Supply Liupanshui Carter 320D excavator rotary joint oil spill how maintenance center

Supply Liupanshui Carter 320D excavator center rotary joint oil spill how maintenance Troubleshooting: [139] - [9639] - [3931], slewing ring peripheral leakage of liquid oil phenomenon Master Meng aircraft in use for nearly a year when the new machine. the beginning is not very serious spill, about six months after the spill serious, and finally to the extent of the leakage of hydraulic oil daily several kilograms of Liupanshui Carter 320D excavator center rotary joint oil spill how maintenance Troubleshooting: First check rotary gear lubricant inside, no increase or decrease phenomenon, indicating there is no leakage rotating mechanism. Finally remove the center swivel joints, sealing parts found after the disintegration of its top are corrosion and wear, abrasion depth of 0.35-0.40mm, and surface irregularities uneven, has been unable to ensure proper sealing. Because off the machine rotary bearing parts are enclosed structure, the leak can not be directly observed, the exclusion of the possibility of leakage of each pipe joint, the fault point set to rotary gear and center the rotary joint. If the rotary shaft seal and rotary gear motor output shaft leaks, spills or central rotary joint, it can cause the annular groove slewing ring and get off platform composed filled with hydraulic oil, and finally emerges from the slewing ring and The situation on the train connections around the interstitial effluent Liupanshui Carter 320D excavator center rotary joint oil spill how repair method: the central rotary joint portion of the core has been erosion repair, another set of its welding process, welding wire corresponds to ensure that does not occur leakage, the sealing parts of the surface ground to the original size (to meet the surface hardness and anti-corrosion requirements, after grinding the best chrome), the replacement of worn seals, namely the elimination of oil leakage after installation. 1. Carter 320D excavator slewing When the pilot hydraulic circuit system operated rotary valve 1 operation, the pilot oil flows through the pilot control valve 1. Pressure switch 8 and the rotary main valve 2, the flow of the pilot oil pressure switch 8 reaches 1.4MPa, the pressure switch operation of the parking brake solenoid reversing valve 5 is energized, the pilot oil into the parking brake 4, lifting the brake. flow rotary valve of the main pilot pressure, push the main valve to the appropriate reversing direction from the main hydraulic pump high-pressure oil into the swing motor starting Rotary, the planetary gear reducer by twisting, pushing back wheel rotation. When you need parking, pilot control valve 1 returns to neutral, then the main valve spool ends 2 at the return spring is also back in action bit due to the inertia of the excavator, the back wheel via planetary gear drive rotary motor 3, when the hydraulic motor into a pump, oil return to the original side of the drain. but the main valve closure effect, oil increasing pressure within the tube, up to the set pressure 28MPa, the relief valve 6 open the pressure relief oil through the check valve 7 back to the tank. At the same time, the rotary motor is applied also to the planetary gear corresponding brake torque, forcing back wheel deceleration braking. This process is about 1-2s, since the rotary disk rotation inertia continues to drive the motor, the hydraulic force on one side of the original oil return alternately rising and falling, the relief valve 6 at this time frequently turned off, by Swing Motors continued to back wheel brake until it stops, the set relief valve has a protective effect on the motor. In order to avoid damage to the oil return side pressure is too high rotary motor, the original one-way inlet 2. Carter 320D excavator slewing In the rotary motor housing built with friction plate-type parking brake mechanism and job structure Carter 320D excavator swing structure is composed of a swash plate piston fixed displacement motor, planetary gear reducer, big swing ring gear, slewing bearing composition. high pressure relief valve of the brake mechanism, the role of both the brake mechanism is not Liupanshui Carter 320D excavator rotary joint oil spill how maintenance center, the preferred fly excavator plant maintenance more professional!