Improved eddy current brake

Abstract

The utility model discloses an improved eddy current brake which comprises a main body, water outlet pipelines are arranged on the front side and the rear side of the upper end of the main body, water inlet pipelines are arranged on the front side and the rear side of the lower end of the main body, the water inlet pipeline on one side has a W-shaped section, and each trough point or each crest point of the water inlet pipelines is provided with an arched double-sided filter screen. According to the utility model, the water inlet pipeline is designed into a W-shaped section, and the reasonable arched double-sided filter screen is arranged at an impact point, so that the filtration of impurities in a water body is enhanced; the arched double-sided filter screen is designed to be of an asymmetric structure with wide inlet and narrow outlet, and the flow direction characteristic of cooling water is combined, so that the impurity removal efficiency is improved, and meanwhile, the influence on cooling water conveying is reduced; a water inlet pipeline structure which firstly descends and then ascends is adopted, and the modes of sieve flushing and sieve overflowing are combined, so that the structure is more reasonable and scientific; while the filtering effect is guaranteed, a gap is reserved, installation and filter screen protection are facilitated, the maintenance workload is reduced, and the fault occurrence frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power detection technology, and more specifically, to an improved eddy current brake. Background Technology

[0002] Eddy current brakes, also known as eddy current loaders, are among the most advanced loading devices in China. They utilize the principle of eddy current loss to absorb power. As the loading device for dynamometers, they, along with WLK type controllers, ZJ(HX) type torque and speed sensors, TR type torque, speed and power dynamometers, and automatic testing software, form a complete dynamometer system. This system is used to detect parameters such as torque, speed, and power of power and transmission machinery such as motors, internal combustion engines, drilling rigs, and reducers.

[0003] Currently, the maintenance and troubleshooting of electric eddy current brakes inevitably involve rust removal and cleaning of the cooling water channels. This is mainly because when using a circulating water tank for water supply, the cooling water inevitably contains corrosive substances such as sand, salt, acid, and alkali. Over time, scale forms in the cooling water channels and corrodes the pipes. Simply installing a filter screen at the inlet to remove these substances is usually ineffective. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an improved eddy current brake to solve one or more of the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An improved eddy current brake includes a main body, with water outlet pipes on the front and rear sides of the upper end of the main body and water inlet pipes on the front and rear sides of the lower end of the main body. The water inlet pipe on one side has a W-shaped cross section, and each trough or crest point of the water inlet pipe is provided with an arched double-sided filter screen.

[0007] Furthermore, the connection port of the water inlet pipe is aligned with the vertical midpoint of the wave crest and trough, and the vertical distance between the wave crest and trough of the water inlet pipe and the vertical midpoint is the same.

[0008] Furthermore, the bottom of the arched double-sided filter screen has a spherical groove, and the inner bottom of the bend of the water inlet pipe is provided with a spherical protrusion. The arched double-sided filter screen and the water inlet pipe are connected by the spherical groove and the spherical protrusion.

[0009] Furthermore, the cross-section of the arched double-sided filter screen is fan-shaped, and the spherical groove at the bottom of the arched double-sided filter screen, which is installed at the trough, is offset towards the side closer to the water inlet pipe connection.

[0010] Furthermore, the size of the filter eye on the side of the arched double-sided filter facing the direction of the cooling water inlet is larger than the size of the filter eye on the side facing the direction of the cooling water outlet.

[0011] Furthermore, the bottom of the arched double-sided filter screen is provided with a hemispherical scale-inhibiting cover, and the scale-inhibiting cover is provided with G1 scale-inhibiting balls.

[0012] Furthermore, an installation gap is left at the corner of the arched double-sided filter screen and the water inlet pipe.

[0013] Furthermore, a filter screen is provided at the connection point of the water inlet pipe.

