Dry-type transformer cross-flow cooling fan

Abstract

The utility model provides a kind of dry-type transformer cross-flow cooling fan, belong to cooling fan technical field, it solves the technical problem that the existing dry-type transformer cross-flow cooling fan air outlet angle and air outlet air duct are single, overall heat dissipation effect is poor.A kind of dry-type transformer cross-flow cooling fan, including fixed plate, two end plates connected in the both ends of fixed plate, fan motor fixedly connected in one side end plate inside and capacitor fixedly installed on the surface of end plate.In the utility model, by rotating and setting air outlet baffle above air outlet, the inside of air outlet is divided into two, so that air outlet becomes two air ducts, the thickness of air outlet curtain is increased, so that the coil in dry transformer can be evenly cooled, overall heat dissipation effect is good, and the air outlet of baffle air duct is folded upwards from air outlet, fan air outlet and horizontal angle is increased to 50~70 °, which is conducive to the smooth discharge of dry-type transformer heat upwards, and is more conducive to the heat dissipation of dry transformer.

Description

Technical Field

[0001] This utility model belongs to the field of cooling fan technology, and relates to a crossflow cooling fan, particularly a crossflow cooling fan for dry transformers. Background Technology

[0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, and CNC machinery. Simply put, a dry-type transformer is a transformer whose core and windings are not immersed in insulating oil. Its cooling methods are divided into natural air cooling and forced air cooling. Forced air cooling can improve the output capacity of the transformer. Forced air cooling often uses cross-flow cooling fans to cool the dry-type transformer. In most cases, the cross-flow cooling fans are placed at the bottom of the dry-type transformer. The air from the cross-flow cooling fans is blown into the cooling air passages inside the dry-type transformer from the bottom, thereby cooling the high-voltage and low-voltage coils and the core inside the dry-type transformer.

[0003] A search revealed a novel dry-type transformer crossflow cooling fan disclosed in Chinese patent literature [Application No.: CN202121468437.X; Publication No.: CN215007843U]. This fan includes a fan box, an air inlet, and fan blades. The front end of the fan box has an air inlet, the fan blades are installed inside the fan box, the top of the fan box has a cover plate, the top of the cover plate has an air outlet, a motor is installed on one side of the fan box, the drive shaft of the motor extends into the inside of the fan box and connects to one side of the fan blades, and replacement structures are provided on both sides of the top of the fan box.

[0004] Although the crossflow cooling fan disclosed in this patent facilitates maintenance and disassembly of the fan through a snap-fit ​​connection, the crossflow cooling fan has a small air volume and low air pressure, resulting in poor ventilation and heat dissipation. Moreover, the air outlet angle is relatively flat, which leads to poor heat dissipation of the dry transformer and easily causes high temperatures in the dry transformer and the internal equipment of the integrated machine, resulting in more malfunctions. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a cross-flow cooling fan for dry transformers. The technical problem this utility model aims to solve is: how to achieve a single air outlet angle and air outlet duct in a cross-flow cooling fan for dry transformers, resulting in poor overall heat dissipation.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A cross-flow cooling fan for a dry-type transformer includes a fixed plate, two end plates connected to both ends of the fixed plate, a fan motor fixedly connected inside one end plate, and a capacitor fixedly mounted on the surface of the end plate. The output end of the fan motor is fixedly connected to a fan wheel, which is rotatably connected between the two end plates. An air inlet is provided at the bottom of the fan wheel, and the air inlet is located at the bottom end of the fixed plate. An air outlet is provided at the top of the fixed plate.

[0008] The outer side of the wind turbine is provided with a volute arc plate, and the volute arc plate is fixedly connected to the inner side of the fixed plate. A protective plate is also fixedly connected to the inner wall of the fixed plate on the side away from the volute arc plate, and a wind baffle is fixedly connected to the top of the protective plate.

[0009] The wind baffle is located above the wind turbine, and an air outlet baffle is also provided above the wind turbine. The air outlet baffle is rotatably connected between the two end plates and is located inside the air outlet.

[0010] By adopting the above structure, the airflow inside the impeller can be precisely guided by the baffle plate and the volute arc plate, facilitating airflow through the outlet. Currently, the airflow angle of traditional dry-type transformer fans is relatively flat, generally between 35 and 45 degrees with the horizontal. The fan's airflow blows directly onto the iron core of the dry-type transformer, and only after refraction is it discharged upwards. This results in large airflow loss and is not conducive to the heat dissipation of the dry-type transformer, seriously affecting its use. However, by folding the airflow surface of the baffle plate upwards from the air outlet, the airflow angle between the fan and the horizontal is increased to 50 to 70 degrees, which is conducive to the smooth upward discharge of heat from the dry-type transformer and is more conducive to the heat dissipation of the dry-type transformer.

