Previous in Forum: Turbine Ramping   Next in Forum: Megawatt-Scale Synchronous Belts: Has It Been Done?
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
13 comments
Rate Comments: Nested
MariaF
Member

Join Date: Oct 2009
Posts: 6

Telescopic Cylinder (Double Acting)

04/15/2010 3:20 PM

Hello Ladies and Gentlemen,

I am trying to figure out how a double acting telescoping cylinder works. Can anyone point me in the right direction where there is a diagram?

Maria.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
Doorman
Guru
Hobbies - DIY Welding - Don't Know What Made The Old Title Attractive... Popular Science - Weaponology - New Member United States - US - Statue of Liberty - 60 Year Member

Join Date: Apr 2009
Location: Yellowstone Valley, in Big Sky Country
Posts: 7425
Good Answers: 295
#1

Re: Telescopic Cylinder (Double Acting)

04/15/2010 3:28 PM

A double acting telescopic cylinder is capable of powered extension, as well as powered retraction.

A general description of the operation of these can be found at a very popular place, Wikipedia. Here http://en.wikipedia.org/wiki/Telescopic_cylinder is a link to the appropriate article.

Have some fun!

__________________
 Semper Ubi Sub Ubi
Register to Reply
Doorman
Guru
Hobbies - DIY Welding - Don't Know What Made The Old Title Attractive... Popular Science - Weaponology - New Member United States - US - Statue of Liberty - 60 Year Member

Join Date: Apr 2009
Location: Yellowstone Valley, in Big Sky Country
Posts: 7425
Good Answers: 295
#2

Re: Telescopic Cylinder (Double Acting)

04/15/2010 4:43 PM

Ah, MariaF, I discover you are not really a newby to hydraulics! Please excuse the simplified offering in my #1.

Diagram?

Is this more like what you are after?

I am still trying to figure out if you are a student? Would you clear this up for me?

__________________
 Semper Ubi Sub Ubi
Register to Reply
Anonymous Poster
#4
In reply to #2

Re: Telescopic Cylinder (Double Acting)

04/15/2010 8:23 PM

You cad!
Register to Reply Off Topic (Score 5)
MariaF
Member

Join Date: Oct 2009
Posts: 6
#6
In reply to #2

Re: Telescopic Cylinder (Double Acting)

04/16/2010 11:06 AM

Hello Doorman, Just updated my profile which may answer your question.
Register to Reply
peterg7lyq
Guru

Join Date: Jan 2010
Posts: 2446
Good Answers: 60
#3

Re: Telescopic Cylinder (Double Acting)

04/15/2010 5:44 PM

nice animations in this

http://en.wikipedia.org/wiki/Pneumatic_cylinder

http://www.yesyen.com/Product_Hydraulics_YESYEN.htm
Register to Reply
MariaF
Member

Join Date: Oct 2009
Posts: 6
#5

Re: Telescopic Cylinder (Double Acting)

04/16/2010 10:55 AM

Hello Doorman, Thank you for the CAD diagram of the telescopic cylinder internal layout. If you notice on the design the ports are located on the smallest stage (ie. rod). The problem that I am having is I cannot put the porting on the smallest stage (rod) but on the barrel of the cylinder (input and output for double acting), which makes it complicated. I have taught of using a double barrel design for the 2nd stage with a passage way for oil to escape, I am in the process of laying it out to see if that would work. Has anyone came across this problem before, it is only a 2 stage telecylinder?

Maria
Register to Reply
peterg7lyq
Guru

Join Date: Jan 2010
Posts: 2446
Good Answers: 60
#7
In reply to #5

Re: Telescopic Cylinder (Double Acting)

04/16/2010 11:13 AM

so she is a girlie engineer with brains nice one
Register to Reply
5
nick name
Guru

Join Date: Mar 2007
Location: City of Light
Posts: 3943
Good Answers: 183
#8

Re: Telescopic Cylinder (Double Acting)

04/16/2010 1:00 PM

Here is a solution used with success many years ago for the controlled lifting and lowering of a drilling rig.

I made only a principle sketch since I am sure you can complete the details but if you need any information more please do not hesitate.

In fact the original solution was a 3 stages due to the high required ratio between extended and retracted length.
Register to Reply Good Answer (Score 5)
No more Good Answers.
MariaF
Member

Join Date: Oct 2009
Posts: 6
#9
In reply to #8

Re: Telescopic Cylinder (Double Acting)

04/16/2010 1:40 PM

Excellent, the double barrel design I was refering to earlier. Thank you nick name that method would work for me, very good.

Maria
Register to Reply
Doorman
Guru
Hobbies - DIY Welding - Don't Know What Made The Old Title Attractive... Popular Science - Weaponology - New Member United States - US - Statue of Liberty - 60 Year Member

Join Date: Apr 2009
Location: Yellowstone Valley, in Big Sky Country
Posts: 7425
Good Answers: 295
#10
In reply to #8

Re: Telescopic Cylinder (Double Acting)

04/16/2010 1:46 PM

Nice shootin', nick name!

As is the custom around here, I am hitting the 'Rate' button on the bottom left corner of your post, and award you a 'Good Answer', because you have offered the correct solution to the poster!

Nicely done!

__________________
 Semper Ubi Sub Ubi
Register to Reply
peterg7lyq
Guru

Join Date: Jan 2010
Posts: 2446
Good Answers: 60
#11
In reply to #10

Re: Telescopic Cylinder (Double Acting)

04/16/2010 1:55 PM

ditto re rating nice one
Register to Reply
Javaad
Participant

Join Date: Sep 2012
Posts: 1
#12
In reply to #8

Re: Telescopic Cylinder (Double Acting)

09/20/2012 2:25 PM

Hi nick name, the design you for the telescopic double action cylinder could the same arrangement be used to create a pump instead for compressing air by hand?
Register to Reply
MISTKR
Participant

Join Date: Feb 2014
Posts: 1
#13
In reply to #8

Re: Telescopic Cylinder (Double Acting)

02/28/2014 7:00 PM

Do you have a drawing of this double acting telescoping cylinder when it is extended showing how the air flow would retract the cylinder and what sequence?

Thank you,

MISTKR
Register to Reply
Register to Reply
Have a Different Question?
13 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); Doorman (3); Javaad (1); MariaF (3); MISTKR (1); nick name (1); peterg7lyq (3)

Previous in Forum: Turbine Ramping   Next in Forum: Megawatt-Scale Synchronous Belts: Has It Been Done?

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (63 right now)
Show Members
Advertisement