Carbon brush ignition monitoring integrated dust hood

Abstract

The utility model discloses a carbon brush ignition monitoring integrated dust hood, which belongs to the technical field of motor excitation, and comprises a dust hood sleeved on a collector ring, the dust hood is provided with an ultrahigh frequency antenna and a window, the ultrahigh frequency antenna is used for measuring ultrahigh frequency electromagnetic wave signals in the ignition process of a carbon brush, and the ultrahigh frequency antenna is connected with a detection circuit through an SMA (Shape Memory Alloy) interface. According to the utility model, the ultrahigh frequency antenna is arranged on the dust collection cover, so that the ignition and discharge of the carbon brush can be monitored, two functions of restraining carbon powder and monitoring the ignition of the carbon brush are realized, and meanwhile, the embedded design is adopted, so that the integrity and the aesthetic property are better. The adopted carbon brush ignition monitoring mode can achieve monitoring of tiny carbon brush ignition, compared with an existing ultraviolet arc light probe and other means, the carbon brush ignition monitoring device has the advantages of being not blocked, wide in measurement range, high in sensitivity and the like, and large-range carbon brush ignition monitoring can be achieved more easily.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor excitation technical field, concretely relates to a carbon brush spark monitoring integrated dust cover. BACKGROUND

[0002] The dust cover of the generator rotor excitation system is part of the carbon powder collecting device, which can avoid problems such as low rotor excitation system insulation resistance and serious grounding faults caused by carbon powder accumulation. The dust cover is generally composed of glass fiber reinforced plastic and acrylic material, the glass fiber reinforced plastic has good mechanical strength and electrical performance, and is the framework of the entire dust cover, and the acrylic has good light transmittance, facilitating observation of the real-time running state of the carbon brush, especially the carbon brush spark state. At present, the carbon brush spark monitoring mainly adopts an arc light probe, but the arc light probe cannot be directly installed on the dust cover and is usually arranged at the collector ring support and other parts. However, this method can only detect the light signal in a local area, and has great limitations in actual application.

[0003] During the carbon brush sparking process, in addition to the generation of light signals, a large amount of electromagnetic wave signals will be radiated in space due to the fluctuation of current and local electric field. Electromagnetic waves have good space propagation characteristics. However, due to the complex internal space of the collector ring chamber, many external electromagnetic interference sources, and the problem that electromagnetic waves are easily blocked by metal parts, the sensor needs to be developed and designed accordingly. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the problems in the prior art and provides a carbon brush spark monitoring integrated dust cover. An ultrahigh frequency antenna is arranged on the dust cover to monitor the carbon brush sparking and discharging, has two functions of restraining carbon powder and monitoring carbon brush sparking, and has better overallity and aesthetics by adopting the embedded design. The carbon brush spark monitoring method can realize the monitoring of small carbon brush sparking and has the advantages of not being blocked, wide measurement range, high sensitivity, and the like compared with the existing ultraviolet arc light probe and other means, and is easier to realize large-scale carbon brush spark monitoring.

[0005] The utility model realizes the following technical scheme:

[0006] A carbon brush spark monitoring integrated dust cover, comprising a dust cover sleeved on a collector ring, wherein an ultrahigh frequency antenna for measuring ultrahigh frequency electromagnetic wave signals in the carbon brush sparking process and a window are arranged on the dust cover, and the ultrahigh frequency antenna is connected to a detection circuit through an SMA interface.

[0007] Preferably, the dust cover comprises a dust cover body, and sleeve parts matched with the collector ring and mounting parts matched with the upper and lower conductive rings are arranged on both sides of the dust cover body.

[0008] Preferably, the upper and lower conductive rings are fixedly arranged on the mounting portion, and the upper and lower conductive rings are connected with the boom support through a screw rod.

[0009] Preferably, the window, the ultra-high frequency antenna and the SMA interface are arranged on the dust cover body.

[0010] Preferably, the ultra-high frequency antenna adopts an FPC ultra-high frequency antenna.

[0011] Preferably, the ultra-high frequency antenna adopts a planar dish-shaped antenna, and the planar dish-shaped antenna comprises a first antenna patch and a second antenna patch, and the first antenna patch and the second antenna patch are arranged on the front and back surfaces of the dust cover body, respectively.

