Talk:Hydraulic machinery

Definition

A Hydraulic system is a series of pipes for hydraulics, such as you might find in a city. -Protopro— Preceding unsigned comment added by 81.78.96.45 (talk) 00:00, 22 March 2006 (UTC)

Dead Links

I have removed several links to non-existent articles with (hydraulic) in the title which may have been deleted? I have taken several small bites, in case these are in prep somewhere, so they can be undone piecemeal Timpo (talk) 13:40, 12 July 2010 (UTC)

Image

Maybe usefull image? --Snek01 23:30, 4 July 2006 (UTC)

There is also a page Hydraulics in Wikipedia. Maybe somebody can bring hydraulic, hydraulics and hydraulic machinery together. Jeff

"Hydraulics" is often refered to as water hydraulics. It might be useful to separate this and the water-hydraulics used long time ago from oil-hydraulics that is used in hydraulic machinery. Perhaps there is a special name for hydraulics involving water. I have an old book called 'Handbook of Applied Hydraulics' by MacGrawhill, Inc. 1969, nothing is mensioned about oil.

The image you show is too far away. A closer photo might be useful. Caterpillar have an Image gallery for the press but they don´t approve to use it if it's not used in an article about CAT. Cat must put it into Wikipedia themselves. Lidingo SWE (talk) 14:59, 21 October 2008 (UTC)

Present layout

There is more to come on the hydraulic system/machinery article. Maybe this article should be divided into 3 parts; (1) Basic hydraulics, (2) System layout and (3) Basic calculations. Hydraulic systems have become more and more important in the mobile machinery as well as the importance to reduce power losses by using new system design features. The problem is to cover this in a dictionary such as Wikipedia, but never the less, hydraulics is an important technical area and should be covered somehow. /Lidingo SWE, 15th jan. 2007

sounds good, I like the idea of a Basic calculations section in particular. Also, Lidingo, you can automatically add your signature to talk page posts with four tildas (~~~~). --Duk 17:15, 15 January 2007 (UTC)

// "Rating" refers to max. technical data as I know ?? See changes in the article Lidingo SWE 18:18, 15 January 2007 (UTC)

There should be a complete new set of contributions starting under the general title "drive systems": Mechanical drive systems, electrical drive systems, hydraulic drive systems and pneumatic drive systems. But this is a lot of work. Hydraulic machinery is not a good title for hydraulics. This however costs a lot of time and effort. A great dusadvantage is the fact that images are very rare at Wikipedia and it is very difficult to get pictures accepted by "the board" here. Maybe somebody can easily get some pictures of components etc? Jeff 17:28, 10 February 2007 (UTC)

Open center circuits and closed center circuits

I worked 35 years in hydraulics, but I never heard these words. I know open and closed loop systems, but I think open center and close center come from a schoolbook. I never heard them. Can anybody explain to me where it comes from, before I edit the main page? Jamclaassen 14:55, 27 January 2007 (UTC)

It might differ between US and Europe. Anyway, Open center/Closed center refer to the valves connected to the pump. Today most of the high power hydraulics have closed center valve type, where the pumpflow is blocked when valve spool is in neutral. When LS-valves are used combined with fixed displacement pumps, a special valve is incorporated in the inlet section of the the valveblock to unload the pump, making the system work as an "open center" but the valves are still closed centers in neutral. Lidingo SWE (talk) 14:24, 21 October 2008 (UTC)

Sorry

I donot know how its waste work came in the article, it was not written on purpose Jeff 17:28, 10 February 2007 (UTC)

New article "Hydraulic drive system"

Under the article hydraulics I made a new chapter "Hydraulic drive system". If we make a new article with this name we can describe hydraulics in this new article better than in hydraulic machinery. Write it step by step and delete nonsens as issometimes written here. Who is able and willing to do this or want to assist me?Jeff 12:42, 28 February 2007 (UTC)

• Looks like that was eventually done (Hydraulic drive system) but nobody bothered to note it here. --Treekids (talk) 17:08, 22 April 2008 (UTC)

Efficiency & subjectivity

"Gear pump: cheap, durable, simple. Less efficient," ... than what? Let's get an objective factual table in here, people! --Treekids (talk) 17:06, 22 April 2008 (UTC)

Compared to axial piston units with fixed displacement. Axial units have much higher efficiency, is much more expensive to produce but lasts much longer. However, a table showing efficiencies depending on type of unit is a good idea. Most manufacturers have these datas in their general information materials about hydraulics. I have some datas but I don't think it is up to date. Lidingo SWE (talk) 14:14, 21 October 2008 (UTC)

Fun Fact

This isn't really a constructive comment, but I found this mildly hilarious. This article is cited as a reference in my fluid mechanics textbook (p. 62, Engineering Fluid Mechanics, Crowe et. al., Ninth Edition) for which I paid about 180 bucks. Bendhoward (talk) 04:47, 21 October 2008 (UTC)

The best education material about hydraulics you can get without charge from Bosch-Rexroth or from Eaton Hydraulics/Vickers. Sauer-Sundstrand also have good documentation, i particular about hydrostatic closed loop transmissions. Hydrostatics today for mobile machinery however is very much related to the electronic control programs involved. No really good official documentation exists about how to design the programs as this information is a vital part of the companies topsecret know-how and it differs for each type of machine. Lidingo SWE (talk) 14:37, 21 October 2008 (UTC)

Merge of hydraulic manifold

• Oppose The only reason I can see for a merge is the poor current quality of hydraulic manifold. That's not a good reason for a merge. If the quality is a problem, it's not improved by merging. If the topic isn't notable, it's a deletion not a merge. I don't see that the (very broad scoped) hydraulic machinery article would be improved by any such merge. Nor is this article in a much better state. Andy Dingley (talk) 17:41, 28 September 2019 (UTC)

• Comment We seem to have a lot of articles that begin with the word "hydraulic". Surely some of these can be merged into others. I myself looked at this article and thought, "Couldn't this be merged into something else?" before I even knew there was a merge discussion on the table! So while I might not support a merge of "hydraulic manifold" into this article, I would almost certainly support an analogous move of other hydraulic-related articles into other, broader hydraulic articles. It is important that we keep information centralized, and a hundred articles on hydraulics does not do anyone any good! A loose necktie (talk) 04:54, 18 December 2019 (UTC)

• Merge anything and everything, just because the names overlap? What we really need here is better article content being written, and merging away articles is a great discouragement to anyone bothering to do that. Andy Dingley (talk) 10:46, 18 December 2019 (UTC)