How is a pulley system composed?
The pulley is a load-bearing part of a crane's metallurgical engineering. Due to different usage conditions, the working tension in the flexible part can be changed, or its movement speed and movement direction can be changed. It can be used as a guide pulley, and is more used to form a pulley set.
There are two types of pulleys for cranes: fixed pulleys and moving pulleys, which are combined to form a pulley group.
(1) Fixed pulley
The fixed pulley is essentially a right arm lever, which does not save effort or effort, but can change the direction of the force.
The characteristics of fixed pulleys: It is not easy to pull the hook and code through fixed pulleys. The reading of the spring scale is the same through or without the fixed pulley. It can be seen that using a fixed pulley does not save effort but can change the direction of force. In many cases, changing the direction of force will bring convenience to work.
The principle of fixed pulley: The fixed pulley is essentially an equal arm lever, and the power L1 and resistance L2 arms are equal to the pulley radius. According to the lever balance conditions, the conclusion that the fixed pulley is unsustainable.
(2) Moving pulley
The moving pulley is essentially a lever with the power arm twice as much as the resistance arm, saving 1/2 of the force and 1 times more distance.
Features of moving pulleys: Using moving pulleys can save half of the effort and take distance. This is because when using a moving pulley, the hook code is hung by two sections of rope, each section of rope only bears half of the weight of the hook code. Although using a moving pulley saves effort, the distance of the power moving is greater than the distance of the hook code to increase, which means it takes a distance.
Principle of moving pulley: The moving pulley is essentially a lever with the power arm (L1) twice that of the resistance arm (L2).
(3) Pullwheel set
Pulley set: A pulley set consisting of a fixed pulley and a moving pulley, which saves effort and changes the direction of force.
The pulley set uses several pieces of rope to hang the object, and the force used to lift the object is one-some of the total weight. The free end of the rope is calculated by circumciding a section of the moving pulley, while the fixed pulley is not counted.
Although using pulley sets saves effort, it takes distance, and the distance that the power moves is greater than the distance that the heavy object moves.
Purpose of pulley set: In order to save and change the direction of power, fixed pulleys and moving pulleys can be combined into pulley sets.
The size of labor saving: When using a pulley set, the pulley set uses several ropes to hang the object, and the force used to lift the object is one-something of the weight.
Features of pulley sets: Using pulley sets for experiments, it is easy to see that although using pulley sets saves effort, it takes a distance - the distance of power moving is greater than the distance of the cargo rising.
The pulley is a load-bearing part of a crane's metallurgical engineering. Due to different usage conditions, the working tension in the flexible part can be changed, or its movement speed and movement direction can be changed. It can be used as a guide pulley, and is more used to form a pulley set.
There are two types of pulleys for cranes: fixed pulleys and moving pulleys, which are combined to form a pulley group.
(1) Fixed pulley
The fixed pulley is essentially a right arm lever, which does not save effort or effort, but can change the direction of the force.
The characteristics of fixed pulleys: It is not easy to pull the hook and code through fixed pulleys. The reading of the spring scale is the same through or without the fixed pulley. It can be seen that using a fixed pulley does not save effort but can change the direction of force. In many cases, changing the direction of force will bring convenience to work.
The principle of fixed pulley: The fixed pulley is essentially an equal arm lever, and the power L1 and resistance L2 arms are equal to the pulley radius. According to the lever balance conditions, the conclusion that the fixed pulley is unsustainable.
(2) Moving pulley
The moving pulley is essentially a lever with the power arm twice as much as the resistance arm, saving 1/2 of the force and 1 times more distance.
Features of moving pulleys: Using moving pulleys can save half of the effort and take distance. This is because when using a moving pulley, the hook code is hung by two sections of rope, each section of rope only bears half of the weight of the hook code. Although using a moving pulley saves effort, the distance of the power moving is greater than the distance of the hook code to increase, which means it takes a distance.
Principle of moving pulley: The moving pulley is essentially a lever with the power arm (L1) twice that of the resistance arm (L2).
(3) Pullwheel set
Pulley set: A pulley set consisting of a fixed pulley and a moving pulley, which saves effort and changes the direction of force.
The pulley set uses several pieces of rope to hang the object, and the force used to lift the object is one-some of the total weight. The free end of the rope is calculated by circumciding a section of the moving pulley, while the fixed pulley is not counted.
Although using pulley sets saves effort, it takes distance, and the distance that the power moves is greater than the distance that the heavy object moves.
Purpose of pulley set: In order to save and change the direction of power, fixed pulleys and moving pulleys can be combined into pulley sets.
The size of labor saving: When using a pulley set, the pulley set uses several ropes to hang the object, and the force used to lift the object is one-something of the weight.
Features of pulley sets: Using pulley sets for experiments, it is easy to see that although using pulley sets saves effort, it takes a distance - the distance of power moving is greater than the distance of the cargo rising.
The pulley is a load-bearing part of a crane's metallurgical engineering. Due to different usage conditions, the working tension in the flexible part can be changed, or its movement speed and movement direction can be changed. It can be used as a guide pulley, and is more used to form a pulley set.
There are two types of pulleys for cranes: fixed pulleys and moving pulleys, which are combined to form a pulley group.
(1) Fixed pulley
The fixed pulley is essentially a right arm lever, which does not save effort or effort, but can change the direction of the force.
The characteristics of fixed pulleys: It is not easy to pull the hook and code through fixed pulleys. The reading of the spring scale is the same through or without the fixed pulley. It can be seen that using a fixed pulley does not save effort but can change the direction of force. In many cases, changing the direction of force will bring convenience to work.
The principle of fixed pulley: The fixed pulley is essentially an equal arm lever, and the power L1 and resistance L2 arms are equal to the pulley radius. According to the lever balance conditions, the conclusion that the fixed pulley is unsustainable.
(2) Moving pulley
The moving pulley is essentially a lever with the power arm twice as much as the resistance arm, saving 1/2 of the force and 1 times more distance.
Features of moving pulleys: Using moving pulleys can save half of the effort and take distance. This is because when using a moving pulley, the hook code is hung by two sections of rope, each section of rope only bears half of the weight of the hook code. Although using a moving pulley saves effort, the distance of the power moving is greater than the distance of the hook code to increase, which means it takes a distance.
Principle of moving pulley: The moving pulley is essentially a lever with the power arm (L1) twice that of the resistance arm (L2).
(3) Pullwheel set
Pulley set: A pulley set consisting of a fixed pulley and a moving pulley, which saves effort and changes the direction of force.
The pulley set uses several pieces of rope to hang the object, and the force used to lift the object is one-some of the total weight. The free end of the rope is calculated by circumciding a section of the moving pulley, while the fixed pulley is not counted.
Although using pulley sets saves effort, it takes distance, and the distance that the power moves is greater than the distance that the heavy object moves.
Purpose of pulley set: In order to save and change the direction of power, fixed pulleys and moving pulleys can be combined into pulley sets.
The size of labor saving: When using a pulley set, the pulley set uses several ropes to hang the object, and the force used to lift the object is one-something of the weight.
Features of pulley sets: Using pulley sets for experiments, it is easy to see that although using pulley sets saves effort, it takes a distance - the distance of power moving is greater than the distance of the cargo rising.
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