Applications / Spring Applied Disc Brake

 

Disc springs also called Belleville washers are mainly used in hydraulic or pneumatic caliper disc brakes to provide brake clamping force in cranes, mining, conveyer system and manufacturing where automatic engagement is required upon power loss.

 

Caliper disc brakes utilize stacks of disc springs to generate force, which is then released by air or hydraulic pressure.

 

Figure 1 shows schematically a spring-applied band brake formed by disc springs or Belleville washers where, depending on the manual or hydraulic release, the piston compressing them is displaced axially by the operator turning the brake handle or by the hydraulic pressure acting on the oil chamber respectively.

 

To release the brake once the winch is engaged, the operator further decompresses spring against the piston by turning the brake handle anticlockwise.

 

To apply the brake from the released condition, the operator turns the brake handle clockwise.

 

Figure 1. Spring-applied brake (disc spring or Belleville washers).

Figure 2 Hydraulic Spring-applied disc brake (disc spring or Belleville washers)

Figure 2 shows a hydraulic spring-applied caliper disc brake. This brake requires hydraulic pressure for disc release. Braking force is provided by a stack of Belleville washers or disc springs. Belleville washers are capable of storing enormous force. When the brake is pressurized a piston moves to compress the Belleville spring washer stacks, thus releasing the disc.

Material Available: ●Carbon Steel:      51CrV4 (1.8159 / 6150) ●SUS300 Series Stainless Steel:      SUS301 (1.4310)      SUS304 (1.4301)      SUS316 (1.4401) ●Precipitation Hardening Stainless Steel:      17-7PH Stainless Steel (1.4568) ●Thermally Stable Stainless Steel:      X22CrMoV12 1 (1.4923) ●High Temperature Stainless Steel:      Inconel 718 (2.4668)      Inconel 750 (2.4669)      Nimonic 90 (2.4969)