Device for testing axial force of fan

Abstract

The utility model relates to a device for testing the axial force of a fan, which comprises a fan body, an impeller motor drives a main shaft distributed along the front-back direction to rotate, and an impeller is arranged in a fan rear shell close to the front end on the main shaft; the front end of the main shaft and a second bearing on the fan front seat are installed together, a first bearing is installed on the fan front seat on the outer side of the bearing seat, a sensor is installed on a sensor installation plate at the front end of the first bearing, and the sensor makes contact with the first bearing at the rear end. According to the utility model, real-time and dynamic monitoring of the axial force of the impeller is realized, and the accuracy of design verification is improved. The device is simple in structural design, convenient to install and suitable for rapid verification in the research and development stage.

Description

Technical Field

[0001] The utility model relates to the technical field related to mechanical equipment, and in particular to a device for testing the axial force of a fan. Background Art

[0002] Centrifugal blowers are gas conveying equipment widely used in industrial fields such as petroleum, chemical industry, metallurgy, and electric power. Their performance directly affects production efficiency and equipment safety.

[0003] After extensive searching, I discovered Chinese patent publication number CN216199269U, which discloses a bearing cooling system for an air compressor and an air compressor. The system comprises a cooling space within the air compressor, an air inlet duct and an air outlet duct respectively communicating with the cooling space, and an external air source sequentially passing through the air inlet duct, the cooling space, and the air outlet duct. This utility model provides a rationally arranged cooling space and cools the air compressor via the external air source.

[0004] During high-speed operation, the axial force generated by the impeller can significantly impact the stability of the equipment and its bearing system. Existing design verification relies primarily on static testing and theoretical calculations, which fail to fully reflect the axial force variations under dynamic conditions and lack effective comparison and verification with simulation values. This leads to potential errors in impeller design and bearing preload selection, impacting the equipment's operational stability and service life.

[0005] In addition, if external monitoring equipment is selected, its structure is complex and costly, and it is unable to monitor the dynamic changes of the axial force in real time.

[0006] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a device for testing the axial force of the fan, making it more valuable for industrial use. Utility Model Content

[0007] In order to solve any of the above technical problems, the purpose of the present invention is to provide a device for testing the axial force of a fan.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A device for testing the axial force of a fan comprises a fan body, a fan rear housing mounted at the rear end of the fan body, a fan front seat mounted at the front end of the fan body, an impeller motor, an impeller and a main shaft mounted in the fan rear housing, the impeller motor driving the main shaft distributed along the front-to-back direction to rotate, and an impeller mounted in the fan rear housing near the front end of the main shaft;

[0010] The front end of the main shaft is installed together with the second bearing on the front seat of the fan, a bearing seat is installed on the front seat of the fan at the front end of the second bearing, a first bearing is installed on the front seat of the fan outside the bearing seat, and a sensor is installed on the sensor mounting plate at the front end of the first bearing. The sensor is in contact with the first bearing at the rear end.

[0011] As a further improvement of the present invention, the sensor mounting plate is mounted together with the fan front seat at the rear end through a plurality of connecting rods.

[0012] As a further improvement of the present invention, a sensor contact block is installed in the first bearing, and the sensor contacts the sensor contact block at the rear end.

[0013] As a further improvement of the present invention, the first bearing is a linear bearing, and the second bearing is a rotary bearing.

[0014] As a further improvement of the present invention, the sensor is a strain gauge sensor or a pressure sensor.

[0015] By means of the above solution, the present invention has at least the following advantages:

[0016] The utility model realizes real-time and dynamic monitoring of the impeller axial force, thereby improving the accuracy of design verification.

[0017] The device of the utility model has a simple structural design and is easy to install, and is suitable for rapid verification in the research and development stage.

[0018] The utility model can optimize the impeller design and the bearing preload selection, thereby ensuring the stability and reliability of the equipment.

[0019] The utility model provides a more effective blower design verification method, reduces the risk of later maintenance and failure, and increases the overall service life of the equipment.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a structural diagram of a device for testing the axial force of a fan according to the utility model;

[0023] Figure 2 yes Figure 1 Schematic diagram of the internal structure after removing the fan body.

[0024] The meanings of the reference numerals in the figures are as follows.

