What's the Name of This Type of Actuator?
What's the Name of This Type of Actuator?
(OP)
Can anybody help me out with the name of this thing? I'm just trying to experiment with something and I'm looking for the actuators (may not even be called that) that are used in rear hatches for SUVs and sometimes on screen doors on porches. The kind from the porch that just slowly hisses air out and gently closes the door.
Technicaly, I supposed both are just single acting linear actuators, but online all I can find are heavy duty ones, pneumatic ones and a bunch of fancy stuff. I need cheap, very low weight, low pressure ones like used for these 2 applications. Are they called something specific?
Technicaly, I supposed both are just single acting linear actuators, but online all I can find are heavy duty ones, pneumatic ones and a bunch of fancy stuff. I need cheap, very low weight, low pressure ones like used for these 2 applications. Are they called something specific?





RE: What's the Name of This Type of Actuator?
RE: What's the Name of This Type of Actuator?
RE: What's the Name of This Type of Actuator?
RE: What's the Name of This Type of Actuator?
RE: What's the Name of This Type of Actuator?
I basically just need something for an application that will slowly lower something a small distance, around 5-7 inches. The lower time should be at 2-3 seconds. The weight it will lower will be between 10-20lbs, and 4 of these dampers will be used total with the weight evenly dispersed. The main issue that many parts may have trouble with is that about 75% of this part will be submerged in oil that could reach up to 500 degrees F.
RE: What's the Name of This Type of Actuator?
RE: What's the Name of This Type of Actuator?
RE: What's the Name of This Type of Actuator?
No?
RE: What's the Name of This Type of Actuator?
The product would need to be fairly cheap, and the more I'm thinking of it the more I'm thinking that designing one myself may be the best option. Just think a typical cylinder and piston and a very small hole in the bottom. The piston can only compress as fast as the fluid inside the cylinder escapes the hole. If our manufacturer can deal with these tight tolerances then it's just a fluid dynamics problem after that.
RE: What's the Name of This Type of Actuator?
Getting oil to survive at 500F is a separate problem.
Forget any kind of elastomer seal on the piston; maybe a couple of piston rings if blowby is a problem.
Mike Halloran
Pembroke Pines, FL, USA
RE: What's the Name of This Type of Actuator?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: What's the Name of This Type of Actuator?
RE: What's the Name of This Type of Actuator?
Harold
SW2010 SP1.0 OPW2010 SP1.0 Win XP Pro 2002 SP3
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RE: What's the Name of This Type of Actuator?
(Sorry, typed all that before seeing EspElements post)
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: What's the Name of This Type of Actuator?
For a quick prototype, does anybody have any suggestions for which type of actuator, dashpot, damper, or gas strut would be cheapest, while having a stroke of at least 7" but not more than 10"? It would need to be able to be compressed with a force of about 4lbs, but something that requires a slightly heavier force could work (would have to be less than 10lbs though). Ideally, it would be elongated when no force is applied, like a gas strut is. Does anybody know of any of these which may be cheaply purchased and could fit this description?
RE: What's the Name of This Type of Actuator?