the impeller 14 can be shrink-fitted on the bush 13 in advance. Therefore, final assembly can be easily performed, and assemblability is improved.
【００３０】さらに、圧縮機を分解するときやインペラ
１４を交換するときに、従来は高熱を加えてインペラを
取り外す必要があったが、この取付構造１０では、加熱
や冷却を行うこと無く、簡単にブッシュ１３ごとインペ
ラ１４を取り外すことができるとともに、取外し時に損
傷する恐れも少なく繰返し使用することができる。Furthermore, when disassembling the compressor or replacing the impeller 14, it has conventionally been necessary to remove the impeller by applying high heat, but with this mounting structure 10, the impeller can be easily mounted without heating or cooling. In addition, the impeller 14 can be removed together with the bush 13 and can be used repeatedly with little risk of damage at the time of removal.
【００３１】なお、この発明は、上記実施例に限定する
ものでなく、この発明の要旨を変更しない範囲で各構成
要素に変更を加えるようにしても良い。The present invention is not limited to the above-described embodiment, and each component may be modified without changing the gist of the present invention.
【００３２】[0032]
【発明の効果】以上、一実施例とともに具体的に説明し
たようにこの発明の請求項１の遠心式低温圧縮機のイン
ペラ取付構造によれば、インペラに嵌め込むブッシュを
回転軸と同一の熱膨張率の材質とし、このブッシュの外
周にインペラを遠心力が加わっても浮き上がらない締代
を与えて焼きばめするようにしたので、ブッシュとイン
ペラとの取付けを運転時に浮き上がる等の支障がないよ
うにすることができる。As described above in detail with the embodiment, according to the impeller mounting structure of the centrifugal low-temperature compressor according to the first aspect of the present invention, the bush fitted into the impeller has the same heat as the rotating shaft. The bushing is made of a material with an expansion coefficient, and the outer periphery of the bush is shrink-fitted by giving an interference that does not float even when centrifugal force is applied, so that the bush and the impeller are not hindered during operation. You can do so.
【００３３】また、回転軸にはブッシュを介してインペ
ラを隙間無く取付け、回転軸の先端のねじ部にナットを
締付けて軸方向の移動を規制するようにしたので、ブッ
シュと回転軸の等しい熱膨張率によって低温時でも隙間
のない状態で運転でき、加熱や冷却の必要を無くして取
付けや取外しを簡単に行うことができる。Further, the impeller is attached to the rotating shaft via a bush without any gap, and a nut is fastened to the threaded portion at the tip of the rotating shaft to restrict the movement in the axial direction. Even when the temperature is low, the device can be operated without any gaps due to the expansion coefficient, and can be easily mounted and removed without the need for heating or cooling.
【００３４】さらに、この発明の請求項２の遠心式低温
圧縮機のインペラ取付構造によれば、上記の構成に加
え、インペラの熱膨張率と同等以上の材質の背面リング
を用い、これをインペラの運転時に生じる遠心力による
インペラ背面の内径の変形を規制する締代を与えてイン
ペラの背面に焼きばめするようにしたので、低温時の熱
収縮を利用して一層確実にインペラの遠心力による浮き
上がりを防止して安定した回転状態で運転することがで
きる。Further, according to the impeller mounting structure of the centrifugal low-temperature compressor according to the second aspect of the present invention, in addition to the above-described structure, a back ring made of a material equal to or more than the coefficient of thermal expansion of the impeller is used, and this is used. The impeller is shrink-fitted to the back of the impeller by giving a tightening that regulates the deformation of the inner diameter of the back of the impeller due to the centrifugal force generated during the operation of the impeller. It is possible to operate the vehicle in a stable rotation state by preventing the floating due to the lifting.
【００３５】したがって、これまでの構造に比べてイン
ペラの設計上の自由度が大きくなるなどの利点がある。Therefore, there is an advantage that the degree of freedom in the design of the impeller is increased as compared with the conventional structure.
【図１】この発明の遠心式低温圧縮機のインペラ取付構
造の一実施例にかかる組立前および組立後の断面図であ
る。FIG. 1 is a sectional view showing an impeller mounting structure of a centrifugal low-temperature compressor according to an embodiment of the present invention before and after assembling.
【図２】従来の遠心式低温圧縮機のインペラ取付構造に
かかる組立前および組立後の断面図である。FIG. 2 is a cross-sectional view of a conventional centrifugal low-temperature compressor before and after assembling according to an impeller mounting structure.
