CN113617620B

CN113617620B - Underwater vibration exciter and cooling method thereof

Info

Publication number: CN113617620B
Application number: CN202110947111.3A
Authority: CN
Inventors: 府晓宏; 瞿磊; 张生权
Original assignee: Suzhou Dongling Vibration Test Instrument Co Ltd
Current assignee: Suzhou Dongling Vibration Test Instrument Co Ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2023-03-24
Anticipated expiration: 2041-08-18
Also published as: CN113617620A

Abstract

The invention discloses an underwater vibration exciter and a cooling method thereof, wherein the underwater vibration exciter comprises a metal shell, a top cover which is hermetically connected and connected, a main driving fan arranged in an inner cavity of the top cover, an excitation module and a moving coil, and a mounting seat which is connected with and fixes the moving coil to the shell, wherein a cooling unit consisting of a radiator, a heat conduction pipe and a heat insulation layer is arranged in the inner cavity. An internal circulating airflow which is dispersed from bottom to top and from top to periphery and from top to bottom in a ventilation gap is formed by the main fan; the heat in the internal circulation airflow is actively transferred to the side wall of the metal shell through the radiator and the heat conduction pipe arranged in the ventilation gap, and the heat is taken away through the flowing water outside the metal shell; the heat in the internal circulation airflow is isolated by arranging a heat insulating layer. The cooling scheme of the underwater vibration exciter is beneficial to the uniformity of heat distribution in the inner cavity; and the radiator is matched with the heat conduction pipe, so that the rapid heat dissipation of the heat energy of the inner cavity and the continuous cooling by utilizing the convection water outside the metal shell are realized.

Description

Underwater vibration exciter and cooling method thereof

Technical Field

The invention relates to an underwater vibration exciter, in particular to a structure optimization and cooling method for improving the cooling capacity of a body corresponding to the underwater vibration exciter.

Background

With the deep development of ocean resources and the continuous improvement of the research level of the stealth performance of the underwater vehicle, the underwater vibration exciter is generated as a main component of a controllable vibration source according to the principle of converting electric energy into mechanical energy for output. The performance of the vibration exciter directly influences the quality of a scanning signal of the vibroseis, and the vibroseis driven by the electromagnetism can break through the limitation of frequency and meet the requirements of multi-field application.

However, the electromagnetic driving underwater vibration exciter needs to be sealed with a high-strength inner cavity, and high heat is generated in the inner cavity of the metal shell and rapidly heated along with the energy conversion of the continuous work of the vibration exciter, and when the temperature exceeds a certain upper limit, the service life of the underwater vibration exciter is influenced, and the adjustability of the vibration exciter is also influenced to a great extent. Generally, it is known that water convected by the metal shell and the outside can realize rapid heat exchange and absorb heat on the surface of the vibration exciter. Because the heat generating source is inside the excitation module, the heat energy is transferred to the metal shell in a long process, so that the heat accumulation speed is far higher than the heat dissipation speed. The cooling capacity of the current underwater vibration exciter becomes a key technical problem to be solved urgently for application and popularization of the brake toggle.

Disclosure of Invention

The invention aims to provide an underwater vibration exciter and a cooling method thereof, and solves the problems that the heat energy fluidity of an inner cavity of the vibration exciter is increased and the heat is rapidly transferred to the outer side of a metal shell.

The invention achieves the technical solution of the above-mentioned purpose that, an underwater vibration exciter comprises a metal shell, a top cover which is hermetically connected and connected, a main driving fan arranged in an inner cavity of the top cover, an excitation module and a moving coil, and a mounting seat which is connected with and fixes the moving coil to the shell, and is characterized in that: the underwater vibration exciter is characterized in that a cooling unit consisting of radiators, heat conducting pipes and a heat insulating layer is arranged in an inner cavity of the underwater vibration exciter, the radiators are annularly distributed in a ventilation gap between the excitation module and the metal shell, one end of each heat conducting pipe is integrally installed in each radiator, the other end of each heat conducting pipe is connected with the side wall of the metal shell for heat transfer, and the heat insulating layer is coated on the outer wall of the excitation module and the inner wall of the metal shell, so that the excitation module and the metal shell are isolated from the ventilation gap.

