Topic: Re: Designing a Support Bracket for a Baffle

posed by
The baffle supports must be designed to handle the torque input by the mixer.&nbsp; Mixer torque should be calculated using the motor power and dividing by pi times the mixer shaft speed, with the proper conversion factor for units.&nbsp; The torque formula for power in horsepower, shaft speed in revolutions per minute, and torque in inch-pounds is torque [in-lbs] = 63025 * motor horsepower [hp] / output shaft speed [rpm].&nbsp; Note that the correct speed to use is the mixer shaft speed, not the motor speed.&nbsp; A speed reducer is a constant power device and a torque increaser.
A variety of methods can be used to get from the input torque to the baffle loads.&nbsp; The simplest method is to simply distribute the torque input to a force load on each baffle, dividing by the number of baffles and the distance from the tank center to the tips of the baffles.&nbsp; Then the baffle thickness, supports shape, number of supports, etc. must be designed with adequate strength.&nbsp;&nbsp; Using maximum design limits of 6,000 psi for shear stresses and 10,000&nbsp; psi for tensile stress levels usually works well for steels, carbon or&nbsp; stainless.&nbsp; These strength levels take into account that the failures will occur because of fatigue, not yield strength.
The dimensions given are not sufficient to provide more detailed calculation.