PIV flow field measurement test support frame for heat dissipation fan

Abstract

This utility model discloses a PIV flow field measurement test support frame for a cooling fan. The upper connecting frame has multiple upper fixing holes, which are used to support the end face of the cooling fan outside or inside the fan's airflow hole area, with one end of each upper fixing hole abutting against the end face of the cooling fan. Hot melt adhesive is dripped into the upper fixing holes to fix the cooling fan to the upper connecting frame. The lower connecting frame is used for detachable support and fixation on a test platform or base. The upper end of the vertical cylinder frame is fixed to the upper connecting frame, and the lower end of the vertical cylinder frame is fixed to the lower connecting frame. When the fan's airflow hole area is located inside the vertical cylinder frame on the vertical projection plane, the vertical cylinder frame has through holes. This utility model can conveniently and stably support a cooling fan model to complete the PIV test, ensuring that hot melt adhesive will not enter the fan's interior and damage the model, and ensuring that the cooling fan model can be quickly disassembled and installed without affecting the cooling fan's flow field.

Description

Technical Field

[0001] This utility model relates to the field of PIV flow field measurement and testing technology for cooling fans, and in particular to a support frame for PIV flow field measurement and testing for cooling fans. Background Technology

[0002] Vehicles, new energy storage devices, desktop computers, and laptops all generate heat during operation. Cooling fans are an efficient, stable, and safe way to dissipate heat. By rapidly rotating, the fans remove the heat generated by these devices, preventing overheating and ensuring normal operation.

[0003] As equipment performance improves, the amount of heat generated also increases. This places higher demands on the cooling efficiency of cooling fans. Increasing cooling fan power leads to increased fan noise, which, for electronic devices, negatively impacts user experience and reduces their market competitiveness; for automobiles, it can cause driver discomfort and affect driving safety. Therefore, while increasing airflow, it is also necessary to control or even reduce cooling fan noise to enhance the market competitiveness of cooling fans.

[0004] The noise and airflow of a cooling fan both depend on its flow field (i.e., airflow field). Currently, research on the flow characteristics of cooling fans primarily utilizes computational fluid dynamics (CFD) methods, lacking real-world flow field data. Particle image velocimetry (PIV) is a non-contact flow field measurement technique. Since cooling fans have limited dimensions, scaling is unnecessary when conducting PIV experiments. PIV experiments can obtain realistic internal and external flow fields of the cooling fan, guiding its design and enhancing its market competitiveness.

[0005] Maintaining the stability of the cooling fan during PIV testing is essential. Currently, there is a lack of support frames to support and fix the cooling fan for PIV cooling fan internal and external flow field measurement tests. Utility Model Content

[0006] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this invention is to provide a PIV flow field measurement test support frame for a cooling fan, which can conveniently and stably support a cooling fan model to complete the PIV test, enabling rapid disassembly of the cooling fan model without affecting the flow field of the cooling fan.

[0007] The PIV flow field measurement test support frame for the cooling fan according to an embodiment of the present invention is an aluminum alloy part, comprising:

[0008] The upper connecting frame is provided with a plurality of upper fixing holes. The upper connecting frame is used to support the end face position outside or inside the fan hole area of ​​the cooling fan and correspondingly, one end of the plurality of upper fixing holes abuts against the end face position of the cooling fan. Hot melt adhesive is used to be placed in the plurality of upper fixing holes to fix the cooling fan to the upper connecting frame.

[0009] The lower connecting frame is used for detachable support and fixation on the test platform or base;

[0010] A vertical frame, the upper end of which is fixed to the upper connecting frame, and the lower end of which is fixed to the lower connecting frame; when the fan hole area of ​​the cooling fan is located inside the vertical frame on the vertical projection plane, the peripheral wall of the vertical frame is provided with through holes.

[0011] According to the present invention, the PIV flow field measurement test support frame for cooling fans is used by attaching the end face of the cooling fan (outside the fan hole area or inside the fan hole area) to the upper connecting frame according to the structure of the upper connecting frame. Hot melt adhesive is dripped into the upper fixing hole of the upper connecting frame to firmly adhere the end face of the cooling fan to the hole wall of the upper fixing hole, thereby fixing the cooling fan to the upper connecting frame. The lower connecting frame is directly and detachably fixed to the test platform or the base. When the lower connecting frame is fixed to the base, the base is then directly placed on the test platform. Thus, the cooling fan is stably supported and fixed in the PIV flow field measurement test support frame for cooling fans according to the present invention is completed.

[0012] The PIV flow field measurement test support frame for the cooling fan of this utility model embodiment is an important component of the PIV process test of the cooling fan. It can conveniently and stably support the cooling fan, ensuring the stability of the cooling fan during the PIV test to complete the PIV test. At the same time, it does not affect the flow field at the air inlet and outlet of the cooling fan, which helps to ensure the authenticity of the test data.

[0013] In some embodiments, the vertical cylinder frame includes an upper cylinder frame and a lower cylinder frame; the upper end of the upper cylinder frame is fixed to the upper connecting frame and the upper cylinder frame and the upper connecting frame are integrally formed, the lower end of the lower cylinder frame is fixed to the lower connecting frame and the lower cylinder frame and the lower connecting frame are integrally formed, the upper cylinder frame and the lower cylinder frame are threadedly engaged and fixed, and the connection is reinforced with thread-locking adhesive; or, the vertical cylinder frame is an integral structure and is integrally formed with the upper connecting frame and the lower connecting frame.

[0014] In some embodiments, when the fan hole area of ​​the cooling fan is located inside the vertical cylinder frame on the vertical projection plane, the through holes are distributed circumferentially on the upper cylinder frame, or the through holes are distributed circumferentially on the upper cylinder frame and circumferentially on the lower cylinder frame, or the through holes are distributed circumferentially on the integral vertical cylinder frame.

[0015] In some embodiments, the upper connecting frame is a horizontally arranged annular frame, which is fixed to the upper outer periphery of the vertical cylindrical frame and the vertical cylindrical frame does not protrude upward from the annular frame. The upper surface of the annular frame is used to support the annular position of the end face outside the fan hole area of ​​the horizontally arranged cooling fan, and the fan hole area of ​​the cooling fan is located inside the vertical cylindrical frame in the vertical projection plane accordingly. A plurality of upper fixing holes are evenly distributed circumferentially along the annular frame, and the plurality of upper fixing holes are located outside the vertical cylindrical frame in the vertical projection direction.

[0016] In some embodiments, the upper connecting frame is a horizontally arranged plate, the upper surface of which is used to support the end face position within the fan hole area of ​​the horizontally arranged cooling fan, and a plurality of upper fixing holes are evenly distributed along the edge of the plate, and the plurality of upper fixing holes are located outside the vertical cylinder frame in the vertical projection direction.

[0017] In some embodiments, the upper connecting frame is a horizontally arranged first cantilever plate, the fixed end of the first cantilever plate is fixed to the top of the vertical cylinder frame, the upper surface of the free end of the first cantilever plate is used to support the end face of the horizontally arranged cooling fan outside the fan blade area, and a plurality of upper fixing holes are distributed at the free end of the first cantilever plate.

[0018] In some embodiments, the upper connecting frame is a second cantilever plate arranged vertically, the fixed end of the second cantilever plate is fixed to the top of the vertical cylinder frame, one side surface of the free end of the second cantilever plate is used to support the end face of the vertically arranged cooling fan outside the fan blade area, and a plurality of upper fixing holes are distributed at the free end of the second cantilever plate.

[0019] In some embodiments, the lower connecting frame includes a horizontally arranged ring plate fixed to the lower outer periphery of the vertical frame.

[0020] In some embodiments, the ring plate is provided with a plurality of lower fixing holes along the circumferential direction, and the plurality of lower fixing holes are used to provide hot melt adhesive or threaded parts, so as to fix the lower connecting frame on the test platform or the base.

[0021] In some embodiments, the plurality of lower fixing holes are evenly distributed at circumferential intervals along the ring plate.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] Figure 1a This is a schematic diagram of the upper integral molded part of the first type of PIV flow field measurement test support frame for cooling fans according to the present utility model embodiment;

[0024] Figure 1b This is a schematic diagram of the lower half of the integrally molded part of the first type of PIV flow field measurement test support frame for cooling fans according to an embodiment of this utility model.

