Introduction to commonly used coupling types and complete list of coupling models
Introduction to the classification and performance of commonly used couplings
1. Flange coupling
Flange coupling (also known as flange coupling) uses bolts to connect two flange disc half couplings, and the two half couplings are connected to the two shafts with keys respectively to achieve The two axes are connected to transmit torque and motion. The flange coupling has a simple structure, easy manufacturing, low cost, reliable operation, convenient assembly, disassembly and maintenance, large transmission torque, and can ensure high alignment accuracy of the two axes. It is generally used for stable loads. Shaft transmission with high speed or high transmission accuracy requirements. The flange coupling does not have the performance of radial, axial and angular compensation. If the alignment accuracy of the two connected shafts cannot be guaranteed during use, the service life, transmission accuracy and transmission efficiency of the coupling will be reduced, and it will cause Vibrations and noises.
Flange couplings are divided into:
YL type—— Basic type, YLD type – center type.
2. Slide coupling
The structure of the slider coupling is similar to that of the cross slider coupling. The difference is that the middle cross slider is square, and the middle slider is used on both sides. The corresponding radial grooves on the end faces of the side half couplings slide in to realize the connection of the two half couplings. The sliding block coupling is noisy, has low efficiency, and wears quickly. It is generally not used as much as possible and is only used when the rotational speed is very low. Its model is: WH type. 3. Chain coupling
The chain coupling uses a common chain to communicate with two Parallel sprockets with the same number of teeth mesh. The main difference between chain couplings with different structural forms is the use of different chains. Common ones include double-row roller chain couplings, single-row roller chain couplings, and toothed chain couplings. Shaft, nylon chain coupling, etc. The performance of the double-row roller chain coupling is better than that of other structural couplings. It has a simple structure and is easy to assemble and disassemble. There is no need to move the two connected shafts during disassembly. It is compact in size and quality.It has the advantages of light weight, certain compensation ability, low installation accuracy requirements, reliable operation, long life and low cost. The main models are: GL type (without cover), GLF type (with cover).
4. Gear coupling
The gear coupling is composed of an inner ring gear with the same number of teeth and a flange half coupling with external teeth. External teeth are divided into two types: straight teeth and drum-shaped teeth. The so-called drum-shaped teeth are made of external teeth into a spherical surface. The center of the spherical surface is on the gear axis. The tooth side clearance is larger than that of ordinary gears. The drum-shaped tooth coupling can allow a larger Large angular displacement (relative to straight tooth coupling) can improve the contact conditions of the teeth, improve the ability to transmit torque, and extend the service life.
When the gear coupling is working, the two shafts produce relative angular displacement, and the tooth surfaces of the internal and external teeth periodically slide relative to each other in the axial direction, which will inevitably cause tooth surface wear and power loss. consumption, therefore, the gear coupling needs to be in good lubrication and sealing condition. The gear coupling has small radial size and large load-bearing capacity. It is often used for shaft system transmission under low-speed and heavy-load conditions. High-precision and dynamically balanced gear couplings can be used for high-speed transmission. Since the angular compensation of the drum gear coupling is greater than that of the spur gear coupling, it is widely used. The forms of drum gear couplings are:
GICL type – wide basic type, The internal ring gear is wider and can compensate for larger axis offsets, and is suitable for connecting two horizontal coaxial shaft system transmissions.
GIICL type – narrow basic type, with small tooth spacing, small allowable relative radial displacement, compact structure and small transmission inertia. GICLZ type – wide type connected to the intermediate shaft type.
GIICLZ type – narrow type connected to the intermediate shaft type.
GCLD type – connected to the motor shaft, suitable for use with motors. Type WGP – type with brake disc, suitable for occasions matched with disc brakes. WGC type – vertical installation type, suitable for vertical two-axis shaft system transmission.
WGZ type – braked wheel type, suitable forWhen matched with brake shoe type brake.
WGT type – intermediate sleeve type, suitable for long-distance connections.
TGL type – nylon internal ring gear type, suitable for 2500N. MThe following small and medium torque, connecting the transmission of two coaxial lines. WGJ type – connected to the intermediate shaft type, NGCL type – braked wheel type NGCLZ type – braked wheel type WG type – basic type.
5. Universal coupling
There are many types of universal couplings Common structural forms include cross-shaft universal coupling and ball cage universal coupling. The common feature of universal couplings is that the angular compensation amount is large. The angle between the two axes of universal couplings in different structural forms is different, generally between 5 to45degrees.
It is mainly divided into: SWC type universal coupling, SWP type universal coupling, SWZ type universal coupling, WSD type universal coupling, WS type universal coupling, WSH type sliding bearing universal coupling Axis. SWC type is divided into:
BH type – standard telescopic welding type Universal coupling BF type——standard telescopic flange universal coupling DH type—— Short telescopic welded universal coupling CHspan> type – long telescopic welded universal coupling WH type – no telescopic welded universal coupling WF type – non-telescopic flange universal coupling WD type – non-telescopic universal coupling SWP type is divided into:
A——with telescopic long universal coupling B——Telescopic universal coupling C——No telescopic universal coupling Coupling D——Non-telescopic long universal coupling E——Telescopic double method Blue type universal coupling.
F——Large telescopic long universal coupling G—— There is a telescopic ultra-short universal coupling.
6. Diaphragm coupling
The diaphragm coupling is composed of several groups of diaphragms (stainless steel) staggered with bolts to connect the two halves of the coupling. Each group of diaphragms is composed of several stacked pieces. The diaphragms are divided into connecting rod type and different types. One-piece shape. The diaphragm coupling relies on the elastic deformation of the diaphragm to compensate for the relative displacement of the two connected shafts. It is a high-performance metal elastic element flexible coupling that does not require lubrication, has a compact structure, high strength, and long service life. It has no rotational clearance, is not affected by temperature and oil pollution, and is acid, alkali and corrosion resistant. It is suitable for shaft system transmission in environments with high temperatures, high speeds, and corrosive media. It is widely used in shaft system transmission of various mechanical devices. Such as water pumps, fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery, aviation (helicopters), high-speed power transmission systems of ships, steam turbines, piston power mechanical transmission systems, crawler tracks Type vehicles, as well as high-speed, high-power mechanical transmission systems of generator sets, are applied to high-speed transmission shaft systems after dynamic balancing. Compared with gear couplings, diaphragm couplings have no relative sliding, do not require lubrication, sealing, are noise-free, require basically no maintenance, are more convenient to manufacture, and can partially replace gear couplings.
The main models are:
JMI type diaphragm coupling – basic diaphragm coupling with countersunk hole .
JMIJ type diaphragm coupling – connected to the intermediate shaft type diaphragm coupling .
JMII type diaphragm coupling – basic diaphragm coupling without counterbore .
JMIIJ type diaphragm coupling – connected to intermediate shaft type diaphragm coupling .
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