Fluid pum name

swash plate

AJH

In message , Dave writes

Peristaltic ?

Try googling for dialysis pumps

No, that is not the type of pump I meant. Thanks for your reply, I'll go back to my original post and see if I can make it more descriptive.

Dave

Andy gave you the correct name. They use swash plate pumps. Also found in car aircon compressors.

Bob

It looks like I have confused some on here with this description.

Imagine looking down at an open round casing that has a multiple of enclosed pistons, mounted vertically in a circle and connected to the fluid supply with an output from these to the outside world below them. If a piston is pressed down on, it will create pressure. Each piston can only provide pressure by being depressed downwards.

Now imagine if this casing is covered by another half casing, that doesn't have to be fluid proof, with the motor driven disc I described above spinning round and pushing the pistons in turn as it rotates, because its mounting is not at 90 degrees to the drive shaft.

Is this a better description?

Dave

I think that you already have the answer, swash plate.

Not as good as this:

Everything you have written seems to confirm you are trying to describe what Andy & Bob have already posted.

Yes, but it does not change the answer.

And also to control the Bofors 40mm anti aircraft gun and an early Vickers motor car. Tilting the swash plate requires little energy but alters the output speed and direction smoothly.

As already mentioned, the swash plate pump.

From the link he gave me, this type of pump works by compressing a tube around the diameter of a casing, the pump I am going on about does not need a wall, or tube to work, just the pistons.

Just done a google and the wiki comes up with a diagram that is quite close to what I am on about.

Google hydraulic pumps and go to the wiki section a few answers down.

Scroll down until you get to the picture of the axial piston pumps. There is a diagram of a pump very similar to the one I want to find the name of. But the drive to this is from the back of the diagram, The one I am going on about is driven from the right with a variable angle circular rotating plate to operate the pump pistons. I admit that it uses a swash plate, but I would have thought it would have had another name.

Dave

Very close to what I wrote, but if this is the answer to my question, the pistons are stationary and the swash plate rotates. I think this might have been where my confusion came from.

Many thanks for your answer. I take it that the name of the pump is a swash plate pump. No reply required if I am right.

Many thanks

Dave

Many thanks for your time on this. Much appreciated.

Dave

Thank you Peter, we had those types of pump on the aircraft hydraulic systems, but I couldn't remember the name of them, hence my post.

Dave

Many thanks for all of you walking me through this question. I am very grateful to you all for your patience.

Dave

There are links from that page to wobble pump, radial piston pump, and bent axis pump. One of these might more precisely describe what you need. Or maybe elsewhere on that site?

Swash plate or wobble plate pump.

Yerbut its still a swash plate or axial piston pump.

That is a swash plate pump, but the ones used in pressure washers have the swash plate revolving & the piston housing stationary.

Nah, that's how yer bowels work! :-)