DE112017006464T5 - Detection method and detection device for a rolling bearing - Google Patents

Abstract

A detection method and a rolling bearing detection apparatus, the method comprising: detecting a vibration signal in the operating condition of the rolling bearing (S11); performing repetitive sampling on the vibration signal to obtain sampling data (S12); the determination of a span in which reel bodies pass a defect on the bearing outer ring based on at least a part of the sampling data (S13); and determining the size of the defect location based on the span in which the roller bodies pass the defect on the bearing outer ring (S14). With the method and apparatus, without destroying the rolling bearing, the size of a defect on the outer ring of the rolling bearing can be determined, and they can be used for on-line detection.

Description

“ („Detektionsverfahren und Detektionsvorrichtung für ein Wälzlager“), wobei deren vollständiger Inhalt durch Querverweis in den vorliegenden Gegenstand mit einbezogen wird.The present application claims the priority of the Chinese patent application filed with the Chinese Patent Office on Dec. 23, 2016, with the application number 201611208133.3 and the invention name "

"(" Detection Method and Detection Device for Rolling Bearing "), the entire contents of which are incorporated by cross reference into the present subject matter.

Technical area

The present invention relates to the field of detection, and more particularly to a detection method and a rolling bearing detection apparatus.

General state of the art

Breakout of the bearing outer race is a common form of defect in bearings, and the detection solution of the prior art is the disassembly of the bearing and the subsequent determination of information on the size of the defect by a visual inspection.

The detection solution of the prior art has the following disadvantages: (1) it is a destructive test, according to which the tested bearing can not be reused; (2) It can not be used for on-line detection, and therefore it is not possible to detect the development state of the storage defects in real time.

Brief description of the invention

The technical problem to be solved by the present invention is the problem that the detection solution of the prior art is a destructive test and can not be used for on-line detection.

In order to achieve the above technical object, the embodiment of the present invention provides a rolling bearing detection method comprising: detecting a vibration signal in the operating condition of the rolling bearing; performing repetitive sampling on the vibration signal to obtain sampling data; the determination of a span in the reel body will pass a defect on the bearing outer ring based on at least a portion of the sampling data; and determining the size of the defect location based on the span in which the roller bodies pass the defect location on the bearing outer ring.

Optionally, the retry samples are retry samples for an equal angle range, wherein the retry samples are performed for the angle range based on the angular velocity of the bearing inner race, and the sampling point data obtained for the same angle range retry samples, which are obtained for rotation of the bearing inner race within a unit angle, are the same.

Optionally, the vibration signal corresponds to a vibration amplitude state of the reel body in a time domain.

Optionally, the determination of the span at which the roller bodies pass the flaw location on the bearing outer race, based on at least a portion of the sampling data, comprises: determining a starting point and an end point for passing the flaw location on the bearing outer race through the roller bodies based on at least a portion of the sampling data ; and determining the span in which the roller bodies pass the defect location on the bearing outer ring based on the starting point and the end point.

Optionally, according to the starting point and the end point, the period of time in which the roller bodies pass the fault location on the bearing outer ring comprises: determining the span in which each roller body passes the fault location on the bearing outer ring based on the starting point and end point for passing the defect location on the bearing outer ring through the plurality of reel bodies; the formation of the average of the spans in which the plurality of reel bodies respectively pass the flaw location on the bearing outer race to determine the span in which the reel bodies pass the flaw location on the bearing outer race.

Optionally, the starting point and the end point are determined based on the sampling points of the sampling data, the span being characterized by the number of sampling points between the starting point and the sampling points.

Optionally, determining the size of the defect location based on the span in which the roller bodies pass the defect location on the bearing outer ring comprises calculating the size of the defect location using the following formula: π * D _Or * P _BA / P _Circle ; where D _{Or is} the diameter of the outer race of the rolling bearing, P _{BA is} the span of the fault location and P _{Circle is} the total number of sampling points in a revolution of the bearing inner race.

Alternatively, the sampling data for one revolution of the bearing inner ring with the Number of roller bodies identical tip sections, each tip section corresponds to one of the reel body, which pass the defect.

Optionally, in each tip section corresponding to a reel body, the first sampling point with the greatest downward slope is the starting point for passing the defect location through the reel body, and the point following the starting point with the largest amplitude value is the end point for passing the defect location through the reel body.

