Due to the unique operating environment of centrifugal water pumps, their internal structure contains a large amount of conductive substances, which can easily lead to unstable water pressure and high bearing temperature, affecting the stability and safety of operations. This requires relevant personnel to comprehensively investigate common problems during the operation of centrifugal water pumps, integrate daily maintenance experience and effectiveness rules of centrifugal water pumps, in order to comprehensively ensure the effectiveness of centrifugal water pump maintenance and repair work, and lay a foundation and guarantee for the use and operation of centrifugal water pumps.
Overview of the working principle of centrifugal water pump
The main working principle of a centrifugal water pump is to perform centrifugal motion treatment on its internal water resources, and transport and transfer water resources in the form of a pump. The first step of its operation is to fill the interior of the centrifugal water pump with water, and use the rotating impeller inside the pump to drive the required water to rotate at high speed, so that the internal transportation environment of the centrifugal water pump generates a mechanical centrifugal force that meets the standard, thereby throwing the required water resources out towards the outlet. At the same time, a low-pressure area is synchronously formed near the water resource inlet shaft to guide external water storage resources into the centrifugal water pump, thereby achieving a cyclic pumping and water delivery effect.
In the working structure of a centrifugal water pump, the motor and impeller are key factors for its normal and smooth operation, directly related to the safety and actual efficiency of the centrifugal water pump operation. Therefore, in the daily troubleshooting of centrifugal water pump faults, relevant personnel should focus on the performance and losses of these two parts, effectively ensuring the basic power support and overall stable operation of the centrifugal water pump. In addition, relevant personnel also need to observe and test whether the steel structure of the centrifugal water pump can withstand the water pressure and internal impact caused by the operation of the pump during regular inspections. Corresponding mechanical testing equipment can be used to test the stiffness and strength of each component and the overall structure of the centrifugal water pump, in order to ensure the operational performance of each internal structure and component of the centrifugal water pump.
Common faults and performance analysis of centrifugal water pumps
During the operation of a centrifugal water pump, it is necessary to rely on the support and drive of external electrical energy to achieve high-speed rotation of the impeller. The impeller can drive the water to undergo centrifugal operation during high-speed rotation, thereby achieving rapid introduction and transportation of water. The internal structure of the centrifugal water pump involved in this process is very complex, closely related to the mutual influence and coordination of structural components such as the impeller, bearings, pump shaft, and impeller of the centrifugal water pump. These components mainly include mechanical and electrical structures. Once there is a problem between each structure and component, the entire centrifugal water pump unit will be paralyzed, resulting in the obstruction of internal transportation of the water body.
1. The bearing temperature is too high
Due to the fact that the operation process of centrifugal water pumps is a continuous process of mechanical energy doing work, the bearings need to maintain high-speed operation for a long time during this process. This process inevitably generates a large amount of frictional heat in the short term. Once this heat is not discharged and dispersed in a timely manner, exceeding the bearing temperature standard will lead to the problem of excessive bearing temperature. When the temperature of the bearing exceeds the standard and is too high, it may cause the transformer line to burn out, directly affecting the normal operation and use of the internal electrical structure of the centrifugal water pump.
At the same time, the substandard quality and performance of lubricants or the mismatch between lubricant type and bearing model can also lead to the problem of high bearing temperature. The failure of lubricants can result in low lubrication between bearings, increasing ineffective friction between bearings and other components, ultimately generating a large amount of heat during long-term operation, which to some extent reduces the quality and service life of centrifugal water pump bearings and the overall unit.
2. Vibration frequency and amplitude are too high
Slight vibration within a reasonable range is one of the normal manifestations of centrifugal water pump operation, but once the vibration frequency and amplitude of the centrifugal water pump exceed the reasonable range, it indicates mechanical operation failure. The rationality of the vibration frequency and amplitude of the centrifugal water pump is an important indicator for evaluating its operational performance. Excessive frequency and amplitude of vibration can directly affect the normal operation of the centrifugal water pump unit, and may also lead to the failure or damage of various structural components of the unit, posing a certain threat to the quality and safety of the overall operation of the centrifugal water pump.
There are various problems with high vibration frequency and amplitude in centrifugal water pumps, such as unreasonable motor and foundation fixing forms, impeller failure, prolonged use, unreasonable pipeline settings, and low precision of transmission components, which can affect the normal operation of centrifugal water pumps. Relevant personnel can inspect and repair centrifugal water pump vibration problems based on the above aspects.
3. Insufficient water output and substandard head
During the operation of a centrifugal water pump, relevant personnel must conduct a certain level of impurity inspection on the transported water body. Water bodies that have not undergone specific inspection may contain excessive large particle impurities, which can easily lead to large-scale blockage of the impeller channel of the pump body, directly affecting the water output and speed of the centrifugal water pump.
Non compliant head is a common problem in the operation of centrifugal water pumps, mainly due to the lack of external work during normal operation. This situation can lead to insufficient power for equipment operation, resulting in serious gas invasion inside the centrifugal water pump, which to some extent affects the normal transportation quality and efficiency of the water body of the centrifugal water pump.
Maintenance strategy for centrifugal water pump faults
1. Standardize the daily operation standards of equipment
In response to various malfunctions that occur during the daily operation of centrifugal water pumps, relevant personnel mainly improve and standardize the daily equipment operation standards from the following four aspects.
1) Parts inspection.
Before officially using the centrifugal water pump, the operator should check in advance whether the various structural components of the pump are intact or meet the standards. Mechanical testing and pre use inspection can be used to ensure the integrity of the various components and structures of the centrifugal water pump.
