CN106403880B - Method and device for detecting clearance between compressor rotor and stator - Google Patents
Method and device for detecting clearance between compressor rotor and stator Download PDFInfo
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- CN106403880B CN106403880B CN201610893789.7A CN201610893789A CN106403880B CN 106403880 B CN106403880 B CN 106403880B CN 201610893789 A CN201610893789 A CN 201610893789A CN 106403880 B CN106403880 B CN 106403880B
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- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/17—Tolerance; Play; Gap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/86—Detection
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressor (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a method for detecting a gap between a rotor and a stator of a compressor, which comprises the following steps: s1, acquiring the acceleration information of the compressor, wherein the gap between the rotor and the stator meets the requirement and is a qualified product; s2, recording the collected compressor acceleration information into the processor as reference information; s3, collecting the acceleration information of the compressor to be tested and comparing the acceleration information with the reference information, and judging whether the clearance between the rotor and the stator of the compressor is qualified or not, thereby determining whether the compressor is qualified or not. The invention also discloses a device for detecting the clearance between the rotor and the stator of the compressor. The invention does not need to drive the compressor top cover from the compressor shell, improves the judging efficiency of whether the space between the rotor and the stator in the compressor shell meets the requirement or not, and saves the production cost; the reworking cost is reduced, the testing efficiency is improved, the mass compressor detection is suitable, and the product quality is improved.
Description
Technical Field
The invention belongs to the technical field of compressor testing, and particularly relates to a method and a device for detecting a gap between a compressor rotor and a compressor stator.
Background
In the technical field of compressor production, after the compressor is produced, a gap between a rotor and a stator in a compressor shell needs to be detected so as to ensure that the gap between the rotor and the stator meets the requirements in the industry and ensure the quality of the compressor. After the compressor is produced by the existing compressor production enterprises, the gap between the rotor and the stator is mainly detected under the following two conditions: one is that the compressor top cover is not welded, and the gap sheet can be directly used for inspection; in another case, the compressor is assembled, that is, the compressor housing and the top cover are welded and fixed, and the top cover of the compressor can only be removed by turning the top cover by a lathe and then can be checked by using the clearance sheet, so that the existing clearance checking method between the rotor and the stator has limitations. When the gaps between the rotors and the stators of a large batch of compressors are not satisfactory due to some processing reasons, the compressors with the gaps between the rotors and the stators which are not satisfactory need to be screened out from the large batch of compressors, and the existing method can only be used for checking after turning the top cover, so that the heavy construction cost is increased.
Therefore, aiming at a large batch of compressors which are assembled to weld the shell and the top cover, the problem that how to overcome the existing problem that the gap between the rotor and the stator is judged on the premise of not turning the top cover is solved, the compressor which has the illegal requirement on the gap between the rotor and the stator is selected from the large batch of compressor products, the detection efficiency is improved, the cost is reduced, and the difficulty and the direction of research and development of enterprises are formed.
Disclosure of Invention
In view of this, the technical problem to be solved by the invention is to provide a method and a device for detecting the clearance between the rotor and the stator of the compressor, which have the advantages of strong practicability, high detection efficiency and low detection cost, and improve the efficiency of screening the compressor with the clearance between the rotor and the stator which is not required illegally from a large number of compressors by enterprises.
In order to solve the technical problem, the invention adopts the following scheme: a method for detecting a gap between a rotor and a stator of a compressor includes the steps of:
s1, acquiring acceleration information of a frequency band of the compressor, wherein the gap between the rotors and the stators meets the requirement, the gap between the rotors and the stators does not meet the requirement;
s2, recording the acceleration information of a certain frequency band of the compressor into the processor as reference information;
s3, acquiring the acceleration information of the compressor to be tested, wherein the frequency section of the acquired acceleration information of the compressor to be tested is the same as that of the acceleration information of the qualified compressor;
s4, comparing the acceleration information of the compressor to be tested with the reference information, and judging whether the clearance between the rotor and the stator of the compressor is qualified, thereby determining whether the compressor is qualified.
Preferably, the specific steps of step S1 are:
s11, selecting a qualified compressor with a gap between the rotor and the stator meeting the requirement;
s12, electrifying the compressor, and measuring the acceleration information of the compressor by using an acceleration sensor at a fixed position of the shell of the compressor;
s13, collecting dynamic acceleration information of the compressor measured by the acceleration sensor by using a collection module;
the S14 processor processes the collected dynamic acceleration information into acceleration information of a certain frequency band;
s15 uses the acceleration information as acceleration reference information for the subsequent test.
