What are the common sensor failures and their solutions for brushless motor motor fully automatic rotor skimmer?
The common sensor failures of brushless motor motor automatic rotor skimmer and their solutions are as follows:
1, photoelectric sensor failure
l Failure phenomenon
Mis-detection: When there is no rotor passing by, the photoelectric sensor outputs the detection signal, which leads to the malfunctioning of the reclaimer, such as wrongly starting the reclaiming program or wrongly counting.
Missing detection: When the rotor passes through the detection area of the photoelectric sensor, the sensor does not output signal, which makes the reclaimer unable to perform normal reclaiming operation, and may lead to rotor accumulation or incomplete reclaiming.
l Failure causes
Dust blocking: After a long time of use, the surface of the transmitting or receiving end of the photoelectric sensor accumulates a lot of dust and other debris, which affects the transmission and reception of light.
Installation position offset: vibration during the operation of the equipment and other reasons, so that the photoelectric sensor installation position offset, resulting in the detection of optical path deviation.
Sensor aging: photoelectric sensors used for too long, the performance of the internal photoelectric components decline, the sensitivity is reduced.
l Solution
Clean the sensor: regularly use a clean soft cloth or compressed air to clean the transmitting and receiving ends of the photoelectric sensor to ensure that the optical path is smooth.
Adjust the installation position: Check the installation position of the sensor, use a level or other tools to recalibrate to ensure that it is in the correct detection position, and tighten the mounting bolts to prevent further offset.
Replacement of sensors: If it is determined that the sensor aging problems, timely replacement of new photoelectric sensors of the same type, and re-commissioning and calibration.
2、Proximity sensor failure
l Failure phenomenon
Signal instability: the signal output from the proximity sensor is sporadic, leading to inaccurate judgment of the position of the rotor of the reclaimer, there may be incoherent reclaiming action or rotor placement position deviation.
Abnormal detection distance: the rotor can be accurately detected within a certain distance, but suddenly the detection distance is shortened or longer, affecting the normal workflow of the skimmer.
l Failure causes
Electromagnetic interference: there are strong electromagnetic fields around, such as other motors, frequency converters and other equipment generated by the interference, affecting the normal work of the proximity sensor.
Sensor damage: the electronic components inside the proximity sensor are damaged, such as short-circuit and disconnection of the sensing coil.
Ambient temperature changes: the ambient temperature is too high or too low, beyond the normal operating temperature range of the proximity sensor, resulting in changes in its performance.
l Solution
Anti-interference measures: the signal line of the proximity sensor using shielded wire, and the shielding layer is reliably grounded, while trying to separate the sensor from other strong electromagnetic equipment at a certain distance.
Repair or replacement of the sensor: the use of professional testing tools to check the internal circuitry of the sensor, such as found damaged components, repair or direct replacement of new sensors.
Temperature control: If the ambient temperature problem is more prominent, consider installing heat dissipation or insulation devices for the sensor, so that it works within the normal temperature range.
3, pressure sensor failure
l Failure phenomenon
Pressure display abnormality: the pressure value displayed by the pressure sensor does not correspond to the actual pressure, may display too high or too low, resulting in inaccurate clamping force or conveyor force control of the collector on the rotor.
No pressure signal output: the pressure sensor can not send the pressure signal to the control system of the skimmer, so that the skimmer can not carry out the corresponding operation according to the pressure situation, such as not being able to judge whether the rotor has been clamped.
l Failure causes
Pipe blockage: The connecting pipe between the pressure sensor and the measured pressure source is blocked, resulting in the pressure not being transmitted to the sensor normally.
Sensor Zero Drift: After long-term use, the pressure sensor may experience zero drift phenomenon, making the measured value deviation.
Pressure overload: In the course of use, the pressure sensor is subjected to pressure exceeding its rated pressure range, resulting in sensor damage.
l Solution
Unclogging pipes: Check the connecting pipes, clear the blockages and ensure that the pressure transmission channel is unobstructed.
Calibrate the sensor: Use professional pressure calibration equipment to calibrate the pressure sensor, adjust the zero point and range, so as to restore its normal measurement accuracy.
Replacement of the sensor: If the sensor is damaged due to pressure overload, etc., it should be replaced in time with a new pressure sensor and adjust the pressure parameter settings according to the actual situation.
4、Displacement sensor failure
l Failure phenomenon
Inaccurate displacement measurement: The displacement of the rotor measured by the displacement sensor has a large deviation from the actual displacement, which leads to inaccurate position of the reclaimer during reclaiming, discharging and other operations, and may cause the rotor to be placed incorrectly or collide with other parts.
Sensor output signal interruption: the displacement sensor suddenly stops outputting signals during the working process, and the skimmer can not obtain the displacement information of the rotor, so it can not carry out normal automated operation.
l Failure causes
Loose mechanical connection: the mechanical connection between the displacement sensor and the measured object (e.g. rotor conveyor) is loose, resulting in inaccurate measurement or signal interruption.
Faulty electrical connection: Electrical problems such as poor contact, disconnection or short circuit of the sensor's power line or signal line affect the normal operation of the sensor.
Sensor internal failure: the displacement sensor internal electronic components are damaged, potentiometer wear, etc., resulting in its inability to properly measure and output displacement signals.
l Solution
Tighten the mechanical connection: Check and tighten the mechanical connection between the displacement sensor and the related components to ensure that the connection is firm and reliable, without loosening.
Check the electrical connection: Check the power and signal cables of the sensor carefully, repair or replace the damaged wires to ensure a good electrical connection, and check whether the plugs and sockets are in good contact, clean or replace them if necessary.
Repair or replace the sensor: disassemble and inspect the displacement sensor, if the internal components are found to be damaged, try to repair or directly replace the sensor with a new one, which needs to be accurately calibrated and debugged after replacement.
※ If you still can't solve the problem by the above ways and means, please contact the technical specialist of Xinhui Electromechanical Equipment Co., Ltd. through the page chat tool to seek help.
