Variable-amplitude high-frequency gust generator

Abstract

The invention discloses a variable-amplitude high-frequency gust generator in the technical field of wind tunnel test equipment, and the generator comprises a supporting frame, an amplitude driving device, an amplitude adjusting device, an amplitude biasing device and an amplitude conversion device, adjusts the amplitude through a worm transmission device, and achieves the amplitude driving through a planet wheel, a gear ring, an inner swing arm and an outer swing arm. The problem that in an existing wind tunnel test, a gust generator cannot achieve high-frequency and variable-amplitude motion is solved, the selection range of gust in the wind tunnel test is expanded, and the gust generator is compact in structure and easy and convenient to operate.

Description

Technical Field

[0001] The invention relates to a variable amplitude high frequency gust generator, belonging to the technical field of wind tunnel test equipment. Background Art

[0002] It is almost inevitable that an aircraft will encounter gusts of different wind speeds and directions during flight, which will bring additional structural dynamic loads and wing elastic modal vibrations, making it difficult for pilots to control, reducing passenger comfort, and even causing aircraft turbulence, ultimately causing fatigue damage or damage. For bombers performing missions at low altitudes, it may also seriously affect weapon delivery and flight safety. If a missile flying in the air encounters gusts, it will cause rigid body motion and elastic vibration of the missile, which may affect the missile's structural safety, the reliability of electrical equipment, and the accuracy of its hits. Therefore, gust load prediction research must be carried out during the aircraft design phase.

[0003] At present, wind tunnel tests are usually used to predict the impact of gusts on aircraft. Gust-related wind tunnel tests can not only simulate the gust characteristics of aircraft more accurately, but also verify the accuracy and reliability of numerical simulation results, and thus have attracted more extensive attention. In order to carry out gust load mitigation wind tunnel test research, it is necessary to develop a gust generator device.

[0004] The existing gust generator device has a complex structure and is difficult to handle high-frequency gust problems. In addition, it is difficult to adjust the amplitude of the existing gust generator, which limits the role of the gust test. Summary of the invention

[0005] The object of the present invention is to provide a variable amplitude high frequency gust generator, which is arranged in a wind tunnel to generate variable amplitude high frequency gusts for carrying out gust load wind tunnel tests.

[0006] In order to solve the above-mentioned technical problems, the technical solutions adopted by the present invention are as follows: A variable amplitude high frequency gust generator, comprising a supporting frame, an amplitude driving device, an amplitude adjusting device, an amplitude biasing device and a gust generating device, wherein the amplitude driving device, the amplitude adjusting device and the amplitude biasing device are mounted on the supporting frame, and the gust generating device is mounted on the amplitude driving device via a connecting frame and is located on the top of the supporting frame; The amplitude adjustment device includes a second motor, a second reducer, a second motor connecting plate, a worm gear transmission device and a gear ring fixing ring. The second motor is connected to the worm gear transmission device via the second reducer, and the worm gear transmission device is connected to the gear ring fixing ring. A gear ring is fixed inside the gear ring fixing ring. The worm gear transmission device is integrally mounted on the front side of the mounting plate. The main body of the amplitude adjustment device is formed. The worm gear is driven to rotate by the second motor, and finally the gear ring is driven to rotate by the gear ring fixing ring to adjust the angle between the inner and outer swing arms, thereby completing the amplitude adjustment.

