CN111487433B - Bearing retainer slip rate measuring method, and rotating speed measuring method, device and system - Google Patents
Bearing retainer slip rate measuring method, and rotating speed measuring method, device and system Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
- G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
Abstract
The invention relates to a method, a device and a system for measuring the slip rate of a bearing retainer and a method, a device and a system for measuring the rotating speed of the bearing retainer, and belongs to the technical field of bearing measurement. The rotating speed measuring method comprises the following steps: setting a reference point with a fixed position, and setting a marking point on a rolling bearing retainer; acquiring the relative position information of the mark point relative to the reference point within the set time in the rotating process of the rolling bearing retainer; determining the motion track of the mark point according to the relative position information; determining the motion period of the rolling bearing retainer according to the motion track; and obtaining the actual rotating speed of the rolling bearing retainer according to the movement period of the rolling bearing retainer. The invention only needs to acquire the relative position information of two points, utilizes the characteristic of the rotation periodicity of the bearing to obtain the periodic track, and then utilizes the period to obtain the rotating speed, the method is simple, and the relative position information is influenced by the vibration in the rotating process to be extremely small, so the accuracy of the rotating speed measurement is greatly improved.
Description
Technical Field
The invention relates to a method, a device and a system for measuring the slip rate of a bearing retainer and a method, a device and a system for measuring the rotating speed of the bearing retainer, and belongs to the technical field of bearing measurement.
Background
As a precision part, a rolling bearing is widely used in various rotary machines. Along with the development of high-end equipment manufacturing industry, higher requirements are put forward on the working performance of the rolling bearing, and the characteristics of future bearings such as high rotating speed, high precision and long service life are provided. The behavior of rolling bearing failure is many, for example: under the working condition of high speed and light load, the bearing often slips, so that the bearing fails early and the service life of the rolling bearing is seriously influenced.
One common form of bearing slippage is rolling element slippage, which is also abrasive and noisy, primarily due to the sliding of the contact surfaces of the rolling elements and the raceways, which manifests as actual cage rotational speeds below the theoretically calculated cage rotational speeds. Therefore, it is very important to measure the actual rotation speed of the high-speed rolling bearing cage and analyze the slip ratio.
At present, in order to quickly and simply measure the actual rotating speed of the retainer, a sensor is generally adopted for direct measurement, for example, the application publication number is CN 110514443a, the application document discloses a non-contact measurement method for the slip ratio of the retainer of the aviation bearing, the method fixes the outer ring of the aviation bearing on a bearing seat, a weak magnetic detection sensor probe is installed on the bearing seat, in the measurement process, the outer ring is fixed, a rolling body, the retainer and an inner ring all move circumferentially around the central axis of the aviation bearing, and the rolling body and the retainer move synchronously; the measuring method is that the mixed magnetic field information generated by the rolling body and the inner ring is collected by the weak magnetic detection sensor probe; obtaining the characteristic frequency of the rotation of the inner ring and the characteristic frequency of the rotation of the rolling body through the mixed magnetic field information; and further obtaining the actual rotating speed of the inner ring and the actual rotating speed of the rolling body, wherein the actual rotating speed of the rolling body is the actual rotating speed of the retainer, and obtaining the slip ratio according to the actual rotating speed of the inner ring and the actual rotating speed of the retainer.
According to the measuring method, in the measuring process, magnetic field information is collected, however, the magnetic field information is weak, and is easily interfered by an electromagnetic environment, so that the precision of the magnetic field information collected by the weak magnetic detection sensor is directly influenced, and under the condition of low precision of the magnetic field information, the obtained characteristic frequency error of the rotation of the rolling body is large, so that the rotating speed of the obtained retainer is not accurate, and further the detection of the slip ratio is also inaccurate.
Disclosure of Invention
The application aims to provide a rotating speed measuring method of a rolling bearing retainer, which is used for solving the problem that the existing rotating speed measuring method is low in measuring accuracy; meanwhile, a rotating speed measuring device for the rolling bearing retainer is also provided, and is used for solving the problem of low measuring accuracy of the existing rotating speed measuring device; meanwhile, a rolling bearing retainer rotating speed measuring system is also provided to solve the problem of low measuring accuracy of the existing rotating speed measuring system; meanwhile, a rolling bearing retainer slip rate measuring method is also provided, and the method is used for solving the problem that the slip rate measuring accuracy is low in the existing method.
