A test device for bionic wall fluid resistance for realizing multi-angle jet

Abstract

The present invention discloses a test device for realizing bionic wall fluid resistance of multi-angle jet, comprising a power transmission device, a test device, an angle adjustment device, a water supply device, an auxiliary device and a test platform, wherein one end of the power transmission device is connected to one end of the test device, and the other end of the test device is connected to the water supply device, and the test device is installed on the angle adjustment device. The beneficial effects of the present invention are: small size, compact and simple structure, low cost, simple operation, strong test performance, not limited by the surrounding test environment, and convenient loading and unloading of jet wall test samples, etc., which can meet the requirements of jet wall test samples with jet holes of different shapes.

Description

Technical Field

[0001] The invention relates to a fluid resistance testing device, in particular to a bionic wall fluid resistance testing device for realizing multi-angle jetting. Background Art

[0002] In recent years, with the increasing severity of energy consumption, energy problems have become a problem that the world must face and solve, and energy conservation and consumption reduction are imminent. Reducing the resistance of an object can reduce energy consumption and improve energy utilization. The research on drag reduction technology not only has high military value, but also has extensive economic value. It has always been one of the hot issues that domestic and foreign scientific researchers have devoted themselves to studying. The surface friction resistance of conventional surface ships accounts for about 50% of the total resistance, and the surface friction resistance of underwater vehicles even accounts for 70% of the total resistance. In the long-distance transportation of natural gas and oil, the power of the pump station is almost entirely used to overcome the surface friction resistance of the fluid. According to theoretical calculations, under certain conditions of power and energy, assuming that the resistance of the underwater vehicle is reduced by 10%, its cruising speed and range can be increased by about 3.57% at the same time; in addition, even if only a small drag reduction effect can be obtained, a large amount of energy can be saved every year, which is extremely important for alleviating the current increasingly severe energy crisis. Therefore, the research on drag reduction technology is of great significance for reducing energy consumption, reducing the power of oil and gas pipeline transportation, increasing the speed of transportation equipment such as ships and aircraft, improving military combat capabilities, and increasing the range of high-rise fire-fighting water cannons.

[0003] The devices used to study drag-reducing walls are basically water tunnels, water troughs, and wind tunnels. However, these devices still have many limitations, such as large space, high cost, cumbersome operation, high skill requirements for operators, high test conditions, and the inability to conduct tests anytime and anywhere. These factors make them difficult to popularize in ordinary laboratories. Therefore, in the study of the drag-reducing characteristics of drag-reducing surfaces, a set of small, low-cost and multi-functional test devices is urgently needed. Summary of the invention

[0004] In view of the problems that existing fluid resistance testing devices occupy a large area, have high costs, are complicated to operate, are difficult to load and unload, and have limited functions, the present invention proposes a testing device for bionic wall fluid resistance that realizes multi-angle jets.

[0005] The technical solution of the present invention is as follows:

[0006] A testing device for bionic wall fluid resistance of multi-angle jet is characterized in that it includes a power transmission device, a test device, an angle adjustment device, a water supply device and a test platform, one end of the power transmission device is transmission-connected to one end of the test device, the other end of the test device is connected to the water supply device, and the test device is fixedly arranged on the angle adjustment device, thereby realizing multi-angle adjustment of the test device.

[0007] The test device for realizing bionic wall fluid resistance of multi-angle jet is characterized in that the power transmission device includes a motor, a first coupling, a sensor support, a torque sensor, a second coupling, a power shaft, a first bearing left end cover, a first sleeve, a small rib plate and a first bearing right end cover, the motor, the sensor support and the small rib plate are respectively fixed on the test platform, the output shaft of the motor is connected to the torque sensor through the first coupling, the torque sensor is fixedly installed on the upper end of the sensor support, the other end of the torque sensor is connected to the power shaft through the second coupling, and the power shaft is passed through the cylindrical structure composed of the first bearing left end cover, the first sleeve and the first bearing right end cover.

