Centrifugal fan assembly fixtures and centrifugal fans

Abstract

This utility model provides a centrifugal fan assembly fixture and a centrifugal fan. The centrifugal fan assembly fixture includes a fixture base; a positioning slot located on the top of the fixture base for positioning and engaging with the fan bracket of the centrifugal fan to initially limit the Z-axis direction of the fan bracket to coincide with the axial direction of the positioning slot; a bracket limiting structure located on the top of the fixture base for limiting the engagement position of the fan bracket when assembled in the positioning slot; and multiple blade limiting blocks evenly spaced around the positioning slot on the top of the fixture base for limiting the axial direction of the centrifugal fan blades during assembly to be coaxial with the Z-axis direction of the fan bracket. The centrifugal fan assembly fixture provided by this utility model ensures the coaxiality of the centrifugal fan blades and the fan bracket during assembly, ensuring the performance and operational stability of the centrifugal fan. Operators no longer need to repeatedly rotate the fan or frequently bend over, simplifying the assembly operation and enabling rapid assembly of the centrifugal fan, thereby improving the assembly efficiency of direct-drive centrifugal fans.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology, and in particular to a centrifugal fan assembly fixture and a centrifugal fan. Background Technology

[0002] During the final assembly of direct-drive centrifugal fans, the traditional assembly method requires the fan to be flipped back and forth, and the operators usually need to bend over frequently. This makes the assembly operation of traditional direct-drive centrifugal fans cumbersome, difficult to position, and inefficient. At the same time, the traditional assembly method results in insufficient coaxiality accuracy between the centrifugal fan blades and the support frame, causing the centrifugal fan to make a clicking sound during operation, which affects the working performance and operational stability of the centrifugal fan. Utility Model Content

[0003] This utility model proposes a centrifugal fan assembly fixture and a refrigerator to solve the technical problem of insufficient coaxiality between the centrifugal fan blades and the fan support during the assembly of traditional direct-drive centrifugal fans.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a centrifugal fan assembly fixture, including:

[0006] Tooling base;

[0007] A positioning slot is located on the top of the tooling base and is used to position and engage with the fan bracket of the centrifugal fan to initially limit the Z-axis direction of the fan bracket to coincide with the axial direction of the positioning slot.

[0008] The bracket limiting structure is located on the top of the tooling base and is used to limit the mating position of the fan bracket when it is assembled into the positioning slot.

[0009] Multiple blade limiting blocks are evenly spaced around the positioning slots on the top of the tooling base to ensure that the axial direction of the centrifugal fan blades is coaxial with the Z-axis direction of the fan bracket during assembly.

[0010] Preferably, the wind turbine support includes:

[0011] The top surface of the bracket top plate is provided with a limiting protrusion that matches the positioning slot, and the bottom surface of the bracket top plate is provided with a connection structure for installing the drive motor of the centrifugal fan.

[0012] Several supporting columns, with their top ends evenly spaced and connected to the periphery of the support top plate, and their bottom ends extending in a direction away from the top surface of the support top plate.

[0013] The top plate of the bracket is installed upside down on the tooling base through the matching of the limiting protrusion and the positioning slot. The drive motor is assembled on the connecting structure, the centrifugal fan blade is assembled on the drive motor, and each blade of the centrifugal fan blade is matched with each fan blade limiting block.

[0014] Preferably, the bracket limiting structure includes:

[0015] Multiple linear drive mechanisms are evenly spaced around the positioning slots on the top of the tooling base. The linear drive mechanisms are used to drive the movable limit frame to reciprocate along the radial direction of the wind turbine support, moving closer to or further away from the wind turbine support. When the corresponding movable limit frame of each linear drive mechanism approaches and abuts against the support column at the same time, the displacement of the wind turbine support in the X and Y axis directions of the wind turbine support is restricted when it is assembled in the positioning slot.

