CN212030818U

CN212030818U - Demonstration device for measuring rotational inertia of object by torsional pendulum method

Info

Publication number: CN212030818U
Application number: CN202020211575.9U
Authority: CN
Inventors: 许琰; 杨爽
Original assignee: Shenyang Urban Construction University
Current assignee: Shenyang Urban Construction University
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-11-27
Anticipated expiration: 2030-02-17

Abstract

The utility model discloses a torsional pendulum method measuring object moment of inertia demonstration device, which comprises a triangular base, a jack is integrally formed in the middle of the triangular base, positioning sleeves are welded on the triangle of the triangular base, a column is inserted in the upper part of the jack, a rotating rod is inserted in the U-shaped rotating detector, an infrared sensor is embedded in the right part of the upper side wall of the U-shaped rotating detector, a spiral spring positioned in the U-shaped rotating detector is fixedly installed outside the rotating rod, when a knob on the side surface advances towards the inner thread, the screw is pushed by air in a piston cylinder compressed by a piston sheet to extrude outwards, the gap between the nut and the side wall of the positioning sleeve is more effectively filled, a fine adjustment means of equipment is provided, thereby further improving the stability of the equipment during operation, the device greatly improves the means of adjusting the levelness of an experimental facility for torsional pendulum method rotating inertia test, the method provides a convenient and feasible method for adjusting the levelness of the experimental facility for the torsional pendulum method rotational inertia test.

Description

Demonstration device for measuring rotational inertia of object by torsional pendulum method

Technical Field

The utility model relates to a physical experiment technical field specifically is an object inertia presentation device is surveyed to torsional pendulum method.

Background

The role of the moment of inertia in rotational dynamics is equivalent to the mass in linear dynamics, which can be formally understood as the inertia of an object to rotational motion, and is used to establish the relationship between several quantities such as angular momentum, angular velocity, moment and angular acceleration; the conventional method for detecting the rotational inertia can use a rotational inertia tester for detection, but in an experimental class, a detection method for divergently thinking and demonstrating the rotational inertia is required, the rotational inertia tester is used as an electronic instrument and cannot intuitively express the relationship between each variable and the rotational inertia, however, in a common experimental facility for testing the rotational inertia by a torsion pendulum method, the experimental environment needs to be in a horizontal state, the conventional experimental facility for testing the rotational inertia by the torsion pendulum method is fixed on a test bed, and when the test bed or a stair slightly deviates, the horizontal relationship of the test bed or the stair needs to be adjusted, the device needs to be disassembled and then installed, so that the operation is troublesome and the leveling process is complicated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an object inertia presentation device is surveyed to torsional pendulum method to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a torsional pendulum method is surveyed object inertia presentation device, includes the triangle base, the middle part integrated into one piece of triangle base has the jack, and the triangle of triangle base all welds there is the position sleeve, it has the stand to peg graft on the upper portion of jack, the upper portion of stand is rotated and is installed U-shaped rotation detector, the inside of U-shaped rotation detector is pegged graft and is had the bull stick, and the U-shaped right part embedding that rotates the detector upper wall has infrared inductor, the outside fixed mounting of bull stick has the helical spring who is located U-shaped rotation detector inside, and the upper end fixed mounting of bull stick has a pole anchor clamps, the outer end riveting of helical spring spiral sheetmetal is in the lateral wall of U-shaped rotation detector, the thin pole is held to the interior clamp of pole anchor clamps, infrared inductor passes through the power cord and is connected.

Preferably, the positioning sleeve comprises a metal sleeve, the metal sleeve is welded at a triangle of the triangle base, an arc air cavity is formed in the metal sleeve, a piston cylinder is formed in the outer side wall of the metal sleeve, a guide pipe is uniformly embedded in the metal sleeve, a piston sheet is slidably mounted in the piston cylinder, a knob is screwed on the outer side of the piston cylinder, the piston sheet is rotatably mounted at the inner end of the knob, an arc pressing block is slidably mounted in the arc air cavity, and the arc air cavity and the piston cylinder are communicated with each other through the guide pipe.

Preferably, the outer side walls of the triangular bases are fixedly provided with gradienters.

