CN104599568B - A kind of transmission pressure wind and rain causes the analogue experiment installation that shakes - Google Patents
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Abstract
本发明公开了一种输电导线用风雨致振模拟实验装置，用于研究输电导线在风雨耦合作用下可能诱发的风雨致振现象。包括：试验台主体结构、模拟降雨装置、模拟风速系统、导线架结构和导线位置调整及测试装置。模拟降雨装置的喷头可随管道支架水平移动以与调节出风口的距离，所述设备水源来自水槽并由其侧边水泵供给。喷头模拟的降雨经过导流槽后回收到水槽，实现水循环使用。导线架设置在中间实验区域两侧，设有两级高度调节，包括支架与底座连接处的粗条螺钉和支架顶部的微调螺钉，输电导线经弹簧悬挂于导线架的矩形框中。另外，压力、位移，速度和加速度传感器分别置于输电导线的两端，用以测量气动力系数、振动位移，位移速度和加速度。
The invention discloses a wind-rain-induced vibration simulation experiment device for a power transmission wire, which is used for studying the wind-rain-induced vibration phenomenon that may be induced by the power transmission wire under the coupling action of wind and rain. Including: the main structure of the test bench, the simulated rainfall device, the simulated wind speed system, the wire frame structure and the wire position adjustment and testing device. The nozzle of the simulated rainfall device can move horizontally with the pipe support to adjust the distance from the air outlet. The water source of the equipment comes from the water tank and is supplied by its side water pump. The rainfall simulated by the nozzle passes through the diversion tank and is recycled to the water tank to realize water recycling. The lead frame is set on both sides of the middle experimental area, with two levels of height adjustment, including the thick screw at the connection between the support and the base and the fine-tuning screw on the top of the support. The power transmission wire is suspended in the rectangular frame of the lead frame by a spring. In addition, pressure, displacement, velocity and acceleration sensors are respectively placed at both ends of the transmission wire to measure the aerodynamic coefficient, vibration displacement, displacement velocity and acceleration.
Description
技术领域technical field
本发明提供一种致振模拟实验装置，特别涉及一种输电导线用风雨致振模拟实验装置。The invention provides a vibration simulation experiment device, in particular to a wind and rain vibration simulation experiment device for power transmission wires.
背景技术Background technique
随着电力工业的发展，高压、特高压输电网络逐渐规模化、智能化，这使得输电塔-线体系发生巨大变化，主要呈现塔杆高耸、导线截面粗大等问题。这使得塔线体系柔性特征愈发凸显，易受到外部载荷影响。特高压输电导线在风雨耦合的环境中，多次呈现大幅的振动现象。国内外少数学者进行了针对性的研究，发现其诱发机理可能为风雨致输电导线气动力失稳。该大幅振动现象严重威胁输电线路的安全稳定运行，为即将开建的特高压输电线路工程的一大隐患。而国内尚无针对一种输电导线的风雨致振实验的相关实验设备。因此，为揭示其诱发机理，有必要搭建输电导线用风雨致振模拟实验装置。With the development of the electric power industry, the high-voltage and ultra-high voltage transmission networks are gradually becoming large-scale and intelligent, which has caused great changes in the transmission tower-line system, mainly presenting problems such as towering towers and thick conductor cross-sections. This makes the tower line system more flexible and vulnerable to external loads. UHV transmission wires frequently exhibit large vibrations in wind and rain coupled environments. A small number of scholars at home and abroad have conducted targeted research and found that the inducing mechanism may be the aerodynamic instability of the transmission line caused by wind and rain. This large-scale vibration phenomenon seriously threatens the safe and stable operation of the transmission line, and is a major hidden danger of the upcoming UHV transmission line project. However, there is no relevant experimental equipment for the wind and rain induced vibration experiment of a transmission wire in China. Therefore, in order to reveal its induced mechanism, it is necessary to build a simulation experiment device for wind and rain induced vibration of transmission lines.
