CN211901045U - Testing device for measuring pneumatic performance and pneumatic noise of gas ventilator - Google Patents
Testing device for measuring pneumatic performance and pneumatic noise of gas ventilator Download PDFInfo
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- CN211901045U CN211901045U CN201922482515.0U CN201922482515U CN211901045U CN 211901045 U CN211901045 U CN 211901045U CN 201922482515 U CN201922482515 U CN 201922482515U CN 211901045 U CN211901045 U CN 211901045U
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/12—Testing on a test bench
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- General Engineering & Computer Science (AREA)
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Abstract
The utility model is suitable for a fan test field provides a measure testing arrangement of pneumatic performance and pneumatic noise of gas ventilation blower, testing arrangement sets up including the tuber pipe that is used for the ventilation tuber pipe one end is used for installing the fan installation mechanism of being surveyed the fan, and sets up the air inlet control mechanism that the tuber pipe other end is used for controlling the intake sets up controller, air velocity transducer, static pressure differential pressure sensor on the tuber pipe etc. solve fan pneumatic performance and the problem that pneumatic noise can not simultaneous measurement on the car among the prior art.
Description
Technical Field
The utility model belongs to fan test field especially relates to a measure testing arrangement of pneumatic performance of gas ventilation machine and pneumatic noise.
Background
The performance testing device of the ventilator on the market at present can only be used for testing and evaluating the pneumatic performance of the ventilator, is generally designed to be complex, is a large-scale general pneumatic performance testing device of the ventilator, does not consider the problem of vibration noise of the testing device, has large additional noise influence generated by the testing device, has certain influence on noise and flow by an auxiliary power system, can not measure the noise of the ventilator, and can only measure the vibration noise of the ventilator by the performance testing device of the vibration noise of the ventilator, and can not give consideration to the pneumatic performance of the ventilator.
Disclosure of Invention
An object of the utility model is to provide a measure testing arrangement of pneumatic performance and pneumatic noise of gas ventilation fan, it has very strong associativity with pneumatic noise to aim at pneumatic performance on the car among the solution prior art, it will be considered comprehensively when developing the design, balanced design, technical requirement is that the noise is low, the amount of wind is big, the low power dissipation, high efficiency, the single comparison pneumatic noise size of fan of different pneumatic performance does not have realistic meaning, pneumatic performance testing arrangement can not evaluate the pneumatic noise of fan, can not embody the fan gas flow, the correlation of boundary condition changes such as resistance and pneumatic noise changes, can't carry out relevant data analysis and fan performance comprehensive evaluation test, be unfavorable for the performance optimization of automobile parts product, fan vibration noise test equipment can't obtain the actual operating condition parameter of fan, fan noise and fan flabellum fluid pressure of flowing through, The flow velocity distribution state, the working condition of the fan and the like are related, when the noise and the pneumatic performance are separately measured, the gas states of the noise and the pneumatic performance are inconsistent, the working condition of the fan is inconsistent, the noise and the pneumatic performance cannot be directly related, and the comparability is poor.
The utility model discloses a realize like this, a measuring gas ventilation blower aerodynamic performance and pneumatic noise's testing arrangement, testing arrangement sets up including the tuber pipe that is used for the ventilation tuber pipe one end is used for installing the fan installation mechanism by the fan of being surveyed, and sets up the tuber pipe other end is used for controlling the air inlet control mechanism of intake, fan installation mechanism is including setting up be used for installing the fan fixed plate by the fan on the tuber pipe, and fix through the stretch cord rubber foaming shock insulation pad that just has the vibration isolation effect on the fan fixed plate.
The utility model discloses a further technical scheme is: the air inlet control mechanism is connected including the air intake that is the bowl mouth of a river form the air intake with the connecting air pipe of tuber pipe sets up in the connecting air pipe and with the door plant that the connecting air pipe is connected through the pivot, and set up and be in the connecting air pipe both sides just are connected the door plant regulating unit of pivot.
