Air-suspended centrifugal fan

Abstract

The utility model relates to air suspension centrifugal fan technical field, and disclose an air suspension centrifugal fan, including the organism, the organism's inside surface is provided with the pivot, the pivot's one end outer surface fixed mounting has the main impeller, the pivot's other end outer surface fixed mounting has the auxiliary impeller, the organism's outer surface is provided with the volute, the organism's outer surface cladding fixedly has the cooling shell, the cooling shell's inside surface fixedly connected with spiral blade, the cooling shell's lower surface fixedly connected with the water inlet pipe mouth and the water outlet pipe mouth, the pivot's inside surface is provided with first extruding piece and second extruding piece, through built -in telescopic first extruding piece and second extruding piece structure, can pass through the thread pin rotation, can drive conical extrusion convex head expansion first extruding piece and second extruding piece, its expandable extrusion main impeller and auxiliary impeller locking, its firm, convenient to assemble and disassemble, can be convenient for the rotor cooling, convenient cooling.

Description

Technical Field

[0001] This utility model relates to the field of air-suspended centrifugal fan technology, specifically an air-suspended centrifugal fan. Background Technology

[0002] Air suspension bearing technology is based on Bernoulli's principle. When the rotor rotates at high speed, the relative motion between the rotor and the bearing generates a pressure difference, thereby producing a certain buoyancy force to support the radial load, allowing the rotor to run at high speed in a suspended state. Similarly, when the rotor is running, the thrust generated by the thrust bearing can keep it running at high speed without physical contact. There are already various assembly methods for rotor components in rotating machinery, which have high requirements for the matching of the transmission group. Current magnetic levitation blowers mostly use the preload between the first drive shaft and the locking nut to transmit torque to make the impeller rotate at high speed. The locking nut is easy to be damaged, and the assembly process is very easy to damage the motor magnetic bearing, which reduces the reliability of the whole machine or even scraps the motor. In the prior art, such as the invention disclosed in authorization announcement number CN113124000A, a method for assembling a magnetic levitation blower impeller is provided. The magnetic levitation blower impeller includes a three-dimensional flow controllable vortex impeller, a transmission connecting stud, a first transmission shaft, connecting screws, and a flow guide cap. The assembly method of the magnetic levitation blower impeller includes: placing the three-dimensional flow controllable vortex impeller on an assembly fixture, assembling the transmission connecting stud onto the three-dimensional flow controllable vortex impeller, then installing the first transmission shaft onto the transmission connecting stud, and finally locking the flow guide cap to the first transmission shaft and the three-dimensional flow controllable vortex impeller respectively through the connecting screws. The aforementioned patent uses multiple screws to fix the impeller, which is complicated to fix and inconvenient to install and remove. The screws need to be installed individually and removed first, which is inconvenient to operate. Furthermore, the rotor has difficulty in heat dissipation under high-speed rotation. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an air-suspended centrifugal fan that solves the problem of inconvenient impeller assembly and disassembly via screws, and also addresses the issue of inconvenient rotor heat dissipation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an air-suspended centrifugal fan, comprising a body, a rotating shaft disposed on the inner surface of the body, a main impeller fixedly mounted on the outer surface of one end of the rotating shaft, an auxiliary impeller fixedly mounted on the outer surface of the other end of the rotating shaft, a volute disposed on the outer surface of the body, a cooling shell fixedly covered and fixedly disposed on the outer surface of the body, a spiral blade fixedly connected to the inner surface of the cooling shell, a water inlet and a water outlet fixedly connected to the lower surface of the cooling shell, a first extrusion block and a second extrusion block disposed on the inner surface of the rotating shaft, the outer ends of the first extrusion block and the second extrusion block being extruded and fixedly attached to the inner surfaces of the main impeller and the auxiliary impeller, circular grooves being formed at both ends of the rotating shaft, threaded pins being threadedly connected to the circular grooves, and a conical extrusion protrusion being disposed at the outer end of the threaded pin.

[0005] Preferably, the outer surface of the conical extrusion protrusion is pressed against the inner surface of the first extrusion block and the second extrusion block, and the inner surface of the main impeller and the auxiliary impeller is provided with positioning grooves, and the outer ends of the first extrusion block and the second extrusion block are pressed and fixed along the positioning grooves.

