Fluorine plastic chemical centrifugal pump structure, fluorine plastic centrifugal pump working principle and characteristics

Fluorine plastic centrifugal pump is rely on the rotation of the impeller on the liquid force the prime mover's mechanical energy transmitted to the liquid. Due to the effect of fluorine plastic chemical centrifugal pump in the process of the liquid flowing from impeller import export, its speed can be increased, and pressure can be impeller discharge of liquid through the pressure out of the room, most of the speed can be converted to pressure, and then out along the discharge pipe, the impeller inlet vacuum or low pressure, formed by the liquid discharge and suction tank of liquid in the liquid surface pressure ( Atmospheric pressure) By the impeller under the action of the import, so the rotating impeller is continuous inhalation and discharged liquid. start before the pump first inflow tube filling with water, the water pump after the operation, the high-speed rotating impeller and the centrifugal force, under the action of the water in the impeller passage was thrown around, pressed into the volute, impeller entrance to form a vacuum, pools of water along the suction pipe in the outside world under the atmospheric pressure inhaled added to this space. Then inhale water was thrown the volute impeller into the outlet pipe. If so, fluorine plastic centrifugal pump impeller rotating unceasingly, can continuous water absorption, water pressure, water can be continuously from lower uplift to high or far away. To sum up, fluorine plastic centrifugal pump is due to the centrifugal force generated by high speed rotation of the impeller, under the action of the water phase high, therefore calls fluorine plastic centrifugal pump. ( 1) Impeller is pump drive shaft rotation, work on the blade between the fluid and fluid the effect of the centrifugal force, thrown by the impeller center to the periphery. When the fluid reaches the impeller peripheral velocity is very high. ( 2) Collected from each blade pump shell thrown between liquid, the liquid in the shell channel along the spiral shape gradually expand the direction, can make the fluid kinetic energy is converted to static pressure, reduce the energy loss. So the action of the pump housing is not only collected liquid, it is an energy conversion device. ( 3) Liquid suction on the principle that rely on high-speed rotating impeller, forcing the center of the impeller liquid be discarded at a high speed, so as to form a low pressure in the center of the impeller, the low trough in the liquid, have been continuously on the absorption. Gas bound phenomenon: if a centrifugal pump shell filled with gas, before initiating the impeller center since the start when the gas is not there enough vacuum formation, so that liquid in the tank can't be sucked. This phenomenon is called chi bound. In order to prevent gas bound, the phenomena of centrifugal pump will start to use the foreign liquid pump shell space filling. This step is called irrigation pump operation. To prevent injection pump shell liquid by gravity into the low slot, at the entrance of the pump suction line is equipped with check valve, Bottom valve) ; If the position of the pump is lower than the slot liquid surface, the startup without irrigation pump. ( 4) Liquid in the pump impeller peripheral install idler pulley, high energy conversion efficiency. Roller is fixed with a leaf in impeller peripheral ring. The bending direction of the blade and impeller blade bending in the opposite direction, the bending Angle is corresponding to the direction of liquid flow from the impeller, guide the liquid in the pump shell channel smoothly change direction, minimize the energy losses, dynamic pressure can be converted to static pressure of high efficiency. ( 5) HouGaiBan eliminate axial thrust balance hole. Leave the impeller peripheral liquid pressure is high, has a part to the impeller HouGaiBan behind, can enter and impeller liquid for low pressure at the entrance of the side, creating a push pump impeller inlet side of the axial thrust. It is easy to cause the impeller and pump casing wear contacts, serious when still can produce vibration. Balance hole part of high pressure liquid leak to the low pressure area, reduce the pressure difference before and after impeller. But it will be the lower pump efficiency. ( 6) Shaft sealing device, normal and efficient operation of centrifugal water pump. Centrifugal pump is the pump shaft rotation and shell at work, during which the ring gap if not under seal or the seal is not good, the surrounding air will penetrate into the center of the impeller low pressure area, decrease the flow rate, efficiency of pump. Serious when flow is zero - — Air bound. Usually, mechanical seals or packing seal can be used to seal between shaft and shell. The characteristics of fluorine plastic centrifugal pump ( 1) Water along the fluorine plastic chemical pump flow direction is along the axial suction impeller, perpendicular to the axial flow, namely the in and out of each other becomes 90 ° in the direction of flow. ( 2) Because of fluorine plastic rely on imported form vacuum suction impeller centrifugal pump, so have to phase in the pump before starting and suction tube perfusion diversion, or use the vacuum pump suction, to form a vacuum exhaust air, and the pump shell and the suction pipe must be strictly seal, shall not leak, otherwise not form a vacuum, also can't absorb water. ( 3) Can't be formed due to impeller import vacuum, so the fluorine plastic centrifugal pump suction height should not exceed 10 m, coupled with the flow of the suction piping to bring down the loss, actually allow installation height ( The height of the water pump axis from the suction surface) Is far less than 10 meters. Such as the installation is too high, not bibulous, In addition, because the mountain plains than the atmospheric pressure is low, so the same pumps in a mountainous area, especially in the high mountains when installation, the installation height should be lower, also won't be able to absorb water.
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