CN103671845B - Wind turbine gearbox test bench connecting device and wind turbine gearbox testing stand - Google Patents
Wind turbine gearbox test bench connecting device and wind turbine gearbox testing stand Download PDFInfo
- Publication number
- CN103671845B CN103671845B CN201210348236.5A CN201210348236A CN103671845B CN 103671845 B CN103671845 B CN 103671845B CN 201210348236 A CN201210348236 A CN 201210348236A CN 103671845 B CN103671845 B CN 103671845B
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- China
- Prior art keywords
- wind turbine
- turbine gearbox
- shaft
- jackshaft
- platform
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- Legal status (The legal status 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 status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
- F16D1/033—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/025—Support of gearboxes, e.g. torque arms, or attachment to other devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Wind Motors (AREA)
Abstract
The present invention relates to a kind of wind turbine gearbox test bench connecting device and wind turbine gearbox testing stand, wherein wind turbine gearbox test bench connecting device, including housing, two the first ring flanges and two the second ring flanges；Housing is provided with bearing, described bearing is equipped with jackshaft；Two the first ring flanges are respectively arranged on the two ends of described housing, and two described first ring flanges are connected with described jackshaft respectively；Two the second ring flange first ring flange Flange joint described with two respectively, two described second ring flanges are equipped with connecting shaft, described connecting shaft and described jackshaft coaxial line, and described connecting shaft is for connecting the power shaft of wind turbine gearbox.The present invention can reduce difficulty of test and the cost of wind turbine gearbox.
Description
Technical field
The present invention relates to wind power plant measuring technology, particularly relate to a kind of wind turbine gearbox test
Platform attachment means and wind turbine gearbox testing stand.
Background technology
Wind turbine gearbox in wind power generating set is an important mechanical part, its main function
It is that wind wheel produced power under wind-force effect is passed to electromotor and makes it obtain accordingly
Rotating speed.Before wind turbine gearbox dispatches from the factory, it is necessary to the combination property of wind turbine gearbox is monitored, right
The vibration of wind turbine gearbox, noise, bearing temperature, lubrication circumstances etc. are tested, omnibearing
Analyze the performance and reliability of wind turbine gearbox, for this reason, it may be necessary to use special testing stand to come wind
Electrical gearbox is tested.
Wind turbine gearbox testing stand of the prior art includes platform, platform is provided with motor with
And two typhoon electrical gearboxes, the power shaft of two typhoon electrical gearboxes is relative, i.e. two typhoon electrical gearboxes
Back-to-back setting, connects between the power shaft of two typhoon electrical gearboxes and has an attachment means, motor and its
In a wind turbine gearbox output shaft connect so that motor can drive two typhoon electrical gearboxes
Rotate, it is achieved the test to two typhoon electrical gearboxes simultaneously.
Owing to the model of wind turbine gearbox is more, the power shaft size of the wind turbine gearbox of different model
Difference, therefore, the attachment means in the middle of prior art cannot meet the test of multiple wind turbine gearbox
Work, adds difficulty of test and the cost of wind turbine gearbox.
Summary of the invention
The present invention provides a kind of wind turbine gearbox test bench connecting device and wind turbine gearbox test
Platform, its difficulty of test that can reduce wind turbine gearbox and cost.
The present invention provides a kind of wind turbine gearbox test bench connecting device, including:
Housing, is provided with bearing, is equipped with jackshaft in described bearing in described housing；
Two the first ring flanges, are respectively arranged on the two ends of described housing, two described first ring flanges
It is connected with described jackshaft respectively；
Two the second ring flanges, respectively first ring flange Flange joint described with two, described in two
Connecting shaft, described connecting shaft and described jackshaft coaxial line, described company it is equipped with on second ring flange
Spindle is for connecting the power shaft of wind turbine gearbox.
The present invention also provides for a kind of wind turbine gearbox testing stand, including:
Platform, described platform is provided with the first wind turbine gearbox and the second wind turbine gearbox, described
The power shaft of the first wind turbine gearbox and the second wind turbine gearbox is oppositely arranged；
Motor, is arranged on described platform, and the output shaft of described motor connects institute by shaft coupling
State the output shaft of the first wind turbine gearbox；
The wind turbine gearbox test bench connecting device that the present invention provides, is arranged on described platform, institute
State the connecting shaft of attachment means and connect the defeated of the first wind turbine gearbox and the second wind turbine gearbox respectively
Enter axle.
