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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >THE SELECTION AND TESTING OF COMPRESSION SEAL AND CHAMBER COATING MATERIALS FOR THE PIVOTAL™ ENGINE
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THE SELECTION AND TESTING OF COMPRESSION SEAL AND CHAMBER COATING MATERIALS FOR THE PIVOTAL™ ENGINE

机译：PIVOTAL™发动机压缩密封件和腔室涂层材料的选择和测试

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摘要

The Pivotal™ Engine was conceived by Pivotal Engineering LTD to overcome some of the inherent problems associated with a conventional two-cycle engine, such as high wear rates and friction losses due to piston tilt and large port openings, reliability problems due to lack of control over piston temperatures and high oil consumption. The Pivotal engine is an Otto cycle two-stroke engine. The engine is assembled from 500cc modules utilizing a rectangular piston that pivots on a plain bearing at one end. The pivoting motion of the piston allows coolant to enter the piston through the centre of the pivot giving temperature control of the combustion chamber while restraining the piston so it has little or no contact with the chamber walls. Although friction loss, temperature control and oil consumption problems have thus been mitigated, prototype engines still experienced problems with high compression seal wear rates. Compression seals run in a reciprocating motion along a flat chamber wall, somewhat analogous to piston rings in a conventional engine, although velocity varies along the seal length. The goal of this research is therefore to select and test compression seals materials to obtain an adequate working life in the Pivotal engine. Based on the rotational tribometer results, the most promising chamber coating so far is plasma sprayed iron with molybdenum and the most promising seal material is reaction bonded silicon nitride.
机译：Pivotal Engineering LTD构思了Pivotal™发动机，以克服与传统两冲程发动机相关的一些固有问题，例如高磨损率和由于活塞倾斜和较大的端口开口造成的摩擦损失，由于缺乏控制而导致的可靠性问题超过活塞温度和高油耗。枢轴发动机是奥托循环二冲程发动机。该发动机由500cc模块组装而成，利用矩形活塞在一端滑动轴承上枢轴转动。活塞的枢转运动允许冷却剂通过枢轴的中心进入活塞，从而在限制活塞的同时对燃烧室进行温度控制，使其几乎不与燃烧室壁接触。尽管由此减轻了摩擦损失，温度控制和机油消耗问题，但原型发动机仍然遇到压缩密封件磨损率高的问题。压缩密封件沿着平坦的腔室壁往复运动，这与常规发动机中的活塞环有些相似，尽管速度沿密封件长度变化。因此，本研究的目标是选择和测试压缩密封材料，以在Pivotal发动机中获得足够的工作寿命。根据旋转摩擦计的结果，迄今为止，最有希望的腔室涂层是等离子喷涂铁和钼，最有希望的密封材料是反应结合氮化硅。

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