Regulation and control device and method for improving discharge particles of current collection system

Abstract

The invention discloses a regulation and control device and method for improving discharge particles of a current collection system. The regulation and control device comprises a discharge particle storage box, a close winding solenoid assembly and a PC connected with a pressure sensor, a partial discharge detector and a current signal generator. The PC is used for receiving the contact pressure uploaded by the pressure sensor, and when the contact pressure changes, a preset current is introduced into the close winding solenoid assembly through the current signal generator to generate a magnetic field, so that the discharge particles in the friction disc move towards the opening direction of the discharge particle storage box; and the starting module is used for starting the partial discharge detector to detect the discharge frequency of discharge particles in the friction disc, and when the discharge frequency is greater than a preset frequency, the current signal generator increases the current introduced into the close-wound solenoid assembly to enhance the magnetic field until the discharge frequency detected by the partial discharge detector is less than the preset frequency.

Description

Technical Field

[0001] The invention relates to a safety control technology for a train power collection system, and in particular to a control device and method for improving discharge particles in a power collection system. Background Art

[0002] The current collection system is an important component for the normal operation of the train. The train introduces current into the train through the pantograph, and then the current collection system introduces the current into the ground, thus forming a complete current loop. In the current collection system, the stability of the carbon brush and friction disk will directly affect the current collection quality and operating status of the train.

[0003] With the advancement of high-speed trains, the current carrying capacity of trains is gradually increasing, and the speed of trains is getting faster and faster, which leads to the gradual increase of wear on carbon brushes and motors. At the same time, because the pressure between the friction discs and carbon brushes on both sides is changing dynamically during the movement of the train, eccentric wear and other conditions often occur depending on the movement, resulting in increased wear of the carbon brush on one side and increased content of wear debris. Moreover, since these wear debris are charged and called discharge particles, when the discharge particles are generated to a certain extent, they will accumulate in large quantities, which will cause internal discharge, causing consumption of the motor and affecting the service life of the motor.

[0004] At the same time, the movement of the discharge particles inside will produce certain electromagnetic interference, intensify the vibration of the motor, and shorten the replacement cycle of the motor and carbon brushes. This will greatly increase the maintenance cost and maintenance cycle of the collection system, reduce the service life of the carbon brushes and motors, and in severe cases may even cause accidents, resulting in irreparable loss of life and property. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a control device and method for improving the discharge particles of the power collection system, which solves the problem that a large amount of discharge particles accumulated in the train wheels discharge inside the wheels, causing consumption of the motor and reducing the service life of the motor.

[0006] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0007] In a first aspect, a control device for improving discharge particles of a current collection system is provided, comprising:

[0008] A discharge particle storage box is placed in the friction disk, a magnet is arranged inside the box, and the box has an opening for the discharge particles to enter, and the opening is located on a side of the discharge particle storage box that faces the same tangent line as the friction disk;

[0009] A closely wound solenoid assembly is placed inside the wheel and in contact with the friction disc, and is connected to a DC power source through a current signal generator to generate a magnetic field, so that the discharge particles in the friction disc move toward the opening of the discharge particle storage box;

[0010] A pressure sensor is disposed between the carbon brush and the friction disk and is used to collect the contact pressure between the carbon brush and the friction disk;

[0011] A plurality of partial discharge detectors are respectively arranged at different positions of the side wall of the friction disk, and are used to detect the discharge frequency of the discharge particles in the friction disk;

[0012] The PC is connected to the current signal generator, the pressure sensor and the partial discharge detector respectively, and is used to receive the contact pressure uploaded by the pressure sensor, and when the contact pressure changes, a preset current is passed through the current signal generator into the tightly wound solenoid assembly to generate a magnetic field, so that the discharge particles in the friction disk move toward the opening direction of the discharge particle storage box;

[0013] It is used to start multiple local discharge detectors to detect the discharge frequency of the discharge particles in the friction disk. When the maximum discharge frequency is greater than the preset frequency, the current passing through the closely wound solenoid assembly is increased through the current signal generator to enhance the magnetic field until the maximum discharge frequency detected by the multiple local discharge detectors is less than the preset frequency.

