A control system and control method for realizing uniform wear of a pantograph carbon slide plate

Abstract

The present application relates to the technical field of pantograph carbon slide plate, and particularly relates to a control system and a control method for realizing uniform wear of a pantograph carbon slide plate, which comprises a driving device and a carbon slide plate, the carbon slide plate is in contact with a catenary, the carbon slide plate comprises an active friction part and a passive friction part, the catenary comprises a straight line part and an inclined part, and the driving device always drives the carbon slide plate to move in the process of the straight line part being in contact with the carbon slide plate. The present application sets the active friction part and the passive friction part on the carbon slide plate, and sets the driving device in connection with the carbon slide plate, so that the driving device always drives the carbon slide plate to move in the process of the straight line part of the catenary being in contact with the carbon slide plate, the contact position of the carbon slide plate and the catenary is constantly changed on the passive friction part, the same position of the straight line part and the carbon slide plate is prevented from being rubbed for a long time, the local pits of the carbon slide plate are avoided, the carbon slide plate and the catenary are prevented from being corroded, and the normal use of the catenary and the carbon slide plate is further affected.

Description

Technical Field

[0001] This invention relates to the field of pantograph carbon sliding plate technology, and in particular to a control system and control method for achieving uniform wear of pantograph carbon sliding plates. Background Technology

[0002] Currently, rail transit trains generally use a pantograph carbon sliding contact method to obtain electrical energy through sliding contact between the pantograph carbon sliding contact plate and the overhead contact wire. In order to evenly distribute the friction and wear on the surface of the carbon sliding contact plate, the contact wire is usually arranged in a "zigzag" shape, that is, a sine wave, so that the contact point between the carbon sliding contact plate and the contact wire moves back and forth along the length of the carbon sliding contact plate, thereby avoiding local overheating and excessive wear, and extending the service life of the carbon sliding contact plate.

[0003] However, the aforementioned zigzag wiring method still has significant drawbacks in practical applications. Specifically, there is a section of the overhead contact line that is approximately parallel to the longitudinal direction of the train in the peak and trough regions of the sinusoidal waveform, with an extremely low slope. When the pantograph's carbon contactor slides into this section, the relative movement between the carbon contactor and the overhead contact line in the longitudinal direction is minimal, and their lateral positional relationship tends to be fixed. The overhead contact line is essentially rubbing against the same line of the carbon contactor slide at approximately the same lateral position. With long-term train operation, the carbon contactor slide is repeatedly worn in the peak region of the overhead contact line's sinusoidal waveform, and wear pits gradually form on its two side surfaces. The wear in the middle region of the carbon contactor slide is relatively small, creating a significant height difference between the two, eventually forming a step on the surface of the carbon contactor slide. When the high-voltage overhead contact line slides from the sinusoidal waveform position towards the middle region of the carbon contactor slide, a jump gap is easily generated at the step, causing offline arcing between the overhead contact line and the carbon contactor slide. The electric arc generated by the arcing will burn the surface of the overhead contact line and the carbon contactor slide, forming scorched protrusions and pits on both surfaces, respectively. When the pantograph carbon sliding plate of a subsequent train passes over the scorched area, the sparking phenomenon is further aggravated, forming a vicious cycle that seriously threatens the safety of train operation. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, this application provides a control system and control method for achieving uniform wear of the pantograph carbon sliding plate.

[0005] A control system for achieving uniform wear of a pantograph carbon sliding plate includes a drive unit and a carbon sliding plate connected to the drive end of the drive unit. The drive unit is mounted on a carriage, and the movement direction of the carbon sliding plate is perpendicular to the forward direction of the carriage. The carbon sliding plate contacts the overhead contact line. The carbon sliding plate includes an active friction part and a passive friction part. The overhead contact line includes a tending-to-straight part for contacting the active friction part and an inclined part for contacting the passive friction part. During the contact between the tending-to-straight part and the carbon sliding plate, the drive unit continuously drives the carbon sliding plate to move.

