CN111121948B - Method for detecting vibration characteristic of air handling unit - Google Patents
Method for detecting vibration characteristic of air handling unit Download PDFInfo
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- CN111121948B CN111121948B CN202010006249.9A CN202010006249A CN111121948B CN 111121948 B CN111121948 B CN 111121948B CN 202010006249 A CN202010006249 A CN 202010006249A CN 111121948 B CN111121948 B CN 111121948B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H5/00—Measuring propagation velocity of ultrasonic, sonic or infrasonic waves, e.g. of pressure waves
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
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Abstract
The invention discloses a method for detecting vibration characteristics of an air handling unit, which comprises the following steps of A1: starting an air treatment unit; step A2: calculating the air volume and the external static pressure of the air handling unit in a standard air state, and judging the state of the air handling unit running in a rated air volume and the external static pressure; step A3: installing a static pressure detection air pipe on the air handling unit, wherein the reading of a power meter under the detection of the static pressure detection air pipe is equal to the reading of the power meter under the detection of an air quantity detection air pipe, and judging the state of the air handling unit under the rated air quantity and the external static pressure; step A4: and detecting the vibration speeds in the vertical direction and the horizontal direction of the corresponding positions through the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor, and simultaneously recording the corresponding values of the data of the vibration speeds. The invention can accurately detect the influence of the vibration of the air conditioning unit on the transmission of the surrounding ground by the damping device.
Description
Technical Field
The invention relates to the technical field of air handling units, in particular to a method for detecting vibration characteristics of an air handling unit.
Background
At present, some countries require auxiliary equipment (such as an air handling unit) to reduce vibration transmission to the ground to be below 150 nanometers (within the range of vibration frequency of 1-100 Hz) in high, precise, sharp and top-secret laboratories, but the existing detection method cannot accurately detect and judge the vibration transmission influence of the air handling unit in advance before the air handling unit is in place, so that the detection method of the detection equipment for detecting the vibration characteristic is of great importance.
Disclosure of Invention
In view of the above problems of the conventional detection methods, it is an object of the present invention to provide a method for detecting vibration characteristics of an air handling unit, which can accurately detect the influence of vibration of the air handling unit on the surrounding ground after using a vibration damping device.
The specific technical scheme is as follows:
a detection method for vibration characteristics of an air handling unit is suitable for a detection platform and a detection device;
the detection platform comprises:
the base platform is arranged on the ground, and the air handling unit is arranged on the base platform;
the first shock pad is arranged between the foundation platform and the ground;
the second shock pad is arranged between the air handling unit and the base platform;
the detection device includes:
one end of the air quantity detection air pipe is connected with the air handling unit;
one end of the static pressure detection air pipe is connected with the air handling unit;
the first magnetoelectric speed sensor is arranged on the base platform and is positioned at the end part of one end of the air handling unit;
the second magnetoelectric speed sensor is arranged on the ground and is positioned at the end part of one end of the basic platform;
the third magnetoelectric speed sensor is arranged on the ground and is positioned at one end of the second magnetoelectric speed sensor, which is far away from the first magnetoelectric speed sensor, and a distance is formed between the third magnetoelectric speed sensor and the second magnetoelectric speed sensor;
the dynamic signal acquisition system is in signal connection with the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor respectively;
the detection method is a daytime detection method, and comprises the following steps:
step A1: installing the air volume detection air pipe on the air handling unit, electrifying the air handling unit, and starting the air handling unit;
step A2: adjusting a cone of a throttling device, detecting the external static pressure at a static pressure ring of an air quantity detection air pipe by an electronic micro-manometer of the air quantity detection air pipe, detecting the dynamic pressure at a dynamic pressure hole of the air quantity detection air pipe by the electronic micro-manometer of the air quantity detection air pipe and a pitot tube of the air quantity detection air pipe, detecting the dry bulb temperature in the air quantity detection air pipe by a thermometer of the air quantity detection air pipe, detecting the relative humidity at an air outlet of the air handling unit by a humidity sensor, detecting the atmospheric pressure by an atmospheric pressure meter, detecting the input power of the air handling unit by a power meter, calculating the air quantity of the air handling unit and the external static pressure in a standard air state by the external static pressure, the dynamic pressure, the dry bulb temperature, the relative humidity and the atmospheric pressure, and judging the state of the air handling unit running at the rated air quantity and the external static pressure, recording a reading of the power meter;
step A3: the air handling unit is powered off, the air quantity detection air pipe is taken down from the air handling unit, the static pressure detection air pipe is installed on the air handling unit, the air handling unit is powered on, the air handling unit is started, an electronic micro-pressure meter of the static pressure detection air pipe detects that the external static pressure is equal to the external static pressure detected by the electronic micro-pressure meter of the air quantity detection air pipe through an adjusting valve of the static pressure detection air pipe, the reading of the power meter is observed at the same time, the reading of the power meter detected by the static pressure detection air pipe is equal to the reading of the power meter detected by the air quantity detection air pipe, and the state of the air handling unit running under rated air quantity and external static pressure is judged;
step A4: the vibration speeds in the vertical direction and the horizontal direction of the basic platform are detected through the first magnetoelectric speed sensor to obtain a measuring point P1, the vibration speeds in the vertical direction and the horizontal direction on the ground are detected through the second magnetoelectric speed sensor to obtain a measuring point P2, the vibration speeds in the vertical direction and the horizontal direction on the ground are detected through the third magnetoelectric speed sensor to obtain a measuring point P3, meanwhile, data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, and the dynamic signal acquisition system continuously records corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3.
