使用说明书 OPERATION INSTRUCTION版本：AVersion:AGN.N.NB型凝结水泵TYPE GN.N.NB COAGULATING PUMP浙江水泵总厂有限公司ZHEJIANG PUMP GENERAL WORKS CO，LTDTYPE GN.N.NB COAGULATING PUMPⅠ、GENERAL DESCRIPTION1、Application and characteristicsType GN、N and NB coagulating pumps have a characteristic of which NPSH’s performance are finer than those of ordinary pumps. It is a suitable corollary equipment for the steam turbogenerators to pump over the condensed water out of the condenser in metallurgical plants, power plants, refineries, chemical and petrochemical plants, low-temperature projects and pump over the liquid from the high-vacuum containers. It is mainly used for the occasions where the cavitation demands high in the process flow in power plants, metallurgical plants, refineries, petrochemical plants, low-temperature projects, pipelines and offshore industries and it can be used in else place where the agent is similar to the condensate water.2、Operation range℃℃The temperature of delivered liquid is below 80(The temperature can be below 150 if a cooling device is fixed in cooling chamber). The head is from 22 meters to 320 meters. The capacity is from 2m3/h to 250 m3/h.3、Type instructionsFor example：GN3/12、3N6×2 and 4N6AMean:3------Suction pipe diameter（inch）N------Condensate pump GN------High suction head condensate pump12------Capacity at design point(m3/h）6------Single-stage head devided by 10 at design point ×2------Stage numbers A------Impeller has been cut first timeFor example：100NB-45 、GN85-80×3Mean:100------Suction diameter（millimeter） GN------High suction condensate pump NB------Condensate pump 85------Head at design point45------Head at design point 80------Single-stage head at design pointⅡ、MECHANISM INSTRUCTION1、Type3N6、4N6、6N6、NB series condensate pumps are single-stage overhung centrifugal pump （construction shown in drawing 1）. The suction of the pumps is horizontally and the discharge is vertically upward. The main parts of the pump include pump casing、impeller、pump cover、pump shaft and hang frame. Tow DAN LIE radial ball bearing are assembled in the hang frame to support the pump rotating components and bear the axial force and the radial force of the pump. Lubricating oil lubricates the bearing. Packing to prevent air coming or water leakage seals the shaft seal of the pump. The renewable shaft sleeve is assembled on the shaft seal of the pump to protect the pump shaft, and the O-ring is assembled between the shaft sleeve and the pump shaft to prevent air coming or water leakage in the clearance. The motor directly through the flexible coupling started the pump. The pump rotates in counter clockwise direction, as viewed from the motor side. (Type 200NB-80 rotates in clockwise)2、Type GN、3N6×2、4N5×2、4N6×2 condensate pumps are single-suctionmulti-stages overhung centrifugal pump ( drawing 2、drawing 3). The suction of the pumps is horizontally and the discharge is vertically upward. The main parts of the type GN pump include pump cover、impeller、diffuser、stage casing、pump casing、pump shaft and hang frame. The main parts of the type 3N6×2、4N5×2、4N6×2 pump include pump cover、impeller、diffuser、pump casing、pump shaft and hang frame. The pump rotor was formed with impeller and impeller spacer sleeve assembled on the shaft. Tow DAN LIE radial ball bearing are assembled in the hang frame to support the pump rotating components and bear the axial force and the radial force of the pump. Lubricating oil lubricates the bearing. Packing to prevent air coming or water leakage seals the shaft seal of the pump. The renewable shaft sleeve is assembled on the shaft seal of the pump to protect the pump shaft, and the O-ring is assembled between the shaft sleeve and the pump shaft to prevent air coming or water leakage in the clearance.The motor drives the pump directly through the flexible coupling, The pump rotates in counter clockwise direction, as viewed from the motor side. (The GN80-22 and GN150-90 rotates in clockwise).The material of the main part of the pump：pump casing、pump cover、intake section、middle section、and discharge section: cast iron and cast steel.Inducer、impeller、guide vane、sealing ring and shaft sleeve: cast iron, cast steed, stainless steel and copper alloy.pump shaft: fine carbon steelNote：The factory can supply other materials according to the request of the user.