An experimental device for dynamic pitching motion of a model

Abstract

The present application relates to experimental fluid mechanics sensor technical field, specifically for a kind of experimental device for model to do dynamic pitch motion, the device is by driver, executive cross rail, front connector, rear connector, bolt, connecting block, sliding guide and device connector constitute;Driver is connected with front connector and rear connector respectively, driver drives the up-and-down linear motion of front connector and rear connector, the front end of executive cross rail is connected with front connector by bolt and is placed into model connector and is fastened by thread, rear end uses plug bolt and nut to connect two connecting blocks and is fixed with rear connector.The present application is by when driver drives front connector and rear connector to increase spacing, the relative displacement of connecting block on sliding guide is generated, executive cross rail is around the bolt of front end and the plug bolt of rear end to realize pitch motion, whole device is simple, convenient, low in cost and does not affect flow field observation and measurement, and universality is strong.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of experimental fluid mechanics sensor, in particular to an experimental device for dynamic pitching motion of a model. BACKGROUND

[0002] Dynamic pitching motion is one of the classic unsteady motion modes, which is often seen in high maneuvering such as biological swimming and flight; in order to explore the fluid mechanics principle of high maneuvering swimming and flight, a sensor or device capable of realizing stable and reliable pitching motion without adding disturbance to the flow field is urgently needed, which is simple, efficient and has strong universality.

[0003] Therefore, an experimental device for dynamic pitching motion of a model is proposed to solve the problems in the above. SUMMARY

[0004] To achieve the above purpose, the present application provides the following technical scheme:

[0005] An experimental device for dynamic pitching motion of a model, characterized by comprising a driver, two groups of drivers are connected with a front connector and a rear connector respectively, the driver drives the driver and the rear connector to move linearly up and down; the front connector is connected with the front ends of the two groups of execution horizontal rails through a pin and is put into the device connector and fastened by threads, the rear connector is connected and fixed with the two groups of connecting blocks through a plug screw and a nut; the pin, the front connector, the plug screw and the rear connector are connected by a rolling bearing; the two groups of connecting blocks are connected with the sliding guide rails at the rear ends of the two groups of execution horizontal rails respectively; when the two groups of drivers drive the front connector and the rear connector to increase the distance, the connecting blocks on the sliding guide rails produce relative displacement, and the execution horizontal rails realize the pitching motion of the model around the pin at the front end and the plug screw at the rear end.

[0006] Preferably, the model connector is fastened with the execution horizontal rail by threads, and there is no relative sliding during movement.

[0007] Preferably, a cavity is arranged in the end of the execution horizontal rail away from the model connector;

[0008] A driving motor is connected in the cavity by a screw, a worm gear set is fixedly connected to the output shaft of the driving motor, a bidirectional threaded drive shaft is fixedly connected to the center of the worm gear in the worm gear set, and a sliding rod is threadedly connected to the side wall of the bidirectional threaded drive shaft.

[0009] Preferably, a connecting rack is fixedly connected to the side wall of the cavity, a linear slide rail is fixedly connected to the top of the execution horizontal rail, a scraper is fixedly connected to the sliding end of the linear slide rail, a detection plate is connected to the side wall of the scraper, and a plurality of distance sensors are arranged on the side wall of the detection plate.

[0010] The driving gear is rotatably connected to the top of the sliding rod, the matching hollow cylinder is fixedly connected to the top of the sliding rod, the driving screw rod is fixedly connected to the center of the driving gear, the connecting column is screw-connected to the side of the driving screw rod, and the connecting column is slidingly connected in the matching hollow cylinder.

[0011] The sphere is fixedly connected to the top of the connecting column, the insertion rod is slidingly connected to the side wall of the matching hollow cylinder, the insertion rod is fixedly connected to the side wall of the arc-shaped plate, and the pressure sensor is arranged on the side of the arc-shaped plate.

[0012] The bottom of the sliding guide rail is provided with a plurality of insertion holes, and the matching hollow cylinder is connected with the insertion holes.

[0013] The cavity is provided with a plurality of limiting assemblies, and the limiting assemblies comprise a worm gear and a worm, a bidirectional threaded drive shaft, a sliding rod, a connecting rack, a linear sliding rail, a driving gear, a matching hollow cylinder, a driving screw rod, a connecting column, a sphere, an insertion rod and an arc-shaped plate.

[0014] The plurality of matching hollow cylinders and arc-shaped plates are connected with the insertion holes at the bottom of the sliding guide rail at equal intervals.

