JPS6245041Y2 - - Google Patents
Info
- Publication number
- JPS6245041Y2 JPS6245041Y2 JP1982134911U JP13491182U JPS6245041Y2 JP S6245041 Y2 JPS6245041 Y2 JP S6245041Y2 JP 1982134911 U JP1982134911 U JP 1982134911U JP 13491182 U JP13491182 U JP 13491182U JP S6245041 Y2 JPS6245041 Y2 JP S6245041Y2
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- shaft
- bolt
- hole
- tapered
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Description
【考案の詳細な説明】
本考案は、羽根車の取付装置に関するもので、
詳しくは、羽根車を軸の端部に取付ける構造を有
する送風機、圧縮機、ポンプ、タービン等の回転
式流体機械における羽根車の取付装置に関するも
のである。[Detailed description of the invention] This invention relates to an impeller mounting device.
Specifically, the present invention relates to an impeller attachment device for a rotary fluid machine such as a blower, compressor, pump, or turbine, which has a structure in which the impeller is attached to the end of a shaft.
従来の羽根車取付装置の一例として、第１図
に、空気分離装置の寒冷発生源として使用されて
きた膨張タービンのタービン羽根車の軸への取付
状態を示す。すなわち、軸ａと羽根車ｂはキーｄ
を介して動力伝達を行ない、ボルトｃで軸方向に
固定される。このように、キーｄが存在するため
に、面倒なキー合わせ作業を省くことができず、
とくに、片側キーでは、キー溝が回転バランスの
不釣合を生じせしめ、不釣合の修正量が大きくな
る。またキー方式では、軸ａと羽根車ｂの穴とは
締り嵌めであるため、焼嵌め作業も必要であり、
軸ａと羽根車ｂが同一材料の場合には、とくに、
分解は非常に困難な作業となる。また焼嵌めだけ
で軸ａと羽根車ｂの動力伝達を行なう方式では、
締め代の量も大きくなり、分解および組立作業が
一そう難しく場合によつては、軸ａの曲がりを誘
発して振動発生の原因となる。 As an example of a conventional impeller mounting device, FIG. 1 shows how the turbine impeller of an expansion turbine, which has been used as a cold generation source for an air separation device, is mounted to the shaft. That is, shaft a and impeller b are key d
The power is transmitted through the shaft, and it is fixed in the axial direction with bolt c. In this way, because of the existence of key d, the troublesome key matching process cannot be omitted.
In particular, in the case of a one-sided key, the keyway causes an unbalance in the rotational balance, and the amount of unbalance correction becomes large. In addition, in the key method, since the shaft a and the impeller b hole are tightly fitted, shrink fitting work is also required.
In particular, when shaft a and impeller b are made of the same material,
Disassembly is a very difficult task. In addition, in a method that transmits power between shaft a and impeller b only by shrink fitting,
The amount of interference increases, and in some cases, disassembly and assembly operations become more difficult, which may lead to bending of the shaft a, causing vibration.
本考案は、上記従来の装置の欠点を解消するこ
とを目的としてなされたもので、すなわち、羽根
車の軸への取付けおよび分解が容易で、特殊な工
作機械を必要とせず、かつ、小さな軸径にも適用
でき、しかも、組立の再現性がきわめて良好で、
繰返えしの分解ならびに組立後の運転でも、振動
問題の生じない羽根車の取付け装置を提供するこ
とを目的とするものである。 The present invention was made with the aim of eliminating the drawbacks of the conventional devices mentioned above, namely, it is easy to attach and disassemble the impeller to the shaft, does not require special machine tools, and has a small shaft. It can be applied to any diameter, and the reproducibility of assembly is extremely good.
The object of the present invention is to provide an impeller mounting device that does not cause vibration problems even during repeated disassembly and operation after assembly.