[0016] Preferably, four support columns are evenly spaced and connected to the periphery of the top plate of the bracket, and four linear drive mechanisms are evenly spaced and arranged around the positioning slots on the top of the tooling base. The four linear drive mechanisms are used to drive the corresponding movable limit frame to reciprocate along the radial direction of the fan bracket towards or away from the four support columns.

[0017] Furthermore, the support limiting structure also includes:

[0018] Multiple locking devices are evenly spaced around the positioning slots on the top of the tooling base. The locking devices are used to limit the displacement of the fan bracket in the Z-axis direction when the fan bracket is assembled in the positioning slots.

[0019] Furthermore, the centrifugal fan assembly fixture also includes:

[0020] The counterweight is used to cooperate with each blade of the centrifugal fan when the centrifugal fan is assembled on the drive motor, so as to adjust the coaxiality of the centrifugal fan and the fan support.

[0021] Furthermore, the centrifugal fan assembly fixture also includes:

[0022] The pressure detection device is installed on the fan blade limit block and is used to detect the pressure value of the corresponding blade of the centrifugal fan.

[0023] Furthermore, the centrifugal fan assembly fixture also includes:

[0024] An electromagnet, mounted on a movable limit frame, is used to change the pressure value detected by the pressure detection device by altering the traction force it exerts on the corresponding blade of the centrifugal fan.

[0025] Furthermore, the centrifugal fan also includes:

[0026] The bracket base plate is installed at the bottom of each supporting column;

[0027] The guide ring is installed on the mounting hole in the middle of the bracket base plate.

[0028] This utility model also provides a centrifugal fan, which is assembled using the centrifugal fan assembly fixture described above.

[0029] Preferably, the centrifugal fan is a direct-drive centrifugal fan.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The centrifugal fan assembly fixture provided by this utility model ensures the coaxiality of the centrifugal fan blades and the fan bracket, preventing clicking noises during centrifugal fan operation and ensuring the performance and operational stability of the centrifugal fan. It is ergonomic, allowing operators to quickly assemble the centrifugal fan without having to flip the fan back and forth or bend over frequently, simplifying the assembly operation of direct-drive centrifugal fans and thus improving the assembly efficiency of direct-drive centrifugal fans. Attached Figure Description

[0032] To more clearly illustrate the technical solution proposed by this utility model, the present utility model will be described in detail below with reference to the embodiments and accompanying drawings. It should be understood that the embodiments and accompanying drawings described in the following detailed description are merely some embodiments of this utility model, and those skilled in the art can make changes to these drawings under the concept of this utility model.

[0033] Figure 1 A three-dimensional assembly structure diagram of an embodiment of the centrifugal fan assembly fixture provided by this utility model;

[0034] Figure 2 An exploded structural diagram of an embodiment of the centrifugal fan assembly fixture provided by this utility model;

[0035] Figure 3 A three-dimensional structural schematic diagram of an embodiment of the centrifugal fan provided by this utility model;

[0036] Figure 4 Exploded view of an embodiment of the centrifugal fan provided by this utility model Figure 1 ;

[0037] Figure 5 Exploded view of an embodiment of the centrifugal fan provided by this utility model Figure 2 ;

[0038] Figure 6 A cross-sectional structural schematic diagram of an embodiment of the centrifugal fan provided by this utility model;

[0039] Figure 7 A schematic diagram of step one of assembling a centrifugal fan using the centrifugal fan assembly tooling provided by this utility model;

[0040] Figure 8 A schematic diagram of step two of assembling a centrifugal fan using the centrifugal fan assembly fixture provided by this utility model;

[0041] Figure 9 A schematic diagram of step three of assembling a centrifugal fan using the centrifugal fan assembly tooling provided by this utility model;

[0042] Figure 10 A schematic diagram of step four of assembling a centrifugal fan using the centrifugal fan assembly fixture provided by this utility model;

[0043] Figure 11 A schematic diagram of step five of assembling a centrifugal fan using the centrifugal fan assembly fixture provided by this utility model.

