High viscosity pump noise problem

High Viscosity Pumps In fluid delivery systems, rapid changes in liquid flow rate, flow and pressure, rupture of bubbles, and alternating loads are common causes of noise. Gear pumps that deliver high viscosity liquids are the main source of system noise. High-viscosity pump delivery media is not only an energy transfer intermediary, but also lubrication, sealing and heat transfer medium. The transmission of high-viscosity liquid gear pump should be done at lower power consumption, less leakage, greater pressure output The maximum flow rate. Liquid viscosity reflects the ease of flow of the medium, the viscosity is too high will increase the friction resistance, reduce output power, waste of energy and produce excessive system temperature in determining the media to be transported, it should be strictly Follow the instructions on the product manual, try to use the fluid media recommended by the manufacturer, and pay attention to consider the system operating temperature range. When you want to use a wide temperature range, the viscosity of the conveying medium should be higher. When the viscosity of the liquid being transported is high or when the system is operating in a cold environment it must be ensured that the transport medium will flow smoothly.Many fluids contain waxy ingredients, They are easy to crystallize at low temperatures, the pour point of the conveying medium should be lower than the expected minimum working temperature.In addition, the medium to be conveyed by the high viscosity pump must be compatible with the rubber materials in the system, such as seals, gaskets and hoses, If the two are incompatible, then you have to re-determine the transport medium.In general, open-mouth work of a high-viscosity gear pump, the maximum allowable noise should be less than 90 dB, otherwise the noise source should be active or passive containment, at the same time Reduce workers exposed to noise directly under the operating environment of time.If you can not control the noise, but also to take the hearing protection measures.If the high viscosity gear pump in the process of abnormal noise, it should immediately shut down to check.Reasonably determine the high viscosity gear pump Of the working speed, the gear and shaft rotation to avoid meshing resonance frequency, can prevent the noise aggravate, because when the meshing frequency close to the natural frequency of the gear train prone to resonance using appropriate vibration isolation technology can prevent the transmission of vibration to the adjacent Structure.To this end, the gear pump and drive motor should be connected through a flexible coupling, and installed on the same floor to ensure The bottom plate is installed on the elastic support to further improve the vibration isolation effect.An expanding cavity or accumulator is arranged on the outlet pipe of the gear pump to absorb the pressure pulsation of the pump or abruptly change the pressure in the buffer pipe, Is to control high-viscosity gear pump noise is an effective means of selection of high viscosity pump working pressure High viscosity pump rated pressure refers to the maximum allowable pressure pump continuous work, and its working pressure is determined by the external load, pump life Its work pressure is directly related to the work of the gear pump is not frequent, its working pressure can be taken as the rated pressure of the pump, taking into account the different product quality, it is best to reduce the rated pressure of 20% to 30% for frequent work at higher pressures Under the gear pump, the working pressure should be lower than the rated pressure of the pump 1 to 2 pressure levels.Petro-chemical equipment is often 24 hours continuous operation, when the pump working pressure should be made much lower than the rated pressure, and working speed Should also be lower than the rated speed.If the high viscosity gear pump working pressure is adjusted too high, it will make the gear pump in overload operation.