Method and device for rapidly and efficiently detecting dynamic angle of bearing retainer

Abstract

The invention belongs to the field of bearing testing, and particularly relates to a method and a device for quickly and efficiently detecting the dynamic angle of a bearing retainer. In order to conveniently detect dynamic inclination angles and skew angles of various types of bearing retainers, the invention provides a method for rapidly and efficiently detecting the dynamic angle of a bearing retainer. The method comprises the following steps of: measuring at least three measuring points on a to-be-measured end surface on one axial side of the retainer through an axial displacement sensor; all the axial displacement sensors are located on the same plane perpendicular to the axis of the initial state of the retainer, all the measuring points are not located on the same straight line, the inclination angle and the skew angle of the end face to be measured are calculated according to the distance measured by the axial displacement sensors, and the inclination angle and the skew angle of the end face to be measured are used for representing the inclination angle and the skew angle of the retainer. The invention further provides a corresponding device for rapidly and efficiently detecting the dynamic angle of the bearing retainer. The inclination angle and the skew angle of the holder are represented by the inclination angle and the skew angle of the to-be-measured end face, no radial displacement sensor is arranged, and the method is suitable for all bearings.

Description

Technical Field

[0001] The present invention belongs to the field of bearing testing, and particularly relates to a method and device for quickly and efficiently detecting the dynamic angle of a bearing cage. Background Art

[0002] During operation, the bearing cage may tilt or skew due to various reasons. Such small angular changes will affect the running stability of the bearing, and then cause abnormal vibration of the main equipment, deteriorate the performance of the main equipment. Detecting the angle during the operation of the bearing cage is beneficial to evaluating the running stability of the bearing. When analyzing the performance and reliability of a bearing, it is necessary to detect the tilt angle and skew angle of the bearing cage during operation. During the normal operation of the bearing, the tilt angle and skew angle of the cage are generally not greater than 1°.

[0003] Chinese Patent No. CN117109914B, authorized on August 2, 2024, discloses a controllable dynamic excitation test device for a rolling bearing cage in a rotating state and its motion testing method. In this method, as Figure 1 shown, when the bearing rotates driven by the driving mechanism, three radial eddy current sensors 100 (i.e., radial displacement sensors) are used to measure the radial motion of the cage 300, and two axial eddy current sensors 200 (i.e., axial displacement sensors) are used to measure the axial motion of the cage 300. Finally, the tilt angle and skew angle of the cage 300 are calculated through data at five points.

[0004] In Figure 1 the shown bearing, axially, the cage 300 protrudes from the outer ring 400, and the radial displacement sensor is used to measure the radial motion of the cage 300. However, for some bearings, the cage 300 is completely located between the inner ring and the outer ring 400 and does not protrude from the outer ring 400. The radial motion of the cage 300 cannot be measured using a radial displacement sensor, and only relying on two axial displacement sensors cannot measure the tilt angle and skew angle of the cage 300. This method requires a large number of sensors, occupies a large space, the external space of the bearing is narrow, it is inconvenient to arrange, and it can only be applied to a very small number of bearings with cages protruding from the outer ring. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for quickly and efficiently detecting the dynamic angle of a bearing cage to solve the technical problems of the existing detection method being complex in structure and poor in applicability.

[0006] The purpose of the present invention is also to provide a device for quickly and efficiently detecting the dynamic angle of a bearing cage to provide conditions for solving the above same technical problems.

[0007] To achieve the above object, the technical solution of the dynamic angle rapid and efficient detection method for a bearing cage provided by the present invention is as follows:

[0008] A dynamic angle rapid and efficient detection method for a bearing cage measures at least three measuring points on the measured end face on one axial side of the cage through an axial displacement sensor. All axial displacement sensors are located in the same plane perpendicular to the axis of the initial state of the cage, and all measuring points are not on the same straight line. The tilt angle and skew angle of the measured end face are calculated based on the distances measured by the axial displacement sensors, and the tilt angle and skew angle of the cage are represented by the tilt angle and skew angle of the measured end face.

[0009] Furthermore, both the number of axial displacement sensors and the number of measuring points are three.

[0010] Furthermore, all measuring points are located on the same circumference, and the center of the circumference is located on the axis of the initial state of the cage. The measuring points include a first measuring point, a second measuring point, and a third measuring point. The central angle corresponding to the connection line between the first measuring point and the second measuring point is 90°, the central angle corresponding to the connection line between the midpoint of the connection line between the first measuring point and the second measuring point and the third measuring point is 90°, and the connection line between the first measuring point and the second measuring point is perpendicular to the radial direction of the cage.

