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US 2024/0167478 A1Published application
Motor pump, pump unit, and method of balancing impeller of motor pump
AssigneeEbara Corporation
InventorsYasutaka KONISHI, Hiroyuki KAWASAKI
Life of this patent
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Abstract
The present invention relates to a motor pump, a pump unit, and a method of balancing an impeller of the motor pump. The motor pump includes an impeller (1), a rotor (2), a stator (3), and a bearing (5). The rotor (2) and the bearing (5) are arranged in a suction side region (Ra) of the impeller (1).
Claims41
A motor pump, comprising:
- an impeller;
- a rotor fixed to the impeller;
- a stator arranged radially outward of the rotor;
- and
- a bearing supporting the impeller, the bearing being arranged outside a flow path of the impeller,
- wherein the rotor and the bearing are arranged in a suction side region of the impeller.
3 more elements
A pump unit, comprising:
- a plurality of motor pumps;
- and
- a control device configured to operate the motor pumps at variable speeds,
- wherein each of the motor pumps comprises:
- an impeller;
- a rotor fixed to the impeller;
- a stator arranged radially outward of the rotor;
- and
- a bearing supporting the impeller, the bearing being arranged outside a flow path of the impeller,
- wherein the rotor and the bearing are arranged in a suction side region of the impeller.
7 more elements
A motor pump, comprising:
- an impeller;
- a rotor fixed to the impeller;
- a stator arranged radially outward of the rotor;
- and
- a bearing supporting the impeller, the bearing being arranged outside a flow path of the impeller,
- wherein the rotor and the bearing are arranged in a suction side region of the impeller,
- wherein the impeller is a centrifugal impeller comprising a side plate with a suction portion formed in a central portion of the side plate, and the side plate is arranged opposite a main plate, and
- wherein the side plate has an annular protrusion being arranged radially inward of an outer edge portion of the side plate, and the rotor is fixed to the protrusion.
5 more elements
A motor pump, comprising:
- an impeller;
- a rotor fixed to the impeller;
- a stator arranged radially outward of the rotor;
- and
- a bearing supporting the impeller, the bearing being arranged outside a flow path of the impeller,
- wherein the rotor and the bearing are arranged in a suction side region of the impeller,
- wherein the impeller is a centrifugal impeller comprising a side plate with a suction portion formed in a central portion of the side plate, and the side plate is arranged opposite a main plate, and
- wherein the rotor is fixed to the side plate so as to block the flow path of the impeller formed between the main plate and the side plate.
5 more elements
A motor pump, comprising:
- a first impeller;
- a rotor fixed to the first impeller;
- a stator arranged radially outward of the rotor;
- a bearing supporting the first impeller, the bearing being arranged outside a flow path of the impeller;
- a communication shaft connected to the first impeller;
- and
- a second impeller connected to the communication shaft,
- wherein the rotor and the bearing are arranged in a suction side region of the first impeller.
5 more elements
A motor pump, comprising:
- a plurality of impellers having different sizes;
- a plurality of rotors fixed to the impellers and having different lengths;
- a plurality of stators having lengths corresponding to the lengths of the rotors;
- a plurality of stator casings accommodating the stators and having lengths corresponding to the lengths of the stators;
- and
- a bearing supporting each of the impellers,
- wherein each of the rotors and the bearing are arranged in a suction side region of each the impellers.
4 more elements
A motor pump, comprising:
- an impeller;
- a rotor fixed to the impeller;
- a stator arranged radially outward of the rotor;
- a bearing supporting to the impeller, the bearing being arranged outside a flow path of the impeller;
- and
- a swivel stopper arranged on a back side of the impeller,
- wherein the rotor and the bearing are arranged in a suction side region of the impeller.
4 more elements
A motor pump, comprising:
- an impeller;
- a rotor fixed to the impeller;
- a stator arranged radially outward of the rotor;
- a bearing supporting to the impeller, the bearing being arranged outside a flow path of the impeller;
- and
- a suction casing and a discharge casing arranged adjacent to the impeller,
- wherein the rotor and the bearing are arranged in a suction side region of the impeller, and
- wherein the suction casing and the discharge casing have a flat flange shape.
5 more elements
Dependencies are inferred from the claim text.