rotary actuator

[aelvira]

hello to all, I am a new enrollment:

I have undergone a doubt to ask you... not being very experienced in the field
so in general how to dimension a rotary actuator? ? ?

I understand better than I'm dealing with and the nature of my problem. .
I am designing a solar concentrator on 2 axes of rotation. .

wind load 775 n and total weight is 170kg

How do I adjust for rotation on the longitudinal axis? and inserting a rotary actuator as I define the power? ?

Thank you.

 

[cacciatorino]

hello to all, I am a new enrollment:

I have undergone a doubt to ask you... not being very experienced in the field
so in general how to dimension a rotary actuator? ? ?

I understand better than I'm dealing with and the nature of my problem. .
I am designing a solar concentrator on 2 axes of rotation. .

wind load 775 n and total weight is 170kg

How do I adjust for rotation on the longitudinal axis? and inserting a rotary actuator as I define the power? ?

Thank you.

The question is too generic. What should your rotary actuator do? lift a weight? support him? win strong inertial loads? what frequency of insertion do you expect? What kind of actuator will be? open chain control? chain closed?

As you see, there are a lot of questions, you need to better analyze the problem, when you've circumscribed the field you'll be able to receive sensible opinions.
Besides, you're an engineer and an analysis is your job. :wink:

 

[aelvira]

It is only a solar concentrator so the actuator must support the weight and rotate the concentrator resisting the action of the wind. .

I have to understand in fact how to choose the engine that allows this rotation, of which type to choose it, and with what characteristics, power, etc...it is because I asked for suggestions and indications of maximum in this regard.

 

[zeigs]

I imagine it refers to a mirror that can be oriented horizontally and vertically.
put so rotary actuator is a little too generic. Do you have an idea of how the connection is done? creepy, willing, etc. and handling? Eletric, hydraulic... chain transmission, gear? then: above all the vertical movement: should it be self-locking? In this case I would see an endless routa-vite well, for example (if it must chase the sun should not be particularly fast...) what angular race is spoken? if it is a few degrees you can also use linear actuators
for power, if you balance it well you can think of only inertias and frictions
and how do you say hunting, how must the control system be?
many questions:wink:
Hi.

 

[aelvira]

help as many questions! !
therefore it is a parabolic mirror that is oriented horizontally and vertically. .
I thought about adjusting the movement of the mirror with a linear actuator and (think but now I have more doubts than before...) with a rotating actuator. .
for now I have completed the optical analysis of the mirror and the thermal analysis to evaluate the reached tmax. .
remains the part for me + painful...that is to understand what types of engines to use.
for the linear attraction I rated what length of ride must have and what power.

how do I rotate this toy?? here I was considering the possibility of using a rotary actuator... but how to choose it? ?

the speeds in play are very low..it is as if it were still, but I need a precision < 1°

Can I just consider frictions? and the resistance of the wind?

 

[aelvira]

I forgot.. .as regards automation I had initially thought of putting 2 photodiodes, step-by-step scooter, reducer, motor driver and capture card.

 

[Fulvio Romano]

as a keyword, instead of "rotating actuator", use "servomotor".

Something like that:http://www.robot-italy.com/index.php?cpath=85&oscsid=52f4d29f9d848090479105f04b6387b5I don't know the loads in the game, I haven't read all the thread, and now I don't have time, but leave here and see what you find.

 

[gerod]

Let's say that those data you put is insufficient for sizing.
to dimension a transmission also serves (following the hunter's iter):
- the slow axis rotation vel.
- the number of cycles
- if the load is supported or not (I would say it would be better to support it)
- swallowing
etc.

 

[zeigs]

do one thing: try to baptize type of movement, transmission (they are choices you have to make to make calculations) and throw down some drawings. then post them perhaps with the scheme of applied forces. then let's go a little further on the end as tips

 

[lucavimo]

Hi elvira,
I can recommend a rotary actuator that develops 350 nm that has the ability to be controlled via a 4-20ma signal for position regulation.
the actuator is not reversible therefore after placing the position cannot be moved by forces like the wind until the reception of the new positioning signal.
These actuators are used for the regulation of industrial valves therefore have a degree of protection ip67 (suitable to stay under the weather).
if you need more information contact me as well.

Hello, luca.
www.valmek.com

 

[sampom]

Hi elvira,
I can recommend a rotary actuator that develops 350 nm that has the ability to be controlled via a 4-20ma signal for position regulation.
the actuator is not reversible therefore after placing the position cannot be moved by forces like the wind until the reception of the new positioning signal.
These actuators are used for the regulation of industrial valves therefore have a degree of protection ip67 (suitable to stay under the weather).
if you need more information contact me as well.

Hello, luca.
www.valmek.com

..luca, luca

apart from having spent 7 months I wish my friend alison has solved his doubts:smile:

you are a new user to the first message, I invite you to read the rules:http://www.cad3d.it/forum1/showthread.php?t=13677would be the first thing to do at the time of registration.

as a presentation (which you did not..) debut with a first post advertising products of your company; It doesn't seem very correct, does it?
In addition, you do not answer the question that asked how an actuator (which is then the "technical goal" of the forum). to buy them beautiful and ready are capable all.

greetings
Mar