Bearing seat for simulating static eccentricity fault of generator

Abstract

The utility model discloses a fault simulation bearing seat for simulating an air gap static eccentricity fault of a generator. The fault simulation bearing seat comprises a bottom fixing plate and a simulation generator. The simulation generator is composed of a generator stator and a generator rotor, the generator stator is fixed on the bottom fixing plate, a rotor shaft of the generator rotor extends out of the two ends of the stator, and a bearing is installed on the rotor shaft. The bearing is supported by a bearing seat, and the bearing seat is fixed on the bottom fixing plate. An adjustable eccentric block is arranged in the bearing seat, and static eccentric fault simulation of different degrees can be achieved through bolt adjustment. According to the utility model, air gap static eccentricity faults of various degrees can be simulated visually and conveniently, an experimental basis is provided for analysis, research and prevention of generator static eccentricity faults, and the defects of a permanent magnet generator in the field of air gap eccentricity fault simulation experiments are made up at the same time.

Description

Technical Field

[0001] This utility model relates to the field of mechanical fault simulation technology, specifically to a fault simulation bearing housing for simulating air gap eccentricity faults in generators. It is suitable for experimental research and diagnostic methods for generator eccentricity faults, and is particularly applicable to the simulation of static eccentricity faults in permanent magnet generators. Background Technology

[0002] As a critical power conversion device, the operational stability of generators directly affects the safety and efficiency of the power system. In actual operation, generators are prone to air gap eccentricity faults due to manufacturing errors, assembly problems, and harsh operating environments. Air gap eccentricity is one of the common mechanical faults in generators, and based on the uneven distribution of the air gap, it can be divided into static eccentricity and dynamic eccentricity. Static eccentricity refers to a fixed offset between the rotor center and the stator center, resulting in uneven air gap distribution, causing electromagnetic field degradation, increased equipment vibration, and mechanical losses. Dynamic eccentricity refers to the rotor center not coinciding with the rotation center, with the minimum air gap position changing as the rotor rotates, further aggravating generator vibration and damage.

[0003] The hazards of air gap eccentricity faults are significant. Static eccentricity can lead to an imbalance in the radial electromagnetic force distribution, inducing abnormal vibration and component wear between the stator and rotor; dynamic eccentricity can easily deteriorate bearing conditions, causing stator core deformation, winding wear, and insulation failure, and in severe cases, even leading to equipment performance degradation and economic losses. Especially in the widespread application of permanent magnet generators in wind power generation, air gap eccentricity faults pose a serious challenge to equipment reliability and service life.

[0004] Currently, research on air gap eccentricity faults mainly focuses on theoretical modeling and computer simulation analysis. However, these methods struggle to realistically reproduce the complex operating conditions and eccentricity characteristics of generators, and in the experimental verification phase, there is a lack of experimental devices capable of simulating static and dynamic air gap eccentricity faults. Some existing devices have significant shortcomings in terms of eccentricity adjustment accuracy, flexibility, and controllability of eccentricity degree, making it difficult to meet practical research needs.

[0005] To address this issue, there is an urgent need to design a novel experimental device capable of flexibly simulating air gap eccentricity faults of varying degrees, thus filling the gaps in current experimental equipment. This is particularly challenging for permanent magnet generators, whose air gap eccentricity faults are made even more difficult by the unique structure of the rotor and stator.

[0006] This invention provides a novel experimental device that can simulate static eccentricity faults of varying degrees in permanent magnet generators. The device boasts advantages such as simple structure, flexible operation, and high precision in eccentricity adjustment. It can visually demonstrate the impact of air gap eccentricity on generator performance and provide strong experimental support for related fault diagnosis, analysis, and protection. Utility Model Content

[0007] This invention relates to an experimental device for simulating air gap eccentricity faults in generators, particularly suitable for simulating dynamic and static eccentricity faults in external rotor permanent magnet generators. This device can intuitively and conveniently simulate different degrees of static and dynamic air gap eccentricity faults, providing important experimental support for the analysis, research, and prevention of generator eccentricity faults.

[0008] The first technical solution of this utility model is: a bearing housing for simulating static eccentricity faults in a generator, comprising a bottom fixing plate, a simulated generator, and a bearing housing. The simulated generator includes a generator stator and a generator rotor. The generator stator is fixed on the bottom fixing plate, and the rotor shaft of the generator rotor extends from both ends of the generator stator. Bearings are fixed on the rotor shaft. The bearings are supported by a bearing housing, which is fixed on the bottom fixing plate. An eccentric block is provided inside the bearing housing. The eccentric block is adjusted by bolts to offset the bearing center relative to the rotor shaft, thereby simulating static eccentricity faults of different degrees.

