Pantograph-catenary detection calibration test device and pantograph-catenary detection system

Abstract

The invention provides a pantograph-catenary detection calibration test device and a pantograph-catenary detection system, and belongs to the technical field of pantograph tests. The problems that existing testing equipment can only measure static parameters of a pantograph, only vertical vibration of a contact network is simulated in dynamic testing, the working state when a pull-out value exists cannot be considered at the same time, and the testing function is single are solved. The platform comprises an inner frame high-frequency excitation system, a supporting component comprises supporting frame stand columns, the supporting frame stand columns are installed on the two sides of the upper end of the platform, outer frame driving systems are installed on the inner sides of the supporting frame stand columns, a middle frame driving system is installed between the two outer frame driving systems, and the outer frame driving systems drive the middle frame driving system to move in the vertical direction. The high-frequency excitation cylinder is installed on the high-frequency excitation cylinder installation frame, the bottom of the high-frequency excitation cylinder is connected with the installation frame, the guide sleeve is installed below the installation frame, the buffer spring is connected to the outer side of the guide sleeve in a sleeving mode, and the bottom of the guide sleeve is connected with the contact line. The device is mainly used for pantograph catenary detection.

Description

Technical Field

[0001] The invention belongs to the technical field of pantograph testing, and in particular relates to a pantograph-catenary detection and calibration test device and a pantograph-catenary detection system. Background Art

[0002] The pantograph is one of the important components in the electrified railway system. It is a current-collecting device that receives current from the contact wire of the contact network on the electric locomotive. Through its sliding plate in direct contact with the contact wire, the current is introduced from the contact network into the locomotive to provide power for the train and the electrical equipment on the train. Therefore, as an indispensable component of high-speed trains, the structural characteristics of the pantograph directly affect the performance of the high-speed train.

[0003] The pantograph test is a semi-physical simulation test method that uses a test bench to perform ground simulation tests on the pantograph. The basic principle is to fix the pantograph on the test bench and apply a periodic external load through an external exciter to stimulate the pantograph to vibrate. The pantograph vibration response is collected by the sensor, and the dynamic characteristic parameters such as the natural frequency of the pantograph can be obtained.

[0004] However, the existing test equipment can only measure the static parameters of the pantograph, and only simulate the vertical vibration of the contact network in the dynamic test, and fails to take into account the working state when there is a pull-out value at the same time. The test function is single and cannot fully and comprehensively perform the simulated loading of the pantograph during actual operation. Summary of the invention

[0005] In view of this, the present invention aims to propose a pantograph detection calibration test device and a pantograph detection system to solve the problem that the existing test equipment can only measure the static parameters of the pantograph, and only simulate the vertical vibration of the contact network in the dynamic test, but fail to take into account the working state when there is a pull-out value at the same time, and the test function is single.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A bow-net detection and calibration test device comprises an inner frame high-frequency excitation system, an outer frame drive system, a middle frame drive system, a support component and a platform, wherein the support component comprises a support frame column, support frame columns are installed on both sides of the upper end of the platform, the outer frame drive system is installed on the inner side of the support frame column, the middle frame drive system is installed between the two outer frame drive systems, the outer frame drive system drives the middle frame drive system to move in a vertical direction, the inner frame high-frequency excitation system comprises a high-frequency excitation cylinder mounting frame, a mounting frame, a guide sleeve, a buffer spring, a high-frequency excitation cylinder and a contact wire, the high-frequency excitation cylinder is installed on the high-frequency excitation cylinder mounting frame, the bottom of the high-frequency excitation cylinder is connected to the mounting frame, a guide sleeve is installed below the mounting frame, the buffer spring is sleeved on the outside of the guide sleeve, and the bottom of the guide sleeve is connected to the contact wire.

[0008] Furthermore, the middle frame drive system includes two vertical motion mounting frames, two second ball screws, an inner frame sliding block and two horizontal slide rails. The two horizontal slide rails are symmetrically installed between the two vertical motion mounting frames. Two inner frame sliding blocks are installed on the horizontal slide rails. Two second ball screws are symmetrically installed between the two vertical motion mounting frames. Both ends of the second ball screw are connected to the vertical motion mounting frames through second ball screw fixing frames. The high-frequency excitation cylinder mounting frame is installed on the inner frame sliding block. Both ends of the high-frequency excitation cylinder mounting frame are connected to the two second ball screws through screw nuts.

