The upper end of the main shaft with the crushing cone is supported in the bushing in the middle of the beam, and the lower end is placed in the eccentric hole of the shaft bushing.When the shaft sleeve rotates, the crushing cone rotates eccentrically around the machine centerline. Its crushing action is continuous, so the working efficiency is higher thanJaw crusher。By the early 1970s, the large rotary crusher could handle 5000 tons of materials per hour, and the maximum feeding diameter could reach 2000 mm.gyratory crusher There are two ways to realize the adjustment of the discharge port and overload insurance: one is to use a mechanical way, and the upper end of the main shaft is equipped with an adjusting nut. When the adjusting nut is rotated, the crushing cone can fall or rise, so that the discharge port will become larger or smaller. In case of overload, the safety pin on the drive pulley will be cut off to achieve the safety;The second is hydraulicHydraulic rotary crusherIts main shaft is located on the plunger in the hydraulic cylinder. Changing the volume of hydraulic oil under the plunger can change the upper and lower positions of the crushing cone, thus changing the size of the discharge port.In case of overload, the downward pressure of the main shaft increases, forcing the hydraulic oil under the plunger into the accumulator in the hydraulic transmission system, so that the crushing cone drops to increase the discharge port, and the non broken objects (ironware, wood blocks, etc.) that enter the crushing chamber with the materials are discharged to ensure safety.[1]
Product benefits
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Cyclic crusher and bacteriaCone crusherIt is a kind of cone crusher.The rotary crusher is a coarse crusher. Compared with the jaw crusher, it has the advantage that the crushing process is continuous along the annular crushing chamber, so it has high productivity, low power consumption and stable operation.Suitable for crushing sheet materials.It can be seen from the particle size distribution curve of finished products that, in the particle size composition of finished products, the particle size of materials beyond the width of the discharge port is smaller than that of the jaw crusher, and the quantity is also less, and the particle size is relatively uniform.In addition, raw materials can be directly poured into the feeding port from the transportation tool, without the need for a feeder.The disadvantages of gyratory crusher are: complex structure and high price;The maintenance is difficult and the repair cost is high;The high fuselage increases the cost of buildings such as factory buildings and foundations.
The rotary crusher is suitable for use in factories and quarries with large production.According to experience, if one jaw crusher meets the production requirements during model selection, the jaw crusher shall be used;If two jaw crushers are required, one rotary crusher shall be considered.[2]
Working characteristics
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(1) The structure is simple and reasonable, and the operation cost is low.It uses the principle of stone hitting to reduce wear.
(2) High crushing rate and energy saving.
(3) It has fine crushing and coarse grinding functions.
(4) It is less affected by the moisture content of materials, and the moisture content can reach about 8%.
(5) The working noise is lower than 75 dB (db level), and the dust pollution is less.
(6) Suitable for crushing medium hard and extra hard materials.
(7) The product is a cube with high stacking density and minimal iron pollution.
(8) Impeller self lining is less worn and easy to maintain.[2]
Troubleshooting
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1. Fault phenomenon: fine granularity;
Cause: many hammers;
Solution: Remove one or two layers of hammerheads.
2. Fault phenomenon: coarse granularity;
Cause: loose belt or low speed;
Solution: tighten the belt and check whether the voltage is 380V.
3. Fault phenomenon: the crusher body swings;
Cause: unbalanced centrifugal force of rotor;
Solution: Replace the hammer head with a new one, or adjust the weight of the pusher head.[3]
Installation method
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1. The equipment shall be installed inconcreteThe foundation is horizontal and fixed with the anchor rod.
2. Pay attention to the installation of the main body and the vertical and horizontal.
3. Check whether some bolts are loose after installation, and strengthen whether the door of the host warehouse is tightened as required.
4. Configure the power cord and power supply according to the equipmentControl switch。
5. After inspection, empty load test, test and production can be normal.[3]
Operating procedures
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1. Before starting, check whether the mechanism is a compartment door. It is strictly prohibited to open the door during machine operation to prevent danger.
