JPS6337760B2 - - Google Patents
Info
- Publication number
- JPS6337760B2 JPS6337760B2 JP8999281A JP8999281A JPS6337760B2 JP S6337760 B2 JPS6337760 B2 JP S6337760B2 JP 8999281 A JP8999281 A JP 8999281A JP 8999281 A JP8999281 A JP 8999281A JP S6337760 B2 JPS6337760 B2 JP S6337760B2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- hub
- threaded portion
- ball screw
- pitch conversion
- 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
- 230000007246 mechanism Effects 0.000 claims description 39
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
- B63H3/02—Propeller-blade pitch changing actuated by control element coaxial with propeller shaft, e.g. the control element being rotary
- B63H3/04—Propeller-blade pitch changing actuated by control element coaxial with propeller shaft, e.g. the control element being rotary the control element being reciprocatable
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Hydraulic Turbines (AREA)
Description
【発明の詳細な説明】
本発明は回転翼の可変ピツチ機構に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a variable pitch mechanism for a rotor blade.
航空機用プロペラ、ヘリコプター用ロータ、船
舶用プロペラ、産業用フアン及び風車等の回転翼
はそのピツチを調節することにより、推力、吸収
トルク及び風量等の制限が容易になり、性能特性
を著しく向上させることが出来るものであり、こ
の目的のために従来より回転翼に対して可変ピツ
チ機構が利用されているが、従来の可変ピツチ機
構はカム、リンク又は歯車等を応用組合せた機械
運動機構が主に用いられている。従つて特に多ブ
レードプロペラの可変ピツチ機構は概して複雑な
機構となり、重量、スペースの問題を始め其の整
備性等種々の問題点がある。本発明は主要な可変
ピツチ機構部分にボールねじ機構を利用すること
によつて上記の問題点を解決すると共に上記のボ
ールねじ機構を特にブレードの遠心力及び曲げモ
ーメント等の負荷の影響を受けないよう配設し
て、構造が極めて簡単でしかも高強度、高精度且
つ作動性、耐用性の高い可変ピツチ機構を提供す
ることを目的とするものである。 By adjusting the pitch of the rotor blades of aircraft propellers, helicopter rotors, ship propellers, industrial fans, wind turbines, etc., it becomes easy to limit thrust, absorption torque, air volume, etc., and significantly improve performance characteristics. For this purpose, variable pitch mechanisms have traditionally been used for rotor blades, but conventional variable pitch mechanisms are mainly mechanical motion mechanisms that combine cams, links, or gears. It is used in Therefore, the variable pitch mechanism of a multi-blade propeller is generally a complicated mechanism, and there are various problems such as weight, space, and maintainability. The present invention solves the above problems by using a ball screw mechanism in the main variable pitch mechanism part, and the ball screw mechanism is not particularly affected by loads such as centrifugal force and bending moment of the blade. The object of the present invention is to provide a variable pitch mechanism having an extremely simple structure, high strength, high precision, high operability, and high durability.
以下図面に基づいて本発明の回転翼の可変ピツ
チ機構について詳細に説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The variable pitch mechanism for a rotor blade according to the present invention will be explained in detail below based on the drawings.
