Integral motor and pump
OwnerGuy B. Lemieuxinventor
Life of this patent
Estimating the term…
Abstract
A pump integral with an electric motor has an integral rotor and impeller assembly that rotates within a stator casing and is supported on hydrostatic radial and thrust bearings. The pump avoids having to provide external seals or friction type bearings. The unit has a stator with windings therein contained within a pump casing which has an axial liquid entry and a liquid outlet. An integral rotor and impeller assembly is mounted for rotation on a fixed axial shaft within the stator. The integral rotor and impeller assembly is positioned axially relative to the stator casing by hydrostatic thrust bearings where the pressure for the thrust bearing fluid is generated by radial ducts located within the integral rotor and impeller assembly.
Claims17
An integral motor and pump comprising:
- a stator having windings therein, integral with a pump casing, the pump casing having an axial liquid entry;
- a rotor mounted for rotation on a fixed axial shaft within the stator, the rotor integral with impeller means for pumping liquid;
- passage means through the fixed axial shaft for supplying seal liquid;
- at least one liquid duct in the rotor, extending radially from the fixed axial shaft to pressurize seal liquid centrifugally when the rotor rotates within the stator, and
- hydrostatic thrust bearings supplied with the pressurized seal liquid to axially position the rotor relative to the stator.
A multiple stage integral motor and pump comprising:
- a first stage stator integral with a pump casing having an axial liquid entry,
- a first stage rotor mounted for rotation within the first stage stator on a first fixed axial shaft, the first stage rotor adapted to rotate in a first rotational direction, and having a first axial liquid passageway with impeller means therein;
- a second stage stator, integral with the pump casing and in line with the first stage stator;
- a second stage rotor in line with the first stage rotor, mounted for rotation within the second stage stator on a second fixed axial shaft, the second stage rotor adapted to rotate counter to the first rotational direction, the second stage rotor having a second axial liquid passageway with impeller means therein;
- an intermediate diffuser means fixed within the pump casing, in line between the first stage rotor and the second stage rotor, having an inter-stage axial liquid passageway therethrough;
- passage means through at least one fixed axial shaft for supplying seal liquid;
- at least one liquid duct in at least one rotor, extending radially from the at least one fixed axial shaft to pressurize seal liquid centrifugally when the rotor rotates within the stator, and
- hydrostatic thrust bearings supplied with the pressurized seal liquid to axially position the first stage rotor relative to the first stage stator, and the second stage rotor relative to the second stage stator.
An integral generator and turbine comprising:
- a stator having windings therein, integral with a turbine casing, the turbine casing having an axial liquid entry;
- a rotor mounted for rotation on a fixed axial shaft within the stator, the rotor integral with impeller means for rotation with liquid flow;
- passage means through the fixed axial shaft for supplying seal liquid;
- at least one liquid duct in the rotor, extending radially from the fixed axial shaft to pressurize seal liquid centrifugally when the rotor rotates within the stator;
- and
- hydrostatic thrust bearings supplied with the pressurized seal liquid axially position the rotor relative to the stator.
Dependencies are inferred from the claim text.