Two Valve Manifold Options
7 Standard Bolt-on Manifold
4 Standard Integral Manifold
Two Feedback Options
Parker Series 2HX Actuators!
Bolt-on and Integral Servo/Proportional/NFPA Valve Manifolds and Two Feedback Options
Series 2HX Electrohydraulic Actuators are specifically designed to meet today!¯s demand for more efficient, lo cost actuators that meet your application requirements.
To ensure that every electrohydraulic actuator is premium quality, we subject each and every one ¨C not jus batch samples ¨C to tough inspectio and performance tests. Plus as the world!¯s largest and lowest cost cylin der producer, we offer you the Series 2HX electrohydraulic actuator at the lowest cost that helps you stretch those tight design budgets without sacrificing quality.
The Parker System is a worldwide network of manufacturing plants and distribution centers for fast, dependable service and delivery. Parker provides you with local sales and technical assistance from hundreds of stocking distributors and regional offices.
Contact Parker Cylinder Division for further assistance or information on designing the Series 2HX electrohydraulic actuator to meet your motion control requirements.
In a LDT position sensor, a pulse is induced in a specially designed magnetostrictive waveguide by the momentary interaction of two magnetic fields. One field comes from a movable magnet which passes along the outside of the sensor tube, the other field comes from a current pulse or interrogation pulse launched along the waveguide. The interaction between the two magnetic fields produces a strain pulse, which travels at sonic speed along the waveguide until the pulse is detected at the head of the sensor. The position of the magnet is determined with high precision by measuring the elapsed time between the launching of the electronic interrogation pulse and the arrival of the strain pulse. As a result, accurate noncontact position sensing is achieved with absolutely no wear to the sensing components.
An average of 200 ultrasonic strain pulses are launched for every reading. With so many readings taken for each position, vibration and shock have negligible effect on the readings. The transducer assembly is shielded to eliminate interference caused by electromagnetic fields in the radio frequency range. In addition, static magnetic fields of several hundred gauss must get as close as 3/16" from the protective tube before any interference in transducer operation occurs.
Available in strokes to 120!.
Unique, easy to apply cylinder position sensing system.
Infinite resolution, high linearity and repeatability.
Innovative, resistive element is made of conductive plastic.
3 pin Brad Harrison electrical connector available at any cap position not occupied by a port or mount.
How It Works
The Parker LRT is a uniquely designed position sensor that uses a resistive element and wiper assembly to provide an analog output signal of a cylinder!s position. The LRT is a dual element type linear potentiometer with two independent elements mounted on either side of a anodized aluminum extrusion. The LRT operates as a voltage divider. This is done by shorting through the extrusion with the wiper assembly. The position of the wiper changes the resistive load proportional to its position along the cylinder stroke. The LRT is energized by applying a voltage across the unit, typically 10 VDC. As the resistive load changes with the cylinder stroke, the output voltage changes proportionally. The output voltage at the end point of the cylinder stroke is dictated by the input voltage applied across the device. The probe is mounted into the cylinder cap and inserted into the gun drilled piston rod. The compactness of the design only adds to the envelope dimensions of cylinders with 1-3/4" rods and smaller. Envelope dimensions of cylinders with larger rods are unaffected.
How It Works
Non-Linearity ¨ Less than 0.1% of full scale up to 48! stroke. Less than 1.0% of full scale over 48! stroke. Repeatability ¨ .001 inch Input Voltage ¨ Nominal 5-50 Vdc Operating Temperature Range ¨ -40!F to +160!F Cylinder Stroke Length ¨ Up to 120! Electrical Connector ¨ Brad Harrison 3-pin micro connector interface at pos. #4 standard. (Unless occupied by a port or mount.) Total Resistance ¨ 800 per inch of stroke (°?20%) + en resistance. End Resistance ¨ 800 Maximum Velocity ¨ 30 inches per second 6 Life Expectancy ¨ Greater that 50 x 10 cycles (Based on 1! stroke @ 10 ips) Fluid Medium ¨ Petroleum based hydraulic fluids End Voltage Loss ¨ (V source) x 400/stroke x 800) Power Dissipation ¨ supply voltage squared, divided by the total resistance. The LRT requires a high impedance interface greater than 100K ohms. A maximum of 1 microamp should be re- quired from the LRT.
Innovative Motion Control
Parker's new Series 2HX is an integrated assembly that eliminates transducer mounting brackets, valve manifolds, plumbing and other items associated with using separate components. The versatility of the Series 2HX allows you to design cost effective actuators for accurate position and velocity control for your specific application.
Features and Benefits
Minimum hydraulic line runs with closed cylinder and valve coupling
Simplified machine design with integrated components Eliminates the need for limit switches, deceleration
valves, shock absorbers, and mechanical linkages in many applications
Minimum interference with standard mounting dimensions
Manifold may be mounted on head or cap end at any position not occupied by a mount
7 standard valve patterns
Integral mounted valve eliminates assembly time and fittings.
Custom manifolds available - consult factory
Custom Options Available
Low friction rod gland ¨ see page 193 for specifications
Hi-Load Piston ¨ see Section C, page 4
Protective feedback enclosures
Intrinsically safe modifications
Feedback devices in stock for quick delivery of common stroke lengths
Closed-loop control for maximum productivity
Complete, tested cylinder/feedback assemblies customized to your needs
2HX with Bolt-on Manifold and Magnetorestrictive Linear Displacement Transducer (LDT)
Here's How The Parker LDT Feeds Back Linear Position
The linear displacement transducer is rigidly attached to the cap end of the cylinder, and runs the full stroke length inside a hollow piston rod. A magnet is attached to the cylinder piston. As the piston moves through the stroke, the transducer is able to define the exact position of the magnet by measuring the time interval between the
initiation and the return of the strain pulses launched in the transducer wave guide.
For LDT specifications see page 186.
For base cylinder dimensions see page B-149.
2HX with Bolt-on Manifold and Linear Potentiometer (LRT)
Here's How The Parker LRT Feeds Back Linear Position
The LRT feedback device is essentially a linear potentiometer which provides a cost effective solution for applications where a contacting device is acceptable. The potentiometer is fixed to the rear cap of the cylinder and runs the full length inside a hollow piston rod. The wiper assembly is fixed to the piston. As the piston moves
through the stroke, the wiper voltage changes in proportion to the cylinder position.
For specifications on the LRT see page 191.
For base cylinder dimensions see page B-151.