[0009] Furthermore, the outer frame driving system includes a vertical motion guide sleeve, a middle frame mounting frame, a vertical motion guide rail and a first ball screw. The outer ends of the middle frame mounting frame are installed on the vertical motion guide rail through vertical motion guide sleeves. The two vertical motion guide rails are symmetrically installed at the inner ends of the support frame column. The middle part of the support frame column is equipped with a first ball screw fixing frame. The first ball screw is connected to the middle frame mounting frame through a thread. The two vertical motion mounting frames are respectively installed on the two middle frame mounting frames.

[0010] Furthermore, a first force sensor is installed at the connection between the high-frequency excitation cylinder and the mounting frame, a second force sensor is installed on the guide sleeve, and an acceleration sensor is installed on the contact line.

[0011] Furthermore, one end of the second ball screw is connected to the output end of the second drive motor, and the second drive motor is mounted on the vertical motion mounting frame.

[0012] Furthermore, the top of the first ball screw is connected to the output end of the first drive motor, and the first drive motor is installed on the top of the support frame column through the drive motor mounting bracket.

[0013] Furthermore, a mounting base is installed above the platform.

[0014] A bow-net detection system comprises a bow-net detection calibration test device.

[0015] Furthermore, it also includes a host computer, a network switch, a data acquisition computer, a servo control computer, a signal conditioning unit module and a hydraulic pump station. The host computer is responsible for the input of control instructions, the display of control curves, the storage of test data and fault processing. The control instructions are input to the data acquisition computer and the servo control computer through the network switch. The data acquisition computer and the servo control computer condition and amplify the analog and digital quantities through the signal conditioning unit module to form AD, DA, DI, and DO signals. The other end of the AD, DA, DI, and DO signals are connected to the first force sensor, the second force sensor and the acceleration sensor, and the test device is connected to the hydraulic pump station.

[0016] Furthermore, the start and stop control, pressure collection, liquid level collection and unloading of the hydraulic pump station are controlled by PLC, and the operation instructions are exchanged between the host computer and PLC through RS485 communication.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The test device of the present invention is mainly composed of three motion frames: two vertical frames and one horizontal frame, wherein the vertical outer frame is used to simulate the vertical position change of the contact line, and the main movement is low-frequency movement; the horizontal middle frame is used to simulate the pull-out value, that is, the horizontal position change of the contact line; the vertical inner frame is used to simulate the vibration of the contact line, and the main movement is high-frequency movement. The outer frame is fixedly connected to the bottom platform, the middle frame can move up and down on the outer frame, and the inner frame can move horizontally on the middle frame. The bow net is installed between the inner frame and the bottom platform. The experimental device can simulate its static and dynamic operating conditions through the bow net detection system, which solves the problem of incomplete pantograph test calibration, enriches the pantograph test equipment, and enhances the comprehensiveness of the test bench simulation test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of a pantograph-catenary detection and calibration test device according to the present invention;

[0021] Figure 2 It is a structural diagram of the support frame column of the present invention;

[0022] Figure 3 This is a modal analysis diagram of the support frame column of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the outer frame driving system of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the middle frame driving system of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the inner frame high frequency excitation system of the present invention;

[0026] Figure 7 It is a schematic diagram of the pantograph-catenary detection system;

[0027] Figure 8 This is the control algorithm diagram of the bow-net detection system;

[0028] Fig. 9 This is the control effect diagram.

