Centrifugal fan vibration monitoring base support structure

Abstract

The utility model relates to industrial equipment vibration monitoring technical field. Provide a kind of centrifugal fan vibration monitoring pedestal support structure, comprising: base, sensor installation mechanism, limiting component and fan bearing seat, the fan bearing seat is set on the base, the limiting component is set on the base, the limiting component is connected with the fan bearing seat surface, the sensor installation mechanism is set on the base, the sensor installation mechanism is located the side of the limiting component. Solve the existing centrifugal fan vibration monitoring support and the connecting node are prone to loose due to split structure, insufficient rigidity, unstable vibration transmission, sensor fixed lack of anti-falling protection is prone to fall off, and the problem of complicated installation, low positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of industrial equipment vibration monitoring technology, and more specifically, to a centrifugal fan vibration monitoring base support structure. Background Technology

[0002] Vibration monitoring is a crucial aspect of ensuring the stable operation of industrial centrifugal fans. As an important load-bearing structure of the monitoring system, the performance of the vibration sensor mounting bracket directly affects the accuracy of the monitoring data and the safety of equipment operation.

[0003] Currently, existing centrifugal fan vibration monitoring brackets generally adopt a split-type structure design, which has obvious shortcomings: On the one hand, the connection node between the horizontal base and the vertical pole is prone to loosening due to the high-frequency vibration of the fan, resulting in insufficient overall rigidity and a dispersed and unstable vibration transmission path. This not only affects the accurate acquisition of vibration signals by the sensor, but may also cause bracket deformation after long-term use, exacerbating the distortion of monitoring data. On the other hand, the sensor is only fixed by a single-point bolt, lacking anti-fall protection. After the bolts become fatigued and loose, the sensor is prone to falling off, which may lead to monitoring interruption, equipment jamming and shutdown, or even safety accidents. In addition, the split structure requires the assembly of multiple parts on site, which is cumbersome and time-consuming to install, and the positioning accuracy is difficult to guarantee, affecting the installation efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a centrifugal fan vibration monitoring base support structure, which aims to solve the problems of loose connection nodes, insufficient rigidity, unstable vibration transmission, lack of anti-fall protection for sensor fixing and easy detachment, as well as cumbersome installation and low positioning accuracy caused by the split structure of existing centrifugal fan vibration monitoring supports.

[0005] This utility model is achieved through the following technical solution: A centrifugal fan vibration monitoring base support structure includes: a base, a sensor mounting mechanism, a limiting component, and a fan bearing housing. The fan bearing housing is disposed on the base, the limiting component is disposed on the base and connected to the surface of the fan bearing housing, and the sensor mounting mechanism is disposed on the base and located on the side of the limiting component.

[0006] Optionally, the sensor mounting mechanism includes a first sensor bracket and a second sensor bracket; wherein the first sensor bracket is used to mount a horizontal vibration sensor; and the second sensor bracket is used to mount a vertical vibration sensor.

[0007] Optionally, the first sensor bracket and the second sensor bracket are orthogonally distributed at 90 degrees.

[0008] Optionally, the first sensor bracket includes: a first sensor mounting base and a limiting frame, wherein the first sensor mounting base is perpendicularly connected to the side of the limiting frame, and the horizontal vibration sensor is mounted on the first sensor mounting base.

[0009] Optionally, the second sensor bracket includes a second sensor mounting base and a limiting plate, wherein the second sensor mounting base is vertically connected to the top of the limiting plate, the bottom of the limiting plate is fixedly connected to the base, and the vertical vibration sensor is mounted on the second sensor mounting base.

[0010] Optionally, the second sensor mounting base is provided with a stepped mounting hole, and the bottom of the vertical vibration sensor is embedded in the stepped mounting hole.

[0011] Optionally, the side of the second sensor mounting base is provided with a tightening bolt, the end of which abuts against the side of the vertical vibration sensor.

[0012] Optionally, the limiting component includes an L-shaped limiting seat, the horizontal part of which is fixedly connected to the base, and the vertical part of which is fitted and connected to the side of the fan bearing housing.

