Large-span wind tunnel three-dimensional mobile measuring frame

Abstract

The utility model belongs to the field of wind tunnel test equipment, and relates to a large-span wind tunnel three-dimensional mobile measuring frame, which comprises an axial track, a guide tackle, a power tackle, a transverse track, a transverse tackle, a vertical track and an electromagnet assembly, the guide tackle and the power tackle are in sliding fit with the axial track, the transverse track can drive the guide tackle and the power tackle to move, the transverse track is driven to slide on the axial track in the axial direction through movement of the guide tackle and the power tackle, the top end of the vertical track is fixedly connected with the transverse tackle, and the transverse tackle is in sliding fit with the transverse track. The transverse tackle can drive the vertical track to transversely slide on the transverse track, the electromagnet assembly is fixedly connected to the bottom end of the vertical track and used for being matched with the inner wall face of the wind tunnel, and the wind tunnel moving measuring frame solves the problem that at present, a common wind tunnel moving measuring frame cannot meet the measuring requirement of a large-size test section wind tunnel easily.

Description

Technical Field

[0001] The utility model belongs to the field of wind tunnel test equipment and relates to a three-dimensional mobile measuring frame for a large-span wind tunnel. Background Art

[0002] A wind tunnel is a test device that artificially generates and controls airflow to simulate the flow of gas around a test piece, and can measure the effect of airflow on the test piece and observe physical phenomena. It is the most commonly used and effective tool for aerodynamic experiments. During a wind tunnel experiment, a model or object is often fixed in the wind tunnel, and air is passed through the model. The experimental evaluation of the model prototype is obtained by measuring the relevant parameters of the model and its surroundings.

[0003] Generally speaking, the larger the characteristic size of the model, the higher the Re number of the wind tunnel test, the closer the aerodynamic characteristics of the wind tunnel test are to the aerodynamic characteristics of the test piece in the natural state, and the more accurate the test results of the wind tunnel test. Increasing the characteristic size of the model will also increase the size of the wind tunnel test section accordingly, and a larger span three-dimensional mobile measurement frame is required to measure the wind speed in the wind tunnel.

[0004] The three-dimensional wind tunnel measurement frame designed by patent CN102175417A (wind tunnel body spatial positioning test frame) uses a long-range scale belt to locate the spatial position of the measurement frame, and the guide rail locking method fixes the sensor test position, but the mobile measurement frame still needs to be manually positioned, and the operation is relatively complicated.

[0005] Patent CN102692312A realizes the two-dimensional free movement of the measuring rod, and with the arrangement of measuring equipment on the measuring rod, it realizes the quasi-three-dimensional wind tunnel measurement requirements and improves the automatic measurement capability of the mobile measuring frame. However, it is difficult to apply to the three-dimensional mobile measuring frame of a large-span wind tunnel. At the same time, the quasi-three-dimensional measurement scheme is still relatively cumbersome.

[0006] Patent CN111198089A uses a servo motor to drive a lead screw to achieve three-dimensional measurement of wind tunnel data, but the lead screw transmission solution is not suitable for large-span wind tunnel three-dimensional transfer measurement frames. Large-sized lead screws are more difficult to process and drive, and the driving efficiency is low.

[0007] In the prior art, the mobile test frame of a wind tunnel is mainly used to meet the needs of the wind tunnel, measure data such as wind speed and wind pressure at various locations in the wind tunnel test section, determine the uniform wind field range and data parameters of the wind tunnel test section, and ensure the accuracy of the wind tunnel test. Currently, the commonly used mobile measurement frames of wind tunnels are difficult to meet the measurement needs of large-scale test section wind tunnels. When the size of the wind tunnel increases, the driving power required for the three-dimensional mobile measurement frame will increase sharply, and it may even be difficult to drive. At the same time, after the three-dimensional mobile measurement frame of the wind tunnel moves in a large size, it is necessary to maintain stability in the measurement state to avoid the influence of wind speed excitation and the coupling of the three-dimensional mobile measurement frame structure on the test measurement. Utility Model Content

[0008] The purpose of the utility model is to provide a large-span three-dimensional mobile measuring frame for a wind tunnel, which is used to solve the problem that the currently commonly used wind tunnel mobile measuring frames are difficult to meet the measurement needs of large-sized test section wind tunnels. When the size of the wind tunnel increases, the driving power required for the three-dimensional mobile measuring frame will increase sharply, or even become difficult to drive. At the same time, when the wind tunnel three-dimensional mobile measuring frame moves in a large size, the utility model can maintain stability in the measuring state, avoiding the influence of wind speed excitation on the test measurement after coupling with the three-dimensional mobile measuring frame structure.

