A Generator Cooling System Utilizing Marine Diesel Engine Bypass Exhaust Gas

Abstract

The purpose of the present invention is to provide a generator cooling system that utilizes marine diesel engines to bypass exhaust gas, including an air heat exchanger and a cooling water heat exchanger, and the exhaust pipe of the diesel engine is connected to the first turbine and the second turbine respectively through a bypass valve , the first compressor is connected to the intercooler, the intercooler is connected to the blower, and is connected to the scavenging box through the first one-way valve, the blower is connected to the scavenging box through the first solenoid valve, and the scavenging box is connected to the intake pipe of the diesel engine, and the second The compressor is connected to the air heat exchanger, and the air heat exchanger is respectively connected to the second one-way valve and the pressure tank. The pressure tank is connected to the generator through the second solenoid valve and the expansion valve. The outlet of the cooling water tank is connected to the cooling water heat exchanger through the cooling water pump. The cooling water heat exchanger is connected to the generator through the cooling water filter, and the generator is connected to the cooling water tank. The invention can fully solve the generator cooling problem of the diesel generating set under different working conditions, and improve the efficiency of the generator.

Description

technical field [0001] The invention relates to a diesel generator, in particular to a cooling system of the diesel generator. Background technique [0002] There is resistance between the rotor coil and the stator coil of the generator. When the generator is working normally, the stator coil and the rotor coil will generate heat. The temperature increase inside the generator will affect the performance of the generator, such as efficiency, output power, etc., and the research on the heat dissipation efficiency of the generator has always attracted attention. The heat dissipation of marine generators generally adopts water cooling. The cooling water flows through the rotor and stator of the generator to take away the heat generated by the generator to ensure the normal operation of the generator. [0003] When the diesel engine is working at low load, the turbine can make full use of the energy of the exhaust gas exhausted by the diesel engine, but when the diesel engine is...

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Problems solved by technology

[0003] When the diesel engine is working at low load, the turbine can make full use of the energy of the exhaust gas exhausted by the diesel engine, but when the diesel engine is working at a load higher than 80%-85%, due to the increase of the exhaust volume, the energy of the exhaust gas will also increase, which will lead to an increase in the speed of the turbine , in order to ensure that the turbine will not overspeed, the exhaust gas flow into the turbine is controlled by the waste gas bypass method, and the bypass exhaust gas loses a part of energy because it does not pass through the turbine to do work

[0004] When the load of the diesel generator set is higher than 80%-85%, part of the energy of the exhaust gas of the diesel engine will be wasted, and the heat of the generator cannot be taken away in time, so the cooling effect of the current generator is not good at high load, which affects to generator performance and efficiency

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