M200-250 Detail Specification Ingersoll Rand
INLET AIR FILTER
Inlet air filtration for the M200-250 is accomplished by a large 99,9% efficient at 3 micron and above, dry type air filter. This is more than suitable for the vast majority of applications: However, where high dust and dirt contamination in the ambient air is present.
The air end is the fundamental component in any rotary screw compressor package. Reliability, performance and efficiency are determined by design, maintaining close manufacturing tolerances and precise assembly of the air end itself.
The function of a coolant injected screw compressor air end is very simple. In principle it is a positive displacement compressor and the mechanics of compression are the same as reciprocating, sliding vane or lobe type compressors. The outside ambient air is drawn through an inlet air filter into the compression module. By rotating male and female rotor, the male rotor starts to mesh at the inlet end with the female rotor. The male lobs squeeze the trapped air towards the discharge port, which causes the pressure to rise. A steady injection of coolant during the compression through pressure nozzles lubricates the rotors, adsorbs the heat of compression and provides for rotor sealing.
The rotors are manufactured from AISI-C-1141 forged steel. After the machining process has been completed, each rotor is inspected on three axes for dimensional integrity. The rotor housings are made of close grain high quality cast iron. Each housing is dimensionally checked to ensure accuracy.
The bearing configuration used on M200-250 models is time proven SSR tapered roller bearing design.The tapered roller bearing essentially consists of constructing the roller elements, as well as the raceways, so that lines drawn coincident with the working surfaces of the rollers and races will all meet at a common point on the axis of the bearing. This allows the bearing to handle all loads, radial, thrust or both. With this bearing configuration, the discharge end of the male and female rotors are each equipped with a pair of tapered roller bearings offset at opposing axis for maximum absorption of thrust and radial loads. High quality cylindrical roller bearings are used to carry the radial loads on the inlet end of the rotors. All bearings, whether thrust or radial, are high quality vacuum degassed bearings, which provide a harder running surface for both inner and outer bearing races.
Coolant dams are machined at each bearing location. The coolant dam provides an area for coolant to collect or pond when the compressor is shut off. Upon start up the roller bearing which is resting in coolant in the coolant dam begins to rotate and is immediately lubricated. This unique design improves bearing and air end life time. (Airends without coolant dams may
operate dry for many seconds on start up.)
MAIN DRIVE MOTOR-GENERAL
The main drive motor has been carefully selected to meet precisely the requirements of air compressor applications. Torque and load requirements of the compressor were matched to specific design criteria that enabled the compressor motor to develop peak efficiency and power factor at full load.
Standard units are supplied with IP23 rated motor, insulation class F, in a 46 º C ambient.
Motor frame and end brackets are of cast iron or aluminium with integrally cast feet. This provides maximum strength and rigidity for bearing support, uniform stator/rotor gap and flanged permanent
alignment of all mating parts.
Speed, torque and operating characteristics have been designed to match the load of the compressor. Motor efficiency and power factor have been optimised to cover the entire capacity range of the SSR compressors. Standard motors are wound for 400V/3ph/50Hz to cover the most common voltages. (other voltages are available upon request).
Vacuum degassed ball bearings for the non drive end and roller bearings for the drive end provide dependable and reliable service. The motor shaft has the largest possible standard diameter. This means that larger bearings are fitted. These oversized bearings have an average applied life , which is approximately eight times greater than a standard bearing life. Both bearings are grease lubricated with bearing housings having inlet and relief fittings to simplify the lubrication procedures.
The motor is rated for 46°C ambient with a max. temperature rise of 89°C at full load (1.15) in a 46°C ambient. All windings and leads are copper with triple coats of insulating varnish to add extra margins of protection to the driver.
The main motor is equipped with flying leads, directly wired into the starter box. This eliminates the need of a terminal box on the main motor.
设计转速，扭矩及运行参数均满足压缩机的载荷要求。电机效率和功率系数已达最佳程度，能满足SSR所有系列空气压缩机的气量要求。标准电机为400v/3相/50 Hz, 以适合于最为普遍的电压要求(有其他电压选项)。
电机的使用环境温度在46C， 负载(1.15)条件下，最大温升为89 C。所有线圈和导线都是在铜线外凃加三层绝缘漆，以最大程度保护驱动系统。