JPS58192998A - Fixing device for ceramic shaft and impeller - Google Patents
Fixing device for ceramic shaft and impellerInfo
- Publication number
- JPS58192998A JPS58192998A JP7510382A JP7510382A JPS58192998A JP S58192998 A JPS58192998 A JP S58192998A JP 7510382 A JP7510382 A JP 7510382A JP 7510382 A JP7510382 A JP 7510382A JP S58192998 A JPS58192998 A JP S58192998A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- impeller
- ring
- ceramic shaft
- fitted
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/025—Fixing blade carrying members on shafts
-
- 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)
Abstract
Description
【発明の詳細な説明】
本発明はセラミック軸にインペラを固定する固定装置に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing device for fixing an impeller to a ceramic shaft.
従来の圧縮機におけるセラミック軸とインペラとの固定
装置としては例えば第１図に示すようなものがある。こ
こで、ｌはセラミック同転軸であり、このセラミック回
転軸ｌの端部は金属軸２に形成されたスリーブ部３と焼
ばめにより結合されている。更に、金属軸２の軸部４に
インペラ５を嵌め合わせ、軸部４に螺刻されたねじ６に
ナツト７を螺合させることによってセラミック軸ｌとイ
ンペラ５とを固着させている。An example of a fixing device for fixing a ceramic shaft and an impeller in a conventional compressor is shown in FIG. Here, l is a ceramic rotary shaft, and the end of this ceramic rotary shaft l is coupled to a sleeve portion 3 formed on the metal shaft 2 by shrink fitting. Further, an impeller 5 is fitted onto the shaft portion 4 of the metal shaft 2, and a nut 7 is screwed into a screw 6 threaded on the shaft portion 4, thereby fixing the ceramic shaft l and the impeller 5.
しかしながら、このような従来のセラミック軸ｌとイン
ペラ５との固定装置においては、金鶴軸２のスリーブ部
３とセラミック軸ｌとが焼ばめにより結合されていたの
で、次の様な問題点があった。However, in such a conventional fixing device for fixing the ceramic shaft 1 and the impeller 5, the sleeve portion 3 of the gold crane shaft 2 and the ceramic shaft 1 are connected by shrink fit, which causes the following problems. was there.
（１） セラミック軸ｌの外径寸法と金属軸スリーブ
部３の内径寸法との厳密な仕上げ精度が要求されるので
、セラミック軸ｌおよび金属軸２の加工コストが嵩む。(1) Since strict finishing accuracy is required between the outer diameter dimension of the ceramic shaft l and the inner diameter dimension of the metal shaft sleeve portion 3, the processing cost of the ceramic shaft l and the metal shaft 2 increases.
０）金属軸２はセラミック軸１より熱膨張係数が相対的
に大きいので、例えば圧縮機の運転によりセラミック軸
ｌおよび金属軸２の温度が上昇すると、セラミック軸ｌ
と金属軸スリーブ部３との間の元の締めしるが保持され
なくなり、緩みを生じる慣れがある。従って、温度の上
昇に伴なう締めしるの低下を見越した大きな締めしるが
必要となるが、この大きな締めしるによりスリーブ部３
に発生する応力に充分耐えるためには、金属軸２に高強
度の高価な材料を用いなければならない。0) Since the metal shaft 2 has a relatively larger coefficient of thermal expansion than the ceramic shaft 1, for example, when the temperature of the ceramic shaft l and the metal shaft 2 rises due to operation of a compressor, the ceramic shaft l
The original fastening between the metal shaft sleeve part 3 and the metal shaft sleeve part 3 is no longer maintained and tends to loosen. Therefore, a large amount of tightening is required in anticipation of a decrease in the amount of tightening caused by a rise in temperature.
In order to sufficiently withstand the stress generated in the metal shaft 2, a high-strength and expensive material must be used for the metal shaft 2.
本発明の目的は、上述した問題点の解決を図るために金
属軸を除去して、セラミック軸をインペラにまで延在さ
せて直接インペラを嵌合させるようになし、この延在し
たセラミック軸の端部には周方向にリング係止溝を形成
してこの溝に外周面にねじ部を形成したリングを回動不
能に嵌め込み、更にリングのねじ部にインペラ固定用ナ
ツトを螺着するようにして、熱応力により破損せず、か
つ廉価に構成できるセラミック軸とインペラとの固定装
置を提供することにある。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to remove the metal shaft and extend the ceramic shaft to the impeller so that the impeller is directly fitted therein. A ring locking groove is formed in the circumferential direction at the end, a ring having a threaded portion on the outer circumferential surface is fitted into this groove in a non-rotatable manner, and an impeller fixing nut is screwed into the threaded portion of the ring. Therefore, it is an object of the present invention to provide a fixing device for fixing a ceramic shaft and an impeller that is not damaged by thermal stress and can be constructed at low cost.
