Method of detecting a leak past a dynamic seal in aircraft landing gear

摘要

A leak detection method for detecting a leak past a dynamic seal in aircraft landing gear (100) comprising: a strut (10); a rod (20) slidably mounted in the strut; and a bearing (70) fitted to an end (11) of the strut to guide the rod (20). The bearing includes a bushing (50) having a seal (62) arranged to rub against the rod (20) to provide sealing between the strut and the rod, defines a fluid chamber (2), and a stop nut (40) for preventing the bushing from moving relative to the strut. The method includes a step of installing a test nut (3) without a wiper seal in the place of the stop nut (40), the step of putting the hydraulic fluid in the landing gear under pressure, and the step of verifying the existence of a leak of hydraulic fluid on the outside surface (22) of the rod (20).

主权项

1. A leak detection method for detecting a leak past a dynamic seal in aircraft landing gear (100) comprising at least:
a strut (10); a rod (20) slidably mounted in the strut; and a bearing (70) fitted to an end (11) of the strut to guide the rod (20), said bearing including at least one bushing (50) having at least one dynamic seal (62) arranged to rub against the rod (20) in order to provide sealing between the strut and the rod, thereby defining a chamber (2) filled with hydraulic fluid between the strut and the rod, and a stop nut (40) for preventing the bushing from moving in translation relative to the strut and provided with at least one wiper seal (64) arranged to wipe hydraulic fluid on the rod; the method being characterized in that it includes a step of installing a test nut (3) without a wiper seal in the place of the stop nut (40), a step of putting the hydraulic fluid in the landing gear under pressure, and a step of verifying the existence of a leak, if any, of hydraulic fluid on an outside surface (22) of the rod.