What items need to be checked during the no-load debugging of conveying machinery?

No-load debugging of conveying machinery is the core link to verify the assembly accuracy, operation stability and safety protection effectiveness of equipment, and it needs to be checked item by item in the order of static inspection → inching trial operation → continuous no-load operation. The specific inspection items are as follows:

Static pre-inspection (before commissioning)

Fastenability of components: check the bolts of the frame, roller, bearing seat and motor reducer, and tighten them according to the specified torque and install check washer, without looseness or missing; The fasteners of the hopper and conveyor belt joint are not falling off.

Coaxiality of transmission system: use a dial indicator to detect the coaxiality deviation of motor, reducer and spindle, which should be ≤ 0.1 mm; The compensation clearance of the coupling meets the requirements (0.5~1mm), and there is no rigid binding.

Running clearance: the clearance between hopper and guide rail of bucket elevator is even (one side ≤ 5 mm); The clearance between the blades of the spiral hoist and the inner wall of the barrel is consistent (5 ~ 10 mm); The idler of the belt conveyor is closely attached to the conveyor belt without hanging.

Lubrication and sealing: the filling amount of lubricating oil (grease) in bearings, sprockets, gear boxes and other parts reaches the standard without leakage; The seal is undamaged to prevent dust from entering the transmission parts.

Safety protection and electricity: protective cover and fence are installed in place; Sensors such as emergency stop button, deviation switch and overload protection are sensitive; The grounding resistance of the motor is ≤4Ω, and the power cord is not damaged or wound.

Manual turning test: manually turn the equipment for 2~3 turns, without jamming and abnormal sound, and the running direction is consistent with the logo.

Inching test run inspection

Verification of running direction: inching the motor once (power-on time ≤3 seconds), confirm that the running direction of conveyor belt, hopper and spiral blade is consistent with the design, and it is forbidden to reverse.

Deviation and jitter detection: observe whether the conveyor belt and chain deviate, and the distance deviation between the belt edge and the side baffle of the frame is ≤ 10 mm; The hopper runs without swinging or colliding with the frame; Spiral blades have no abnormal noise during bore sweeping.

Coordination of component actions: the tensioning device and the deflection adjusting device can be adjusted flexibly; The coupling rotates smoothly without eccentric shaking; The rollers and rollers rotate without sticking.

Continuous no-load running inspection (running time ≥2~4 hours)

Operation stability: the equipment has no obvious vibration and abnormal sound, and the frame amplitude is ≤ 0.5 mm; Conveyor belt and chain run smoothly without periodic jitter.

Temperature monitoring: bearing temperature ≤70℃, temperature rise ≤40℃ (difference from ambient temperature); The shell temperature of motor and reducer is ≤65℃, and there is no overheating and burning.

Current monitoring: the no-load current of the motor is ≤ 60% of the rated current, and the current is stable without fluctuation and overload alarm.

Noise detection: The operating noise of the equipment is ≤85dB (measured at a distance of 1m from the equipment), and there is no sharp rubbing sound or impact sound.

Safety protection test: manually trigger the deviation switch and emergency stop button, and the equipment needs to be stopped immediately; The set value of overload protection device is reasonable, and it can be reliably powered off after triggering.

Tension recheck: After running for 1 hour, check the tension of conveyor belt and chain again, and there is no looseness or slippage. If necessary, fine-tune the tensioner.

Rectification and record after commissioning

Timely adjust problems such as deviation, abnormal sound and abnormal temperature, such as adjusting the position of the roller, supplementing lubrication and fastening loose parts.

Record the no-load running data (current, temperature, noise and running time) in detail, and form a debugging report as a reference for subsequent load debugging.