Bearing retainer and rolling bearing

Abstract

The invention provides a bearing retainer and a rolling bearing, and belongs to the technical field of bearings. The bearing retainer comprises a retainer body, the retainer body comprises two annular rings and lintels connected between the two annular rings, spaces defined by the two adjacent lintels and the annular rings form pockets used for containing rolling bodies, and part or all of the pockets are provided with generatrix direction monitoring units and circumferential tangential monitoring units. During use, data of the distance measuring sensors are combined to obtain translation amount and rotation amount of the rolling body in each monitoring direction. The rolling bearing comprises the bearing retainer. According to the invention, the sensor is integrated on the bearing retainer to monitor the real-time comprehensive motion state of the rolling body, and a basis is provided for prediction of bearing operation faults.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bearings, and particularly relates to a bearing retainer and a rolling bearing. BACKGROUND

[0002] As a core and basic component of rotating machinery, the running state of a rolling bearing directly affects the reliability, safety and service life of the equipment. For bearings used in rotating machinery with extremely high requirements for reliability and predictive maintenance (such as main shaft bearings of aircraft engines, main shaft bearings of wind turbines, high-speed railway bearings, main shaft bearings of precision machine tools, etc.), it is of great significance to monitor the internal working condition of the bearing, especially the dynamic behavior of the rolling elements, in real time and accurately, to realize predictive maintenance, avoid catastrophic failures and optimize equipment performance.

[0003] In recent years, the main way to monitor the dynamic state of the rolling elements is to install sensors on the rolling elements or the retainer to monitor the deformation and load on the rolling elements or the retainer in real time. For example, the Chinese patent application with the application publication number CN119900770A discloses a bearing with a load measuring function. The bearing is provided with a force sensor, a bridge strain gauge and a control module on the contact surface between the retainer and the rollers, which are used to measure the contact load between the rollers and the retainer, the deformation degree of the retainer and transmit the measured data. When the resistance of the bridge strain gauge and the layer sensor changes, the retainer deforms. At this time, the worker can select the data of the force sensor near this time to analyze the deformation reason of the retainer, which is convenient for planning the maintenance work of the bearing and guiding the improvement of the bearing.

[0004] Using the above-mentioned way to monitor the running state of the rolling bearing, it is difficult to accurately know whether the rolling elements have begun to appear or are currently experiencing abnormal motion. Often, the abnormal motion of the rolling elements has already occurred and has collided violently with the retainer before it can be monitored by the strain sensor. At this time, the retainer may have been deformed or broken, which seriously affects the normal work of the bearing. The monitoring result in the prior art lags behind the abnormal running condition of the rolling bearing, which makes it difficult to effectively realize predictive maintenance and avoid catastrophic failures. In addition, due to the lack of more comprehensive monitoring of the motion state of the rolling elements, it is also difficult to objectively analyze the reasons for the deformation and damage of the retainer after it is hit and deformed or damaged. SUMMARY

[0005] The purpose of the present application is to provide a bearing retainer to solve the technical problems of lagging monitoring of the motion state of the rolling elements and insufficient monitoring information in the prior art after being applied to the corresponding rolling bearing.

[0006] Another purpose of the present application is to provide a rolling bearing to solve the above technical problems.

[0007] To achieve the above objectives, the technical solution for the bearing cage provided by this invention is as follows: A bearing cage includes a frame body, which includes two annular rings and a crossbeam connecting the two annular rings. The space enclosed by two adjacent crossbeams and the annular rings forms a pocket for receiving rolling elements. Some or all of the pockets are equipped with a generatrix direction monitoring unit and a circumferential tangential direction monitoring unit. The generatrix direction monitoring unit includes at least two distance sensors arranged on the annular rings, spaced apart in the inner and outer directions of the cage body, for monitoring the distance between itself and the end face of the rolling element along the generatrix direction of the cage body. The circumferential tangential direction monitoring unit includes at least two distance sensors arranged on the crossbeams, spaced apart in the generatrix direction of the cage body, for monitoring the distance between itself and the outer circumferential surface of the rolling element along the circumferential tangential direction of the cage body. In use, the data from each distance sensor is combined to obtain the translation and rotation of the rolling element in each monitoring direction.

[0008] As a further improvement, all distance sensors in the busbar direction monitoring unit are set on the same annular ring, and all distance sensors in the circumferential tangential monitoring unit are set on the same crossbeam.

