CN102788014B - Gear oil pump tooth surface wearing fault diagnosis device and method - Google Patents
Gear oil pump tooth surface wearing fault diagnosis device and method Download PDFInfo
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- CN102788014B CN102788014B CN201210279126.8A CN201210279126A CN102788014B CN 102788014 B CN102788014 B CN 102788014B CN 201210279126 A CN201210279126 A CN 201210279126A CN 102788014 B CN102788014 B CN 102788014B
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Abstract
The invention relates to a gear oil pump tooth surface wearing fault diagnosis device and a method. A gear oil pump is connected with a power unit through a power take-off shaft. The fault diagnosis device comprises a test part noise sensor, an interfering noise sensor, a signal collector connected with the noise sensors, a tooth surface wear-out fault parameter database, and an electric control unit respectively connected with the signal collector and the tooth surface wear-out fault parameter database. The electric control unit comprises a signal processing and parameter matching module and an alarm module. The signal processing and parameter matching module reads the tooth surface wear-out fault parameters from the database, processes the noise signals collected by the signal collector, and conducts tooth surface wear-out fault parameter matching. The alarm module gives an alarm according to the determined tooth surface wear-out fault. According to the gear oil pump tooth surface wearing fault diagnosis device, the parameter features which correspond to the tooth surface wear-out fault and are related with the noise signals are taken as the diagnosis basis for diagnosing the tooth surface wear-out fault, and precise fault diagnosis of the tooth surface wear-out fault can be realized without carrying out direct measurement to the interior of the oil pump.
Description
Technical field
The present invention relates to fault diagnosis technology, particularly relate to a kind of gear oil pump tooth surface abrasion trouble-shooter and method.
Background technique
For the drive form of the oil hydraulic pump of crane, the oil hydraulic pump (such as simply connected gear oil pump or nest oil pump) of crane drives running by other power units (such as motor), and four-gear block oil pump is connected with power taking axle by fixing device.When the operation of needs oil pump, power taking axle is articulated on four-gear block oil pump, drives four-gear block operation of oil pump by power taking axle, and by the combination of clutch with disconnect the working condition controlling four-gear block oil pump.Power unit has outside housing, and power unit also has the cooling mechanism arranged in the one end away from power taking axle.
Gear oil pump may produce because the flank of tooth collides the noise formed when running up, this noise is through looking into mainly because pump internal gear occurs that wearing and tearing cause, but because tooth surface abrasion occurs in oil pump inside, directly cannot measure, the running noise of pump can only be listened to carry out breakdown judge by experience with operator at present.And tooth surface abrasion may by various foozle, the factors such as such as gear surface roughness, tooth profile error and heat treatment deformation cause, and fault mode is complicated, therefore only listen attentively to the judgement validity of carrying out fault mode by people's ear lower.
Summary of the invention
The object of the invention is to propose a kind of gear oil pump tooth surface abrasion trouble-shooter and method, can more accurately to the tooth surface abrasion diagnosing malfunction of gear oil pump.
For achieving the above object, the invention provides a kind of gear oil pump tooth surface abrasion trouble-shooter, described gear oil pump is connected with power unit by power taking axle, and wherein said gear oil pump tooth surface abrasion trouble-shooter comprises:
Be arranged in the unit under test noise transducer around described gear oil pump;
Be arranged in the interference noise sensor around described power unit;
The signal picker be connected with interference noise sensor with described unit under test noise transducer respectively;
Record the tooth surface abrasion fault parameter database of the tooth surface abrasion fault parameter measured in advance;
The ECU (Electrical Control Unit) be connected with tooth surface abrasion fault parameter database with described signal picker respectively;
Described ECU (Electrical Control Unit) comprises:
Read tooth surface abrasion fault parameter from described tooth surface abrasion fault parameter database, and the noise signal that described signal picker collects is processed and carries out signal transacting and the parameter matching module of tooth surface abrasion fault parameter coupling;
The Alarm module of alarm operation is performed according to the tooth surface abrasion fault determined.
