| Home>Bearing knowledge>Protection and maintenance of common mechanical problems of electric motors |
Protection and maintenance of common mechanical problems of electric motors
| /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089'; |
1The bearing is excessively worn or poorly installed; the stator and rotor are rubbed; the outer surface of the iron core is damaged; and the short circuit between the silicon steel sheets is formed; the iron loss of the motor is added; the temperature rise of the motor is too high. At this time, fine smashing and the like are used to remove the burr; Eliminate short-circuiting of silicon steel sheets; apply insulation paint after finishing; and heat and dry.
2 Excessive force is removed when the old winding is removed; the stolen groove is tilted and opened outwards. At this moment, the needle-nosed pliers and the raft head are used for trimming; the tooth is reset; and the gap between the silicon steel sheets is not good. Hard insulating materials such as shell paper and rubber wood.
3 Due to moisture and other reasons, the iron core is rusted. At this moment, it needs to be sanded and cleaned; after finishing, it is coated with insulating varnish.
4 Surrounding group grounding occurs high heat incineration of iron core or tooth. The fuse can be removed by a chisel or scraper, etc.; coated with insulating paint to dry.
5 The connection between the iron core and the base is loose; the original set screw can be tightened. If the set screw fails; the positioning hole can be drilled and tapped on the base; tighten the set screw.
Second, the bearing fault repair shaft through the bearing support transformation; is the most heavy load; it is a simple wear parts.
1 fault view in operation,
When the rolling bearing is short of oil; you will hear the sound of “bone bonesâ€, if you hear the sound of “stalks†that are not connected; it may be that the bearing steel ring breaks. The bearings are mixed with sand and other debris or the bearing parts are mild. When worn out; subtle noise will occur.
After disassembling, view
First observe the bearing rolling body, the surface steel ring can be damaged, rust, scar, etc.; then hold the bearing inner ring by hand; and make the bearing flat; the other hand push the outer ring; if the bearing is outstanding; The steel ring should be stable; there is no oscillation and significant stagnation in the transition; after the rotation, the outer steel ring has no receding appearance. Otherwise, the bearing can no longer be used. The left hand is stuck in the outer ring; the right hand pinches the inner steel ring; Forcefully push in all directions; if it is propelled, it feels very loose; it is severely worn.
2 The rust spots on the outer surface of the repaired bearing can be erased with No. 00 sandpaper; then it is removed in gasoline, or the bearing has cracks, the inner ring is broken or the bearing is excessively worn; the new bearing should be replaced. When replacing the new bearing; Use the same type of bearing as the original.
Third, the shaft fault repair 1 axis twists and turns,
If the tortuosity is not large; it can be corrected by polishing the journal and slip ring. If the tortuosity exceeds 0. 2mm; the rotating shaft can be placed under the press; the pressure is corrected at the bending and bending; the corrected shaft external lathe is used. Cutting and polishing, if the twist is too large, you need to change the new shaft.
2 journal wear,
When the journal wear is not large; a layer of chrome can be plated on the journal; when it is ground to the required scale, when there is more wear; it can be surfacing on the journal; then it can be cut and polished on the lathe, if the journal wears Large time; also turning 2-3mm on the journal; re-car a sleeve; hot on the journal; then turning to the required scale.
3-axis crack or crack,
The transverse crack depth of the shaft does not exceed 10%-15% of the shaft diameter, and the longitudinal crack does not exceed 10% of the shaft length; it can be compensated by surfacing method; then the car is refined to the required scale. If the crack of the shaft is severe; Need to replace the new shaft.
4. If the casing and end cover of the casing and end cover have cracks, they should be repaired by surfacing.
If the bearing bore is too large; the bearing end cover is too loose; usually the punch can be used to punch the bearing hole wall evenly; then the bearing is driven into the end cap. For the higher power motor; The method of filling or plating; the final processing of the required dimensions of the bearing.
Recommend to friends comments close window
| Bearing related knowledge |
| The main factors affecting bearing oscillations are smoothed by SKF bearing heating problems. Analysis of the causes of corrosion of the painful bearing and the prevention and control methods. Rolling bearing rings are not qualified for the rescue method. Continuous casting machine guide roller lifting end, positioning end bearing solution plan |
This article links to http://
Please indicate the bearing network http://
Previous: Analysis of the use of CJ composite bearing bushings Next: Inserting roller bearings or replacing YRT rotary table bearings
Fiberglass Duct Rodder are composed of fiber glass rod which was extruded by fiber glass and high strength resin at high temperature. This type of rod has high tensile strength and flexibility. It was covered by a high density polyethylene engineering plastic as its protect layer(High Density polyethylene (Grade: for the insulating and jacketing of Telecommunication Cables) is used in the outer diameter coating.), which make duct rodder cover sliding on surface, durable, corrosion resistant and has good insulation performance, which make them safe for use in cable occupied duct.
And moving type fiberglass duct rodder will equipped with different size reel according to the length of rod. There are wheels on the reel, which make it convenient for moving.
Features and Benefits:
1-Light weight, durable, resistance to acid, alkali, aging resistant, corrosion resistant.
2-High tensile strength and bending properties, which make it to go through narrow pipes easily.
3-Good temperature adaptability, the product will not soften in hot weather/nor become brittle in cold weather. Its usability will not be affected by temperature.
4-Outer protect layer are made of high density polyethylene engineering plastic, which has good anti-UV capability.
5-Cover was coated with long-term UV-resistant polyethylene.
6-Its surface has the advantage of smooth, wear-resistant and long service life.
7-There are meter marks on the protect layer of duct rodder, which can be used for measuring distance. Marks are printed by professional printing machine, which has the advantage of strong adhesion, clear writing, waterproof, anti-ultraviolet, it can be still clear even after using many times.
8-There are several kinds of colors for the rod for your chosen.
Fiberglass Rodder,Fiberglass Duct Rodder,Fiberglass Conduit Rodder,Duct Push Rod,Fiberglass Duct Rod,Conduit Rod
NINGBO MARSHINE POWER TECHNOLOGY CO., LTD. , https://www.marshine-power.com