Jaw Crusher is a kind of mining equipment used for primary and secondary crushing. It is widely used in medium-sized crushing of various ores and bulk materials in mining, smelting, building materials, highway, railway, water conservancy, and chemical industries. It has a wide variety and a wide range of uses, making it the perfect choice for mining and quarrying.
Of course, for the customers, in addition to the brand and quality of jaw crusher, the installation and use methods also make them particularly concerned. In order to meet the needs of users and help them solve the most concerned issues, we will talk about how to install and use it next.
From its basic structure, we can easily see that its structure is complicated with many parts. Therefore, during the installation, the user should pay more attention to it and must be installed under the guidance of the manufacturer's technical personnel and in conjunction with the installation and use instructions of the equipment. Pay more attention to the details to ensure that nothing is lost.
Since the working area of the jaw crusher is mostly mountainous, it is necessary to thoroughly investigate whether the topography of the mine is suitable for concrete piling before installation, and according to the site topographic conditions, foundation soil conditions, pile arrangement, and length, and pile frame factors such as ease of movement determine the piling order, and it should also be considered that the depth of the piles should be basically the same, and the foundation soil is even and tight.
The jaw crusher is mainly installed on the concrete foundation. Therefore, the stability of the foundation will affect the stability of the machine. If the foundation is stable, the vibration will be less during the production process, and the equipment can stably run. If not, the jaw crusher will easily generate loud noise and vibration when it is working, which not only affects the production process but also causes the equipment to break away from the foundation. It will have a bad influence on service life, and more importantly, cause personal safety hazards for workers, so the pouring of the foundation is very important.
The jaw crusher is installed on the concrete foundation. In order to reduce vibration and hum, a layer of hardwood, rubber or other vibration-absorptive material should be placed between the frame and the concrete. The horizontal and vertical levels of the frame mounted on the wooden base shall be in accordance with the requirements, and the backing between the frame foot and the soil shall be flat, uniform and stable. Before installing, the sliding bearing is researched and placed and then placed in the bearing housing. The horizontal value and the eccentricity deviation value are measured by the level meter. If the inner diameter is within the allowable range, the eccentric shaft can be placed on the bearing.
Before the shaft and bearing assembly, the sliding bearing needs to be researched and then placed in the sliding bearing housing, and the horizontality and coaxiality of the placement are detected by the level meter. If the measurement result meets the requirements, then install the eccentric shaft on the bearing and check the fit between the shaft and the bearing by applying red dan powder on the journal.
If the surface of the plain bearing is too high, further scraping is required until the high point between the contact surfaces disappears. Finally, a certain amount of lubricating oil is applied between the bearing housing and the bearing to reduce shaft wear. The contact area between the eccentric shaft sliding and the frame should be no less than 80%, and the gap between them should be less than 0.07 mm.
The rod bolt should be assembled after the main bearing and the eccentric shaft are ground. Before assembly, check it carefully, and then use the crane to place the rod bolt slightly lower than its normal position in the crusher. Wash the upper and lower bearings of the rod bolt and lubricate them with thin oil, and then install the bearing, main shaft, upper bearing, and upper shell. Lifting the rod bolt, then install the bolts and tighten them. The bracket should be added when the oil leakage occurs due to poor fitting. When conditions permit, it is best to assemble the complete set of rod bolts and main shaft outside and load them into the frame once with the crane.
The smash or installation of toggle plate can be removed by loosening the tension spring nut, removing the spring, and then using a chain or a wire rope to tie the lower part of the movable jaw plate, and then pulling the wire rope with the driving, so that the movable jaw is close to the fixed jaw, and the rear toggle plate automatically drop off, just inverted repeat the above steps in the installation.
The movable jaw plate is assembled by using the pre-assembled parts, that is, the movable jaws, the movable shaft, the movable dental plate, and the bracket are assembled in advance, and then hoisted in the frame by a crane. The sliding bearing is first ground and placed in the frame bearing housing to measure the deviation of the slope and the coaxiality. Then apply oil to the bearing and journal surfaces and place the movable jaw in the bearing.
The dental plate is the fastest worn part of the crusher and requires frequent replacement. The dental plate is fixed on the front wall and the movable jaw by bolts or wedges. The contact surface must be straight, and no lifting phenomenon is allowed. Otherwise, it should be solved in time. Since the inside of the front wall of the frame is not machined, it is better to lay a layer of the soft metal gasket between the back of the fixed dental plate and the forearm of the frame to ensure that the two are closely fitted.
