Main bearing raceway damage monitoring system and heading machine adopting same

Abstract

The invention discloses a main bearing raceway damage monitoring system and a heading machine adopting the same, and the system is characterized in that a main push acquisition end is fixedly mounted on a main push retainer, and a radial acquisition end is fixedly mounted on a radial retainer, so that the distance from an induction surface of the acquisition end to a raceway is monitored; and the damage condition of the main bearing raceway can be intuitively judged through the change of the distance, so that the damage conditions of the main thrust raceway and the radial raceway can be accurately monitored. Moreover, a main push fixing end is installed on the first outer ring, a radial fixing end is installed on the second outer ring, so that wireless charging and wireless data receiving are provided for a main push acquisition end and a radial acquisition end respectively, and the acquisition ends are completely integrated in the retainer, so that a new installation space is not occupied, and the cost is reduced. And data collection and charging of the acquisition end are carried out by adopting wireless communication and wireless power supply modes, so that a communication cable and a power supply cable are omitted, and the limitation of the internal mounting space of the main bearing is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of main bearing monitoring, and in particular, to a main bearing raceway damage monitoring system. In addition, the present invention also particularly relates to a tunnel boring machine using the main bearing raceway damage monitoring system. Background Art

[0002] The main bearing is a key component of a large-scale tunnel boring machine. During the tunneling process, once the main bearing fails, it will cause immeasurable losses. Due to the harsh conditions of tunneling and the importance of the main bearing, it is necessary to monitor the wear, pitting, peeling and other raceway damage in real time to ensure the safe operation of the equipment. For example, patent CN115524123A discloses a method for monitoring the operating status of the main bearing of a tunnel boring machine, which monitors the operating status of each sub-component of the main bearing based on vibration data and sub-component failure frequency. However, due to the extremely harsh working conditions of the tunnel boring machine, it is difficult to accurately obtain effective fault information from the monitoring data under harsh working conditions, and it is difficult to achieve accurate raceway damage monitoring. In addition, due to the limited installation space inside the main bearing, it is difficult to install various types of sensors to monitor it, and the main bearing requires high sealing inside, which brings great difficulties to the data transmission and power supply of the sensor. Summary of the invention

[0003] The present invention provides a main bearing raceway damage monitoring system and a tunnel boring machine using the same, which can intuitively judge the damage condition of the main bearing raceway by the change of distance, and does not occupy new installation space, saves communication cables and power supply cables, and effectively avoids the limitation of the internal installation space of the main bearing.

[0004] According to one aspect of the present invention, a main bearing raceway damage monitoring system is provided, comprising a main push collecting end, a main push fixed end, a radial collecting end, a radial fixed end and a receiving terminal, wherein the main push collecting end is fixedly mounted on the main push retaining frame, and is used to collect the distance from the main push roller to the upper raceway and the lower raceway of the main push roller, the main push fixed end is fixedly mounted on the first outer ring, and is used to receive the collected data of the main push collecting end by wireless communication and provide wireless power for it, the radial collecting end is fixedly mounted on the radial retaining frame, and is used to collect the distance from the radial upper raceway and the radial lower raceway, the radial fixed end is fixedly mounted on the second outer ring, and is used to receive the collected data of the radial collecting end by wireless communication and provide wireless power for it, the main push fixed end and the radial fixed end are both connected to the receiving terminal via a cable, and the receiving terminal is used to perform raceway damage monitoring according to the collected data of the main push collecting end and the radial collecting end, and provide electrical energy to the main push fixed end and the radial fixed end.

[0005] Furthermore, the main push acquisition end includes a data processing module and at least one displacement sensor module, at least one displacement sensor module is fixedly mounted on a rib plate in the middle position of the main push retaining frame, and the main push roller arranged in the pocket hole next to the rib plate and close to the main push fixed end is removed, and the data processing module is fixedly mounted at the position of the removed main push roller, and a baffle is arranged in the middle of the pocket hole for limiting the remaining main push roller in the pocket hole, and the data processing module is connected to the displacement sensor module via a cable.

[0006] Furthermore, the number of the displacement sensor modules is four, and every two displacement sensor modules are symmetrically installed on both sides of the central axis of a main push roller.

[0007] Furthermore, each displacement sensor module includes two displacement sensors installed opposite to each other, which are used to simultaneously measure the distance to the upper raceway of the main push roller and the distance to the lower raceway of the main push roller.