[0044] The main markings in the attached figures are as follows:

[0045] 1. Tooling base; 11. Positioning slot; 12. Base support legs;

[0046] 2. Fan blade limiting block; 21. Blade limiting groove;

[0047] 3. Support top plate; 31. Limiting protrusion;

[0048] 4. Supporting columns;

[0049] 5. Linear drive mechanism; 51. Movable limit frame;

[0050] 6. Locking device; 61. Locking bracket; 62. Linkage mechanism; 63. Handle; 64. Pressure head;

[0051] 7. Counterweight;

[0052] 8. Bracket base plate; 81. Mounting holes;

[0053] 9. Airflow guide ring;

[0054] 10. Casters;

[0055] 20. Electric motor;

[0056] 30. Centrifugal fan blades. Detailed Implementation

[0057] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer, the following description is provided in conjunction with the appendix. Figure 1-11 The present invention will be further described in detail with reference to the embodiments.

[0058] Please refer to the following: Figure 1-11 The centrifugal fan assembly fixture provided by this utility model includes:

[0059] Tooling base 1; positioning slot 11, located on the top of tooling base 1, used to position and cooperate with the fan bracket of the centrifugal fan to initially limit the Z-axis direction of the fan bracket to coincide with the axial direction of the positioning slot 11; bracket limiting structure, located on the top of tooling base 1, used to limit the mating position of the fan bracket when it is assembled in the positioning slot 11; multiple blade limiting blocks 2, evenly spaced around the positioning slot 11 on the top of tooling base 1, used to limit the axial direction of the centrifugal fan blades 30 during assembly to be coaxial with the Z-axis direction of the fan bracket.

[0060] The centrifugal fan assembly fixture provided by this utility model can easily position the fan bracket through the positioning slot 11 on the working base, initially limiting the Z-axis direction of the fan bracket to coincide with the axial direction of the positioning slot 11; at the same time, the bracket limiting structure and multiple fan blade limiting blocks 2 on the top of the fixture base 1 limit the mating position of the fan bracket when it is assembled in the positioning slot 11, and limit the axial direction of the centrifugal fan blades 30 to be coaxial with the Z-axis direction of the fan bracket when they are assembled, ensuring the coaxiality accuracy of the centrifugal fan blades 30 and the fan bracket, so that the centrifugal fan avoids clicking noise during operation, thereby ensuring the working performance and operational stability of the centrifugal fan.

[0061] Meanwhile, the centrifugal fan assembly fixture provided by this utility model is ergonomic, allowing operators to quickly assemble the centrifugal fan without having to flip the fan back and forth or bend over frequently, thus simplifying the assembly operation of the direct-drive centrifugal fan and improving the assembly efficiency of the direct-drive centrifugal fan.

[0062] Please refer to the following: Figure 1-6 In one embodiment of the centrifugal fan assembly fixture provided by this utility model, the fan support includes:

[0063] The top surface of the support plate 3 is provided with a limiting protrusion 31 that matches the positioning slot 11, and the bottom surface of the support plate 3 is provided with a connection structure (not shown in the figure) for installing the drive motor 20 of the centrifugal fan; a plurality of support columns 4 are evenly spaced at the top of the support columns 4 and connected to the periphery of the support plate 3, and the bottom end of the support columns 4 extends away from the top surface of the support plate 3.

[0064] The bracket top plate 3 is installed upside down on the tooling base 1 through the limiting protrusion 31 and the positioning slot 11. The drive motor 20 is assembled on the connecting structure, the centrifugal fan blade 30 is assembled on the drive motor 20, and each blade of the centrifugal fan blade 30 is respectively matched with each fan blade limiting block 2.

[0065] In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the connection structure can be a detachable connection structure such as a connection groove, connection hole, or connection buckle provided on the bottom surface of the top plate 3 of the support.

[0066] In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, both the positioning slot 11 and the limiting protrusion 31 are circular.

