Square regulating door in centrifugal fan and its manufacturing process

Abstract

The invention discloses a square regulating door in a centrifugal fan and a manufacturing process thereof, and the manufacturing process thereof comprises the following steps: S1, making a box body: S11, preparing a plate raw material; S12, using a cutting machine to cut the plate raw material to obtain a first blank; S13, using a punching machine to punch holes on the first blank to form perforations; S14, using a bending machine to bend the first blank to obtain a first side plate and a second side plate; S15, assembling the two first side plates and the second side plates into a box body; S2, installing a ball bearing: S21, installing a bearing seat on the first side plate; S22, installing a ball bearing on the bearing seat. The square regulating door in a centrifugal fan and a manufacturing process thereof solve the problem in the prior art that it is unknown how to ensure the concentricity of the two perforations on the outer shell through which the rotating shaft of the regulating door passes.

Description

Technical Field

[0001] The invention discloses a fan regulating door, and in particular relates to a square regulating door in a centrifugal fan and a manufacturing process thereof. Background Art

[0002] Using regulating doors in centrifugal fans to adjust the air flow is a necessary equipment in certain applications.

[0003] A Chinese patent discloses a fan slip guide vane regulating door device with application number CN201020294031.X, which includes a shell, guide vanes installed on a plurality of regulating door rotating shafts in the shell, both ends of the regulating door rotating shafts are installed on bearing seats outside the shell, the regulating door rotating shafts outside the shell are divided into two groups, one group is movably connected by a main linkage frame, and the other group is movably connected by an auxiliary linkage frame, the slip linkage handle at one end of the main linkage frame is connected to the auxiliary linkage handle at one end of the auxiliary linkage frame via the slip linkage frame, and the other end of the active handle connected to the main linkage frame is connected to the pull rod of the adjustment part.

[0004] Although the fan slip guide vane regulating door device can adjust the air flow rate, the fan slip guide vane regulating door device still has the following disadvantages: how to produce the fan slip guide vane regulating door device, especially the two through holes on the shell for the regulating door rotating shaft to pass through, the concentricity of the two through holes is the basic condition for the smooth rotation of the regulating door rotating shaft, so how to ensure the concentricity of the two through holes during the production process is an urgent problem to be solved. Summary of the invention

[0005] The present invention provides a square regulating door in a centrifugal fan and a manufacturing process thereof, so as to solve the problem in the prior art that it is unknown how to ensure the concentricity of two through holes on a housing through which a rotating shaft of the regulating door passes.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention firstly discloses a square regulating door in a centrifugal fan, comprising: a box body, a first rotating shaft, a second rotating shaft, blades, a transmission handle rod, a linkage rod, a driving arm and a rotation driving mechanism, wherein the first rotating shaft is installed on one side of the box body, and the second rotating shaft is installed on the other side of the box body, the first rotating shaft and the second rotating shaft are fixed to two ends of the blade, the first rotating shaft is fixed to the transmission handle rod, the transmission handle rod is hinged to the linkage rod, and there are at least two groups of the first rotating shaft, the second rotating shaft, the blades and the transmission handle rod; the linkage rod is hinged to one end of the driving arm, and the other end of the driving arm is fixed to the output end of the rotation driving mechanism.

[0008] Preferably, the box body includes: a first side panel and a second side panel, both of which are U-shaped structures, there are two first side panels and two second side panels, the two second side panels are installed between the two first side panels, the first side panel is perpendicular to the second side panel, the corners where the first side panel and the second side panel are connected are connected by a triangular plate, one first side panel is for the first rotating shaft to pass through, and the other first side panel is for the second rotating shaft to pass through.

[0009] Preferably, a bearing seat is installed on the first side plate, the first rotating shaft passes through the bearing seat, and a ball bearing is installed on the bearing seat, the first rotating shaft passes through the ball bearing.

