CN115248127A - Integrated rail vehicle walking part test system - Google Patents
Integrated rail vehicle walking part test system Download PDFInfo
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- CN115248127A CN115248127A CN202210829987.2A CN202210829987A CN115248127A CN 115248127 A CN115248127 A CN 115248127A CN 202210829987 A CN202210829987 A CN 202210829987A CN 115248127 A CN115248127 A CN 115248127A
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Abstract
The invention relates to an integrated rail vehicle running part test system, which comprises: the wheel set simulation subsystem comprises: the device is used for simulating axial and radial loads between train wheel tracks; the traction motor bearing simulation subsystem: the device is used for simulating the actual rotating speed of a train traction motor bearing and applying a radial load to a test bearing to simulate the fault of the train traction motor bearing; an auxiliary subsystem: the hydraulic control device is used for controlling the transmission load, the rotating speed of the servo motor and the operation of the hydraulic control device; the data acquisition subsystem: the method is used for realizing the acquisition of analog data. Compared with the prior art, the invention can simulate the running condition of a real train, and has the advantages of good experimental repeatability, low cost, high reliability, capability of providing an experimental platform for a vehicle-mounted sensor and the like.
Description
Technical Field
The invention relates to the field of rail vehicle simulation experiments, in particular to an integrated rail vehicle running part test system.
Background
The line test research and verification are needed to be carried out on a newly built railway locomotive of the railway, and the overhaul locomotive needs to be delivered and trial run, which all need to occupy the formal railway line, thereby causing the contradiction that the operation check of the locomotive line is in conflict with the resource of transportation production, and the line has large operation investment, long time consumption and many uncertain factors, and part of the test can not be realized through the line (for example, the line which is not suitable for the track gauge of the locomotive at the exit, the line which is not suitable for the highest test speed of the locomotive design and the like). Meanwhile, with the batch introduction and application of high-power alternating-current transmission locomotives and the reaching of the maintenance life, each maintenance base and each maintenance factory face the problems of locomotive performance test after maintenance and factory inspection. In addition, the locomotives in various main engine factories are further localized, and the novel locomotives also need to be subjected to performance tests.
The above requirements all promote the exploration of replacing the line test of the whole train test bed, at present, research can be divided into a train actual line operation test and a laboratory model test, and the train actual line operation test generally widely adopts the laboratory model test due to the defects of high test cost, long test period, many limiting factors and the like, but most of the laboratory tests are limited to independent tests of subsystems with a single component as an object, and only relevant excitation is loaded on the corresponding object, so that the coupling and transmission modes among the systems under the real train operation environment are rarely considered. The tests are carried out on a transmission path without coupling, wireless circuit excitation and under a train, although the dynamic interaction mechanisms of a rolling bearing, a motor bearing and the like can be well explained, the real running state from a wheel set to a motor to a running part in the actual running of a more complex train cannot be completely reflected, and the difficulty is provided for the real fault research and diagnosis of the parts.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an integrated rail vehicle running gear test system which is used for simulating the running state of a rail vehicle running gear under a complex working condition, reducing the online test cost and providing an experiment platform for vehicle-mounted sensor equipment.
The purpose of the invention can be realized by the following technical scheme:
an integrated rail vehicle running gear testing system, the system comprising:
the wheel set simulation subsystem comprises: the device is used for simulating axial and radial loads between train wheel tracks;
a traction motor bearing simulation subsystem: the device is used for simulating the actual rotating speed of a train traction motor bearing and applying a radial load to a test bearing to simulate the fault of the train traction motor bearing;
an auxiliary subsystem: the hydraulic control device is used for controlling the transmission load, the rotating speed of the servo motor and the operation of the hydraulic control device;
the data acquisition subsystem: the method is used for realizing acquisition of analog data.
Wheel pair simulation subsystem include by the mutual extrusion contact of outline and the wheel pair that removable rail wheel and test wheel constitute, for the wheel pair back shaft of drive wheel pairing, through the wheel pair axle box at bearing fixed wheel pair back shaft both ends and the wheel pair supporting seat of fixed wheel pair axle box, wheel pair supporting seat bottom through axial or radial slide rail fixed mounting walk on the experimental plane of portion to realize the loading of axial and radial load through the actuator.
