Power plants – Pressure fluid source and motor – Input pump and rotary output motor system having...
Patent
1991-11-15
1993-09-14
Look, Edward K.
Power plants
Pressure fluid source and motor
Input pump and rotary output motor system having...
60491, 60487, 418 31, F16D 3900
Patent
active
052438228
DESCRIPTION:
BRIEF SUMMARY
This invention concerns an oil-operated hydraulic rotary pump-turbine having constrained motion radial blades, and provided with a moving parallelepipedal member having a semicylindrical cavity, which member, by changing the distance thereof relative to the blades by means of a camshaft, changes the fluid flowrate and pressure.
Variable flowrate and variable pressure oil operated hydraulic rotary pumps are already known wherein, by changing the eccentricity of the jacket contacted by the blade edges, the fluid flowrate is modified, or axial or radial piston oil-operated hydraulic pumps where the piston stroke is changed. These pumps have the advantage of precisely changing the fluid flowrate they provide to the oil operated hydraulic motors (turbines) while leakages are kept to a minimum, and they have proved very useful for servo-control as well as for remote control, but they are not suitable as torque converters for motor vehicles.
Such oil operated hydraulic rotary pumps are known, for example, from FR-A-1 168 253 wherein rotors with sliding radial blades are described, which blades may constrainedly be controlled by positive cams and rotate in contact with confronting movable semicylindrical surfaces. This invention relates to a variable flowrate and variable pressure, oil-operated hydraulic rotary "pump-turbine", having constrained motion radial blades, and provided with a moving parallelepipedal member having a semicilindrical cavity, which member, by changing the distance relative to the blades, modifies the fluid flowrate and pressure. This pump, when connected to oil-operated hydraulic rotary motors having radial blades (turbines) identical to said pump, provides a torque variation which enables it to replace the clutch, the mechanical shift gear, or the hydraulic transmission, the Hydromatic converter, or the belt converter having variable diameter pulleys (Variomatic), in motor vehicles.
The pump-turbine according to this invention will be described in detail in the following, referring to the attached drawings of a possible embodiment thereof.
FIG. 1 is an exploded perspective view showing the pump-turbine basic components;
FIG. 2 is a pump-turbine cross section showing a sector provided with a cavity and spaced apart from the blades;
FIG. 3 is the same pump turbine section of FIG. 2, showing the sector provided with a semicylindrical cavity in the position thereof closest to the blade tips;
FIG. 4 shows in a reduced scale the pump connected to an identical pump-turbine, through a distributor-inverter, in a forward gear position;
FIG. 5 is the equivalent of FIG. 4, but in a reverse gear position;
FIG. 6 is the equivalent of FIG. 4, showing the pump hollow sector moved apart from the blades;
FIG. 7 shows schematically the assembly of FIG. 4, connected to the engine of an automotive vehicle;
FIG. 8 shows a pump-turbine connected, through a distributor-inverter to a pair of identical turbines, to obtain the effect of a differential gear; and
FIG. 8a is a cross section along line A-B of FIG. 8.
As it is apparent from FIG. 1, the pump-turbine according to this invention includes a parallelepipedal casing 1 having on the upper surface thereof two openings for operating fluid inlet and outlet, while a pair of opposite removable walls are provided on the inside with a positive cam cavity 7 and with a pair of cavities adapted to receive a rotor shaft 2 and a shaft bearing an off-center cam 6 controlling the reciprocating motions of a sector or member 4 provided with a semicylindrical cavity and with lateral grooves 8 acting as compensating throughflow passages for the operating fluid. Rotor 2 is radially provided with six longitudinally directed slots wherein the same number of flat blades 3 are received, said blades being provided with end pivot pins which are in turn provided with ball or roller bearings adapted to roll within the two opposite cavities 7 used as positive cams.
FIG. 2 shows the cross section of a pump-turbine according to this invention comprising the box-like casing 1 receiving there
REFERENCES:
patent: 2145872 (1939-02-01), Glenn
patent: 2159941 (1939-05-01), Guinness
patent: 2311162 (1943-02-01), Bois
patent: 3187676 (1965-06-01), Hartmann
patent: 3567347 (1971-03-01), Scott
patent: 3598455 (1971-08-01), Schmitz
patent: 3740954 (1973-06-01), Young
patent: 4901529 (1990-02-01), Iino et al.
Look Edward K.
Nguyen Hoang
LandOfFree
Hydraulic rotary pump-turbine as a torque converter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic rotary pump-turbine as a torque converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic rotary pump-turbine as a torque converter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2019818