Causes of slurry pump failures and usage precautions
Release time:
2022-03-24
Source:
The lubrication of the slurry pump not only needs to consider the oil level and oil quantity of the lubricant but also the viscosity of the lubricant. When the viscosity of the lubricant is insufficient, the centrifugal pump will vibrate. During the operation of the centrifugal pump, the temperature of the bearing box will rise, and when the temperature increases, the viscosity of the lubricant will decrease. Therefore, when testing the oil level and oil quantity of the equipment, it is also necessary to ensure that the temperature of the equipment is within an appropriate range. When the equipment temperature rises, it is important to promptly identify the cause; otherwise, poor lubrication can also lead to bearing vibration and damage.
The lubrication of the slurry pump not only needs to consider the oil level and oil quantity of the lubricant but also the viscosity of the lubricant. When the viscosity of the lubricant is insufficient, the centrifugal pump will vibrate. During the operation of the centrifugal pump, the temperature of the bearing box will rise, and when the temperature rises, the viscosity of the lubricant will decrease. Therefore, when testing the oil level and oil quantity of the equipment, it is also necessary to ensure that the temperature of the equipment is within an appropriate range. When the equipment temperature rises, it is important to promptly identify the cause; otherwise, poor lubrication can also lead to bearing vibration and damage.
In cases of 'micro-vibration', the bolts of the slurry pump may loosen. When reinstalling after maintenance, some thread lock can be applied to the bolts and secured with a locking agent, which can prevent bolt loosening and damage. During disassembly, a loosening agent can simply be heated to melt, requiring a small investment but is crucial for reinstalling equipment.
Regarding the stability of slurry pump feeding, this is an issue of selection and installation. However, if sedimentation or large particle blockage occurs in the slurry during later use, it can lead to feeding processes that do not meet the flow requirements of the slurry pump, necessitating cleaning of pipes and valves. When controlling flow, try to reduce the operating frequency of the slurry pump as much as possible. Thirdly, adjust the outlet valve; flow cannot be controlled by adjusting the inlet valve.
The failure of a slurry pump often begins with subtle abnormal vibrations that gradually worsen. Throughout the failure process, there are many aspects that need to be summarized and analyzed. Abnormal vibrations are not only a sign of failure but also an important cause of exacerbating failures. Abnormal vibration analysis is a method for fault diagnosis. If equipment failures are not addressed in a timely manner based on vibration conditions, it can lead to a vicious cycle. The more severe the vibration, the more failures occur, leading to even more severe vibrations in the slurry pump.
Hydraulic slurry pumps are lightweight, compact, efficient, and versatile. They can continuously pump clean water or wastewater containing particles with diameters ranging from 25 to 65 millimeters. They are widely used in urban drainage, septic tank extraction, sewage wells, and sewer cleaning. Compared to ordinary water pumps, hydraulic slurry pumps have the following advantages:
1. Corrosion resistance. The fully hydraulic slurry pump is precision cast from 304 stainless steel. Under normal use, it can be used continuously for several years without corrosion.
2. Solid materials can be discharged. The impeller of the slurry pump adopts a vortex design; as the impeller rotates, it causes liquid or slurry within the pump body to circulate. Under centrifugal force, a cone is formed that minimizes contact between liquid or slurry and impeller, reducing friction. It features long service life, high reliability, and capability to extract large solid particles.
3. Safety. Because hydraulic slurry pumps do not require electricity and do not leak, there is no need to worry about leaks even if people work in water alongside the slurry pump.
4. Can run dry. Since power is provided by a hydropower station which has its own hydraulic oil cooler, even if the slurry pump runs dry, it will not overheat and damage the pump.
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