How does a water fountain pump work?
Fountain Pumps. The pump is the unseen heart of your fountain. Submerged in the reservoir, the pump draws water into its housing, where an impeller (a water propeller spun by electricity) forces the water out through the pump's outflow fitting.
source: fountainfinder.com/fountain_pumps.htm
4diac task idea using Stepwise refinement
Task 1: Student builds own water pump and test as a fountain- Simple to build out of Lego parts in 1/2 hour or less as shown in short videos. Student can also pick how to build their impeller from examples or own ideas.
- Any motor can be used, so will work for Raspberry Pi or any HW supporting a motor.
Task 2: Water goes into another container then...
- measure height of water left to know when to stop
- measure of water in new container to know when to stop
- measure water rate of flow based on water delivered in specific time (or via water height)
Task 3: Student ideas for different flow rates and start and stop when ???
Construction
Coming screen shots from videos to help with my first water pump construction try.
- All examples used Lego motors and Technic parts, but no Lego EV3 nor programming.
- No standardized task description or construction was found.
12/9/17 Simple pump working (repeatable and have videos to chose to post) BUT would like a stronger pump that pumps higher. Easier to put in an larger student project scenario.
1/4/18 update... Will try with a medium power fn motor just got since using EV3 motor it was hard to get enough power to pump the water very high. Will try MattD600 video model and instructions next. Didn't have parts for the propeller nor same kind of motor until now.
1/4/18 update... Will try with a medium power fn motor just got since using EV3 motor it was hard to get enough power to pump the water very high. Will try MattD600 video model and instructions next. Didn't have parts for the propeller nor same kind of motor until now.
Video Examples
- All examples used Lego motors and Technic parts
- None use Lego EV3 nor any programming.
- Motor on top parallel to top of fountain
- Water intake usually on bottom
- So need small legs so water get underneath
- Pipes are narrow (1-2 dots wide) to help force the water up
Lego (Technic) Water Pump Building Instructions
Lego (Technic) Water Pump - MOC
Working Lego Centrifugal Water Pump (with instructions) [MattD600] Has parts and most detailed instructions. Explains how pump works well.
[1/4/18] Now have some parts needed for propeller didn't have before and can try flipping the physical motor set switch in application.
[1/4/18] Now have some parts needed for propeller didn't have before and can try flipping the physical motor set switch in application.
Lego water pump tutorial ...
- Motor mounts on top are very clear
- Curved impeller housing
- Bit chaotic as he forgot how he built it.
- Design simple but good
- impeller and housing are simple, but effective design
- Explains details like when weighting is needed
- Different motor connection to impeller
- Strong simple impeller with more than 3 blades
- Note: His faster v3 impeller has 3 blades.
- Very strong water flow
- Less leakage if long solid pieces on side
- Shows building pipe in detail
- Another impeller idea
- Complete building instructions
No comments:
Post a Comment