Laminated Membrane Couplings

The laminated membrane coupling is a high-performance metal elastic element flexible coupling, consisting of a membrane group composed of multiple layers of stainless steel thin plates stacked together and connected by bolts in a staggered manner. The core principle is to compensate for axial, radial, and angular deviations between two axes through the elastic deformation of the diaphragm (with a compensation capability of up to 1.5 ° angular displacement), achieving seamless torque transmission.

Typical structures are divided into:

1. Single membrane type: suitable for low eccentricity scenarios, with a simple structure but limited compensation capability.
   

2. Double membrane type: By synergistically deforming two sets of membranes, it can simultaneously handle multi-directional deviations and has stronger compensation capabilities (such as JZM and SJM series).

Core Features and Advantages

1. High performance compensation capability
   The angular displacement compensation amount is twice that of the gear coupling, and the radial displacement reaction force is small, allowing for axial deviation of ± 0.5mm and radial deviation of ± 1.5mm (taking DJM type as an example).

2. No lubrication design
   Metal film does not require lubrication, avoiding oil pollution, and is suitable for industries with high cleanliness requirements such as food and chemical.

3. Resistant to extreme environments
   The working temperature range is -80 ℃ to+300 ℃, resistant to acid and alkali corrosion (such as couplings used in chemical pumps), and resistant to impact and vibration (such as wind power equipment).

4. Efficient transmission
   The transmission efficiency is as high as 99.86%, and the torque transmission range is from 10Nm to 8.1 million Nm, suitable for high-speed and high-power scenarios (with a maximum speed of 6000r/min).

Key design parameters and selection

1. Diaphragm type
   Linkage type: commonly used in high torque scenarios, such as metallurgical machinery.
   Whole piece: suitable for precision transmission, such as aviation power systems.

2. Installation parameters
   Bolt fit clearance: 0.20-0.30mm (key section for transmitting torque).
   Gap between buffer sleeves: 0.5-0.7mm (for positioning membranes).

3. Selection steps
   Calculate peak torque (including acceleration and deceleration conditions);
   Verify the size of the shaft hole (recommended J1 standardized shaft hole);
   Choose a single/double membrane structure based on the deviation.

Application scenarios

1. Energy sector: generator sets, wind turbines (such as expansion sleeve membrane couplings).
   

2. Industrial equipment: compressors, pumps (chemical pumps require corrosion-resistant diaphragms).
   

3. Precision Machinery: CNC Machine Tool Servo System (Zero Rotary Clearance Design).
   

4. Transportation: Ship propulsion system (anti seawater corrosion characteristics).

Laminated membrane couplings with their unique performance advantages, are gradually replacing traditional gear couplings and becoming the preferred solution for modern industrial transmission. The correct selection and standardized installation are the key to its effectiveness.