CN215831947U - Airflow-driven rotary whistle type sound source device - Google Patents
Airflow-driven rotary whistle type sound source device Download PDFInfo
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- CN215831947U CN215831947U CN202121648592.XU CN202121648592U CN215831947U CN 215831947 U CN215831947 U CN 215831947U CN 202121648592 U CN202121648592 U CN 202121648592U CN 215831947 U CN215831947 U CN 215831947U
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Abstract
The utility model relates to an airflow-driven rotary flute type sound source device, which belongs to the technical field of pneumatic sound sources and comprises a horn, an air duct, an air inlet, a fixed disc, an airflow cutting disc, rotary blades, a support frame and a linkage shaft, wherein one end of the air duct is connected with the air inlet, the horn is arranged at the other end of the air duct, the airflow cutting disc and the fixed disc are arranged between the air duct and the horn, nozzles are respectively arranged on the airflow cutting disc and the fixed disc, the support frame is arranged in the air duct, one end of the linkage shaft is rotatably connected with the support frame, the other end of the linkage shaft is fixedly connected with the airflow cutting disc, the rotary blades are arranged in the middle of the linkage shaft, a bypass is connected in parallel with the air duct, and a regulating valve is arranged on the bypass. The sound frequency is adjusted through opening and closing of the adjusting valve, the operation is easy, mechanical faults are reduced, the service life is prolonged, a variable frequency motor is not needed, and the installation and use cost is reduced.
Description
Technical Field
The utility model relates to a rotary whistle type sound source device driven by airflow, and belongs to the technical field of pneumatic sound sources.
Background
The rotary whistle is a high-strength sound source, needs the energy diverse who sends in the application scene of difference, and has good controllability, stability and practicality, and the rotary whistle is widely used as the sound source device of sound wave ash remover in boiler dusting, and the rotary whistle includes gas holder, modulating device and loudspeaker triplex. The sounding mechanism is that a modulation turntable of the modulation device rotates under the drive of an external drive device, so that the sectional area of high-pressure air passing through a nozzle changes along with time, the pressure of the high-pressure air at the throat of the horn, the air flow and the air flow power all change along with time to form strong sound, and sound energy is amplified and transmitted through an external horn. The rotary whistle type generator has simple structure, high durability, low power consumption and convenient power source, so that the rotary whistle type generator is suitable for industrial application. However, various problems still exist in the existing flute structure, and the research direction still remains in the aspects of sound frequency, improvement of electric control system and the like.
Currently, there are whistling type sound wave devices, for example, a control system device of a whistling type sound wave soot blower is disclosed in the chinese utility model with application publication No. CN 205939194U. The intelligent control system comprises a programmable controller, a control cabinet, field bus controllers, contactors, motors, frequency converters and flute type sound wave soot blowers, wherein the programmable controller and the frequency converters are installed in the control cabinet, the programmable controller is connected to N field bus controllers through field buses, the output end of each field bus controller is connected with one contactor, the frequency converters are connected with N contactors, each contactor is connected with one motor, and each motor is connected with one set of flute type sound wave soot blowers. This patent is motor drive, and is more complicated than the air current drive, and needs the converter to adjust the frequency for the device is more complicated. Therefore, it is important to develop a whistle type sound source device capable of producing sound with high efficiency.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides the airflow-driven rotary whistle type sound source device, the rotary whistle type sound source device adjusts the sound production frequency by opening and closing of the adjusting valve, the operation is easy, mechanical faults are reduced, the service life is prolonged, a variable frequency motor is not needed, and the installation and use cost is reduced.
The technical scheme for solving the technical problems is as follows: a flute type sound source device driven by airflow comprises a bugle, an air duct, an air inlet, a fixed disc, an airflow cutting disc, a rotating blade, a supporting frame and a linkage shaft, the bugle, the fixed disc, the airflow cutting disc, the rotating blade and the supporting frame are arranged on the same axis, one end of the air duct is connected with the air inlet, the horn is arranged at the other end of the air duct, the airflow cutting disc and the fixed disc are arranged between the air duct and the horn, the airflow cutting disc and the fixed disc are both provided with nozzles, the support frame is arranged in the air duct, one end of the coupling shaft is rotatably connected with the support frame, the other end of the coupling shaft is fixedly connected with the airflow cutting disc, the middle part of the linkage shaft is provided with the rotating blades, the air channel is connected with a bypass in parallel, and the bypass is provided with a regulating valve.
