CN111927756B - Dynamic parameter time domain test analysis method for automobile fluid pump - Google Patents
Dynamic parameter time domain test analysis method for automobile fluid pump Download PDFInfo
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Abstract
The invention discloses a time domain test analysis method for dynamic parameters of an automobile fluid pump, wherein the fluid pump comprises a rotor, a blade, a cylinder body, a clutch armature connected with a long shaft of the rotor and a belt pulley, a compression cavity is arranged in the pump, and the time domain test analysis method comprises the following steps: s1: calibrating the characteristic position information points of the fluid pump, including calibrating the internal characteristic position information points and the external characteristic position information points; s2: acquiring a position signal, performing photoelectric signal time domain triggering conversion through a photoelectric sensor, transmitting dynamic parameter information of the fluid pump to a high-speed data acquisition instrument for real-time recording, and accurately quantifying and recording the rotation performance of the fluid pump by combining the recording of an external photoelectric time domain signal and the synchronization of the dynamic parameter time domain signal; s3: time domain analysis of the dynamic parameters of the characteristic position information points, specifically to S31: rotational performance analysis and S32: the invention relates to a quick fault component positioning analysis, which mainly solves the problem that an excitation response signal and a structure rotation position signal do not correspond to each other in time domain when a fluid pump rotating body operates.
Description
Technical Field
The invention relates to the technical field of automobile fluid pumps, in particular to a dynamic parameter time domain test analysis method for an automobile fluid pump.
Background
The automobile fluid pump is a kind of fluid machinery suitable for automobile electric appliances, generally including small rotary structural pump bodies such as automobile air conditioner compressors, oil pumps, chilled water pumps, air compressors and the like, and has the main functions of fluid compression, fluid delivery and other practical use functions. The automobile fluid pump is assembled in a high-temperature and strong-vibration road use environment in an automobile engine cabin, the problems of noise vibration and functional fault complaint of fluid pump parts and the whole automobile are caused frequently when the automobile fluid pump runs under multiple alternating loads, and mechanical damage of subsequent parts is caused seriously or even caused.
Therefore, in the product design, a time domain test analysis method of dynamic parameters needs to be designed, an accurate corresponding relation is established with the motion position information of the structural component of the fluid pump and the mechanical and fluid excitation, the information of the performance parameters of the dynamic fluid pump and the motion position of the component are subjected to related analysis, and the improved design of the product on performance, NVH and safety is promoted.
In the product market application link, a time domain signal test of dynamic parameters needs to be adopted to quickly locate and accurately analyze fault samples so as to find out problem parts. Firstly, the existing inspection method adopts noise and performance index limit judgment, and the whole machine sample is replaced for dealing with the noise and performance index limit judgment, so that the cost of the after-sale claim is increased; secondly, the existing test analysis means cannot identify and distinguish the fault information caused by which problem component is specifically identified.
The invention relates to a single dynamic parameter of an automobile air conditioner compressor from previous patent applications, such as the invention patent of measuring the pressure of a compression cavity of the compressor, namely' a compression cavity dynamic pressure measuring device of a rotary vane type automobile air conditioner compressor, the patent number is as follows: ZL201820896580.0 ' for measuring backpressure of a rotary vane type automobile air conditioner compressor, and ' a rotary vane type automobile air conditioner compressor rotor and vane backpressure measuring device ZL201821430558.3 ' for measuring dynamic torque of the compressor, but the patent for measuring dynamic torque of the compressor, namely ' a torque measuring device of the automobile air conditioner compressor ', is blank for a test technology of dynamic parameters of a fluid pump of the automobile air conditioner compressor type and a comprehensive use analysis method of positioning information of moving parts, and an integrated use analysis method and a technical means are formed by combining the practical application environment, urgently needing an integrated technology and integrating the technical requirements and a plurality of related technical patents.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a dynamic parameter time domain test analysis method for an automobile fluid pump, adopts a high-response fluid pump operation parameter sensor to perform real-time test analysis, mainly solves the problem that the time domain of an excitation response signal and a structure rotation position signal does not correspond when a fluid pump rotating body operates, and provides a fluid pump rotation compression and conveying performance analysis method based on time domain signals.
