Yini okufanele ngiyenze uma umugqa wokudlidliza komugqa wehluleka?

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Ekusetshenzisweni kwansuku zonke kwesikrini sokudlidliza komugqa, akunakugwemeka ukuthi omunye umonakalo ngeke uvele. Namuhla sethula amaphutha nezixazululo ezijwayelekile zesikrini sokudlidliza komugqa.

The linear vibrating screen is driven by double vibration exciters. When the two vibration exciters are synchronized and rotated in opposite directions, the excitation force generated by the eccentric block cancels each other in the direction parallel to the motor axis, and in the direction perpendicular to the motor axis. Stacking is a resultant force, so the trajectory of the screen is a straight line. The two motor shafts have an inclination angle relative to the screen surface. Under the combined force of the exciting force and the material’s self-gravity, the materials are thrown up and jump forward on the screen surface for linear motion, so as to achieve the purpose of screening and grading materials. Can be used to realize automated operations in the assembly line. It has the characteristics of low energy consumption, high efficiency, simple structure, easy maintenance, and fully enclosed structure without dust spillage. The high screening mesh is 400 meshes, which can screen out 7 kinds of materials with different particle sizes.

1. The pipe beam is broken

If the wall of the pipe beam is too thin, it may cause breakage. At this time, the thick-walled pipe of the same model or the larger one should be used. But it should not be too large or thick, because this will increase the vibration quality of the sieve and cause many problems; the joints of each sieve plate of the dewatering and de-intermediation screen must have horizontal and vertical beading. If there is no longitudinal beading, water The pipe beam will leak from the gap between the screens and the pipe beam will easily break at the scouring point; the wider the screen, the easier the pipe beam will break. According to experience, when the screen width exceeds 3m, use dual channels.

2. The beam is broken

The beam fracture is mostly due to the long working time at the critical frequency, the loosening of a large number of high-strength bolts that fasten the side plates, and the serious deformation of the spring makes the left and right heights vary greatly. It is also possible that the weight error of the eccentric block is too large, causing damage to the structural parts. The beam is broken. At this time, the damaged structural parts and beams should be replaced, the bolts should be tightened, and the quality of the eccentric block should be adjusted.

3. The screen frame is broken

The screen frame is prone to fracture due to shaking. The best way to solve this problem is to thicken the side plate or add additional plates to the local area of ​​the side plate near the exciter to enhance the rigidity of the entire screen frame.

4. The discharge port is broken

Since vibrating screens are generally manufactured non-standard, the sizes required by customers are different. Some require the discharge port to be extended forward or downward. In this way, the discharge port will be relatively more likely to break. If it is the first design, the plate thickness or ribs can be strengthened. If it breaks accidentally, check the material quality. Also check whether the parameters of the vibrating screen are correct. Furthermore, during the feeding process, avoid excessive feeding of the vibrating screen at one time. The screen can be basically fully utilized. The excessive feeding amount not only affects the screening effect, but also the screened material cannot be discharged through the screen in time. Excessive weight backlog will also cause the break of the vibrating screen’s discharge port.

Uma ulayini wokudlidliza komugqa wehluleka, ungabheka kulezi zindlela ezingenhla ukusixazulula, kepha uma inkinga yakho ingakaxazululwa, sicela uxhumane nomenzi wenkonzo yokuthengisa ngemuva kokuthengisa, bese ucela ochwepheshe ukuthi bayilungise ngesikhathi ukuze bagweme ukunciphisa umsebenzi wakho ukusebenza kahle.

Ungasigcina kanjani isikrini somugqa esidlidliza esitshalweni sokulungiselela amalahle

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Izikrini zokudlidliza komugqa zivame ukusetshenziselwa imisebenzi yokuqeda amandla nokususa amanzi ezitshalweni zokulungiselela amalahle. Zisetshenziselwa ikakhulukazi ukusebenza kwe-de-intermediation kanye nokususa amanzi ezitshalweni zokulungiselela amalahle.

There are many types of structure and transmission methods for linear vibrating screens, such as flexible connection, universal joint shaft connection, etc. The excitation methods include eccentric sliders, box-type vibration exciters and other forms. This article mainly introduces the current compact structure Regular operation and maintenance of linear vibrating screen in the form of box-type vibration exciter.

izindaba

1. Main components of linear vibrating screen

1. Screen body: usually adopt ring-groove rivets to clean and seal assembly to avoid the corrosion of the bolt joint surface by wet objects. At the same time, the side panels are assembled without welding seams and rivets hydraulically to ensure that the overall structure has no residual stress.

