IMPROVED PART LOAD PERFORMANCE OF VARIABLE SPEED SCREW COMPRESSOR

• Main Author: SISHTLA VISHNU M
• Format: Patent
• Language: English; Korean
• Published: 12.07.2001
• Edition: 7
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MACHINES OR ENGINES IN GENERAL; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; STEAM ENGINES; WEAPONS

PURPOSE: An improved part load performance of variable speed screw compressor is provided to increase volumetric efficiency at low speeds by increasing oil flow to the rotors at low speeds. CONSTITUTION: A hermetically sealed refrigerating device(10) extracts an oil rich layer formed in an upper layer of a cooler(22) from the cooler to lubricate and seal rotors(12-1,12-2) to supply to an ejector(50) having the size suitable for supplying a maximum quantity of required lubricant via a line(40). A line(52-1) has a limiter(60) adjusted to the size to supply a proper flow of lubricant to the rotors. A line(52-2) has a normally closed solenoid valve(62). When a speed of a motor(26) becomes sufficiently slow, the solenoid valve is opened by a control device(34) to supply a larger quantity of oil to lubricate and seal the rotors. 가변 속도 스크류 압축기의 회전자에 대한 윤활 제공은 전부하에 최적화되어 있으며, 저속 작동 중에 개방되는 보충 공급 통로가 제공된다.