Large vertical electromotor swings analysis of oily cause of formation and processing measure

Summary: Analysed the oil cylinder on electromotor to swing oily cause of formation, introduced to handle measure, because electromotor itself structure is designed,solved effectively unreasonable and the trouble swinging oil that cause. Went to the lavatory the maintenance of aircrew, the safety that assured aircrew moves. Keyword: ; of head of oily; thrust is swung to block oily group outside oily; is being swung inside one, at present our country produces preface and already threw in using large and medium-sized aircrew of vertical water pump (or hydraulic turbine aircrew) the electromotor of form a complete set (or dynamo) , every is used rare oil-lubricated sliding bearing, have many long-term since the worry that gets the problem that swing oil, affect the riding quality of aircrew directly, give unit move, safeguard and the overhaul maintains added a lot of workload. Author classics is installed for years and move for a long time, collected this respect first-hand data, the practical measure that summary gives to swing oil how to be handled to electric machinery of type of this kind of structure, swing oil to be with the electromotor of pumping station of Liu old gully only now exemple, undertake concrete analysis and introduce processing measure. This pumping station sets 4 3100ZLQ38, 4.

Aircrew of axial-flow pump of 2 large vertical, total flow is 150 stere / second, distribution motive TL2200, 40/3250, voltage is 6KV. Among them when 1# electric machinery moves, the overflow base of oil cylinder gives oil for half canal originally, every 2 hours of oil that spill over measure the left and right sides that amount to 9L, the oil level inside oil cylinder emerges excessive, swing oil serious. Officer unit ever made manufacturer and former installation and overhaul unit wait please for many times will stand to undertake the overhaul in the light of special subject of the problem that swing oil, the result all is paid no attention to want. June 2003, we combine aircrew overhaul, undertake handling to swinging the place of oil, the via 4 many months test after overhaul, aircrew moves normally all the time, the phenomenon that swing oil got be controllinged effectively. 2, electric machinery swings oily cause of formation the analysis is large and medium-sized to vertical electric machinery swings oil, must want to analyse its to swing oily attribute, just can apply to disease treat, from go up at all solve the problem that swing oil. Electric machinery swings oily attribute to divide kinds big in all: One kind is oily from electric machinery axis and swing between the circle that block oil piece, abbreviation: Oil is swung inside; Another kind is oily from cover board and thrust head or with on swing between oil cylinder wall piece, abbreviation: Oil is swung outside. Swing oily circumstance to undertake auspicious fractionize analyse to two kinds respectively below. (one) inside swing what oil swings inside oil to form basically have 3 kinds of factors. 1, aircrew is moving in, when rotating as a result of electric machinery rotor, heat up the agitate on gas flow direction, majority of this hot air current is to pass exhausting duct eduction, but still having a share is along electric machinery the axis rises, via blocking the clearance eduction of oily circle and thrust head journal. When its clearance passes small, or diameter of stabilized voltage aperture is too small, the wind speed of eduction increases namely, because rotor pursues ceaselessly,1 negative pressure is formed inside swing oil to rotate, make underside of thrust head journal comes thereby between fat face form 1 main shaft easily 2 thrust head 3 spill port 4 block oil to encircle local negative pressure (vacuum) , right now the fat face inside electric machinery oil cylinder is sucked by its negative pressure Gao Chong excessive, climb to block oily group more, clearance of oil bead edge falls, swing splash electric machinery to decide rotor surface, form inside swing oil (graph 1) . 2, appear as a result of thrust head and place of production treatment of the group that block oil different level is prejudicial poor, or the assembly when installation is prejudicial poor, move rise, because the oil inside oil cylinder rotates when the centrifugal power that prejudicial place produces, form extremely inhomogenous oily link, for instance: Thrust head and design clearance slants between the circle that block oil small, and prejudicial, opposite eccentricity is bigger, come so, thrust fillet moves the dormant oil inside oil cylinder to rotate ceaselessly, be equivalent to one-sided heart pump working, the pressure that makes oily annulus generation larger is pulsatile, and up change is oily, the oil that change goes is poured out of along the clearance between the circle that block oil and thrust head, swing splash electric machinery to decide rotor surface, the another cause of formation that oil swings inside generation (graph 2) . Pursue 2 prejudicial form inhomogenous inside the graph that swing oil on the low side of 3 height of the circle that block oil are formed inside swing oil 1 block oil to encircle 2 thrust head 1 main shaft 2 thrust head center of 01 thrust head centers of 02 the circle that block oil 3 oil level 4 the circle that block oil 3, because design, opposite at on the high side of the oil level inside oil cylinder (by fight heavy screw 1/2 to set oil level) , make the action that block oil is less than since the circle that block oil thereby, arrive when oil when formulary height position, the oil inside oil cylinder crosses coping of the circle that block oil easily, swing splash electric machinery to decide rotor surface, form inside swing oil, still can make the oil level inside oil cylinder too low at the same time, cause its temperature on the high side, immediate impact aircrew moves normally. (2) , outside the element that oily formation throws to basically have 2 sides outside swinging oil: 1, aircrew moves in, because the whirl of thrust head, lens board is driving the dormant oil inside oil cylinder to move, make because fat face leaves the action of mental efforts to crock wall all around emerge tall, at the same time as a result of the condenser inside oil cylinder, guide the pullback of the component such as plain bearing liner, bring about oily generation to splatter or churn, make easily oil bead or oily mist the ease of aperture China and foreign countries from oil cylinder cover board, oil is swung outside forming (graph 4) . 2, when aircrew moves, as sliding bearing temperature elevatory, make the oil inside oil cylinder and air bulk expand thereby, generated internal pressure, below the action of internal pressure force, because breath of the respirator on oil cylinder is not expedite, and spiracle diameter slants small or slant little, cannot breathe normally, the pressure that forms oil cylinder inside and outside thereby is poor, force the oily mist inside oil to expand along with gas, from ease of China and foreign countries of cover board aperture, oil is swung outside causing (graph 5) . 3, processing is narrated on measure put together, swing oil internally, must combine aircrew overhaul, according to afore-mentioned inside the cause of formation that swings oil measures check integratedly, handle measure certainly. Accordingly, the equipment blemish that swings oil to may be being caused in overhauling a process and the part that install blemish and place undertake necessary measure an examination. This station electric machinery blocks the unilateral clearance between oily circle and thrust head to be 3mm, according to old installation experience, this designs unilateral clearance to should be more than 5mm, this electric machinery blocks reason the circle outside oily circle must undertake turning is handled, make its clearance achieves 7mm; Opening of two stabilized voltage increased in be being overhauled previously, but because bore diameter is lesser, should the aperture of 10mm of will former diameter (4 aperture) overall spread is 16mm for the diameter; In order to reduce a wind rate, make between underside of thrust head journal and fat face form local negative pressure not easily, avoid face of the oil inside oil cylinder to suck phenomenon of Gao Chong excessive, eliminate thereby swing oil; Additionally this electric machinery is disassembling check is measured to give amlposition of the frame on electric machinery in the process 4.

