Introduction to the Y25Rs bogies
In December 1983, our country's technical staff arrived in Eastern Europe and inspected the vehicle technology in Poland, Germany, Czechoslovakia and Romania. During the inspection on the Y25 truck bogies for a comprehensive understanding, whether this bogie is suitable for China, technicians and foreign experts discussed. They think that some changes in the structure can be completely applicable to China's truck bogies.
The modified Y25 bogie is known as the "Modified Y25Rs bogie designed for China." Its structural features are also available for our country to develop new bogies for reference. Currently, the Y25 bogie has become the UIC stereotype bogie. This bogie is used in both Eastern and Western Europe. This bogie through many years of practice, the effect is very good, the use of reliable, reasonable structure, small maintenance workload, only need to add oil to the axle box in maintenance, reached the world advanced level. Therefore, these countries are now basically no longer producing cast steel three-piece bogie.
According to understand the situation, the improved Y25Rs bogie has many features, for example, the bogie is welded steel frame, in line with the requirements of UIC conditions, force components using high-performance steel, unsprung weight is relatively light, shock absorber with variable friction shock absorber to improve the serpentine movement, improve bogie speed, spring is variable stiffness, running quality is better, braking uses double-sided braking to reduce the braking force of each brake shoe.