CN111175015B - A device for simulating nonlinear wind speed detection of wing lift - Google Patents
A device for simulating nonlinear wind speed detection of wing lift Download PDFInfo
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- CN111175015B CN111175015B CN202010132568.4A CN202010132568A CN111175015B CN 111175015 B CN111175015 B CN 111175015B CN 202010132568 A CN202010132568 A CN 202010132568A CN 111175015 B CN111175015 B CN 111175015B
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Abstract
本发明涉及一种模拟非线性风速检测机翼升力装置，利用调节装置进行非线性风速进行随机设置，利用驱动手柄调节不同风速，然后通过与之连接的U形壳体进行不同风速进行调节，基于风量一定的情况下，风速与通风通道大小成反比的原理，在非线性风速的条件下，模拟机翼进行上升，机翼上升的过程通过竖向位移记录装置进行记录，通过利用模拟板进行升力阻力的模拟，通过横向位移记录装置进行记录，最后通过牛顿第二定量进行升力的计算和研究，本发明通过在实验室的条件下进行非线性风速的模拟实验，从而得到升力的方式，构思巧妙，操作简易，可以进行不同非线性风速进行设定，对实际生活的升力的研究有着很强的指导及研究意义，实用性强，适合推广。
The invention relates to a device for simulating nonlinear wind speed detection of wing lift. An adjusting device is used to perform random setting of nonlinear wind speed, a driving handle is used to adjust different wind speeds, and then different wind speeds are adjusted through a U-shaped shell connected with it. Under the condition of a certain air volume, the wind speed is inversely proportional to the size of the ventilation channel. Under the condition of non-linear wind speed, the simulated wing will rise. The simulation of the resistance is recorded by the lateral displacement recording device, and finally the calculation and research of the lift force is carried out by the second quantification of Newton. It is easy to operate, and can be set for different nonlinear wind speeds. It has strong guidance and research significance for the study of lift in real life. It is practical and suitable for promotion.
Description
Technical Field
The invention belongs to the technical field of test devices, and particularly relates to a device for detecting wing lift force by simulating nonlinear wind speed.
Background
The aircraft is one of the most great inventions in the last century, and is more and more commonly used in modern life, wherein the power of the aircraft mainly comes from the lifting force of wings, and the lifting force is caused by the air pressure difference caused by the speed difference of airflow on the upper surface and the lower surface of the wings. However, the cause of the speed difference between the upper surface and the lower surface of the wing is complicated to explain, and the common equal time theory and the fluid continuity theory cannot completely explain the cause of the speed difference. The aviation industry commonly uses two-dimensional wing theory, which is mainly explained by the Kuta condition, the amount of the surrounding wing ring, the Kuta-Rugowski theorem and the Bernoulli principle. In a real, lift-producing wing, the airflow always meets at the trailing edge, otherwise a point of high airflow velocity will be created at the wing trailing edge. This condition is called the pylon condition and only if this condition is met is the wing likely to generate lift. This condition is not satisfied in the ideal gas or at the very beginning of the wing movement, and a viscous boundary layer is not formed. The airfoil (wing cross section) is usually longer above than below, and the upper and lower surface airflow velocity is the same initially without circulation, so that the upper airflow does not reach the trailing edge when the lower airflow reaches the trailing edge point, the rear stagnation point is located at a certain point above the airfoil, and the lower airflow must bypass the sharp trailing edge to be merged with the upper airflow. Due to the fluid viscosity (i.e., coanda effect), a low pressure vortex is formed when the lower stream passes around the trailing edge, resulting in a large adverse pressure gradient at the trailing edge. Then, the vortex is flushed away by the incoming flow, and the vortex is called a starting vortex. The wake vortex observed in the practical model is based on the law of conservation of Helmholtz vortex (Kelvin law), and a vortex which is equal to and opposite to the starting vortex strength exists around the airfoil under the action of the potential force of the ideal incompressible fluid (potential flow), namely, the circulation flow or the quantity around the airfoil. The circulation flows from the front edge of the upper surface of the airfoil to the front edge of the lower surface, so that the circulation plus the incoming flow causes the rear stagnation point to finally move backwards to the rear edge of the airfoil, thereby meeting the pylon condition. The majority of the lift of an aircraft is generated by wings, the empennage generally generates negative lift, and the lift generated by other parts of the aircraft is small and generally not considered. The principle of the lift force is that the flow velocity of the upper surface and the lower surface of the wing is different and the pressure is different due to the existence of the surrounding volume (attached vortex) of the wing, the direction is vertical to the relative airflow, the lift force of the wing is generated mainly by the action of the suction force of the upper surface rather than the action of the positive pressure force of the lower surface, the suction force formed by the upper surface of the wing generally accounts for about 60-80% of the total lift force, and the lift force formed by the positive pressure force of the lower surface only accounts for about 20-40% of. So it cannot be considered that: the aircraft is supported in the air, primarily as a result of the air impinging on the wing from below the wing. The aircraft flies in the air with various resistances, which are aerodynamic forces in the opposite direction to the direction of movement of the aircraft, which hinder the progress of the aircraft, and which we need to understand. The reasons for the generation of the pressing resistance can be classified into frictional resistance, pressure difference resistance, induced resistance, and interference resistance. Four types of drag are generated for low speed aircraft, and as for high speed aircraft, in addition to these drag, other drag such as wave drag may be generated.
