CN215419859U

CN215419859U - Double-end radiation motor type transducer

Info

Publication number: CN215419859U
Application number: CN202121194515.1U
Authority: CN
Inventors: 马振; 黄东; 郝浩琦
Original assignee: 715th Research Institute of CSIC
Current assignee: 715th Research Institute of CSIC
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-01-04
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a double-end radiation motor type transducer, which relates to the field of transducers and comprises a middle supporting cylinder arranged in the middle of the transducer, wherein two ends of the middle supporting cylinder are symmetrically provided with a shell; the connecting rod and the radiation cover plate are driven by the eccentric shaft to reciprocate up and down; one end of the guide rod is fixed on the radiation cover plate, the other end of the guide rod is arranged in the linear bearing in a sliding mode, the guide rod and the linear bearing are arranged coaxially, the radiation cover plate is guaranteed to do reciprocating motion along a straight line all the time, and sound wave radiation is generated. The utility model can realize high-power and low-frequency (0 to 50Hz) sound radiation in a small-size space by utilizing the large output force of the motor and the double-end symmetrical structure, the symmetrical structure has small energy loss and convenient installation and use, and the conformal air bag structure ensures that the size is smaller.

Description

Double-end radiation motor type transducer

Technical Field

The utility model relates to the field of transducers, in particular to a double-end radiation motor type transducer.

Background

As a common device, an electric motor is a device that converts electric energy into mechanical energy for rotating a rotor. The rotation of the electronic rotor can be changed into different forms of movement by matching with other different forms of transmission devices, wherein the different forms of movement comprise linear reciprocating movement. The linear reciprocating motion of the motor has the advantages of low frequency and large displacement. Typically the motor rotates at a speed no greater than 5000 rpm, corresponding to an underwater acoustic transducer, equivalent to no greater than 83Hz, again with fewer transducer types available in the frequency band. The motor is matched with a corresponding mechanism part, and can realize reciprocating motion of centimeter, decimeter or even larger level, which is difficult to reach by the conventional underwater acoustic transducer. From the above it can be seen that the reciprocating motion driven by the motor is advantageous for application in low frequency underwater acoustic radiation. While the transducer is propelling the water to radiate acoustically, the water also gives the transducer a reaction force, forcing the transducer to follow the vibrations, which causes a large part of the energy of the transducer to be lost. The double-end symmetric structure can avoid the loss and improve the efficiency of the transducer.

Further, as the most commonly used electrodynamic transducer, there are also disadvantages in that:

1. in order to reduce the magnetic resistance, the total number of turns of the coil is less, the length of the lead is smaller, and the output force is smaller during working;

2. in the single-end radiation mode, when the cover plate pushes water, the water gives reaction force to the transducer, so that the transducer vibrates reversely, energy loss of the transducer is caused, and the asymmetrical mode also causes the performance of the transducer to be related to the installation and clamping modes, thereby increasing the use difficulty and instability of the performance;

3. in the frequency band range lower than the resonance point, most of the pushing force of the transducer is used for pushing the spring, so that the force for pushing the aqueous medium in the frequency range lower than the resonance point is small, and the performance in the low frequency range is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides the double-end radiation motor type transducer which has the advantages of simple structure, convenience in use, safety and reliability.

The purpose of the utility model is achieved by the following technical scheme: a double-end radiation motor type transducer adopts a symmetrical structure and comprises a middle supporting cylinder arranged in the middle of the transducer, wherein two ends of the middle supporting cylinder are symmetrically provided with a shell, a middle rubber sleeve is embedded between the inner wall of the shell and the outer wall of the middle supporting cylinder, and the shells at two ends of the middle supporting cylinder are provided with supporting plates; the double-shaft motor penetrates through the middle supporting cylinder and is arranged, two motor shafts of the double-shaft motor correspondingly penetrate through the supporting plates positioned on two sides of the middle supporting cylinder, and the two motor shafts are respectively connected with and drive a small bevel gear shaft; the small bevel gear shaft is supported on the supporting plate by a small bevel gear bracket, the small bevel gear sleeved on the small bevel gear shaft is in meshing transmission with the large bevel gear, the large bevel gear is sleeved on the large bevel gear shaft, and the large bevel gear shaft is supported on the supporting plate by a large bevel gear bracket; the end part of the shell far away from the middle supporting cylinder is provided with a radiation cover plate, two sides of the bottom of the radiation cover plate are respectively provided with a radiation cover plate connecting seat, a connecting shaft extends out of the radiation cover plate connecting seat, two ends of the large bevel gear shaft are respectively provided with a driving wheel, one end of the driving wheel far away from the large bevel gear shaft is provided with an eccentric shaft, one end of the connecting rod is arranged on the connecting shaft, the other end of the connecting rod is arranged on the eccentric shaft, and the connecting rod and the radiation cover plate are driven by the eccentric shaft to do up-and-down reciprocating motion; one end of the guide rod is fixed on the radiation cover plate, the other end of the guide rod is arranged in the linear bearing in a sliding mode, the guide rod and the linear bearing are arranged coaxially, the radiation cover plate is guaranteed to do reciprocating motion along a straight line all the time, and sound wave radiation is generated.

