Original scientific paper The slip, the resistance to rolling and pulling force are interconnected. The influence of tyre wear on the tractor pulling force and slip on three different grounds was observed. The tangential force was measured by dynamometers fixed to tractor driving half-axle. The pulling force on the pulling rods was measured by dynamometer fixed to the pulling force. The tractor...

When railway vehicles run on sharp curves, the coefficient of friction (COF) between outer rail and leading-outside wheel flange a bogie is an important value related to problems such as wheel/rail severe wear, squeak noise arising from contact, running safety against flange-climb derailment. In general, it difficult grasp actual state COF, which changes moment during commercial operations. Fro...

Composite manufacturing with multiple energy fields is an important source of processing technology innovation. In this work, comparative experiments on the conventional grinding and ultrasonic vibration–assisted (UVAG) hardened GCr15 steel were conducted white alumina (WA) wheel. The wheel wear patterns chips characterised. addition, force, force ratio ground surface quality investigated to ev...

This paper aimed to investigate the wear properties of different wheel-rail material pairs with various hardness values. Twin-disc experiments were carried out via cross-matching five types wheel (ER7, ER8, CL60, C-class and D-class) four rail (U71Mn, U75V, PG4 PG5). The effects bulk hardness, post-test hardening ratio, rail/wheel ratio (HR/HW) on rate materials analyzed. results indicated that...

Wear and fatigue of wheels have a great effect on the maintenance railway vehicles running safety. In case an urban where no rail lubrication system is installed, it reported that risk wheel damage high in curved sections. present study, we intended to method designing profile city trains can minimize wear sections, using multi-objective optimization method. optimization, explored design reduce...

Inverted magnetorheological (MR) polishing device mainly use a magnetic sealing ring to collect fluid. This collection method wears the wheel surface of wheel, affects accuracy and introduces machining error. In order reduce this wear improve recovery efficiency, new type collector using an air seal is proposed in paper. Furthermore, testing six factors three-level orthogonal test table used st...

In order to enhance the grinding performance of alumina ceramic materials, surface wheels is ablated by laser radiation before grinding, and three types leaf-vein bionic with different micro-groove pitches are formed compare experiments normal wheels. The forces roughness were gauged morphological characteristics ground workpiece surfaces studied. results showed that increase groove pitch, forc...

The longitudinal flutter of the wheelset system has caused abnormal wear wheel-rail and stripping tread surface, resulting in complex dynamic problems locomotive. And asynchronous vibration could bring about different left right wheels when was some non-ideal working conditions. model considering effect bending moment is established to obtain equivalent force, which can carry out response simul...