CN110145549B - Monitoring and early warning system for automobile intelligent hub bearing unit - Google Patents
Monitoring and early warning system for automobile intelligent hub bearing unit Download PDFInfo
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- CN110145549B CN110145549B CN201910313545.0A CN201910313545A CN110145549B CN 110145549 B CN110145549 B CN 110145549B CN 201910313545 A CN201910313545 A CN 201910313545A CN 110145549 B CN110145549 B CN 110145549B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0047—Hubs characterised by functional integration of other elements
- B60B27/0068—Hubs characterised by functional integration of other elements the element being a sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/008—Identification means, e.g. markings, RFID-tags; Data transfer means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
- G01K7/183—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer characterised by the use of the resistive element
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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
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention relates to a monitoring system of a bearing, in particular to a monitoring and early warning system of an automobile intelligent hub bearing unit, which comprises a temperature sensor, a vibration sensor, a signal analysis chip and a battery for supplying power to the signal analysis chip, wherein the temperature sensor and the vibration sensor are connected with the signal analysis chip; the system comprises a signal analysis chip, a wireless transmission module, an on-board controller, an alarm device and an LCD display, wherein the encryption module is installed on the signal analysis chip, the wireless transmission module is connected with the signal analysis chip and transmits analyzed information to the on-board controller through the encryption module, the LCD display is connected with the on-board controller and displays a bearing temperature value and vibration frequency, and the alarm device is connected with the on-board controller. The damage of temperature balance before the failure of the hub bearing is an important basis for monitoring and early warning, and the prediction and the timely maintenance of the failure of the bearing are realized through the real-time monitoring and the timely early warning of the platform system, so that the safety and the reliability of an automobile are improved to a great extent.
Description
Technical Field
The invention relates to a bearing monitoring system, in particular to an automobile intelligent hub bearing unit monitoring and early warning system.
Background
In our country, the amount of commercial car reserves is continuously increasing. The hub bearing unit is an important part of an automobile, the main functions of the hub bearing unit are supporting automobile load and guiding the rotation of a hub, and the hub bearing unit needs to bear radial load and axial load at the same time, so that the failure of the bearing needs to be warned in time. The hub bearing can generate friction collision between internal parts in the operation process, heat can be continuously generated and dissipated, and finally heat balance can be formed. If bearing failure phenomena such as cracks, fractures, mutual gluing and grease drying of internal parts of the bearing occur, heat generation can be increased rapidly, thermal balance of the bearing can be broken, temperature can rise rapidly, a new thermal balance is formed finally, the thermal balance temperature at the moment can be far higher than the original balance, meanwhile, bearing parts can be further damaged by high temperature of the bearing, the new balance can be broken rapidly, thermal balance with higher temperature can be further established, and vicious circle of temperature can be formed.
The detection of bearing temperature in existing monitoring systems is indirect, i.e. a temperature sensor is mounted at the periphery of the bearing and detects the temperature of the bearing through heat conduction, for example, application numbers: 201711175675.X, title of the invention: bearing operating condition monitored control system.
Disclosure of Invention
The invention provides an automobile intelligent hub bearing unit monitoring and early warning system aiming at the defect of poor stability of a sensor for detecting a bearing temperature value and a vibration value in the prior art.
In order to solve the technical problem, the invention is solved by the following technical scheme:
the monitoring and early warning system for the automobile intelligent hub bearing unit comprises a temperature sensor directly mounted on a bearing, a vibration sensor directly mounted on the bearing, a signal analysis chip and a battery for supplying power to the signal analysis chip, wherein the temperature sensor and the vibration sensor are connected with the signal analysis chip and transmit monitored signals to the signal analysis chip; the device comprises a signal analysis chip, an encryption module, a wireless sending module, a vehicle-mounted controller, an alarm device and an LCD display, wherein the encryption module is installed on the signal analysis chip, the wireless sending module is connected with the signal analysis chip and sends analyzed information to the vehicle-mounted controller through the encryption module, the LCD display is connected with the vehicle-mounted controller and displays a bearing temperature value and vibration frequency, the alarm device is connected with the vehicle-mounted controller, and the alarm device is used for prompting that the temperature value and the vibration frequency exceed set values.
The invention designs a set of monitoring and early warning system for solving the problem before the failure of the hub bearing based on the damage of the temperature balance before the failure of the hub bearing. The damage of temperature balance before the failure of the hub bearing is an important basis for monitoring and early warning, and the prediction and the timely maintenance of the failure of the bearing are realized through the real-time monitoring and the timely early warning of the platform system, so that the safety and the reliability of an automobile are improved to a great extent.
