CN115657294B - Spiral adjustable high-power laser liquid cooling stop diaphragm - Google Patents
Spiral adjustable high-power laser liquid cooling stop diaphragm Download PDFInfo
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- CN115657294B CN115657294B CN202211672964.1A CN202211672964A CN115657294B CN 115657294 B CN115657294 B CN 115657294B CN 202211672964 A CN202211672964 A CN 202211672964A CN 115657294 B CN115657294 B CN 115657294B
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Abstract
The invention provides a spiral adjustable high-power laser liquid-cooled stop diaphragm, which comprises a plurality of diaphragm blades and a driving assembly for driving the diaphragm blades to rotate, wherein microchannels are arranged in inner cavities of the diaphragm blades; the adjacent diaphragm blades are partially overlapped, and a plurality of diaphragm blades are combined into a fan blade structure with an adjustable central area aperture; the driving assembly drives the plurality of diaphragm blades to rotate simultaneously so as to realize aperture adjustment, and meanwhile, the refrigerating liquid flowing in the micro-channel cools the diaphragm blades. According to the invention, the driving component is arranged, and the plurality of diaphragm blades rotate simultaneously under the driving of the driving component, so that the aperture of the central area of the formed fan blade structure is changed continuously, and the purpose of adjusting the aperture is achieved; meanwhile, the micro channel is arranged in the diaphragm blade, the diaphragm blade can be cooled under the synergistic effect of the micro channel and the refrigerating liquid, and the diaphragm blade is prevented from being thermally deformed, so that the phenomena of light path stability reduction, light beam quality reduction and the like are prevented.
Description
Technical Field
The invention relates to the technical field of diaphragms, in particular to a spiral adjustable high-power laser liquid cooling stop diaphragm.
Background
The diaphragm is an entity which plays a role in limiting light beams in an optical system and is an important component of the optical system. The diaphragm can adjust the aperture size of the optical system to limit the size of the imaging light beam, and simultaneously change the field of view and vignetting of the optical system, thereby improving the imaging quality.
In order to improve the adaptability of the diaphragm, most of the common diaphragms are variable diaphragms with adjustable light hole sizes. The aperture adjustment principle of the conventional iris diaphragm is to install a mechanical linkage mechanism between a plurality of blades constituting the iris diaphragm to realize the synchronous movement of each diaphragm blade, thereby changing the size of the aperture in the middle of the diaphragm blades. However, such a mechanical linkage is cumbersome and inconvenient to adjust by hand, which greatly affects the practicality thereof.
The patent with the application number of CN202111003804.3 discloses an aperture diaphragm adjusting method and an aperture diaphragm adjusting device of a terahertz imaging system, the device combines a plurality of diaphragm blades to form a fan blade structure with a closed central area under a closed state, each diaphragm blade is provided with a rotating connection point on the periphery, the rotating shaft of a single steering engine is fixedly connected with the rotating connection points of the corresponding diaphragm blades, the array angles of the diaphragm blades are synchronously controlled through the same steering engine rotating angle controller, the synchronous movement of the diaphragm blades is realized, and therefore the size of the aperture diaphragm of the central area corresponding to the fan blade structure is changed. Although the aperture size of the central area of the diaphragm blade can be conveniently adjusted by the device, the diaphragm blade is only of a simple blade structure, the device cannot realize timely heat dissipation of the diaphragm blade, for high-power laser, the high-power laser is usually multimode laser, a large amount of stray light is contained outside a circular light spot, the stray light has extremely high energy density, the stray light emitted by the high-power laser is intercepted and absorbed by the diaphragm blade, and the thermal deformation of the diaphragm blade is more easily caused.
In view of the above, there is a need to design an improved spiral adjustable high-power laser liquid-cooled stop diaphragm to solve the above problems.