Further, described interference noise sensor comprises the power unit heat radiation noise transducer around the cooling mechanism being arranged on described power unit and is arranged on described power taking axial power taking axle noise transducer.
Further, described ECU (Electrical Control Unit) also comprises:
Fault test module, by removing interference noise process and Analysis of failure frequency determination tooth surface abrasion noise signal, corresponding tooth surface abrasion noise frequency, sound pressure level and loudness level, and as tooth surface abrasion fault parameter stored in described tooth surface abrasion fault parameter database.
Further, at described power unit, be provided with sound-absorbing partition between gear oil pump and power taking axle or sound absorption is cotton.
For achieving the above object, the invention provides a kind of gear oil pump tooth surface abrasion method for diagnosing faults based on aforesaid gears oil pump tooth surface abrasion trouble-shooter, comprising:
Under the mode of operation of described gear oil pump, the noise signal that ECU (Electrical Control Unit) Received signal strength collector collects from unit under test noise transducer and interference noise sensor;
Described ECU (Electrical Control Unit) carries out the process of removal interfering noise signal to the noise signal received;
Described ECU (Electrical Control Unit) carries out Analysis of failure frequency to the noise signal through removing interfering noise signal process, determines the noise frequency corresponding to noise signal of described gear oil pump reality, sound pressure level and loudness level;
Described ECU (Electrical Control Unit) reads tooth surface abrasion fault parameter from tooth surface abrasion fault parameter database, and is mated with the sound pressure level determined and loudness level by described tooth surface abrasion fault parameter, determines whether tooth surface abrasion fault occurs;
If determine to occur tooth surface abrasion fault, then perform alarm operation.
Further, described interference noise sensor comprises the power unit heat radiation noise transducer around the cooling mechanism being arranged on described power unit and is arranged on described power taking axial power taking axle noise transducer.
Further, also comprise:
Under the fault test mode of described gear oil pump, the noise signal that ECU (Electrical Control Unit) Received signal strength collector collects from unit under test noise transducer, power unit heat radiation noise transducer and power taking axle noise transducer;
The described ECU (Electrical Control Unit) frequency order corresponding respectively according to the noise signal received and the cooling mechanism of predetermined described power unit, described power taking axle and described gear oil pump carries out the process of removal interfering noise signal;
Described ECU (Electrical Control Unit) carries out Analysis of failure frequency to the tooth surface abrasion noise signal through removing interfering noise signal process, determines tooth surface abrasion noise frequency, sound pressure level and the loudness level corresponding to tooth surface abrasion noise signal of described gear oil pump;
Described ECU (Electrical Control Unit) using described tooth surface abrasion noise signal, corresponding tooth surface abrasion noise frequency, sound pressure level and loudness level as tooth surface abrasion fault parameter stored in described tooth surface abrasion fault parameter database.
Further, the frequency order that the cooling mechanism of described power unit, described power taking axle and described gear oil pump are corresponding is respectively determined by standard shaft rotating speed and the number of teeth.
Further, the operation of described removal interfering noise signal process comprises:
Fourier transform is carried out to the noise signal received, obtains corresponding noise frequency figure;
The frequency order corresponding respectively according to the cooling mechanism of predetermined described power unit, described power taking axle and described gear oil pump determines the peak value corresponding to interference noise in described noise frequency figure, and the removal of interfering noise signal is carried out according to the peak value determined, obtain the actual noise signal of gear oil pump.
Further, the sound pressure level that described tooth surface abrasion noise signal is corresponding is determined by the ratio of the tested acoustic pressure determined according to described tooth surface abrasion noise signal with the reference acoustic pressure preset; Loudness level corresponding to described tooth surface abrasion noise signal is determined in conjunction with contour of equal loudness by tooth surface abrasion noise frequency corresponding to described tooth surface abrasion noise signal and sound pressure level.
