Material Technology

Leakage-reduced sliding bearing - Hydrostatic sliding bearing with minimal leakage

Ref.-No. 4875

Keywords: Hydrostatic, plain bearings, breakaway torque, energy efficiency, friction coefficient, heavy duty

The new, energetically optimized sliding bearing with hydrostatic support efficiently reduces the drive power of machines. The stress on the bearing is held hydrostatically by pressure generated within the bearing. This efficiently reduces release moments at the beginning of motion and avoids jerking start-up movements. During the movement process, a lubricant in interaction with the tribological contact surfaces ensures a constant low friction value of the bearing. Compared to inventive bearings, the energy consumption of the drive is more uniform and lower than for sliding bushes or sliding shoes. An extremely low friction value in the start-up phase results in an exact positioning accuracy in the final positions. Leakage in the bearing gap is minimized by a high viscosity pressure medium within the sealing gap. The sealing gap geometry is reduced by using a density element to minimize the leakage amount to the lowest level possible. The advantage of this new bearing technology has been demonstrated in extensive series of tests for linear and radial bearing designs. The energy optimization is achieved by minimizing or avoiding the leakage, by reducing the friction value, by improved lubrication and by building an internal relief force.

Competitive Advantages

  • Wear and tear free machine turn on
  • Energy efficient
  • Compensation tolerances
  • Suitable for extremely heavy machine

Commercial Opportunities

The novel sliding bearing enables cost-efficient production with significantly lower precision requirements for individual components of the bearing assembly. The design of a machine thus becomes much more economical. The use of elastic components in the form of seals compensates for greater tolerances and enabled cost-effective standard processes in production. Due to minimal leakage flows, considerable savings are made in the machine components, especially in hydraulic supply units and in the recirculation of the leakage media. The new technology has great application potential in the entire machine and plant construction, vehicle technology, moving working machines, mechanical process engineering, shipbuilding, agricultural technology, bridge construction, steel hydraulic engineering, wind power technology and the energy industry.

Current Status

A first prototype of the invention has been tested and a patent application has been filed in Germany and Europe. On behalf of Hochschule Niederrhein, PROvendis offers licenses for the invention to interested companies. Furthermore, PROvendis is looking for a partner for further development in view of licensing the technology.

An invention of Hochschule Niederrhein.

Dipl.-Ing. Oliver Werche
+49 208 9410542