Gearless Diaphragm Pump Drive for Dosing Precision
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Solution Overview
Problem
Diaphragm pumps face challenges in cost efficiency and dosing capabilities, particularly in applications requiring precise and constant fluid delivery, such as detergent dosage systems.
Innovation Solution
A gearless diaphragm pump design featuring a hybrid stepper motor drive with an eccentric connection, a control unit, and a detector unit for precise positioning and speed modulation, eliminating the need for a gearbox to enhance efficiency, reliability, and dosing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a gearbox is used in the driving means, then the diaphragm pump can achieve controlled reciprocating motion, but the manufacturing costs increase and the device complexity increases
Solution Approach 1:
The patent removes the gearbox from the driving means, extracting the unnecessary intermediate transmission component. The electric motor directly drives the diaphragm through a simplified mechanical linkage, eliminating the gearbox and its associated manufacturing costs and complexity while maintaining the required reciprocating motion control.
Solution Approach 2:
The patent replaces the mechanical gearbox system with a direct-drive mechanism where the electric motor's rotational motion is converted to reciprocating motion through a simplified linkage system, substituting complex mechanical gear transmission with a more efficient direct actuation system.
2Loss of energy
If a gearbox is used in the driving means, then the diaphragm pump can achieve controlled reciprocating motion, but the efficiency decreases due to transmission losses
Solution Approach 1:
The gearbox is extracted from the system, removing the source of transmission losses. The direct-drive configuration eliminates gear meshing losses, bearing losses in the gearbox, and other energy dissipation mechanisms associated with intermediate transmission components.
Solution Approach 2:
The complex mechanical gear transmission system is replaced with a direct-drive mechanism, substituting the inefficient multi-stage power transmission with a simplified direct coupling that minimizes energy loss while maintaining motion control.
3Object-affected harmful factors
If a gearbox is used in the driving means, then the diaphragm pump can achieve controlled reciprocating motion, but the noise increases
Solution Approach 1:
The gearbox is removed from the system, extracting the primary noise source. Without gear meshing, gear tooth impacts, and gearbox housing vibrations, the overall noise level of the diaphragm pump is significantly reduced while the device maintains its functionality through the simplified direct-drive system.
4Reliability
If a gearbox is used in the driving means, then the diaphragm pump can achieve controlled reciprocating motion, but the reliability decreases due to more internal parts
Solution Approach 1:
The gearbox is extracted from the driving means, removing multiple internal parts that could fail. The direct-drive configuration eliminates gears, gear shafts, gear bearings, and gearbox housing, significantly reducing the number of potential failure points and improving overall system reliability.
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 significantly reduces manufacturing costs, increases efficiency, and improves dosing capabilities by directly driving the diaphragm with a gearless mechanism, allowing for precise control and reduced noise, while maintaining reliability and enhancing dosing precision.
Implementation Method 1
A gearless diaphragm pump design featuring a hybrid stepper motor drive with an eccentric connection
Data Source
AI summary
A diaphragm pump (10), in particular for use as a detergent dosage pump, comprises a pump housing (12) with at least a first check valve (14) and a second check valve (16), a fluid chamber (18), a diaphragm (20) defining a wall of the fluid chamber (18) and reciprocatingly movable, driving means (28) with a driving shaft (30) for reciprocating said diaphragm (20), a control unit (36), wherein the driving means (28) is connected to the diaphragm (20) by an eccentric (26) and a con rod (24), wherein the driving means (28) is configured as a gearless drive to directly reciprocate the diaphragm (20). The diaphragm pump (10) according to the invention offers increased cost efficiency and further it is possible to increase the dosing capabilities of the diaphragm pump (10).