LiuGong CLG835H, Руководство по обслуживанию

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Structure Function Principle
January 24, 2017
Torque Converter - Gearbox System CLG835H
We can see from structure diagram for torque converter, a three-element, single-turbo torque converter
mainly consists of pump wheel, guide wheel and a turbine. As the pump wheel of torque converter is
directly coupled with and driven by the engine, the hydrodynamic drive oil between pump wheel and tur-
bine forms complex flow under rotation of pump wheel. The mechanical energy is converted into kinetic
energy of oil fluid. The fluid flow with kinetic energy strikes against the turbine at a high speed. The tur-
bine absorbs its kinetic energy and restores it to mechanical energy for gearbox. The guide wheel is sta-
tionary. When the fluid flow(which is from the turbine and has some kinetic energy) passes through the
curved blade of the guide wheel, the torque formed by the impact force and counterforce produced on
the blade acts on the engine base, and equivalent to the sum of increased torque of turbine from coun-
terforce and reduced torque of pump wheel from impact force. It is possible that the output torque of tur-
bine is greater than input torque of pump wheel, based on which, the torque converter is variable.
The working oil of torque converter is imported into the torque converter through the coarse and fine fil-
ters from the oil tank by the variable pump. There is a constant pressure valve (safety valve) set at the
inlet of torque converter, whose main role is to avoid excessive pressure in the torque converter to dam-
age the parts. There is another constant pressure valve (back pressure valve) at the outlet of torque con-
verter, whose main role is to ensure the torque converter is full of working oil in order to avoid cavitation
appeared during operation and impact on the performance of torque converter.
Figure 3-10Schematic diagram for torque converter hydraulic
Hydraulic torque converter
Outlet constant
pressure valve of
torque converter
Radiator
Rough
filtration
Tank
Engine Transmission
—shaft lubrication
Inlet constant
pressure valve
of torque converter refined
filtration
Front pump
P18T00010