In order to achieve the purpose, the application provides a technical scheme of a rotating speed measuring method of a rolling bearing retainer, which comprises the following steps:
1) setting a reference point with a fixed position, and setting a marking point on a rolling bearing retainer;
2) acquiring the relative position information of the mark point relative to the reference point within the set time in the rotating process of the rolling bearing retainer;
3) determining the motion track of the mark point according to the relative position information;
4) determining the motion period of the rolling bearing retainer according to the motion track;
5) and obtaining the actual rotating speed of the rolling bearing retainer according to the movement period of the rolling bearing retainer.
The technical scheme of the rolling bearing retainer rotating speed measuring method has the beneficial effects that: the invention makes a mark point on the rolling bearing retainer, and sets a reference point with fixed position, and can obtain the motion track of the mark point relative to the reference point by obtaining the relative position information of the two points. In the whole process, only the relative position information of the two points needs to be acquired, the characteristic of the rotation periodicity of the bearing is utilized to obtain a periodic track, and then the rotation speed is obtained periodically.
Further, in order to improve the accuracy of the acquisition of the relative position information, the relative position information is acquired by a high-speed camera.
Furthermore, in order to improve the convenience of the rotating speed measurement, the reference point is arranged on the outer ring of the rolling bearing.
In addition, the present application also provides a technical solution of a rolling bearing cage rotation speed measuring device, which includes a processor, a memory, and a computer program stored in the memory and operable on the processor, wherein the processor implements the following steps when executing the computer program:
1) acquiring the relative position information of a marking point relative to a reference point within a set time in the rotating process of the rolling bearing retainer; the mark point is a mark point arranged on the rolling bearing retainer; the reference point is a fixed reference point;
2) determining the motion track of the mark point according to the relative position information;
3) determining the motion period of the rolling bearing retainer according to the motion track;
4) and obtaining the actual rotating speed of the rolling bearing retainer according to the movement period of the rolling bearing retainer.
The technical scheme of the rolling bearing retainer rotating speed measuring device has the beneficial effects that: the invention makes a mark point on the rolling bearing retainer, and sets a reference point with fixed position, and can obtain the motion track of the mark point relative to the reference point by obtaining the relative position information of the two points. In the whole process, only the relative position information of the two points needs to be acquired, the characteristic of the rotation periodicity of the bearing is utilized to obtain a periodic track, and then the rotation speed is obtained periodically.
In addition, this application still provides a technical scheme of antifriction bearing holder rotational speed measurement system, and this system includes:
the acquisition device is used for acquiring the relative position information of the mark point relative to the reference point within the set time in the rotation process of the rolling bearing retainer; the mark point is a mark point arranged on the rolling bearing retainer; the reference point is a fixed reference point;
the processing device is connected with the acquisition device and used for sending the acquired relative position information to the processing device, and the processing device is used for determining the motion track of the mark point according to the relative position information; determining the motion period of the rolling bearing retainer according to the motion track; and then the actual rotating speed of the rolling bearing retainer is obtained according to the movement period of the rolling bearing retainer.
The technical scheme of the rolling bearing retainer rotating speed measuring system has the beneficial effects that: the invention collects the relative position information between the mark point on the rolling bearing retainer and a fixed reference point through the collecting device, the processing device can obtain the motion track of the mark point relative to the reference point through the relative position information, the motion track of the mark point relative to the reference point is a periodic track because the mark point is synchronous with the motion of the rolling bearing retainer and the rolling bearing retainer does periodic circular motion, and the actual rotating speed of the rolling bearing retainer can be calculated under the condition of determining the motion cycle of the mark point. In the whole process, only the relative position information of the two points needs to be acquired, the characteristic of the rotation periodicity of the bearing is utilized to obtain a periodic track, and then the rotation speed is obtained periodically.
Further, in order to improve the accuracy of relative position information acquisition, the acquisition device is a high-speed camera.
Furthermore, in order to improve the convenience of the rotating speed measurement, the reference point is arranged on the outer ring of the rolling bearing.
