Totally-closed atomizer

Abstract

The utility model discloses a totally-closed atomizer, which relates to the technical field of high-speed atomizers and comprises a hollow main shaft with a hollow cavity in the center, a rotary joint is arranged at one end of the hollow main shaft, and one side, close to the rotary joint end, of the hollow main shaft is connected to a driving motor and is driven by the driving motor. One end of the hollow main shaft is fixedly connected with a rotary joint, the other end of the hollow main shaft is fixedly connected with an atomizing disc, the hollow main shaft is communicated with the atomizing disc through a discharging hole, the hollow cavity is a closed cavity except the rotary joint and the discharging hole, and the hollow main shaft is made of a heat conduction material. The technical problem to be solved by the utility model is to provide the totally-closed atomizer which is used for feeding in a closed manner and completely eradicating overflow: ensuring stable operation under high flow; high-pressure feeding is achieved, the yield is increased, the pressure limitation of an open system is broken through, and higher productivity is achieved; feed liquid is cooled, equipment is protected, and key heating parts are effectively cooled through working media.

Description

Technical Field

[0001] This utility model relates to the field of high-speed atomizer technology, specifically to a fully enclosed atomizer. Background Technology

[0002] High-speed atomizers are technical devices used to rapidly disperse liquids into tiny droplets, widely applied in various fields. However, their open-feed structure limits their effectiveness. Atomizers are crucial components in precision instruments. They utilize compressed air passing through a narrow nozzle to create a high-speed airflow. The resulting negative pressure propels the liquid or other fluids against an obstacle. Under high-speed impact, the droplets splash outwards, transforming into a mist of particles that exit from the nozzle orifice. Research indicates that the stability and uniformity of the atomized particles are closely related to the nozzle orifice size, the number of holes drilled, and the drilling angle. In traditional structures, the liquid is directly exposed to or above the atomizing disc via external pipes or nozzles (e.g., overflow channels, spray guns). During sudden increases in flow, the liquid easily overflows from the edge of the atomizing disc or the feed inlet, leading to material waste and contamination. Limited feed pressure (to avoid splashing / film breakage) restricts atomization efficiency. The high-speed operation of the motor and spindle generates heat, but there is no active cooling channel. Heat accumulation causes bearing temperature rise, reducing lifespan; high temperatures may affect the physical properties of heat-sensitive liquids (e.g., protein denaturation, viscosity changes). Low feed pressure limits the throughput per unit time, making it difficult to meet high-capacity demands and resulting in poor economic efficiency for large-scale production. 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 a fully enclosed atomizer with closed feeding to prevent overflow, ensuring stable operation even at high flow rates; high-pressure feeding to increase output, breaking through the pressure limitations of open systems to achieve greater production capacity; and liquid cooling to protect the equipment, effectively cooling key heat-generating components using the working medium itself.

[0005] Technical solution

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

[0007] A fully enclosed atomizer includes a hollow main shaft with a central hollow cavity. One end of the hollow main shaft is provided with a rotary joint. The side of the hollow main shaft near the rotary joint is connected to and driven by the drive motor. The other end of the hollow main shaft is fixedly connected to an atomizing disk. The hollow main shaft and the atomizing disk are connected through a discharge hole. The hollow cavity is a closed cavity except for the rotary joint and the discharge hole. The hollow main shaft is made of a heat-conducting material.

[0008] The hollow cavity is a closed flow channel designed to prevent overflow. Even with a sudden increase in flow rate (such as pulse feeding), the liquid is forcibly confined within the metal pipe, physically preventing overflow from the edge of the atomizing disc. High-pressure feeding increases capacity; the feed pressure can be increased, thus increasing the throughput per unit time. Active cooling of the liquid removes heat transferred from the motor to the spindle, protecting heat-sensitive liquids from high-temperature degradation. The closed cavity, accessible only by the rotary joint and discharge port, physically isolates the system from the external environment, preventing contamination, maintaining the system's pressure integrity, and ensuring the cleanliness and pressure stability of the liquid.

[0009] Optionally, the rotary joint includes a stationary end and a moving end that are rotatably connected, the stationary end being connected to the feeding mechanism, and the moving end being rotatable.

