CN111811733A - Universal device for measuring axial rotational inertia of eccentric revolving body - Google Patents
Universal device for measuring axial rotational inertia of eccentric revolving body Download PDFInfo
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- CN111811733A CN111811733A CN202010627875.XA CN202010627875A CN111811733A CN 111811733 A CN111811733 A CN 111811733A CN 202010627875 A CN202010627875 A CN 202010627875A CN 111811733 A CN111811733 A CN 111811733A
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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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Abstract
The invention discloses a universal device for measuring axial rotational inertia of an eccentric revolving body, which comprises a lifting rod, a lifting bolt, a support I, an adapter plate, a support II and a stud. The lifting rod is connected with the support I through threads and penetrates through the support II; support I, support II pass through the screw connection on the keysets. The invention relates to a universal device for measuring the axial moment of inertia of an eccentric revolving body, which comprises the steps of firstly measuring the position of a mass center of the eccentric revolving body after the eccentric revolving body is connected with a measuring device, then ensuring that the position of the mass center is on a plane at the middle position of two hanging rings by adjusting the position of a hanging rod, and finally measuring the axial moment of inertia of the eccentric revolving body according to the principle of a torsional pendulum method. The invention can realize one-time clamping and measure the axial mass center and the axial moment of inertia of the eccentric revolving body, can quickly and conveniently adjust the rotating shaft of the eccentric revolving body to the mass center position, and can be suitable for measuring the mass centers and the moment of inertia of the revolving bodies with various diameters and various mass ranges.
Description
Technical Field
The invention relates to the technical field of mechanical structure design, in particular to a device for measuring the rotational inertia of a mass center offset revolving body product and a using method thereof.
Background
The rotational inertia of the rigid body is an important parameter influencing the system operation, and particularly in the fields of weapon systems, engineering machinery, aerospace and automobiles, the measurement and measurement accuracy of the rotational inertia have important influence on the motion, positioning, control and the like of a system of an object to be measured. In the field of aerospace, the guided missile rotational inertia measurement can provide important basis for guided missile research, design and analysis, but in most cases, the guided missile rotational inertia measurement operation is complex, the workload is large, and particularly for some eccentric revolving bodies, the demand on how to realize rapid measurement of the axial rotational inertia of the eccentric revolving bodies is more and more urgent.
In order to solve the problems and meet the requirement of rapidly measuring the axial rotational inertia of the eccentric revolving body, the invention provides a universal device for measuring the axial rotational inertia of the eccentric revolving body and a use method thereof. At present, no explanation or report of the similar technology of the invention is found, and similar data at home and abroad are not collected.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a universal device for measuring the axial moment of inertia of an eccentric revolving body and a using method thereof.
In order to achieve the above object, the present invention provides a universal device for measuring axial moment of inertia of an eccentric rotary body, comprising: the lifting rod 1, the lifting eye screw 2, the screw 3, the support I4, the adapter plate 5, the support II6 and the stud 7; the lifting rod 1 is connected with the support I4 and simultaneously penetrates through the support II 6; the lifting bolt 2 is connected to the lifting rod 1 through threads, and the extension lengths of the lifting rod 1 on two sides of the support I4 and the support II6 can be adjusted within a certain range by rotating the lifting rod (1); the support I4 and the support II6 are connected to the adapter plate 5 through screws 3; one end of the stud 7 is mounted in a threaded hole in the adapter plate 5.
The general device for measuring the axial moment of inertia of the eccentric revolving body is characterized in that the lifting rod 1 is connected with the support I4 through threads.
Above-mentioned measure eccentric solid of revolution axial moment of inertia's universal device, wherein, 1 both ends of lifting rod are distributing two 90 screw through-holes that stagger respectively, when guaranteeing that the adjustment lifting rod 1, the mounted position of eyebolt 2 is up all the time.
The universal device for measuring the axial rotational inertia of the eccentric revolving body is characterized in that a shaft at the connecting part of the lifting rod 1 and the support I4 is provided with threads, and a shaft at the connecting part of the lifting rod 1 and the support II6 is a polished rod; threaded holes are formed in the support I4, and through holes are formed in the support II 6.
