Antirotational and axial force component in a pusher seal assembly and tool for wear installation
AssigneeEG&G Sealol, Inc.
InventorJan E. Sandgren
Life of this patent
Estimating the term…
Abstract
In a split mechanical face seal including means for biasing one split seal face against another, an annular, inwardly radially extending leaf spring, which may also be split, is mounted at an outer diameter thereof to the stationary seal housing. A radially inward end of the spring is received in a notch in the stationary seal ring axially remote from the sealing face. The spring end biases the seal face toward a non-resiliently mounted rotating face and retains the stationary sealing face against rotation. A tool in the form of a U-shaped collar is provided for holding two split ring seal halves for preventing grinding motion at their mating surfaces during installation.
Claims20
A pusher seal assembly kit for sealing an annular gap between a housing and a rotatable shaft, the assembly kit comprising:
- a rotatable seal member for mounting on the rotatable shaft, the rotatable seal member having a sealing surface;
- a base member for mounting on the housing in a fixed position proximate the annular gap;
- a non-rotatable seal member for positioning between the base member and the rotatable shaft so as to encompass a circumferential surface of the rotatable shaft, the non-rotatable seal member being circumferentially adjustable and having a seal face configured for sealing engagement with the sealing surface of the rotatable seal member and a contact surface spaced from the seal face, the contact surface including at least one notch formed therein;
- and
- a spring member attached to the base member, the finger spring member having at least one finger element extending from the base member toward the rotatable shaft when the base member is fixed into position to bear against the contact surface for biasing the non-rotatable seal member axially along the rotatable shaft toward the rotatable seal member, wherein the non-rotatable seal member circumferentially adjusts for self-aligning engagement of the notch with the finger element to prevent rotation of the non-rotatable seal member.
A method of sealing an annular gap between a housing and a rotatable shaft, the method comprising the steps of:
- mounting a rotatable seal member having a sealing surface on the rotatable shaft;
- fixing a base member on the housing in a fixed position proximate the annular gap;
- positioning a non-rotatable seal member between the base member and the rotatable shaft so as to encompass a circumferential surface of the rotatable shaft, wherein the non-rotatable seal member is circumferentially adjustable and includes a seal face and a contact surface spaced from the seal face with at least one notch formed therein, the non-rotatable seal member being positioned so the seal face is aligned for sealing engagement with the sealing surface of the rotatable seal member;
- and
- attaching a spring member having at least one finger element to the base member, the finger spring member being attached so the finger element extends from the base member toward the rotatable shaft to bear against the contact surface for biasing the non-rotatable seal member axially along the rotatable shaft toward the rotatable seal member, wherein the non-rotatable seal member circumferentially adjusts for self-aligning engagement of the notch with the finger element to prevent rotation of the non-rotatable seal member.
Dependencies are inferred from the claim text.