CN106515750A - Permanent magnet direct drive subway train - Google Patents

Permanent magnet direct drive subway train Download PDF

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Publication number
CN106515750A
CN106515750A CN201610878046.2A CN201610878046A CN106515750A CN 106515750 A CN106515750 A CN 106515750A CN 201610878046 A CN201610878046 A CN 201610878046A CN 106515750 A CN106515750 A CN 106515750A
Authority
CN
China
Prior art keywords
traction
permanent
permanent magnet
motor
subway train
Prior art date
Application number
CN201610878046.2A
Other languages
Chinese (zh)
Inventor
胡定祥
赵旭东
冯遵委
楚永萍
梁小强
祝航
张杨
何斌斌
Original Assignee
中车南京浦镇车辆有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中车南京浦镇车辆有限公司 filed Critical 中车南京浦镇车辆有限公司
Priority to CN201610878046.2A priority Critical patent/CN106515750A/en
Publication of CN106515750A publication Critical patent/CN106515750A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61CLOCOMOTIVES; MOTOR RAILCARS
    • B61C3/00Electric locomotives or railcars
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61CLOCOMOTIVES; MOTOR RAILCARS
    • B61C9/00Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
    • B61C9/38Transmission systems in or for locomotives or motor railcars with electric motor propulsion
    • B61C9/48Transmission systems in or for locomotives or motor railcars with electric motor propulsion with motors supported on vehicle frames and driving axles, e.g. axle or nose suspension
    • B61C9/50Transmission systems in or for locomotives or motor railcars with electric motor propulsion with motors supported on vehicle frames and driving axles, e.g. axle or nose suspension in bogies

Abstract

The present invention relates to a permanent magnet direct drive subway train, comprising a body, and a frame device and a wheel set device arranged below the body. Permanent magnet synchronous traction motors are installed on wheel axles in an axle hung way, the two ends of rotors of the permanent magnet synchronous traction motors are interlinked with an axle, the inner sides of the permanent magnet synchronous traction motors are connected with the frame device through an elastic support device, a traction system matched with the direct drive synchronous magnet synchronous motors adopts an axle control mode, and an isolation contactor is arranged between each motor and a traction inverter. The traction system matched with the direct drive synchronous magnet synchronous motors adopts the axle control mode, the traction system has no limit to the wheel diameter difference among axles in operation, so that the workload and maintenance costs of spinning rollers of a vehicle are greatly decreased, and the isolation contactor is arranged between each motor and the traction inverter, so that the condition that the operation of the inverter is affected by the fact that the motors fail and turn into generators is avoided, and the safety of the traction system in the fault state of the motors is guaranteed.

Description

Permanent magnet direct-drive subway train

Technical field

The present invention relates to permanent magnet direct-drive subway train, belongs to field of urban rail.

Background technology

In subway train design, typically using ACasynchronous motor drive, due to needing rotor electrical excitation, electric efficiency Not high enough, energy consumption is big, and motor elasticity is installed or is rigidly attached on framework, in order to adapt to the dynamic disturbances between motor and wheel pair and Transmission torque needs to arrange the mechanisms such as complicated shaft coupling and gear-box, and this bogie structure is complicated, gear-box shaft coupling Transmission efficiency is relatively low and occupies bogie longitudinal space so that the wheel of bogie is larger to wheelbase, weight big, the little curve of vehicle It is difficult to be obviously improved by performance indications such as performance, energy savings.On the other hand, alternating current asynchronous trailer system is typically taken to motor The power of one car or a bogie can only be cut off by car control or frame control pattern so that during electrical fault, the power peace of train Full redundancy is less, simultaneously as adopting car control or frame control, is controlled system restriction, vehicle between each bar axle when vehicle is transported Diameter difference must be controlled in the range of very little, increased vehicle Xuan wheel workloads and maintenance cost.

The content of the invention

The technical problem to be solved be overcome existing employing Induction Motor-Driven bogie technique wheelbase it is big, The above-mentioned deficiency that weight is big, efficiency is low, and restriction of the trailer system to each axle wheel diameter difference, there is provided a kind of permanent magnet direct-drive ground Ferrum train.

In order to solve above technical problem, the permanent magnet direct-drive subway train that the present invention is provided including car body, is arranged at car body The frame apparatus and wheel of lower section are to device, it is characterised in that:Seize on wheel shaft and permanent-magnet synchronizing traction motor is installed, the permanent magnetism Sync pulling rotor two ends are coupled with axletree, and the inner side of permanent-magnet synchronizing traction motor stator passes through resilient supporting unit and structure Rack device connects, and the trailer system supporting with direct drive permanent magnetic synchronous motor adopts axle prosecutor formula, inverse with traction in every motor Become isolation catalyst is provided between device.

