A plug-in high temperature fan

Abstract

The present application relates to the technical field of heat dissipation equipment, and discloses a plug-in high-temperature blower, including a heat-insulating shell and a lower shell, a cooling hood is provided at the bottom of the heat-insulating shell, an output shaft passes through the middle of the cooling hood, the heat-insulating shell is provided with an air inlet, and the vertical projection of the air inlet falls on one side of the cooling hood, and an air inlet hole is provided on the other side of the cooling hood. After the air enters the heat-insulating shell, it flows along the upper surface of the cooling hood to the air inlet hole, and then enters the cooling hood from the air inlet hole. The present invention is equipped with a plug-in high-temperature blower. No additional power is required, and the pressure difference between the inside and outside of the furnace is used to allow air to flow naturally into the furnace. The cooling gas flows horizontally to the output shaft, blocking the hot air in the furnace below, preventing the hot air from flowing through the shaft gap, reducing the contact area between the shaft and the hot air, and reducing the temperature of the output shaft. Secondly, the cooling gas flows from the inside of the output shaft to reduce the internal temperature of the output shaft.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation equipment, and in particular to a plug-in high-temperature fan. Background Art

[0002] High-temperature fans are used to transport high-temperature gases. Since they are in a high-temperature environment during operation, a cooling device is required to control the temperature of their output shaft. In reality, cooling is achieved by installing a liquid cooling device or an axial fan on the output shaft. Adding liquid cooling equipment will make the structure more complicated and increase equipment costs. When fan blades are added to the output shaft, when the fan is running, the fan blades rotate with the output shaft, driving the airflow along the output shaft. However, if the fan stops running, it will not play a cooling role, but the fan blades and output shaft are still in a high-temperature environment. The temperature will be transferred to the motor through the shaft, causing the motor and bearing temperatures to be too high. Summary of the invention

[0003] The present application proposes an insertable high-temperature blower, which does not require additional power and utilizes the pressure difference between the inside and outside of the furnace to allow air to flow naturally into the furnace, and the cooling gas flows horizontally to the output shaft. At the same time, the cooling gas flows horizontally to block the hot air in the furnace below, preventing the hot air from flowing through the shaft gap, thereby reducing the temperature of the output shaft.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an inserted high-temperature fan, comprising an insulation shell and a lower shell, the insulation shell and the lower shell are fixedly connected to form a whole, the insulation shell is filled with insulation material, a motor is fixedly mounted on the insulation shell, the motor is connected to an output shaft, the output shaft passes through the insulation shell and extends into the lower shell, the output shaft is fixedly connected to fan blades, a cooling hood is provided at the bottom of the insulation shell, the output shaft passes through the middle of the cooling hood, the insulation shell is provided with an air inlet, the vertical projection of the air inlet falls on one side of the cooling hood, and an air inlet hole is provided on the other side of the cooling hood. After entering the insulation shell, the air flows along the upper surface of the cooling hood to the air inlet hole, and then enters the cooling hood from the air inlet hole.

[0005] Furthermore, the output shaft is hollow, and an air intake hole is provided on the top of the output shaft, and the air intake hole is connected to the inside of the output shaft.

[0006] Furthermore, the output shaft is connected to a heat rise chamber, which is inclined upward and extends to the inner circle of the fan blade. The heat rise chamber is filled with relatively high-density cooling gas to isolate the hot air and prevent the hot air from flowing back to the output shaft.

[0007] Furthermore, the air intake hole is arranged at the upper part of the heat preservation shell, and can directly inhale external air. The output shaft is connected with a heat riser, which bypasses the fan blades and passes through the heat preservation shell. The heat riser is provided with an exhaust hole corresponding to the position of the fan blades, and the exhaust hole is located at a position away from the fan blades. A control valve is provided at the end of the heat riser, and the control valve is opened when the motor is turned off and closed when the motor is working.

[0008] Furthermore, the control valve is a one-way valve, and the gas can only flow out.

[0009] Furthermore, the output shaft is connected to the heat rise chamber through a thermal insulation tube, the thermal insulation tube is made of a thermal insulation material, and the thermal insulation tube extends downward to the bottom of the fan blade.

