Research on Durable Strength of Qingdao Pulley Car
The pulley is a small wheel with a groove around it that can rotate around the axis. A simple machine consisting of a disk that can be rotated around a central axis and a flexible cable (rope, tape, cable, chain, etc.) that spans the disk can be called a pulley.
Fluorescent Dyes have long been used mainly for the dyeing of flat materials, especially textiles. The use of fluorescent dyes causes a significant increase in color brightness, which makes the dyed materials more easily perceptible, or more accurately visible. Indeed, fluorescent dyes are considered to be those dyes which absorb and emit radiation in the visible spectral range light and causes fluorescence. These dyes are defined as a group of organic dyestuffs which, when applied to a textile material, give rise to fluorescence under UV radiation and in daylight. In the textile field, the main use of fluorescent dyes is in the coloration of synthetic fibers, especially polyester, polyamide and acrylics in conjunction with elastane fibers, for fashion, leisure, sportswear uses and especially for safety. In industry, many textile materials are dyed with mixtures of dyes to achieve the exact reproducibility of the required color. The use of two or three fluorescent dyes with non-identical properties can affect the sorption of the dye and the high visibility.
The pulley is a small wheel with a groove around it that can rotate around the axis.
A simple machine consisting of a disk that can be rotated around a central axis and a flexible cable (rope, tape, cable, chain, etc.) that spans the disk can be called a pulley.
The pulley is a deformation lever, which is a simple type of lever type machine and has a wide range of uses. In the book "Mojing" in China as early as the Warring States period, there are records about pulleys. The fixed pulley of the central shaft is called a fixed pulley, which is a deformed equal-arm lever. It is effortless and effortless but can change the direction of the force. The pulley that moves the center shaft with the heavy object is called the moving pulley, which is a deformed unequal arm lever (saving lever), which can save half of the force, but doubles the distance (the moving pulley rises n meters, the free end of the string rises 2n meters, n ≥ 0), and the direction of the force cannot be changed. The direction of the force of the fixed pulley is equal, no matter where it is, the force used to lift the weight is equal (the rope weight and the friction between the rope and the wheel are not counted) (the power arm and the resistance arm are equal and equal to the radius of the pulley); The moving pulley string is the most labor-saving when the force direction is vertical.
The pulley block is made up of several fixed pulleys and movable pulleys, which can achieve the purpose of saving labor and changing the direction of force action. In use, the labor saving and the winding method of the rope are determined by the use effect of the pulley block. The pulley is carried by two ropes, that is, each rope bearing object and moving pulley are composed of a disc that can rotate around the central axis and a flexible cable (rope, tape, steel cable, chain, etc.) that spans the disc. A simple machine that rotates around a central axis. The pulley is a deformation of the lever and belongs to a simple mechanical type of lever. In the book "Mojing" in China as early as the Warring States period, there are records about pulleys. The fixed pulley of the central shaft is called a fixed pulley, which is a deformed equal-arm lever, which is not labor-saving but can change the direction of the force. The pulley that moves the center shaft with the heavy object is called a moving pulley. It is a deformed unequal arm lever that can save half of the force but does not change the direction of the force. In practice, a certain number of moving pulleys and fixed pulleys are often combined into various types of pulley blocks. The pulley block saves both the force and the direction of the force. 
Disperse Fluorescent Dyes,Fluorescent Pigment Yellow,Fluorescent Dyes Disperse Orange,Fluorescent Dyes
TAIZHOU YOUSHENG CHEMICAL CO., LTD , http://www.youshengchem.com