Патент USA US2127738код для вставки
AugG 23g, 193„ F. KUGEL. 2,127,73s HYDRODYNAMIC FLUID COUPLING Filed Aug. 10„ 1936 au? s 2 Sheets-Sheet l „ Aug. 23p 1933.. ` F, KUGEL 2,127,738 HYDRODYNAMIC FLUID COUPLING Filed. Aug. 1o, 1936 ' 2 sheets-sheet 2 - Patented Aug. 23, ,1938 2,127,738 UNITED STATES PATENT oFFicE Application August 10, 1938, Serial No. 95.301 In Germany August 14, 1935 l '14 claim» (01; iso-_54) The invention relates to hydraulic power trans these scoops being arranged toleifect a complete mitting devices, such as ,hydraulic couplings or ` emptying of the working chamber. In ,order to Atorque converters, and iii-particular to the pro obtain the large slip between primary and vision, in such devicesg’wofs. rotating reservoir secondary parts necessary for the working of the chamber connected by separate passages to the working chamber so as. to take up the working fiuid‘temporarily notl required, and thereby to enect a quick emptying and ?lling of the fluid circuit. . working chamber.' - .v ' through a iluid coupling 'with a control valve in to work as soon as a sumciently large difference its closed position. in speed» existed between the fluid and the scoops. l Figure 2 is a similar section through _a ñuid coupling with the control valve in its open posi- l5 . reservoir chamber from the working chamber through the same canals by which it entered, as , soon as the slip decreased in response to a change in the operating conditions. By this use of a com mon intake and discharge passage, either thefilling or the emptying conditions were interfered with and unfavorably inñuenced. One object ofthe present invention is to provide a hydraulic power transmitting device wherein two separate connections between the reservoir chamber and the working , chamber allow the working fluid to enter and leave ‘the working chamber by separate paths, thus providing the most favorable arrangement for filling and empty~ ing the working chamber. l ' ' v - , Another object is to provide such a device wherein the reservoir chamberv is arranged in the primary or driving part of the deviceby reason of the fact that the latter rotates always at >maxi - mum speed so that theV working fluid storedy there stands under high pressure, due to centrifugal force.` If the speed of the prime mover operating the primary or drivingv part of the hydraulic coupling or torque converter can be varied, -cen 40 trifugal force may be utilized to effect 'the en trance of theV working fluid from the rotating reservoir chamber into the working chamber through passages in the primary wheel, these be ing preferably adjustable. The centrifugal force ' may be varied by changing the speed and thus 50 chamber 'is connected to a ring valve which may ~ throttle or even interrupt the flowv of fluid to the ’ Hitherto, in such devices. the ‘discharge of the working fluid to the reservoir chamber has fre quently been effected by scoop tubes which started In such prior devices the fluid returned to the 30 scoops, the speed of the primary wheel is either 5 decreased or the discharge valve of the reservoir In the drawings: , ‘ . Figure 1 _ is a vertical longitudinal sectionv tion. " Figure 3 is a similar section through a fluid coupling having an automatic regulating device for the control valve. f A Figure 4 is a cross section along the line l-l inV 20 Figure 1, showing the scoop tube construction. ‘ Referring tothe drawings in detaiLin >Figure 1 the primary wheel a >is connected with a variable speed engine by the driving shaft al. The second ary wheel bis mounted on the driven shaftbl.' Awall ‘26 a2 connected-with the primary wheel a, together~ with the _back of the latter, forms the rotating chamber u, while coupling casing aii extends over the secondary part~or turbine wheel b and forms a bearing for shaft b1 and is sealed against the 30 v . shaft b1 by the'stuillng box f. Primary wheelv a is provided with passages p the openings of which are preferably adjustable. These passages p form a connection between the chamber u and the core space r. In the secondary part h, scoops m and 35 canals n are provided to return the working fluid _ from the transmission circuit to the chamber u along overiiow edge‘t.' ' When starting the coupling, the secondary part b of the coupling is at' rest. - As the speed ofthe 40 primary part a. increases, the fluid in the chamber u is -urged from the chamber u, through the pas sages p by centrifugalV force, thus filling the fluid circuit, i. e. engaging the coupling. With decreasing speed of the engine, and thus of the A4&5 the slip between the wheels. If the 4speed of the prime mover is not variable, a valve is arranged to control the supply of fluid to and from the primary part a, the scoops m gradually come into operation, due to the increased slip, and empty the _ working chamber and rotating chamber, respec tively. This valve, operated automatically or manually, controls' the supply of working iluid In Figures 1 and 2 the blade wheel, driven by a from the reservoir chamber to the working cham ber. Another object is to provide such a device with scoops at the