[0009] As a further improvement, the busbar direction monitoring unit has two ranging sensors, which are respectively set on the inner and outer surfaces of the annular ring and aligned in the inner and outer directions of the frame.

[0010] As a further improvement, the circumferential tangential monitoring unit has two ranging sensors, which are simultaneously installed on the inner or outer surface of the beam.

[0011] As a further improvement, the two distance sensors in the same circumferential tangential monitoring unit are respectively set at the one-quarter and three-quarter positions of the beam.

[0012] As a further improvement, there are at least three pockets equipped with busbar direction monitoring units and circumferential tangential monitoring units, which are evenly distributed along the circumference of the frame.

[0013] As a further improvement, the ranging sensor is an eddy current displacement sensor. When the distance between the eddy current displacement sensor and the rolling element is the calibrated working distance, the output voltage of the eddy current displacement sensor is zero. When the distance between the eddy current displacement sensor and the rolling element is greater than the calibrated working distance, the output voltage of the eddy current displacement sensor increases positively, and vice versa.

[0014] The beneficial effects are as follows: The bearing cage provided by this invention is an improvement over the prior art. This bearing cage integrates sensors for monitoring the distance between itself and the rolling elements. Through a special arrangement of these sensors, they can monitor not only the translational amount of the rolling elements in the monitored direction but also the rotational amount of the rolling elements in the monitored direction. This provides a more comprehensive and real-time view of the rolling elements' motion, reflecting the true operating state inside the rolling bearing. This provides a reliable foundation for predictive maintenance, avoiding catastrophic failures, and optimizing equipment performance, filling a gap in existing technologies for bearing condition monitoring.

[0015] To achieve the above objectives, the technical solution for the rolling bearing provided by this invention is as follows: A rolling bearing includes an inner ring, an outer ring, and rolling elements located between the inner and outer rings. It also includes a bearing cage disposed between the inner and outer rings. The bearing cage includes a frame body, which includes two annular rings and a crossbeam connecting the two annular rings. The space enclosed by two adjacent crossbeams and the annular rings forms pockets for receiving the rolling elements. Some or all of the pockets are equipped with generatrix direction monitoring units and circumferential tangential monitoring units. The generatrix direction monitoring unit includes at least two distance sensors arranged on the annular rings, spaced apart in the inner and outer directions of the frame, for monitoring the distance between itself and the end face of the rolling element along the generatrix direction of the frame. The circumferential tangential monitoring unit includes at least two distance sensors arranged on the crossbeams, spaced apart in the generatrix direction of the frame, for monitoring the distance between itself and the outer circumferential surface of the rolling element along the circumferential tangential direction of the frame. In use, the data from each distance sensor is combined to obtain the translation and rotation of the rolling element in each monitoring direction.

[0016] As a further improvement, all distance sensors in the busbar direction monitoring unit are set on the same annular ring, and all distance sensors in the circumferential tangential monitoring unit are set on the same crossbeam.

[0017] As a further improvement, the busbar direction monitoring unit has two ranging sensors, which are respectively set on the inner and outer surfaces of the annular ring and aligned in the inner and outer directions of the frame.

[0018] As a further improvement, the circumferential tangential monitoring unit has two ranging sensors, which are simultaneously installed on the inner or outer surface of the beam.

[0019] As a further improvement, the two distance sensors in the same circumferential tangential monitoring unit are respectively set at the one-quarter and three-quarter positions of the beam.

[0020] As a further improvement, there are at least three pockets equipped with busbar direction monitoring units and circumferential tangential monitoring units, which are evenly distributed along the circumference of the frame.

[0021] As a further improvement, the ranging sensor is an eddy current displacement sensor. When the distance between the eddy current displacement sensor and the rolling element is the calibrated working distance, the output voltage of the eddy current displacement sensor is zero. When the distance between the eddy current displacement sensor and the rolling element is greater than the calibrated working distance, the output voltage of the eddy current displacement sensor increases positively, and vice versa.

