Troubleshooting methods

Audio-diagnostic method. When the equipment is in normal operation, the accompanying sound always has a certain rhythm and rhythm. As long as you are familiar with and master these normal rhythms and rhythms, through the human auditory function can be compared to the equipment whether there is a heavy, miscellaneous, strange, chaotic abnormal noise, to determine the internal loosening of the equipment, impact, imbalance and other hidden dangers. Tap the parts with a hand hammer, listen to whether the rupture murmur, you can judge whether there is no cracks produced. Electronic stethoscope is a vibration acceleration sensor. It converts the vibration condition of the equipment into an electrical signal and amplifies it. Workers listen to the vibration sound of the running equipment with earphones to realize the qualitative measurement of the sound. By measuring the signals at the same measuring point, at different periods, at the same speed, and under the same working conditions, and making comparisons, it is possible to determine whether there is a fault in the equipment. When the headset appears crisp and sharp noise, it means that the vibration frequency is high, and it is generally a relatively small size, relatively high strength parts occurring local defects or tiny cracks. When the headset emits turbid low noise, indicating that the vibration frequency is low, generally a relatively large size, relatively low strength parts occur larger cracks or defects. When the noise coming out of the headset is enhanced than usual, indicating that the fault is developing, the louder the sound, the more serious the fault. When the noise coming out of the headset is messy and irregular intermittently, indicating that there are parts or components have been loosened.

Two, touch measurement method. With the touch of the human hand can monitor the temperature of the equipment, vibration and gap changes. Nerve fibers in the human hand is more sensitive to temperature, can be more accurately distinguish the temperature within 80 ℃. When the temperature of the machine parts at about 0 ℃, the hand feels cold, if the touch time is longer will produce a tingling sensation of pain. 10 ℃ or so, the hand feels cooler, but generally tolerated. 20 ℃ or so, the hand feels a little cooler, with the prolongation of the contact time, the hand feels warmer. Around 30 ℃, the hand feels slightly warm, have a sense of comfort. 40 ℃, the hand feels hot, have a slightly hot feeling. 50 ℃, the hand feels hot, if the palm presses for a longer time, there will be sweaty. 60 ℃, the hand feels hot, but generally can be tolerated for a long period of time 10s. Around 70 ℃, the hand feels so hot that it burns, and generally can only tolerate 3s long time, and the touch of the hand will quickly. Reddening. When touching, should try to touch and then fine touch, in order to estimate the temperature rise of the machine parts. Shaking the machine parts by hand can feel the size of the gap of 0.1mm-0.3mm. Touching the machine parts by hand can feel the strong and weak changes in vibration and whether to produce impact, as well as the creeping situation of the skateboard. With a thermometer equipped with a surface thermocouple probe to measure the rolling bearings, plain bearings, spindle box, motor and other parts of the surface temperature, it has to determine the location of thermal anomalies quickly, accurate data, touch the process of measurement of the convenience of the characteristics.

Three, observation method. Human vision can observe the machine parts on the equipment with or without loose, cracks and other damage, etc.; you can check whether the lubrication is normal, there is no dry friction and running, bubbling, dripping, leaking phenomenon; you can view the oil tank deposits in the amount of metal abrasive particles, size and characteristics, in order to determine the wear and tear of the relevant parts;

Commonly used methods of equipment troubleshooting

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