Compressor capacity contrlling ! VVCP скачать в хорошем качестве

Compressor capacity contrlling ! VVCP

A VVCP is used to change the clearance volume of the head end of a cylinder. The amount of clearance will vary depending upon the position of the clearance pocket piston. Clearance is added to the cylinder by turning the piston assembly counter clockwise (CCW). Most compressor cylinders can be equipped with variable volume clearance pockets. The VVCP is mounted in place of the head end cylinder head. The VVCP includes an adapter, piston, seal ring, stem, Teflon V packing, turning handle and locking wheel. To set the VVCP at the desired percentage open, fully close the VVCP, and then fully open it, counting the number of turns to the full open position. Fully close the VVCP. Multiply the number of turns by the desired percentage open, and turn the VVCP open the resulting number of turns. Effect on compressor when clearance is added. 1. As a result, the VE of the cylinder is reduced. 2. As a result, the Suction Pressure increases. 3. As a result, the compression ratio decreases. 4. As a result volumetric efficiency decrease. 5. As a result engine load decrease. Effect on compressor when clearance is reduced. 1. As a result, the VE of the cylinder is Increase. 2. As a result, the Suction Pressure decrease. 3. As a result, the compression ratio increase. 4. As a result volumetric efficiency increase. 5. As a result engine load increase.