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 in 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 in a wide temperature range, the viscosity of the conveying medium should be higher.
High Viscosity Pumps When the viscosity of the fluid being delivered is high or when the system is operating in a cold environment it must be ensured that the fluid can flow smoothly.Many fluids contain waxy components which are easily crystallized at low temperatures and The point should be lower than the expected minimum operating temperature.In addition, high viscosity pump to be transported media must be compatible with the system of seals, gaskets, hoses and other rubber materials, if the two are incompatible, then you have to re-determine Transport medium.
Generally speaking, the maximum allowable noise of a high-viscosity gear pump working in open air should be less than 90 dB, otherwise, the noise source should be actively or passively restrained while reducing the workers' direct exposure to working hours under noisy conditions. Control of noise, but also to take the hearing protection measures.High viscosity gear pump in the course of the operation of abnormal noise, it should immediately stop checking.
Reasonable determination of high viscosity gear pump operating speed, the gear and shaft rotation to avoid meshing resonance frequency, to prevent increased noise because when the meshing frequency close to the natural frequency of the gear train prone to resonance using the appropriate vibration isolation technology To prevent the transmission of vibration to the adjacent structure.To this end, the gear pump and the drive motor should be connected through a flexible coupling, and mounted on the same floor to ensure the coaxiality, the floor mounted on the elastic support, can be further enhanced Vibration Isolation Effect: Setting an expansion cavity or accumulator on the outlet pipe of the gear pump to absorb the pressure pulsation in the pump or sudden pressure change in the buffer pipe is an effective way to control the noise of the high-viscosity gear pump.
The selection of high-viscosity pump working pressure High-viscosity pump rated pressure refers to the continuous working pressure of the pump, and its working pressure is determined by the external load, the pump life and its working pressure is directly related to infrequent work Gear pump, the 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 often work under high pressure gear pump, the working pressure should be higher than the pump Of the rated pressure low 1 to 2 pressure level.Petro chemical equipment is often 24 hours continuous operation, then the pump working pressure should be made much lower than the rated pressure, and the working speed should be lower than the rated speed.If the high viscosity gear Adjusting the working pressure of the pump too high will cause the gear pump to operate under overload.
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