How Does The Turbocharger of The Diesel Generator Set Work?

The so-called turbocharging is a technology that compresses air before it is supplied to the cylinder to increase air density and intake volume. The turbocharger is the component that implements the technology of boosting. The purpose of a turbocharger is to increase inflation, increase power, improve economy, improve emissions, and improve high-altitude performance. Simply put, it is the use of exhaust gas turbochargers to increase the inflation density, greatly improving the unit mass power ratio of diesel generator sets, and thus widely used in diesel engines.

Exhaust gas turbocharger is a turbocharger that uses the energy of exhaust gas emitted by the engine as a power source to drive. It is actually an air compressor that increases the intake volume by compressing air. It uses the inertia impulse of exhaust gas emitted by the engine to drive the turbine inside the turbine chamber, which in turn drives a coaxial impeller. The impeller is pressurized by air to enter the cylinder. When the speed of the diesel generator set increases, the exhaust gas discharge speed and turbine speed also increase synchronously. The impeller compresses more air into the cylinder, and the pressure and density of the air increase, which can burn more fuel and increase the output power of the engine.

Now let's explore the structure and working principle of the turbocharger for diesel generator sets together

1. The structure of the turbocharger for diesel generator sets.

The turbocharger of a diesel generator set mainly consists of two parts: a compressor and a turbine.

The compressor section mainly includes components such as single-stage centrifugal compressor impeller, diffuser, turbine casing, sealing device, etc.

The turbine section mainly includes components such as vortex shells, single stage radial turbine impellers, and turbine shafts.

The turbine shaft and turbine are welded together by friction welding. The compressor impeller is installed on the turbine shaft with clearance fit and tightened with nuts.

After the turbine and turbine shaft assembly are combined with the compressor impeller, they must undergo precise dynamic balance tests to ensure normal operation under high-speed rotation.

The rotor support of the turbocharger adopts an internal support form, and the fully floating floating bearing is located in the middle body between the two impellers. The axial thrust of the rotor is supported by the end face of the thrust ring.

Both the turbine end and the compressor end are equipped with sealing ring devices, and the compressor end also has an oil baffle ring to prevent oil leakage.

The compressor casing, turbine casing, and intermediate are the main fixing components, and the turbine casing and intermediate, as well as the compressor casing and intermediate, are all connected by bolts and pressure plates; The compressor casing can be installed at any angle around the axis.

The lubrication of the turbocharger adopts pressure lubrication, and the lubricating oil comes from the main oil passage of the diesel engine, and then flows back to the diesel oil pan through the return pipe.

2. The working principle of the turbocharger for diesel generator sets.

The exhaust gas discharged from the diesel generator set enters the nozzle through the turbine inlet, converting the thermal and static pressure energy of the exhaust gas into kinetic energy. It flows through the turbine blades in a certain direction, driving them to rotate at high speed and generating a siphon effect on the coaxial compressor impeller. After passing through the air filter, fresh air is sucked into the compressor, and through the diffuser, the speed and density of the airflow increase, the pressure increases, and then enters the intake pipe of the diesel generator set to achieve an increase in cylinder inflation, which can then inject more fuel to improve the power of the diesel generator set.

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