[0015] Compared with the prior art, the experimental device for dynamic pitching motion of a model has the following beneficial effects:

[0016] 1. The model connecting piece is connected with the internal connecting rod of the model without increasing flow field disturbance, and when the two drivers drive the front and rear connectors to increase the spacing, the connecting block on the sliding guide rail generates relative displacement, the cross rail around the front insertion pin and the rear plug screw bolt are driven to realize the pitching motion, and the dynamic pitching motion of the large model is realized.

[0017] 2. The contact pressure between the side surface of the sliding guide rail and the inner side surface of the connecting block is directly detected by the pressure sensor on the arc-shaped plate.

[0018] 3、The application divides the original whole sliding guide rail into two adjustable ends, avoids the need to replace the whole sliding guide rail when one end of the sliding guide rail is damaged during use, scrapes off impurities or evenly applies lubricating grease to the connection area of the sliding guide rail and the connecting block through the scraper when the two groups of sliding rods drive the sliding guide rail away from the connecting block, judges the flatness through the scanning of the surface of the connecting part by the distance sensor on the detection plate, loses the extrusion of the ball to the insertion rod, loses the outward thrust of the insertion rod to the arc-shaped plate, and loses the restriction of the arc-shaped plate to the insertion hole in the sliding guide rail, so that the rear connector can maintain the original state to maintain and disassemble the sliding guide rail, so that the use state of the rear connector and the sliding guide rail after the subsequent maintenance and replacement of the sliding guide rail is consistent with the initial state of maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0020] Figure 1 is a three-dimensional structure diagram of the present application;

[0021] Figure 2 is an exploded view of each part of the present application;

[0022] Figure 3 is a schematic diagram of the execution cross rail structure of the present application;

[0023] Figure 4 is a schematic diagram of the internal structure of the cavity of the present application;

[0024] Figure 5 is a schematic diagram of the scraper structure of the present application;

[0025] Figure 6 is a schematic diagram of the two-way threaded drive shaft connecting structure of the present application;

[0026] Figure 7 is the A-A sectional view in Figure 6 .

[0027] In the figure: 1, driver; 2, front connector; 3, model connecting piece; 4, model; 5, plug pin; 6, execution cross rail; 7, connecting block; 8, sliding guide rail; 9, rear connector; 10, plug bolt and nut; 11, rolling bearing;

[0028] 61, cavity; 62, drive motor; 63, worm gear set; 64, two-way threaded drive shaft; 65, sliding rod; 66, connecting rack; 67, linear slide rail;

[0029] 651, drive gear; 652, matching hollow cylinder; 653, drive screw; 654, engaging column; 655, ball; 656, insertion rod; 657, arc plate;

[0030] 671, scraper; 672, detection plate. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0032] Please refer to Figure 1 - Figure 7 An experimental device for dynamic pitching motion of a model in the embodiment, which is composed of two groups of drivers 1, a front connector 2, a model connector 3, a bolt 5, two groups of execution cross rails 6, two groups of connecting blocks 7, sliding guide rails 8, and a rear connector 9.

[0033] The two groups of drivers 1 are connected with the front connector 2 and the rear connector 9 respectively, and the driver 1 drives the driver 1 and the rear connector 9 to move linearly up and down.

[0034] Further, as shown in Figures 1-7 , the front connector 2 is connected with the front ends of the two groups of execution cross rails 6 through the bolt 5 and is placed in the device connector and fastened by threads, and the rear connector 9 is connected and fixed with the two groups of connecting blocks 7 through the jam bolt and the nut 10; the bolt 5, the front connector 2, the jam bolt 10, and the rear connector 9 are connected by the rolling bearing 11.

[0035] Meanwhile, as shown in Figures 1-7 , the two groups of connecting blocks 7 are connected with the sliding guide rails 8 at the rear ends of the two groups of execution cross rails 6 respectively; when the two groups of drivers 1 drive the front connector 2 and the rear connector 9 to increase the spacing, the connecting blocks 7 on the sliding guide rails 8 produce relative displacement, and the execution cross rails 6 realize the pitching motion of the model 4 by rotating around the bolt 5 at the front end and the jam bolt 10 at the rear end; the range of the sliding guide rail 8 is determined according to the motion range of the driver, and is designed to be 1.5 times the sliding range to ensure sufficient safety margin; the bottom of the sliding guide rail 8 is provided with a plurality of insertion holes, and the matching hollow cylinder 652 is connected with the insertion holes.