In addition, the application also provides a technical scheme of the method for measuring the slip rate of the rolling bearing retainer, which comprises the following steps:
1) determining the rotating speed of an inner ring of the rolling bearing, setting a fixed reference point, and setting a mark point on a rolling bearing retainer;
2) acquiring the relative position information of the mark point relative to the reference point within the set time in the rotating process of the rolling bearing retainer;
3) determining the motion track of the mark point according to the relative position information;
4) determining the motion period of the rolling bearing retainer according to the motion track;
5) obtaining the actual rotating speed of the rolling bearing retainer according to the movement period of the rolling bearing retainer; obtaining the theoretical rotating speed of the rolling bearing retainer according to the rotating speed of the inner ring of the rolling bearing;
6) and obtaining the slip ratio of the rolling bearing according to the actual rotating speed of the rolling bearing retainer and the theoretical rotating speed of the rolling bearing retainer.
The technical scheme of the rolling bearing retainer slip rate measuring method has the beneficial effects that: the invention makes a mark point on the rolling bearing retainer, sets a reference point with fixed position, and can obtain the motion track of the mark point relative to the reference point by obtaining the relative position information of the two points. In the whole process, only the relative position information of two points is needed to be acquired, the characteristic of the rotation periodicity of the bearing is utilized, the periodic track is obtained, then the rotation speed is obtained periodically, the rotation speed measuring method is very simple, and the influence of the vibration of the relative position information in the rotation process is very small and can be ignored, so that the accuracy of the rotation speed measurement is greatly improved, and on the basis of improving the accuracy of the rotation speed measurement, the accuracy of the slip rate is correspondingly improved.
Further, in order to obtain the theoretical rotating speed of the rolling bearing retainer, the calculation process of the theoretical rotating speed of the rolling bearing retainer is as follows:
wherein n iscThe theoretical rotating speed of the rolling bearing retainer is r/min; n isiThe unit is r/min of the rotating speed of the inner ring of the rolling bearing; gamma is a dimensionless parameter of the rolling bearing, gamma is Dw×cosα/dm；DwIs the diameter of the rolling body in mm; alpha is the contact angle, unit degree; dmThe pitch circle diameter of the rolling bearing is unit mm.
Drawings
FIG. 1 is a structural view of a system for measuring the rotational speed of a rolling bearing cage according to the invention;
FIG. 2 is a flow chart of a rolling bearing cage rotational speed measurement method of the present invention;
FIG. 3 is a schematic diagram of the positions of the mark points and the reference points when the motion tracks of the mark points are recorded;
FIG. 4 is a schematic diagram of the movement locus of the mark point when the rotating speed of the main shaft of the rolling bearing is 10000 r/min;
FIG. 5 is a schematic diagram of the motion trace of the mark point when the rotating speed of the main shaft of the rolling bearing is 20000 r/min;
FIG. 6 is a schematic structural view of a rotational speed measuring device of a rolling bearing cage according to the present invention;
in the figure: the device comprises a rolling bearing inner ring 1, a rolling bearing retainer 2, a rolling bearing outer ring 3, a rolling body 4, a high-speed camera 5, a mark point 6 and a reference point 7.
Detailed Description
Embodiment of the rolling bearing cage rotating speed measuring system:
as shown in fig. 1, the rolling bearing retainer rotational speed measuring system (hereinafter referred to as measuring system) includes a high-speed camera 5 and a processing device (not shown in the figure), the high-speed camera 5 is connected to the processing device, and transmits the acquired information to the processing device, and the processing device processes the acquired information to obtain the actual rotational speed of the rolling bearing retainer 2.
As shown in fig. 1, the rolling bearing is composed of a rolling bearing inner ring 1, a rolling bearing retainer 2, a rolling bearing outer ring 3 and rolling bodies 4, wherein the rolling bearing inner ring 1 is sleeved on a rotating shaft and moves along with the rotating shaft; the outer ring 3 of the rolling bearing is arranged in a bearing hole of the machine base or a part and is fixed; the rolling bearing inner ring 1 and the rolling bearing outer ring 3 are provided with raceways, rolling bodies 4 are arranged in the raceways, and when the rolling bearing inner ring 1 and the rolling bearing outer ring 3 rotate relatively, the rolling bodies 4 roll along the raceways; the rolling bearing cage 2 serves to space the rolling bodies 4 evenly along the raceways.