Wheel pair supporting seat that the rail wheel corresponds realize loading axial load through axial actuator, wheel pair supporting seat that the test wheel corresponds realize loading radial load through radial actuator.
The traction motor bearing simulation subsystem comprises a traction motor, a rotating shaft, a gear box and a flange joint which are sequentially driven, wherein the flange joint is in transmission connection with the test wheel, and wheel pair resistance is introduced through the flange joint, so that simulation of various states of the train traction motor bearing under actual working conditions is realized.
The traction motor bearing simulation subsystem further comprises an external platform supporting device fixedly installed on the test wheel corresponding to the wheel pair supporting seat, a supporting bearing seat D, a supporting bearing seat B, a test bearing radial loading device A and a supporting bearing seat A which are sequentially arranged along the axial direction of the rotating shaft and fixedly installed on the external platform supporting device, wherein the supporting bearing seat D is provided with a test bearing which is rotatably connected with the rotating shaft.
The auxiliary subsystem include servo motor, pivot and universal joint and industrial computer and the hydraulic control device that the transmission is connected in proper order, the universal joint be connected with the rail wheel transmission, the industrial computer pass through converter control servo motor's rotation rate, move with the drive actuator through electric cabinet control hydraulic control device.
The hydraulic control device comprises an oil tank, an oil pump motor, an oil cooler, an air tank seat overflow valve and an electromagnetic valve, wherein the oil tank is connected with the oil pump motor through an oil pipe and a butterfly valve, the oil tank extends out or retracts through a piston rod of the air tank seat overflow valve and the electromagnetic valve control actuator, and the oil cooler is used for cooling oil temperature.
The data acquisition subsystem include respectively with the industrial computer be connected:
the device comprises a vibration acceleration sensor, a displacement sensor, a force sensor, a reluctance rotating speed sensor, a triaxial acceleration sensor and a torsion sensor, wherein the vibration acceleration sensor is arranged on a wheel set axle box corresponding to a test wheel and used for collecting vibration acceleration signals of a wheel set, the displacement sensor is arranged on a supporting bearing seat B and used for detecting whether a rotating shaft is eccentric, the force sensor is arranged on a radial loading device B of the test bearing and used for measuring radial load applied to the rotating shaft, the reluctance rotating speed sensor is arranged on a supporting bearing seat A and used for detecting rotating speed of the rotating shaft, the triaxial acceleration sensor is arranged on a supporting bearing seat C and used for collecting vibration acceleration signals of the test bearing, and the torsion sensor is arranged on the rotating shaft through a coupler B and used for collecting transmission load.
The transmission and excitation signals of the traction motor bearing simulation subsystem comprise:
(1) Bearing vibration signal x d The transmission path of the system is divided into a rail wheel, a test wheel, a gear box and a traction motor, and the signal expression is as follows:
x d ＝h b *e b +h e *e n +h d *d n
wherein h is b *e b For the vibration response of the bogie, h e *e n For random noise interference, h d *d n The motor fault impact is realized;
(2) Vibration response h of bogie b *e b Wheel pair, axle box and primary suspensionThe two-level suspension path is related to the following:
h b *e b ＝h a *e a +h s1 *e s1 +h s2 *e s2 +h g *u g +h w *u w +h r *u r
wherein h is a *e a For axle box vibration signals, h s1 *e s1 、h s2 *e s2 Are respectively primary and secondary suspension vibration excitation h g *u g For vibration excitation of gearboxes, h w *u w For vibration excitation of wheel sets, h r *u r Vibration disturbance of the steel rail;
wheel set vibration excitation in a transmission path simulates tread damage and wheel set abrasion by replacing wheel sets and changing excitation signal forms, and meanwhile, the running working condition of a gear box of a real train in running is simulated by radial and vertical excitation loading, so that the acquired traction motor signal is closer to the running of the real train, and the running condition of real vehicle components under the fault condition is restored;
(3) Wheel set bearing test signal x n The transmission path of (a) and the signal component transmitted to the bearing are expressed as:
x n ＝h n *u n +h e *e n +h d *d n
wherein x is n For measuring the signal, h n *u n For dynamic response of the system, h e *e n For random noise interference, h d *d n Is the bearing fault impact.
