CN116858713A - Brush and slip ring current-carrying friction test device and method - Google Patents
Brush and slip ring current-carrying friction test device and method Download PDFInfo
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- CN116858713A CN116858713A CN202310571565.4A CN202310571565A CN116858713A CN 116858713 A CN116858713 A CN 116858713A CN 202310571565 A CN202310571565 A CN 202310571565A CN 116858713 A CN116858713 A CN 116858713A
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 105
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 105
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 8
- 238000011160 research Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 244000185238 Lophostemon confertus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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Abstract
The invention provides a brush and slip ring current-carrying friction test device and method, comprising a bracket system, wherein a driving system for providing power is fixedly arranged on the bracket system, a main shaft of the driving system is connected with a torque measuring instrument through a coupler, a rotary electric slip ring is arranged on a shaft of the torque measuring instrument, the tail end of the shaft is connected with an eccentric device through a shaft sleeve connector, the eccentric device is connected with an insulating slip ring clamp, the insulating slip ring clamp is provided with a slip ring, the ring surface or the end surface of the slip ring is provided with a carbon brush, the carbon brush is arranged on a brush holder, the brush holder is fixed with a brush holder support plate through a bolt, and the brush holder support plate is transversely or axially arranged on the bracket system; the slip ring and the carbon brush are connected with a current loading system. The test device can simulate the friction and wear performance of the slip rings made of different materials, the slip rings are in loose contact with the carbon brushes, the current-carrying friction and wear performance of the slip rings is under the axial fit or transverse fit of the slip rings and the carbon brushes, and the friction and wear condition of the slip rings under the axial fit of the carbon brushes/the slip rings can be explored.
Description
Technical Field
The invention relates to the field of friction and wear test devices, in particular to a brush and slip ring current-carrying friction test device and method.
Background
The carbon brush/slip ring is a key component for guiding exciting current of the generator set into a rotor winding. In the actual running process of the generator, the carbon brush is fixed on the brush holder by a constant-pressure spring and is transversely matched with the slip ring, and the surfaces of the carbon brush and the slip ring are in sliding friction contact. In the running process, mechanical abrasion and electrical corrosion of the slip ring can occur, the friction coefficient of the surface of the slip ring can be changed, the conductivity between the carbon brush and the slip ring can be changed, the contact surface of the carbon brush and the slip ring can be ignited, and the surface of the slip ring is damaged.
At present, according to market research, the current-carrying friction testing machine in China is developed by taking a high-speed railway bow net system as a background, and a test object mainly adopts a pin plate and is mainly characterized by high speed and high current. A carbon brush/slip ring sliding contact model is not provided with a testing machine in the current market, and a simulated carbon brush/slip ring current-carrying friction and wear testing machine is designed urgently. The method is used for exploring the current-carrying friction and wear properties of different materials of the slip ring and exploring the damage mechanism of the slip ring aiming at specific working conditions.
Therefore, in view of the above, it is necessary to design a carbon brush/slip ring current-carrying frictional wear test machine capable of simulating the above conditions.
Disclosure of Invention
The invention aims to provide a current-carrying friction test device and method for a brush and a slip ring, wherein the test device can simulate friction and wear performances of slip rings made of different materials, the slip rings are in non-contact with the carbon brush, the current-carrying friction and wear performances of the slip rings under the condition of axial fit or transverse fit of the slip rings and the carbon brush can be explored, and the friction and wear conditions of the slip rings under the condition of eccentric axial fit of the carbon brush/the slip rings can be explored.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: the brush and slip ring current-carrying friction test device comprises a bracket system for supporting and installing the whole device; the device comprises a bracket system, a driving system, a torque measuring instrument, a rotating electric slip ring, an eccentric device, an insulating slip ring clamp, a slip ring, a carbon brush, a brush holder and a brush holder support plate, wherein the driving system for providing power is fixedly arranged on the bracket system; the slip ring and the carbon brush are connected with a current loading system; the system also comprises a test system for collecting experimental data.