The utility model discloses a further technical scheme is: the air door plate adjusting unit comprises a manual adjusting part and an automatic adjusting part, wherein the manual adjusting part is arranged on one side of the connecting air pipe and connected with the rotating shaft, and the automatic adjusting part is arranged on the other side of the connecting air pipe and connected with the rotating shaft.
The utility model discloses a further technical scheme is: the manual adjusting part comprises a handle and a positioning bolt, one end of the handle is connected with the rotating shaft and used for rotating the air door plate, and the positioning bolt is arranged on the connecting air pipe and used for fixing the other end of the handle.
The utility model discloses a further technical scheme is: the automatic adjusting part comprises a stepping motor which is fixed on the connecting air pipe by a fixing frame and is connected with the rotating shaft by a rotor, and a motor driver which is arranged on the side surface of the air inlet and is used for controlling the stepping motor.
The utility model discloses a further technical scheme is: the wind door plate comprises a first mesh plate, a second mesh plate and first sound absorption cotton, wherein the second mesh plate is connected with the first mesh plate and is of a cavity structure, the first sound absorption cotton is arranged in the cavity structure and plays a sound absorption role, and the rotating shaft is arranged on two opposite sides of the first mesh plate.
The utility model discloses a further technical scheme is: the tuber pipe is C type tuber pipe, the tuber pipe includes inlayer mesh steel sheet, overlaps the inlayer mesh steel sheet outer and with the inlayer mesh steel sheet is the outer sealed steel sheet of cavity structure, and sets up the sound cotton is inhaled to the second that plays the sound effect in the cavity structure.
The utility model discloses a further technical scheme is: the testing device also comprises a first support and a second support which are used for supporting the air pipe and are provided with rollers.
The utility model discloses a further technical scheme is: the testing device further comprises a rectifying grid arranged in the air pipe, an air speed sensor arranged in the air pipe and used for measuring the flow speed, and a static pressure differential pressure sensor arranged on the air pipe and used for measuring the differential pressure.
The utility model discloses a further technical scheme is: the testing device further comprises an acquisition system, wherein the acquisition system comprises data acquisition equipment, and a wind speed sensor, a static pressure differential pressure sensor, a rotating speed sensor, a voltage current sensor and a microphone which are connected with the data acquisition equipment, wherein the rotating speed sensor and the voltage current sensor are both connected with the tested fan, and the microphone is used for detecting the noise of the tested fan.
The utility model has the advantages that: the device has the advantages of capability of simultaneously measuring the aerodynamic performance and the aerodynamic noise of the automobile fan, convenience for analyzing the relationship among various performance parameters of the fan, finding an improved scheme according to test and analysis results, contribution to optimization of the fan, small volume, simple structure, light weight, mobility, high utilization rate, simplicity in manufacture and low cost, capability of obtaining the performance parameters of the tested fan, such as noise, static pressure, flow rate, voltage, current, power, rotating speed, static pressure efficiency and the like at one time, improvement of test efficiency and reduction of test cost.
