CN114486168B - Three-degree-of-freedom model flight test angle limiting device - Google Patents
Three-degree-of-freedom model flight test angle limiting device Download PDFInfo
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- CN114486168B CN114486168B CN202210411923.0A CN202210411923A CN114486168B CN 114486168 B CN114486168 B CN 114486168B CN 202210411923 A CN202210411923 A CN 202210411923A CN 114486168 B CN114486168 B CN 114486168B
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- angle limiting
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- spherical hinge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
Abstract
The invention belongs to the field of wind tunnel tests and relates to a three-degree-of-freedom model flight test angle limiting device. The spherical hinge comprises a spherical hinge and a spherical hinge support rod, wherein the spherical hinge is connected with the spherical hinge support rod, and the spherical hinge further comprises a spherical hinge connecting plate, an upper angle limiting block, a connecting piece and a lower angle limiting block; the spherical hinge is fixedly connected with the spherical hinge connecting plate; four sliding tables are uniformly arranged on the spherical hinge connecting plate; a first sliding groove matched with the sliding table is formed in the upper angle limiting block in the axial direction of the upper angle limiting block, and a second sliding groove is formed in the upper angle limiting block in the circumferential direction of the upper angle limiting block; the upper angle limiting block is fixedly connected with the connecting piece, and the connecting piece is rotatably connected with the lower angle limiting block; a positioning block matched with the second sliding groove is arranged on the lower angle limiting block; the lower angle limiting block fixes the spherical hinge supporting rod. The invention has the effect of limiting the pitching, rolling and yawing motions of the airplane model, improves the safety performance of the device and ensures the safe operation of the test.
Description
Technical Field
The invention belongs to the field of wind tunnel tests, and particularly relates to a three-degree-of-freedom model flight test angle limiting device.
Background
The wind tunnel test is an aerodynamic test method for arranging an aircraft or other object model in a wind tunnel, researching gas flow and interaction between the gas flow and the model and knowing the aerodynamic characteristics of the actual aircraft or other objects.
During an aircraft flight wind tunnel test, a standard spherical hinge is usually adopted to support an aircraft model, so that the aircraft model can make rotary motion in three directions along the center of the spherical hinge, and pitching, rolling and yawing motions of the aircraft model are realized; because the motion stroke of the spherical hinge is often greater than the test angle range of the airplane model, after the motion range of the model exceeds the limit, the airplane model is easily damaged, the test safety is affected, and certain potential safety hazards exist. The present invention thus provides a device with a limited range of angular motion of the model.
Disclosure of Invention
The invention provides a three-degree-of-freedom model flight test angle limiting device which has the effect of limiting pitching, rolling and yawing motions of an airplane model, improves the safety performance of the device and ensures the safe operation of a test.
The invention is realized by the following technical scheme;
the invention provides a three-degree-of-freedom model flight test angle limiting device which comprises a spherical hinge, a spherical hinge supporting rod, a spherical hinge connecting plate, an upper angle limiting block, a connecting piece and a lower angle limiting block, wherein the spherical hinge is connected with the spherical hinge supporting rod;
the spherical hinge is fixedly connected with the spherical hinge connecting plate;
four sliding tables are uniformly arranged on the spherical hinge connecting plate;
a first sliding groove matched with the sliding table is formed in the upper angle limiting block in the axial direction of the upper angle limiting block, and a second sliding groove is formed in the upper angle limiting block in the circumferential direction of the upper angle limiting block; the first sliding groove and the second sliding groove are respectively positioned at two ends of the upper angle limiting block;
the upper angle limiting block is fixedly connected with the connecting piece, and the connecting piece is rotatably connected with the lower angle limiting block;
a positioning block matched with the second sliding groove is arranged on the lower angle limiting block; the lower angle limiting block is connected with the spherical hinge supporting rod.
Further, still include the fixing base, the fixing base is connected to ball pivot branch, angle stopper under the fixing base connection.
Furthermore, the fixed seat and the spherical hinge support are connected in a clamping manner.
