Hi all!
I need to size a motor that aims to turn a worm screw and two gears, to operate two rotating lates (objective deployment and retraction of the two lates at 90 degrees)
The weight of the two lates is 20kg.
Can you help me on the way forward?
Hello @kunet
Before I even start answering you, I already see two big mistakes in your design and missing information to help you completely
The first thing that doesn't work is to have the same gear for the worm screw and to mesh the second gear.
Indeed, they are not at all (but then not at all) the same tooth profiles.
So to remedy this, you just have to put your worm screw between the two gears. In this case, only the spacing between the two gears is to be changed by the value of the thread bottom diameter of the worm screw.
After you indicated a weight for your slats but what counts in your case is the inertia and not the weight (even if the latter is useful to know the inertia) Indeed the forces relating to the weight are strictly vertical so the weight is not the dominant factor.
Then you have to read between the lines because on your drawing I see the notion of wind. If I'm not wrong and it's windy then the max value of it should be taken into account for the efforts.
Moreover, when you say battens you should have the shape of them (I hope they are not propellers) and the exact size as well as the material to know the mass (useful to know the inertia).
You have to indicate how long it takes you to go from 0 to 90°. All these elements are useful in defining the torque of the motor and the speed at the output of the gearbox.
( TO BE CONTINUED.... )
Hello
To begin with, you need to know the dimensions of the whole mechanism:
- Gear / screw diameter (roughly reduction ratio) It can play on whether or not you need a reducer on the motor.
- friction coef
- Possible force on the battens / inertia which affects the torque of the motor
- desired batten deployment speed, which determines the speed of the motor rotation
- type of power supply and operation of the motor: continuous, single-phase or three-phase or also step-by-step.
- whether the motor will be controlled directly or via a variator.
This is the kind of information that allows you to define an engine.
Kind regards
I'm thinking more of wings than a propeller.