Couplings for Cooling Tower Applications

Model HSB Backstopping Clutch

Formsprag

HSB (High Speed Backstop) clutches are used on cooling tower fan drives to prevent rotation in the opposite direction from the normal driving direction. When the fan drive is off, wind pressure from other fans or ambient breezes can apply sufficient force to rotate fan blades in the opposite direction.

Model RSCI Backstopping Clutch

Stieber Clutch

Type RSCI is a centrifugal lift off sprag type freewheel with the inner race rotating. Only the inner race is designed for freewheeling. Primarily designed as a backstop, it can be also used as an overrunning clutch in crawl drives.

TB Wood’s couplings are industry proven and used throughout the world. Form-Flex® disc type couplings attached to any of our TrueTube™ composite tubes, creates a superior designed cooling tower coupling. As an option, for applications 50HP and under, the HD4CS cooling tower coupling is an excellent high misalignment all-composite cooling tower coupling.

Our Form-Flex all metal disc type couplings allow you the option of close coupled or spacer type applications with many options for corrosion resistance. The Dura-Flex® coupling is a patented design with an improved shoe-to-element bond and exceptional hydrolytic resisting properties extending its working life. An industry leader in elastomeric type couplings, the Sure-Flex® Plus is a no maintenance, dependable coupling not affected by abrasives, dirt or moisture.

High Strength Stainless Steel Flex Disc

High Strength Stainless Steel Flex Disc

  • High torsional stiffness
  • No lubrication required
  • No moving parts
  • Zero backlash
  • Wide Temperature Range

Induced draft cooling tower drive systems are usually designed with a motor, gearbox, and fan located at the top of the cooling tower. The atmosphere inside the tower is hot and humid. Placing a motor inside the tower under these conditions can quickly deteriorate its performance.

Using a TB Wood’s floating shaft coupling, the motor is located on the outside of the stack and away from the corrosive airflow. It spans the gap between the motor and gearbox reducer shaft through various coupling designs to meet your cooling tower application.

TrueTube composites are high-strength, lightweight torque tubes for long span drive shafts. These tubes are filament wound carbon or glass fiber construction which are oven-cured under precision controlled conditions for consistent quality.

All TrueTube composites include our exclusive barrier layer wound into the structure of each tube providing UV protection and giving the TrueTube its unique, smooth appearance, plus protection for the working structure of the tube from damage during handling and installation.

Longer Spans

  • Composite couplings span up to 6 meters.
  • No high maintenance center support bearings.
  • High stiffness-to-weight ratio increasing critical speed.

Lighter Weight

  • TrueTube™ drive shafts weigh up to 80% less than comparable steel driveshafts

Design Flexibility

  • May be custom designed to meet your requirements for torsional stiffness, critical speed or torque capacity.
  • Can tune torsional or lateral critical speeds out of a machine system.