Purpose
Supplying additional air to the engine cylinders using the energy of exhaust gases.
Control of boost pressure of a constant geometry turbocharger of a gas turbine.
The boost pressure is controlled depending on the readings of the boost pressure sensor according to the algorithm available in the control unit.
The vacuum converter, controlled by the control unit, supplies the control vacuum to the vacuum chamber (1) (see figure VN 2.109), which, by means of a rod, controls the position of the bypass valve (13).
When the bypass valve is open, the engine operates in natural suction mode. When the valve is closed, the entire volume of exhaust gases is directed to the turbine wheel (6), and the turbocharger operates at full power.
Boost pressure control in a variable geometry turbocharger of a gas turbine
Another, more advanced design of the turbocharger provides for regulation of the turbocharger rotation speed by changing the installation angle of the fixed blades (12) of the gas turbine guide apparatus. All rotary blades are connected by one ring (10), during rotation of which the blades rotate synchronously. On drawing VN 2.110 it is shown that when the angle of installation of the blades changes, the gaps (13) and (14) between them, through which the gas flow is supplied to the turbine wheel, change.
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The synchronizing ring is driven from the vacuum chamber (17) by means of a mechanical control rod (8).