Disclosure of Invention
The invention aims to provide a spiral adjustable high-power laser liquid-cooling stop diaphragm.A plurality of diaphragm blades rotate simultaneously under the driving of a driving component by arranging the driving component, so that the aperture (namely the diaphragm aperture) of the central area of a fan blade structure formed by the diaphragm blades is changed continuously, and the purpose of adjusting the aperture is achieved; meanwhile, the micro-channel is arranged in the diaphragm blade, and the diaphragm blade can be cooled (the diaphragm blade is heated due to the fact that stray light emitted by high-power laser is intercepted) under the synergistic effect of the micro-channel and refrigerating liquid in the micro-channel, so that the diaphragm blade is prevented from being thermally deformed, and phenomena such as reduction of light path stability and light beam quality are caused.
In order to achieve the purpose, the invention provides a spiral adjustable high-power laser liquid-cooled stop diaphragm which comprises a plurality of diaphragm blades and a driving assembly for driving the diaphragm blades to rotate, wherein a micro-channel for refrigerating liquid to pass through is arranged in an inner cavity of each diaphragm blade; the aperture of the micro-channel is 0.01-1mm, and the shape of the micro-channel is one or more of horizontal straight shape, oblique straight shape, S shape, annular shape or bionic shape; the adjacent diaphragm blades are partially overlapped, and a plurality of diaphragm blades are combined into a fan blade structure with adjustable central area aperture; the driving assembly drives the plurality of diaphragm blades to rotate simultaneously so as to realize aperture adjustment, and meanwhile, the refrigerating liquid flowing in the micro-channel cools the diaphragm blades.
As a further improvement of the invention, the diaphragm blade is provided with a liquid inlet and a liquid outlet which are communicated with the micro-channel, and refrigerating liquid enters the micro-channel from the liquid inlet and flows out from the liquid outlet.
As a further improvement of the present invention, the driving assembly includes a plurality of driving motors, and each of the diaphragm blades is provided with one of the driving motors; and each diaphragm blade is provided with a shaft hole, and the shaft hole is used for the rotating shaft of the driving motor to pass through.
As a further improvement of the present invention, the driving assembly further includes a rotation angle controller, the plurality of driving motors are connected to the rotation angle controller through electric wires, and the rotation angle controller is configured to control rotation of the driving motors, so as to control a rotation angle of each of the diaphragm blades.
As a further improvement of the invention, the control angle of the corner controller is 0-75 deg.
As a further improvement of the invention, the rotation angles of each diaphragm blade are the same, so that the angle changes of a plurality of diaphragm blades are synchronously increased or decreased.
As a further improvement of the invention, one surface of each diaphragm blade facing the light source is coated with a black light absorption substance for absorbing stray light emitted by laser and preventing the stray light from reflecting to cause damage to the light emitting device.
As a further improvement of the invention, the diaphragm blade is formed by surrounding a straight edge and two arc-shaped edges, and the liquid inlet and the liquid outlet are arranged on the arc-shaped edges.
The beneficial effects of the invention are:
(1) According to the spiral adjustable high-power laser liquid-cooled stop diaphragm provided by the invention, the driving assembly is arranged, the plurality of diaphragm blades are driven by the driving assembly to rotate simultaneously, and in the rotating process of the diaphragm blades, the aperture (namely, the diaphragm hole diameter) of the central area of a fan blade structure formed by the plurality of diaphragm blades is continuously changed, so that the rapid adjustment of the aperture of the diaphragm is realized, and the laser light path is adjusted more conveniently, rapidly and stably. Meanwhile, the micro channel is arranged in the diaphragm blade, so that the diaphragm blade can be cooled by the micro channel (the diaphragm blade is heated by intercepting stray light emitted by laser), and the diaphragm blade is prevented from being thermally deformed, so that the phenomena of light path stability reduction, light beam quality reduction and the like are avoided.