[0011] Furthermore, the calculation formula for the skew angle α is:

[0012]

[0013] In the formula, L1 is the actual distance from the first axial displacement sensor to the first measuring point, L2 is the actual distance from the second axial displacement sensor to the second measuring point, L3 is the actual distance from the third axial displacement sensor to the third measuring point, and r is the radius of the circumference where the measuring points are located.

[0014] Furthermore, the calculation formula for the tilt angle β is:

[0015]

[0016] In the formula, L1 is the actual distance from the first axial displacement sensor to the first measuring point, L2 is the actual distance from the second axial displacement sensor to the second measuring point, L3 is the actual distance from the third axial displacement sensor to the third measuring point, and r is the radius of the circumference where the measuring points are located.

[0017] The beneficial effects of the dynamic angle rapid and efficient detection method for the bearing cage provided by the present invention are as follows: The present invention is a pioneering invention. The main difference between the present invention and the prior art lies in that in the prior art, the attitude of the cage is calculated by the coordinates of two points on one end face of the cage in the axial direction and three points on the outer peripheral face of the cage, so as to calculate the tilt angle and skew angle of the cage; while in the present invention, only by measuring at least three points on the to-be-measured end face on one side of the cage in the axial direction with an axial displacement sensor, the tilt angle and skew angle of the to-be-measured end face can be calculated, and this layout is beneficial to simplify the calculation, improve the detection efficiency, and use the tilt angle and skew angle of the to-be-measured end face to represent the corresponding tilt angle and skew angle of the cage, that is, the tilt angle and skew angle of the cage are calculated by using the distance between the to-be-measured end face and the sensor. The types and quantities of sensors required by the present invention are less, and this layout is beneficial to simplify the calculation and improve the detection efficiency.

[0018] Since the dynamic angle rapid and efficient detection method for the bearing cage in the present invention does not measure the outer peripheral face of the cage, it can be applied to bearings with the cage not protruding from the outer ring, and can also be applied to bearings with the cage protruding from the outer ring.

[0019] To achieve the above object, the technical solution of the dynamic angle rapid and efficient detection device for the bearing cage provided by the present invention is as follows:

[0020] A dynamic angle rapid and efficient detection device for a bearing cage, comprising a bearing seat for installing a bearing and a driving mechanism for driving the bearing to rotate. The driving mechanism includes a rotary power source, and the output shaft of the rotary power source is used for driving connection with the bearing. The dynamic angle rapid and efficient detection device for the bearing cage further includes a host computer and at least three axial displacement sensors. The axial displacement sensors are used for measuring the to-be-measured end face on one side of the cage in the axial direction, and the arrangement positions of the axial displacement sensors satisfy that: the points measured by all the axial displacement sensors are not on the same straight line, and the tips of all the axial displacement sensors are located in the same plane perpendicular to the axis of the initial state of the cage; the host computer is communicatively connected with the axial displacement sensors and is used for calculating the tilt angle and skew angle of the cage according to the data measured by the axial displacement sensors.

[0021] Furthermore, the axial displacement sensors are arranged on the same circumference, and the center of the circumference is located on the axis of the output shaft.

[0022] Furthermore, the setting positions of the axial displacement sensors satisfy that: the radius of the circumference is equal to the radius of the cage.

[0023] Furthermore, the axial displacement sensor includes a first axial displacement sensor, a second axial displacement sensor, and a third axial displacement sensor. The connection line between the first axial displacement sensor and the second axial displacement sensor is perpendicular to the radial direction of the cage and the central angle corresponding to the connection line is 90°. The central angle corresponding to the connection line between the midpoint of the connection line of the first axial displacement sensor and the second axial displacement sensor and the third axial displacement sensor is 90°.

[0024] Furthermore, an installation groove is provided on one axial side of the bearing housing. An installation plate is detachably installed in the installation groove, and the axial displacement sensor is installed on the installation plate.