[0010] Furthermore, the thermal insulation tube is fixedly mounted on the lower shell, and the thermal insulation tube is inserted into the output shaft from the bottom of the output shaft, with a gap being left between the thermal insulation tube and the output shaft.

[0011] Furthermore, an isolation tube is provided at the bottom of the output shaft, the isolation tube is made of a heat-insulating material, and the end of the insulation tube is not higher than the connection between the isolation tube and the output shaft.

[0012] Beneficial effects of the present invention:

[0013] The present application provides an insertable high-temperature blower that does not require additional power and utilizes the pressure difference between the inside and outside of the furnace to allow air to flow naturally into the furnace. The cooling gas flows horizontally along the output shaft, blocking the hot air in the furnace below, preventing the hot air from flowing through the shaft gap, reducing the contact area between the shaft and the hot air, and at the same time, taking away the heat from the outside of the output shaft to reduce the temperature of the output shaft.

[0014] The cooling gas flows from the inside of the output shaft to reduce the internal temperature of the output shaft. At the same time, when the cooling gas flows in the heat rise chamber or the heat rise tube, the temperature gradually increases and the density decreases. The hotter air flows upward, increasing the air flow rate in the output shaft and reducing the temperature of the shaft, so that the fan can adapt to higher temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute a part of the specification, illustrate the embodiments disclosed in the present application and, together with the description, serve to explain the principles of the embodiments disclosed in the present application.

[0016] The embodiments disclosed in the present application may be more clearly understood according to the following detailed description with reference to the accompanying drawings, in which:

[0017] Figure 1 It is a front view of the first embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present application;

[0019] Figure 3 This is a partial structural diagram of the second embodiment of the present application;

[0020] Figure 4 It is a front view of the second embodiment of the present application;

[0021] Figure 5 This is a front view of the third embodiment of the present application.

[0022] In the figure, 1 is a heat-insulating shell; 2 is a lower shell; 3 is a motor; 4 is a fan blade; 5 is an air inlet; 6 is a cooling cover; 7 is a heat-rising chamber; 8 is an air inlet; 9 is an output shaft; 10 is a heat-insulating tube; 11 is an air intake hole; 12 is a separation tube; 13 is a heat-rising tube; 14 is a control valve; and 15 is an exhaust hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Example

[0024] See also Figure 1-2 A plug-in high-temperature fan comprises a heat-insulating shell 1 and a lower shell 2, the heat-insulating shell 1 and the lower shell 2 are fixedly connected to form a whole, the lower shell 2 is inserted into the installation cavity reserved for the equipment, and is fixed to the equipment through the heat-insulating shell 1, the heat-insulating shell 1 can be sealed when fixed to the equipment, the heat-insulating shell 1 is filled with heat-insulating material, a motor 3 is fixedly installed on the heat-insulating shell 1, the motor 3 is connected to an output shaft 9, the output shaft 9 passes through the heat-insulating shell 1 and extends into the lower shell 2, the output shaft 9 is fixedly connected to a fan blade 4, and the fan blade 4 rotates as the output shaft 9 rotates.

[0025] A cooling cover 6 is provided at the bottom of the heat-insulating housing 1, and an output shaft 9 passes through the middle of the cooling cover 6. An air inlet 5 is provided at the heat-insulating housing 1, and a vertical projection of the air inlet 5 falls on one side of the cooling cover 6. An air inlet hole 8 is provided on the other side of the cooling cover 6. Figure 1Due to the high temperature in the furnace and the low gas density, there is a large pressure difference with the external air. The pressure difference causes the normal temperature airflow to enter the heat preservation shell 1 from the air inlet 5, and flow to the air inlet 8 along the upper surface of the cooling cover 6, and then enter the cooling cover 6 from the air inlet 8. When the normal temperature airflow flows along the upper surface of the cooling cover 6 in the heat preservation shell 1, it takes away the heat of the cooling cover 6. The temperature in the area where the cooling cover 6 is located is relatively low, so when the airflow flows in the cooling cover 6, the temperature increases slowly when it flows horizontally, and the gas expands less, that is, the air pressure near the cooling cover 6 is The temperature of the cooling airflow is relatively low, and the cooling airflow preferentially flows laterally along the cooling hood 6, so that a high-density, low-temperature laminar flow is formed in the cooling hood 6. The laminar flow seals the upper space of the cooling hood 6, isolates the high-temperature airflow in the furnace, prevents the hot air from rising and flowing toward the shaft gap, shortens the contact area between the output shaft 9 and the high temperature, and reduces the heat transfer efficiency along the output shaft 9. At the same time, when the laminar flow flows through the output shaft 9, the output shaft 9 is cooled, and the temperature of the output shaft 9 is further reduced. On the other hand, the cooling airflow flowing in through the air inlet 5 is normal air supplement, and does not increase the burden on the fan. Example