(2) According to the invention, the micro-channel is arranged in the inner cavity of the diaphragm blade, the diaphragm blade absorbs stray light emitted by high-power laser to heat up in the light emitting time, the heat of the stray light absorbed by the diaphragm blade is transferred to the refrigerating liquid flowing in the micro-channel, firstly, the Reynolds number of the refrigerating liquid in the micro-channel is higher, and a strong turbulent flow state is presented, so that the heat exchange efficiency can be greatly improved, secondly, the thermal boundary layer of the refrigerating liquid is extremely thin in the micro-channel, so that the thermal resistance of the boundary layer can be greatly reduced, the temperature rise of the diaphragm blade can be greatly inhibited through the synergistic effect of the refrigerating liquid and the micro-channel, so that the diaphragm blade is fully cooled and radiated in the light emitting time, the problems of thermal deformation of the diaphragm blade in the light emitting process, thermal distortion in the laser transmission process caused by the temperature rise of air at the diaphragm hole and the like are effectively inhibited, and the beam quality in the laser transmission process is improved.
Drawings
Fig. 1 is a schematic structural diagram of the spiral adjustable high-power laser liquid-cooled stop diaphragm of the invention when the output angle of the rotation angle controller is 0 °.
Fig. 2 is a schematic structural diagram of the spiral adjustable high-power laser liquid-cooling stop diaphragm when the output angle of the angle controller is 10 °.
Fig. 3 is a schematic structural diagram of the spiral adjustable high-power laser liquid-cooling stop diaphragm of the invention when the output angle of the rotation angle controller is 75 °.
Fig. 4 is a schematic perspective view of a diaphragm blade.
Fig. 5 is a schematic top view of a diaphragm blade.
Fig. 6 is a schematic sectional structure view of the diaphragm blade.
Reference numerals
1-a diaphragm blade; 2-a drive assembly; 3-a microchannel; 4-an electric wire; 11-straight side; 12-short arc edge; 13-long arc edge; 14-a shaft hole; 15-liquid inlet; 16-a liquid outlet; 21-a drive motor; 22-corner controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1 to 6, the invention provides a spiral adjustable high-power laser liquid-cooled stop diaphragm, which includes a plurality of diaphragm blades 1 and a driving assembly 2 for driving the diaphragm blades 1 to rotate, wherein a microchannel 3 is arranged in an inner cavity of the diaphragm blades 1; the aperture of the micro-channel 3 is 0.01-1mm, and the shape of the micro-channel 3 is one or more of horizontal straight shape, oblique straight shape, S shape, annular shape or bionic shape; the adjacent diaphragm blades 1 are partially overlapped, and a plurality of diaphragm blades 1 are combined into a fan blade structure with an adjustable central area aperture (namely, the diaphragm aperture). With the arrangement, the plurality of diaphragm blades 1 are driven to rotate simultaneously by the driving component 2, and the aperture of the central area of the fan blade structure formed by the plurality of diaphragm blades 1 is changed in the rotating process of the diaphragm blades 1, so that the aperture is adjusted; meanwhile, the diaphragm blade 1 is heated up due to the fact that stray light generated by high-power laser is intercepted, refrigerating liquid flowing in the micro-channel 3 can cool the diaphragm blade 1, and the diaphragm blade 1 is prevented from being thermally deformed, so that phenomena of reduction of light path stability, reduction of light beam quality and the like are avoided.
As shown in fig. 4 to 6, the diaphragm blade 1 is surrounded by one straight edge and two arc-shaped edges, specifically, the diaphragm blade 1 is surrounded by a straight edge 11, a short arc edge 12, and a long arc edge 13. The number of diaphragm blades 1 is at least 4, and theoretically the number of diaphragm blades 1 can be infinite. The surface of each diaphragm blade 1 facing the light source is coated with black light absorption materials, so that in the transmission process of high-power laser, the area outside the diaphragm aperture can continuously absorb stray light emitted by the laser, and the damage of a light emitting device caused by the reflection of the stray light is prevented. The more the number of the diaphragm blades 1 is, the more convenient the adjustment of the diaphragm aperture is (the sensitivity of aperture adjustment is improved, namely the aperture change is larger under the same rotation angle), and the better the stray light can be intercepted (the heat of the stray light is uniformly distributed on more diaphragm blades, and the maximum temperature rise of a single diaphragm blade is reduced).
