- #1
stanley650586031
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- TL;DR Summary
- Suction force weakens as you move your suction source away from the object. I need a method to quantify the relationship between the distance and suction force.
Hi All,
We all have experiences of using vacuum cleaner to clean carpet, floor, etc. and might probably have noticed a super intuitive phenomenon that as you move your vacuum cleaner suction hose closer to the floor, the suction force increases which helps you pull some of large trash off the floor. On the other hand, as you move it away from the flow, the suction force weakens.
The same analogy could be applied to a suction cup and the object you want to lift. Assume there is no gap between the suction cup and the plate, and contact surfaces of both objects are perfectly flat. In that case, the perfect vacuum should be able to be generated within certain time and suction force should reach its maximum value for the given settings. However, as you move the suction cup just SLIGHTLY away from the object, the percentage drops significantly.
I am pretty sure this has to do with the percentage of vacuum generated in that specific volume (diameter of the hose times the distance between the object and the hose). The more air particles you could remove per unit time from that volume, the higher percentage of the vacuum you can generate. However, the tricky part is how would you be able to quantify the relationship between the suction force and suction distance
I have been thinking this question for over a week but still can't find a hint. I was hoping if some of you could give me some inputs or thoughts or resources I could consult with.
Thank you
Stanley
We all have experiences of using vacuum cleaner to clean carpet, floor, etc. and might probably have noticed a super intuitive phenomenon that as you move your vacuum cleaner suction hose closer to the floor, the suction force increases which helps you pull some of large trash off the floor. On the other hand, as you move it away from the flow, the suction force weakens.
The same analogy could be applied to a suction cup and the object you want to lift. Assume there is no gap between the suction cup and the plate, and contact surfaces of both objects are perfectly flat. In that case, the perfect vacuum should be able to be generated within certain time and suction force should reach its maximum value for the given settings. However, as you move the suction cup just SLIGHTLY away from the object, the percentage drops significantly.
I am pretty sure this has to do with the percentage of vacuum generated in that specific volume (diameter of the hose times the distance between the object and the hose). The more air particles you could remove per unit time from that volume, the higher percentage of the vacuum you can generate. However, the tricky part is how would you be able to quantify the relationship between the suction force and suction distance
I have been thinking this question for over a week but still can't find a hint. I was hoping if some of you could give me some inputs or thoughts or resources I could consult with.
Thank you
Stanley