[0006] As one embodiment, it also includes a detection system for detecting train speed. The detection system is connected to a slope monitor for monitoring the slope of the inclined section. The detection system is equipped with an input terminal for inputting the length of each segment of the straight section, the length of each segment of the inclined section, the length of the active friction section, and the length of the passive friction section. Both the detection system and the slope monitor are connected to a processor. The processor transmits the processed data to an execution system. The execution system controls the driving speed and driving time of the drive device.

[0007] As one embodiment, the detection system is connected to a laser scanning system for scanning and storing the lengths of the tending straight and inclined portions.

[0008] In one embodiment, two active friction parts are symmetrically arranged, and the passive friction part is located between the two symmetrically arranged active friction parts.

[0009] In one embodiment, the drive device includes a motor mounted on the carriage, a gear mounted on the output shaft of the motor, and a rack meshing with the gear mounted on the carbon slide plate.

[0010] As one embodiment, the shortest distance between the extensions of two adjacent tending straight sections in the length direction is equal to the length of the passive friction section.

[0011] As one embodiment, a dividing line is provided at the connection position between the active friction part and the passive friction part. The dividing line coincides with the starting point of the corresponding active friction part, and the ending point of the active friction part is far away from the passive friction part. When the tending straight part contacts the active friction part, the driving device drives the carbon slide plate to move back and forth. The distance that the driving device drives the carbon slide plate to move is equal to an even multiple of the distance between the starting point and the ending point of the active friction part.

[0012] As one embodiment, the distance between the start and end points of the same active friction part is less than the length of the active friction part.

[0013] As one embodiment, when the linear portion comes into contact with the active friction portion, the distance that the driving device moves the carbon slide plate is equal to twice the distance between the starting point and the ending point of the active friction portion.

[0014] A control method for achieving uniform wear of the pantograph carbon sliding plate, using the above-mentioned control system, includes the following steps: S1: The laser scanning system inputs the length of each straight section and the length of each inclined section of the contact wire to the input end of the detection system; S2: The detection system detects the train's speed V in real time. If the inclined part is in contact with the passive friction part of the carbon sliding plate, the slope monitor transmits the slope information of the current inclined part of the carbon sliding plate to the processor. The detection system transmits the length of the current inclined part, the length L1 of the passive friction part, and the train's speed V to the processor. If the inclined part is in contact with the active friction part of the carbon sliding plate, the detection system transmits the length of the current inclined part, the length L2 of the active friction part, and the train's speed V to the processor. S3: The processor receives data from the detection system and the slope monitor. It uses the slope information transmitted by the slope monitor to determine whether the position where the carbon slide plate contacts the contact wire is an inclined part. If it is determined to be an inclined part, the processor calculates the time t1 required for the carbon slide plate to maintain contact with the current inclined part and transmits t1 to the execution system. If it is determined that the current position is not an inclined part, the processor calculates the time t2 required for the carbon slide plate to contact the current tending straight part and the real-time speed n of the motor. S4: The execution system receives data from the processor. If only time t1 is received, the execution system controls the motor to start after time t1. If time t2 and speed n are received simultaneously, the execution system controls the motor to run continuously at speed n until the running time reaches t2. When the motor is working at speed n, the carbon slide plate moves back and forth at a steady speed, so that the contact position between the carbon slide plate and the contact wire gradually moves from the starting point of the active friction part to the ending point of the active friction part, and then moves from the ending point of the active friction part back to the starting point of the active friction part.

[0015] The beneficial effects of this application are: This invention provides an active friction part and a passive friction part on the carbon slide plate, and connects a drive device to the carbon slide plate. This allows the drive device to continuously move the carbon slide plate during the contact process between the linear portion of the contact wire and the carbon slide plate. This causes the contact position between the carbon slide plate and the contact wire to constantly change on the passive friction part, preventing prolonged friction between the linear portion and the carbon slide plate at the same location from causing localized pitting on the carbon slide plate, which would lead to corrosion of both the carbon slide plate and the contact wire, thus affecting the normal use of both.