As can be seen from the structure of the rolling bearing, in order to measure the rotation speed of the rolling bearing cage 2, the outer ring 3 of the rolling bearing needs to be fixed on a test stand or other fixing device to enable the rolling bearing to start working, in this embodiment, because the required information is collected by the high-speed camera 5, one side of the rolling bearing cage 2 needs to be exposed in the visual field, specifically, the rotation speed of the rolling bearing cage 2 is measured by the measurement method shown in fig. 2:
1) arranging a measuring platform
Sleeving a rolling bearing inner ring 1 on a rotating shaft (the rotating shaft is a main shaft of a test bed), fixing a rolling bearing outer ring 3 on the test bed, exposing one side of a rolling bearing in a visual field, drawing a marking point 6 on a rolling bearing retainer 2 by using a black marking pen on the exposed side, and drawing a reference point 7 on the rolling bearing outer ring 3;
placing a high-speed camera 5, wherein the lens of the high-speed camera 5 is opposite to the exposed side of the rolling bearing and keeps a certain distance from the rolling bearing, so that the high-speed camera 5 can capture the mark point 6 and the reference point 7 at the same time in the rotating process of the rolling bearing; the shooting frame number and the resolution of the high-speed camera 5 are set, the shooting speed of the high-speed camera is 40,000fps under 1280 x 800 resolution, the sensitivity ISO (REI) Daylight 50000 can clearly shoot and capture images of the rolling bearing retainer 2 at the rotating speed of 30,000 r/min. The focusing of the lens is rotated, a spotlight or a light supplement lamp can be arranged according to the requirement of light, the light supplement is carried out when the camera is used for shooting, and the shooting definition of the high-speed camera 5 is ensured.
In order to clearly capture the image of the rolling bearing holder 2 during rotation, the high-speed camera 5 needs to capture an image at a speed higher than the rotation speed of the main shaft, for example: when the spindle rotation speed is 30000r/min, the shooting speed of the high-speed camera 5 is 40,000fps, and when the spindle rotation speed is increased, the shooting speed of the high-speed camera 5 is continuously increased.
2) And controlling the main shaft of the test bed to meet the requirement of the rotating speed, starting shooting by the high-speed camera 5, setting the shooting time of the high-speed camera 5 to be 2s (namely, setting time), acquiring the relative position information of the marking point 6 relative to the reference point 7, and sending the acquired information to the processing device.
3) The processing device processes the acquired information, wherein the acquired information refers to a series of picture information of the reference point 7 and the mark point 6 acquired by the high-speed camera 5, reads out the relative distance between the reference point 7 and the mark point 6 in all the picture information, and then obtains the motion track of the mark point 6 relative to the reference point 7 according to the relative distance of the mark point 6 relative to the reference point 7;
because the rolling bearing performs periodic circular motion, the motion track of any point on the rolling bearing retainer 2 is also a periodic motion track, and the motion cycle of the rolling bearing retainer 2 (i.e. the motion cycle of the mark point 6 relative to the reference point 7) is determined according to the motion track; the movement period corresponds to the time length of one rotation of the rolling bearing retainer 2; for example: the corresponding time difference between adjacent peak points in the curve of the motion trail is the motion period;
the actual rotational speed of the rolling bearing cage 2 can be calculated after the length of time for which the rolling bearing cage 2 has rotated once is determined.
In order to obtain the actual rotating speed, the high-speed camera 5 shoots at least the motion track of one rotation of the rolling bearing retainer 2, so that the shooting duration is longer than the duration of one period, but the duration of one period can be obtained only after shooting, so that the theoretical rotating speed of the rolling bearing retainer 2 is generally determined according to the rotating speed of the main shaft, then the shooting duration of the high-speed camera 5 is determined according to the theoretical rotating speed of the rolling bearing retainer 2, and generally, the shooting duration is longer than the duration of five rotations at the theoretical rotating speed.
