<nav id="jzh21"><p id="jzh21"></p></nav>
<source id="jzh21"><mark id="jzh21"></mark></source>
<input id="jzh21"></input>
      1. <source id="jzh21"><div id="jzh21"></div></source>
        <video id="jzh21"></video>
        1. <u id="jzh21"></u>
        2. banner2
          banner2
          banner1
          banner1
          Position:
          首页
          /
          service

          After sales service

          Analysis of common faults of pistons in internal combustion engines

          service

          Piston head strain

          Feature

          Longitudinal pull marks on fire shores and ring shores, general ring bonding

          Reason

          1. Long-term overload operation.
          2. Insufficient coolant and poor thermal conductivity.
          3. Poor lubrication, such as oil below the standard surface of the oil pool.
          4, the oil supply is not allowed, the injector is invalid.
          5, the use of inferior fuel oil, the formation of too much carbon, so that the ring is stuck,
          Causes the piston to overheat.
          6. The air entering the cylinder is unclean and contains more impurities.
          7. The piston cooling nozzle has failed.

          service

          Piston skirt strain

          Feature

          The skirt presents a torn longitudinal pull on one or both sides.

          Reason

          1. The body is deformed, and the connecting rod is bent to appear off-cylinder.
          2. The failure of the cooling system causes the temperature to be too high or too low.
          3. Improper assembly.
          4, the running-in is not good, and directly carry out heavy work.
          5. The lubricant is not properly selected or the lubrication system is faulty.
          6, "three filters" failure, coarse abrasive particles inhaled into the cylinder resulting in scratches.
          7, overload, speeding.
          8. The abnormal combustion caused by the failure of the oil supply system causes the engine to overheat.

          service

          Piston four-point strain

          Feature

          Irregular scratches appear near the sides of the pin hole of the piston.

          Reason

          1. The heat dissipation system is faulty (if the thermostat is not installed, the temperature is too low).
          2. Frequent cold start.
          3, low temperature overspeed, overload exercise.
          4, low temperature, low speed for a long time running.

          service

          Hot crack at the top of the piston

          Feature

          The edge of the combustion chamber is cracked in the radial direction.

          Reason

          1. Overload operation.
          2, the oil supply is not allowed, the injector fails, causing local overheating.
          3. Continuous alternating load.
          4. Elements such as sulfur and antimony in inferior fuel oil cause high temperature corrosion and accelerate the formation of hot cracks.
          5. The boost pressure is too high.

          service

          Piston ring melt loss

          Feature

          The bank is abnormally damaged and is melted

          Reason

          1. The high temperature and high pressure gas will break the ring, and the well will melt and damage the ring bank at the broken ring; the ring will move up and down in the ring groove, causing damage to the ring bank: in severe cases, the top surface of the ring will be broken, causing the cylinder to be pulled. Cylinder head and other phenomena.
          2. The piston is biased to the side, and the other side of the ring is subjected to excessive force to cause breakage.

          service

          Top burn through

          Feature

          A breakdown hole appears in the combustion chamber.

          Reason

          1. Overload operation.

          2. The oil supply is too large.
          3. The falling of foreign objects.
          4, work rent violence. If the fuel cetane number is too low, the injector fails, and the fuel injection is too early.

          service

          Piston pin hole break

          Feature

          The piston breaks down from the oil ring groove and breaks.

          Reason

          1, Abnormal impact, causing it to break at the weak oil ring groove.
          2, poor lubrication, so that the engine occurs to hold the tile, burn the shaft phenomenon, the connecting rod will break it.
          3. After the piston head holds the cylinder, the piston pin pulls it off.
          4, the relevant components with large clearance, the impact of the reciprocating inertial force, causing fatigue fracture.
          5, overload operation.
          6, improper assembly.

          service

          Piston ring break

          Feature

          The fracture is in multiple stages and the fracture is irregular.

          Reason

          1. The oil supply is not allowed, the injector fails, causing high temperature and high pressure.
          2. The components are out of balance or damaged, causing high frequency vibration.
          3. Overload operation.
          4. Improper assembly.
          5. The cylinder sleeve is released or the ring groove is worn out, and the impact is repeated.

          service

          Early wear

          Reason

          1. The air filter fails and the filter element is unqualified.
          2. Poor lubrication and poor quality of lubricating oil.
          3, the oil supply is not allowed, the cylinder.
          4, long-term low temperature operation.
          5. Improper assembly.
          6, not in accordance with the provisions of running-in, overspeed, overload work.
          7. Use inferior fuel.

          service

          Engine crash cylinder

          Feature

          Engine related parts are abnormally damaged or broken.

          service

          Piston top surface and fire shore ablation

          Feature

          The fire shore and top surface are honeycomb or pear-shaped

          Reason

          1. improper adjustment of fuel supply advance angle
          2. The injector failed, secondary injection and oil drop occurred, and the afterburning was severe.
          3. The load is running.
          4 Insufficient intake air.
          5. Supercharger failure.
          6. Intercooler is dirty

          service

          Circlip release

          Feature

          The end of the pin hole of the piston is melted,
          There are pits of different depths on the inner wall of the cylinder liner.

          Reason

          1. Improper assembly.
          2. The circlip deformation (exceeding the fatigue strength).
          3. The quality of the circlip is unqualified.
          4. The connecting rod is bent.

          service

          Skirt break

          Feature

          The piston is broken or cracked along the thrust surface.

          Reason

          1. The clearance between the cylinders is large and the cylinder is severe.
          2. The connecting rod is severely bent.
          3. Work is rude.
          4, poor lubrication (such as oil pool oil and low).

          service

          Piston top valve

          Feature

          The top surface has an impression of a valve collision.

          Reason

          1. The phase of the valve is not allowed.
          2. The valve clearance adjustment is too small.
          3. The cylinder head gasket is too thin.
          4. The connecting rod and the journal, the camshaft journal and the bearing bush are too large.
          5. The valve spring is broken.

           

          service

          Piston top valve

          Feature

          The inner cavity is black red or red, often accompanied by a sticky ring, a head burning, pulling a cylinder, burning oil and the like.

          Reason

          1. The fuel supply is not allowed and the injector is invalid.
          2. The piston cooling nozzle has failed.
          3. Overload operation.

          service

          Ring break

          Feature

          The second ring bank is partially broken along the circumference.

          Reason

          1, the burning is not normal, the work is rude, leading to fatigue and fracture.
          2, overload operation, excessive gas pressure to break the shore.
          3, partial cylinder, partial sticky ring.
          4. Abrasive wear increases the gap between the ring and the ring groove, the cylinder sleeve is released, and the reciprocating inertial force breaks the ring.

          service

          Piston eccentric wear

          Feature

          The piston wears asymmetrically, often accompanied by burning oil, pulling cylinders, and exhausting.

          Reason

          1. The body is deformed.
          2. The connecting rod is bent or twisted.
          3. Improper assembly.

          service

          Top color exception

          Feature

          The combustion chamber and the top surface are grayish white, accompanied by burning oil.

          Reason

          The fuel is not qualified.

           

          新东岳集团有限公司

           

          电 话:0538-2890808
          传 真:0538-2821338
          邮 箱:dongyuegongsi@163.com
          销售热线:0538-2880999
          地址:山东省东平县经济开发区

          二维码
          游戏电玩城