Drawings
Fig. 1 is a structural diagram of a testing device for measuring aerodynamic performance and aerodynamic noise of a gas ventilator according to an embodiment of the present invention;
fig. 2 is an assembly view of a fan mounting mechanism of a testing device for measuring aerodynamic performance and aerodynamic noise of an air ventilator according to an embodiment of the present invention;
fig. 3 is an assembly view of an air inlet control mechanism of a testing device for measuring pneumatic performance and pneumatic noise of a gas ventilator according to an embodiment of the present invention;
fig. 4 is a structural diagram of a manual adjusting part of a testing device for measuring the pneumatic performance and the pneumatic noise of a gas ventilator, which is provided by the embodiment of the invention;
fig. 5 is a structural diagram of an automatic adjusting part of a testing device for measuring the pneumatic performance and the pneumatic noise of a gas ventilator, which is provided by the embodiment of the invention;
fig. 6 is a structural diagram of a wind gate plate of a testing device for measuring aerodynamic performance and aerodynamic noise of a gas ventilator according to an embodiment of the present invention;
fig. 7 is a first cross-sectional view of an air duct of a testing device for measuring aerodynamic performance and aerodynamic noise of an air ventilator according to an embodiment of the present invention;
fig. 8 is a second cross-sectional view of an air duct of a testing device for measuring aerodynamic performance and aerodynamic noise of an air ventilator provided by an embodiment of the present invention;
fig. 9 is a schematic view of a rectification grid of a testing device for measuring aerodynamic performance and aerodynamic noise of a gas ventilator according to an embodiment of the present invention;
fig. 10 is a first assembly view of a static pressure differential pressure sensor of a testing device for measuring aerodynamic performance and aerodynamic noise of an air ventilator according to an embodiment of the present invention;
fig. 11 is a second assembly view of a static pressure differential pressure sensor of the testing device for measuring the pneumatic performance and the pneumatic noise of the gas ventilator provided by the embodiment of the present invention;
fig. 12 is a third assembly view of a static pressure differential pressure sensor of the testing device for measuring the pneumatic performance and the pneumatic noise of the gas ventilator provided by the embodiment of the invention;
fig. 13 is a control diagram of a stepping motor of a testing device for measuring pneumatic performance and pneumatic noise of a gas ventilator according to an embodiment of the present invention;
fig. 14 is a schematic diagram of an automatic adjusting part of a testing device for measuring the pneumatic performance and the pneumatic noise of a gas ventilator according to an embodiment of the present invention;
fig. 15 is a schematic diagram of a manual adjustment portion of a testing device for measuring pneumatic performance and pneumatic noise of a gas ventilator according to an embodiment of the present invention;
fig. 16 is a graph showing the variation of static pressure of a certain fan with the rotating speed of the fan when the opening degree of the air door plate is different in the testing device for measuring the pneumatic performance and the pneumatic noise of the air ventilator provided by the embodiment of the present invention;
fig. 17 is a graph showing the variation of the wind speed of a certain fan along with the rotation speed of the fan when the opening degree of the air door plate is different in the testing device for measuring the pneumatic performance and the pneumatic noise of the gas fan according to the embodiment of the present invention;
fig. 18 is a graph showing the power of an input shaft of a certain fan varying with the rotating speed of the fan at different opening degrees of a fan plate of a testing device for measuring the pneumatic performance and the pneumatic noise of a gas fan according to an embodiment of the present invention;
fig. 19 is a graph showing that the sound pressure level per meter of a certain fan varies with the rotating speed of the fan when the opening degree of the air door plate is different in the testing device for measuring the pneumatic performance and the pneumatic noise of the gas fan according to the embodiment of the present invention;
fig. 20 is a graph showing the variation of fan flow, static pressure, power, and static pressure efficiency with the fan rotation speed and voltage when the fan plate of the testing device for measuring the pneumatic performance and the pneumatic noise of the air ventilator provided by the embodiment of the present invention is fully opened;
fig. 21 is a graph showing changes of a certain fan flow, static pressure, power, and static pressure efficiency with a fan rotation speed and a voltage when a fan plate of the testing device for measuring the pneumatic performance and the pneumatic noise of the gas ventilator provided by the embodiment of the present invention is opened by 45 degrees;
fig. 22 is a graph showing the variation of fan flow, static pressure, power, and static pressure efficiency with the fan rotation speed and voltage when the fan plate of the testing device for measuring the pneumatic performance and the pneumatic noise of the air ventilator provided by the embodiment of the present invention is opened by 30 degrees;
fig. 23 is a graph showing the variation of a certain fan flow, static pressure, power, and static pressure efficiency with the fan rotation speed and voltage when the fan plate of the testing device for measuring the pneumatic performance and the pneumatic noise of the air ventilator provided by the embodiment of the present invention is closed;
FIG. 24 is a graph comparing the volumetric flow rates at 100pa @1500r/min for different fans of a testing device for measuring the aerodynamic performance and the aerodynamic noise of an air ventilator provided by an embodiment of the present invention;
fig. 25 is a graph comparing the frequency spectrum of the sound pressure level of 1 meter at 100pa @1500r/min for different fans of the testing device for measuring the aerodynamic performance and the aerodynamic noise of the gas ventilator provided by the embodiment of the present invention.
