JP2821203B2 - Operating method of fluid coupling - Google Patents
Operating method of fluid couplingInfo
- Publication number
- JP2821203B2 JP2821203B2 JP27586589A JP27586589A JP2821203B2 JP 2821203 B2 JP2821203 B2 JP 2821203B2 JP 27586589 A JP27586589 A JP 27586589A JP 27586589 A JP27586589 A JP 27586589A JP 2821203 B2 JP2821203 B2 JP 2821203B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- oil
- working chamber
- speed operation
- fluid coupling
- 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 - Fee Related
Links
Landscapes
- Structure Of Transmissions (AREA)
- Operation Control Of Excavators (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、排水ポンプ等に使用する流体継手の運転方
法に係り、特に原動機は一定速度で運転し、流体継手で
ポンプ速度を高速と低速の２段階に変速する流体継手に
関する。Description: BACKGROUND OF THE INVENTION The present invention relates to a method of operating a fluid coupling used for a drainage pump or the like, and more particularly, to a method in which a prime mover is operated at a constant speed, and a pump speed is increased and decreased by the fluid coupling. A fluid coupling that shifts in two stages.
従来の技術を第３図に示す。従来、作動室内の油を排
出する回転ケーシングの外周に取付けた排出ノズル34
は、固定型であった。高速運転時は、バルブ31を開けて
バルブ32を閉じる。低速運転時は、バルブ32を開けてバ
ルブ31を閉じていた。バルブ２個の回路には、可変オリ
フィス33が設けられており、このオリフィスを調整して
作動室へ入る油量を加減し、作動室内に溜まる油量を加
減していた。FIG. 3 shows a conventional technique. Conventionally, a discharge nozzle 34 attached to the outer periphery of a rotating casing that discharges oil in the working chamber
Was of the fixed type. During high-speed operation, the valve 31 is opened and the valve 32 is closed. During low-speed operation, the valve 32 was opened and the valve 31 was closed. A variable orifice 33 is provided in the circuit of the two valves, and the orifice is adjusted to adjust the amount of oil entering the working chamber and to adjust the amount of oil accumulated in the working chamber.
上記従来技術に記載のものは、作動室への供給油量を
増減して、流体継手出力回転数を調整するものである。
そのため、流体継手でポンプを変速するときの損失特性
と供給油量の関係が逆になり、低速側の設定できる回転
数範囲が狭くなるという不具合を生じていた。The above-mentioned prior art adjusts the output rotational speed of the fluid coupling by increasing or decreasing the amount of oil supplied to the working chamber.
For this reason, the relationship between the loss characteristic and the supply oil amount when the pump is shifted by the fluid coupling is reversed, and a problem has occurred in which the settable rotational speed range on the low speed side is narrowed.
本発明の目的は、全範囲で任意の点に回転数を設定で
きるようにすることにある。An object of the present invention is to make it possible to set the rotation speed at any point in the entire range.
上記目的を達成するために、油ポンプで圧送される油
を２系統に分割して流し、各系統はバルブおよび遠心力
バルブを介して作動室に導かれている、排水ポンプ等に
使用される高速運転と低速運転の２段切換えが可能な流
体継手の運転方法において、少なくとも一方の系統の前
記バルブと前記遠心力バルブ間から分岐した作動室へ油
供給回路から作動室へ油を導くとともに、低速運転時に
は一方のバルブを閉じてその系統の遠心力バルブを開け
て動作室内から油を排出可能にし、高速運転時には２系
統の各バルブを開にして両系統の遠心力バルブを共に閉
じて作動室からの排油を不可能にし、低速運転時に開と
なるバルブの下流に設けた可変絞りにより、高速運転と
低速運転のいずれにおいても流量を微調整するものであ
る。In order to achieve the above object, oil pumped by an oil pump is divided into two systems, each of which is used for a drain pump or the like, which is guided to a working chamber through a valve and a centrifugal valve. In a method of operating a fluid coupling capable of switching between two stages of high-speed operation and low-speed operation, while guiding oil from the oil supply circuit to the working chamber to the working chamber branched from between the valve and the centrifugal valve of at least one system, At low speed operation, one valve is closed and the centrifugal force valve of the system is opened to allow oil to be drained from the operation chamber. At high speed operation, each valve of the two systems is opened and both systems are closed. The oil flow from the chamber is made impossible, and the flow rate is finely adjusted in both the high-speed operation and the low-speed operation by a variable throttle provided downstream of the valve that is opened during the low-speed operation.
