Permanent magnet drum magnetic separator end bearing seal structure improvement

Permanent magnet drum magnetic separator 2018 - end bearing seal structure improvement 09 - 19 in jinan steel city mining co. , LTD dressing system of permanent magnet drum magnetic separator 8 units, its more than 95% of the failures are caused by the end bearing seal failure, magnetic separator in normal use after 2 ~ 3 months, you have to check and replace the lubricating oil and skeleton oil seal, if change not in time, there will be a bearing damage, damage to the shaft wear and magnetic system, such as equipment accident. Due to the separation system is 24 h uninterrupted production operation mode, failure that caused production systems across the board, seriously affect the normal production. 1, the original bearing seal structure problem magnetic separator end bearing used enchase inside a bearing gland structure of rubber skeleton oil seal and grease, as shown in figure 1. Close bearing gland from bearing, from gland and journal clearance into the pulp in the short term will disable skeleton oil seal, eroding bearing of the working face, cause premature bearing failure. If the fault cannot be ruled out in time, enter the bearing in the pulp and exacerbate the grinding of bearing box, the main shaft. Wear of bearing housing and shaft lost isolation pulp into the cylinder, pulp once in the cylinder was adsorbed on the surface of magnetic system, magnetic magnetic system will be blocked the movement of the clearance between shell and, to rotate the cylinder cannot, serious when magnetic is completely out of the jaw, so that the magnetic separator scrap. 2, the bearing seal structure improvement aiming at these problems, the company of magnetic separator bearing seal structure was improved, as shown in figure 2. Extended the bearing gland in the neck, and head of the spindle axis transverse leveling agent, within the gland application skeleton oil seal, such as multiple sealing packing water and grease. Skeleton oil seal installation in gland front to sealed bearing; Water-based pan-gen installation, in the end of the gland to isolate may enter the gland with axial clearance within the pulp; Between skeleton oil seal, water-based pan-gen sufficient amount of grease, may enter the gland and axial clearance within the pulp in isolation, and always maintain the skeleton oil seal lubrication, prevent the skeleton oil seal failure due to material premature aging. Improved the structure of bearing seal structure adopted multiple sealing, improve the reliability of the bearing lubrication, eliminates the pulp of bearing box, gland and the spindle axis neck of wear and tear. Magnetic separator bearing service life from before modification of more than 3 months to 12 months, basic to eliminate the shaft failure caused by bearing damage, damage of magnetic system and other large equipment accident.