The system realizes the whole train simulation under different real train working conditions according to different simulated working conditions, fault types and transmission excitation, and specifically comprises the following steps:
wheel set simulation test: the corresponding working condition types comprise rail irregularity, wheel set tread loss/stripping and rail fastener loosening, excitation signals are generated by the test wheel and the rail wheel, and the test method comprises the steps of replacing the test wheel and the rail wheel with tread faults and changing applied load;
for the neutral test: the corresponding working condition types comprise that a coupler is not centered, a universal joint is not centered and a rotor is not centered, excitation signals are respectively generated by the coupler, the universal joint and the rotor, the testing method is to manually adjust the non-centering performance of the coupler, and the eccentricity is collected through a displacement sensor;
traction motor bearing simulation test: the corresponding working conditions comprise rotor fault, stator fault, traction motor bearing fault and gear mismatching of a gear box, an excitation signal is generated by a traction motor bearing simulation subsystem, and the test method comprises the steps of replacing a fault rotor, replacing a fault stator, replacing a fault bearing and replacing a gear with unmatched size.
Compared with the prior art, the invention has the following advantages:
1. the invention provides an integrated train running part test system which has good repeatability and strong anti-interference capability, can simulate running tests of real trains, and can also perform tests which cannot be completed on lines, including running states under various extreme working conditions.
2. The system can complete the combined test of various waveforms, simulate the complex working conditions of a real train in operation, restore the operation states of multiple couplings and multiple transmission paths among all parts of the real train through the transmission device, and realize the related test of the real train running part, thereby reducing the test cost and improving the test safety.
3. The system can be used for verification and examination tests of devices such as related vehicle-mounted sensors and the like in subsequent development, so that the test cost and the safety risk of loading the devices in real line examination are reduced, and an experiment platform can be provided for digital perception of rail vehicles.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a diagram of a wheel set simulation subsystem of the present invention.
FIG. 3 is a diagram of a traction motor bearing simulation subsystem architecture of the present invention.
Fig. 4 is a diagram of an auxiliary subsystem architecture of the present invention.
FIG. 5 is a flow chart of the operation of the present invention.
Fig. 6 is a model of a signal transmission path of a running gear of a rail vehicle.
The notation in the figure is:
1. a running gear test plane 101, a rail wheel 102, a test wheel 103, an axial actuator 104, a radial actuator 105, a vibration acceleration sensor 8, a wheel-set axle box 9, a wheel-set supporting seat 10, a wheel-set supporting shaft 11, a bearing 12, a flange joint 13, a shaft coupling A, a shaft coupling 14, a gear box 15, a shaft coupling C, a shaft coupling 16, a supporting bearing seat A, a supporting bearing seat 17, a test bearing radial loading device A, a test bearing radial loading device B, a test bearing radial loading device 19, a supporting bearing seat B, a supporting bearing seat D, a testing bearing seat D, a 201, an external platform supporting device 202, a force sensor 203 and a magnetic resistance rotating speed sensor, 204, a displacement sensor, 205, a triaxial acceleration sensor, 21, a coupler D,22, a traction motor, 23, a hand wheel, 24, a rotating shaft, 25, a torque sensor, 26, a universal joint, 27, an industrial personal computer, 28, a frequency converter, 29, a coupler B,30, a rotating shaft, 31, an air tank, 32, an air tank seat overflow valve, 33, a test bearing, 34, an electromagnetic valve, 35, an auxiliary subsystem cabinet, 36, a supporting bearing seat C,37, a piston rod, 301, an oil tank, 302, an oil pump motor, 303, an oil cooler, 304, an electric cabinet, 305, a butterfly valve, 306, a servo motor, 307, a motor seat, 308, an oil pipe, 7 and a platform protective cover.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
As shown in fig. 1, the invention provides an integrated train running gear test system, which is used for simulating the running state of a running gear of a railway vehicle under complex working conditions, can reduce the online experiment cost, and provides an experiment platform for various types of vehicle-mounted sensor equipment.
