A test device for carbon fiber grounding device

Abstract

The present application provides a test device for a carbon fiber grounding device, which is used to solve the problem that the existing test equipment cannot perform simulation tests under all working conditions and the accuracy of dynamic resistance detection is low. It includes a first mounting frame and a slip ring mounted on the first mounting frame, the slip ring includes a stator assembly and a rotor assembly for transmitting electric energy by rotating friction; a friction disc assembly is mounted on one end of the rotor assembly, and a mounting frame assembly for mounting the carbon fiber grounding device to be tested is provided on one side of the friction disc assembly, and the carbon fiber grounding device and the friction disc assembly are rotated to transmit electric energy by friction; the rotor assembly is electrically connected to the friction disc assembly, and the input end of the stator assembly is electrically connected to the current output end of the large current generator, and also includes a multimeter for testing the instantaneous voltage and current at the output end of the carbon fiber grounding device. The present application can simulate the conductivity of the carbon fiber grounding device under different working conditions, and the detection data has no delay, so the instantaneous resistance obtained has high accuracy without delay.

Description

Technical Field

[0001] The invention relates to the field of grounding device detection, in particular to testing equipment for a carbon fiber grounding device. Background Art

[0002] China has rich wind energy resources and huge development potential, which will surely become an important part of the future energy structure. With the continuous expansion of the market and the rapid development of the wind power industry, various manufacturers have also begun to seek more stable, low-cost and longer-lasting products. One of the most critical problems that is inevitable in wind turbines is the irregular shaft current generated by the rotation of the different shafts of the transmission main shaft. The shaft current will be transmitted to the rotating bearing through the metal parts on the equipment, thereby forming an electro-corrosion phenomenon, affecting the service life of the bearing, and causing a lot of manpower and material waste in the subsequent replacement and maintenance process. In the early market, the way to deal with the generation of shaft current was to use solid carbon brushes to derive the shaft current, but due to the limited installation space and the most critical poor coaxiality of the friction surface of the carbon brush, the carbon brush is easily damaged due to poor coaxiality during use, and the service life is affected by the volume of the carbon brush. Generally, it needs to be shut down for replacement after 14 months. This method has caused a lot of waste of manpower and material resources.

[0003] In order to effectively solve this problem, a carbon fiber grounding brush device has appeared on the market. In order to ensure the stability and reliability of the operation of the carbon fiber grounding brush device, it is necessary to test the performance of the carbon fiber grounding brush device. The existing carbon fiber grounding brush device is tested by a resistance tester to directly test the dynamic resistance, which has the limitation of being unable to perform simulation tests under all working conditions. In addition, the data measured by the resistance tester shows that it takes 3-5 seconds of running calculation time, and the value obtained is not an instantaneous value. The accuracy of dynamic resistance detection is low. Summary of the invention

[0004] The purpose of the present invention is to provide a testing device for a carbon fiber grounding device, which is used to solve the limitation that the existing testing equipment cannot perform simulation tests under all working conditions, and the data measured by the resistance tester needs to be delayed and calculated, and the accuracy of dynamic resistance detection is low.

[0005] A testing device for a carbon fiber grounding device comprises a testing mechanism, wherein the testing mechanism comprises a first mounting frame, and a slip ring mounted on the first mounting frame, wherein the slip ring comprises a stator assembly and a rotor assembly for transmitting electric energy by rotating friction;

[0006] A friction disc assembly is installed at one end of the rotor assembly, and a mounting frame assembly for mounting a carbon fiber grounding device to be tested is also provided on one side of the friction disc assembly, and the carbon fiber grounding device and the friction disc assembly rotate and rub to transmit electrical energy;

[0007] The rotor assembly is electrically connected to the friction disk assembly, the input end of the stator assembly is electrically connected to the current output end of the high current generator, the output end of the carbon fiber grounding device is electrically connected to the high current generator, and also includes a multimeter for testing the instantaneous voltage and current of the output end of the carbon fiber grounding device.

