Lamp pump laser condensation cavity water cooling system capable of rapidly and uniformly dissipating heat

Abstract

The invention relates to the technical field of light condensing devices, in particular to a lamp pump laser light condensing cavity water cooling system capable of rapidly and uniformly dissipating heat. According to the technical scheme, the device comprises a control system and a laser communicated with the control system, the laser comprises a cavity, and the inner surface of the cavity is provided with a reflecting layer and a quartz layer covering the outer surface of the reflecting layer; the middle water spacing rings are arranged at intervals in the axial direction of the cavity, the end water spacing rings are arranged at the two ends of the cavity, the interior of the cavity is divided into transverse water cooling channels through the middle water spacing rings and the end water spacing rings, and the inner wall of the cavity is provided with a guide groove and a telescopic folding sealing ring arranged in the guide groove in a sliding mode. And the folding sealing ring seals a gap between the middle water spacing ring and the cavity wall. According to the invention, through collaborative design of multiple water cooling channels and intelligent monitoring, the heat dissipation uniformity of the lamp pump laser condensation cavity is significantly improved to optimize the beam quality, and the overall performance, stability and long-term operation reliability of the laser are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of light condensing devices, and particularly relates to a lamp-pumped laser light condensing cavity water cooling system capable of quickly and uniformly dissipating heat. BACKGROUND

[0002] Solid-state lasers are currently the most promising and effective means for obtaining high-power and high-beam-quality laser output. High-power solid-state lasers have very important application value in the fields of industrial processing, material processing, aerospace, military and the like. However, under an extremely high pumping level, the thermal effect in the solid-state laser medium is relatively serious, which to a great extent limits the further improvement of the output power of the laser. In order to improve the pumping uniformity and reduce the thermal gradient in the solid-state laser medium, researchers have proposed various structures and pumping methods of solid-state lasers including a ring-pumped round rod laser, a slab laser, a hot melt laser and the like.

[0003] Through retrieval, an invention patent with a national patent publication number CN119602057A discloses a solid-state laser light condensing cavity and a solid-state laser. The present application relates to the technical field of lasers. The solid-state laser light condensing cavity and the solid-state laser. The light source heat inside the light condensing cavity body is transferred to the water cooling sleeve through the heat conduction sleeve, the water inside the water cooling sleeve can cool the heat, and the light source is diverged and refracted. When the light source is irradiated to the light condensing reflection coating and the metal reflection film inside the water cooling sleeve, the heat is transferred to the water cooling sleeve through the heat conduction graphite film, and the heat is also transferred out through the heat dissipation fins, so that the heat can be quickly and effectively dissipated, and the surface of the solid-state laser is prevented from being overheated.

[0004] The patent mainly focuses on the heat dissipation problem of the whole cavity, but does not fully consider the uneven heat distribution of the crystal rod inside the cavity. In fact, the cold and hot difference inside the crystal rod will directly affect the output quality of the laser, and then affect the overall beam quality of the system. Therefore, by accurately adjusting the crystal rod to ensure its cold and hot consistency, not only the beam quality can be effectively improved, but also the performance of the crystal can be prevented from being reduced due to the large temperature difference, so as to improve the long-term stability of the system.

[0005] In addition, the patent scheme does not consider the influence of water quality change on the cooling system in the long-term operation. With the passage of time, impurities and sediments in the water may have a negative impact on the cooling effect, and then affect the heat dissipation performance of the cavity. Therefore, timely monitoring of water quality change and taking effective measures to maintain the stability and cleanliness of water quality not only helps to improve the cooling efficiency, but also helps to reduce the equipment failure rate. Through these measures, the electrical-optical conversion efficiency of the system can be significantly improved, and the system can be efficiently and stably operated.

[0006] To solve the above problems, the application provides a lamp-pumped laser condensing cavity water cooling system capable of quickly dissipating heat in the transverse direction. SUMMARY

[0007] The application aims to solve the problem of uneven heat distribution of the crystal rod in the laser condensing cavity existing in the background art, and provides a lamp-pumped laser condensing cavity water cooling system capable of quickly and uniformly dissipating heat.

