Main operating companies: Fusheng air compressor maintenance, Zhengzhou, Zhengzhou Fusheng air compressor head overhaul Fusheng air compressor maintenance, Zhengzhou, Zhengzhou Fusheng air compressor machine overhaul Zhengzhou air compressor maintenance service centers: 0371-67990925 Technical Advisory: 13,937,181,263 http://www.zzluosi.com http://www.hnlots.com screw compressor hosts overhaul necessity Screw Compressors host work, screw the screw between theoretically between the screw and the host of the casing and the front and rear ends are not in contact, the reason there are three: 1) constituting the oil film in the host's normal work, so that between the screw and the screw does not directly touch, of course, in the host just starting or intermittently short hour because the film does not constitute or poor situation of the oil film between the screw and the screw will have a positive direct touch; 2) screw machining accuracy with the host housing guarantees screw with host housing between the host device appropriate open space, the size of the open space now take into account the differences of host high-temperature work when the screw and the shell deformation amount; 3) the screw and the front and rear end face of the open space is needed based on technical parameters during the screw device guarantees, like the size of the open space now available there are differences in the screw and the front and rear end face deformation amount when taking into account the host hot working, together with tightening screw radial load and 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 obtain further assurance . 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; as rework, as far as possible in the promised range bigger company mainly engaged in: Fusheng air compressor maintenance Zhengzhou, Zhengzhou Fusheng air compressor head overhaul Fusheng air compressor maintenance, Zhengzhou, Zhengzhou complex Sheng air compressor machine overhaul Zhengzhou air compressor maintenance service center 0371 -67,990,925 Technical Advisory: 13937181263 http://www.zzluosi.com http://www.hnlots.com