HYDRAULIC SYSTEM OF MULTIRANGE MULTITRAIN ELECTROMECHANICAL TRANSMISSION Russian patent published in 2015 - IPC F15B15/02 

FIELD: machine building.

SUBSTANCE: under the first option the hydraulic system has crankcase (1) with build-in coarse filter (2), two pumps (3) and (4) supplying the first and the second circuits, respectively. To the discharge main (5) of the first pump (3) the safety valve (6), filter (7) comprising filtering element (8) and safety valve (9), are connected, as well as hydraulic control valve (10), controlled by drives (11) and (12), and having springs (13) and (14) holding it in the neutral position. The discharge main (5) is connected with the executive hydraulic cylinder of 2-directional operation (15) connected with the crankcase (1) via the drainage main (16), and oil mains of cooling and lubrication of the electric machines (17) and transmission mechanical assemblies (18). Under the first option to the discharge main (19) of the second pump (4) the oil cooler (20) with safety valve (21) and heat exchanger of the control unit (22) with safety valve are connected (23). Under the second option in the discharge main (19) of the second pump additionally filter (25) is installed, it contains the filtering element (26) and safety valve (27). The discharge main (19) is divided to the discharge mains (28) and (29). In the discharge main (28) a pressure regulator (30) is installed to maintain pressure in the discharge main (29). The discharge main (29) is connected with additional hydraulic drives: clutch drive (31) comprising one-way action hydraulic cylinder with return spring (32) controlled by the hydraulic control valve (33) switched on by the drive (34) and returned to neutral position by the spring (35), and drive of power take-off box (36) comprising one-way action hydraulic cylinder with the return spring (37) controlled by the hydraulic control valve (38) switched on by the drive (39) and returned to neutral position by the spring (40). Drainage mains of secondary units (41) are connected with the crankcase (1).

EFFECT: increased reliability of drive.

23 cl, 8 dwg