help start sudden hydraulic engine

[sandrocchio]

hello to all, the problem I have on an application is that on I can start with a minimum of sweetness a hydraulic motor.
on the scheme that I attach as you see I have two distributors that fly 2 160cc hydraulic engines, the pumps are geared and they deliver each 6 liters per minute.
the problem is that when I move the levers of the distributors the engines turn but without a minimum of gradualness.
I tried to replace the distributors from 35 l nominal (galteh) with smaller from 17 l notorious brand but without results.
Can someone help me? ? ?

 

[MBT]

first, welcome
I suggest you present yourself well in the ot area or in the most congenital areas

It seems to me that there is something wrong in the representation of the valves in the schema you post
but apart from the graphic subtleties... valves are generally on/off type, so as soon as you move the drawer they tend to open up, generating a rough start of the engine
There are series of distributors that are made specifically for progressive start-ups
I don't have the catalogs underhand now
I can look for them Monday
if you're in a hurry, look for rexroth sites or vickers

 

[sandrocchio]

first, welcome
I suggest you present yourself well in the ot area or in the most congenital areas

It seems to me that there is something wrong in the representation of the valves in the schema you post
but apart from the graphic subtleties... valves are generally on/off type, so as soon as you move the drawer they tend to open up, generating a rough start of the engine
There are series of distributors that are made specifically for progressive start-ups
I don't have the catalogs underhand now
I can look for them Monday
if you're in a hurry, look for rexroth sites or vickers

Thanks to the answer, I apologize for not doing it right away, I am a mechanical engineer I am 42 years old working on industrialization of product in practical design mechanical equipment for the assembly of products like vending machines of drinks and work as an employee.
I have been working for 4 years with a company as a freelance designer who works in the forest field and hence the need to enter the field of teodynamics, but I have not taken care of.
I drew the valve by copying it from the catalog I used for the choice perhaps its representation is wrong at the source, if it is not too much trouble I ask you to indicate where it is not correct.
to sensitive distributors I had thought and sent cursors from high sensitivity firm, in practice they have triangle-shaped backgrounds that allow to pass small amounts of oil in the initial phase of shifting the lever but the results were disappointing.
I take advantage of asking you whether to change the degree of piloting or valves can be of help or not. I now use valves with driver 2.5 if the increase according to you I can improve the graduality of motors, I thought that increasing the near even if low starter I go to pilot the valve that is in exhaustion to the motor opening it equindi I would be led to think that the motor is free to start to rotate also with a lower pressure always of course that the applied load is little.

Thank you.

 

[LuiVerde]

if I'm not mistaken there are proportional distributors that can be manual or electrically controlled that can do to your case if I don't remember bad of walvoil try to see here http://www.walvoil.com/ita/prodotti.htm hi and good work

 

[Luca N.1]

. now I use valves with driver 2.5 if the increase according to you can improve the graduality of motors,

You mean the valve piloting report?
How much are the valves? .... what kind of work do engines?

 

[MBT]

attention, that holeodynamics does not improvise!!!!
is a profession that requires preparation and experience
the company with which we collaborate has 30 years of experience behind us, and despite all sometimes wonders of unexpected behaviors of systems
Besides, it's in the vein, so if you need... made to feel via pm

Anyway, I think you can try this kind of valves.
http:/www.boschrexroth.com/i Indust...évhist=g54569,g54576,g54601 dealingsid=p78433but I repeat, I am not experienced. we used these in some application, not with engines but with cylinders to move gradually

 

[Borgotech]

Could you know how you solved the problem? I'm very interested, thank you.