[0010] The present invention also discloses a manufacturing process of a square regulating door in a centrifugal fan, comprising the following steps:

[0011] S1, making a box body: S11, preparing a plate material; S12, using a cutting machine to cut the plate material to obtain a first blank; S13, using a punching machine to punch holes in the first blank to form perforations; S14, using a bending machine to bend the first blank to obtain a first side panel and a second side panel; S15, assembling the two first side panels and the second side panels into a box body;

[0012] S2. Install the ball bearing: S21. Install the bearing seat on the first side plate; S22. Install the ball bearing on the bearing seat.

[0013] Preferably, S15 includes the following steps:

[0014] S151, setting an assembly platform, the assembly platform is a rectangular parallelepiped structure, and the assembly platform matches the first side plate and the second side plate to form an inner hole size;

[0015] S152, pressing the first side plate and the second side plate tightly around the assembly platform;

[0016] S153, positioning the first side plate and the second side plate using a stopper sleeve and a standard mandrel;

[0017] S154, using a triangular plate to connect the ends of the first side plate and the second side plate.

[0018] Preferably, S153 includes the following steps:

[0019] S1531, pressing the mounting flange onto the two first side plates;

[0020] S1532, inserting the stopper sleeve into the mounting flange, the first side plate and the assembly platform;

[0021] S1533. Pass the standard mandrel through two pairs of stop sleeves, the mounting flange, the first side plate and the assembly platform, on which a through hole is provided.

[0022] Preferably, a mounting seat is installed in the assembly platform, a moving block is installed on the mounting seat, the moving block can move radially in the through hole relative to the mounting seat, a spring is installed between the moving block and the mounting seat, and under the spring force, the moving block can extend into the through hole to block the standard core shaft from passing through.

[0023] Preferably, after step S2 is executed, the following is executed: S3, installing the bearing.

[0024] Preferably, S3 comprises the following steps:

[0025] S31, installing the bearing seat on the first side plate;

[0026] S32, inserting the stop sleeve into the bearing seat, the first side plate and the assembly platform;

[0027] S33, inserting the standard mandrel into the stopper sleeve, the bearing seat, the first side plate and the assembly platform;

[0028] S34, welding the bearing seat to the first side plate;

[0029] S35, install the ball bearing on the bearing seat, and the ball bearing is sleeved outside the standard core shaft;

[0030] S36, riveting the ball bearing onto the bearing seat;

[0031] S37. Remove the stop sleeve and standard mandrel.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] Since the box body of the square adjusting door in the centrifugal fan in the present application is made of two first side panels and two second side panels, a stop sleeve and a standard core shaft are used to position the two first side panels, so as to ensure the concentricity of the perforations on the two first side panels and ensure that after the two first rotating shafts are subsequently installed, the first rotating shafts and the blades can rotate smoothly relative to the box body.

[0034] 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

[0035] Figure 1 This is a schematic diagram of the structure of a square regulating door in a centrifugal fan.

[0036] Figure 2 This is a schematic diagram of the structure of a square regulating door in a centrifugal fan.

[0037] Figure 3 It is a schematic diagram of the structure of the box on the assembly platform.

[0038] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0039] Figure 5 A schematic diagram of the structure of the stopper sleeve and the moving block.

[0040] Figure 6 for Figure 3 Schematic diagram of the structure after the assembly platform is disassembled.

[0041] Figure markings: box body 1, first side panel 11, second side panel 12, bearing seat 13, ball bearing 14, mounting seat 151, moving block 152, spring 153, first circular arc surface 154, first rotating shaft 2, second rotating shaft 3, blade 4, transmission handle rod 5, linkage rod 6, driving arm 7, assembly platform 8, mounting flange 9, stop sleeve 10, second circular arc surface 100, standard core shaft 101. DETAILED DESCRIPTION

[0042] 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:

[0043] Embodiment 1:

