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在液压传动机床上,常常会遇到液压爬行的问题。由于爬行现象一般是机械、液压、润滑等性能的综合反映,有时较难排除。如我厂1964年大修一台捷克制造的6V/2000万能磨床时,工作台发生了低速爬行。经过多方努力未能排除。后来我们在活塞上钻了一个0.8mm的小孔,使高压油缸产生了微量连通,顺利地克服了爬行现象。该机床于82年10月第二次大修,修后发现,工作台运行速度在300mm/min以下时有爬行现象。而且低速时工作台拖动无力,甚至一个人就能轻易推住。经检查发现活塞上的小孔被污物堵塞。畅通后,工作台拖动力显著增加,两人用力推不住。而且最低速达到70mm/min时,无爬行现象,达到并超过了原机床规定最低速度为80mm/min的出厂要求。以上实践说明小孔防爬的方法简单易行,效果明显。在设备维修中有一定的实用价值。小孔防爬的基本原理涉及流体力学的理论知识,
In the hydraulic transmission machine, often encounter hydraulic crawling problems. As the phenomenon of crawling is generally a comprehensive reflection of mechanical, hydraulic, lubrication and other properties, and sometimes difficult to rule out. As I plant overhaul in 1964, a Czech-made 6V / 2000 universal grinder, the table occurred slow crawling. After many efforts failed to rule out. Later, we drilled a small hole in the piston 0.8mm, the high-pressure cylinder produced a trace of connectivity, successfully overcome the creeping phenomenon. The machine tool in October 1982 the second overhaul, repair found that the workbench running speed below 300mm / min crawling phenomenon. And low-speed table dragging weakness, and even a person can easily push. After inspection found that the piston hole is blocked by dirt. After smooth, workbench drag significantly increased, two hard to push. And the lowest speed reached 70mm / min, no crawling phenomenon, to meet and exceed the original machine tool minimum speed of 80mm / min factory requirements. The above practice shows that the method of small hole anti-climb is simple and effective, the effect is obvious. In the maintenance of equipment has some practical value. The basic principle of pinhole anti-climb involves the theoretical knowledge of fluid mechanics,