circumference of the secondary part, fluid circuit` to the chamber u, _ constant speed engine, is _marked a.. „ This `wheel 50 . is connected with the engine shaft al by means of a shell a“, which is integral with the engine shaft a1. >Blade wheel b is fastened on the shaft b1 of the machine, to be driven and inclosed by the coupling casing a3 connected to the primary blade 55 2,127,738 wheel a. The coupling casing a.l forms a bearing return the fluid to the chamber u so that finally for the output shaft b1 and is sealed thereagainst by means of the stuffing box f. The back of the a complete emptying and disengagement of the coupling is again obtained, and the driven ma primary blade wheel a and the shell a2 connected chine comes to rest. thereto, inclose the hollow space u serving as a In order to assist the flow of the fluid from the secondary wheel b to the chamber u, it is reservoir chamber for the working fluid which is temporarily not required by the coupling. A number of passages p lead from this chamber _to preferred to provide the secondary wheel b with the core space r of the coupling. These passages p can be closed by the valve body s, to which the an overflow edge t projecting into the chamber u. It is further preferred to construct the valve body s in such a manner that it will also form 10 one of the lateral limiting walls of the chamber u. ring valve s1 is connected. In the position indi . cated, the valve s1 closes the blade canals ofy Accordingly, when the valve body s is moved, for the purpose' of filling and thus engaging the cou the primary wheel and at the same time the an nular portion sa also closes the passages p leading pling, this wall will have a displacing effect on the ñuid in the chamber u, whereby the filling of 15 to the core space r. 'I'he valve body s can be ad justably moved from the outside, adjusting sleeve the coupling is accelerated. Thus it will be seen that in the operation of i in an axial direction through the operating con nection formed by the pin j and the slot k. By the coupling shown in Figures 1 and 2 the fluid moving the valve body s towards the driving shaft contained in the space u is urged outwardly by al, the circuit is thereby opened for working fluid reasonof the centrifugal force created by the through the blade canals of the primary wheel a rotation of the coupling. 'I'his fluid is forced from the reservoir chamber u by way of the ythrough the bores p in the coupling rotor a. by core space r and passages p. Secondary blade reason of this centrifugal force, when the valve wheel b is fitted with scoops m connected by member s and its annular portion s3 are shifted to the left, as shown in Figure 2. Thus the ring canals n to the part of chamber u near the axis. When starting with the valve s1 closed (Figure slide valve s1. and the annular portion sa cooperate l) , the secondary part or rotor b is at rest. With ' to produce the desired result. 'I‘he ring slide valve increasing speed of the primary part or rotor a, s1, by altering the circulation within the coupling however, any fluid that might have remained rotors a and b, increases the slip in thefrotor a between the blade wheels will be thrown out by so y that the scoop tube comes into operation, centrifugal force, caught by the scoops 1n and whereupon the fluid within the rotors œ and b is led through the canals n to the space q near thev conducted through the scoop tubes m and the axis, whence it then flows back to the chamber- space q into the chamber u. To prevent the u. Since a return of the fluid accumulated in the escape of the fluid at the same time through the chamber u into the working circuit is made im-- bores p, the annular portion sa comes into action, possible by the closed condition of the valve s1. and closes the inlets to the bores p. When it is an almost complete discharge of the working fluid desired to fill the coupling again, the slip is once from the coupling spaces a, b, q and r to the more reduced by moving the slide valve s1 and an 15 20 25 30 chamber `u is secured. This means that the cou nular ,portion s’ by shifting ‘\the shift member i pling cannot transmit any torque when started so that the working fluid canlflow freely through 40 with the valve 81 in this condition. the bores p, from the chamber u, to the rotors a. » The working fluid accumulated in the chamber u is now influenced bythe rotating walls and sub jected to centrifugal pressure. As soon as the valve body s is moved to the left by meanslof displaceable sleeve i (Figure 2). the consequent and b of the coupling. » In the modined construction of Figure 3 there is shown means to provide for an automatic en gaging and disengaging ot the coupling in re 45 sponse to the' input and output speeds or to the shifting of the ring valve sl uncovers the passages slip. This is realized by utilizing a _centrifugal p so that the fluid passes through the passages 'p mechanism c, which becomes operative te dis into the working space of the coupling at high velocity. The coupling thereby acquires the ca pacity to transmit torque, i. e. the coupling is is exceeded. place the