Lubricant used in the ball groove rolling sliding contact pair of a heavy load tracked vehicle is a lithium base grease which is waterproof and heat-resistant.

Study on acoustic detection of stator slot wedges in large generators;

After a long term running of large generator,the stator slot wedges would become loose under electromagnetism force as a result of the compositive effect of stator winding current and the magnetic field across through stator slot.

The overhaul procedure of the stator wedge in pumped storage power station is introduced in this paper.

An on\|site test was performed through the acoustic detection system to detect stator wedge looseness in a generator.

In this paper,a physical model,thin plate resonator model,is proposed and analyzed based on the thin plate theory to investigate the acoustic signal response of the loose stator wedge to an impact.

The authors analyse at first the skin effect coefficient on rotor slot of different shapes by adopting finite element method; and then predict the skin effect coefficient of motor rotor by a new method which combines nonlinear mapping ability of artificial neural netwo.

Optimization of numerical simulation for rotor wedge of 600MW turbogenerator with gap-pickup ventilation system was investigated with CFD software.