Double-turbine coaxially-connected device

Abstract

The invention relates to a double-turbine coaxially-connected device which belongs to the technical field of internal-combustion engines. The double-turbine coaxially-connected device comprises air compressors, an air inlet pipe, an engine, an air exhaust pipe, turbines, a volume cavity, a connecting pipe, a movable body, a spring and through tubes, wherein the movable body is arranged in the volume cavity and is hermetically contact with the inner wall surface of the volume cavity; the first through tube and the second through tube both penetrate through the upper wall surface and the lower wall surface of the movable body; and the right wall surface of the movable body is connected with the right wall surface of the volume cavity through the spring. When the engine is under a high-speed working condition, the movable body moves towards right, the first air compressor, the second air compressor, the first turbine and the second turbine work simultaneously, and the engine is lower in pumping loss, so that the engine is better in overall machine performance; when the engine is under a low-speed working condition, the movable body moves towards left, only the first air compressor and the first turbine work, pulse energy is sufficiently utilized, and the engine is higher in inlet pressure, so that the engine is better in overall machine performance. The double-turbine coaxially-connected device is reasonable in design, simple in structure and suitable for a turbocharging system with double turbines and double air compressors.

Description

technical field [0001] The invention relates to a turbocharger system in the field of internal combustion engines, in particular to a twin-turbine coaxial connection device. Background technique [0002] With the development of society and the improvement of environmental protection requirements, the application of engine supercharging technology is becoming more and more extensive. Most of the engines with medium and high power adopt turbocharging technology to improve power and reduce fuel consumption. The two basic types of turbocharging systems are constant pressure supercharging system and pulse supercharging system. Constant-pressure supercharging system, each cylinder shares a large-volume exhaust pipe, the structure of the exhaust pipe system is relatively simple, the equivalent flow area of ​​the turbine is relatively large, the pressure in the exhaust pipe is basically kept constant, and the pressure is only related to the load of the engine It is related to the r...

AI Technical Summary

Problems solved by technology

[0003] After searching the existing technical literature, it is found that Chinese patent number ZL200820226936.6, patent name: a compressor parallel supercharging device for a turbocharger, this patent technology provides a device with a variable compressor shell, It can better take into account the high and low speed conditions of the engine; but the change of its housing requires a special control mechanism, which makes the structure of the booster system more complicated

Images