CN103978462B - The whole instrument of blade type intonation - Google Patents

The whole instrument of blade type intonation Download PDF

Info

Publication number
CN103978462B
CN103978462B CN201410211407.9A CN201410211407A CN103978462B CN 103978462 B CN103978462 B CN 103978462B CN 201410211407 A CN201410211407 A CN 201410211407A CN 103978462 B CN103978462 B CN 103978462B
Authority
CN
China
Prior art keywords
movable holddown
blade
adjusting lever
pressure adjusting
blade type
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.)
Active
Application number
CN201410211407.9A
Other languages
Chinese (zh)
Other versions
CN103978462A (en
Inventor
刘梅
钟如钢
周红梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AECC South Industry Co Ltd
Original Assignee
China National South Aviation Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China National South Aviation Industry Co Ltd filed Critical China National South Aviation Industry Co Ltd
Priority to CN201410211407.9A priority Critical patent/CN103978462B/en
Publication of CN103978462A publication Critical patent/CN103978462A/en
Application granted granted Critical
Publication of CN103978462B publication Critical patent/CN103978462B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B33/00Hand tools not covered by any other group in this subclass

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)

Abstract

The invention provides the whole instrument of blade type intonation, comprising: fixing briquetting; Movable holddown, movable holddown and fixing briquetting distance adjustable ground are oppositely arranged, and form the sandwiched space being used for sandwiched blade to be adjusted between movable holddown and fixing briquetting; Die cavity expression lobes, die cavity expression lobes be arranged on fixing briquetting with the two ends of the side of the two ends of the relative side of movable holddown or the relative with fixing briquetting of movable holddown.The whole instrument of blade type intonation in the present invention comprises the fixing briquetting and movable holddown that are oppositely arranged apart from adjustable ground, form sandwiched space between the two, and fixing briquetting or movable holddown are provided with die cavity expression lobes, like this, after blade being placed on this sandwiched space, the fixing distance between briquetting and movable holddown of adjustment just can realize the extruding to blade again, and then realizes the adjustment to the cavity size of blade die cavity.

