| CPC F04D 29/042 (2013.01) [F04D 1/00 (2013.01); F04D 15/0005 (2013.01); F04D 15/0016 (2013.01); F04D 15/0022 (2013.01); F04D 25/06 (2013.01); F04D 29/043 (2013.01); F04D 29/046 (2013.01); F04D 29/42 (2013.01); F04D 29/426 (2013.01)] | 16 Claims |
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1. A centrifugal pump, comprising a pump casing and a first drive mechanism, a second drive mechanism, a pump shaft, and an impeller that are disposed in the pump casing, wherein
the pump casing comprises a first chamber and a second chamber that are connected, a first axis of the pump shaft coincides with respective axes of the first chamber and the second chamber, an inner diameter of the second chamber is greater than an inner diameter of the first chamber, the impeller is connected to an end of the pump shaft, the first drive mechanism and the second drive mechanism are connected to the pump shaft and located on a side of the pump shaft that is opposite the impeller, the first drive mechanism is configured to drive the pump shaft to rotate, the second drive mechanism is configured to drive the pump shaft to move along the first axis, and the impeller is driven by the pump shaft to rotate in the first chamber or the second chamber;
wherein the first drive mechanism comprises a first bearing that is connected to the pump shaft, the first bearing is located on the side of the pump shaft that is opposite the impeller; and
the second drive mechanism comprises a coil, a spring, and an armature, the armature is located on a side opposite from a motor of the first bearing, the armature is connected to the first bearing through the spring, a direction of contraction of the spring corresponding to a direction of the first axis of the pump shaft, the armature is connected to the coil, and the coil is energized to turn the armature into a magnetic attraction structure.
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