Pump with rotating inlet
DCFirst Claim
1. A pump for pumping molten metal, the pump comprising:
- (a) a motor;
(b) a pump base including a pump chamber and a discharge through which a stream of molten metal is defined;
(c) a device at least partially positioned in the pump chamber, the device comprising;
(i) an inlet structure defining one or more openings through which molten metal can pass;
(ii) a displacement structure connected to the inlet structure, the displacement structure for displacing molten metal and having a portion that directs molten metal downward and a portion that directs molten metal outward; and
(d) a drive shaft connecting the motor to the device;
wherein as the device is rotated, both the inlet structure and displacement structure rotate.
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Abstract
A device for use in a molten metal pump helps alleviate jams between a rotating rotor and stationary inlet. The device includes an inlet structure including one or more openings and a displacement structure that preferably includes one or more rotor blades. The inlet structure and displacement structure are connected to one another (preferably, but not necessarily, as a unitary piece), thus enabling them both to rotate. A pump including the device is also enclosed. The invention further includes a bearing surface for an impeller or for a device according to the invention, wherein the bearing surface includes grooves that help reduce molten metal build up between the bearing surface of the impeller or device and the bearing surface of a pump chamber.
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Citations
20 Claims
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1. A pump for pumping molten metal, the pump comprising:
- (a) a motor;
(b) a pump base including a pump chamber and a discharge through which a stream of molten metal is defined;
(c) a device at least partially positioned in the pump chamber, the device comprising;
(i) an inlet structure defining one or more openings through which molten metal can pass;
(ii) a displacement structure connected to the inlet structure, the displacement structure for displacing molten metal and having a portion that directs molten metal downward and a portion that directs molten metal outward; and
(d) a drive shaft connecting the motor to the device;
wherein as the device is rotated, both the inlet structure and displacement structure rotate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- (a) a motor;
Specification