The cause of abnormal sound in the ultra-fine grinder
1. Severe overload causes a heavy "humming" sound inside the ultra-fine grinder contactor.
2. Due to poor contact or breakdown inside, the discharge point occurs, which is the "squeak" or "crack" sound inside the electromechanical disk of the traditional Chinese medicine ultra-fine grinder.
3. Due to the loosening of some parts such as connecting bolts on the top cover of the ultra-fine grinder, the iron core of the traditional Chinese medicine ultra-fine grinding machine is not tightened, causing the vibration of the silicon steel sheet and making a strong noise. If the silicon steel sheets on both sides of the iron core are not tightened, abnormal noise will also occur.
4. When there is a grounding or short-circuit fault in the power grid, a large current flows through the winding, and a strong noise will be emitted.
5. When there are large power equipment or equipment that can generate harmonic current in the ultra-fine grinder, the startup of the large-scale ultra-fine grinding machine equipment or the operation of the ultra-fine grinding machine that generates harmonics may affect the transformer on the site of the ultra-fine grinder. Make a "wow" sound.
6. Due to the ferromagnetic resonance, the transformer on the construction site will make an abnormal sound.
7. If the primary side voltage is too high or unbalanced in the ultra-fine grinder, there will be a little sound.
8. There is overvoltage, the winding or the lead wire is discharged to the shell, or the ground wire of the iron core is disconnected, causing the iron core to discharge to the shell, all of which are the discharge sound of the transformer on the construction site of the traditional Chinese medicine ultra-fine grinding machine.
When abnormal noise occurs in the transformer used in the ultra-fine grinder, the possible cause should be judged. Only when the ultra-fine grinder is well maintained can it work better.
Maintenance of ultra-fine grinder
The maintenance of the ultra-fine grinding machine is an extremely important and frequent work, and it is closely coordinated with the operation and maintenance, and it should be checked by a full-time staff.
The ultra-fine grinder is an equipment that uses air separation, heavy pressure grinding, and shearing to achieve ultra-fine grinding of dry materials. Let's take a look at the maintenance of the ultra-fine grinder:
1. The shaft bears the full load of the negative machine, so good lubrication has a great relationship with the life of the bearing, it directly affects the life and operation rate of the machine, so the injected lubricating oil must be clean and well sealed. The main oil injection points of the machine include: rotating bearings, roll bearings, all gears, movable bearings, and sliding planes.
2. The newly installed wheel tyres are prone to looseness and must be checked frequently.
3. Pay attention to whether all parts of the machine work normally.
4. Pay attention to check the degree of wear of easily worn parts, and pay attention to replacing worn parts at any time.
5. The plane of the bottom frame of the movable device should be cleaned of dust, so as to prevent the movable bearing from moving on the bottom frame when the machine encounters unbreakable materials, which may cause serious accidents.
6. If the bearing oil temperature rises, stop the machine immediately to check the cause and eliminate it.
7. When the rotating gear is running, if there is an impact sound, stop and check it immediately and eliminate it.
Ultra-fine grinding technology is a technology that has been developed and widely used in recent decades. At the same time, the ultra-fine grinder industry has also been rapidly developed, especially in the pharmaceutical industry, and has been more widely used. The future development prospects are promising. It has been successfully applied to many industries such as chemical industry, medicine, machinery and so on. Especially the ultra-fine grinding products produced by the vibration method have the advantages of fine grinding particle size, fully enclosed production process, no pollution, and no loss of nutrients. The ultra-fine grinding machine is all made of high-quality stainless steel to avoid the entry of other impurities; the structure of the whole machine is smooth, the material is crushed and collected sufficiently, and the loss is reduced; the grinding wheel and rail are made of special super-hard stainless steel, which is not easy to wear and has a long service life, thereby reducing the cost.
Common troubleshooting of ultra-fine grinder
Ultra-fine grinders can be divided into dry grinding and wet grinding. According to the different principles of the grinding force generated during the grinding process, dry grinding has airflow, high-frequency vibration, rotating ball (rod) grinding, hammering and self-grinding, etc.; wet grinding mainly uses colloidal grinding and Homogenizer to complete.
The host system of the ultra-fine grinder is composed of an air compressor, an air purifier system, a supersonic jet mill, a classifier, and a cyclone separator. Medium and small fluidized bed type airflow ultra-fine grinders usually combine supersonic jet mills, classifiers and cyclones into an integrated machine, which can greatly save floor space and facilitate installation, transportation and use.
