Machinery Lubrication magazine published by Noria Corporation
Issue link: https://www.e-digitaleditions.com/i/957021
30 | March - April 2018 | www . machinerylubrication.com in mind that these systems must be inspected on a regular schedule to ensure they are working properly. No automatic lubrication system should ever be implemented on a "fit and forget" approach. Lubricating Gearboxes Conveyors typically are driven by different types of reduction gear- boxes, including worm gearboxes, to allow the electric motor to sit adjacent to the conveyor and not protrude excessively. In these instances, a simple oil with the appropriate viscosity can be used. e lubricant does not necessarily need to possess extreme-pressure properties. Gearboxes and bearings are also found in numerous crushers within the infeed section of the quarry. ese components must cope with the same issues as conveyors in terms of dust. Centralized greasing systems are commonly used here, since the bearings are located close to each other, ensuring that the pipe runs are not too long and the grease reservoir can easily be housed inside. These gearboxes generally are quite large and have a substantial oil capacity. e gear teeth often experience high shock loading, so extreme-pressure gear oil is frequently used for this reason. Crusher gearboxes benefit greatly from regular oil analysis and condi- tion monitoring. e small oil sample required does not affect the overall oil level, and the information gained from the subsequent analysis can save a considerable amount of money in avoiding unplanned downtime and the associated costs of lost production. Open Gears ere are many different types of open gears associated with cement plants, along with different lubri- cants and application methods. e main requirement for these open gears is that the lubricant be able to adhere for the entire revolution of the driven gear in order to offer the needed protection. is lubrication requirement occurs when the driving pinion is mating. erefore, the best lubricants for these applications are sprayed onto the teeth just before the pinion and driven gear mate. e spray pattern is critical for the coverage of the mating teeth to be sufficient. Normally, the lubricant is sprayed directly from a barrel due to the quantity required. e lubricant may also need a certain degree of heat resistance and must not melt away. Both greases and thick oils with tackifier additives can be used, as long as they can be sprayed. ey must also have the proper load-carrying ability to withstand the potentially high loads that will be experienced. Conventional greases are not suit- able, since they do not possess these attributes. Be sure to inspect the gear teeth on occasion to check for uneven wear, which could indicate ineffective lubricant coverage. Rotary Kilns Rotary kilns have their own lubrication challenges for both bearings and gearboxes due to their slow rotation, high loads and thermal transfer of process heat. It is common for gearbox oil to be used LUBRICATION PROGRAMS A cement trolley rail