Effective measures to control the noise of high viscosity gear pumps
Reasonably determine the working speed of the high-viscosity gear pump, so that the rotation of the gear and the shaft avoids the meshing resonance frequency, which can prevent the noise from increasing.
In the high viscosity gear pump conveying fluid system, the rapid change of liquid flow velocity, flow rate and pressure, the bubble burst and the alternating load are common causes of noise. The viscosity of the transport liquid is induced by the high viscosity gear pump system noise. The main source.
Reasonably determine the working speed of the high-viscosity gear pump, so that the rotation of the gear and the shaft avoids the meshing resonance frequency, which can prevent the noise from increasing. This is because resonance occurs easily when the meshing frequency is close to the natural frequency of the gear pump. The use of appropriate anti-vibration technology prevents vibration from being transmitted to adjacent structures. For this reason, the high-viscosity gear pump and the drive motor should be connected by a flexible coupling and installed on the same bottom plate to ensure the concentricity of the pump and the motor. The bottom plate is mounted on the elastic support to further improve the vibration isolation effect. It is an effective means to control the noise of the high viscosity gear pump by providing an expansion chamber or accumulator on the outlet pipe of the gear pump to absorb the pressure pulsation of the pump or the sudden change of pressure in the buffer line.
In general, the maximum allowable noise of high-viscosity gear pumps should be less than 90 decibels, otherwise the source of noise should be actively or passively contained, while reducing the time required for workers to be exposed directly to noisy environments. If you are unable to control the noise, you should also take hearing protection measures. Once the high-viscosity gear pump has abnormal noise during operation, it should be stopped immediately.
