Device for reducing the idling losses in hydrodynamic brakes
US5228544A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1992 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Feb 14, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D57/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a hydrodynamic brake (1), in order to reduce the ventilation losses, adjustable baffles (2, 20) are situated between a rotor (3) and a stator (4). During idling, when oil has been evacuated from the brake (1), one or more baffles (2, 20) of angular cross section in the outer area of the toroidal chambers (31, 41) separate the chambers via a radially inward projecting annular leg (21), a leg cylindrically situated in an axial direction abutting against the inner wall (52) of a chamber (5). During operation of the brake, that is, when the hydrodynamic brake (1) is filled with oil, the radially inward projecting leg (21) is located with its front edge (29) behind the toroidal chambers (31, 41). When only one baffle (20) covering the entire periphery of the outer area of the toroidal chambers (31, 41) is installed, slits (23, 28) are disposed in the radially inward projecting annular leg (21) to obtain the adequate elasticity. The actuation in the radially outward and inward end positions is obtained via an actuation device (6, 60), a specially advantageous design being a piston-cylinder unit (60) having two pistons (61) and a driver device on the pistons and drivers on the baffle (…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.