2. Vibration beam: usually a box-shaped design, the main welds are fully penetrated, first-level UT inspection and magnetic particle inspection, and heat treatment to eliminate welding stress to ensure high strength. Before assembling, the mating surface of the excitation beam is precisely processed by CNC machine tools, which effectively guarantees the overall assembly quality of the screen.

3. Crossbeam: Usually circular special pipe design is adopted, and the main welds are all penetrated. First-level UT inspection and magnetic particle inspection are carried out, and heat treatment is carried out to eliminate welding stress and ensure strength. The surface can be treated with polyurethane spraying process to improve erosion and corrosion resistance.

4. Vibration exciter: It is composed of special vibration bearing, eccentric pendulum block, magnetic oil plug and other components, and uses splash lubrication to excite. The exciter can work normally under the temperature of -30℃~+80℃, usually with special respirator.

5. Intermediate shaft: Use an intermediate shaft to connect between the two exciters to ensure the synchronous rotation of the left and right exciters. Both ends of the intermediate shaft are connected with the pendulum block of the vibration exciter by a unique elastic rubber disc coupling. The intermediate shaft is a rigid shaft, maintenance-free and without lubrication.

6. ​​Main drive shaft: The main drive shaft is a universal joint shaft that connects the statically fixed installation drive mechanism and the dynamic vibrating screen body.

7. Drive mechanism: The drive mechanism is composed of a motor, a belt drive and a countershaft assembly. The main motor has a large starting torque and fast acceleration, so that the screen machine quickly passes through the resonance zone. The motor is installed on the rail seat to facilitate belt tensioning. The transmission mechanism adopts belt drive to adjust speed and reduce speed, transmit power, and adjust the belt tension with guide rail seat screw tension motor. The countershaft assembly is composed of a countershaft, a bearing, an adapter sleeve, a labyrinth seal and an open bearing seat.

8. Cushioning spring: steel coil spring is used for vibration isolation and cushioning between the vibrating screen body and the installation base. The spring stiffness is small, which reduces the dynamic load on the base. Rubber pads are added at both ends of the spring to reduce the friction and friction noise between the spring and the steel spring seat plate.

9. Screen surface: According to the purpose and user needs, the screen surface adopts different types of sieve plates. The main types are: continuous sieve slotted polyurethane sieve plate, polyurethane frame stainless steel slotted sieve plate, polyurethane frame stainless steel woven sieve plate, polyurethane frame stainless steel punch Hole sieve plate.

2. The operating procedures of the linear dewatering screen:

1. Before driving, check carefully whether the sieve plate is damaged, loose, whether the eccentric shaft bolt is loose, whether there is any debris on the screen surface, whether the chute is unblocked, the water spray device is intact, and no one is working on the equipment.

2. The screen surface should be flat, free from damage or looseness, and the joints should be tight. The sieve holes and sieve slits of the deintermediation sieve should not be too large, small, or excessively worn.

3. The exciter, vibration motor and other lubrication parts should be well lubricated; the support spring should be free from damage, lack and aging failure; all safety facilities should be complete and intact, and comply with relevant regulations.

4. Try to drive without load; the sieve that needs to be sprayed with water should not be blocked, otherwise it should be cleaned immediately.

Three, the start and stop sequence of the linear dewatering screen:

Start sequence:

1. The inspection before the start of the separation screen is completed, and the shift leader or production dispatcher has been given a driving instruction to confirm that the equipment in the next process has been started and operating normally before starting the screen.

2. After the sieve is started, first turn on the water spray and confirm that it is normal before allowing the material to be fed to the screen surface. Adjust the water spray size in time according to the material on the screen surface.

3. After the start-up is completed, perform a comprehensive inspection and make a record of the shift.

parking sequence

1. You must get a parking instruction before you can stop.

2. It must be known that the equipment in the previous process has indeed been stopped.

3. Before stopping, all materials on the screen must be unloaded, and then shut down after turning off the water spray.

Four, operation and maintenance

1. Check the incoming materials, discharge and spray pipes regularly during operation, and report them if they are blocked.

