Brake resistor device for electric locomotive

Abstract

The utility model discloses a brake resistor device for an electric locomotive, which relates to the technical field of electric locomotives and comprises a resistor cabinet, the resistor cabinet is formed by connecting five plates including a bottom frame, a left side plate, a right side plate, a front side plate and a rear side plate in a welding mode, and a top cover plate is fixedly arranged on the upper side face of the resistor cabinet. A resistor element is arranged in the resistor cabinet, a fan is fixedly arranged at one end of the resistor cabinet, an air outlet mesh enclosure is fixedly arranged at the other end of the resistor cabinet, and an air inlet mesh enclosure is fixedly arranged on the fan through a flange; eight groups of resistor elements are arranged, four second mica plates are arranged on the outer side of each group of resistor elements, and each group of resistor elements is formed by arranging a plurality of unit resistors in parallel and is matched with the resistor cabinet to form a double-layer heat insulation structure. The problems that in the prior art, a brake resistor device for an electric locomotive is large in size, complex in structure and not beneficial to installation and maintenance in an electric room of the locomotive are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric locomotives, in particular to a braking resistor device for electric locomotives. Background Art

[0002] With the rapid development of railway transportation, electric locomotives, as the primary power source, have a significant impact on the safety and efficiency of their braking systems. During regenerative braking, the electric motor generates excess electrical energy during deceleration. This energy must be converted into heat and effectively dissipated through a braking resistor to avoid damage to the electrical system.

[0003] However, due to the extremely compact dimensions of the locomotive electrical room and the complex structure of the vehicle body at the fan inlet, a brake resistor device with a small size, light weight, simple structure, easy installation and maintenance, and good heat dissipation is necessary. However, existing brake resistor devices for electric locomotives are large, heavy, complex, inconvenient to install and maintain, and their heat dissipation performance does not meet the requirements. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a brake resistor device for electric locomotives, which solves the problem that the brake resistor devices for electric locomotives in the prior art are large in size and complex in structure, making them difficult to install and maintain in the locomotive electrical room.

[0005] To achieve the above-mentioned purpose, the utility model proposes a braking resistor device for electric locomotives, including a resistor cabinet, which is composed of five plates including a base frame, a left side plate, a right side plate, a front side plate, and a rear side plate connected by welding. A top cover plate is fixedly provided on the upper side of the resistor cabinet, and a resistor element is provided in the resistor cabinet. A fan is fixedly provided at one end of the resistor cabinet, and an air outlet mesh cover is fixedly provided at the other end. An air inlet mesh cover is fixedly provided on the fan through a flange; eight groups of resistor elements are provided, four second mica plates are provided on the outside of each group of resistor elements, and each group of resistor elements is composed of a number of unit resistors arranged in parallel. Eight pairs of guide rail assemblies are symmetrically provided in the resistor cabinet, and the guide rail assemblies are fixedly connected to the left and right plates through insulators. The resistor elements are provided in the guide rail assemblies.

[0006] As a further solution of the present invention: two conical air guide rings are provided on the front side plate close to the fan, four first mica plates are fixedly connected around the front side plate close to the resistance element, the conical air guide ring and the first mica plates together form an air inlet transition duct, the two conical air guide rings are concentrically arranged, and the large opening of the conical ring faces the fan, and the small opening faces the resistance element.

[0007] As a further solution of the present invention: four of the first mica boards are fixedly connected to one side of the rear side panel to form an air outlet transition duct, and the other side is fixedly connected to the air outlet mesh cover.

[0008] As a further solution of the present invention: a large-line outlet box and a temperature control device are fixedly connected to the right side panel, a large-line outlet box cover is fixedly connected to the large-line outlet box, and a sealing gasket is provided on the large-line outlet box cover.

[0009] As a further solution of the present invention: a wiring copper bus, a wire terminal, and an external cable are provided in the large-line outlet box; the wiring copper bus is electrically connected to the resistance element; the end of the wiring copper bus is fixedly connected to the wire terminal; and the wire terminal is fixedly connected to the external cable.

[0010] As a further solution of the present invention: a plurality of drainage holes are provided on the base frame, and the second mica board provided on the resistance element, the first mica board on the front and rear transition air ducts, the top cover plate and the base frame form a double-layer insulation structure.

[0011] As a further solution of the present invention: a pair of hanging rings are fixedly installed on the left side plate and the right side plate, and a junction box is fixedly provided on the side of the fan.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. By setting up a fan, a resistor cabinet and a resistor element, and a double-layer insulation structure composed of a second mica plate set on the resistor element, a first mica plate on the front and rear transition air ducts, a top cover plate and a bottom frame, the air flow is first blown to the air inlet transition air duct through the rotation of the fan impeller. When the air flow passes through the conical air guide ring in the air inlet transition air duct for concentrating the air flow, the central area of ​​the resistor element where the heat is most concentrated can be cooled. The structure is simple, easy to install and convenient for heat dissipation.

