Jamming and sticking is the major factors cause the failure of space mechanisms. More advanced solid lubri cating technologies have to be developed to satisfy the requirements of higher reliability, longer life, higher degree of accuracy, larger torque enduring ability, smaller cubic content, and lighter weight of space mechanisms in the future. This article reviewed the peculiarity of space environment and refers to the failure case of Galileo spacecraft. Challenges the future missions facing were introduced by some missions of ESA (European Space Agency). Relating the progresses of solid lubricating technology the conclusion is get that: the Nanocomposite and nanostructured coatings of multilayer will be the first choice of solid lubricating in space mechanisms; Various processing method should be used assorted in an optimal way; the lubricating design and mechanisms design should be integrated.

The paper mainly aims at the common problems existing in driving components, especially in harmonic reducer, RV reduction gear etc., which are used in mechatronic accoutrement of engineering fields, e.g. robots, automation, advanced manufacturing at home and abroad. The paper cared about the key problems that flexspline of harmonic reducer is easy to endurance failure while continuous deflection. The paper put forward a new high performance filter transmission mechanism with high reliability, high precision, long life, large torque, lower energy consumption, small volume and lower weight, especial about the innovation design method of high performance filter transmission mechanism. The new transmission mechanism is composed of eccentric sleeve, inner meshed planet gear pair of small teeth difference, filter spline pair, three ways thrust bearing and so on. Rolling pair can filter high rotational speed of electric engine. The filter spline can filter secondary harmonics and deliver the movement to the output device smoothly. Three ways thrust bearing assure identical rotation between input interface and output interface while it limits the movement in other five way freedom. The paper has designed the eccentricity and tooth outline, made numerical simulation of the meshing process with pressure angle of 30 and 40, calculated the transmission efficiency, checken the intensity of wheels, operated comprehensive tests about transmission precision, rigidity and backlash, transmission efficiency, and so on.

This paper aims at the mechanical transmission device, especially the ship propulsion that are composed of metal pieces and lubricated by mineral oil long-time. Not only the loss of mineral oil and noble metal materials is great, but also the sealing leak of bearings lubricant inevitably pollutes the water environment seriously day by day. The paper advanced the creativity that chooses new engineering complex materials as friction pairs materials of key components to replace traditional metals, chooses natural water as lubricating mediator of transmission system to replace mineral oil, namely innovation study on efficient transmission system based on resources saving and environment amity. In the special and extreme environment, by studying water-lubricated engineering composites dynamic service behavior, by revealing key scientific problems of dynamic service behavior of driving system under the special and extreme environment, by analyzing load capacity, friction, wear and lubricating mechanism of new engineering complex materials under rotational speed, loading, temperature, runtime, clearance, sediment concentration and slenderness ratio 2<L/d<4, by studying the influence of new engineering complex materials, structure, working condition, environment, etc. on load capacity and lubricating property, the optimum design of transmission tribology performance based on new engineering complex materials of blending modification of plastics and rubber with nanometer material, especially the key technology of efficient driving medium and system based on new engineering complex materials was studied; by studying bond strength of nonmetal with metal, and structure design based on elastohydrodynamic lubrication theory, consequently, innovation design theory and method of efficient transmission system was raised based on resources saving and environment amity, and then high performance transmission system based on new engineering complex material is developed.

长径比(L/a)是水润滑塑料台金轴承设计中一个重要的参数，通过实验表明在实际设计中可以诵整应用装置中轴承的长径比以减小摩擦系数。最终得出最佳长径比值2≤L/d<4

本文介绍了超高分子量聚乙烯材料的基本性能及其在各方面的应用情况