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CN-116658596-B - PHM system for subway train fault detection

CN116658596BCN 116658596 BCN116658596 BCN 116658596BCN-116658596-B

Abstract

The application discloses a PHM system for detecting subway train faults, which relates to the technical field of subway train faults and comprises a vehicle-mounted host machine, a gear box, a dynamic PHM fault diagnosis module and a static PHM fault diagnosis module, wherein a gear set is arranged in the gear box; when a subway train is stationary, the fault early warning of the front occurrence is judged secondarily through the static PHM fault diagnosis module, the upper limit early warning of the oil level during oil injection is realized through the liquid level photoelectric sensor, the detection of major oil leakage faults of the gearbox can be realized through refitting, the color sensor is used for detecting whether the lubricating oil is emulsified or not when the train is stationary, and the color sensor can be used for primarily detecting whether the gear breakage fault occurs or not when the train moves.

Inventors

  • WANG SHENGGUO

Assignees

  • 青岛云创智通科技有限公司

Dates

Publication Date
20260505
Application Date
20230609

Claims (8)

  1. 1. The utility model provides a PHM system for subway train fault detection, includes on-vehicle host computer (12), and the output of on-vehicle host computer (12) is respectively through signal connection in urban rail wisdom fortune dimension platform (9), on-the-spot execution module (10) and parking station (11) of distal end, its characterized in that still includes: the gear box (1) is laterally and outwards led out of a driving shaft (3) and a driven shaft (4), the driving shaft (3) and the driven shaft (4) are connected through a gear set (2), the gear set (2) is arranged in the gear box (1), the end part of the driven shaft (4) is connected with a linkage device (5), and the gear box (1) is used for transmission of a subway train; The static PHM fault diagnosis module is specifically a composite sensor (8) which is electrically connected with the input end of the vehicle-mounted host machine (12), wherein the composite sensor (8) is arranged on the side part of the gear box (1), vibration and impact characteristic quantities are extracted through a time-frequency domain analysis method by collecting vibration and impact signals, and fault judgment of the gear box (1) is carried out according to the characteristic frequencies; The dynamic PHM fault diagnosis module consists of a first detection component (6) and a second detection component (7) which comprise photoelectric detection units, wherein the first detection component (6) and the second detection component (7) are electrically connected with the input end of the vehicle-mounted host (12), the first detection component (6) is installed on an oil inlet part (103) of the gear box (1), the second detection component (7) is installed on an oil outlet part (104) of the gear box (1), and the first detection component (6) and the second detection component (7) are used for detecting whether the gear box (1) has tooth breakage fault and lubricating oil emulsification in the operation process and can be applied to upper and lower oil level detection in the gear box (1); The gearbox (1) is formed by inserting a first box body (101) and a second box body (102), the oil inlet part (103) is arranged at the upper part of the gearbox (1), the oil outlet part (104) is arranged at the lower part of the gearbox (1), the first detection component (6) penetrates through the oil inlet part (103), tubular bulges are outwards arranged at penetrating positions at two sides of the oil inlet part (103), and tubular bulges are also arranged at penetrating positions at two sides of the oil outlet part (104) by the second detection component (7) in the same way; The second detection assembly (7) is arranged along the direction parallel to the driving shaft (3), and the first detection assembly (6) is arranged along the direction perpendicular to the driving shaft (3); The linkage device (5) is of a cylindrical structure, an installation groove (503) for inserting a wheel shaft is formed in the end portion of the linkage device, a circular linkage assembly cavity (504) is formed in the inner side of the linkage device, a plurality of telescopic driving pieces (501) are distributed on the side portion of the linkage device at equal intervals along the circumferential direction of the linkage assembly cavity (504), a V-shaped inserting block (502) is connected to the output end of the telescopic driving piece (501), and a sliding track of the V-shaped inserting block (502) is communicated with the linkage assembly cavity (504) along the inscription direction of the linkage assembly cavity (504); The driven shaft (4) comprises a shaft body (401) and a rotating plate (402) fixedly arranged at the end part of the shaft body (401), a plurality of V-shaped positioning grooves (403) are formed in the side part of the rotating plate (402) at equal intervals along the circumferential direction, and the inner side surface of the V-shaped plug-in block (502) is in line with the outline of the V-shaped positioning grooves (403).
