Atomizer heat dissipation mechanism

Abstract

The utility model discloses a heat dissipation mechanism of an atomizer, which relates to the technical field of atomizer equipment parts, and comprises machine bases and a coil pipe spirally wound on the machine bases, the coil pipe is communicated with an external water tank, a driving device is arranged in the water tank and is connected with the coil pipe, a main shaft is rotatably connected between the machine bases through a bearing, and the main shaft is connected with the water tank through a bearing. The main shaft is connected with an atomizing disc through a connecting shaft, a groove matched with the coil pipe is formed in the surface of the machine base, the coil pipe is buckled in the groove through a heat conduction protrusion, and the coil pipe is a flexible metal braided pipe. The technical problem to be solved by the utility model is to provide the atomizer heat dissipation mechanism which is continuously communicated with an external cooling medium, so that the heat dissipation effect is improved, the heat conduction effect is enhanced, and the emulsification phenomenon is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of atomizer equipment components, specifically to an atomizer heat dissipation mechanism. Background Technology

[0002] High-speed atomizers, especially centrifugal atomizers such as rotary disc / wheel atomizers used in spray drying and metal powder preparation, are key equipment in modern industry for achieving efficient droplet breakage and uniform atomization. At their core lies an atomizing disc driven by a motor, rotating at high speeds of tens to hundreds of thousands of revolutions per minute. Under these extreme conditions, an efficient heat dissipation structure design is crucial for the reliability, stability, lifespan, and final product quality of the equipment. The drive motor, especially a built-in high-speed motor, generates significant heat through winding copper losses, core iron losses, and mechanical friction during the conversion of electrical energy into mechanical energy. When the atomizing disc rotates at high speed, its surface and edges experience intense friction with the surrounding air or process gas, generating aerodynamic heat; the higher the rotational speed, the greater the heat generation. If processing high-temperature molten metal or preheated liquids, the atomizing disc itself will also absorb some of the material's heat. The core components of an atomizer, such as the motor, bearings, and atomizing disc, are typically integrated into a very compact space, especially in applications requiring airtightness, where the design space for a heat dissipation structure is extremely limited. Traditional heat dissipation methods involve cooling oil, with the oil pipes immersed in a water tank for cooling. However, when the pipe body ruptures, the oil and water can easily mix, causing emulsification. Furthermore, the heat transfer efficiency of the oil pipes is slow, and the cooling effect of the oil is not complete. Utility Model Content

[0003] Technical problem to be solved by the utility model

[0004] The technical problem to be solved by this utility model is to provide an atomizer heat dissipation mechanism that continuously connects to an external cooling medium, improves heat dissipation, enhances thermal conductivity, and avoids emulsification.

[0005] Technical solution

[0006] To solve the above problems, the technical solution provided by this utility model is as follows:

[0007] A heat dissipation mechanism for an atomizer includes a base and a coil spirally wound around the base. The coil is connected to an external water tank. A drive device is installed inside the water tank and connected to the coil. A main shaft is rotatably connected between the bases via bearings. The main shaft is connected to an atomizing disc via a connecting shaft. The surface of the base has a groove adapted to the coil. The coil is fastened into the groove by a heat-conducting protrusion. The coil is a flexible metal braided tube.

[0008] The metal coil and the close contact design of the heat-conducting protrusions / grooves form an efficient heat conduction path, significantly reducing thermal resistance and improving heat dissipation. A water pump drives a continuous flow of chilled water through the coil, dynamically removing heat with a much higher efficiency than static or low-flow-rate oil cooling, providing forced circulation cooling. The spiral winding and groove design maximizes the heat dissipation area of ​​the chassis surface, increasing the contact area. Water, as a cooling medium, typically has a higher heat removal capacity per unit volume (specific heat capacity) than oil, utilizing water's high specific heat capacity to improve heat dissipation efficiency. The coil directly, over a large area, and tightly adheres to the heat source surface of the chassis through the heat-conducting protrusions and grooves, directly contacting the heat source and enhancing heat conduction. The heat-conducting protrusion / grooving structure is designed to reduce contact thermal resistance and is a feature specifically designed to enhance heat conduction. The metal coil itself has good thermal conductivity, making it a high-thermal-conductivity material, further improving heat conduction efficiency. Cooling oil is eliminated, and water is used directly as the cooling medium. Even if the coil breaks (the metal braided tubing is more resistant to breakage), only water leaks, completely eliminating the possibility of oil-water emulsification and preventing emulsification. The design of the flexible metal braided tubing also improves its rupture resistance, further reducing the risk of leakage. Flexible coils: can be tightly wound onto complex-shaped bases, adapting to limited spaces. Embedding the coils into the base surface does not occupy excessive external space, maintaining a compact structure.