[0025] Figure 1c This is a schematic diagram of the assembly of the upper connecting frame and the cooling fan of the first type of PIV flow field measurement test support frame for cooling fans according to the present utility model embodiment.

[0026] Figure 1d This is a schematic diagram of the assembly of the lower connecting frame and the test platform of the first type of PIV flow field measurement test support frame for cooling fans according to the present invention.

[0027] Figure 1e This is a schematic diagram of the application scenario of the first type of PIV flow field measurement test support frame for cooling fans according to the present utility model embodiment;

[0028] Figure 2a This is a schematic diagram of the structure of the second type of PIV flow field measurement test support frame for cooling fans according to an embodiment of this utility model;

[0029] Figure 2b This is a schematic diagram of the assembly of the upper connecting frame and the cooling fan of the second type of PIV flow field measurement test support frame for cooling fans according to an embodiment of this utility model.

[0030] Figure 2c This is a schematic diagram of the assembly of the lower connecting frame and the test platform of the second type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment;

[0031] Figure 2d This is a schematic diagram illustrating the application scenario of the second type of PIV flow field measurement test support frame for cooling fans according to an embodiment of this utility model;

[0032] Figure 3a This is a schematic diagram of the upper integral molded part of the third type of PIV flow field measurement test support frame for cooling fans according to the present utility model embodiment;

[0033] Figure 3bThis is a schematic diagram of the lower half of the integrally molded part of the PIV flow field measurement test support frame for the third embodiment of this utility model;

[0034] Figure 3c This is a schematic diagram of the assembly of the upper connecting frame and the cooling fan of the third type of PIV flow field measurement test support frame for cooling fans according to the present utility model embodiment;

[0035] Figure 3d This is a schematic diagram illustrating the application scenario of the third type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment;

[0036] Figure 4a This is a schematic diagram of the structure of the fourth type of PIV flow field measurement test support frame for cooling fans according to the present invention;

[0037] Figure 4b This is a schematic diagram of the assembly of the upper connecting frame and the cooling fan of the fourth type of PIV flow field measurement test support frame for cooling fans according to the present utility model.

[0038] Figure 4c This is a schematic diagram of the assembly of the lower connecting frame and the test platform of the fourth type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment;

[0039] Figure 4d This is a schematic diagram illustrating the application scenario of the fourth type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment;

[0040] Figure 5a This is a schematic diagram of the upper integral molded part of the fifth type of PIV flow field measurement test support frame for cooling fans according to the present utility model embodiment;

[0041] Figure 5b This is a schematic diagram of the lower half of the integrally molded part of the PIV flow field measurement test support frame for the fifth embodiment of this utility model;

[0042] Figure 5c This is a schematic diagram of the assembly of the upper connecting frame and the cooling fan of the fifth type of PIV flow field measurement test support frame for cooling fans according to the present utility model.

[0043] Figure 5d This is a schematic diagram of the assembly of the lower connecting frame and the test platform of the fifth type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment;

[0044] Figure 5e This is a schematic diagram illustrating the application scenario of the fifth type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment;

[0045] Figure 6aThis is a schematic diagram of the structure of the sixth type of PIV flow field measurement test support frame for cooling fans according to the present invention;

[0046] Figure 6b This is a schematic diagram of the assembly of the upper connecting frame and the cooling fan of the sixth type of PIV flow field measurement test support frame for cooling fans according to the present utility model.

[0047] Figure 6c This is a schematic diagram of the assembly of the lower connecting frame and the test platform of the sixth type of PIV flow field measurement test support frame for cooling fans according to the present utility model embodiment;

[0048] Figure 6d This is a schematic diagram illustrating the application scenario of the sixth type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment;

[0049] Figure 7a This is a schematic diagram of the upper integral molded part of the seventh type of PIV flow field measurement test support frame for cooling fans according to the present utility model embodiment;

[0050] Figure 7b This is a schematic diagram of the lower half of the integrally molded part of the PIV flow field measurement test support frame for the seventh embodiment of this utility model.