[0029] 1-Inner frame high frequency excitation system, 2-Outer frame drive system, 3-Middle frame drive system, 4-Support component, 5-Platform, 6-Drive motor mounting frame, 7-Support frame column, 8-Mounting base, 9-First drive motor, 10-First ball screw fixing frame, 11-Vertical motion guide sleeve, 12-Middle frame mounting frame, 13-Vertical motion guide rail, 14-First ball screw, 15-Vertical motion mounting frame, 16-Second drive motor, 17-Second ball screw, 18-Screw nut, 19- The second ball screw fixing bracket, 20-inner frame sliding block, 21-horizontal slide rail, 22-high-frequency excitation cylinder mounting bracket, 23-first force sensor, 24-mounting bracket, 25-guide sleeve, 26-buffer spring, 27-contact wire, 28-PLC, 29-acceleration sensor, 30-host computer, 31-network switch, 32-data acquisition computer, 33-servo control computer, 34-signal conditioning unit module, 35-hydraulic pump station, 36-second force sensor, 37-high-frequency excitation cylinder. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0031] See also Figure 1-9The present embodiment is described, a bow net detection calibration test device comprises an inner frame high frequency excitation system 1, an outer frame driving system 2, a middle frame driving system 3, a support component 4 and a platform 5, the support component 4 comprises a support frame column 7, support frame columns 7 are installed on both sides of the upper end of the platform 5, the inner side of the support frame column 7 is installed with the outer frame driving system 2, the middle frame driving system 3 is installed between the two outer frame driving systems 2, the outer frame driving system 2 drives the middle frame driving system 3 to move in the vertical direction, the inner frame high frequency excitation system 1 comprises a high frequency excitation cylinder mounting frame 22, a mounting frame 24, a guide sleeve 25, a buffer spring 26, a high frequency excitation cylinder 37 and a contact wire 27, the high frequency excitation cylinder 37 is installed on the high frequency excitation cylinder mounting frame 22, the bottom of the high frequency excitation cylinder 37 is connected to the mounting frame 24, the guide sleeve 25 is installed below the mounting frame 24, the buffer spring 26 is sleeved on the outside of the guide sleeve 25, and the bottom of the guide sleeve 25 is connected to the contact wire 27.

[0032] The test device is mainly composed of three motion frames: two vertical frames and one horizontal frame, among which the vertical outer frame is used to simulate the vertical position change of the contact line, and the main movement is low-frequency movement; the horizontal middle frame is used to simulate the pull-out value, that is, the horizontal position change of the contact line; the vertical inner frame is used to simulate the vibration of the contact line, and the main movement is high-frequency movement. The outer frame driving system 2 is fixedly connected to the platform 5, the middle frame driving system 3 can move up and down on the outer frame driving system 2, and the inner frame high-frequency excitation system 1 can move horizontally on the middle frame driving system 3. The bow net is installed between the contact line 27 and the bottom platform.

[0033] Furthermore, a bow-net detection system includes a bow-net detection calibration test device, a host computer 30, a network switch 31, a data acquisition computer 32, a servo control computer 33, a signal conditioning unit module 34 and a hydraulic pump station 35. The host computer 30 is responsible for inputting control instructions, displaying control curves, saving test data and handling faults. The control instructions are input to the data acquisition computer 32 and the servo control computer 33 through the network switch 31. The data acquisition computer 32 and the servo control computer 33 condition and amplify analog and digital quantities through the signal conditioning unit module 34 to form AD, DA, DI, and DO signals. The other end of the AD, DA, DI, and DO signals are connected to the first force sensor 23, the second force sensor 36, and the acceleration sensor 29, and the test device is connected to the hydraulic pump station 35.

[0034] like Figure 7As shown, the host computer 30 is mainly responsible for inputting control instructions, displaying control curves, saving test data, and troubleshooting, etc. The control instructions are input to the data acquisition computer 32 and the servo control computer 33 through the network switch 31. The servo control computer 33 is responsible for the servo control of the inner frame high-frequency excitation system 1, the outer frame drive system 2, and the middle frame drive system 3 of the test device to ensure the accuracy of the simulated loading. The data acquisition computer 32 is responsible for collecting the states of the contact line 27 and the like, and uploading them to the host computer 30 to analyze the characteristic curve of the contact line 27. The data acquisition computer 32 and the servo control computer 33 condition and amplify the analog and digital quantities through the signal conditioning unit module 34 to form AD, DA, DI, and DO signals. The other end of this type of signal is connected to various sensors of the test device. In this embodiment, the bandwidth of the high-frequency vibration of the inner frame is relatively high. In order to meet the high-frequency bandwidth requirements, a full-state controller is designed herein, which includes two parts: full-state feedforward and full-state feedback. h , h are the natural frequency and damping ratio of the inner frame system respectively; K af , K vf , K df They are the three parameters in the feedback controller, which are used to improve the damping ratio and natural frequency of the inner frame system; K ar , K vr , K dr They are the three control parameters in the feedforward controller. This controller is designed to cancel the pole link close to the imaginary axis and further improve the bandwidth. Figure 7 Under the system structure, through Figure 8 Under the algorithm control, the contact line control effect diagram of the pantograph-catenary test device is as follows Fig. 9 As shown, the system bandwidth exceeds the required 100Hz, making the designed test device meet the index requirements.

