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      Abnormal in the course of carriage

      Number of visits: Date:2015-08-04 16:17:33
      Abnormal in the course of carriage
      According to the abnormal situation, the formation causes can be divided into the following several:
      1 gear pump operation but the car does not lift or lift very slowly. This situation is the most direct reason is the lack of oil, leading to the lack of oil pressure, valve stem control is not in place, the valve valve abnormal, valve pad on a foreign body, one-way valve loose plug the pipe, other hydraulic lines damaged, resulting in serious leakage, serious shortage of oil, at this time, should be based on different circumstances to take corresponding treatment methods, such as replacement of gear pump, maintenance, replacement of hydraulic cylinder, hydraulic pipe, install check valve, etc.. It is worth noting that, when the allocation of valve stalls are not allowed, its internal check valve is not strict, but also may lead to an empty compartment can not stop.
      2 the car lift difficult, lift slowly move to move. Carriage lifting is difficult due to the following aspects: insufficient oil tank; tank filter or pipeline jam; pump are at fault, non oil; distribution valve return oil valve stuck in the back of the location of oil; a serious imbalance in the relief valve, leakage of high-pressure pump; lifting cylinder and limiting valve card to pass to the main distributing valve gas path switched on for a long time; insufficient air pressure of the air storage cylinder; force taking device, gear pump working poor; hydraulic oil is not clean impurity card death distribution valve.
      The following several aspects: the back circuit is not smooth, the lifting cylinder friction resistance is too large; the lifting cylinder limit valve sealing is not strict, the lifting cylinder sealing ring seal is lax, resulting in insufficient oil pressure; gear pump efficiency is reduced, the fuel tank is insufficient, the gear pump can not reach the specified amount of oil, pipeline serious blockage or leakage.
      3 cars can not fall after the lift. This happens due to the following: a distributing valve sliding lever is not in place; piston rod bent and deformed; sometimes lift tilting mechanism kinematic pair due to contaminated debris, for a long time without possible lag phenomenon of death; improper operation, lifting, angle of more than maximum lift angle design, mechanism, dead.
      4 the lift angle of the car or not smooth. This fault occurs generally in two cases: one is the lack of oil, the two is the oil into the air. When the amount of oil is insufficient, the oil pressure is not reached, the car can't lift to the maximum angle, and the process of the rise is not stable.
      5 car lift can not be stopped at any position or car after the fall of their own. Car lift can not stop at any position for the oil too dirty, so check valve seal is not strict, or distribution valve, back to the valve seal is not strict due to the car after the whereabouts of the reasons: one-way valve stuck; lifting cylinder sealing ring sealing ring, the distribution of the valve stuck, not fully in place; pipeline leakage.
      The abnormal failure of heavy dump truck carriage lifting in the process of exclusion
      1 check the oil level and oil leakage. First, see if there is enough oil level, the problem should be added in accordance with the regulations. Check the power control mechanism is normal; oil, gas road, there is no leakage phenomenon, if necessary, it should check whether there is no plug. Check the oil pump, distribution valve, limit valve and other work is good, the lifting cylinder is sealed well, if necessary, to be repaired. The operating system of the various control valve malfunction, should be replaced by a new. Hydraulic oil is not clean, causing the oil circuit plug or hydraulic shortage, the action is slow, the car is not in place should be replaced with hydraulic oil. Oil pump transmission or gear shaft damage, not running and internal leakage is serious, should be changed to repair.
      2 maintenance of hydraulic transmission system. Oil pump main, driven gear shaft journal and bearing wear, will cause the increase of the meshing gap, resulting in the oil pump displacement, the work of the stability of the decline, the noise. Gear end cover and pump body end cover or end bearing wear, scratches and grooves, will cause the oil pump internal and out of oil leakage, so that the circuit increases, and thus from the oil chamber through this circuit leakage and oil into the oil chamber, oil pump pressure and flow down. The abrasion damage caused by fault, find out the reasons, for instant repair.
      3 hydraulic system maintenance key points. Assembly is disassembled and parts should be carefully placed in the cleaning solution soaking and cleaning clean, avoid bump and scratches, parts cleaning work is very important, the assembly is strictly prohibited dirt and metal impurities into so as not to aggravate the parts wear, card lag and failure. In strict accordance with the provisions of the selection and use of the work of oil, the need to filter, to ensure the use of oil cleaning; the use of the system should be no leakage phenomenon. In maintenance, it should avoid the knock on the part and prevent the damage of the part.
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      TypeInfo: Industry News

      Keywords for the information:Dump lifting anomaly 

      国产在线精品视频二区
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