LUBRICATING DEVICE HAVING A BYPASS VALVE

摘要

The invention relates to a lubricating device (5) comprising a bypass valve (9) having an inlet (IN) connected to a supply circuit (7), a first outlet (M) capable of being connected to elements to be lubricated, and a second outlet (BP) connected to a bypass circuit (8). The bypass valve (9) comprises a valve (14) housed in a cavity (15) of the bypass valve (9), dividing the cavity (15) into a first chamber (16) and a second chamber (17). The first chamber (16) is connected to the inlet (IN), and the valve (14) is capable of sliding between a first position and a second position in accordance with difference ?? in pressure between the two chambers (16, 17), wherein an actuator (26) returns the valve (14) toward the first position thereof. In the first position, a fluid passage from the first chamber (16) to the second outlet (BP) is open, and a fluid passage from the first chamber (16) to the first outlet (N) is closed. In the second position, the fluid passage from the first chamber (16) to the first outlet (N) is open, and the fluid passage from the first chamber (16) to the second outlet (BP) is closed. At least in the second position, the valve (14) substantially sealingly separates said first and second chambers (16, 17), while the second chamber (17) remains in fluid communication with the second outlet (BP).