Insane Hydraulics
Bold and audacious blog about fluid power
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This is directed to hydraulic equipment owners who may venture to overhaul their repairable gear pumps themselves. And I decided to devote a separate post in my mistakes collection to this subject because I just saw another of our clients do a correct overhaul and then send his new pump to scrap simply because he omitted a simple yet very important procedure... So, let's talk about this Repairable Gear Pump Mistake.
I realized that a very important article of mine, in which I promote the "study it before you repair it" attitude to the service of components that a technician is not familiar with (a practice, that is often regarded as a punishable waste of time by the shop management), and use a White Drive orbital motor with its unique "Valve-in-Rotor" design as an example, was lacking the example pictures, which is a major flaw. It's one of my better posts, so I dropped everything to fix it. It's all good now. Here's what you'll learn:
And a lot more. I strongly suggest you read it only if you have spare time because it's definitely one of those posts that you don't want to rush - An Exercise With a White Hydraulics Motor
A hands-on session today for you. A short video, that shows How to Remove the Pulsations Orifice of the Rexroth A10VO(18...100) DFR/DFR1 Controller (when compressed air "is not enough").
Does Sporadic Oil Cleanliness Analysis Make Sense?
Two "Secret Crane Weapons" for "Economical" Simultaneous Operation.
I guess today's blog can be considered as a way of drawing attention to the fact that aside from the common parallel operation, sectional DCVs can also provide the series and tandem operation - Why The Fifth Hole?
Another animated drawing in How to Transform Closed-Center Double-Acting Spools of Monoblock DCVs.
I realized that my post on cavitation, which is one of my most visited articles, does not comply with the https standard, and has quite a few typos and older (direct) image links that make viewing it on mobile devices pretty tedious, to say the least. Since it has links to example pages and an add-on, I had to correct them as well, which makes it 8 pages in total. So, today I present to you the new and corrected:
Cavitation in Hydraulic Systems, and a very important Add-On to the Article on Cavitation in Hydraulic Systems.
And here are the direct links to example pages, in case all you want is see some cool images of cavitation damage:
Rexroth A10VO Pump Valve Plate
Komatsu Pump Cylinder Block
Over-Center Valve Spool
Axial-Piston Pump End Plate
Orbital Motor
Rexroth A6VM Motor Valve Plate
This week I assisted in a breakdown of a Danfoss H1B160 variable displacement motor, and I saw something I always thought was impossible, which is why I feel I must share it - Danfoss H1B160 Hydraulic Motor Gets Locked But Not Shattered!
Orbital Steering Valves With Static Load Sensing.
The story with the RMF filtering cart from last week is not over. I've used the cart on big jobs (4000-liter-tank big), with similar results - and I'll write a post on this experience soon (hopefully), but I was contacted by RMF with some questions/suggestions, and since I do enjoy getting to the bottom of technical issues that I come across, I need to come up with a "bullet-proof" test of the particle counter, so that I and the nice people from RMF have a solid foundation for our discussion. This is great, by the way, all I need is some time (an easy thing to say...). I'll have to find a way, I guess. In any case, stay tuned for the updates - you always learn much more from the things that don't go right, don't you? On another note - I've been doing some "housekeeping" on the blog, and, unfortunately, I still have quite a few articles in the old format (and quite a few that aren't "https", and therefore are less visible on the web). Doing my best to slowly bring everything up to standard! So here's another older post that's "all good" now (a least from the search engine's point of view) - A Couple of Tips on Drilling Small Diameter Orifices.
A Relatively Advanced Filter Cart - My First Impressions
How Much of a Difference Can Three Hundredths of a mm Make?
A couple of hydraulic safety tips in Another Way You Can Hurt Yourself Around Hydraulic Equipment.
For the last couple of weeks we've been looking into non-reaction steering valves, so let's explore now How a Reaction Orbital Steering Valve Works.
The post on the orbital motors is complete now. I tweaked the code and added a toggle switch to the interactive drawing - this gives a unique perspective to the orbital motor operation, do "take it for a spin". Please note that since the link to the page is the same, your browser may use a cached version, so make sure you hit that refresh button if you see the same page you saw last week - Orbital Hydraulic Motor Principle Explained.
I sat down today to write an article about the orbital motor principle, or better - about the best way to learn it "for good" - which is designing it yourself. And I thought to myself - wouldn't it be great if I came up with a nice animated illustration? How hard can it be? A couple of Javascript lines to animate an SVG... No biggie! I thought that a couple of hours that I usually have at the end of the day to write my customary Sunday post would be more than enough - but the animation took a bit more "typing" than I thought it would. I am presenting it today because I think that it looks very cool, and illustrates the orbital principle perfectly as it is, but please note that the page will be expanded with the respective article next week.
A Non-Reaction Orbital Steering Valve With... Reaction?!! - Part 2
A Non-Reaction Orbital Steering Valve With... Reaction?!!
Determining the Best Radial Shaft Load Direction for Axial Piston Pumps.
Troubleshooting A Cylinder That is Both Pneumatic and Hydraulic at the Same Time.
Happy New Year to everyone! Life is short. Dream big and make the most of 2023! I know I will. And as for today's post - I present to you my (once again, completely biased) Thoughts on Applications of Helical Rotary Actuators.
Merry Christmas to everyone! Today I am solving a (scary) case of an oscillating closed-loop transmission, and sharing a list of other things I had to do in my practice to slove "self-oscillating hydraulic stuff" - An Oscillating Closed Loop Transmission (and More)
Three Relief-Valve-Related Tips. (Inlcudes an unsafe tip, that can only be used by skilled and experienced techs, and an example of surprisingly efficient "redneck engineering").