Power plants – Pressure fluid source and motor – Coaxial impeller and turbine unit
Patent
1987-12-16
1989-06-27
Garrett, Robert E.
Power plants
Pressure fluid source and motor
Coaxial impeller and turbine unit
60330, F16D 3300
Patent
active
048417297
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a thrust force reduction device for torque converter, and espcially to device for reducing thrust force produced by fluid flow in the torque converter.
BACKGROUND ART
FIG. 3 shows a schematic view of a prior art type torque converter. In FIG. 3, numeral 100 is a casing, fluid 102 flows inside the casing 100 by prescribed pressure P. A turbine shaft 104 fits rotatably in casing 100, and a sealing part 106 keeps on shaft 104 casting 100 in liquid-tight condition.
In the prior art showing FIG. 3, a thrust force occurs in the torque converter, and the thrust force presses the casing 100 in the direction of arrows A.
DISCLOSURE OF THE INVENTION
An object of the invention is to provide a thrust force reduction device for torque converter, which can reduce the thrust force as it occurs in the torque converter.
COMPOSITION OF THE INVENTION
(1) Technical measure
The present invention relates to a thrust force reduction device for torque converter comprising a pump rotor connected to the crankshaft of an engine, a turbine rotor connected to a turbine shaft and disposed to oppose the pump rotor, and having at least one stator and a fixed cylindrical shaft fitted to a boss of the pump rotor in liquid-tight condition; characterized by that a seal element is fixed to the turbine shaft and produces a thrust reactional force which cancels the thrust force which occurs in the torque converter; the seal element is disposed to face a fluid chamber which receives hydraulic fluid exhausted from the turbine rotor, and the seal element is disposed between the turbine shaft and the engine crankshaft, in liquid-tight condition.
(2) Function
A hydraulic force is received by the seal element which produces thrust reactional force which acts in a direction to cancel the thrust force.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partly sectional fragmentary view of a torque converter with the device of the present invention;
FIG. 2 is a schematic illustration of the structure in FIG. 1;
FIG. 3 is a schematic illustration of a prior art torque converter.
BEST MODE FOR CARRING OUT THE INVENTION
In FIG. 1 shows a three-element one-stage type torque converter to which the present invention is applied for an industrial or architectural vehicle, for example, an numeral 10 is an input guide. This input guide 10 connects to a flywheel, not shown, by a thin-disc shaped flex-plate 12(flexible plate).
A front cover 14 is provided so as to oppose to the flex-plate 12, then the front cover 14, the input guide 10 and the flex-plate 12 are fixed by a bolt 16. The front cover 14 connects to a pump shell 20 of a pump rotor 18 at an outer-peripheral part. A inner-peripheral part of the pump shell 20 is welded on a pump hub 22.
A turbine rotor 24 is provided so as to oppose to the pump rotor 18, a turbine shell 26 of the turbine rotor 24 is fixed to a turbine hub 28 at inner-peripheral part. Inner spline teeth 28a are formed on the turbine hub 28, the inner spline teeth 28a are fitted to outer spline teeth 30a of a turbine shaft 30. A power-output gear 31 is fixed to the turbine shaft 30 at the right end of the turbin shaft 30.
A stator 32 is installed between the pump rotor 18 and the turbine rotor 24, inner spline teeth 34a are formed on a boss 34 of the rotor 32. These inner spline teeth 34a are fitted to outer spline teeth 36a of a fixed cylindrical sleeve 36. The fixed cylindrical sleeve 36 connects to a bulk head 38 which connected to the housing.
A bearing 40 is interposed between the fixed cylindrical sleeve 36 and the pump hub 22. To the right of and near by the bearing in FIG. 1, the fixed cylindrical sleeve 36 is provided with seal ring 42. Therefore, an inner surface 22a (its diameter is D1) of the pump hub 22 fits onto an outer surface 36b of the fixed cylindrical sleeve 36 rotatably in liquid-tight condition.
An oil passage 44 is bored in a body of the fixed cylindrical sleeve 36, and a left end of the oil passage 44 connects through to a hole 46. A thrust roller bearing 48 i
REFERENCES:
patent: 3360935 (1968-01-01), Schneider
patent: 3677003 (1972-07-01), Schneider
patent: 3721090 (1973-03-01), Ahlen
patent: 4049093 (1977-09-01), Vukovich et al.
patent: 4671062 (1987-06-01), Ohkubo
Garrett Robert E.
Kabushiki Kaisha Daikin Seisakusho
Williamson Mark A.
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