Rotating mirror system with heat dissipation structure

Abstract

The utility model discloses a rotating mirror system with a heat dissipation structure, which comprises an outer rotating mirror device, the rotating mirror device comprises an outer shell and a rotating mirror arranged in the outer shell, the rotating mirror comprises a rotating mirror body and a driving shaft arranged on the rotating mirror body, and the driving shaft extends out of the outer shell; the outer shell is also provided with an observation window; the rotating mirror system with the heat dissipation structure further comprises the heat dissipation structure installed in the outer shell. The heat dissipation structure comprises an external water-cooling heat dissipation system and an internal water-cooling heat dissipation system which are installed in the outer shell. According to the rotating mirror system with the heat dissipation structure, through the non-contact water cooling design of the inner layer and the outer layer, the heat dissipation problem of the rotating mirror in the high-power long-time laser cleaning process is solved, and it is guaranteed that the cleaning system is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of laser processing, in particular to a rotating mirror system with a heat dissipation structure. Background Art

[0002] With the continuous advancement of industrial development, the continuous demand for industrial upgrading and intelligent manufacturing, and the urgent requirement for environmental friendliness, laser cleaning has the advantages of high efficiency, cleanliness, low cost and convenience compared with traditional cleaning technology in the fields of industrial molds, microelectronics, ships, petrochemicals, aerospace, cultural relics, and construction, making it a new cleaning method to replace traditional cleaning methods. The development of laser cleaning equipment is in its infancy, and its demand is growing continuously.

[0003] Although laser cleaning technology has developed rapidly in recent years, and the types of cleaning materials and application areas have continued to expand, there are still many problems in laser cleaning that have not been solved. It is still in the development stage and there is still a long way to go before the mature application of laser cleaning equipment. At present, laser cleaning mainly uses a galvanometer to change the position of the laser, and then uses a field lens system to focus the energy, which ultimately acts on the surface of the workpiece. Due to the limitations of the vibration frequency, vibration angle, and lens size of the galvanometer, the laser cleaning effect is uneven, the cleaning efficiency is low, and it cannot meet the cleaning needs of large equipment.

[0004] The rotating mirror laser cleaning technology has become the mainstream technology for laser cleaning due to its advantages such as uniform cleaning and wide amplitude range. The rotating mirror is made of a multi-faceted mirror. Due to the coating process requirements, it is impossible to achieve a single coating on all surfaces, and only one surface can be coated at a time. Due to the surface workpiece support and coating process problems, there will be about 1mm of quartz glass at the corners of the multi-faceted mirror that is not coated with a film, which will cause the laser to leak into the interior of the rotating mirror, irradiate the mechanical structure or affect the film system after multiple internal reflections, and finally cause the film system to burn. At the same time, during the high-power laser cleaning process, due to the high-speed rotation characteristics of the rotating mirror, it cannot be directly water-cooled and dissipated, which will cause damage to the film system during the long-term cleaning process, and even cause the rotating mirror to break. Therefore, it is urgent to propose a water-cooling and heat dissipation technology for high-power rotating mirrors to reduce the temperature accumulation of the rotating mirror, increase the service life of the cleaning equipment, and meet the requirements of long-term laser cleaning. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a rotating mirror system with a heat dissipation structure to solve the problem of heat dissipation difficulty caused by the high-speed rotation characteristics of the rotating mirror in the rotating mirror system of the prior art during high-power laser cleaning.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions to achieve the above problems: a rotating mirror system with a heat dissipation structure, comprising an external rotating mirror device, the rotating mirror device comprising an outer shell and a rotating mirror installed in the outer shell, the rotating mirror comprising a rotating mirror body and a driving shaft installed on the rotating mirror body, the driving shaft extending out of the outer shell; the outer shell is also provided with an observation window;

[0007] The rotating mirror system with a heat dissipation structure also includes a heat dissipation structure installed in the outer shell;

[0008] The heat dissipation structure includes an external water-cooling heat dissipation system and an internal water-cooling heat dissipation system installed in the outer shell;

[0009] The external water cooling system is 1.5 mm away from the outer contour of the rotating mirror body;

[0010] The internal water cooling and heat dissipation system is 1.5 mm away from the inner contour of the rotating mirror body.