[0008] Optionally, the stator assembly includes a mounting flange mounted on the first mounting frame;

[0009] A slip ring brush holder is installed at one end of the mounting flange, a brush bundle mounting plate is installed on the slip ring brush holder, a first conductive plate and a plurality of slip ring brush bundles are installed on the brush bundle mounting plate, the plurality of slip ring brush bundles are electrically connected to the first conductive plate, the first conductive plate is electrically connected to the current input terminal, and the current input terminal is electrically connected to the current output end of the large current generator.

[0010] Optionally, the rotor assembly includes a transmission shaft, and a shaft sleeve mounted on the transmission shaft, and a conductive ring is mounted on the shaft sleeve;

[0011] The conductive ring and the plurality of slip ring brush bundles rotate and conduct electricity through friction. The conductive ring is also electrically connected to the friction disk assembly through a cable. Limiting rings are installed on the sleeves at both ends of the conductive ring. The rotor flange and the connecting flange are respectively sleeved on the transmission shafts at both ends of the sleeve. An insulating block is also installed on the end of the connecting flange away from the conductive ring.

[0012] Optionally, the friction disc assembly includes a friction disc, a radial friction ring sleeved on the outer wall of the friction disc, and an end friction ring installed on the end face of the friction disc away from the slip ring;

[0013] The radial friction ring and the end friction ring are both electrically connected to the conductive ring through cables. The friction disk is coaxially arranged with the transmission shaft, and the friction disk is mounted on the insulating block.

[0014] Optionally, the mounting frame assembly includes a second mounting frame;

[0015] The lower end of the second mounting frame is mounted on the stator assembly, an insulating rod is mounted on the upper end of the second mounting frame, a first arc-shaped mounting plate is mounted on the front end of the insulating rod, the first arc-shaped mounting plate is coaxially arranged with the radial friction ring, a radial carbon fiber grounding device to be tested is mounted on the inner arc-shaped end face of the first arc-shaped mounting plate, and an output end of the radial carbon fiber grounding device is electrically connected to the high current generator.

[0016] Optionally, the mounting frame assembly further comprises a third mounting frame arranged on a side of the friction disk away from the slip ring, and a second arc-shaped mounting plate and an end surface mounting plate are mounted on the third mounting frame;

[0017] The second arc-shaped mounting plate is mounted with a radial carbon fiber grounding device to be tested, the end surface mounting plate is mounted with an end surface carbon fiber grounding device, and the output ends of the radial carbon fiber grounding device and the end surface carbon fiber grounding device are electrically connected to the high current generator.

[0018] Optionally, the radial carbon fiber grounding device includes a first test plate whose outer end surface is in contact with the inner end surface of the first arc-shaped mounting plate, and the end surface carbon fiber grounding device includes a second test plate arranged parallel to the end surface friction ring;

[0019] A number of grounding carbon fibers are installed on the first test plate and the second test plate. Placement grooves are provided on the outer end surfaces of the first test plate and the second test plate. A second conductive plate is installed in the placement groove. The number of grounding carbon fibers are electrically connected to the second conductive plate. The second conductive plate is electrically connected to a number of grounding wires, respectively. The grounding wires are electrically connected to the high current generator.

[0020] Optionally, a test stand is further included, wherein the number of the test mechanisms is two groups, and the two groups of the test mechanisms are respectively arranged at two ends of the test stand;

[0021] When the test stand is installed, it is locked on the installation surface through a plurality of base clamping blocks.

[0022] Optionally, it also includes a power assembly for driving the rotor assembly to rotate;

[0023] The power assembly includes a driving shaft and a power motor. The power motor drives the driving shaft through a synchronous belt module. Both ends of the driving shaft are respectively connected to the rotor assemblies of two groups of test mechanisms through couplings.

[0024] Optionally, a protective cover is also provided on the outer side of the testing mechanism.

[0025] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0026] 1. This application can simulate the conductivity of the carbon fiber grounding device under different working conditions by adjusting the rotation speed of the friction disk, and detect the instantaneous current and voltage through a multimeter. The detection data has no delay, and the instantaneous resistance calculated by the volt-ampere method has high accuracy without delay. The core conductivity data can be obtained to determine the conductivity of the carbon fiber grounding device.