The purpose of the invention is realized as follows:
a time domain test analysis method for dynamic parameters of an automobile fluid pump comprises the following steps:
s1: fluid pump characteristic location information point calibration
Internal feature position information points: selecting characteristic position information points on the circumference of a rotor inside the fluid pump, projecting and extending the characteristic position information points to the outer peripheral surface or the end surface of an armature which synchronously rotates by using a laser positioning device, sticking a photoelectric reflection mark on the outer peripheral surface or the end surface to form the same radian position information projected from the inner position of the rotor to the position of an external armature, and sticking a rotary positioning mark on the circumferential direction of a belt pulley of the fluid pump;
extrinsic feature position information points: arranging a plurality of photoelectric sensors outside the fluid pump, wherein the photoelectric sensors are used as optical signal transmitting and receiving information ports, and the set positions of the ports of the photoelectric sensors select characteristic position information points related to dynamic parameters of the fluid pump;
s2: position signal acquisition
After the fluid pump is operated, photoelectric signal time domain triggering conversion is carried out through a photoelectric sensor, dynamic parameter information of the fluid pump is transmitted to a high-speed data acquisition instrument for real-time recording, and the rotation performance of the fluid pump is accurately quantified and recorded in combination with recording of an external photoelectric time domain signal and synchronization of the dynamic parameter time domain signal;
s3: characteristic position information point dynamic parameter time domain analysis
S31: analysis of rotational Performance
Performing performance analysis based on pressure excitation of the rotation position information of the fluid pump and torsional transmission excitation of the pump body, and performing comprehensive analysis by referring to the cavity pressure of a compression cavity of the fluid pump and the input torque of the pump body at the same moment;
analyzing the performance of the clutch at the starting moment, transmitting a time domain voltage signal at the belt pulley rotation positioning mark to a high-speed data acquisition instrument through a photoelectric sensor, representing the change characteristic of the rotation performance information before the clutch is started, comprehensively analyzing by comparing a clutch current voltage signal, a fluid pump rotation dynamic parameter signal and an armature position signal, and judging and evaluating the characteristic of the clutch transmission performance;
s32: fast failure component location analysis
According to the representation of the dynamic parameters in the fault sample, firstly reproducing the fault phenomenon, then capturing the time domain signal of the fault phenomenon, synchronously acquiring the position information and the excitation parameters of the rotating part, carrying out comprehensive analysis, and quickly locking the dynamic parameter characteristics of the problem part;
and when the fault prototype can not be disassembled for physical positioning, performing reverse problem analysis by adopting a backward estimation method.
Preferably, in step S1, the air-conditioning compressor is selected as a feature model of the time-domain testing method for the dynamic parameter of the fluid pump of the vehicle, and the feature position information points on the circumference of the rotor of the fluid pump are the blade notch position and the blade groove width information.
Preferably, the set position of the photoelectric sensor in the step S1 selects one or more of the corresponding point of the photoelectric reflection mark on the periphery of the armature, the intersection point of the cylinder ellipse line and the rotor circumference line, the position point of the cylinder exhaust port, and the farthest extending point of the blade.
Preferably, the characteristic position information points on the circumference of the rotor select one or more blade notch positions and notch widths on the circumference of the compressor rotor to be used as positioning marks, and photoelectric reflection marks with consistent quantity are pasted at the projection positions on the outer peripheral surface or the end surface of the armature.
Preferably, the characteristics of judging and evaluating the transmission performance at the moment of starting the clutch are mainly divided into:
testing and evaluating the clutch pull-in time, and analyzing and evaluating the influence of dynamic parameters in the pull-in process;
testing and evaluating the synchronous duration of the clutch, analyzing and evaluating the association of dynamic parameters of the rotation performance of the compressor in the synchronous process, and analyzing and evaluating the noise vibration response.
Preferably, the dynamic parameters of the fluid pump in step S1 include one or more of compression cavity pressure, vane back pressure, exhaust cavity pressure, dynamic torque, clutch current voltage, suction/exhaust pressure pulsation, and overall excitation force.
