CN112129511A - Gas-solid coupling law testing arrangement of closed chamber internal rotation disc - Google Patents
Gas-solid coupling law testing arrangement of closed chamber internal rotation disc Download PDFInfo
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- CN112129511A CN112129511A CN202011090586.7A CN202011090586A CN112129511A CN 112129511 A CN112129511 A CN 112129511A CN 202011090586 A CN202011090586 A CN 202011090586A CN 112129511 A CN112129511 A CN 112129511A
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- 238000012360 testing method Methods 0.000 title claims abstract description 16
- 230000008878 coupling Effects 0.000 title claims abstract description 15
- 238000010168 coupling process Methods 0.000 title claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 15
- 239000007787 solid Substances 0.000 title claims abstract description 12
- 239000011521 glass Substances 0.000 claims abstract description 47
- 238000006073 displacement reaction Methods 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000003292 glue Substances 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 abstract description 10
- 239000000565 sealant Substances 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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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
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a gas-solid coupling rule testing device of a rotating disc in a closed cavity, which belongs to the field of rotating disc testing and mainly comprises an organic glass bottom plate, an organic glass upper cover, a displacement sensor, a tachometer, a pressure sensor, a sound sensor, a thin disc, a motor base and an electromagnet. The motor and the organic glass bottom plate are fixed on the motor base, and a sealing ring and a sealant are added between the organic glass upper cover and the bottom plate to construct a closed cavity and are fastened by bolts and nuts; the height of the disc is changed by adjusting the number of the aluminum gaskets, the rotating speed of the motor is controlled by a software program, and vibration displacement, pressure and noise signals of the rotating disc in the closed cavity under the conditions of different heights and rotating speeds can be obtained by the displacement, pressure and sound sensors, so that the gas-solid coupling rule test of the rotating disc is carried out. In addition, the invention has the advantages of simple structure, convenient operation, easy control, lower cost and the like.
Description
Technical Field
The invention belongs to the field of rotating disc testing, and particularly relates to a device for testing the coupling rule of a rotating disc and fluid in a closed cavity.
Background
Rotating disks, a typical mechanical structure, have been widely used in various manufacturing practices. Such as the blade of a circular saw, the disk of a mechanical hard drive, and the optical disk of an optical drive, etc. In these products, the rotating disc serves as a key component without exception, so that the rotating disc plays a crucial role in the service life, the running performance, the working efficiency, etc. of the machine.
In recent years, researchers at home and abroad have more and more researches on rotating discs, which are mainly divided into three aspects: the main cause of rotational instability of the disc; the mechanism of generating vibration noise of the rotating disk; the coupling rule between the rotating disc and the fluid. Through research on the rotating disc, the fluid flow on the surface of the rotating disc is found to be the main cause of instability of the rotation of the disc; the generation mechanism of the vibration noise of the rotating disk is different from that of other mechanical equipment, for example, the noise of a mechanical hard disk is generated by the disturbance of a magnetic head in the read-write process of the magnetic disk; the interaction of the spinning disk with the surface fluid can deform the disk, which can greatly increase the probability of equipment failure due to collision of the spinning disk with other components.
Aiming at the problems, the invention uses a mechanical hard disk as a research background, invents a device for researching the flow characteristic of air in a closed chamber and testing the gas-solid coupling rule of a rotating disk, and has great necessity and practical value for the research of the rotating disk.
Disclosure of Invention
The invention aims to provide a device for testing the gas-solid coupling rule of a rotating disc in a closed cavity, which can measure vibration displacement, pressure intensity and noise signals of the rotating disc at different heights and rotating speeds and transmit experimental data to a computer for processing and analysis through a data acquisition card.