Elimination of common faults of ultra-fine grinder:
1. Reverse injection at the feed inlet: improper adjustment of the air door, blockage of the conveying pipe, clogged sieve, too short powder collection bag or poor air permeability, serious wear on the edge of the hammer, etc. will cause the reverse injection at the feed inlet. When this phenomenon occurs, you should first find out the cause, and then take targeted elimination measures, or adjust the air door to clear the blockage, or exchange the powder bag to increase the air permeability, or replace the hammer.
2. Bearing overheating: When the bearing is poorly lubricated, damaged, or the main shaft is bent, the rotor is severely unbalanced, and the belt is too tight, the bearing will overheat. The bearings can be restored to normal conditions by adding or replacing lubricating oil, replacing bearings, spindles, balancing rotors, and adjusting belt tightness.
3. The grindervibrates strongly:
① If the hammers are installed incorrectly, they should be rearranged according to the requirements of the manual;
② The weight deviation of the corresponding two sets of hammers is too large, and their weight should be balanced so that the weight difference does not exceed 5 grams;
③If the bearing is damaged or the main shaft is bent, it should be replaced in time;
④ The foot connecting screws are loose and should be tightened.
4. There is abnormal sound in the grinder: the parts in the grinder are damaged or falling off, or if hard objects such as rocks or iron enter the machine, abnormal sound will be generated. Stop the machine for inspection immediately, replace the damaged parts and remove the hard objects.
5. Low production efficiency: Insufficient motor power, improper belt pulley preparation, belt slippage, severe hammer wear, uneven feeding or excessive water content of raw materials are the main reasons for low production efficiency. When the above situation occurs, corresponding measures can be taken to solve the problem, or the motor or belt pulley can be replaced to increase the speed, but the rated operating speed should not be exceeded; or the belt tightness can be adjusted, or the belt should be replaced, or the hammer can be replaced. During operation, the feed should be uniform, and a small amount should be fed quickly to maintain continuous and uniformity; the over-wet raw materials should be dried before grinding.
Correct use method of ultra-fine grinder
1. The ultra-finegrinderand power unit should be installed firmly. If the ultra-fine grinder is fixed for long-term operation, it should be fixed on the cement foundation; if the grinder is mobile operation, the unit should be installed on a base made of angle iron, and the power machine (diesel engine or electric motor) and the grinder should be ensured The pulley grooves are in the same plane of rotation.
2. After the grinder is installed, check the fastening of each part of the fasteners, and tighten them if they are loose. At the same time, check whether the belt tightness is appropriate.
3. Before starting the grinding machine, turn the rotor by hand to check whether the claws, hammers and the rotor are running flexibly and reliably, whether there is any collision in the shell, and whether the rotation direction of the rotor is consistent with the direction of the machine arrow, power machine and grinding Whether the machine lubrication is good.
4. Don't change the belt pulley casually, in case the speed is too high to cause explosion in the grinding chamber, or the speed is too low to affect the working efficiency of the grinder.
5. After starting the grinding machine, it should be idling for 2~3min, and then feeding work after there is no abnormal phenomenon.
6. Pay attention to the operation of the grinder at all times during work, and feed evenly to prevent blocking the car, and do not overwork for a long time. If there are vibrations, noises, excessive temperature of the bearings and the machine body, or spraying materials, the machine should be shut down immediately for inspection, and the work should continue after troubleshooting.
Maintenance measures for the ultra-fine grinder, the machine must be cleaned up after the end of daily work. Fill the oil nozzle with lubricating oil at any time to protect the normal operation of the bearing and prolong the service life of the bearing. After working for 1000 hours, the bearing must be cleaned and replaced with calcium-based lubricant to half full to ensure good lubrication during use and prolong service life.
Basic conditions for choosing an ultra-fine grinder
- Material properties
The nature of the material includes the nature and density of the abrasive material. Under the action of the negative pressure airflow caused by the fan, the material ground by the airflow mill is taken out of the grinding chamber, enters the material collection system, filtered by the filter bag, the air is discharged, the material and dust are collected, and the grinding is completed.
