Case study of attaint of electric machinery of Xi Menzi servo

Application of electromotor of three-phase communication servo is wide, but through moving for a long time hind, can produce all sorts of breakdown, judge breakdown reason in time, undertake corresponding processing, it is to prevent breakdown to expand, assure a when equipment moves normally main job. One, the electromotor after electrify cannot turn, but as good as is noisy, also do not have peculiar smell and fume 1. Power source of breakdown reason ① was not connected (at least two-phase was not connected) ; Fusing of ② frit silk (at least two-phase fusing) ; ③ sheds relay to be moved too smally too; ④ controls equipment wiring mistake. 2. Trouble removal ① checks switch of power source loop, whether does office of box of frit silk, wiring have breakpoint, repair; ② examines reason of frit silk model, fusing, change new frit silk; ③ adjustment relay rectifies calm value and electromotor to cooperate; ④ corrects wiring. 2, the electromotor after electrify does not turn have buzz 1. Winding of rotor of breakdown reason ① has open circuit (one photograph breaks a string) or power source breaks phone; Fault of termination of derivative line beginning and end or winding interior receive ② winding instead; Contact of loop of ③ power source becomes loose, osculatory resistance is great; ④ electromotor load passes big or rotor gets stuck; Voltage of ⑤ power source is too low; ⑥ small-sized electromotor is assembled too close or the grease inside bearing is excellent; ⑦ bearing gets stuck. 2. Trouble removal ① finds out breakpoint to give repair; ② checks winding polarity; Judgement winding extreme is correct; ③ tightens the wiring screw that solid shakes, judge each connect with avometer false receive, give repair; ④ is decreased carry or fish eliminates mechanical failure, whether does ⑤ examination accept formulary scale the law is received by accident; Whether to because power source lead is meticulous,make press had fallen big, give correct, what ⑥ heavy new clothes deserves to make is agile; Change eligible grease; ⑦ rehabilitate bearing. 3, electromotor starts difficulty, when rated load, electromotor rotate speed under rated rotate speed more 1. Voltage of power source of breakdown reason ① is too low; ② face receives law electric machinery by accident; ③ rotor opens solder or rupture; Local coil fault receives ④ rotor, receive instead; V/LIT all over the ground number increases when winding of ③ rehabilitate electric machinery overmuch; Overload of ⑤ electric machinery. 2. Trouble removal ① measures power source voltage, try to improve; ② is corrected receive a standard; ③ examination opens solder and breakpoint and repair; ④ fish is received by accident place give correct; ⑤ restores to circle correctly several; ⑥ is decreased carry. 4, electromotor sky carries electricity lopsided, three-phase differs big 1. Termination of from beginning to end of winding of breakdown reason ① is wrong; Voltage of ② power source is lopsided; ③ winding existence circles a short circuit, coil is received instead wait for breakdown. 2. Trouble removal ① is checked and correct; ② measures power source voltage, try to eliminate lopsided; ③ removes winding trouble. 5, the noise when electromotor moves has ① of reason of abnormal knocking breakdown out of order bearing wears away or is the foreign body such as arenaceous bead inside oil; ② rotor core becomes loose; ③ bearing is short of oil; Exorbitant or voltage of ④ power source is lopsided. Trouble removal ① changes bearing or clean bearing; ② overhauls rotor core; ③ is cheered; ④ is checked and adjust power source voltage. 6, vibration of the electromotor in moving is bigger because breakdown reason ① wears away bearing gap is too big; ② air gap is inhomogenous; ③ rotor is lopsided; ④ runner shaft bends; ⑤ shaft coupling (leather belt annulus) coaxial is spent low. Trouble removal ① overhauls bearing, change when necessary; ② adjusts air gap, those who make is even; Dynamic balancing of ③ corrective rotor; ④ alignment runner shaft; ⑤ is new and corrective, make accord with a regulation. 7, bearing overheat 　 1. Overmuch or slippery fat of breakdown reason ① is too little; ② is oleaginous and bad to contain impurity; ③ bearing and journal or upright lid cooperates undeserved (too loose or too close) ; The aperture inside ④ bearing is prejudicial, brush with axial photograph; ⑤ electromotor carries a lid or bearing lid was not installed smooth; The shaft coupling between ⑥ electromotor and load is not corrective, or leather belt is too close; Too big or ⑦ bearing space is too little; ⑧ electromotor axis bends. 2. Trouble removal ① adds grease by the regulation (the 1/3-2/3 of cubage) ; ② changes to lubricate cleanly slippery fat; ③ crosses rehabilitate of loose usable binder, answer too closely car, grind journal or carry the aperture inside the lid, those who make suit; ④ repairs bearing lid, eliminate brush a dot; ⑤ is assembled afresh; ⑥ is new and corrective, adjust leather belt tension; ⑦ changes new bearing; Crankshaft of ⑧ school positive electricity or change rotor. 8, electromotor overheat is fumy even voltage of power source of breakdown reason ① is exorbitant; Voltage of ② power source is too low, electromotor takes rated load to move again, electric current crosses ambassadorial winding to give out heat; ③ is repaired when demolishing winding, use heat to tear open a law undeserved, burn core; ④ electromotor overload or start often; ⑤ electromotor is short of, two phase operation; After ⑥ rewind on winding dip lacquer inadequate; Dirt of surface of tall electromotor of ⑦ environment temperature is much, or ventilated path jams; Trouble removal ① reduces power source tension (if adjust power supply transformer to divide contact) ; ② heightens power source tension or change lead of thick power supply; ③ overhauls core, remove trouble; ④ is decreased carry; By the regulation frequency control starts; ⑤ restores three-phase to move; ⑥ uses dip lacquer and technology of vacuum dip lacquer 2 times; ⑦ cleans electromotor, improve environmental temperature, use drop in temperature measure CNC Milling