Preferably, the vibration sensor also comprises a shell, a heat insulation gasket, a heat insulation sleeve, a signal rod and a vibration transmission metal rod; the temperature sensor is arranged on the shell, the signal analysis chip and the battery are arranged in the shell, and the heat insulation gasket is sleeved on the temperature sensor and connected with the end face of the shell; the heat insulation sleeve is arranged on the inner wall of the channel of the shell and is connected with the heat insulation gasket, and a fixing plate for fixing the battery is arranged on the channel in the heat insulation sleeve; the signal rod penetrates through the fixing plate and is fixedly connected with the fixing plate, one end of the signal rod penetrates through the heat insulation gasket and is fixedly connected with the temperature sensor, the other end of the signal rod is fixedly connected with the signal analysis chip, and the signal rod transmits signals collected by the temperature sensor to the signal analysis chip; vibration transmission metal bar one end is connected with the casing, and its other end is connected with vibration sensor, and vibration sensor gathers the vibration signal of bearing and sends for the analysis of signal analysis chip through vibration transmission metal bar. The signal pole can send the temperature signal that temperature sensor gathered for signal analysis chip on the one hand, and on the other hand can support the fixed plate, has guaranteed the stability of fixed plate to the stability of battery has been guaranteed. The heat insulation sleeve and the heat insulation gasket are used for protecting the battery and the signal analysis chip in the heat insulation sleeve and the heat insulation gasket, so that the battery and the signal analysis chip can work normally, and meanwhile, the heat insulation gasket is used for preventing the shell from rigidly colliding with the hub bearing.
Preferably, the shell comprises a bolt, a screw head and a cover plate, a first channel is arranged in the bolt, a second channel is arranged in the screw head, the cover plate covers a port of the second channel and is fixedly connected with the screw head, the first channel is communicated with the second channel, the diameter of the first channel is smaller than that of the second channel, one end of the heat insulation sleeve is arranged in the first channel, and the other end of the heat insulation sleeve is arranged in the second channel. The shell in the shape of the bolt and the screw head is convenient for people to install the sensor; the sensor has good hiding performance and can prevent lawless persons from being damaged.
Preferably, the mounting plate is mounted on a heat shield in the first channel and the signal analysis chip is mounted on a heat shield in the second channel.
Preferably, the vibration sensor is mounted on the screw head and the vibration transmitting metal rod is received in the second channel. The sensor can also detect vibration signals of the bearing at the same time, the shapes and the structures of the same part before and after being damaged are changed, and the amplitudes and the frequency domains of the parts are different after the parts are subjected to the same interference, so that the important basis for monitoring and distinguishing the damaged parts and the failures of the hub bearing is provided. The vibration transmission metal bar is installed in the second passageway, and compact structure on the one hand, on the other hand does not have external interference because the second passageway is independent space, and the vibration transmission metal bar detects the precision height.
Preferably, the temperature and vibration sensor further comprises a signal transmitting antenna, the signal transmitting antenna is mounted on the screw head and connected with the signal analysis chip, and the signal transmitting antenna transmits the temperature signal and the vibration signal analyzed by the signal analysis chip. The signal transmitting antenna can send the temperature information and the vibration information analyzed by the signal analysis chip to a central control platform in the cab, so that people can know the working environment of the bearing in time.
Preferably, a shaft sleeve is fixed on the signal rod between the signal analysis chip and the cover plate, at least two fan blades are fixed on the shaft sleeve, at least two first ventilation openings are formed in the cover plate, a first elastic cover plate used for covering the first ventilation openings is installed on the inner end face of the cover plate, when the bearing unit is static, the first ventilation openings are covered by the first elastic cover plate, and when the bearing unit rotates, the first elastic cover plate is opened inwards. The heat insulating sleeve is not thermal-insulated completely, and bearing unit pivoted time has been of a specified duration, and the temperature in the heat insulating sleeve also can constantly rise, and bearing unit is when rotating, and first vent is opened to first elastic cover piece, and first vent makes heat insulating sleeve and outer annular formation convection current, reaches the radiating effect, axle sleeve and last flabellum and signal pole fixed connection, and it rotates along with the bearing rotation, and the flabellum rotates the air convection in the heat insulating sleeve with higher speed to dispel the heat with higher speed.
