The secret of elevator maintenance in dry and windy environment
In the dry and windy environment, the maintenance of elevators needs to develop special measures for dust wear, component aging, electrical faults and other problems. The following are the key maintenance secrets:
1. Strengthen dustproof sealing to block the invasion of sand and dust
Strengthen the door seal
Check the sealing strip of the floor door and elevator door regularly, replace the aging and damaged sealing strip in time, ensure that the door is closed without gap, and reduce the entry of sand and dust into the elevator car and shaft.
Dust-proof brushes or elastic dust-proof plates shall be installed in the gap between the floor sill of the floor door and the floor sill of the elevator door to prevent sand and dust accumulation.
Protection of key components
Install dust cover or sealing ring on elevator control cabinet, frequency converter, relay and other electrical equipment to prevent sand and dust from entering to cause short circuit or poor contact.
The connection gap of mechanical parts such as guide rail bracket and guide boot is filled with dustproof sealant to reduce the deposition of sand and dust.
2. high frequency cleaning, reduce dust accumulation
Deep cleaning of mechanical parts
Guide rail and guide shoe: Clean the surface of the guide rail and the dust in the guide groove with a soft brush or vacuum cleaner every week to avoid wear of the guide rail and guide shoe lining by dust particles. After cleaning, apply special guide rail oil with high viscosity and anti-dust (such as grease containing molybdenum disulfide) to form a dustproof lubricating film.
Steel wire rope: wipe the surface of the steel wire rope with a dry cloth regularly to remove the attached sand particles and prevent the dust from accelerating the wear between the rope strands; replenish the special lubricating grease for the steel wire rope every quarter to ensure that the oil penetrates to the internal fiber.
Floor sill and door machine: clean the sand and dust in the floor sill trough with a vacuum cleaner every day to avoid jamming when the door machine runs; check whether the gear and pulley of the door machine are accumulated with sand, clean and lubricate them in time.
Dust removal from electrical systems
Use compressed air (low pressure) to blow dust from control cabinets, button panels, sensors and other components every month to avoid sand covering circuit boards or contact points, resulting in signal transmission faults or component overheating.
Do not use wet cloth to clean, to prevent sand and dust from clumping together when water is encountered to aggravate blockage.
3. Optimize lubrication and component maintenance
Select suitable lubricants
Priority should be given to the use of lubrication products that are resistant to drying and dust, such as lithium-based grease (for guide rails and guide boots) and high temperature anti-wear lubricating oil (for bearings and chains), so as to reduce dust absorption and lubrication failure.
Shorten the lubrication cycle: lubricate once every quarter in normal environment, and check and replenish grease monthly in windy and sandy environment.
Focus on checking vulnerable parts
Guide shoe lining and roller: Dust will accelerate its wear. Measure the wear amount each time of maintenance (such as replace the guide shoe lining when the thickness is less than 3mm) to avoid the shaking of the car due to excessive gap.
Rubber parts: such as door machine buffer glue, cable sheath, which are prone to aging and cracking in dry environment. Check the elasticity and integrity every month and replace them in time.
Steel wire rope guide wheel and counter rope wheel: check whether the bearing is stuck, whether it rotates smoothly, and disassemble, clean and lubricate it again if necessary.
4. Machine room and environment control
Data center dust control management
Install high-efficiency dust-proof nets at the ventilation outlets of the machine room, clean or replace them regularly to keep the air cleanliness of the machine room; doors and Windows are tightly sealed to prevent irrelevant dust from entering.
Dust-proof mats are laid on the floor of the machine room to reduce the dust brought in by personnel entering and leaving.
temperature and humidity supervision
The dry environment is easy to lead to the accumulation of static electricity in electrical components. A humidifier (humidity maintained at 40%-60%) can be installed in the machine room, or anti-static dust removal equipment can be placed in the control cabinet.
5. Shorten the maintenance cycle and strengthen inspection
Increase the frequency of encryption
Shorten the routine maintenance cycle from once a month to once every two weeks, focusing on dust seal, lubrication status and component wear.
After sandstorm or extreme weather, increase temporary inspection and clean up the sudden accumulation of dust (such as the top of the ground sill and guide rail).
Establish special maintenance records
Record the amount of dust, lubrication time and component replacement for each cleaning. Track the wear trend through data and replace vulnerable parts in advance (such as guide boot lining every six months).
6. Personnel training and emergency handling
Operation and inspection training
Special training should be given to the elevator manager to master the daily cleaning methods (such as prohibiting high-pressure water flushing of the shaft) and abnormal identification (such as abnormal running sound and door jam) in the dust environment.
Make an emergency plan for sand and dust weather. In case of a strong sandstorm, it is recommended to temporarily stop the operation of elevators and close the floor doors to reduce sand and dust intrusion.
Key points of emergency treatment
If the elevator stops due to sand and dust, do not start it forcibly. After power is cut off, manually clean the sand and dust in the sill or guide rail, and then run it after confirming that there is no blockage.