[0044] like Figure 1 as well as Figure 2 As shown, this embodiment discloses a square regulating door in a centrifugal fan, comprising: a box body 1, a first rotating shaft 2, a second rotating shaft 3, blades 4, a transmission handle rod 5, a linkage rod 6, a driving arm 7 and a rotation drive mechanism (not shown in the figure), the first rotating shaft 2 is installed on one side of the box body 1, and the second rotating shaft 3 is installed on the other side of the box body 1, the first rotating shaft 2 and the second rotating shaft 3 are fixed to both ends of the blade 4, the first rotating shaft 2 is fixed to the transmission handle rod 5, the transmission handle rod 5 is hinged to the linkage rod 6, and the first rotating shaft 2, the second rotating shaft 3, the blade 4 and the transmission handle rod 5 are at least two groups; the linkage rod 6 is hinged to one end of the driving arm 7, and the other end of the driving arm 7 is fixed to the output end of the rotation drive mechanism.

[0045] The box body 1 includes: a first side panel 11 and a second side panel 12, both of which are U-shaped structures, and there are two first side panels 11 and two second side panels 12, and the two second side panels 12 are installed between the two first side panels 11, the first side panel 11 is perpendicular to the second side panel 12, and the corners where the first side panels 11 and the second side panels 12 are connected are connected by a triangular plate, and one first side panel 11 is passed through by the first rotating shaft 2, and the other first side panel 11 is passed through by the second rotating shaft 3. The two first side panels 11 clamp the second side panel 12 in the middle, thereby realizing the positioning of the two first side panels 11 and the two second side panels 12, and maintaining the state of surrounding the box body 1.

[0046] A bearing seat 13 is mounted on the first side plate 11 , and the first rotating shaft 2 passes through the bearing seat 13 . A ball bearing 14 is mounted on the bearing seat 13 , and the first rotating shaft 2 passes through the ball bearing 14 .

[0047] Embodiment 2:

[0048] like Figures 3 to 6 As shown, this embodiment discloses a manufacturing process for a square regulating door in a centrifugal fan for producing the square regulating door in the centrifugal fan, comprising the following steps:

[0049] S1, making box body 1: S11, preparing plate raw materials; S12, using a cutting machine to cut the plate raw materials to obtain a first blank; S13, using a punching machine to punch holes in the first blank to form perforations; S14, using a bending machine to bend the first blank to obtain a first side panel 11 and a second side panel 12; S15, assembling the two first side panels 11 and the second side panels 12 into the box body 1;

[0050] S2, installing the ball bearing 14: S21, installing the bearing seat 13 on the first side plate 11; S22, installing the ball bearing 14 on the bearing seat 13.

[0051] S15 includes the following steps:

[0052] S151, setting an assembly platform 8, the assembly platform 8 is a rectangular parallelepiped structure, and the assembly platform 8 matches the first side plate and the second side plate 12 to form an inner hole size;

[0053] S152, pressing the first side plate 11 and the second side plate 12 tightly around the assembly platform 8;

[0054] S153, using the stopper sleeve 10 and the standard mandrel 101 to position the first side plate 11 and the second side plate 12;

[0055] S154, using a triangular plate to connect the ends of the first side plate 11 and the second side plate 12.

[0056] S153 includes the following steps:

[0057] S1531, pressing the mounting flange 9 onto the two first side plates 11;

[0058] S1532, inserting the stopper sleeve 10 into the mounting flange 9, the first side plate 11 and the assembly platform 8, the stopper sleeve 10 presses the moving block 152 away from the through hole;

[0059] S1533, pass the standard core shaft 101 through two pairs of stop sleeves 10, the mounting flange 9, the first side plate 11 and the assembly platform 8, and the assembly platform 8 is provided with a through hole.

[0060] A mounting seat 151 is installed in the assembly platform 8, and a moving block 152 is installed on the mounting seat 151. The moving block 152 can move in the radial direction of the through hole relative to the mounting seat 151. A spring 153 is installed between the moving block 152 and the mounting seat 151. Under the elastic force of the spring 153, the moving block 152 can extend into the through hole to block the standard core shaft 101 from passing through.