The lifting force direction is strictly vertical upward, the factors influencing the lifting force can be roughly divided into two main categories of flight speed and air density, wherein the air density is that the lifting force resistance is increased to weaken the lifting force, under the regulation of a laboratory, the influence of the air density is not considered in the lifting force research of the wing, but the resistance effect of the lifting force can be equivalently replaced by the regulation of other resistance, in the prior art, when the lifting force of the wing is researched under the laboratory condition, a certain wind speed is usually applied to the wing so as to simply test and research the lifting force, the aim is mainly to research the principle of airplane lifting, however, when the research is carried out, the applied wind speed is usually linearly changed, at the moment, the lifting force of the wing under the condition of nonlinear wind speed needs to be researched, as for the nonlinear wind speed, in the practical field, the change of the wind speed is not linear change, and the change of the wind speed is abrupt, so that the wing lift is required to be researched under the condition of nonlinear wind speed when the wing lift is researched, and the invention aims to research the wing lift under the condition of nonlinear wind speed under the laboratory condition so as to guide and research the actual life.
Disclosure of Invention
Aiming at the problems, the invention provides a device for simulating the nonlinear wind speed to detect the wing lift force, which solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme that the device for detecting the wing lift force by simulating the nonlinear wind speed comprises a measuring support, and is characterized in that the upper end of the measuring support is connected with a transparent simulation cavity, a slide rail is vertically connected in the simulation cavity, a slide block is vertically and slidably connected in the slide rail, the front end and the rear end of the slide block are respectively connected with a simulation wing, a first spring arranged in a slide way is connected between the upper end of the slide block and the simulation cavity, the upper end of the slide block is connected with an L-shaped rod which is in sliding fit with the upper end of the simulation cavity and penetrates upwards, the L-shaped rod is connected with a vertical displacement recording device arranged at the upper end of the simulation cavity to record the position movement of the wing in the vertical direction, the lower end of the slide rail is connected with a transverse slide rail, a simulation plate matched with the wind receiving surface of the wing is transversely and slidably, the left end of the simulation board is connected with a second spring arranged in a transverse sliding rail, one end of the simulation board is connected with a round rod which is in transverse sliding fit with one side wall of a simulation cavity and penetrates out of the side wall, the round rod is connected with a transverse displacement recording device arranged on the side wall of the simulation cavity to record the position movement of the simulation board in the transverse direction, the right end of the simulation cavity is communicated with a transparent circular air channel arranged on a measuring bracket, a fan is rotationally connected in the circular air channel, a rotating shaft of the fan is in driving connection with an output shaft of a first motor arranged on the circular air channel through a belt, the lower end of the simulation cavity is in vertical sliding fit with an inverted U-shaped shell, an elastic rubber sleeve is connected between the upper end of the U-shaped shell and the air channel, and an adjusting device arranged on the simulation cavity is connected in the U-shaped shell, the vertical position of the U-shaped shell relative to the simulation cavity can be sequentially changed by a user through the adjusting device according to the adjustment of a tester, so that the inclination angle of the elastic rubber sleeve is changed, and the wind speed entering the simulation cavity is further changed;
the first motor, the vertical displacement recording device, the transverse displacement recording device and the adjusting device are respectively connected with the controller, and the requirement that the measurement work of the wing lifting force under the nonlinear wind speed is completed by the cooperation of the controller driving parts is met.
Preferably, the upper end of the simulation cavity is connected with a wind speed monitoring device, the wind speed monitoring device comprises an extension cavity communicated with the upper end of the simulation cavity, the extension cavity is rotatably connected with a transmission shaft of the extension simulation cavity, the transmission shaft is connected with a plurality of groups of rotating fan blades arranged in the extension cavity, the transmission shaft is coaxially provided with a fixed ring, the transmission shaft is coaxially and slidably connected with a shaft sleeve arranged at the upper end of the fixed ring, the fixing ring is uniformly hinged with three groups of connecting rods along the radial direction of the transmission shaft, the shaft sleeve is uniformly hinged with three groups of transition rods along the radial direction of the transmission shaft, the connecting rods are hinged with the end parts of the corresponding transition rods, and a centrifugal sphere is hinged at the hinged position, a third spring sleeved outside the transmission shaft is connected between the shaft sleeve and the upper end of the transmission shaft, and the transmission shaft is provided with scales for indicating the moving position of the shaft sleeve.
Preferably, the vertical displacement recording device comprises a regular hexagon frame structure which is rotatably connected to the upper end of the simulation cavity, the upper end of the frame structure is coaxially connected with an inner gear ring, the upper end of the simulation cavity is connected with a second motor, an output shaft of the second motor is connected with a first gear, a second gear which is rotatably connected to the upper end of the simulation cavity is meshed between the first gear and the inner gear ring, a first magnetic writing board is vertically matched with each group of side surfaces of the frame structure in a sliding manner, a limiting pin which is matched with the frame structure through threads is arranged between two adjacent groups of first magnetic writing boards to limit displacement in the vertical direction, and the lower end of the limiting pin is connected with a plurality of groups of anti-skid rubber particles which are matched with the upper ends of the first magnetic writing boards;
the magnetic pen is matched with the L-shaped rod in a sliding mode, so that the magnetic pen is not separated from the L-shaped rod, a fourth spring is connected between the first magnetic pen and the L-shaped rod, the first magnetic pen and the first magnetic writing board are matched for recording, and latticed scale marks are arranged on the first magnetic writing board;
the second motor is connected with the controller, and the controller is satisfied to control the second motor to work.
