Adjustable clamping device and ice wind tunnel test system

Abstract

The application belongs to the technical field of aerospace, and particularly relates to an adjustable clamping device and an ice wind tunnel test system, which comprises a first support and a second support arranged at intervals, a first rod body and a second rod body arranged between the first support and the second support, the first rod body and the second rod body being arranged in parallel, a third rod body erected between the first rod body and the second rod body, the angle of the third rod body relative to the first rod body and the second rod body being adjustable, and an inclination angle adjusting assembly arranged on the third rod body, the output end of the inclination angle adjusting assembly being provided with a first connecting piece for detachable connection with a test piece. The application adopts a mode of mainly supporting from the bottom and secondarily supporting from the side, effectively guarantees the integrity of the flow field environment and the test section structure, has a simple structure, is easy to disassemble and assemble, is convenient to adjust the yaw angle and the trim angle, has strong supporting force, good stability, strong practicability, and is worth promoting.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aerospace, and particularly relates to an adjustable clamping device and an ice wind tunnel test system. BACKGROUND

[0002] The polar region is rich in natural resources, which plays an important role in the sustainable development of the world's future economy and society. According to a latest assessment report published by the United States Geological Survey, the Arctic has 13% of the world's unproven oil reserves, 30% of the world's undeveloped natural gas reserves and 9% of the world's coal resources. The polar research ship is a key basic equipment for polar exploration, polar shipping and polar resource exploitation.

[0003] However, the weather conditions and natural environment in the polar region are harsh, which brings great risks and challenges to ships sailing in the polar sea, one of which is ship icing. The winter in the Arctic region lasts for a long time, with a temperature of-43 to-26℃ and an average temperature of-34℃. The sea-air exchange is strong, and the humidity is very high, with a relative humidity of more than 95% most of the time, which is characterized by fog and heavy fog. The ice formed under such extreme climate has a great impact on polar sailing ships and offshore platforms. The sea water splashing on the polar sailing ship is the main reason for the ice formation on the ship body and deck, and the supercooled droplets in the atmosphere also form a large amount of ice on the surface of the structure when they encounter the equipment. Ship icing can affect the stability of the ship and threaten the safety of the crew on board, and also cause related equipment on the ship to malfunction or fail. When the ice is located on the superstructure of the ship, it will increase the wind area of the ship, making the steady wind moment of the ship increase. When the ice is located on the deck of the ship, it will reduce the remaining buoyancy of the ship. When the ice is asymmetrically located on the surface of the ship, it will cause the ship to produce a static inclination angle, reduce the righting lever of the ship, cause the ship to tilt, and damage the maneuverability of the ship, and in severe cases, can cause the ship to capsize and sink. According to the AMSA 2009 report, there were 293 maritime traffic accidents in the Arctic Ocean area between 1995 and 2005. The SDC4 meeting of the International Maritime Organization (IMO) in 2006 recorded 21 accidents in the polar region since 2007, of which 6 accidents were closely related to icing. Low-temperature icing tests can explore the icing mechanism of polar ships, and then effective measures can be taken to reduce the harm caused by icing of polar ships and improve the safety of polar ships.

[0004] The icing wind tunnel can simulate the environment during the sailing process of the polar ship, and is a commonly used low-temperature icing test device. In the icing wind tunnel test, the most important thing is to ensure the stability of the test piece support and the integrity of the flow field. If the test piece clamping device affects the integrity of the flow field, it will cause a large error in the test results.

[0005] Most of the existing clamping devices adopt the way of fixing and connecting device by punching holes in the bottom, but such setting of clamping device has poor stability and can damage the flow field environment and the structure of the icing wind tunnel test section, thereby shortening the service life of the icing wind tunnel. SUMMARY

[0006] Therefore, the application provides an adjustable clamping device and an icing wind tunnel test system to solve the problems in the prior art.

[0007] The technical scheme of the application is as follows:

[0008] An adjustable clamping device comprises:

[0009] First and second supports are arranged at intervals.

[0010] First and second rods are arranged between the first and second supports, and the first and second rods are arranged in parallel.

[0011] A third rod is arranged between the first and second rods, and the angle of the third rod relative to the first and second rods is adjustable.