[0008] The technical scheme of the application is a lamp-pumped laser condensing cavity water cooling system capable of quickly and uniformly dissipating heat, comprising:

[0009] a control system and a laser connected thereto;

[0010] The laser comprises:

[0011] a cavity, the inner surface of which is provided with a reflective layer and a quartz layer covering the outer surface of the reflective layer;

[0012] a plurality of intermediate water separation rings arranged along the axial direction of the cavity, and end water separation rings arranged at the two ends of the cavity, the intermediate water separation rings and the end water separation rings separating the cavity into transverse water cooling channels;

[0013] a guide groove arranged on the inner wall of the cavity and a retractable folding sealing ring slidingly arranged in the guide groove, the folding sealing ring sealing the gap between the intermediate water separation ring and the cavity wall;

[0014] a push-pull plate connecting all the intermediate water separation rings and the end water separation rings, the push-pull plate being provided with an adjusting mechanism for adjusting the spacing between the intermediate water separation rings;

[0015] left and right end plates fixed at the two ends of the cavity, the left and right end plates being provided with crystal support frames, and the crystal support frames being provided with plate crystal rods;

[0016] a xenon lamp arranged around the end face of the cavity.

[0017] Optionally, the control system comprises:

[0018] a water pump, the output end of which is connected to the water inlet of the cavity through a connecting pipe, and the input end of which is connected to a water inlet pipe;

[0019] a control system support platform, a motor being fixed on the control system support platform, and the water pump being connected to the output shaft of the motor;

[0020] a filter screen arranged at the water inlet end of the water pump.

[0021] Optionally, the control system further comprises:

[0022] a data receiving module and a data display module arranged on the control system support platform.

[0023] Optionally, the adjusting mechanism comprises a top screw penetrating the push-pull plate, and the end of the top screw abuts against the surface of the middle water stop ring.

[0024] Optionally, the laser further comprises:

[0025] a cavity support plate;

[0026] a cavity support column vertically arranged at the four corners of the cavity support plate, and the cavity support column is fixedly connected with the cavity;

[0027] a locking bolt penetrating the cavity support column, and the locking bolt fastens the cavity and the cavity support plate.

[0028] Optionally, the crystal support frame further comprises:

[0029] a crystal protection sleeve covering the crystal bar;

[0030] a support frame sealing ring arranged at the end of the crystal support frame.

[0031] Optionally, the left end plate and the right end plate are fixed to the end of the cavity by fixing bolts.

[0032] Optionally, the screw-in depth of the top screw is adjustable, so that the spacing between adjacent water stop rings is 1-5 mm.

[0033] Optionally, the thickness of the quartz layer is 0.5-1 mm, and the difference between the refractive index of the quartz layer and the refractive index of the cooling water is less than 0.1.

[0034] Compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0035] By designing a controllable multiple water cooling channel, the temperature uniformity of the crystal rod in the cavity is significantly improved, the thermal lens effect is reduced, and the quality of the laser beam is improved.

[0036] Combined with the water quality filtration and monitoring system, the water quality can be detected and adjusted in real time, ensuring the cleanliness inside the cavity, effectively prolonging the service life of the system and improving the electro-optical conversion efficiency.

[0037] By precisely controlling the cooling channel and the water stop ring design, the cooling effect of the system is optimized, ensuring long-term efficient and stable operation of the laser system, avoiding the negative impact of overheating on the performance of the laser.

[0038] The double protection design of the reflective layer and the quartz layer not only improves the optical efficiency of the system, but also prevents the scouring of the water flow on the reflective layer, ensuring the long-term stability of the reflective layer.

[0039] The present application is designed in cooperation with multiple water cooling channels and intelligent monitoring, which can significantly improve the heat dissipation uniformity of the lamp-pumped laser condensing cavity to optimize the beam quality, and help to improve the overall performance, stability and long-term reliability of the laser. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is a structure diagram of a lamp-pumped laser condensing cavity water cooling system with fast and uniform heat dissipation.

[0041] Figure 2 It is a cavity structure diagram of a lamp-pumped laser condensing cavity water cooling system with fast and uniform heat dissipation.

[0042] Figure 3 It is a partial cross-sectional structure diagram of a condensing cavity of a lamp-pumped laser condensing cavity water cooling system with fast and uniform heat dissipation.

