Apparatus for sealing a pump chamber of a rotary lobe pump, and a rotary lobe pump having said apparatus
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United States of America Patent
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Dec 15, 2015
Grant Date -
Oct 2, 2014
app pub date -
May 11, 2012
filing date -
May 12, 2011
priority date (Note) -
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Abstract
The invention relates to an apparatus for sealing a pump chamber of a rotary lobe pump vis-a-vis a fluid-free region of the rotary lobe pump, in particular in the region of a shaft duct, wherein the apparatus has two or more sealing elements, which can be disposed adjacent to a front side of a rotary piston disposed on a shaft in the pump chamber of the rotary lobe pump in such a way that a labyrinth gap extends between the sealing elements, said labyrinth gap being arranged in a radial direction relative to the shaft and in an axial direction in order to extend the seal land. According to the invention, the seal land is larger in a radial direction relative to the shaft than the seal land in an axial direction relative to the shaft.
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