The pump body rotates normally at low speeds, but there is a vibration issue at high speeds
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It is a positive displacement pump; the motor has a power of around 90 KW. The reducer is connected to the motor in a rigid manner, while it is connected to the pump body via a universal coupling. The reduction ratio is 37.25. The motor operates normally at frequencies below 50 Hz, with no abnormal noises; however, vibration becomes extremely high when the frequency ranges between 50 and 70 Hz. The motor, reducer, and pump base are all rigid foundations.
Generate a spectrum graph to take a look
That technology is a bit expensive. . . . ;P
It’s better to be more detailed about the issue, including whether it falls within the scope of the process. It is recommended to check whether the various process conditions listed in the manual meet the requirements for use. For reference.
Right, if there were a portable vibration analyzer like the VB8, it would be possible to build one oneself as well. But such equipment is also quite expensive
1. Motor selection: The normal frequency range for variable frequency drives is 5–50 Hz, but the frequency range for this motor is 5–70 Hz. From what I’ve found, in China the standard frequencies are 50 and 60 Hz; a frequency of 70 Hz is quite rare. 2. Normally, pumps with high flow rates operate at low speeds, as their efficiency may not be very good. In order to increase the speed and thus the flow rate, vibrations occur.
It must have exceeded its power rating
The motor and gearbox are connected rigidly, which is a problem; it should be changed to an elastic coupling. Can the motor operate at 70Hz? Ordinary motors are designed for 50Hz; if they operate at excessive speeds, there will be problems with the dynamic balance of the bearings and rotor. Also, when the motor is rigidly connected to the reducer, its natural frequency may fall between 50-70 Hz, leading to resonance. Why are universal joints used in reducers and pumps? Will the pump move? This is not caused by vibration. It can be solved.