CN107167223B - Variable frequency air conditioner compressor and pipeline vibration testing system and method - Google Patents
Variable frequency air conditioner compressor and pipeline vibration testing system and method Download PDFInfo
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- CN107167223B CN107167223B CN201710539025.2A CN201710539025A CN107167223B CN 107167223 B CN107167223 B CN 107167223B CN 201710539025 A CN201710539025 A CN 201710539025A CN 107167223 B CN107167223 B CN 107167223B
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- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
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Abstract
The invention relates to an air conditioner compressor and a pipeline vibration testing technology. The invention provides a variable frequency air conditioner compressor and pipeline vibration test system, which aims to solve the problems that the maximum value of the vibration of the compressor and the pipeline system of the variable frequency air conditioner in the starting, running and stopping states is not effectively tested at present, so that the vibration level of the pipeline system of the variable frequency air conditioner is difficult to evaluate accurately, misjudgment, missed judgment and the like are easy to occur, and the technical scheme of the variable frequency air conditioner compressor and pipeline vibration test system can be summarized as follows: the vibration testing device comprises a compressor to be tested, a pipeline fixedly connected with the compressor to be tested, a vibration testing automatic control device, a first vibration sensor module, a second vibration sensor module, a vibration signal acquisition front end and a computer vibration signal automatic processing device. Here, the variable frequency compressor is controlled by the vibration test automatic control device to perform multiple point-by-point sweep operation and start and stop operation so as to effectively measure the maximum vibration values of the compressor and the pipeline. The invention has the beneficial effects that the testing process is automated, and the testing efficiency is improved.
Description
Technical Field
The invention relates to a variable frequency air conditioner technology, in particular to a technology of a variable frequency air conditioner compressor and pipeline vibration test system.
Background
In the production or test process of air conditioner products, vibration test and objective evaluation are required to be carried out on the outdoor unit pipeline system, the maximum value of vibration of the compressor pipeline system of the variable frequency air conditioner in the starting, running and stopping states is required to be tested, but no effective variable frequency air conditioner pipeline vibration test system exists at present. In order to accurately evaluate the vibration level of the pipeline system of the variable frequency air conditioner, avoid the phenomena of misjudgment, missed judgment and the like, how to more accurately test the maximum value of the vibration of the pipeline system of the compressor of the variable frequency air conditioner in the starting, running and stopping states becomes the primary problem of technicians.
Disclosure of Invention
The invention aims to provide a variable frequency air conditioner compressor and pipeline vibration testing system and method, which solve the problems that the maximum value of the compressor and pipeline system vibration of a variable frequency air conditioner in the starting, running and stopping states cannot be effectively tested at present, so that the vibration level of the variable frequency air conditioner pipeline system is difficult to evaluate accurately, and the phenomena of misjudgment, missed judgment and the like are easy to occur.
The invention solves the technical problems and adopts the following technical scheme: the variable frequency air conditioner compressor and pipeline vibration test system comprises a compressor to be tested and a pipeline fixedly connected with the compressor to be tested, and is characterized by further comprising a vibration test automatic control device, a first vibration sensor module, a second vibration sensor module, a vibration signal acquisition front end and a computer vibration signal automatic processing device, wherein the first vibration sensor module is connected with the vibration test automatic control device, the second vibration sensor module is connected with the vibration test automatic control device, the vibration test automatic control device is connected with the computer vibration signal automatic processing device through the vibration signal acquisition front end, the first vibration sensor module is arranged at a vibration test monitoring point of the compressor to be tested, and the second vibration sensor module is arranged at a vibration test monitoring point of the pipeline connected with the compressor to be tested;
the vibration test automatic control device is used for controlling the compressor to be tested to perform multiple point-by-point sweep operation, and starting and stopping operation;
the first vibration sensor module is used for collecting vibration signals of the compressor to be tested in all states and transmitting the vibration signals to the front end of vibration signal collection;
the second vibration sensor module is used for collecting vibration signals of a pipeline connected with the compressor to be tested in all states and transmitting the vibration signals to the front end of vibration signal collection;
the vibration signal acquisition front end converts the vibration signal into a digital signal and then transmits the digital signal to the automatic processing device of the computer vibration signal;
the data automatic processing module in the computer vibration signal automatic processing device processes the digital signals, calculates the maximum vibration values corresponding to the vibration test monitoring points at different frequency points, and outputs the maximum vibration values and the average vibration values in the starting state, the maximum vibration values and the average vibration values in the stopping state.