Preferably, the transverse displacement recording device comprises a second magnetic writing board which is vertically matched with the rear side wall of the simulation cavity in a sliding manner, an electric telescopic rod which is arranged at the upper end of the second magnetic writing board is arranged on the side wall of the simulation cavity, the lower end of the electric telescopic rod is connected with the upper end of the second magnetic writing board through a movable screwing pin, the end part of the round rod is matched with a second magnetic writing pen in a sliding manner and is not separated from the round rod, a fifth spring is connected between the second magnetic writing pen and the round rod, the second magnetic writing pen and the second magnetic writing board matching board are used for writing, and one side, facing the simulation cavity, of the second magnetic writing board is provided with grid-type scale marks;
the electric telescopic rod is connected with the controller, and the controller is satisfied to control the electric telescopic rod to work.
Preferably, the adjusting device comprises a supporting plate which is longitudinally connected in the simulation cavity and is arranged in the U-shaped shell, six groups of first rectangular hydraulic cylinders which are vertically and slidably matched on the supporting plate are uniformly distributed on the supporting plate at intervals along the longitudinal direction, a limiting frame used for limiting the rectangular hydraulic cylinders to be separated downwards from the supporting plate is arranged on the first rectangular hydraulic cylinders, a plurality of groups of reset springs are connected between the U-shaped shell and the inner side wall of the simulation cavity, the lower ends of the first rectangular hydraulic cylinders are connected with a first rectangular hydraulic rod through a piston in a matched manner, hydraulic push rods matched with the six groups of first rectangular hydraulic rods are longitudinally and uniformly distributed on the measuring support at intervals, the six groups of hydraulic push rods are communicated with a main hydraulic cylinder, the main hydraulic cylinder is connected with a controller, and the controller sequentially pushes the hydraulic push rods to a designated position from front to back through the hydraulic cylinders, and only one group of hydraulic push rods is driven and pushed each time;
the simulation chamber lateral wall on have connected gradually six groups of second rectangle pneumatic cylinders from the left hand right side, second rectangle pneumatic cylinder upper end connect a second rectangle hydraulic stem through the piston cooperation, six groups of second rectangle pneumatic cylinders from the left hand right side carry out a one-to-one intercommunication with six groups of first rectangle pneumatic cylinders from preceding respectively through the pipeline with the first rectangle pneumatic cylinder of six groups forward, and be provided with the solenoid valve on the pipeline, solenoid valve connection director, satisfy the on-off state of controller control solenoid valve, and the upper end of first rectangle pneumatic cylinder is linked together with the upper end of corresponding second rectangle pneumatic cylinder, the simulation cabin lateral wall on connect an L shaped plate, the upper end of second rectangle hydraulic stem connect a drive handle, six groups drive handle sliding fit on the L shaped plate, the drive handle is last to be provided with anti-skidding rubber sleeve, the front end of L shaped plate be provided with the scale mark.
The invention has the beneficial effects that: the invention utilizes the adjusting device to randomly set the nonlinear wind speed for users, utilizes the driving handle to preset different wind speeds, then utilizes the U-shaped shell connected with the adjusting device to adjust the different wind speeds, simulates wings to ascend under the condition of the nonlinear wind speed based on the principle that the wind speed is in inverse proportion to the size of a ventilation channel under the condition of certain wind quantity, records the ascending process of the wings through the vertical displacement recording device, simulates the lift resistance through the simulation plate, records through the transverse displacement recording device, and finally calculates and researches the lift force through Newton second quantification, and the invention carries out the simulation experiment of the nonlinear wind speed under the condition of a laboratory so as to obtain the lift force, has ingenious conception and simple operation, can set different nonlinear wind speeds according to the users, the wing lifting force device has strong guiding and researching significance for researching the wing lifting force in actual life, is strong in practicability and is suitable for popularization and use.
Drawings
Fig. 1 is a perspective view of the first stereoscopic structural diagram of the present invention.
Fig. 2 is a perspective view of the present invention.
Fig. 3 is a perspective view three of the three-dimensional structure of the present invention.
Fig. 4 is a perspective view of the present invention.
Fig. 5 is a front view of the present invention.
Fig. 6 is a side view of the present invention.
Fig. 7 is a perspective view of the wind speed monitoring device according to the present invention.
Fig. 8 is a perspective view of a vertical displacement recording apparatus and its connecting parts according to the present invention.
Fig. 9 is a perspective view of a simulated wing and its connection part according to the present invention.
Fig. 10 is a partial perspective view of the vertical displacement recording apparatus of the present invention.
Fig. 11 is an enlarged view of the portion a of fig. 10 according to the present invention.
Fig. 12 is a perspective view of a rectangular frame structure of the vertical displacement recording apparatus according to the present invention.
Fig. 13 is a schematic perspective view of the vertical displacement recorder of the present invention with the first magnetic writing board removed.
Fig. 14 is a perspective view of a stopper pin in the vertical displacement recording apparatus of the present invention.