Based on above-mentioned, the wind turbine gearbox test bench connecting device that the present invention provides is by the second flange
Connecting shaft on dish connects the power shaft of wind turbine gearbox, therefore, and can be according to be tested multiple
The size of the wind turbine gearbox power shaft of model, makes respectively and is provided with the second of corresponding size connecting shaft
Ring flange, when different model wind turbine gearbox is tested by needs, only need to change and be provided with accordingly
Second ring flange of size connecting shaft, thus reduces the difficulty of test of wind turbine gearbox and becomes
This.
Accompanying drawing explanation
Fig. 1 provides the structure of a kind of wind turbine gearbox test bench connecting device to show for the embodiment of the present invention
It is intended to；
Fig. 2 provides the structure of a kind of wind turbine gearbox test bench connecting device to show for the embodiment of the present invention
Meaning sectional view；
Fig. 3 provides the structural representation of a kind of wind turbine gearbox testing stand for the embodiment of the present invention；
Fig. 4 provides the structural upright signal of a kind of wind turbine gearbox testing stand for the embodiment of the present invention
Figure.
Reference:
100: attachment means；101: housing；
102: the first ring flanges；103: the second ring flanges；
104: bearing；105: jackshaft；
106: connecting shaft；107: outer seal ring；
108: internal sealed ring；109: support；
201: platform；202: the first wind turbine gearboxes；
203: the second wind turbine gearboxes；204: toggle fixture；
205: toggle；206: fixed block；
207: rubber blanket；208: support seat.
Detailed description of the invention
Refer to Fig. 1-2, the embodiment of the present invention provides a kind of wind turbine gearbox test bench connecting device 100,
Including 101, two the first ring flanges 102 of housing and two the second ring flanges 103；Described housing 101
In be provided with bearing 104, described bearing 104 is equipped with jackshaft 105；102 points of two the first ring flanges
Be not located at the two ends of described housing 101, two described first ring flanges 102 respectively with described jackshaft 105
Connect；Two the second ring flange 103 first ring flange 102 Flange joint described with two respectively, two
Connecting shaft 106, described connecting shaft 106 and described jackshaft 105 it is equipped with on described second ring flange 103
Coaxial line, described connecting shaft 106 is for connecting the power shaft of wind turbine gearbox.
In the present embodiment, the bulk strength of attachment means 100 needs to be designed to meet wind turbine gearbox
Load under normal operating conditions and torque demand, to guarantee being smoothed out of test.Preferably employ φ 70
Connecting pin the first ring flange 102 is connected with jackshaft 105, it is preferred to use the connecting pin of φ 60 or spiral shell
First ring flange 102 and the second ring flange 103 are attached by bolt.
In the present embodiment, bearing 104 acts primarily as the effect supported with fixing jackshaft 105, middle
Axle 105 plays the effect of transmission；First ring flange 102 and the second ring flange 103 play transmission moment of torsion,
Support wind turbine gearbox, the effect of protection wind turbine gearbox main shaft bearing；When connecting shaft 106 and wind
When the power shaft of electrical gearbox connects, connecting shaft 106 can be penetrated in the power shaft of wind turbine gearbox,
And lock with locking plate, certainly may be used without shaft coupling and be attached, the present invention does not has at this
Body limits.
