The roller chain coupling uses a common chain to mesh with two parallel sprockets with the same number of teeth at the same time. The main difference between different structure types of roller chain couplings is the use of different chains. Common ones are double-row roller chain couplings, single-row roller chain couplings, toothed chain couplings, and nylon chain couplings.
1. Definition
Features of roller chain couplings: Double-row roller chain couplings have better performance than other structural couplings, and are widely used at home and abroad. Applied disciplines: mechanical engineering (first-level discipline); mechanical parts (second-level discipline); coupling (third-level discipline)
The roller chain coupling has a simple structure (composed of four pieces), convenient assembly and disassembly, no need to move the connected two shafts during disassembly, compact size, light weight, certain compensation capability, low installation accuracy requirements, and reliable work , Long life, low cost and other advantages, the roller chain coupling should work under the conditions of good lubrication and protective cover. This type of roller chain coupling has 13 specifications. They are suitable for shaft hole diameter d=16-190mm, shaft hole length L=42-352mm, nominal torque T=40-25000m, and allowable speed without cover. It is 200-1400r/min in the case of shell, and 900-4500r/min in the case of installing the cover.
2. Environmental Performance
The GL roller chain coupling has the hardness of steel, and the roller chain coupling has excellent corrosion resistance and environmental performance. The GL type roller chain coupling ultra-precision machining machine tool can achieve the required accuracy, but due to the special structure of the roller chain coupling, guide rail, and spindle due to ultra-precision machining, this type of machine tool is not only expensive, but also has a biased stroke. The shortcomings of small size, low cutting efficiency, and long clamping time make it difficult to meet the needs of mass production of larger workpieces. The integral rolling lining has no joints (ETFE lining thickness is 2~5mm), which can withstand various concentrations of acids, alkalis, salts, strong hydrogenating agents, organic compounds and all other strong corrosive chemical media (corrosion resistance and PTFE same).
The roller chain coupling is an ideal product to solve the difficult corrosion problems of high-temperature dilute sulfuric acid, hydrofluoric acid, hydrochloric acid and various organic acids. It is resistant to positive and negative and vacuum, alternately changing between cold and heat, and the lining is not affected. It can be solved The delamination problem of PTFE-lined sheet equipment is defined as a feature of high-precision processing. In addition to the tolerance range, it also considers the size and batch size of the parts. Maintaining a tolerance of 5μm when processing large quantities of parts, maintaining a tolerance of 2μm when machining two matching parts, or processing with a small diameter end mill on a machine tool with a positioning accuracy of 0.3μm, etc., are all high-precision machining category. In other words, the size of the part and the batch size of the workpiece determine the difficulty of achieving certain specific tolerances.
3. Features And Applications
(1) Features: The chain coupling uses a common chain, which meshes with two side-by-side sprockets with the same number of teeth. Chain couplings of different structures. The main difference is the use of different chains, the common ones are double-row roller chains. Couplings, single-row roller chain couplings, toothed chain couplings, nylon chain couplings, etc. The performance of double-row roller chain couplings is better than that of other structural types of couplings. It is widely used at home and abroad, and our country has also formulated it as a national standard.
(2) Application: It can be used for shafting transmission of textile, agricultural machinery, lifting and transportation, engineering, mining, light industry, chemical industry and other machinery. It is suitable for high temperature, humidity and dusty working conditions. It is not suitable for high speed and severe impact loads. And when transmitting axial force, the chain coupling should work under the condition of good lubrication and protective cover.