[0011] The utility model also has the following technical features:

[0012] The rotating mirror body is generally in the shape of a polygonal column, and includes an inner ring and a plurality of reflectors mounted on the outer edge contour of the inner ring, wherein the plurality of reflectors are connected end to end to form a polygonal reflector group;

[0013] The inner ring is in the shape of a hollow polygonal column, and the contour of the reflector assembly matches the outer contour of the inner ring.

[0014] The external water cooling system is 1.5 mm away from the outer contour of the reflector assembly;

[0015] The internal water cooling system is 1.5 mm away from the inner contour of the inner ring.

[0016] The external water-cooling heat dissipation system includes an external water-cooling radiator installed between the outer shell and the rotating mirror body and an external heat dissipation water channel arranged in the external water-cooling radiator. The external water-cooling heat dissipation system also includes an external water inlet and an external water outlet installed on the external water-cooling radiator. The external water inlet and the external water outlet are respectively connected to the external heat dissipation water channel.

[0017] The internal water-cooling heat dissipation system comprises an internal water-cooling radiator mounted on the outer shell and an internal heat dissipation water channel arranged in the internal water-cooling radiator;

[0018] The internal water-cooling radiator is mounted on the outer shell through a mounting plate, and the mounting plate is mounted outside the outer shell;

[0019] The internal water-cooling heat dissipation system further comprises an internal water inlet and an internal water outlet installed on the internal water-cooling radiator, and the internal water inlet and the internal water outlet are respectively connected to the internal heat dissipation water channel.

[0020] The internal water-cooling radiator comprises a first internal water-cooling radiator, a second internal water-cooling radiator and a third internal water-cooling radiator which are coaxially connected in sequence;

[0021] The first internal water-cooling radiator and the second internal water-cooling radiator are both cylindrical, and the diameter and height of the first internal water-cooling radiator are greater than the diameter and height of the second internal water-cooling radiator;

[0022] The first internal water-cooling radiator is connected to the mounting plate;

[0023] The third internal water-cooling radiator is generally in a truncated cone shape, and the end with a smaller diameter is connected to the second internal water-cooling radiator;

[0024] The outer surface of the third internal water-cooling radiator is subjected to a roughening treatment and then a black oxidation treatment;

[0025] The internal heat dissipation water channels are arranged in the first internal water-cooling radiator, the second internal water-cooling radiator and the third internal water-cooling radiator.

[0026] Compared with the prior art, the utility model has the following technical effects:

[0027] (I) The utility model provides a rotating mirror system with a heat dissipation structure, which solves the heat dissipation problem of the rotating mirror during high-power and long-term laser cleaning through a non-contact water cooling design of the inner and outer layers, thereby ensuring that the cleaning system is safe and reliable.

[0028] (II) The utility model provides a rotating mirror system with a heat dissipation structure, in which the internal water-cooled heat dissipation system is tilted and roughened to dissipate and absorb the laser transmitted through the corners of the rotating mirror, thereby preventing the transmitted light from re-entering the rotating mirror and affecting it. This design reduces the temperature of the rotating mirror system and improves the safety and reliability of long-term laser cleaning.

[0029] (III) The rotating mirror system with a heat dissipation structure provided by the utility model has a simple structure, is easy to operate, safe and reliable, and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic cross-sectional view of the overall structure of the rotating mirror system with a heat dissipation structure of the utility model.

[0031] Figure 2 It is a schematic diagram of the external structure of the rotating mirror system with a heat dissipation structure of the utility model.

[0032] Figure 3 It is a schematic diagram of the arrangement position of the heat dissipation structure of the rotating mirror system with heat dissipation structure of the utility model.

[0033] Figure 4 It is a structural schematic diagram of a rotating mirror body of a rotating mirror system with a heat dissipation structure of the utility model.

[0034] Figure 5 It is a structural schematic diagram of the internal water-cooling radiator of the rotating mirror system with a heat dissipation structure of the utility model.

[0035] Figure 6 This is a comparison diagram of the effects of the present utility model.

[0036] The meaning of each symbol in the accompanying drawings:

[0037] 1-rotating mirror device, 2-heat dissipation structure;

[0038] 1-1-outer shell, 1-2-rotating mirror, 1-3-observation window;

[0039] 1-2-1-rotating mirror body, 1-2-2-driving shaft;

[0040] 1-2-1-1-inner ring, 1-2-1-2-reflector;

[0041] 2-1-external water cooling system, 2-2-internal water cooling system;

[0042] 2-1-1-external water cooling radiator, 2-1-2-external cooling water channel;

[0043] 2-2-1 internal water cooling radiator, 2-2-2 internal cooling water channel;

[0044] 2-2-1-0-mounting plate, 2-2-1-1-first internal water-cooling radiator, 2-2-1-2-second internal water-cooling radiator, 2-2-1-3-third internal water-cooling radiator;

[0045] The specific contents of the utility model are further explained in detail below in conjunction with the embodiments. DETAILED DESCRIPTION

[0046] All components in the present invention, unless otherwise specified, are components known in the prior art.