Description

The whole instrument of blade type intonation
Technical field
The present invention relates to die cavity adjustment field, more specifically, relate to the whole instrument of a kind of blade type intonation.
Background technology
The required precision of turborotor is very high, and its load of bearing is very large, is the vitals on engine.The water flow simulation test that such blade carries out is an important step to engine structure design, generally all needs to adjust this blade die cavity when water flow simulation test is defective.As depicted in figs. 1 and 2, blade 1 of the prior art is made up of the blade back 3 be oppositely arranged and leaf basin 2, and forms the cavity of blade die cavity between blade back 3 and leaf basin 2.
At present, the method adjusted blade die cavity is the opening operating to tune up or turn down die cavity by craft or spanner to the carrying out of die cavity, and then makes the cavity of blade die cavity become large or diminish.
But when adopting these methods to adjust blade die cavity, not only efficiency is lower, and staff is difficult to hold to the size that die cavity adjusts, and also blade profile can be cracked because of operation undue force, add the scrappage of blade.
Present stage, the development produced along with plane grows, need to adjust large batch of blade die cavity, a kind of cavity that just can adjust blade die cavity in operation site of necessary design becomes the frock of large (opening) and diminish (pass) to improve present situation.
Summary of the invention
The present invention aims to provide the whole instrument of a kind of blade type intonation, to solve large, the inefficient problem of difficulty to die cavity adjustment of prior art.
For solving the problems of the technologies described above, the invention provides the whole instrument of a kind of blade type intonation, comprising: fixing briquetting; Movable holddown, movable holddown and fixing briquetting distance adjustable ground are oppositely arranged, and form the sandwiched space being used for sandwiched blade to be adjusted between movable holddown and fixing briquetting; Die cavity expression lobes, die cavity expression lobes be arranged on fixing briquetting with the two ends of the side of the two ends of the relative side of movable holddown or the relative with fixing briquetting of movable holddown.
Further, die cavity expression lobes extends along the width of blade.
Further, the whole instrument of blade type intonation also comprises: device for pressure measurement, and the measurement contact of device for pressure measurement is arranged between fixing briquetting and movable holddown, for measuring the power acted on blade.
Further, the whole instrument of blade type intonation also comprises: pressure regulation device, and pressure regulation device is arranged on the side away from fixing briquetting of movable holddown, and applies pressure to movable holddown.
Further, pressure regulation device comprises: support member, and support member is arranged on the side away from fixing briquetting of movable holddown, and support member is provided with the through hole vertical with the end face of movable holddown; Pressure adjusting lever, pressure adjusting lever is arranged on support member, and one end of pressure adjusting lever is connected through driving with movable holddown after through hole.
Further, pressure adjusting lever is screw rod, and is provided with the screw thread matched with screw rod in through hole, and the drive end of pressure adjusting lever is connected on movable holddown.
Further, pressure adjusting lever is screw rod, and screw rod can be rotatably set in the through hole of support member, and movable holddown is provided with the screwed hole matched with screw rod.
Further, pressure regulation device also comprises: rotary handle, and rotary handle is arranged on one end away from movable holddown of pressure adjusting lever, and the power providing the axis around pressure adjusting lever to rotate for pressure adjusting lever.
Further, through hole is provided with limited step, and pressure adjusting lever is provided with the defining flange matched with limited step.
Further, blade type chamber adjustment means also comprises: locating part, and locating part is set on pressure adjusting lever, and locating part is arranged in through hole, and defining flange is between limited step and locating part.
Further, locating part and through hole are threaded connection.
Further, the end face relative with movable holddown of support member is provided with alignment pin, and movable holddown is provided with the pilot hole matched with alignment pin.
The whole instrument of blade type intonation in the present invention comprises the fixing briquetting and movable holddown that are oppositely arranged apart from adjustable ground, form sandwiched space between the two, and fixing briquetting or movable holddown are provided with die cavity expression lobes, like this, after blade being placed on this sandwiched space, the fixing distance between briquetting and movable holddown of adjustment just can realize the extruding to blade again, and then realizes the adjustment to the cavity size of blade die cavity.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 diagrammatically illustrates the leaf basin structural representation upwards of blade of the prior art;