As a further technical scheme, a plurality of test jig mounting holes are formed in the outer wall of the middle support cylinder and used for mounting test jigs; the outer wall of the middle supporting cylinder is provided with an inflating nozzle for inflating high-pressure gas into the middle supporting cylinder and the inner cavity of the shell; be equipped with the watertight connector on the outer wall of middle support section of thick bamboo, also be equipped with corresponding signal jack on the biax motor for the outside servo driver of electricity connection realizes the control to the biax motor.

As a further technical scheme, a plurality of protective rods are arranged between the middle supporting cylinder and the shell along the circumference and are used for supporting and protecting the middle rubber sleeve.

As a further technical scheme, a motor shaft of the double-shaft motor is connected with a small bevel gear shaft through an elastic coupling for transmission.

As a further technical scheme, the bevel pinion is in key connection with a bevel pinion shaft, and the bevel pinion shaft is supported on a bevel pinion support through a bearing A.

As a further technical scheme, the large bevel gear is in key connection with a large bevel gear shaft, and the large bevel gear shaft is supported on a large bevel gear bracket through a bearing B.

As a further technical scheme, the driving wheel is in key connection with the large bevel gear shaft and is stopped and fixed by the baffle A to prevent circumferential rotation.

As a further technical scheme, one end of the connecting rod is supported on the eccentric shaft through a bearing C and is 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.

As a further technical scheme, the top of the radiation cover plate and the top of the shell are sealed through a sealing rubber sleeve, the displacement amplitude of the radiation cover plate is +/-11 mm, and the frequency of generated sound waves is 0-40 Hz.

As a further technical scheme, the bottom of the linear bearing is fixed on an upper support, and two ends of the upper support are fixed on a small bevel gear support through side supports.

The utility model has the beneficial effects that: the large output force and the double-end symmetrical structure of the motor are utilized, the sound radiation with high power and low frequency (0 to 50Hz) can be realized in a small-size space, the symmetrical structure has low energy loss and convenient installation and use, and the size of the conformal air bag structure is smaller.

Drawings

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

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a sectional view B-B of fig. 2.

Fig. 4 is a front view of the structure of the driving wheel.

Fig. 5 is a structural side view of the driving wheel.

Fig. 6 is a front view of the structure of the radiation cover plate connecting seat.

Fig. 7 is a structural side view of a radiation cover plate connecting seat.

Fig. 8 is a graph of sound source level of a double-ended radiation motor transducer with a cover plate radius of 150 mm.

Fig. 9 is a graph of sound source level of a double-ended radiation motor transducer at a cover plate radius of 325 mm.

Description of reference numerals: the device comprises a signal jack 1, a protective rod 3, a middle support cylinder 4, a test frame mounting hole 6, an inflating nozzle 7, a watertight connector 8, a double-shaft motor 9, an elastic coupling 10, a small bevel gear shaft 11, a bearing A12, a small bevel gear 13, a small bevel gear support 14, a support plate 15, a screw 16, a large bevel gear 17, a large bevel gear shaft 18, a large bevel gear support 19, a bearing B20, a driving wheel 21, a baffle A22, an eccentric shaft 23, a connecting rod 24, a bearing C25, a baffle B26, a stop nut 27, a radiation cover plate connecting seat 28, a radiation cover plate 29, a connecting shaft 30, a guide rod 31, a linear bearing 32, an upper support 33, a side support 34, a shell 35, a middle rubber sleeve 36 and a sealing rubber sleeve 37.

Detailed Description

The utility model will be described in detail below with reference to the following drawings:

example (b): as shown in fig. 1-7, a bi-polar radiation motor formula transducer adopts symmetrical structure, including locating the middle support section of thick bamboo 4 at transducer middle part, casing 35 is installed to the both ends symmetry of middle support section of thick bamboo 4, and rubber sleeve 36 in the middle of the embedding is installed between the inner wall of casing 35 and the outer wall of middle support section of thick bamboo 4, all installs backup pad 15 on the casing 35 at middle support section of thick bamboo 4 both ends. The double-shaft motor 9 penetrates through the middle support cylinder 4 and is arranged, two motor shafts of the double-shaft motor 9 correspondingly penetrate through the support plates 15 positioned on two sides of the middle support cylinder 4, and the two motor shafts are respectively connected through the elastic coupling 10 to drive a small bevel gear shaft 11; the small bevel gear shaft 11 is supported on a support plate 15 through a small bevel gear support 14, the small bevel gear 13 is in key connection with the small bevel gear shaft 11, the small bevel gear shaft 11 is supported on the small bevel gear support 14 through a bearing A12, the small bevel gear 13 sleeved on the small bevel gear shaft 11 is in meshed transmission with the large bevel gear 17, the large bevel gear 17 is sleeved on the large bevel gear shaft 18, the large bevel gear 17 is in key connection with the large bevel gear shaft 18, the large bevel gear shaft 18 is supported on a large bevel gear support 19 through a bearing B20, and the large bevel gear support 19 is supported on the support plate 15.

