CN116827055B - Motor structure - Google Patents
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Abstract
The invention relates to the technical field of motors, in particular to a motor structure, wherein a vibration sensor is arranged on a bearing bracket and a shell housing to perform vibration detection on a motor bearing in operation, a central control processor performs data processing, a vibration image is generated according to information transmitted by a vibration sensor group, and whether the bearing is abnormal in centering is judged according to the vibration image; the processor performs fault judgment according to the vibration image, marks the wave crest in the vibration image, periodically judges the wave crest in the vibration image, judges whether an abnormal wave crest appears, judges whether a motor shaft has faults or not, and filters part interference information through the marking and the periodic judgment of the wave crest in the vibration image so that a computer can identify the abnormal wave crest, further judges whether the bearing has the abnormality or not, the judgment result is more accurate and precise, the centering fault and the bearing fault can be found in time, prompt is timely, and the safety and the stability of the motor operation are improved.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor structure.
Background
The brushless direct current motor consists of a motor main body and a driver, is a typical electromechanical integrated product, is rapidly developed along with the increasing maturity and perfection of technology, and is widely applied to a plurality of fields such as aeromodelling, medical equipment, household appliances, electric vehicles and the like, but due to the operation characteristics of the motor, the motor shaft rotates at a high speed during the action of the motor, abrasion can be generated, and the thermal expansion effect generated by the high temperature during the operation of the motor can influence the centering of the bearing, and the bearing does not generate vibration during the rotation of the bearing or the failure of the motor shaft can cause the generation of higher harmonic waves, so that the service life and the operation stability of the motor are greatly influenced;
chinese patent publication No.: CN209963884U, which discloses the following, comprises a stator, a rotor, a motor shaft, a first bearing, and a second bearing; the rotor is fixedly connected with the motor shaft; the first bearing inner ring is fixed with the stator, and the outer ring is fixed with the rotor; the second bearing inner ring is fixed with the motor shaft, the outer ring is fixed with the stator, when the motor rotor is stressed, the rotor is supported by the outer ring of the first bearing, the outer ring of the first bearing transmits external force to the stator, the external load of the motor is mainly borne by the first bearing, and the second bearing and the motor shaft are only stressed by pulling force and very small torsion force.
However, the conventional technology has the following problems,
1. in the prior art, for a motor which is put into use, disassembly is needed when bearing centering detection is needed, the process is complex, an automatic and rapid detection mode for bearing centering is lacking,
2. in the prior art, there is a lack of related art for automatically determining motor component failure using vibration detection.
Disclosure of Invention
In order to solve the above problems, the present invention provides a motor structure, comprising: the motor comprises a rotor assembly, a first motor body formed by the stator assembly, a front bearing support and a rear bearing support, wherein the front bearing support is provided with at least three positioning columns in a surrounding mode, the rear bearing support is provided with matching columns with the same number as the positioning columns in a surrounding mode, and a bearing hole in the center of the front bearing support is coaxial with a bearing hole in the center of the rear bearing support through connection of the positioning columns and the matching columns;
the vibration sensor group comprises a first vibration sensor arranged on the rear bearing bracket and a second vibration sensor arranged on a shell housing of the motor so as to perform vibration detection on the motor shaft;
the central control processor is connected with the vibration sensor group and completes data exchange, generates a vibration image according to the information transmitted by the vibration sensor group, and judges whether the bearing is abnormal in centering or not according to the vibration image;
the medium processor performs fault judgment according to the vibration image, marks the wave crest in the vibration image, periodically judges the wave crest in the vibration image, judges whether an abnormal wave crest appears or not, and judges whether a motor shaft has faults or not;
a temperature sensor disposed on a surface of the rear bearing support;
the display module comprises an external display screen which is connected with the central control processor so as to receive information transmitted by the central control processor and display corresponding content.
Further, a motor shaft of the rotor assembly penetrates through bearing holes formed in the front bearing support and the rear bearing support, and an impeller and a diffuser are further arranged at one end of the bearing; the first motor is integrally provided with a surface shell outer cover for wrapping the first motor, the impeller and the diffuser
Further, the positioning column is connected with the matching column through a screw.
Further, the central control processor receives information sent by the vibration sensor group in real time, builds a first vibration image by taking the vibration amplitude as a y axis and the running time as an x axis according to the information sent by the first vibration sensor, and builds a second vibration image by taking the vibration amplitude as the y axis and the running time as the x axis according to the information sent by the second vibration sensor.
