Brake resistor device for electric wheel mine car cooled by centrifugal fan

Abstract

The utility model discloses a brake resistor device for an electric wheel mine car cooled by a centrifugal fan, which comprises a resistor box body, one end of the resistor box body is connected with a fan box body, and the other end of the resistor box body is provided with an air outlet screen plate; a double-shaft motor is arranged in the fan box body, and centrifugal fans are arranged at the two ends of the double-shaft motor respectively. Air inlet net plates are arranged on the side walls of the two sides of the fan box body correspondingly, and air inlet channels are formed in the inner sides of the air inlet net plates on the two sides correspondingly; the centrifugal fans at the two ends extend into the air inlet channels on the two sides correspondingly. According to the device, the air volume and the air pressure of the centrifugal fan are utilized to effectively take away heat generated in the mine car braking resistor box body, so that the temperature in the resistor box body can be quickly reduced, the braking resistor can meet the electric braking requirement of a high-power electric transmission system with the continuous power exceeding 4600kW, and the reliability and the stability of a braking system are kept.

Description

Technical Field

[0001] The utility model relates to the technical field of brake resistors for wheeled mining vehicles, in particular to a brake resistor device for electric wheeled mining vehicles cooled by a centrifugal fan. Background Art

[0002] Domestic mining dump trucks have generally been driven by high-power electric transmission systems with simple structure, strong power performance, high operating efficiency and easy control. At the same time, with the accumulation of domestic industry technology, high-power electric transmission systems have tended to be domestically produced and independently developed. Braking resistors, as key components of mining vehicle electric transmission systems, are of great significance to maintaining the smooth operation of mining vehicles.

[0003] In the related technology, the current brake resistors for mining vehicles are generally cooled by axial flow fans. In actual applications, the wind speed at the center of the axial flow fan impeller is relatively small, and the improvement of the wind speed uniformity by using the guide structure is very limited, resulting in the local temperature at the center of the resistor being too high. The stability of the brake resistors for mining vehicles cannot be guaranteed, affecting the braking effect of mining vehicles, and the heat dissipation requirements of high-power brake resistors with a continuous power of more than 4600kW cannot be met. Utility Model Content

[0004] The utility model aims to provide a brake resistor device for an electric wheel mining car cooled by a centrifugal fan, so as to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A brake resistor device for an electric wheel mining vehicle cooled by a centrifugal fan, comprising:

[0007] A resistor box, one end of which is connected to a fan box, and the other end of which is provided with an air outlet mesh plate;

[0008] A double-shaft motor is arranged in the fan housing, and centrifugal fans are arranged at both ends of the double-shaft motor;

[0009] The side walls of the fan box are respectively provided with air inlet mesh plates, and the inner sides of the air inlet mesh plates on both sides are respectively provided with air inlet ducts;

[0010] The centrifugal fans at both ends extend into the air inlet ducts at both sides respectively.

[0011] The brake resistor device for electric wheel mining vehicles cooled by a centrifugal fan according to this solution has at least the following technical effects:

[0012] The centrifugal fan-cooled electric wheel mine car brake resistor device utilizes the air volume and air pressure of the centrifugal fan to effectively remove the heat generated in the mine car brake resistor box, thereby quickly reducing the temperature in the resistor box, so that the brake resistor can meet the electric braking requirements of high-power electric transmission systems with a continuous power of more than 4600kW, and maintain the reliability and stability of the brake system.

[0013] As a further solution of the utility model: the fan housing is also provided with a plurality of guide plates.

[0014] Since the fan box is also provided with a number of guide plates, the direction of air flow can be guided so that the air entering the fan box can be more smoothly guided into the resistor box through the guide plates, further improving the heat dissipation effect of the resistor box; at the same time, the guide plates can reduce eddies and turbulence during air flow, reduce noise generated when the fan is working, and improve the working environment.

[0015] As a further solution of the utility model: the guide plate includes a first top arc plate and a first bottom arc plate, a second top arc plate and a second bottom arc plate.

[0016] The centrifugal fans at both ends of the dual-axis motor guide the air into the resistor box through the first top arc plate, the first bottom arc plate, the second top arc plate and the second bottom arc plate; this helps to accurately guide the air to the resistor box, further enhance the wind pressure and wind speed entering the resistor box, and improve the stability of heat dissipation and heat dissipation efficiency.

[0017] As a further solution of the utility model: the guide plate also includes a middle arc plate.

[0018] Since the guide plate also includes a middle arc plate, the middle arc plate helps to improve the circulation of air inside the fan box, and the middle arc plate is used in conjunction with other guide plates to make the air flow more uniform and stable, reduce dead corners, and improve the overall performance of the fan system.

[0019] As a further solution of the utility model: the guide plate also includes a side arc plate.

[0020] Since the guide plate also includes side arc plates, the smoothness of the airflow can be improved, the airflow distribution inside the fan case can be optimized, the fluctuation of the airflow and the generation of vortices can be reduced, and the instability that may be generated by the airflow during the flow process can be reduced. In addition, the side arc plates are used in conjunction with other guide plates to make the air flow more uniform and stable, thereby improving the overall performance of the fan system.

[0021] As a further solution of the utility model: the centrifugal fans at both ends of the dual-axis motor are of double-layer impeller structure.

[0022] Since the centrifugal fans at both ends of the dual-axis motor have a double-layer impeller structure, the double-layer impeller structure can increase the number of blades of the fan, effectively increase the contact area between the blades and the air, improve the efficiency of the fan, enhance the power and pressure of the airflow, and improve the wind output capacity of the centrifugal fan.

[0023] As a further solution of the utility model: the air inlet ducts on both sides are respectively provided with a first air inlet and a second air inlet, the front impellers of the centrifugal fans at both ends are respectively placed in the first air inlets on both sides, and the rear impellers of the centrifugal fans at both ends are respectively placed in the second air inlets on both sides.

[0024] By placing the front impellers of the centrifugal fans at both ends in the first air inlets on both sides respectively, and placing the rear impellers of the centrifugal fans at both ends in the second air inlets on both sides respectively, the airflow can be guided to the impellers more effectively, and the airflow first passes through the front impeller and then through the rear impeller, which can divert the airflow to balance the air pressure, which is beneficial to improving the wind output and stability of the fan, reducing the disturbance and resistance of the airflow, further increasing the wind pressure and wind speed entering the resistor box, and improving the heat dissipation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a three-dimensional structural schematic diagram of a brake resistor device for an electric wheel mining vehicle cooled by a centrifugal fan;

[0027] Figure 2 It is a three-dimensional structural schematic diagram of a brake resistor device for an electric wheel mining vehicle cooled by a centrifugal fan;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of a fan box of a brake resistor device for an electric wheel mining car cooled by a centrifugal fan;

[0029] Figure 4 It is a schematic diagram of the side view of the fan box of a brake resistor device for an electric wheel mining car cooled by a centrifugal fan;

[0030] Figure 5 It is a schematic diagram of the structure of a dual-axis motor of a brake resistor device for an electric wheel mining vehicle cooled by a centrifugal fan;

[0031] Figure 6 It is a schematic diagram of the air inlet structure of a brake resistor device for an electric wheel mining car cooled by a centrifugal fan;

[0032] Figure 7 The present invention is a schematic diagram of a brake resistor device for an electric wheel mining car cooled by a centrifugal fan.

[0033] Reference numerals:

[0034] 10. Resistor box; 101. Air outlet mesh plate; 20. Fan box; 201. Dual-axis motor; 202. Centrifugal fan; 203. Air inlet mesh plate; 204. Air inlet duct; 2041. First air inlet; 2042. Second air inlet; 301. First top arc plate; 302. First bottom arc plate; 303. Second top arc plate; 304. Second bottom arc plate; 305. Middle arc plate; 306. Side arc plates. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0041] like Figure 1-7 The embodiment of the utility model shown is a braking resistor device for an electric wheel mining car cooled by a centrifugal fan, comprising: a resistor box 10, one end of which is connected to a fan box 20, and the other end is provided with an air outlet mesh plate 101; a dual-axis motor 201 is provided in the fan box 20, and centrifugal fans 202 are respectively provided at both ends of the dual-axis motor 201; air inlet mesh plates 203 are respectively provided on both side walls of the fan box 20, and air inlet ducts 204 are respectively provided on the inner sides of the air inlet mesh plates 203 on both sides; the centrifugal fans 202 at both ends extend into the air inlet ducts 204 on both sides respectively.

[0042] When in use, the dual-axis motor 201 is started, and the motor shaft drives the centrifugal fans 202 at both ends to rotate, sucking air into the air inlet duct 204 through the air inlet mesh plates 203 on both sides of the fan box 20, and then entering the rotating impeller to form an airflow, and finally transporting the airflow to the resistor box 10, and discharging the heat generated by the resistor when working from the air outlet mesh plate 101 into the atmosphere.

[0043] Specifically, the centrifugal fan-cooled electric wheel mine car brake resistor device utilizes the air volume and wind pressure of the centrifugal fan 202 to effectively take away the heat generated in the mine car brake resistor box 10, thereby quickly reducing the temperature inside the resistor box 10, so that the brake resistor can meet the electric braking requirements of a high-power electric transmission system with a continuous power of more than 4600kW, and maintain the reliability and stability of the brake system.

[0044] like Figure 3 and Figure 4 As shown, the fan housing 20 is also provided with a plurality of guide plates.

[0045] Specifically, since the fan box 20 is also provided with a plurality of guide plates, the direction of air flow can be guided so that the air entering the fan box 20 can be more smoothly guided to the resistor box 10 through the guide plates, thereby further improving the heat dissipation effect of the resistor box 10; at the same time, the guide plates can reduce eddies and turbulence during air flow, reduce noise generated when the fan is working, and improve the working environment.