Based on technique scheme, the present invention monitors the noise around gear oil pump and power unit, and process according to the noise signal monitored, to mate with the tooth surface abrasion fault parameter prestored in tooth surface abrasion fault parameter database, to determine whether occur tooth surface abrasion fault in current work processes.The present invention utilizes the parameter attribute relevant with noise signal corresponding to tooth surface abrasion fault as the diagnosis basis of tooth surface abrasion fault, does not need directly to measure oil pump inside, realizes accurate tooth surface abrasion fault diagnosis.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of an embodiment of gear oil pump tooth surface abrasion trouble-shooter of the present invention.
Fig. 2 is the schematic flow sheet of an embodiment of gear oil pump tooth surface abrasion method for diagnosing faults of the present invention.
Fig. 3 is the schematic flow sheet in another embodiment of gear oil pump tooth surface abrasion method for diagnosing faults of the present invention under fault test mode.
Embodiment
Below by drawings and Examples, technological scheme of the present invention is described in further detail.
As shown in Figure 1, be the structural representation of an embodiment of gear oil pump tooth surface abrasion trouble-shooter of the present invention.In the present embodiment, gear oil pump 3 is connected with power unit 1 by power taking axle 2, and wherein power unit 1 has cooling mechanism 7.Gear oil pump tooth surface abrasion trouble-shooter comprises multiple sensor, wherein gear oil pump 3 is as unit under test, the noise transducer be arranged in around gear oil pump 3 is called as unit under test noise transducer s1, and other are arranged in the noise transducer around power unit, due to gather be compared to the noise of gear oil pump 3 outside interference noise, therefore in this paper, be called as interference noise sensor.
In a specific embodiment, interference noise sensor can comprise the power unit heat radiation noise transducer s2 around the cooling mechanism 7 being arranged on power unit 1 and be arranged on power taking axle noise transducer s3(around power taking axle 2 as shown in Figure 1).
Noise transducer generally will be arranged on the position of the certain distance (such as 30cm, 35cm, 40cm etc.) of UUT itself, and avoid as far as possible external wind to, and can not directly be attached in UUT.
These sensors described above constitute the signal acquiring system of gear oil pump tooth surface abrasion mode fault diagnosis apparatus of the present invention, designer can carry out accommodation, to meet the fault diagnosis needs under dissimilar equipment, different operating mode to sensor present position, sensor type, number of probes etc. wherein according to actual needs.
These signals all can be gathered by signal picker 4, and the noise signal that unit under test noise transducer s1 and interference noise sensor (the power unit heat radiation noise transducer s2 and power taking axle noise transducer s3 in such as Fig. 1) are monitored as can see from Figure 1 has all been input to signal picker 4.
Trouble-shooter of the present invention is except sensor and signal picker, also comprise tooth surface abrasion fault parameter database and ECU (Electrical Control Unit), wherein tooth surface abrasion fault parameter database is used for recording the tooth surface abrasion fault parameter measured in advance, and ECU (Electrical Control Unit) comprises signal transacting and parameter matching module and Alarm module.Signal transacting and parameter matching module can read tooth surface abrasion fault parameter from tooth surface abrasion fault parameter database, and process the noise signal that signal picker collects and carry out tooth surface abrasion fault parameter coupling.Alarm module can perform alarm operation according to the tooth surface abrasion fault determined.
On hardware implementing, Fig. 1 gives a kind of way of realization, and automatically controlled disposable plates 5 is integrated with the function of tooth surface abrasion fault parameter database and signal transacting and parameter matching module, and the function of Alarm module is responsible for by alarming processing plate 6.Alarming processing plate 6 can remind operator by the alarm form such as sound, light, or transmits warning message by the mode of wire/wireless and know to enterprising the working of terminal of system platform or operator.