[0043] Figure 4 It is a partial end face structure diagram of a condensing cavity of a lamp-pumped laser condensing cavity water cooling system with fast and uniform heat dissipation.

[0044] The drawings show that: 1, control system; 11, motor; 12, water pump; 13, filter screen; 14, water inlet pipe; 15, connecting pipe; 16, water outlet pipe; 17, control system support platform; 18, data receiving module; 19, data display module; 2, laser; 201, fixing bolt; 202, locking bolt; 203, cavity support plate; 204, cavity support column; 205, left end plate; 206, right end plate; 207, xenon lamp sealing cover plate; 208, xenon lamp; 209, cavity; 210, batten crystal; 211, crystal support frame; 212, crystal protection sleeve; 213, support frame sealing ring; 214, end water separation ring; 215, reflection layer; 216, quartz layer; 217, middle water separation ring; 218, top screw; 219, folded sealing ring; 220, guide groove; 221, push-pull plate. DETAILED DESCRIPTION

[0045] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all embodiments.

[0046] The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0047] Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0048] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0050] Embodiments

[0051] As shown in Figure 1 , the present application provides a lamp pump laser condensing cavity water cooling system capable of rapid and uniform heat dissipation, which comprises a control system 1 and a laser 2 connected thereto. The two parts will be described in detail below.

[0052] As shown in Figure 1 and Figure 2 , the control system 1 comprises a water pump 12 and a control system support platform 17. The output end of the water pump 12 is connected to the water inlet of the cavity 209 through a connecting pipe 15, and the input end is connected to a water inlet pipe 14. A motor 11 is fixed on the control system support platform 17. The water pump 12 is connected with the output shaft of the motor 11, and a filter screen 13 is installed at the water inlet end of the water pump 12. The motor 11 drives the water pump 12 to suck in the cooling water through the water inlet pipe 14. After the water flow is intercepted by the filter screen 13, it is pumped into the cavity 209 through the connecting pipe 15. The filter screen 13 prevents scale from blocking the flow channel and ensures long-term heat dissipation efficiency.

[0053] As shown in Figure 1 , a data receiving module 18 and a data display module 19 are installed on the control system support platform 17. The data double module intelligently monitors and displays abnormal conditions in real time. The data receiving module 18 collects water temperature, flow and water quality data in real time, and the data display module 19 displays the data dynamically.

[0054] As Figure 2 and Figure 3 shown, the laser 2 includes a cavity 209 and a cavity support plate 203, the cavity support plate 203 is vertically installed with cavity support columns 204 at four corners, the cavity support columns 204 are fixedly connected with the cavity 209, the cavity support columns 204 are threadedly penetrated and installed with locking bolts 202, the locking bolts 202 fasten the cavity 209 and the cavity support plate 203. The cavity support columns 204 rigidly fix the cavity 209 on the cavity support plate 203 through the locking bolts 202. The cavity 209 is provided with a reflecting layer 215 on its inner surface and a quartz layer 216 covering the outer surface of the reflecting layer 215, the thickness of the quartz layer 216 is 0.5-1mm, the difference between its refractive index and the refractive index of the cooling water is less than 0.1, a ring-shaped array of xenon lamps 208 is arranged around the end face of the cavity 209, the reflecting layer 215 of the cavity inner wall converges the scattered light of the xenon lamp 208, the quartz layer 216 isolates the water flow from erosion, reduces the pump light loss, and improves the photoelectric conversion efficiency.

