This turbocharger is specifically designed to be compatible with the engines of Doosan DX520, DX520LC - 9C, and DX520 - 9 excavators. It is engineered to fit precisely into the engine's exhaust and intake systems to provide efficient forced - induction.
2. Type and Configuration
Type: It is a typical exhaust - gas - driven turbocharger. The exhaust gases from the engine pass through a turbine wheel, which drives a compressor wheel on the same shaft.
Configuration: The turbocharger consists of a turbine housing, a compressor housing, and a rotating assembly (shaft with turbine and compressor wheels). The turbine housing is designed to handle the high - temperature and high - velocity exhaust gases. It has an inlet and an outlet for the exhaust flow. The compressor housing has an inlet for ambient air and an outlet that delivers the compressed air to the engine's intake manifold.
3. Turbine and Compressor Sizes
Turbine Wheel: The diameter of the turbine wheel can vary depending on the specific design, but it's typically in the range of 80 - 120 mm. The size is determined based on the engine's exhaust gas flow rate and power requirements. A larger turbine wheel can handle more exhaust gas volume and extract more energy to drive the compressor.
Compressor Wheel: The compressor wheel diameter usually ranges from 100 - 140 mm. The compressor's size is designed to match the engine's air - intake needs. It compresses the incoming air to a higher density before it enters the engine, increasing the amount of oxygen available for combustion and thus enhancing engine power.
4. Boost Pressure
The turbocharger is capable of providing a specific boost pressure range. For these Doosan excavator engines, the boost pressure can typically range from 1.5 - 3.0 bar (0.15 - 0.3 MPa). The boost pressure is a crucial factor in improving the engine's power output and efficiency. It allows more air to be forced into the engine cylinders, enabling a larger amount of fuel to be burned efficiently.
5. Maximum Rotational Speed
The turbocharger's rotating assembly can reach a maximum rotational speed. This speed can be as high as 100,000 - 150,000 revolutions per minute (rpm). The high - speed rotation is necessary to achieve efficient compression of air and utilization of exhaust - gas energy. However, proper lubrication and cooling systems are in place to ensure the turbocharger can operate at such high speeds without overheating or premature wear.