Furthermore, a clamping groove is formed in the spherical hinge supporting rod, and a protrusion matched with the clamping groove is formed in the fixing seat.
Furthermore, the clamping grooves are provided with a plurality of groups, and the plurality of groups of clamping grooves are arranged at intervals along the axial direction of the spherical hinge supporting rod.
Further, the fixing base includes fixing base one and fixing base two, fixing base one and fixing base two joint are in on the ball pivot branch.
Furthermore, the connecting piece comprises a connecting block and a needle bearing, one end of the connecting block is fixedly connected with the upper angle limiting block, and the other end of the connecting block is connected with the lower angle limiting block through the needle bearing.
Further, the needle roller bearings are arranged in two.
Furthermore, the upper angle limiting block is conical, a first sliding groove is formed in the end, with the large diameter, of the upper angle limiting block, and a second sliding groove is formed in the end, with the small diameter, of the upper angle limiting block.
By adopting the technical scheme, the invention has the following advantages:
1. the invention has the effect of limiting the pitching, rolling and yawing motions of the airplane model, improves the safety performance of the device and ensures the safe operation of the test.
2. The fixing seat has the function of supporting the angle limiting block, so that the safety of the device is improved, and the safety of the test is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of a three-degree-of-freedom model flight test angle limiting device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a three-degree-of-freedom model flight test angle limiting device in an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a first schematic view of a connection relationship between an upper angle limiting block and a spherical hinge connecting plate in the embodiment of the invention;
FIG. 5 is a schematic diagram II of a connection relationship between an upper angle limiting block and a spherical hinge connecting plate in the embodiment of the invention;
FIG. 6 is a schematic structural diagram of an upper angle limiting block in the embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a lower angle limiting block according to an embodiment of the present disclosure;
FIG. 8 is a schematic view of a connection relationship between an upper angle limiting block and a lower angle limiting block in the embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a first fixing base according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a second fixing base according to an embodiment of the present invention;
FIG. 11 is a schematic structural view of a ball-and-socket joint support bar in an embodiment of the present invention;
in the drawings: 10-spherical hinge, 20-spherical hinge support rod, 21-clamping groove, 30-spherical hinge connecting plate, 31-sliding table, 40-upper angle limiting block, 41-sliding groove I, 42-sliding groove II, 50-connecting piece, 51-connecting block, 52-needle bearing, 60-lower angle limiting block, 61-positioning block, 70-fixing seat, 71-fixing seat I, 72-fixing seat II, 700-boss and 701-supporting table.
Detailed Description
The following description provides many different embodiments, or examples, for implementing different features of the invention. The particular examples set forth below are illustrative only and are not intended to be limiting.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, fig. 2, and fig. 3, this embodiment provides a three-degree-of-freedom model flight test angle limiting device, which includes a spherical hinge 10, a spherical hinge support rod 20, a spherical hinge connecting plate 30, an upper angle limiting block 40, a connecting piece 50, and a lower angle limiting block 60, wherein the spherical hinge 10 is connected to the spherical hinge support rod 20; during testing, the spherical hinge is required to be connected with an airplane model;
the spherical hinge 10 is fixedly connected with a spherical hinge connecting plate 30;
as shown in fig. 4 and 5, four sliding tables 31 are uniformly arranged on the spherical hinge connecting plate 30, and a first sliding groove 41 is arranged at the upper end of the upper angle limiting block 40 along the axial direction of the upper angle limiting block 40, that is, the first sliding groove 41 is arranged along the axial direction of the upper angle limiting block 40 in an extending manner; the four sliding tables 31 are arranged in the first sliding grooves 41 of the upper angle limiting block 40, and the spherical hinge connecting plate 30 can slide in the upper angle limiting block 40, so that the airplane model connected to the spherical hinge 10 has pitching and rolling motions;
the upper angle limiting block 40 is fixedly connected with the connecting piece 50, and the connecting piece 50 is rotatably connected with the lower angle limiting block 60;
as shown in fig. 6, 7 and 8, a second sliding groove 42 is arranged at the lower end of the upper angle limiting block 40 along the circumferential direction of the upper angle limiting block 40, that is, the second sliding groove 42 extends along the circumferential direction of the upper angle limiting block 40, and a positioning block 61 matched with the second sliding groove 42 is arranged on the lower angle limiting block 60; the upper angle limiting block 40 rotates relative to the lower angle limiting block 60, so that the airplane model connected to the spherical hinge 10 has yaw motion;
the lower angle limiting block 60 is connected to the spherical hinge support rod 20.
