Translation mechanism of turntable door for wind tunnel test
By using rack and rack transmission and piston spray lubricant in wind tunnel tests, the problem of screw bending during turntable door movement is solved, and the long-term stable operation of the translation mechanism and wear reduction is achieved.
Patent Information
- Application Number
- CN202421443891.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-24
AI Technical Summary
In the existing wind tunnel test, the movement of the turntable door is often driven by a screw, which causes the screw to bend too long and may be affected by the long-term stable operation of the translation mechanism.
Rack and rack transmission is used instead of screw transmission, and lubricating oil is sprayed through the movement of the piston to reduce wear between the slider and the translation track.
The screw bending is avoided, and the long and smooth operation of the translation mechanism is achieved, which reduces the cost of later maintenance and reduces wear between the slider and the translation track through lubricating oil.
Smart Images
Figure CN222761843U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind tunnel tests, in particular to a translation mechanism of a turntable door for wind tunnel tests. Background Art
[0002] The airfoil model of the wind tunnel is a commonly used mechanism in scientific research and production, especially in the design of aerospace vehicles and other fields. The airfoil model is installed on the turntable door of the wind tunnel test section. The installation accuracy in the wind tunnel directly affects the accuracy of the test data, and the installation speed of the model significantly affects the efficiency of the experiment. The turntable door is the most important component in the binary wind tunnel test section. In the binary wind tunnel test, almost all airfoil tests rely on the turntable door to complete.
[0003] During the wind tunnel test, the turntable door needs to be moved. The movement of the existing turntable door usually utilizes the rotation of the lead screw to move the moving carriage, thereby completing the transportation of the turntable door. Due to the long transportation distance, the length of the lead screw is set to be long, which may cause the lead screw to bend. Therefore, it is necessary to design a translation mechanism for the turntable door for wind tunnel testing to solve the above problem. Utility Model Content
[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose a translation mechanism for a turntable door for a wind tunnel test. The translation mechanism utilizes a rack and pinion transmission instead of a screw transmission, which can avoid the bending of the screw due to excessive length of the screw, so that the translation mechanism can operate smoothly for a long time, and lubricating oil can be sprayed through the movement of the piston to reduce the wear between the slider and the translation track.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A translation mechanism for a turntable door for a wind tunnel test comprises a placement plate, a moving carriage is installed on the upper end of the placement plate, a driving assembly is installed on the upper end of the placement plate, two hot-pressed channel steels are provided below the placement plate, a standard rack is provided between the two hot-pressed channel steels, a coupling is installed at the lower end of the placement plate, the input end of the coupling is fixedly connected to the output end of the driving assembly, a gear support frame is installed at the lower end of the placement plate, an angular contact bearing is installed on the gear support frame, and the output end of the coupling passes through the angular contact bearing and is fixedly connected to a cylindrical gear.
[0007] Preferably, a plurality of translation tracks are provided below the placement plate, and sliders are slidably connected to the plurality of translation tracks, and the upper ends of the plurality of sliders are fixedly connected to the lower end of the placement plate.
[0008] Preferably, the driving assembly comprises a servo motor and a reducer, the output shaft of the servo motor is fixedly connected to the input shaft of the reducer, and the output shaft of the reducer is fixedly connected to the input shaft of the coupling.
[0009] Preferably, a plurality of the sliding blocks are each provided with a spray chamber, a plurality of liquid outlets are each provided at the lower end of the plurality of the spray chambers, a liquid storage tank is each provided on the front and rear inner walls of the moving carriage, a rectangular box is fixedly connected to the front and rear inner walls of the moving carriage, a threaded rod is rotatably connected to the inner bottom of the rectangular box, a moving block is threadedly connected to the threaded rod, a piston is sealingly and slidably connected to the inside of the rectangular box, adjacent sides of the moving block and the piston are commonly and fixedly connected with a connecting rod, the bottom space of the two rectangular boxes is connected to the liquid storage tank through a liquid inlet pipe, and the bottom space of the rectangular box is connected to the corresponding spray chamber through a liquid outlet pipe.
[0010] Preferably, each of the plurality of liquid inlet pipes and liquid outlet pipes is provided with a one-way valve.
[0011] Preferably, the upper end of the threaded rod extends to the outside of the rectangular box, a disc motor is mounted on the rectangular box, and the output end of the disc motor is fixedly connected to the upper end of the threaded rod.