[0014] In summary, this utility model has the following beneficial effects: The inlet pipe is designed with a W-shaped cross-section, and a reasonable arched double-sided filter screen is installed at the impact point to enhance the filtration of impurities in the water; the arched double-sided filter screen is designed with an asymmetrical structure, wide inlet and narrow outlet, which, combined with the flow characteristics of cooling water, improves the impurity removal efficiency while reducing the impact on cooling water transport; the inlet pipe structure is designed with a downward-then-rising shape, combining the flushing and overflow screening modes, which is more reasonable and scientific; while ensuring the filtration effect, gaps are left to facilitate installation and filter screen protection, reducing maintenance workload and lowering the frequency of failures. Attached Figure Description

[0015] Figure 1 A schematic diagram of one embodiment of this utility model;

[0016] Figure 2 A partial sectional view of one embodiment of this utility model;

[0017] Figure 3 A cross-sectional view of the water outlet pipe according to one embodiment of this utility model;

[0018] Figure 4 An enlarged view of an arched double-sided filter screen according to one embodiment of this utility model.

[0019] In the diagram: 1. Main body; 2. Outlet pipe; 3. Inlet pipe; 4. Arched double-sided filter screen; 5. Spherical groove; 6. Spherical protrusion; 7. Scale inhibition cover; 8. Induction plate; 9. Main shaft; 10. Excitation coil; 11. Cooling chamber; 12. Eddy current ring; 13. Front armature body; 14. Rear armature body; 15. Outer casing; 16. Base. Detailed Implementation Example

[0020] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0021] Improved eddy current brakes, such as Figure 1 and Figure 2As shown, the main body 1 includes an outlet pipe 2, an inlet pipe 3, an arched double-sided filter screen 4, an induction disc 8, a main shaft 9, an excitation coil 10, a cooling chamber 11, an eddy current ring 12, a front armature body 13, a rear armature body 14, an outer casing 15, and a base 16, etc. The specific connection relationships and layout are not described in detail. This application has optimized the design at the position of the inlet pipe 3.

[0022] like Figure 1 and Figure 2 As shown, water outlet pipes 2 are provided on both the front and rear sides of the upper end of the main body 1, and water inlet pipes 3 are provided on both the front and rear sides of the lower end of the main body 1. The water outlet pipes 2 and water inlet pipes 3 at both ends converge into the corresponding cooling chambers 11, achieving communication between the internal and external water channels and forming a unidirectional flow path for the cooling water. Conventional filter screens are installed at the connection points of the water inlet pipes 3 and the water outlet pipes 2 to perform simple filtration. Figure 3 As shown, the single-sided water inlet pipe 3 has a W-shaped cross-section. The connection port of the water inlet pipe 3 is aligned with the vertical midpoint of the crest and trough. The vertical distance between the crest and trough of the water inlet pipe 3 and the vertical midpoint is the same. That is, the water inlet pipe 3 is divided into a complete trough section, a crest section and a trough section in sequence with the horizontal plane where the vertical midpoint is located as the boundary. The crest section in the middle forms a complete vertical drop distance between the lowest point of the trough and the highest point of the crest. After the cooling water enters the pipe, it goes through the following processes in sequence: downward rushing, upward overflowing, falling back and a second upward overflowing.

[0023] like Figure 3 As shown, theoretically, the cooling water flow is not perfectly smooth along the pipe; it inevitably passes through several impact points. Therefore, separate arched double-sided filters 4 are installed at these impact points, namely the crests and troughs, to perform buffering coarse filtration and overflow fine sieving processes. Specifically, as follows... Figure 4 As shown, the arched double-sided filter screen 4 has a fan-shaped cross-section, with a hemispherical scale-inhibiting cover 7 at its bottom. Inside the scale-inhibiting cover 7 are G1 scale-inhibiting balls, which are spherical chemical reagent blocks of G1 scale inhibitor formed through special processing. These balls can adsorb impurities in the water at a chemical level. To protect the filter screen and reduce impact loss, the filter eye size on the side of the arched double-sided filter screen 4 facing the cooling water inlet is designed to be larger, while the filter eye size on the other side facing the cooling water outlet is designed to be smaller, achieving a wide inlet and narrow outlet. The two filter surfaces are tangential to the corresponding pipes, meaning the cooling water passes through the filter screen vertically. To facilitate the installation and replacement of the arched double-sided filter screen 4, an installation gap is left at the corner of the arched double-sided filter screen 4 and the water inlet pipe 3, and to ensure that the cooling water passes through the filter screen before it reaches the impact point. This can be roughly achieved by designing the length, diameter, and corner curvature of the pipe. The slight error is within an acceptable range, and the three arched double-sided filter screens 4 inside the water inlet pipe 3 are almost negligible.

