China turbocharger shaft Manufacturers,stainless steel shaft Suppliers

The driving force of the exhaust gas turbocharger is derived from the exhaust gas discharged from the engine. The exhaust gas turbine and the compressor impeller are mounted on the same shaft. When the exhaust gas flow hits the turbine, the turbine rotates at a high speed, and at the same time, the compressor impeller is rotated at the same speed, and the clean air filtered through the air filter is sucked into the compressor chamber. After the compression, the pressure rises, enters the charge air cooler through the pipeline to cool, and then enters the cylinder, thereby improving the inflation efficiency of the engine.

The engine control unit performs pulse width control on the boost pressure limiting solenoid valve according to the current engine speed and load requirement, so that part of the exhaust gas is discharged from the wastegate valve, and the amount of exhaust gas flowing through the turbine is adjusted, thereby effectively controlling the intake boost pressure. Adapt it to the engine operating conditions.

When the engine operating conditions change drastically or other factors cause the boost pressure to rise sharply, such as the sudden acceleration and then the throttle is suddenly thrown, the engine control unit controls the charge air recirculation solenoid valve to conduct the gas before and after the supercharger to maintain the pressure balance. . This control can effectively avoid gas noise and impeller damage when the throttle is closed, and at the same time keep the turbocharger at a high speed, so that the supercharger can provide the required supercharging to the engine more quickly when needed. Pressure, reducing the "hysteresis" of the turbocharger.

The turbocharger is accumulated in a high temperature environment for a long time, and the heat accumulation is more serious. After the engine stops working, its mechanical water pump stops working. At this time, in order to effectively protect the supercharger, additional supercharger cooling is required. Therefore, the exhaust gas turbocharging system generally has an electronic water pump delay closing function, that is, after the engine stops working, the electronic water pump continues to operate for a period of time (such as 8 min), thereby ensuring the heat dissipation of the supercharger and implementing protection.

The pump is a machine that transports fluid or pressurizes the fluid. It is mainly used to transport water, oil, pulp, acid and alkali, emulsion, suspoemulsion, gas mixture and liquid metal. It is a common transportation in the mining, chemical and metallurgical industries. Equipment, below for the preparation of 19 kinds of pumps (gear pump, centrifugal pump, screw pump, reciprocating pump, piston pump, hydraulic piston pump, mud pump, pneumatic diaphragm pump, axial flow pump, self-priming pump, vortex pump, The dynamic working principle and characteristics of water ring vacuum pump, Roots vacuum pump, rotary vane vacuum pump, gas booster pump, gas-liquid booster pump, steam jet pump, etc., in order to have certain support for the selection and use of pumps s help.

Working principle: the teeth of the two gears of the gear pump are separated from each other to form a low pressure, the liquid is sucked in, and sent to the other side along the wall of the casing. The other two gears are closed to each other to form a high pressure to discharge the liquid.

Advantages: simple and compact structure, small size, light weight, good processability, low price, strong self-suction, insensitive to oil pollution, large speed range, impact resistance load, convenient maintenance and reliable operation.

Disadvantages: radial force imbalance, large flow artery, high noise, low efficiency, poor interchangeability of parts, difficult to repair after wear, can not be used for variable pumps.