JPH0228712B2 - - Google Patents
Info
- Publication number
- JPH0228712B2 JPH0228712B2 JP59021997A JP2199784A JPH0228712B2 JP H0228712 B2 JPH0228712 B2 JP H0228712B2 JP 59021997 A JP59021997 A JP 59021997A JP 2199784 A JP2199784 A JP 2199784A JP H0228712 B2 JPH0228712 B2 JP H0228712B2
- Authority
- JP
- Japan
- Prior art keywords
- blade angle
- bearing
- casing
- rotating shaft
- piece
- 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
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/14—Rotors having adjustable blades
- F03B3/145—Mechanisms for adjusting the blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
- F05B2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Hydraulic Turbines (AREA)
Description
【発明の詳細な説明】
本発明は、中空回転軸を貫通する翼角制御用操
作軸を軸方向に移動させることによつて、翼角度
を制御する可動翼を備えた流体機械の翼角制御装
置に関する。Detailed Description of the Invention The present invention provides blade angle control for a fluid machine equipped with movable blades that controls the blade angle by moving a blade angle control operating shaft passing through a hollow rotating shaft in the axial direction. Regarding equipment.
従来のこの種の翼角制御装置は、第１図に示す
ように、電動機Ｍの軸２７に、軸継手７ａ，７ｂ
を介して直結された中空状の回転軸１の先端に可
動翼Ｉが取付けられ、該可動翼Ｉは、アームａと
リンクｌを介して操作軸２の先端に取付けたスパ
イダ２ａに連結され、該操作軸２の基部は、クロ
スヘツド３と連結棒５を介してスラストカラー８
に連結される。該スラストカラー８は、スラスト
パツド１０ａ，１０ｂを介して、外側におねじ９
ｓを切つた軸受ケーシング９に支持され、該軸受
ケーシング９は、上記おねじ９ｓとねじ係合する
めねじ１４ｓを内側に切り外側にウオームホイー
ルw2を形成した駒１４と係合し、該駒１４はケ
ーシング１３に支持されたウオームw1によつて
駆動されるように構成されている。 As shown in FIG. 1, a conventional blade angle control device of this type has shaft couplings 7a and 7b attached to a shaft 27 of an electric motor M.
A movable blade I is attached to the tip of a hollow rotating shaft 1 that is directly connected via an arm a and a link l to a spider 2a attached to the tip of an operating shaft 2. The base of the operating shaft 2 is connected to a thrust collar 8 via a crosshead 3 and a connecting rod 5.
connected to. The thrust collar 8 is threaded outwardly through thrust pads 10a and 10b.
The bearing casing 9 is supported by a bearing casing 9 which has a s-shaped cut, and the bearing casing 9 engages with a piece 14 in which a female thread 14s that engages with the male thread 9s is cut inward and a worm wheel w2 is formed on the outside. 14 is configured to be driven by a worm w 1 supported by the casing 13 .
上記の可動翼Ｉの翼角を変更する場合、ウオー
ムw1を回転して駒１４を回転させると、それと
ねじ係合する軸受ケーシング９は、ケーシング１
３との間に設けらた滑りキー１１によつて回転で
きないため、上下方向に移動する。この上下方向
の移動により、スラストカラー８、連結棒５、ク
ロスヘツド３を介して操作軸２を上下動して、可
動翼Ｉの翼角度が所望の角度に制御される。一
方、羽根車Ｉに作用する流体圧力差により、回転
軸１には流体スラストが働き、このスラスト力
は、軸継手７ａ，７ｂを介し電動機Ｍの主スラス
ト軸受ｔによつて支持される。 When changing the blade angle of the movable blade I mentioned above, when the worm w 1 is rotated and the piece 14 is rotated, the bearing casing 9 that is threadedly engaged with the worm w 1 is moved from the casing 1
Since it cannot be rotated by the sliding key 11 provided between it and 3, it moves in the vertical direction. By this vertical movement, the operating shaft 2 is moved up and down via the thrust collar 8, connecting rod 5, and crosshead 3, and the blade angle of the movable blade I is controlled to a desired angle. On the other hand, due to the fluid pressure difference acting on the impeller I, a fluid thrust acts on the rotating shaft 1, and this thrust force is supported by the main thrust bearing t of the electric motor M via the shaft couplings 7a and 7b.