第１図は本発明の可変ピツチ機構の一実施例を
示す断面正面図、第２図は第１図のＡ−Ａ線断面
矢視部分側面図である。１はブレードで、其の基
部外周に配設したスラストベアリング１４を介し
て自由に回動し得るようハブ１３に支承されてい
る。２はボールねじ機構、３はボールねじ機構２
の雌ねじ該当部で、図示の実施の場合はハブ１３
の外周にブレード１のピツチ変換軸１′に同心的
に突設された円筒状内腔１３′の内周にねじ溝
３′を彫設することによつてハブ１３に一体的に
形成されている。４はボールねじ機構２の雄ねじ
該当部で其の外周には上記の雌ねじ該当部３のね
じ溝３′に対応するねじ溝４′が彫設されており、
上記の雌ねじ該当部３、雄ねじ該当部４及び両者
のねじ溝３′，４′で形成する螺状の空隙に挿入し
たボール５によつてボールねじ機構２が構成され
て、ブレード１のピツチ変換軸１′に同心的に配
設されている。６はロツドで、ブレード１のピツ
チ変換軸１′に同心的に配設されている。上記ロ
ツド６の一端は上記の雄ねじ該当部４にスラスト
ベアリング１５，１５′を介して回動自在に連結
されており、他端は従動ピン７を取付けたフオー
クエンドに形成されていて、該ピン７が、回転翼
の回転軸１６に同心的に且つアクチユエータ（図
示せず）を介して軸方向に往復運動し得るよう設
けた筒状カム本体８の外周に軸方向に突設された
カム突片９に刻設されたカム溝１０に嵌合して該
カム溝１０に案内されるよう設けられている。従
つて、ロツド６は筒状カム本体８の往復運動に追
随して軸方向に即ちブレード１のピツチ変換軸に
沿つて往復運動するよう設けられている。１１は
滑動スプライン機構でブレード１のピツチ変換軸
１′に同心的に配設されており、図示の実施例の
場合、滑動スプライン機構１１の軸は雄ねじ該当
部４に固着され穴はブレード１の基部に突設され
ている。 FIG. 1 is a cross-sectional front view showing one embodiment of the variable pitch mechanism of the present invention, and FIG. 2 is a partial side view of the cross-section taken along the line A--A in FIG. Reference numeral 1 denotes a blade, which is supported by a hub 13 so as to be freely rotatable via a thrust bearing 14 disposed on the outer periphery of its base. 2 is a ball screw mechanism, 3 is a ball screw mechanism 2
In the case of the illustrated implementation, the hub 13
It is formed integrally with the hub 13 by carving a threaded groove 3' on the inner periphery of a cylindrical bore 13' that protrudes concentrically with the pitch conversion shaft 1' of the blade 1 on the outer periphery of the blade 1. There is. Reference numeral 4 denotes a male thread corresponding part of the ball screw mechanism 2, and a thread groove 4' corresponding to the thread groove 3' of the above-mentioned female thread corresponding part 3 is carved on its outer periphery.
A ball screw mechanism 2 is constituted by the ball 5 inserted into the spiral gap formed by the female thread corresponding part 3, the male thread corresponding part 4, and the thread grooves 3' and 4' of both, and the pitch conversion of the blade 1 is performed. It is arranged concentrically with axis 1'. A rod 6 is arranged concentrically with the pitch conversion axis 1' of the blade 1. One end of the rod 6 is rotatably connected to the male threaded portion 4 via thrust bearings 15, 15', and the other end is formed into a fork end to which a driven pin 7 is attached. 7 is a cam protrusion protruding in the axial direction on the outer periphery of a cylindrical cam body 8 provided so as to be able to reciprocate in the axial direction concentrically with the rotating shaft 16 of the rotor blade and via an actuator (not shown). It is provided so as to fit into and be guided by a cam groove 10 carved in the piece 9. Therefore, the rod 6 is provided to follow the reciprocating movement of the cylindrical cam body 8 and reciprocate in the axial direction, that is, along the pitch conversion axis of the blade 1. Reference numeral 11 denotes a sliding spline mechanism, which is arranged concentrically with the pitch conversion shaft 1' of the blade 1. In the illustrated embodiment, the shaft of the sliding spline mechanism 11 is fixed to the male thread corresponding part 4, and the hole is connected to the pitch conversion shaft 1' of the blade 1. It is protruded from the base.
１２は圧縮ばねで、ブレード１の基端部と雄ね
じ該当部４との間に挿入配設されており、雄ねじ
該当部４、従つて同時にブレード１が其のフエザ
ー方向へ回動するような荷重を加えるよう付勢さ
れている。 Reference numeral 12 denotes a compression spring, which is inserted between the proximal end of the blade 1 and the male thread corresponding part 4, and applies a load that causes the male thread corresponding part 4 and therefore the blade 1 to rotate in the feather direction at the same time. is urged to add.
次に本発明の回転翼の可変ピツチ機構の作用に
ついて説明する。 Next, the operation of the rotor blade variable pitch mechanism of the present invention will be explained.
