CN113306577A - Hybrid locomotive system for rail transit - Google Patents
Hybrid locomotive system for rail transit Download PDFInfo
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- CN113306577A CN113306577A CN202110867678.XA CN202110867678A CN113306577A CN 113306577 A CN113306577 A CN 113306577A CN 202110867678 A CN202110867678 A CN 202110867678A CN 113306577 A CN113306577 A CN 113306577A
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- 230000003137 locomotive effect Effects 0.000 title claims abstract description 48
- 238000010248 power generation Methods 0.000 claims abstract description 46
- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 32
- 230000008569 process Effects 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 41
- 239000000919 ceramic Substances 0.000 claims description 17
- 239000000758 substrate Substances 0.000 claims description 14
- 238000007405 data analysis Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 238000013500 data storage Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 7
- 239000000446 fuel Substances 0.000 description 15
- 238000012549 training Methods 0.000 description 14
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 229910019704 Nb2O Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C3/00—Electric locomotives or railcars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L9/00—Electric propulsion with power supply external to the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a hybrid locomotive system for rail transit, which comprises a piezoelectric power generation module, a pantograph power supply module, wheels and a connecting shaft, wherein the piezoelectric power generation module is connected with the pantograph power supply module; the piezoelectric power generation module is arranged on a connecting shaft between the two wheels, voltage generated by the piezoelectric power generation module is stored through the DC/DC converter, and then a direct current power supply from the piezoelectric power generation module and the pantograph power supply module is converted into a frequency-stabilized alternating current power supply through the current inverter, the alternating current power supply drives the traction motor, and the traction motor drives the wheels to rotate; the piezoelectric plate is made to reciprocate to generate charge movement in the vibration process of the elastic shifting plate through the arranged elastic mechanism, direct current is converted into alternating current through the inverter to drive the traction motor, the traction motor drives the wheels to rotate, an energy circulation system is formed, a hybrid power system is formed by matching power supply of the pantograph, and the efficiency of the hybrid power driving system is improved.
Description
Technical Field
The invention belongs to the field of rail transit hybrid locomotives, and particularly relates to a hybrid locomotive system for rail transit.
Background
Along with the development of economy and the continuous growth of urban systems, congestion traffic and urban pollution become difficult problems of hindering the urban development, and because of the special use environment of rail transit, higher requirements on emission and noise are provided, the traditional internal combustion engine can not meet the requirements of rail transit, a novel hybrid locomotive is a big trend, and the development of the current rail transit and the application of new energy are an effective way for solving traffic pressure and environmental pollution; the fuel cell and pantograph mode that adopts in the current track traffic carries out hybrid drive.
At present, most fuel cells are installed on rail transit locomotives and are driven by hybrid power supply, but the power generation efficiency of the fuel cells reaches 40-50%, but the hybrid driving of the fuel cells and pantographs influences the performance, efficiency and economic benefit of a power system of rail transit; and the recovery and disposal of the waste fuel cell also face a difficult problem, so a new hybrid locomotive system is needed to solve the above problems. And current hybrid drive system fault detection is imperfect, because monitoring data is numerous, and equipment is complicated, if adopt traditional instrument to detect and increase work burden to it is lower to detect the accuracy, has certain threat to staff's safety moreover, if the trouble does not in time detect and clear away, will influence the holistic security of locomotive, causes the life threat to passenger and crew member.
Chinese patent application number 201620095961.X discloses a power control system of a hybrid power locomotive, which comprises a generator set voltage sensor, wherein the generator set voltage sensor is arranged at an output end of a generator set and is used for detecting the power supply voltage of the locomotive and transmitting a signal for use; the power grid voltage sensor is arranged on the side of the pantograph or the collector shoe and used for detecting the power grid voltage and transmitting signals for use; and the switching controller is electrically connected to the power grid voltage sensor and the generator set voltage sensor and used for receiving signals of the switching power supply mode and controlling the hybrid power locomotive to switch the power supply mode according to return signals of the power grid voltage sensor and the generator set voltage sensor. The technical scheme adopts an oil-electricity hybrid driving mode, reduces the emission of fuel oil waste gas, but does not fundamentally solve the problem of pollution emission, and still discharges a small amount of waste gas to pollute the air to a certain extent.
Chinese patent application No. 200720078936.1 discloses a track hybrid locomotive containing electric power and other power, which comprises an internal combustion generator set, a traction motor and a rectifying device connected with the internal combustion generator set; a motor controller respectively connected with a rectifying device and a traction motor is arranged between the rectifying device and the traction motor, an electric storage device controller respectively connected with the rectifying device and the motor controller and an electric storage device connected with the electric storage device controller are arranged between the rectifying device and the motor controller, and a power system controller respectively connected with the internal combustion generator set, the motor controller and the electric storage device controller and a driver controller connected with the power system controller are arranged among the internal combustion generator set, the motor controller and the electric storage device controller. The technical scheme adopts the internal combustion generator set and the traction motor to drive, the problem of pollution emission is not fundamentally solved, and a small amount of waste gas is emitted to pollute the air to a certain extent.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a hybrid locomotive system for rail transit, wherein a piezoelectric power generation module is arranged on a connecting shaft of a wheel, when a rotating shaft in the connecting shaft rotates, an elastic shifting sheet is driven to interfere with a lug to generate vibration, and in the vibration process of a plurality of elastic shifting sheets, an elastic mechanism is extruded in a reciprocating mode to generate resonance, and drives the piezoelectric sheets to vibrate, so that the piezoelectric sheets generate voltage difference, and the voltage difference is rectified and converted and then is combined with a pantograph module to drive a traction motor, thereby forming an energy circulation system, completely avoiding the problem of fuel cell pollution, avoiding the problem of waste fuel cell treatment, improving the efficiency of a hybrid locomotive system and reducing energy loss; through setting up detecting system, detect traction motor's operating mode, increase the accuracy that detects, improve detection efficiency, can in time get rid of the potential safety hazard, increase the security of locomotive operation.
