A measuring method for a wind tunnel honeycomb installation

Abstract

The application provides a kind of wind tunnel honeycomb installation measurement method, comprising: the installation section of honeycomb is lofted on the inner wall of hole body and is marked;Electronic theodolite is erected, and two points are swept out on the top of hole body and are marked as two first mark points;Between two first mark points, steel wire is set, and two lead sinkers are arranged on the steel wire;The first honeycomb module at the middle position of the first layer is installed, and after adjustment, it is fixed on the hole body;Symmetrically install the second honeycomb module at the opposite sides of the first honeycomb module, and adjust;Second honeycomb module is fixed;Insert the probe into honeycomb tube;The pitch angle deviation of each point is measured;Install the honeycomb module of other layers;Electronic theodolite is erected, and measurement point is randomly selected, and base is made to be in contact with the end surface of honeycomb by precision depth gauge;The degree of precision depth gauge is measured, and the deviation of each measurement point is evaluated.The method solves the problem that it is difficult to determine the central axis due to the deformation of the hole body during assembly welding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind tunnels, in particular to a measurement method for installing a honeycomb device in a wind tunnel. BACKGROUND

[0002] A wind tunnel refers to an equipment for performing various aerodynamic tests according to the principles of relativity and similarity by using a power device to drive a controllable airflow in a pipeline system designed according to certain requirements. In order to ensure the uniformity of airflow in the test section of the tunnel and reduce the turbulence degree, a honeycomb device is arranged in the stable section of the wind tunnel to divide large vortexes of the airflow, thereby reducing the turbulence degree of the airflow. Since the honeycomb device cannot be manufactured integrally due to the large cross section of the tunnel, the entire cross section needs to be divided into multiple unit modules. Therefore, ensuring the installation precision of the multiple modules and effectively detecting the installation precision are the key to the overall installation quality of the honeycomb device. SUMMARY

[0003] The present application provides a measurement method for installing a honeycomb device in a wind tunnel, aiming to solve the problem of inaccurate installation of the honeycomb device in the existing wind tunnel.

[0004] The technical solution of the present application is as follows:

[0005] A measurement method for installing a honeycomb device in a wind tunnel, comprising the following steps:

[0006] S1. Finding the center axis of the tunnel body of the wind tunnel based on the center axis of the inlet of the stable section and the center axis of the outlet of the contraction section of the wind tunnel, erecting an electronic theodolite at a position close to the installation position of the honeycomb device based on the center axis of the tunnel body, laying out the installation section of the honeycomb device on the inner wall of the tunnel body by rotating the electronic theodolite by 90°, and marking on the inner peripheral wall of the tunnel body so that the installation section of the honeycomb device is perpendicular to the center axis of the tunnel body;

[0007] S2. Erecting the electronic theodolite at a position with a distance x from the air outlet side of the honeycomb device, and scanning two points on the top of the tunnel body and marking them as two first mark points; laying a steel wire between the two first mark points, and setting two lead sinkers on the steel wire according to the distribution of the honeycomb modules;

[0008] S3. Installing the first honeycomb module at the middle position of the first layer according to the number of the honeycomb modules, and preliminarily positioning the first honeycomb module based on the two first mark points on the tunnel body; arbitrarily selecting multiple points and measuring the actual value of the distance from the end face of the first honeycomb module to the steel wire by using a protractor, and adjusting the position of the first honeycomb module according to the deviation between the actual value and the value x;

[0009] S4. Fixing the first honeycomb module on the tunnel body;

[0010] S5, symmetrically installing the second honeycomb modules at opposite sides of the first honeycomb module, and adjusting the positions of the two second honeycomb modules by the method in step S3; fixing the contact surface of the second honeycomb module with the hole body, and fixing the contact surface of the second honeycomb module with the first honeycomb module by a fixing clamp;

[0011] S6, after the installation of the honeycomb modules on the first layer is completed, randomly selecting multiple honeycomb tubes from the honeycomb modules on the first layer and inserting a detection rod into the honeycomb tubes; randomly measuring the pitch angle deviation of each point where the multiple honeycomb tubes are located by using an angle gauge, and comprehensively evaluating the perpendicularity between the cross section formed by the multiple honeycomb tubes and the central axis of the hole body;