[0009] In view of the above objectives, the present invention adopts the following technical solutions to achieve the above objectives.

[0010] A three-dimensional mobile measurement frame for a large-span wind tunnel comprises an axial track 1, a guide pulley 2, a power pulley 3, a transverse track 4, a transverse pulley 5, a vertical track 6 and an electromagnet assembly 7. The guide pulley 2 and the power pulley 3 are respectively fixed at both ends of the transverse track 4, the guide pulley 2 and the power pulley 3 are respectively slidably matched with the axial track 1, the transverse track 4 can drive the guide pulley 2 and the power pulley 3 to move, and the transverse track 4 is driven to slide axially on the axial track 1 through the movement of the guide pulley 2 and the power pulley 3, the top end of the vertical track 6 is fixedly connected to the transverse pulley 5, the transverse pulley 5 is slidably matched with the transverse track 4, the transverse pulley 5 can drive the vertical track 6 to slide horizontally on the transverse track 4, and the electromagnet assembly 7 is fixedly connected to the bottom end of the vertical track 6 for matching with the inner wall surface of the wind tunnel.

[0011] Further, the axial track 1 includes a left axial track that is slidably matched with the guide pulley 2, and a right axial track that is slidably matched with the power pulley 3;

[0012] The left axial track includes an axial H-shaped steel 1-1, an axial V-shaped guide rail 1-2 is arranged on the left side of the lower part of the H-shaped steel 1-1, and an axial flat guide rail 1-3 is arranged on the right side;

[0013] The right axial track includes an axial H-shaped steel 1-1, an axial flat guide rail 1-3 is arranged on the left side of the lower part of the H-shaped steel 1-1, an axial drag chain hook 1-4 is fixedly connected to the bottom of the axial H-shaped steel 1-1, and an axial cable drag chain 1-5 is placed on the axial drag chain hook 1-4.

[0014] Further, the guide pulley 2 includes a guide wheel frame 2-1, the guide wheel frame 2-1 includes a horizontal frame plate bolted to the left end of the horizontal track 4, and two vertical frame plates symmetrically arranged on the horizontal frame plate, one of which is provided with a V-shaped roller 2-2, and the other vertical frame plate is provided with a guide flat roller 2-3, the guide flat roller 2-3 is connected to the guide drive shaft 2-4, and the guide drive shaft 2-4 passes through the vertical frame plate and is connected to the drive shaft 4-5 of the horizontal track 4;

[0015] The axial H-shaped steel 1-1 of the left axial track is arranged between two vertical frame plates, the axial V-shaped guide rail 1-2 on the left side of the axial H-shaped steel 1-1 of the left axial track slides with the V-shaped roller 2-2, and the axial flat guide rail 1-3 on the right side slides with the guide flat roller 2-3.

[0016] Further, the power pulley 3 includes a power wheel frame 3-1, a power flat roller 3-2, and a power transmission shaft 3-3. The power wheel frame 3-1 is an L-shaped structure, including a horizontal part and a vertical part. The horizontal part is bolted to the right end of the transverse track 4, and a power flat roller 3-2 is arranged vertically. The power flat roller 3-2 is connected to the power transmission shaft 3-3, and the power transmission shaft 3-3 is connected to the transmission shaft 4-5 of the transverse track 4.

[0017] The powered flat roller 3-2 is slidably matched with the axial flat guide rail 1-3 on the axial H-shaped steel 1-1 of the right axial track.

[0018] Further, the transverse track 4 includes two transverse H-shaped steels 4-1, a rectangular steel 4-2, a transverse V-shaped guide rail 4-3, a transverse flat guide rail 4-4, a transmission shaft 4-5, a transverse drag chain hook 4-6, a transverse cable drag chain 4-7, an axial drive motor 4-8, and a transverse fairing 4-9;

[0019] Two transverse H-shaped steels 4-1 are arranged in parallel and connected by a rectangular steel 4-2. A transverse fairing 4-9 is provided on one side of one of the transverse H-shaped steels 4-1, and a transverse V-shaped guide rail 4-3 is provided on the other side. A transverse flat guide rail 4-4 is provided on the side of the other transverse H-shaped steel 4-1 close to the transverse V-shaped guide rail 4-3, and a transverse transmission shaft 4-5 is provided on the side away from the transverse V-shaped guide rail 4-3. Both ends of the transmission shaft 4-5 are respectively connected with the guide transmission shaft 2-4 and the power transmission shaft 3-3 through couplings. The output shaft of the axial drive motor 4-8 is connected with the transmission shaft 4-5 through a coupling, driving the transmission shaft 4-5 to rotate, thereby driving the guide transmission shaft 2-4 and the power transmission shaft 3-3 to rotate through the transmission shaft 4-5, the guide transmission shaft 2-4 drives the guide flat roller 2-3 to rotate, and the power transmission shaft 3-3 drives the power flat roller 3-2 to rotate;

[0020] A transverse drag chain hook 4-6 is connected to the lower part of the transverse H-shaped steel 4-1 provided with a transverse flat guide rail 4-4, and a transverse cable drag chain 4-7 is placed on the transverse drag chain hook 4-6.

