What are the vulnerable parts of a pump? How much do you know? Collect!

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What are the vulnerable parts of a pump? How much do you know? Many users lack awareness of the pump’s vulnerable components and fail to perform regular maintenance on them, which leads to the damage of these parts. Therefore, Editor Reicht will now explain to you the wear-prone parts and maintenance methods of commonly used pumps in the chemical industry. The details are as follows. Magnetic pump: 1. The bearings of a magnetic pump are vulnerable components; *the most common cause of damage is the presence of debris inside, and this debris needs to be removed in order to fix the issue. 2. The pump shaft of a magnetic pump is also a vulnerable component. When pumping media with high specific gravity and without soft start functionality, there can be sudden pressure drops or water hammer effects in the magnetic pump, which may lead to the breakage of the pump shaft. 3. The sealing rings of magnetic pumps are usually made of soft or corrosive fluororubber; an inappropriate choice of material is also a cause of frequent damage. 4. The internal and external magnets of magnetic pumps, when exposed to high temperatures for extended periods of time, are prone to demagnetization, which results in performance levels that do not meet the required standards. If the internal and external magnetic fields of a corrosion-resistant magnetic pump fail, it is necessary to replace the internal and external magnetic components. 5. The impeller of a magnetic drive pump is the key component for pumping liquids. If it frequently handles acidic liquids, it can easily become damaged; therefore, it needs to be replaced or repaired periodically. Generally, the service life of an impeller can exceed ten years, but if it is not used properly, it needs to be replaced regularly. 6. The isolation sleeve of a magnetic drive pump is also one of the vulnerable components. The magnetic coupling of the pump is cooled by the medium being pumped. If there are hard particles in the medium, it can easily cause scratches or even punctures in the isolation sleeve. In some cases, improper maintenance methods may also lead to damage to the sleeve. Diaphragm pump: As a new type of pump, the pneumatic diaphragm pump has gained widespread popularity among users due to its ease of use, its ability to handle various corrosive liquids and particulate media, and its low cost. At the same time, this pump has certain vulnerable components. 1. Diaphragm, as the main core component of diaphragm pumps. They include PTFE diaphragms, F46 diaphragms, nitrile diaphragms, neoprene diaphragms, etc. Select a suitable diaphragm based on the different media. Due to the constant flexing motion it undergoes during the operation of diaphragm pumps, it is the first component to suffer damage. Normally, four pieces should be kept on hand for timely replacement. 2. Ball and tee. It is divided into PTFE material, nitrile, neoprene, ceramic, and stainless steel. When the pump is not in operation, the ball rests on the circular hole in the socket; when it is in operation, the ball moves up and down continuously. This inevitably leads to the balls and their seats bumping into each other, resulting in uneven wear and poor sealing. Usually, four balls and ball stands should be available. Shielded pump: Chemical shielded pumps are products with an integrated pump and motor design; their fully enclosed, leak-proof structure enables them to transport toxic and hazardous liquids. The canned pump utilizes graphite sliding bearings lubricated by the pumped medium, resulting in lower operating noise and eliminating the need for manual lubrication, thereby reducing maintenance costs. However, if the bearings of the shielded pump wear out, it will affect the reliable operation of the equipment. Next, we will introduce the main types of damage that can occur to canned motor pumps, as well as how to determine whether a canned motor pump is damaged or not. 1. Graphite bearings, bushings, and thrust plates are damaged due to wear or dry friction caused by a lack of lubricant. 2. Damage to the stator and rotor shielding sleeves. The main cause of damage to the shielding sleeves is bearing failure or wear exceeding the limit values, which leads to friction between the stator and rotor shielding sleeves and resulting damage ； Secondly, chemical corrosion causes leaks at welds and other locations. 3. Damage to the stator winding. In addition to the causes of stator winding damage that are common to ordinary motors, such as overload, inter-turn short circuits, and ground breakdown, there is also damage to the motor windings due to medium erosion caused by damage to the stator shielding sleeve, which leads to insulation failure of the windings. Shielded pumps use graphite bearings and are lubricated by the liquid being transported. The wear condition of bearings is crucial for reliable operation. To monitor the wear condition of bearings, mechanical or electromagnetic bearing monitors are generally installed. When the wear of the bearing exceeds the specified allowable value, the pointer on the monitor dial will point to the red area, indicating an \"alarm\". The operation should be stopped immediately at this point to conduct an inspection. If the wear level of the bearing has exceeded the limit value, a new graphite bearing should be installed; otherwise, it may lead to friction between the stator and rotor shielding sleeves, eventually causing damage to these sleeves. This can result in the liquid medium penetrating the stator windings and other components, thereby damaging the motor. As can be seen from the analysis above, the vulnerable parts of the pump wear out due to normal use or improper operation; by carrying out regular maintenance, the likelihood of failures caused by these vulnerable components in magnetic pumps can be significantly reduced.