Diaphragm Coupling

The Main Characteristics of the Diaphragm Coupling

1. The ability to compensate for the misalignment of the two axes is good. Compared with the gear coupling, the angular displacement can be doubled. When the radial displacement is small, the reaction force is small and the flexibility is large. It is allowed to have a certain axial, radial and angular directions. displacement.

2. It has obvious shock absorption effect, no noise and no wear.

3. Adapt to high temperature (-80+300) and harsh environment, and can run safely under shock and vibration conditions.

4. The transmission efficiency is good, up to 90%. Especially suitable for medium and high-speed high-power transmission.

5. Simple structure, light weight, small size, easy assembly and disassembly. It can be assembled and disassembled without moving the machine (referring to the type with an intermediate shaft), and no lubrication is required.

6. It can accurately transmit the speed and run without slip, which can be used for the transmission of fine machinery.

The diaphragm coupling consists of at least one diaphragm and two shaft sleeves. The diaphragm is pinned to the bushing and will generally not loosen or cause backlash between the diaphragm and bushing. Some manufacturers offer two diaphragms or three diaphragms with one or two rigid elements in the middle, and the two sides are connected to the bushing. The difference between a single-diaphragm coupling and a double-diaphragm coupling is the ability to deal with various deviations. In view of the complex bending of the diaphragm, the single-diaphragm coupling is not suitable for eccentricity. The double-diaphragm coupling can be bent in different directions at the same time to compensate for eccentricity.

The Correct Choice of Diaphragm Coupling

1. The diaphragm coupling consists of at least one diaphragm and two shaft sleeves. The diaphragm is pinned to the bushing and will generally not loosen or cause backlash between the diaphragm and bushing. Some manufacturers offer two diaphragms or three diaphragms with one or two rigid elements in the middle, and the two sides are connected to the bushing.

2. The characteristic of the diaphragm coupling is a bit like a bellows coupling. In fact, the way the coupling transmits torque is similar. The diaphragm itself is thin so that it flexes easily when relative displacement loads arise, and thus can tolerate misalignments of up to 1.5 degrees, while producing low bearing loads in the servo system.

3. Diaphragm couplings are often used in servo systems. Diaphragms have good torque rigidity, but are slightly inferior to bellows couplings.

4. On the other hand, the diaphragm coupling is very delicate, if it is misused in use or not installed correctly, it will be easily damaged. Therefore, it is very necessary to protect the deviation within the acceptable range of the normal operation of the coupling.

5. Adjust the model according to the shaft diameter:

The initially selected connection size of the bearing coupling, that is, the diameter of the shaft hole d and the length L of the shaft hole, should meet the requirements of the shaft diameter of the driving and driven ends, otherwise the specification of the coupling should be adjusted according to the shaft diameter.

It is a common phenomenon that the shaft diameters of the driving and driven ends are different. When the torque and speed are the same, but the shaft diameters of the driving and driven ends are different, the coupling model should be selected according to the large shaft diameter. In the newly designed transmission system, seven types of shaft holes that meet the requirements of GBT3852 should be selected. It is recommended to use the J1 type shaft hole type to improve versatility and interchangeability. The length of the shaft hole is specified in the i-bearing coupling product standard.

The Scope of Use of Diaphragm Coupling

The company adheres to the service concept of integrity and focuses on the production of diaphragm couplings.

The allowable range of eccentricity of the diaphragm coupling is large and the disassembly is quick. No noise, wear, sliding, friction rotating parts, which can reduce energy loss; light weight, suitable for high-speed operation; shaft sleeve connection without gap connection, can be used in positioning systems. The elastic element in the middle is made of stainless steel, no lubrication, good strength, long service life, and can be used in corrosive environments. Both ends of the diaphragm coupling are made of 45 steel, and the middle membrane is made of 304 stainless steel plate. Each model has different standards, different models, different torque and speed. Diaphragm couplings are widely used in water pumps (especially high-power, chemical pumps), fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery and aircraft. Diaphragm coupling is a flexible coupling with metal elastic elements with stable performance, which compensates relative displacement through the elastic deformation of the diaphragm.

If you are interested in the scope of use of our diaphragm couplings, please feel free to contact us. We will formulate a suitable solution according to your needs for your reference and selection. We sincerely look forward to cooperating with you.