JPS58176403A - Attachment device of moving blade - Google Patents

Attachment device of moving blade

Info

Publication number
JPS58176403A
JPS58176403A JP5952482A JP5952482A JPS58176403A JP S58176403 A JPS58176403 A JP S58176403A JP 5952482 A JP5952482 A JP 5952482A JP 5952482 A JP5952482 A JP 5952482A JP S58176403 A JPS58176403 A JP S58176403A
Authority
JP
Japan
Prior art keywords
moving blade
rotor blade
variable shaft
void space
attachment device
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
Application number
JP5952482A
Other languages
Japanese (ja)
Inventor
Eiji Yokoyama
英二 横山
Yasushi Takatsu
恭 高津
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.)
Hitachi Ltd
Original Assignee
Hitachi 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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5952482A priority Critical patent/JPS58176403A/en
Publication of JPS58176403A publication Critical patent/JPS58176403A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B23P6/002—Repairing turbine components, e.g. moving or stationary blades, rotors
    • 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
    • F01D7/00—Rotors with blades adjustable in operation; Control thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05D2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05D2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources

Abstract

PURPOSE:To make easy a moving blade replacing work and to reduce a stress level, by providing a convexed part around an outer periphery of a top end of an adjustable shaft, in a moving blade attachment device of an adjustable blade axial flow fan. CONSTITUTION:A void space 2 is defined in a root area 1A of a moving blade 1, and an opening 3 defined in a base surface 2A of the void space 2 has a concaved part 4 formed around a periphery thereof. A convexed part 6 is formed around an outer periphery of a top end of an adjustable shaft 5. In attaching the moving blade 1 to the adjustable shaft 5, the root area 1A is inserted into a boss hole 8A and simultaneously the convexed part 6 is lightly engaged the concaved part 4 with a lower surface 9 of the convexed part 6 connected with the base surface of the void space 2. Connected surfaces 9 and 10 can receive greater centrifugal forces for their increased area. In addition, these surfaces 9 and 10 can provide the moving blade 1 a vibration damping effect for their frictional contacts each other. In this manner, a replacement work of the moving blade can be made easy.

Description

【発明の詳細な説明】 本発明は動翼可変軸流ファンに使用される動翼取付装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotor blade attachment device used in a rotor blade variable axial flow fan.

従来の動翼可変軸流ファンには、動翼と可変軸とを一体
に形成した構造のもの、または別個に製作された動翼と
可変軸とをボルトにより結合した構造のものがある。前
者の一体構造のものは第１図に示すように、動翼１１と
可変軸１２が一体構造であるから、動翼１１のみを交換
する場合には、スラスト軸受１３．ベアリングナツト１
４およびアーム１５を分解および再組立を行う必要があ
る。Conventional axial flow fans with variable rotor blades include those with a structure in which the rotor blades and the variable shaft are integrally formed, or those in which the rotor blades and the variable shaft are separately manufactured and connected with bolts. In the former integral structure, as shown in FIG. 1, the rotor blade 11 and the variable shaft 12 are integrally constructed, so when only the rotor blade 11 is replaced, the thrust bearing 13. Bearing nut 1
4 and arm 15 must be disassembled and reassembled.

後者の動翼と可変軸が別個のものは第２図に示すように
、動翼１１と可変軸１２がボルト１６によυ一体に結合
されている。このため上記のような欠点はないが、（１
）ボルト数に制限があるから、ボルト１本当りに作用す
る遠心応力は大となる、（２）トルク管理を行わないと
ボルトに不均一な荷重が加わる。（３）運転中の振動に
よるボルト応力が大きい、（４）翼の交換作業は狭いス
ペースで手作業で行うため極めて作業が悪いなどの諸欠
点がある。In the latter case where the rotor blades and the variable shaft are separate, the rotor blades 11 and the variable shaft 12 are integrally connected by bolts 16, as shown in FIG. Therefore, there is no drawback as mentioned above, but (1
) Since there is a limit to the number of bolts, the centrifugal stress acting on each bolt will be large. (2) If torque is not controlled, uneven loads will be applied to the bolts. (3) Bolt stress is large due to vibration during operation, and (4) blade replacement work is done manually in a narrow space, which makes the work extremely difficult.