[0021] Furthermore, the transverse pulley 5 includes a transverse wheel frame 5-1, a transverse flat roller 5-2, a transverse V-shaped roller 5-3, and a transverse driving motor 5-4; transverse flat rollers 5-2 and transverse V-shaped rollers 5-3 are respectively arranged on both sides of the transverse wheel frame 5-1, the transverse flat roller 5-2 is slidably matched with the transverse flat guide rail 4-4 of the transverse track 4, and the transverse V-shaped roller 5-3 is slidably matched with the transverse V-shaped guide rail 4-3 of the transverse track 4; a transverse driving motor 5-4 is arranged in the middle of the transverse wheel frame 5-1, and the transverse driving motor 5-4 is connected to the transverse V-shaped roller 5-3 through a coupling, so as to drive the transverse V-shaped roller 5-3 to move along the transverse track 4.

[0022] Further, the vertical track 6 includes a vertical drive motor 6-1, a motor bracket 6-2, a lead screw 6-3, a linear slide rail 6-4, an anemometer mounting bracket 6-5, and a vertical fairing 6-6;

[0023] The top of the motor bracket 6-2 is connected to the transverse wheel frame 5-1 by bolts, and a connecting plate 6-7 is provided at the bottom;

[0024] The lead screw 6-3 is arranged at the rear end of the motor bracket 6-2, and there are two linear slide rails 6-4, which are respectively arranged on the left and right sides of the motor bracket 6-2. The vertical drive motor 6-1 is arranged on the top of the motor bracket 6-2. The output shaft of the vertical drive motor 6-1 is connected with the lead screw 6-3 to drive the lead screw 6-3 to rotate. The middle part of the anemometer mounting frame 6-5 is threadedly connected with the lead screw 6-3, and the two ends of the anemometer mounting frame 6-5 are respectively slidably matched with the two linear slide rails 6-4. When the lead screw 6-3 rotates, the anemometer mounting frame 6-5 can move up and down along the lead screw 6-3 and the linear slide rails 6-4. A vertical fairing 6-6 is installed at the front end of the motor bracket 6-2.

[0025] Further, the electromagnet assembly 7 includes a spring 7-1, a guide rod 7-2, a fixing bolt 7-3, and an electromagnet 7-4;

[0026] The electromagnet 7-4 is installed at the bottom of the fixing plate 7-5 by fixing bolts 7-3. There are two guide rods 7-2, which are respectively arranged on the fixing plate 7-5. The top passes through the connecting plate 6-7 of the vertical track 6 and is matched with the connecting plate 6-7. A nut is arranged on the top of the guide rod 7-2, and a spring 7-1 is sleeved on the upper end of the guide rod 7-2, and the spring 7-1 is located between the nut and the connecting plate 6-7. When the electromagnet 7-4 is not energized, the electromagnet 7-4 is only affected by gravity and has a certain gap with the inner wall of the wind tunnel, which does not affect the lateral and axial movement of the mobile measuring frame; when the mobile measuring frame moves into place, the electromagnet 7-4 is energized to generate suction and is tightly fixed to the inner wall of the wind tunnel. The electromagnet 7-4 drives the guide rod 7-2 to move downward. At this time, under the limiting action of the connecting plate 6-7, the spring 7-1 is in a compressed state, thereby realizing the fixation and support of the vertical track 6 of the mobile measuring frame.

[0027] Beneficial effects of the utility model:

[0028] 1. The three-dimensional mobile measurement frame of the large-span wind tunnel adopts the moving mode of the pulley walking along the track, which controls the mass of the moving part, reduces the driving power of the mobile measurement frame, and improves the energy utilization efficiency of the mobile measurement frame.

[0029] 2. A fairing is added to the windward side of the large-span wind tunnel three-dimensional mobile measurement frame, which reduces the resistance loss of the mobile measurement frame to the wind tunnel test airflow, reduces the impact of the mobile measurement frame on the wind tunnel test, and improves the accuracy of the wind tunnel test.