[0009] Optionally, the coil is connected to a first cooling water inlet and a first cooling water outlet, the first cooling water inlet being connected to the bottom of the coil via a pipe, and the first cooling water outlet being connected to the top of the coil via a pipe.

[0010] Bottom water inlet ensures full coverage, while top water outlet facilitates venting. Together, these features virtually eliminate the risk of air trapped within the coils, guaranteeing smooth cooling water flow and 100% effective utilization of the heat exchange area. The cold water inlet corresponds to the low-temperature end of the unit (just cooled), while the hot water outlet corresponds to the high-temperature end (requiring cooling), maintaining a good temperature difference along the flow path. The natural tendency of cold water sinking and hot water rising is utilized in the design, reducing flow resistance (especially providing assistance when pump power is insufficient or during unexpected shutdowns). Avoiding air resistance and ensuring smooth water flow directly affects the stability of heat dissipation, preventing overheating damage to equipment due to poor heat dissipation. During system startup and water injection or unexpected pressure loss, gravity helps water remain at the bottom of the coils (entering through the bottom inlet), providing a basis for re-establishing circulation and reducing the risk of complete emptying.

[0011] Optionally, the spiral angle of the coil is less than 30°.

[0012] By employing extremely dense winding, the contact area between the coil and the heat source base is maximized, and a longer cooling water flow path is provided. Combined with enhanced turbulence, this significantly improves heat exchange efficiency per unit area and overall performance. This represents the ultimate pursuit of heat dissipation performance. Dense winding provides more uniform and detailed heat dissipation coverage, reducing the risk of localized overheating.

[0013] Optionally, a protective cover is provided outside the base, and cooling water is provided between the protective cover and the base.

[0014] Adding a protective cover with a cooling water jacket to the outside of the machine base is a powerful and comprehensive design. Its main functions and advantages are: Significantly improved heat dissipation capacity: It provides a second heat dissipation channel (cooling water jacket), significantly increasing the heat dissipation area and the volume of the heat dissipation medium, working in conjunction with the internal coils to cope with extreme heat loads and ensure equipment thermal safety. Enhanced safety protection: It physically isolates rotating parts and high-temperature surfaces, preventing burns to personnel and accidental collisions with the equipment. Improved working environment: It reduces the surface temperature of the equipment, decreasing ambient heat radiation and noise. Provides sealing and protection: It can be used to maintain internal cleanliness or maintain an inert atmosphere.

[0015] Optionally, the bottom of the base is provided with a second cooling water inlet, the top of the base is provided with a cover, and the cover is provided with a second cooling water outlet.

[0016] The forced "bottom-in, top-out" flow pattern ensures the water jacket is fully filled, efficiently vents air, and achieves near-countercurrent heat exchange to maximize the average heat exchange temperature difference, thereby significantly improving the water jacket's heat dissipation efficiency. The coldest areas fully utilize gravity (water filling) and density differences (natural convection) to assist system operation and provide basic heat dissipation capacity in case of failure. Cooling water is directly used to cool the hottest bottom areas (bearings, motor ends, etc.), specifically addressing core thermal issues.

[0017] Optionally, the heat-conducting protrusion and the groove cover more than 70% of the outer area of ​​the coil.

[0018] By employing a large-area, high-proportion metal-to-metal forced contact, the effective heat conduction area is maximized. This large contact area disperses heat flow and provides redundancy and reliability under harsh operating conditions (vibration, centrifugal force, thermal cycling), maintaining long-term stable heat dissipation performance. A robust mechanical lock significantly reduces relative movement between contact surfaces, protecting the integrity of the heat conduction interface. This maximizes heat transfer within a compact space.