[0014] Furthermore, the closely wound solenoid assembly comprises at least one transverse solenoid arranged on the lower surface of a carbon brush and a vertical solenoid arranged perpendicularly to the lower surface of each transverse solenoid, the transverse solenoid and the vertical solenoid are both located inside the wheel, and the vertical solenoid is in contact with the friction disk; the transverse solenoid is located parallel to the tangent of a circle formed by a plurality of carbon brushes; all transverse solenoids and all vertical solenoids are respectively connected to an independent DC power supply via a current signal generator;

[0015] The PC also includes controlling two current signal generators to respectively supply current to the horizontal solenoid and the vertical solenoid, so that the horizontal solenoid generates a magnetic field that causes the discharge particles to move from the carbon brush to the bottom surface of the friction disk, and the vertical solenoid generates a magnetic field that causes the discharge particles to move toward the opening direction of the discharge particle storage box.

[0016] Furthermore, the surface of the horizontal solenoid is coated with insulating paint, and the vertical solenoid is arranged in a shielding cover.

[0017] Furthermore, the control device for improving the discharge particles of the current collection system also includes a first charge sensor arranged in the friction disk and connected to the PC. When the discharge frequency is greater than the preset frequency, the charge of the discharge particles in the friction disk is collected. The PC calculates the magnetic field strength generated in the horizontal solenoid and the vertical solenoid according to the charge of the discharge particles, and calculates the current passing through the horizontal solenoid and the vertical solenoid according to the magnetic field strength of the horizontal solenoid and the vertical solenoid.

[0018] Furthermore, the calculation method of the magnetic field strength and current in the horizontal solenoid and the vertical solenoid is the same;

[0019] The PC calculates the magnetic field strength generated by the transverse solenoid according to the charge of the discharged particles, and the method for calculating the current flowing into the transverse solenoid according to the magnetic field strength includes:

[0020] A1. Determine the number of discharged particles according to the charge of the discharged particles and the charge of a single discharged particle;

[0021] A2. Determine the total mass of all discharged particles based on the number of discharged particles and the mass of a single particle;

[0022] A3. According to the charge and total mass of the discharged particles, calculate the force generated by the discharged particles when the carbon brush is energized:

[0023] F=F 洛 +F 向 +F 空阻 +F 电 +F 重

[0024] F 洛 =q(B1v+E)★sin(v,B1),

[0025] F 电 =Eq,F 重 = mg,

[0026] Where, F is the force; F 洛 、F 向 and F 重 are the Lorentz force, centripetal force and gravity acting on the discharge particles respectively; F 空阻 and F 电are the air resistance and electric field force on the discharge particles; q is the charge of the discharge particles; B1 and E are the magnetic field strength and electric field strength generated by the current flowing through the carbon brush; v is the speed of the discharge particles under the action of the magnetic field strength B1; m is the total mass of the discharge particles; C is the air resistance; ρ is the air density; S is the windward volume of the discharge particles; g is the gravitational acceleration; r1 is the radius of the circle formed by all carbon brushes;

[0027] A4. Calculate the magnetic field strength generated by the transverse solenoid based on the force F of the discharged particles:

[0028]

[0029] Where B2 is the magnetic field strength generated by the transverse solenoid;

[0030] A5. Calculate the current I flowing into the transverse solenoid based on the magnetic field strength B2:

[0031]

[0032] Where μ0 is the magnetic permeability in a vacuum; r2 is the distance between the magnetic field generated by the closely wound solenoid assembly and the current generated in the carbon brush.

[0033] Furthermore, the discharge particle storage box is placed on the circumference of a circle formed by a plurality of carbon brushes, and two side surfaces thereof pass through the tangent line.

[0034] Furthermore, the control device for improving the discharge particles of the current collection system also includes a second charge sensor arranged in the discharge particle storage box and connected to the PC, which is used to collect the charge of the discharge particles collected in the discharge particle storage box. When the charge of the collected discharge particles is greater than the preset charge, the PC notifies the management personnel to clean the discharge particle storage box.

[0035] Furthermore, the model of the pressure sensor is Honeywell PX2, the model of the partial discharge detector is Hikvision PPM2000; and the model of the first charge sensor is Honeywell's Hall effect sensor.