[0025] The beneficial effects of the bearing cage dynamic angle rapid and efficient detection device provided by the present invention are as follows: The present invention is an improved invention. The main difference between the present invention and the prior art is that in the prior art, the attitude of the cage is calculated through the coordinates of two points on one axial end face of the cage and three points on the outer peripheral face of the cage, so as to calculate the tilt angle and skew angle of the cage; while in the present invention, only by measuring at least three points on the to-be-measured end face on one axial side of the cage through the axial displacement sensor, the tilt angle and skew angle of the to-be-measured end face can be calculated, and this layout is beneficial to simplifying the calculation, improving the detection efficiency, and using the tilt angle and skew angle of the to-be-measured end face to represent the corresponding tilt angle and skew angle of the cage, that is, calculating the tilt angle and skew angle of the cage by using the distance between the to-be-measured end face and the sensor. The present invention requires fewer types and quantities of sensors, and this layout is beneficial to simplifying the calculation and improving the detection efficiency.

[0026] Since the bearing cage dynamic angle rapid and efficient detection method in the present invention does not need to measure the outer peripheral face of the cage, it can be applied to bearings with cages that do not protrude from the outer ring, and can also be applied to bearings with cages that protrude from the outer ring.

[0027] During use, the bearing is installed on the bearing housing, and the driving mechanism is used to drive the bearing to rotate. The axial displacement sensor measures the distance from the corresponding point on the to-be-measured end face of the cage to the axial displacement sensor in real time (the measured distance is the displacement of the corresponding point on the to-be-measured end face), and the upper computer calculates the tilt angle and skew angle of the cage according to the measured distance. Description of the Drawings

[0028] Figure 1 It is a structural schematic diagram of the cage motion test method in the prior art;

[0029] Figure 2 It is a structural schematic diagram of the bearing cage dynamic angle rapid and efficient detection device of the present invention;

[0030] Figure 3 is Figure 2 a structural schematic diagram of the bearing housing in

[0031] Figure 4 This is a schematic structural diagram of a perspective view of the mounting plate of the dynamic angle rapid and efficient detection device for the bearing cage of the present invention;

[0032] Figure 5 This is a schematic structural diagram of another perspective view of the mounting plate of the dynamic angle rapid and efficient detection device for the bearing cage of the present invention;

[0033] Figure 6 This is a three - coordinate schematic diagram of the cage during the use of the dynamic angle rapid and efficient detection device for the bearing cage of the present invention;

[0034] Figure 7 This is a schematic diagram of the skew angle α of the cage during the use of the dynamic angle rapid and efficient detection device for the bearing cage of the present invention;

[0035] Figure 8 This is a schematic diagram of the tilt angle β of the cage during the use of the dynamic angle rapid and efficient detection device for the bearing cage of the present invention.

[0036] Explanation of reference numerals:

[0037] Figure 1 Among them: 100, radial eddy current sensor; 200, axial eddy current sensor; 300, cage; 400, outer ring.

[0038] Figures 2 to 8 Among them: 1, working platform; 2, variable - frequency motor; 3, motor output shaft; 4, coupling; 5, test shaft; 6, bearing seat; 61, mounting groove; 62, threaded hole; 7, cage; 8, axial displacement sensor; 81, first axial displacement sensor; 82, second axial displacement sensor; 83, third axial displacement sensor; 9, mounting plate; 91, counterbore. Detailed implementation manners

[0039] To solve the problems in the background technology, the core inventive concept of the present invention is: Three points not on the same straight line determine a plane. By measuring the distances from the axial displacement sensors to at least three points on the measured end face on one axial side of the cage, the tilt angle and skew angle of the measured end face are calculated, and the tilt angle and skew angle of the measured end face are used to replace the tilt angle and skew angle of the cage.

[0040] The following further describes the present invention in detail with reference to embodiments.

[0041] Specific embodiments of the dynamic angle rapid and efficient detection method for the bearing cage provided by the present invention:

[0042] Refer to Figures 2 to 8As shown in the figure, the dynamic angle rapid and efficient detection method for the bearing cage provided by the present invention is as follows: Measure at least three measuring points on the measuring end surface on one axial side of the cage 7 through an axial displacement sensor. All axial displacement sensors are located in the same plane perpendicular to the axis of the initial state of the cage 7, and all the measuring points are not on the same straight line. Calculate the tilt angle and skew angle of the measuring end surface according to the distances measured by the axial displacement sensors, and use the tilt angle and skew angle of the measuring end surface to represent the tilt angle and skew angle of the cage.

