Many people are “silly and unclear” about the sand making machine and crusher, and don’t know the relationship and difference between them, so they often get confused. Both sand making machines and crushers are crushing equipment, and both can crush mineral stones such as pebbles and limestone, but in fact they have certain differences. 1 different types Sand making machine, also known as impact crusher, in fact, sand making machine is also one of the types of crushers. There are many types of crushers: jaw crushers, cone crushers, heavy hammer crushers, impact crushers and mobile crushers. 2 different functions The sand making machine uses the principle of “stone-on-rock” crusher for processing. It is widely used in various hard and brittle materials such as various rocks, abrasives, refractory materials, cement clinker, quartz stone, iron ore, concrete aggregates, etc. Broken, finely crushed (sand making). It is suitable for construction sand and sand and gravel for road construction. The crusher is mainly used for crushing medium hardness and brittle materials, such as granite, river pebbles, pebbles, limestone, etc. 3 The order of use is different Crushers are generally used in stone production lines, and sand making machines are generally used in sand production lines and sand production lines. In the stone production line and sand production line, the crusher is used for the first stage of crushing, and the sand making machine is used for the second stage. If the lumpiness of the material is relatively small, it can also be directly used for the second stage of crushing. 4 Different feed size The feed size of the crusher is relatively large, and the diameter is generally about 1 to 2 meters, which can directly crush the large stones mined from the mountain. The feed particle size of the sand making machine is relatively small, generally controlled at about 20-30cm, and the feed particle size is also clearly specified, and cannot exceed the limit set by the equipment, otherwise the equipment will be easily damaged. 5 Different discharge sizes The particle size of the sand crushed by the crusher is usually controlled below 25mm, so that the sand making machine can perform the next sand making process, and the sand size after the sand making machine will be controlled within 5mm. After screening, select those suitable for construction Sand standard sand. In layman’s terms, the sand making machine is used to make sand, that is, the stone is made into sand; the crusher is to break large stones into stones. The difference between the two is mainly in the process technology and processing links. It plays different roles in the sand production line and is an indispensable common equipment.
With the limited mining of natural sand and gravel, municipal engineering is still in full swing, and there is an increasing demand for gravel in the market. Machine-made sand is becoming more and more people’s favorite. However, many customers don’t know how to operate the sand making machine in practice. Today, I will share with you the key points of the use of the sand making machine and the professional scientific name of the accessories. 1. The normal operating temperature of the bearing box of the sand making machine is 40℃~60℃, and the maximum allowable temperature is 70℃. After half an hour of operation, if the temperature exceeds 70℃, it indicates that there is a certain problem with the bearing box, and it should be shut down for maintenance in time. 2. When the sand making machine is running under load, the feeding particle size is not allowed to exceed the maximum particle size allowed by the equipment. 3. During the initial feeding of the sand making machine, there will usually be an unbalanced process of about 30~60s. In this case, the feeding cannot be stopped, and the feeding amount should be increased as much as possible until the vibration drops. When the feed particles are large, it will produce intermittent vibration, which will return to the normal state after a few seconds. This is due to the normal situation caused by the accumulation of materials and then being washed away after a certain throwing head of the rotor retains stones. nervous. 4. Vibration intensifies during the operation of the sand making machine, indicating that there may be uneven wear between the wear-resistant parts and the rotor, which is caused by the unbalanced state caused by the non-symmetrical rotor and the accumulation of materials, or the looseness of the cone sleeve of the pulley. . After the normal vibration is eliminated, the machine can be shut down for inspection. In addition, the vibration switch installed on the sand making machine can be set, and when it detects unbalanced vibration, it will take the initiative to shut down before equipment damage or personal injury occurs. 5. The rotor wear-resistant parts of the sand making machine are designed to protect the rotor body from abrasion. In order to ensure the trouble-free operation of the sand making machine, the inspection of the wear-resistant parts of the rotor and the internal material lining of the machine must be included in the routine, and the wear parts that cannot meet the requirements of a work shift should be replaced in time. Every 8-10 hours of operation of the equipment, check the interior and appearance of the rotor and sand making machine, and add grease to the bearing box. 6. Check the current of the sand making machine motor. If the motor current is too large and the motor is overloaded, the feeding amount should be reduced until the current value is normal.