Detailed Description
Reference numerals: 1-an air pipe 2-a fan mounting mechanism 3-an air inlet control mechanism 4-a first support 5-a second support 6-a fan fixing plate 7-a rubber foam shock insulation pad 8-a tested fan 9-an air inlet 10-a connecting air pipe 11-a rotating shaft 12-an air door plate 13-a handle 14-a positioning bolt 15-a fixing frame 16-a stepping motor 17-a motor driver 18-a first mesh plate 19-a second mesh plate 20-a first sound-absorbing cotton 21-an inner layer mesh steel plate 22-an outer layer sealing steel plate 23-a second sound-absorbing cotton 24-a rectifying grid 25-an air speed sensor 26-a static pressure differential pressure sensor.
Fig. 1-25 show a pair of measuring test device of pneumatic performance and pneumatic noise of gas ventilation machine, test device is including the tuber pipe 1 that is used for the ventilation, sets up 1 one end of tuber pipe is used for installing fan installation mechanism 2 by air measuring machine 8, and sets up the air inlet control mechanism 3 that the 1 other end of tuber pipe is used for controlling the intake, fan installation mechanism 2 is including setting up be used for installing fan fixed plate 6 by air measuring machine 8 on the tuber pipe 1, and fix through the stretch cord rubber foaming shock insulation pad 7 that just has the vibration isolation effect on fan fixed plate 6.
Air inlet control mechanism 3 is including being the air intake 9 of bowl mouth of a river form, connects air intake 9 with the connecting air duct 10 of tuber pipe 1 sets up in the connecting air duct 10 and with the door plant 12 that connecting air duct 10 connects through pivot 11, and set up connecting air duct 10 both sides and connection the door plant regulating unit of pivot 11.
The air door plate adjusting unit comprises a manual adjusting part and an automatic adjusting part, wherein the manual adjusting part is arranged on one side of the connecting air pipe 10 and connected with the rotating shaft 11, and the automatic adjusting part is arranged on the other side of the connecting air pipe 10 and connected with the rotating shaft 11.
The manual adjusting part comprises a handle 13 and a positioning bolt 14, wherein one end of the handle 13 is connected with the rotating shaft 11 and used for rotating the air door plate 12, and the positioning bolt 14 is arranged on the connecting air pipe 10 and used for fixing the other end of the handle 13.
The automatic adjusting part comprises a stepping motor 16 which is fixed on the connecting air pipe 10 by a fixing frame 15 and has a rotor connected with the rotating shaft 11, and a motor driver 17 which is arranged on the side surface of the air inlet 9 and is used for controlling the stepping motor 16.
The wind door plate 12 comprises a first mesh plate 18, a second mesh plate 19 which is connected with the first mesh plate 18 and has a cavity structure with the first mesh plate 18, and first sound absorption cotton 20 which is arranged in the cavity structure and has a sound absorption effect, wherein the rotating shaft 11 is arranged on two opposite sides of the first mesh plate 18.
The testing device also comprises a first bracket 4 and a second bracket 5 which are used for supporting the air pipe 1 and are provided with rollers.
The testing device further comprises a rectifying grating 24 arranged in the air pipe 1, an air speed sensor 25 arranged in the air pipe 1 and used for measuring flow speed, and a static pressure and differential pressure sensor 26 arranged on the air pipe 1 and used for measuring differential pressure.
The testing device further comprises an acquisition system, wherein the acquisition system comprises data acquisition equipment, a wind speed sensor 25, a static pressure differential pressure sensor 26, a rotating speed sensor, a voltage current sensor and a microphone, the wind speed sensor, the static pressure differential pressure sensor, the rotating speed sensor, the voltage current sensor and the microphone are connected with the data acquisition equipment, the rotating speed sensor and the voltage current sensor are both connected with the tested fan 8, and the microphone is used for detecting the noise of the tested fan 8.
