welcome to Luoyang Yuanjian Mining Equipment Co., Ltd. !

Luoyang Yuanjian Mining Equipment Co., Ltd.

Quick consultation hotline0379-69581006 0379-69927723

Encyclopedias

Luoyang Yuanjian Mining Equipment Co., Ltd.

Hotline:

0379-69581006

Luoyang Yuanjian Mining Equipment Co., Ltd.

Fixed line:0379-69581006

Fax:0379-69927723

ADDRESS:Plant area: Delong Community Industrial Park, Pengbo Town, Yichuan County, Luoyang, Henan Luoyang Office: No.236, Mudan Avenue, Luolong District, Luoyang City

Busline:Plant area: take bus No.62, 63 and 65 to Guozhai, then transfer No.6 to Delong Community Industrial Park, Pengbo town

Encyclopedias
LOCATION:HOME - DYNAMIC > Encyclopedias

16 common faults and solutions of coal mine scraper!

Published:2019-05-29Author:Click:943

The scraper conveyor for coal mine is used as the transportation equipment of coal mine working face. It not only bears the role of coal transportation, but also the running track of the coal mining machine and the fulcrum of the hydraulic support.

The reliable, stable and efficient operation of the scraper conveyor will directly affect the production capacity of the mine and the economic benefits of the coal mine enterprises.

640.webp.jpg


  1.The motor does not start or stops slowly after starting

  Causes of the fault:the power supply voltage is too low;the load is too large;the contact is faulty;the operation procedure is incorrect.

  Treatment methods:increase the power supply voltage;reduce the load,remove part of the coal in the tank;check the relay;check the operating procedures.

  2.The motor heats up

  The cause of the failure:too frequent start-up;too long time for overloading;poor heat dissipation of the motor;bearing lack of oil or damage.

  Treatment method:reduce the number of start-ups and restart after the failure of each part is eliminated;reduce the load and shorten the overload operation time;check whether the cooling water of the motor is smooth,adjust the water pressure to reach the required value,and eliminate the floating coal and debris on the motor;Lubricate the bearings or replace them.

  3.The sound of the motor is abnormal

  Causes of failure:single-phase operation;loose wiring head.

  Treatment method:check the single-phase reason;check the binding post.

  4.Oil leakage and abnormal vibration of the reducer

  Causes of failure:damaged sealing ring;loose upper and lower case joints,inadequate pressure on each end cover,gear and bearing failure

  Treatment method:replace the damaged sealing ring;tighten the bolts of the box and end cover,and it is strictly forbidden to add pads on the face of the box,and then manufacture gears and bearings.

  5.Torque cannot be transmitted when the hydraulic coupling is fully loaded

  Cause of failure:insufficient oil charge of hydraulic coupling.

  Treatment method:Inject the specified amount of working oil.


640.webp (1).jpg


  6.The sound of the reducer is abnormal

  Causes of failure:poor gear meshing;severely worn gears or broken teeth;severely worn or damaged bearings;adhesions on tooth surfaces;debris in the box;bearing clearance is too large.

  Treatment methods:adjust the gear meshing situation;replace the new gear;replace the bearing;check and clear;drain to clean;adjust the bearing clearance.

  7.The temperature of the reducer is too high

  Reasons for failure:Lubricating oil is not clean;lubricating oil is not qualified;too much oil is injected;heat dissipation conditions are not good.

  Treatment methods:clean and replace with new oil;replace with new oil;release excess lubricating oil;remove floating coal and debris on the reducer box.

  8.The temperature of the sprocket shaft group is too high

  Cause of failure:Insufficient lubrication of oil;damaged bearings and sprockets.

  Treatment method:add enough lubricating oil as required;replace the bearing and remanufacture the sprocket.

  9.Scraper chain jump chain or drop chain

  Causes of failure:the chain is stuck in metal;the squeegee chain is too loose.

  Treatment method:clean the metal in the chain;re-tighten the chain.

  10.Scraper chain vibration is serious

  Cause of failure:The preload of the scraper chain is too high.

  Treatment method:relax the chain.

  11.The scraper chain is off track

  Cause of failure:The pretension of the slack chain is too large.

  Treatment method:tight chain.

  12.The fusible protection plug of the hydraulic coupling melts the fuel injection

  Cause of failure:The transfer machine is not running smoothly or the scraper chain is stuck,which makes the coupling slip rate too large,causing the coupling temperature to exceed the specified temperature.

  Treatment method:eliminate a fault or remove obstacles;remove any protrusions in the connection cover that hinder the rotation of the hydraulic coupling,and replace the fusible protective oil plug.

  13.The hydraulic coupling heats up

  Cause:The ventilation hole of the connection cover is not smooth;the slip rate is too large if the oil charge is insufficient.

  Treatment method:clean the ventilation holes of the coupling hood;inject the specified amount of working oil.

  14.Overheating of the reducer housing

  Causes of failure:too much or too little oil in the reducer;long-term use of lubricating oil;damaged bearings;unclean interior of the reducer.

  Treatment methods:Check the amount of oil injection;clean the inside of the reducer and inject new oil;replace the damaged bearings;clean the inside of the reducer.

  15.Scraper chain is suddenly stuck

  Cause of the fault:There is a foreign object on the transfer machine;the scraper jumps out of the tank.

  Treatment methods:clean up foreign objects;deal with the scraper that jumps out.

  16.Scraper chain jumps teeth at the sprocket

  Causes of the failure:the chain is too loose;there are twisted chain segments;the length or elongation of the double-stranded chain is not equal or the number of rings is different;the scraper is deformed too much.

  Treatment method:re-tension and shorten the scraper chain;re-install the twisted chain segment correctly;check the length and elongation of the chain(elongation should not be greater than 2%).Odd ring chain;replace the severely deformed scraper.


ADDRESS:Plant area: Delong Community Industrial Park, Pengbo Town, Yichuan County, Luoyang, Henan Luoyang Office: No.236, Mudan Avenue, Luolong District, Luoyang City
BUSSLINE:Plant area: take bus No.62, 63 and 65 to Guozhai, then transfer No.6 to Delong Community Industrial Park, Pengbo town

Luoyang Yuanjian Mining Equipment Co., Ltd.

24-HOUR HOTLINE0379-69581006