Tag: OG

Double Dare, Double Dragon, Double Mint Gum

Published on by Brian FarnoLeave a comment
1 -Classic Double Dragon Arcade Game from 1987! Spike & Hammer Save The World – This is the game I used to dump quarters in every visit to the mall.

It’s no secret, I’m a kid of the 80s. If you remember any of the three items in the title of this blog, then we may be able to be friends still, and I want to ask a question. How’s your sourdough starter doing? Okay, you got me, the blog isn’t going to be about sourdough, or one of my favorite TV shows from growing up, or the video game I always threw quarters into when we were allowed to spend some money at an arcade, but it’s going to be about Double Acting Reciprocating Air Compressors.

You may have heard from us about the many types of compressors before, and we would just like to make sure we have shared a few different viewpoints on these topics. The double acting compressor is a piston action compressor. Unlike the single action compressor, these will actually build pressure above and below the piston for each rise and fall, rather than just the rise. Because this generates twice as much air, these are generally found in larger sizes than the single acting compressors. This also means the compressor is constantly pushing a load out of the system whenever the motor is turning. While they do put more volume out and work with both directions of the piston, they have been found to only be around 32% more efficient than their single acting counterpart. Nonetheless, they are available in sizes that can supply an entire manufacturing facility and can be used efficiently when placed into a system that is designed correctly.

If you want to learn about more types of compressors, need help with your Konami cheat code, or what to discuss a point of use compressed air application, give us a call, chat, or email.

Brian Farno, MBA – CCASS
National Business Development Manager

BrianFarno@EXAIR.com
@EXAIR_BF

1 – Classic Double Dragon Arcade Game from 1987! Spike & Hammer Save The World – Joe’s Classic Video Games – retrieved from – https://www.youtube.com/watch?v=_SqYOHpUiDM

Carburetors and Venturi Tubes: Thank You Giovanni Battista Venturi

Published on by Brian FarnoLeave a comment

I know it has been a little while since I blogged about something with a motor so it should be no surprise that this one ties to something with a combustion chamber. This all starts with an Italian physicist, Giovanni Battista Venturi. His career was as a historian of science and a professor at the University of Modena. He gave Leonardo da Vinci’s creations a different perspective by crediting da Vinci to be a scientist with many of his creations rather than just an amazing artist. He then began to study fluid flow through tubes. This study became known as the Venturi Tube. The first patents in 1888 came to fruition long after Giovanni passed away. So what was this Venturi effect and how does it tie in to carburetors let alone compressed air?

The illustration below showcases the Venturi effect of a fluid within a pipe that has a constriction. The principle states that a fluid’s velocity must increase as it passes through a constricted pipe. As this occurs, the velocity increases while the static pressure decreases. The pressure drop that accompanies the increase in velocity is fundamental to the laws of physics. This is another principle we like to discuss known as Bernoulli’s principle.

1 – Venturi

Some of the first patents using Venturi’s began to appear in 1888. One of the key inventors for this was Karl Benz who founded Mercedes. This is how the Venturi principle ties into combustion engines for those that do not know the history. This patent is one of many that came out referencing the Venturi principle and carburetors. The carburetors can vary considerably in the complexity of their design. Many of the units all have a pipe that narrows in the center and expands back out, thus causing the pressure to fall and the velocity to increase. Yes, I just described a Venturi, this effect is what causes the fuel to be drawn into the carburetor. The higher velocity on the input (due to this narrowing restriction) results in higher volumes of fuel which results in higher engine rpms. The image below showcases Benz’s first patent using the Venturi.

2 – Venturi Patent

While carburetors slowly disappear and now can mainly be found in small engines such as weed eaters, lawn mowers, and leaf blowers, the Venturi principle continues to be found in industry and other items. Needless to say, I think Giovanni Battista Venturi would be proud of his findings and understanding how monumental they have been for technological advancements. For this, we will recognize the upcoming day of his passing 199 years ago on April 24, 1822.

Brian Farno
Application Engineer
BrianFarno@exair.com
@EXAIR_BF

1 – Thierry Dugnolle, CC0, Venturi.gif, retrieved via Wikimedia Commons https://upload.wikimedia.org/wikipedia/commons/1/16/Venturi.gif

2 – United States Patent and Trademark Office – Benz, Karl, Carburetor – Retrieved from https://pdfpiw.uspto.gov/.piw?Docid=00382585&homeurl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO1%2526Sect2%3DHITOFF%2526d%3DPALL%2526p%3D1%2526u%3D%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%2526r%3D1%2526f%3DG%2526l%3D50%2526s1%3D0382,585.PN.%2526OS%3DPN%2F0382,585%2526RS%3DPN%2F0382,585&PageNum=&Rtype=&SectionNum=&idkey=NONE&Input=View+first+page