このため、本考案の構成は、一端にテーパ軸部
を有するとともに中心にボルト穴を有する羽根車
と、この羽根車の前記テーパ軸部の外周面と同一
テーパのテーパ穴を有するとともに該テーパ穴よ
り小さい径の締付ボルトに螺合するねじ穴を有す
る軸と、前記羽根車の他端から該ボルト穴を通し
て前記軸の該ねじ穴に螺合して前記羽根車と軸が
回転中にその遠心力で隙間が生じない締代で該羽
根車を軸にテーパ結合した締付ボルトとからな
り、かつ、前記羽根車と軸の動力伝達面である軸
心に直角な該軸の端面と羽根車の接合面の作用半
径が該羽根車と締付ボルトの軸心に直角な接合面
の作用半径よりも大きくなつているとともに、該
羽根車の中心の前記ボルト穴の途中には、分解用
の押しボルトが螺合する雌ねじ部を有し、しか
も、前記締付ボルトの途中には、前記雌ねじ部よ
り該羽根車の前記他端寄りで該羽根車の中心の前
記ボルト穴に嵌合してセンタ保持の振れ止めをす
る凸部を有することを特徴としている。 Therefore, the configuration of the present invention includes an impeller having a tapered shaft at one end and a bolt hole in the center, and a tapered hole having the same taper as the outer peripheral surface of the tapered shaft of the impeller. A shaft having a threaded hole into which a tightening bolt of a smaller diameter is threaded, and a shaft which is threaded from the other end of the impeller through the bolt hole into the threaded hole of the shaft so that the impeller and shaft are rotated. The impeller is tapered connected to the shaft by a tightening bolt with a tightness that does not create a gap due to centrifugal force, and the end face of the shaft perpendicular to the axis, which is the power transmission surface of the impeller and the shaft, and the impeller. The radius of action of the joint surface of the vehicle is larger than the radius of action of the joint surface perpendicular to the axes of the impeller and the tightening bolt, and a hole for disassembly is provided in the middle of the bolt hole at the center of the impeller. The tightening bolt has a female threaded portion in the middle thereof which is fitted into the bolt hole at the center of the impeller closer to the other end of the impeller. It is characterized by having a convex portion that serves as a steady rest for holding the center.
以下、本考案の一実施例について、第２図およ
び第３図を参照しながら説明する。 An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.
第２図において、１は軸、２は羽根車、３は締
付ボルトであり、第３図において、４は分解用の
押しボルトである。すなわち、軸１は羽根車２を
取付ける軸であり、締付ボルト３は軸１と羽根車
２とを結合させるボルトである。 In FIG. 2, 1 is a shaft, 2 is an impeller, and 3 is a tightening bolt. In FIG. 3, 4 is a push bolt for disassembly. That is, the shaft 1 is a shaft to which the impeller 2 is attached, and the tightening bolt 3 is a bolt that connects the shaft 1 and the impeller 2.
そして、羽根車２には、一端にテーパ軸部５を
有するとともに、中心に貫通しているボルト穴６
を有し、このボルト穴６の一部には雌ねじ部７が
設けられている。また軸１には、羽根車２のテー
パ軸部５の外周面と密着する同一テーパのテーパ
穴８を軸端部に有するとともに、テーパ穴８より
小さい径の締付ボルト３に螺合するねじ穴９を有
している。 The impeller 2 has a tapered shaft portion 5 at one end, and a bolt hole 6 penetrating through the center.
A female threaded portion 7 is provided in a part of this bolt hole 6. The shaft 1 also has a tapered hole 8 at the end of the shaft with the same taper that is in close contact with the outer peripheral surface of the tapered shaft portion 5 of the impeller 2, and a screw thread that is screwed into a tightening bolt 3 having a diameter smaller than that of the tapered hole 8. It has a hole 9.
また１０は羽根車側の面、１１は軸側の端面で
あり、いずれも軸心に対して直角な平面であり、
羽根車２を軸１に挿入した時、力を加えない状態
で、該面１０と１１の間に必要な押込み代となる
ように加工されており、後述するように、締付ボ
ルト３を軸１のねじ穴９にねじ込んで必要なトル
クで締めあげた場合には、該面１０と１１が圧接
されて軸１と羽根車２の動力伝達面となり、また
羽根車２の軸部５の外周面と軸１のテーパ穴８の
内周面とが密着して軸１と羽根車２が回転中にそ
の遠心力で隙間が生じないテーパ結合となる。 Further, 10 is a surface on the impeller side, and 11 is an end surface on the shaft side, both of which are planes perpendicular to the axis.
When the impeller 2 is inserted into the shaft 1, it is machined so that there is a necessary pushing distance between the surfaces 10 and 11 without applying any force, and as will be described later, the tightening bolt 3 is inserted into the shaft. When screwed into the screw hole 9 of 1 and tightened with the necessary torque, the surfaces 10 and 11 are brought into pressure contact and become the power transmission surface between the shaft 1 and the impeller 2, and the outer periphery of the shaft portion 5 of the impeller 2. The surface and the inner circumferential surface of the tapered hole 8 of the shaft 1 are in close contact with each other, resulting in a tapered connection in which no gap is created due to the centrifugal force of the shaft 1 and the impeller 2 while they are rotating.