[0013] Optionally, the L-shaped limiting seat includes a horizontal base plate, a vertical plate, and reinforcing ribs. The vertical plate is vertically disposed on the horizontal base plate, the horizontal base plate is disposed on the base, and the reinforcing ribs are respectively connected to the horizontal base plate and the vertical plate.

[0014] Optionally, the mounting positions of the base and the limiting component are integrally cast with the bearing area of ​​the wind turbine bearing housing.

[0015] The technical solution of this utility model has at least the following advantages and beneficial effects: The integrated base structure design eliminates the weak links in the horizontal and vertical connection nodes of traditional split supports, effectively resists the risk of loosening caused by high-frequency vibration of the wind turbine, enhances the overall rigidity of the support, ensures the concentrated and stable vibration transmission path, provides a reliable installation foundation for vibration sensors, and guarantees the accuracy of vibration signal acquisition from a structural perspective, reducing the problem of monitoring data distortion caused by support deformation.

[0016] The dedicated sensor mounting mechanism provides a stable support for the vibration sensor. Compared with the traditional single-point bolt fixing method, it can effectively avoid the risk of sensor falling off due to bolt fatigue and loosening, ensure the continuous reliability of the vibration monitoring process, and reduce the risk of equipment jamming and shutdown and safety accidents caused by sensor falling off.

[0017] By directly connecting the limiting component with the wind turbine bearing housing, the base and the wind turbine bearing housing are positioned quickly and accurately. This simplifies the cumbersome process of assembling multiple components on-site for traditional split structures, reduces installation steps while ensuring installation positioning accuracy, significantly improves on-site installation efficiency, and reduces the operational difficulty during installation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the centrifugal fan vibration monitoring base support structure according to an embodiment of the present utility model; Figure 2 This is a front view schematic diagram of the centrifugal fan vibration monitoring base support structure according to an embodiment of the present utility model; Figure 3 This is a top view of the centrifugal fan vibration monitoring base support structure according to an embodiment of the present utility model; Icons: 1-Base, 2-First sensor mounting bracket, 3-Second sensor mounting bracket, 4-Limiting component, 5-Limiting frame, 6-Fan bearing housing. Detailed Implementation

[0019] The following is a detailed description of the embodiments, in conjunction with the accompanying drawings.

[0020] Reference Figure 1 , Figure 2 , Figure 3 A centrifugal fan vibration monitoring base support structure includes: a base 1, a sensor mounting mechanism, a limiting component 4, and a fan bearing seat 6. The fan bearing seat 6 is mounted on the base 1, the limiting component 4 is mounted on the base 1 and connected to the surface of the fan bearing seat 6, and the sensor mounting mechanism is mounted on the base 1 and located on the side of the limiting component 4.

[0021] The base 1 can be a one-piece molded structure, made by cast iron casting or steel welding, avoiding the connection nodes of traditional split structures (horizontal base and vertical pole splicing). The base 1 is flat, with a positioning reference surface machined on the surface to ensure a continuous and stable vibration transmission path. The base 1 has multiple threaded mounting holes for fixing the limit component 4 and the sensor mounting mechanism, and a recessed positioning groove with anti-slip texture is provided in the mounting area of ​​the corresponding fan bearing seat 6 for initial positioning of the fan bearing seat 6.

[0022] The limiting assembly 4 includes two sets of symmetrically arranged limiting units. Each limiting unit consists of a limiting plate, fastening bolts, and wear-resistant gaskets. The limiting plate can be made of 45# steel and has an L-shaped structure. Its vertical section is fixed to the pre-threaded holes of the base 1 by bolts, and the inner side of the horizontal section is attached with a wear-resistant rubber gasket (2-3mm thick). During installation, after the fan bearing housing 6 is embedded in the positioning groove of the base 1, the horizontal section of the limiting plate fits against the outer wall (side or top surface) of the fan bearing housing 6. By tightening the fastening bolts, the limiting plate and the fan bearing housing 6 are tightly pressed together, achieving rigid fixation of the fan bearing housing 6 and limiting its lateral and longitudinal displacement during vibration.

