CN104729826B - The jitter suppression device of stagnation pressure comb is surveyed in supersonic wind tunnel velocity field school - Google Patents
The jitter suppression device of stagnation pressure comb is surveyed in supersonic wind tunnel velocity field school Download PDFInfo
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Abstract
本发明公开了一种超声速风洞速度场校测总压排管的抖动抑制装置，包括：连接座，其其具有一轴线，并且所述连接座具有分布于该轴线上的两个连接端；支撑机构，其包括支撑套筒、支撑杆和第一弹性构件，其中，所述支撑套筒的一端连接至所述连接座，另一端具有开口，所述支撑杆套设于所述支撑套筒内，且所述支撑杆的自由端从所述开口伸出，所述第一弹性构件设置于所述支撑套筒的内部，向所述支撑杆提供平行于所述支撑套筒的长度方向且指向所述支撑套筒外侧的作用力；其中，至少四个支撑机构设置于所述连接座上，并且相对于所述轴线呈放射性分布。本发明可以有效抑制总压排管的抖动，增强总压排管测试系统的刚度，提高测试精度。
The invention discloses a vibration suppression device for calibrating and measuring the total pressure discharge pipe of a supersonic wind tunnel velocity field, comprising: a connecting seat, which has an axis, and the connecting seat has two connecting ends distributed on the axis; The support mechanism includes a support sleeve, a support rod and a first elastic member, wherein one end of the support sleeve is connected to the connecting seat, and the other end has an opening, and the support rod is sleeved on the support sleeve and the free end of the support rod protrudes from the opening, the first elastic member is arranged inside the support sleeve to provide the support rod parallel to the length direction of the support sleeve and The force directed to the outside of the support sleeve; wherein at least four support mechanisms are arranged on the connection seat and are radially distributed relative to the axis. The invention can effectively suppress the vibration of the total pressure discharge pipe, enhance the rigidity of the total pressure discharge pipe test system, and improve the test accuracy.
Description
技术领域technical field
本发明涉及风洞技术领域，尤其涉及一种超声速风洞速度场校测总压排管的抖动抑制装置，用于超声速风洞速度场校测时，有效抑制总压排管抖动，提高测试精度以及提高测试装置刚度。The invention relates to the technical field of wind tunnels, in particular to a vibration suppressing device for supersonic wind tunnel velocity field calibration and measurement of total pressure exhaust pipes, which can effectively suppress the vibration of total pressure exhaust pipes and improve test accuracy when used for supersonic wind tunnel velocity field calibration and measurement And improve the stiffness of the test device.
背景技术Background technique
超声速风洞在进行速度场调试时，由于超声速流场中的扰动在马赫锥内向后传播，超声速速度场校测需进行截面马赫数的校测。超声速马赫数的校测采用总压排管进行，总压排管多采用“十”字形。When the supersonic wind tunnel is debugging the velocity field, since the disturbance in the supersonic flow field propagates backward in the Mach cone, the calibration of the supersonic velocity field requires the calibration of the Mach number of the section. The calibration of the supersonic Mach number is carried out by the total pressure exhaust pipe, and the total pressure exhaust pipe is mostly in the shape of a "ten".
超声速风洞速度场校测时，现有技术中总压排管测试系统如图1所示，总压排管前视图见图2。总压排管7由连接杆件6连接并穿过攻角机构4，在攻角机构4后端通过电机和齿轮组3等部件对连接杆件进行连接，可以保证总压排管固定于风洞试验段5中心轴线某一截面上，同时通过驱动部件可以实现总压排管按照预定的方式进行前后移动，保证一次试验可以测量多个截面。电机再通过丝杠2连接至数据线引线管1，实现测量。When calibrating the velocity field of a supersonic wind tunnel, the total pressure exhaust pipe test system in the prior art is shown in Figure 1, and the front view of the total pressure exhaust pipe is shown in Figure 2. The total pressure exhaust pipe 7 is connected by the connecting rod 6 and passes through the angle of attack mechanism 4. At the rear end of the angle of attack mechanism 4, the connecting rod is connected by components such as the motor and the gear set 3, which can ensure that the total pressure exhaust pipe is fixed on the fan. On a certain section of the central axis of the hole test section 5, the total pressure exhaust pipe can be moved forward and backward according to a predetermined method through the driving parts at the same time, so as to ensure that multiple sections can be measured in one test. The motor is then connected to the data cable lead pipe 1 through the lead screw 2 to realize the measurement.