Subway train substitutes original asynchronous machine bogie using installing type permanent magnet direct-drive bogie is seized, and is led using permanent magnetism Draw system to substitute and traditional trailer system, while water cooling plant can need to be equipped with for permanent magnet direct driving motor so that train has efficiency High, lightweight, energy-conserving and environment-protective, low noise, the advantage of low abrasion.Seize installing type permanent magnet direct-drive bogie to lead using permanent-magnet synchronous Drawing motor replaces asynchronous machine, permanent-magnetic synchronous motor rotor to adopt magnet structure, it is not necessary to power consumption, has relative to asynchronous machine Effective percentage is high, and small volume is lightweight, the advantage of energy-conserving and environment-protective.Axle installing type permanent magnet direct-drive bogie is drawn using permanent-magnet synchronous Motor holding shaft installs direct drive, saves the longitudinal space of gear-box and shaft coupling, further improves efficiency, and while can reduce Wheel-base bogie, lifts the little curving performance of bogie, reduces wheel-rail wear.

Supporting trailer system synchronous with direct drive permanent magnetic replaces the car control of asynchronous machine trailer system using axle prosecutor formula Or frame prosecutor formula so that train can individually cut off a certain motor rather than cut off a car or one turn in electrical fault To frame, the Safety Redundancy of train dynamicses is increased, as using axle prosecutor formula, control system is to the car between each bar axle during operation Wheel diameter difference is unrestricted so that the workload and maintenance cost of vehicle Xuan wheel Xuan wheels is substantially reduced, in every motor and traction Isolation catalyst is provided between inverter, to prevent from being changed into electromotor impact inverter work after electrical fault, it is ensured that traction Safety of the system in electrical fault state.

In order to solve above technical problem, the present invention also has following feature:

1st, the resilient supporting unit has three elastic panel nodes, and three elastic panel nodes of the resilient supporting unit are positioned at same In perpendicular, first, second elastic panel nodes are installed on the upper and lower on the inside of permanent-magnet synchronizing traction motor stator, the 3rd Elastic panel nodes are installed on the crossbeam of frame apparatus.By resilient supporting unit, increase the arm of force of balance motor traction braking torque, Reduce the stress of framework, while the device is less to single stage suspension device additional lateral and longitudinal register rigidity, it is ensured that bogie Little curving performance.

2nd, the interference of permanent-magnet synchronizing traction motor two ends of rotor is fitted on axletree.

3rd, groove is provided with the middle part of axletree, for discharging the flexural deformation of axletree.

4th, permanent-magnet synchronizing traction motor stator is supported on axletree by being arranged at the cylinder roller bearing at two ends, by this Two cylinder roller bearings bear vertical vibration, and permanent-magnet synchronizing traction motor stator is by being arranged at four penalty kick axles of end side Holding carries out located lateral, bears oscillation crosswise by this 4 points of ball bearings.

5th, with double drawing pull bar devices, the centrepin of double drawing pull bar devices is installed on car body, centrepin bottom peace Equipped with rubber sleeve, traction body is installed outside rubber sleeve, two drawing pull bars, the other end peace of drawing pull bar are installed on traction body The compound seat of traction backstop being mounted on frame apparatus 1.

6th, it is LF device with two, two is that the air spring of LF device is fallen within framework, Vertical damper, lateral damper are installed between car body and frame apparatus, and horizontal shelves mounting seat is installed on car body, horizontal shelves Elastic buffer rubber backstop and anti-overcharge steel wire rope are housed in mounting seat.This pair of drawing pull bar device is by drawing pull bar two ends The traversing and catenary motion that carrys out adapted framework relative to car body is reversed and deflected to elastic panel nodes so that two is additional vertical and horizontal It is less to rigidity, improve the comfortableness taken.

7th, it is vertical damper to connect the two of side frame and car body respectively with two ends, connects the two of framework and centre of pull pin It is lateral damper.

Permanent magnet direct-drive subway train adopts permanent-magnet synchronizing traction motor using motor holding shaft installing type permanent magnet direct-drive bogie, Rotor-exciting electric energy is eliminated, electric efficiency is improve, transmission efficiency is further improved after saving gear box device, and is reduced The wheelbase of bogie, the strong advantage of its energy-saving and environmental protection and little curve negotiating energy ability, and permanent magnetism trailer system adopt axle prosecutor formula The restriction of each axle wheel footpath difference of vehicle is relieved, Xuan wheel workloads is reduced, is reduced maintenance cost, permanent magnet direct-drive subway train is wide It is general to be applied to urban rail transit vehicles.

