There are many reasons for the unsmooth operation of electric flat cars, such as excessive heat generation, gear damage, serious wear and tear, long and short axle failures, etc. Don't panic when you encounter these problems, hoisting machinery teaches you how to solve them correctly. There are many reasons for the unsmooth operation of electric flat cars, such as excessive heat generation, gear damage, serious wear and tear, long and short axle failures, etc. Don't panic when you encounter these problems, hoisting machinery teaches you how to solve them correctly. ① Various reasons that cause the gear pump to rotate poorly can cause the gear pump to heat up, and the troubleshooting methods can also be implemented by referring to it. ②The oil viscosity is too high or too low. Reselect oil. ③Severe friction between side plate, shaft sleeve and gear end face. Repair or replace. ④ High ambient temperature, small fuel tank volume, and poor heat dissipation will cause the pump to heat up. Should be handled separately. ② If the viscosity of the selected oil is too high or too low, it will cause the output flow of the pump to decrease. You should use oil with qualified viscosity. (1) Gear ①Tooth shape repair: Use fine emery cloth or oil stone to remove the strained or ground into a polygonal shape, then change the gear meshing surface and properly conduct construction hoist
alignment, and then clean it; The severely worn parts that can be observed with the naked eye should be replaced. ②End face repair: the gear end face is worn out due to relative rotation with the bearing seat or front and rear covers, and will start at light. Grinding methods can be used to grind and polish the burr marks; when the wear is severe, the gear should be placed on a surface grinder. Grinding. It should be noted that the two gears must be ground on a surface grinder at the same time, in order to ensure that the thickness difference between the two gears is within 5μm; at the same time, the perpendicularity of the end face and the hole and the parallelism of the two ends must be both within 5μm. In the range, use oilstone to blunt the sharp edges, but don’t chamfer, just make sure there is no burr or flash. ③When the meshing surface of the gear is worn, use oil stone to remove the burrs caused by the wear; at the same time, change the meshing position of the gear so that the original non-meshing tooth surface can be meshed, which can not only ensure its original working performance , But also extend the working life of the gear. The output flow of the construction hoist is insufficient. The abrasion of the pump body of the construction hoist mainly occurs on the side where the inner cavity is in contact with the gear ring, and mostly occurs on the oil suction side. If the pump body is symmetrical, you can turn the pump body 180 degrees before use; if the pump body is asymmetrical, you need to use the electroplating bronze alloy process or brush plating method to repair the worn parts of the cavity in the pump. (3) Bearing race The wear of the bearing race is generally on the end face contacting the gear and the inner hole contacting the needle. When the end face is worn or the thread is pulled up, the 4 bearing races can be placed on a surface grinder, and the side that is not in contact with the gear is used as the reference to grind the end face smoothly. The accuracy should be guaranteed within 10μm. Bearing races generally wear less, if they are severely worn, they can be ground; or appropriately increase the bore diameter and re-select needle rollers; or replace the bearing races. (4) The failure of the long and short shafts is mainly due to wear at the contact point with the needle bearing. If the wear is slight, it can be repaired by polishing (and replaced with a new needle bearing); if it is severely worn or broken, it needs to be repaired by chrome plating or reworked. When reprocessing, the keyway on the long and short shafts must meet the requirements of parallelism and symmetry of the axis line; the clearance between the flat key installed on the shaft and the keyway of the gear must not be too large; the shaft must not be in the inner hole of the gear Radial swing occurs; the coaxiality of the mating surface of the shaft journal and the mounting gear part shall not exceed 10μm, and the coaxiality of the journals at both ends shall not exceed 20-30μm. It is not difficult to deal with the uneven running of the electric flat car, because this is a small problem, and it can be solved within a long time to find our manufacturer. The boss who needs lifting equipment can visit our factory and establish long-term cooperative relationship.
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