Modular Pump Rotor Assemblies

Modular pump rotor assemblies having a rotatable driving element and a rotor that is removably connected to the driving element by at least one removable fastener are disclosed. The assemblies also have a rotor support bearing that is disposed between the rotatable driving element and the rotor. The assemblies may have a rotatable driving element that is of a type that is dynamically sealed to a pump housing, or a rotatable driving element that is of a type that is statically sealed to a pump housing, such as for use in a magnetically coupled pump or a canned-motor device. 1. A modular pump rotor assembly comprising a rotatable driving element and a rotor , wherein the rotor is removably connected to the rotatable driving element by at least one removable fastener.2. The modular pump rotor assembly of claim 1 , further comprising a rotor support bearing claim 1 , wherein the rotor support bearing is disposed between the rotatable driving element and the rotor.3. The modular pump rotor assembly of claim 1 , wherein the rotatable driving element further comprises a rotatable shaft.4. The modular pump rotor assembly of claim 3 , further comprising a clamp plate disposed between and removably connected to the rotatable shaft and the rotor.5. The modular pump rotor assembly of claim 4 , wherein modular pump rotor assembly further comprises a rotor support bearing claim 4 , and wherein the rotor support bearing is disposed between the rotatable shaft and the clamp plate.6. The modular pump rotor assembly of claim 1 , wherein the rotatable driving element further comprises a rotatable inner magnet assembly.7. The modular pump rotor assembly of claim 6 , wherein the modular pump rotor assembly further comprises a rotor support bearing claim 6 , and wherein the rotor support bearing is disposed between the rotatable inner magnet assembly and the rotor.8. The modular pump rotor assembly of claim 1 , wherein the rotatable driving element is configured to be separately ...

POSITIVE-DISPLACEMENT ROTARY PUMP HAVING A POSITIVE-DISPLACEMENT AUXILIARY PUMPING SYSTEM

Positive-displacement auxiliary pumping systems for use in pump apparatus of different configurations are disclosed. The positive-displacement auxiliary pumping systems are included in positive-displacement rotary pumps having a casing defining a pumping cavity, an inlet port connected to the pumping cavity, a discharge port connected to the pumping cavity, and a positive-displacement auxiliary pumping port connected to the pumping cavity. Pumping elements move within the pumping cavity of the casing and define a collapsing pocket that maintains fluid communication with the positive-displacement auxiliary pumping port after the collapsing pocket is no longer in fluid communication with the discharge port. 1. A positive-displacement rotary pump comprising:a casing defining a pumping cavity;an inlet port connected to the pumping cavity;a discharge port connected to the pumping cavity;a positive-displacement auxiliary pumping port connected to the pumping cavity, andpumping elements that move within the pumping cavity of the casing and define a collapsing pocket that maintains fluid communication with the positive-displacement auxiliary pumping port after the collapsing pocket is no longer in fluid communication with the discharge port.2. A positive-displacement rotary pump in accordance with claim 1 , wherein the pumping elements further comprise a rotatable rotor having a plurality of movable vanes.3. A positive-displacement rotary pump in accordance with claim 1 , wherein the pumping elements further comprise rotatable gears.4. A positive-displacement rotary pump in accordance with claim 1 , wherein the pumping elements further comprise rotatable lobes.5. A positive-displacement rotary pump in accordance with claim 1 , wherein fluid is positively-displaced through the auxiliary pumping port at a flowrate that is effectively independent of the differential pressure of the pump.6. A positive-displacement rotary pump in accordance with claim 1 , wherein fluid is ...

ROTARY DEVICE HAVING A RADIAL MAGNETIC COUPLING

Rotary devices having a casing and an inner drive portion of a magnet coupling disposed inside of a rotor assembly are disclosed. The inner drive portion and rotor assembly are disposed within the casing and rotatable about a rotational axis. The rotor assembly includes a bushing between the magnets of the rotor assembly and a stationary canister is sealed to the casing and separates an internal fluid chamber within the casing from the inner driven portion. The stationary canister can be of multi-piece or unitary construction and is held in position by a front portion of the casing. 1. A rotary device having a magnet coupling comprising:a casing having a front portion and a rear portion;a rotatable inner drive portion of a magnetic coupling having multiple magnets proximate an outer periphery of the inner drive portion;a rotor assembly that includes a driven portion of the magnetic coupling having multiple magnets proximate an inner periphery of the rotor assembly;the inner drive portion and rotor assembly being disposed within the casing and being rotatable about a rotational axis;a stationary canister comprising a substantially cylindrical portion disposed between the magnets of the inner drive portion and the magnets of the rotor assembly and including a radial bearing surface that engages the rotor assembly, an axial bearing surface that engages the rotor assembly in one axial direction, and separates an internal fluid chamber within the casing from the inner driven portion.2. The rotary device of wherein the rotor assembly further comprises a bushing disposed between the inner periphery of the magnets of the rotor assembly and the substantially cylindrical portion of the stationary canister.3. The rotary device of wherein the bushing disposed between the inner periphery of the magnets of the rotor assembly and the substantially cylindrical portion of the stationary canister includes a radial bearing surface that engages the stationary canister claim 2 , an ...

Rotary device having a radial magnetic coupling

Rotary devices having a casing and an inner drive portion of a magnet coupling disposed inside of a rotor assembly are disclosed. The inner drive portion and rotor assembly are disposed within the casing and rotatable about a rotational axis. The rotor assembly includes a bushing between the magnets of the rotor assembly and a stationary canister is sealed to the casing and separates an internal fluid chamber within the casing from the inner driven portion. The stationary canister can be of multi-piece or unitary construction and is held in position by a front portion of the casing.

Rotary device having a radial magnetic coupling

Rotary devices having a casing and an inner drive portion of a magnet coupling disposed inside of a rotor assembly are disclosed. The inner drive portion and rotor assembly are disposed within the casing and rotatable about a rotational axis. The rotor assembly includes a bushing between the magnets of the rotor assembly and a stationary canister is sealed to the casing and separates an internal fluid chamber within the casing from the inner driven portion. The stationary canister can be of multi-piece or unitary construction and is held in position by a front portion of the casing.

Rotary device having a radial magnetic coupling

Rotary device having a radial magnetic coupling

Rotary devices having a casing and an inner drive portion of a magnet coupling disposed inside of a rotor assembly are disclosed. The inner drive portion and rotor assembly are disposed within the casing and rotatable about a rotational axis. The rotor assembly includes a bushing between the magnets of the rotor assembly and a stationary canister is sealed to the casing and separates an internal fluid chamber within the casing from the inner driven portion. The stationary canister can be of multi-piece or unitary construction and is held in position by a front portion of the casing.