Wind tunnel power device with motor heat dissipation air duct

Abstract

The utility model relates to a wind tunnel power device with a motor heat dissipation air duct, belongs to the technical field of wind tunnel systems, and solves the problem of poor heat dissipation effect of a wind tunnel motor in the prior art. The device comprises a hole body, a fairing located in the hole body, a motor located in the fairing and an exhaust duct located outside the hole body. A plurality of rotation stopping pieces are evenly distributed on the peripheral face of the fairing in the circumferential direction, and the outer end of each rotation stopping piece is fixedly connected with the inner wall of the hole body. The rotation stopping piece is of a hollow structure, an air channel is formed in the rotation stopping piece, and the outside of the hole body can communicate with the inside of the fairing; the air channels in part of the rotation stopping pieces are communicated with the exhaust air channel, and the air channels in the rest of the rotation stopping pieces are directly communicated with the outside. According to the wind tunnel motor, air is introduced into the fairing from the outside to dissipate heat of the motor by adopting the partially hollow rotation stopping sheet, and the air in the fairing is discharged to the outside by utilizing the other partially hollow rotation stopping sheet, so that the heat dissipation effect of the wind tunnel motor is improved.

Description

Technical Field

[0001] This utility model relates to the field of wind tunnel system technology, and in particular to a wind tunnel power device with a motor cooling air duct. Background Technology

[0002] Typical low-speed wind tunnels often use axial fans for drive, with the main motor installed inside the shroud. This always leads to heat dissipation issues for the main motor. Part of the motor's heat comes from within itself, as the electrical energy it generates is converted into heat and transferred to the shroud. On the other hand, the fan's work on the airflow raises the temperature of the airflow within the tunnel, hindering heat dissipation from the motor. Currently, most low-speed wind tunnels use only their own built-in cooling fans for their axial motors, resulting in poor cooling performance. Utility Model Content

[0003] Based on the above analysis, the present invention aims to provide a wind tunnel power device with a motor cooling duct to solve the problem of poor heat dissipation effect of wind tunnel motors in the prior art.

[0004] On one hand, this utility model provides a wind tunnel power device with a motor cooling duct, including a tunnel body, a shroud located inside the tunnel body, a motor located inside the shroud, and an exhaust duct located outside the tunnel body; the outer circumferential surface of the shroud is evenly distributed with multiple anti-spinning plates, and the outer end of each anti-spinning plate is fixedly connected to the inner wall of the tunnel body; the anti-spinning plate has a hollow structure, and the interior of the anti-spinning plate forms an air channel, which can connect the outside of the tunnel body with the interior of the shroud; some of the air channels inside the anti-spinning plates are connected to the exhaust duct, and the remaining air channels inside the anti-spinning plates are directly connected to the outside.

[0005] Furthermore, the fairing includes a head cover, a tail cover, and fan blades disposed between the head cover and the tail cover, the fan blades being driven to rotate by the motor.

[0006] Furthermore, the cavity has a first opening at the position where it connects with the anti-rotation plate, and the tail cover has a second opening at the position where it connects with the anti-rotation plate.

[0007] Furthermore, a tail cover support is also provided on the tail cover, and the tail cover is fixed in the cavity by the tail cover support.

[0008] Furthermore, the tail cover support is a hollow structure, and the interior of the tail cover support forms an auxiliary air channel.

[0009] Furthermore, the exhaust duct includes a confluence section, which includes a housing that engages with the outer wall of the cavity.

[0010] Furthermore, the exhaust duct also includes a connecting section, which is disposed on one side of the confluence section.

[0011] Furthermore, a power source is installed inside the exhaust duct.

[0012] Furthermore, the anti-rotation plate is provided in 6-8 pieces.

[0013] Furthermore, a dust cover or filter screen is provided at the first opening.

[0014] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0015] (1) This utility model ingeniously utilizes the anti-rotation plate of the fairing as the air inlet and outlet of the exhaust duct, which connects the air inside the fairing with the external environment, thereby dissipating the heat accumulated inside the fairing. The airflow first enters the fairing chamber through part of the first opening and the anti-rotation plate, and after fully contacting and mixing with the motor heat sink, it is discharged from the anti-rotation plate and another part of the first opening, and then discharged to the atmosphere through the exhaust duct by a centrifugal fan and other devices. The duct layout is reasonable and the pressure loss is low.

[0016] (2) This utility model can be applied to most low-speed wind tunnels, is easy to design and implement, and can effectively reduce the pressure loss of the exhaust duct and improve the heat dissipation efficiency.

