Gyratory Crusher

1. Gyratory crusher Product principle

The upper end of the main shaft with the crushing cone is supported in the bush in the middle of the beam, and the lower end is placed in the eccentric hole of the shaft sleeve. When the shaft sleeve rotates, the crushing cone makes an eccentric revolving movement around the center line of the machine. Its crushing action is continuous, so the working efficiency is higher than that of the jaw crusher. By the early 1970s, the large-scale gyratory crusher was able to process 5000 tons of materials per hour, and the maximum feed diameter could reach 2000 mm. The gyratory crusher uses two methods to realize the adjustment of the discharge port and overload insurance:

 one is the mechanical method, with an adjustment nut on the upper end of the main shaft, rotating the adjustment nut, the crushing cone can be lowered or raised, so that the discharge port will follow When the load becomes larger or smaller, the safety pin on the drive pulley is cut off to realize the insurance; 

the second is the hydraulic gyratory crusher, the main shaft is located on the plunger in the hydraulic cylinder, and the plunger is changed. The volume of hydraulic oil can change the upper and lower positions of the crushing cone, thereby changing the size of the discharge port. When overloaded, the downward pressure of the main shaft increases, forcing the hydraulic oil under the plunger to enter the accumulator in the hydraulic transmission system, causing the crushing cone to descend to increase the discharge port, and to discharge the non-standard materials that enter the crushing chamber with the material. Broken objects (ironware, wood blocks, etc.) to achieve insurance.

2. Gyratory crusher Product advantages

Both the gyratory crusher and the fungus cone crusher are a kind of cone crusher. The gyratory crusher is a coarse crusher. Compared with the jaw crusher, its advantage is that the crushing process is continuously carried out along the circular crushing cavity, so the productivity is high and the power consumption is low. Work smoothly. Suitable for crushing flake materials. It can be seen from the particle size distribution curve of the finished product. In the particle size composition of the finished product, the particle size of the material exceeding the width of the discharge port is smaller than that of the jaw crusher, the quantity is also less, and the particle size is relatively uniform. In addition, the raw materials can be poured directly into the feed port from the transportation tool without the need to set up a feeder. The disadvantage of the gyratory crusher is: complex structure. The price is higher; the maintenance is more difficult and the repair cost is high; the higher the fuselage increases the cost of buildings, foundations and other structures.

The gyratory crusher is suitable for use in factories and quarries with large production volumes. According to experience, if one jaw crusher can meet the production requirements when selecting the model, the jaw crusher should be used; if two jaw crushers are required, a gyratory crusher should be considered.

3. Gyratory crusher Work characteristics

(1) The structure is simple and reasonable, and the operating cost is low. Using the principle of rock-to-stone, the wear is small.

(2) High crushing rate and energy saving.

(3) It has the functions of fine crushing and coarse grinding.

(4) It is less affected by the moisture content of the material, and the moisture content can reach about 8%.

(5) The working noise is lower than 75 decibels (db level), and the dust pollution is less.

(6) Suitable for crushing medium-hard and extra-hard materials.

(7) The products are cubes with high bulk density and minimal iron pollution.

(8) The impeller's self-lining wear is small and the maintenance is convenient.

4. Gyratory crusher Faults and troubleshooting methods

a. Failure phenomenon: fine granularity;

Reason: more hammers;

Solution: Lose one or two layers of hammers.

b. Failure phenomenon: coarse granularity;

Reason: loose belt or low speed;

Solution: Tighten the belt and check whether the voltage is 380V.

c. Failure phenomenon: the crusher body swings;

Reason: the rotor centrifugal force is unbalanced;

Solution: Replace with a new hammer head or adjust the weight of the push head.

5. Gyratory crusher Installation method

1) The equipment should be installed at the level of the concrete foundation and fixed with anchor rods.

2) The main body and vertical level should be paid attention to when installing.

3) Check whether some bolts are loose after installation, and strengthen the host country's warehouse door and tighten it.

