Rigid Piston-Actuator Assembly Pendulum Compensation
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Solution Overview
Problem
Conventional pumps face challenges in maintaining mechanical stability and dealing with part and interface tolerances, especially at high pressure, which requires complex and costly bearing arrangements to prevent redundant guidance and forces.
Innovation Solution
A pump design featuring a rigid piston actuator assembly that performs a pendulum-type compensation motion around a common rigid axis, utilizing a simplified bearing arrangement with a single actuator bearing and a volume-type piston bearing to reduce the number of bearing positions and mechanical fit requirements, allowing for high-pressure fluid pumping while tolerating part and interface tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional pump design with multiple bearing positions and redundant guidance is used, then mechanical stability at high pressure is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates redundant bearing positions and guidance elements from the pump design. By identifying that only one actuator bearing and one volume-type piston bearing are necessary, the patent removes unnecessary mechanical components while maintaining stability through the pendulum-type compensation motion of the rigid piston-actuator assembly.
Solution Approach 2:
The invention introduces dynamic tolerance compensation through pendulum-type motion. The rigid piston-actuator assembly is allowed to perform controlled pendulum movements around a common rigid axis, dynamically adapting to part and interface tolerances while maintaining mechanical stability during high-pressure operation.
2Reliability
If tight manufacturing tolerances and precise mechanical fits are specified, then pump reliability at high pressure is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The invention changes the operational parameters of the piston-actuator assembly by allowing controlled pendulum motion. This parameter change enables the system to tolerate broader part and interface tolerances while maintaining reliability, as the dynamic motion compensates for manufacturing variations rather than requiring tight precision.
Solution Approach 2:
The rigid piston-actuator assembly performs self-compensation for tolerances through its own pendulum-type motion. The system automatically adapts to manufacturing variations without requiring external adjustment or highly precise manufacturing, as the controlled swinging motion inherently accommodates tolerance deviations.
3Stability of the object's composition
If multiple bearing positions are used to support the piston assembly and actuator, then mechanical stability is improved, but device complexity and space requirements increase
Solution Approach 1:
The invention merges the support functions into a minimal bearing arrangement consisting of only one actuator bearing and one volume-type piston bearing. By combining the necessary support functions into these two strategic bearing positions, the patent reduces the spatial footprint while maintaining mechanical stability through the rigid piston-actuator assembly's controlled pendulum motion.
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 enhances pump reliability and reduces manufacturing costs by allowing broad tolerance acceptance, maintaining mechanical stability and efficiency even at high pressures, and simplifies the bearing arrangement, reducing the complexity and space requirements.
Implementation Method 1
the piston-actuator-assembly is capable of performing a pendulum-type compensation motion (in particular to compensate for part and/or interface tolerances, more particularly while mounting or maintaining the pump) around a pendulum point at the piston actuator on the common rigid axis
Data Source
AI summary
A pump for pumping fluid, wherein the pump includes a working chamber, a piston assembly configured for reciprocating within the working chamber to thereby displace fluid, a piston actuator being rigidly assembled with the piston assembly at least in a working mode of the pump to thereby transmit drive energy to the piston assembly to reciprocate along a common rigid axis of the piston-actuator-assembly, and a bearing arrangement bearing the piston assembly and the piston actuator in the pump so that the piston-actuator-assembly provided by the piston assembly and the piston actuator is capable of performing a pendulum-type compensation motion around a pendulum point at the piston actuator on the common rigid axis.