[0036] Further, as shown in Figures 1-7As shown, the model connecting piece 3 is threadedly fastened with the execution cross rail 6 without relative sliding during movement; a cavity 61 is arranged in the end of the execution cross rail 6 away from the model connecting piece 3; a driving motor 62 is threadedly connected in the cavity 61; a worm and gear set 63 is fixedly connected to the output shaft of the driving motor 62; a bidirectional threaded driving shaft 64 is fixedly connected to the center of the worm of the worm and gear set 63; a sliding rod 65 is threadedly connected to the side wall of the bidirectional threaded driving shaft 64;

[0037] A connecting rack 66 is fixedly connected to the side wall of the cavity 61; a linear sliding rail 67 is fixedly connected to the top of the execution cross rail 6; a scraper 671 is fixedly connected to the sliding end of the linear sliding rail 67; a detection plate 672 is connected to the side wall of the scraper 671; a plurality of distance sensors are arranged on the side wall of the detection plate 672; the curvature of the side wall of the scraper 671 is matched with the connection region of the sliding guide rail 8 and the connecting block 7.

[0038] The hollow cylinder 652 drives the two groups of sliding guide rails 8 to move to adjust the distance, and the distance between the two groups of sliding guide rails 8 is reduced, so that the side surface of the sliding guide rail 8 is out of contact with the inner side surface of the connecting block 7, the sliding guide rail 8 loses the limitation of the connecting block 7, and the connecting block 7 can be separated from the sliding guide rail 8.

[0039] In addition, the distance between the connecting block 7 and the sliding guide rail 8 is expanded to match the sliding of the scraper 671 and the detection plate 672, the linear sliding rail 67 drives the scraper 671 to move, and the scraper 671 scrapes or evenly spreads the lubricating oil on the surface of the connection between the sliding guide rail 8 and the connecting block 7; at the same time, the distance sensors on the detection plate 672 can detect whether the surface of the connection between the sliding guide rail 8 and the connecting block 7 is flat.

[0040] When the distance between the two groups of sliding guide rails 8 is increased, the side surface of the sliding guide rail 8 is in contact with the inner side surface of the connecting block 7, and the thrust generated when the connecting block 7 is in contact with the sliding guide rail 8 can be detected by the pressure sensor on the arc-shaped plate 657; when the connection between the connecting block 7 and the sliding guide rail 8 is worn, the sliding gap between them is increased, so that the force applied by the connecting block 7 to the sliding guide rail 8 is changed, and the change of the value is monitored by the pressure sensor to monitor the wear of the connecting block 7 to the sliding guide rail 8.

[0041] Further, as shown in FIG. 6, the connecting block 7 is provided with a plurality of arc-shaped plates 657, and the arc-shaped plates 657 are arranged on the side wall of the connecting block 7. Figures 1-7As shown, the driving gear 651 is rotatably connected to the top of the sliding rod 65, the matching hollow cylinder 652 is fixedly connected to the top of the sliding rod 65, the driving lead screw 653 is fixedly connected to the center of the driving gear 651, the connecting column 654 is threadedly connected to the side surface of the driving lead screw 653, the connecting column 654 is slidingly connected in the matching hollow cylinder 652, the ball 655 is fixedly connected to the top of the connecting column 654, the insertion rod 656 is slidingly connected to the side wall of the matching hollow cylinder 652, the insertion rod 656 is fixedly connected to the side wall of the arc-shaped plate 657, and the pressure sensor is arranged on the side surface of the arc-shaped plate 657.

[0042] The control driving motor 62 drives the worm gear set 63 to move, and the worm gear set 63 drives the sliding rod 65 and the matching hollow cylinder 652 to move to the middle area through the bidirectional threaded drive shaft 64.

[0043] When the sliding rod 65 moves, the driving gear 651 meshes with the connecting rack 66, the driving gear 651 drives the driving lead screw 653 to rotate, the driving lead screw 653 drives the connecting column 654 to move, the connecting column 654 drives the ball 655 to move downward, the ball 655 loses the extrusion on the insertion rod 656, the insertion rod 656 loses the outward thrust on the arc-shaped plate 657, the arc-shaped plate 657 loses the limitation on the insertion hole in the sliding guide rail 8, and the sliding guide rail 8 is conveniently disassembled.

