CN107725476B - A kind of adjustable hydraulic propeller of blade-section - Google Patents
A kind of adjustable hydraulic propeller of blade-section Download PDFInfo
- Publication number
- CN107725476B CN107725476B CN201710887484.XA CN201710887484A CN107725476B CN 107725476 B CN107725476 B CN 107725476B CN 201710887484 A CN201710887484 A CN 201710887484A CN 107725476 B CN107725476 B CN 107725476B
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- blade
- hub
- impeller hub
- impeller
- section
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000008859 change Effects 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 abstract description 17
- 238000013461 design Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
- B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/0467—Spherical bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
- B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
- B63H2011/084—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type with two or more pump stages
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Hydraulic Turbines (AREA)
Abstract
The present invention relates to a kind of adjustable hydraulic propellers of blade-section, including water inlet flow channel, pump shaft, bucket front, blade, bucket rear, impeller hub, guide vane, blade rotation valve, nozzle, magnetic force sliding sleeve, guide vane hub, bearing and bevel gear, one end of the pump shaft passes through water inlet flow channel and connect with impeller hub, bearing is mounted on the end of impeller hub, the end connection of guide vane hub and impeller hub；Blade is axial-flow type, and bucket front and bucket rear including disconnection, bucket front are fixed on impeller hub, and bucket rear can rotate valve rotation around blade；The present invention passes through the impeller blade of Optimizing Reconstruction water jet propulsion pump, so that spray pump blade realizes that part is adjustable, under the premise of not changing vane inlet laying angle, change blade exit laying angle by adjusting partial blade, so that water jet propulsion pump is also at optimal operating condition point operation under variable working condition, the working efficiency for greatly improving spray pump resists and cavitation performance, increases its service life.
Description
Technical field
The invention belongs to a kind of aial flow impellers of water-jet device peculiar to vessel, and in particular to a kind of blade-section is adjustable
Section formula hydraulic propeller, by adjusting blade-section, so that water jet propulsion pump peculiar to vessel adapts to ship departure, accelerates, turning, falls
The variable parameter operations state such as vehicle, traction, translation, improves the working efficiency of spray pump, improves the anti-cavitation performance of spray pump, increasing it makes
Use the service life.
Technical background
Hydraulic propeller peculiar to vessel is high with mobility, maneuverability is good, anti-cavitation ability is strong, resistance is small, vibration and noise is low,
Shallow-water navigation is adaptable, high speed when propulsive efficiency it is high the advantages that, have on Fast passenger ferry and military high-performance naval vessel wide
General application.As the core component of hydraulic propeller, the theory of water jet propulsion pump is broken through with design in recent decades
The development of property.
It is well known that various special circumstances can be encountered when ship is run on the water, and such as: departure accelerates, turns
Situations such as curved, reversing, traction, translation, it can all make water jet propulsion pump be under inclined operating condition and run.Operation can drop under this state
The working efficiency of low spray pump, the service life for generating cavitation, reducing spray pump.In the design process of existing hydraulic jet propulsion impeller of pump,
Few solution design methods that system is provided for such operating condition.Therefore, water jet propulsion pump is efficiently transported under inclined operating condition
Row is that Ship Propeling technology industry is badly in need of.
Application No. is a kind of mixed-flow water jet propulsion pump is disclosed in No. 201110087127.8 Chinese invention patents
Blade angle full-adjusting device, but there is no optimize the basic structure of vane pump to this patent.Application No. is
A kind of axial flow water jet propulsion pump is disclosed in No. 201110199640.6 Chinese invention patents, but this patent is only a simplified
The structure of water jet propulsion pump, there is no optimize impeller blade to improve the working efficiency of spray pump.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of adjustable hydraulic propeller of blade-section, Optimizing Reconstruction water spray is pushed away
Under the premise of not changing vane inlet laying angle, pass through into the impeller blade of pump so that spray pump blade realizes that part is adjustable
It adjusts partial blade and changes blade exit laying angle, so that water jet propulsion pump is also at optimal operating condition point operation under variable working condition,
The working efficiency for improving spray pump resists and cavitation performance, increases its service life.