[0008] Furthermore, the sampling frequency of the displacement sensor module is determined according to the main bearing diameter, rotation speed and minimum size requirement for target fault identification, and the calculation formula is:

[0009]

[0010] Among them, F s represents the sampling frequency of the displacement sensor, n represents the rotation speed of the main bearing, Φ represents the diameter of the main bearing, and s represents the sampling point interval determined according to the minimum size recognition requirement.

[0011] Furthermore, the data processing module includes a battery module, a wireless energy receiving module, a wireless communication sending module and a microprocessor installed in an oil protection casing, the battery module is electrically connected to the wireless energy receiving module, the wireless communication sending module, the microprocessor and the displacement sensor module, respectively, and the microprocessor is also electrically connected to the displacement sensor module and the wireless communication sending module, respectively.

[0012] Furthermore, the main push collecting end and the radial collecting end both include RFID tags, and the main push fixed end and the radial fixed end both include RFID readers. When the collecting end moves into the detection range of the RFID reader, the RFID reader reads the tag signal strength to identify the location information of the RFID tag. Before the equipment is ready to shut down, the rotation speed of the main bearing is adjusted according to the location information identified by the RFID reader, so that the collecting end stops within the coverage range of wireless charging when the equipment is completely stationary.

[0013] Furthermore, the main push fixed end includes a wireless energy sending module and a wireless communication receiving module, the wireless communication receiving module performs wireless communication with the wireless communication sending module, and the wireless energy sending module provides wireless charging for the wireless energy receiving module.

[0014] Furthermore, the installation distance between the displacement sensor and the raceway surface is (a, bc), wherein a represents the lower limit of the detection range of the displacement sensor, b represents the upper limit of the detection range of the displacement sensor, and c represents the maximum size of the pit on the raceway surface.

[0015] In addition, the present invention also provides a tunneling machine, which adopts the main bearing raceway damage monitoring system as described above.

[0016] The present invention has the following beneficial effects:

[0017] The main bearing raceway damage monitoring system of the present invention monitors the distance from the sensing surface of the collection end to the upper raceway of the main push roller, the lower raceway of the main push roller, the radial upper raceway and the radial lower raceway by fixing the main push collection end on the main push retainer and fixing the radial collection end on the radial retainer. The damage of the main bearing raceway can be intuitively judged by the change of the distance. There is no need to perform complex processing and analysis on the data, and the damage analysis results can be directly output, so that the damage of the main push raceway and the radial raceway can be accurately monitored. In addition, the main push fixed end is installed on the first outer ring and the radial fixed end is installed on the second outer ring to provide wireless charging and wireless data reception for the main push collection end and the radial collection end respectively. Since the collection end is completely integrated inside the retainer, it does not occupy new installation space, and wireless communication and wireless power supply are used to collect data and charge the collection end, eliminating communication cables and power supply cables, effectively avoiding the limitation of the internal installation space of the main bearing.

[0018] In addition, the tunnel boring machine of the present invention also has the above advantages.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It is a schematic diagram of the structural layout of the main bearing raceway damage monitoring system of the preferred embodiment of the present application.

[0022] Figure 2It is a schematic diagram of the installation structure of the main push collection end of the preferred embodiment of the present application.

[0023] Figure 3 It is a schematic diagram of the installation structure of the main push collection end and the radial collection end of the preferred embodiment of the present application.

[0024] Figure 4 It is a schematic diagram of the measurement response of the inner ring main push raceway of the cage in two different postures when only a single sensor is installed in the preferred embodiment of the present application.

[0025] Figure 5 It is a schematic diagram of the measurement response of the outer ring main push raceway of the cage in two different postures when only a single sensor is installed in the preferred embodiment of the present application.

[0026] Figure 6 It is a schematic diagram of the measurement response of the outer ring main push raceway of the cage in two different postures when two sensors are installed oppositely in the preferred embodiment of the present application.

[0027] Figure 7 It is a schematic diagram of the principles of wireless communication and wireless power supply in the preferred embodiment of the present application.

