MotorSystem maintenance information technology companies have become more complete with the development of China's scientific and technological management level. The work of technicians can study the main equipment problems of the motor based on the control of the motor and the maintenance professional technology. The second use and maintenance can ensure that a motor is in practice. In the process of operation, the teaching effect will be gradually improved.The motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction.Explosion-proof motor is a kind of motor that can be used in flammable and explosive plants, and it does not generate electric sparks during operation.Explosion-proof motorsMainly used in coal mines, petroleum and natural gas, petrochemical and chemical industries.In addition, it is also widely used in sectors such as textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, and medicine.Frequency conversion speed motorA general term for motors driven by frequency converters.In fact, the motor designed for the frequency converter is a special frequency conversion motor. The motor can achieve different speeds and torques under the drive of the frequency converter to adapt to the changes in the demand of the load.Below, our article editor specially summarizes the basic education knowledge of maintenance theory that affects the motor.0.1. Installation of the brush: The brush is installed in the brush holder to ensure that students can realize economical and free choice of movement up and down. The gap time between the side of the brush and the inner wall of the brush holder should be between 0.3-2 mm to prevent the brush from getting stuck in the brush holder. In response to the excessive gap, it produces a positive swing.The distance between the lower edge of the brush holder and the surface of the collector ring (slip ring) should be within 3-30 mm. The distance should not be too small, because the brush holder is easy to touch the reversing brush; if it is too large, the brush is easy to flip and cause Damage has occurred.When grinding the arc surface of the brush, apply analytical glass sandpaper (do not use emery paper), cover it on the converter or slip ring, apply the same design pressure as the spring during operation to the brush, and start rotating along the motor Twitch the sandpaper in the direction (the brush should be lifted when pulling back the sandpaper) until the arc of the brush matches the basic condition of the slip ring (slip ring), remove the ground powder and sand particles, and the motor idling for 25 minutes, then XNUMX% When the brushes and the slip ring (slip ring) are in good contact, the motor model can be put into normal production and operation in the society.
2. The pressure of the brush: We should try our best to have uniform working pressure on the spring, especially for brushes that can be used in parallel, otherwise it will cause uneven load on each brush.Different control motors have different spring system pressure management.For motors with higher requirements for circular motion speed, the brush pressure should also be appropriately developed and increased, but excessive pressure will increase China and the wear of the brush.The brush pressure can be analyzed and adjusted with reference to the data information in the performance table of brush technology products.3. Replace with a new brush: The brush needs to be replaced if 1/2 or XNUMX/XNUMX of the original height is removed.When replacing the new brushes, all the old brushes should be removed from the motor at the same time, and the new brushes should be the same as the original brushes in terms of model and specifications.For the slip ring (slip ring) of the same motor, it is not allowed to mix two or two types of brushes based on the above types.XNUMX. Maintenance of the brush: When the motor starts to run, the surface phenomenon of the slip ring (slip ring) often needs to maintain a layer of bright brown oxidation to form a thin film, so as to stabilize the contact through the brush and the AC voltage will be low Friction coefficient, reduce the wear of the collector ring (slip ring) due to the brush.If the oxide film is too thick, the contact voltage will increase, causing the brush to overheat and increase the loss of the enterprise's electrical equipment.If the oxide film is too thin, it will further aggravate the wear of the brushes and the slip ring (slip ring), and it is easy to produce a strong spark.
At 25% of the rated load of the motor, the formation of the oxide film is easier.The thickness of the oxide film is related to the use environment of the motor.In the case of high temperature, high humidity, and corrosive gas, the slip ring (slip ring) is easy to form a thick oxide film.In contrast, in plateau areas and thin air, the collector ring (slip ring) is not easy to form an oxide film.Brushes used in special environments should be brushes treated with appropriate impregnating agents.Continuous working motor, brush load should not exceed the allowable value in the technical performance table.All kinds of brushes have self-lubricating properties, so it is strictly forbidden to apply oil, wax and other lubricants on the collector ring (slip ring).