[0051] Figure 7c This is a schematic diagram of the assembly of the upper connecting frame and the cooling fan of the seventh type of PIV flow field measurement test support frame for cooling fans according to the present utility model.

[0052] Figure 7d This is a schematic diagram of the assembly of the lower connecting frame and the test platform of the seventh type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment;

[0053] Figure 7e This is a schematic diagram illustrating the application scenario of the seventh type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment;

[0054] Figure 8a This is a schematic diagram of the structure of the eighth type of PIV flow field measurement test support frame for cooling fans according to the present utility model embodiment;

[0055] Figure 8b This is a schematic diagram illustrating the application scenario of the eighth type of PIV flow field measurement test support frame for cooling fans according to this utility model embodiment.

[0056] Figure Labels

[0057] The cooling fan uses a PIV flow field measurement test support frame 1000; upper connecting frame 1; upper fixing hole 101; ring frame 102; flat plate 103; first cantilever plate 104; second cantilever plate 105; lower connecting frame 2; ring plate 201; lower fixing hole 202; vertical cylinder frame 3; upper cylinder frame 301; lower cylinder frame 302; through hole 303; cooling fan 4; test platform 5. Detailed Implementation

[0058] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0059] The following is combined with Figures 1a to 8b This invention relates to a utility model of a PIV flow field measurement test support frame 1000 for a cooling fan, which is described in an embodiment of the present invention.

[0060] like Figures 1a to 8b As shown, the PIV flow field measurement test support frame 1000 for cooling fans according to an embodiment of this utility model is made of aluminum alloy, which is lightweight and ensures the stability of the cooling fan. At the same time, hot melt adhesive can adhere well to the aluminum alloy. The PIV flow field measurement test support frame 1000 for cooling fans according to this utility model includes an upper connecting frame 1, a lower connecting frame 2, and a vertical cylindrical frame 3.

[0061] The upper connecting bracket 1 is provided with multiple upper fixing holes 101, and the upper connecting bracket 1 is used to support the cooling fan 4 outside the fan hole area (see reference). Figure 1c , Figure 1e , Figure 2b , Figure 2d , Figure 5c , Figure 5e , Figure 6b , Figure 6d , Figure 7c , Figure 7e , Figure 8b ) or within (reference) Figure 3c , Figure 3d , Figure 4b , Figure 4dThe upper connecting bracket 1 is positioned on the end face of the cooling fan 4, with one end of each of the multiple upper fixing holes 101 abutting against the end face of the cooling fan 4. Hot melt adhesive is applied to the multiple upper fixing holes 101 to fix the cooling fan 4 to the upper connecting bracket 1. Specifically, the fan hole area refers to the central annular area on the cooling fan 4; outside the fan hole area refers to the outer area of ​​the aforementioned annular area of ​​the cooling fan 4; and inside the fan hole area refers to the inner area of ​​the aforementioned annular area of ​​the cooling fan 4, i.e., the central area of ​​the cooling fan 4. The upper connecting bracket 1 can easily contact the end face of the cooling fan 4, either outside or inside the fan hole area, to support the cooling fan 4 without obstructing or blocking the fan hole area. This ensures that the flow field at the air inlet of the cooling fan 4 is not affected, guaranteeing the authenticity of the experiment. By providing multiple upper fixing holes 101 on the upper connecting frame 1, when the upper connecting frame 1 contacts the end face of the cooling fan 4 outside or inside the fan hole area, one end of each upper fixing hole 101 abuts against the end face of the cooling fan 4 outside or inside the fan hole area. This allows hot melt adhesive to be dripped into each fixing hole, firmly adhering the end face of the cooling fan 4 to the hole wall of the upper fixing hole 101, thereby fixing the cooling fan 4 to the upper connecting frame 1. This improves the stability of the cooling fan 4 fixed on the PIV flow field measurement test support frame 1000 for the cooling fan in this embodiment of the present invention. Moreover, the hot melt adhesive dripped into the upper fixing holes 101 will not overflow to other parts of the cooling fan 4, ensuring that the interface between the cooling fan 4 and the upper connecting frame 1 is not filled with hot melt adhesive, and ensuring that the cooling fan 4 can maintain the required posture, such as a horizontal or vertical posture, during the test.