[0027] 2. The testing equipment of the present application can test the conductivity of radial friction and end friction carbon fiber grounding devices, and can also test the influence of friction ring material on the conductivity of carbon fiber, as well as the influence of carbon fiber quantity on conductivity, and the friction life of carbon fiber, and has a wide range of applications.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings of the present invention are as follows.

[0030] Figure 1 It is a structural schematic diagram of the carbon fiber grounding device testing equipment of the present invention.

[0031] Figure 2 It is a schematic diagram of the structure of the testing equipment and protective cover of the carbon fiber grounding device of the present invention.

[0032] Figure 3 It is a schematic diagram of the structure of the slip ring of the present invention.

[0033] Figure 4 It is a structural schematic diagram of the stator assembly of the present invention.

[0034] Figure 5 It is a schematic structural diagram of the rotor assembly of the present invention.

[0035] Figure 6 It is a cross-sectional view of the rotor assembly of the present invention.

[0036] Figure 7 It is a schematic structural diagram of the radial carbon fiber grounding device of the present invention.

[0037] Figure 8 It is a schematic structural diagram of the end face carbon fiber grounding device of the present invention.

[0038] In the figure: 1-first mounting frame; 2-slip ring; 201-mounting flange; 202-slip ring brush holder; 203-brush bundle mounting plate; 204-first conductive plate; 205-slip ring brush bundle; 206-current input terminal; 207-transmission shaft; 208-shaft sleeve; 209-conductive ring; 210-limiting ring; 211-rotor flange; 212-connecting flange; 213-insulating block; 301-friction disk; 302-radial friction ring; 303-end friction ring; 401-first Second mounting frame; 402-insulating rod; 403-first arc-shaped mounting plate; 404-third mounting frame; 405-second arc-shaped mounting plate; 406-end face mounting plate; 501-first test plate; 502-second test plate; 503-grounded carbon fiber; 504-placement slot; 505-second conductive plate; 601-test frame; 602-base clamping block; 701-driving shaft; 702-power motor; 703-synchronous belt module; 704-coupling; 8-protective cover. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Embodiment 1:

[0041] like Figure 1 and Figure 2 A test device for a carbon fiber grounding device shown in the figure comprises a test frame 601, two symmetrical test mechanisms are respectively arranged at both ends of the test frame 601, the test mechanism comprises a first mounting frame 1, and a slip ring 2 mounted on the first mounting frame 1, the slip ring 2 comprises a stator assembly and a rotor assembly for transmitting electric energy by rotating friction;

[0042] A friction disc assembly is installed at one end of the rotor assembly, and a mounting frame assembly for mounting a carbon fiber grounding device to be tested is also provided on one side of the friction disc assembly, and the carbon fiber grounding device and the friction disc assembly rotate and rub to transmit electrical energy;

[0043] The rotor assembly is electrically connected to the friction disk assembly, the input end of the stator assembly is electrically connected to the current output end of the high current generator, the output end of the carbon fiber grounding device is electrically connected to the high current generator, and also includes a multimeter for testing the instantaneous voltage and current of the output end of the carbon fiber grounding device.

[0044] like Figure 2 As shown, a protective cover 8 is also provided on the outer side of the testing mechanism.

[0045] In this embodiment, when the test stand 601 is installed, it is locked on the installation surface through a plurality of base clamping blocks 602 .

[0046] In this embodiment, a large current generator is used to generate current, which passes through the stator assembly and the rotor assembly of the slip ring 2 in sequence, and then the current is transmitted to the rotating friction disk assembly through the rotor assembly. The friction disk assembly generates friction contact with the stationary carbon fiber grounding device, and then the current is transmitted to the wire at the end of the carbon fiber grounding device. The current flows back to the large current generator through the wire to complete the loop. The instantaneous voltage and current values ​​at a certain moment measured by the multimeter are used to complete the instantaneous resistance measurement using the calculation formula of voltage U / current I=resistance R. At the same time, multiple groups of resistance value tests are completed in this way. After the average value is obtained, it can be regarded as the instantaneous dynamic resistance value of the carbon fiber grounding device in the current state.

