How much do you know about installation of cone crusher?

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

Jiangsu LVSSN company core cement epc

Cone crusher is a very important equipment in the crushing equipment, in the crushing, sand production line application is very frequent.Good choice of equipment is the first, the equipment is better after the installation of the more important.How much do you know about installation of cone crusher?

1. The cone crusher shall be supplied after installation by the manufacturer. After receiving the cone crusher, the user shall check and eliminate all kinds of problems arising in transportation before installation.

2. When installation, the longitudinal horizontal tolerance of the bottom plane of the frame of the cone crusher is 0.5mm/m, and the horizontal horizontal tolerance (measured on the spindle) is 0.15mm /m.

 

3. The parts on the upper part of the frame shall be assembled after leveling and straightening the frame and tightening the anchor bolts.

4. The cone crusher must be checked comprehensively before starting.The fastness of the fixed parts, the lubrication of each part and the proper tension of the triangle belt should be the focus of inspection.

5, the inspection must cut off the main circuit switch, and on the switch hanging a clear sign, marked "do not close" and other words.

6, the cone crusher must start with no load, no load test run shall not be less than 2 hours, during the test run should pay attention to observe the work of the cone crusher, if found abnormal phenomenon immediately stop, and find out the reason;The machine can be restarted after elimination.

 

7, the ore should be uniformly fed into the crushing chamber of the cone crusher by the feeder.Start load test should be given a small amount of ore, gradually transition to half-load, full.If the ore block into the crusher is too large or too much ore, or often fall into non-broken material (metal block) will speed up the wear and damage of the machine.Therefore, it is necessary to control the large piece of ore and non-broken material falling into the machine and maintain even feeding.

8. When the cone crusher is working, the stable maintenance temperature of the bearing shall not exceed 75℃. If it exceeds the temperature, the machine shall stop immediately to remove the fault.

9, cone crusher stop, should first cut off to the ore feed.After the ore in the crushing chamber is completely broken, the power supply of the main motor is cut off and shut down.

10. Centralized oil supply system is adopted for lubrication.When feeding oil, pay attention to the amount of oil on the bracket support surface.The user can also supply oil directly from the grease gun to the grease hole of the bearing.Don't waste too much.The user can adjust the oil feeder of the lubrication system to achieve the purpose of reasonable oil supply.

 

11, the discharge port of the cone crusher can be adjusted according to the specification, the user can according to the required size and the wear of the tooth plate in the work, change the number of shim in the support at any time, in order to adjust the discharge port, to obtain a satisfactory size.

Above is our company to buy cone crusher customers remind, if you still know what need to pay attention to, please leave a message with me.

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What are the problems with the jaw crusher frame?

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

Jiangsu LVSSN company core cement epc

Jaw crusher within different parts, each plays a different role, frame is one of the parts of the machine, also is the basis of its installation, at the same time the parts at the time of use, will bear a larger impact load, the impact load for the service life of the equipment and the working performance has an important influence, so it requires its strength and stiffness can meet the requirements of production, What are the problems with the jaw crusher frame?

1. Analysis of working principle

About the working principle of jaw crusher, presumably everyone not unfamiliar, mainly of the reciprocating motion by using the transmission mechanism to drive, to achieve for stone crushing homework, in the process of the broken stone from large to small, so will produce certain impact, this action will cause the vibration of the frame to produce, therefore, the rack used in jaw crusher, one problem is the choice and design of vibration isolation measures.

2. Cracks appear in jaw crusher

For jaw crusher, the structure of the frame is not a single, some rack belong to the structure of the casting molding, crushing processing jobs in a long time, the filter screen of the particle size is reduced, equipment also row ore mouth gap decreases, this phenomenon will increase rack in production under the impact strength, makes the equipment load increase, this will lead to frame steel plate in the erect crack appears on the surface, the conventional welding cannot make cracks inside achieving full healing, so the welding frame in the running for a few days after will continue to crack, in this way,Jaw crusher frame is basically normal operation after a few days will be for welding time, but due to the structure of the machine problems, every time the welding time is longer, if not timely for welding repair, will lead to frame fracture completely, also cause crusher thoroughly destroyed, it will reduce the service life of equipment, increase the economic burden of production operation;

Jaw crusher frame at the time of use, the problems, through the introduction of the above you can see, mainly is two aspects, one is the selection and design of vibration isolation measures, it is a long time and high frequency welding, will increase the economic burden of the equipment and reduce its service life, so the frame when choosing to pay attention to the stiffness and strength, to pay attention to when using operation is correct, and its load is reasonable.

