Yanmar 6LPA-STP2, Руководство по обслуживанию

Страница: 250 / 318

TURBOCHARGER
9-4 6LPA Service Manual
Turbocharger
© 2007 Yanmar Marine International
TURBOCHARGER
Components and Operation
Turbine
Exhaust gas coming out of the engine is
accelerated as it flows through the nozzle of the
turbine housing and blown against the turbine
wheel rotate the turbine shaft. This is called the
turbine, in which the seal rings and thermal
insulation plate are integrated to prevent failure of
the bearings from the heated exhaust gas.
Blower
The compressor impeller mounted on the turbine
shaft rotates with the turbine shaft in a separate
plenum to compress the intake air to be fed to the
air intake pipe and into the engine. This is called
the compressor or blower.
Thrust Bearing
Thrust force is continuously applied to the turbine
shaft. The thrust bearing is designed to prevent the
shaft from movement due to the thrust.
Radial Bearing
The radial bearing is a floating bearing type, as it
has double oil film layers on the inside and outside
surfaces of the bearing. This causes the bearing to
rotate together with the shaft. The slippage speed
of bearing is lower than the turbine shaft revolution,
thereby, the dynamic stability is improved, when
compared with the normal type bearing.
Sealing Structure at Blower Side
Dual-wall structure is adopted into the rear of the
compressor housing to prevent leakage of intake
air and oil. A seal ring and oil defensive plate are
also used to seal intake air and oil.