[0011] The outer wall of the end plate on the side away from the fan motor is fixedly connected to an electrical terminal, and the electrical terminal is electrically connected to the fan motor.

[0012] The above structure, through the connection between the impeller and the fan motor, ensures precise drive of the impeller. Specifically, the end of the impeller furthest from the motor is supported by a bearing, which is fitted into a recess in the end plate of the outer casing via a rubber sleeve. A rubber transmission disc is installed at the end of the impeller closest to the fan motor, with its inner hole fitted onto the motor shaft extension. This serves two purposes: supporting the impeller and driving its rotation via the motor, ensuring the quality of the impeller's rotation. The fan motor is a 2-pole motor with a speed of 2800 r / min, ensuring a large output air volume and air pressure from the impeller. Furthermore, rubber shock absorbers and rubber sleeves on the screws are used during installation to effectively reduce the transmission of fan motor vibration to the impeller housing. In addition, the impeller bearings use rubber sleeves, and the impeller transmission uses a specially designed rubber transmission disc to ensure the smooth rotation of the impeller.

[0013] A rotating rod is fixedly connected inside the air outlet baffle. The rotating rod is rotatably connected between two end plates. A worm gear is fixedly connected to the outer wall of the rotating rod, and the worm gear is located on the outside of the end plates.

[0014] The outer wall of the worm gear is meshed with a worm, and the two ends of the worm are rotatably connected to fixed seats, which are fixedly installed on the outer wall of the end plate.

[0015] One end of the worm gear is fixedly connected to the output end of a bidirectional motor, and the bidirectional motor is fixedly installed on the outer wall of the mounting base.

[0016] With the above structure, the worm gear and worm can drive the bidirectional motor to rotate the rod. Under the fixed action of the rotating rod and the air outlet baffle, the air outlet baffle rotates upward inside the air outlet, which increases the angle between the fan air outlet and the horizontal to 50-70°. This is beneficial for the heat of the dry-type transformer to be discharged upward smoothly, and is more conducive to the heat dissipation of the dry-type transformer.

[0017] The surface of the air outlet baffle is provided with two protruding arc-shaped ribs.

[0018] By adopting the above structure and setting the arc-shaped ribs, the contact area of ​​the air outlet on the surface of the air outlet baffle is increased. Moreover, by setting the air outlet baffle, the air outlet is divided into two, dividing the air outlet into inner and outer air channels, increasing the thickness of the air curtain, so that the inner and outer coils of the dry transformer can be evenly dissipated, resulting in good overall heat dissipation effect.

[0019] A protective net is fixedly connected to the top of the fixed plate, and the protective net is located above the air outlet.

[0020] With the above structure, the protective net is made of stainless steel strips welded together, which effectively improves the protection level of the fan casing and helps to extend the service life of the fan.

[0021] The protective plate is made of aluminum profile, and multiple elongated holes are equidistantly stamped on the surface of the protective plate.

[0022] By adopting the above structure and adding protective plates, the overall structural strength of the device is increased, ensuring the stability of the device's operation and effectively ensuring the smooth and reliable operation of the fan at high speeds.

[0023] Compared with the prior art, the present invention provides the following advantages for a dry-type transformer crossflow cooling fan:

[0024] In this invention, by rotating an air outlet baffle above the air outlet, the interior of the air outlet is divided into two, creating inner and outer air ducts. This increases the thickness of the air curtain, allowing for uniform heat dissipation of the inner and outer coils of the dry-type transformer, resulting in excellent overall heat dissipation. Furthermore, by folding the air outlet surface of the baffle upwards, the angle between the fan outlet and the horizontal is increased to 50-70°, which facilitates the upward discharge of heat from the dry-type transformer, further improving heat dissipation. This solves the heat dissipation problem of the photovoltaic energy storage device, reduces the equipment failure rate, and extends the service life of the photovoltaic energy storage device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a cross-flow cooling fan for a dry-type transformer according to this utility model.

[0026] Figure 2 This is a bottom view structural diagram of a cross-flow cooling fan for a dry-type transformer according to this utility model.

[0027] Figure 3 This is a side view of a cross-flow cooling fan for a dry-type transformer according to this utility model.

