RECIPROCATING ENGINE CLOSED-CIRCUIT LIQUID COOLING SYSTEM Russian patent published in 2023 - IPC F01P11/02 F01P3/20 F01P7/16 

FIELD: reciprocating engine cooling systems.

SUBSTANCE: invention may be used in reciprocating engine cooling systems. A reciprocating engine closed-circuit liquid cooling system contains an expansion tank (1), radiator (6) with thermostat (7), circulation pump (9) and coolant deaeration device (10) with a gas phase outlet pipe. The expansion tank (1) is designed with a sealed casing (2) and partition (3) installed in the sealed casing (2) to form liquid and gas cavities (4) and (5). The radiator (6) with thermostat (7) is connected to the reciprocating engine cooling cavities (8) via the radiator outlet. The circulation pump (9) is connected to the expansion tank (1) liquid cavity (4) via the pump inlet and to the radiator (6) inlet via the pump outlet. The coolant deaeration device (10) with a gas outlet pipe is installed in a closed circulation loop. The system contains a deaeration tank (19) with closed cavity (20) partially filled with coolant and connected to the deaeration device (10) gas phase outlet pipe. The coolant deaeration device (10) is designed as a flow line with longitudinal spiral slots connected between the circulation pump (9) outlet and the radiator (6) inlet, and a hollow body encompassing the flow line. The hollow casing flow line consists of two cone-shaped surfaces connected via cylindrical surface. The flow line is internally connected to the gas phase outlet line via a controlled normally closed valve (18). The expansion tank (1) partition (3) is designed as a membrane, which is fixed to the periphery edge (21) of the expansion tank (1) sealed casing (2). The expansion tank (1) gas cavity (5) and the deaeration tank (19) gas cavity (22) have safety valves (23). The expansion tank (1) gas cavity (5) is connected to the gas pressure source (24).

EFFECT: invention provides possibility to improve the cooling of heat-stressed parts of a reciprocating engine in every operating mode by ensuring a continuous coolant deaeration process.

1 cl, 2 dwg