CN104467329A - Multi-system narrow gauge asynchronous traction motor - Google Patents
Multi-system narrow gauge asynchronous traction motor Download PDFInfo
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- CN104467329A CN104467329A CN201410809871.8A CN201410809871A CN104467329A CN 104467329 A CN104467329 A CN 104467329A CN 201410809871 A CN201410809871 A CN 201410809871A CN 104467329 A CN104467329 A CN 104467329A
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- stator
- narrow gauge
- motor
- traction motor
- multithread
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/10—Applying solid insulation to windings, stators or rotors
- H02K15/105—Applying solid insulation to windings, stators or rotors to the windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/12—Asynchronous induction motors for multi-phase current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/32—Structural association of asynchronous induction motors with auxiliary mechanical devices, e.g. with clutches or brakes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention discloses a multi-system narrow gauge asynchronous traction motor which comprises a stator, a rotor, an end cover, a bearing, a connection box and a speed measurement device. The stator comprises a stator iron core and a stator winding, the stator winding is of an integrated 200-stage insulation structure and is manufactured through the technology of matching solvent-free organosilicone impregnating varnish with vacuum pressure impregnating paint, a line outlet hole is formed in the end cover, a three-phase outgoing line is connected into the connection box through the line outlet hole, electrical insulation silica gel is poured in the connection box, steps are arranged at the two ends of the stator iron core, and a stator pressing ring is provided with pressing ring spigots matched with the steps. Due to the fact that air-gap-free insulation can be achieved through the structure and processing technology of the stator, the electrical insulation performance in the connection box is improved through the electrical insulation silica gel, the defect that the electrical distance is insufficient is overcome, and the size of a stator machine base can be suitable for a narrow gauge locomotive through the embedded cooperation structure of the stator iron core and the stator pressing ring. Therefore, the traction motor can be suitable for a narrow gauge railway, and suitable for 3kV direct-current and 25kV alternating-current power supply modes.
Description
Technical field
The present invention relates to railway locomotive electric drive technology field, particularly relate to a kind of multithread narrow gauge asynchronous traction motor.
Background technology
Narrow gauge refers to that gauge is less than the track of 1435mm standard gauge, and the width of most arrow gauge track is 1067mm or 762mm etc.Narrow gauge laying cost is few, and radius of curvature is little, and carriage weight is comparatively light, can be used for the larger route gradient.
Along with the development of power electronic technology, AC induction motor is provided with the governor control characteristics matched in excellence or beauty with direct current machine under the support of control system, AC induction motor also has the advantages such as less than direct current machine volume, power is large, efficiency is high, permanent merit wide ranges, maintenance are little, and therefore countries in the world are all in the utilization promoting alternating current asynchronous traction electric machine.Current domestic narrow gauge electric locomotive traction many employings DC Transmission, still do not have narrow gauge alternating current asynchronous traction electric machine, and the narrow gauge asynchronous traction motor being applicable to multithread operating mode more belongs to the brand-new field of technology.
Therefore, how providing a kind of narrow gauge asynchronous traction motor being applicable to multithread operating mode, is the current technical issues that need to address of those skilled in the art.
Summary of the invention
In view of this, the invention provides a kind of multithread narrow gauge asynchronous traction motor, be applicable to narrow gauge railway, and be applicable to 3kV direct current and exchange double-current power supply system with 25kV.
In order to solve the problem, the invention provides a kind of multithread narrow gauge asynchronous traction motor, be applicable to narrow gauge railway, be applicable to 3kV direct current and exchange double-current power supply system with 25kV, comprise stator, rotor, end cap, bearing, terminal box, speed measuring device, described stator comprises stator core and stator winding, the 200 class F insulation structures that described stator winding is integrated also adopt solvent-free organic silicon impregnating varnish to coordinate vacuum pressure impregnation technique to make, described end cap is provided with wire hole, three-phase lead-out wire accesses described terminal box by described wire hole, in described terminal box, embedding has electric insulation silica gel, described stator core two ends are provided with step, stator pressing ring is provided with the trim ring seam coordinated with described step.
Preferably, in above-mentioned multithread narrow gauge asynchronous traction motor, motor holding shaft and described stator pressing ring integrally casting shaping, described motor holding shaft both sides are provided with reinforcement.