Ⅲ、ASSEMBLE AND DISASSEMBLEType GN、N and NB pump are assembled and disassembled according to the following regulations:1、Supporting Parts℃Fit the bearing which is beaten to about 100 by the oil on the pump shaft , then fit them in hang frame body. The axial location is exactly with ahead roller bearing, the axial position-moving for the shaft is from 0.1mm to 0.15mm.2、Working Partsa.Fit the pump casing and pump cover in hang frame, check that the end surface pulsation don’t exceed 0.15mm. The paper gasket is well set on the sealing surface.b.Assemble impeller: Assemble the shaft sleeve carefully not to injure 0-ring, fix the impeller on the shaft tightly with the impeller nut and check the ring pulsation not exceeds 0.08mm. The impeller rotates in clockwise direction as viewed from the suction direction. (The GN80-22、GN150-90、200NB-80 rotate in counter clockwise).3、Assemble the packingCut the oil-impregnated graphite asbestos rope according to required length of shaft diameter. The inclination of cutting port is about 45°in order to make the joint straight and closely when the rope is enclosed become ring. The joint miss about 120°angle each other when the packing is fitted in the packing box. The packing gland should be pressed tightly. It is suitable that the leakage is about 20~30 drips per minute when the pump is operating.The pump’s disassemble should use the installation of pump itself, every fitting surface should be protected strictly in order to prevent damage.Ⅳ、OUTLINE DIMENSIONS AND INSTALLATION1．Installation outline drawing2．InstallationA．Preparation before installation：(1) Check the pump and the motor so that they aren’t is damaged and there aren’t objects in the pump.(2) Prepare tools and the hoisting machine.(3) Check the base of the pump according to the drawing.B．Procedure of installation(1) Clean the oily and dirty from the pedestal, place the pedestal on the foundation screw that have been embedded before, there are a pair of wedges under the pedestal.(2) Use level gauge to check the level degree of the pump’s pedestal.(3) Fill up the hole eye of the foundation screw and the internal cavity of the pump pedestal with the cement grout.(4) After the cement grout has been hardened completely, tighten the nut of the foundation screw.(5) Cleanse the supporting plane of the pedestal carefully, recheck the level of the pedestal and cleanse the foundation plane of the pump and the motor, then put the pump and the motor on the pedestal.(6) Check the level degree of the pump shaft and the motor shaft according to the following drawing.(7) Check the same center degree between the pump shaft and the motor shaft after the suction piping has been joined to the discharge piping.(8) Join the suction pipe to the top of the condensate with the air-drain pipe.(9) The water-sealing water can be filled in from the by-pass installed behind the check valve door of discharge piping.C ．The vacuum equilibrium pipelineD ．pump.(2) Suction piping should be sealed completely, the shape of the suction piping should prevent forming air pocket when the water-pressure test is carrying on at the pressure of 0.2Mpa.(3) The water-flow speed in suction piping should equal to 2m/s or less than 2m/s. The suction piping don’t be too long, but should avoid marking a turn rapidly. The flow control valve is not allowed to be installed on the suction pipeline, only a vacuum pump is allowed with it in full open state.E. The high calculation of installation of pump:The condensation pump is generally used to aspirate the condensation water usefulness in the closed container, and should be designed for the flowing backward device. It pours Into highly to calculate. Otherwise possibly causing pump vapor to lose owing to pours into inadequately, and influencing the normal work of pump, the damage pump causes the accident when serious.It pours into the calculation formula for:[]c c v c k h g p g p NPSH hg +++−≥ρρIn the type:[NPSH] – Net positive suction head parameter of pump (m)h c --- Absorbing into the waterpower of pipe route loses (m)k c --- The safe parameter of net positive suction head of pump, and usually take 0.3 - 0.5m--- Absolute pressure flood peak (m) of liquid face in the container ρg p c--- Lashes the vaporization sent under liquid temperature pressure flood peak (m) ρg pvⅤ、START AND STOP1、Preparation before start(1) The No. 20～30 machine oil was filled into hang frame body from the oil hole on top of the hang frame until the oil surface gets to the middle part of the oil meter.(2) The pump won’t operate under the condition that there is no water in the pump, fill the pump with water fully before starting pump, water-sealing must be given and the pressure of water-sealing water should be greater than the pressure of the suction about 0.15Mpa. When the condensate pump is used as a stand-by pump, the valves on degassing pipe and air discharging pipe should be maintained open so as to let the air in pump chamber release, then connect the outside sealed water or wash the pipe by the machine in sealing condition and then fill the pump chamber with water for emergency starting.