JPS6329119B2 - - Google Patents
Info
- Publication number
- JPS6329119B2 JPS6329119B2 JP59157213A JP15721384A JPS6329119B2 JP S6329119 B2 JPS6329119 B2 JP S6329119B2 JP 59157213 A JP59157213 A JP 59157213A JP 15721384 A JP15721384 A JP 15721384A JP S6329119 B2 JPS6329119 B2 JP S6329119B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure oil
- oil introduction
- rotating shaft
- casing
- blade angle
- 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
- 239000012530 fluid Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 51
- 239000010720 hydraulic oil Substances 0.000 description 5
- 241000239290 Araneae Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010724 circulating oil Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- Hydraulic Turbines (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、中空回転軸を貫通する翼角制御用操
作軸を油圧を利用して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
の翼角制御機構に関し、特に翼角を変えるために
使用する作動油を回転軸中に導入するための圧油
導入装置に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention controls the blade angle by moving a blade angle control operating shaft passing through a hollow rotating shaft in the axial direction using hydraulic pressure. The present invention relates to a blade angle control mechanism for a fluid machine equipped with movable blades, and particularly relates to a pressure oil introduction device for introducing hydraulic oil used to change the blade angle into a rotating shaft.
（従来の技術）
従来の、この種翼角を変えるために使用する作
動油を回転軸中に導入するようにした翼角制御機
構は、第２Ａ図及び第２Ｂ図の縦断面図に示すよ
うに、電動機１の軸２に軸継手を兼ねたサーボシ
リンダ３を介して直結された中空状の回転軸４の
先端に、可動翼５が取付けられ、該可動翼５は、
アームａとリンクｌを介して、中空回転軸４を貫
通して設けられたテンシヨンロツド（操作軸）６
の先端に取付けられたスパイダ６ａに連結され、
また該テンシヨンロツド６の上方基部は、サーボ
シリンダ３に収納されたサーボピストン７に連結
されている。(Prior Art) A conventional blade angle control mechanism of this type in which hydraulic oil used to change the blade angle is introduced into the rotating shaft is shown in longitudinal cross-sectional views in FIGS. 2A and 2B. A movable blade 5 is attached to the tip of a hollow rotating shaft 4 that is directly connected to the shaft 2 of the electric motor 1 via a servo cylinder 3 that also serves as a shaft coupling.
A tension rod (operating shaft) 6 is provided through the hollow rotating shaft 4 via the arm a and the link l.
connected to the spider 6a attached to the tip of the
The upper base of the tension rod 6 is connected to a servo piston 7 housed in the servo cylinder 3.
上記テンシヨンロツド６の上方の中心部には、
サーボピストン７の上方室に開口する導孔８ａが
穿設され、該導孔８ａの下部は、回転軸４を取巻
いて設けられ且つ基礎９にボルトで固定された圧
油導入ケーシング１０の導孔１０ａに連通されて
いる。また、サーボピストン７の下方室は、ブツ
シユ４ａに設けられた切欠き溝４ｂと、テンシヨ
ンロツド６の周面に形成された環状溝８ｂを経
て、圧油導入ケーシング１０の導孔１０ｂに連通
されている。なお、導孔１０ａと１０ｂは、別々
に外部にとり出される。そしてこれらの導孔１０
ａ及び１０ｂは、図示していない外部の油圧回路
の途中に設けられた四方切換弁を経て、圧油源又
はタンクに連通されている。なお、図中、ｂは電
動機軸２を支持するラジアル及びスラスト軸受を
示す。 In the center above the tension rod 6,
A guide hole 8a that opens into the upper chamber of the servo piston 7 is bored, and the lower part of the guide hole 8a is connected to the guide hole 8a of the pressure oil introduction casing 10, which is provided around the rotating shaft 4 and fixed to the foundation 9 with bolts. It communicates with the hole 10a. Further, the lower chamber of the servo piston 7 is communicated with the guide hole 10b of the pressure oil introduction casing 10 through a notch groove 4b provided in the bush 4a and an annular groove 8b formed in the circumferential surface of the tension rod 6. There is. Note that the guide holes 10a and 10b are taken out separately. And these guide holes 10
a and 10b are communicated with a pressure oil source or tank via a four-way switching valve provided in the middle of an external hydraulic circuit (not shown). Note that in the figure, b indicates a radial and thrust bearing that supports the motor shaft 2.