[0043] In the present invention, since three points not on the same straight line determine a plane, by measuring at least three points on the measuring end surface on one axial side of the cage 7, the tilt angle and skew angle of the measuring end surface can be calculated, and the tilt angle and skew angle of the cage 7 are represented by the tilt angle and skew angle of the measuring end surface.

[0044] It should be specifically noted that when the tilt angle and skew angle of the cage 7 are different, the measuring points can be different points on the cage 7, as long as it can be ensured that they are located on the measuring end surface.

[0045] Taking the axis of the initial state of the cage 7 as the x-axis and the up and down direction as the z-axis to establish a rectangular coordinate system, then the measuring end surface of the cage 7 in the initial state is the plane of x = 0. When the cage 7 tilts, calculate the function of the actual plane where the measuring end surface is located according to the measuring points, and calculate the angle between the actual plane and the plane of x-O-z. This angle is the skew angle of the measuring end surface, and can also be regarded as the skew angle α of the cage 7.

[0046] Similarly, as Figure 6 and 8 shown, if the axis of the initial state of the cage 7 is taken as the z-axis, then the measuring end surface of the cage 7 in the initial state is the plane of z = 0. When the cage 7 tilts, calculate the function of the actual plane where the measuring end surface is located according to the measuring points, and calculate the angle between the actual plane and the plane of y-O-z. This angle is the tilt angle of the measuring end surface, and can also be regarded as the tilt angle β of the cage 7.

[0047] Of course, those skilled in the art can understand that the above function may not actually intersect with the corresponding z-axis or y-axis, but the above function can be translated to intersect with the z-axis or y-axis and calculate the corresponding tilt angle and skew angle.

[0048] Since the dynamic angle rapid and efficient detection method for the bearing cage in the present invention does not need to measure the outer peripheral surface of the cage 7, it can be applied to the bearing where the cage 7 does not protrude from the outer ring, and can also be applied to the bearing where the cage 7 protrudes from the outer ring.

[0049] As a preferred specific implementation manner, the number of measuring points is three. Three points can determine a plane, and at this time, the implementation is the most convenient.

[0050] Of course, in other specific embodiments, the number of measurement points can also be four or more. In this case, a plane can also be determined (i.e., the attitude of the end face to be measured is determined).

[0051] Since the cage 7 has an annular structure and the cage 7 rotates about its own axis, to adapt to the shape of the cage 7, preferably, all the measurement points are located on the same circumference, and the center of this circumference is located on the axis of the initial state of the cage 7 (i.e., the x-axis), which is convenient for arranging the equipment for measuring the measurement points (such as the axial displacement sensor 8).

[0052] Preferably, the radius of the circumference is equal to the radius of the cage 7, which can more conveniently arrange the equipment for measuring the measurement points. It should be specially noted that since the inclination angle and skew angle of the cage 7 are generally less than 1°, when using the axial displacement sensor 8 to measure the measurement points, the situation where the measurement points deviate from the end face to be measured on one side of the axis of the cage 7 will not occur.

[0053] In other specific embodiments, the radius of the circumference can also be slightly smaller than the radius of the cage 7. When using equipment such as the axial displacement sensor 8 for measurement, when the inclination angle and skew angle of the cage 7 are different, the measurement points are different. At the same time, the axial displacement sensor 8 does not rotate with the cage 7. As the cage 7 rotates, the points on the end face to be measured corresponding to the measurement points are constantly changing;

[0054] In other specific embodiments, all the measurement points can also be located on two or more circumferences.

[0055] To facilitate the operation using trigonometric functions, as a preferred specific embodiment, the measurement points include a first measurement point, a second measurement point, and a third measurement point. The central angle corresponding to the line connecting the first measurement point and the second measurement point is 90°, and the central angle corresponding to the line connecting the midpoint of the line connecting the first measurement point and the second measurement point and the third measurement point is 90°. Moreover, the line connecting the first measurement point and the second measurement point is perpendicular to the radial direction of the cage, and each measurement point is correspondingly provided with an axial displacement sensor 8.

[0056] In Figure 5 In the shown specific embodiment, the axis of the cage extends horizontally, and the first measurement point and the second measurement point are at the same height.

[0057] In other specific embodiments, the axis of the cage extends vertically, and the line connecting the first measured point and the second measured point is in the horizontal plane and perpendicular to the radial direction of the cage.