[0006] Preferably, the outer surface of the rotating shaft is provided with a sliding opening, and the outer surfaces of the first extrusion block and the second extrusion block are slidably connected to the inner surface of the sliding opening.

[0007] Preferably, the inner ends of the first extrusion block and the second extrusion block are provided with protrusions, and springs are fixed to the surface of the protrusions. The upper ends of the springs are fixedly connected to the inner surfaces of the circular grooves at both ends of the rotating shaft.

[0008] Preferably, the outer end surface of the tapered extrusion protrusion is provided with a hexagonal groove.

[0009] Preferably, the water inlet is distributed on the inner surface of one side of the lower end of the cooling shell, and the water outlet is distributed on the inner surface of the other side of the lower end of the cooling shell.

[0010] Preferably, the spiral blades and cooling shell are made of aluminum.

[0011] Compared with the prior art, this utility model provides an air-suspended centrifugal fan, which has the following beneficial effects: By using a main impeller and an auxiliary impeller fitted at both ends of the rotating shaft, and through the built-in retractable first and second extrusion blocks, the conical extrusion protrusion can be rotated via a threaded pin to expand the first and second extrusion blocks. This expands and extrudes the main impeller and the auxiliary impeller, which are locked in place. The mechanism is secure, easy to install and disassemble, and does not require disassembling parts. Furthermore, a cooling shell and spiral blades are installed on the outside of the machine body to guide the cooling water in, which can rotate and flow evenly outside the machine body, facilitating the cooling of the rotor and making cooling convenient. Attached Figure Description

[0012] Figure 1This is the first schematic diagram of the overall structure (cross-sectional view of the cooling shell); Figure 2 This is the second schematic diagram of the overall structure (cross-sectional view of the cooling shell); Figure 3 This is a schematic diagram showing the connection relationship between the main impeller, the auxiliary impeller, and the shaft. Figure 4 This is a cross-sectional schematic diagram showing the connection relationship between the main impeller and the auxiliary impeller and the shaft; Figure 5 This is an enlarged view of point A; Figure 6 A schematic diagram showing the distribution relationship between threaded pins and tapered extrusion protrusions.

