Experimental device for dynamic pitching motion of model

Abstract

The invention relates to the technical field of experimental fluid mechanics sensors, in particular to an experimental device for a model to do dynamic pitching motion, which consists of a driver, an execution cross rail, a front connector, a rear connector, a bolt, a connecting block, a sliding guide rail and a device connecting piece, the driver is respectively connected with the front connector and the rear connector, the driver drives the front connector and the rear connector to do up-down linear motion, the front end of the execution transverse rail is connected with the front connector through a plug pin, is placed into a model connecting piece and is fastened by threads, and the rear end of the execution transverse rail is connected with two connecting blocks through plug bolts and nuts and is fixed with the rear connector. When the driver drives the front connector and the rear connector to increase the distance, the connecting block on the sliding guide rail generates relative displacement, the execution transverse rail achieves pitching motion around the plug pin at the front end and the plug bolt at the rear end, and the whole device is simple, convenient, low in cost, free of influence on flow field observation and measurement and high in universality.

Description

Technical Field

[0001] The invention relates to the technical field of experimental fluid mechanics sensors, in particular to an experimental device for allowing a model to perform dynamic pitching motion. Background Art

[0002] Dynamic pitching motion is a classic form of unsteady motion, commonly seen in high-maneuverability biological movements such as swimming and flying. To explore the fluid mechanics of high-maneuverability swimming and flight, there is an urgent need for a sensor or device that can simulate pitching motion, achieve stable and reliable pitching motion without adding disturbances to the flow field, and is highly universal, simple, and efficient.

[0003] Therefore, an experimental device for allowing the model to perform dynamic pitching motion is proposed to solve the above problems. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solutions: An experimental device for allowing a model to perform dynamic pitch motion, characterized in that: it includes a driver, two groups of drivers are respectively connected to the front connector and the rear connector, the driver drives the driver and the rear connector to perform up and down linear motion; the front connector is connected to the front end of the two groups of execution rails through a pin and is placed in the device connector and fastened with threads, and the rear connector is connected and fixed to the two groups of connecting blocks through a plug bolt and a nut; the plug bolt and the front connector and the plug bolt and the rear connector are connected by rolling bearings; the two groups of connecting blocks are respectively connected to the sliding guide rails at the rear end of the two groups of execution rails; when the two groups of drivers drive the front connector and the rear connector to increase the spacing, the connecting blocks on the sliding guide rails produce relative displacement, and the execution rails realize the pitch motion of the model around the pin at the front end and the plug bolt at the rear end.

[0005] Preferably, the model connecting piece is threadedly fastened to the execution rail, and there is no relative slippage during movement.

[0006] Preferably, a cavity is provided in one end of the execution rail away from the model connection piece; The bolts are connected to the driving motor in the cavity, the worm gear group is fixedly connected to the output shaft of the driving motor, the bidirectional threaded driving shaft is fixedly connected to the center of the worm wheel in the worm gear group, and the side wall of the bidirectional threaded driving shaft is threadedly connected with a sliding rod.

[0007] Preferably, a connecting rack is fixedly connected to the side wall of the cavity, a linear slide is fixedly connected to the top of the execution rail, the sliding end of the linear slide is fixedly connected to a scraper, the side wall of the scraper is connected to a detection plate, and the side wall of the detection plate is provided with multiple groups of distance sensors.

[0008] Preferably, 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 is fixedly connected to the center of the driving gear, and the side of the driving screw is threadedly connected to the connecting column, which is slidably connected to the connecting column in the matching hollow cylinder.

[0009] Preferably, the sphere fixedly connected to the top of the connecting column is slidably connected to the side wall of the hollow cylinder with an insertion rod, the insertion rod is fixedly connected to the side wall of the arc plate, and a pressure sensor is provided on the side of the arc plate.

[0010] Preferably, a plurality of groups of insertion holes are provided at the bottom of the sliding guide rail, and the hollow cylinders are connected to the insertion holes.

[0011] Preferably, multiple groups of limiting components are provided in the cavity, and the limiting components include a worm gear group, a bidirectional threaded drive shaft, a sliding rod, a connecting rack, a linear slide rail, a driving gear, a matching hollow cylinder, a driving screw, a connecting column, a sphere, an insertion rod, and an arc plate.

[0012] Preferably, multiple sets of matching hollow cylinders and arc-shaped plates are connected to the insertion holes at the bottom of the sliding guide rail at equal distances.

[0013] Compared with the prior art, the present invention provides an experimental device for a model to perform dynamic pitching motion, which has the following beneficial effects: 1. The present invention is connected to the model's internal connecting rod only through the model connector without increasing the flow field disturbance. When the two drivers drive the front and rear connectors to increase the spacing, the connecting blocks on the sliding guide rails produce relative displacement, and the execution rails achieve pitch motion around the front pin and the rear plug bolt, thereby realizing dynamic pitch motion of the large model. The entire device is simple, stable, convenient, efficient, low-cost, and has strong universality.