Fig. 15 is a perspective view of the lateral displacement recording apparatus of the present invention.
Fig. 16 is a perspective view showing a second magnetic writing pen and its connecting portion in the lateral displacement recording apparatus of the present invention.
Fig. 17 is a partial perspective view of an adjusting device according to the present invention.
Fig. 18 is a perspective view of the adjusting device of the present invention engaged with a U-shaped housing.
Reference numerals: 1. a measuring support; 2. a simulation chamber; 3. a slide rail; 4. a slider; 5. simulating a wing; 6. a first spring; an L-shaped rod; 8. a transverse slide rail; 9. a simulation board; 10. a second spring; 11. a round bar; 12. a circular air duct; 13. a fan; 14. a first motor; a U-shaped housing; 16. an elastic rubber sleeve; 17. an extension cavity; 18. a drive shaft; 19. a rotor blade; 20. a fixing ring; 21. a shaft sleeve; 22. a connecting rod; 23. a transition rod; 24. centrifuging the spheres; 25. a third spring; 26. a frame structure; 27. an inner gear ring; 28. a second motor; 29. a first gear; 30. a second gear; 31. a first magnetic drawing board; 32. a spacing pin; 33. anti-skid rubber particles; 34. a first magnetic writing board; 35. a fourth spring; 36. a second magnetic writing board; 37. an electric telescopic rod; 38. screwing the pin; 39. a second magnetic writing pen; 40. a fifth spring; 41. a support plate; 42. a first rectangular hydraulic cylinder; 43. a limiting frame; 44. a return spring; 45. a first rectangular hydraulic rod; 46. a hydraulic push rod; 47. a second rectangular hydraulic cylinder; 48. a second rectangular hydraulic rod; an L-shaped plate; 50. a drive handle; 51. and (3) anti-skid rubber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment one, with reference to fig. 1 to 18, a device for detecting wing lift force by simulating nonlinear wind speed, includes a measuring support 1, and is characterized in that the upper end of the measuring support 1 is connected to a transparent simulation cavity 2, a user can observe the device from outside, a slide rail 3 is vertically connected in the simulation cavity 2, the slide rail 3 is connected to the uppermost end in the simulation cavity 2, the slide rail 3 is located at the middle position in the simulation cavity 2, a slide block 4 is vertically and slidably connected in the slide rail 3, the right end of the slide rail 3 is closed, the cross section of a chute in the slide rail 3 is "T" -shaped, the cross section of the slide block 4 is also "T" -shaped, the open end is toward the left end, so that when wind blows, the wind blows onto the fixed slide rail 3 in the middle, the frictional resistance is minimized, the influence on the lift force calculation is minimized, the front and rear ends of the slide block 4 are respectively connected to a simulation wing 5, the simulation wing 5 is similar to an actual airplane wing, the angle of the wing can be changed in a test, so that under the angles of different wings, the wing lift force under different angles can be obtained, different experimental results can guide the actual life, a first spring 6 arranged in a slide way is connected between the upper end of a sliding block 4 and a simulation cavity 2, the position of the first spring 6 is positioned in a chute, the first spring 6 is not influenced by blowing, the upper end of the sliding block 4 is connected with an L-shaped rod 7 which is in sliding fit with the upper end of the simulation cavity 2 and penetrates upwards, the L-shaped rod 7 is connected with a vertical displacement recording device arranged at the upper end of the simulation cavity 2, the position movement of the wing in the vertical direction can be recorded, and the vertical displacement recording device can record the height of the wing lifted in the process under the influence of different nonlinear wind speeds, during the recording process, during the process facing the wind speed change, the acceleration in the change process is recorded, namely the acceleration is the slope of the recorded line, the lower end of the slide rail 3 is connected with a transverse slide rail 8, a simulation board 9 matched with the wind receiving surface of the wing is transversely and slidably connected in the transverse slide rail 8, the simulation board 9 does not simulate the upper and lower curved surfaces of the wing 5 and is only a single thin simulation board 9, the simulation board 9 is used for simulating the resistance during the wing ascending process, the resistance comprises the ascending resistance of various airplanes during the ascending process, because during the wing ascending process, different air resistance exists and is related to the air density and the wind speed, the simulation board 9 is characterized in that the left end of the simulation board 9 is connected with a second spring 10 arranged in the transverse slide rail 8, and the transverse slide rail 8 is closed on one end face facing the wind speed, the second spring 10 is arranged in the transverse sliding rail 8 and is not influenced by wind speed, one end of the simulation plate 9 is connected with a round rod 11 which is in transverse sliding fit with one side wall of the simulation cavity 2 and penetrates out of the side wall, the round rod 11 is connected with a transverse displacement recording device arranged on the side wall of the simulation cavity 2 to record the position movement of the simulation plate 9 in the transverse direction, the transverse displacement recording device is used for recording the friction resistance in the process, the driving force of the simulation plate 9 is the blowing resistance, so that the transverse displacement recording device can effectively record the friction resistance, the right end of the simulation cavity 2 is communicated with a transparent circular air channel 12 arranged on the measuring support 1, the diameter of the circular air channel 12 is at least larger than the length of the diagonal line of the simulation cavity 2, the circular air channel 12 is rotatably connected with a fan 13, the rotating shaft of the fan 13 is in driving connection with the output shaft of a first motor 14 arranged on the circular air channel 12 through a belt, the output power of the first electrical machine 14 is constant, that is, the rotational speed of the wind speed is fixed,
