High pressure vortex fan

Abstract

The utility model relates to a spraying equipment field especially relates to a high pressure vortex fan. It includes volute, volute is equipped with the communicating port to communicate to have the spraying jar body of positive pressure inert gas, volute rear end wall has opened the axle hole, still includes drive arrangement and pivot, pivot rear part is driven connection by drive arrangement and front part is passed through the axle hole and enters volute inside, and the turbine blade is installed to pivot front part, drive arrangement drives pivot together with turbine blade rotation, and the first bearing is equipped with between pivot outside and axle hole hole wall, and the slit between its inner and outer rings is connected to volute inside before end and is connected to volute outside after end, including the air channel of counterflow, and the air inlet of its is filled in with the counterflow gas slightly higher than the air pressure in volute inside, and the air outlet is aligned with the slit between the inner and outer rings of bearing before end, and the counterflow gas filled in is flowed through the slit before end to counterflow the air pressure in volute inside, prevents the air pressure in volute inside and press the dust in volute inside into the slit between the inner and outer rings of first bearing behind, and first bearing is not easy to damage.

Description

Technical Field

[0001] This utility model relates to the field of spraying equipment, and in particular to a high-pressure vortex blower. Background Technology

[0002] In the spray painting industry, to prevent oxidation of the sprayed coating, high-pressure inert gas is typically injected into the spray can to quickly establish an initial positive pressure environment. Then, a high-pressure vortex blower connected to the spray can circulates the gas inside and maintains the positive pressure. The high-pressure vortex blower includes a drive unit and a volute housing placed in the atmosphere. The volute housing has two openings: an inlet and an outlet. The interior of the volute housing is connected to the spray can through these two openings, thus maintaining a positive pressure environment. The high-pressure vortex blower also includes a shaft and a drive unit placed in the atmosphere. The rear of the shaft is driven by the drive unit, while the front is fitted with turbine blades that penetrate into the volute housing. The drive unit rotates the shaft along with the turbine blades. The inert gas inside the spray can flows into the volute housing through the inlet, is compressed and pressurized by the rotating turbine blades, and then flows back into the spray can through the outlet, thus circulating the gas inside the spray can and maintaining the positive pressure. Bearings are fitted on the outside of the shaft. The front end of the bearing is located inside the volute housing, while the rear end opens to the outside of the volute housing and comes into contact with the ambient atmosphere. The positive pressure gas inside the spray tank generates a large amount of dust during the spraying process, which affects the quality of the spraying operation. Therefore, a filter is installed between the spray tank and the air inlet of the volute housing to filter the positive pressure gas. However, the filter cannot remove all the dust, so some dust still enters the volute housing with the gas. Because the air pressure inside the volute housing is higher than that of the external environment, the dust inside the volute housing is forced into the space between the inner and outer rings of the bearing and accumulates, causing bearing damage. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a high-pressure vortex blower in which the bearing between the shaft and the volute is not easily damaged.

[0004] To solve the above problems, this utility model provides a high-pressure vortex blower, including a volute, a connecting port for connecting to a spray can containing positive pressure inert gas, a shaft hole in the rear end wall of the volute, a drive device and a rotating shaft, the rear part of the rotating shaft being driven and connected by the drive device and the front part passing through the shaft hole into the volute, a turbine blade being installed at the front part of the rotating shaft, the drive device driving the rotating shaft and the turbine blade to rotate, a first bearing being provided between the outer side of the rotating shaft and the shaft hole wall, the front end of the gap between the inner and outer rings of the first bearing opening into the volute and the rear end opening into the outside of the volute, including a counteracting air passage, the air inlet of which is supplied with counteracting gas at a pressure slightly higher than that inside the volute, and the air outlet facing forward aligned with the gap between the inner and outer rings of the first bearing, allowing the supplied counteracting gas to flow forward through the gap to counteract the air pressure inside the volute.

[0005] Furthermore, the counter-current air passage is fitted onto the outer side of the rear part of the rotating shaft, and its outlet is a ring that surrounds the outer side of the rear part of the rotating shaft.

[0006] Furthermore, the shaft bore wall has an extension extending rearward to the rear end wall of the volute, and the first bearing is specifically installed between the shaft and the extension.

[0007] Furthermore, the drive unit is specifically a drive motor, which is connected to the rear of the rotating shaft by a coupling.

[0008] Furthermore, a mounting base is provided at the bottom of the drive unit.

[0009] Furthermore, there are two connection points: an air inlet and an air outlet.

[0010] Furthermore, a connecting seat is provided, and the volute is fixed to the front end of the drive motor via the connecting seat.