The underwater vibration exciter further comprises more than one layer of radiator arranged in the inner cavity along the height direction of the excitation module, and the two adjacent layers of radiators are arranged in a spaced mode.

The underwater vibration exciter is further characterized in that a plurality of clockwise or anticlockwise equidirectional drainage fans are distributed and installed in the ventilation gap between two adjacent layers of radiators, so that downward airflow is guided towards the circumferential direction of the excitation module.

Above-mentioned vibration exciter under water, further, every layer the radiator is the aluminium alloy shaping and separates the empty single lantern ring that cup joints in the excitation module outside, or for the aluminium alloy cutting fashioned block to separate the empty sectional type lantern ring that distributes and enclose by a plurality of blocks outside the excitation module.

The underwater vibration exciter further comprises a heat conduction pipe embedded in the wall thickness of the metal shell in a penetrating manner, the heat conduction pipe is fixed in the side wall of the metal shell in a penetrating manner through a heat insulation bolt and is in an upward inclined shape, a heat insulation filler is arranged between one section of the heat conduction pipe far away from the outer wall of the metal shell and the side wall, and the other end of the heat conduction pipe close to the outer wall of the metal shell is embedded in the side wall and is in heat conduction connection with the side wall.

The underwater vibration exciter is characterized in that the other end of the heat conducting pipe penetrates through the heat insulating layer and is fixedly attached to the inner wall of the metal shell through the heat conducting transition plate.

In the underwater vibration exciter, the heat conduction pipe is a strip-shaped body which is injected and encapsulated with heat conduction liquid and is suitable for bending modeling.

The technical solution of the present invention for achieving the above another object is a method for cooling an underwater vibration exciter, comprising: an inner circulating airflow which is dispersed from bottom to top and from top to periphery and from top to bottom in a ventilation gap is formed in the inner cavity of the metal shell through a main fan arranged at the bottom; the heat in the internal circulation airflow is actively transferred to the side wall of the metal shell by arranging the radiator and the heat conduction pipe in the ventilation gap, and the heat is taken away by the flowing water outside the metal shell; and the main body parts of the excitation module and the metal shell are isolated from the heat in the internal circulation airflow by sticking the heat-insulating layers on the outer wall of the excitation module and the inner wall of the metal shell.

The cooling method of the underwater vibration exciter further comprises the steps of arranging more than one layer of radiators in the ventilation gap along the height direction of the excitation module, installing heat conduction pipes connected with the metal shell corresponding to the radiators, and radiating heat in a layered mode along the downward air flow in the ventilation gap.

According to the cooling method of the underwater vibration exciter, furthermore, a plurality of clockwise or anticlockwise equidirectional drainage fans are distributed and connected in the ventilation gap between the adjacent radiators, so that downward airflow is guided towards the circumferential direction of the excitation module, and a vortex for prolonging a heat dissipation path is formed.

The cooling solution of the underwater vibration exciter of the invention has the prominent substantive characteristics and remarkable progress: the vibration exciter improves the circulation rate of heat generated by a heat source in the inner cavity through the internal circulation airflow, and is beneficial to the uniformity of heat distribution in the inner cavity; the radiator is matched with the heat conduction pipe, so that the heat of the internal circulation airflow can be rapidly and actively transferred to the outer side of the metal shell, and the rapid heat dissipation of the heat energy of the inner cavity and the continuous cooling of the convection water outside the metal shell are realized; and moreover, the thermal insulation layer is arranged on the outer wall of the excitation module, so that secondary heating of the excitation module by the internal circulation airflow can be avoided, and the excitation output efficiency is guaranteed.

Drawings

Fig. 1 is an axial sectional view showing the general assembly structure of the underwater vibration exciter of the present invention and a partial detail of a preferred embodiment thereof.

Fig. 2 is an axial sectional view showing the assembly structure of the underwater vibration exciter of the present invention and a partial detail of another embodiment thereof.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings for the purpose of understanding and controlling the technical solutions of the present invention, so as to define the protection scope of the present invention more clearly.

The invention aims to solve the problems that the core part of the underwater vibration exciter has serious self-heating accumulation and low cooling efficiency all the time, so that equipment cannot stably run in an underwater environment for a long time and can reliably realize the pre-designed function with high performance.