Optionally, a cluster analysis is performed on at least a portion of the sampling data to determine, for each roll body, the starting point and end point for passing the fault location on the bearing outer ring.

Optionally, an acceleration sensor disposed on the bearing seat of the rolling bearing is used to detect the vibration signal.

Optionally, the detection of the vibration signal in the operating condition of the rolling bearing comprises: the detection of an initial vibration signal in the operating condition of the rolling bearing; and performing a noise reduction to the initial vibration signal to obtain the vibration signal.

Optionally, the noise reduction includes one or more forms of wavelet noise reduction and adaptive filtering.

Optionally, the sampling data, or at least a portion thereof, is sampling data for one or more rotations of the bearing inner race.

The embodiment of the present invention further provides a rolling bearing detection device, the rolling bearing comprising a bearing outer race, a bearing inner race and roller bodies disposed between the bearing outer race and the bearing inner race, and wherein the rolling bearing detection device comprises: a vibration signal detection unit that is suitable is to detect a vibration signal in the operating condition of the rolling bearing; a retry sampling unit adapted to perform replicate sampling to the vibration signal to obtain sampling data; a span determining unit adapted to determine, based on at least a portion of the sampling data, the span in which the roller bodies pass a defect location on the bearing outer ring; and a defect size determination unit adapted to determine the size of the defect location based on the span in which the roll bodies pass the defect location on the bearing outer ring.

Optionally, the retry samples are retry samples for an equal angle range, wherein the retry samples are performed for the angular range based on the angular velocity of the bearing inner race, and the sampling point data obtained for the same angle range retry samples obtained for rotation of the bearing inner race within a unit angle, are the same.

Optionally, the vibration signal corresponds to a vibration amplitude state of the reel body in a time domain.

Optionally, the span determining unit comprises: a daughter unit for determining the start and end points, which is adapted to determine, based on at least a part of the sampling data, the starting point and the end point for passing the defect location on the bearing outer ring through the roller bodies; and a tension determining daughter unit adapted to determine from the starting point and the end point the span in which the roller bodies pass the defect location on the bearing outer ring.

Optionally, the span determining unit comprises: a single roll body span determining unit adapted to determine from a plurality of roll bodies the span in which each roll body passes the defect location on the bearing outer ring based on the starting points and end points for passing the defect location on the bearing outer ring; and an average span determining unit adapted to average the span in which the plurality of roller bodies each pass the defect location on the bearing outer race to determine the span in which the roller bodies pass the fault location on the bearing outer race.

Optionally, the starting point and the end point are determined based on the sampling points of the sampling data, the span being characterized by the number of sampling points between the starting point and the sampling points.

Optionally, the defect size determination unit is suitable for calculating the size of the defect location by the following formula: π * D _Or * P _BA / P _Circle ; where Dor is the diameter of the outer ring of the rolling bearing, P _{BA is} the span of the defect location and P _{Circle is} the total number of sampling points in one revolution of the bearing inner race.

Alternatively, the sampling data for one revolution of the bearing inner ring with the Number of roller bodies identical tip sections, each tip section corresponds to one of the reel body, which pass the defect.

Optionally, in each tip section corresponding to a reel body, the first sampling point with the greatest downward slope is the starting point for passing the defect spot through a reel body, and the point following the starting point with the largest amplitude value is the end point for passing the defect spot through a reel body.

Optionally, the start and end point determination unit is adapted to perform cluster analysis on at least a portion of the sampling data to determine, for each roll body, the starting point and end point for passing the fault location on the bearing outer ring.

Optionally, the vibration signal detection unit is adapted to detect a vibration signal using an acceleration sensor disposed on the bearing seat of the rolling bearing.

Optionally, the vibration signal detection unit comprises: an initial vibration signal detection unit adapted to detect an initial vibration signal in the operating condition of the rolling bearing; and a noise reduction unit adapted to perform noise reduction to the initial vibration signal to obtain the vibration signal.

Optionally, the noise reduction includes one or more forms of wavelet noise reduction and adaptive filtering.

Optionally, the sampling data, or at least a portion thereof, is sampling data for one or more rotations of the bearing inner race.

Compared to the prior art, the technical solution of the embodiment of the present invention has the following advantages:

In the embodiment of the present invention, the detection of a vibration signal in the operating condition of a rolling bearing and the execution of repetitive sampling of the vibration signal, the range of a defect on the bearing outer ring determined based on at least a portion of the sampling, whereupon the size of the defect determined on the basis of the range of defects on the bearing outer ring can be. Thus, in the embodiment of the present invention, without destroying the rolling bearing, the size of a defect on the outer ring of the rolling bearing can be determined, and the detected vibration signal is a signal detected in the operating condition of the bearing and can therefore be used for on-line testing.