[0017] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0018] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0019] Figure 1 This is a schematic diagram of the structure of a wind tunnel power device with a motor cooling duct according to the present invention;

[0020] Figure 2 for Figure 1 Sectional view along axis AA;

[0021] Figure 3 This is a schematic diagram of the tail cover portion of a wind tunnel power device with a motor cooling duct according to the present invention.

[0022] Figure label:

[0023] 1-Head cover; 2-Tail cover; 3-Fan blade; 4-Head cover support; 5-Anti-rotation plate; 6-Tail cover support; 7-Motor; 8-Centrifugal fan; 9-Cavity body; 10-Exhaust duct; 11-First opening; 12-Second opening. Detailed Implementation

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0025] Example 1

[0026] A specific embodiment of this utility model is as follows: Figure 1 , Figure 2 As shown, a wind tunnel power device with a motor cooling air duct is disclosed.

[0027] See Figure 1 The wind tunnel power unit with motor cooling duct in this embodiment includes a tunnel body 9, a shroud located inside the tunnel body 9, a motor 7 located inside the shroud, and an exhaust duct 10 located outside the tunnel body 9. Figure 1 The arrows in the diagram indicate the direction of gas flow inside the wind tunnel.

[0028] The tunnel body 9 is cylindrical. The fairing includes a head cover 1, a tail cover 2, and fan blades 3 disposed between the head cover 1 and the tail cover 2. The head cover 1 and the tail cover 2 adopt conventional structural forms in the art. The head cover 1 is fixed inside the tunnel body 9 by a head cover support 4, and the tail cover 2 is fixed inside the tunnel body 9 by a tail cover support 6. The central axes of the head cover 1 and the tail cover 2 coincide with the central axis of the tunnel body 9. The fan blades 3 are located between the head cover 1 and the tail cover 2. The fan blades 3 adopt conventional structural forms in the art and can be driven by a motor 7 to rotate around the central axis of the tunnel body 9. The airflow in the wind tunnel first flows through the head cover 1 of the fairing, and after being pressurized by the fan blades 3, it flows through the anti-rotation plate 5 and the tail cover 2.

[0029] See Figure 2 Multiple anti-spin plates 5 are evenly distributed circumferentially on the outer peripheral surface of the tail cover 2. The outer end of each anti-spin plate 5 is fixedly connected to the inner wall of the cavity 9, and the inner end is fixedly connected to the outer peripheral surface of the tail cover 2. In this embodiment, the anti-spin plate 5 has a hollow structure, and the interior of the anti-spin plate 5 forms an air channel, which can connect the outside of the cavity 9 with the interior of the fairing. The exhaust duct 10 is connected to the air channel inside part of the anti-spin plate 5.

[0030] Specifically, the cavity 9 has a first opening 11 at the position where it connects with the anti-rotation plate 5, and the tail cover 2 has a second opening 12 at the position where it connects with the anti-rotation plate 5. The exhaust duct 10 is connected to a portion of the plurality of first openings 11.

[0031] Figure 2 The arrows in the diagram indicate the direction of gas flow, such as... Figure 2 As shown, external gas can enter the air passage inside the corresponding anti-rotation plate 5 through the first opening 11 which is not connected to the exhaust duct 10, and then enter the interior of the rectifier through the second opening 12 of the anti-rotation plate 5 to cool the motor 7. After that, it enters the air passage inside the corresponding anti-rotation plate 5 through the second opening 12 of the anti-rotation plate 5 which is connected to the exhaust duct 10, and then flows into the exhaust duct 10 through the first opening 11.

[0032] A power source is installed inside the exhaust duct 10. Preferably, the power source is a centrifugal fan 8. The centrifugal fan 8, as the power source of the exhaust duct 10, draws in the high-temperature air from the rectifier and discharges it to the atmosphere, thereby achieving heat transfer. The power source can also be an axial flow fan or other power sources that generate air pressure.

[0033] Generally, there are 6-8 anti-rotation plates. In this embodiment, there are 7 anti-rotation plates.

[0034] Correspondingly, the exhaust duct 10 is connected to approximately half of the plurality of first openings 11, for example, to 3-4 first openings 11. In this embodiment, the exhaust duct 10 is connected to 3 first openings 11. This arrangement ensures that the total cross-sectional areas of the intake and exhaust channels are substantially equal, thereby ensuring that the intake and exhaust velocities are equal and preventing changes in air pressure within the fairing.