The end part of the shell 35 far away from the middle supporting cylinder 4 is provided with a radiation cover plate 29, two sides of the bottom of the radiation cover plate 29 are respectively provided with a radiation cover plate connecting seat 28, a connecting shaft 30 extends out of the radiation cover plate connecting seat 28, two ends of the large bevel gear shaft 18 are respectively provided with a driving wheel 21, the driving wheel 21 is connected with the large bevel gear shaft 18 in a key mode and is stopped and fixed by a baffle A22 to prevent circumferential rotation. The driving wheel 21 is provided with an eccentric shaft 23 at one end 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 is fixed by a baffle B26 and a stop nut 27. The connecting rod 24 and the radiation cover plate 29 are driven by the eccentric shaft 23 to reciprocate up and down; the top of the radiation cover plate 29 and the top of the shell 35 are sealed through a sealing rubber sleeve 37, the displacement amplitude of the radiation cover plate 29 is +/-11 mm, and the frequency of generated sound waves is 0-40 Hz. One end of the guide rod 31 is fixed on the radiation cover plate 29, the other end of the guide rod 31 is arranged in the linear bearing 32 in a sliding mode, and the guide rod 31 and the linear bearing 32 are arranged coaxially, so that the radiation cover plate 29 is guaranteed to do reciprocating motion along a straight line all the time, and sound wave radiation is generated. The linear bearing 32 is fixed at the bottom to an upper bracket 33, and both ends of the upper bracket 33 are fixed to the bevel pinion bracket 14 through side brackets 34.

Preferably, the outer wall of the middle supporting cylinder 4 is provided with a plurality of test jig mounting holes 6 for mounting test jigs; the outer wall of the middle supporting cylinder 4 is provided with an inflating nozzle 7 for inflating high-pressure gas into the middle supporting cylinder 4 and the inner cavity of the shell 35; the outer wall of the middle supporting cylinder 4 is provided with a watertight connector 8, and the double-shaft motor 9 is also provided with a corresponding signal jack 1 for electrically connecting an external servo driver to realize the control of the double-shaft motor 9. A plurality of protection rods 3 are circumferentially arranged between the middle supporting cylinder 4 and the shell 35 and are used for supporting and protecting the middle rubber sleeve 36. The bottom of the sealing rubber sleeve 37 is fixed with the contact part of the shell 35 by glue, and the round surface of the sealing rubber sleeve 37 is fixed with the contact part of the radiation cover plate 35 by glue, thereby realizing the sealing of the whole device.

The working process of the utility model is as follows: when the double-shaft motor works, the double-shaft motor 9 rotates to drive the small bevel gear 13 to rotate, 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 further drives the driving wheels 21 at the two ends of the large bevel gear shaft 18 to rotate. Since the shaft on the driving wheel 21 is the eccentric shaft 23, the rotation of the driving wheel 21 drives the connecting rod 24 to make a periodic reciprocating motion. The other end of the connecting rod 24 is connected with the radiation cover plate 29, so that the radiation cover plate 29 is driven to do the periodic movement of up-and-down displacement to generate sound waves, and the frequency of the sound waves is 0-40 Hz. The displacement amplitude of the radiation cover plate 29 is ± 11 mm. The radiation cover plate 29 moves linearly under the limitation of a guide mechanism consisting of a guide rod 31, a linear bearing 32, an upper bracket 33 and a side bracket 34.

The housing 35 serves as a protective housing for the transducer and is screwed to the support plate 15. The contact part of the middle rubber sleeve 36 with the shell 34 and the middle supporting cylinder 4 is fixed by glue to form the middle sealing of the double-end radiation motor type transducer. The bottom of the sealing rubber sleeve 37 is fixed with the contact part of the shell 35 by glue, and the round surface of the sealing rubber sleeve 37 is fixed with the contact part of the radiation cover plate 35 by glue, thereby realizing the sealing of the whole device. A plurality of protection rods 3 are arranged between the shell 35 and the middle supporting cylinder 4 to protect the sealing rubber sleeve. The middle supporting cylinder 4 is provided with an inflating nozzle 7, and air with certain pressure is blown to the transducer through the inflating nozzle according to the working water depth of the transducer during use, so that the stable underwater work of the transducer is ensured.

