Progressive Cavity Pump Suction-Chamber Segmentation for Rotor Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Progressive cavity pumps require extensive maintenance, including periodic replacement of the rotor and stator, and sealing of the drive shaft, which necessitates dismantling and requires significant space and time, especially due to the need to disconnect and reconfigure pipework.
Innovation Solution
A progressive cavity pump design where the suction chamber can be disassembled without moving the stator or drive shaft connection section, allowing for maintenance of the connecting shaft and seal without disturbing the process pipework, enabling the rotor and stator to be removed perpendicular to their axis of rotation, reducing the space and time required for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the stator is withdrawn parallel to the axis of rotation to expose the rotor for disconnection, then the rotor and stator can be accessed for maintenance, but a considerable amount of space around the pump is required and the pipe work connected to the stator must be disconnected
Solution Approach 1:
The pump is divided into separate sections: a first section containing the rotor and stator, and a second section containing the drive shaft connection. This segmentation allows the rotor and stator to be accessed by removing only the first section, rather than requiring complete disassembly and significant space for maneuvering the entire pump assembly.
2Ease of repair
If the pipe work connected to the stator is disconnected to permit stator removal, then the stator can be accessed for maintenance, but the time required to dismantle the pump increases
Solution Approach 1:
The pump is segmented into a first section (rotor and stator) and a second section (drive shaft connection), allowing selective removal of only the first section for maintenance. This eliminates the need to disconnect and reconfigure pipe work connected to the stator, significantly reducing dismantling time.
Solution Approach 2:
The first section containing the rotor and stator is extracted as a separate removable unit from the second section. This extraction allows maintenance personnel to access and service the rotor and stator without disturbing the pipe work or other pump components, reducing both dismantling time and complexity.
3Productivity
If the rotor and stator are made relatively long for application requirements, then the pump can handle the required fluid flow, but removing the stator from the rotor longitudinally requires a considerable amount of space
Solution Approach 1:
The pump is divided into a first section (rotor and stator) and a second section (drive shaft connection). This segmentation allows the long rotor and stator to remain intact for maintaining fluid flow capacity, while enabling access by removing only the first section rather than requiring space to maneuver the entire long assembly.
Solution Approach 2:
The connection between the first and second sections is arranged to allow removal of the first section in a direction that does not require longitudinal separation of the entire pump assembly. This dimensional change in the removal path reduces the space required around the pump for maintenance operations.
Data Source
AI summary
A progressive cavity pump is provided, having a stator section and a rotor section axially aligned with and surrounded by the stator section, a drive shaft connection section and a suction chamber, arranged between the stator section and the drive shaft connection section; wherein the suction chamber is configured such that it can be disassembled without moving the stator section or the drive shaft connection section, thereby facilitating the performance of maintenance operations.