Magnetic Shaft Coupling

Magnetic shaft coupling transfers torque from one shaft to another, but using a magnetic field rather than a physical mechanical connection. It’s mostly used for liquid pumps and propeller systems, since a static, physical barrier can be placed between the two shafts to separate the fluid from the motor operating in the air. Magnetic shaft couplings preclude the use of shaft seals, which eventually wear out and fail from the sliding of two surfaces against each another. Magnetic couplings are also used for ease of maintenance on systems that typically require precision alignment, when physical shaft couplings are used, since they allow a greater off-axis error between the motor and driven shaft.

 

Magnetic shaft coupling is often synchronous (output shaft speed equals input shaft speed). It inherently results in a 1:1 relationship between the motion of the driver and follower. Synchronous coupling exploits these "attractive" and "repulsive” characteristics(magnetic poles (N-N and S-S) repel each other while opposite poles (N-S) attract) to produce motion. By placing an array of alternating pole permanent magnets (N-S, N-S) on the driver and an equivalent array of alternating pole permanent magnets on the follower, a ”coupled” magnetic circuit is produced with each North and South pole in the driver linked to each respective South and North pole of the follower.

 

 

 

1. Overload protection: It can realize overload protection during the operation. When the load of the driven part increases suddenly and the overload is too large, the two parts may slip out. The transmission of torque avoids the danger of the follower being easily damaged when it does not work normally and also protects the motor.
2. Vibration: It can avoid the transmission of vibration and realize smooth operation of the device. There is no direct contact between the active part and the driven part, and there is no rigid connection problem. One part will not be directly transmitted to another part when there is a sudden change or vibration.
3. Easy power transmission: When the magnetic coupling transmits power, it can perform linear motion, rotary motion, and helical compound motion that combines linear motion and rotary motion; the combination of magnetic coupling transmission and different mechanical structure designs can realize orderly motion in three-dimensional space, and some other differences. Movement in a certain way or displacement at a certain distance and directional movement at any angle of rotation.
4. Easy maintenance: The magnetic coupling transmission device is relatively simple in structure, and there is a gap between the driving part and the driven part, which is easy to install, disassemble and maintain.

 

 

 

 

We need your help to design the permanent magnetic coupling.

1. How much torque(force) would you like to transmit?
2. What’s the working speed?(velocity or RPM)
3. What’s the operating temperature range?
4. Is the containment shroud required? What pressure differential would you like the design to accommodate?
5. Dimensions reference

 

External Coupling

1). Shaft size

2). Mounting type

• Set screw and key
• Compression (threaded shaft end)
• Taper Lock (not available on all sizes)

3). Max. OD

4). Max. Length

 

Internal Coupling

1). Shaft size

2). Mounting Type

• Set Screw and key
• Compression (threaded shaft end)
• Taper Lock (not available on all sizes)

3). Max. Length

 

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