Axial flow fan characteristic testing device
By designing a simple axial fan characteristic testing device, and using hose and hose clamp sealing connection and manual adjustment of butterfly valve to simulate load, the problem of complex and costly testing devices in the existing technology is solved, and low-cost, rapid construction and accurate testing are achieved.
Patent Information
- Application Number
- CN202423297206.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing technologies for testing axial fan characteristic curves are complex, costly, and have long setup cycles, making them difficult to quickly set up and test.
A simple axial fan characteristic testing device was designed. It achieves a sealed connection through a hose and a hose clamp, uses a manually adjustable butterfly valve to simulate different loads, and is equipped with a temperature sensor to ensure test accuracy.
It achieves low-cost, rapid setup and testing, with accurate test results, and is suitable for industrial ventilation and air conditioning/refrigeration applications.
Smart Images
Figure CN223662137U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to axial flow fan test technical field, concretely relates to a kind of axial flow fan characteristic testing device. BACKGROUND
[0002] Fan is the mechanical of conveying gas or improving gas pressure, plays a very important role in the field such as industrial ventilation and air conditioning refrigeration.The airflow direction of axial flow fan is all along axial, generally more for large flow, low pressure occasion.In the performance test of axial flow fan, the characteristic curve needs to be tested.Because the device / equipment about fan characteristic curve test in prior art is relatively complex, and the cost of building is high, long period is. Therefore, it is extremely necessary to design a kind of test device with simple structure, low cost and fast building. INVENTION CONTENTS
[0003] For the above problems, the utility model provides a kind of axial flow fan characteristic testing device with simple structure, low test cost and accurate test result.
[0004] The utility model discloses a kind of axial flow fan characteristic testing device, including the import connection pipe being arranged at the import side of fan to be measured and the export joint being arranged at the export side of fan to be measured, the import connection pipe is connected with the import pipe of fan to be measured by first sealing connection structure, the export joint is connected with the export pipe of fan to be measured by second sealing connection structure, export joint is sealedly connected with export connection pipe in the end away from fan to be measured, the export connection pipe is connected with tail export pipe by flow regulating device;
[0005] The circumference of the export connection pipe is provided with pitot tube test hole, and the pitot tube test hole is matched with pitot tube.
[0006] The end of the import connection pipe away from fan to be measured is provided with flared;
[0007] The distance between the pitot tube test hole and the end of the export connection pipe close to fan to be measured is B, the diameter of the export connection pipe is D, and the length of the export connection pipe is A, then B>7D, A>10D.
[0008] Preferably, the first sealing connection structure includes a first rubber tube, one end of the first rubber tube is sleeved on the end of the import connection pipe close to fan to be measured, and is fixedly connected by a first throat clamp, the other end of the first rubber tube is sleeved on the import pipe of fan to be measured, and is fixedly connected with the import pipe of fan to be measured by a second throat clamp.
[0009] Preferably, the second sealing connection structure comprises a second rubber tube, the outlet connector is provided with a convex ring table on the peripheral surface of the end close to the fan to be tested, one end of the second rubber tube is sleeved on the ring table of the outlet connector and fixedly connected through a third throat clamp, and the other end of the second rubber tube is sleeved on the outlet pipe of the fan to be tested and fixedly connected with the outlet pipe of the fan to be tested through a fourth throat clamp.
[0010] Preferably, the flow regulating device is a regulating butterfly valve, the flanges on the end-to-end of the outlet connecting pipe and the tail outlet pipe are fixedly connected with one end of the regulating butterfly valve through a first clamp and the other end of the regulating butterfly valve through a second clamp.
[0011] Preferably, sealing rings are further arranged between the regulating butterfly valve and the flanges on the outlet connecting pipe and between the regulating butterfly valve and the flanges on the tail outlet pipe.
[0012] Preferably, a temperature sensor is arranged inside the end of the tail outlet pipe away from the flow regulating device.
[0013] The utility model discloses a rubber tube and throat clamp are connected with the fan to be tested and testing device, guarantee the leakproofness and reliability of connection, the inlet connecting pipe and the outlet connecting pipe can be adjusted according to the import and export size of the product to be tested, and the valve opening degree is adjusted through the manual regulating mode to simulate different loads when the fan runs, and the test of multiple test points can be carried out according to the test result, the temperature sensor arranged at the tail of the testing device can correct the test result, so as to guarantee the accuracy of the test result. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the structural schematic diagram of the utility model.
[0015] Fig. 1 is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0016] The utility model discloses a kind of axial fan characteristic testing devices, including being set in the import side of fan 4 to be tested Inlet connecting pipe 1 and being set in the export side of fan 4 to be tested Outlet connector 5, the inlet connecting pipe 1 is connected with the import pipe of fan 4 to be tested by first sealing connection structure, the outlet connector 5 is connected with the export pipe of fan 4 to be tested by second sealing connection structure, outlet connector 5 is sealedly connected with outlet connecting pipe 6 in the end away from fan 4 to be tested, and outlet connecting pipe 6 is connected with tail outlet pipe 10 by flow regulating device;
[0017] The peripheral surface of the outlet pipe 6 is provided with a Pitot tube 7 test hole, and a Pitot tube 7 is matched and installed in the Pitot tube 7 test hole;
[0018] The end of the inlet pipe 1 furthest from the fan 4 under test is flared to facilitate the inflow of air;
[0019] The distance from the test hole of the Pitot tube 7 to the end of the outlet pipe 6 closest to the fan 4 under test is B. The diameter of the outlet pipe 6 is D. The length of the outlet pipe 6 is A. Then B > 7D and A > 10D.
