CN114593868A - Self-adaptive high-precision rotational inertia measuring device - Google Patents
Self-adaptive high-precision rotational inertia measuring device Download PDFInfo
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- CN114593868A CN114593868A CN202210126536.2A CN202210126536A CN114593868A CN 114593868 A CN114593868 A CN 114593868A CN 202210126536 A CN202210126536 A CN 202210126536A CN 114593868 A CN114593868 A CN 114593868A
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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
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/10—Determining the moment of inertia
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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
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/02—Details of balancing machines or devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention provides a self-adaptive high-precision rotational inertia measuring device relating to the field of mechanical design and test, which comprises an installation platform, a base, a small-range torsion spring mechanism, a middle-range torsion spring mechanism, a large-range torsion spring mechanism, a bearing, an angular acceleration sensor, a supporting spring and a rotating shaft, wherein the angular acceleration sensor is connected to the upper part of the installation platform, the lower part of the installation platform is connected to the base, the installation platform and the base are respectively provided with the bearing, the bearing is connected through the rotating shaft, the supporting spring is sleeved on the rotating shaft, the small-range torsion spring mechanism, the middle-range torsion spring mechanism and the large-range torsion spring mechanism are connected to the base, and the small-range torsion spring mechanism, the middle-range torsion spring mechanism and the large-range torsion spring mechanism are correspondingly connected with an outer convex transmission block on the installation platform. The invention realizes the extension and contraction of the mounting platform through the supporting spring, the convex transmission block is in matching contact with the torsion spring mechanism with matching range, and the high-precision measurement of the rotational inertia is realized through self-adaptively selecting the torsion springs with different ranges.
Description
Technical Field
The invention relates to the field of mechanical design and test, in particular to a self-adaptive high-precision rotational inertia measuring device.
Background
The rotational inertia measurement has important application in scientific experiments, engineering technology, aerospace, mechanical industries and the like. With the continuous improvement of the performance of the aircraft, the quality characteristic measurement technology of the aircraft is more and more emphasized. For an aircraft moving at a high speed, the rotational inertia is out of tolerance, more capability is needed to control the flight direction and the attitude, and the aircraft is easy to deviate from the trajectory.
The existing measuring method comprises a compound pendulum method, a falling body method, a three-wire torsion method, a single-wire torsion pendulum method and a mass wire method. The compound pendulum method is not suitable for large objects, the mass center of the object needs to be accurately measured, the falling body method and the single-line torsion pendulum method are suitable for constructing symmetrical distribution, and the three-line torsion method and the mass line method are complex in calculation.
The search of the prior art shows that Chinese patent publication No. CN106338325A discloses a method for measuring the three-directional mass and the rotational inertia of a small satellite, but the test device and the scheme are complex. The Chinese patent publication No. CN102692264A discloses a method for measuring mass, mass center and rotational inertia, but the error of the measuring method is large. CN206945219U discloses a rotational inertia measuring instrument, but it is difficult to satisfy the measurement with high precision and wide range of rotational inertia.
Based on the above usage requirements, it is urgently needed to provide a high-precision rotational inertia test bench and a measurement method suitable for a wide rotational inertia range.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a self-adaptive high-precision rotational inertia measuring device.
The invention provides a self-adaptive high-precision rotational inertia measuring device which comprises an installation platform, a base, a small-range torsion spring mechanism, a medium-range torsion spring mechanism, a large-range torsion spring mechanism, a bearing, an angular acceleration sensor, a supporting spring and a rotating shaft, wherein the angular acceleration sensor is connected to the upper part of the installation platform, the lower part of the installation platform is connected to the base, the installation platform and the base are respectively provided with the bearing, the bearings are connected through the rotating shaft, the supporting spring is sleeved on the rotating shaft, the small-range torsion spring mechanism, the medium-range torsion spring mechanism and the large-range torsion spring mechanism are connected to the base, and the small-range torsion spring mechanism, the medium-range torsion spring mechanism and the large-range torsion spring mechanism are correspondingly connected with a convex transmission block on the installation platform;
the supporting spring is pressed downwards through the weight of the object to be measured on the mounting platform, the convex transmission block is driven to be in contact with the small-range torsion spring mechanism or the medium-range torsion spring mechanism or the large-range torsion spring mechanism, the angle of the mounting platform is adjusted, the angular acceleration of the mounting platform is calculated through the angular acceleration sensor, and the rotational inertia of the object to be measured is obtained.
