Fresh air system centrifugal fan blade with positioning structure

Abstract

The utility model relates to the technical field of fresh air systems, in particular to a fresh air system centrifugal fan blade with a positioning structure and a balance correction device. A centrifugal fan blade comprises a fan blade body and a motor shell installed on the fan blade body, and a motor shaft is integrally formed in the motor shell. Positioning bosses are coaxially installed on the motor shaft in the motor shell, positioning grooves are formed in the positioning bosses, and the positioning bosses are evenly arranged around the motor shaft at intervals. In the balance correction process, the positioning protruding block is arranged on the top of the shaft sleeve in the balancing machine, after the fan blades are installed on the balancing machine, the positioning protruding block and the positioning groove are oppositely inserted and meshed, and the fan blades and the shaft sleeve in the balancing machine are radially limited through the positioning protruding block and the positioning groove; radial limiting processing is carried out between the fan blades and the shaft sleeve instead of an original chuck starting mode, the motor shaft does not need to be clamped by the shaft sleeve, the risk that the motor shaft is clamped can be prevented, and motor noise is not prone to being caused in the running process.

Description

Technical Field

[0001] The present application relates to the technical field of fresh air systems, and in particular to a centrifugal fan blade of a fresh air system with a positioning structure. Background Art

[0002] In air conditioning systems, dynamic balancing is often required to ensure smooth fan blade operation and reduce vibration and noise. Existing techniques often use bolts or welding to connect the outer rotor motor's blade body to the motor housing with the motor shaft. This presents the following drawbacks: 1) During balancing, the motor shaft must be clamped radially with a pneumatic chuck, which can easily cause shaft snagging and noise during operation; 2) The connection between the motor housing and the blade body is insufficiently strong, resulting in relative displacement at high speeds, affecting balancing accuracy.

[0003] Since the motor shaft is usually a smooth axis, during the actual calibration process, when the fan blades are clamped on the balancing machine to achieve radial anti-rotation, a pneumatic chuck needs to be made on the balancing machine, and this is achieved through the friction force between the motor shaft and the chuck.

[0004] However, the motor shaft is often scratched during the clamping process, resulting in motor noise during operation. Furthermore, the conventional connection method results in large coaxiality errors between the motor housing and the fan body, further exacerbating the vibration and noise issues. Therefore, further improvements are possible. Summary of the Invention

[0005] In order to prevent the risk of the motor shaft being pinched and to make it less likely to cause motor noise during operation, the present application provides a centrifugal fan blade for a fresh air system with a positioning structure.

[0006] The centrifugal fan blade of a fresh air system with a positioning structure provided in this application adopts the following technical solution:

[0007] A centrifugal fan blade for a fresh air system with a positioning structure includes a fan blade body and a motor housing mounted on the fan blade body, wherein a motor shaft is integrally formed in the motor housing; a positioning boss is mounted in the motor housing, the positioning boss is sleeved and mounted on the motor shaft and is coaxially arranged with the motor shaft; positioning grooves are provided on the positioning boss and are evenly spaced around the motor shaft.

[0008] By adopting the above technical solution, during the balancing correction process, a positioning protrusion is set on the top of the sleeve in the balancing machine. When the fan blade is installed on the balancing machine, the positioning protrusion and the positioning groove are engaged with each other, and the fan blade and the sleeve in the balancing machine are radially limited by the positioning protrusion and the positioning groove, thereby replacing the original starting chuck method to perform radial limiting processing between the fan blade and the sleeve. There is no need for the sleeve to clamp the motor shaft, which can prevent the risk of the motor shaft being clamped and make it less likely to cause motor noise during operation.

[0009] Optionally, through holes are provided on the motor housing, and the through holes are evenly arranged around the motor shaft; a connecting column is provided on the back side of the positioning boss, and the connecting column is connected to the fan blade body after passing through the through hole.

[0010] By adopting the above technical solution, the positioning boss, the motor housing and the fan blade body are connected into a whole by means of connecting columns to form a triangular connection relationship, which makes the structure more stable during the subsequent balancing correction process.

[0011] Optionally, a positioning base is provided at one end of the motor shaft connected to the motor housing, the positioning base is in a frustum shape, and the positioning boss is sleeved and clamped on the positioning base.

[0012] By adopting the above technical solution, a positioning base is provided for the positioning boss to be installed. Since the outer contour of the positioning base is larger, it can withstand a larger torque, thereby protecting the motor shaft and preventing it from being deformed.

[0013] Optionally, the number of the through holes is three, and they are evenly arranged around the motor shaft; the number of the connecting columns is three, and they are evenly spaced around the center of the positioning boss.

[0014] Optionally, a plurality of first plug-in blocks are formed on the inner side of the positioning boss around its circumference, and the plurality of first plug-in blocks are evenly spaced; a first slot is formed on the outer circumference of the positioning base, and the first plug-in blocks are inserted into the first slots one by one.