１０ 遠心式圧縮機のインペラ取付構造 １１ 回転軸 １２ ねじ部 １３ ブッシュ １４ インペラ １５ ナット １６ 背面リング Ｓ1 ブッシュとインペラの焼きばめの締代 Ｓ2 インペラと背面リングの焼きばめの締代 DESCRIPTION OF SYMBOLS 10 Impeller mounting structure of a centrifugal compressor 11 Rotating shaft 12 Thread part 13 Bush 14 Impeller 15 Nut 16 Back ring S1 Shrink fit of shrink fit of impeller and back ring S2 Shrink fit of shrink fit of impeller and back ring
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大矢 博志 東京都江東区豊洲三丁目２番16号 石川 島播磨重工業株式会社 豊洲総合事務所 内 (72)発明者 朝倉 啓 東京都江東区豊洲三丁目２番16号 石川 島播磨重工業株式会社 豊洲総合事務所 内 (72)発明者 長井 俊二 東京都江東区豊洲三丁目２番16号 石川 島播磨重工業株式会社 豊洲総合事務所 内 (58)調査した分野(Int.Cl.7，ＤＢ名) F04D 29/28 F04D 29/30 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Oya 3-2-16-1 Toyosu, Koto-ku, Tokyo Ishikawa-jima-Harima Heavy Industries, Ltd. Toyosu General Office (72) Inventor Kei Asakura 3-chome, Toyosu, Koto-ku, Tokyo No. 2-16 Ishikawajima-Harima Heavy Industries, Ltd. Toyosu Sogo Office (72) Inventor Shunji Nagai 3-2-1 Toyosu, Koto-ku, Tokyo Ishikawa Shima-Harima Heavy Industries Toyosu Sogo Office (58) (Int.Cl. 7 , DB name) F04D 29/28 F04D 29/30
Claims (2)
ブッシュを当該回転軸と同一熱膨張率を有する材質を用
いて形成するとともに、その内径を常温で回転軸との間
に隙間無く装着可能に形成し、このブッシュの外径部に
インペラの運転時に生じる遠心力による変形を相殺する
締代を与えてインペラを焼きばめする一方、このインペ
ラを前記ブッシュを介して先端部にねじ部を備えた回転
軸に装着し軸方向の移動を規制してナットで締付けたこ
とを特徴とする遠心式低温圧縮機のインペラ取付構造。1. A bush fitted between an impeller and a rotating shaft is formed using a material having the same coefficient of thermal expansion as the rotating shaft, and the inner diameter thereof can be mounted at room temperature with no gap between the rotating shaft and the rotating shaft. The shrink fit of the outer diameter portion of the bush is given to the outer diameter portion of the bush by canceling the deformation due to the centrifugal force generated during the operation of the impeller, and the impeller is threaded at the tip portion through the bush. An impeller mounting structure for a centrifugal low-temperature compressor, wherein the impeller is mounted on a rotating shaft provided, restricting movement in the axial direction, and tightened with a nut.
突起に、インペラと同等以上の熱膨張率を有する材質で
形成されインペラの運転時に生じる遠心力によるインペ
ラの内径の変形を規制する締代を与えて背面リングを焼
きばめしたことを特徴とする請求項１記載の遠心式圧縮
機のインペラ取付構造。2. An interference protrusion formed on a rear surface of the impeller, which is formed of a material having a thermal expansion coefficient equal to or higher than that of the impeller, and restricts deformation of the inner diameter of the impeller due to centrifugal force generated during operation of the impeller. 2. The impeller mounting structure for a centrifugal compressor according to claim 1, wherein the rear ring is shrink-fitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05229545A JP3129587B2 (en) | 1993-08-23 | 1993-08-23 | Centrifugal low-temperature compressor impeller mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05229545A JP3129587B2 (en) | 1993-08-23 | 1993-08-23 | Centrifugal low-temperature compressor impeller mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0763193A JPH0763193A (en) | 1995-03-07 |
| JP3129587B2 true JP3129587B2 (en) | 2001-01-31 |
Family
ID=16893848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05229545A Expired - Lifetime JP3129587B2 (en) | 1993-08-23 | 1993-08-23 | Centrifugal low-temperature compressor impeller mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3129587B2 (en) |
Cited By (1)
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| KR101055801B1 (en) * | 2010-12-17 | 2011-08-09 | 한국기계연구원 | Structure for fixing impeller |
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| JP6631094B2 (en) * | 2015-08-26 | 2020-01-15 | 株式会社Ihi | Rotating machinery |
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1993
- 1993-08-23 JP JP05229545A patent/JP3129587B2/en not_active Expired - Lifetime
Cited By (3)
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|---|---|---|---|---|
| WO2014196214A1 (en) * | 2013-06-04 | 2014-12-11 | 三菱重工業株式会社 | Impeller, rotating machine, and method for assembling rotating machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPH0763193A (en) | 1995-03-07 |
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