Preferably, the time domain signal of the fault phenomenon in step S32 is mainly based on response signal-like noise, vibration, pulsation, excitation force, and the position information and the excitation parameter are mainly based on compression cavity pressure and pump body dynamic torque.
Preferably, in step S32, the backward problem analysis method using the backward estimation method is to arbitrarily make a position identifier in the circumferential direction of the armature, perform advanced acquisition on the identifier information and the dynamic parameter information, perform position comparison analysis on the acquired time domain information and the fluid pump rotation performance dynamic parameter information designed by forward positioning, and locate a component corresponding to the failure time domain signal by associating the component position according to the time domain information.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the design of a dynamic parameter time domain test analysis system is carried out by taking the air conditioner compressor as a characteristic analysis model, so that the design and research of pump products are facilitated, the test technical means of pump product design and quality control are enriched, and the evaluation precision and speed of the rotation performance are improved.
2. The invention takes the automobile fluid pump as an analysis basis, refines the test verification analysis technical means of typing, commonality and universalization in the automobile parts, can be widely popularized and applied in the products of the type, and is beneficial to breaking through the evaluation problem in the technical upgrade of the automobile parts.
3. The high-response fluid pump operation parameter sensor is adopted for real-time test analysis, and the problem that an excitation response signal and a structure rotation position signal do not correspond to each other in time domain when a fluid pump rotating body operates is mainly solved.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic view of the mating of the fluid pump rotor, cylinder and vanes;
FIG. 3 is a timing diagram of rotational positions of inner and outer rotating components of the fluid pump;
FIG. 4 is a schematic view of a fluid pump cylinder, rotor body, and armature;
FIG. 5 is a flow chart of a fluid pump rotation performance analysis;
FIG. 6 is a flow chart of a fluid pump fast failure component location analysis;
FIG. 7 is a time domain graph of a dynamic parameter and a mechanical motion position of a fluid pump rotating a part at a certain speed;
FIG. 8 is a layout of internal feature location information points (vane slot locations) and external feature information location points (photosensors);
fig. 9 is a schematic view of the construction of the pulley portion of the fluid pump.
In the attached drawing, 1 is a rotor, 2 is a blade, 3 is a cylinder body, 4 is an armature, 5 is a compression cavity, 6 is a photoelectric reflection mark, 7 is a photoelectric sensor, 8 is a belt pulley,
in figure 3 a is the first characteristic position information point on the rotor,
a' is a characteristic position point of the first characteristic position information point projected onto the end face of the armature rotating synchronously,
in figure 4I is the connection position where the long axis of the rotor rotates synchronously with the armature spline assembly,
in FIG. 8, A1 represents the position of the photoelectric sensor at the exhaust port of the cylinder, A2 represents the position of the photoelectric sensor at the intersection of the cylinder elliptical profile and the rotor circumferential profile, A3 represents the position of the photoelectric sensor at the farthest point where the vane extends, and B represents the information point of the internal characteristic position (vane notch position)
In fig. 7, C is a dynamic parameter time domain curve, and D is a mechanical motion position time domain curve.
Detailed Description
The invention is further explained by combining the attached drawings, referring to fig. 1, fig. 2 and fig. 9, a time domain test analysis method for dynamic parameters of an automobile fluid pump is provided, the fluid pump comprises a rotor 1, a blade 2, a cylinder body 3, a clutch armature 4 and a belt pulley 8 which are connected with a long shaft of the rotor, and a compression cavity 5 is arranged in the pump.
In order to accurately illustrate the technical scheme of the invention, the rotary vane type automobile air conditioner compressor is selected as a characteristic model of the automobile fluid pump dynamic parameter time domain test method;
the rotary structure of the rotary vane compressor consists of a rotor 1, 5 vanes 2, an elliptic molded line cylinder 3, a front end plate, a rear end plate, a clutch armature 4 connected with the long axis of the rotor and a belt pulley 8.
