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Linear drive (double acting)

Former Member

Hello,

I am trying to replace a double acting pneumatic cylinder by an electric driven linear drive.

 

A two segment funnel is opening by the cylinder. The product in the funnel(0.2-2Kg) helps to open. To stop the funnel from opening a force of 70 Newton is needed. This pull-force is needed for 3 second out of the 4.

 

The specs i need are the following:
Stroke: 25mm
Pull Force: 70 Newton (only when stroke = 0)
Push force: 5 newton(when stroke is +20mm)
Duty cycle: 80%

 

 

 

I hope this is all the information needed, if not, i'd like to hear.

 

Kind regards,
Stef

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  • Hi Stef,

     

    Perhaps these parts may be useful: Nanotec: L35 Linear Actuators with Lead Screw/Fine-Pitch Screw

    (Just a guess - I'm no expert).

    By the way, this post is in the wrong place, 'Linear Technology' is the name of a firm that make microchips, not linear drives.

    Easy to get wrong if you're not familiar with the firm LT.

    Probably 'Industrial Automation' might be the best place.

  • in reply to shabaz

    Hi,

     

    Thank you for reminding me to move the discussion to the right topic and helping me out.

     

    The following note makes me questioning the actuator:
    "Please note: The force and power ratings specified in the data sheets are based on a duty cycle of approx. 10% to 20% and must be reduced accordingly for higher values."

    WIth this type of actuator a duty cycle of 40% is needed. For example, with a solenoid a constant power is needed to keep the funnel closed and so the duty cycle will be around the mentioned 80%.

    Because the actuator will be used in a "dirt flying/sandy" environment the threaded screw wouldn't be the best pick i guess.

  • in reply to Former Member

    Unfortunately I don't know of a suitable part, that was just a best-guess selection from me, but I think it would be worth giving them a call/e-mail, in case they  have something in their product catalog that more closely suits your needs.

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