As shown in fig. 1, the underwater vibration exciter according to the present invention has a structural feature that, firstly, the existing basic structure thereof includes a metal housing 1, a top cover 2 hermetically attached thereto, a main driving fan 6 provided in an inner cavity thereof, an excitation module 3, and a moving coil 4, and a mounting base 5 connecting and fixing the moving coil to the housing. Under the normal state, the underwater vibration exciter realizes underwater operation through the sealing joint of the top cover 2 and the metal shell 1, and meanwhile, the underwater vibration exciter is assisted with a penetration cable which is not shown in the drawing to provide energy and control signals for the inner cavity. The moving coil 4 is excited by the excitation module 3 to generate longitudinal jumping to drive the floating cover to generate piston type motion relative to the top cover, so that the whole body releases vibration with fixed frequency under water.

However, the mechanical energy of the moving coil to the outside to send out vibration by excitation of the excitation module and the synchronous heat generation inside the excitation module need to be dissipated to the outside in a short time, so that the moving range of the moving coil is kept below the rated temperature. Therefore, the invention optimizes the structure of the original vibration exciter, adds a cooling unit 7 in the inner cavity of the metal shell 1 and realizes the directional flow and dissipation of the internal heat. Specifically, the cooling unit 7 is configured by distributing three parts of the heat sink 71, the heat transfer pipe 72a, and the heat insulating layer 73, which have different functions. The radiators 71 are distributed in the ventilation gap 8 between the excitation module 3 and the metal shell 1 in an annular shape, one end of the heat conduction pipe 72a is integrally attached in each radiator 71, the other end of the heat conduction pipe 72a is connected with the side wall of the metal shell for heat conduction, and the heat insulation layer 73 is wrapped on the outer wall of the excitation module 3 and the inner wall of the metal shell 1 to isolate the two parts from the ventilation gap 8.

The cooling unit can improve the cooling performance of internal heat dissipation by improving the underwater vibration exciter. Specifically, based on the originally arranged main driving fan, internal circulation airflow which overflows from the center to the top and from the top to the periphery and from the top to the bottom in the ventilation gap is formed, and the generated heat can be taken out from the inside of the excitation module to become a foundation capable of being radiated by layers along with the airflow running path. The cooling unit is additionally arranged, firstly, the heat in the internal circulation airflow is quickly absorbed by the radiator with relatively small specific heat, so that the descending airflow in the ventilation gap is gradually cooled, and when the descending airflow reaches the periphery of the bottom main driving fan and serves as an air source of the bottom main driving fan, the temperature of the descending airflow can be obviously lower than the internal temperature of the excitation module, and therefore, the heat exchange in the excitation module is facilitated. Then, the heat absorbed by the radiator is transferred to the outside by the heat conduction pipe connected with the radiator, and the heat transfer destination is directly the side wall and the outer side of the metal shell, and is the position closest to an external cold source (convective water environment) of the underwater vibration exciter. Moreover, the outer surface of the excitation module is separated from the inner circulating air flow by arranging the heat insulation layer, so that adverse effects caused by secondary heating are avoided. In the embodiment shown in fig. 1, three layers of radiators are arranged in the inner cavity along the height direction of the excitation module, two adjacent layers of radiators are arranged at intervals, and a plurality of clockwise or counterclockwise equidirectional flow guiding fans 61 are distributed and installed in ventilation gaps between the adjacent radiators. As an optimized implementation scheme, the downward airflow is guided towards the circumferential direction of the excitation module to form a spiral downward vortex, and the stroke length of the internal circulation airflow is prolonged in a large proportion, so that the time for the internal circulation airflow to contact with a radiator and absorb heat is prolonged.

As a further implementation detail, each layer of the heat radiator may be a single lantern ring formed by aluminum profiles and sleeved outside the excitation module at intervals, that is, three annular heat radiators are sleeved outside the excitation module from top to bottom, and the heat radiators are spaced from the heat insulation layer arranged on the outer wall of the excitation module and the inner wall of the metal shell, so that the internal circulation airflow can pass through the heat radiators from the middle to the bottom and can be radiated in layers along the downward airflow in the ventilation gap. Of course, besides the single ring-shaped radiator, it can also be a block cut by aluminum profile, and a segmented ring-shaped is surrounded by several blocks distributed at the outside of the excitation module at intervals.