Preferably, the screw head is a hexagonal screw head, each side surface of the screw head is provided with a mounting groove, the bottom surface of each mounting groove is provided with a second ventilation opening communicated with the heat insulation sleeve, a second elastic cover plate used for covering the second ventilation opening is mounted in each mounting groove, when the bearing unit is static, the second ventilation opening is covered by the second elastic cover plate, and when the bearing unit rotates, the second elastic cover plate is opened. Because the bearing produces centrifugal action when rotating, the second shell fragment is thrown away, and the heat dissipation of taking a breath can be carried out through the second vent to the air in the thermal-insulated cover, has further accelerated the heat in the thermal-insulated cover and has dispelled.
The temperature sensor is arranged in the second groove, and the shell is arranged in the first groove and is in threaded connection with the bearing shell. Sensor and bearing housing threaded connection, sensor easy dismounting, temperature sensor and second recess area of contact are wide, and temperature sensor detection effect is good.
Preferably, a first mounting hole is formed in the bearing shell, a first inner ring is mounted in the first mounting hole, a first conical retainer is mounted between the first inner ring and the bearing shell, and a first roller is mounted on the first retainer; and a second mounting hole is formed in the bearing shell and communicated with the first mounting hole, a second inner ring is arranged in the mounting hole in the second mounting hole, a second retainer which is conical is arranged between the second inner ring and the bearing shell, and a second roller is arranged on the second retainer.
Due to the adoption of the technical scheme, the invention has the remarkable technical effects that:
the damage of temperature balance before the failure of the hub bearing is an important basis for monitoring and early warning, and the prediction and the timely maintenance of the failure of the bearing are realized through the real-time monitoring and the timely early warning of the platform system, so that the safety and the reliability of an automobile are improved to a great extent. The sensor is embedded into the hub bearing, the accuracy of the sensor detection is high, the system can record and display the temperature information of the hub bearing unit in real time, and timely early warning of the failed hub bearing unit is realized.
Drawings
FIG. 1 is a schematic diagram of the architecture of the system framework of the present invention.
Fig. 2 is a schematic view of the structure of the sensor of the present invention.
Fig. 3 is a schematic structural view of the housing of fig. 2.
Fig. 4 is a schematic view of the hub bearing unit and sensor assembly structure of the present invention.
Fig. 5 is a sectional structural view of the hub bearing unit in fig. 4.
The names of the parts indicated by the numerical references in the above figures are as follows: wherein, 10-shell, 11-temperature sensor, 12-signal analysis chip, 13-battery, 14-signal rod, 15-fixed plate, 16-vibration transmission metal bar, 17-vibration sensor, 19-bearing shell, 20-first inner ring, 21-first retainer, 22-first roller, 23-second inner ring, 24-second retainer, 25-second roller, 26-heat insulation gasket, 27-shaft sleeve, 28-flabellum, 29-second elastic cover plate, 30-heat insulation sleeve, 31-encryption module, 32-wireless transmission module, 33-vehicle-mounted controller, 34-alarm device, 35-LCD display, 36-revolution speed sensor, 101-bolt, 102-screw head, 103-cover plate, 191-first groove, 192-second groove, 193-first mounting hole, 194-second mounting hole, 1011-first channel, 1021-second channel, 1022-mounting groove, 1031-first ventilation opening.
Detailed Description
The invention will be described in further detail below with reference to the accompanying figures 1-5 and examples.
Example 1
The intelligent hub bearing unit monitoring and early warning system for the automobile comprises a temperature sensor 11 directly mounted on a bearing, a vibration sensor 17 directly mounted on the bearing, a signal analysis chip 12 and a battery 13 for supplying power to the signal analysis chip 12, wherein the battery 13 is a button battery. The temperature sensor 11 and the vibration sensor 17 are both connected with the signal analysis chip 12 and transmit the monitored signals to the signal analysis chip 12; the device comprises an encryption module 31, a wireless sending module 32, an on-board controller 33, an alarm device 34 and an LCD display 35, wherein the encryption module 31 is installed on a signal analysis chip, the wireless sending module 32 is connected with the signal analysis chip 12 and sends analyzed information to the on-board controller 33 through the encryption module 31, the LCD display 35 is connected with the on-board controller 33 and displays a bearing temperature value and a vibration frequency, the alarm device 34 is connected with the on-board controller 33, and the alarm device 34 is used for prompting that the temperature value and the vibration frequency exceed set values.
