The unfavorable factors that cause the pump to vibrate

H-150E pump with 11kW motor can also be started smoothly at room temperature 5°C. 3 Vibrating H-150 pump is designed according to the principle of dynamic balance. It should not have large vibration, but in fact it has obvious vibration, and there are large, small, and inconsistent. Inquired about a H-150 pump in 1980. In the static balance record, it was found that the balance weight of the pulley and balance wheel was less than 2kg, and the weight of the second round was also inconsistent. Therefore, we reviewed the past balance calculations and found that there is a certain deviation; the anatomy of the eccentric wheel, but also found that the internal structure size error is larger; In addition, the weight of the pulley and the balance wheel is processed on only one side, so the weight of the weight There is no guarantee at all; the squareness of the centerline of the keyway and the chord surface (non-machined surface) of the balance block during machining is also difficult to guarantee. In short, all this is a negative factor that causes the pump to vibrate.

This time in the design of the H-150E pump, we first performed an accurate calculation of the balance in view of the above-mentioned situation, and designed to minimize the unbalanced weight. All the processing methods of the counterweights are used to ensure the quality of the counterweights. They are tightly controlled during the processing and processing. All this ensures that the pump's equilibrium conditions are satisfied. Facts have proved that the new H-150E pump does not have to do any static balancing at all. Its vibration performance is not inferior to that of foreign pumps. There is no foot screw, and it is still as stable as the mountain in operation. After testing, its vibration data is as follows. Direction Amplitude Peak value (mm) Horizontal direction (front and rear) 0.068 Horizontal direction (Left and right) 0.020 Vertical direction 0.0284 Noise The test conditions in the noise power level measurement specified in JB/T1246-1997 "Spool Vacuum Pump" should be strictly followed. The conditions specified in the test conditions are: the tested pump is not connected to the test cover, the air inlet is closed, the pump is operated for at least 30 minutes, and the noise measurement can only be performed when the pump temperature is balanced and reaches the limit pressure. The most critical point here is the phrase “When the ultimate pressure is reached”. According to our test, the maximum value of the slide valve pump is only 30 minutes at the factory, and it takes 2 to 4 hours to reach the limit pressure. As far as we know, there are few manufacturers. Measured noise according to the above regulations.

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