Vibrating screen bearing damaged how to do? These methods can make vibrating screen bearings more durable

Vibrating screen is the commonly used equipment in mining machinery and equipment, and its vibration produced mainly by the vibrator to complete, and the use of vibrator working conditions, and under the intense impact vibration, so the bearing cannot prevent can present the phenomenon such as fever, burn out, seriously affect the normal operation. This article to share vibrating screen bearing damage reason and processing method. One, design reason 1. The use of bearing selection unreasonable bearing type, the size of the limit speed, the device coordinates, clearance, smooth performance since the request is higher, general bearing under the condition of work is easy to damage. If the improper design of bearing early selection, bearing use life will be shorter. The solution: choose special bearings. Ordinary common vibrating screen bearing cylindrical roller bearing and spherical roller bearing. Both have large radial bearing ability, the former accept limit rotational speed is high, of the dynamic and static load bearing ability is strong, but for the bearing hole of the coaxial degree higher request; The latter self-aligning performance is good, can compensate for forming the misalignment problem of bearing hole processing, but can't accept pure axial load. 2. Smooth seal structure design is not reasonable at present domestic many vibrator bearing adopts fat smooth, labyrinth seal structure, common seal clearance in 1 ~ 2 mm. But in practice, with the increase of vibrator bearing temperature, smooth fat viscosity reduced gradually, the spindle at high speed, smooth fat from the maze in maze cover cover leaked from time to time, eventually cause bearing damage due to shortage of smooth. Since smooth seal structure design is unreasonable, bearing is not smooth, is incurred to accept thermal deformation, axial and damage the main reason. The solution: use thin oil slick way, improve the smooth channel, improvement of sealing structure. Nowadays, many factories adopt thin oil circulation is smooth, the separation of labyrinth seal and other non-contact seal structure. 3. Bearing and the bearing hole with incorrect bearing and the bearing hole tolerance is the key of the design. If the choice is greater than surplus to cooperate, will force bearing raceway geometry deformation shape, abnormal vibration during operation. If choose the larger clearance fit, can make the bearing outer ring in the relative sliding bearing hole, rose sharply from bearing damage. Selecting the solution: reasonable tolerance. Bearing inner ring with shaft adopts loose or transition fit clearance fit tolerance, outer ring and the bearing holes are relatively tight interference fit tolerance of the transition or smaller. 4. When the design not think shaft vibrator operating temperature normal expansion amount in 35 - 60 ℃, due to the heat bilges cold shrink the scale of the shaft cannot be ignored. The solution: will end bearing designed transition or clearance fit, so that the vibrator shaft in heat bilges cold shrink can be related to the inner ring to stop the slide. Second, the process for 1. People who share the shaft bearing hole of the machining accuracy is not enough, two different bearing hole. The solution: the processing of high precision equipment, CNC boring and milling machine or machining center, two bearing hole cutting completed at a time. 2. Uneven force bearing assembly, such as in cold assembly process, applying pressure on bearing inner and outer ring, cause bearing inner and outer circle has certain deviation, relative shaft or the bearing hole will wear in the process of running faster. The solution: use special tooling, make the bearing inner ring and outer ring mean compression in the process of assembly, assembly in place. 3. Not clean clean when bearing device, or smooth oil is not clean, cause bearing raceway wear and friction roller increases, temperature, the bearing damage. The solution: bearing cleaning clean before assembly. Vibrator using regular change in the smooth oil, first in smooth oil after equipment use 150 h, each running 1000 h after change. 4. Group eccentric block quality difference, or group of eccentric block device Angle error is bigger, a source of center trembling, formation of bearing heating. The solution: adjust the eccentric block and quality point of view, the symmetry. Or adjust the exciting force, the device will make of the eccentric block Angle difference on the same shaft, eccentric block Angle on the parallel axis symmetry. Three, use and maintenance for 1. For root uneven or spring seat unit is not correct, the abnormal motion of sieve body, cause vibrating screen rotation or distorted, damaged vibrator bearing heating. The solution: adjust the toes in its degree. The device, you can use level meter measurement based degree, such as uneven can pass on the toes and stop adjustment plate. 2. Vibrating screen great error in the center of gravity, provoked the screen body is not functioning, damaged bearing heating. Ideal working state is the solution: vibrating screen machine stable running, everywhere amplitude differences, therefore, strict control of product manufacturing, and installation accuracy, guarantee not offset center of gravity position, there are both at the same time as far as possible into the material. 3. Vibrator fixed bolt looseness, or without locking spring washer, provoked source center shaking, the damaged bearing heating. The solution: first use vibrator, 2 h and 50 h after operation to re-examine the bolt, found loose fastening immediately. 4. Improper selection smooth oil, fill too little or too much, will be provoked bearing heating. The solution: under normal conditions, should include smooth smooth oil cavity two-thirds of advisable, too much easy fever, and a certain exhaust exhaust bolt. Under the condition of normal without leakage, and 80 - vibrator Inject a smooth oil 100 h, are no more than 1 kg, a filling and discharge waste oil in time. Vibrator is the power source of vibrating screen, advances the design and processing quality, and the correct use and careful maintenance is the prerequisite of vibrator bearing good operation condition.