The automobile state detection system comprises a rotating speed sensor 36, the rotating speed sensor 36 detects the current running state of the automobile, the rotating speed sensor 36 is connected with the signal analysis chip 12, if the automobile is in a static state, the idle system can be closed by the monitoring and early warning system, the signal analysis chip 12 closes the temperature sensor 11 and the wireless sending module 32, so that the temperature sensor 11 and the wireless sending module 32 are in a closed state, namely the temperature monitoring system is in a dormant state. If the automobile state detection system detects that the automobile is in the running state, the temperature sensor 11 collects temperature values every 1S, and after the temperature signals are processed by the signal analysis chip 12, protocol encryption is carried out through the encryption module 31 and the temperature signals are sent to the vehicle-mounted controller 33 through the wireless sending module 32. When the temperature value is higher than the alarm temperature point, the temperature value is defined as an abnormal temperature by the signal analysis chip 12 and is sent to the vehicle-mounted controller 33 through the wireless sending module 32, and the vehicle-mounted controller 33 triggers the alarm device 34 to remind a driver of replacing and maintaining the hub bearing in time.
The vehicle-mounted controller 33 is used for receiving the data of the temperature sensor 11, storing and analyzing the data, and is connected with a vehicle-mounted system through a CAN bus and an RS485 bus, and the temperature value CAN be displayed on the LCD 35 in real time and also CAN display a historical temperature curve. When the temperature exceeds the alarm value, the monitoring and early-warning system sends out an alarm sound to remind a driver to carry out corresponding processing so as to ensure the safety of the vehicle in the driving process. After receiving the abnormal temperature, the onboard controller 33 may trigger not only the alarm system but also the remote transmission system to prompt the driver to freely select whether to transmit the life information of the hub bearing to the remote detection center.
1. Temperature acquisition scheme
The temperature acquisition part is the temperature of a wheel hub and a wheel shaft, the temperature of the part can reach 200 ℃ at most, the temperature sensor 11 adopts a PT100 platinum resistance temperature sensor, the temperature acquisition range is-200 ℃ to +850 ℃, and the design has the advantages of good vibration resistance, good stability, high accuracy, good linearity and wide range.
2. ZigBee protocol encryption scheme
The ZigBee transmits data by adopting a frequency of 2.4GHz, the transmission speed is very high, 16 channels capable of being encrypted by a protocol are provided, and the temperature sensor 11 selects a channel with the minimum interference to carry out networking when networking with the vehicle-mounted controller 33 so as to ensure the stability of data transmission; ZigBee has a repeated transmission mechanism, and can ensure that a vehicle-mounted control system can receive data of the sensor every time.
3. Wireless transmission scheme
The wireless sending module 32 adopts ZigBee transmission for transmission, the ZigBee scheme adopts the latest EFR32MG series of Silicon labs, the maximum transmitting power of the chip can reach 19dbm, the sensitivity can reach-102.7 dbm, and the current in a sleep mode is as low as 2.2 uA. When the chip works at 19dbm, the transmission distance can reach 400 meters in a visible range. The temperature receiving is in an RS485 mode, a standard RS485 interface is adopted, a temperature measuring circuit is integrated, and the sensor is used as a 485 slave machine.
4. Hardware design scheme
(1) In order to avoid the influence of temperature on the sensor, a temperature acquisition probe and a circuit emission part are adopted for separation treatment, and a heat insulation material is adopted between the temperature sensor 11 and a test part for heat insulation treatment;
(2) 1-16 paths of information transmission and receiving channels are selected, and the transmission distance is 100 meters;
(3) the probe of the temperature acquisition sensor adopts PT100, and the temperature range is 0-250 ℃;
(4) the power supply mode adopts button batteries for power supply and adopts high-temperature-resistant packaging to ensure the use standard of 3 years.
5. Technical specification scheme
(1) Temperature range: 0 to 250 ℃;
(2) the wiring mode is as follows: 4-wire system, power lines VCC, GND, communication lines 485A and 485B;
(3) and (3) address numbering: 1-254 (default to 1);
(4) baud rate: 2400bit/s, 4800bit/s, 9600bit/s (default 9600 bit/s);
(5) data bit: 8 bits;
(6) stopping the position: 1 bit.
