Category: Hydraulic Actuators

Rack and Pinion Rotary Actuator

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Rack and Pinion Rotary Actuator

referred to as limited rotation cylinders, of the single or multiple, bidirectional piston are used for turning, positioning, steering, opening and closing, swinging, or any other mechanical function involving restricted rotation. Figure 10-10 shows a typical rack-and-pinion double piston actuator. The actuator consists of a body and two reciprocating pistons with an integral rack for …

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Hydraulic Piston Motors

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Hydraulic Piston Motors

Piston type motors can be in-line-axis or bent-axis types. (1) In-Line-Axis, Piston-Type Motors. These motors (Figure 4-15) are almost identical to the pumps. They are built-in, fixed- and variable-displacement models in several sizes. Torque is developed by a pressure drop through a motor. Pressure exerts a force on the ends of the pistons, which is …

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Hydraulic Vane Motors

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Hydraulic Vane Motors

Figure 4-11 shows a vane-type motor. Flow from the pump enters the inlet, forces the rotor and vanes to rotate, and passes out through the outlet. Motor rotation causes the output shaft to rotate. Since no centrifugal force exists until the motor begins to rotate, something, usually springs, must be used to initially hold the …

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Hydraulic Gear Motors

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Hydraulic Gear Motors

Figure 4-10 shows a gear-type motor. Both gears are driven gears, but only one is connected to the output shaft. Operation is essentially the reverse of that of a gear pump. Flow from the pump enters chamber A and flows in either direction around the inside surface of the casing, forcing the gears to rotate …

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Hydraulic Motors

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Hydraulic Motors

Hydraulic motors convert hydraulic energy into mechanical energy. In industrial hydraulic circuits, pumps and motors are normally combined with a proper valving and piping to form a hydraulic-powered transmission. A pump, which is mechanically linked to a prime mover, draws fluid from a reservoir and forces it to a motor. A motor, which is mechanically …

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