Further, repetition sampling is performed on the vibration signal for a same angular range, so that the sampling point data obtained for rotation of the bearing inner race within a unit angle are the same, and thus a proportional relationship can be formed directly between the sampling points from the sampling data and the size of the defect location. Since the margin of the defect is determined from the sampling data, the size of the defect can be determined by a simple calculation based on the margin of the defect and, further, the efficiency of calculating the size of the defect can be increased.

In addition, according to the determination of the span in which each roller body passes the defect location on the bearing outer ring, based on the starting points and end points for passing the defect location on the bearing outer ring by a plurality of roller bodies, from the margins in which the plurality of roller bodies each pass the defect location on the bearing outer ring, the average is formed to determine the span in which the roller bodies pass the defect location on the bearing outer ring. Thus, the vibration signals corresponding to the plurality of reel bodies can be fully used for the calculation of the size of the defect spot, and the accuracy of calculating the size of the defect spot can be increased.

list of figures

• 1 shows the flowchart of a detection method for a rolling bearing in the embodiment of the present invention.
• 2 Fig. 12 is a schematic diagram showing the waveform of an initial vibration signal in the embodiment of the present invention.
• 3 shows for the embodiment of the present invention, the flowchart of a method for determining a span in which the roller body pass a defect on the bearing outer ring.
• 4 shows the schematic representation of the force when passing a defect on the bearing outer ring by a roller body.
• 5 shows the schematic representation of the corresponding Probenahmedaten for a revolution of the bearing inner ring in the embodiment of the present invention.
• 6 shows the schematic representation of the sampling data for passing a defect point by a single reel body in the embodiment of the present invention.
• 7 shows the schematic representation of the structure of a detection device for a rolling bearing in the embodiment of the present invention.
• 8th shows the schematic representation of the structure of a concrete implementation of the span determination unit 73 in 7 ,

embodiments

As described above, the breakout of the bearing outer ring is a common form of defect in bearings, and the detection solution of the prior art is the disassembly of the bearing and the subsequent determination of information on the size of the defect spot by a visual inspection. The detection solution of the prior art has the following disadvantages: (1) it is a destructive test, according to which the tested bearing can not be reused; (2) It can not be used for online detection, and therefore it is not possible to detect the development state of the storage defects in real time.

In the embodiment of the present invention, the detection of a vibration signal in the operating condition of a rolling bearing and the execution of repetitive sampling of the vibration signal, the range of a defect on the bearing outer ring determined based on at least a portion of the sampling, whereupon the size of the defect determined on the basis of the range of defects on the bearing outer ring can be. Thus, in the embodiment of the present invention, without destroying the rolling bearing, the size of a defect on the outer ring of the rolling bearing can be determined, and the detected vibration signal is a signal detected in the operating condition of the bearing and can therefore be used for on-line testing.

In order to make the objects, features and advantages of the present invention even more clear and easier to understand, a detailed description will be given below in conjunction with the accompanying drawings to the specific embodiment of the present invention.

1 shows the flowchart of a detection method for a rolling bearing in the embodiment of the present invention, specifically the steps S11 to S14 can include:

In step S11 a vibration signal is detected in the operating condition of the rolling bearing.

In step S12 For example, repeat sampling is performed on the vibration signal to obtain sampling data.

In step S13 At least part of the sampling data is used to determine the span in which the roller bodies pass a defect on the bearing outer ring.

In step S14 The size of the defect is determined by the span in which the roller bodies pass the defect on the bearing outer ring.

At this time, the vibration signal may correspond to a vibration amplitude state of a reel body in a time range, and an acceleration sensor arranged on the bearing seat of the rolling bearing may be used for detection. In a concrete embodiment, noise reduction may be performed on the detected initial vibration signal to obtain the vibration signal. For example, the above noise reduction may be performed via wavelet noise reduction and / or adaptive filtering. The waveform of the initial vibration signal before noise reduction may be as in 2 shown, where the horizontal axis indicates the time and the vertical axis the amplitude.

