ad ingranaggi pump

[pizap]

Help! !
I humbly ask your help for a problem I have at work.
in the company for which we work we have gear pumps of the same type of the same capacity and flow that:
- some go high pressure
- other low pressure
the question and this how ever pumps of the same type (with same geometries and with quotas in tolerance) (project already controlled by several people giving all the same positive reference as goodness) some go on pressure others not??? ? ?
I know well that a pump does not generate pressure but flow and pressure is given to me by the load.... but in this case the load is always the same.. .

 

[Enigma]

you will certainly have two different powers, since:

p(mot) = q*p/rend.

p(mot) = electric motor power
q= pump flow
p= pressure pump
rend. = overall performance

enigma

 

[pizap]

Thanks for the answer.. .
according to the calculations of power and yield for the put motor and geometries to pump should have a maximum pressure of 83 bar approximately while many times it happens that some of them do not exceed the 50 bars..direction in some as they work the pressure drops brutally without having trafilments. . .
ipressionante....

 

[PierArg]

quite negative way to approach in a forum!

- Did you introduce yourself? I don't think so.
- Did you read the rules? I exclude it.
- Starting with "help", "help", " urgent need" is a bad business card.

in all cases welcome in the forum.

What do you mean, "some go high-pressure and others low"?
in the sense that they are not going (they break) or is it just a question of " catalog values"?

Have you checked the materials used and the processing of semi-finished products well?
For example, for high pressure, the body is used by reverse extrusion.


Maybe post photos of the pumps in question.

 

[MBT]

I would add.. .
attaches a test bench pattern and a summing board with pressure, flow, absorption, lap numbers both loaded and empty

 

[fcorallo]

other question, which might seem trivial but is not:
in the various tests made oil is always the same? has the right characters?, the question comes from your statement:
even in some as they work the pressure drops brutally without drawing. . .this could be just an oil problem: cold has a certain viscosity and the pump manages to push it, as soon as it heats it loses the characteristics (it comes as the water in substance) and the pump does not send it in pressure

 

[carlett]

How do you generate the load on the pump? a maximum pressure valve? A fucker? brake a hydraulic motor? lift a load with a cylinder?

 

[Bernoulli]

Pizap let us know!