Mounting chassis for fan blades of asynchronous motor fan

Abstract

The utility model relates to an industrial fan, in particular to an industrial fan driven by an asynchronous motor. A mounting base plate for fan blades of an asynchronous motor is a cone-frustum-shaped workpiece, the interior of the mounting base plate is a cavity, the top of the mounting base plate is a closing-in position, and the diameter of the closing-in position is gradually reduced from bottom to top; fan blade installation grooves are evenly distributed in the circumferential face of the outer surface of the installation base plate, and the appearance size of the fan blade installation grooves is correspondingly matched with the appearance of an inserting piece connected with the installation base plate. The installation chassis is light in weight and safe and reliable in connection.

Description

Technical Field

[0001] The utility model relates to an industrial fan, in particular to an industrial fan driven by an asynchronous motor. Background Art

[0002] Industrial fans have a large weight due to their large dimensions. The length of their blades can reach more than three meters. Therefore, in order to reduce weight and inertia, people use cavity blades to reduce weight. However, since the motor needs to have a certain weight, the weight reduction of cavity blades alone is insufficient. On the other hand, it needs to have a considerable installation reliability to ensure safety. In this regard, it is mainly necessary to consider the connection between the blades and the mounting chassis, and the connection between the asynchronous motor output shaft and the mounting chassis. Summary of the invention

[0003] The utility model aims to solve the above defects of the prior art and provides a mounting chassis for asynchronous motor fan blades. The mounting chassis of the utility model is light in weight and has safe and reliable connection.

[0004] The utility model discloses a mounting chassis for asynchronous motor fan blades, which is a truncated cone-shaped workpiece, with a cavity inside and a closing part at the top, the diameter of which gradually decreases from bottom to top; the outer circumferential surface of the mounting chassis is evenly distributed with fan blade mounting grooves, and the outer dimensions of the fan blade mounting grooves correspond to the outer dimensions of the fan blade plug-in.

[0005] The installation chassis of the asynchronous motor fan blades has an odd number of blade installation slots.

[0006] The installation chassis of the asynchronous motor fan blades has a cavity dug on the installation chassis body between the blade installation grooves.

[0007] The described chassis for mounting fan blades of an asynchronous motor has a clearance fit between the fan blade mounting groove and the fan blade plug-in.

[0008] The fan blade mounting chassis of the utility model is hollow inside, and the mounting body between the fan blade mounting grooves is hollowed out, which greatly reduces the weight of the workpiece, thereby reducing the overall weight of the fan. The fan blade mounting groove imitates the appearance design of the blade plug-in, thereby limiting the freedom of movement of the fan blade plug-in and ensuring the safety of the fan blade connection. The output shaft of the asynchronous motor is inserted from the top of the mounting chassis, and the tapered hole set in the mounting chassis can firmly hold the output shaft of the asynchronous motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below in conjunction with the accompanying drawings:

[0010] Figure 1 It is a three-dimensional diagram of the utility model;

[0011] Figure 2 It is the front view of the utility model;

[0012] Figure 3 yes Figure 2 Middle AA section;

[0013] Figure 4 A top view of the utility model. DETAILED DESCRIPTION

[0014] See also Figure 1-Figure 4 The utility model discloses a mounting chassis for fan blades of an asynchronous motor, which is a truncated cone-shaped workpiece, with a cavity 2 inside (without affecting the structural strength) and a closing portion 3 at the top, the diameter of which gradually decreases from bottom to top; blade mounting grooves 4 are evenly distributed on the circumferential surface of the mounting chassis, and the number of the blade mounting grooves is determined according to the actual number of blades, and the outer dimensions of the blade mounting grooves correspond to the outer shape of a plug-in used to connect the blades to the mounting chassis.

[0015] In the installation chassis of the asynchronous motor fan blade, the number of the blade installation slots 4 is greater than or equal to three.

[0016] The installation chassis of the fan blades of the asynchronous motor is provided with a cavity 5 on the installation chassis body 1 between the blade installation grooves.

[0017] In the installation chassis of the asynchronous motor fan blade, there is a clearance fit between the blade installation groove 4 and the blade plug-in.

[0018] The fan blade insert is fixed by bolts in the corresponding contoured fan blade mounting slot on the asynchronous motor mounting chassis, which directly constrains the rotational freedom around the rotating axis.

Claims

1. A mounting chassis for an asynchronous motor fan blade, which is a truncated cone-shaped workpiece, characterized in that: The interior of the fan blade installation plate is a cavity, and the top is a closed part, the diameter of which gradually decreases from bottom to top; the outer circumferential surface of the mounting chassis is evenly distributed with fan blade mounting grooves, and the outer dimensions of the fan blade mounting grooves correspond to the outer dimensions of the fan blade plug-in.

2. The mounting chassis of an asynchronous motor fan blade according to claim 1, characterized in that: The number of the fan blade mounting slots is greater than or equal to three.

3. The mounting chassis of an asynchronous motor fan blade according to claim 1, characterized in that: A cavity is dug on the installation chassis body between the fan blade installation grooves.

4. The mounting chassis for the fan blades of an asynchronous motor according to claim 1, characterized in that: There is a clearance fit between the fan blade installation groove and the fan blade plug-in unit.

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