Multi-stage turbine aeration fan

Abstract

The utility model belongs to the technical field of aeration fans, and discloses a multi-stage turbine aeration fan which comprises a front bearing part and a rear bearing part, the front bearing part and the rear bearing part are rotationally installed at the two ends of a main shaft respectively, a plurality of impellers and charging turbines are fixedly connected to the main shaft in a sleeved mode, and the impellers and the charging turbines are covered with a middle machine shell. The middle machine shell comprises a front side shell body and a rear side shell body, the front side shell body and the rear side shell body are fixedly connected through a flange, and a water cooling mechanism is arranged between the front side shell body and the rear side shell body. According to the multistage turbine aeration fan disclosed by the utility model, the impeller and the supercharging turbine are arranged, so that supercharging, diversion and improvement of the efficiency of the fan are facilitated, the curved surface type middle shell formed by stamping a thin plate is arranged, so that the requirement of air fluid mechanics is better met, the heat dissipation area is increased, and heat dissipation and cooling are facilitated; and meanwhile, the impeller, the charging turbine, the main shaft and the rear bearing piece are cooled to a certain degree, and the service life of the impeller, the charging turbine, the main shaft and the rear bearing piece is prolonged.

Description

Technical Field

[0001] The utility model relates to a multi-stage turbine aeration fan, belonging to the technical field of aeration fans. Background Art

[0002] In order to improve the efficiency of sewage treatment and reduce the cost of sewage treatment, most of the existing sewage treatment plants adopt microbial sewage treatment. In this sewage treatment process, the aeration fan is an important process equipment, and its performance directly determines the effect of sewage treatment (including efficiency, energy consumption, cost, etc.). The existing aeration fans mostly use multi-stage centrifugal fans. The multi-stage impeller pressurizes the air, and the friction between the high-speed rotating impeller and the air will increase the air temperature in the fan. However, most of the existing multi-stage centrifugal fans are not equipped with heat dissipation devices, and only rely on the natural heat dissipation of the casing. The heat dissipation effect is not good, which will cause the outlet temperature to be too high, affect the activity of microorganisms, and reduce the sewage treatment efficiency. Therefore, a multi-stage turbine aeration fan that is easy to dissipate heat is needed. Utility Model Content

[0003] The utility model aims to provide a multi-stage turbine aeration fan.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multi-stage turbine aeration fan, comprising a front bearing member, an air inlet casing, a plurality of intermediate casings, a plurality of impellers, a main shaft, a rear bearing member and an air outlet volute casing, wherein the front bearing member and the rear bearing member are rotatably mounted at two ends of the main shaft respectively, the front bearing member and the rear bearing member are respectively mounted in the air inlet casing and the air outlet volute casing, a plurality of the impellers are fixedly sleeved on the main shaft at equal intervals, a supercharger turbine is cooperatively mounted on the rear side of the impeller, the impeller and the supercharger turbine cover the intermediate casing, the intermediate casing comprises a front side casing and a rear side casing, the front side casing and the rear side casing are fixedly connected by a flange, a limiting connecting rod is fixedly sleeved on the flange, the structure of the air inlet casing is consistent with the front side casing, and is fixedly connected to the side casing by a flange, the front side of the air outlet volute casing is fixedly connected to the front side casing of the intermediate casing on the rear side by a flange, and a water cooling mechanism is provided between the front side casing and the rear casing.

[0005] Preferably, the intermediate casing is a curved casing formed by pressure forming of a thin sheet metal material.

[0006] Preferably, the water-cooling cooling mechanism includes a front cooling jacket fixedly connected to the front side of the front shell and a rear cooling jacket on the rear side of the rear shell, the front side wall of the front cooling jacket overlaps the rear side wall of the rear cooling jacket, one end of the rear cooling jacket is fixedly connected to the front water pipe, and the other end is fixedly connected to the front water outlet pipe, one end of the front cooling jacket is provided with a water inlet recess matched with the front water outlet pipe, and the other end is fixedly connected to the rear water outlet pipe, and the rear water outlet pipe is connected to the front water pipe on the rear side through a quick pipe joint.

