Piston Pump with Segmented Mechanism for Friction Reduction
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Solution Overview
Problem
Piston pumps in water flossers face high friction resistance due to greater load on the drive mechanism, leading to reduced battery life and inefficient cleaning fluid pumping.
Innovation Solution
A pumping assembly with at least two chambers of different inner diameters and a piston mechanism featuring a separation groove and connecting rod, which reduces contact area and friction while maintaining sealing performance, thereby reducing the load on the drive mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the piston mechanism contacts the chamber walls extensively to ensure sealing, then sealing performance is improved, but friction resistance increases and battery life decreases
Solution Approach 1:
The piston mechanism is divided into two functional segments: the piston head for sealing (maintaining contact with chamber wall) and the connecting end for transmission (reduced contact with chamber wall). This segmentation allows the sealing function to be isolated from the transmission function, reducing overall friction while maintaining sealing effectiveness.
Solution Approach 2:
Different parts of the piston mechanism have different contact characteristics with the chamber wall. The piston head maintains extensive contact for sealing, while the connecting end has reduced contact area. This local differentiation optimizes each region's function: sealing where needed, friction reduction where not needed.
2Force
If the piston mechanism size is reduced to lower friction, then friction resistance decreases, but sealing performance deteriorates
Solution Approach 1:
The piston mechanism is segmented into a piston head (for sealing) and a connecting end (for transmission). The piston head maintains sufficient size and contact area for effective sealing, while the connecting end has reduced dimensions to minimize friction. This segmentation allows optimized sizing for each function independently.
Solution Approach 2:
The piston mechanism exhibits local quality differentiation: the piston head portion has larger dimensions and maintains full contact with the chamber wall for sealing, while the connecting end portion has smaller dimensions and reduced contact for friction reduction. Each local region is optimized for its specific function.
3Use of energy by moving object
If the drive mechanism load is reduced to extend battery life, then energy consumption decreases, but pumping efficiency may be affected
Solution Approach 1:
By segmenting the piston mechanism into sealing and transmission functions, the friction load on the drive mechanism is reduced while the pumping action remains effective. The piston head ensures proper fluid displacement for pumping efficiency, while the reduced-friction connecting end lowers energy consumption.
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
The solution reduces friction resistance and power consumption, enhancing the efficiency of the piston pump and extending the battery life of the water flosser while maintaining effective sealing and cleaning performance.
Implementation Method 1
a piston mechanism successively extending through the at least two chambers, the piston mechanism being in slidable cooperation with walls of the chambers, and a gap being formed between a sidewall of part of the piston mechanism and the walls of the chambers
Implementation Method 2
At least part of the mating end is kept in sealing cooperation with a wall of a chamber with a smaller inner diameter of the at least two chambers
Data Source
AI summary
The present disclosure relates to a pumping assembly, a piston pump and a water flosser. The pumping assembly includes: a cylinder, at least two chambers with different inner diameters being provided in the cylinder; a piston mechanism successively extending through the at least two chambers, the piston mechanism being in slidable cooperation with walls of the chambers, and a gap being formed between a sidewall of part of the piston mechanism and the walls of the chambers; and a drive mechanism connected to the piston mechanism, the drive mechanism being configured to drive the piston mechanism to move.