NEWS CENTER

1. Auscultation method of box-type non-negative pressure water supply equipment
When the equipment is operating normally, the accompanying sound always has a certain rhythm and rhythm. By being familiar with and mastering these normal melodies and rhythms, the human auditory function can compare whether there are heavy, mixed, strange, chaotic and abnormal noises in the equipment, and determine whether there are looseness, impact, imbalance and other hidden dangers inside the equipment. Hit the parts with a hand hammer and listen for cracking noises to determine whether there are cracks.
The electronic stethoscope is a vibration acceleration sensor. It converts equipment vibration conditions into electrical signals and amplifies them. Workers use headphones to monitor the vibration sound of operating equipment to achieve qualitative measurement of sound.
Measure the signals at the same measuring point, different periods, the same speed, and the same working conditions, and compare them to determine whether the equipment is faulty.
When there is a crisp and high-pitched noise in the earphones, it means that the vibration frequency is high. Generally, there are local defects or tiny cracks in parts that are relatively small in size and relatively high in strength.
When turbid and low noise comes from the earphones, it means that the vibration frequency is low. Generally, there are large cracks or defects in parts that are relatively large in size and relatively low in strength.
When the noise from the headphones is stronger than usual, it means that the fault is developing. The louder the sound, the more serious the fault is.
When the noise coming from the headphones is random and intermittent, it means that some parts or components are loose.
2. Touch detection method of box-type non-negative pressure water supply equipment
The temperature, vibration and gap changes of the equipment can be monitored using the touch of human hands.
The nerve fibers in human hands are relatively sensitive to temperature and can accurately distinguish temperatures within 80°C.
When the temperature of the machine is about 0℃, it will feel cold to the touch. If it is touched for a long time, it will cause a biting pain.
When the temperature is around 10°C, it feels cool to the touch, but it is generally bearable. At about 20℃, the hand feels slightly cooler, and the contact time is extended, and the hand feels gradually warms up.
At about 30℃, it feels slightly warm and comfortable. At about 40℃, it feels hot and slightly hot.
When the temperature is around 50℃, it will feel hot to the touch. If you press it with your palm for a long time, you will feel sweaty.
When the temperature is around 60°C, it feels very hot to the touch, but it can generally be tolerated for 10 seconds. When the temperature is around 70°C, the hand will feel hot and painful. Generally, it can only be tolerated for 3 seconds, and the area touched by the hand will quickly turn red.
When touching, you should try and then touch carefully to estimate the temperature rise of the machine parts. You can feel the gap size of 0.1mm-0.3mm by shaking the parts by hand.
By touching the machine parts with your hands, you can feel the changes in vibration intensity, whether there is any impact, and the crawling condition of the slide.
Using a thermometer equipped with a surface thermocouple probe to measure the surface temperature of rolling bearings, sliding bearings, spindle boxes, motors and other mechanical parts has the characteristics of quickly determining the location of thermal anomalies, accurate data, and a convenient touch detection process.