ところが、上記のような従来の翼角制御装置で
は、操作軸２と回転軸１との間に、可動翼の取付
部軸受やシール部の摩擦力が働き、この摩擦力に
より、操作軸２の下降時には回転軸１は下降さ
れ、また上昇時には回転軸も上昇することにな
り、それだけ回転軸１の支持を強化する必要が生
じ、また操作軸に余分な力が必要となる外、操作
軸の変位がそのまま翼角度の変化とならないの
で、正確な機械的な制御ができないなどの欠点が
あつた。 However, in the conventional blade angle control device as described above, the frictional force of the mounting part bearing and seal part of the movable blade acts between the operating shaft 2 and the rotating shaft 1, and this frictional force causes the operating shaft 2 to change. When descending, the rotary shaft 1 is lowered, and when ascending, the rotary shaft also rises, which makes it necessary to strengthen the support of the rotary shaft 1, and requires extra force on the operating shaft. Since the displacement does not directly result in a change in the blade angle, there were drawbacks such as the inability to perform accurate mechanical control.
そのため、第２図に示すように、操作軸２の上
端に連結されたコツタ３ｘを回転軸１のスリツト
ｓを貫通してスラストカラー（内側軸受箱）８ｘ
で支持し、これを上部スラスト軸受１０ａ，１０
ｂを介して軸受ケーシング（外側軸受箱）９ｘで
支持し、該軸受ケーシング９ｘとねじ係合する別
個の軸受箱１４ｘを、下部スラスト軸受２０ｘを
介して回転軸１に取付け、該軸受箱１４ｘを回転
不能に且つ軸方向に移動可能に設け、上記軸受ケ
ーシング９ｘを、軸受箱１４ｘに取付けた駆動機
構（ウオームw1を介して回転させるようにした
ものが提案されている（特開昭58−185995号公報
参照）。なお、図中、ｂはベースに固定されたガ
イドピン、ｃはガイド穴、ｄは支柱、ｅはスライ
ドキーを示す。 Therefore, as shown in FIG.
This is supported by upper thrust bearings 10a, 10.
A separate bearing box 14x supported by the bearing casing (outer bearing box) 9x via b and threadedly engaged with the bearing casing 9x is attached to the rotating shaft 1 via the lower thrust bearing 20x, and the bearing box 14x is attached to the rotating shaft 1 via the lower thrust bearing 20x. A mechanism has been proposed in which the bearing casing 9x is rotated via a drive mechanism (worm w1 ) which is provided non-rotatably but movable in the axial direction and is attached to the bearing box 14x (Japanese Patent Application Laid-Open No. 1983-1999). (See Publication No. 185995). In the figure, b indicates a guide pin fixed to the base, c indicates a guide hole, d indicates a support, and e indicates a slide key.
そして上記提案のものでは、操作軸２の上下動
による翼の操作力は、回転軸１に対してのみ作用
するため、前記のような摩擦力は、回転軸上に生
じる反力によつて相殺されることにより、第１図
のような従来のものの欠点は除去される。しかし
ながらこのものでは、操作軸２に軸方向移動量を
伝達する軸受ケーシング９ｘが回転しながら軸方
向に移動するので、軸方向の移動量の検出が困難
であるばかりでなく、動機構に図示のようなウオ
ーム機構を用いる場合、ウオームホイールw2の
内周と軸受ケーシング９ｘの外周との間には軸方
向の摺動間隙が必要となるため、軸方向と半径方
向に支持されていないウオームホイールw2とウ
オームw1との歯当りが悪く、歯の異常摩擦や欠
損の恐れがあり、また、回転軸１の芯出し誤差に
よる偏芯や振れ等が各軸受に大きな荷重を与える
恐れがある外、軸受ケーシング９ｘを回転附勢す
るための駆動機構w1を軸受箱１４ｘに取付けて
いるので、これらの駆動機構及び軸受箱１４ｘは
共に回転軸１により軸方向に支持され、したがつ
て、それだけ主スラスト軸受が大形、大容量化す
る等の欠点がある。 In the above proposal, since the operating force of the blade due to the vertical movement of the operating shaft 2 acts only on the rotating shaft 1, the frictional force described above is canceled out by the reaction force generated on the rotating shaft. By doing so, the drawbacks of the conventional one as shown in FIG. 1 are eliminated. However, in this case, since the bearing casing 9x that transmits the axial movement amount to the operating shaft 2 moves in the axial direction while rotating, it is not only difficult to detect the axial movement amount, but also the moving mechanism has When using such a worm mechanism, an axial sliding gap is required between the inner circumference of the worm wheel w2 and the outer circumference of the bearing casing 9x. There is poor tooth contact between w 2 and worm w 1 , which may cause abnormal friction or breakage of the teeth, and eccentricity or runout due to centering error of rotating shaft 1 may cause large loads to be applied to each bearing. On the other hand, since the drive mechanism w1 for rotationally energizing the bearing casing 9x is attached to the bearing box 14x, both the drive mechanism and the bearing box 14x are supported in the axial direction by the rotating shaft 1, and therefore, There are disadvantages such as the main thrust bearing being larger and having a larger capacity.