[0009] The second technical solution of this utility model is: as described in the first technical solution above, the simulated generator static eccentric fault bearing housing, wherein the eccentric block can slide along the radial direction of the bearing housing, and the radial displacement of the eccentric block can be precisely controlled by adjusting the rotation of the bolt.

[0010] The third technical solution of this utility model is: the simulated generator static eccentric fault bearing housing as described in the first technical solution above, wherein the eccentric block is made of high-strength metal material, which has good wear resistance and stability to ensure experimental accuracy.

[0011] The fourth technical solution of this utility model is: as described in the first technical solution above, the simulated generator static eccentricity fault bearing housing has an adjustment hole on the bottom fixing plate for fixing the position of the bearing housing and facilitating assembly and disassembly.

[0012] The fifth technical solution of this utility model is: a simulated generator static eccentricity fault bearing housing as described in the first technical solution above, wherein the simulated generator is a permanent magnet generator, used to simulate the air gap static eccentricity fault of a permanent magnet generator.

[0013] The sixth technical solution of this utility model is: a simulated generator static eccentricity fault bearing housing as described in the first technical solution above, wherein the bolt is a precision adjusting bolt so as to finely adjust the eccentricity during the experiment.

[0014] This device includes a bottom mounting plate, a simulated generator, and bearing housings. The simulated generator consists of a stator and a rotor. The stator is fixedly mounted on the bottom mounting plate, and the rotor extends from both ends of the stator via rotor shafts supported by bearings. The bearings are installed in bearing housings, which are fixed to the bottom mounting plate. Adjustable eccentric blocks are installed within the bearing housings. The position of the eccentric blocks is adjusted via bolts, thereby flexibly controlling the amplitude of air gap eccentricity and simulating different degrees of static eccentricity faults. Furthermore, the device structure supports dynamic eccentricity simulation. By designing an adjustment device to deviate the rotor center from the rotation center, dynamic eccentricity faults can be reproduced.

[0015] Compared with the prior art, this utility model has the following features and advantages:

[0016] Multifunctionality: It can not only simulate static eccentricity of the air gap, but also dynamic eccentricity, filling the gap in the current experimental equipment for comprehensive simulation of eccentricity faults;

[0017] Flexible adjustment: The position of the eccentric block is adjusted by bolts to achieve precise control of the eccentricity amplitude;

[0018] Simple structure: The device is reasonably designed, easy to install and operate, and highly flexible in experiments;

[0019] The research is of great significance: the experimental setup allows for a direct study of the impact of air gap eccentricity faults, providing a reliable basis for fault diagnosis and prevention.

[0020] This invention is not only applicable to the simulation study of air gap eccentricity faults in external rotor permanent magnet generators, but can also be widely applied to the experimental analysis of eccentricity faults in other rotating machinery, providing technical support for the optimized design and fault prevention of related machinery. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention, showing the overall structure and main components of the experimental device used to simulate air gap eccentricity faults in generators.

[0022] exist Figure 1 In the main components: 1. Bottom fixing plate: The basic structure supporting the entire device, used to fix the experimental unit and ensure the stability of the device operation. 2. Bearing housing: Supports and fixes the bearing, with an eccentric block inside, which can simulate air gap eccentricity faults (static and dynamic eccentricity) by adjusting bolts. 3. Bearing: Installed in the bearing housing, used to support the generator rotor shaft and ensure its smooth rotation. 4. Simulated generator: Composed of generator stator and generator rotor, used to realize the experimental function; the generator stator is fixed to the bottom fixing plate, and the rotor extends to both ends through the rotor shaft and is connected to other structural components.

[0023] Figure 2The left view of the bearing housing further illustrates the internal structure and specific functional components: 3-1 is the upper cover of the bearing housing: fixed to the main body of the bearing housing by bolts, used to enclose and protect the bearing assembly; 3-2 is the bolt fastener: used to connect the upper and lower covers, ensuring the stability of the bearing housing structure; 3-3 is the eccentric adjustment bolt: the position of the eccentric block is adjusted by rotation, thereby simulating different degrees of air gap eccentricity; 3-4 is the lower cover of the bearing housing: together with the upper cover, it forms a closed structure, providing support for the bearing assembly.

[0024] Figure 3 This is a cross-sectional view of the eccentric adjustment device, which shows the details of the eccentric structure and adjustment device, as well as the assembly relationship between the eccentric block and the bearing housing and other components: 3-5 is the eccentric block: installed inside the bearing housing, the static eccentricity and dynamic eccentricity are adjusted by adjusting bolt (3-3).