[0067] Please refer to the following: Figure 1-2 In one embodiment of the centrifugal fan assembly fixture provided by this utility model, the bracket limiting structure includes:

[0068] Multiple linear drive mechanisms 5 are evenly spaced around the positioning slot 11 and disposed on the top of the tooling base 1. The linear drive mechanisms 5 are used to drive the movable limiting frame 51 to reciprocate along the radial direction of the wind turbine support, so as to limit the displacement of the wind turbine support in the X and Y axis directions when the corresponding movable limiting frame 51 of each linear drive mechanism 5 approaches and abuts against the support column 4.

[0069] Please refer to the following: Figure 1-6 In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, four support columns 4 are evenly spaced and connected to the periphery of the top plate 3 of the bracket, and four linear drive mechanisms 5 are evenly spaced and arranged around the positioning slot 11 on the top of the fixture base 1. The four linear drive mechanisms 5 are respectively used to drive the corresponding movable limit frame 51 to reciprocate along the radial direction of the fan bracket towards or away from the four support columns 4.

[0070] When the corresponding movable limit frames 51 of the four linear drive mechanisms 5 approach and abut against the four support columns 4 simultaneously, it can ensure that the displacement of the wind turbine bracket in the X-axis and Y-axis directions is limited when the wind turbine bracket is assembled in the positioning slot 11.

[0071] In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the linear drive mechanism 5 can be a synchronous pulley, gear rack, lead screw nut, cylinder, electric cylinder or hydraulic cylinder, etc.

[0072] In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the top of the fixture base 1 is provided with a slide rail or slide groove that matches the linear drive mechanism 5. The movable limit frame 51 is connected to the linear drive mechanism 5 and is installed in the slide rail or slide groove by a slider to guide the movement of the movable limit frame 51.

[0073] Please refer to the following: Figure 1-2 In one embodiment of the centrifugal fan assembly fixture provided by this utility model, the bracket limiting structure further includes:

[0074] Multiple locking devices 6 are evenly spaced around the positioning slot 11 and are disposed on the top of the tooling base 1. The locking devices 6 are used to limit the displacement of the fan bracket in the Z-axis direction when the fan bracket is assembled in the positioning slot 11.

[0075] Please refer to the following: Figure 1-2 In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, four locking devices 6 are evenly spaced around the positioning slot 11 and disposed on the top of the fixture base 1, so as to restrict the displacement of the fan bracket in the Z-axis direction of the fan bracket when it is assembled in the positioning slot 11 by the four locking devices 6 around the fan bracket.

[0076] Please refer to the following: Figure 1-2 In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the locking device 6 includes:

[0077] A locking bracket 61 is installed on the top of the tooling base 1 near the positioning slot 11; a linkage mechanism 62 is installed on the locking bracket 61; a handle 63 is installed on one end of the linkage mechanism 62; and a pressure head 64 is installed on the other end of the linkage mechanism 62.

[0078] When the operator presses the handle 63 down into the circular slot of the locking bracket 61, the pressure head 64 is driven to press the top plate 3 of the fan bracket. At this time, the handle 63 is at a negative angle and the fan bracket is locked. When the operator pulls the handle 63 up, it can be driven to disengage from the top plate 3 of the fan bracket to unlock the fan bracket.

[0079] In other embodiments of the centrifugal fan assembly fixture provided by this utility model (not shown in the figure), the locking device 6 can also be a linear drive device driven by a motor or cylinder to drive the locking member to move closer to or away from the top plate 3 of the bracket, so as to press or disengage the locking member against the top plate 3 of the bracket, thereby locking or unlocking the fan bracket.

[0080] Please refer to the following: Figure 1-2 In one embodiment of the centrifugal fan assembly fixture provided by this utility model, the centrifugal fan assembly fixture further includes:

[0081] The counterweight 7 is used to cooperate with each blade of the centrifugal fan 30 when the centrifugal fan 30 is assembled on the drive motor 20, so as to adjust the coaxiality of the centrifugal fan 30 and the fan support.

[0082] Please refer to the following: Figure 1-2 In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the centrifugal fan assembly fixture further includes:

[0083] A pressure detection device (not shown in the figure) is installed on the fan blade limiting block 2 and is used to detect the pressure value of the corresponding blade of the centrifugal fan blade 30.

[0084] In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the pressure detection device is a pressure sensor or a pressure gauge.

[0085] Please refer to the following: Figure 1-2 In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the centrifugal fan assembly fixture further includes:

[0086] An electromagnet (not shown in the figure), mounted on the movable limit frame 51, is used to adjust the traction force it exerts on the corresponding blades of the centrifugal fan 30 to correspond to the pressure value detected by the pressure detection device. Specifically, the electromagnet changes the current value or direction it supplies based on the pressure value fed back by the pressure detection device, thereby adjusting the traction force exerted by the electromagnet on the corresponding blades of the centrifugal fan 30. This is done by changing the current value or direction supplied to each electromagnet to adjust the pressure value detected by each pressure detection device until the pressure values ​​detected by each pressure detection device are equal, thus achieving coaxial assembly of the centrifugal fan 30 and the fan support.

[0087] Please refer to the following: Figure 1-2 In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, a positioning magnet (not shown in the figure) is provided on the top of the fixture base 1, and the fan blade limiting block 2 is positioned and installed on the top of the fixture base 1 by magnetic attraction with the positioning magnet.

[0088] Please refer to the following: Figure 1-2 In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the side of the fan blade limiting block 2 facing the positioning slot 11 is provided with a blade limiting groove 21 that matches the shape of the corresponding blade of the centrifugal fan blade 30.

[0089] Please refer to the following: Figure 1-6 In one embodiment of the centrifugal fan assembly fixture provided by this utility model, the centrifugal fan further includes:

[0090] The bracket base plate 8 is installed at the bottom of each supporting column 4;

[0091] The guide ring 9 is installed on the mounting hole 81 in the middle of the bracket base plate 8.

[0092] Please refer to the following: Figure 1-2 In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the centrifugal fan assembly fixture further includes:

[0093] Several casters 10 are installed at the bottom of the tooling base 1, so that the centrifugal fan assembly tooling can be pushed by the operators to the corresponding assembly position in the factory area or workshop as needed.

[0094] Please refer to the following: Figure 1-2 In a preferred embodiment of the centrifugal fan assembly fixture provided by this utility model, the centrifugal fan assembly fixture further includes:

[0095] Several base supports 12 are installed at the bottom of the tooling base 1. When the centrifugal fan assembly tool arrives at the assembly work area, the base supports 12 can be lowered to improve the overall stability of the centrifugal fan assembly tool. At the same time, the tooling base 1 can be adjusted up and down to a suitable height according to the assembly habits of the operators.

[0096] Please refer to the following: Figure 7-11 1. This utility model also provides a centrifugal fan, which is assembled using the above-mentioned centrifugal fan assembly fixture. The assembly sequence is as follows: S1, fixture base 1 – S2, mounting the bracket top plate 3 and support column 4 (e.g., ...) on the fixture base. Figure 7 (As shown) — Install the drive motor 20 on the top plate 3 of the bracket (as shown) Figure 8 (As shown) — Install the fan blade limiting block 2 on the tooling base 1 (as shown) Figure 9 (As shown) — Install centrifugal fan blades 30 and counterweights 7 on drive motor 20 (as shown) Figure 10 (As shown) — Install the bracket base plate 8 on the support column 4 (as shown) Figure 11 (As shown) — Install the guide ring (such as) on the bracket base plate 8. Figure 1 (As shown).

[0097] In a preferred embodiment of the centrifugal fan provided by this utility model, the centrifugal fan is a direct-drive centrifugal fan.