本発明の目的は、前記した従来技術の欠点を除
去することができ、回転軸の主のスラスト軸受に
翼角操作力及び操作駆動手段の荷重が作用せず、
軸受ケーシングを軸方向に移動する駒への回転力
の伝達を良好にし、また軸受には芯出し誤差や回
転軸の振れに基づく大きな荷重が加わらないよう
にした組立容易な可動翼を備えた流体機械の翼角
制御装置を提供するにある。 An object of the present invention is to be able to eliminate the drawbacks of the prior art described above, and to prevent the blade angle operating force and the load of the operating drive means from acting on the main thrust bearing of the rotating shaft.
A fluid fluid with easy-to-assemble movable blades that improves the transmission of rotational force to the piece that moves the bearing casing in the axial direction, and prevents large loads from being applied to the bearing due to centering errors or runout of the rotating shaft. To provide mechanical blade angle control devices.
この目的を達成するために、本発明は、ケーシ
ングに固定された軸受を介して回転軸の周囲に、
回転可能な該ケーシングに対して軸方向に移動可
能に設けられ且つねじを備えた駒と、該駒を軸方
向に支持する回転軸に固定された軸受と、ケーシ
ングに固定された軸受に支持され前記駒のねじに
係合するねじを備え且つ軸受を介して操作軸に対
して軸方向に連結された、回転不能で軸方向移動
自在な軸受ケーシングと、駒を回転附勢し且つケ
ーシングに支持された操作駆動手段を備えたこと
を特徴としている。 In order to achieve this objective, the present invention provides a structure in which:
A piece provided to be movable in the axial direction with respect to the rotatable casing and equipped with a screw, a bearing fixed to a rotating shaft that supports the piece in the axial direction, and a piece supported by the bearing fixed to the casing. a non-rotatable but axially movable bearing casing that is provided with a screw that engages with the screw of the bridge and is axially connected to the operating shaft via a bearing; It is characterized by being equipped with an operation drive means.
以下に、本発明の実施例を、第３図ないし第５
図について詳しく説明する。なお、第３図ないし
第５図に示す符号のうち、第１図及び第２図に示
す符号と同一のものは、同一ないし同類部分を示
すものとする。 Embodiments of the present invention will be described below with reference to FIGS. 3 to 5.
The diagram will be explained in detail. Note that among the reference numerals shown in FIGS. 3 to 5, the same reference numerals as those shown in FIGS. 1 and 2 indicate the same or similar parts.
第３図は、本発明の翼角制御装置の第１実施例
の縦断面図である。図において、下端に可動翼を
備えた流体機械の中空の回転軸１の内部に、翼角
制御用操作軸２が軸方向移動自在に挿通されてお
り、該操作軸２の下方には、可動翼に連結された
直接の操作部材が係合され、またその上端部は円
板のクロスヘツド３の中央部に嵌入され且つ軸ナ
ツト４で固定されている。上記クロスヘツド３の
円周上で、軸方向の孔に嵌入しナツト６で固定さ
れた複数個の連結棒５は、軸接手７ｂを摺動自在
に貫通して上部スラストカラー８に接続されてい
る。該上部スラストカラー８は、軸受ケーシング
９に対して軸方向に移動しないように且つ相対回
転軸自在で半径方向に移動可能に、上部スラスト
パツド１０ａ，１０ｂを介して連結されており、
該軸受ケーシング９は、滑りキー１１を介して回
転不能で軸方向には移動自在に、ケーシング１３
に固定された軸受１２に滑入されており、またそ
の下部外周には、回転軸１と同芯のおねじ９ｓが
切られ、駒１４の内周に切られたねじ１４ｓと係
合している。上記駒１４の外周には、電動機の回
転子１５が固定され、該回転子１５と空隙をおい
て固定子１６がケーシング１３に固定して配され
ている。また該駒１４は、その上下端に固定され
た摺動部材１７，１８を介して、ケーシング１３
に固定された軸受１２，１９により、回転軸１の
周りに回転自在で且つケーシング１３に対して軸
方向に移動可能に、半径方向に支持されており、
また、下部スラストパツド２０ａ，２０ｂを介し
て下部スラストカラー２１に、該カラー２１に対
して軸方向に移動しないように、且つ相対回転自
在で半径方向移動可能に連結されている。上記下
部スラストカラー２１は、キー２２、デイスタン
スピース２３を介して回転軸１に軸ナツト２４で
固定されている。なお、上部の軸接手７ｂは、キ
ー２５を介して回転軸１に嵌入されて軸ナツト２
６で固定され、また軸接手７ａは、動力伝達軸２
７に固定されていて、両軸１と２７は主動力の伝
達を行なつている。 FIG. 3 is a longitudinal sectional view of the first embodiment of the blade angle control device of the present invention. In the figure, a blade angle control operating shaft 2 is inserted into a hollow rotary shaft 1 of a fluid machine equipped with movable blades at the lower end so as to be movable in the axial direction. A direct operating member connected to the wing is engaged, and its upper end is inserted into the central part of the crosshead 3 of the disc and is fixed with an axle nut 4. A plurality of connecting rods 5 are fitted into axial holes on the circumference of the crosshead 3 and fixed with nuts 6, and are connected to the upper thrust collar 8 by slidingly passing through the shaft joint 7b. . The upper thrust collar 8 is connected to the bearing casing 9 via upper thrust pads 10a and 10b so as not to move in the axial direction and to be movable in the radial direction with free relative rotation axis.
