Coating Agent Pump with Integrated Position Detection
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Solution Overview
Problem
Existing coating agent pumps in painting systems face high energy consumption, pulsation in paint flow, need for additional safety and pressure measurement devices, limited dosing accuracy, and inadequate detection of pumping defects due to wear.
Innovation Solution
A coating agent pump with an electric drive motor, integrated path and torque measuring systems for precise piston position detection, a control unit for accurate dosing and pulsation reduction, a pressure measuring device for pressure monitoring, and a monitoring system for detecting malfunctions, all integrated into a double piston pump design with a synchronous motor and explosion-protected housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If compressed air-powered piston pumps are used, then paint can be promoted, but energy consumption is high
Solution Approach 1:
The patent replaces the compressed air-powered mechanical system with an electromotive driven double piston pump system. This substitution allows for more efficient energy conversion and control, reducing the high energy consumption associated with compressed air systems while maintaining effective paint promotion capability.
Solution Approach 2:
The patent employs variable speed control of the electric drive motor to optimize energy consumption. By adjusting the rotational speed parameter according to actual painting requirements, the system avoids constant high energy input, thereby reducing overall energy consumption while maintaining effective paint delivery.
2Power
If asynchronous motors are used in electromotive piston pumps, then paint promotion is achieved, but energy consumption is high in lower speed range
Solution Approach 1:
The patent uses synchronous motors with variable speed control capability instead of fixed-speed asynchronous motors. This allows the system to operate at optimal efficiency points across different speed ranges, particularly improving energy consumption characteristics in the lower speed range where asynchronous motors perform poorly.
Solution Approach 2:
The patent implements dynamic speed control of the electric drive motor to match actual painting demands. By continuously adjusting the motor speed parameter, the system maintains high efficiency operation and avoids the energy waste associated with operating asynchronous motors at suboptimal speeds.
3Productivity
If piston pumps with large lifting volume are used, then high paint delivery is achieved, but dosing accuracy is insufficient
Solution Approach 1:
The patent incorporates a path measuring system that provides feedback on the actual piston position during operation. This feedback mechanism enables real-time monitoring and correction of paint delivery, ensuring that even with large lifting volume, the dosing accuracy requirements are met through closed-loop control.
Solution Approach 2:
The patent replaces simple mechanical piston pumps with an electromotive driven system that uses electric motor control and electronic monitoring. This substitution enables precise control of piston movement and paint delivery, achieving both high volume capability and accurate dosing through electronic regulation rather than purely mechanical means.
4Reliability
If additional pressure sensors and overpressure switches are added, then safety is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into the existing control system. The control unit not only controls the drive motor but also monitors pressure conditions and provides overpressure protection. This multi-functionality approach maintains safety without requiring separate dedicated pressure sensors and overpressure switches, thereby avoiding increased device complexity.
Solution Approach 2:
The patent combines the pressure monitoring and overpressure protection functions with the existing control unit and drive system. By merging these safety functions into the already-present control infrastructure, the system achieves enhanced safety without adding separate measuring devices, thus avoiding increased complexity.
5Measurement precision
If path measuring system is integrated, then pump position detection precision is improved, but device complexity increases
Solution Approach 1:
The path measuring system is integrated into the existing control unit, which already performs multiple functions including motor control and pressure monitoring. This integration approach allows the control unit to handle both drive control and position measurement tasks, improving pump position detection precision without significantly increasing overall device complexity through shared hardware resources.
Data Source
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Figure 3~4
AI summary
The invention relates to a coating agent pump (1) for conveying a coating agent in a coating installation, in particular for conveying paint in a painting installation, comprising an electric drive motor (3) for driving the coating agent pump (1) so that the coating agent pump (1) continuously changes its pump position during operation. According to the invention, a path measuring system (5) is provided for quantitatively detecting the pump position of the coating agent pump (1).