The part of the wheel in contact with the rail, that is, the outer ring of the wheel, is called the rim on the overall wheel and the rim on the wheel. The surface of the wheel rim or wheel hoop contacting with the rail is called the tread, and the convex part on one side of the tread is called the rim. The flange is located on the inner side of the rail, which can prevent the wheel set from rolling off the rail and play a guiding role. The part of the wheel that combines with the axle is called the hub. The hub and rim are connected by spokes. The spokes can be continuous disks, called spokes, or columns arranged along the radius direction, called spokes.
According to the structure, Chinese Supplier Hot-Selling Steel Forged Railway Train Wheel can be divided into two categories: hoop wheel and integral wheel. The hoop wheel is made by installing the hoop on the wheel center with the hot suit method and inserting the retaining ring. The retaining ring can prevent the wheel hoop from coming out when the wheel hoop and the wheel center are loose, and play the role of safety stop. The integral wheel is a combination of the wheel hoop and the rim on the wheel center. In addition, some countries also use wheels with elastic elements between the rim and the spoke. This kind of wheel is called elastic wheel, which is usually only used on metro vehicles.
The contact part of the Chinese Supplier Hot-Selling Steel Forged Railway Train Wheel bears a lot of pressure and the contact surface produces elastic deformation and great contact stress; in operation, the left and right wheels inevitably roll on the rail with different diameters, resulting in sliding and wheel wear; in braking, the wheel tread is also severely worn by the brake shoe, resulting in high temperature. All of these require that the wheel tread material must have high strength, hardness, impact toughness and good wear resistance. The hub pressed on the axle mainly bears the elastic force, while the spokes or spokes only bear the pressure and bending force, which requires high toughness. The hoop and wheel center of the hoop wheel can be made of different materials, so they can meet the above requirements. The overall wheel is not as good as the wheel hoop wheel in tread wear resistance, but its weight is lighter and its cost is less. More importantly, the wheel hoop will not relax and crack. China’s railways still use wheel hoops on locomotives, and the whole rolled steel wheels have been used on passenger and freight cars.
