A probe mounting bracket for shaft vibration detection

Abstract

The utility model relates to mechanical detection technical field especially relates to a kind of probe mounting bracket for shaft body vibration detection, it includes the rotating shaft body to be measured and the bearing bush surrounded in rotating shaft body, the side surface of bearing bush is fixed with two mounting brackets, each the mounting bracket is fixed with one vibration probe, the vibration probe is perpendicular to the circumferential surface of rotating shaft body and is close not contact, the axis of two the vibration probe is perpendicular to each other.The utility model is fixed with bearing bush and is not loose and moves under vibration as the mounting bracket of vibration probe installation base, the axis of two vibration probes after installation coincides with the radial of rotating shaft body, and two the vibration probe is perpendicular to each other, so that the two measuring points on the rotating shaft body checked are also perpendicular to each other, to improve vibration detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of mechanical testing technology, and in particular to a probe mounting bracket for shaft vibration testing. Background Technology

[0002] High-speed rotating shafts, such as the main shaft of a steam turbine, experience high-frequency, low-amplitude vibrations. When the shaft operates safely and stably, its vibration frequency and amplitude remain relatively constant. However, when a malfunction occurs in the shaft or other mechanisms, the shaft's operation becomes unstable, and the vibration frequency and amplitude generated by its rotation change abruptly. Based on the relationship between the shaft's operating conditions and its generated vibration frequency and amplitude, for some critical shafts that require constant monitoring of their operating conditions, vibration monitoring can be used to determine whether the shaft is operating safely and stably. This allows for timely shutdown and inspection, preventing safety accidents and significant losses.

[0003] However, because the shaft rotation generates high-frequency, low-amplitude vibrations, these vibrations are transmitted to fixed components and then to vibration detection elements mounted on those components. This can cause the vibration detection elements to become loose or shift in position, resulting in distorted detection data. Consequently, it becomes difficult to detect unstable shaft operation in a timely manner, preventing timely shutdown and maintenance. This leads to continued equipment operation, posing a safety risk and rendering the monitoring meaningless.

[0004] Therefore, this case aims to provide a stable and reliable probe installation solution to resist the effects of vibration, prevent the probe from becoming loose and shifting position, and avoid distortion of the detection data. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a probe mounting bracket for shaft vibration detection. By optimizing the probe mounting structure and detection method, it can more accurately detect the operating conditions of the shaft and is suitable for vibration monitoring and fault diagnosis of rotating machinery.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a probe mounting bracket for shaft vibration detection, including a rotating shaft to be tested and a bearing shell surrounding the rotating shaft. Two mounting brackets are fixed to the side of the bearing shell, and each mounting bracket is fixed with a vibration probe. The vibration probe is perpendicular to the circumferential surface of the rotating shaft and is close to but not in contact with it. The axes of the two vibration probes are perpendicular to each other. The vibration probe is a cylinder, and the axes of the two vibration probes coincide with the radial direction of the rotating shaft. In this way, the vibration probe can simultaneously detect two mutually perpendicular points on the circumference of the rotating shaft, thereby accurately detecting the operating condition of the rotating shaft.

[0007] Preferably, the two vibration probes are symmetrical about the vertical plane containing the axis of the rotating shaft.

[0008] Preferably, the distance between the front ends of the two vibration probes and the circumferential surface of the rotating shaft is the same.

[0009] Preferably, the mounting bracket is L-shaped, with one side plate having a circular hole of the same diameter as the vibration probe. The vibration probe is inserted into the circular hole and fixedly connected to the mounting bracket by threading a nut at each end of the circular hole. The other side plate of the mounting bracket has at least two threaded holes, and the side of the bearing bush also has the same number of threaded holes with the same inner diameter. The mounting bracket is fixedly connected to the bearing bush by threaded screws in the threaded holes.

[0010] Preferably, a flat washer and a spring washer are fitted between the screw nut and the mounting bracket.

[0011] Preferably, a rubber pad or adhesive is provided between the mounting bracket and the side of the bearing to increase friction.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. Precise detection: By installing two mutually perpendicular vibration probes on the bearing bush, vibration signals in two mutually perpendicular directions on the circumference of the shaft can be detected simultaneously, thus reflecting the operating condition of the shaft more comprehensively and accurately.

[0014] 2. Structural optimization: The L-shaped mounting bracket design makes probe installation more flexible. The connection method of nuts and screws makes it easy to adjust the position and angle of the probe, ensuring that the vertical distance between the probe and the circumferential surface of the shaft is consistent and does not contact, thus avoiding signal distortion.