[0030] 3. The three-dimensional mobile measurement frame of the large-span wind tunnel is equipped with an electromagnet structure at the bottom of the vertical guide rail, which increases the support points of the vertical guide rail, improves the stability of the vertical guide rail, and ensures the accuracy of the wind speed measurement process of the mobile measurement frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the three-dimensional mobile measurement frame of the wind tunnel of the utility model;

[0032] Figure 2 This is a schematic diagram of the axial track structure of the utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the guide pulley of the utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the power pulley of the utility model;

[0035] Figure 5 This is a schematic diagram of the transverse track structure of the utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the transverse pulley of the utility model;

[0037] Figure 7 This is a schematic diagram of the vertical track structure of the utility model;

[0038] Figure 8 This is a schematic diagram of the structure of the electromagnet assembly of the utility model

[0039] Fig. 9 This is a schematic diagram of the arrangement of the linear guide rail of the utility model;

[0040] Fig.10 This is a three-dimensional schematic diagram of the cooperation between the guide pulley of the utility model and the axial track and the transverse track;

[0041] Fig.11 It is a two-dimensional schematic diagram of the cooperation between the guide pulley of the utility model and the axial track and the transverse track;

[0042] Fig.12 It is a three-dimensional schematic diagram of the cooperation between the power pulley of the utility model and the axial track and the transverse track;

[0043] Fig.13 It is a two-dimensional schematic diagram of the cooperation between the power pulley of the utility model and the axial track and the transverse track;

[0044] In the figure, 1. axial track, 2. guide pulley, 3. power pulley, 4. transverse track, 5. transverse pulley, 6. vertical track, 7. electromagnet assembly, 1-1. axial H-shaped steel, 1-2. axial V-shaped guide rail, 1-3. axial flat guide rail, 1-4. axial drag chain hook, 1-5. axial cable drag chain, 2-1. guide wheel frame, 2-2. guide V-shaped roller, 2-3. guide flat roller, 2-4. guide transmission shaft, 3-1. power wheel frame, 3-2. power flat roller, 3-3. power transmission shaft, 4-1. transverse H-shaped steel, 4-2. rectangular steel, 4-3. transverse V-shaped guide rail, 4-4. Transverse flat guide rail, 4-5. Transmission shaft, 4-6. Transverse drag chain hook, 4-7. Transverse cable drag chain, 4-8. Axial drive motor, 4-9. Transverse fairing, 5-1. Transverse wheel frame, 5-2. Transverse flat roller, 5-3. Transverse V-shaped roller, 5-4. Transverse drive motor, 6-1. Vertical drive motor, 6-2. Motor bracket, 6-3. Lead screw, 6-4. Linear slide rail, 6-5. Anemometer mounting bracket, 6-6. Vertical fairing, 6-7. Connecting plate, 7-1. Spring, 7-2. Guide rod, 7-3. Fixing bolt, 7-4. Electromagnet, 7-5. Fixing plate. DETAILED DESCRIPTION

[0045] The utility model is further introduced below in conjunction with the accompanying drawings:

[0046] like Figure 1As shown, the utility model provides a large-span three-dimensional mobile measurement frame for a wind tunnel, comprising an axial track 1, a guide pulley 2, a power pulley 3, a transverse track 4, a transverse pulley 5, a vertical track 6 and an electromagnet assembly 7. The guide pulley 2 and the power pulley 3 are respectively fixed at both ends of the transverse track 4, and the guide pulley 2 and the power pulley 3 are respectively slidably matched with the axial track 1. The transverse track 4 can drive the guide pulley 2 and the power pulley 3 to move, and the movement of the guide pulley 2 and the power pulley 3 drives the transverse track 4 to slide axially on the axial track 1. The top of the vertical track 6 is fixedly connected to the transverse pulley 5, and the transverse pulley 5 is slidably matched with the transverse track 4. The transverse pulley 5 can drive the vertical track 6 to slide horizontally on the transverse track 4. The electromagnet assembly 7 is fixedly connected to the bottom end of the vertical track 6 for matching with the inner wall of the wind tunnel.

[0047] like Figure 2 As shown, the axial track 1 includes a left axial track that is slidably matched with the guide pulley 2, and a right axial track that is slidably matched with the power pulley 3;

[0048] The left axial track includes an axial H-shaped steel 1-1, an axial V-shaped guide rail 1-2 is arranged on the left side of the lower part of the H-shaped steel 1-1, and an axial flat guide rail 1-3 is arranged on the right side;

[0049] The right axial track includes an axial H-shaped steel 1-1, an axial flat guide rail 1-3 is arranged on the left side of the lower part of the H-shaped steel 1-1, an axial drag chain hook 1-4 is fixedly connected to the bottom of the axial H-shaped steel 1-1, an axial cable drag chain 1-5 is placed on the axial drag chain hook 1-4, and the axial cable drag chain 1-5 is placed on the axial drag chain hook 1-4 to prevent the axial cable from being unable to be fixed under the action of airflow and affecting the safe use of the mobile measuring frame.