[0044] The mounting mode, the connecting mode or the arrangement mode disclosed in the embodiment are all common mechanical connection modes, and as long as the beneficial effects can be achieved, the embodiment can be implemented, so the specific structural components and working principles are not described in detail.

[0045] The mounting mode, the connecting mode or the arrangement mode disclosed in the embodiment are all common mechanical connection modes, and as long as the beneficial effects can be achieved, the embodiment can be implemented, so the specific structural components and working principles are not described in detail.

[0046] It should be noted that, in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0047] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. An experimental apparatus for performing dynamic pitch motion on a model, characterized in that: Includes driver (1), two sets of drivers (1) are connected to the front connector (2) and the rear connector (9) respectively, and driver (1) drives driver (1) and rear connector (9) to make up-down linear motion; The front connector (2) is connected to the front end of the two sets of actuator rails (6) via pins (5) and is inserted into the device connector and fastened with threads. The rear connector (9) is connected and fixed to the two sets of connecting blocks (7) by means of plug bolts and nuts (10); The pin (5) and the front connector (2), as well as the plug bolt (10) and the rear connector (9), are connected by a rolling bearing (11); The two sets of connecting blocks (7) are respectively connected to the sliding guide rails (8) at the rear end of the two sets of execution horizontal rails (6); When the two sets of drivers (1) drive the front connector (2) and the rear connector (9) to increase the gap, the connecting block (7) on the sliding guide (8) generates relative displacement, and the horizontal rail (6) around the front pin (5) and the rear plug bolt (10) realizes the pitch motion of the model (4).

2. The experimental apparatus for dynamic pitch motion of a model according to claim 1, characterized in that: The model connector (3) is threadedly fastened to the execution rail (6), and there is no relative slippage during movement.

3. The experimental device for dynamic pitch motion of a model according to claim 1, characterized in that: A cavity (61) is provided in the end of the execution rail (6) away from the model connector (3); A drive motor (62) is bolted into the cavity (61), a worm gear assembly (63) is fixedly connected to the output shaft of the drive motor (62), and a bidirectional threaded drive shaft (64) is fixedly connected to the center of the worm wheel in the worm gear assembly (63). A sliding rod (65) is threadedly connected to the side wall of the bidirectional threaded drive shaft (64).

4. The experimental device for dynamic pitch motion of a model according to claim 3, characterized in that: A connecting rack (66) is fixedly connected to the side wall of the cavity (61), and a linear slide rail (67) is fixedly connected to the top of the execution horizontal rail (6). A scraper (671) is fixedly connected to the sliding end of the linear slide rail (67). A detection plate (672) is connected to the side wall of the scraper (671). Multiple distance sensors are provided on the side wall of the detection plate (672).

5. The experimental apparatus for dynamic pitch motion of a model according to claim 4, characterized in that: A drive gear (651) is rotatably connected to the top of the sliding rod (65), a mating hollow cylinder (652) is fixedly connected to the top of the sliding rod (65), and a drive screw (653) is fixedly connected to the center of the drive gear (651). A connecting column (654) is threadedly connected to the side of the drive screw (653), and is slidably connected to the connecting column (654) inside the mating hollow cylinder (652).

6. The experimental apparatus for dynamic pitch motion of a model according to claim 5, characterized in that: A sphere (655) is fixedly connected to the top of the connecting column (654), and an insertion rod (656) is slidably connected to the side wall of the hollow cylinder (652). The insertion rod (656) is fixedly connected to the side wall of the arc plate (657), and a pressure sensor is provided on the side of the arc plate (657).

7. The experimental apparatus for dynamic pitch motion of a model according to claim 6, characterized in that: The bottom of the sliding guide rail (8) is provided with multiple sets of insertion holes, which are connected to the hollow cylinder (652).

8. The experimental device for dynamic pitch motion of a model according to claim 3, characterized in that: The cavity (61) is provided with multiple sets of limiting components, including a worm gear assembly (63), a bidirectional threaded drive shaft (64), a sliding rod (65), a connecting rack (66), a linear slide rail (67), a drive gear (651), a mating hollow cylinder (652), a drive screw (653), a connecting column (654), a ball (655), an insertion rod (656), and an arc plate (657).

9. The experimental apparatus for dynamic pitch motion of a model according to claim 6, characterized in that: Multiple sets of hollow cylinders (652) and arc plates (657) are equidistantly connected to the insertion holes at the bottom of the sliding guide rail (8).

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