[0055] As Figures 2-4 shown, in the embodiment, the laser 2 further includes a plurality of intermediate water isolation rings 217 arranged along the axial direction of the cavity 209 and end water isolation rings 214 arranged at both ends of the cavity 209; wherein the inner wall of the cavity 209 is provided with a guide groove 220 and a telescopic folding sealing ring 219 slidingly arranged in the guide groove 220. It should be noted that all the intermediate water isolation rings 217 and the end water isolation rings 214 are connected with a push-pull plate 221, the push-pull plate 221 is provided with an adjusting mechanism for adjusting the distance between the intermediate water isolation rings 217, the adjusting mechanism includes a jackscrew 218 penetrating through the push-pull plate 221, the end of the jackscrew 218 abuts against the surface of the intermediate water isolation ring 217, the penetration depth of the jackscrew 218 is adjustable, so that the distance between the adjacent water isolation rings is 1-5mm. The intermediate water isolation rings 217 and the end water isolation rings 214 divide the cavity into axial laminar flow channels. The transverse laminar flow design improves the heat dissipation efficiency and weakens the thermal lens effect. When the cooling water flows transversely across the quartz layer 216, the folding sealing ring 219 telescopes to compensate for thermal deformation in the guide groove 220. The push-pull plate 221 adjusts the distance between the water isolation rings to 1-5mm through the jackscrew 218 to control the water flow cross section. The adjustable distance water isolation ring precisely matches the pump power (such as 3mm distance corresponding to 10kW power), the axial temperature difference of the crystal is reduced to ±0.5℃, the folding sealing ring 219 dynamically seals, and the pressure bearing capacity reaches 2MPa, completely solving the problem of thermal expansion cracking of the traditional sealing ring.

[0056] In addition, the left end plate 205 and the right end plate 206 are fixed at both ends of the cavity 209, the left end plate 205 and the right end plate 206 are fixed on the end part of the cavity 209 through the fixed bolt 201, the crystal support frame 211 is arranged on the left end plate 205 and the right end plate 206, the strip crystal 210 is arranged in the crystal support frame 211, the crystal support frame 211 further comprises a crystal protection sleeve 212 covering the strip crystal 210, and the support frame sealing ring 213 is arranged on the end part of the crystal support frame 211. The strip crystal 210 is covered by the crystal protection sleeve 212 (aluminum nitride ceramic, heat conduction > 200 W / m·K), and heat is directly transmitted to the cooling water. The support frame sealing ring 213 compresses and seals the gap between the end plates, and the fixed bolt 201 locks the end plates and the cavity. The crystal protection sleeve 212 has high heat conduction, and the temperature gradient of the crystal surface is reduced. The support frame sealing ring 213 and the folded sealing ring 219 are designed to realize zero leakage and long service life.

[0057] In the present application, after the system is started, the control system 1 monitors the temperature, water flow and water quality parameters in real time through the data receiving module 18, and drives the motor 11 to start the water pump 12. The external cooling water enters the water pump 12 through the water inlet pipe 14, is purified by the filter screen 13, and is delivered to the inside of the cavity 209 of the laser 2 through the connecting pipe 15. The water flow is divided into horizontal laminar flow channels by the end water separation ring 214 and the plurality of intermediate water separation rings 217 in the cavity 209, the folded sealing ring 219 is stretched and contracted in the guide groove 220 to ensure the sealing property, and the push-pull plate 221 adjusts the distance between the end water separation ring 214 and the intermediate water separation ring 217 through the top wire 218 to optimize the cooling area.

[0058] The cooling water flows horizontally through the quartz layer 216 and the reflecting layer 215 on the inner wall of the cavity 209, quickly absorbs the heat generated by the xenon lamp 208, and uniformly covers the surface of the strip crystal 210. The support frame sealing ring 213 and the crystal protection sleeve 212 of the crystal support frame 211 ensure that the water flow stably contacts the crystal, and the cavity support plate 203 and the cavity support column 204 fix the position of the crystal through the locking bolt 202, thereby maintaining the stability of the light path. The water after heat absorption returns to the external water tank through the water outlet pipe 16 to circulate and dissipate heat, the filter screen 13 continuously intercepts impurities, the data display module 19 displays the water quality state in real time, and triggers an alarm or adjusts the power of the water pump 12 when an abnormality occurs.

[0059] The xenon lamp 208 surrounds the end surface of the cavity 209 and uniformly pumps, the reflecting layer 215 converges the scattered light to the strip crystal 210, and the quartz layer 216 protects the reflecting layer 215 from being washed by the water flow. The left end plate 205 and the right end plate 206 are fastened through the fixed bolt 201, the flow field is dynamically adjusted by combining the end water separation ring 214 and the intermediate water separation ring 217, and the thermal lens effect is reduced. The system realizes efficient heat dissipation through the horizontal multiple water cooling channels, the sealing structure and the intelligent monitoring, the temperature gradient is obviously reduced, the electro-optical conversion efficiency is significantly improved, and the long-term stable output of the laser 2 with high beam quality is guaranteed.