The invention provides the following technical scheme:
a hybrid locomotive system for rail transit comprises a piezoelectric power generation module, a pantograph power supply module, wheels and a connecting shaft; the piezoelectric power generation module is arranged on a connecting shaft between the two wheels, voltage generated by the piezoelectric power generation module is stored through the DC/DC converter, and then a direct current power supply from the piezoelectric power generation module and the pantograph power supply module is converted into a frequency-stabilized alternating current power supply through the current inverter, the alternating current power supply drives the traction motor, and the traction motor drives the wheels to rotate;
the piezoelectric power generation module comprises a box body, the box body is of a hollow cylindrical structure, the connecting shaft penetrates through the central position of the box body, the box body is connected with the connecting shaft, and a plurality of convex blocks are uniformly distributed on the circumferential inner side wall of the box body; the inside of even axle is equipped with the pivot, the pivot is evenly connected with a plurality of elasticity plectrums along circumference, and is a plurality of all be equipped with elastic mechanism between the elasticity plectrum, elasticity plectrum and lug mutual interference setting.
Preferably, a plurality of the elastic mechanisms form a circular structure, one side of each elastic mechanism, which is close to the rotating shaft, is connected with a piezoelectric sheet, the other end of each piezoelectric sheet is connected with a collector through the rotating shaft, the collector is arranged inside the rotating shaft, and each elastic mechanism comprises a first elastic assembly and a second elastic assembly.
Preferably, a connecting block is connected between the first elastic assembly and the second elastic assembly, and one side of the connecting block, which is close to the rotating shaft, is connected with the piezoelectric sheet; the first elastic assembly and the second elastic assembly are identical in structure and are arranged in a symmetrical structure by taking the connecting block as a center, the first elastic assembly and the second elastic assembly respectively comprise arc-shaped sleeves, one ends of the house-shaped sleeves are connected with the elastic shifting pieces, arc-shaped guide rods are arranged at the other ends of the arc-shaped sleeves, the arc-shaped guide rods and the arc-shaped sleeves form gap sliding connection, and the other ends of the arc-shaped guide rods are connected with the connecting block.
Preferably, the outer sides of the arc-shaped sleeve and the arc-shaped guide rod are sleeved with springs, one ends of the springs are connected with the elastic shifting piece, and the other ends of the springs are connected with the connecting block; the inside wall of the arc-shaped sleeve is provided with a sliding groove, the arc-shaped guide rod is symmetrically connected with two sliding blocks at one end inside the house type sleeve, and the sliding blocks are in sliding connection with the sliding groove in a relatively matched mode.
Preferably, the piezoelectric patch comprises a substrate, the substrate is a metal plate, and one side of the substrate is provided with a piezoelectric ceramic layer; the upper side and the lower side of the piezoelectric ceramic layer are both connected with wires, the other end of the sub-piezoelectric sheet is connected with the collector, the collector is provided with two wire holes, a rectifier and a DC/DC converter are arranged inside the collector, the two wires of the piezoelectric ceramic layer are respectively connected with the rectifier through the wire holes of the collector, and the rectifier is connected with the DC/DC converter.
Preferably, four groups of elastic shifting pieces are arranged on the rotating shaft, four groups of elastic mechanisms are arranged between the four groups of elastic shifting pieces, four groups of elastic mechanisms are arranged on the four groups of elastic mechanisms, the four elastic pieces are connected with the collector, currents generated by interference of the elastic shifting pieces due to the convex blocks in the rotating process are collected and converted through the DC/DC converter, the currents are combined with the pantograph power supply module to act on the power supply of the traction motor together to drive the wheels to rotate, and an energy circulation system is formed by arranging the piezoelectric power generation module and the wheels, so that the energy is fully utilized.
Preferably, eight groups of elastic shifting pieces are arranged on the rotating shaft, eight groups of elastic mechanisms are arranged between the eight groups of elastic shifting pieces, eight elastic pieces are arranged between the eight groups of elastic shifting pieces, and the eight elastic pieces are connected with the collector, so that current generated by interference of the elastic shifting pieces by the convex blocks in the rotating process is collected and converted by the DC/DC converter and is used for supplying power to the traction motor.
Preferably, a hybrid locomotive system for rail transit employs a traction fault detection system, wherein the detection system comprises: the system comprises a data acquisition module, a data acquisition card, a signal conditioning circuit and an MCU main control board; the MCU main control board acquires signals from the data acquisition card in a serial communication mode, and the data acquisition module acquires data including the temperature of the inverter, the rotating speed of the traction motor and the power supply frequency.
Preferably, the data acquisition module comprises a sensor and a multimeter; the sensor comprises a temperature sensor for acquiring temperature data of the inverter, a rotating speed sensor for acquiring the rotating speed of the traction motor, and a universal meter for acquiring the frequency of the direct-current power supply passing through the inverter.
Preferably, the data acquisition module comprises four modules of data acquisition, data analysis, data display and data storage, and the data acquisition module controls the sensor to complete dynamic data and information acquisition of the temperature of the inverter, the rotating speed of the traction motor and the power supply frequency; the data analysis module processes the acquired dynamic data and information, the data display is performed through a display connected with the MCU main control board, and the processed dynamic data and information are stored in the memory card of the MCU main control board.