As shown in fig. 2 and 4, the rotary part of the rotary vane air conditioner compressor has a rotor 1, a vane 2, an armature 4 and a pulley 8, and the part related to the rotary performance has two parts,
five closed compression cavities formed by combining the rotor 1, the blades 2, the front and rear end plates and the cylinder body 3 output fluid excitation after refrigerant fluid compression acting, and input torsional excitation by a transmission shaft system formed by combining the rotor body, the armature 4 and the belt pulley 8,
the two performance components interact with each other to complete the rotary compression performance of the rotary vane compressor during operation.
When the clutch is attracted, the armature 4 is attracted with the belt pulley 8, external power is input through the clutch and transmitted to the compressor rotor 1, the rotor 1 drives the rotating performance component to form a continuous compression cavity, the compressed cold medium acts, the low-temperature and low-pressure refrigerant compressor is changed into high-temperature and high-pressure gas to provide a large temperature difference condition for efficient heat exchange of a subsequent condenser, therefore, pressure excitation formed by fluid compression and torsional excitation of mechanical work are used as main dynamic parameters to perform quantitative performance analysis, and sound vibration safety improvement analysis is required by taking the acceleration of the surface of the shell, the sound pressure of radiation noise and the excitation force of the whole machine as dynamic response parameters in the compression work-doing process.
Referring to fig. 1, the analysis method of the present invention comprises the steps of:
s1: fluid pump characteristic location information point calibration
Internal feature position information points: selecting characteristic position information points on the circumference of a rotor inside the compressor, projecting and extending the characteristic position information points to the outer circumferential surface or the end surface of the armature 4 which synchronously rotates by using a laser positioning device, sticking a photoelectric reflection mark 6 on the outer circumferential surface or the end surface to form the same radian position information projected from the inner position of the rotor 1 to the position of the external armature 4, and sticking a rotary positioning mark in the circumferential direction of a belt pulley of the compressor;
in this embodiment, the characteristic position information point on the rotor circumference selects one or more blade notch positions and notch widths on the compressor rotor circumference to make the location mark, and projects the photoelectric reflection sign of quantity unanimity in position department on the outer peripheral face or the terminal surface of armature, recommends 5 notch positions of selecting the rotor all to make corresponding location mark, and positional information is abundanter, and a plurality of positional information can do more accurate location, confirm with time domain signal redundancy, photoelectric reflection sign and rotational positioning sign can adopt paper that has reflection of light performance to paste can.
The method for projecting and extending by using the laser positioning device comprises the following steps: the laser point is projected from the position of the rotor notch to extend to the position point of the rotor long shaft spline on the same radian, the position of the spline mark is identified, when the compressor is assembled, the position of the spline mark corresponds to the position of the armature spline matched with the installation and is marked, and finally, the armature spline mark position information corresponds to the armature periphery photoelectric reflection mark 6, so that the same radian position information from the inner position of the rotor to the outer position is formed.
In the invention, the information of the width dimension of the blade groove of the rotor also needs to extend to the width of the photoelectric positioning mark 6 on the circumference of the armature after internal positioning so as to ensure the accurate judgment and recording of the motion position of the blade 2.
Extrinsic feature position information points: the method comprises the following steps that the radian position of the periphery of an armature of the compressor is used as a photoelectric reflection mark, a plurality of photoelectric sensors 7 are arranged outside an air conditioner compressor, the photoelectric sensors 7 are used as optical signal transmitting and receiving information ports, and characteristic position information points related to dynamic parameters of the compressor are selected according to the set positions of the ports of the photoelectric sensors 7; in the present embodiment, as shown in fig. 8, the photoelectric sensor 7 is set to select one or more of the corresponding points of the photoelectric reflection marks 6 on the periphery of the armature 4, the intersection point of the cylinder ellipse line and the rotor circumference line, the position point of the cylinder exhaust port, and the farthest extending point of the blade.
The dynamic parameters in the embodiment include one or more of compression cavity pressure, blade back pressure, exhaust cavity pressure, dynamic torque, clutch current voltage, suction and exhaust pressure pulsation and whole machine excitation force.
The characteristic position information marked from the inside of the compressor rotor and the external characteristic position positioning information are integrated to represent the accurate position information when the compressor rotates.