The monitoring and early warning system also comprises a shell 10, a temperature sensor 11 is arranged on the shell 10, a battery 13 for supplying power to a signal analysis chip 12 is arranged in the shell 10, the temperature sensor 11 is connected with the signal analysis chip 12 and sends the collected temperature signal to the signal analysis chip 12, the temperature sensor 11 collects the temperature signal once at an interval of 1 second and transmits the temperature information to a temperature processing module of the signal analysis chip 12, the signal analysis chip 12 analyzes the temperature signal and intelligently identifies whether the temperature is in a normal state or a failure state, if the temperature is in the normal state, the signal analysis chip 12 sends the signal to a central console of a cab through a wireless sending module 32, if the temperature exceeds an alarm temperature point, the temperature signal analysis chip can judge the abnormal temperature condition, on one hand, the abnormal temperature information is transmitted to a vibration processing module in the signal analysis chip 12 to further analyze bearing failure parts, on the other hand, the signal analysis chip 12 transmits a signal to the center console of the cab via the wireless transmission module 32, and the center console gives an alarm and displays an abnormal temperature.
Still include thermal-insulated gasket 26, the radiation shield 30, signal pole 14, vibration transmission metal bar 16 and vibration sensor 17, thermal-insulated gasket 26 suit is on temperature sensor 11 and is connected with the terminal surface of casing 10, thermal-insulated gasket 26 is connected with the terminal surface veneer of casing 10, radiation shield 30 installs on the passageway in casing 10 and is connected with thermal-insulated gasket 26, install the fixed plate 15 that quantity is two on the passageway in radiation shield 30, interference fit is connected between fixed plate 15 and the radiation shield 30, battery 13 installs on fixed plate 15, battery 13 is button cell, be fixed with six button cell on a fixed plate 15. The signal analysis chip 12 is installed in the heat insulation sleeve 30, and the heat insulation sleeve 30 isolates the temperature, so that the signal analysis chip 12 and the battery 13 can work normally.
The signal rod 14 penetrates through the fixing plate 15 and is connected with the fixing plate in an interference fit mode, one end of the signal rod 14 penetrates out of the heat insulation gasket 26 and is fixedly connected with the temperature sensor 11, the other end of the signal rod 14 is fixedly connected with the signal analysis chip 12, and the signal rod 14 transmits signals collected by the temperature sensor 11 to the signal analysis chip 12.
The vibration sensor 17 is installed on the screw head 102, the vibration transmission metal rod 16 is accommodated in the second channel 1021, one end of the vibration transmission metal rod 16 is connected with the shell 10, the other end of the vibration transmission metal rod is connected with the vibration sensor 17, and the vibration sensor 17 collects vibration signals of the bearing through the vibration transmission metal rod 16 and sends the vibration signals to the signal analysis chip 12 for analysis. The hub bearing is interfered by the outside world in the operation process, and a vibration phenomenon can appear in the whole bearing. Because the shapes and weights of internal parts of the bearing are different, and the transfer functions of the internal parts are different, the internal parts are subjected to the same interference signals, and the represented vibration time domains and frequency domains are different, which is an important basis for monitoring and distinguishing different parts of the hub bearing. Similarly, the form and the structure of the same part before and after being damaged are changed, and the amplitude and the frequency domain of the part after being subjected to the same interference are different, which is an important basis for monitoring and distinguishing the damaged and failed parts of the hub bearing. The signal analysis chip 12 separates the vibration of different parts according to the principle that the vibration frequencies of different parts are different, intelligently identifies normal vibration and failure vibration, and transmits the analyzed information to the central console through the wireless transmission module 32, so that the failure time point of the bearing can be predicted in time.
The shell 10 comprises a bolt 101, a screw head 102 and a cover plate 103, a first channel 1011 is arranged in the bolt 101, a second channel 1021 is arranged in the screw head 102, the cover plate 103 covers a port of the second channel 1021 and is fixedly connected with the screw head 102, the first channel 1011 and the second channel 1021 are cylindrical channels, the first channel 1011 is communicated with the second channel 1021, the diameter of the first channel 1011 is smaller than that of the second channel 1021, one end of a heat insulation sleeve 30 is arranged in the first channel 1011, and the other end of the heat insulation sleeve is arranged in the second channel 1021. The fixing plate 15 is mounted on the heat insulating sleeve 30 in the first passage 1011, and the signal analyzing chip 12 is mounted on the heat insulating sleeve 30 in the second passage 1021. The outer end of the screw head 102 is covered with a cover plate, the cover plate is glued with the screw head 102, and the signal rod 14 passes through the signal analysis chip 12 and is fixedly connected with the cover plate.