カム本体８をアクチユエータ（図示せず）によ
つて第２図の矢印に示す方向へ作動すれば、ロツ
ド６は其のフオークエンドに取付けられた従動ピ
ン７がカム溝１０に案内されることによつてカム
本体８の作動に追随して図示の矢印方向即ちブレ
ード１の先端方向へ雄ねじ該当部４と共に圧縮ば
ね１２の付勢力に抗して移動する。この時ボール
ねじ機構２の雌ねじ該当部３がハブ１３に一体的
に固着されているために、ロツド６に回動自在に
連結された雄ねじ該当部４は其の軸方向への移動
と同時に図示の矢印の方向へ回動し、従つて該雄
ねじ該当部４に滑動スプライン機構１１を介して
連結しているブレード１は雄ねじ該当部４と同時
に回動してピツチ変換の所期の目的を達成する。
上述の説明の場合と逆にカム本体８を図示の矢印
の反対方向に作動することによつてブレード１を
図示の矢印の反対方向にピツチ変換を行なうこと
が出来る。 When the cam body 8 is operated by an actuator (not shown) in the direction shown by the arrow in FIG. 2, the driven pin 7 attached to the fork end of the rod 6 will be guided into the cam groove 10. Therefore, following the operation of the cam body 8, the cam body 8 moves in the direction of the arrow shown in the figure, that is, in the direction of the tip of the blade 1, together with the male thread corresponding portion 4, against the biasing force of the compression spring 12. At this time, since the female thread corresponding part 3 of the ball screw mechanism 2 is integrally fixed to the hub 13, the male thread corresponding part 4, which is rotatably connected to the rod 6, moves in the axial direction at the same time as shown in the figure. Therefore, the blade 1, which is connected to the male thread corresponding part 4 via the sliding spline mechanism 11, rotates at the same time as the male thread corresponding part 4 to achieve the intended purpose of pitch conversion. do.
By operating the cam body 8 in the direction opposite to the direction of the arrow shown in the figure, the blade 1 can be pitch-converted in the direction opposite to the direction of the arrow shown in the figure, contrary to the case described above.
以上に説明するように本発明の回転翼の可変ピ
ツチ機構は機構の大部分を占める主要部をボール
ねじ機構によつて構成し、ボールねじ機構の持つ
ている高強度、高精度及び作動の円滑さ等の特性
をフルに活用することによつて、当初に記載した
構造が極めて簡単でしかも高強度、高精度且つ作
動の滑らかな可変ピツチ機構を備え併せてブレー
ドに懸る遠心力及び曲げモーメントの負荷をハブ
で受止めボールねじ機構に影響を及ぼさぬよう設
けることによつて作動性、信頼性及び耐用性の高
い可変ピツチ機構を提供すると言う所期の目的を
完全に達成するものである。又上記のような有用
な特性の他に、本発明の回転翼の可変ピツチ機構
は、アクチユエータの動力が失なわれるような事
故の場合圧縮ばね１２がフエザー方向へ作動する
ために回転翼のフエザリングが自動的に行なわれ
るもので、高い安全性を具備するものである。 As explained above, the variable pitch mechanism for rotor blades of the present invention has a ball screw mechanism as the main part that occupies most of the mechanism, and the ball screw mechanism has high strength, high precision, and smooth operation. By fully utilizing the characteristics of the blade, the structure described at the beginning is extremely simple, yet has a variable pitch mechanism with high strength, high precision, and smooth operation, and it also reduces the centrifugal force and bending moment exerted on the blade. By receiving the load at the hub so as not to affect the ball screw mechanism, the intended purpose of providing a variable pitch mechanism with high operability, reliability, and durability is completely achieved. In addition to the above-mentioned useful properties, the variable pitch mechanism of the rotor blade of the present invention reduces feathering of the rotor blade because the compression spring 12 operates in the feathering direction in the event of an accident in which actuator power is lost. This is done automatically and is highly secure.
尚以上の図示の実施例に基づく説明に於て、ロ
ツド６を作動するためのカム機構として回転翼の
回転軸１６に同心的に配設された筒状カム本体８
を軸方向に往復運動するよう設けたカム機構を使
用しているが、ロツド６を其の軸方向に往復運動
させるために例えば回転翼の回転軸１６に同心的
に配設して回動し得るよう設けたカムプレートを
使用する等の変更は自由である。 In the above explanation based on the illustrated embodiment, a cylindrical cam body 8 is used as a cam mechanism for actuating the rod 6, which is disposed concentrically with the rotating shaft 16 of the rotor blade.
