Pump Stator Pressure-Equalizing Casing for Smaller Outer Diameter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The regress type pump's inner element has a large outer diameter due to high pressure resistance requirements, which is challenging to reduce effectively.
Innovation Solution
The pump design incorporates a tubular pump casing with a penetrating portion that communicates with a cylindrical gap between the production pipe and pump stator, reducing pressure resistance and allowing for a smaller outer diameter by using seal members to maintain airtightness and control pressure differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the pump casing is designed to withstand high pressure differences, then the pressure resistance performance is improved, but the radial thickness and outer diameter of the pump casing increase
Solution Approach 1:
The pump casing is segmented into multiple sections along the vertical direction, with penetrating portions creating pressure equalization zones. This segmentation allows different sections to experience different pressure conditions, reducing the overall pressure differential that the casing must withstand, thereby enabling a smaller outer diameter while maintaining adequate pressure resistance.
Solution Approach 2:
The penetrating portions act as intermediaries that connect the high-pressure interior of the pump casing with the lower-pressure external environment. By providing these controlled connection points, the pressure difference across the casing wall is reduced, allowing the casing to be designed with smaller thickness and diameter while still maintaining structural integrity.
2Productivity
If the outer diameter of the inner element is reduced, then the productivity of the pump is improved, but the pressure resistance performance deteriorates
Solution Approach 1:
By segmenting the pump casing into pressure zones through penetrating portions, the design allows for reduced overall dimensions while maintaining pressure resistance in critical areas. The segmentation creates localized pressure equalization that enables compact design without sacrificing strength.
Solution Approach 2:
The penetrating portions are strategically positioned to create local pressure equalization zones where needed. This local quality approach allows the casing to have varying thickness and strength characteristics in different regions, optimizing the balance between compact size and pressure resistance performance.
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
This design effectively reduces the outer diameter of the pump stator and inner element, enhancing the pump's efficiency and structural integrity while maintaining airtightness and controlling pressure differences.
Implementation Method 1
the pump body causes the liquid having the pressure in the intermediate stage to flow into the gap. Accordingly, it is possible to reduce the pressure difference between the inside and the outside of the pump casing
Implementation Method 2
a first seal member that performs sealing between an outer peripheral surface of the fitting member and the inner peripheral surface of the production pipe in a circumferential direction, and a second seal member that is disposed below a position where the penetrating portion is formed and above a position where the production pipe supports the inner element and performs sealing in the circumferential direction
Data Source
AI summary
A cylindrical gap is formed between a production pipe and a pump stator, the pump stator has a tubular pump casing that surrounds a plurality of pump bodies, the pump casing is provided with a penetrating portion that penetrates the pump casing in a radial direction and communicates with the gap, and the penetrating portion is formed in a portion of the pump casing that faces a pump body, which is located in an intermediate stage of the plurality of pump bodies, in the radial direction.