[0061] A first arc surface 154 is provided on the moving block 152 , and a second arc surface 100 is provided on the end of the stop sleeve 10 . The second arc surface 100 is used to squeeze the first arc surface 154 away from the through hole.

[0062] After step S2 is executed, the following steps are executed: S3, installing the bearing.

[0063] S3 includes the following steps:

[0064] S31, installing the bearing seat 13 on the first side plate 11;

[0065] S32, inserting the stopper sleeve 10 into the bearing seat 13, the first side plate 11 and the assembly platform 8;

[0066] S33, inserting the standard mandrel 101 into the stopper sleeve 10, the bearing seat 13, the first side plate 11 and the assembly platform 8;

[0067] S34, welding the bearing seat 13 to the first side plate 11;

[0068] S35, installing the ball bearing 14 on the bearing seat 13, and the ball bearing 14 is sleeved outside the standard core shaft 101;

[0069] S36, riveting the ball bearing 14 onto the bearing seat 13;

[0070] S37, remove the stop sleeve 10 and the standard mandrel 101.

[0071] In the present application, firstly, in order to position the first side plate 11 and the second side plate 12, an assembly platform 8 is provided to position the positions of the two first side plates 11 and the second side plates 12; then, in order to position the first side plate 11 and the second side plate 12 and ensure that the through holes on the two first side plates 11 are aligned, that is, to ensure the concentricity of the two first side plates 11, a stop sleeve 10 and a standard mandrel 101 are provided to pass through the through holes on the two first side plates 11 and the through holes on the assembly platform 8, and also to position the mounting flange 9 on the first side plate 11; then, since the two first side plates 11 are positioned by passing through the standard mandrel 101, a moving block 152 and a spring 151 are provided. 153 and the mounting seat 151, when the mounting seat 151 is installed in the assembly platform 8, the moving block 152 and the spring 153 can be installed, and under the elastic force of the spring 153, the moving block 152 is kept in a state of blocking the stop sleeve 10 from extending into the assembly platform 8. Therefore, the stop sleeve 10 needs to be inserted first before the standard core shaft 101 can be penetrated, so as to avoid forgetting to install the stop sleeve 10 and positioning the two first side panels 11, which causes the perforations on the two first side panels 11 to be unable to be concentric; finally, a triangular block is set to connect the first side panel 11 with the end of the second side panel 12, locate the relative position of the first side panel 11 and the second side panel 12, and improve the accuracy of installing the box body 1.

[0072] 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. The manufacturing process of the square regulating door in the centrifugal fan is characterized by: The steps include: S1, making a box body: S11, preparing a plate material; S12, using a cutting machine to cut the plate material to obtain a first blank; S13, using a punching machine to punch holes in the first blank to form perforations; S14, using a bending machine to bend the first blank to obtain a first side panel and a second side panel; S15, assembling the two first side panels and the second side panels into a box body; S2, installing the ball bearing: S21, installing the bearing seat on the first side plate; S22, installing the ball bearing on the bearing seat; S15 includes the following steps: S151, setting an assembly platform, the assembly platform is a rectangular parallelepiped structure, and the assembly platform matches the first side plate and the second side plate to form an inner hole size; S152, pressing the first side plate and the second side plate tightly around the assembly platform; S153, positioning the first side plate and the second side plate using a stopper sleeve and a standard mandrel; S154, connecting the ends of the first side plate and the second side plate using a triangular plate; S153 includes the following steps: S1531, pressing the mounting flange onto the two first side plates; S1532, inserting the stopper sleeve into the mounting flange, the first side plate and the assembly platform; S1533, passing the standard mandrel through two pairs of stop sleeves, the mounting flange, the first side plate and the assembly platform, wherein a through hole is provided on the assembly platform; A mounting seat is installed in the assembly platform, and a moving block is installed on the mounting seat. The moving block can move radially in the through hole relative to the mounting seat. A spring is installed between the moving block and the mounting seat. Under the elastic force of the spring, the moving block can extend into the through hole to block the standard core shaft from passing through.

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