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| | | ENGINEERING | | |
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| | | k DETERMINATION OF APPLIED LOADS AND BEARING REACTIONS - continued Tangential Force: F = (1.91 x 107) H ,np,^nns) = _(1.26 x 105) H_(pnunds-fnrcp) mP P Thrust Force: Fcdp = Ftp tan op sinYP Separating Force: Fsp = Ftp tancDpcosYP | | |
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| | | Gear: Tangential Force: | | |
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| | | (1.91 x 107) H D „ nn mG G | | |
| | | (newtons) (pnunds-fnrcp) | | |
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| | | = (1.26 x 105) H | | |
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| | | D n mG G | | |
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| | | Thrust Force: FaG = FtG tan (DG sinYG Separating Force: FsG = FtG tan OG COSYG | | |
| | | Fig. 8. Spiral bevel and hypoid gears - the direction of thrust and separating forces depends upon spiral angle, hand of spiral, direction of rotation, and whether the gear is driving or driven. | | |
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| | | Spiral Bevel and Hypoid Gearing In spiral bevel and hypoid gearing, the direction of the thrust and separating forces depends upon spiral angle, hand of spiral, direction of rotation, and whether the gear is driving or driven (see Table 3). The hand of the spiral is determined by noting whether the tooth curvature on the near face of the gear (Fig. 8) inclines to the left or right from the shaft axis. Direction of rotation is determined by viewing toward the gear or pinion apex. In spiral bevel gearing: FtP ~ FtG In hypoid gearing: FtP = FtG COS qjp | | |
| | | Fig. 9. Spiral bevel and hypoid gearing. | | |
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| | | COS IPG Hypoid pinion effective working diameter:
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| | | DmP = DmG | | / Np \ / COSUJG \ ( N G )( C OS p p ) | | |
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