[0026] On the basis of the first embodiment, in order to further improve the cooling capacity of the shaft to adapt to higher temperatures, in the second embodiment, please refer to Figure 3-Figure 4 The output shaft 9 is hollow, and an air intake hole 11 is provided on the top of the output shaft 9. The air intake hole 11 is connected to the inside of the output shaft 9. In the present embodiment, the air intake hole 11 is provided on the top of the cooling cover 6. When the cooling airflow flows inside the output shaft 9, the contact area between the low-temperature air and the output shaft 9 is increased, and more temperature is taken away. In other embodiments, the air intake hole 11 can be provided above the heat preservation shell 1 to directly inhale external air through the air intake hole 11.

[0027] The output shaft 9 is connected to a heat rise chamber 7, which is inclined upward and extends to the inner circle of the fan blade 4. The heat rise chamber 7 does not contact the fan blade 4. When the fan blade 4 rotates, the pressure near the fan blade 4 is lower, and the gas in the output shaft 9 is sucked to make the gas flow rapidly. When the heat rise chamber 7 does not rotate, the temperature in the heat rise chamber 7 is high and the density is low. The outside air enters the heat rise chamber 7. When flowing in the heat rise chamber 7, the temperature gradually increases and the density decreases. The gas naturally flows upward along the heat rise chamber 7, further reducing the pressure in the heat rise chamber 7 and increasing the flow rate of the cooling gas entering the output shaft 9. At the same time, the heat rise chamber 7 is filled with relatively high-density cooling gas to isolate the hot gas and prevent the hot gas from flowing back to the output shaft 9.

[0028] In order to install the heat rise chamber 7, the output shaft 9 needs to extend downward, which will increase the length of the output shaft 9 extending into the furnace and increase the heat absorption area. In order to reduce the length of the heat rise chamber 7, the output shaft 9 is connected to the heat rise chamber 7 through an insulation tube 10. The insulation tube 10 is made of insulation material and extends downward to the bottom of the fan blade 4. The heat rise chamber 7 is a good conductor of heat, and the insulation tube 10 can also isolate the heat absorbed by the heat rise chamber 7.

[0029] The heat rise chamber 7 and the insulation tube 10 are fixedly installed on the lower shell 2. The heat rise chamber 7 and the insulation tube 10 are fixedly connected to the lower shell 2 through a bracket. The heat rise chamber 7 and the insulation tube 10 do not rotate with the fan blades 4. The insulation tube 10 is inserted into the output shaft 9 from the bottom of the output shaft 9. A gap is left between the insulation tube 10 and the output shaft 9. When the fan is running, it is affected by the high temperature in the furnace and the temperature difference is large. The output shaft 9 and the insulation tube 10 are made of different materials and have different thermal expansion coefficients. A gap is left between the two to ensure the normal operation of the fan.