In the above embodiment, the reference point 7 is arranged on the outer ring 3 of the rolling bearing, and the reference point 7 is only used as a reference to obtain the motion track of the mark point 6, so as to be used as another embodiment, the reference point 7 may also be arranged at another position, for example: a fixed reference point on the test bed can be shot by the high-speed camera 5, and certainly, in order to make the relative position information more accurate, the position of the reference point 7 and the exposed side of the rolling bearing are ensured to be on the same plane as much as possible.
In the above embodiment, in order to mark the mark points 6, the mark points 6 are drawn on the rolling bearing holder 2 and the rolling bearing outer ring 3 using a black marker pen, and as another embodiment, a mark paste may be applied to the rolling bearing holder 2 and the rolling bearing outer ring 3 as the mark points 6.
In the following, the actual rotational speed of the rolling bearing cage 2 is measured by the method according to the invention, as shown in fig. 3, the marking points 6 are arranged on the rolling bearing cage 2 and, in order to obtain a movement path from the image more easily, the reference points 7 are arranged on the platform cage at a position which is further away from the marking points 6.
The rotating speeds of the main shaft are respectively set to 10000r/min and 20000r/min, and the specific size parameters and working condition parameters of the rolling bearing are shown in the table I:
table one test parameter
The movement tracks shown in fig. 4 and 5 are obtained by the measuring method of the invention, the tracks in the figures respectively have 5 peak values, and the movement cycle obtained by reading the corresponding time difference between each adjacent peak value is shown in table two:
table two movement period data
It can be seen from the data in table two that, when the test rotation speed (i.e. the rotation speed of the main shaft) is 10000r/min, the average value of the movement period is 14.95ms, that is, the duration of one rotation is 14.95ms, then one minute of rotation is 4013.4 rotations, that is, the actual rotation speed of the rolling bearing retainer 2 is 4013.4 r/min; when the test rotating speed is 20000r/min, the average value of the movement period is 7.5ms, and then one minute is 7999.9 revolutions, namely the actual rotating speed of the rolling bearing retainer 2 is 7999.9 r/min.
The invention adopts the principle of periodic circular motion to obtain the periodic motion track of the rolling bearing retainer 2 and obtain the actual rotating speed of the rolling bearing retainer 2 according to the period of the motion track, and the method is not influenced by vibration factors and can simply and accurately measure the actual rotating speed of the rolling bearing retainer 2.
Embodiment of the rotating speed measuring device of the rolling bearing retainer:
the rolling bearing cage rotational speed measuring device, i.e., the processing device in the embodiment of the rolling bearing cage rotational speed measuring system, as shown in fig. 6, includes a processor, a memory, and a computer program stored in the memory and executable on the processor, and the processor implements the rolling bearing cage rotational speed measuring method when executing the computer program.
The specific implementation process and effect of the rolling bearing cage rotation speed measurement method are described in the embodiment of the rolling bearing cage rotation speed measurement system, and are not described herein again.
That is, the method in the above embodiment of the rolling bearing cage rotational speed measurement system should be understood that the flow of the rolling bearing cage rotational speed measurement method may be implemented by computer program instructions. These computer program instructions may be provided to a processor (e.g., a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus), such that the instructions, which execute via the processor, create means for implementing the functions specified in the method flow.
The processor referred to in this embodiment refers to a processing device such as a microprocessor MCU or a programmable logic device FPGA;
the memory of the present embodiment is used for storing computer program instructions for implementing the method for measuring the rotational speed of the rolling bearing cage, and includes a physical device for storing information, and the information is usually digitized and then stored in a medium using an electric, magnetic or optical method. For example: various memories for storing information by using an electric energy mode, such as RAM, ROM and the like; various memories for storing information by magnetic energy, such as hard disk, floppy disk, magnetic tape, magnetic core memory, bubble memory, and U disk; various types of memory, CD or DVD, that store information optically. Of course, there are other ways of memory, such as quantum memory, graphene memory, and so forth.
The rolling bearing retainer rotating speed measuring device formed by the memory and the processor, which are used for storing the computer program instructions formed by realizing the rolling bearing retainer rotating speed measuring method, is realized by the processor executing the corresponding program instructions in the computer, and the computer can be realized by a windows operating system, a linux system or the like, for example, an android and an iOS system programming language in an intelligent terminal, a quantum computer-based processing logic realization and the like.