2) Amplitude observation.
Operators also need to regularly use corresponding electronic devices to check whether the rotation frequency and amplitude are normal, analyze the normal vibration situation and optimal working parameters of the centrifugal water pump in multiple cycles, and always control the vibration frequency and amplitude of the centrifugal water pump within the normal and safe range. Operators should effectively measure and inspect the head range while carrying out the above inspection items, and regularly add lubricating oil and lubricants at reasonable time points according to the actual situation, in order to minimize ineffective friction between the centrifugal water pump bearings and other components, fully improve and extend the quality and service life of the bearings and other components.
3) Water inspection.
During each working cycle of the centrifugal water pump, the operator must closely observe the content of impurities in the water before entering the pump, and at the same time check the density of the filling in the centrifugal water pump to avoid impurities inside and outside the pump blocking the impeller channel and outlet, and to prevent problems such as excessive water pressure and slow water discharge inside the centrifugal water pump.
4) Use time control.
When the centrifugal water pump equipment is temporarily stopped, the operator should promptly close the outlet of the water pump to fully reduce the energy consumption and motor load of the next start-up of the unit. At the same time, the operator should also verify the various usage cycles and status information data of the centrifugal water pump, and maintain the cleanliness of the equipment and pump room during use.
2. Improve equipment maintenance methods
During the maintenance process of various components of the centrifugal water pump, maintenance personnel should pay attention to the influence of mechanical and thermal energy between the components of the equipment, and focus on observing whether there are cracks or fissures in the pump casing of the equipment. Maintenance personnel can use specialized tools to strike the pump casing of the water pump, and judge whether there is damage or the degree of damage to the pump casing by observing the sound response after striking. At the same time, ultrasonic testing technology can also be combined to inspect whether there is unevenness or cracking inside the centrifugal water pump. The main method is to repair the corresponding cracks by welding, and if necessary, replace the corresponding water pump components.
3. Strictly control the quality of equipment installation
In order to effectively ensure the safety and stability of the later operation of centrifugal water pumps, relevant personnel must strictly control the installation quality and stability of each component and part of the unit in the early stage of equipment installation. Based on the guidance of the manufacturer, they should complete the early installation and later testing according to the operating environmental conditions of the centrifugal water pump.
1) The installation personnel should conduct a comprehensive inspection of the quality standards and integrity of each component before officially starting the installation work, ensuring that the quality of each component meets the standards and the overall integrity before starting the overall equipment installation.
2) Installation personnel should pay close attention to the stability of the connection between the water pipes of the centrifugal water pump. The inlet diameter of the centrifugal water pump can be appropriately increased according to the actual use of the water pump, and the inlet diameter of the centrifugal water pump should be ensured to be larger than the inlet diameter of the water pump as much as possible. During the equipment installation process, lubricating oil and fluid should be added at various locations according to the actual situation. After the basic installation is completed, check whether there are water leaks and air intake problems in various water pipes to ensure that the overall inlet pipeline of the centrifugal water pump is not protruding.
3) After the installation of the centrifugal water pump unit is basically completed, the installation personnel can use the corresponding electronic and mechanical testing equipment to conduct comprehensive qualification tests on the overall stiffness, airtightness, and vibration frequency amplitude of the equipment. After multiple inspections are qualified, it can be put into use.
Maintenance measures for centrifugal water pump
1. Strengthen the cleaning and maintenance of equipment after use.
Regular cleaning is an important way to carry out regular maintenance of centrifugal water pump equipment. Maintenance personnel should promptly clean the dust and oil sludge outside the water pump, as well as the debris in the water tank and well, after the water pump is used up. The key is to ensure that there are no interfering impurities around the transmission device of the water pump. At the same time, during this process, the support performance of the equipment water pipe and the integrity and damage of the water pump trash rack or mesh should be checked to ensure that the operation of the water pump is not affected by other impurities and structural damage.
2. Improve the environmental conditions for equipment operation
The operating environmental conditions of centrifugal water pumps directly affect their quality and efficiency, and also involve environmental factors that promote or interfere with the operation of centrifugal water pumps. Therefore, maintenance personnel of centrifugal water pumps should fully pay attention to the improvement and optimization of social operating environmental conditions. The overall operating environment of centrifugal water pump equipment technology can be optimized from three aspects: lighting, antifreeze, and firefighting. At the same time, the lighting, antifreeze, and firefighting facilities of centrifugal water pump rooms can be optimized to fully reduce the environmental interference of centrifugal water pumps.
3. Pay attention to lubrication and maintenance of equipment bearings
Bearings are the core components of centrifugal water pump operation. Maintenance personnel should regularly, quantitatively, and qualitatively replace the lubricating oil or fluid of the centrifugal water pump body and motor bearings, select high-quality and suitable lubricating oil or fluid types, and strictly follow the corresponding lubricating oil and fluid dosage standards for reasonable filling and replacement, minimizing ineffective friction between bearings and other components, thereby improving the operation quality of centrifugal water pump units and extending their service life.
As a type of water pump commonly used in industrial and agricultural production, centrifugal water pump is the core and key to the smooth operation of the entire unit, and is also an important tool required for daily production operations in this industry. Therefore, relevant personnel should attach great importance to the fault repair and daily maintenance of centrifugal water pumps, regularly carry out effective maintenance and repair of various structures and components of centrifugal water pumps, timely eliminate or alleviate various potential safety hazards and risks, comprehensively ensure the continuity and effectiveness of centrifugal water pump production operations, effectively reduce the production and maintenance costs of centrifugal water pumps, and promote the two-way improvement of production quality and production efficiency