发明内容Contents of the invention
本发明的目的是提供一种模拟输电导线风雨致振实验装置。其可以模拟强风、降雨，微风有雨，中风有雨及强风有雨等多种工况。在多种工况下，通过位移传感器、压力传感器及加速度传感器等测量输电导线的面内气动力系数、振动幅值、速度及加速度，并可根据需要测量输电导线的面外振动气动力系数、振动幅值、速度及加速度。The purpose of the present invention is to provide an experimental device for simulating wind and rain vibration of transmission wires. It can simulate various working conditions such as strong wind, rainfall, light wind with rain, stroke with rain, and strong wind with rain. Under various working conditions, measure the in-plane aerodynamic coefficient, vibration amplitude, velocity and acceleration of the transmission wire through displacement sensors, pressure sensors and acceleration sensors, and measure the out-of-plane vibration aerodynamic coefficient, Vibration amplitude, velocity and acceleration.
为实现上述目的，本发明采取如下技术方案：To achieve the above object, the present invention takes the following technical solutions:
一种输电导线用风雨致振模拟实验装置，包括：A wind and rain-induced vibration simulation experiment device for transmission wires, comprising:
试验台主体结构，包括导流槽、刻度板，所述导流槽设置在试验台主体结构下端，包括边缘导流部分；所述刻度板设置在侧主板边中间部位，中部设有竖直的长条状通孔，可随导线水平旋转而在侧主板上滑动，滑动距离可由侧主板滑动副附近的刻度值读出，用以计算风偏角；The main structure of the test bench includes a diversion groove and a scale plate. The diversion groove is arranged at the lower end of the main structure of the test bench, including the edge diversion part; the scale plate is arranged in the middle of the edge of the side main board, and a vertical The strip-shaped through hole can slide on the side main board with the horizontal rotation of the wire, and the sliding distance can be read from the scale value near the sliding pair of the side main board to calculate the windage angle;
循环降雨装置，包括水泵、水槽、喷头、水管管道、降雨调节箱，所述水泵安装在试验台主体结构后方的水槽边，与水管管道以软管连接；The circulating rainfall device includes a water pump, a water tank, a nozzle, a water pipe, and a rainfall adjustment box. The water pump is installed on the side of the water tank behind the main structure of the test bench, and is connected to the water pipe with a hose;
模拟风速系统，包括风筒、风机、风速调节变频箱和风机工作台，风机固定在风机工作台上，风机工作台台面设有凹槽，用于放置风速调节变频箱和降雨调节箱；风筒与风机相连，风筒保证风的均匀性和稳定性；实验时风通过风筒吹入试验台主体结构，通过风速调节变频箱调节风速；Simulated wind speed system, including air duct, fan, wind speed adjustment frequency conversion box and fan workbench, the fan is fixed on the fan workbench, and the fan workbench table is provided with grooves for placing the wind speed adjustment frequency conversion box and rainfall adjustment box; Connected with the fan, the air duct ensures the uniformity and stability of the wind; during the experiment, the wind is blown into the main structure of the test bench through the air duct, and the wind speed is adjusted through the wind speed adjustment frequency conversion box;
导线架结构，包括底座、支架、粗调螺钉，底座与支架相连，由粗调螺钉夹紧，调整支架高度时可松开粗调螺钉，调节到位后拧紧；The lead frame structure includes a base, a bracket, and a coarse adjustment screw. The base is connected to the bracket and clamped by the coarse adjustment screw. When adjusting the height of the bracket, the coarse adjustment screw can be loosened and tightened after the adjustment is in place;
输电导线振动测试装置，设置在导线架上，与导线连接。The transmission wire vibration testing device is arranged on the wire frame and connected with the wire.
进一步，导线架设有两级高度调节，包括支架与底座连接处的粗调螺钉和支架顶部的微调螺钉；输电导线经弹簧悬挂于导线架的矩形框中。Further, the lead frame is provided with two levels of height adjustment, including a coarse adjustment screw at the connection between the bracket and the base and a fine adjustment screw at the top of the support; the power transmission wire is suspended in the rectangular frame of the lead frame through springs.
进一步，压力、位移，速度和加速度传感器分别置于输电导线的两端，用以测量气动力系数、振动位移，位移速度和加速度。Further, pressure, displacement, velocity and acceleration sensors are respectively placed at both ends of the transmission wire to measure the aerodynamic coefficient, vibration displacement, displacement velocity and acceleration.