[0012] Preferably, the interval between the first antenna patch and the second antenna patch is 1.5mm-2mm.

[0013] Preferably, the window adopts a plurality of windows.

[0014] Preferably, the plurality of windows are uniformly distributed around the ultra-high frequency antenna.

[0015] Preferably, the dust cover is made of glass fiber reinforced plastic.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] Firstly, the carbon brush sparking monitoring integrated dust cover can monitor the carbon brush sparking and discharging by arranging an ultra-high frequency antenna on the dust cover, has the functions of restraining carbon powder and monitoring carbon brush sparking, and has better integrity and better appearance by adopting a buried design. The carbon brush sparking monitoring method can realize the monitoring of small carbon brush sparking, and has the advantages of not being blocked, wide measuring range and high sensitivity compared with the existing ultraviolet arc light probe and other means, and can more easily realize large-range carbon brush sparking monitoring.

[0018] Secondly, the carbon brush sparking monitoring integrated dust cover embeds a flexible ultra-high frequency antenna in the dust cover, uses epoxy resin as a glue layer, and uses a dielectric constant of about 4-5 as a medium substrate of the flexible ultra-high frequency antenna.

[0019] Thirdly, the carbon brush sparking monitoring integrated dust cover has a standing wave ratio VSWR of less than 2 in a frequency range of 200MHz-700MHz, and adopts a 50Ω coaxial cable for power feeding. The coaxial cable can be connected through an SMA interface. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a structural schematic view of the utility model;

[0021] Fig. 2 This is a front view of the present invention;

[0022] Fig. 3 This is a schematic diagram illustrating the use of this utility model;

[0023] The components include: 1. Dust hood; 11. Dust hood body; 12. Sleeving part; 13. Mounting part; 2. UHF antenna; 21. First antenna patch; 22. Second antenna patch; 3. Viewing window; 4. SMA interface; 5. Upper conductive ring; 6. Lower conductive ring; 7. Screw; 8. Hanging rod bracket. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0025] Example 1

[0026] like Figs. 1-3 As shown, this embodiment provides an integrated dust collection hood for carbon brush ignition monitoring, including a dust collection hood 1 fitted onto a slip ring. The dust collection hood 1 is equipped with an ultra-high frequency antenna 2 and a viewing window 3 for measuring ultra-high frequency electromagnetic wave signals during carbon brush ignition. The ultra-high frequency antenna 2 is connected to a detection circuit via an SMA interface 4. The detection circuit is prior art and will not be described in detail here.

[0027] Example 2

[0028] This embodiment provides an integrated dust collection cover for carbon brush ignition monitoring, including a dust collection cover 1 sleeved on a slip ring. The dust collection cover 1 is equipped with an ultra-high frequency antenna 2 and a viewing window 3 for measuring ultra-high frequency electromagnetic wave signals during carbon brush ignition. The ultra-high frequency antenna 2 is connected to a detection circuit via an SMA interface 4. The detection circuit is prior art and will not be described in detail here.

[0029] The dust hood 1 includes a dust hood body 11, and the dust hood body 11 has a sleeve part 12 that matches the current collector ring and an mounting part 13 that matches the upper conductive ring 5 and the lower conductive ring 6 on both sides.

[0030] The upper conductive ring 5 and the lower conductive ring 6 are fixedly mounted on the mounting part 13, and are connected to the hanger bracket 8 via screws 7. By adjusting the positions of the hanger bracket 8, the upper conductive ring 5, and the lower conductive ring 6, the sleeve part 12 is fitted onto the collector ring.

[0031] The window 3, the ultra-high frequency antenna 2, and the SMA interface 4 are all located on the dust cover body 11.

[0032] The ultra-high frequency antenna 2 is an FPC ultra-high frequency antenna 2. The FPC ultra-high frequency antenna 2 is a flexible circuit board ultra-high frequency antenna 2, and its operating frequency band covers 300MHz-3GHz.

