Ring forged welded pulley is a common mechanical product widely used in the production of modern society. In lifting and transportation, shipbuilding, mining machinery and other industries, hot rolled pulleys need to play an important role. But the production of this pulley still has certain technical requirements and standards.

　　Ring forged welded pulley is one of the important load bearing parts of crane. According to different application conditions, it can change the working tension of the flexible parts, or change its moving speed and stretching direction. It can be used as a guide pulley and is more commonly used to form a ring-forged welded pulley.

　　Crane pulley has two kinds of pulley and movable pulley, which are combined to form ring forged welded pulley.

　　1.Crane pulley

　　Ring forging welded pulley

　　Ring forged welded pulley is essentially an equal arm lever, does not save force, but can change the direction of force.

　　Characteristics of pulleys: Pulling the hook yard through the pulley does not save force. The spring scale reads the same with or without a pulley. As you can see, using a pulley can change the direction of the force without saving effort. In many cases, changing the direction of the force will facilitate the work.

　　Principle of ring-forged welded pulley: the pulley is essentially an equal-armed lever, with the power arm and resistance arm equal to the radius of the pulley. According to the lever balance condition, it can also be concluded that the pulley does not save force.

　　2. Crane moving pulley

　　Ring forging welding pulley is essentially a force arm is twice the resistance arm of the lever, save 1/2 of the force, spend 1 times more distance.

　　Characteristics of the moving pulley: the use of a moving pulley can save half the force and cost distance. This is because when using a moving pulley, the hook code is hung by two ropes, each of which bears only half the weight of the hook code. Although the use of dynamic pulley saves force, but the distance of power movement is greater than the hook yards rise, that is, the cost distance.

　　Ring forging welding pulley principle: dynamic pulley is essentially a force arm is twice the resistance arm of the lever.

　　3. Crane ring forging welding pulley

　　Ring forging welding pulley: a follow ring forging welding pulley made of pulley ring forging welding pulley, can save labor, change the direction of force.

　　Ring forged welded pulley uses several sections of rope to lift an object, the force used to lift the object is only a small part of the total weight. If the free end of the rope goes around a moving pulley, it counts as one section, but if it goes around a pulley, it does not. The use of ring forged welded pulleys saves power but costs distance, with the power moving a greater distance than the weight.

　　Application of ring forged welded pulley: In order to save energy and change the direction of power, you can combine the pulley and dynamic ring forged welded pulley to form a ring forged welded pulley.

　　Saving energy size: When using ring forged welded pulley, ring forged welded pulley uses several ropes to lift the object, the force used to lift the object is a fraction of the weight of the object.

　　Characteristics of ring forged welded pulley: It is easy to see from the experiment of ring forged welded pulley that although ring forged welded pulley saves force, it needs distance and the distance of power movement is greater than the distance of goods lifting.