[0028] Description of Reference Numerals

[0029] 1. Main pusher retainer; 2. Main pusher roller upper raceway; 3. Main pusher roller lower raceway; 4. First outer ring; 5. Radial retainer; 6. Radial upper raceway; 7. Radial lower raceway; 8. Second outer ring; 9. Main pusher roller; 10. Radial roller; 101. Displacement sensor module; 102. Data processing module; 103. Oil protection housing; 104. Battery module; 105. Wireless energy receiving module; 106. Wireless communication sending module; 107. Microprocessor; 108. Wireless energy sending module; 109. Wireless communication receiving module; 110. Cable groove; 111. Screw; 101a. First displacement sensor module; 101b. Second displacement sensor module; 101c. Third displacement sensor module; 101d. Fourth displacement sensor module. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] Reference Figure 1 , Figure 2 and Figure 3As shown, the preferred embodiment of the present application provides a main bearing raceway damage monitoring system, which includes a main push collection end, a main push fixed end, a radial collection end, a radial fixed end and a receiving terminal, wherein the main push collection end is fixedly mounted on the main push retainer 1, and is used to collect the distance from the main push roller upper raceway 2 and the main push roller lower raceway 3, so as to monitor the damage of the main push roller upper raceway 2 and the main push roller lower raceway 3, wherein the main push fixed end is fixedly mounted on the first outer ring 4, specifically mounted in the groove of the first outer ring 4, and is used to receive the collection data of the main push collection end by wireless communication and provide wireless power for it. The radial collection end is fixedly mounted on the radial retainer 5, and is used to collect the distance from the radial upper raceway 6 and the radial lower raceway 7, so as to monitor the damage of the radial upper raceway 6 and the radial lower raceway 7, wherein the radial fixed end is fixedly mounted on the second outer ring 8, specifically mounted in the groove of the second outer ring 8, and is used to receive the collection data of the radial collection end by wireless communication and provide wireless power for it. The main push fixed end and the radial fixed end are both connected to the receiving terminal through cables. The receiving terminal is used to monitor raceway damage based on the collected data of the main push collecting end and the radial collecting end, and provide power to the main push fixed end and the radial fixed end.

[0032] It can be understood that the main bearing raceway damage monitoring system of this embodiment monitors the distance from the sensing surface of the collection end to the upper raceway 2 of the main push roller, the lower raceway 3 of the main push roller, the upper radial raceway 6 and the lower radial raceway 7 by fixing the main push collection end on the main push retainer 1 and fixing the radial collection end on the radial retainer 5. The damage of the main bearing raceway can be intuitively judged by the change of the distance, and the damage analysis result can be directly output without complex data processing and analysis, so that the damage of the main push raceway and the radial raceway can be accurately monitored. In addition, the main push fixed end is installed on the first outer ring 4 and the radial fixed end is installed on the second outer ring 8, respectively, to provide wireless charging and wireless data reception for the main push collection end and the radial collection end. Since the collection end is completely integrated inside the retainer, it does not occupy new installation space, and wireless communication and wireless power supply are used to collect data and charge the collection end, eliminating communication cables and power supply cables, effectively avoiding the limitation of the installation space inside the main bearing.

[0033] Specifically, the main push acquisition end includes a data processing module 102 and at least one displacement sensor module 101. At least one displacement sensor module 101 is fixedly mounted on the rib plate in the middle position of the main push holder 1, which can reduce the impact of the holder on the sensor to improve the detection accuracy. There are two rows of main push rollers 9 on the main push holder 1. The main push rollers 9 arranged in the pockets next to the middle rib plate and close to the main push fixed end are removed. The data processing module 102 is fixedly mounted at the position where the removed main push rollers 9 are located. A baffle is arranged in the middle of the pockets to limit the remaining main push rollers 9 in the pockets. The data processing module 102 is connected to the displacement sensor module 101 through a cable. Among them, a cable groove 110 is opened between the middle rib plate and the installation position of the data processing module 102, which is used to place the wires for powering the displacement sensor module 101 and transmitting data. The cable groove 110 is coated with oil-proof material, such as epoxy resin, to protect the wires from being impregnated with oil.

[0034] Optionally, the number of the displacement sensor modules 101 is four, and every two displacement sensor modules 101 are symmetrically installed on both sides of the central axis of a main push roller 9. For example, the main push acquisition end includes a first displacement sensor module 101a, a second displacement sensor module 101b, a third displacement sensor module 101c, and a fourth displacement sensor module 101d, wherein the first displacement sensor module 101a and the second displacement sensor module 101b are symmetrically installed on both sides of the central axis of one main push roller 9, and the third displacement sensor module 101c and the fourth displacement sensor module 101d are symmetrically installed on both sides of the central axis of another main push roller 9. Of course, in other embodiments of the present invention, the number of displacement sensor modules 101 can be one, two, three or even more, for example, a displacement sensor module 101 is set at the central axis position of the main push roller 9.

