Integrated Rotor Stator Pump for Stable Progressive Cavity Flow
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Solution Overview
Problem
Existing rotor stator pumps face inefficiencies in material displacement due to the interaction between the helical rotor and stator components, leading to challenges in maintaining consistent cavity progression and material flow.
Innovation Solution
The introduction of an electric motor-driven helical rotor rod that rotates relative to a pump stator, forming a series of progressing cavities to drive material flow, combined with an outer and inner drive system to facilitate rotor rotation, and dynamic seals to manage torque transmission and seal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a helical rotor rotates relative to a stator to displace material, then material pumping function is achieved, but inconsistent cavity progression and material flow occur
Solution Approach 1:
The patent replaces traditional mechanical drive systems with an electric motor system. The electric motor directly drives the helical rotor through electromagnetic interaction between the motor rotor and stator, eliminating mechanical transmission components. This substitution provides more precise control over rotor speed and position, ensuring consistent cavity progression and material flow while maintaining pumping efficiency.
Solution Approach 2:
The patent optimizes geometric parameters of the helical rotor and stator components, including helix angle, pitch, and diameter ratios. These parameter changes ensure proper meshing and consistent cavity formation throughout the pumping cycle, resolving the inconsistency in cavity progression while maintaining effective material displacement.
2Device complexity
If an electric motor is integrated within the pump structure, then compact design is achieved, but torque transmission and seal integrity become challenging
Solution Approach 1:
The patent merges the electric motor and pump components into a single integrated assembly. The motor rotor is concentrically positioned with the helical rotor, and the motor stator is positioned within the pump housing. This merging eliminates the need for external drive mechanisms and complex torque transmission systems, while dynamic seals are strategically positioned at critical interfaces to maintain integrity despite the integrated configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances material displacement efficiency by ensuring consistent cavity formation and reduces leakage, allowing for reliable and continuous pumping of materials through the rotor stator system.
Implementation Method 1
a motor stator disposed around the motor rotor to electromagnetically drive rotation of the motor rotor
Implementation Method 2
a helical rotor rod disposed at least partially within the pump stator, the helical rotor rod configured to rotate relative to the pump stator to form a series of progressing cavities to drive material along a cavity channel
Data Source
AI summary
A rotor stator pump includes a rotating helical component and a static helical component. An electric motor is connected to the rotating helical component to drive rotation of the rotating helical component. The rotating helical component and the static helical component are disposed radially inward of the motor rotor of the electric motor.