The support system comprises a horizontal support, and the horizontal support is formed by splicing profile steel materials.
The driving system comprises a speed regulating motor, the speed regulating motor is fixedly arranged on a motor mounting plate through a motor fixing plate, the output end of the speed regulating motor is provided with a shaft of a torque measuring instrument through a coupler, a bearing and a bearing supporting plate jointly support the shaft of the torque measuring instrument, the motor mounting plate and the bearing supporting plate are fixed on a horizontal bracket in parallel, and the bearing is fixedly arranged in the bearing supporting plate; the shaft of the torque measuring instrument is connected with the shaft sleeve connector through key matching, the shaft sleeve connector is connected with the eccentric device through bolts, the eccentric device is connected with the insulating slip ring clamp through bolts, the insulating slip ring clamp is fixedly connected with the slip ring through bolts, and the slip ring is not in direct contact with the shaft of the torque measuring instrument.
The brush holder is respectively provided with a constant-pressure spring, a pressure sensor, an insulated wire and a carbon brush;
one end of the insulated wire is connected with the bottom of the carbon brush through a connecting screw, and the other end of the carbon brush is in sliding contact with the slip ring to form a friction pair;
the pressure sensor is used for continuously measuring the contact force between the carbon brush and the surface of the slip ring and converting the contact force into an electric signal to be output, so that the contact force between the carbon brush and the slip ring is detected.
The torque measuring instrument forms a torque measuring system and is used for measuring the torque of the output end of the torque measuring instrument in real time and converting the torque into an electric signal to be output.
The shaft sleeve connector, the eccentric device and the insulating slip ring clamp form a shaft eccentric control system, the shaft sleeve connector is connected with the shaft in a coaxial mode through key matching, an eccentric sliding block is installed on the eccentric device in a sliding mode, the insulating slip ring clamp is fixed on the eccentric sliding block, and the eccentric distance of the control slip ring is adjusted through adjusting the installation position of the eccentric sliding block.
The insulating slip ring clamp and the slip ring are assembled to explore the sliding friction between the carbon brush and the slip ring in the axial direction and the transverse direction.
The current loading system comprises a constant-voltage constant-current source, and the constant-voltage constant-current source and the rotary electric slip ring, the variable resistor, the ammeter, the voltmeter, the carbon brush, the slip ring and the data processor form a loop through wires.
The method for testing the current-carrying friction coefficient of the carbon brush/slip ring by adopting the current-carrying friction test device for the electric brush and the slip ring comprises the following steps:
step 1: firstly, correspondingly mounting a slip ring and a carbon brush on an insulating slip ring clamp and a brush holder respectively, and ensuring that the slip ring and the carbon brush are in transverse contact;
step 2: a speed regulating motor is installed, an output shaft is connected with a shaft of the torque measuring instrument by a coupler, an eccentric device is adjusted to ensure that a slip ring is coaxial with the shaft of the torque measuring instrument, and a brush holder is adjusted to ensure good contact between the slip ring and the slip ring;
step 3: the driving system circuit is connected, the driving speed regulating motor is started, the sliding ring is driven to rotate through the shaft of the torque measuring instrument, the carbon brush is in sliding friction contact with the sliding ring, the current loading system is connected after the operation is stable, and the current carrying friction test of the carbon brush and the sliding ring is started;
step 4: in the test process, measuring the torque of a load end through a torque measuring instrument, measuring the pressure between the carbon brush and the slip ring through a pressure sensor, and exploring the change condition of the friction coefficient between the carbon brush and the slip ring through the data output of a data processor;
step 5: changing the polarity of the carbon brush, repeating the steps 2, 3 and 4, and exploring the change condition of the friction coefficient between the carbon brush and the slip ring under different polarities;
step 6: the position of an eccentric sliding block of the eccentric device is adjusted to enable the sliding ring to be eccentric, the steps are repeated, and meanwhile, a high-speed camera can be used for detecting the sparking situation of the carbon brush and the sliding ring; the influence of different eccentricities on the contact characteristics of the carbon brush and the surface of the slip ring is researched by using a research method of control variables;
step 7: the positions of the brush holder and the brush holder supporting plate are adjusted to enable the carbon brush to axially contact with the slip ring; repeating the steps 2, 3 and 4, and exploring the change of the current-carrying friction performance between the carbon brush and the slip ring by different contact modes.