[0035] It can be understood that, considering that during the operation of the main bearing, the bearing capacity is the largest at the center axis of the main push roller 9, resulting in the maximum wear on the main push raceway at the position corresponding to the center axis of the main push roller 9. Therefore, by symmetrically installing a pair of displacement sensor modules 101 on both sides of the center axis of the main push roller 9, the detection accuracy, detection range and detection probability of raceway damage can be improved.

[0036] Preferably, each displacement sensor module 101 includes two displacement sensors installed opposite to each other, which are used to simultaneously measure the distance to the upper raceway 2 of the main push roller and the distance to the lower raceway 3 of the main push roller. The displacement sensor can be of inductive, eddy current, capacitive, Hall type, etc., preferably eddy current. In addition, the surface of the displacement sensor is covered with oil-proof polytetrafluoroethylene for protection.

[0037] It can be understood that when the main push cage 1 completely falls on the main push raceway surface of the inner ring, there is a gap between it and the main push raceway surface of the outer ring. Due to the existence of this gap, when the main bearing is running, the running posture of the main push cage 1 will change between the relative raceways. The two displacement sensors installed opposite to each other not only realize the monitoring of the upper and lower raceways of the main push, but also eliminate the influence of the displacement caused by the shaking during the rotation of the main push cage 1 on the displacement sensor measurement, thereby improving the accuracy of raceway damage detection. For example, two sensors S1 and S2 are installed oppositely on the upper and lower sides of the main push roller, and their distances to the upper roller 2 and the lower roller 3 of the main push roller are d1 and d2 respectively. The displacement caused by the disturbance is δ, then d1′=d1+δ, d2′=d2-δ, and the total distance D=d′1+d2′=d1+d2. It can be seen that in the case of symmetrical installation, the total distance D is only determined by the original distances d1 and d2 from the two displacement sensors to the roller surface, and has nothing to do with the displacement δ caused by the disturbance. Therefore, by calculating the sum of the measured values ​​of the two oppositely installed displacement sensors, the influence of the disturbance can be eliminated. In addition, the inventors of the present application have also conducted experimental verification, and the verification results are as follows: Figures 4 to 6 As shown, Figure 4 It shows the measured response of the inner ring push raceway of the cage in two different postures when only a single sensor is installed. Figure 5 It shows the measured response of the outer ring main thrust raceway of the cage in two different postures when only a single sensor is installed. Figure 6 This is the measurement response of the outer ring main push raceway of the cage in two different postures when two sensors are installed oppositely. The verification results show that the fluctuation degree of the measurement response of a single sensor to the raceway surface will not be at the same level due to the change of the cage's running posture. When two sensors are installed oppositely at the same position, the relative raceway surfaces are measured simultaneously. Since the sum of the distances between the sensing surfaces of the two sensors and their respective measured raceway surfaces is always a constant value, without considering which specific raceway surface is damaged, the change of the cage's running posture is eliminated by the "one increases and the other decreases" offset method, so that no matter how the cage's posture changes, the measurement data always fluctuates at the same level. Therefore, by installing two sensors oppositely at the same position, the influence of the change of the cage's running posture on the measurement results of the displacement sensor can be eliminated.

[0038] It can be understood that the damage of the raceway surface usually manifests as wear, pits or cracks. These damages will cause the shape of the raceway surface to change, thereby causing changes in the displacement sensor measurement value. Therefore, by analyzing these displacement changes, the degree of damage to the raceway surface can be evaluated. Taking the eddy current displacement sensor as an example, the eddy current displacement sensor uses the principle of electromagnetic induction to measure the displacement by detecting the eddy current changes caused by the displacement change on the surface of the conductive material. The excitation coil generates an alternating magnetic field, which induces eddy currents on the surface of the conductive material to form a reverse magnetic field, affecting the magnetic field of the excitation coil. The detection coil senses the change in the total magnetic field. When the position of the conductive material changes, the eddy current intensity and distribution change, resulting in changes in the induced electromotive force in the detection coil. By detecting the change in electromotive force, the sensor calculates the displacement change. The output signal is usually a voltage signal proportional to the displacement, making the displacement calculation simple. Assume that the raceway surface is an ideal smooth plane in an undamaged state. Assume that the initial position measurement value of the displacement sensor at a certain point is d0, and the displacement change caused by the damage to the raceway surface is Δd, then the actual measured displacement d is: d=d0+Δd.