In order to make the diagnosis of tooth surface abrasion fault more accurate, tooth surface abrasion fault parameter in its tooth surface abrasion fault parameter database should be more typical, the actual conditions of noise-related parameter under tooth surface abrasion can be embodied, in order to such tooth surface abrasion fault parameter can be obtained, in another embodiment of gear oil pump tooth surface abrasion trouble-shooter of the present invention, fault test module can be set up in ECU (Electrical Control Unit), this fault test module can cross the process of removal interference noise and Analysis of failure frequency determination tooth surface abrasion noise signal, corresponding tooth surface abrasion noise frequency, sound pressure level and loudness level (concrete process and computational process are see method for diagnosing faults embodiment hereinafter), and using obtain above-mentioned numerical value as tooth surface abrasion fault parameter stored in described tooth surface abrasion fault parameter database.
No matter be fault test mode or mode of operation, sensor noise is easy to the impact of other noises be subject to around unit under test, and then bring certain interference to measurement signal, in order to reduce this interference as far as possible, can at power unit 1, sound-absorbing partition or the cotton (not shown) that absorbs sound are set between gear oil pump 3 and power taking axle 2.
Embodiment below based on foregoing various gear oil pump tooth surface abrasion trouble-shooter is described gear oil pump tooth surface abrasion method for diagnosing faults of the present invention.
As shown in Figure 2, be the schematic flow sheet of an embodiment of gear oil pump tooth surface abrasion method for diagnosing faults of the present invention.In the present embodiment, fault diagnosis flow scheme comprises:
Step 101, under the mode of operation of described gear oil pump, the noise signal that ECU (Electrical Control Unit) Received signal strength collector collects from unit under test noise transducer and interference noise sensor;
Step 102, described ECU (Electrical Control Unit) carry out the process of removal interfering noise signal to the noise signal received;
Step 103, described ECU (Electrical Control Unit) carry out Analysis of failure frequency to the noise signal through removing interfering noise signal process, determine the noise frequency corresponding to noise signal of described gear oil pump reality, sound pressure level and loudness level;
Step 104, described ECU (Electrical Control Unit) read tooth surface abrasion fault parameter from tooth surface abrasion fault parameter database, and are mated with the sound pressure level determined and loudness level by described tooth surface abrasion fault parameter;
Step 105, determine whether tooth surface abrasion fault occurs, if determine to occur tooth surface abrasion, then perform step 106, otherwise return step 101;
If step 106 is determined to occur tooth surface abrasion fault, then perform alarm operation.
In failure diagnostic process, the noise signal that the sink of noise signal that gear oil pump self produces and power unit and power taking axle produce is mixed in the noise signal that signal picker collects, the noise signal that wherein sink of power unit and power taking axle produce needs to remove in follow-up analysis, to increase the validity of fault diagnosis as interfering noise signal.
Removal interfering noise signal process operation in step 102 can comprise the following steps: carry out Fourier transform to the noise signal received, obtain corresponding noise frequency figure; The frequency order corresponding respectively according to the cooling mechanism of predetermined described power unit, described power taking axle and described gear oil pump determines the peak value corresponding to interference noise in described noise frequency figure, and the removal of interfering noise signal is carried out according to the peak value determined, obtain the actual noise signal of gear oil pump.
The cooling mechanism of power unit, power taking axle and gear oil pump all belong to rotating machinery, according to rotating machinery fault frequency method, the noise frequency that these parts produce is all relevant with the rotating speed of standard shaft, for gear oil pump, the power taking axle of driven gear oil pump is as standard shaft, the noise frequency of its correspondence is 1 × (1 rank), and be the product of standard shaft rotating speed and the number of teeth with the noise frequency of the rotating machinery of tooth, in FIG, the gear of gear oil pump has 10 teeth, therefore corresponding noise frequency is 10 × (10 rank), and cooling mechanism has 12 teeth, corresponding noise frequency is 12 × (12 rank), so just determine the cooling mechanism of power unit, the frequency order (shown in each arrow of Fig. 1) of power taking axle and gear oil pump difference correspondence.
The noise signal of different frequency orders corresponds to different frequency peak in noise pattern, for example, the rotating speed of power unit is 2100rpm, and the noise frequency of this rotating speed lower gear oil pump is 350Hz, correspond on spectrogram, then there is a peak value in the position of 350Hz, and owing to being mixed with the interference noise that power unit self produces in this noise signal, and this noise signal corresponds to noise frequency that in spectrogram, it produces a little peak value in the position of 70Hz, therefore according to predetermined frequency order, the noise signal corresponding to 70Hz can be removed, obtain the noise signal eliminating the embodiment gear oil pump reality of interfering noise signal.
