A water-cooled electromagnetic brake of this water cooled brake has a stator accommodating there inside a movably mounted rotor with pole teeth and an excitation winding mounted on a ring with holes, while in the stator lids there are provided toroid-shaped collectors for cooling liquid having circular slots for the introduction of said liquid fed from a gap between the stator and rotor to the collectors, and ports in the lower portion of said collectors for the removal of the cooling liquid.It is an object of the water cooled brake to increase the efficiency of heat transfer by way of ensuring a forced delivery of cooling liquid to heat transfer areas. It is another object of this water cooled brake to reduce the hydraulic resistance to the flow of cooling liquid. It is still another object of the water cooled brake to simplify the overall design of the cooling system. In the accomplishment of said and other objects of the water cooled brake, in the stator of a water- cooled electromagnetic brake there is movably mounted a rotor with pole teeth and an excitation winding arranged on a ring with holes, while in the stator lids there are provided toroid-shaped collectors for cooling liquid having circular slots for the introduction of said liquid fed from a gap between the stator and rotor into the collectors, and ports in the lower portion of the collectors for the removal of the cooling liquid and, according to the water cooled brake, each one of the pole teeth of the rotor is provided with a recess in the central portion thereof located beneath the ring with holes, while the peripheral portion of the tooth has a projection extending into the space of the collectors, the inner edge of said collectors being fashioned as a baffle close to which a labyrinth seal is provided between the rotor and stator.
A liquid cooled friction clutch system in which a pilot tube pump, attached to a release mechanism, has an inlet end disposed in the path of a rotating body of cooling fluid which forms an annular band around the inner periphery of a cover plate assembly. The pump directs fluid from the cover plate through a cooler and then to a fluid reservoir from which it is directed through a control valve to flow across the friction facings of a driven member. Valve means in said system limits the fluid pressure to a predetermined maximum irrespective of the engine speed, thus limiting the flow through the system to a predetermined value. With conventional clutches, the heat generated during heavy-duty operations soon results in severely limited clutch life due to facing break down. Certain modifications such as ventilating the bell housing and increasing the axle ratio extend clutch life, but it still falls far below an acceptable level. It uses water and oil cooling systems.