[0047] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of the present application fall within the protection scope of the present invention.

[0048] Embodiment 1:

[0049] This embodiment provides a rotating mirror system with a heat dissipation structure, as shown in 1-3, comprising a rotating mirror device 1, wherein the rotating mirror device 1 comprises an outer shell 1-1 and a rotating mirror 1-2 installed in the outer shell 1-1, wherein the rotating mirror 1-2 comprises a rotating mirror body 1-2-1 and a driving shaft 1-2-2 installed on the rotating mirror body 1-2-1, wherein the driving shaft 1-2-2 extends out of the outer shell 1-1; an observation window 1-3 is also provided on the outer shell 1-1;

[0050] The rotating mirror system with a heat dissipation structure further comprises a heat dissipation structure 2 installed in the outer shell 1-1;

[0051] The heat dissipation structure includes an external water-cooling heat dissipation system 2-1 and an internal water-cooling heat dissipation system 2-2 installed in the outer shell 1-1;

[0052] The external water cooling system 2-1 is 1.5 mm away from the outer contour of the rotating mirror body 1-2-1;

[0053] The internal water cooling and heat dissipation system 2-2 is 1.5 mm away from the inner contour of the rotating mirror body 1-2-1.

[0054] The solution of this embodiment solves the heat dissipation problem of the rotating mirror during high-power and long-term laser cleaning, ensuring the safety and reliability of the cleaning system. The advantages of this solution are that on the one hand, the temperature of the inner and outer surfaces can be reduced through the non-contact water cooling design of the inner and outer layers, and on the other hand, the scattering and absorption of the transmitted light of the rotating mirror can be achieved through the tilt angle and roughening design, thereby reducing the temperature of the rotating mirror.

[0055] The utility model proposes a high-power rotating mirror scattering design which mainly includes a rotating mirror system, an internal water-cooling heat dissipation system and an external water-cooling heat dissipation system. At the same time, the internal water-cooling heat dissipation system is processed at an inclined angle and roughened to dissipate and absorb the laser transmitted through the corners of the rotating mirror, thereby preventing the transmitted light from re-entering the rotating mirror and affecting the rotating mirror. This design reduces the temperature of the rotating mirror system and improves the safety and reliability of long-term laser cleaning.

[0056] As a preferred embodiment of this invention:

[0057] like Figure 4 As shown, the rotating mirror body 1-2-1 is generally in the shape of a polygonal column, including an inner ring 1-2-1-1 and a plurality of reflectors 1-2-1-2 installed on the outer edge contour of the inner ring 1-2-1-1, and the plurality of reflectors 1-2-1-2 are connected end to end to form a polygonal reflector group;

[0058] The inner ring 1-2-1-1 is in the shape of a hollow polygonal column, and the contour of the reflector assembly matches the outer contour of the inner ring 1-2-1-1.

[0059] The rotating mirror body 1-2-1 is rotatably arranged in the outer shell 1-1 and driven by the motor 6 to reflect the adjusted laser light so as to output it from the output port of the outer shell 1-1 to realize the scanning cleaning work. Figure 4 As shown, the rotating mirror body 1-2-1 is generally in the shape of a polygonal prism, including an inner ring 1-2-1-1 and a plurality of reflectors 1-2-1-2 installed on the outer edge contour of the inner ring 1-2-1-1, forming a polygonal prism reflector group. After the optical path mirror group reflects the laser onto the reflector group, the mirror surface of the reflector group will reflect the laser and output it. Since the reflector group works in rotation, the laser's injection and emission angles will change continuously, causing the laser to swing to perform scanning cleaning. Preferably, the reflector group uses 12 mirrors, and each face of the reflector group can cause the laser to swing back and forth once, thereby achieving high-frequency laser cleaning.

[0060] As a preferred embodiment of this invention:

[0061] The external water cooling system 2-1 is 1.5 mm away from the outer contour of the reflector assembly;

[0062] The internal water cooling system 2-2 is 1.5 mm away from the inner contour of the inner ring 1-2-1-1.