[0007] Preferably, the front water inlet pipe on the front side is connected to the water inlet pipe of the sewage purification device through a pipeline, and a filter is provided at the connection, and the rear water outlet pipe on the rear side is connected to the near outlet end of the water inlet pipe of the sewage purification device through a pipeline.

[0008] Preferably, the center of the rear side surface of the rear cooling jacket is a conical surface adapted to the front end of the front shell body, and is fixedly connected with a rubber sealing pad, and the water inlet recess is sealed and connected with the front water outlet pipe through a rubber sealing ring.

[0009] Preferably, the boost turbine comprises a disc-shaped turbine body fixed to the rear side of the impeller, a plurality of turbine blades are evenly arranged on the surface of the turbine body, and a blade curved surface between two adjacent turbine blades forms a guide groove.

[0010] Preferably, the surfaces of the impeller and the supercharger turbine are provided with a Teflon wear-resistant and corrosion-resistant coating.

[0011] Preferably, a casing seal is provided between the front casing and the impeller, and the casing seal includes a stationary ring fixed on the inner wall of the front casing and a rotating ring fixedly installed on the impeller, and the side of the rotating ring facing the stationary ring is provided with more than two rubber sealing rings arranged in concentric circles, and the outer wall of the rubber sealing ring is slidably fitted with the side of the stationary ring facing the rotating ring.

[0012] Preferably, the side surface of the stationary ring facing the rotating ring and the outer wall of the rubber sealing ring are smooth surfaces.

[0013] Preferably, the side of the stationary ring facing the rotating ring and the outer wall of the rubber sealing ring are provided with a Teflon self-lubricating and wear-resistant coating.

[0014] Beneficial Effects

[0015] The multi-stage turbine aeration fan of the utility model is convenient for pressurization and diversion by arranging an impeller and a supercharger turbine, so as to improve the working efficiency of the fan. By arranging a curved intermediate casing stamped by a thin plate, it is more in line with the requirements of air fluid mechanics, increases the heat dissipation area, and is convenient for heat dissipation and cooling. By arranging a water-cooling cooling mechanism, it is convenient to effectively reduce the outlet air temperature. At the same time, the impeller, supercharger turbine, main shaft and rear bearing are cooled to a certain extent, thereby increasing their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the side section structure in the utility model;

[0018] Figure 3 for Figure 2 A in the enlarged view;

[0019] Figure 4 for Figure 2 The enlarged view of point B in the figure;

[0020] Figure 5 This is a schematic diagram of the structure of the front cooling jacket in the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the rear cooling jacket of the utility model;

[0022] Figure 7 It is a schematic diagram of the structure of the supercharger turbine in the utility model.

