TWI632296B - Test system for fan blade tolerant fluid pressure strength and test method thereof - Google Patents

Abstract

The invention provides a test system for fan blade tolerant fluid pressure strength and a test method thereof. The system includes: a casing defining a chamber for receiving the blade; a driving device having a transmission rod extending into the chamber to connect the blade, and driving the blade rotation through the transmission rod; a fluid source Providing a fluid through a pressurized pump into the chamber of the tank such that the blades in the chamber rotate in the pressurized fluid and stop after a predetermined rotation time, and then according to the blade A change in at least one of the appearance and working efficiency and working noise determines the strength of the blade's resistance to fluid pressure.

Description

Test system for fan blade tolerant fluid pressure strength and Test method

The invention relates to the field of fan blade testing, in particular to a test system for fan blade tolerant fluid pressure strength and a test method thereof.

Most of the early fan design development and analysis is based on the measurement of wind tunnel experiments. The fan can test the fan static pressure and air volume performance curve and the non-sound chamber test wind cut noise through the wind tunnel test to verify the design. Under the ever-changing technological progress, the computing power of computers has also been greatly improved, which has led to continuous innovation and development of numerical analysis methods and techniques, and the computational efficiency has also been greatly improved. The numerical analysis method finds the flow field phenomenon of the entire fan and the inner region by, for example, an analytical tool of Computational Fluid Dynamics (CFD).

However, neither wind tunnel experiments nor numerical analysis provide testing or analysis of fan blade tolerant fluid pressure strength, so how to determine fan blade tolerant fluid pressure strength is the direction that people in the field are striving for.

Accordingly, in order to effectively solve the above problems, an object of the present invention is to provide a test system for operating a blade in a pressurized fluid to test the blade's resistance to fluid pressure.

Another object of the present invention is to provide a test method for operating a fan blade in a pressurized fluid to test the blade's resistance to fluid pressure.

Another object of the present invention is to provide a test for detecting the shape and working efficiency of a blade subjected to a pressure resistance of a tolerant fluid and the change in at least one of the working noise to determine the strength of the blade to withstand fluid pressure. In order to achieve the above object, the present invention provides a test system for a blade tolerant fluid pressure strength, comprising: a casing defining a chamber for accommodating the blade; and a driving device having a transmission rod Extending into the chamber to connect the blade, and driving the blade to rotate through the transmission rod; a fluid source providing a fluid into the chamber of the tank; a pressure pump connecting the fluid source and the tank, The fluid of the fluid source is pressurized by the pressurization pump and flows into the chamber of the tank to cause the blades in the chamber to rotate in the pressurized fluid.

The present invention further provides a test method for a blade tolerant fluid pressure strength, comprising: arranging a blade in a chamber of a casing and connecting the blade to a transmission of a driving device a rod; a fluid is supplied from a fluid source to be pressurized by a pressure pump to a predetermined fluid pressure and then flows into the tank; the driving device drives the blade to rotate in the fluid of the predetermined fluid pressure at a predetermined rotational speed And stop running after a preset rotation time.

In one implementation, the driving device is coupled to a tachometer and a timer that adjusts the driving speed of the driving device, and the timer sets the driving time of the driving device.

In one implementation, a pressure sensor is provided in the chamber of the housing to sense the fluid pressure in the chamber of the housing. In one implementation, the fluid source communicates the pressurized pump and the chamber of the tank via a conduit.

In one implementation, the flow system comprises: compressed air, nitrogen, vegetable oil, kerosene, distilled water.

In one implementation, the testing method further comprises: determining the strength of the blade's tolerant fluid pressure based on the shape of the blade and the change in at least one of the working performance and the working noise.

11‧‧‧ cabinet

111‧‧‧ chamber

12‧‧‧ drive

121‧‧‧Transmission rod

13‧‧‧ Fluid source

14‧‧‧Pressure pump

15‧‧‧ fan leaves

151‧‧ wheels

152‧‧‧ blades

16‧‧‧Tachometer

17‧‧‧Timer

18‧‧‧ Pipes

19‧‧‧ Pressure Sensor

SP1~SP4‧‧‧Steps

The following drawings are intended to provide a more complete understanding of the invention, and are in the The specific embodiments of the present invention are described in detail by reference to the specific embodiments herein,

The first picture is a schematic diagram of the creation test system; the second picture is the schematic diagram of the first type of fan blade; the second picture is the schematic diagram of the second type of fan blade; the third picture is the creation test method Flowchart; Figure 4 is a flow chart of another test method for this creation.

The above object of the present invention, as well as its structural and functional features, will be described in accordance with the preferred embodiments of the drawings.

