A double-ended radiating motor transducer

Abstract

The invention discloses a double-ended radiation motor transducer, which relates to the field of transducers, including an intermediate support tube arranged in the middle of the transducer, a shell symmetrically installed at both ends of the intermediate support tube, an intermediate rubber sleeve embedded and installed between the inner wall of the shell and the outer wall of the intermediate support tube, and support plates installed on the shells at both ends of the intermediate support tube; a connecting rod and a radiation cover plate reciprocate up and down under the drive of an eccentric shaft; one end of a guide rod is fixed on the radiation cover plate, and the other end of the guide rod is slidably arranged in a linear bearing, and the guide rod and the linear bearing are arranged coaxially to ensure that the radiation cover plate always reciprocates along a straight line to generate sound wave radiation. The invention utilizes the large output force of the motor and the double-ended symmetrical structure, and can realize high-power, low-frequency (0 to 50Hz) sound radiation in a small-sized space, the symmetrical structure has low energy loss, is easy to install and use, and the conformal airbag structure makes the size smaller.

Description

Technical Field

[0001] The present invention relates to the field of transducers, and in particular to a double-ended radiating motor transducer. Background Art

[0002] As a common device, the electric motor is a device that converts electrical energy into mechanical energy for rotor rotation. In combination with other different forms of transmission devices, the rotation of the electronic rotor can be converted into different forms of motion, including linear reciprocating motion. The linear reciprocating motion of the motor has the advantages of low frequency and large displacement. The speed of the general motor is not more than 5000 rpm, which corresponds to no more than 83Hz for the underwater acoustic transducer, and there are fewer types of transducers available in this frequency band. The motor can achieve reciprocating motion at the centimeter, decimeter or even larger level with the corresponding mechanical components, which is difficult for conventional underwater acoustic transducers to achieve. From the above, it can be seen that the reciprocating motion driven by the motor has certain advantages in low-frequency underwater acoustic radiation. While the transducer pushes the water to radiate sound, the water will also give the transducer a reaction force, forcing the transducer to follow the vibration, which causes a large part of the energy loss of the transducer. The double-ended symmetrical structure can avoid this loss and improve the efficiency of the transducer.

[0003] In addition, as the most commonly used electric transducer, it still has the following shortcomings:

[0004] 1. In order to reduce magnetic resistance, the total number of coil turns is small, the wire length is small, and the output force is small during operation;

[0005] 2. In the form of single-ended radiation, when the cover pushes the water, the water exerts a reaction force on the transducer, causing the transducer to vibrate in the opposite direction and lose energy. In addition, this asymmetric form also makes the transducer performance related to the installation and clamping method, increasing the difficulty of use and the instability of performance.

[0006] 3. In the frequency range below the resonance point, a large part of the transducer driving force will be used to push the spring, making the force used to push the water medium in the frequency range below the resonance point smaller, seriously affecting the performance in the low-frequency range. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a double-ended radiating motor transducer having the advantages of simple structure, convenient use, safety and reliability.

[0008] The objective of the present invention is achieved through the following technical solutions: a double-end radiating motor transducer, which adopts a symmetrical structure, including an intermediate support tube arranged in the middle of the transducer, shells are symmetrically installed at both ends of the intermediate support tube, an intermediate rubber sleeve is embedded and installed between the inner wall of the shell and the outer wall of the intermediate support tube, and support plates are installed on the shells at both ends of the intermediate support tube; a dual-axis motor is arranged to pass through the intermediate support tube, and the two motor shafts of the dual-axis motor correspond to pass through the support plates located on both sides of the intermediate support tube, and the two motor shafts are respectively connected to drive a small bevel gear shaft; the small bevel gear shaft is supported on the support plate by a small bevel gear bracket, and the small bevel gear mounted on the small bevel gear shaft is meshed with the large bevel gear for transmission, and the large bevel gear is mounted on the large bevel gear On the wheel axle, the large bevel gear shaft is supported on the support plate by a large bevel gear bracket; a radiation cover is provided at the end of the shell away from the middle support tube, and a radiation cover connecting seat is installed on each side of the bottom of the radiation cover, and a connecting shaft extends from the radiation cover connecting seat, and a driving wheel is installed at each end of the large bevel gear shaft, and an eccentric shaft is provided at the end of the driving wheel away from the large bevel gear shaft, one end of the connecting rod is installed on the connecting shaft, and the other end of the connecting rod is installed on the eccentric shaft. The connecting rod and the radiation cover make reciprocating motion up and down driven by the eccentric shaft; one end of the guide rod is fixed on the radiation cover, and the other end of the guide rod is slidably set in the linear bearing, and the guide rod and the linear bearing are arranged coaxially to ensure that the radiation cover always makes reciprocating motion along a straight line to generate sound wave radiation.

