EP0737162B1 - Winde mit hydraulikmotor, insbesondere für einen mit einem sonar versehenen hubschrauber - Google Patents

Winde mit hydraulikmotor, insbesondere für einen mit einem sonar versehenen hubschrauber Download PDF

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Publication number
EP0737162B1
EP0737162B1 EP95905165A EP95905165A EP0737162B1 EP 0737162 B1 EP0737162 B1 EP 0737162B1 EP 95905165 A EP95905165 A EP 95905165A EP 95905165 A EP95905165 A EP 95905165A EP 0737162 B1 EP0737162 B1 EP 0737162B1
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EP
European Patent Office
Prior art keywords
valve
winch
motor
hydraulic
pressure
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
Application number
EP95905165A
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English (en)
French (fr)
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EP0737162A1 (de
Inventor
François Warnan
Daniel Canto
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.)
Thales SA
Original Assignee
Thomson CSF SA
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Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0737162A1 publication Critical patent/EP0737162A1/de
Application granted granted Critical
Publication of EP0737162B1 publication Critical patent/EP0737162B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/42—Control devices non-automatic
    • B66D1/44—Control devices non-automatic pneumatic of hydraulic

Definitions

  • the present invention relates to winches which are driven by a hydraulic motor. It applies more particularly to winches which equip helicopters and which allow in particular to immerse in the sea a soaked sonar which is suspended from the end of the winch cable to then be returned to the helicopter.
  • Helicopters are often equipped with a winch which allows deposit and collect charges in difficult places accessible by hovering the helicopter.
  • winches include a hydraulic motor which also makes it possible to ensure the ascent of the sonar than to control the descent of it.
  • a hydraulic motor which also makes it possible to ensure the ascent of the sonar than to control the descent of it.
  • a hydraulic motor 101 drives a screw without end 102, which itself drives a gear 103 keyed on the axis 111 of the drum on which the cable is wound and unwound.
  • This screw system endless provides a simple and reliable reduction ratio desired.
  • it has the disadvantage of having a yield in the direction weak reverse, around 40%.
  • this low efficiency has few disadvantages here, taking into account the control circuits used, shown diagrammatically by the block hydraulic control 104.
  • a brake 105 actuated by hydraulic energy is used. block 104 or using a control handle 106. This brake allows to immobilize the winch outside of its operating periods.
  • Figure 2 shows in a simplified way the mechanical part in FIG. 1 and in more detail the hydraulic block 104.
  • the load 201 of the winch is hung on the end of a cable 202 which is wound on a reel 203.
  • This reel 203 is driven by the motor hydraulic 101 itself released, or blocked as the case may be, by a brake 105.
  • Motor 101 is powered from a fluid source hydraulic under pressure P via a shut-off valve 204 and a 4-way servo valve 205.
  • the shut-off valve allows you to apply all the pressure at the servo-valve under the control of a pilot electro-valve 206.
  • This from a low power electrical control signal C1 applies control pressure to the shut-off valve 204, which releases the main pressure.
  • the valve control fluid passes through the pilot solenoid valve to return to the fluid reservoir 207 by via a return R.
  • This tank has been represented under the appearance of an open tarpaulin, but this representation is purely symbolic and it is actually the main hydraulic fluid tank of the helicopter, from which this fluid is pressurized and returned to inlet P.
  • the servo valve 205 is of the known type with 4-way control proportional under the effect of an electric signal of weak control power C2. This servo valve allows on the one hand to reverse the direction of passage of the hydraulic fluid between one side of the P and R circuits and the other side the two supply and discharge pipes of the engine, and on the other hand to finely adjust the quantity of hydraulic fluid admitted into the motor, and therefore the supply pressure thereof, that is to say in the power delivered to the engine as well as its speed.
  • the supply pressure is applied to a pipe 208 which feeds the motor through a non-return valve 209 shunted by a load check valve 210 whose role will be explained further.
  • the hydraulic fluid returns to the return R by a pipe 209 then via the servo-valve 205.