[0046] According to an embodiment of the present invention, the guide plate includes a first top arc plate 301 and a first bottom arc plate 302 , a second top arc plate 303 and a second bottom arc plate 304 .

[0047] Specifically, the centrifugal fans 202 at both ends of the dual-axis motor 201 guide the air into the resistor box 10 through the first top arc plate 301, the first bottom arc plate 302, the second top arc plate 303 and the second bottom arc plate 304; this helps to accurately guide the air to the resistor box, further enhance the wind pressure and wind speed entering the resistor box 10, and improve the stability of heat dissipation and the heat dissipation efficiency.

[0048] like Figure 3 As shown, the guide plate further includes a middle arc plate 305 .

[0049] Specifically, since the guide plate also includes a middle arc plate 305, the middle arc plate 305 helps to improve the circulation of air inside the fan box 20, and the middle arc plate 305 is used in conjunction with other guide plates to make the air flow more uniform and stable, reduce dead corners, and improve the overall performance of the fan system.

[0050] like Figure 3 As shown, the guide plate further includes a side arc plate 306 .

[0051] Since the guide plate also includes a side arc plate 306, the smoothness of the airflow can be improved, the airflow distribution inside the fan box 20 can be optimized, the fluctuation of the airflow and the generation of vortices can be reduced, and the instability that may be generated by the airflow during the flow process is reduced. In addition, by using the side arc plate 306 in conjunction with other guide plates, the air flow can be made more uniform and stable, thereby improving the overall performance of the fan system.

[0052] like Figure 5 As shown, the centrifugal fans 202 at both ends of the dual-axis motor 201 are both double-layer impeller structures.

[0053] Specifically, since the centrifugal fans 202 at both ends of the dual-axis motor 201 are double-layer impeller structures, the double-layer impeller structure can increase the number of blades of the fan, effectively increase the contact area between the blades and the air, improve the efficiency of the fan, enhance the power and pressure of the airflow, and improve the wind output capacity of the centrifugal fan 202.

[0054] like Figure 6 As shown, the air inlet ducts 204 on both sides are respectively provided with a first air inlet 2041 and a second air inlet 2042, the front impellers of the centrifugal fans 202 at both ends are respectively placed in the first air inlet 2041 on both sides, and the rear impellers of the centrifugal fans 202 at both ends are respectively placed in the second air inlet 2042 on both sides.

[0055] Specifically, by placing the front impellers of the centrifugal fans 202 at both ends in the first air inlets 2041 on both sides, and the rear impellers of the centrifugal fans 202 at both ends in the second air inlets 2042 on both sides, the airflow can be guided to the impellers more effectively, and the airflow first passes through the front impeller and then passes through the rear impeller, which can divert the airflow to balance the air pressure, which is beneficial to improving the wind output and stability of the fan, reducing the disturbance and resistance of the airflow, further increasing the wind pressure and wind speed entering the resistor box 10, and improving the heat dissipation capacity.

[0056] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A brake resistor device for an electric wheel mining car cooled by a centrifugal fan, characterized in that: include: A resistor box (10), wherein one end of the resistor box (10) is connected to a fan box (20), and the other end is provided with an air outlet mesh plate (101); A double-shaft motor (201) is arranged in the fan housing (20), and centrifugal fans (202) are respectively arranged at both ends of the double-shaft motor (201); The side walls of the fan housing (20) are respectively provided with air inlet mesh plates (203), and the inner sides of the air inlet mesh plates (203) on both sides are respectively provided with air inlet ducts (204); The centrifugal fans (202) at both ends extend into the air inlet ducts (204) at both sides respectively.

2. The brake resistor device for electric wheel mining vehicles cooled by centrifugal fans according to claim 1, characterized in that: The fan housing (20) is also provided with a plurality of guide plates.

3. The brake resistor device for electric wheel mining vehicles cooled by centrifugal fans according to claim 2, characterized in that: The guide plate comprises a first top arc plate (301) and a first bottom arc plate (302), a second top arc plate (303) and a second bottom arc plate (304).

4. The brake resistor device for electric wheel mining vehicles cooled by centrifugal fans according to claim 3, characterized in that: The guide plate also includes a middle arc plate (305).

5. The brake resistor device for electric wheel mining vehicles cooled by centrifugal fans according to claim 3, characterized in that: The guide plate further comprises a side arc plate (306).

6. The brake resistor device for electric wheel mining vehicles cooled by centrifugal fans according to claim 1, characterized in that: The centrifugal fans (202) at both ends of the dual-axis motor (201) are both double-layer impeller structures.

7. The brake resistor device for electric wheel mining vehicles cooled by centrifugal fans according to claim 5, characterized in that: The air inlet ducts (204) on both sides are respectively provided with a first air inlet (2041) and a second air inlet (2042); the front impellers of the centrifugal fans (202) on both sides are respectively placed in the first air inlets (2041) on both sides; and the rear impellers of the centrifugal fans (202) on both sides are respectively placed in the second air inlets (2042) on both sides.

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