Preferably, the specific steps of step S3 are:
acquiring acceleration information on a shell of a compressor to be tested, comparing the acquired acceleration information with reference information, and if the acquired acceleration information is greater than the reference information, judging that a gap between a rotor and a stator in the compressor does not meet the requirement, thereby judging that the compressor is an unqualified product;
and if the acquired acceleration information is less than or equal to the reference information, judging that the gap between the rotor and the stator in the compressor meets the requirement, and judging that the compressor is a qualified product.
Preferably, the position for collecting the acceleration information of the shell of the compressor to be tested is the same as or adjacent to the position for collecting the information of the qualified compressor.
The utility model provides a clearance detection device between compressor rotor and stator, is including the power supply unit who is used for providing the compressor power, the acceleration sensor who is used for testing the compressor acceleration for judge whether qualified treater of clearance between compressor rotor and the stator and be used for the collection module of the compressor acceleration signal of developments collection acceleration sensor test, collection module set up between acceleration sensor and treater, divide into the acceleration information of different frequency sections through the treater to the dynamic signal of gathering.
Preferably, the acceleration sensor is an accelerometer.
Preferably, the acquisition module is a dynamic signal acquisition module.
Preferably, the processor is a computer.
Compared with the prior art, the invention researches the compressor with the gap between the rotor and the stator meeting the requirement and the compressor with the gap between the rotor and the stator not meeting the requirement, searches the difference between the rotor and the stator, develops a new method and a device for detecting the gap between the rotor and the stator of the compressor, does not need to drive the top cover of the compressor from the shell of the compressor, improves the judging efficiency of whether the gap between the rotor and the stator in the shell of the compressor meets the requirement or not, and saves the production cost; the principle that the rotating speed of the compressor is related to the gap between the rotor and the stator and the gap between the rotor and the stator in the compressor is different, so that the rotor is stressed unevenly in a magnetic field generated by the stator, and the generated acceleration is different is utilized to detect the compressor, during testing, only the acceleration sensor is needed to be attached to the shell of the compressor to collect the acceleration information of the compressor after no-load electrification, and whether the gap between the rotor and the stator in the compressor meets the requirement or not is judged according to the collected acceleration information of the compressor, so that the compressor cannot be damaged, the rework cost is reduced, the testing efficiency is improved, and the method is suitable for detecting the compressors in batches; meanwhile, the non-defective compressor which meets the requirement of the gap between the rotor and the stator can be prevented from being detected by the car top cover in the detection process, the top cover is welded after the gap between the rotor and the stator is detected, and the quality of a product is improved due to the risk that iron chips fall into the compressor during heavy work.
Drawings
Fig. 1 is a detection flowchart of a method for measuring a gap between a rotor and a stator of a compressor according to the present invention.
Fig. 2 is a schematic view of a gap measuring device between a rotor and a stator of a compressor according to the present invention.
Wherein, 1 a power supply device; 2, an acceleration sensor; 3, a processor; and 4, an acquisition module.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will further describe the present invention with reference to the accompanying drawings.
As shown in fig. 2, a gap detection device between a compressor rotor and a stator includes a power supply device 1 for providing a compressor power supply, an acceleration sensor 2 for testing acceleration of the compressor, a processor 3 for determining whether a gap between the compressor rotor and the stator is qualified, and an acquisition module 4 for dynamically acquiring a compressor acceleration signal tested by the acceleration sensor 2, where the acquisition module 4 is disposed between the acceleration sensor 2 and the processor 3, and decomposes the acquired dynamic signal into acceleration information of different frequency bands through the processor 3.
The device has the advantages of low cost, strong practicability and wide raw material source of equipment, and the acceleration sensor 2 is an acceleration gauge. The accelerometer can be sold in the current market and can acquire acceleration information. The processor 3 is a computer, and analysis software is installed in the computer, and the analysis software can intercept acceleration of the acquired signal under different frequency bands. The acquisition module 4 is sold on the market, can convert data into information of electric signals, and can dynamically acquire a dynamic signal acquisition module of compressor acceleration information tested by an acceleration gauge.
During testing, the power supply device 1 is connected with the compressor and supplies power to the compressor, the computer is connected with an external power supply, the acceleration gauge is attached to the fixed position of the shell of the compressor, and acceleration information of the compressor is tested in real time. The computer is internally provided with MATLAB Complier Runtime R2012a software which is the existing software. The dynamic signal acquisition module uses an NI USB-9234 signal acquisition card and an NI-DAQmx 9.4 driving program is installed in the acquisition card. The software can be realized by referring to the existing software for detecting the vibration and the noise of the compressor.
The MATLAB compiler Runtime R2012a software and the NI-DAQmx 9.4 driver installed in the acquisition card are all existing software programs, and are available in the market, which is not in the protection scope of the invention, and the dynamic signal acquisition module can use other dynamic signal acquisition modules with similar functions and capable of realizing the functions except for using an NI USB-9234 signal acquisition card, and the description is not made one by one again.