[0008] The test device for realizing the bionic wall fluid resistance of multi-angle jet is characterized in that the test device includes a transmission shaft, a second bearing left end cover, a second sleeve, a sealing cylinder left end cover, a sealing end cover, a sample support frame, a sealing cylinder, a jet wall cylinder, a sealing cylinder right end cover, a magnetic fluid sealing structure, a fixing cover and a locking nut. The left end of the second sleeve is fixed to the second bearing left end cover by a screw, and the right end is fixed to the outer mounting surface of the left end cover of the sealing cylinder by a bolt. A felt ring for sealing is installed inside the left end cover of the second bearing. The sealing end cover is installed on the inner mounting surface of the left end cover of the sealing cylinder. Both ends of the sealing cylinder are fixed by screws. The bolts are respectively connected to the left end cover and the right end cover of the sealing cylinder. The sample support frame is installed in a sealed space formed by the sealing cylinder, the left end cover of the sealing cylinder and the right end cover of the sealing cylinder. The jet wall cylinder is sleeved on the outside of the sample support frame, and the jet wall cylinder is fixed on the left side by screws. The right side of the jet wall cylinder is fixed with a fixing cover by bolts. The right end cover of the sealing cylinder and the fixing cover are sealed by a magnetic fluid sealing structure. The fixing cover is provided with a plurality of through holes for water inlet. A through hole is opened at the upper end of the sealing cylinder, and a ventilation bolt is installed in the through hole. A drain outlet is opened at the lower end of the sealing cylinder, and a water inlet is opened on the right end cover of the sealing cylinder.

[0009] The test device for realizing bionic wall fluid resistance of multi-angle jet is characterized in that the angle adjustment device includes a universal joint coupling, a push rod motor connecting seat, a test device bottom plate, a push rod motor, a push rod motor support, a hinge and a base, the universal joint coupling is connected to the transmission shaft, the test device is fixed on the test device bottom plate by a large rib plate, one end of the test device bottom plate is connected to the vertical plate on one side of the base by a hinge, the push rod motor connecting seat is welded to the bottom of the other end of the test device bottom plate, one side of the base adopts an L-shaped structure, and the push rod motor support is fixed at the right angle of the L-shaped structure, the push rod motor is fixed on the push rod motor support by screws, the push rod motor is connected to the push rod motor connecting seat by a pin, and the other side of the base adopts a mouth-shaped structure for installing and fixing the water supply device.

[0010] The test device for bionic wall fluid resistance that realizes multi-angle jet is characterized in that the water supply device includes a water pump, a water tank, a pump water inlet pipe, a water inlet pipe, and a water outlet pipe. The water inlet of the water pump is connected to the pump water inlet pipe through a flange, and its water outlet is connected to the water inlet pipe through a flange. The pump water inlet pipe leads to the water tank, and the other end of the water inlet pipe is connected to the water inlet of the test device, and the water outlet pipe is connected to the water outlet of the test device, and the other end leads to the water tank to form a circulation.

[0011] The test device for realizing bionic wall fluid resistance of multi-angle jet is characterized in that the magnetic fluid sealing structure includes pole shoes, magnets, elastic retaining rings for holes, and adjustment gaskets. The magnetic fluid sealing structure is installed between the fixed cover and the right end cover of the sealing cylinder, the magnet is installed in the mounting hole of the fixed cover, the pole shoes are installed on both sides of the magnet, the adjustment gasket is installed on the inner side of the pole shoes, and the elastic retaining rings for holes are installed on the outer side of the pole shoes.

[0012] The test device for realizing bionic wall fluid resistance of multi-angle jet is characterized in that the power shaft has seven sections from left to right, the first section is connected to the second coupling through a flat key, the third section and the fifth section are each equipped with a rolling bearing, and the rolling bearing is fixed through a shaft shoulder and a left end cover of the first bearing and a right end cover of the first bearing, the seventh section is connected to the angle adjustment device through a flat key and a screw, the left end cover of the first bearing and the right end cover of the first bearing are respectively fixed to the left and right ends of the first sleeve by screws, and the first sleeve is welded and fixed to the test platform through a small rib plate.

[0013] The test device for realizing bionic wall fluid resistance of multi-angle jet is characterized in that the transmission shaft has nine sections from left to right, the first section is connected to the universal joint coupling through a flat key and a screw, the third section and the sixth section are fixedly installed with the rolling bearing, and the rolling bearing is fixed by the shaft shoulder and the left end cover of the second bearing and the left end cover of the sealing cylinder, the seventh section penetrates the sealing end cover, and the eighth section is fixedly installed with the sample support frame by the flat key and the locking nut on the ninth section.

