Brake resistor unit

Abstract

The utility model discloses a brake resistor unit, which belongs to the technical field of brake resistors and comprises a cabinet body and a plurality of resistor elements. A plurality of guide rails extending in the vertical direction are arranged on the two sides of the cabinet body. The resistor elements are arranged in the length direction of the cabinet body, and rollers are arranged on the two sides of the resistor elements and limited between the corresponding guide rails. Through cooperation of the rollers and the guide rails, vertical sliding installation and detachment of the resistor element are realized. Compared with a traditional fixed installation mode, the time and labor intensity of maintenance and replacement operation are greatly reduced, meanwhile, the operation flexibility in the space limited environment is improved, and the rapid maintenance requirement of the freight diesel locomotive in the complex operation environment is particularly met. While sliding assembly and disassembly are realized, the resistor elements are limited by the guide rails and can be tightly arranged, so that the anti-seismic requirement of the resistor unit is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of braking resistance, specifically a braking resistance unit. BACKGROUND

[0002] The freight diesel locomotive has an irreplaceable important role in railway transportation due to its strong power and large power. The electric drive system of the freight diesel locomotive is the core of energy conversion and transmission, and the braking resistance unit is a key safety component. During the operation of the freight diesel locomotive, a large amount of regenerative energy is generated when braking. If this energy is not consumed in time and effectively, the electric drive system may be overloaded or even fail. The braking resistance unit quickly releases the regenerative energy in the form of heat energy, thereby ensuring the safe operation of the locomotive.

[0003] However, the operating environment of the freight diesel locomotive is extremely harsh. The strong vibration generated by the locomotive during high-speed operation poses strict requirements on the structural strength and shock resistance of the braking resistance unit. At the same time, the locomotive may be exposed to complex environments for a long time, such as rain, oil stains, dust, and corrosion by other corrosive substances, which increases the maintenance frequency of the braking resistance.

[0004] Currently, there are significant contradictions in the structural design of the braking resistance unit. On the one hand, it needs to ensure stable operation in a vibrating environment, and on the other hand, it needs to meet the requirements of quick installation and removal in a limited space. In the prior art, the braking resistance unit often improves the shock resistance through a firm installation method, but this usually leads to complex installation and removal, increasing the difficulty of maintenance and replacement. Especially in the case of regular inspection and replacement of the braking resistance unit, the difficulty of installation and removal will seriously affect the maintenance efficiency. SUMMARY

[0005] The purpose of the utility model is to provide a braking resistance unit to solve the problems in the prior art.

[0006] A braking resistance unit is provided, comprising:

[0007] A cabinet body, the two sides of the cabinet body are provided with a plurality of guide rails extending in the vertical direction;

[0008] A plurality of resistance elements, the plurality of resistance elements are arranged along the length direction of the cabinet body, the two sides of the resistance element are provided with rollers, and the rollers are limited between the corresponding guide rails.

[0009] Further, the resistance element further comprises a plurality of resistance sheets and two fixing rods, the plurality of resistance sheets are arranged between the two fixing rods, and the rollers are arranged at the end of the fixing rods. This design sets the rollers on the fixing rods, facilitates integration with the resistance element, and realizes electrical insulation between the resistance sheets and the rollers through the insulation of the fixing rods.

[0010] Further, one mica plate is arranged on each side of the resistance element, and the two ends of the mica plate are fixedly connected with the corresponding fixed rods, and one end of the cabinet is provided with a fan. The mica plates are sequentially arranged to form independent heat isolation channels, and the fan provides forced air cooling for the resistance element. The independent air cooling channels and heat isolation design improve the heat dissipation efficiency of the braking resistor, reduce the temperature rise of the cabinet during operation, reduce the occurrence of heat dissipation failure, and improve the safety and stability of the overall system.

[0011] Further, the end of the cabinet away from the fan is provided with an air outlet cylinder, and the bottom wall of the air outlet cylinder is an arc surface. The arc plate structure guides the airflow to a specific direction for discharge, optimizes the airflow discharge path, avoids vortex and airflow blockage, and enables the hot air to be quickly discharged from the cabinet through the air outlet cylinder.

[0012] Further, a plurality of drainage openings are formed in the end of the bottom wall of the air outlet cylinder close to the cabinet, and a water baffle is arranged between the bottom wall of the air outlet cylinder and the cabinet. The drainage design and water baffle structure effectively improve the adaptability of the equipment in a humid environment, avoid the risk of moisture entering the resistance element to cause failure or short circuit, and improve the safety and reliability of equipment operation.

