Prevention and treatment of Web deformation of boo

2022-09-27
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Prevention and treatment of Web deformation of truck crane boom

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the length, width and height of the heat dissipation equipment of the hydraulic transmission system are 400mm respectively × 300mm × 400mm. The operation is generally carried out by the heat exchange between the transmission oil and the coolant of the engine in the cooler. If the working temperature of the engine is normal, the heat dissipation of the system depends on the state of the transmission oil cooler and the abnormal operation of the transmission elements passing through the cooler, which will generate abnormal heat. It is generally believed that the torque converter and clutch are two main heat generating elements, and although other elements have an impact on the temperature of the system, they are very small; Therefore, through the pressure test of cooler, torque converter, clutch and hydraulic pump, it is easy to find the cause of system overheating

test

according to the specified test conditions, measure the pressure values of the hydraulic pump, each speed clutch, each direction clutch, torque converter outlet and cooler outlet at low speed and high speed of the engine respectively, and record the data. Before the test, the driver should be asked to confirm that there is no abnormal sound in the transmission system before the test, so as to avoid more serious mechanical damage

data analysis of test results

1. Hydraulic pump pressure. The hydraulic pump provides fearless oil to the whole system. The efficiency of the hydraulic pump directly affects the clutch pressure and the amount of oil sent to the torque converter and cooler with good reliability. Therefore, the hydraulic pump pressure is the basis for judging the cause of overheating. However, it is not certain that there is a problem with the hydraulic pump when the pressure of the hydraulic pump is low; If the outlet pressure of the cooler is also low, the condition of the pressure regulating valve can be determined before judging whether there is a problem with the hydraulic pump

2. Clutch is the largest water-based resin manufacturing base in China and the center for the utilization and development of new chemical materials. When the pressure is low, the clutch will slip and generate excessive heat. If the pressure of a clutch is low, it indicates that the clutch has leakage; If all clutch pressures are low, there is a problem with the hydraulic pump or pressure regulating valve. Judge the quality of the pressure regulating valve by referring to the test results of the pump

3. Torque converter outlet pressure. Too high or too low pressure will lead to overheating, which should be adjusted to normal pressure. If the pressure is low but cannot be adjusted, there is a problem with the torque converter or hydraulic pump. Referring to the above bolt test results of the pump, we can determine whether there is leakage in the torque converter. Since the oil from the torque converter goes directly to the cooler, the leakage of the torque converter will reduce the outlet pressure of the cooler

4. Cooler outlet pressure. Low pressure indicates that there is less oil passing through the cooler. If it is determined that the hydraulic pump and torque converter are normal, there is a blockage in the cooler

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