Lubricating and sealing structure and control method of sequential supercharged diesel engine based on supplementary air
A technology of sequential pressurization and sealing structure, which is applied to parts of pumping devices for elastic fluids, mechanical equipment, engine components, etc., can solve problems such as lubricating oil leakage, save energy, improve utilization efficiency, and solve the problem of affected The effect of controlling the lubricating oil leakage of supercharger
Active Publication Date: 2019-06-07
HARBIN ENG UNIV
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[0005] The object of the present invention is to provide a sequential supercharged diesel engine lubricating and sealing structure based on supplementary air that can effectively solve the lubricating oil leakage problem of the controlled supercharger under some working conditions, improve the utilization efficiency of lubricating oil, and greatly reduce energy loss. Control Method
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[0018] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0019] combine Figure 1-2 , a lubricating and sealing structure and control method of a sequential supercharged diesel engine based on supplementary air in the present invention, which consists of a diesel engine body 10, a diesel engine intake and exhaust pipe, an intercooler 9, a basic supercharger, a controlled supercharger, and a gas valve 11 , air valve 8, air supply valve 6, pressure sensor, lubricating oil pump 1, oil return pump 2, etc. The exhaust outlet of the diesel engine is connected to the inlet of the basic turbine 4 and the inlet of the controlled turbine 12 respectively, and the outlets of the basic turbine 4 and the controlled turbine 12 are respectively connected to the atmosphere. The outlets of the basic compressor 7 and the controlled compressor 13 are connected to the inlet of the intercooler; the outlet of the lubricating oil pump 1 is re...
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The invention aims to provide an air-replenishment-based sequential turbocharging diesel engine lubricating sealing structure and a control method thereof. The structure comprises a diesel engine, a basic turbocharger, a controlled turbocharger, a lubricating oil pump and an oil scavenging pump, an exhaust port of the diesel engine is connected with a basic turbine and a controlled turbine which are both communicated with the atmosphere, a basic air compressor and a controlled air compressor are connected with an intercooler which is connected with an air inlet of the diesel engine, the lubricating oil pump is connected with a basic turbocharger communicating shaft lubricating oil inlet and a controlled turbocharger communicating shaft lubricating oil inlet, a basic turbocharger communicating shaft lubricating oil outlet and a controlled turbocharger communicating shaft lubricating oil outlet are connected with the oil scavenging pump which is connected with the lubricating oil pump, and an air replenishing port communicated with an air sealing cavity of the controlled air compressor is arranged on a shell of the controlled air compressor and communicated with an outlet of the basic air compressor. Air in the outlet of the basic air compressor is guided into the air sealing cavity of the controlled air compressor for air replenishment, so that the problem of lubricating oil leakage of the controlled turbocharger under some working conditions can be solved.
Description
technical field [0001] The invention relates to a diesel engine, specifically a marine diesel engine. Background technique [0002] The Sequential Turbo Charging (STC) system is referred to as the STC system. It consists of two or more turbochargers connected in parallel to form a supercharging system. As the speed and load of the supercharged engine increase, they are put into operation sequentially. When the speed or load is lower than a certain set value, cut off the exhaust gas of one or several turbocharger turbines and the air supply of the compressor, so that the exhaust gas flows through the working turbocharger turbines concentratedly, increasing the exhaust gas flow rate and improving the efficiency. Turbine efficiency, so that the energy of exhaust gas can be fully utilized, the boost pressure can be increased, and the fuel economy, power and emission performance of the diesel engine can be improved under low working conditions. And when the engine speed or load ...
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IPC IPC(8): F02B39/14F02B37/007F02B37/16F02B39/00F04D29/08
CPCF02B37/007F02B37/16F02B37/162F02B39/00F02B39/14F04D29/083Y02T10/12
Inventor 王银燕崔欣洁祖象欢杨传雷曹灿周鹏程金鑫李宗营马正茂
Owner HARBIN ENG UNIV