[0047] In this embodiment, a tachometer for detecting the rotational speed of the friction disc assembly is also provided on the friction disc assembly. The rotational speed of the friction disc assembly is measured by the tachometer, and the linear speed of the carbon fiber grounding device at this time is calculated in combination with the flange diameter. The rotational speed is adjusted by adjusting the frequency of the power motor 702, and then the linear speed of the carbon fiber grounding device is adjusted, thereby completing the linear speed adjustment for different on-site working conditions. When the linear speed is accurate, the instantaneous voltage and current are measured.

[0048] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the stator assembly includes a mounting flange 201 mounted on the first mounting frame 1;

[0049] A slip ring brush holder 202 is installed at one end of the mounting flange 201, a brush bundle mounting plate 203 is installed on the slip ring brush holder 202, a first conductive plate 204 and a plurality of slip ring brush bundles 205 are installed on the brush bundle mounting plate 203, the plurality of slip ring brush bundles 205 are electrically connected to the first conductive plate 204, the first conductive plate 204 is electrically connected to a current input terminal 206, and the current input terminal 206 is electrically connected to a current output end of a large current generator.

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the rotor assembly includes a transmission shaft 207, and a sleeve 208 sleeved on the transmission shaft 207, and a conductive ring 209 sleeved on the sleeve 208;

[0051] The conductive ring 209 rotates and rubs with the plurality of slip ring brush bundles 205 to conduct electricity. The conductive ring 209 is also electrically connected to the friction disk assembly via a cable. Limiting rings 210 are installed on the sleeves 208 at both ends of the conductive ring 209. The rotor flange 211 and the connecting flange 212 are respectively sleeved on the transmission shaft 207 at both ends of the sleeve 208. An insulating block 213 is also installed on the end of the connecting flange 212 away from the conductive ring 209.

[0052] In this embodiment, the electric energy is transmitted through the rotational friction between the slip ring brush bundle 205 and the conductive ring 209 .

[0053] like Figure 1 and Figure 2 As shown, the friction disc assembly includes a friction disc 301, a radial friction ring 302 sleeved on the outer wall of the friction disc 301, and an end face friction ring 303 installed on the end face of the friction disc 301 away from the slip ring 2;

[0054] The radial friction ring 302 and the end friction ring 303 are both electrically connected to the conductive ring 209 via cables. The friction disc 301 is coaxially arranged with the transmission shaft 207 , and the friction disc 301 is mounted on the insulating block 213 .

[0055] In this embodiment, the friction disk 301 is fixed to the insulating block 213 by screws, and the screw sleeve is provided with an insulating ring and an insulating pad to insulate the friction disk 301 from the rotor assembly. In this embodiment, the radial carbon fiber grounding device is tested by the radial friction ring 302, and the end face carbon fiber grounding device is tested by the end face friction ring 303.

[0056] like Figure 1 and Figure 2 As shown, the mounting frame assembly includes a second mounting frame 401;

[0057] The lower end of the second mounting frame 401 is mounted on the stator assembly, an insulating rod 402 is mounted on the upper end of the second mounting frame 401, a first arc-shaped mounting plate 403 is mounted on the front end of the insulating rod 402, the first arc-shaped mounting plate 403 is coaxially arranged with the radial friction ring 302, a radial carbon fiber grounding device to be tested is mounted on the inner arc-shaped end face of the first arc-shaped mounting plate 403, and an output end of the radial carbon fiber grounding device is electrically connected to the high current generator.

[0058] In this embodiment, the second mounting frame 401 is insulated from the first arc-shaped mounting plate 403 by the insulating rod 402 .