以下に、図面を参照して本発明を説明する。The present invention will be explained below with reference to the drawings.
第２図は本発明の１実施例を示し、ここで、１１はセラ
ミック回転軸であり、この軸１１の端部にはインペラ５
と嵌合させたときに当接する段付き部１２と軸端部１３
を有する小径軸部１４とを形成する。軸端部１３には、
第３図に示すように、軸端部１３の断面形状が例えば隅
部を面取りした正方形形状となるような円周状のリング
係止１１１ｆ１５を形成する。１６は弾性体、例えばば
ね鋼等によるリングであり、その半径方向にスリット１
７ を形成すると共に、このリング１６を溝１５内に
嵌合するほぼ正方形形状となし、かつリング１６ の
外周面にはねじ部１８を形成し、このねじ部１８にロッ
クナツト１９を螺着させる。FIG. 2 shows an embodiment of the present invention, in which 11 is a ceramic rotating shaft, and an impeller 5 is attached to the end of the shaft 11.
The stepped portion 12 and the shaft end portion 13 that come into contact when mated with the
A small diameter shaft portion 14 is formed. At the shaft end 13,
As shown in FIG. 3, a circumferential ring lock 111f15 is formed such that the cross-sectional shape of the shaft end 13 is, for example, a square shape with chamfered corners. 16 is a ring made of an elastic body, such as spring steel, and has a slit 1 in the radial direction.
7, the ring 16 is formed into a substantially square shape that fits into the groove 15, and a threaded portion 18 is formed on the outer peripheral surface of the ring 16, and a lock nut 19 is screwed into this threaded portion 18.
ここで、セラミック軸１１にインペラ５簀取り付けるに
あたっては、セラミック軸１１の小径軸部１４にインペ
ラ５を嵌合して段付き部１２ に当接させた後、リン
グ１６の内径を押し拡げ軸端部１３の外径より大きくな
して溝１５に嵌め合わせる。Here, in order to attach the impeller 5 to the ceramic shaft 11, after fitting the impeller 5 to the small diameter shaft part 14 of the ceramic shaft 11 and bringing it into contact with the stepped part 12, the inner diameter of the ring 16 is pushed out to expand the shaft end. It is made larger than the outer diameter of the portion 13 and is fitted into the groove 15.
これにより、リング１６は軸部１４に回動不能に嵌着さ
れた状態となるので、このリング１６のねじ部１８にロ
ックナツト１９を所定の締め付はトルクで締め込んでい
くことにより、インペラ５をセラミック軸１１に充分強
固に固着することができる。As a result, the ring 16 is unrotatably fitted to the shaft portion 14, so by tightening the lock nut 19 to the threaded portion 18 of the ring 16 to a predetermined torque, the impeller 5 can be firmly fixed to the ceramic shaft 11.
以上説明してきたように、本発明によれば、セラミック
軸の延在した小径軸部に直接にインペラを吠合させると
共に、このセラミック軸の小径軸部の端部に形成した溝
にリングを回動不能に嵌め込み、このリングの外周に設
けたねじ部にロックナツトを螺着するようにしたので、
従来のように金属軸をセラミック軸に焼ばめするために
、セラミック軸および金属軸の焼ばめ部に高度の仕上り
寸法精度を要求されることがなく、以って、加工コスト
を低減できる。更にまた、本発明によれば、焼ばめ結合
法を用いないので、セラミック軸と金属軸との熱膨張差
により生じる締めしるの問題点が解消し、金属軸の材料
費をも低減することができる。As described above, according to the present invention, the impeller is directly engaged with the extended small diameter shaft portion of the ceramic shaft, and the ring is rotated in the groove formed at the end of the small diameter shaft portion of the ceramic shaft. The ring is fitted in such a way that it cannot be moved, and a lock nut is screwed onto the thread provided on the outer periphery of the ring.
In order to shrink-fit a metal shaft to a ceramic shaft as in the past, a high degree of finished dimensional accuracy is not required for the shrink-fitted portion of the ceramic shaft and metal shaft, thereby reducing processing costs. . Furthermore, according to the present invention, since the shrink fit connection method is not used, the problem of tightening caused by the difference in thermal expansion between the ceramic shaft and the metal shaft is solved, and the material cost of the metal shaft is also reduced. be able to.
