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How to increase the anti-abrasion performance of slurry pumps?
Do pump offers slurry pump, sand pump, dredge pump, submersible dredge pump, which is also called heavy duty agitator pump, submersible sand pump, submersible dredge pump, or submersible sludge pump, which can handle sand, gravel, rock, solid with water dredging and piping.This article is going to explain How to increase the anti-abrasion performance of slurry pumps?
How to increase the anti-abrasion performance of slurry pumps?
The centrifugal slurry pump is a kind of centrifugal pump. It is a device that increases the energy of the mixed medium of liquid water and solid particles through the centrifugal force generated by the rotation of the impeller of the pump. The design principle of the centrifugal slurry pump is similar to that of ordinary The design principles of centrifugal pumps are basically the same. But what the slurry pump transports is a mixed fluid of liquid and solid, and its working medium is no longer just a simple one-way fluid. From this point of view, its design principle is different from the design method of ordinary centrifugal pumps.
At this stage, most of the domestic traditional slurry pump designs are based on the experience design of unidirectional flow theory. The shaft seal of the slurry pump designed by this design method has serious leakage, low working efficiency, poor wear resistance of the overflow part, and short service time. Judging from the current situation, there are two major problems in the work of centrifugal slurry pumps that need to be solved urgently, namely: the first problem is the wear of the parts in the flow part of the slurry pump. The second problem is the low efficiency of the centrifugal slurry pump. Because the parts of the centrifugal slurry pump flow through can directly lead to the loss of working materials, it will also cause a series of indirect consequences, such as safety issues, service life issues, etc. The economic efficiency of the slurry pump is not fully reflected.
How to increase the anti-abrasion performance of slurry pumps?
Mainly manifested in:
1) Affect the working efficiency of the slurry pump. Because the blades of the centrifugal slurry pump wear out with the gap between the pump body during the continuous rotation, the space in the slurry pump becomes smaller, and the slurry pump transportation conveyor belt has potholes due to increased wear. This phenomenon seriously affects the efficiency of the centrifugal slurry pump; 2) Increased maintenance time. Due to the increasing degree of wear and tear in the slurry pump, daily maintenance can no longer guarantee the normal operation of the slurry pump, which significantly increases the number of repairs, and the maintenance work time will gradually increase; 3) affect the slurry pump running result. We know that when the conveying contact surface of the centrifugal slurry pump is in operation, strong friction occurs with the solid-water mixture in the slurry, forming many tiny pit-like pits, causing unstable rotation and The huge noise causes particle impact on the blades of the slurry pump to cause abrasion, which may turn into wind erosion in severe cases, shortening the use time of the shaft and mechanical seal of the centrifugal slurry pump, and affecting the operation effect of the slurry pump.
2 Research on the formation of centrifugal slurry pump wear
The wear and tear of centrifugal slurry pumps during operation is a very common situation, which is an insurmountable problem in today's industrial and mining production. The main function of the centrifugal slurry pump is to transport the slurry, but because most of the slurry is a solid-water mixed particulate matter with strong corrosiveness and destructive ability, when these materials pass through the flow part of the pump at a certain speed At that time, it will definitely interact with the impeller of the pump body and impact, and the impeller will lose its due effect under the continuous impact. Therefore, we can see that due to the abrasion of solid-liquid mixed particles, on the one hand, the pump body parts of the slurry pump can be damaged, on the other hand, it also reduces the working efficiency of the slurry pump to a certain extent, so that the entire pump is stable. The capacity is weakened. Under repeated action, the flow condition of the solid-liquid particle slurry in the slurry pump will be further deteriorated. When it reaches a certain range, cavitation will form. In the process of exploring the reasons and formation process of the slurry pump wear, the wear problem caused by hydraulic machinery was proposed in the early stage. However, there are considerable difficulties in observing and researching the slurry pump during its rotation. During the operation of the body, it interacts with liquid water as a medium, which brings great difficulty to the research of slurry pump wear. Therefore, the research results on the slurry pump body wear are very rare. We put the slurry pump system in a closed environment for abrasion test, and started to measure the abrasion of the pump body by means of the surface coating of the pump body. The result of measuring the abrasion of the slurry pump is: direct slurry solid particles Impact, turbulent impact and sliding friction through side avoidance. These three causes of wear correspond to corresponding forces, respectively, which are related to the dynamic stress, diffusion stress and load-bearing stress of the solid phase. The wear caused by these three forces is the sum of the specific wear rate. Through the research on the formation of slurry pump wear, it can be seen that it mainly uses the non-viscous flow model to calculate the flow field value of the mixed liquid, and calculates the corresponding velocity by the dynamic balance of the slurry solid-liquid particles in the pump body. , Use the particle diffusion and convection equation to calculate the distribution of the slurry particle concentration. Through the above content, we can more accurately measure the cause of slurry pump wear and the consequences of wear.
3 Research on anti-wear technology of centrifugal slurry pump
3.1 Discussion on anti-wear technology in operation
The use time and running time of the slurry pump are directly related to whether the operation and maintenance of the slurry pump is scientific or not. During the operation, the operators strictly follow the slurry pump use rules and perform regular maintenance according to the maintenance cycle to ensure that the slag The slurry pump increases its service life and at the same time its performance is well reflected. Therefore, during the use of the centrifugal slurry pump, the centrifugal pump should be in a good state of use according to the wear of the slurry pump, and the operation should be carried out in strict accordance with the requirements of the actual operating guidelines to solve the slurry pump and flow system For transmission problems, do a good job of adjustment to reduce the friction of the slurry pump and extend its service life.
3.2 Selection of anti-wear materials
The material of the flow part of the centrifugal slurry pump plays a key role in enhancing the anti-wear ability of the centrifugal pump. The quality of the over-flowing material directly affects the use time of the centrifugal pump. Good materials can effectively increase the operating life of the slurry pump and ensure the safety and stability of the slurry pump. When choosing wear-resistant materials, there are generally two major parts: one is non-metal wear-resistant materials and metal wear-resistant materials. Non-metal anti-wear materials include engineering plastics, ceramics, silicon carbide, etc.; metal anti-wear materials include carbon steel, wear-resistant alloy steel, white cast iron, and austenitic high manganese steel. Among them, non-metal anti-wear materials have strong acid resistance and alkali resistance, which are unmatched by metal anti-wear materials. Therefore, non-metal anti-wear materials have been widely used in the manufacture of solid-liquid pumps. Such as various ceramic products, metal matrix composite materials and non-metal composite materials to produce flow parts. Due to the good mechanical properties of anti-wear metal materials, it is convenient for machining, so in most centrifugal slurry pumps, metal anti-wear materials are often used as the material of the flow parts.
For more information related to Slurry Pump solutions-How to increase the anti-abrasion performance of slurry pumps?, contact China Do Pump at info@dopumpgroup.com or call us at +8615031104888.