電動機１が作動されると、電動機軸２、サーボ
シリンダ３を介して中空回転軸４がテンシヨンロ
ツド６と一体になつて回転駆動される。そして可
動翼５の翼角を変える必要が生じたときは、外部
の油圧回路に設けられた四方切換弁を切換え、圧
油導入ケーシング１０の圧油導孔１０ａ，１０ｂ
の何れかからテンシヨンロツド６の導孔８ａ又は
環状溝８ｂを経て、サーボシリンダ３の一方の室
に圧油が導入され、また他方の室から他方の油路
を経て油が排除され、上記圧油がサーボピストン
７に働いてテンシヨンロツド６を上方又は下方に
移動させ、それに伴い、スパイダ６ａ、リンク
ｌ、アームａを介して可動翼５の翼角度が変更さ
れる。 When the electric motor 1 is operated, the hollow rotary shaft 4 is rotated integrally with the tension rod 6 via the electric motor shaft 2 and the servo cylinder 3. When it becomes necessary to change the blade angle of the movable blade 5, the four-way switching valve provided in the external hydraulic circuit is switched, and the pressure oil guide holes 10a, 10b of the pressure oil introduction casing 10 are changed.
Pressure oil is introduced into one chamber of the servo cylinder 3 from one of the chambers through the guide hole 8a or the annular groove 8b of the tension rod 6, and the oil is removed from the other chamber through the other oil path. acts on the servo piston 7 to move the tension rod 6 upward or downward, and accordingly, the blade angle of the movable blade 5 is changed via the spider 6a, the link 1, and the arm a.
（発明が解決しようとする問題点）
上記した従来の翼角制御機構においては、圧油
導入ケーシング１０はボルトで基礎１０等の支持
部に完全に結合されており、該圧油導入ケーシン
グ１０の円筒嵌合面内で回転軸４が円滑に回転で
きるようにするために、回転軸４の外周面と圧油
導入ケーシング１０の円筒内面との隙間は、図示
されていないが、ポンプの回転軸を径方向に支持
する軸受で圧油導入ケーシングと羽根ボス間に通
常２個使用されているポンプ軸受の隙間より大き
くしなければならない。ところが、該圧油導入ケ
ーシングの隙間は圧油の導通系路の一部を構成し
ており、また一般に、この隙間より漏出する作動
油の量は隙間の３乗にほぼ比例するため、作動油
の循環油量を非常に増やさなければならない結果
となる。(Problems to be Solved by the Invention) In the conventional blade angle control mechanism described above, the pressure oil introduction casing 10 is completely connected to a supporting part such as the foundation 10 with bolts. In order to allow the rotary shaft 4 to rotate smoothly within the cylindrical fitting surface, a gap is formed between the outer peripheral surface of the rotary shaft 4 and the cylindrical inner surface of the pressure oil introduction casing 10, although it is not shown in the drawings. The gap must be larger than the gap between two pump bearings, which are normally used between the pressure oil introduction casing and the vane boss. However, the gap in the pressure oil introduction casing constitutes a part of the pressure oil conduction path, and generally, the amount of hydraulic oil leaking from this gap is approximately proportional to the cube of the gap. As a result, the amount of circulating oil must be significantly increased.
そのため、給油装置も大型となつて高価とな
り、また、圧油導入ケーシングが固定されている
ため、組立の際にも圧油導入ケーシング１０と回
転軸４との芯出しを精度よく行なう必要があり、
そのため、多くの作業時間を必要とするなどの欠
点があつた。 Therefore, the oil supply device becomes large and expensive, and since the pressure oil introduction casing is fixed, it is necessary to accurately align the pressure oil introduction casing 10 and the rotating shaft 4 during assembly. ,
Therefore, there were drawbacks such as requiring a lot of work time.
