Elevator Polyurethane Buffer LD-HC-L1/L2/L3/L4/L6/L7: Safety Buffer Core from Nanjing Zhuye Elevatorparts

Step-by-Step Usage Guide for Elevator Polyurethane Buffer LD-HC-L1/L2/L3/L4/L6/L7

1. Professional Installation & Positioning

• Safety Preparation: Cut off the elevator’s main power supply and fix the elevator car and counterweight to safe positions using safety clamps to avoid accidental movement. Clean the buffer mounting area (bottom pit or top beam of the shaft) to remove dust, debris, and oil stains that may affect installation accuracy and buffer performance.
• Buffer Installation: Fix the LD-HC Series buffer to the dedicated mounting base in the shaft using high-strength bolts provided by Nanjing Zhuye Elevatorparts. Ensure the buffer is installed vertically (verticality error ≤ 2°) and the top surface is level. Confirm that the distance between the buffer top and the elevator car/counterweight buffer plate meets the standard requirement (150–400mm, adjusted according to elevator model and height). Tighten the fixing bolts with a torque wrench to ensure firm installation without looseness.
• Post-Installation Calibration: After installation, remove the safety clamps and switch the elevator to inspection mode. Operate the car and counterweight to slowly approach the buffer until they lightly touch the buffer top, verifying that the buffer is correctly positioned and there is no deviation. Check the buffer’s compression and rebound performance—ensure it rebounds quickly and smoothly without jamming after being compressed.
• Safety Test: Conduct a simulated overtravel test (under professional guidance) to verify that the buffer effectively absorbs impact energy when subjected to rated load impact. Confirm that the elevator’s safety protection system (e.g., overspeed governor) coordinates with the buffer to achieve a safe stop. If there is abnormal buffer compression, slow rebound, or incorrect positioning, recheck the installation immediately.

2. Daily Operation & Routine Inspection

• Daily Visual Inspection: During shaft pit and top beam inspections, check the external condition of the LD-HC Series buffer. Ensure the polyurethane buffer body is free of cracks, deformation, aging (e.g., hardening, brittleness), or oil stains; the steel base is free of corrosion, deformation, or loose fixing bolts; the buffer top surface is clean and free of debris that may affect impact absorption.
• Weekly Distance Check: Use a tape measure to check the distance between the buffer top and the car/counterweight buffer plate, ensuring it remains within the standard range (150–400mm). If the distance changes due to elevator operation or component wear, adjust it in a timely manner.
• Monthly Performance Spot-Check: Manually press the buffer top with a tool to check its compression and rebound performance. Ensure there is no abnormal noise during compression, and the rebound is rapid and stable. For elevators in high-traffic areas, increase the spot-check frequency to twice a month.

3. Regular Maintenance Schedule

• Quarterly Maintenance: Clean the buffer body, steel base, and mounting area with a dry, lint-free cloth or a professional cleaner (avoid using corrosive cleaning agents). Inspect the polyurethane material for signs of aging (e.g., color fading, surface cracking) and the steel base for corrosion. Tighten any loose fixing bolts and apply anti-corrosion paint to the steel base if necessary.
• Semi-Annual Performance Test: Conduct a comprehensive performance test, including compression stroke, rebound time, and impact absorption capacity. Use professional testing equipment to simulate impact under 50% and 100% rated load, verifying that the buffer’s performance meets the original factory standards. For elevators in harsh environments (high humidity, high temperature), increase the test frequency to once every 3 months.
• Annual Professional Overhaul: Arrange a professional inspection with Nanjing Zhuye Elevatorparts’ certified technical team. Check the buffer’s internal structure (if applicable) and replace aging or damaged components with genuine parts. Recalibrate the distance between the buffer and the car/counterweight to meet the elevator’s actual operating requirements and safety standards.

Recommended Replacement Cycle for Elevator Polyurethane Buffer LD-HC-L1/L2/L3/L4/L6/L7

1. Standard Replacement Cycle

2. Adjustments for Special Scenarios

• Harsh Environments: For elevators in high-humidity coastal areas (salt spray corrosion), high-dust construction sites, or shafts with large temperature fluctuations (e.g., unheated industrial buildings), the replacement cycle should be shortened to 3–5 years. Harsh conditions accelerate the aging of polyurethane materials and corrosion of steel bases, significantly reducing the buffer’s reliability.
• Low-Frequency Use Scenarios: For elevators with low usage frequency (e.g., villa elevators, small office buildings with daily operation time < 8 hours) and stable shaft environments, the replacement cycle can be extended to 7–8 years—only if Nanjing Zhuye’s professional inspection confirms the buffer’s impact absorption performance, rebound resilience, and structural integrity are intact.

3. Immediate Replacement Conditions

• The polyurethane buffer body has obvious cracks, deformation, or severe aging (hardening, brittleness, or fragmentation), resulting in reduced compression and rebound performance.
• The buffer’s compression stroke exceeds the maximum allowable range specified by the standard, or it fails to rebound to the original position after compression, affecting normal buffering function.
• The steel base is severely corroded or deformed, and the fixing bolts are loose or damaged, posing risks of buffer displacement during impact.
• The buffer fails to pass the performance test (impact absorption capacity is less than 80% of the original factory standard), and the fault cannot be eliminated through maintenance.