In some embodiments, the small-range torsion spring mechanism, the medium-range torsion spring mechanism and the large-range torsion spring mechanism are identical in structure and comprise an installation shell, a torsion spring and a rotating shell, the rotating shell is connected to the installation shell to form a sealed cavity, the torsion spring is fixed in the sealed cavity, one end of the torsion spring is connected to the installation shell, and the other end of the torsion spring is connected to the rotating shell.
In some embodiments, the rotating housing is provided with inner wall grooves, and the inner wall grooves are arranged at intervals of 90 degrees.
In some embodiments, the male transmission block is in corresponding contact with the inner wall groove.
In some embodiments, the base is provided with a fixing groove, and the small-range torsion spring mechanism, the medium-range torsion spring mechanism and the large-range torsion spring mechanism are respectively installed in the corresponding fixing grooves.
In some embodiments, the male transmission block comprises an upper male transmission block, a middle male transmission block, and a lower male transmission block, and the upper male transmission block, the middle male transmission block, and the lower male transmission block are disposed on the mounting platform at 90 ° intervals.
In some embodiments, the mounting platform comprises an upper mounting platform and a lower mounting platform, the bottom of the upper mounting platform is connected with the lower mounting platform, and the upper outer convex transmission block, the middle outer convex transmission block and the lower outer convex transmission block are arranged on the lower mounting platform at an interval of 90 degrees.
In some embodiments, the upper mounting platform is disc-shaped, the upper surface of the upper mounting platform is provided with a measuring mounting threaded hole, and the lower surface of the upper mounting platform is connected with the angular acceleration sensor.
In some embodiments, the lower mounting platform is conical, and the bearing is mounted at the bottom opening of the lower mounting platform.
In some embodiments, the male transmission block: fixing the groove: the number ratio of the inner wall grooves is 1: 1: 1.
compared with the prior art, the invention has the following beneficial effects:
the invention realizes the extension and contraction of the mounting platform through the supporting spring, the convex transmission block is in matching contact with the torsion spring mechanism with matched measuring ranges, and the high-precision measurement of the rotary inertia is realized through self-adaptively selecting the torsion springs with different measuring ranges.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic cross-sectional view of an adaptive high-precision rotational inertia measurement apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of the adaptive high-precision rotational inertia measuring apparatus according to the present invention;
FIG. 3 is a schematic structural view of the mounting platform of the present invention;
FIG. 4 is a schematic structural view of the torsion spring mechanism of the present invention;
FIG. 5 is a cross-sectional view of the torsion spring mechanism of the present invention;
FIG. 6 is a schematic view of a base according to the present invention;
FIG. 7 is a cross-sectional view of a base according to the present invention.