Preferably, the piezoelectric ceramic layer comprises one or more of Pb (Mn 1/3) Nb 2/3) O3 and Pb (CO 1/3Nb 2/3) O3, (Na0.5. K0.5. NbO 3) and (Bax. SR 1-x. Nb2O 5).
Preferably, in the specific power generation process of the piezoelectric power generation module, the rotating shaft inside the connecting shaft drives the wheel to rotate, in the rotating process of the rotating shaft, the rotating shaft part inside the box body rotates along with a plurality of elastic shifting pieces uniformly arranged along the circumferential direction, in the rotating process of the elastic shifting pieces, the elastic shifting pieces interfere with the convex blocks arranged on the inner side wall of the box body to cause the elastic shifting pieces to vibrate, when the elastic shifting pieces vibrate, a plurality of elastic mechanisms arranged between the elastic shifting pieces vibrate, the elastic mechanisms are extruded or stretched by the elastic shifting pieces, when the elastic mechanisms are extruded by the elastic shifting pieces, the arc-shaped guide rods slide with the sliding grooves through the arranged sliding blocks, the arc-shaped guide rods slide towards the inside of the arc-shaped sleeve, the arc-shaped guide rods shorten and contract to the inside of the arc-shaped sleeve, at the moment, springs arranged outside the arc-shaped sleeve are extruded and deformed to drive the connecting block to vibrate, in the vibration process of the connecting block, the piezoelectric sheet connected to one side of the connecting block vibrates; when the elastic mechanism is stretched, the motion directions of the arc guide rod and the arc sleeve are opposite to the process, the connecting block drives the piezoelectric plate to vibrate in the opposite directions, therefore, the piezoelectric plate is driven to do reciprocating motion by the arranged elastic mechanism in the vibration process of the elastic shifting piece, when the piezoelectric plate is pressed by vibration, two positive and negative stages can appear on two surfaces of the piezoelectric ceramic layer adhered on the substrate, along with charge movement, positive charges are conveyed to the first rectifier through a lead connected with the piezoelectric plate, negative charges are conveyed to the second rectifier, electric energy is stored through the DC/DC converter and a peripheral circuit, the electric energy of the pantograph is combined after storage, direct current is converted into alternating current through the inverter to drive the traction motor, the traction motor drives the wheels to rotate, an energy circulation system is formed, and the problem of fuel cell pollution is completely avoided, meanwhile, the problem of disposing the waste fuel cell is not worried about, and the efficiency of the hybrid power driving system is improved.
Through the arrangement of the spring, the arc-shaped sleeve and the arc-shaped guide rod, the vibration force borne by the piezoelectric sheet is buffered, the too large amplitude is prevented, the piezoelectric sheet is prevented from colliding with the elastic shifting sheet, the damage of the piezoelectric sheet caused by the too large amplitude or the collision with the elastic shifting sheet is avoided, and the service cycle of the piezoelectric sheet is prolonged; the section of the spring is circular, and the resilience force F of the spring, the pitch t and the length L of the spring meet the following relations: k (L/t); k is an elastic coefficient, and the value range is 15-85%; f unit N/m; D. l is in cm. In order to enable the connection among the first spring assembly, the second spring assembly and the piezoelectric sheet to play a better buffering synergistic effect, the use stability of the piezoelectric sheet is improved, and the problems that the amplitude is too large or too small, the charge generated by the too small amplitude is small and the power generation efficiency is low are prevented; the piezoelectric sheet is subjected to vibration force F1 and radial moment M; the spring resilience force F, the pitch t and the length L satisfy the following relation: m = φ (F1-F) · (L/t)/3 π; phi is a relation coefficient and has a value range of 0.26-3.366.
In addition, a detection method of the traction fault detection system includes: s1, acquiring the temperature of the inverter through a temperature sensor, acquiring the rotating speed of the traction motor through a rotating speed sensor and acquiring the power supply frequency of the inverter through a universal meter when the locomotive runs;
s2, setting the databases as a configuration database and a unit database respectively, wherein each sensor corresponds to one unit database box configuration database, and the configuration database stores relevant configuration information;
s3, analyzing and processing the acquired inverter temperature data, traction motor rotating speed data and power supply frequency data;
s4, comparing the data analyzed by the S3 with the normal original data of the corresponding component, judging whether the operation working condition is safe and stable, and obtaining a diagnosis result;
and S5, after the step S4, displaying the diagnosed fault types through a display of the MCU main control board, displaying the reason and the solution of each fault, and giving corresponding maintenance and repair suggestions according to the fault reasons.
In step S3, the process of performing data processing analysis on the collected data includes the following steps: a, extracting the characteristics of time domain, frequency domain and time-frequency domain of the collected data, selecting 1500 groups of total sample data to disorder the sequence, selecting 1000 groups of samples as a training set, and using the remaining 500 groups of samples as a test set. Randomly selecting a sample from a training set during each training, putting the sample into total sample data, putting the total sample data back into the training set, and repeatedly executing the operation 1000 times to obtain a new sample set; b, repeating the step a to obtain a plurality of new sample sets, and performing classification training on each new sample set by adopting a BDD fault tree classifier to obtain a training result; and c, voting the classification result data by adopting a learner, and taking the result with the largest number of votes of the learner as a final failure result. And after the final fault result is obtained, comparing the final fault result with normal data of the normal inverter temperature, the normal rotating speed of the traction motor and the average frequency of normal power supply, and displaying the obviously abnormal fault data through a display connected with the MCU main control board to obtain the fault result. By adopting the data processing method, the acquired data is classified, trained and processed to obtain the final fault result, the fault detection accuracy is improved, the detection error is reduced, the detection time is saved, the detection efficiency is improved, and the safety of the locomotive in the operation process is further ensured.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention relates to a hybrid locomotive system for rail transit, which is characterized in that a piezoelectric power generation module is arranged on a connecting shaft of a wheel, when a rotating shaft in the connecting shaft rotates, elastic shifting sheets are driven to interfere with a lug to generate vibration, an elastic mechanism is extruded in a reciprocating mode to generate resonance in the vibration process of a plurality of elastic shifting sheets, and the elastic mechanism drives a piezoelectric sheet to vibrate, so that the piezoelectric sheet generates voltage difference and is combined with a pantograph module to drive a traction motor after rectification and conversion, an energy circulation system is formed, the problem of fuel cell pollution is completely avoided, meanwhile, the problem of waste fuel cell treatment is not worried, the efficiency of a hybrid power driving system is improved, and the energy loss is reduced.