In order to achieve the purpose, the invention adopts the technical scheme that:
a gas-solid coupling law testing device of a rotating disc in a closed cavity mainly comprises an organic glass bottom plate, an organic glass upper cover, a displacement sensor, a tachometer, a pressure sensor, a sound sensor, a thin disc, a motor base and an electromagnet. During assembly, a motor is fixed on a motor base through bolts, an organic glass base plate is fixed on the motor base through bolts, a plurality of aluminum gaskets are arranged on a motor shaft, a thin disc is arranged on the aluminum gaskets, the height of the thin disc is convenient to adjust by changing the number of the aluminum gaskets, then a plurality of aluminum gaskets are arranged on the thin disc, the thin disc is convenient to install, a cover plate is fixed on the motor shaft through bolts, an organic glass upper cover is installed, the thin disc and the organic glass base plate are fixed together through bolts and nuts, a sealing ring and sealing glue are arranged between the upper cover and the base plate in order to strictly ensure that the discs rotate to seal the environment, the edge seams are sealed through the glue, then a sound sensor is installed on the organic glass upper cover, noise signals in a sealed cavity are collected, and then three pressure sensors are installed on the organic glass upper cover at equal intervals, the center, the middle and the external pressure signals of the thin disc in the collection cavity are collected, a displacement sensor is arranged on the organic glass upper cover and can collect vibration displacement signals of the thin disc, a sound sensor is also arranged in the motor base and is placed in the motor base through the side face of the motor base to collect internal noise signals of the motor base, and finally the revolution meter and the electromagnet are respectively fixed at proper positions above the organic glass upper cover and below the bottom plate through the support.
The top of the organic glass upper cover is provided with three round holes which are equidistantly distributed from the center to the edge and used for installing a pressure sensor; the top of the sensor is also provided with two round holes for mounting a sound sensor and a displacement sensor; and finally, the organic glass upper cover is also provided with a circle of sealing groove for placing the sealing ring.
The thin disc is a stainless steel thin plate, one surface of the disc is painted black, and the light reflecting strips are adhered to the outer edge of the disc for more accurately acquiring the actual rotating speed of the disc.
A motor hole is formed in the upper surface of the motor base and used for mounting a motor, and a threaded hole is used for fixing the motor and the organic glass bottom plate; the side surface is provided with a through hole for mounting the sound sensor and a motor lead.
Other components such as computers, signal acquisition cards, regulated dc power supply, relays, wires, brackets, etc. are not shown.
The invention has the advantages that: the structure is simple, and the processing and the manufacturing are convenient; the closed working environment of the rotating disc can be simulated, and the measured data is close to the actual condition; the vibration displacement, pressure and noise signals of the rotating disc at different heights and rotating speeds can be measured, and experimental data are transmitted to a computer for processing and analysis through a data acquisition card.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention
FIG. 2 is a schematic view of the internal structure of the present invention
FIG. 3 is a schematic view of the following structure of a thin circular plate according to the present invention
FIG. 4 is a schematic partial cross-sectional view of a motor and a motor base according to the present invention
FIG. 5 is an experimental flow diagram of the present invention wherein: 1. an organic glass base plate; 2. an organic glass upper cover; 3. a displacement sensor; 4. a tachometer; 5. a pressure sensor; 6. a sound sensor; 7. a thin disc; 8. a motor; 9. a motor base; 10. an electromagnet; 11. a cover sheet; 12. a bolt; 13. an aluminum gasket; 14, reflecting strips; 15, sealing rings; 16. a bolt; 17. a bolt; 18. a bolt; 19. and a nut.
Detailed Description
Referring to fig. 1-4, the invention discloses a gas-solid coupling law testing device for a rotating disc in a closed cavity, which mainly comprises an organic glass bottom plate (1), an organic glass upper cover (2), a displacement sensor (3), a revolution meter (4), a pressure sensor (5), a sound sensor (6), a thin disc (7), a motor (8), a motor base (9) and an electromagnet (10).