[0013] In the diagram: 1. Body, 2. Shaft, 3. Main impeller, 4. Secondary impeller, 5. Volute, 6. Cooling shell, 7. Spiral blade, 8. Water inlet, 9. Water outlet, 10. First extrusion block, 100. Second extrusion block, 11. Circular groove, 12. Threaded pin, 13. Conical extrusion protrusion, 110. Sliding mouth, 14. Hexagonal groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] This utility model provides a technical solution: an air-suspended centrifugal fan, comprising a body 1, a rotating shaft 2 disposed on the inner surface of the body 1, a main impeller 3 fixedly mounted on the outer surface of one end of the rotating shaft 2, and a secondary impeller 4 fixedly mounted on the outer surface of the other end of the rotating shaft 2, a volute 5 disposed on the outer surface of the body 1, a cooling shell 6 fixedly covered and fixedly attached to the outer surface of the body 1, spiral blades 7 fixedly connected to the inner surface of the cooling shell 6, a water inlet 8 and a water outlet 9 fixedly connected to the lower surface of the cooling shell 6, a first extrusion block 10 and a second extrusion block 100 disposed on the inner surface of the rotating shaft 2, the outer ends of the first extrusion block 10 and the second extrusion block 100 being extruded and fixed to the main impeller 3 and the secondary impeller 4, respectively. On the inner surface of wheel 4, circular grooves 11 are provided at both ends of the rotating shaft 2. Threaded pins 12 are threadedly connected to the circular grooves 11. A conical extrusion protrusion 13 is provided at the outer end of the threaded pin 12. By using a main impeller and an auxiliary impeller sleeved at both ends of the rotating shaft, and through the built-in retractable first and second extrusion block structure, the threaded pin can be rotated to drive the conical extrusion protrusion to expand the first and second extrusion blocks. This expands and extrudes the main impeller and the auxiliary impeller, locking them securely. It is easy to install and disassemble without disassembling parts. Furthermore, a cooling shell and spiral blades are provided on the outside of the machine body to guide the cooling water in. The water can rotate evenly and flow outside the machine body, which facilitates the cooling of the rotor and makes cooling convenient. The outer surface of the conical extrusion protrusion 13 is pressed against the inner surface of the first extrusion block 10 and the second extrusion block 100, and the inner surface of the main impeller 3 and the auxiliary impeller 4 is provided with positioning grooves. The outer ends of the first extrusion block 10 and the second extrusion block 100 are pressed and fixed along the positioning grooves. During expansion extrusion, when the first extrusion block 10 and the second extrusion block 100 can be moved through the conical extrusion protrusion 13, the first extrusion block 10 and the second extrusion block 100 can be pressed and slid outwards. They can be expanded and pressed against the inner surface of the positioning grooves of the main impeller 3 and the auxiliary impeller 4, and can be pressed, positioned, and locked. The main impeller 3 and the auxiliary impeller 4 are easy to install. The outer surface of the rotating shaft 2 is provided with a sliding opening 110, and the outer surfaces of the first extrusion block 10 and the second extrusion block 100 are slidably connected to the inner surface of the sliding opening 110; this facilitates the first extrusion block 10 and the second extrusion block 100 to slide up and down within the sliding opening 110, and facilitates sliding and positioning. The inner ends of the first extrusion block 10 and the second extrusion block 100 are provided with protrusions, and springs 111 are fixed on the surface of the protrusions. The upper end of the springs 111 is fixedly connected to the inner surface of the circular grooves 11 at both ends of the rotating shaft 2. When the threaded pin 12 is twisted outward, the springs 111 can drive the conical extrusion protrusions 13 to slide outward, which can separate the first extrusion block 10 and the second extrusion block 100. At this time, the springs 111 press down on the first extrusion block 10 and the second extrusion block 100 to retract, and then the main impeller 3 and the auxiliary impeller 4 can be slid outward to be removed. The outer end surface of the tapered extrusion protrusion 13 is provided with a hexagonal groove 14; during use, installation and disassembly are carried out by inserting an Allen wrench into the tapered extrusion protrusion 13 in the hexagonal groove 14 and rotating it, which can rotate and twist the threaded pin 12 for installation and disassembly, making it convenient to use. The water inlet 8 is located on the inner surface of one side of the lower end of the cooling shell 6, and the water outlet 9 is located on the inner surface of the other side of the lower end of the cooling shell 6; the spiral blade 7 and the cooling shell 6 are made of aluminum; it is convenient for water to be introduced and cooled, and its spiral blade 7 can guide the cooling water to flow outside the machine body 1, and can cool the heat dissipation of the rotor, making it convenient to use and cool. The working principle of this device is as follows: A cooling shell 6 is fixedly covered on the outer surface of the machine body 1. A spiral blade 7 is fixedly connected to the inner surface of the cooling shell 6. A water inlet 8 and a water outlet 9 are fixedly connected to the lower surface of the cooling shell 6. A rotating shaft 2 is set on the inner surface of the machine body 1 and is set inside the rotor. The spiral blade 7 and the cooling shell 6 are made of aluminum. Aluminum has good heat absorption performance and facilitates heat dissipation. The water inlet 8 is connected to the water pump's guide pipe, which facilitates the introduction and discharge of water for cooling. The spiral blade 7 can guide the cooling water for cooling. The water flow is then discharged through the water outlet 9, which can guide the cooling water to flow outside the machine body 1 and cool the heat dissipation area of ​​the rotor. It is convenient to use and easy to cool. A main impeller 3 is fixedly mounted on the outer surface of one end of the rotating shaft 2, and a secondary impeller 4 is fixedly mounted on the outer surface of the other end of the rotating shaft 2. A sliding opening 110 is provided on the outer surface of the rotating shaft 2, and the outer surfaces of the first extrusion block 10 and the second extrusion block 100 are slidably connected to the inner surface of the sliding opening 110. Circular grooves 11 are provided at both ends of the rotating shaft 2, and threaded pins 12 are threadedly connected in the circular grooves 11. A conical extrusion protrusion 13 is provided at the outer end of the threaded pin 12. The outer surface of the conical extrusion protrusion 13 presses against the first extrusion block 10 and the second extrusion block 100. The inner surface of the extrusion block 100 and the inner surface of the main impeller 3 and the auxiliary impeller 4 are provided with positioning grooves. The outer ends of the first extrusion block 10 and the second extrusion block 100 are extruded and fixed along the positioning grooves. During expansion and extrusion, when the first extrusion block 10 and the second extrusion block 100 can be moved through the conical extrusion protrusion 13, the first extrusion block 10 and the second extrusion block 100 can be extruded and slid outwards. They can be expanded and extruded on the inner surface of the positioning grooves of the main impeller 3 and the auxiliary impeller 4, and can be extruded and locked. The main impeller 3 and the auxiliary impeller 4 are easy to install. Spring 111 can be reset and squeezed when threaded pin 12 is twisted outward, which can drive tapered extrusion protrusion 13 to slide outward, separating the first extrusion block 10 and the second extrusion block 100. At this time, spring 111 squeezes the first extrusion block 10 and the second extrusion block 100 downward to retract, and the main impeller 3 and the auxiliary impeller 4 can be slid outward to be removed. It is easy to install and disassemble, and does not require repeated installation and locking of parts. It is securely fixed and easy to operate.

