Hy-Pack answers to mobile application needs
Hy-Pack answers to mobile application needs
For years Pratissoli has been offering a full range of high pressure plunger pumps with integrated motor (HY-PACK series). Hy-Pack answers to mobile application needs on the cleaning market.
This new configuration benefits more compared to the traditional setup where a flange and flexible coupling is used between the pump and motor; the configuration is much more compact, while offering significant weight and space savings.
The assembly time needed for the Hypack series is also much shorter than that for a traditional setup with flange and flexible coupling.
Hydraulic Motors
The range of hydraulic motors offers a choice from 10 versions with a torque of up to 590 Nm.
- The GEAR MOTORS offer options to max. 280 bar and 2,600 rpm (rotations per minute).
- The PISTON motor segment offers options up to max. 340 bar and 2,600 rpm.
How hydraulic motors work?
Triplex plunger pumps use mechanical force (rpm and torque) to generate a specific pressure and flow.
In hydraulic power transmission, this force is transferred from the motor gearbox to the consumer unit through a hydraulic pump and motor. The pump converts mechanical force into hydraulic force (flow and pressure), and the hydraulic motor then converts it back into mechanical force (rpm and torque).
Different versions in cc/revs for both the GEAR and PISTON motors:
- Gear motors: based on the length of the ring gears and the internal and external diameter of the gear.
- Piston motor: by the piston diameter and the number of pistons.
How to choose the right hydraulic motor?
Before making a choice, you should know the pump's torque and the motor cylinder capacity:
- Pump’s torque, what is it?
If you don’t know, this can be easily calculated using the following formula:
Nm = Q (lpm) x P (bar) x 18.22/rpm.
This is the torque generated by the water pump at the given rpm and operational pressure.
- Motor cylinder capacity.
Once we know the torque we must still find the appropriate motor. We also use a formula here:
Cylinder capacity (cc/revs) = torque (Nm) x 62.8/oil pressure (bar) x 0.85 vol. eff.
Demonstration
The customer has a KF36 at 150 lpm (litres per minute), at 130 bar, 1,000 rpm and availability of approximately 230 bar oil pressure.
Nm = 150 lpm x 130 bar x 18.22/1,000 rpm = 355 Nm
Cylinder capacity (cc) = 355 Nm x 62.8/230 bar x 0.85 vol. eff = 114 cc.
This means the ideal motor for this pump is a 114 cc motor!
Obviously Pratissoli has already made the calculation for you, so the catalogue includes all possible Hy-pack versions per pump type!
Ask our sales team for the Pratissoli Catalogue!