The above general device for measuring the axial moment of inertia of an eccentric rotator is characterized in that the screw 3 comprises a spring washer and a flat pad.
The universal device for measuring the axial moment of inertia of the eccentric revolving body is characterized in that threaded holes are uniformly distributed in positions with different diameters on the adapter plate 5, and corresponding holes can be selected according to the diameters of products.
The using method of the universal device for measuring the axial moment of inertia of the eccentric revolving body comprises the following steps;
firstly, measuring the mass of a revolving body product and the mass of the measuring device, and adjusting the position of a lifting rod to enable the lifting rod to be in a symmetrical position;
secondly, mounting the revolving body product on an adapter plate;
thirdly, vertically hoisting the revolving body through a hoisting ring screw to obtain tension on two sides;
fourthly, obtaining the position of the mass center according to stress analysis, and then adjusting the lifting rod to enable the position of the mass center to be on the plane of the middle position of the two lifting rings;
fifthly, twisting the revolving body by a certain angle, loosening the hand, recording the swing period, repeating for several times, and calculating an average value;
and sixthly, calculating the axial inertia moment of the revolving body according to the principle of the torsional pendulum method.
In the third step, the revolving body is vertically hoisted by using two tension meters or other measuring equipment through the hoisting ring screws, so that the tension on two sides is obtained.
Compared with the prior art, the invention has the technical beneficial effects that:
1. the invention can realize one-time clamping and measure the axial mass center and the axial moment of inertia of the eccentric revolving body.
2. The invention can quickly and conveniently adjust the rotating shaft of the eccentric revolving body to the position of the mass center.
3. The invention can be suitable for measuring the mass center and the rotational inertia of the revolving body with various diameters and various mass ranges.
Drawings
The invention provides a general device for measuring the axial moment of inertia of an eccentric revolving body, which is provided by the following embodiments and attached drawings.
FIG. 1 is a schematic structural diagram of a general device for measuring axial moment of inertia of an eccentric rotary body according to the present invention;
in the figure: 1-lifting rod, 2-lifting ring screw, 3-screw, 4-support I, 5-adapter plate, 6-support II and 7-stud.
Detailed Description
A general apparatus for measuring the axial moment of inertia of an eccentric rotor according to the present invention will be described in further detail with reference to fig. 1.
The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. 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.
The invention provides a universal device for measuring axial rotational inertia of an eccentric revolving body, which comprises a lifting rod 1, a lifting eye screw 2, a screw 3, a support I4, an adapter plate 5, a support II6 and a stud 7;
preferably, the lifting rod 1 is connected with the support I4 through threads and penetrates through the support II 6; the lifting bolt 2 is connected to the lifting rod 1 through threads, and the lifting rod 1 can be rotated to properly adjust the extension lengths of the lifting rod 1 on two sides of the support I4 and the support II 6;
two threaded through holes staggered by 90 degrees are respectively distributed at two ends of the lifting rod 1, so that the mounting position of a lifting ring screw is always upward within a measurement error range when the lifting rod is adjusted; the shaft of the connecting part of the lifting rod 1 and the support I4 is provided with threads, the shaft of the connecting part of the lifting rod and the support II6 is a polished rod, correspondingly, the support I4 is a threaded hole, and the support II6 is a through hole.
Preferably, the support I4 is connected to an adapter plate 5 through a screw 3; the support II6 is connected to the adapter plate 5 through a screw 3.
Preferably, the screw 3 comprises a spring washer and a flat washer;
preferably, one end of the stud 7 is installed in a threaded hole on the adapter plate 5;
the adapter plate 5 is provided with threaded holes which are uniformly distributed at positions with different diameters, and corresponding holes can be selected according to the diameters of products.