[0028] Figure 4 This utility model Figure 1 A magnified structural diagram at point A.

[0029] Figure 5 This is a schematic diagram of the air outlet baffle in this utility model.

[0030] In the picture:

[0031] 1. Fixing plate; 2. End plate; 3. Fan motor; 4. Capacitor; 5. Impeller; 6. Electrical terminal; 7. Air inlet; 8. Volute arc plate; 9. Protective plate; 10. Baffle plate; 11. Air outlet baffle; 12. Rotating rod; 13. Worm gear; 14. Worm; 15. Fixing base; 16. Bidirectional motor; 17. Protective net. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] Example

[0034] like Figures 1-4 As shown;

[0035] A cross-flow cooling fan for a dry-type transformer includes a fixed plate 1, two end plates 2 connected to both ends of the fixed plate 1, a fan motor 3 fixedly connected inside one end plate 2, a capacitor 4 fixedly mounted on the surface of the end plate 2, a fan wheel 5, a terminal block 6, an air inlet 7, a volute arc plate 8, a protective plate 9, a baffle plate 10, an air outlet baffle 11, a rotating rod 12, a worm gear 13, a worm 14, a fixed base 15, a bidirectional motor 16, and a protective net 17. The terminal block 6 is fixedly connected to the outer wall of the end plate 2 away from the fan motor 3, and the terminal block 6 is electrically connected to the fan motor 3. The fan wheel 5 is fixedly connected to the output end of the fan motor 3, and the fan wheel 5 is rotatably connected between the two end plates 2. An air inlet 7 is provided at the bottom of the fan wheel 5, and the air inlet 7 is located at the bottom end of the fixed plate 1. An air outlet is provided at the top end of the fixed plate 1. The connection between the impeller 5 and the fan motor 3 ensures precise drive of the impeller 5. Specifically, the end of the impeller 5 furthest from the fan motor 3 is supported by a bearing, which is fitted into a recess in the end plate 2 of the outer casing by a rubber sleeve. A rubber transmission disc is installed at the end of the impeller 5 closest to the fan motor 3, and its inner hole is fitted onto the bearing of the fan motor 3. This serves two purposes: supporting the impeller 5 and driving the fan motor 3 to rotate the impeller 5, ensuring the rotational quality of the impeller 5. The fan motor 3 is a 2-pole motor with a speed of 2800 r / min, ensuring that the impeller 5 outputs a large air volume and air pressure. Furthermore, rubber shock absorbers and rubber sleeves on the screws are used during installation to effectively reduce the transmission of vibration from the fan motor 3 to the impeller 5 housing. In addition, the bearing of the impeller 5 uses a rubber sleeve, and the transmission of the impeller 5 uses a specially designed rubber transmission disc to ensure the smooth rotation of the impeller 5.

[0036] A volute arc plate 8 is provided on the outer side of the impeller 5, and the volute arc plate 8 is fixedly connected to the inner side of the fixed plate 1. A protective plate 9 is also fixedly connected to the inner wall of the fixed plate 1 on the side away from the volute arc plate 8. The protective plate 9 is made of aluminum profile, and multiple elongated holes are equidistantly stamped on the surface of the protective plate 9. The setting of the protective plate 9 increases the overall structural strength of the device, ensures the stability of the device operation, and effectively ensures the smooth and reliable operation of the fan at high speed. The top of the protective plate 9 is fixedly connected to... A wind deflector 10 is provided above the impeller 5, and an air outlet baffle 11 is also provided above the impeller 5. The surface of the air outlet baffle 11 is provided with two protruding arc-shaped ribs. The air outlet baffle 11 is rotatably connected between the two end plates 2 and is located inside the air outlet. The arc-shaped ribs increase the contact area of ​​the air outlet on the surface of the air outlet baffle 11. Moreover, the air outlet baffle 11 divides the air outlet into two, separating the air outlet into inner and outer air ducts, thereby increasing the size of the air curtain. The thickness of the material ensures uniform heat dissipation for both the inner and outer coils of the dry-type transformer, resulting in excellent overall heat dissipation. A protective net 17 is fixedly connected to the top of the fixed plate 1, positioned above the air outlet. The protective net 17 is made of welded stainless steel strips, effectively improving the protection level of the fan casing and extending its service life. The baffle plate 10 and the volute arc plate 8 allow for precise guidance of the airflow from inside the impeller 5, facilitating efficient airflow through the outlet. The air is discharged from the vent. Currently, the air outlet angle of traditional dry-type transformer fans is relatively flat, generally between 35 and 45 degrees with the horizontal. The air from the fan blows directly onto the iron core of the dry-type transformer, and after refraction, it is discharged upwards. This results in large air volume loss and is not conducive to the heat dissipation of the dry-type transformer, which seriously affects the use of the dry-type transformer. However, by folding the 10 air-facing baffles upwards from the air outlet, the air outlet angle of the fan is increased to 50 to 70 degrees with the horizontal, which is conducive to the smooth upward discharge of heat from the dry-type transformer and is more conducive to the heat dissipation of the dry-type transformer.