[0013] Further, an insulator is arranged between the guide rail and the cabinet. The guide rail and the cabinet are isolated by the insulator to ensure the electrical insulation performance between the guide rail and the cabinet.

[0014] Further, a limiting block is detachably connected to the top of the guide rail. The limiting block is arranged at the top of the guide rail and fixed by bolts to lock the position of the roller on the guide rail, preventing the resistance element from sliding vertically in a vibrating environment.

[0015] Further, the resistance element further comprises a wall-penetrating insulator and a main circuit cable, the resistance element is led out from the side wall of the cabinet through the wall-penetrating insulator, and the leading end of the wall-penetrating insulator is electrically connected with the main circuit cable. The use of the wall-penetrating insulator optimizes the electrical connection mode, effectively isolates the electrical circuit from the metal structure of the cabinet, and prevents electric leakage and short circuit failure.

[0016] Further, the wall-penetrating insulator comprises an insulating sleeve, a red copper rod and an embedded round nut, the red copper rod and the embedded round nut are integrally formed, and the insulating sleeve is arranged around the red copper rod. The insulating sleeve can effectively isolate the red copper rod from the surrounding metal structure, effectively prevent electric leakage and short circuit failure, and ensure the safe operation of the electrical system. The embedded round nut is used to fix the cabinet, and the installation and removal are more convenient, improving the maintainability of the equipment.

[0017] Further, the main circuit cable is clamped between the wire clamps, and the wire clamps are fixedly connected with the cabinet body through the fixing plates.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] Through cooperation of the rollers and the guide rails, the resistance element is vertically slidably installed and dismounted. Compared with the traditional fixed installation mode, the time and labor intensity of maintenance and replacement operation are greatly reduced, and operation flexibility in a space-limited environment is improved, and the resistance element is especially suitable for quick maintenance requirements in a complex operation environment of a freight diesel locomotive. While achieving sliding installation and dismounting, the resistance element is limited by the guide rails and can be closely arranged, and the anti-seismic requirement of the resistance unit is met. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the drawings, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of a brake resistance unit.

[0022] Figure 2 It is a schematic diagram of the overall structure of a brake resistance unit. Figure 1 It is an enlarged view of the A area in the figure.

[0023] Figure 3 It is a schematic diagram of the structure of the resistance element provided by the utility model.

[0024] Figure 4 It is a schematic diagram of the structure of the wall-penetrating insulator provided by the utility model.

[0025] Figure 5 It is a schematic diagram of the structure of the wall-penetrating insulator provided by the utility model. Figure 1 It is an enlarged view of the B area in the figure.

[0026] In the figure: 1, cabinet body; 11, guide rail; 12, insulator; 13, limiting stop; 2, resistance element; 21, roller; 22, resistance sheet; 23, fixed rod; 24, mica plate; 25, wall-penetrating insulator; 251, insulating sleeve; 252, red copper rod; 253, embedded round nut; 26, main circuit cable; 3, fan; 4, air outlet cylinder; 41, drain opening; 42, water retaining eave; 51, wire clamp; 52, fixing plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is described and explained below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0028] It is obvious that the drawings in the following description are only some examples or embodiments of the present application, and for those of ordinary skill in the art, the present application can also be applied to other similar situations without creative labor on the basis of these drawings. In addition, it can be understood that although the efforts made in this development process can be complex and lengthy, some design, manufacture or production changes made on the basis of the technology disclosed in the present application are only routine technical means for those of ordinary skill in the art related to the content disclosed in the present application, and should not be understood as insufficient disclosure of the content disclosed in the present application.

[0029] However, there will be cases of omission of unnecessary detailed description. For example, there are cases of omission of detailed description of well-known matters, repeated description of actually identical structures. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided for those skilled in the art to fully understand the present application, and are not intended to limit the subject matter recited in the claims.

[0030] Please refer to Figures 1-2 As shown in the drawings, the utility model embodiment, a brake resistance unit, including cabinet 1 and a plurality of resistance elements 2. The two sides of cabinet 1 are provided with a plurality of vertical direction extension guide rail 11. A plurality of resistance elements 2 are arranged along the length direction of cabinet 1, and the two sides of resistance element 2 are provided with a roller 21, and the roller 21 is limited between the corresponding guide rail 11.