[0012] Compared with the existing technology, the advantages of this device are:
[0013] 1. Compared with the prior art, the driving assembly drives the gear to rotate, so that the moving carriage moves under the action of the standard rack, which can enable the translation mechanism to run smoothly for a long time and reduce the cost of later maintenance;
[0014] 2. Compared with the prior art, through the setting of the piston, when the friction between the translation track and the slider is large during operation, lubricating oil can be added between the slider and the translation track by running the disc motor to reduce the wear between the slider and the translation track. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a structural schematic diagram of a translation mechanism of a turntable door for wind tunnel testing proposed by the utility model;
[0016] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;
[0017] Figure 3 for Figure 1 Left side view;
[0018] Figure 4 for Figure 3 The enlarged structural diagram at B in the middle;
[0019] Figure 5 for Figure 1 Top view of the .
[0020] In the figure: 1 placement plate, 2 moving carriage, 3 driving assembly, 4 hot-pressed channel steel, 5 translation rail, 6 standard rack, 7 cylindrical gear, 8 angular contact bearing, 9 gear support frame, 10 coupling, 11 liquid storage tank, 12 spray chamber, 13 slider, 14 rectangular box, 15 threaded rod, 16 piston, 17 liquid inlet pipe, 18 liquid outlet pipe. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0022] Reference Figure 1-Figure 5 A translation mechanism of a turntable door for a wind tunnel test comprises a placing plate 1, a moving carriage 2 is installed on the upper end of the placing plate 1, a driving assembly 3 is installed on the upper end of the placing plate 1, the driving assembly 3 comprises a servo motor and a reducer, the output shaft of the servo motor is fixedly connected to the input shaft of the reducer, the output shaft of the reducer is fixedly connected to the input shaft of the coupling 10, a translation track 5 is arranged below the placing plate 1, the translation track 5 is fixedly connected to the hot-pressed channel steel 4, a standard rack 6 is arranged between the two hot-pressed channel steels 4, a coupling 10 is installed at the lower end of the placing plate 1, and the coupling 1 The input end of 0 is fixedly connected with the output end of the driving assembly 3, a gear support frame 9 is installed at the lower end of the placement plate 1, an angular contact bearing 8 is installed on the gear support frame 9, the output end of the coupling 10 passes through the angular contact bearing 8 and is fixedly connected with a cylindrical gear 7, the straightness of the standard rack 6 and the translation rail 5 are both 0.01, the installation parallelism between the standard rack and the two translation rails 5 should be within 0.03, the height difference between the two translation rails 5 is not greater than 0.03, and the meshing line between the standard rack 6 and the cylindrical gear 7 coincides with the longitudinal center line of the moving carriage 2.
[0023] Among them, a plurality of translation rails 5 are provided under the placement plate 1, and sliders 13 are slidably connected to the plurality of translation rails 5. The upper ends of the plurality of sliders 13 are fixedly connected to the lower end of the placement plate 1. The placement plate 1 is fixed on four sliders 13, and its installation level should be within 0.03.
[0024] Among them, multiple sliders 13 are each provided with a spray chamber 12, and the lower ends of multiple spray chambers 12 are each provided with multiple liquid outlets. Liquid storage tanks 11 are each provided on the inner walls of the front and rear sides of the mobile carriage 2. The inner walls of the front and rear sides of the mobile carriage 2 are both fixedly connected with rectangular boxes 14. The inner bottom of the rectangular box 14 is rotatably connected with a threaded rod 15, and a moving block is threadedly connected to the threaded rod 15. A piston 16 is sealed and slidably connected in the rectangular box 14, and the adjacent sides of the moving block and the piston 16 are commonly fixedly connected with a connecting rod. The bottom spaces of the two rectangular boxes 14 are connected to the liquid storage tank 11 through a liquid inlet pipe 17, and the bottom spaces of the rectangular boxes 14 are connected to the corresponding spray chambers 12 through The liquid outlet pipe 18 is connected, and a plurality of liquid inlet pipes 17 and liquid outlet pipes 18 are provided with a one-way valve. An air port is provided at the upper end of the liquid storage tank 11, and the liquid storage tank 11 is filled with lubricating oil. The lubricating oil in the liquid storage tank 11 enters the rectangular box 14 in one direction through the liquid inlet pipe 17, and the lubricating oil in the rectangular box 14 enters the spray chamber 12 in one direction through the liquid outlet pipe 18. The top space of the rectangular box 14 is connected with the outside through a connecting port, and the upper end of the threaded rod 15 extends to the outside of the rectangular box 14. A disc motor is installed on the rectangular box 14, and the output end of the disc motor is fixedly connected to the upper end of the threaded rod 15. The operation of the disc motor is used to rotate the threaded rod 15.