[0062] The lower connecting bracket 2 is used for detachable support and fixation on the test platform 5 or the base (not shown in the figure), which helps ensure the stability of the cooling fan 4 during the test. The lower connecting bracket 2 is fixed to the base. For example, if the base is made of stainless steel, bolts are used to fix the lower connecting bracket 2 and the base; if the base is made of aluminum alloy, hot melt adhesive is used to fix the lower connecting bracket 2 and the base. Then, the base is placed directly on the test platform 5. The base effectively adds counterweight, making the cooling fan 4 more stable.

[0063] The upper end of the vertical cylinder frame 3 is fixed to the upper connecting frame 1, and the lower end of the vertical cylinder frame 3 is fixed to the lower connecting frame 2. That is, the vertical cylinder frame 3 is connected between the upper connecting frame 1 and the lower connecting frame 2, and plays the role of supporting the upper connecting frame 1. The interior of the vertical cylinder frame is hollow, which reduces the weight of the support frame and ensures the stability of the cooling fan and the support frame during the test.

[0064] refer to Figures 1a to 2dWhen the air vent area of ​​the cooling fan 4 is located inside the vertical frame 3 on the vertical projection plane, the peripheral wall of the vertical frame 3 is provided with a through hole 303. This through hole 303 can be a regular or irregular hole; for example, it can be a round or square hole. By providing the through hole 303, the airflow into the air inlet of the cooling fan 4 is not interfered with. However, when the air vent area of ​​the cooling fan 4 is located outside the vertical frame 3 on the vertical projection plane, the through hole 303 is not required on the peripheral wall of the vertical frame 3.

[0065] According to the embodiment of the present invention, the PIV flow field measurement test support frame 1000 for cooling fans is used by placing the end face of the cooling fan 4 outside the fan hole area or the end face inside the fan hole area against the upper connecting frame 1, depending on the structure of the upper connecting frame 1. Hot melt adhesive is dripped into the upper fixing hole 101 of the upper connecting frame 1, so that the hot melt adhesive firmly adheres to the end face of the cooling fan 4 and the hole wall of the upper fixing hole 101, thereby fixing the cooling fan 4 to the upper connecting frame 1. The lower connecting frame 2 is directly and detachably fixed to the test platform 5 or the base. After the lower connecting frame 2 is fixed to the base, the base is then directly placed on the test platform 5. Thus, the cooling fan 4 is stably supported and fixed in the PIV flow field measurement test support frame 1000 for cooling fans according to the embodiment of the present invention is completed.

[0066] The PIV flow field measurement test support frame 1000 for the cooling fan of this utility model embodiment is an important component of the PIV process test of the cooling fan 4. It can conveniently and stably support the cooling fan 4, ensuring the stability of the cooling fan 4 during the PIV test to complete the PIV test. At the same time, it does not affect the flow field at the air inlet and outlet of the cooling fan 4, which helps to ensure the authenticity of the test data.

[0067] In some embodiments, such as Figures 1a to 1e , Figures 3a to 3d , Figures 5a to 5e , Figures 7a to 7eAs shown, the vertical frame 3 includes an upper frame 301 and a lower frame 302. The upper end of the upper frame 301 is fixed to the upper connecting frame 1, and the upper frame 301 and the upper connecting frame 1 are integrally molded parts, which are easy to process and have a stable and reliable structure. The lower end of the lower frame 302 is fixed to the lower connecting frame 2, and the lower frame 302 and the lower connecting frame 2 are integrally molded parts, which are easy to process and have a stable and reliable structure. The upper frame 301 and the lower frame 302 are fixed with threads and reinforced with thread-locking adhesive. The thread-locking adhesive makes the thread structure more stable, which is beneficial for adjusting the height of the upper connecting frame 1 and the cooling fan 4. At the same time, the thread-locking adhesive is also easy to remove. This height-adjustable cooling fan PIV flow field measurement test support frame 1000 is used in the pre-testing stage of PIV process testing for the cooling fan 4. It allows adjustment of the cooling fan 4's height based on its airflow. After passing the pre-testing stage, the required height position of the cooling fan 4 for the formal test can be determined, i.e., the required height dimension of the PIV flow field measurement test support frame 1000 for the formal test can be determined, facilitating the next step of the formal test. During the formal test, the threaded structure between the upper cylinder frame 301 and the lower cylinder frame 302 is secured with thread-locking adhesive.