The utility model has the beneficial effects that:
(1) when compressed air is introduced into the air inlet, the air can flow into a place with small resistance, and if the regulating valve is completely closed, the air completely flows into the air channel where the rotating blades are located; if the governing valve is opened, the air then can flow into the bypass, and the wind speed in the wind channel can reduce this moment, through the degree of opening and shutting of control governing valve, adjusts rotating vane's slew velocity for the speed of air current cutting air changes, thereby adjusts the sound source frequency. The sounding frequency is adjusted by adjusting the opening of the valve, so that the operation is easy, mechanical faults are reduced, and the service life is prolonged;
(2) compared with the prior art, the rotary flute type sound source device has the advantages that the rotary vanes are driven by compressed air, a variable frequency motor is not needed, and the installation and use cost is reduced.
On the basis of the technical scheme, the utility model can be further improved as follows:
furthermore, the air duct comprises an air inlet air duct and a tapered air duct, wherein one end of the air inlet air duct is provided with the air inlet, and the other end of the air inlet air duct is connected with the tapered air duct; the other end of the tapered air duct is provided with the airflow cutting disc, and the support frame is arranged in the air inlet duct; one end of the bypass is connected with the air inlet duct, and the other end of the bypass is connected with the tapered air duct.
The beneficial effect of adopting the further scheme is that: the tapered air duct is conical, and the air speed at the air flow cutting disc can be effectively enhanced by the tapered air duct.
Further, the diameter ratio of the airflow cutting disc to the air inlet duct is 1: 4, the diameter ratio of the air inlet to the air inlet duct is 1: 2. the diameter of the air inlet is 50mm, the diameter of the air inlet duct is 100mm, the diameters of the airflow cutting disc and the fixed disc are 25mm, and the outer diameter of the linkage shaft is 10 mm.
The beneficial effect of adopting the further scheme is that: the diameter ratio of the airflow cutting disc to the air inlet duct is 1: 4, the diameter ratio of the air inlet to the air inlet duct is 1: 2, the setting of the size ratio can effectively enhance the wind speed at the airflow cutting disc.
Further, the air inlet duct and the tapered duct are sealed, the bypass and the air inlet duct are sealed, and the bypass and the tapered duct are sealed.
The beneficial effect of adopting the further scheme is that: and the sealing treatment is adopted, so that the leakage of compressed air is avoided, the effective utilization of airflow is realized, and the rotating speed of the airflow cutting disc reaches 1200-3000 r/min.
Furthermore, a cylinder is arranged between the horn and the air duct, the fixed disc is fixedly arranged in the cylinder, the airflow cutting disc is rotatably arranged in the cylinder, the outer wall of the airflow cutting disc and the inner wall of the cylinder are lubricated, and rotating grooves which are matched with each other are arranged between the outer wall of the airflow cutting disc and the inner wall of the cylinder.
The beneficial effect of adopting the further scheme is that: the setting of drum more does benefit to the installation of fixed disc and air current cutting dish, rotates the setting of flute and more does benefit to the rotational stability of air current cutting dish, and the friction between air current cutting dish and the drum can effectively be avoided in the lubricated processing of cooperation in addition.
Further, the fixed disc and the airflow cutting disc are uniformly distributed with nozzles with the same aperture, the number of the nozzles on the fixed disc and the airflow cutting disc is the same, and the number of the nozzles is 6-10.
The beneficial effect of adopting the further scheme is that: drive the rotation of air current cutting dish through the interlock axle, the spout on the air current cutting dish realizes the overlap of different degrees with the spout on the fixed disc for the air current changes through the sectional area of spout, causes the air vibration and produces the sound wave, and the reinforcing effect is realized through the bugle to the sound wave rethread.
Furthermore, the linkage shaft is rotatably connected with the middle part of the support frame through a ball bearing, an outer ring of the ball bearing is fixed on the support frame, and an inner ring of the ball bearing rotates along with the linkage shaft.
The beneficial effect of adopting the further scheme is that: the ball bearing is adopted to realize the rotating connection between the linkage shaft and the support frame, the structure is simple, the cost is low, and the use is convenient.