Preferably, in above-mentioned multithread narrow gauge asynchronous traction motor, also comprise the interior axis of cone being arranged at machine shaft, described machine shaft is connected with gear box by the described interior axis of cone.
Preferably, in above-mentioned multithread narrow gauge asynchronous traction motor, described bearing is insulation bearing and adopts grease lubrication, and bearing grease sealing adopts labyrinth seal structure.
Preferably, in above-mentioned multithread narrow gauge asynchronous traction motor, also comprise gear box and bearing cap, the junction of described gear box and described bearing cap is provided with multiple drainback passage, and described drainback passage is provided with introversion baffle plate.
Preferably, in above-mentioned multithread narrow gauge asynchronous traction motor, the traction blower fan being arranged at traction electric machine air inlet is also comprised.
Preferably, in above-mentioned multithread narrow gauge asynchronous traction motor, the stator punching of described stator is provided with ventilation hole, and rotor punching and the rotor pressing ring of described rotor are equipped with ventilation hole.
Preferably, in above-mentioned multithread narrow gauge asynchronous traction motor, described end cap is provided with the air pressure balance chamber be communicated with inside and outside motor.
Preferably, in above-mentioned multithread narrow gauge asynchronous traction motor, described rotor comprises rotor core, sliver and end ring, and described sliver end is elbow structure.
Preferably, in above-mentioned multithread narrow gauge asynchronous traction motor, electric machine stand is provided with the anti-fall safe support for being connected with the anti-fall safety rope of bogie draw bar.
A kind of multithread narrow gauge asynchronous traction motor provided by the invention, be applicable to narrow gauge railway, be applicable to 3kV direct current and exchange double-current power supply system with 25kV, comprise stator, rotor, end cap, bearing, terminal box, speed measuring device, stator comprises stator core and stator winding, the 200 class F insulation structures that stator winding is integrated also adopt solvent-free organic silicon impregnating varnish to coordinate vacuum pressure impregnation technique to make, end cap is provided with wire hole, three-phase lead-out wire is by wire hole thereto, in terminal box, embedding has electric insulation silica gel, stator core two ends are provided with step, stator pressing ring is provided with the trim ring seam coordinated with step.
Because the structure of the stator winding in this programme and processing technology can realize air-gap-free insulation, improve insulating heat-conductive, reduce electric machine temperature rise, improve mechanical strength and the globality of motor insulation structure, improve insulation system life and reliability, simultaneously, electric insulation silica gel improves electrical insulation properties in terminal box, compensate for the defect that electrical distance is inadequate, therefore, exchange in 50Hz double-current system supply line at 3kV direct current, 25kV, under the insulation property of motor make current transformer can be operated in the operating mode of non-standing high pressure of 3900V ~ 4500V.The embedded fit structure of stator core and stator pressing ring makes the size of out frame go for narrow gage locomotive.Therefore, traction motor provided by the invention goes for narrow gauge railway, and is applicable to 3kV direct current and exchanges double-current power supply system with 25kV.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the anti-fall safe support structural representation of traction electric machine in specific embodiment of the invention scheme;
Fig. 2 is the stator winding wye connection structural representation in specific embodiment of the invention scheme;
Fig. 3 is the inner cone axle construction schematic diagram in specific embodiment of the invention scheme;
Fig. 4 is the ventilating system interface structure schematic diagram in specific embodiment of the invention scheme;
Fig. 5 is the traction electric machine oil-leak-prevention sealing structure schematic diagram in specific embodiment of the invention scheme;
Fig. 6 is the traction electric machine bearing lubrication sealed structural representation in specific embodiment of the invention scheme;
Fig. 7 is the rotor bar elbow structure schematic diagram in specific embodiment of the invention scheme;
Fig. 8 is the end cover structure schematic diagram in specific embodiment of the invention scheme;
Fig. 9 is the junction box structure schematic diagram in specific embodiment of the invention scheme;
Figure 10 is the motor holding shaft structural representation in specific embodiment of the invention scheme;
Figure 11 is the outlet method structural representation of the traction electric machine three-phase lead-out wire in specific embodiment of the invention scheme;
Figure 12 be traction electric machine stator core in specific embodiment of the invention scheme laminate fixed form structural representation;
Figure 13 is the air pressure balance cavity configuration schematic diagram in specific embodiment of the invention scheme;
In Fig. 1 to Figure 13:
Anti-fall safe support-1, stator winding-2, the interior axis of cone-3, motor air inlet-4, oil baffle-5, rubber block-6, introversion baffle plate-7, labyrinth seal structure-8, sliver-9, elbow structure-10, rotor core-11, rotor-12, end cap-13, wire hole-14, terminal box-15, T-type structure-16, hanging-17, reinforcement-18, stator pressing ring-19, three-phase lead-out wire-20, stator core-21, step-22, bearing lubrication sealing system-23, air pressure balance chamber-24.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In a kind of specific embodiment scheme, the invention provides a kind of multithread narrow gauge asynchronous traction motor, be applicable to narrow gauge railway, and be applicable to 3kV direct current and exchange double-current power supply system with 25kV.