[0012] S7, installing the honeycomb modules of other layers from bottom to top by the same method as in steps S3 to S6;

[0013] S8, after the installation of the entire honeycomb is completed, performing overall detection of the multiple honeycomb modules by the steel wire method and the detection rod angle gauge method in steps S1 to S6, so that the perpendicularity and flatness of the formed cross section meet the design requirements;

[0014] S9, erecting the electronic theodolite at the air outlet side of the honeycomb with the central axis of the hole body as the reference and rotating it by 90°, randomly selecting measurement points at each honeycomb module, and making the base of a precision depth gauge fit the end surface of the honeycomb by the precision depth gauge; measuring the degree of the precision depth gauge by the electronic theodolite, and evaluating the deviation of each measurement point, so that the installation accuracy of the honeycomb meets the design requirements.

[0015] As a technical solution of the present application, in step S4, the first honeycomb module is fixed on the hole body by screws or spot welding.

[0016] As a technical solution of the present application, in step S5, the fixing clamp includes a G-type clamp.

[0017] As a technical solution of the present application, in step S6, the detection rod includes a hexagonal detection rod.

[0018] The beneficial effects of the present application are as follows:

[0019] The application provides a measurement method for wind tunnel honeycomb installation, which adopts a local first and overall second installation method, a lower first and upper second installation method and a middle first and two sides second installation method, and controls the final installation precision through a plurality of verification methods such as a steel wire method, a detection rod method and theodolite distance measurement method. Meanwhile, the installation method adopts a local first and overall second installation method, and controls key technical indexes such as the pitch angle, the yaw angle, the end face flatness and the perpendicularity of a single honeycomb module through theodolites, depth gauges, lead sinkers, steel wires, angle gauges and detection rods, so as to effectively ensure the installation quality of the honeycomb. In addition, the center axis of the tunnel body is determined by taking the center of the outlet of the stable section and the contraction section as a reference, so that the problem of difficulty in determining the center axis of the tunnel body due to the deformation caused by assembly welding is solved. Moreover, the method takes the re-determined center axis of the tunnel body as a reference, uses an electronic theodolite to determine the installation position of the honeycomb and monitor the position, so that the installation position is more accurate, and the measurement method is diversified. Furthermore, the method adopts a local first and overall second idea in the installation process and after installation, and uses the steel wire method, the detection rod theodolite method and the precise depth gauge plus electronic theodolite method to gradually monitor, so that the whole installation quality is monitored through multiple angles and multiple methods, and the final installation precision is effectively ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 A honeycomb installation schematic diagram provided for the embodiments of the application;

[0022] Figure 2 A steel wire method test schematic diagram provided for the embodiments of the application;

[0023] Figure 3 A detection rod and steel wire method measurement schematic diagram provided for the embodiments of the application;

[0024] Figure 4 A theodolite measurement method provided for the embodiments of the application.

[0025] Figure legend: 1-steel wire; 2-honeycomb module; 3-lead sinker; 4-angle gauge; 5-honeycomb pipe; 6-detection rod; 7-angle ruler; 8-depth gauge; 9-electronic theodolite. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0028] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0030] In addition, in the present application, unless otherwise explicitly specified and limited, the first feature above or below the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Embodiments:

[0034] Please refer to Figure 1 , combined with reference Figures 2 to 4 , the present application provides a kind of measurement method for installing wind tunnel honeycomb, it mainly includes the following steps:

[0035] S1, with the center axis of the stable section entrance of wind tunnel and the center axis of the outlet of contraction section as reference, find out the center axis of wind tunnel body, with the center axis of hole body as reference, erect electronic theodolite 9 at the installation position close to honeycomb, the installation section of honeycomb is lofted on the inner wall of hole body using the angle 90 ° of electronic theodolite 9, and is marked on the inner circumferential wall of hole body, so that the installation section of honeycomb is perpendicular to the center axis of hole body;

[0036] S2, erect electronic theodolite 9 at the position with the distance x from the air outlet side of honeycomb, and sweep two points on the top of hole body and mark as two first mark points;Steel wire 1 is drawn between the two first mark points, and two lead sinkers 3 are arranged on steel wire 1 according to the distribution of honeycomb module 2;