In order to determine the range and size of the defect on the bearing outer ring even easier, in step S12 in 1 to the vibration signal repetitive sampling for a same angular range are performed. The retry sampling for an angular range may be performed based on the angular velocity of the movement of the bearing inner race, and the sampling point data obtained for the same angle range retry sampling, which are obtained for rotation of the bearing inner race within a unit angle, are equal.

Repeat sampling is performed on the vibration signal for a same angular range, so that the sampling point data obtained for rotation of the bearing inner race within a unit angle are the same, and thus a proportional relationship can be formed directly between the sampling points of the sampling data and the size of the defect location. Since the margin of the defect is determined from the sampling data, the size of the defect can be determined by a simple calculation based on the margin of the defect and, further, the efficiency of calculating the size of the defect can be increased.

It is clear that the repetitive sampling of the vibration signal can also be performed by other methods in which the margin of the defect corresponds to the sampling data and where the size of the defect is determined from the margin of the defect by a repeat sampling combined procedure for the sample Calculation is used.

As in 3 In a concrete embodiment, the following procedure can be used to determine the span in which the roller bodies pass a defect on the bearing outer ring:

In step S31 the starting point and the end point for the passage of the defect on the bearing outer ring are determined by the roller bodies on the basis of at least a part of the sampling data.

In step S32 Based on the starting point and the end point, the span in which the roller bodies pass the defect location on the bearing outer ring is determined.

When the roller bodies pass a defect on the bearing outer race, changes occur in the vibration amplitude of the time range. 4 shows the schematic representation of the force when passing a defect 42 at the bearing outer ring 41 through a reel body 43 , The force is different when passing the defect location on the bearing outer ring by a roller body and the failure point does not pass, and the amplitude of the sampling data can represent the starting point and the end point of the defect location on the bearing outer ring. Furthermore, based on the starting point and the end point, the span in which the roller bodies pass the defect location on the bearing outer ring can be determined.

A roller bearing usually comprises a plurality of roller bodies and each roller body, which passes a defect on the bearing outer ring, a change occurs in the vibration amplitude of the time domain, wherein the sampling data, or at least a part thereof, at least the corresponding sampling data for a reel body, may include the defect on the bearing outer ring.

The sampling data, or at least a part thereof, may also include the corresponding sampling data for a plurality of roller bodies passing the defect location on the bearing outer ring. In this case, based on the starting points and end points for passing the defect on the bearing outer ring by a plurality of reel body, the span in which each reel body passes the defect on the bearing outer ring, and it can from the margins, in which the plurality of reel body respectively the defect on Outer bearing ring pass, the average are formed to determine the span in which the roller bodies pass the defect point on the bearing outer ring. Thus, the vibration signals corresponding to the plurality of reel bodies can be fully used for the calculation of the size of the defect spot, and the accuracy of calculating the size of the defect spot can be increased.

As the inventors have established in tests, the sampling data for one revolution of the bearing inner race may include identical tip portions with the number of roller bodies, each tip portion corresponding to one of the roller bodies passing the defect location, as in the schematic illustration in FIG 5 shown. The horizontal axis indicates the number of sampling points and the vertical axis the vibration amplitude.

Therefore, the size of the defect location corresponding to this tip portion can be independently calculated from each tip portion corresponding to a roller body, respectively. In the embodiment of the present invention, at least a portion of the sampling data may include a tip portion.

The sampling data in the embodiment of the present invention may also include a plurality of tip portions. For example, they may include the respective tip portions for one or more revolutions of the bearing inner race.

For each tip section, the starting point and the end point for passing the fault location on the bearing outer race can be determined by the roller bodies, and concretely, by performing cluster analysis on each tip section, the starting point and end point for passing the fault location on the bearing outer race can be determined by each roller body.

For example, in each tip section corresponding to a reel body, the first sampling point with the greatest downward slope may be the starting point for passing the defect spot through the reel body, and the point following the starting point having the largest amplitude value may be the end point for passing the defect spot through a reel body ,

6 shows the schematic representation of the amplitude of a tip portion corresponding to a reel body, wherein point A is the first sampling point with the greatest downward slope, and may function as a starting point for passing the defect spot through a reel body, and point B is the point after the starting point having the largest amplitude value and may function as an end point for passing the defect spot through a reel body. If the size of the defect on the bearing outer ring is greater than the size of the reel body, usually point C occurs 6 on.