[0063] As a preferred embodiment of this invention:

[0064] The external water-cooling heat dissipation system 2-1 includes an external water-cooling radiator 2-1-1 installed between the outer shell 1-1 and the rotating mirror body 1-2-1 and an external heat dissipation water channel 2-1-2 arranged in the external water-cooling radiator 2-1-1. The external water-cooling heat dissipation system 2-1 also includes an external water inlet and an external water outlet installed on the external water-cooling radiator 2-1-1. The external water inlet and the external water outlet are respectively connected to the external heat dissipation water channel 2-1-2.

[0065] As a preferred embodiment of this invention:

[0066] The internal water-cooling heat dissipation system 2-2 comprises an internal water-cooling radiator 2-2-1 mounted on the outer shell 1-1 and an internal heat dissipation water channel 2-2-2 arranged in the internal water-cooling radiator 2-2-1;

[0067] The internal water-cooled radiator 2-2-1 is mounted on the outer shell 1-1 through a mounting plate 2-2-1-0, and the mounting plate 2-2-1-0 is mounted outside the outer shell 1-1;

[0068] The internal water-cooling heat dissipation system 2-2 also includes an internal water inlet and an internal water outlet installed on the internal water-cooling radiator 2-2-1, and the internal water inlet and the internal water outlet are respectively connected to the internal heat dissipation water channel 2-2-2.

[0069] As a preferred embodiment of this invention:

[0070] like Figure 5 As shown, the internal water-cooled radiator 2-2-1 includes a first internal water-cooled radiator 2-2-1-1, a second internal water-cooled radiator 2-2-1-2 and a third internal water-cooled radiator 2-2-1-3 which are coaxially connected in sequence;

[0071] The first internal water-cooling radiator 2-2-1-1 and the second internal water-cooling radiator 2-2-1-2 are both cylindrical, and the diameter and height of the first internal water-cooling radiator 2-2-1-1 are greater than the diameter and height of the second internal water-cooling radiator 2-2-1-2;

[0072] The first internal water-cooling radiator 2-2-1-1 is connected to the mounting plate 2-2-1-0;

[0073] The third internal water-cooling radiator 2-2-1-3 is generally in a truncated cone shape, and the end with a smaller diameter is connected to the second internal water-cooling radiator 2-2-1-2;

[0074] The outer surface of the third internal water-cooling radiator 2-2-1-3 is roughened and then subjected to black oxidation treatment;

[0075] The internal heat dissipation water channel 2-2-2 is arranged in the first internal water-cooling radiator 2-2-1-1, the second internal water-cooling radiator 2-2-1-2 and the third internal water-cooling radiator 2-2-1-3.

[0076] Figure 3 This is a cross-sectional view of the present embodiment. It can be seen from the figure that the inside and outside of the rotating mirror are surrounded by the water-cooling heat dissipation module without contact, thereby achieving efficient heat dissipation. At the same time, the laser transmitted through the corners of the rotating mirror can be dissipated and absorbed by the internal water-cooling heat dissipation design module to prevent the laser from being reflected back to the rotating mirror system.

[0077] Effect verification:

[0078] Based on this design, relevant experimental research was completed to compare the mirror temperature with and without internal cooling. The surface temperature of the internal mirror was observed through observation windows 1-3. The laser power was 12kW and the irradiation time was 20 minutes. Figure 6It is a temperature comparison before and after adding water cooling design inside the rotating mirror. It can be seen from the figure that when the internal water cooling structure design is not added, the surface temperature of the rotating mirror ranges from 45-87℃, the temperature rise is obvious, and it takes 17 minutes to reach thermal equilibrium. After adding the internal water cooling structure design, the surface temperature of the rotating mirror ranges from 37.5-43.2℃, and the temperature rise is not obvious. Through comparison, it is found that the high-power rotating mirror heat dissipation design structure proposed in this patent has a significant improvement on the surface temperature of the rotating mirror, and the experimental effect is verified by the embodiment, which is effective and improves the working time and reliability of laser cleaning.

[0079] The above technical solutions are only preferred specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be thought of by any technician familiar with the field within the technical scope disclosed by the present utility model without creative work are all covered within the protection scope of the present utility model.