Realizing technical solution used by above-mentioned purpose is: a kind of adjustable hydraulic propeller of blade-section, including pushes away
Into device main body；The propeller main body includes water inlet flow channel, pump shaft, bucket front, blade, bucket rear, impeller hub, leads
Leaf, blade rotation valve, nozzle, guide vane hub and bearing；
One end of the pump shaft passes through water inlet flow channel and connect with impeller hub, and bearing is mounted on the end of impeller hub, leads
The connection of the end of hub and impeller hub；Blade is axial-flow type, bucket front and bucket rear including disconnection, and bucket front is solid
Be scheduled on impeller hub, bucket rear and blade rotation valve core upper end be welded as a whole, blade rotate valve body shell with
Impeller hub is connected through a screw thread；
Containing the smooth cylinder sleeve being linked together with wheel hub inside the impeller hub, magnetic force sliding sleeve is covered in light
On sliding cylindrical sleeve；The lower end of blade rotation valve core on the impeller hub is connect by connecting rod with elastic force bar one end,
The other end of elastic force bar is connected with magnetic force sliding sleeve；
The magnetic force sliding sleeve can drive elastic force bar along light with the change in the electric coil magnetic field being mounted in guide vane
Sliding cylindrical sleeve horizontally slips, and elastic force bar drives link motion, connecting rod that axial force is changed into rotation torque, and band movable vane piece turns
Dynamic valve rotation, so that bucket rear can rotate clockwise or counterclockwise certain angle as blade rotates valve；
The guide vane inward flange is fixedly connected with guide vane hub, and guide vane outer edge is fixedly connected with runner inner wall.
In above scheme, the bucket front and bucket rear length ratio range are 2/3~3/2, blade interior thickness
It is 1.2~1.5 times bigger than the thickness at vane inlet place, improve the hydraulic performance of spray pump.
In above scheme, it is 0 degree that the blade section, which is overlapped, improves the adaptability of impeller variable parameter operation.
In above scheme, the angle that the bucket rear can rotate valve rotation with blade is -30 °~30 °.
It is improved by the angle of the rotation setting of bucket rear so that water jet propulsion pump is in optimal operating condition point operation
The working efficiency of spray pump.One impeller is transformed to first, secondary both stage impellers when bucket rear rotation simultaneously, and influent stream passes through
The precompressed of primary runner, to improve the anti-cavitation performance of spray pump, increases so that secondary impeller inlet pressure increases
Its service life.
Further, there are finish glue in the blade rotation valve and connecting rod junction and the junction of elastic force bar and connecting rod
Body graphite mixed lubrication, the effects of good high temperature resistant, lubricating and wear-resisting can be played.
In above scheme, one end of the pump shaft is connected by key impeller hub, and the bearing is mounted on impeller hub
It end and is fixed by hex nut.
Further, the bearing of the impeller is the deep groove ball bearing of self-lubricating.
It further include bevel gear in above scheme；The other end that the pump shaft is located at outside water inlet flow channel is equipped with the cone tooth
Wheel.
Compared with prior art, the invention has the benefit that
1. the present invention optimizes transformation to the impeller blade of hydraulic propeller, it is adjusted and is not being changed by blade-section
Under the premise of import laying angle, change the outlet laying angle of blade, so that hydraulic propeller is in various variable parameter operation shapes
Can be in optimal operating condition point under state, reduce loss of efficiency, improve anti-cavitation performance, increase hydraulic propeller make the service life.
2. the present invention is by operating space oblique leverage so that mixed flow hydraulic propeller blade synchronization around own axes just
The angle of setting is rotated backward, to improve efficiency, noise and vibration is reduced, improves anti-foams performance.
3. the present invention is by stretching out except bending to one cone tooth of setting on that section of pump shaft between the first outer bearing carrier
The point diameter of wheel, the bevel gear is less than its rear end.Power is inputed into axial flow water jet propulsion pump from the direction perpendicular to pump shaft,
It is not necessary to be equipped with large-scale transfer case or more small-sized transfer cases, not only simplifies structure, reduce axial dimension length, alleviate weight
Amount, and also reduce manufacturing cost.