Reference numbers in the figures:
the installation platform comprises an installation platform 1, an upper installation platform 11, a lower installation platform 12, a convex transmission block 13, an upper convex transmission block 131, a middle convex transmission block 132, a lower convex transmission block 133, a base 2, a fixed groove 21, a small-range torsion spring mechanism 3, an installation shell 31, a torsion spring 32, a rotating shell 33, an inner wall groove 34, a middle-range torsion spring mechanism 4, a large-range torsion spring mechanism 5, a bearing 6, an angular acceleration sensor 7, a supporting spring 8 and a rotating shaft 9.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Examples
According to the self-adaptive high-precision rotational inertia measuring device provided by the invention, as shown in fig. 1-7, the device comprises a mounting platform 1, a base 2, a small-range torsion spring mechanism 3, a middle-range torsion spring mechanism 4, a large-range torsion spring mechanism 5, a bearing 6, an angular acceleration sensor 7, a supporting spring 8 and a rotating shaft 9;
the mounting platform 1 comprises an upper mounting platform 11 and a lower mounting platform 12, the bottom of the upper mounting platform 11 is connected with the lower mounting platform 12, and the lower mounting platform 12 is connected to the base 2. Go up mounting platform 11 and be discoid, go up mounting platform 11 upper surface and be equipped with the measurement installation screw hole, go up mounting platform 11 lower surface and connect angular acceleration sensor 7. The lower mounting platform 12 is conical, and a bearing 6 is arranged at an opening at the bottom of the lower mounting platform 12. Preferably, the bottom of the lower mounting platform 12 is circular. The upper male transmission block 131, the middle male transmission block 132 and the lower male transmission block 133 are arranged on the lower mounting platform 12 at intervals of 90 °.
The bottom of the base 2 is provided with a circular groove mounting bearing 6, and preferably, the bearing 6 adopts a high-precision low-friction commercial bearing. Two ends of the rotating shaft 9 are respectively connected with the bearing 6 on the lower mounting platform 12 and the bearing 6 on the base 2, and the supporting spring 8 is sleeved on the rotating shaft 9. Three fixing grooves 21 are formed in the base 2, and the small-range torsion spring mechanism 3, the medium-range torsion spring mechanism 4 and the large-range torsion spring mechanism 5 are fixedly mounted on the corresponding fixing grooves 21 through pins respectively. The small-range torsion spring mechanism 3 is correspondingly connected with the upper convex transmission block 131, the middle-range torsion spring mechanism 4 is correspondingly connected with the middle and outer convex transmission block 132, and the large-range torsion spring mechanism 5 is correspondingly connected with the lower convex transmission block 133.
Wherein, the structure of the small-range torsion spring mechanism 3, the medium-range torsion spring mechanism 4 and the large-range torsion spring mechanism 5 is consistent, and the small-range torsion spring mechanism, the medium-range torsion spring mechanism and the large-range torsion spring mechanism are connected to form a sealed cavity on the installation shell 31, the torsion spring 32 is fixed in the sealed cavity, one end of the torsion spring 32 is connected with the installation shell 31, and the other end of the torsion spring 32 is connected with the rotation shell 33. The rotating housing 33 is provided with inner wall grooves 34, and preferably, the inner wall grooves 34 are arranged at intervals of 90 °. The male transmission block 13 is in corresponding contact with the inner wall groove 34.
The working principle is as follows:during operation, a measuring object is installed on the upper surface of the upper installation platform 11, the installation platform 1 of the rotational inertia measuring platform descends to a corresponding position under the action of the supporting spring 8 according to the mass of the measuring object, and one of the upper convex transmission block 131, the middle convex transmission block 132 and the lower convex transmission block 131 on the lower installation platform 12 is clamped into the small-range torsion spring mechanism 3 or the medium-range torsion spring mechanism 4 or the large-range torsion spring mechanism 5 with a matching range. The mounting platform 1 is shifted to a certain angle, the angular acceleration of the mounting platform 1 is measured through the angular acceleration sensor 7, and the rotational inertia of the measured object can be obtained through calculation.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The self-adaptive high-precision rotational inertia measuring device is characterized by comprising an installation platform (1), a base (2), a small-range torsion spring mechanism (3), a medium-range torsion spring mechanism (4), a large-range torsion spring mechanism (5), a bearing (6), an angular acceleration sensor (7), a supporting spring (8) and a rotating shaft (9), wherein the angular acceleration sensor (7) is connected to the upper part of the installation platform (1), the lower part of the installation platform (1) is connected to the base (2), the bearings (6) are respectively arranged on the installation platform (1) and the base (2), the bearing (6) is connected through the rotating shaft (9), the supporting spring (8) is sleeved on the rotating shaft (9), the small-range torsion spring mechanism (3), the medium-range torsion spring mechanism (4) and the large-range torsion spring mechanism (5) are connected to the base (2), the small-range torsion spring mechanism (3), the medium-range torsion spring mechanism (4) and the large-range torsion spring mechanism (5) are correspondingly connected with a convex transmission block (13) on the mounting platform (1);
the supporting spring (8) is pressed down through the weight of an object to be detected on the mounting platform (1), the convex transmission block (13) is driven to be in contact with the small-range torsion spring mechanism (3) or the medium-range torsion spring mechanism (4) or the large-range torsion spring mechanism (5), the angle of the mounting platform (1) is adjusted, and the angular acceleration of the mounting platform (1) is calculated through the angular acceleration sensor (7), so that the rotational inertia of the object to be detected is obtained.
