Compact Dual Rocking Piston Pump Single Bracket Design
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Solution Overview
Problem
Conventional dual rocking piston pumps experience noise and vibration due to imbalance caused by pistons with different outputs, leading to increased parts, weight, and manufacturing costs, while requiring a compact and lightweight design for medical applications.
Innovation Solution
A dual rocking piston pump design featuring a single bracket supporting both bearings and a rotor shaft, eliminating the need for a rear bell housing, with eccentrically mounted connecting rods and a stator supported by a hub and support members, ensuring balanced operation and reduced size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional dual rocking piston pumps use separate support structures for each bearing and include a rear bell housing, then structural stability is improved, but device complexity and number of parts increase
Solution Approach 1:
The patent merges multiple support functions into a single bracket structure that supports both bearings and the rotor shaft. This consolidation reduces the number of separate parts while maintaining structural stability, directly addressing the contradiction between structural integrity and device complexity.
Solution Approach 2:
The single bracket serves multiple functions: supporting the first bearing, supporting the second bearing, and supporting the rotor shaft. This multi-functional design eliminates the need for separate support structures and rear bell housing, reducing part count while maintaining stability.
2Reliability
If conventional dual rocking piston pumps include rear bell housing and multiple support structures, then bearing support is improved, but weight increases
Solution Approach 1:
By combining the support functions for both bearings and the rotor shaft into a single bracket, the patent eliminates redundant structural elements and rear bell housing, thereby reducing overall weight while maintaining reliable bearing support.
Solution Approach 2:
The patent extracts and eliminates the rear bell housing from the conventional design, removing unnecessary weight while retaining essential bearing support functions through the simplified single bracket structure.
3Adaptability or versatility
If conventional dual rocking piston pumps use unequal piston strokes for different outputs, then application versatility is improved, but vibration and noise increase
Solution Approach 1:
The patent employs counterbalancing mechanisms where the bracket and support structure are designed to offset the unequal forces generated by pistons with different strokes. This counterbalancing reduces vibration and noise while maintaining the versatility of unequal piston outputs.
Solution Approach 2:
The patent accepts and designs around the asymmetric forces generated by unequal piston strokes rather than attempting to symmetrize the system. The single bracket and support structure are specifically designed to handle asymmetric loading conditions, reducing vibration while maintaining different output capabilities.
4Adaptability or versatility
If dual rocking piston pumps are designed with unequal piston strokes, then application flexibility is improved, but balance deteriorates
Solution Approach 1:
The single bracket and support structure are designed with counterbalancing features that compensate for the imbalance created by unequal piston strokes, maintaining operational stability while preserving application flexibility.
Solution Approach 2:
The universal bracket structure is designed to handle various loading conditions including unequal piston forces, providing both balance and flexibility across different application scenarios.
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 design achieves balanced operation, reduced noise and vibration, lower manufacturing costs, and a compact, lightweight structure without compromising reliability or efficiency, enhancing the pump's integration into medical and other applications.
Implementation Method 1
The rotor shaft passes through a first bearing and a second bearing
Implementation Method 2
a first piston comprising a first connecting rod eccentrically mounted to a rotor shaft and a second piston comprising a second connecting rod eccentrically mounted to the rotor shaft
Data Source
AI summary
A dual rocking piston pump which includes a first piston with a first connecting rod eccentrically mounted to a rotor shaft and a second piston with a second connecting rod eccentrically mounted to the rotor shaft. The rotor shaft passes through a first bearing and a second bearing before being connected to a rotor body. The rotor body is disposed within a stator. The first and second bearings and stator are supported by a bracket. The bracket includes a hub which, in turn includes a first end connected to a wall at an opening in the wall. The hub also includes a second end. The first end of the hub supports the first bearing at the wall and the second end of the hub supports the second bearing. Both the first and second bearings are disposed in front of the motor or in front of both the rotor and stator. Because support for the rotor is provided entirely in front of the motor, no rear bell housing is required and because a single bracket supports the bearings, rotor and stator, fewer parts are required thereby making the pump lighter and more compact.