第１図に本発明に係る流体継手の給油系統を、第２図
に遠心力バルブの構造を示す。第１図において、高速運
転時は、バルブ２とバルブ３の双方を開ける。ポンプ１
から圧送された油は、バルブ２またはバルブ３を経て、
遠心力バルブの背圧回路９、10へ流入する。この結果、
作動室と外部との油の流通を開閉する遠心力バルブ６が
閉じられ、作動室内からの排油を零にする。一方、バル
ブ２またはバルブ３を経た油の一部は、作動油給油回路
11、12を通って作動室内に流入する。その結果、作動室
内には油が溜められる。FIG. 1 shows an oil supply system of a fluid coupling according to the present invention, and FIG. 2 shows a structure of a centrifugal valve. In FIG. 1, during high-speed operation, both the valve 2 and the valve 3 are opened. Pump 1
Is pumped through the valve 2 or valve 3,
It flows into the back pressure circuits 9 and 10 of the centrifugal valve. As a result,
The centrifugal valve 6 that opens and closes the flow of oil between the working chamber and the outside is closed, and the drainage of oil from the working chamber is reduced to zero. On the other hand, part of the oil passing through the valve 2 or the valve 3 is supplied to the hydraulic oil supply circuit.
It flows into the working chamber through 11 and 12. As a result, oil is stored in the working chamber.
低速運転時には、バルブ２を閉じると共にバルブ３は
開いたままにする。バルブ２が閉じているので、背圧回
路10には油が供給されず、背圧回路10側の油の流通は阻
止される。そして、遠心力バルブには背圧がかからない
ので、排油を行えるように遠心力バルブが開く。これに
より、作動室内に溜まった油は、常時一定量ずつ排出さ
れ、作動室内に溜まる油量が制限され、回転数が最大回
転数より低下する。この時、可変絞りを油量の微調整に
使用する。During low-speed operation, the valve 2 is closed and the valve 3 is kept open. Since the valve 2 is closed, no oil is supplied to the back pressure circuit 10, and the flow of oil on the back pressure circuit 10 side is blocked. Then, since no back pressure is applied to the centrifugal valve, the centrifugal valve is opened so that oil can be drained. As a result, the oil accumulated in the working chamber is constantly discharged at a constant rate, the amount of oil accumulated in the working chamber is limited, and the number of revolutions becomes lower than the maximum number of revolutions. At this time, the variable throttle is used for fine adjustment of the oil amount.
以下、本発明の一実施例を第１図、第２図により説明
する。原動機より伝えられたトルクは入力軸７に伝えら
れ、作動室内に供給された油を介して出力軸８にトルク
を伝える。出力軸８に伝えられるトルクの大きさは、作
動室内に溜まる油量により変化する。An embodiment of the present invention will be described below with reference to FIGS. The torque transmitted from the prime mover is transmitted to the input shaft 7, and transmits the torque to the output shaft 8 via the oil supplied into the working chamber. The magnitude of the torque transmitted to the output shaft 8 changes depending on the amount of oil accumulated in the working chamber.
油ポンプ１により圧送された油は、バルブ２またはバ
ルブ３を通り、遠心力バルブへ通じる背圧回路９、10、
および作動室への給油回路10、11に供給される。The oil pumped by the oil pump 1 passes through the valve 2 or the valve 3 and returns to the centrifugal valve.
And supplied to the oil supply circuits 10 and 11 to the working chamber.
高速運転時は、バルブ２およびバルブ３を開ける。ポ
ンプ１を出た油は背圧回路９、10に供給され、第２図に
示す遠心力バルブのシート22を作動室連通穴23側に押し
付ける。これにより、作動室からの排油を零にする。During high-speed operation, the valves 2 and 3 are opened. The oil leaving the pump 1 is supplied to the back pressure circuits 9 and 10, and presses the seat 22 of the centrifugal valve shown in FIG. As a result, the oil discharged from the working chamber is reduced to zero.
一方、第１図に示すように、バルブ２またはバルブ３
を通った油の一部は、作動室給油回路11、12を通り、作
動室に油を供給し作動室内に油を溜める。このとき、遠
心力バルブが閉じているので、作動室内の油は第２図に
示す排油口21から逃げない。したがって、作動室内に油
が最大限溜まり、第１図の出力軸８に伝わるトルクは最
大となる。On the other hand, as shown in FIG.
A part of the oil that has passed passes through the working chamber oil supply circuits 11 and 12, supplies oil to the working chamber, and accumulates oil in the working chamber. At this time, since the centrifugal force valve is closed, oil in the working chamber does not escape from the oil discharge port 21 shown in FIG. Therefore, the oil is accumulated to a maximum in the working chamber, and the torque transmitted to the output shaft 8 in FIG. 1 is maximized.