[0007] Amplitude driving device: includes a first motor, a first reducer, a generator base, a gear ring, an inner swing arm, a planetary gear, an outer swing arm, a first slider, a first guide rail, a first guide rail mounting frame, a second slider, a second guide rail, a second guide rail mounting frame and a second slider fixing plate. The first motor is installed in cooperation with the first reducer and fixedly installed on the mounting plate; one side of the planetary gear is connected to one end of the inner swing arm, and the other side of the planetary gear is connected to one end of the outer swing arm. The output end of the first reducer is connected to the other end of the inner swing arm, and the gear ring is meshed with the planetary gear; the first guide rail is horizontally installed on the first guide rail mounting frame, and the first slider installed in the first guide rail is connected to the The other end of the outer swing arm is connected; the first guide rail mounting frame is fixed to the second guide rail arranged longitudinally, and the second slider arranged in conjunction with the second guide rail is fixed to the second guide rail mounting frame, and the second guide rail mounting frame is fixed to the mounting plate; the ring gear, the inner swing arm, the planetary gear and the outer swing arm constitute the main body of the amplitude generator, and the first motor drives the rotation of the inner swing arm to realize the meshing of the planetary gear and the ring gear, and drives the outer swing arm to move; the first slider, the first guide rail and the first guide rail mounting frame filter the lateral movement of the outer swing arm, and the second slider, the second guide rail, the second guide rail mounting frame and the second slider fixing plate output the longitudinal movement of the outer swing arm to complete the generation of amplitude.

[0008] Furthermore, the amplitude biasing device includes a third motor, a third motor connecting plate, a synchronous pulley, a ball screw, a third slider, and a third guide rail. The third motor is connected to the support frame through the third motor connecting plate. The output shaft end of the third motor is connected to the ball screw through a synchronous pulley. The ball nut of the ball screw is fixed on the back of the mounting plate. The axis of the third guide rail is parallel to the axis of the screw, and the third guide rail is longitudinally arranged. The third guide rail, the third slider, and the mounting plate constitute the main body of the amplitude biasing device. The ball screw is driven to move by the third motor, and the mounting plate is driven to move with the support of the third slider and the third guide rail, thereby changing the initial angle of the blade and completing the amplitude biasing.

[0009] Furthermore, the gust generating device includes blades, an external frame, a frame connecting block, a fourth slider, a fourth guide rail, a fourth slider fixing plate, a fourth guide rail fixing block, a fifth guide rail, a fifth slider, a fifth slider connecting block, a blade limit block and a bearing seat; the rear parts of both sides of the blades are rotatably mounted on the external frame via bearings and bearing seats; blade limit blocks are respectively provided at the front parts of both sides of the blades, the fifth guide rail is fixed to the blade limit block, the fifth guide rail is matched with the fifth slider, the fifth slider is mounted on the fifth slider connecting block, the fifth slider connecting block is rotatably connected to the fourth guide rail fixing block, the fourth guide rail is mounted on the fourth guide rail fixing block, the fourth guide rail is longitudinally arranged, the fourth slider matching the fourth guide rail is connected to the external frame via the fourth slider fixing plate, and the lower part of the fourth guide rail is connected to the top of the connecting frame via the frame connecting block. The fourth slider, the fourth guide rail and the fourth slider fixing plate are used to receive the longitudinal movement transmitted by the amplitude generating device, and are converted into swing by the fifth slider, the fifth guide rail, the fifth guide rail fixing block and the bearing seat, forming a connecting rod slider mechanism as a whole. The blade limit block drives the blade to swing back and forth to complete the generation of gusts.

[0010] Furthermore, the first slider and the first guide rail, the second slider and the second guide rail, the third slider and the third guide rail, the fourth slider and the fourth guide rail, and the fifth slider and the fifth guide rail are all symmetrically arranged in two groups.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The gust generator of the present invention is simple, compact, easy to carry and transport, and can be applied to gust generators of various wind tunnels. The structure is simple, quick, and low-cost to install.

[0012] 2. The gust generator of the present invention realizes the reciprocating high-frequency motion of gusts through planetary gears. When the rotation speed of the first motor is changed, the meshing speed of the planetary gear and the ring gear can be changed. The faster the speed, the higher the gust frequency.

[0013] 3. The gust generator of the present invention realizes the change of gust amplitude by adjusting the blade swing amplitude. When the angle value between the ring gear and the inner and outer swing arms is adjusted, the blade swing amplitude changes accordingly. The larger the angle value, the larger the blade swing amplitude.

