Magnetic coupling, also called permanent magnetic coupling, is a kind of transmission method which connects motor and another device by permanent magnetic force. It works mostly in the magnetic driven pumps, which transporting corrosive, volatile, flammable, explosive and toxic solutions without leakage. Permanent magnetic coupling consists of external coupling, internal coupling and containment shroud(spacer sleeve). The appearance of permanent magnetic coupling thoroughly tackled the leakage problems existed in dynamic sealing of certain mechanical devices.

 

 

Item	Description
1	External Coupling
2	Magnet
3	Internal Coupling
4	Containment Shroud

 

 

Permanent magnetic coupling works by using the power generated by permanent magnets. No external power supply is needed. These are permanent magnets not electromagnets. The magnets are installed alternating between poles in a side by side and opposing position

 

Material Selection:

Magnet: it’s based on working temperature and corrosion-resistance requirements.

NdFeB – Temperatures up to 150°C. Corrosion protection required.

Ceramic – Temperatures up to 250°C. Corrosion protection not required.

SmCo – Temperatures up to 350°C. Corrosion protection optional.

 

Housing: normal carbon steel, stainless steel(304, 316, 416 etc.), nickel super alloys (Inconel, Hastelloy, Monel, etc.)

 

Spacer sleeve: stainless steel, nickel super alloys (Inconel, Hastelloy, Monel, etc.), plastics (Nylon, Teflon, etc.), Ceramics.

 

 

 

1. Achieve zero leakage transfer of power by transforming traditional dynamic seal into static sealing.
2. Realize stable running of the device without contact as transmission of vibration can be avoided.
3. Can be applied in many harsh working environments: flammable, explosive, corrosive, damp, high-dust content, high temperature, low temperature etc.
4. Energy saving: the efficiency is improved while the load speed adjusts.
5. The torque requirement is flexible: it ranges from 100mNm. to 1000N.m, which can be customized.

 

 

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

 

http://www.gmagnets.com/