Further, the central control processor calculates vibration characterization parameters K corresponding to the first vibration image and the second vibration image according to the following formula,
wherein n represents the number of wave peaks in the vibration image, hi represents the height of the ith wave peak in the vibration image, delta H represents the average value of the wave peak heights in the vibration image, H0 represents the preset wave peak height average value comparison parameter, and alpha represents the preset conversion parameter;
the central control processor calculates a difference delta K of the vibration characterization parameters K corresponding to the first vibration image and the second vibration image,
when delta K is more than or equal to K2, the central control processor judges that the motor bearing is abnormal in centering and sends a signal to a display module;
when K1 is less than or equal to delta K and less than K2, the central control processor judges that the motor shaft is abnormal and needs to perform fault judgment;
when delta K is smaller than K1, the central control processor judges that the motor is abnormal;
wherein K1 represents a first vibration characterization comparison parameter and K2 represents a second vibration characterization comparison parameter.
Further, the central control processor performs fault judgment, calculates offset parameters H, H= (H0-delta H)/delta H, H0 corresponding to each wave crest in the first vibration image and the second vibration image, and marks the wave crest in the vibration image,
when H is more than 0 and less than or equal to H1, the central control processor eliminates the wave crest corresponding to the offset parameter H from the vibration image, and H1 represents a first preset offset comparison parameter;
after eliminating the wave peaks in the vibration image, the central control processor calculates processed offset parameters H ', H' = (H0-delta H ')/delta H', delta H 'corresponding to each wave peak, wherein the processed offset parameters H', H '= (H0-delta H')/delta H ', delta H' represent the average value of the heights of the residual wave peaks in the processed vibration image; and the peaks are marked, wherein,
when H 'is more than or equal to H2, marking the wave crest corresponding to the processed offset parameter H' by the central control processor;
further, the central control processor marks the wave crest in the vibration image and then periodically judges the wave crest, wherein the wave crest is marked by the central control processor;
dividing the vibration image into a plurality of sections by taking a motor shaft rotation period ts as a reference, searching marked wave peaks in each section, judging whether the distance between the marked wave peaks is in the range of ts-t1 to ts+t1, wherein t1 represents a preset section correction parameter;
if the number of the marked peaks is not less than the preset marking number N0 and the interval distance between the marked peaks is in the range of ts-t1 to ts+t1, the marked peaks are judged to be abnormal peaks.
Further, when the central control processor determines that abnormal wave peaks appear in the vibration images, if the first vibration image and the second vibration image both have abnormal wave peaks, the motor shaft is judged to be abnormal, and the abnormal wave peaks in the first vibration image and the second vibration image are marked and then displayed on the display module.
Further, an auxiliary fan is further arranged on one side of the rear bearing support, the central control processor receives information transmitted by the temperature sensor in real time, when vibration detection is carried out, the central control processor judges whether the auxiliary fan needs to be started and the power of the auxiliary fan needs to be started according to the temperature value C tested by the temperature sensor, wherein,
when C is more than or equal to C2, the central control processor judges that the power of the auxiliary fan needs to be adjusted, and increases the power to P0+P1×C/C2;
when C1 is less than or equal to C2, the central control processor does not need to adjust the power of the auxiliary fan;
when C is smaller than C1, the central control processor judges that the power of the auxiliary fan needs to be adjusted, and increases the power to P0-P1 xC/C1;
wherein, C1 represents a first temperature comparison parameter, C2 represents a second temperature comparison parameter, P0 represents a preset fan running power, and P1 represents a preset fan power adjustment parameter.
The first vibration sensor is the same as the second vibration sensor, and for any vibration sensor, the vibration sensor comprises a vibration detection element, a clamping fixture and a positioning plate which are arranged on a sliding rail, so that the vibration detection element moves to be in contact with a bearing for vibration detection.
Compared with the prior art, the vibration sensor is arranged on the bearing bracket and the surface shell housing to perform vibration detection on the motor bearing in operation, the central control processor is arranged to perform data processing, a vibration image is generated according to the information transmitted by the vibration sensor group, and whether the bearing is abnormal in centering is judged according to the vibration image; the processor performs fault judgment according to the vibration image, marks the wave crest in the vibration image, periodically judges the wave crest in the vibration image, judges whether an abnormal wave crest appears, judges whether the motor shaft has faults or not, and filters part interference information through the marking and the periodic judgment of the wave crest in the vibration image so that a computer can identify the abnormal wave crest, further judges whether the motor shaft has the abnormality or not, the judgment result is more accurate and precise, the centering fault and the motor shaft fault can be found in time, prompt is timely, and the safety and the stability of the operation of the motor are improved.