[0068] Or, such as Figures 2a to 2d , Figures 4a to 4d , Figures 6a to 6d , Figures 8a to 8b As shown, the vertical cylinder frame 3 is an integral structure and is integrally molded together with the upper connecting frame 1 and the lower connecting frame 2. The height of this type of PIV flow field measurement test support frame 1000 for cooling fans is non-adjustable, resulting in a more stable overall structure. After completing the pre-test using the aforementioned height-adjustable PIV flow field measurement test support frame 1000 for cooling fans, the height dimensions of the PIV flow field measurement test support frame 1000 required for the formal test can be determined. However, the height dimensions of this type of non-adjustable PIV flow field measurement test support frame 1000 for cooling fans can be determined during the pre-test stage for application in the formal test. Alternatively, the dimensions of this type of non-adjustable PIV flow field measurement test support frame 1000 for cooling fans can be determined conservatively, and then, during the pre-test stage, different models of PIV flow field measurement test support frames 1000 for cooling fans can be used to determine the required dimensions for the formal test stage.

[0069] In some embodiments, such as Figures 1a to 2a and Figure 2dAs shown, when the air vent area of ​​the cooling fan 4 is located inside the vertical frame 3 on the vertical projection plane, the through holes 303 are distributed circumferentially on the upper frame 301, or the through holes 303 are distributed circumferentially on the upper frame 301 and circumferentially on the lower frame 302, or the through holes 303 are distributed circumferentially along the integral vertical frame 3. This ensures that the airflow at the air inlet of the cooling fan 4 is not interfered with.

[0070] In some embodiments, such as Figure 1a , Figure 1c , Figure 1e , Figures 2a to 2b and Figure 2d As shown, the upper connecting frame 1 is a horizontally arranged annular frame 102. The annular frame 102 is fixed to the upper outer periphery of the vertical cylindrical frame 3, and the vertical cylindrical frame 3 does not protrude upward from the annular frame 102. The upper surface of the annular frame 102 is used to support the annular position of the end face outside the fan hole area of ​​the horizontally arranged cooling fan 4, and correspondingly, the fan hole area of ​​the cooling fan 4 is located inside the vertical cylindrical frame 3 on the vertical projection plane. Multiple upper fixing holes 101 are evenly distributed along the circumference of the annular frame 102, and the multiple upper fixing holes 101 are located outside the vertical cylindrical frame 3 in the vertical projection direction. Therefore, the upper connecting frame 1 adopts a horizontally arranged annular frame 102, which is beneficial for more stable support and fixation of the horizontally arranged cooling fan 4, and will not affect the flow field at the air inlet of the cooling fan 4, thus ensuring the authenticity of the experiment.

[0071] In some embodiments, such as Figure 3a , Figure 3c , Figure 3d , Figure 4a , Figure 4b and Figure 4d As shown, the upper connecting frame 1 is a horizontally arranged flat plate 103. The upper surface of the flat plate 103 is used to support the end face of the horizontally arranged cooling fan 4 within the air vent area. Multiple upper fixing holes 101 are evenly distributed along the edge of the flat plate 103, and the multiple upper fixing holes 101 are located outside the vertical cylinder frame 3 in the vertical projection direction. Therefore, the use of a horizontally arranged flat plate 103 for the upper connecting frame 1 is beneficial for more stable support and fixation of the horizontally arranged cooling fan 4, and will not affect the flow field at the air inlet of the cooling fan 4, thus ensuring the authenticity of the experiment.