Claims

1. A rotating mirror system with a heat dissipation structure, comprising a rotating mirror device (1), wherein the rotating mirror device (1) comprises an outer shell (1-1) and a rotating mirror (1-2) installed in the outer shell (1-1), wherein the rotating mirror (1-2) comprises a rotating mirror body (1-2-1) and a driving shaft (1-2-2) installed on the rotating mirror body (1-2-1), wherein the driving shaft (1-2-2) extends out of the outer shell (1-1), and an observation window (1-3) is also provided on the outer shell (1-1); characterized in that: The rotating mirror system with a heat dissipation structure further comprises a heat dissipation structure (2) installed in the outer shell (1-1); The heat dissipation structure (2) comprises an external water-cooling heat dissipation system (2-1) and an internal water-cooling heat dissipation system (2-2) installed in the outer shell (1-1); The external water cooling and heat dissipation system (2-1) is 1.5 mm away from the outer contour of the rotating mirror body (1-2-1); The internal water cooling and heat dissipation system (2-2) is 1.5 mm away from the inner contour of the rotating mirror body (1-2-1).

2. The rotating mirror system with a heat dissipation structure according to claim 1, characterized in that: The rotating mirror body (1-2-1) is generally in the shape of a polygonal column, comprising an inner ring (1-2-1-1) and a plurality of reflectors (1-2-1-2) mounted on the outer edge contour of the inner ring (1-2-1-1), wherein the plurality of reflectors (1-2-1-2) are connected end to end to form a reflector group in the shape of a polygonal column; The inner ring (1-2-1-1) is in the shape of a hollow polygonal column, and the contour of the reflector assembly matches the outer contour of the inner ring (1-2-1-1).

3. The rotating mirror system with a heat dissipation structure according to claim 2, characterized in that: The external water cooling system (2-1) is 1.5 mm away from the outer contour of the reflector assembly; The internal water cooling and heat dissipation system (2-2) is 1.5 mm away from the inner contour of the inner ring (1-2-1-1).

4. The rotating mirror system with a heat dissipation structure according to claim 3, characterized in that: The external water-cooling heat dissipation system (2-1) comprises an external water-cooling radiator (2-1-1) installed between the outer shell (1-1) and the rotating mirror body (1-2-1) and an external heat dissipation water channel (2-1-2) arranged in the external water-cooling radiator (2-1-1), and the external water-cooling heat dissipation system (2-1) also comprises an external water inlet and an external water outlet installed on the external water-cooling radiator (2-1-1), and the external water inlet and the external water outlet are respectively connected to the external heat dissipation water channel (2-1-2).

5. The rotating mirror system with a heat dissipation structure according to claim 3, characterized in that: The internal water-cooling heat dissipation system (2-2) comprises an internal water-cooling radiator (2-2-1) mounted on the outer shell (1-1) and an internal heat dissipation water channel (2-2-2) arranged in the internal water-cooling radiator (2-2-1); The internal water-cooling radiator (2-2-1) is mounted on the outer shell (1-1) via a mounting plate (2-2-1-0), and the mounting plate (2-2-1-0) is mounted outside the outer shell (1-1); The internal water-cooling heat dissipation system (2-2) further comprises an internal water inlet and an internal water outlet installed on the internal water-cooling radiator (2-2-1), and the internal water inlet and the internal water outlet are respectively connected to the internal heat dissipation water channel (2-2-2).

6. The rotating mirror system with a heat dissipation structure according to claim 5, characterized in that: The internal water-cooling radiator (2-2-1) comprises a first internal water-cooling radiator (2-2-1-1), a second internal water-cooling radiator (2-2-1-2) and a third internal water-cooling radiator (2-2-1-3) which are coaxially connected in sequence; The first internal water-cooling radiator (2-2-1-1) and the second internal water-cooling radiator (2-2-1-2) are both cylindrical, and the diameter and height of the first internal water-cooling radiator (2-2-1-1) are greater than the diameter and height of the second internal water-cooling radiator (2-2-1-2); The first internal water-cooling radiator (2-2-1-1) is connected to the mounting plate (2-2-1-0); The third internal water-cooling radiator (2-2-1-3) is generally in a truncated cone shape, and the end with a smaller diameter is connected to the second internal water-cooling radiator (2-2-1-2); The outer surface of the third internal water-cooling radiator (2-2-1-3) is roughened and then subjected to black oxidation treatment; The internal heat dissipation water channel (2-2-2) is arranged in the first internal water-cooling radiator (2-2-1-1), the second internal water-cooling radiator (2-2-1-2) and the third internal water-cooling radiator (2-2-1-3).

Images