If fag bearing can be used correctly without selection error, it can be used for a long time before the service life of plane needle roller bearing. On the other hand, there are unexpected early damage, and the early damage that can not withstand use.
As the cause of this early damage, insufficient consideration is given to the use of lubrication, and then there are foreign matter intrusion, large bearing assembly error and shaft deflection, insufficient research on shaft and bearing housing, etc, There are many cases where these reasons coincide with each other.
In the comparative study of the design life of various machines and the limitations of various durable bearings, the fag bearing size is determined at the same time. In choosing fag bearings, planar needle roller bearings tend to think that the grease life, fatigue life, wear resistance and low noise also need to be fully studied.Performance Characteristics of Clearance Maintenance of Fag Plane Needle Roller Bearing
Performance Characteristics of Clearance Maintenance of Fag Plane Needle Roller Bearing
When the fag bearing ring rotates under load, if it is installed with clearance fit, the mating surface of the ring will creep during the rotation of the plane needle roller bearing, which is easy to produce fretting wear. At this time, the mating surface will be burned, cracked and other damages. Therefore, interference fit shall be adopted for the fit between the ring bearing the rotating load and the journal or seat hole of mechanical parts.Performance Characteristics of Clearance Maintenance of Fag Plane Needle Roller Bearing
In the supporting part of the machine, the plane needle roller bearing should be positioned and fixed according to different requirements in radial, axial and circumferential (tangential) directions. Generally, the axial fixation of fag bearing is realized by axial closure or partial radial tight fit. The bearing on the free side of the mechanism support is often not fixed in the axial direction to compensate for the dimensional change of the mechanism system in the process of axial installation or thermal expansion and cold contraction.Performance Characteristics of Clearance Maintenance of Fag Plane Needle Roller Bearing
1. High support accuracy, stable and reliable operation.Performance Characteristics of Clearance Maintenance of Fag Plane Needle Roller Bearing
2. It can operate in high temperature, cryogenic and vacuum environment.
3. Complex structure, demanding conditions, magnetic interference to the environment, but no other pollution.
4. Low friction, low power consumption and ultra-high speed operation.
5. DC excited bearing can only be active type (active type).
Passive bearings shall be used in at least 3 directions, while passive bearings can only be used in at least 1 direction.
7. Repulsive magnetic bearing is rarely used because of its low magnetic utilization and complex structure compared with suction type.Performance Characteristics of Clearance Maintenance of Fag Plane Needle Roller Bearing
8. The pure electromagnet bearing can only be a 5-DOF control bearing, with large volume, mass and power consumption.Performance Characteristics of Clearance Maintenance of Fag Plane Needle Roller Bearing
Under normal circumstances, the temperature of double row deep groove ball bearing should be about 30 ℃, and the high temperature should not exceed 70 ℃. Otherwise, it will deform due to the high temperature of the bearing, which will directly damage the jaw crusher in serious cases, and even lead to the explosion of the machine. Therefore, it is more urgent to be vigilant about the bearing temperature of jaw crusher, especially in summer.
1、 The bearing is worn or the cage is damaged. 2、 The tightening bushing moves axially. 3、 Bearing oil is cut off or too much oil is injected. 4、 The position of the counterweight of the flying sheave of the crusher deviates and the frame jumps. 5、 The oil hole is blocked and the oil cannot be added. 6、 It is not the temperature rise of the bearing, but the friction and heating between the movable jaw sealing sleeve and the end cover, or the double embedded cover of the frame bearing seat rotates with the main shaft, and the friction and heating.
1. Keep the bearing lubrication clean
Before inspecting the double row deep groove ball bearing, the surface of the bearing shall be cleaned first, and then the oil seal of the bearing and its surrounding parts shall be carefully inspected. If there are bad symptoms, it must be replaced. The bad oil seal will cause damage, make the cloud of the bearing abnormal and cause the shutdown of the equipment.
2. Pay attention to covering exposed bearings
When inspecting the bearing, do not expose the double row deep groove ball bearing to pollutants or moisture. If the work is interrupted, the machine shall be covered with oil paper, plastic sheet or similar materials. If it is possible to clean the naked bearing without disassembly, clean it with a brush coated with petroleum solvent, and then wipe it dry with a piece of lint free cloth or blow it dry with compressed air (be careful not to start the rotation of the bearing assembly).