In the preferred embodiment shown in fig. 1, the wall thickness of the metal casing 1 is suitable for inserting heat conducting pipes through it (i.e. thick casing embodiment), wherein the heat conducting pipes 72a are fixed in the side wall of the metal casing by heat insulating bolts 91 through the heat conducting pipes and are inclined upwards, and the heat conducting pipes 72a are provided with heat insulating filler 92 between a section 721a far from the outer wall of the metal casing and the side wall, and are inserted in the other end 722a near the outer wall of the metal casing and are connected to the side wall in a heat conducting manner. The heat conducting pipe 72 is a bar-shaped body which is injected and encapsulated with a heat conducting liquid and is suitable for bending modeling.

It should be noted that, corresponding to the different types of heat sink embodiments described above, the heat conducting pipes are arranged in a distributed manner with any adjustable density. Namely, for a single lantern ring radiator, the heat conduction pipes can be uniformly distributed along the circumferential direction of the radiator by more than six; for the heat sink with the segmented collar, the heat conducting pipes can be arranged corresponding to each heat sink one by one or more by one, and the purpose of the heat conducting pipes is to uniformly transfer heat outwards in the circumferential direction of the metal shell.

Based on the structural improvement of the cooling unit, the cooling realization process of the underwater vibration exciter can be understood. The cooling method comprises the following steps: firstly, forming internal circulating airflow which is dispersed from bottom to top and from top to periphery and from top to bottom in a ventilation gap in an inner cavity of a metal shell through a main fan arranged at the bottom; then through setting up radiator and heat pipe at ventilation gap distribution, with the heat initiative transmission to metal casing's lateral wall in the inner loop air current to take away the heat through the flowing water in the metal casing outside, make the down air current temperature in the ventilation gap steadily reduce, thereby provide the heat transfer basis for the inner loop air current is through exciting the inside of module. As a necessary auxiliary measure in the process, the main body parts of the excitation module and the metal shell are isolated from the heat in the internal circulation airflow by sticking the heat insulation layers on the outer wall of the excitation module and the inner wall of the metal shell. Prevent on the one hand that the excitation module from being heated by the secondary, on the other hand also makes metal casing avoid being assimilated by inner loop air current temperature, and makes its main part be close external temperature, more does benefit to the outside heat that conveys of heat pipe. Therefore, the cooling efficiency of the cooling unit to the original underwater vibration exciter is remarkably improved.

In addition to the above embodiments, there is more or less variability in the dimensions of the components for underwater exciters of various specifications. For example, when the wall thickness of the metal shell is small and the aforementioned heat pipe cannot be inserted in the metal shell, the installation manner of the heat pipe needs to be adjusted in a targeted manner. Fig. 2 is an axial sectional view showing the assembly structure of the underwater vibration exciter according to the present invention and a partial detail of another embodiment thereof. As can be seen from the figure, the metal casing has a relatively thin wall, and obviously, the heat conducting pipe cannot be penetrated and fixed therein because the vibration exciter works underwater, and the outer wall needs to bear relatively high pressure. Only the wall thickness of the thin-wall metal shell is uniform, so that the vibration exciter has pressure bearing capacity in a working environment; if still adopt the embedded scheme of above-mentioned heat pipe cross-under, will cause the influence to the overall structure intensity of vibration exciter, can't use in deep diving. In this embodiment, the other end of the heat pipe 72b penetrates the heat insulating layer and is bent so as to be attached to the inner wall of the metal case by the heat transfer plate 93. On one hand, the heat transfer efficiency of the heat conduction pipe facing the side wall of the metal shell is guaranteed, and on the other hand, the thin-wall metal shell and the external water environment are utilized for high-efficiency heat exchange.

In summary, detailed description of the embodiment of the underwater vibration exciter and the cooling method thereof can be seen, the scheme has prominent substantive features and remarkable progress: the vibration exciter has an optimized structure, the circulation rate of heat generated by a heat source in the inner cavity is improved through the internal circulation airflow, and the uniformity of heat distribution in the inner cavity is facilitated; the radiator is matched with the heat conduction pipe, so that the heat of the internal circulation airflow can be rapidly and actively transferred to the outer side of the metal shell, and the rapid heat dissipation of the heat energy of the inner cavity and the continuous cooling of the convection water outside the metal shell are realized; and moreover, the thermal insulation layer is arranged on the outer wall of the excitation module, so that secondary heating of the excitation module by the internal circulation airflow can be avoided, and the excitation output efficiency is guaranteed.