[0012] An inclination adjusting assembly is arranged on the third rod, and the output end of the inclination adjusting assembly is provided with a first connecting piece for detachable connection with a test piece.

[0013] Further, the third rod comprises a rod with a rectangular cross section, two ends of the rod are respectively provided with mounting holes one, and the mounting holes one are provided with second connecting pieces for connection with the first and second rods; at least one mounting hole two is arranged in the middle of the third rod, and the mounting hole two is provided with a third connecting piece for connection with the inclination adjusting assembly.

[0014] Further, the third rod has a plurality of third rods, and the distance between the two mounting holes one on each third rod is different.

[0015] Further, the inclination adjusting assembly comprises two groups of height adjusting assemblies arranged at intervals, the fixed part of the height adjusting assembly is connected with the third rod, and the moving part of the height adjusting assembly is connected with the first connecting piece.

[0016] Further, the height adjusting assembly comprises a controllable gas spring, one end of the controllable gas spring is fixedly connected with a support, the support is fixedly connected with the third rod, and the other end of the controllable gas spring is connected with the first connecting piece.

[0017] Further, the second support has the same structure as the first support, the first support comprises a vertical plate, two fourth rods are arranged on one side of the vertical plate, the two fourth rods are arranged at an acute angle, one end of the two fourth rods is fixedly connected with the vertical plate, and the other end of the two fourth rods is fixedly connected with the first rod and the second rod respectively.

[0018] Further, the fifth rod is arranged between the two fourth rods and fixedly connected with the two fourth rods at two ends.

[0019] An ice wind tunnel test system comprises the adjustable clamping device.

[0020] Further, the adjustable clamping device comprises:

[0021] The support rod is arranged on the vertical plate of the first support, and the first clamping assembly for fixing the relative positions of the support rod and the support hole on the wall is connected to the support rod.

[0022] The connecting rod is arranged on the vertical plate of the second support, and the second clamping assembly for fixing the relative positions of the connecting rod and the detection hole is connected to the connecting rod.

[0023] The adjustable clamping device and the ice wind tunnel test system have the following beneficial effects:

[0024] 1. The position of the test piece is not changed during replacement of the test piece and the test process, calibration is not required, and test errors caused by changes in the position of the test piece can be eliminated.

[0025] 2. The first support and the second support adopt a triangular configuration, are simple in structure and stable in support, and adopt a mode in which bottom support is mainly used and side support is used as auxiliary, so that the integrity of the flow field environment and the test section structure is effectively ensured.

[0026] 3. The third rod is replaced to change the yaw angle, errors caused by changes in the yaw angle in multiple tests are eliminated, the yaw angle does not need to be calibrated before each test, the test efficiency is improved, the device has high practicability, and is worth promoting. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 It is a structural schematic diagram of the present application.

[0028] Fig. 2 It is a structural schematic diagram of the present application in a working state.

[0029] Fig. 3 It is a partial structural schematic diagram of the present application. DETAILED DESCRIPTION

[0030] The application provides an adjustable clamping device and an ice wind tunnel test system. Figs. 1 to 3 The application will be described below with reference to the structural schematic view of the application.

[0031] Embodiment 1

[0032] The adjustable clamping device provided by the application, as shown in the drawings, comprises a first support and a second support arranged at intervals, a first rod body 6 and a second rod body 7 arranged between the first support and the second support and used for connecting, the first rod body 6 and the second rod body 7 are arranged in parallel, a third rod body 8 is arranged between the first rod body 6 and the second rod body 7, the angle of the third rod body 8 relative to the first rod body 6 and the second rod body 7 is adjustable, an inclination angle adjusting assembly is arranged on the third rod body 8, and an output end of the inclination angle adjusting assembly is provided with a first connecting piece 11 used for detachable connection with a test piece. Fig. 1 The first support and the second support are connected with the first rod body 6 and the second rod body 7 through bolts respectively.

[0033] Further, as shown in the drawings, the third rod body 8 comprises a rod with a rectangular cross section, mounting holes one are arranged at two ends of the rod respectively, and a second connecting piece used for connection with the first rod body 6 or the second rod body 7 is arranged in the mounting hole one.

[0034] Fig. 3 Further, at least one mounting hole two is arranged in the middle of the third rod body 8, and a third connecting piece used for connection with the inclination angle adjusting assembly is arranged in the mounting hole two.