[0050] like Figure 3 As shown, the guide pulley 2 includes a guide wheel frame 2-1, and the guide wheel frame 2-1 includes a horizontal frame plate bolted to the left end of the horizontal track 4, and two vertical frame plates symmetrically arranged on the horizontal frame plate, one of which is provided with a V-shaped roller 2-2, and the other vertical frame plate is provided with a guide flat roller 2-3, and the guide flat roller 2-3 is connected to the guide drive shaft 2-4, and the guide drive shaft 2-4 passes through the vertical frame plate and is connected to the drive shaft 4-5 of the horizontal track 4;

[0051] like Fig.10 , 11 As shown, the axial H-shaped steel 1-1 of the left axial track is arranged between two vertical frame plates, the axial V-shaped guide rail 1-2 on the left side of the axial H-shaped steel 1-1 of the left axial track slides with the V-shaped roller 2-2, and the axial flat guide rail 1-3 on the right side slides with the guide flat roller 2-3.

[0052] like Figure 4As shown, the power pulley 3 includes a power wheel frame 3-1, a power flat roller 3-2, and a power transmission shaft 3-3. The power wheel frame 3-1 is an L-shaped structure, including a horizontal part and a vertical part. The horizontal part is bolted to the right end of the transverse track 4, and a power flat roller 3-2 is arranged vertically. The power flat roller 3-2 is connected to the power transmission shaft 3-3, and the power transmission shaft 3-3 is connected to the transmission shaft 4-5 of the transverse track 4.

[0053] like Fig.12 , 13 As shown, the powered flat roller 3-2 is slidably matched with the axial flat guide rail 1-3 on the axial H-shaped steel 1-1 of the right axial track.

[0054] like Figure 5 As shown, the transverse track 4 includes two transverse H-shaped steels 4-1, a rectangular steel 4-2, a transverse V-shaped guide rail 4-3, a transverse flat guide rail 4-4, a transmission shaft 4-5, a transverse drag chain hook 4-6, a transverse cable drag chain 4-7, an axial drive motor 4-8, and a transverse fairing 4-9;

[0055] Two transverse H-shaped steels 4-1 are arranged in parallel and connected by a rectangular steel 4-2. A transverse fairing 4-9 is provided on one side of one of the transverse H-shaped steels 4-1, and a transverse V-shaped guide rail 4-3 is provided on the other side. A transverse flat guide rail 4-4 is provided on the side of the other transverse H-shaped steel 4-1 close to the transverse V-shaped guide rail 4-3, and a transverse transmission shaft 4-5 is provided on the side away from the transverse V-shaped guide rail 4-3. Both ends of the transmission shaft 4-5 are respectively connected to the guide transmission shaft 2-4 and the power transmission shaft 3-3 through couplings. The output shaft of the axial drive motor 4-8 is connected to the transmission shaft 4-5 through a coupling, a gear reversing mechanism commonly used in the prior art, etc., to drive the transmission shaft 4-5 to rotate, thereby driving the guide transmission shaft 2-4 and the power transmission shaft 3-3 to rotate through the transmission shaft 4-5, the guide transmission shaft 2-4 drives the guide flat roller 2-3 to rotate, and the power transmission shaft 3-3 drives the power flat roller 3-2 to rotate;

[0056] A transverse drag chain hook 4-6 is connected to the lower part of the transverse H-shaped steel 4-1 provided with a transverse flat guide rail 4-4, and a transverse cable drag chain 4-7 is placed on the transverse drag chain hook 4-6.

[0057] The transmission shaft 4-5 is connected to the axial drive motor 4-8 and the guide pulley 2 and the power pulley 3 through the coupling, driving the guide flat roller 2-3 and the power flat roller 3-2 to rotate, driving the transverse track 4 to move along the axis direction. The transverse drag chain hook 4-6 is installed on the lower plane of the transverse H-shaped steel 4-1, carrying the transverse cable drag chain 4-7 to prevent the transverse cable from being unable to be fixed under the action of airflow, affecting the safety of the mobile measurement frame. A transverse fairing 4-9 is installed at the front end of the transverse track 4 to reduce the impact of the transverse track 4 of the mobile measurement frame on the wind tunnel test and improve the airflow quality of the wind tunnel test.