The page source:https://www.cementepc.net/company/What-are-the-problems-with-the-jaw-crusher-frame.html

Causes and treatment measures of several typical vibration of rotary kiln

Product introduction:https://www.lvssn.com/bruning/Rotary-kiln.html

Jiangsu LVSSN company core cement epc

Customers who have used the cement rotary kiln have basically encountered the vibration of the rotary kiln's large tooth ring.Generally, there are three major reasons for mechanical, technological and electrical reasons.Causes and treatment measures of several typical vibration of rotary kiln

 

1. Vibration caused by mechanical reasons and treatment

 

1.1 the closing bolt is loose or broken

After the closure bolt of large gear ring becomes loose or broken, the pitch of gear increases. When meshing with the pinion, the rotary kiln will vibrate due to the different pitch.Closure pin fracture, will make the closure surface dislocation, will have the same result.If this is found, the pin should be replaced, tighten or replace the bolt can be restored to the closed surface tooth size can be.
 

1.2 deformation of large gear ring

When the large gear ring loses its ring deformation, the local pitch changes and the local center distance also changes, which directly affects the meshing accuracy of the gear.When the ring is convex, the gap between the top of the tooth is reduced, giving out a dull root biting sound and causing vibration.In this case, only by lowering the top height or the center height of the rotary kiln, that is, reducing or expanding the center distance of the rotary kiln size gears, can the meshing precision of the gears be adjusted to a tolerable state, so as to reduce the vibration.To achieve the ideal condition, it is best to replace the large gear ring, because it is very difficult to correct the gear.
 

1.3 improper kiln adjustment

Sometimes, in order to adjust the stress state of the supporting wheel or belt, the contact between the gears is not taken into account. For example, if the rotary kiln is pushed to the side of the pinion, the top clearance will be reduced and root biting vibration will be generated.If pushed to the outside of the pinion, also because the top gap is too large, overlap cannot keep up with and cause vibration.The treatment method is, rotary kiln adjustment to take into account the gear meshing, through adjusting the size of gear meshing precision can be restored.
 

1.4 gear cracking or broken teeth

The pitch of gear teeth changes after gear cracks or cracks or even broken teeth, which affects gear meshing accuracy and causes vibration.At this time, the cracks and broken teeth must be processed, and restore the geometric size, if necessary to replace the large ring teeth.
 

1.5 insufficient installation accuracy

Insufficient installation accuracy of rotary kiln will not only affect the contact length and width of the gear, but also affect the top clearance and side clearance of the gear, causing vibration.This time need to check carefully, for the identified problems, one by one adjustment (through the wheel adjustment), so that it can achieve good contact accuracy.

 

2.Vibration caused by process

Process causes the vibration of the rotary kiln, is mainly refers to abnormal caving of the skin of the kiln, barrel temperature change after everywhere would create a warp in the cylinder, make big gear ring, the rotary center of deviation from the normal size when the center distance of gear when small, produces vibration, the need to adjust process parameters, the rotary kiln shell temperature returned to normal, avoid cold and hot half a circle is not normal, kiln will slowly unbend, big ring gear rotary center will gradually returned to normal, vibration will disappear.

There is also a case to draw attention to, that is, the barrel temperature at the big gear ring can not be too high, it will seriously affect the temperature of the big gear ring, once the expansion of the big gear ring because the temperature is too high more than the expansion of the belt, the gap between the tooth tip will be reduced, making it possible to bite the root, vibration may occur.At this time, it is necessary to keep the cooling of the gear ring or the top rotary kiln to ensure the normal engagement of the gear.

 

3. Electrical influence

The influence of electrical equipment mainly refers to the vibration caused by the unsteady rotating speed of rotary kiln due to signal fault.After the kiln speed distortion caused by the fault of the tachometer generator, the rotary kiln is fast and slow, with high frequency and great difference in speed and slow. The gear has constant impact and great vibration. After the contact with the slip-ring and the line of the tachometer generator, the kiln runs steadily and the vibration disappears.

This paper is only a description of several kinds of vibration of rotary kiln gear ring, which is not comprehensive. If you have better opinions, please leave a message to me for communication.

The page source:https://www.lvssn.com/company/Causes-and-treatment-measures-of-several-typical-vibration-of-rotary-kiln.html

How much do you know about the inspection and maintenance of the Vertical mill?

Product introduction:https://www.lvssn.com/mill/Raw-material-vertical-mill.html

Jiangsu LVSSN company core cement epc

Vertical mill as the main machine equipment of cement enterprise, the operation of the good or bad directly affects the benefits of the enterprise, its inspection and maintenance is very important, how much do you know about the inspection and maintenance of the opposite Vertical mill?
 