[0010] The stationary end is fixedly connected to the feed pipe, while the moving end rotates with the spindle. A dynamic seal for the high-pressure fluid is required between the two. The rotary joint is the only interface connecting the outside to the closed cavity, and its sealing reliability directly determines the overflow prevention effect. The stationary-moving conversion module achieves the "final link" connection of the closed flow channel, providing a dynamic sealing foundation for the three major functions of high pressure, overflow prevention, and cooling.

[0011] Optionally, the stationary end is provided with a liquid inlet.

[0012] The inlet directly receives the output of the feed pump, ensuring that the atomizing disc obtains effective working pressure.

[0013] Optionally, the edge of the liquid inlet is provided with an annular protrusion for sealing connection.

[0014] The annular convex structure integrates three functions: a sealing barrier for pressure resistance and leak prevention; a thermal bridge channel for heat dissipation; and vibration damping for absorbing pipeline vibration. The feed inlet is upgraded from a "passive connection point" to an active safety node, providing a fundamental guarantee for the three core advantages of the closed atomizer (high pressure / overflow prevention / cooling).

[0015] Optionally, a protruding limiting structure is provided between the stationary end and the moving end, and a bearing is provided on the outer side of the protruding limiting structure.

[0016] The raised limiting structure between the stationary and moving ends, with a bearing mounted on its outer side, constitutes a crucial positioning and support component in the rotary joint. This structure achieves axial positioning and anti-misalignment protection between the stationary and moving ends through the raised limiting structure, ensuring stable alignment during high-speed rotation and preventing seal failure caused by misalignment or vibration. Simultaneously, the outer bearing provides low-friction rotary support for the moving end, ensuring smooth operation of the spindle under high-pressure feeding conditions and improving the overall mechanical stability and sealing reliability of the rotary joint. This design not only enhances the system's vibration resistance but also extends the service life of the rotary joint.

[0017] Optionally, the atomizing disc has a conical hole in the center, which is axially limited to the conical end of the hollow main shaft, and the conical end of the hollow main shaft is tightened with a locking screw.

[0018] The tapered hole in the center of the atomizing disc forms an axial limiting connection with the tapered end of the hollow main shaft. This structure achieves high-precision centering and positioning through tapered surface mating, ensuring good dynamic balance and stable operation of the atomizing disc during high-speed rotation. Simultaneously, a locking screw is tightened at the tapered end of the hollow main shaft, further enhancing the connection's robustness and anti-loosening performance, preventing the risk of loosening due to vibration or centrifugal force. This design not only improves the reliability of the mechanical connection between the atomizing disc and the main shaft but also ensures the sealing integrity of the enclosed cavity under high-pressure, high-speed conditions.

[0019] Optionally, a heat-conducting ring is provided on the outside of the hollow spindle.

[0020] The heat-conducting ring plate on the outside of the hollow spindle is a key structure for enhancing heat dissipation. By increasing the heat dissipation area of ​​the spindle surface, it accelerates the dissipation of heat conducted to the spindle during motor operation and high-speed rotation, thereby achieving active temperature control of the spindle and the internal liquid. This structure, in synergy with the thermally conductive material properties of the spindle, further improves overall cooling efficiency.

[0021] Optionally, the heat-conducting ring has a streamlined circumferential structure.

[0022] The heat-conducting ring is designed with a streamlined circumferential structure, which not only achieves efficient heat dissipation but also significantly optimizes its aerodynamic performance, reducing resistance and disturbance between the ring and the surrounding airflow during high-speed rotation, thereby reducing energy consumption and operating noise. This structure not only maintains the heat dissipation capacity of the heat-conducting ring but also improves the overall stability and energy efficiency of the atomizer, making it particularly suitable for continuous operation under high-speed conditions.

[0023] Beneficial effects

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

[0025] The technical solution provided by this utility model adopts a hollow spindle structure with a central closed hollow cavity isolated from the outside for conveying liquid feed. External feeding is achieved only through a rotary joint, and feeding is also achieved through a discharge port to the atomizing disc. This effectively prevents the liquid feed from overflowing under high pressure or pulse feeding, ensuring the system's sealing and operational safety. The hollow spindle is made of thermally conductive material and is connected to a drive motor to rotate at high speed, enabling the atomizing disc to efficiently atomize the liquid feed. This structure not only improves the processing capacity per unit time but also achieves active cooling of the liquid feed through the thermal conductivity of the spindle, protecting heat-sensitive materials from high temperatures. It embodies the three core functions of "high-pressure feeding, overflow prevention control, and active cooling," and is suitable for spray applications requiring high cleanliness and high stability. Attached Figure Description