[0019] Optionally, the root of the heat-conducting protrusion extends with heat-conducting ribs.

[0020] Significantly reduces thermal resistance in the heat-conducting root region, eliminating key bottlenecks in the heat flow path. Strengthens the root to resist deformation and failure caused by centrifugal force, vibration, and thermal stress, ensuring long-term stable contact pressure and thermal conductivity.

[0021] Optionally, the heat-conducting ribs are uniformly distributed along the heat-conducting protrusions.

[0022] The system balances heat flow distribution, eliminates localized hot spots, maximizes thermal conductivity (including internal microfin heat transfer), and reduces temperature gradients. It also balances load-bearing stress, avoids stress concentration, provides all-around stiffness support, prevents non-uniform deformation, and ensures structural integrity under high-speed, vibration, and thermal cycling conditions.

[0023] Beneficial effects

[0024] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0025] This utility model's technical solution effectively solves the core problems mentioned in the background art, such as low heat dissipation efficiency, poor heat conduction, risk of emulsification, and limited space, by using water cooling instead of oil cooling (solving the risk of emulsification), employing a spirally wound flexible metal coil to directly and tightly fit the heat source (enhancing heat conduction), optimizing the contact interface with grooves and heat-conducting protrusions (further strengthening heat conduction), and equipping an external water tank and drive device to achieve forced water circulation (significantly improving heat dissipation efficiency). Attached Figure Description

[0026] Figure 1 An overall cross-sectional view of an atomizer heat dissipation mechanism proposed for an embodiment of this utility model;

[0027] Figure 2 A partial cross-sectional view of the heat-conducting protrusion of an atomizer heat dissipation mechanism proposed in an embodiment of this utility model;

[0028] 1. Machine cover; 2. Spindle; 3. Machine base; 4. Protective cover; 5. Coil; 6. Oil tank; 7. Lubricating oil; 8. Distribution plate; 9. Atomizing plate; 10. First cooling water inlet; 11. First cooling water outlet; 12. Second cooling water inlet; 13. Second cooling water outlet; 14. Heat-conducting protrusion; 15. Heat-conducting rib; 16. Groove. Detailed Implementation

[0029] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0030] Example

[0031] Combined with appendix Figure 1-2A heat dissipation mechanism for an atomizer includes a base 3 and a coil 5 spirally wound around the base 3. The spiral winding maximizes the contact area between the coil 5 and the surface of the base 3, significantly improving heat exchange efficiency. The coil tightly covers key heat source areas of the base 3 (such as the motor stator housing and bearing housing), ensuring effective heat capture. The coil 5 is connected to an external water tank, which houses a drive unit connected to the coil 5. The coil 5 provides a flow channel for cooling water, carrying away the absorbed heat. The continuously flowing cold water continuously carries away the heat absorbed by the coil 5, returning to the water tank for dissipation (or dissipating heat through the water tank's own cooling system, such as air cooling / auxiliary water cooling), forming a closed-loop cooling cycle.

[0032] A main shaft 2 is rotatably connected to the base 3 via bearings. The main shaft 2 is connected to an atomizing disc 9 via a connecting shaft. The surface of the base 3 has a groove 16 adapted to the coil 5. The coil 5 is fastened into the groove 16 by a heat-conducting protrusion 14. The shape of the groove 16 matches the coil 5, further increasing the heat-conducting contact surface. This ensures that the coil 5 fits tightly and stably on the optimal heat dissipation path preset on the surface of the base 3, preventing displacement due to vibration or gravity. Embedding the coil 5 in a slotted manner within the compact space of the base 3 is an effective means of efficiently utilizing space. A well-designed protruding structure can fill microscopic gaps, reduce contact thermal resistance, and significantly improve heat conduction efficiency.