the lower end of the simulation cavity 2 is vertically matched with an inverted U-shaped shell 15 in a sliding manner, an elastic rubber sleeve 16 is connected between the upper end of the U-shaped shell 15 and an air channel, an adjusting device installed on the simulation cavity 2 is connected in the U-shaped shell 15, and the requirement that a user can sequentially change the position of the U-shaped shell 15 in the vertical direction relative to the simulation cavity 2 according to the adjustment of a tester through the adjusting device is met, so that the inclination angle of the elastic rubber sleeve 16 is changed, the air speed entering the simulation cavity 2 of the fan 13 is different under the condition that the position of the U-shaped shell 15 in the vertical direction is different, and the narrower the air speed is larger under the condition that the air quantity is constant, so that the adjustment and the change of different nonlinear air speeds are performed;
the first motor 14, the vertical displacement recording device, the transverse displacement recording device and the adjusting device are respectively connected with the controller, so that the situation that the measurement work of the wing lifting force under the nonlinear wind speed is completed by the cooperation of the parts driven by the controller is met, after the adjustment device has adjusted the channel sizes of the different channels, the first motor 14 is turned on, the wind speed is turned on, when the controller controls different nonlinear wind speeds, the lifting force and the friction force are recorded by matching with the vertical displacement recording device and the transverse displacement recording device, when the first spring 6 is in equilibrium, the lifting force is equal to the spring force of the first spring 6, which is equal to the product of the stiffness coefficient of the first spring 6 and the amount of deformation, and during variation, according to Newton's second quantification, the lift is equal to the sum of the frictional resistance and the product of the mass and the acceleration, and therefore the lift of the wing is measured and recorded.
Embodiment two, on the basis of embodiment one, combine figures 1-18, simulation chamber 2 upper end connect a wind speed monitoring device, wind speed monitoring device include with simulation chamber 2 upper end intercommunication extend the chamber 17, extend chamber 17 in rotation connect one extend to simulation chamber 2's transmission shaft 18, the axis of transmission shaft 18 and the lateral wall parallel and level that extends chamber 17, transmission shaft 18 on be connected with a plurality of place extend chamber 17 in multiunit rotating fan 19, a transmission shaft 18 coaxial arrangement solid fixed ring 20, transmission shaft 18 coaxial sliding connection one place solid fixed ring 20 upper end axle sleeve 21 in, solid fixed ring 20 along transmission shaft 18 radial equipartition articulated have three groups connecting rod 22, axle sleeve 21 along transmission shaft 18 radial equipartition articulated have three groups transition pole 23, connecting rod 22 and corresponding transition pole 23's tip articulated, and a centrifugal sphere 24 is hinged at the hinged position, a set of third spring 25 arranged outside the transmission shaft 18 is connected between the shaft sleeve 21 and the upper end of the transmission shaft 18, the transmission shaft 18 is provided with scales for indicating the moving position of the shaft sleeve 21, and under the condition of different air ducts with different sizes and different wind speeds, the rotating fan blades 19 are pushed to rotate, so that the rotating shaft rotates to drive the three sets of centrifugal spheres 24 to rotate centrifugally, the shaft sleeve 21 pulls the third spring 25 to deform, the position of the shaft sleeve 21 is changed to display the scale of the current position, and the deformation amount of the third spring 25 is increased, so that the wind speed is measured and calculated.
In the third embodiment, on the basis of the first or second embodiment, with reference to fig. 1 to 18, the vertical displacement recording device includes a regular hexagonal frame structure 26 rotatably connected to the upper end of the simulation cavity 2, the upper end of the frame structure 26 is coaxially connected to an inner gear ring 27, the upper end of the simulation cavity 2 is connected to a second motor 28, an output shaft of the second motor 28 is connected to a first gear 29, a second gear 30 rotatably connected to the upper end of the simulation cavity 2 is engaged between the first gear 29 and the inner gear ring 27, the first gear 29 is driven to rotate by the rotation of the second motor 28, and since the position of the second gear 30 engaged with the first gear is fixed, the inner gear ring 27 is driven to rotate, so as to change the position of the regular hexagonal frame, the controller is used to control the rotation speed of the regular hexagonal frame to exactly match the change of the wind speed in the test, each group of side surfaces of the frame structure 26 is vertically matched with a first magnetic writing board 31 in a sliding manner, two adjacent groups of first magnetic writing boards 31 are subjected to displacement limitation in the vertical direction through a limiting pin 32 which is matched with the frame structure 26 through threads, the lower end of the limiting pin 32 is connected with a plurality of groups of anti-skid rubber particles 33 which are matched with the upper end of the first magnetic writing board 31, and the position of the limiting pin 32 is rotated, so that the limiting pin 32 limits the first magnetic writing boards 31 to be drawn out from the frame structure 26;
the first magnetic writing pen 34 is in sliding fit with the end of the L-shaped rod 7, and is required to be not separated from the L-shaped rod 7, a fourth spring 35 is connected between the first magnetic writing pen 34 and the L-shaped rod 7, the first magnetic writing pen 34 is always in contact with the first magnetic writing board 31 due to the existence of the fourth spring 35, the first magnetic writing board 31 is matched with the first magnetic writing pen 34, the matching of the first magnetic writing pen 34 and the first magnetic writing pen is similar to a magnetic drawing board frequently used by children, the content on the writing board can be erased by pushing an eraser on the side surface of the first magnetic writing board 31, the first magnetic writing pen 34 is matched with the first magnetic writing board 31 for recording, and grid-shaped scale lines are arranged on the first magnetic writing board 31 and used for representing displacement change of the simulated wing 5 in the vertical direction;
the second motor 28 is connected with the controller, the controller controls the second motor 28 to work, and the controller controls the second motor 28 to work in a certain time sequence, so that the second motor is matched with the experimental process, and the six groups of writing boards can completely record the displacement change in the experimental process.