[0014] 2. The resistance element of the braking resistor device adopts a modular design and a split pull-out disassembly and assembly method, which facilitates maintenance and replacement of damaged resistance elements.

[0015] 3. The resistor cabinet adopts an integrated panel frame structure, which enables the brake resistor to meet the lightweight design while ensuring the overall structural strength, thus extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the utility model without the top cover and the large line outlet box cover;

[0018] Figure 3 This is an explosion diagram of the utility model.

[0019] In the figure: 1. Fan; 2. Lifting ring; 3. Front side panel; 4. Left side panel; 5. Resistor; 501. Second mica board; 6. Top cover; 7. Rear side panel; 8. Air outlet grille; 9. Guide rail assembly; 10. Right side panel; 11. Large line outlet box; 12. Large line outlet box cover; 13. Temperature control device; 14. Insulator; 15. Base frame; 16. Air inlet grille; 17. Junction box; 18. First mica board; 19. Wiring busbar; 20. External cable; 21. Wire terminal. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figure 1-3 As shown, a braking resistor device for electric locomotives includes a resistor cabinet, which is made of five plates connected by welding: a base frame 15, a left side plate 4, a right side plate 10, a front side plate 3, and a rear side plate 7. A resistor element 5 is provided in the resistor cabinet. A fan 1 is fixedly provided at one end of the resistor cabinet, and an air outlet mesh cover 8 is fixedly provided at the other end. An air inlet mesh cover 16 is fixedly provided on the fan 1 via a flange. Excess electrical energy is converted into heat energy by the resistor element 5, and the fan 1 is started. The rotation of the impeller of the fan 1 causes air to pass through the air inlet mesh cover 16, the resistor cabinet, and the air outlet mesh cover 8, thereby accelerating the cooling of the resistor element 5. The purpose of providing the air inlet mesh cover 16 and the air outlet mesh cover 8 is to prevent mosquitoes from entering the interior of the resistor element 5, thereby further improving the overall safety of the device.

[0022] As an implementation method in this embodiment, two conical air guide rings are provided on the front side plate 3 near the fan side, and four first mica plates 18 are fixedly connected around the front side plate 3 near the resistor element 5 side. The conical air guide ring and the first mica plate 18 together form an air inlet transition duct. The two conical air guide rings are concentrically arranged, and the large opening of the conical ring faces the fan 1, and the small opening faces the resistor element 5. Four mica plates 18 are fixedly connected on one side of the rear side plate 7 to form an air outlet transition duct, and the other side is fixedly connected to the air outlet mesh cover 8. A large line outlet box 11 and a temperature control device 13 are fixedly connected to the right side plate 10. A large line outlet box cover 12 is fixedly connected to the large line outlet box 11. A sealing gasket is provided on the large line outlet box cover 12, and the material is EPDM. The large-line outlet box cover 12 is covered to achieve waterproof, dustproof and electric shock prevention. The large-line outlet box 11 is provided with a wiring copper bus 19, a wire terminal 21, and an external cable 20. The wiring copper bus 19 is electrically connected to the resistor element 5. The end of the wiring copper bus 19 is fixedly connected to the wire terminal 21. The wire terminal 21 adopts a narrow-head copper tube end. When installed, it is first crimped and fixed with the external cable 20, and then penetrated from the lower end of the large-line outlet box 11 and fixedly connected to the wiring copper bus 19, thereby realizing the electrical connection between the external system and the resistor element 5. The temperature control device 13 determines whether the resistor element 5 is over-temperature by the Wheat bridge temperature measurement principle. When over-temperature, a temperature control alarm signal is issued, and the vehicle can cut off the fault source in time. In this embodiment, the protection level of the large-line outlet box 11 and the temperature control device 13 reaches IP67;

[0023] As an implementation method in this embodiment, eight groups of resistor elements 5 are provided, of which the rightmost group is used to monitor temperature rise. Four second mica plates 501 are provided on the outside of each group of resistor elements 5. Each group of resistor elements 5 is composed of several unit resistors arranged in parallel. This arrangement allows the second mica plates 501 on the outside of each group of resistor elements 5 to connect to form a ventilation duct, which is connected to the front and rear transition ducts to form an integral ventilation duct. Eight pairs of guide rail assemblies 9 are symmetrically arranged in the resistor cabinet. The guide rail assemblies 9 are fixedly connected to the left plate 4 and the right plate 10 through insulators 14. Four rollers are provided on both sides of each group of resistor elements 5. Each group of resistor elements 5 is slid down into the guide rail assembly 9 via the rollers. Baffles are fixedly provided on the upper and lower parts of the guide rail assembly 9. When the resistor elements 5 need to be maintained and replaced, it is only necessary to remove the upper baffle of the guide rail assembly 9 and then pull the resistor elements 5 out from between the guide rail assemblies 9, which facilitates the installation and maintenance of the resistor elements 5.