Description of installation procedure: 1. placing a motor base (9) on a flat experiment table; 2. the motor (8) is arranged in the motor base (9), the lead penetrates out of a side hole of the motor base (9), and the motor (8) is fastened on the motor base (9) through a bolt (16); 3. placing the organic glass bottom plate (1) on the motor base (9) and fastening the organic glass bottom plate by using bolts (17), and sealing the gaps between the organic glass bottom plate (1) and the motor (8) and between the organic glass bottom plate and the bolts (17) by using sealing glue to prevent the closed environment from being influenced; 4. an aluminum gasket (13) is arranged on the motor shaft according to the height of the thin disc (7); 5. painting one surface of the thin disc (7) black, sticking a light reflecting strip (14) at the outer edge of the disc, and then placing the processed thin disc (7) on an aluminum gasket (13); 6. in order to press the thin disc (7) conveniently, an aluminum gasket (13) and a cover plate (11) are sequentially placed on the thin disc (7), and the cover plate (11) is fastened on a motor shaft by a bolt (12); 7. installing an organic glass upper cover (2), placing a sealing ring (15) in a sealing groove of the organic glass upper cover (2), coating a sealant on a bonding surface of an upper plate and a lower plate, fastening the upper cover and a bottom plate by using a bolt (18) and a nut (19), and sealing a side seam by using the glue to ensure a closed environment; 8. a displacement sensor (3), three pressure sensors (5) and a sound sensor (6) are arranged on a hole of an organic glass upper cover (2), and the mounting hole is sealed by sealant to ensure a closed environment; 9. a built-in sound sensor (6) is arranged in a side hole of the motor base (9); 10. the support is adjusted, so that the revolution meter (4) is arranged on the organic glass upper cover (2) and is opposite to the reflective strips (14) on the thin disc (7) or the circumference where the reflective strips are located, and the revolution of the thin disc (7) can be conveniently measured; 11. the support is adjusted, so that the electromagnet (10) is positioned below the organic glass bottom plate (1) and faces the edge of the thin disc (7) and the displacement sensor (3), and excitation of the thin disc (7) and collection of vibration displacement signals of the thin disc (7) by the displacement sensor (3) are facilitated.
Description of the circuit: in the aspect of a circuit, a motor (8) is connected with a motor driver and is respectively supplied with power by 12V and 5V direct current power supplies, and a data acquisition card controls the driver to adjust the rotating speed of the motor (8); the electromagnet (10) is connected with a relay, 5V direct current power supply supplies power, and the relay controls the electromagnet (10) to work and excite the thin disc (7); the displacement sensor (3) and the pressure sensor (5) are respectively connected with the signal adapter and are powered by a 24V direct-current power supply; the sound sensor (6) is directly connected with the acquisition card and is powered by a 12V direct current power supply; the data acquisition card is connected with a power supply of the tachometer (4); and finally, storing signals acquired by the displacement sensor (3), the pressure sensor (5) and the sound sensor (6) into a computer through a data acquisition card.
The preparation process comprises the following steps: before a test experiment for the coupling rule of the closed cavity rotating disc and fluid is carried out, all experimental instrument equipment and circuits need to be checked and adjusted. The main preparation items include: 1. ensuring that the mutual position relation of all experimental equipment is not interfered; 2. the organic glass bottom plate (1), the motor (8) and the motor base (9) are connected safely and reliably, and the motor base (9) is horizontally placed on the experiment table; 3. the organic glass upper cover (2) is firmly connected with the organic glass bottom plate (1) through the bolts (18) and the nuts (19), the gap is sealed well, and no sundries are left in the closed cavity; 4. adjusting the voltage of the direct-current stabilized power supply to a rated voltage value of equipment; 5. ensuring that the circuit connection sequence of each instrument and meter is correct; 6. ensuring that power supplies and circuits connected with the experimental equipment are in good contact without short circuit and open circuit; 7. the height of the electromagnet (10) is adjusted through the bracket, so that the outer edge of the thin disc (7) is obviously deformed in the power-on and power-off process of the electromagnet (10), and the deformation is within the measuring range of the displacement sensor (3); 8. the tachometer (4) is opened, and the position of the tachometer (4) is changed by adjusting the bracket, so that the light beam just vertically irradiates the reflective strip (14) or the circumference where the reflective strip is positioned.
