Hydraulic brake comprising a safety function

摘要

A braking device for braking a moving mass includes a movably guided coupling member for pressing a brake lining against a braking surface, a brake cylinder, filled with a hydraulic liquid, a brake piston which is movable inside the brake cylinder and which is connected to the coupling member. At least one hydraulic line can be connected to the brake cylinder. The device ensures the moving masses to be reliably decelerated. For that purpose, a fluidic-mechanical safety brake device is used to connect the brake cylinder to the one or more hydraulic lines.

主权项

1. A device for braking or decelerating a moving mass, comprising:
a movably guided coupling element for pressing a brake lining against a braking surface; a brake cylinder filled with hydraulic fluid; a brake piston movably disposed in said brake cylinder and connected to said coupling element; at least one hydraulic line fluidically connectible with said brake cylinder; fluid-mechanical safety braking means for connecting said brake cylinder to said at least one hydraulic line, said fluid-mechanical safety braking means including:
a mechanically controlled brake valve in said at least one hydraulic line for setting a hydraulic pressure in the brake cylinder,load correction means configured to apply a set point force, which is dependent on the mass to be decelerated, to said brake valve,a sliding element configured to communicate through an hydraulic regulating line with said at least one hydraulic line or with said brake cylindersaid brake valve being an analog slider control valve including said sliding element, said sliding element configured to be acted on by said set point force; a pressure transducer to be attached oaf a e of the mass to be decelerated, said pressure transducer having a supporting cylinder filled with hydraulic fluid and communicating with said brake cylinder via said at least one hydraulic line, said pressure transducer having a supporting piston dividing said supporting cylinder into a supporting chamber and a supporting return chamber; and regulating means acting on said brake valve to minimize a difference value between a predefined set point value and an absolute value of a difference in pressure between a hydraulic pressure in said supporting chamber and a hydraulic pressure in said supporting return chamber; wherein said load correction means is configured to cause an actual force to be applied to said sliding element of said analog slider control valve, the actual force is dependent on the pressure in the hydraulic regulating line, and the set point force counteracts the actual force; and wherein said fluid-mechanical safety braking means is configured to initiate a regulated braking operation upon a determination that said regulating means has failed.