[0023] The sensor mounting mechanism is used to fix the vibration sensor and includes a mounting base, an anti-loosening fixing component, and an anti-detachment protection component. The mounting base can be a vertical protrusion structure integrally formed with the base 1, or it can be rigidly fixed to the base 1 by bolts. The mounting surface of the mounting base maintains a preset distance (usually 5-15mm) from the vibration-sensitive area (such as the outer ring of the bearing) of the fan bearing housing 6 to ensure effective transmission of vibration signals. The mounting base has at least two symmetrically distributed sensor mounting holes (the hole diameter matches the sensor fixing bolts). The anti-loosening fixing component includes high-strength bolts and disc spring washers. The sensor is fixed to the mounting base by bolts passing through the mounting holes. The disc spring washers are placed between the bolt head and the sensor, using the spring force to continuously apply preload and prevent the bolts from loosening due to high-frequency vibration fatigue. The anti-detachment protection component has elastic metal claws symmetrically arranged on both sides of the mounting base. One end of the claw is welded to the mounting base, and the other end is bent towards the sensor to form an arc-shaped hook structure. After the sensor is installed in place, the arc-shaped end of the claw fits tightly against the outer wall of the sensor. Even if the bolts loosen, the claws can still prevent the sensor from falling off through elastic clamping force.

[0024] The fan bearing housing 6 is an original component of the centrifugal fan. During installation, it is first embedded into the recessed positioning groove of the base 1 to achieve initial positioning. Then, it is clamped and fixed by the limiting plate of the limiting component 4 to ensure that there is no relative sliding between the fan bearing housing 6 and the base 1, and the vibration can be directly transmitted to the sensor installation mechanism through the base 1.

[0025] In some embodiments, the sensor mounting mechanism includes a first sensor bracket and a second sensor bracket; wherein the first sensor bracket is used to mount a horizontal vibration sensor; and the second sensor bracket is used to mount a vertical vibration sensor. The vibration of a centrifugal fan bearing housing includes multiple directional components, such as horizontal radial and vertical radial components, making it difficult for a single sensor to comprehensively capture the vibration characteristics. By using the first sensor bracket to directionally monitor horizontal vibration and the second sensor bracket to directionally monitor vertical vibration, parameters such as vibration acceleration and amplitude in two key directions can be obtained separately. This avoids signal loss or distortion due to directional deviation, providing more comprehensive data support for equipment fault diagnosis (such as bearing wear or rotor imbalance).

[0026] In some embodiments, the first sensor bracket and the second sensor bracket are orthogonally distributed at 90 degrees. Vibration signal transmission is direction-sensitive; if the sensor installation direction deviates from the vibration-sensitive direction, signal attenuation or feature loss may occur (e.g., if a horizontal vibration sensor is installed at an angle, interference signals from the vertical direction may be mixed in). The rigid 90-degree orthogonal distribution structure ensures that the first and second sensors are accurately aligned with the horizontal and vertical vibration-sensitive directions (consistent with the dominant vibration direction of the fan bearing housing), reducing signal distortion caused by directional misalignment and ensuring that the collected horizontal / vertical vibration acceleration, amplitude, and other parameters accurately reflect the equipment's vibration state.

[0027] In some embodiments, the first sensor bracket includes a first sensor mounting base 2 and a limiting frame 5. The first sensor mounting base 2 is vertically connected to the side of the limiting frame 5, and a horizontal vibration sensor is mounted on the first sensor mounting base 2. The vertical connection between the limiting frame 5 and the first sensor mounting base 2 forms a rigid support structure. The limiting frame 5 can be rigidly fixed to the base with bolts (or integrally formed with the base), providing stable mechanical support for the mounting base. This vertical connection method can effectively resist the shear force and bending moment under the high-frequency vibration of the wind turbine, reduce the elastic deformation or sway of the mounting base itself, avoid vibration signal transmission loss (such as signal attenuation and phase shift) caused by the vibration of the bracket structure, and ensure that the vibration signal of the wind turbine bearing housing 6 (especially the horizontal vibration sensitive parameter) can be stably and without distortion transmitted to the sensor.