Fourth embodiment, on the basis of the first or second embodiment, with reference to fig. 1 to 18, the lateral displacement recording apparatus includes a second magnetic writing board 36 vertically slidably fitted on the rear side wall of the simulation chamber 2, an electric telescopic rod 37 disposed at the upper end of the second magnetic writing board 36 is mounted on the side wall of the simulation chamber 2, the lower end of the electric telescopic rod 37 is connected to the upper end of the second magnetic writing board 36 through a movable screwing pin 38, the second magnetic writing board 36 is inserted into the electric telescopic rod 37, and then the screwing pin 38 is used to fix the two, the end of the round bar 11 slidably fits a second magnetic writing pen 39 and is not separated, a fifth spring 40 is connected between the second magnetic writing pen 39 and the round bar 11, and the second magnetic writing pen 39 and the second magnetic writing board 36 cooperate with each other to perform writing work, the existence of the fifth spring 40 enables the second magnetic writing pen 39 to be always in contact with the second magnetic writing board 36, the second magnetic writing board 36 and the second magnetic writing pen 39 are matched, the matching of the second magnetic writing board 36 and the second magnetic writing pen 39 is similar to a magnetic drawing board frequently used by children, the contents on the writing board can be erased by a pushing rubber on the side surface of the second magnetic writing board 36, and the side of the second magnetic writing board 36 facing the simulation cavity 2 is provided with grid-type scale lines for representing the displacement change of the simulation board 9 in the transverse direction, so that the frictional resistance is measured and calculated;
the electric telescopic rod 37 connect the controller, and the controller controls the electric telescopic rod 37 to work in a certain time sequence, so that the electric telescopic rod is matched with the experimental process, and the second magnetic writing board 36 can completely record the displacement change in the experimental process.
Fifth embodiment, on the basis of the first or second embodiment, with reference to fig. 1 to 18, the adjusting device includes a supporting plate 41 longitudinally connected in the simulation chamber 2 and disposed in the U-shaped housing 15, the supporting plate 41 is disposed at the bottom end of the simulation chamber 2, six sets of first rectangular hydraulic cylinders 42 vertically slidably fitted on the supporting plate 41 are longitudinally and evenly distributed on the supporting plate 41 at intervals, a limiting frame 43 for limiting the rectangular hydraulic cylinders to be disengaged from the supporting plate 41 downward is disposed on the first rectangular hydraulic cylinders 42, a plurality of sets of return springs 44 are connected between the U-shaped housing 15 and the inner side wall of the simulation chamber 2, after the U-shaped housing 15 is lifted upward, the U-shaped housing 15 is still at an initial position by the return springs 44, the lower end of the first rectangular hydraulic cylinders 42 is connected with a first rectangular hydraulic rod 45 through piston fitting, and hydraulic push rods 46 matched with the six sets of first rectangular hydraulic rods 45 are longitudinally and evenly distributed on the measuring support 1 at intervals The six groups of hydraulic push rods 46 are communicated with a main hydraulic cylinder, the main hydraulic cylinder is connected with a controller, the controller is satisfied that the hydraulic push rods 46 are sequentially pushed to a specified position from front to back through the hydraulic cylinders, and only one group of hydraulic push rods 46 are driven and pushed each time;
six groups of second rectangular hydraulic cylinders 47 are sequentially connected to the side wall of the simulation cavity 2 from left to right, the upper end of the second rectangular hydraulic cylinder 47 is connected with a second rectangular hydraulic rod 48 through a piston in a matching way, six groups of second rectangular hydraulic cylinders 47 from left to right are respectively communicated with six groups of first rectangular hydraulic cylinders 42 from front to back in a one-to-one way through pipelines, and the pipeline is provided with an electromagnetic valve which is connected with a controller and satisfies the on-off state of the electromagnetic valve controlled by the controller, and the upper end of the first rectangular hydraulic cylinder 42 communicates with the upper end of the corresponding second rectangular hydraulic cylinder 47, an L-shaped plate 49 is connected to the side wall of the simulation cabin, the upper end of the second rectangular hydraulic rod 48 is connected with a driving handle 50, six groups of driving handles 50 are in sliding fit with the L-shaped plate 49, the driving handle 50 is provided with an anti-skid rubber sleeve 51, and the front end of the L-shaped plate 49 is provided with scale marks; in the process of pushing the driving handle 50 upwards or downwards, the first rectangular hydraulic rod 45 moves downwards or downwards, and since the hydraulic cylinders above the first rectangular hydraulic rod 45 and the second rectangular hydraulic rod 48 are communicated, the moving directions of the first rectangular hydraulic rod 45 and the second rectangular hydraulic rod 48 are opposite, after the six groups of first rectangular hydraulic rods 45 are adjusted by a user, the controller sequentially drives the hydraulic push rods 46 to move from front to back each time, so that the hydraulic push rods 46 are matched with the first rectangular hydraulic rods 45 above correspondingly, the U-shaped shell 15 on the hydraulic push rods is pushed to the heights of different positions determined by the user, the size of the air channel is sequentially changed, and therefore different nonlinear air speeds are adjusted.
