RU2801682C1 - Double-circuit cooling system for engine of gas-piston electric unit - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: dual-circuit cooling system for the engine of a gas-piston electric unit is proposed. The internal circuit is configured to cool the engine and contains an internal circuit water pump connected to the internal circuit pressure gauge; the external circuit is configured to cool the charge air, the coolant of the internal circuit and the oil of the engine lubrication system and contains a receiving valve, an external circuit water pump connected to the external circuit check valve, a charge air cooler, an oil-to-water cooler, a water-to-water cooler, a temperature controller, configured to separate the flows and, depending on the temperature of the coolant of the internal circuit, redirect part of the flow of the coolant through the external cooling circuit to the pump of the internal cooling circuit. Circulation of the coolant of the internal circuit is provided by the water pump of the internal circuit through the line supplying the coolant to the engine through separate nozzles. The coolant of the external circuit is supplied by the water pump of the external circuit through the intake valve, taking water from the water supply source and directing it through the check valve to the charge air cooler, through the water-oil cooler it enters the water-to-water cooler, from which it returns to the water supply source.

EFFECT: expansion of the range of gas-piston electrical units with a dual-circuit engine cooling system.

2 cl, 1 dwg

Description

The invention relates to electrical engineering.

An electric machine with a two-jet ventilation system is known from the prior art, containing a stator housing with air inlet and outlet windows located in the upper part, an air cooler unit (with a closed ventilation cycle) or an air preparation unit (with an open ventilation cycle), characterized in that the unit air coolers and the air preparation unit are made in the form of interchangeable units mounted on the stator housing (RU 37439 U1 2004.04.20).

The liquid cooling system of the stators of electrical machines, containing coolers, each of which consists of a tube inside which the coolant flows, and a cooler housing, characterized in that the liquid cooling system of the stators of electrical machines is equipped with coolers, each of which consists of a copper cooler housing and a copper a tube inserted into the cooler housing, a pump, a collector and a heat exchanger, each cooler with a coolant is placed without a gap between the sections of the stator magnetic circuit, divided along the length, while the pump is connected to a collector configured to supply coolant in parallel to all coolers, and the coolers are made with the possibility of supplying the heated coolant emitted by the heat of the stator of the electric machine through copper pipes to the outlet part of the collector, and the collector is connected to a heat exchanger, which is made with the possibility of supplying the liquid after cooling again to the inlet part of the collector (RU 2439768 C2 2012.01.10) .

Diesel electric unit containing a water-cooled engine, a DC generator connected to the engine crankshaft by a kinematic connection, including drive wheels mounted on the axes of the crankshaft and generator, and an intermediate wheel placed between them, characterized in that the unit is equipped with an external casing with controlled louvres in the side wall, the cavity of the casing is filled with vibration-absorbing material, a swivel cover is made in the upper wall of the casing, the unit is equipped with an expansion tank and an additional thermostatic water tank connected to the expansion tank, the drive wheels and the intermediate wheel are made in the form of pulleys connected to each other by a V-belt drive, the unit is also equipped with a mechanism for tensioning and compensating vibrations of the engine and generator in the form of a vertical coil spring connected to the frame frame of the unit and the rotary axis of the intermediate pulley (RU 2256084 C1 2005.07.10).

An electric machine with liquid stator cooling contains a stator core with a winding, end shields and a rotor with a shaft. The core is made of sheets of electrical steel. Sealed axial channels are made in its back, interconnected by means of manifolds used to supply and discharge liquid cooled in an external heat exchanger (RU 2687560 C1 2019.05.15).

Scheme of the engine cooling system, containing a small circle of coolant circulation, including a water pump, a cylinder block, a cylinder head, a thermostat, and a large circle, including a water pump, a cylinder block, a cylinder head, a thermostat and a radiator, characterized in that between the thermostat and the radiator includes a hydraulic turbine with a fan mounted on one shaft (RU 2214524 C2 2003.10.20).

The technical problem is to expand the arsenal of gas-piston electrical units with a dual-circuit engine cooling system.

The technical result consists in solving the above technical problem, which is a consequence of the implementation of the purpose of the claimed device.

The specified technical result is achieved in a dual-circuit cooling system of the engine of a gas-piston electric unit, containing internal and external cooling circuits. The internal circuit is configured to cool the engine and contains an internal circuit water pump connected to the internal circuit pressure gauge; the external circuit is configured to cool the charge air, the coolant of the internal circuit and the oil of the engine lubrication system and contains a receiving valve, an external circuit water pump connected to the external circuit check valve, a charge air cooler, an oil-to-water cooler, a water-to-water cooler, a temperature controller, made with the possibility of separating flows and, depending on the temperature of the coolant of the internal circuit, redirecting part of the flow of the coolant through the external cooling circuit to the pump of the internal cooling circuit, while the circulation of the coolant of the internal circuit is performed by the water pump of the internal circuit through the line supplying the coolant to the engine through separate nozzles, the external circuit coolant is supplied by the external circuit water pump, through the intake valve, taking water from the water supply source and directing it through the check valve to the charge air cooler, through the oil-water cooler it enters the water-to-water cooler, from which it returns to source of water supply.

