怎么防范挖掘机油液过热?

日期:2019-11-26   源头:http://www.sefibox.com/
  1. 油过热的毁伤
  1. Danger of oil overheating
  挖掘机液压体系中液压油的过热会飞扬液压油的热坚定性和化学坚定性。油的粘度会飞扬和增长泄漏;液压泵、气缸、阀门等部件磨损增长;滑阀应用不当,构成了变乱。
  The overheating of hydraulic oil in excavator hydraulic system will reduce the thermal and chemical stability of hydraulic oil. The viscosity of oil will reduce and increase leakage; the wear of hydraulic pump, cylinder, valve and other components will increase; the improper operation of slide valve will cause accidents.
  2. 油温过热缘故缘故原因
  2. Cause of oil temperature overheating
  液压体系的过热的紧张缘故缘故原因是差异理的设计,外部热源的影响,如引擎,劣质的选择液压油或粘度的改造,油不敷,过低的压力安全阀阀芯的调停或频繁方法,污垢的散热器和冷却电扇的速率淘汰。
  The main causes of the overheating of the hydraulic system are unreasonable design, the influence of external heat sources, such as the engine, the poor selection of hydraulic oil or the change of viscosity, the lack of oil, the adjustment or frequent action of the valve element of the low pressure safety valve, and the decrease of the speed of the dirt radiator and cooling fan.
  3.防范油过热的步伐
  3. Measures to prevent oil overheating
  (1)革新设计,经心制造。
  (1) improve the design and make it carefully.
  (2)探求外部热源,消弭或隔绝。要是加油量超越跨过油标线,挖掘时机在阻尼器转向进程中孕育发生大批热量,并转达给液压泵,招致体系升温。阻尼箱内的油应排放到范例油位。
  (2) find external heat source, eliminate or isolate. If the amount of oil filling exceeds the oil mark, a lot of heat will be generated during the turning process of the damper, which will be transmitted to the hydraulic pump, causing the system to heat up. The oil in the damping box shall be drained to the standard oil level.
  (3)液压油按挖掘机泵、阀组件江苏快三开奖结果产品说明书中规矩的液压油品牌选择。要是规格的阀门模范元件是缺失的,可以依据泵来选择。主泵为柱塞泵,其许用粘度范围为4~ 76mm2 /s,选择16~ 47mm2 /s为宜,变乱压力一样伟大在35mpa以上;变乱温度为5~40℃时,可选用l-hm32、l-hm46抗磨液压油,变乱温度为40~80℃时,可选用l-hm46、l-hm68抗磨液压油。
  (3) the hydraulic oil shall be selected according to the hydraulic oil brand specified in the product manual of excavator pump and valve assembly. If the size of the valve type element is missing, it can be selected according to the pump. The main pump is a plunger pump, its allowable viscosity range is 4 ~ 76mm2 / s, 16 ~ 47mm2 / S is suitable, and the working pressure is generally above 35MPa; when the working temperature is 5 ~ 40 ℃, l-hm32 and l-hm46 antiwear hydraulic oil can be selected, and when the working temperature is 40 ~ 80 ℃, l-hm46 and l-hm68 antiwear hydraulic oil can be selected.
  (4)美满挖掘机液压体系的技术条件查抄制度,细致实行一样伟大查抄和维护。查抄各衔接处可否有泄漏,油箱内的油量可否富饶,泵的变乱温度可否正常,过滤器可否窒息等,可以有效防范液压油温渡过高。
  (4) improve the technical condition inspection system of excavator hydraulic system, and carefully implement daily inspection and maintenance. Check whether there is leakage at each connection, whether the oil volume in the oil tank is sufficient, whether the working temperature of the pump is normal, whether the filter is blocked, etc., which can effectively prevent the hydraulic oil temperature from being too high.
加长臂挖掘机出租
  (5)查抄溢流阀调停后的压力、弹簧、阀芯、阀座。依据安全阀的启闭特性,调理压力(启闭压力)应大于体系格外压力的10%。然后观察弹簧可否弯曲(其轴与端面不垂直)、断裂,如有必要应互换;查抄主阀芯和先导阀芯可否完全流利,应及时洗濯阻尼孔,防范窒息时;查抄主阀芯,如修复阀芯不机动,需重新组装,如体系杂质过多,构成主阀芯不机动,需互换液压油;查抄先导阀芯可否与阀座打仗精良。密封油外貌的圆度方向应控制在5 ~ 10微米。
  (5) focus on the pressure, spring, valve core and valve seat after the adjustment of relief valve. According to the opening and closing characteristics of the safety valve, the regulating pressure (opening and closing pressure) shall be greater than 10% of the rated pressure of the system. Then observe whether the spring is bent (its shaft is not perpendicular to the end face), broken, and replace if necessary; check whether the main valve core and pilot valve core are completely unblocked, and clean the damping hole in time to prevent blocking; check the main valve core, if the repair valve core is not flexible, it needs to be reassembled, if there are too many system impurities, the main valve core is not flexible, it needs to replace the hydraulic oil; check whether the pilot valve core is with the valve The seat contacts well. The roundness error of sealing oil surface shall be controlled within 5-10 μ M.
  (6)查抄并洗濯盘管和多管冷却器。洗濯时,先用氢氧化钠和碳酸钠去油,再用温水洗濯。用20%~30%稀硫酸溶液浸泡洁净40分钟,水温40~60℃。之后用温水洗濯。在10%氢氧化钠溶液中浸泡,洗濯15分钟,溶液温度40~60℃。之后,用蒸汽或温水洗濯。由于冷却器造型相比庞大,要是散热器积垢太难以扫除,应举行互换。
  (6) check and clean coil and multi tube cooler. When cleaning, first use sodium hydroxide and sodium carbonate to remove oil, and then use warm water to clean. Soak in 20% ~ 30% dilute sulfuric acid solution for cleaning for 40 minutes, and the water temperature is 40 ~ 60 ℃. Then wash with warm water. Finally, soak in 10% sodium hydroxide solution, wash for 15 minutes, and the solution temperature is 40 ~ 60 ℃. After that, wash with steam or warm water. Due to the complex shape of the cooler, if the radiator scale is too difficult to remove, it should be replaced.
  (7)查抄冷却电扇胶带,依据需要调停。
  (7) check the cooling fan tape and adjust it as required.

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