  • a check valve shuttle type 211 is supplied simultaneously by pipes 208 and 209 and allows the brake 105 to be released as well when pressure is applied on pipe 208 as on pipe 209, freeing the engine as well for the ascent and for the descent, when this engine receives a supply pressure.
  • the servo-valve 205 crosses the paths of the hydraulic fluid.
  • the pressure P is applied to the pipe 209 and the motor works in reverse, allowing control this descent.
  • This pressure is also then applied to the valve 210, which frees the passage of the fluid back to the pipe 208 then to the reservoir 207.
  • the discharge of hydraulic fluid by the engine to the pipe 208 is blocked by the non-return valve 209 and the load holding valve 210, which very significantly blocks this engine, except for leaks, and therefore prevents the load to descend freely on its weight.
  • the hydraulic motor control from the pressure leads on the one hand to unnecessary power consumption at the level of the helicopter, for which this power is measured, and a also unnecessary heating of the oil in the hydraulic circuit.
  • the energy coming from the descent of the load is essentially dissipated at the engine by oil heating, and also the fall of pressure of the latter between supply and return dissipates itself in heat, mainly by rolling at the servo valve.
  • the descent of a load of the order of 250 Newtons to 5 m by second over a height of 750 m requires the use of 36 liters of fluid at the minute under a pressure of 200 bars, which corresponds to a power 12 kW which is to be dissipated.
  • the volume of fluid available for this purpose being around 20 l, the dissipation of this energy increases the temperature by these 20 l of about 30 ° C.
  • Such a rise in temperature could perhaps be acceptable on an isolated basis, but the repetition of these maneuvers, frequently necessary in operational conditions, results in much larger total temperature rise, which is the source of many disadvantages such as excessive dilation of hydraulic components, degradation of the oil, and release of heat in the helicopter which must be dissipated by systems coolers.
  • the invention proposes a winch according to claim 1, the preamble of which corresponds to the document EP-A-236,732.
  • said servo valve is a servo valve ⁇ 4 ways mainly used in 3 ways.
  • the winch further comprises a third pipe connecting the servo valve to the second pipe to allow to supply fluid during the descent to the hydraulic motor hydraulic under pressure in just sufficient quantity to avoid overheating of the fluid circulating in a closed circuit.
  • the means of driving the drum by the motor consist of gears having a good output both reverse and direct.
  • these means of training include a bevel gear by bevel gear followed by a train epicyclic.
  • the winch comprises means to additionally supply the motor housing with hydraulic fluid under pressure with sufficient flow to limit additional overheating possible.
  • the winch comprises a motor electric backup connected to the hydraulic motor by a clutch controlled by a cylinder which engages this clutch under the effect of a lack of pressure.
  • this clutch operates also in torque limiter.
  • the winch further comprises a fourth pipe connecting the first and second pipes via a pressure relief valve which allows the pressure to be released backflow when the winch starts to turn in reverse when hoisting by following an accidental catching of the load.
  • the winch further comprises a bypass valve which shortcuts the pressure relief valve when the hydraulic fluid pressure drops.
  • the hydraulic motor 101 drives the axis 111 of the winch reel this time via a bevel gear bevel gear 302 followed by a planetary gear train 312.
  • This gear system makes it possible to obtain much better performance in reverse than the worm system of the art earlier, but other reduction systems could be used which provide the same result. We will see later that this point is important for the invention.
  • the axis of the hydraulic motor is also connected to a motor. emergency electric 107 via a clutch 309 and a reducer 108.
  • This clutch is released by a cylinder 310 which operates under hydraulic pressure from a hydraulic control block 304.
  • the electric motor itself has a control brake electric with lack of current 305.
  • the electric control therefore consists to send current to the brake 305, which releases it, and to the motor 107, this that turns it.
  • the hydraulic motor 101 connected to the reel 203 supporting the load 201 via cable 202 is supplied from the source of hydraulic fluid under pressure P via a valve stop 204 piloted by a pilot solenoid valve 206 receiving a signal command C1.
  • This pressurized fluid is applied to the engine through a 405 servo valve of the same type as the 4-way servo valve 205, but this time used as a 3-way valve. This different use is done simply at the connections on the valve.