2. Frequently monitor the eccentric shaft, whether the sound is normal, whether the sieve plate is loose, whether there is water running on the sieve surface, report and deal with it in time.

3. During operation, pay attention to check the temperature of each bearing, the temperature of the motor, the sound, the working state of the coupling and the amplitude of the screen under different loads, and report the problem in time.

4. The screen box should vibrate smoothly during operation, and there should be no abnormal swings. If the screen box shakes, check the working conditions of the four support springs and the running direction of the motor.

5. Pay attention to the working conditions of the exciter and the vibration motor during operation. The spindle should rotate flexibly and the bearing should be well lubricated; pay close attention to the bearing temperature.

6. ​​The vibrating screen should regularly check the concentration and particle size composition of the water under the screen to determine the wear of the screen. If the wear is serious, it should be replaced in time.

7. The de-intermediation vibrating screen should adjust the pressure and water volume of the water spray to ensure that the heavy medium of the product on the screen is flushed; often check (see, touch by hand) the de-intermediation effect and moisture of the product on the screen, and adjust according to the inspection result The amount of water sprayed can improve its cleaning effect; closely contact the density control driver to jointly adjust and ensure the deintermediation effect and dehydration effect of the deintermediation screen.

8. The technical indicators of de-intermediation and dewatering include: unit consumption of water spray, concentration of under-sieve and super-grain content, product on-screen and moisture. The driver should strive to complete the above-mentioned indicators stipulated by the factory.

Five, the main measures to complete the index of removal of referral and dehydration

1. In order to strengthen the maintenance of the equipment, keep the vibrating screen in a good working condition; clean the nozzles frequently to ensure uniform spraying; strengthen the management of the screen surface and observe the dynamics during operation. After parking, check frequently, clean up frequently, fill loopholes frequently, and clear blockage frequently to ensure the effective separation (water) area of ​​the screen surface.

2. It is strictly forbidden to put the scattered coal into the funnel under the sieve; it is strictly forbidden to run without water.

3. Regularly check, adjust and replace the coupling and support spring; clean the screen surface and chute; check the tightness of the screen surface, and deal with it if it is loose.

4. Sebenzisa isikhathi sokupaka ukwenza ukugcinwa kwemishini, futhi ubhekane nezinkinga ezenzeka ngesikhathi sokusebenza bese uhlole ngemuva kokupaka.

5. Yenza umsebenzi omuhle ezintweni zokusebenza kanye nokukhucululwa kwendle kwemvelo, gcwalisa ilog yomsebenzi njengoba kudingeka, futhi wenze umsebenzi omuhle wokushintsha amashifu.

Ukuhlaziywa kuthrekhi yokunyakaza kokuhlola kwezikrini ezahlukahlukene zokudlidliza

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Imishini yokuhlola edlidlizayo ngokuvamile isebenzisa imoto edlidlizayo njengomthombo wokuthakazelisa, ukuze isikrini sikwazi ukuthola amandla asebenzayo. Ukufakwa okuhlukile nezinhlanganisela zezimoto ezidlidlizayo emzimbeni odlidlizelayo zingaveza izembatho ezahlukahlukene zezemidlalo zezinto ezibonakalayo ngesikrini esidlidlizayo, ngaleyo ndlela kufezeke ngempumelelo Inhloso yokuhlola nokugreda ukuqedela imisebenzi yabo. Umzila wesikrini esidlidlizayo ungahlukaniswa cishe ngezinhlobo ezilandelayo:

1. Ukudlidliza komugqa

Linear vibration: the projection of the vibration trajectory of the vibrating body (vibrating box and material) on the horizontal and vertical planes is linear, and its vibration form is called linear vibration. This type of vibrating screen is called linear vibrating screen or linear screen. Install two vibration motors of the same model on the body of the vibration equipment so that the shafts of the two vibration motors are parallel to each other. When the two vibration motors rotate in opposite directions, the two vibration motors must run synchronously, and the body produces linear vibration. .

