Railway hydraulic stabilizer
A hydraulic stabilizer for a railway freight car truck, the truck having a bolster and side frames each respectively supporting at least one railway axle/wheel set. The hydraulic stabilizer being contained within the area of the spring set between the bolster and the side frame, and having a working cylinder and piston contained within a housing. The device having a rod seal affixed intermediate said cylinder and said piston; and an oil seal affixed intermediate said cylinder and said piston. The oil seal having at least two lip profiles extending radially inward to said cylinder.
1 . A hydraulic stabilizer for a railway freight car truck, the truck comprising a bolster and side frames supporting at least one railway axle/wheel set, the hydraulic stabilizer being contained within the area of the spring set between the bolster and an side frame, said hydraulic stabilizer comprising:
a housing;
said housing having a hydraulic fluid reservoir;
a hydraulic cylinder at least partially contained within said housing;
a working piston generally aligned within said cylinder having a piston rod for axial movement within said cylinder to dampen relative movement between said bolster and said side frame;
an oil seal affixed intermediate said cylinder and said piston rod; and
said oil seal having at least two lip profiles extending radially inward of said cylinder.
2 . The hydraulic stabilizer for a railway freight car truck of claim 1 further comprising said seal having an outer lip seal disposed on an outer surface of said seal generally radially opposite one of said two lip profiles.
3 . The hydraulic stabilizer for a railway freight car truck of claim 2 , further comprising said seal having a resilient expander.
4 . The hydraulic stabilizer for a railway freight car truck of claim 3 having an anti-extrusion ring positioned on said seal axially outward of said two lip profiles.
5 . The hydraulic stabilizer for a railway freight car truck of claim 1 further including a rod wiper in said cylinder axially outward of said seal.
6 . The hydraulic stabilizer for a railway freight car truck of claim 5 further comprising said wiper having a resilient lip extending upward and inward; and said wiper including a J-shaped reinforcing member.
7 . The hydraulic stabilizer for a railway freight car truck of claim 6 wherein said reinforcing member includes a hook portion extending into said wiper and a vertical portion of said J-shaped reinforcing member positioned radially outward of said lip and circumferential about said wiper.
8 . The hydraulic stabilizer for a railway freight car truck of claim 7 wherein said wiper includes a valley in said wiper separating said lip from said reinforcing member.
9 . The hydraulic stabilizer for a railway freight car truck of claim 4 further including a rod wiper in said cylinder axially outward of said seal.
10 . The hydraulic stabilizer for a railway freight car truck of claim 9 further comprising said wiper having a resilient lip extending upward and inward; and said wiper including a J-shaped reinforcing member.
11 . The hydraulic stabilizer for a railway freight car truck of claim 10 wherein said reinforcing member includes a hook portion extending into said wiper and a vertical portion of said J-shaped reinforcing member positioned radially outward of said lip and circumferential about said wiper.
12 . The hydraulic stabilizer for a railway freight car truck of claim 11 wherein said wiper includes a valley in said wiper separating said lip from said reinforcing member.
13 . The hydraulic stabilizer for a railway freight car truck of claim 5 wherein said piston rod has a finish generally equal to the range of #2 and #3 RMS.