Mixer drives are the workhorses of the pulp and paper industry. To provide an industrial mixer with massive torque on a continuous basis – and in a harsh chemical environment – requires a drive with more brawn than your average gear reducer. And while sufficient torque output is, of course, a critical factor in selecting a mixer drive, it’s not the only characteristic that can make or break your mixer’s success.
When comparing mixer drives for your application, it’s also important to consider the following.
Size: The unbalanced hydraulic loads inherent in mixing applications require a heavy-duty reducer that can support the mixer shaft and impeller. Look for an increased diameter on the low-speed shaft and a gear housing designed to carry large bending moments and thrust loads.
Lubrication: A failed seal can result in oil contamination of your product. Look for a unit with a maintenance-free drywell with no moving parts, as this will pose no risk of failure. It’s also important to choose a drive with continuous oil circulation through the bearings in order to keep the unit running smoothly.
Bearings: To ensure the drive can withstand the necessary mixing forces, look for an extended bearing housing that allows for larger bearings – and can accommodate tapered or spherical roller bearings (instead of ball bearings), as these are best at handling thrust loads.
Mixer drives can have a huge impact on a mill’s profitability, so make sure you choose one that’s up to the task. When in doubt, consult one of our experts here at Mar-Dustrial – we have years of experience helping pulp and paper operations select the right drive for each application.
Posted under Products/Services, Tips and Tricks on Saturday, June 8th, 2013