[0036] In a second aspect, a control method for improving a control device for regulating discharge particles of a current collection system is provided, comprising the steps of:

[0037] S1, receiving the contact pressure uploaded by the pressure sensor. When the contact pressure changes, it indicates that the train has started, and then the current signal generator and multiple partial discharge detectors are turned on;

[0038] S2, controlling the current signal generator to pass a preset current into the horizontally tightly wound solenoid and the vertically tightly wound solenoid to generate a magnetic field, so that the discharge particles in the friction disk move toward the opening direction of the discharge particle storage box;

[0039] S3, receiving the discharge frequencies of the discharge particles in the friction disk detected by multiple partial discharge detectors, and selecting the maximum discharge frequency;

[0040] S4, determine whether the maximum discharge frequency is greater than the preset frequency, if so, proceed to step S5, otherwise return to step S3;

[0041] S5, controlling the current signal generator to increase the current flowing into the horizontally closely wound solenoid and the vertically closely wound solenoid respectively to enhance the magnetic field, and then returning to step S3 until the maximum discharge frequency is less than or equal to the preset frequency.

[0042] Furthermore, when a first charge sensor is provided in the friction disk, the PC calculates the magnetic field strength generated in the horizontal solenoid and the vertical solenoid according to the charge amount of the discharged particles, and calculates the current passed into the horizontal solenoid and the vertical solenoid according to the magnetic field strength of the horizontal solenoid and the vertical solenoid.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 1) This solution determines the movement of the train through the setting of a closely wound solenoid assembly and the change in the value of the pressure sensor. At this time, the PC will give an instruction to the current signal generator to control the current of the closely wound solenoid assembly to generate a magnetic field strength, control the carbon brush discharge particles to make circular motion inside the wheel, and then capture the moving particles into the discharge particle storage box through the action of the magnet in the discharge particle storage box, thereby reducing possible electromagnetic interference and extending the service life of the motor.

[0045] The magnets arranged in the discharge particle storage box can adsorb the incoming discharge particles to prevent the discharge particles from overflowing during the rotation of the wheel.

[0046] 2) This solution can determine the amount of charge of the particles brought by the friction disk through the first charge sensor set in the friction disk. Combined with the frequency of local discharge detected by the local discharge detector, it can more accurately calculate the magnetic field strength that needs to be generated in the horizontal solenoid and the vertical solenoid, and then determine the current size passed into the horizontal solenoid and the vertical solenoid through the current signal generator to control the discharge particles to enter the discharge particle storage box, thereby slowing down the discharge frequency and retaining as many as possible in the discharge particle storage box, thereby controlling the distribution of the discharge particles inside the wheel.

[0047] 3) The purpose of placing multiple partial discharge detectors inside the wheel is to control the size of the current signal generated by the current signal generator based on the comparison of the maximum discharge frequency generated by the partial discharge with the threshold set by the PC, change the size of the magnetic field, control the movement trajectory of the discharge particles, and collect the discharge particles into the discharge particle storage box by controlling the directional movement of the discharge particles, thereby reducing the free discharge particles and controlling the frequency of partial discharge.

[0048] 4) When the device of this solution is applied to the carbon brush of a train, there is no need to significantly change the original structure, which effectively saves costs and further improves the feasibility and convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 The schematic diagram of the control device for improving the discharge particles of the power collection system is shown in FIG.

[0050] Figure 2 This solution does not show the structural schematic diagram of the control device of the partial discharge detector being placed inside the friction disk of the wheel.

[0051] Figure 3 This is a schematic diagram of the structure in which the control device of the discharge particle storage box not shown in this solution is placed in the friction disk of the wheel.

[0052] Figure 4 This is a schematic diagram of the discharge particles entering the discharge particle storage box under the action of the magnetic field.

[0053] Figure 5 The present invention is a flow chart of a control method for improving a control device for regulating discharge particles of a current collection system.

[0054] Among them, 1. carbon brush; 2. friction disk; 21. bottom surface of friction disk; 3. partial discharge detector; 4. closely wound solenoid assembly; 41. horizontal solenoid; 42. vertical solenoid; 5. discharge particle storage box; 51. opening; 52. magnet; 6. first charge sensor; 7. second charge sensor. DETAILED DESCRIPTION

[0055] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0056] like Figures 1 to 4As shown, the control device for improving the discharge particles of the current collection system provided in this scheme includes a discharge particle storage box 5, a tightly wound solenoid assembly 4, a pressure sensor, a current signal generator, a partial discharge detector 3 and a PC, and the current signal generator, the pressure sensor and the partial discharge detector 3 are all connected to the PC.