[0014] 4. The gust generator of the present invention adjusts the initial pitch angle of the blades through a ball screw to achieve an initial offset of the blade swing angle.

[0015] 5. The gust generator of the present invention realizes synchronous driving of the blades through a connecting rod slider mechanism. The blades are connected to the slider. When the driving mechanism drives the guide rail to move, the connecting rod slider mechanism converts the reciprocating motion of the guide rail into the rotation of two groups of blades. Its synchronous rotation method is a parallelogram mechanism. This arrangement can effectively avoid the internal stress of the blade assembly caused by gravity factors and installation errors, and solve the problem of poor gust generation effect and affecting the accuracy of wind tunnel test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an isometric view of the overall structure of a variable amplitude high frequency gust generator.

[0017] Figure 2 An isometric view of a drive device for a variable amplitude high frequency gust generator.

[0018] Figure 3 The isometric diagram is an amplitude driving device and an amplitude regulating device of a variable-amplitude high-frequency gust generator.

[0019] Figure 4 The present invention is a diagram of key parts of an amplitude driving device and an amplitude regulating device of a variable-amplitude high-frequency gust generator.

[0020] Figure 5 An isometric view of an amplitude bias device for a variable amplitude high frequency gust generator.

[0021] Figure 6 An isometric view of a gust generating device of a variable amplitude high frequency gust generator.

[0022] Figure 7 This is a diagram of the key parts of a gust generating device of a variable amplitude high frequency gust generator.

[0023] Figure 8 It is a partial structural schematic diagram of a variable-amplitude high-frequency gust generator, in which the first guide rail mounting frame is removed to show the first guide rail.

[0024] In the figure, 1 is a supporting base, 2 is a supporting frame, 3 is an amplitude adjusting device, 3-1 is a second motor, 3-2 is a second reducer, 3-3 is a second motor connecting plate, 3-4 is a worm gear transmission device, 3-5 is a gear ring fixing ring, 4 is an amplitude driving device, 4-1 is a first motor, 4-2 is a first reducer, 4-3 is a fixed base, 4-4 is a gear ring, 4-5 is an inner swing arm, and 4-6 is a planetary gear. 4-7 outer swing arm, 4-8 first slider, 4-9 first guide rail mounting frame, 4-10 second guide rail mounting frame, 4-11 second guide rail, 4-12 second slider, 4-13 second slider fixing plate, 4-14 first motor connecting plate, 4-15 first guide rail, 4-16 connecting shaft, 5 amplitude biasing device, 5-1 third motor, 5-2 synchronous pulley, 5-3 synchronous belt, 5-4 ball screw, 5-5 ball nut, 5-6 third guide rail, 5-7 third slider, 6 connecting frame, 7 blades, 8 gust generating device, 8-1 frame connecting block, 8-2 fourth slider, 8-3 fourth guide rail, 8-4 fourth slider fixing plate, 8-5 external frame, 8-6 fifth guide rail fixing block, 8-7 fifth guide rail, 8-8 fifth slider, 8-9 bearing seat, 8-10 fifth slider connecting block, 8-11 blade limit block, 8-12 fourth guide rail fixing block. DETAILED DESCRIPTION

[0025] like Figure 1-7 The variable amplitude high frequency gust generator shown comprises five parts: a support frame 2, an amplitude driving device 4, an amplitude adjusting device 3, an amplitude biasing device 5 and a gust generating device 8.

[0026] Specifically, the support frame 2 is connected to the support base 1 by bolt connection, and positioning holes are opened on the support frame 2 to facilitate the installation and positioning of subsequent parts; the amplitude driving device 4, the amplitude adjusting device 3, and the amplitude biasing device 5 are installed on the support frame 2, and the gust generating device 8 is installed on the amplitude driving device 4 via the connecting frame 6 and is located on the top of the support frame 2.