Fig. 2 diagrammatically illustrate the leaf basin of blade of the prior art downward in conjunction with schematic diagram;
Fig. 3 diagrammatically illustrates the structural representation of the whole instrument of blade type intonation in an embodiment in the present invention;
Fig. 4 diagrammatically illustrates the A-A sectional view in Fig. 3;
Fig. 5 diagrammatically illustrates the structural representation of the movable holddown in Fig. 3;
Fig. 6 diagrammatically illustrates the structural representation of the fixing briquetting in Fig. 3;
Fig. 7 diagrammatically illustrates the structural representation of the whole instrument of blade type intonation in another embodiment;
Fig. 8 diagrammatically illustrates the B-B sectional view in Fig. 7;
Fig. 9 diagrammatically illustrates the structural representation of the movable holddown in Fig. 7; And
Figure 10 diagrammatically illustrates the structural representation of the fixing briquetting in Fig. 7.
Reference numeral in figure: 1, blade; 2, leaf basin; 3, blade back; 10, fixing briquetting; 20, movable holddown; 21, screwed hole; 22, pilot hole; 30, die cavity expression lobes; 40, device for pressure measurement; 41, Pressure gauge; 42, chuck is shown; 43, table folder screw; 44, attachment screw; 45, connecting rod; 46, contact is measured; 50, pressure regulation device; 51, support member; 52, pressure adjusting lever; 53, through hole; 54, locating part; 55, rotary handle; 56, limited step; 57, defining flange; 58, lining; 59, packing ring; 60, blade; 70, alignment pin.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
The invention provides the whole instrument of a kind of blade type intonation, please refer to Fig. 3 to Figure 10, the whole instrument of this blade type intonation comprises: fixing briquetting 10; Movable holddown 20, movable holddown 20 and fixing briquetting 10 are oppositely arranged apart from adjustable ground, and form the sandwiched space being used for sandwiched blade 60 to be adjusted between movable holddown 20 and fixing briquetting 10; Die cavity expression lobes 30, die cavity expression lobes 30 be arranged on fixing briquetting 10 with the two ends of the side of the two ends of the relative side of movable holddown 20 or the relative with fixing briquetting 10 of movable holddown 20.
As shown in figs. 3 and 10, the whole instrument of blade type intonation in the present invention comprises the fixing briquetting 10 and movable holddown 20 that are oppositely arranged apart from adjustable ground, form sandwiched space between the two, and fixing briquetting 10 or movable holddown 20 are provided with die cavity expression lobes, like this, after blade 60 being placed on this sandwiched space, the more fixing distance between briquetting 10 and movable holddown 20 of adjustment just can realize the extruding to blade, and then realizes the adjustment to the cavity size of blade die cavity.
As shown in Figures 3 to 6, when die cavity expression lobes 30 is arranged on movable holddown 20, blade 60 is placed on by the mode that leaf basin is downward in the erection space formed between movable holddown 20 and fixing briquetting 10, by applying external force to movable holddown 20, distance between movable holddown 20 and fixing briquetting 10 is reduced, like this, the die cavity expression lobes 30 being positioned at the two ends of movable holddown 20 just can extrude the two ends of the blade back of blade 60, make blade back upwardly, and then the cavity of blade die cavity just can be made correspondingly to become large.
As shown in Figure 7 to 10, when die cavity expression lobes 30 is arranged on fixing briquetting 10, blade 60 is placed on by the mode that leaf basin is downward in the erection space formed between movable holddown 20 and fixing briquetting 10, by applying external force to movable holddown 20, distance between movable holddown 20 and fixing briquetting 10 is reduced, like this, the die cavity expression lobes 30 being positioned at the two ends of fixing briquetting 10 just can extrude the two ends of the leaf basin of blade 60, make leaf basin upwardly, and then the cavity of blade die cavity just can be made correspondingly to diminish.Now, as required multiple die cavity expression lobes 30 can be set abreast on fixing briquetting 10.
Preferably, die cavity expression lobes 30 extends along the width of blade 60.Preferably, die cavity expression lobes 30 and fixing briquetting 10 or movable holddown 20 one-body molded.
Preferably, the whole instrument of blade type intonation also comprises: device for pressure measurement 40, and the measurement contact 46 of device for pressure measurement 40 is arranged between fixing briquetting 10 and movable holddown 20, for measuring the power acted on blade 60.The present invention just can observe the power acted on blade 60 more easily by arranging device for pressure measurement 40, and the power owing to applying blade 60 of preventing is excessive and make the situation that blade 60 damages.
