What causes the motor bearing of the decanter centrifuge to heat up?

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What causes the motor bearing of the decanter centrifuge to heat up?

Decanter centrifuge is a conventional laboratory centrifuge, widely used in biology, chemistry, medicine and other scientific research and education and production departments. It uses the strong centrifugal force generated by the high-speed rotation of the rotor to separate the components in the liquid and solid particles or liquid mixtures. It is suitable for quick separation and composition of trace samples.

   If you feel that the motor is heating up, you should pay attention to the operation of the decanter centrifuge. This may be related to the heating of the motor bearing, but what is the reason for the heating of the motor bearing?

       1. It may be the centrifugal overload or overload, or the cooling fan may have problems. Also pay attention to the usual use habits or the heat generated by mechanical friction, but the main reason is whether the bearings of the centrifuge are good Yes, if the user chooses low-priced bearings for low prices, such bearings will simply heat up, and may even burn out. Therefore, users must choose authentic bearings, and don't choose cheap products for cheap. Even if it is the same brand, its quality may be different if its origin is different.

   2. Pay attention to maintaining the lubrication of the machine. Use high-quality high-temperature lithium-based grease. The quality of the lithium-based grease is another main cause of bearing heat. At the same time, we need to observe in detail, if mechanical friction is accompanied by noise, and the mechanical parts will have significant wear, this indicates that the bearing is experiencing problems and the bearing needs to be replaced. Therefore, it is recommended that people buy big-brand bearings and centrifuges that serve high-speed equipment. High-speed is to use good bearings. Only high-quality bearings can ensure the long-term normal operation of the centrifuge.

   3. Is the concentricity of the decanter centrifuge spindle accurate? Generally, if the concentricity of the spindle tends to be large, it is very easy to cause bearing heating. At this time, the centrifuge motor production is required to have strong skills and production capacity. In the real society, some centrifuge manufacturers buy their own materials to assemble themselves in order to save costs. This will cause the spindle concentricity deviation, which will result in bearing heating .


How to clean a decanter centrifuge

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How to clean a decanter centrifuge?


The cleaning work of the decanter centrifuge in detail is to stop the centrifuge first, then close some corresponding valves, etc., open the clean water valve, and rinse with clean water for 3-5 minutes. Close the clean water valve, let the centrifuge run for a while and then stop it, so that the remaining water in the centrifuge will be discharged automatically. If the water is clear, it means that it is cleaned. If the water is very dirty, it means that it has not been cleaned, and it should continue until the water is clear.

The differential in the decanter centrifuge is the part that is prone to failure. The differential in the decanter centrifuge has abnormal noises during operation. Then, in the detailed reason, it is a problem with the differential, for example, there is a problem with the parts of the differential, or there is no Installation in place, etc., will cause the above problems. Therefore, before work, check the differential to prevent the above problems. There is always a day of failure, and the differential in the decanter is the part where it is prone to failure.

If the differential in the decanter centrifuge has abnormal noises during operation, then, in detail, it is a problem with the differential, such as a problem with the components of the differential, or If it is not installed in place, it will cause the above problems. Therefore, before work, check the differential to prevent the above problems.

The decanter centrifuge uses the principle of centrifugal sedimentation to separate the drilling suspension. The solid phase is pushed to the slag discharge port at the small end of the drum through the blade on the screw pusher, and the liquid phase is It flows out through the overflow hole at the big end of the drum. To achieve the purpose of continuous separation.


Working principle of sludge dewatering decanter centrifuge

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Working principle of sludge dewatering decanter centrifuge

The working principle of the sludge dewatering decanter centrifuge is: the drum and the screw rotate at a high speed in the same direction at a certain differential speed, and the material is continuously introduced into the inner cylinder of the conveying screw through the feeding pipe, and then enters the drum after being accelerated. Heavy solids are deposited on the drum wall to form a sediment layer. The conveying screw continuously pushes the deposited solid phase to the cone end of the rotating drum and discharges it out of the machine through the slag discharge port. The lighter liquid phase forms an inner liquid ring, which continuously overflows the drum from the overflow port at the large end of the drum, and is discharged out of the machine through the liquid discharge port.

This sludge dewatering decanter centrifuge can continuously feed, separate, wash and unload materials at full speed. It has the characteristics of compact structure, continuous operation, stable operation, strong adaptability, large production capacity and convenient maintenance. It is suitable for separating suspensions containing solids with a particle size greater than 0.005mm and a concentration range of 2-40%. Widely used in sludge dewatering, chemical, light industry, pharmaceutical, food, environmental protection and other industries.

In terms of environmental protection applications, the sludge dewatering decanter centrifuge mainly refers to the dewatering of the sludge produced in the process of industrial and civil sewage treatment. Today's environmental issues have become the focus of common concern all over the world. Under this background, the value of decanter centrifuges has been reflected. In the past, sewage plants or related treatment plants used self-sedimentation or belt filter presses to dehydrate and concentrate sludge. The test proves that the water content of sludge can be reduced from 98% to 80%, and its volume can be reduced by 10 times. Because of this, the decanter decanter centrifuge has the inherent characteristics of large processing capacity, automatic operation, and good dehydration effect. The protection field has been widely used and promoted. The single product sales of decanter centrifuges account for about half of all centrifuge products, which has established its irreplaceable position. In foreign countries, the first choice for sewage treatment equipment is the sludge dewatering decanter centrifuge.


Anti-corrosion tips for decanter centrifuge

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Anti-corrosion tips for decanter centrifuge

  The most troublesome thing about the decanter centrifuge used in industry is the corrosion that the centrifuge has encountered in the long-term use of chemical raw materials. Now we recommend three ways to avoid or slow down the corrosion of the centrifuge.