The bearing casing 9 is connected to a casing 13 through a sliding key 11 so as to be non-rotatable but movable in the axial direction.
A male thread 9s coaxial with the rotating shaft 1 is cut on the outer periphery of the lower part of the bearing 12, and is engaged with a thread 14s cut on the inner periphery of the bridge 14. There is. A rotor 15 of an electric motor is fixed to the outer periphery of the piece 14, and a stator 16 is fixed to the casing 13 with a gap between the rotor 15 and the rotor 15. Further, the piece 14 is connected to the casing 13 via sliding members 17 and 18 fixed to the upper and lower ends thereof.
It is supported in the radial direction by bearings 12 and 19 fixed to the casing 13 so as to be rotatable around the rotating shaft 1 and movable in the axial direction with respect to the casing 13.
It is also connected to the lower thrust collar 21 via the lower thrust pads 20a, 20b so as not to move in the axial direction with respect to the collar 21, and to be relatively rotatable and movable in the radial direction. The lower thrust collar 21 is fixed to the rotating shaft 1 with a shaft nut 24 via a key 22 and a distance piece 23. Note that the upper shaft joint 7b is fitted onto the rotating shaft 1 via the key 25, and is connected to the shaft nut 2.
6, and the shaft joint 7a is fixed to the power transmission shaft 2.
7, and both shafts 1 and 27 transmit main power.
前記回転子１５の軸方向位置は、動力伝達軸２
７を軸方向に支持する主スラスト軸受（第１図の
ｔ）の軸方向位置によつて決まり、また固定子１
６の軸方向位置は、翼角制御装置のケーシング１
３の軸方向位置で決まる。従つて、回転子１５と
固定子１６の軸方向の相対位置関係は、装置全体
の製作、組立精度に大きく依存し、接計値に対す
る誤差は大きくなるが、本実施例では、回転子１
５の軸方向長さを回転力の発生に必要な長さと
し、固定子１６の長さを回転子１５より長くして
前記誤差を吸収する構造となつている。またこの
逆も可能である。なお、このような装置に用いら
れる電動機は、例えばステツピングモータ、サイ
リスタモータ等や多極誘導電動機を電圧、周波数
制御して用いられるのが好適である。図中、Ａは
軸受ケーシング９の軸方向の位置を検出する位置
検出器、Ｂは上記位置検出器Ａの値によつて翼角
制御用電動機を制御するために、検出器Ａと固定
子１６にそれぞれ接続された制御器、Ｃは電源、
Ｐはオイルポンプ、Ｄはクーラを示す。 The axial position of the rotor 15 is relative to the power transmission shaft 2
It is determined by the axial position of the main thrust bearing (t in Figure 1) that supports the stator 1 in the axial direction.
The axial position of 6 is the casing 1 of the blade angle control device.
It is determined by the axial position of 3. Therefore, the relative positional relationship in the axial direction between the rotor 15 and the stator 16 largely depends on the manufacturing and assembly accuracy of the entire device, and the error with respect to the tangential value becomes large; however, in this embodiment, the rotor 1
The length of the stator 16 in the axial direction is set to be the length necessary to generate rotational force, and the length of the stator 16 is made longer than the rotor 15 to absorb the above-mentioned error. The reverse is also possible. The electric motor used in such a device is preferably a stepping motor, a thyristor motor, or a multipolar induction motor that is voltage- and frequency-controlled. In the figure, A is a position detector that detects the axial position of the bearing casing 9, and B is a detector A and a stator 16 for controlling the blade angle control motor based on the value of the position detector A. controllers connected to each, C is the power supply,
P indicates an oil pump, and D indicates a cooler.
