A high temperature axial flow fan with sealing device

Abstract

The utility model relates to a high-temperature axial flow fan with a sealing device, including a heat insulation sleeve, an impeller tube and a mounting seat are respectively arranged at both ends of the heat insulation sleeve, a transmission shaft and a bearing seat are arranged inside the heat insulation sleeve, a motor is arranged on the mounting seat, a avoidance hole is opened on the heat insulation sleeve, one end of the transmission shaft passes through the avoidance hole and extends into the impeller tube, a fan blade is arranged on the end of the transmission shaft extending into the impeller tube, an annular groove is opened on the side wall of the avoidance hole, a sealing device is arranged in the annular groove, and the sealing device includes an annular packing and an annular stop block. The utility model has the characteristics of preventing leakage of high-temperature gas by arranging a sealing device, and has good sealing performance.

Description

Technical Field

[0001] The utility model relates to the field of spray pots, in particular to a high-temperature axial flow fan with a sealing device. Background Art

[0002] High temperature axial flow fans are widely used in industrial furnaces such as annealing furnaces, heating furnaces, homogenizing furnaces, aging furnaces, etc.

[0003] A Chinese patent with announcement number CN211975443U discloses a high temperature resistant axial flow fan, including an annular base, a truncated cone body, an outer cylinder, a bearing and a motor. One end of the bearing passes through the truncated cone body and extends into the outer cylinder. An impeller is installed on the end of the bearing extending into the outer cylinder.

[0004] The connection between the bearing and the round table body of the above-mentioned bearing fan is not effectively sealed, which will make it easy for the high-temperature gas in the industrial furnace to leak to the outside through the connection between the bearing and the round table body during the use of the fan. Utility Model Content

[0005] The present application provides a high-temperature axial flow fan with a sealing device, which prevents leakage of high-temperature gas by providing the sealing device.

[0006] The high-temperature axial flow fan with a sealing device provided in this application adopts the following technical solution:

[0007] A high-temperature axial flow fan with a sealing device comprises a heat insulation sleeve, wherein two ends of the heat insulation sleeve are respectively provided with an impeller cylinder and a mounting seat, a transmission shaft and a bearing seat are arranged inside the heat insulation sleeve, and a motor for driving the transmission shaft to rotate is arranged on the mounting seat, the heat insulation sleeve is provided with an avoidance hole, one end of the transmission shaft passes through the avoidance hole and extends into the impeller cylinder, a fan blade is arranged on the end of the transmission shaft extending into the impeller cylinder, an annular groove is provided on the side wall of the avoidance hole, a sealing device is provided in the annular groove, the sealing device comprises an annular packing and an annular stop block, the annular packing sleeve is arranged on the outside of the transmission shaft, a plurality of fixing blocks are provided on the end of the annular packing away from the bearing seat, a plurality of slots for inserting the fixing blocks are provided on the bottom wall of the annular groove, the annular stop block is arranged on the heat insulation sleeve, and the annular stop block is used to press the annular packing into the annular groove.

[0008] By adopting the above technical solution, the leakage of high-temperature gas is prevented by arranging an annular packing, and the rotational displacement of the annular packing is limited by the cooperation of a plurality of slots and a plurality of fixing blocks, thereby further ensuring the sealing performance of the annular packing.

[0009] Preferably, a cooling water tank is provided in the heat-insulating sleeve, the transmission shaft passes through the cooling water tank, a water inlet pipe and a water outlet pipe are provided on the cooling water tank, and the annular stop block is provided on the cooling water tank.

[0010] By adopting the above technical solution, a cooling water tank is set to cool the working transmission shaft, so as to prevent the transmission shaft temperature from being too high, resulting in the lubricating effect of the lubricating oil coated on the transmission shaft being reduced.

[0011] Preferably, the cooling water tank fits the inner wall of the heat insulation sleeve close to the impeller, the cooling water tank is connected to the heat insulation sleeve by bolts, and the cooling water tank is a copper water tank.