实际校测中，当对试验段入口附近截面马赫数进行测量时，连接杆件比较长(一般是风洞特征尺寸的2～3倍以上)。在风洞启动时，由于总压排管受到气流的冲击，总压排管抖动剧烈，连接杆件在攻角机构配合部分会发生变形，严重时会造成排架无法前后移动，测试无法进行；流场稳定时，总压排管的抖动也会对测试精度造成影响；总压排管受到气流的冲击而剧烈抖动，连接杆受到弯矩的作用。随着总压排架的前移，连接杆受到的弯矩也相应增加，剧烈时会破坏连接杆件，影响测试精度，造成试验设备损坏等。In the actual calibration and measurement, when the Mach number of the section near the entrance of the test section is measured, the connecting rod is relatively long (generally 2 to 3 times the characteristic size of the wind tunnel). When the wind tunnel is started, because the total pressure exhaust pipe is impacted by the air flow, the total pressure exhaust pipe shakes violently, and the connecting rod will be deformed at the matching part of the angle of attack mechanism. In severe cases, the bent frame cannot move forward and backward, and the test cannot be carried out; When the flow field is stable, the vibration of the total pressure exhaust pipe will also affect the test accuracy; the total pressure exhaust pipe is shaken violently by the impact of the air flow, and the connecting rod is affected by the bending moment. With the forward movement of the total pressure rack, the bending moment on the connecting rod will also increase accordingly. When it is severe, it will damage the connecting rod, affect the test accuracy, and cause damage to the test equipment.
由于以上种种困难，在本发明之前国内尚没有抑制总压排管在超声速风洞流场启动及稳定时抖动的成熟方法。Due to the above difficulties, before the present invention, there was no mature method for suppressing the vibration of the total pressure exhaust pipe when the flow field of the supersonic wind tunnel was started and stabilized.
发明内容Contents of the invention
针对上述技术问题，本发明提出了一种超声速风洞速度场校测总压排管的抖动抑制装置，可以有效抑制总压排管的抖动，增强总压排管测试系统的刚度，提高测试精度。In view of the above technical problems, the present invention proposes a vibration suppression device for calibrating and measuring the total pressure exhaust pipe by the supersonic wind tunnel velocity field, which can effectively suppress the vibration of the total pressure exhaust pipe, enhance the stiffness of the total pressure exhaust pipe test system, and improve the test accuracy .
本发明的技术方案为：Technical scheme of the present invention is:
一种超声速风洞速度场校测总压排管的抖动抑制装置，，包括：A vibration suppression device for calibrating the velocity field of a supersonic wind tunnel to measure the total pressure exhaust pipe, comprising:
连接座，其具有一轴线，并且所述连接座具有分布于该轴线上的两个连接端，一个连接端与总压排管连接，另一个连接端与从攻角机构伸出的连接杆连接；The connecting seat has an axis, and the connecting seat has two connecting ends distributed on the axis, one connecting end is connected with the total pressure discharge pipe, and the other connecting end is connected with the connecting rod protruding from the angle of attack mechanism ;
支撑机构，其包括支撑套筒、支撑杆和第一弹性构件，其中，所述支撑套筒的一端连接至所述连接座，另一端具有开口，所述支撑杆套设于所述支撑套筒内，且所述支撑杆的自由端从所述开口伸出，所述第一弹性构件设置于所述支撑套筒的内部，向所述支撑杆提供平行于所述支撑套筒的长度方向且指向所述支撑套筒外侧的作用力；The support mechanism includes a support sleeve, a support rod and a first elastic member, wherein one end of the support sleeve is connected to the connecting seat, and the other end has an opening, and the support rod is sleeved on the support sleeve and the free end of the support rod protrudes from the opening, the first elastic member is arranged inside the support sleeve to provide the support rod parallel to the length direction of the support sleeve and a force directed towards the outside of said support sleeve;
其中，所述支撑机构沿所述连接座的径向延伸，与总压排管的形状完全一致。Wherein, the supporting mechanism extends radially along the connecting seat, and is completely consistent with the shape of the total pressure exhaust pipe.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，一滚轮可转动地设置于所述自由端。Preferably, in the vibration suppressing device of the supersonic wind tunnel velocity field calibration measuring total pressure exhaust pipe, a roller is rotatably arranged at the free end.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述支撑机构还包括棘爪机构和棘齿条，所述棘爪机构设置于所述支撑套筒的内壁，所述棘爪机构包括与所述棘齿条啮合的棘爪齿，所述棘齿条设置于所述支撑杆的外壁，并且所述棘齿条机构和所述棘齿条设置成：限制所述支撑杆只做沿所述支撑套筒向外的运动。