この実施例によれば、可動翼を有する流体機械
の運転中は、常に、回転軸１、軸継手７ａ，７
ｂ、動力伝達軸２７などの主動力伝達系と共に、
翼角制御用操作軸２、クロスヘツド３、連結棒
５、上部スラストカラー８、下部スラストカラー
２１、軸ナツト２４等が一体に回転する。翼角度
を一定に保持しておく場合には、駒１４を駆動す
る回転子１５と固定子１６とからなる電動機に回
転力を発生させないように制御するか又は通電し
ない。従つて駒１４は回転しないので、軸受ケー
シング９及び上部スラストカラー８は動かず、翼
角制御用操作軸２も軸方向に移動しないので、翼
角度は一定に保たれる。一方、翼角制御を行なう
場合には、前記電動機に回転力を発生させること
により、回転子１５は回転し、駒１４は回転す
る。それにつれて、駒１４の内周に切られたねじ
１４ｓと、軸受ケーシング９の下部外周に切られ
たおねじ９ｓとのねじ対偶により、軸受ケーシン
グ９は軸方向に移動する。この軸受ケーシング９
の軸方向運動は、上部スラストパツド１０ａ，１
０ｂを介して上部スラストカラー８に伝達され、
連結棒５、クロスヘツド３を介して翼角制御用操
作軸２を軸方向に移動させ、翼角度が変化する。
翼角度を上記と逆に変化させる場合には、上記と
逆方向に電動機を回転させればよい。 According to this embodiment, during operation of a fluid machine having movable blades, the rotating shaft 1, the shaft couplings 7a, 7
b, together with the main power transmission system such as the power transmission shaft 27,
The blade angle control operating shaft 2, crosshead 3, connecting rod 5, upper thrust collar 8, lower thrust collar 21, shaft nut 24, etc. rotate together. When the blade angle is held constant, the electric motor that drives the piece 14 and is made up of a rotor 15 and a stator 16 is controlled so as not to generate rotational force or is not energized. Therefore, since the bridge 14 does not rotate, the bearing casing 9 and the upper thrust collar 8 do not move, and the blade angle control operating shaft 2 does not move in the axial direction, so the blade angle is kept constant. On the other hand, when performing blade angle control, the rotor 15 rotates and the piece 14 rotates by generating rotational force in the electric motor. Accordingly, the bearing casing 9 moves in the axial direction due to the screw pair of the screw 14s cut on the inner circumference of the bridge 14 and the male screw 9s cut on the lower outer circumference of the bearing casing 9. This bearing casing 9
The axial movement of the upper thrust pad 10a, 1
transmitted to the upper thrust collar 8 via 0b,
The blade angle is changed by moving the blade angle control operating shaft 2 in the axial direction via the connecting rod 5 and crosshead 3.
If the blade angle is to be changed in the opposite direction to the above, the electric motor may be rotated in the opposite direction.
この実施例によれば、次のような効果が奏され
る。 According to this embodiment, the following effects are achieved.
(i)翼角操作力としての軸方向推力は、下部スラ
ストパツド２０ａ，２０ｂを介して下部スラスト
カラー２１によつて坦持される。つまり翼角操作
力は回転軸１によつて支持され、該回転軸１はキ
ー２５を介して主動力の伝達が行われるようにな
つているので、翼角操作力の主スラスト軸受への
影響がない。(ii)軸受ケーシング９及び駒１４の支
持を、半径方向にはケーシング１３で支持し、軸
方向には回転軸１で支持するように両者を分離し
ているので、回転子１５と固定子１６間の半径方
向隙間は、回転軸１と動力伝達軸２７の芯出し誤
差による回転軸１のケーシング１３に対する偏芯
や傾き及び回転軸１の振れ等の影響を受けること
なく、適正値に保つことができる。従つて固定子
１６をケーシングに支持させることも可能とな
る。(iii)駒や軸受ケーシングを軸方向に支持する両
軸受を半径方向に移動可能に構成しているので、
前記(ii)の支持構造と相俟つて、芯出し誤差や回転
軸１の振れに基づく大きな荷重を受けずに済むの
で良好な使用が可能である。(iv)駒を回転附勢する
操作駆動手段即ち電動機の固定子をケーシング１
３で支持しているので、それだけ、主スラスト軸
受への荷重が小さくなる。(v)軸方向に移動する軸
受ケーシング９は回転しないので、その位置検出
が容易となり、従つて翼角度の制御が容易とな
る。(vi)駒１４とケーシング１３の軸方向の相対位
置に、装置全体の製作、組立精度により誤差が出
るが、駒１４への回転力の伝達機能に軸方向の裕
度がとれるので、組立が容易である。 (i) Axial thrust as a blade angle operating force is supported by the lower thrust collar 21 via the lower thrust pads 20a, 20b. In other words, since the blade angle operating force is supported by the rotating shaft 1, and the main power is transmitted to the rotating shaft 1 via the key 25, the influence of the blade angle operating force on the main thrust bearing is There is no. (ii) Since the bearing casing 9 and the piece 14 are supported in the radial direction by the casing 13 and in the axial direction by the rotating shaft 1, they are separated, so the rotor 15 and the stator 16 The radial gap between the rotary shaft 1 and the power transmission shaft 27 must be maintained at an appropriate value without being affected by eccentricity or inclination of the rotary shaft 1 with respect to the casing 13 due to a centering error between the rotary shaft 1 and the power transmission shaft 27, as well as deflection of the rotary shaft 1. Can be done. Therefore, it is also possible to support the stator 16 on the casing. (iii) Since both bearings that support the bridge and bearing casing in the axial direction are configured to be movable in the radial direction,
In combination with the support structure described in (ii) above, it is not necessary to receive a large load due to centering errors or runout of the rotating shaft 1, so that it can be used satisfactorily. (iv) The operation drive means for rotationally energizing the piece, that is, the stator of the electric motor, is placed in the casing 1
3, the load on the main thrust bearing is reduced accordingly. (v) Since the bearing casing 9, which moves in the axial direction, does not rotate, its position can be easily detected, and therefore the blade angle can be easily controlled. (vi) Although there will be errors in the relative axial positions of the bridge 14 and the casing 13 due to the manufacturing and assembly precision of the entire device, the ability to transmit the rotational force to the bridge 14 will have axial tolerance, so assembly will be easy. It's easy.
