CN108534984A - A kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances - Google Patents
A kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances Download PDFInfo
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- CN108534984A CN108534984A CN201810759106.8A CN201810759106A CN108534984A CN 108534984 A CN108534984 A CN 108534984A CN 201810759106 A CN201810759106 A CN 201810759106A CN 108534984 A CN108534984 A CN 108534984A
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- horizontal stretcher
- wind
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- arm
- force balance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances.It is disposed with steel diaphragm on the wind-tunnel turntable of building wind-tunnel, is connected by steel screw rod between steel diaphragm and wind-tunnel turntable, left horizontal stretcher force balance, tower body supporting block and right horizontal stretcher force balance is sequentially installed on steel diaphragm, three top surface is located in approximately the same plane；Rectangle frid is opened in centre to be supported on wind-tunnel turntable, the above three is placed in rectangular slot, and with the top surface of round wood plate is located in approximately the same plane；Left and right cross-arm test specimen is separately mounted on respective cross-arm force balance, cross-arm tower body test specimen is mounted in tower body supporting block.The test of power transmission tower cross-arm Shape Coefficient under different incoming wind directions in building wind-tunnel may be implemented in the present invention, the accurate aerodynamic interference considered between left horizontal stretcher, cross-arm connection tower body and right horizontal stretcher, the Shape Coefficient and angle wind distribution coefficient, the wind force proofing design for power transmission tower cross-arm that power transmission tower cross-arm can be obtained provide foundation.
Description
Technical field
The present invention relates to the test devices of wind load, more particularly, to a kind of power transmission tower cross-arm build system based on double balances
Number air tunnel testing device.
Background technology
With the high speed development of electric system, overhead transmission line is built on a large scale.Cross-arm is the one of power transmission tower
A important component for installing insulator and gold utensil with supporting power transmission conducting wire and ground wire, and makes transmission pressure and power transmission tower
Keep certain safe distance.Cross-arm is usually made of many root rod pieces, and build complexity is various, and wind load is the main control of cross-arm
One of load processed, the accurate Shape Coefficient for obtaining power transmission tower cross-arm have very important significance to cross-arm wind force proofing design.Due to
The Shape Coefficient of cross-arm by influences such as the shape of rod piece, the size of rod piece and the aerodynamic interferences that connects with cross-arm tower body, with
Toward the whole Shape Coefficient of experiment usually test left horizontal stretcher, cross-arm connection tower body, right horizontal stretcher, left horizontal stretcher and the right side cannot be individually provided
The Shape Coefficient of cross-arm.And the cross-arm Shape Coefficient provided in power transmission tower design specification only has a type, can not distinguish not
The Shape Coefficient of similar shape cross-arm, it is not fine enough to the Shape Coefficient regulation of different shape cross-arm.
The Shape Coefficient of power transmission tower cross-arm is influenced by itself shape, tower body aerodynamic interference and incoming wind direction, wind-tunnel
Experiment can have good reproducibility, simultaneously taking human as wind fields conditions such as wind direction, the wind speed of control incoming to wind field residing for material object
The cross-arm that can simulate different shape and size and its connection tower body are made using scaled model.Therefore exploitation is highly desirable to be based on
The power transmission tower cross-arm Shape Coefficient air tunnel testing device of double balances individually tests the Shape Coefficient of left horizontal stretcher and right horizontal stretcher, accurately
The Shape Coefficient for providing power transmission tower cross-arm, the wind force proofing design for power transmission tower cross-arm provide foundation.
Invention content
The purpose of the present invention is to provide a kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances, can
Directly obtain left and right two cross-arms in the case that different cross-arm forms, different wind angle and and different tower bodies wind load and body
Type coefficient, the wind force proofing design for power transmission tower and cross-arm provide foundation.