[0014] 2. The present invention detects the contact pressure between the side surface of the sliding guide rail and the inner surface of the connecting block directly through the pressure sensor on the arc plate; when the gap changes, the thrust value detected by the pressure sensor continues to decrease or fluctuates, and the system monitors the degree of wear through the change in the pressure sensor value.

[0015] 3. The present invention divides the original entire sliding guide rail into two adjustable ends, so as to avoid the need to replace the entire sliding guide rail after one end of the sliding guide rail is damaged during use; when the two sets of sliding rods drive the sliding guide rail away from the connecting block, the scraper is attached to the connection area between the sliding guide rail and the connecting block to scrape off impurities or evenly apply grease, and the distance sensor on the detection plate determines the flatness by scanning the surface of the connection; the sphere loses the squeezing of the insertion rod, so that the insertion rod loses the outward thrust on the arc plate, and the arc plate loses the restriction on the insertion hole in the sliding guide rail, which makes it convenient for the rear connector to maintain the original state for maintenance and disassembly of the sliding guide rail, so that after the subsequent maintenance and replacement of the sliding guide rail, the use state of the rear connector and the sliding guide rail is consistent with the initial state of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a three-dimensional structural diagram of the present invention; Figure 2 Exploded view of the components of the present invention; Figure 3 This is a schematic diagram of the execution rail structure of the present invention; Figure 4 Schematic diagram of the structure inside the cavity of the present invention; Figure 5 It is a schematic diagram of the scraper structure of the present invention; Figure 6 This is a schematic diagram of the bidirectional threaded drive shaft connection structure of the present invention; Figure 7 For the present invention Figure 6 AA section view in.

[0017] Figure: 1. Driver; 2. Front connector; 3. Model connector; 4. Model; 5. Latch; 6. Actuator rail; 7. Connecting block; 8. Sliding guide rail; 9. Rear connector; 10. Bolt and nut; 11. Rolling bearing. 61. Cavity; 62. Drive motor; 63. Worm gear assembly; 64. Bidirectional threaded drive shaft; 65. Sliding rod; 66. Connecting rack; 67. Linear guide rail; 651, driving gear; 652, matching hollow cylinder; 653, driving screw; 654, connecting column; 655, sphere; 656, insertion rod; 657, curved plate; 671. Scraper; 672. Inspection board. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1 - Figure 7 In this embodiment, an experimental device for a model to perform dynamic pitch motion is provided. The device is composed of two sets of drivers 1, a front connector 2, a model connector 3, a latch 5, two sets of execution rails 6, two sets of connection blocks 7, a sliding guide rail 8, and a rear connector 9.

[0020] The two sets of drivers 1 are connected to the front connector 2 and the rear connector 9 respectively, and the drivers 1 drive the drivers 1 and the rear connector 9 to perform vertical linear motion.

[0021] Further, such as Figure 1-Figure 7 As shown, the front connector 2 is connected to the front ends of the two sets of execution rails 6 through the pin 5 and is placed in the device connector and fastened with threads. The rear connector 9 is connected and fixed to the two sets of connection blocks 7 through the plug bolts and nuts 10; the pin 5 and the front connector 2 and the plug bolts 10 and the rear connector 9 are connected by rolling bearings 11.

[0022] At the same time, if Figure 1-Figure 7 As shown, the two groups of connecting blocks 7 are respectively connected to the sliding guide rails 8 at the rear ends of the two groups of execution rails 6; 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 rails 6 realize the pitch movement of the model 4 around the front pin 5 and the rear end plug bolt 10; the range of the sliding guide rail 8 is determined according to the driver movement range, and is formulated at 1.5 times the sliding range to ensure sufficient safety margin; a plurality of groups of insertion holes are provided at the bottom of the sliding guide rail 8, which are connected with the insertion holes in conjunction with the hollow cylinder 652.

[0023] Further, if Figure 1-Figure 7 As shown, the model connecting member 3 is threadedly fastened to the execution rail 6, and there is no relative slippage during movement; a cavity 61 is provided in the end of the execution rail 6 away from the model connecting member 3; a drive motor 62 is bolted to 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, and a sliding rod 65 is threadedly connected to the side wall of the bidirectional threaded drive shaft 64; A connecting rack 66 is fixedly connected to the side wall of the cavity 61, and a linear slide 67 is fixedly connected to the top of the execution rail 6. The sliding end of the linear slide 67 is fixedly connected to a scraper 671, and the side wall of the scraper 671 is connected to a detection plate 672. The side wall of the detection plate 672 is provided with multiple groups of distance sensors; the curvature of the side walls of the scraper 671 and the detection plate 672 coincides with the connection area between the sliding guide rail 8 and the connecting block 7.