第４図は、本発明の第２実施例を示す縦断面
図、第５図は、第４図の平面断面図である。この
実施例では、駒を回転附勢させる操作駆動手段の
部分のみが前記第１実施例と異なつている。 FIG. 4 is a longitudinal sectional view showing a second embodiment of the present invention, and FIG. 5 is a plan sectional view of FIG. 4. This embodiment differs from the first embodiment only in the operating driving means for rotating and energizing the pieces.
すなわち、駒１４の外周には平歯車１４ｇが切
られており、該平歯車１４ｇは回転軸１と平行な
翼角操作力入力軸２８に固定された平歯車２９と
かみ合つている。また上記平歯車１４ｇの歯幅
は、強度上必要な歯幅となつており、また平歯車
２９の歯幅は、装置全体の製作、組立精度に依存
する平歯車１４ｇと平歯車２９の軸方向相対位置
の誤差を吸収できるように、平歯車１４ｇより広
くなつている。なお、この逆も可能である。ま
た、上記翼角操作力入力軸２８は、ケーシング１
３に軸受３０，３１により回転自在に支持され、
該軸２８の軸端には小傘歯車３２とかみ合う傘歯
車３３が固定されている。上記小傘歯車３２は、
ケーシング１３に軸受３５，３６を介して回転自
在に支持された操作用の駆動機３４の操作駆動軸
３７の端部に固定されている。 That is, a spur gear 14g is cut on the outer periphery of the bridge 14, and the spur gear 14g meshes with a spur gear 29 fixed to a blade angle operating force input shaft 28 parallel to the rotating shaft 1. Further, the face width of the spur gear 14g is the face width required for strength, and the face width of the spur gear 29 is determined in the axial direction of the spur gear 14g and the spur gear 29, which depends on the manufacturing and assembly accuracy of the entire device. It is wider than the spur gear 14g so that errors in relative position can be absorbed. Note that the reverse is also possible. Further, the blade angle operating force input shaft 28 is connected to the casing 1
3 is rotatably supported by bearings 30 and 31,
A bevel gear 33 that meshes with a small bevel gear 32 is fixed to the shaft end of the shaft 28 . The small bevel gear 32 is
It is fixed to the end of an operation drive shaft 37 of an operation drive machine 34 rotatably supported by the casing 13 via bearings 35 and 36.
上記操作用の駆動機３４を回転すると、傘歯車
３２，３３を介して翼角操作力入力軸２８が回転
し、平歯車２９が回転するので、該平歯車２９か
ら平歯車１４ｇに回転を伝え、駒１４は回転す
る。従つて、操作用駆動機３４を正逆転すること
により翼角の制御を行なうことができる。 When the operating drive unit 34 is rotated, the blade angle operating force input shaft 28 rotates via the bevel gears 32 and 33, and the spur gear 29 rotates, so rotation is transmitted from the spur gear 29 to the spur gear 14g. , the piece 14 rotates. Therefore, the blade angle can be controlled by rotating the operating drive unit 34 in the forward and reverse directions.
この実施例によれば、第１実施例と同様に、軸
受ケーシング９と駒１４の半径方向の支持をケー
シング１３で行なつているので、両平歯車１４ｇ
と２９の中心軸間距離は常に適正値に保たれる。
また、その他第１実施例と同様の効果が奏され
る。 According to this embodiment, as in the first embodiment, since the bearing casing 9 and the bridge 14 are supported in the radial direction by the casing 13, both spur gears 14g
The distance between the center axes of and 29 is always kept at an appropriate value.
In addition, other effects similar to those of the first embodiment are achieved.
なお、前記両実施例においては、主としてポン
プについ説明したが、本発明をポンプ以外の流体
機械、例えば水車等に適用することも可能であ
る。 In both of the above embodiments, the explanation has mainly been given to the pump, but the present invention can also be applied to fluid machines other than pumps, such as water turbines.