[0014] The beneficial effects of the present invention are: small size, compact and simple structure, low cost, simple operation, strong test performance, not restricted by the surrounding test environment, and convenient loading and unloading of jet wall test samples, etc., which can meet the jet wall test samples with jet holes of different shapes; the jet angle can be adjusted through the angle adjustment device to evaluate the optimal drag reduction effect; the universal joint coupling can make the two shafts not on the same axis, and the high-speed rotation of the two connected shafts can be achieved when there is an axis angle, and torque and motion can be reliably transmitted, with a compact structure and high transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present invention;

[0016] Figure 2 This is a structural diagram of the device after angle adjustment of the present invention;

[0017] Figure 3 is a structural diagram of the test device of the present invention;

[0018] Figure 4 For the present invention Figure 1 A partial enlarged view of location Ⅰ;

[0019] Figure 5 It is a cross-sectional view of the present invention at AA;

[0020] Figure 6 It is a structural diagram of the magnetic fluid sealing structure of the present invention;

[0021] In the figure: motor 1, first coupling 2, sensor support 3, torque sensor 4, second coupling 5, power shaft 6, first bearing left end cover 7, first sleeve 8, small rib 9, first bearing right end cover 10, universal joint coupling 11, test device 12, large rib 13, water outlet pipe 14, water inlet pipe 15, pump water inlet pipe 16, water pump 17, base 18, water tank 19, push rod motor connection seat 20, test device bottom plate 21, push rod motor 22, push rod motor support 23 , hinge 24, test platform 25, transmission shaft 101, second bearing left end cover 102, second sleeve 103, sealing cylinder left end cover 104, sealing end cover 105, sample support frame 106, sealing cylinder 107, ventilation bolt 108, jet wall cylinder 109, sealing cylinder right end cover 110, magnetic fluid sealing structure 111, fixing cover 112, locking nut 113, adjusting gasket 1101, pole shoe 1102, magnet 1103, elastic retaining ring 1104 for hole. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] See attached Figure 1-6 Shown is: a testing device for bionic wall fluid resistance that realizes multi-angle jets, a power transmission device, a test device, an angle adjustment device, a water supply device and an auxiliary device, wherein one end of the power transmission device is connected to one end of the test device, the other end of the test device is connected to the water supply device, and the test device is installed on the angle adjustment device.

[0024] Combined with Figure 1 , attached Figure 2 , attached Figure 5, the power transmission device is described in detail: the motor 1 provides power for the entire device and is installed and fixed on the test platform 25. The output shaft of the motor 1 is connected to the input shaft of the torque sensor 4 through the first coupling 2. The torque sensor 4 is fixed to the sensor support 3 by bolts. The sensor support 3 is fixedly installed on the test platform 25. The output shaft of the torque sensor 4 is connected to the power shaft 6 through the second coupling 5. The power shaft 6 passes through the cylinder composed of the left end cover 7 of the first bearing, the first sleeve 8 and the right end cover 10 of the first bearing. The power shaft 6 has seven sections from left to right. The first section is connected to the second coupling through a flat key. 5. A rolling bearing is installed in each of the third section and the fifth section for fixing and positioning, and the rolling bearing is fixed through the shaft shoulder and the first bearing left end cover 7 and the first bearing right end cover 10. The seventh section is connected to the universal joint coupling 11 through a flat key and a screw. The left and right ends of the first sleeve 8 are respectively fixed to the first bearing left end cover 7 and the first bearing right end cover 10 by screws. The first sleeve 8 is welded and fixed to the test platform 25 through a small rib plate 9. The input shaft of the torque sensor 4 is acted upon by the motor 1, and the output shaft is acted upon by the test device 12. The two act together to generate a dynamic torque, so that the drag reduction rate can be obtained.