Description of the drawings

Main structure diagrams of the Fig. 1 for motor holding shaft installing type permanent magnet direct-drive bogie.

Overlooking the structure diagrams of the Fig. 2 for motor holding shaft installing type permanent magnet direct-drive bogie.

Left view structural representations of the Fig. 3 for motor holding shaft installing type permanent magnet direct-drive bogie.

Present invention looks up structural representation of the Fig. 4 for motor holding shaft installing type permanent magnet direct-drive bogie.

Dimensional structure diagrams of the Fig. 5 for motor holding shaft installing type permanent magnet direct-drive bogie.

Fig. 6 is permagnetic synchronous motor generalized section.

Fig. 7 is triangular shaped elastomeric support device structure schematic diagram.

Fig. 8 is bogie partial structural diagram.

Fig. 9 is secondary suspension device structural representation.

In figure, label is schematically as follows:Frame apparatus 1, one is rubber metal pad suspension arrangement 2, takes turns set axle box device 3, permanent-magnet synchronous Traction electric machine 4, triangular shaped elastomeric support meanss 5, two is LF device 6, tread foundation brake gear 7, double tractions Pull rod device 8, rotor 9, stator 10, bearing inner shield ring 11, the first electric motor end cap 12, cylinder roller bearing 13, bearing outer ring pressure Lid 14, bearing outer ring gland 15, the second electric motor end cap 16, the first spacer ring 17, the second spacer ring 18,4 points of ball bearings 19, axletree 20, Wheel 21, mounting seat 22, elastic panel nodes 1, elastic panel nodes 2 24, centrepin 25, traction body 26, drawing pull bar 27, rubber sleeve 28, the compound seat 29 of traction backstop, air spring 30, vertical damper 31, lateral damper 32, anti-overcharge steel wire rope 33, laterally Shelves mounting seat 34, elastic buffer rubber backstop 35.

Specific embodiment

The present embodiment permanent magnet direct-drive subway train, including car body, the frame apparatus being arranged at below car body and wheel to device, Seize on wheel shaft and permanent-magnet synchronizing traction motor is installed, the trailer system supporting with direct drive permanent magnetic synchronous motor adopts axle prosecutor Formula, is provided between every motor and traction invertor and isolates catalyst.

As shown in Figures 1 to 9, be train of the present invention motor holding shaft installing type permanent magnet direct-drive bogie, composition includes:Structure Rack device 1, be located on front side of bogie frame respectively and rear side permanent-magnet synchronizing traction motor 4, positioned at permanent-magnet synchronizing traction motor 4 with Triangular shaped elastomeric support meanss 5, the front and back wheel set axle box device 3 being arranged at below bogie frame between framework, fifth wheel The one of set axle box device 3 and frame apparatus 1 is rubber metal pad suspension arrangement 2, and it is air bullet to be arranged above bogie frame two Spring suspension arrangement 6, it is installed on the Tread brake device 7 of framework, connection body and steering on the inside of two wheel set axle box devices Double drawing pull bar devices 8 of frame are constituted.

The 9 two ends interference of rotor of permanent-magnet synchronizing traction motor 4 is arranged on the axletree 20 of wheel set axle box device, permanent-magnet synchronous First electric motor end cap 12 is installed on the left of the stator 10 of traction electric machine 4, the first electric motor end cap 12 is sat by cylinder roller bearing 13 Fall on axletree 20, the outer ring of cylinder roller bearing 13 is laterally fixed with bearing outer ring gland 15, cylinder roller bearing 13 Inner ring on the inside of by 11 transverse gear of bearing inner shield ring on axletree, on the outside of the inner ring of cylinder roller bearing 13 by interference in car The outer back-up ring 14 of bearing on axle 20 carries out located lateral;Second motor is installed on the right side of the stator 10 of permanent-magnet synchronizing traction motor 4 End cap 16, is seated on axletree 20 by cylinder roller bearing 13 in the second electric motor end cap 16, and right in cylinder roller bearing 13 4 points of ball bearings 19, cylinder roller bearing 13 and 4 points of ball bearings 19 are also equipped between the second electric motor end cap of side 16 and axletree 20 Separated with the first spacer ring 17 between outer ring, between cylinder roller bearing 13 and the inner ring of 4 points of ball bearings 19 with the second spacer ring 18 every Open, the outer ring of cylinder roller bearing 13 is laterally fixed with bearing outer ring gland 14, on the inside of the inner ring of cylinder roller bearing 13 It is by 11 transverse gear of bearing inner shield ring on axletree, on axletree 20 and outer by interference on the outside of the inner ring of cylinder roller bearing 13 The outer back-up ring 14 of bearing of the lateral spacing position on wheel 21 carries out located lateral, the vertical cylinder roller bearing by the left and right sides of motor 13 bear, and are laterally only born by 4 points of ball bearings 19, are existed little between 4 points of ball bearings 19 and the second electric motor end cap of right side 16 Gap, is not subject to vertical load.