[0072] In some embodiments, such as Figure 5a , Figure 5c , Figure 5e , Figure 6a , Figure 6b and Figure 6dAs shown, the upper connecting frame 1 is a horizontally arranged first cantilever plate 104. The fixed end of the first cantilever plate 104 is fixed to the top of the vertical cylinder frame 3. The upper surface of the free end of the first cantilever plate 104 is used to support the end face of the horizontally arranged cooling fan 4 outside the fan blade area. Multiple upper fixing holes 101 are distributed at the free end of the first cantilever plate 104. When the upper surface of the free end of the first cantilever plate 104 is supported at the end face of the horizontally arranged cooling fan 4 outside the fan blade area, hot melt adhesive can be dripped into the multiple upper fixing holes 101 to horizontally fix the cooling fan 4 onto the first cantilever plate 104. In this way, the first cantilever plate 104 is located on one side of the cooling fan 4, which can ensure that the fan inlet is not affected and the flow field at the air inlet of the cooling fan 4 is not affected, thus ensuring the validity of the experiment.

[0073] In some embodiments, such as Figure 7a , Figure 7c , Figure 7e , Figure 8a and Figure 8b As shown, the upper connecting frame 1 is a vertically arranged second cantilever plate 105. The fixed end of the second cantilever plate 105 is fixed to the top of the vertical cylinder frame 3. One side surface of the free end of the second cantilever plate 105 is used to support the end face of the vertically arranged cooling fan 4 outside the fan blade area. Multiple upper fixing holes 101 are distributed at the free end of the second cantilever plate 105. When one side surface of the free end of the second cantilever plate 105 is supported at the end face of the vertically arranged cooling fan 4 outside the fan blade area, hot melt adhesive can be dripped into the multiple upper fixing holes 101 to vertically fix the cooling fan 4 onto the second cantilever plate 105. In this way, the second cantilever plate 105 is located on one side of the cooling fan 4, which can ensure that the fan inlet is not affected and the flow field at the air inlet of the cooling fan 4 is not affected, thus ensuring the validity of the experiment.

[0074] In some embodiments, such as Figure 1b , Figure 1d , Figure 1e , Figure 2a , Figure 2c , Figure 2d , Figure 3b , Figure 3d , Figure 4a , Figure 4c , Figure 4d , Figure 5b , Figure 5d , Figure 5e , Figure 6a , Figure 6c , Figure 6d , Figure 7b , Figure 8a and Figure 8bAs shown, the lower connecting frame 2 includes a horizontally arranged ring plate 201, which is fixed to the lower outer periphery of the vertical cylindrical frame 3. The ring plate 201 is fixedly connected to the test platform 5 or the base, which facilitates the stable fixing of the PIV flow field measurement test support frame 1000 for the cooling fan in this embodiment of the invention onto the test platform 5 or the base, thereby ensuring the stability of the cooling fan 4 during the PIV test.

[0075] In some embodiments, the ring plate 201 is provided with a plurality of lower fixing holes 202 along its circumferential direction. The plurality of lower fixing holes 202 are used to apply hot melt adhesive or to provide threaded fasteners, so as to fix the lower connecting frame 2 to the test platform 5 or the base. The ring plate 201 is reliably fixed to the test platform 5 or the base by dripping hot melt adhesive into the plurality of lower fixing holes 202 or by providing threaded fasteners such as bolts.

[0076] In some embodiments, the plurality of lower fixing holes 202 are evenly distributed along the circumferential spacing of the ring plate 201, which is beneficial for the PIV flow field measurement test support frame 1000 for the cooling fan of this utility model embodiment to be stably fixed on the test platform 5 or the base, thereby helping to ensure the stability of the cooling fan 4 in the PIV test.

[0077] It should be noted that, in the above different schemes, when the upper connecting frame 1 is a horizontally arranged plate 103, and the upper surface of the plate 103 is used to support the end face position corresponding to the fan hole area of ​​the horizontally arranged cooling fan 4 (e.g. Figure 3a , Figure 3c , Figure 3d , Figure 4a , Figure 4b and Figure 4d As shown, the cooling fan 4 can be either a centrifugal fan or an axial fan. In the other designs, the cooling fan 4 is a centrifugal fan.

[0078] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A PIV flow field measurement test support frame for a cooling fan, characterized in that, The components are made of aluminum alloy and include: The upper connecting frame is provided with a plurality of upper fixing holes. The upper connecting frame is used to support the end face position outside or inside the fan hole area of ​​the cooling fan and correspondingly, one end of the plurality of upper fixing holes abuts against the end face position of the cooling fan. Hot melt adhesive is used to be placed in the plurality of upper fixing holes to fix the cooling fan to the upper connecting frame. The lower connecting frame is used for detachable support and fixation on the test platform or base; A vertical frame, the upper end of which is fixed to the upper connecting frame, and the lower end of which is fixed to the lower connecting frame; when the fan hole area of ​​the cooling fan is located inside the vertical frame on the vertical projection plane, the peripheral wall of the vertical frame is provided with through holes.

