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Roots blower rotor friction collision between maintenance techniques

Release date:2015-12-18 00:00 Source:http://www.zqlcfj.com Views:

  Don't rush to remove, the first response to fan inspected every aspect. Touch machine before and after each bearing shell and the shell temperature is normal, turn the coupling with the hands or tools for turning, check whether the fan rotation is flexible.

  The cause of friction and collision between two rotors are: (1) gear slotting key cooperate and loose; (2) the gear shaft end fastening nut loose or gasket failure; (3) gear wheel hub hole and shaft with bad; (4) and bearing clearance in excess of the prescribed technical requirements; (5) the gear backlash is too large; 6 key rotor is loose.

  Practice has proved that loose on the drive shaft gear slotting cooperate with key is the key cause of the collision between two rotor. Further analysis shows, the registry keys face (two side) and the shaft and the wheel hub keyway two side close contact, the two contact surfaces is interference fit, the rotor torque is passed by the two cooperate with the surface. Due to large fan when starting this button force, plus long one-way operation phase stress, the wear and tear keys or keyways, make the two transmission gear with Angle deviation occur, causing rotor assembly clearance changes and trigger a collision.

  At this time, remove the gear box shell, hexagon fastening nut hammer percussion gear end, observe whether is loose, check whether the gasket failure. And then, use the impact method to check on the drive shaft gear wheel with key whether is loose. This method is with a hardwood on the minimum clearance between the rotor and turn the coupling with the hands or tools, make the two rotor and hardwood. The impact, the gear and shaft with or without relative motion. After a crash, reoccupy feeler reiteration clearance here. If any relative motion hit gear and shaft, two rotor clearance changes after the collision, can determine the driving gear wheel with key is loose. In this way, with a new key can be out of the collision between the two rotor phenomenon.

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