Furthermore, the linkage shaft is provided with 2-4 rotating blades, the air inlet is connected with an air compressor, compressed air with the pressure greater than 0.3MPa is introduced into the air inlet to drive the rotating blades to rotate, the linkage shaft drives the airflow cutting disc to rotate, the sectional area of the airflow passing through the nozzle is changed, air vibration is caused to generate sound waves, and the sound waves are enhanced by the horn.
The beneficial effect of adopting the further scheme is that: the number of the rotating blades is 2-4, the linkage shaft is more suitably driven to rotate, and the preparation is convenient; when the compressed air of the air inlet reaches 0.3MPa, the sound frequency of the rotary whistle type sound source device is 800-1500Hz, and the sound pressure level can reach more than 150dB at a position 1m away from the rotary whistle type sound source device.
Furthermore, the regulating valve is a ball valve, and the opening and closing of the ball valve controls the flow of the compressed air entering the air duct, so that the rotating speed of the rotating blade is regulated.
The beneficial effect of adopting the further scheme is that: the rotating speed of the rotating blades is adjusted by adjusting the opening degree of the ball valve, so that the speed of air flow cutting air is changed, and the frequency of a sound source is adjusted; the ball valve is adopted as the regulating valve, so that the cost is low, and the installation and the use are convenient.
Drawings
Fig. 1 is a schematic perspective view of a whistle type sound source device according to an embodiment;
fig. 2 is a schematic view showing an internal cross-sectional structure of the whistle type sound source device in the embodiment;
FIG. 3 is a schematic view of the internal structure of the air duct in the embodiment;
FIG. 4 is a schematic structural view of the air flow cutting disk in the embodiment;
FIG. 5 is a schematic structural view of the support frame in the embodiment;
FIG. 6 is a graph showing the relationship between the intake pressure and the sound pressure level when the control valve is fully closed in the embodiment;
FIG. 7 is a diagram illustrating the relationship between the intake pressure of the whistling sound source device and the sound source frequency at different opening/closing degrees of the regulating valve when the intake pressure is 0.3 MPa;
in the figure, a horn 1, a fixed disc 2, an airflow cutting disc 3, a rotating blade 4, a support frame 5, an air inlet 6, a bypass 7, an adjusting valve 8, a ball bearing 9, a linkage shaft 10, a tapered air duct 11, an air inlet air duct 12, a nozzle 13 and a cylinder 14 are arranged.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to make the aforementioned objects, features and advantages of the utility model more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in fig. 1-2, an air-driven flute type sound source device comprises a clarion 1, an air duct and an air inlet 6, and is characterized in that the flute type sound source device further comprises a fixed disc 2, an air-flow cutting disc 3, a rotating blade 4, a support frame 5 and a linkage shaft 10, wherein the clarion 1, the fixed disc 2, the air-flow cutting disc 3, the rotating blade 4 and the support frame 5 are on the same axis, one end of the air duct is connected with the air inlet 6, the clarion 1 is installed at the other end of the air duct, the air-flow cutting disc 3 and the fixed disc 2 are installed between the air duct and the clarion 1, nozzles 13 are respectively arranged on the air-flow cutting disc 3 and the fixed disc 2, the support frame 5 is installed in the air duct, one end of the linkage shaft 10 is rotatably connected with the support frame 5, and the other end of the linkage shaft 10 is fixedly connected with the air-flow cutting disc 3, the middle part of the linkage shaft 10 is provided with the rotating blades 4, the air channel is connected with a bypass 7 in parallel, and the bypass 7 is provided with an adjusting valve 8. The regulating valve 8 is a ball valve, and the opening and closing of the ball valve controls the flow of compressed air entering the air duct, so that the rotating speed of the rotating blade 4 is regulated.
The air channel comprises an air inlet air channel 12 and a tapered air channel 11, wherein one end of the air inlet air channel 12 is provided with the air inlet 6, and the other end of the air inlet air channel 12 is connected with the tapered air channel 11; the other end of the tapered air duct 11 is provided with the airflow cutting disc 3, and the support frame 5 is arranged inside the air inlet duct 12; one end of the bypass 7 is connected with the air inlet duct 12, and the other end of the bypass 7 is connected with the tapered duct 11.