The goal in performing the above-mentioned cluster analysis on each peak section may be to determine the points A and B in FIG 6 be. It will be understood that other suitable methods may be used to determine the first sampling point having the greatest downward slope and the point after the starting point having the largest amplitude value to function as the starting point and end point for passing a defect location through the roll bodies can.

It will be appreciated that the starting point and the end point may be determined based on the sampling points of the sampling data, the span being characterized by the number of sampling points between the starting point and the sampling points. In a concrete execution, the size of the defect can be calculated using the following formula: $$\pi *D_{Or}*{\overline{P}}_{BA}/P_{Circle}$$

It is D _Or the diameter of the outer ring of the rolling bearing, P _BA is the span of the defect and P _Circle is the total number of sampling points in one revolution of the bearing inner ring.

In the above calculation method, the retry samples are retry samples for an equal angle range, and the margin of the defect location is indicated by the number of sampling points between the starting point and the sampling points. Therefore, with the proportion occupied by the margin of the defect point in the total number of sampling points for one revolution of the bearing inner race, the proportion occupied by the defect location of the bearing outer race on the circumference of the bearing outer race can be determined, and thus the size of the defect location can be determined.

In the embodiment of the present invention is determined by the detection of a vibration signal in the operating condition of a rolling bearing and performing repetition sampling of the vibration signal based on at least a portion of the sampling data, the margin of a defect on the bearing outer ring, whereupon the size of the defect determined on the basis of the range of defects on the bearing outer ring can be. Thus, in the embodiment of the present invention, without destroying the rolling bearing, the size of a defect on the outer ring of the rolling bearing can be determined; and the detected vibration signal is a signal detected in the operating condition of the bearing and therefore can be used for on-line testing.

• eine Vibrationssignalerfassungseinheit 71, die geeignet ist, um ein Vibrationssignal im Betriebszustand des Wälzlagers zu erfassen;
• eine Wiederholungsprobenahmeeinheit 72, die geeignet ist, um zu dem Vibrationssignal Wiederholungsprobenahmen durchzuführen, um Probenahmedaten zu erhalten;
• eine Spannenbestimmungseinheit 73, die geeignet ist, um anhand mindestens eines Teils der Probenahmedaten die Spanne, in der die Rollenkörper die Mängelstelle am Lageraußenring passieren, zu bestimmen;
• eine Mängelgrößenbestimmungseinheit 74, die geeignet ist, um anhand der Spanne, in der die Rollenkörper die Mängelstelle am Lageraußenring passieren, die Größe der Mängelstelle zu bestimmen.

The embodiment of the present invention also provides a detection device for a rolling bearing, wherein the rolling bearing comprises a bearing outer ring, a bearing inner ring and between the bearing outer ring and the bearing inner ring arranged roller body. As in 7 1, the rolling bearing detection device may include:

• a vibration signal detection unit 71 , which is suitable for detecting a vibration signal in the operating state of the rolling bearing;
• a repeat sampling unit 72 suitable for performing repetitive sampling of the vibration signal to obtain sampling data;
• a span determination unit 73 suitable for determining, at least part of the sampling data, the span in which the roller bodies pass the defect on the bearing outer ring;
• a defect size determination unit 74 , which is suitable for determining the size of the defect location on the basis of the span in which the roller bodies pass the defect location on the bearing outer ring.

Here, the vibration signal may correspond to a vibration amplitude state of the reel body in a time domain. The sampling data, or at least part of it, is sampling data for one or more rotations of the bearing inner ring. The vibration signal detection unit 71 is adapted to detect the vibration signal using a arranged on the bearing seat of the rolling bearing acceleration sensor.

In a particular embodiment, the retry samples may be repeat samples for an equal angle range, wherein the retry samples are performed for the angular range based on the angular velocity of the bearing inner race, and the sampling point data determined for the same angle range retry sampling corresponding to a bearing inner race rotation Unit angles are obtained are the same.

• eine Tochtereinheit zur Bestimmung des Anfangs- und Endpunktes 81, die geeignet ist, um anhand mindestens eines Teils der Probenahmedaten den Anfangspunkt und den Endpunkt für das Passieren einer Mängelstelle am Lageraußenring durch die Rollenkörper zu bestimmen.
• eine Spannenbestimmungs-Tochtereinheit 82, die geeignet ist, um anhand des Anfangspunkts und des Endpunkts die Spanne, in der die Rollenkörper die Mängelstelle am Lageraußenring passieren, zu bestimmen.