本発明は、上記した従来技術の欠点を除去し、
回転軸と圧油導入ケーシングとの嵌合面の隙間を
狭くすることにある。 The present invention eliminates the drawbacks of the prior art described above,
The objective is to narrow the gap between the fitting surface between the rotating shaft and the pressure oil introduction casing.
（問題点を解決するための手段）
本発明は、油圧を利用して翼角を制御する可動
翼を備えた流体機械の回転軸の外側に、圧油導孔
を有する静止された圧油導入ケーシングを、隙間
を狭くして嵌合して設け、該圧油導入ケーシング
の下面に、例えば基礎側の据付面に植設されたノ
ツクピンの径より大きい穴を設けるなどして、該
圧油導入ケーシングを、基礎に対して、回転方向
には固定されるが半径方向には回転軸の振動に合
わせて自由に摺動できるように遊隙を設けて取付
けたことを特徴としている。(Means for Solving the Problems) The present invention provides a stationary pressurized oil introduction hole having a pressurized oil guide hole on the outside of the rotating shaft of a fluid machine equipped with movable blades that control the blade angle using hydraulic pressure. The pressure oil is introduced by fitting the casings with a narrow gap, and providing a hole in the lower surface of the pressure oil introduction casing that is larger than the diameter of the dowel pin installed on the installation surface on the foundation side, for example. The casing is fixed to the foundation in the rotational direction, but is attached with a clearance in the radial direction so that it can freely slide in accordance with the vibrations of the rotating shaft.
（作用）
本発明は、上記のように、静止された圧油導入
ケーシングが回転軸に対して回転方向には固定さ
れるが径方向には自由に摺動できるように構成さ
れているので、ポンプ等の回転機械の駆動中、回
転軸が振動しても、回転軸の外側に嵌合されてい
る回転方向に静止した圧油導入ケーシングは、回
転軸の振動によく追随して変位できるので、両者
の嵌合面の間隙を最小限度に維持することがで
き、従つて、該隙間を、回転軸を半径方向に支持
している軸受の隙間より小さくすることができ
る。(Function) As described above, the present invention is configured such that the stationary pressure oil introduction casing is fixed in the rotational direction with respect to the rotating shaft but can freely slide in the radial direction. Even if the rotating shaft vibrates while driving a rotating machine such as a pump, the pressure oil introduction casing, which is fitted on the outside of the rotating shaft and remains stationary in the direction of rotation, can be displaced to closely follow the vibrations of the rotating shaft. , the gap between the two fitting surfaces can be maintained to a minimum, and therefore, the gap can be made smaller than the gap of the bearing that supports the rotating shaft in the radial direction.
また可動翼の翼角度を制御する際には、上記の
ように構成された圧油導入ケーシングの圧油導孔
より、圧油が前記隙間を経て回転軸内へ送り込ま
れ、次いで、翼角操作用のテンシヨンロツドに穿
設された導孔を通つてサーボシリンダ内に送油さ
れ、サーボピストンを作動させて翼角度が制御さ
れることは従来のものと変りはないが、上記のよ
うに回転軸と静止圧油導入ケーシングとの嵌合面
の隙間が狭く保持されるので、ここからの油の漏
れは少くて済む。 In addition, when controlling the blade angle of the movable blade, pressure oil is fed into the rotating shaft through the gap from the pressure oil guide hole of the pressure oil introduction casing configured as described above, and then the blade angle is controlled. Oil is sent into the servo cylinder through a hole drilled in the tension rod, and the blade angle is controlled by operating the servo piston, which is the same as in the previous model, but as mentioned above, the rotation axis Since the gap between the fitting surface between the static pressure oil introduction casing and the static pressure oil introduction casing is kept narrow, there is little oil leakage therefrom.
（実施例） 次に、本発明の実施例を図面と共に説明する。(Example) Next, embodiments of the present invention will be described with reference to the drawings.