[0025] Combined with Figure 1 , attached Figure 2 , attached Figure 3 , attached Figure 5, the test device 12 is described in detail: the whole device starts from left to right, the transmission shaft 101 has nine sections from left to right, the first section is connected to the universal joint coupling 11 through a flat key and a screw, the third section and the sixth section are fixed with a rolling bearing, and the rolling bearing is fixed through a shaft shoulder and the second bearing left end cover 102 and the sealing sleeve left end cover 104, the seventh section passes through the sealing end cover 105, the eighth section is fixed with the sample support frame 106 through a flat key and the locking nut 113 on the ninth section, and the transmission shaft 101 passes through the second bearing left end cover 102, the second sleeve 103 and the sealing sleeve left end cover 104. The cylinder is composed of end covers 104, and a felt ring is installed inside the left end cover 102 of the second bearing for sealing. The left end cover 102 of the second bearing is fixed by screws on the left end mounting surface of the second sleeve 103. The second sleeve 103 is fixed to the mounting surface on the outside of the left end cover 104 of the sealing cylinder by bolts. The sealing end cover 105 is installed and fixed on the inner side of the left end cover 104 of the sealing cylinder. A felt ring is also installed inside the sealing end cover 105 to prevent the fluid from entering the second sleeve 103, thereby damaging the rolling bearing and other parts. The left end cover 104 of the sealing cylinder and the right end cover 107 of the sealing cylinder are installed on the left and right sides. 10, forming a closed space, the upper end of the sealing cylinder 110 is provided with a vent hole for exhausting excess air when water is inletted, and the vent bolt 108 is screwed on when not in use, and the lower end is provided with a water outlet, and the center of the right end cover 110 of the sealing cylinder is provided with a water inlet, the sample support frame 106 is in the shape of a barrel, and a plurality of large through holes are provided on the barrel wall to facilitate the outflow of water, the sample support frame 106 is installed concentrically with the sealing cylinder 107, and the jet wall cylinder 109 is sleeved on its outer side, and the left side is fixed by screws, and the fixing cover 112 is fixed by screws on the right side of the jet wall cylinder 109, and the fixing cover 11 2 A plurality of through holes are evenly opened around the center of the circle for water inlet. A magnetic fluid sealing structure 111 is installed between the fixed cover 112 and the right end cover 110 of the sealing cylinder. The characteristic of the magnetic fluid sealing structure 111 is that zero leakage can be achieved within a reasonable pressure difference. The structure is non-contact, so it will not affect the problem of torque accuracy reduction. When the test device 12 starts the test, water first enters from the right end cover 110 of the sealing cylinder, flows through the fixed cover 112 into the sample support frame 106, and then flows out from the jet wall cylinder 109 into the sealing cylinder 107, and finally flows out from the water outlet at the lower end of the sealing cylinder 107.

[0026] Combined with Figure 1 , attached Figure 2 , attached Figure 4, the angle adjustment device is described in detail: the universal joint coupling 11 can make the two shafts not on the same axis, and the high-speed rotation of the connected two shafts can be achieved when there is an axis angle, and the torque and motion can be reliably transmitted. It is characterized by compact structure and high transmission efficiency. The left and right ends of the universal joint coupling 11 are respectively connected to the power shaft 6 and the transmission shaft 101 by flat keys and screws. The test device 12 is fixed on the test device bottom plate 21 by a large rib 13. The lower right end of the test device bottom plate 21 is fixed to the push rod motor connecting seat 20 by welding, and the left side is connected to the base 18 by multiple hinges 24. The base 18 is divided into two parts. The left side is L-shaped, and its top is connected to the test device bottom plate 21. The push rod motor support 23 with a triangular cross-section is installed and fixed at the right angle. The bottom end of the push rod motor 22 is fixed to the push rod motor support 23 by screws, and the top is connected to the push rod motor connecting seat 20 by a pin. The right side of the base 18 is shaped like a mouth, which is used to install and fix the water pump 17.

[0027] Combination Figure 1 , Figure 2 , the water supply device is described in detail: the water pump 17 provides water flow for the entire device, and its water inlet is connected to the pump inlet pipe 16 through a flange. The pump inlet pipe 16 leads to the water tank 19. The water outlet of the water pump 17 is connected to the water inlet pipe 15 through a flange. The other end of the water inlet pipe 15 is connected to the right end cover 110 of the sealing cylinder. One end of the water outlet pipe 14 is connected to the water outlet of the sealing cylinder 107, and the other end leads to the water tank 19. The water tank 19 is placed on the base 18. The material of the water outlet pipe 14 and the water inlet pipe 15 is a polymer material such as polyurethane, which is easy to deform. Even after the angle of the test device is adjusted, it will not affect the test.

[0028] Combination Figure 1 , Figure 2 , the auxiliary device is described in detail: the motor 1, the sensor support 3, and the small rib plate 9 are fixedly installed on the test platform 25, the test device 12 is fixed on the upper end of the large rib plate 13, and the lower end is connected to the test device bottom plate 21.