In particular, the vibration sensor groups are arranged to respectively detect two ends of the motor shaft and correspondingly generate corresponding vibration images, the vibration images take the amplitude and the time as references, the amplitude can represent the swinging floating of the bearing, the dispersion of wave peaks formed by the amplitude images and the height of the wave peaks are represented in the vibration characterization parameters K and K, the parameters are characterized in the swinging amplitude of the bearing, the centering abnormality is judged through the difference of the vibration characterization parameters K corresponding to the vibration images at the two ends of the motor shaft, the data is reliable, the detection result is accurate, the centering abnormality of the bearing can be conveniently detected, the prompt can be timely sent, and the safety and the stability of the motor operation are improved.
Particularly, the invention carries out fault judgment on the condition that the difference value of the vibration characterization parameter K in the vibration image is not obvious, eliminates wave crests, and in the condition, the vibration is influenced by various types, the wave crests on the corresponding vibration image are complex, and the method eliminates part of interference information, thereby facilitating computer judgment and processing, improving processing precision and accuracy and ensuring more reliable judgment results.
Particularly, the vibration image of the part of the wave crests is marked, the more prominent wave crests are marked, the part of the wave crests are periodically judged, in the actual situation, if a certain part of a motor shaft is damaged or one side of the motor shaft is severely worn, the vibration image of the motor shaft is periodically provided with the wave crests, and the situation is screened through the mode, so that a computer can identify the abnormal wave crests, and further the abnormal state of the motor shaft is identified.
In particular, the auxiliary fan is arranged on one side of the bearing bracket, so that heat can be dissipated on one side without the impeller, overheat operation of the motor is avoided, heat generated in the vibration detection process can be dissipated, and the motor is safer and more reliable.
Drawings
FIG. 1 is a schematic diagram of a motor structure according to an embodiment of the invention;
FIG. 2 is a schematic view of a rotor assembly according to an embodiment of the invention;
FIG. 3 is a schematic view of a stator assembly according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a vibration image of an embodiment of the invention;
fig. 5 is a schematic diagram of a vibration sensor according to an embodiment of the invention.
In the figure, 1: a face shell housing, 2: impeller, 3: diffuser, 4: front bearing support, 5: rotor assembly, 6: stator assembly, 7: rear bearing support, 8: rear bearing cover plate, 51: motor shaft, 52: rotor magnet, 53: copper ring, 54: front bearing, 55: rear bearing, 61: upper insulator, 62: silicon steel sheet, 63: lower insulator, 9: vibration detecting element, 10: locating plate, 11: slide rail, 12: and clamping the clamp.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, which is a schematic diagram of a motor structure according to an embodiment of the invention, the motor structure of the invention includes: the motor comprises a first motor body formed by a rotor assembly and a stator assembly, and a front bearing support 4 and a rear bearing support 7 for supporting the first motor body, wherein at least three positioning columns are arranged at the edge of the front bearing support 4, matching columns matched with the positioning columns in number are arranged around the edge of the rear bearing support 7, so that a bearing hole in the center of the front bearing support 4 is coaxial with a bearing hole in the center of the rear bearing support 7 through connection of the positioning columns and the matching columns, a rear bearing cover plate 8 is further arranged on the rear bearing support, and the rear bearing cover plate is of a hollowed structure;
a vibration sensor group including a first vibration sensor provided on the rear bearing bracket 7 and a second vibration sensor provided on the face-piece housing 1 of the motor to perform vibration detection of the motor shaft 51;
the central control processor is connected with the vibration sensor group and completes data exchange, generates a vibration image according to the information transmitted by the vibration sensor group, and judges whether the bearing is abnormal in centering or not according to the vibration image;
the middle processor performs fault judgment according to the vibration image, marks the wave crest in the vibration image, periodically judges the wave crest in the vibration image, judges whether an abnormal wave crest occurs or not, and judges whether the motor shaft 51 has a fault or not;
a temperature sensor provided on the surface of the rear bearing bracket 7;
the display module comprises an external display screen which is connected with the central control processor so as to receive information transmitted by the central control processor and display corresponding content.
Specifically, as shown in fig. 1, the bearing of the first motor passes through bearing holes formed in the front bearing support 4 and the rear bearing support 7, and one end of the bearing is further provided with an impeller 2 and a diffuser 3; the first motor is integrally provided with a face shell housing 1 to enclose the first motor, the impeller 2 and the diffuser 3.