[0015] By adopting the above technical solution, the first plug block and the first slot are used to further improve the connection strength between the positioning boss and the positioning base, thereby ensuring the service life and quality during subsequent balance testing or formal use.

[0016] Optionally, a plurality of second plug-in blocks are formed on the outer peripheral surface of the motor housing around its circumference, and the plurality of second plug-in blocks are arranged at even intervals; a second slot is formed on the fan blade body, and the second plug-in blocks are plugged into the second slot one by one.

[0017] By adopting the above technical solution, the second plug and the second slot are used to further improve the connection strength between the motor housing and the fan blade body, thereby ensuring the service life and quality of use during subsequent balancing tests or formal use.

[0018] Optionally, the number of the second plug-in blocks is three.

[0019] Optionally, the total width of the second plug is 1 / 8 to 1 / 12 of the outer circumference of the motor housing.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. During the balancing process, a positioning bump is provided on the top of the shaft sleeve in the balancing machine. After the fan blade is installed in the balancing machine, the positioning bump and the positioning groove are engaged with each other. The fan blade and the shaft sleeve in the balancing machine are radially limited by the positioning bump and the positioning groove, replacing the original starting chuck method for radially limiting the fan blade and the shaft sleeve. There is no need for the shaft sleeve to clamp the motor shaft, which can prevent the risk of the motor shaft being pinched and make it less likely to cause motor noise during operation.

[0022] 2. The positioning boss, motor housing and fan body are connected into a whole by connecting columns to form a triangular connection relationship, which makes the structure more stable during the subsequent balancing correction process;

[0023] 3. The first insert and the first slot are used to further improve the connection strength between the positioning boss and the positioning base, thereby ensuring the service life and quality during subsequent balance testing or formal use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of Example 1 of the present application.

[0025] Figure 2 It is a structural schematic diagram of the motor housing part in Example 1 of the present application.

[0026] Figure 3 This is a schematic diagram of the mechanism of Example 1 of the present application after being assembled on a balancing machine.

[0027] Figure 4 yes Figure 3 exploded view.

[0028] Figure 5 It is a structural diagram of Example 2 of the present application.

[0029] Figure 6 yes Figure 5 Enlarged view of part A.

[0030] Figure 7yes Figure 5 Enlarged view of part B.

[0031] Description of reference numerals:

[0032] 1. Fan blade body; 11. Second slot; 2. Motor housing; 21. Through hole; 22. Second plug-in block; 3. Motor shaft; 4. Positioning boss; 41. Positioning groove; 42. First plug-in block; 5. Positioning base; 51. First slot; 100. Balancing machine; 101. Bushing; 102. Positioning boss. DETAILED DESCRIPTION

[0033] The following is a further detailed description of this application in conjunction with Figures 1-7.

[0034] An embodiment of the present application discloses a centrifugal fan blade for a fresh air system with a positioning structure.

[0035] Example 1:

[0036] Reference Figure 1 and Figure 2 A centrifugal fan blade for a fresh air system with a positioning structure includes a fan body 1 and a motor housing 2 integrally formed with a motor shaft 3; wherein the outer contour of the motor housing 2 is cylindrical, and a mounting opening is formed inside the fan body 1, and the motor housing 2 is embedded and fixedly installed in the mounting opening. A positioning boss 4 in the form of a circular ring plate is installed inside the motor housing 2. The positioning boss 4 is mounted on the motor shaft 3 and is coaxial with the motor shaft 3. A positioning groove 41 is formed on the positioning boss 4. In this embodiment, there are two positioning grooves 41, which are symmetrically arranged on both sides of the motor shaft 3 to be evenly spaced.

[0037] Referring to the figures, specifically, in this embodiment, the motor shaft 3 is connected to the motor housing 2 at one end and is integrally formed with a truncated cone-shaped positioning base 5. Correspondingly, a positioning hole that matches the positioning base 5 is provided in the middle of the positioning boss 4, so that the positioning boss 4 can be installed on the positioning base 5 through the positioning hole. A through hole 21 is provided on the motor housing 2, and the number of the through holes 21 is three, and the through holes 21 are evenly arranged around the motor shaft 3. Correspondingly, a connecting column is provided on the back side of the positioning boss 4, and the number of the connecting columns is three, and they are evenly spaced around the center of the positioning boss 4. The outer diameter of the connecting column is compatible with the through hole 21, and the three connecting columns are respectively passed through the three through holes 21 and connected to the fan blade body 1, so that the positioning boss 4, the motor housing 2 and the fan blade body 1 can form a whole.

[0038] On the one hand, by providing a positioning base 5 for mounting the positioning boss 4, due to its larger outer profile, the positioning base 5 can withstand greater torque, thereby protecting the motor shaft 3 and preventing it from deforming. On the other hand, by means of a connecting column, the positioning boss 4, the motor housing 2, and the fan body 1 are connected into a whole, forming a triangular connection relationship, which is more stable during the subsequent balancing and correction process.