In sand and gravel plants, you can often see impact crushers and hammer crushers, but it seems that more businesses choose impact crushers. What is the reason for this? There are certain differences between the impact crusher and the hammer crusher in terms of technical structure, working principle, processing materials, and maintenance costs. The editor of General Mining Machine will make a detailed comparison on this, let’s take a look at the advantages of the impact crusher over the hammer crusher! 1. Technical structure There are still some differences in the structure of impact crusher and hammer crusher. For the crushing cavity, the crushing cavity for counter-attack is relatively large, and the feed port is also relatively large. When the material enters the crushing cavity where the impact is broken from the feed port, the material is not only impacted by the hammer, but also repeated impact between the material and the impact plate, and between the material and the material, so the crushing effect is more sufficient. Better realize the production of bulk materials. In comparison, the crushing cavity of the hammer crusher is smaller, and the sealing performance is better than that of the impact crusher. When the material is crushed and processed, it will produce less dust pollution, which has the advantage of environmental protection. 2. Working principle There is a big difference between impact crusher and hammer crusher when crushing materials, which is caused by the difference of the plate hammer. Inside the impact crusher, the plate hammer greets the material from bottom to top to crush the material, and throws the material onto the upper impact plate, while the hammer crusher strikes and crushes the material in the direction in which it falls. , In the counterattack, the rotor rotates clockwise, and the blower faces the material from bottom to top, while in the hammer, the rotor rotates counterclockwise, and the hammer head strikes in the direction in which the material falls. Both counterattack crushing and hammer crushing can realize the adjustment of the particle size of the finished product. Because the impact crusher has no grate sieve at its lower part, the adjustment of the product particle size is mainly controlled by adjusting the rotor speed or rotor diameter, adjusting the size of the distributor opening, and adjusting the gap of the grinding chamber. For the hammer crusher, the adjustment of the particle size of the finished product can be controlled by adjusting the size of the sieve plate gap. According to this situation, the impact crusher can more effectively process materials with large water content and avoid Clogging situation. 3. Handling materials Because of the difference in technical structure and working principle, the impact crusher can not only handle softer materials, but also harder materials, while the hammer crusher can only handle materials with lower hardness. Because there is no grate bar at the bottom of the impact crusher, the product size is determined by the gap between the impact plate and the hammer head, so when the water content of the processed material is too large, it can effectively avoid the phenomenon of blocking the grate bar when crushing wet materials. The hammer crusher increases the possibility of clogging due to the factor of the bottom grate, so it cannot handle materials with high humidity. In comparison, the working range of the impact crusher is wider. 4. Maintenance cost In the early purchase, the price of counterattack is generally higher than the price of hammer. However, due to the difference in structure and work between impact crusher and hammer crusher, there will be certain differences in later maintenance. The wear of the impact crusher plate hammer only appears on the side facing the material, and the metal utilization rate of the impact crusher plate hammer can be as high as 45%-48%. At the same time, the impact crusher frame part is a three-part structure, only need to open the rear casing of the crusher, you can replace the hammer, impact plate, liner and other maintenance operations, and the impact of the crusher parts The interchangeability is strong, and the variety of wearing parts is small, which is convenient for the procurement and management of spare parts. The hammer crusher has more than 100 hammer heads. It takes a lot of time and manpower to replace a set of hammer heads, and the cost of overhaul and maintenance is relatively high. The broken rotor, bottom screen, grille, etc. may also be worn during work, and replacement is relatively complicated. Through the above comparison, it can be known that if the material processed by the sand and gravel plant is harder or softer, the impact crusher is more inclined. On the contrary, the hammer crusher is selected. At the same time, it can also reduce the later operating cost of the equipment and improve its economy. benefit. In actual production, some merchants may choose hammer crushers due to different jobs, and the specific situation needs to be communicated with the merchant in detail.