Next Analysis of failure frequency method is utilized to determine (comprising order tracking technique, Fourier transform and rotating machinery fault frequency method) noise frequency corresponding to noise signal of gear oil pump reality, sound pressure level and loudness level, wherein refer to noise frequency above to be obtained spectrogram to determine by rotating machinery fault frequency method and Fourier transform, and sound pressure level can be determined by the ratio of the tested acoustic pressure determined according to noise signal with the reference acoustic pressure preset, such as formula:
L
p=20lg(p/p
0)
Wherein, L
pfor sound pressure level, p is tested acoustic pressure, p
0for reference acoustic pressure.
And loudness level can be determined in conjunction with contour of equal loudness by noise frequency corresponding to noise signal and sound pressure level by loudness level corresponding to noise signal, wherein the relation of loudness S and loudness level Ls is as following formula:
S=2
(Ls-40)/10。
After determining noise frequency, sound pressure level and loudness level corresponding to the noise signal of gear oil pump reality, ECU (Electrical Control Unit) can read tooth surface abrasion fault parameter from tooth surface abrasion fault parameter database, and tooth surface abrasion fault parameter is mated with the sound pressure level determined and loudness level, determine currently whether there occurs tooth surface abrasion fault with this, if determine to occur tooth surface abrasion fault, then perform alarm operation, otherwise continue monitoring noise signal.
As shown in Figure 3, be the schematic flow sheet under fault test mode in another embodiment of gear oil pump tooth surface abrasion method for diagnosing faults of the present invention.Compared with a upper embodiment, in the present embodiment, the flow process under fault test mode comprises:
Step 201, under the fault test mode of described gear oil pump, ECU (Electrical Control Unit) Received signal strength collector is from unit under test noise transducer, power unit heat radiation noise transducer and the noise signal that collects of power taking axle noise transducer;
Step 202, the described ECU (Electrical Control Unit) frequency order corresponding respectively according to the noise signal received and the cooling mechanism of predetermined described power unit, described power taking axle and described gear oil pump carries out the process of removal interfering noise signal;
Step 203, described ECU (Electrical Control Unit) carry out Analysis of failure frequency to the tooth surface abrasion noise signal through removing interfering noise signal process, determine tooth surface abrasion noise frequency, sound pressure level and the loudness level corresponding to tooth surface abrasion noise signal of described gear oil pump;
Step 204, described ECU (Electrical Control Unit) using described tooth surface abrasion noise signal, corresponding tooth surface abrasion noise frequency, sound pressure level and loudness level as tooth surface abrasion fault parameter stored in described tooth surface abrasion fault parameter database.
Under fault test mode, the gear oil pump equipment having determined to occur tooth surface abrasion should be selected to carry out fault test, and after arranging sensor and acoustic isolation facility, starting device, signal picker starts acquisition noise signal.
In this course, the operation of removing interfering noise signal process comprises: carry out Fourier transform to the noise signal received, and obtains corresponding noise frequency figure; The frequency order corresponding respectively according to the cooling mechanism of predetermined described power unit, described power taking axle and described gear oil pump determines the peak value corresponding to interference noise in described noise frequency figure, and the removal of interfering noise signal is carried out according to the peak value determined, obtain the actual noise signal of gear oil pump, namely tooth surface abrasion noise signal.
After removal interfering noise signal, obtain the tooth surface abrasion noise signal through removing interfering noise signal process, pass through Analysis of failure frequency again, can determine tooth surface abrasion noise frequency, sound pressure level and the loudness level corresponding to tooth surface abrasion noise signal of gear oil pump, the sound pressure level that wherein tooth surface abrasion noise signal is corresponding can be determined by the ratio of the tested acoustic pressure determined according to described tooth surface abrasion noise signal with the reference acoustic pressure preset; Loudness level corresponding to described tooth surface abrasion noise signal can be determined in conjunction with contour of equal loudness by tooth surface abrasion noise frequency corresponding to described tooth surface abrasion noise signal and sound pressure level.
