Wrap element and tip seal for use in fluid apparatus of the scro

Details Wrap element and tip seal for use in fluid apparatus of the scro Wrap element and tip seal for use in fluid apparatus of the scro

1981-02-09

1983-11-15

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418142, 277 961, 277204, F01C 102, F01C 1908, F16J 1534

Patent

active

044153171

ABSTRACT:
A wrap element and tip seal are disclosed for use in fluid apparatus of the scroll type which include a wrap element having a groove disposed within its tip surface of spiroidal configuration generally conforming to that of the wrap element. A tip seal is disposed within the groove and comprises a plurality of strips of material disposed at least partially within the groove and arranged in side-by-side relationship at least partially across the width of the groove, each said strip extending along a longitudinal axis about the spiroidal configuration of the groove. By fabricating the seal from a plurality of strips of material, the necessity for expensive machining operations is obviated while a seal is provided which is relatively flexible in a radial direction as to accommodate the precise groove shape, while remaining relatively inflexible in an axial direction so as to provide the desired sealing characteristics. A variety of back-up means are disclosed for imposing a force upon the plurality of strips in an axial direction away from the wrap element while permitting movement thereof in an axial direction, thereby providing a desired sealing force while also affording a certain amount of axial compliance within the fluid apparatus.

REFERENCES:
patent: 2583957 (1952-01-01), Marvin
patent: 2846280 (1958-08-01), Berg
patent: 3861838 (1975-01-01), Lamm
patent: 3994636 (1976-11-01), McCullough et al.
patent: 4080120 (1978-03-01), Eiermann
patent: 4199308 (1980-04-01), McCullough

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