During the use of the crusher, maintenance operations are indispensable, which can greatly extend the service life of the crusher and ensure their working efficiency; one of the key items is the maintenance of the hydraulic system. The following explains why you should It is maintained, how to maintain the answer. There are three basic “pathogenic” factors in hydraulic systems: pollution, overheating, and ingress of air. Practice has proved that 75% of the failures of the hydraulic system are caused by these three. So how to keep the hydraulic system away from these three “pathogenic” factors and keep healthy? The secret lies in scientific and effective maintenance operations. Please follow the editor to experience the “maintenance gymnastics” of this hydraulic system: Part 1: Regularly replace the filter element When the hydraulic system is working, the fuel tank will exchange air with the outside atmosphere, and the friction between the moving parts in the system will produce small solid pollutants. Therefore, when the hydraulic system is running, the filter is always working; once the dirt holding capacity of the filter element reaches the limit and we do not replace it in time, these dangerous pollutants will produce destructive power and make your hydraulic system “sick” . Part 2: Regularly check whether the heat exchange unit is working properly The hydraulic system is like a “long-distance runner” when it runs. If there is a problem with its heat exchange system, it cannot “sweat” to lose heat and maintain temperature balance, then its “running” must stop. Regardless of whether the heat exchange unit is water-cooled or air-cooled, a clean and matched heat exchange medium must be used, otherwise the heat exchange unit itself cannot work stably for a long time. Of course, the hydraulic system it serves has to stop to calm down. Part 3: Regular exhaust Many people seriously underestimate the harmfulness of air in hydraulic systems. If the proportion of air in the oil is too high, “cavitation” and “cavitation” will occur when passing through the hydraulic pump, which will damage the hydraulic pump and produce metal particles. A large number of metal particles are catastrophic to the hydraulic system. It may directly make the hydraulic system “end of life”. For the hydraulic system exhaust, you may not know how to operate it. Conscience editor’s friendship sharing: The air dissolved in the oil in the fuel tank can be heated to 60°C and let it stand overnight; during this process, you will find that a large number of bubbles slowly emerge from the liquid surface and dissipate. . The pressure measuring joint at the height of the hydraulic system can also be used as an exhaust point, but this type of operation must be performed by professionals, and safety is the first priority. Part 4: Regular pipe tightening and surface cleaning This type of maintenance operation is actually common to mechanical parts, which helps prevent oil leakage and early detection of problems.
There are many types of stone crushers, such as jaw crushing, counterattack crushing, cone crushing, impact crushing, hammer crushing, roller crushing and so on. Although these crushers are all stone crushing equipment, their working principles and crushing methods are different, so their positions in the entire crushing process are also different. Today, Xiaokuang will give you a summary of the crushing methods of commonly used crushers. The first type: curved extrusion type, representing jaw crusher Jaw breaker is a motor driven belt and pulley, which makes the movable jaw move up and down through an eccentric shaft. Its crushing method is a bit similar to chewing on the upper and lower jaws. When the movable jaw rises, the angle between the toggle plate and the movable jaw becomes larger, which pushes the movable jaw plate closer to the fixed jaw plate. Purpose; When the movable jaw descends, the angle between the toggle plate and the movable jaw becomes smaller, and the movable jaw plate leaves the fixed jaw plate under the action of the pull rod and the spring. At this time, the crushed materials are discharged from the lower mouth of the crushing cavity. The second type: laminated crushing type, representing cone crushing The cone crusher is driven by the motor to drive the belt pulley or coupling, so that the drive shaft drives the eccentric sleeve to make a rotary motion. The crushing wall of the cone crusher is close to and away from the wall of the rolling mortar from time to time, so that the ore is continuously impacted, squeezed and bent between the two to achieve crushing. The third type: impact crushing type, which represents counterattack and hammer crushing The impact crushing mainly uses the blow and crushing of the plate hammer. For example, counterattack. Driven by the motor, the rotor rotates at a high speed. When the material enters the action area of the blower, it is hit and crushed by the blower on the rotor, then thrown out, and then continue to be beaten and crushed. Through continuous beating and crushing, the material is slowly broken into the required particle size and discharged from the discharge port.