   The top of the list, the selection of the raw materials for the decanter centrifuge is very important, because different materials and separation requirements require different models. After the model and main parameters are selected, based on the corrosion resistance of different materials in different environments, the physical and chemical characteristics, cost-effectiveness and other factors are summarized, and the strength data of the parts is fundamentally determined. From the perspective of the data itself, its policy materials are safe.

Second, the organization plan of the decanter centrifuge. An excellent plan can extend the service life of the equipment and ensure the safety of the equipment. Regarding structural planning, the simplest plan to accelerate corrosion is the stress concentration tendency and the crevice environment, sometimes even though metal In the immersion solution, the corrosion rate is small; but it constitutes a gap, because the chemical and electrochemical conditions of the internal solution have changed, which will cause severe crevice corrosion.

  Third, one of the fundamental ideas for controlling the corrosion of the decanter centrifuge is to block the corrosive environment. In the planning of centrifuges, exterior treatment methods are often used, such as flanges, galvanizing, chrome plating, chemical plating, etc. These methods are useful in many environments, but regarding rotating parts, it is necessary to pay attention to a main appearance: The base material and the coating are two kinds of materials, and their linear expansion coefficients are different. Different deformations will occur when the rotating parts are elastically deformed, and then a lot of micro-cracks will occur; if the aforementioned appearances exist, the corrosion will be accelerated constitute. Therefore, the appearance protection methods of rotating parts should be carefully selected.


Safety instructions for decanter centrifuge

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Decanter centrifuge is a high-speed rotating equipment. When operating and maintaining the equipment, you must strictly abide by the operation and maintenance procedures to ensure the safe and reliable operation of the equipment. We recommend following practical rules in actual use.


   1. Cultivate the good habit of paying attention to safety at all times to avoid human body damage or equipment damage.

   2. Before installing, operating and maintaining the equipment, you should understand the structure of the equipment and be familiar with the contents of this manual.

   3. Safety protection measures should be taken when operating the centrifuge or working close to the centrifuge.

      4. Before disassembling wires or overhauling the centrifuge, you must cut off the motor starter, fuse box or line switching power supply. Before starting the overhaul of the equipment, you must check again and confirm that the power supply has been cut. In order to prevent accidental startup of the device and write errors.

  5. If the equipment is remotely controlled or automatically operated, a sign indicating that the equipment can be started automatically should be placed near the equipment. If the equipment starts automatically without permission, it will cause personal injury or death.

  6. ​​The wires and control components used must comply with the relevant national electrical standards, and the centrifuge and related equipment must be well grounded. Electrical work on the centrifuge and related equipment must be completed by electrical personnel who have obtained the electrical certificate.

  7. When the decanter centrifuge is being sent off, it is strictly forbidden to put hands, clothes or other things: such as tools and other objects close to rotating or moving parts and inlets and outlets to prevent casualties.

       8. Do not start the equipment before the protective device and the sight hole cover are installed. It is strictly prohibited to disassemble the protective equipment and the sight hole cover when the equipment is in operation. All protective devices and covers shall be installed after the equipment is repaired, and they shall be in good working condition. status.

     9. It is strictly forbidden to use the lifting lugs on the bearing seat or the top of the equipment shell to lift the entire centrifuge, because the lifting lugs cannot bear the heavy green load of the entire equipment. When lifting the entire equipment, the whole machine should be lifted through the corner of the machine base. Lift the lifting lugs, otherwise it will cause personal injury or death and/or damage the equipment or other equipment.

     10. Cranes, hoisting equipment, hoisting chains, wire ropes and other equipment used for hoisting must undergo strict inspections before hoisting, and confirm that these equipment are safe and feasible and have a large safety factor for the maximum equipment load required to be hoisted. Otherwise, it will cause personal injury and/or damage to this equipment or other equipment.

     11. Lifting equipment, wire ropes or chains should be fixed to prevent the equipment from tilting or sliding when lifting. Before lifting the entire equipment or large pieces from the base or the ground, you should test whether it is balanced or touched Objects, otherwise it will cause personal injury or death and damage this equipment or other equipment.

     12. Confirm that the power cord of the hoisting equipment has been disconnected and that it will not touch the upper body of the hoisting equipment or the cables near the hoisting area. These wires or cables should be cut and removed, otherwise it will cause personal injury or death and the equipment The accident was damaged.

  13. Be careful not to stretch your hands and feet under the lifting equipment or on the floor where the lifting equipment is to be placed.

  14. When it is necessary to repair any part of the centrifuge safely, it is strongly recommended that the repair be carried out by our factory or under the guidance of personnel designated by our factory, otherwise it may cause personal injury and death accidents and damage to the device or other equipment accidents.

   15. When handling lubricants, solvents or parts with a temperature higher than 40°C, be careful not to get burned.

  16. The differential lubricant cannot be overfilled, because too much lubricant will cause the differential (working) temperature to be too high and cause malfunctions. Please refer to "Lubrication".

  17. The decanter centrifuge has a large inertia, so it will continue to run for a long time after the power is cut off. You must wait for the centrifuge to completely stop rotating before proceeding to maintain it. Only 10-20 minutes after switching on the new power supply can the centrifuge completely stop rotating.

   18. If the materials processed by the centrifuge are toxic or harmful media, very effective measures must be taken to prevent the human body from inhaling or directly contacting these toxic or harmful media, liquid or gas. For example: Wear protective work clothes, glasses, gas masks, anti-berry masks and "three tight" work clothes.

  19. Only when the power supply of the centrifuge has been cut off and the rotation of the centrifuge has been completely stopped, can the machine be inspected or adjusted, otherwise it will cause personal injury or death and damage to the machine or other equipment accidents.

   20. Do not adjust any parts of the centrifuge, otherwise it will cause personal injury or death or damage to the equipment or other equipment accidents.