[0039] It can be understood that the setting of the displacement sensor sampling frequency theoretically determines the minimum size of the damage fault that can be identified, which can improve the accuracy of damage monitoring. Therefore, the sampling frequency of the displacement sensor module 101 in the present invention is determined according to the main bearing diameter, rotation speed and the minimum size requirement for target fault identification, and the calculation formula is:

[0040]

[0041] Among them, F s represents the sampling frequency of the displacement sensor, n represents the rotation speed of the main bearing, Φ represents the diameter of the main bearing, and s represents the sampling point interval determined according to the minimum size recognition requirement. For example, taking a main bearing with a diameter of 7.6m running at a rotation speed of 2.5rpm as an example, it is required to be able to recognize the minimum diameter of 3mm spalling / pits. In order to recognize the basic shape of spalling / pits, the sampling point interval is set to 0.5mm, then s=0.5mm,

[0042] Therefore, the sampling frequency is set to 1000 Hz.

[0043] Optionally, the installation distance of the displacement sensor from the raceway surface is (a, bc), where a represents the lower limit of the detection range of the displacement sensor, b represents the upper limit of the detection range of the displacement sensor, and c represents the maximum size of the pit on the raceway surface. For example, the detection range of the displacement sensor is usually between 1mm and 5mm. Exceeding the range will make the sensor reading infinitely large or infinitely small, so the minimum installation distance of the sensor is d>1mm, and the maximum pit is generally 3mm. Then the distance d+3 between the sensor and the raceway should be within the detection range, then d+3<5. Therefore, the installation distance of the displacement sensor from the raceway surface should be between 1mm and 2mm to ensure the accuracy of the detection structure.

[0044] The data processing module 102 includes a battery module 104, a wireless energy receiving module 105, a wireless communication sending module 106 and a microprocessor 107 installed in an oil protection housing 103. The oil protection housing 103 is fixedly installed on the holder and is specifically connected to the main push holder 1 through four screws 111. The battery module 104, the wireless energy receiving module 105, the wireless communication sending module 106 and the microprocessor 107 are integrated on a PCB board. The battery module 104 is electrically connected to the wireless energy receiving module 105, the wireless communication sending module 106, the microprocessor 107 and the displacement sensor module 101 respectively. The microprocessor 107 is also electrically connected to the displacement sensor module 101 and the wireless communication sending module 106 respectively. The main push fixed end includes a wireless energy sending module 108 and a wireless communication receiving module 109. The wireless communication receiving module 109 performs wireless communication with the wireless communication sending module 106, and the wireless energy sending module 108 provides wireless charging for the wireless energy receiving module 105. Among them, the microprocessor 107 preferably selects a low-power, high-performance chip to mark and store the data collected by the sensor. After acquiring the data, the microprocessor 107 first integrates the data to eliminate the influence of the shaking of the cage on the data, and then performs filtering analysis to eliminate noise and mutations. Then, the displacement change is identified by differential analysis, and whether the displacement change exceeds the standard is determined according to the threshold set in advance, and the pit is preliminarily identified. Finally, the identification results are statistically analyzed to confirm the position and size of the pit. In addition, the wireless communication sending module 106 and the wireless communication receiving module 109 preferably use a wireless module of Biggee communication technology, which is small in size and low in power consumption, and is suitable for short-distance wireless transmission. Of course, in other embodiments of the present invention, other existing wireless communication modules can also be used, such as Bluetooth, zigbee, etc. When the device is shut down, the wireless energy sending module 108 transmits energy to the wireless energy receiving module 105 at the collection end through magnetic resonance, and finally the energy is stored in the battery module 104. At the same time, the wireless communication sending module 106 wirelessly transmits the collected data to the wireless communication receiving module 109 at the main fixed end, and the wireless communication receiving module 109 transmits it to the receiving terminal via a network cable.

[0045] It can be understood that the entire main push collection end is integrated into the interior of the main push retaining frame 1, and the four displacement sensor modules 101 are fixed on the rib plate of the main push retaining frame 1. As the main push retaining frame 1 rotates, the upper and lower surfaces of the entire main push raceway within the detection range of the sensor are scanned. The collected data is transmitted to the microprocessor 107 through wires for storage and analysis. When the equipment is shut down, it is transmitted to the wireless communication receiving module 109 of the main push fixed end through the wireless communication sending module 106. At the same time, the wireless energy sending module 108 of the main push fixed end provides wireless charging for the wireless energy receiving module 105.