Regularly check the degree of wear of the hammer head, hammer shaft, liner and other wear parts. If they are worn, they should be replaced in time to avoid damage to the casing or rotor disk. The method of defining the wear of the broken surface of the hammer: In order to prolong the service life of the hammer, when the front edge of the hammer does not reach the center line of the bottom of the hammer, it should be turned over in time to increase the usage rate of the hammer. The inspection method of wear is as follows The balance of the rotor must be ensured when the hammer head is replaced, and the total weight of the hammer head on each hammer shaft is equal to the total weight of the hammer head on the symmetrical hammer shaft, and the total deviation must not exceed 500 grams. The bearing is a vulnerable part of the crusher, because it wears a lot during use, so it needs regular maintenance. Regularly check the bearing temperature. Under normal working conditions, the bearing temperature rise should be within the range of 40 degrees, and the bearing temperature should not exceed 75 degrees. If it exceeds 75 degrees, the machine should be shut down in time to find out the cause and eliminate it. When replacing the bearing, be sure to install the bearing in place. Heat the bearing evenly to about 100 degrees, and quickly install the bearing on the bearing platform, so that the outer side of the bearing inner sleeve is evenly combined with the bearing shoulder of the main shaft. Regularly check the rotor disc for wear. For the rotor disk with wear-resistant edge protection, check whether the rotor disk edge is loose or damaged to avoid wear of the rotor disk; for the rotor disk using wear-resistant electrode surfacing, check whether the wear-resistant welding block of the rotor disk needs surfacing. It is recommended to check each shift. When replacing the rotor, first loosen the bolts at the bottom of the bearing seat, place the bearings at both ends of the rotor in the two bearing seats, use a square ruler to measure the distance between the two ends of the rotor and the inside of the casing, and adjust the distance so that the distance between the two ends is consistent. Then adjust the position of the bearing and the bearing seat, and finally tighten the bearing base bolts. The installation direction of the rotor is that the positive wire is installed on the left side facing the inlet, and the reverse wire is installed on the right side facing the inlet.
Correctly handle the relationship between use, repair and maintenance, to ensure that the crusher is always in good condition, each assembly, components, etc. have good working performance, reduce downtime, so as to ensure continuous and effective production, to achieve increased productivity, The ultimate goal of reducing cost input. The daily maintenance of the crusher includes cleaning the equipment, checking the tightness of the fasteners, maintaining good lubrication, adjusting mechanical parts and so on. details as follows: 1. The crusher can be put into production after normal operation. 2. The material must be fed evenly to prevent uneven motor load. 3. Check the discharging granularity. If the discharging granularity is found to be larger, the distance between the hammer head and the adjustment liner should be adjusted. 4. If a sudden increase in the vibration of the crusher is found, it should be shut down in time for inspection and eliminated. 5. Before stopping the machine, stop feeding materials to ensure that the material in the crushing chamber is completely broken before stopping the machine. 6. Make repairs, inspections and maintenance records and keep them properly so that you can analyze the cause in the event of a failure.
During the operation of the stone crusher, the discharge port and other parts are easy to be blocked by the material. If you do not pay attention, the loss problem will occur. If you want to ensure its normal operation, regular cleaning is the key. 1. Machine cleaning The stone crusher adopts machine cleaning methods including ultrasonic cleaning and vibration cleaning. These two cleaning methods mainly simulate manual cleaning. Ultrasonic cleaning does not need to disassemble the parts, but directly uses the ultrasonic signal to align the parts that need to be cleaned. Vibration cleaning requires disassembling the cleaned parts and putting them into the washing machine for cleaning. 2. Manual cleaning Manual cleaning of stone crusher parts is more environmentally friendly and easy to clean. For manual cleaning of accessories, first, the parts that should be cleaned need to be disassembled, and then the water in the cleaning tank is heated to about 80 degrees Celsius, and diesel or kerosene is added for soaking. After the water temperature in the cleaning tank is lowered to human body temperature, the staff can use the cleaning brush. Brush off the dust or debris in the accessories of the stone crusher, after scrubbing clean, dry it with cotton gauze.
