Double-impeller vortex high-pressure fan

Abstract

The utility model discloses a double -vane vortex high pressure fan belongs to fan technical field. It solved the existing high pressure fan air output to be difficult according to the working condition to carry out fast, accurate closed -loop control etc. problems. The fan includes the pump shell and the motor shell, is equipped with the intercommunication first -stage compression chamber and second -stage compression chamber in the pump shell, is equipped with first -stage impeller in the first -stage compression chamber, is equipped with second -stage impeller in the second -stage compression chamber, the first -stage compression chamber is connected with the air inlet pipe, and the second -stage compression chamber is connected with the air outlet pipe, and the motor shell is fixed with frequency converter, and the frequency converter and the pump shell have the passageway gap, and the air outlet pipe is fixedly connected with pressure sensor, and the frequency converter includes the controller, and the pressure sensor is electrically connected with the controller. The utility model through pressure sensor and frequency converter constitute closed -loop control system, realize the accurate, continuous regulation of air output, utilize the passageway gap to insulate heat simultaneously, and form the chimney effect through the heat dissipation structure, enhance the heat dissipation efficiency, improve the operation reliability.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, specifically referring to a double-impeller vortex high-pressure fan. Background Technology

[0002] Vortex high-pressure blowers, also known as high-pressure blowers, are highly efficient air supply devices. They use centrifugal force to accelerate gas through a rotating impeller, generating a powerful high-pressure airflow with pressures 12-17 times that of a centrifugal blower at the same rotation speed. They also function as both blowers and suction systems, and offer advantages such as oil-free operation, clean output air, and low operating noise. For these reasons, they are widely used in numerous industrial fields, including wastewater treatment, food packaging, textile machinery, plastics and chemicals, and electrical and electronic engineering, providing stable pneumatic support for various processes.

[0003] In existing technologies, such as the Chinese invention patent CN106930983B entitled "A High-Pressure Air Ring Fan and a Multi-Stage Air Pressure Boosting Method," the use of multi-stage compression chambers and independent heat dissipation structures effectively improves the fan's outlet pressure and high-temperature resistance. However, this solution still has room for optimization: First, the airflow of its outlet duct is still difficult to control quickly and accurately in a closed-loop manner according to complex and changing actual working conditions; second, in this structure, key control components such as the drive motor and frequency converter are usually located near the high-temperature compression chamber, and are susceptible to the effects of accumulated heat in the compression chamber during long-term operation, reducing the reliability and service life of the components.

[0004] Therefore, it is necessary to further optimize the structural design of existing high-pressure fans, especially multi-stage booster fans, based on existing technological achievements, in order to improve the intelligence and flexibility of air outlet control, as well as the overall heat dissipation efficiency and operational reliability of the system. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fan with adjustable air volume.

[0006] The objective of this utility model can be achieved through the following technical solution: A double-impeller vortex high-pressure blower includes a pump casing and a motor casing fixedly connected to each other. The pump casing has a primary compression chamber and a secondary compression chamber that are interconnected. A primary impeller is arranged in the primary compression chamber, and a secondary impeller is arranged in the secondary compression chamber. An air inlet pipe is connected to the primary compression chamber, and an air outlet pipe is connected to the secondary compression chamber. A frequency converter is fixedly installed on the motor casing. There is a passage gap between the frequency converter and the pump casing. A pressure sensor is fixedly connected to the air outlet pipe. The frequency converter includes a frequency converter housing and a controller fixedly installed in the frequency converter housing. The pressure sensor is electrically connected to the controller.

[0007] Furthermore, the motor housing includes a front cover, a middle cylinder, and a rear cover that are fixedly connected in sequence. The front cover and the pump housing are directly fixed by fasteners. The middle cylinder has several heat dissipation fins protruding outward from its outer periphery. At least two fixing posts protruding outward from the outer periphery of the middle cylinder along the direction of the heat dissipation fins. The axial end of the fixing post relative to the motor housing is fixedly connected to the rear cover, and the radial end of the fixing post relative to the motor housing is fixedly connected to the inverter housing.