[0046] It can be understood that the structure of the radial collection end is basically the same as that of the main push collection end, the only difference is that the radial raceway has only one row of radial rollers 10, so only two displacement sensor modules 101 need to be installed on the radial retainer 5 to realize the damage monitoring of the radial upper raceway 6 and the radial lower raceway 7. In addition, the structure of the radial fixed end is the same as that of the main push fixed end.

[0047] It is understandable that Figure 7 As shown, the receiving terminal provides power supply for the wireless energy sending module 108 of the main push fixed end and the radial fixed end. When the equipment is shut down, the wireless communication sending module 106 of the main push collection end and the radial collection end transmits the collected data to the wireless communication receiving module 109 of the main push fixed end and the radial fixed end. The wireless communication receiving module 109 then transmits the collected output to the receiving terminal through a cable. In addition, the wireless energy sending module 108 of the main push fixed end and the radial fixed end can also provide wireless charging for the wireless energy receiving module 105 of the main push collection end and the radial collection end, and the charging energy is stored in the battery module 104.

[0048] Optionally, the main push collection end and the radial collection end both include RFID tags, which are specifically installed on the wireless energy receiving module 105. The main push fixed end and the radial fixed end both include RFID readers. When the collection end moves into the detection range of the RFID reader, the RFID reader reads the tag signal strength to identify the location information of the RFID tag. Before the equipment is ready to shut down, the rotation speed of the main bearing is adjusted according to the location information identified by the RFID reader, so that the collection end stops within the coverage range of wireless charging when the equipment is completely stationary.

[0049] It can be understood that when the equipment is shut down, the acquisition end needs to stay near the fixed end to facilitate wireless charging, and the coverage range of wireless charging is generally between tens of centimeters and 1 meter. Therefore, in order to ensure the reliability of wireless charging, it is necessary to control the position of the acquisition end when the equipment is shut down. Therefore, the present invention sets an RFID tag at the acquisition end and an RFID reader at the fixed end. Before the equipment is ready to shut down, the tunnel boring machine control program controls the main bearing speed according to the position information provided by the RFID reader, so that the acquisition end can stay within the coverage range of the wireless energy transmission module 108 when the equipment is completely stationary, ensuring that wireless charging is reliable. In the prior art, the rotation angle of the main shaft is generally detected by an angle encoder or an angle sensor, so as to feedback and adjust the main bearing speed to accurately control the stop position of the acquisition end, but there is no space on the main shaft to install the angle encoder or angle sensor. If the angle encoder or angle sensor is installed on the retaining frame, the retaining frame will continuously collide during the operation of the main bearing, resulting in the angle encoder or angle sensor being unable to accurately detect the rotation angle, thereby being unable to accurately control the stop position of the acquisition end, and thus being unable to ensure the reliability of wireless charging.

[0050] It can be understood that when the main bearing rotates, the retaining frame moves circumferentially, and the displacement sensor rotates with the retaining frame to perform 360° detection of the raceway surface within its detection range. The detected data is transmitted to the microprocessor 107 for storage and analysis, thereby realizing damage monitoring. When the equipment is shut down, the fixed end begins to transmit energy to the acquisition end infinitely in the form of magnetic resonance, and the energy is stored in the battery module 104. In addition, the data and analysis results in the microprocessor 107 are transmitted to the fixed end through the wireless communication transmission module 106, and the fixed end transmits the data to the receiving terminal through the network cable. The receiving terminal receives the data and analysis results sent by the main push fixed end and the radial fixed end, and at the same time serves as a power source to supply power to the wireless energy transmission module 108 of the main push fixed end and the radial fixed end. The entire system can set the collection time interval and collection time according to actual needs. For example, in the early stage of the main bearing operation, sampling is performed every 3 days, and each sampling time can cover the duration of 4 rotations of the main bearing (2 rotations of the cage). If the main bearing speed is 1rpm, then each sampling time is at least greater than 4 minutes; in the later stage of the main bearing operation, the sampling frequency can be increased, such as sampling once every 1 day.