  • the clutch control 310 receives from the stop valve 204 the hydraulic pressure via a clutch solenoid valve 401 controlled by an electrical signal C3.
  • This C3 electrical signal allows at will to engage the electric motor on the hydraulic motor, even when the pressure is established. By cons in the absence of pressure, as as we have already seen, the clutch is automatic.
  • the servo-valve 405 crosses the hydraulic circuits under the signal control electric C2. Under these conditions the hydraulic fluid under pressure is applied to an outlet of the servo valve which is blocked for the 3-way operation, subject to the variant described below.
  • the hydraulic fluid leaving the engine 101 which rotates being driven by the reel 203 under the traction of the cable 202, passes through the servo-valve 405 and comes back to the 409 pipe via a return pipe 402. The suction of motor 101 prevents this fluid from returning to the reservoir 207.
  • the fluid which thus circulates in a closed circuit is not subjected than the pressure delivered by the engine and which is simply used for circulation of this fluid
  • the power thus dissipated is therefore very low and we avoid dissipate the power previously delivered by the high source pressure wasted.
  • the invention proposes to renew the oil using a line 403 which is connected between the outlet of the solenoid valve which we said above that it was in principle blocked, but which is therefore slightly open to feed this pipe, and the pipe 409 which allows the return of the fluid in the engine when it operates as a pump during the descent.
  • This feeding is done of course under pressure P and to avoid excessive energy supply the flow rate is limited by preferably using a section pipe narrow, or restriction, shown in the figure by a throttle 404.
  • control flow represented in the figure by the loop 406 between the pipe 402 and the one coming from the valve 204.
  • This loop consumes a flow about 0.5 l of fluid which must be taken into account in the oil balance additional injected, and under these conditions the flow in the pipe 403 is limited to approximately 1.5 l.
  • the operations which have been described so far relate to the lowering of the payload (the sonar) in the water, because this is the phase which lasts the longest, about 3 min. However before entering water the sonar travels the distance between the helicopter and the surface of the water. This happens very quickly, a few seconds, because the distance is short, about 20 meters, and the charge is then about 800 Newtons, 3 to 4 times more than in water. Due to the low volume of fluid used in the invention the overheating that occurs during these a few moments, and which corresponds to the dissipation of a power about 3 KW extra for a few seconds, maybe too much important.
  • the invention proposes to further increase the additional oil flow into the engine this time using a circuit already known elsewhere and consisting in admitting into the casing of the motor a fluid flow rate via a pipe 410 supplied by a electro-valve known as reheating 407.
  • This circuit is normally used to heat the hydraulic circuit in very cold weather, hence its name.
  • C4 a control signal
  • This detection is carried out by known means since it is used for other uses in the known operation of the winch.
  • Using this so an additional flow of 4 l of fluid per minute we thus arrive at limit the temperature increase of this fluid to 30 ° C, which is entirely done satisfactorily.
  • the power dissipated during this short instant can reach 3 kW.
  • a force sensor being part of the known means of the winch makes it possible to obtain a signal of command to open the electric brake 305 and disengage 309.
  • the motor then starts to turn upside down as a pump and delivers on the pipe 408.
  • a pipe 411 which connects pipes 408 and 409 via a pressure relief valve 412, calibrated for example at 220 bars. Under the effect of overpressure this valve opens and the fluid is returned to the return, which lowers pressure and prevents damage, especially to the servo-valve 405.
  • This regime normally lasts only the time necessary to open the servo valve to relieve pressure. This opening takes place according to the detection of the hooking of the load, at the logic level system control, or as a last resort manually.
  • bypass valve 413 tared for example at 100 bars, which short-circuits the pressure relief valve 412 and is controlled by a hose 414 connected to the pressure supply on the pipe between the valve 204 and the servo-valve 405.
  • hose 414 connected to the pressure supply on the pipe between the valve 204 and the servo-valve 405.
  • the set of control signals C1 to C4 will be advantageously obtained using a microprocessor suitably programmed and connected to the various winch sensors.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (10)