[0008] Furthermore, the lower end of the inverter housing is fixedly formed with a fixed bottom wall, and the lower end of the fixed bottom wall protrudes with several heat dissipation strips facing the motor housing. The heat dissipation strips abut against the fixed posts, and there are heat dissipation fins between the two fixed posts. The heat dissipation channel one between the heat dissipation strips is connected to the heat dissipation channel two between the heat dissipation fins.

[0009] Furthermore, the central cylinder is fixedly connected to a ventilation hood, which is fitted around the outer periphery of the heat dissipation fins.

[0010] Furthermore, the ventilation hood extends upward and protrudes to form a flow guide shroud, the upper wall of which is positioned opposite to the fixed bottom wall, and the flow guide shroud covers the heat dissipation strips.

[0011] Furthermore, the rear cover is located inside the ventilation hood, and there is a flow-guiding arc surface between the ventilation hood and the flow guide hood.

[0012] Furthermore, the rear cover is provided with a flow guide groove.

[0013] Furthermore, the motor housing contains a stator, a rotor, and a shaft. The shaft extends through the rear cover and is fixedly connected to a fan impeller, which is located inside a ventilation hood.

[0014] Compared with existing technologies, the technical advantages of this utility model are as follows: 1. By installing a pressure sensor on the air outlet duct and electrically connecting it to the inverter controller, a closed-loop feedback system is constructed. This system can monitor the output air pressure in real time and automatically and quickly adjust the motor speed through the inverter according to set parameters or external commands, thereby achieving precise, continuous, and flexible adjustment of the air volume to adapt to complex and changing working conditions. 2. By setting a passage gap between the inverter and the high-temperature pump casing, the direct conduction of heat from the compression chamber is effectively isolated, providing a relatively low-temperature working environment for key control components such as the inverter. 3. The heat dissipation channel one between the heat sink bars and the heat dissipation channel two between the heat sink fins are interconnected, forming a highly efficient chimney-effect heat dissipation airflow. The rotation of the impeller drives natural air convection to accelerate heat dissipation, enhancing the cooling effect on the motor and inverter. Attached Figure Description

[0015] Figure 1 This is a perspective view of the utility model.

[0016] Figure 2 This is a perspective view of the present invention after the air deflector has been removed.

[0017] Figure 3 This is a cross-sectional view of the present invention.

[0018] Figure 4 This is a side view of the present invention.

[0019] Figure 5 This is a schematic diagram of the motor housing of this utility model.

[0020] Drawing number markings: 1. Pump casing; 11. Primary compression chamber; 12. Secondary compression chamber; 13. Primary impeller; 14. Secondary impeller; 15. Inlet pipe; 16. Outlet pipe; 2. Motor casing; 21. Front cover; 22. Intermediate cylinder; 221. Heat dissipation fins; 222. Fixing column; 223. Heat dissipation channel two; 23. Rear cover; 231. Guide groove; 24. Shaft; 25. Rotor; 26. Stator; 3. Pressure sensor; 4. Frequency converter; 41. Frequency converter housing; 42. Fixed bottom wall; 43. Heat dissipation strip; 44. Heat dissipation channel one; 45. Controller; 5. Passage clearance; 6. Ventilation hood; 61. Guide hood; 62. Guide arc surface; 7. Fan impeller; 8. Fixing component. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] according to Figures 1 to 5As shown, this utility model provides a dual-impeller vortex high-pressure blower, the core of which lies in achieving intelligent adjustment of airflow and efficient heat dissipation of the system. The high-pressure blower mainly includes a pump housing 1 and a motor housing 2, which are fixedly connected to each other by bolts and other fasteners 8 to form a compact integrated structure. The pump housing 1 has two series-connected compression chambers, a primary compression chamber 11 and a secondary compression chamber 12, which are interconnected by flow channels. The primary compression chamber 11 is equipped with a primary impeller 13, and the secondary compression chamber 12 is equipped with a secondary impeller 14. Gas enters from the inlet pipe 15 connected to the primary compression chamber 11, is initially pressurized by the primary impeller 13, enters the secondary compression chamber 12 and is further pressurized by the secondary impeller 14, and finally is discharged at high speed and high pressure from the outlet pipe 16 connected to the secondary compression chamber 12, thus forming a dual-stage pressurization effect.