循环降雨装置实现循环利用雨水，节约水资源，且可远离水源进行实验；模拟风速系统提供稳定的定向风；试验台主体结构可显示输电导线的横向偏角，同时保证雨水飞溅不出实验区；导线架结构为输电导线和输电导线振动测试装置提供支撑，其高度可调，可完成导线的纵向倾斜。The cyclic rainfall device realizes the recycling of rainwater, saves water resources, and can conduct experiments away from the water source; the simulated wind speed system provides stable directional wind; the main structure of the test bench can display the lateral deflection angle of the transmission wire, and at the same time ensure that the rainwater splashes out of the experimental area; The lead frame structure provides support for the transmission conductor and the transmission conductor vibration test device, and its height is adjustable to complete the longitudinal inclination of the conductor.
本发明由于采取上述技术方案，具有以下优点：The present invention has the following advantages due to the adoption of the above-mentioned technical scheme:
1.实验装置整体结构紧凑，占地面积仅7m2左右；1. The overall structure of the experimental device is compact, covering an area of only about 7m 2 ;
2.有独立的循环降雨系统，可远离水源进行实验，半封闭结构使水循环流失大大减少；2. With an independent circulating rainfall system, experiments can be carried out away from the water source, and the semi-closed structure greatly reduces the loss of water circulation;
3.流场尾部开放，防止干扰尾流影响气动力参数；3. The tail of the flow field is open to prevent the disturbing wake from affecting the aerodynamic parameters;
4.导线位置和走向在一定范围内可调整，满足不同攻角和风偏角要求；4. The position and direction of the wire can be adjusted within a certain range to meet the requirements of different attack angles and windage angles;
5.导线架设有横向振动扩展孔，可扩展同时测量横向振动。5. The lead frame is equipped with lateral vibration expansion holes, which can be expanded and measure lateral vibration at the same time.
附图说明Description of drawings
图1是输电导线用风雨致振模拟实验装置示意图；Fig. 1 is a schematic diagram of a wind and rain-induced vibration simulation experiment device for transmission wires;
图2是导线极限风偏角β位置示意图；Figure 2 is a schematic diagram of the position of the wire limit windage angle β;
图3是导线极限倾角α位置示意图；Figure 3 is a schematic diagram of the position of the limit inclination angle α of the wire;
图4是模拟风速系统的主视图；Fig. 4 is the front view of the simulated wind speed system;
图5是模拟风速系统的俯视图。Fig. 5 is a top view of the simulated wind speed system.
其中，1为风筒，2为风机，3为风速调节变频箱，4为降雨调节箱，5为风机工作台，6为导线架支架，7为弹簧，8为导线架粗调螺钉，9为导线架底座，10为降雨架，11为引水槽工作台，12为出风口板，13为进水管，14为水槽，15为入风口板，16为导线，17为GB_M5-S螺钉，18为拐角锁紧销，19侧副板，20为刻度板，21为GB_M6-S螺钉，22为侧主板，23为引水槽，24为水泵。Among them, 1 is the air duct, 2 is the fan, 3 is the wind speed adjustment frequency conversion box, 4 is the rainfall adjustment box, 5 is the fan workbench, 6 is the lead frame bracket, 7 is the spring, 8 is the coarse adjustment screw of the lead frame, 9 is The base of the lead frame, 10 is the rain frame, 11 is the workbench of the water diversion tank, 12 is the air outlet plate, 13 is the water inlet pipe, 14 is the water tank, 15 is the air inlet plate, 16 is the wire, 17 is the GB_M5-S screw, 18 is the Corner locking pin, 19 side sub-plates, 20 is a scale plate, 21 is a GB_M6-S screw, 22 is a side main board, 23 is a water diversion tank, and 24 is a water pump.
具体实施方式detailed description
结合附图对本发明各结构进行详细说明。Each structure of the present invention will be described in detail in conjunction with the accompanying drawings.