5mm, cause installation error, make gap of unilateral of the smallest part only between the circle that block oil and thrust head 0.

75mm, opposite eccentricity increases, reason this the frame on installation general locates afresh. Because electric machinery axis is prejudicial,avoided, the phenomenon of inhomogenous oily annulus produces when the dormant oil inside oil cylinder rotates, the circumstance after transforming is shown 6 times like the graph. The circle blocking oil that passing small processing measure to encircling height because of oil is being blocked when the design is will former on the low side raises certain height, make up for its to set a plan 6 on the circumstance after oil cylinder is transformed plan medium blemish, can eliminate this kind of appearance that swing oil. The processing measure that 2 thrust head covers 1 main shaft 3 crocks to swing oil external checks processing namely cover board is sealed, the 4 stabilized voltage aperture after expanding block oily group after 5 turning or undertake handling to the respirator mesh of device, make respirator breath expedite. Increase spiracle diameter when necessary, or increase breath to suck Kong Shu to solve. Classics processing, the difficult problem that oil swings inside this electric machinery is solved thoroughly, switch on the mobile phone try move 72 hours, it is normal that aircrew moves, without any phenomena that swing oil, achieved expectant result. 4, last word aircrew swings oil, not only can make go up oily quantity decreases inside oil cylinder, oily temperature rise is fast, and the dip corrode that because electric machinery gets oil for a long time,still meets, cause electromotor surface putty to cross the demote below insulation of much, coil, the safety that affects unit moves. The electric machinery that additionally every uses slip plain bearing liner all differently existence has rate similar case, friend author thinks, the article is contained certain catholicity and practical, can offer manufacturer home and the person of the same trade such as use unit and installation sheet to consult. Bibliographical reference 1. Du Gang sea.

Installation of aircrew of large pumping station and overhaul.

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Press of irrigation works water and electricity 2. The machine that water annulus generates electricity is installed.

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Irrigation works press 3. Installation of aircrew of large water pump and overhaul.

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Zhang Qian of teaching material of training class of technology of backbone of large pumping station is entered (1972---) , male, engineer, pumping station stationmaster, basically pursue the job such as installation of equipment of Electromechanical of large pumping station, overhaul, day-to-day moving management and technical reformation. E-mail:zHqj7@126.

Comtel:0527-513163513951371881 Zhou Yuanbin (1967---) , male, strong point, senior engineer, basically pursue the job such as the day-to-day management of the water conservancy project such as large brake station and technical reformation CNC Milling