[0022] The beneficial effects are as follows: The rolling bearing provided by this invention is an improvement over the prior art. This rolling bearing integrates sensors on the bearing cage to monitor the distance between itself and the rolling elements. Through a special arrangement of the sensors, these sensors can monitor not only the translational amount of the rolling elements in the monitored direction but also the rotational amount of the rolling elements in the monitored direction. This provides a more comprehensive and real-time view of the rolling elements' motion, reflecting the true operating state inside the rolling bearing. This provides a reliable foundation for predictive maintenance, avoiding catastrophic failures, and optimizing equipment performance, filling the gap in existing technology for bearing condition monitoring. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of Embodiment 1 of the rolling bearing in this invention; Figure 2 This is a partial structural diagram of the rolling bearing in Embodiment 1 of the present invention after removing the outer ring; Figure 3 This is a partial structural diagram of the bearing cage in Embodiment 1 of the rolling bearing of the present invention; Figure 4 This is a schematic diagram of the bearing cage in Embodiment 1 of the rolling bearing of the present invention from the X-direction perspective. Figure 5 This is a schematic diagram of the bearing cage from the Z-direction perspective of Embodiment 1 of the rolling bearing in this invention.

[0024] Explanation of reference numerals in the attached figures: 1. Inner ring; 2. Outer ring; 3. Rolling element; 4. Bearing cage; 41. Annular ring; 42. Transition beam; 43. Pocket; 5. Circuit box; 6. Busbar direction monitoring unit; 7. Circumferential tangential detection unit; a. Distance sensor; b. Distance sensor; c. Distance sensor; d. Distance sensor. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the embodiments.

[0026] Specific embodiment 1 of the rolling bearing provided by the present invention: The rolling bearing is equipped with sensors that can monitor the rolling elements' motion status in real time, so that abnormal movement of the rolling elements can be detected earlier, allowing for timely maintenance measures to be taken.

[0027] See appendix Figure 1 and attached Figure 2 The rolling bearing includes an inner ring 1, an outer ring 2, rolling elements 3, and a bearing cage 4. The rolling elements 3 and the bearing cage 4 are both located between the inner ring 1 and the outer ring 2. The bearing cage 4 is provided with constraint positions for constraining the rolling elements 3, and the rolling elements 3 are correspondingly arranged at the constraint positions.

[0028] In a specific embodiment, the rolling bearing is a tapered roller bearing, wherein the rolling element 3 is an inclined tapered roller. Of course, this solution can also be applied to cylindrical roller bearings, and its application is the same as that of tapered roller bearings.

[0029] The bearing cage 4 includes a frame, which includes two annular rings 41 and a crossbeam 42 integrally connected between the two annular rings 41. The space enclosed by the two adjacent crossbeams 42 and the annular rings 41 forms a pocket 43, which constitutes the aforementioned constraint position. The rolling element 3 is housed in the pocket 43. In use, the four side walls of the pocket 43 can constrain the rolling element 3.

[0030] The rolling element 3 can generally maintain contact with the inner ring 1 and the outer ring 2, and under normal circumstances, they are in rolling fit. However, a certain gap needs to be left between the rolling element 3 and the side wall of the pocket 43 so that it can rotate within the pocket 43. Therefore, during use, the rolling element 3 has a certain margin of translation and rotation in some directions. If the lubrication deteriorates or the fit between the rolling element 3 and the pocket 43 is not good, it may cause the rolling element 3 to exhibit abnormal movement that does not conform to its normal motion law. The abnormal movement of the rolling element 3 increases the risk of collision with the side wall of the pocket 43. If it is not detected and repaired in time, it may damage the bearing cage 4.

[0031] See appendix Figure 3 Appendix Figure 4 and appendix Figure 5A coordinate system is established as shown in the figure, using one of the pockets 43 as a reference. The X-axis is in the same direction as the radial direction of the bearing cage 4 at the pocket 43; the Y-axis is in the same direction as the circumferential tangential direction of the bearing cage 4 at the pocket 43; and the Z-axis is in the same direction as the generatrix direction of the bearing cage 4 at the pocket 43. In this coordinate system, the rolling element 3 has a certain translational margin in both the Y-axis and Z-axis directions. The rolling element 3 also has rotational margins around the Y-axis and X-axis. To monitor the motion of the rolling element 3, its motion in these directions must be monitored. The translational motion of the rolling element 3 in the X-axis direction is very small due to the constraint of the inner ring 1 and outer ring 2, so it is not necessary to specifically measure the translational motion of the rolling element 3 in this direction. The rotation of the rolling element 3 around the Z-axis is its self-rotation. The self-rotation of the rolling element 3 does not directly reflect the periodic displacement of the rolling element 3 in the pocket 43, therefore, it is not specifically monitored in this scheme.

