Abstract:

The infinite line contact geometric model of bearing with debris is set up, and the Reynolds equation with debris is deduced. The effects of debris position, debris size and surface roughness on the pressure and film thickness are discussed by the numerical simulation when considering the effect of temperature, debris and roughness, compared with the corresponding thermal EHL analysis which without debris. The results show that, there is an obvious pressure build-up over the debris. The film thickness is decreased with debris. With the debris moving toward the exit, the pressure volatility increases, the overall film thickness decreases. The large the debris size, the smaller the film thickness. The pressure throughout the contact zone after the location of the stationary debris is increased with the relative gap decreases. When taking into account the debris and surface roughness, the pressure volatility increases, the minimum film thickness decreases.

Key words: tenmat bearing, thermal EHL, water lubrication, debris