Shandong Xinkaite Bearing Co.,Ltd.
Unified Social Credit Code: 9137 1525MA3C 5428XP
Production Department
Address: Xu Village Industrial Garden, Gan Town, Guan County, Shandong
Tel: +86 635 5638235
Fax: +86 635 5638808
Mobile: +86 15563545668
Service Hotline: 4000 305204 Sales Department
Address: 314 Puli Mansion, Beixiaoxinzhuang West Street, Jinan City, Shandong
Tel: +86 15688862750
Fax: +86 531 87901699
WhatsApp: +86 15688862750
Skype: live:XinKaite
Email: xkte@xinkaite.com
Conveyor roller use of instructions and technical standards
Clicks:2240 Date:12-5
Conveyor roller description
1. Conveyor roller features:
(1) the friction coefficient is small and stable, and it is easy to start. Generally, ball bearing f=0.001-0.002, roller bearing f=0.001-0.003, needle roller f=0.002, thrust ball bearing f=0.003, thrust roller bearing f=0.004.
(2) small axial size.
(3) the radial clearance is small and can be pretensioning.
(4) easy to lubricate and easy to maintain.
(5) some bearings can bear both circumferential and radial forces at the same time, and the structure is simple.
(6) shortcomings: poor impact capacity, large radial size, high speed, noise, short life.
2. Conveyor roller structure and material: it is a standard part composed of inner, outer ring, rolling body and cage. The material of the ring and rolling body is mainly high strength, high hardness and high carbon steel of chromium manganese, such as GCr15, GCr15SiMn, etc. The ball is also useful for high speed bearings. The cage is stamped with a soft steel plate or with a copper, aluminum, zinc alloy or plastic.
The failure form of 3. Conveyor roller is mainly the fatigue pitting caused by contact stress. The life calculation of the bearing is carried out according to the fatigue pitting failure. For bearings with open or tight seal, wear and tear often occur. In the case of impact load or low speed, the bearing may appear plastic deformation failure.
The classification and selection of 4. Conveyor roller are mainly the nine categories of the upper table. The angular contact bearings and deep groove ball bearings can bear radial force and circumferential force, widely used. Self-aligning bearings can withstand a circumferential force. Circular roller and needle roller bearing does not bear the circumferential force, thrust bearing does not bear radial force. Generally, roller bearing has large load capacity and is suitable for occasions with low speed, heavy load and impact. The allowable speed of ball bearing is high, and it is applied to high speed and light load occasions. When aligning the bearing is large or the deformation of shaft is large, the aligning bearing should be used.
5. Conveyor roller precision: the precision of Conveyor roller is divided into B, C, D, E, G five. G is the general level and is the most widely used. The B level is the highest and the price is the most expensive.
6. Conveyor rollers code name: the code name is made up of English letters and numbers. For example, bearing D23024C indicates: D - D level accuracy (the earliest letter G can be omitted), 24 - inner diameter d=24*5=120mm, 0 - diameter and width series, 23 - bearing type (angular contact ball bearing).
Technical standards and precautions of Conveyor roller
1. The combination of bearing and shaft is made of base hole, and the combination of bearing and shell adopts the base shaft system. The values of bearing size tolerance and rotation precision are stipulated in GB307 - 84.
2, the bearing and inner hole of the bearing and the bearing box are in accordance with the regulations of GB1031 - 83. The Ra value of the shaft neck roughness is less than 1.6 m, and the Ra of the bearing box inner hole roughness is less than 2.5 m.
3, when using GCr15 and ZGCr15 steel to make bearing rings and rollers, the hardness value of rings and rollers should be 61~65HRC. When using GCr15SiMn and ZGCr15SiMn steel, the hardness value should be 60~64HRC. The hardness testing method and the uniformity of the hardness of the same part are regulated by JB1255.
4, check the radial clearance and axial clearance of the bearing should be in accordance with the regulations of GB4604 - 84.
5, the inner and outer raceway of Conveyor roller should be free from spalling and serious wear, and no cracks should be found in the inner and outer rings. The ball should be free from abrasion, the cage will not be seriously deformed, and no abnormal noise or vibration will occur when rotating. Stop when it stops.
6, for C grade tapered roller bearings, the contact accuracy of rollers and raceway raceways should be examined under the action of a certain load. The contact traces should be continuous and the contact length should not be less than 80 of the roller busbar.
The life of bearings is closely related to manufacturing, assembly and use. We must do well in every link, so that the bearing can be in the best running state, so as to extend the service life of bearings.
1, the selection and control of the tolerance of the shaft and bearing room: the bearing should be flexibly and without block feeling after the bearing is pressed into the bearing. If the apparent rotation is not flexible, the size of the shaft is too large and the tolerance should be down. If the shaft has a sense of "sand sand" when the shaft is pressed into the shaft with the hand, it may be too large or the roundness of the shaft is not good. So it is necessary to control the roundness when controlling the tolerance of shaft and bearing room. At present, many domestic manufacturers only control the tolerance, and have no control on the roundness.
2, bearing assembly way: because the bearing is a high precision product, such as improper assembly, it is easy to cause damage to the bearing gully and cause the bearing damage. In the bearing assembly should have a dedicated mold, can not beat, in pressing axis only small force, only large force pressing circle. When assembling, it is required to use air pressure or hydraulic pressure. When the press is installed, the upper and lower die must be horizontal. If the inclination occurs, it will cause the bearing groove to be damaged due to the force and cause the bearing to produce sound.
3, the prevention of assembly of foreign matter: when the bearing is mounted on the rotor to do dynamic balancing, it is easy to enter the internal bearing of iron scrap produced by dynamic balance, so it is best to do dynamic balancing before bearing. Some manufacturers for ease of assembly, assembly of some oil or grease lubrication effect in the bearing house painted, but often the operator is difficult to control, if the oil or grease in the bearing chamber accumulates more, the bearing rotates easily along the shaft into the bearing. The best bearing room is not to oil or oil, if not coated, it should not be kept in the bearing room.
4, the prevention of paint rust: paint rust is characterized by multiple seals in the motor. When the motor is assembled, the sound is very good. But after putting it in the warehouse for a long time, the abnormal noise of the motor changes greatly, and the bearing is seriously rusted. In the past, many manufacturers would think that it was a problem of bearing. After our continuous propaganda, the motor factory has now