As another embodiment, the device for measuring the rotational speed of the rolling bearing holder may further include other processing hardware, such as a database, a multi-level cache, a GPU, and the like.
Embodiment of the method for measuring the rotating speed of the rolling bearing retainer:
the rolling bearing cage rotation speed measurement method is the measurement method mentioned in the embodiment of the rolling bearing cage rotation speed measurement system, and the specific implementation process and effect of the rolling bearing cage rotation speed measurement method are already described in the embodiment of the rolling bearing cage rotation speed measurement system, and are not described herein again.
Embodiment of the measuring method of the slip rate of the rolling bearing retainer:
the rolling bearing retainer slip rate measuring method is to calculate the slip rate on the basis of the rolling bearing retainer rotating speed measuring method, so that a system on which the rolling bearing retainer slip rate measuring method is based is the same as the rolling bearing retainer rotating speed measuring system, and a detailed description on how to obtain the actual rotating speed of the rolling bearing retainer 2 has been given in the embodiment of the rolling bearing retainer rotating speed measuring system, which is not repeated in this embodiment.
The calculation process of the rolling bearing slip ratio is the prior art, and the specific calculation process is as follows:
wherein S is the rolling bearing slipping rate;
the actual rotation speed of the rolling bearing retainer 2 is in r/min; n iscThe theoretical rotational speed of the rolling bearing cage 2 is given in r/min.
As can be seen from the above formula, in order to obtain the rolling bearing slip ratio, besides the actual rotation speed of the rolling bearing cage 2, a theoretical rotation speed of the rolling bearing cage 2 is also required, and for calculation of the theoretical rotation speed, the rotation speed of the rolling bearing inner ring 1 needs to be determined first, and then the theoretical rotation speed is obtained by using the following formula:
wherein n iscThe theoretical rotating speed of the rolling bearing retainer 2 is in r/min; n is a radical of an alkyl radicaliThe unit is r/min of the rotating speed of the inner ring 1 of the rolling bearing; gamma is a dimensionless parameter of the rolling bearing, gamma is Dw×cosα/dm；noThe unit r/min of the rotating speed of the outer ring 3 of the rolling bearing; dwThe diameter of the rolling body is 4 mm; alpha is the contact angle, unit degree; dmIs the pitch circle diameter of the rolling bearing, wherein
D is the outer diameter of the rolling bearing in unit mm; d is the inner diameter of the rolling bearing in mm.
Because the outer ring 3 of the rolling bearing is fixed in the measuring process, the formula of the theoretical rotating speed is abbreviated as follows:
calculating the slip ratio of the rolling bearing retainer by combining specific measurement test data in a rolling bearing retainer rotating speed measurement system, wherein the rotating speed of the inner ring 1 of the rolling bearing is the rotating speed (test rotating speed) of the main shaft, and obtaining the results shown in the third table:
table three slip rate data
As can be seen from the data in the third table, when the test rotating speed is 10000r/min, the theoretical rotating speed of the rolling bearing retainer 2 is 4018.0r/min, the actual rotating speed of the rolling bearing retainer 2 is 4013.4r/min, and the slip rate is 0.114%; when the test rotating speed is 20000r/min, the theoretical rotating speed of the rolling bearing retainer 2 is 8035.86r/min, the actual rotating speed of the rolling bearing retainer 2 is 7999.9r/min, and the slip rate is 0.447%.
In the case of an accurate measurement of the actual rotational speed, the corresponding slip measurement is then likewise accurate.
Claims (9)
1. A method for measuring the rotating speed of a rolling bearing retainer is characterized by comprising the following steps:
1) setting a reference point with a fixed position, and setting a mark point on a rolling bearing retainer;
2) acquiring the relative position information of the mark point relative to the reference point within the set time in the circumferential rotation process of the rolling bearing retainer;
3) reading the relative distance between the marking point and the reference point according to the relative position information, and determining the motion track of the marking point according to the relative distance of the marking point relative to the reference point;
4) determining the motion period of the rolling bearing retainer according to the motion track;
5) and obtaining the actual rotating speed of the rolling bearing retainer according to the movement period of the rolling bearing retainer.