(3) Determine the rotate direction of the motor. The pump rotates in counter clockwise as viewed from the motor side. (Type GN80-22、GN150-90、200NB-80 rotate in clockwise ). After joining the motor to the pump finish, check the pump if it is turned lighthearted and uniform.(4) The gate valve of discharge piping should be turned off after the pump is started.2、Start(1) When the pump operated under normal revolutions, open the discharge piping gate valve a little, and check the working situation of all gauge and packing. The working time for the pump doesn’t allow too long under the condition that the discharge gate valves was closed down.(2) Check the temperature of the bearing and the packing, if the temperature of them is too heat, stop the pump immediately, the water will be leakage from the packing regularly.(3) If the pump operated very normally and the discharge gate valve has been opened until the required working condition is produced, the pump’s start will be finished.3、Stop(1) Gradually close down the gate valve on the discharge piping, then cut off the circuit of the motor.(2) The pump, which is used to reserve operation as stopping, must be putted on the watersealing.(3) If the pump will not be used for along period of time, it should be disassembled, smeared over oil and packed then properly preserve the pump.Ⅵ、OPERATION AND MAINTENANCE1、As the pump is being operated, take care to observe the pressure gauge, vacuum gauge, the temperature of the bearing, the situation of water for the packing, oil position of the bearing and that the vibration and abnormal sound.2、The maximum temperature of the bearing should be not higher than 75, and the risen℃℃temperature of the bearing don’t exceed 50.3、Change the lubricating oil after the pump has been operated for 100 hours within first working month, Later replace new oil after the pump has been operated for 2400 hours every time.4、If any abnormal things (such as strenuous vibration and noise) occur when the pump is under operation, immediately find reasons and eliminate them, then take notes the result of observing and handling.5、The trouble happened possibly and the solving methods：No. Trouble Reasons Solving Methods1 The pumpcan’tdeliverwater1. The rotating direction for thepump is not right.2. The pouring pressure is notenough, the suction pipe or metervalve is leakage of air.3. There is some air pocket in thepump chamber.1.The pump shaft rotates in counterclockwise direction as viewed fromthe motor side, if the direction isn’tright, exchange the joint of wire.2. Adjust the discharge gate valve toreduce the capacity or increase thepouring pressure, tighten up orchoking up the steam-leakageplace.3. Open the pipe plug on top of thepump casing to drain steam.2Thecapacity orhead isreducedwhen thepump isoperating1. The temperature of the suction istoo high.2. The abrasion interval of thesealing ring is too big.3.The working impeller is damagedor stopped up.4.The measuring meter isn’tcorrect.5.There are some air pocket inpump chamber.1.The pump is only used that thetemperature is below 80.℃2.Replace the sealing ring againnecessary.3.Clean the interior of the workingimpeller.4.Check the meter.5.Open the screwed plug on top of thepump casing to drain air.3 The motoris overload1.The pump capacity exceedsstipulate capacity.2.The packing is too tighter.3.The interior of the pump wasentangled by cotton yarn.1.Check the flow gauge and adjustthe capacity with gate valve.2.Injust the packing gland.3.Disassemble the pump and cleanthe internal impurity.4Thebearing istoo heat1. The ring bush was abrasionbecause the pump shaft has beenbend.2.The lubricating oil of the bearingis not enough.3.The center between the pumpshaft and the motor shaft isn’tright.4.The balance water return pipeflows not well or the rear rearsealing ring gap too large andaxial force too high.1. Check the ring bush and thestraightness of the shaft.2. Pour in oil.3. Check the coupling to aim atcenter.4.Keep the balance water return pipewell flow adjust the gap and setaxial force balance.5The pumpoccurvibration1.The center between the pumpshaft and the motor shaft isn’tright.2.The rotor isn’t balance.3.The foundation bolt and the studbolt on the pump frame are notright.4.Covitation occurs on pump.1.Check the coupling to aim at center.2.Check the rotor.3.Fix all bolts tightly4.Try to find the cause and handle it. 6、If any special things don’t occur, the overhaul of the pump will be carried on together withthe general overhaul of the machirevy.。