The experiment was started: and starting to carry out experimental measurement after ensuring that the connection sequence of each experimental equipment position and each unit is correct. The method comprises the steps of firstly switching on a power supply, starting a tachometer (4) for standby preparation, starting a computer to call a software program to control the voltage of a motor (8) to boost, in the early stage of an experiment, enabling the motor (8) to drive a thin disc (7) to rotate unstably, not acquiring data at the moment, continuously increasing the voltage of the motor (8), adjusting the tachometer (4) to be in a maximum mode when the rotation of the thin disc (7) tends to be stable, measuring the rotating speed of the thin disc (7), controlling the on-off of an electromagnet (10) to excite the thin disc (7) by the software program, automatically storing the rotating speed, vibration displacement, pressure and noise signals acquired by an acquisition card by the computer, and finally placing a protective iron cover on an experiment table to ensure the safety of experimenters. After a certain set of experimental data is measured, the measurement is finished, the protective iron cover is taken down, the organic glass upper cover (2) is opened, the height of the thin disc (7) on the motor shaft is changed by adjusting the number of the aluminum gaskets (13), a closed environment is constructed again, and the steps are repeated to acquire the experimental data in the closed cavity under the height of the new disc. The device can measure the vibration displacement, the pressure intensity and the noise signals of the rotating disc in the closed cavity at different heights and rotating speeds. The specific flow refers to fig. 5.
Claims (4)
1. The utility model provides a gas-solid coupling law testing arrangement of rotation disc in closed chamber which characterized in that: the device mainly comprises an organic glass bottom plate (1), an organic glass upper cover (2), a displacement sensor (3), a tachometer (4), a pressure sensor (5), a sound sensor (6), a thin disc (7), a motor (8), a motor base (9) and an electromagnet (10); the device comprises an organic glass bottom plate (1), an organic glass upper cover (2), a displacement sensor (3), a pressure sensor (5) and a sound sensor (6), wherein the organic glass bottom plate and the organic glass upper cover are installed together, the displacement sensor, the pressure sensor and the sound sensor are installed in an upper hole of the organic glass upper cover (2), the organic glass bottom plate (1) and a motor (8) are installed on a motor base (9), one surface of a thin disc (7) is painted black, and a light reflecting strip (14) is attached to the surface of the thin; when the device works, the voltage of the motor (8) is controlled to increase through a software program, when the thin disc (7) rotates stably, the tachometer (4) is set to collect data in a maximum mode, the electromagnet (10) is controlled to be switched on and off through the software program, and the displacement sensor (3), the pressure sensor (5) and the sound sensor (6) are controlled through the software program to collect and store vibration displacement, pressure and noise signals.
2. A gas-solid coupling law testing device of a rotating disc in a closed cavity according to claim 1, wherein: the organic glass bottom plate (1) and the organic glass upper cover (2) are installed together to form a closed space, add sealing washer (15) and sealed glue between organic glass bottom plate (1) and organic glass upper cover (2), and by bolt (18), nut (19) fastening, edge gap department is also sealed by sealed glue, install displacement sensor (3) on organic glass upper cover (2), each hole also is sealed by sealed glue behind pressure sensor (5) and sound sensor (6), with this guarantee strict closed environment.
3. A gas-solid coupling law testing device of a rotating disc in a closed cavity according to claim 1, wherein: three equidistant pressure sensors (5) from the center to the edge are arranged in an upper hole of the organic glass upper cover (2), and pressure signals of the center, the middle and the outside of the thin disc (7) in the closed cavity can be collected.
4. A gas-solid coupling law testing device of a rotating disc in a closed cavity according to claim 1, wherein: by changing the rotating speed and the height of the disc, vibration displacement, pressure intensity and noise signals of the rotating disc in the closed cavity at different rotating speeds and heights can be measured through the displacement sensor (3), the pressure intensity sensor (5) and the sound sensor (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011090586.7A CN112129511A (en) | 2020-10-13 | 2020-10-13 | Gas-solid coupling law testing arrangement of closed chamber internal rotation disc |
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| CN202011090586.7A CN112129511A (en) | 2020-10-13 | 2020-10-13 | Gas-solid coupling law testing arrangement of closed chamber internal rotation disc |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532819A (en) * | 2021-06-22 | 2021-10-22 | 北京力达塑料制造有限公司 | Tension and compression testing machine for safety helmet |
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