[0057] like Figure 2 As shown, the discharge particle storage box 5 is placed in the friction disk 2, and a magnet 52 is arranged inside the box, which has an opening 51 for the discharge particles to enter, and the opening 51 is located on a side of the discharge particle storage box 5 that faces the same tangent as the friction disk 2. The magnet 52 is a strong magnetic magnet, which can be a permanent magnet or a magnet that generates magnetism when powered on, similar to a tightly wound solenoid.

[0058] The purpose of setting the magnet is to adsorb the incoming discharge particles to prevent the discharge particles from overflowing due to the rotation of the wheel.

[0059] During implementation, this solution preferably places the discharge particle storage box 5 on the circumference of the circle formed by multiple carbon brushes 1, and its two side surfaces pass through the tangent; in this way, when the discharge particles are affected by the magnetic field, they can enter the discharge particle storage box 5 more efficiently.

[0060] like Figure 2 and Figure 3 As shown, the tightly wound solenoid assembly 4 is placed inside the wheel and contacts the friction disc 2 , and is connected to a DC power source via a current signal generator to generate a magnetic field, causing the discharge particles in the friction disc 2 to move toward the opening 51 of the discharge particle storage box 5 .

[0061] A pressure sensor (not shown in the drawings provided in this solution) is arranged between the carbon brush 1 and the friction disk 2 to collect the contact pressure between the carbon brush 1 and the friction disk 2; Figure 4 As shown, a plurality of partial discharge detectors 3 are respectively arranged at different positions of the side wall of the friction disc 2 to detect the discharge frequency of the discharge particles in the friction disc 2 .

[0062] The PC of this solution is used to receive the contact pressure uploaded by the pressure sensor, and when the contact pressure changes, a preset current is passed into the tightly wound solenoid assembly 4 through the current signal generator to generate a magnetic field, so that the discharge particles in the friction disk 2 move toward the opening 51 of the discharge particle storage box 5.

[0063] The PC is used to start the partial discharge detector 3 to detect the discharge frequency of the discharge particles in the friction disk 2. When the discharge frequency is greater than the preset frequency, the current passing through the closely wound solenoid assembly 4 is increased through the current signal generator to enhance the magnetic field until the discharge frequency detected by the partial discharge detector 3 is less than the preset frequency.

[0064] In one embodiment of the present invention, the closely wound solenoid assembly 4 comprises at least one transverse solenoid 41 arranged on the lower surface of the carbon brush 1 and a vertical solenoid 42 arranged perpendicularly to the lower surface of each transverse solenoid 41, the transverse solenoid 41 and the vertical solenoid 42 are both located inside the wheel, and the vertical solenoid 42 is in contact with the friction disc 2; the transverse solenoid 41 is located parallel to the tangent of the circle formed by the plurality of carbon brushes 1; all the transverse solenoids 41 and all the vertical solenoids 42 are respectively connected to an independent DC power supply through a current signal generator;

[0065] The PC also includes controlling two current signal generators to respectively supply current to the horizontal solenoid 41 and the vertical solenoid 42, so that the horizontal solenoid 41 generates a magnetic field that causes the discharge particles to move from the carbon brush 1 to the bottom surface 21 of the friction disk, and the vertical solenoid 42 generates a magnetic field that causes the discharge particles to move toward the opening 51 of the discharge particle storage box 5.

[0066] After the close-wound solenoid assembly 4 of this solution adopts the above arrangement, the discharge particle storage box 5 can be directly fixed on the bottom surface 21 of the friction disk, and the discharge particles move obliquely downward ( Figure 2-Figure 3 The spiral motion of the product structure (from the perspective of the product structure shown) facilitates the installation of the discharge particle storage box 5, and also facilitates the control of the magnetic field direction of the horizontal solenoid 41 and the vertical solenoid 42.

[0067] In order to improve the service life of the tightly wound solenoid assembly 4, in this solution, the surface of the horizontal solenoid 41 is preferably coated with insulating paint, and the vertical solenoid 42 is arranged in a shielding cover.

[0068] During implementation, the present scheme is preferably used to improve the control device of the discharge particles of the power collection system, and also includes a first charge sensor 6 arranged in the friction disk 2 and connected to the PC. When the discharge frequency is greater than the preset frequency, the charge of the discharge particles in the friction disk 2 is collected. The PC calculates the magnetic field strength generated in the horizontal solenoid 41 and the vertical solenoid 42 according to the charge of the discharge particles, and calculates the current passing through the horizontal solenoid 41 and the vertical solenoid 42 according to the magnetic field strength of the horizontal solenoid 41 and the vertical solenoid 42.

