NGCL type drum gear coupling with brake wheel

NGCL型带制动轮鼓形齿式联轴器在工作时，两轴产生相对角位移，内外齿的齿面周期性作轴向相对滑动，必然形成齿面磨损和功率消耗，因此，齿式联轴器需在有良好和密封的状态下工作。齿式联轴器径向尺寸小，承载能力大，常用于低速重载工况条件的轴系传动，并经动平衡的齿式联轴器可用于高速传动，如燃汽轮机的轴系传动。由于鼓形齿式联轴器角向补偿大于直齿式联轴器，均广泛采用鼓形齿式联轴器，直齿式联轴器属于被淘汰的产品，选用者应尽量不选用。

鼓形齿是将外齿制成球面，球面中心在齿轮轴线上，齿侧间隙较一般齿轮大，Drum gear coupling相对于直齿联轴器可允许较大的角位移，可改进齿的接触条件，提高传递转矩的能力，延长使用寿命，具有径向、轴向和角向等轴线偏差补偿能力，具有结构紧凑、回转半径小、承载能力大、传动效果好、噪声低及维修周期长等优点。

NGCL型带制动轮鼓形齿式联轴器的特点(与直齿式联轴器相比有以下特点)：

1、承载力强。在相同的内齿套外径和联轴器大外径下，NGCL型带制动轮鼓形齿式联轴器的承载能力平均比直齿式联轴器提高15～20％。

2. Large angular displacement compensation.When the radial displacement is equal to zero, the allowable angular displacement of the spur gear coupling is 1°, and the allowable angular displacement of the drum gear coupling is 1°30', an increase of 50%.Under the same modulus, number of teeth, and tooth width, the allowable angular displacement of the drum tooth 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 squeezing the edge of the straight tooth 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 gears convenient.

5、为增强润滑密封效果、减少零件数量，特别建议选用密封端盖与内齿圈作成一体的整体结构型式。

6. The tooth spacing is small, the allowable relative radial displacement is small, the structure is compact, and the moment of inertia is small. It is suitable for the occasions matching with brake shoe

7. It is allowed to rotate in the forward and reverse directions, and the external gear sleeve on either side can be used as the active input end, and the nominal torque can be transmitted from 400 to 100000 N·m.

The basic parameters and main dimensions of NGCL type drum gear coupling with brake wheel (JB/ZQ4644-1997) (unit: mm)