SAFETY BRAKE

• US 20140147280A1
• Filed: 06/26/2012
• Published: 05/29/2014
• Est. Priority Date: 07/16/2011
• Status: Abandoned Application

• Current Assignee: SUCO Robert Scheuffele GmbH & Co. KG
• Original Assignee: SUCO Robert Scheuffele GmbH & Co. KG
• Inventors: Kowatsch, Ulrich
• Application Number:
  US14/232,439
• Publication Number:
  US 20140147280A1
• Time in Patent Office: Days
• US Class Current: 416/169.R
• CPC Class Codes: F03D 7/0244 for braking
• CPC Class Codes: F16D 2121/32 using shape memory or other thermo-mechanical elements
• CPC Class Codes: F16D 2127/001 for automatic or self-acting brake operation
• CPC Class Codes: F16D 2127/002 speed-responsive
• CPC Class Codes: F16D 2129/04 Mechanical
• CPC Class Codes: F16D 2129/14 Shape memory or other thermo-mechanical elements
• CPC Class Codes: F16D 55/02 with axially-movable discs or pads pressed against axially-located rotating members
• CPC Class Codes: F16D 63/00 Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
• CPC Class Codes: F16D 63/004 comprising a rotor engaged both axially and radially by braking members, e.g. combined drum and disc brakes
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

The invention relates to a safety brake (12) for stopping a rotating device (38) in response to overheating. For this purpose, the safety brake (12) encompasses an expansion element (40), which, in the event of a heat-up, presses a first brake element (44) against a second brake element (48). After cool-down of the expansion element (40), the latter automatically releases the safety brake (12) again.

Claims

1. A safety brake (12) for a device (38), in particular for wind turbines (10), which rotates with respect to a stationary bearing unit (36), characterized in that the bearing unit (36) encompasses an expansion element (40), at which a first brake element (44) is arranged or embodied, which can be pressed against a second brake element (48) of the device (38) by means of an expansion of the expansion element (40) in response to heat-up of the expansion element (40).

2. The safety brake according to claim 1, characterized in that the first brake element (44) can be moved against the force of a spring element (46).

3. The safety brake according to claim 1, characterized in that the second brake element (48) encompasses a brake disk or a brake ring.

4. The safety brake according to claim 1, characterized in that the second brake element (48) is arranged or embodied at a shaft (34) of the device (38).

5. The safety brake according to claim 1, characterized in that provision is made for a thermal bridge (50) between the second brake element (48) and the expansion element (40).

6. The safety brake according to claim 1, characterized in that provision is made in the area of the expansion element (40) for a centrifugal brake (14) between bearing unit (36) and device (38), wherein the safety brake (12) is provided as additional brake for the centrifugal brake (14).

7. The safety brake according to claim 6, characterized in that the centrifugal brake (14) encompasses at least one brake shoe (20), which can be rotated about an axis of rotation (26) and which can be pressed against a brake drum (22) and which. is connected to a weight (16), which is movably provided outside of the brake drum (22).

8. The safety brake according to claim 7, characterized in that the weight (16) is connected to the brake shoe (20) by means of a traction mechanism (18).

9. The safety brake according to claim 8, characterized in that the traction mechanism (18) is movably guided in a weight guide (24).

10. The safety brake according to claim 9, characterized in that the weight guide (24) is embodied in a rotor blade of a wind turbine.