[0029] Combination Figure 3 , Figure 6 , the magnetic fluid sealing device is described in detail: the magnetic fluid sealing structure 111 is installed between the fixed cover 112 and the right end cover 110 of the sealing cylinder, the magnet 1103 is installed in the mounting hole of the fixed cover 112, the pole shoes 1102 are installed on both sides of the magnet 1103, the adjusting gasket 1101 is installed on the inner side of the pole shoe 1102, and the hole elastic retaining ring 1104 is installed on the outer side of the pole shoe 1102 for fixing to prevent leakage between the pole shoe 1102 and the mounting through hole.

[0030] The working principle of the test device is as follows: at the beginning of the test, first turn on the water pump 17, unscrew the vent bolt 108, tighten the water outlet pipe 14, and water enters the test device 12 from the water tank 19. When the water overflows the vent, loosen the water outlet pipe 14, tighten the vent bolt 108, adjust the angle, turn on the shortened push rod motor 22, and adjust the angle of the entire test device 12 with the universal joint coupling 11 as the center of the circle. When it is appropriate, turn off the push rod motor 22, and then turn on the motor 1 to drive the power shaft 6 and the transmission shaft 101 to rotate. The transmission shaft 101 drives the jet wall cylinder 109 to rotate, and the water flows from the inside of the jet wall cylinder 109 to the outside to form a jet. Due to the jet action, the torque sensor 4 will receive the dynamic torque of the motor 1 and the jet, and then replace the smooth hydrofoil component to measure the dynamic torque, and compare and calculate the drag reduction rate. When the test is over, the excess water is discharged from the water outlet pipe 14 below the sealing cylinder 107 to prevent damage to the parts.

[0031] The purpose of the present invention is to evaluate the drag reduction effect of the jet wall surface, and at the same time adjust the jet angle in the device, and evaluate the drag reduction effect at different angles of the jet direction through a control test. The jet wall surface can be processed into different shapes, such as a smooth surface, a convex structure, etc. The drag reduction rate of different hydrofoil test samples in the test device is collected through a data acquisition system, and the data is compared to obtain the drag reduction effect of different surface structures, thereby studying the drag reduction characteristics of the jet surface structure.

[0032] The contents described in the embodiments of this specification are merely an enumeration of implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also includes equivalent technical means that can be thought of by those skilled in the art based on the inventive concept.

Claims

1. A test device for bionic wall fluid resistance of multi-angle jet, characterized in that: It includes a power transmission device, a test device, an angle adjustment device, a water supply device and a test platform. One end of the power transmission device is drivingly connected to one end of the test device, and the other end of the test device is connected to the water supply device. The test device is fixedly arranged on the angle adjustment device, so as to realize multi-angle adjustment of the test device. The power transmission device comprises a motor (1), a first coupling (2), a sensor support (3), a torque sensor (4), a second coupling (5), a power shaft (6), a first bearing left end cover (7), a first sleeve (8), a small rib plate (9) and a first bearing right end cover (10), wherein the motor (1), the sensor support (3) and the small rib plate (9) are respectively fixed on a test platform (25), the output shaft of the motor (1) is connected to the torque sensor (4) via the first coupling (2), the torque sensor (4) is fixedly mounted on the upper end of the sensor support (3), the other end of the torque sensor (4) is connected to the power shaft (6) via the second coupling (5), and the power shaft (6) is inserted into a cylindrical structure composed of the first bearing left end cover (7), the first sleeve (8) and the first bearing right end cover (10); The test device comprises a transmission shaft (101), a second bearing left end cover (102), a second sleeve (103), a sealing cylinder left end cover (104), a sealing end cover (105), a sample support frame (106), a sealing cylinder (107), a jet wall cylinder (109), a sealing cylinder right end cover (110), a magnetic fluid sealing structure (111), a fixing cover (112) and a locking nut (113); the left end of the second sleeve (103) is fixed to the second bearing left end cover (102) by screws, and the right end is fixed to the outer mounting surface of the sealing cylinder left end cover (104) by bolts; a felt ring for sealing is installed inside the second bearing left end cover (102); the sealing end cover (105) is installed on the inner mounting surface of the left end cover of the sealing cylinder (107); and the two ends of the sealing cylinder (107) are respectively connected to the sealing cylinder left end cover (104) by bolts. ) and a right end cover (110) of the sealing cylinder, the sample support frame (106) is installed in a sealed space formed by the sealing cylinder (107), the left end cover (104) of the sealing cylinder and the right end cover (110) of the sealing cylinder, the jet wall cylinder (109) is sleeved on the outside of the sample support frame (106), and the jet wall cylinder (109) is fixed on the left side by screws, and a fixing cover (112) is installed on the right side of the jet wall cylinder (109) by bolts, the right end cover (110) of the sealing cylinder and the fixing cover (112) are sealed by a magnetic fluid sealing structure (111), and a plurality of through holes for water inlet are provided on the fixing cover (112), a through hole is provided at the upper end of the sealing cylinder (107), a venting bolt (108) is installed in the through hole, a water outlet is provided at the lower end of the sealing cylinder (107), and a water inlet is provided on the right end cover (110) of the sealing cylinder; The angle adjustment device comprises a universal joint coupling (11), a push rod motor connection seat (20), a test device base plate (21), a push rod motor (22), a push rod motor support (23), a hinge (24) and a base (18), wherein the universal joint coupling (11) is connected to a transmission shaft (101), the test device is fixed to the test device base plate (21) via a large rib plate (13), and one end of the test device base plate (21) is connected to a vertical plate on one side of the base (18) via a hinge. (24) connection, a push rod motor connection seat (20) is welded to the bottom of the other end of the bottom plate (21) of the test device, one side of the base (18) adopts an L-shaped structure, and a push rod motor support (23) is fixed at a right angle of the L-shaped structure, the push rod motor (22) is fixed on the push rod motor support (23) by screws, and the push rod motor (22) is connected to the push rod motor connection seat (20) by a pin, and the other side of the base (18) adopts a mouth-shaped structure for installing and fixing the water supply device.

