Uninterruptible oil supply in planetary system
A planetary carrier includes a journal bearing for supporting a planetary gear. The journal bearing receives lubricant to produce a lubricant film to support gear loads. A torque frame is attached to the carrier housing to transmit torque and to prevent twisting of the carrier housing. The torque frame includes several lubricant communication passages to provide lubricant to each of the separate journal bearings. Each of the lubricant communication passages includes an accumulator for storing lubricant during normal operation. The accumulator stores a desired amount of lubricant to provide lubricant to the adjacent journal bearing for the interim period between primary system stoppage and reestablishment of lubricant flow by a secondary system.
1. A planetary gear train assembly comprising:
a carrier housing supporting planetary gears;
a torque frame attached to said carrier housing for preventing torque twisting of said carrier housing, wherein said torque frame includes a boss portion, said boss portion including an outlet communicating lubricant with said carrier housing;
a lubricant passage for supplying lubricant through said torque frame and carrier housing to at least some of said planetary gears; and
an accumulator disposed within said torque frame for storing a desired amount of lubricant in fluid communication with said lubricant passage.
2. The assembly as recited in claim 1 , wherein said accumulator includes an inlet and an outlet both communicating with said lubricant passage.
3. The assembly as recited in claim 2 wherein said inlet includes an inlet orifice and said outlet includes an outlet orifice, said outlet orifice restricting flow of lubricant from said accumulator into said lubricant passage.
4. The assembly as recited in claim 1 , wherein said torque frame includes a hub portion, said hub portion including an inlet for lubricant.
5. The assembly as recited in claim 4 , wherein said accumulator is disposed radially outward of said inlet.
6. The assembly as recited in claim 1 , including a bypass passage for directing lubricant around said accumulator.
7. The assembly as recited in claim 6 , including an outlet orifice for regulating the flow of lubricant out of said accumulator and into the lubricant passage.
8. The assembly as recited in claim 1 , wherein said torque frame includes a plurality of spokes extending radially outward from a hub, said accumulator disposed within at least one of said plurality of spokes.
9. The assembly as recited in claim 1 , wherein said torque frame includes a plurality of accumulators disposed in a corresponding plurality of spokes extending radially outward from a hub.