The temperature and vibration signal analyzing device further comprises a wireless sending module 32, wherein the wireless sending module 32 is installed on the screw head 102, the wireless sending module 32 is connected with the signal analyzing chip 12, and the wireless sending module 32 emits the temperature signal and the vibration signal which are analyzed by the signal analyzing chip 12.
The signal rod 14 between the signal analysis chip 12 and the cover plate 103 is fixed with a shaft sleeve 27, the shaft sleeve 27 is fixed with at least two fan blades 28, the number of the fan blades 28 is two, the shaft sleeve 27 is integrated with the fan blades 28, the shaft sleeve 27 is fixedly connected with the signal rod 14 through screws, the cover plate 103 is provided with at least two first vents 1031, the number of the first vents 1031 is six, the inner end surface of the cover plate 103 is provided with a first elastic cover plate for covering the first vents 1031, when the bearing unit is static, the first elastic cover plate covers the first vents 1031, and when the bearing unit rotates, the first elastic cover plate is opened inwards.
The screw head 102 is a hexagonal screw head, each side surface of the screw head 102 is provided with a mounting groove 1022, the bottom surface of the mounting groove 1022 is provided with a second ventilation opening communicated with the heat insulation sleeve 30, a second elastic cover sheet 29 used for covering the second ventilation opening is mounted in the mounting groove 1022, when the bearing unit is static, the second elastic cover sheet 29 covers the second ventilation opening, and when the bearing unit rotates, the second elastic cover sheet 29 is opened.
Example 2
Embodiment 2 has substantially the same features as embodiment 1, except that embodiment 2 further includes a bearing housing 19; the sensor, the bottom surface of first recess 191 is equipped with second recess 192, and temperature sensor 11 installs in second recess 192, and casing 10 installs in first recess 191 and with bearing housing 19 threaded connection. The signal analysis chip 12 analyzes whether the temperature is in a normal state or a failure state, if the temperature is in the normal state, the signal analysis chip 12 sends a signal to a central console of the cab through the wireless transmission module 32, if the temperature exceeds an alarm temperature point, the temperature signal analysis chip can judge the abnormal temperature condition, on one hand, the abnormal temperature information is transmitted to a vibration processing module in the signal analysis chip 12 to further analyze the bearing failure component, on the other hand, the signal analysis chip 12 sends the signal to the central console of the cab through the wireless transmission module 32, and the central console alarms and displays the abnormal temperature. The hub bearing is interfered by the outside world in the operation process, and a vibration phenomenon can appear in the whole bearing. Because the shapes and weights of internal parts of the bearing are different, and the transfer functions of the internal parts are different, the internal parts are subjected to the same interference signals, and the represented vibration time domains and frequency domains are different, which is an important basis for monitoring and distinguishing different parts of the hub bearing. Similarly, the form and the structure of the same part before and after being damaged are changed, and the amplitude and the frequency domain of the part after being subjected to the same interference are different, which is an important basis for monitoring and distinguishing the damaged and failed parts of the hub bearing. The signal analysis chip 12 separates the vibration of different parts according to the principle that the vibration frequencies of different parts are different, intelligently identifies normal vibration and failure vibration, and transmits the analyzed information to the central console through the wireless transmission module 32, so that the failure time point of the bearing can be predicted in time.
A first mounting hole 193 is formed in the bearing housing 19, a first inner ring 20 is mounted in the first mounting hole 193, a first retainer 21 is mounted between the first inner ring 20 and the bearing housing 19, the first retainer 21 is a conical retainer, and a first roller 22 is mounted on the first retainer 21.
A second mounting hole 194 is formed in the housing 19, the second mounting hole 194 is communicated with the first mounting hole 193, a second inner ring 23 is arranged in the mounting hole in the second mounting hole 194, a second retainer 24 is arranged between the second inner ring 23 and the bearing housing 19, the second retainer 24 is a conical retainer, and second rollers 25 are arranged on the second retainer 24.
