With the progress of society, the development of crane is also faster and faster, more and more applications in engineering construction, work intensity is also increasing, will cause certain damage to the детали крана, so in order to continuously improve the performance of the crane, reduce the probability of damage, there is the use of excellent design to reduce the intensity of work, and the pulley of the crane is this role. Why can a small crane lift heavy objects easily?
The main purpose of the pulley used in the crane is to wind the wire rope, change the movement direction of the wire rope and achieve the purpose of labor saving. According to its different functions, it can be divided into fixed pulley, movable pulley, pulley block, guide pulley, etc. In the hoisting operation, if only the fixed pulley is used, the direction of force can only be changed, but it can't play the role of labor saving; although only the movable pulley can play the role of labor saving, it can't change the direction of force. In this way, the fixed pulley and movable pulley must be connected together to form a pulley block to meet the requirements of crane operation.
There are many materials for pulleys, such as hot-rolled pulleys, cast iron pulleys, cast steel pulleys, nylon pulleys, aluminum alloy pulleys, etc. according to the workload of the crane and the actual situation of the working environment, choose the suitable materials for pulleys. The pulley should be checked regularly, because the pulley will also be worn. The wear of the pulley is caused by the wire rope cutting into the pulley. When the groove of the pulley is too narrow, the pulley will reduce the service life of the wire rope and the service performance of the newly installed wire rope. Therefore, the pulley should be checked regularly, and it should be tested before installing the new wire rope, and it can be installed only when it meets the use standard, otherwise it will cause the safety accident of the crane.
Группа кранов Дунци Wheels are:
Our forging press provides the power necessary to achieve the dramatic reduction ratios and material flow which are essential in high quality forgings. This closed-die design provides excellent strength-toweight ratios necessary for your most critical forging needs. We stock a wide variety of carbon and alloy steels to meet your needs.
Wheel blanks that we manufacture are used in a wide range of heavy duty applications including locomotive traction drives, wind turbines, speed reducers, and mining machinery.
Once the die cavity is filled, the pressure is intensified to ensure the elimination of any microscopic porosity that may have existed as a result of the casting process. This provides an extremely uniform and homogeneous grain structure in the forging. This contrasts with cast wheels which will always have some porosity caused by shrinkage of the steel during solidification. The grain structure and directional orientation of flow lines produces greater yield and tensile strength and other physical properties than can be achieved in a cast wheel.
Heat treating can significantly enhance the mechanical properties of a forging by imparting specific hardness, strength, and wear characteristics to meet the requirements of the application. A wide variety of heat treating capabilities are at our disposal to meet virtually any application.
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