[0037] S3, according to the number of honeycomb module 2, first install the first honeycomb module at the middle position of the first layer, and preliminarily position the first honeycomb module according to the two first mark points on the hole body;Arbitrarily select multiple points and measure the measured value of the distance from the end face of the first honeycomb module to the steel wire 1 by protractor 7, and adjust the position of the first honeycomb module by the deviation of the measured value and x value;

[0038] S4, fix the first honeycomb module on the hole body;

[0039] S5, symmetrically install the second honeycomb module at the opposite sides of the first honeycomb module, and adjust the positions of the two second honeycomb modules by the method in step S3;The contact surface of the second honeycomb module and the hole body is fixed, and the contact surface of the second honeycomb module and the first honeycomb module is fixed by fixed clamp;

[0040] S6, after the installation of the honeycomb module 2 on the first layer is completed, a plurality of honeycomb tubes 5 on the honeycomb module 2 on the first layer are randomly selected, and the probe rod 6 is inserted into the honeycomb tube 5; the angle instrument 4 is used to randomly measure the pitch angle deviation of each point where the plurality of honeycomb tubes 5 are located, and the perpendicularity between the cross section formed by the plurality of honeycomb tubes 5 and the central axis of the hole body is comprehensively evaluated;

[0041] S7, the honeycomb module 2 of the other layers is installed from bottom to top by using the same method as in steps S3 to S6.

[0042] S8, after the installation of the entire honeycomb is completed, the overall detection of the plurality of honeycomb modules 2 is performed by the steel wire method and the probe rod angle instrument method in steps S1 to S6, so that the perpendicularity and flatness of the cross section formed meet the design requirements.

[0043] S9, the electronic theodolite 9 is erected at the air outlet side of the honeycomb with the central axis of the hole body as the reference and is rotated by 90°, the measurement points are randomly selected at each honeycomb module 2, and the base of the precision depth gauge 8 is made to be in close contact with the end surface of the honeycomb by the precision depth gauge 8; the degree of the precision depth gauge 8 is measured by the electronic theodolite 9, and the deviation of each measurement point is evaluated, so that the installation accuracy of the honeycomb meets the design requirements.

[0044] It should be noted that each honeycomb module 2 is formed by welding a plurality of honeycomb tubes 5 and a frame, so the cross section formed by the plurality of honeycomb tubes 5 will certainly have a deviation, as long as the pipe openings of most of the honeycomb tubes 5 are coplanar, the probe rod 6 is a tool designed to cooperate with the structure of the honeycomb tube 5, which is convenient for the placement of the angle instrument 4, and the angle instrument 4 can directly read the value to determine whether the pitch angle of the honeycomb tube 5 is perpendicular to the earth.

[0045] It should be noted that in step S2, the electronic theodolite 9 is used to scan two first mark points on the top of the wind tunnel hole body with the central axis of the wind tunnel hole body as the reference, which can ensure that the line between the two points is perpendicular to the central axis of the hole body, and a steel wire 1 is laid between the two first mark points, and two lead sinkers 3 are hung from the steel wire 1, so that the steel wire 1 and the two lead sinkers 3 are coplanar and also perpendicular to the central axis of the hole body, and the distance from the honeycomb end surface to the lead sinker 3 is consistent, which can ensure that the honeycomb end surface is also perpendicular to the central axis of the hole body.

[0046] In addition, in step S4, the first honeycomb module is fixed to the hole body by screws or spot welding.

[0047] It should be noted that in step S5, the fixing clamp can be a G-type clamp. In step S6, the probe rod 6 can be a hexagonal probe rod.

