Questions tagged [pneumatic]
The pneumatic tag has no usage guidance.
42
questions
2
votes
1answer
30 views
Can I submerge a pneumatic cylinder in oil?
I am looking for a linear pneumatic cylinder to raise and lower a fixed object. Everything will be submerged in oil (for electrical purposes). I am new to engineering and pneumatics in particular, and ...
0
votes
0answers
33 views
How do you calculate consumption given standard values in pneumatic cylinders (ISO 155552 Standard)?
The values I was given are:
Force of advance= 50 kgf
Total displacement= 3 cm
Displacement= 45 seconds
The Standards table I was given shows kgf/cm^2 so I should do 50/(3^2) right? Which is 5.6 ...
0
votes
0answers
16 views
Reality check: Sub-sonic convergent nozzle for raising gas velocity to achieve required velocity head
The situation is as follows: atmospheric air is accelerated to 5 m/s with an idealized disk actuator, then passed into a convergent nozzle such that it's velocity is raised to 339 m/s and then flows ...
0
votes
1answer
19 views
Emulate impact forces using pneumatic piston
I am trying to test a piece of furniture based on a particular code, the code states that i can either drop a bag (with a specific shape) of 57 kg 1.2 in above the seat or I can use other methods as ...
0
votes
1answer
11 views
How to ensure uniaxal and uniform force application on uneven samples using pressurized fluids
I am trying to apply a compression force to samples using air. I do not want to directly apply my loading since my samples are irregular. I do not wish to process them with a flattening step. I hope ...
0
votes
0answers
17 views
Hub Mount Motor to Flange Mount
I have spec'd out a pneumatic motor with acceptable torque for a tension application. The motor has a 1.25" hub with set-screw indent for it's mounting method.
Since this a prototype system, I don'...
1
vote
2answers
59 views
Designing a pneumatic system for consistent pressure/flow
Fellow engineers, I need your help in improving my design for a pneumatic system for maintaining a constant supply of at least 90 PSI and 20 CFM for a particle analyzer with stringent air requirements....
0
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0answers
47 views
Volumetric & Mass Flow Rate Through a Piston-Cylinder Annular Gap with Laminar Flow?
I am attempting to define the proper equations used to calculate both volumetric and mass flow (based on pressure differential) through a Laminar Flow Element. The element consists of a piston ...
0
votes
2answers
36 views
Ideas needed: how to tilt a panel side to side [closed]
requirements:
a panel of wood 4 ft long by 2 ft wide laying flat
this panel should be able to tilt side to side (2 way)
the weight on the panel will be about 250 lbs up to 400 lbs.
controlled lift of ...
1
vote
0answers
16 views
Is this Proportional Electro-pneumatic valve a direct replacement for other valves listed?
In the midst of trying to redesign the pneumatic subsystem of a combined system, I'm at the point of validating a new valve would serve as a direct replacement. The reason for the redesign is an ...
5
votes
0answers
133 views
I want to understand this pneumatic circuit
I have trouble understanding the following pneumatic circuit diagram:
I am new to reading circuit diagrams and i am unfamiliar with some of the symbols. I would appreciate if somebody could explain ...
1
vote
0answers
34 views
Choosing a blower for a Pneumatic Conveyor
Basically we are designing a pneumatic conveyor system for transferring 11 tons of beans per hour.
We need to decide on the specifications of the blower. What are the calculations necessary to decide ...
1
vote
1answer
131 views
Pneumatic cylinder: Pressure rating
I want to create a Pneumatic cylinder, The purpose is, Inside it will will contain a Nylon piston, and one end will be filled with clay. Cylinder will be closed from either side using end caps, which ...
1
vote
1answer
64 views
How do I connect pneumatic components with metal tubing?
I'm building a small pneumatic control cabinet with a couple filters, regulators, valves, and flow restrictors. I had started by using 8 mm push-to-connect fittings and nylon tube, but it seems I can ...
1
vote
1answer
60 views
What is the “quick bleeder valve” in this tool changer pneumatic schematic (and other questions)?
I'm building a CNC router around a HSD ES330 spindle motor that has pneumatic tool-changing ability. The manual recommends the following pneumatic circuit:
I'm not sure I understand the purpose of ...
1
vote
1answer
41 views
Why were pneumatic thermostats commonly installed in buildings?
According to Wikipedia, pneumatic thermostats were invented after electric thermostats.
Yet this article claims that "at least 25 percent of U.S. commercial buildings are served by pneumatic controls,...
1
vote
1answer
21 views
Best balance of electrical and pneumatic control lines in CNC router table?
I'm building a 4' x 8' gantry-style CNC router table. The spindle motor uses pneumatics to power its draw bar (for automatic tool changes). There are three separate pneumatic supply lines that go to ...
1
vote
2answers
865 views
What's the difference between a vacuum regulator and pressure regulator?
When browsing through pneumatic parts, I notice that some vendors specify different components for pressure regulator and vacuum regulators. SMC for example does this.
I'm curious why vendors would ...
0
votes
2answers
118 views
Is it standard practice to use a pressure relief valve as a pressure regulator?
I'm attempting to understand the difference between a pressure relief valve and a pressure regulating valve. From my research far, I've come to the following conclusion:
Pressure relief valves are ...
1
vote
1answer
836 views
How do you interpret a pneumatic regulator symbol?
I'm an EE trying to interpret a pneumatic schematic and have a few questions regarding the symbols being used.
I've come across two different regulator symbols (or so I believe them to be regulator ...
0
votes
1answer
51 views
How to maintain a static negative pressure in a valve?