In this application, device for pressure measurement 40 comprises Pressure gauge 41, attachment screw 44 and connecting rod 45.As shown in Figure 3 and Figure 7, the link of Pressure gauge 41 is connected by attachment screw 44 with one end of connecting rod 45, and the other end of connecting rod 45 is connected with measurement contact 46.Preferably, device for pressure measurement also comprises table chuck 42 and table folder screw 43, table chuck 42 is fixed on movable holddown 20 or support member 51, the link of Pressure gauge 41 inserts in the connecting hole of table chuck 42, and table folder screw 43 is connected on the link of Pressure gauge 41 through the sidewall of connecting hole to realize manometric fixing.
As shown in Figures 3 to 6, when die cavity expression lobes 30 is arranged on movable holddown 20, blade 60 is placed on after between fixing briquetting 10 and movable holddown 20 by the mode that leaf basin is downward, and the measurement contact 46 of this device for pressure measurement 40 is conflicted with the blade back of blade 60.As shown in Figure 7 to 10, when die cavity expression lobes 30 is arranged on fixing briquetting 10, blade 60 is prevented after between fixing briquetting 10 and movable holddown 20 by the mode that leaf basin is downward, and the measurement contact 46 of this device for pressure measurement 40 is conflicted with the leaf basin of blade 60.
Preferably, the whole instrument of blade type intonation also comprises: pressure regulation device 50, and pressure regulation device 50 is arranged on the side away from fixing briquetting 10 of movable holddown 20, and applies pressure to movable holddown 20.Like this, just pressure can be applied to form squeezing action to blade 60 to movable holddown 20 more easily.
Preferably, pressure regulation device comprises: support member 51, and support member 51 is arranged on the side away from fixing briquetting 10 of movable holddown 20, and support member 51 is provided with the through hole 53 vertical with the end face of movable holddown 20; Pressure adjusting lever 52, pressure adjusting lever 52 is arranged on support member 51, and one end of pressure adjusting lever 52 is connected through driving with movable holddown 20 after through hole 53.Like this, just can realize the driving to movable holddown 20 more easily by operating pressure adjusting rod 52, and then just can form squeezing action to blade 60.
Preferably, pressure adjusting lever 52 is screw rod, and is provided with the screw thread matched with screw rod in through hole 53, and the drive end of pressure adjusting lever 52 is connected on movable holddown 20.Like this, because support member 51 is fixed, when rotation pressure adjusting rod 52, so, just can realize the upper and lower motion of pressure adjusting lever 52, and then the driving to movable holddown 20 can be realized.
Preferably, pressure adjusting lever 52 is screw rod, and screw rod can be rotatably set in the through hole 53 of support member 51, and movable holddown 20 is provided with the screwed hole 21 matched with screw rod.Pressure adjusting lever 52 only can rotate relative to support member 51, can not move up and down, like this, when rotation pressure adjusting rod 52, owing to being threaded connection between pressure adjusting lever 52 and movable holddown 20, so movable holddown 20 just can toward upper and lower motion under the driving effect of screw rod.
Preferably, pressure regulation device also comprises: rotary handle 55, and rotary handle 55 is arranged on one end away from movable holddown 20 of pressure adjusting lever 52, and the power providing the axis around pressure adjusting lever 52 to rotate for pressure adjusting lever 52.Like this, can make staff more easily driving pressure adjusting rod 52 rotate.
Preferably, through hole 53 is provided with limited step 56, and pressure adjusting lever 52 is provided with the defining flange 57 matched with limited step 56.Preferably, lining 58 is filled with between defining flange 57 and limited step 56.Like this, can limit the vertical position of pressure adjusting lever 52.
Preferably, blade type chamber adjustment means also comprises: locating part 54, and locating part 54 is set on pressure adjusting lever 52, and locating part 54 is arranged in through hole 53, and defining flange 57 is between limited step 56 and locating part 54.Preferably, packing ring 59 is provided with between locating part 54 and defining flange 57.Like this, by making defining flange 57 be folded between limited step 56 and locating part 54, effectively can limit the vertical position of pressure adjusting lever 52, and then movable holddown 20 can upper and lowerly be moved.
Preferably, locating part 54 and through hole 53 are threaded connection.With the locating part 54 relative inwall of the outside of locating part 54 with through hole 53 arranges screw thread, locating part 54 can be made to be arranged on more easily in through hole 53.
Preferably, the end face relative with movable holddown 20 of support member 51 is provided with alignment pin 70, and movable holddown 20 is provided with the pilot hole 22 matched with alignment pin 70.The present invention by arranging alignment pin 70 on support member 51, and the pilot hole 22 matched with alignment pin 70 is set on movable holddown 20, the end contacted with movable holddown 20 can slowing down pressure adjusting lever 52 shakes, and the stressed of movable holddown 20 is affected.