[0033] The coil 5 is a flexible metal braided tube. The metal material itself has good thermal conductivity, ensuring that heat can be quickly transferred from the base 3 to the internal flowing water. In this embodiment, stainless steel is used as the material for the coil 5. The coil 5 is a multi-layered metal braided tube with an outer braided layer, which improves structural strength. It is easy to tightly and seamlessly wind into the complex contours and grooves 16 on the surface of the base 3, ensuring good contact. It can withstand slight vibrations and thermal expansion and contraction deformation during equipment operation and is not prone to cracking or leakage.

[0034] The cover 1 is fixedly connected to the base 3, such as by bolts. A vertically running main shaft 2 runs through the middle, with a motor connected to its top. The main shaft 2 is rotatably connected to both the cover 1 and the base 3 via bearings. A connecting shaft is connected to the lower end of the main shaft 2, and the lower end of the connecting shaft connects to the distribution disc 8 and the atomizing disc 9. An oil tank 6 is fixedly connected to the lower end of the base 3, containing lubricating oil 7 for lubricating and cooling the connecting shaft.

[0035] Coil 5 is connected to a first cooling water inlet 10 and a first cooling water outlet 11. The first cooling water inlet 10 is connected to the bottom of coil 5 via a pipe, and the first cooling water outlet 11 is connected to the top of coil 5 via a pipe. Cooling water enters from the bottom and, using gravity, can more effectively fill the entire coil 5 upwards, minimizing the possibility of air trapped inside the coil 5 (air resistance). A fully filled coil 5 provides the maximum effective heat dissipation area and heat exchange efficiency. The density of heated water decreases, causing it to rise naturally. Placing the outlet at the top aligns with the natural flow direction of hot water, allowing it to flow out of coil 5 smoothly with minimal resistance. Simultaneously, even if a small amount of air enters the system, it will accumulate at the highest point of coil 5 and be carried away by the water flow from the top outlet, effectively preventing air resistance. Air resistance can severely impede water flow, reduce heat dissipation efficiency, and even lead to localized overheating.

[0036] The helix angle of coil 5 is less than 30°. A small helix angle means that coil 5 has more turns along the same axial length of the base 3. This significantly increases the contact length and area between coil 5 and the surface of the base 3. More metal coil 5 directly contacts the heat source surface, providing more and denser heat conduction channels, allowing heat generated inside the base 3 to be transferred to the flowing cooling water more quickly and efficiently. Dense winding makes the distribution of cooling pipes more uniform and detailed in both axial and circumferential directions, enabling more precise "capture" of heat generated on the surface of the base 3 and reducing the formation of localized hot spots. The small helix angle winding results in a longer single-turn helix length and relatively frequent changes in helix direction (although the helix angle is small, the number of turns is large, resulting in a high total number of bends). This significantly increases the flow resistance and turbulence of the cooling water within coil 5. Turbulence effectively disrupts the laminar boundary layer near the pipe wall, greatly enhancing the convective heat transfer coefficient between the pipe wall and the cooling water, thereby significantly improving heat exchange efficiency. At the same cooling water flow rate, a longer total length of coil 5 means that the cooling water has a longer flow time in the heat source area, allowing more time to absorb heat (although the temperature rise may be higher, the total heat exchange may be greater, which needs to be considered in conjunction with the flow rate).

[0037] A protective cover 4 is provided outside the base 3, and cooling water is provided between the protective cover 4 and the base 3. A second cooling water inlet 12 is provided at the bottom of the base 3, and a cover 1 is provided at the top of the base 3, with a second cooling water outlet 13. In addition to the existing coil 5 heat dissipation (first heat dissipation channel), an extra heat dissipation path is added, enclosing the outer shell of the base 3. This significantly increases the total heat dissipation capacity. The space between the protective cover 4 and the base 3 is filled with cooling water, forming a "water jacket" or "cooling interlayer." The heat from the outer shell of the base 3 can be directly conducted to the cooling water in the interlayer and carried away by the water flow. This significantly increases the effective surface area available for heat dissipation (the entire outer surface of the base 3) and the volume of the heat dissipation medium (the water in the interlayer), especially effective for heat generated on the surface of the base 3 (such as heat conducted from bearing housings, heat from the motor stator housing, and some aerodynamic friction heat). When handling high-temperature molten metal or encountering extremely high speed conditions, the original coil 5 heat dissipation may approach its limit. Adding this external water-cooling jacket provides robust heat dissipation redundancy and capacity expansion, ensuring the equipment maintains a safe temperature even under extreme conditions. Cooling water enters from the lowest point (bottom of base 3), utilizing gravity to more effectively fill the entire annular cavity, minimizing the possibility of air trapped within the water jacket (air resistance). A fully filled cavity provides the maximum effective heat dissipation area.