Further, the vibration test monitoring points of the compressor to be tested are the position of the pipe orifice of the air suction pipe and the position of the pipe orifice of the air discharge pipe of the compressor to be tested, and the vibration test monitoring points of the pipeline fixedly connected with the compressor to be tested are the first bent position of the lower end of the air suction pipe of the compressor to be tested and the first bent position of the lower end of the air discharge pipe pipeline.
Further, two mutually perpendicular vibration sensors are respectively arranged at the position of the pipe orifice of the air suction pipe and the position of the pipe orifice of the air discharge pipe of the compressor to be tested, and two mutually perpendicular vibration sensors are respectively arranged at the first bent position of the lower end of the air suction pipe of the compressor to be tested and the first bent position of the lower end of the air discharge pipe.
Further, the first vibration sensor module comprises a first vibration sensor, a second vibration sensor, a third vibration sensor and a fourth vibration sensor, the second vibration sensor module comprises a fifth vibration sensor, a sixth vibration sensor, a seventh vibration sensor and an eighth vibration sensor, the two vibration sensors arranged at the pipe orifice position of the air suction pipe of the compressor to be tested are respectively a first vibration sensor and a second vibration sensor, the first vibration sensor is arranged at the pipe orifice position of the air suction pipe, the direction is the connecting line direction of the pipe orifice of the air suction pipe and the pipe orifice of the exhaust pipe, the second vibration sensor is correspondingly arranged in the direction vertical to the direction of the first vibration sensor, the two vibration sensors arranged at the pipe orifice position of the exhaust pipe of the compressor to be tested are respectively a third vibration sensor and a fourth vibration sensor, the third vibration sensor is arranged at the pipe orifice position of the exhaust pipe, the direction is the connecting line direction of the pipe orifice of the exhaust pipe and the pipe orifice of the air suction pipe, the fourth vibration sensor is correspondingly arranged in the direction perpendicular to the direction of the third vibration sensor, the two vibration sensors arranged at the first bending position of the lower end of the air suction pipe of the compressor to be detected are respectively a fifth vibration sensor and a sixth vibration sensor, the fifth vibration sensor is arranged at the first bending position of the lower end of the air suction pipe and along the tangential direction of the rotation of the compressor, the sixth vibration sensor is correspondingly arranged in the direction perpendicular to the direction of the fifth vibration sensor, the two vibration sensors arranged at the first bending position of the lower end of the air suction pipe of the compressor to be detected are respectively a seventh vibration sensor and an eighth vibration sensor, the seventh vibration sensor is arranged at the first bending position of the lower end of the air suction pipe and along the tangential direction of the rotation of the compressor, the eighth vibration sensor is correspondingly arranged in a direction perpendicular to the direction of the seventh vibration sensor.
Further, the vibration test automatic control device is used for controlling the compressor to be tested to perform multiple point-by-point sweep operation and start and stop operation.
Further, the processing of the logarithmic signal includes an interference process and an FFT spectrum analysis process.
Further, the maximum vibration values of the vibration test monitoring points corresponding to the vibration test monitoring points at different frequency points, the average vibration value of the maximum vibration values in the starting state and the average vibration value of the maximum vibration values in the stopping state are calculated according to the vibration values of two mutually perpendicular vibration sensors at the vibration test monitoring points.
Further, the vibration sensor is an acceleration sensor.