[0058] At this time, referring to Figures 6 to 8 As shown, the calculation formula for the skew angle α of the cage 7 is:

[0059]

[0060] Wherein, L1 is the distance between the first axial displacement sensor 81 and the first measuring point, L2 is the distance between the second axial displacement sensor 82 and the second measuring point, L3 is the distance between the third axial displacement sensor 83 and the third measuring point, and r is the radius of the cage 7 (i.e., the radius of the circumference where the measuring points are located). Since the central angle corresponding to the line connecting the first measuring point and the second measuring point is 90°, the corresponding hypotenuse is

[0061] Similarly, on the basis that the tilt angle and skew angle of the cage 7 are generally less than 1°, the tilt angle β of the cage 7 can also be calculated through trigonometric functions. Referring to Figures 6 to 8 As shown, the calculation formula for the tilt angle β of the cage 7 is:

[0062]

[0063] Wherein, ∝ is the angle of the calculated skew angle.

[0064] Those skilled in the art can understand that the arrangement forms of the axial displacement sensors 8 are diverse, and the number of sensors required in this solution is the least. When the relative arrangement positions of the axial displacement sensors 8 are different, the calculation formulas for the tilt angles and skew angles are different. The calculation formula of this solution is the simplest, and at the same time, it can avoid the approximate error of trigonometric irrational numbers, and the calculation accuracy is high.

[0065] At the same time, those skilled in the art can understand that after determining a plane with three points, those skilled in the art can use any mathematical tool to calculate the tilt angles and skew angles of the plane (i.e., the end face to be measured).

[0066] Specific embodiments of the bearing cage dynamic angle rapid and efficient detection device provided by the present invention:

[0067] As Figures 2 to 8 shown, the bearing cage dynamic angle rapid and efficient detection device includes a bearing seat 6 for installing a bearing and a driving mechanism for driving the bearing to rotate. The driving mechanism includes a rotational power source. The rotational power source is preferably a commonly used rotational power source such as a variable-frequency motor 2 or a rotary cylinder, and the output shaft of the rotational power source is used for driving connection with the bearing.

[0068] The dynamic angle rapid and efficient detection device for the bearing cage further includes a host computer (devices such as a computer or an industrial control computer) and at least three axial displacement sensors 8. The axial displacement sensors 8 are used to measure the to-be-tested end face on one axial side of the cage 7, and the arrangement positions of the axial displacement sensors 8 satisfy that: the points measured by all the axial displacement sensors 8 are not on the same straight line, and the probe heads of all the axial displacement sensors are located on the same plane perpendicular to the axis of the initial state of the cage; the host computer is communicatively connected to the axial displacement sensors 8 and is used to calculate the tilt angle and skew angle of the cage 7 according to the data measured by the axial displacement sensors 8.

[0069] For the specific calculation methods of the tilt angle and skew angle of the cage, please refer to the discussion in the specific embodiments of the dynamic angle rapid and efficient detection method for the bearing cage of the present invention, and details will not be elaborated here.

[0070] Among them, the number of axial displacement sensors 8 is the same as the number of measurement points, and both can be three, four or more. As long as a plane can be determined based on the measurement points of the axial displacement sensors 8; when the frequency of the rotary power source is adjustable, the tilt angle and skew angle of the cage 7 at different rotational speeds can be measured; the output shaft of the rotary power source ( Figure 2 in this case, it is the motor output shaft 3) can be directly drivingly connected to the inner ring of the bearing; or it can be connected to the test shaft 5 through the coupling 4, and the test shaft 5 is then connected to the inner ring of the bearing. At this time, the output shaft of the rotary power source is indirectly drivingly connected to the bearing.

[0071] Since the dynamic angle rapid and efficient detection method for the bearing cage in the present invention does not need to measure the outer peripheral surface of the cage 7, it can be applied to bearings where the cage 7 does not protrude from the outer ring, and can also be applied to bearings where the cage 7 protrudes from the outer ring.

[0072] During use, the bearing is installed on the bearing seat 6, and the driving mechanism is used to drive the bearing to rotate. The axial displacement sensors 8 measure the distance from the corresponding points on the to-be-tested end face of the cage 7 to the axial displacement sensors 8 in real time (or the displacement of the corresponding points on the to-be-tested end face), and the host computer calculates the tilt angle and skew angle of the cage 7 according to the data of the measurement points.

[0073] The following introduces the parts of the dynamic angle rapid and efficient detection device for the bearing cage of the present invention corresponding to the dynamic angle rapid and efficient detection method for the bearing cage of the present invention.

