A collector ring for an electric shovel

Abstract

The utility model relates to a trolley with trolley, relate to trolley technical field, including the first flange plate of upper end position and the second flange plate of lower end position, be equipped with a plurality of conducting ring between the first flange plate and the second flange plate, the adjacent conducting ring and the lowermost conducting ring with the second flange board between all are equipped with insulation structure, the insulation structure includes insulation spacer and insulation baffle, the insulation spacer is arranged in the upper and lower both ends of insulation baffle, the first flange plate and the second flange plate are connected with conducting ring and insulation structure through insulation screw rod, the utility model discloses through the insulation structure, guarantee the insulation performance while, not only reduce the volume of trolley, make it be favorable to use in the environment of limited space, also promote the voltage resistance grade, significantly prolong the service life of brush and conducting ring, and then improve the stability of actual work and the safety of on -the -spot maintenance.

Description

Technical Field

[0001] This utility model relates to the field of slip ring technology, and in particular to a slip ring for electric shovels. Background Technology

[0002] As a key component in rotating electrical equipment, the performance of slip rings directly affects the reliability and efficiency of motors, generators, and other equipment. In high-voltage operating environments, to ensure stable operating voltage, the contact pressure between the slip ring and the brush must be uniform and stable under high-speed rotation. However, slip rings typically experience significant vibration and contamination. To prevent arcing due to poor brush contact and to ensure brush strength, the size is usually increased to ensure sufficient effective contact surface for the brush. However, this also increases the overall size and production cost of the slip ring.

[0003] Therefore, it is necessary to optimize the insulation structure of the slip ring to ensure its insulation reliability while reducing costs. Utility Model Content

[0004] To overcome the technical defects of the existing technology, this utility model provides a slip ring for electric shovels, which reduces costs while ensuring its insulation reliability.

[0005] The technical solution adopted in this utility model is: A current collector ring for an electric shovel includes a first flange plate at the upper end and a second flange plate at the lower end. Multiple conductive rings are provided between the first flange plate and the second flange plate. An insulating structure is provided between adjacent conductive rings and between the lowermost conductive ring and the second flange plate. The insulating structure includes an insulating sleeve and an insulating partition, with the insulating sleeve arranged at the upper and lower ends of the insulating partition; The first flange plate and the second flange plate are connected to the conductive ring and the insulating structure by insulating screws.

[0006] Preferably, the conductive ring, insulating sleeve, and insulating partition are nested on the insulating screw, and the insulating screw is threadedly connected to the first flange plate and the second flange plate.

[0007] Preferably, the insulating screw is fitted with a 2mm thick glass cloth tube impregnated with flame-retardant and arc-resistant paint. Preferably, the insulating partition is a circular plate with a circular outer perimeter and a hollow area in the middle. The hollow area has protruding sections and recessed sections arranged alternately along the circumference to form a non-circular outline. The insulating partition plate has multiple through holes for the insulating screw to pass through, each through hole being located near a recessed section of the hollow region. Preferably, a mandrel is connected to the second flange plate, the mandrel passing through the insulating structure, the conductive ring, and the center of the second flange plate.

[0008] Preferably, both the insulating sleeve and the insulating partition are made of epoxy glass cloth sheet by cutting.

[0009] Preferably, the thickness of the insulating partition is 3mm.

[0010] Preferably, the outer diameter of the insulating partition is larger than the outer diameter of the conductive ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention employs an insulation structure combining an insulating sleeve and an insulating partition made of thin epoxy glass cloth. While ensuring insulation performance, it not only reduces the size of the slip ring, making it suitable for use in space-constrained environments, but also increases the withstand voltage rating by more than 10%, significantly extending the service life of the brush and the conductive ring. This, in turn, improves the stability of actual operation and the safety of on-site maintenance.

[0012] The insulation structure is located between adjacent conductive rings, increasing the local space and heat dissipation area, making brush installation and adjustment more convenient and reducing the likelihood of interference. Simultaneously, it facilitates the timely removal of carbon dust and contaminants generated during use. For the low-voltage conductive rings, the creepage distance is more than doubled, making them more reliable in high-humidity and high-pollution environments, and effectively isolating dust contamination, minimizing the probability of brush scuffing and breakdown. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the insulation structure; Figure 3 for Figure 1 Enlarged view of point A in the middle; Explanation of reference numerals in the attached figures: 1. First flange plate; 2. Second flange plate; 3. Conductive ring; 4. Insulation structure; 5. Insulating screw; 6. Mandrel; 7. Brush; 41. Insulating sleeve; 42. Insulating plate; 421. Raised section; 422. Recessed section; 423. Through hole. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The following is combined with Figures 1 to 3 As shown, this embodiment provides a current collector ring for an electric shovel, including a first flange plate 1 at the upper end and a second flange plate 2 at the lower end. A plurality of conductive rings 3 are provided between the first flange plate 1 and the second flange plate 2. An insulating structure 4 is provided between adjacent conductive rings 3 and between the lowermost conductive ring 3 and the second flange plate 2. The insulating structure 4 includes an insulating sleeve 41 and an insulating plate 42, with the insulating sleeve 41 arranged at the upper and lower ends of the insulating plate 42. The first flange plate 1 and the second flange plate 2 are connected to the conductive ring 3 and the insulating structure 4 by an insulating screw 5. Specifically, the conductive ring 3, insulating sleeve 41, and insulating partition 42 are nested on the insulating screw 5, which is threadedly connected to the first flange plate 1 and the second flange plate 2. A 2mm thick glass cloth tube impregnated with flame-retardant and arc-resistant paint is fitted over the outer side of the insulating screw 5 for insulation. The insulating screw 5 passes through the conductive ring 3 and is made of #45 steel, which has higher strength and better integrity than ordinary bolts, making it less likely to cause burrs on the conductive ring 3 during assembly or operation.