As shown in fig. 4, further, in some embodiments, the hinge module further includes a fixing seat 70, the ball-and-socket joint strut 20 is connected to the fixing seat 70, and the fixing seat 70 is connected to the lower angle limiting block 60. The fixing seat 70 has the function of supporting the lower angle limiting block 60, so that the safety of the device is improved, and the safety of the test is ensured.
Further, in some embodiments, the fixing seat 70 is connected to the ball-hinge rod 20 in a snap-fit manner. As shown in fig. 3, 9, 10 and 11, a clamping groove 21 is formed on the ball-hinged support rod 20, a protrusion matched with the clamping groove 21 is formed on the fixed seat 70, and the clamping groove 21 is matched with the protrusion to realize connection, namely clamping; of course, the specific clamping may also be realized by arranging a first protrusion on the ball pivot support rod 20 and a first clamping groove on the fixing seat 70, so that the first protrusion and the first clamping groove are matched to realize the clamping. It should be noted that: the specific clamping manner is not limited to the exemplary manner. The clamping connection mode is simple, and the clamping connection can also enable the fixed seat 70 to have better supporting force; the clamping connection is realized through the matching mode of the clamping groove 21 and the protrusions, and the clamping device has the advantages of simple structure and easiness in manufacturing.
Further, in some embodiments, the locking slots 21 are provided in multiple sets, and the multiple sets of locking slots 21 are spaced apart along the axial direction of the ball-and-socket joint support 20. The plurality of groups of clamping grooves 21 are arranged, so that the fixing seat 70 has better supporting force.
Further, in some embodiments, there are 4 slots 21 in each set, and each set of 4 slots is uniformly arranged along the circumference of the ball-hinged strut 20.
Further, in some embodiments, the fixing seat 70 includes a first fixing seat 71 and a second fixing seat 72, and the first fixing seat 71 and the second fixing seat 72 are clamped on the ball-and-socket joint strut 20. The fixing base 70 is divided into two parts, which is more convenient when being connected with the ball-hinged strut 20.
Further, in some embodiments, a support table 701 is disposed on the fixing portion, the support table 701 and the fixing base are integrally formed, and the support table 701 is used to connect the lower angle limiting block 60. The supporting base 701 is provided to provide better supporting force for the fixing base 70.
Further, in some embodiments, the connecting member 50 includes a connecting block 51 and a needle bearing 52, one end of the connecting block 51 is fixedly connected to the upper angle limiting block 40, and the other end is connected to the lower angle limiting block 60 through the needle bearing 52.
Further, in some embodiments, two needle bearings 52 are provided.
Further, in some embodiments, as shown in fig. 6, the upper angle limiting block 40 is set to be a cone, two ends of the cone-shaped upper angle limiting block 40 have a larger diameter than one end, and one end has a smaller diameter, the end with the larger diameter of the upper angle limiting block 40 is provided with the first sliding groove 41, and the end with the smaller diameter is provided with the second sliding groove 42. The upper angle limiting block 40 is set to be conical, so that the sliding and positioning of the sliding table 31 of the spherical hinge connecting plate 30 are facilitated.