[0011] Furthermore, a ring-shaped protrusion extends from the center of the front wall of the volute and surrounds the outer side of the front end of the shaft. A second bearing is provided between the outer side of the front end of the shaft and the ring-shaped protrusion.

[0012] Beneficial effects: The counteracting gas, with a pressure slightly higher than that inside the volute, flows out from the external air source and enters the counteracting air passage through the air inlet. This counteracting gas flows forward from the air outlet, aiming at the gap between the inner and outer rings of the first bearing. As it flows through the gap between the inner and outer rings of the first bearing, it tends to enter the volute from the front, counteracting the air pressure inside the volute. This prevents the air pressure inside the volute from pushing the dust inside the volute backward into the gap between the inner and outer rings of the first bearing. As a result, dust is less likely to enter and accumulate inside the first bearing, and the first bearing is less likely to be damaged. Attached Figure Description

[0013] Figure 1 This is a simplified structural diagram of a high-pressure vortex blower.

[0014] Figure 2 This is a half-sectional view of a high-pressure vortex blower.

[0015] Figure 3 yes Figure 2 A simplified enlarged diagram of point A in the middle.

[0016] Figure 4 This is a simplified structural diagram of the first bearing.

[0017] Figure 5 This is an exploded view of a high-pressure vortex blower.

[0018] Symbol explanation:

[0019] 1-Vortex housing; 2-Turbine blade; 3-Drive motor; 4-Air inlet; 5-Air outlet; 6-Connecting seat; 7-Counteracting air passage; 8-Coupling; 11-Vortex housing front end wall; 12-Vortex housing rear end wall; 21-Shaft; 22-First bearing; 23-Second bearing; 24-Shaft hole; 25-Sealing spacer; 31-Output shaft; 32-Base; 71-Air inlet; 72-Air outlet; 121-Extension; 211-Positioning step; 221-Gap between the inner and outer rings of the first bearing; 231-Annular protrusion. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments.

[0021] High-pressure vortex blower, such as Figure 1 As shown, the high-pressure vortex blower comprises a front-mounted volute 1 and a rear-mounted drive motor 3. The entire blower is mounted on a placement platform (not shown in the attached diagram) via a mounting base 32 at the bottom of the drive motor 3, with the volute 1 suspended in front of the platform. An air inlet 4 and an air outlet 5 are located on the rear end wall 12 of the volute. Both the air inlet 4 and the air outlet 5 serve as connecting ports, respectively connected via pipes to a spray can containing positive pressure inert gas (not shown in the attached diagram). The interior of the volute 1 is thus connected to the spray can. See [link to diagram]. Figure 2 The high-pressure vortex blower includes a rotating shaft 21. The rear of the rotating shaft 21 is connected to the output shaft 31 of the drive motor 3 via a coupling 8, while the front of the shaft 21 passes through a shaft hole 24 in the middle of the rear end wall 12 of the volute 1. Turbine blades 2 are mounted on the front of the rotating shaft 21. The drive motor 3 acts as the driving device, and the rotation of its output shaft 31 drives the rotating shaft 21 and the turbine blades 2 to rotate via the coupling 8. Inert gas in the spray can flows into the volute 1 through the air inlet 4, is compressed and pressurized by the rotating turbine blades 2, and then flows back into the spray can through the air outlet 5, achieving circulation and maintaining positive pressure.

[0022] See Figure 2 and Figure 3 A positioning step 211 protrudes from the middle section of the rotating shaft 21. The positioning step 211 is located inside the shaft hole 24, and its rear end is aligned with the rear end of the shaft hole 24. The shaft hole 24 has an extension 121 extending rearward to the rear end wall 12 of the volute. A first bearing 22 is provided between the outer side of the rotating shaft 21 and the extension 121, and the front end of its inner ring abuts against the rear end of the positioning step 211. The gap 221 between the inner and outer rings of the first bearing 22 (see...) Figure 4The front end of the air inlet 4 leads to the interior of the volute 1, while the rear end leads to the exterior of the volute 1, exposing it to the atmospheric environment. During the spraying process, the positive-pressure inert gas inside the spray tank generates a large amount of dust. Therefore, a filter (not shown in the attached diagram) is connected between the air inlet 4 and the spray tank to filter the positive-pressure inert gas. However, the filter cannot remove all the dust, so some dust still enters the interior of the volute 1 with the gas. The internal air pressure of the volute 1 is higher than that of the external environment, which easily forces the dust inside the volute 1 backward into the gap 221 between the inner and outer rings of the first bearing 22, causing damage to the first bearing 22. Although a sealing sleeve 25 is fitted on the outer side of the rotating shaft 21 in front of the step 211, which provides a certain degree of sealing, it will rotate relative to the rotating shaft 21, creating a small gap. Therefore, the positive-pressure inert gas inside the volute 1 will still force the dust inside the volute 1 backward into the first bearing 22 through this small gap. To this end, a counter-flow air passage 7 is added behind the rear end wall 12 of the volute and fitted onto the outer side of the rear part of the rotating shaft 21, see Figure 5 The air inlet 71 of the counter-current air passage 7 is located at the top, while the outlet 72 is located at the front. The outlet 72 is an annular ring surrounding the rear outer side of the rotating shaft 21, facing forward and aligned with the gap 221 between the inner and outer rings of the rear end of the first bearing 22. The counter-current air passage 7 covers the rear end of the first bearing 22 through the outlet 72. The air inlet 71 is connected to an external air source through a pipe. The counter-current gas flowing out from the external air source is injected into the counter-current air passage 7 through the air inlet 71. The pressure of the counter-current gas is slightly higher than the air pressure inside the volute 1. It flows forward from the outlet 72 located at the front of the counter-current air passage 7, and flows through the gap between the inner and outer rings of the first bearing 22, creating a tendency to enter the volute 1 forward. This counter-current gas pressure inside the volute 1 effectively prevents the air pressure inside the volute 1 from pushing the dust inside the volute 1 backward into the gap 221 between the inner and outer rings of the first bearing 22, thus making the first bearing 22 less prone to damage.