[0039] The implementation principle is:

[0040] Reference Figure 1 、 3 4. During the balancing correction process, two positioning protrusions are symmetrically arranged on the top of the sleeve 101 in the balancing machine 100. After the fan blade is installed on the balancing machine 100, the positioning protrusions and the positioning grooves 41 are plugged and engaged. The fan blade and the sleeve 101 in the balancing machine 101 are radially limited by the positioning protrusions and the positioning grooves 41, replacing the original starting chuck method to perform radial limiting processing between the fan blade and the sleeve 101. There is no need for the sleeve 101 to clamp the motor shaft 3, which can prevent the risk of the motor shaft 3 being clamped, making it less likely to cause motor noise during operation.

[0041] Example 2:

[0042] The difference between this embodiment and the first embodiment lies in that the connections between the positioning boss 4 and the positioning base 5 and between the motor housing 2 and the fan body 1 are different.

[0043] Reference Figure 5 、 6 Specifically, in this embodiment, the inner side of the positioning boss 4 is formed with a plurality of first insert blocks 42 around its circumference, and the plurality of first insert blocks 42 are evenly spaced. Correspondingly, the outer circumference of the positioning base 5 is formed with first slots 51, and the plurality of first slots 51 are evenly spaced. The first insert blocks 42 are inserted into the first slots 51 in a one-to-one correspondence. Utilizing the first insert blocks 42 and the first slots 51, the connection strength between the positioning boss 4 and the positioning base 5 is further improved, thereby ensuring the service life and quality during subsequent balancing tests or formal use.

[0044] In this embodiment, the number of the first plug-in blocks 42 is three, and correspondingly, the number of the first slots 51 is also three. In other embodiments, the number of the first plug-in blocks 42 can be four, five, or the like.

[0045] Reference Figure 5 、 7Specifically, in this embodiment, multiple second insert blocks 22 are formed around the circumference of the motor housing 2, and the multiple second insert blocks 22 are evenly spaced. Correspondingly, the fan body 1 is formed with multiple second slots 11, and the multiple second slots 11 are evenly spaced. The second insert blocks 22 are inserted into the second slots 11 in a one-to-one correspondence. The second insert blocks 22 and the second slots 11 further improve the connection strength between the motor housing 2 and the fan body 1, thereby ensuring the service life and quality during subsequent balancing tests or formal use.

[0046] In this embodiment, there are three second insert blocks 22, and correspondingly, there are also three second slots 11. In other embodiments, the number of first insert blocks 42 may be four, five, or the like. The total width of the second insert blocks 22 is 1 / 8 to 1 / 12 of the outer circumference of the motor housing 2. Preferably, the total width of the second insert blocks 22 is 1 / 10 of the outer circumference of the motor housing 2.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A centrifugal fan blade for a fresh air system with a positioning structure, characterized by: The invention comprises a fan blade body (1) and a motor housing (2) mounted on the fan blade body (1), wherein a motor shaft (3) is integrally formed in the motor housing (2); a positioning boss (4) is mounted in the motor housing (2), the positioning boss (4) is sleeved and mounted on the motor shaft (3), and is coaxially arranged with the motor shaft (3); positioning grooves (41) are provided on the positioning boss (4), and are evenly spaced around the motor shaft (3); a positioning base (5) is provided at one end of the motor shaft (3) connected to the motor housing (2), the positioning base (5) is in the shape of a truncated cone, the positioning boss (4) is sleeved and clamped on the positioning base (5), and the inner side of the positioning boss (4) is formed with a plurality of circumferential grooves. A first plug-in block (42) is formed on the outer peripheral surface of the positioning base (5), and a plurality of the first plug-in blocks (42) are arranged at even intervals; a first slot (51) is formed on the outer peripheral surface of the positioning base (5), and the first plug-in blocks (42) are plugged into the first slot (51) one by one; a plurality of second plug-in blocks (22) are formed on the outer peripheral surface of the motor housing (2) around the circumference thereof, and the plurality of the second plug-in blocks (22) are arranged at even intervals; a second slot (11) is formed on the fan blade body (1), and the second plug-in blocks (22) are plugged into the second slot (11) one by one; the number of the second plug-in blocks (22) is three, and the total width of the second plug-in blocks (22) is 1 / 8 to 1 / 12 of the outer perimeter of the motor housing (2).

2. A centrifugal fan blade with a positioning structure for a fresh air system according to claim 1, characterized in that: The motor housing (2) is provided with through holes (21), and the through holes (21) are evenly arranged around the motor shaft (3); a connecting column is provided on the back side of the positioning boss (4), and the connecting column passes through the through holes (21) and is connected to the fan blade body (1).

3. A centrifugal fan blade with a positioning structure for a fresh air system according to claim 2, characterized in that: The number of the through holes (21) is three and they are evenly arranged around the motor shaft (3); the number of the connecting columns is three and they are evenly spaced around the center of the positioning boss (4).

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