[0058] like Figure 6 As shown, the transverse pulley 5 includes a transverse wheel frame 5-1, a transverse flat roller 5-2, a transverse V-shaped roller 5-3, and a transverse driving motor 5-4; transverse flat rollers 5-2 and transverse V-shaped rollers 5-3 are respectively arranged on both sides of the transverse wheel frame 5-1, the transverse flat roller 5-2 is slidably matched with the transverse flat guide rail 4-4 of the transverse track 4, and the transverse V-shaped roller 5-3 is slidably matched with the transverse V-shaped guide rail 4-3 of the transverse track 4; a transverse driving motor 5-4 is arranged in the middle of the transverse wheel frame 5-1, and the transverse driving motor 5-4 is connected to the transverse V-shaped roller 5-3 through a coupling, so as to drive the transverse V-shaped roller 5-3 to move along the transverse track 4, thereby realizing the ability of the mobile measuring frame to move laterally.

[0059] like Figure 7 As shown, the vertical track 6 includes a vertical drive motor 6-1, a motor bracket 6-2, a lead screw 6-3, a linear slide rail 6-4, an anemometer mounting bracket 6-5, and a vertical fairing 6-6;

[0060] The top of the motor bracket 6-2 is connected to the transverse wheel frame 5-1 by bolts, and a connecting plate 6-7 is provided at the bottom;

[0061] The lead screw 6-3 is arranged at the rear end of the motor bracket 6-2, and there are two linear slide rails 6-4, which are respectively arranged on the left and right sides of the motor bracket 6-2. The vertical drive motor 6-1 is arranged on the top of the motor bracket 6-2. The output shaft of the vertical drive motor 6-1 is connected with the lead screw 6-3 to drive the lead screw 6-3 to rotate. The middle part of the anemometer mounting frame 6-5 is threadedly connected with the lead screw 6-3, and the two ends of the anemometer mounting frame 6-5 are respectively slidably matched with the two linear slide rails 6-4. When the lead screw 6-3 rotates, the anemometer mounting frame 6-5 can move up and down along the lead screw 6-3 and the linear slide rails 6-4. A vertical fairing 6-6 is installed at the front end of the motor bracket 6-2.

[0062] The anemometer mounting frame 6-5 is driven to move up and down by the lead screw 6-3, and the anemometer mounting frame 6-5 is constrained in direction by the linear slide rail 6-4. A vertical fairing 6-6 is installed at the front end of the vertical track 6 to reduce the influence of the vertical track 6 of the mobile measuring frame on the wind tunnel test and improve the airflow quality of the wind tunnel test;

[0063] like Fig. 9 As shown, the linear slide rail 6-4 is arranged asymmetrically, which can improve the guiding accuracy of the linear slide rail 6-4, ensure the accuracy of the vertical movement of the anemometer mounting frame 6-5, and improve the measurement accuracy of the mobile measuring frame.

[0064] like Figure 8 As shown, the electromagnet assembly 7 includes a spring 7-1, a guide rod 7-2, a fixing bolt 7-3, and an electromagnet 7-4;

[0065] The electromagnet 7-4 is installed at the bottom of the fixing plate 7-5 by fixing bolts 7-3. There are two guide rods 7-2, which are respectively arranged on the fixing plate 7-5. The top passes through the connecting plate 6-7 of the vertical track 6 and is matched with the connecting plate 6-7. A nut is arranged on the top of the guide rod 7-2, and a spring 7-1 is sleeved on the upper end of the guide rod 7-2, and the spring 7-1 is located between the nut and the connecting plate 6-7. When the electromagnet 7-4 is not energized, the electromagnet 7-4 is only affected by gravity and has a certain gap with the inner wall of the wind tunnel, which does not affect the lateral and axial movement of the mobile measuring frame; when the mobile measuring frame moves into place, the electromagnet 7-4 is energized to generate suction and is tightly fixed to the inner wall of the wind tunnel. The electromagnet 7-4 drives the guide rod 7-2 to move downward. At this time, under the limiting action of the connecting plate 6-7, the spring 7-1 is in a compressed state, thereby realizing the fixation and support of the vertical track 6 of the mobile measuring frame.

[0066] The utility model solves the problem that the currently commonly used wind tunnel mobile measurement frames are difficult to meet the measurement needs of large-scale test section wind tunnels. When the size of the wind tunnel increases, the driving power required for the three-dimensional mobile measurement frame will increase sharply, or even become difficult to drive. At the same time, when the wind tunnel three-dimensional mobile measurement frame moves in a large size, the utility model can maintain stability in the measurement state, avoiding the influence of wind speed excitation on the test measurement after coupling with the three-dimensional mobile measurement frame structure.