低速運転時は、バルブ２を閉じ、バルブ３は開いたま
まにする。バルブ２が閉じているので、背圧回路10には
油が供給されない。このため、背圧回路10に通じている
遠心力バルブのシート22はシート面24から離れ、作動室
内の油は作動室連通穴23を通り、排出口21から排出され
る。排出口21の大きさにより排出される油量は決まり、
出力軸８に伝わるトルクは、この作動室に溜まっている
油流に見合った値である。During low-speed operation, the valve 2 is closed and the valve 3 is kept open. No oil is supplied to the back pressure circuit 10 because the valve 2 is closed. Therefore, the seat 22 of the centrifugal valve communicating with the back pressure circuit 10 is separated from the seat surface 24, and the oil in the working chamber passes through the working chamber communication hole 23 and is discharged from the discharge port 21. The amount of oil discharged is determined by the size of the discharge port 21,
The torque transmitted to the output shaft 8 is a value corresponding to the oil flow accumulated in the working chamber.
排出口21の大きさを外部から調整するのは困難である
から、可変絞り４を調整して作動室内に溜まる油量を微
調整する。可変絞り４を調整することにより余分になっ
た油は、リリーフ弁５からタンクに戻される。Since it is difficult to adjust the size of the discharge port 21 from the outside, the variable throttle 4 is adjusted to finely adjust the amount of oil accumulated in the working chamber. The excess oil by adjusting the variable throttle 4 is returned from the relief valve 5 to the tank.
本発明によれば、低速側の運転点を全範囲のどこにで
も設定できる。According to the present invention, the operating point on the low speed side can be set anywhere in the entire range.
第１図は本発明の一実施例の給油系統図、第２図は遠心
力バルブの部分断面図、第３図は従来の給油系統図であ
る。 １……油ポンプ、２、３……バルブ、４……可変絞り、
５……リリーフ弁、６……遠心力バルブ、７……入力
軸、８……出力軸、９、10……背圧回路、11、12……作
動室給油回路、21……排出口、22……シート、23……作
動室連通穴、24……シート面。FIG. 1 is a diagram of an oil supply system according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional view of a centrifugal valve, and FIG. 3 is a diagram of a conventional oil supply system. 1 ... oil pump, 2/3 ... valve, 4 ... variable throttle,
5 ... relief valve, 6 ... centrifugal force valve, 7 ... input shaft, 8 ... output shaft, 9, 10 ... back pressure circuit, 11, 12 ... working chamber oil supply circuit, 21 ... discharge port, 22 ... seat, 23 ... working chamber communication hole, 24 ... seat surface.
Claims (1)
て流し、各系統はバルブおよび遠心力バルブを介して作
動室に導かれている、排水ポンプ等に使用される高速運
転と低速運転の２段切換えが可能な流体継手の運転方法
において、 少なくとも一方の系統の前記バルブと前記遠心力バルブ
間から分岐した作動室への油供給回路から作動室へ油を
導くとともに、低速運転時には一方のバルブを閉じてそ
の系統の遠心力バルブを開けて作動室内から油を排出可
能にし、高速運転時には２系統の各バルブを開にして両
系統の遠心バルブを共に閉じて作動室からの排油を不可
能にし、低速運転時に開となるバルブの下流に設けた可
変絞りにより、高速運転と低速運転のいずれにおいても
流量を微調整することを特徴とする流体継手の運転方
法。1. An oil pump, which is fed by an oil pump, is divided into two systems, each of which flows into a working chamber via a valve and a centrifugal force valve. A method of operating a fluid coupling capable of two-stage switching of low-speed operation, comprising: introducing oil to an operating chamber from an oil supply circuit to an operating chamber branched from between the valve and the centrifugal force valve of at least one system, and performing low-speed operation. Occasionally, one valve is closed and the centrifugal force valve of the system is opened to allow oil to be drained from the working chamber. During high-speed operation, each valve of the two systems is opened and both systems of centrifugal valves are closed together to remove oil from the working chamber. A method for operating a fluid coupling, wherein oil discharge is not possible and a flow rate is finely adjusted in both high-speed operation and low-speed operation by a variable throttle provided downstream of a valve that is opened during low-speed operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27586589A JP2821203B2 (en) | 1989-10-25 | 1989-10-25 | Operating method of fluid coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27586589A JP2821203B2 (en) | 1989-10-25 | 1989-10-25 | Operating method of fluid coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03140633A JPH03140633A (en) | 1991-06-14 |
| JP2821203B2 true JP2821203B2 (en) | 1998-11-05 |
Family
ID=17561507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27586589A Expired - Fee Related JP2821203B2 (en) | 1989-10-25 | 1989-10-25 | Operating method of fluid coupling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2821203B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0830506B2 (en) † | 1991-07-16 | 1996-03-27 | 株式会社荏原製作所 | Rapid acceleration fluid coupling |
| CN103591246B (en) * | 2013-10-22 | 2016-05-18 | 杭州前进齿轮箱集团股份有限公司 | A kind of two-chamber load limiting type of constant filling fluid coupling |
-
1989
- 1989-10-25 JP JP27586589A patent/JP2821203B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03140633A (en) | 1991-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |