Single impeller ring fan

Abstract

The utility model provides a single vane annular fan belongs to fan technical field. It solved the problem of annular fan air port connecting structure instability in the prior art. The utility model discloses volute front cover, volute main part, driving motor, air inlet component and air outlet component, volute front cover is fixedly connected with volute main part one end, and the lower end of volute main part is integrally formed with the air port connecting flange, the number of air port connecting flange is two and sets up symmetrically, and the connecting ring body is formed in the air port connecting flange, and the first support grating and second support grating are connected in the connecting ring body, and the fixed convex body is formed in the air port connecting flange outside the connecting ring body, and the fixed hole is seted up in the fixed convex body, and the fixed pin is arranged in the fixed hole and is fixed respectively through the air inlet shell and the air outlet shell, and the air port connecting flange is formed with a plurality of reinforcing convex ribs close to the outer circumference. The utility model has the advantages of stable connecting structure, higher connecting precision.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology and relates to a single impeller annular fan. Background Technology

[0002] An annular blower is a high-efficiency, high-pressure fluid conveying device. During operation, the impeller rotates at high speed, driving the airflow to form a vortex. The airflow is gradually pressurized within the annular casing and then outputs a stable pressure. It is a commonly used small fluid power device in industrial and civilian fields.

[0003] Chinese patent publication number CN206522260U discloses a ring-shaped high-pressure blower without a motor front cover. It includes a motor, a blower, a lifting ring, a shock-resistant base, a first air outlet, a second air outlet, a clamp, a dust cover, a filter screen, and a hook ring. The motor is connected to the blower, and a lifting ring is provided on the top of the motor. The shock-resistant base is connected to the bottom of the blower. The first air outlet and the second air outlet are respectively opened on the left and right sides of the rear end of the blower. A detachable filter screen is provided in the first air outlet, and a hook ring is connected to the filter screen. A clamp is provided at both the first air outlet and the second air outlet. The dust cover is rotatably connected to the clamp, and the dust cover fits into the openings at the rear ends of the first air outlet and the second air outlet.

[0004] In the annular high-pressure blower without a motor front cover provided by this patent, only clamps are set at the first and second air inlets. The dust cover is rotatably connected to the clamps and sealed by fitting. It lacks axial and circumferential positioning mechanisms. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a single-impeller annular fan.

[0006] The objective of this utility model can be achieved through the following technical solution: A single-impeller annular fan includes a volute front cover, a volute body, a drive motor, an air inlet assembly, and an air outlet assembly. The volute front cover is fixedly connected to one end of the volute body. An air outlet connecting flange is integrally formed at the lower end of the volute body. The number of air outlet connecting flanges is two, and they are arranged symmetrically. The air inlet assembly includes an air inlet shell, a first sponge filter cartridge, a first support grille, an air inlet end cover, and an air inlet protective net. The air outlet assembly includes an air outlet shell, a second sponge filter cartridge, a second support grille, and an air outlet end cover. A connecting ring is formed in the air outlet connecting flange. The first sponge filter is sleeved and connected to the outside of the first support grid, and the second sponge filter is sleeved and connected to the outside of the second support grid. The first support grid and the second support grid extend into the connecting ring and are connected. A fixing protrusion is formed in the air outlet connecting flange on the outside of the connecting ring. A fixing hole is opened in the fixing protrusion. A fixing pin passes through the fixing hole and passes through the air inlet housing and the air outlet housing respectively and is fixed. Several reinforcing ribs are formed near the outer periphery of the air outlet connecting flange. The drive motor is fixedly connected to the rear end of the volute body.

[0007] In the above-mentioned single-impeller annular fan, an air outlet gasket is installed on the outer end of the air outlet connecting flange. The air outlet gasket has a quasi-annular structure and the outer circumference shape of the air outlet gasket is the same as that of the air outlet connecting flange.

[0008] In the aforementioned single-impeller annular fan, the inlet end cover and the outlet end cover are respectively installed on one side of the inlet housing and the outlet housing. An inlet gasket and an outlet gasket are respectively installed at the outer ends of the inlet end cover and the outlet end cover. An inlet flange and an outlet flange are respectively installed on the outside of the inlet gasket and the outlet gasket. The inlet flange and the outlet flange are fixedly connected to the inlet housing and the outlet housing by bolts.

[0009] In the aforementioned single-impeller annular fan, the inlet protective mesh is installed between the inlet flange and the inlet gasket.

[0010] In the above-mentioned single-impeller annular fan, a connecting protrusion is formed at the lower end of the front cover of the volute, and a mounting base plate is fixedly connected to the lower end of the connecting protrusion. A locking protrusion is formed between the air outlet connecting flange of the volute body, and fastening bolts are fixedly installed in the locking protrusion and the mounting base.

[0011] Compared with the prior art, the single-impeller annular fan provided by this utility model has the following beneficial effects: 1. The air outlet connecting flange is integrally formed at the lower end of the volute body, which not only improves the overall structural strength and reduces the gaps in the assembly of multiple parts, but also provides a precise installation benchmark for the support grille. With the help of the fixing protrusion and fixing pin, it can avoid misalignment of the air inlet and air outlet components, effectively reduce the risk of air leakage, and ensure the aerodynamic efficiency of the fan; 2. The sponge filter cartridge is sleeved outside the support grille. Combined with the connection method between the support grille and the connecting ring, it not only ensures the stability of the filtration effect, but also makes the filter cartridge easy to disassemble and assemble, and makes the later maintenance more efficient; 3. The locking protrusion between the air outlet connecting flanges cooperates with the fastening bolts of the mounting base plate, which improves the connection stability between the volute body and the mounting structure, distributes the operating load, and effectively reduces the vibration and operating noise of the whole machine. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a schematic diagram of the main structure of the volute.

[0013] In the diagram: 1. Front cover of the volute; 11. Connecting protrusion; 2. Volute body; 21. Air outlet connecting flange; 211. Connecting ring; 212. Fixing protrusion; 213. Fixing hole; 214. Reinforcing rib; 22. Locking protrusion; 3. Drive motor; 4. Air inlet assembly; 41. Air inlet housing; 42. First sponge filter cartridge; 43. First support grille; 44. Air inlet end cover; 45. Air inlet protective net; 46. Air inlet gasket; 47. Air inlet flange; 5. Air outlet assembly; 51. Air outlet housing; 52. Second sponge filter cartridge; 53. Second support grille; 54. Air outlet end cover; 55. Air outlet gasket; 56. Air outlet flange; 6. Fixing pin; 7. Air outlet gasket; 8. Mounting base plate; 9. Fastening bolts. Detailed Implementation

[0014] 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.

[0015] like Figures 1 to 3 As shown, this embodiment is an example Figures 1 to 3 As shown, this embodiment discloses a single-impeller annular fan, including a volute front cover 1, a volute body 2, a drive motor 3, an air inlet assembly 4, and an air outlet assembly 5.

[0016] like Figures 1 to 3As shown, a connecting protrusion 11 is integrally formed at the lower end of the front cover 1 of the volute. The lower end of the connecting protrusion 11 is fixedly connected to the mounting base plate 8 by bolts, providing a stable mounting foundation for the whole machine. One end of the volute body 2 is fixedly connected to the front cover 1 of the volute by bolts. The lower end of the volute body 2 has two air outlet connecting flanges 21 integrally formed. The two air outlet connecting flanges 21 are symmetrically distributed and are respectively adapted to the installation of the air inlet assembly 4 and the air outlet assembly 5, ensuring the regularity of the airflow path. A connecting ring 211 is formed in the middle of each air outlet connecting flange 21. The air outlet connecting flange 211 is connected to the air outlet connecting flange 211. A fixing protrusion 212 is integrally formed on the air outlet connecting flange 21, and a through fixing hole 213 is opened in the fixing protrusion 212. At the same time, a number of reinforcing ribs 214 are distributed near the outer periphery of the air outlet connecting flange 21. The reinforcing ribs 214 improve the structural strength of the air outlet connecting flange 21. In addition, a locking protrusion 22 is formed between the two air outlet connecting flanges 21 of the volute body 2. The locking protrusion 22 and the mounting base plate 8 are respectively provided with bolt holes, and fastening bolts 9 are fixedly installed inside, further improving the connection stability between the volute body 2 and the mounting base plate 8.

[0017] like Figure 1 and Figure 2 As shown, the air inlet assembly 4 includes an air inlet housing 41, a first sponge filter cartridge 42, a first support grille 43, an air inlet end cap 44, an air inlet protective net 45, an air inlet gasket 46, and an air inlet flange 47. The first sponge filter cartridge 42 is fitted and fixed to the outside of the first support grille 43 to form a primary filtration structure. The end of the first support grille 43 away from the filter end extends into the connecting ring 211 of the air inlet connecting flange 21 and is fixed to ensure accurate installation positioning. The air inlet end cap 44 is installed on the side of the air inlet housing 41 away from the flange connection. The air inlet gasket 46 and the air inlet flange 47 are sequentially fitted and installed on its outer end. The air inlet flange 47 is fastened to the air inlet housing 41 by bolts. The air inlet protective net 45 is clamped and fixed between the air inlet flange 47 and the air inlet gasket 46 to achieve secondary protection filtration and prevent large particles of debris from entering the fan.