Please refer to Fig. 1 to Figure 13, this multithread narrow gauge asynchronous traction motor comprises the parts such as stator, rotor, end cap 13, bearing, speed measuring device.The effect of stator produces rotating magnetic field and supports whole motor from machinery, and its main parts size has stator core 21, stator winding 2, stator punching etc.Rotor is used to produce induced potential and electromagnetic torque to realize the critical piece of power conversion, and it is made up of rotor core 11, rotor punching, rotor pressing ring, sliver 9, end ring and rotating shaft etc.End cap 13 is for support rotor.Bearing is the parts of the rotor connecting static stator and rotation, does not wipe mutually when rotor is rotated with stator, realize motor stator and rotor stability, rotation is mechanically connected flexibly.Speed measuring device, for measuring rotor rotating speed, sends tach signal to control system, is the important step realizing asynchronous traction motor rotational speed regulation.
It should be noted that, exchange in 50Hz double-current system supply line at 3kV direct current, 25kV, the maximum intermediate dc continuous voltage of narrow gage locomotive current transformer work is 3900V.But, when locomotive adopts direct current net to power, direct current net voltage is 1800V ~ 4500V, the maximum middle dc voltage of current transformer work there will be the non-standing high pressure of 3900V ~ 4500V, therefore the insulating Design of double-current system narrow gage locomotive asynchronous traction motor need design according to nominal insulation voltage grade 3900V, consider the voltage influence of 4500V non-continuous simultaneously, on the basis of power asynchronous traction motor of high 200 grades of corona-resistant insulation technology, strengthen motor turn-to-turn insulation, the insulation protection that overvoltage destroys unrepairable position is born in straight line insulation etc., for exposed metalwork, electric clearance designs according to 4500V electric pressure.
Under making current transformer can be operated in the operating mode of non-standing high pressure of 3900V ~ 4500V to make the insulation property of motor, this programme mainly improves from the following aspects.
This programme is as follows about the improvement of the insulation property of stator winding 2, stator winding 2 adopts 200 class F insulation structures of integration, and adopt solvent-free organic silicon impregnating varnish to coordinate VPI (i.e. vacuum pressure impregnation technique) to make, formation air-gap-free insulate, improve insulating heat-conductive, reduce electric machine temperature rise, improve mechanical strength and the globality of motor insulation structure, improve insulation system life and reliability.Wherein, have employed vacuum pressure impregnation technique in stator winding 2 dipping lacquer process, namely after stator winding 2 puts into dipping lacquer stove, close dipping lacquer stove, before dipping lacquer, dipping lacquer stove air is all extracted out and carry out dipping lacquer again.This technique can make dipping lacquer process carry out in vacuum environment, there is not bubble in stator winding 2 insulating varnish that dipping lacquer is complete, thus forms air-gap-free insulation, greatly improves the insulation property of motor.
Concrete, motor of the present invention adopts 6 grades of three phase electric machines, and winding adopts wye connection, and adopts 3 road parallel-connection structures.Stator winding 2 of the present invention is two-layered, formed winding, and shaping stator coil imbeds in stator slot, and stator winding 2 is fixing with hard end hoop, and is fixed on stator pressing ring 19 by coil bracket.Stator core 21 is overrided to form by 0.5mm cold-reduced silicon sheet, is welded into a whole, stator punching has ventilation hole with the stator pressing ring 19 of gusset by stator punching, two ends.