The technical solution adopted by the present invention to solve the technical problems is：
Steel diaphragm is arranged on the wind-tunnel turntable of building wind-tunnel in the present invention, is connected by more steel screw rods between steel diaphragm and wind-tunnel turntable
It connects, is sequentially installed with left horizontal stretcher force balance, tower body supporting block and right horizontal stretcher force balance, Zuo Heng from left to right on steel diaphragm
The top surface for carrying on a shoulder pole force balance, tower body supporting block and right horizontal stretcher force balance is kept in the same plane；Centre is provided with rectangular
The round wood plate of shape slot is supported on by more rods on wind-tunnel turntable, and left horizontal stretcher force balance, tower body supporting block and right horizontal stretcher are surveyed
Power balance is positioned in rectangular slot, the top surface of round wood plate and left horizontal stretcher force balance, tower body supporting block and right horizontal stretcher dynamometry day
Flat top surface is kept in the same plane；Left horizontal stretcher test specimen is mounted on left horizontal stretcher force balance, by cross-arm tower body test specimen
In tower body supporting block, right horizontal stretcher test specimen is mounted on right horizontal stretcher force balance；By testing left horizontal stretcher force balance
The Shape Coefficient for obtaining left horizontal stretcher test specimen obtains the Shape Coefficient of right horizontal stretcher test specimen by testing right horizontal stretcher force balance.
The component of the left horizontal stretcher test specimen, cross-arm tower body test specimen and right horizontal stretcher test specimen is angle steel, round steel or angle steel and round steel
Combination.
The round wood plate will be more than the viscous layer thickness of wind-tunnel at a distance from wind-tunnel turntable, that is, should be greater than 15cm.
The invention has the advantages that：
The test of power transmission tower cross-arm Shape Coefficient under different incoming wind directions in building wind-tunnel may be implemented in the present invention, and directly test is left
The Shape Coefficient of cross-arm and right horizontal stretcher accurately considers the aerodynamic interference between left horizontal stretcher, cross-arm connection tower body and right horizontal stretcher, can be with
The Shape Coefficient and angle wind distribution coefficient, the wind force proofing design for power transmission tower cross-arm for obtaining power transmission tower cross-arm provide foundation.
Description of the drawings
Fig. 1 is the test device schematic diagram of the present invention.
In figure：1, wind-tunnel is built, 2, wind-tunnel turntable, 3, steel diaphragm, 4, steel screw rod, 5, left horizontal stretcher force balance, 6, tower body
Supporting block, 7, right horizontal stretcher force balance, 8, rectangular slot, 9, round wood plate, 10, rod, 11, left horizontal stretcher test specimen, 12, cross-arm tower body
Test specimen, 13, right horizontal stretcher test specimen.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1, the present invention is that steel diaphragm 3 is arranged on the wind-tunnel turntable 2 of building wind-tunnel 1, steel diaphragm 3 turns with wind-tunnel
It is connected by four steel screw rods 4 between disk 2, is sequentially installed with left horizontal stretcher force balance 5, tower body branch from left to right on steel diaphragm 3
The top surface of bracer 6 and right horizontal stretcher force balance 7, left horizontal stretcher force balance 5, tower body supporting block 6 and right horizontal stretcher force balance 7 is kept
In the same plane；The round wood plate 9 that centre is opened to rectangular slot 8 is supported on by four rods 10 on wind-tunnel turntable 2, Zuo Heng
Load force balance 5, tower body supporting block 6 and right horizontal stretcher force balance 7 are positioned in rectangular slot 8, the top surface of round wood plate 9 and left cross
The top surface for carrying on a shoulder pole force balance 5, tower body supporting block 6 and right horizontal stretcher force balance 7 is kept in the same plane；By left horizontal stretcher test specimen
11 are mounted on left horizontal stretcher force balance 5, cross-arm tower body test specimen 12 are mounted in tower body supporting block 6, by right horizontal stretcher test specimen 13
On right horizontal stretcher force balance 7；The Shape Coefficient of left horizontal stretcher test specimen 11 is obtained by testing left horizontal stretcher force balance 5, is led to
Cross the Shape Coefficient that test right horizontal stretcher force balance 7 obtains right horizontal stretcher test specimen 13.By rotating wind-tunnel turntable 2, can test not
With the Shape Coefficient of the Shape Coefficient and right horizontal stretcher test specimen 13 of the left horizontal stretcher test specimen 11 under incoming wind angle, by different incoming wind directions
The Shape Coefficient of left horizontal stretcher test specimen 11 under angle and the Shape Coefficient of right horizontal stretcher test specimen 13 are divided by with Shape Coefficient just windward, can
To obtain angle wind distribution coefficient.
Left horizontal stretcher test specimen 11 and right horizontal stretcher test specimen 13 are for the power transmission tower segment with double cross-arms, for the defeated of single cross-arm
Pylon segment is also suitable, as long as single cross-arm is mounted on the force balance of side.
The component of the left horizontal stretcher test specimen 11, cross-arm tower body test specimen 12 and right horizontal stretcher test specimen 13 is angle steel, round steel or angle steel
With the combination of round steel.