[0031] The two sides of cabinet 1 are provided with vertical direction extension guide rail 11, and each resistance element 2 is provided with roller 21 on both sides, and the roller 21 is limited between guide rail 11, and resistance element 2 can slide in guide rail 11. This design makes resistance element 2 can easily slide to the required position, facilitates installation and disassembly operation, improves maintenance efficiency, especially suitable for space limited or frequently replaced application scenarios, significantly reduces the difficulty of maintenance.

[0032] Please refer to Figures 1-3As shown, the braking resistor is formed by closely arranging several groups of same resistor elements 2, and the rollers 21 are mounted on the fixing rods 23 of the resistor elements 2 and are slidably installed in the cabinet body 1 through the guide rails 11. The guide rails 11 are installed on the cabinet body 1 through the insulators 12, and the guide rails 11 are isolated from the cabinet body 1 through the insulators 12. The insulators 12 prevent the electrical connection between the guide rails 11 and the cabinet body 1, avoid the leakage or short circuit between the guide rails 11 and the cabinet body 1, and improve the electrical safety and stability of the system.

[0033] The insulators 12 are made of high-alumina porcelain, which has good electrical and mechanical properties. The breakdown voltage of the insulators 12 is ≥30kv, the withstand voltage is ≥20kv, the insulation resistance is ≥100GΩ, the creepage distance is ≥120mm, the compressive strength is ≥30KN, the tensile strength is ≥10KN, and the bending strength is ≥6KN. The selection of high-alumina porcelain ensures that there is no structural deformation and reduction of electrical insulation performance at high temperatures, and ensures the safe and reliable use of the resistor elements 2.

[0034] A limiting block 13 is arranged at the top of the guide rail 11, and the limiting block 13 is fixed by bolts and arranged on the left and right of each resistor element 2. During assembly, the top cover plate of the cabinet body 1 is opened, the resistor elements 2 can be slid into the guide rail 11 through the rollers 21, and then the limiting block 13 at the upper part of the guide rail 11 is fixed to complete the assembly. During disassembly, the top cover plate of the cabinet body 1 is opened, the limiting block 13 is disassembled, and then the resistor elements 2 are directly pulled out along the guide rail 11. The limiting block 13 is used to limit the sliding range of the rollers 21, prevent the resistor elements 2 from moving freely in the guide rail 11, and enhance the position stability of the resistor elements 2 during operation. Even in a vibrating environment, reliable positioning can be maintained, and the function of easy disassembly is provided, improving the maintenance efficiency.

[0035] Since the braking resistor device is installed on the roof of the vehicle, there is enough space for disassembly at the top, and the resistor elements 2 can be easily disassembled and installed. One end of the cabinet body 1 is provided with a fan 3, which is used to provide cooling air flow to the braking resistor in the cabinet body 1. In the ventilation direction, the resistor elements 2 are surrounded by the mica plate 24 to form a forced air cooling duct around the resistor sheet 22 generating heat during power transmission. The independent cooling air duct is formed by separate arrangement to achieve thermal isolation from the inside of the cabinet body 1 and the outside. The independent air cooling channel cooperates with forced air cooling to effectively improve the ventilation and heat dissipation efficiency and reduce the temperature of the braking resistor shell, thereby improving the safety and stability of the system.

[0036] Please refer to Figure 1 As shown, the end of the cabinet body 1 away from the fan 3 is provided with an air outlet tube 4, and the bottom wall of the air outlet tube 4 is an arc surface for guiding the hot air to flow in a specific direction and quickly discharge. The arc structure reduces air resistance, avoids vortex and air accumulation, and optimizes the heat dissipation effect. The hot air discharge is more efficient, reducing the energy consumption of the heat dissipation system, and enhancing the operating capacity of the equipment under high load conditions.

[0037] The bottom wall of the air outlet cylinder 4 is provided with a drain port 41 near one end of the cabinet body 1, and a water retaining eave 42 is installed between the bottom wall and the cabinet body 1. The drain port 41 can drain the water accumulated at the inlet, and the water retaining eave 42 increases the water level. This design avoids rainwater from entering the cabinet body 1 through the air exhaust path. The design of the drain port 41 and the water retaining eave 42 effectively improves the reliability of the braking resistor in a humid environment, avoids moisture intrusion causing the resistor element 2 to be damp or short-circuited, and ensures that the equipment can safely operate under complex climate conditions.