The frequency conversion air conditioner compressor and pipeline vibration testing method is applied to the frequency conversion air conditioner compressor and pipeline vibration testing system and is characterized by comprising the following steps of:
a. determining vibration test monitoring points of the compressor to be tested as the pipe orifice position of the air suction pipe of the compressor and the pipe orifice position of the air discharge pipe;
b. determining vibration test monitoring points of a pipeline fixedly connected with a compressor to be tested as a first bent position of the lower end of an air suction pipe pipeline of the compressor to be tested and a first bent position of the lower end of an air discharge pipe pipeline;
c. in the determined vibration test monitoring points, the direction of a sensor at the pipe orifice position of the air suction pipe of the compressor is the connecting line direction of the pipe orifice of the air suction pipe and the vertical direction of the connecting line direction, and the direction of the sensor at the bent position of the lower end of the pipe of the air suction pipe is the tangential direction of the rotation of the compressor and the vertical direction of the tangential direction;
d. the method comprises the steps of controlling a compressor to be tested to perform multiple point-by-point sweep operation, and starting and stopping operation through a vibration test automatic control device;
e. the vibration sensor acquires vibration signals of the compressor and the pipeline to be tested in all states and transmits the vibration signals to the front end of vibration signal acquisition;
f. the vibration signal acquisition front end converts the vibration signal into a digital signal and then transmits the digital signal to the automatic processing system of the computer vibration signal;
g. the data automatic processing module in the computer vibration signal automatic processing system processes the digital signals, calculates the maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in a starting state and the average vibration value of the maximum vibration value in a stopping state, and finally automatically outputs the calculated maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in the starting state and the average vibration value of the maximum vibration value in the stopping state.
Further, in step g, the processing of the logarithmic signal includes interference processing and FFT spectrum analysis processing.
The vibration testing system and the vibration testing method for the compressor and the pipeline of the variable frequency air conditioner have the advantages that the maximum vibration position of the compressor and the pipeline system of the variable frequency air conditioner is determined, meanwhile, the variable frequency compressor is controlled by the vibration testing automatic control device to perform point-by-point sweep operation, start and stop operation for multiple times, the vibration maximum value of the compressor and the pipeline is effectively measured, the tested vibration maximum value is more substantial in vibration of the pipeline system of the variable frequency air conditioner, the vibration characteristics of the compressor and the pipeline refrigerating system in the working process of the variable frequency air conditioner can be accurately tested and evaluated, and the vibration testing automatic control device is used to standardize and automate the testing process, so that human interference is avoided, the testing efficiency is improved, and the testing difficulty is reduced.
Drawings
Fig. 1 is a block diagram of the structure of the present invention.
FIG. 2 is a schematic front view of a compressor and piping to be tested according to an embodiment.
FIG. 3 is a schematic back view of a compressor and piping to be tested according to an embodiment.
Fig. 4 is a schematic diagram of a fixed direction of an acceleration sensor according to an embodiment.
Wherein, 1 is the compressor to be tested, 2 is the pipeline, A is the direction of connecting the mouth of the air suction pipe with the mouth of the air discharge pipe, B is the direction vertical to the A direction, C is the tangential direction of the rotation of the compressor, D is the direction vertical to the C direction, N1 is the mouth of the air suction pipe of the compressor to be tested, N2 is the mouth of the air discharge pipe of the compressor to be tested, N3 is the first bent position of the lower end of the air discharge pipe of the compressor to be tested, and N4 is the first bent position of the lower end of the air suction pipe of the compressor to be tested.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and the embodiments.
