Main operating companies: Henan Fusheng air compressor maintenance, Henan Fusheng air compressor head overhaul, Henan Fusheng air compressor maintenance, Henan Fusheng air compressor machine overhaul Henan Fusheng air compressor maintenance service center 0371 -67,990,925 Technical Advisory: 13937181263 http://www.zzluosi.com http://www.hnlots.com screw air compressors host overhaul necessity Screw Compressors host, screw and screw , theoretically between the screw and host casing and the front and rear ends are not in contact with its reason three: 1) the host normal working hours constitute oil film between the screw and the screw does not directly touch is just starting, of course, the host or intermittent poor short hour of the film does not constitute or film, between the screw and the screw will have a positive direct touch; 2) screw with the host housing machining accuracy to ensure the host device between the screw and the host shell appropriate open space, the size of the open space is now considering to host high-temperature work when the screw and the shell deformation amount differences; 3) the screw and the front and rear end face of the open space is needed based on technical parameters during the screw device to ensure the open space the same size as now takes into account the amount of deformation of the screw and the front and rear end face there are differences in the host hot working problems, together with tightening screw radial load and the axial load by the host both ends of the locating bearing bears, the screw has no axial displacement, so the end face of the open space to be further guarantee. Followed by the passage of air compressor work hour, host bearings will inevitably wear and tear, and then cause the screw axial movement and radial movement increase occurs, the changes will make the screw and screw between the screw and the host shell and front and rear end the open space between the occurrence of the changes. Changes to the open space in the bearing life expectancy period is normal, permissible, while the the resulting air compressor gas production the attenuation and drive motor load increase is normal, permissible. However, when bearing wear and host collaborative open space beyond the allowable pole quantitative occurrence of serious outcomes. 1) between the the host internal screw and the front and rear end face, between the screw and the host housing in conflict, a sharp increase in the motor load, the most serious outcome is screw Hugging even host scrapped if the motor protection the insensitive reaction or failure can cause Motor burned. 2) greater attenuation of the air compressor gas production, can affect the normal gas units produced. Thus, it is necessary to overhaul the host, but is also necessary. Second, the host needs overhaul conclude precisely the the hosts overhaul moment should prevail to the life of the bearing maturity, but in fact very difficult to precise target to distinguish whether the service life of the bearing is about to expire or is now due, therefore, conclude that the specification of the world-renowned manufacturer of air compressor based on nearly a hundred years of practice experience in the operation of the compressor 20,000 hours or 4 years to overhaul the host. In addition to the above the prevailing norms, based on experience from several parties facing host more accurate discrimination: 1) the host running the sound, especially bearing any abnormal sound; 2) motor running current special is empty different load running current normative values; 3) nose bearing oscillation. Need to improve the detection tool, According to test results, and technical data control, can be useful to distinguish whether demand to overhaul the host. Third, the primary job of the host overhaul) apart, drawing pressure transmission gear (or pulley) and bearing; 2) removal of the screw, shaft, gap adjusting pads, grinding repair shaft, screw and stator damage the surface; 3) press-fit bearings, adjust the gap to quiz each gap; 4) commissioning run-in adjustment. Oil-free screw host, user should not be self-protection; the injector screw the host, usually should pay attention to the following local: 1) bearing there is a need for full set of replacement; 2) View the rotor surface, whether demand for marking; 3) intake and exhaust bearing view, whether the needs correcting; 4) host installation installation requirements, do not know can not open the host; 5) the usual intake side of the gap for 0.35-0.50mm; exhaust end of the gap for 0.08-0.15mm; promised range as far as possible as rework, the bigger company mainly engaged in: Henan Fusheng air compressor maintenance, Henan Fusheng air compressor head overhaul, Henan Fusheng air compressor maintenance, Henan complex Sheng air compressor machine overhaul Henan Fusheng air compressor maintenance service center 0371 -67,990,925 Technical Advisory: 13937181263 http://www.zzluosi.com http://www.hnlots.com