My target is to create a valve with multiple inlet capillaries. And my output is a pipe of a larger diameter. I do not want to use any electrical systems, and at the same time, I want to maintain ...
0
votes
1answer
108 views
What type of pneumatic valves would represent the valves in the schematic?
What type of pneumatic solenoid valves would represent the valves in the schematic?
Specifically, the lower valves could be represented by a 5 port 4 way 2 position valve. This is because there is ...
2
votes
1answer
43 views
Pneumatic actuator capable to achieve 5m/s?
Is there a pneumatic actuator capable to achieve 5m/s and will be good idea for constant work? I know SMC have up to 3m/s, but I can't find faster.
2
votes
1answer
100 views
How to connect a pneumatic cylinder to a door?
I have this pneumatic cylinder that I wish to connect to a wooden door in order to make it kinda like a Star wars door. I'm wondering what the best way to connect the cylinder to the door would be.
...
1
vote
2answers
42 views
Cylinder Reconditioning [closed]
When reconditioning of a pneumatic cylinder, which fit between piston and cylinder is required? and how much tolerance between mating parts is required?. Will surface finish inside of cylinder play a ...
2
votes
2answers
542 views
Lpg cylinder to compressed air tank
I am building a small robot having pneumatic system. I am using 12v car tyre inflator as my compressor.But i didn't find any 3ltr to 6ltr standardrd air tank. Can i convert my old 3ltr lpg tank into ...
1
vote
0answers
25 views
Air demand for powder fluidization system
I need a good estimate of the air demand for a system to fluidizde a powder. We a have silo with a 60° cone and a rotary cell feeder attached to the opening in the cone. The powder (fine powdered ...
1
vote
1answer
293 views
How can I connect a silicon hose with 2mm inner diameter to a smaller 1,9mm port
The biggest diameter of my pressure sensor input port has a size of 1.93 mm. The silicon hose which I want to connect with the sensor's port has an inner diameter size of 2.0 mm.
My honeywell ...
0
votes
1answer
2k views
How to uninstall SIMATIC STEP 7-Micro/WIN V4.0.8.06?
I recently installed SIMATIC STEP 7-Micro/WIN V4.0.8.06 but cancelled the installation after some steps.
But the program appears in the control panel and when I try to uninstall it, the error:- "Did ...
1
vote
1answer
376 views
Calculating piston force for pneumatic vs hydraulic
I'm trying to calculate piston force pressures for double acting pistons for pneumatic and hydraulic pressures. I found the following formula for calculating both
$$\text{Force} = \frac{\text{...
1
vote
0answers
28 views
Proper way to power/use a vacuum cylinder?
I'm considering using a vacuum cylinder in my project (like these ones) to lift sheets of cardboard, but being new to mechanical engineering I'm not at all sure what I need to attach to operate one, ...
1
vote
1answer
59 views
Hydraulic Arm - Handbrake
I am researching a system that appears to have a hydraulic arm with some kind of "handbrake" as pictured below:
System Description:
Table that can raise and lock into place
Locking mechanism ...
0
votes
1answer
58 views
Rotary Screw Air Compressor
I have a 50 HP screw compressor that has just began to load and unload within 10 seconds when previously would take between 40 and 60 seconds. Nothing has been added or removed from the system. Any ...
1
vote
1answer
71 views
What material properties matter when selecting a material to withstand a specific pressure (as a sealed tank)?
I want to design a tank to hold liquid propane. The proposed tank would have one inlet valve, one output valve, and no sharp edges. I've read that the pressure required to maintain propane in a liquid ...
1
vote
2answers
90 views
Air flowrate required for testing a pneumatic cylinder?
First time designing with pneumatics here. I want to build a continuous use device (with ~30 back and forth actuation per minute) but do not currently have access to a large compressor.
Is there a ...
2
votes
2answers
129 views
Rules of thumb for sizing an air pump piston?
I am working on a design for a small air pump that uses a single piston.
When choosing a piston I have two parameters diameter and stroke. So, I can make it fatter and shorter, or skinnier and longer,...
1
vote
1answer
60 views
pneumatic solenoid operation?
Any idea on how this type of pneumatic solenoid works? I know that NC is normally closed, NO normally open, but not sure how air flows? Thanks!
2
votes
1answer
1k views
How strict is the direction of air flow in a single direction pneumatic solenoid valve?
I am currently designing a small pneumatic system that pumps air into an airbag, holds the air in, then releases it to the atmosphere. Each pump in the system actually feeds two sets of airbags and ...
3
votes
2answers
206 views
Are precision pneumatics possible?
I've seen some of the robotics competitions use pneumatic actuators for brute force actions ( like a hammer or lift ), but nothing precise. Is it possible to use pneumatics in a more precise scenario?,...
1
vote
2answers
131 views
Axial damper type?
I am trying to find again a small plastic damper that I was looking at last year, but forgot the exact name for that type and now I am unable to find it again. Quite frustrating.
It is pretty much a ...
4
votes
0answers
538 views
Estimating Maximum Speed for a Pneumatic Cylinder
I am designing an machine that is going to use a pneumatic cylinder to accelerate a projectile. I have a tentative cylinder specified, and am working on the control and supply side. I have verified ...
3
votes
2answers
152 views
Do non-linear passive pneumatic throttles exist?
On of the more simple throttles is a channel, which is described by the Hagen-Poiseuille equation:
$$\Delta P = \frac{8\mu L Q}{\pi r^4}$$
This equation, when rearranged, tells us that the Flowrate $Q$...
