One time we were filling the loader's hydraulic tank because it's from the '60s and about as watertight as a screen door, and dad raised the bucket while I was filling it to help get the air out of the system. It was when he lowered the bucket that I learned that the loader needed about 3 of the 4.5 gallons I had put in it as the remainder flew out the 2" wide fill port. I reflexively put my hand over the flow, which turned it into a hydraulic oil sprinkler. I threw out that jacket, but hot damn was my hair shiny and smooth.
If you top it out on a cold day, warm it up some first, or do it in two operations. The amount of heat expansion, after you have filled it cold, may earn you an oil soak when things have warmed to operating temperature. I found that out the hard way.
hey AvE -- i just wanna say thank you for all of your content. i am going through a really tough time in my life. and your channel makes me forget about the bs and have a chuckle. i wish i was more like you. thanks for reminding me to take'r'easy.
Alex Goresch my advice would be to just be yourself, just the marvel super hero version of you, maybe play with your drone less and you’r girl more. Couldn’t hurt.
Alex Goresch you’re a good person however you are compared to Uncle Bumblefuck or not. Keep yourself going mate, life will always get better either sooner or later. You’ll come out the other side of whatever your current troubles are a better man, whether it currently feels like it or not.
Would be something if AVE did a tear down on an Automatic transmission and valve body. Would love to see him nerding out on how it works/ the chinsiness of certain items.
You speak volumes about the raw force of a hydraulic circuit but didn't mention they can be hyper accurate. We have some transfer machines that use hydraulic quills; with high speed volumetric sensors and optical linear scales they will drill, bore and tap holes to .0006".
Couldn't help but notice the "old" Craftsman" 3/4 wrench on your bench. Brought me back to my teenage years working in a Honda/Yamaha shop and using the metric versions. They made quality stuff back then.
This my favorite type of AvE content. It's likely I'll never work with this type of equipment, but learning about the underlying concepts of both the mechanical and economic end of it is always a nice bit of knowledge.
You should write a book! I'm sure you have so many stories from working in mines and on oil rigs etc. With your characteristic humor I think it would be a really fun read! You could publish it online straight to amazon (no publisher required), I would definitely buy it!
I have a lot of respect for hydraulic systems. Was washing sand ( for use in concrete and road base) almost 30 year ago, got my arm pulled into the conveyor belt as it was going around the bottom drum. Was stuck there ( working alone) for a good 10 mins, stopped belt but the other hyd motor on the system ( was the shaker on a vibrating screen) was going twice as fast, eventually I fell back minus an arm. Ran to the car to call for help, luckily I had a mobile phone which was fairly rare back then.
All of our systems (4+ pumps, 4,000psi+) have side stream pumps which filter the shmoo and run it thought a heat exchanger. Also fun side fact: Even "non flammable" hydraulic fluid will most definitely combust and sustain one hell of a flame when atomized and presented 3,000+ degree molten iron. When a little leak turns into a very long night. Oh and, Rexroth for the win.
Hydraulics are fun. Back in another life, I maintained systems that worked off the Askania Regulator scheme. You could take fractional variations in furnace atmosphere pressure and move a 3 ton damper in response. All you needed was a hydraulic pump. This was back in the day of clamp-galvanometer temperature recorders/controllers. No electronics there either.
Last time I was this early she got pregnant... BTW really enjoying the videos... especially the way you interact with your wee one, she is precious and its awesome..
You, Camerata and ec have taught me more in the last year than I learned in 12 years of public school. A couple of vids from you three when I come in for the evening instead of tv and I go to bed smarter than I was when I woke up. Thank you.
I love oil powered things. My Bobcat is a great example of what you are conversing about. It has about 40 hp in the diesel that only drives a big ol oil pump, the moving oil then goes to oil motors and cylinders and gets a whole lot of work done from a smallish prime mover. LOVE oil powered stuff!