[0033] The ultra-high frequency antenna 2 is a planar dish antenna, comprising a first antenna patch 21 and a second antenna patch 22, which are respectively disposed on the front and back sides of the dust collector body 11. Both the first antenna patch 21 and the second antenna patch 22 are fixed to the ultra-high frequency antenna 2 placement slots on the front and back sides of the dust collector body 11 by adhesive layers. The first antenna patch 21 and the second antenna patch 22 are equilateral right triangles with a side length of approximately 70mm, and the two triangular patches are respectively connected to the two ports of the SMA interface. The first antenna patch 21 and the second antenna patch 22 can also be broadband antennas such as rectangular patch antennas or fractal antennas.

[0034] The spacing between the first antenna patch 21 and the second antenna patch 22 is 1.5mm to 2mm.

[0035] Multiple windows 3 are used. These multiple windows 3 are evenly distributed around the UHF antenna 2.

[0036] The dust cover 1 is made of fiberglass.

[0037] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0038] I. This utility model provides an integrated dust collection cover 1 for carbon brush arcing monitoring. An ultra-high frequency antenna 2 is installed in the dust collection cover 1 to monitor carbon brush arcing discharge. It has two functions: confining carbon powder and monitoring carbon brush arcing. Furthermore, its embedded design improves overall aesthetics and appearance. The carbon brush arcing monitoring method employed can detect even minute carbon brush arcing. Compared with existing methods such as ultraviolet arc light probes, it has advantages such as being unobstructed, having a wide measurement range, and high sensitivity, making it easier to achieve large-scale carbon brush arcing monitoring.

[0039] II. The present invention provides a carbon brush ignition monitoring integrated dust cover 1, in which a flexible ultra-high frequency antenna 2 is embedded, and epoxy resin is used as the adhesive layer with a relative permittivity of about 4-5 as the dielectric substrate of the flexible ultra-high frequency antenna 2.

[0040] III. This utility model provides an integrated dust cover 1 for carbon brush ignition monitoring, and an ultra-high frequency antenna 2 with a VSWR < 2 in the frequency range of 200MHz~700MHz, powered by a 50Ω coaxial cable. The coaxial cable can be connected via an SMA interface 4.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A carbon brush ignition monitoring integrated dust cover, characterized in that: Includes a dust collection hood (1) fitted on a collector ring, wherein the dust collection hood (1) is provided with an ultra-high frequency antenna (2) and a viewing window (3) for measuring ultra-high frequency electromagnetic wave signals during carbon brush ignition, and the ultra-high frequency antenna (2) is connected to a detection circuit through an SMA interface (4).

2. The carbon brush ignition monitoring integrated dust cover according to claim 1, characterized in that: The dust hood (1) includes a dust hood body (11), and the dust hood body (11) is provided with a sleeve part (12) that matches the collector ring and an mounting part (13) that matches the upper conductive ring (5) and the lower conductive ring (6) on both sides.

3. The carbon brush ignition monitoring integrated dust cover according to claim 2, characterized in that: The upper conductive ring (5) and the lower conductive ring (6) are fixedly mounted on the mounting part (13), and the upper conductive ring (5) and the lower conductive ring (6) are connected to the hanger bracket (8) by a screw (7).

4. The carbon brush ignition monitoring integrated dust cover according to claim 3, characterized in that: The viewing window (3), the ultra-high frequency antenna (2) and the SMA interface (4) are all located on the dust cover body (11).

5. The carbon brush ignition monitoring integrated dust cover according to claim 4, characterized in that: The ultra-high frequency antenna (2) is an FPC ultra-high frequency antenna.

6. The carbon brush ignition monitoring integrated dust cover according to claim 5, characterized in that: The ultra-high frequency antenna (2) adopts a planar dish antenna, which includes a first antenna patch (21) and a second antenna patch (22). The first antenna patch (21) and the second antenna patch (22) are respectively disposed on the front and back sides of the dust cover body (11).

7. The carbon brush ignition monitoring integrated dust cover according to claim 6, characterized in that: The spacing between the first antenna patch (21) and the second antenna patch (22) is 1.5mm to 2mm.

8. The carbon brush ignition monitoring integrated dust cover according to claim 7, characterized in that: The window (3) is multiple.

9. The carbon brush ignition monitoring integrated dust cover according to claim 8, characterized in that: Multiple windows (3) are evenly distributed around the UHF antenna (2).

10. The carbon brush ignition monitoring integrated dust cover according to claim 9, characterized in that: The dust cover (1) is made of fiberglass.

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