Detailed description of the invention
Fig. 1 is the overall schematic of the hydraulic propeller.
Fig. 2 is the cross-sectional view of the hydraulic propeller.
Fig. 3 is the partial cross-sectional view at Fig. 2 hydraulic propeller impeller A.
Fig. 4 is the enlarged drawing of blade.
Wherein: 1. water inlet flow channels, 2. pump shafts, 3. bucket fronts, 4. blades, 5. bucket rears, 6. impeller hubs, 7. lead
Leaf, 8. blades rotation valve, 9. nozzles, 10. elastic force bars, 11. magnetic force sliding sleeves, 12. guide vane hubs, 13. bearings, 14. keys, 15.
Section, 16. outlet edges, 17. water inlet sides, 18. bevel gears.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and detailed description:
As shown in attached drawing 1,2,3,4, Fig. 1 is the overall schematic of the hydraulic propeller, and Fig. 2 is cuing open for the hydraulic propeller
View, Fig. 3 are the partial cross-sectional views at Fig. 2 hydraulic propeller impeller A, and Fig. 4 is the enlarged drawing of blade.
A kind of adjustable hydraulic propeller of blade-section, including propeller main body；The propeller main body mainly by into
Water flow passage 1, pump shaft 2, bucket front 3, blade 4, bucket rear 5, impeller hub 6, guide vane 7, blade rotate valve 8, nozzle 9, bullet
Each component composition such as power bar 10, magnetic force sliding sleeve 11, guide vane hub 12, bearing 13, key 14 and bevel gear 18.
As shown in Fig. 2,3 and 4, one end of the pump shaft 2 passes through water inlet flow channel 1 and is connect by key 14 with impeller hub 6, pumps
The other end of axis 2 is equipped with bevel gear 18, which simplifies structure, reduce axial dimension length, alleviate weight simultaneously
And manufacturing cost is reduced, bearing 13 is mounted on the end of impeller hub 6, and the thrust bearing 13 of the impeller is the depth of self-lubricating
Ditch ball bearing.The guide vane hub 12 is connect with the end of impeller hub 6；7 inward flange of guide vane is fixedly connected with guide vane hub 12,
7 outer edge of guide vane is fixedly connected with runner inner wall.The blade 4 of the impeller is axial-flow type, and the blade 4 is by being fixed on impeller wheel
The bucket front 3 of hub 6 and can around blade rotate valve clockwise, rotate counterclockwise certain angle bucket rear 5 form, blade
4 interior thickness are 1.2~1.5 times bigger than vane inlet place, and bucket front 3 and 5 length ratio range of bucket rear are 2/3~3/2,
Improve the hydraulic performance of spray pump.
Containing the smooth cylinder sleeve that is linked together with wheel hub inside the impeller hub 6,11 sets of magnetic force sliding sleeve
On smooth cylinder sleeve；Blade rotation valve 8 on the impeller hub 6 passes through elastic force bar 10 and 11 phase of magnetic force sliding sleeve
Connection.
The blade rotation valve 8 is connect with one end of elastic force bar 10 by connecting rod, and the other end of elastic force bar 10 connects magnetic force
Sliding sleeve 11.The magnetic force sliding sleeve 11 can with hot-wire coil generate magnetic field change drive elastic force bar 10 along with leaf
The smooth cylinder sleeve that wheel wheel hub 6 is linked together horizontally slips, and elastic force bar 10 drives link motion, connecting rod to change axial force
For rotation torque, band movable vane piece rotation valve 8 rotates, so that bucket rear 5 rotates set angle.The blade rotates valve 8
Finish aquadag mixed lubrication is used with connecting rod junction and the junction of elastic force bar 10 and connecting rod.
The bucket rear 5 is welded as a whole with blade rotation valve 8, and blade rotates valve 8 and passes through angular thread and impeller wheel
Hub 6 is connected.The bucket rear 5 of the impeller can rotate valve 8 with blade and rotate certain degree, and blade rotates valve 8 and elastic force
It is connected between bar 10 by the connecting rod of certain length, the length of connecting rod may make the angle of rotation of bucket rear 5 in -30 °~30 ° models
Enclose interior adjusting.It is improved by the angle of the rotation setting of bucket rear 5 so that hydraulic propeller is in optimal operating condition point operation
The working efficiency of spray pump.One impeller is transformed to first, secondary both stage impellers when bucket rear 5 rotates simultaneously, and influent stream is logical
The precompressed of primary runner is crossed, so that secondary impeller inlet pressure increases, to improve the anti-cavitation performance of spray pump, is increased
Add its service life.
