Views: 0 Author: Site Editor Publish Time: 2021-03-20 Origin: Site
Centrifugal pump is a common equipment in mechanical engineering, which can be applied in various chemical, electric power and construction industries. With the development of industry, more and more companies are paying attention to the use of centrifugal pumps. However, the centrifugal pump will have the problem of vibration after using for a period of time. This article will combine some common practical problems of centrifugal pumps to make a simple analysis of centrifugal pumps.
·How does the centrifugal pump work?
·What are the causes of vibration in centrifugal pumps?
·Analysis of mechanical seal failure of centrifugal pumps.
The main components of single stage centrifugal pump are impeller, pump casing and shaft seal device. The centrifugal pump works by using the impeller to rotate and make the water to have centrifugal movement. After the centrifugal pump starts, the impeller is driven by the shaft to rotate at high speed, and the liquid between the vanes must also rotate with it. Under the action of centrifugal force, the liquid is thrown from the center of the impeller to the outer edge and gain energy to leave the outer edge of the impeller at high speed into the worm-shaped pump casing. In the worm casing, the liquid decelerates due to the gradual expansion of the flow channel, and transforms part of the kinetic energy into static pressure energy, and then flows into the discharge pipe at a higher pressure and is sent to the required place.
Loose foundation bolts and unadjusted level of calibration can lead to vibration of the multi stage centrifugal pump. Therefore, before the centrifugal pump works, we recommend to check whether its foundation bolts are loose and whether the installation of the centrifugal pump is level. These can also cause the centrifugal pump to vibrate when it is working.
There may be some foreign objects such as weeds in the water inside the centrifugal pump, which is also a common cause of vibration of the centrifugal pump. Therefore, before using a centrifugal pump, it is best to check the inside of the pump.
If there are unreasonable design aspects of the centrifugal pump, such as the size of the parts and other issues. However, this is relatively rare. Before leaving the factory, centrifugal pumps are tested several times inside the workshop to ensure the qualified rate of the factory centrifugal pumps. Therefore, we recommend purchasing centrifugal pumps made by large manufacturers, which is also for after-sales service considerations.
In addition to the above-mentioned cases, material blocking uneven, parts structure is not qualified, resulting in the centerline of rotor mass and the centerline of the rotor shaft do not coincide to produce eccentricity according to the formation of imbalance can lead to the case of centrifugal pump failure. Therefore, regular maintenance of centrifugal pumps is very important to avoid damage leading to greater repair costs.
The reason for this situation is because the end face flatness, roughness does not meet the requirements, or the surface is scratched; there is particulate matter between the end faces, causing the two end faces to not run equally. At the same time, the installation method is also an important consideration, the installation is not in place, the way is not correct may lead to the static and dynamic ring sealing surface leakage.
Gland deformation or uneven preload force can lead to compensation ring seal leakage. In addition, incorrect installation, the quality of the seal ring does not meet the standard, and the incorrect selection of the seal ring is also a predisposing factor.
With the above information, do you have a further understanding of submersible centrifugal pumps? When using centrifugal pumps, it is important to check and repair them regularly to avoid the failure of mechanical equipment. Our company produces various models of centrifugal pumps. Shanghai Sotuo Pump Co., Ltd. is a professional pump supplier integrating pump development, manufacturing, sales and service. Our company has strict quality control for each centrifugal pump, and we hope to bring you the best quality service.