[0020] The first sealing connection structure includes a first hose 2. One end of the first hose 2 is sleeved on the end of the inlet pipe 1 near the fan 4 under test and is fixedly connected by a first hose clamp. The other end of the first hose 2 is sleeved on the inlet pipe of the fan 4 under test and is fixedly connected to the inlet pipe of the fan 4 under test by a second hose clamp 3.
[0021] The second sealing connection structure includes a second hose. A raised annular platform is provided on the circumferential surface of the outlet connector 5 near one end of the fan 4 under test. One end of the second hose is sleeved on the annular platform of the outlet connector 5 and fixedly connected by a third hose clamp. The other end of the second hose is sleeved on the outlet pipe of the fan 4 under test and fixedly connected to the outlet pipe of the fan 4 under test by a fourth hose clamp.
[0022] In one embodiment, the flow regulating device is a regulating butterfly valve. Flanges 11 are provided on the opposite ends of the outlet pipe 6 and the tail outlet pipe 10. The flange 11 on the outlet pipe 6 is fixedly connected to one end of the regulating butterfly valve by a first clamp 8, and the flange 11 on the tail outlet pipe 10 is fixedly connected to the other end of the regulating butterfly valve by a second clamp.
[0023] A sealing ring 12 is also provided between the regulating butterfly valve and the flange 11 on the outlet pipe 6, and a sealing ring 12 is also provided between the regulating butterfly valve and the flange 11 on the tail outlet pipe 10.
[0024] A temperature sensor is installed inside the end of the tail outlet pipe 10 away from the flow regulating device. The regulating butterfly valve can be a manually adjustable butterfly valve 9.
[0025] The diameter of the interface connector is consistent with the diameter of the inlet pipe of the fan under test 4; the diameter of the outlet connector 5 is consistent with the diameter of the outlet pipe of the fan under test 4.
[0026] During testing, manually adjust the butterfly valve 9 to the fully open position, place a temperature detection device at the outlet of the tail outlet pipe 10 (a temperature sensor can be used to monitor the outlet temperature), power on the fan under test 4, and after the fan under test 4 runs stably, record the current, voltage, fan outlet total pressure, static pressure and temperature to complete the relevant tests.
Claims
1. An axial fan characteristic testing device, comprising an inlet connector disposed on the inlet side of the fan under test and an outlet connector disposed on the outlet side of the fan under test, characterized in that, The inlet connector is connected to the inlet pipe of the fan under test through a first sealing connection structure, and the outlet connector is connected to the outlet pipe of the fan under test through a second sealing connection structure. The end of the outlet connector away from the fan under test is sealed with an outlet connector, and the outlet connector is connected to a tail outlet pipe through a flow regulating device. A Pitot tube test hole is provided on the circumferential surface of the outlet pipe, and a Pitot tube is installed in the Pitot tube test hole. The end of the inlet connector furthest from the fan under test is flared. The distance from the Pitot tube test hole to the end of the outlet connector closest to the fan under test is B, the diameter of the outlet connector is D, and the length of the outlet connector is A. Then B > 7D and A > 10D.
2. The axial fan characteristic testing device as described in claim 1, characterized in that, The first sealing connection structure includes a first hose, one end of which is sleeved on the end of the inlet pipe near the fan under test and fixedly connected by a first hose clamp, and the other end of the first hose is sleeved on the inlet pipe of the fan under test and fixedly connected to the inlet pipe of the fan under test by a second hose clamp.
3. The axial fan characteristic testing device as described in claim 1, characterized in that, The second sealing connection structure includes a second hose. A raised annular platform is provided on the circumferential surface of the outlet connector near the end of the fan under test. One end of the second hose is sleeved on the annular platform of the outlet connector and fixedly connected by a third hose clamp. The other end of the second hose is sleeved on the outlet pipe of the fan under test and fixedly connected to the outlet pipe of the fan under test by a fourth hose clamp.
4. The axial fan characteristic testing device as described in claim 1, characterized in that, The flow regulating device is a regulating butterfly valve. Flanges are provided on the opposite ends of the outlet pipe and the tail outlet pipe. The flange on the outlet pipe is fixedly connected to one end of the regulating butterfly valve by a first clamp, and the flange on the tail outlet pipe is fixedly connected to the other end of the regulating butterfly valve by a second clamp.
5. The axial fan characteristic testing device as described in claim 4, characterized in that, A sealing ring is also provided between the regulating butterfly valve and the flange on the outlet pipe, and a sealing ring is also provided between the regulating butterfly valve and the flange on the tail outlet pipe.
6. The axial fan characteristic testing device as described in claim 1, characterized in that, A temperature sensor is installed inside the end of the tail outlet pipe away from the flow regulating device.