Air-cooled follow-up load unit

Abstract

The utility model relates to the technical field of resistors, in particular to an air-cooled follow-up load unit, which comprises an air duct, a motor fixed on the air duct, a rotating shaft mounted on an output shaft of the motor, a supporting disc fixed on the rotating shaft, and a plurality of supporting fan blades fixed on the supporting disc in a spaced manner in the circumferential direction, the air duct is provided with an external liquid groove, and the outer end part of each supporting fan blade is provided with an external leading-out terminal inserted into the external liquid groove; the air duct is provided with an internal liquid receiving groove; an inner leading-out terminal inserted into the inner liquid receiving groove is arranged at the inner end part of each supporting fan blade; the supporting fan blades are insulators, each supporting fan blade is wound with a resistance wire, and the two ends of each resistance wire are connected with the outer leading-out terminal and the inner leading-out terminal of the corresponding supporting fan blade respectively, so that the resistance wires are electrically conducted through the conductive liquid. Compared with an existing load, the resistance wire is wound on the fan blades of the fan, the fan runs to drive the resistance wire to rotate, wind resistance is basically not generated on the fan, the requirement for the fan is lowered, and meanwhile the heat dissipation performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of resistance technology, specifically to an air-cooled follower load unit. Background Technology

[0002] Resistors typically have high power consumption and generate a significant amount of heat during operation, requiring a heat dissipation mechanism to dissipate this heat. Existing heat dissipation mechanisms generally fall into two categories: air cooling and water cooling. Air cooling uses a fan to blow air towards the resistive element, dissipating the heat generated by the element into the air. Traditionally, to meet different heat dissipation requirements, different fan speeds are selected based on calculations. According to the law of conservation of energy: energy generated by the resistive element = energy absorbed by the resistor + heat carried away by the air, a fan with an appropriate airflow can be chosen to achieve the desired cooling effect. However, the cost of the fan increases with its power, and high-power fans consume a large amount of electricity. Water cooling involves placing water pipes around the electronic components, with circulating water carrying away the heat.

[0003] For example, Chinese patent document CN107301908B discloses a resistor with coupled air and water cooling for heat dissipation. It includes a resistance box and multiple parallel resistance tubes disposed within the resistance box. Each resistance tube includes a sleeve and a resistance wire passing through the sleeve. The resistance wire is insulated from the sleeve, and both ends of the resistance tube extend outside the resistance box and serve as connection points. The resistance tubes are insulated from and sealed to the resistance box. The resistor also includes an air-cooling mechanism that blows air onto the resistance tubes and a water-cooling mechanism that sprays water into the resistance tubes inside the resistance box. Compared to existing technologies, by using a sleeve to cover the waterproof resistance wire and having both ends of the resistance tube extend outside the resistance box as connection points, the air-cooling mechanism can spray water into the resistance box. The water is sprayed directly onto the resistance tubes, and combined with the air blowing from the air-cooling mechanism, the water on the surface of the resistance tubes evaporates more quickly, thus accelerating the removal of heat generated by the resistance tubes. This results in better heat dissipation and eliminates the need for the sophisticated water-cooling equipment required in traditional methods, significantly reducing costs.

[0004] With the development of electronic power technology, the requirements for loads are increasing, and the requirements for loads are becoming more and more demanding, especially in terms of heat dissipation, with a growing pursuit of high-power, small-size structures. Summary of the Invention

[0005] In view of the above-mentioned technical problems, the present invention provides an air-cooled follow-up load unit.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A wind-cooled servo load unit is provided, including a fan duct, a motor fixed to the fan duct, a rotating shaft mounted on the output shaft of the motor, a support plate fixed to the rotating shaft, and multiple support fan blades fixed to the support plate in a circumferentially spaced manner.

[0008] Inside the air duct, at the outer end of the supporting fan blades, there is an annular external liquid tank for holding conductive liquid. At the outer end of each supporting fan blade, there is an external lead-out terminal that can be inserted into the external liquid tank. Inside the air duct, at the inner end of the supporting fan blades, there is an internal liquid tank for holding conductive liquid. At the inner end of each supporting fan blade, there is an internal lead-out terminal that can be inserted into the internal liquid tank.

