Multi-channel Rotary Progressing Cavity Pump Design
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Solution Overview
Problem
Conventional rotary, progressing cavity pumps have limited pumping capacity due to the absence of peripheral progressing cavities, which restricts the volume of flowable matter that can be transported.
Innovation Solution
A multi-channel, rotary, progressing cavity pump design featuring a hollow housing with overlapping cylindrical chambers and meshed, lobed rotors that create both an axial and multiple peripheral progressing cavities when rotated, enhancing the pumping capacity by increasing the number of cavities through which flowable matter can be transported.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional rotary progressing cavity pump uses a single axial progressing cavity between meshed lobed rotors, then the pump structure is simple, but the pumping capacity is limited
Solution Approach 1:
The pump housing is segmented into multiple overlapping cylindrical chambers arranged radially around a central axis. Each chamber contains its own meshed lobed rotors that create independent progressing cavities. This segmentation allows multiple parallel pumping channels to coexist within a single pump body, dramatically increasing pumping capacity without proportionally increasing overall pump size
Solution Approach 2:
The invention transitions from a single axial pumping channel to multiple radial pumping channels by arranging cylindrical chambers in a radial pattern around the central axis. This dimensional reorganization creates parallel flow paths that simultaneously transport fluid, effectively multiplying the pumping capacity while maintaining a compact footprint
2Productivity
If the inlet and outlet ports are positioned at the ends of the housing, then fluid flow path is straightforward, but the multi-channel configuration becomes complex
Solution Approach 1:
The central inlet port and outlet port serve all radial chambers simultaneously. The inlet port at one end distributes fluid to multiple chambers, while the outlet port at the other end collects fluid from all chambers. This universal port configuration eliminates the need for individual ports per chamber, simplifying the overall structure despite the multi-channel internal arrangement
Data Source
AI summary
A multi-channel, rotary, progressing cavity pump comprising a housing having an outer wall defined by overlapping cylindrical chambers, a first end wall defining an inlet port, and a second end wall defining an outlet port, said inlet and outlet ports communicating with each chamber; meshed, lobed rotors disposed within said housing and comprising a plurality of lobes having first and second axially-facing end surfaces, said surfaces defining a twist angle, and each lobe defining a helix angle; each rotor being disposed in one chamber of said housing so that a lobe apex sealingly engages the outer wall defined by its associated chamber, and said surfaces sealingly engage said end walls; whereby, when said rotors are rotated in the same direction in unison, (i) an axial progressing cavity is created between said rotors, and (ii) a plurality of peripheral progressing cavities are created between said rotors and said housing.