US2133029A - Turbo coupling - Google Patents

Description

oct. 11,1938. P KUGEL 2,133,029

TURBO COUPLING Filed Feb. 1a, 1957 z'sheets-sheet 1 y Kuggz oct. 11, 193s. E. KU'GEL 2,133,029

TURBO COUPLING Filed Feb. 18, 1937 '2 Sheets-Sheet 2 'wfg @331m .'faMm.. v

Patented Oct. 11, 1938 UNI-TED STATES PJrENr OFFICE TURBO COUPLIN G I Fritz Kugel, Heidenheim-on-the-Brenz, Germany, assignor to American Voith Contact Company Inc., New York, N. Y.Y

Application February 18, 1937, Serial No.'126,514

In Germany February 20, 1936 1o .om (ci. eso-54) This invention relates to fluid power transmitfters, and in particular, to arrangements for flll- 4ing and emptying such transmitters with respect to the working iuid.

One object of this invention is to provide a i iluid power transmitter circuit having a working chamber and a fluid storage chamber, with oppositely facing stationary' scoop tubes, one of which is adapted to empty the iiuid storage chamber and the other to fill it, these scoop tubes power transmitter and the fluid source for selectively connecting one of the scoop tubes with the fluid source while disconnecting the other scoop tube therefrom, this valve being arranged in an intermediate position to cut off communication with both of the scoop tubes so as to maintain the lling of the transmitter in a iixed g5 condition.

Another object is to provide a, uid power transmitter circuit, as described above, wherein the scoop tubes consist of a single U-shaped tube having an aperture at the lowest portion of the tube, arranged to be immersedin a fluid in the storage chamber, and connected to serve either as a fluid intake or fluid delivery port, depending upon which-arm of the U-shaped tube is connected with the uid source.

Another object is to provide a iluid power transmitter circuit, as described above, wherein a by-pass line with a one-way valve permits circulation of the Working-uuid through the transmitter, yet prevents the return of the iiuid into the transmitter when the fluid contents of the transmitter are drained into the uid source by suitably shifting the control'valve. y

In the drawings:

Figure 1 is a longitudinal section through one embodiment of the fluid power transmitter circuit of this invention.

Figure 2 is a left-hand front elevation, partly in section, of the iluid power transmitter circuitshowninliigure1..V

Figure 3 is a front elevation of a modification of the fluid power transmitter circuit shown in Figures 1 and 2.

Figure 4 is another modiiied uid power transmitter circuit for use with a uid power trans- 55 mitter, such asis shown in Figure 1, but employing a displacement body for control purposes. Figure 5 is another modication, similar to Figure 4, but employing a movable inlet tube for varying the level at which the tube will draw in iiuid from the iluid source.l 5

Figure 6 is an enlarged view of the lower portion of the U-shaped scoop tube in Figure 3.

In general, the fluid power transmitter circuit of this invention consists of a uid power transmitter with a rotatable casing having intercom- 1o municating iiuid storage and working chambers with driving and driven rotors in the working chamber, and a stationary casing having iluid intake and outlet compartments with oppositely facing scoop tubes in the storage chamber and 16 connected to the compartments for withdrawal of fluid from the intake compartment and for delivery of iiuid to the outlet compartment.

Another feature of the invention consists in a. single control valve adapted in opposite positions l0 to shut off communication between the iluid reservoir or fluid source and one of the scoop tubes, while opening communication between this reservoir or tank and the other scoop tube. Preferably, the control valveis also arranged to provide 25 .an intermediate position in which both scoop tubes are shut oi! from communication with the fluid reservoir so as to maintain the iilling of the transmitter in a xed condition while the valve isin this intermediate position. 30

Still another feature of the invention resides in the provision of a by-pass line extending between one of the scoop tube lines and the working chamber so as to permit the circulation of fluid between the various chambers of thetransmit- 35 ter, yet having a spring-loaded valve to prevent the uid from returning tothe transmitter when the control valve is shifted to cause the outlet scoop tube to be connected to the rervoir to drain the uid from the storage 'chamber into 40 the reservoir.

