Manufacturing Process of Inlet Chamber with Stopper Ring in a Centrifugal Fan

Abstract

The present invention discloses a manufacturing process for an air inlet chamber with a spigot ring in a centrifugal fan. The air inlet chamber with a spigot ring in the centrifugal fan includes: an air inlet chamber body, a spigot ring, a rectifying ring, a retaining ring, and a flange. A spigot ring is installed on the outer wall of the small end of the air inlet chamber body. The manufacturing process for the air inlet chamber with a spigot ring in the centrifugal fan includes the following steps: S1. Prepare the spigot ring, the air inlet chamber body, the flange, the rectifying ring, and the retaining ring. Among them, the rectifying ring and the retaining ring are riveted. The spigot ring includes at least three arc-shaped strips, and all the arc-shaped strips enclose the spigot ring. S2. Install the flange on the large end of the air inlet chamber body. S3. Install the spigot ring on the small end of the air inlet chamber body. S4. Install the rectifying ring and the retaining ring on the outer wall of the middle part of the air inlet chamber body. S5. Perform turning work. This manufacturing process for the air inlet chamber with a spigot ring in the centrifugal fan solves the problem in the prior art that it is impossible to realize how to install the spigot ring on the front disc.

Description

Technical Field

[0001] The invention relates to the field of manufacturing centrifugal fan parts, and in particular to a manufacturing process for an air inlet chamber with a stop ring in a centrifugal fan. Background Art

[0002] A Chinese patent discloses an impeller suitable for a 6-39 series high-efficiency centrifugal fan with an application number of CN202123411227.X. The impeller comprises a front disc, blades welded to the front disc and a middle disc welded to the blades. The middle disc is divided into a toothed middle disc and a hub disc. The hub disc is arranged inside the toothed middle disc. A front disc stop ring for optimizing the outlet airflow field is provided on one side of the front disc, and a straightening ring is designed at one end of the front disc stop ring.

[0003] Although a stop ring is provided in the impeller of the high-efficiency centrifugal fan, the impeller of the high-efficiency centrifugal fan still has the disadvantages that it is impossible to realize how to install the stop ring on the front disk, and it is even more impossible to ensure the concentricity of the stop ring and the front disk. Summary of the invention

[0004] The present invention provides a manufacturing process for an air inlet chamber with a stop ring in a centrifugal fan, so as to solve the problem in the prior art that the stop ring cannot be installed on a front disk.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention discloses a manufacturing process of an air inlet chamber with a stop ring in a centrifugal fan, wherein the air inlet chamber with a stop ring in the centrifugal fan comprises: an air inlet chamber body, a stop ring, a rectifying ring, a retaining ring and a flange plate, the air inlet chamber body is a trumpet-shaped structure, a stop ring is installed on the outer wall of the small end of the air inlet chamber body, a rectifying ring is installed on the outer wall of the middle part of the air inlet chamber body, the rectifying ring is blocked by the retaining ring on the side close to the stop ring, and a flange plate is installed on the outer wall of the large end of the air inlet chamber body; the manufacturing process of an air inlet chamber with a stop ring in a centrifugal fan comprises the following steps: S1, preparing the stop ring, the air inlet chamber body, the flange plate, A straightening ring and a retaining ring, wherein the straightening ring and the retaining ring are riveted, and the stop ring comprises: at least three arc-shaped bars, all of which form a stop ring, and the arc-shaped bars are connected by a first supporting rib and a second supporting rib; S2, installing a flange at the large end of the air inlet chamber body; S3, installing the stop ring on the small end of the air inlet chamber body; S4, installing the straightening ring and the retaining ring on the middle outer wall of the air inlet chamber body; S5, performing turning work: turning the outer diameter of the stop ring to a specified diameter C, and turning the end face of the small end of the air inlet chamber body and the end face of the stop ring, so that the height of the air inlet chamber body is a specified value A.

[0007] Preferably, there are four arc-shaped bars, and the ends of two oppositely arranged arc-shaped bars are connected by a first supporting rib; one end of one of the two adjacent arc-shaped bars is connected to one end of the first supporting rib, and one end of the other arc-shaped bar is connected to one end of the second supporting rib, and the other end of the second supporting rib is fixed to the middle part of the first supporting rib, and the end of the second supporting rib and the end of the first supporting rib are surrounded outside the gap between the two adjacent arc-shaped bars.