[0059] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the mounting frame assembly further includes a third mounting frame 404 disposed on the side of the friction disc 301 away from the slip ring 2, and a second arc-shaped mounting plate 405 and an end surface mounting plate 406 are mounted on the third mounting frame 404;

[0060] The second arc-shaped mounting plate 405 is mounted with a radial carbon fiber grounding device to be tested, and the end surface carbon fiber grounding device is mounted on the end surface mounting plate 406. The output ends of the radial carbon fiber grounding device and the end surface carbon fiber grounding device are electrically connected to the high current generator.

[0061] In this embodiment, the third mounting bracket 404 is installed on the test bracket 601, and the second arc-shaped mounting plate 405 is installed and fixed through the waist-shaped holes arranged horizontally on the third mounting bracket 404, and the end face mounting plate 406 is installed and fixed through the waist-shaped holes arranged vertically on the third mounting bracket 404. The installation positions of the second arc-shaped mounting plate 405 and the end face mounting plate 406 can be adjusted through the waist-shaped holes.

[0062] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the radial carbon fiber grounding device includes a first test plate 501 whose outer end surface is in contact with the inner end surface of the first arc-shaped mounting plate 403, and the end surface carbon fiber grounding device includes a second test plate 502 arranged parallel to the end surface friction ring 303;

[0063] A plurality of grounding carbon fibers 503 are installed on the first test plate 501 and the second test plate 502. A placement groove 504 is provided on the outer end surfaces of the first test plate 501 and the second test plate 502. A second conductive plate 505 is installed in the placement groove 504. The plurality of grounding carbon fibers 503 are electrically connected to the second conductive plate 505. The second conductive plate 505 is electrically connected to a plurality of grounding wires, respectively. The grounding wires are electrically connected to the high current generator.

[0064] In this embodiment, the grounded carbon fiber 503 is installed on the first test plate 501 and the second test plate 502 using an insulating sleeve, so that the grounded carbon fiber 503 is insulated from the first test plate 501 and the second test plate 502. This method can ensure that the data obtained from the test is true and valid, and will not damage the power motor 702.

[0065] In this embodiment, the grounding carbon fiber 503 rubs against the radial friction ring 302 or the end friction ring 303 to test the conductivity of the carbon fiber grounding device.

[0066] like Figure 1 and Figure 2As shown, it also includes a power assembly for driving the rotor assembly to rotate;

[0067] The power assembly includes a driving shaft 701 and a power motor 702 . The power motor 702 drives the driving shaft 701 through a synchronous belt module 703 . Both ends of the driving shaft 701 are respectively connected to the rotor assemblies of the two test mechanisms through couplings 704 .