[0023] The high-pressure vortex blower needs to maintain overall stability when the shaft 21 rotates. Therefore, on the one hand, see... Figure 1 A connecting seat 6 is provided between the volute 1 and the drive motor 3. The volute 1 is fixed to the front end of the drive motor 3 via the connecting seat 6, and will not shake when the shaft 21 rotates; on the other hand, see Figure 2 and Figure 3 The front wall 11 of the volute extends backward from the center and has an annular protrusion 231 that surrounds the outer side of the front end of the rotating shaft 21. A second bearing 23 is provided between the outer side of the front end of the rotating shaft 21 and the annular protrusion 231 to keep the front end of the rotating shaft 21 rotating smoothly.

[0024] The above description is merely an embodiment of the present invention and does not limit the scope of patent protection. Any non-substantial changes or substitutions made by those skilled in the art based on the present invention will still fall within the scope of patent protection.

Claims

1. A high-pressure vortex blower, comprising a volute (1), the volute (1) having a connecting port for connecting to a spray can containing a positive pressure inert gas, the rear end wall (12) of the volute having a shaft hole (24), and further comprising a drive device and a rotating shaft (21), the rear part of the rotating shaft (21) being driven and connected by the drive device and the front part passing through the shaft hole (24) into the interior of the volute (1), a turbine blade (2) being mounted on the front part of the rotating shaft (21), the drive device driving the rotating shaft (21) and the turbine blade (2) to rotate, a first bearing (22) being provided between the outer side of the rotating shaft (21) and the wall of the shaft hole (24), the front end of the gap (221) between the inner and outer rings of the first bearing (22) extending into the interior of the volute (1) and the rear end extending out of the volute (1), characterized in that: It includes a counteracting air passage (7), whose air inlet (71) supplies counteracting gas with a pressure slightly higher than that inside the volute (1), and whose air outlet (72) faces forward and is aligned with the gap between the inner and outer rings of the first bearing (22), so that the counteracting gas flows forward through the gap to counteract the air pressure inside the volute (1).

2. The high pressure vortex air pump of claim 1, wherein: The counter-current air passage (7) is fitted on the outer side of the rear part of the rotating shaft (21), and its air outlet is an annular ring surrounding the outer side of the rear part of the rotating shaft (21).

3. The high pressure vortex air pump of claim 1, wherein: The shaft hole (24) has an extension (121) extending rearward to the rear end wall (12) of the volute, and the first bearing (22) is specifically installed between the shaft (21) and the extension (121).

4. The high pressure vortex air pump of claim 1, wherein: The driving device is specifically a drive motor (3), which is connected to the rear of the rotating shaft (21) by a coupling (8).

5. The high pressure vortex air pump of claim 1, wherein: The drive unit is equipped with a mounting base (32) at the bottom.

6. The high pressure vortex air pump of claim 1, wherein: There are two connection ports, namely an air inlet (4) and an air outlet (5).

7. The high pressure vortex air pump of claim 1, wherein: A connecting seat (6) is provided, and the volute (1) is fixed to the front end of the drive motor (3) via the connecting seat (6).

8. The high pressure vortex air pump of claim 1, wherein: The front wall (11) of the volute extends backward from the center and has an annular protrusion (231) that surrounds the outer side of the front end of the rotating shaft (21). A second bearing (23) is provided between the outer side of the front end of the rotating shaft (21) and the annular protrusion (231).

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