[0026] Figure 1 A cross-sectional view of a fully enclosed atomizer proposed for an embodiment of this utility model;

[0027] Figure 2 A partial cross-sectional view of a fully enclosed atomizer proposed for an embodiment of this utility model;

[0028] Figure 3 A partial cross-sectional view of the end of the hollow main shaft of a fully enclosed atomizer proposed for an embodiment of this utility model;

[0029] Figure 4 A partial cross-sectional view of a rotary joint of a fully enclosed atomizer proposed for an embodiment of this utility model;

[0030] 1. Rotary joint; 101. Stationary end; 102. Moving end; 103. Bearing; 104. Raised limiting structure; 2. Liquid inlet; 3. Drive motor; 4. Motor base; 5. Coupling sleeve; 6. Hollow spindle; 601. Hollow cavity; 602. Heat-conducting ring; 603. Discharge hole; 604. Tapered limiting structure; 605. Locking screw; 7. Atomizing disc; 701. Atomizing hole; 702. Volumetric cavity. Detailed Implementation

[0031] 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.

[0032] Example 1

[0033] Combined with appendix Figure 1A fully enclosed atomizer includes a hollow main shaft 6 with a central hollow cavity 601. One end of the hollow main shaft 6 has a rotary joint 1. The side of the hollow main shaft 6 near the rotary joint 1 is connected to and driven by a drive motor 3. The other end of the hollow main shaft 6 is fixedly connected to an atomizing disk 7. The hollow main shaft 6 and the atomizing disk 7 are connected through a discharge port 603. The hollow cavity 601 is a closed cavity except for the rotary joint 1 and the discharge port 603. The hollow main shaft 6 is made of a heat-conducting material. The liquid feed is completely sealed from the rotary joint 1 to the hollow cavity 601, to the discharge port 603, and to the atomizing disk 7, eliminating any exposure points. The rotary joint 1 provides a dynamic seal, and the hollow main shaft 6 has a pressure-bearing cavity design optimized through wall thickness and material strength. The feed pressure can be increased from the traditional 0.2 MPa to over 0.5 MPa, and the throughput per unit time can be increased by more than 150%. When the liquid flows at high speed through the heat-conducting hollow main shaft 6, the liquid continuously exchanges heat with the inner wall of the main shaft. This removes the heat transferred from the motor to the main shaft, resulting in a measured temperature drop of 15-20℃. This protects heat-sensitive liquids, such as proteins, from high-temperature denaturation. The discharge port 603 is located at the tapered connection between the main shaft and the atomizing disk 7, directly guiding the liquid into the center of the atomizing disk 7's volumetric cavity 702. The liquid diffuses evenly in the centrifugal force field, avoiding jet deviation in open structures and improving atomization uniformity.

[0034] Combined with appendix Figure 2 A heat-conducting ring plate 602 is provided on the outside of the hollow main shaft 6. The heat-conducting ring plate 602 has a streamlined circumferential structure. In this embodiment, the heat-conducting ring plate 602 is provided on the outside of the hollow main shaft 6. The heat-conducting ring plate 602 is arranged along the axial direction of the main shaft to enhance the overall heat conduction capacity of the main shaft. By increasing the heat dissipation area, the heat generated during the operation and rotation of the motor is quickly dissipated, thereby achieving effective control of the main shaft temperature. The circumferential design of the heat-conducting ring plate 602 is streamlined, which, while ensuring good heat dissipation performance, reduces the resistance and disturbance between the ring plate and the surrounding air during high-speed rotation, reduces energy loss and operating noise, and improves the stability and energy efficiency of the equipment operation. This structure, together with the hollow main shaft 6 made of heat-conducting material, achieves stable thermal control of the atomizer under high-pressure feeding and continuous operation conditions, ensuring the quality stability of heat-sensitive materials during the conveying and atomization process.

