At present, the most widely used jaw crusher is only two types: the crank-cranked rocker with a simple swinging crankshaft, and the crank-rocker jaw crusher with a complex swing. Most of the simple pendulum crushers are made into large and medium-sized ones, and the crushing ratio is generally 3-6; the compound pendulum crusher is generally made of small and medium-sized, and its crushing ratio can reach 10. According to the size of the width B of the feeding port and the length L. Jaw crushers are divided into three categories: large, medium and small. The width of the ore mouth is greater than 600 mm; the width of the ore is 300 mm to 600 mm; the size is less than 300 mm. The simple pendulum type is more than 900×1200 for coarse crushing. The maximum size of the foreign simple pendulum crusher is 2100×3000 mm. Although the simple pendulum crusher can be enlarged compared with the compound pendulum crusher, its disadvantage is that it is difficult to maintain. The compound pendulum crusher is widely used, and is now manufactured in large, medium and small sizes. The maximum size of the compound pendulum type is 1500×2100 mm. Compared with the simple pendulum type crusher, the compound pendulum crusher has a productivity higher than that of the simple pendulum type, and the maintenance and operation are simpler than the simple pendulum type. 1200×1500 simple pendulum crusher working principle The crushing work of the jaw crusher on the material is carried out between the two jaws. The transmission mechanism drives the movable jaw to surround the suspension shaft, and periodically reciprocates relative to the fixed jaw, and sometimes approaches and sometimes leaves. During the process of the movable jaw being close to the fixed jaw, the material between the two jaws is crushed, bent and split, and the broken ore is under gravity when the moving jaw leaves the fixed jaw. , discharged through the discharge port. Jaw crusher construction The jaw crusher consists of a frame, a crushing plate, a movable jaw, a mandrel, a flywheel, an eccentric shaft, a connecting rod, a spring, a thrust plate, etc., and is divided into: according to the function of its components: 1. The work of crushing ore Institutions, 2. Action mechanisms for moving movements, 3. Overloaded insurance institutions. 4, the adjustment device of the discharge port, 5, the frame support device. Working Organization It consists of a crushing cavity composed of a fixed jaw and a movable jaw. The fixed jaw is located at the front of the body, and the movable jaw is suspended on the mandrel, and the mandrel is supported by the bearing and supported on the frame. The fixed jaw is fastened to the frame by bolts, and the lower end is also supported on the boss of the frame body, the upper end is pressed by the steel plate pressing block, and the lower end of the movable jaw plate is supported on the boss of the lower end of the movable body. The upper end is pressed with a wedge and padded with a plastic material between the crushing plate and the frame. The wear of the broken tooth plate is uneven. Usually, the wearer is slower near the ore supply, and the wearer is close to the discharge port, especially the lower end of the fixed slab. To extend the service life of the sprocket, the sprocket is often symmetrical upwards and upwards. use. Second, the movable jaw action mechanism It is composed of a flywheel, an eccentric shaft, a connecting rod, a front and rear thrust plate, etc.; the two ends of the eccentric shaft are respectively provided with a pulley and a flywheel, which are supported in the main bearing of the side wall of the main frame, and are connected on the main bearing (Plasts bearing) The head is bolted to the eccentric shaft, and a slider (or a support pad) is arranged in the groove on both sides of the lower end of the connecting rod, and one end of the front and rear thrust plates is respectively supported on the slider, and the other end is respectively supported In the bracket support of the lower part of the movable jaw, the jaw crusher is intermittently operated, that is, when the movable jaw is pressed by the thrust plate and close to the fixed jaw, the ore in the crushing chamber is broken, For work trips. When the movable jaw leaves the fixed jaw, no crushing action occurs. At this time, the crushed ore in the past is discharged by gravity to the crushing chamber, so it is called an idle stroke. Therefore, the load of the jaw crusher is extremely unbalanced. In order to adjust the uniformity of the load, the energy of the idle stroke should be stored, and then released during the working stroke, so the pulley and the flywheel are eccentric. The eccentric shaft is also called the main shaft, and the suspended shaft is also called the mandrel. The eccentric shaft is the main component that drives the connecting rod to reciprocate up and down. The thrust plate is also called the bracket, which is the part that transmits the movement to the movable raft, and The safety device of the jaw crusher. Third, the adjustment device: It is the adjustment mechanism of the discharge port, which is adjusted by the gasket; a set of gaskets with different thicknesses is placed between the jaw crusher thrust plate support and the rear wall of the frame, by increasing or decreasing the number of gaskets. Make the discharge port adjusted. Fourth, the safety device Is to prevent the non-broken material into the crushing chamber (refer to the processes of the spare parts in steel, wood, etc.) damage to the machine part provided security facility. Fifth, the support device Mainly refers to the bearing portion, the dynamic pressure machine Pap alloy sliding bearings, bearing on the frame and on the cast rod body. Sixth, lubrication system The jaw crusher is lubricated with thin oil and uses KH934 lubrication station to supply main bearing and connecting rod lubrication. The lubricating oil is made of No. 40 mechanical oil or No. 50 mechanical oil. The lubrication system mainly includes fuel tank, oil pump, motor, filter and cooling. And a piping system with a measuring pressure and temperature meter. Technical performance of the machine Equipment opening and closing work First, the equipment inspection before starting Hand over the shift according to the regulations, confirm whether the host has the transfer conditions Check if the oil level of the lubrication station is suitable and the cooling water is unblocked Check whether there are large ore and debris in the crushing chamber, whether the tooth plate and the side guard are intact, whether