A modification of the invention consists of providing a single U-shaped scoop tube mterconnecting the intake and outlet compartments of .the stationary casing, and having a port at the 45 lowest portion of the tube, this port serving as a fluid delivery port while the uid intake line is connected tothe reservoir, andas a fluid withdrawal port while the fluid outlet. line is connected to the reservoir. 50

Hitherto, suitable pumps have been employed to deliver the working fluid from the reservoir to the fluid power transmitter. The fluid which escaped by leakage from the transmitter during operation was replenished by the pump, so that the lling of the transmitter remained complete while the pump was in operation. When it was desired to empty the transmitter the pump was halted so that no more fluid was delivered to the transmitter, and the uid within the transmitter was returned to the reservoir through a stationary scoop tube, or other suitable means. This arrangement, however, had the disadvantage that the lling pump absorbed a considerable amount of power, and resulted in an increased cost of installation or operation, or both. In such an arrangement, moreover, the lling pump was required to be of large capacity in order to ll the transmitter quickly when lling became necessary.

In order to maintain the transmitter in a lled condition, moreover, an additional leakage pump which absorbed less power was usually employed. Even when the filling pump was dispensed with by. employing an overheadtank and gravity delivery of Huid, it was usually necessary to providea leakage pump in order te deliverv the leakage iluid from the lowest point of the iuid circuit to the overhead tank.

Referring to the drawings in detail, Figure 1 shows a fluid power transmitter having an impeller c mounted on a driving shaft C1 and a runner d mounted on a driven shaft d1. A casing consisting of shells c2, c3 and cs is connected to the impelier c so as to rotate therewith. The shells cz and cs provide an oilchamber ce, into which the oppositely facing stationary scooptubes a and b project in such a manner that their mouths are immersed in the fluid within the peripheral portion of vthe oil chamber c4. The scoop tube a and scoop tube b are connected, respectively, to chambers q and r formed in a stationary casing p by means of the partitions p1, pz and p3.

The scoop tube a has its offset scoop portion immersed in the fluid =in the oil chamber c4 for the purpose of directing the uid from the chamber c4 to the chamber q, and thence through the conduit a1, valve e and conduit 61 to the tank f. The scoop tube b, on the other'hand, has its oiset scoop portion immersed in the oil chamber c4 in the opposite direction to the offset scoop portion of the scoop tube a for the purpose of creating a suction so as to drawiluidthrough the conduit el, the valve e and the conduit b1, into the chamber r, and thence through the scoop tube b, into the oil chamberor storage ohamber c4.

'I'he valve e is arranged in an intermediate position to cut of! communication between both of the conduits a1 and b1 and the conduit en, and is held in this intermediate position by springs e3 and e4. When the valve e is in this intermediate position itmaintains the lling-of the fluid power transmitter in a constant condition. When the hand lever e2, which controls the valve e, is moved to the left, the scoop tube b is .connected to the oil tank f, whereby oil drawn into the oil storage chamber c4. OnV the other hand, when the hand lever e2 is moved toward the right, the scoop tube a is connected to the oil tank f through the valve e, and the conduits e1 and a1, so that the oil is withdrawn from the storage chamber ci inte the oil tank f.

A ller cap c5 isA provided lin the top of the casing shell cs for the introduction ef a sufficient quantity of oil into the storage chamber c4, in yorder to initiate the suction effect of the scoop tube b. It will be seen from Figure 1 that when the casing cs c2 ce rotates with the driving shaft c1, the oil therein forms an oil ring in the peripheral portion thereof under the inuence of centriiugal force.