Recently, many friends left messages asking how to install a certain type of crushing equipment or screening equipment, or how to install a certain part. For large-scale grinding equipment, the editor does not recommend to assemble or repair on the basis of not understanding. In place, small details may cause major problems in production, so it is best to contact professional equipment personnel to operate. However, if you want to have a certain understanding of the structure and installation of the equipment, the editor is happy to communicate with you. This article takes the revolving crushing as an example to introduce the installation steps and precautions of the 5 parts of the lower frame, transmission part, eccentric shaft sleeve part, middle frame, crushing cone part and beam. 1. Installation of the lower rack The installation of the lower rack is the basis for equipment installation. Install the lower rack on the foundation first, and the equipment must be consistent with the foundation during installation. A gap of not less than 30mm should be kept between the base of the lower frame and the foundation due to secondary grouting. Tighten the anchor bolts after the second grouting to ensure the stability of the equipment. 2. Installation of the transmission part The installation of the transmission part is related to the operation of the equipment. Therefore, when installing, it must be noted that the centers of the two copper sleeves must always be kept at the same horizontal line without deviation. The radial gap between the copper sleeve and the shaft must be strictly in accordance with the instructions of the equipment manual. Within a certain range. When installing the drive shaft, it is necessary to add an appropriate amount of gaskets between the flange of the drive housing and the frame to adjust the position of the bevel gear to meet the product design requirements. 3. Installation of eccentric shaft sleeve Special attention should be paid to the installation process to protect the smoothness and integrity of the friction surface of the babbitt alloy layer. Check whether the tooth tip clearance meets the requirements after installation, and correct it in time if any abnormality is found. The size of the gap can be adjusted by changing the number of adjustment shims. 4. Installation of the middle rack The installation of the middle frame needs to be calibrated through the upper flange of the lower frame. Before installation, it is necessary to make sure that the gap between the flanges of all the taper surfaces is equal, and the error should be less than 0.5mm. The gap between the upper and lower joint surfaces is generally about 15 mm. When installing, make sure that the pins are tightened. After the machine has been running for a period of time, tighten the pins one by one to make all the pins on the circumference evenly stressed, strengthen their stability, and ensure the normal operation of the equipment. 5. Installation of crushing cone and beam Two ways: (1) The crushing cone is installed separately Use the lifting ring on the shaft to hoist the crushing cone into the frame, and then place wooden pads on the ribs on the lower part of the frame to support the cone, then install the beam, and install the nut and jacket on the upper end of the spindle, and finally install the cap , Then take out the wooden mat and wooden wedges. (2) The crushing cone is installed together with the beam That is, the beam and the crushing cone are installed in a special pit in advance, and then installed in the frame together. When lifting the crushed cone and beam components, pay attention to the hoisting method. Wire ropes must be used to hang on the beam of the beam to prevent accidents during the hoisting process. The crushing wall of the crushing cone must be pressed tightly to prevent loosening. Before pressing, apply dry oil to the lower space of the fixed ring (pressing plate) and the anastomotic bolts to prevent rust or corrosion and affect the life of the equipment.
1. When the hardness of the material is higher, the hardness requirement of the hammer material is also higher, and the larger the material is, the higher the toughness requirement is. Therefore, the choice of hammer material should be paid attention to. Which requirement is more important for the fragmentation and hardness of the crushed material. 2. The larger the size of the crusher, the heavier the weight of the hammer, the greater the size of the crushed material, and the greater the impact load on the hammer. Therefore, when choosing the material of the hammer head, the toughness of the hammer head should be guaranteed first, and then how to increase the hardness of the hammer head should be considered on the premise of ensuring the toughness of the hammer head. 3. In addition to the above two points, there is another very important point, which is to comprehensively consider the rationality of the process, and consider the cost-effectiveness of the product, as well as the market acceptance, use effect, etc.