[0024] like Figure 4As shown, a spherical groove 5 is provided at the bottom of the arched double-sided filter screen 4, and a spherical protrusion 6 is provided at the inner bottom of the bend in the water inlet pipe 3, that is, spherical protrusions 6 are provided at the trough and crest points. However, in order to adapt to the structural characteristics of the water inlet pipe 3 and the impact force distribution of the cooling water, the spherical groove 5 at the bottom of the arched double-sided filter screen 4 installed at the trough needs to be offset towards the side closer to the connection port of the water inlet pipe 3. This is to ensure that the cooling water can pass through the filter screen smoothly before reaching the impact point. The arched double-sided filter screen 4 at the crest has a symmetrical structural design. The arched double-sided filter screen 4 completes the connection between the arched double-sided filter screen 4 and the water inlet pipe 3 by snapping the spherical groove 5 at the bottom onto the corresponding spherical protrusion 6 at the position of the water inlet pipe 3, which facilitates disassembly and maintenance.

[0025] like Figure 3 As shown, cooling water enters the inlet pipe 3 through the connection port, first falling and impacting the coarse filter side of the first arched double-sided filter screen 4. After being buffered, it is adsorbed by the internal G1 scale-inhibiting ball, then screened by the fine filter side and rises upwards, quickly reaching the second arched double-sided filter screen 4 and rushing out to the coarse filter side. It then flows out from the fine filter side and quickly falls back, passing through the coarse filter side of the third arched double-sided filter screen 4 for buffering. After three stages of filtration, it enters the cooling chamber 11 from the connection port through the fine filter side, participating normally in the brake's working process, and is discharged from the outlet pipe 2. Most of the scale that may be present is adsorbed on the G1 scale-inhibiting ball and the arched double-sided filter screen 4. Timely replacement can reduce scale buildup on the pipe walls, reduce maintenance workload, and lower the frequency of failures.

[0026] It should be noted that this specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An improved eddy current brake, comprising a main body (1), characterized in that: Water outlet pipes (2) are provided on the front and rear sides of the upper end of the main body (1), and water inlet pipes (3) are provided on the front and rear sides of the lower end of the main body (1). The water inlet pipe (3) on one side has a W-shaped cross section, and each trough or crest point of the water inlet pipe (3) is provided with an arched double-sided filter screen (4).

2. The improved eddy current brake according to claim 1, characterized in that: The connection port of the water inlet pipe (3) is aligned with the vertical midpoint of the wave crest and the wave trough, and the vertical distance between the wave crest and the wave trough of the water inlet pipe (3) and the vertical midpoint is the same.

3. The improved eddy current brake according to claim 1, characterized in that: The bottom of the arched double-sided filter screen (4) has a spherical groove (5), and the inner bottom of the bend of the water inlet pipe (3) is provided with a spherical protrusion (6). The arched double-sided filter screen (4) and the water inlet pipe (3) are connected by the spherical groove (5) and the spherical protrusion (6).

4. The improved eddy current brake according to claim 3, characterized in that: The cross-section of the arched double-sided filter (4) is fan-shaped, and the spherical groove (5) at the bottom of the arched double-sided filter (4) installed at the trough is offset towards the side closer to the connection port of the water inlet pipe (3).

5. The improved eddy current brake according to claim 1, characterized in that: The size of the filter eye on the side facing the cooling water inlet of the arched double-sided filter screen (4) is larger than the size of the filter eye on the side facing the cooling water outlet.

6. The improved eddy current brake according to claim 1, characterized in that: The bottom of the arched double-sided filter screen (4) is provided with a hemispherical scale inhibition cover (7), and the scale inhibition cover (7) is provided with a G1 scale inhibition ball.

7. The improved eddy current brake according to claim 1, characterized in that: An installation gap is left at the corner between the arched double-sided filter screen (4) and the water inlet pipe (3).

8. The improved eddy current brake according to claim 1, characterized in that: A filter screen is provided at the connection port of the water inlet pipe (3).

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