High Power hydraulic motor

[Pumpsonly]

I am looking for hydraulic motor to drive rotary screw pump.
Power >360kW at 1800RPM , Torque approx. 1950 Nm
Speed : 1800RPM-normal and variable.

Any one can recommend a maker?

TQ.

 

[Oldhydroman]

Your choice at this end of the product lines is a little limited.

Try Eaton Vickers (Hydrokraft MFW 500) or Bosch Rexroth (A2FM500 or A4FM500).

I've suggested a 500 cc/rev motor because this will give you about 7.5 Nm per bar. You can get your 1950 Nm at a typical working pressure of 280 bar (I've added on 20 bar for boost pressure - assuming you'll be running in a closed circuit). You could possibly drop down to a size 355 motor (Rexroth) but this puts the pressure up to some uncomfortable values which can dramtically shorten the life of the motor. The A2FM500 motor will allow you a top speed of 2000 rpm.

If you need to go faster then you could consider a variable diaplecemnt motor and reduce the displacement a little to permit the higher speed operation (a Rexroth A6VM500 destroked to 75% will allow a speed of 2650 rpm).

You could consider a pair of smaller swash plate motors (A4FM250) arranged as a tandem unit (one plugged into the back of the other) - the smaller motors can run faster, you need two of them to get your torque.

Regards

DOL

 

[Pumpsonly]

DOL,
Thanks for your info