Example 3
Embodiment 3 has substantially the same features as embodiment 1, except that in embodiment 3, the housing 10 is a bolt 101 without a screw head 102, and the battery 13 and the signal analysis chip 12 are mounted in a first channel 1011 in the bolt 101.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (9)
1. The monitoring and early warning system for the automobile intelligent hub bearing unit comprises a temperature sensor (11) directly mounted on a bearing, a vibration sensor (17) directly mounted on the bearing, a signal analysis chip (12) and a battery (13) for supplying power to the signal analysis chip (12), wherein the temperature sensor (11) and the vibration sensor (17) are connected with the signal analysis chip (12) and transmit monitored signals to the signal analysis chip (12); the method is characterized in that: also comprises an encryption module (31), a wireless sending module (32), a vehicle-mounted controller (33), an alarm device (34), an LCD display (35) and a rotating speed sensor (36), the encryption module (31) is installed on the signal analysis chip, the wireless sending module (32) is connected with the signal analysis chip (12) and sends analyzed information to the vehicle-mounted controller (33) through the encryption module (31), the LCD display (35) is connected with the vehicle-mounted controller (33) and displays a bearing temperature value and vibration frequency, the alarm device (34) is connected with the vehicle-mounted controller (33), the alarm device (34) is used for prompting that the temperature value and the vibration frequency exceed set values, the rotating speed sensor (36) is connected with the signal analysis chip (12), and the signal analysis chip (12) controls the temperature sensor (11) to collect and the wireless sending module (32) to send the information through rotating speed signals; the device also comprises a shell (10), a heat insulation gasket (26), a heat insulation sleeve (30), a signal rod (14) and a vibration transmission metal rod (16); the temperature sensor (11) is arranged on the shell (10), the signal analysis chip (12) and the battery (13) are both arranged in the shell (10), and the heat insulation gasket (26) is sleeved on the temperature sensor (11) and is connected with the end face of the shell (10); the heat insulation sleeve (30) is arranged on the inner wall of the channel of the shell (10) and connected with the heat insulation gasket (26), and a fixing plate (15) for fixing the battery (13) is arranged on the channel in the heat insulation sleeve (30); the signal rod (14) penetrates through the fixing plate (15) and is fixedly connected with the fixing plate, one end of the signal rod (14) penetrates through the heat insulation gasket (26) and is fixedly connected with the temperature sensor (11), the other end of the signal rod is fixedly connected with the signal analysis chip (12), and the signal rod (14) transmits signals collected by the temperature sensor (11) to the signal analysis chip (12); one end of the vibration transmission metal rod (16) is connected with the shell (10), the other end of the vibration transmission metal rod is connected with the vibration sensor (17), and the vibration sensor (17) collects vibration signals of the bearing through the vibration transmission metal rod (16) and sends the vibration signals to the signal analysis chip (12) for analysis.
2. The automobile intelligent hub bearing unit monitoring and early warning system of claim 1, characterized in that: casing (10) are including bolt (101), spiral shell head (102) and apron (103), be equipped with first passageway (1011) in bolt (101), be equipped with second passageway (1021) in spiral shell head (102), apron (103) lid closes the port of second passageway (1021) and with spiral shell head (102) fixed connection, first passageway (1011) and second passageway (1021) intercommunication, the diameter of first passageway (1011) is less than the diameter of second passageway (1021), install in first passageway (1011) thermal-insulated cover (30) one end, install in second passageway (1021) its other end.
3. The automobile intelligent hub bearing unit monitoring and early warning system of claim 2, wherein: the fixing plate (15) is mounted on the heat insulating sleeve (30) in the first passage (1011), and the signal analysis chip (12) is mounted on the heat insulating sleeve (30) in the second passage (1021).
4. The automobile intelligent hub bearing unit monitoring and early warning system of claim 2, wherein: the vibration sensor (17) is mounted on the screw head (102), and the vibration transmission metal rod (16) is accommodated in the second channel (1021).
5. The automobile intelligent hub bearing unit monitoring and early warning system of claim 2, wherein: the temperature and vibration signal analyzing device is characterized by further comprising a signal transmitting antenna (18), wherein the signal transmitting antenna (18) is installed on the screw head (102), the signal transmitting antenna (18) is connected with the signal analyzing chip (12), and the signal transmitting antenna (18) transmits the temperature signal and the vibration signal which are analyzed by the signal analyzing chip (12).
6. The monitoring and early warning system for the automobile intelligent hub bearing unit according to any one of claims 2 to 5, wherein: the signal pole (14) between signal analysis chip (12) and apron (103) is fixed with axle sleeve (27), be fixed with quantity on axle sleeve (27) and be two flabellum (28) at least, offer quantity on apron (103) and be two at least first vent (1031), the interior terminal surface of apron (103) is installed and is used for closing the first elasticity cover plate of first vent (1031), when the bearing unit is static, first elasticity cover plate lid closes first vent (1031), when the bearing unit rotates, first elasticity cover plate inwards opens.