[0009] As a further technical solution, a number of test frame mounting holes are provided on the outer wall of the intermediate support tube for installing the test frame; an inflation nozzle is opened on the outer wall of the intermediate support tube for filling high-pressure gas into the intermediate support tube and the inner cavity of the shell; a watertight connector is provided on the outer wall of the intermediate support tube, and a corresponding signal jack is also provided on the dual-axis motor for electrically connecting to an external servo driver to realize control of the dual-axis motor.

[0010] As a further technical solution, a plurality of protection rods are arranged along the circumference between the intermediate support tube and the shell body for supporting and protecting the intermediate rubber sleeve.

[0011] As a further technical solution, the motor shaft of the dual-shaft motor is connected to the small bevel gear shaft for transmission through an elastic coupling.

[0012] As a further technical solution, the pinion gear is key-connected to the pinion gear shaft, and the pinion gear shaft is supported on the pinion gear bracket through a bearing A.

[0013] As a further technical solution, the large bevel gear is key-connected to the large bevel gear shaft, and the large bevel gear shaft is supported on the large bevel gear bracket through a bearing B.

[0014] As a further technical solution, the driving wheel is connected to the large bevel gear shaft key and is stopped and fixed by a baffle A to prevent circumferential rotation.

[0015] As a further technical solution, one end of the connecting rod is supported on the eccentric shaft through a bearing C and fixed by a baffle B and a stop nut; the other end of the connecting rod is supported on the connecting shaft through a bearing C.

[0016] As a further technical solution, the top of the radiation cover plate and the top of the shell are sealed by a sealing rubber sleeve, the displacement amplitude of the radiation cover plate is ±11 mm, and the frequency of the generated sound waves is 0-40 Hz.

[0017] As a further technical solution, the bottom of the linear bearing is fixed on the upper bracket, and both ends of the upper bracket are fixed on the small bevel gear bracket through side brackets.

[0018] The beneficial effects of the present invention are as follows: by utilizing the large output force of the motor and the double-end symmetrical structure, high-power, low-frequency (0 to 50 Hz) sound radiation can be achieved in a small space. The symmetrical structure has low energy loss and is easy to install and use. The conformal airbag structure makes the size smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 for Figure 1 AA section view.

[0021] Figure 3 for Figure 2 BB cross-sectional view.

[0022] Figure 4 This is the structural front view of the driving wheel.

[0023] Figure 5 It is the structural side view of the driving wheel.

[0024] Figure 6 This is the structural front view of the radiation cover connecting seat.

[0025] Figure 7 This is a structural side view of the radiation cover connection seat.

[0026] Figure 8 This is the sound source level curve of the double-ended radiating motor transducer when the cover radius is 150mm.

[0027] Fig. 9 This is the sound source level curve of the double-ended radiating motor transducer when the cover radius is 325mm.

[0028] Explanation of the reference numerals: signal jack 1, protection rod 3, intermediate support cylinder 4, test frame mounting hole 6, inflation nozzle 7, watertight connector 8, dual-axis motor 9, elastic coupling 10, small bevel gear shaft 11, bearing A12, small bevel gear 13, small bevel gear bracket 14, support plate 15, screw 16, large bevel gear 17, large bevel gear shaft 18, large bevel gear bracket 19, bearing B20, driving wheel 21, baffle A22, eccentric shaft 23, connecting rod 24, bearing C25, baffle B26, stop nut 27, radiation cover connecting seat 28, radiation cover 29, connecting shaft 30, guide rod 31, linear bearing 32, upper bracket 33, side bracket 34, shell 35, intermediate rubber sleeve 36, sealing rubber sleeve 37. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings:

[0030] Example: As shown in the attached Figures 1 to 7 As shown, a double-ended radiating motor transducer adopts a symmetrical structure, including an intermediate support tube 4 arranged in the middle of the transducer, shells 35 are symmetrically installed at both ends of the intermediate support tube 4, an intermediate rubber sleeve 36 is embedded and installed between the inner wall of the shell 35 and the outer wall of the intermediate support tube 4, and support plates 15 are installed on the shells 35 at both ends of the intermediate support tube 4. The double-axis motor 9 is arranged through the middle support tube 4, and the two motor shafts of the double-axis motor 9 correspondingly pass through the support plates 15 located on both sides of the middle support tube 4. The two motor shafts are respectively connected through elastic couplings 10 to drive a small bevel gear shaft 11; the small bevel gear shaft 11 is supported on the support plate 15 by a small bevel gear bracket 14, the small bevel gear 13 is key-connected with the small bevel gear shaft 11, the small bevel gear shaft 11 is supported on the small bevel gear bracket 14 through a bearing A12, the small bevel gear 13 mounted on the small bevel gear shaft 11 is meshed with a large bevel gear 17 for transmission, the large bevel gear 17 is mounted on the large bevel gear shaft 18, the large bevel gear 17 is key-connected with the large bevel gear shaft 18, the large bevel gear shaft 18 is supported on the large bevel gear bracket 19 through a bearing B20, and the large bevel gear bracket 19 is supported on the support plate 15.

[0031] The end of the shell 35 away from the middle support tube 4 is provided with a radiation cover plate 29. A radiation cover plate connecting seat 28 is installed on both sides of the bottom of the radiation cover plate 29. A connecting shaft 30 extends from the radiation cover plate connecting seat 28. A driving wheel 21 is installed on both ends of the large bevel gear shaft 18. The driving wheel 21 is key-connected with the large bevel gear shaft 18 and is stopped and fixed by a baffle A22 to prevent circumferential rotation. An eccentric shaft 23 is provided on the end of the driving wheel 21 away from the large bevel gear shaft 18. One end of the connecting rod 24 is supported on the connecting shaft 30 through a bearing C25, and the other end of the connecting rod 24 is supported on the eccentric shaft 23 through a bearing C25 and fixed by a baffle B26 and a stop nut 27. The connecting rod 24 and the radiation cover plate 29 reciprocate up and down under the drive of the eccentric shaft 23; the top of the radiation cover plate 29 and the top of the shell 35 are sealed by a sealing rubber sleeve 37. The displacement amplitude of the radiation cover plate 29 is ±11mm, and the frequency of the sound wave generated is 0-40Hz. One end of the guide rod 31 is fixed on the radiation cover plate 29, and the other end of the guide rod 31 is slidably set in the linear bearing 32. The guide rod 31 and the linear bearing 32 are coaxially arranged to ensure that the radiation cover plate 29 always reciprocates along a straight line to generate sound wave radiation. The bottom of the linear bearing 32 is fixed on the upper bracket 33, and the two ends of the upper bracket 33 are fixed on the small bevel gear bracket 14 through the side bracket 34.

[0032] Preferably, the outer wall of the intermediate support tube 4 is provided with a plurality of test frame mounting holes 6 for mounting the test frame; the outer wall of the intermediate support tube 4 is provided with an air filling nozzle 7 for filling the intermediate support tube 4 and the inner cavity of the shell 35 with high-pressure gas; the outer wall of the intermediate support tube 4 is provided with a watertight connector 8, and the dual-axis motor 9 is also provided with a corresponding signal jack 1 for electrically connecting an external servo driver to control the dual-axis motor 9. A plurality of protective rods 3 are provided along the circumference between the intermediate support tube 4 and the shell 35 to support and protect the intermediate rubber sleeve 36. The bottom of the sealing rubber sleeve 37 in contact with the shell 35 is fixed by adhesive bonding, and the circular surface of the sealing rubber sleeve 37 in contact with the radiation cover plate 35 is fixed by adhesive bonding, thereby achieving the sealing of the entire device.

[0033] The working process of the present invention is as follows: during operation, the dual-axis motor 9 rotates to drive the small bevel gear 13 to rotate, and the small bevel gear 13 drives the large bevel gear 17 to rotate, and the reduction ratio of the small bevel gear 13 to the large bevel gear 17 is 2:1. The rotation of the large bevel gear 17 drives the large bevel gear shaft 18 to rotate, and then drives the driving wheels 21 at both ends of the large bevel gear shaft 18 to rotate. Since the shaft on the driving wheel 21 is an eccentric shaft 23, the rotation of the driving wheel 21 will drive the connecting rod 24 to perform periodic reciprocating motion. The other end of the connecting rod 24 is connected to the radiation cover plate 29, thereby driving the radiation cover plate 29 to perform periodic motion of up and down displacement, generating sound waves, and the frequency of the sound waves is 0-40Hz. The displacement amplitude of the radiation cover plate 29 is ±11mm. The radiation cover plate 29 performs linear motion under the restriction of the guide mechanism composed of the guide rod 31, the linear bearing 32, the upper bracket 33, and the side bracket 34.

[0034] The shell 35 is screwed to the support plate 15 as a protective shell of the transducer. The middle rubber sleeve 36 is fixed to the shell 34 and the middle support tube 4 by adhesive bonding, forming a seal in the middle of the double-ended radiation motor transducer. The bottom of the sealing rubber sleeve 37 is fixed to the shell 35 by adhesive bonding, and the circular surface of the sealing rubber sleeve 37 is fixed to the radiation cover plate 35 by adhesive bonding, thereby achieving the sealing of the entire device. A number of protection rods 3 are installed between the shell 35 and the middle support tube 4 to protect the sealing rubber sleeve. An inflation nozzle 7 is installed on the middle support tube 4. When in use, air of a certain pressure is injected into the transducer through the nozzle according to the working water depth of the transducer to ensure the stable operation of the transducer underwater.

[0035] The "double-ended radiation motor transducer" proposed in the present invention has a greater electromagnetic driving force, and the double-ended radiation form makes the driving force loss smaller, has no resonance point, and has better performance in the low-frequency range. The sound source level curve of the double-ended symmetrical motor transducer is calculated as follows: Figure 8 , 9 shown.

[0036] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. A double-ended radiating electromechanical transducer, characterized in that: A symmetrical structure is adopted, comprising an intermediate support tube (4) arranged in the middle of the transducer, a shell (35) being symmetrically installed at both ends of the intermediate support tube (4), an intermediate rubber sleeve (36) being embedded and installed between the inner wall of the shell (35) and the outer wall of the intermediate support tube (4), and support plates (15) being installed on the shells (35) at both ends of the intermediate support tube (4); a double-axis motor (9) is arranged to penetrate the intermediate support tube (4), and two motor shafts of the double-axis motor (9) correspondingly penetrate the support plates (15) located on both sides of the intermediate support tube (4), and the two motor shafts are respectively connected to drive a small bevel gear shaft (11); the small bevel gear shaft (11) is supported on the support plate (15) by a small bevel gear bracket (14), the small bevel gear (13) mounted on the small bevel gear shaft (11) is meshed with a large bevel gear (17) for transmission, the large bevel gear (17) is mounted on a large bevel gear shaft (18), and the large bevel gear shaft (18) is supported on the support plate (15) by a large bevel gear bracket (19). 5); a radiation cover plate (29) is provided at the end of the housing (35) away from the middle support tube (4); a radiation cover plate connecting seat (28) is installed on both sides of the bottom of the radiation cover plate (29); a connecting shaft (30) extends from the radiation cover plate connecting seat (28); a driving wheel (21) is installed at each end of the large bevel gear shaft (18); an eccentric shaft (23) is provided on the end of the driving wheel (21) away from the large bevel gear shaft (18); one end of the connecting rod (24) is installed on the connecting shaft (30), the other end of the connecting rod (24) is installed on the eccentric shaft (23), and the connecting rod (24) and the radiation cover plate (29) are driven by the eccentric shaft (23) to make up and down reciprocating motion; one end of the guide rod (31) is fixed on the radiation cover plate (29), and the other end of the guide rod (31) is slidably arranged in the linear bearing (32), and the guide rod (31) and the linear bearing (32) are arranged coaxially to ensure that the radiation cover plate (29) always makes reciprocating motion along a straight line to generate sound wave radiation.

2. The double-ended radiating electromechanical transducer according to claim 1, characterized in that: The outer wall of the intermediate support tube (4) is provided with a plurality of test frame mounting holes (6) for mounting the test frame; the outer wall of the intermediate support tube (4) is provided with an air filling nozzle (7) for filling the inner cavity of the intermediate support tube (4) and the shell (35) with high-pressure gas; the outer wall of the intermediate support tube (4) is provided with a watertight connector (8), and the dual-axis motor (9) is also provided with a corresponding signal jack (1) for electrically connecting to an external servo driver to realize control of the dual-axis motor (9).

3. The double-ended radiating electromechanical transducer according to claim 1, characterized in that: A plurality of protection rods (3) are arranged along the circumference between the intermediate support cylinder (4) and the housing (35) for supporting and protecting the intermediate rubber sleeve (36).

4. The double-ended radiating electromechanical transducer according to claim 1, characterized in that: The motor shaft of the dual-shaft motor (9) is connected to the small bevel gear shaft (11) for transmission via an elastic coupling (10).

5. The double-ended radiating electromechanical transducer according to claim 1, characterized in that: The small bevel gear (13) is key-connected to the small bevel gear shaft (11), and the small bevel gear shaft (11) is supported on the small bevel gear bracket (14) through a bearing A (12).

6. The double-ended radiating electromechanical transducer according to claim 1, characterized in that: The large bevel gear (17) is key-connected to the large bevel gear shaft (18), and the large bevel gear shaft (18) is supported on the large bevel gear bracket (19) via a bearing B (20).

7. The double-ended radiating electromechanical transducer according to claim 1, characterized in that: The driving wheel (21) is key-connected to the large bevel gear shaft (18) and is stopped and fixed by a baffle A (22) to prevent circumferential rotation.

8. The double-ended radiating electromechanical transducer according to claim 1, characterized in that: One end of the connecting rod (24) is supported on the eccentric shaft (23) via a bearing C (25) and is fixed by a baffle B (26) and a stop nut (27); the other end of the connecting rod (24) is supported on the connecting shaft (30) via a bearing C (25).

9. The double-ended radiating electromechanical transducer according to claim 1, characterized in that: The top of the radiation cover plate (29) and the top of the housing (35) are sealed via a sealing rubber sleeve (37); the displacement amplitude of the radiation cover plate (29) is ±11 mm, and the frequency of the generated sound waves is 0-40 Hz.

10. The double-ended radiating electromechanical transducer according to claim 1, characterized in that: The bottom of the linear bearing (32) is fixed on the upper bracket (33), and both ends of the upper bracket (33) are fixed on the small bevel gear bracket (14) through side brackets (34).

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