本発明は上記諸欠点を解消し、保守性および信頼性の高
い動翼取付装置を提供することを目的とするもので、可
変軸の頂端外周面に凸部を設け、動翼の根元部に空室を
設けると共に、この空室の底面に設けた開口の周面に可
変軸の凸部が挿入する凹部を設け、と扛らの凹凸部を介
して空室内に可変軸の頂部を挿入し、前記凸部の下端面
と空室の底面とを接合させることを特徴とするものであ
る。It is an object of the present invention to eliminate the above-mentioned drawbacks and provide a rotor blade mounting device with high maintainability and reliability. A vacant chamber is provided, and a concave portion into which the convex portion of the variable shaft is inserted is provided on the circumferential surface of an opening provided at the bottom of the vacant chamber, and the top portion of the variable shaft is inserted into the vacant chamber through the concave and convex portion of the groove. , the lower end surface of the convex portion and the bottom surface of the empty chamber are joined.

以下本発明の一実施例を図面について説明する。An embodiment of the present invention will be described below with reference to the drawings.

第３図において、１は動翼で、この動翼１の根元部ＩＡ
には第４図に示すように空室２が設けら扛ている。この
空室２の底面２人の中央には可変軸５の貫通する開口３
が設けられると共に、この開口３０周面に凹部（切欠き
）４が放射状に４個設けられている。６は第５図に示す
ように可変軸５の頂端外周面に放射状に４個設けられた
凸部で、この凸部６は前記凹部４に遊嵌するように形成
されている。７は動翼１の根元部ＩＡと可変軸５との相
対的ずれを防止するために、両者ＩＡ、５を固定するビ
ンである。In Fig. 3, 1 is a rotor blade, and the root part IA of this rotor blade 1 is
As shown in FIG. 4, a vacant chamber 2 is provided in the chamber. An opening 3 through which a variable shaft 5 passes is located in the center of the bottom of this empty room 2.
is provided, and four recesses (notches) 4 are provided radially around the opening 30. As shown in FIG. 5, four convex portions 6 are provided radially on the outer circumferential surface of the top end of the variable shaft 5, and these convex portions 6 are formed to loosely fit into the concave portions 4. Reference numeral 7 denotes a pin for fixing the root portion IA of the rotor blade 1 and the variable shaft 5 in order to prevent relative displacement between the two.

本実施例は上記のような構成からなシ、可変軸５に動翼
１を取付ける場合には、その根元部ＩＡをポス８のボス
孔８Ａに挿入し、同時に前記空室２の開口３の周面に設
けた切欠き４に、可変軸５の頂部に設けた凸部６を遊嵌
し１．その凸部６を空室２内に挿入する。ついで動翼１
を回動して根元部ＩＡの空室２の底面２Ｂと可変軸５の
凸部６の下端面９とを接合爆ぜ、その後にビン１１を介
して動翼根元部ＩＡと可動軸５とを固定することにより
、動翼１の可変軸５への取付作業は完了する。This embodiment does not have the above-mentioned configuration, but when the rotor blade 1 is attached to the variable shaft 5, the root part IA is inserted into the boss hole 8A of the post 8, and at the same time, the opening 3 of the cavity 2 is inserted. 1. A protrusion 6 provided on the top of the variable shaft 5 is loosely fitted into a notch 4 provided on the circumferential surface. The convex portion 6 is inserted into the empty chamber 2. Then moving blade 1
is rotated to join the bottom surface 2B of the cavity 2 of the root portion IA and the lower end surface 9 of the convex portion 6 of the variable shaft 5, and then connect the rotor blade root portion IA and the movable shaft 5 via the bottle 11. By fixing, the work of attaching the rotor blade 1 to the variable shaft 5 is completed.

上記のように動翼１を外部から操作することにより、動
翼１を可変軸５に極めて容易に取付けることができる。By operating the rotor blade 1 from the outside as described above, the rotor blade 1 can be attached to the variable shaft 5 very easily.

したがって従来のように作業者がケーシングの狭いスペ
ース内に入って締付ポルトを締付ける作業を廃止し、作
業の簡単化をはかることができる。Therefore, it is possible to eliminate the conventional work in which the operator enters the narrow space of the casing and tightens the tightening port, thereby simplifying the work.

筐た動翼１の遠心力を受ける接合面９．１０の面積が増
大するから、従来のボルトにより締結する方式よりも大
きな遠心力を受けることができる。Since the area of the joint surfaces 9 and 10 that receive the centrifugal force of the rotor blade 1 in the housing increases, it is possible to receive a larger centrifugal force than in the conventional method of fastening with bolts.