第１図は、本発明の一実施例を示す圧油導入装
置を備えた翼角制御機構の要部断面図であつて、
この図に示す符号のうち第２図に示す符号と同一
のものは、同一ないし同類のものを示すものとす
る。 FIG. 1 is a sectional view of a main part of a blade angle control mechanism equipped with a pressure oil introduction device showing one embodiment of the present invention,
Among the symbols shown in this figure, the same ones as those shown in FIG. 2 indicate the same or similar parts.
図において、電動機１の軸２にサーボシリンダ
３を介して中空回転軸４が連結され、該中空回転
軸４を貫通して延びる翼角度を操作するテンシヨ
ンロツド６の上端には、サーボピストン７が固定
され、該サーボピストン７を油圧駆動する圧油
は、回転軸４の外側に嵌合して設けられた圧油導
入ケーシング１０を介して送り込まれるように構
成されていることは従来のものと変りはない。 In the figure, a hollow rotating shaft 4 is connected to the shaft 2 of an electric motor 1 via a servo cylinder 3, and a servo piston 7 is fixed to the upper end of a tension rod 6 that extends through the hollow rotating shaft 4 and operates the blade angle. This differs from the conventional structure in that the pressure oil for hydraulically driving the servo piston 7 is sent through a pressure oil introduction casing 10 fitted to the outside of the rotating shaft 4. There isn't.
そしてこの実施例では、回転軸４と圧油導入ケ
ーシング１０との嵌合面の隙間を特に小さくする
と共に、基礎９上に形成された据付台１１にはノ
ツクピン１２が植設され、圧油導入ケーシング１
０の裏面には、上記ノツクピン１２に嵌まり込み
且つノツクピン１２の径より大きい内径を有する
穴１３が穿設されている。また、該圧油導入ケー
シング１０に対する据付台１１の上面（据付面）
には、半径方向の摩擦を極力小さくするために弗
素樹脂等の減摩摺動材１４が貼付されている。な
お、この摺動材１４の代りに、鋼球等を用いて摺
動させることもできる。 In this embodiment, the gap between the mating surfaces of the rotating shaft 4 and the pressure oil introduction casing 10 is made particularly small, and a knock pin 12 is installed in the installation base 11 formed on the foundation 9 to introduce the pressure oil. Casing 1
A hole 13 that fits into the knock pin 12 and has an inner diameter larger than the diameter of the knock pin 12 is bored in the back surface of the bolt. In addition, the upper surface (installation surface) of the installation base 11 with respect to the pressure oil introduction casing 10
An anti-friction sliding material 14 such as fluororesin is pasted to the radial direction to minimize friction in the radial direction. Note that instead of this sliding member 14, a steel ball or the like may be used for sliding.
次に作用について説明すると、電動機１が駆動
され回転軸４が回転している間、該回転軸４は、
静止した圧油導入ケーシング１０内で狭い隙間を
保つて回転しているが、該圧油導入ケーシング１
０は基礎９に対し、回転方向には固定されるが半
径方向にはノツクピン１２と穴１３の遊びの分だ
け自由に摺動できるので、たとえ回転軸４が振動
によつて横振れしても、それに嵌合する圧油導入
ケーシング１０は回転軸４と一緒になつて変位す
る。従つて、両者の嵌合面の隙間が狭くとも、こ
こで軸受作用することはないので、摺動部が摩耗
して隙間が増大する恐れもなく、この隙間を必要
最小限に維持できる。 Next, to explain the operation, while the electric motor 1 is driven and the rotating shaft 4 is rotating, the rotating shaft 4 is
The pressure oil introduction casing 1 rotates with a narrow gap maintained within the stationary pressure oil introduction casing 10.