According to the principle that the gas with low Mach number and low compression ratio can simplify the measurement parameters and the principle of generating and transmitting aerodynamic noise, when the Mach number is less than 0.15 and the compression ratio is less than 1.02, the gas flowing through the tested fan 8 can be regarded as incompressible, the testing device adopts a large air inlet 9 to ensure that the pressure of the air inlet 9 is as close to the atmospheric pressure as possible, the whole air pipe 1 is a square section, has no section change, small flow resistance and small pressure loss, the volume flow passing through the air pipe 1 is calculated through the static pressure difference and the air flow velocity inside and outside the air pipe 1, the static pressure effective power is calculated, the static pressure efficiency of the tested fan 8 is the ratio of the static pressure effective power to the input shaft power of the tested fan 8, so as to calculate the static pressure efficiency, the parameters can be calculated after the data of each sensor acquired by a data acquisition device, the aerodynamic noise generated by the pressure surface and the suction surface of the tested fan 8 is generally, or the pneumatic noise of the pressure surface is slightly larger than that of the suction surface, and the pneumatic noise of the tested fan 8 can be generally reflected by measuring the sound pressure data of a certain point or a plurality of points in a sound field on one surface, so that the measurement and evaluation can be carried out, and the device must be placed in a free field or a semi-free field with background noise lower than the noise to be measured by more than 10dB when measuring the pneumatic noise.
The method adopts a C-shaped air pipe without an additional power source to control noise, can simultaneously measure the pneumatic performance and the pneumatic noise of the tested fan 8, adopts a large air inlet 9 to ensure that the pressure of the air inlet 9 is as close to atmospheric pressure as possible, the whole course of the air pipe 1 is a square section, has no section change and small flow resistance, calculates the volume flow passing through the air pipe 1 by measuring the static pressure difference and the air flow velocity inside and outside the air pipe 1, calculates the static pressure effective power, and calculates the static pressure efficiency of the tested fan 8 as the ratio of the static pressure effective power to the input shaft power of the tested fan 8, thereby calculating the static pressure efficiency. These parameters can be calculated from the data collected by the data collection device for each sensor.
The sensors of flow velocity, static pressure, voltage, current and the like all adopt standard 5V direct current voltage power supply and 0V-5V analog signal output, are conveniently connected with general data acquisition equipment for data acquisition and power supply, and the sensors do not need an additional independent power supply.
The wind door plant regulating unit is connected with 12 pivots of wind door plant, and flow and pressure are adjusted to the certain angle of 12 revolute shafts of wind door plant, and the elasticity can be adjusted to the handle 13 other end has positioning bolt 14, and fixed wind door plant 12 is at a certain angle, also can fix wind door plant 12 at a certain angle through step motor 16 in addition, realizes automatic control and manual regulation control two kinds of modes, and two kinds of modes can switch at any time, convenient measurement and control.
The flow-rectifying grating 24 adopts an ultrafine steel wire mesh and small pore diameters, has small flow resistance and uniform air flow, is designed to be movable, can be used or not according to different flow velocity distribution states and different turbulence degrees caused by the opening degrees of the tested fan 8 and the air door plate 12, and can be used in the air pipe 1 by slightly adjusting the position of the flow-rectifying grating 24 or determining whether the flow-rectifying grating is used or not, and the flow velocity can not exceed 5m/s without installing the flow-rectifying grating 24 through testing.
The air pipe 1 main body is formed by three sections of thin steel plates which are connected through bolts, the two ends of the air pipe 1 main body are respectively provided with a fan mounting mechanism and an air inlet control mechanism, the cross section of the air pipe 1 main body is of a square structure and is composed of three layers of parts, the outmost layer is a sealing steel plate, the middle layer is bi-component sound-absorbing cotton, the innermost layer is a mesh plate, noise generated by air flow in a pipeline of the air pipe 1 and noise generated by a suction surface of a tested fan 8 can be absorbed, the sound wave reflection of the suction surface is prevented from being superposed to a sound field of a pressure surface.
