Field of the Invention:
The present invention relates to an axial flow pump for installation in a pipe or tunnel system.
The axial flow pumps known from the prior art are characterized in that the drive of the pump runner is arranged outside the water-carrying area. Such an axial flow pump is set forth for example in CH 150076. Such a pump requires a sealed leadthrough of the pump shaft and an angular gear or an arc-shaped arrangement of the water-carrying part of the pump.
The object of this invention is to specify an axial flow pump that may be integrated into an existing pipe or tunnel system without major structural changes to the existing structure. In addition, the axial flow pump according to the invention is low-maintenance and environmentally friendly, because the axial flow pump according to the invention is free of substances that cause water pollution.
The inventor has found that this object may be accomplished by an axial flow pump as claimed. Advantageous embodiments are set forth in the dependent claims.
The solution according to the invention is explained below with reference to the drawings. The drawings illustrate the following:
Because the motor 4, which drives the runner 1, is arranged within the liquid-carrying area, there is no need for an outward-fed pump shaft and the associated sealing of the rotary leadthrough. Only the control and power cables need to be fed to the exterior. In addition, a curved arrangement of the liquid-carrying part of the pump is not required, and consequently the pump according to the invention is much smaller and more compact than comparable classic axial pumps. The pump according to the invention may thus be easily integrated into an existing pipe or tunnel system without major structural changes. As a result of lubrication using the pumped liquid, the pump is largely maintenance-free and environmentally friendly. In the event of maintenance, the entire pump may be removed in one piece or in parts and overhauled.
Depending on the use case, the pump according to the invention may be installed at any angle in an existing or new pipe or tunnel system. The liquid inlet and outlet of the axial flow pump may be adapted according to the use case (flange connection, direct connection to the existing pipe or tunnel system, etc.).
One possible application of the axial flow pump according to the invention is the installation of a horizontal version of the pump in a drinking water pumping station to increase the suction pressure of the main pumps.
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10 2017 119 241.7 | Aug 2017 | DE | national |
Filing Document | Filing Date | Country | Kind |
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PCT/EP2018/071994 | 8/14/2018 | WO |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2019/038130 | 2/28/2019 | WO | A |
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20200224666 A1 | Jul 2020 | US |