Turbine pressurizing system with adjustable rotating speed of gas compressor

Abstract

The invention relates to a turbine pressurizing system with adjustable rotating speed of a gas compressor. The turbine pressurizing system comprises the gas compressor, an engine, a turbine, a gas compressor connecting shaft, a turbine connecting shaft and gears, wherein a first gear and a second gear are both arranged on the gas compressor connecting shaft, the gear number of the first gear is less than that of the second gear, a third gear is arranged on the turbine connecting shaft, and the second gear is meshed with the third gear. When the engine is in a low-speed working condition, the first gear and the third gear are meshed by a control mechanism, the rotating speed and the efficiency of the gas compressor are both high, the engine has high air inflowing rate, combustion is good and the performances of the complete machine are excellent; when the engine is in a high-speed working condition, the second gear is meshed with the third gear by the control mechanism, the gas compressor has low rotating speed, the engine has low air inflowing rate, the blasting pressure is low, pumping loss is low, and the performances of the complete machine are excellent. The turbine pressurizing system is reasonable in design, is simple in structure and is suitable for the turbine pressurizing system without a valve control mechanism in an exhaust piping system.

Description

Technical field [0001] The invention relates to a turbocharging system in the field of internal combustion engines, in particular to a turbocharging system with adjustable compressor speed. Background technique [0002] With the development of society and the improvement of environmental protection requirements, the application of engine supercharging technology has become more and more extensive. Most of the medium and high-power engines use turbocharging technology to increase power and reduce fuel consumption. The two basic types of turbocharging systems are constant pressure charging system and pulse charging system. Constant pressure supercharging system. Each cylinder shares a large exhaust pipe. The structure of the exhaust pipe system is relatively simple. The pressure in the exhaust pipe remains basically constant. The pressure is only related to the load and speed of the engine. The number of cylinders is different. The supercharging system of the diesel engine can be ...

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Problems solved by technology

[0003] After searching the existing technical literature, it is found that Chinese patent number ZL200810203054.2, patent name: turbocharging system with variable supercharging mode when the turbo is placed in the middle, this patented technology provides a device with variable exhaust pipe volume , can better take into account the high and low speed conditions of the engine; but the controllable valve in the exhaust pipe is always in a high temperature environment, which is easy to cause damage to the valve, and it is also difficult to seal the valve in a high temperature environment

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