Elastic thrust block and production method thereof

Abstract

The invention relates to an anti-thrust-used thrust pad of a water-turbine generator set. The elastic thrust pad takes a metal multiaperture elastic cushion as a substrate, the holes of which is internally filled with modified polyfluortetraethylene plastics and the surface is formed with a wearing layer. The modified polyfluortetraethylene plastics are prepared by the following raw materials according to the percentage by weight: 18-22% of copper powder, 2-3% of supramoly and 75-80% of polyfluortetraethylene. The lead powder is not added in the filling material polyfluortetraethylene of the elastic thrust pad and the added copper powder effectively increases the wearing resistance and thermal conduction of composite plastics spindle bushing. The supramoly is added for generating self-lubricating effect, thus reducing the coefficient of friction of composite plastics tiling and further increasing the wearing resistance. The elastic cushion is formed by pressing three standard copper springs, which greatly improves the uneven phenomenon of the porosity factor of the elastic cushion and causes the uniformity of the elasticity modulus of the product to be increased and the service performance to be stable.

Description

1. Technical field: [0001] The invention relates to a thrust pad applied to the thrust part of a hydroelectric generator set, and also relates to a manufacturing method thereof. 2. Background technology: [0002] At present, the thrust parts of hydro-generator sets of various capacities produced and used in my country adopt Babbitt alloy tiles, which have a low pressure ratio and a large friction coefficient (generally 0.5-0.2) to adapt to low temperatures, and have no impact on the tile surface. Mechanical deformation and thermal deformation cannot be adjusted by themselves, resulting in damage to the oil film, severe wear and ablation of the tile surface, and serious accidents such as shutdown of the hydroelectric generator set. For this reason, existing people have proposed to use polytetrafluoroethylene and lead powder as the filling material of the thrust pad to form a wear-resistant layer on its surface. The wear resistance and thermal conductivity of the lead are poor...

AI Technical Summary

Problems solved by technology

[0002] At present, the thrust parts of hydro-generator sets of various capacities produced and used in my country adopt Babbitt alloy tiles, which have a low pressure ratio and a large friction coefficient (generally 0.5-0.2). Mechanical deformation and thermal deformation cannot be adjusted by themselves, resulting in damage to the oil film, severe wear and ablation of the tile surface, resulting in serious accidents such as shutdown of the hydroelectric generator set

For this reason, existing people have proposed that the plastic prepared by polytetrafluoroethylene and lead powder be used as the filler material of the thrust pad and form a wear-resistant layer on its surface, but it is found in practical applications that the mixed wear-resistant layer of polytetrafluoroethylene and lead powder The wear resistance and thermal conductivity of the lead are poor, and lead is a heavy metal, which pollutes the environment during production and is not good for the staff. In addition, the base elastic pad is pressed by a copper spring of one specification, and the pores are uneven, so that the elastic modulus of the product is not good. Uniformity, affecting product performance

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