Great video! I did a repair on a medical air pressure pump similar to this. Only difference is that this pump had carbon vanes. The vanes choudered themselves to death. But I fixed it all and got it back ckooching in no time! Thx for all of your vidjeyos!
I always enjoy your videos and tell my friends about them.( I just tell them with my mouth, though, cause' I don't know which way I need to face to book 'em or send them a Twat or whatever that bird thing is) I took a 2 week training course at the Vickers Hydraulic School and would like to share some things that I was taught there that differ from what you have learned in your own personal experience. That variable pump design is one of the first and doesn't meet the needs of most industrial users any longer. They are very heavy for what they do, weighing almost 180 pounds for a 20 GPM version, if I recall correctly. They are also limited to a max pressure of 1000 psi. That is because it is an unbalanced pump design. Being made from two circles running eccentric to one another, the pressure is always going to be on only one side of the rotor when it is performing work and that exerts a side load on the rotor's axle and its bearings, requiring those parts to be massive at pressures higher than 1000 psi. The Racine company made these pumps and in the larger sizes it was even necessary to add a set of rollers for the outer cam ring to slide on because of its mass in their largest pumps, which are a measly 30 GPM. All designs of vane pumps and motors that we studied had hardened, lapped steel vanes. I have had hundreds of pumps apart and have never seen a resin based material used for the vanes. I see them all the time in pneumatic motors and don't really see how they could withstand the forces generated in a hydraulic system. The intravane that you spoke off is used in "balanced" vane pump designs where the cam ring is elliptical and allows the pressure to build on opposite sides of the rotor, simultaneously, thereby offsetting or "balancing" the load on the axle and its bearings and enabling pressures up to 3000 psi. If that much pressure were applied to the entire vane bottom it would create so much force at the vane tip that the vane and cam ring would both be damaged, so it is only applied to about a third of the surface via the intravane. We were taught that vane pumps only require a light film of oil on the inside to protect them in storage and that they should be jogged several times when starting. The vanes will be slung out of their slots and into contact with the cam ring at approximately 600 rpm and pumping begins at that point. Of course hydraulic vane motors have springs holding the vanes in initial contact to get them spinning, with pressurized oil taking over as the workload increases. Since you are fond of acronyms, I wanted you to know that at the Vickers school the condition that you describe at about 3:40 in your vagao is officially and repeatedly referred to as PSO, as in Pressure Squirting Out. Apparently it's OK to mistakenly believe that pumps pump pressure if you find yourself suddenly dealing with that shit! As much as you seem to know about so many technical subjects ( and women ) I have to assume that you have built a reference library along the way. I can recommend the Vickers( now Eaton) text book that they use in their school, if you are ever in need of more hydraulic reference material. The last edition (5th) can be had for about $35 and the newest for about $85. Keep your youknowwhat in a whatchamacallit.
I have rebuilt only 10s of vickers vane pumps and maintained as many systems with these great pumps. They seam to last forever if treated right. The one thing they don’t tolerate is a restricted inlet. They are easy to rebuild , but seldom need it if they are treated right.
I love these pump videos. As a chemical enginerd, is great to understand what's going on inside so I know why I should spec one vs another. To many, it seems like rotating equipment is just a black box of (fluid conditions in) + energy = (desired fluid conditions out)
Nice video! It's interesting to see you cover a style of pump I'm actually familiar with for once! I've worked with the Bosch A10VSO series 31 for years and it's quite the pump to say the least.
Same style of pump is used in many automotive transmissions. They do provide a lot more flow than a gear rotor pump. The springs on the cam rings are a good bit smaller since they only work up to about 200 PSI. But they are not as reliable if something goes wrong.
I'm doing power stealing pumps in my ast level 1 right now, cool to see another type of pumps on the list, cool to see the video and a real world everyday application, not something most people can see or teach
The 200R4/700R4 definitely used this style pump variable displacement included. The 4L80E uses a gear type pump and I believe the TH-350 does too. That said, not sure on any of the other stuff but a cursory look at a 6L80E says it uses that pump too. Maybe "most every" was an over broadening of terms but they're certainly not a rare pump in automotive stuff.
