石油钻机盘式刹车副材料的摩擦磨损性能研究

为提高深井石油钻机盘式刹车副的摩擦学性能和使用寿命,研制开发了新型刹车盘表面堆焊材料和无石棉刹车块摩擦材料,并通过变温摩擦磨损性能实验,研究了刹车副的摩擦学性能。研究表明,刹车副具有良好的变温摩擦特性和高温抗热衰退性能,高温下的摩擦因数比较稳定;刹车块和刹车盘的磨损率均随温度的升高而增大,但刹车盘表现出相对稳定的耐磨性能。载荷对刹车副的摩擦因数影响不大,变化比较平稳;刹车块和刹车盘的磨损率均随载荷的增大而增大,但刹车块表现出相对稳定的耐磨性。刹车副的摩擦因数随滑动速度的增加而增大,并趋向平稳;但速度对刹车块和刹车盘的磨损率影响不大,变化相对稳定。研制的刹车副材料能够满足石油矿场钻机作业的要求。

Research on Friction and Wear Performance of Disc-brake Pair Materials for Drilling Rig

In order to improve tribological performance and service life of disc-brake pair materials for drilling rig,build-up welding material of brake disc and asbestos-free material of brake block were developed.Tribological performances of new brake pair were studied by variable temperature friction and wear experiment.The research indicates that brake pair has better frictional characteristics in variable temperature as well as heat-fade resistance performance in high temperature and its frictional coefficient is much stable.Wear rate of brake block and brake disc increases when frictional temperature rises,however wear-resisting performance of brake disc is comparatively stable.Load has less influence on frictional coefficient of brake pair.Along with load increasing,wear rate of brake disc and brake block increases,but load has less influence on wear rate of brake block which has comparatively stable wear-resisting performance.Frictional coefficient of brake pair increases and tends to stabilize gradually along with sliding speed increasing.Speed has less influence on wear rate of brake block and brake disc which is comparatively stable.The developed brake-pair materials can meet the needs of drilling rig operating in oil field.