Henan Fusheng air compressor sales and service 13937181263 http://www.58kyj.com a, Screw Compressors host operation between the screw and the screw, screw with the host housing and between the front and rear end are not theoretically of the contact, the reason there are three: 1) constituting the film when the normal operation of the compressor host so that direct contact between the screw and the screw, of course, the host is just starting or suspension within a short time because the film is not yet constitute or poor film morphology between the screw and the screw will necessarily direct contact with the machining accuracy of the screw and host shell; 2) assure proper clearance between the screw and the host in the host assembly housing, the size of the gap once thinking to host the high-temperature operation, screw and housing deformation difference; 3) the screw and the front and rear end of the gap is based on the skill parameter requirements during screw assembly guarantee that the size of the gap is the same as ever thinking to host high-temperature operation, the screw and the front and rear end face deformation difference problems, further tightening the screw, the radial load and axial load bearings bear the ends of the positioning by the host, there is no axial displacement of the screw, thus further guarantee end clearance. Followed by air compressor Operation of the work goes on, the host bearing will attack to wear, and then lead to the screw axial movement and radial movement increases, the change will make the screw and screw between the screw and the host housing and front and rear end The gap between the onset of changes. The gap shift in the bearing life carved days is normal, promised, attenuation and add a drive motor load is normal, promised and the compressor gas production that occur as a result. What, then, bearing wear and host clearance beyond the agreed limit, will be able to attack the grim results. 1) between the screw and the front and rear end face of the air compressor inside the host, between the screw and the host shell friction, a sharp increase in the motor load, the most serious consequence is the screw locking or host scrapped, if the motor protection insensitive response or failure may result in the motor burned. 2) larger attenuation of air compressor gas production may affect the normal production of gas units. This air compressor host overhaul is necessary, but also necessary. Second, the host needs to be precise, the host should prevail due to the bearing life time of overhaul overhaul judgment, but in fact very difficult to have accurate indicator to determine whether the service life of the bearing is about to expire or has expired, internationally famous air compressor manufacturers nearly a hundred years of practical experience criteria established by the compressor is running 20,000 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 host conditions to make more accurate judgments: 1) the host running the sound, especially bearing any abnormal sound; 2) motor running current is empty set out to run the current standard value difference; 3) The head of each bearing vibration. Perfect testing tool, according to test results and technical data control, can effectively determine whether you need to host a major overhaul. Third, the primary task of the hosts overhaul 1) apart, drawing pressure response gear (or pulley drive installed) and bearing; 2) cleaning screw axis, gap adjusting pads, sanding, repair shaft, screw and stator damage the surface; 3) press-fit bearings, adjust the gap to test the gap; 4) commissioning, running adjustments. Oil-free screw host, the user should not be self-maintenance; injected screw host, the general should pay attention to the following local: 1) Bearing is required the entire change; 2) reflect on the rotor surface, if that needs correcting; 3) into the exhaust bearing reflect whether demand marking; 4) assembly requirements of the host assembly, do not know can not open the host; 5), the intake side of the gap is 0.3-0.5mm; exhaust side gap of 0.08-0.1mm; due to repair, should be as large as possible in the promised limitations Henan Fusheng air compressor sales and service 13937181263 http://www.58kyj.com