In this application, support member 51 is fixedly connected with fixing briquetting 10, and device for pressure measurement 40 is arranged on support member 51 or movable holddown 20.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. the whole instrument of blade type intonation, is characterized in that, comprising:
Fixing briquetting (10);
Movable holddown (20), described movable holddown (20) is oppositely arranged with described fixing briquetting (10) distance adjustable ground, and forms the sandwiched space being used for sandwiched blade (60) to be adjusted between described movable holddown (20) and described fixing briquetting (10);
Die cavity expression lobes (30), described die cavity expression lobes (30) be arranged on described fixing briquetting (10) with the two ends of the side of the two ends of the relative side of described movable holddown (20) or the relative with described fixing briquetting (10) of described movable holddown (20);
Device for pressure measurement (40), the measurement contact (46) of described device for pressure measurement (40) is arranged between described fixing briquetting (10) and described movable holddown (20), for measuring the power acted on described blade (60);
Pressure regulation device (50), described pressure regulation device (50) is arranged on the side away from described fixing briquetting (10) of described movable holddown (20), and applies pressure to described movable holddown (20).
2. the whole instrument of blade type intonation according to claim 1, is characterized in that, described die cavity expression lobes (30) extends along the width of described blade (60).
3. the whole instrument of blade type intonation according to claim 1, it is characterized in that, described pressure regulation device comprises:
Support member (51), described support member (51) is arranged on the side away from described fixing briquetting (10) of described movable holddown (20), and described support member (51) is provided with the through hole (53) vertical with the end face of described movable holddown (20);
Pressure adjusting lever (52), described pressure adjusting lever (52) is arranged on described support member (51), and one end of described pressure adjusting lever (52) drives with described movable holddown (20) be afterwards connected through described through hole (53).
4. the whole instrument of blade type intonation according to claim 3, it is characterized in that, described pressure adjusting lever (52) is screw rod, and in described through hole (53), being provided with the screw thread matched with described screw rod, the drive end of described pressure adjusting lever (52) is connected on described movable holddown (20).
5. the whole instrument of blade type intonation according to claim 3, it is characterized in that, described pressure adjusting lever (52) is screw rod, described screw rod can be rotatably set in the through hole (53) of described support member (51), and described movable holddown (20) is provided with the screwed hole (21) matched with described screw rod.
6. the whole instrument of blade type intonation according to claim 3, it is characterized in that, described pressure regulation device also comprises:
Rotary handle (55), described rotary handle (55) is arranged on one end away from described movable holddown (20) of described pressure adjusting lever (52), and is the power that described pressure adjusting lever (52) provides the axis around described pressure adjusting lever (52) to rotate.
7. the whole instrument of blade type intonation according to claim 3, it is characterized in that, described through hole (53) is provided with limited step (56), and described pressure adjusting lever (52) is provided with the defining flange (57) matched with described limited step (56).
8. the whole instrument of blade type intonation according to claim 7, is characterized in that, described blade type chamber adjustment means also comprises:
Locating part (54), described locating part (54) is set on described pressure adjusting lever (52), and described locating part (54) is arranged in described through hole (53), described defining flange (57) is positioned between described limited step (56) and described locating part (54).
9. the whole instrument of blade type intonation according to claim 8, is characterized in that, described locating part (54) and described through hole (53) are threaded connection.
10. the whole instrument of blade type intonation according to claim 3, it is characterized in that, the end face relative with described movable holddown (20) of described support member (51) is provided with alignment pin (70), and described movable holddown (20) is provided with the pilot hole (22) matched with described alignment pin (70).
CN201410211407.9A 2014-05-19 2014-05-19 The whole instrument of blade type intonation Active CN103978462B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410211407.9A CN103978462B (en) 2014-05-19 2014-05-19 The whole instrument of blade type intonation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410211407.9A CN103978462B (en) 2014-05-19 2014-05-19 The whole instrument of blade type intonation