The present invention adopts Defend salt fog measure to motor surface structure, makes that motor is high temperature resistant, Defend salt fog.Concrete, Defend salt fog measure refers to the Defend salt fog paint scheme adopting face new to motor appearance, and driving end end cap, non-transmision end end cap, the surface treatment of non-transmision end bearing assemble bolt change Dacroment process into, and temperature and speed probe increase salt-fog resistant test.
This programme is as follows about the improvement of the insulation property of terminal box 15, and this terminal box 15 adopts the embedding terminal box being applicable to voltage levels, and concrete, this terminal box 15 adopts cast structure, and in terminal box 15, embedding has electric insulation silica gel.Due to electric insulation silica gel, comparatively air insulation performance is good, so, adopt embedding process can improve electrical insulation properties in terminal box 15, make up the defect of electrical distance deficiency, make terminal box 15 can meet electric insulation reliability, meanwhile, when motor runs, terminal box 15 is generated heat, and this casting glue long-time running also can ensure stable insulation at such a temperature.
In the arrangement of narrow gage locomotive traction electric machine out frame, due to the restriction of axial space, stator core 21 has has often occupied the portion size of two ends trim ring, makes the even whole out frame of stator pressing ring 19 be difficult to be arranged on locomotive.Narrow gage locomotive is gone in order to make this motor, what this programme adopted a kind of narrow gauge traction electric machine stator core 21 laminates fixed form, step 22 is provided with at stator core 21 two ends, stator pressing ring 19 is provided with the trim ring seam coordinated with step 22, this structure can reduce the size of out frame, thus this motor can be made to be applicable to narrow gage locomotive.Concrete, core side of leaning on motor two ends stator pressing ring 19 arranges the trim ring seam with step 22 major diameter fit of core stamping, the nominal dimension of this trim ring seam diameter is identical with step 22 external diameter of punching, and matching relationship is between the two ensured by tolerance zone.The degree of depth of this trim ring seam is determined according to the distribution of motor axial space.Now stator core 21 can be divided into intrusion stator pressing ring 19 part and exposed part outside, to invading the part of two ends stator pressing ring 19 by laminating the lamination of certain altitude in advance, invade stator pressing ring 19 part punching cylindrical on be provided with uniform comparatively shallow u-shaped groove several, the sheet number of this punching is relevant to trim ring mouth depth, and exposed punching quantity is determined according to iron core total length again.By tig weldering, this part lamination is fixed as a whole at U-type groove place, be fixedly clamped by the lamination of two ends stator pressing ring 19 by two large divisions again, finally reach while not affecting out frame overall mechanical strength and rigidity, ensure to laminate at the situation lower core that gusset area coverage is little that there is good fixing centering effect, guarantee the solid and reliable of out frame.
Tradition outlet method adopts outputs string holes 14 on motor trim ring, thus is connected in terminal box 15 by three-phase lead-out wire 20.Because the arrangement space of narrow gage locomotive is very limited, for the ease of arranging lead-out wire, this motor adopts the new structure outputing string holes 14 at the end cap 13 of motor, three-phase lead-out wire 20 is by this wire hole 14 thereto 15, this end cap 13 execution mode is simple, be easy to through engineering approaches, better can meet the designing requirement of current heavily loaded narrow gage locomotive end cap.The three-phase lead-out wire 20 of motor enters terminal box 15 again from end cap 13 outlet, avoids and reduces trim ring mechanical strength, is convenient to sealing.
It should be noted that, the arrangement space of this programme in order to make motor holding shaft be applicable to narrow gage locomotive, simultaneously also in order to improve the intensity of motor holding shaft, preferably, motor holding shaft and stator pressing ring 19 integrally casting shaping, motor holding shaft both sides are provided with reinforcement 18.Concrete, the load-carrying members such as this motor holding shaft and hanging 17 adopt monoblock cast structure, and each seize fixed cell adopts T-type structure 16 to be fixed on stator pressing ring 19, and both sides add casting reinforcement 18 and guarantee rigidity.Because hanging hole bulk limits, by the casting of hanging 17 a leg entirety on stator pressing ring 19, another leg welds and forms complete hanging structure on reinforcement 18, final motor holding shaft structure realizes integrated casting, and takes into full account the casting manufacturability of parts, processing technology and access for welding.This motor holding shaft structural stability is good, intensity is high.