As shown in figure 4, it is 0 degree that 4 section 15 of blade, which is overlapped, the adaptability of impeller variable parameter operation is improved.Water outlet
The rotation that side 16 can rotate valve 8 by blade, which changes, places angle, so that impeller adapts to variable parameter operation, improves the work of impeller
Make efficiency.Side 17 intake according to axial-flow pump design theory, is designed as fixedly secured angle.
The present invention passes through the impeller blade of Optimizing Reconstruction hydraulic propeller, so that hydraulic propeller blade realizes that part is adjustable
Section changes blade exit laying angle by adjusting partial blade, so that water spray under the premise of not changing vane inlet laying angle
Propeller is also at optimal operating condition point operation under variable working condition, and the working efficiency for greatly improving hydraulic propeller resists and cavitation
Can, increase its service life.
The series of detailed descriptions listed above are illustrated only for possible embodiments of the invention,
The protection scope that they are not intended to limit the invention, it is all without departing from equivalent embodiment made by technical spirit of the present invention or change
It should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of adjustable hydraulic propeller of blade-section, which is characterized in that including propeller main body；The propeller main body
Including water inlet flow channel (1), pump shaft (2), bucket front (3), blade (4), bucket rear (5), impeller hub (6), guide vane (7),
Blade rotates valve (8), nozzle (9), guide vane hub (12) and bearing (13)；
One end of the pump shaft (2) passes through water inlet flow channel (1) and connect with impeller hub (6), and bearing (13) is mounted on impeller hub
(6) end, guide vane hub (12) are connect with the end of impeller hub (6)；Blade (4) is axial-flow type, before the blade including disconnection
Portion (3) and bucket rear (5), bucket front (3) are fixed on impeller hub (6), bucket rear (5) and blade rotation valve (8)
The upper end of spool is welded as a whole, and blade rotation valve (8) valve shell is connected through a screw thread with impeller hub (6)；
Contain the smooth cylinder sleeve being linked together with wheel hub, magnetic force sliding sleeve (11) set inside the impeller hub (6)
On smooth cylinder sleeve；The lower end of blade rotation valve (8) spool on the impeller hub (6) passes through connecting rod and elastic force bar
(10) one end connects, and the other end of elastic force bar (10) is connected with magnetic force sliding sleeve (11)；
The magnetic force sliding sleeve (11) can drive elastic force bar (10) with the change in the electric coil magnetic field being mounted in guide vane (7)
It horizontally slips along smooth cylinder sleeve, band movable vane piece rotation valve (8) rotation, the bucket rear (5) can rotate with blade
Valve (8) rotates clockwise or counterclockwise certain angle；
Guide vane (7) inward flange is fixedly connected with guide vane hub (12), and guide vane (7) outer edge is fixedly connected with runner inner wall.
2. the adjustable hydraulic propeller of blade-section as described in claim 1, which is characterized in that the bucket front (3)
It is 2/3~3/2 with bucket rear (5) length ratio range, blade (4) interior thickness is bigger by 1.2 than the thickness of blade (4) entrance
~1.5 times.
3. the adjustable hydraulic propeller of blade-section as described in claim 1, which is characterized in that blade (4) section
Be overlapped is 0 degree.
4. the adjustable hydraulic propeller of blade-section as described in claim 1, which is characterized in that the bucket rear (5)
The angle that valve (8) rotation can be rotated with blade is -30 °~30 °.
5. the adjustable hydraulic propeller of blade-section as described in claim 1, which is characterized in that the blade rotates valve
(8) there is finish aquadag mixed lubrication in the junction with connecting rod junction and elastic force bar (10) and connecting rod.