S2: position signal acquisition
After the compressor is operated, photoelectric signal time domain triggering conversion is carried out on the peripheral surface or the end surface of the compressor armature iron 4 through a photoelectric sensor 7, the dynamic parameter information of the compressor is transmitted to a high-speed data acquisition instrument in a voltage square wave signal form for real-time recording, and other dynamic parameter signals (compression cavity pressure, dynamic torque, exciting force and the like) are synchronously recorded, so that the rotation performance of the compressor is accurately quantized and recorded by combining the recording of external photoelectric time domain signals and the synchronization of the dynamic parameter time domain signals;
typically the photosensor 7 voltage response period is recommended to be chosen below 1 microsecond,
voltage response cycle selection remarks: according to the characteristics of the rotary vane compressor, the highest rotating speed is 10000 r/m, the cylinder body is provided with two exhaust ports and 5 vane structures, and the time of rotating for a circle is as follows: 1/(10000/60) is 0.006 second, and each exhaust time is as follows: 0.006/10-0.0006-0.6 millisecond, considering the sampling requirement, 0.6/5-0.12 millisecond-120 microsecond, therefore the ratio of the voltage response period to the sampling response is lower than 1/120-0.008-0.8%, the maximum speed is operated, and the influence of the delay of the sampling time period is small.
S3: characteristic position information point dynamic parameter time domain analysis
S31: analysis of rotational Performance
As shown in fig. 5, performance analysis is performed based on pressure excitation and pump body torsional transmission excitation of the fluid pump rotational position information, and comprehensive analysis is performed with reference to cavity pressure of a fluid pump compression cavity and input torque of the pump body at the same time;
firstly, five closed compression cavities are formed by a blade 2, a cylinder body 3, a rotor 1 and front and rear end plates in the rotary performance of the rotary vane compressor, the compression performance of each compression cavity determines the magnitude of work done by a compressor medium, therefore, in the rotary design of the rotary vane compressor, the medium compression pressure change in the compression process is in accordance with the structural condition of the rotary vane compressor, the time sequence relation of the rotary position is shown in figure 3, the arrow direction in figure 3 shows the synchronous rotation direction of the rotor and an armature, a shows the position of one blade notch characteristic position point on the rotor on the circumference of the rotor, a' shows the position of one blade notch characteristic position point projected and extended to the end face of the armature, and a graph of a dynamic parameter-pressure time domain curve and a mechanical motion position time domain curve of one characteristic position point rotating one circle of the compressor at a certain rotation speed is reflected in figure 7, the performance characteristics can be judged and analyzed through the curve graph, whether the peak value generating position of the characteristic curve is consistent with the design simulation result of the rotating structure or not can be judged and analyzed, the rotating performance design digital simulation model is corrected, the movement mechanism conformance of the digital simulation model is checked, whether the actual rotating structure movement position point conforms to the change rule of the rotating compression or not can be judged, and the third step is used for quantitatively testing and evaluating the optimization improvement effect of the newly optimized rotating performance component.
Analyzing the performance of the clutch at the starting moment, transmitting a time domain voltage signal at the belt pulley rotation positioning mark to a high-speed data acquisition instrument through a photoelectric sensor 7, representing the change characteristic of the rotation performance information before the clutch is started, comprehensively analyzing by comparing a clutch current voltage signal, a fluid pump rotation dynamic parameter signal and an armature position signal, and judging and evaluating the characteristic of the transmission performance of the clutch;
mainly comprises the following steps:
testing and evaluating the clutch pull-in time, and analyzing and evaluating the influence of dynamic parameters in the pull-in process.
Testing and evaluating the synchronous time of the clutch, analyzing and evaluating the association of a plurality of dynamic parameters of the rotation performance of the compressor in the synchronous process, and analyzing and evaluating the noise vibration response.
Remarking: the clutch attracting operation process is divided into an attracting process and a synchronizing process from the viewpoint of motion time sequence.
