Installation gap control device for air duct and impeller of axial flow fan

Abstract

An installation gap control device for an air duct and an impeller of an axial flow fan comprises a supporting bottom plate, a supporting base fixedly connected to the supporting bottom plate and a plurality of positioning claws evenly distributed outside the supporting base in the circumferential direction, and the upper portions of the positioning claws are positioning parts. During installation, a motor of the axial flow fan is placed on the supporting base, an impeller is connected to a rotor of the motor, an air duct of the axial flow fan is pre-tightened through a first bolt and a mesh enclosure and then pre-tightened through a second bolt to be connected to the motor, and at the moment, the position of the impeller is rotated and adjusted, so that the axial flow fan is installed. When the axial flow fan is installed, the positioning part is tightly attached to the blades of the impeller and the air cylinder, the first bolt and the second bolt are locked, and the axial flow fan is installed; by means of the device, manual intervention on blade top gaps can be reduced or eliminated in the installation process of the axial flow fan, the blade top gaps can be more uniform, and impeller efficiency reduction caused by installation is reduced.

Description

Technical Field

[0001] The utility model relates to a device for controlling the installation gap between a wind tube and an impeller of an axial flow fan. Background Art

[0002] Axial fans are often used in low-pressure, high-air-volume situations, such as heat dissipation in air-conditioning systems and ventilation in industrial buildings, and have become an indispensable part of our production and life. The blade tip clearance of axial flow fans is an important factor affecting axial flow fans. At present, the installation and control of the blade tip clearance of axial flow fans are all controlled by manually measuring the clearance of each blade, and then manually adjusting the position of the wind tube to control the blade tip clearance. This solution will greatly increase the adjustment time as the number of blades of the axial flow fan increases, and will bring about human errors, resulting in a decrease in the operating efficiency of the axial flow fan, poor product consistency, and even uneven clearances that may cause friction between the impeller blades and the wind tube, causing accidents.

[0003] The disadvantages of the existing assembly method are mainly manifested in the following aspects: 1. The installation and control of the blade tip clearance of axial flow fans all rely on manual measurement of the clearance of each blade, and then the blade tip clearance is controlled by manually adjusting the position of the wind tube. It is difficult to ensure the accuracy of the clearance, resulting in reduced fan operating efficiency; 2. Pure manual adjustment of the blade tip clearance has large human errors, and uneven clearances may occur, resulting in accidents caused by friction between the impeller and the wind tube; 3. The installation and control of the blade tip clearance of axial flow fans all rely on manual measurement of the clearance of each blade, which wastes a lot of time and labor costs. Summary of the invention

[0004] In view of the shortcomings existing in the above problems, the utility model provides a device for controlling the installation gap between the wind tube and the impeller of an axial flow fan.

[0005] To achieve the above-mentioned purpose, the utility model provides an installation gap control device for a wind tube and an impeller of an axial flow fan, comprising a support base, a support seat fixedly connected to the support base, and a plurality of positioning claws uniformly distributed circumferentially outside the support seat, wherein the upper portion of the positioning claw is a positioning portion;

[0006] During installation, the motor of the axial flow fan is placed on the support seat, the rotor of the motor is connected to an impeller, the air cylinder of the axial flow fan is pre-tightened with a first bolt and a mesh cover, and then pre-tightened and connected to the motor by a second bolt. At this time, the position of the impeller is rotated and adjusted so that the positioning portion and the blades of the impeller and the air cylinder are kept in close contact, the first bolt and the second bolt are locked, and the installation of the axial flow fan is completed.

[0007] Furthermore, a bubble level is provided on the supporting base plate.

[0008] Furthermore, a reinforcement ring is provided on the outer side of the support seat, and the support seat, the positioning claw and the reinforcement ring are connected by welding to form a whole.

[0009] Furthermore, the outer surface of the positioning portion has a wear-resistant layer, and the wear-resistant layer is a plastic layer formed on the outer surface of the positioning portion by injection molding.

[0010] Furthermore, the motor is an outer rotor motor, a positioning boss is provided on the mounting plane of the motor, and a positioning groove matching the positioning boss is formed on the hub of the impeller.

[0011] Furthermore, there are two positioning bosses, and the angle formed between the two positioning bosses and the axis of the motor is fifty degrees.

[0012] The beneficial effects of the utility model compared with the prior art are:

[0013] 1. This device can reduce or eliminate manual intervention in the blade tip clearance during the installation of the axial flow fan, making the blade tip clearance more uniform and reducing the reduction in impeller efficiency caused by installation;

[0014] 2. This device does not need to measure the gap between each blade for manual adjustment, especially for impellers with a large number of blades. It can significantly improve the impeller installation efficiency and save labor costs.