Specifically, referring to fig. 2, the rotor assembly includes a motor shaft 51, rotor magnets 52 disposed on the motor shaft 51, copper rings 53 disposed at both ends of the motor shaft 51, and front and rear bearings 54 and 55 for supporting the motor shaft 51;
specifically, referring to fig. 3, the stator assembly includes an upper insulator 61, a lower insulator 63, and a hollow silicon steel sheet 62, wherein the upper insulator 61 and the lower insulator 63 are fixedly connected to a whole, and the hollow silicon steel sheet 62 is clamped therebetween.
Specifically, the positioning column is connected with the matching column through a screw.
Specifically, referring to fig. 4, the central processor receives information sent by the vibration sensor group in real time, and constructs a first vibration image with a vibration amplitude as a y-axis and a running time as an x-axis according to the information sent by the first vibration sensor, and constructs a second vibration image with the vibration amplitude as the y-axis and the running time as the x-axis according to the information sent by the second vibration sensor.
Specifically, the central control processor calculates vibration characterization parameters K corresponding to the first vibration image and the second vibration image according to the following formula,
wherein n represents the number of wave peaks in the vibration image, hi represents the height of the ith wave peak in the vibration image, delta H represents the average value of the wave peak heights in the vibration image, H0 represents the preset wave peak height average value comparison parameter, and alpha represents the preset conversion parameter;
the central control processor calculates a difference delta K of the vibration characterization parameters K corresponding to the first vibration image and the second vibration image,
when delta K is more than or equal to K2, the central control processor judges that the motor shaft 51 is abnormal in bearing pair and sends a signal to a display module;
when K1 is less than or equal to delta K and less than K2, the central control processor judges that the motor shaft 51 is abnormal and needs to perform fault judgment;
when delta K is smaller than K1, the central control processor judges that the motor is abnormal;
wherein K1 represents a first vibration characterization comparison parameter and K2 represents a second vibration characterization comparison parameter.
Specifically, the vibration sensor groups are arranged to respectively detect two ends of the motor shaft and correspondingly generate corresponding vibration images, the vibration images take the amplitude and the time as references, the amplitude can represent the swinging floating of the bearing, the dispersion of wave peaks formed by the amplitude images and the height of the wave peaks are represented in the vibration characterization parameters K and K, the parameters are characterized in the swinging amplitude of the bearing, the centering abnormality is judged through the difference of the vibration characterization parameters K corresponding to the vibration images at the two ends of the motor shaft, the data is reliable, the detection result is accurate, the centering abnormality of the bearing can be conveniently detected, the prompt can be timely sent, and the safety and the stability of the motor operation are improved.
Specifically, the central control processor performs fault judgment, calculates offset parameters H, H= (H0-delta H)/delta H, H0 corresponding to each wave crest in the first vibration image and the second vibration image, and marks the wave crest in the vibration image,
when H is more than 0 and less than or equal to H1, the central control processor eliminates the wave crest corresponding to the offset parameter H from the vibration image, and H1 represents a first preset offset comparison parameter;
after eliminating the wave peaks in the vibration image, the central control processor calculates processed offset parameters H ', H' = (H0-delta H ')/delta H', delta H 'corresponding to each wave peak, wherein the processed offset parameters H', H '= (H0-delta H')/delta H ', delta H' represent the average value of the heights of the residual wave peaks in the processed vibration image; and the peaks are marked, wherein,
and when H 'is not less than H2, marking the peak corresponding to the processed offset parameter H' by the central control processor.
Specifically, the invention carries out fault judgment on the condition that the difference value of the vibration characterization parameter K in the vibration image is not obvious, eliminates wave crests, and in the condition, the vibration is influenced by various types, the wave crests on the corresponding vibration image are complex, and the method eliminates part of interference information, thereby facilitating computer judgment processing, improving processing precision and accuracy and ensuring more reliable judgment results.
Specifically, the central control processor marks the wave crest in the vibration image and then periodically judges the wave crest, wherein the wave crest is marked by the central control processor;
dividing the vibration image into a plurality of sections by taking the rotation period ts of the motor shaft 51 as a reference, searching marked wave peaks in each section, and judging whether the distance between the marked wave peaks is in the range of ts-t1 to ts+t1, wherein t1 represents a preset section correction parameter;
if the number of the marked peaks is not less than the preset marking number N0 and the interval distance between the marked peaks is in the range of ts-t1 to ts+t1, the marked peaks are judged to be abnormal peaks.