7. The automobile intelligent hub bearing unit monitoring and early warning system of claim 6, wherein: the screw head (102) is a hexagonal screw head, each side of the screw head (102) is provided with a mounting groove (1022), the bottom surface of the mounting groove (1022) is provided with a second ventilation opening communicated with the heat insulation sleeve (30), a second elastic cover sheet (29) used for covering the second ventilation opening is mounted in the mounting groove (1022), when the bearing unit is static, the second ventilation opening is covered by the second elastic cover sheet (29), and when the bearing unit rotates, the second elastic cover sheet (29) is opened outwards.
8. The automobile intelligent hub bearing unit monitoring and early warning system of claim 7, characterized in that: the temperature sensor comprises a bearing shell (19), wherein a first groove (191) is formed in the bearing shell (19), a second groove (192) is formed in the bottom surface of the first groove (191), a temperature sensor (11) is installed in the second groove (192), and a shell (10) is installed in the first groove (191) and is in threaded connection with the bearing shell (19).
9. The automobile intelligent hub bearing unit monitoring and early warning system of claim 8, wherein: a first mounting hole (193) is formed in the bearing shell (19), a first inner ring (20) is mounted in the first mounting hole (193), a first conical retainer (21) is mounted between the first inner ring (20) and the bearing shell (19), and a first roller (22) is mounted on the first retainer (21); a second mounting hole (194) is formed in the bearing shell (19), the second mounting hole (194) is communicated with the first mounting hole (193), a second inner ring (23) is arranged in the second mounting hole (194), a second retainer (24) which is conical in shape is mounted between the second inner ring (23) and the bearing shell (19), and a second roller (25) is mounted on the second retainer (24).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910313545.0A CN110145549B (en) | 2019-04-18 | 2019-04-18 | Monitoring and early warning system for automobile intelligent hub bearing unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910313545.0A CN110145549B (en) | 2019-04-18 | 2019-04-18 | Monitoring and early warning system for automobile intelligent hub bearing unit |
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| CN110145549A CN110145549A (en) | 2019-08-20 |
| CN110145549B true CN110145549B (en) | 2020-11-20 |
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| CN112964468B (en) * | 2021-02-05 | 2023-05-16 | 河钢乐亭钢铁有限公司 | Method and device for monitoring state of horizontal loop wheel bearing of acid rolling production line |
| EP4186774A1 (en) | 2021-11-24 | 2023-05-31 | Tóth, Péter | Wireless bearing monitoring system with mobile measuring device for vehicles, agricultural and industrial machinery |
| CN117249913B (en) * | 2023-11-20 | 2024-02-09 | 江苏金强钢轮有限公司 | Automobile hub bearing temperature monitoring alarm system |
| CN117734347B (en) * | 2024-02-20 | 2024-05-03 | 浙江大铭汽车零部件有限公司 | Hub unit, monitoring method and application thereof |
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| US4355912A (en) * | 1980-09-12 | 1982-10-26 | Haak Raymond L | Spring loaded sensor fitting |
| US5335995A (en) * | 1993-07-16 | 1994-08-09 | Servo Corporation Of America | Resilient support for a railroad wheel heat sensor |
| US5572119A (en) * | 1994-10-28 | 1996-11-05 | Barber-Colman Company | Eddy current position sensor including an insulating base having conductive surfaces for electrically connecting a coil to the lead wires |
| US7018106B2 (en) * | 2001-12-14 | 2006-03-28 | Ntn Corporation | Vehicle mounted bearing assembly |
| ITTO20020108U1 (en) * | 2002-05-24 | 2003-11-24 | Skf Ind Spa | CONTINUOUS MONITORING DEVICE OF THE OPERATING TEMPERATURE OF A BEARING FOR RAILWAY USE. |
| JP3874110B2 (en) * | 2002-08-30 | 2007-01-31 | 日本精工株式会社 | Abnormality diagnosis system |
| WO2006122269A1 (en) * | 2005-05-10 | 2006-11-16 | The Timken Company | Bearing assembly with integrated sensor system |
| JP5455298B2 (en) * | 2007-11-06 | 2014-03-26 | オークマ株式会社 | Bearing condition diagnosis device |
| CN102840245A (en) * | 2012-09-20 | 2012-12-26 | 杭州电子科技大学 | Intelligent wheel hub bearing unit |
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