さらに動翼１は可変軸５に緊密に固着されているのでは
なく、かつ取付面（接合面）９．１０は摩擦接触してい
るので、構造的に動翼１の振動に対して減衰効果がある
。Furthermore, the rotor blade 1 is not tightly fixed to the variable shaft 5, and the mounting surfaces (joint surfaces) 9 and 10 are in frictional contact, so that the vibration of the rotor blade 1 is structurally damped. There is.

以上説明したように本発明によれば、動翼の交換作業を
容易にして保守性の向上をはかると共に、応力レベルお
よび振動応力を低下させることにより１強度および信頼
性を向上さぜることかできる。As explained above, according to the present invention, it is possible to improve maintainability by facilitating the replacement work of rotor blades, and to improve strength and reliability by reducing stress levels and vibration stress. can.

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

第１図および第２図は従来の動翼取付装置を示す断面図
、第３図は本発明の動翼取付装置の一実施例を示す断面
図、第４図および第５図は同実施例の動翼根元部の断面
斜視図および可変軸の頂部斜視図である。 １・・・動翼、ＩＡ・・・根元部、２・・・空室、２Ａ
・・・底面、３・・・開口、４・・・凹部、５・・・可
変軸、６・・・凸部、９゜１０・・・接合面。 第　１　図　　　　　　葛　Ｚ　図1 and 2 are sectional views showing a conventional rotor blade mounting device, FIG. 3 is a sectional view showing an embodiment of the rotor blade mounting device of the present invention, and FIGS. 4 and 5 are sectional views showing the same embodiment. FIG. 2 is a cross-sectional perspective view of the rotor blade root and a top perspective view of the variable shaft. 1... Moving blade, IA... Root part, 2... Vacant room, 2A
...Bottom surface, 3...Opening, 4...Concave portion, 5...Variable shaft, 6...Protrusion, 9°10...Joint surface. Figure 1 Kuzu Z diagram

Claims (1)

【特許請求の範囲】[Claims] 動翼の根元部をボス内に設けた可変軸に着脱可能に取付
ける動翼取付装置において、前記可変軸の頂端外周面に
凸部を設け、前記動翼の根元部に空室を設けると共に、
この空室の底面に設けた開口の周面に可変軸の凸部が挿
入する凹部を設け、これらの凹凸部を介して空室内に可
変軸の頂部を挿入し、前記凸部の下端面と空室の底面と
を接合させること’ｔ％徴とする動翼取付装置。In a rotor blade attachment device for removably attaching a root portion of a rotor blade to a variable shaft provided in a boss, a convex portion is provided on the outer peripheral surface of the top end of the variable shaft, a void is provided at the root portion of the rotor blade, and
A recess into which the convex portion of the variable shaft is inserted is provided on the circumferential surface of the opening provided at the bottom of this cavity, and the top of the variable shaft is inserted into the cavity through these concave and convex portions, and the bottom surface of the convex portion and the top of the variable shaft are inserted into the cavity. A rotor blade attachment device that connects the bottom surface of the cavity.
JP5952482A 1982-04-12 1982-04-12 Attachment device of moving blade Pending JPS58176403A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5952482A JPS58176403A (en) 1982-04-12 1982-04-12 Attachment device of moving blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5952482A JPS58176403A (en) 1982-04-12 1982-04-12 Attachment device of moving blade

Publications (1)

Publication Number Publication Date
JPS58176403A true JPS58176403A (en) 1983-10-15

Family

ID=13115736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5952482A Pending JPS58176403A (en) 1982-04-12 1982-04-12 Attachment device of moving blade

Country Status (1)

Country Link
JP (1) JPS58176403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60108597A (en) * 1983-10-07 1985-06-14 ノルデイスク・ヴエンティラ−ト−・コンパニ−・ア−／エス Blade having blade shaft of impeller of axial flow fan

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60108597A (en) * 1983-10-07 1985-06-14 ノルデイスク・ヴエンティラ−ト−・コンパニ−・ア−／エス Blade having blade shaft of impeller of axial flow fan
JPH0512558B2 (en) * 1983-10-07 1993-02-18 Norudeisuku Benchiratooru Co As

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