Patent Application
20190024828
The present disclosure relates to a metal to metal wedge ring seal.
This section provides background information related to the present disclosure which is not necessarily prior art.
When connecting adjacent sections of fluid flow conduits or vessels, seal rings are typically interposed at the interface of adjacent connecting conduits or vessel portions which are then bolted or clamped together. Most known seal rings and joints work, to a greater or lesser extent, when the pressure within the conduit, pressure vessel or the like is considerably greater than the ambient pressure outside of the conduit, pressure vessel or the like so that the seal or joint is pressure energized.
This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.
A seal assembly according to the present disclosure includes an outer member defining a bore and an inner member received in the bore of the outer member and one of the outer member and the inner member defining a shoulder portion. An inner circular cross-section metallic ring member and an outer circular cross-section metallic ring member are disposed between the outer member and inner member and against the shoulder portion. A wedge member engages the inner circular cross-section metallic ring member and the outer circular cross-section metallic ring member for applying an axial force against each of the inner and outer circular cross-section metallic ring members in a direction toward the shoulder portion and for applying a radially outer force against the outer circular cross-section metallic ring member and for applying a radially inner force against the inner circular cross-section metallic ring member.
Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.
Example embodiments will now be described more fully with reference to the accompanying drawings.
Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “comprising,” “including,” and “having,” are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being “on,” “engaged to,” “connected to,” or “coupled to” another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly engaged to,” “directly connected to,” or “directly coupled to” another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
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The mechanical advantages provided by the seal designs of the present disclosure create very high surface contact pressures when axial force is applied to the wedge member due to the circular cross-sectional shape of the seal rings and the small contact areas at the interface of the seal rings and the sealing surfaces, allowing an effective seal to be achieved at high pressures. The camming effect produced by the inner and outer rings and wedge member provides the ability for the wedge ring and seal ring system to radially compensate for geometry variances due to machining imperfections, radial deformation of the mandrel or housing due to pressure effects or thermal effects. In the seals of the present disclosure, a component of the energizing force applied to the wedge member is pressure so that the seal system may be self-energizing. The sealing contact pressures will increase as differential pressure is increased across the seal system.
The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