[0032] To achieve the above monitoring objectives, this solution configures distance sensors and their corresponding circuits in some pockets 43 on the surface of the bearing cage 4. The cage is closest to the rolling element 3, and the inner and outer surfaces of the cage have sufficient space to install the distance sensors and corresponding circuits, providing a unique advantage for monitoring the motion state of the rolling element 3. Multiple pockets 43 equipped with distance sensors are evenly distributed along the circumference of the cage. To achieve reliable monitoring of the rolling element 3, at least three pockets 43 with distance sensors are required; in other embodiments, distance sensors can be configured in all pockets 43.

[0033] During installation, the probe of the ranging sensor should face the rolling element 3 and not extend beyond the side wall of the pocket 43 to avoid direct contact between the probe and the rolling element 3. Each ranging sensor is connected to the circuit box 5 through wires. The wires are made of high-temperature resistant ultra-fine wires. The circuit box 5 is equipped with power and signal processing and transmission modules. Each ranging sensor, wire, and circuit box 5 are all glued to the surface of the bearing cage 4 using high-temperature resistant organic adhesive.

[0034] There are four ranging sensors. Two ranging sensors (ranging sensor a and ranging sensor b) form the busbar direction monitoring unit 6, and the other two ranging sensors (ranging sensor c and ranging sensor d) form the circumferential tangential monitoring unit.

[0035] The two distance sensors (distance sensor a and distance sensor b) in the busbar direction monitoring unit 6 are respectively arranged on the inner and outer sides of the same annular ring 41, and are both located at the center of the corresponding side of the pocket 43. The two distance sensors (distance sensor a and distance sensor b) are aligned and spaced apart in the inner and outer directions of the frame. The probes of the two distance sensors (distance sensor a and distance sensor b) are both facing the axial end face of the rolling element 3, and simultaneously monitor the distance between themselves and the axial end face of the rolling element 3.

[0036] When the rolling element 3 only translates in the Z-axis direction, the data measured by the two distance sensors (distance sensor a and distance sensor b) are equal, which can directly reflect the translation of the rolling element 3 in the Z-axis direction. When the rolling element 3 rotates around the Y-axis, the distance between the axial end face of the rolling element 3 and the two distance sensors (distance sensor a and distance sensor b) is different. By combining the data measured by the two distance sensors (distance sensor a and distance sensor b), the amount of rotation of the rolling element 3 around the Y-axis can be obtained.

[0037] Two distance sensors (distance sensor c and distance sensor d) in the circumferential tangential monitoring unit are arranged on the outer surface of the same lintel 42 and spaced apart along the generatrix of the frame. The two distance sensors (distance sensor c and distance sensor d) are located at one-quarter and three-quarters of the way along the lintel 42, respectively. The probes of both distance sensors (distance sensor c and distance sensor d) are oriented tangentially towards the rolling element 3 along the circumference of the frame to monitor the distance between themselves and the outer circumferential surface of the rolling element 3.

[0038] When the rolling element 3 only translates in the Y-axis direction, the data measured by the two distance sensors (distance sensor c and distance sensor d) are equal, which can directly reflect the translation of the rolling element 3 in the Y-axis direction. When the rolling element 3 rotates around the X-axis, the distance between the outer circumference of the rolling element 3 and the two distance sensors (distance sensor c and distance sensor d) is different. By combining the data measured by the two distance sensors (distance sensor c and distance sensor d), the amount of rotation of the rolling element 3 around the X-axis can be obtained.

[0039] By integrating the data obtained from all four ranging sensors in the circumferential tangential monitoring unit and the generatrix direction monitoring unit 6, and combining this with the position information of each ranging sensor, the position and attitude information of the rolling element 3 at each moment can be obtained through computer simulation calculations, thereby realizing the monitoring of the motion state of the rolling element 3. Under normal circumstances, the motion of the rolling element 3 has a periodic pattern. When the motion of the rolling element 3 does not conform to its periodic pattern, the equipment is stopped, and then the machine is disassembled and the rolling bearing is repaired or replaced.