0 is fixed to the foundation 9 in the rotational direction, but can slide freely in the radial direction by the amount of play between the dowel pin 12 and the hole 13, so even if the rotating shaft 4 oscillates laterally due to vibration, , the pressure oil introduction casing 10 fitted therein is displaced together with the rotating shaft 4. Therefore, even if the gap between the fitting surfaces of the two is narrow, there is no bearing action there, so there is no fear that the sliding portion will wear out and the gap will increase, and the gap can be maintained at the minimum necessary level.
従つてこの実施例によれば、上記の隙間を狭く
保持できるので、翼角度制御のために導孔１０
ａ，１０ｂより送り込まれ又排出される圧油は、
前記嵌合面での油漏れが防止され、作動油の循環
量を著しく減少できる。また圧油導入ケーシング
１０を回転軸４に対して芯出しをする必要もない
ので、組立作業時間も短縮できる。 Therefore, according to this embodiment, since the above-mentioned gap can be kept narrow, the guide hole 10 can be kept narrow for controlling the blade angle.
The pressure oil sent and discharged from a and 10b is
Oil leakage at the fitting surface is prevented, and the amount of hydraulic oil circulated can be significantly reduced. Further, since there is no need to center the pressure oil introduction casing 10 with respect to the rotating shaft 4, the assembly work time can also be shortened.
なお、前記実施例においては、主としてポンプ
について説明したが、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 addition, in the said Example, although the pump was mainly demonstrated, it is also possible to apply this invention to a fluid machine other than a pump, for example, a water turbine.
また、静止体である圧油導入ケーシングの取付
け手段として、前記実施例ではノツクピン１２を
基礎側にまた穴１３を静止している圧油導入ケー
シング側にそれぞれ設けた例について説明した
が、これらのノツクピンと穴をそれぞれ実施例と
は逆に設けることも可能であるなど、種々の設計
変更が可能である。 Furthermore, as means for attaching the pressure oil introduction casing which is a stationary body, in the above embodiment, an example was explained in which the knock pin 12 was provided on the foundation side and the hole 13 was provided on the side of the pressure oil introduction casing which was stationary. Various design changes are possible, such as the possibility of providing the knock pins and holes in the opposite manner to the embodiments.
（発明の効果）
以上説明したように、本発明によれば、回転軸
内に圧油を導入するための静止している圧油導入
ケーシングを、回転方向には固定するが半径方向
には自由に摺動させるように構成しているので、
次のような効果が奏される。(Effects of the Invention) As explained above, according to the present invention, the stationary pressure oil introduction casing for introducing pressure oil into the rotating shaft is fixed in the rotational direction but free in the radial direction. Since it is configured to slide on the
The following effects are produced.
(i) 摺動部の隙間を小さくすることができるた
め、作動油の循環油量を減少し、給油装置の価
格を大幅に低減できる。(i) Since the gap between the sliding parts can be reduced, the amount of circulating hydraulic oil can be reduced, and the price of the oil supply system can be significantly reduced.
(ii) 圧油導入装置の芯出しが不要となり、組立て
に要する作業時間が短縮できる。(ii) There is no need to center the pressure oil introduction device, and the work time required for assembly can be shortened.
第１図は本発明の一実施例を示す圧油導入装置
を備えた翼角制御機構の断面図、第２Ａ図及び第
２Ｂ図は従来の可動翼を備えたポンプの油圧によ
る翼角制御機構の断面図である。
３…サーボシリンダ、４…回転軸、６…テンシ
ヨンロツド、７…サーボピストン、９…基礎、１
０…圧油導入ケーシング、１１…据付台、１２…
ノツクピン、１３…穴。
FIG. 1 is a sectional view of a blade angle control mechanism equipped with a pressure oil introduction device showing an embodiment of the present invention, and FIGS. 2A and 2B are a conventional hydraulic blade angle control mechanism of a pump equipped with movable blades. FIG. 3... Servo cylinder, 4... Rotating shaft, 6... Tension rod, 7... Servo piston, 9... Foundation, 1
0... Pressure oil introduction casing, 11... Installation stand, 12...
Knot pin, 13...hole.