The invention has the following beneficial effects:
1. the carbon brush/slip ring disclosed by the invention has the same contact mode as the carbon brush/slip ring in the actual hydraulic generator, is in a ring-block contact mode, and can simulate the actual operation working condition of the carbon brush/slip ring in the hydraulic generator more truly.
2. One end of the device is connected with the output end of the speed regulating motor through the torque measuring instrument, the other end of the device is connected with the slip ring eccentric regulating system, and the carbon brush is axially matched with the slip ring or transversely matched with the slip ring. Under the condition that the slip ring is not eccentric, the single variable method is adopted, and the current-carrying friction and wear performances of different slip ring materials under the axial or transverse matching of the carbon brush and the slip ring are explored; and the eccentric working condition of the slip ring is controlled by controlling the slip ring eccentric adjusting system, so that the current-carrying frictional wear performance of different slip ring materials under the axial or transverse matching of the carbon brush and the slip ring is explored.
3. According to the invention, the torque of the load end is measured through the torque measuring instrument, and the pressure sensor arranged in the brush box is used for measuring the pressure between the carbon brush and the slip ring in real time. According to the data output of the two, the friction coefficient change of the slip ring can be calculated, and the circuit system can calculate the contact resistance change under the condition that the carbon brush/slip ring is not in eccentric contact. Provides a reference for the optimal installation structure of the carbon brush and the slip ring of the hydraulic generator and the selection of the slip ring material.
4. The installation position of the insulating slip ring clamp can be conveniently adjusted through the eccentric sliding block, and the effect of adjusting the eccentricity of the slip ring is achieved.
5. When the contact mode between the insulating slip ring clamp and the slip ring needs to be changed, only the installation position of the brush holder support plate needs to be changed, so that radial contact or end surface contact is formed between the carbon brush and the slip ring, and different test purposes are achieved.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is an overall construction diagram of the present invention.
Fig. 2 is an exploded view of the present invention.
Fig. 3 is an exploded view of the slip ring and eccentric assembly of the present invention.
Fig. 4 is a schematic view of the structure of the brush holder according to the present invention.
FIG. 5 is a schematic diagram of the current loading of the present invention.
Fig. 6 is a schematic axial assembly diagram of a carbon brush and a slip ring according to the present invention.
