There is a circulation pump on the pressure vessel. How to consider the vibration problem?
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This post was last edited by Brother You Biao on 2020-5-13 09:38. First, we designed a molten salt tank. A circulation pump was set up on the upper part of the tank, and the working frequency of the pump motor was 42-47HZ. Through the finite element analysis of the entire equipment (with constraints), the maximum natural frequency of the first 10 orders is only 7HZ, the natural frequency of the 40th order is 42HZ, and the natural frequency of the 50th order reaches 45HZ, and the distribution is dense. Because the operating frequency overlaps with the natural frequency, can it be said that the circulation pump may cause vibration of the equipment during operation? However, if you look at the first 10 main natural frequencies of the equipment, they are all much smaller than the operating frequency. If the subsequent vibration energy is small, will it still have an impact on the equipment?
1. Is the motor a variable frequency motor? 2. Is there a soft connection between the pump and the container?
Motor operating frequency = motor + system natural frequency of the equipment? There is also a circulation pump above. Will the dry grinding of the vacuum impeller get stuck directly when starting up? During the process of getting stuck, the speed is low and the equipment can resonate.