[0035] See Figure 2 , Figure 3 The cross-sectional area of ​​the air passage inside the anti-rotation plate 5 can be gradually varied or constant along the radially outward direction. The anti-rotation plate 5 can be a thin-walled part, and its wall thickness remains constant for ease of processing. In this case, the shape of the air passage inside the anti-rotation plate 5 changes with the shape of the anti-rotation plate 5. Alternatively, depending on actual needs, the cross-sectional area of ​​the air passage inside the anti-rotation plate 5 can be kept constant in the radially outward direction to obtain the desired intake / exhaust flow rate.

[0036] In a preferred embodiment, the exhaust duct 10 includes a confluence section that covers a portion of the first opening 11, such that the exhaust duct 10 is connected to a portion of the first opening 11 via the confluence section. Figure 2 As shown, the confluence section may include a shell that engages with the outer wall of the cavity 9, which covers approximately half of the first opening 11.

[0037] The exhaust duct 10 also includes a connecting section, which is located on one side of the confluence section. The connecting section is in fluid communication with the interior of the confluence section. The power source is located at the outlet end of the connecting section.

[0038] In a preferred embodiment, a dust cover or filter is provided at the first opening 11. The dust cover or filter can block impurities and dust in the outside air, protecting the motor 7 from damage.

[0039] Furthermore, the tail cover support 6 can also be a hollow structure, and the interior of the tail cover support 6 forms an auxiliary air channel. This auxiliary air channel also connects the outside world with the interior of the fairing, which can increase the total cross-sectional area of ​​the air intake channel and improve the heat dissipation capacity of the motor 7.

[0040] This invention utilizes the anti-rotation plate 5 of the fairing tail cover, which is made into a hollow structure to allow outside air to communicate with the air inside the fairing tail cover. Through the technical solution of this embodiment, the airflow performance inside the fairing can be effectively increased, achieving the purpose of heat dissipation for the motor 7 inside the wind tunnel.

[0041] In addition, various parameters of the air duct can be flexibly adjusted, including the number of anti-rotation plates 5, the size of the anti-rotation plates 5, the volume of the tail cover 2, and the cross-sectional dimensions of the connecting section of the exhaust air duct 10. This can minimize the pressure loss of the air duct and reduce the driving power of the exhaust air duct 10, so as to achieve the purpose of cooling the main motor of the wind tunnel using a smaller power fan.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wind tunnel power unit having a motor cooling air duct, characterised in that, The system includes a cavity, a fairing located inside the cavity, a motor located inside the fairing, and an exhaust duct located outside the cavity. Multiple anti-spin plates are evenly distributed circumferentially on the outer periphery of the fairing, and the outer end of each anti-spin plate is fixedly connected to the inner wall of the cavity. Each anti-spin plate has a hollow structure, and its interior forms an air channel that connects the outside of the cavity with the interior of the fairing. Some of the air channels inside the anti-spin plates are connected to the exhaust duct, while the remaining air channels inside the anti-spin plates are directly connected to the outside.

2. The wind tunnel power plant having a motor heat dissipation air duct according to claim 1, characterized in that, The fairing includes a head cover, a tail cover, and fan blades disposed between the head cover and the tail cover, the fan blades being driven to rotate by the motor.

3. The wind tunnel power plant having a motor heat dissipation air duct according to claim 2, characterized in that, The cavity has a first opening at the position where it connects with the anti-rotation plate, and the tail cover has a second opening at the position where it connects with the anti-rotation plate.

4. The wind tunnel power plant having a motor heat dissipation air duct according to claim 3, characterized in that, The tail cover is also provided with a tail cover support, and the tail cover is fixed in the cavity by the tail cover support.

5. The wind tunnel power plant having a motor heat dissipation air duct according to claim 4, characterized in that, The tail cover support is a hollow structure, and the interior of the tail cover support forms an auxiliary air channel.

6. The wind tunnel power plant having a motor heat dissipation air duct according to claim 1, characterized by, The exhaust duct includes a confluence section, which includes a shell that engages with the outer wall of the cavity.

7. The wind tunnel power plant having a motor heat dissipation air duct according to claim 6, characterized by, The exhaust duct also includes a connecting section, which is located on one side of the confluence section.

8. The wind tunnel power plant having a motor heat dissipation air duct according to claim 7, characterized by, A power source is installed inside the exhaust duct.

9. The wind tunnel power plant having motor heat dissipation air duct in accordance with claim 1, characterized by, The anti-rotation plate is provided in 6-8 parts.

10. The wind tunnel power plant having a motor heat dissipation air duct according to claim 3, characterized by, A dust cover or filter screen is provided at the first opening.

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