前記締付ボルト３の先端のねじ部は、ねじ穴９
と同じサイズかまたは該ボルト３のねじ部の外径
より大きな雌ねじ７の内径を通過し、ねじ穴９に
ねじ込まれるようになつており、また締付ボルト
３には、羽根車２のボルト穴６の中心に該ボルト
３の軸心が保持されるように、振れ止めの凸部１
２が設けられ、回転中の不釣合の発生が防止され
るようになつている。 The threaded portion at the tip of the tightening bolt 3 is inserted into the threaded hole 9.
The tightening bolt 3 is designed to pass through the inner diameter of a female thread 7 that is the same size as or larger than the outer diameter of the threaded portion of the bolt 3 and is screwed into the threaded hole 9. 6, so that the axis of the bolt 3 is held at the center of the steady rest convex part 1.
2 is provided to prevent unbalance from occurring during rotation.
なお雌ねじ部７は羽根車２を軸１から取外す際
に、締付ボルト３を抜いたのち、第３図に示すよ
うな押しボルト４を挿入螺合させて、簡単に分解
するのに使用される。 The female threaded portion 7 is used for easy disassembly when removing the impeller 2 from the shaft 1 by removing the tightening bolt 3 and then inserting and screwing in a push bolt 4 as shown in Fig. 3. Ru.
その他、R1は前記面１０と１１が圧接した場
合の作用半径、R2は前記締付ボルト３と羽根車
２の接合面１３の作用半径で、R1＞R2となつて
いる。 In addition, R 1 is the radius of action when the surfaces 10 and 11 are in pressure contact, R 2 is the radius of action of the joint surface 13 of the tightening bolt 3 and the impeller 2, and R 1 > R 2 .
つぎに、作用について説明する。まず、軸１の
テーパ穴８に羽根車２のテーパ軸部５を挿入して
軸１に羽根車２をテーパ結合させ、羽根車２を押
し込み、羽根車２の面１０を軸１の端面１１に完
全に当てる。そして、締付ボルト３を羽根車２の
他端からボルト穴６に通してねじ孔９に螺合さ
せ、必要なトルクで締付ボルト３を締めあげる。
この際、締付ボルト３に発生する引張力は面１０
と１３に作用し、締付ボルト３を回すことによる
すべりは、二つの面の作用半径の差（R1−R2）に
より、面１３のみで生じる。しかも、テーパ穴８
とテーパ軸部５の締め代の存在は面１０でのすべ
りを阻止する方向に作用する。したがつて、面１
０を境に軸１と羽根車２に合マークを打刻し、軸
１と羽根車２のテーパ結合時に、そのマークを合
わせさえすれば、締付ボルト３を締めあげても、
合マークはずれることがなく、分解と組立を繰返
えしても、バランスの再現性が保たれる。また締
付ボルト３は羽根車２の取付けごとに、羽根車２
に対して位置はずれるが、凸部１２があるので、
該ボルト３の重心の軸心からのずれは制限され、
問題になるような回転中の不釣合が生じない。 Next, the operation will be described. First, the tapered shaft portion 5 of the impeller 2 is inserted into the tapered hole 8 of the shaft 1 to tapered-couple the impeller 2 to the shaft 1, and the impeller 2 is pushed in until the surface 10 of the impeller 2 is completely in contact with the end surface 11 of the shaft 1. Then, the fastening bolt 3 is passed through the bolt hole 6 from the other end of the impeller 2 and screwed into the screw hole 9, and the fastening bolt 3 is tightened with the required torque.
At this time, the tensile force generated in the fastening bolt 3 is
and 13, and slip caused by turning the fastening bolt 3 occurs only on the surface 13 due to the difference in the radius of action of the two surfaces ( R1 - R2 ).
The presence of the interference of the tapered shaft portion 5 acts in the direction of preventing slippage on the surface 10.
Alignment marks are stamped on the shaft 1 and impeller 2 at 0, and as long as the marks are aligned when the shaft 1 and impeller 2 are tapered together, the bolts 3 can be tightened up without any problems.
