Патент USA US2412053код для вставки
Ecc. 3, 1946. R. LUCIEN 2,412,053 HYDRAULIC REMOTE CONTROL DEVICE ' Filed June 19, 1944 62 f2 _ É-_123.9f7,5 242J I-nvènáor’ lî’enef Lucien 2,412,053 _ Patented Dec. 3, 1946 I UNITI-:D- sTATEs PATENT orrlcs ~ mimmo amîxiïïournoa nii-vica, " et Mecanlqnes S. I. A. M., Fribourg, Swltxer land, a corporation of Switzerland ’ Application .time 19, 1944, serial No. 540.91m in Great Braam Maren 24,1943 - . _2 claims. (ci. en_-51) „ 2 This invention comprises improvements in or relating to hydraulic remote control devices. It is an object of the invention to provide means for the remote control of hydraulic apparatus such as jacks, for example in aircraft, which combines the advantages of centralised supply and control with rapid operation and freedom from risk of breakdown on interruption of supply. - ' On aircraft, especially on large aircraft, or on \ installations of hydraulic apparatus in other con nections where the parts to be controlled are re mote from the point of control and from the l from a pressure-source,lcomprises, in combina tion, an accumulator located close to the appa ratus (Jack or other device) t0 be operated, op.. erating valve-means and connections between the i accumulator and said apparatus to enable the ' accumulator when charged to operate the jack under control of said operating valve-means, hy- ` draulic remote-control actuating means for the' operating valve-means, including connections to the point of control, and a pressure-line from the pressure-source to the accumulator for charg ing the same. ‘ large-diameter piping which extends from the pressure-source to the apparatus in order that In this way only the short connections between the accumulator and jack require to be of large size, the pressure-line and the connections to the lpoint of control may be small and light. The any place in the pipe-system is likely to throw the whole installation out of order. Finally, lthe ity of accumulators may be provided therefor with separate operating valve-means for each de _ pressure source, if promptitude and reliability of operation are required it is necessary to provide pressure-source, such as a pump,4 may be of small the ?low of liquid may be prompt and free. Fur capacity inasmuch as its function is to charge thermore it is ordinarily necessary to have the the accumulatcrs and not directly to operate the _ source of supply of high-pressure fluid located close to the point of control. The result is that 20 jacks or the like. Where, as is usual, the apparatus to be oper» the pipe-work is heavy. Moreover its diameter ated comprises several distinct devices, a plural and length makes it vulnerable and damage at pump ordinarily employed as the source of sup 25 vice all connected by hydraulic remote-control ' means` to the control point and the pressure ply, must have an output fast enough to operate source may be connected to the accumulators'by _ the apparatus at the desired speed. It has been proposed _to control hydraulic jacks ' a branched pressure-line which serves them in on an aircraft from a central control station by 30 Preferably when the hydraulic devices include common. control means having electrical transmission and to have the hydraulic installation located in close conjunction with theojacks. This reduces weight and vulnerability but involves complication by introduction of the electrical apparatus. y , Y l a jack a hydraulically-controlled locking-device v . may be provided for one end- of the movement i or both ends of the movement) of the jack and the operating valve-means include. a connection In order to ensure reliable extension of an un.. 35 to the locking device to unlock it when the valve means are operated to apply pressure to the jack der-carriage irrespective of damage to pipe-work to move it. I In this way the apparatus in the case it has also been proposed in prior United States of» any failure in the pipe-work may be caused patent specification No. 2,001,620 to provide for by the locking device to remain in the position in movement in the direction of extension being ef-fected by pressure supplied by an accumulator lo 40 which it has already been set and may alsoXnot 'be disturbed in the event of any failure in the A cated close to the jack so that only retraction needs to be effected by liquid supplied from the supply pump. v It will be appreciated that the small capacity pressure-source. Certain risks due to the possi bility o_f damage to the intermediate piping were 45 required of the control connections permits the thus obviated and the quantity of pipe-work was use of very light pipes and this results not only reduced, but still the flow of the fluid had to take in a saving of weight, which is important in the place in the full volume necessary for operation, case of aircraft, but also in a reduction of the through a length of piping extending the whole risk of damage in combat, which is important way between the pressure-source, the point oi 50 in the oase of military services. Furthermore control and the Jack and the capacity of the such piping is much more easily installed. pump and size and weight of the piping necessary 'I'he following is a description, by way of ex had to be designed accordingly. ample, of one installation in accordance with the According tothe present invention a hydraulic system wherein the apparatus to be operated is 55 invention: The accompanying drawing is a diagrammatic located at a distance from a point of control and 2,412,058 - 4 3 representation of the parts of the system andof the interconnecting pipe-work. 