Parking brake shoes. Operational tests

Abstract

The article is a continuation of previously published works on new parking shoes, developed by scientists of the JSC “VNIIZhT” jointly with specialists of the Central Directorate of Traffic Management of the JSC “Russian Railways”, now have been already passed all the necessary tests. Features and results of the controlled performance of the pilot batch of new parking shoes are analyzed in the receiving-departure yard of the Losinoostrovskaya station of the Moscow railway. The results of the tests exceeded all expectations. During the period of 3 months of controlled operation, claims were brought only to the design of the valve; the design of the valve was changed when the product was refined. After semiannual operation, excessively firm steps against the rolling down began to crack, which, however, did not affect the performance of the shoes. In the harshest conditions, no rolling of the car wheels through new shoes was recorded. Ordinary operational damages in the form of skate twists, toe buckling, deformation and separation of the sides were not observed. Damage to new shoes, taking into account the number of fastenings and the number of fixed cars during the time of controlled operation, was 45.6 times less compared to the standard shoes. It is concluded that the new shoes considerably overweigh the serial ones for all technological and operational parameters (weight, strength, reliability of fastening, ease of use, manufacturability, price/quality ratio). At present, the new shoe is fully ready for mass production.

Keywords

• parking brake shoes
• new design
• pilot batch
• operational tests