YOXv Connection Dimension Data Sheet for Torque-Limiting Fluid Coupling with Extended Rear Auxiliary Chamber

Note: Structural characteristics, performance, and selection precautions:

• The rear auxiliary chamber is extended, resulting in an increased volume. During overload, more working fluid is discharged from the working chamber into the rear auxiliary chamber, which significantly reduces the fluid fill level in the working chamber. As a result, the torque transmission capacity is reduced, and the overload protection capability is enhanced.
• With the rear auxiliary chamber extended and its volume increased, more fluid is stored, which prolongs the refilling time from the rear auxiliary chamber back to the working chamber. This extends the start-up time and reduces the starting torque, making the start-up "softer" and smoother.
• The braking overload factor is greater than the starting overload factor.
• Special attention should be paid to the fact that although the rear auxiliary chamber is extended and the total fluid fill capacity is increased, the effective fluid fill level does not increase significantly. The fluid fill quantity must be strictly in accordance with the specified values in the table. If overfilled, the auxiliary chamber will remain full of fluid during normal operation, thereby losing the ultra-soft start capability.

 Functions and Applications of Torque-Limiting Fluid Coupling

Functions: Provides light-load start-up, overload protection, impact dampening, torsional vibration isolation, load equalization for multi-drive systems, flexible braking, and energy efficiency.

1. The motor starts under near-no-load conditions, reducing starting time and starting current, and minimizing impact on the power grid.
2. It allows starting with the motor's peak torque, thereby enhancing the motor's starting capability and avoiding the "over-sized motor for under-sized load" phenomenon. Compared with rigid drives, it can reduce the motor frame size by at least one grade.
3. It enables the use of economical and low-cost squirrel-cage motors as a replacement for expensive wound-rotor motors.
4. It protects both the motor and the driven machine from damage during overload conditions, reduces failure rates, and extends service life.
5. The starting torque of the driven machine can be controlled, allowing extremely smooth starting and acceleration of heavy-load, high-inertia equipment.
6. As a flexible drive, it cushions impact loads and isolates torsional vibrations.
7. In multi-motor drive systems, it enables sequential start-up of the motors, balanced load sharing, and synchronized operation.
8. It provides wear-free power transmission, with no direct mechanical friction except for bearings and oil seals.
9. It is easy to operate, maintain, and service, with low maintenance costs and a long service life.
10. It features low initial investment and high cost-effectiveness, with energy-saving rates reaching 8–15%.

Applications: Suitable for all types of machinery and equipment that require light-load starting, overload protection, torsional vibration isolation, coordinated multi-motor driving, and flexible braking.

Applications:

Mining – Ball mills, rod mills, crushers, feeders, rotary screens, belt conveyors, excavators, bucket-wheel excavators, hoists, fans, and water pumps.

Electric Power – Coal pulverizers, belt conveyors, bucket-wheel stacker-reclaimers, air preheaters, cable-laying tow trailers, and slag crushers.

Metallurgy – Belt conveyors, steel plate lifting machines, forging feeders, overhead cranes, excavators, bridge cranes, coal pulverizers, gantry cranes, balling machines, straightening machines, and crane cable reeling mechanisms.

Coal – Scraper conveyors, belt conveyors, coal cutters, car dumpers, crushers, ploughs, transfer machines, coal feeders, and screw conveyors.

Petroleum – Mud separators, beam pumping units, oil well pumps, and drilling rigs.

Leather – Dryers, staking machines, drums, and paddle vats.

Construction – Tower cranes, concrete mixers, asphalt mixers, graders, pavers, gantry cranes, brick-making machines, belt conveyors, and crane cable reeling structures.

Building Materials – Ball mills, wet pan mills, crushers, pug mills, drawbenches, mixers, belt conveyors, and plate chain elevators.

Grain, Oil & Food, Pharmaceutical – Mixers, vegetable oil separators, frame saws, belt conveyors, tube bundle dryers, centrifuges, starch separators, cane crushers, buried scraper conveyors, and gantry cranes.

Chemical Industry – Sand mills, coating machines, mixers, dryers, centrifuges, belt conveyors, and pelletizers.

Ports – Belt conveyors, grain conveyors, coal cutters, gantry cranes, tower cranes, and buried scraper conveyors.

Textile – Carding machines (for cotton and wool), rope-making machines, lap winders, lap combiners, and rotor spinning machines.

Amusement – Various rotary amusement rides and ski lift towing machines.

Transportation – Canal lock gate openers, railway foundation excavators, snowplows, automotive plant overhead conveyors, garage door openers, gantry cranes, tower cranes, and subway air conditioning systems.

Posts & Telecommunications – Parcel sorting machines and overhead chain conveyors.

Light Industry – Beer filling machines, rotary advertising lighting fixtures, tobacco dryers, carpet washing machines, dewatering machines, glass crushers, and chain tensioning devices for tinplate printing machines.

Woodworking – Particleboard laying machines, hoisting machines, wood veneer lathes, shredders, and bark separators.

Foundry – Sand mixers, shot blasting machines, and gantry cranes.

Rubber & Plastics Machinery – Injection molding machines, extruders, and rubber mixing mills.