[0068] In this embodiment, the rotor assemblies on both sides are driven to rotate by the power motor 702 , and the output frequency of the power motor 702 is adjusted to achieve simulation testing of the friction disk 301 under different linear speed conditions.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A testing device for a carbon fiber grounding device, characterized in that: The test mechanism comprises a first mounting frame (1), and a slip ring (2) mounted on the first mounting frame (1), wherein the slip ring (2) comprises a stator assembly and a rotor assembly for transmitting electric energy by rotating friction; A friction disc assembly is installed at one end of the rotor assembly, and a mounting frame assembly for mounting a carbon fiber grounding device to be tested is also provided on one side of the friction disc assembly, and the carbon fiber grounding device and the friction disc assembly rotate and rub to transmit electrical energy; The rotor assembly is electrically connected to the friction disc assembly, the input end of the stator assembly is electrically connected to the current output end of the high current generator, the output end of the carbon fiber grounding device is electrically connected to the high current generator, and also includes a multimeter for testing the instantaneous voltage and current of the output end of the carbon fiber grounding device; The stator assembly comprises a mounting flange (201) mounted on the first mounting frame (1); a slip ring brush holder (202) is mounted on one end of the mounting flange (201); a brush bundle mounting plate (203) is mounted on the slip ring brush holder (202); a first conductive plate (204) and a plurality of slip ring brush bundles (205) are mounted on the brush bundle mounting plate (203); the plurality of slip ring brush bundles (205) are electrically connected to the first conductive plate (204); the first conductive plate (204) is electrically connected to a current input terminal (206); and the current input terminal (206) is electrically connected to a current output terminal of a large current generator; The rotor assembly comprises a transmission shaft (207), and a shaft sleeve (208) sleeved on the transmission shaft (207); a conductive ring (209) is sleeved on the shaft sleeve (208); the conductive ring (209) and a plurality of the slip ring brush bundles (205) rotate and rub to generate electrical conduction; the conductive ring (209) is also electrically connected to the friction disc assembly via a cable; The friction disc assembly comprises a friction disc (301), a radial friction ring (302) sleeved on the outer wall of the friction disc (301), and an end face friction ring (303) mounted on the end face of the friction disc (301) away from the slip ring (2); The mounting frame assembly comprises a second mounting frame (401), the lower end of the second mounting frame (401) being mounted on the stator assembly, the upper end of the second mounting frame (401) being mounted with an insulating rod (402), the front end of the insulating rod (402) being mounted with a first arc-shaped mounting plate (403), the first arc-shaped mounting plate (403) being coaxially arranged with the radial friction ring (302), a radial carbon fiber grounding device to be tested being mounted on the inner arc-shaped end surface of the first arc-shaped mounting plate (403), and the output end of the radial carbon fiber grounding device being electrically connected to the high current generator; The mounting frame assembly further comprises a third mounting frame (404) arranged on a side of the friction disc (301) away from the slip ring (2), and a second arc-shaped mounting plate (405) and an end surface mounting plate (406) are mounted on the third mounting frame (404); The second arc-shaped mounting plate (405) is mounted with a radial carbon fiber grounding device to be tested, and the end surface carbon fiber grounding device is mounted on the end surface mounting plate (406), and the output ends of the radial carbon fiber grounding device and the end surface carbon fiber grounding device are electrically connected to the high current generator; The radial carbon fiber grounding device comprises a first test plate (501) whose outer end surface is in contact with the inner end surface of the first arc-shaped mounting plate (403); and the end surface carbon fiber grounding device comprises a second test plate (502) arranged in parallel with the end surface friction ring (303); A plurality of grounding carbon fibers (503) are installed on the first test plate (501) and the second test plate (502); placement grooves (504) are provided on the outer end surfaces of the first test plate (501) and the second test plate (502); a second conductive plate (505) is installed in the placement groove (504); the plurality of grounding carbon fibers (503) are electrically connected to the second conductive plate (505); the second conductive plate (505) is electrically connected to a plurality of grounding wires, respectively; and the grounding wires are electrically connected to the large current generator.

2. The testing device for a carbon fiber grounding device according to claim 1, characterized in that: Limiting rings (210) are installed on the shaft sleeves (208) at both ends of the conductive ring (209), and the rotor flange (211) and the connecting flange (212) are respectively sleeved on the transmission shaft (207) at both ends of the shaft sleeve (208), and an insulating block (213) is also installed on one end of the connecting flange (212) away from the conductive ring (209).

3. The testing device for a carbon fiber grounding device according to claim 2, characterized in that: The radial friction ring (302) and the end friction ring (303) are both electrically connected to the conductive ring (209) via a cable; the friction disc (301) is coaxially arranged with the transmission shaft (207); and the friction disc (301) is mounted on the insulating block (213).

4. The testing device for a carbon fiber grounding device according to claim 3, characterized in that: It also comprises a test frame (601), wherein the number of the test mechanisms is two groups, and the two groups of the test mechanisms are respectively arranged at two ends of the test frame (601); When the test stand (601) is installed, it is locked onto the installation surface via a plurality of base pressing blocks (602).

5. The testing device for a carbon fiber grounding device according to claim 4, characterized in that: Also included is a power assembly for driving the rotor assembly to rotate; The power assembly comprises a driving shaft (701) and a power motor (702); the power motor (702) drives the driving shaft (701) via a synchronous belt module (703); and both ends of the driving shaft (701) are respectively connected to rotor assemblies of two groups of test mechanisms via couplings (704).

6. The testing device for a carbon fiber grounding device according to claim 1, characterized in that: A protective cover (8) is also sleeved on the outer side of the testing mechanism.

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