Please refer to Figure 1 for a schematic diagram of the creation test system; Figure 2A is a schematic diagram of the first fan blade; and Figure 2B is a schematic diagram of the second blade of the creation. As shown, the test system of the present invention is used to test the strength of a blade-tolerant fluid pressure. The test system includes a tank 11, a drive unit 12, a fluid source 13, and a pressurizing pump 14.

The chamber 11 defines a chamber 111 for receiving the fan blade 15, and the chamber 111 serves as a test space. The driving device 12 has a transmission rod 121 extending into the chamber 111 to connect the blade 15, and the blade 15 is driven to rotate by the transmission rod 121. The blade 15 includes a hub 151 and blades 152 disposed about the hub, such as but not limited to axial fan blades (as in Figure 2A) or centrifugal blades (as in Figure 2B).

The drive unit 12 is, for example, a DC or AC motor that adjusts the rotational speed of the drive to rotate the blade 15 at a predetermined rotational speed. The fluid source 13 provides a fluid outside the tank 11 into the chamber 111 of the tank 11, such as, but not limited to, compressed air, nitrogen, vegetable oil, kerosene or distilled water.

The pressure pump 14 is connected between the fluid source 13 and the tank 11. The fluid source 13 communicates with the pressurizing pump 14 and the chamber 111 of the tank 11 via a conduit 18, and the fluid of the fluid source 13 is The pipe 18 is first pressurized by the pressurizing pump 14 and then flows into the chamber 111 of the casing 11 through the pipe 18, so that the fluid flowing into the chamber 111 has a predetermined fluid pressure.

Further, although the figure shows that the pressurizing pump 14 is disposed outside the casing 11, in another alternative embodiment, the pressurizing pump 14 may be disposed in the chamber 111 of the casing 11 when fluid flows into the chamber. After 111, the fluid in the chamber 111 is pressurized. The fluid flowing into the chamber 111 at least floods the blade 15, or fills the entire chamber 111 to cause the blade 15 within the chamber 111 to rotate in the pressurized fluid.

The driving device 12 is connected to a tachometer 16 for adjusting the driving speed of the driving device 12, and a timer 17 for setting the driving time of the driving device 12. The blade 15 operates at a preset test time, wherein the drive time is determined according to the specifications of each blade, such as the size of the blade and the use of the blade.

In addition, a pressure sensor 19 is connected to the chamber 111 of the casing 11 to connect the pressure pump 14. The pressure sensor 19 senses the fluid pressure in the chamber 111, and the pressure pump 14 according to the The sensing of the pressure sensor 19 adjusts the pressurization of the fluid to ensure that the fluid within the chamber 111 reaches a predetermined fluid pressure.

Please continue to refer to Figure 3 for a flow chart of this creative test method. As shown in the figure together with reference to Figure 1, the test method of the present invention places the blade in the test system as described in Figure 1 above, including the following steps:

Step 1 (SP1): A blade is placed in a chamber of a casing, and the blade is coupled to a transmission rod of a driving device. In this step, the blade 15 (for example, an axial fan blade or a centrifugal fan blade) is placed in the chamber 111 of the casing 11 and combined with the transmission rod 121 of the driving device 12, between the blade 15 and the transmission rod 121. The combination can be a screw lock or a snap or snap.

Step 2 (SP2): a fluid is supplied from a fluid source through a pressurized pump to a predetermined fluid pressure and then flows into the tank. In this step, the fluid source 13 is turned on to cause the fluid to flow into the pressurizing pump 14 through the conduit 18, and then flow from the pressurizing pump 14 through the conduit 18 into the chamber 111, and the pressurizing pump 14 pressurizes the fluid so that it flows into the chamber 111. The fluid is pressurized to a predetermined fluid pressure, and by the pressure of the pressure sensor 19 in the chamber 111, the pressurizing pump 14 adjusts the pressurization of the fluid according to the sensing of the pressure sensor 19, To ensure that the fluid in chamber 111 reaches a predetermined fluid pressure.

Step 3 (SP3): The driving device drives the blade to rotate in the fluid of the preset fluid pressure at a preset rotation speed, and stops after a predetermined rotation time. In this step, after the fluid flowing into the chamber 111 floods the fan blade 15 or fills the entire chamber 111, the injection of fluid into the chamber 111 is stopped, and the driving device 12 is activated to drive the blade 15 at a preset fluid pressure. The fluid is rotated, wherein the drive unit 12 can adjust the drive speed via the tachometer 16 and set the drive time via the timer 17 to cause the blade 15 to operate at a predetermined speed for a predetermined test time.

The present invention passes through steps 1 through 3 above to operate the blade 15 in a fluid having pressure to test the strength of the blade 15 against fluid pressure, for example, placing the blade 15 in the cavity of the casing 11. In the chamber 111, the fluid was pressurized to 5 Kg, and the driving device 12 was driven to rotate the blade 15 at a rotational speed of 5000 rpm for 5 hours at a fluid pressure of 5 kg to test the strength of the blade 15 against fluid pressure.