In the present embodiment, when carrying out wind turbine gearbox test, attachment means 100 is located at wind-powered electricity generation tooth
On roller box test-rig platform 201, two connecting shafts 106 connect the first wind turbine gearbox 202 respectively
With the power shaft of the second wind turbine gearbox 203, the output shaft of the first wind turbine gearbox 202 is with electronic
Machine is connected, and after actuating motor, motor drives the output shaft rotation of the first wind turbine gearbox 202,
The output shaft of the first wind turbine gearbox 202 drives the power shaft of the first wind turbine gearbox 202 to rotate,
The power shaft of the first wind turbine gearbox 202 drives coupled connecting shaft 106 to rotate, with first
The connecting shaft 106 that the power shaft of wind turbine gearbox 202 connects drives jackshaft 105 to rotate, middle
Axle 105 drives the connecting shaft 106 being connected with the power shaft of the second wind turbine gearbox 203 to rotate, with
The connecting shaft 106 that the power shaft of the second wind turbine gearbox 203 connects drives the second wind turbine gearbox
The power shaft of 203 rotates, it is achieved thereby that test to two typhoon electrical gearboxes simultaneously.Due to wind
Electrical gearbox test bench connecting device 100 connects wind by the connecting shaft 106 on the second ring flange 103
The power shaft of electrical gearbox, therefore, can be defeated according to the wind turbine gearbox of Multiple Type to be tested
Enter the size of axle, make the second ring flange 103 being provided with corresponding size connecting shaft 106 respectively, when needing
When different model wind turbine gearbox being tested, only need to change and be provided with corresponding size connecting shaft 106
The second ring flange 103, thus reduce difficulty of test and the cost of wind turbine gearbox.
In the present embodiment, it is preferred that bearing 104 is taper roll bearing 104, to improve bearing 104
Axially compressed behavior, the operating making attachment means 100 is more stable, when may be used without ball bearing 104
On other bearings 104, the present invention is not especially limited at this.
In the present embodiment, it is preferred that connect on the two sides of housing 101 and have outer seal ring 107, described
Outer seal ring 107 is by the gap sealing between described housing 101 and jackshaft 105.Due to outer seal ring
107 are located at bearing 104 and the outside of jackshaft 105 and by between housing 101 and jackshaft 105
Gap sealing, can reducing the dust of outside, to enter housing 101 internal, plays protection bearing 104
Effect with jackshaft 105.
In the present embodiment, it is preferred that the two ends of jackshaft 105 are arranged with internal sealed ring 108, institute respectively
State internal sealed ring 108 and be positioned at the outside of described bearing 104, for by described jackshaft 105 and bearing
Gap sealing between 104, can reduce the dust of outside enter jackshaft 105 and bearing 104 it
Between.By coordinating of internal sealed ring 108 and outer seal ring 107, further increase sealing and dust-proof effect
Really, bearing 104 and jackshaft 105 are preferably protected.
In the present embodiment, it is preferred that connect bottom housing 101 and have support 109.When carrying out wind power gear
During case test, by support 109, attachment means 100 can be fixed on wind turbine gearbox testing stand
On platform 201, the operating making attachment means 100 is more stable.
The wind turbine gearbox test bench connecting device that the embodiment of the present invention provides, it is possible to set by replacing
The second ring flange having connecting shaft realizes the connection with multiple wind turbine gearbox, easy to operate, shortens
Adjust the cycle of wind turbine gearbox testing stand, reduce the difficulty of test of wind turbine gearbox and become
This.
Refer to Fig. 1-4, the embodiment of the present invention provides a kind of wind turbine gearbox testing stand, including platform
201, the wind turbine gearbox test bench connecting device that motor and any embodiment of the present invention are provided
100；The first wind turbine gearbox 202 and the second wind turbine gearbox 203 it is provided with on described platform 201,
Described first wind turbine gearbox 202 is relative with the power shaft of the second wind turbine gearbox 203；Motor sets
Being placed on described platform 201, the output shaft of described motor connects described first wind by shaft coupling
The output shaft of electrical gearbox 202；Attachment means 100 is arranged on described platform 201, described company
The connecting shaft 106 of connection device 100 connects the first wind turbine gearbox 202 and the second wind turbine gearbox respectively
The power shaft of 203.
In the present embodiment, connecting shaft 106 can be penetrated in the power shaft of wind turbine gearbox, and with locking
Tight dish locking, it is achieved the connection of the power shaft of connecting shaft 106 and wind turbine gearbox, the most also can adopt
Being attached by other modes such as shaft couplings, the present invention the most specifically limits at this.
In the present embodiment, when carrying out wind turbine gearbox test, actuating motor, motor drives
The output shaft rotation of the first wind turbine gearbox 202, the output shaft of the first wind turbine gearbox 202 drives
The power shaft of the first wind turbine gearbox 202 rotates, and the power shaft of the first wind turbine gearbox 202 drives
Coupled connecting shaft 106 rotates, the company being connected with the power shaft of the first wind turbine gearbox 202
Spindle 106 drives jackshaft 105 to rotate, and jackshaft 105 drives and the second wind turbine gearbox 203
Power shaft connect connecting shaft 106 rotate, be connected with the power shaft of the second wind turbine gearbox 203
Connecting shaft 106 drive the power shaft of the second wind turbine gearbox 203 to rotate, it is achieved thereby that simultaneously
Test to two typhoon electrical gearboxes.Owing to attachment means 100 is by the company on the second ring flange 103
Spindle 106 connects the power shaft of wind turbine gearbox, therefore, and can be according to Multiple Type to be tested
The size of wind turbine gearbox power shaft, make the second method being provided with corresponding size connecting shaft 106 respectively
Blue dish 103, when different model wind turbine gearbox is tested by needs, only need to change and be provided with accordingly
Second ring flange 103 of size connecting shaft 106, thus shortens adjustment wind turbine gearbox test
In the cycle of platform, reduce difficulty of test and the cost of wind turbine gearbox testing stand of wind turbine gearbox.
In the present embodiment, it is preferred that platform 201 is provided with toggle fixture 204 for fixing
Described first wind turbine gearbox 202 and the toggle 205 of the second wind turbine gearbox 203；Described torsion
Arm of force fixture 204 includes two fixed blocks being arranged side by side 206, two described fixed blocks 206
Rubber blanket 207 it is respectively equipped with, by supporting bottom two described fixed blocks 206 on relative side
Seat 208 is connected with described platform 201；Described toggle 205 be clamped in described rubber blanket 207 it
Between.Thus, by the support clamping action of the toggle 205 of rubber blanket 207 pairs, formed wind
Fixing of electrical gearbox, makes wind turbine gearbox not have the situations such as upset in operation process, protects
Protect the main shaft bearing of wind turbine gearbox.It addition, can be according to the torsion of the wind turbine gearbox of different model
The size design toggle fixture 204 of the arm of force 205, from meeting wind turbine gearbox testing stand to not
The wind turbine gearbox of same model is tested.
In the present embodiment, it is preferred that be additionally provided with electromotor, described electromotor and institute on platform 201
The output shaft stating the second wind turbine gearbox 203 connects, and described electromotor is for by described second wind-powered electricity generation
The kinetic energy that the output shaft of gear-box 203 provides is converted into electric energy and to described motor.In this,
By electromotor, the kinetic energy that the output shaft of described second wind turbine gearbox 203 provides is converted into electric energy
And to described motor, effectively save the power consumption in test process.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, and
Non-to its restriction；Although the present invention being described in detail with reference to foregoing embodiments, ability
The those of ordinary skill in territory is it is understood that it still can be to the technology described in foregoing embodiments
Scheme is modified, or the most some or all of technical characteristic is carried out equivalent；And this
A little amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (5)
1. a wind turbine gearbox test bench connecting device, it is characterised in that including:
Housing, is provided with bearing, is equipped with jackshaft in described bearing in described housing；
Two the first ring flanges, are respectively arranged on the two ends of described housing, two described first ring flanges
It is connected with described jackshaft respectively；
Two the second ring flanges, respectively first ring flange Flange joint described with two, described in two
Connecting shaft, described connecting shaft and described jackshaft coaxial line, described company it is equipped with on second ring flange
Spindle is for connecting the power shaft of wind turbine gearbox；
Connecting on the two sides of described housing and have outer seal ring, described outer seal ring is by described housing and centre
Gap sealing between axle；
The two ends of described jackshaft are arranged with internal sealed ring respectively, and described internal sealed ring is positioned at described bearing
Outside, for by the gap sealing between described jackshaft and bearing；
Described bearing is taper roll bearing.
Wind turbine gearbox test bench connecting device the most according to claim 1, its feature exists
In, described housing bottom connects support.
3. a wind turbine gearbox testing stand, it is characterised in that including:
Platform, described platform is provided with the first wind turbine gearbox and the second wind turbine gearbox, described
The power shaft of the first wind turbine gearbox and the second wind turbine gearbox is oppositely arranged；
Motor, is arranged on described platform, and the output shaft of described motor is connected by shaft coupling
The output shaft of described first wind turbine gearbox；
In claim 1-2, arbitrary described wind turbine gearbox test bench connecting device, is arranged at institute
Stating on platform, the connecting shaft of described attachment means connects the first wind turbine gearbox and the second wind-powered electricity generation respectively
The power shaft of gear-box.
