Unable to start First, check the power supply status: whether the connector connection is firm; whether the switch contact is tight; whether the fuse is blown; whether the three-phase power supply is equal or not. If there is a broken circuit, bad contact, blown fuse, or lack of phase, the cause should be identified and repaired in a timely manner. Secondly, check whether the pump itself is mechanically faulty. The common causes are: too tight packing or jamming between the impeller and the pump body caused by debris; the pump shaft, bearing, and the leakage reduction ring are rusted; the pump shaft is seriously bent. Remedy: Relax the packing and unclog the sink; disassemble the pump body to remove impurities and remove rust; remove the shaft calibration or replace the new pump shaft. Custom Gear Reducer,Gear Box,Aluminum Die Gear Box,Auto Gear Box Wuxi Sixleaf Machinery Co. LTD , https://www.wuxisixleafmachine.com
Cause of water pump heating: bearing damage; clearance of rolling bearing or bracket cover is too small; axis of the pump shaft is bent or misaligned on both axes; tape is too tight; oil or oil is not good; the balance hole on the impeller is blocked, the impeller loses balance, and increases. The thrust to the side. Remedy: replace the bearing; remove the back cover, install the gasket between the bracket and the bearing seat; investigate the pump shaft or adjust the concentricity of the two shafts; properly loosen the tightness of the tape; add clean butter, butter to occupy the bearing About 60% of the internal void; clear the blockage in the balance hole.
Insufficient water flow in the pump because: The power speed is not matched or the belt slips, making the speed low; the installation angle of the axial pump blade is too small; the head is insufficient, the pipeline is too long, or the pipeline has a right angle bend; the suction process is high; the bottom valve , pipe and impeller partially blocked or impeller defect; outlet pipe leakage serious. Remedy: Restore the rated speed, remove the belt grease, adjust the tightness of the belt; adjust the blade angle, reduce the installation position of the pump, shorten the pipeline or change the bending of the pipeline; seal the leakage of the pump, press the packing; clear the plug Things, replace the impeller; replace the leakage reduction ring and block the leak.
The reason why the pump cannot suck water is because there is air in the pump body or the product gas in the inlet pipe, or the bottom valve is closed and the water is not filled properly, the vacuum pump packing is seriously leaking, and the gate valve or the flap door is not closed. Remedy: Press water first, fill the pump with water, and turn it on. At the same time, check whether the check valve is tight and whether there is any air leakage in the pipes and fittings. If air leakage is found, apply lubricant or paint to the joint after disassembly, and tighten the screws. Check the oil seal ring of the pump shaft. If it is worn out, replace it with a new one. The pipe leaks or leaks. The nuts may not be tightly tightened during installation. If the leakage is not serious, you can apply cement at the place where the air leaks or leaks, or apply cement paste mixed with asphalt oil. Temporary repairs may be coated with wet mud or soft soap. If there is water leakage at the joint, tighten the nut with a wrench. If the water leakage is serious, you must disassemble and replace the cracked pipe. If you reduce the lift, push the pump nozzle into the water for 0.5m.
Severe vibration of the pump mainly has the following reasons: unbalance of the electric rotor; poor coupling coupling; bending of the bearing wear; loose parts and parts of the rotating parts; Can be adjusted, repaired, reinforced, straightened, replaced, etc.
The above situation is the common cause of pump failures. It is not the whole cause. In practice, failures are handled. For actual analysis, the principle of first outside and outside should be followed and blindness should not be used.