The wind door plate 12 adopts a three-layer structure, the middle is made of double-component sound absorption cotton, the two sides are mesh plates, the sound waves in the pipeline can be prevented from reflecting back to a noise measuring point, the wind door plate 12 is manually adjusted and positioned by a handle 13 or automatically adjusted and positioned by a stepping motor 16, different air quantities and pressures are obtained, when the wind door plate 12 is completely opened, the air quantity is the largest, the static pressure is the lowest, a small amount of air still enters when the wind door plate is completely closed, and the static pressure is the highest.
The joint of the tested fan 8 and the air pipe 1 is provided with a rubber foaming vibration isolation pad 7 with the vibration isolation rate of more than 20dB, the tested fan 8 and the rubber foaming vibration isolation pad 7 are fixed on the fan fixing plate 6 by an elastic rope, and thin-wall vibration noise of the air pipe 1 caused by vibration of the tested fan 8 is avoided.
The testing device is designed into a movable structure, the device is provided with two supports, and the supports are connected with the air pipe 1 through bolts. The bottom of the support is provided with universal rollers capable of braking and steering, so that the support can be conveniently moved to a sound field meeting measurement requirements for measurement.
The device can be connected with a specially designed controller to realize automatic control acquisition and analysis of data, and can also be connected with general data acquisition equipment to realize manual control acquisition and analysis of data, the wind speed sensor 25 adopts a high-rigidity light PC plastic three-cup type wind speed sensor, the sensitivity is high, the inertia is small, the starting torque is small, the flow speed of 0 m/s-20 m/s can be acquired, 5V power supply is provided by the data acquisition equipment to supply power, 0V-5V analog voltage is output, and the use requirements of most of tested fans 8 on automobiles can be met. The wind speed sensor 25 and the static pressure differential pressure sensor 26 are arranged on the same cross section of the wind pipe 1 close to one end of the tested fan 8.
The static pressure differential pressure sensor 26 is adopted, an air inlet end atmospheric pressure sensor is cancelled, the high pressure end of the static pressure differential pressure sensor 26 is communicated with the atmosphere, the low pressure end of the static pressure differential pressure sensor is connected to four static pressure nozzles of the same cross section at the center of each surface of the air pipe 1 through a five-way joint, the average value of the pressure difference on the air pipe 1 is collected, the error can be reduced, the fluctuation is reduced, the static pressure differential pressure of 0 pa-500 pa can be collected, 5V power supply is provided by data collection equipment, 0V-5V analog voltage is output, and the dynamic performance measurement of the tested fan 8 in a.
The voltage and current integrated Hall type induction voltage and current sensor is adopted, a 5V power supply is provided by data acquisition equipment to supply power, 0V-5V analog voltage is output, the voltage sensor can acquire 0V-25V direct current voltage to meet the use requirements of most of tested fans 8 on automobiles, and the current sensor can acquire 0A-50A direct current to meet the use requirements of most of tested fans 8 on automobiles.
The device has the advantages of capability of simultaneously measuring the aerodynamic performance and the aerodynamic noise of the automobile fan, convenience for analyzing the relationship among various performance parameters of the fan, finding an improved scheme according to test and analysis results, contribution to optimization of the fan, small volume, simple structure, light weight, mobility, high utilization rate, simplicity in manufacture and low cost, capability of obtaining the performance parameters of the tested fan, such as noise, static pressure, flow rate, voltage, current, power, rotating speed, static pressure efficiency and the like at one time, improvement of test efficiency and reduction of test cost.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a measure testing arrangement of pneumatic performance of gas-powered fan and pneumatic noise which characterized in that: the testing device comprises an air pipe for ventilation, a fan mounting mechanism and an air inlet control mechanism, wherein one end of the air pipe is used for mounting a tested fan, the air inlet control mechanism is arranged at the other end of the air pipe and used for controlling the air inlet amount, the fan mounting mechanism is arranged on the air pipe and used for mounting a fan fixing plate of the tested fan, and the rubber foaming shock insulation pad is fixed on the fan fixing plate through an elastic rope and has a shock insulation effect.