The ultra-micro grinding machine is a device that uses air separation, pressure grinding, and shearing to achieve ultra-micro grinding of dry materials. It is composed of cylindrical grinding chamber, grinding wheel, grinding rail, fan, material collection system and so on. The material of the superfine pulverizer enters the cylindrical grinding chamber through the feeding port, and is crushed and sheared by the grinding wheel that moves in a circular motion along the grinding rail to realize grinding.
- Material status
The material status mainly refers to the humidity and temperature of the material. Unlike wet grinding, in dry grinding, the water content of the material cannot exceed 3%, otherwise the processing capacity of the grinder will drop sharply, especially the dry ball mill is more important.
- Material size
Unlike the crusher, the feed size has a great influence on the output of the crusher, and is one of the main factors affecting the processing capacity of the grinder. Therefore, the energy consumption in the crushing and grinding stages is different, and the energy consumption in the crushing stage is much less. It is very important to apply the principle of more crushing and less grinding in the crushing operation. Therefore, in the crushing stage with less energy consumption, the material should be crushed to a finer particle size as much as possible to reduce the energy consumption in the grinding operation.
- Grinding ability
Even if the product needs to be grinded according to the requirements, the crusher can be selected to obtain the same size of material particles, and then the appropriate grinder can be selected according to the type and size.
- Grinding method
Grinding methods are divided into wet and dry methods. Wet grinders: limited to rotary grinders and tower grinders that use steel balls or other media, and there are also many dry grinders. Which type of grinding machine is used is affected by the operation before and after grinding, the number of grinding sections, and the choice of grinding process.
The details that need to be paid attention to when using the superfine grinder
The ultra-fine pulverizer adopts a unique design scheme. After improvement, the blade is no longer used, and the cutter head and liner are specially installed according to the design structure of the fuselage. In order to improve the grinding efficiency and effect, the ultra-fine pulverizer uses high-speed impact force and shear force to make the material in the grinding cylinder subject to the squeezing, kneading and tearing of the medium, which greatly shortens the grinding time and improves the grinding efficiency; At the same time, because the material is fluidized and each particle has the same stress state, its self-viscous effect can make the finished product form a uniformly dispersed and precise composite particle group, increase the density and increase the bioavailability, and improve the micro-grinding effect and technology.
When the ultra-micro grinder is working, the material to be grinded is fed into the machine from the feeding hopper on the side of the machine casing. It relies on the grinding roller device suspended on the plum frame of the main machine to revolve around the vertical axis. At the same time, it rotates on its own. The centrifugal force causes the grinding roller to swing outwards and press tightly on the grinding ring, so that the shovel blade scoops up the material to be sent between the grinding roller and the grinding ring, and the grinding roller achieves the purpose of grinding the material due to the rolling and rolling of the grinding roller.
Wind separation process: After the material is ground, the fan blows the wind into the main frame to blow up the powder, which is sorted by the classification device placed above the grinding chamber. The products that meet the specifications enter the cyclone collector with the wind flow, and are discharged through the powder outlet after being collected, which is the finished product. The wind flows back into the fan from the return duct at the upper end of the large cyclone collector. The wind path is circular and flows under negative pressure. The increased air volume of the circulating air path is discharged through the exhaust pipe between the fan and the main engine and enters the small cyclone collection. Refrigerator for purification treatment.
The ultra-micro grinding machine is composed of three parts: main machine, auxiliary machine, and electric control box. It has various properties such as winnowing type, no screen, no net, uniform particle size, etc. The production process is continuous. The ultrafine pulverizer has reached the international advanced level and is widely used in the pulverization of materials in the pharmaceutical, chemical, and food industries. The ultra-micro grinding machine is a horizontal tilting structure, composed of a base, a motor, a crushing chamber, a cover, and a feeding hopper. The feeding hopper and cover can be tilted to a certain angle, which is convenient for cleaning and repairing the material in the grinding chamber. For processing hard and difficult-to-grind materials, it can also be used as a supporting equipment for the previous process of micro-grinding. It is not restricted by the viscosity, hardness, softness and fiber of the material, and it can have a good grinding effect on any material. .
Precautions for ultra-micro grinding machine:
1. General medicinal materials do not need to be screened by the ultra-micro grinder, but for pearls and stalactites that require precise particle size, please pass the screen.
2. The ground material should be dried, especially the viscous material needs to be dried, so that the ultrafine grinder will have a better crushing effect. The volume should not be too large, about the size of a little finger nail.