In the process of mutually combining the diaphragm blades 1, an overlapping area exists between each diaphragm blade 1 and two adjacent diaphragm blades 1, each diaphragm blade 1 is positioned above the diaphragm blade 1 on the left side of the diaphragm blade 1, and is positioned below the diaphragm blade 1 on the right side of the diaphragm blade 1, that is, the diaphragm blades 1 are distributed and arranged in an up-and-down stacked manner.
As shown in fig. 1 to 3, the driving assembly 2 includes a plurality of driving motors 21, and each of the diaphragm blades 1 is provided with one driving motor 21. Specifically, each diaphragm blade 1 is provided with a shaft hole 14, and a rotating shaft of the driving motor 21 passes through the shaft hole 14 and is fixed to the diaphragm blade 1, that is, the driving motor 21 is fixedly connected to the diaphragm blade 1 through the rotating shaft. The axis of the rotating shaft of the drive motor 21 coincides with the axis of the drive motor 21.
The driving assembly 2 further comprises a corner controller 22, and the plurality of driving motors 21 are connected with the corner controller 22 through electric wires 4. The rotation direction of the driving motors 21 controlled by the rotation angle controller 22 can be clockwise or counterclockwise (the aperture of the clockwise rotating diaphragm is increased, and the aperture of the counterclockwise rotating diaphragm is decreased), and the rotation angle controller 22 controls the plurality of driving motors 21 to rotate simultaneously, so that the plurality of diaphragm blades 1 are adjusted to rotate simultaneously, and the cooperative rotation of the plurality of diaphragm blades 1 is realized; meanwhile, the rotation angle of each diaphragm blade 1 is the same to ensure that the angular changes of several diaphragm blades 1 are increased or decreased synchronously. In addition, the rotation angle controller 22 can freely set the output angle, thereby controlling the rotation angle of a plurality of diaphragm blades 1 to realize the regulation and control of the diaphragm aperture. The output angle of the angle controller 22 is 0-75 °.
As shown in fig. 1, in the initial state, the output angle of the rotation angle controller 22 is 0 °, and the aperture size of the diaphragm is 0, i.e., the center of the diaphragm is completely closed. As shown in fig. 2, the output angle of the angle controller 22 is 10 °, and a circular hole with a smaller aperture appears in the center of the diaphragm. As shown in fig. 3, when the output angle of the angle controller 22 is 75 °, the aperture size at the center of the diaphragm reaches the maximum, and at this time, the straight edges 11 of each diaphragm blade 1 combine to form a diaphragm aperture, and the diaphragm blades 1 can ensure that a closed region is formed outside the diameter of the circular aperture, and the closed region can intercept and absorb stray light emitted by laser. When the output angle of the rotation angle controller 22 is greater than 75 °, the adjacent diaphragm blades 1 are not overlapped, and at this time, the straight edges 11 of the diaphragm blades 1 cannot form a closed diaphragm hole, which not only leaks light, but also prevents normal light blocking; meanwhile, stray light emitted by laser cannot be effectively intercepted and absorbed, and the laser cannot work normally.
In practice, both the shape and the size of the diaphragm blade 1 have an influence on the aperture of the diaphragm aperture. The diaphragm blades 1 of the same shape and different sizes can output different maximum diaphragm aperture values. Theoretically, by adjusting the shape, size and number of the diaphragm blades 1, an infinite diaphragm aperture adjustment range can be achieved. In addition, different sizes and shapes of the diaphragm blades 1 also influence the output angle of the angle controller 22. The shape of the diaphragm blade 1 is not limited to the blade shape of the present invention, the maximum output angles of diaphragm blades 1 of different shapes are different, and the rotation angle range of the theoretical diaphragm blade 1 should be 0-90 °.