The invention also provides a method for detecting the gap between the rotor and the stator of the compressor, which is based on the device for detecting the gap between the rotor and the stator of the compressor in the above embodiment, and the flow of the specific method for detecting the gap is shown in fig. 1.
As shown in fig. 1, a method for detecting a gap between a rotor and a stator of a compressor includes the steps of:
s1, acquiring acceleration information of a frequency band of the compressor, wherein the gap between the rotors and the stators meets the requirement, the gap between the rotors and the stators does not meet the requirement; the method comprises the following specific steps:
s11, selecting a qualified compressor with a known qualified clearance between a plurality of rotors and a stator and a plurality of compressors with an unknown unqualified clearance, wherein the clearance of the compressor with the qualified clearance comprises the compressor with the qualified clearance with a lower limit value of the allowable clearance and the compressor with the qualified clearance with an upper limit value of the allowable clearance, and the compressor with the unqualified clearance is a defective product produced by a production line with the lower limit value of the allowable clearance.
S12, electrifying the compressor selected in the step 1 to enable the compressor to idle, measuring the acceleration information of the compressor by using an acceleration gauge at a fixed position of a shell of the compressor, and converting the acquired acceleration information into an analog power supply signal. The accelerometer transmits analog voltage signals output by simulation to the dynamic signal acquisition module.
S13, the dynamic signal acquisition module acquires the analog voltage signal output by the accelerometer and outputs the analog voltage signal into a digital signal for processing by the processor; the dynamic signal acquisition module can simultaneously acquire signals of the accelerating gauges of 4 channels to the maximum extent, and the number of the channels is selected according to the type of the selected accelerating gauge. The acceleration gauge can select acceleration information of a measuring single shaft and acceleration information of three shafts, and the corresponding channels of the dynamic signal acquisition module are used for connection according to the models of different acceleration gauges to acquire different acceleration information. When the acceleration gauge is a triaxial, the three-axial (radial, tangential and axial) acceleration of the same point of the compressor shell can be measured, and when the acceleration gauge is a uniaxial, the uniaxial acceleration of different positions of the compressor can be measured.
The S14 processor can process the digital signal transmitted by each channel of the dynamic signal acquisition module into the acceleration of a certain frequency band;
s15 compares the measured acceleration differences of the selected compressors with the known gaps being acceptable and the compressors with the gaps being unacceptable, and uses the acceleration of a frequency band with a significant difference as a reference value for subsequent testing of the compressor gap determination.
S2, the acceleration information of the compressor with obvious difference in a certain frequency band is recorded into a computer as reference information, and the acceleration information collected by the compressor to be tested is judged by taking the acceleration information as reference information.
S3, collecting the acceleration information of the compressor to be tested and comparing the acceleration information with the reference information, and judging whether the clearance between the rotor and the stator of the compressor is qualified or not, thereby determining whether the compressor is qualified or not. The method comprises the following specific steps:
acquiring acceleration information on a shell of a compressor to be tested, comparing the acquired acceleration information with reference information, and if the acquired acceleration information is greater than the reference information, judging that a gap between a rotor and a stator in the compressor does not meet the requirement, thereby judging that the compressor is an unqualified product;
and if the acquired acceleration information is less than or equal to the reference information, judging that the gap between the rotor and the stator in the compressor meets the requirement, and judging that the compressor is a qualified product.
In order to control the accuracy of the collected acceleration information and avoid the situation that the collected acceleration information on the compressor shell has large errors, the position of the acceleration information of the compressor shell to be tested, which is collected by using the acceleration gauge, is the same as or adjacent to the position of the acceleration information of the qualified compressor, namely the position of the acceleration information of the compressor shell to be tested is collected is the same as the position of the collected information of the qualified compressor, or the difference between the position of the acceleration information of the compressor shell to be tested and the position of the collected information of the qualified compressor is controlled within 3 times of the diameter of the acceleration gauge, so that the small errors of the collected acceleration information are ensured, and the judgment accuracy are improved.
The invention changes the traditional clearance test mode between the rotor and the stator, utilizes the principle that the rotating speed of the compressor is related to the clearance between the rotor and the stator, and because the clearance between the rotor and the stator in the compressor is different, the rotor is stressed unevenly in the magnetic field generated by the stator, so the generated acceleration is also different to detect the compressor. The device and the testing method of the invention are adopted to detect the clearance between the rotor and the stator in the compressor, the compressor is not damaged, the rework cost is reduced, the testing efficiency is improved, and the device and the testing method are suitable for batch compressor detection; meanwhile, the gap good products can be prevented from being welded after the gap is detected by the car roof, and the quality of products is improved due to the risk that scrap iron falls into the compressor during heavy work.