The round wood plate 9 will be more than the viscous layer thickness of wind-tunnel at a distance from wind-tunnel turntable 2, that is, should be greater than 15cm.
Embodiment：
Now illustrate the application method of the present apparatus by taking certain flow tunnel testing device and experiment process as an example.
As shown in Figure 1, experiment process is as follows：
1) it is built in Zhejiang University ZD-1 and is disposed with steel diaphragm 3,3 size of steel diaphragm on the wind-tunnel turntable 2 of the 3.5m diameters of wind-tunnel 1
Length, width and height size is respectively 60cm × 10cm × 1cm, is 5cm from wind-tunnel distance from bottom, and steel diaphragm 3 passes through four with wind-tunnel turntable 2
Root steel screw rod 4 connects, a diameter of 1cm of steel screw rod, and being installed by left, center, right sequence on steel diaphragm 3 is had by the dynamic electronics of Yangzhou section
Six component left horizontal stretcher force balance 5 of KD46040 types, tower body supporting block 6 and the right horizontal stretcher KD46040 types for limiting responsible company's production are surveyed
Power balance 7, installation requirement left horizontal stretcher KD46040 types force balance 5, tower body supporting block 6 and right horizontal stretcher KD46040 type force balances
7 top surface is maintained at approximately the same plane.
2) round wood plate 9 that a centre is opened to rectangular slot 8 is supported on by four rods 10 on wind-tunnel turntable 2, round log
The length and width size of a diameter of 1.5m of plate 9, rectangular slot 8 are respectively 80cm × 12cm, installation requirement left horizontal stretcher KD46040 types
Force balance 5, tower body supporting block 6 and right horizontal stretcher KD46040 types force balance 7 are positioned in rectangular slot 8, installation requirement round log
The top surface of plate 9 and the top surface of left horizontal stretcher force balance 5, tower body supporting block 6 and right horizontal stretcher force balance 7 are maintained at same flat
Face, round wood plate 9 are 20cm at a distance from wind-tunnel turntable 2, are more than the viscous layer thickness of wind-tunnel.
3) it is 60cm to make left horizontal stretcher test specimen 11, cross-arm connection tower body test specimen 12 and right horizontal stretcher test specimen 11, test specimen total length,
Rod piece is formed using the round bar part of 0.3cm to 1cm, left horizontal stretcher test specimen 11 is mounted on left horizontal stretcher force balance 5, by cross-arm tower
Body test specimen 12 is mounted in tower body supporting block 6, right horizontal stretcher test specimen 13 is mounted on right horizontal stretcher force balance 7, cross-arm test specimen is
Double cross-arm power transmission towers segment, component are round steel.The build system of left horizontal stretcher test specimen 11 is obtained by testing left horizontal stretcher force balance 5
Number obtains the Shape Coefficient of right horizontal stretcher test specimen 13 by testing right horizontal stretcher force balance 7.By the above process, round steel is realized
The synchronism detection of the double cross-arm Shape Coefficients of pipe.
4) by rotating wind-tunnel turntable 2, the Shape Coefficient of the left horizontal stretcher test specimen 11 under different incoming wind angles can be tested
With the Shape Coefficient of right horizontal stretcher test specimen 13, wind angle takes 5 ° as an interval, considers the twin shaft symmetry of cross-arm, wind angle test
Ranging from 0 ° ~ 90 °, test wind angle is 19, by the Shape Coefficient of the left horizontal stretcher test specimen 11 under different incoming wind angles and the right side
The Shape Coefficient of cross-arm test specimen 13 with just windward（That is 0 ° of wind angle）Shape Coefficient be divided by, can obtain angle wind distribution system
Number.
Above-mentioned specific implementation mode is used for illustrating the present invention, rather than limits the invention, in the spirit of the present invention
In claims, to any modifications and changes that the present invention makes, protection scope of the present invention is both fallen within.
