WIND TURBINE MECHANICAL BRAKE

• US 20130056314A1
• Filed: 01/26/2011
• Published: 03/07/2013
• Est. Priority Date: 02/04/2010
• Status: Active Grant

• Current Assignee: Siemens Gamesa Renewable Energy Innovation & Technology SL (Siemens AG)
• Original Assignee: Angel Fernandez Garcia
• Inventors: Diaz De Cerio Garcia De Mendaza, Cesar, Fernandez Garcia, Angel
• Granted Patent: US 8,864,464 B2
• Time in Patent Office: Days
• US Class Current: 188/71.1
• CPC Class Codes: F03D 7/0248 by mechanical means acting on the power train
• CPC Class Codes: F05B 2260/902 using frictional mechanical forces
• CPC Class Codes: F05B 2270/107 to cope with emergencies
• CPC Class Codes: F16D 55/02 with axially-movable discs or pads pressed against axially-located rotating members
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

The mechanical brake comprises a double disc (D1 and D2) rotating with the transmission shaft and some brake calipers (P1 and P2) that apply friction on the disc when activated electrically, hydraulically or pneumatically. The brake is characterized because its high-speed shaft (Ea) is equipped with a drive train, adapting its diameter to some dimensions marked by the existing space and anchoring the brake calipers directly to the cover of the gearbox (M).

The mechanical brake thus constituted is capable of braking with the pitch actuator in power position, in initial conditions of nominal power and at nominal average wind speed for an installation below 1 MW.

Claims

1. Wind turbine mechanical brake that comprises a disc type element that rotates with the transmission shaft and braking calipers that rub against the disc when activated electrically, hydraulically or pneumatically, characterized because it is located on the high-speed shaft and formed by at least two discs with continuous braking surface and with at least two calipers applied one on each disc, being said calipers anchored on the gearbox chassis.

2. Wind turbine mechanical brake according to the first^t claim, characterized because the unit consisting of the discs and braking calipers is located after the gearbox, as close to it and as far from the generator as possible.

3. Wind turbine mechanical brake according to the first claim, characterized because the braking calipers are anchored to the gearbox chassis by fastening elements such as threaded bolts.

4. Wind turbine mechanical brake according to the first claim, characterized because the brakes have dimensions of between 20 and 30 mm in thickness, preferably 25 mm in thickness, and between 550 and 700 mm in diameter, preferably 610 mm in diameter.

5. Wind turbine mechanical brake according to the first claim, characterized because the temperature reached in the discs as a whole during braking with the pitch actuator in power position (without feathering), under initial conditions of nominal power and at nominal average wind speed for the installation is 60% less than the temperature in a simple disc type brake.