Laserfiche WebLink
r 'a <br /> Principle of operation, Machine versions <br /> ' Principle of operation Machine versions <br /> I <br /> i <br /> Rotary compressors irid ,r n.irr- ,,r ,and vacuum pumps are i he v:arwu5 versions of the machine L1dt.. gra 111<.+r rf►G•ihod of <br /> ' muilr-cell compressors whi0i % r,li our the displacement principle iul)rrcatron and cooling <br /> t They provide a constant IOW puh„urfirt supply <br /> • Oil lubricated machines are fed by in nrtonialic dosage <br /> The machines are single phase and have a cylindrical bored hou pump in the oil reservoir The rotor shalt d'ractly drives <br /> sing The rotor which is also cylindrical is fitted eccentrically in the the lubricating oil pump <br /> housing, so that a crescent shaped working chamber is formed <br /> Moveable rotor vanes are fitted in the longitudinal grooves in the • Dry compressors for the supply 01 t-ompressed air that <br /> rotor,centrifugal force and the loices of the gas cause them to slide is absolutely free of oil work completely without oil in <br /> along the side of the housing when the rotor turns the compression chamber The roller bearings of these <br /> machines have permanent lutrtication(permanent grea- <br /> The vanes divide the crescent shaped chamber into cells of diffe- se unit)or automatic lubricant input <br /> ring sizes When the rotor turns the cell volume on the intake side <br /> increases, and the resulting underpressure draws air into the cell, • In air-cooled machines two ventilators on the rotor shaft <br /> which at this point is open to the intake suction nozzle As the rotor feed in the coolant air supply axially via the housing <br /> continues to turn, the cell is closed and the volume of the cell ribbing <br /> decreases.The enclosed air is thus compressed,and it is pressed <br /> out on the pressure side by means of the pressure nozzle • Water-cooled machines have a water sleeve within the <br /> housing The coolant water circulates in a forced circu- <br /> On the basis of this operating principle, the machine works with lation system driven by a circulation pump. <br /> polytropic compression The compression ratio <br /> pOFF/pON that <br /> can be achieved is limited by the final compression temperature Type code <br /> R FL 60 D V R <br /> Rotary compressor/ <br /> compressor vacuum pump <br /> with fresh oil lubrication =RF <br /> Housing cooled by <br /> + Air cooling a L <br /> Water cooling e W <br /> Size of compressor <br /> t (or compressor vacuum pump, <br /> i Functional principle of a rotary compressor or a compressor and Additional designations <br /> vacuum pump - Pressure operation -D <br /> - Vacuum operation =V <br /> i - Clockwise operation -R <br /> In the RFL sertes,therefore,there are air-cooled and oil-lubricated <br /> machines which can be supplied as dedicated compressom as <br /> dedicated vacuum pumps or as combined compressors and vacu- <br /> um pumps. <br /> Because of these three application areas for the RFL machines. <br /> there are some differences in the instructions for installationk ope- <br /> ration and maintenance,so that not all points in certain chapters <br /> will apply to the entire series.To make it clear which text passages <br /> apply to which type, the following abbreviations are used in the <br /> relevant chapter headings <br /> -C Compressor <br /> -C-VP Compressor and vacuum PUMP <br /> .VP Vacuum pump <br /> l <br /> i l <br /> t <br />