Please continue to refer to FIG. 4 for another flow chart of the test method. The difference between this figure and FIG. 3 is that it further includes step 4 (SP4) after step 3 (SP3), which is step 4 (SP4): The strength of the blade's tolerant fluid pressure is determined based on the shape of the blade and the change in at least one of the operational efficiency and the working noise. In this step, the aforementioned blade 15 subjected to the pressure resistance of the fluid is taken out from the chamber 111 of the casing 11, and then the blade is judged according to the shape and/or working efficiency of the blade and/or the change of the working noise. The withstand strength of 15.

The aforementioned blade shape refers to whether the blade is deformed or broken, and whether the blade is deformed can be measured by contact measurement (for example, measuring head) or non-contact measurement (for example, 3D using a 3D laser scanning measuring instrument) Non-contact optical measurement), through which the axial deformation and radial deformation values of the blade are measured.

The above work efficiency refers to the measurement of the wind pressure-wind volume curve (PQ curve) by placing the fan blade into the wind tunnel tester, and the air volume refers to the total volume of air sent or taken in per minute by the fan blade. The air volume unit is CFM, which is Cubic Feet per Minute; if it is calculated in cubic meters, it is CMM (Cubic Meters per Minute). The wind pressure of the fan is also called static pressure, which refers to the difference in air pressure between the inlet and the outlet of the fan. It is usually used in units of metric water column height (mmH ₂ O) or inch water column height (inchH ₂ O). .

The aforementioned abnormal sound means that the fan blade is placed in the muffler chamber for measurement, and generally the noise of the muffler chamber is less than 17 dB.

For example, the blade 15 that has been continuously rotated for 1 hour at a rotational speed of 5 kg at a rotational speed of 5000 rpm is taken out of the casing, and then judged according to whether the blade 15 is broken, if the blade 15 is broken, the blade 15 is not Passed the test. Furthermore, if the blade 15 is not broken, it is measured whether the axial deformation of the blade 15 is less than or equal to 0.1 mm; whether the radial deformation is less than 0.2 mm, and whether the wind pressure is less than or equal to 12 mm water column; whether the air volume is less than or equal to 5 CFM Whether the abnormal sound is less than or equal to 33 decibels determines whether the blade 15 has passed the test. The numerical values of the items in the examples are not limited to the present invention and can be set according to the needs of the tester.

The blade 15 is operated in a pressurized fluid by the above system and method to test the tolerated fluid pressure strength of the blade 15, and to detect the shape of the blade 15 subjected to the test of the withstand fluid pressure strength. And a change in at least one of the work efficiency and the work noise determines whether the strength of the blade 15 that withstands the fluid pressure passes the test.

It is to be understood that the above-described methods, shapes, configurations, and devices of the present invention are intended to be included within the scope of the present invention.

Claims (9)

A test system for the resistance of a blade to a fluid pressure is applied to a blade. The test system includes: a casing defining a chamber for accommodating the blade; and a driving device having a transmission rod extending to The chamber is connected to the fan blade and drives the blade to rotate through the transmission rod; a fluid source provides a fluid into the chamber of the tank; a pressure pump connects the fluid source and the tank; a pressure a sensor disposed in the chamber and connected to the pressure pump, the pressure sensor sensing a fluid pressure in a chamber of the tank, the fluid of the fluid source being pressurized by the pressure pump and flowing into the tank The chamber of the body is such that the blades in the chamber rotate in the pressurized fluid. The test system of claim 1, wherein the driving device is connected to a tachometer and a timer, wherein the tachometer is used to adjust a driving speed of the driving device, and the timer is used to set the driving of the driving device. time. The system of claim 1 wherein the fluid source communicates the pressurized pump and the chamber of the tank via a conduit. The test system of claim 1, wherein the pressurizing pump is disposed outside the tank. The test system of claim 1, wherein the pressurizing pump is disposed within a chamber of the housing. The test system of claim 1, wherein the flow system comprises: compressed air, nitrogen, vegetable oil, kerosene, distilled water. A test method for the resistance of a blade to a fluid pressure comprises: arranging a blade in a chamber of a casing and connecting the blade to a transmission rod of a driving device; providing a fluid through a fluid source a pressurized pump is pressurized to a predetermined fluid pressure and then flows Entering the tank, the pressure pump is coupled to a pressure sensor to stabilize the predetermined fluid pressure; the driving device drives the blade to rotate in the fluid of the predetermined fluid pressure at a preset speed, and passes a preset Stop running after turning the time. The test method of claim 7, further comprising: determining the strength of the blade's withstand fluid pressure based on the shape of the blade and the change in at least one of the working efficiency and the working noise. The test method of claim 7, wherein the flow system comprises: compressed air, nitrogen, vegetable oil, kerosene, distilled water.