A detection method for vibration characteristics of an air handling unit is suitable for a detection platform and a detection device;
the detection platform comprises:
the base platform is arranged on the ground, and the air handling unit is arranged on the base platform;
the first shock pad is arranged between the foundation platform and the ground;
the second shock pad is arranged between the air handling unit and the base platform;
the detection device includes:
one end of the air quantity detection air pipe is connected with the air handling unit;
one end of the static pressure detection air pipe is connected with the air handling unit;
the first magnetoelectric speed sensor is arranged on the base platform and is positioned at the end part of one end of the air handling unit;
the second magnetoelectric speed sensor is arranged on the ground and is positioned at the end part of one end of the basic platform;
the third magnetoelectric speed sensor is arranged on the ground and is positioned at one end of the second magnetoelectric speed sensor, which is far away from the first magnetoelectric speed sensor, and a distance is formed between the third magnetoelectric speed sensor and the second magnetoelectric speed sensor;
the dynamic signal acquisition system is in signal connection with the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor respectively;
the detection method is a night detection method, and comprises the following steps:
step B1: installing the air volume detection air pipe on the air handling unit, electrifying the air handling unit, and starting the air handling unit;
step B2: adjusting a cone of a throttling device, detecting the external static pressure at a static pressure ring of an air quantity detection air pipe by an electronic micro-manometer of the air quantity detection air pipe, detecting the dynamic pressure at a dynamic pressure hole of the air quantity detection air pipe by the electronic micro-manometer of the air quantity detection air pipe and a pitot tube of the air quantity detection air pipe, detecting the dry bulb temperature in the air quantity detection air pipe by a thermometer of the air quantity detection air pipe, detecting the relative humidity at an air outlet of the air handling unit by a humidity sensor, detecting the atmospheric pressure by an atmospheric pressure meter, detecting the input power of the air handling unit by a power meter, calculating the air quantity of the air handling unit and the external static pressure in a standard air state by the external static pressure, the dynamic pressure, the dry bulb temperature, the relative humidity and the atmospheric pressure, and judging the state of the air handling unit running at the rated air quantity and the external static pressure, recording a reading of the power meter;
step B3: the air handling unit is powered off, the air quantity detection air pipe is taken down from the air handling unit, the static pressure detection air pipe is installed on the air handling unit, the air handling unit is powered on, the air handling unit is started, an electronic micro-pressure meter of the static pressure detection air pipe detects that the external static pressure is equal to the external static pressure detected by the electronic micro-pressure meter of the air quantity detection air pipe through an adjusting valve of the static pressure detection air pipe, the reading of the power meter is observed at the same time, the reading of the power meter detected by the static pressure detection air pipe is equal to the reading of the power meter detected by the air quantity detection air pipe, and the state of the air handling unit running under rated air quantity and external static pressure is judged;
step B4: the vibration speeds in the vertical direction and the horizontal direction of the basic platform are detected through the first magnetoelectric speed sensor to obtain a measuring point P1, the vibration speeds in the vertical direction and the horizontal direction on the ground are detected through the second magnetoelectric speed sensor to obtain a measuring point P2, the vibration speeds in the vertical direction and the horizontal direction on the ground are detected through the third magnetoelectric speed sensor to obtain a measuring point P3, meanwhile, data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, and the dynamic signal acquisition system continuously records corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3.
The method for detecting the vibration characteristic of the air handling unit comprises the step of detecting the vibration characteristic of the air handling unit, wherein the distance is 2 meters.
The method for detecting the vibration characteristic of the air handling unit comprises the steps that the static pressure ring of the air quantity detection air pipe, the rectifier grid of the air quantity detection air pipe and the thermometer of the air quantity detection air pipe are sequentially arranged from one end of the air quantity detection air pipe to the other end of the air quantity detection air pipe, the electronic micro-pressure meter of the air quantity detection air pipe is located on the peripheral wall of the static pressure ring of the air quantity detection air pipe, and the static pressure ring of the air quantity detection air pipe is located at the static pressure hole of the air quantity detection air pipe.
In the method for detecting the vibration characteristic of the air handling unit, the regulating valve of the static pressure detection air pipe is located at the other end of the static pressure detection air pipe, the static pressure ring of the static pressure detection air pipe is located between the regulating valve of the static pressure detection air pipe and the air handling unit, the electronic micro-pressure gauge of the static pressure detection air pipe is located on the peripheral wall of the static pressure ring of the static pressure detection air pipe, and the static pressure ring of the static pressure detection air pipe is located at the static pressure hole of the static pressure detection air pipe.
In the method for detecting the vibration characteristic of the air handling unit, the dynamic pressure hole of the air volume detecting air duct and the pitot tube of the air volume detecting air duct are both located between the rectifying grating of the air volume detecting air duct and the thermometer of the air volume detecting air duct.
In the method for detecting the vibration characteristic of the air handling unit, the throttling device cone is mounted at the air outlet of the air quantity detection air pipe, and the humidity sensor and the atmospheric pressure gauge are mounted outside the throttling device cone.
