Centrifugal Chiller Compressor

The gearbox has two transmissionin the drive, the more gears, and the driven gear, which is the smallest gear and that turns the fastest. Separate engine and lubricates the oil pump centrifugal compressors. This is usually 1/4-HP engine, situated inside the oil in the crankcase. Cm. Fig. 24-76. The three-phase motor, the device allows to pump oil to the compressor and gear rotation. It also allows the oil pump to run during coast-down at the end of the cycle. Lubrication system is a closed system. The oil is mixed with the refrigerant. Insulation is in the sump. Heater helps to avoid the migration of the refrigerant, when the system is turned off. However, some liquid will move into a sump causes foaming within a few minutes after launch, the compressor must be running on the reduction of the load until foaming of the oil decreases.

During operation of the oil is heated as it passes through the lubrication system components. Oil absorbs heat from the bearing. Oil in the crankcase is 140F (60C) 160F (70C). Oil radiator, preventing overheating oil in the process of exploitation. Oil is cooled to about 120F (49C).

The power is regulated through the guide vanes, in the centre of the wheel and eyes. Vanes often called prerotation guide vanes. They serve two purposes: to provide the full or reduced flow, and help the refrigerant entering the impeller eye, placing the refrigerant in the rotation pattern of rotation of the impeller. Pneumatic or electronic engine control vanes. When the vanes are closed, compressor, pumps 1.5%-20% of nominal capacity. When fans open and she pumps at 100% power. Engine speed is critical centrifugal compressor chiller. If the engine does not start in the wrong direction, it may damage the device. These motors produce a lot of heat which must be exhausted from the equipment of the room.

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