'I'lie installation comprises a number of hy draulic jacks on an aircraft (of which one only is shown at II) connected respectively to the un Jack and in the other direction allows the valve to seat and connects the jack through the supply compartment 22 and the interior of the valve stem 23 to the drain pipe 33. dercarriage framework for retracting the same, to bomb doors, to landing flaps and the like (not Beyond the exhaust cylinder 3|, and axially in line therewith, isa larger actuating or- motor cyl inder 35 containing a relay piston 36. This pis shown in the drawing) as may be desired. Close ly associated with each jack, or with a group -of motor. ` 'I'he relay piston 36 has a stem 31 which ton may be broadly designated a valve-actuating jacks where several jacks are located close to 10 is capable of engaging the tappet 34 in the ex gether, is a hydraulic accumulator I2 of sufficient haust cylinder but is urged away therefrom by a capacity to operate the jack or jacks at least spring 38. Behind the relay piston the operating cylinder is provided with a connection to a iine once in each direction._ The accumulators are bore control-pipe 39 (or 40 as the case may be) connected through non-return valves | 3 by small bore pipe-work I4, I5 with a central supply pump 15 and when pressure is applied- in the operating » cylinder 35 by ñuid supplied through the control I6 located in> a position where it can readily be pipe 'the stem of the piston therein is urged driven. by one of the engines of the aircraft. This against its spring 38 into contact with the piston Apump may be of small capacity and will be re or tappet 34 in the exhaust cylinder 3| and' quired to run’on load for a longer proportion of the working period than is usual with hydraulic 20 thereby closes the piston against the lift-valve, and if the movement is continued lifts the lift . pumps on aircraft, which is beneficial from theA valve from its seating. , ‘ point of view of the pump. The function of the . The two control-pipes 39, 40' which openinto pump is to charge the accumulators, which may the two actuating cylinders 35 are connected to a be done slowly. It will be observed that thepipe control-box in two parts 4|, 42 located in a lcen-I |15 is branched at I_4 to the accumulator I2 and tral point of control on the aircraft where it can other branches will be provided to the other ac readily be controlled by the pilot or other per cumulators. The accumulators“ are connected sonnel. Each control-box comprises a, lever 43, each by a short pipe I1 and 21 of large bore to an which lever operates control lift-valves 44, 45. operating valve (in two parts I8, I9) for each I _ jack and the operating-valves by similar pipes 2li and 2| to the- jacks. Thus when the operating valves are, operated the Jack is operated rapidly, irrespective of the supply capacity of the pump. "I'he valves 44 admit hydraulic `fluid under pres- I sure from a compartment 46 to compartment 41 of the box, and thence to one of the control-> pipes 39 when one lever .43 is moved in one direc tion and the other controlèpipe 48 when the other lever 43 is moved in the other direction. `The levers 43 are linked by spindle 48 to move in the operating-valve casing. Through the supply unison and controlled by handle 49. The fluid compartment 22 there passes the hollow stem 23 under pressure is supplied to the control-box of a lift-valve 24 the exterior of which passes from the aforesaid central pump I8 by pipe 50 through the walls oi’> the compartment with a fluid-tight fit. Outside the compartment is an 40 and only a very small quantity of fluid is neces» sary to operate the relay pistons and open the admission chamber 25 which is spanned by a lift-valves of each jack. (It will be understood diaphragm 26 containing a seating for the head the cylinders 35, 3|, I8 and I9 and associated of the lift-valve and one of the supply connec parts are> not to scale and in practice are much tions 21 from the accumulator I2 enters the ad smaller in proportion to the size of the other mission chamber. The hollow stem 23 has a port parts than is possible to show on the drawing.) 28 connecting the interior of the stem with the 'I'he valves 45 when opened connect the com admission chamber 25 below the diaphragm 25 so partments 41 to compartments 5| and the com that if the valve 24 is lifted from its seating the partments 5I are connected to a drain pipe 52. pressure ñuid from the accumulator will enter the stem through the port. Another port 29 in 50 The valve 45 in each box is opened by lever 43 when valve 44 is closed. 'I'he boxes 4I, 42 are the stem connects the interior of the stem with Each end of the jack cylinder || is connected by the pipes 20, 2| to a supply compartment 22 in the supply compartment 22 which is connected reversed in relation to one another so that when to the jack by pipe 2|. Thus when the lift-valve 24 `of either valve I8 or I9 is raised from its seat ing, the end of the jack II which is connected to the compartment will receive fluid under pres sure fr_om the accumulator. The interior of valve pipe 39 is under pressure pipe 45 is open to drain, 3| works a tappet 34 which can be moved so that movement. and vice versa. A similar pair of control-boxes 4|, 42 and han dle 4.9 is provided at the central station for each jack in the system and thus by a. system of very light pipe-work the connections of the Jacks to Il' I9, of which only the exterior is shown, is similar their respective accumulators can be controlled to that of valve I8. As above stated, the stem 23 of the lift-,valve 60 as desired and the jacks operated in either direc passes right through the supply compartment 22 tion without necessitating the whole of the oper and out through the wall thereof onthe opposite ating fluid iiowing all the way to the Jacks from the pump I6 during the period of operation. side from the head ofthe valve. The end of the stem is open and- carries a seating 30; Beyond _Furthermore, some of the jacks, particularly theunder-carriage Jacks, may be provided with the compartment the end of the stem projects hydraulically-operated bolts 53, 54 or their equiv into an exhaust cylinder 3I which is connected` by a port 32 to a drain pipe 33. In the .cylinder _ aient for locking them in one‘or other extreme of These bolts are slidably mounted in it engages the seating 38 around the end of the ` cylinders 55, 56 which contain bolt-withdrawing stem 23 and thereby seals the interior ofthe valve 70 pistons and return springs. The cylinders which stem from the drain, while further movement of , contain the bolt-withdrawing pistons are con the piston or tappet would lift the valve 24 from nected by short pipes 51, 58 to the actuating cyl its seating. It will be appreciated therefore that inders 35 which contain the relay pistons 35. movement of the actuating tappet 34 in one di The connections for this purpose extend to the rection lifts ’the valve and applies pressure to the centre of that end of the actuating cylinders to 2,412,053 which the control pipes 39, 40 are connected and the ports äs'by which the connections from the hydraulic locking bolts 53, 54 enter the relay cyl - tween said jack and said accumulator; operating valve means disposed in said connections to en on the relay pistons 38 when the latter are fully` retracted under the iniluenoe o1' their springs 38 able -the accumulator, when charged, to operate the jack under the control of the operating valve means; hydraulic actuating valve means and' a. source ofA pressure; and piping independently connecting said accumulator and said actuating to allow the lift valves 2l to close. valve means with said pressure source, and said inders are surrounded by seatings 80 which are arranged to be engaged by co-operating seatings v In operation, the first eiiîect of admission' of. pressure to one of the actuating cylinders 35 is to move the relay piston 36 off the central seating 6U and to admit control iluid under pressure to> one of the bolt-withdrawing'cylinders 55 or 58, as the case may be, so- that the jack is unlocked. After a. short movement of the relay piston the rod 31 engages the tappet 34 in the exhaust cyl inder 3i oi' the valve and opens the lift-valve 24 to cause the jack to move. The other lift-valve in the other operating-valve casing i8 or i9, as the case may be, is, of course, at this time open to drain pipe 33. The jacks are thus locked in either of their end positions until the relay pis tons are operated, whereupon they are first un locked and then have pressure applied to them to , produce movement. _ „ actuating valve meanswith said operating valve means; locking means for retaining said jack in a fixed position; and hydraulic fluid connections from said operating valve means to said lock- t ing means for actuating said locking means, said second-named connections being independent of the ilrst-named hydraulic connections between saidvjack and said operating valve means; said Second-named connections being supplied from saidl actuating valve means, but the transmission of operating pressure through said connections to said locking means being controlled by the movement of said operating valve means. , 2. A hydraulic operating system, comprising, in combination, a hydraulic jack; and accumu lator adjacent said jack;` hydraulic connections between said jack and said accumulator, operat 62 extends to a sump “to which also opens the pipe l2 and from which the pump I6 draws its ing valve means disposed in said connections to _enable the accumulator, when charged, to oper ate the jack under the control of the operating valve means: hydraulic actuating valve means and a source Lof pressure, and piping independent ly connecting said accumulator and said actuating supply. The pipe 82 should be of adequate di valve means with said pressure source. and said The drain pipe 3l is connected bya pipe El to a main return pipe B2, the pipe 6l being a branch from this so that only one return pipe l2 is need ed to serve all the Jacks in the system. The pipe ameter but is not under pressure and may be thin. Y Also only one such pipe is required and if rup tured it does not lead to any failure of opera tion, only loss of fluid. ’ ' 'I'he advantages of this lsystem may be sum- ' marised as followsz., actuating valve means with said operating valve means; said operating valve means comprisins controlled passageways for >pressure iiuid passing from said accumulator to said jack, a valve ele ment associated with said passageways, a valve moving motor, and amotor chamber subject t0 l fluid pressure from said actuating valve means; 1st. rapidity of operation. 2nd, convenience of control. . v 3rd, the :lacks are maintained in either of their locking means for retaining said jack in a ñxed - position, a conduit leadingv from said motor extreme positions by direct pressure from the ac chamber to said locking means, whereby said ac cùmulator. 4th, in case of breakage of the control pipe work the gear remains with its position unaltered. tuating valve means serves to actuate both the' ' `5th, only short lengths of'large diameter pipe operating valve means and release said locking means, and means for covering the inlet of the conduit leading from said motor chamber to said are required, the long lengths of pipe-work being ~ locking means, when the operating valve means is idle, but which are moved to open said conduit upon the initial movement of said motor means 1. a hydraulic operating system, comprising, 50 as pressure iiuid is admitted to said'motor cham Vber from said actuating valve means. ’ in combination, a hydraulic jack; an accumulator of small diameter and easily installed. Iclaim:l ' , y adjacent said jack; hydraulic connections be RENÉ LUCIEN.