The stator 10 of permanent-magnet synchronizing traction motor 4 is provided with triangular shaped elastomeric support meanss mounting seat 22, and mounting seat 22 is led to The elastic panel nodes 1 crossed in triangular shaped elastomeric support meanss 5 connect, between frame apparatus 1 and triangular shaped elastomeric support meanss 5 Connected by elastic panel nodes 2 24, gap is provided with before and after the longitudinal direction of elastic panel nodes 2 24 so that the longitudinal rigidity of the elastic panel nodes It is less.

The centrepin 25 of double drawing pull bar devices 8 is installed on car body, and rubber sleeve 28, rubber are installed in 25 bottom of centrepin Set is outside to be provided with traction body 26, installs two drawing pull bars 27 on traction body 26, and the other end of drawing pull bar 27 is arranged on structure On the compound seat 29 of traction backstop on rack device 1.

Two is that the air spring 31 of LF device 6 is fallen within framework, vertical damper 31, lateral damper 32 It is installed between car body and frame apparatus, horizontal shelves mounting seat 34 is installed on car body, equipped with elasticity in horizontal shelves mounting seat 34 Yielding rubber backstop 35, anti-overcharge steel wire rope 33.

In addition to the implementation, the present invention can also have other embodiment, and such as triangular supporting device replaces, single Root pull bar is supported, and two pull bars are supported, and motor left and right sides side is arranged cylinder roller bearing, side arrangement band rib and for example Roller bearing, or both sides are arranged to circular cone roller bearing and hold.The technical scheme that all employing equivalents or equivalent transformation are formed, All fall within the protection domain of application claims.

Claims (8)

1. a kind of permanent magnet direct-drive subway train, including car body, the frame apparatus being arranged at below car body and wheel to device, its feature It is:Seize on wheel shaft and permanent-magnet synchronizing traction motor be installed, the permanent-magnet synchronizing traction motor two ends of rotor is coupled with axletree, The inner side of permanent-magnet synchronizing traction motor stator is connected with frame apparatus by resilient supporting unit, with direct drive permanent magnetic synchronous motor Supporting trailer system adopts axle prosecutor formula, is provided with and isolates catalyst between every motor and traction invertor.
2. permanent magnet direct-drive subway train according to claim 1, it is characterised in that:The resilient supporting unit has three Elastic panel nodes, three elastic panel nodes of the resilient supporting unit are located in same perpendicular, first, second elastic panel nodes peace Loaded on the upper and lower on the inside of permanent-magnet synchronizing traction motor stator, the 3rd elastic panel nodes are installed on the crossbeam of frame apparatus, By resilient supporting unit, increase the arm of force of balance motor traction braking torque, reduce the stress of framework, while the device is to one It is that suspension arrangement additional lateral and longitudinal register rigidity are less, it is ensured that the little curving performance of bogie.
3. permanent magnet direct-drive subway train according to claim 1, it is characterised in that:Permanent-magnet synchronizing traction motor two ends of rotor Interference is fitted on axletree.
4. permanent magnet direct-drive subway train according to claim 1, it is characterised in that:Groove is provided with the middle part of axletree, for releasing Put the flexural deformation of axletree.
5. permanent magnet direct-drive subway train according to claim 1, it is characterised in that:Permanent-magnet synchronizing traction motor stator passes through The cylinder roller bearing for being arranged at two ends is supported on axletree, bears vertical vibration, permanent magnetism by the two cylinder roller bearings Sync pulling motor stator carries out located lateral by being arranged at 4 points of ball bearings of end side, by this 4 points of ball bearings Bear oscillation crosswise.
6. permanent magnet direct-drive subway train according to claim 1, it is characterised in that:It is with double drawing pull bar devices, double to lead The centrepin of lever apparatus of being pulled is installed on car body, and rubber sleeve is installed in centrepin bottom, is provided with traction body outside rubber sleeve, Two drawing pull bars are installed on traction body, the other end of drawing pull bar is arranged on the compound seat of the traction backstop on frame apparatus 1.
7. permanent magnet direct-drive subway train according to claim 6, it is characterised in that:It is LF dress with two Put, two is that the air spring of LF device is fallen within framework, vertical damper, lateral damper be installed on car body with Between frame apparatus, horizontal shelves mounting seat is installed on car body, elastic buffer rubber backstop is housed in horizontal shelves mounting seat and is prevented Steel wire rope is overcharged, this pair of drawing pull bar device is reversed by the elastic panel nodes at drawing pull bar two ends and deflected relative come adapted framework In the traversing and catenary motion of car body so that two is that additional vertical and lateral stiffness is less, the comfortableness taken is improved.
8. permanent magnet direct-drive subway train according to claim 7, it is characterised in that:Connect side frame and car respectively with two ends The two of body are vertical damper, and connect framework and centre of pull pin two are lateral damper.
CN201610878046.2A 2016-09-30 2016-09-30 Permanent magnet direct drive subway train CN106515750A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610878046.2A CN106515750A (en) 2016-09-30 2016-09-30 Permanent magnet direct drive subway train