[0008] Preferably, step S3 comprises the following steps:

[0009] S31, placing the air inlet chamber body on a working platform, with the large end of the air inlet chamber body being located below the small end of the air inlet chamber body;

[0010] S32, the arc-shaped bar with the first supporting rib and the second supporting rib is placed on the small end of the air inlet chamber body, and the first supporting rib is supported by the end surface of the small end of the air inlet chamber body;

[0011] S33, using a measuring tool to measure the position of the outer wall of the arc strip, and adjusting the position of the arc strip according to the measurement result so that the arc strip is concentric with the air inlet chamber body;

[0012] S34, riveting the arc strip to the outer wall of the small end of the air inlet chamber body to form a stop ring.

[0013] Preferably, the measuring tool comprises: a right-angle triangle and a ruler, and the measuring steps of the measuring tool are as follows:

[0014] S331. Place the right angle side of the right triangle ruler close to the side wall of the flange;

[0015] S332, using a ruler to measure the distance d between the outer wall of the arc strip and the right angle side of the right angle triangle;

[0016] S333, measuring eight measurement positions on the outer periphery of the flange, repeating steps S331 and S332 at each measurement position, to obtain eight d;

[0017] S334, determine whether the eight d are within the error range. If so, determine that the stop ring is concentric with the air inlet chamber body; if not, determine that the stop ring is not concentric with the air inlet chamber body, and the corresponding measurement position where d exceeds the error range needs to adjust the position of the arc strip.

[0018] Preferably, the measuring tool includes: a mounting base, a mounting shell, a first infrared sensor, a second infrared sensor, a third infrared sensor, a fourth infrared sensor, a controller and a display screen, the mounting base is mounted on the two first connecting ribs, a rotatable mounting shell is mounted on the mounting base, the first infrared sensor, the second infrared sensor, the third infrared sensor and the fourth infrared sensor are mounted on the mounting shell in opposite directions, the third infrared sensor and the fourth infrared sensor are located above the first infrared sensor and the second infrared sensor, the first infrared sensor is used to detect the distance d1 from one side of the inner wall of the air inlet chamber body to the mounting shell, and the first infrared sensor is used to detect the distance d2 from one side of the inner wall of the air inlet chamber body to the mounting shell; the top surface of the stop sleeve is higher than the position of the small end surface of the air inlet chamber body, and the top end of the stop sleeve emerges from the air inlet chamber body to form a top edge, the third infrared sensor is used to detect the distance d3 from the top edge to the mounting shell, and the first infrared sensor is used to detect the distance d4 from the top edge to the mounting shell.

[0019] Preferably, the measuring steps of the measuring tool are as follows:

[0020] S301, installing the mounting seat at the connection between two first connecting ribs;

[0021] S302, adjusting the first infrared sensor, the second infrared sensor, the third infrared sensor and the fourth infrared sensor to align with N different measurement positions, N≥4, and obtaining a set of d1, d2, d3 and d4 at each measurement position;

[0022] S303, calculate the difference K between d1 and d2 in each group i , 1≤i≤N, K i =|d1-d2|;

[0023] S304, calculate average value

[0024] S305, determine which of d3 and d4 in each group is larger, and assign the larger one to x max , the smaller one is assigned to x min ;

[0025] S306, calculate the difference Δx, Δx=x max -x min ;

[0026] S307, determine Δx range, J is the set value; if so, it is judged that the difference between d3 and d4 in the corresponding group is within the error range, and the stop ring is concentric with the air inlet chamber body; if not, it is judged that the difference between d3 and d4 in the corresponding group is not within the error range, the stop ring is not concentric with the air inlet chamber body, and the position of the stop ring relative to the air inlet chamber body needs to be adjusted.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In the present application, a first connecting rib and a second connecting rib are welded at the stop ring, so that when the stop ring is installed, the stop ring can be stably supported by the air inlet chamber body through the first connecting rib and the second connecting rib. This makes it convenient to use detection tools to detect the position of the stop ring later, and to adjust the stop ring to a position concentric with the air inlet chamber body, thereby ensuring the installation position of the stop ring on the air inlet chamber body and the quality of the stop ring after installation.

