1Abstract introduces the working principle of the hydraulic system of the still-type 180-type clearing machine. Brother, 象, elephant and ä¿! method. It also gives the large-scale road maintenance machinery of the Shenshen 180 Screening Machine from 1984. The equipment has been aging, the failure rate is increased, and the safety and punctuality of the overhaul construction are brought about after 15 years of use. Great impact. According to the practice of many years of maintenance, the author introduces the common faults and maintenance methods of the working principle of the hydraulic system of the 80 clearing machine, in order to find the fault location accurately and quickly in the actual work, and carry out emergency treatment and repair to ensure the smooth construction. , 1 running clutch hydraulic system working principle The cleaning machine is divided into high-speed running operation at low speed, these actions are controlled by the hydraulic clutch in the axle gear box. Each axle has two sets of hydraulic clutches, which are responsible for the interval travel and operation, respectively. 1. The hydraulic motor pump assembly output pressure oil enters the human 00 clutch through the hydraulic position change Valve, and the person 0 is the working low speed running clutch. The high-speed clutch, the hydraulic motor pump assembly and the person, the buckle clutch constitute a clutch drive mechanism, the 4 reel, the clutch release mechanism, and the entire cleaning machine has 4 clutch drive mechanisms.
The hydraulic motor pump assembly of the axle 1 axle of the front bogie is connected in series, sharing a driving hydraulic circuit and being driven by a hydraulic pump. The hydraulic motor pump assembly of the rear bogie 1 axle 3 axle 4 is also in series and is driven by a hydraulic pump.
2 often fault phenomenon running clutch fluid 1 jade system fault now clutch shaft Yutong University internal combustion engine professional. On electricity. Clutch shaft pressure refers to the pressure of 0234 axle clutch into 0 and 0. When normal, the relief valve is set to 1.5. The pressure switch is set to 1.2 plus 1 when it is lower than 1.2 state; it will slip with the 0 clutch friction plate. Burn the friction lining. The main phenomenon of the main shaft pressure is low. Unstable power. ; and; the pressure of the separator is not a 1 card force, especially Lele; no card force; there is a force 0 and buckle clutch without pressure and so on.
3 Inspection method To repair such faults, first check whether the hydraulic oil level is correct, whether the oil quality is good, and whether the engine speed is normal or low 21501.
Low axial pressure means that the pressure of the human 00 clutch is lower than 1.2; the net slab slip is damaged. A protection circuit was set up on the abdomen 80 dipping machine when the axial pressure was lower than 1.2 rivers; at 1 o'clock, the 80 cleaning machine did not travel. The maintenance procedure is as follows: adjust the pressure of the relief valve to be higher than the end of the upper pressure, and the adjustment does not work. Enter the hall and check the hydraulic directional control valve. It is flexible if you push it by hand. If it is not flexible, replace or repair it.
Check the lock ring on the shifting clutch axle gearbox 2 shaft and replace if worn.
Check that the hydraulic motor pump assembly is connected to the inner spline of the nylon sleeve and should be replaced if damaged or worn.
Check the various parameters of the hydraulic motor pump assembly motor pump. Try the stage. Adjust parameters or replace damaged motor pump.
2 into 0 and the clutch pressure does not cause 1 hydraulic motor pump assembly; 2 hydraulic reversing; 3 overflow valve; 4 medium, 5 filter; 1; 6.4, through valve 7 lubrication period normal value.
â—Ž Check the state of the ä¹ shaft gear ç˜ 2 shaft seal ring, replace the wear to check 6; the clutch seal ring, replace the worn seal ring.
30 has pressure and no pressure, especially pressure 5 has pressure. Check if the hydraulic directional control valve is flexible, if it is not flexible repair or replacement.
(4) With the clutch, no effort, check the amount of lubricating oil in the gear box of the car. If the lubricating oil is insufficient, check the 2-axis sealing ring of the axle gear box, replace the worn sealing ring, and check the inner pump spline of the motor pump assembly. Replace the damaged nylon sleeve.
Check the hydraulic directional valve for repair or replacement.
4 Troubleshooting example The shaft pressure is normal.
Analysis of the 12-axis and no pressure at the same time indicates that there is no pressure oil input at the common input end of the motor assembly, the drive is removed, and the chestnut shaft is broken. After the vegetable shaft is replaced, the engine is started and the shaft pressure is normal.
Force, 4-axis pressure is normal.
Analyze 3-axis people; with, 0 clutch without pressure. The interpreter has a question about the public road and the 4 axis 1 and the Zale force stop, indicating that the hydraulic pump is working normally. Remove the oil supply line of the pump in the 3-axis motor pump assembly and start the engine to find no pressure oil output, so it is likely to be on the motor pump assembly. The motor pump assembly was disassembled and it was found that the inner spline nylon sleeve of the motor and pump was worn. Newly processed inner spline sleeves. After the restoration. Drive the engine. The 3-axis pressure is restored to normal. When the 180-screen cleaning machine is in operation, the 4-axis operation is carried out, the pressure disappears and the wind is running, the wind is constant, the pressure is 12.3, and the hooking pressure is normal.
Ming drive hydraulic pump, the motor pump assembly works normally, just people, control the oil circuit there is leakage. Check the axle gearbox for people 0 and where; the shaft end is twisted. It was found that the clutch seal oil chamber seal ring was damaged. After replacing the seal ring, the engine was started and the pressure returned to normal.
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