Self-Powered Rotor Sensor for Centrifugal Separator Cleaning
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Solution Overview
Problem
Centrifugal separators lack an effective means to indicate when they require cleaning without stopping operation or visual inspection, leading to potential premature wear of components and inefficient maintenance.
Innovation Solution
A self-powered electrical rotation sensor system with a first coil on the rotor and a second coil on the casing, along with voltage sensing means, detects voltage oscillations to indicate cleaning readiness and automatically charges a battery using a permanent magnet, allowing for intermittent operation and power conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a centrifugal separator operates without a service readiness indicator, then the device complexity is reduced, but the loss of information about cleaning needs increases leading to premature component wear or inefficient maintenance
Solution Approach 1:
The rotor serves as its own sensor by utilizing its rotational motion to generate voltage through electromagnetic induction with the stationary coil. The accumulated material on the rotor directly affects the voltage signal, eliminating the need for separate sensing components and making the system self-diagnosing
Solution Approach 2:
The patent replaces complex mechanical or optical sensing systems with an electromagnetic induction-based voltage sensing system. The rotation of the rotor with accumulated material induces voltage in the stationary coil, providing a simple electrical signal that indicates service readiness
2Reliability
If an external power source is provided for the sensor system, then the measurement precision and reliability are improved, but the device complexity and power requirements increase
Solution Approach 1:
The rotor's rotational motion during normal separator operation generates electrical energy through electromagnetic induction with the stationary coil. This self-generated power charges a battery that supplies power to the voltage sensing means, making the system self-powered without external power sources
Solution Approach 2:
The system continuously generates power during rotor rotation through electromagnetic induction. The battery is continuously charged during operation, ensuring uninterrupted power supply for the voltage sensing means and maintaining reliable operation throughout the service interval
3Measurement precision
If the centrifugal separator requires stopping operation for visual inspection, then the measurement precision of contaminant accumulation is improved, but the loss of time and productivity decrease
Solution Approach 1:
The voltage sensing means continuously monitors the voltage signal generated by rotor rotation, providing real-time feedback about contaminant accumulation. When the voltage oscillation pattern indicates sufficient accumulation, the system signals that servicing is needed, enabling timely maintenance without stopping operation for inspection
Solution Approach 2:
The patent replaces manual visual inspection with an automated electrical sensing system. The voltage signal generated during normal rotation provides continuous information about contaminant levels, eliminating the need to stop the separator for visual checks
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
Enables the centrifugal separator to indicate cleaning readiness and monitor rotor speed without external power, reducing maintenance downtime and component wear while minimizing power consumption.
Implementation Method 1
a permanent magnet to the rotor whereby a battery power source mounted on the casing can be automatically charged via the second circuit means upon rotation of the rotor
Implementation Method 2
an electrical rotation sensor is provided by a first electric circuit means mounted to the rotor and including a first coil, a second electric circuit means mounted to the casing and including a second coil connectable to a power source, and voltage sensing means associated with the second circuit to detect voltage oscillation induced in the second coil upon rotation of the rotor
Data Source
AI summary
A rotor is mounted in a stationary casing of a centrifugal separator. An electrical rotation sensor with a first electric coil mounted on the rotor and a second electric coil, connectable to a power source and mounted on the casing, is provided. A processor associated with the second coil detects voltage oscillation induced in the second coil when the rotor rotates to calculate and display rotor speed. The first coil is connected in a circuit including electrodes exposed to the interior of the rotor at a predetermined position. The voltage across the second coil changes when the electrodes are contacted by accumulated material in the interior of the rotor. This change is detected to provide an indication that cleaning of the rotor is required. A permanent magnet is mounted on the rotor and causes automatic charging of the battery via the stator coil when the rotor rotates.