[0024] As an implementation method in this embodiment, a top cover plate 6 is fixedly provided on the upper side of the resistor cabinet. The top cover plate 6 is made by a rib pressing process, and has a beautiful appearance, high strength and light weight. A number of drainage holes are provided on the base frame 15. The second mica plate 501 provided on the resistor element 5, the first mica plate 18 on the front and rear transition air ducts, and the double-layer insulation structure composed of the top cover plate 6 and the base frame 15 effectively solve the problem of high temperature of the brake resistor casing.

[0025] As an implementation method in this embodiment, a pair of hanging rings 2 are fixedly installed on the left side plate 4 and the right side plate 10, and a junction box 17 is fixedly set on the side of the fan 1. The power supply of the fan 1 and the output of the temperature control alarm signal are realized through the junction box 17.

[0026] Working principle:

[0027] The excess electrical energy is converted into thermal energy through the resistance element 5. Through the rotation of the impeller of the fan 1, the air flow is first blown to the air inlet transition duct. When the air flow passes through the conical air guide ring in the air inlet transition duct for concentrating the air flow, the central area of ​​the resistance element 5 where the heat is most concentrated is cooled, and then discharged through the rear side panel 7 to the air outlet mesh cover 8.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent application of the present invention.

Claims

1. A braking resistor device for electric locomotive, characterized in that: The invention comprises a resistance cabinet, wherein the resistance cabinet is formed by welding five plates, namely a base frame (15), a left side plate (4), a right side plate (10), a front side plate (3), and a rear side plate (7); a top cover plate (6) is fixedly provided on the upper side of the resistance cabinet; a resistance element (5) is provided in the resistance cabinet; a fan (1) is fixedly provided at one end of the resistance cabinet, and an air outlet mesh cover (8) is fixedly provided at the other end; an air inlet mesh cover (16) is fixedly provided on the fan (1) via a flange; eight groups of the resistance elements (5) are provided, four second mica plates (501) are provided on the outer side of each group of the resistance elements (5), and each group of the resistance elements (5) is composed of a plurality of unit resistors arranged in parallel; eight pairs of guide rail assemblies (9) are symmetrically provided in the resistance cabinet, the guide rail assemblies (9) are fixedly connected to the left side plate (4) and the right side plate (10) via insulators (14), and the resistance elements (5) are provided in the guide rail assemblies (9).

2. A braking resistor device for electric locomotive according to claim 1, characterized in that: Two conical air guide rings are provided on the front side plate (3) near the fan side, and four first mica plates (18) are fixedly connected around the front side plate (3) near the resistor element (5). The conical air guide rings and the first mica plates (18) together form an air inlet transition duct. The two conical air guide rings are concentrically arranged, and the large opening of the conical ring faces the fan (1) and the small opening faces the resistor element (5).

3. A braking resistor device for electric locomotive according to claim 2, characterized in that: One side of the rear side plate (7) is fixedly connected to four of the first mica plates (18) to form an air outlet transition duct, and the other side is fixedly connected to the air outlet mesh cover (8).

4. A braking resistor device for electric locomotive according to claim 3, characterized in that: A large-line outlet box (11) and a temperature control device (13) are fixedly connected to the right side plate (10), a large-line outlet box cover (12) is fixedly connected to the large-line outlet box (11), and a sealing gasket is provided on the large-line outlet box cover (12).

5. A braking resistor device for electric locomotive according to claim 4, characterized in that: The large-line outlet box (11) is provided with a copper busbar (19), a line terminal (21), and an external cable (20); the copper busbar (19) is electrically connected to the resistor element (5); an end of the copper busbar (19) is fixedly connected to the line terminal (21); and the line terminal (21) is fixedly connected to the external cable (20).

6. A braking resistor device for electric locomotive according to claim 3, characterized in that: The base frame (15) is provided with a plurality of drainage holes, and the second mica plate (501) provided on the resistance element (5), the first mica plate (18) on the front and rear transition air ducts, the top cover plate (6), and the base frame (15) form a double-layer heat insulation structure.

7. A braking resistor device for electric locomotive according to claim 1, characterized in that: A pair of lifting rings (2) are fixedly mounted on both the left side plate (4) and the right side plate (10), and a junction box (17) is fixedly arranged on the side of the fan (1).

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