The alignment marks do not come off, and balance is reproducible even if the impeller is repeatedly disassembled and reassembled.
However, because of the protrusion 12,
The deviation of the center of gravity of the bolt 3 from the axis is limited,
No problematic imbalance occurs during rotation.
このようにして、一度、組立られて釣合せが完
了した羽根車２と軸系は、繰返えしの分解ならび
に組立が容易になされるうえ、組立後の再現性が
常に保持されるので、振動問題のない安定な運転
が保証される。 In this way, once assembled and balanced, the impeller 2 and shaft system can be easily disassembled and reassembled repeatedly, and reproducibility after assembly is always maintained. Stable operation without vibration problems is guaranteed.
なお羽根車２と軸１の動力の伝達は、テーパ軸
部５とテーパ穴８のテーパが緩く（たとえば1/2
０）とられるため、締付ボルト３の引張力が殆ん
ど面１０と１１に作用するので、該面１０と１１
の摩擦力によつて行なわれる。 Note that the transmission of power between the impeller 2 and the shaft 1 is performed when the taper of the tapered shaft portion 5 and the taper hole 8 is loose (for example, 1/2
0), the tensile force of the tightening bolt 3 acts mostly on the surfaces 10 and 11, so the surfaces 10 and 11
This is done by the frictional force of
上述のように、本考案は、軸にテーパ穴を、羽
根車にテーパ軸部を有し、両者を回転中の遠心力
で隙間が生じない締め代を持つような嵌め合いで
結合し、羽根車の中心のボルト穴を通して軸に設
けたねじ穴に締付ボルトをねじ込み、これに加え
るトルクで、羽根車と軸の動力伝達面である該軸
の端面と羽根車の接合面が、すべらない構造にし
てあるから、キー合せ作業や焼嵌めまたは冷し嵌
め作業等がなく、したがつて、羽根車の軸への取
付けおよび分解が容易で、とくに、該羽根車の中
心の前記ボルト穴の途中には、分解用の押しボル
トが螺合する雌ねじ部を有するから、分解の際は
その押しボルトを該雌ねじ部に螺合して行なえば
よく、特殊な工作機械を必要とせず、直径数ミリ
メートルの小さな軸径にも適用でき、しかも、組
立の再現性がきわめて良好で、また前記締付ボル
トの途中には、該締付ボルトの前記軸への締付け
を妨げない位置の前記雌ねじ部より該羽根車の他
端寄りで該羽根車の中心の前記ボルト穴に嵌合し
てセンタ保持の振れ止めをする凸部を有するの
で、該締付ボルトが長くなつても、回転中の振れ
が防止され、繰返えしの分解ならびに組立後の運
転でも、振動問題の生じない安定した回転性能が
保証されるなど、本考案の奏する効果は、きわめ
て大である。 As mentioned above, the present invention has a tapered hole in the shaft and a tapered shaft part in the impeller, and connects them with a fit that has a tightness that does not create a gap due to the centrifugal force during rotation. A tightening bolt is screwed through the bolt hole in the center of the car and into a threaded hole in the shaft, and the torque applied prevents the joint surface between the end face of the shaft and the impeller, which is the power transmission surface between the impeller and the shaft, from slipping. Because of this structure, there is no need for keying, shrink fitting, or cold fitting, and therefore, it is easy to attach and disassemble the impeller to the shaft. There is a female thread in the middle that a push bolt for disassembly is screwed into, so when disassembling the push bolt can be screwed into the female thread, and no special machine tools are required. It can be applied to shaft diameters as small as millimeters, and the reproducibility of assembly is extremely good.In addition, there is a female thread in the middle of the tightening bolt at a position that does not interfere with the tightening of the tightening bolt to the shaft. Since there is a convex portion near the other end of the impeller that fits into the bolt hole at the center of the impeller to prevent sway while holding the center, even if the tightening bolt becomes long, the sway during rotation is prevented. The effects of the present invention are extremely large, such as ensuring stable rotational performance without vibration problems even during repeated disassembly and operation after assembly.