[0038] The thermally conductive protrusions 14 and grooves 16 cover more than 70% of the outer area of ​​the coil 5. This directly and significantly reduces contact thermal resistance. The requirement of a coverage area >70% means that the design goal is to convert the vast majority (over 70%) of the nominal contact area between the coil 5 and the base 3 into an effective, low-thermal-resistance metal-to-metal contact area. This far exceeds the contact effect achievable with ordinary pipe clamps or simple placement, greatly increasing the heat flux density per unit contact area.

[0039] A heat-conducting rib 15 extends from the root of the heat-conducting protrusion 14. The heat-conducting rib 15 is evenly distributed along the heat-conducting protrusion 14. Heat is no longer conducted solely through the neck of the protrusion itself, but can be more evenly distributed through the heat-conducting rib 15, reducing the temperature gradient inside the protrusion body.

[0040] Working principle:

[0041] Motor copper / iron losses, aerodynamic friction heat from atomizing disc 9, and material conduction heat (>1000℃) are collected in the high thermal conductivity alloy base 3 through a three-stage heat conduction structure of main shaft 2-bearing-base 3. The main heat dissipation channel is captured by a spiral coil 5 (helix angle <30°) through a groove 16-protrusion structure (>70% coverage + heat-conducting rib 15 reinforcement) with low thermal resistance. The cooling water in the flexible metal braided tube forms a high-efficiency turbulent heat exchange through a counter-flow design of bottom inlet / top outlet (using gravity filling + thermal buoyancy discharge), carrying away >85% of the core heat. The auxiliary channel forms a water-cooled jacket through the outer protective cover 4 of base 3. The bottom secondary water inlet absorbs the surface residual heat and radiant heat, and the top discharge forms thermal redundancy. The dual cooling water finally merges into the external circulation system for heat dissipation, achieving a stable thermal balance with a temperature rise ≤40℃ under all operating conditions.

[0042] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A heat dissipation mechanism for an atomizer, characterized in that, The device includes a base and a coil spirally wound around the base. The coil is connected to an external water tank. A drive device is installed in the water tank and connected to the coil. A main shaft is rotatably connected between the bases via bearings. The main shaft is connected to an atomizing disc via a connecting shaft. The surface of the base has a groove adapted to the coil. The coil is fastened into the groove by a heat-conducting protrusion. The coil is a flexible metal braided tube.

2. The atomizer heat dissipation mechanism according to claim 1, characterized in that, The coil is connected to a first cooling water inlet and a first cooling water outlet. The first cooling water inlet is connected to the bottom of the coil via a pipe, and the first cooling water outlet is connected to the top of the coil via a pipe.

3. The atomizer heat dissipation mechanism according to claim 2, characterized in that, The spiral angle of the coil is less than 30°.

4. The atomizer heat dissipation mechanism according to claim 1, characterized in that, The base is provided with a protective cover, and cooling water is provided between the protective cover and the base.

5. The atomizer heat dissipation mechanism according to claim 4, characterized in that, The base has a second cooling water inlet at its bottom and a cover at its top, with a second cooling water outlet on the cover.

6. The atomizer heat dissipation mechanism according to claim 1, characterized in that, The heat-conducting protrusion and the groove cover more than 70% of the outer area of ​​the coil.

7. A heat dissipation mechanism for an atomizer according to claim 1 or 6, characterized in that, The root of the heat-conducting protrusion extends with heat-conducting ribs.

8. The atomizer heat dissipation mechanism according to claim 7, characterized in that, The heat-conducting ribs are evenly distributed along the heat-conducting protrusions.

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