[0012] By adopting the above technical solution, the heat in the insulation sleeve can be effectively transferred to the cooling water tank and absorbed by the coolant, thereby preventing the temperature in the insulation sleeve from being too high and causing the bearing seat and the transmission shaft to be locked. At the same time, the lubricating oil at the connection between the bearing seat and the transmission shaft is also protected.

[0013] Preferably, an annular cooling channel is opened in the transmission shaft, and two channel openings of the annular cooling channel are both located in the cooling water tank.

[0014] By adopting the above technical solution, the coolant can enter the interior of the transmission shaft to cool the transmission shaft, thereby improving the cooling effect of the coolant on the transmission shaft.

[0015] Preferably, a first one-way valve and a second one-way valve are respectively provided in the two channel openings of the annular cooling channel, the first one-way valve only allows external coolant to flow into the annular cooling channel, and the second one-way valve only allows coolant in the annular cooling channel to flow out to the outside.

[0016] By adopting the above technical solution, the coolant in the annular cooling channel is prevented from flowing back, thereby ensuring the cooling effect of the coolant on the transmission shaft.

[0017] Preferably, the plurality of fixing blocks are conical, and the diameter of the fixing blocks gradually increases from an end away from the annular packing to an end close to the annular packing.

[0018] By adopting the above technical solution, it is easier to insert a plurality of fixing blocks into a plurality of slots.

[0019] Preferably, the transmission shaft is provided with a plurality of heat dissipation fins, the plurality of heat dissipation fins are distributed in an annular manner on the transmission shaft, and the plurality of heat dissipation fins are all located in the cooling box.

[0020] By adopting the above technical solution, the heat dissipation fins can assist in transferring the heat on the drive shaft to the coolant, thereby further improving the cooling effect of the coolant on the drive shaft.

[0021] Preferably, the plurality of heat dissipation fins are arranged at an angle, and the plurality of heat dissipation fins and the transmission shaft form an impeller structure.

[0022] By adopting the above technical solution, when the transmission shaft rotates, it will drive a number of cooling fins to rotate together, thereby playing the role of a water pump, drawing the external coolant into the cooling water tank through the water inlet pipe, and then discharging the coolant that has absorbed a certain amount of heat from the cooling water tank through the water outlet pipe, so that the circulation of the coolant can be completed without the need for an external water pump.

[0023] Preferably, the annular packing is a high temperature resistant graphite packing.

[0024] By adopting the above technical solution, the high temperature resistant graphite packing has excellent high temperature resistance and is not easy to deform or fail in a high temperature environment.

[0025] The technical effects of this utility model are mainly reflected in the following aspects:

[0026] 1. The utility model prevents leakage of high-temperature gas by arranging high-temperature resistant graphite packing;

[0027] 2. The utility model limits the rotational displacement of the annular packing by the cooperation of a plurality of slots and a plurality of fixing blocks, thereby further ensuring the sealing performance of the annular packing;

[0028] 3. The utility model is provided with a cooling water tank to cool down the heat insulation cover and the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of embodiment 1.

[0030] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0031] Figure 3 It is a structural diagram of the second embodiment.

[0032] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0033] Figure 5 It is a structural diagram of embodiment 3.

[0034] Figure numerals: 1. Insulation sleeve; 11. Transmission shaft; 111. Annular cooling channel; 112. First one-way valve; 113. Second one-way valve; 12. Bearing seat; 13. Avoidance hole; 14. Ring groove; 15. Slot; 2. Impeller cylinder; 21. Fan blades; 3. Mounting seat; 31. Motor; 4. Sealing device; 41. Annular packing; 42. Annular block; 5. Fixed block; 6. Cooling water tank; 61. Water inlet pipe; 62. Water outlet pipe; 7. Heat sink fins. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with the accompanying drawings to make the technical solution of the present application easier to understand and grasp.

