Multistage pump automation development

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multistage pump automation development is a kind of centrifugal pump, multi-stage pump is also rely on the rotation of the impeller in the centrifugal force, and material. For gas density to achieve mechanical vacuum water pump was out working range, and thus gradually obtain high vacuum. The multistage pump can change the volume of the basic construction of centrifugal pump is composed of six parts, respectively, impeller, pump body, pump shaft, bearing, seal ring, refers to only one single stage pump impeller pump, top lift is only 125 meters of multistage water pump refers to two or more than two impeller pump. The basic construction of multistage pump is composed of six parts, respectively, impeller, pump body, pump shaft, bearing, seal ring, stuffing box. 1, the impeller is the core part of the multistage pump, multi-stage pump speed strength, higher impeller blade and play a major role, the impeller through static balancing experiments before assembly. Impeller on the inside and outside for smooth surface to reduce friction loss of water. 2, the pump body also calls the pump shell, it is the body of the multistage pump. Support fixed effect, and connected to install bearing bracket. 3, the function of multistage pump pump shaft is connected by coupling and motor, the torque of the motor to the impeller, so the multistage pump is a major part of the mechanical energy transfer. 4, multistage pump bearing is set on the pump shaft support components of pump shaft, which has two kinds of rolling bearing and sliding bearing. Rolling bearing use butter as a lubricant oil is generally appropriate for two-thirds to three-quarters of the volume too much will be fever, too little and there was a noise and fever! Sliding bearing is using a transparent oil as lubricant, go to the oil level line. Too much oil leak to the pump shaft and floating base, too little bearing overheating and burn out cause an accident! Bearing has the highest temperature in the process of multistage pump running at about 85 degrees generally run at 60 degrees, if high will find reason ( If there are impurities, oil is black, whether water) And processed in a timely manner! 5, sealing ring, also known as minus leakage ring. Import and pump impeller shell gap between in the cause of high water in the pump by means of this clearance flow to the low pressure area, affect the water yield of pump, efficiency! Clearance starts to cause the impeller and pump casing friction wear. In order to increase the flow resistance reducing internal leakage and delay the service life of the impeller and the pump shell, the multistage pump pump casing and impeller around the foreign aid junction with sealing ring, sealing gap in a 0. 25 ~ 1. It is advisable to 10 mm. 6, stuffing box is mainly composed of filler, seal ring, packing, packing gland, water tubes. The role of the stuffing box is closed multistage pump pump shell and pump shaft, the gap between multistage pump multistage pump not let the flow within the pump does not flow outside to not let outside air into the multistage pump inside the pump. Always stay within the multistage pump vacuum! When multistage pump and pump shaft packing friction heat generation relies on water seal to hold water in the water seal ring packing cooling! Keep the pump running. So in the process of multistage pump run Tours of inspection to check the stuffing box is paying special attention to! Running about 600 hours will be carried out on the packing replacement. Multistage water pump seal performance check multistage pump is mainly used for conveying water and physical and chemical properties similar to water in the liquid. The biggest advantages of multistage pump hydraulic model of advanced design, high efficiency, high energy saving. Multistage pump internal impeller, pump shell and its main parts adopt stainless steel stamping, special smooth flow channel, bearings, bushings with hard alloy, multistage pump with super service life, avoid to produce secondary pollution. Does not exceed 80 ℃, the highest temperature liquid multistage pump is widely used in mine drainage, factories and urban water supply. In order to guarantee the multistage pump mechanical seal after assembly without leakage, multistage pump tightness check is necessary, but the inspection process is more complex, more detailed operation method of multistage pump are given here by: 1, measure the length of the static ring anti-rotating pin and pin hole depth, prevent the pin is too long the static ring cannot be assembled in place. The problem will damage the mechanical seal. 2, check the ring and static ring and the clearance between the shaft or the shaft sleeve, the inner diameter of the static ring 1-2 mm, usually larger than the diameter of axle for ring, in order to ensure floating, inner diameter larger than the diameter of axle 0. 5-1 mm to compensate for shaft vibration and deflection, but the gap not too big, otherwise it will make the ring seal card into and cause the destruction of the mechanical seal function. Hongli multistage pump pump factory machining equipment multistage pump equipment 3, measuring the size of the ring and static ring sealing surface. This data is used to verify the radial width of dynamic and static ring, elected in different friction material, hard material friction surface radial width should be bigger than soft 1-3 mm, otherwise easy to face the hard stuff into soft material of end face edges and corners. 4, measure the length of the compensation spring is changing. Spring change will directly affect the performance of mechanical seal face pressure. Usually spring in the long run length is shorten, the compensation spring on the ring of the mechanical seal will also, because of the centrifugal force and deformation. 5, check of multistage pump mechanical seal force. We usually speak is mechanical seal force of end face specific pressure, face pressure to appropriate, too, will make the mechanical seal friction surface heating, accelerate the end wear, increase the friction power; Is too small, easy to leak. End face specific pressure is set at the mechanical seal design, when we are in the assembly can only be defined by measuring mechanical seal force. Usually measurement method makes measurement installed static ring end face to the end of the capping vertical distance, when measuring ring end face to the end of the capping vertical distance, difference of the two is extremely tight force of mechanical seal.

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