valve body s as soon as a certain speed , _ This centrifugal mechanism c consists of a ily engaged. Secondary runner b then starts to ro weight c1, on an arm c’. pivotally mounted on tate, whereupon the fluid which is still discharged the pivot member c’. Likewise mounted upon by scoops m to the rotating axis does not reach the chamber u any more, but is immediately re turned to the coupling spaces a, b and r by cen trlfugal force. The scooping efi'ect of the scoops ' m decreases with the increasing speed of the sec the pivot member ca is an arm c4, pivotally con nected at' its opposite end to a link c‘. The link 56 c* is pivotally attached to a lug s’ mounted upon the valve body s. In the operation of the apparatus shown in ondary wheel b and finally ceases completely, Í due to the centrifugal force counteracting thev passage of the iluid through the canals n. @The coupling spaces a. b and r thusremain completely filled, 'whereby the full transmitting capacity of the coupling is obtained. - ,_ .When stopping the coupling, the valve body-s is moved to the right (Figure 1) , whereupon the >ring valve s1 closes the openings to the blade canals ofthe wheels a and b, and simultaneously closes the passages p. This interruption of the fluid circuit immediately causes a considerable _Figure 3, the rotation of the casing aI creates centrifugal force which causes the ily weight c1 to move outward, swinging the arm c4 to move the link ci- to the left. lIfhis action shifts the valve body s to the left, overcoming the thrust of the coil spring h1 and causes' the ring valve s1 to Open the passages». - It will be understood that I desire to compre hend within this invention such modifications as come within the 'scope of the claims and the in vention. . I claim: ' 4 A 1. In a hydraulic power transmitting device, coupling so that the speed of the secondary wheel aworking chamber, a driving rotor and a driven b decreases considerably, due to the load on the , rotor therein, -and inclosing casing for said de machine being driven. This speed reduction I, vice additionally forming the outer wall of a ro causes the scoops mito become-operative again to l tatable reservoir connected to one of said rotors 75 ' reduction in the transmission capacity of the 3 2,127,738 for' varying the ‘_flow of fluid through both and extending substantially to the- periphery said iluid passage and said working circuit. thereof, a iiuid passage extending'irom the pe _8. In a hydraulic power transmitting device, ripheral region of said reservoir and running in working chamber, >a driving. rotor and a driven an axial ‘direction to said working chamber, and l'arotor forming' a working’circuit therein, _a iiuid a peripherally disposed valve member arranged reservoir, a fluid passage interconnecting said adjacent said iluid` passage and inovable rela `iïiuid reservoir and said working chamber, and a tivelyvthereto. for varying the now of fluid-there _valve member having portions movable rela' to both said iiuid passage and working 2. In a hydraulic power -transmitting device, tively circuit for varying the ilowv oi `iiuicl through both a working chamber. a driving rotorand'a driven the said iiuid passage and said working circuit, through. _ A - ’ rotor therein, a rotatable reservoir associated `in _ said valve portions being movable simultaneously » one o! said rotors, a ñuid passage interconnect across said fluid passage and said working cir ing said reservoir and said working chamber, a - cuit, whereby to valve the duid flow- therethrough valve member arranged adjacent said fluid pas# ilk single motion of said valve. sage and movable relatively thereto for varying by9.a Ina hydraulic power transmitting device, the flow of iluid therethrough, and means re- ' a working chamber, a driving rotor and a driven sponsive to the rotation of one 'of said rotors for forming a working circuit therein, a iiuid, automatically varying the setting of said valve ' ` rotor reservoir, a iluid passage interconnecting said iiuid reservoir >and said working chamber, a valve 3. In a hydraulic power transmitting device, a member' having portions movable relatively to member. ' , - working chamber, a driving rotor and a driven rotor therein, a rotatable reservoir associated in both said iluid passage and working circuit for varying the flow oi' fluid through both the said ñuid passage and said working circuit, and means responsive to the rotation oi.' one of said rotors ` one oi said rotors, a ñuid passage interconnect ing said reservoir and said working chamber, and a valve‘member having .portions movable rela for automatically varying the setting of said valve tively to said ñuid passage and also relatively to the iluid circuit within said working chamber for 10. In a hydraulic power transmitting device, varying the now of iiuid through both said iiuid a working chamber, a driving rotor and a driven passage and said working chamber iluid circuit. , rotor’ forming a working circuit therein, a i‘luid 4. In a hydraulic power transmitting device, member. 