The above is the installation method for the parts of the jaw crusher. However, in order to make the equipment run stably and maximize the benefits for the user, in addition to the correct installation of the jaw crusher, the rational use is also crucial, which is related to whether the assembled jaw crusher will run in long-term stable production and create a constant value for customers.
Before the jaw crusher is started, the equipment must be thoroughly inspected, for example, to check if the connecting bolts are loose; whether the protective cover of the pulley and the flywheel is intact; whether the tension of the V-belt and the tension spring is appropriate; whetherallthe oil is filled; whether the lubrication system is integrated; whether the electrical equipment and signal system are normal, etc. In addition, before starting the crusher, the oil pump motor and cooling system should be started first. After 3-4 minutes, when the oil pressure and flow indicator are normal, the motor of the crusher can be started.
During operation, attention must be paid to increase ore uniformly, and the ore is not allowed to be filled with crushing chambers. The maximum size of the ore should not be greater than 0.85 times the width of the ore. At the same time, the non-crushing objects such as the shovel teeth of the shovel and the drill bits of the rig are strictly prevented from entering the crusher. Once it is found that these non-broken objects enter the crushing chamber and pass through the discharge port of the machine, the relevant personnel should be immediately notified to take them out in time to avoid entering the next section of the crusher, causing serious equipment accidents;
During the operation, you should always pay attention to prevent the large nuggets from getting stuck in the feeding port of the crusher. If it happens, be sure to use iron hooks to turn the ore; if it needs to be taken out of the crushing chamber, special equipment should be used. It is strictly forbidden to carry out these tasks by hand;
If the crushing chamber is blocked, the ore should be suspended. After the ore in the crushing chamber is broken, the ore can continue to be fed, but the crusher is not allowed to stop running at this time;
Regular inspections should be taken to observe the working conditions and bearing temperatures of the various components of the crusher by means of viewing, listening, and touching. Usually, the bearing temperature must not exceed 60 to prevent the alloy bush from melting or being burnt tile accident. When it is found that the bearing temperature is very high, do not stop the operation immediately. Effective measures should be taken to reduce the bearing temperature in time, such as increasing the oil supply, forced ventilation or water cooling. After the bearing temperature drops, it can be stopped for inspection and troubleshooting;
When the crusher stops, it must be stopped in the order of the production process. First of all, it is necessary to stop feeding the mine. After the ore in the crushing chamber is completely discharged, the crusher and the belt conveyor should be stopped, and then is the motor of the oil pump. It should also be noted that the crusher suddenly stops for some reasons. Before the accident is processed and ready to drive, the accumulated ore in the crushing chamber must be removed. The installation of the jaw crusher and the method of use directly affects the quality of the finished product and the smooth progress of production. Mastering the correct installation and use of the jaw crusher is an effective guarantee for improving the efficiency of crushing work and product quality.
Jaw crushers are widely used in mining smelting, building materials, roads, railways, water conservancy, and chemical industries. There will be a strong vibration in the work, because of the large hardness of crusher materials. Therefore, the work of the installation of a jaw crusher is very important. This article describes the installation points and matters need the attention of 6 jaw crusher parts.
The installation of the crusher frame should be pad something that reduces vibration between the frame and concrete. Such as hardwood, rubber, etc. The horizontal and vertical levelness of the frame-mounted on a foundation or on a wooden base shall be in accordance with the installation requirements of the equipment. When installing the frame, the horizontal and vertical levelness of the frame on the foundation shall be less than 0.2 mm.
Before assembling the shaft and bearing, it is necessary to make good lapping of the sliding bearing. Then put it into the sliding bearing housing. Testing its placement of the level and coaxially through the gradient machine. If the measurement results meet the requirements, then install the eccentric shaft on the bearing. And check the fit between the shaft and the bearing via the red powder which applied to the journal.
Because it needs to use the principle of thermal expansion and cold contraction during install the bearing. So the heating process must be strictly controlled. Selects the suitable temperature to heat for should be selected for different specifications and sizes of bearings. The bearings of jaw crushers are large size bearing. It will cause the assembly quality to decline if uneven heating. Therefore, we choose to reheat the other side by turning the bearing direction 180 to ensure the even heating of the bearing.