The signals of the four channels of the dynamic signal acquisition module in the above embodiment may be compressor acceleration information of the same frequency band, or may also be compressor acceleration information of different frequency bands, and are specifically adjusted according to real-time test requirements. Again, this will not be described in detail.
The above embodiments are merely specific implementations of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (8)
1. A method for detecting a gap between a rotor and a stator of a compressor, comprising the steps of:
s1, acquiring acceleration information of a certain frequency band of the compressor, wherein the gap between the rotors and the stators meets the requirement, and the gap between the rotors and the stators does not meet the requirement;
s2, recording the acceleration information of a certain frequency band of the compressor into the processor as reference information;
s3, acquiring the acceleration information of the compressor to be tested, wherein the frequency section of the acquired acceleration information of the compressor to be tested is the same as that of a certain frequency section in the step S1;
s4, comparing the acceleration information of the compressor to be tested with the reference information, and judging whether the clearance between the rotor and the stator of the compressor to be tested is qualified, thereby determining whether the compressor is qualified.
2. The method for detecting the clearance between the rotor and the stator of the compressor according to claim 1, wherein the step S1 comprises the following steps:
s11, selecting a qualified compressor with a plurality of known gaps between the rotor and the stator meeting the requirements and a plurality of known compressors with unqualified gaps;
s12, energizing the compressor selected in the step S11, and measuring the acceleration information of the compressor by using an acceleration sensor at the fixed position of the shell of the compressor;
s13, collecting dynamic acceleration information of the compressor measured by the acceleration sensor by using a collection module;
the S14 processor processes the collected dynamic acceleration information into acceleration information of a certain frequency band;
s15 uses the acceleration information of a certain frequency band in step S14 as the acceleration reference information for the subsequent test.
3. The method for detecting the clearance between the rotor and the stator of the compressor according to claim 1 or 2, wherein the step S3 is specifically performed by:
acquiring acceleration information on a shell of a compressor to be tested, comparing the acquired acceleration information with reference information, and if the acquired acceleration information is greater than the reference information, judging that a gap between a rotor and a stator in the compressor does not meet the requirement, thereby judging that the compressor is an unqualified product;
and if the acquired acceleration information is less than or equal to the reference information, judging that the gap between the rotor and the stator in the compressor meets the requirement, and judging that the compressor is a qualified product.
4. The method of claim 3, wherein the acceleration information of the compressor housing to be tested is collected at the same or adjacent position as the information of the known compressor.
5. A detection device for realizing the method for detecting the gap between the rotor and the stator of the compressor in claim 1 is characterized by comprising a power supply device (1) for providing power supply for the compressor, an acceleration sensor (2) for testing the acceleration of the compressor, a processor (3) for judging whether the gap between the rotor and the stator of the compressor is qualified or not and an acquisition module (4) for dynamically acquiring the acceleration signal of the compressor tested by the acceleration sensor (2), wherein the acquisition module (4) is arranged between the acceleration sensor (2) and the processor (3), and the acquired dynamic signal is decomposed into acceleration information of different frequency bands through the processor (3).
6. A device for detecting the clearance between the rotor and the stator of a compressor according to claim 5, characterized in that said acceleration sensor (2) is an accelerometer.
7. The clearance detecting device between the rotor and the stator of the compressor as claimed in claim 6, wherein the collecting module (4) is a dynamic signal collecting module.
8. The gap detection apparatus between a rotor and a stator of a compressor according to claim 7, wherein the processor (3) is a computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610893789.7A CN106403880B (en) | 2016-10-13 | 2016-10-13 | Method and device for detecting clearance between compressor rotor and stator |
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| CN201610893789.7A CN106403880B (en) | 2016-10-13 | 2016-10-13 | Method and device for detecting clearance between compressor rotor and stator |
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| CN106403880B true CN106403880B (en) | 2020-02-04 |
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| CN107607868B (en) * | 2017-09-08 | 2024-06-28 | Tcl瑞智（惠州）制冷设备有限公司 | Compressor stator lead length test experiment device and method |
| CN111288952B (en) * | 2020-03-16 | 2022-07-05 | 湖南米艾西测控技术有限公司 | Automatic centering adjusting tool for rotary transformer |
| CN114413725B (en) * | 2022-01-26 | 2023-09-01 | 株洲齿轮有限责任公司 | Method for judging stator assembly qualification on motor stator hot jacket assembly line |
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| EP2953242A1 (en) * | 2014-06-02 | 2015-12-09 | Kone Corporation | Axial flux permanent magnet motor condition monitoring |
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| CN1409887A (en) * | 1999-12-20 | 2003-04-09 | 西门子公司 | Method for monitoring radial gap between rotor and stator of electric generators and device for carrying out said method |
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