The invention relates to a variable frequency air conditioner compressor and pipeline vibration test system, which consists of a compressor 1 to be tested, a pipeline 2 fixedly connected with the compressor, a vibration test automatic control device, a first vibration sensor module, a second vibration sensor module, a vibration signal acquisition front end and a computer vibration signal automatic processing device, wherein the structural block diagram is shown in figure 1, the first vibration sensor module is connected with the vibration test automatic control device, the second vibration sensor module is connected with the vibration test automatic control device, the vibration test automatic control device is connected with the computer vibration signal automatic processing device through the vibration signal acquisition front end, the first vibration sensor module is arranged at a vibration test monitoring point of the compressor 1 to be tested, and the second vibration sensor module is arranged at the vibration test monitoring point of the pipeline 2 connected with the compressor 1 to be tested;
the vibration test automatic control device is used for controlling the compressor 1 to be tested to perform multiple point-by-point sweep operation, and starting and stopping operation;
the first vibration sensor module is used for collecting vibration signals of the compressor 1 to be tested in all states and transmitting the vibration signals to the front end of vibration signal collection;
the second vibration sensor module is used for collecting vibration signals of the pipeline 2 connected with the compressor 1 to be tested in all states and transmitting the vibration signals to the front end of vibration signal collection;
the data automatic processing module in the computer vibration signal automatic processing device processes the digital signals, calculates the maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in a starting state and the average vibration value of the maximum vibration value in a stopping state, and finally outputs automatically.
The vibration testing method for the variable frequency air conditioner compressor and the pipeline system is applied to the variable frequency air conditioner compressor and the pipeline vibration testing system, and comprises the following steps of:
a. determining vibration test monitoring points of the compressor 1 to be tested as a pipe orifice position N1 of an air suction pipe of the compressor and a pipe orifice position N2 of an air discharge pipe;
b. the vibration test monitoring point of the pipeline 2 fixedly connected with the compressor 1 to be tested is determined to be a first bending position N4 of the lower end of the air suction pipe pipeline of the compressor 1 to be tested and a first bending position N3 of the lower end of the air discharge pipe pipeline;
c. in the determined vibration test monitoring points, the direction of a sensor at the pipe orifice position of the air suction pipe of the compressor is the connecting line direction of the pipe orifice of the air suction pipe and the vertical direction of the connecting line direction, and the direction of the sensor at the bent position of the lower end of the pipe of the air suction pipe is the tangential direction of the rotation of the compressor and the vertical direction of the tangential direction;
d. the compressor 1 to be tested is controlled to perform multiple point-by-point sweep operation, start and stop operation through the vibration test automatic control device;
e. the vibration sensor acquires vibration signals of the compressor 1 to be tested and the pipeline 2 in all states and transmits the vibration signals to the front end of vibration signal acquisition;
f. the vibration signal acquisition front end converts the vibration signal into a digital signal and then transmits the digital signal to the automatic processing system of the computer vibration signal;
g. the data automatic processing module in the computer vibration signal automatic processing system processes the digital signals, calculates the maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in a starting state and the average vibration value of the maximum vibration value in a stopping state, and finally automatically outputs the calculated maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in the starting state and the average vibration value of the maximum vibration value in the stopping state.
Examples
The vibration testing system for the compressor and the pipeline of the variable frequency air conditioner of the embodiment comprises a compressor 1 to be tested, a pipeline 2 fixedly connected with the compressor, an automatic vibration testing control device, a first vibration sensor module, a second vibration sensor module, a vibration signal acquisition front end and an automatic computer vibration signal processing device, wherein the front schematic diagram of the compressor and the pipeline to be tested is shown in fig. 2, and the back schematic diagram of the compressor and the pipeline to be tested is shown in fig. 3.
The first vibration sensor module is connected with the vibration test automatic control device, the second vibration sensor module is connected with the vibration test automatic control device, the vibration test automatic control device is connected with the computer vibration signal automatic processing device through the vibration signal acquisition front end, the first vibration sensor module is arranged at a vibration test monitoring point of the compressor 1 to be tested, and the second vibration sensor module is arranged at a vibration test monitoring point of the pipeline 2 connected with the compressor 1 to be tested;
the vibration test automatic control device is used for controlling the compressor 1 to be tested to perform multiple point-by-point sweep operation, and starting and stopping operation;
the first vibration sensor module is used for collecting vibration signals of the compressor 1 to be tested in all states and transmitting the vibration signals to the front end of vibration signal collection;
the second vibration sensor module is used for collecting vibration signals of the pipeline 2 connected with the compressor 1 to be tested in all states and transmitting the vibration signals to the front end of vibration signal collection;
the vibration signal acquisition front end converts the vibration signal into a digital signal and then transmits the digital signal to the automatic processing device of the computer vibration signal;
the data automatic processing module in the computer vibration signal automatic processing device processes the digital signals, calculates the maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in a starting state and the average vibration value of the maximum vibration value in a stopping state, and finally outputs automatically.