The method for detecting the vibration characteristic of the air handling unit is a daytime detection method, and the step a4 of the detection method includes:
step A4.1: detecting the vibration speeds in the vertical direction and the horizontal direction of the basic platform through the first magnetoelectric speed sensor under the state that the air handling unit is started to obtain a measuring point P1, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the second magnetoelectric speed sensor to obtain a measuring point P2, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the third magnetoelectric speed sensor to obtain a measuring point P3, the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor are respectively and continuously monitored for 2 hours, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, the dynamic signal acquisition system records data for 2 hours continuously, and records corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3;
step A4.2: detecting the vibration speeds in the vertical direction and the horizontal direction of the basic platform through the first magnetoelectric speed sensor under the state that the air handling unit is closed to obtain a measuring point P1, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the second magnetoelectric speed sensor to obtain a measuring point P2, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the third magnetoelectric speed sensor to obtain a measuring point P3, the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor are respectively and continuously monitored for 2 hours, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, the dynamic signal acquisition system records for 2 hours continuously, the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3 are recorded.
The method for detecting the vibration characteristic of the air handling unit is a nighttime detection method, and step B4 of the detection method includes:
step B4.1: detecting the vibration speeds in the vertical direction and the horizontal direction of the basic platform through the first magnetoelectric speed sensor under the state that the air handling unit is started to obtain a measuring point P1, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the second magnetoelectric speed sensor to obtain a measuring point P2, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the third magnetoelectric speed sensor to obtain a measuring point P3, the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor are respectively and continuously monitored for 2 hours, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, the dynamic signal acquisition system records data for 2 hours continuously, and records corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3;
step B4.2: detecting the vibration speeds in the vertical direction and the horizontal direction of the basic platform through the first magnetoelectric speed sensor under the state that the air handling unit is closed to obtain a measuring point P1, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the second magnetoelectric speed sensor to obtain a measuring point P2, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the third magnetoelectric speed sensor to obtain a measuring point P3, the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor are respectively and continuously monitored for 2 hours, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, the dynamic signal acquisition system records for 2 hours continuously, the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3 are recorded.
After the dynamic signal acquisition system records the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3, the spectrum analysis module of the dynamic signal acquisition system calculates and analyzes the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3 which are continuously recorded, obtains the power spectral density and the amplitude effective value spectrum of the corresponding vibration frequency of 0-100 Hz, and finally calculates the amplitude effective peak value.
Compared with the prior art, the technical scheme has the positive effects that:
the invention can accurately detect and judge the influence of the vibration of the air handling unit on the surrounding ground by the detection platform before the air handling unit is installed in place.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a method for detecting vibration characteristics of an air handling unit according to the present invention;
FIG. 2 is a schematic structural diagram of an air quantity detection duct in the method for detecting vibration characteristics of an air handling unit according to the present invention;
FIG. 3 is a schematic view of a daytime detection method of the method for detecting vibration characteristics of an air handling unit according to the present invention;
FIG. 4 is a schematic diagram of a night detection method of the method for detecting vibration characteristics of an air handling unit according to the present invention;
in the drawings: 1. a first magnetoelectric speed sensor; 2. a second magnetoelectric speed sensor; 3. a third magnetoelectric speed sensor; 4. an air quantity detection air pipe; 5. a static pressure detection air pipe; 6. an air handling unit; 41. a static pressure ring of the air quantity detection air pipe; 42. a flow-regulating grid of the air quantity detection air pipe; 43. a thermometer of the air quantity detection air pipe; 44. a pitot tube of the air quantity detection air pipe; 45. dynamic pressure holes of the air quantity detection air pipes; 46. an air outlet of the air quantity detection air pipe; 47. a throttle device cone; 51. static pressure ring of static pressure detecting wind pipe; 52. a regulating valve of the static pressure detection air pipe; 71. a first cushion pad; 72. a second cushion pad; 73. a base platform; 74. and (4) the ground.
Detailed Description
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Fig. 1 is a schematic overall structure diagram of a method for detecting vibration characteristics of an air handling unit according to the present invention, fig. 2 is a schematic structural diagram of an air volume detection duct in the method for detecting vibration characteristics of an air handling unit according to the present invention, fig. 3 is a schematic diagram of a daytime detection method in the method for detecting vibration characteristics of an air handling unit according to the present invention, fig. 4 is a schematic diagram of a nighttime detection method in the method for detecting vibration characteristics of an air handling unit according to the present invention, and fig. 1 to 4 show a method for detecting vibration characteristics of an air handling unit according to a preferred embodiment, including: the device is suitable for a detection platform and a detection device.
Further, as a preferred embodiment, the detection platform includes: the air treatment unit comprises a base platform 73, a first shock absorption pad 71 and a second shock absorption pad 72, wherein the base platform 73 is arranged on the ground 74, the air treatment unit 6 is arranged on the base platform 73, the first shock absorption pad 71 is arranged between the base platform 73 and the ground 74, and the second shock absorption pad 72 is arranged between the air treatment unit 6 and the base platform 73.