It should be noted that, this programme adopts internal bevel gear transmission, and concrete, also comprise the interior axis of cone 3 being arranged at machine shaft, machine shaft is connected with gear box by the interior axis of cone 3, gearratio large (motor can reach 103/17 with gear box angular speed ratio).Pinion is pressed on machine shaft in the axis of cone 3 by internal bevel gear transmission, and both are connected by interference fit, drives pinion when the spindle is rotated, by pinion driven gear case rotation Driving Torque again.
The partial structurtes place that the present invention easily produces stress concentrated by the internal axis of cone 3 all adds escape, decreases stress raisers; Being connected with the interior axis of cone 3 by optimizing pinion, increasing pinion reduce the intrusion of pinion in the interior axis of cone 3 with the interior axis of cone 3 conical surface in conjunction with length simultaneously, while guarantee connection reliability, reduce erection stress.
It should be noted that, galvano-cautery electric current has two kinds of paths in motor.The first path is rotating shaft, and---non-transmision end bearing---stator---driving end bearing, the second is that electric current in stator is by flowing to locomotive ground connection place through rotating shaft and gear after bearings at both ends.For the first situation, motor adopts one end insulation bearing can cut off the path of corrosion current, thus prevents bearing galvano-cautery.Because non-transmision end bearing is less, make the advantage of lower cost of insulation bearing, so general non-transmision end bearing adopts insulation bearing.The structure of one end bearing insulation is only adapted to motor that the lower GTO current transformer of switching frequency powers and low-power machine, for heavy-duty motor of being powered by element current transformers such as the higher employing IGBT of switching frequency, also there is the second path and also corrosion current larger.Preferably, traction electric machine bearings at both ends of the present invention all adopts insulation bearing, damages bearing to prevent galvano-cautery.
Bearings at both ends in this programme all adopts grease lubrication, and bearings at both ends is equipped with lubricating grease supplementary device, facilitates supplemental lubrication fat.Bearing grease sealing adopts non-contacting labyrinth seal structure 8, in the labyrinth assembly structure of bearing cap, inner oil seal etc., namely leaves space and fill full lubricating grease to seal.Motor of the present invention is provided with bearing lubrication direction board near oiling oil nozzle, and direction board has marked types of fats, volume read-out and filling cycle.
It should be noted that, the lubricating system in this programme have employed novel NU330 large scale bearing height rotating speed grease lubrication system, solves large scale bearing high-speed cruising under grease lubrication condition.This motor, due to the requirement of the speed of service, requires that motor speed need reach 2820rpm; Simultaneously because inner cone axle construction is to the restriction of size and other instructions for uses of bearing, bearing designation selects NU330.NU330 bearing can reach 2820rpm in theory under grease lubrication condition, but in practical engineering application the highest achieve 2663rpm, and the key factor limiting practical engineering application maximum speed is that bearing temperature rise is easily too high.Adopt bearings at both ends all to use grease lubrication in this motor, and optimize grease-filled amount in bearing lubrication system by calculation and test thus reduce bearing temperature rise, and then motor practical engineering application maximum speed has been brought up to 2820rpm.
It should be noted that, the motor in this programme also comprises gear box and bearing cap, and the junction of gear box and bearing cap is provided with multiple drainback passage, and drainback passage is provided with introversion baffle plate 7.Multiple drainback passage make gear case oil can from after gear box flows out through different passage by gear box and the oil return of bearing cap junction to gear box, ensure that also can oil return in time when gear case oil is more.When introversion baffle plate 7 can prevent drive system from reversing, gear case oil pours in down a chimney and causes oil return not smooth.
Visible, traction electric machine driving end and gear box fitted seal structure adopt the hermetically-sealed construction of oil-leakage-prevention, and sealing structure implements oil return along separate routes, offset the adverse effect that gear box malleation is brought, make oil return more unobstructed.In addition, the junction of gear box and bearing cap is also provided with oil baffle 5 and rubber block 6, and oil baffle 5 (can increase length 19mm) can separate radial seal and axial seal oil return line, oil return respectively.Rubber block 6 can avoid traction electric machine and gear box faying face fluid sealant to smear too much, and fluid sealant is set in oil circuit and causes spill port to block.