The solid inner cavity of the diaphragm blade 1 is provided with a micro-channel 3. The diameter of the micro-channel 3 is 0.01-1mm, the shape is one or more of horizontal straight shape (as shown in figure 6), oblique straight shape, S shape, ring shape and bionic shape, and the bionic shape can be snowflake shape, tree-like shape, vein shape and the like. The microchannels 3 are intended for the passage of a refrigerating liquid. Compared with the conventional common water channel for heat dissipation, the micro-channel 3 has smaller characteristic size of a flow channel, the Reynolds number of the fluid in the micro-channel 3 is higher, a strong turbulent flow state is presented, and the heat exchange efficiency can be greatly improved; secondly, in the micro-channel 3, the thermal boundary layer of the fluid is extremely thin, so that the thermal resistance of the boundary layer can be greatly reduced; therefore, the refrigerating liquid introduced into the micro-channel 3 is less, and meanwhile, the better refrigerating effect can be ensured, and the micro-channel can be better applied to high-power laser. Furthermore, due to the small size of the microchannels 3, shapes and structures can be freely arranged in the diaphragm blade 1.
High work absorbed by the diaphragm blades 1The heat of the stray light generated by the laser is transferred to the refrigerating liquid in the micro-channel 3, the refrigerating liquid is preferably low-temperature water, and the heat dissipation power of the low-temperature water can reach 100W/cm 2 The diaphragm cooling device can be well used for cooling the diaphragm of a high-power laser system, and simultaneously, by means of the characteristics of the micro-channel 3 and the synergistic effect of the low-temperature water and the micro-channel 3, the diaphragm blade 1 can be sufficiently cooled and radiated in the light emitting time.
As shown in fig. 4 to 6, each diaphragm blade 1 has an inlet 15 and an outlet 16 on its short arc 12, and the refrigerant liquid enters the microchannel 3 through the inlet 15 and flows out of the outlet 16 (the inlet 15 and the outlet 16 may be interchanged). The cooling capacity provided by the refrigerating liquid in the micro-channel 3 can be used for cooling the high-power laser system.
The liquid inlet 15 can be connected to a water chilling unit through a hose so as to realize the continuous circulation of low-temperature refrigeration water in the micro-channel 3.
The working principle of the spiral adjustable high-power laser liquid cooling stop diaphragm is as follows: firstly, a required output angle is set for the corner controller 22, the corner controller 22 controls all the driving motors 21 to start working, and each driving motor 21 drives the corresponding diaphragm blade 1 to start rotating, so that the diaphragm aperture is adjusted to achieve the required diaphragm aperture. In this process, the rotation angle and the rotation direction of each diaphragm blade 1 are the same. In the light-emitting time, the diaphragm blades 1 can absorb stray light emitted by high-power laser to heat up, the heat of the stray light absorbed by the diaphragm blades 1 is transferred to the refrigerating liquid flowing in the micro-channel 3, and the diaphragm blades 1 are fully cooled and radiated in the light-emitting time through the synergistic effect of the refrigerating liquid and the micro-channel 3.
In summary, according to the spiral adjustable high-power laser liquid-cooled stop diaphragm provided by the invention, by arranging the driving assembly, the plurality of diaphragm blades rotate simultaneously under the driving of the driving assembly, so that the aperture (i.e. the diaphragm aperture) of the central area of the formed fan blade structure is changed continuously, and the purpose of adjusting the aperture is achieved; meanwhile, the micro-channel is arranged in the diaphragm blade, the diaphragm blade can be cooled (the diaphragm blade is heated due to the fact that stray light emitted by high-power laser is intercepted) under the synergistic effect of the micro-channel and the refrigerating liquid in the micro-channel, and the diaphragm blade is prevented from being thermally deformed, so that the phenomena of reduction of light path stability, light beam quality and the like are caused.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (3)
1. A spiral adjustable high-power laser liquid-cooling stop diaphragm is characterized by comprising a plurality of diaphragm blades and a driving assembly for driving the diaphragm blades to rotate, wherein microchannels for refrigerating liquid to pass through are arranged in inner cavities of the diaphragm blades;
the diaphragm blade is formed by surrounding a straight edge, a short arc edge and a long arc edge, a liquid inlet and a liquid outlet which are communicated with the micro-channel are formed in the short arc edge of the diaphragm blade, and refrigerating liquid enters the micro-channel from the liquid inlet and flows out of the liquid outlet; the refrigerating liquid is low-temperature water;
the aperture of the micro-channel is 0.01mm, and the shape of the micro-channel is one or more of horizontal straight shape, oblique straight shape, S shape, annular shape or bionic shape; the adjacent diaphragm blades are partially overlapped, and a plurality of diaphragm blades are combined into a fan blade structure with adjustable central area aperture;
the driving assembly comprises a plurality of driving motors, and each diaphragm blade is provided with one driving motor; each diaphragm blade is provided with a shaft hole, and the shaft hole is used for a rotating shaft of the driving motor to pass through; the driving assembly further comprises a corner controller, a plurality of driving motors are connected with the corner controller through electric wires, and the corner controller is used for controlling the driving motors to rotate so as to control the rotation angle of each diaphragm blade; the output angle of the corner controller is 0-75 degrees;
the driving assembly drives the plurality of diaphragm blades to rotate simultaneously so as to realize aperture adjustment, and meanwhile, the refrigerating liquid flowing in the micro-channel cools the diaphragm blades.