2. The device for testing the bionic wall fluid resistance of multi-angle jet according to claim 1, characterized in that: The water supply device comprises a water pump (17), a water tank (19), a pump water inlet pipe (16), a water inlet pipe (15), and a water outlet pipe (14). The water inlet of the water pump (17) is connected to the pump water inlet pipe (16) via a flange, and the water outlet is connected to the water inlet pipe (15) via a flange. The pump water inlet pipe (16) leads to the water tank (19). The other end of the water inlet pipe (15) is connected to the water inlet of the test device. The water outlet pipe (14) is connected to the water outlet of the test device, and the other end leads to the water tank (19) to form a circulation.

3. The testing device for realizing bionic wall fluid resistance of multi-angle jet according to claim 1, characterized in that: The magnetic fluid sealing structure (111) comprises a pole shoe (1102), a magnet (1103), a hole elastic retaining ring (1104), and an adjustment gasket (1101); the magnetic fluid sealing structure (111) is installed between a fixed cover (112) and a right end cover (110) of a sealing cylinder; the magnet (1103) is installed in a mounting hole of the fixed cover (112); pole shoes (1102) are installed on both sides of the magnet (1103); the adjustment gasket (1101) is installed on the inner side of the pole shoe (1102); and the hole elastic retaining ring (1104) is installed on the outer side of the pole shoe (1102).

4. The device for testing the bionic wall fluid resistance of multi-angle jet according to claim 1, characterized in that: The power shaft (6) has seven sections from left to right, the first section is connected to the second coupling (5) via a flat key, the third section and the fifth section are each equipped with a rolling bearing, and the rolling bearings are fixed via a shaft shoulder and a first bearing left end cover (7) and a first bearing right end cover (10), the seventh section is connected to the angle adjustment device via a flat key and screws, the left and right ends of the first sleeve (8) are respectively fixed to the first bearing left end cover (7) and the first bearing right end cover (10) via screws, and the first sleeve (8) is welded and fixed to the test platform (25) via a small rib plate (9).

5. The testing device for realizing bionic wall fluid resistance of multi-angle jet according to claim 1, characterized in that: The transmission shaft (101) has nine sections from left to right. The first section is connected to the universal joint coupling (11) via a flat key and a screw. The third and sixth sections are fixedly mounted with rolling bearings, and the rolling bearings are fixed via a shaft shoulder and a second bearing left end cover (102) and a sealing cylinder left end cover (104). The seventh section passes through the sealing end cover (105). The eighth section is fixedly mounted on the sample support frame (106) via a flat key and a locking nut (113) on the ninth section.

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