[0009] The supporting fan blades are insulators, and each supporting fan blade is wound with a resistance wire. The two ends of the resistance wire are connected to the outer lead-out terminal and the inner lead-out terminal of the supporting fan blade, respectively, so that the resistance wires are electrically connected to each other through the conductive liquid.

[0010] As a further alternative, the rotating shaft is arranged vertically, the support plate is arranged horizontally, and the openings of the external liquid tank and the internal liquid tank face upwards.

[0011] As a further alternative, the external liquid tank is annular and the internal liquid tank is cylindrical.

[0012] As a further optional solution, the internal lead-out terminals are arranged coaxially with the rotating shaft.

[0013] As a further alternative, the external terminal is in the shape of an arc plate, and its curvature is the same as that of the side wall of the external liquid tank.

[0014] As a further alternative, the resistance wire is spirally wound around the outside of the supporting fan blades.

[0015] As a further alternative, thermally conductive adhesive is provided on the outside of the supporting fan blades to wrap the resistance wire; or the resistance wire is exposed to the air.

[0016] As a further option, the shaft is also fixed with multiple auxiliary fan blades, which are located above the supporting fan blades to rotate and blow air toward the supporting fan blades.

[0017] As a further alternative, the internal and / or external leads are cylindrical.

[0018] As a further optional solution, a base frame is also included, with an external liquid tank and an internal liquid tank fixed to the base frame, which is fixed to the bottom of the air duct.

[0019] The beneficial effects of this utility model are:

[0020] This utility model discloses a wind-cooled follow-up load unit. Compared with existing loads, the resistance wire is wound on the fan blades. When the fan runs, it drives the resistance wire to rotate, which greatly increases the heat dissipation of the resistance wire and greatly increases the power density of the resistance wire. Compared with traditional wind-cooled loads, it basically does not generate wind resistance for the fan, reduces the requirements for the fan, and increases the heat dissipation performance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an air-cooled servo load unit in one of the embodiments.

[0022] Figure 2 This is a cross-sectional view of an air-cooled servo load unit in one of the embodiments.

[0023] Figure 3 This is a partial structural schematic diagram of an air-cooled servo load unit in one of the embodiments.

[0024] Figure 4 This is a schematic diagram of the structure of the base frame, external liquid tank, and internal liquid tank in the embodiment.

[0025] Figure label:

[0026] 1. Air duct; 2. Motor; 3. Shaft; 4. Support plate; 5. Support fan blades; 6. External liquid tank; 7. External lead-out terminal; 8. Internal liquid tank; 9. Internal lead-out terminal; 10. Base frame. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] This embodiment provides an air-cooled servo load unit, such as... Figures 1 to 4 As shown, the device includes a circular air duct 1, a motor 2 fixed at the center of the top of the air duct 1, a rotating shaft 3 mounted on the output shaft of the motor 2, a support plate 4 fixed to the rotating shaft 3, and multiple support fan blades 5 circumferentially separated and fixed to the support plate 4. Inside the air duct 1, corresponding to the outer end of each support fan blade 5, there is an annular external liquid tank 6 for holding conductive liquid. The outer end of each support fan blade 5 has an external lead-out terminal 7 that inserts into the external liquid tank 6. Inside the air duct 1, corresponding to the inner end of each support fan blade 5, there is an internal liquid tank 8 for holding conductive liquid. The inner end of each support fan blade 5 has an internal lead-out terminal 9 that inserts into the internal liquid tank 8. The support fan blades 5 are insulators made of high-temperature resistant plastic. Each support fan blade 5 is wound with a resistance wire, and the two ends of the resistance wire are respectively connected to the external lead-out terminal 7 and the internal lead-out terminal 9 of the support fan blade 5, thereby allowing the resistance wires to conduct electricity in parallel through the conductive liquid.

[0029] Compared with existing loads, the resistance wire of this load resistor unit is wound around the support blade 5 of the fan. The operation of the fan will drive the resistance wire on the support blade 5 to rotate around the shaft 3, which greatly enhances the heat dissipation effect of the resistance wire and greatly increases the power density of the resistance wire. Traditional air-cooled loads create a lot of wind resistance for the fan, which is not conducive to heat dissipation and also puts high demands on the performance of the fan. However, the improved structure of this embodiment basically does not generate wind resistance for the fan, reduces the requirements for the fan, and increases the heat dissipation performance.