[0035] Combined with appendix Figure 3 The atomizing disk 7 has a conical hole in the center, which is axially connected to the conical end of the hollow main shaft 6. A locking screw 605 is tightened at the conical end of the hollow main shaft 6. During assembly, the conical end (taper 1:5) of the hollow main shaft 6 is inserted into the central conical hole of the atomizing disk 7 to achieve axial positioning; the M12×1.5 locking screw 605 (strength grade 12.9) is screwed in to a torque of 30 N·m, generating a contact stress ≥120 MPa on the conical surface. Helium mass spectrometry analysis shows that the leakage rate of the assembly at 0.8 MPa pressure is <5×10⁻⁻⁻⁶. 6The dynamic balance vibration value at 3000 rpm is ≤2.5 mm / s. During disassembly, heating the atomizing disc to 7 to 180℃ (thermal expansion gap 0.04 mm) will separate the conical surface fit.

[0036] Combined with appendix Figure 4 The rotary joint 1 includes a stationary end 101 and a moving end 102 that are rotatably connected. The stationary end 101 is connected to the feeding mechanism, and the moving end 102 is rotatable. The stationary end 101 is provided with a liquid inlet 2. The edge of the liquid inlet 2 is provided with an annular protrusion for sealing connection. Radial sealing: the annular protrusion compresses the sealing ring (not shown in the figure) radially and expands to fit against the inner wall of the inlet flange; axial sealing: the step of the annular protrusion and the end face of the sealing ring form an end face compression. The stationary feeding mechanism needs to continuously feed the high-speed rotating hollow spindle 6. The stationary end 101 and the moving end 102 adopt a precision bearing 103 with a double-end mechanical seal; the high-pressure liquid at the stationary end 101 → passes through the sealing interface → enters the cavity of the rotating moving end 102 → inputs into the hollow spindle 6, realizing zero-leakage transmission at a speed of 2000-30000 rpm (pressure resistance ≥0.8MPa). A heat-insulating bushing is installed between the stationary end 101 and the feeding mechanism to prevent reverse heat conduction from the motor; the moving end 102 and the main shaft are connected by a flexible coupling to compensate for axial and radial vibration deviations and prevent high temperature / vibration from being transmitted to the feeding system, ensuring flow stability. The stationary end 101 and the moving end 102 adopt a snap-fit ​​modular design, allowing for seal replacement without disassembling the entire machine, reducing downtime losses due to seal failure, with a replacement time of ≤15 minutes. The inlet directly receives the output of the feeding pump, and its smooth flow path (Ra≤0.8μm) and dead-angle-free design reduce pressure loss, ensuring that the atomizing disc 7 obtains effective working pressure.

[0037] A raised limiting structure 104 is provided between the stationary end 101 and the moving end 102, and a bearing 103 is provided on the outer side of the raised limiting structure 104. The height of the protrusion is 3.2±0.05mm, which limits the axial movement of the moving end 102 to ≤0.1mm; the cone angle is 15°, which guides the assembly of the bearing 103 and compensates for thermal expansion; the surface hardness is HRC 58-62 (nitriding treatment) to resist fretting wear; the root radius is R0.3mm, which can eliminate stress concentration.

[0038] 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 totally enclosed atomizer characterized by, The device includes a hollow spindle with a central cavity. One end of the hollow spindle is equipped with a rotary joint. The side of the hollow spindle near the rotary joint is connected to and driven by a drive motor. The other end of the hollow spindle is fixedly connected to an atomizing disc. The hollow spindle and the atomizing disc are connected through a discharge hole. The hollow cavity is a closed cavity except for the rotary joint and the discharge hole. The hollow spindle is made of a heat-conducting material.

2. A totally enclosed atomizer according to claim 1, wherein The rotary joint includes a stationary end and a moving end that are rotatably connected. The stationary end is connected to the feeding mechanism, and the moving end is rotatable.

3. A totally enclosed atomizer according to claim 2, wherein The stationary end is equipped with a liquid inlet.

4. A totally enclosed atomizer according to claim 3, wherein The edge of the liquid inlet is provided with an annular protrusion for sealing connection.

5. A totally enclosed atomizer according to claim 2, wherein A protruding limiting structure is provided between the stationary end and the moving end, and a bearing is provided on the outer side of the protruding limiting structure.

6. A totally enclosed atomizer according to claim 1, wherein The atomizing disc has a conical hole in the center, which is axially limited to the conical end of the hollow main shaft, and the conical end of the hollow main shaft is tightened with a locking screw.

7. A totally enclosed atomizer according to claim 1, wherein The hollow main shaft is equipped with a heat-conducting ring plate.

8. A totally enclosed atomizer according to claim 7, wherein The heat-conducting ring has a streamlined circumferential structure.

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