In order to effectively reduce the temperature rise of motor, the present invention adopts forced ventilation to cool.Concrete, traction electric machine air inlet 4 place is provided with traction blower fan.Namely forced ventilation cooling is compeled to pass into cold wind to the semi-finals of traction electric machine air inlet by traction blower fan, flows out from motor air outlet, thus reduces the cooling means of electric machine temperature rise.Cooling-air enters motor from non-transmision end trim ring top air inlet, is then divided into three tunnels; The gap of one tunnel between stator core 21 and rotor core 11, to driving end; One tunnel enters stator core 21 air duct through non-transmision end end winding gap, by driving end end winding gap, imports driving end, and another road, through rotor core 11 air duct, imports driving end; Last three tunnels are discharged by the air outlet of driving end end cap after gathering.
This programme is when motor primary structure intensity allows, and optimize rotor aeration structure, increase ventilation hole aperture on rotor, rotor ventilation hole pore size is determined after carrying out simulation calculation and ventilating system composite test to ventilation system of motor.The corresponding increase of motor ventilation air channel volume, reduces ventilation windage and air inlet blast (the quiet blast of traction electric machine air intake vent is less than 1400Pa), reduces power of fan, thus reduce ventilation noise and auxiliary capacity.
In order to reduce the temperature rise of motor stator and rotor further, preferably, the stator punching of stator is provided with ventilation hole, and rotor punching and the rotor pressing ring of rotor are equipped with ventilation hole.Ventilation hole on stator punching, rotor punching and rotor pressing ring is used for increasing the draught area of stators and rotators, thus reduces the temperature rise of stators and rotators.
There is malleation (air by motor internal outwardly) because motor forced ventilation brings in electric machine rotation and produce the negative pressure (air is flowed to motor internal by external environment condition) that absorption affinity brings due to rotor high speed rotating, malleation and negative pressure all can affect bearing lubrication sealing effectiveness.Be provided with the air pressure balance chamber 24 be communicated with inside and outside motor in the present invention at end cap 13, set up motor internal and external pressure balance channel, make bearing lubrication sealing system 23 two ends without draught head, ensure lubrication and seal effect.
Rotor core 11 of the present invention is overrided to form by 0.5mm cold-reduced silicon sheet, and two ends rotor pressing ring compresses.Sliver 9 inserts after in rotor 12, being tightly fixed in rotor 12 by sliver 9, adopting Medium frequency induction solder brazing integral solder between rotor bar and end ring by rushing.This rotor is cage rotor structure, and rotor tip adopts special high resisting deflection elbow structure, and namely sliver 9 end is elbow structure 10, thus makes sliver 9 have high resisting deflection, effectively can prevent sliver 9 damage that deforms by centrifugal force in high speed rotating.Rotor tip band retaining ring, can improve end ring intensity.Rotor bar adopts oxygen-free copper sliver, and machine shaft adopts the high duty alloy Steel material of forging.。Machine shaft carries out ultrasonic detection and fracture detection by magnetic powder, answers the defects such as flawless, fracture, folding, shrinkage.
It should be noted that, the electric machine stand of this programme is provided with the anti-fall safe support 1 for being connected with the anti-fall safety rope of bogie draw bar.Concrete, the present invention adopts rolling axle-hung suspension to be arranged on bogie, and support is provided with anti-fall safe support 1, can be connected, prevent motor from coming off with the anti-fall safety rope of bogie draw bar, improves the fail safe that motor runs.
In addition, the dynamic balance grade of this motor is not less than 2.5 grades of IS01940 regulation.This motor cable adopts 3.6/6.0kV anti-flammability Halogen cross-linked polyolefin to have sheath 150mm
2cable.Cable meets fire protecting performance requirement.Cable possesses anti-flammability, flexibility, is applicable to the connection of the electricity piece of vehicle.