If you had a pump that wasn't VD you could easily end up with a bunch of power loss as he mentioned. Electric steering assist is IMO in part due to the desire to implement electric cars.
I suspect Williams had a high quality aluminum hydraulic pump in their F1 car when that was allowed but I also suspect it was only built to last the weekend.
Good vid. Thanks! Reminded me of when I took a vacuum pump apart and couldn't get it back together again! About 20 yrs ago when I was a youngling about 23 I was a newby maintenance guy at a hospital and one of our vacuum pumps needed new vanes, it was about 4x the size of the oil pump you showed, so we really easy to see and work on. I took it apart and got the new vanes and never finished putting it back together. It was the twin in a paired backup set, but I wonder if anyone ever got it put back together? I wish I could remember what the problem was getting it out back together, something to do with the vanes I think.
FWIW, the 5"/54 caliber MK42 naval gun system that I spent my entire time in the Navy working on had its train & elevation powered by a piston pump, yes with what we called a tilt plate to control the rate of hydraulic fluid flow. The part of the gun powered by that weighed over 50 tons. The gun was actually driven to be aimed by hydraulics, and yes, it was servo controlled. We could hit a target the size of a car at 15 miles. ;)
Our hydraulic shovel motto: “A lil dirt won’t hurt” 75 Canadian pesos is pretty good, we replaced a more Teutonic gear pump slightly larger than that one worth about 100x more
I’m a mass surface finisher and one of my main contracts is deburring in a vibratory finishing machine the little circular part the vanes sit in. The part I finish is for use in transmissions, though.
We're doing process control in my industrial automation course in college and this is the kind of shit I like getting into. Learning how this shit works to very interesting
Look at those knipex pliers, fuckin mint! My dads got a pair for snow plowing, every season he says “don’t lose my pliers, those are 30 years old” or “those pliers are older than you” xD
Great video. Really been getting into hydraulics lately because of you was wondering if you'd ever consider making vijeo on like the basics of it would love to here you explain it in the way you do lol
Interesting explanation on the feedback system for self-regulation. In theory should be do-able with the other style pump though. (A portion of the relief could go through a passage and a piston that pushes back on the tilt block.) Some of those with tilt blocks are reversible (depending on which side of the piston being driven that you want the fluid to go to), so getting it to zero on the sweep might be trickier to pull off. Everything has its trade-offs and cost, but I'd suspect if it's useful enough, at least one version of it is out there.
Love vane pumps. Can really put them through hell and the only thing your likely to damage on them are the teeth on the input shaft. The one in the transmission of a car will handle insane amounts of torque without any trouble at all. Crazy part, the one in a car's transmission is small compared to this one, about the size of a hockey puck sliced to half of regulation thickness.
As a mechanic I think it’s interesting that we see all these pump types in cars and light trucks used in very specific applications. Gear pumps for engine oil, cane pumps for automatic transmissions and piston pumps for AC systems. Sometimes you see one where you don’t expect but the applications are pretty standard at this point.
So, if i'm getting this right, the gear pump + blow-off valve works, but it's dumb because the blow-off valve like a short-circuit will create so much heat it'll just vaporise the oil. But the vane pump will sense the pressure it produces and lower it's pressure if it gets too high, keeping the pressure in a kind of safe range? Pretty cool!
Knowing the direction is easy. Usually it rotates away from the inlet port for a pump like this. You can also put some hydraulic in the inlet and turn shaft in one direction. If it comes out from the outlet, you are on the right path.
I believe the operating temperature of hydraulic fluid/oil is around 135°F and for every 10 degrees above it's operating temp it's fluid life is cut in half.
Coming home after work on a Friday, pouring a rum and kicking back to your videos is worth a “working late” to the girlfriend. Watcher for years, first comment
There may be an adjustment stop as well. And I would think the pressure compensator has a handle to adjust the system pressure by increasing/decreasing the spring tension.