After determining the information such as tooth surface abrasion noise signal, corresponding tooth surface abrasion noise frequency, sound pressure level and loudness level, ECU (Electrical Control Unit) can using tooth surface abrasion noise signal, corresponding tooth surface abrasion noise frequency, sound pressure level and loudness level as tooth surface abrasion fault parameter stored in tooth surface abrasion fault parameter database, use in order to diagnosing tooth surface abrasion fault under mode of operation.
By the embodiment of gear oil pump tooth surface abrasion trouble-shooter of the present invention introduced above and method, can find out that the present invention utilizes the parameter attribute relevant with noise signal corresponding to tooth surface abrasion fault as the diagnosis basis of tooth surface abrasion fault, do not need directly to measure oil pump inside, accurate tooth surface abrasion fault diagnosis can be realized.
Finally should be noted that: above embodiment is only in order to illustrate that technological scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technological scheme scope of request of the present invention protection.
Claims (10)
1. a gear oil pump tooth surface abrasion trouble-shooter, described gear oil pump is connected with power unit by power taking axle, and it is characterized in that, described gear oil pump tooth surface abrasion trouble-shooter comprises:
Be arranged in the unit under test noise transducer around described gear oil pump;
Be arranged in the interference noise sensor around described power unit;
The signal picker be connected with interference noise sensor with described unit under test noise transducer respectively;
Record the tooth surface abrasion fault parameter database of the tooth surface abrasion fault parameter measured in advance;
The ECU (Electrical Control Unit) be connected with tooth surface abrasion fault parameter database with described signal picker respectively;
Described ECU (Electrical Control Unit) comprises:
Read tooth surface abrasion fault parameter from described tooth surface abrasion fault parameter database, and the noise signal that described signal picker collects is processed and carries out signal transacting and the parameter matching module of tooth surface abrasion fault parameter coupling;
The Alarm module of alarm operation is performed according to the tooth surface abrasion fault determined;
Wherein, described ECU (Electrical Control Unit) is used under the mode of operation of described gear oil pump, receive the noise signal that described signal picker collects from described unit under test noise transducer and described interference noise sensor, and the process of removal interfering noise signal is carried out to the noise signal received, again Analysis of failure frequency is carried out to the noise signal through removing interfering noise signal process, determine the noise frequency corresponding to noise signal of described gear oil pump reality, sound pressure level and loudness level, then tooth surface abrasion fault parameter is read from described tooth surface abrasion fault parameter database, and described tooth surface abrasion fault parameter is mated with the sound pressure level determined and loudness level, determine whether tooth surface abrasion fault occurs, if determine to occur tooth surface abrasion fault, then perform alarm operation.
2. gear oil pump tooth surface abrasion trouble-shooter according to claim 1, it is characterized in that, described interference noise sensor comprises the power unit heat radiation noise transducer around the cooling mechanism being arranged on described power unit and is arranged on described power taking axial power taking axle noise transducer.
3. gear oil pump tooth surface abrasion trouble-shooter according to claim 1, it is characterized in that, described ECU (Electrical Control Unit) also comprises:
Fault test module, by removing interference noise process and Analysis of failure frequency determination tooth surface abrasion noise signal, corresponding tooth surface abrasion noise frequency, sound pressure level and loudness level, and as tooth surface abrasion fault parameter stored in described tooth surface abrasion fault parameter database.
4. according to the arbitrary described gear oil pump tooth surface abrasion trouble-shooter of claims 1 to 3, it is characterized in that, at described power unit, between gear oil pump and power taking axle, be provided with sound-absorbing partition or sound absorption cotton.
