Category: Actuators

Telescopic Cylinder

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Telescopic Cylinder

A telescopic cylinder (shown in Fig. 1.6) is used when a long stroke length and a short retracted length are required. The telescopic cylinder extends in stages, each stage consisting of a sleeve that fits inside the previous stage. One application for this type of cylinder is raising a dump truck bed. Telescopic cylinders are […]

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Tandem Cylinder

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Tandem Cylinder

A tandem cylinder, shown in Fig. 1.7, is used in applications where a large amount of force is required from a small-diameter cylinder. Pressure is applied to both pistons, resulting in increased force because of the larger area. The drawback is that these cylinders must be longer than a standard cylinder to achieve an equal […]

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Double-Acting Cylinder with a Piston Rod on Both Sides

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Double-Acting Cylinder with a Piston Rod on Both Sides

A double-acting cylinder with a piston rod on both sides (Fig.1.5)is a cylinder with a rod extending from both ends. This cylinder can be used in an application where work can be done by both ends of the cylinder, thereby making the cylinder more productive. Double-rod cylinders can withstand higher side loads because they have […]

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Spring-Return Single-Acting Cylinder

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Spring-Return Single-Acting Cylinder

A spring-return single-acting cylinder is shown in Fig.1.3.In push type [Fig. 1.3(a)], the pressure is sent through the pressure port situated at the blank end of the cylinder. When the pressure is released, the spring automatically returns the cylinder to the fully retracted position. The vent port is open to atmosphere so that air can […]

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Gravity-Return Single-Acting Cylinder

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Gravity-Return Single-Acting Cylinder

Figure1.2 shows gravity-return-type single-acting cylinders. In the push type [Fig. 1.2(a)], the cylinder extends to lift a weight against the force of gravity by applying oil pressure at the blank end. The oil is passed through the blank-end port or pressure port. The rod-end port or vent port is open to atmosphere so that air […]

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Single-Acting Cylinders

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Single-Acting Cylinders

A single-acting cylinder is simplest in design and is shown schematically in Fig.1.1. It consists of a piston inside a cylindrical housing called barrel. On one end of the piston there is a rod, which can reciprocate. At the opposite end, there is a port for the entrance and exit of oil. Single-acting cylinders produce […]

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Oscillating Motors

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Oscillating Motors

Oscillating motors are actuators that generate rotation at a certain angle with a hydraulic pressure. They include the vane and piston types. They can be easily mounted because they do not require a link mechanism. Also, these motors are compact and provide a high torque. (1) Vane type oscillating motor: single vane and double vane […]

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Piston Motors

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Piston Motors

Piston motors are available in axial and radial types. Also available are fixed and variable displacement axial piston motors that operate at a high, medium, or low speed with a bent axis or swash plate. The axial piston motor has a higher volumetric efficiency than other types of motors. Radial piston motors generally operate with […]

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Vane Motors

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Vane Motors

(1) Low-speed high-torque vane motor: This motor has a relatively large capacity and operates with a high torque at a low speed. The motor shown in Fig. 10.6 has four motor chambers and can change the torque control mode to 1/3 and 2/3. (2) Medium-speed vane motor: This motor has a structure similar to that […]

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