Further, as a preferred embodiment, the detecting device includes: an air quantity detecting air pipe 4, a static pressure detecting air pipe 5, a first magnetoelectric speed sensor 1, a second magnetoelectric speed sensor 2, a third magnetoelectric speed sensor 3 and a dynamic signal collecting system (not shown in the figure), wherein one end of the air quantity detecting air pipe 4 is connected with an air handling unit 6, one end of the static pressure detecting air pipe 5 is connected with the air handling unit 6, the first magnetoelectric speed sensor 1 is arranged on a basic platform 73, the first magnetoelectric speed sensor 1 is positioned at the end part of one end of the air handling unit 6, the second magnetoelectric speed sensor 2 is arranged on the ground 74, the second magnetoelectric speed sensor 2 is positioned at the end part of one end of the basic platform 73, the third magnetoelectric speed sensor 3 is arranged on the ground 74, the third magnetoelectric speed sensor 3 is positioned at one end of the second magnetoelectric speed sensor 2 away from the first magnetoelectric speed sensor 1, a space is formed between the third magnetoelectric speed sensor 3 and the second magnetoelectric speed sensor 2, and the dynamic signal acquisition system is in signal connection with the first magnetoelectric speed sensor 1, the second magnetoelectric speed sensor 2 and the third magnetoelectric speed sensor 3 respectively.
Further, as a preferred embodiment, the detection method is a daytime detection method, and the detection method includes:
step A1: an air quantity detection air pipe 4 is arranged on the air handling unit 6, the air handling unit 6 is electrified, and the air handling unit 6 is started;
step A2: the method comprises the steps of adjusting a cone 47 of a throttling device, detecting the external static pressure at a static pressure ring 41 of an air quantity detection air pipe by an electronic micro-manometer of the air quantity detection air pipe, detecting the dynamic pressure at a dynamic pressure hole 45 of the air quantity detection air pipe by the electronic micro-manometer of the air quantity detection air pipe and a pitot tube 44 of the air quantity detection air pipe, detecting the dry bulb temperature in the air quantity detection air pipe 4 by a thermometer 43 of the air quantity detection air pipe, detecting the relative humidity at an air outlet of an air handling unit 6 by a humidity sensor, detecting the atmospheric pressure by an atmospheric pressure gauge, detecting the input power of the air handling unit 6 by a power meter, calculating the air quantity and the external static pressure of the air handling unit 6 in a standard air state by the external static pressure, the dynamic pressure, the dry bulb temperature, the relative humidity and the atmospheric pressure, and judging the state of the air handling unit 6 running under rated air quantity and the external static pressure, recording the reading of the power meter;
step A3: powering off the air handling unit 6, taking down the air quantity detection air pipe 4 from the air handling unit 6, installing a static pressure detection air pipe 5 on the air handling unit 6, powering on the air handling unit 6, starting the air handling unit 6, enabling an electronic micro-manometer of the static pressure detection air pipe to detect that the external static pressure is equal to the external static pressure detected by the electronic micro-manometer of the air quantity detection air pipe through an adjusting valve 52 of the static pressure detection air pipe, simultaneously observing the reading of a power meter, enabling the reading of the power meter detected by the static pressure detection air pipe 5 to be equal to the reading of the power meter detected by the air quantity detection air pipe 4, and judging the state of the air handling unit 6 running under rated air quantity and external static pressure;
step A4: the vibration velocity in the vertical direction and the horizontal direction of the basic platform 73 is detected by the first magnetoelectric velocity sensor 1 to obtain a measuring point P1, the vibration velocity in the vertical direction and the horizontal direction on the ground 74 is detected by the second magnetoelectric velocity sensor 2 to obtain a measuring point P2, the vibration velocity in the vertical direction and the horizontal direction on the ground 74 is detected by the third magnetoelectric velocity sensor 3 to obtain a measuring point P3, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, and the dynamic signal acquisition system continuously records the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3.
The method for detecting the vibration characteristic of the air handling unit in the preferred embodiment is suitable for a detection platform and a detection device.
Further, as a preferred embodiment, the detection platform includes: the air treatment unit comprises a base platform 73, a first shock absorption pad 71 and a second shock absorption pad 72, wherein the base platform 73 is arranged on the ground 74, the air treatment unit 6 is arranged on the base platform 73, the first shock absorption pad 71 is arranged between the base platform 73 and the ground 74, and the second shock absorption pad 72 is arranged between the air treatment unit 6 and the base platform 73.
Further, as a preferred embodiment, the detecting device includes: an air quantity detecting air pipe 4, a static pressure detecting air pipe 5, a first magnetoelectric speed sensor 1, a second magnetoelectric speed sensor 2, a third magnetoelectric speed sensor 3 and a dynamic signal acquisition system, wherein one end of the air quantity detecting air pipe 4 is connected with an air handling unit 6, one end of the static pressure detecting air pipe 5 is connected with the air handling unit 6, the first magnetoelectric speed sensor 1 is arranged on a basic platform 73, the first magnetoelectric speed sensor 1 is positioned at the end part of one end of the air handling unit 6, the second magnetoelectric speed sensor 2 is arranged on the ground 74, the second magnetoelectric speed sensor 2 is positioned at the end part of one end of the basic platform 73, the third magnetoelectric speed sensor 3 is arranged on the ground, the third magnetoelectric speed sensor 3 is positioned at one end of the second magnetoelectric speed sensor 2 far away from the first magnetoelectric speed sensor 1, a gap is formed between the third magnetoelectric speed sensor 3 and the second magnetoelectric speed sensor 2, the dynamic signal acquisition system is respectively in signal connection with the first magnetoelectric speed sensor 1, the second magnetoelectric speed sensor 2 and the third magnetoelectric speed sensor 3.