[0029] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a cross-sectional view of the air inlet chamber body in the present invention.

[0031] Figure 2 It is a top view of the stop ring of the present invention.

[0032] Figure 3 This is a schematic diagram of the structure for measuring the concentricity of the stop ring of the right-angle set square in Example 1.

[0033] Figure 4 This is a schematic diagram of the structure after the rectifier ring and retaining ring are installed on the air inlet chamber body.

[0034] Figure 5 This is a schematic diagram of the structure of the measuring tool and the air inlet chamber body in Example 2.

[0035] Figure 6 for Figure 5 Schematic diagram of the structure of the stop ring and the measuring tool.

[0036] Figure 7 for Figure 5 Schematic diagram of the structure at the measuring tool.

[0037] Figure numerals: air inlet chamber body 1, stop ring 2, first supporting rib 21, second supporting rib 22, arc strip 23, rectifying ring 3, retaining ring 4, flange 5, right-angled triangle 6, mounting seat 71, mounting shell 72, first infrared sensor 73, screw 74, third infrared sensor 75, fourth infrared sensor 76. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0039] Embodiment 1:

[0040] like Figures 1 to 4 As shown, the present invention discloses a manufacturing process of an air inlet chamber with a stop ring 2 in a centrifugal fan, wherein the air inlet chamber with a stop ring 2 in the centrifugal fan comprises: an air inlet chamber body 1, a stop ring 2, a rectifying ring 3, a retaining ring 4 and a flange 5, the air inlet chamber body 1 is a trumpet-shaped structure, a stop ring 2 is installed on the outer wall of the small end of the air inlet chamber body 1, a rectifying ring 3 is installed on the outer wall of the middle part of the air inlet chamber body 1, the rectifying ring 3 is blocked by the retaining ring 4 on the side close to the stop ring 2, and a flange 5 is installed on the outer wall of the large end of the air inlet chamber body 1; the manufacturing process of an air inlet chamber with a stop ring 2 in a centrifugal fan comprises the following steps: S1, prepare the stop ring 2, the air inlet chamber body 1, the flange 5, the rectifying ring 3, the retaining ring 4 and the flange 5. Ring 3 and retaining ring 4, wherein the rectifying ring 3 and the retaining ring 4 are riveted, and the stop ring 2 includes: at least three arc-shaped strips 23, all the arc-shaped strips 23 surround the stop ring 2, and the arc-shaped strips 23 are connected by the first supporting rib 21 and the second supporting rib 22; S2, installing the flange 5 on the large end of the air inlet chamber body 1; S3, installing the stop ring 2 on the small end of the air inlet chamber body 1; S4, installing the rectifying ring 3 and the retaining ring 4 on the middle outer wall of the air inlet chamber body 1; S5, performing turning work: turning the outer diameter of the stop ring 2 to the specified diameter C, turning the end face of the small end of the air inlet chamber body 1 and the end face of the stop ring 2, so that the height of the air inlet chamber body 1 is the specified value A.

[0041] Preferably, there are four arc-shaped bars 23, and the ends of two oppositely arranged arc-shaped bars 23 are connected by a first supporting rib 21; one end of one arc-shaped bar 23 of two adjacent arc-shaped bars 23 is connected to one end of the first supporting rib 21, and one end of the other arc-shaped bar 23 is connected to one end of the second supporting rib 22, and the other end of the second supporting rib 22 is fixed to the middle part of the first supporting rib 21, and the end of the second supporting rib 22 and the end of the first supporting rib 21 are surrounded outside the gap between the two adjacent arc-shaped bars 23.

[0042] Step S3 includes the following steps:

[0043] S31, placing the air inlet chamber body 1 on a working platform, with the large end of the air inlet chamber body 1 located below the small end of the air inlet chamber body 1;

[0044] S32, the arc-shaped bar 23 with the first supporting rib 21 and the second supporting rib 22 is placed on the small end of the air inlet chamber body 1, and the first supporting rib 21 is supported by the end surface of the small end of the air inlet chamber body 1;

[0045] S33, using a measuring tool to measure the position of the outer wall of the arc strip 23, and adjusting the position of the arc strip 23 according to the measurement result so that the arc strip 23 is concentric with the air inlet chamber body 1;

[0046] S34, riveting the arc strip 23 to the outer wall of the small end of the air inlet chamber body 1 to form a stop ring 2.