Specifically, the method and the device perform marking processing on the vibration image with partial peaks removed, mark the more prominent peaks, and periodically judge the partial peaks, in the actual situation, if a certain part of a motor shaft is damaged or one side of the motor shaft is severely worn, the vibration image of the motor shaft is subjected to periodic peaks, and the situation is screened in the mode, so that a computer can identify the abnormal peaks and further identify the abnormal state of the motor shaft.
Specifically, when the central control processor determines that an abnormal peak appears in the vibration image, if the first vibration image and the second vibration image both have abnormal peaks, it is determined that the motor shaft 51 is abnormal, and the abnormal peaks in the first vibration image and the second vibration image are marked and then displayed on the display module.
Specifically, an auxiliary fan is further arranged on one side of the rear bearing support 7, the central control processor receives information transmitted by the temperature sensor in real time, when vibration detection is performed, the central control processor judges whether the auxiliary fan needs to be started and the power of the auxiliary fan needs to be started according to the temperature value C tested by the temperature sensor, wherein,
when C is more than or equal to C2, the central control processor judges that the power of the auxiliary fan needs to be adjusted, and increases the power to P0+P1×C/C2;
when C1 is less than or equal to C2, the central control processor does not need to adjust the power of the auxiliary fan;
when C is smaller than C1, the central control processor judges that the power of the auxiliary fan needs to be adjusted, and increases the power to P0-P1 xC/C1;
wherein, C1 represents a first temperature comparison parameter, C2 represents a second temperature comparison parameter, P0 represents a preset fan running power, and P1 represents a preset fan power adjustment parameter.
Specifically, the specific structure of the auxiliary fan is not limited, and it may be a fan disposed outside the rear bearing bracket to assist in heat dissipation.
Specifically, referring to fig. 5, the first vibration sensor is the same as the second vibration sensor, for any vibration sensor, the vibration sensor includes a vibration detecting element 9 disposed on a sliding rail 11, a clamping fixture 12 and a positioning plate 10, so that the vibration detecting element moves to contact with a bearing to perform vibration detection, the clamping fixture is used for clamping the vibration detecting element left and right, the positioning plate 10 is disposed on the sliding rail, a positioning block is disposed at the end of the sliding rail, a thread is disposed in the positioning block, a push rod is disposed to pass through the thread, and the positioning plate is pushed by rotating the push rod, so that a person skilled in the art can change the positions of the first vibration sensor and the second vibration sensor corresponding to a bearing back seat and a housing cover, and only need to perform vibration detection on a motor shaft.
Specifically, the present invention is not limited to the specific structure of the vibration detecting element, and is a conventional technology, and may be a contact type vibration detecting element, and those skilled in the art may perform equivalent replacement according to specific needs.
Specifically, the invention does not limit the specific structure of the central control processor and the display module, and the central control processor can be in the form of an external computer or a control chip arranged on a motor, so that only data processing and data transmission can be completed, and the display module can be an external display screen or a display screen arranged on the motor, and only signals of the central control processor can be received for corresponding display.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (8)
1. An electric machine structure comprising: the motor is characterized by further comprising a front bearing support and a rear bearing support for supporting the whole motor, wherein at least three positioning columns are arranged around the edge of the front bearing support, and matching columns with the same number as the positioning columns are arranged around the edge of the rear bearing support, so that bearing holes in the center of the front bearing support are coaxial with bearing holes in the center of the rear bearing support through connection of the positioning columns and the matching columns;
the vibration sensor group comprises a first vibration sensor arranged on the rear bearing bracket and a second vibration sensor arranged on a shell housing of the motor so as to perform vibration detection on the motor shaft;
the central control processor is connected with the vibration sensor group and completes data exchange, generates a vibration image according to the information transmitted by the vibration sensor group, and judges whether the bearing is abnormal in centering or not according to the vibration image;
the central control processor performs fault judgment according to the vibration image, marks the wave crest in the vibration image, periodically judges the wave crest in the vibration image, judges whether an abnormal wave crest occurs or not, and judges whether a motor shaft has faults or not;
a temperature sensor disposed on a surface of the rear bearing support;
the display module comprises an external display screen which is connected with the central control processor to receive information transmitted by the central control processor and display corresponding content;
the central control processor receives information sent by the vibration sensor group in real time, builds a first vibration image by taking the vibration amplitude as a y axis according to the information sent by the first vibration sensor, and builds a second vibration image by taking the vibration amplitude as a y axis according to the information sent by the second vibration sensor and taking the running time as an x axis;
the central control processor calculates vibration characterization parameters K corresponding to the first vibration image and the second vibration image according to the following formula,
wherein n represents the number of wave peaks in the vibration image, hi represents the height of the ith wave peak in the vibration image, delta H represents the average value of the wave peak heights in the vibration image, H0 represents the preset wave peak height average value comparison parameter, and alpha represents the preset conversion parameter;
the central control processor calculates a difference delta K of the vibration characterization parameters K corresponding to the first vibration image and the second vibration image,
when the delta K is more than or equal to K2, the central control processor judges that the centering of the motor bearing is abnormal and sends a signal to the display module;
when K1 is less than or equal to delta K and less than K2, the central control processor judges that the motor shaft is abnormal and needs to perform fault judgment;
when delta K is smaller than K1, the central control processor judges that the motor is abnormal;
wherein K1 represents a first vibration characterization comparison parameter and K2 represents a second vibration characterization comparison parameter.
