Couplings for molten metal devices
First Claim
1. A rotary degasser including:
- (a) a motor;
(b) a motor shaft having a first end and a second end, the first end connected to the motor;
(c) a coupling having a first coupling member and a second coupling member, the first coupling member connected to the second end of the motor shaft, the second coupling member comprising a bore having an opening, the bore for receiving an end of a rotor shaft through the opening, the bore having an end distal the opening and an end proximal the opening, the distal end being tapered and not threaded, the proximal end being threaded, the distal end comprising a passage for transferring gas, the first coupling member in communication with the passage;
(d) a rotor shaft having;
(i) a first end and a second end, the first end being received in and connected to the second coupling member; and
(ii) a passage through the rotor shaft, the passage including an opening in the first end of the rotor shaft and an opening in the second end of the rotor shaft; and
(e) a rotor connected to the second end of the rotor shaft.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed are couplings for use in devices positioned in a molten metal bath. One is a rigid coupling that may include a counterweight, the coupling to reduce nonconcentric movements during rotation of a shaft, particularly a rotor shaft. Another coupling uses magnetic force, rather than a direct physical connection, to form a driving connection between a drive shaft (such as a motor drive shaft) and a driven shaft (such as a rotor shaft). In the event the rotor is jammed, the increased torque creates an overload that disconnects the drive shaft from the driven shaft in order to help prevent damage to the rotor, driven shaft, drive shaft and other components. Also disclosed is a coupling to transfer gas into a shaft, the coupling having a non-threaded internal surface to help prevent gas leakage and thus assist in preventing any resulting damage to the coupling and shaft.
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Citations
12 Claims
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1. A rotary degasser including:
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(a) a motor; (b) a motor shaft having a first end and a second end, the first end connected to the motor; (c) a coupling having a first coupling member and a second coupling member, the first coupling member connected to the second end of the motor shaft, the second coupling member comprising a bore having an opening, the bore for receiving an end of a rotor shaft through the opening, the bore having an end distal the opening and an end proximal the opening, the distal end being tapered and not threaded, the proximal end being threaded, the distal end comprising a passage for transferring gas, the first coupling member in communication with the passage; (d) a rotor shaft having; (i) a first end and a second end, the first end being received in and connected to the second coupling member; and (ii) a passage through the rotor shaft, the passage including an opening in the first end of the rotor shaft and an opening in the second end of the rotor shaft; and (e) a rotor connected to the second end of the rotor shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification