ΠΕΡΙΟΡΙΣΤΕΣ ΡΟΠΗΣ
Bibbygard torque limiting modules are designed to be incorporated between two flanges and preset to release at a specified torque value in order to protect the drive system from expensive damage and lost production. They can be used with various types of drive medium. Bibbigard has been successfully utilized in many different industries where, subject to space availability, the release torque capacity is virtually unlimited.
- Accurate release torque repeatability
- Simple fast manual re-engagement
- Low-cost maintenance
- Versatile mounting capability
Typical Applications:
- Steel Mill Equipment
- Conveyor Drives
- Twin Screw Extruders
- Wood Grinding Machinery
- Ball Mill Drives
- Water Treatment Equipment
- Tunnel Boring Machines
UEP Series 2 Modular Torque Limiters
Bibby Turboflex’s extensive experience developed the Ultimate Extruder Protection device affording reliable protection for twin screw extruders.
Based on over 30 years experience in arduous applications particularly in the steel industry has led to the development of the Bibby Modular Torque Limiter which has become the industry standard for twin screw extruder machines.
Features & Benefits:
- Accurate release torque repeatability
- Simple fast manual re-engagement
- Low-cost maintenance
- The preferred protection for many extruder manufacturers
Standard Disc Spring Torque Limiters
During normal running torque is continuously transmitted from the hub to the flange through balls or rollers held in indentations in matching halves of a carrier flange by disc springs. As the torque exceeds a pre-set limit the balls or rollers are forced out of their indentations, allowing the flange sections to rotate separately. At this point the torque being transmitted is negligible and a limit switch is activated to signal emergency stop of the motor. In Quick Guard versions re-engagement is automatic as soon as the torque has fallen below the pre-set value. Synchronous versions also re-engage automatically but after one full revolution has been completed. In the Continuous version, the rollers are prevented from fully disengaging and a switch is activated to signal motor stop. The Free Running version also disengages the drive at a pre-set torque value but must be manually re-set to re-engage the drive.
- Very low backlash
- low moment of inertia
- Minimised dimensions & weight
- Reduced wear for longer lifetime
- ZBC for heavy duty
- NBC fo light duty
Quick Guard:
1. Disengages at pre-set torque
2. Automatically re-engages as load reduces – 15 degrees of rotation
Synchronous
1. Re-engages after 360 degrees
Continuous
1. Drive does not fully disengage to ensure torque transmission is not interrupted
2. Micro-switch is activated
3. Manual/electronic re-set required
Free Running
1. Drive fully disengages
2. Manual reset required to re-engage drive
Type A: Basic Type, for connection shaft-drive component such as gear or pulley, supported on the shaft
Type B: With Roller Bearing Flange, with drive centering flange mounted on a roller bearing. Ready For Mounting.
Type C: With Extended Hubs, Bearing or bronze bushes can be mounted on it to support large drive components.
Type D: With Elastic Coupling, for Connecting two coaxial shafts
Mini Disc Spring Torque Limiters
- Very low backlash
- low moment of inertia
- Minimised dimensions & weight
- Reduced wear for longer lifetime
- ZBC for heavy duty
- NBC fo light duty
Quick Guard:
1. Disengages at pre-set torque
2. Automatically re-engages as load reduces – 15 degrees of rotation
Synchronous
1. Re-engages after 360 degrees
Type E: Mini with Elastic Coupling, for connection shaft-drive component such as gear or pulley, supported on the shaft
Type F: Mini with Extended Hub, For connection shaft-drive component such as gear or pulley, supported on the shaft
Type G: Mini with Elastic Coupling, For Connecting two coaxial shafts
ZBC Heavy Duty - NBC Light Duty | Zero Backlash Torque Limiters
The advantages of the system, compared to the traditional types
- Torque limiters with backlash close to zero (ZBC is the heavy duty series, NBC is the light duty series)
- Lower moment of inertia, reduced dimensions and weight
- Longer lifetime, reduced wear
Quick Guard:
1. Disengages at pre-set torque
2. Automatically re-engages as load reduces – 15 degrees of rotation
Synchronous
1. Re-engages after 360 degrees
Type H: Basic Form Pilot Bored
Type J: Basic Form with Clamping Elements
Type K: For Large Drives, Pilot Bored
Type L: For Large Drives, with Clamped Element
Type M: With Lamellar Coupling, Pilot Bored
Type N: With Lamellar Coupling and Clamping Equipment
Type P: With Flexible Coupling and Clamping Hub
Type R: With Flexible Coupling and Shrink Disc
Type T: With Flexible Coupling, Pilot Bored
Bibbigard® Torque Limiters
Bibbigard® Torque Limiters eliminate the problems associated with slow reaction electrical overload devices, shear pins which give a wide release torque variation, or slip clutches which may rapidly overheat.
Bibbigard® products can save you money - the initial cost is frequently more than covered by the saving in down-time even on the first overload.
- Protect plant and transmission against overload.
- Full bi-directional operation in any plane.
- All metal, totally-enclosed construction.
- Virtually no maintenance.
- Provide years of trouble-free service.
- Competitive first cost.
Many of our torque limiters have been purpose designed and manufactured to meet customers’ specific operating requirements. If you have any specific requirements please contact Bibby Transmissions for assistance.
Boring and Keywaying
Standard bores and keyways are manufactured to H8 and Js9 tolerances to BS4500: 1969, both in Metric and Imperial dimensions.
Maintenance
During assembly all units are packed with a 3% Molybdenum Disulphide (Mo S2) grease BP Energrease L21 M. Because of their uniquely fully enclosed design all units need only be stripped and re-packed with grease every two years. However, under extremely adverse conditions of environment and duty please consult Bibby Transmissions.
Running in Oil
All Bibbigard units can be run in oil if required without affecting performance.
Typical Applications:
Manual Reset: Type A: Conveyors, machine tools, wood working and paper machinery, pumps, textile machinery, test rigs, packaging machinery, quarrying plant, Post Office machinery, extruders, automatic furnaces and ovens.
Automatic Reset: Type B & C: Conveyors, bakery equipment, indexing drives, packaging, bottling and labelling machines, printing presses and special-purpose machines.
Power Take-Off Protection: Type FV: Vane, lobe, screw and centrifugal pumps. Vane and lobe blowers, please contact Bibby Transmissions for further details.
Back Stops
Fitting a Bibbigard Backstop cuts out the danger of fully loaded conveyors running back for any reason. These non-lubricated, fail-safe products operate without reliance on a power source or manual operation: rapidly and effectively, every time.