1.导线架结构：由导线架支架[6]、弹簧[7]、导线架粗调螺钉[8]、导线架底座[9]、微调节螺钉(M6-S)[21]及导线构成。导线架底座与导线架支架相连，由导线架粗调螺钉夹紧，粗调高度时可松开，调节后拧紧。导线由其上下两根弹簧拉扯至导线架矩形支架的中部，可做自由振动。高位弹簧上方通过微调节螺钉与导线架支架相连，通过旋转微调节螺钉来调整高位弹簧拉力，从而微调导线高度。1. Lead frame structure: It consists of lead frame bracket [6], spring [7], lead frame coarse adjustment screw [8], lead frame base [9], fine adjustment screw (M6-S) [21] and wires. The base of the lead frame is connected with the support of the lead frame, and is clamped by the coarse adjustment screw of the lead frame, which can be loosened when the height is roughly adjusted, and then tightened after adjustment. The wire is pulled to the middle of the rectangular support of the lead frame by its upper and lower two springs, which can be used for free vibration. The upper part of the high position spring is connected with the lead frame bracket through the micro adjustment screw, and the tension of the high position spring is adjusted by rotating the micro adjustment screw, so as to fine tune the height of the wire.
2.试验台主体结构，包括导流槽、刻度板，所述导流槽设置在试验台主体结构下端，包括边缘导流部分。刻度板中部打细长通孔，以备导线穿过，孔边有刻度，调整导线倾角时可参照读数；刻度板可随导线水平旋转而在侧主板上滑动，滑动距离可由侧主板滑动副附近的刻度值读出，用以计算风偏角。2. The main structure of the test bench includes a diversion groove and a scale plate. The diversion groove is arranged at the lower end of the main structure of the test bench, including the edge diversion part. Slender through-holes are drilled in the middle of the scale plate for wires to pass through. There are scales on the edge of the hole, and the readings can be referred to when adjusting the inclination of the wires; the scale plate can slide on the side main board with the horizontal rotation of the wires, and the sliding distance can be controlled by the side of the main board. The scale value read out is used to calculate the wind angle.
3.模拟风速系统：由风筒[1]、风机[2]、风速调节变频箱[3]和风机工作台[5]组成。风机固定在风机工作台上，工作台台面靠柜门处预留两个调速箱的凹槽，用来放置风速调节变频箱和降雨调节箱。风筒与风机相连，风筒保证风的均匀性和稳定性。实验时风通过风筒吹入实验区，风速通过调节箱调节。3. Simulated wind speed system: It is composed of air duct [1], fan [2], wind speed adjustment frequency conversion box [3] and fan workbench [5]. The fan is fixed on the fan workbench, and two grooves for the speed control box are reserved near the cabinet door on the workbench table to place the wind speed adjustment frequency conversion box and the rainfall adjustment box. The air duct is connected with the fan, and the air duct ensures the uniformity and stability of the wind. During the experiment, the wind is blown into the experimental area through the blower, and the wind speed is adjusted by the regulating box.
4.循环降雨系统：由降雨架[10]、引水槽工作台[11]、进水管[13]、水槽[14]、引水槽[23]和水泵[24]构成。降雨架上部安装有降雨所需喷头，架体中空，可直接做导管使用；其可通过软管与水泵出口相连。引水槽安装在引水槽工作台上，中部微凸出，保证降雨可顺势滑入边槽内，并从引水槽尾部的出口流出。水槽位于引水槽的尾部下方，用于承接流出引水槽的降雨并储存之，以备循环再利用。4. Circulation rainfall system: be made of rain frame [10], water diversion tank workbench [11], water inlet pipe [13], water tank [14], water diversion tank [23] and water pump [24]. The upper part of the rain rack is equipped with a sprinkler head required for rainfall. The rack body is hollow and can be directly used as a conduit; it can be connected to the outlet of the water pump through a hose. The water diversion tank is installed on the water diversion tank workbench, and the middle part is slightly protruded to ensure that the rainfall can slide into the side tank and flow out from the outlet at the end of the water diversion tank. The water tank is located under the tail of the water diversion tank, and is used to receive the rainfall flowing out of the water diversion tank and store it for recycling.