There are four reasons for the overheating of the supporting power motor. The first is power supply reasons: the voltage is high or low. Under certain load, if the voltage variation range should be +10% to -5% of the rated value, it will cause the motor to overheat; the three-phase voltage of the power supply is asymmetric, the power supply Three-phase electric voltage phase imbalance degree exceeds 5%, will lead the winding to overheat; lack of phase operation, experience shows that the agricultural motor is burned down more than 85% is due to the lack of phase operation caused by the lack of phase protection motor installation device. The second is the reason of the pump: the use of power is not matched, the small horse-drawn cart, the motor overload operation for a long time, so that the motor temperature is too high; the motor is started too frequently, the motor rated for a short time or intermittent work. Limit the number of start-ups, use thermal protection correctly, and use the rated value on the motor. The third is the reason of the motor itself: the connection method is wrong, the △ shape is mistakenly connected into a Y-shape, so that the temperature of the motor rapidly rises; the stator winding has a phase-to-phase short circuit, a short circuit between the windings, or a partial grounding; when the light motor partially overheats, the insulation is severe. Burnout; squirrel cage rotor broken or defective, the motor running for 1 to 2 hours, the core temperature rises rapidly; the ventilation system fails, you should check whether the fan is damaged, the rotation direction is correct, whether the ventilation hole is blocked; bearing wear, rotor Eccentric brooms cause the stator core to rub out a metal impact sound, and the temperature of the core rapidly rises. In serious cases, the motor smokes and even the coil burns. Fourth, the cause of the work environment: the motor windings are damp or dust, oil, etc. adhere to the windings, resulting in reduced insulation. The insulation resistance of the motor should be measured and cleaned and dried; the ambient temperature is too high. When the ambient temperature exceeds 35°C, the high intake air temperature will cause the motor's temperature to be too high, and efforts should be made to improve its working environment. Such as scaffolding shade and so on. Note: If there is a failure due to electrical reasons, an electrician with a professional qualification certificate is required to repair it. A person with little knowledge should not blindly repair it to prevent personal injury accidents.
The deep well submersible pump first looks at the current difference between the current running at the pump and the time when the pump is running. If it is smaller than usual (essentially 2/3 of the current), there will be problems such as wear of the impeller and blockage of the top non-return valve of the pump head. If the current is the same in peace time, it is the leakage of the pipe mat, the leakage of the pipe, and the leakage of the pump body. If the current is larger than usual, it is basically possible to determine the wear of the consumable. In addition, if the cable is damaged, the amount of water is the same as usual, but the current will increase. The current of 3-phase 380V motor is generally 2.2A. The above reasons can be detected by any repair personnel who regularly repair the deep well pump. The cavitation of water pumps The vaporization of water has a certain relationship with temperature and pressure. Under certain pressure, the water begins to vaporize when the temperature rises to a certain value; if the pressure drops to a certain value at a certain temperature, the water is similarly It also vaporizes, calling this pressure the vaporization pressure of water at this temperature. If during the flow process, the pressure in a local area is equal to or lower than the vaporization pressure corresponding to the water temperature, water will vaporize there. After vaporization occurs, many small bubbles of steam and gas are formed. When the bubbles flow from the low pressure zone to the high pressure zone along with the water flow, the bubbles burst under the action of the high pressure, and the high pressure water flows to the space occupied by these original bubbles at a very high speed, forming an impact force. The surface of the metal is severely damaged due to the formation of fatigue under the action of water hammer pressure. Therefore, the entire process in which we form, develop, and rupture a bubble to destroy the material is called cavitation. The simple maintenance program of the pump In the long-term operation of the pump, the bearing housing of the water pump bearing frame often wears, the bearing position wears, the crack of the pump body cracks, the pump cavitation erosion, erosion wear and so on. After the above problems occur, the traditional solution for the enterprise is repair welding or machine repair after brush plating. However, both of them have certain disadvantages: the thermal stress caused by the high temperature of the welding cannot be completely eliminated, and the material damage is easily caused, resulting in bent or broken parts. The brush plating is limited by the coating thickness, and it is easy to peel off. Moreover, the above two methods all use metal to repair metal, and cannot change the "hard to hard" cooperation relationship. Under the combined effects of various forces, it will still cause re-wear. Contemporary Western countries have used the repair method of polymer composites to solve the above problems, and many of them have used Mage Technology products, which have superb adhesion and excellent compressive strength and other comprehensive properties. The application of polymer material repair can be disassembled and machine-free. There is no effect of repair welding thermal stress, and the repair thickness is not limited. At the same time, the metal material possessed by the product does not possess the concessional property, can absorb the shock shock of the equipment, avoid the possibility of re-wear, and greatly extend the service life of the equipment components. Companies save a lot of downtime and create huge economic value.