[0025] Figure 4 This is an assembly diagram of the experimental device of this utility model, showing the complete assembly relationship between the bottom fixing plate, bearing seat, bearing and simulated generator, further clarifying the connection position and installation logic of each component, and helping to understand the overall operating principle of the device. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are all within the protection scope of the present utility model.

[0027] Example 1 Figure 1 As shown, this utility model provides an experimental device for simulating air gap eccentricity faults in generators, including a bottom fixing plate (1), a bearing seat (2), a bearing (3), and a simulated generator (4).

[0028] The bottom fixing plate (1) is the basic structure of the device. It is made of high-strength metal material and has excellent vibration resistance. It is used to support the entire experimental device and fix the experimental unit, thereby ensuring the stability and reliability of operation.

[0029] The bearing housing (2) is mounted on the bottom fixed plate (1). It includes an eccentric block and an adjusting bolt. The static and dynamic eccentricity of the air gap can be simulated by adjusting the eccentric block.

[0030] The bearing (3) is installed in the bearing housing (2) to support the rotor shaft (not shown) of the generator and ensure that it can rotate smoothly.

[0031] The simulated generator (4) includes a generator stator and a generator rotor, wherein the stator is fixed on the bottom mounting plate (1), and the rotor extends to both ends of the bearing via a rotor shaft. By adjusting the eccentricity of the eccentric blocks in the bearing housing (2), different amplitudes of air gap eccentricity can be achieved in the experiment, thereby meeting the simulation requirements for static and dynamic eccentricity faults.

[0032] Example 2 Figure 2 As shown, the bearing housing (2) of this utility model is composed of multiple components, including the upper cover of the bearing housing (3-1), the lower cover of the bearing housing (3-4), the eccentric adjusting bolt (3-3), and the bolt fastener (3-2).

[0033] The upper cover (3-1) and lower cover (3-4) of the bearing housing are securely connected by bolt fasteners (3-2) to form a closed structure to protect the internal bearing assembly.

[0034] The eccentric adjustment bolt (3-3) dynamically adjusts the eccentricity by rotating to change the position of the eccentric block. This design is simple, easy to operate, and enables high-precision fault simulation.

[0035] The bearing housing cover (3-4) is a load-bearing structure that is directly connected to the bottom fixing plate (1), providing sufficient stability for the experiment.

[0036] Example 3 Figure 3 As shown, the cross-sectional view of the eccentric adjustment device clearly illustrates the structure and function of the eccentric block (3-5):

[0037] An eccentric block (3-5) is installed inside the bearing housing, and its position can be adjusted by the eccentric adjusting bolt (3-3) to change the eccentricity of the air gap. The eccentric block is made of high-strength wear-resistant metal to ensure its stability and accuracy during long-term use.

[0038] This device can flexibly simulate air gap eccentricity faults in generators during actual operation, providing an experimental basis for studying and analyzing vibration and electromagnetic changes caused by eccentricity faults, and can also verify the effectiveness of fault detection technology under different eccentricity states.

[0039] The embodiments of this invention simplify the assembly and operation of the device through modular design, and improve the repeatability and reliability of the experiment. This device can be widely used in generator design optimization, fault diagnosis, and teaching experiments, providing an efficient and reliable experimental platform for related research.

Claims

1. A static eccentric fault bearing seat of a simulation generator, comprising a bottom fixed plate, a simulation generator and a bearing seat, characterized in that: The simulation generator comprises a generator stator fixed on a bottom fixed plate and a generator rotor, a rotor shaft of the generator rotor extending from both ends of the generator stator, and a bearing fixed on the rotor shaft; the bearing is supported by a bearing seat, and the bearing seat is fixed on the bottom fixed plate; an eccentric block is arranged in the bearing seat, and the eccentric block is adjusted by a bolt to offset the center of the bearing relative to the rotor shaft, thereby simulating different degrees of static eccentricity fault.

2. The simulated generator static eccentricity fault bearing seat of claim 1, wherein: The eccentric block can slide along the radial direction of the bearing seat, and the radial displacement of the eccentric block can be accurately controlled by adjusting the rotation of the bolt.

3. The simulated generator static eccentricity fault bearing seat of claim 1, wherein: The eccentric block is made of high-strength metal material and has good wear resistance and stability to ensure the experimental accuracy.

4. The simulated generator static eccentricity fault bearing seat of claim 1, wherein: The bottom fixed plate is provided with an adjusting hole for fixing the position of the bearing seat and facilitating assembly and disassembly.

5. The simulated generator static eccentricity fault bearing seat of claim 1, wherein: The simulation generator is a permanent magnet generator for simulating the air gap static eccentricity fault of the permanent magnet generator.

6. The simulated generator static eccentricity fault bearing seat of claim 1, wherein: The bolt is a precision adjusting bolt to finely adjust the eccentricity in the experiment.

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