(2) According to the hybrid locomotive system for rail transit, the detection system is arranged to detect the working condition of the traction motor, so that the detection accuracy is improved, the detection efficiency is improved, potential safety hazards can be eliminated in time, and the running safety of the locomotive is improved.
(3) According to the hybrid locomotive system for rail transit, the collected data are subjected to feature extraction, and the data subjected to feature extraction are subjected to classification training processing to obtain the final fault result, so that the fault detection accuracy is improved, the detection error is reduced, the detection time is saved, the detection efficiency is improved, and the safety of a locomotive in the operation process is further ensured.
(4) The invention relates to a hybrid power locomotive system for rail transit, which is characterized in that a piezoelectric sheet is enabled to perform reciprocating motion in the vibration process of an elastic shifting sheet through an arranged elastic mechanism, when the piezoelectric sheet is subjected to vibration pressure, two positive and negative stages can appear on two surfaces of a piezoelectric ceramic layer adhered to a substrate, along with charge movement, positive charges are conveyed to a first rectifier through a lead connected with the piezoelectric sheet, negative charges are conveyed to a second rectifier, electric energy is stored through a DC/DC converter and a peripheral circuit, the electric energy is combined with electric energy of a pantograph after being stored, direct current is converted into alternating current through an inverter to drive a traction motor, the traction motor drives wheels to rotate, an energy circulation system is formed, a hybrid power system is formed by matching with power supply of the pantograph, and the economic benefit of the locomotive hybrid system is improved.
(5) According to the hybrid locomotive system for rail transit, the automatic fault detection system of the MCU main control board is arranged, so that the labor force of the traditional manual detection is liberated, the detection efficiency is improved, and the detection side accuracy is improved.
(6) According to the hybrid power locomotive system for rail transit, disclosed by the invention, the relationship between the pitch and the length of the resilience force of the spring is limited, so that the piezoelectric sheet is effectively prevented from being too large in amplitude, the piezoelectric sheet is prevented from colliding with the elastic shifting sheet, the piezoelectric sheet is prevented from being damaged due to too large amplitude or collision with the elastic shifting sheet, and the service life of the piezoelectric sheet is prolonged.
(7) According to the hybrid power locomotive system for rail transit, the relations among the vibration force, the radial moment, the spring resilience force, the pitch and the length of the piezoelectric sheet are limited, so that the connection among the first spring assembly, the second spring assembly and the piezoelectric sheet can play a better buffering synergistic effect, the use stability of the piezoelectric sheet is improved, the low power generation efficiency caused by collision or over-small amplitude caused by over-large amplitude is prevented, and the power generation efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of the wheel structure of the present invention.
Fig. 2 is a schematic view of the internal structure of the cartridge of the present invention.
Fig. 3 is a schematic view of a piezoelectric power generation module of the present invention.
Fig. 4 is a schematic view of the spring mechanism of the present invention.
Fig. 5 is a schematic structural view of a first elastic component of the present invention.
FIG. 6 is a schematic view of the connection of the arcuate bushing and the arcuate guide of the present invention.
Fig. 7 is a schematic view of the collector structure of the present invention.
Fig. 8 is a schematic structural view of a piezoelectric sheet of the present invention.
Fig. 9 is a block diagram of the hybrid locomotive system of the present invention.
FIG. 10 is a block diagram of a traction fault detection system of the present invention.
In the figure: 1. a wheel; 2. a connecting shaft; 3. a piezoelectric power generation module; 4. a wire guide hole; 5. a rectifier; 6. a DC/DC converter; 31. a box body; 32. a rotating shaft; 33. an elastic shifting piece; 34. a collector; 35. a bump; 36. an elastic mechanism; 37. a piezoelectric sheet; 361. a first elastic member; 362. a second elastic member; 363. connecting blocks; 3611. a house type sleeve; 3612. an arc-shaped guide rod; 3613. a spring; 3614. a chute; 3645. a slider; 371. a substrate; 372. and the piezoelectric ceramic layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1-3, a hybrid locomotive system for rail transit comprises a piezoelectric power generation module 3, a pantograph power supply module, wheels 1 and a connecting shaft 2; the piezoelectric power generation module 3 is arranged on a connecting shaft 2 between the two wheels 1, voltage generated by the piezoelectric power generation module 3 is stored through a DC/DC converter 6, and then a direct current power supply from the piezoelectric power generation module 3 and a pantograph power supply module is converted into a frequency-stabilized alternating current power supply through a current inverter, the alternating current power supply drives a traction motor, and the traction motor drives the wheels 1 to rotate;
the connecting shaft 2 is internally provided with a rotating shaft 32, the piezoelectric power generation module 3 is arranged on the connecting shaft 2, the piezoelectric power generation module 3 comprises a box body 31, the box body 31 is of a hollow cylindrical structure, the connecting shaft 2 penetrates through the center of the box body 31, the box body 31 is connected with the connecting shaft 2, and a plurality of convex blocks 35 are uniformly distributed on the circumferential inner side wall of the box body 31; the inside of connecting axle 2 is equipped with pivot 32, pivot 32 is along circumference evenly connected with a plurality of elasticity plectrum 33, and is a plurality of all be equipped with elastic mechanism 36 between the elasticity plectrum 33, elasticity plectrum 33 and lug 35 mutual interference setting.
