Browse Prior Art Database

Seal Ring Tester

IP.com Disclosure Number: IPCOM000061749D
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Harvilchuck, JM: AUTHOR [+2]

Abstract

A device has been developed for testing integrity of seal rings by applying a constant displacement to the ring section while it simultaneously undergoes a cycling test. The tester measures springback force as a function of ring excursion with ring cycling simulating dynamic/thermal cycling conditions. A C-ring seal ring shown at 1 (Fig. 1) is often used to provide a hermetic seal when compressed by a force 2 applied to contact material 3. The ring flexes under the loading and exerts a springback force 4 which maintains the seal. The force is a sensitive parameter in seal integrity with a higher springback force typically leading to a better seal. The C-ring section to be tested, shown in Fig. 2, is placed between contact material 3, affixed to the tester transducer 5, and vertical actuator 8.

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Seal Ring Tester

A device has been developed for testing integrity of seal rings by applying a constant displacement to the ring section while it simultaneously undergoes a cycling test. The tester measures springback force as a function of ring excursion with ring cycling simulating dynamic/thermal cycling conditions. A C- ring seal ring shown at 1 (Fig. 1) is often used to provide a hermetic seal when compressed by a force 2 applied to contact material 3. The ring flexes under the loading and exerts a springback force 4 which maintains the seal. The force is a sensitive parameter in seal integrity with a higher springback force typically leading to a better seal. The C-ring section to be tested, shown in Fig. 2, is placed between contact material 3, affixed to the tester transducer 5, and vertical actuator 8. An assembly 7 holds a fixture 9 to which the transducer is attached. A screw bolt 6 is used to apply the initial compressive force and hold the displacement constant. Force relaxation is used as the sensitive indicator of seal ring wearout. The C-ring sections being tested are compressed to a constant displacement. The springback force is measured by the high stiffness, high sensitivity force transducers. The tester is mechanically balanced so that it is capable of testing several samples simultaneously. It is possible to obtain almost an exact approximation of the test to a real wearout mechanism while detecting small changes in force relaxation or cyclin...