Long-lasting bearings in solar thermal water pump for developing countries

In order to realise various swivel and linear movements in the complex gear unit of the solar water pump, the designers were looking for suitable plain bearings. They needed to be as cost-effective as possible, ideally require no maintenance and have a long service life.

The solution: dry-running iglidur® plain bearings made of durable high-performance plastic. Bearings of the X series resistant up to +250°C are used for the rod guide (1), iglidur ® G bushings for all-round use in the transverse steering (2) and in the connecting rod bearing (4) with high alternating loads. Slotted M250 double-collar bearings, which are particularly impact-resistant, vibration-damping and wear-resistant, are clipped into the O-shaped connecting rod (3), which is made of laser-cut sheet metal. Also made of M250 material are flanged bushes, which are used in the lower rod guide (5).