  1. Winde mit Hydraulikmotor jener Art, die einen Hydraulikumkehrmotor (101) zum Antrieb der Winde umfaßt, der durch ein Servoventil (405) sowie eine erste (408) und eine zweite (400) Zuführleitung gespeist wird, bei der das Servoventil zum Hochwinden die Versorgung des Motors mit druckbeaufschlagter Hydraulikflüssigkeit durch die erste Leitung gestattet und die zweite Leitung direkt mit der Rückleitung (R) der Hydraulikflüssigkeit verbunden ist, dadurch gekennzeichnet, daß das Servoventil (405) zur Verwendung in einem mit einem Sonar versehenen Hubschrauber, das durch diese Winde gehandhabt werden soll, für das Absenken eine Verbindung dieser ersten Leitung mit der zweiten Leitung gestattet, damit die Hydraulikflüssigkeit in einem geschlossenen Kreislauf ohne Druck während dieses gesamten Absenkens zirkulieren kann.
  2. Winde nach Anspruch 1, dadurch gekennzeichnet, daß es sich bei dem Servoventil (405) um ein Vierwege-Servoventil handelt, das im wesentlichen als Dreiwegeventil verwendet wird.
  3. Winde nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sie des weiteren eine dritte Leitung (403) aufweist, die das Servoventil mit der zweiten Leitung (409) verbindet, damit der Hydraulikmotor (101) während des Absenkens mit einer Menge an druckbeaufschlagter Hydraulikflüssigkeit versorgt werden kann, die gerade dazu ausreicht, die Überhitzung der in geschlossenem Kreislauf zirkulierenden Flüssigkeit zu vermeiden.
  4. Winde nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Mittel zum Antrieb der Trommel (203) durch den Motor (101) aus Zahnrädern bestehen, die sowohl in Rückwärts- als auch in Vorwärtsrichtung leistungsfähig sind.
  5. Winde nach Anspruch 4, dadurch gekennzeichnet, daß diese Antriebsmittel einen Winkeltrieb mit Kegelrad (302) gefolgt von einem Umlaufgetriebe (312) umfassen.
  6. Winde nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß sie Mittel (407) weiterhin zum Speisen des Motorgehäuses (101) durch druckbeaufschlagte Hydraulikflüssigkeit mit einer Durchflußrate umfaßt, die dazu ausreicht, ein eventuelles zusätzliches Überhitzen zu begrenzen.
  7. Winde nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sie einen Elektrohilfsmotor (107) umfaßt, der durch eine Kupplung (309) mit dem Hydraulikmotor (101) verbunden ist, die durch einen Zylinder (310) gesteuert wird, der diese Kupplung unter der Wirkung eines fehlenden Drucks einrückt.
  8. Winde nach Anspruch 7, dadurch gekennzeichnet, daß diese Kupplung auch als Drehmomentbegrenzer wirkt.
  9. Winde nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß sie des weiteren eine vierte Leitung (411) umfaßt, die die erste und die zweite Leitung (408, 409) mittels eines Überdruckventils (412) miteinander verbindet, das ein Ablassen des Förderdrucks gestattet, wenn sich die Winde beim Hochwinden aufgrund eines versehentlichen Hängenbleibens der Last in Rückwärtsrichtung zu drehen beginnt.
  10. Winde nach Anspruch 9, dadurch gekennzeichnet, daß sie des weiteren ein Umgehungsventil (413) umfaßt, das bei einem Druckabfall der Hydraulikflüssigkeit das Überdruckventil (412) kurzschließt.
EP95905165A 1993-12-30 1994-12-23 Winde mit hydraulikmotor, insbesondere für einen mit einem sonar versehenen hubschrauber Expired - Lifetime EP0737162B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9315883 1993-12-30
FR9315883A FR2714663B1 (fr) 1993-12-30 1993-12-30 Treuil à moteur hydraulique, notamment pour hélicoptère muni d'un sonar.
PCT/FR1994/001529 WO1995018061A1 (fr) 1993-12-30 1994-12-23 Treuil a moteur hydraulique notamment pour helicoptere muni d'un sonar

