The Universal Mechanical Seal Gland

Common mechanical seal gland formed of plastic has a central aperture positionable over a shaft extending from a housing for positioning a stationary seal towards a rotary seal on the shaft. The central aperture is formed of a plurality of cylindrical and radial surfaces which define sealing surfaces allowing the gland to be used with a variety of differently sized and shaped seal members and housings and differently sized shafts.

 All kinds of units resembling pumps, compressors and the like employ rotary shafts supported for rotation in a housing during which pressurized liquid engages the shaft on the interior of the housing and tends to leak outwardly alongside the shaft tothe exterior of the housing. Such leakage is obviously undesirable for a wide range of causes such as environmental contamination the place the liquid is a hazardous chemical, price of the lost liquid, cleanup prices and upkeep costs and the lack of energyresulting from such leakage. A standard and nicely-recognized expedient for decreasing leakage round a shaft is that of offering a stuffing field surrounding the shaft with packed stuffing materials being held involved with the shaft.

 Enhancements over the stuffing box concept have included rotary mechanical seals which principally consist of an annular rotary seal member fixed to the shaft for rotation therewith and having a radial floor engageable with a radial surface of a set annular seal member holding place against the rotary seal by a gland member machined to provide the required geometry and spacing for effecting a satisfactory contact between the contacting radial surfaces of the rotary annular seal member and the fixed annular seal member.

 The present common gland member invention avoids the necessity for using such specifically designed seal members, eliminates the need for adapter rings and also permits the usage of the universal gland member with a wide variety of mechanical seal constructions and totally different shaft sizes.

 Subsequently, it is a primary object of the current invention to provide a new and improved mechanical seal gland.The additional object of the current invention is the availability of a new and improved mechanical seal gland capable of utilization with all kinds of mechanical seal constructions, completely different shaft sizes and different gland bolting configurations.

 Achievement of the foregoing objects is permitted by the popular embodiment of the present invention by means of the availability of a mechanical seal gland comprising a polypropylene body having an axially extending aperture extending between parallel front and rear planar surfaces with the axially extending aperture being defined by a plurality of cylindrical surfaces related by radial surfaces with the cylindrical surfaces being of different diameters.

 The smallest diameter cylindrical surface is centrally positioned midway between the front and rear surfaces of the polypropylene block with adjacent cylindrical surfaces respectively being supplied between the smaller diameter floor and the front and rear surfaces. The cylindrical surfaces along with their adjacent radial surfaces define step annular seal participating surfaces which have interaction an annular stationary seal member formed of ceramic materials or the like for holding the seal member in contact with a shaft-mounted rotary seal part of a mechanical seal combination. The plurality of such annular surfaces on the gland allow its usage with all kinds of fastened stationary seal members as occur with different sizes of shafts with the one limitation being thatthe diameter of the shaft should be less than the diameter of the centrally positioned smallest diameter cylindrical floor of the gland.

 The gland member is provided with a plurality of concentric circles formed in its front surface for offering a guide for permitting mounting apertures to be bored at desired radial distances from the center of the gland for permitting connection of the gland to tapped openings in a specific pump or compressor housing. Additionally, the gland physique could be provided with inwardly extending bolt-receiving slots which prolong inwardly from the cylindrical periphery of the gland or it can be provided with pre-bored mounting bolt receiving holes if desired. Another variation of the gland resides within the provision of chordal surfaces forming a portion of the outer periphery of the gland so as to allow it to be fitted onto housings having space limitations which would not accommodate a gland having a cylindrical outer periphery of the same diameter as the diameter of the cylindrical parts of the gland.

 A better understanding of the construction and usage of the preferred embodiments of the present mechanical seal invention will likely be achieved when the next detailed description is considered in conjunction with the appended drawings in which like reference numerals are used for the same parts in the different views.

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