Reciprocation Pump Integrated Casing Leakage Prevention
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Solution Overview
Problem
Existing reciprocation pumps used in dialysis and other applications face issues with liquid leakage due to aged degradation of sealing members, which compromises the integrity of the pumping process.
Innovation Solution
The design incorporates a reciprocation pump with supply and waste liquid-side sub-pumping chambers, where a rod extends through these chambers, and diaphragms are used to form sub-pumping chambers, eliminating the need for separate sealing members between the main pumping chambers and sub-pumping chambers, and a central sealing member seals the chambers to prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sealing members are used between motor casing and pump casing, then the pump can be assembled and operated, but liquid leakage occurs due to aged degradation of sealing members
Solution Approach 1:
The invention extracts and eliminates the sealing members from the system by integrating the motor casing and pump casing into a single unified casing structure. This removes the sealing members that are prone to aged degradation, thereby preventing liquid leakage while maintaining assembly capability through the integrated design.
Solution Approach 2:
The invention merges the motor casing and pump casing into a single integrated casing, eliminating the interface between them where sealing members were required. This combination removes the source of leakage problems while preserving the functional separation of motor and pump components within the unified structure.
2Reliability
If multiple sealing members are used in the reciprocation pump, then the chambers can be sealed, but the complexity of the device increases
Solution Approach 1:
The invention extracts and removes multiple sealing members from the reciprocation pump design by integrating casings and using alternative sealing approaches, thereby reducing device complexity while maintaining chamber sealing integrity through the simplified structure.
3Ease of manufacture
If separate motor casing and pump casing are used, then the components can be independently manufactured, but additional sealing members are required
Solution Approach 1:
The invention merges the motor casing and pump casing into a single integrated component, eliminating the need for additional sealing members at their interface. This integration maintains manufacturing ease through modular design principles while reducing overall device complexity by removing redundant sealing components.
Data Source
AI summary
A reciprocation pump has a supply liquid-side sub-pumping chamber arranged adjacent to the supply liquid-side pumping chamber at an external side. A waste liquid-side sub-pumping chamber is arranged adjacent to the waste liquid-side pumping chamber at an external side. A rod extends through the supply liquid-side sub-pumping chamber, the supply liquid-side pumping chamber, the waste liquid-side pumping chamber and the waste liquid-side sub-pumping chamber. The rod is connected to the reciprocation mechanism and the driving source to transmit a driving force of the driving source to the reciprocation mechanism. Sealing members are arranged, respectively, in walls through which the rod extends to partition the supply liquid-side pumping chamber and the supply liquid-side sub-pumping chamber as well as the waste liquid-side pumping chamber and the waste liquid-side sub-pumping chamber.