[0035] The middle frame driving system 3 includes two vertical motion mounting frames 15, two second ball screws 17, an inner frame sliding block 20 and two horizontal slide rails 21. The two horizontal slide rails 21 are symmetrically installed between the two vertical motion mounting frames 15. Two inner frame sliding blocks 20 are installed on the horizontal slide rails 21. The two second ball screws 17 are symmetrically installed between the two vertical motion mounting frames 15. Both ends of the second ball screw 17 are connected to the vertical motion mounting frames 15 through the second ball screw fixing frame 19. The high-frequency excitation cylinder mounting frame 22 is installed on the inner frame sliding block 20. Both ends of the high-frequency excitation cylinder mounting frame 22 are connected to the two second ball screws 17 through the screw nut 18 respectively. One end of the second ball screw 17 is connected to the output end of the second drive motor 16. The second drive motor 16 is installed on the vertical motion mounting frame 15.

[0036] The second driving motor 16 drives the movement of the second ball screw 17 via the synchronous belt, so that the rotational movement of the motor is converted into the linear movement of the inner frame sliding block 20, driving the inner frame high-frequency excitation system 1 to achieve left and right horizontal movement.

[0037] The outer frame driving system 2 includes a vertical motion guide sleeve 11, a middle frame mounting frame 12, a vertical motion guide rail 13 and a first ball screw 14. The outer ends of the middle frame mounting frame 12 are installed on the vertical motion guide rail 13 through the vertical motion guide sleeve 11. The two vertical motion guide rails 13 are symmetrically installed at the inner ends of the support frame column 7. The middle part of the support frame column 7 is installed with a first ball screw fixing frame 10. The first ball screw 14 is connected to the middle frame mounting frame 12 through a thread. Two vertical motion mounting frames 15 are respectively installed on the two middle frame mounting frames 12. The top of the first ball screw 14 is connected to the output end of the first drive motor 9. The first drive motor 9 is installed on the top of the support frame column 7 through the drive motor mounting frame 6.

[0038] The first driving motor 9 drives the first ball screw 14 to rotate, so that the middle frame mounting frame 12 drives the middle frame driving system 3 to move in the vertical direction, and the vertical motion guide rail 13 is used for guiding the movement of the middle frame mounting frame 12.

[0039] A first force sensor 23 is installed at the connection between the high-frequency excitation cylinder 37 and the mounting frame 24 , a second force sensor 36 is installed on the guide sleeve 25 , and an acceleration sensor 29 is installed on the contact line 27 .

[0040] The start and stop control, pressure collection, liquid level collection and unloading of the hydraulic pump station 35 are controlled by PLC28, and the operation instructions are exchanged between the host computer 30 and PLC28 through RS485 communication. The power of the test device movement comes from the high-pressure oil provided by the hydraulic pump station, and its low-pressure oil flows back into the hydraulic pump station through pipelines, accumulators, etc. The start and stop control, pressure collection, liquid level collection, unloading and other functions of the hydraulic pump station are controlled by PLC, and the specific operation instructions are exchanged between the host computer and PLC28 through RS485 communication.

[0041] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A pantograph detection and calibration test device, characterized in that: The invention comprises an inner frame high-frequency excitation system (1), an outer frame driving system (2), a middle frame driving system (3), a supporting component (4) and a platform (5), wherein the supporting component (4) comprises a supporting frame column (7), both sides of the upper end of the platform (5) are provided with supporting frame columns (7), the inner sides of the supporting frame columns (7) are provided with an outer frame driving system (2), the middle frame driving system (3) is installed between the two outer frame driving systems (2), the outer frame driving system (2) drives the middle frame driving system (3) to move in a vertical direction, and the inner frame high-frequency excitation system (1) comprises an inner frame high-frequency excitation system (1), an outer frame driving system (2) drives the middle frame driving system (3) to move in a vertical direction, and the inner frame high-frequency excitation system (1) comprises a supporting frame column (7), the inner sides of the supporting frame columns (7) are provided with an outer frame driving system (2), and the inner frame high-frequency excitation system (1) comprises an outer frame driving system (2) drives the middle frame driving system (3) to move in a vertical direction. The excitation system (1) comprises a high-frequency excitation cylinder mounting frame (22), a mounting frame (24), a guide sleeve (25), a buffer spring (26), a high-frequency excitation cylinder (37) and a contact wire (27), wherein the high-frequency excitation cylinder (37) is mounted on the high-frequency excitation cylinder mounting frame (22), the bottom of the high-frequency excitation cylinder (37) is connected to the mounting frame (24), a guide sleeve (25) is mounted below the mounting frame (24), the buffer spring (26) is sleeved on the outside of the guide sleeve (25), and the bottom of the guide sleeve (25) is connected to the contact wire (27).

