Diaphram Couplings

Diaphram Coupling is a high-performance flexible coupling that connects shafts through one or more specially designed metal diaphragms. Widely used in the industrial field, it gradually replaces traditional gear couplings and elastic couplings due to its excellent performance.

Core working principle: The Diaphram Coupling utilizes the elastic deformation of the metal diaphragm to compensate for radial, axial, and angular deviations between two connecting shafts. When the transmission system is running, the diaphragm absorbs vibration and impact through its own deformation, while maintaining extremely high torque transmission efficiency.

Modern Diaphram Couplings typically consist of the following key components:

Metal membrane group: usually made of stainless steel or high-strength alloy steel, with a thickness between 0.2-1.5mm, arranged in a star or bundle shape
Shaft sleeve: a high-precision component that connects the drive shaft and the driven shaft
Middle section (some models): used to increase the length of the coupling or provide additional compensation capability
Fasteners: high-strength bolts and nuts to ensure connection reliability

Structural advantages:

No backlash design ensures high-precision transmission
No lubrication required, low maintenance cost
Compact structure saves installation space
The number and arrangement of membranes can be customized according to the working conditions

Application Fields of Diaphram Couplings

High end manufacturing field:
CNC machine tool spindle transmission
Precision measuring equipment
Semiconductor manufacturing equipment

Energy industry:
Gas turbine generator set
Wind turbine
Pump set transmission system

Transportation:
Ship propulsion system
High speed train transmission
Aerospace auxiliary power unit

Special environmental applications:
Key equipment of nuclear power plant
Deep sea operation machinery
High cleanliness environment

Key factors for selection:

Torque demand: Calculate peak torque and sustained operating torque
Speed range: Consider critical speed and dynamic balance requirements
Deviation compensation: Evaluating the alignment error of the system
Environmental conditions: special requirements such as temperature, corrosiveness, explosion-proof, etc
Space limitations: Installation size and weight constraints

Selection steps:

Determine basic transmission parameters
Calculate equivalent torque (considering operating condition factors)
Select coupling series and size
Verify whether the compensation capability meets the requirements
Check the adaptability to special environments

Professional installation process:

Clean the contact surface between the shaft end and the coupling
Using specialized tools to ensure precise alignment (recommended laser alignment instrument)
Step by step uniform tightening of bolts (usually using a cross sequence)
Perform initial operation check (low-speed no-load operation)

Maintenance suggestion:

Regularly check the tightening status of bolts (recommended torque value recheck)
Monitor vibration and noise changes
Check for cracks or plastic deformation on the surface of the membrane
Record the trend of temperature changes during operation

As a key component of modern mechanical transmission systems, the technological evolution of Diaphram Couplings will continue to drive industrial equipment towards higher precision, efficiency, and intelligence. Correctly selecting and using Diaphram Couplings can significantly improve equipment performance and service life, and reduce overall operating costs.