Please excuse our appearance, our site is currently under construction.
Please excuse our appearance, our site is currently under construction.
These photos show some of the highlights from the largest double planetary mixer rebuild we've done so far. A Ross model HDM-200 industrial mixer weighing approximately 18,000 lbs.. This machine although originally well built, had seen many years of what we would consider "severe duty" service in an extremely demanding application. Our challenge was to not just rebuild the machine to it's original condition but to actually address the issues we found and improve upon the original design.
01/67
This mounting plate was machined from 1-1/2" thick steel plate rather than just two pieces of bar stock welded to the frame rails.
We drilled the frame rails and used twelve 3/4" grade 8 bolts (from underneath) to secure the mounting plate. The threads were lubricated and the bolts were torqued to 280 foot pounds for a clamping force of 30,000 lbs. (each bolt).
By shimming under the mounting plate, the gear reducer can be removed in the field and there is no angular misalignment to be concerned about during re-installation. A dial indicator is still needed, but the job is much simpler. We also installed positioning jacks to help align the mounting plate. These jacks helped us to line up the input shaft of the gear reducer correctly so we could place the motor exactly where we planned.
We used a 1" square drive torque multiplier to torque the gear reducer mounting bolts to 1,800 foot pounds for a clamping force of 87,000 lbs. (each bolt).
The motor was mounted on a thick plate that was machined flat and shimmed underneath so the motor is bolted directly to the mounting plate. The job of reinstalling the motor is much easier should it ever need to be removed.
Part way through the project, we determined that the main reason the air/oil lift cylinder was worn out was because the machine was very front-heavy. We decided to remove all the counterweights and re position them as far back as possible. We also re-located the motor all the way to the rear and we stacked some of the weights opposite the motor to help with the side to side imbalance.
Copyright © 2024 Heavy Duty Machine, Inc. - All Rights Reserved.
Powered by GoDaddy