Miba Industrial Bearings employs a global team of highly qualified engineers in the area of research and development. They belong to six locations on three continents and deal with an extreme variety of customer problems, applications, and specifications. Incorporating and integrating this diverse wealth of experience into our R&D work is a very unique benefit that our customers value.
Our (in-house) calculation programs are able to simulate the bearing operation and visualize the flow, deformation or stress behavior. in this way we can analyze product designs and also clarify difficult customer questions in advance. Finite Element Method (FEM) and Computational Fluid Dynamics (CFD) tools are an indispensable addition to our test benches in order to guarantee you the best technical solution.
A bearing pad design feature for higher performance that disturbs the laminar lubricant flow and creates a cooling effect by mixing cooler oil near the shaft with warmer oil near the bearing surface.
Since 2013, two bearing test benches for radial bearings have been in heavy use at the Göttingen site for conducting experiments and trial series aimed at improving performance, efficiency and operational safety. The focus is currently on improving the performance of bearings.The test bench configuration makes it possible to examine bearings in a wide range of 0–140 m/s circumferential speed (<25,000 rpm) at specific static loads of up to 10 MPa (max. static load: 63 kN) and dynamic loads of up to 5 kN.
The increase of heat dissipation from the loaded pads/areas of the bearing is key to improve the bearing performance. Miba achieves this by disturbing the laminar flow regime in the oil film with Eddy Groves. The surface temperature reduction is significant. Consequently, we can push performance limits upwards without changing the bearing design.
The efficiency/performance ratio can be optimized by a correct positioning of the lifting pockets and following the whole design of the hydraulic system is improved. Consequently, the acquisition and operating costs are reduced, and the start-up and run-out behavior are optimized. Click on send to get the whole paper.
At Miba, we routinely repair and manufacture sleeve and tilting pad journal bearings for gearboxes. The two questions often asked are; "What is the load on these journal bearings?" and "Where should temperature sensors be located in these bearings?" This paper tries to give a brief overview and answer the questions above. Click on send to get the whole paper.
To overcome conservative operation limits of tilting pad journal bearings in high-speed running turbo application it is helpful to reduce the oil film temperatures by certain design modifications. Especially the hot oil carry-over is reduced when design measures are taken to prevent the majority of the hot oil coming out of one pad and reaching the next pad. Click on send to get the whole paper.