下面结合附图和对本发明实验流程进行详细说明：Below in conjunction with accompanying drawing and experiment process of the present invention are described in detail:
1.固定导线：根据附图1，导线[16]穿过两侧刻度板[20]，且两端被4根弹簧[7]固定在导线架支架[6]中部；1. Fixing wires: according to accompanying drawing 1, the wires [16] pass through the scale plates [20] on both sides, and the two ends are fixed in the middle of the wire frame bracket [6] by 4 springs [7];
2.调整导线位置：2. Adjust the wire position:
a)水平调整：移动导线架底座[9]可调整如图2所示的风偏角β，同时刻度板[20]随导线平移至合适位置固定，可在刻度板滑动副位置读出两边偏移量，从而确定β角；a) Horizontal adjustment: move the lead frame base [9] to adjust the windage angle β as shown in Figure 2, and at the same time, the scale plate [20] moves to a suitable position with the lead wire and fixes it. displacement, so as to determine the β angle;
b)高度调整：按先后次序分别调整粗调螺钉[8]和微调螺钉(M6-S)[21]调节如附图3所示导线的倾角α，其读数可根据刻度板长条状通孔的刻度读出；b) Height adjustment: Adjust the coarse adjustment screw [8] and the fine adjustment screw (M6-S) [21] in order to adjust the inclination angle α of the wire as shown in Figure 3. The scale readout;
3.调节风速：风机[2]通电后开始送风，可通过调节风机工作台[5]上的变频箱[3]改变风机[2]转速，从而改变风量及风速；3. Adjust the wind speed: After the fan [2] is powered on, it starts to send air, and the fan [2] speed can be changed by adjusting the frequency conversion box [3] on the fan workbench [5], thereby changing the air volume and wind speed;
4.调节降雨：通电后，水泵[24]开始从水槽[14]中抽水并送入降雨架[10]。调节风机工作台[5]上的降雨调节箱[4]，可改变水泵[24]的转速，从而调节降雨量。4. Regulating rainfall: After power-on, the water pump [24] starts to draw water from the water tank [14] and sends it into the rain rack [10]. Regulate the rainfall regulating box [4] on the blower fan workbench [5], can change the rotating speed of water pump [24], thereby regulate rainfall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410743206.3A CN104599568B (en) | 2014-12-08 | 2014-12-08 | A kind of transmission pressure wind and rain causes the analogue experiment installation that shakes |
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| CN104964808A (en) * | 2015-07-02 | 2015-10-07 | 华北电力大学 | Method for calculating unsteady aerodynamic coefficient of wind and rain induced vibration of power transmission line |
| CN104991147B (en) * | 2015-07-21 | 2017-10-27 | 浙江康宇电缆有限公司 | Cable testing apparatus |
| CN105068449B (en) * | 2015-08-20 | 2017-07-07 | 国网山东省电力公司烟台供电公司 | Experimental provision is waved in a kind of overhead transmission line numerical control |
| CN107121297B (en) * | 2017-06-19 | 2023-05-16 | 吉林大学 | System for simulating wind-rain coupling effect and control method |
| CN109443687B (en) * | 2018-10-30 | 2020-09-01 | 重庆大学 | Wind-induced vibration energy absorption test device capable of freely adjusting wind attack angle and wind direction angle |
| CN109443680A (en) * | 2018-12-05 | 2019-03-08 | 国网浙江省电力有限公司经济技术研究院 | A kind of transmission pressure deices vibration-testing apparatus and test method |
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| CN202720155U (en) * | 2012-08-07 | 2013-02-06 | 惠州住成电装有限公司 | Auxiliary device for wire vibration test |
| CN104050860A (en) * | 2014-05-28 | 2014-09-17 | 河海大学 | Cable rope wind and rain excitation function simulation experiment device |
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| CN202014073U (en) * | 2011-03-30 | 2011-10-19 | 河南省电力公司济源供电公司 | Vibration-reducing connecting part of overhead electric wire |
| CN203433701U (en) * | 2013-04-03 | 2014-02-12 | 华北电力大学（保定） | Closed-type conductor erosion simulation device |
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| CN202720155U (en) * | 2012-08-07 | 2013-02-06 | 惠州住成电装有限公司 | Auxiliary device for wire vibration test |
| CN104050860A (en) * | 2014-05-28 | 2014-09-17 | 河海大学 | Cable rope wind and rain excitation function simulation experiment device |
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