Extending between the remaining chamber s in the stationary casing p and the conduit a1 is a by-pas's conduit g with a spring-loaded valve g1. This arrangement serves during operation to circulate that part of the working fluid which passes from the'chamber s of the stationary casing p, through the holes n, into the working chamber t lying between the shells c2 and cs. From the working chamber t the uid passes through holesl m, into the storage chamber c4, whence it is recirculated by the scoop tube a, the conduit `ai and the by-pass line g by way of the spring-loaded valve g1'. When the fluid is drained from the transmitter by connecting the scoop tube a with the tank f, the springloaded valve g1 prevents the fluid from returning into the transmitter.z

'Ihe modiiicaticm shown in Figure 3 is similar to the iluid power transmitter shown in Figures l l and 2, except that a single U-shaped scoop tube h is provided in place of the two .separate scoop tubes m and b. 'Ihis U-shaped scoop tube h at its lowest point has a portv h1, through which the fluid passes into or out of the storage chamber c4, depending upon which arm of the U-shaped scoop tube h is connected with the conduit e1 and tank f by means of the control valve e. When the left-hand arm of the U- shaped scoop tube h is so connected, fluid is drawn from the tank, through the valve e and conduit b1, into the chamber r and thence passes downwardly through the port h1, into the storage chamber e4. On the other hand, ii the right-hand arm of the U-shaped scoop tube h is connected with the conduit e1 by means or the control valve e, the iluid in the storage chamber c4 is withdrawn'therefrom through the port hi, into the chamber q, whence it passes through the conduit a1, thercontrol valvee and the conduit e1, into the tank f.

The modification shown in Figure 4 includes a fluid power transmitter similar to that previously described, but having a displacement body i suspended from a cable wound upon the drum k. By raising and lowering the body i the level :ry of the fluid in the tank f can be varied so that the mouth of the filling conduit b1 will be exposed when the uid level drops in response lto the lifting of the displacement body i out of the tank f. When the iuid power transmitter is to be completely or partially filled, however, the dispiacement body i is lowered into the tank f, causing the uid level :ry to rise to or above the mouth of the conduit b1. In modification the conduit a1 extends nearly to the bottom of the tank f, and contains a throttle valve I arranged to prevent too much iluld from returning to the tanlf during normal operation. y

The modication shown in Figure 5 serves a similar purp-ose to the circuit shown 'in Figure 4, but provides an adjustably movable conduit b, in place of the displacement body i. By raising or lowering the adjustable conduit bi by means of the rod ba, the level at which the mouth of the conduit b2 ceases to draw in uid from the tank f can be suitably varied. The movable conduit b,

terconnecting the chambers with the conduit b1.- 'I'he operation of this second by-pass conduit and valve is similar to that of the rst by-pass conduit g and valve g1, previously described. 'Ihe operation of the various forms of the invention has been sumciently described in connection with the construction thereof, and requires no additional explanation.

It will be understood that Idesire to compre-- driven rotor in said working chamber, a stationary casing having a centrally disposed hub-.like portion with iluid intake and outlet compartments therein, stationary scoop tube means having oppositely facing mouths in said storage chamber, said scoop tube means extending inwardly to said hub-like portion and connected respectively for withdrawal of uid from said intake compartment and for delivery of iluid to saidl outlet compartment, a iiuid source, means for connecting said fluid source with said intake and outlet compartments respectively, and a valve'in said connecting means for selectively placing said iluid source in communication with one of said compartments, said storage compartment being adapted to contain a liquid the level gif which is above the level of said mouths at. all

2. In a uid power transmitter, a rotatable casing having intercommunicating fluid storage and working chambers, a driving rotor'and a driven rotor in said working chamber, a stationary casing having iuid intake and outlet compartments, stationary scoop tube means having oppositely yfacing mouths in said storage chamber connected respectively for withdrawal of fluid from said intake compartment and for delivery of iluid to said outlet compartment,- a iluid source, means for connecting said uid source with said intake and outlet compartmentsrespectively, and a valve in said connecting means for selectively placing said uid source in communication with one of said compartments while cutting off communication with the other of said compartments.