[0036] Embodiment 1:

[0037] Reference Figure 1 and Figure 2 A high-temperature axial flow fan with a sealing device 4 in this embodiment includes a heat-insulating sleeve 1, an impeller barrel 2 and a mounting seat 3 are respectively installed at both ends of the heat-insulating sleeve 1, a bearing seat 12 is fixed on the mounting seat 3, the bearing seat 12 is located in the heat-insulating sleeve 1, a transmission shaft 11 is rotatably connected to the bearing seat 12, an avoidance hole 13 is opened on the heat-insulating sleeve 1 along the axial direction of the transmission shaft 11, one end of the transmission shaft 11 passes through the avoidance hole 13 and extends into the impeller barrel 2, and a plurality of fan blades 21 are installed on the end of the transmission shaft 11 extending into the impeller barrel 2. A motor 31 for driving the transmission shaft 11 to rotate is also fixedly connected to the mounting seat 3, and the output shaft of the motor 31 is connected to the transmission shaft 11.

[0038] Reference Figure 1 and Figure 2 An annular groove 14 is provided on the side wall of the avoidance hole 13, and a sealing device 4 is provided in the annular groove 14. The sealing device 4 includes an annular packing 41 and an annular stop block 42. The annular packing 41 is sleeved on the outer side of the transmission shaft 11. The annular packing 41 is a high-temperature resistant graphite packing. A plurality of conical fixing blocks 5 are provided on the end of the annular packing 41 away from the bearing seat 12. The diameters of the plurality of fixing blocks 5 gradually increase from the end away from the annular packing 41 to the end close to the annular packing 41. A plurality of slots 15 for inserting the fixing blocks 5 are provided on the bottom wall of the annular groove 14.

[0039] Reference Figure 1 and Figure 2 A cooling water tank 6 is fixedly connected to the inner wall of the heat insulation sleeve 1 near the impeller by bolts, and the transmission shaft 11 passes through the cooling water tank 6. The cooling water tank 6 is a copper water tank, and the cooling water tank 6 is provided with a water inlet pipe 61 and a water outlet pipe 62. The sealing device 4 also includes an annular stopper 42 fixed on the side of the cooling water tank 6 away from the bearing seat 12 and sleeved on the transmission shaft 11. The annular stopper 42 is used to press the annular packing 41 into the annular groove 14.

[0040] Reference Figure 1 and Figure 2When the axial flow fan of the first embodiment is working, a water pump is installed on the water inlet pipe 61 to pump cooling water into the cooling water tank 6. The water entering the cooling water tank 6 absorbs the heat of the transmission shaft 11, and then the cooling water is discharged through the water outlet pipe 62, thereby completing the circulation of the cooling water. At the same time, the cooling water will also absorb the heat transferred from the heat insulation sleeve 1 through the cooling water tank 6 when circulating, thereby preventing the temperature in the heat insulation sleeve 1 from being too high, resulting in the phenomenon of the connection between the bearing seat 12 and the transmission shaft 11 being locked, and at the same time protecting the lubricating oil at the connection between the bearing seat 12 and the transmission shaft 11.

[0041] Embodiment 2: Based on Embodiment 1, the following technical features are added.

[0042] Reference Figure 3 and Figure 4 An annular cooling channel 111 is provided in the transmission shaft 11, and both channel openings of the annular cooling channel 111 are located in the cooling water tank 6. A first one-way valve 112 and a second one-way valve 113 are respectively provided in the two channel openings of the annular cooling channel 111, and the first one-way valve 112 only allows the coolant from the outside to flow into the annular cooling channel 111, and the second one-way valve 113 only allows the coolant in the annular cooling channel 111 to flow out to the outside.

[0043] Reference Figure 3 and Figure 4 When the cooling water flows into the cooling water tank 6, the cooling water will flow into the annular cooling channel 111 through the first one-way valve 112, and then flow out of the annular cooling channel 111 through the second one-way valve 113. When the cooling water flows in the annular cooling channel 111, it will take away the heat of the transmission shaft 11, thereby further preventing the transmission shaft 11 from overheating.

[0044] Embodiment 3: Based on Embodiment 1, the following technical features are added.

[0045] Reference Figure 5 A plurality of heat sinks 7 are fixedly connected to the transmission shaft 11, the plurality of heat sinks 7 are annularly distributed on the transmission shaft 11, and the plurality of heat sinks 7 are all located in the cooling box. The plurality of heat sinks 7 are all inclined, and the plurality of heat sinks 7 and the transmission shaft 11 form an impeller structure.