The speed measuring device of this motor is the double-channel Hall velocity transducer being contained in motor non-transmision end, adopts non-contact measurement.It exports the rate signal of two-way phase difference 90 °, and these two signals are used for measuring motor speed.Speed probe important technological parameters is as shown in table 1:
Table 1
| Operating voltage UB | 12VDC～16VDC |
| Export high level | ≥(UB–3)V |
| Output low level | ≤1.5V |
| Minimum frequency value | ＜0.2Hz |
| Maximum frequency values | ≥20kHz |
| Phase difference | 90°±45° |
| Duty ratio | 0.5±0.25 |
| Modulus | 2 |
| Often turn umber of pulse | 192 |
Nameplate has been installed in motor side bottom of the present invention, is easy to observe after entrucking.Nameplate denotes motor model, quota mode, rated power, rated voltage, rated current, rated frequency, rated speed, maximum speed, connection, the class of insulation, weight, the content such as sequence number, the date of production of dispatching from the factory.Nameplate and mark adopt advanced printing and/or countermark technology, clear, not easily wear away, and can correctly recognize during use.Motor of the present invention is also provided with earth stud, and is provided with ground connection mark in its vicinity.
Because the structure of the stator winding 2 in this programme and processing technology can realize air-gap-free insulation, improve insulating heat-conductive, reduce electric machine temperature rise, improve mechanical strength and the globality of motor insulation structure, improve insulation system life and reliability, simultaneously, electric insulation silica gel improves electrical insulation properties in terminal box 15, compensate for the defect that electrical distance is inadequate, therefore, exchange in 50Hz double-current system supply line at 3kV direct current, 25kV, under the insulation property of motor make current transformer can be operated in the operating mode of non-standing high pressure of 3900V ~ 4500V.The embedded fit structure of stator core 21 and stator pressing ring 19 makes the size of out frame go for narrow gage locomotive.Therefore, traction motor provided by the invention goes for narrow gauge railway, and is applicable to 3kV direct current and exchanges double-current power supply system with 25kV.
The beneficial effect of the present invention program is as follows:
(1) the present invention adopts the phase asynchronous traction electric machine of squirrel-cage, is powered by vehicle-mounted IGBT converter, adopts Direct Torque Control to control it, for locomotive provides traction power.Motor has the advantages such as volume is little, power is large, efficiency is high, permanent merit wide ranges, maintenance are little.
(2) this motor can bear vibration owing to producing during locomotive operation and impact, the impact of short-circuit torque is taken into full account in the interior axis of cone 3 designs, the magnitude of interference of the interior axis of cone and pinion chooses middle consideration short-circuit torque, make the interior axis of cone 3 under short-circuit torque, also reliably can be connected Driving Torque with the interference structure of pinion, thus can short-circuit torque be born.Bearing is the weak part of the vibration that produces when locomotive operation of motor and impact, vibration when the present invention has taken into full account locomotive operation in the design of bearing and impact, according to the vibration of locomotive operation and impact condition, accurate Calculation is carried out to all kinds bearing life, have chosen the vibration and impact that can bear locomotive operation and meeting the bearing designation in useful life makes above-mentioned critical component have resistance to vibration, and have passed motor oscillating shock test, ensureing also can reliability service under vibratory impulse at whole motor.
(3) all traction electric machines of the present invention, have interchangeability in its overall dimension, installation dimension and electric property etc.The parts that all maintenance periods need be changed, comprise rotor, end cap 13, bearing etc. and also have interchangeability.
(4) present invention employs multinomial new technology, the new constructions such as integrated seize structure, high-strength composite Welding Structure, novel 200 grades of organic silicon insulation systems, large scale bearing height rotating speed grease lubrication system, technical performance is advanced, and motor stabilizing is reliable.
(5) the present invention is First narrow gauge electric locomotive asynchronous traction motor, can be used for 1067mm gauge.
(6) the present invention is First multithread narrow gauge asynchronous traction motor, is adapted to 3kV direct current, 25kV interchange 50Hz double-current system powering mode.
(7) motor of the present invention is lightweight, torque large, and under torque plays suitable situation, weight reduces by 25% ~ 30%.
(8) the permanent merit wide ranges of this motor, permanent merit speed ratio 2.5, meets the low constant-speed operation requirement of locomotive.
(9) this Rated motor insulation voltage is high, nominal insulation voltage 3900V, and meeting the highest 4500V net pressure request, is the highest insulation voltage grade of current domestic locomotive traction motor.
