Multi-cylinder cone crusher high oil return temperature solution

Product introduction:https://www.cementepc.net/crusher/Cone-crusher.html

Jiangsu LVSSN company core cement epc

Multi-cylinder hydraulic cone crusher is widely used in sand and stone aggregate and mining industry, especially in medium and hard material medium and fine crushing processing system.Multi-cylinder hydraulic conical broken lubricating oil is used for lubrication and heat dissipation.But when abnormal, multi - cylinder hydraulic cone broken lubricating oil is used for lubrication and heat dissipation.
 

1. Oil return temperature is an important parameter for the broken operation of multi-cylinder hydraulic cone

Computer and program real-time monitoring.In winter, when the temperature of oil tank of multi-cylinder hydraulic cone crusher is lower than 20°C, the heater should be opened and the heater should be turned off at 25°C.Do not start the crusher if the return oil temperature is lower than 17°C.In summer, when the return oil temperature is higher than 45°C, the radiator opens and closes when the temperature drops to 40°C. When the return oil temperature rises to 55°C, an alarm will be sent indicating the high return oil temperature.If return oil temperature and feed linkage, the system automatically stop feeding.When the return oil temperature reaches 60°C, the multi-cylinder hydraulic cone crusher stops and the system stops feeding.
 

2. The key to control the oil return temperature of the crusher

The key to control the oil return temperature of the crusher is to control the ambient temperature and effectively dissipate heat.In order to ensure the heat dissipation effect of lubricating oil, the amount of oil passing through the crusher must be up to 200L/min.Multi-cylinder hydraulic cone crusher standard with air cooling radiator, the key is to have good air circulation, and radiator suction air for low temperature air.

If the site cannot provide a better heat dissipation environment, but the water source is sufficient, the air cooling radiator broken by multi-cylinder hydraulic cone can be replaced with water cooling radiator, or a water cooling device can be installed in parallel with the water flow of 200L/min.Compared with air cooling, water cooling can provide better cooling effect, but water cooling conditions are not available in many equipment sites due to water shortage and other factors.

The most critical thing is that we should solve the solution according to the actual situation of the site, so as to achieve the maximum efficiency.

The page source:https://www.cementepc.net/productknowledge/Multi-cylinder-cone-crusher-high-oil-return-temperature-solution.html

Clearance problem leads to heat treatment of crusher bearing

Product introduction:https://www.lvssn.com/crusher/

The bearing of limestone crusher has the problem of long-term heating, and two sets of bearings need to be changed every year, which not only affects the increase of expenditure, but also affects the production efficiency. The clearance problem leads to the treatment measures of heating of the bearing of crusher
 

1. Basic information of crusher

In the production process, the temperature of the two sets of bearing of the crusher rotor is around 85℃ all year round. Especially in summer, the bearing must be cooled down with compressed air, or even cooled by cooling water on the bearing seat at the end of the pulley, so as to maintain normal production.Crusher free end (non-transmission end) bearing due to heat damage, every year to replace two sets.

 

2. Analysis of bearing heating

 

(1) selection of lubricating oil:

The rotor bearing of the crusher is lubricated by mobil EP2 grease. The various indexes of grease can meet the stable operation of the bearing.
 

(2) problems of lubricating oil pollution:

Open the end cover of the bearing and check, the grease is clean and no impurities such as ash are introduced, so as to eliminate the bearing heat caused by this problem.
 

(3) excessive addition of grease in the bearing:

In general, excessive grease will lead to poor bearing heat dissipation, resulting in bearing heat.There is an oil drain hole at the lower end of the end cover of each bearing seat of the crusher rotor. Excessive oil addition will lead to a rise in temperature in a short time. After the old oil is discharged after a period of operation, the temperature of the bearing will return to normal.The crusher bearing perennial temperature in 85℃ or so high temperature operation, it should not be caused by this.
 

(4) bearing assembly:

Open the outer end cover of the free end bearing for inspection, measure the distance from the outer ring of the bearing to the side of the bearing seat is 26.3mm, and measure the length of the end cover stop of the bearing 30mm.
 