Publications (2)

Publication Number Publication Date
EP0737162A1 EP0737162A1 (de) 1996-10-16
EP0737162B1 true EP0737162B1 (de) 1998-05-27

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Application Number Title Priority Date Filing Date
EP95905165A Expired - Lifetime EP0737162B1 (de) 1993-12-30 1994-12-23 Winde mit hydraulikmotor, insbesondere für einen mit einem sonar versehenen hubschrauber

Country Status (5)

Country Link
US (1) US5735506A (de)
EP (1) EP0737162B1 (de)
CA (1) CA2180004C (de)
FR (1) FR2714663B1 (de)
WO (1) WO1995018061A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI97612C (fi) * 1995-05-19 1997-01-27 Tamrock Oy Sovitelma kallionporauslaitteen vinssin ohjaamiseksi
JP3508662B2 (ja) * 1998-12-25 2004-03-22 コベルコ建機株式会社 油圧駆動ウィンチの制御方法および同装置
US8910473B2 (en) * 2010-12-21 2014-12-16 Komatsu Ltd. Pipe layer and warm-up method for pipe layer
US9021796B2 (en) * 2013-05-20 2015-05-05 Komatsu Ltd. Pipelayer

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US3035414A (en) * 1960-09-08 1962-05-22 Whiting Corp Hydraulic hoist control system
US3380545A (en) * 1966-08-15 1968-04-30 Westinghouse Air Brake Co Cable reel control mechanism
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DE2459778C3 (de) * 1974-12-18 1979-08-16 Wirth Maschinen- Und Bohrgeraete- Fabrik Gmbh, 5140 Erkelenz Bohrgerät
US4004779A (en) * 1975-05-05 1977-01-25 Caterpillar Tractor Co. Winch and fluid control system therefor
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DE3608536C1 (de) * 1986-03-14 1987-09-24 Boecker Albert Gmbh & Co Kg Steuervorrichtung fuer die Betaetigung eines hydraulischen Seilwindenantriebes fuer einen Schraegaufzug
FR2614598B1 (fr) * 1987-04-29 1989-06-09 Thomson Csf Bouee aeroportable largable, notamment pour ecoute sous-marine
FR2629787B1 (fr) * 1988-04-12 1991-01-25 Thomson Csf Bouee sous-marine munie de moyens de stabilisation hydrodynamique et destinee a etre suspendue, notamment a un helicoptere
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FR2637561B1 (fr) * 1988-10-11 1990-11-16 Thomson Csf Dispositif destine a maintenir sous l'eau les engins sous-marins remorques, et procede d'utilisation
FR2638258B1 (fr) * 1988-10-21 1991-10-31 Thomson Csf Mecanisme du type bras articule et antenne de sonar equipee d'un tel mecanisme
US4920680A (en) * 1988-11-03 1990-05-01 Lindgren Peter B Line setter method and apparatus
FR2640799B1 (fr) * 1988-12-20 1990-12-21 Thomson Csf Mecanisme pour l'obtention d'un mouvement de translation en milieu marin et sonar equipe d'un tel mecanisme
FR2660144B1 (fr) * 1990-03-23 1992-05-29 Thomson Csf Dispositif de suspension pour base acoustique.
FR2676725B1 (fr) * 1991-05-21 1998-01-09 Thomson Csf Treuil pour remorquage d'objets immerges.

Also Published As

Publication number Publication date
CA2180004A1 (en) 1995-07-06
FR2714663B1 (fr) 1996-01-26
CA2180004C (en) 2004-11-02
EP0737162A1 (de) 1996-10-16
WO1995018061A1 (fr) 1995-07-06
US5735506A (en) 1998-04-07
FR2714663A1 (fr) 1995-07-07

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