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This present work provides over discussion about the component and requirement of space tribology. And Pin-on-disk test is described to prove the effect on the solid lubrication under the high vacuum condition. This paper will discuss the following: space mechanism components, solid lubrication, and factors affecting wear phenomenon under the high vacuum.
The existing automatic lubrication system of the wind turbines is prone to producing the condition of less lubrication or over lubrication, which is very harmful to the bearing's work state and life period. In this thesis, a dynamic lubrication theory is brought forward. Based on practical operation condition, it can provide the necessary supply of bearing lubricating oil according to a scheme of...
When a radar system onboard a ship is struck by lightning the current has to be conducted via defined paths to prevent damage. A key element to protect is the bearing system between the rotating and stationary part. The conventional way of protecting bearing is to provide a bypass current path via additional measures such as a slip ring. The main cause of damage to the bearing system is the arcing...
A biomimetic bearing with a fail-safe braking system has been developed for installation in small, lightweight vehicles, or lifts in a production factory. The new design uses a journal bearing configuration where the rotating shaft is supported by an outer bearing lining on a soft material. The soft layer, such as is found in the articular cartilage of natural synovial joint, not only plays a role...
An environmentally friendly and low-friction bearing for applications such as tidal power generation is proposed using biomimetic technologies. A biomimetic bearing was successfully developed using a hydrated material, polyvinyl formal (PVF), which mimics articular cartilage in a natural synovial joint. A non-Newtonian fluid, polyethylene glycol (PEG) dissolved in distilled water, was used as a lubricant,...
Since the slice method have the advantage of less computation quantity and being easier to use, it is often used to solve the deformation of contact between crowned roller and race in rolling elements bearing analysis. Due to the neglecting of relationship among the roller slices, this method often had a low calculation precision in some instances. The paper presented a revised force-deformation relationship...
Bearing lubrication is very important to ensure a satisfactory and long operation of bearings. An excess of lubrication can be as damaging as a lack of lubrication. An excess of oil or grease has damaging effects in the short term such as difficult heat evacuation, sliding balls and greater current consumption. There are some procedures, such as acoustic monitoring and methods based in charts provided...
To improve the quality of the self-lubricating spherical plain bearing, a new technology of Two-way neck forming process for the manufacture of the self-lubricating spherical plain bearing was brought out. The shape of the bearing out ring blank was optimized by the parametric finite element method to minimize the necking force in the bearing neck forming process. The two-way necking die was designed...
Considered the effect of temperature on the main bearing, the temperature distributions of journal, bearing and lubricant were calculated, and the thermo hydrodynamic performances of the main bearing were analyzed by solving generalized Reynolds equation, energy equation and solid heat conduction equation, etc. The results show that the bearing has obvious effect on the temperature of lubricating...
Bearing lubrication is very important to ensure a satisfactory and long operation of bearings. An excess of lubrication can be as damaging as a lack of lubrication. An excess of oil or grease has damaging effects in the short term such as difficult heat evacuation, sliding balls and greater current consumption. As MCSA is widely recognized as a useful and reliable tool for condition monitoring of...
Solid lubrication is widely used in the space mechanical moving components, which are the important parts of spacecrafts or scanning earth sensors. In order to study the failure mode of solid lubricant and evaluate the mechanical system reliability, the Accelerated Life Test (ALT) is developed to accelerate failure by increasing the test stress. An example is given to explain how to do ALT design...
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