Monitoring of vibration and noise When the machine is in normal operation, its vibration state parameters (such as frequency, amplitude, etc.) are within a certain range. When the machine fails, the form of vibration and its state parameter value will change greatly. Even with different levels of noise, the vibration measurement system can be used to diagnose the cause and location of the fault. The vibration monitoring technology is applicable to the friction pairs of bearings and gears of mechanical equipment, and also to the vibration of the unit caused by the unbalanced rotor of the rotating machinery and the misalignment of the rotor.
With the continuous promotion and deepening of vibration monitoring and diagnosis technology, signal analyzers have been developed in terms of simple operation, convenient carrying, and strong support for backup software. Noise monitoring and diagnosis is to determine the location and extent of machine equipment faults through noise measurement and analysis. Field practical methods include near-field measurement method, surface vibration velocity measurement method, spectrum analysis method, sound intensity method, etc., where spectrum analysis method is one. An important method for identifying sound sources is to use a noise measurement to drive the large gears, and the crankshaft begins to move from top to bottom.
When installing the die, press the adjustment button to momentarily press or release the friction clutch to stop the slider in any position. The continuous action is achieved by closing the travel switch on the cam. In order to make the machine work normally, the compressed air used should be waterless, the pressure is greater than 0.4MPa, and the normal starting pressure fluctuation is small. For this purpose, manual valves, water separators, gas storage cartridges and carburetor are installed in the gas path to ensure safe and reliable operation of the machine. The modified press has smooth operation and no noise, and the mold is easy to install and adjust. It solves the problems existing before the modification and has a good effect.
When the air is dry, the reproduction speed of influenza virus and Gram-positive bacteria that can cause infection is accelerated, and it is also easy to spread with the dust in the air and cause diseases. Dry air dehydrates human epidermal cells and reduces sebaceous gland secretion, resulting in rough, wrinkled and even cracked skin. Therefore, allergic diseases such as allergic dermatitis, skin itching and discomfort are also related to air dryness. Air drying also has an adverse impact on human immunity. At this time, it is necessary for us to buy an Aroma Diffuser humidifier to help us solve the problem of air drying !
We know that every autumn and winter is the high season of influenza. Apart from the large variation of temperature, the main reason is that the weather is dry. Because the study found that when the ambient humidity is lower than 20% RH, the dust in the air diffuses and the particulate matter inhaled by the human body increases, which is very easy to cause respiratory health problems.
To sum up, if the room is dry, the harm to human body is mainly manifested in three aspects:
If the humidity of the environment is low for a long time, the water in human skin is very easy to lose, which will cause dry skin and mucous membrane. The visual performance is: peeling and cracking, and severe cases may have chapping and pain
The so-called "fire" means that when the climate is dry or in a dry environment for a long time, people are also prone to "get angry" such as dry mouth, sore throat, oral ulcer, irritability and upset
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