[0028] In some embodiments, the second sensor bracket includes a second sensor mounting base 3 and a limiting plate. The top of the second sensor mounting base 3 is vertically connected to the limiting plate, and the bottom of the limiting plate is fixedly connected to the base 1. A vertical vibration sensor is mounted on the second sensor mounting base 3. The bottom of the limiting plate is rigidly fixed to the base 1, and the second sensor mounting base 3 is vertically connected to the top of the limiting plate, forming an integrated rigid support chain of "base-limiting plate-fixed base," which reduces the connection loosening problem caused by multi-node splicing in traditional split structures. This rigid structure can effectively resist the shear force and bending moment generated by the high-frequency vibration of the centrifugal fan, reduce the elastic deformation or sway of the mounting bracket itself, ensure that the vertical vibration signal is continuously and stably transmitted from the vibration-sensitive area of ​​the fan bearing seat (such as the vertical radial direction of the bearing) to the sensor, reduce signal attenuation or phase shift, and improve the accuracy of vertical vibration parameter (such as vertical acceleration and amplitude) acquisition.

[0029] In some embodiments, the second sensor mounting base 3 has stepped mounting holes, and the bottom of the vertical vibration sensor is embedded in the stepped mounting holes. The monitoring accuracy of the vertical vibration sensor depends on the consistency between the installation direction and the vibration-sensitive direction (it needs to be precisely aligned with the vertical radial vibration direction of the wind turbine bearing housing). The stepped mounting holes form a rigid positioning reference through the stepped structure of the hole walls. When the bottom of the sensor is embedded in the hole, the sidewalls of the hole can limit the sensor's horizontal displacement, ensuring that the sensor's mounting axis is strictly consistent with the vertical vibration direction. This avoids problems such as tilting and swaying that may occur with traditional bolt fixation, and reduces vibration signal acquisition distortion (such as signal attenuation and feature loss) caused by directional deviation.

[0030] In some embodiments, a tightening bolt is provided on the side of the second sensor mounting base 3, and the end of the tightening bolt abuts against the side of the vertical vibration sensor. Centrifugal fans generate high-frequency vibrations during operation. When traditional sensors are fixed only by axial bolts, even with anti-loosening washers, slight relative displacement between the sensor and the mounting base may still occur due to long-term high-frequency vibration. The tightening bolt applies a continuous abutting force to the sensor from the side, which, in conjunction with the radial limiting action of the stepped mounting hole, forms a multi-directional constraint structure of "axial fixing + radial tightening." This effectively suppresses slight lateral and torsional swaying of the sensor under high-frequency vibration conditions, ensuring the stability of the sensor's installation position.

[0031] In some embodiments, the limiting component 4 includes an L-shaped limiting seat. The horizontal portion of the L-shaped limiting seat is fixedly connected to the base 1, and the vertical portion of the L-shaped limiting seat is fitted to the side of the fan bearing housing 6. The L-shaped limiting seat is made of a rigid material (such as 45# steel), and its integrated structure of "horizontal portion-vertical portion" has high resistance to deformation, effectively resisting the shear force and bending moment generated by the high-frequency vibration of the centrifugal fan. The horizontal portion is rigidly fixed to the base 1 by bolts, and the vertical portion is directly fitted to the side of the fan bearing housing 6 and tightened by fastening bolts, forming a rigid connection chain of "base-limiting seat-bearing housing". This avoids the problem of insufficient rigidity caused by multi-node splicing in traditional split limiting structures, ensuring stable and reliable constraint on the fan bearing housing 6.

[0032] In some embodiments, the L-shaped limiting seat includes a horizontal base plate, a vertical plate, and reinforcing ribs. The vertical plate is vertically mounted on the horizontal base plate, which is mounted on the base 1. The reinforcing ribs are connected to both the horizontal base plate and the vertical plate. The horizontal base plate and the vertical plate are vertically connected to form an L-shaped base structure, while the reinforcing ribs are rigidly connected to both through a triangular stabilizing structure, effectively dispersing stress concentration at the connection between the horizontal base plate and the vertical plate. In the high-frequency vibration environment of centrifugal fans, the limiting seat needs to withstand the lateral and longitudinal impact forces and vibration bending moments transmitted from the fan bearing housing. The addition of reinforcing ribs can significantly improve the bending and shear strength of the L-shaped structure, avoiding problems such as tilting of the vertical plate and deformation of the horizontal base plate caused by long-term vibration in traditional L-shaped structures without reinforcing ribs, ensuring that the overall rigidity of the limiting seat meets the requirements of long-term high-intensity vibration conditions.

