LHB-D Series Hydraulic Elevator Oil Buffer Manufacturers

Industry Knowledge: LHB-D Series Hydraulic Elevator Oil Buffer

1. LHB-D Series Hydraulic Elevator Oil Buffer Technical Specifications

The LHB-D series hydraulic elevator oil buffer is a critical safety component designed to absorb impact energy and ensure smooth deceleration. Below are the detailed technical specifications for different models in the series:

Note: All dimensions are in millimeters (mm), mass in kilograms (kg), speed in meters per second (m/s), force in kilonewtons (kN), time in seconds (s), and oil volume in liters (L). These specifications are for reference only and may be subject to change based on specific requirements.

2. The Core of Elevator Safety: Working Principle and Performance Parameters

As the final line of defense in an elevator system, the hydraulic oil buffer is critical for passenger safety. This component absorbs the kinetic energy of an over-speeding car or counterweight by converting it into thermal energy within hydraulic fluid, ensuring a smooth, controlled deceleration. The LHB-D series utilizes advanced orifice technology to generate a retarding force proportional to the square of the impact velocity.

Key Performance Parameters:

• Effective Buffering Mass: The range of mass for which the buffer can safely absorb energy
• Stroke: The maximum compression distance of the piston rod
• Maximum Impact Velocity: The highest impact speed the buffer can withstand (≤ 2.0 m/s)
• Maximum Reaction Force: The peak force generated during buffering
• Reset Time: The time required for the piston rod to automatically return to its initial position (≤ 90s)

Company Context: Founded in 2004, Shanghai Liftech Elevator Accessories Co., Ltd. has specialized in the R&D and manufacturing of elevator safety components for nearly two decades. With this profound expertise, Liftech has a deep understanding of hydraulic buffer mechanics. The LHB-D series adheres strictly to these parameters, ensuring it provides ultimate safety and reliability for elevator systems worldwide.

3. How to Select the Right Model? Matching Guide for LHB-D Series

The correct selection of an oil buffer is paramount for an elevator's safety and compliance. This guide provides a practical framework for choosing the appropriate model from the LHB-D series based on the elevator's rated speed and total mass (car weight + rated load).

Selection Criteria:

• Elevator Rated Speed: Primary factor in determining required buffer stroke
• Elevator Total Mass: Sum of car's self-weight and maximum rated load
• Calculated Kinetic Energy: Energy the buffer must absorb (E = 1/2 * m * v²)
• Effective Buffering Mass Range: Must match elevator's total mass
• Available Pit Space: Determines maximum allowable buffer height

Company Context: As a manufacturer providing solutions to major global elevator brands, Shanghai Liftech Elevator Accessories Co., Ltd. offers expert technical support, performing precise selection calculations and offering customized recommendations based on specific project parameters to ensure every application is both safe and compliant.

4. Installation and Maintenance Best Practices

Proper installation and maintenance are crucial for the optimal performance of LHB-D series hydraulic buffers. These components require careful attention to ensure long-term reliability and safety compliance.

Installation Requirements:

• Vertical Alignment: Must be installed with deviation less than 1 mm/m
• Foundation Strength: Concrete foundation must withstand maximum reaction forces
• Center Alignment: Piston rod center must align with elevator car/counterweight center
• Secure Mounting: Use appropriate anchor bolts and torque specifications

Maintenance Guidelines:

• Quarterly Inspections: Visual checks for oil leaks and damage
• Oil Level Checks: Verify oil level is within specified range
• Oil Change Interval: Recommended every 3-5 years based on usage
• Reset Time Verification: Ensure reset time remains ≤ 90 seconds

Company Context: Shanghai Liftech Elevator Accessories Co., Ltd. provides comprehensive installation manuals and maintenance guidelines for the LHB-D series. With 20 years of market experience, Liftech offers professional training and after-sales support to maximize product value and ensure safe operation throughout the product lifecycle.

Frequently Asked Questions (FAQ)

What is the difference between a hydraulic oil buffer and a spring buffer?

The primary difference lies in their deceleration characteristics. A hydraulic oil buffer, like the LHB-D series, provides smooth, constant deceleration by converting kinetic energy to heat, making it ideal for passenger elevators. A spring buffer stores energy mechanically, resulting in abrupt deceleration suitable only for low-speed freight elevators. Hydraulic buffers offer superior safety and comfort, making them the standard for modern passenger elevators.

How often should an elevator hydraulic buffer be serviced?

Service frequency depends on usage and manufacturer guidelines. Routine checks (visual inspection, oil level) should be performed quarterly. Periodic maintenance (oil change) is recommended every 3-5 years. Always consult the LHB-D series maintenance manual from Shanghai Liftech for specific requirements to ensure optimal performance and safety compliance.

What does "effective buffering mass" mean for an LHB-D series buffer?

"Effective buffering mass" defines the safe operating range of a hydraulic buffer. It specifies the minimum and maximum mass the buffer can safely stop. For example, LHB-D200 (800-4000 kg) can only safely stop elevators within this mass range. Selecting a buffer with the correct effective mass range is fundamental for safety and regulatory compliance in elevator installations.