The double-end radiation motor type transducer provided by the utility model has larger electromagnetic driving force, and the double-end radiation mode ensures that the loss of the driving force is smaller, no resonance point exists and the performance in a low-frequency range is more excellent. The sound source level curves of the double-end symmetric electromechanical transducer are calculated by simulation and are shown in figures 8 and 9.

It should be understood that equivalent alterations and modifications of the technical solution and the inventive concept of the present invention by those skilled in the art should fall within the scope of the appended claims.

Claims

1. A double-end radiation motor type transducer is characterized in that: the transducer is of a symmetrical structure and comprises a middle supporting cylinder (4) arranged in the middle of the transducer, shells (35) are symmetrically arranged at two ends of the middle supporting cylinder (4), a middle rubber sleeve (36) is embedded and arranged between the inner wall of each shell (35) and the outer wall of the middle supporting cylinder (4), and supporting plates (15) are arranged on the shells (35) at two ends of the middle supporting cylinder (4); the double-shaft motor (9) penetrates through the middle supporting cylinder (4) to be arranged, two motor shafts of the double-shaft motor (9) correspondingly penetrate through the supporting plates (15) positioned on two sides of the middle supporting cylinder (4), and the two motor shafts are respectively connected with and drive a small bevel gear shaft (11); the small bevel gear shaft (11) is supported on a support plate (15) by a small bevel gear bracket (14), a small bevel gear (13) sleeved on the small bevel gear shaft (11) is in meshed transmission with a large bevel gear (17), the large bevel gear (17) is sleeved 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); the end part of the shell (35) far away from the middle supporting cylinder (4) is provided with a radiation cover plate (29), two sides of the bottom of the radiation cover plate (29) are respectively provided with a radiation cover plate connecting seat (28), a connecting shaft (30) extends out of the radiation cover plate connecting seat (28), two ends of the large bevel gear shaft (18) are respectively provided with a driving wheel (21), one end of the driving wheel (21) deviating from the large bevel gear shaft (18) is provided with an eccentric shaft (23), one end of a connecting rod (24) is arranged on the connecting shaft (30), the other end of the connecting rod (24) is arranged on the eccentric shaft (23), and the connecting rod (24) and the radiation cover plate (29) are driven by the eccentric shaft (23) to do up-down reciprocating motion; one end of a guide rod (31) is fixed on the radiation cover plate (29), the other end of the guide rod (31) is arranged in the linear bearing (32) in a sliding mode, and the guide rod (31) and the linear bearing (32) are arranged coaxially, so that the radiation cover plate (29) is guaranteed to do reciprocating motion along a straight line all the time, and sound wave radiation is generated.

2. The double-ended radiation electromechanical transducer according to claim 1, wherein: the outer wall of the middle supporting cylinder (4) is provided with a plurality of test rack mounting holes (6) for mounting test racks; the outer wall of the middle supporting cylinder (4) is provided with an inflating nozzle (7) for inflating high-pressure gas into the middle supporting cylinder (4) and the inner cavity of the shell (35); the outer wall of the middle supporting cylinder (4) is provided with a watertight connector (8), and the double-shaft motor (9) is also provided with a corresponding signal jack (1) for electrically connecting an external servo driver to realize the control of the double-shaft motor (9).

3. The double-ended radiation electromechanical transducer according to claim 1, wherein: a plurality of protective rods (3) are arranged between the middle supporting cylinder (4) and the shell (35) along the circumference and are used for supporting and protecting the middle rubber sleeve (36).

4. The double-ended radiation electromechanical transducer according to claim 1, wherein: and a motor shaft of the double-shaft motor (9) is connected with a small bevel gear shaft (11) for transmission through an elastic coupling (10).

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

6. The double-ended radiation electromechanical transducer according to claim 1, wherein: the large bevel gear (17) is connected with a large bevel gear shaft (18) in a key mode, and the large bevel gear shaft (18) is supported on a large bevel gear support (19) through a bearing B (20).

7. The double-ended radiation electromechanical transducer according to claim 1, wherein: the driving wheel (21) is connected with the big bevel gear shaft (18) in a key mode and is stopped and fixed through a baffle A (22) to prevent circumferential rotation.

8. The double-ended radiation electromechanical transducer according to claim 1, wherein: one end of the connecting rod (24) is supported on the eccentric shaft (23) through 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) through a bearing C (25).

9. The double-ended radiation electromechanical transducer according to claim 1, wherein: the top of the radiation cover plate (29) and the top of the shell (35) are sealed through a sealing rubber sleeve (37), the displacement amplitude of the radiation cover plate (29) is +/-11 mm, and the frequency of generated sound waves is 0-40 Hz.

10. The double-ended radiation electromechanical transducer according to claim 1, wherein: the bottom of the linear bearing (32) is fixed on an upper bracket (33), and two ends of the upper bracket (33) are fixed on the bevel pinion bracket (14) through side brackets (34).