Further, as a preferred embodiment, the detection method is a night detection method, and the detection method includes:
step B1: an air quantity detection air pipe 4 is arranged on the air handling unit 6, the air handling unit 6 is electrified, and the air handling unit 6 is started;
step B2: by adjusting the cone 47 of the throttling device and detecting the external static pressure at the static pressure ring 41 of the air quantity detection air pipe through the electronic micro-manometer of the air quantity detection air pipe, the dynamic pressure at the dynamic pressure hole 45 of the air quantity detection air pipe is detected by an electronic micro-manometer of the air quantity detection air pipe and a pitot tube 44 of the air quantity detection air pipe, the dry bulb temperature in the air quantity detection air pipe is detected by a thermometer 43 of the air quantity detection air pipe, the relative humidity at the air outlet of the air handling unit 6 is detected by a humidity sensor, the atmospheric pressure is detected by an atmospheric pressure meter, the input power of the air processing unit 6 is detected by a power meter, calculating the air volume of the air handling unit 6 and the external static pressure in a standard air state through the external static pressure, the dynamic pressure, the dry bulb temperature, the relative humidity and the atmospheric pressure, judging the state of the air handling unit 6 running in a rated air volume and the external static pressure, and recording the reading of a power meter;
step B3: powering off the air handling unit 6, taking down the air quantity detection air pipe 4 from the air handling unit 6, installing a static pressure detection air pipe 5 on the air handling unit 6, powering on the air handling unit 6, starting the air handling unit 6, enabling an electronic micro-manometer of the static pressure detection air pipe to detect that the external static pressure is equal to the external static pressure detected by the electronic micro-manometer of the air quantity detection air pipe through an adjusting valve 52 of the static pressure detection air pipe, simultaneously observing the reading of a power meter, enabling the reading of the power meter detected by the static pressure detection air pipe 5 to be equal to the reading of the power meter detected by the air quantity detection air pipe 4, and judging the state of the air handling unit 6 running under rated air quantity and external static pressure;
step B4: the vibration velocity in the vertical direction and the horizontal direction of the basic platform 73 is detected by the first magnetoelectric velocity sensor 1 to obtain a measuring point P1, the vibration velocity in the vertical direction and the horizontal direction on the ground 74 is detected by the second magnetoelectric velocity sensor 2 to obtain a measuring point P2, the vibration velocity in the vertical direction and the horizontal direction on the ground 74 is detected by the third magnetoelectric velocity sensor 3 to obtain a measuring point P3, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, and the dynamic signal acquisition system continuously records the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3.
Further, as a preferred embodiment, after the above steps are completed, after the dynamic signal acquisition system records corresponding values of data of the measuring point P1, the measuring point P2 and the measuring point P3, the spectrum analysis module of the dynamic signal acquisition system calculates and analyzes the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3 which are continuously recorded, obtains a power spectral density and an amplitude effective value spectrum of the corresponding vibration frequency of 0 to 100Hz, and finally calculates an amplitude effective peak value.
Preferably, the comparison of the effective peak amplitude values of the measuring points P1, P2 and P3 recorded in the vertical direction and the horizontal direction of the first magnetoelectric speed sensor 1, the second magnetoelectric speed sensor 2 and the third magnetoelectric speed sensor 3 under the working conditions of closing and opening of the air handling unit 6 is analyzed in the daytime period and the nighttime period, respectively.
Further, as a preferred embodiment, the detecting method is a daytime detecting method, and step a4 of the detecting method includes:
step A4.1: in the state that the air handling unit 6 is started, the first magnetoelectric speed sensor 1 detects the vibration speed of the base platform 73 in the vertical direction and the horizontal direction to obtain a measuring point P1, the second magnetoelectric speed sensor 2 detects the vibration speed of the ground 74 in the vertical direction and the horizontal direction to obtain a measuring point P2, the third magnetoelectric speed sensor 3 detects the vibration speed of the ground 74 in the vertical direction and the horizontal direction to obtain a measuring point P3, the first magnetoelectric speed sensor 1, the second magnetoelectric speed sensor 2 and the third magnetoelectric speed sensor 3 are respectively and continuously monitored for 2 hours, and simultaneously data of the measuring points P1, P2 and P3 are transmitted to a dynamic signal acquisition system, and the dynamic signal acquisition system continuously records for 2 hours and records corresponding values of the data of the measuring points P1, P2 and P3;
step A4.2: when the air handling unit 6 is in a closed state, the first magnetoelectric speed sensor 1 detects the vibration speed of the base platform 73 in the vertical direction and the horizontal direction to obtain a measuring point P1, the second magnetoelectric speed sensor 2 detects the vibration speed of the ground 74 in the vertical direction and the horizontal direction to obtain a measuring point P2, the third magnetoelectric speed sensor 3 detects the vibration speed of the ground 74 in the vertical direction and the horizontal direction to obtain a measuring point P3, the first magnetoelectric speed sensor 1, the second magnetoelectric speed sensor 2 and the third magnetoelectric speed sensor 3 are respectively and continuously monitored for 2 hours, and simultaneously data of the measuring points P1, P2 and P3 are transmitted to the dynamic signal acquisition system, and the dynamic signal acquisition system continuously records for 2 hours and records corresponding values of the data of the measuring points P1, P2 and P3.