[0016] Other technical solutions of the present invention can also achieve the following technical effects: The execution system of this application can determine the train's current speed V and the length L of the current section approaching a straight line. bThe motor speed n is controlled in real time to achieve precise fine-tuning. The slope monitor, which monitors the inclination of the contact wire in real time, provides feedback for the motor rotation. When the contact wire encounters slight fluctuations, the motor speed is finely adjusted to adjust the speed at which the carbon sliding plate is pulled out laterally. This ensures that the contact wire wears the carbon sliding plate evenly throughout the entire process, avoiding the problem of abnormal wear caused by the contact wire only wearing the carbon sliding plate locally. It also increases the wear range of the carbon sliding plate, greatly reducing its wear and preventing abnormal wear. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the operation of the control system disclosed in the embodiments of the present invention; Figure 2 This is a schematic diagram showing the positional relationship between the straight portion and the inclined portion as disclosed in the embodiments of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the driving device disclosed in the embodiments of the present invention; Figure 4 This is a schematic diagram illustrating the control principle of the pantograph carbon sliding plate control system disclosed in the embodiments of the present invention.

[0018] In the attached figures: 1, drive device; 101, motor; 102, gear; 103, rack; 2, carbon slide plate; 201, active friction part; 202, passive friction part; 3, contact wire; 301, tending to be straight; 302, inclined part. Detailed Implementation

[0019] To make the above-mentioned objectives, features, and advantages of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] A control system for achieving uniform wear of the pantograph carbon slide plate, such as... Figures 1-3As shown, the system includes a drive unit 1 and a carbon sliding plate 2. The carbon sliding plate 2 is connected to the drive end of the drive unit 1. The drive unit 1 is mounted on the carriage and can be an electric push rod or a hydraulic push rod. The telescopic end of the electric push rod or hydraulic push rod is fixedly connected to the carbon sliding plate 2. The carbon sliding plate 2 is slidably connected to the top of the carriage. The direction of movement of the carbon sliding plate 2 is perpendicular to the direction of travel of the carriage. The carbon sliding plate 2 maintains contact with the contact wire 3 to supply power to the train. The carbon sliding plate 2 includes an active friction part 201 and a passive friction part 202, which are connected. The contact wire 3 includes components for contacting the active friction part. The contact wire 3 has a sinusoidal distribution with a linear portion 301 and an inclined portion 302 for contacting the passive friction portion 202. The linear portion 301 and the inclined portion 302 are arranged alternately. The inclination directions of two adjacent inclined portions 302 are opposite, and the axes of two adjacent linear portions 301 do not coincide. As the name suggests, the slope of the linear portion 301 is close to zero. The extension direction of the linear portion 301 can be regarded as perpendicular to the length direction of the carbon slide plate 2. The length direction of the carbon slide plate 2 is consistent with its own sliding direction. The slope of the inclined portion 302 is greater than that of the linear portion 301. When the inclined portion 302 of the contact wire 3 comes into contact with the passive friction portion 202 of the carbon slide plate 2, the inclined portion 302 has a larger slope and a more obvious inclination than the straight portion 301. This means that even if the drive device 1 does not drive the carbon slide plate 2 to move, the inclined portion 302 can still come into contact with different positions of the passive friction portion 202 under the influence of the slope. This avoids the straight portion 301 from rubbing against the same position of the carbon slide plate 2 for a long time, which would cause local pits to appear on the carbon slide plate 2 and thus affect the normal use of the contact wire 3 and the carbon slide plate 2. During the process of the straight section 301 contacting the carbon slide plate 2, the drive device 1 continuously drives the carbon slide plate 2 to move. At this time, the telescopic end of the electric push rod or hydraulic push rod extends and retracts, causing the carbon slide plate 2 to slide on the carriage, so that the contact position between the carbon slide plate 2 and the contact wire 3 changes continuously on the passive friction part 202. For example, it can first gradually move away from the passive friction part 202, and then gradually move closer to the passive friction part 202, thereby forming a reciprocating movement, avoiding long-term friction between the straight section 301 and the carbon slide plate 2 at the same position, which would cause local pits to appear on the carbon slide plate 2.