Preferably, in the shake suppression device for calibrating and measuring the total pressure exhaust pipe of the supersonic wind tunnel velocity field, the support mechanism further includes a ratchet mechanism and a ratchet rack, and the ratchet mechanism is arranged on the support sleeve The inner wall of the ratchet mechanism includes pawl teeth meshed with the ratchet bar, the ratchet bar is arranged on the outer wall of the support rod, and the ratchet mechanism and the ratchet bar are arranged as : restricting the support rod to only move outward along the support sleeve.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述棘爪机构包括第二弹性构件以及竖向设置的长条形本体，所述本体的中间部位枢接至所述支撑套筒，上端形成有所述棘爪齿，下端连接至所述第二弹性构件，所述第二弹性构件向所述下端施加使所述下端远离所述支撑杆的拉力，以使所述棘爪齿与所述棘齿条保持啮合。Preferably, in the shake suppression device for calibrating and measuring the total pressure discharge pipe of the supersonic wind tunnel velocity field, the pawl mechanism includes a second elastic member and a vertically arranged elongated body, and the middle part of the body pivotally connected to the supporting sleeve, the upper end is formed with the pawl teeth, and the lower end is connected to the second elastic member, and the second elastic member applies a pulling force to the lower end to keep the lower end away from the support rod , so that the pawl teeth remain engaged with the ratchet rack.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，至少四个支撑机构包括四个支撑机构，相对于所述轴线呈十字形分布。Preferably, in the vibration suppressing device for the supersonic wind tunnel velocity field correction and measurement of the total pressure exhaust pipe, at least four support mechanisms include four support mechanisms, which are distributed in a cross shape relative to the axis.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述支撑机构沿所述连接座的径向延伸。Preferably, in the vibration suppression device for the supersonic wind tunnel velocity field calibration and measurement of the total pressure exhaust pipe, the support mechanism extends along the radial direction of the connecting seat.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述第一弹性构件为弹簧。Preferably, in the vibration suppressing device for the supersonic wind tunnel velocity field correction measuring total pressure exhaust pipe, the first elastic member is a spring.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述第二弹性构件为弹簧。Preferably, in the vibration suppressing device of the supersonic wind tunnel velocity field calibration measuring total pressure exhaust pipe, the second elastic member is a spring.
本发明的技术效果为：Technical effect of the present invention is:
本发明可以有效抑制总压排管在超声速风洞流场启动及稳定时的抖动现象，而且抖动抑制装置可以很好的适应试验段壁板扩开角带来试验段前后截面尺寸不一致的影响；在风洞流场建立时可以实现总压排架的移动不受影响，在一次试验中对试验段多个截面进行测量。通过本发明设计的抖动抑制装置，可以有效抑制总压排管的抖动，增强总压排管测试系统的刚度，提高测试精度。The invention can effectively suppress the shaking phenomenon of the total pressure exhaust pipe when the flow field of the supersonic wind tunnel is started and stabilized, and the shaking suppression device can well adapt to the influence of the inconsistency of the front and rear cross-sectional dimensions of the test section caused by the expansion angle of the wall plate in the test section; When the wind tunnel flow field is established, the movement of the total pressure bent frame can be realized without being affected, and multiple sections of the test section can be measured in one test. The shake suppression device designed in the invention can effectively suppress the shake of the total pressure discharge pipe, enhance the rigidity of the total pressure discharge pipe test system, and improve the test accuracy.
附图说明Description of drawings
图1为现有技术中的总压排管测试系统的结构示意图。Fig. 1 is a structural schematic diagram of a total pressure exhaust pipe testing system in the prior art.
图2为现有技术中的总压排管的前视图。Fig. 2 is a front view of the total pressure exhaust pipe in the prior art.
图3为本发明所述的抖动抑制装置的结构示意图。FIG. 3 is a schematic structural diagram of the shake suppression device according to the present invention.
图4为本发明所述的试验段壁板扩开角的结构示意图。Fig. 4 is a structural schematic diagram of the expansion angle of the wall plate of the test section according to the present invention.
图5为应用本发明所述的抖动抑制装置的速度场校测系统的结构示意图。Fig. 5 is a schematic structural diagram of a velocity field calibration system applying the shake suppression device of the present invention.
图6为图3的A部局部放大图。FIG. 6 is a partially enlarged view of part A of FIG. 3 .