Further, as a preferred embodiment, the detecting method is a night detecting method, and step B4 of the detecting method includes:
step B4.1: in the state that the air handling unit 6 is started, the first magnetoelectric speed sensor 1 detects the vibration speed of the base platform 73 in the vertical direction and the horizontal direction to obtain a measuring point P1, the second magnetoelectric speed sensor 2 detects the vibration speed of the ground 74 in the vertical direction and the horizontal direction to obtain a measuring point P2, the third magnetoelectric speed sensor 3 detects the vibration speed of the ground 74 in the vertical direction and the horizontal direction to obtain a measuring point P3, the first magnetoelectric speed sensor 1, the second magnetoelectric speed sensor 2 and the third magnetoelectric speed sensor 3 are respectively and continuously monitored for 2 hours, and simultaneously data of the measuring points P1, P2 and P3 are transmitted to a dynamic signal acquisition system, and the dynamic signal acquisition system continuously records for 2 hours and records corresponding values of the data of the measuring points P1, P2 and P3;
step B4.2: when the air handling unit 6 is in a closed state, the first magnetoelectric speed sensor 1 detects the vibration speed of the base platform 73 in the vertical direction and the horizontal direction to obtain a measuring point P1, the second magnetoelectric speed sensor 2 detects the vibration speed of the ground 74 in the vertical direction and the horizontal direction to obtain a measuring point P2, the third magnetoelectric speed sensor 3 detects the vibration speed of the ground 74 in the vertical direction and the horizontal direction to obtain a measuring point P3, the first magnetoelectric speed sensor 1, the second magnetoelectric speed sensor 2 and the third magnetoelectric speed sensor 3 are respectively and continuously monitored for 2 hours, and simultaneously data of the measuring points P1, P2 and P3 are transmitted to the dynamic signal acquisition system, and the dynamic signal acquisition system continuously records for 2 hours and records corresponding values of the data of the measuring points P1, P2 and P3.
The above are merely preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.
The present invention also has the following embodiments in addition to the above:
in a further embodiment of the present invention, please continue to refer to fig. 1 to 4, the distance is 2 meters.
In a further embodiment of the present invention, the static pressure ring 41 of the air quantity detecting duct, the flow straightener 42 of the air quantity detecting duct, and the thermometer 43 of the air quantity detecting duct are sequentially disposed along one end of the air quantity detecting duct 4 to the other end of the air quantity detecting duct 4, and the electronic micro-pressure gauge of the air quantity detecting duct is located on the peripheral wall of the static pressure ring 41 of the air quantity detecting duct.
In a further embodiment of the present invention, the static pressure ring 41 of the air quantity detecting air pipe is arranged at the static pressure hole of the air quantity detecting air pipe.
In a further embodiment of the present invention, the regulating valve 52 of the static pressure detecting air duct is located at the other end of the static pressure detecting air duct 5, the static pressure ring 51 of the static pressure detecting air duct is located between the regulating valve 52 of the static pressure detecting air duct and the air handling unit 6, and the electronic micro-pressure gauge of the static pressure detecting air duct is located on the peripheral wall of the static pressure ring 51 of the static pressure detecting air duct.
In a further embodiment of the invention, a static pressure ring 51 of the static pressure test air duct is arranged at the static pressure hole of the static pressure test air duct.
In a further embodiment of the present invention, the dynamic pressure hole 45 of the air quantity detecting air duct and the pitot tube 44 of the air quantity detecting air duct are both located between the flow straightener 42 of the air quantity detecting air duct and the thermometer 43 of the air quantity detecting air duct.
In a further embodiment of the present invention, a cone 47 of the throttling device is installed at the air outlet 46 of the air volume detecting duct, and the humidity sensor and the barometric pressure meter are installed outside the cone 47 of the throttling device.
The invention can accurately detect and judge the influence of the vibration of the air handling unit 6 on the surrounding ground by the detection platform before the air handling unit 6 is installed in place.
The effective peak values of the amplitudes of the measuring points of the air handling unit under two working conditions of closing and opening are compared: (vibration frequency 1 to 100Hz)
TABLE 1 effective value peak list of each measuring point under the working conditions of closing and opening of unit in day time period and night time period
(numerical rounding to preserve three decimal places)
According to the invention, the effective detection platform and the detection device can detect the transmission influence of the vibration of the air handling unit on the surrounding ground (within 2 meters) after the vibration reduction device is used, whether the effective peak amplitude value can be reduced to below 150 nanometers (within the range of vibration frequency 1-100 Hz) or not can be detected, and the vibration reduction effect can be effectively detected and verified.
While the invention has been described with reference to a preferred embodiment, 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 spirit and scope of the invention.