[0098] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Those skilled in the art should understand that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centrifugal fan assembly tool, characterized by, include: Tooling base (1); A positioning slot (11) is provided on the top of the tooling base (1) for positioning and cooperating with the fan bracket of the centrifugal fan to initially limit the Z-axis direction of the fan bracket to coincide with the axial direction of the positioning slot (11); The bracket limiting structure is located on the top of the tooling base (1) and is used to limit the mating position of the fan bracket when it is assembled in the positioning slot (11). Multiple blade limiting blocks (2) are evenly spaced around the positioning slot (11) on the top of the tooling base (1) to limit the axial direction of the centrifugal blades (30) of the centrifugal fan to be coaxial with the Z-axis direction of the fan bracket during assembly.

2. The centrifugal fan assembly tool of claim 1, wherein, The wind turbine support includes: The top surface of the bracket top plate (3) is provided with a limiting protrusion (31) that matches the positioning slot (11), and the bottom surface of the bracket top plate (3) is provided with a connection structure for installing the drive motor (20) of the centrifugal fan. A number of support columns (4) are provided, the top ends of which are evenly spaced and connected to the periphery of the bracket top plate (3), and the bottom ends of the support columns (4) extend away from the top surface of the bracket top plate (3). The bracket top plate (3) is installed upside down on the tooling base (1) through the limiting protrusion (31) and the positioning slot (11). The drive motor (20) is assembled on the connecting structure. The centrifugal fan (30) is assembled on the drive motor (20), and each blade of the centrifugal fan (30) is respectively matched with each of the fan blade limiting blocks (2).

3. The centrifugal fan assembly tool of claim 2, wherein, The bracket limiting structure includes: Multiple linear drive mechanisms (5) are evenly spaced around the positioning slot (11) and disposed on the top of the tooling base (1). The linear drive mechanism (5) is used to drive the movable limiting frame (51) to reciprocate along the radial direction of the wind turbine support, so as to limit the displacement of the wind turbine support in the X-axis and Y-axis directions when the corresponding movable limiting frame (51) of each linear drive mechanism (5) approaches and abuts against the support column (4) at the same time.

4. The centrifugal fan assembly tool of claim 3, wherein, The four support columns (4) are evenly spaced and connected to the periphery of the top plate (3) of the bracket. The four linear drive mechanisms (5) are evenly spaced and arranged around the positioning slot (11) on the top of the tooling base (1). The four linear drive mechanisms (5) are used to drive the corresponding movable limit frame (51) to reciprocate along the radial direction of the fan bracket towards or away from the four support columns (4).

5. The centrifugal fan assembly tool of claim 3, wherein, The bracket limiting structure also includes: Multiple locking devices (6) are evenly spaced around the positioning slot (11) and disposed on the top of the tooling base (1). The locking devices (6) are used to limit the displacement of the fan bracket in the Z-axis direction of the fan bracket when it is assembled in the positioning slot (11).

6. The centrifugal fan assembly fixture as described in any one of claims 3-5, characterized in that, Also includes: The counterweight (7) is used to cooperate with each blade of the centrifugal fan (30) when the centrifugal fan (30) is assembled on the drive motor (20) to adjust the coaxiality of the centrifugal fan (30) and the fan support.

7. The centrifugal fan assembly fixture as described in claim 6, characterized in that, Also includes: A pressure detection device is installed on the fan blade limiting block (2) to detect the pressure value of the corresponding blade of the centrifugal fan blade (30).

8. The centrifugal fan assembly fixture as described in claim 7, characterized in that, Also includes: An electromagnet, mounted on the movable limiting frame (51), is used to change the pressure value detected by the pressure detection device by changing the traction force acting on the corresponding blade of the centrifugal fan (30).

9. The centrifugal fan assembly fixture as described in any one of claims 2-5, characterized in that, The centrifugal fan also includes: The bracket base plate (8) is installed at the bottom end of each of the supporting columns (4); The guide ring (9) is installed on the mounting hole (81) in the middle of the bracket base plate (8).

10. A centrifugal fan, characterized in that, The centrifugal fan assembly fixture as described in any one of claims 1-8 was used for assembly.

11. The centrifugal fan as described in claim 10, characterized in that, The centrifugal fan is a direct-drive centrifugal fan.

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