As shown in fig. 2, the wheel-set simulation subsystem includes: the device comprises a walking part test plane 1, a wheel pair supporting shaft 10, a wheel pair supporting seat 9, a wheel pair axle box 8, a bearing 11, an axial actuator 103, a radial actuator 104 and a vibration acceleration sensor 105, wherein the wheel pair comprises a replaceable test wheel 101 and a rail wheel 102 which are installed on the wheel pair supporting shaft 10, the outer contours of the test wheel 101 and the rail wheel 102 are in extrusion contact with each other, the wheel pair supporting shaft 10 is installed on the wheel pair axle box 8, the wheel pair axle box 8 is installed on the wheel pair supporting seat 9, and the wheel pair supporting seat 9 is installed on the walking part test plane 1 through a sliding rail. The piston rods 37 of the axial actuator 103 and the radial actuator 104 extend or retract to push the test wheels 101 and the rail wheels 102 on the wheel pair supporting seats 9 with the bottom provided with the sliding rails to squeeze each other, so that the simulation of the axial and radial loads between the wheel rails of the train is realized. Meanwhile, a torsion sensor 25 of the auxiliary subsystem is used for accurately measuring the magnitude of applied torque, and a vibration acceleration sensor 105 mounted on the wheel set axle box 8 acquires a vibration acceleration signal of the wheel set.
As shown in fig. 3, the traction motor bearing simulation subsystem mainly includes: the device comprises a detachable flange joint 12, a coupler A13, a gear box 14, a coupler C15, a supporting bearing seat 16, a rotating shaft 24, a testing bearing 33, a testing bearing radial loading device A17, a testing bearing radial loading device B18, a supporting bearing seat B19, a coupler D21, a traction motor 22, an external platform supporting device 201, a force sensor 202, a reluctance rotating speed sensor 203, a displacement sensor 204 and a triaxial acceleration sensor 205. The test bearing 33 comprises a replaceable stripping type inner ring, an outer ring, a retainer and rollers, wherein the inner ring, the outer ring and the retainer of the bearing have different fault grades, so that the fault of the bearing of the traction motor of the train is simulated. The flange joint 12, the coupler A13 and the coupler C15 are mainly used for transmitting torque generated by a servo motor 306, the gear box 14 is used for increasing bearing rotating speed to achieve the purpose of simulating the actual rotating speed condition of a train traction motor bearing, the test bearing radial loading device A17 and the test bearing radial loading device B18 are designed according to the positions of a traction motor driving end and a traction motor non-driving end, a proper load on the rotating shaft 24 is applied through the force sensor 202, the rotating shaft 24 presses down the test bearing 33, and therefore the application of the radial load on the test bearing 33 is completed.
External platform strutting arrangement 201 passes through bolt and welded fastening and connects on the test wheel pair supporting seat 9 of wheel pair simulation subsystem, mainly play the effect of supporting traction motor bearing simulation subsystem, reluctance revolution speed sensor 203 is through the extension device fixed mounting who supports bearing frame A16, but real-time supervision rotational speed, install displacement sensor 204 on supporting bearing frame B19 and be used for detecting whether eccentric pivot 24 is, prevent that pivot 24 from locking, triaxial acceleration sensor 205 installs on supporting bearing frame C36, be used for gathering the vibration acceleration signal of test bearing 33, and simultaneously, can also introduce the wheel pair resistance through flange joint 12, realize the simulation of each type state under the train traction motor bearing actual operating mode.
As shown in fig. 4, the auxiliary subsystem mainly includes: the device comprises a servo motor 306, an oil pump motor 302, a motor base 307, a rotating shaft 30, a universal joint 26, a coupling B29, a torsion sensor 25, an air tank 31, an air tank base overflow valve 32, an electromagnetic valve 34, an oil tank 301, an oil cooler 303, an electric cabinet 304, an industrial personal computer 27, a frequency converter 28 and a platform protective cover 7. The industrial personal computer 27 controls the transmission load through the torque sensor 25, controls the rotation speed of the servo motor 306 through the frequency converter 28, and controls the operation of the hydraulic control device through the electric cabinet 304, and the oil pump motor 302, the gas tank 31, the gas tank seat overflow valve 32 and the electromagnetic valve 34 form the hydraulic control device to drive the piston rod 37 of the radial actuator 104 to extend or retract so as to enable the wheel pair supporting seat 9 to slide on the sliding rail. The servo motor 306 is installed on a motor base 307, is in driving connection with the rotating shaft 30, the coupler B29, the torsion sensor 25 and the universal joint 26, provides rotating power for the wheel set simulation subsystem, the universal joint 26 mainly transmits variable-angle torque and compensates fit errors among shafts, the oil tank 301 is connected with the oil pump motor 302 through an oil pipe 308 and a butterfly valve 305, the oil pump motor 302 provides pressure for a liquid device, and oil temperature is cooled through the oil cooler 303.