Wind turbine gearbox testing stand the most according to claim 3, it is characterised in that:
Described platform is provided with toggle fixture for fixing described first wind turbine gearbox and
The toggle of two wind turbine gearboxes；
Described toggle fixture includes two fixed blocks being arranged side by side, two described fixed block phases
To side on be respectively equipped with rubber blanket, flat with described by supporting seat bottom two described fixed blocks
Platform connects；
Described toggle is clamped between described rubber blanket.
5. according to the wind turbine gearbox testing stand described in claim 3 or 4, it is characterised in that
The output shaft of electromotor, described electromotor and described second wind turbine gearbox it is additionally provided with on described platform
Connecting, described electromotor converts for the kinetic energy provided by the output shaft of described second wind turbine gearbox
For electric energy and to described motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210348236.5A CN103671845B (en) | 2012-09-18 | 2012-09-18 | Wind turbine gearbox test bench connecting device and wind turbine gearbox testing stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210348236.5A CN103671845B (en) | 2012-09-18 | 2012-09-18 | Wind turbine gearbox test bench connecting device and wind turbine gearbox testing stand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103671845A CN103671845A (en) | 2014-03-26 |
| CN103671845B true CN103671845B (en) | 2016-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210348236.5A Active CN103671845B (en) | 2012-09-18 | 2012-09-18 | Wind turbine gearbox test bench connecting device and wind turbine gearbox testing stand |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10138980B2 (en) * | 2014-08-26 | 2018-11-27 | Amber Kinetics, Inc. | Stacked flywheel rotor |
| CN106644465B (en) * | 2016-11-24 | 2019-05-31 | 沈阳鼓风机集团风电有限公司 | The experimental rig of wind turbine gearbox |
| CN113107983B (en) * | 2021-03-04 | 2023-03-28 | 福建省宏拓机械制造有限公司 | Linkage adjustment type driving connection structure |
| CN114838933B (en) * | 2022-04-20 | 2023-06-02 | 上海交通大学 | Gear box test device with coaxial output |
| CN114889521B (en) * | 2022-05-12 | 2023-04-28 | 南京讯联液压技术股份有限公司 | Wind power generation gear box fixing device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10119427A1 (en) * | 2001-04-20 | 2002-10-24 | Enron Wind Gmbh | Coupling device for a wind turbine |
| US8584530B2 (en) * | 2009-08-19 | 2013-11-19 | Avl Test Systems, Inc. | Wind turbine gearbox testing system |
| CN201803849U (en) * | 2010-09-14 | 2011-04-20 | 重庆齿轮箱有限责任公司 | Elastic connecting device for test of wind power gearboxes |
| CN102619888B (en) * | 2011-01-31 | 2015-05-27 | 华锐风电科技(集团)股份有限公司 | Motive power transmission connecting flange and wind power generator set |
| CN201988910U (en) * | 2011-02-22 | 2011-09-28 | 北车风电有限公司 | Axial adjustment device for universal shift coupling of wind turbine generator set testing stand |
| CN102213643B (en) * | 2011-03-03 | 2012-11-21 | 宁波东力传动设备股份有限公司 | Wind power wheel gear box type testing commissioning connection device |
| CN102156047B (en) * | 2011-04-02 | 2012-09-05 | 浙江大学 | Loading simulation device for test bed of wind turbine |
| CN202927005U (en) * | 2012-09-18 | 2013-05-08 | 北京南口轨道交通机械有限责任公司 | Connecting device of wind power gear box test stand and wind power gear box test stand |
-
2012
- 2012-09-18 CN CN201210348236.5A patent/CN103671845B/en active Active
Also Published As
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|---|---|
| CN103671845A (en) | 2014-03-26 |
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Address after: 102202 Beijing city Changping District South Town Road North South Town West No. 584 No. 585 Applicant after: Beijing Zhongche Nankow Machinery Co. Ltd. Address before: 102202 Beijing city Changping District town of South Road North Applicant before: Beijing NanKou Railway Transit Machinery Co., Ltd. |
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