In the figure: horizontal bracket 1, speed regulating motor 2, motor fixing plate 3, motor mounting plate 4, coupling 5, torque measuring instrument 6, bearing support plate 7, bearing 8, rotary electric slip ring 9, shaft sleeve connector 10, eccentric device 11, insulating slip ring clamp 12, slip ring 13, brush holder 14, brush holder support plate 15, bolt 16, constant voltage and constant current power supply 17, voltmeter 18, variable resistor 19, ammeter 20, data processor 21, eccentric slide block 22;
a constant-pressure spring 14.1, a pressure sensor 14.2, an insulated wire 14.3 and a carbon brush 14.4.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-6, a brush and slip ring current carrying friction test device includes a bracket system for supporting and mounting the entire device; the device comprises a bracket system, a driving system for providing power, a torque measuring instrument 6, a rotary electric slip ring 9, an eccentric device 11, an insulating slip ring clamp 12, a slip ring 13, a carbon brush 14.4, a brush holder 14 and a brush holder support plate 15, wherein the main shaft of the driving system is connected with the torque measuring instrument 6 through a shaft coupling 5, the rotary electric slip ring 9 is arranged on the shaft of the torque measuring instrument 6, the end of the shaft is connected with the eccentric device 11 through a shaft sleeve connector 10, the eccentric device 11 is connected with the insulating slip ring clamp 12, the insulating slip ring clamp 12 is provided with the slip ring 13, the ring surface or the end surface of the slip ring 13 is provided with the carbon brush 14.4, the carbon brush 14.4 is arranged on the brush holder 14, the brush holder 14 is fixed with the brush holder support plate 15 through a bolt 16, and the brush holder support plate 15 is transversely or axially arranged on the bracket system; the slip ring 13 and the carbon brush 14.4 are connected with a current loading system; the system also comprises a test system for collecting experimental data. The test device can simulate the friction and wear performance of the slip rings made of different materials, the slip rings are in loose contact with the carbon brushes, the current-carrying friction and wear performance of the slip rings is under the axial fit or transverse fit of the slip rings and the carbon brushes, and the friction and wear condition of the slip rings under the axial fit of the carbon brushes/the slip rings can be explored. In the specific test process, the corresponding torque measuring instrument 6 is driven by the driving system, the shaft sleeve connector 10 and the eccentric device 11 are driven to rotate by the torque measuring instrument 6, the insulating slip ring clamp 12 and the slip ring 13 are synchronously driven to rotate by the eccentric device 11, and further the slip contact fit is formed by the slip ring 13 and the carbon brush 14.4, so that the purpose of friction test is achieved, and current loading is synchronously carried out by the current loading system.
Further, the bracket system comprises a horizontal bracket 1, wherein the horizontal bracket 1 is formed by splicing profile steel materials. The whole test device is convenient to support through the bracket system.
Further, the driving system comprises a speed regulating motor 2, the speed regulating motor 2 is fixedly arranged on a motor mounting plate 4 through a motor fixing plate 3, the output end of the speed regulating motor 2 is provided with a shaft of a torque measuring instrument 6 through a coupler 5, a bearing 8 and a bearing supporting plate 7 jointly support the shaft of the torque measuring instrument 6, the motor mounting plate 4 and the bearing supporting plate 7 are fixed on a horizontal bracket 1 in parallel, and the bearing 8 is fixedly arranged in the bearing supporting plate 7; the shaft of the torque measuring instrument 6 is connected with the shaft sleeve connector 10 through key fit, the shaft sleeve connector 10 is connected with the eccentric device 11 through bolts, the eccentric device 11 is connected with the insulating slip ring clamp 12 through bolts, the insulating slip ring clamp 12 is fixedly connected with the slip ring 13 through bolts, and the slip ring 13 is not in direct contact with the shaft of the torque measuring instrument 6. The drive system can be used for providing rotational power. In the working process, the speed regulating motor 2 drives the coupler 5, the coupler 5 drives the torque measuring instrument 6, the torque measuring instrument 6 drives the shaft sleeve connector 10, the shaft sleeve connector 10 drives the eccentric device 11, the eccentric device 11 synchronously drives the insulating slip ring clamp 12 and the slip ring 13, and the test process of relative sliding between the slip ring 13 and the carbon brush 14.4 is realized.
Further, a constant-pressure spring 14.1, a pressure sensor 4.2, an insulated wire 4.3 and a carbon brush 14.4 are respectively installed in the brush holder 14; one end of the insulated wire 14.3 is connected with the bottom of the carbon brush 14.4 through a connecting screw, and the other end of the carbon brush 14.4 is in sliding contact with the slip ring 13 to form a friction pair; the pressure sensor 14.2 is used for continuously measuring the contact force between the carbon brush 14.4 and the surface of the slip ring 13, converting the contact force into an electric signal and outputting the electric signal, so as to detect the contact force between the carbon brush and the slip ring. The carbon brush 14.4 can be effectively pressed through the constant-pressure spring 14.1 in the test process, and then the carbon brush 14.4 is always and reliably pressed on the outer wall of the slip ring 13, and the pressure value is acquired in real time through the pressure sensor 14.2.