An additional feature is that the dual-circuit cooling system contains a standby external circuit pump.

The claimed invention is illustrated in the graphic material, where figure 1 shows a schematic diagram of a dual-circuit cooling system for the engine of a gas-piston electric unit.

Symbols of the positions of figure 1: H7001 - water pump of the outer circuit; H7002 - electric pump unit (reserve); KO7001 - check valve; KO7002 - intake valve; KO7003 - inlet valve of the reserve pump; GS7001 - rubber compensator; AT1001 - air cooler; AT4001 - water-oil cooler; AT6001 - water-to-water cooler; RT6001 - temperature controller; H6001 - water pump of the internal circuit; K6001 - check valve; Ts1 ... Ts8 - engine cylinders; KTs1 ... KTs8 - cylinder covers; TC - turbocharger; B7001 - source of water supply of the external circuit; B6001 - expansion tank of the internal circuit; B6002 - tank for draining the internal circuit; KVS6001 - air vent valve; VK7001, VK6001, VK6002, VK6011 ... VK6018 - thermal resistance; МН6001 - pressure gauge; KSh7001, KSh6001, KSh6002 - ball valves; A5 - panel of pressure transducers (VR6001 and VR7001); A6 - alarm and protection instrument panel (SPF6001 and SKF6002); SLH6001 is a level sensor.

The claimed cooling system is designed to remove heat generated during engine operation and is a two-circuit system containing internal and external cooling circuits.

The internal circuit coolant cools the engine: cylinder liner, cylinder head and turbocharger, while the external circuit cools the charge air, internal circuit coolant and engine oil.

The internal circuit coolant is circulated by the internal circuit water pump H6001 through the coolant supply line to the engine. Through the branch pipes extending from the line, the coolant enters the casings of the cylinder liner. After the cylinders have cooled, the coolant passes into the cylinder heads.

For cooling the turbocharger, the coolant enters through a separate pipe. From the cylinder covers and from the turbocharger, the coolant is collected through pipes into the outlet line. From the outlet line, the coolant enters the temperature controller PT6001. The temperature controller works on the principle of flow separation. Depending on the water temperature of the internal circuit, it directs part of the water flow through the water-to-water cooler of the external circuit AT6001 to the suction of the internal circuit pump H6001, and sends part of the flow directly to the suction of the internal circuit pump H6001.

The higher the temperature of the water in the internal circuit at the engine outlet, the more water passes through the water-to-water cooler of the external circuit AT6001.

To compensate for losses of coolant from evaporation and leaks, an expansion tank B6001 is included in the internal circuit of the cooling system, from which the internal engine cooling circuit is filled and replenished.

When highly heated surfaces come into contact with the coolant, the formation of a steam-water fraction is possible, which returns to the expansion tank from the outlet line of the internal cooling circuit through a separate pipeline.

To keep the generating set ready for fast load acceptance, it is possible to connect the heating of the internal cooling circuit of the engine.

The heating operation is provided by the check valve of the internal circuit K6001.

The pressure of the coolant of the internal circuit at the inlet to the engine is controlled by the pressure gauge of the internal circuit MH6001, installed in the engine instrument panel.

The coolant of the external circuit is taken by the water pump of the external circuit H7001, through the intake valve KO7002, from the water supply source B7001 and through the check valve of the external circuit KO7001 is sent to the charge air cooler AT1001. Then it enters the AT4001 water-to-water cooler and then to the AT6001 water-to-water cooler, from which the water of the external circuit returns to the B7001 water supply source. The scheme provides for the connection of a backup pump of the external circuit.

Cooling system sensors SLH6001, SPF6001, SKF6002, BK6001, BK6011…BK6018, BP6002, BP7001 are designed to work in control systems, alarm and protection systems, instrumentation.

Claims (6)

1. A dual-circuit cooling system for the engine of a gas-piston electric unit, containing internal and external cooling circuits, characterized in that the internal circuit is configured to cool the engine and contains an internal circuit water pump connected to the internal circuit pressure gauge, an expansion tank connected to the internal circuit water pump to compensate for coolant losses from evaporation and leaks, and a tank for draining the internal circuit; the external circuit is configured to cool the charge air, the coolant of the internal circuit and the oil of the engine lubrication system and contains a receiving valve, an external circuit water pump connected to the external circuit check valve, a charge air cooler, an oil-to-water cooler, a water-to-water cooler, a temperature controller, made with the possibility of dividing the flows and, depending on the temperature of the coolant of the internal circuit, redirecting part of the flow of the coolant through the external cooling circuit to the pump of the internal cooling circuit, at the same time, the circulation of the coolant of the internal circuit is performed by the water pump of the internal circuit through the line supplying the coolant to the engine through separate nozzles, the coolant of the external circuit is supplied by means of the water pump of the external circuit, through the inlet valve, taking water from the water supply source and directing it through the check valve to the charge air cooler, through the oil-water cooler it enters the water-to-water cooler, from which it returns back to the water supply source. 2. A dual-circuit cooling system for the engine of a gas-piston electric unit according to claim 1, characterized in that it additionally contains a backup pump of the external circuit.