Claims (3)
1. a kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances, it is characterised in that：In building wind-tunnel (1)
Wind-tunnel turntable (2) on setting steel diaphragm (3), connect by more steel screw rods (4) between steel diaphragm (3) and wind-tunnel turntable (2),
Left horizontal stretcher force balance (5), tower body supporting block (6) and right horizontal stretcher force balance are sequentially installed on steel diaphragm (3) from left to right
(7), the top surface of left horizontal stretcher force balance (5), tower body supporting block (6) and right horizontal stretcher force balance (7) is maintained at approximately the same plane
On；The round wood plate (9) that centre is opened to rectangular slot (8) is supported on by more rods (10) on wind-tunnel turntable (2), and left horizontal stretcher is surveyed
Power balance (5), tower body supporting block (6) and right horizontal stretcher force balance (7) are positioned in rectangular slot (8), the top surface of round wood plate (9)
It is kept in the same plane with the top surface of left horizontal stretcher force balance (5), tower body supporting block (6) and right horizontal stretcher force balance (7)；
Left horizontal stretcher test specimen (11) is mounted on left horizontal stretcher force balance (5), cross-arm tower body test specimen (12) is mounted on tower body supporting block
(6) on, right horizontal stretcher test specimen (13) is mounted on right horizontal stretcher force balance (7)；It is obtained by testing left horizontal stretcher force balance (5)
The Shape Coefficient of left horizontal stretcher test specimen (11) obtains the build system of right horizontal stretcher test specimen (13) by testing right horizontal stretcher force balance (7)
Number.
2. a kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances according to claim 1, special
Sign is：The component of the left horizontal stretcher test specimen (11), cross-arm tower body test specimen (12) and right horizontal stretcher test specimen (13) be angle steel, round steel or
The combination of angle steel and round steel.
3. a kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances according to claim 1, special
Sign is：The round wood plate (9) will be more than the viscous layer thickness of wind-tunnel at a distance from wind-tunnel turntable (2), that is, should be greater than 15cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810759106.8A CN108534984A (en) | 2018-07-11 | 2018-07-11 | A kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810759106.8A CN108534984A (en) | 2018-07-11 | 2018-07-11 | A kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances |
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| Publication Number | Publication Date |
|---|---|
| CN108534984A true CN108534984A (en) | 2018-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810759106.8A Withdrawn CN108534984A (en) | 2018-07-11 | 2018-07-11 | A kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470445A (en) * | 2018-12-24 | 2019-03-15 | 浙江大学 | A kind of freely-supported type air tunnel testing device for growing thin component resistance coefficient |
| CN110487504A (en) * | 2019-07-24 | 2019-11-22 | 浙江大学 | Consider the shelter bridge wind load air tunnel testing device of bridge floor and water surface distance |
| CN112903234A (en) * | 2021-01-11 | 2021-06-04 | 宁波市电力设计院有限公司 | Wind load test device of local pole system of power transmission tower structure |
| CN113155406A (en) * | 2021-02-04 | 2021-07-23 | 宁波市电力设计院有限公司 | Method for determining wind load body type coefficient of rod member of power transmission tower structure |
| CN113280997A (en) * | 2021-05-20 | 2021-08-20 | 中国能源建设集团江苏省电力设计院有限公司 | Wind tunnel testing device and method for aerodynamic coefficient of cross arm and connecting tower body of cross arm |
-
2018
- 2018-07-11 CN CN201810759106.8A patent/CN108534984A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470445A (en) * | 2018-12-24 | 2019-03-15 | 浙江大学 | A kind of freely-supported type air tunnel testing device for growing thin component resistance coefficient |
| CN110487504A (en) * | 2019-07-24 | 2019-11-22 | 浙江大学 | Consider the shelter bridge wind load air tunnel testing device of bridge floor and water surface distance |
| CN112903234A (en) * | 2021-01-11 | 2021-06-04 | 宁波市电力设计院有限公司 | Wind load test device of local pole system of power transmission tower structure |
| CN112903234B (en) * | 2021-01-11 | 2023-10-20 | 宁波市电力设计院有限公司 | Wind load test device of local pole system of transmission tower structure |
| CN113155406A (en) * | 2021-02-04 | 2021-07-23 | 宁波市电力设计院有限公司 | Method for determining wind load body type coefficient of rod member of power transmission tower structure |
| CN113280997A (en) * | 2021-05-20 | 2021-08-20 | 中国能源建设集团江苏省电力设计院有限公司 | Wind tunnel testing device and method for aerodynamic coefficient of cross arm and connecting tower body of cross arm |
| CN113280997B (en) * | 2021-05-20 | 2022-06-10 | 中国能源建设集团江苏省电力设计院有限公司 | Wind tunnel testing device and method for aerodynamic coefficient of cross arm and connecting tower body of cross arm |
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Application publication date: 20180914 |
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