[0016] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0017] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air-suspended centrifugal fan, comprising a body (1), characterized in that: The inner surface of the body (1) is provided with a rotating shaft (2). A main impeller (3) is fixedly installed on the outer surface of one end of the rotating shaft (2), and a secondary impeller (4) is fixedly installed on the outer surface of the other end of the rotating shaft (2). A volute (5) is provided on the outer surface of the body (1). A cooling shell (6) is fixedly covered on the outer surface of the body (1). Spiral blades (7) are fixedly connected to the inner surface of the cooling shell (6), and a water inlet (8) is fixedly connected to the lower surface of the cooling shell (6). The rotating shaft (2) has a first extrusion block (10) and a second extrusion block (100) on its inner surface. The outer ends of the first extrusion block (10) and the second extrusion block (100) are extruded and fixed to the inner surfaces of the main impeller (3) and the auxiliary impeller (4). The two ends of the rotating shaft (2) are provided with circular grooves (11). A threaded pin (12) is connected to the circular groove (11) by a thread. The outer end of the threaded pin (12) is provided with a conical extrusion protrusion (13).

2. The air-suspended centrifugal fan according to claim 1, characterized in that: The outer surface of the conical extrusion protrusion (13) is pressed against the inner surface of the first extrusion block (10) and the second extrusion block (100), and the inner surface of the main impeller (3) and the auxiliary impeller (4) is provided with positioning grooves, and the outer ends of the first extrusion block (10) and the second extrusion block (100) are pressed and fixed along the positioning grooves.

3. The air-suspended centrifugal fan according to claim 1, characterized in that: The outer surface of the rotating shaft (2) is provided with a sliding opening (110), and the outer surfaces of the first extrusion block (10) and the second extrusion block (100) are slidably connected to the inner surface of the sliding opening (110).

4. The air-suspended centrifugal fan according to claim 1, characterized in that: The inner ends of the first extrusion block (10) and the second extrusion block (100) are provided with protrusions, and springs (111) are fixed on the surface of the protrusions. The upper end of the springs (111) is fixedly connected to the inner surface of the two end circular grooves (11) of the rotating shaft (2).

5. The air-suspended centrifugal fan according to claim 1, characterized in that: The outer end surface of the conical extrusion protrusion (13) is provided with a hexagonal groove (14).

6. The air-suspended centrifugal fan according to claim 1, characterized in that: The water inlet (8) is located on the inner surface of the lower end of the cooling shell (6), and the water outlet (9) is located on the inner surface of the other side of the lower end of the cooling shell (6).

7. The air-suspended centrifugal fan according to claim 1, characterized in that: The spiral blades (7) and cooling shell (6) are made of aluminum.

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