Regardless of the type of vacuum pump , vibration and noise affect industrial vacuum system applications and even cause environmental noise pollution. Therefore, in the vacuum pump industry, reducing pump vibration and noise is very important for the practical use of the vacuum pump and its life.
In order to analyze the specific things more vividly, we still use the sliding valve vacuum pump as an example. Since the introduction of the sliding valve pump, the vibration generated by the inertial force of the rotor has attracted people's attention and has done a lot of work. But this problem has not been completely solved so far. The current general consensus is that the inertial force generated by the rotor of the spool valve is the main cause of pump vibration.
If the working point of the pump seriously deviates from the efficiency point operation : uneven flow and unstable reflux occur in the blade ; local pressure drop causes cavitation, etc. Vibration caused by mechanical reasons : such as imbalance of the rotor assembly : pump, motor, Coupling misalignment ; Shaft bending : Gear tooth surface wear : Sliding bearing oil film oscillation : rolling bearing track, steel ball is not round or inner and outer rings fall off : unreasonable design or thermal expansion causes excessive pipeline resonance ; loosening of anchor bolts.
The main findings from the vibration of the vacuum pump from the moment the unbalanced inertial force generated by the motion system. At present, the methods for solving the unbalanced inertial force have the following aspects :
First, the use of dynamic balance. Usually can be calculated by analysis, then add balance wheel and outside the pulley
Add a weight or balance wheel to balance the inertia force of the eccentric and the spool. Practice has proved that this is an effective method of damping.
Second, it is also possible to install and install mechanical vibration damping devices. Of course, such devices are mostly used in high-speed pumps and pumps with large pumping speeds, for example, by using a pump base to install anti-vibration glue.
Third, the pump structure is adjusted, and the actual type can be used to design the type, bedroom and other types of pumps. In the actual application, because the horizontal structure has the characteristics of compactness and low center of gravity, the vibration noise is reduced.
A variety of cylinder combination structures are used. Of course, the number of cylinders should be reasonable, and the layout should be comprehensively considered for practical use. Dongguan Punoke Vacuum Technology Co., Ltd. is a professional service vacuum pump service provider, providing a complete set of vacuum pump parts consumables; our company has accumulated more than 10 years of experience in the field of imported vacuum pump repair , mature technology, cost-effective maintenance.
Corn has a more complete nutritional profile, making it ideal as a preferred food for scientific fat loss.
Generally speaking, sweet corn favors vegetables and sticky corn favors staple foods.
This classification is for the sweet corn (vegetable).
There are generally two ways to lose fat scientifically: exercise and controlled diet. Both are indispensable and must be combined for effective fat loss. Especially for people who are not particularly obese, we should consider the combination of exercise and diet control. In terms of diet control, take care that the daily intake of food is based on high quality protein and vegetables.
1. The time and intensity of exercise should be gradual. Exercise more than 1 hour a day is good.
2. exercise to control their mouths, eat less sugary food. If you are more gluttonous, you can use fruit sweet corn to satisfy your cravings. Fruit sweet corn is sweeter to eat, but it is low in sugar and satiety, which can help you control your diet.
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