Canned motor pump
First Claim
Patent Images
1. A canned motor pump, comprising a hollow driving unit;
- a rotary driven unit at least partly surrounded by said driving unit;
means for sealing said units from each other, including a can interposed between said units and including a plurality of walls defining at least one space;
means for admitting a heat exchange fluid into said space; and
flange means mounted on said walls in sealing relationship therewith, said admitting means being provided in said flange means.
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Accused Products
Abstract
A canned motor pump wherein the can has two coaxial tubular walls defining an annular space for the flow of a heat exchange fluid which heats or cools the can. If the can has an end wall, the latter can be formed with an additional space which communicates with the annular space. The driven rotor within the can can be rotated by a stator which surrounds the can or by a hollow rotor which rotates the driven rotor by way of one or more magnets. The can can be heated by an electric heater.
62 Citations
33 Claims
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1. A canned motor pump, comprising a hollow driving unit;
- a rotary driven unit at least partly surrounded by said driving unit;
means for sealing said units from each other, including a can interposed between said units and including a plurality of walls defining at least one space;
means for admitting a heat exchange fluid into said space; and
flange means mounted on said walls in sealing relationship therewith, said admitting means being provided in said flange means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
- a rotary driven unit at least partly surrounded by said driving unit;
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31. A canned motor pump, comprising a hollow driving unit;
- a rotary driven unit at least partly surrounded by said driving unit, said driven unit including a pumping element;
means for sealing said units from each other, including a can interposed between said units and having a first end nearer to and a second end more distant from said pumping element, said can having a plurality of walls defining at least one space, and said walls comprising an inner tube, an outer tube spacedly surrounding said inner tube and an end wall at said second end of said can, said end wall having at least one passage which forms part of said space and including a plurality of panels flanking said passage, said panels comprising first and second panels respectively sealing said inner and outer tubes at said second end of said can, and said tubes being substantially coaxial with said rotary driven unit; and
means for admitting a heat exchange fluid into space.
- a rotary driven unit at least partly surrounded by said driving unit, said driven unit including a pumping element;
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32. A canned motor pump for conveying fluid media within a predetermined pressure range including an elevated pressure, comprising a hollow driving unit;
- a rotary driven unit at least partly surrounded by said driving unit;
means for sealing said units from each other, including a can interposed between said units and including a plurality of walls defining at least one space, said elevated pressure prevailing in the interior of said can, and said walls comprising a relatively thin inner tube and a thicker outer tube spacedly surrounding said inner tube, said space including an annular portion between said tubes, and said inner tube being elastically deformable to expand radially outwardly toward and into engagement with said outer tube in response to a drop of pressure in said annular portion to a predetermined level below said elevated pressure; and
means for admitting a heat exchange fluid into said space.
- a rotary driven unit at least partly surrounded by said driving unit;
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33. A canned motor pump, comprising a hollow driving unit;
- a rotary driven unit at least partly surrounded by said driving unit, said rotary driven unit including a pumping element;
means for sealing said units from each other, including a can interposed between said units and having a first end nearer to and a second end more distant from said pumping element, said can comprising a plurality of walls defining at least one space, and said walls including an inner tube and an outer tube spacedly surrounding said inner tube;
a first collar rigid with and extending substantially radially outwardly from one of said tubes at one end of said can;
a second collar for the other of aid tubes disposed at said one end of said can;
a housing for said can including a flange at the other end of said can, said flange being provided with a hole and each of said tubes having an end portion in said hole, said sealing means further comprising a first annular sealing element interposed between the end portion of said one tube and said flange, and a second annular sealing element interposed between the end portion of said other tube and said flange;
means for separably mounting said first collar in said housing so that said first collar and said one can be jointly installed in and jointly removed from said housing; and
means for admitting a heat exchange fluid into said space.
- a rotary driven unit at least partly surrounded by said driving unit, said rotary driven unit including a pumping element;
Specification