以上説明したように、本発明によれば、(i)回転
軸上に翼角制御のための機械的作動手段を設けた
ので回転軸の主スラスト軸受には翼角操作力が作
用せず、該スラスト軸受を小型化できる。(ii)駒の
回転をねじ対偶を用いて軸方向運転に変換してい
るので、翼が受ける流体力により翼角制御用操作
軸が動力を受けても、ねじの摩擦により駒は回転
せず、翼角制御時以外は翼角を一定に保つために
動力を必要としない。(iii)軸受ケーシングと駒の支
持を半径方径にはケーシングで支持し、軸方向に
のみ主軸で支持するように分離したので、駒への
回転力の伝達が良好であり、また回転軸は軸受ケ
ーシング及び駒に対して半径方向に移動可能とな
り、軸受に芯出し誤差や回転軸の振れに基づく大
きな荷重が加わらない。(iv)駒とケーシングの軸方
向の相対位置に装置全体の製作、組立精度により
誤差が出るが、駒への回転力の伝達機構に軸方向
の裕度があるので組立が容易である。(v)翼角制御
用操作軸の位置検出が容易である。(vi)駒を、軸方
向に拘束されたスラストリングをベースにして軸
方向に移動させるようにした本発明の先願に係る
発明（特願昭58−215662号、特公平１−22474号
公報参照）では、回転子や平歯車を設けた駒が軸
方向に移動するので、回転子と固定子の相対位置
がずれたり、平歯車との噛み合いを保持するため
の手段が必要となつたりする欠点があるのに対
し、本発明では、駒１４の軸方向に移動しないよ
うに拘束し、軸受ケーシング９を軸方向に移動さ
せるようにしているので、回転子１５と固定子１
６或いは平歯車１４ｇと２９の相対位置の関係に
は変化は生じない。 As explained above, according to the present invention, (i) since the mechanical actuation means for controlling the blade angle is provided on the rotating shaft, the blade angle controlling force does not act on the main thrust bearing of the rotating shaft; The thrust bearing can be downsized. (ii) Since the rotation of the bridge is converted into axial operation using a screw pair, even if the blade angle control shaft receives power from the fluid force applied to the blade, the bridge will not rotate due to the friction of the screw. No power is required to keep the blade angle constant except when controlling the blade angle. (iii) The bearing casing and the bridge are supported by the casing in the radial direction, and are supported by the main shaft only in the axial direction, so the transmission of rotational force to the bridge is good, and the rotating shaft is supported by the bearing. It is possible to move in the radial direction relative to the casing and the bridge, and no large loads are applied to the bearing due to centering errors or runout of the rotating shaft. (iv) Although errors occur in the axial relative positions of the bridge and the casing due to the manufacturing and assembly precision of the entire device, assembly is easy because the mechanism for transmitting the rotational force to the bridge has axial tolerance. (v) It is easy to detect the position of the operating shaft for controlling the blade angle. (vi) An invention related to an earlier application of the present invention in which a piece is moved in the axial direction based on a thrust ring restrained in the axial direction (Japanese Patent Application No. 58-215662, Japanese Patent Application No. 1-22474) (see), the piece equipped with the rotor and spur gear moves in the axial direction, so the relative position of the rotor and stator may shift, and a means to maintain meshing with the spur gear may be required. However, in the present invention, the pieces 14 are restrained from moving in the axial direction, and the bearing casing 9 is moved in the axial direction, so that the rotor 15 and stator 1
There is no change in the relative positional relationship between 6 or the spur gear 14g and 29.
第１図及び第２図は従来の可動翼操作機構の縦
断面図及び要部断面図、第３図及び第４図は本発
明の第１及び第２実施例を示す可動翼を備えた流
体機械の翼角制御装置の右半分の縦断面図、第５
図は第４図の要部横断面図である。
１……中空回転軸、２……翼角制御用操作軸、
８……上部スラストカラー、９……軸受ケーシン
グ、９ｓ……ねじ、１３……ケーシング、１２，
１９……ケーシング１３に固定された軸受、１４
……駒、１５，１６……電動機の回転子及び固定
子、１４ｇ，２９……平歯車、２１……下部スラ
ストカラー。
1 and 2 are longitudinal cross-sectional views and main part sectional views of a conventional movable blade operating mechanism, and FIGS. 3 and 4 are fluid fluid equipped with movable blades showing first and second embodiments of the present invention. Longitudinal cross-sectional view of the right half of the machine's blade angle control device, No. 5
The figure is a cross-sectional view of the main part of FIG. 4. 1...Hollow rotating shaft, 2...Operation shaft for blade angle control,
8... Upper thrust collar, 9... Bearing casing, 9s... Screw, 13... Casing, 12,
19...Bearing fixed to casing 13, 14
... Piece, 15, 16 ... Rotor and stator of electric motor, 14g, 29 ... Spur gear, 21 ... Lower thrust collar.