In the system, vibration test monitoring points of the compressor 1 to be tested are an air suction pipe orifice position N1 and an air discharge pipe orifice position N2 of the compressor to be tested, and vibration test monitoring points of a pipeline 2 fixedly connected with the compressor 1 to be tested are a first bending position N4 of the air suction pipe pipeline lower end of the compressor to be tested and a first bending position N3 of the air discharge pipe pipeline lower end of the compressor to be tested.
The position N1 of the air suction pipe orifice of the compressor 1 to be tested and the position N2 of the air discharge pipe orifice are respectively provided with two vibration sensors which are perpendicular to each other, and the first bending position N4 of the lower end of the air suction pipe pipeline of the compressor 1 to be tested and the first bending position N3 of the lower end of the air discharge pipe pipeline are respectively provided with two vibration sensors which are perpendicular to each other.
The first vibration sensor module comprises a first vibration sensor, a second vibration sensor, a third vibration sensor and a fourth vibration sensor, the second vibration sensor module comprises a fifth vibration sensor, a sixth vibration sensor, a seventh vibration sensor and an eighth vibration sensor, the two vibration sensors arranged at the pipe opening position N1 of the air suction pipe of the compressor 1 to be tested are respectively the first vibration sensor and the second vibration sensor, the first vibration sensor is arranged at the pipe opening position N1 of the air suction pipe, the direction is the connecting line direction A of the pipe opening of the air suction pipe, the second vibration sensor is correspondingly arranged in the direction B perpendicular to the direction of the first vibration sensor, the two vibration sensors arranged at the pipe opening position N2 of the air suction pipe of the compressor 1 to be tested are respectively the third vibration sensor and the fourth vibration sensor, the third vibration sensor is arranged at the pipe opening position N2 of the air suction pipe, the direction is the connecting line direction A of the air suction pipe, the fourth vibration sensor is correspondingly arranged at the direction B perpendicular to the third vibration sensor, the first vibration sensor is arranged at the lower end of the pipeline of the compressor 1 to be tested, the second vibration sensor is correspondingly arranged at the lower end of the fifth vibration sensor is arranged at the tangential line of the air suction pipe, the fifth vibration sensor is arranged at the lower end of the pipeline C perpendicular to the fifth vibration sensor is arranged at the tangential direction C of the fifth vibration sensor, the fifth vibration sensor is correspondingly arranged at the lower end of the pipeline C of the pipeline to be tested, the fifth vibration sensor is arranged at the tangential line of the fifth vibration sensor is arranged at the end of the pipeline C is the pipeline, and the vibration sensor is respectively the vibration sensor is arranged at the tangential end of the fifth vibration sensor is arranged at the pipeline is the vibration sensor is arranged at the pipeline is the pipeline, the eighth vibration sensor is correspondingly arranged in a direction D perpendicular to the direction of the seventh vibration sensor.
The vibration test automatic control device is used for controlling the compressor 1 to be tested to perform multiple point-by-point sweep operation and starting and stopping operation.
The processing of the numerical signal includes interference processing and FFT spectral analysis processing.
The maximum vibration values of the vibration test monitoring points corresponding to the vibration test monitoring points at different frequency points, the average vibration value of the maximum vibration values in the starting state and the average vibration value of the maximum vibration values in the stopping state are calculated according to the vibration values of two mutually perpendicular vibration sensors at the vibration test monitoring points.
The vibration sensor is an acceleration sensor.