[0046] Reference Figure 5 When the transmission shaft 11 rotates, it will drive several heat dissipation fins 7 to rotate together, thereby playing the role of a water pump, drawing external cooling water into the cooling water tank 6 through the water inlet pipe 61, and then discharging the coolant that has absorbed a certain amount of heat from the cooling water tank 6 through the water outlet pipe 62, so that the circulation of cooling water is completed without the need for an external water pump.

[0047] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A high-temperature axial flow fan with a sealing device (4), comprising a heat insulating sleeve (1), wherein two ends of the heat insulating sleeve (1) are respectively provided with an impeller barrel (2) and a mounting seat (3), wherein a transmission shaft (11) and a bearing seat (12) are arranged inside the heat insulating sleeve (1), wherein the mounting seat (3) is provided with a motor (31) for driving the transmission shaft (11) to rotate, wherein a avoidance hole (13) is opened on the heat insulating sleeve (1), wherein one end of the transmission shaft (11) passes through the avoidance hole (13) and extends into the impeller barrel (2), and a fan blade (21) is arranged on the end of the transmission shaft (11) extending into the impeller barrel (2), wherein the fan blade (21) is arranged, wherein: An annular groove (14) is provided on the side wall of the avoidance hole (13), and a sealing device (4) is provided in the annular groove (14). The sealing device (4) comprises an annular packing (41) and an annular stopper (42). The annular packing (41) is sleeved on the outside of the transmission shaft (11), and a plurality of fixing blocks (5) are provided on one end of the annular packing (41) away from the bearing seat (12). A plurality of slots (15) for inserting the fixing blocks (5) are provided on the bottom wall of the annular groove (14), and the annular stopper (42) is provided on the heat insulation sleeve (1), and the annular stopper (42) is used to press the annular packing (41) into the annular groove (14).

2. A high-temperature axial flow fan with a sealing device (4) according to claim 1, characterized in that: A cooling water tank (6) is provided in the heat-insulating sleeve (1), the transmission shaft (11) passes through the cooling water tank (6), a water inlet pipe (61) and a water outlet pipe (62) are provided on the cooling water tank (6), and the annular stop block (42) is provided on the cooling water tank (6).

3. A high-temperature axial flow fan with a sealing device (4) according to claim 2, characterized in that: The cooling water tank (6) fits the inner wall of the heat insulation sleeve (1) close to the impeller, the cooling water tank (6) is connected to the heat insulation sleeve (1) by bolts, and the cooling water tank (6) is a copper water tank.

4. A high-temperature axial flow fan with a sealing device (4) according to claim 3, characterized in that: An annular cooling channel (111) is provided in the transmission shaft (11), and two channel openings of the annular cooling channel (111) are both located in the cooling water tank (6).

5. A high-temperature axial flow fan with a sealing device (4) according to claim 4, characterized in that: A first one-way valve (112) and a second one-way valve (113) are respectively disposed in the two channel openings of the annular cooling channel (111); the first one-way valve (112) only allows external cooling liquid to flow into the annular cooling channel (111), and the second one-way valve (113) only allows cooling liquid in the annular cooling channel (111) to flow out to the outside.

6. A high-temperature axial flow fan with a sealing device (4) according to claim 1, characterized in that: The plurality of fixing blocks (5) are conical in shape, and the diameter of the fixing blocks (5) gradually increases from an end away from the annular packing (41) to an end close to the annular packing (41).

7. A high-temperature axial flow fan with a sealing device (4) according to claim 2, characterized in that: A plurality of heat dissipation fins (7) are arranged on the transmission shaft (11); the plurality of heat dissipation fins (7) are distributed in an annular manner on the transmission shaft (11); and the plurality of heat dissipation fins (7) are all located in the cooling box.

8. A high-temperature axial flow fan with a sealing device (4) according to claim 7, characterized in that: The plurality of heat dissipation fins (7) are all arranged at an angle, and the plurality of heat dissipation fins (7) and the transmission shaft (11) form an impeller structure.

9. A high-temperature axial flow fan with a sealing device (4) according to any one of claims 1 to 8, characterized in that: The annular packing (41) is a high temperature resistant graphite packing.

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