[0048] In conclusion, the application provides a kind of measurement method for wind tunnel honeycomb installation, which adopts installation mode of local first and overall later, lower first and upper later, middle first and both sides later, and guarantees final installation precision through multiple verification controls of wire pulling method, testing rod method and theodolite ranging method.At the same time, it adopts installation method of local first and overall later, and guarantees honeycomb installation quality through theodolite, depth gauge 8, lead plummet 3, steel wire 1, angle gauge 4 and testing rod 6, etc., by measuring and controlling key technical indexes such as pitch angle, yaw angle, end face flatness and perpendicularity of single honeycomb module 2.In addition, it determines the center axis of the hole body by taking the center of the outlet of the stable section and the contraction section as the reference, which solves the problem of inconvenient determination of the center axis due to the deformation of the hole body caused by assembly welding.Furthermore, the method uses the newly determined center axis of the hole body as the reference, uses electronic theodolite 9 to determine the installation position of the honeycomb and monitor the position, so that the installation position is more accurate, and the measurement method is diversified.Furthermore, it adopts the idea of partial first and overall later in the installation process and after installation, uses wire method, testing rod theodolite method and precise depth gauge, electronic theodolite method for gradual monitoring, and multiple angles and multiple means for monitoring the entire installation quality, which effectively guarantees the final installation precision.

[0049] The above only describes the preferred embodiments of the application and is not used to limit the application, and the application can have various changes and variations for those skilled in the art.Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A measurement method for installing a wind tunnel honeycomb structure, characterized in that, Includes the following steps: S1. Using the central axis of the wind tunnel's stable section inlet and the central axis of its contraction section outlet as references, find the central axis of the wind tunnel body. Using the central axis of the wind tunnel body as references, set up an electronic theodolite near the installation position of the honeycomb unit. By rotating the electronic theodolite by 90°, lay out the installation section of the honeycomb unit on the inner wall of the wind tunnel body and mark it on the inner peripheral wall of the wind tunnel body so that the installation section of the honeycomb unit is perpendicular to the central axis of the wind tunnel body. S2, the electronic theodolite is set up at a distance x from the air outlet side of the honeycomb unit, and two points are swept out on the top of the hole and marked as two first marking points; a steel wire is stretched between the two first marking points, and two plumb bobs are set on the steel wire according to the distribution of the honeycomb unit modules; S3. First, install the first honeycomb module in the middle position of the first layer according to the number of the honeycomb module. Use the two first marking points on the hole as a reference to initially position the first honeycomb module. Arbitrarily select multiple points and measure the actual distance from the end face of the first honeycomb module to the steel wire using a square. Adjust the position of the first honeycomb module by the deviation between the measured value and the x value. S4, fix the first honeycomb module onto the cavity; S5, symmetrically install the second honeycomb modules on opposite sides of the first honeycomb module, and adjust the positions of the two second honeycomb modules using the method in step S3; fix the contact surface between the second honeycomb module and the hole, and fix the contact surface between the second honeycomb module and the first honeycomb module using a fixing clip; S6. After the honeycomb module on the first layer is installed, randomly select multiple honeycomb tubes in the honeycomb module on the first layer and insert the test rod into the honeycomb tube; use an angle meter to randomly measure the pitch angle deviation of each point where multiple honeycomb tubes are located, and comprehensively evaluate the perpendicularity between the cross section formed by multiple honeycomb tubes and the central axis of the cavity; S7, Install the cell modules of other layers from bottom to top using the same method as in steps S3 to S6; S8. After the entire cell unit is installed, the multiple cell unit modules are tested as a whole using the wire method and bar angle meter method in steps S1 to S6, so that the verticality and flatness of the formed cross section meet the design requirements. S9, at the air outlet side of the honeycomb unit, the electronic theodolite is set up with the central axis of the cavity as a reference and rotated 90°. Measurement points are randomly selected at each honeycomb unit module, and the base of the precision depth gauge is made to fit against the end face of the honeycomb unit using a precision depth gauge. The degree of the precision depth gauge is measured using the electronic theodolite, and the deviation of each measurement point is evaluated to ensure that the installation accuracy of the honeycomb unit meets the design requirements.

2. The measurement method for wind tunnel honeycomb assembly installation according to claim 1, characterized in that, In step S4, the first cell module is fixed to the hole body by screws or spot welding.

3. The measurement method for wind tunnel honeycomb assembly installation according to claim 1, characterized in that, In step S5, the fixing clip includes a G-type clip.

4. The measurement method for wind tunnel honeycomb assembly installation according to claim 1, characterized in that, In step S6, the test bar includes a hexagonal test bar.

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