Structure Analysis of Semi-hermetic Screw Compressor for Screw Chiller

Screw chillers | Water cooled screw chillers | Air cooled screw chillers | Low temperature screw chillers - Structure analysis of semi-hermetic screw compressors for screw chillers: Screw refrigeration compressors are the soul of screw chillers Where, even small-capacity screw compressor models can obtain good performance, and have good regulation performance, stable operation, safety and reliability.

The following is an analysis of the structure of semi-hermetic screw compressors for screw chillers used in Shenzhen Yuejinjin Chiller. Its performance characteristics are as follows:
1. All the rolling bearings are used. The radial bearing adopts a cylindrical bearing, while the thrust bearing uses a ball thrust bearing to bear the axial thrust of the rotor. Due to the high precision of the rolling bearing and the small clearance, the rotor shaft center can be kept stable, which can reduce the meshing clearance between the rotor and the rotor and reduce the leakage loss.
2. The oil separator is integrated with the main engine. The inhaled gas first passes through the motor. After cooling the motor, it enters the cylinder and is discharged by the compressor. At the exhaust port, it is covered with a cylinder, and the oil filter is set in the cylinder. Because it is separated from the gas, there is no need to separately install an oil separator in the screw chiller refrigeration system. At the same time, the exhaust noise is reduced, and the entire unit assembly is compact.
3, differential pressure oil. The differential pressure oil supply uses the difference between the discharge pressure and the pressure at the bearing to supply oil. The oil pump is not provided, which simplifies the screw-type chiller lubrication supply system. Due to the use of rolling bearings, the oil present in the bearings can be used to lubricate during start-up. Therefore, the pressure difference can be used as a condition of oil supply.
4, no oil cooling system. Compressors use newly developed synthetic lubricants. Even at higher exhaust temperatures (eg 100°C), the oil maintains the viscosity required for chiller lubrication and sealing, eliminating the need for oil coolers and only the machine Shell heat can be.
5, gas transmission stepless adjustment. The use of a moving spool valve for stepless adjustment of the compressor gas transmission is obviously superior to the piston compressor's stepless cooling capacity adjustment, which satisfies the higher precision temperature regulation requirements.
6, spray cooling. For semi-hermetic screw compressors, when the exhaust gas temperature is high, the temperature of the lubricant oil rises too high, and the compressor motor is often easily burned. The method of spray liquid cooling may be used to perform cooling and cooling to ensure that the working condition falls on the compressor. Within the limits of work.

Semi-hermetic screw refrigeration compressor adopts new multi-stage energy regulation. The energy adjustment range of each compressor is: 25%, 50%, 75%, 100%. The specially designed smooth start method has small starting current, large starting torque, little influence on the power grid, and does not interfere with the normal operation of other equipment.

This article from the Shenzhen Yuejin Refrigeration starting, reproduced please note the original URL: http://