[0030] An isolation tube 12 is provided at the bottom of the output shaft 9. The isolation tube 12 is made of insulation material and is fixed at the end of the isolation tube 12. The connection between the two is not affected by thermal expansion and contraction. The end of the insulation tube 10 is not higher than the connection between the isolation tube 12 and the output shaft 9. The insulation tube 10 is likely to absorb part of the hot air in the furnace. The hot air flows along the gap between the insulation tube 10 and the isolation tube 12 and is absorbed at the end of the insulation tube 10. The upper part of the insulation tube 10 is blocked by the cooling air intake with relatively high density. The hot air does not directly contact the output shaft 9, thereby reducing the heat absorbed by the output shaft 9. Example

[0031] In some application scenarios, when the fan stops running, the air duct will be closed. At this time, as the outside air enters, the pressure in the furnace increases, and the outside air cannot be continuously inhaled to cool the shaft. Based on the second embodiment, the heat riser 13 is used to replace the heat riser chamber 7. Please refer to Figure 5 The air intake hole 11 is arranged at the upper part of the heat preservation shell 1, and can directly inhale the external air. The output shaft 9 is connected with the heat riser 13. The heat riser 13 bypasses the fan blade 4 and passes through the heat preservation shell 1. The heat riser 13 is provided with an exhaust hole 15 corresponding to the position of the fan blade 4. The exhaust hole 15 is located at a position opposite to the fan blade 4. When the fan blade 4 rotates, the high-speed airflow generates low pressure, sucks the cooling gas in the heat riser 13, and makes the cooling gas flow. The end of the heat riser 13 is provided with a control valve 14, and the control valve 14 is opened when the motor 3 is turned off. When the air duct is closed, the pressure in the furnace gradually increases, and the air inlet 5 cannot normally inhale air. At this time, the gas temperature of the heat riser 13 gradually increases, and the density decreases. The gas in the heat riser 13 flows upward under the action of buoyancy and is discharged from the control valve 14, so that the cooling gas flows normally.

[0032] The control valve 14 is a one-way valve, and the gas can only flow out but not in. When the fan blades 4 rotate, the pressure at the exhaust hole 15 is low, and the control valve 14 prevents external gas from flowing in. When the fan blades 4 do not rotate, the gas in the heat riser 13 can flow out through the control valve 14.

Claims

1. A plug-in high-temperature fan, comprising a heat-insulating shell (1) and a lower shell (2), the heat-insulating shell (1) and the lower shell (2) being fixedly connected to form a whole, the heat-insulating shell (1) being filled with heat-insulating material, a motor (3) being fixedly mounted on the heat-insulating shell (1), the motor (3) being connected to an output shaft (9), the output shaft (9) penetrating the heat-insulating shell (1) and extending into the lower shell (2), the output shaft (9) being fixedly connected to a fan blade (4), characterized in that: A cooling hood (6) is provided at the bottom of the heat-insulating shell (1), the output shaft (9) passes through the middle of the cooling hood (6), the heat-insulating shell (1) is provided with an air inlet (5), the vertical projection of the air inlet (5) falls on one side of the cooling hood (6), and an air inlet hole (8) is provided on the other side of the cooling hood (6). After entering the heat-insulating shell (1), the air flows along the upper surface of the cooling hood (6) to the air inlet hole (8), and then enters the cooling hood (6) from the air inlet hole (8); The output shaft (9) is hollow, and an air intake hole (11) is provided at the top of the output shaft (9). The air intake hole (11) is provided at the top of the cooling cover (6). The air intake hole (11) is communicated with the inside of the output shaft (9). The output shaft (9) is communicated with a heat rise chamber (7). The heat rise chamber (7) is obliquely upward and extends to the position where the inner ring of the fan blade (4) is located. The heat rise chamber (7) is filled with relatively high-density cooling gas to isolate the hot gas and prevent the hot gas from flowing back to the output shaft (9). The output shaft (9) is connected to the heat rise chamber (7) through a heat insulation pipe (10). The heat insulation pipe (10) is made of a heat insulation material. The heat insulation pipe (10) extends downward to the bottom of the fan blade (4).

2. The plug-in high-temperature fan according to claim 1, characterized in that: The thermal insulation tube (10) is fixedly mounted on the lower housing (2); the thermal insulation tube (10) is inserted into the output shaft (9) from the bottom of the output shaft (9); a gap is left between the thermal insulation tube (10) and the output shaft (9).

3. The plug-in high-temperature fan according to claim 2, characterized in that: An isolation tube (12) is provided at the bottom of the output shaft (9), the isolation tube (12) being made of a heat-insulating material, and the end of the heat-insulating tube (10) is not higher than the connection between the isolation tube (12) and the output shaft (9).

Images