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工程机械液压系统各功能和动作的实现是由高压液压油通过管道的传输来完成的。在液压系统的配管中大量采用了钢管。高压油液在管道中运动时,由于有沿程阻力、局部阻力,以及流速大小和方向的变化等,使高压油液处于紊流状态,从而对管壁产生撞击和涡旋,以及压力波在管内的振动和轰鸣,造成水击现象,水击压强过大会造成管道破裂,水击压强过低,会使管壁产生空穴和气蚀;同时,钢管内壁的物理、化学特性还影响油液的清洁度和油液的动力传输。这些都影响着钢管的使用性能和使用寿命。因此,工程机械液压钢管在使用前,其内壁要进行磷化处理。
Construction machinery hydraulic system to achieve the various functions and actions by the high-pressure hydraulic oil transmission through the pipeline to complete. A large number of steel pipes are used in the piping of the hydraulic system. High-pressure oil in the pipeline movement, due to the resistance along the way, the local resistance, as well as changes in the size and direction of the flow rate, so that the high pressure oil in turbulent state, resulting in tube wall impact and vortex, and the pressure wave in Tube vibration and roar, resulting in the phenomenon of water hammer, water hammer over the General Assembly caused by pipe rupture, water hammer pressure is too low, will cause wall cavitation and cavitation; the same time, the physical and chemical properties of steel pipe wall also affects the oil Cleanliness and fluid power transmission. These affect the performance and service life of the steel pipe. Therefore, the construction machinery hydraulic pipe before use, its inner wall to be phosphate treatment.