[0015] 3. This device can prevent accidents caused by friction between the impeller and the wind tube due to uneven impeller gap;

[0016] 4. The device makes the blade tip clearance uniform, reduces the operating efficiency reduction caused by assembly, improves manufacturing efficiency, saves labor costs, and ensures the consistency of axial flow fans when leaving the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a mounting gap control device for a wind cylinder and an impeller of an axial flow fan involved;

[0018] Figure 2 is a schematic diagram of the axial flow fan involved;

[0019] Figure 3 The exploded diagram of the axial fan involved;

[0020] Figure 4 is a schematic diagram of the motor involved;

[0021] Figure 5 A schematic diagram of the axial flow fan involved in the assembly of the device (part of the wind cylinder is hidden).

[0022] In the figure: 1, supporting base plate; 2, supporting seat; 3, positioning claw; 31, positioning part; 4, reinforcing ring; 5, axial flow fan; 51, mesh cover; 52, motor; 521, positioning boss; 53, impeller; 531, blade; 532, positioning groove; 54, air cylinder; 55, first bolt; 56, second bolt. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, a device for controlling the installation gap between the air duct and the impeller of an axial flow fan of the utility model embodiment comprises a supporting base plate 1, a supporting seat 2 fixedly connected to the supporting base plate 1, and five positioning claws 3 uniformly distributed in a circumference outside the supporting seat 2, and the upper part of the positioning claws 3 is a positioning portion 31; during installation, the motor 52 of the axial flow fan 5 is placed on the supporting seat 2, and the rotor of the motor 52 is connected with an impeller 53 (a locking cover is provided on the outer side of the impeller 53, and the connecting bolts pass through the locking cover and the impeller 53 in sequence and are locked on the rotor of the motor 52), and the air duct 54 of the axial flow fan 5 is pre-tightened by the first bolt 55 and the mesh cover 51, and then pre-tightened and connected to the motor 52 by the second bolt 56. At this time, the installer enters the gap between the air duct 54 and the supporting base plate 1 by hand or with the help of a tool to rotate and adjust the position of the impeller 53, so that the positioning portion 31 and the blades 531 of the impeller 53 and the air duct 54 are kept in a close contact state ( Figure 5 As shown), tighten the first bolt 55 and the second bolt 56, and the axial flow fan 5 is installed;

[0024] In addition, a bubble level is provided on the support base plate 1 to ensure that the support base plate 1 is laid flat; a reinforcement ring 4 is provided on the outer side of the support seat 2, and the support seat 2, the positioning claw 3 and the reinforcement ring 4 are connected by welding to form a whole to strengthen the structure; the outer surface of the positioning portion 31 has a wear-resistant layer, which is a plastic layer, formed on the outer surface of the positioning portion 31 by injection molding, and the use of highly wear-resistant materials can avoid material wear and ensure the service life of the device; the motor 52 is an outer rotor motor, and a positioning boss 521 is provided on the mounting plane of the motor 52, and a positioning groove 532 matching the positioning boss 521 is formed on the hub of the impeller 53; there are two positioning bosses 521, and the angle formed between the two positioning bosses 521 and the axis of the motor 52 is fifty degrees. A fool-proof design is adopted to ensure the accuracy of assembly between the motor and the impeller.

[0025] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for controlling the installation gap between the fan cylinder and the impeller of an axial flow fan, characterized in that: It comprises a supporting base plate (1), a supporting seat (2) fixedly connected to the supporting base plate (1), and a plurality of positioning claws (3) evenly distributed in a circumference outside the supporting seat (2), wherein the upper portion of the positioning claws (3) is a positioning portion (31); The support seat (2) is used to place the motor (52) of the axial flow fan (5); the rotor of the motor (52) is connected to an impeller (53); the air cylinder (54) of the axial flow fan (5) is pre-tightened and connected to the mesh cover (51) by a first bolt (55); the mesh cover (51) is pre-tightened and connected to the motor (52) by a second bolt (56); during the rotation adjustment process of the impeller (53), the positioning portion (31) can maintain a close contact state with the blades (531) of the impeller (53) and the air cylinder (54).

2. The installation gap control device for the wind tube and the impeller of an axial flow fan according to claim 1, characterized in that: A bubble level is provided on the supporting base plate (1).

3. The installation gap control device for the wind tube and the impeller of an axial flow fan according to claim 1, characterized in that: A reinforcement ring (4) is provided on the outer side of the support seat (2), and the support seat (2), the positioning claw (3) and the reinforcement ring (4) are connected by welding to form a whole.

4. The installation gap control device for the wind tube and the impeller of an axial flow fan according to claim 1, characterized in that: The outer surface of the positioning portion (31) has a wear-resistant layer, which is a plastic layer formed on the outer surface of the positioning portion (31) by injection molding.

5. The installation gap control device for the wind tube and the impeller of an axial flow fan according to claim 1, characterized in that: The motor (52) is an outer rotor motor, a positioning boss (521) is provided on the mounting plane of the motor (52), and a positioning groove (532) matching the positioning boss (521) is formed on the hub of the impeller (53).

6. The installation gap control device for the wind tube and the impeller of an axial flow fan according to claim 5, characterized in that: There are two positioning bosses (521), and the angle formed between the two positioning bosses (521) and the axis of the motor (52) is fifty degrees.

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