[0023] In the figure: 1. front bearing; 2. air inlet casing; 3. middle casing; 3.1. front casing; 3.2. rear casing; 3.3. flange; 3.4. limit connecting rod; 3.5. front cooling jacket; 3.6. rear cooling jacket; 3.7. front water inlet pipe; 3.8. front water outlet pipe; 3.9. water inlet recess; 3.10. rear water outlet pipe; 3.11. quick pipe joint; 3.12. rubber sealing pad; 3.13. rubber sealing ring; 4. impeller; 5. supercharger turbine; 5.1. turbine body; 5.2. turbine blades; 5.3. blade curved surface; 5.4. guide groove; 6. main shaft; 7. rear bearing; 8. air outlet volute; 9. casing seal; 9.1. stationary ring; 9.2. rotating ring; 9.3. rubber sealing ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-7As shown, the utility model provides a technical solution: a multi-stage turbine aeration fan, including a front bearing member 1, an air inlet casing 2, a plurality of intermediate casings 3, a plurality of impellers 4, a main shaft 6, a rear bearing member 7 and an air outlet volute 8, the front bearing member 1 and the rear bearing member 7 are rotatably mounted on both ends of the main shaft 6, and the main shaft 6 is limited, the front bearing member 1 and the rear bearing member 7 are respectively mounted in the air inlet casing 2 and the air outlet volute 8, the front end of the front bearing member 1 is provided with a conical shaft head, and the front end of the main shaft 6 is wrapped, and the rear end of the main shaft 6 extends to the air outlet volute The housing 8 is connected to the drive motor through a coupling. In this embodiment, the front bearing member 1 and the rear bearing member 7 are rolling bearings. A plurality of impellers 4 are fixedly sleeved on the main shaft 6 at equal intervals. A supercharger turbine 5 is installed on the rear side of the impeller 4. The surfaces of the impeller 4 and the supercharger turbine 5 are provided with a Teflon wear-resistant and corrosion-resistant coating. In this embodiment, the impeller 4 and the supercharger turbine 5 are key-connected to the main shaft 6. The impeller 4 is used to pressurize the air when rotating. The pressurized air is transmitted to the next-stage impeller 4 through the supercharger turbine 5. The impeller 4 and the supercharger turbine 5 are in the outer cover. The number of intermediate casings 3 corresponds to that of the impeller 4, and they are coaxially arranged in series. The intermediate casing 3 includes a front casing 3.1 and a rear casing 3.2, and the front casing 3.1 and the rear casing 3.2 are fixedly connected by a flange 3.3. A limiting connecting rod 3.4 is fixedly sleeved on the flange 3.3. The number of the limiting connecting rods 3.4 is more than two, and they are evenly installed on the flange 3.3 along the circumferential direction. The limiting connecting rods 3.4 in this embodiment are threaded rods. The structure of the air inlet casing 2 is consistent with that of the front casing 3.1, and is fixedly sleeved on the flange 3.3. .3 is fixedly connected to the rear shell 3.2 on the front side, a reinforcing plate is welded and fixed to the front outer wall of the air inlet casing 2, the front side of the air outlet volute 8 is fixedly connected to the front shell 3.1 of the rear intermediate casing 3 through a flange 3.3, and is communicated with each other. A water cooling mechanism is provided between the front shell 3.1 and the rear shell 3.2, which is convenient for reducing the air temperature in the fan, thereby effectively reducing the outlet air temperature, and at the same time, the impeller 4, the supercharger turbine 5, the main shaft 6 and the rear bearing 7 are cooled to a certain extent, thereby increasing their service life.

[0026] Specifically, the middle casing 3 is a curved casing formed by pressure forming of a thin plate metal material. The middle casing 3 in this embodiment is made of stainless steel, and the thickness of the side wall is 1-5 mm. The curved middle casing is manufactured by pressure forming of a thin plate metal material, and it is easy to achieve the curved shape requirements that meet the requirements of air fluid mechanics through a mold. At the same time, compared with a flat casing, the heat dissipation area is also increased, which is convenient for heat dissipation and cooling.

[0027] Specifically, the water-cooling mechanism includes a front cooling jacket 3.5 fixedly connected to the front side of the front shell 3.1 and a rear cooling jacket 3.6 fixedly connected to the rear side of the rear shell 3.2. The front side wall of the front cooling jacket 3.5 overlaps the rear side wall of the rear cooling jacket 3.6. One end of the rear cooling jacket 3.6 is fixedly connected to a front water pipe 3.7, and the other end is fixedly connected to a front water outlet pipe 3.8 protruding backwards. One end of the front cooling jacket 3.5 is provided with a water inlet recessed hole 3.9 matched with the front water outlet pipe 3.8, and the other end is fixedly connected to a rear water outlet pipe 3.10. The rear water outlet pipe 3.10 is connected to the front water pipe 3.7 on the rear side of the front cooling jacket 3.5 through a quick pipe joint 3.11. The quick pipe joint 3.11 in this embodiment is a stainless steel Luer joint. The cooling water in this embodiment is For the sewage to be treated with soluble impurities, the front water inlet pipe 3.7 on the front side is connected to the water inlet pipe of the sewage purification device through a pipeline, and a filter is provided at the connection to intercept insoluble impurities in the sewage to prevent the insoluble impurities from being deposited in the water cooling mechanism and affecting the cooling effect. The rear water outlet pipe 3.10 on the rear side is connected to the near-outlet end of the water inlet pipe of the sewage purification device through a pipeline. Since the water pressure in the water inlet pipe of the sewage purification device is positive pressure, there is no need to set up an additional power device to drive the cooling water. The front cooling jacket 3.5 and the rear cooling jacket 3.6 are made of stainless steel. The center of the rear side surface of the rear cooling jacket 3.6 is a conical surface adapted to the front end of the front shell 3.1, and is fixedly connected with a rubber sealing pad 3.12. The water inlet recess 3.9 is sealed and connected to the front water outlet pipe 3.8 through a rubber sealing ring 3.13.