[0027] Among them, the amplitude adjustment device 3 includes a second motor 3-1, a second reducer 3-2, a second motor connecting plate 3-3, a worm gear transmission device 3-4 and a ring gear fixing ring 3-5. The second motor 3-1 is connected to the worm gear transmission device 3-4 through the second reducer 3-2, and the worm gear transmission device 3-4 is connected to the ring gear fixing ring 3-5. A ring gear 4-4 is fixed in the ring gear fixing ring 3-5. The worm gear transmission device 3-4 is integrally installed on the front side of the mounting plate through a fixed base 4-3. The main body of the amplitude adjustment device 3 is formed. The worm gear is driven to rotate by the second motor 3-1, and finally the ring gear 4-4 is driven to rotate by the ring gear fixing ring 3-5 to adjust the angle between the inner and outer swing arms 4-7 to complete the amplitude adjustment.

[0028] The amplitude driving device 4 includes a first motor 4-1, a first reducer 4-2, a generator base, a ring gear 4-4, an inner swing arm 4-5, a planetary gear 4-6, an outer swing arm 4-7, a first slider 4-8, a first guide rail 4-15, a first guide rail mounting frame 4-9, a second slider 4-12, a second guide rail 4-11, a second guide rail mounting frame 4-10 and a second slider fixing plate 4-13. The first motor 4-1 is installed in cooperation with the first reducer 4-2 and fixedly installed on the mounting plate; one side of the planetary gear 4-6 is connected to one end of the inner swing arm 4-5, and the other side of the planetary gear 4-6 is connected to one end of the outer swing arm 4-7. The output end of the first reducer 4-2 is connected to the other end of the inner swing arm 4-5, and the ring gear 4-4 is meshed and installed with the planetary gear 4-6, and the planetary gear 4-6 can rotate around its connecting shaft 4-16; the first guide rail 4-15 is horizontally installed on the first guide rail mounting frame 4-9, and is installed in cooperation with the first guide rail 4-15 The first slider 4-8 is connected to the other end of the outer swing arm 4-7; the first guide rail mounting frame 4-9 is fixed to the second guide rail 4-11 arranged longitudinally, and the second slider 4-12 arranged in conjunction with the second guide rail 4-11 is fixed to the second guide rail mounting frame 4-10, and the second guide rail mounting frame 4-10 is fixed to the mounting plate; the ring gear 4-4, the inner swing arm 4-5, the planetary gear 4-6 and the outer swing arm 4-7 constitute the main body of the amplitude generator, and the first motor 4-1 drives the rotation of the inner swing arm 4-5 to realize the engagement of the planetary gear 4-6 with the ring gear 4-4, and drives the outer swing arm 4-7 to generate movement; the first slider 4-8, the first guide rail 4-15 and the first guide rail mounting frame 4-9 filter the lateral movement of the outer swing arm 4-7, and the second slider 4-12, the second guide rail 4-11, the second guide rail mounting frame 4-10 and the second slider fixing plate 4-13 output the longitudinal movement of the outer swing arm 4-7 to complete the generation of amplitude.

[0029] The amplitude biasing device 5 includes a third motor 5-1, a third motor 5-1 connecting plate, a synchronous pulley 5-2, a ball screw 5-4, a third slider 5-7, and a third guide rail 5-6. The third motor 5-1 is connected to the support frame 2 through the third motor 5-1 connecting plate. The output shaft end of the third motor 5-1 is connected to the ball screw 5-4 through the synchronous pulley 5-2 and the synchronous belt 5-3. The ball nut 5-5 of the ball screw 5-4 is fixed on the back of the mounting plate. The axis of the third guide rail 5-6 is parallel to the axis of the screw, and the third guide rail 5-6 is longitudinally arranged; the third guide rail 5-6, the third slider 5-7 and the mounting plate constitute the main body of the amplitude biasing device 5. The ball screw is driven to move by the third motor 5-1, and the mounting plate is driven to move with the support of the third slider 5-7 and the third guide rail 5-6, so as to change the initial angle of the blade 7 and complete the amplitude biasing.