  2. 2. The PHM system for detecting a subway train fault according to claim 1, wherein the first detecting assembly (6) has the same structure as the second detecting assembly (7), and taking the second detecting assembly (7) as an example, the PHM system comprises at least two photoelectric refraction columns (705) which are equidistantly distributed along the circumferential direction, a detection part end cover (706) which is in sliding contact with one side end part of the photoelectric refraction column (705), an oil guide part end cover (702) which is arranged at the other side end part of the photoelectric refraction column (705), and a space adjusting ring (703) for adjusting the radial space is sleeved outside each photoelectric refraction column (705); The detection part end cover (706) and the oil guide part end cover (702) are respectively connected to the cylindrical protrusions of the oil drain part (104) in a threaded manner, and the interval adjusting ring (703) is arranged on the outer sides of the cylindrical protrusions and the inner sides of the dust covers (704).
  3. 3. The PHM system for detecting a subway train fault according to claim 2, wherein the detection part end cover (706) is internally provided with a mounting cavity (7062) which is conducted on one side, the conduction part is provided with a lens (7061), the mounting cavity (7062) is internally provided with a mounting plate (7063), and the mounting plate (7063) is additionally provided with a photoelectric signal transmitting part (7064) and a photoelectric signal receiving part (7065); The signal generating parts of the photoelectric signal transmitting part (7064) and the photoelectric signal receiving part (7065) are axially corresponding to corresponding photoelectric refraction columns (705), and the two photoelectric refraction columns (705) are opposite.
  4. 4. A PHM system for detecting a failure of a subway train according to claim 3, wherein the cross section of each photoelectric refraction column (705) is in a fan shape, the inner side of each photoelectric refraction column is axially arranged in a plane shape (7055), the photoelectric refraction column (705) is composed of a reflecting column (7051) and a transmitting column (7052) which are axially connected, and a joint of the reflecting column and the transmitting column is arranged as a reflecting inclined plane (7053).
  5. 5. The PHM system for detecting a failure of a subway train according to claim 4, wherein the distance adjusting ring (703) is formed by connecting a plurality of arc-shaped rods (7031) end to end, and the number of the arc-shaped rods (7031) is the same as the number of the photoelectric refraction columns (705); One end of the arc-shaped rod (7031) is fixedly provided with a plug-in rod (7033), the other side of the arc-shaped rod is provided with a containing bin (7032), an air cylinder is arranged in the containing bin (7032), the containing bin (7032) is in sliding connection with the plug-in rod (7033) adjacent to the arc-shaped rod (7031), and an air arm of the air cylinder is connected to the end face of the plug-in rod (7033); Spacing adjustment ring (703) with meet through crimping piece (707) between photoelectricity refracting column (705), crimping piece (707) include diaphragm (7071), spacing arch (7073) have been set firmly in the outside of diaphragm (7071), sliding groove (7034) have been seted up along length direction to the straight section of inboard of arc pole (7031), spacing arch (7073) with sliding groove (7034) sliding connection, connecting rod (7072) have been set firmly to the inboard of diaphragm (7071), the back of reflecting column (7051) is equipped with locating hole (7054), the other end of connecting rod (7072) pass the tubular bulge of oil drain (104) connect in locating hole (7054), and tubular bulge with the junction of connecting rod (7072) is provided with recess (1041).
  6. 6. The PHM system for detecting a failure of a subway train according to claim 5, wherein the second detecting unit (7) further comprises a magnetic oil guide (701) axially sleeved inside each of the photoelectric refraction columns (705), and the magnetic oil guide (701) and the oil guide end cover (702) are integrally provided; The magnetic oil guide part (701) is formed by sequentially and axially connecting a straight cylinder (7012), a magnetic column (7011) and a buffer column-shaped plate (7013), the magnetic column (7011) is arranged in a fan shape, the number of the magnetic columns is equal to that of the photoelectric refraction columns (705) along the circumferential direction of the straight cylinder (7012), assembly intervals are arranged between the adjacent magnetic columns (7011), the inner side of the straight cylinder (7012) is axially provided with an oil guide channel (7014), and an impurity detection cavity (7015) is formed between the inner side of the straight cylinder (7012) and the buffer column-shaped plate (7013) and at the corresponding position of the inner side of each magnetic column (7011); The oil guide end cover (702) comprises a sealing female cover (7021) screwed with the end part of the cylindrical bulge of the oil drain part (104), a circular through hole (7022) axially corresponding to the oil guide channel (7014) is formed in the center of the sealing female cover (7021), and a sealing sub cover (7023) screwed with the position corresponding to the circular through hole (7022) in the sealing female cover (7021).
  7. 7. The PHM system for detecting a failure of a subway train according to claim 6, wherein the side portions of the magnetic columns (7011) are sequentially provided with a magnetic prism face (70112) and a magnetic inner inclined face (70111) from outside to inside, and the magnetic inner inclined faces (70111) on both sides of the magnetic columns (7011) are combined at the ends.
  8. 8. The PHM system for detecting a failure of a subway train according to claim 7, wherein an installation gap is provided between the photoelectric refraction columns (705), and each of the magnetic columns (7011) has an installation gap corresponding to the installation gap in a radial direction.