具体实施方式detailed description
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
请参阅图3、图4和图5，本发明提供了一种超声速风洞速度场校测总压排管的抖动抑制装置，包括：连接座9，其具有一轴线，并且所述连接座具有分布于该轴线上的两个连接端8，16；支撑机构，其包括支撑套筒11、支撑杆12和第一弹性构件10，其中，所述支撑套筒的一端连接至所述连接座，另一端具有开口，所述支撑杆套设于所述支撑套筒内，且所述支撑杆的自由端从所述开口伸出，所述第一弹性构件设置于所述支撑套筒的内部，向所述支撑杆提供平行于所述支撑套筒的长度方向且指向所述支撑套筒外侧的作用力；其中，至少四个支撑机构设置于所述连接座上，并且相对于所述轴线呈放射性分布。Please refer to Fig. 3, Fig. 4 and Fig. 5, the present invention provides a kind of vibration suppressing device of supersonic wind tunnel velocity field correction and measuring total pressure exhaust pipe, comprising: connecting seat 9, which has an axis, and said connecting seat has Two connection ends 8, 16 distributed on the axis; a support mechanism, which includes a support sleeve 11, a support rod 12 and a first elastic member 10, wherein one end of the support sleeve is connected to the connection seat, The other end has an opening, the support rod is sleeved in the support sleeve, and the free end of the support rod protrudes from the opening, the first elastic member is arranged inside the support sleeve, Provide the support rod with an active force parallel to the length direction of the support sleeve and directed to the outside of the support sleeve; wherein at least four support mechanisms are arranged on the connection seat and are arranged in a direction relative to the axis radioactivity distribution.
在一个具体实施方式中，抖动抑制装置通过四个接头与总压排管和连接杆件连接。强力弹簧可以将支撑杆撑起并保证支撑机构的末端与试验段四壁压紧，而且强力弹簧可以有效抑制总压排管的抖动。In a specific embodiment, the shaking suppression device is connected with the total pressure exhaust pipe and the connecting rod through four joints. The strong spring can prop up the support rod and ensure that the end of the support mechanism is pressed against the four walls of the test section, and the strong spring can effectively restrain the vibration of the total pressure exhaust pipe.
超声速风洞试验段壁板有一定的扩开角(见图4)，顺着气流方向试验段壁板相对距离逐渐增大。随着总压排管的移动，抖动抑制装置也可沿着试验段壁板移动，支撑机构的长度在第一弹性构件的作用下伸长，从而为总压排管提供支撑，抑制总压排管的抖动。本发明的抖动抑制装置可以很好的适应试验段壁板扩开角带来试验段顺气流方向截面尺寸不一致的影响。The wall panels in the supersonic wind tunnel test section have a certain opening angle (see Figure 4), and the relative distance between the wall panels in the test section gradually increases along the airflow direction. With the movement of the total pressure discharge pipe, the vibration suppression device can also move along the wall plate of the test section, and the length of the support mechanism is extended under the action of the first elastic member, thereby providing support for the total pressure discharge pipe and suppressing the total pressure discharge pipe. Vibration of the tube. The vibration suppression device of the present invention can well adapt to the influence of the inconsistency of cross-sectional dimensions of the test section along the airflow direction caused by the expansion angle of the wall plate of the test section.
本发明的抖动抑制装置安装在总压排管后端，超声速风洞试验时，抖动抑制装置不会影响其前端的流场，不会影响速度场校测的测试精度。抖动抑制装置速度场校测系统结构图见图5。The jitter suppression device of the present invention is installed at the rear end of the total pressure discharge pipe. During supersonic wind tunnel tests, the jitter suppression device will not affect the flow field at the front end, and will not affect the test accuracy of the velocity field calibration. See Figure 5 for the structural diagram of the velocity field calibration and measurement system of the shake suppression device.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，一滚轮15可转动地设置于所述自由端。优选地，滚轮采用橡胶轮。滚轮可以保证抖动抑制装置容易沿试验段移动，而不大幅增加测试装置驱动力，同时滚轮可以避免抖动抑制装置在移动过程中划伤试验段壁板。Preferably, in the vibration suppressing device of the supersonic wind tunnel velocity field calibration measuring total pressure exhaust pipe, a roller 15 is rotatably arranged at the free end. Preferably, the rollers are rubber wheels. The rollers can ensure that the vibration suppression device can easily move along the test section without greatly increasing the driving force of the test device. At the same time, the rollers can prevent the vibration suppression device from scratching the wall of the test section during the movement.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述支撑机构还包括棘爪机构13和棘齿条14，所述棘爪机构13设置于所述支撑套筒11的内壁，所述棘爪机构包括与所述棘齿条14啮合的棘爪齿17，所述棘齿条14设置于所述支撑杆12的外壁，并且所述棘齿条机构和所述棘齿条设置成：限制所述支撑杆只做沿所述支撑套筒向外的运动。棘爪机构和棘齿条可以控制支撑杆的单向运动，进一步防止总压排管的大幅度抖动。Preferably, in the shake suppression device for calibrating and measuring the total pressure exhaust pipe of the supersonic wind tunnel velocity field, the support mechanism further includes a ratchet mechanism 13 and a ratchet rack 14, and the ratchet mechanism 13 is arranged on the The inner wall of the support sleeve 11, the ratchet mechanism includes a ratchet tooth 17 engaged with the ratchet bar 14, the ratchet bar 14 is arranged on the outer wall of the support rod 12, and the ratchet rack mechanism And the ratchet bar is configured to: limit the support rod to only move outward along the support sleeve. The ratchet mechanism and the ratchet rack can control the one-way movement of the support rod, further preventing the large vibration of the total pressure exhaust pipe.
