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Looks like a vane pump. The vanes are probably extended by centrifugal force as it spins and scoop air and compress it as they rotate off-centre to the cavity.
Its a two stage vane pump. Google has all kinds of animations on how they work. But yeah, that basically it. The things that sling out are the vanes. They spin around and create a difference of pressure as they spin from the wider area to the narrower area. The oil helps seal everything up to allow lower vaccum to be achieved. It also lubricates but main function is sealing.
You are not alone. I never knew what was inside or what the individual pieces did inside. Thank you for the show and tell. Lolol. Nice video. Will see you on your next one.
Thank you! I learned something today. I have an old JB pump that I took out of service few years back. It was pumping, but making noises. Probably one of the vanes. It’s been sitting under my workbench ever since. I’ll se if I can get the cartridge for it and swap it. Would be nice to have a spare pump.
dual stage, wet vane pump. Those" scoops" are called vanes. If the motor runs, and all vanes are in good shape, the next piece that would fail is the reeds. Im not a pump mguy either, but Used to help build dry vane pumps and have used them in my lab many years. Break about one a year...until I bought an Edwards pump. Its industrial grade and worth rebuilding. Most are throw away junk these days. Nice video. Had I never done a teardown this would have been very helpful.
It looks to me like that is a 2-stage vacuum pump. There are 2 pumping rotors with vanes, each one in a separate compartment. The exhaust from one compartment is the intake for the second compartment. That’s also why there are 2 reed valves. It looks like 1 of the rotors is thicker than the other. I don’t know sure which comes first? I recently bought a similar 2-stage vacuum pump at Harbor Freight. Everyday price was $139 but they gave me some discounts so it wound up costing < $100 and it works great.
I really enjoyed your video and I think that your explanation of the way those metal shafts work on the rotor for squeezing out air is spot on! I am wondering if what spares are available for that pump (realize your intention was to disassemble to learn) to get it working again. Those 2 metal flaps would be one--would the metal plates on the rotor be the other--it seems that eventually the edges would wear down. The motor seems to be good.
Thanks for taking the time to tear one of these down. Sorry you had to destroy the small retainer. Curious to know if you ever put it back together and figured out the puzzle pcs.
@@samename3926 Check the plastic flexible link that connects the motor to the pump underneath. It might be stripped out like mine was. 13.00 part. My pump was running but no vacuum. Apparently these linkages are designed to break to save the more expensive parts from damage. Also, change your oil with fresh stuff.
Im a professional vacuum pump tech. That plate is a splash plate that prevents the valves from splashing oil from where it shouldnt go. Those arent reeds, they're exhaust valves.
Reed valves. They sound like reeds, they quack like reeds, so they're reeds. Listen to the banter and you'll concur on such colloquial nomenclature. The part isn't sold separately on the cheap ones. Cutting your own with appropriate sheet might be doable. Not sealing tight reduces effectiveness obviously.
Nope I do not know any more than you! Nice to see what's inside. Thank you was interesting. They probably make a repair kit, but unless know how to mic up for clearances to know what has to be replaced. Cheaper to buy a new one? Good job!
Get a cap from the oil can and fill it, then run the pump and carefully suck the oil and air through the inlet to the pump where you gauge line goes. Doesn't really need doing unless the pump is contaminated. Also, if its really dirty, put fresh oil in and run it until warm and change it again, repeat until you are happy and the oil comes out clean.
@@curioushvacguy6876 that's how everyone learns! well, except the college sheeple that think their degree makes them perfect, they tend to learn when fired or dead :)))