It should be noted that the lengths of the first sliding chute 41 and the second sliding chute 42 can be determined according to the pitch angle, the roll angle and the yaw angle required in actual use, so the lengths of the first sliding chute 41 and the second sliding chute 42 are not limited in the present invention.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a three degree of freedom model flight test angle stop device, includes spherical hinge (10) and spherical hinge branch (20), spherical hinge (10) and spherical hinge branch (20) are connected its characterized in that: the device also comprises a spherical hinge connecting plate (30), an upper angle limiting block (40), a connecting piece (50) and a lower angle limiting block (60);
the spherical hinge (10) is fixedly connected with a spherical hinge connecting plate (30);
four sliding tables (31) are uniformly arranged on the spherical hinge connecting plate (30);
a first sliding groove (41) matched with the sliding table (31) is formed in the upper angle limiting block (40) along the axial direction of the upper angle limiting block (40), and a second sliding groove (42) is formed in the upper angle limiting block (40) along the circumferential direction of the upper angle limiting block (40); the first sliding groove (41) and the second sliding groove (42) are respectively positioned at two ends of the upper angle limiting block (40);
the upper angle limiting block (40) is fixedly connected with the connecting piece (50), and the connecting piece (50) is rotatably connected with the lower angle limiting block (60);
a positioning block (61) matched with the second sliding groove (42) is arranged on the lower angle limiting block (60); the lower angle limiting block (60) is connected with the spherical hinge support rod (20);
the spherical hinge connecting plate (30) can slide in the upper angle limiting block (40), so that the airplane model connected to the spherical hinge (10) has pitching and rolling motions;
the upper angle limiting block (40) rotates relative to the lower angle limiting block (60), so that the airplane model connected to the spherical hinge (10) has yaw motion.
2. The three-degree-of-freedom model flight test angle limiting device of claim 1, wherein: still include fixing base (70), fixing base (70) are connected in ball pivot branch (20), angle stopper (60) are connected in fixing base (70).
3. The three-degree-of-freedom model flight test angle limiting device of claim 2, wherein: the fixing seat (70) and the spherical hinge support rod (20) are connected in a clamping mode.
4. The three-degree-of-freedom model flight test angle limiting device of claim 3, wherein: a clamping groove (21) is formed in the spherical hinge supporting rod (20), and a protrusion matched with the clamping groove (21) is formed in the fixing seat (70).
5. The three-degree-of-freedom model flight test angle limiting device of claim 4, wherein: the clamping grooves (21) are arranged in multiple groups, and the clamping grooves (21) are arranged at intervals along the axial direction of the spherical hinge supporting rod (20).
6. The three-degree-of-freedom model flight test angle limiting device of claim 3 or 4, wherein: the fixing seat (70) comprises a first fixing seat (71) and a second fixing seat (72), and the first fixing seat (71) and the second fixing seat (72) are connected to the spherical hinge support rod (20) in a clamped mode.
7. The three-degree-of-freedom model flight test angle limiting device of claim 1, wherein: the connecting piece (50) comprises a connecting block (51) and a needle bearing (52), one end of the connecting block (51) is fixedly connected with the upper angle limiting block (40), and the other end of the connecting block (51) is connected with the lower angle limiting block (60) through the needle bearing (52).
8. The three-degree-of-freedom model flight test angle limiting device of claim 7, wherein: the needle roller bearings (52) are provided in two.
9. The three-degree-of-freedom model flight test angle limiting device as recited in claim 1, wherein: the upper angle limiting block (40) is conical, a first sliding groove (41) is formed in the end, with the large diameter, of the upper angle limiting block (40), and a second sliding groove (42) is formed in the end, with the small diameter, of the upper angle limiting block.
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| CN202210411923.0A CN114486168B (en) | 2022-04-19 | 2022-04-19 | Three-degree-of-freedom model flight test angle limiting device |
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| CN202210411923.0A CN114486168B (en) | 2022-04-19 | 2022-04-19 | Three-degree-of-freedom model flight test angle limiting device |
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| CN114486168B true CN114486168B (en) | 2022-06-17 |
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| CN115127773B (en) * | 2022-08-31 | 2022-11-15 | 中国航空工业集团公司沈阳空气动力研究所 | Aerodynamic force load measuring device capable of rapidly replacing test state |
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