poly-phase hydro-kineamtic torque convertor

8/7/2019 Poly-phase Hydro-kineamtic Torque Convertor

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POLY-PHASE HYDRO-KINEAMTIC

TORQUE CONVERTOR


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OBJECT :-

TO EXTEND THE HIGH EFFICENCY SPEED RANGE OF THE SIMPLE3-ELEMENT CONVERTOR

BY ALTERNATING THE VANE (OR)BLADE SHAPES OF ONE

ELEMENT

HOW THE HIGH SPEED RANGE IS EXTENDED?

NORMALLY THE STATOR IS CHOOSEN AS THE FLUID

ENTRANCE DIRECTION CHANGES WITH INCREASED TURBINE

SPEED

TO ACHIEVE THIS, THE STATOR IS DIVIDED INTO A NO OF

SEPARATE PARTS (IN THIS CASE 3)

EACH ONE BEING MOUNTED ON ITS OWN FREE-WHEEL

DEVICE, INTO ITS HUB


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THE TURBINE EXIT Vt

& } PRODUCE AN EFFECTIVE RESULTANT VELOCITY VrLINEAR VELOCITY VL

Vr CHANGES ITS DIRECTION OF ENTRY BETWEEN STATOR

BLADES AS THE IMPELLER AND TURBINE RELATIVE SPEEDS

APPROACH UNITY


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POLYPHASE TORQUE CONVERTER


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INTIAL PHASE:

UNDER STALL SPEED CONDITIONS,THE FLUID FLOW

FROM THE TURBINE, TO THE STATOR

SUCH AS TO BE DIRECTED ONTO THE

CONCAVE(REAR) SIDE OF ALL 3 SECTIONS OF THE

DIVIDED STATOR BLADES

THUS PRODUCING OPTIMUM STATOR REACTION

FOR MAXIMUM TORQUE MULTIPLICATION

CONDITIONS


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SECOND PHASE :

AS THE TURBINE BEGINS TO ROTATE AND THE VEHCLE IS

PROPELLED FORWARD

THE FLUID CHANGES ITS RESULTANT DIRECTION OF ENTRY TO THE

STATOR BLADES.

SO THAT IT IMPINGES AGAINST THE REAR CONVEX SIDE OF THE

FIRST STATOR BLADES S1

THE REACTION OF THIS MEMBER IS NOW REVERSED SO THAT IT IS

RELEASED

ABLE TO SPIN IN THE SAME DIRECTION AS THE INPUT AND OUTPUT

ELEMENTS

THE TWO REMAING FIXED STATORS NOW FORM THE OPTIMUM

BLADE CURVATURES FOR HIGH EFFICIENCY


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THIRD PHASE :

WITH HIGHER VEHIICLE & TURBINE SPEEDS

THE FLUIDS RESULTANT DIRECTION OF ENTRY TO

THE 2 REMAIING HELD STATORS

CHANGES SUFFICIENTLY TO PUSH FROM THEREAR OF THE SECOND SET OF STATOR BLADES S2

THIS SECTION WILL NOW BE RELEASED

AUTOMATICALY

TO ENABLE THE 3RD SET OF STATOR BLADES TO

OPERATE WITH OPTIMUM EFFICIENCY


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COUPLING PHASE :

TOWARDS UNITY SPEED RATIO, WHEN THE TURBINE

SPEED HAS ALMOST CAUGHT UP WITH THE IMPELLER

THE FLUID ENTERING THE 3RD STATOR BLADES S3, WILL

HAVE ALTERED ITS DIRECTION TO SUCH AN EXTENT

THAT IT RELEASES THIS LAST FIXED SET OF BLADES

SINCE THERE IS NO MORE REACTION TORQUE

CONVERSION CEASES & THE INPUT AND OUT PUT

ELEMENTS ACT SOLELY AS A FLUID COUPLING

poly-phase hydro-kineamtic torque convertor

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