Oil level indicator for rotary wing aircraft transmission

摘要

A fluid level sensor for determining an amount of first fluid in a system is provided including a first substantially transparent sight glass mounted outside and fluidly coupled to a portion of the system. A level of first fluid in the first sight glass is indicative of the amount of first fluid in the system. A second substantially transparent sight glass has an independent closed loop containing a second fluid. The second sight glass is positioned adjacent outside the system. A plane of the second sight glass is arranged adjacent to a pivot point of the first fluid within the system. A level of second fluid in the second sight glass is indicative of the amount of first fluid corresponding to normal operation of the system. A comparison of the level of first fluid in the first sight glass and the level of second fluid in the second sight glass indicates if the amount of first fluid in the system requires adjustment.

主权项

1. A fluid level sensor for determining an amount of a first fluid in a system, the fluid level sensor having a pivot point, the sensor comprising:
a first substantially transparent sight glass distinct from and mounted outside the system, the first substantially transparent sight glass being fluidly coupled to the first fluid in the system such that a level of first fluid in the first sight glass is indicative of the amount of the first fluid in the system; and a second substantially transparent sight glass having an independent closed loop containing a second fluid, the second sight glass being positioned outside the system such that a plane extending through the first sight glass and the second sight glass includes the pivot point, wherein a comparison of the level of first fluid in the first sight glass and a level of second fluid in the second sight glass indicates if the amount of first fluid in the system requires adjustment independent of an orientation of the system and if the level of first fluid and the level of second fluid are substantially identical, no adjustment of the amount of first fluid in the system is needed.