1. Inspection parts and methods of vertical mill

 

The vertical mill is composed of its power, transmission, lubrication, powder selection, feeding pipe, inlet and outlet air pipe, sealing, discharging mechanism and main machine, etc. The system is huge and complex, and the patrol inspection and maintenance task is heavy.The brief is as follows:
 

1.1 power part inspection

The power mainly refers to the main and secondary motors of the vertical mill.Check whether the motor grounding is loose and tighten it in time if any problem is found.Whether the position switch of the auxiliary motor is normal;Whether the various types of cover loose friction;Motor vibration, sound, temperature rise, current, voltage and other normal;Whether the motor lubrication is normal, whether the oil supply pressure, oil supply temperature, cooling water, inlet and outlet temperature of the oil station are normal, whether the oil level and filter pressure difference of the oil station are normal.If there are problems in the vertical mill, the causes should be analyzed and symptomatic treatment should be conducted.
 

1.2 inspection and maintenance of transmission parts

The transmission part includes a coupling, a reducer, and a service station.The inspection of the vertical mill oil station includes whether the oil level is deficient, whether the pressure is normal, whether the oil return, oil supply and temperature of the oil tank are normal, whether there is oil leakage or not, whether there is oil passing through through the tubing temperature, and whether the filter oil pressure difference is normal.Vertical grinding reducer is the focus of the inspection, to listen to the internal bearing, gear meshing sound is uniform, to test whether the vibration of each part is abnormal, the temperature of each detection point is normal, whether the foot is loose.If any abnormality is found, it must be analyzed and handled. Here, the position of the fault can be determined by comparing the rotation speed of each shaft with the sound and vibration frequency.Check oil supply pipeline and airframe for oil leakage, etc.
 

1.3 part of grinding mill inspection

The grinding part includes pressure station, grinding roller, grinding disc and its support.The patrol inspection of this part shall first check whether the pressurization station and its pipelines are normal, whether the accumulator is normal, whether the hydraulic cylinder is leaking oil, whether the hinge connection above and below the hydraulic cylinder is abnormal, whether there is abnormal sound or impact.Check whether the support rotation of the grinding roller is abnormal, whether the fastening bolts and the gland are loose and exit, whether the lubrication of each joint bearing is in place, whether the hydraulic rod seal and the connecting parts of the hydraulic rod are abnormal, whether the back of the grinding body is damaged, whether the casing is worn through and other abnormal conditions.Listen to the sound and vibration in the vertical mill.
 

1.4 inspect the wind material connecting pipe of the mill

The pipe around the vertical mill mainly refers to the inlet and outlet air pipes, feeding and slag discharging pipes.It mainly checks whether the connecting bolt of the inlet and outlet air duct is loose and whether the soft connection is damaged or leakage.Whether the feeding and discharging pipe is worn through, whether the feeding and discharging mechanism is flexible and effective.
 

1.5 inspection of powder separator

The concentrator is located on the top of the vertical mill. It mainly checks whether the motor, reducer and coupling work normally, whether there is any abnormality, whether the sound, vibration and temperature rise are normal.Listen to the selection machine internal sound is normal, whether there is friction block phenomenon.
 

2. Maintenance of vertical mill

 

The maintenance of vertical mill mainly refers to the treatment of common faults that can be seen and heard in the inspection.Mainly include:

Adjust the pressure and temperature of each oil station;Adjust cooling water flow and temperature;Tighten oil, water and air pipe fittings to eliminate drip leakage;When the oil level of the vertical mill oil station is insufficient, timely supplement;When the platform and support are loose, reliability treatment shall be carried out;In case of oil pollution or other pollution, clean up the equipment in time to ensure the sanitation of the equipment;For the equipment air leakage should be blocked in time to reduce reactive power consumption;When it is found that there are dangerous equipment and unstable material of personal safety around the vertical mill equipment, it should be removed in time.Dredge the lubrication pipes of the joint bearing and hinge joints in time to ensure lubrication.When foundation bolts or other connections are found loose, they should be tightened in a timely manner.And so on.

As for the problems that must be solved by shutdown in the patrol inspection, the reasons should be analyzed, the fault location should be determined, the solution should be made and reported to the relevant management personnel or management department, waiting for the shutdown to be arranged.

The page source:https://www.lvssn.com/Product/How-much-do-you-know-about-the-inspection-and-maintenance-of-the-Vertical-mill.html

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