The diameter ratio of the airflow cutting disc 3 to the air inlet duct 12 is 1: 4, the diameter ratio of the air inlet 6 to the air inlet duct 12 is 1: 2. the diameter of the air inlet 6 is 50mm, the diameter of the air inlet duct 12 is 100mm, the diameters of the airflow cutting disc 3 and the fixed disc 2 are 25mm, and the outer diameter of the linkage shaft is 10 mm. The tapered air duct 11 is conical, and the tapered air duct 11 can effectively enhance the air speed at the airflow cutting disc 3.
The air inlet duct 12 and the tapered duct 11 are sealed, the bypass 7 and the air inlet duct 12 are sealed, and the bypass 7 and the tapered duct 11 are sealed.
A cylinder 14 is arranged between the horn 1 and the air duct, the fixed disc 2 is fixedly arranged in the cylinder 14, the airflow cutting disc 3 is rotatably arranged in the cylinder 14, mutually matched rotating grooves are arranged between the outer wall of the airflow cutting disc 3 and the inner wall of the cylinder 14, and the outer wall of the airflow cutting disc 3 and the inner wall of the cylinder 14 are lubricated, so that friction between the airflow cutting disc 3 and the cylinder 14 can be effectively avoided.
As shown in fig. 3, the linkage shaft 10 is provided with 2 rotating blades 4, the number of the rotating blades 4 is 2, the air inlet 6 is connected with an air compressor, compressed air larger than 0.3MPa is introduced into the air inlet 6 to drive the rotating blades 4 to rotate, the linkage shaft 10 drives the airflow cutting disc 3 to rotate, the sectional area of the airflow passing through the nozzle 13 changes, air vibration is caused to generate sound waves, and the bugle 1 enhances the sound waves.
As shown in fig. 4, the fixed disk 2 and the airflow cutting disk 3 are uniformly distributed with nozzles 13 having the same aperture, and the number of the nozzles 13 on the fixed disk 2 and the airflow cutting disk 3 is 6.
As shown in fig. 5, the linkage shaft 10 is rotatably connected with the middle of the support frame 5 through a ball bearing 9, an outer ring of the ball bearing 9 is welded in the middle of the support frame 5, and an inner ring of the ball bearing 9 rotates along with the linkage shaft 10.
Fig. 6 shows a graph of the correspondence between the intake pressure and the sound pressure level when the regulating valve 8 of the bypass 7 of the embodiment is completely closed, and the graph of the correspondence between the sound pressure level at 1 meter from the horn 1 and the intake pressure at the intake port 6 is obtained by testing the siren-type sound source device, wherein the air is used as the gas medium, and the sound wave of more than 150dB can be stably emitted within 0.3-0.6MPa of the intake pressure.
As shown in fig. 7, the embodiment corresponds to the sound frequency when the intake pressure is 0.3MPa and the adjusting valve 8 is opened or closed differently, and the abscissa 0 and 100 in fig. 7 correspond to the fully closed and fully opened states of the adjusting valve 8, respectively.
The method for producing sound by adopting the rotary flute type sound source device comprises the following contents: compressed air larger than 0.3MPa is introduced into the air inlet 6 to drive the rotating blades 4 to rotate, the air flow cutting disc 3 is driven to rotate through the linkage shaft 10, the nozzles 13 are arranged on the fixed disc 2, the sectional area of the air flow passing through the nozzles 13 is changed, air vibration is caused to generate sound waves, the horn 1 can effectively enhance the sound, the rotating speed of the air flow cutting disc 4 is 1200 + 3000r/min, the sound production frequency of the rotary whistle type sound source device is 800 + 1500Hz, and the sound pressure level of the position 1m away from the rotary whistle type sound source device can reach more than 150 dB.