2. Rotational vibration

Rotary vibration is also called three-dimensional vibration: the projection of the vibration track of the vibrating body on the horizontal plane is a circle or ellipse, and its vibration form is called rotational vibration. This type of vibrating screen is called rotary vibrating screen. Rotary vibration can be divided into three forms: flat-rotation type vibration, vortex type vibration and double-rotation type vibration. When the projection of the vibration trajectory of the vibrating body on the vertical plane is a horizontal straight line, the vibration form is called pan-rotation vibration; when the projection of the trajectory of the vibrating body on the vertical plane is a diagonal line, the vibration form is called Vortex type vibration; when the vibration track of the vibrating body is projected as a circle or ellipse on the vertical plane, its vibration form is called compound-rotation type vibration. Rotary vibration is usually generated by the vibration equipment excited by the vertical vibration motor, and the vibration form depends on the angle between the vibration blocks at both ends of the vertical vibration motor. It is also possible to install two foot-mounted vibration motors on both sides of the vibration device, so that the rotating shaft is at a set angle, and the vibration device will also produce rotational vibration.

3. Compound vibration

The vibration of the vibrating body is produced by two sets of excitation systems, and its vibration form is called compound vibration. There are generally two types of dual-frequency compound type and double-amplitude compound type. Some special performance vibrating screening equipment uses two vibration motors of different models and different speeds, which are installed at the receiving end and the discharge end of the screening equipment, so that the receiving end exhibits large amplitude and low frequency vibration, and the output The material end presents a small amplitude and high frequency vibration, and the middle of the screening equipment overlaps two kinds of vibrations, so that the screening equipment plays a more effective screening role.

4. Circular or elliptical vibration

Ukuqagela kwethrafikhi yokudlidliza komzimba odlidlizayo endizeni evundlile kungumugqa oqondile, futhi ukuqagela endizeni mpo kuyisiyingi noma i-ellipse, nefomu lalo lokudlidliza libizwa ngokuthi yindilinga noma i-ellipse vibration. Lolu hlobo lwesikrini esidlidlizayo lubizwa ngokuthi yisiyingi sokudlidliza okuyindilinga noma isihenqo sokudlikiza esiyindilinga. Imvamisa kufakwa imoto yokudlidliza emzimbeni womshini odlidlizelayo ukukhiqiza lolu hlobo lokuhamba. Ukudlidliza okuyindilinga noma okuyindilinga kwenzeka endizeni ngokungafani ngqo ne-eksisi yokuzungezisa yemoto yokudlidliza, futhi isimo saso sincike esimweni esihambisanayo semoto yokudlidliza kanye nendawo yamandla adonsela phansi yomshini wonke.

Ungayilungisa kanjani imvamisa yokudlidliza kwesikrini esidlidlizelayo

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Njengoba sonke sazi, ukusebenza kwesikrini esidlidlizayo akuhlukaniswa nenjini yokudlidliza. Isikrini esidlidlizayo siqhutshwa yimoto yokudlidliza. Imvamisa yokudlidliza incike esivinini semoto yokudlidliza. Ijubane lesikrini esidlidlizelayo liyancipha, noma isilinganiso sokunciphisa sohlelo lokudlulisa siyakhuphuka. Okukhulu, kunganciphisa imvamisa yokudlidliza kwesikrini esidlidlizayo. Ngokufanayo, ngokwandisa ijubane lokujikeleza kwemoto edlidlizayo noma ukwandisa isilinganiso sokusheshisa kohlelo lokudlulisa, imvamisa yokudlidliza kwesikrini sokudlidliza komugqa ingandiswa.

Izinyathelo ezithile zokusebenza: Vula ikhava yokuphela ekugcineni komshini wokudlidliza esikrinini esidlidlizayo. Kukhona i-cam ngaphakathi nesikali ngaphezulu. Imvamisa ingatholakala ngokulungisa inani lamakhamera.

There are many different classification methods for vibrating screens. For example, according to the movement trajectory, there are linear screens, circular screens and high frequency screens. So no matter what kind of vibrating screen, you have to buy it back. If we encounter the problem of slow discharge, how can we solve it?

The vibrating screen is a machine that uses a vibration exciter or a vibrating motor to drive the screen surface to perform high-frequency vibration, so as to screen materials and have the characteristics of high precision and high efficiency.

The vibrating screen discharges slowly or does not discharge, I believe most users have encountered it, so many users first feel that this is a problem with the machine, it must be designed by the manufacturer without designing, and in fact, this phenomenon is very common, and There are very easy to solve problems, because the root cause of these problems is the vibration source of the vibrating screen.