[0033] In some embodiments, the mounting positions of the base 1 and the limiting component 4 are integrally cast with the bearing area of ​​the fan bearing housing 6. In traditional split structures, the base, the mounting positions of the limiting component, and the bearing area of ​​the bearing housing are connected by bolts or welding, resulting in multiple rigid connection nodes. Under high-frequency vibration, these nodes are prone to loosening and deformation due to gaps or stress concentration, leading to insufficient overall rigidity. Integral casting eliminates the splicing nodes between components, forming a continuous and complete rigid whole with more uniform structural mechanical properties. Under the high-frequency vibration conditions of centrifugal fans, it can effectively resist the lateral and longitudinal impact forces and bending moments generated by vibration, avoiding the "rigid fracture" problem caused by loose nodes, ensuring the stability of the structure under long-term vibration environment, and fundamentally solving the defect of "dispersed and unstable vibration transmission path" in split structures.

Claims

1. A centrifugal fan vibration monitoring base support structure, characterized in that, include: The base (1), sensor mounting mechanism, limiting component (4) and fan bearing seat (6) are provided on the base (1), the limiting component (4) is provided on the base (1) and the limiting component (4) is connected to the surface of the fan bearing seat (6), the sensor mounting mechanism is provided on the base (1) and the sensor mounting mechanism is located on the side of the limiting component (4).

2. The centrifugal fan vibration monitoring base support structure as described in claim 1, characterized in that, The sensor mounting mechanism includes a first sensor bracket and a second sensor bracket; wherein, the first sensor bracket is used to mount a horizontal vibration sensor; and the second sensor bracket is used to mount a vertical vibration sensor.

3. The centrifugal fan vibration monitoring base support structure as described in claim 2, characterized in that, The first sensor bracket and the second sensor bracket are orthogonally distributed at 90 degrees.

4. The centrifugal fan vibration monitoring base support structure as described in claim 2, characterized in that, The first sensor bracket includes a first sensor mounting base (2) and a limiting frame (5). The first sensor mounting base (2) is vertically connected to the side of the limiting frame (5), and the horizontal vibration sensor is mounted on the first sensor mounting base (2).

5. The centrifugal fan vibration monitoring base support structure as described in claim 2, characterized in that, The second sensor bracket includes a second sensor mounting base (3) and a limiting plate. The second sensor mounting base (3) is vertically connected to the top of the limiting plate, and the bottom of the limiting plate is fixedly connected to the base (1). The vertical vibration sensor is mounted on the second sensor mounting base (3).

6. The centrifugal fan vibration monitoring base support structure as described in claim 5, characterized in that, The second sensor mounting base (3) has a stepped mounting hole, and the bottom of the vertical vibration sensor is embedded in the stepped mounting hole.

7. The centrifugal fan vibration monitoring base support structure as described in claim 5, characterized in that, The second sensor mounting base (3) has a tightening bolt on its side, and the end of the tightening bolt abuts against the side of the vertical vibration sensor.

8. The centrifugal fan vibration monitoring base support structure as described in claim 1, characterized in that, The limiting component (4) includes an L-shaped limiting seat, the horizontal part of which is fixedly connected to the base (1), and the vertical part of which is fitted and connected to the side of the fan bearing seat (6).

9. The centrifugal fan vibration monitoring base support structure as described in claim 8, characterized in that, The L-shaped limiting seat includes a horizontal base plate, a vertical plate and reinforcing ribs. The vertical plate is vertically arranged on the horizontal base plate, and the horizontal base plate is arranged on the base (1). The reinforcing ribs are connected to the horizontal base plate and the vertical plate respectively.

10. The centrifugal fan vibration monitoring base support structure as described in claim 1, characterized in that, The mounting positions of the base (1) and the limiting component (4) are integrally cast with the bearing area of ​​the fan bearing seat (6).

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