Dual Diaphragm Pump Control for Stable Pressure and Flow
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Solution Overview
Problem
Dual diaphragm reciprocating fluid pumps experience pressure deviations and stalling due to insufficient or unbalanced pressure differentials between fluid and air chambers, leading to operational inefficiencies and the need for costly supplemental devices to stabilize fluid flow.
Innovation Solution
A diaphragm pump system with independently operable diaphragm assemblies and a control arrangement that balances the operation of each diaphragm to mitigate pressure and flow spikes, using a control system to synchronize the intake and discharge strokes of each diaphragm to achieve uniform fluid discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If dual diaphragm reciprocating fluid pumps are operated with synchronized intake and discharge strokes, then pressure and flow uniformity is improved, but device complexity increases due to the need for control arrangements
Solution Approach 1:
The pump system is divided into two independently controllable diaphragm assemblies, each with its own drive mechanism. This segmentation allows independent control of each diaphragm's operation, enabling the first diaphragm to discharge while the second diaphragm is in intake stroke, thereby smoothing pressure fluctuations and achieving more uniform fluid output without requiring complex centralized control
Solution Approach 2:
The control system utilizes periodic alternation between the two diaphragm assemblies, where one diaphragm performs intake stroke while the other performs discharge stroke, and they periodically swap roles. This periodic action ensures continuous fluid discharge with reduced pressure deviations, maintaining stable flow uniformity through rhythmic coordination rather than complex continuous control
2Stability of the object's composition
If independently operable diaphragm assemblies are used, then pressure deviations are reduced, but manufacturing complexity increases
Solution Approach 1:
The pump system employs two diaphragm assemblies that are substantially identical in structure and configuration, with each assembly being a copy of the other. This copying approach simplifies manufacturing by using standardized, interchangeable components while still achieving independent operation and pressure stability through coordinated control of the replicated assemblies
Solution Approach 2:
The control system adjusts operational parameters such as the timing, stroke duration, and pressure differential for each independently operable diaphragm assembly. By varying these parameters, the system optimizes pressure stability and prevents deviations without requiring fundamentally different or more complex hardware designs
3Stability of the object's composition
If supplemental pressure stabilizing devices are added, then fluid flow stability is improved, but device complexity and cost increase
Solution Approach 1:
The dual diaphragm pump system is designed to self-regulate fluid flow stability through its inherent dual-assembly architecture. By coordinating the operation of the two diaphragms so that one discharges while the other intakes, the system automatically compensates for pressure fluctuations without requiring external supplemental stabilizing devices, thereby maintaining fluid flow stability while avoiding additional complexity
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 system effectively stabilizes fluid flow and pressure, reducing operational inefficiencies and eliminating the need for additional pressure stabilizing devices, while maintaining consistent output pressure and flow.
Implementation Method 1
A control arrangement is connected to the discrete drive arrangements and configured to control the cyclic operation of the pair of working fluid diaphragm pump assemblies to mitigate pulsatile effects in the combined working fluid flow when the discharges of the working fluid flows associated with operation of the pair of working fluid diaphragm pump assemblies is combined
Data Source
AI summary
A diaphragm pump system that includes a pair of working fluid diaphragm pump assemblies that are each fluidly connected to a working fluid flow. Each working fluid diaphragm pump assembly is operationally associated with a discrete drive arrangement that is fluidly isolated from the working fluid flow that is moved during operation of the pump system. A control arrangement is connected to the discrete drive arrangements and configured to control the cyclic operation of the pair of working fluid diaphragm pump assemblies to mitigate pulsatile effects in the combined working fluid flow when the discharges of the working fluid flows associated with operation of the pair of working fluid diaphragm pump assemblies is combined.