2. The rolling bearing cage rotational speed measurement method according to claim 1, characterized in that the relative position information is acquired by a high-speed camera.
3. Method for measuring the rotational speed of a rolling bearing cage according to claim 1, characterized in that the reference point is provided on the outer ring of the rolling bearing.
4. A rolling bearing cage rotational speed measurement device comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
1) acquiring the relative position information of the mark point relative to the reference point within the set time in the circumferential rotation process of the rolling bearing retainer; the marking point is a marking point arranged on the rolling bearing retainer; the reference point is a fixed reference point;
2) reading the relative distance between the marking point and the reference point according to the relative position information, and determining the motion track of the marking point according to the relative distance of the marking point relative to the reference point;
3) determining the motion period of the rolling bearing retainer according to the motion track;
4) and obtaining the actual rotating speed of the rolling bearing retainer according to the movement period of the rolling bearing retainer.
5. A rolling bearing cage rotational speed measurement system, comprising:
the acquisition device is used for acquiring the relative position information of the mark point relative to the reference point within the set time in the circumferential rotation process of the rolling bearing retainer; the mark point is a mark point arranged on the rolling bearing retainer; the reference point is a fixed reference point;
the processing device is used for reading the relative distance between the mark point and the reference point according to the acquired relative position information and determining the motion track of the mark point according to the relative distance of the mark point relative to the reference point; determining the motion period of the rolling bearing retainer according to the motion track; and then the actual rotating speed of the rolling bearing retainer is obtained according to the movement period of the rolling bearing retainer.
6. The rolling bearing cage rotational speed measurement system of claim 5, wherein the acquisition device is a high-speed camera.
7. Rolling bearing cage rotation speed measurement system according to claim 5, characterized in that said reference point is provided on the outer ring of the rolling bearing.
8. A method for measuring the slip rate of a rolling bearing retainer is characterized by comprising the following steps:
1) determining the rotating speed of an inner ring of the rolling bearing, setting a fixed reference point, and setting a mark point on a rolling bearing retainer;
2) acquiring the relative position information of the mark point relative to the reference point within the set time in the circumferential rotation process of the rolling bearing retainer;
3) reading the relative distance between the marking point and the reference point according to the relative position information, and determining the motion track of the marking point according to the relative distance of the marking point relative to the reference point;
4) determining the motion period of the rolling bearing retainer according to the motion track;
5) obtaining the actual rotating speed of the rolling bearing retainer according to the movement period of the rolling bearing retainer; obtaining the theoretical rotating speed of the rolling bearing retainer according to the rotating speed of the inner ring of the rolling bearing;
6) and obtaining the slip ratio of the rolling bearing according to the actual rotating speed of the rolling bearing retainer and the theoretical rotating speed of the rolling bearing retainer.
9. The rolling bearing cage slip rate measurement method according to claim 8, wherein the calculation process of the theoretical rotational speed of the rolling bearing cage is:
wherein n iscThe theoretical rotating speed of the rolling bearing retainer is r/min; n isiThe unit is r/min of the rotating speed of the inner ring of the rolling bearing; gamma is a dimensionless parameter of the rolling bearing, gamma is Dw×cosα/dm；DwIs the diameter of the rolling body in mm; alpha is the contact angle, unit degree; dmThe pitch circle diameter of the rolling bearing is unit mm.
Priority Applications (1)
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| CN111999059B (en) * | 2020-09-02 | 2022-06-28 | 洛阳轴承研究所有限公司 | Bearing is beaten slip rate test and is used device and use device's test system |
| CN112798813A (en) * | 2021-01-25 | 2021-05-14 | 河南科技大学 | Method for testing rotating speed of revolution driven member in pair-rolling friction pair |
| CN113465549B (en) * | 2021-06-30 | 2023-04-25 | 北华航天工业学院 | Vision-based contact angle measuring system and method for non-mark point bearing retainer |
| CN114062708A (en) * | 2021-11-23 | 2022-02-18 | 中国航发哈尔滨轴承有限公司 | Rotating speed non-contact measuring system and measuring method for rotating machinery |
| CN114738389B (en) * | 2022-03-29 | 2023-03-28 | 南京航空航天大学 | Intelligent bearing system for slip diagnosis and slip diagnosis prediction method |
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