In order to reciprocate the rod 6 in the axial direction, for example, a cam mechanism is used, which is arranged concentrically with the rotating shaft 16 of the rotor blade and rotated. You are free to make changes such as using a cam plate provided to obtain the desired results.
第１図は本発明の回転翼の可変ピツチ機構の一
実施例を示す断面正面図、第２図は第１図のＡ−
Ａ線断面矢視部分側面図である。以下図面中の符
号の説明。
１：ブレード、１′：ブレード１のピツチ変換
軸、２：ボールねじ機構、３：雌ねじ該当部、
３′：雌ねじ該当部３のねじ溝、４：雄ねじ該当
部、４′：雄ねじ該当部４のねじ溝、５：ボール、
６：ロツド、７：従動ピン、８：筒状カム本体、
９：カム突片、１０：カム溝、１１：滑動スプラ
イン機構、１２：圧縮ばね、１３：ハブ、１
３′：円筒状内腔、１４：スラストベアリング、
１５，１５′：スラストベアリング、１６：回転
翼の回転軸。
FIG. 1 is a sectional front view showing an embodiment of the variable pitch mechanism for a rotor blade according to the present invention, and FIG.
FIG. 3 is a partial side view taken along the line A and viewed from the direction of arrows. Below is an explanation of the symbols in the drawings. 1: Blade, 1': Pitch conversion axis of blade 1, 2: Ball screw mechanism, 3: Female thread corresponding part,
3': Thread groove of female thread corresponding part 3, 4: Male thread corresponding part, 4': Thread groove of male thread corresponding part 4, 5: Ball,
6: Rod, 7: Follower pin, 8: Cylindrical cam body,
9: Cam projection piece, 10: Cam groove, 11: Sliding spline mechanism, 12: Compression spring, 13: Hub, 1
3': Cylindrical bore, 14: Thrust bearing,
15, 15': Thrust bearing, 16: Rotating shaft of rotor blade.
Claims (1)
にハブに装着されたブレードと、ボールねじ機構
と、ハブの中心軸に同心的に配設されたカム機構
によつて自軸に沿つて進退するよう設けたロツド
とを上記のピツチ変換軸と同心的に順次縦列に配
置し、上記ボールねじ機構の雌ねじ該当部をハブ
に固定し、該雌ねじ部に対して回動自由な雄ねじ
部を上記ロツドにベアリングを介して回動可能に
連結すると共に滑動スプライン機構を介してブレ
ードに対しピツチ変換軸に沿つて進退可能に連結
し且つブレード基端部と該雄ねじ該当部との間に
圧縮ばねを挿入配設したことを特徴とする回転翼
の可変ピツチ機構。1 A blade attached to the hub so that it can freely rotate around the pitch conversion axis, a ball screw mechanism, and a cam mechanism arranged concentrically to the central axis of the hub, The rods provided to move forward and backward are arranged in series concentrically with the pitch conversion shaft, the female threaded portion of the ball screw mechanism is fixed to the hub, and the male threaded portion that is freely rotatable with respect to the female threaded portion is fixed. The rod is rotatably connected to the rod via a bearing, and is connected to the blade through a sliding spline mechanism so as to be movable back and forth along the pitch conversion axis, and a compression spring is provided between the blade base end and the male threaded portion. A variable pitch mechanism for a rotor blade, characterized in that a rotor blade is inserted and arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8999281A JPS57205298A (en) | 1981-06-10 | 1981-06-10 | Variable pitch mechanism for rotating blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8999281A JPS57205298A (en) | 1981-06-10 | 1981-06-10 | Variable pitch mechanism for rotating blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57205298A JPS57205298A (en) | 1982-12-16 |
| JPS6337760B2 true JPS6337760B2 (en) | 1988-07-27 |
Family
ID=13986111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8999281A Granted JPS57205298A (en) | 1981-06-10 | 1981-06-10 | Variable pitch mechanism for rotating blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57205298A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101314814B1 (en) * | 2010-11-23 | 2013-10-04 | 삼성중공업 주식회사 | Tunnel thruster |
-
1981
- 1981-06-10 JP JP8999281A patent/JPS57205298A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57205298A (en) | 1982-12-16 |
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