2. The PIV flow field measurement test support frame for cooling fans according to claim 1, characterized in that, The vertical cylindrical frame includes an upper cylindrical frame and a lower cylindrical frame; the upper end of the upper cylindrical frame is fixed to the upper connecting frame, and the upper cylindrical frame and the upper connecting frame are integrally formed; the lower end of the lower cylindrical frame is fixed to the lower connecting frame, and the lower cylindrical frame and the lower connecting frame are integrally formed; the upper cylindrical frame and the lower cylindrical frame are threaded together and reinforced with thread-locking adhesive; or, the vertical cylindrical frame is an integral structure and is integrally formed with the upper connecting frame and the lower connecting frame.

3. The PIV flow field measurement test support frame for cooling fans according to claim 2, characterized in that, When the fan vent area of ​​the cooling fan is located inside the vertical cylinder frame on the vertical projection plane, the through holes are distributed circumferentially on the upper cylinder frame, or the through holes are distributed circumferentially on the upper cylinder frame and circumferentially on the lower cylinder frame, or the through holes are distributed circumferentially on the integral vertical cylinder frame.

4. The PIV flow field measurement test support frame for cooling fans according to claim 2, characterized in that, The upper connecting frame is a horizontally arranged annular frame. The annular frame is fixed to the upper outer periphery of the vertical cylindrical frame, and the vertical cylindrical frame does not protrude upward from the annular frame. The upper surface of the annular frame is used to support the annular position of the end face outside the fan hole area of ​​the horizontally arranged cooling fan, and correspondingly, the fan hole area of ​​the cooling fan is located inside the vertical cylindrical frame on the vertical projection plane. A plurality of upper fixing holes are evenly distributed along the circumference of the annular frame, and the plurality of upper fixing holes are located outside the vertical cylindrical frame in the vertical projection direction.

5. The PIV flow field measurement test support frame for cooling fans according to claim 2, characterized in that, The upper connecting frame is a horizontally arranged flat plate. The upper surface of the flat plate is used to support the end face position within the fan hole area of ​​the horizontally arranged cooling fan. A plurality of upper fixing holes are evenly distributed along the edge of the flat plate, and the plurality of upper fixing holes are located outside the vertical cylinder frame in the vertical projection direction.

6. The PIV flow field measurement test support frame for cooling fans according to claim 2, characterized in that, The upper connecting frame is a horizontally arranged first cantilever plate. The fixed end of the first cantilever plate is fixed to the top of the vertical cylinder frame. The upper surface of the free end of the first cantilever plate is used to support the end face of the horizontally arranged cooling fan outside the fan blade area. A plurality of upper fixing holes are distributed at the free end of the first cantilever plate.

7. The PIV flow field measurement test support frame for cooling fans according to claim 2, characterized in that, The upper connecting frame is a second cantilever plate arranged vertically. The fixed end of the second cantilever plate is fixed to the top of the vertical cylinder frame. One side surface of the free end of the second cantilever plate is used to support the end face of the vertically arranged cooling fan outside the fan blade area. Multiple upper fixing holes are distributed at the free end of the second cantilever plate.

8. The PIV flow field measurement test support frame for cooling fans according to any one of claims 1-7, characterized in that, The lower connecting frame includes a horizontally arranged ring plate, which is fixed to the lower outer periphery of the vertical cylinder frame.

9. The PIV flow field measurement test support frame for cooling fans according to claim 8, characterized in that, The ring plate is provided with a plurality of lower fixing holes along the circumferential direction. The plurality of lower fixing holes are used to provide hot melt adhesive or threaded parts so as to fix the lower connecting frame on the test platform or the base.

10. The PIV flow field measurement test support frame for a cooling fan according to claim 9, characterized in that, The plurality of lower fixing holes are evenly distributed at intervals along the circumference of the ring plate.

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