4) Configure the power cord and power control switch according to the equipment.

5) After the inspection is completed, no load test, test, and production can be normal.

6. Gyratory crusher Operating procedures

1) Before starting, check whether the mechanism is a warehouse door. It is strictly forbidden to open the door during machine operation to prevent danger.

2) The crusher must be empty to start, and will only be used for production purposes after normal operation.

3) According to the requirements of the particle size of the incoming materials, the assembly has caused equipment damage and low output.

4). When the abnormal interruption result shows, stop the inspection, solve the problem, and then use it for production.

5) Add lubricant regularly to rotate bearing parts.

7. Gyratory crusher Application areas

The composite crusher is mainly used for the secondary and tertiary crushing of hard ores and rocks in the industrial sectors of metallurgy, mining, chemical industry, cement, construction, refractory materials and ceramics, crushing materials with compressive strength not greater than 200MPa, and the feed size is 450 -1000mm, the average output size is less than or equal to 5-8mm.

8. Gyratory crusher Prospects of composite crusher

Faced with the arrival of China's high-speed railway construction peak period, the market demand for composite crushers is particularly strong. However, due to the construction of high-speed railways, the requirements for aggregates of sand and gravel and concrete are relatively high, and there are at least ten large enterprises with this production capacity in the compound crusher industry that meet the demand. The compound crusher has been widely installed in the construction of highways and high-speed railways in various provinces and cities across the country, and is an indispensable equipment for national infrastructure construction. For basalt crushing, the stone material crushed by the compound crusher can be reduced to about 4% after being granulated by the impact crusher. It is an ideal compound crusher in the production of sand and gravel equipment.

9. Gyratory crusher Maintenance

The compound crusher is used to crush iron ore, sandstone, gypsum, blast furnace slag, coal gangue and lump coal. It will inevitably be covered with dust if it is used for a long time. If the dust is too much, it will affect the normal operation of the compound crusher. , Resulting in shortening the service life of the compound crusher. Today, teach you how to effectively remove the dust inside the compound crusher.

1). The bag filter at the corners of the compound crusher and the belt conveyor are updated to LNGM64-4 and LNGM4-8 bag filters. The technical performance parameters are shown in Table 2. According to the characteristics of dust, water and oil repellent filter materials are used. The 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, pay attention to the brand and specifications when purchasing key accessories of the bag filter to reduce the failure rate of the equipment.

2) Improve the process layout of the bag filter, arrange the dust collector of the composite crusher according to the direction of the belt conveyor; transform the standard ash hopper of the bag filter into a double ash hopper structure, thus eliminating one screw conveyor , Raising the bag filter is beneficial to the layout of the air inlet pipe (the angle of the air pipe is large); an air inlet box is set at the air inlet, so that the dust from the discharge port of the composite crusher directly enters the air inlet box of the dust collector, saving bending The head reduces the resistance of the system and improves the dust collection efficiency. Its process layout. The ash hopper lock air adopts a single-layer flap valve, which eliminates the divider wheel feeder and its motor, reduces secondary dust and improves the dust removal effect.

3) The dust at the corners of the belt conveyor is restricted by site conditions. The chute and dust cover cannot be changed. The dust removal process layout takes the form of Figure 4 to make the dust cover under a slight negative pressure to eliminate the dust from the belt conveyor.

4) According to not only the service life of the filter material and the pulse valve, but also the dust in the ash hopper, in order to improve the comprehensive dust removal effect of the composite crusher and belt conveyor, when crushing dry materials, Water needs to be properly sprayed at the material entrance of the composite crusher (required to be carried out 10-20 minutes after the composite crusher is turned on).

5) Strengthen the management of dust removal equipment, regularly check the airtightness of the dust removal hood, and deal with any problems in time. Implement target management assessments on the job environment and the dust emission of the bag filter, regularly conduct dust monitoring, use economic leverage to mobilize the enthusiasm of the job staff, improve the maintenance level of dust removal equipment, and minimize dust pollution.