Oil-free helical lobe compressor rotor anti-seizing protection method and device
A technology for compressor rotors and protection devices, applied in mechanical equipment, machines/engines, rotary piston pumps, etc., can solve problems such as rotor seizure, damage, sudden drop in oil pressure in the compressor lubrication system, and achieve zero return flow. , the effect of small torque
Active Publication Date: 2008-09-24
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
This kind of rubber tube is easy to age and damage due to long-term contact with oil, so the tube burst often occurs during the operation of the compressor, causing the oil pressure of the compressor lubrication system to drop suddenly and forced to stop
[0019] In addition, high-speed rotating parts will also cause rotor seizure failure due to lack of lubrication
Method used
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Embodiment
[0047] The oil screw compressor rotor anti-seizure protection device of the present invention is mainly composed of an air valve type check valve, an automatic steam trap before the valve, an automatic bypass steam trap before the valve, an automatic steam trap behind the valve, a manual bypass steam trap behind the valve and Globe valve and other components. It works by utilizing the difference in height and height between the air pressures that exist before and after the check valve. That is to say, when the air pump is in unloading or hot standby, the air on the high pressure side, that is, the system pressure, acts on the valve plate of the check valve. Since the valve plate is loaded with a spring force opposite to the flow direction, it is ensured that the valve plate is closed before the backflow occurs. Good zero backflow action.
[0048] The rotor anti-seize protection device of the oil screw compressor of the present invention is installed on the horizontal air pipe...
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The invention relates to an anti-scuffing protection method for the rotor of an oil-free screw compressor. The compressed air with water which is discharged from the air discharging port of a compressor main engine enters a back end user through an air-valve type check valve. A small part of the compressed air with water passes through a water drain valve which is connected in front of the air-valve type check valve to eliminate part of water in air in advance and then passes through a water drain valve which is connected in back of the air-valve type check valve to eliminate the other part of water in the air. Thus, water-carrying amount of the compressed air is lowered. And a valve plate is closed before the happening of reflux to achieve the zero reflux. The starting torque of the air compressor is ensured to be the minimum. Simultaneously, the scaling and the corrosion of moist air in pipelines on the surface of an air end rotor at the second section, the end face of a cavity body and the inner surface of the cavity body are avoided. Therefore, the condition of the rotor scuffing of the compressor at the online switching operation or at the starting stage as a standby machine is prevented.
Description
technical field [0001] The invention relates to the field of air compressors, in particular, the invention relates to a method and device for protecting the rotor of an oil-free screw compressor against seizure. Background technique [0002] Oil-free screw compressors are the mainstream products of air compressors in the world at present. However, according to investigations, the rotors of oil-free screw compressors currently used at home and abroad are prone to rotor seizure failures. Especially in the high-pressure section, that is, the second-stage air end has a higher probability of seizure failure. On the other hand, due to the very high technical requirements for rotor disassembly, repair, and installation, once a rotor seizure occurs, ordinary compressor manufacturers are unable to repair the air end of the oil-free compressor and have to replace it. As a result, the use and maintenance efficiency of the oil-free screw compressor is low, the service life is short, a...
Claims
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IPC IPC(8): F04C18/16F04C28/00
Inventor 陈旭光
Owner BAOSHAN IRON & STEEL CO LTD