Claims (1)
た流体機械の回転軸内に圧油を導入する圧油導入
装置において、前記回転軸の外側に、圧油導孔を
有する静止された圧油導入ケーシングを隙間を狭
くして嵌合して設け、該圧油導入ケーシングを、
基礎に対して、回転方向には固定されるが半径方
向には回転軸の振動に合わせて自由に摺動できる
遊隙を設けて取付け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機構の圧油導入装置。 ２ 前記圧油導入ケーシングの下面には、基礎側
の据付面に植設されたノツクピンの径より大きい
穴を設け、該ピンとの間に前記遊隙を構成した特
許請求の範囲第１項記載の可動翼を備えた流体機
械の翼角制御機構の圧油導入装置。 ３ 前記圧油導入ケーシングの裏面に、半径方向
の摩擦を極力少くする弗素樹脂等の摺動材を貼付
した特許請求の範囲第２項記載の可動翼を備えた
流体機械の翼角制御機構の圧油導入装置。 ４ 前記圧油導入ケーシングの下面と基礎側据付
面との間に、鋼球等のボールを介在させた特許請
求の範囲第２項記載の可動翼を備えた流体機械の
翼角制御機構の圧油導入装置。[Scope of Claims] 1. In a pressure oil introduction device for introducing pressure oil into the rotating shaft of a fluid machine equipped with movable blades that control the blade angle using hydraulic pressure, a pressure oil introducing device is provided outside the rotating shaft. A stationary pressure oil introduction casing having a hole is provided by fitting with a narrowed gap, and the pressure oil introduction casing is fitted with a narrow gap.
A blade of a fluid machine equipped with a movable blade that is fixed to a foundation in the rotational direction but with a clearance that allows it to slide freely in the radial direction in accordance with the vibrations of the rotating shaft. Pressure oil introduction device for angle control mechanism. 2. A hole larger than the diameter of a dowel pin installed in the installation surface on the foundation side is provided in the lower surface of the pressure oil introduction casing, and the clearance is formed between the hole and the dowel pin. A pressure oil introduction device for the blade angle control mechanism of a fluid machine with movable blades. 3. A blade angle control mechanism for a fluid machine equipped with movable blades as set forth in claim 2, wherein a sliding material such as fluororesin that reduces radial friction as much as possible is attached to the back surface of the pressure oil introduction casing. Pressure oil introduction device. 4. The pressure of the blade angle control mechanism of a fluid machine equipped with movable blades according to claim 2, in which a ball such as a steel ball is interposed between the lower surface of the pressure oil introduction casing and the foundation side installation surface. Oil introduction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15721384A JPS6138197A (en) | 1984-07-30 | 1984-07-30 | Pressure oil supply device of blade angle control mechanism for hydraulic machine having variable blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15721384A JPS6138197A (en) | 1984-07-30 | 1984-07-30 | Pressure oil supply device of blade angle control mechanism for hydraulic machine having variable blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6138197A JPS6138197A (en) | 1986-02-24 |
| JPS6329119B2 true JPS6329119B2 (en) | 1988-06-10 |
Family
ID=15644681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15721384A Granted JPS6138197A (en) | 1984-07-30 | 1984-07-30 | Pressure oil supply device of blade angle control mechanism for hydraulic machine having variable blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6138197A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04101519U (en) * | 1991-02-04 | 1992-09-02 | 泰江 堤 | glasses, sunglasses |
| JPH0688948A (en) * | 1992-06-12 | 1994-03-29 | Min S Lee | Rim of spectacles |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0587320U (en) * | 1991-01-28 | 1993-11-26 | 株式会社竹中製作所 | Resin-mediated washer-integrated bolt and nut, and fastening device including them |
-
1984
- 1984-07-30 JP JP15721384A patent/JPS6138197A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04101519U (en) * | 1991-02-04 | 1992-09-02 | 泰江 堤 | glasses, sunglasses |
| JPH0688948A (en) * | 1992-06-12 | 1994-03-29 | Min S Lee | Rim of spectacles |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6138197A (en) | 1986-02-24 |
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