液压升降机齿轮故障的判断方法

1、升降机齿轮表面疲惫
升降机齿轮齿面点蚀，点蚀多发生在节线四周。当接触应力和轮回次数超过一定限度时，两齿面会产生微小的裂纹，接触应力是随时间而变化的脉动轮回应力，随轮回次数的增加，裂纹逐步扩展，就会使裂纹之间的金属微粒剥落下来形成齿面疲惫点蚀。
Lift the gear tooth surface pitting, pitting occurred around the pitch line. When the contact stress exceeds a certain limit and the number of rounds, the two tooth surface microcracks generated contact stress change with time and the stress pulse of the cycle, with the cycle number increased, the gradual expansion of the crack, the crack will cause the metal particles between the flaking off the formation of tooth surface fatigue pitting.
2、监督及齿面磨损
初期划伤会发展成严峻划痕或咬接起皱，在整个齿顶形成无数沟槽或皱纹状的痕迹，若不及时处理，这些划痕会造成更严峻的后果。由于这些与滑动方向相同的划痕会划破油膜造成金属接触。其形成的原因可能是减速器轮齿轴线不平行，安装不准确，设计错误、润滑油粘度太低、流量不足或温度太高。另外灰尘、杂质等污物进入齿面会加剧磨损。严峻时齿廓被破坏，使传动不平稳，有噪音，甚至轮齿折断。
Early scratches will develop into severe scratches or snap wrinkle, numerous signs throughout the addendum shaped grooves or wrinkle formation, if not promptly treated, these scratches will cause more severe consequences. As these scratches with the slide in the same direction will cause the metal-contact film scratched. The reason may be formed not parallel to the axis of gear teeth, the installation is not accurate, design errors, oil viscosity is too low, the flow rate is low or temperature is too high. Also dust, dirt and other impurities into the tooth surface will increase wear. When severe tooth profile is damaged, so that the transmission is not smooth, noise, and even tooth broken.
3、齿轮塑性变形
施工升降机减速器轮齿表面金属变形主要是由于负荷过重，尤其是冲击性负荷，这种金属变形就是所谓的塑性变形。较软或韧性较高的金属原料更易泛起塑性活动。
Metal construction hoist reducer tooth surface deformation is mainly due to overloading, especially impact load, the metal deformation is called plastic deformation. Softer or higher raw material more ductile metal thrown plasticity activities.
4、减速机轮齿断裂
负荷过重所造成的断裂表面较为粗拙，成粒状。金属疲惫所造成的断裂通常是由细小的裂缝经由长时间蔓延而成。断口处非常光滑，通常都可以看到金属疲惫的出发点。
Overloading caused the fracture surface is more rough, granulated. Metal fatigue fracture is often caused by long small cracks from spreading through the. Fracture is very smooth, usually you can see the starting point for metal fatigue.
　　

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