[0030] The gust generating device 8 includes a blade 7, an external frame 8-5, a frame connecting block 8-1, a fourth slider 8-2, a fourth guide rail 8-3, a fourth slider fixing plate 8-4, a fourth guide rail fixing block 8-12, a fifth guide rail 8-7, a fifth slider 8-8, a fifth slider connecting block 8-10, a blade limit block 8-11 and a bearing seat 8-9; the rear parts of both sides of the blade 7 are rotatably mounted on the external frame 8-5 via bearings and bearing seats 8-9; the front parts of both sides of the blade 7 are respectively provided with blade limit blocks 8-11, and the fifth guide rail 8-7 is fixed to the blade limit blocks 8-11 The fifth guide rail 8-7 is arranged in cooperation with the fifth slider 8-8, and the fifth slider 8-8 is installed on the fifth slider connection block 8-10, and the fifth slider connection block 8-10 is rotatably connected with the fourth guide rail fixing block 8-12. The fourth guide rail 8-3 is installed on the fourth guide rail fixing block 8-12, and the fourth guide rail 8-3 is arranged longitudinally. The fourth slider 8-2 matched with the fourth guide rail 8-3 is connected to the external frame 8-5 through the fourth slider fixing plate 8-4, and the lower part of the fourth guide rail 8-3 is connected to the top of the connecting frame 6 through the frame connection block 8-1. The fourth slider 8-2, the fourth guide rail 8-3 and the fourth slider fixing plate 8-4 are used to receive the longitudinal motion transmitted by the amplitude generating device, and are converted into swing by the fifth slider 8-8, the fifth guide rail 8-7, the fifth guide rail fixing block 8-6 and the bearing seat 8-9, forming a connecting rod slider mechanism as a whole, and the blade limit block 8-11 drives the blade 7 to swing, so as to complete the generation of gusts.

[0031] Further, the first slider 4-8 and the first guide rail 4-15, the second slider 4-12 and the second guide rail 4-11, the third slider 5-7 and the third guide rail 5-6, the fourth slider 8-2 and the fourth guide rail 8-3, and the fifth slider 8-8 and the fifth guide rail 8-7 are symmetrically arranged in two groups.

[0032] When the device is in use, the outer swing arm 4-7 decomposes the circular motion of the planetary gear 4-6 into reciprocating motion in the X-axis and Y-axis directions through the first guide rail 4-15, the first slider 4-8, the second guide rail 4-11 and the second slider 4-12, and filters the motion in the X-axis direction through the first slider 4-8 and the first guide rail 4-15, and finally completes the output of the motion in the Y-axis direction.

[0033] The worm gear 3-4, the ring gear fixing ring 3-5 and the ring gear 4-4 form the main body of the amplitude adjustment device 3. When the first motor 4-1 is not working, the position of the inner swing arm 4-5 remains fixed. When the ring gear 4-4 is driven by the second motor 3-1 to rotate, due to the meshing action between the ring gear 4-4 and the planetary gear 4-6, the planetary gear 4-6 will rotate, and the outer swing arm 4-7 will rotate with the planetary gear 4-6, and the angle between the inner and outer swing arms 4-7 will change, which will eventually cause the radius of the trajectory circle of the outer swing arm 4-7 to change, and the amplitude adjustment is completed.

[0034] The ball screw 5-4 is fixed through the positioning hole opened on the support frame 2, and is connected to the first motor connecting plate 4-14 through the connecting plate positioning block, and the first connecting plate is fixed and moved up and down through the third slider 5-7 and the third guide rail 5-6. The rotation of the third motor 5-1 drives the overall movement of the amplitude driving device 4 and the amplitude adjusting device 3, and the initial elevation angle of the blade 7 is adjusted under the action of the gust generating device 8 to achieve the amplitude bias.

[0035] The fifth guide rail 8-7 fixing block and the bearing seat are assembled into a parallel slider mechanism, and under the restriction of the bearing seat, the movement in the Y-axis direction is converted into the swing of the fifth guide rail fixing block 8-6, and under the action of the blade limit block 8-11, the blade 7 is driven to swing to complete the generation of gusts.

