FIELD: machine building.
SUBSTANCE: system contains circuit of heat preparation of the hydraulic drive comprising standard hydraulic tank, pump, hydraulic distributor, hydraulic engine. Small hydraulic tank with heat exchanger is connected by two hydraulic lines with standard hydraulic tank. The first hydraulic line has control valve and pump. The second hydraulic line has check valve and pump. Heat exchanger of the small hydraulic tank is connected with exhaust system of the road and construction machines, which contains shutter to direct flow of the exhaust gases to the heat exchanger of the small hydraulic tank. Standard hydraulic tank and small hydraulic tank are connected with the hydraulic cylinder via the slide valve, pump and hydraulic distributor.
EFFECT: reduced time of heat preparation of the hydraulic drive of the road and construction machine, and increased service life of the hydraulic system elements.
1 dwg
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