Magnetic drive pump
AssigneeAisin Seiki Kabushiki Kaisha
InventorsKazunari Adachi, Takashi Sakumoto
Life of this patent
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Abstract
A magnetic drive pump includes a pump chamber including an inlet port and an outlet port, a partition wall separating the pump chamber from an exterior, a rotational shaft provided at a side of the pump chamber relative to the partition wall, an impeller rotatably supported by a first end of the rotational shaft, an inductor integrally fixed to the impeller to rotate, a magnetic member positioned radially outside of the partition wall and facing the inductor, the magnetic member rotatably supported, a rotation drive device fixed to the magnetic means and actuating the magnetic member to rotate, and a drive device moving at least one of the magnetic member and the inductor in an axial direction of the rotational shaft.
Claims15
A magnetic drive pump, comprising:
- a pump chamber including an inlet port and an outlet port;
- a partition wall separating the pump chamber from an exterior;
- a rotational shaft provided at a side of the pump chamber relative to the partition wall;
- an impeller rotatably supported by a first end of the rotational shaft;
- an inductor integrally fixed to the impeller to rotate;
- a magnetic means positioned radially outside of the partition wall and facing the inductor, the magnetic means rotatably supported;
- a rotation drive means fixed to the magnetic means and actuating the magnetic means to rotate;
- and
- a drive means moving at least one of the magnetic means and the inductor in an axial direction of the rotational shaft, the drive means including a hermetically closed space which changes volume in response to a change of internal pressure applied thereto, the hermetically closed space comprising an outer cylinder, an inner diaphragm having a first end portion fitted for axial movement into a first end portion of the outer cylinder, and a yoke fixed to a second end portion of the inner diaphragm, the yoke having an outer surface in fluid-tight sliding engagement with an inner surface of the outer cylinder at a second end portion of the outer cylinder, the yoke having an inner surface connecting to the magnetic means, the magnetic means being formed in a ring-shaped configuration.
A magnetic drive pump, comprising:
- a pump chamber including an inlet port and an outlet port;
- a partition wall separating the pump chamber from an exterior;
- a rotational shaft provided at a side of the pump chamber relative to the partition wall;
- an impeller rotatably supported by a first end of the rotational shaft;
- an inductor integrally fixed to the impeller to rotate;
- a magnetic means positioned radially outside of the partition wall and facing the inductor, the magnetic means rotatably supported;
- a rotation drive means fixed to the magnetic means and actuating the magnetic means to rotate;
- and
- a drive means moving at least one of the magnetic means and the inductor in an axial direction of the rotational shaft, the drive means being operated by a vacuum pressure of a vacuum pump.
A magnetic drive pump, comprising:
- a pump chamber including an inlet port and an outlet port;
- a partition wall separating the pump chamber from an exterior;
- a rotational shaft provided at a side of the pump chamber relative to the partition wall;
- an impeller rotatably supported by a first end of the rotational shaft;
- an inductor integrally fixed to the impeller to rotate;
- a magnetic means positioned radially outside of the partition wall and facing the inductor, the magnetic means rotatably supported;
- a rotation drive means fixed to the magnetic means and actuating the magnetic means to rotate;
- and
- a drive means moving at least one of the magnetic means and the inductor in an axial direction of the rotational shaft, the drive means including a thermosensitive drive portion provided in the rotational shaft and expanded and contracted in response to temperature of coolant.
Dependencies are inferred from the claim text.