[0060] The above specific embodiments are only several optional embodiments of the present application, and based on the technical solutions of the present application and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A water cooling system for a lamp-pumped laser focusing cavity capable of rapid and uniform heat dissipation, characterized in that: include: A control system (1) and a laser (2) connected thereto; The laser (2) comprises: A cavity (209) having an inner surface provided with a reflective layer (215) and a quartz layer (216) covering an outer surface of the reflective layer (215); A plurality of middle water-isolating rings (217) arranged at intervals along the axial direction of the cavity (209), and end water-isolating rings (214) provided at both ends of the cavity (209); A guide groove (220) provided on the inner wall of the cavity (209) and a retractable foldable sealing ring (219) slidably provided in the guide groove (220); A push-pull plate (221) connecting all the middle water-isolating rings (217) and the end water-isolating rings (214), wherein the push-pull plate (221) is provided with an adjustment mechanism for adjusting the spacing between the middle water-isolating rings (217); A left end plate (205) and a right end plate (206) fixed at both ends of the cavity (209), wherein a crystal support frame (211) is provided on the left end plate (205) and the right end plate (206), and a slab crystal (210) is installed in the crystal support frame (211); A xenon lamp (208) is arranged around the end surface of the cavity (209).

2. The water cooling system for a lamp-pumped laser focusing cavity capable of rapid and uniform heat dissipation according to claim 1, characterized in that: The control system (1) comprises: A water pump (12), the output end of which is connected to the water inlet of the cavity (209) via a connecting pipe (15), and the input end of which is connected to the water inlet pipe (14); A control system supporting platform (17), wherein a motor (11) is fixed to the control system supporting platform (17), and the water pump (12) is connected to an output shaft of the motor (11); A filter screen (13) is provided at the water inlet end of the water pump (12).

3. The water cooling system for a lamp-pumped laser focusing cavity capable of rapid and uniform heat dissipation according to claim 2, characterized in that: The control system (1) further comprises: A data receiving module (18) and a data display module (19) are arranged on a control system support platform (17).

4. The water cooling system for a lamp-pumped laser focusing cavity capable of rapid and uniform heat dissipation according to claim 1, characterized in that: The adjustment mechanism comprises a top screw (218) penetrating the push-pull plate (221), and the end of the top screw (218) abuts against the surface of the middle water spacer (217).

5. The water cooling system for a lamp-pumped laser focusing cavity capable of rapid and uniform heat dissipation according to claim 1, characterized in that: The laser (2) further comprises: Cavity support plate (203); Cavity support columns (204) are vertically arranged at the four corners of the cavity support plate (203), and the cavity support columns (204) are fixedly connected to the cavity (209); A locking bolt (202) passes through the cavity support column (204), and the locking bolt (202) fastens the cavity (209) and the cavity support plate (203).

6. The water cooling system for a lamp-pumped laser focusing cavity capable of rapid and uniform heat dissipation according to claim 1, characterized in that: The crystal support frame (211) further includes: a crystal protection sleeve (212) covering the lath crystal (210); A support frame sealing ring (213) is provided at the end of the crystal support frame (211).

7. The water cooling system for a lamp-pumped laser focusing cavity capable of rapid and uniform heat dissipation according to claim 1, characterized in that: The left end plate (205) and the right end plate (206) are fixed to the ends of the cavity (209) by fixing bolts (201).

8. The water cooling system for a lamp-pumped laser focusing cavity capable of rapid and uniform heat dissipation according to claim 1, characterized in that: The screwing depth of the top screw (218) is adjustable so that the spacing between adjacent water-blocking rings is 1 to 5 mm.

9. The water cooling system for a lamp-pumped laser focusing cavity capable of rapid and uniform heat dissipation according to claim 1, characterized in that: The thickness of the quartz layer (216) is 0.5-1 mm, and the difference between its refractive index and the refractive index of cooling water is less than 0.1.

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