MODULAR THRUST-COMPENSATING ROTOR ASSEMBLY
First Claim
1. A screw pump comprising:
- a pump housing; and
a rotor set disposed within the pump housing, the rotor set including a power rotor and an idler rotor having radially intermeshing threaded portions, the power rotor including a balance piston enclosed by the pump housing, wherein a radial clearance between an entire circumference of the balance piston and the pump housing is in a range between 1 micron and 200 microns;
wherein the power rotor is provided with a tapered bearing surface configured to define a wedge-shaped, radial gap axially intermediate the power rotor and the idler rotor.
5 Assignments
0 Petitions
Accused Products
Abstract
A modular rotor assembly for a screw pump including a power rotor and an idler rotor having respective first ends adapted to be disposed in a suction side of the screw pump and respective second ends adapted to be disposed in a discharge side of the screw pump, the power rotor including a balance piston adapted to be disposed within a pump housing of the screw pump with a radial clearance between an entire circumference of the balance piston and the pump housing is in a range between 1 micron and 200 microns, wherein the power rotor is provided with a tapered bearing surface configured to define a wedge-shaped, radial gap axially intermediate the power rotor and the idler rotor.
0 Citations
19 Claims
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1. A screw pump comprising:
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a pump housing; and a rotor set disposed within the pump housing, the rotor set including a power rotor and an idler rotor having radially intermeshing threaded portions, the power rotor including a balance piston enclosed by the pump housing, wherein a radial clearance between an entire circumference of the balance piston and the pump housing is in a range between 1 micron and 200 microns; wherein the power rotor is provided with a tapered bearing surface configured to define a wedge-shaped, radial gap axially intermediate the power rotor and the idler rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A rotor set for a screw pump, the rotor set comprising:
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a power rotor and an idler rotor having respective first ends adapted to be disposed in a suction side of the screw pump and respective second ends adapted to be disposed in a discharge side of the screw pump, the power rotor including a balance piston adapted to be disposed within a pump housing of the screw pump with a radial clearance between an entire circumference of the balance piston and the pump housing is in a range between 1 micron and 200 microns; wherein the power rotor is provided with a tapered bearing surface configured to define a wedge-shaped, radial gap axially intermediate the power rotor and the idler rotor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification