CN110185779A - The planet carrier lubrication system of wind turbine gearbox - Google Patents
The planet carrier lubrication system of wind turbine gearbox Download PDFInfo
- Publication number
- CN110185779A CN110185779A CN201910558292.3A CN201910558292A CN110185779A CN 110185779 A CN110185779 A CN 110185779A CN 201910558292 A CN201910558292 A CN 201910558292A CN 110185779 A CN110185779 A CN 110185779A
- Authority
- CN
- China
- Prior art keywords
- oil
- planet carrier
- storage tank
- feed hole
- fuel feed
- Prior art date
- 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.)
- Pending
Links
- 238000005461 lubrication Methods 0.000 title claims abstract description 41
- 239000000446 fuel Substances 0.000 claims abstract description 73
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 120
- 239000010687 lubricating oil Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
-
- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
-
- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
-
- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0479—Gears or bearings on planet carriers
-
- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
-
- 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
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
Abstract
The invention discloses a kind of planet carrier lubrication systems of wind turbine gearbox, comprising: cabinet, planet carrier, planet carrier bearing, pin shaft, planetary gear and planet wheel bearing；Planet carrier is installed by planet carrier bearing to cabinet；Pin shaft is installed to planet carrier；Planetary gear is installed by planet wheel bearing to pin shaft；Pin shaft is formed with oil storage tank and the oil duct for by the oil guiding planet wheel bearing in oil storage tank being planet wheel bearing lubrication；Oil duct is connected to oil storage tank；Planet carrier is equipped with the fuel feed hole that fuel feeding enters oil storage tank；Oil storage tank is aligned with fuel feed hole and the orifice area of oil storage tank is less than the orifice area of fuel feed hole；The planet carrier lubrication system of wind turbine gearbox further include: oil can be sprayed into when being aligned with fuel feed hole to the oil injection structure of fuel feed hole.The invention has the beneficial effects that simple compared to traditional lubricating system structure, processing cost is low.
Description
Technical field
The present invention relates to a kind of planet carrier lubrication systems, and in particular to a kind of planet carrier lubrication system of wind turbine gearbox.
Background technique
Wind power generation gear case, also referred to as wind turbine gearbox or wind power speed-increasing gearbox are components very crucial in complete machine,
Play a part of transmitting power in complete machine, quality good or not directly affects the security performance and economic performance of blower.Due to wind-powered electricity generation
Particularity, gear-box once breaks down, is difficult to disassemble in high-altitude, therefore, generally can not be in height as long as breaking down
Sky maintenance, can only integral replacing, cause the use cost of wind-driven generator high.
And planetary stage lubrication there are it is bad when, gearbox fault may be caused, influence the service life of gear-box.Traditional
Lubrication system is to guarantee proper lubrication, and structure is complicated, and processing cost is high.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides a kind of planet carrier lubrication system of wind turbine gearbox,
When fuel feed hole on planet carrier runs to bottom, oil is poured into oil storage tank for planet wheel bearing lubrication.Gear can be made full use of
The lubricating oil in bottom portion extends lubrication time, improves lubricant effect.Fuel feed hole is set to be aligned oil spout when planet carrier continues to run simultaneously
When structure, wind turbine gearbox is able to enter oil storage tank by the pressure oil that oil injection structure sprays and carries out repairing to oil storage tank, continues
For planet wheel bearing lubrication, structure is simple, and processing cost is low.
In order to achieve the above objectives, the present invention uses following scheme:
A kind of planet carrier lubrication system of wind turbine gearbox, comprising: cabinet, planet carrier, planet carrier bearing, pin shaft, planetary gear and
Planet wheel bearing；Planet carrier is installed by planet carrier bearing to cabinet；Pin shaft is installed to planet carrier；Planetary gear passes through planet wheel spindle
Installation is held to pin shaft；Pin shaft is formed with oil storage tank and for being planet wheel bearing profit by the oil guiding planet wheel bearing in oil storage tank
Sliding oil duct；Oil duct is connected to oil storage tank；Planet carrier is equipped with the fuel feed hole that fuel feeding enters oil storage tank；Oil storage tank is aligned with fuel feed hole
And the orifice area of oil storage tank is less than the orifice area of fuel feed hole；The planet carrier lubrication system of wind turbine gearbox further include: with
Fuel feed hole can spray into oil when being aligned to the oil injection structure of fuel feed hole.
Further, oil storage tank is set to one end of pin shaft.
Further, oil storage tank and fuel feed hole extend along the axis of pin shaft.
Further, oil duct is radially extended along the axis of pin shaft.
Further, the diameter of fuel feed hole is less than the diameter of oil storage tank.
Further, cabinet includes: the first cabinet, gear ring and the second cabinet；Gear ring connects the first cabinet and the second cabinet
And between the first cabinet and the second cabinet.
A kind of planet carrier lubrication system of wind turbine gearbox, comprising: cabinet, planet carrier, planet carrier bearing, pin shaft, planet
Wheel and planet wheel bearing；Planet carrier is installed by planet carrier bearing to cabinet；Pin shaft is installed to planet carrier；Planetary gear passes through planet
Wheel bearing is installed to pin shaft；The planet carrier lubrication system of wind turbine gearbox further include: the oil injection structure for oil spout；Pin shaft is formed
There are oil storage tank and the oil duct for by the oil guiding planet wheel bearing in oil storage tank being planet wheel bearing lubrication；Oil duct is connected to storage
Oil groove；Planet carrier is equipped with the fuel feed hole that fuel feeding enters oil storage tank；When planet carrier turns to fuel feed hole and submerges oil sump, in oil sump
Oil can enter oil storage tank via fuel feed hole；When planet carrier turns to fuel feed hole alignment oil injection structure, the oily energy of oil injection structure ejection
Enter oil storage tank via fuel feed hole.
A kind of planet carrier lubrication system of wind turbine gearbox, comprising: cabinet, planet carrier, planet carrier bearing, pin shaft, planet
Wheel and planet wheel bearing；Planet carrier is installed by planet carrier bearing to cabinet；Pin shaft is installed to planet carrier；Planetary gear passes through planet
Wheel bearing is installed to pin shaft；The planet carrier lubrication system of wind turbine gearbox further include: the oil injection structure for oil spout；Planet is set up
There is fuel feed hole；Pin shaft is formed with for being planet wheel bearing fuel feeding with the oil duct that is lubricated and when fuel feed hole is submerged to oil sump
The oil entered in fuel feed hole can be received when the oil sprayed with oil injection structure enters fuel feed hole and oil is provided to the storage of oil duct
Oil groove；Oil storage tank is connected to fuel feed hole；Oil duct is connected to oil storage tank.
Further, oil storage tank is aligned with fuel feed hole and the orifice area of oil storage tank is less than the orifice area of fuel feed hole.
Further, fuel feed hole extends along the axis of pin shaft.
Further, oil storage tank extends along the axis of pin shaft；Oil storage tank is set to one end of pin shaft.
The invention has the beneficial effects that when the fuel feed hole on planet carrier runs to bottom, by oil pour into oil storage tank with
It is lubricated for planet wheel bearing.The lubricating oil of gear-box bottom can be made full use of to extend lubrication time, improve lubricant effect.Work as simultaneously
Planet carrier continues to run when fuel feed hole being made to be aligned oil injection structure, and wind turbine gearbox is able to enter by the pressure oil that oil injection structure sprays
Repairing is carried out to oil storage tank to oil storage tank, continues as planet wheel bearing lubrication, structure is simple, and processing cost is low.
Detailed description of the invention
Fig. 1 is a kind of intention of the planet carrier lubrication system of wind turbine gearbox as embodiment of the invention.
Planet carrier lubrication system 100, planet carrier 1, planet carrier bearing (2,9), oil injection structure 3, the first cabinet 4, pin shaft 5,
Planet wheel bearing 6, planetary gear 7, gear ring 8, the second cabinet 10, oil storage tank 11, oil duct 12, fuel feed hole 13.
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of planet carrier lubrication system 100 of wind turbine gearbox, comprising: cabinet, planet carrier 1, planet carrier
Bearing 2, planet carrier bearing 9, pin shaft 5, planetary gear 7, planet wheel bearing 6 and oil injection structure 3.
Cabinet includes: the first cabinet 4, gear ring 8 and the second cabinet 10.Gear ring 8 connects the first cabinet 4 and the second cabinet 10 simultaneously
Between the first cabinet 4 and the second cabinet 10.
Planet carrier 1 is installed by planet carrier bearing 2 and planet carrier bearing 9 to cabinet.Pin shaft 5 is installed to planet carrier 1.Planet
Several pin shafts 5 are installed on frame 1.Planetary gear 7 is installed by planet wheel bearing 6 to pin shaft 5.6 sets of planet wheel bearing are filled to pin
Axis 5.Planetary gear 7 is engaged with gear ring 8.
Pin shaft 5 is formed with oil storage tank 11 and oil duct 12.Oil duct 12 is connected to oil storage tank 11.
Oil duct 12 is 6 fuel feeding of planet wheel bearing to be lubricated.Further, oil duct 12 is used for the oil in oil storage tank 11
Planet wheel bearing 6 is oriented to as the lubrication of planet wheel bearing 6.
Planet carrier 1 is equipped with fuel feed hole 13.13 fuel feeding of fuel feed hole enters oil storage tank 11.
Oil storage tank 11 is aligned with fuel feed hole 13.The orifice area of oil storage tank 11 is less than the orifice area of fuel feed hole 13.Specifically
For, the diameter of fuel feed hole 13 is less than the diameter of oil storage tank 11.