(10) this invention exploits large scale bearing height rotating speed grease lubrication system, motor maximum speed reaches 2820rpm, is current NU330 bearing the highest domestic engineer applied, improves 50% than DC locomotive.
(11) the present invention adopts integrated seize structure, and lightweight, reliability is high.
(12) this electric machine stand devises anti-fall safe support 1, and devise safety ground bolt, terminal box 15 is designed with high-voltage safety and indicates, motor safety is reliable.
The present invention program provides a traction motor, for narrow gauge electric locomotive traction, for locomotive provides traction power.This motor is First multithread use for electric locomotive asynchronous traction motor, is also First narrow gauge AC transmission electric power locomotive asynchronous traction motor simultaneously.Motor provided by the invention is adapted to narrow gauge railway, is applicable to 3kV direct current and exchanges double-current power supply system with 25kV.
China developed direct current narrow gauge traction electric machine, be mainly used in DC Transmission locomotive, along with the development of variable-frequency control technique, locomotive turns to AC Drive from DC Transmission, and oneself is a kind of inexorable trend, therefore a kind of multithread alternating current asynchronous narrow gauge traction electric machine being adapted to AC drive locomotive of market continual exploitation.Narrow gauge railway extensively distributes in the world, these country's being in great demand to narrow gage locomotive, but due to its Economic and technical efficiency weakness, does not have locomotive manufacturing ability, and the source of locomotive is completely by import.Product of the present invention cuts this market in time, preemption techniques commanding elevation, has good market prospects.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a multithread narrow gauge asynchronous traction motor, be applicable to narrow gauge railway, be applicable to 3kV direct current and exchange double-current power supply system with 25kV, it is characterized in that, comprise stator, rotor, end cap (13), bearing, terminal box (15), speed measuring device, described stator comprises stator core (21) and stator winding (2), the 200 class F insulation structures that described stator winding (2) is integrated also adopt solvent-free organic silicon impregnating varnish to coordinate vacuum pressure impregnation technique to make, described end cap (13) is provided with wire hole (14), three-phase lead-out wire (20) accesses described terminal box (15) by described wire hole (14), described terminal box (15) interior embedding has electric insulation silica gel, described stator core (21) two ends are provided with step (22), stator pressing ring (19) is provided with the trim ring seam coordinated with described step (22).
2. multithread narrow gauge asynchronous traction motor according to claim 1, is characterized in that, motor holding shaft and described stator pressing ring (19) integrally casting shaping, described motor holding shaft both sides are provided with reinforcement (18).
3. multithread narrow gauge asynchronous traction motor according to claim 1, is characterized in that, also comprises the interior axis of cone (3) being arranged at machine shaft, and described machine shaft is connected with gear box by the described interior axis of cone (3).
4. multithread narrow gauge asynchronous traction motor according to claim 1, it is characterized in that, described bearing is insulation bearing and adopts grease lubrication, and bearing grease sealing adopts labyrinth seal structure (8).
5. multithread narrow gauge asynchronous traction motor according to claim 1, it is characterized in that, also comprise gear box and bearing cap, the junction of described gear box and described bearing cap is provided with multiple drainback passage, and described drainback passage is provided with introversion baffle plate (7).
6. multithread narrow gauge asynchronous traction motor according to claim 1, is characterized in that, also comprises the traction blower fan being arranged at traction electric machine air inlet (4) place.
7. multithread narrow gauge asynchronous traction motor according to claim 1, it is characterized in that, the stator punching of described stator is provided with ventilation hole, and rotor punching and the rotor pressing ring of described rotor are equipped with ventilation hole.
8. multithread narrow gauge asynchronous traction motor according to claim 1, is characterized in that, described end cap (13) is provided with the air pressure balance chamber (24) be communicated with inside and outside motor.
9. multithread narrow gauge asynchronous traction motor according to claim 1, it is characterized in that, described rotor comprises rotor core (11), sliver (9) and end ring, and described sliver (9) end is elbow structure (10).
10. multithread narrow gauge asynchronous traction motor according to claim 1, is characterized in that, electric machine stand is provided with the anti-fall safe support (1) for being connected with the anti-fall safety rope of bogie draw bar.
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| CN104467329B (en) | 2017-03-08 |
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