As shown in fig. 5, the specific operation method of the test system is as follows:
the first step is as follows: starting an industrial personal computer, and starting a motor in a low-voltage state to protect equipment safety;
the third step: after the motor is started, acquiring a position value of the servo actuator, namely whether a current control set value is consistent with an actual value or not, and if the difference is large, manually inputting the current value;
and fourthly, starting a loading system, and setting parameters including control mode, waveform, median, amplitude, frequency and rotating speed.
The fifth step: and switching high voltage and operating the system.
And a sixth step: starting a test, monitoring the force/torque value in real time for ensuring the safety of the test, and if the force/torque value exceeds a rated value, emergently stopping the device;
the seventh step: the experiment is completed, the stored data is collected, the low voltage is switched and the motor and the related control box are closed.
The eighth step: and generating an experiment report and closing the system.
As shown in fig. 6, the transmission and excitation signals of the traction motor bearing simulation subsystem can be classified into the following categories:
1) Bearing vibration signal x d The transmission path can be divided into rail wheel, testing wheel pair, gear box and motor. The signal can be expressed as the following equation:
x d ＝h b *e b +h e *e n +h d *d n
wherein h is b *e b For the vibration response of the bogie, h e *e n For random noise interference, h d *d n Is the motor fault impact.
2) Vibration response signal h on bogie b The wheel set, the axle box, the primary suspension and the secondary suspension transfer path.
h b *e b ＝h a *e a +h s1 *e s1 +h s2 *e s2 +h g *u g +h w *u w +h r *u r
Wherein h is a *e a For axle box vibration signals, h s1 *e s1 +h s2 *e s2 Vibration excitation of primary and secondary suspension, h g *u g Vibration excitation of the gearbox h w *u w For vibration excitation of wheel sets, h r *u r It is a vibration disturbance of the steel rail.
Wheel set vibration excitation in the transmission path can simulate tread damage and wheel set abrasion by replacing wheel sets and changing excitation signal forms. Meanwhile, the invention can simulate the operation condition of the gear box of a real train in operation by using the radial and vertical excitation loading systems, and restore the real excitation, so that the acquired traction motor signal is closer to the real train to operate, the operation condition of real vehicle components under the fault condition is restored, and the purposes of fault diagnosis and analysis are finally achieved.
3) Wheel set bearing test signal x n The transmission path of (a) and the signal component transmitted into the bearing therein can be represented by the following equation.
x n ＝h n *u n +h e *e n +h d *d n
Wherein x is n For measuring the signal, h n *u n For dynamic response of the system, h e *e n For random noise interference, h d *d n Is a bearing fault impact. The system dynamic response can be modeled by the apparatus in the following figures as the excitation and transmission paths under a real framework. For example: a motor: h is driver *e driver An axle box: h is axle *e axle A gear box: h is gear *e gear Wheel set and rail: h is w *e w ，h r *u r . The failure of the traction motor can be classified as stator failure h stator *e stator And rotor failure h roter *e roter The fault impact of the wheel set and the traction motor bearing can be divided into inner rings h according to different defects inner *e n Outer ring h outer *e n And rolling elements h ball *e n 。
According to different simulated working conditions, different fault types and different transmission excitations, the system can realize the whole train simulation under different real train working conditions, and mainly comprises the following experiments:
1) Wheel set simulation test: the working condition types mainly comprise: the method comprises the following steps of generating excitation signals by a test wheel and a track wheel, wherein the excitation signals comprise rail irregularity, wheel set tread loss/stripping, rail fastener loosening and the like, and the test method comprises the steps of replacing the test wheel and the track wheel with tread faults, changing applied load and the like.
2) For the neutral test: the working condition types mainly comprise: the testing method mainly comprises the steps that the misalignment of the coupler is manually adjusted, and the misalignment is acquired through a displacement sensor.