2. The liquid-cooled stop diaphragm according to claim 1, wherein the rotation angles of the diaphragm blades are the same, so as to ensure that the angle changes of the diaphragm blades are increased or decreased synchronously.
3. The liquid-cooled stop diaphragm for high power laser with adjustable helix of claim 1, wherein one surface of each diaphragm blade facing the light source is coated with a black light absorbing substance for absorbing stray light emitted by the laser and preventing the stray light from being reflected to damage the light emitting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211672964.1A CN115657294B (en) | 2022-12-26 | 2022-12-26 | Spiral adjustable high-power laser liquid cooling stop diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211672964.1A CN115657294B (en) | 2022-12-26 | 2022-12-26 | Spiral adjustable high-power laser liquid cooling stop diaphragm |
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| CN115657294A CN115657294A (en) | 2023-01-31 |
| CN115657294B true CN115657294B (en) | 2023-04-11 |
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Family Cites Families (13)
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| US5096384A (en) * | 1990-07-27 | 1992-03-17 | The Marley Cooling Tower Company | Plastic fan blade for industrial cooling towers and method of making same |
| DE19848104A1 (en) * | 1998-10-19 | 2000-04-20 | Asea Brown Boveri | Turbine blade |
| DE102005044471A1 (en) * | 2004-09-17 | 2006-03-23 | Girlich, Dieter, Dr. | Metal foam for use in flow machines where has a rotor and/or stator made completely of open-pore cast metal foam |
| CN100589019C (en) * | 2006-06-09 | 2010-02-10 | 亚洲光学股份有限公司 | Small drive device for diaphragm and shutter |
| GB2497975B (en) * | 2011-12-23 | 2016-05-11 | Agilent Technologies Inc | Adjustable aperture device with integral aperture holes |
| KR20150003182A (en) * | 2012-03-07 | 2015-01-08 | 내셔널 유니버시티 오브 싱가포르 | A mems iris diaphragm for an optical system and method for adjusting a size of an aperture thereof |
| CN103412400B (en) * | 2013-07-20 | 2015-12-02 | 中国科学院光电技术研究所 | Heat diaphragm adjustable type segmented supporting device for coaxial solar telescope |
| CN106435355A (en) * | 2016-08-31 | 2017-02-22 | 南京赛达机械制造有限公司 | Water-cooled type steam turbine vane |
| US12042881B2 (en) * | 2018-12-14 | 2024-07-23 | Rtx Corporation | System and method for laser drilling of shaped cooling holes |
| CN110401093A (en) * | 2019-08-01 | 2019-11-01 | 杭州奥创光子技术有限公司 | A kind of compact water cold stop |
| CN113586166B (en) * | 2021-07-20 | 2022-09-16 | 西安交通大学 | Turbine blade with kerosene cooling micro-channel |
| CN113589539A (en) * | 2021-08-30 | 2021-11-02 | 上海亨临光电科技有限公司 | Aperture diaphragm adjusting method and device of terahertz imaging system |
| CN216434534U (en) * | 2021-12-27 | 2022-05-03 | 中国人民解放军军事科学院国防工程研究院 | Iris diaphragm device for shading energy type optical system |
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