[0028] Specifically, the supercharger turbine 5 includes a disc-shaped turbine body 5.1 fixed to the rear side of the impeller 4. A plurality of turbine blades 5.2 are evenly arranged on the surface of the turbine body 5.1. A blade curved surface 5.3 between two adjacent turbine blades 5.2 forms a guide groove 5.4. The turbine blades 5.2 and the guide groove 5.4 are integrated into one, having a double-layer effect of supercharging and guiding, and facilitating the introduction of pressurized air into the rear-stage impeller 4 and the supercharger turbine 5.

[0029] Specifically, a housing seal 9 is provided between the front housing 3.1 and the impeller 4. The housing seal 9 comprises a stationary ring 9.1 fixed on the inner wall of the front housing 3.1 and a rotating ring 9.2 fixedly mounted on the impeller 4. The rotating ring 9.2 is provided with two or more rubber sealing rings 9.3 arranged in concentric circles on the side of the stationary ring 9.1. The outer wall of the rubber sealing ring 9.3 is slidably fitted with the side of the stationary ring 9.1 facing the rotating ring 9.2. The housing seal 9 can effectively prevent the airflow at the outlet of the impeller 4 from flowing back to the inlet of the impeller 4, thereby playing a sealing role. The rubber sealing ring 9.3 plays a sealing and buffering role between the stationary ring 9.1 and the rotating ring 9.2, thereby preventing the rotating ring 9.2 from having a hard collision with the stationary ring 9.1 when the impeller 4 rotates, thereby causing damage. The side of the stationary ring 9.1 facing the rotating ring 9.2 and the outer wall of the rubber sealing ring 9.3 are smooth surfaces. In this embodiment, the side of the stationary ring 9.1 facing the rotating ring 9.2 and the outer wall of the rubber sealing ring 9.3 are provided with a Teflon self-lubricating and wear-resistant coating.

[0030] The working process of the utility model is as follows: air enters the multi-stage turbine aeration fan through the air inlet casing 2, and the main shaft 6 drives the impellers 4 of each stage to rotate. When the impeller 4 of each stage rotates, the pressure of the sucked air increases, and is transmitted to the impeller 4 of the next stage through the booster turbine 5, and is finally output through the air outlet volute 8. The cooling water enters the rear cooling jacket 3.6 through the front water pipe 3.7 on the front side, and then enters the front cooling jacket 3.5 on the rear side through the front water outlet pipe 3.8 on the rear cooling jacket 3.6, and then flows into the next rear cooling jacket 3.6 through the rear water outlet pipe 3.10 on the front cooling jacket 3.5. The multi-stage turbine aeration fan of the utility model is convenient for pressurization and flow diversion by arranging the impeller and the supercharger turbine, and is convenient for improving the working efficiency of the fan. By arranging the curved intermediate casing made of thin plate stamping, it is more in line with the requirements of air fluid mechanics, increases the heat dissipation area, and is convenient for heat dissipation and cooling. By arranging the water cooling mechanism, it is convenient to effectively reduce the outlet air temperature, and at the same time, the impeller, supercharger turbine, main shaft and rear bearing are cooled to a certain extent, thereby increasing their service life.

Claims

1. A multi-stage turbine aeration fan, comprising a front bearing member (1), an air inlet casing (2), a plurality of intermediate casings (3), a plurality of impellers (4), a main shaft (6), a rear bearing member (7) and an air outlet volute (8), characterized in that: The front bearing member (1) and the rear bearing member (7) are rotatably mounted on the two ends of the main shaft (6), respectively. The front bearing member (1) and the rear bearing member (7) are respectively mounted in the air inlet casing (2) and the air outlet volute (8). A plurality of impellers (4) are fixedly sleeved on the main shaft (6) at equal intervals. A supercharger turbine (5) is mounted on the rear side of the impeller (4). The impeller (4) and the supercharger turbine (5) are covered by an intermediate casing (3). The intermediate casing (3) comprises a front casing (3.1) and a rear casing (3.2). The front casing (3 .1) and the rear side housing (3.2) are fixedly connected via a flange (3.3), a limit connecting rod (3.4) is fixedly sleeved on the flange (3.3), the structure of the air inlet casing (2) is consistent with that of the front side housing (3.1), and is fixedly connected to the front side rear side housing (3.2) via the flange (3.3), the front side of the air outlet volute (8) is fixedly connected to the front side housing (3.1) of the rear side intermediate housing (3) via the flange (3.3), and a water cooling mechanism is provided between the front side housing (3.1) and the rear side housing (3.2).