(5) calculation of thermal expansion of rotor shaft:

The center distance between the two ends of the bearing is 3400mm, the working temperature difference is 100℃, the expansion coefficient of ordinary carbon steel is 1.2×10-5/℃;The expansion amount was 4.08mm(3400mm×100℃×1.2×10-5/℃).
 

Compared with the two data, the problem of bearing heating was confirmed. It was because the outer end cover of the free end bearing was pressed too tightly, the end cover stop was pressed on the outer ring of the bearing, and there was no thermal expansion of the rotor shaft, which caused the bearing heating of the crusher.

When the limestone crusher works normally, the thermal expansion of the rotor shaft is 4.08mm.When the rotor is running, the bearing temperature will gradually rise, the rotor shaft will also elongate, and the free end bearing will produce axial displacement with the change of temperature.In consideration of assembly size and other errors, during the installation process of the rotor, a distance of more than 10mm should be reserved between the outer end cap and the outer ring of the free end bearing to ensure the thermal expansion of the rotor shaft in the normal production process. Otherwise, the bearing will suffer from high temperature due to the axial force and run for a long time, and the bearing will be damaged.

Therefore, the problem of swimming clearance is the root cause of bearing running at high temperature for a long time.

 

3. Measures to solve the heat of crusher bearing

According to the above analysis, the non-axial thermal expansion of free-end bearing is the main cause of bearing heating, which can be solved by adjusting the gap between the outer ring of bearing and the stop of bearing end cap.
 

There are two solutions, one is the bearing end cover stop car off 10mm;The other is to add a gasket to move the bearing end cover out.

After proper installation of the limestone crusher, the working temperature of the free end bearing is stable at 56℃ and the temperature of the belt wheel end bearing is stable at 68℃ after starting production, and the bearing heating problem is completely solved.The abnormal situation of the equipment is mostly caused by the incorrect installation according to the technical specification.As long as the cause is found and targeted technical measures are taken, the problem will be readily solved.

The page source:https://www.lvssn.com/Industry/Clearance-problem-leads-to-heat-treatment-of-crusher-bearing.html

Choose to buy the main points of crusher equipment

Product introduction:https://www.lvssn.com/crusher/Cone-crusher.html

With the rapid development of industrial construction, the types and types of crushing equipment are also increasing.The increasing types and models of crushing equipment provide more choices for users, and at the same time, customers are faced with the situation that they do not know how to choose appropriate crushing equipment when selecting crushing equipment.Choose to buy the main points of crusher equipment

For an aggregate sand and stone plant, different capacity and function of the crushing equipment to configure the production line to meet production requirements.So how to choose to adapt to their own stone field production requirements of the crusher equipment?

 

1. Characteristics of stone

The hardness, mud content and water content of the stone are very important data. In addition, the head breaking equipment should be selected according to the maximum particle size of the stone.

If the hardness of broken stone is too large, such as granite, basalt, pebbles and other stone, can choose jaw crusher, cone crusher for crushing;Less rigid stones, such as limestone, can choose the impact crusher for secondary crushing.

To minimize the wear of the tooth plate and other wearing parts, that is to save the production cost, but also improve the production efficiency.

 

2. Requirements on product quality

The customer's requirements on the size of the finished product, stone shape and other requirements also determine what kind of crushing equipment should be chosen.If the size of the crushed sand is different, the screening equipment should be equipped for screening.

In many projects, sand if the soil content is too high, also need sand washing machine, add a sand washing process.

 

3. Use of finished products

Need to according to the user finished stone configuration of stone production equipment reasonable arrangement.For example, highway, high-speed railway, dyke and other projects have high requirements on stone materials. If such projects are constructed with cracks and sharp corners, the risk of project collapse will be increased.The impact crusher is usually used to treat the stone material to meet the standard of fine material.

When choosing crushing equipment, users should take the above three points into full consideration and choose crushers according to their actual needs. If you need, you can leave a message with us, and we can give you more choices.

The page source:https://www.lvssn.com/Product/Choose-to-buy-the-main-points-of-crusher-equipment.html

Why is the impact crusher cost-effective crusher equipment?

