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US 5,088,742 AGranted
Hydraulic seal and method of assembly
AssigneeROLLS-ROYCE plc
InventorRonald Catlow
Life of this patent
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AssigneeROLLS-ROYCE plc
InventorRonald Catlow
Estimating the term…
A radially inwardly extending annular flange (47) is integral with an annular portion (26) of an outer shaft (23). The annular flange (47) forms an oil weir in operation. A radially outwardly extending annular sealing member (56) is mounted on an annular portion (48,50) of an inner shaft (39). The shafts (23,39) are arranged to rotate relative to each other. The outer diameter of the sealing member (56) is greater than the inner diameter of the annular flange (47). In order to introduce or remove the sealing member (56) from the hydraulic seal, past the annular flange (47), the sealing member (56) is axially split by a circumferentially extending spiral to define axially overlapping portions (56A,56B). The sealing member (56) is parted axially to form a clearance and a portion of the annular flange (47) is located in the clearance. The sealing member (56) is rotated about its axis when the slope of the spiral is parallel to the annular flange (47 ).
A hydraulic seal comprising an inner annular member and an outer annular member, the outer annular member being positioned coaxially around the inner annular member, at least the outer annular member being rotatable, the outer annular member having an integral annular flange extending radially inwardly to define in operation, a lubricant weir, the inner annular member including an annular sealing member extending radially outwardly to define, in operation, a lubricant seal, the outer diameter of the annular sealing member being greater than the inner diameter of the annular flange, the annular sealing member is a spiral ring defining axially adjacent portions, means to bias the axially adjacent portions of the spiral ring together, the axially adjacent portions of the spiral ring are axially partable to allow the annular sealing member to be introduced into or removed from the hydraulic seal past the annular flange on the outer annular member.
A method of assembling a hydraulic seal comprising the steps of:
Dependencies are inferred from the claim text.