By Wu Yue


　　I have noticed that in recent years, in the sales of piling machinery equipment as a whole, apart from rotary drilling rigs, the largest sales volume is that of power head reducers. Since 2014, sales have been more than 700 during peak periods and no less than 500 during slack periods, averaging around 600, making it a relatively stable sales “runner-up” in piling machinery.
　　Compared with the sales of various types of piling machinery, the sales volume of power head reducers reflects three obvious characteristics: one is position volume, another is usage volume, and the third is quality. The so-called position volume refers to the average annual sales reaching 600, indicating that the power head reducer component holds an important position in piling machinery and is a main component of piling machinery; the so-called usage volume refers to the fact that the sales volume of power head reducers is less than the total sales volume of various drilling rigs, proving that power head reducers have a certain level of quality among all equipment; otherwise they would not be durable and would at least equal or exceed the total sales volume of various drilling rigs. The so-called quality refers to the fact that power head reducers have consistently maintained the “runner-up” sales position. Apart from human factors, this also shows that although they have a certain level of quality, the quality has not yet reached the optimum, which requires continuous efforts in technology and quality. 　　As the main component of piling machinery, how can the power head reducer extend its service life and achieve durability? It seems that apart from manufacturers needing to further improve technology and quality, human maintenance factors are also very important. Here, the main focus is the maintenance of the power head, and the following points must be done well: 　　First, the lubricating oil of the reducer installed in the power head reduction gearbox should have its oil level checked regularly, and the oil must be replaced promptly after it turns black. When a new power head is used for the first time, new oil must be replaced after 1-2 months of operation; oil must be replaced after the first 2,000 cubic meters or 3 oil changes; thereafter, depending on working conditions, oil should be replaced every 3-6 months or every 4,000 cubic meters.
　　Second, during operation, if the oil temperature is found to rise significantly and exceed 100℃, or if abnormal vibration and noise occur, use should be stopped, and operation should resume only after the cause is identified and the fault is eliminated.
　　Third, maintenance of the piling rig power head should be carried out according to reasonable maintenance rules and regulations established by the user unit. When maintaining the piling rig power head, during repair, the order and positions of disassembled parts should be recorded, and the original shapes of the parts should be protected. When reassembling after repair, the original order and positions of the parts should be restored.
　　Fourth, the user unit should keep detailed records of the operating conditions of the power head and problems found during inspection and repair. In addition, after each construction operation is completed, the mud and sand on the drill pipe, drill bit, sliding support, and split-type fixed support should be cleaned off, and lubricating oil should be applied to the connections. At the same time, damage and deformation of components during disassembly should be avoided. Disassembled bolts, nuts, etc. should have mud and sand removed and be coated with rust-preventive oil for use in the next construction operation. Correctly maintain the piling rig power head. If the drill bit is severely worn, it should be replaced to avoid wearing down the spiral blades on the spiral drill pipe, while also safeguarding your safety.
　　People need maintenance; poor maintenance shortens lifespan. The same is true for machinery. With the same quality and the same use by different users, different service lives will result. This is the importance of maintenance. Of course, the maintenance methods mentioned above are simple, and there are more in practice. We need to earnestly summarize them, so I will not say more here.