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Compensating capacity for relative displacement between the two shafts of a drum-type gear coupling

1) When there is no radial displacement between the two shaft axes, the permissible radial misalignment △α is as follows: For each pair of meshing internal and external teeth in a gear-type coupling with drum-shaped teeth, the permissible angular misalignment △α is 1°30'.

Detailed introduction

1) When there is no radial displacement between the two shaft axes, the permissible radial misalignment Δα is as follows: For each pair of internal and external teeth meshing in a gear-type coupling with drum-shaped teeth, the permissible angular misalignment Δα is 1°30', as shown in Figure 4.8.
The drum-type gear coupling features meshing of two pairs of internal and external gears, with an allowable angular misalignment compensation.
△αmax = 2 × 1°30′ = 3°, see Figure 4.8.

Figure 4.8: Permissible Angular Misalignment Compensation for Drum-Tooth Couplings

Figure 4.9: Permissible Radial Misalignment for Drum-Type Gear Couplings

2) When there is no angular misalignment between the two shaft axes, the permissible radial compensation amount △y is:
(a) The permissible radial misalignment △y for GIICL, GCLD, and NGCL type drum-type gear couplings is shown in Figure 4.9 and Table 4-6.

Table 4-6: Permissible Radial Compensation Amount △y (Unit: mm) for GIICL, GCLD, and NGCL Types

Model	GIICL1 GCLD1 NGCL1	GIICL2 GCLD2 NGCL2	GIICL3 GCLD3 NGCL3	GIICL4 GCLD4 NGCL4	GIICL5 GCLD5 NGCL5	GIICL6 GCLD6 NGCL6	GIICL7 GCLD7 NGCL7	GIICL8 GCLD8 NGCL8	GIICL9 GCLD9 NGCL9	GIICL10 GCLD10 NGCL10
△y	1	1	1.1	1.2	1.4	1.4	1.5	1.7	1.8	2
Model	GIICL11 NGCL11	GIICL12 NGCL12	GIICL13 NGCL13	GIICL14 NGCL14	GIICL15	GIICL16	GIICL17	GIICL18	GIICL19	GIICL20
△y	2.1	2.3	2.6	4.5	4.8	5.3	5.4	5.8	6	6.4
Model	GIICL21	GIICL22	GIICL23	GIICL24	GIICL25
△y	6.6	6.8	8	8.4	8.5

(b) The permissible radial misalignment △y for GIICLZ and WGT type drum-type gear couplings is shown in Figure 4.10 and can be calculated using the following formula: △y = A tan △α = A tan 1°30′ = 0.0262A

Figure 4.10 Allowable Radial Compensation Δy for GIICLZ and WGT Types

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NGCL Type Spherical Tooth Coupling

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