Rokee® Customized Serpentine Steel Flex Coupling for Customers, Rokee® is a well-known high-quality supplier of couplings and technical services in China.
The snake spring coupling is a metal flexible coupling device that cleverly combines the high torque characteristics of gear couplings with the buffering performance of elastic couplings. This type of coupling achieves power transmission by embedding serpentine spring plates into the tooth slots of the two half couplings. Its core structure consists of two half couplings, two half housings, two sealing rings, and serpentine spring plates. During operation, the axial force exerted by the snake spring on the active end teeth drives the driven end, forming an efficient and reliable torque transmission path while effectively avoiding resonance phenomena.
From the perspective of structural evolution, various types of serpentine steel flex couplings have been developed to meet different application needs. According to the installation method, it can be divided into nine types: radial installation type (JS basic type), axial installation type (JSB), double flange connection type (JSS), single flange connection type (JSD), etc; According to functional characteristics, it can be divided into intermediate shaft type (SJS), high-speed type (JSG), brake wheel type (JSZ), brake disc type (JSP), and safety type (JSA). Of particular note is the quick disassembly type (T05 series), which adopts a conical surface combination and high-strength bolt design, saving more than 70% of disassembly time compared to traditional couplings and greatly improving maintenance efficiency.
The material selection of couplings is extremely meticulous, which directly affects product performance and service life. The snake shaped spring plate is made of high-quality spring steel (such as 60Si2MnA, 50CrVA) through strict heat treatment, with a thickness range of 2.5-20mm and a width of up to 30mm. The half coupling is mostly made of high-strength alloy steel, with a hardness of HRC28-32 after quenching and tempering treatment; Protective covers are usually made of aluminum alloy material, which not only reduces weight but also has good corrosion resistance. This material combination gives the coupling excellent wear resistance and fatigue resistance while maintaining high strength.
The most prominent design feature of the serpentine steel flex coupling is reflected in its "variable stiffness" transmission characteristics. Coupling teeth are divided into two types: linear and curved. Linear teeth maintain a constant stiffness under normal load and are suitable for working conditions with small torque changes; The curved tooth profile automatically increases the contact area and stiffness with the increase of load, making it particularly suitable for situations with large torque changes and frequent forward and reverse rotations. This intelligent load adaptability enables the coupling to effectively buffer impact loads and protect the transmission system from damage.
The torque transmission capacity of the snake shaped spring coupling covers a wide range, ranging from a minimum of 11.2N · m to a maximum of 800000N · m, and can meet various needs from micro devices to heavy machinery. Taking the JS series as an example, the nominal torque of JS1 type is 160N · m, while JS10 type can reach 25000N · m; Specially designed models such as the HK1100 can even achieve an astonishing torque of 1370000 N · m. The short-term overload capacity of the coupling is usually 2-3 times the rated torque, ensuring the safety of the system under sudden impact loads.
In terms of dynamic performance, the snake shaped spring coupling performs excellently. Its vibration reduction rate is over 36%, which can effectively absorb and attenuate the vibration energy in the transmission system; The transmission efficiency reaches 99.47%, with almost no power loss; The allowed speed range is also very wide, with standard models ranging from 1000-6000r/min, and high-speed dedicated models (such as JSG series) even reaching 10000r/min. The coupling can also compensate for certain shaft system deviations, including radial displacement of 0.5-3mm, axial displacement of 4-20mm, and angular deviation of 1 ° 15 ', significantly reducing the installation accuracy requirements.
Environmental adaptability is another major advantage of serpentine steel flex couplings. The working temperature range of the standard model is -30 ℃ to+150 ℃, and the specially designed high-temperature resistant model can be extended to -40 ℃~200 ℃; The protection level is usually IP54, and the sealed design model can reach IP65, which can effectively prevent dust and water; The lubrication system adopts a closed design, and the housing is filled with butter, which ensures good lubrication and reduces noise. In terms of chemical resistance, couplings have good resistance to most mineral oils and fats, but long-term exposure to strong acids, alkalis, or polar solvents is not recommended.
Compared with traditional couplings, serpentine steel flex couplings have obvious comprehensive advantages: compared with toothed couplings, they have better buffering and vibration reduction performance; Compared with the elastic sleeve pin coupling, its service life can be extended by more than 3 times; Compared to diaphragm couplings, it allows for larger installation deviations and is easier to maintain. Actual test data shows that under the same working conditions, the serpentine steel flex coupling can reduce the failure rate of the transmission system by more than 60% and the annual maintenance cost by about 40%.
Serpentine steel flex couplings have been widely used in various industrial fields due to their excellent performance. In the mining and metallurgical industry, it is used for heavy equipment such as crushers, ball mills, and steel mills, which can withstand strong impact loads.
Over the years, with excellent quality, we have been continuously providing many coupling products of various categories and uses complying with multiple standards and a full range of services, from the product selection to final installation and operation, for the industry fields of ferrous metallurgy, nuclear power, gas turbine, wind power, ropeway construction, lifting transportation, general equipment, etc. We strictly comply with quality system requirements and implement the whole process control to become a reliable and trustworthy partner of customers.
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