[0024] The hollow cylinder 652 cooperates with the two sets of sliding guide rails 8 to move and adjust the spacing. The spacing between the two sets of sliding guide rails 8 is reduced, so that the contact between the side surfaces of the sliding guide rails 8 and the inner surface of the connecting block 7 disappears. The sliding guide rails 8 lose their restraint on the connecting block 7, allowing the connecting block 7 to detach from the sliding guide rails 8. In addition, the distance between the connecting block 7 and the sliding guide rail 8 is expanded to meet the sliding of the scraper 671 and the detection plate 672, and the linear slide 67 is controlled to drive the scraper 671 to move. The scraper 671 scrapes the connection between the sliding guide rail 8 and the connecting block 7 or evenly spreads the lubricating grease on the connection surface between the sliding guide rail 8 and the connecting block 7. At the same time, the distance sensor on the detection plate 672 can be used to detect whether the surface of the connection between the sliding guide rail 8 and the connecting block 7 is flat. When the distance between the two sets of sliding guide rails 8 increases, the side surface of the sliding guide rail 8 contacts the inner surface of the connecting block 7. The thrust generated when the connecting block 7 contacts the sliding guide rail 8 can be detected by the pressure sensor on the arc plate 657. When wear occurs at the connection between the connecting block 7 and the sliding guide rail 8, the sliding gap between them increases, causing the force applied to the sliding guide rail 8 by the connecting block 7 to change. The value change is monitored by the pressure sensor to monitor the wear applied to the sliding guide rail 8 by the connecting block 7.

[0025] Furthermore, Figure 1-Figure 7 As shown, a driving gear 651 is rotatably connected to the top of the sliding rod 65, a matching hollow cylinder 652 is fixedly connected to the top of the sliding rod 65, a driving screw 653 is fixedly connected to the center of the driving gear 651, a connecting column 654 is threadedly connected to the side of the driving screw 653, and the connecting column 654 is slidably connected to the connecting column 654 in the matching hollow cylinder 652, 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 matching hollow cylinder 652, and 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.

[0026] The control driving motor 62 drives the worm gear set 63 to operate, and the worm gear set 63 drives the sliding rod 65 and the matching hollow cylinder 652 to move toward the middle area through the bidirectional threaded driving shaft 64; When the sliding rod 65 moves, the driving gear 651 engages with the connecting rack 66, the driving gear 651 drives the driving screw 653 to rotate, the driving screw 653 drives the connecting column 654 to move, and the connecting column 654 drives the ball 655 downward to move. The ball 655 loses the squeezing of the insertion rod 656, causing the insertion rod 656 to lose the outward thrust on the arc plate 657, and the arc plate 657 also loses the restriction on the insertion hole in the sliding guide rail 8, making it convenient for the subsequent disassembly of the sliding guide rail 8.

[0027] The installation method, connection method or setting method disclosed in this embodiment are all common mechanical connection methods. Any connection method can be implemented as long as it can achieve its beneficial effects, so the specific structural composition and working principle will not be described in detail in this embodiment.

[0028] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An experimental device for a model to perform dynamic pitching motion, characterized by: The device comprises a driver (1), wherein two sets of drivers (1) are respectively connected to the front connector (2) and the rear connector (9), and the driver (1) drives the driver (1) and the rear connector (9) to perform vertical linear motion; The front connector (2) is connected to the front ends of the two sets of execution rails (6) through the latch (5) and is placed in the device connector and fastened with threads. The rear connector (9) is connected and fixed to the two sets of connection blocks (7) by plugging bolts and nuts (10); The latch (5) and the front connector (2) as well as the plug bolt (10) and the rear connector (9) are connected by rolling bearings (11); The two sets of connecting blocks (7) are respectively connected to the sliding guide rails (8) at the rear ends of the two sets of execution cross rails (6); When the two sets of drivers (1) drive the front connector (2) and the rear connector (9) to increase the distance between them, the connecting block (7) on the sliding guide rail (8) produces relative displacement, and the execution rail (6) realizes the pitch motion of the model (4) around the front pin (5) and the rear plug bolt (10).

2. The experimental device for allowing a model to perform dynamic pitching motion according to claim 1, characterized in that: The model connecting piece (3) and the execution cross rail (6) are screw-fastened, and there is no relative slippage during movement.

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

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

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

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

7. The experimental device for allowing a model to perform dynamic pitching motion according to claim 1, characterized in that: The bottom of the sliding guide rail (8) is provided with a plurality of groups of insertion holes, which are matched with the hollow cylinder (652) and connected with the insertion holes.

8. The experimental device for allowing a model to perform dynamic pitching motion according to claim 1, characterized in that: A plurality of limiting components are provided in the cavity (61), and the limiting components include 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 driving gear (651), a matching hollow cylinder (652), a driving screw (653), a connecting column (654), a sphere (655), an insertion rod (656), and an arc plate (657).

9. The experimental device for allowing a model to perform dynamic pitching motion according to claim 6, characterized in that: A plurality of sets of matching hollow cylinders (652) and arc-shaped plates (657) are connected to the insertion holes at the bottom of the sliding guide rail (8) at equal distances.

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