The hydraulic cylinder in the axial flow fan PAF18-13.3-2 is usually used to control the angle of the fan blades to adjust the air volume or realize the variable pitch function. The hydraulic cylinder consists of a cylinder body, a piston, a piston rod, an end cover and a seal. When the hydraulic oil enters from one side, the piston is pressed to push the piston rod to extend or retract, thereby driving the blades connected to it to rotate and change the blade angle.

In this process, the hydraulic cylinder needs to be connected to the blade drive mechanism of the fan. There are various ways to connect its input shaft and output shaft, and the common ones are direct connection, coupling connection and spring connection. Each connection method has its own characteristics and applicable occasions.

The input and output shafts here actually refer to the connection between the piston rod and the blade drive mechanism. The input shaft usually refers to the piston rod of the hydraulic cylinder, and the output shaft refers to the component connected to the blade drive mechanism. The two are connected through a specific mechanical structure to ensure that the blades can be adjusted according to the predetermined angle.

The spring PAF18-13.3-2 is an elastic element used in hydraulic cylinder connectors, which can absorb vibration and impact during the operation of the shaft, and reduce the adverse effects on the entire system. Protect the precision components in the system from damage. At the same time, it can be used to provide axial preload to ensure stable contact between the connected components.

The structure of the spring connection is generally designed as follows: one end of the piston rod may have a special boss or thread for fixing the spring element. Select the appropriate spring type and specification as needed to meet specific application requirements. Use fixing devices such as nuts, snap rings, etc. to fix the position of the spring element to ensure the firmness of the connection.

The input and output shafts of the hydraulic cylinder of the axial flow fan are key components for achieving precise control of the blade angle. Through reasonable structural design and appropriate connection methods, the working efficiency and service life of the fan can be effectively improved. Whether it is a direct connection, a coupling connection or a spring connection, it is designed to ensure that the blades can be adjusted in the expected manner while minimizing the impact of vibration and impact.

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