Claims (10)
1. A detection method for vibration characteristics of an air handling unit is characterized by being suitable for a detection platform and a detection device;
the detection platform comprises:
the air treatment unit comprises a base platform, an air treatment unit and a control unit, wherein the base platform is arranged on the ground, and the air treatment unit is arranged on the base platform;
the first shock pad is arranged between the foundation platform and the ground;
the second shock pad is arranged between the air handling unit and the base platform;
the detection device includes:
one end of the air quantity detection air pipe is connected with the air handling unit;
one end of the static pressure detection air pipe is connected with the air handling unit;
the first magnetoelectric speed sensor is arranged on the base platform and is positioned at the end part of one end of the air handling unit;
the second magnetoelectric speed sensor is arranged on the ground and is positioned at the end part of one end of the basic platform;
the third magnetoelectric speed sensor is arranged on the ground and is positioned at one end of the second magnetoelectric speed sensor, which is far away from the first magnetoelectric speed sensor, and a distance is formed between the third magnetoelectric speed sensor and the second magnetoelectric speed sensor;
the dynamic signal acquisition system is in signal connection with the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor respectively;
the detection method is a daytime detection method, and comprises the following steps:
step A1: installing the air volume detection air pipe on the air handling unit, electrifying the air handling unit, and starting the air handling unit;
step A2: adjusting a cone of a throttling device, detecting the external static pressure at a static pressure ring of an air quantity detection air pipe by an electronic micro-manometer of the air quantity detection air pipe, detecting the dynamic pressure at a dynamic pressure hole of the air quantity detection air pipe by the electronic micro-manometer of the air quantity detection air pipe and a pitot tube of the air quantity detection air pipe, detecting the dry bulb temperature in the air quantity detection air pipe by a thermometer of the air quantity detection air pipe, detecting the relative humidity at an air outlet of the air handling unit by a humidity sensor, detecting the atmospheric pressure by an atmospheric pressure meter, detecting the input power of the air handling unit by a power meter, calculating the air quantity of the air handling unit and the external static pressure in a standard air state by the external static pressure, the dynamic pressure, the dry bulb temperature, the relative humidity and the atmospheric pressure, and judging the state of the air handling unit running at the rated air quantity and the external static pressure, recording a reading of the power meter;
step A3: the air handling unit is powered off, the air quantity detection air pipe is taken down from the air handling unit, the static pressure detection air pipe is installed on the air handling unit, the air handling unit is powered on, the air handling unit is started, an electronic micro-pressure meter of the static pressure detection air pipe detects that the external static pressure is equal to the external static pressure detected by the electronic micro-pressure meter of the air quantity detection air pipe through an adjusting valve of the static pressure detection air pipe, the reading of the power meter is observed at the same time, the reading of the power meter detected by the static pressure detection air pipe is equal to the reading of the power meter detected by the air quantity detection air pipe, and the state of the air handling unit running under rated air quantity and external static pressure is judged;
step A4: the vibration speeds in the vertical direction and the horizontal direction of the basic platform are detected through the first magnetoelectric speed sensor to obtain a measuring point P1, the vibration speeds in the vertical direction and the horizontal direction on the ground are detected through the second magnetoelectric speed sensor to obtain a measuring point P2, the vibration speeds in the vertical direction and the horizontal direction on the ground are detected through the third magnetoelectric speed sensor to obtain a measuring point P3, meanwhile, data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, and the dynamic signal acquisition system continuously records corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3.
2. A detection method for vibration characteristics of an air handling unit is characterized by being suitable for a detection platform and a detection device;
the detection platform comprises:
the air treatment unit comprises a base platform, an air treatment unit and a control unit, wherein the base platform is arranged on the ground, and the air treatment unit is arranged on the base platform;
the first shock pad is arranged between the foundation platform and the ground;
the second shock pad is arranged between the air handling unit and the base platform;
the detection device includes:
one end of the air quantity detection air pipe is connected with the air handling unit;
one end of the static pressure detection air pipe is connected with the air handling unit;
the first magnetoelectric speed sensor is arranged on the base platform and is positioned at the end part of one end of the air handling unit;
the second magnetoelectric speed sensor is arranged on the ground and is positioned at the end part of one end of the basic platform;
the third magnetoelectric speed sensor is arranged on the ground and is positioned at one end of the second magnetoelectric speed sensor, which is far away from the first magnetoelectric speed sensor, and a distance is formed between the third magnetoelectric speed sensor and the second magnetoelectric speed sensor;
the dynamic signal acquisition system is in signal connection with the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor respectively;
the detection method is a night detection method, and comprises the following steps:
step B1: installing the air volume detection air pipe on the air handling unit, electrifying the air handling unit, and starting the air handling unit;
step B2: adjusting a cone of a throttling device, detecting the external static pressure at a static pressure ring of an air quantity detection air pipe by an electronic micro-manometer of the air quantity detection air pipe, detecting the dynamic pressure at a dynamic pressure hole of the air quantity detection air pipe by the electronic micro-manometer of the air quantity detection air pipe and a pitot tube of the air quantity detection air pipe, detecting the dry bulb temperature in the air quantity detection air pipe by a thermometer of the air quantity detection air pipe, detecting the relative humidity at an air outlet of the air handling unit by a humidity sensor, detecting the atmospheric pressure by an atmospheric pressure meter, detecting the input power of the air handling unit by a power meter, calculating the air quantity of the air handling unit and the external static pressure in a standard air state by the external static pressure, the dynamic pressure, the dry bulb temperature, the relative humidity and the atmospheric pressure, and judging the state of the air handling unit running at the rated air quantity and the external static pressure, recording a reading of the power meter;
step B3: the air handling unit is powered off, the air quantity detection air pipe is taken down from the air handling unit, the static pressure detection air pipe is installed on the air handling unit, the air handling unit is powered on, the air handling unit is started, an electronic micro-pressure meter of the static pressure detection air pipe detects that the external static pressure is equal to the external static pressure detected by the electronic micro-pressure meter of the air quantity detection air pipe through an adjusting valve of the static pressure detection air pipe, the reading of the power meter is observed at the same time, the reading of the power meter detected by the static pressure detection air pipe is equal to the reading of the power meter detected by the air quantity detection air pipe, and the state of the air handling unit running under rated air quantity and external static pressure is judged;
step B4: the vibration speeds in the vertical direction and the horizontal direction of the basic platform are detected through the first magnetoelectric speed sensor to obtain a measuring point P1, the vibration speeds in the vertical direction and the horizontal direction on the ground are detected through the second magnetoelectric speed sensor to obtain a measuring point P2, the vibration speeds in the vertical direction and the horizontal direction on the ground are detected through the third magnetoelectric speed sensor to obtain a measuring point P3, meanwhile, data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, and the dynamic signal acquisition system continuously records corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3.