Further, the torque measuring instrument 6 forms a torque measuring system for measuring the torque of the output end of the torque measuring instrument 6 in real time and converting the torque into an electric signal to be output. The torque measurement system is convenient for collecting the torque in the rotating process.
Further, the shaft sleeve connector 10, the eccentric device 11 and the insulating slip ring clamp 12 form a shaft eccentric control system, the shaft sleeve connector 10 is coaxially connected with a shaft through key fit, the eccentric device 11 is slidably and adjustably provided with an eccentric slide block 22, the insulating slip ring clamp 12 is fixed on the eccentric slide block 22, and the eccentric distance of the control slip ring is adjusted by adjusting the installation position of the eccentric slide block 22. The installation position of the insulating slip ring clamp 12 can be conveniently adjusted through the eccentric sliding block 22, so that the effect of adjusting the eccentricity of the slip ring 13 is achieved.
Further, the insulating slip ring clamp 12 and the slip ring 13 are assembled to explore the sliding friction between the carbon brush and the slip ring in the axial direction and the transverse direction. When the contact mode between the insulating slip ring clamp 12 and the slip ring 13 needs to be changed, only the installation position of the brush holder supporting plate 15 needs to be changed, so that radial contact or end surface contact is formed between the carbon brush 14.4 and the slip ring 13, and different test purposes are achieved.
Further, the current loading system comprises a constant voltage and constant current source 17, and the constant voltage and constant current source 17 forms a loop with the rotary electric slip ring 9, the variable resistor 19, the ammeter 20, the voltmeter 18, the carbon brush 14.4, the slip ring 13 and the data processor 21 through wires. The current loading system can be used for loading current in the test process, so that the condition of simulated ignition is achieved.
Example 2:
the method for testing the current-carrying friction coefficient of the carbon brush/slip ring by adopting the current-carrying friction test device for the electric brush and the slip ring comprises the following steps:
step 1: firstly, correspondingly mounting a slip ring 13 and a carbon brush 14.4 on an insulating slip ring clamp 12 and a brush holder 14 respectively, and ensuring that the slip ring clamp 12 and the carbon brush 14 are in transverse contact;
step 2: the speed regulating motor 2 is installed, the output shaft is connected with the shaft of the torque measuring instrument 6 by the coupler 5, the eccentric device 11 is adjusted to ensure the coaxial center of the slip ring 13 and the shaft of the torque measuring instrument 6, and the brush holder 14 is adjusted to ensure good contact between the slip ring 13 and the shaft;
step 3: the driving system circuit is connected, the driving speed regulating motor 2 is started, the slip ring 13 is driven to rotate through the shaft of the torque measuring instrument 6, the carbon brush 14.4 is in sliding friction contact with the slip ring 13, the current loading system is connected after the operation is stable, and a current carrying friction test of the carbon brush 14.4 and the slip ring 13 is started;
step 4: in the test process, the torque of the load end is measured through the torque measuring instrument 6, the pressure between the carbon brush 14.4 and the slip ring 13 is measured through the pressure sensor 4.2, and the change condition of the friction coefficient between the carbon brush and the slip ring 13 is explored through the data output of the data processor 21;
step 5: changing the polarity of the carbon brush 14.4, repeating the steps 2, 3 and 4, and exploring the change condition of the friction coefficient between the carbon brush and the slip ring under different polarities;
step 6: the position of the eccentric sliding block 22 of the eccentric device 11 is adjusted to make the sliding ring 13 eccentric, the steps are repeated, and the high-speed camera can be used for detecting the sparking situation of the carbon brush 14.4 and the sliding ring 13; the influence of different eccentricities on the surface contact characteristics of the carbon brush 14.4 and the slip ring 13 is researched by using a research method of control variables;
step 7: the positions of the brush holder 14 and the brush holder supporting plate 15 are adjusted to enable the carbon brush to axially contact with the slip ring 13; repeating the steps 2, 3 and 4, and exploring the change of the current-carrying friction performance between the carbon brush 14.4 and the slip ring 13 by different contact modes.
