Nylon sleeve inner gear ring

　　NL inner tooth elastic coupling common nylon sleeve inner gear ring has undergone a series of improvements, using high-strength glass fiber nylon 66 injection molding, injection temperature 330C, pressure 9MPA, time 4S, heat treatment for 1 hour, 24 hours after molding The humidification treatment makes it more than 3 times stronger than ordinary nylon. NL internal tooth elastic couplings. According to the user's improvement requirements for the original equipment, our factory has launched a series of products such as spline holes, tapered holes, and inch holes, so that users will not worry about non-standard and reduce the cost of customization.As a transmission device, the drum-shaped gear coupling is evolved from the development of ordinary straight-tooth couplings. Drum-shaped gear couplings have various standards and series products in many advanced industries abroad. Shaped outer gear sleeve and a pair of straight tooth inner gear ring and other parts.The torque is transmitted by the meshing of the inner and outer teeth, and the axis of the inner ring gear of the straight teeth of the drum-shaped outer gear sleeve is oscillated (called angular displacement) to compensate for the relative deviation of the two transmission axes.The greater the bulge in the tooth length direction, the greater the angular displacement, up to 6°. Generally, 1°～1.5° is recommended, while the old gear coupling only allows 0.5°; from the point of view of bending strength and load-bearing capacity, Under the same working conditions, the transmission torque of the drum gear coupling can be increased by 15-20%.The bulge in the tooth length direction makes the tooth pair contact better. Therefore, the drum gear coupling has the advantages of large transmission capacity, large angular displacement, stable transmission, high efficiency and long life.Therefore, straight gear couplings are gradually replaced, and are widely used in metallurgical machinery, heavy-duty, mining machinery, lifting, transportation machinery and other transmissions.
   　The characteristics of drum gear couplings (compared to straight gear couplings with the following characteristics):
   　1. Strong carrying capacity.Under the same outer diameter of the inner gear sleeve and the large outer diameter of the coupling, the load-bearing capacity of the drum gear coupling is 15-20% higher than that of the straight gear coupling on average.
   　2. Large angular displacement compensation.When the radial displacement is equal to zero, the allowable angular displacement of the spur gear coupling is 1o, and the allowable angular displacement of the drum gear coupling is 1o30', an increase of 50%.Under the same modulus, number of teeth, and tooth width, the allowable angular displacement of the drum gear is larger than that of the straight tooth.
   　3. The drum-shaped tooth surface improves the contact conditions of the inner and outer teeth, avoids the disadvantages of spur tooth end edge extrusion and stress concentration under the condition of angular displacement, and at the same time improves the friction and wear of the tooth surface, and reduces Noise, long maintenance period.
   　4. The tooth end of the outer gear sleeve is in the shape of a horn, which makes the assembly and disassembly of the inner and outer teeth very convenient.
   　5. The transmission efficiency is as high as 99.7%.
   　Based on the characteristics of the warp, at present, drum-shaped teeth have generally been substituted for straight-tooth couplings at home and abroad.
    　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 consumption. Therefore, the gear coupling must have a good and Work in a sealed state.Gear couplings have small radial dimensions and large load-bearing capacity. They are often used for shafting transmissions under low-speed and heavy-duty conditions. High-precision and dynamically balanced gear couplings can be used for high-speed transmissions, such as gas turbine shafting. transmission.Since the angular compensation of drum gear couplings is greater than that of straight gear couplings, drum gear couplings are widely used at home and abroad. Straight gear couplings are obsolete products. Those who choose should try not to use them. .