[0035] Further, the third rod body 8 has a plurality of the third rod bodies 8, and the distance between the two mounting holes one on each third rod body 8 is different, thereby forming a plurality of distance-selectable specifications.

[0036] Further, the inclination angle adjusting assembly comprises two groups of height adjusting assemblies arranged at intervals, a fixed piece of the height adjusting assembly is connected with the third rod body 8, and a moving piece of the height adjusting assembly is connected with the first connecting piece 11.

[0037] Further, the height adjusting assembly comprises a controllable gas spring 9, one end of the controllable gas spring 9 is fixedly connected with a support 10, the support 10 is fixedly connected with the third rod body 8, and the other end of the controllable gas spring 9 is connected with the first connecting piece 11. Two controllable gas springs 9 are arranged at the same time, so that the test piece is more stable, and negative effects caused by instability of the test piece during the test are prevented.

[0038] ​Furthermore, the second bracket has the same structure as the first bracket. The first bracket includes a vertical plate 2, and two fourth rods 4 are provided on one side of the vertical plate 2. The two fourth rods 4 are arranged at an acute angle. One end of each of the two fourth rods 4 is fixedly connected to the washer 3 and the vertical plate 2 by bolts. The other end of each of the two fourth rods 4 is fixedly connected to the first rod 6 and the second rod 7 respectively.

[0039] Furthermore, to enhance its rigidity, a fifth rod 5 is also erected between the two fourth rods 4. The two ends of the fifth rod 5 are fixedly connected to the two fourth rods 4 respectively, forming a stable triangular configuration to ensure the stability of the overall structure.

[0040] Example 2

[0041] The present invention provides an ice wind tunnel testing system, including the aforementioned adjustable clamping device, wherein the adjustable clamping device is located in the ice wind tunnel.

[0042] Furthermore, such as Fig. 2 As shown, to facilitate connection with the test section 14 of the ice tunnel, a support hole 15 is provided on the outer wall of one side of the test section 14, and a probe hole 16 is provided on the outer wall of the other side of the test section 14. A support rod 1 that can pass through the support hole 15 on the wall is provided on the upright plate 2 of the first support. A first snap-fit ​​assembly for fixing the relative position of the support rod 1 and the support hole 15 on the wall is connected to the support rod 1. A connecting rod that can pass through the probe hole 16 is provided on the upright plate 2 of the second support. After passing through the probe hole 16, a second snap-fit ​​assembly for fixing the relative position of the connecting rod and the probe hole 16 is connected to its end.

[0043] Both the first and second snap-fit ​​components use snap-fit ​​kits 12.

[0044] When testing a scaled-down ship model using the ice tunnel testing system provided by this invention, the scaled-down ship model is first clamped in place using the adjustable clamping device provided by this invention and placed in the test section 14 of the ice tunnel. The adjustable clamping device is mainly supported by the bottom of the test section 14. The upright plate 2 on the first support is mainly supported by the support holes 15 through the support rods 1, and the upright plate 2 on the second support is mainly supported laterally by the connecting rods. The three main support points together ensure the stability of the support device. The triangular configuration of the first and second supports ensures the stability and reliability of the support frame. A controllable gas spring 9, adjusted to a suitable height, is used to support the scaled-down ship model.

[0045] The controllable gas spring 9 controls the stroke by opening and closing the valve, allowing the stroke to stop at any position to meet different height and tilt angle requirements during the test.

[0046] The distance between the two mounting holes on the third rod 8 can be selected in various specifications. The distance between the two mounting holes can be designed according to the required bow angle to make it suitable for various environments and working conditions.

[0047] When the bow roll angle needs to be adjusted, the length of the third rod 8 is replaced and fixed with the corresponding hole; when the pitch angle needs to be adjusted, it is achieved by adjusting the different heights of the two controllable gas springs 9.

