The Mongolian Mining 2020 International Mining and Petroleum Expo will be held from April 8 to 10, 2020, at Buyant Ukhaa Sports Palace in Ulaanbaatar, Mongolia, for the 10th consecutive year. The 10th Expo will showcase Mongolia ’s traditional mining and emerging oil industries, with exhibitors and visitors representing major companies and many professionals in the industry. Also, the organizing committee will hold seminars with guest speakers from the government and its institutions, academic scholars, and business professionals, covering the government ’s mineral resources policies, as well as new laws, mining, and infrastructure projects that adapt to Mongolia, trends And predictions, etc.
Bearings used in large-scale mining machinery are used in harsh environments. Usually, the equipment is operated continuously for 24 hours. The typical bearing damage cases are analyzed. The service life of the bearings can be improved by improving the heat treatment process—dustproof bearing.
The main types of mining machinery bearings:
1. Needle bearing
The needle roller bearing is equipped with thin and long rollers (the roller length is 3 ~ 10 times the diameter, and the width is generally not more than 5mm), so the radial structure is compact, and its inner diameter size and load capacity are the same as other types of bearings. The diameter is the smallest, especially suitable for the support structure with limited radial installation size. Needle roller bearings can be used without inner ring bearings or needle roller and cage assemblies according to different occasions. At this time, the journal surface and the housing that match the bearing The whole surface is directly used as the inner and outer rolling surfaces of the bearing. To ensure the load capacity and running performance of the bearing with the ring, the hardness of the surface of the shaft or shell hole raceway, the machining accuracy and surface quality should be combined with the bearing ring. The needle bearing is a bearing unit composed of a radial needle roller bearing and a thrust bearing component. It has a compact structure, small volume, and high rotation accuracy. It can bear a specific axial load while taking a high radial load. And the product structure is diverse, adaptable, and easy to install. Combined needle roller bearings are widely used in various mechanical equipment such as machine tools, metallurgical machinery, textile machinery, and printing machinery. They can make the mechanical system design very compact and smart.
2. Self-aligning ball bearings
Self-aligning ball bearings: Bearings equipped with drum rollers between the inner ring of the two raceways and the outer ring with spherical raceways. The center of curvature of the raceway surface of the outer ring is consistent with the center of the bearing, so it has the same self-aligning function as the self-aligning ball bearing. When the shaft and casing deflect, it can be adjusted automatically without increasing the bearing burden. Spherical roller bearings can withstand radial loads and axial loads in two directions. Self-aligning ball bearings have a large radial load capacity and are suitable for heavy loads and impact loads. The inner diameter of the inner ring is a tapered bore bearing, which can be installed directly. Or use an adapter sleeve and dismounting cylinder to fit on the cylindrical shaft. The cage is made of steel stamping cage and polyamide. Self-aligning ball bearings are suitable for bearing heavy and shock loads, precision instruments, low-noise motors, automobiles, motorcycles, metallurgy, rolling mills, mining, petroleum, papermaking, cement, and press Sugar and other industries and general machinery.
3. Deep groove ball bearings
Working principle: Deep groove ball bearings mainly bear radial load, and can also carry radial load and axial load at the same time. When it only takes the radial load, the contact angle is zero. When the deep groove ball bearing has an ample radial clearance, it has the performance of an angular contact bearing and can withstand a large axial load. The friction coefficient of the deep groove ball bearing is minimal, and the limit speed is also very high.