[0069] In one embodiment of the present invention, the calculation method of the magnetic field strength and current in the horizontal solenoid 41 and the vertical solenoid 42 is the same;

[0070] The PC calculates the magnetic field strength generated by the transverse solenoid 41 according to the charge of the discharged particles, and calculates the current flowing into the transverse solenoid 41 according to the magnetic field strength, including:

[0071] A1. Determine the number of discharged particles according to the charge of the discharged particles and the charge of a single discharged particle;

[0072] A2. Determine the total mass of all discharged particles based on the number of discharged particles and the mass of a single particle. A3. Calculate the force generated by the discharged particles when the carbon brush 1 is energized based on the charge and total mass of the discharged particles:

[0073] F=F 洛 +F 向 +F 空阻 +F 电 +F 重

[0074] F 洛 =q(B1V+E)★sin(v,B1),

[0075] F 电 =Eq,F 重 = mg,

[0076] Where, F is the force; F 洛 、F 向 and F 重 are the Lorentz force, centripetal force and gravity acting on the discharge particles respectively; F 空阻 and F 电 are the air resistance and electric field force on the discharge particles; q is the charge of the discharge particles; B1 and E are the magnetic field strength and electric field strength generated by the current flowing through the carbon brush; v is the speed of the discharge particles under the action of the magnetic field strength B1; m is the total mass of the discharge particles; C is the air resistance; ρ is the air density; S is the windward volume of the discharge particles; g is the gravitational acceleration; r1 is the radius of the circle formed by all carbon brushes;

[0077] A4. Calculate the magnetic field strength generated by the transverse solenoid 41 based on the force F of the discharged particles:

[0078]

[0079] Wherein, B2 is the magnetic field strength generated by the transverse solenoid 41;

[0080] A5. Calculate the current I flowing into the transverse solenoid 41 according to the magnetic field strength B2:

[0081]

[0082] Wherein, μ0 is the magnetic permeability in vacuum; r2 is the distance between the magnetic field generated by the closely wound solenoid assembly 4 and the current generated in the carbon brush 1.

[0083] Through the above-mentioned calculation method, this scheme can relatively accurately calculate the magnetic field strength that needs to be generated in the horizontal solenoid 41 and the vertical solenoid 42, and then determine the current passed into the horizontal solenoid 41 and the vertical solenoid 42 through the current signal generator, so as to control the discharge particles to enter the discharge particle storage box 5, thereby slowing down the discharge frequency so that as many as possible are retained in the discharge particle storage box 5, thereby controlling the distribution of the discharge particles inside the wheel.

[0084] like Figure 2 As shown, the regulating device for improving the discharge particles of the current collection system also includes a second charge sensor 7 arranged in the discharge particle storage box 5 and connected to the PC, which is used to collect the charge of the discharge particles collected in the discharge particle storage box 5. When the charge of the collected discharge particles is greater than the preset charge, the PC notifies the management personnel to clean the discharge particle storage box 5.

[0085] During implementation, the preferred pressure sensor of this scheme is a sensor with high insulation and anti-interference capabilities, whose model is Honeywell PX2; the partial discharge detector 3 uses a high insulation, anti-interference and light and easy to fix structure, whose model is Hikvision PPM2000; the first charge sensor 6 and the second charge sensor 7 are both sensors with high insulation, anti-interference, light and easy to fix, whose model is Honeywell Hall effect sensor.

[0086] refer to Figure 5 , Figure 5 A flow chart showing a control method for improving the control device of the discharge particles of the current collection system; Figure 5 As shown, the method S includes steps S1 to S5.