The invention provides a universal device for measuring the axial moment of inertia of an eccentric revolving body and a using method thereof, which are characterized by comprising the following steps of;
firstly, measuring the mass of a revolving body product and the mass of the measuring device, and adjusting the position of a lifting rod to enable the lifting rod to be in a symmetrical position;
secondly, mounting the revolving body product on an adapter plate;
thirdly, vertically hoisting the revolving body by using two tension meters through a hoisting ring screw to obtain tension on two sides;
fourthly, obtaining the position of the mass center according to stress analysis, and then adjusting the lifting rod to enable the position of the mass center to be on the plane of the middle position of the two lifting rings;
fifthly, twisting the revolving body by a certain angle, loosening the hand, recording the swing period, repeating for several times, and calculating an average value;
and sixthly, calculating the axial inertia moment of the revolving body according to the principle of the torsional pendulum method.
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 (8)
1. A universal device for measuring the axial moment of inertia of an eccentric body of revolution, comprising: the lifting rod (1), the lifting eye screw (2), the screw (3), a support I (4), an adapter plate (5), a support II (6) and a stud (7); the lifting rod (1) is connected with the support I (4) and simultaneously penetrates through the support II (6); the lifting bolt (2) is connected to the lifting rod (1) through threads, and the lifting rod (1) can be rotated to adjust the extending lengths of the lifting rod (1) on the two sides of the support I (4) and the support II (6); the support I (4) and the support II (6) are connected to the adapter plate (5) through screws (3); one end of the stud (7) is arranged in a threaded hole on the adapter plate (5).
2. The universal device for measuring the axial moment of inertia of an eccentric body of revolution as claimed in claim 1, wherein the lifting rod (1) is connected to the support I (4) by a screw thread.
3. The universal device for measuring the axial moment of inertia of an eccentric revolving body according to claim 1, wherein two threaded through holes staggered by 90 degrees are respectively distributed at two ends of the lifting rod (1), so that the mounting position of the lifting bolt (2) is always upward when the lifting rod (1) is adjusted.
4. The universal device for measuring the axial moment of inertia of an eccentric rotator of claim 1, wherein the shaft of the connecting part of the lifting rod (1) and the support I (4) is threaded, and the shaft of the connecting part of the lifting rod and the support II (6) is a polished rod; a threaded hole is formed in the support I (4), and a through hole is formed in the support II (6).
5. The universal device for measuring the axial moment of inertia of an eccentric body of revolution as claimed in claim 1, wherein said screws (3) comprise spring washers and flat pads.
6. The universal device for measuring the axial moment of inertia of an eccentric body of revolution as claimed in claim 1, characterized in that the adapter plate (5) has threaded holes uniformly distributed at different diameter positions, enabling the selection of the corresponding holes according to the product diameter.
7. Use of the universal device for measuring the axial moment of inertia of an eccentric body of revolution according to claims 1 to 6, characterized by comprising the steps of;
firstly, measuring the mass of a revolving body product and the mass of the measuring device, and adjusting the position of a lifting rod to enable the lifting rod to be in a symmetrical position;
secondly, mounting the revolving body product on an adapter plate;
thirdly, vertically hoisting the revolving body through a hoisting ring screw to obtain tension on two sides;
fourthly, obtaining the position of the mass center according to stress analysis, and then adjusting the lifting rod to enable the position of the mass center to be on the plane of the middle position of the two lifting rings;
fifthly, twisting the revolving body by a certain angle, loosening the hand, recording the swing period, repeating for several times, and calculating an average value;
and sixthly, calculating the axial inertia moment of the revolving body according to the principle of the torsional pendulum method.
8. The method for using the universal device for measuring the axial moment of inertia of an eccentric rotating body according to claim 7, wherein in the third step, the rotating body is vertically hoisted by the hoisting screws by using two tension meters to obtain the tension on both sides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010627875.XA CN111811733B (en) | 2020-07-01 | 2020-07-01 | Universal device for measuring axial moment of inertia of eccentric revolving body |
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| CN202010627875.XA CN111811733B (en) | 2020-07-01 | 2020-07-01 | Universal device for measuring axial moment of inertia of eccentric revolving body |
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