Boss with internal bearing
A boss configured for attachment to a pressure vessel includes a first bore therein and a bearing disposed at least partially within the first bore. A system for supporting a pressure vessel on a vessel mount includes a boss, a bearing, and an attachment element. The boss is attached to the pressure vessel and has a first bore therein. The bearing is disposed at least partially within the first bore and has a second bore therethrough. The attachment element is configured to be affixed to the vessel mount, wherein a portion of the attachment element extends through the second bore and is slidable within the first and second bores substantially along a longitudinal axis of the pressure vessel. A method is described for supporting a pressure vessel on a vessel mount.
1. A mounting assembly configured for attachment to a pressure vessel in alignment with a central, longitudinal axis of the pressure vessel, the mounting assembly including a boss and a pin:
the boss including:
a tubular neck that is configured to project outwardly from an interior of the pressure vessel;
a first bore in the neck having a closed end such that the first bore does not communicate with the interior of the pressure vessel;
a spherical bearing disposed at least partially within the first bore and including a second bore therethrough;
wherein the first bore includes a surface that is at least partially spherical and corresponds to a first portion of an outer spherical surface of the bearing; and
a retainer disposed between a second portion of an outer spherical surface of the bearing and a portion of the first bore; and
the pin extending through the second bore and into the first bore, the pin configured for axial motion within the first bore and along the longitudinal axis.
2. The boss of claim 1 wherein the first bore and the second bore have co-axial longitudinal axes.
3. The boss of claim 1 wherein the retainer includes an inner surface that is at least partially spherical and corresponds to the second portion of the outer spherical surface of the bearing.
4. The boss of claim 1 wherein:
the first bore includes a shoulder; and
the retainer includes an interior end surface configured to abut the shoulder.
5. The boss of claim 1 wherein the retainer is annular.
6. The boss of claim 1 wherein:
the first bore includes a groove; and
the retainer is configured to at least partially fit into the groove.
7. A system for supporting a pressure vessel on a vessel mount, the system including:
a boss configured for attachment to the pressure vessel in alignment with a central, longitudinal axis of the pressure vessel, the boss having a tubular neck that is configured to project outwardly from an interior of the pressure vessel, the neck having a first bore therein having a closed end such that the first bore does not communicate with the interior of the pressure vessel;
a spherical bearing disposed at least partially within the first bore and having a second bore therethrough, wherein the first bore includes a surface that is at least partially spherical and corresponds to a first portion of an outer spherical surface of the bearing;
an attachment element configured to be affixed to the vessel mount, wherein a portion of the attachment element extends through the second bore and is slidable within the first and second bores substantially along a longitudinal axis of the pressure vessel; and
a retainer disposed between a second portion of an outer spherical surface of the bearing and a portion of the first bore.
8. The system of claim 7 wherein the retainer includes an inner surface that is at least partially spherical and corresponds to the second portion of the outer spherical surface of the bearing.
9. The system of claim 7 wherein:
the first bore includes a shoulder; and
the retainer includes an inner end surface configured to abut the shoulder.
10. The system of claim 7 wherein the retainer is annular.
11. The system of claim 7 wherein:
the first bore includes a groove; and
the retainer is configured to at least partially fit into the groove.
12. The system of claim 7 wherein the attachment element is configured as a pin.
13. A method for supporting a pressure vessel having a boss on a vessel mount, wherein the boss is attached to the pressure vessel in alignment with a central, longitudinal axis of the pressure vessel, the boss having a tubular neck that is configured to project outwardly from an interior of the pressure vessel, the neck having a first bore therein, a spherical bearing disposed at least partially within the first bore and having a second bore therethrough, wherein the first bore includes a surface that is at least partially spherical and corresponds to a first portion of an outer spherical surface of the bearing, the method including:
inserting a first portion of an attachment element through the second bore and a portion of the first bore, wherein the first bore has a closed end such that the first bore does not communicate with the interior of the pressure vessel;
mounting a second portion of the attachment element to the vessel mount; and
passing the first portion of the attachment element through a retainer that keeps the bearing at least partially within the first bore;
wherein the attachment element is configured for axial motion within the first bore and along the longitudinal axis.