[0036] The gust generator of the present invention is simple, small in size, easy to carry and transport, can be applied to gust generators of various wind tunnels, and has a simple and fast structure and low cost.

[0037] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present invention, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A variable amplitude high frequency gust generator, characterized in that: It includes a supporting frame, an amplitude driving device, an amplitude adjusting device, an amplitude biasing device and a gust generating device, wherein the amplitude driving device, the amplitude adjusting device and the amplitude biasing device are mounted on the supporting frame, and the gust generating device is mounted on the amplitude driving device via a connecting frame and is located on the top of the supporting frame; Amplitude adjustment device: comprising a second motor, a second reducer, a second motor connecting plate, a worm gear transmission device and a gear ring fixing ring, wherein the second motor is connected to the worm gear transmission device via the second reducer, the worm gear transmission device is connected to the gear ring fixing ring, and a gear ring is fixed inside the gear ring fixing ring; the worm gear transmission device is integrally mounted on the front of the mounting plate; Amplitude driving device: includes a first motor, a first reducer, a generator base, a ring gear, an inner swing arm, a planetary gear, an outer swing arm, a first slider, a first guide rail, a first guide rail mounting frame, a second slider, a second guide rail, a second guide rail mounting frame and a second slider fixing plate. The first motor is installed in cooperation with the first reducer and fixedly installed on the mounting plate; one side of the planetary gear is connected to one end of the inner swing arm, and the other side of the planetary gear is connected to one end of the outer swing arm. The output end of the first reducer is connected to the other end of the inner swing arm, and the ring gear is meshed and installed with the planetary gear; the first guide rail is horizontally installed on the first guide rail mounting frame, and the first slider installed in the first guide rail is connected to the other end of the outer swing arm; the first guide rail mounting frame is fixed to the second guide rail arranged longitudinally, and the second slider arranged in cooperation with the second guide rail is fixed to the second guide rail mounting frame, and the second guide rail mounting frame is fixed to the mounting plate.

2. A variable amplitude high frequency gust generator according to claim 1, characterized in that: The amplitude biasing device includes a third motor, a third motor connecting plate, a synchronous pulley, a ball screw, a third slider, and a third guide rail. The third motor is connected to the support frame through the third motor connecting plate. The output shaft end of the third motor is connected to the ball screw through a synchronous pulley. The ball nut of the ball screw is fixed on the back of the mounting plate. The axis of the third guide rail is parallel to the axis of the screw. The third guide rail is longitudinally arranged; the third guide rail.

3. The variable amplitude high frequency gust generator according to claim 1, characterized in that: The gust generating device comprises blades, an external frame, a frame connecting block, a fourth slider, a fourth guide rail, a fourth slider fixing plate, a fourth guide rail fixing block, a fifth guide rail, a fifth slider, a fifth slider connecting block, a blade limiting block and a bearing seat; the rear parts of both sides of the blades are rotatably mounted on the external frame via bearings and bearing seats; blade limiting blocks are respectively arranged at the front parts of both sides of the blades, the fifth guide rail is fixed to the blade limiting block, the fifth guide rail is matched with the fifth slider, the fifth slider is mounted on the fifth slider connecting block, the fifth slider connecting block is rotatably connected to the fourth guide rail fixing block, the fourth guide rail is mounted on the fourth guide rail fixing block, the fourth guide rail is longitudinally arranged, the fourth slider matched with the fourth guide rail is connected to the external frame via the fourth slider fixing plate, and the lower part of the fourth guide rail is connected to the top of the connecting frame via the frame connecting block.

4. A variable amplitude high frequency gust generator according to any one of claims 1 to 3, characterized in that: The first slider and the first guide rail, the second slider and the second guide rail, the third slider and the third guide rail, the fourth slider and the fourth guide rail, and the fifth slider and the fifth guide rail are all symmetrically arranged in two groups.

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