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WPT Power Grip PO Clutches:
for oilfield and general industrial applications from 14" through 30" diameter. 3,750 Lb.Ft(5,086 Nm) through 97,500 Lb.Ft.(132,239 Nm) static torque.
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Pneumatically operated multi-disc clutches
Characteristics:
Pneumatically operated multi-disc clutches.
Engaged by compressed air - axial or radial supply through the shaft.
Opened by spring pressure (in special cases vice versa), free from axial forces
* requiring less maintenance
* small teeth backlash with the discs
* excess service pressure 5.5 bar
* torque 120 to 60000 Nm (higher torques on request)
* wet operation or dry operation possible by selection of suitable disc combinations
* outer diameter 114 to 640 mm
* several friction faces - low residual torque in open condition
* small dimensions
* high torques
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Airflex CB element assemblies are used as both clutches and brakes in general power transmission service. The primary feature of the CB design and construction is the Airflex torsional resilient principle made possible by the transmission of power through the side walls of the flexible neoprene and cord actuating tube. This flexibility also permits minor shaft misalignment.
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for the contact-free torque transfer to other mediums (through walls)
These 2-parts magnet disk clutches transfer torques to max. 53 Nm contact-free through walls of all kinds. Thereby for eaxample become.:
pumps, agitators or compressors in closed fluid containers propelled
fans in closed containers with gases or steams propelled
the power transmission to underwater bionic arms enabled
the transfer of display processes on a round scale in another medium enabled
transfer of engine vibrations avoided
a weight influence with cradle processes uncoupled
The magnet disks are also applicable as constituents of hysteresis brakes.
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The most popular range of MEROBEL's EMP Brakes, offering tailored solutions for every needs from its 10 sizes and up to 5 different version (acceptable power dissipation level) for each size.
- EMP technology (ElectroMagnetic Particle)
- Torque proportional to the electric current, independent of the slipping speed
- 5 different versions (power dissipation) available
MEROBEL's EMP clutches are built from the addition of slip ring and brushes to the EMP brakes.
This range of devices is offering two different power dissipation levels for each size (without or with cooling fins)
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Airflex E elements are primarily used as slip clutches or tension brakes; however, they can also be used for general power transmission service. Torque is transmitted from the friction shoes to the element housing through torque bars. Engagement occurs when air expands the actuating tube forcing the friction shoes against the inside diameter of the drum. Release springs assist shoe disengagement and counteracts centrifugal force.
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Couple : 100 à 204 800 N.m
Vitesse : 3 600 à 600 min-1
Pression de fonctionnement : 8 à 22 bars
Alimentation axiale
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Magnetic particle brakes and clutches are of simple design. Due to their size they produce a high torque compared to for instance hysteresis brakes. They are having two rotors (inner and outer) and an air gap between these two rotors where the magnetic particles are dispersed in. An electric current passing through the coil creates a magnetic field, which aligns the magnetic powder into the gap. The higher the current, the more rigid the connection between the inner and outer rotor becomes. The principle is the same for brake, clutch and torque limitor.
Advantages:
Noisless work
Torque directly proportional to current
Torque independant from r.p.m. (starting from 30 min)
Strong design, units are able to be used with steady slipping
High torque range to be controlled (approx 1:50)
Applications:
Braking
Torque control, torque limiting
Tension control at winding, unwinding
Starting clutch operation
Calculated braking and starting
of certain masses and inertias
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Marland Clutch brings to the North American market a line of proven sprag type free-wheel clutches. Marland utilizes the knowledge of its sister divisions, Stieber® of Germany and Formsprag® of the United States, to manufacture world class high performance sprag clutches in the United States.
The RMS, RMT and RMI model freewheels include ball bearings and seals. These self-contained freewheels have a bolt circle on their outer race (see dimension "B") to which pulleys, gears and torque arms can be mounted. The freewheels are mounted onto shafts which may be of any diameter up to and including the maximum bore shown below. Keyways are provided.
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Features:
- Rugged cam clutch designed for applications where space and weight are factors in clutch selection
- Full complement of cams held in outer races
- Input shaft used as inner race must be hardened and ground to size
- Interchangeable with competitor products
- Bearing support and lubrication required
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Airflex VE elements were specially designed for greater heat dissipation capacity in an expanding type element. Available in a limited number of sizes, they offer all of the type E features.
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Airflex EB element assemblies are used in both clutch and brake service with light starting loads. The EB is similar in design to the CB except that it is an expanding type unit.
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Airflex ER couplings are expanding units with neoprene facing. As such, they combine the advantages of a flexible and disconnect coupling. Engagement of the element should occur when there is no speed differential between driving and driven shaft.
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Electromagnetic toothed clutches
Characteristics:
Electromagnetic toothed clutches
Engaged by 24 volts or 110 volts D.C. (others on request).
Released by spring pressure (in special cases also vice versa).
* Torque 20 to 100000 Nm (higher torques on request)
* Wet or dry operation
* Outer diameter 60 to 850 mm
* Smallest dimensions with highest torques
* Torque transmission through form-fit crown gears
* Engagement at speed zero only
* No residual torque in open condition
* Small teeth backlash at the guiding teeth
* In relation to the specific series, zero backlash possible
* With shaft/hub clutch free from axial force
* With shaft separating clutches less axial force with engaged clutch
* With or without sliprings
* Maintenance-free or less maintenance required
* Simple handling
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Eddy Current clutches give torque as a function of RPM. The faster you turn the rotor, the more torque. This means by increasing or decreasing the RPM, you can get infinite torque adjustment. Typically, we rate the clutch with a gain factor (k), which is gram millimeters/rpm or Newton meters/rpm and we design the clutch to have an operating "slip rpm" between 1 and 300 rpm.
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The electromagnetic Powder Coupling combines the resilience of a fluid coupling with the locked-in stability of a friction clutch. Torque is transmitted by a specially alloyed dry ferromagnetic powder, the apparent viscosity of which may be changed by modulation of the field coil current . The couplings can sustain continuous slip (within their empirically estabilished heat ratings) at a precise and stable torque value, which is determined by excitation level.
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For every application determine the TORQUE, MAXIMUM RPM, and for brakes, the BENDING MOMENT.
Then you can choose the correct shaft or coupling, and various accessories.
All important internal clearances are ground to tolerances of less than .025mm (.001 in). Magnet Assemblies (purple) surround our hysteresis disc (gold). When like poles face each other, they produce maximum magnetic saturation, forcing lines of flux to travel circumferentially through the hysteresis disc. This produces Maximum torque.
When opposite poles face each other, they produce minimum saturation of the hysteresis disc. The lines of flux travel right through the hysteresis disc. Combinations of adjustment angles between these two extremes gives infinite adjustability. Because there are no contacting surfaces, the setting can be maintained indefinitely.
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Clutches
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