请参阅图6，具体地，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述棘爪机构包括第二弹性构件19以及竖向设置的长条形本体，所述本体的中间部位18枢接至所述支撑套筒11，上端形成有所述棘爪齿17，下端连接至所述第二弹性构件19，所述第二弹性构件向所述下端施加使所述下端远离所述支撑杆的拉力，以使所述棘爪齿17与所述棘齿条14保持啮合。当支撑机构变长时，即支撑杆向外运动，棘齿条相对于棘爪机构向外运动，在第二弹性构件的作用下，棘爪齿将始终保持与棘齿条啮合的状态。第二弹性构件优选设置成相对于支撑杆的径向延伸。Please refer to FIG. 6 , specifically, in the vibration suppression device for the supersonic wind tunnel velocity field correction and measurement of the total pressure discharge pipe, the pawl mechanism includes a second elastic member 19 and a vertically arranged elongated body, so The middle portion 18 of the body is pivotally connected to the supporting sleeve 11, the pawl teeth 17 are formed on the upper end, and the lower end is connected to the second elastic member 19, and the second elastic member applies to the lower end so that the The lower end is far away from the pulling force of the support rod, so that the pawl tooth 17 is kept engaged with the ratchet bar 14 . When the support mechanism becomes longer, that is, the support rod moves outward, the ratchet bar moves outward relative to the ratchet mechanism, and under the action of the second elastic member, the ratchet teeth will always maintain the state of meshing with the ratchet bar. The second elastic member is preferably arranged to extend radially relative to the support rod.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，至少四个支撑机构包括四个支撑机构，相对于所述轴线呈十字形分布。防抖装置呈“十”字形布置，可以保证总压排管在风洞试验中始终处于测量截面中心。Preferably, in the vibration suppressing device for the supersonic wind tunnel velocity field correction and measurement of the total pressure exhaust pipe, at least four support mechanisms include four support mechanisms, which are distributed in a cross shape relative to the axis. The anti-shake device is arranged in a "ten" shape, which can ensure that the total pressure exhaust pipe is always in the center of the measurement section in the wind tunnel test.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述支撑机构沿所述连接座的径向延伸，即与总压排管的形状完全一致。Preferably, in the vibration suppression device for the supersonic wind tunnel velocity field calibration and measurement of the total pressure discharge pipe, the support mechanism extends radially of the connecting seat, that is, it is completely consistent with the shape of the total pressure discharge pipe.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述第一弹性构件为弹簧。Preferably, in the vibration suppressing device for the supersonic wind tunnel velocity field correction measuring total pressure exhaust pipe, the first elastic member is a spring.
优选的是，所述的超声速风洞速度场校测总压排管的抖动抑制装置中，所述第二弹性构件为弹簧。Preferably, in the vibration suppressing device of the supersonic wind tunnel velocity field calibration measuring total pressure exhaust pipe, the second elastic member is a spring.
本发明虽然以较佳实施例公开如上，但其并不是用来限定本发明，任何本领域技术人员在不脱离本发明的精神和范围内，都可以做出可能的变动和修改，因此，本发明的保护范围应当以本发明权利要求所界定的范围为准。Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The protection scope of the invention shall be defined by the claims of the present invention.
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| CN109580161B (en) * | 2018-11-29 | 2020-09-18 | 中国航天空气动力技术研究院 | Low-turbulence anti-smashing device applied to ventilation model internal resistance measurement |
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| CN115628874B (en) * | 2022-12-20 | 2023-03-10 | 中国空气动力研究与发展中心超高速空气动力研究所 | Hypersonic wind tunnel closed test section model supporting device |
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