[0021] In one embodiment, a detection system for detecting train speed is also included. The detection system is connected to a slope monitor, which can monitor the slope of each inclined section 302. The detection system is provided with an input terminal, which can be an input device. Both the detection system and the slope monitor are connected to a processor. The processor transmits the processed data to an execution system. The execution system can control the driving speed and driving time of the drive device 1. The detection system is connected to a laser scanning system for scanning and storing the lengths of the linear section 301 and the inclined section 302. The laser scanning system can also calibrate the positions of the linear section 301 and the inclined section 302. The laser scanning system can input the lengths of each linear section 301, the inclined section 302, and the lengths of the active friction section 201 and the passive friction section 202 through the input terminal of the detection system, thereby achieving automated control. This not only improves work efficiency but also improves accuracy and reduces human error.

[0022] In one embodiment, such as Figure 1 As shown, there are two symmetrically arranged active friction parts 201, which are in contact with the straightening parts 301 at different positions of the contact wire 3. The passive friction part 202 is located between the two symmetrically arranged active friction parts 201. The two straightening parts 301 have the same length, and the length direction of the straightening part 301 corresponds to the running direction of the train. The shortest distance between the extension lines of the length directions of two adjacent straightening parts 301 is equal to the length of the passive friction part 202, so that each inclined part 302 can fall entirely in the area where the passive friction part 202 is located.

[0023] In one embodiment, such as Figure 3 As shown, the drive unit 1 includes a motor 101, which is mounted on the carriage. The axis of the output shaft of the motor 101 is aligned with the direction of travel of the train. A gear 102 is mounted on the output shaft of the motor 101. A rack 103 that meshes with the gear 102 is mounted below the carbon slide plate 2. The motor 101 is located below the rack 103. The carbon slide plate 2 is slidably mounted on the top of the carriage via a connecting frame.

[0024] In one embodiment, a dividing line is provided at the connection position between the active friction part 201 and the passive friction part 202. The dividing line coincides with the starting point of the corresponding active friction part 201. The ending point of the active friction part 201 is far away from the passive friction part 202. When the straight part 301 contacts the active friction part 201, the driving device 1 drives the carbon slide plate 2 to move back and forth. During this period, the distance that the driving device 1 drives the carbon slide plate 2 to move is equal to an even multiple of the distance between the starting point and the ending point of the active friction part 201. This makes the position where the contact wire 3 contacts the carbon slide plate 2 return to the position when the driving device 1 starts. This makes it easier for the subsequent inclined part 302 to directly contact the passive friction part 202 of the carbon slide plate 2. The distance between the starting point and the ending point of the same active friction part 201 is less than the length of the active friction part 201, thus leaving a margin to avoid the contact wire 3 accidentally detaching from the carbon slide plate 2 when it contacts the end of the carbon slide plate 2. It should be explained that the length direction of the active friction part 201 is perpendicular to the forward direction of the train and parallel to the horizontal plane. When the straight section 301 comes into contact with the active friction section 201, the distance that the drive device 1 moves the carbon slide plate 2 is equal to twice the distance between the starting point and the ending point of the active friction section 201, that is, one reciprocating motion.