[0087] In step S1, the contact pressure uploaded by the pressure sensor is received. When the contact pressure changes, it indicates that the train has started, and the current signal generator and multiple partial discharge detectors 3 are turned on;

[0088] In step S2, the current signal generator is controlled to pass a preset current into the horizontally tightly wound solenoid and the vertically tightly wound solenoid to generate a magnetic field, so that the discharge particles in the friction disk 2 move toward the opening 51 of the discharge particle storage box 5;

[0089] In step S3, the discharge frequencies of the discharge particles in the friction disk 2 detected by the multiple partial discharge detectors 3 are received, and the maximum discharge frequency is selected;

[0090] In step S4, it is determined whether the maximum discharge frequency is greater than the preset frequency. If so, the process proceeds to step S5, otherwise, the process returns to step S3;

[0091] In step S5, the current signal generator is controlled to increase the current flowing into the horizontally closely wound solenoid and the vertically closely wound solenoid respectively to enhance the magnetic field, and then the process returns to step S3 until the maximum discharge frequency is less than or equal to the preset frequency.

[0092] When the first charge sensor 6 is provided in the friction disk 2, the PC calculates the magnetic field strength generated in the transverse solenoid 41 and the vertical solenoid 42 according to the charge amount of the discharged particles, and calculates the current passed into the transverse solenoid 41 and the vertical solenoid 42 according to the magnetic field strength of the transverse solenoid 41 and the vertical solenoid 42.

[0093] In summary, in the case of train operation, the present solution can regulate the magnetic field of the closely wound solenoid assembly 4 through the cooperation of the local discharge detector 3 and the first charge sensor 6, so as to move the discharge particles into the discharge particle storage box 5, thereby reducing the accumulation of discharge particles inside the wheel, thereby reducing the possible electromagnetic interference and extending the service life of the motor.

Claims

1. A control device for improving the discharge of particles in a current collection system, characterized in that: include: A discharge particle storage box is placed in the friction disk, a magnet is arranged inside the box, and the box has an opening for the discharge particles to enter, and the opening is located on a side of the discharge particle storage box that faces the same tangent line as the friction disk; A closely wound solenoid assembly is placed inside the wheel and in contact with the friction disc, and is connected to a DC power source through a current signal generator to generate a magnetic field, so that the discharge particles in the friction disc move toward the opening of the discharge particle storage box; A pressure sensor is disposed between the carbon brush and the friction disk and is used to collect the contact pressure between the carbon brush and the friction disk; A plurality of partial discharge detectors are respectively arranged at different positions of the side wall of the friction disk, and are used to detect the discharge frequency of the discharge particles in the friction disk; The PC is connected to the current signal generator, the pressure sensor and the partial discharge detector respectively, and is used to receive the contact pressure uploaded by the pressure sensor, and when the contact pressure changes, a preset current is passed through the current signal generator into the tightly wound solenoid assembly to generate a magnetic field, so that the discharge particles in the friction disk move toward the opening direction of the discharge particle storage box; It is used to start multiple local discharge detectors to detect the discharge frequency of the discharge particles in the friction disk. When the maximum discharge frequency is greater than the preset frequency, the current passing through the closely wound solenoid assembly is increased through the current signal generator to enhance the magnetic field until the maximum discharge frequency detected by the multiple local discharge detectors is less than the preset frequency.

2. The control device for improving discharge particles of a current collection system according to claim 1, characterized in that: The closely wound solenoid assembly comprises at least one transverse solenoid arranged on the lower surface of a carbon brush and a vertical solenoid arranged perpendicularly to the lower surface of each transverse solenoid, wherein the transverse solenoid and the vertical solenoid are both located inside the wheel, and the vertical solenoid is in contact with the friction disk; the transverse solenoid is located parallel to the tangent of a circle formed by a plurality of carbon brushes; all the transverse solenoids and all the vertical solenoids are respectively connected to an independent DC power supply through a current signal generator; The PC also includes controlling two current signal generators to respectively supply current to the horizontal solenoid and the vertical solenoid, so that the horizontal solenoid generates a magnetic field that causes the discharge particles to move from the carbon brush to the bottom surface of the friction disk, and the vertical solenoid generates a magnetic field that causes the discharge particles to move toward the opening direction of the discharge particle storage box.

3. The control device for improving discharge particles in a current collection system according to claim 2, characterized in that: The surface of the horizontal solenoid is coated with insulating paint, and the vertical solenoid is arranged in a shielding cover.

4. The control device for improving discharge particles in a current collection system according to claim 2, characterized in that: It also includes a first charge sensor arranged in the friction disk and connected to the PC. When the discharge frequency is greater than the preset frequency, the charge of the discharged particles in the friction disk is collected. The PC calculates the magnetic field strength generated in the horizontal solenoid and the vertical solenoid according to the charge of the discharged particles, and calculates the current passed into the horizontal solenoid and the vertical solenoid according to the magnetic field strength of the horizontal solenoid and the vertical solenoid.