It is not difficult to find the root cause, and then solve the problem of slower discharge of the vibrating screen, that is, adjust the weight of the upper and lower ends of the vibrating motor. You can start from two aspects:

1. Increase the weight of two weights: increasing the weight of the eccentric mass can increase the excitation force of the entire machine. Users can increase the weight according to the number of layers of the vibrating screen and the specific gravity of the material, so the vibrating screen and the material can achieve the desired ideal effect.

2. Change the angle between the upper and lower weights: the angle of the weight changes, the movement trajectory and residence time of the material on the screen will change. The larger the angle, the smaller the eccentric force generated, and the longer the material is on the screen. The finer the screen, the slower the discharge speed. Conversely, the smaller the angle, the greater the eccentricity, and the shorter the residence time of the material. Accordingly, the discharge speed will increase. This type of adjustment is more suitable for coarse drying and screening of larger particles. Therefore, the user should adjust the angle between the two weights according to the nature of the material to be screened, so that the distribution of the material, the processing capacity and the super-netting speed can reach the ideal screening state.

Lapho kukhiqizwa futhi kwaklanywa uhlobo olufanayo lwesikrini esidlidlizelayo, ukulungiselelwa kuyanqunywa. Izinto ezehlukene zidinga izindlela zokulungisa ezihlukile. Abasebenzisi bangalungisa i-angle yesando ngokuya ngezidingo zabo. Isikrini esidlidlizayo sisesimweni esikahle sokusebenza.

Izinkinga ezivamile nezixazululo zesikrini sokudlidliza esivusa amadlingozi

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Imishini yokuhlola iyisetshenziswa esibalulekile esisizayo ezimayini, izinto zokwakha, izimboni zamakhemikhali nezinye izimboni. Ukusebenza kwayo kuthinta ngqo amandla wokukhiqiza nezinkomba zobuchwepheshe nezomnotho. Ngakho-ke, kudingekile kakhulu ukuqonda okunye ukuxilongwa kwephutha okuvamile nezixazululo zezikrini zokudlidliza ekusebenzeni komkhiqizo. Le ndatshana yabelana ngezinkinga ezijwayelekile zezidlidlizi zesikrini esidlidlizelayo, izizathu eziyinhloko nezixazululo zokuqhekeka nokusonteka kohlaka lwesikrini namapuleti ohlangothini.

The exciter is the vibration source of the screen body. The amplitude can be adjusted by the counterweight. When the exciter is working, the centrifugal force generated by the eccentric mass is selected as the exciting force. When the biaxial exciter rotates synchronously, The screen box performs reciprocating linear vibration, and the materials are screened through the gap of the drying surface, and then the screening work of the product mine is completed.

The failure of vibrating screen exciter generally has the following situations:

FE (HE) Uchungechunge Isixwa Screen Exciter

1. Start under heavy load

Sudden shutdown due to production or other equipment failures makes the screen box full of minerals. If the exciter starts again under heavy load, it is very easy to cause damage to the universal coupling and other parts of the exciter.

Isixazululo: Gwema ukuqala kabusha isikrini esidlidlizayo ngaphansi komthwalo osindayo.

2. Ukulimala kohlelo lokumosha

Uma intwasahlobo yedamping yehluleka noma okokusebenza okuningi ngaphansi kwesikrini, njll., Uhlelo lokudampaza ngeke ludidiyelwe futhi lubangele ukulimala kokudlidliza.

Isixazululo: Bheka intwasahlobo edamping njalo, bese ushintsha iziphethu ezihlulekayo nezikhubazeke ngesikhathi. Lapho ufaka okunye esikhundleni sazo zonke iziphethu ezinomswakamo ngasikhathi sinye ngangokunokwenzeka, futhi uqinisekise ukuthi ukuqina kweqembu ngalinye lemithombo ngaphambi nangemva kokufaka okunye kuyafana.

Ngokufingqa, kunezinkinga ezimbili ezivamile ezinezixhumi zesikrini esidlidlizayo nezixazululo ezihambisanayo. Isidlidlizi sesikrini esidlidlizelayo kufanele silandele ngokuqinile imiyalo yokusebenza ehambisanayo ngesikhathi sokufaka nokusetshenziswa kwenqubo ukuqinisekisa ukusebenza ngokuphepha kwemishini.