| 摘要 |
The utility model relates to transport machine building. A hydraulic system of hydro-mechanical volumetric transmission of caterpillar machine has two vehicle-borne hydro-volumetric transmissions (HVT), each of those consists of hydraulically connected to each other with closed power circuit of controlled radial-piston hydro-pump and non-controlled radial-piston hydro-motor, hydraulically connected top safety and back valve and kinematically connected to one of two planetary hydro-mechanical gear-boxes (GB), each of those is equipped with distribution mechanism (DM), hydraulically connected to both DM supercharge pump and tow pump (TP) equipped with autonomous drive, exhaust pumps (EP), feeding pump, this is equipped with overflow valve (OV) and oil tank common for both, GB and HVT. OV is arranged as two-cascade, in parallel to the first control cascade controlled two-position two-stroke hydro-dispenser is connected, and the second one, the power cascade is arranged as cup that is in contact with conical seat, in the bottom of that one throttling opening is provided, and in the side wall windows are provided, those are connected to feeding mains. The cup is surrounded with two circular hydraulically disconnected one from another cavities, one of those is connected to feeding mains, and the other - to suction line of feeding pump and to discharge to tank. Each HVT is connected through control two-position four-stroke hydro-dispenser to one of TP, and through throttle and control two-position six-stroke hydro-dispenser - to TP with discharge to tank.
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