[0025] The functional principle of the utility model can be explained through the following operation mode: the turntable door is placed in the moving carriage 2, and the servo motor on the driving assembly 3 is started, so that the cylindrical gear 7 rotates, and then under the action of the standard rack 6, the slider 13 drives the placement plate 1 and the moving carriage 2 to move, so as to translate the position of the turntable door;
[0026] When the friction between the slider 13 and the translation track 5 is large, the staff can start the disc motor to rotate the threaded rod 15, so that the moving block drives the piston 16 to move downward, thereby pressing the lubricating oil under the piston 16 into between the slider 13 and the translation track 5, thereby reducing the wear between the slider 13 and the translation track 5;
[0027] When the lubricating oil in the rectangular box 14 is less, the output shaft of the disc motor can be controlled to rotate in the opposite direction, so that the lubricating oil in the liquid storage tank 11 can be pumped into the bottom of the rectangular box 14 .
[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A translation mechanism for a turntable door for a wind tunnel test, comprising a placement plate (1), characterized in that: A movable carriage (2) is installed at the upper end of the placement plate (1), a driving assembly (3) is installed at the upper end of the placement plate (1), two hot-pressed channel steels (4) are provided below the placement plate (1), a standard rack (6) is provided between the two hot-pressed channel steels (4), a coupling (10) is installed at the lower end of the placement plate (1), an input end of the coupling (10) is fixedly connected to an output end of the driving assembly (3), a gear support frame (9) is installed at the lower end of the placement plate (1), an angular contact bearing (8) is installed on the gear support frame (9), and the output end of the coupling (10) passes through the angular contact bearing (8) and is fixedly connected to a cylindrical gear (7).
2. The translation mechanism of a turntable door for wind tunnel testing according to claim 1, characterized in that: A plurality of translation rails (5) are provided below the placement plate (1), and a slider (13) is slidably connected to each of the plurality of translation rails (5), and the upper ends of the plurality of sliders (13) are fixedly connected to the lower end of the placement plate (1).
3. The translation mechanism of a turntable door for wind tunnel testing according to claim 1, characterized in that: The drive assembly (3) comprises a servo motor and a reducer, wherein the output shaft of the servo motor is fixedly connected to the input shaft of the reducer, and the output shaft of the reducer is fixedly connected to the input shaft of the coupling (10).
4. The translation mechanism of a turntable door for wind tunnel testing according to claim 2, characterized in that: A plurality of the sliders (13) are each provided with a spray chamber (12), and a plurality of liquid outlets are each provided at the lower end of the plurality of the spray chambers (12). A liquid storage tank (11) is each provided on the inner walls on both the front and rear sides of the movable carriage (2). A rectangular box (14) is fixedly connected to the inner walls on both the front and rear sides of the movable carriage (2). A threaded rod (15) is rotatably connected to the inner bottom of the rectangular box (14), and a moving block is threadedly connected to the threaded rod (15). A piston (16) is sealingly and slidably connected to the rectangular box (14), and adjacent sides of the moving block and the piston (16) are fixedly connected to a connecting rod. The bottom spaces of the two rectangular boxes (14) are connected to the liquid storage tank (11) via a liquid inlet pipe (17), and the bottom spaces of the rectangular boxes (14) are connected to the corresponding spray chamber (12) via a liquid outlet pipe (18).
5. The translation mechanism of the turntable door for wind tunnel testing according to claim 4, characterized in that: A check valve is provided on each of the plurality of liquid inlet pipes (17) and liquid outlet pipes (18).
6. The translation mechanism of a turntable door for wind tunnel testing according to claim 4, characterized in that: The upper end of the threaded rod (15) extends to the outside of the rectangular box (14), a disc motor is mounted on the rectangular box (14), and the output end of the disc motor is fixedly connected to the upper end of the threaded rod (15).