3) Traction motor bearing simulation test: the working conditions mainly comprise: rotor fault, stator fault, traction motor bearing fault and gear box gear mismatch, its excitation signal mainly produces jointly by traction motor bearing simulation subsystem, and the test method respectively is: replacing a failed rotor, replacing a failed stator, replacing a failed bearing, and replacing a gear with an unmatched size.
In conclusion, the invention provides the integrated train running gear test system which is used for simulating the running state of the running gear of the railway vehicle under the complex working condition, can reduce the online experiment cost and provides an experiment platform for various types of vehicle-mounted sensor equipment.
It is finally necessary to point out here: the above are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention.
Claims (10)
1. An integrated rail vehicle running gear testing system, comprising:
the wheel set simulation subsystem comprises: the device is used for simulating axial and radial loads between train wheel tracks;
the traction motor bearing simulation subsystem: the device is used for simulating the actual rotating speed of a train traction motor bearing and applying a radial load to a test bearing to simulate the fault of the train traction motor bearing;
an auxiliary subsystem: the hydraulic control device is used for controlling the transmission load, the rotating speed of the servo motor and the operation of the hydraulic control device;
the data acquisition subsystem: the method is used for realizing acquisition of analog data.
2. The integrated rail vehicle running gear testing system according to claim 1, wherein the wheel set simulation subsystem comprises a wheel set consisting of replaceable rail wheels (101) and test wheels (102) with outer contours in mutual pressing contact, a wheel set supporting shaft (10) for driving wheel pair rotation, wheel set axle boxes (8) for fixing two ends of the wheel set supporting shaft (10) through bearings (11), and a wheel set supporting seat (9) for fixing the wheel set axle boxes (8), the bottom of the wheel set supporting seat (9) is fixedly arranged on the running gear testing plane (1) through axial or radial sliding rails, and axial and radial load loading is realized through an actuator.
3. The integrated rail vehicle running gear testing system according to claim 2, wherein the wheel set supporting seats (9) corresponding to the rail wheels (101) are loaded with axial loads through axial actuators (103), and the wheel set supporting seats (9) corresponding to the testing wheels (102) are loaded with radial loads through radial actuators (104).
4. The integrated railway vehicle running gear test system according to claim 3, wherein the traction motor bearing simulation subsystem comprises a traction motor (22), a rotating shaft (24), a gear box (14) and a flange joint (12) which are sequentially driven, the flange joint (12) is in transmission connection with a test wheel (102), and wheel pair resistance is introduced through the flange joint (12) to realize simulation of various states of the train traction motor bearing under actual working conditions.
5. The integrated railway vehicle running gear test system according to claim 4, wherein the traction motor bearing simulation subsystem further comprises an external platform supporting device (201) fixedly mounted on the test wheel (102) corresponding to the wheel pair supporting seat (9), and a supporting bearing seat D (20), a supporting bearing seat B (19), a testing bearing radial loading device B (18), a testing bearing radial loading device A (17) and a supporting bearing seat A (16) which are sequentially penetrated through by the rotating shaft along the axial direction of the rotating shaft (24) and fixedly mounted on the external platform supporting device (201), wherein the supporting bearing seat D (20) is provided with a testing bearing (33) rotatably connected with the rotating shaft (24).
6. The integrated rail vehicle running gear test system according to claim 5, wherein the auxiliary subsystem comprises a servo motor (306), a rotating shaft (30), a universal joint (26), an industrial personal computer (27) and a hydraulic control device, the servo motor (306), the rotating shaft (30), the universal joint (26) and the rail wheels (101) are sequentially connected in a transmission mode, the industrial personal computer (27) controls the rotating speed of the servo motor (306) through a frequency converter (28), and the hydraulic control device is controlled through an electric cabinet (304) to drive an actuator to act.
7. The integrated rail vehicle running gear test system according to claim 6, wherein the hydraulic control device comprises an oil tank (301), an oil pump motor (302), an oil cooler (303), an air tank (31), an air tank seat overflow valve (32) and an electromagnetic valve (34), the oil tank (301) is connected with the oil pump motor (302) through an oil pipe (308) and a butterfly valve (305), the oil tank (301) controls the piston rod (37) of the actuator to extend or retract through the air tank seat overflow valve (32) and the electromagnetic valve (34), and the oil cooler (303) is used for cooling oil temperature.
