DE628545C - Fluid change gear like the Foettinger gear with strongly changing torque - Google Patents

Description

GERMAN EMPIRE

ISSUED ON APRIL 6, 1936

REICH PATENT OFFICE

PATENT LETTERING

JVi 628545 CLASS 47h GROUP

Aktiebolaget Ljungström's Angturbin in Stockholm *)

Fluid change gear based on the Föttinger type with strongly changing torque.

Patented in the German Empire on October 29, 1927

The invention relates to a fluid change transmission according to the type of Föttinger gearbox · and consists in the one defined by the claim ι designated association of the specified features, through which this type of Gearboxes made particularly suitable for use in land and motor vehicles should be, namely by flattening the efficiency curve. An appropriate training

ίο leadership is in the only in conjunction with Claim 1 denotes applicable claim 2.

In Figs. 1 to 4 an example is the

Overall arrangement according to the invention and details shown.

Fig. Ι shows a blade of the turbine parts. The streamlines are partly with Starting, partly shown when going through the turbine.

All turbine wheels are designed as reaction wheels.

Fig. 2 shows an embodiment of the invention applied to an automobile. A is the motor, B the fluid gear with a reversing gear C. D is the coolant pump, which distributes the coolant to the engine ^ 4 and to the gear ^. Both parts are connected to the cooler E by pipelines. In this case, the engine's coolant is used as the working medium in the transmission, which is forced to circulate either by a pump or by self-circulation. If you wish to put the gear unit under overpressure to avoid the risk of cavitation, this can be done by means of suitable throttling in pipes F and G.

Fig. 3 shows a longitudinal section through the actual transmission in an embodiment that is suitable for automobiles. Fig. 4 shows ■ a cross section of the same. To reduce the number of wheels, the Turbine designed as a radial turbine, ι is the pump impeller together with its blade rings2 and 3, the number of which in this case is two. 4, 5, 6 and 7 are the running rings of the turbine. 8 and 9 are the guide vanes the turbine. The impeller is mounted on a shaft 10, which is in two ball bearings is stored, of which the larger absorbs the axial pressure. This shaft is by a tight coupling with the motor '

*) The patent seeker stated as the inventor:

AIf James Rudolf Lysholm in Stockholm.

wave · ίο connected. For sealing is a Stuffing boxes, expediently a piston ring stuffing box, provided. "The spaces 12 and 13 are filled with liquid and through the Pipes 14 and 15 with the cooling water system of the motor connected. 16 is a throttle valve that may be required to achieve the To put the housing of the gearbox under overpressure.

Through the compensation holes 17 in the pump housing the vessel 12 is connected to the transmission. To the cooling of the transmission to effect, the conductive liquid from the equalizing piston 18 of the pump in the groove 19 and collected through the hole or holes 20 in the liquid container 13 derived. The container aa is below designed as a sedimentation tank to remove the impurities from the cooling liquid To give an opportunity to break away. All of the turbine blades are on a single disk 21 attached, which in turn is attached to the shaft 22. Around the shaft 22 is also provided with a stuffing box, for example of the type already mentioned,

. A reversing gear 23 of known type is used for reversing. Would be to facilitate the switchovers, to be entrained by the tendency of the turbine disk 21, during idling of the pump, ER I sword be, the shaft is provided with a brake disc 25 22, which can be brought from the driver's seat to a standstill.

Of course, the pump and turbine can also be perpendicular to the shafts be arranged standing to each other. This arrangement is likely for the locomotives be most expedient. Likewise, the turbine can be used as an axial turbine or as a combined radial and axial turbine are executed.

Claims (2)

Patent claims: i. Fluid change gear according to the type of Föttinger gear with strongly changing Torque, especially for land vehicles and motor vehicles one or more driving and several driven turbine wheels, thereby characterized in that the turbine blades are designed as reaction blades and their in the direction of rotation Infeed edges that are offset in relation to the run-off edge are rounded off with a short, thick head. 2. Liquid change gear according to claim i, characterized in that the discharge angle of the turbine blades are equal to 20 ° or greater to 45 ^0th 1 sheet of drawings