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Analysis of construction machinery 5 large site repair methods
1 "Shred wire" repair method that is screwed into the body or parts of the body, forming a plugging seal role. For example, a 6135 engine block cracks (length 30mm). First of all in the cracks at both ends of a cracked hole, and then press 1, 3, 5, 7 ... ... drilling sequence of tapping and screwing into the copper screw, then the order 2,4,6,8 ... ... drill screw hole , Use the same method to screw into the copper screw. Drilling should ensure that the adjacent two 1/3 of the overlap of the screw, screwed into the depth of the best with the same wall thickness, and finally with a hand hammer tap the head to seal the screw diameter of 6 ~ 8mm It is advisable. Another ZL50 loader fuel tank hole leak, pore size is about 4mm. Find a diameter of 5mm steel red hole will be expanded, the use of curling to increase the wall thickness of the tank, tap the M6 ​​screw and screw into the hole to plug the seal. 2 "shift" repair method that is to use its own parts transposed installation or change its installation location and direction to restore the original machine features. For example: ①There is a ZL40 loader main hydraulic pump damaged, decomposed and found that front and rear side plate wear layer of bronze and passive gear tooth surfaces have different degrees of wear and tear. According to front and rear side plates and passive gear tooth surface wear are single-sided wear, and the front and rear side plates and the main and passive gear structure and the same size of the same characteristics, so the front and rear side plate swap position Installation, and the passive gear flip 180 ° installation, so that the front and rear side of the bronze wear layer friction opposite to the original, so that the passive gear tooth surface to be worn as a face to restore the normal operation of the loader. ②W4-60C excavator working pump and ZL50 loader steering pump are CBG2 gear pump, the installation of the same size, but the opposite direction of rotation. According to CBG series gear pump, the pump body and the front and rear side plates are all rotated by 180 ° and reassembled to realize the characteristic of changing the rotation direction, which can be exchanged after being reassembled. ③ When the engine flywheel ring gear due to unilateral wear and tear affect the normal start, but also the ring gear upside down to install and reuse. 3 "alternative" repair method that is drawn on the spot to replace the damaged construction machinery parts. Mainly used for gaskets, oil seals, tubing, radiators and wires and other temporary alternative. For example: ①There is a W4-60C excavator, due to hydraulic oil radiator damage, serious leakage of oil, so decided to hydraulic oil compulsory and natural integrated cooling way to a single natural cooling. This will meet the cooling requirements of the system, restore excavator work. ② There is a ZL40 loader boom hydraulic cylinder piston seal damage, the use of triangular tape instead of piston seal, so that it quickly returned to work. Specifically, first cut off a section of ordinary waste atrial tape, the length of the piston seal with the outer circumference of the same length, and then grinding its top plastic, its top width than the piston seal ring groove width of 10 ~ 15mm, and its The joint is cut into 45 ° angles to increase the contact area and reduce leakage. ③ usually in the repair of the construction site, you can also use the following methods: Replace the fuel line with ordinary plastic hose return hose, plastic bottle with Coca-Cola instead of low-pressure gaskets to replace gaskets, gas cables instead of gasoline engine ignition system Divided cylinder line, with cigarettes with 502 glue plugging, with a rubber ring to do the return spring. 4 Short-circuit Repair Method Short-circuit the tubing, gas pipe, or circuit in the hydraulic system, pneumatic system, fuel supply system, and electrical equipment of a construction machine to connect the pipe or circuit directly across the part that has failed. For example: ①There is a ZL50 loader as the driver did not let off the cooling water at night, causing the oil radiator cracked, then we remove the oil radiator, the oil pipe directly connected with the body oil gallery, the oil radiator Water pipes shorted, restored the use of performance. ②There is a TL-180 fast bulldozer steering system relief valve failure, the use of "open circuit method" to make it back to work, about to open the relief valve pilot valve spool hole, or directly into the relief valve into the hole Closed. It should be noted that the driver in the operation must make the engine throttle in the middle position, not working in the big throttle conditions. ③ A W4-60C excavator working in a sudden damage to the pump, hydraulic system paralyzed, we use a three-way connector A pump and the B pump directly connected to the drain, the B pump alone to the hydraulic system, timely recovery Hydraulic system work. ④ There is a ZL50 loader flow distribution valve stem spring break, sometimes unable to change pieces, decided to remove the stem, so that the valve into a multi-channel connector, connecting oil. Although this system has lost the role of oil distribution regulation, but it can temporarily carry out shoveling operations. In particular, short discard method is only an emergency repair method, not long-term use. 5 "bone" repair method that is bundled, welded, plywood, sticky and other methods to quickly repair damaged parts. For example: ①There is a W4-60C excavator, rear axle wheel reducer axle housing outer shoulder staggered rupture, wheel center ring bearing outer ring tear (width 15mm). If the replacement cost nearly ten thousand yuan, then decided to fracture the site to take "bone method" for welding repair. The ring-shaped tear part of the fracture cut off (the axial length of 455mm shortened), and then choose 45 high-quality carbon structural steel as a bone material. Its machining, the selection of high-strength E5016 (J506) electrode, the use of double-sided V-groove, DC reverse multi-section welding reverse, only 1h to complete the repair task. ② There is a ZL40 loader hydraulic tubing rupture, it was decided to saw from the rupture, with steel pipe that is, both ends of the pipe processed "barb", inserted into the hydraulic tubing, the depth of about 100mm, and tied with 8 # wire, and finally Both ends of the wire head screwed to prevent the oil pressure is too high to make the pipe off from the tubing, the rapid recovery of the operating performance of the machine.