2. The adaptive high-precision rotational inertia measuring device according to claim 1, wherein the small-range torsion spring mechanism (3), the medium-range torsion spring mechanism (4) and the large-range torsion spring mechanism (5) are consistent in structure and comprise an installation shell (31), a torsion spring (32) and a rotation shell (33), the rotation shell (33) is connected to the installation shell (31) to form a sealed cavity, the torsion spring (32) is fixed in the sealed cavity, one end of the torsion spring (32) is connected to the installation shell (31), and the other end of the torsion spring (32) is connected to the rotation shell (33).
3. An adaptive high-precision rotational inertia measuring apparatus according to claim 2, wherein the rotary housing (33) is provided with inner wall grooves (34), and the inner wall grooves (34) are arranged at intervals of 90 °.
4. An adaptive high-precision rotational inertia measuring device according to claim 3, wherein the outer convex transmission block (13) is in corresponding contact with the inner wall groove (34).
5. The adaptive high-precision rotational inertia measuring device according to claim 4, wherein a fixing groove (21) is formed in the base (2), and the small-range torsion spring mechanism (3), the medium-range torsion spring mechanism (4) and the large-range torsion spring mechanism (5) are respectively installed in the corresponding fixing groove (21).
6. The adaptive high-precision rotational inertia measuring device according to claim 1, wherein the outer convex transmission block (13) comprises an upper outer convex transmission block (131), a middle outer convex transmission block (132) and a lower outer convex transmission block (133), and the upper outer convex transmission block (131), the middle outer convex transmission block (132) and the lower outer convex transmission block (133) are arranged on the mounting platform (1) at intervals of 90 °.
7. The adaptive high-precision rotational inertia measuring device according to claim 6, wherein the mounting platform (1) comprises an upper mounting platform (11) and a lower mounting platform (12), the bottom of the upper mounting platform (11) is connected with the lower mounting platform (12), and the upper outer convex transmission block (131), the middle outer convex transmission block (132) and the lower outer convex transmission block (133) are arranged on the lower mounting platform (12) at intervals of 90 °.
8. The adaptive high-precision rotational inertia measuring device according to claim 7, wherein the upper mounting platform (11) is in a shape of a circular disc, a measuring mounting threaded hole is formed in an upper surface of the upper mounting platform (11), and the angular acceleration sensor (7) is connected to a lower surface of the upper mounting platform (11).
9. An adaptive high-precision rotational inertia measuring device according to claim 7, wherein the lower mounting platform (12) is conical, and the bearing (6) is mounted at the bottom of the lower mounting platform (12).
10. An adaptive high-precision rotational inertia measuring device according to claim 5, wherein the male transmission block (13): the fixing groove (21): the number ratio of the inner wall grooves (34) is 1: 1: 1.
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| CN202210126536.2A CN114593868B (en) | 2022-02-10 | 2022-02-10 | Self-adaptive high-precision moment of inertia measuring device |
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| CN202210126536.2A CN114593868B (en) | 2022-02-10 | 2022-02-10 | Self-adaptive high-precision moment of inertia measuring device |
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| CN114593868B CN114593868B (en) | 2023-09-19 |
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