How a Torque Divider Works ( cara kerja torque divider)
How A Torque Divider Works
Function of Torque Divider
Fuction of torque divider
1.Transfer power to transmission.
2. Provides Hydraulic.
The track type tracktor use a torque to transfer engine to the transmission.The torque divider in this view is mounted to a 3408 engine. The torque divider is similar to those used on other Cat track type tracktor except the torque divider is also eqqipped with a freewheel stator.
The Torque Divider provides both a hydraulic and a mechanical connection from the engine to the transmission.The torque converter provides the hydraulic connection, while the planetary gear set provides the mechanical connection.During operation, the planetary gear set and the torque converter work the together to provide an increase in torque as the load on the machine increases.
image-torque-divider
Torque Divider Operation
This illustration shows the torque divider that is ,used in both versions .The impeller rotating housing,and sun gear are shown in red.Theses components are on a direct mechanical connection to the engine flywheel (also shown is red).The turbine and ring gear , shown in blue and connected.The planetary carrier and output shaft shown in purple, are also connected.The stator and carrier are shown in green.The planetary gear and shafts are orange.Bearings and the lockup mechanism for the stator are shown in yellow.
During NO LOAD, components rotate as unit
Because the sun gear and the impeller are connected to the flywheel, they will always rotate at engine speed.As the impeller rotates, it directs oil againts the turbine blades, causing the turbine to rotate.Turbine rotation causes the ring gear rotate.During NO LOAD conditions, the components of the planetary gear set rotate as a unit at the same rpm.The planets gears do not rotate on their shafts.
Under Load, relative motion slows turbine rotation
As the operator loads the machine, the output shaft slows down. A decrease in outpit shaft speed causes the rpm of the planetary carrier to decrease. Decreasing the planetary carrier rotation cause the planet gears rotate.Rotating the planetary gears decrease the rpm of the ring gear and the turbine.At this point, the torque converter multiplies torque and the planetary gear set splits the torque.
During stall, turbine and ring gear rotate invthe opposite direction.
An extremely heavy load can stall the machine.If the machine stalls, the output shaft and the planetary
carrier with not rotate .This is condition causes the ring gear and turbine to slowly rotate in the opposite direction of engine rotation.Maximum torque multiplication is achived just as the ring gear and turbine begin to turn in the opposite direction.
Frewheel Stator Components ,cam , rollers , springs
The torque divider is also eqqipped with a freewheel stator.The stator is splined to a cam which
rotates around the stationary carrier in only one direction. Machined into the cam are tapered opening which contain rollers and springs. Spring force holds the rollers againts the tapper and carrier and restricts the cam from turning.
Stator Held Stationary when machine is under a load
When the machine is under a load, and impeller
and turbine are rotating the different speeds, the stator ia held stationary because the rollers are wedged in the tepper of the oppening by spring force .
This mechanical connection keeps the stator stationary and allows oil flow the be directed back to the impeller and multiply the torque.
Torque Converter provides 75% of output
During all load conditions, the torque converter provides 75 % of the output ,and the planetary gear
set provides 25 % of the output. The size of the planetary gears established the torque split between the hydraulic torque and mechanical torque.
Stator rotates with turbine and impeller at higher speed
When the machine speed increase with no load, the speed off the turbine and impeller increase.During this condition, the stator does not need to redirect oil back to the impeller. The stator begins to turn in the same direction as the impeller and turbine and moves the roller from the tapered opening againts the spring pressure.
The mechanical connection between the cam and the stationary carrier is broken.The stator, turning freely with the turbine and impeller , wil reduce turbelance of the oil in the torque converter permits the engine to work easier to reduce fuel consumtion and minimazes heat build up in the power train oil ststem.
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