Description

PHM system for subway train fault detection Technical Field The application relates to the technical field of subway train fault detection, in particular to a PHM system for subway train fault detection. Background The transmission system of the gear box is applied to a subway train by virtue of excellent mechanical properties of the gear, the gear box is used as the most important component part in the transmission system of the subway train and is arranged on a bogie of the vehicle, one end of the transmission system of the gear box is elastically suspended with the bogie, and the other end of the transmission system of the gear box is connected with an axle of the bogie. The gear is an important part for transmission in the gear box, vibration generated by gear meshing is also the most main vibration source of the gear box, the gear box body plays a role in protecting the transmission gear, supporting bearings and the like, a large amount of lubricating oil for splash lubrication is arranged in the box body, and the sealing of the box body ensures the cleanness of the lubricating oil in the box body. In the prior art, the problem of color change, emulsification and degradation of lubricating oil in a gear box occurs, the main reasons of emulsification are that external dust, water vapor and the like are sucked into the interior of the gear box from a gear box breather or a sealing part, particularly when a subway vehicle passes through a tunnel, negative pressure is formed at the gear box breather, pollution tiny particles are easy to flow backward along with air flow and cause emulsification or blackening of the lubricating oil, so that the subway train needs to have the capability of detecting emulsification faults on the lubricating oil, because the box adopts a non-contact labyrinth sealing structure, splashed oil mist can overflow outwards along a labyrinth sealing gap, part of the oil mist continuously diffuses outwards and leaks in the overflow process, the gear box is damaged by external force, the change of the oil level of the lubricating oil is caused, the subway train also needs to have the capability of detecting oil leakage faults of the box, the gear is likely to have the condition of broken teeth, the broken teeth of the gear belongs to serious faults, the occurrence of fatigue or overload is mainly needs to have the capability of detecting broken teeth of the gear, and in addition, the fault integration and fault information remote transmission capability of the subway train needs to be improved, so that the conventional device cannot completely realize the functions, and the unified fault management system needs to be designed on the premise that the basis of the conventional device can solve the fault and the system of the subway train. Disclosure of Invention The invention provides a PHM system for detecting the faults of a subway train, which is characterized in that a static PHM fault diagnosis module and a dynamic PHM fault diagnosis module are combined for use, when the running noise of the subway train is large, the dynamic PHM fault diagnosis module is used for detecting the color of lubricating oil, further judging whether a gear box breaks down or not, and after the subway train is stationary, the static PHM fault diagnosis module is used for carrying out secondary judgment on the fault early warning which occurs before by utilizing gear vibration analysis so as to improve the safety and stability in the using process of the subway train, and the specific implementation mode is as follows: a PHM system for subway train fault detection, comprising: The output end of the vehicle-mounted host is connected with the remote urban rail intelligent operation and maintenance platform, the site execution module and the station through signals respectively; the gear box is laterally and outwards led out to be provided with a driving shaft and a driven shaft, the driving shaft and the driven shaft are connected through a gear set, the gear set is arranged in the gear box, the end part of the driven shaft is connected with a linkage device, and the gear box is used for transmission of a subway train; the static PHM fault diagnosis module is specifically a composite sensor electrically connected with the input end of the vehicle-mounted host, the composite sensor is arranged on the side part of the gear box, the characteristic quantity of vibration and impact is extracted through a time-frequency domain analysis method by collecting vibration and impact signals, and fault judgment of the gear box is carried out according to the characteristic frequency; The dynamic PHM fault diagnosis module comprises a first detection component and a second detection component which comprise photoelectric detection units, the first detection component and the second detection component are electrically connected with the input end of the vehicle-mounted host, the first detection component is installed on a