Four groups of elastic shifting sheets 33 are arranged on the rotating shaft 32, four groups of elastic mechanisms 36 are arranged between the four groups of elastic shifting sheets 33, the four groups of elastic mechanisms 36 are provided with four elastic sheets, the four elastic sheets are connected with the collector 34, current generated by interference of the elastic shifting sheets 33 by the convex blocks 35 in the rotating process is collected and converted by the DC/DC converter 6, the current is combined with the pantograph power supply module to act on the power supply of the traction motor together to drive the wheel 1 to rotate, and an energy circulating system is formed by arranging the piezoelectric power generation module 3 and the wheel 1, so that the energy is fully utilized.
The piezoelectric ceramic layer 372 comprises one or more of PbMn1/3Nb2/3O3, PbCO1/3Nb2/3O3, Na0.5. K0.5. NbO3 and Bax. SR 1-x. Nb2O 5.
Example two:
on the basis of the first embodiment, as shown in fig. 4 to 6, a plurality of the elastic mechanisms 36 form a circular structure, a piezoelectric sheet 37 is connected to each side of the elastic mechanism 36 close to the rotating shaft 32, a collector 34 is connected to the other end of the piezoelectric sheet and penetrates through the rotating shaft 32, the collector 34 is disposed inside the rotating shaft 32, and the elastic mechanism 36 includes a first elastic component 361 and a second elastic component 362; a connecting block 363 is connected between the first elastic component 361 and the second elastic component 362, and one side of the connecting block 363 close to the rotating shaft 32 is connected with the piezoelectric sheet 37; the first elastic component 361 and the second elastic component 362 are identical in structure and are arranged in a symmetrical structure by taking the connecting block 363 as a center, the first elastic component 361 and the second elastic component 362 respectively comprise an arc-shaped sleeve 3611, one end of the house-shaped sleeve is connected with the elastic shifting piece 33, an arc-shaped guide rod 3612 is arranged at the other end of the arc-shaped sleeve 3611, the arc-shaped guide rod 3612 and the arc-shaped sleeve 3611 form clearance sliding connection, and the other end of the arc-shaped guide rod 3612 is connected with the connecting block 363.
A spring 3613 is sleeved on the outer sides of the arc-shaped sleeve 3611 and the arc-shaped guide rod 3612, one end of the spring 3613 is connected with the elastic shifting piece 33, and the other end of the spring 3613 is connected with the connecting block 363; the inner side wall of the arc-shaped sleeve 3611 is provided with a sliding groove 3614, one end of the arc-shaped guide rod 3612, which is arranged inside the house-shaped sleeve, is symmetrically connected with two sliding blocks 3615, and the sliding blocks 3615 are in sliding connection with the sliding groove 3614 in a relatively matched manner.
In the specific power generation process of the piezoelectric power generation module 3, the rotating shaft 32 inside the connecting shaft 2 drives the wheel 1 to rotate, during the rotation process of the rotating shaft 32, the rotating shaft 32 inside the box body 31 rotates along with a plurality of elastic shifting pieces 33 uniformly arranged along the circumferential direction, during the rotation process of the elastic shifting pieces 33, the elastic shifting pieces 33 interfere with bumps 35 arranged on the inner side wall of the box body 31, so that the elastic shifting pieces 33 vibrate, when the elastic shifting pieces 33 vibrate, a plurality of elastic mechanisms 36 arranged between the elastic shifting pieces 33 vibrate, the elastic mechanisms 36 are extruded or stretched and deformed by the elastic shifting pieces 33, when the elastic mechanisms 36 are extruded by the elastic shifting pieces 33, the arc-shaped guide rod 3612 slides mutually with the sliding chute 3614 through the arranged sliding block 3615, the arc-shaped guide rod 3612 slides towards the inside of the arc-shaped sleeve 3611, the arc-shaped guide rod 3612 shortens and contracts to the inside of the arc-shaped sleeve 3611, at this time, a spring 3613 arranged outside the arc-shaped sleeve 3611 is extruded and deformed to drive the connecting block 363 to vibrate, and in the vibration process of the connecting block 363, the piezoelectric sheet 37 connected to one side of the connecting block 363 vibrates; when the elastic mechanism 36 is stretched, the moving directions of the arc guide rod 3612 and the arc sleeve 3611 are opposite to the above process, so that the connecting block 363 drives the piezoelectric plate to vibrate in the opposite direction, therefore, the piezoelectric sheet 37 is driven to reciprocate by the arranged elastic mechanism 36 in the vibrating process of the elastic plectrum 33, when the piezoelectric sheet 37 is subjected to the vibrating pressure, two positive and negative stages appear on two surfaces of the piezoelectric ceramic layer 372 adhered on the substrate 371, along with the charge movement, the positive charge is transmitted to the first rectifier 5 through the lead wire connected with the piezoelectric sheet 37, the negative charge is transmitted to the second rectifier 5, the electric energy is stored through the DC/DC converter 6 and the peripheral circuit, the electric energy of the pantograph is combined after storage, the direct current is converted into the alternating current through the inverter, the traction motor is driven, the traction motor drives the wheel 1 to rotate, and an energy circulation system is formed, the problem of fuel cell pollution is completely avoided, meanwhile, the problem of processing the abandoned fuel cell is not worried about, and the efficiency of the hybrid power driving system is improved.
