| Precise matching part technology condition simple inspection method |
In peacetime, repair and maintenance of machinery, due to the lack of inspection equipment and specialized equipment could help observe, touch, and feel to identify auscultation Plunger Couples, filling valve dual injection Tsui and the quality of the good or bad and whether continue to be used. Are respectively as follows: 1. Plunger Couples inspection 1.1 Identification of experience (1) According to the plunger with dual sliding pieces determine whether the situation can. The plunger will be clean-and 45 ° tilt, pulled out the length of the plunger 1 / 3, to any location regardless, Songshou after themselves in the role of the plunger can slowly whereabouts. But not too fast or the whereabouts of stagnation card, it shall be repaired or replaced. (2) According to the plunger-and determine whether traces of wear and tear can Plunger wear mainly concentrated in the head and showed signs of wear gray, non-luminous. Test shows that the plunger diameter of 8.5 mm, when signs of wear head reached 4 ~ 5 mm wide, 10 mm long 9 ~, or using fingernails scraping, with a clear sense, can not generally continue to be used. Moreover, the blunt edge angular mill, spalling or corrosion phenomenon, as well as a plunger sets of cracks or holes in a deep scar can not continue to use it. (3) According to the plunger-and determine whether the sealing can A. plunger dual use of clean diesel clean, it will be pulled out of Inner plunger from the length of the plunger 1 / 2 around the plunger sets of hands were blocking the top of the axial hole and into the hole (GPS Hole, a small amount of oil into), and drop into the hole in the back of diesel, and then the plunger into the chute at the back of the hole slowly advancing. In promoting the process, if back into a hole in the bubble out, the plunger-and has been wear and tear, can not be used if no hole in the back into the bubble, only in the plunger back into the chute fast-exposed only when the diesel from the back into the hole quickly Jianchu, that can still be used. B. plunger in the middle or will be the largest supply position, and pushed on to the position, hand-blocked axial piston kit, and then pulled the plunger piston top is not exposed to the plunger into the hole, the feeling if to a vacuum suction, and Songshou, plunger can quickly return to the original position, that still continue to be used. C. directly in diesel engines make judgments on the basis of tightness Removed and connected to the high-pressure injection pump tubing, Mentou nut with a high-pressure injection pump tubing joints will be suffocated, and then rotate the flywheel, when the position to supply, if not harder still Pandong, the plunger has been wear and tear, can not be used, if not dynamic pull up or pull very hard on the plunger seal of good dual can continue to use. 1.2 in the locomotive directly identified In the inspection of the installation of a new fuel pump injector or work normal fuel injector, fuel injection pressure will be raised to 1.96 × 104kPa (200kg/cm2), the pendulum to the crankshaft to supply fuel pump, fuel pump can be if the normal injector fuel injection, the plunger-and may continue to use, or replaced with new pieces. 2 oil - and check valve 2.1 Identification of experience (1) with the naked eye observation A. When filling cone valve seal the seal ring with subsidence, and contact width greater than 1 mm, it is not appropriate to continue to use. B. When the decompression zone in the surface all traces of vertical groove wear, do not see the roughness of the original, should be repaired or replaced. C. When filling holes with valve and the valve seat surface corrosion, cracks and peeling metal to be replaced. (2) Engine checks Removed from the high-pressure injection pump, tubing, decompression to put Crankshaft, when the flywheel on only transferred to the compression point, if the high-pressure injection pump tubing connectors are diesel outflow, the filling valve has been wear and tear, can no longer use, otherwise still continue to be used. (3) filling valve hole out from the valve seat (not all out), with a thumbs block valve seat under the oil hole, and then gently pressing filling valve, where the pressure, if the filling valve to on the shift itself, be deemed a good seal. (4) slightly loosened the valve seat upper high-pressure oil pipeline connector nut, decompression to put Crankshaft, if the outward spray of diesel, has demonstrated technology of the oil valve dual normal, if only out of diesel bubble, the filling Valve not sealed. 3 injector needle-and the inspection 3.1 auscultation law Injection Tsui normal working hours, and the sound is uniform and continuous "pyridazine, pyridazine" sound, injection pressure is too low, given the continuous and uniform, "Chi, Chi" sound, and with smoke. Needle card issuers, voice intermittently, with no fixed rhythm. Diyou nozzle when, there will be very close between the two sounds, exhaust release foam. 3.2 does not check the demolition (1) Fuel Injector removed from the cylinder, high-pressure pipeline to the field to good installation, will be placed in the accelerator throttle position. Decompression to put single-cylinder diesel engine crankshaft, multi-cylinder engine hand pump pumping, such as fuel injection simply neat, good atomization, no Diyou phenomenon, the injector technology is good, or else the oil should be replaced first. (2) to put decompression crankshaft, such as the emission of diesel into line with this note Tsui injector fuel injection or face serious permeability have Diyou phenomenon must be replaced with new pieces. (3) Act feeling Engine operation, the cylinder by hand touch, if not pulsating feel that the tank is faulty, even if parts of the plunger and the oil valve-and technology is good, then the cylinder fuel injection Tsui card death, to be replaced Dual pieces. |