Product introduction:https://www.lvssn.com/crusher/Impact-crusher.html

In many mine crusher crusher belongs to the model of high cost performance, many customers will first choose this equipment, impact crusher in the process of processing crushing mainly used in the second and third stage of crushing, why is impact crusher cost-effective crusher equipment?
 

1. The material hardness of impact crusher is relatively large

Impact crusher plate hammer material hardness is high, through the mechanical clamp firmly fixed on the rotor, with the rotor rotation increase the inertia, is in the crushing process can quickly break the material, to achieve the effect of rapid crushing.

 

2. Counter crushing function can deal with materials with large water content, high humidity of materials, not easy to produce dust, and better solve the problem of material blockage

When the water content of the broken material is relatively large, the feeding bin and the impact plate of the impact crusher can assemble the heating project, which can increase the crushing effect while preventing the material from bonding, and the impact plate system does not need to install the screen plate, effectively preventing the material from clogging.

 

3. Vulnerable parts wear little, metal utilization rate is high.

Counterattack plate can be adjusted, in the broken period of time, the high utilization rate of the counterattack plate will appear wear, this case can replace the counterattack plate, no wear of the counterattack plate replacement of the high wear of the counterattack plate to continue to use, solve the cost of replacement of the counterattack plate, better use of common resources.
 

4. Adjust the discharge port for high output

Adjust the discharge port, can increase the amount of discharge, can adjust the upper middle lower spring counterattack position, increase the size of the discharge port.

 

5. Easy and quick replacement of accessories

Use hydraulic wall to open the back cover of the counterattack plate, lift the rotor to replace the plate hammer, this process is simple to operate, a person can be more slippery, save the task of material resources.

Impact crusher is a cost-effective crushing equipment, widely used, simple structure, convenient maintenance, high spare parts utilization rate, large crushing output, if you have more questions can give us a message,

The page source:https://www.lvssn.com/Product/Why-is-the-impact-crusher-cost-effective-crusher-equipment.html

Do you know the effect of temperature change on the crusher?

Product introduction:https://www.cementepc.net/crusher/crusher.html

With the different seasons, the temperature change will have a certain impact on the production line, especially the production effect of the crusher under different temperatures will be greatly different, do you know the impact of the temperature change on the crusher?

1. Influence of high temperature on crusher

In a high temperature environment, the temperature of the crusher itself will rise, easy to produce unpredictable abnormal conditions, such as sudden shutdown, spindle sudden fracture and other faults;

Because of the principle of thermal expansion and cold contraction, the high temperature will expand the parts of the crusher, resulting in more friction and deviation at the bite of each part, which will not only affect the production schedule, but also make the temperature rise further;

High temperature environment will make the crusher lubricating oil temperature rise high, oil and viscosity decline local oil film damage, parts between the lubrication effect and bearing bearing capacity reduction, what's more, lubricating oil carbonization, burning tile.

2. How to reduce the influence of high temperature environment?

 

Although high temperature environment is inevitable, we can still reduce the impact of high temperature through some human efforts:

(1) for the crusher installed in the outdoor, we can build a sunscreen net or shade net to block the sun and prevent the equipment from long-term exposure.Long exposure to the sun will lead to aging of the equipment, affecting the quality and efficiency of the broken equipment.

(2) for the crushing machine installed in the room, it is necessary to keep good ventilation in the room, adjust the indoor temperature, and the gout and air permeability of the surrounding environment.It is best to ensure that the working environment temperature does not exceed 40 degrees, to maintain a good working environment for the crusher.

(3) for the core parts and wear-resistant parts of the crusher, the operator should frequently check the values on various temperature meters in the work, stop the machine immediately if any problem is found, and remove the fault immediately if any.For a time can not find the reason, must not be treated and still make the crusher disease work.

In the work of the crusher, we should not only care about the ambient temperature, but also pay more attention to the daily maintenance of the equipment, to ensure the normal and efficient operation of the equipment.

The page source:https://www.cementepc.net/company/Do-you-know-the-effect-of-temperature-change-on-the-crusher.html