Ameridrives was contacted to provide a solution. Gear couplings were initially installed on all the polymer pumps between the pumps and gearboxes for this high-torque, low-speed (50 RPM) application. However, while plant maintenance crews did their best, keeping all the expensive gear couplings properly lubricated throughout their plants around the world proved to be a tough challenge.
After careful review of the situation, engineers recommended replacing the gear couplings with Ameriflex diaphragm couplings, which can run continuously and require no lubrication or maintenance (unlike gear couplings which require maintenance at six-month intervals).
Ameriflex couplings are typically used on high-performance, high-speed applications. However, the team collaborated with experts to provide custom-designed diaphragm couplings to meet the resin pump requirements. Many custom couplings were delivered in a variety of sizes and configurations with torque ranges up to 1,100,000 Nm (10,000,000 in.lbs.). One example is a 10′ long, 23″ diameter coupling (shown in upper left) that features specific split retaining rings on both the pump and gearbox end hubs, multiple convoluted diaphragm pack flex elements at each end, and a special spacer configuration for added stiffness in this dual output application. An integral indexing/timing device aligns the coupling with the mixing blades of the polymer pump.
Altra Industrial Motion
www.altramotion.com