[0020] The number of insulating screws 5 is preferably 4.

[0021] A mandrel 6 is connected to the second flange plate 2, and the mandrel 6 passes through the insulating structure 4, the conductive ring 3, and the center of the second flange plate 2. The mandrel 6 is rigidly connected to the second flange plate 2, providing rotational power to drive the conductive ring 3 to rotate. The outer surface of the mandrel 6 is covered with an insulating film to enhance insulation performance.

[0022] Specifically, the insulating partition 42 is a circular plate with a circular outer perimeter and a hollow central area. This hollow area has alternating circumferentially arranged protruding sections 421 and recessed sections 422, forming a non-circular contour such as a petal or wave shape. The insulating partition 42 has multiple through holes 423 for inserting insulating screws 5. Each through hole 423 is located near a recessed section 422 in the hollow area, ensuring structural strength while avoiding weakening the effective insulation area of ​​the insulating partition 42.

[0023] The structure of the insulating partition 42 increases the gap between the mandrel 6 and the conductive ring 3, maximizing the utilization of the exposed area of ​​the conductive ring 3, improving heat dissipation, and reducing weight. It also provides installation space for the conductive ring 3 when it needs to carry high-current cables.

[0024] Specifically, the insulating sleeve 41 and the insulating partition 42 are both cut from thin epoxy glass cloth boards and their dielectric strength is enhanced by impregnation with insulating varnish. Compared with the traditional one-piece molded insulation structure, they are easier to process and require less installation space while having the same insulation performance.

[0025] Specifically, the thickness of the insulating partition 42 is 3mm. For the low-voltage conductive ring, the insulating structure 4 meets the minimum space requirements for brush 7 installation, and the creepage distance is more than doubled, the withstand voltage rating is improved by approximately 10%, and the safety performance is higher.

[0026] After the collector ring is assembled, the outer diameter of the insulating partition 42 is larger than the outer diameter of the conductive ring 3. This ensures that there will be no phase-to-phase short circuit, while also preventing the brush 7 from moving and wearing down the insulating material, thus reducing the frequency of brush 7 maintenance and replacement.

[0027] This invention, without altering the contact surface between the brush 7 and the conductive ring 3, uses epoxy fiberglass cloth to fabricate thin insulating sleeves 41, which are then spaced apart between the conductive rings 3. This increases the local space and heat dissipation area, making the installation and adjustment of the brush 7 more convenient and reducing the likelihood of interference. Simultaneously, it facilitates the timely removal of carbon dust and contaminants generated during use.

[0028] Based on this, a 3mm thick insulating partition 42 is added between adjacent conductive rings 3. For low-voltage conductive rings, the creepage distance is more than doubled, making them more reliable in high humidity and high pollution environments. It can also effectively isolate dust pollution and minimize the probability of brush 7 scratching and breakdown.

[0029] The insulation structure 4, composed of insulating sleeve 41 and insulating partition 42, not only reduces the volume of the slip ring, making it more suitable for use in space-constrained environments, but also increases the withstand voltage rating by more than 10%, significantly extending the service life of brush 7 and conductive ring 3, thereby improving the stability of actual operation and the safety of on-site maintenance.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A slip ring for an electric shovel, characterized in that, It includes a first flange plate (1) at the upper end and a second flange plate (2) at the lower end. Multiple conductive rings (3) are provided between the first flange plate (1) and the second flange plate (2). An insulating structure (4) is provided between adjacent conductive rings (3) and the lowermost conductive ring (3) and the second flange plate (2). The insulating structure (4) includes an insulating sleeve (41) and an insulating plate (42), wherein the insulating sleeve (41) is arranged at the upper and lower ends of the insulating plate (42); 2. The first flange plate (1) and the second flange plate (2) are connected to the conductive ring (3) and the insulating structure (4) by an insulating screw (5).

2. The slip ring for an electric shovel according to claim 1, characterized in that, The conductive ring (3), insulating sleeve (41), and insulating partition (42) are nested on the insulating screw (5), and the insulating screw (5) is threadedly connected to the first flange plate (1) and the second flange plate (2).

3. The slip ring for an electric shovel according to claim 1, characterized in that, The insulating screw (5) is fitted with a glass cloth tube with a thickness of 2mm that is impregnated with flame-retardant and arc-resistant paint.

4. The slip ring for an electric shovel according to claim 1, characterized in that, The insulating partition (42) is a circular plate with a circular outer perimeter and a hollow area in the middle. The hollow area has protruding sections (421) and recessed sections (422) arranged alternately along the circumference to form a non-circular outline. The insulating partition (42) is provided with a plurality of through holes (423) for the insulating screw (5) to pass through, and each of the through holes (423) is located near the recessed section (422) of the hollow region.

5. The slip ring for an electric shovel according to claim 1, characterized in that, A mandrel (6) is connected to the second flange plate (2), and the mandrel (6) passes through the insulating structure (4), the conductive ring (3), and the center of the second flange plate (2).

6. The slip ring for an electric shovel according to claim 1, characterized in that, Both the insulating sleeve (41) and the insulating partition (42) are made of epoxy glass cloth sheet by cutting.

7. The slip ring for an electric shovel according to claim 1, characterized in that, The thickness of the insulating partition (42) is 3 mm.

8. The slip ring for an electric shovel according to claim 1, characterized in that, The outer diameter of the insulating partition (42) is larger than the outer diameter of the conductive ring (3).

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