[0024] To achieve precise airflow control, a pressure sensor 3 is fixedly installed on the outlet duct 16. Simultaneously, a frequency converter 4 is fixedly mounted on the motor housing 2. The frequency converter 4 maintains a certain physical distance from the pump housing 1, forming a passageway gap 5. This passageway gap 5 acts as a heat insulation buffer, effectively preventing direct heat radiation and conduction from the high temperature generated inside the pump housing 1 due to gas compression to the frequency converter 4. This provides the frequency converter 4 with a relatively low-temperature and stable operating environment, significantly improving its long-term reliability and service life.

[0025] The frequency converter 4 contains a controller 45, which is electrically connected to the pressure sensor 3 via wires. Thus, the pressure sensor 3 monitors the gas pressure signal within the outlet duct 16 in real time and feeds it back to the controller 45. The controller 45 compares the feedback value with a preset pressure target value or received external commands, and then outputs a control signal to dynamically adjust the output frequency of the frequency converter 4, thereby changing the speed of the drive motor. The change in motor speed directly causes a synchronous change in the speed of the first-stage impeller 13 and the second-stage impeller 14, ultimately achieving rapid, continuous, and precise closed-loop control of the airflow to adapt to different operating conditions.

[0026] In terms of heat dissipation optimization, the motor housing 2 adopts a modular design, including a front cover 21, a middle cylinder 22, and a rear cover 23 that are fixedly connected in sequence. The front cover 21 is directly connected to the pump housing 1 via a fastener 8. Several heat dissipation fins 221 protrude outwards from the outer peripheral wall of the middle cylinder 22, forming four groups on the outer peripheral wall of the middle cylinder 22 in a vertical and horizontal arrangement. These heat dissipation fins 221 greatly increase the heat dissipation surface area of ​​the motor housing 2. To provide stable support and optimize the heat dissipation path, at least two fixing posts 222 are integrally protruding from the outer periphery of the middle cylinder 22. The end faces of these fixing posts 222 relative to the axial end of the motor housing are fixedly connected to the rear cover 23 with screws, while the sides of the fixing posts 222 relative to the radial end of the motor housing are used to fix and install the inverter housing 41 of the inverter 4.

[0027] Furthermore, a fixed bottom wall 42 is integrally formed at the lower end of the inverter housing 41. The controller 45 is fixedly mounted on the fixed bottom wall 42, and the lower surface of the fixed bottom wall 42 (the side facing the motor housing 2) has several parallel heat dissipation slats 43 protruding downwards. During installation, the ends of these heat dissipation slats 43 abut tightly against the fixed post 222 below. The gaps between the heat dissipation slats 43 form a heat dissipation channel 1 44, while the gaps between adjacent heat dissipation fins 221 form a heat dissipation channel 223. The heat dissipation channel 223 is also provided with guide ribs. Importantly, the heat dissipation channel 1 44 and the heat dissipation channel 223 are spatially interconnected, together forming a continuous vertical heat dissipation duct with a chimney effect.

[0028] To guide airflow and enhance heat dissipation, a ventilation shroud 6 is fixedly installed at the rear end of the central cylinder 22. This shroud 6 surrounds all the heat dissipation fins 221. The upper part of the ventilation shroud 6 extends upwards and protrudes to form a guide shroud 61, the upper surface of which is opposite to the fixed bottom wall 42 of the inverter 4. The guide shroud 61 is cleverly designed to cover the area of ​​the lower heat dissipation strips 43, allowing airflow to be directed more concentratedly through the heat dissipation channel 44. At the transition between the ventilation shroud 6 and the guide shroud 61, a smooth guiding arc surface 62 is used to reduce airflow resistance. Furthermore, an inclined slope is formed on the end face of the rear cover 23, and a guide groove 231 is formed on this inclined slope to assist in airflow organization.