Through the arrangement of the spring 3613, the arc-shaped sleeve 3611 and the arc-shaped guide rod 3612, the vibration force borne by the piezoelectric sheet 37 is buffered, the overlarge amplitude is prevented, the piezoelectric sheet 37 is prevented from colliding with the elastic plectrum 33, the damage of the piezoelectric sheet 37 due to the overlarge amplitude or the collision with the elastic plectrum 33 is avoided, and the service cycle of the piezoelectric sheet 37 is prolonged; the section of the spring 3613 is circular, and the resilience force F of the spring 3613 and the pitch t and the length L thereof satisfy the following relations: k (L/t); k is an elastic coefficient, and the value range is 15-85%; f unit N/m; D. l is in cm. In order to enable the connection among the first spring 3613 assembly, the second spring 3613 assembly and the piezoelectric sheet 37 to play a better buffering synergistic effect, the stability of the piezoelectric sheet 37 in use is improved, and the situations that the amplitude is too large or too small, the charge generated by the too small amplitude is small and the power generation efficiency is low are prevented; the piezoelectric sheet 37 is subjected to a vibration force F1 and a radial moment M; the resilience force F, the pitch t and the length L of the spring 3613 satisfy the following relation: m = φ · F1-F · L/t/3 π; phi is a relation coefficient and has a value range of 0.26-3.366.
Example three:
as shown in fig. 7-8, in the first embodiment, the piezoelectric sheet 37 includes a substrate 371, the substrate 371 is a metal plate, and a piezoelectric ceramic layer 372 is disposed on one side of the substrate 371; the upper side and the lower side of the piezoelectric ceramic layer 372 are both connected with leads, the other end of the sub-piezoelectric sheet 37 is connected with the collector 34, two lead holes 4 are formed in the collector 34, a rectifier 5 and a DC/DC converter 6 are arranged inside the collector 34, the two leads of the piezoelectric ceramic layer 372 are respectively connected with the rectifier 5 through the lead holes 4 of the collector 34, and the rectifier 5 is connected with the DC/DC converter 6.
Example four
As shown in fig. 9-10, in accordance with a first embodiment, a hybrid locomotive system for rail transit employs a traction fault detection system, wherein the detection system comprises: the system comprises a data acquisition module, a data acquisition card, a signal conditioning circuit and an MCU main control board; the MCU main control board acquires signals from the data acquisition card in a serial communication mode, and the data acquisition module acquires data including the temperature of the inverter, the rotating speed of the traction motor and the power supply frequency.
The data acquisition module comprises a sensor and a universal meter; the sensor comprises a temperature sensor for acquiring temperature data of the inverter, a rotating speed sensor for acquiring the rotating speed of the traction motor, and a universal meter for acquiring the frequency of the direct-current power supply passing through the inverter.
The data acquisition module comprises four modules of data acquisition, data analysis, data display and data storage, and controls the sensor to complete dynamic data and information acquisition of the temperature of the inverter, the rotating speed of the traction motor and the power supply frequency; the data analysis module processes the acquired dynamic data and information, the data display is performed through a display connected with the MCU main control board, and the processed dynamic data and information are stored in the memory card of the MCU main control board.
EXAMPLE five
On the basis of the fourth embodiment, a detection method of the traction fault detection system comprises the following steps: s1, acquiring the temperature of the inverter through a temperature sensor, acquiring the rotating speed of the traction motor through a rotating speed sensor and acquiring the power supply frequency of the inverter through a universal meter when the locomotive runs;
s2, setting the databases as a configuration database and a unit database respectively, wherein each sensor corresponds to one unit database box configuration database, and the configuration database stores relevant configuration information;
s3, analyzing and processing the acquired inverter temperature data, traction motor rotating speed data and power supply frequency data;
s4, comparing the data analyzed by the S3 with the normal original data of the corresponding component, judging whether the operation working condition is safe and stable, and obtaining a diagnosis result;
and S5, after the step S4, displaying the diagnosed fault types through a display of the MCU main control board, displaying the reason and the solution of each fault, and giving corresponding maintenance and repair suggestions according to the fault reasons.
In step S3, the process of performing data processing analysis on the collected data includes the following steps: a, extracting the characteristics of time domain, frequency domain and time-frequency domain of the collected data, selecting 1500 groups of total sample data to disorder the sequence, selecting 1000 groups of samples as a training set, and using the remaining 500 groups of samples as a test set. Randomly selecting a sample from a training set during each training, putting the sample into total sample data, putting the total sample data back into the training set, and repeatedly executing the operation 1000 times to obtain a new sample set; b, repeating the step a to obtain a plurality of new sample sets, and performing classification training on each new sample set by adopting a BDD fault tree classifier to obtain a training result; and c, voting the classification result data by adopting a learner, and taking the result with the largest number of votes of the learner as a final failure result. And after the final fault result is obtained, comparing the final fault result with normal data of the normal inverter temperature, the normal rotating speed of the traction motor and the average frequency of normal power supply, and displaying the obviously abnormal fault data through a display connected with the MCU main control board to obtain the fault result. By adopting the data processing method, the acquired data is classified, trained and processed to obtain the final fault result, the fault detection accuracy is improved, the detection error is reduced, the detection time is saved, the detection efficiency is improved, and the safety of the locomotive in the operation process is further ensured.