The method for adjusting the sound source frequency by adopting the rotary flute type sound source device comprises the following steps: when compressed air is introduced into the air inlet 6, the air flows into a place with low resistance, and if the regulating valve 8 is completely closed, the air completely flows into the tapered air passage 11 where the rotating blades 4 are located; if the regulating valve 8 is opened, the air flow will flow into the bypass 7, and the air speed in the air inlet duct 12 will decrease; by controlling the degree of opening and closing of the regulating valve 8, the rotating speed of the rotary blade 4 is regulated, so that the speed of the air flow cutting air is changed, and the frequency of the sound source is regulated.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The utility model provides an air current driven flute formula sound source device, includes bugle (1), wind channel and air inlet (6), its characterized in that, flute formula sound source device still includes fixed disc (2), air current cutting dish (3), rotating vane (4), support frame (5) and interlock axle (10), bugle (1), fixed disc (2), air current cutting dish (3), rotating vane (4), support frame (5) are on same axis, the one end in wind channel is connected air inlet (6), the other end in wind channel is installed bugle (1), install between wind channel and bugle (1) air current cutting dish (3) and fixed disc (2), all be equipped with spout (13) on air current cutting dish (3) and fixed disc (2), install in the wind channel support frame (5), the one end of interlock axle (10) with support frame (5) rotate and be connected, the other end of the linkage shaft (10) is fixedly connected with the airflow cutting disc (3), the rotating blades (4) are installed in the middle of the linkage shaft (10), a bypass (7) is connected in parallel on the air duct, and an adjusting valve (8) is arranged on the bypass (7).
2. An airflow-driven rotary whistle type sound source device according to claim 1, wherein the air duct includes an intake air duct (12) and a tapered air duct (11), the intake air duct (6) is installed at one end of the intake air duct (12), and the other end of the intake air duct (12) is connected to the tapered air duct (11); the other end of the tapered air duct (11) is provided with the airflow cutting disc (3), and the support frame (5) is arranged in the air inlet duct (12); one end of the bypass (7) is connected with the air inlet duct (12), and the other end of the bypass (7) is connected with the tapered duct (11).
3. An airflow-driven rotary whistle sound source device according to claim 2 wherein the diameter ratio of the airflow cutting disk (3) to the intake air duct (12) is 1: 4, the diameter ratio of the air inlet (6) to the air inlet duct (12) is 1: 2.
4. an airflow-driven whistle type sound source device according to claim 2, wherein a sealing process is performed between said intake air duct (12) and a tapered air duct (11), a sealing process is performed between said bypass (7) and said intake air duct (12), and a sealing process is performed between said bypass (7) and said tapered air duct (11).
5. An airflow-driven rotary flute type sound source device as claimed in claim 1, wherein a cylinder (14) is arranged between the horn (1) and the air duct, the fixed disk (2) is fixedly installed in the cylinder (14), the airflow cutting disk (3) is rotatably installed in the cylinder (14), and the outer wall of the airflow cutting disk (3) and the inner wall of the cylinder (14) are lubricated.
6. An airflow-driven rotary whistle sound source device as claimed in claim 5, wherein the fixed disk (2) and the airflow cutting disk (3) are uniformly distributed with spouts (13) having the same aperture, the number of spouts (13) on the fixed disk (2) and the airflow cutting disk (3) is the same, and the number of spouts (13) is 6-10.
7. An airflow-driven rotary whistle type sound source device according to claim 1, wherein the linkage shaft (10) is rotatably connected with the middle of the support frame (5) through a ball bearing (9), the outer ring of the ball bearing (9) is fixed on the support frame (5), and the inner ring of the ball bearing (9) rotates along with the linkage shaft (10).
8. The airflow-driven rotary flute type sound source device as claimed in claim 1, wherein the linkage shaft (10) is provided with rotating blades (4), the number of the rotating blades (4) is 2-4, the air inlet (6) is connected with an air compressor, and compressed air larger than 0.3MPa is introduced into the air inlet (6) to drive the rotating blades (4) to rotate.
9. An air flow driven whistle type sound source device as claimed in claim 1 wherein said adjusting valve (8) is a ball valve, the opening and closing of which controls the flow of compressed air into the duct to adjust the rotational speed of the rotary blade (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121648592.XU CN215831947U (en) | 2021-07-20 | 2021-07-20 | Airflow-driven rotary whistle type sound source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121648592.XU CN215831947U (en) | 2021-07-20 | 2021-07-20 | Airflow-driven rotary whistle type sound source device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215831947U true CN215831947U (en) | 2022-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121648592.XU Active CN215831947U (en) | 2021-07-20 | 2021-07-20 | Airflow-driven rotary whistle type sound source device |
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| Country | Link |
|---|---|
| CN (1) | CN215831947U (en) |
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2021
- 2021-07-20 CN CN202121648592.XU patent/CN215831947U/en active Active
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