[0067] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-dimensional mobile measurement frame for a large-span wind tunnel, characterized in that: The invention comprises an axial track (1), a guide pulley (2), a power pulley (3), a transverse track (4), a transverse pulley (5), a vertical track (6) and an electromagnet assembly (7). The guide pulley (2) and the power pulley (3) are respectively fixed at two ends of the transverse track (4). The guide pulley (2) and the power pulley (3) are respectively slidably matched with the axial track (1). The transverse track (4) can drive the guide pulley (2) and the power pulley (3) to move, and the movement of the guide pulley (2) and the power pulley (3) drives the transverse track (4) to slide axially on the axial track (1). The top end of the vertical track (6) is fixedly connected to the transverse pulley (5). The transverse pulley (5) and the transverse track (4) are slidably matched. The transverse pulley (5) can drive the vertical track (6) to slide transversely on the transverse track (4). The electromagnet assembly (7) is fixedly connected to the bottom end of the vertical track (6) and is used to match with the inner wall surface of the wind tunnel.

2. A large-span wind tunnel three-dimensional mobile measurement frame according to claim 1, characterized in that: The axial track (1) comprises a left axial track that is slidably matched with the guide pulley (2), and a right axial track that is slidably matched with the power pulley (3); The left axial track comprises an axial H-shaped steel (1-1), an axial V-shaped guide rail (1-2) is arranged on the left side of the lower part of the H-shaped steel (1-1), and an axial flat guide rail (1-3) is arranged on the right side; The right axial track comprises an axial H-shaped steel (1-1), an axial flat guide rail (1-3) is arranged on the left side of the lower part of the H-shaped steel (1-1), an axial drag chain hook (1-4) is fixedly connected to the bottom of the axial H-shaped steel (1-1), and an axial cable drag chain (1-5) is placed on the axial drag chain hook (1-4).

3. A large-span wind tunnel three-dimensional mobile measurement frame according to claim 2, characterized in that: The guide pulley (2) comprises a guide wheel frame (2-1), wherein the guide wheel frame (2-1) comprises a transverse frame plate bolted to the left end of the transverse track (4), and two vertical frame plates symmetrically arranged on the transverse frame plate, wherein one of the vertical frame plates is provided with a V-shaped roller (2-2), and the other vertical frame plate is provided with a guide flat roller (2-3), the guide flat roller (2-3) is connected to a guide transmission shaft (2-4), and the guide transmission shaft (2-4) passes through the vertical frame plate and is connected to a transmission shaft (4-5) of the transverse track (4); The axial H-shaped steel (1-1) of the left axial track is arranged between two vertical frame plates, the axial V-shaped guide rail (1-2) on the left side of the axial H-shaped steel (1-1) of the left axial track is slidably matched with the V-shaped roller (2-2), and the axial flat guide rail (1-3) on the right side is slidably matched with the guide flat roller (2-3).

4. The large-span three-dimensional mobile measurement frame of a wind tunnel according to claim 3, characterized in that: The power pulley (3) comprises a power wheel frame (3-1), a power flat roller (3-2), and a power transmission shaft (3-3). The power wheel frame (3-1) is an L-shaped structure, comprising a horizontal part and a vertical part. The horizontal part is bolted to the right end of the transverse track (4). The vertical part is provided with a power flat roller (3-2). The power flat roller (3-2) is connected to a power transmission shaft (3-3). The power transmission shaft (3-3) is connected to a transmission shaft (4-5) of the transverse track (4). The powered flat roller (3-2) is slidably matched with the axial flat guide rail (1-3) on the axial H-shaped steel (1-1) of the right axial track.