Oil injection structure 3 is used for oil spout.Oil injection structure 3 can spray into oil to fuel feed hole 13 when being aligned with fuel feed hole 13.Make
For a kind of specific embodiment, oil injection structure 3 is spray head.Spray head is installed to cabinet.As optional embodiment, oil spout knot
Structure may be jet pipe or process the channel progress oil spout of fuel feeding flowing on cabinet.
Magazine ac lubricating oil.Lubricating oil forms oil sump in the congregate of cabinet.
Planet carrier 1 drives pin shaft 5 and planet wheel bearing 6 to rotate.The variation of the realization height of pin shaft 5.
When planet carrier 1 turns to fuel feed hole 13 and submerges oil sump, the oil in oil sump can enter oil storage tank via fuel feed hole 13
11.Oil storage tank 11 fills oil in oil sump.When fuel feed hole 13 is submerged to oil sump, the reception of fuel feed hole oil storage tank 11 enters oil inlet
Oil is provided to oil duct by the oil cake in hole 13.
Planet carrier 1 continues to rotate, since fuel feed hole 13 is smaller than the size of the oil storage tank 11 on pin shaft 5 on planet carrier 1, oil storage
Can still there be parts of lubricating oil in slot 11, the lubricating oil of storage flows into planet wheel bearing 6 by oil duct 12.Case can be made full use of
The lubricating oil of body bottom.Planet carrier 1 continues to rotate the height for improving fuel feed hole 13, is aligned when planet carrier 1 turns to fuel feed hole 13
When oil injection structure 3, the oil that oil injection structure 3 sprays can enter oil storage tank 11 via fuel feed hole 13.The oil that oil injection structure 3 sprays enters
When fuel feed hole 13, oil storage tank 11 can receive the oil entered in fuel feed hole 13 and oil is provided to oil duct 12.Oil injection structure 3 can be with
It is set to the top of cabinet.Oil injection structure is punched on pin shaft and planet carrier compared to traditional, reduces processing cost.
As a kind of specific embodiment, oil storage tank 11 is set to one end of pin shaft 5.
As a kind of specific embodiment, fuel feed hole 13 extends along the axis of pin shaft 5.
Oil storage tank 11 extends along the axis of pin shaft 5.Oil duct 12 is radially extended along the axis of pin shaft 5.The extension of oil duct 12
Extending direction of the direction perpendicular to fuel feed hole 13.The extending direction for extending perpendicularly to oil storage tank 11 of oil duct 12.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the above embodiments do not limit the invention in any form, all obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.
Claims (10)
1. a kind of planet carrier lubrication system of wind turbine gearbox, comprising: cabinet, planet carrier, planet carrier bearing, pin shaft, planetary gear
And planet wheel bearing；The planet carrier is installed by the planet carrier bearing to the cabinet；The pin shaft is installed to the row
Carrier；The planetary gear is installed by the planet wheel bearing to the pin shaft；It is characterized in that, the pin shaft is formed with oil storage
Slot and for by the oil in the oil storage tank be oriented to the planet wheel bearing be the planet wheel bearing lubrication oil duct；The oil
Road is connected to the oil storage tank；The planet carrier is equipped with the fuel feed hole that fuel feeding enters the oil storage tank；The oil storage tank with it is described
The orifice area of fuel feed hole alignment and the oil storage tank is less than the orifice area of the fuel feed hole；The planet of the wind turbine gearbox
Frame lubrication system further include: oil can be sprayed into when being aligned with the fuel feed hole to the oil injection structure of the fuel feed hole.
2. the planet carrier lubrication system of wind turbine gearbox according to claim 1, which is characterized in that
The oil storage tank is set to one end of the pin shaft.
3. the planet carrier lubrication system of wind turbine gearbox according to claim 1, which is characterized in that
The oil storage tank and the fuel feed hole extend along the axis of the pin shaft.
4. the planet carrier lubrication system of wind turbine gearbox according to claim 1, which is characterized in that
The oil duct is radially extended along the axis of the pin shaft.
5. the planet carrier lubrication system of wind turbine gearbox according to claim 1, which is characterized in that
The diameter of the fuel feed hole is less than the diameter of the oil storage tank.
6. the planet carrier lubrication system of wind turbine gearbox according to claim 1, which is characterized in that
The cabinet includes: the first cabinet, gear ring and the second cabinet；The gear ring connects first cabinet and second case
Body and between first cabinet and second cabinet.
7. a kind of planet carrier lubrication system of wind turbine gearbox, comprising: cabinet, planet carrier, planet carrier bearing, pin shaft, planetary gear
And planet wheel bearing；The planet carrier is installed by the planet carrier bearing to the cabinet；The pin shaft is installed to the row
Carrier；The planetary gear is installed by the planet wheel bearing to the pin shaft；It is characterized in that,
The planet carrier lubrication system of the wind turbine gearbox further include: the oil injection structure for oil spout；The pin shaft is formed with storage
Oil groove and for by the oil in the oil storage tank be oriented to the planet wheel bearing be the planet wheel bearing lubrication oil duct；It is described
Oil duct is connected to the oil storage tank；The planet carrier is equipped with the fuel feed hole that fuel feeding enters the oil storage tank；
When the planet carrier turns to the fuel feed hole and submerges oil sump, the oil in oil sump can enter the storage via the fuel feed hole
Oil groove；When the planet carrier turns to the fuel feed hole and is aligned the oil injection structure, oil that the oil injection structure sprays can be via
The fuel feed hole enters the oil storage tank.
8. the planet carrier lubrication system of wind turbine gearbox according to claim 7, which is characterized in that
The oil storage tank is aligned with the fuel feed hole and the orifice area of the oil storage tank is less than the orifice area of the fuel feed hole.
9. the planet carrier lubrication system of wind turbine gearbox according to claim 7, which is characterized in that
The fuel feed hole extends along the axis of the pin shaft.
10. the planet carrier lubrication system of wind turbine gearbox according to claim 7, which is characterized in that
The oil storage tank extends along the axis of the pin shaft；The oil storage tank is set to one end of the pin shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910558292.3A CN110185779A (en) | 2019-06-26 | 2019-06-26 | The planet carrier lubrication system of wind turbine gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910558292.3A CN110185779A (en) | 2019-06-26 | 2019-06-26 | The planet carrier lubrication system of wind turbine gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110185779A true CN110185779A (en) | 2019-08-30 |
Family
ID=67723443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910558292.3A Pending CN110185779A (en) | 2019-06-26 | 2019-06-26 | The planet carrier lubrication system of wind turbine gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110185779A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114165579A (en) * | 2021-12-28 | 2022-03-11 | 南京高速齿轮制造有限公司 | Planet carrier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010065741A (en) * | 2008-09-09 | 2010-03-25 | Honda Motor Co Ltd | Lubricating structure for vehicular automatic transmission |
| US20120157256A1 (en) * | 2010-12-20 | 2012-06-21 | Mitsubishi Heavy Industries, Ltd. | Bearing oil supply structure for wind turbine generator |
| CN105202169A (en) * | 2015-10-27 | 2015-12-30 | 太原重工股份有限公司 | Wind power step-up gear box |
| CN208057907U (en) * | 2018-02-26 | 2018-11-06 | 科力远混合动力技术有限公司 | Planetary lubrication system in hybrid power planet row |
| CN210423667U (en) * | 2019-06-26 | 2020-04-28 | 南京高速齿轮制造有限公司 | Planet carrier lubricating structure of wind power gear box |
-
2019
- 2019-06-26 CN CN201910558292.3A patent/CN110185779A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010065741A (en) * | 2008-09-09 | 2010-03-25 | Honda Motor Co Ltd | Lubricating structure for vehicular automatic transmission |
| US20120157256A1 (en) * | 2010-12-20 | 2012-06-21 | Mitsubishi Heavy Industries, Ltd. | Bearing oil supply structure for wind turbine generator |
| CN105202169A (en) * | 2015-10-27 | 2015-12-30 | 太原重工股份有限公司 | Wind power step-up gear box |
| CN208057907U (en) * | 2018-02-26 | 2018-11-06 | 科力远混合动力技术有限公司 | Planetary lubrication system in hybrid power planet row |
| CN210423667U (en) * | 2019-06-26 | 2020-04-28 | 南京高速齿轮制造有限公司 | Planet carrier lubricating structure of wind power gear box |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114165579A (en) * | 2021-12-28 | 2022-03-11 | 南京高速齿轮制造有限公司 | Planet carrier |
| CN114165579B (en) * | 2021-12-28 | 2023-12-22 | 南京高速齿轮制造有限公司 | Planet carrier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191008 Address after: 211103 Jiangning Science Park, Nanjing, Jiangsu, 1 Tianyuan East Road. Applicant after: Nanjing High Speed Gear Manufacturing Co., Ltd. Applicant after: Nanjing High Precision Transmission Equipment Manufacturing Group Co., Ltd. Address before: 211103 Jiangning Science Park, Nanjing, Jiangsu, 1 Tianyuan East Road. Applicant before: Nanjing High Speed Gear Manufacturing Co., Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200508 Address after: 211103 No.30, Houjiao Road, gaoxinyuan, Jiangning District, Nanjing City, Jiangsu Province Applicant after: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Address before: 211103 Jiangning Science Park, Nanjing, Jiangsu, 1 Tianyuan East Road. Applicant before: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Applicant before: Nanjing High Precision Transmission Equipment Manufacturing Group Co., Ltd. |