Claims (9)
1. Electric brush and sliding ring current-carrying friction test device, its characterized in that: comprising a bracket system for supporting and mounting the whole device; the device comprises a bracket system, a driving system for providing power, a torque measuring instrument (6) connected with a spindle of the driving system through a coupler (5), a rotary electric slip ring (9) arranged on a shaft of the torque measuring instrument (6), an eccentric device (11) connected with an insulating slip ring clamp (12) through a shaft sleeve connector (10) at the tail end of the shaft, a slip ring (13) arranged on the insulating slip ring clamp (12), a carbon brush (14.4) arranged on the annular surface or the end surface of the slip ring (13) in a rotating manner, and a brush holder (14.4) arranged on a brush holder (14), wherein the brush holder (14) is fixed with a brush holder support plate (15) through a bolt (16), and the brush holder support plate (15) is transversely or axially arranged on the bracket system; the slip ring (13) and the carbon brush (14.4) are connected with a current loading system; the system also comprises a test system for collecting experimental data.
2. The brush and slip ring current carrying friction test device according to claim 1, wherein: the support system comprises a horizontal support (1), wherein the horizontal support (1) is formed by splicing profile steel materials.
3. The brush and slip ring current carrying friction test device according to claim 2, wherein: the driving system comprises a speed regulating motor (2), the speed regulating motor (2) is fixedly arranged on a motor mounting plate (4) through a motor fixing plate (3), the output end of the speed regulating motor (2) is provided with a shaft of a torque measuring instrument (6) through a coupler (5), a bearing (8) and a bearing supporting plate (7) jointly support the shaft of the torque measuring instrument (6), the motor mounting plate (4) and the bearing supporting plate (7) are parallelly fixed on a horizontal bracket (1), and the bearing (8) is fixedly arranged in the bearing supporting plate (7); the shaft of the torque measuring instrument (6) is connected with the shaft sleeve connector (10) through key matching, the shaft sleeve connector (10) is connected with the eccentric device (11) through bolts, the eccentric device (11) is connected with the insulating slip ring clamp (12) through bolts, the insulating slip ring clamp (12) is fixedly connected with the slip ring (13) through bolts, and the slip ring (13) is not in direct contact with the shaft of the torque measuring instrument (6).
4. The brush and slip ring current carrying friction test device according to claim 1, wherein: a constant-pressure spring (14.1), a pressure sensor (4.2), an insulated wire (4.3) and a carbon brush (14.4) are respectively arranged in the brush holder (14);
one end of the insulated wire (14.3) is connected with the bottom of the carbon brush (14.4) through a connecting screw, and the other end of the carbon brush (14.4) is in sliding contact with the slip ring (13) to form a friction pair;
the pressure sensor (14.2) is used for continuously measuring the contact force between the carbon brush (14.4) and the surface of the slip ring (13) and converting the contact force into an electric signal to be output so as to detect the contact force between the carbon brush and the slip ring.
5. A brush and slip ring current carrying friction test apparatus as claimed in claim 3 wherein: the torque measuring instrument (6) forms a torque measuring system and is used for measuring the torque of the output end of the torque measuring instrument (6) in real time and converting the torque into an electric signal to be output.
6. The brush and slip ring current carrying friction test device according to claim 1, wherein: the shaft sleeve connector (10), the eccentric device (11) and the insulating slip ring clamp (12) form a shaft eccentric control system, the shaft sleeve connector (10) is coaxially connected with a shaft through key fit, the eccentric device (11) is slidably adjusted and provided with an eccentric sliding block (22), the insulating slip ring clamp (12) is fixed on the eccentric sliding block (22), and the eccentric distance of the control slip ring is adjusted by adjusting the installation position of the eccentric sliding block (22).
