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Questions tagged [pistons]

37 questions
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Schematic Reading - Fluid Control Limit Switch Question

Does limit switch LS1 remain pressed on until the piston moves to LS2?
Anna Clarke
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Is there a mechanism that can turn circular motion into alternating circular motion?

I'm trying to power and agitator (alternating circularly back and fourth) with a crank. I've seen a bunch of complicated mechanisms that do this, but I'm looking for the mechanically simplest method.
user379468
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How Can You Calculate Force to Overcome Friction From an O-Ring Seal?

I essentially have a piston in a tube that is sealed with an O-Ring and actuated with a solenoid. The friction of the O-Ring however, is higher than estimated (guessed as far as I can tell) by the designer who doesn't have any calculations to show…
Petrichor
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Spring - Piston with different extension and compression rate

I am in need of a device that extends freely without much resistance but compresses slowly. I can provide a door closer analogy.The door should open fast but close slowly.... Do you think this can be achieved? Basically my idea is to come up with a…
raj'sCubicle
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Design Input: Rotary motion to Linear motion, What system should I choose?

I am posting this here because of the multidisciplinary knowledge needed to tackle this issue. Problem: I have to make an electromechanical device that is required to have controllable (downward) piston strokes, that can up to deliver 500N of force…
Jake
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Calculating leakage in an all steel piston cylinder arrangement

I wish to calculate air leakage in a piston cylinder arrangement. One side is pressurized and the other is at atmospheric pressure. All steel construction. No piston rings or lubrication. The piston oscillates at about 50 to 80 times per sec,…
Devidas Bhonde
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how are these radial piston rotors machined

A typical radial piston rotor can have simple holes machined from the outside through the inner diameter to create flow channels for hydraulic fluid to actuate the pistons. I came across this model and I was wondering, how would something like this…
hydrodyno
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Fluid for mechanical lubrication and hydraulic connection to plastic/rubber parts

I have a piston made of anodized aluminium and stainless steel with nitrile seals which I need to connect hydraulically to our system which mainly consists of silicone rubber with polycarb and acrylic parts, but I'm having problems finding a fluid…
Oliver Walters
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Are there design reasons why there aren't pneumatic pistons for chairs with a stroke >= 400 mm?

In the interest of saving space, I'd like to have a stool that can double as a table. I'd like the height to be adjustable from 16 inches to 32 inches. But I can't find any pneumatic/spring piston with such a long travel (10" at most). It seems the…
Yale Zhang
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Why there is no piston style pedal bicycle?

I have interested in walking bicycle. For the concept is just bicycle that you don't cycling pedal but stepping or striding to drive wheel Which leads me to think that is it better if we use linear or ellipse motion of leg to transmit to bicycle The…
Thaina
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Is there a mechanism that allows this kind of piston/plunger movement?

I am trying to create a prototype for a gravity energy storage system, and I need to release potential energy stored in a heavy load of mass M, raised to a height *H. I intend to use the mass traversing the length, to drive a piston, which pushes…
Homunculus Reticulli
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Circuit to provide position control for double action hydraulic actuator

I was wondering how to construct a hydraulic circuit to control a hydraulic double acting piston/actuator enabling the electronic control of the piston extension. I have found the following pneumatic solution. However, I am not sure if this can be…
user19440
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Solenoid with 3mm stroke and ~1ms response time possible?

I need to extend and retract a needle as fast as possible with dwell time while retracted, while one option I really like would be to use Scotch Yoke with dwell. However that would mean the stroke and dwell times are a fixed ratio where as ideally…
norlesh
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Cylinder's surface condition of gas springs (gas struts)

I've discussed part of these question somewhere else, but realized I have to be more specific about it. I'm new to this site and hope I'm doing the right thing. I'm planning to manufacture gas struts used in kitchen cabinets; therefore, firstly,…
Amir
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How can I make inside a LSAW pipe uniform and smooth?

I am using a LSAW 16mm(OD) pipe, and I need to have a smooth and uniform surface inside it so a piston can reciprocate easily inside it. What is the best and fastest way to remove the inside weld line? It is going to be part of a production line,…
Amir
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