EATON closed-loop piston motors 71392 series - medium duty

 

Eaton closed-loop variable displacement motors 71392 series – medium duty

Working Principle
Axial piston motor uses a variable cam / swash plate to change the motor displacement. Shuttle valve mounted on end cover, ports high pressure oil from either side to the control piston. When the control valve is energized, ports E and F are connected and therefore contain equal pressure. The area differential (rod side vs back side of the piston) creates a force that pushes the piston to the right, taking the motor to max displacement. High side system pressure (not charge pressure) must be used to actuate the cylinder. Most of the flow from the pump goes to turn the rotating kit, leaving only a small amount of flow to go across the shuttle valve and into the cylinder. Therefore, there is no issue with too much flow going into the cylinder and having nowhere to go.
 

 

SPECIFICATION	MODEL 71302/71392
Maximum Displacement	40.6 to 21.0 cm3/r [2.48 to 1.28 in3/r]
Maximum Rated Speed	3600 RPM at 17° Conrol Angle
	4500 RPM at 9° Control Angle
Nominal Pressure Rating*	350 bar [5076 lbf/in2]
Peak Pressure Rating**	370 bar [5400 lbf/in2]
Input Flow at Rated Speed	175.71 l/min [38.65 GPM] at and Pressure 17° Control Angle
Output Power at Rated Speed	85.30 kW [114.50 hp] at and Pressure 17° Control Angle
Output Torque at Rated Speed	226.27 N•m [2004.54 lbf•in] at and Pressure 17° Control Angle
Continuous Allowable Case Pressure	1.7 bar [25 lbf/in2]
Continuous Inlet Temperature	107°C [225°F]
Weight/Single Motor (approximate)	9.5 kg [21 lbs]

*Nominal Pressure: Max delta system pressure at which component fatigue does not occur
(motor life estimated by bearing life).
**Peak Pressure: Max operation pressure which is permissible for a short duration of time (t < 1 sec).

EATON closed-loop piston motors 72450 series - medium duty

Features
• SAE B- B, 2 Bolt Mount, Cradle Swashplate
• Bi-directional rotation
• Auxiliary through-drive shaft available for brake mounts
• Standard SAE splined shafts, Optional taper shafts
• Same Side ports
• System pressure guage ports
• Optional shuttle valve available

 

SPECIFICATION	MODEL 72450	MODEL 72450
Maximum Displacement	40.6 cm3/r [2.48 in3/r]	49 cm3/r [3.00 in3/r]
Maximum Rated Speed	4500 RPM at minimum stroke angle	4500 RPM at minimum stroke angle
	3600 RPM at maximum stroke angle	3600 RPM at maximum stroke angle
Nominal Pressure Rating*	350 bar [5076 lbf/in2]	280 bar [4061 lbf/in2]
Peak Pressure Rating**	372 bar [5395 lbf/in2]	310 bar [4496 lbf/in2]
Input Flow at Rated Speed and Pressure	175.71 l/min [38.65 GPM]	212.53 l/min [46.75 GPM]
Output Power at Rated Speed and Pressure	85.30 kW [114.50 hp]	82.36 kW [110.81 hp]
Output Torque at Rated Speed and Pressure	226.27 N•m [2004.54 lbf•in] at 17° Control Angle	218.47 N•m [1940 lbf•in] at 17° Control Angle
Continuous Allowable Case Pressure	1.7 bar [25 lbf-in2]	1.7 bar [25 lbf-in2]
Continuous Inlet Temperature	107° C [225° F]	107° C [225° F]

 

*Nominal Pressure: Max delta system pressure at which component fatigue does not occur (motor life estimated by bearing life).
**Peak Pressure: Max operation pressure which is permissible for a short duration of time (t < 1 sec).

DuraForce motors HMV, HMR series

Eaton's DuraForce family of variable axial piston motors features the HMV and HMR Series - both delivering smooth repeatable torque delivery, high efficiency through the operating range and durability to handle extreme duty cycles. Both product series can be purchased in sizes from 55cc to 280cc and are well packaged to fit in tight spaces. 

Addresses these engineering challenges:

Sensitive applications can require a high starting torque efficiency in order to maintain smooth, repeatable torque delivery at low speed conditions.

Smooth low-speed operation
High starting torque
Wide torque / speed conversion range
Highly dynamic response characteristics
Compact design
High power density
High reliability
Long service life
Simplified drive line 

Features and Benefits:

• Modular design allows promote greater flexibility for possible applications
• Easily configurable, interchangeable controls optimize system efficiency

Technical Information

HMV Series

• Stepless or two position control
• Electric or hydraulic control
• Override pressure control possible
• Brake pressure shut off possible
• Can be set to 0 cm³/rev
• Double motor available
• Displacement ranges: 35 cc to 280 cc (2.14 cu in to 17.1 cu in)
• Pressures range: up to 420 bar (6,100 psi)

HMR Series 

• Optionally with purge valve for circuit and case flushing in closed loop circuit
• System pressure regulation, no external control lines required
• Brake pressure shut off for closed loop circuit
• Counterbalance (brake) valve CBV optional
• Displacement ranges: 35 cc to 280 cc (2.14 cu in to 17.1 cu in)
• Pressures range: up to 420 bar (6,100 psi)

Motors BAV7 series

The new BAV7 series bent axis motors are designed for operation in both open and closed circuit. Incorporating the lens shaped proven design valve plate, high quality components and manufacturing techniques allow the BAV7 series motors to operate up at 430 bar (6235 psi) continuous and 480 bar (6960 psi) peak pressures. Fully laboratory tested and field proven, these motors provide maximum efficiency and long life even in the most demanding conditions. Heavy duty bearings permit high radial and axial loads. The versatile design includes a variety of control and mounting options that will adapt the BAV7 series motors to any industrial or mobile application. A full range of options are available to tailor these units to your application needs. To optimize vehicle operating characteristics, an array of control options are available on variable displacement models; automatic, operator selectable, hydraulic pressure response and proportional, electric proportional, manual.
Typical Applications:
• Earth moving machines and construction equipment
• Agricultural and forestry vehicles
• Marine and off-shore equipment
• Industrial conveying, mixing & other stationary in-plant uses

Eaton Hydre-MAC low-speed radial motors

Hydre-MAC™ Radial piston motor Direct drive variable speed machines benefit dramatically from Eaton’s new radial piston hydraulic motor. Class leading torque density decreases machine structural element costs, and reduces machine footprint. Superior mechanical efficiency further reduces energy consumption across a 2000:1 speed ratio while delivering full torque to the machine shaft. Over 90% stall torque efficiency allows the designer to avoid over-sizing the motor, and lowers overall maximum pressure requirements of the system. The low inertia design features enable instant stopping and reversing for highly dynamic applications and prevents torque spikes which could damage the machine elements and bearings. Shaft mounted and torque arm restrained features lowers coupling and mounting costs associated with extremely high torque applications. Multiple port configurations and locations offer the machine designer myriad solutions for the ultimate in flexibility. Integral multi-disc brake, torque arm kits and speed encoder options further expand the possibilities enabling the machine designer constraint free solutions.
Features and benefits:
• High Efficiency lowers operating costs
• Replaceable wear surfaces lowers maintenance costs by extending maintenance intervals
• Very low pressure drop delivers more output torque
• Symmetrical design reduces uneven loading to increase operating life

Applications:

• Pulp and paper
• Pulp washers
• Digesters
• De-barkers
• Conveyors

Mining:

• Bucket wheel reclaimers
• Apron feeders
• Breakers

Recycling:

• Shredders

Marine:

• Cutter wheel dredges
• Winches