2. The motor structure according to claim 1, wherein a motor shaft of the rotor assembly passes through bearing holes provided in the front bearing bracket and the rear bearing bracket, and one end of the motor shaft is further provided with an impeller and a diffuser; the first motor is integrally provided with a surface shell outer cover so as to wrap the first motor, the impeller and the diffuser.
3. The motor structure of claim 1, wherein the positioning posts are screwed to the mating posts.
4. The motor structure according to claim 1, wherein the central control processor performs failure determination, calculates offset parameters H, h= (h0- Δh)/Δh, H0 corresponding to respective peaks in the first vibration image and the second vibration image, and performs a marking process on the peaks in the vibration images,
when H is more than 0 and less than or equal to H1, the central control processor eliminates the wave crest corresponding to the offset parameter H from the vibration image, and H1 represents a first preset offset comparison parameter;
after eliminating the wave peaks in the vibration image, the central control processor calculates processed offset parameters H ', H' = (H0-delta H ')/delta H', delta H 'corresponding to each wave peak, wherein the processed offset parameters H', H '= (H0-delta H')/delta H ', delta H' represent the average value of the heights of the residual wave peaks in the processed vibration image; and the peaks are marked, wherein,
and when H 'is not less than H2, marking the peak corresponding to the processed offset parameter H' by the central control processor.
5. The motor structure of claim 4, wherein the central control processor marks peaks in the vibration image and then makes a periodic decision, wherein;
dividing the vibration image into a plurality of sections by taking a motor shaft rotation period ts as a reference, searching marked wave peaks in each section, judging whether the distance between the marked wave peaks is in the range of ts-t1 to ts+t1, wherein t1 represents a preset section correction parameter;
if the number of the marked peaks is not less than the preset marking number N0 and the interval distance between the marked peaks is in the range of ts-t1 to ts+t1, the marked peaks are judged to be abnormal peaks.
6. The motor structure of claim 5, wherein when the central control processor determines that an abnormal peak occurs in the vibration image, if the first vibration image and the second vibration image both have abnormal peaks, the central control processor determines that the motor shaft is abnormal, and marks the abnormal peaks in the first vibration image and the second vibration image and displays the marked abnormal peaks on the display module.
7. The motor structure according to claim 1, wherein an auxiliary fan is further provided at one side of the rear bearing support, the central control processor receives information transmitted by the temperature sensor in real time, and when vibration detection is performed, the central control processor determines power for starting the auxiliary fan according to a temperature value C tested by the temperature sensor, wherein,
when C is more than or equal to C2, the central control processor judges that the power of the auxiliary fan needs to be adjusted, and increases the power to P0+P1×C/C2;
when C1 is less than or equal to C2, the central control processor does not need to adjust the power of the auxiliary fan;
when C is smaller than C1, the central control processor judges that the power of the auxiliary fan needs to be adjusted, and increases the power to P0-P1 xC/C1;
wherein, C1 represents a first temperature comparison parameter, C2 represents a second temperature comparison parameter, P0 represents a preset fan running power, and P1 represents a preset fan power adjustment parameter.
8. The motor structure according to claim 1, wherein the first vibration sensor is identical to the second vibration sensor, and for any one of the vibration sensors, it includes a vibration detecting element provided on a slide rail, a holding jig, and a positioning plate so that the vibration detecting element moves in contact with a bearing for vibration detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211101127.3A CN116827055B (en) | 2022-09-09 | 2022-09-09 | Motor structure |
Applications Claiming Priority (1)
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