EXAMPLE six
A hybrid locomotive system for rail transit comprises a piezoelectric power generation module 3, a pantograph power supply module, wheels 1 and a connecting shaft 2; the piezoelectric power generation module 3 is arranged on a connecting shaft 2 between the two wheels 1, voltage generated by the piezoelectric power generation module 3 is stored through a DC/DC converter 6, and then a direct current power supply from the piezoelectric power generation module 3 and a pantograph power supply module is converted into a frequency-stabilized alternating current power supply through a current inverter, the alternating current power supply drives a traction motor, and the traction motor drives the wheels 1 to rotate;
the connecting shaft 2 is internally provided with a rotating shaft 32, the piezoelectric power generation module 3 is arranged on the connecting shaft 2, the piezoelectric power generation module 3 comprises a box body 31, the box body 31 is of a hollow cylindrical structure, the connecting shaft 2 penetrates through the center of the box body 31, the box body 31 is connected with the connecting shaft 2, and a plurality of convex blocks 35 are uniformly distributed on the circumferential inner side wall of the box body 31; the inside of connecting axle 2 is equipped with pivot 32, pivot 32 is along circumference evenly connected with a plurality of elasticity plectrum 33, and is a plurality of all be equipped with elastic mechanism 36 between the elasticity plectrum 33, elasticity plectrum 33 and lug 35 mutual interference setting.
Eight groups of elastic shifting pieces 33 are arranged on the rotating shaft 32, eight groups of elastic mechanisms 36 are arranged between the eight groups of elastic shifting pieces 33, eight elastic pieces are arranged on the eight groups of elastic mechanisms 36, the eight elastic pieces are connected with the collector 34, the current generated by the interference of the convex blocks 35 on the elastic shifting pieces 33 in the rotating process is collected and converted through the DC/DC converter 6, the current is combined with the pantograph power supply module to act on the power supply of the traction motor together to drive the wheel 1 to rotate, and an energy circulating system is formed by arranging the piezoelectric power generation module 3 and the wheel 1, so that the energy is fully utilized.
The piezoelectric ceramic layer 372 comprises one or more of PbMn1/3Nb2/3O3, PbCO1/3Nb2/3O3, Na0.5. K0.5. NbO3 and Bax. SR 1-x. Nb2O 5.
The device obtained by the technical scheme is a hybrid locomotive system for rail transit, a piezoelectric power generation module is arranged on a connecting shaft of a wheel, when a rotating shaft inside the connecting shaft rotates, the elastic shifting sheets are driven to interfere with a lug to generate vibration, in the vibration process of the elastic shifting sheets, the elastic mechanism is extruded in a reciprocating mode to generate resonance, and drives the piezoelectric sheets to vibrate, so that the piezoelectric sheets generate voltage difference and are combined with a pantograph module to drive a traction motor after rectification and conversion, an energy circulation system is formed, the problem of fuel cell pollution is completely avoided, meanwhile, the problem of waste fuel cell treatment is not worried, the efficiency of a hybrid power driving system is improved, and the energy loss is reduced. Through setting up detecting system, detect traction motor's operating mode, increase the accuracy that detects, improve detection efficiency, can in time get rid of the potential safety hazard, increase the security of locomotive operation. Through carrying out the feature extraction to the data of gathering to carry out categorised training to the data after the feature extraction and handle, obtain final fault result, promote fault detection's accuracy, reduce detection error, save check-out time, improve detection efficiency, further guarantee the security of locomotive in operation process. The elastic mechanism is arranged in the vibrating process of the elastic shifting piece, so that the piezoelectric piece moves in a reciprocating mode, when the piezoelectric piece is under vibrating pressure, positive and negative two stages can appear on two surfaces of a piezoelectric ceramic layer adhered to the substrate, the piezoelectric ceramic layer moves along with electric charges, positive charges are conveyed to the first rectifier through a lead connected with the piezoelectric piece, negative charges are conveyed to the second rectifier, electric energy is stored through the DC/DC converter and a peripheral circuit, the electric energy of the pantograph is combined after being stored, direct current is converted into alternating current through the inverter, the traction motor is driven, the traction motor drives wheels to rotate, an energy circulation system is formed, a hybrid power system is formed by matching with power supply of the pantograph, and the economic benefit of the locomotive hybrid system is improved. Through the automatic fault detection system of the MCU main control board, the labor force of manual detection in the past is liberated, the detection efficiency is improved, and the detection side accuracy is improved. Through the relation between its pitch of the resilience force of injecing the spring, length, prevent effectively that the piezoelectric patches from preventing the amplitude too big, prevent that piezoelectric patches and elasticity plectrum from bumping, avoided the piezoelectric patches because the amplitude is too big or collide with the elasticity plectrum and cause the damage, the life cycle of extension piezoelectric patches. Receive vibrating force, radial moment through injecing the piezoelectric patches, the relation between spring resilience force, pitch, the length makes the connection between first spring assembly, second spring assembly and the piezoelectric patches connect and plays better buffering synergism, promotes the stability of piezoelectric patches's use, prevents that the too big collision that arouses of amplitude or the generating efficiency that the amplitude undersize arouses low, promotes the generating efficiency.