The frequency conversion air conditioner compressor and pipeline vibration testing method is applied to the frequency conversion air conditioner compressor and pipeline vibration testing system and comprises the following steps:
a. determining vibration test monitoring points of the compressor 1 to be tested as a pipe orifice position N1 of an air suction pipe of the compressor and a pipe orifice position N2 of an air discharge pipe;
b. the vibration test monitoring point of the pipeline 2 fixedly connected with the compressor 1 to be tested is determined to be a first bending position N4 of the lower end of the air suction pipe pipeline of the compressor 1 to be tested and a first bending position N3 of the lower end of the air discharge pipe pipeline;
c. in the determined vibration test monitoring points, the direction of a sensor at the pipe orifice position of the air suction pipe of the compressor is the connecting line direction of the pipe orifice of the air suction pipe and the vertical direction of the connecting line direction, and the direction of the sensor at the bent position of the lower end of the pipe of the air suction pipe is the tangential direction of the rotation of the compressor and the vertical direction of the tangential direction;
d. the compressor 1 to be tested is controlled to perform multiple point-by-point sweep operation, start and stop operation through the vibration test automatic control device;
e. the vibration sensor acquires vibration signals of the compressor 1 to be tested and the pipeline 2 in all states and transmits the vibration signals to the front end of vibration signal acquisition;
f. the vibration signal acquisition front end converts the vibration signal into a digital signal and then transmits the digital signal to the automatic processing system of the computer vibration signal;
g. the data automatic processing module in the computer vibration signal automatic processing device processes the digital signal, calculates the maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in the starting state and the average vibration value of the maximum vibration value in the stopping state, and finally automatically outputs the calculated maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in the starting state and the average vibration value of the maximum vibration value in the stopping state.
In the above method step g, the processing of the digital signal includes interference processing and FFT spectrum analysis processing.
In practical application, the compressor and pipeline vibration testing system of the variable frequency air conditioner can achieve the following effects:
the acceleration sensor is respectively fixed at the pipe orifice position N1 of the air suction pipe and the pipe orifice position N2 of the air discharge pipe of the compressor 1 to be tested, and the first bending position N4 of the lower end of the air suction pipe and the first bending position N3 of the lower end of the air discharge pipe are used for more accurately testing the maximum vibration values of the compressor 1 and the pipeline 2, and the acceleration sensor is specifically fixed at the two vertical directions at each monitoring point.
The specific fixing direction of the acceleration vibration sensor is shown in fig. 4, two acceleration sensors are fixed on each monitoring point, and the two acceleration vibration sensors are as follows: for example, one of the positions N1 of the mouth of the air suction pipe is fixed in the direction A of the connecting line of the mouth of the air suction pipe and the mouth of the air discharge pipe, the other is fixed in the direction B perpendicular to the direction A, and the vibration value of the direction A can be measured to be A by the fixing mode of the sensor A The vibration value in the direction B is A B The data automatic processing module in the computer vibration signal automatic processing device can automatically calculate the maximum vibration value A of the test point according to the following formula:
the variable frequency air conditioner is controlled to start, operate and stop through the vibration test automatic control deviceThe vibration test of the running process is carried out in a point-by-point frequency sweeping mode, namely, the variable frequency air conditioner is controlled by the vibration test automatic control device to run from the lowest running frequency of the electric control to the highest frequency point by point at certain time intervals, and a data automatic processing module in the computer vibration signal automatic processing device can automatically calculate and obtain the maximum vibration value of each test point under each frequency point, for example, the test data of the test point N1 is as follows: the maximum vibration value in the starting state is
Maximum vibration value in stop state is
The maximum vibration value of each frequency point in the running state is +.>
Wherein m is the number of frequency points in the running state. />
Claims (7)
