How to properly use high viscosity pump

How to Properly Use a High-Viscosity Pump to Deliver High-Viscosity Liquid Rotors Pumps 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. When transporting liquids with high viscosity or when the system is operating in a cold environment, it must be ensured that the transport 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. The transport medium is not only an intermediary for energy transfer but also a lubricant, seal and heat transfer medium. High viscous liquid will increase the friction resistance, reduce output power, waste energy, and produce high system temperature. High viscosity rotor pump "high viscosity pump outlet pipe should also be set safety valve and other protective devices, so once the pump The 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 .1, the working pressure of the selected pump rated pressure refers to the continuous pump work When the maximum allowable pressure, and its working pressure is determined by the external load, the pump life and its working pressure is directly related to not working frequently for the rotor 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 by 20% to 30%. For rotor pumps that work under high pressure, the working pressure should be 1 to 2 pressure levels lower than the rated pressure of the pump Petrochemical equipment is often continuous for 24 hours 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 If the pressure is adjusted too high, the rotor pump will run under overload 2. Installation and Commissioning The bearing or flange of the high-viscosity pump and its drive motor should adopt common installation foundation, flange, or support Must have sufficient rigidity to reduce the vibration and noise generated when the rotor pump is running.The motor and the rotor pump shall be connected by a flexible coupling with concentricity less than 0.1 mm and the inclination angle not more than 1 degree.When installing the coupling Do not use a hammer to beat, so as not to damage the rotor pump gear and other parts.If the pulley, sprocket and other drive support bracket should be set to prevent the drive gear bearing radial force.Tighten the rotor pump, the motor ground screw When the screw force should be uniform, reliable connection. Rotate the coupling by hand, you should feel the rotor pump can easily rotate, there is no clamping and other anomalies before they can pipe. High-viscosity pump suction pipe diameter should be Large enough to avoid narrow passages or sharp turns, reduce elbows, remove unnecessary valves, attachments, minimize pump installation height and shorten the length of suction pipe to reduce pressure Loss. Tube fittings and other components of the seal should be good to prevent air intrusion, and thus control the cavitation and cavitation occurred before the start of operation, to the rotor pump housing filled with liquid to be transported, to facilitate safe start. If the environment The temperature is below the freezing point, should be pre-heated steam into the pump, pre-heat treatment, and then start the rotor pump. Rotor pump rotation direction with the inlet and outlet. Rotor pump if the first run, or Long-term idle after use, preferably at no-load or light load for about an hour or so first run-in phase if abnormal temperature rise, leakage, vibration and noise should be shut down when checking the high viscosity of the pump The outlet pipe should also be provided with safety valve and other protective devices, so once the pump outlet channel blockage, you can open the relief valve relief valve.For the need for positive and negative high-viscosity pump, the import and export pipelines are required to set the safety valve. 3, the noise problem In the fluid delivery system, the rapid changes in liquid flow velocity, flow and pressure, the bubble rupture and alternating load are common causes of noise transmission Viscosity of the liquid pump rotor is the main source of system-induced noise. Reasonable determination of the rotor pump speed, 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, the rotor pump and the drive motor should be connected by a flexible coupling and mounted on the same base plate to ensure coaxiality. The base plate is mounted on the elastic support to further improve the vibration isolation effect. It is an effective way to control the noise of high-viscosity pump by setting an expansion cavity or accumulator on the outlet pipe of the rotor pump to absorb the pressure pulsation in the pump or sudden pressure change in the buffer pipe. Advantages (1) delivery of liquid smooth, no pulsation, vibration, low noise. (2) has a strong self-priming performance. (3) The correct selection of parts materials, can transport a variety of corrosive media, the use of temperature can be 200 ℃. (4) the same internal and external rotor rotation, wear small, long service life. (5) pump speed and flow rate as a linear function, may be appropriate to change the speed to change the pump flow. (6) Especially suitable for the delivery of high viscosity pump consistency media.