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610878046.2A CN106515750A (en) 2016-09-30 2016-09-30 Permanent magnet direct drive subway train
PCT/CN2017/086768 WO2018058996A1 (en) 2016-09-30 2017-06-01 Permanent magnet direct drive subway train

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CN106515750A true CN106515750A (en) 2017-03-22

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CN (1) CN106515750A (en)
WO (1) WO2018058996A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018058996A1 (en) * 2016-09-30 2018-04-05 中车南京浦镇车辆有限公司 Permanent magnet direct drive subway train
CN108791325A (en) * 2018-07-27 2018-11-13 中车株洲电力机车有限公司 A kind of permanent magnet direct-drive bogie and its rail vehicle
CN109178017A (en) * 2018-08-17 2019-01-11 中车南京浦镇车辆有限公司 A kind of small wheelbase compact magneto seizes installing type and directly drives bogie

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204452449U (en) * 2014-09-15 2015-07-08 株洲南车特种装备科技有限公司 A kind of track train bogie truck
CN105197021A (en) * 2015-09-22 2015-12-30 南车南京浦镇车辆有限公司 Motor hold shaft installation type permanent-magnetic direct-drive bogie

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5172122B2 (en) * 2006-09-21 2013-03-27 株式会社東芝 Permanent magnet synchronous motor drive system for railway vehicles
CN202765007U (en) * 2012-07-10 2013-03-06 南车南京浦镇车辆有限公司 Flexible direct drive bogie
CN103516281B (en) * 2013-10-25 2015-02-11 南车株洲电力机车研究所有限公司 Method, device and system for controlling PMSM (Permanent Magnet Synchronous Motor) to put into operation again at belt speed
CN104859668B (en) * 2015-02-13 2017-06-16 株洲南车时代电气股份有限公司 Energy storage type trailer system
CN105262303A (en) * 2015-11-25 2016-01-20 南京埃斯顿自动控制技术有限公司 Permanent magnetic synchronous direct drive motor for rail transit
CN106515750A (en) * 2016-09-30 2017-03-22 中车南京浦镇车辆有限公司 Permanent magnet direct drive subway train

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204452449U (en) * 2014-09-15 2015-07-08 株洲南车特种装备科技有限公司 A kind of track train bogie truck
CN105197021A (en) * 2015-09-22 2015-12-30 南车南京浦镇车辆有限公司 Motor hold shaft installation type permanent-magnetic direct-drive bogie

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
刘可安: "城市轨道交通永磁同步牵引系统", 《铁路技术创新》 *
楚永萍等: "地铁车辆新型永磁直驱转向架的设计和分析", 《城市轨道交通研究》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018058996A1 (en) * 2016-09-30 2018-04-05 中车南京浦镇车辆有限公司 Permanent magnet direct drive subway train
CN108791325A (en) * 2018-07-27 2018-11-13 中车株洲电力机车有限公司 A kind of permanent magnet direct-drive bogie and its rail vehicle
CN108791325B (en) * 2018-07-27 2020-08-21 中车株洲电力机车有限公司 Permanent-magnet direct-drive bogie and railway vehicle thereof
CN109178017A (en) * 2018-08-17 2019-01-11 中车南京浦镇车辆有限公司 A kind of small wheelbase compact magneto seizes installing type and directly drives bogie

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