×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Diesel Driven Water Pump with Vacuum Priming System - Centrifugal Clutch Engagement Speed

Diesel Driven Water Pump with Vacuum Priming System - Centrifugal Clutch Engagement Speed

Diesel Driven Water Pump with Vacuum Priming System - Centrifugal Clutch Engagement Speed

(OP)
Hello All,
We are Building a Diesel Engine Driven Water Pump System that includes a Vscuum Priming Kit.
The Unit needs Remote Start/Stop & Telemetry.
We have fitted a Centrifugal Clutch to disengage Water Pump for first 5 minutes so Water Pump can be Primed before engagement.
The Priming is managed via a Vacuum Pump and Catch Tank + Overflow Tsnk.
Our challenge is Diesel Engine Speed for Priming due to limitation of Engagement Speed of the Centrifugal Pump.
We are Absorbing in the order of 45 kW to Supply the Water Pump at Duty [ 2 : 1 Ratio @ Duty - Engine 1800rpm / Pump 900rpm ].
Clutch engagement is Max 1000rpm and working with a Pulley to Operate the Vacuum Pump we can only Run Engine at Max 900 to 950rpm (below engagement of Clutch) and this isn't ideal for the Engine with Vacuum Pump not supplying enough Lift (Suction) ftom the Warerline 8 to 9 Metres to the Water below to Prime Pump.
Question was asked if we could engage Clutch @ 1200rpm or 1300rpm but this is not possible.
We are not keen on increasing Engine Dtive Pulley further to Speed up Vacuum Pump (currently 280mm OD).
Any thoughts on a solution.
Cheers

RE: Diesel Driven Water Pump with Vacuum Priming System - Centrifugal Clutch Engagement Speed

Why are you trying to re-invent the wheel, there are many vacuum primed pumps already on the market, including Australia

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: Diesel Driven Water Pump with Vacuum Priming System - Centrifugal Clutch Engagement Speed

Make the vacuum pump electric driven off the engine alternator?

Make the water pump self priming?

run some more pulleys and add a speed uplift?

We have no idea of space issues or why you don't want to increase the pulley size.

However whatever you do a "suction" lift of 8 to 9 metres is beyond the range of most pumps to do this successfully for a long periods without cavitation damage to the impellor. I would normally limit any long term operation to 7m lift and also hope the water temperature isn't very high...

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close