[0029] Inside the motor housing 2, a stator 26, a rotor 25, and a shaft 24 passing through them are arranged. The rear end of the shaft 24 protrudes from the rear cover 23, and a fan impeller 7 is fixedly installed at its end. The fan impeller 7 is located within the space enclosed by the ventilation shroud 6. When the fan is running, the fan impeller 7 rotates synchronously with the shaft 24, generating a strong axial suction force, which forces external cool air to enter from the rear or side of the ventilation shroud 6, flow sequentially through the guide groove 231 and the heat dissipation channel 223 between the heat dissipation fins 221, and then flow upwards into the heat dissipation channel 44 between the heat dissipation bars 43 before being discharged. This process forms a forced convection cooling airflow from bottom to top, which efficiently removes the heat generated by the motor during operation and the heat generated by the frequency converter 4, significantly improving the heat dissipation efficiency of the entire system.

[0030] In summary, this invention achieves intelligent and precise airflow adjustment by integrating pressure sensing and frequency conversion control. At the same time, through a unique structural layout and air duct design, it achieves effective thermal isolation and efficient heat dissipation for key components, thereby comprehensively improving the performance, adaptability, and reliability of the high-pressure blower.

[0031] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A double-impeller vortex high-pressure blower, comprising a pump housing (1) and a motor housing (2) fixedly connected to each other, wherein the pump housing (1) has a primary compression chamber (11) and a secondary compression chamber (12) that are interconnected, wherein a primary impeller (13) is disposed in the primary compression chamber (11) and a secondary impeller (14) is disposed in the secondary compression chamber (12), wherein an air inlet pipe (15) is connected to the primary compression chamber (11) and an air outlet pipe (16) is connected to the secondary compression chamber (12), characterized in that: A frequency converter (4) is fixedly installed on the motor housing (2). There is a passage gap (5) between the frequency converter (4) and the pump housing (1). A pressure sensor (3) is fixedly connected to the air outlet pipe (16). The frequency converter (4) includes a frequency converter housing (41) and a controller (45) fixedly installed inside the frequency converter housing (41). The pressure sensor (3) is electrically connected to the controller (45).

2. The double-impeller vortex high-pressure blower according to claim 1, characterized in that: The motor housing (2) includes a front cover (21), a middle cylinder (22) and a rear cover (23) that are fixedly connected in sequence. The front cover (21) and the pump housing (1) are directly fixed by a fastener (8). The outer periphery of the middle cylinder (22) is provided with a plurality of heat dissipation fins (221) protruding outward. The outer periphery of the middle cylinder (22) is provided with at least two fixing posts (222) protruding along the direction of the heat dissipation fins (221). The axial end of the fixing post (222) relative to the motor housing (2) is fixedly connected to the rear cover (23), and the radial end of the fixing post (222) relative to the motor housing (2) is fixedly connected to the inverter housing (41).

3. A double-impeller vortex high-pressure blower according to claim 2, characterized in that: The lower end of the variable frequency housing (41) is fixedly formed with a fixed bottom wall (42). The lower end of the fixed bottom wall (42) protrudes from the direction of the motor housing (2) with a plurality of heat dissipation strips (43). The heat dissipation strips (43) abut against the fixed posts (222). There are heat dissipation fins (221) between the two fixed posts (222). The heat dissipation channel one (44) between the heat dissipation strips (43) is connected to the heat dissipation channel two (223) between the heat dissipation fins (221).

4. A double-impeller vortex high-pressure blower according to claim 3, characterized in that: The middle cylinder (22) is fixedly connected to a ventilation hood (6), which is fitted around the outer periphery of the heat dissipation fins (221).

5. A double-impeller vortex high-pressure blower according to claim 4, characterized in that: The ventilation hood (6) extends upward and protrudes to form a flow guide hood (61). The upper end wall of the flow guide hood (61) is arranged opposite to the fixed bottom wall (42). The flow guide hood (61) covers the heat dissipation strip (43).

6. A double-impeller vortex high-pressure blower according to claim 5, characterized in that: The rear cover (23) is located inside the ventilation hood (6), and there is a flow guiding arc surface (62) between the ventilation hood (6) and the flow guide hood (61).

7. A double-impeller vortex high-pressure blower according to claim 6, characterized in that: The rear cover (23) is provided with a flow guide groove (231).

8. A double-impeller vortex high-pressure blower according to any one of claims 2 to 7, characterized in that: The motor housing (2) contains a stator (26), a rotor (25) and a shaft (24). The shaft (24) passes through the rear cover (23) and is fixedly connected to the impeller (7). The impeller (7) is located inside the ventilation hood (6).

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