[0048] The working process of this invention:

[0049] Before the test, the device is assembled. The bottom of the scaled-down ship model and the first connecting piece 11 are fixed with bolts. Then, the height of the controllable gas spring 9 is adjusted so that the scaled-down ship model is centered in the height direction of the test section 14. The upright plate 2 on the first bracket is connected to the support rod 1. The support rod 1 is then inserted into the support hole 15 on the wall of the test section 14 so that the side support frame is close to the wall of the test section 14 as a reference surface for determining the position of the test piece. The box door on the test section 14 is closed. The buckle kit 12 is inserted into the probe hole 16 to lock the connecting rod on the upright plate 2 on the second bracket to fix the side support frame laterally to prevent it from shifting during the test. Under the premise of ensuring the stability of the support device, the ice tunnel can be opened to start the test.

[0050] During the experiment, if the pitch angle needs to be changed, the lengths of the two controllable gas springs 9 can be changed directly according to the angle requirements to obtain the desired pitch angle; if the yaw angle needs to be changed, the third rod 8 of different specifications can be replaced to obtain the desired yaw angle.

[0051] When using the device provided by this invention for the first time, the length of the controllable gas spring 9 needs to be adjusted according to the height required for the test. In subsequent tests, only the test piece needs to be replaced.

[0052] This invention provides an adjustable clamping device and ice tunnel testing system. It employs a bottom-supported primary structure supplemented by side support frames, effectively ensuring the integrity of the flow field environment and the test section structure. The main structure is purely mechanical; the third rod can be directly replaced to adjust the bow roll angle, meeting the testing requirements for different bow roll angles. The entire device has a simple structure, is easy to disassemble and install, facilitates adjustment of the bow roll and pitch angles, provides strong support, good stability, and is highly practical, making it worthy of widespread application.

[0053] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An adjustable clamping device, characterized in that, include: The first and second supports are set at intervals; The first rod (6) and the second rod (7) are arranged between the first support and the second support, and the first rod (6) and the second rod (7) are arranged in parallel. The third rod (8) is erected between the first rod (6) and the second rod (7), and the angle of the third rod (8) relative to the first rod (6) and the second rod (7) is adjustable; An inclination adjustment assembly is provided on the third rod (8), and the output end of the inclination adjustment assembly is provided with a first connector (11) for detachable connection with the test piece; The second support has the same structure as the first support. The first support includes a vertical plate (2). Two fourth rods (4) are provided on one side of the vertical plate (2). The two fourth rods (4) are arranged at an acute angle. One end of each of the two fourth rods (4) is fixedly connected to the vertical plate (2). The other ends of the two fourth rods (4) are fixedly connected to the first rod (6) and the second rod (7) respectively. It also includes a fifth rod (5), which is disposed between two fourth rods (4) and its two ends are fixedly connected to the two fourth rods (4) respectively.

2. The adjustable clamping device according to claim 1, characterized in that, The third rod (8) includes a rod with a rectangular cross section. The two ends of the rod are respectively provided with mounting holes one. A second connector for connecting with the first rod (6) and the second rod (7) is inserted through the mounting holes one. The third rod (8) is provided with at least one mounting hole two in the middle. A third connector for connecting with the tilt adjustment assembly is inserted through the mounting hole two.

3. The adjustable clamping device according to claim 2, characterized in that, There are multiple third rods (8), and the distance between the two mounting holes on each third rod (8) is different.

4. The adjustable clamping device according to claim 1, characterized in that, The tilt adjustment assembly includes two sets of height adjustment assemblies spaced apart. The fixing part of the height adjustment assembly is connected to the third rod (8), and the moving part of the height adjustment assembly is connected to the first connecting part (11).

5. An adjustable clamping device according to claim 4, characterized in that, The height adjustment assembly includes a controllable gas spring (9), one end of which is fixedly connected to a support (10), the support (10) is fixedly connected to a third rod (8), and the other end of the controllable gas spring (9) is connected to a first connector (11).

6. An ice wind tunnel testing system, comprising an adjustable clamping device as described in any one of claims 1 to 5, wherein the adjustable clamping device is located in the ice wind tunnel.

7. The ice wind tunnel testing system according to claim 6, characterized in that, Also includes: A support rod (1) is set on the upright plate (2) on the first bracket. A first snap-fit ​​assembly is connected to the support rod (1) to fix the relative position of the support rod (1) and the support hole (15) on the wall. A connecting rod is mounted on a vertical plate (2) on the second bracket, and a second snap-fit ​​assembly is connected to the connecting rod to fix the relative position of the connecting rod and the probe hole (16).

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