1. The variable frequency air conditioner compressor and pipeline vibration test system comprises a compressor to be tested and a pipeline fixedly connected with the compressor to be tested, and is characterized by further comprising a vibration test automatic control device, a first vibration sensor module, a second vibration sensor module, a vibration signal acquisition front end and a computer vibration signal automatic processing device, wherein the first vibration sensor module is connected with the vibration test automatic control device, the second vibration sensor module is connected with the vibration test automatic control device, the vibration test automatic control device is connected with the computer vibration signal automatic processing device through the vibration signal acquisition front end, and the first vibration sensor module is arranged at a vibration test monitoring point of the compressor to be tested; the vibration test monitoring points of the compressor to be tested are the position of the pipe orifice of the air suction pipe and the position of the pipe orifice of the air discharge pipe of the compressor to be tested; two mutually perpendicular vibration sensors are respectively arranged at the position of the orifice of the air suction pipe and the position of the orifice of the air discharge pipe of the compressor to be tested; the second vibration sensor module is arranged at a vibration test monitoring point of a pipeline connected with the compressor to be tested; the vibration test monitoring points of the pipeline fixedly connected with the compressor to be tested are a first bent position at the lower end of the air suction pipe pipeline of the compressor to be tested and a first bent position at the lower end of the air discharge pipe pipeline; two mutually perpendicular vibration sensors are respectively arranged at the first bending position of the lower end of the air suction pipe of the compressor to be tested and the first bending position of the lower end of the air exhaust pipe;
the vibration test automatic control device is used for controlling the compressor to be tested to perform multiple point-by-point sweep operation, and starting and stopping operation;
the first vibration sensor module is used for collecting vibration signals of the compressor to be tested in all states and transmitting the vibration signals to the front end of vibration signal collection; the first vibration sensor module comprises a first vibration sensor, a second vibration sensor, a third vibration sensor and a fourth vibration sensor; the two vibration sensors arranged at the position of the pipe orifice of the air suction pipe of the compressor to be tested are a first vibration sensor and a second vibration sensor respectively, the first vibration sensor is arranged at the position of the pipe orifice of the air suction pipe, the direction is the connecting line direction of the pipe orifice of the air suction pipe and the pipe orifice of the air suction pipe, the second vibration sensor is correspondingly arranged in the direction perpendicular to the direction of the first vibration sensor, the two vibration sensors arranged at the position of the pipe orifice of the air suction pipe of the compressor to be tested are a third vibration sensor and a fourth vibration sensor respectively, the third vibration sensor is arranged at the position of the pipe orifice of the air suction pipe, the direction is the connecting line direction of the pipe orifice of the air suction pipe and the pipe orifice of the air suction pipe, and the fourth vibration sensor is correspondingly arranged in the direction perpendicular to the direction of the third vibration sensor;
the second vibration sensor module is used for collecting vibration signals of a pipeline connected with the compressor to be tested in all states and transmitting the vibration signals to the front end of vibration signal collection; the second vibration sensor module includes a fifth vibration sensor, a sixth vibration sensor, a seventh vibration sensor, and an eighth vibration sensor; the two vibration sensors arranged at the first bending position of the lower end of the air suction pipe of the compressor to be detected are a fifth vibration sensor and a sixth vibration sensor respectively, the fifth vibration sensor is arranged at the first bending position of the lower end of the air suction pipe and along the tangential direction of the rotation of the compressor, the sixth vibration sensor is correspondingly arranged in the direction vertical to the direction of the fifth vibration sensor, the two vibration sensors arranged at the first bending position of the lower end of the air suction pipe of the compressor to be detected are a seventh vibration sensor and an eighth vibration sensor respectively, the seventh vibration sensor is arranged at the first bending position of the lower end of the air suction pipe and along the tangential direction of the rotation of the compressor, and the eighth vibration sensor is correspondingly arranged in the direction vertical to the direction of the seventh vibration sensor;
the vibration signal acquisition front end converts the vibration signal into a digital signal and then transmits the digital signal to the automatic processing device of the computer vibration signal;
the data automatic processing module in the computer vibration signal automatic processing device processes the digital signals, calculates the maximum vibration values corresponding to the vibration test monitoring points at different frequency points, the average vibration value of the maximum vibration values in the starting state and the average vibration value of the maximum vibration values in the stopping state, and finally automatically outputs the maximum vibration values.
2. The variable frequency air conditioner compressor and pipeline vibration testing system according to claim 1, wherein the vibration testing automatic control device is used for controlling the compressor to be tested to perform multiple point-by-point sweep operation and start-up and stop operation.