8. The integrated rail vehicle running gear test system according to claim 7, wherein the data acquisition subsystem comprises:
the device comprises a vibration acceleration sensor (105) which is arranged on a test wheel (102) corresponding to a wheel pair axle box (8) and is used for acquiring vibration acceleration signals of a wheel pair, a displacement sensor (204) which is arranged on a supporting bearing seat B (19) and is used for detecting whether a rotating shaft (24) is eccentric, a force sensor (202) which is arranged on a radial loading device B (18) of a test bearing and is used for measuring radial load applied on the rotating shaft (24), a reluctance rotating speed sensor (203) which is arranged on a supporting bearing seat A (16) and is used for detecting the rotating speed of the rotating shaft (24), a triaxial acceleration sensor (205) which is arranged on a supporting bearing seat C (36) and is used for acquiring vibration acceleration signals of a test bearing (33) and a torsion sensor (25) which is arranged on the rotating shaft (30) through a coupling B (29) and is used for acquiring transmission load.
9. The integrated rail vehicle running gear testing system of claim 1, wherein the transmission and excitation signals of the traction motor bearing simulation subsystem comprise:
(1) Bearing vibration signal x d The transmission path of the system is divided into a rail wheel, a test wheel, a gear box and a traction motor, and the signals of the system are expressed as follows:
x d ＝h b *e b +h e *e n +h d *d n
wherein h is b *e b For the vibration response of the bogie, h e *e n For random noise interference, h d *d n The motor fault impact is realized;
(2) Vibration response h of bogie b *e b Regarding wheel pair, axle box, primary suspension, secondary suspension transfer route, then have:
h b *e b ＝h a *e a +h s1 *e s1 +h s2 *e s2 +h g *u g +h w *u w +h r *u r
wherein h is a *e a For axle box vibration signals, h s1 *e s1 、h s2 *e s2 Are respectively primary and secondary suspension vibration excitation h g *u g For vibration excitation of gearboxes, h w *u w For vibration excitation of wheel sets, h r *u r Vibration disturbance of the steel rail;
wheel set vibration excitation in a transmission path simulates tread damage and wheel set abrasion by replacing wheel sets and changing excitation signal forms, and meanwhile, the running working condition of a gear box of a real train in running is simulated by using radial and vertical excitation loading, so that the acquired traction motor signal is closer to the running of the real train, and the running condition of real vehicle components under the fault condition is restored;
(3) Wheel set bearing test signal x n The transmission path of (a) and the signal component transmitted to the bearing are expressed as:
x n ＝h n *u n +h e *e n +h d *d n
wherein x is n For measuring the signal, h n *u n For dynamic response of the system, h e *e n For random noise interference, h d *d n Is the bearing fault impact.
10. The integrated rail vehicle running gear test system according to claim 9, wherein the system realizes the whole vehicle simulation under different real train conditions according to different simulated conditions, fault types and transmission excitation, and specifically comprises:
wheel set simulation test: the corresponding working condition types comprise rail irregularity, wheel set tread loss/stripping and rail fastener loosening, excitation signals are generated by the test wheel and the rail wheel, and the test method comprises the steps of replacing the test wheel and the rail wheel with tread faults and changing applied load;
for the neutral test: the corresponding working condition types comprise that a coupler is not centered, a universal joint is not centered and a rotor is not centered, excitation signals are respectively generated by the coupler, the universal joint and the rotor, the testing method is to manually adjust the non-centering performance of the coupler, and the eccentricity is collected through a displacement sensor;
traction motor bearing simulation test: the corresponding working conditions comprise rotor fault, stator fault, traction motor bearing fault and gear mismatching of a gear box, an excitation signal is generated by a traction motor bearing simulation subsystem, and the test method comprises the steps of replacing a fault rotor, replacing a fault stator, replacing a fault bearing and replacing a gear with unmatched size.
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| CN118090263A (en) * | 2024-04-23 | 2024-05-28 | 中南大学 | Real-time mixed rolling vibration test bed and test method for running state of railway vehicle line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118090263A (en) * | 2024-04-23 | 2024-05-28 | 中南大学 | Real-time mixed rolling vibration test bed and test method for running state of railway vehicle line |
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