3. Do not clean the grinding tank.
4. After using the superfine grinding machine, please unplug the power plug to avoid any danger caused by touching the switch.
5. When the speed slows down, please check whether the aggregate cloth tube of the superfine grinder is well ventilated, or there is too much material in the collecting cylinder. Turn off the power switch).
What are the characteristics of the ultra-fine grinder
Superfine grinders are used in many industries such as food, pharmaceuticals, industry, etc. The advantages of superfine grinders are also very significant.
1. High grinding efficiency: almost no loss and no residue. Under the two-way action of high-speed impact force and shear force, the grinding time is greatly shortened and the grinding efficiency is improved.
2. High grinding fineness: most animal and plant materials can be ground to 150 mesh to 2500 mesh.
3. The grinding temperature of the ultra-fine grinder is low-in the case of continuous operation, its temperature will not exceed 40 degrees.
4. Low grinding cost: less labor, short time, completely airtight grinding process without dust overflow, and no loss of active ingredients. There is very little material loss, which can greatly reduce production costs.
5. Simple operation: optimal configuration of capacity, to ensure complete discharge of materials, simple operation and material change.
6. Convenient maintenance of the ultra-fine grinder: compact structure, small floor space, convenient maintenance and repair.
7. Clean and hygienic: smooth inside and outside, one machine with multiple functions, reduce pollution and lighten cleaning burden.
8. Wide range of applications: It can be adapted to materials with fibrous, high toughness, high hardness or a certain moisture content. For pollen and other spore plants and other materials that require cell wall breaking, the wall breaking rate is higher than 95%.
9. Improve the environment: The fully enclosed operation has no dust overflow and no slag generation, which can improve the working environment.
10. The safety of the ultra-fine grinder is strong: the parts in contact with the material are all polished stainless steel, and the material is the general material of international medicine and food machinery, avoiding heavy metals such as arsenic, cadmium, mercury, lead, and copper.
Technical characteristics of ultra-fine grinder and tips for daily maintenance
Ultra-fine grinders are now widely used in various industries. Next, we will learn about the technical characteristics of superfine grinders and the daily maintenance tips for superfine grinders.
[What are the characteristics of the current applied technology of the ultrafine grinder]
1. It is small and beautiful, light in weight, and can be moved arbitrarily; it has the characteristics of simple operation, no vibration, low noise, power saving and safety, etc., especially suitable for research institutes, laboratory sample analysis, etc.
2. Ultra-high-speed motor design, vibrating ultra-fine grinding machine for medicinal materials with high crushing fineness (most medicinal materials are crushed with a fineness of 50-300 mesh); wide grinding range: Panax notoginseng, Sanqi, frankincense, myrrh, donkey-hide gelatin, dodder, Hippocampus, astragalus, etc. can grind well.
3. The speed is fast, and the grinding time of the vibrating ultrafine grinding machine is generally no more than 3 minutes.
4. It is clean and hygienic, and does not raise dust when working. The grinding groove and blade of the vibrating ultra-fine grinder are made of stainless steel, which meets the iron-free requirements of many Chinese medicines.
5. There is basically no loss of materials, and the machine is easy to clean; grinding different medicines will never cross the color and smell.
6. The operation is simple, and the personnel do not need special training.
7. The structure is durable and economical. The blade is made of special steel, which is of the same quality as the razor, and there is no need to change the knife to crush 100-200kg pieces.
[Tips for daily maintenance of superfine grinder]
1. When the bearing oil temperature rises, you must stop immediately to check the cause of the fault and eliminate it.
2. Pay attention to the degree of wear of the parts that are easy to wear, pay attention to and prepare to replace the worn parts at any time.
3. For the surface of the bottom frame where the movable device is placed, it is necessary to remove dust and other debris to avoid the phenomenon that the movable bearing cannot move on the bottom frame when the machine encounters materials that cannot be crushed, which may lead to accidents.
4. The bearing that bears all the load of the machine is the bearing, so good lubrication has a great relationship with the service life of the bearing. It can directly affect the service life and operation rate of the machine. Therefore, the cleanliness of the injected lubricating oil must meet the standard and the seal is good.
5. The installed wheel tyres are prone to looseness and must be checked frequently.
6. Pay attention to whether the working conditions of each part of the machine are normal.
7. If the rotating gear is running, if there is an impact sound, it must be stopped in time for inspection and the malfunction should be eliminated.