3. The variable frequency air conditioner compressor and line vibration testing system according to claim 2, wherein the processing of the digital signal includes an interference process and an FFT spectrum analysis process.
4. The variable frequency air conditioner compressor and pipeline vibration testing system according to claim 3, wherein the maximum vibration values corresponding to the vibration testing monitoring points at different frequency points, the average vibration value of the maximum vibration values in the starting state and the average vibration value of the maximum vibration values in the stopping state are calculated according to the vibration values of two vibration sensors perpendicular to each other at the vibration testing monitoring points.
5. The variable frequency air conditioner compressor and pipeline vibration testing system according to any one of claims 1-4, wherein the vibration sensor is an acceleration sensor.
6. The method for testing the vibration of the compressor and the pipeline of the variable frequency air conditioner is applied to the system for testing the vibration of the compressor and the pipeline of the variable frequency air conditioner according to any one of claims 1 to 5, and is characterized by comprising the following steps:
a. determining vibration test monitoring points of the compressor to be tested as the pipe orifice position of the air suction pipe of the compressor and the pipe orifice position of the air discharge pipe;
b. determining vibration test monitoring points of a pipeline fixedly connected with a compressor to be tested as a first bent position of the lower end of an air suction pipe pipeline of the compressor to be tested and a first bent position of the lower end of an air discharge pipe pipeline;
c. in the determined vibration test monitoring points, the direction of a sensor at the pipe orifice position of the air suction pipe of the compressor is the connecting line direction of the pipe orifice of the air suction pipe and the vertical direction of the connecting line direction, and the direction of the sensor at the bent position of the lower end of the pipe of the air suction pipe is the tangential direction of the rotation of the compressor and the vertical direction of the tangential direction;
d. the method comprises the steps of controlling a compressor to be tested to perform multiple point-by-point sweep operation, and starting and stopping operation through a vibration test automatic control device;
e. the vibration sensor acquires vibration signals of the compressor and the pipeline to be tested in all states and transmits the vibration signals to the front end of vibration signal acquisition;
f. the vibration signal acquisition front end converts the vibration signal into a digital signal and then transmits the digital signal to the automatic processing system of the computer vibration signal;
g. the data automatic processing module in the computer vibration signal automatic processing device processes the digital signal, calculates the maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in the starting state and the average vibration value of the maximum vibration value in the stopping state, and finally automatically outputs the calculated maximum vibration value corresponding to each vibration test monitoring point at different frequency points, the average vibration value of the maximum vibration value in the starting state and the average vibration value of the maximum vibration value in the stopping state.
7. The variable frequency air conditioner compressor and pipeline vibration testing method according to claim 6, wherein in the step g, the processing of the logarithmic signal includes an interference processing and an FFT spectrum analysis processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710539025.2A CN107167223B (en) | 2017-07-04 | 2017-07-04 | Variable frequency air conditioner compressor and pipeline vibration testing system and method |
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| CN108506216B (en) * | 2018-03-23 | 2020-01-10 | 四川长虹空调有限公司 | Vibration reduction design method for suction and exhaust pipelines of rotor type compressor |
| CN110470494A (en) * | 2018-05-11 | 2019-11-19 | 浙江盾安人工环境股份有限公司 | A kind of monitoring of air-conditioning vibration and diagnostic method |
| CN110779612A (en) * | 2019-11-13 | 2020-02-11 | 深圳天祥质量技术服务有限公司 | Method and device for measuring pipeline of refrigeration system |
| CN113513814A (en) * | 2021-04-09 | 2021-10-19 | 珠海格力电器股份有限公司 | Compressor operation control method and device, air conditioning equipment and storage medium |
| CN113865687B (en) * | 2021-08-31 | 2024-02-20 | 青岛海尔空调器有限总公司 | Pipeline vibration testing device |
| CN113982929B (en) * | 2021-09-26 | 2024-05-24 | 约克（无锡）空调冷冻设备有限公司 | Vibration frequency adjusting system |
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