[0037] A rotating rod 12 is fixedly connected inside the air outlet baffle 11. The rotating rod 12 is rotatably connected between two end plates 2. A worm gear 13 is fixedly connected to the outer wall of the rotating rod 12, and the worm gear 13 is located outside the end plate 2. A worm 14 is meshed with the outer wall of the worm gear 13, and fixed seats 15 are rotatably connected to both ends of the worm 14. The fixed seats 15 are fixedly installed on the outer wall of the end plate 2. In order to drive the worm 14, the output end of a bidirectional motor 16 is fixedly connected to one end of the worm 14, and the bidirectional motor 16 is fixedly installed on the outer wall of the fixed seat 15. Through the arrangement of the worm gear 13 and the worm 14, the bidirectional motor 16 can drive the worm 14 to realize the transmission of the rotating rod 12. Under the fixed action of the rotating rod 12 and the air outlet baffle 11, the air outlet baffle 11 is folded upward and rotated inside the air outlet, which increases the angle between the fan outlet and the horizontal to 50-70°, which is conducive to the smooth upward discharge of heat from the dry-type transformer and is more conducive to the heat dissipation of the dry-type transformer.

[0038] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A cross-flow cooling fan for a dry-type transformer, comprising a fixed plate (1), two end plates (2) connected to both ends of the fixed plate (1), a fan motor (3) fixedly connected inside one end plate (2), and a capacitor (4) fixedly mounted on the surface of the end plate (2), characterized in that: The output end of the fan motor (3) is fixedly connected to the impeller (5), and the impeller (5) is rotatably connected between the two end plates (2). The bottom of the impeller (5) is provided with an air inlet (7), and the air inlet (7) is opened at the bottom of the fixed plate (1). The top of the fixed plate (1) is provided with an air outlet. The outer side of the wind turbine (5) is provided with a volute arc plate (8), and the volute arc plate (8) is fixedly connected to the inner side of the fixed plate (1). The inner wall of the fixed plate (1) away from the volute arc plate (8) is also fixedly connected with a protective plate (9), and the top of the protective plate (9) is fixedly connected with a wind baffle (10). The wind baffle (10) is located above the wind wheel (5), and an air outlet baffle (11) is also provided above the wind wheel (5). The air outlet baffle (11) is rotatably connected between the two end plates (2), and the air outlet baffle (11) is located inside the air outlet.

2. The dry-type transformer crossflow cooling fan according to claim 1, characterized in that: A power terminal (6) is fixedly connected to the outer wall of the end plate (2) on the side away from the fan motor (3), and the power terminal (6) is electrically connected to the fan motor (3).

3. The dry-type transformer crossflow cooling fan according to claim 1, characterized in that: The air outlet baffle (11) is fixedly connected to a rotating rod (12), which is rotatably connected between two end plates (2). The outer wall of the rotating rod (12) is fixedly connected to a worm gear (13), and the worm gear (13) is located on the outside of the end plate (2). The outer wall of the worm wheel (13) is meshed with a worm (14), and the two ends of the worm (14) are rotatably connected to a fixed seat (15), which is fixedly installed on the outer wall of the end plate (2). One end of the worm (14) is fixedly connected to the output end of the bidirectional motor (16), and the bidirectional motor (16) is fixedly installed on the outer wall of the fixed base (15).

4. A cross-flow cooling fan for a dry-type transformer according to claim 3, characterized in that: The surface of the air outlet baffle (11) is provided with two protruding arc-shaped ribs.

5. A cross-flow cooling fan for a dry-type transformer according to claim 1, characterized in that: The top of the fixed plate (1) is fixedly connected to a protective net (17), and the protective net (17) is located above the air outlet.

6. A cross-flow cooling fan for a dry-type transformer according to claim 1, characterized in that: The protective plate (9) is made of aluminum profile and has multiple elongated holes punched at equal intervals on its surface.

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