A
rotation control type pipeline reducing rate variable device belongs to the technical field of
mechanical design and comprises an
air compressor, an engine, an air
exhaust pipe, a
turbine, a volume cavity, a rotation body, a spring, a connection
pipe, a rotation rod, a rotation shaft and a rotation plate. The longitudinal sections of the volume cavity and the rotation body are both in arc shapes, the rotation plate is installed in the air
exhaust pipe, the rotation plate and the rotation shaft are fixed together, the
left wall of the rotation body is connected with the
left wall of the volume cavity through the spring, and two ends of the connection
pipe are respectively communicated with the right wall of the volume cavity and the air
exhaust pipe. When pressure in the air inlet
pipe of the engine is high, the rotation body drives the rotation plate to rotate in a counterclockwise mode, pumping loss of the engine is small, and the whole performance is excellent. When pressure in the air inlet pipe of the engine is low, the rotation body drives the rotation plate to rotate in a
clockwise mode, available energy in front of the
turbine is more, air
inlet pressure of the engine is high, and the whole performance is excellent. The
rotation control type pipeline reducing rate variable device is reasonable in design, simple in structure and suitable for a
turbine single inlet turbocharged
system.