Preferably, the positioning sleeve is internally inserted with screws, the outer parts of the screws are screwed with nuts respectively positioned at the upper side and the lower side of the triangular base, and the surfaces of the nuts are tightly attached to the outer surface of the arc-shaped pressing block.

Preferably, a balancing weight is slidably mounted on the outer portion of the thin rod.

Preferably, the thin rods are equal in length on the left and right sides of the rod clamp.

Compared with the prior art, the beneficial effects of the utility model are that: a torsion pendulum method surveys object moment of inertia presentation device, this torsion pendulum method moment of inertia test's experimental facilities all assemble the spirit level at every lateral wall of its triangular base, the teacher of experiment can monitor the level state of the apparatus at any time through observing the spirit level state, the triangular base is fixed on test bench through the screw, the swivel nut relies on the metal toughness of the screw rod to finely tune the height of each fulcrum of the triangular base, and observe the adjustment result according to three spirit levels, when great deflection takes place, can carry on the great amplitude adjustment through the way of dismantling the screw and increasing the shim; the arc-shaped pressing block structure is additionally arranged on the upper surface of the positioning sleeve of the triangular base, when a knob on the side surface enters inwards, the knob is pushed by a piston sheet to compress air in a piston cylinder and is extruded outwards, gaps between a nut and the side wall of the positioning sleeve are filled more effectively, and a means for fine adjustment of equipment is provided, so that the stability of the equipment during working is further improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is the schematic view of the triangular base structure of the present invention

FIG. 3 is a schematic view of the positioning sleeve structure of the present invention

In the figure: the device comprises a triangular base 1, jacks 2, upright posts 3, a 4U-shaped rotation detector, a rotating rod 5, a spiral spring 6, a positioning sleeve 7, a rod clamp 8, a thin rod 9, a balancing weight 10, an infrared sensor 11, a nut 12, a screw 13, a level gauge 14, a metal sleeve 15, a piston cylinder 16, an arc air cavity 17, an arc pressing block 18, a knob 19, a piston sheet 20 and a guide pipe 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides a torsional pendulum method is surveyed object inertia presentation device, including triangle base 1, the middle part integrated into one piece of triangle base 1 has jack 2, and triangle base 1's triangle all welds positioning sleeve 7, it has stand 3 to peg graft on the upper portion of jack 2, the upper portion of stand 3 is rotated and is installed U-shaped rotation detector 4, it has bull stick 5 to peg graft in U-shaped rotation detector 4's inside, and the U-shaped rotation detector 4 goes up the right part embedding of lateral wall has infrared inductor 11, the outside fixed mounting of bull stick 5 has and is located the inside coil spring 6 of U-shaped rotation detector 4, and the upper end fixed mounting of bull stick 5 has pole anchor clamps 8, the outer end riveting of 6 spiral sheetmetals of coil spring rotates the lateral wall of detector 4 in U-shaped, 8 interior clamps of pole clamp have thin pole 9, infrared inductor 11 is connected with outside counter electricity through the power cord.

Specifically, the positioning sleeve 7 includes metal sleeve 15, metal sleeve 15 welds the triangle department at triangle base 1, and arc air cavity 17 has been seted up to metal sleeve 15's inside, piston cylinder 16 has been seted up to metal sleeve 15's lateral wall, and metal sleeve 15's inside evenly is embedded with pipe 21, piston cylinder 16's inside slidable mounting has piston plate 20, and piston cylinder 16's outside spiro union has knob 19, piston plate 20 rotates and installs in the inner of knob 19, arc briquetting 18 is installed to arc air cavity 17's inside slidable mounting, and communicate each other through pipe 21 between arc air cavity 17 and the piston cylinder 16, arc air cavity 17 and pipe 21 constitute airtight space.

Specifically, the level 14 is fixedly mounted on each outer side wall of the triangular base 1.

Specifically, screws 13 are inserted into the positioning sleeves 7, nuts 12 respectively positioned on the upper side and the lower side of the triangular base 1 are screwed outside the screws 13, and the surfaces of the nuts 12 are tightly attached to the outer surface of the arc-shaped pressing block 18.

