Pump Impeller Reverse Rotation for Automatic Blockage Clearing
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Solution Overview
Problem
Pumps can fail to drain properly due to objects blocking the impeller, leading to improper rotation and potential failure.
Innovation Solution
A pump system with an impeller that rotates fluid in a common direction regardless of its rotation, equipped with a controller that detects potential failure and reverses the polarity of the electric motor to reverse the impeller's rotation, thereby clearing blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the impeller rotates in a fixed direction to move fluid through the pump, then the pump can maintain consistent drainage performance, but objects blocking the impeller can cause failure to rotate and improper drainage
Solution Approach 1:
The pump system dynamically changes the impeller rotation direction based on detected blockages. The controller monitors impeller rotation and automatically reverses polarity when blockage is detected, allowing the system to adapt from fixed-direction operation to reversible operation to maintain reliability while clearing obstructions.
2Reliability
If the pump uses a standard electric motor configuration, then the motor is simple and reliable, but it cannot clear blockages by reversing impeller rotation
Solution Approach 1:
The system changes the electrical parameter (polarity) of the motor to reverse impeller rotation direction. By switching the polarity of the electric motor, the impeller rotates in reverse to clear blockages, adding blockage clearance capability while maintaining relatively simple motor hardware with only control circuitry modifications.
3Productivity
If the impeller is designed to move fluid in a common direction regardless of rotation direction, then drainage consistency is improved, but the system cannot clear blockages through reverse rotation
Solution Approach 1:
The pump employs periodic reverse rotation action to clear blockages. The controller detects blockages and initiates periodic reverse rotation cycles, allowing the impeller to move fluid efficiently in the common direction during normal operation while periodically reversing to clear obstructions, thus maintaining both drainage efficiency and blockage handling 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 system effectively addresses impeller blockages by reversing polarity to ensure continuous and reliable drainage, enhancing pump performance and reliability.
Implementation Method 1
The electric motor configured to drive the impeller
Implementation Method 2
reverse polarity of current to the electric motor to reverse rotation of the impeller
Data Source
AI summary
A pump is provided that reverses polarity of the current to reverse the rotation of an impeller on failure to clear objects that may be blocking the impeller. The pump may have an impeller configured to move fluid through the pump in a common direction regardless of which way the impeller rotates, an electric motor configured to drive the impeller, and a controller configured to detect potential failure of the impeller to rotate, and, in response to detection of the potential failure, reverse polarity of current to the electric motor to reverse rotation of the impeller.