3. A method of detecting vibration characteristics of an air handling unit according to claim 1 or claim 2 wherein the spacing is 2 metres.
4. The method according to claim 1 or 2, wherein the static pressure ring of the air volume detecting duct, the flow straightener of the air volume detecting duct, and the thermometer of the air volume detecting duct are sequentially disposed along a direction from one end of the air volume detecting duct to the other end of the air volume detecting duct, the electronic micro-pressure gauge of the air volume detecting duct is disposed on a circumferential wall of the static pressure ring of the air volume detecting duct, and the static pressure ring of the air volume detecting duct is disposed at the static pressure hole of the air volume detecting duct.
5. The method for detecting the vibration characteristics of the air handling unit according to claim 1 or 2, wherein the regulating valve of the static pressure detection air duct is located at the other end of the static pressure detection air duct, the static pressure ring of the static pressure detection air duct is located between the regulating valve of the static pressure detection air duct and the air handling unit, the electronic micro-pressure gauge of the static pressure detection air duct is located on the peripheral wall of the static pressure ring of the static pressure detection air duct, and the static pressure ring of the static pressure detection air duct is located at the static pressure hole of the static pressure detection air duct.
6. The method according to claim 4, wherein the dynamic pressure port of the air volume detecting duct and the pitot tube of the air volume detecting duct are both located between the flow straightener of the air volume detecting duct and the thermometer of the air volume detecting duct.
7. The method for detecting the vibration characteristics of the air handling unit according to claim 1 or 2, wherein the throttle device cone is installed at an air outlet of the air volume detection duct, and the humidity sensor and the atmospheric pressure gauge are installed outside the throttle device cone.
8. The method for detecting vibration characteristics of an air handling unit according to claim 1, wherein said detection method is a daytime detection method, and said step a4 of said detection method comprises:
step A4.1: detecting the vibration speeds in the vertical direction and the horizontal direction of the basic platform through the first magnetoelectric speed sensor under the state that the air handling unit is started to obtain a measuring point P1, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the second magnetoelectric speed sensor to obtain a measuring point P2, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the third magnetoelectric speed sensor to obtain a measuring point P3, the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor are respectively and continuously monitored for 2 hours, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, the dynamic signal acquisition system records data for 2 hours continuously, and records corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3;
step A4.2: detecting the vibration speeds in the vertical direction and the horizontal direction of the basic platform through the first magnetoelectric speed sensor under the state that the air handling unit is closed to obtain a measuring point P1, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the second magnetoelectric speed sensor to obtain a measuring point P2, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the third magnetoelectric speed sensor to obtain a measuring point P3, the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor are respectively and continuously monitored for 2 hours, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, the dynamic signal acquisition system records for 2 hours continuously, the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3 are recorded.
9. The method for detecting vibration characteristics of an air handling unit according to claim 2, wherein the detection method is a night detection method, and step B4 of the detection method comprises:
step B4.1: detecting the vibration speeds in the vertical direction and the horizontal direction of the basic platform through the first magnetoelectric speed sensor under the state that the air handling unit is started to obtain a measuring point P1, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the second magnetoelectric speed sensor to obtain a measuring point P2, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the third magnetoelectric speed sensor to obtain a measuring point P3, the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor are respectively and continuously monitored for 2 hours, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, the dynamic signal acquisition system records data for 2 hours continuously, and records corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3;
step B4.2: detecting the vibration speeds in the vertical direction and the horizontal direction of the basic platform through the first magnetoelectric speed sensor under the state that the air handling unit is closed to obtain a measuring point P1, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the second magnetoelectric speed sensor to obtain a measuring point P2, detecting the vibration speeds in the vertical direction and the horizontal direction on the ground through the third magnetoelectric speed sensor to obtain a measuring point P3, the first magnetoelectric speed sensor, the second magnetoelectric speed sensor and the third magnetoelectric speed sensor are respectively and continuously monitored for 2 hours, meanwhile, the data of the measuring point P1, the measuring point P2 and the measuring point P3 are transmitted to the dynamic signal acquisition system, the dynamic signal acquisition system records for 2 hours continuously, the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3 are recorded.
10. The method for detecting the vibration characteristics of the air handling unit according to claim 1 or 2, wherein after the dynamic signal acquisition system records the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3, the spectrum analysis module of the dynamic signal acquisition system calculates and analyzes the corresponding values of the data of the measuring point P1, the measuring point P2 and the measuring point P3 which are continuously recorded, obtains the power spectral density and the effective amplitude value spectrum of the corresponding vibration frequency of 0 to 100Hz, and finally calculates the effective amplitude peak.
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| KR102660931B1 (en) * | 2017-01-24 | 2024-04-25 | 삼성전자주식회사 | Device for measuring air condition and method therof |
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| CN200993614Y (en) * | 2006-11-24 | 2007-12-19 | 广州电器科学研究院 | Air conditioner noise-aircurrent measurement laboratory |
| CN204665505U (en) * | 2015-04-23 | 2015-09-23 | 江苏新科中央空调有限公司 | Be provided with the compressor of air conditioner of dampening assembly |
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