Diaphragm Pump Motor Step-Out Origin Reset
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Solution Overview
Problem
Diaphragm pumps face challenges in maintaining discharge accuracy due to variations in detector mounting and housing processing accuracy, leading to fluctuations in product quality and increased manufacturing costs.
Innovation Solution
A diaphragm pump design that incorporates a motor-driven actuator and a control device capable of detecting a 'step-out' condition, allowing the diaphragm to reset its origin position without a detector, thereby enhancing discharge accuracy and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a detector is installed to return the diaphragm to the origin, then the discharge accuracy can be maintained, but the manufacturing cost increases and the device complexity increases
Solution Approach 1:
The patent removes the detector from the system entirely. Instead of using a detector to identify the origin position, the invention uses the motor's inherent step-out characteristic as a natural reference point. The control device detects when the motor steps out during reverse rotation and automatically sets this as the origin, eliminating the need for any detector hardware.
Solution Approach 2:
The motor itself provides the reference signal through its step-out phenomenon. The system uses its own operational characteristic (step-out) as the origin detection mechanism, rather than requiring an external detector. This self-service approach allows the motor to identify its own reference position without additional sensing components.
2Manufacturing precision
If a detector is installed to return the diaphragm to the origin, then the discharge accuracy can be maintained, but the manufacturing cost increases
Solution Approach 1:
The patent removes the detector from the system entirely. Instead of using a detector to identify the origin position, the invention uses the motor's inherent step-out characteristic as a natural reference point. The control device detects when the motor steps out during reverse rotation and automatically sets this as the origin, eliminating the need for any detector hardware.
Solution Approach 2:
The invention replaces the expensive detector with a software-based control algorithm that utilizes existing motor characteristics. The control device uses standard motor control signals to detect step-out conditions, converting a hardware solution into a software solution that leverages the motor's natural behavior rather than requiring additional expensive components.
3Ease of operation
If the origin is set based on detector mounting position, then the diaphragm can return to origin, but the discharge accuracy fluctuates due to mounting accuracy variations
Solution Approach 1:
The control device continuously monitors motor operation and detects the step-out condition as feedback signal. When the motor rotates in reverse and steps out, this provides automatic feedback that the origin has been reached. The system then stops reverse rotation and begins forward rotation from this detected origin point, ensuring consistent positioning without manual adjustment.
Solution Approach 2:
The invention changes the reference parameter from detector mounting position to motor step-out detection. Instead of relying on the physical position of a detector relative to the diaphragm, the system uses the motor's electrical characteristic (step-out) as the reference. This parameter change eliminates sensitivity to mechanical mounting variations.
Data Source
AI summary
A diaphragm pump includes a reciprocable diaphragm, an actuator including a motor, and a control device. The control device resets an origin of the diaphragm in a reciprocating direction, when detecting a step-out of the motor. After resetting the origin, the control device activates the actuator to move the diaphragm to the origin.