kääntösylinteri

Kääntösylinteri, also known as a rotary cylinder or trunnion cylinder, is a type of hydraulic or pneumatic actuator. It utilizes a rotating motion instead of a linear one. The core component is a cylinder that is mounted on trunnions, allowing it to pivot. Within the cylinder, a piston moves, and this linear motion is converted into a rotational output through a linkage mechanism, often a crank or a rack and pinion system. Alternatively, some designs directly incorporate a rotary vane or a screw mechanism within the cylinder to achieve rotational output.

Kääntösylinteri actuators are employed in various industrial applications where a controlled, limited range of rotation is required. Examples include controlling valves, manipulating robotic arms, operating material handling equipment, and positioning components in manufacturing processes. Their advantages include providing precise rotational control, high torque output, and the ability to operate in harsh environments. They are also often more compact than traditional electric motors for certain rotary applications.

The operation of a kääntösylinteri is similar to that of a standard linear cylinder. Fluid pressure is applied to one side of the piston, causing it to move. This movement is then translated into rotation. The direction and speed of rotation can be controlled by regulating the flow and pressure of the hydraulic or pneumatic fluid. The range of rotation is typically limited, often to 90, 180, or 270 degrees, depending on the specific design and application. They are a specialized form of actuator designed for specific rotational tasks.