[0025] A method for controlling uniform wear of the pantograph carbon sliding plate, using the control system described in the above embodiments, such as... Figures 1-4 As shown, it includes the following steps: S1: The laser scanning system inputs the length of each straight section 301 and the length of each inclined section 302 of the contact wire 3 to the input end of the detection system; S2: The detection system detects the train's speed V in real time. If the inclined part 302 is in contact with the passive friction part 202 of the carbon slide plate 2, the slope monitor transmits the slope information of the current inclined part 302 of the carbon slide plate 2 to the processor. The detection system transmits the length of the current inclined part 302, the length L1 of the passive friction part 202, and the train's speed V to the processor. If the straight part 301 is in contact with the active friction part 201 of the carbon slide plate 2, the detection system transmits the length of the current straight part 301, the distance L2 between the start and end points of the active friction part 201, and the train's speed V to the processor. S3: The processor receives data from the detection system and the slope monitor. It determines whether the position where the carbon slide plate 2 contacts the contact wire 3 is the inclined part 302 based on the slope information transmitted by the slope monitor. If it is determined to be the inclined part 302, the processor calculates the time t1 required for the carbon slide plate 2 to maintain contact with the current inclined part 302 and transmits t1 to the execution system. If it is determined that the current position is not the inclined part 302, the processor calculates the time t2 required for the carbon slide plate 2 to contact the current tending straight part 301 and the real-time speed n of the motor 101. Based on the slope of the inclined section 302, the angle β between the train's direction of travel and the current inclined section 302 can be calculated. Given the angle β and the length L of the current inclined section 302, the length L of the current inclined section 302 in the train's direction of travel can be calculated using the Pythagorean theorem. a Based on the train's speed V, the time t1 required for the carbon slide plate 2 to pass the current inclined section 302 can be calculated. The specific calculation steps are as follows: Furthermore, since the extension direction of the straightening section 301 is almost identical to the train's direction of travel, it is possible to directly pass through the current length L of the straightening section 301. b The time t2 required for the carbon slide plate 2 to pass through the current straight section 301 is calculated based on the train's speed V, i.e.: Since the carbon slide plate 2 performs one reciprocating movement, the distance it moves laterally along its length is 2L2. Assuming the lateral speed of the carbon slide plate 2 is V1 and the pitch circle radius of the gear 102 is R, then according to... It can be concluded that because Since C is a constant, we can conclude that... S4: The execution system receives data from the processor. If only time t1 is received, the execution system controls the motor 101 to start after time t1. If time t2 and speed n are received simultaneously, the execution system controls the motor 101 to run continuously at speed n until the running time reaches t2. When the motor 101 is working at speed n, the carbon slide plate 2 moves back and forth at a steady speed, so that the contact position between the carbon slide plate 2 and the contact wire 3 gradually moves from the starting point of the active friction part 201 to the ending point of the active friction part 201, and then moves from the ending point of the active friction part 201 back to the starting point of the active friction part 201.

[0026] In summary, the execution system of this application can determine the train's current speed V and the length L of the currently straight section 301 based on the train's current speed V and the length of the straight section 301. bThe speed n of motor 101 is controlled in real time to achieve precise fine-tuning. The slope monitor, which monitors the slope of the contact wire 3 in real time, provides feedback for the rotation of motor 101. When the contact wire 3 encounters slight fluctuations, the motor 101 is fed back to fine-tune its speed and adjust the speed at which the carbon slide plate 2 is pulled out laterally. This ensures that the contact wire 3 wears evenly throughout the entire process of contact with the carbon slide plate 2, avoiding the problem of abnormal wear caused by the contact wire 3 only wearing the carbon slide plate 2 in a localized area. It also increases the wear range of the carbon slide plate 2, greatly reducing the wear of the carbon slide plate 2 and preventing abnormal wear of the carbon slide plate 2.

[0027] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A control system for achieving uniform wear of the pantograph carbon sliding plate, characterized in that, The device includes a drive unit (1) and a carbon slide plate (2) connected to the drive end of the drive unit (1). The drive unit (1) is installed on the carriage. The moving direction of the carbon slide plate (2) is perpendicular to the forward direction of the carriage. The carbon slide plate (2) contacts the contact wire (3). The carbon slide plate (2) includes an active friction part (201) and a passive friction part (202). The contact wire (3) includes a straightening part (301) for contacting the active friction part (201) and an inclined part (302) for contacting the passive friction part (202). During the process of the straightening part (301) contacting the carbon slide plate (2), the drive unit (1) always drives the carbon slide plate (2) to move.

2. The control system for achieving uniform wear of the pantograph carbon sliding plate according to claim 1, characterized in that, It also includes a detection system for detecting the train's speed. The detection system is connected to a slope monitor for monitoring the slope of the inclined section (302). The detection system is equipped with an input terminal for recording the length of each segment of the straight section (301), the length of each segment of the inclined section (302), the length of the active friction section (201), and the length of the passive friction section (202). The detection system and the slope monitor are both connected to a processor. The processor transmits the processed data to an execution system. The execution system controls the driving speed and driving time of the drive device (1).