In the 8th and 7 shown span determination unit 73 may include:

• a daughter unit for determining the start and end points 81 suitable for determining, based on at least a part of the sampling data, the starting point and the end point for the passage of a defect location on the bearing outer ring through the roller bodies.
• a span determination daughter unit 82 which is suitable for determining, based on the starting point and the end point, the span in which the roller bodies pass the defect location on the bearing outer ring.

• eine Spannenbestimmungseinheit für einzelne Rollenkörper, die geeignet ist, anhand der Anfangspunkte und Endpunkte für das Passieren der Mängelstelle am Lageraußenring durch mehrere Rollenkörper, die Spanne, in der jeder Rollenkörper die Mängelstelle am Lageraußenring passiert, zu bestimmen.
• eine Durchschnittsspannenbestimmungseinheit, die geeignet ist, um aus den Spannen, in denen die mehreren Rollenkörper jeweils die Mängelstelle am Lageraußenring passieren, den Durchschnitt zu bilden, um die Spanne, in der die Rollenkörper die Mängelstelle am Lageraußenring passieren, zu bestimmen.

With regard to the number of reel bodies, the in 7 shown span determination unit 73 The following include:

• a single roll body tension determining unit adapted to determine, based on the starting points and end points for passing the defect location on the bearing outer ring by a plurality of roller bodies, the span in which each roller body passes the defect location on the bearing outer ring.
• an average span determining unit adapted to average the span in which the plurality of roller bodies each pass the defect location on the bearing outer race to determine the span in which the roller bodies pass the fault location on the bearing outer race.

After using the starting points and endpoints for passing the defect on the bearing outer ring by a plurality of reel body, the span in which each reel body passes the defect on the bearing outer ring, is determined from the margins in which the plurality of roller bodies each pass the defect on the bearing outer ring, the Average determined to determine the span in which the roller bodies pass the defect on the bearing outer ring. Thus, the vibration signals corresponding to the plurality of reel bodies can be fully used for the calculation of the size of the defect spot, and the accuracy of calculating the size of the defect spot can be increased.

In a concrete embodiment, the starting point and the end point are determined based on the sampling points of the sampling data, the span being characterized by the number of sampling points between the starting point and the sampling points.

In a concrete embodiment, the defect size determination unit 74 in 7 suitable for calculating the size of the defect with the following formula: $$\pi *D_{Or}*{\overline{P}}_{BA}/P_{Circle}$$

Where D _{Or is} the diameter of the outer ring of the rolling bearing, P _BA is the range of the defect location and P _Circle is the total number of sampling points in one revolution of the bearing inner ring.

In a specific embodiment, the sampling data for one revolution of the bearing inner ring with the number of roller bodies comprise identical tip sections, each tip section corresponding to one of the roller bodies passing the defect location.

In each tip portion corresponding to a reel body, the first sampling point having the largest downward slope may function as a starting point for passing the defect spot through the reel body, and the point after the starting point having the largest amplitude value may function as an end point for passing the defect spot through the reel body.

In a concrete embodiment, the unit is for determining the start and end points 81 in 8th suitable for performing cluster analysis on at least part of the sampling data to determine, for each roll body, the starting point and end point for passing the fault location on the bearing outer ring. In a concrete embodiment, the vibration signal detection unit 71 in 7 Comprising: an initial vibration signal detection unit adapted to detect an initial vibration signal in the operating condition of the rolling bearing; and a noise reduction unit adapted to perform noise reduction to the initial vibration signal to obtain the vibration signal. The noise reduction may include one or more forms of wavelet noise reduction and adaptive filtering.

The concrete implementation and the advantages of the detection device for a roller bearing in the embodiment of the present invention can be read in the detection process for a rolling bearing and are not listed here again.

One of ordinary skill in the art may understand that all steps or part of the steps in all of the methods of the above embodiment may be performed by a program giving instructions to appropriate hardware. This program can be stored on a computer readable storage medium, the Storage medium may include: ROM, RAM, magnetic storage, optical storage, etc.