5., based on a gear oil pump tooth surface abrasion method for diagnosing faults for the arbitrary described gear oil pump tooth surface abrasion trouble-shooter of Claims 1 to 4, it is characterized in that, comprising:
Under the mode of operation of described gear oil pump, the noise signal that ECU (Electrical Control Unit) Received signal strength collector collects from unit under test noise transducer and interference noise sensor;
Described ECU (Electrical Control Unit) carries out the process of removal interfering noise signal to the noise signal received;
Described ECU (Electrical Control Unit) carries out Analysis of failure frequency to the noise signal through removing interfering noise signal process, determines the noise frequency corresponding to noise signal of described gear oil pump reality, sound pressure level and loudness level;
Described ECU (Electrical Control Unit) reads tooth surface abrasion fault parameter from tooth surface abrasion fault parameter database, and is mated with the sound pressure level determined and loudness level by described tooth surface abrasion fault parameter, determines whether tooth surface abrasion fault occurs;
If determine to occur tooth surface abrasion fault, then perform alarm operation.
6. gear oil pump tooth surface abrasion method for diagnosing faults according to claim 5, it is characterized in that, described interference noise sensor comprises the power unit heat radiation noise transducer around the cooling mechanism being arranged on described power unit and is arranged on described power taking axial power taking axle noise transducer.
7. gear oil pump tooth surface abrasion method for diagnosing faults according to claim 6, is characterized in that, also comprise:
Under the fault test mode of described gear oil pump, the noise signal that ECU (Electrical Control Unit) Received signal strength collector collects from unit under test noise transducer, power unit heat radiation noise transducer and power taking axle noise transducer;
The described ECU (Electrical Control Unit) frequency order corresponding respectively according to the noise signal received and the cooling mechanism of predetermined described power unit, described power taking axle and described gear oil pump carries out the process of removal interfering noise signal;
Described ECU (Electrical Control Unit) carries out Analysis of failure frequency to the tooth surface abrasion noise signal through removing interfering noise signal process, determines tooth surface abrasion noise frequency, sound pressure level and the loudness level corresponding to tooth surface abrasion noise signal of described gear oil pump;
Described ECU (Electrical Control Unit) using described tooth surface abrasion noise signal, corresponding tooth surface abrasion noise frequency, sound pressure level and loudness level as tooth surface abrasion fault parameter stored in described tooth surface abrasion fault parameter database.
8. gear oil pump tooth surface abrasion method for diagnosing faults according to claim 7, is characterized in that, the frequency order that the cooling mechanism of described power unit, described power taking axle and described gear oil pump are corresponding is respectively determined by standard shaft rotating speed and the number of teeth.
9. gear oil pump tooth surface abrasion method for diagnosing faults according to claim 7, is characterized in that, the operation of described removal interfering noise signal process comprises:
Fourier transform is carried out to the noise signal received, obtains corresponding noise frequency figure;
The frequency order corresponding respectively according to the cooling mechanism of predetermined described power unit, described power taking axle and described gear oil pump determines the peak value corresponding to interference noise in described noise frequency figure, and the removal of interfering noise signal is carried out according to the peak value determined, obtain the actual noise signal of gear oil pump.
10. gear oil pump tooth surface abrasion method for diagnosing faults according to claim 7, it is characterized in that, sound pressure level corresponding to described tooth surface abrasion noise signal is determined by the ratio of the tested acoustic pressure determined according to described tooth surface abrasion noise signal with the reference acoustic pressure preset; Loudness level corresponding to described tooth surface abrasion noise signal is determined in conjunction with contour of equal loudness by tooth surface abrasion noise frequency corresponding to described tooth surface abrasion noise signal and sound pressure level.
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| CN201210279126.8A CN102788014B (en) | 2012-08-08 | 2012-08-08 | Gear oil pump tooth surface wearing fault diagnosis device and method |
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| CN201210279126.8A CN102788014B (en) | 2012-08-08 | 2012-08-08 | Gear oil pump tooth surface wearing fault diagnosis device and method |
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| CN102788014B true CN102788014B (en) | 2015-04-22 |
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| CN102788014A (en) | 2012-11-21 |
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