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Common faults and troubleshooting methods of sealed hammer crusher

by:ORK      2022-11-15
In coal testing, the correctness of sample preparation and crushing directly determines the accuracy of the test results, so the maintenance and repair of coal sample preparation and crushing equipment is particularly important. Easy-to-occur faults and troubleshooting phenomena: The discharge granularity is too large. Reasons: 1) The hammer head is worn too much; 2) The screen bar is broken. Remedy: 1) Replace the hammer head; 2) Replace the screen bar. Fault phenomenon: bearing overheating. Reasons: 1) Insufficient grease; 2) Too much grease; 3) The grease is dirty and deteriorated; 4) The bearing is damaged. Elimination method: 1) Add appropriate amount of grease; 2) The grease in the bearing should be 50% of its space volume. 3) Clean the bearing and replace the grease. 4) Replace the bearing. Fault phenomenon: The elastic coupling produces a knocking sound. Reason: 1) The pin is loose; 2) The elastic ring is worn; Remedy: 1) Stop and tighten the pin nut; 2) Replace the elastic ring. Fault phenomenon: There is a knocking sound inside the machine. Reasons: 1) Non-broken objects enter the inside of the machine; 2) The fasteners of the lining plate are loosened, and the hammer hits the lining plate; 3) The hammer or other parts break. Remedy: 1) Stop and clean the crushing chamber; 2) Check the fastening of the lining plate and the gap between the hammer and the screen; 3) Replace the broken parts. Fault phenomenon: the output is reduced. Reasons: 1) The screen bar gap is blocked; 2) The feeding is uneven. Elimination method: 1) Stop the machine and clear the blockage in the screen gap; 2) Adjust the feeding mechanism. Fault phenomenon: sudden vibration. Reasons: 1) The static balance of the rotor is unsatisfactory when the hammer head is replaced or due to the wear of the cone head; 2) The hammer head is broken and the rotor is out of balance; 3) The pin shaft is bent and broken; 4) The triangular disc or disc is cracked; 5) Ground The foot bolts are loose. Remedy: 1) Remove the hammer head and select the hammer head according to the weight, so that the total weight of the hammer on each hammer shaft is equal to the total weight of the hammer on the opposite hammer shaft, that is, the static balance meets the requirements; 2) Replace the hammer head; 3 ) Replace the pin; 4) Repair or replace by electric welding; 5) Tighten the anchor bolt. Company website:
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