Although the present invention has been disclosed as above, it is not limited thereto. Any person skilled in the art may, without departing from the spirit and scope of the present invention, make all sorts of changes and corrections. Therefore, the scope of the present invention is defined in the scope of the claims.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 201611208133 [0001]

Claims (28)

A rolling bearing detection method, wherein the rolling bearing comprises a bearing outer ring (41), a bearing inner race, and roller bodies (43) disposed between the outer bearing race (41) and the inner bearing race, characterized by comprising detecting a vibration signal in the operating state (S11 ) of the rolling bearing; performing repetitive sampling on the vibration signal (S12) to obtain sampling data; the determination of a span in which the roller bodies (43) pass a defect location (42) on the bearing outer ring (41) based on at least a part of the sampling data (S13); determining the size of the defect location (42) based on the span (S14) in which the roller bodies (43) pass the defect location (42) on the bearing outer ring (41). Detection method for a rolling bearing after Claim 1 characterized in that the retry samples are retry samples for a same angular range, the retry samples are performed for the angular range based on the angular velocity of movement of the bearing inner race, and the sampling point data determined by the same angle range retry sampling for a bearing inner ring rotation Unit angles are obtained are the same. Detection method for a rolling bearing after Claim 1 characterized in that the vibration signal corresponds to a vibration amplitude state of the reel body (43) in a time domain. Detection method for a rolling bearing after Claim 1 characterized in that the determination of the span in which the roller bodies (43) pass the defect location (42) on the bearing outer ring (41) based on at least a portion of the sampling data comprises: determining a starting point and an end point (S31) for passing the defect location (42) on the bearing outer ring (41) through the roller bodies (43) based on at least a portion of the sampling data; the determination of the span in which the reel bodies (43) pass the defect (42) on the bearing outer ring (41) from the starting point and the end point (S32). Detection method for a rolling bearing after Claim 4 characterized in that, according to the starting point and the end point, the period of time in which the reel bodies (43) pass the defect location (42) on the bearing outer ring (41) comprises: determining the span in which each reel body (43) the defect location (42) on the bearing outer ring (41), by means of the starting points and end points for passing the defect point (42) on the bearing outer ring (41) by a plurality of roller bodies (43); and forming the average of the spans in which the plurality of roller bodies (43) each pass the defect location (42) on the bearing outer ring (41) to the span in which the roller bodies (43) receive the defect location (42) on the bearing outer ring (41 ) happen to be determined. Detection method for a rolling bearing after Claim 4 , characterized in that the starting point and the end point are determined on the basis of the sampling points of the sampling data and the span is characterized by the number of sampling points between the starting point and the sampling points. Detection method for a rolling bearing after Claim 6 characterized in that the determination of the size of the defect location (42) based on the span in which the roller bodies (43) pass the defect location (42) on the bearing outer ring (41) calculates the size of the defect location (42) by the following formula includes: $$\pi *D_{Or}*{\overline{P}}_{BA}/P_{Circle}.$$