2. A pantograph detection and calibration test device according to claim 1, characterized in that: The middle frame driving system (3) comprises two vertical motion mounting frames (15), two second ball screws (17), an inner frame sliding block (20) and two horizontal slide rails (21). The two horizontal slide rails (21) are symmetrically mounted between the two vertical motion mounting frames (15). Two inner frame sliding blocks (20) are mounted on the horizontal slide rails (21). Two second ball screws (17) are symmetrically mounted between the two vertical motion mounting frames (15). Both ends of the second ball screws (17) are connected to the vertical motion mounting frames (15) via second ball screw fixing frames (19). The high-frequency excitation cylinder mounting frame (22) is mounted on the inner frame sliding block (20). Both ends of the high-frequency excitation cylinder mounting frame (22) are connected to the two second ball screws (17) via screw nuts (18).

3. A pantograph detection and calibration test device according to claim 2, characterized in that: The outer frame driving system (2) comprises a vertical motion guide sleeve (11), a middle frame mounting frame (12), a vertical motion guide rail (13) and a first ball screw (14); both outer ends of the middle frame mounting frame (12) are mounted on the vertical motion guide rail (13) via the vertical motion guide sleeve (11); the two vertical motion guide rails (13) are symmetrically mounted on the inner ends of the support frame column (7); the middle part of the support frame column (7) is mounted with the first ball screw fixing frame (10); the first ball screw (14) is connected to the middle frame mounting frame (12) via a thread; and the two vertical motion mounting frames (15) are respectively mounted on the two middle frame mounting frames (12).

4. The pantograph-catenary detection and calibration test device according to claim 1, characterized in that: A first force sensor (23) is installed at the connection between the high-frequency excitation cylinder (37) and the mounting frame (24), a second force sensor (36) is installed on the guide sleeve (25), and an acceleration sensor (29) is installed on the contact line (27).

5. The pantograph-catenary detection and calibration test device according to claim 2, characterized in that: One end of the second ball screw (17) is connected to the output end of a second drive motor (16), and the second drive motor (16) is mounted on a vertical motion mounting frame (15).

6. A pantograph-catenary detection and calibration test device according to claim 3, characterized in that: The top of the first ball screw (14) is connected to the output end of the first drive motor (9), and the first drive motor (9) is installed on the top of the support frame column (7) through the drive motor mounting frame (6).

7. The pantograph-catenary detection and calibration test device according to claim 1, characterized in that: A mounting base (8) is mounted above the platform (5).

8. A pantograph-catenary detection system, characterized in that: A bow-net detection and calibration test device comprising the bow-net detection and calibration test device as described in any one of claims 1-8.

9. A pantograph-catenary detection system according to claim 8, characterized in that: The test device also includes a host computer (30), a network switch (31), a data acquisition computer (32), a servo control computer (33), a signal conditioning unit module (34) and a hydraulic pump station (35). The host computer (30) is responsible for inputting control instructions, displaying control curves, storing test data and handling faults. The control instructions are input to the data acquisition computer (32) and the servo control computer (33) through the network switch (31). The data acquisition computer (32) and the servo control computer (33) condition and amplify analog quantities and digital quantities through the signal conditioning unit module (34) to form AD, DA, DI and DO signals. The other ends of the AD, DA, DI and DO signals are connected to the first force sensor (23), the second force sensor (36) and the acceleration sensor (29). The test device is connected to the hydraulic pump station (35).

10. A pantograph-catenary detection system according to claim 8, characterized in that: The start and stop control, pressure collection, liquid level collection and unloading of the hydraulic pump station (35) are controlled by the PLC (28), and the operation instructions are exchanged between the host computer (30) and the PLC (28) through RS485 communication.

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