Publications (2)

Publication Number Publication Date
CN103978462A CN103978462A (en) 2014-08-13
CN103978462B true CN103978462B (en) 2016-02-17

Family

ID=51270762

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410211407.9A Active CN103978462B (en) 2014-05-19 2014-05-19 The whole instrument of blade type intonation

Country Status (1)

Country Link
CN (1) CN103978462B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2100968U (en) * 1991-02-08 1992-04-08 张海生 Light pipe clamp
EP1734226A1 (en) * 2005-06-17 2006-12-20 United Technologies Corporation Tool and method for filling voids in turbine vanes and other articles
CN102888499A (en) * 2012-10-09 2013-01-23 首都航天机械公司 Adjustable internal support device for deformation control in heat treatment
CN103111877A (en) * 2012-12-28 2013-05-22 北京航鹤童科技有限公司 Stacking shaft positioning method and device of vane molded surface
CN103600318A (en) * 2013-11-21 2014-02-26 沈阳黎明航空发动机(集团)有限责任公司 Fixture for assessing strength of stator blade and mounting method implemented by fixture

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2100968U (en) * 1991-02-08 1992-04-08 张海生 Light pipe clamp
EP1734226A1 (en) * 2005-06-17 2006-12-20 United Technologies Corporation Tool and method for filling voids in turbine vanes and other articles
CN102888499A (en) * 2012-10-09 2013-01-23 首都航天机械公司 Adjustable internal support device for deformation control in heat treatment
CN103111877A (en) * 2012-12-28 2013-05-22 北京航鹤童科技有限公司 Stacking shaft positioning method and device of vane molded surface
CN103600318A (en) * 2013-11-21 2014-02-26 沈阳黎明航空发动机(集团)有限责任公司 Fixture for assessing strength of stator blade and mounting method implemented by fixture

Also Published As

Publication number Publication date
CN103978462A (en) 2014-08-13

Similar Documents

Publication Publication Date Title
CN202101829U (en) Valve airtight detection apparatus
CN110514378B (en) Vibration fatigue test device for fan blade with convex shoulder of engine
CN203069320U (en) Auxiliary tool for force sensor calibration
CN103978462B (en) The whole instrument of blade type intonation
CN103196748B (en) Comprehensive test experiment platform for orthodontic parodontium mechanical property
CN102896537A (en) Position adjustment device for machine tool fixtures
CN203698667U (en) Plane static pressure sensor plug cover
CN204831759U (en) Online check gauge of light miniature hydraulic drive relief valve
CN102259177B (en) Die exchange device for die casting machine
CN104315956A (en) Device and method for measuring height of vector nozzle of aeroengine in force bearing state
CN103085108A (en) Shading sheet stamping device and shading sheet stamping method
CN106402110A (en) Tool for pasting strain gage on aero-engine pipeline
CN104259328A (en) Device for closing in tightening nut and pipe joint module through oil press
CN203031655U (en) Draw membrane machine structure
CN105403458A (en) Tensile experiment device based on conventional triaxial apparatus and operation method therefor
CN102507318B (en) Equi-biaxial residual stress applying device
CN206399320U (en) A kind of cubing for detection and localization
CN101666602B (en) Dimension measurement device for assembly with shaft of stepless transmission
CN207188521U (en) A kind of rapid re-strike precision straightening device
CN203751231U (en) Open type squeezer
CN206696079U (en) A kind of rock shearing test tool machine
CN207636404U (en) A kind of room temperature strip-line test methods dielectric properties tester pressure fixture
CN207366207U (en) A kind of mechanism for testing
CN204422322U (en) For the simple and easy centering stationary installation of test block of concrete compression creep test
CN203636733U (en) Elevator door head gap adjusting tool

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan

Patentee after: China Hangfa South Industrial Co. Ltd.

Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan

Patentee before: China Southern Airlines Industry (Group) Co., Ltd.