5. The large-span three-dimensional mobile measurement frame of a wind tunnel according to claim 4, characterized in that: The transverse track (4) includes two transverse H-shaped steels (4-1), a rectangular steel (4-2), a transverse V-shaped guide rail (4-3), a transverse flat guide rail (4-4), a transmission shaft (4-5), a transverse drag chain hook (4-6), a transverse cable drag chain (4-7), an axial drive motor (4-8), and a transverse fairing (4-9); Two transverse H-shaped steels (4-1) are arranged in parallel and connected by a rectangular steel (4-2). A transverse fairing (4-9) is arranged on one side of one transverse H-shaped steel (4-1) and a transverse V-shaped guide rail (4-3) is arranged on the other side. A transverse flat guide rail (4-4) is arranged on the side of the other transverse H-shaped steel (4-1) close to the transverse V-shaped guide rail (4-3) and a transverse transmission shaft (4-5) is arranged on the side away from the transverse V-shaped guide rail (4-3). Both ends of the transmission shaft (4-5) are connected by connecting rods. The shaft device is respectively connected to the guide transmission shaft (2-4) and the power transmission shaft (3-3); the output shaft of the axial drive motor (4-8) is connected to the transmission shaft (4-5) through a coupling, and the transmission shaft (4-5) is driven to rotate, thereby driving the guide transmission shaft (2-4) and the power transmission shaft (3-3) to rotate through the transmission shaft (4-5); the guide transmission shaft (2-4) drives the guide flat roller (2-3) to rotate, and the power transmission shaft (3-3) drives the power flat roller (3-2) to rotate; The lower part of the transverse H-shaped steel (4-1) provided with a transverse flat guide rail (4-4) is connected with a transverse drag chain hook (4-6), and the transverse cable drag chain (4-7) is placed on the transverse drag chain hook (4-6).

6. The large-span three-dimensional mobile measurement frame of a wind tunnel according to claim 5, characterized in that: The transverse pulley (5) comprises a transverse wheel frame (5-1), a transverse flat roller (5-2), a transverse V-shaped roller (5-3), and a transverse drive motor (5-4); the transverse wheel frame (5-1) is provided with a transverse flat roller (5-2) and a transverse V-shaped roller (5-3) on both sides thereof; the transverse flat roller (5-2) is slidably matched with a transverse flat guide rail (4-4) of a transverse track (4); the transverse V-shaped roller (5-3) is slidably matched with a transverse V-shaped guide rail (4-3) of the transverse track (4); a transverse drive motor (5-4) is provided in the middle of the transverse wheel frame (5-1); the transverse drive motor (5-4) is connected to the transverse V-shaped roller (5-3) through a coupling, and drives the transverse V-shaped roller (5-3) to move along the transverse track (4).

7. The large-span three-dimensional mobile measurement frame of a wind tunnel according to claim 6, characterized in that: The vertical track (6) comprises a vertical drive motor (6-1), a motor bracket (6-2), a lead screw (6-3), a linear slide rail (6-4), an anemometer mounting frame (6-5), and a vertical fairing (6-6); The top of the motor bracket (6-2) is connected to the transverse wheel frame (5-1) by bolts, and a connecting plate (6-7) is provided at the bottom; The lead screw (6-3) is arranged at the rear end of the motor bracket (6-2), there are two linear slide rails (6-4), which are respectively arranged on the left and right sides of the motor bracket (6-2), the vertical drive motor (6-1) is arranged at the top of the motor bracket (6-2), the output shaft of the vertical drive motor (6-1) is connected with the lead screw (6-3), and the lead screw (6-3) is driven to rotate, the middle part of the anemometer mounting frame (6-5) is threadedly connected with the lead screw (6-3), the two ends of the anemometer mounting frame (6-5) are respectively slidably matched with the two linear slide rails (6-4), when the lead screw (6-3) rotates, the anemometer mounting frame (6-5) can move up and down along the lead screw (6-3) and the linear slide rails (6-4), and the front end of the motor bracket (6-2) is equipped with a vertical fairing (6-6).

8. The large-span three-dimensional mobile measurement frame of a wind tunnel according to claim 7, characterized in that: The electromagnet assembly (7) comprises a spring (7-1), a guide rod (7-2), a fixing bolt (7-3), and an electromagnet (7-4); The electromagnet (7-4) is installed at the bottom of the fixing plate (7-5) through a fixing bolt (7-3). There are two guide rods (7-2), which are respectively arranged on the fixing plate (7-5). The top of the guide rod (7-2) passes through the connecting plate (6-7) of the vertical track (6) and is clearance-matched with the connecting plate (6-7). A nut is arranged at the top of the guide rod (7-2). The spring (7-1) is sleeved on the upper end of the guide rod (7-2), and the spring (7-1) is located between the nut and the connecting plate (6-7). When the electromagnet (7-4) is not When energized, the electromagnet (7-4) is only acted upon by gravity, and has a certain gap with the inner wall of the wind tunnel, so as not to affect the lateral and axial movement of the mobile measuring frame. When the mobile measuring frame moves into position, the electromagnet (7-4) is energized to generate suction, and is tightly fixed to the inner wall of the wind tunnel. The electromagnet (7-4) drives the guide rod (7-2) to move downward. At this time, under the limiting action of the connecting plate (6-7), the spring (7-1) is in a compressed state, so that the vertical track (6) of the mobile measuring frame is fixed and supported.

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