2. The crusher must be started in an empty state, and the purpose of production can only be started after normal operation.
3. According to the requirements of particle size of incoming materials, the assembly has caused equipment damage and low output.
4. The abnormal interruption results show that the inspection is stopped, the problem is solved, and then used for production.
Compound crusherIt is mainly used for secondary and tertiary crushing of hard ores and rocks in metallurgical, mining, chemical, cement, construction, refractory and ceramic industries. The crushing compressive strength of materials is not more than 200MPa. The feed particle size is 450-1000mm, and the average discharge particle size is ≤ 5-8mm.[3]
Prospect of compound crusher
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Facing the arrival of the peak period of China's high-speed railway construction,Composite crusherThe market demand is particularly strong.However, due to the construction of high-speed railwaySand aggregateandConcrete aggregateThe demand for composite crusher is relatively high, and there are at least ten large enterprises with this production capacity in the industry of composite crusher to meet the demand.The compound crusher has been widely installed in the construction of expressways and high-speed railways in various provinces and cities across the country, and is an indispensable equipment for national infrastructure.For basalt crushing, the stones crushed by composite crusherImpact crusherThe needle and flake content of stone can be reduced to about 4% after granulation, which is an ideal compound crusher equipment in the production of sand and gravel aggregate.[3]
Maintenance
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The compound crusher is used to crush iron ore, sandstone, gypsum, blast furnace slag, coal gangue and lump coal. It is inevitable that the compound crusher will be covered with dust after a long time of use. If there is more dust, the normal operation of the compound crusher will be affected, leading to the shortening of the service life of the compound crusher.Today, I will teach you how to effectively remove the dust inside the compound crusher.
1. SetCompound crusherAnd belt conveyor cornerBag filterThey are updated to LNGM64-4 and LNGM4-8 bag filters respectively, and their technical performance parameters are shown in Table 2.According to the characteristics of dust, water and oil repellent filter materials are used.LNGM4-8 bag filter is arranged in the open air, and its shell is insulated and waterproof.In order to ensure the reliable operation of the equipment, attention should be paid to the brand, specification and model when purchasing the key accessories of the bag filter to reduce the failure rate of the equipment.
2. Improved bag typea dusterThe dust remover of the composite crusher is arranged according to the direction of the belt conveyor;The standard ash hopper of the bag type dust collector is transformed into a double ash hopper structure, so that one set is canceledScrew conveyorRaise the bag filter to facilitate the layout of the air inlet pipe (the angle of the air inlet pipe is large);An air inlet box is set at the air inlet, so that the dust at the blanking port of the composite crusher directly enters the air inlet box of the dust remover, which saves the elbow, reduces the system resistance, and improves the dust collection efficiency.Its process layout.The single-layer flap valve is used for ash hopper air lock, and the grid wheel feeder and its motor are eliminated to reduce the secondary dust and improve the dust removal effect.
3. The dust at the corner of the belt conveyor is restricted by the site conditions, and its chute and dust cover cannot be changed. The dust removal process is arranged in the form of Figure 4, so that the dust cover is in a slightly negative pressure state to eliminate the dust of the belt conveyor.
4. In order to improve the comprehensive dedusting effect of the composite crusher and belt conveyor, the material inlet of the composite crusher can be properly watered as required when crushing dry materials (it is required to start the composite crusher 10~20min later), based on the service life of the filter material and pulse valve as well as the dust raised at the ash hopper.
5. Strengthen the management of dust removal equipment, regularly check the tightness of dust removal hood, and timely deal with problems found.For post environment andBag filterThe objective management assessment shall be carried out for the dust emission of, and the dust monitoring shall be carried out regularly. The economic lever shall be used to mobilize the work enthusiasm of the post personnel, improve the maintenance level of the dust removal equipment, and minimize the dust pollution.[3]