It is required to strike the bearing diagonally during assembly. It makes sure that the bearings balance into the eccentric shaft. When the eccentric shaft enters the movable jaw, we need to strike the jaw with a hammer. The eccentric shaft is loaded into the moving jaw by using the interaction force without damaging the bearing on the eccentric shaft.
The grease is injected into the movable jaw by a butter oil injector. The Grease added into the bearing is about 50% of its space capacity and is changed every 3-6 months. When the oil change, the raceway of the roller bearing should be cleaned with clean gasoline or kerosene. So that the bearing lubrication is fully uniform, bearing in heavy load, the high temperature under the role of a good lubrication. It extends the service life of the broken bearing.
If there are too many high points on the surface of the sliding bearing. It needs to be scraped which until the high points between the contact surfaces disappear. Some lubricating oil is applied between the housing and the bearing to reduce the wear of the shaft. The contact area between the eccentric shaft and the frame shall not be less than 80%. The clearance shall be less than 0.07 mm.
After the above parts are installed in place, the connecting rod can be installed. Before the connecting rod is assembled, the position of the connecting rod and the required assembly should be carefully checked. After no problems are found, the connecting rod can be lifted and the whole connecting rod can be cleaned with gasoline or kerosene. After cleaning, apply a layer of oil to the connecting rod surface to ensure its installation lubrication. Then the upper bearing, the main shaft, the upper bearing and the connecting rod upper shell are lifted. The connecting rod is then lifted, and the connecting rod bolts are installed on the connecting rod and tightened. The gaskets shall be machined or new gaskets shall be retrofitted. If conditions permit, it may be lifted into the frame by means of a crane after the connecting rod and spindle parts have been externally assembled.
Release the spring nut, remove the spring, use the chain or wire rope in the lower part of the movable jaw. Then pull the wire rope, the movable jaw close to the fixed jaw, the elbow plate will automatically fall at the same time. After the old bracket is removed, the new bracket is pulled into the bracket by a wire rope. After that, the bracket is in close contact with the bracket seat. A pull rod and a spring are installed. The bracket is then supported in the bracket seat, and a trolley is used to pull the wire rope. So that the movable jaw is close to the fixed jaw. After the elbow plate will automatically fall off, installation, just the above steps can be repeated in reverse.
The movable jaw of the jaw crusher is assembled by preassembled movable jaw parts. First, Assemble the movable jaw parts accordingly. The movable jaw, movable jaw shaft, movable tooth plate, and bracket pad are assembled on the ground. Then use the crane lifts the assembled parts into the rack of the crusher.
For the sliding bearing which needs to install it. Then put into the housing, measuring its inclination and coaxiality of the deviation. If it within the allowable range, the bearing and journal surfaces are coated with lubricating oil. The movable jaw is placed in the bearing, and the coaxiality and inclination of the assembly of the sliding bearing are tested. The inclination is guaranteed to be 0.2 mm, and the coaxiality is less than 0.06 mm. The installation of the movable jaw is completed.
Jaw crusher tooth plate is directly used for crushing ore parts. Its structure is simple, but because of frequent contact with the ore, tooth plate is the crusher wear quickly. So it is often needed to replace the parts. There are two kinds of cross-section structures shape of the tooth plate, the smooth surface and the lattice surface. Because of its heavyweight, it is necessary to make a structure that can be easily replaced.
The tooth plate is fixed by bolt or wedge, which is fixed on the front wall of the frame or the moving jaw. The contact surface between the two must be straight, not allow happen the accidental phenomena. If there is a high point of contact, it needs to be handled in time. Because the inner side of the front wall of the rack is not processed. So the soft metal gaskets are placed between the back of the fixed jaw plate and the front wall of the rack to ensure that the two are closely fitted.
Due to the jaw crusher vibrates heavily during operation, it should be installed on the concrete base. In order to reduce vibration, noise and impact on nearby buildings, between the crusher and the concrete foundation is cushioned with hardwood backing plate, rubber belt or other damping material.
The size of the discharge port should be adjusted according to the required product size. When adjusting, loosen the bolt and tighten the spring. Using the lifting bolt to open the adjusting seat, insert or remove the corresponding thickness of the gasket. Then back up the lifting bolt. The adjusting seat is pressed against the frame ear seat under the action of the moving jaw weight. At the same time, the gasket group is pressed together. After that, adjust the spring pre-pressure to ensure that the machine work. Therefore, the thrust plate and thrust plate pad close. But the pre-pressure should not be too large, not the knock is ok. Finally, a locking adjustment seat.
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