[0051] In addition, another embodiment of the present invention further provides a roadheader, which preferably adopts the main bearing raceway damage monitoring system as described above.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A main bearing raceway damage monitoring system, characterized in that: The invention comprises a main push collecting end, a main push fixed end, a radial collecting end, a radial fixed end and a receiving terminal. The main push collecting end is fixedly mounted on a main push retaining frame (1) and is used to collect the distance from the main push roller to the upper raceway (2) and the main push roller to the lower raceway (3). The main push fixed end is fixedly mounted on a first outer ring (4) and is used to receive the collected data of the main push collecting end by wireless communication and provide wireless power for the main push collecting end. The radial collecting end is fixedly mounted on a radial retaining frame (5) and is used to collect the distance from the radial upper raceway (6) and the radial lower raceway (7). The radial fixed end is fixedly mounted on a second outer ring (8) and is used to receive the collected data of the radial collecting end by wireless communication and provide wireless power for the main push collecting end and the radial fixed end. Both the main push fixed end and the radial fixed end are connected to the receiving terminal via a cable. The receiving terminal is used to monitor raceway damage according to the collected data of the main push collecting end and the radial collecting end, and provide electric energy to the main push fixed end and the radial fixed end.

2. The main bearing raceway damage monitoring system according to claim 1, characterized in that: The main push acquisition end comprises a data processing module (102) and at least one displacement sensor module (101), wherein the at least one displacement sensor module (101) is fixedly mounted on a rib plate in the middle of the main push retaining frame (1), and a main push roller (9) arranged in a pocket hole next to the rib plate and close to the main push fixed end is removed, and the data processing module (102) is fixedly mounted at the location of the removed main push roller (9), and a baffle is arranged in the middle of the pocket hole for limiting the main push roller (9) remaining in the pocket hole, and the data processing module (102) is connected to the displacement sensor module (101) via a cable.

3. The main bearing raceway damage monitoring system according to claim 2, characterized in that: The number of the displacement sensor modules (101) is four, and every two displacement sensor modules (101) are symmetrically mounted on both sides of the central axis of a main push roller (9).

4. The main bearing raceway damage monitoring system according to claim 2, characterized in that: Each displacement sensor module (101) comprises two displacement sensors installed opposite to each other, and is used to simultaneously measure the distance to the upper raceway (2) of the main push roller and to the lower raceway (3) of the main push roller.

5. The main bearing raceway damage monitoring system according to claim 2, characterized in that: The sampling frequency of the displacement sensor module (101) is determined according to the main bearing diameter, rotation speed and target fault identification minimum size requirement, and the calculation formula is: Among them, F s represents the sampling frequency of the displacement sensor, n represents the rotation speed of the main bearing, Φ represents the diameter of the main bearing, and s represents the sampling point interval determined according to the minimum size recognition requirement.

6. The main bearing raceway damage monitoring system according to claim 2, characterized in that: The data processing module (102) comprises a battery module (104), a wireless energy receiving module (105), a wireless communication sending module (106) and a microprocessor (107) installed in an oil protection housing (103); the battery module (104) is electrically connected to the wireless energy receiving module (105), the wireless communication sending module (106), the microprocessor (107) and the displacement sensor module (101), respectively; and the microprocessor (107) is also electrically connected to the displacement sensor module (101) and the wireless communication sending module (106), respectively.

7. The main bearing raceway damage monitoring system according to claim 1, characterized in that: The main push collecting end and the radial collecting end both include RFID tags, and the main push fixed end and the radial fixed end both include RFID readers. When the collecting end moves into the detection range of the RFID reader, the RFID reader reads the tag signal strength to identify the location information of the RFID tag. Before the equipment is ready to shut down, the rotation speed of the main bearing is adjusted according to the location information identified by the RFID reader, so that the collecting end stops within the coverage range of wireless charging when the equipment is completely stationary.

8. The main bearing raceway damage monitoring system according to claim 6, characterized in that: The main push fixed end comprises a wireless energy transmission module (108) and a wireless communication receiving module (109), wherein the wireless communication receiving module (109) performs wireless communication with the wireless communication transmission module (106), and the wireless energy transmission module (108) provides wireless charging for the wireless energy receiving module (105).

9. The main bearing raceway damage monitoring system according to claim 4, characterized in that: The installation distance between the displacement sensor and the raceway surface is (a, bc), where a represents the lower limit of the detection range of the displacement sensor, b represents the upper limit of the detection range of the displacement sensor, and c represents the maximum size of the pit on the raceway surface.

10. A tunnel boring machine, characterized in that: A main bearing raceway damage monitoring system as described in any one of claims 1 to 9 is used.

Images