30 _ \ ` reservoir, `a iluidv passage interconnecting said fluid reservoir and said working chamber, a valve . a Working chamber, a driving rotor and a driven rotor therein, a rotatable reservoir associated in one of said rotors,£a huid passage interconnect ing said reservoir and said working chamber, a -valve member arranged adjacent _said iluid pas sage and movable `relatively thereto for varying the flow of iluid therethrough, means responsive to the rotation oi one oi' said rotors for auto ì member having portions movable relatively to both s_aid ñuid passage and working circuit i'or varying the ilow of ñuid through both the said iiuid passage and said working circuit, and yield ing means urging said valve member toward its -- closed position. matically varying the setting of said valve mem 40 ber, and yielding means urging said valve mem ' _ ber toward i closed position. ` 5. In a hydraulic power transmitting device, _. 11. In a hydraulic power transmitting device,` ` a working chamber, a driving rotor and a driven a working chamber, a driving rotor and a driven rotor therein, an inclosing casing for said device -additionally forming the outer wall of a rotatable reservoir connectedv to one of said rotors and rotor therein, _a rotatable reservoir associated in one of said rotors, a fluid passage interconnect extending substantially to the periphery thereof, a iiuid intake passage extending from the pe-f riphery of said reservoir to said working cham ing said reservoir and said working chamber, a. ber, a separate iiuid discharge passage intercon valve member having portions movable relatively - necting said reservoir and said working chamber, ' to said iluid passage and also relatively to the iluid circuit within said working chamber for varying the iiowotÍ fluid through both said fluid passage and said working chamber fluid circuit,- ' and yielding means urging said valve member to ward _its closed position. . 6. In a hydraulic power transmitting device, a working chamber, a driving rotor and a driven rotor therein, an inclosing casing Ior- said de vice additionally forming the- outer wall o! a ro - tatable reservoir connected to one oi said rotors and 'extending' substantially to the periphery thereof, a`relatively short fluid intake passage extending from said reservoir at a location near vthe periphery of one of said rotors to' said work ing chamber, a'separate discharge passage ex tending irom said working chamber to said reser voir, and a peripherally disposed valve member arranged adjacent said intake passage `and mov able relatively thereto for varying- the ilow of iiuid therethrough. _ » '7. In a hydraulic power transmitting device, a working chamber, a driving rotor and a driven rotor forming a working circuit therein, a huid reservoir, a iiuid passage interconnecting said iiuid reservoir and said working chamber, and a valve member having portions- movable relatively' 75 to both said iluid passage and- working circuit and peripherally disposed valve means for controlling- the flow of iluid through one'of said passages. Í ' ' ' ' l2. In a hydraulic power transmitting device, a working chamber, a. driving rotor and a driven rotor therein, an inclosing casing‘for said .device additionally forming' the outer Wall of a rotatable reservoir connected to one of said rotors'and extending substantially to the periphery thereof, y Va iiuid intake passage extending >from» the pe riphery _of said reservoir to said working cham ber, a separate iiuid discharge passage intercon necting said reservoir and said working chamber, disposed valve means having a valve member disposed near the periphery-of one ‘ and peripherally of said rotors for controlling the ilow of iiuid through said intake passage. ' - 13.` In a hydraulic power transmitting device, a working chamber, a driving rotor and a driven rotor therein, a' rotatable reservoir associated '.with one of said rotors, a fluid intake passage and a fluid discharge passage interconnecting said reservoir and said working chamber, valve means for controlling the ilow of fluid through one of said passages, and means responsive to the rotation of one oi'said rotors for automati cally varying the setting of said' valve means. 4 2,127,738 14. In a hydraulic power transmitting device. a working chamber, a driving rotor and a driven rotor therein, an inclosing casing for said device additionally forming the outer wail o! a rotatable reservoir connected to one oi said rotors and ex tending substantially to the periphery thereof, a relatively short iiuid intake passage extending from the periphery of said reservoir to said work ing chamber, a separate fluid discharge passage interconnecting said reservoir and said working ; chamber, valve means having a valve member dis posed near the periphery of one of said rotors adjacent said working chamber for controlling the now of ñuid through said intake passage, and a scoop on said discharge passage within said working chamber arranged to assist the emptying. 5 of the working fluid from said working chamber into said reservoir in response to the attainment of a predetermined slip between said driving and driven rotors. FRITZ KUGEL.