Targeted preventive measures should be taken for electric winches at different stages of use to ensure safe operation and extend equipment life. Specifically, they can be divided into installation and commissioning stage, daily operation stage, maintenance stage, and long-term shutdown stage. The following is a detailed explanation:

Installation and debugging phase

Foundation reinforcement: The equipment installation foundation must be flat and solid, with a tilt angle of no more than 0.5 °. Otherwise, shock absorbers or leg heights need to be added to prevent displacement during operation.

Electrical system inspection: Ensure that the power cord, controller, and remote control (if any) are intact, without damage or aging; Test whether the emergency stop button and safety interlock device are sensitive.

Mechanical component debugging: Adjust key components such as brake belts, bearings, gears, etc. to ensure that the brake device is flexible and reliable, and that the clearance between the brake wheel and brake shoe meets the standard (usually 1-2mm); Check whether the steel wire rope or synthetic rope is broken, worn or twisted, and whether the fixed end is firm and reliable.

Daily operation phase

Load control:

Overloading is strictly prohibited, and the load weight must not exceed 80% of the rated load of the winch to avoid prolonged full load operation.

Uniform loading, slow start and stop when lifting or lowering loads to avoid sudden acceleration or braking that may cause impact loads.

Speed management:

Start at low speed, run at low speed (such as 30% of rated speed) for 1-2 minutes, and then accelerate to working speed after the equipment is preheated.

Graded speed regulation, achieved through a frequency converter or controller to achieve stepless speed regulation, avoiding mechanical wear caused by frequent gear switching.

Operation monitoring:

Pay close attention to instruments such as ammeters, oil pressure gauges, and depth indicators. If the pointer swings violently or shows abnormal values (such as current exceeding the set value by 20%), immediately stop the vehicle for inspection.

If you hear abnormal noises, smell strange odors, or find that the ropes are arranged haphazardly, immediately stop the car and troubleshoot; In case of emergency (such as sudden power outage), emergency braking can be used, but a comprehensive inspection of the equipment is required afterwards.

Maintenance phase

Monthly maintenance:

Lubrication and maintenance: Add lithium based grease (such as No.2 lithium based grease) to the motor bearings every 3 months, with an amount not exceeding 2/3 of the bearing chamber; Replace the gear oil (such as N220 industrial gear oil) of the reducer every 6 months, with the oil level between the upper and lower limits of the oil gauge; Apply steel wire rope lubricating grease (such as calcium based grease) to reduce wear and corrosion.

Component tightening: Check and tighten all bolts and nuts, especially key connection parts such as motor base and reducer bracket, with torque that meets design requirements (such as M16 bolt torque of 180-220N · m).

Braking system: Adjust the brake clearance to ensure that the contact area between the brake shoe and the brake wheel is not less than 70%; Clean the brake oil circuit and replace the aging sealing ring.

Annual maintenance:

Comprehensive disassembly and inspection: Disassemble core components such as motors, reducers, and brakes, check gear wear, bearing clearance, and brake pad thickness (the remaining thickness of the brake pads must not be less than 50% of the original thickness).

Load test: Conduct a static load test at 1.25 times the rated load and a dynamic load test at 1.1 times the rated load for 10 minutes without any abnormalities before continuing to use.

Anti corrosion treatment: Remove rust from metal components (such as rollers and brackets) and apply anti rust paint (such as epoxy zinc rich primer+polyurethane topcoat) with a thickness of not less than 80 μ m.

Long term disuse phase

Cleaning: Thoroughly clean the inside and outside of the equipment, remove dust, dirt, etc., and avoid corrosion or blockage.

Lubrication: Properly lubricate all moving parts, use specified types of grease, add lubricating oil to each shaft, and fill the surface of the screw and guide rail with lubricating oil.

Anti corrosion protection: For parts that are prone to moisture, such as metal surfaces, apply anti rust oil or use other anti-corrosion measures; For large equipment, desiccants or other methods can be used to control environmental humidity.

Closed isolation: Enclose the internal space of the equipment, such as installing blind plates to separate the process pipelines connected to the outside, to prevent moisture from entering and causing corrosion.

Storage conditions: Choose a dry and ventilated indoor location for storage. If stored outdoors, additional protective measures should be taken, such as covering with waterproof materials.

Regular inspection: Even during downtime, equipment should be inspected at a certain frequency (such as once every quarter) to monitor its status and promptly identify potential issues.

Power cut-off: Ensure that all power supply is safely cut off and take measures to avoid accidental power on.

Battery maintenance: If the device includes a battery pack, it needs to be charged regularly (usually every few months) to maintain battery health.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment