CN108442981A - A kind of dual-active plug ring variable-nozzle assembly - Google Patents
A kind of dual-active plug ring variable-nozzle assembly Download PDFInfo
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- CN108442981A CN108442981A CN201810508841.1A CN201810508841A CN108442981A CN 108442981 A CN108442981 A CN 108442981A CN 201810508841 A CN201810508841 A CN 201810508841A CN 108442981 A CN108442981 A CN 108442981A
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- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000013461 design Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 5
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- 230000008569 process Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 241001672694 Citrus reticulata Species 0.000 description 1
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- 238000001816 cooling Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The invention discloses a kind of dual-active plug ring variable-nozzle assemblies, it is related to field of turbochargers, including positioning pin, cover board, upper piston ring, aperture ring, lower piston ring, nozzle ring, nozzle ring is circular ring shape, including nozzle vane, air inlet duct, lower piston ring mounting groove and base plate；Aperture ring is annular, including aperture slot, fork slot and is blocked；Cover board includes positioning pin mounting hole, upper piston ring mounting groove and sealing plate, and cover board is between nozzle ring and volute, and bottom is equipped with piston ring mounting groove, and for installing upper piston ring, cover board is circumferentially uniformly provided with positioning pin mounting hole.The present invention can improve the ride comfort and aeroperformance of the rotation of aperture ring, while reduce the wear extent of aperture ring, extend the service life of nozzle assembly.
Description
Technical field
The present invention relates to field of turbochargers more particularly to a kind of dual-active plug ring variable-nozzle assemblies.
Background technology
Turbocharger is the device being used in combination with internal combustion engine, and engine charge is transported to for passing through compression
Mouthful air mix with fuel and burning increases the power output of engine within the engine.Turbocharger includes peace
Mounted in compressor impeller in compressor housing and the turbine in turbine cylinder.Wherein, turbine cylinder and compressor
Shell is separately formed, and also has another middle casing to be connected between turbine cylinder and compressor housing, is used for axis
The installation held and cooling and lubricating.Turbine cylinder limits the general toroidal runner for surrounding turbine, and exhaust is from engine into becoming a mandarin
Road simultaneously blows to turbine, and drives turbine rotation, and turbine drives coaxially connected compressor to rotate.Air passes through compressor impeller
It is compressed, is then connected to from housing outlets to engine intake.
Come one of booster aspect of performance challenge it is being entire work model in engine using turbocharger
Enclose the interior engine power output for realizing desired size.It has been found that utilizing the turbocharger of fixed nozzle size usually not
It is easy to reach the purpose；By adjusting the inlet air flow of the turbine of turbocharger, improving control from turbocharger to correlation
Well known operational advantages are provided in terms of the ability of the supercharging amount of internal combustion engine conveying.By leading to the spray in turbine wheel
Variable geometry is combined in mouth, realizes the adjusting to backblast turbine.By changing the size in Flow in Nozzle region,
The adjustable flow into turbine wheel, to adjust the total boost provided by the compressor of turbocharger.
The nozzle of geometry-variable for turbocharger is generally divided into two main Types at present：Variable-vane sprays
Mouth and sliding plunger nozzle.Blade is typically included in turbine nozzle, for guiding exhaust into turbine along advantageous direction.
For variable-vane nozzle, row's circumferentially spaced bucket extends axially through nozzle, and can be driven with driven device
It rotates synchronously.Exhaust from volute flow passage flows through the access between blade radially inward, and blade can change
The direction of air-flow flowing, to be flowed into turbine wheel along desired direction guiding exhaust gas.In most of variable-vane nozzles,
Blade, which can enclose, to be rotated about the axis thereof, to change the angle set by blade, to change the flow region of access between blade.It is variable
Blade cut-out governing is more flexible, but complicated structure limits the use scope of variable-vane nozzle, due to movement zero
Part is more, easily occurs the risk of clamping stagnation failure at high temperature, so the use temperature range of variable-vane nozzle is restricted；
Simultaneously as variable-vane nozzle is complicated, cost is relatively high, equally also limits its application range.
In the nozzle of sliding-piston type, nozzle can also include blade, but blade is fixed on suitable position.It is logical
The piston that slides axially slided in the hole in turbine shroud is crossed, the change in Flow in Nozzle region is realized.Piston is tubulose
, and it is located just at the inner radial of nozzle.The axial movement of piston effectively changes the axis of the introducing turbine wheel of nozzle
To degree, to change " throat region " in turbine wheel inlet.When blade is included in nozzle, piston can be neighbouring
It slides at the inner radial edge (that is, rear) of blade；Alternately, piston and blade can be radially overlapped, and piston can
Including notch, at least part for accommodating blade when piston slides axially to adjust nozzle.It lives for this sliding
Plunger type nozzle, is not widely used, mainly since its control structure is difficult to be arranged, since its piston is needed in axial direction
Sliding, so control mechanism is also required to be axial control, since volute side is connected with middle case, side and vent gas treatment pipe
Road is connected, so control mechanism is difficult to be disposed in axial direction.
The variable-nozzle of variable-vane type and sliding-piston type, the two all have merits and demerits.For example, with rotatable
The variable-vane nozzle of blade usually has good aerodynamic quality, but since there are many quantity of movable members, so
It is mechanically very complicated.Sliding-piston type variable nozzle is mechanically much simpler, has seldom movable members, but usually in sky
Be not as good as variable-vane nozzle on aerodynamic force.
Our company has been filed on patent application, and (Patent No. 201810373619.5, patent name is " for turbocharger
Variable-nozzle and its control method and turbocharger "), with feasible design structure, gathers blade type nozzle and lived with sliding
The advantages of plunger type nozzle, simple in structure, production cost is low, and control is easy to implement.On the basis of the invention, the technology of this field
A kind of dual-active plug ring variable-nozzle assembly of staff development makes the rotation of aperture ring more smooth out, and aeroperformance is more preferable, while also reducing and opening
The wear extent for spending ring, extends the service life of nozzle assembly.
Invention content
In view of the drawbacks described above of the prior art, the technical problem to be solved by the present invention is to further increase aperture ring to turn
Dynamic ride comfort and aeroperformance, while the wear extent of aperture ring is reduced, extend the service life of nozzle assembly.
To achieve the above object, the present invention provides a kind of dual-active plug ring variable-nozzle assembly, including positioning pin, cover board,
Upper piston ring, aperture ring, lower piston ring, nozzle ring, nozzle ring are circular ring shape, including nozzle vane, air inlet duct, lower piston ring peace
Tankage and base plate, circumferentially uniform array is located at the one side of nozzle ring to several nozzle vanes, between contiguous nozzle vanes
Opening portion, that is, air inlet duct for guiding exhaust gas to blow to turbine, nozzle vane bottom is equipped with piston ring mounting groove, for installing
Lower piston ring；Aperture ring is annular, including aperture slot, fork slot and is blocked, and aperture ring diameter size is slightly larger than nozzle ring, aperture
Ring circumferential direction uniform design has several aperture slots, quantity identical as nozzle vane quantity；Aperture ring is located on the outside of nozzle ring, control spray
Mouth opening size；Cover board includes positioning pin mounting hole, upper piston ring mounting groove and sealing plate, cover board be located at nozzle ring and volute it
Between, bottom is equipped with piston ring mounting groove, and for installing upper piston ring, cover board is circumferentially uniformly provided with positioning pin mounting hole.
Further, nozzle vane is a part for nozzle ring, and the two is an entirety, and the angle of nozzle vane is fixed not
It is adjustable.
Further, nozzle vane angle is the incident angle of efficiency optimization.
Further, the air inlet duct between the circumferential width and nozzle vane of aperture slot is roughly equal, the height of aperture slot
It is roughly equal with the height of nozzle vane, when the aperture slot on aperture ring and the air inlet duct overlapping area between nozzle vane are maximum
When, nozzle assembly aperture is maximum, and when aperture slot and air inlet duct overlapping area minimum, nozzle assembly aperture is minimum, on aperture ring
Aperture slot and nozzle vane between the area that overlaps of air inlet duct determine the opening size of nozzle assembly, on aperture ring
Area that air inlet duct between aperture slot and nozzle vane overlaps is maximum, minimum needs to be arranged according to engine actual demand.
Further, aperture annulate shaft is designed with fork slot and shift fork to side, and shift fork stirs the movement of aperture ring in the position,
Adjust opening size.
Further, shift fork stirs fork slot, driving aperture ring rotation in rotary manner.
Further, there are many modes of shift fork, it can be electric actuator driving, can also be pneumatic actuator
Driving.
Further, nozzle ring and cover board provide axial positioning function, it is contemplated that the risk of high temperature clamping stagnation, cover board and nozzle
The distance between land rank is larger than the height of aperture ring, i.e. aperture annulate shaft is to will be there are certain free gap, outside cover board
Diameter is larger than the internal diameter of aperture ring.
Further, aperture annulate shaft to free gap be 0.1~0.5mm.
Further, upper piston ring and lower piston ring provide radial positioning function, and upper piston ring and lower piston ring internal diameter omit
More than piston ring mounting groove outer diameter, upper piston ring and lower piston ring outer diameter are slightly less than aperture ring internal diameter, upper piston ring and lower piston
Ring can be freely rotated on piston ring mounting groove, and aperture ring can also be freely rotated around piston ring.
Further, upper piston ring and the lower piston ring provide circumferential guide function, in aperture ring rotation process, on
Piston ring and the lower piston are avoided around piston ring mounting groove rotation between aperture ring and upper piston ring and the lower piston ring
Hard friction, reduces the driving force of aperture ring, in addition, due to upper piston ring and the lower piston ring aperture ring is provided it is circumferential
Support and guiding, improve enabling capabilities and have shared wear extent, improve abrasive resistance and reliability.
The dual-active plug ring variable-nozzle assembly that the present invention designs has the following technical effects：
1, the fairness of driving is improved；
2, the frictional force of driving is reduced；
3, the wear extent of aperture ring and nozzle ring is reduced；
4, the life and reliability of component is improved.
The technique effect of the design of the present invention, concrete structure and generation is described further below with reference to attached drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Description of the drawings
Fig. 1 is the dual-active plug ring variable-nozzle assembly explosive view of the preferred embodiment of the present invention；
Fig. 2 is the nozzle ring schematic diagram of the preferred embodiment of the present invention；
Fig. 3 is the aperture ring schematic diagram of the preferred embodiment of the present invention；
Fig. 4 is the cover plate schematic diagram of the preferred embodiment of the present invention；
Fig. 5 is the dual-active plug ring variable-nozzle assembly scheme of installation of the preferred embodiment of the present invention；
Fig. 6 is the dual-active plug ring variable-nozzle assembly partial enlarged view of the preferred embodiment of the present invention.
Specific implementation mode
Multiple preferred embodiments that the present invention is introduced below with reference to Figure of description, keep its technology contents more clear and just
In understanding.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention not only limits
The embodiment that Yu Wenzhong is mentioned.
In the accompanying drawings, the identical component of structure is indicated with same numbers label, everywhere the similar component of structure or function with
Like numeral label indicates.The size and thickness of each component shown in the drawings are to be arbitrarily shown, and there is no limit by the present invention
The size and thickness of each component.In order to keep diagram apparent, some places suitably exaggerate the thickness of component in attached drawing.
As shown in Figure 1 and Figure 5, a kind of dual-active plug ring variable-nozzle assembly of the present embodiment design includes positioning pin 1, cover board
2, upper piston ring 3, aperture ring 4, lower piston ring 5 and nozzle ring 6.
As shown in Fig. 2, nozzle ring 6 is circular ring shape, including nozzle vane 61, air inlet duct 62,63 and of lower piston ring mounting groove
Base plate 64, circumferentially uniform array is located at the one side of nozzle ring 6 to several nozzle vanes 61, between contiguous nozzle vanes 61
Opening portion, that is, air inlet duct 62 for guiding exhaust gas to blow to turbine, 61 bottom of nozzle vane is equipped with piston ring mounting groove 63, uses
In installation lower piston ring 5；Nozzle vane 61 is a part for nozzle ring 6, and the two is an entirety, and the angle of nozzle vane 61 is solid
Surely it cannot be adjusted, 61 angle of nozzle vane is the incident angle of efficiency optimization.
As shown in figure 3, aperture ring 4 is annular, including aperture slot 41, fork slot 42 and 43 are blocked, 4 diameter dimension of aperture ring
Slightly larger than nozzle ring 6, the circumferential uniform design of aperture ring 4 has several aperture slots 41, quantity identical as 61 quantity of nozzle vane；Aperture
Ring 4 is located at 6 outside of nozzle ring, controls nozzle opening size；Air inlet duct between the circumferential width and nozzle vane 61 of aperture slot 4
62 is roughly equal, and the height and the height of nozzle vane 61 of aperture slot 41 are roughly equal, when on aperture ring 4 aperture slot 41 with spray
When 62 overlapping area maximum of air inlet duct between mouth blade 61, nozzle assembly aperture is maximum, when aperture slot 41 and 62 weight of air inlet duct
When closing area minimum, nozzle assembly aperture is minimum, 62 weight of air inlet duct between aperture slot 41 and nozzle vane 61 on aperture ring 4
The area of conjunction determines the opening size of nozzle assembly, the air inlet duct between the aperture slot 41 on aperture ring 4 and nozzle vane 61
62 area maximum, the minimums overlapped need to be arranged according to engine actual demand；The axial side of aperture ring 4 is designed with fork slot 42
And shift fork, shift fork stir the movement of aperture ring, that is, adjust opening size in the position, shift fork stirs fork slot in rotary manner,
The rotation of aperture ring, the mode of shift fork is driven to be driven using electric actuator.
As shown in figure 4, cover board 2 includes positioning pin mounting hole 21, upper piston ring mounting groove 22 and sealing plate 23, cover board 2
Between nozzle ring 6 and volute, bottom is equipped with piston ring mounting groove 22, and for installing upper piston ring 3, cover board 2 is circumferentially uniform
Equipped with positioning pin mounting hole 21, for installing positioning pin 1.
As shown in fig. 6, nozzle ring 6 and cover board 2 provide axial positioning function, it is contemplated that the risk of high temperature clamping stagnation, cover board 2 with
The distance between nozzle ring step 65 is larger than the height of aperture ring 4, i.e., axial direction will there are between certain activity for aperture ring 4
Gap, free gap 0.3mm, 2 outer diameter of cover board are larger than the internal diameter of aperture ring 4.Upper piston ring 3 and lower piston ring 5 provide diameter
To positioning function, upper piston ring 3 and 5 internal diameter of lower piston ring are slightly larger than piston ring mounting groove outer diameter, upper piston ring 3 and lower piston ring
5 outer diameter is slightly less than 4 internal diameter of aperture ring, and upper piston ring 3 and lower piston ring 5 can be freely rotated on piston ring mounting groove, aperture
Ring 4 can also be freely rotated around piston ring.Upper piston ring 3 and lower piston ring 5 provide circumferential guide function, are rotated in aperture ring 4
Cheng Zhong, upper piston ring 3 and lower piston ring 5 can also be rotated around piston ring mounting groove, aperture ring 4 and upper piston ring 3 and lower piston
Hard friction is avoided between ring 5, reduces the driving force of aperture ring 4, in addition, since upper piston ring 3 and lower piston ring 5 are to aperture
Ring 4 provides circumferential support and is oriented to, and improves enabling capabilities and has shared wear extent, improves abrasive resistance and reliability.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be in the protection domain being defined in the patent claims.
Claims (10)
1. a kind of dual-active plug ring variable-nozzle assembly, which is characterized in that including positioning pin, cover board, upper piston ring, aperture ring, under
Piston ring, nozzle ring, the nozzle ring are circular ring shape, including nozzle vane, air inlet duct, lower piston ring mounting groove and base plate,
Circumferentially uniform array is located at the one side of the nozzle ring to several described nozzle vanes, between the adjacent nozzle vane
Opening portion is air inlet duct, and the nozzle vane bottom is equipped with lower piston ring mounting groove, for installing lower piston ring；The aperture
Ring is annular, including aperture slot, fork slot and is blocked, and the aperture ring diameter size is slightly larger than the nozzle ring, the aperture
Ring circumferential direction uniform design has several aperture slots, quantity identical as the nozzle vane quantity；The aperture ring is located at the nozzle
On the outside of ring, nozzle opening size is controlled；The cover board includes positioning pin mounting hole, upper piston ring mounting groove and sealing plate, described
Cover board is between the nozzle ring and volute, and bottom is equipped with piston ring mounting groove, for installing upper piston ring, the cover board edge
Even circumferential is equipped with positioning pin mounting hole.
2. dual-active plug ring variable-nozzle assembly as described in claim 1, which is characterized in that the nozzle vane is nozzle ring
A part, the two are an entirety, and the angle fixation of nozzle vane cannot be adjusted.
3. dual-active plug ring variable-nozzle assembly as claimed in claim 2, which is characterized in that the nozzle vane angle is efficiency
Optimal incident angle.
4. dual-active plug ring variable-nozzle assembly as described in claim 1, which is characterized in that the circumferential width of the aperture slot with
The air inlet duct is roughly equal, and the height of the aperture slot is equal with the height of the nozzle vane, when the aperture slot and institute
When stating air inlet duct overlapping area maximum, nozzle assembly aperture is maximum, when the aperture slot and the air inlet duct overlapping area are minimum
When, nozzle assembly aperture is minimum, and the area that the aperture slot is overlapped with the air inlet duct determines the opening size of nozzle assembly.
5. dual-active plug ring variable-nozzle assembly as described in claim 1 or 4, which is characterized in that the aperture annulate shaft is to side
It is designed with fork slot and shift fork, shift fork stirs the movement of aperture ring, adjusts opening size in the position.
6. dual-active plug ring variable-nozzle assembly as claimed in claim 5, which is characterized in that the shift fork is dialled in rotary manner
Dynamic fork slot, driving aperture ring rotation.
7. dual-active plug ring variable-nozzle assembly as claimed in claim 6, which is characterized in that the type of drive of the shift fork is electricity
Control actuator driven or pneumatic actuator driving.
8. dual-active plug ring variable-nozzle assembly as described in claim 1, which is characterized in that the nozzle ring and the cover board carry
For axial positioning function, the distance between the cover board and nozzle ring step are slightly larger than the height of the aperture ring, the aperture
Annulate shaft is to will there are certain free gaps, the cover board outer diameter to be larger than the internal diameter of the aperture ring.
9. dual-active plug ring variable-nozzle assembly as claimed in claim 8, which is characterized in that the free gap be 0.1~
0.5mm。
10. dual-active plug ring variable-nozzle assembly as described in claim 1, which is characterized in that the upper piston ring and it is described under
Piston ring provides radial positioning function, and the upper piston ring and the lower piston ring internal diameter are slightly larger than piston ring mounting groove outer diameter,
The upper piston ring and the lower piston ring outer diameter are slightly less than the aperture ring internal diameter, the upper piston ring and the lower piston ring
It can be freely rotated on piston ring mounting groove, aperture ring can also be freely rotated around piston ring；The upper piston ring and the lower work
Plug ring provides circumferential guide function, and in the aperture ring rotation process, the upper piston ring and the lower piston are around piston
Ring mounting groove rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810508841.1A CN108442981B (en) | 2018-05-24 | 2018-05-24 | Double-piston-ring variable nozzle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810508841.1A CN108442981B (en) | 2018-05-24 | 2018-05-24 | Double-piston-ring variable nozzle assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108442981A true CN108442981A (en) | 2018-08-24 |
| CN108442981B CN108442981B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810508841.1A Active CN108442981B (en) | 2018-05-24 | 2018-05-24 | Double-piston-ring variable nozzle assembly |
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| Country | Link |
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| CN (1) | CN108442981B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089811A (en) * | 2019-12-25 | 2020-05-01 | 浙江浙能兰溪发电有限责任公司 | Wear detection method for nozzle ring of roller disc type coal mill |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3127909A (en) * | 1962-07-18 | 1964-04-07 | Honeywell Regulator Co | Rotary gate valve |
| CN103821609A (en) * | 2012-11-15 | 2014-05-28 | 霍尼韦尔国际公司 | Turbocharger and variable-nozzle assembly therefor |
| US20170328234A1 (en) * | 2016-05-16 | 2017-11-16 | General Electric Company | Moveable nozzle assembly and method for a turbocharger |
| CN208294574U (en) * | 2018-05-24 | 2018-12-28 | 奕森科技（上海）有限公司 | A kind of dual-active plug ring variable-nozzle assembly |
-
2018
- 2018-05-24 CN CN201810508841.1A patent/CN108442981B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3127909A (en) * | 1962-07-18 | 1964-04-07 | Honeywell Regulator Co | Rotary gate valve |
| CN103821609A (en) * | 2012-11-15 | 2014-05-28 | 霍尼韦尔国际公司 | Turbocharger and variable-nozzle assembly therefor |
| US20170328234A1 (en) * | 2016-05-16 | 2017-11-16 | General Electric Company | Moveable nozzle assembly and method for a turbocharger |
| CN208294574U (en) * | 2018-05-24 | 2018-12-28 | 奕森科技（上海）有限公司 | A kind of dual-active plug ring variable-nozzle assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089811A (en) * | 2019-12-25 | 2020-05-01 | 浙江浙能兰溪发电有限责任公司 | Wear detection method for nozzle ring of roller disc type coal mill |
| CN111089811B (en) * | 2019-12-25 | 2022-04-22 | 浙江浙能兰溪发电有限责任公司 | Wear detection method for nozzle ring of roller disc type coal mill |
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| Publication number | Publication date |
|---|---|
| CN108442981B (en) | 2024-03-26 |
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Effective date of registration: 20210330 Address after: 215506 no.1150, Southeast Avenue, Southeast street, Changshu City, Suzhou City, Jiangsu Province Applicant after: Eason Technology (Jiangsu) Co.,Ltd. Address before: 201703 1st floor, building 1, 518 Songhui Road, Qingpu District, Shanghai Applicant before: ISEM TECHNOLOGIES (SHANGHAI) Co. |
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