Ultra-fine grinder operating instructions & output & fineness adjustment methods
Ultra-fine grinder is a kind of fine powder and ultra-fine powder grinding and processing equipment. This equipment is mainly suitable for non-flammable and explosive non-metallic materials with medium and low hardness, humidity less than 6%, and Mohs hardness below 9 .
- Operation instructions
(1) Turn on sequence ---- turn on the auxiliary equipment first (high-voltage extension, high square screen, pulse dust collector, wind shutoff, screw auger, scraper and hoist).
(2) Open the host supporting equipment (grading wheel, host, feeder). Remarks: Before turning on the feeder, the frequency of the grading wheel must be set first. The purpose is to prevent the grinding material from being too coarse or too fine.
- Fineness adjustment method
(1) Under normal working conditions, the factors that affect the fineness are the air volume, the speed of the grading wheel and the feeding volume, and the degree of wear of the wearing parts.
(2) When the fineness is too thick: if the air volume is the maximum, first reduce the feed volume, and then increase the frequency of the grading wheel; if it still does not meet the requirements, turn off the small air volume (butterfly valve on the high-pressure air pipe). Such repeated adjustments to find and meet the fineness requirements are the control points for the best yield.
(3) When the fineness is too fine: first increase the air volume, if the air volume is the largest, reduce the frequency of the grading wheel and increase the feeding volume after the current drops. Such repeated adjustments to find and meet the fineness requirements are the control points for the best yield.
(4) If low-grade feed is produced, the requirement for fineness is not high, and when only the output is pursued, the air volume should be maximized, the frequency of the grading wheel should be reduced, and the feed volume should be increased.
- Wearable parts and names that affect output and fineness
(1) Hammer: After the material enters the grinding chamber, the hammer is mainly used to make the material thinner. Severe wear of the hammer head will result in a decrease in output and fineness, uneven wear and increase in vibration, which will affect the service life of the main engine bearing.
(2) Ring gear: After being hit by the hammer, the material will bounce back to the ring gear, forming a second hit, and the crushing requirements can only be reached after repeated such repetition. The wear of the ring gear will greatly affect the output and fineness.
(3) Wear plate: Wear plate is the most easily worn object. Wear plate is an important part to protect the active disk. Excessive wear of the wear plate will increase the vibration and affect the service life of the main engine bearing. After being worn through, the active disc will be directly worn, which will increase the cost of accessories and cause the equipment to operate in a dangerous state.
(4) Shunt cover: After the shunt cover is worn, it will change the flow direction of the airflow in the crushing chamber, causing the fineness of the material to fail to meet the requirements.
(5) Active disk: The wear of the active disk (replacement of the wear plate in time will effectively protect the active disk) will cause vibration and affect the service life of the host bearing.
Preparation and inspection of the superfine grinder before use
Jet mills use high-speed airflow to perform ultra-fine grinding of materials. At present, there are five types in the industry, which can be divided into horizontal disc (flat) jet mills, circulating tube jet mills, target jet mills, reverse jet mills and fluidized bed jet mill. The ultra-fine grinder uses air separation, heavy pressure grinding, and shearing to achieve ultra-fine grinding of dry materials. It is composed of cylindrical grinding chamber, grinding wheel, grinding rail, fan, material collection system and so on.
The inspection items before preparation and use are as follows:
1. Check the grinder and grading system to check whether there are metal objects and debris in the grinding room;
2. Check whether there are metal objects and sundries in the feeding hopper and feeding screw of the superfine grinder;
3. Check whether the ultra-fine grinder tightens the fasteners;
4. Whether the elasticity of the transmission belt of the ultra-fine grinder is moderate, and whether the protective cover has been installed;
5. Check the collision of the transmission parts, if there is any abnormality, analyze the reason and eliminate it in time;
6. Turn the transmission parts to see if there is any abnormality, then move the parts to check whether the operation direction is correct;
7. Run the ultra-micro grinding machine without load for 20-30 minutes, and observe the working current, temperature and vibration: the temperature rise of the spindle bearing should not exceed 35℃, and the highest target temperature should not exceed 70℃ (in different environments, the temperature is generally not more than 40 ℃); The vibration amplitude of machinery and equipment should not be too large. It can be put into production after normal no-load operation;
8. The superfine grinding machine should properly open the upper and lower air doors of the gravity dust collector room.