7. The brush and slip ring current carrying friction test device according to claim 1, wherein: the insulating slip ring clamp (12) and the slip ring (13) are assembled to explore the sliding friction between the carbon brush and the slip ring in the axial direction and the transverse direction.
8. The brush and slip ring current carrying friction test device according to claim 1, wherein: the current loading system comprises a constant voltage and constant current source (17), wherein the constant voltage and constant current source (17) and a rotary electric slip ring (9), a variable resistor (19), an ammeter (20), a voltmeter (18), a carbon brush (14.4), a slip ring (13) and a data processor (21) form a loop through wires.
9. A method for carrying out carbon brush/slip ring current-carrying friction coefficient test by adopting the brush and slip ring current-carrying friction test device according to any one of claims 1 to 8, which is characterized by comprising the following steps:
step 1: firstly, correspondingly mounting a slip ring (13) and a carbon brush (14.4) on an insulating slip ring clamp (12) and a brush holder (14) respectively, and ensuring that the slip ring clamp and the carbon brush are in transverse contact;
step 2: a speed regulating motor (2) is installed, an output shaft is connected with the shaft of the torque measuring instrument (6) by a coupler (5), an eccentric device (11) is adjusted to ensure that a slip ring (13) is coaxial with the shaft of the torque measuring instrument (6), and a brush holder (14) is adjusted to ensure that the slip ring is in good contact with the slip ring (13);
step 3: a drive system circuit is connected, a drive speed regulating motor (2) is started, a slip ring (13) is driven to rotate through a shaft of a torque measuring instrument (6), a carbon brush (14.4) is in sliding friction contact with the slip ring (13), a current loading system is connected after the operation is stable, and a current carrying friction test of the carbon brush (14.4) and the slip ring (13) is started;
step 4: in the test process, the torque of a load end is measured through a torque measuring instrument (6), the pressure between the carbon brush (14.4) and the slip ring (13) is measured through a pressure sensor (4.2), and the change condition of the friction coefficient between the carbon brush and the slip ring (13) is explored through the data output of a data processor (21);
step 5: changing the polarity of the carbon brush (14.4), repeating the steps 2, 3 and 4, and exploring the change condition of the friction coefficient between the carbon brush and the slip ring under different polarities;
step 6: the position of an eccentric sliding block (22) of the eccentric device (11) is adjusted to make the sliding ring (13) eccentric, the steps are repeated, and simultaneously, a high-speed camera can be used for detecting the sparking condition of the carbon brush (14.4) and the sliding ring (13); the influence of different eccentricities on the surface contact characteristics of the carbon brush (14.4) and the slip ring (13) is researched by using a research method of control variables;
step 7: the positions of the brush holder (14) and the brush holder supporting plate (15) are adjusted to enable the carbon brush to axially contact with the slip ring (13); repeating the steps 2, 3 and 4, and exploring the change of the current-carrying friction performance between the carbon brush (14.4) and the slip ring (13) by different contact modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310571565.4A CN116858713A (en) | 2023-05-21 | 2023-05-21 | Brush and slip ring current-carrying friction test device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310571565.4A CN116858713A (en) | 2023-05-21 | 2023-05-21 | Brush and slip ring current-carrying friction test device and method |
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| CN202310571565.4A Pending CN116858713A (en) | 2023-05-21 | 2023-05-21 | Brush and slip ring current-carrying friction test device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148021A (en) * | 2023-10-30 | 2023-12-01 | 华能新能源股份有限公司山西分公司 | Wind-powered electricity generation sliding ring brush testing arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148021A (en) * | 2023-10-30 | 2023-12-01 | 华能新能源股份有限公司山西分公司 | Wind-powered electricity generation sliding ring brush testing arrangement |
| CN117148021B (en) * | 2023-10-30 | 2024-01-02 | 华能新能源股份有限公司山西分公司 | Wind-powered electricity generation sliding ring brush testing arrangement |
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