the front and rear thrust plates are intact, whether there are cracks, and whether the spring pull rod is intact. Check whether the transmission belt is intact, whether the tension is appropriate, whether the motor wiring, operation box and instruments are intact, whether the voltage is within the specified range, and whether the safety cover and safety protection device are complete. Whether the connecting bolts of each part are tightly fastened and the anchor bolts are tightly fastened. Second, the boot and equipment operation check 1. Replace the operation card and place it in a fixed position; 2. Turn on the lubricating oil pump (the oil tank heating device should be turned on before the oil pump is turned on in winter to make the oil temperature reach 20 °C). After about 2-3 minutes after starting, check (1) whether the oil pump running sound is normal, (2) oil Whether the pressure is within the allowable range (0.078-0.14MPa) (3) Whether the pressure difference before and after oil filtration meets the requirements (0.02-0.04 MPa) (4) Whether there is oil at each lubrication point, whether the lubrication pipe is leaking or blocked, back Is the oil normal? 3. Start the dust removal equipment and wait for the dust removal equipment to run for 3-5 minutes to confirm whether the dust removal equipment is operating normally. 4. When the host starts, check if there is any work around the body and use the ringtone to prompt. 5. After the host starts, check the following parts: (1) The starting current and no-load current of the host, with or without abnormal noise; (2) Whether the main motor running sound is normal; (3) Whether the working mechanism of the crusher is normal and whether there is abnormal noise; (4) Check the bearing and other running (or active) parts of each part for abnormal noise; (5) Observe whether the oil flow and oil pressure meet the requirements. 6. When the host is started, confirm that the equipment is running normally, and the load can be loaded. 7. Check the equipment once every half an hour, whether the bearing temperature, oil pressure, current and voltage are normal or not. 8. Stop feeding or shut down immediately when the following conditions are found: (1) When the bearing temperature exceeds 60 °C, the oil pressure of the lubricating oil is abnormal, or when the oil is suddenly cut off; (2) The motor or the host has an abnormal sound; (3) The pulley rotates and the movable oscillating amplitude suddenly becomes smaller (the thrust plate breaks) (4) The pulley belt is slipping (there is a large or non-crushed material in the crushing chamber) Third, stop When the crusher is shut down, it must first stop the ore (stopping plate) after the ore in the crushing chamber is completely broken. Stop the motor, stop the oil pump, stop the dust removal equipment, turn off the cooling water, and turn off the power supply after a long time stop. First, the rear thrust plate (bent plate) replacement 1. Loosen the spring pull rod bolt first, and use the manual hoist to pull the movable shovel to the fixed shovel to fix it to about 120mm. At the same time, use the jack to move the connecting rod and the front thrust plate forward and fix. 2. Take out the adjustment pad; 3. Remove the broken thrust plate and check whether the semicircular chute of the thrust plate support seat is damaged; 4. Remove the elbow joint bolts of the thrust plate and remove the elbows on both ends of the thrust plate; 5. Install the thrust plate, add the pad to adjust the discharge port to the open side 150±40, fasten the spring tie rod, and take out the chain hoist and jack. Second, the transmission adjustment 1. The axes of the two pulleys are parallel to each other. The center line of the V-belt is on a center line. If the two pulleys and the groove are not on one center line, the V-belt will have a phenomenon of flanging and dropping. 2, the tension of the V-belt should be appropriate, the tightening of the V-belt will affect the service life of the V-belt and the motor bearing and the sliding bearing; if the V-belt is too loose, the V-belt will slip, resulting in a reduction in the speed of the passive pulley and power loss. The number of revolutions and crushing force of the crusher are reduced, which is easy to cause the crushing chamber to mine. Third, the working organization 1. Check the movable raft and the fixed raft, and the side Guard wear and fastening. If the tooth plate, movable lining and side Guard are worn more than 2/3 of the original thickness, or obvious pit cracks appear. Such phenomena should be replaced in time. Check whether the pressure plate and the movable jaw wedge of the fixed jaw are tight and the bolts are tight. 2. Measure whether the discharge port meets the requirements. As the tooth plate is gradually worn, the discharge port is also gradually increased. 3. Check whether the bolts of each part are damaged or not, because the load of the crusher is not balanced, so the bolts are easy to loosen. 4. Check the temperature of each bearing for obvious changes and whether the lubricating oil leaks. The rolling bearing opens the bearing cap every three months and adds oil once. 4. Inspection and maintenance of eccentric shaft and babbitt alloy tile The eccentric shaft, also called the main drive shaft, is the main component that drives the connecting rod to transmit power. Therefore, the spindle must be monitored and maintained. If the eccentric shaft of the babbitt tile is broken, it may burn in 2-3 minutes, causing the entire system to stop production. The operation post checks the lubrication system once every half hour, whether the oil pressure is normal, whether there is leakage, and whether the temperature is normal. Under normal circumstances, open the tile cover for two years to check the wear of the babbitt tile, use a scraper to break open the sheet, and inspect and measure the mouth. Whether the tile roof clearance meets the technical requirements. Five, lubrication system 1. Check the gear oil pump once a month, whether the oil pressure is normal; 2. Clean the filter screen every month to ensure that the oil pressure is clean and the pressure difference after filtration is not more than the specified value (0.02-0.04MPa); 3. Filter the lubricating oil once every three months, change the oil for half a year, and clean the fuel tank every time you clean or change the oil; 4. Remove the lubricating oil pipe from the lubricating oil pipeline 1-2 times a year. 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Maintenance and maintenance of this equipment
I. Overview