S32: fast failure component location analysis
As shown in fig. 6, according to the characterization of the dynamic parameters in the fault sample, firstly, the fault phenomenon is reproduced, then, the time domain signal of the fault phenomenon is captured, usually, the noise, vibration, pulsation and excitation force of the response-like signal are taken as the main, the position information and the excitation parameters of the rotating part, such as the pressure of the compression cavity, the dynamic torque and the like, are synchronously acquired to perform comprehensive analysis, and the dynamic parameter characteristics of the problem part are quickly locked; and performing disassembly inspection, performing focusing quality inspection on the appearance size, the matching action tolerance, the matching clearance, the material performance and the like of the component, performing reproduction mode analysis and mechanism consistency analysis by combining with the characteristic of the problem characteristic parameter, and performing a verification test on a replaced sample to confirm closed-loop control of the fault problem.
And when the fault prototype can not be disassembled for physical positioning, performing reverse problem analysis by adopting a backward estimation method. The method comprises the steps of randomly making a position mark in the circumferential direction of an armature, carrying out early acquisition on mark information and dynamic parameter information, carrying out position comparison analysis on acquired time domain information and compressor rotation performance dynamic parameter information which is positively positioned, pushing the position information of the armature backwards to the radian position of an armature spline and extending to the radian position of a long shaft spline when a machine is dismounted, extending the position information to the radian position of a rotor in a state that the rotor is not disordered, and positioning the position of a component according to the time domain information so as to find a component corresponding to a fault time domain signal in a related manner.
In the embodiment, a rotary vane compressor is used as a characteristic model of a dynamic parameter time domain analysis method of an automobile fluid pump for technical explanation, the pump structures of the automobile fluid pump are various, but the main performance characteristics of the small-power pumps are compressed media and pumped fluid, and the main realization means is that the rotor structure of a pump body is rotated, so the method essentially achieves the performance analysis purpose of the automobile fluid pump by arranging, designing and collecting time domain dynamic parameter signals on a rotating body, combines the prior dynamic parameter sensor technology for extension design, designs a representation method of the rotation performance of the automobile fluid pump by using the angle of a time domain, implements related test design, quantitatively represents a new technical means of test design of the universality of the automobile fluid pump such as the motion relation and performance influence factors of an internal structure, the design system of the common technology of the automobile fluid pump is perfected.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (8)
1. A time domain test analysis method for dynamic parameters of an automobile fluid pump comprises a rotor, blades, a cylinder body, a clutch armature connected with a long shaft of the rotor and a belt pulley, wherein a compression cavity is arranged in the pump, and the time domain test analysis method is characterized by comprising the following steps of:
s1: fluid pump characteristic location information point calibration
Internal feature position information points: selecting characteristic position information points on the circumference of a rotor inside the fluid pump, projecting and extending the characteristic position information points to the outer peripheral surface or the end surface of an armature which synchronously rotates by using a laser positioning device, sticking a photoelectric reflection mark on the outer peripheral surface or the end surface to form the same radian position information projected from the inner position of the rotor to the position of an external armature, and sticking a rotary positioning mark on the circumferential direction of a belt pulley of the fluid pump;
extrinsic feature position information points: arranging a plurality of photoelectric sensors outside the fluid pump, wherein the photoelectric sensors are used as optical signal transmitting and receiving information ports, and the set positions of the ports of the photoelectric sensors select characteristic position information points related to dynamic parameters of the fluid pump;
s2: position signal acquisition
After the fluid pump is operated, photoelectric signal time domain triggering conversion is carried out through a photoelectric sensor, dynamic parameter information of the fluid pump is transmitted to a high-speed data acquisition instrument for real-time recording, and the rotation performance of the fluid pump is accurately quantified and recorded in combination with recording of an external photoelectric time domain signal and synchronization of the dynamic parameter time domain signal;
s3: characteristic position information point dynamic parameter time domain analysis
S31: analysis of rotational Performance
Performing performance analysis based on pressure excitation of the rotation position information of the fluid pump and torsional transmission excitation of the pump body, and performing comprehensive analysis by referring to the cavity pressure of a compression cavity of the fluid pump and the input torque of the pump body at the same moment;
analyzing the performance of the clutch at the starting moment, transmitting a time domain voltage signal at the belt pulley rotation positioning mark to a high-speed data acquisition instrument through a photoelectric sensor, representing the change characteristic of the rotation performance information before the clutch is started, comprehensively analyzing by comparing a clutch current voltage signal, a fluid pump rotation dynamic parameter signal and an armature position signal, and judging and evaluating the characteristic of the clutch transmission performance;
s32: fast failure component location analysis
According to the representation of the dynamic parameters in the fault sample, firstly reproducing the fault phenomenon, then capturing the time domain signal of the fault phenomenon, synchronously acquiring the position information and the excitation parameters of the rotating part, carrying out comprehensive analysis, and quickly locking the dynamic parameter characteristics of the problem part;
and when the fault prototype can not be disassembled for physical positioning, performing reverse problem analysis by adopting a backward estimation method.