6. the adjustable hydraulic propeller of blade-section as described in claim 1, which is characterized in that the one of the pump shaft (2)
End is mounted on the end of impeller hub (6) and passes through hex nut by key (14) connection impeller hub (6), the bearing (13)
It is fixed.
7. the adjustable hydraulic propeller of blade-section as claimed in claim 6, which is characterized in that the bearing of the impeller
It (13) is the deep groove ball bearing of self-lubricating.
8. the adjustable hydraulic propeller of blade-section as described in claim 1, which is characterized in that further include bevel gear
(18)；The pump shaft (2) is located at the other end of water inlet flow channel (1) outside and is equipped with bevel gear (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887484.XA CN107725476B (en) | 2017-09-27 | 2017-09-27 | A kind of adjustable hydraulic propeller of blade-section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887484.XA CN107725476B (en) | 2017-09-27 | 2017-09-27 | A kind of adjustable hydraulic propeller of blade-section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107725476A CN107725476A (en) | 2018-02-23 |
| CN107725476B true CN107725476B (en) | 2019-03-05 |
Family
ID=61208109
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710887484.XA Active CN107725476B (en) | 2017-09-27 | 2017-09-27 | A kind of adjustable hydraulic propeller of blade-section |
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| CN (1) | CN107725476B (en) |
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| CN108609147B (en) * | 2018-05-18 | 2020-01-10 | 中船黄埔文冲船舶有限公司 | Ship water inlet flow channel and manufacturing and mounting method |
| CN111792012A (en) * | 2019-04-09 | 2020-10-20 | 哈尔滨智明科技有限公司 | Multistage propeller ship propulsion device |
| CN110203367A (en) * | 2019-07-19 | 2019-09-06 | 赛奎鹰智能装备(威海)有限责任公司 | Underwater propeller |
| CN110594199A (en) * | 2019-09-27 | 2019-12-20 | 大连理工大学 | A water jet propulsion pump with a variable cross-section water inlet pipeline type water inlet channel |
| CN111846176A (en) * | 2020-07-30 | 2020-10-30 | 扬州大学 | A reversible spout submerged water jet propeller and its working method |
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| CN115042948A (en) * | 2022-07-11 | 2022-09-13 | 中国船舶工业集团公司第七0八研究所 | Multi-tube electric water-jet propeller |
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| CN118167661A (en) * | 2024-03-12 | 2024-06-11 | 江苏大学流体机械温岭研究院 | Shaftless high maneuverability waterjet pump with double suction inlet |
| CN119503105A (en) * | 2024-11-20 | 2025-02-25 | 中国船舶集团有限公司第七〇八研究所 | A micro-baffle structure for reducing vibration and increasing efficiency of a water jet propulsion pump |
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| Publication number | Publication date |
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| CN107725476A (en) | 2018-02-23 |
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Address after: 212000 101 South Xu Road, run Zhou District, Zhenjiang, Jiangsu Patentee after: MARINE EQUIPMENT AND TECHNOLOGY INSTITUTE JIANGSU University OF SCIENCE AND TECHNOLOGY Patentee after: Jiangsu KaiBang Promotion Technology Co.,Ltd. Address before: 212000 101 South Xu Road, run Zhou District, Zhenjiang, Jiangsu Patentee before: MARINE EQUIPMENT AND TECHNOLOGY INSTITUTE JIANGSU University OF SCIENCE AND TECHNOLOGY Patentee before: Zhenjiang KaiBang Propulsion Technology Co.,Ltd. Address after: 212000 101 South Xu Road, run Zhou District, Zhenjiang, Jiangsu Patentee after: MARINE EQUIPMENT AND TECHNOLOGY INSTITUTE JIANGSU University OF SCIENCE AND TECHNOLOGY Patentee after: Zhenjiang KaiBang Propulsion Technology Co.,Ltd. Address before: 212000 101 South Xu Road, run Zhou District, Zhenjiang, Jiangsu Patentee before: MARINE EQUIPMENT AND TECHNOLOGY INSTITUTE JIANGSU University OF SCIENCE AND TECHNOLOGY Patentee before: ZHENJIANG CHAPPO MARINE EQUIPMENT Co.,Ltd. |
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