Claims (1)
角制御用操作軸２を軸方向に移動させることによ
り翼角度を制御する可動翼を備えた流体機械の翼
角制御装置において、ケーシング１３に固定され
た軸受１２，１９を介して回転軸１の周囲に、回
転可能で該ケーシング１３に対して軸方向に移動
可能に設けられ且つ回転軸と同芯のねじ１４Ｓを
備えた駒１４と、該駒１４を軸方向に支持し且つ
回転軸に固定された軸受２１と、ケーシング１３
に固定された軸受１２に支持され前記駒１４のね
じ１４Ｓに係合するねじ９Ｓを備え且つ軸受１０
ａ，１０ｂを介して翼角制御用操作軸に対して軸
方向に連結された、回転不能で軸方向移動自在な
軸受ケーシング９と、前記駒１４を回転附勢し且
つケーシングに支持された操作駆動手段を備えた
ことを特徴とする可動翼を備えた流体機械の翼角
制御装置。 ２ 前記駒１４の操作駆動手段を、該駒の外周に
固定した回転子１５と、該回転子と空〓をおいて
ケーシング１３に固設した固定子１１とからなる
電動機によつて構成した特許請求の範囲第１項記
載の可動翼を備えた流体機械の翼角制御装置。 ３ 前記駒１４の操作駆動手段を、該駒外周に設
けられ且つ回転軸１と同芯の歯車１４ｇと、該歯
車１４ｇとかみ合い且つ回転軸と平行な翼角操作
力入力軸２８上に設けられた歯車２９とから構成
した特許請求の範囲第１項記載の可動翼を備えた
流体機械の翼角制御装置。 ４ 前記駒１４を軸方向に支持し且つ回転軸１に
固定された軸受２１、及び軸受ケーシング９と翼
角制御用操作軸２を軸方向に直結する軸受１０
ａ，１０ｂを、何れも軸方向の力のみを支持し半
径方向には移動可能な構造とした特許請求の範囲
第１項ないし第３項の何れか１項に記載の可動翼
を備えた流体機械の翼角制御装置。[Claims] 1. Blade angle control of a fluid machine equipped with movable blades that controls the blade angle by moving in the axial direction a blade angle control operating shaft 2 provided so as to penetrate a hollow rotating shaft 1. In the device, a screw 14S is provided around the rotating shaft 1 through bearings 12 and 19 fixed to the casing 13, and is rotatably provided and movable in the axial direction with respect to the casing 13, and is concentric with the rotating shaft. A piece 14 provided therein, a bearing 21 that supports the piece 14 in the axial direction and is fixed to the rotating shaft, and a casing 13.
The screw 9S is supported by a bearing 12 fixed to a bearing 10 and is engaged with a screw 14S of the piece 14.
a non-rotatable but axially movable bearing casing 9 that is axially connected to the blade angle control operating shaft via a and 10b; A blade angle control device for a fluid machine equipped with movable blades, characterized by comprising a driving means. 2. A patent claim in which the operation drive means for the piece 14 is constituted by an electric motor comprising a rotor 15 fixed to the outer periphery of the piece, and a stator 11 fixed to the casing 13 with a space between the rotor and the air. A blade angle control device for a fluid machine comprising a movable blade according to item 1. 3. The operation drive means for the piece 14 is provided on a gear 14g provided on the outer periphery of the piece and coaxial with the rotating shaft 1, and on a blade angle operating force input shaft 28 meshing with the gear 14g and parallel to the rotating shaft. A blade angle control device for a fluid machine equipped with movable blades according to claim 1, comprising a gear 29 having a movable blade. 4 A bearing 21 that supports the piece 14 in the axial direction and is fixed to the rotating shaft 1, and a bearing 10 that directly connects the bearing casing 9 and the blade angle control operating shaft 2 in the axial direction.
A fluid equipped with movable blades according to any one of claims 1 to 3, in which both a and 10b have a structure that supports only axial force and is movable in the radial direction. Mechanical blade angle control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59021997A JPS60166762A (en) | 1984-02-10 | 1984-02-10 | Blade angle controller of fluid machine having movable blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59021997A JPS60166762A (en) | 1984-02-10 | 1984-02-10 | Blade angle controller of fluid machine having movable blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60166762A JPS60166762A (en) | 1985-08-30 |
| JPH0228712B2 true JPH0228712B2 (en) | 1990-06-26 |
Family
ID=12070655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59021997A Granted JPS60166762A (en) | 1984-02-10 | 1984-02-10 | Blade angle controller of fluid machine having movable blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60166762A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6422474A (en) * | 1987-07-15 | 1989-01-25 | Plasma Uerudoshiya Kk | Seam welding machine |
-
1984
- 1984-02-10 JP JP59021997A patent/JPS60166762A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60166762A (en) | 1985-08-30 |
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