Henan Fusheng air compressor sales and service 13937181263 http://www.58kyj.com, Screw Compressors host running when, screw, screw, screw with the host between the casing and the front and rear ends of theoretically are not contact, the reason there are three: 1) Compressor host normal operation constituting the oil film between the screw and the screw does not directly contact, of course, just in the host to start or abort a short efforts yet constitute a film or film morphology is poor between the screw and the screw will have the direct contact of the inevitable; 2) the processing accuracy of the screw and the host housing assure a proper clearance between the screw with the host in the host after the assembly housing, the gap size once taking into host high temperature operation screw and the amount of deformation of the housing there is a difference; 3) the screw and the front and rear end face of the gap is based on the technical parameters guarantee requirements during the screw assembly, the gap size the same once thinking to host high temperature operation, the screw and the front and rear end face deformation amount difference problems, further tightening screw radial load and axial load by the host two locating bearing bear, the screw has no axial displacement, and thus the end clearance for further assure. Followed by the passage of air compressor operation done, the host bearings will attack the wear, and then incurred screw axial movement and radial movement increase occurs, the transition will make between the screw and screw, screw with host housing and front and rear end a change in the gap between the onset. The gap into in bearing life carved days is normal, the promise of attenuation resulting air compressor gas production is normal and drive motor load add promised. What, then, bearing wear and a host of common gap beyond agreed limits of the amount, will be able to attack the grim results. 1) between the the air compressor the host internal screw with the front and rear end face, between the screw and the host housing friction, a sharp increase in the motor load, the most serious consequence is screw Hugging even host scrapped, if the motor protection the insensitive reaction or failure may cause the motor burned. 2) greater attenuation of the air compressor gas production, may affect the normal production of gas units. It may prove necessary to overhaul the air compressor host, but also necessary. Second, the host needs to determine precisely overhaul, the host should prevail to the life of the bearing maturity, but in fact very difficult to have an accurate indicator to determine the service life of the bearings is about to expire or have the time to overhaul maturity, therefore international standards identified by the name of air compressor manufacturers based on the practical experience of nearly a hundred years in the compressor run twenty thousand hours or four years after the host for a major overhaul. In addition to the above accepted standards, based on experience from the following aspects of the host state to make more accurate judgments: 1) when the host is running sound, especially bearing any abnormal sound; 2) motor running current special is empty set out to run the current standard value difference; 3) the nose each bearing vibration. Perfect detection tool, can, according to test results and technical information control can effectively determine whether the need to overhaul the host. Third, the primary task of the hosts overhaul) apart, drawing pressure response gear (or pulley drive installed) and bearing; 2) Clean the screw, shaft, and gap adjustment shims, grinding, repair shaft, screw and stator damage the surface; 3) press-fit bearings, adjust gap, testing each gap; 4) commissioning run-in adjustment. Oil-free screw host, the user should not own maintenance; injected screw host, should pay attention to the following local: 1) bearings are essential package of Change; 2) to reflect on the rotor surface, whether demand for marking; 3) into the , the reflections of the exhaust bearing seat, the ability to demand marking; 4) host assembly requirements of the assembly, not know is less than her inability to open the host; 5), the intake end of the gap is 0.3-0.5mm; exhaust side clearance of 0.08-0.1mm; promised limitations as far as possible as rework, bigger Henan Fusheng air compressor sales and service 13937181263 http://www.58kyj.com