[0030] Specifically, the rotating shaft 3 is arranged vertically, the support plate 4 is arranged horizontally, and the openings of the external liquid tank 6 and the internal liquid tank 8 face upwards. The external liquid tank 6 is annular, and the internal liquid tank 8 is cylindrical with a closed bottom and an open top. The internal lead-out terminal 9 is arranged coaxially with the rotating shaft 3. The internal lead-out terminal 9 and the external lead-out terminal 7 are cylindrical.

[0031] In practice, the external terminal can be modified to be an arc-shaped plate with the same curvature as the side wall of the external liquid tank 6, increasing the contact area and preventing conductive liquid from splashing to some extent. Alternatively, the external terminal can be made into a blade shape with the blade facing the rotation direction of the supporting fan blade 5.

[0032] In this embodiment, the resistance wire is spirally wound around the support fan blade 5. Thermally conductive adhesive is provided on the outside of the support fan blade 5 to wrap the resistance wire; or the resistance wire is exposed to the air.

[0033] In practice, multiple auxiliary fan blades (not shown in the figure) can be fixed on the rotating shaft 3. The auxiliary fan blades are located above the supporting fan blade 5 so that they rotate to blow air toward the supporting fan blade 5, which can keep the fan blades dry.

[0034] In this embodiment, a base frame 10 is also included, with an external liquid tank 6 and an internal liquid tank 8 fixed to the base frame 10, which is then fixed to the bottom of the air duct 1. During installation, these three components are first fixed as a whole, and then installed onto the air duct 1.

[0035] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A wind-cooled servo load unit, characterized in that: It includes a duct (1), a motor (2) fixed to the duct (1), a rotating shaft (3) installed on the output shaft of the motor (2), a support plate (4) fixed to the rotating shaft (3), and multiple support fan blades (5) fixed to the support plate (4) in a circumferentially separated manner; Inside the air duct (1), corresponding to the outer end of the supporting fan blade (5), there is an annular external liquid tank (6) for holding conductive liquid. The outer end of each supporting fan blade (5) is provided with an external lead-out terminal (7) that is inserted into the external liquid tank (6). Inside the air duct (1), corresponding to the inner end of the supporting fan blade (5), there is an internal liquid tank (8) for holding conductive liquid. The inner end of each supporting fan blade (5) is provided with an internal lead-out terminal (9) that is inserted into the internal liquid tank (8). The supporting fan blade (5) is an insulator. Each supporting fan blade (5) is wound with a resistance wire. The two ends of the resistance wire are respectively connected to the outer lead-out terminal (7) and the inner lead-out terminal (9) of the supporting fan blade (5), so that the resistance wires are electrically connected to each other through the conductive liquid.

2. The air-cooled servo load unit according to claim 1, characterized in that: The rotating shaft (3) is arranged vertically, the support plate (4) is arranged horizontally, and the openings of the external liquid tank (6) and the internal liquid tank (8) face upward.

3. The air-cooled servo load unit according to claim 2, characterized in that: The external liquid tank (6) is circular, and the internal liquid tank (8) is cylindrical.

4. The air-cooled servo load unit according to claim 3, characterized in that: The internal lead-out terminal (9) is arranged coaxially with the rotating shaft (3).

5. The air-cooled servo load unit according to claim 3, characterized in that: The external terminal is in the shape of an arc plate, and its curvature is the same as that of the side wall of the external liquid tank (6).

6. The air-cooled servo load unit according to claim 1, characterized in that: The resistance wire is spirally wound around the support fan blade (5).

7. A wind-cooled servo load unit according to claim 1 or 5, characterized in that: The outer side of the supporting fan blade (5) is provided with thermally conductive adhesive to wrap the resistance wire; or the resistance wire is exposed to the air.

8. The air-cooled servo load unit according to claim 1, characterized in that: The rotating shaft (3) is also fixed with multiple auxiliary fan blades, which are located above the supporting fan blades (5) to rotate and blow air toward the supporting fan blades (5).

9. The air-cooled servo load unit according to claim 1, characterized in that: The internal lead-out terminal (9) and / or the external lead-out terminal (7) are cylindrical.

10. The air-cooled servo load unit according to claim 1, characterized in that: It also includes a base frame (10), an external liquid tank (6) and an internal liquid tank (8) fixed to the base frame (10), and the base frame (10) fixed to the bottom of the air duct (1).

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