[0040] In this embodiment, the ranging sensor is specifically an eddy current displacement sensor, and the preamplifier of the eddy current displacement sensor is integrated into the circuit box 5. The working principle of the eddy current displacement sensor is as follows: a high-frequency alternating current is passed through the coil inside the sensor probe. When the coil approaches a metal conductor, eddy currents are induced on the surface of the conductor. The induced eddy currents generate a reverse magnetic field, which changes the equivalent impedance (including resistance and inductance) of the probe coil. When the distance (displacement) between the measured object and the probe changes, the intensity and distribution of the eddy currents induced on the surface of the metal conductor change accordingly. The change in the intensity and distribution of the eddy currents directly causes a corresponding change in the impedance of the probe coil. The eddy current displacement sensor internally includes an oscillator, a measurement circuit, and a signal conditioning circuit. The measurement circuit converts the impedance change of the coil into a change in the amplitude or phase of a high-frequency signal. The signal conditioning circuit converts this high-frequency signal change into a low-frequency or DC voltage signal. The magnitude of this output voltage has a specific linear relationship with the distance (displacement) from the probe to the measured metal surface within the effective linear measurement range, that is: a displacement change Δd will cause a proportional linear change ΔV in the output voltage.

[0041] When the eddy current displacement sensor is calibrated at its working distance, the output voltage is zero. During installation, the distance between the roller's measured surface and the probe must be the calibrated working distance of the eddy current displacement sensor. When the roller moves, regardless of whether it moves away from or towards the calibrated working distance, the absolute value of the output voltage will increase. The output voltage of the eddy current displacement sensor selected in this invention increases positively as the roller moves away from the calibrated working distance, and negatively as it moves closer to the calibrated working distance.

[0042] When the rolling element 3 undergoes tangential translation along the frame circumference (i.e., translation along the Y-axis), the output signals from the two probes (probes of distance sensor c and distance sensor d) on the surface of the beam 42 show consistent trends. The voltage values ​​output by the two probes (probes of distance sensor c and distance sensor d) reflect the distance change of the rolling element 3 relative to the probe mounting surface in the corresponding direction. Ensure the probe mounting position is within the calibrated working distance of the eddy current probe; at this point, the preamplifier voltage display is zero. When the rolling element 3 moves away from the probes (probes of distance sensor c and distance sensor d), the output voltage of the eddy current displacement sensor increases positively, and vice versa. Based on the magnitude and sign of the voltage value output by the eddy current displacement sensor preamplifier, the direction and magnitude of the roller's Y-axis displacement can be obtained.

[0043] When the roller translates along the generatrix of the frame, i.e., along the Z-axis, the output signals of the two probes on the annular ring 41 (probes of distance sensor a and distance sensor b) show the same trend. The voltage values ​​output by the two probes (probes of distance sensor a and distance sensor b) reflect the distance change of the roller relative to the probe mounting surface along the generatrix of the frame. Ensure the probe mounting position is within the calibrated working distance of the eddy current probe; at this point, the preamplifier voltage display is zero. When the roller moves away from the probes (probes of distance sensor a and distance sensor b), the output voltage of the eddy current displacement sensor increases positively, and vice versa. Based on the magnitude and sign of the voltage value output by the eddy current displacement sensor preamplifier, the direction and magnitude of the roller's Z-axis displacement can be obtained.

[0044] Regarding the translation of the rolling element 3 along the X-axis, in a rolling bearing, the translation of the rolling element 3 along the X-axis is restricted by the retaining edges of the inner and outer rings 2. The translation of the roller along the X-axis is very small and does not require special measurement.

[0045] When the rolling element 3 rotates around the X-axis inside the pocket 43, the rolling element 3 will move away from the probe of the distance sensor c on the cage 42 and move closer to the probe of the distance sensor d, or move away from the probe of the distance sensor d and move closer to the probe of the distance sensor c. The output voltage values ​​of the two probes (the probe of the distance sensor c and the probe of the distance sensor d) have opposite trends, one increases in the positive direction and the other increases in the negative direction. The rotation state of the roller around the X-axis can be measured based on the magnitude and sign of the voltage output of the preamplifier of the two eddy current displacement sensors on the surface of the cage cage 42.

[0046] When the rolling element 3 rotates around the Y-axis inside the pocket 43, the end face of the rolling element 3 moves away from the probe of the distance sensor a on the ring 41 and moves closer to the probe of the distance sensor b, or moves away from the probe of the distance sensor b and moves closer to the probe of the distance sensor a. The output voltage values ​​of the two probes (the probe of the distance sensor a and the probe of the distance sensor b) have opposite trends, one increases in the positive direction and the other increases in the negative direction. The rotation state of the roller around the Y-axis can be measured according to the magnitude and sign of the voltage output of the preamplifier of the two eddy current displacement sensors on the surface of the ring 41 of the cage.