Specifically, a weight 10 is slidably mounted to the outside of the thin rod 9.

Specifically, the thin rod 9 is equal in length on both the left and right sides of the rod clamp 8.

The working principle is as follows: when the utility model discloses when using, this experimental facilities that torsional pendulum method rotational inertia test was used has all assembled spirit level 14 at every lateral wall of its triangle base 1, the experiment teacher accessible observes the spirit level state and comes monitoring facilities's horizontal state at any time, triangle base 1 is fixed on the test bench through screw 13, swivel nut 14 relies on screw 13 metal toughness to finely tune the height of each fulcrum of triangle base 1, and observe the adjustment result according to three spirit level 14, when great skew takes place, can adjust by a wide margin through the mode of dismantling screw 13 and increasing the gasket; the arc-shaped pressing block 18 structure additionally arranged on the upper surface of the positioning sleeve 7 of the triangular base 1 is pushed by the piston sheet 20 to compress air in the piston cylinder 16 when the knob 19 on the side surface is screwed inwards, and is extruded outwards, so that the gap between the nut 12 and the side wall of the positioning sleeve 7 is filled more effectively, and a device fine adjustment means is provided, and the stability of the device during working is further improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a torsional pendulum method is surveyed object inertia presentation device, includes triangle base (1), its characterized in that: the middle part of the triangular base (1) is integrally formed with a jack (2), and the triangles of the triangular base (1) are all welded with a positioning sleeve (7), the upper part of the jack (2) is spliced with an upright post (3), the upper part of the upright post (3) is rotatably provided with a U-shaped rotating detector (4), the inside of the U-shaped rotating detector (4) is spliced with a rotating rod (5), an infrared sensor (11) is embedded in the right part of the upper side wall of the U-shaped rotation detector (4), a spiral spring (6) positioned in the U-shaped rotation detector (4) is fixedly arranged outside the rotating rod (5), and the upper end of the rotating rod (5) is fixedly provided with a rod clamp (8), the outer end of the spiral metal sheet of the spiral spring (6) is riveted on the outer side wall of the U-shaped rotation detector (4), thin rods (9) are clamped in the rod clamps (8), and the infrared sensor (11) is electrically connected with an external counter through a power line.

2. The demonstration apparatus for measuring the moment of inertia of an object by the torsional pendulum method as claimed in claim 1, wherein: the positioning sleeve (7) comprises a metal sleeve (15), the metal sleeve (15) is welded at a triangular position of the triangular base (1), an arc-shaped air cavity (17) is formed in the metal sleeve (15), a piston cylinder (16) is formed in the outer side wall of the metal sleeve (15), a guide pipe (21) is uniformly embedded in the metal sleeve (15), a piston sheet (20) is arranged in the piston cylinder (16) in a sliding mode, a knob (19) is screwed on the outer side of the piston cylinder (16), the piston sheet (20) is rotatably installed at the inner end of the knob (19), an arc-shaped pressing block (18) is arranged in the arc-shaped air cavity (17) in a sliding mode, and the arc-shaped air cavity (17) and the piston cylinder (16) are mutually communicated through the guide pipe (21).

3. The demonstration apparatus for measuring the moment of inertia of an object by the torsional pendulum method as claimed in claim 1, wherein: the outer side wall of the triangular base (1) is fixedly provided with a level gauge (14).

4. The demonstration apparatus for measuring the moment of inertia of an object by the torsional pendulum method as claimed in claim 2, wherein: screws (13) are inserted into the positioning sleeves (7), nuts (12) respectively positioned on the upper side and the lower side of the triangular base (1) are screwed outside the screws (13), and the surfaces of the nuts (12) are tightly attached to the outer surface of the arc-shaped pressing block (18).

5. The demonstration apparatus for measuring the moment of inertia of an object by the torsional pendulum method as claimed in claim 1, wherein: and a balancing weight (10) is arranged outside the thin rod (9) in a sliding way.

6. The demonstration apparatus for measuring the moment of inertia of an object by the torsional pendulum method as claimed in claim 1, wherein: the lengths of the thin rods (9) on the left side and the right side of the rod clamp (8) are equal.