[0047] The measuring tools include: a right-angle triangle 6 and a ruler. The measuring steps of the measuring tools are as follows:

[0048] S331, place the right angle side of the right angle set square 6 close to the side wall of the flange 5;

[0049] S332, using a ruler to measure the distance d between the outer wall of the arc strip 23 and the right angle side of the right angle triangle ruler 6;

[0050] S333, measuring eight measurement positions on the periphery of the flange 5, repeating steps S331 and S332 at each measurement position to obtain eight d;

[0051] S334, determine whether the eight d are within the error range. If so, determine that the stop ring 2 is concentric with the air inlet chamber body 1; if not, determine that the stop ring 2 is not concentric with the air inlet chamber body 1, and the corresponding measurement position where d exceeds the error range requires adjustment of the position of the arc strip 23.

[0052] Embodiment 2:

[0053] Compared with Embodiment 1, this embodiment only has a different measuring tool, and other structures are the same.

[0054] like Figures 5 to 7 As shown, the measuring tool includes: a mounting base 71, a mounting shell 72, a first infrared sensor 73, a second infrared sensor, a third infrared sensor 75, a fourth infrared sensor 76, a controller and a display screen. The mounting base 71 is mounted on two first connecting ribs, a rotatable mounting shell 72 is mounted on the mounting base 71, and the first infrared sensor 73, the second infrared sensor, the third infrared sensor 75 and the fourth infrared sensor 76 are mounted on the mounting shell 72 in opposite directions. The third infrared sensor 75 and the fourth infrared sensor 76 are located at the first Above the infrared sensor 73 and the second infrared sensor, the first infrared sensor 73 is used to detect the distance d1 from the inner wall side of the air inlet chamber body 1 to the mounting shell 72, and the first infrared sensor 73 is used to detect the distance d2 from the inner wall side of the air inlet chamber body 1 to the mounting shell 72; the top surface of the stop sleeve is higher than the position of the small end surface of the air inlet chamber body 1, and the top end of the stop sleeve emerges from the air inlet chamber body 1 to form a top edge, the third infrared sensor 75 is used to detect the distance d3 from the top edge to the mounting shell 72, and the first infrared sensor 73 is used to detect the distance d4 from the top edge to the mounting shell 72.

[0055] The measurement steps of the measuring tool are as follows:

[0056] S301, installing the mounting seat 71 at the connection between the two first connecting ribs;

[0057] S302, adjusting the first infrared sensor 73, the second infrared sensor, the third infrared sensor 75 and the fourth infrared sensor 76 to align with N different measurement positions, N≥4, and obtaining a set of d1, d2, d3 and d4 at each measurement position;

[0058] S303, calculate the difference K between d1 and d2 in each group i , 1≤i≤N, K i =|d1-d2|;

[0059] S304, calculate average value

[0060] S305, determine which of d3 and d4 in each group is larger, and assign the larger one to x max , the smaller one is assigned to x min ;

[0061] S306, calculate the difference Δx, Δx=x max -x min ;

[0062] S307, determine Δx range, J is the set value; if so, it is judged that the difference between d3 and d4 in the corresponding group is within the error range, and the stop ring is concentric with the air inlet chamber body; if not, it is judged that the difference between d3 and d4 in the corresponding group is not within the error range, the stop ring is not concentric with the air inlet chamber body, and the position of the stop ring relative to the air inlet chamber body needs to be adjusted.

[0063] When welding the first connecting rib and the second connecting rib, it cannot be guaranteed that the connection point of the first connecting rib and the second connecting rib is the center of the stop ring 2, and it is also not convenient to install the mounting base 71 at the center position of the stop ring 2. It cannot be guaranteed that when the mounting base 71 is installed, the axis of the mounting shell 72 relative to the mounting base 71 is on the axis of the air inlet chamber body 1. In order to improve the detection accuracy, the present application uses the detection results of the first infrared sensor 73 and the second infrared sensor to correct the detection results of the third infrared sensor 75 and the fourth infrared sensor 76, so that the judgment result is more accurate. At the same time, the first connecting rib and the second connecting rib can also be used to achieve installation, and it can be installed at will, which not only improves the detection accuracy, but also brings convenience to the installation of the mounting base 71.

