Hydrodynamic Drives

This type of fluid coupling is occasionally used to drive pumping equipment, usually in the portable pump field (Figure 6).

Basic Principle In the most common forms of hydrodynamic drives, planetary gear trains utilize some components as oil pumps. Throttling the discharge of these pumps creates back pressure and increases drive torque.

Components The input shaft, supported by a bearing either on an independent bearing pedestal or on a packaged subbase assembly, drives the housing, endplate, manifold, and planetary gear shafts. These planet gears are partially surrounded by the manifold, which forms a pump cavity. The sun gear drives the output shaft. The control yoke moves the internal valve.

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