[0038] Please refer to Figure 1 and Figure 4 , the resistor elements 2 are connected by copper busbars, and the copper busbars of the resistor elements 2 are electrically connected to the main circuit cable 26 through the wall insulation 25. Compared with the prior art of directly electrically connecting the copper busbars to the main circuit, the wall insulation 25 can effectively isolate the electrical circuit from the surrounding metal structure, prevent electrical leakage, and have more reliable electrical insulation performance. The wall insulation 25 is composed of an insulating sleeve 251, a copper rod 252 and an embedded round nut 253, and the embedded round nut 253 is fixed on the cabinet body 1 by bolts. The insulating sleeve 251 can effectively isolate the copper rod 252 from the surrounding metal structure, effectively prevent electrical leakage and short circuit failure, ensure the safe operation of the electrical system, and realize quick assembly and disassembly through the embedded round nut 253, improve the maintainability and operating efficiency of the equipment. The insulating sleeve 251 is made of DMC material, and the copper rod 252 and the insulating sleeve 251 are made by integral molding.

[0039] Please refer to Figure 1 and Figure 5 , the cabinet body 1 side corresponding to the main circuit cable 26 is provided with a plurality of wire clamps 51 along the length direction, the main circuit cable 26 is clamped between the wire clamps 51, and the wire clamps 51 are fixedly connected with the cabinet body 1 through the fixed plate 52. The wire clamp 51 is made of 3240 epoxy glass cloth plate material, which has better electrical safety and stability compared with the prior art of using plastic wire to bind the cable on the wire rod. The combination design of the wire clamp 51 and the fixed plate 52 ensures the stability of the main circuit cable 26, avoids the problem of loose connection caused by vibration, improves the reliability of electrical connection, and optimizes the cable wiring, making the equipment inside more tidy and orderly.

[0040] Note that the present application is not limited to the above-described embodiments. The above-described embodiments are merely examples, and embodiments having substantially the same configuration, function, and effect as the technical idea of the present application are included in the technical scope of the present application. Furthermore, other modes constructed by applying various modifications to the embodiments, or by combining part of the configurations of the embodiments, which can be conceived by those skilled in the art without departing from the spirit of the present application, are also included in the scope of the present application.

Claims

1. A braking resistor unit, characterized by Include: Cabinet body (1), both sides of the cabinet body (1) are provided with a plurality of guide rails (11) extending in the vertical direction; A plurality of resistance elements (2), a plurality of resistance elements (2) are arranged along the length direction of the cabinet body (1), both sides of the resistance element (2) are provided with a roller (21), the roller (21) is limited between the corresponding guide rail (11).

2. A braking resistor unit according to claim 1, characterized in that The resistance element (2) further comprises a plurality of resistance sheets (22) and two fixed rods (23), a plurality of resistance sheets (22) are arranged between the two fixed rods (23), and the roller (21) is arranged at the end of the fixed rod (23).

3. A brake resistor unit according to claim 2, characterised in that, Both sides of the resistance element (2) are provided with a mica plate (24), both ends of the mica plate (24) are fixedly connected with the corresponding fixed rod (23), and one end of the cabinet body (1) is provided with a fan (3).

4. A brake resistor unit according to claim 3, characterised in that, The end of the cabinet body (1) away from the fan (3) is provided with an air outlet cylinder (4), and the bottom wall of the air outlet cylinder (4) is an arc surface.

5. A braking resistor unit according to claim 4, characterised in that A plurality of drain holes (41) are formed in the end of the bottom wall of the air outlet cylinder (4) close to the cabinet body (1), and a water baffle (42) is arranged between the bottom wall of the air outlet cylinder (4) and the cabinet body (1).

6. A brake resistor unit according to claim 1, wherein The insulator (12) is arranged between the guide rail (11) and the cabinet body (1).

7. A braking resistor unit according to claim 1, characterized in that The top of the guide rail (11) is detachably connected with a limiting block (13).

8. A brake resistor unit according to claim 1, characterized in that The resistance element (2) further comprises a wall bushing (25) and a main circuit cable (26), the resistance element (2) is led out from the side wall of the cabinet body (1) through the wall bushing (25), and the leading end of the wall bushing (25) is electrically connected with the main circuit cable (26).

9. A brake resistor unit according to claim 8, characterised in that, The wall bushing (25) comprises an insulating sleeve (251), a red copper rod (252) and an embedded round nut (253), the red copper rod (252) and the embedded round nut (253) are integrally formed, and the insulating sleeve (251) is arranged on the periphery of the red copper rod (252).

10. A brake resistor unit according to claim 8, characterized in that Further comprising a wire clamp (51) and a fixed plate (52), the main circuit cable (26) is clamped between the wire clamps (51), and the wire clamps (51) are fixedly connected with the cabinet body (1) through the fixed plate (52).

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