The roller bearing seat is an important part of the roller and the nerve for the normal operation of the roller. Roller bearing housings, in addition to producing electric rollers, trough rollers and other roller products. The roller is one of the main components of the belt conveyor, accounting for 30%-40% of the weight of the whole machine. Determining the distance between the rollers can not only determine the stable operation of the belt conveyor, but also play an important role in reducing the maintenance workload of the belt conveyor, reducing energy consumption and increasing the service life of the conveyor belt. The roller is composed of a variety of accessories, mainly including the bearing seat of the roller stamping, the roller bearing, the roller seal, the roller bracket, the spacer sleeve, the hook joint, the cast steel rake, the cylindrical pin, the roller shaft and the circlip. Retaining ring etc. The roller bearings are mainly used on the conveyor rollers. The rollers are the accessories of the conveyor. The main consumption of the conveyor is the mine transportation and the steel plant transportation. The top rollers used in many other conveying machinery, where the rollers are used, of course, the roller bearings must be used. The coordination with the various parts is also very important. The coordination between the roller and the various parts of the bearing:
1. Tube body.
The manufacturing quality of the tube body is an important factor affecting the quality of the roller. Its out-of-roundness and different axis degrees of processing will directly affect the radial runout and rotation resistance of the roller, and later affect the service life of the roller. . The roller body of the idler will inevitably have the corresponding ellipticity, eccentricity and uneven wall thickness. The large dynamic unbalance force generated by the high-speed rotating idler will greatly shorten the bearing life and cause the idler. Damage, causing the conveyor belt to vibrate up and down perpendicular to the direction of movement. The greater the speed, the greater the vibration of the conveyor belt, and the greater the impact force on the roller, which further aggravates the damage of the bearing. Therefore, in order to improve the quality of the rollers and prolong the service life of the rollers, high-frequency welded pipes with good quality ratios are selected, and the steel pipe automatic cutting machine and the steel pipe double-head automatic lathe machine are used. The hole stop determines the size and accuracy requirements of the tube body, and avoids the quality problems caused by the misalignment of the tube stop of the roller.
2. Roller shaft
The roller shafts currently mainly include optical shafts, stepped shafts and hollow shafts. Because of the simple process of pulling the optical axis. The manufacturing cost is not high, so it is more and more inclined to choose the optical axis in production. No mandrel is the development direction of the new idler. The advantages of the new idler without mandrel are: light weight, simple structure, simplified manufacturing process, low running resistance coefficient, and the service life of the idler is increased by more than 2 times. The selection of roller shaft material mainly involves cast iron, carbon steel, rubber, very high polymer, etc. Among them, cast iron has become obsolete. At present, most carbon steels are heat treated to meet the rigidity requirements. Although the high polymer material roller is still in the growth stage and currently has a small market share, its performance is particularly outstanding: good precision, low resistance, light weight, and high degree of strength. Especially the outstanding features of preventing corrosion, not easy to corrode, flame retardant, preventing static electricity, collision without sparks, and avoiding gas explosion, can be called idler for underground coal mine.