Sanitary Crusher Pump Speed Control for Noise Reduction
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Solution Overview
Problem
Current sanitary grinders emit significant hydraulic noise due to constant rotational speed, which does not adapt to varying installation conditions, leading to inefficient operation and potential pump aging.
Innovation Solution
A sanitary grinder with a control system that adjusts the pump's operational parameters, such as rotational speed and torque, based on historical values of the evacuation pump's performance, allowing it to adapt to real-time needs and reduce noise by optimizing the pumping cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pump operates at constant maximum rotational speed, then the output flow rate is maximum, but significant hydraulic noise is generated
Solution Approach 1:
The pump's rotational speed is changed from constant to variable, dynamically adapting to actual drainage needs. The control system adjusts speed based on historical operating parameters, allowing the pump to operate at lower speeds when full capacity is not required, thereby reducing hydraulic noise while maintaining adequate productivity.
Solution Approach 2:
The operational parameters of the pump, specifically rotational speed, are changed from fixed maximum values to variable values. By modifying the speed parameter based on historical data and actual needs, the system achieves lower noise operation during periods when maximum flow rate is not necessary.
2Productivity
If the pump operates at maximum speed continuously, then the evacuation capability is maximized, but the pump aging accelerates
Solution Approach 1:
The pump operates dynamically with variable speed rather than continuously at maximum speed. By adapting the rotational speed to actual drainage requirements based on historical operating parameters, the pump experiences reduced mechanical stress and wear during low-demand periods, thereby extending its operational lifespan while maintaining evacuation capability when needed.
3Adaptability or versatility
If the pump operates at constant maximum speed, then the response to varying installation conditions is poor, but the system structure remains simple
Solution Approach 1:
The control system incorporates feedback mechanisms that use historical operating parameters to adapt the pump's rotational speed to varying installation conditions. By continuously monitoring and adjusting based on past performance data, the system achieves high adaptability to different drainage requirements and installation scenarios while maintaining a relatively simple control architecture.
Data Source
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AI summary
Sanitary macerator (10) comprising - a tank (12) for receiving water to be evacuated, - a maceration unit (20) comprising a water evacuation pump (16) and a pump drive motor (30), and - a motor control device (50) on a given pumping cycle as a function of at least one value of an operating parameter of the evacuation pump at a past pumping cycle, called the "historical value".