第１図は従来の羽根車の取付装置の一例を示し
た断面図、第２図は本考案の一実施例を示した断
面図、第３図は分解時に使用する押しボルトの一
例を示した側面図である。
１……軸、２……羽根車、３……締付ボルト、
４……押しボルト、５……テーパ軸部、６……ボ
ルト穴、７……雌ねじ部、８……テーパ穴、９…
…ねじ穴、１０……羽根車側の面、１１……軸側
の端面、１２……凸部、１３……羽根車と締付ボ
ルトの接合面。
Fig. 1 is a sectional view showing an example of a conventional impeller mounting device, Fig. 2 is a sectional view showing an embodiment of the present invention, and Fig. 3 is an example of a push bolt used during disassembly. FIG. 1... shaft, 2... impeller, 3... tightening bolt,
4...Push bolt, 5...Tapered shaft, 6...Bolt hole, 7...Female thread, 8...Tapered hole, 9...
... Screw hole, 10 ... Impeller side surface, 11 ... Shaft side end surface, 12 ... Convex portion, 13 ... Joint surface between impeller and tightening bolt.
Claims (1)
ト穴を有する羽根車と、この羽根車の前記テーパ
軸部の外周面と密着する同一テーパのテーパ穴を
有するとともに該テーパ穴より小さい径の締付ボ
ルトに螺合するねじ穴を有する軸と、前記羽根車
の他端から該ボルト穴を通して前記軸の該ねじ穴
に螺合して前記羽根車と軸が回転中にその遠心力
で隙間が生じない締代で該羽根車を軸にテーパ結
合した締付ボルトとからなり、かつ、前記羽根車
と軸の動力伝達面である軸心に直角な該軸の端面
と羽根車の接合面の作用半径が該羽根車と締付ボ
ルトの軸心に直角な接合面の作用半径よりも大き
くなつているとともに、該羽根車の中心の前記ボ
ルト穴の途中には、分解用の押しボルトが螺合す
る雌ねじ部を有し、しかも、前記締付ボルトの途
中には、前記雌ねじ部より該羽根車の前記他端寄
りで該羽根車の中心の前記ボルト穴に嵌合してセ
ンタ保持の振れ止めをする凸部を有することを特
徴とする、羽根車の取付装置。 An impeller having a tapered shaft portion at one end and a bolt hole in the center, and a tightening bolt having a taper hole of the same taper that closely contacts the outer peripheral surface of the tapered shaft portion of the impeller and having a smaller diameter than the tapered hole. A shaft having a screw hole that is screwed into the shaft, and a shaft that is screwed from the other end of the impeller through the bolt hole and into the screw hole of the shaft so that no gap is created due to centrifugal force while the impeller and shaft are rotating. The radius of action of the joint surface of the impeller and the end surface of the shaft perpendicular to the axis, which is the power transmission surface of the impeller and shaft, and is a power transmission surface between the impeller and the shaft. is larger than the operating radius of the joint surface perpendicular to the axis of the impeller and the tightening bolt, and a push bolt for disassembly is screwed into the middle of the bolt hole at the center of the impeller. The tightening bolt has a female threaded portion, and furthermore, a steady rest for center holding is provided in the middle of the tightening bolt by fitting into the bolt hole at the center of the impeller closer to the other end of the impeller than the female threaded portion. An impeller mounting device characterized by having a convex portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13491182U JPS5939701U (en) | 1982-09-07 | 1982-09-07 | Impeller mounting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13491182U JPS5939701U (en) | 1982-09-07 | 1982-09-07 | Impeller mounting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5939701U JPS5939701U (en) | 1984-03-14 |
| JPS6245041Y2 true JPS6245041Y2 (en) | 1987-12-01 |
Family
ID=30303844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13491182U Granted JPS5939701U (en) | 1982-09-07 | 1982-09-07 | Impeller mounting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939701U (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0903465B1 (en) * | 1997-09-19 | 2003-09-03 | ABB Turbo Systems AG | Compressor wheel-shaft connection for high speed turbomachinery |
| KR101030098B1 (en) | 2002-05-06 | 2011-04-20 | 에이비비 터보 시스템즈 아게 | Device for fixing a rotor on a shaft |
| CN106255829B (en) * | 2014-03-26 | 2019-05-31 | 株式会社 Ihi | Impeller connection construction and turbo-compressor |
| WO2019225143A1 (en) * | 2018-05-24 | 2019-11-28 | 株式会社Ihi | Rotating body and supercharger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5688902U (en) * | 1979-12-11 | 1981-07-16 |
-
1982
- 1982-09-07 JP JP13491182U patent/JPS5939701U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5939701U (en) | 1984-03-14 |
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