[0047] Specific embodiment 2 of the rolling bearing provided by the present invention: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that there are three distance sensors in the circumferential tangential monitoring unit. All three distance sensors are installed on the outer surface of the same beam. The three distance sensors are located at one-quarter, two-quarters and three-quarters of the beam, respectively.

[0048] In other embodiments of this implementation, the middle of the three ranging sensors is mounted at two-quarters of the inner surface of the beam.

[0049] In other embodiments of this implementation, two of the three ranging sensors are disposed on the outer surface of the same beam, located at one-quarter and three-quarters of the beam, respectively, and the other is disposed at two-quarters of the outer surface of another beam.

[0050] Specific embodiment 3 of the rolling bearing provided by the present invention: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that in this embodiment, both distance sensors in the circumferential tangential monitoring unit are embedded in the beam.

[0051] Specific embodiment 4 of the rolling bearing provided by the present invention: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that the busbar direction monitoring unit in this embodiment has three ranging sensors, two of which are located on the outer side of the ring and one is located on the inner side of the ring. The three ranging sensors are arranged in an isosceles triangle.

[0052] In other embodiments of this implementation, two of the three ranging sensors in the bus direction monitoring unit may be arranged on the inner side of the annular ring and one on the outer side of the annular ring.

[0053] In other embodiments of this implementation, two of the three ranging sensors in the bus direction monitoring unit may be arranged on the outer side of one annular ring, and one may be arranged on the inner side of the other annular ring.

[0054] Specific embodiment 5 of the rolling bearing provided by the present invention: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that the ranging sensor in this embodiment is a laser ranging sensor. The laser ranging sensor measures distance by laser and needs to ensure that the position is open and unobstructed. It is suitable for rolling bearings with a small amount of lubricating grease.

[0055] Specific embodiments of the bearing cage provided by the present invention: The bearing cage is the same as the bearing cage in the above-described embodiment of the rolling bearing, and will not be described again.

[0056] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bearing cage, comprising a frame body, the frame body including two annular rings and a crossbeam connecting the two annular rings, wherein the space enclosed by two adjacent crossbeams and the annular rings forms a pocket for receiving rolling elements, characterized in that... Some or all of the pockets are equipped with a busbar direction monitoring unit and a circumferential tangential monitoring unit. The busbar direction monitoring unit includes at least two distance sensors arranged on the annular ring, spaced apart in the direction inside and outside the frame, for monitoring the distance between itself and the end face of the rolling element along the busbar direction of the frame. The circumferential tangential monitoring unit includes at least two distance sensors arranged on the crossbeam, spaced apart in the direction of the busbar of the frame, for monitoring the distance between itself and the outer circumferential surface of the rolling element along the circumferential tangential direction of the frame. In use, the data from each distance sensor are combined to obtain the translation and rotation of the rolling element in each monitoring direction.

2. The bearing cage according to claim 1, characterized in that, All distance sensors in the busbar direction monitoring unit are mounted on the same annular ring, and all distance sensors in the circumferential tangential monitoring unit are mounted on the same crossbeam.

3. The bearing cage according to claim 2, characterized in that, The busbar direction monitoring unit has two distance sensors, which are respectively set on the inner and outer surfaces of the annular ring and aligned in the inner and outer directions of the frame.

4. The bearing cage according to claim 2, characterized in that, The circumferential tangential monitoring unit has two ranging sensors, which are simultaneously installed on the inner or outer surface of the beam.

5. The bearing cage according to claim 4, characterized in that, Two ranging sensors in the same circumferential tangential monitoring unit are set at one-quarter and three-quarters positions of the beam, respectively.

6. The bearing cage according to any one of claims 1-5, characterized in that, There are at least three pockets equipped with busbar direction monitoring units and circumferential tangential monitoring units, which are evenly distributed along the circumference of the frame.

7. The bearing cage according to any one of claims 1-3, characterized in that, The ranging sensor is an eddy current displacement sensor. When the distance between the eddy current displacement sensor and the rolling element is the calibrated working distance, the output voltage of the eddy current displacement sensor is zero. When the distance between the eddy current displacement sensor and the rolling element is greater than the calibrated working distance, the output voltage of the eddy current displacement sensor increases positively, and vice versa.

8. A rolling bearing comprising an inner ring, an outer ring, and rolling elements located between the inner ring and the outer ring, characterized in that, It also includes the bearing cage as described in any one of claims 1-7, disposed between the inner and outer rings.

Images