[0064] The mounting seat 71 is provided with a slot for inserting the first connecting rib and the second connecting rib, and the mounting seat 71 is threadedly connected with a screw 74, which is pressed against the first connecting rib and the second connecting rib. The first connecting rib and the second connecting rib are thin, and the top edge of the stop ring 2 is relatively high, so as not to block the third infrared sensor 75 and the fourth infrared sensor 76.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A manufacturing process for an air inlet chamber with a stop ring in a centrifugal fan. It is characterized in that The air inlet chamber with a stop ring in the centrifugal fan comprises: an air inlet chamber body, a stop ring, a rectifying ring, a retaining ring and a flange. The air inlet chamber body is a trumpet-shaped structure. A stop ring is installed on the outer wall of the small end of the air inlet chamber body. A rectifying ring is installed on the outer wall of the middle part of the air inlet chamber body. The rectifying ring is blocked by the retaining ring on one side close to the stop ring. The flange is installed on the outer wall of the large end of the air inlet chamber body. The manufacturing process of the air inlet chamber with a stop ring in a centrifugal fan comprises the following steps: S1. Prepare a stop ring, an air inlet chamber body, a flange, a rectifier ring and a retaining ring, wherein the rectifier ring and the retaining ring are riveted together, and the stop ring includes: at least three arc-shaped bars, all of which form a stop ring, and the arc-shaped bars are connected by first supporting ribs and second supporting ribs; S2. Install a flange on the large end of the air inlet chamber body; S3. Install the stop ring on the small end of the air inlet chamber body; S4. Install the rectifier ring and the retaining ring on the outer wall of the middle part of the air inlet chamber body; S5, performing turning work: turning the outer diameter of the stop ring to a specified diameter C, and turning the end face of the small end of the air inlet chamber body and the end face of the stop ring so that the height of the air inlet chamber body is a specified value A; There are four arc-shaped bars, and the ends of two arc-shaped bars arranged opposite to each other are connected by a first supporting rib; one end of one arc-shaped bar among two adjacent arc-shaped bars is connected to one end of the first supporting rib, and one end of the other arc-shaped bar is connected to one end of the second supporting rib, and the other end of the second supporting rib is fixed to the middle part of the first supporting rib, and the end of the second supporting rib and the end of the first supporting rib are surrounded outside the gap between the two adjacent arc-shaped bars; Step S3 includes the following steps: S31, placing the air inlet chamber body on a working platform, with the large end of the air inlet chamber body being located below the small end of the air inlet chamber body; S32, the arc-shaped bar with the first supporting rib and the second supporting rib is placed on the small end of the air inlet chamber body, and the first supporting rib is supported by the end surface of the small end of the air inlet chamber body; S33, using a measuring tool to measure the position of the outer wall of the arc strip, and adjusting the position of the arc strip according to the measurement result so that the arc strip is concentric with the air inlet chamber body; S34, riveting the arc strip to the outer wall of the small end of the air inlet chamber body to form a stop ring.

2. According to the manufacturing process of the air inlet chamber with stop ring in the centrifugal fan of claim 1, It is characterized in that The measuring tools include: right-angle triangle and ruler. The measuring steps of the measuring tools are as follows: S331. Place the right angle side of the right triangle ruler close to the side wall of the flange; S332, using a ruler to measure the distance d between the outer wall of the arc strip and the right angle side of the right angle triangle; S333, measuring eight measurement positions on the outer periphery of the flange, repeating steps S331 and S332 at each measurement position, to obtain eight d; S334, determine whether the eight d are within the error range. If so, determine that the stop ring is concentric with the air inlet chamber body; if not, determine that the stop ring is not concentric with the air inlet chamber body, and the corresponding measurement position where d exceeds the error range needs to adjust the position of the arc strip.

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