2. The time domain test analysis method for the dynamic parameters of the fluid pump of the automobile as claimed in claim 1, wherein: and S1, selecting the air conditioner compressor as a characteristic model of the dynamic parameter time domain test method of the automobile fluid pump, wherein characteristic position information points on the circumference of the fluid pump rotor are blade notch position and blade groove width information.
3. The time domain test analysis method for the dynamic parameters of the automotive fluid pump according to claim 2, characterized in that: in step S1, the photoelectric reflection mark point on the periphery of the armature, the intersection point of the cylinder ellipse profile and the rotor circumference profile, the position point of the cylinder exhaust port, and one or more position points of the farthest extending point of the blade are selected for the set position of the photoelectric sensor.
4. The time domain test analysis method for the dynamic parameters of the automotive fluid pump according to claim 2, characterized in that: the characteristic position information points on the circumference of the rotor select the positions and the widths of one or more blade notches on the circumference of the compressor rotor to be used as positioning marks, and photoelectric reflection marks with consistent quantity are stuck at the projection positions on the outer circumferential surface or the end surface of the armature.
5. The automotive fluid pump dynamic parameter time domain test analysis method according to claim 1 or 2, characterized in that: the characteristics of judging and evaluating the clutch starting instant transmission performance mainly comprise:
testing and evaluating the clutch pull-in time, and analyzing and evaluating the influence of dynamic parameters in the pull-in process;
testing and evaluating the synchronous duration of the clutch, analyzing and evaluating the association of dynamic parameters of the rotation performance of the compressor in the synchronous process, and analyzing and evaluating the noise vibration response.
6. The automotive fluid pump dynamic parameter time domain test analysis method according to claim 1 or 2, characterized in that: the dynamic parameters of the fluid pump in step S1 include one or more of compression cavity pressure, vane back pressure, exhaust cavity pressure, dynamic torque, clutch current voltage, suction/exhaust pressure pulsation, and overall excitation force.
7. The automotive fluid pump dynamic parameter time domain test analysis method according to claim 1 or 2, characterized in that: the time domain signal of the fault phenomenon in the step S32 is mainly the response signal noise, vibration, pulsation, and excitation force, and the position information and the excitation parameter are mainly the compression cavity pressure and the pump body dynamic torque.
8. The automotive fluid pump dynamic parameter time domain test analysis method according to claim 1 or 2, characterized in that: in the step S32, the backward problem analysis method using backward estimation is to arbitrarily make a position identifier in the armature circumferential direction, perform earlier acquisition on the identifier information and dynamic parameter information, perform position comparison analysis by using the acquired time domain information and the fluid pump rotation performance dynamic parameter information designed by forward positioning, and position the component according to the time domain information, so as to find the component corresponding to the failure time domain signal by this correlation.
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| CN101881269A (en) * | 2009-05-07 | 2010-11-10 | 通用电气公司 | Multistage compressor faut detection and protection |
| CN103147972A (en) * | 2013-03-19 | 2013-06-12 | 北京化工大学 | Reciprocating-type compressor fault diagnosis method based on multi-sensor information fusion |
| CN105699074A (en) * | 2016-04-01 | 2016-06-22 | 山东大学 | Fluid-structure interaction dynamic property testing device for blade-rotor system |
| JP6674066B1 (en) * | 2019-09-11 | 2020-04-01 | 株式会社荏原製作所 | Display method for displaying state of pump device, pump device, pump system, computer program, display, and test method |
| CN111306076A (en) * | 2020-02-26 | 2020-06-19 | 江苏大学 | Device and method for testing backflow vortex cavitation of vane pump |
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