multiplier turn

[Patrick Gorza]

Good morning forum.
I would like to buy the oil pump 2 stages (high/low) as attached in photo.
I also have to "flangiarla" to a 1:3,8 turn multiplier that are commonly purchased online.
the problem arises from the different flanging between pump and multiplier (from 2 to 4 holes).
this because usually these pumps are connected directly to electric motors or internal combustion with a high number of turns. it is not my case; I will connect it to a tractor with pto at 1000 rpm.
the pump works at about 200 bar as a common gear pump, but the required speed in the input pump / output multiplier (3600 rpm) exceeds that of a common multiplier, which at best is around 3000 rpm
do you know where I can buy a multiplier with that flanging and those technical characteristics?
thanks and good new year to the whole forum!
Patrick.

 

[meccanicamg]

As for the flange, I can tell you that with a lathe and a drill you build the flange you like most. probably it will be worth, if they are all male trees, to join with joint star type rotex.As for turn multipliers, I can tell you that most mechanical gearboxes can be used by inverting from where you pick up and where you feed. you can think of gsm-stm that I can also make special flanges, since they also run out of standard, otherwise you can go on a red parallel axle reducer and see what they can give you. otherwise it is necessary to have it built specifically. Actually the bearings that turn over 3000rpm are not a problem. gears simply do them well, rectified and with modified profile to increase the magnification stiffness. with regard to the seals we pass to those in viton and not in nbr. lubrication, it might have some foaming problem if it slams too, so you might think of making a separate tank with oil and putting an electropop or a gear pump to pump oil in the bearings and in the gearing of the toothed wheels.

on the net are found many builders with multipliers, perhaps it would be worth contacting them....type This is... This is.see pdf.

the gear pump is not the best for this job.

 

[Patrick Gorza]

Hello mechanicalmg.
Unfortunately the multipliers on the market that you have indicated do not come to those turns and they mount flange sae b. I know so much that I will have to make it.. .
a further question, already that we are on the subject: If I opt for a tandem pump, instead of a 2-stage, what is the substantial difference?
Thank you.
Patrick.

 

[meccanicamg]

I never used tandem pumps. But you can see how it works qui.
the two-stage pump instead has a unique rotation shaft with two mounted pumps, then double flow of a single pump. with double stage if you make different displacements you can manage high pressure pump to split and low pressure pump but high flow rate to run fast. the problem is that the exchange is not fluid as a variable displacement but is not bad and costs less than a piston pump.

 

[Marco F inox]

ciao @patrickIn addition to what has already been suggested, I would opt for the epicycloidal reducer/multiplier, which in addition to being coaxial, has many other advantages over other parallel axes, such as commuter.
If the ratio does not reach 3,8:1, keep in mind that in a tractor you also have the accelerator, which can lead you to ideal turns.
the flanging, if it creates too many problems, you can also avoid it, fitting among them the three trees with appropriate couplings, force-multiplier grip and multiplier-pump.
then connect with the tractor, as you do with certain irrigation pumps, i.e. to swing on the grip of force with rods.
the rods must be made with chain, a power station for resting and two side to avoid rotation.

 

[Patrick Gorza]

ciao @patrickIn addition to what has already been suggested, I would opt for the epicycloidal reducer/multiplier, which in addition to being coaxial, has many other advantages over other parallel axes, such as commuter.
If the ratio does not reach 3,8:1, keep in mind that in a tractor you also have the accelerator, which can lead you to ideal turns.
the flanging, if it creates too many problems, you can also avoid it, fitting among them the three trees with appropriate couplings, force-multiplier grip and multiplier-pump.
then connect with the tractor, as you do with certain irrigation pumps, i.e. to swing on the grip of force with rods.
the rods must be made with chain, a power station for resting and two side to avoid rotation.

Hello, Marco.
I was almost thinking about adopting a simple tandem pump, where everything (pumps + multiplier) is found online.
I would like to first understand the difference between the two oleod systems. and possibly search for the multiplier you suggested to me...
Thank you.

 

[meccanicamg]

Good morning forum.
I would like to buy the oil pump 2 stages (high/low) as attached in photo.
I also have to "flangiarla" to a 1:3,8 turn multiplier that are commonly purchased online.
the problem arises from the different flanging between pump and multiplier (from 2 to 4 holes).
this because usually these pumps are connected directly to electric motors or internal combustion with a high number of turns. it is not my case; I will connect it to a tractor with pto at 1000 rpm.
the pump works at about 200 bar as a common gear pump, but the required speed in the input pump / output multiplier (3600 rpm) exceeds that of a common multiplier, which at best is around 3000 rpm
do you know where I can buy a multiplier with that flanging and those technical characteristics?
thanks and good new year to the whole forum!
Patrick.

a two-stage hydraulic pump has two pistons moving in synchronia, or in case of gears has two stages moved by the same engine shaft, and which increase oil pressure in two successive stages. This type of pump is used to generate higher pressure than single-stage hydraulic pumps.

a tandem hydraulic pump consists of two series related hydraulic pumps, where the output flow of the first pump is directly connected to the entrance of the second pump. This system allows for even greater pressure than a two-stage pump or a single-stage pump, as the two pumps work together to generate greater pressure.

in conclusion, the main difference between a pump oleodynamic two stadsi and a pump oleodynamics in tandem is that a two-stage pump has two pistons that increase the pressure in two separate phases, while a tandem pump consists of two series connected pumps to generate even greater pressure.

but in all this the flow does not increase.