In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations are within the scope of the present invention as claimed.

Claims

1. The utility model provides an underwater vibration exciter, includes that metal casing, sealed top cap that connects and the main drive fan that its inner chamber was established, excitation module and moving coil connect and be fixed in the mount pad of shell with the moving coil, its characterized in that: a cooling unit consisting of a radiator, a heat conducting pipe and a heat insulating layer is arranged in the inner cavity of the underwater vibration exciter, wherein the radiator is annularly distributed in a ventilation gap between the excitation module and the metal shell, the heat insulating layer is coated on the outer wall of the excitation module and the inner wall of the metal shell to isolate the excitation module and the metal shell from the ventilation gap, one end of the heat conducting pipe is integrally arranged in each radiator, and the other end of the heat conducting pipe is connected with the side wall of the metal shell for heat transfer,

when the wall thickness of the metal shell is suitable for the heat conduction pipe to be embedded in the heat conduction pipe in a penetrating way, part of the section of the heat conduction pipe, which is far away from the radiator, is fixed in the side wall of the metal shell in a penetrating way through a heat insulation bolt and is in an upward inclined shape, wherein a heat insulation filler is arranged between one section of the heat conduction pipe, which is far away from the outer wall of the metal shell, and the side wall, and the end part, which is close to the outer wall of the metal shell, is embedded in the side wall and is in heat conduction connection with the side wall;

or when the metal shell is a thin wall which is not suitable for the penetration and the embedding of the heat conduction pipe, the partial section of the heat conduction pipe far away from the radiator penetrates through the heat insulation layer and is bent and shaped, and the heat conduction pipe is attached and fixed with the inner wall of the metal shell through the heat conduction transition plate;

the heat conduction pipe is a strip-shaped body which is injected and packaged with heat conduction liquid and is suitable for bending modeling.

2. The underwater vibration exciter of claim 1, wherein: along the height direction of the excitation module, more than one layer of radiators are arranged in the inner cavity, and the two adjacent layers of radiators are arranged in a spaced mode.

3. The underwater vibration exciter of claim 1, wherein: and a plurality of clockwise or anticlockwise homodromous drainage fans are distributed and arranged in a ventilation gap between two adjacent layers of radiators, so that downward airflow is guided towards the circumferential direction of the excitation module.

4. The underwater vibration exciter of claim 1, wherein: every layer the radiator is the aluminium alloy shaping and separates empty the cup joint in the single lantern ring in excitation module outside, or for the fashioned block of aluminium alloy cutting to separate the empty distribution and the sectional type lantern ring that encloses in the excitation module outside by a plurality of blocks.

5. A cooling method of an underwater vibration exciter, which is based on any one of claims 1 to 4, and is characterized by comprising the following steps:

an inner circulating airflow which is dispersed from bottom to top and from top to periphery and flows from top to bottom in a ventilation gap is formed in the inner cavity of the metal shell through a main fan arranged at the bottom;

the heat in the internal circulation airflow is actively transferred to the side wall of the metal shell by arranging the radiator and the heat conduction pipes in the ventilation gap, and the heat is taken away by flowing water outside the metal shell;

and the main body parts of the excitation module and the metal shell are isolated from the heat in the internal circulation airflow by sticking the heat-insulating layers on the outer wall of the excitation module and the inner wall of the metal shell.

6. The method for cooling an underwater vibration exciter according to claim 5, wherein: more than one layer of radiators are distributed in the ventilation gap along the height direction of the excitation module, the heat conduction pipes connected with the metal shell are connected corresponding to each radiator, and the heat is dissipated along the downward airflow in the ventilation gap in a layered mode.

7. The method for cooling an underwater vibration exciter according to claim 5, wherein: a plurality of clockwise or anticlockwise homodromous drainage fans are distributed and connected in a ventilation gap between adjacent radiators, so that downward airflow is guided towards the circumferential direction of the excitation module, and eddy current for prolonging a heat dissipation path is formed.