[0025] Fan body 1, fan rear shell 2, fan front seat 3, first bearing 4, connecting rod 5, sensor mounting plate 6, sensor 7, second bearing 8, bearing seat 9, sensor contact block 10. DETAILED DESCRIPTION

[0026] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0028] Example

[0029] like Figures 1 and 2 As shown,

[0030] A device for testing the axial force of a fan includes a fan body 1, a fan rear shell 2 is installed at the rear end of the fan body 1, a fan front seat 3 is installed at the front end of the fan body 1, an impeller motor, an impeller and a main shaft are installed in the fan rear shell 2, the impeller motor drives the main shaft distributed along the front and rear directions to rotate, and the impeller is installed in the fan rear shell 2 near the front end on the main shaft.

[0031] The front end of the main shaft is installed together with the second bearing 8 on the fan front seat 3, a bearing seat 9 is installed on the fan front seat 3 at the front end of the second bearing 8, a first bearing 4 is installed on the fan front seat 3 outside the bearing seat 9, and a sensor 7 is installed on the sensor mounting plate 6 at the front end of the first bearing 4. The sensor mounting plate 6 is installed together with the rear end of the fan front seat 3 through several connecting rods 5. The sensor 7 is in contact with the first bearing 4 at the rear end.

[0032] A sensor contact block 10 is mounted in the first bearing 4, and the sensor 7 contacts the rear end of the sensor contact block 10. The sensor is mounted on one side of the blower to ensure accurate measurement of the axial force without affecting the normal operation of the blower.

[0033] The first bearing 4 is a linear bearing, and the second bearing 8 is a rotary bearing.

[0034] The sensor 7 is a strain gauge sensor or a pressure sensor. The high-precision sensor 7 installed near the blower bearing seat or the impeller is used to detect the axial force generated during the operation of the impeller in real time.

[0035] The sensor 7 of the present invention can be connected to an external data acquisition system to receive and record the axial force data collected by the sensor. The external data processing system can then dynamically analyze the axial force data to obtain a time-varying curve of the axial force, which can be used to verify the impeller design and bearing preload selection. The aforementioned data acquisition system and data processing system are conventional technologies in the art and can be applied to the technical solutions of the present invention.

[0036] The utility model provides a device for testing the axial force of a blower, aiming to solve the problems in the prior art of being unable to monitor the dynamic changes of the axial force in real time, insufficient measurement accuracy, and inaccurate design verification and bearing preload selection. The device has a simple structure and is easy to install and maintain. By installing a high-precision sensor near the blower bearing seat or impeller, the axial force generated during the operation of the impeller is collected in real time, and dynamic analysis is performed through a data acquisition and processing system. The equipment can not only accurately monitor the trend of axial force changes, but also compare and verify with the simulation value, thereby verifying the correctness of the simulation results and providing important data support for design optimization. It also provides a basis for impeller design and bearing preload selection according to actual working conditions, thereby optimizing the structural design of the blower and improving its operating performance and reliability.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for testing the axial force of a fan, comprising a fan body (1), a fan rear housing (2) installed at the rear end of the fan body (1), a fan front seat (3) installed at the front end of the fan body (1), an impeller motor, an impeller and a main shaft installed in the fan rear housing (2), the impeller motor drives the main shaft distributed along the front-back direction to rotate, and the impeller is installed in the fan rear housing (2) near the front end on the main shaft; Its characteristics are: The front end of the main shaft is mounted together with the second bearing (8) on the fan front seat (3); a bearing seat (9) is mounted on the fan front seat (3) at the front end of the second bearing (8); a first bearing (4) is mounted on the fan front seat (3) outside the bearing seat (9); a sensor (7) is mounted on the sensor mounting plate (6) at the front end of the first bearing (4); and the sensor (7) is in contact with the first bearing (4) at the rear end.

2. A device for testing the axial force of a fan according to claim 1, characterized in that: The sensor mounting plate (6) is mounted together with the fan front seat (3) at the rear end via a plurality of connecting rods (5).

3. The device for testing the axial force of a fan according to claim 1, characterized in that: A sensor contact block (10) is installed in the first bearing (4), and the sensor (7) is in contact with the sensor contact block (10) at the rear end.

4. The device for testing the axial force of a fan according to claim 1, characterized in that: The first bearing (4) is a linear bearing, and the second bearing (8) is a rotary bearing.

5. The device for testing the axial force of a fan according to claim 1, characterized in that: The sensor (7) is a strain gauge sensor or a pressure sensor.

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