[0018] like Figure 1 and Figure 2 As shown, the air outlet assembly 5 includes an air outlet housing 51, a second sponge filter cartridge 52, a second support grille 53, an air outlet end cap 54, an air outlet gasket 55, and an air outlet flange 56. Its structure is symmetrically arranged with the air inlet assembly 4. The second sponge filter cartridge 52 is sleeved and fixed to the outside of the second support grille 53, and the second support grille 53 extends into the connecting ring 211 on the corresponding side and is fixed. The air outlet end cap 54 is installed on one side of the air outlet housing 51, and the outer end is sequentially attached to the air outlet gasket 55 and the air outlet flange 56. The air outlet flange 56 is fastened to the air outlet housing 51 by bolts to ensure the sealing performance of the air outlet.

[0019] To elaborate further, such as Figure 2 As shown, an air outlet gasket 7 is fitted to the outer end of the air outlet connecting flange 21. The air outlet gasket 7 has a ring-like structure, and its outer circumference is perfectly matched with the air outlet connecting flange 21. It can fill the gap between the flange and the housing connection surface and improve the sealing effect. A fixing pin 6 is inserted into the fixing hole 213 of the fixing protrusion 212. The fixing pin 6 passes through the air inlet housing 41 and the air outlet housing 51 in sequence and cooperates with the fixing hole 213 to realize the pre-positioning of the component. It is then used to fasten the bolt connection between the fixing protrusion 214 and the end of the housing. The double fixing ensures a stable connection and avoids displacement during operation.

[0020] To elaborate further, such as Figure 1 and 2 As shown, the drive motor 3 is fixedly connected to the rear end of the volute body 2 by bolts, and its output end is connected to the impeller inside the fan to provide power for airflow.

[0021] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0022] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A single-impeller annular fan, comprising a volute front cover (1), a volute body (2), a drive motor (3), an air inlet assembly (4), and an air outlet assembly (5), wherein the volute front cover (1) is fixedly connected to one end of the volute body (2), characterized in that: The lower end of the volute body (2) is integrally formed with an air outlet connecting flange (21). There are two air outlet connecting flanges (21) arranged symmetrically. The air inlet assembly (4) includes an air inlet housing (41), a first sponge filter cartridge (42), a first support grille (43), an air inlet end cap (44), and an air inlet protective net (45). The air outlet assembly (5) includes an air outlet housing (51), a second sponge filter cartridge (52), a second support grille (53), and an air outlet end cap (54). A connecting ring (211) is formed in the air outlet connecting flange (21). The first sponge filter cartridge (42) is sleeved and connected to the outside of the first support grille (43). The second sponge filter cartridge (42) is sleeved and connected to the outside of the first support grille (43). The cylinder (52) is sleeved and connected to the outside of the second support grille (53). The first support grille (43) and the second support grille (53) extend into the connecting ring (211) and are connected. A fixing protrusion (212) is formed in the air outlet connecting flange (21) on the outside of the connecting ring (211). A fixing hole (213) is opened in the fixing protrusion (212). A fixing pin (6) is passed through the fixing hole (213) and the fixing pin (6) passes through the air inlet housing (41) and the air outlet housing (51) respectively and is fixed. Several reinforcing ribs (214) are formed near the outer periphery of the air outlet connecting flange (21). The drive motor (3) is fixedly connected to the rear end of the volute body (2).

2. The single-impeller annular fan according to claim 1, characterized in that: An air vent gasket (7) is installed on the outer end of the air vent connecting flange (21). The air vent gasket (7) has a ring-like structure and the outer circumference shape of the air vent gasket (7) is the same as that of the air vent connecting flange (21).

3. A single-impeller annular fan according to claim 1, characterized in that: The air inlet end cap (44) and the air outlet end cap (54) are respectively installed on one side of the air inlet housing (41) and the air outlet housing (51). An air inlet gasket (46) and an air outlet gasket (55) are respectively installed at the outer ends of the air inlet end cap (44) and the air outlet end cap (54). An air inlet flange (47) and an air outlet flange (56) are respectively installed on the outside of the air inlet gasket (46) and the air outlet gasket (55). The air inlet flange (47) and the air outlet flange (56) are fixedly connected to the air inlet housing (41) and the air outlet housing (51) by bolts.

4. A single-impeller annular fan according to claim 1, characterized in that: The air inlet protective net (45) is installed between the air inlet flange (47) and the air inlet gasket (46).

5. A single-impeller annular fan according to claim 1, characterized in that: A connecting protrusion (11) is formed at the lower end of the front cover (1) of the volute, and a mounting base plate (8) is fixedly connected to the lower end of the connecting protrusion (11). A locking protrusion (22) is formed between the air outlet connecting flange (21) of the volute body (2), and a fastening bolt (9) is fixedly installed in the locking protrusion (22) and the mounting base.

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