Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
High Power hydraulic motor
- Thread starter Pumpsonly
- Start date
Oldhydroman
Mechanical
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
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
- Thread starter
- #3
- Status