2. The testing device of claim 1, wherein the air inlet control mechanism comprises a bowl-shaped air inlet, a connecting air pipe connecting the air inlet and the air pipe, an air door plate arranged in the connecting air pipe and connected with the connecting air pipe through a rotating shaft, and air door plate adjusting units arranged on two sides of the connecting air pipe and connected with the rotating shaft.
3. The testing device as claimed in claim 2, wherein the damper plate adjusting unit comprises a manual adjusting portion disposed at one side of the connecting air duct and connected to the rotation shaft, and an automatic adjusting portion disposed at the other side of the connecting air duct and connected to the rotation shaft.
4. The testing device as claimed in claim 3, wherein the manual adjustment portion comprises a handle having one end connected to the rotation shaft for rotating the air door plate, and a positioning bolt disposed on the connecting air pipe for fixing the other end of the handle.
5. The testing device as claimed in claim 3, wherein the automatic adjusting portion comprises a stepping motor fixed on the connecting air pipe by a fixing frame and having a rotor connected to the rotating shaft, and a motor driver disposed on the side of the air inlet for controlling the stepping motor.
6. The testing device of any one of claims 2 to 5, wherein the wind door plate comprises a first mesh plate, a second mesh plate connected with the first mesh plate and forming a cavity structure with the first mesh plate, and a first sound absorption cotton arranged in the cavity structure for absorbing sound, and the rotating shafts are arranged on two opposite sides of the first mesh plate.
7. The testing device of claim 1, wherein the air duct is a C-shaped air duct, the air duct comprises an inner layer mesh steel plate, an outer layer sealing steel plate sleeved outside the inner layer mesh steel plate and forming a cavity structure with the inner layer mesh steel plate, and a second sound-absorbing cotton arranged in the cavity structure and having a sound-absorbing effect.
8. The testing device of claim 1, further comprising first and second brackets with rollers for supporting the air duct.
9. The testing device of claim 1, further comprising a rectifying grid disposed within the duct, the testing device further comprising an air velocity sensor disposed within the duct for measuring air velocity, and a static pressure differential pressure sensor disposed on the duct for measuring differential pressure.
10. The testing device of claim 1, further comprising an acquisition system, wherein the acquisition system comprises a data acquisition device, and a wind speed sensor, a static pressure differential pressure sensor, a rotation speed sensor, a voltage current sensor and a microphone which are connected with the data acquisition device, wherein the rotation speed sensor and the voltage current sensor are both connected with the tested fan, and the microphone is used for detecting the noise of the tested fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922482515.0U CN211901045U (en) | 2019-12-31 | 2019-12-31 | Testing device for measuring pneumatic performance and pneumatic noise of gas ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922482515.0U CN211901045U (en) | 2019-12-31 | 2019-12-31 | Testing device for measuring pneumatic performance and pneumatic noise of gas ventilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211901045U true CN211901045U (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922482515.0U Active CN211901045U (en) | 2019-12-31 | 2019-12-31 | Testing device for measuring pneumatic performance and pneumatic noise of gas ventilator |
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| CN (1) | CN211901045U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565784A (en) * | 2021-07-22 | 2021-10-29 | 中国北方车辆研究所 | Flow regulating device for testing pneumatic performance of fan |
| CN117052706A (en) * | 2023-09-06 | 2023-11-14 | 江苏富丽华通用设备股份有限公司 | Fan test machine |
-
2019
- 2019-12-31 CN CN201922482515.0U patent/CN211901045U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565784A (en) * | 2021-07-22 | 2021-10-29 | 中国北方车辆研究所 | Flow regulating device for testing pneumatic performance of fan |
| CN117052706A (en) * | 2023-09-06 | 2023-11-14 | 江苏富丽华通用设备股份有限公司 | Fan test machine |
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