5. The control device for improving discharge particles in a current collection system according to claim 4, characterized in that: The calculation method of the magnetic field intensity and the current in the horizontal solenoid and the vertical solenoid is the same; The PC calculates the magnetic field strength generated by the transverse solenoid according to the charge of the discharged particles, and the method for calculating the current flowing into the transverse solenoid according to the magnetic field strength includes: A1. Determine the number of discharged particles according to the charge of the discharged particles and the charge of a single discharged particle; A2. Determine the total mass of all discharged particles based on the number of discharged particles and the mass of a single particle; A3. According to the charge and total mass of the discharged particles, calculate the force generated by the discharged particles when the carbon brush is energized: F=F 洛 +F 向 +F 空阻 +F 电 +F 重 F 洛 =q(B1v+E) ＊ sin(v,B1), F 电 =Eq,F 重 =mg, Where, F is the force; F 洛 、F 向 and F 重 are the Lorentz force, centripetal force and gravity acting on the discharge particles respectively; F 空阻 and F 电 are the air resistance and electric field force on the discharge particles; q is the charge of the discharge particles; B1 and E are the magnetic field strength and electric field strength generated by the current flowing through the carbon brush; v is the speed of the discharge particles under the action of the magnetic field strength B1; m is the total mass of the discharge particles; C is the air resistance; ρ is the air density; S is the windward volume of the discharge particles; g is the gravitational acceleration; r1 is the radius of the circle formed by all carbon brushes; A4. Calculate the magnetic field strength generated by the transverse solenoid based on the force F of the discharged particles: Where B2 is the magnetic field strength generated by the transverse solenoid; A5. Calculate the current I flowing into the transverse solenoid based on the magnetic field strength B2: Where μ0 is the magnetic permeability in a vacuum; r2 is the distance between the magnetic field generated by the closely wound solenoid assembly and the current generated in the carbon brush.

6. The control device for improving discharge particles in a current collection system according to claim 1 or 2, characterized in that: The discharge particle storage box is placed on the circumference of a circle formed by a plurality of carbon brushes, and two side surfaces thereof pass through a tangent line.

7. The control device for improving discharge particles in a current collection system according to claim 1 or 2, characterized in that: It also includes a second charge sensor arranged in the discharge particle storage box and connected to the PC, which is used to collect the charge of the discharge particles collected in the discharge particle storage box. When the charge of the collected discharge particles is greater than the preset charge, the PC notifies the administrator to clean the discharge particle storage box.

8. The control device for improving discharge particles in a current collection system according to claim 1 or 2, characterized in that: The model of the pressure sensor is Honeywell PX2, the model of the partial discharge detector is Hikvision PPM2000; the model of the first charge sensor is Honeywell's Hall effect sensor.

9. A control method for improving the control device of discharge particles in a current collection system according to any one of claims 2 to 8, characterized in that: Includes steps: S1, receiving the contact pressure uploaded by the pressure sensor. When the contact pressure changes, it indicates that the train has started, and then the current signal generator and multiple partial discharge detectors are turned on; S2, controlling the current signal generator to pass a preset current into the horizontally tightly wound solenoid and the vertically tightly wound solenoid to generate a magnetic field, so that the discharge particles in the friction disk move toward the opening direction of the discharge particle storage box; S3, receiving the discharge frequencies of the discharge particles in the friction disk detected by multiple partial discharge detectors, and selecting the maximum discharge frequency; S4, determine whether the maximum discharge frequency is greater than the preset frequency, if so, proceed to step S5, otherwise return to step S3; S5, controlling the current signal generator to increase the current flowing into the horizontally closely wound solenoid and the vertically closely wound solenoid respectively to enhance the magnetic field, and then returning to step S3 until the maximum discharge frequency is less than or equal to the preset frequency.

10. The control method according to claim 9, characterized in that: When a first charge sensor is provided in the friction disk, the PC calculates the magnetic field strength generated in the horizontal solenoid and the vertical solenoid according to the charge amount of the discharged particles, and calculates the current flowing into the horizontal solenoid and the vertical solenoid according to the magnetic field strength of the horizontal solenoid and the vertical solenoid.

Images