[0074] As a preferred specific implementation manner, the axial displacement sensors 8 are arranged on the same circumference, and the center of this circumference is located on the axis of the output shaft. At this time, the measurement points are located on the same circumference.

[0075] In other specific implementation manners, the axial displacement sensors 8 can also be arranged on at least two circumferences (such as two, three or more), and at this time the measurement points are located on at least two circumferences.

[0076] As a preferred specific embodiment, the installation position of the axial displacement sensor 8 satisfies that the radius of the circumference is equal to the radius of the cage 7. At this time, the radius of the circumference where the measuring point is located is equal to the radius of the cage 7.

[0077] In other specific embodiments, the radius of the circumference is slightly smaller than the radius of the cage 7, as long as the measuring point corresponding to the axial displacement sensor 8 is always located on the end face to be measured.

[0078] For the convenience of calculation, as a specific embodiment, the axial displacement sensor 8 includes a first axial displacement sensor 81, a second axial displacement sensor 82, and a third axial displacement sensor 83. The connection line of the first axial displacement sensor 81 and the second axial displacement sensor 82 is perpendicular to the radial direction of the cage 7 and the central angle corresponding to the connection line is 90°. The central angle corresponding to the connection line between the midpoint of the connection line of the first axial displacement sensor 81 and the second axial displacement sensor 82 and the third axial displacement sensor 83 is 90°.

[0079] When the axis of the cage 7 extends horizontally, the first axial displacement sensor 81 and the second axial displacement sensor 82 are at the same height; when the axis of the cage 7 extends vertically, the connection line of the first axial displacement sensor 81 and the second axial displacement sensor 82 is located in the horizontal plane and is perpendicular to the radial direction of the cage 7.

[0080] At this time, the tilt angle and skew angle of the cage 7 can be calculated using the calculation formula described above.

[0081] The following introduces the specific installation method of the axial displacement sensor 8.

[0082] As Figures 2 to 5 shown, as a specific embodiment, an installation groove 61 is provided on one axial side of the bearing housing 6. An installation plate 9 is detachably installed in the installation groove 61, and the axial displacement sensor 8 is installed on the installation plate 9, with a simple structure.

[0083] Specifically, a threaded hole 62 is provided on the bottom wall of the installation groove 61, and a countersunk hole 91 is provided on the installation plate 9. A bolt passes through the countersunk hole 91 and is threadedly connected to the threaded hole 62 to realize the installation of the installation plate 9 and the bearing housing 6; a threaded hole is provided on the installation plate 9, and a bolt passes through the through hole on the axial displacement sensor 8 and is threadedly connected to the threaded hole to install the axial displacement sensor 8 on the installation plate 9.

[0084] Of course, in other specific embodiments, the axial displacement sensor 8 can also be fixed on the installation plate 9 by means of bonding, etc. Or, a bracket is installed on the working platform 1, and the axial displacement sensor 8 is fixedly installed on the bracket by means of bolt connection or bonding, etc.

[0085] The following introduces the content not mentioned above.

[0086] The bearing housing 6 is fixed on the working platform 1 by bolts. The bearing housing 6 is divided into upper and lower parts, and the two parts are connected and fixed by bolts. The test shaft 5 is erected on the working platform 1 by a pair of bearing housings 6.

[0087] The upper computer is an industrial control computer. The output line of the axial displacement sensor 8 is connected to the terminal block, and the terminal block is connected to the acquisition card through a wire. The acquisition card is used to collect the signal of the axial displacement sensor 8, and the acquisition card is installed in the corresponding card slot of the industrial control computer so that the industrial control computer can collect the data measured by the axial displacement sensor 8.

[0088] The corresponding software is installed on the industrial control computer. The program can be developed using the software programming platform, and the tilt angle and skew angle of the cage 7 can be calculated using the data measured by the axial displacement sensor 8.

[0089] This software can also store the measurement data in real time, calculate the tilt angle and skew angle of the cage, and draw the change curves of the tilt angle and skew angle of the cage over time, so as to observe the dynamic angle change of the cage 7.

[0090] It should be specially noted that in the dynamic angle rapid and efficient detection device for the bearing cage provided by the present invention, only at least three axial displacement sensors 8 (preferably three) are required to quickly and efficiently detect the dynamic tilt angle and skew angle of the cage 7. The structure is simple, the cost is low, and it is suitable for various different bearings.