第１図は従来のセラミック軸とインペラとの同定装置の
一例を示す断面図、第２図は本発明セラミック軸とイン
ペラとの固定装置の一例を示す断面図、第３図はそのＡ
−Ａ線断面図である。
／・・−セラミック軸、 コ・・・金属軸、３・・
・スリーブ部、 グ・・・軸部、Ｓ・・・インペラ
、 ６・・・ねじ、７・・・ナツト、
／ハ・・セラミック軸、／コ・・・段付き部、
／３・・・軸端部、／４’・・・小径軸部、 １
５・・・係止溝、／６・・・弾性体、／７・・・スリッ
ト、７ｇ・・・ねじ部、／９・・・ロックナツト特許出
願人 日産自動車株式会社FIG. 1 is a sectional view showing an example of a conventional ceramic shaft and impeller identification device, FIG. 2 is a sectional view showing an example of the present invention ceramic shaft and impeller fixing device, and FIG.
-A sectional view. /...-ceramic shaft, ko...metal shaft, 3...
・Sleeve part, G...shaft part, S...impeller, 6...screw, 7...nut,
/c...ceramic shaft, /c...stepped part,
/3...Shaft end, /4'...Small diameter shaft part, 1
5...Latching groove, /6...Elastic body, /7...Slit, 7g...Threaded portion, /9...Lock nut patent applicant Nissan Motor Co., Ltd.
Claims (1)
前記セラミック軸をその端部が前記インペラから突出す
るように前記インペラに嵌合させ、前記セラミック軸の
突出端部には周方向のリング係止溝を形成し、該リング
係止溝に、外周面にねじを有するリングを回動不能に嵌
め込み、前記リングの前記ねじ部にインペラ固定用ナツ
トを螺着させるようにしたことを特徴とするセラミック
軸とインペラとの固定装置。In the fixing device that fixes the impeller to the ceramic shaft,
The ceramic shaft is fitted into the impeller so that its end protrudes from the impeller, a circumferential ring locking groove is formed in the protruding end of the ceramic shaft, and an outer circumferential ring is formed in the ring locking groove. 1. A fixing device for fixing a ceramic shaft and an impeller, characterized in that a ring having a threaded surface is fitted in a non-rotatable manner, and an impeller fixing nut is screwed onto the threaded portion of the ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7510382A JPS58192998A (en) | 1982-05-07 | 1982-05-07 | Fixing device for ceramic shaft and impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7510382A JPS58192998A (en) | 1982-05-07 | 1982-05-07 | Fixing device for ceramic shaft and impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58192998A true JPS58192998A (en) | 1983-11-10 |
Family
ID=13566496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7510382A Pending JPS58192998A (en) | 1982-05-07 | 1982-05-07 | Fixing device for ceramic shaft and impeller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58192998A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100690686B1 (en) | 2005-07-23 | 2007-03-09 | 엘지전자 주식회사 | Reinforced impeller rotating at high speed |
| US20150125306A1 (en) * | 2012-05-02 | 2015-05-07 | Robert Bosch Gmbh | Method for Connecting a Shaft to a Rotary Component and Turbocharger Shaft Produced by said Method |
| CN107023506A (en) * | 2017-05-10 | 2017-08-08 | 巢湖市聚源机械有限公司 | A kind of water pump for being convenient for changing blade |
| CN108302043A (en) * | 2018-03-28 | 2018-07-20 | 山东省章丘鼓风机股份有限公司 | A kind of ceramic slag and stuff pump impeller |
-
1982
- 1982-05-07 JP JP7510382A patent/JPS58192998A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100690686B1 (en) | 2005-07-23 | 2007-03-09 | 엘지전자 주식회사 | Reinforced impeller rotating at high speed |
| US20150125306A1 (en) * | 2012-05-02 | 2015-05-07 | Robert Bosch Gmbh | Method for Connecting a Shaft to a Rotary Component and Turbocharger Shaft Produced by said Method |
| CN107023506A (en) * | 2017-05-10 | 2017-08-08 | 巢湖市聚源机械有限公司 | A kind of water pump for being convenient for changing blade |
| CN108302043A (en) * | 2018-03-28 | 2018-07-20 | 山东省章丘鼓风机股份有限公司 | A kind of ceramic slag and stuff pump impeller |
| CN108302043B (en) * | 2018-03-28 | 2024-03-15 | 山东省章丘鼓风机股份有限公司 | Ceramic slurry pump impeller |
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