YOXIIA Connection Dimension Parameters for Split-Type Torque-Limiting Fluid Couplings

Structural Features:

•  Its structural feature is that a rigid coupling is provided at the input end and an elastic coupling at the output end. It is essentially an outer-impeller-driven brake-wheel type coupling with the brake wheel removed.
• The greatest advantage of the split-type coupling lies in its convenient installation and removal. The coupling body can be detached from the input and output half-couplings. The two end couplings can then be mounted onto the motor shaft and the reducer shaft respectively using the heating method. Finally, the coupling body is assembled onto the rigid coupling at the input end and engaged with the output coupling via the elastic element. This simplifies the installation and removal process and ensures that the coupling is not damaged during assembly and disassembly.

Selection Notes:

• Since the split-type coupling is equipped with an elastic coupling at the output end, its axial length is increased. Therefore, the connection dimensions of the YOX type are not applicable; however, the connection dimensions of the YOXIIZtype can be used.

Installation and Removal Procedure and Precautions:

• Remove the input-end rigid coupling from the coupling body;
• Remove the output-end coupling from the coupling body;
• Mount the input-end rigid coupling onto the motor shaft using the heating method;
• Mount the output half-coupling onto the reducer shaft using the heating method;
• Install the coupling body onto the rigid coupling already mounted on the motor shaft, ensuring accurate positioning;
• Move the motor with the coupling to engage it with the output half-coupling via the elastic element;
• Align the motor and the reducer properly;
• For disassembly, follow the above steps in reverse order.

Precautions:

• When installing the coupling body, proper alignment must be ensured. The bolts shall be tightened symmetrically to prevent the coupling from being mounted skewed.
• The mounting positions of the motor and the reducer must be properly aligned to ensure concentricity of their rotational centers.
• During installation and removal, care must be taken not to damage the wire thread inserts in the bolt holes.

 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.