3. In a iluid power transmitter, a rotatable casing having intercommunicating uid storage and working chambers, a ldriving rotorand a driven rotor in said working chamber, a stationary casing having uid intake and outlet compartments. stationary scoop tube means having oppositely facing mouths in said storage chamber connected respectively for withdrawal of uid from said intake compartment and for delivery of uid to said outlet compartment, a iluid source, means for connecting said uid source with said intake and outlet compartments respectively, and a valve in said connecting means for selectively placing said fluid source in communication with one of said compartments while cutting oi'i communication with the other of said compartments, said valve being adapted in a neutral position 'to cut of! communication between said source andboth of said compartments, whereby to maintain the iilling of said fluid power transmitter in a constant condition.

'4-. In auid power transmitter, a rotatable casing having intercommunicating uid storage and working chambers, a.` driving rotor and a driven rotor in said working chamber, a stationary casing having av centrally disposed hub-like portion with fluid' intake and outlet compartments therein, and stationary intake and outlet scoop tubes extending inwardly to said hub-like portion and connected respectively tov said intake and outlet compartments and having oppositely directed scoop portions adapted respectively for conduction of iluid from said intake compartment to said storage chamber and for delivery of iiuidfrom said storage -chamber to said outlet compartment, the oppositely directed portion of said outlet scoop tube having an opening which opening is below the level ofthe liquid at all times in said storage chamber.

- 5. In a uid power transmitter, a rotatable casing having intercommunicating iluid storage and working chambers, a driving rotor and a driven rotor in said working chamber, a stationary casing having uidintake and outlet compartments, and a 4U -shaped stationary scoop tube interconnecting4 said intake and outlet compartments and having an intermediate port immersed inthe iiuid in said storage chamber.

6. In a fluid power transmitter, a rotatable casing having intercommunicating iluid storage and working chambers, a driving rotor and a driven rotor in said working chamber, a stationary casing having iiuid intake. and outlet compartments, stationary scoop tube means having oppositely facing mouths in said storage chamber connected respectively for withdrawal of uid from said intake compartment and for delivery of iluid to said outlet compartment, a uid source, intake and outlet conduits for connecting said iluid source with said intake and outlet compartments respectively, a by-pass conduit connected to provide intercommunication between said working chamber and said outlet conduit, and means for regulating ithe passage oi iluid through said by-pass conduit.

,f 7. In a uid power transmitter, a rotatable casing having intercommunicating uid storage and working chambers, la driving rotor and a driven rotor in said working chamber, a stationary casing having fluid intake and outlet compartments, stationary scoop tube means having oppositely facing mouths in said storage chamber connected respectively for withdrawal of iluid from said intake compartment and for delivery of fluid to s aid outlet compartment, a fluid source, intake and outlet conduits for connecting 8. In a uid powertransmitter, a rotatable4 casing having intercommunicating fluid storage and working chambers, a driving rotor and a driven rotor in said working chamber, astationary casing having uid intake and outlet compartments, stationary scoop tube means having oppositely facing mouths in said storage chamber connected respectively for withdrawal of uid' from said intake compartment and for delivery of iluid to said outlet compartment, a fluid source, means for connecting said fluid source with said intake and outlet compartments respectively, a valve in said connecting means for selectively placing said fluid source in communication with one of said compartments while cutting off communication with the other of said compartments, said valve being adapted in a neutral position to out of communication between said source and both of said compartments, whereby tomaintain the filling of said fluid power transmitter in aA constant condition, and means tending normally to urge said valve into said neutral position.

9. In a fluid power transmitter, a rotatable casing having intercommunicating fluid storage and working chambers, a driving rotor and a driven rotor in said working chamber, a. stationary casing having fluid intake and outlet compartments, stationary scoop tube means having oppositely facing mouths in said storage chamber connected respectively for withdrawal of uid from said intake compartment and for delivery of uid to said outlet compartment, a uid source, intake and outlet conduits for connecting said uid source with said intake and outlet compartments respectively, a by-pass conduit connected to provide intercommunication be' tween said working chamber and each of said intake and outlet conduits, and a yieldingly urged valve for regulating the passage of uid through each by-pass conduit. t.

10. In a uid power transmitter, a rotatable casing having intercommunicating uid storage and sworking chambers; a driving rotor and a driven rotor in said working chamber, a stationary casing having uid intake and outlet com-` FRITZ KUGEL.

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