When the invention is used, firstly, six groups of electromagnetic valves are opened through the controller, the first rectangular hydraulic rod 45 is sequentially adjusted from front to back, the electromagnetic valves are closed after adjustment, then the controller sequentially pushes the hydraulic push rods 46 from front to back through the master hydraulic cylinder, so that the size of the air channel is sequentially changed, so that different nonlinear wind speeds are adjusted, then the first motor 14 is opened, so that the fan 13 is opened, after the fan 13 is opened, the situation of the wing 5 at different wind speeds is simulated, different positions are changed in the vertical direction, the positions of the simulated wing 5 at different vertical positions are recorded under the coordination of the first magnetic writing pen 34 and the first magnetic writing board 31, wherein the acceleration is the slope of a recording line at the current wind speed, and simultaneously, under the coordination of the second magnetic writing pen 39 and the second magnetic writing board 36, the positions of the simulation plate 9 in different transverse directions are recorded, so that the frictional resistance at different wind speeds is obtained, the wing lift force is measured and calculated through a second Newton's law, the wing lift force at the nonlinear wind speed is measured, calculated and recorded, and the device is recovered to the initial state.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A device for detecting the lift force of a wing by simulating the nonlinear wind speed comprises a measuring support (1) and is characterized in that the upper end of the measuring support (1) is connected with a transparent simulation cavity (2), the simulation cavity (2) is internally vertically connected with a slide rail (3), the slide rail (3) is internally vertically and slidably connected with a slide block (4), the front end and the rear end of the slide block (4) are respectively connected with a simulation wing (5), a first spring (6) arranged in a slide way is connected between the upper end of the slide block (4) and the simulation cavity (2), the upper end of the slide block (4) is connected with an L-shaped rod (7) which is in sliding fit with the upper end of the simulation cavity (2) and penetrates out upwards, the L-shaped rod (7) is connected with a vertical displacement recording device arranged at the upper end of the simulation cavity (2), and the position movement of the wing in the vertical direction is recorded, slide rail (3) lower extreme connect a horizontal slide rail (8), horizontal slide rail (8) in horizontal sliding connection one with the wing wind-engaging face assorted simulation board (9), the left end of simulation board (9) connect one arrange in second spring (10) in horizontal slide rail (8), the one end of simulation board (9) connect one with simulation chamber (2) a lateral wall horizontal sliding fit and wear out round bar (11) of lateral wall, round bar (11) connect one and install the lateral displacement recorder on simulation chamber (2) lateral wall, satisfy and carry out the record to the position removal of simulation board (9) on horizontal direction, the right-hand member intercommunication one of simulation chamber (2) install transparent circular wind channel (12) on measuring support (1), circular wind channel (12) internal rotation connect a fan (13), the pivot of fan (13) and the output shaft of installing first motor (14) on circular wind channel (12) through the belt (12) The lower end of the simulation cavity (2) is vertically matched with an inverted U-shaped shell (15) in a sliding manner, an elastic rubber sleeve (16) is connected between the upper end of the U-shaped shell (15) and the air channel, and the U-shaped shell (15) is internally connected with an adjusting device arranged on the simulation cavity (2), so that a user can sequentially change the position of the U-shaped shell (15) in the vertical direction relative to the simulation cavity (2) according to the adjustment of a tester through the adjusting device, and the inclination angle of the elastic rubber sleeve (16) is changed so as to change the air speed entering the simulation cavity (2);
the first motor (14), the vertical displacement recording device, the transverse displacement recording device and the adjusting device are respectively connected with the controller, and the situation that the lifting force of the wing under the nonlinear wind speed is measured by the cooperation of the parts driven by the controller is met.
2. The device for simulating the non-linear wind speed to detect the lift force of the wing according to claim 1, wherein the upper end of the simulation cavity (2) is connected with a wind speed monitoring device, the wind speed monitoring device comprises an extension cavity (17) communicated with the upper end of the simulation cavity (2), the extension cavity (17) is rotatably connected with a transmission shaft (18) of the extension simulation cavity (2), the transmission shaft (18) is connected with a plurality of groups of rotating fan blades (19) arranged in the extension cavity (17), the transmission shaft (18) is coaxially provided with a fixing ring (20), the transmission shaft (18) is coaxially slidably connected with a shaft sleeve (21) arranged at the upper end of the fixing ring (20), the fixing ring (20) is radially and uniformly hinged with three groups of connecting rods (22) along the transmission shaft (18), the shaft sleeve (21) is radially and uniformly hinged with three groups of transition rods (23) along the transmission shaft (18), the connecting rod (22) is hinged with the end part of the corresponding transition rod (23), a centrifugal sphere (24) is hinged at the hinged position, a third spring (25) sleeved outside the transmission shaft (18) is connected between the shaft sleeve (21) and the upper end of the transmission shaft (18), and the transmission shaft (18) is provided with scales for indicating the moving position of the shaft sleeve (21).