where D _{Or is} the diameter of the outer ring of the rolling bearing, P _{BA is} the span of the defect (42) and P _{Circle is} the total number of sampling points in one revolution of the bearing inner race. Detection method for a rolling bearing after Claim 4 , characterized in that the sampling data for one revolution of the bearing inner race with the number of roller bodies (43) comprise identical tip portions, each tip portion corresponding to one of the roller bodies (43) passing the defect location (42). Detection method for a rolling bearing after Claim 8 characterized in that, for each tip portion corresponding to a reel body (43), the first sampling point with the greatest downward slope is the starting point for passing the defect location (42) through the reel body (43) and the point after the starting point having the largest amplitude value the end point for passing the defect (42) through the reel body (43). Detection method for a rolling bearing after Claim 4 , characterized in that a cluster analysis is performed on at least a part of the sampling data to the starting point and determine the end point for passing the defect location (42) on the bearing outer ring (41) through each roller body (43). Detection method for a rolling bearing after Claim 1 characterized in that an acceleration sensor disposed on the bearing seat of the rolling bearing is used to detect the vibration signal. Detection method for a rolling bearing after Claim 1 , characterized in that the detection of the vibration signal in the operating condition of the rolling bearing comprises: the detection of an initial vibration signal in the operating condition of the rolling bearing; and performing a noise reduction to the initial vibration signal to obtain the vibration signal. Detection method for a rolling bearing after Claim 12 , characterized in that the noise reduction comprises one or more forms of wavelet noise reduction and adaptive filtering. Detection method for a rolling bearing according to one of Claims 1 to 13 , characterized in that the Probenahmedaten, or at least a part thereof, Probenahmedaten for one or more revolutions of the bearing inner ring. A rolling bearing detection apparatus, wherein the rolling bearing comprises a bearing outer ring (41), a bearing inner race, and roller bodies (43) disposed between the outer bearing race (41) and the inner bearing race, characterized by comprising: a vibration signal detection unit (71) suitable is to detect a vibration signal in the operating condition of the rolling bearing; a retry sampling unit (72) adapted to perform retry sampling to the vibration signal to obtain sampling data; a span determining unit (73) adapted to determine, based on at least a portion of the sampling data, the span in which the roller bodies (43) pass the defect location (42) on the bearing outer ring (41); a defect size determination unit (74) adapted to determine the size of the defect location (42) based on the span in which the roller bodies (43) pass the defect location (42) on the bearing outer ring (41). Detection device for a rolling bearing after Claim 15 characterized in that the retry samples are retry samples for a same angular range, the retry samples are performed for the angular range based on the angular velocity of movement of the bearing inner race, and the sampling point data determined by the same angle range retry sampling for a bearing inner ring rotation Unit angles are obtained are the same. Detection device for a rolling bearing after Claim 15 characterized in that the vibration signal corresponds to a vibration amplitude state of the reel body (43) in a time domain. Detection device for a rolling bearing after Claim 15 Characterized in that the range determining unit (73) comprising: a slave unit for determining the start and end point (81) is adapted to using at least a portion of the sampling data of the start point and the end point for the passage of the defect location (42) at the bearing outer ring (41) to be determined by the roller body (43); and a tension determining slave unit (82) adapted to determine from the starting point and the end point the span in which the roller bodies (43) pass the defect location (42) on the bearing outer ring (41). Detection device for a rolling bearing after Claim 18 characterized in that the span determining unit (73) comprises: a single roll body (43) tension determining unit (73) adapted for starting points and end points for passing the weak spot (42) on the bearing outer ring (41) through a plurality of roller bodies (43) to determine the span in which each roller body (43) passes the defect location (42) on the bearing outer ring (41); and an average span determining unit (73) adapted to average the span in which the roller bodies pass from the spans in which the plurality of roller bodies (43) respectively pass the defect location (42) on the bearing outer ring (41) (43) pass the defect (42) on the bearing outer ring (41). Detection device for a rolling bearing after Claim 18 , characterized in that the starting point and the end point are determined on the basis of the sampling points of the sampling data and the span is characterized by the number of sampling points between the starting point and the sampling points. Detection device for a rolling bearing after Claim 20 , characterized in that the Defect size determination unit (74) is adapted to calculate the size of the defect location (42) with the following formula: $$\pi *D_{Or}*{\overline{P}}_{BA}/P_{Circle};$$

where D _{Or is} the diameter of the outer ring of the rolling bearing, P _{BA is} the span of the defect (42) and P _{Circle is} the total number of sampling points in one revolution of the bearing inner race. Detection device for a rolling bearing after Claim 18 , characterized in that the sampling data for one revolution of the bearing inner race with the number of roller bodies (43) comprise identical tip portions, each tip portion corresponding to one of the roller bodies (43) passing the defect location (42). Detection device for a rolling bearing after Claim 22 characterized in that, for each tip portion corresponding to a reel body (43), the first sampling point with the greatest downward slope is the starting point for passing the defect location (42) through the reel body (43) and the point after the starting point having the largest amplitude value the end point for passing the defect (42) through the reel body (43). Detection device for a rolling bearing after Claim 18 characterized in that the start and end point determining unit is adapted to perform cluster analysis on at least a portion of the sampling data to provide, for each reel body (43), the starting point and end point for passing the fault location (42) on the bearing outer ring (42). 41). Detection device for a rolling bearing after Claim 15 characterized in that the vibration signal detection unit (71) is adapted to detect the vibration signal using an acceleration sensor disposed on the bearing seat of the rolling bearing. Detection device for a rolling bearing after Claim 15 characterized in that the vibration signal detection unit (71) comprises: an initial vibration signal detection unit (71) adapted to detect an initial vibration signal in the operating condition of the rolling bearing; and a noise reduction unit adapted to perform noise reduction to the initial vibration signal to obtain the vibration signal. Detection device for a rolling bearing after Claim 26 , characterized in that the noise reduction comprises one or more forms of wavelet noise reduction and adaptive filtering. Detection device for a rolling bearing according to one of Claims 15 to 27 , characterized in that the Probenahmedaten, or at least a part thereof, Probenahmedaten for one or more revolutions of the bearing inner ring.

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