3. The control system for achieving uniform wear of the pantograph carbon sliding plate according to claim 2, characterized in that, The detection system is connected to a laser scanning system for scanning and storing the lengths of the tending straight portion (301) and the inclined portion (302).

4. The control system for achieving uniform wear of the pantograph carbon sliding plate according to claim 3, characterized in that, Two active friction parts (201) are symmetrically arranged, and the passive friction part (202) is located between the two symmetrically arranged active friction parts (201).

5. The control system for achieving uniform wear of the pantograph carbon sliding plate according to claim 3, characterized in that, The drive device (1) includes a motor (101), which is mounted on the carriage. A gear (102) is mounted on the output shaft of the motor (101), and a rack (103) that meshes with the gear (102) is mounted on the carbon slide plate (2).

6. The control system for achieving uniform wear of the pantograph carbon sliding plate according to claim 3, characterized in that, The shortest distance between the extensions of two adjacent tending straight sections (301) in the length direction is equal to the length of the passive friction section (202).

7. The control system for achieving uniform wear of the pantograph carbon sliding plate according to claim 3, characterized in that, A dividing line is provided at the connection position between the active friction part (201) and the passive friction part (202). The dividing line coincides with the starting point of the corresponding active friction part (201). The ending point of the active friction part (201) is far away from the passive friction part (202). When the tending straight part (301) contacts the active friction part (201), the driving device (1) drives the carbon slide plate (2) to move back and forth. The distance that the driving device (1) drives the carbon slide plate (2) to move is equal to an even multiple of the distance between the starting point and the ending point of the active friction part (201).

8. The control system for achieving uniform wear of the pantograph carbon sliding plate according to claim 7, characterized in that, The distance between the start and end points of the same active friction part (201) is less than the length of the active friction part (201).

9. A control system for achieving uniform wear of a pantograph carbon sliding plate according to claim 7, characterized in that, When the linear portion (301) comes into contact with the active friction portion (201), the distance that the driving device (1) moves the carbon slide plate (2) is equal to twice the distance between the starting point and the ending point of the active friction portion (201).

10. A method for controlling uniform wear of a pantograph carbon slide plate, using the control system described in any one of claims 3-9, characterized in that, Includes the following steps: S1: The laser scanning system inputs the length of each straight section (301) and the length of each inclined section (302) of the contact wire (3) to the input end of the detection system; S2: The detection system detects the train's speed V in real time. If the inclined part (302) is in contact with the passive friction part (202) of the carbon slide plate (2), the slope monitor transmits the slope information of the current inclined part (302) of the carbon slide plate (2) to the processor. The detection system transmits the length of the current inclined part (302), the length L1 of the passive friction part (202), and the train's speed V to the processor. If the tending straight part (301) is in contact with the active friction part (201) of the carbon slide plate (2), the detection system transmits the length of the current tending straight part (301), the length L2 of the active friction part (201), and the train's speed V to the processor. S3: The processor receives data from the detection system and the slope monitor. It uses the slope information transmitted by the slope monitor to determine whether the position where the carbon slide plate (2) contacts the contact wire (3) is an inclined part (302). If it is determined to be an inclined part (302), the processor calculates the time t1 required for the carbon slide plate (2) to maintain contact with the current inclined part (302) and transmits t1 to the execution system. If it is determined that the current position is not an inclined part (302), the processor calculates the time t2 required for the carbon slide plate (2) to contact the current tending straight part (301) and the real-time speed n of the motor (101). S4: The execution system receives data from the processor. If only time t1 is received, the execution system controls the motor (101) to start after time t1. If time t2 and speed n are received at the same time, the execution system controls the motor (101) to run continuously at speed n until the running time reaches t2. When the motor (101) is working at speed n, the carbon slide plate (2) moves back and forth at a steady speed, so that the contact position between the carbon slide plate (2) and the contact wire (3) gradually moves from the starting point of the active friction part (201) to the ending point of the active friction part (201), and then moves from the ending point of the active friction part (201) back to the starting point of the active friction part (201).

Images