3. The device for simulating the non-linear wind speed to detect the wing lift force according to the claim 1 or 2, characterized in that the vertical displacement recording device comprises a regular hexagon frame structure (26) rotatably connected to the upper end of the simulation cavity (2), the upper end of the frame structure (26) is coaxially connected with an inner gear ring (27), the upper end of the simulation cavity (2) is connected with a second motor (28), an output shaft of the second motor (28) is connected with a first gear (29), a second gear (30) rotatably connected to the upper end of the simulation cavity (2) is meshed between the first gear (29) and the inner gear ring (27), each group of side surfaces of the frame structure (26) is vertically and slidably matched with a first magnetic writing board (31), and displacement limitation in the vertical direction is performed between two adjacent groups of the first magnetic writing boards (31) through a limiting pin (32) which is in threaded fit on the frame structure (26), the lower end of the limiting pin (32) is connected with a plurality of groups of anti-skid rubber particles (33) matched with the upper end of the first magnetic writing board;
the magnetic pen is characterized by further comprising a first magnetic writing pen (34) which is in sliding fit with the end portion of the L-shaped rod (7) and cannot be separated, a fourth spring (35) is connected between the first magnetic writing pen (34) and the L-shaped rod (7), the first magnetic writing pen (34) is matched with a first magnetic writing board for recording, and latticed scale marks are arranged on the first magnetic writing board;
the second motor (28) is connected with the controller, and the second motor (28) is controlled to work by the controller.
4. The lift device for simulating the non-linear wind speed detection wing of claim 1 or 2, wherein the lateral displacement recording device comprises a second magnetic writing board (36) which is vertically matched with the rear side wall of the simulation cavity (2) in a sliding manner, an electric telescopic rod (37) arranged at the upper end of the second magnetic writing board (36) is arranged on the side wall of the simulation cavity (2), the lower end of the electric telescopic rod (37) is connected with the upper end of the second magnetic writing board (36) through a movable screwing pin (38), the end part of the round rod (11) is matched with a second magnetic writing pen (39) in a sliding manner and is not separated from the second magnetic writing pen, a fifth spring (40) is connected between the second magnetic writing pen (39) and the round rod (11), and the second magnetic writing pen (39) and the second magnetic writing board (36) are matched with the boards for writing work, one side of the second magnetic writing board (36) facing the simulation cavity (2) is provided with grid-type scale marks;
the electric telescopic rod (37) is connected with the controller, and the controller is satisfied to control the electric telescopic rod (37) to work.
5. The wing lift force device for simulating the non-linear wind speed detection according to claim 1 or 2, wherein the adjusting device comprises a support plate (41) longitudinally connected in the simulation cavity (2) and arranged in a U-shaped shell (15), six groups of first rectangular hydraulic cylinders (42) vertically matched with the support plate (41) in a sliding manner are uniformly distributed on the support plate (41) at intervals along the longitudinal direction, a limit frame (43) used for limiting the rectangular hydraulic cylinders to be downwards separated from the support plate (41) is arranged on the first rectangular hydraulic cylinders (42), a plurality of groups of reset springs (44) are connected between the U-shaped shell (15) and the inner side wall of the simulation cavity (2), the lower ends of the first rectangular hydraulic cylinders (42) are connected with a first rectangular hydraulic rod (45) in a matching manner through pistons, hydraulic push rods (46) matched with the six groups of first rectangular hydraulic rods (45) are longitudinally and uniformly distributed on the measuring support (1) at intervals, the six groups of hydraulic push rods (46) are communicated with a main hydraulic cylinder, the main hydraulic cylinder is connected with a controller, the controller is satisfied that the hydraulic push rods (46) are sequentially pushed to a specified position from front to back through the hydraulic cylinders, and only one group of hydraulic push rods (46) is driven and pushed each time;
the simulation cavity (2) side wall on from the left to the right have connected gradually six groups of second rectangle pneumatic cylinders (47), second rectangle pneumatic cylinder (47) upper end through piston cooperation connect a second rectangle hydraulic stem (48), six groups of second rectangle pneumatic cylinders (47) from the left to the right respectively with from preceding six groups of first rectangle pneumatic cylinders (42) of back carry out one to one intercommunication through the pipeline, and be provided with the solenoid valve on the pipeline, solenoid valve connection director, satisfy the on-off state of controller control solenoid valve, and the upper end of first rectangle pneumatic cylinder (42) is linked together with the upper end of corresponding second rectangle pneumatic cylinder (47), the simulation cavity side wall on connect an L shaped plate (49), the upper end of second rectangle hydraulic stem (48) connect a drive handle (50), six groups drive handle (50) sliding fit on L shaped plate (49), an anti-skidding rubber sleeve (51) is arranged on the driving handle (50), and scale marks are arranged at the front end of the L-shaped plate (49).
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| CN112924714B (en) * | 2021-02-19 | 2023-02-24 | 浪潮电子信息产业股份有限公司 | Wind speed measuring device and server |
| CN116659726B (en) * | 2023-07-25 | 2023-10-31 | 安徽羲禾航空科技有限公司 | Aviation propeller thrust measurement equipment and measurement method |
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