Other technical solutions not described in detail in the present invention are prior art in the field, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A hybrid locomotive system for rail transit comprises a piezoelectric power generation module (3), a pantograph power supply module, wheels (1) and a connecting shaft (2); the power supply device is characterized in that the piezoelectric power generation module (3) is arranged on a connecting shaft (2) between two wheels (1), voltage generated by the piezoelectric power generation module (3) is stored through a DC/DC converter (6), then a direct current power supply from the piezoelectric power generation module (3) and a pantograph power supply module is converted into a frequency-stabilized alternating current power supply through a current inverter, the alternating current power supply drives a traction motor, and the traction motor drives the wheels (1) to rotate;
a rotating shaft (32) is arranged inside the connecting shaft (2), the piezoelectric power generation module (3) is arranged on the connecting shaft (2), the piezoelectric power generation module (3) comprises a box body (31), the box body (31) is of a hollow cylindrical structure, the connecting shaft (2) penetrates through the center of the box body (31), the box body (31) is connected with the connecting shaft (2), and a plurality of convex blocks (35) are uniformly distributed on the circumferential inner side wall of the box body (31); the inside of even axle (2) is equipped with pivot (32), pivot (32) are evenly connected with a plurality of elasticity plectrum (33) along circumference, and are a plurality of all be equipped with elastic mechanism (36) between elasticity plectrum (33), elasticity plectrum (33) and lug (35) mutual interference setting.
2. Hybrid locomotive system for rail transit according to claim 1, characterized in that a plurality of said elastic means (36) form a circular structure, said elastic means (36) are connected with a piezoelectric plate (37) on one side close to the rotation axis (32), and said piezoelectric plate is connected with a collector (34) on the other side through the rotation axis (32), said collector (34) is arranged inside the rotation axis (32), said elastic means (36) comprises a first elastic component (361) and a second elastic component (362).
3. Hybrid locomotive system for rail transit according to claim 2, characterized in that a connection block (363) is provided between said first elastic component (361) and said second elastic component (362), said connection block (363) being connected to said piezoelectric plate (37) on the side close to said rotation axis (32); first elastic component (361) and second elastic component (362) structure are the same, and use connecting block (363) to be symmetrical structure setting as the center, first elastic component (361) and second elastic component (362) all include arc sleeve pipe (3611), house type sheathed tube one end is connected with elasticity plectrum (33), and the other end of arc sleeve pipe (3611) is equipped with arc guide arm (3612), arc guide arm (3612) constitutes clearance sliding connection with arc sleeve pipe (3611), the other end and connecting block (363) of arc guide arm (3612) are connected.
4. Hybrid power locomotive system for rail transit according to claim 3, characterized in that the outside of said arc-shaped sleeve (3611) and arc-shaped guide rod (3612) is sleeved with a spring (3613), one end of said spring (3613) is connected with an elastic pick (33), the other end of said spring (3613) is connected with said connecting block (363); the inner side wall of the arc-shaped sleeve (3611) is provided with a sliding groove (3614), one end of the arc-shaped guide rod (3612) arranged inside the house-type sleeve is symmetrically connected with two sliding blocks (3615), and the sliding blocks (3615) are in relative matching sliding connection with the sliding groove (3614).
5. Hybrid locomotive system for rail transit according to claim 2, characterized in that said piezoelectric patch (37) comprises a substrate (371), substrate (371) being a metal plate, one side of substrate (371) being provided with a piezoceramic layer (372); the upper side and the lower side of the piezoelectric ceramic layer (372) are both connected with wires, the other end of the piezoelectric sheet (37) is connected with the collector (34), two wire holes (4) are formed in the collector (34), a rectifier (5) and a DC/DC converter (6) are arranged in the collector (34), the two wires of the piezoelectric ceramic layer (372) are connected with the rectifier (5) through the wire holes (4) of the collector (34), and the rectifier (5) is connected with the DC/DC converter (6).
6. The hybrid power locomotive system for rail transit according to claim 1, wherein four sets of elastic shifting pieces (33) are arranged on the rotating shaft (32), four sets of elastic mechanisms (36) are arranged between the four sets of elastic shifting pieces (33), four sets of elastic mechanisms (36) are arranged on the four sets of elastic mechanisms (36), the four elastic pieces are connected with the collector (34), the current generated by the interference of the convex blocks (35) on the elastic shifting pieces (33) in the rotating process is collected and converted through the DC/DC converter (6), and the current is combined with the pantograph power supply module to jointly act on the power supply of the traction motor to drive the wheel (1) to rotate, and an energy circulation system is formed by arranging the piezoelectric power generation module (3) and the wheel (1), so that the energy is fully utilized.
7. Hybrid locomotive system for rail transit according to claim 1, characterized in that eight sets of elastic shifting blades (33) are provided on said rotating shaft (32), eight sets of elastic mechanisms (36) are provided between eight sets of elastic shifting blades (33), eight sets of elastic mechanisms (36) are provided with eight elastic blades, eight elastic blades are connected with collector (34), current generated by interference of projection (35) on elastic shifting blade (33) during rotation is collected and converted by DC/DC converter (6) for power supply of traction motor.
8. A hybrid locomotive system for rail transit according to any of claims 1-7 employing a traction fault detection system, characterized in that the detection system comprises: the system comprises a data acquisition module, a data acquisition card, a signal conditioning circuit and an MCU main control board; the MCU main control board acquires signals from the data acquisition card in a serial communication mode, and the data acquisition module acquires data including the temperature of the inverter, the rotating speed of the traction motor and the power supply frequency.
9. The traction fault detection system of claim 8, wherein the data acquisition module comprises a sensor, a multimeter; the sensor comprises a temperature sensor for acquiring temperature data of the inverter, a rotating speed sensor for acquiring the rotating speed of the traction motor, and a universal meter for acquiring the frequency of the direct-current power supply passing through the inverter.
10. The system for detecting the traction fault is characterized in that the data acquisition module comprises four modules of data acquisition, data analysis, data display and data storage, and the data acquisition module controls the sensor to acquire dynamic data and information of the temperature of the inverter, the rotating speed of the traction motor and the power supply frequency; the data analysis module processes the acquired dynamic data and information, the data display is performed through a display connected with the MCU main control board, and the processed dynamic data and information are stored in the memory card of the MCU main control board.
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