Shaft coupling for a molten metal pump
First Claim
1. Apparatus for pumping molten metal, the apparatus comprising:
- a) a submergible pump housing;
b) a rotatable impeller disposed within the pump housing;
c) an impeller shaft having a first and second end, the first end coupled to the impeller and extending through an opening in the pump housing;
d) a motor-driven rotating drive shaft;
e) a coupling member engaging an end of the drive shaft and the second end of the impeller shaft; and
f) a shear pin extending between the coupling member and one of said drive shafts and said impeller shafts.
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Accused Products
Abstract
An apparatus for pumping molten metal is disclosed. The apparatus includes a submergible pump housing, a rotatable impeller disposed within the pump housing, an impeller shaft having one end coupled to the impeller and extending through an opening in the pump housing, a motor-driven rotating drive shaft and a coupling member engaging an end of the drive shaft and an opposite end of the impeller shaft and a shear pin extending between the coupling member and one of the drive shaft and impeller shaft thereby coupling the drive shaft and the impeller shaft. Preferably, the coupling member is a female coupling member having two shaft receiving openings receiving the drive shaft end and the second end of the impeller shaft and includes a pair of aligned transverse apertures. A graphite pin is inserted through the coupling member apertures and extends through a transverse bore near the end of the impeller shaft. The graphite pin is held in place by a wire wrapped around an outer periphery of the coupling. The wire includes looped ends which are adapted to be twisted and thereby holding the pin in place.
160 Citations
13 Claims
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1. Apparatus for pumping molten metal, the apparatus comprising:
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a) a submergible pump housing; b) a rotatable impeller disposed within the pump housing; c) an impeller shaft having a first and second end, the first end coupled to the impeller and extending through an opening in the pump housing; d) a motor-driven rotating drive shaft; e) a coupling member engaging an end of the drive shaft and the second end of the impeller shaft; and f) a shear pin extending between the coupling member and one of said drive shafts and said impeller shafts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A coupling member for coupling motor-driven drive shaft and an impeller shaft of a molten metal pump apparatus, the coupling member comprising:
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a) a housing having two shaft-receiving openings, one to receive an end portion of the motor-driven drive shaft and one to receive the impeller shaft, the housing further including an aperture for receiving a shear pin; b) the shear pin received in the aperture and extending into one of the open ends; and c) a pin retainer connected to one of the shear pin and housing. - View Dependent Claims (10, 11, 12, 13)
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Specification