2. A multi-stage turbine aeration blower according to claim 1, characterized in that: The intermediate casing (3) is a curved casing formed by pressure forming a thin sheet metal material, and the intermediate casing (3) is made of stainless steel.

3. A multi-stage turbine aeration blower according to claim 1, characterized in that: The water-cooling mechanism comprises a front cooling jacket (3.5) fixedly connected to the front side of the front shell (3.1) and a rear cooling jacket (3.6) fixedly connected to the rear side of the rear shell (3.2); the front side wall of the front cooling jacket (3.5) overlaps the rear side wall of the rear cooling jacket (3.6); one end of the rear cooling jacket (3.6) is fixedly connected to a front water pipe (3.7) and the other end is fixedly connected to a front water outlet pipe (3.8); one end of the front cooling jacket (3.5) is provided with a water inlet recess (3.9) matched with the front water outlet pipe (3.8) and the other end is fixedly connected to a rear water outlet pipe (3.10); the rear water outlet pipe (3.10) is connected to the front water pipe (3.7) at the rear side via a quick pipe joint (3.11).

4. A multi-stage turbine aeration blower according to claim 3, characterized in that: The front water inlet pipe (3.7) at the frontmost side is connected to the water inlet pipe of the sewage purification device through a pipeline, and a filter screen is provided at the connection point. The rear water outlet pipe (3.10) at the rearmost side is connected to the near outlet end of the water inlet pipe of the sewage purification device through a pipeline. The front cooling jacket (3.5) and the rear cooling jacket (3.6) are made of stainless steel.

5. The multi-stage turbine aeration blower according to claim 3, characterized in that: The center of the rear side surface of the rear cooling jacket (3.6) is a conical surface that matches the front end of the front shell (3.1) and is fixedly connected to a rubber sealing pad (3.12). The water inlet recessed hole (3.9) is sealed and connected to the front water outlet pipe (3.8) via a rubber sealing ring (3.13).

6. The multi-stage turbine aeration blower according to claim 1, characterized in that: The booster turbine (5) comprises a disc-shaped turbine body (5.1) fixed to the rear side of the impeller (4); a plurality of turbine blades (5.2) are evenly arranged on the surface of the turbine body (5.1); and a blade curved surface (5.3) between two adjacent turbine blades (5.2) forms a guide groove (5.4).

7. The multi-stage turbine aeration blower according to claim 1, characterized in that: The surfaces of the impeller (4) and the supercharger turbine (5) are provided with a Teflon wear-resistant and corrosion-resistant coating.

8. The multi-stage turbine aeration blower according to claim 1, characterized in that: A casing seal (9) is provided between the front casing (3.1) and the impeller (4), the casing seal (9) comprising a stationary ring (9.1) fixed on the inner wall of the front casing (3.1) and a rotating ring (9.2) fixedly mounted on the impeller (4), the rotating ring (9.2) being provided with two or more rubber sealing rings (9.3) arranged in concentric circles on the side of the stationary ring (9.1), the outer wall of the rubber sealing ring (9.3) being slidably fitted with the side of the stationary ring (9.1) facing the rotating ring (9.2).

9. A multi-stage turbine aeration blower according to claim 8, characterized in that: The side surface of the stationary ring (9.1) facing the rotating ring (9.2) and the outer wall of the rubber sealing ring (9.3) are smooth surfaces.

10. The multi-stage turbine aeration blower according to claim 8, characterized in that: The side of the stationary ring (9.1) facing the rotating ring (9.2) and the outer wall of the rubber sealing ring (9.3) are provided with a Teflon self-lubricating and wear-resistant coating.

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