How to properly use high viscosity pump

High Viscosity Pumps 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 conveying medium will flow smoothly. Many oils contain waxy components that can crystallize easily at low temperatures. The pour point for the delivery medium should be below the expected minimum operating temperature. In addition, the medium to be transported must be compatible with the rubber, such as seals, gaskets and hoses in the system. If the two are incompatible, the media must be re-defined. High-viscosity pumps that deliver high-viscosity fluids should deliver the most flow at lower power consumption, less leakage, and greater pressure. In determining the media to be transported, it should strictly follow the provisions of the product manual, try to use the manufacturer recommended fluid medium, and pay attention to consider the system operating temperature range. When you want to use in a wide range of temperature, the viscosity of the conveying medium should be higher. The transport medium is not only an intermediary for energy transfer but also a lubricant, seal and heat transfer medium. High viscosity liquid will increase the friction resistance, reduce output power, waste energy, and produce high system temperature. High viscosity pump "High viscosity pump outlet pipe should also be set safety valve and other protective devices, so once the pump outlet For the high-viscosity pump requiring positive and negative rotation, the safety valve must be installed on the inlet and outlet pipes of the high-viscosity pump. 1, High-viscosity pump installation and commissioning High-viscosity pump bearing or method Blue and its drive motor should be installed on a common basis, the foundation, flange or bearings are required to have sufficient rigidity to reduce high-viscosity pump operation, the vibration and noise generated by the motor and high-viscosity pump shall be flexible coupling Connection, the concentricity is less than 0.1 mm, the tilt angle of not more than 1 degree .Do not use the hammer to beat when installing the coupling, so as not to hurt the high viscosity pump gear and other parts.If the pulley, sprocket and other drive should be set bracket Support, to prevent the drive gear bearing by radial force .Tighten the high viscosity pump, the motor ground screw, the screw force should be uniform, reliable connection. Turn the coupling by hand, you should feel High viscosity pump can easily rotate, there is no clamping and other anomalies, and then can be pipe. High viscosity pump suction pipe diameter should be large enough and avoid narrow passage or sharp turn, reduce the elbow, remove unnecessary valves , Accessories, as far as possible to reduce the pump installation height, shorten the length of the suction pipe to reduce pressure loss. Tube fittings and other components of the seal should be good to prevent air intrusion, thereby controlling the occurrence of cavitation and cavitation. Before filling the high-viscosity pump housing with liquid to be transported for safe start-up, if the ambient temperature is below the freezing point, pre-heat the steam into the pump and then start the high-viscosity pump. High-viscosity pump rotation direction with the inlet and outlet consistent with high-viscosity pump if the first run, or long-term idle after use, preferably no-load or light load conditions for about an hour or so. During the run-in phase, abnormal temperature rise, leakage, vibration and noise should be detected in advance, and the machine should be shut down for inspection. Safety valves, etc. should also be set on the outlet pipe of the high-viscosity pump Set, so that once the pump outlet channel blockage, you can open the safety valve pressure relief for the need for positive and negative high-viscosity pump, the import and export pipelines are required to set the safety valve. 2, the selection of high viscosity pump working pressure The rated pressure of the pump refers to the maximum allowable pressure when the pump is continuously working, and its working pressure is determined by the external load, the life of the pump is directly related to its working pressure.For high-viscosity pumps that do not work frequently, the working pressure can be regarded as the pump Of the rated pressure, taking into account the different product quality, it is best to reduce the rated pressure of 20% to 30% for high-pressure pumps often work under high pressure, the working pressure should be lower than the rated pressure of the pump 1 to 2 Pressure level. Petrochemical 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 pump working pressure is adjusted too high, then Will make high-viscosity pump running under overload 3, high-viscosity pump noise problems In the fluid delivery system, the rapid changes in flow velocity, flow and pressure, gas Common cause of cracking and the alternating load is noise, high viscosity liquid transporting high viscosity pump is a major source of system-induced noise. Reasonable to determine the working speed of high-viscosity pump, 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. The use of appropriate vibration isolation technology can prevent the transmission of vibration to the adjacent structure. To this end, high-viscosity pump and drive motor should be connected through a flexible coupling, and installed on the same floor to ensure the coaxiality, the floor mounted on the elastic support, can further improve the vibration isolation effect. It is an effective way to control the noise of high-viscosity pump by providing an expansion cavity or accumulator on the outlet pipe of the high-viscosity pump to absorb the pressure pulsation in the pump or to abruptly change the pressure in the buffer pipe.