J standard maintenance valve for main components. When inspecting and repairing the air compressor air valve, it must be noted that the gland of the air valve is 4 and is loose. The tilting of the gland may cause the valve to get stuck, so that the valve cannot work normally. When checking the valve, pay attention to it. The valve is closely attached. The adhesion of the valve directly affects the efficiency of gas production. Therefore, it is required that the valve seat should not have any defects such as abrasion, scratches or groove marks. If any of the above phenomena should be updated. Also check that the leaf Springs work well. It is found that the compression spring should be replaced when it is broken or loses its elastic force, and the spring force of each spring should be balanced to avoid uneven force on the crankshaft. The normal stroke of the valve is 256 2nimirnTij3l.6mmllftSHt.g The compressor is regularly cleaned of the valve and valve box every working month. When disassembling the valve box, the bonnet and the gas valve gland must be carefully cleaned with diesel oil, and then dried, wiped and smeared with the lubricating oil poured in the upper case. When cleaning the gas valve, the oil residue on the valve seat should be removed. Other things.
cylinder. When inspecting the cylinder, it is necessary to observe whether there is a longitudinal flaw on the inner surface of the cylinder. If there is a flaw in the depth of the longitudinal flaw, it shall not exceed 051 with two injuries. Must not exceed 0.3.
When there is a slight scratch on the inner surface of the cylinder, the semi-circular oil stone can be reciprocally ground in the circumferential direction of the cylinder wall until it is touched by hand without a noticeable feeling. For cylinder liners, check that the fit is firm. Low pressure of 5190. The cylinder interference 1 with an interference of 0.19.10 is 0 mm. If it is loose, replace it immediately. D. When checking the maximum allowable wear and cylindricity error of the cylinder, it should meet the requirements of 1.
When the cylinder diameter is cracked along the cylindricity error cylinder wall around the cylinder, it should be replaced. The ellipticity of the cylinder or cylinder liner of the new air compressor is allowed to be no more than 004, and the ellipticity of the air compressor in use shall not be greater than 3, 1. The crude sugar content of the cylinder face is 16.
piston. Check the piston for cracks, strains, and severe nodules should be replaced. Piston 1; the clearance of the cylinder is! 223, Allow i noon wear 1.5mm. Stage piston Q12Q15mm, allow wear L2. Combined with the piston rod, the perpendicularity error of the piston end face to the piston axis does not exceed 0.04 in the length of 1001. The side of the piston ring groove and the digging axis Degree error, 1., 1 degree + over. 4. The side of the piston ring groove and the side of the piston axis are only 88 fit.
The cylindricity error outside the piston is not more than 9 grades, and the surface roughness is not more than 16. After the hole of the piston is worn, the hole can be enlarged to prepare the piston pin, but the expansion + is more than 2 sides of the planting degree + person. 6 The outer diameter of the cold cold does not exceed 8 for the coaxiality of the piston axis.
Check the piston should also pay attention to whether the pin between the piston pin and the piston is intact and reliable. If the pin is misaligned or broken, the piston pin will be pulled out to the left and the inner wall of the cylinder will be damaged. The radial clearance between the piston pin and the connecting rod tile is 00380064, which allows the wear to be 0.3. In addition, it is necessary to carefully check whether the oil drain hole in the oil ring groove of the piston is unblocked to prevent excessive oil from being introduced into the compressed air and affecting the compressed air. quality. The piston at the top of the piston is also bad. In the upper part of the piston, two wind rings and oil ring are divided. Piston ring inspection should pay attention to whether its shape is broken, mark 02, the outer ring and the cylinder should be close to each other, and the gap should exceed 50. The above phenomenon must be replaced with a new cold ring.
The inspection of the oil ring is almost the same as that of the piston ring, but it is worth noting that in order to prevent the lubricating oil from flowing from the chassis to the other side of the piston and passing through the air valve into the air ring 1 oil ring, the side has a sharp touch! The rib has a narrow face that is in contact with the inner wall of the cylinder and a slanted tapered face at the back of the side. The piston ring oil ring has a counter gap of 20 in the cylinder, and the piston ring oil ring has a counter gap of 15 mm in the cylinder.
link. Check if the connecting rod is bent, deformed and deformed. If it is serious, it should be replaced in time. After the connecting rod is assembled, the coloring inspection must be carried out, and the eccentric load phenomenon must not occur. The connecting rod head should be tightened in time. The radial clearance between the crankshaft shaft diameter and the connecting rod bush is 0460.75. 1. The comprehensive dialing is used to serve the various departments. , 1 place. The old alloy has been consumed! 25, must, the factory is installed in the connection; 1. The adjustment pad of the first head, when the alloy wears 2, the tile should be replaced. The wear of the crankshaft is checked at least two months. When checking the connecting rod, you should also pay attention to whether the fastening screw, the opening pin, the oil tweezers, etc. are intact.
Crankshaft. When inspecting the crankshaft, the crankshaft journal wear must not exceed 003. If there are cracks, scratches, scratches, deformations, etc., repair or replace it. If there is a slight axial crack on the journal, or grinding to eliminate cracks; if there is radial crack on the journal, replace the new crankshaft. The crankshaft journal surface has a coarse sugar content of not more than 16. When installing the crankshaft, care should be taken to adjust the axial movement amount. The series momentum should be within the range of 0406. The crankshaft should be inspected twice a month.
1 round. In order to ensure that the sea liner is working properly, it should be inspected every two months. If the gears of the large and small gears are not properly adjusted, the wear of the wheel tooth indexing circle thickness should not exceed 07! . The tooth is broken, cracks should be replaced, slight uneven wear and slight scratches on the tooth surface, and the tooth surface can be repaired, lubricating oil. The air compressor is generally lubricated and extends into and out of the oil at each of the connecting rods. The lubricating oil is splashed onto the crank link mechanism and the inner surface of the cylinder to lubricate the friction parts. Lubrication on the gear side is when the gear is rotated and its teeth are fed into the kneading surface to bring the oil up. Lubricate the pinion gear. Before adding the lubricating oil to the crankcase, thoroughly clean the inside of the crankcase. Do not mix waste oil, gasoline, kerosene, etc. in the lubricating oil to avoid affecting the quality and danger of the lubricating oil. When refueling, it should be filtered, and no mechanical impurities of the particle size 100081 will be thrown into the crankcase with lubrication. Pay attention to keep the oil level in the crankcase. The highest oil level is lower than the lowest oil level 4 on the upper surface of the oil mark. The oil level is flat and 3540mm.
The lubricating oil of the air compressor should be replaced twice in two months. For the new air compressor, the oil should be changed 23 days in the initial stage of use, and according to the practice of the oil 2 conclusion, the air compressor should be repaired scientifically and reasonably according to the maintenance standard. Not only improve the quality of electric locomotives, but also reduce the accident rate of air compressors, make electric locomotives run more reliably, and ensure the safe production of coal transportation.
Learn electric traction professional. Now the Longgang Hegang Branch Railway Transportation Department is engaged in technical work.
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