[0091] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions described in the foregoing embodiments without creative efforts, or make equivalent replacements for some of the technical features, or combine different specific implementation manners organically to combine the specific implementation manners given in the drawings. Of course, those skilled in the art can also combine the specific implementation manners not given in the remaining specification drawings. Any modifications, equivalent replacements, improvements, 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 dynamic angle rapid and efficient detection method for a bearing cage, characterized in that Measure at least three measuring points on the measured end face on one axial side of the cage through axial displacement sensors. All axial displacement sensors are located in the same plane perpendicular to the axis of the initial state of the cage, and all measuring points are not on the same straight line. Calculate the tilt angle and skew angle of the measured end face based on the distances measured by the axial displacement sensors, and represent the tilt angle and skew angle of the cage with the tilt angle and skew angle of the measured end face.

2. The dynamic angle rapid and efficient detection method for a bearing cage according to claim 1, characterized in that The number of axial displacement sensors and measuring points is three.

3. The dynamic angle rapid and efficient detection method for a bearing cage according to claim 1 or 2, characterized in that All measuring points are located on the same circumference, and the center of the circumference is located on the axis of the initial state of the cage. The measuring points include a first measuring point, a second measuring point, and a third measuring point. The central angle corresponding to the connection line between the first measuring point and the second measuring point is 90°, the central angle corresponding to the connection line between the midpoint of the connection line between the first measuring point and the second measuring point and the third measuring point is 90°, and the connection line between the first measuring point and the second measuring point is perpendicular to the radial direction of the cage.

4. The dynamic angle rapid and efficient detection method for a bearing cage according to claim 3, wherein The calculation formula for the skew angle α is: In the formula, L1 is the actual distance from the first axial displacement sensor to the first measuring point, L2 is the actual distance from the second axial displacement sensor to the second measuring point, L3 is the actual distance from the third axial displacement sensor to the third measuring point, and r is the radius of the circumference where the measuring points are located.

5. The dynamic angle rapid and efficient detection method for a bearing cage according to claim 3, characterized in that, The calculation formula for the tilt angle β is: In the formula, L1 is the actual distance from the first axial displacement sensor to the first measuring point, L2 is the actual distance from the second axial displacement sensor to the second measuring point, L3 is the actual distance from the third axial displacement sensor to the third measuring point, and r is the radius of the circumference where the measuring points are located.

6. A dynamic angle rapid and efficient detection device for a bearing cage, comprising a bearing seat for mounting a bearing and a driving mechanism for driving the bearing to rotate. The driving mechanism includes a rotary power source, and the output shaft of the rotary power source is used for driving connection with the bearing. It is characterized in that, The dynamic angle rapid and efficient detection device for the bearing cage further includes a host computer and at least three axial displacement sensors. The axial displacement sensors are used to measure the measured end face on one axial side of the cage, and the arrangement positions of the axial displacement sensors meet the following requirements: the points measured by all axial displacement sensors are not on the same straight line, and the probe heads of all axial displacement sensors are located in the same plane perpendicular to the axis of the initial state of the cage; the host computer is communicatively connected to the axial displacement sensors and is used to calculate the tilt angle and skew angle of the cage according to the data measured by the axial displacement sensors.

7. The dynamic angle rapid and efficient detection device for a bearing cage according to claim 6, characterized in that, The axial displacement sensors are arranged on the same circumference, and the center of the circumference is located on the axis of the output shaft.

8. The dynamic angle rapid and efficient detection device for a bearing cage according to claim 7, characterized in that The setting position of the axial displacement sensors meets the requirement that the radius of the circumference is equal to the radius of the cage.

9. The dynamic angle rapid and efficient detection device for a bearing cage according to claim 7 or 8, characterized in that, The axial displacement sensors include a first axial displacement sensor, a second axial displacement sensor, and a third axial displacement sensor. The connection line between the first axial displacement sensor and the second axial displacement sensor is perpendicular to the radial direction of the cage and the central angle corresponding to the connection line is 90°. The central angle corresponding to the connection line between the midpoint of the connection line between the first axial displacement sensor and the second axial displacement sensor and the third axial displacement sensor is 90°.

10. The dynamic angle rapid and efficient detection device for a bearing cage according to any one of claims 6 to 8, characterized in that An installation groove is provided on one axial side of the bearing housing. An installation plate is detachably installed in the installation groove, and the axial displacement sensors are installed on the installation plate.

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