[0015] 3. High stability: By adding flat washers and spring washers between the screws and the mounting bracket, and adding rubber pads or adhesives between the mounting bracket and the bearing bush, the tightness and vibration resistance of the connection are effectively improved, ensuring that the probe is stable and reliable during equipment operation.

[0016] 4. Easy installation: The mounting bracket of this utility model has a simple structure, and the installation and adjustment are convenient. It is suitable for various shaft vibration detection scenarios, reducing the cost and difficulty of equipment maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a probe mounting bracket for shaft vibration detection according to this utility model;

[0018] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0019] Figure 3This is a cross-sectional schematic diagram of the threaded connection between the mounting bracket and the bearing bush.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1—Rotating shaft, 2—Bearing shell, 3—Mounting bracket, 4—Vibration probe, 5—Screw. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the present invention.

[0023] like Figures 1-3 As shown, this embodiment of a probe mounting bracket for shaft vibration detection includes a rotating shaft 1 to be detected and a fixed bearing 2 surrounding the rotating shaft 1. In order to improve the detection accuracy, this embodiment sets two vibration probes 4 to simultaneously monitor two points on the circumferential surface of the rotating shaft. The two points are located on the same cross section of the rotating shaft 1, and the two points are perpendicular to the line connecting the center of the rotating shaft 1.

[0024] The two vibration probes 4 are installed as follows: Two threaded holes are drilled at two locations on the side of the bearing bush 2. Then, an L-shaped mounting bracket 3 is installed. One side plate of the mounting bracket 3 has two identical threaded holes corresponding to the positions and sizes of the two threaded holes on the bearing bush 2. Screws 5 are then threaded into these two holes to fix the mounting bracket 3 to the side of the bearing bush 2. A circular hole is provided in the middle of the other side plate of the mounting bracket 3. The vibration probe 4 is inserted into this hole, and nuts are threaded onto both sides to fix the vibration probe 4 to the mounting bracket 3. Adjusting the nuts on both sides adjusts the distance between the front end of the vibration probe 4 and the axial surface of the rotating shaft 1. To ensure high detection accuracy and prevent distortion, this distance is consistent.

[0025] The axis of the installed vibration probe 4 coincides with the radial direction of the rotating shaft 1, and the two vibration probes 4 are symmetrical about the vertical plane that accommodates the axis of the rotating shaft 1.

[0026] In addition, to make the connection between the mounting bracket 3 and the bearing 1 more secure, preventing loosening and even reducing vibration, a flat washer and a spring washer are fitted between the nut of the screw 5 and the mounting bracket 3; a rubber pad or adhesive to increase friction is provided between the mounting bracket 3 and the side of the bearing 2.

[0027] The installation and detection method of vibration probe 4 in this embodiment, as demonstrated by experimental testing, significantly improves the accuracy and comprehensiveness of shaft vibration detection. Compared with traditional probe installation methods, the detection accuracy of this embodiment is improved by approximately 20%, and it can simultaneously detect vibration signals in two mutually perpendicular directions on the shaft circumference, providing more comprehensive data support for equipment fault diagnosis.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, and for the convenience of describing the technical solution, the front, back, left, right, top, middle, and bottom orientations are based on the accompanying drawings and are not a limitation on the protection scope of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the essence and scope of the technical solution of this utility model.

Claims

1. A probe mounting bracket for shaft vibration detection, characterized in that: The test includes a rotating shaft to be tested and a bearing shell surrounding the rotating shaft. Two mounting brackets are fixed to the side of the bearing shell, and each mounting bracket is fixed with a vibration probe. The vibration probe is perpendicular to the circumferential surface of the rotating shaft and is close to but not in contact with it. The axes of the two vibration probes are perpendicular to each other.

2. The probe mounting bracket for shaft vibration detection according to claim 1, characterized in that: The two vibration probes are symmetrical about the vertical plane containing the axis of the rotating shaft.

3. The probe mounting bracket for shaft vibration detection according to claim 1, characterized in that: The distance between the front ends of the two vibration probes and the circumferential surface of the rotating shaft is the same.

4. The probe mounting bracket for shaft vibration detection according to claim 1, characterized in that: The mounting bracket is L-shaped, with a circular hole of the same diameter as the vibration probe on one side plate. The vibration probe is inserted into the circular hole and fixedly connected to the mounting bracket by a nut threaded to each end of the circular hole. The other side plate of the mounting bracket is provided with at least two threaded holes, and the side of the bearing bush is also provided with the same number of threaded holes of the same inner diameter. The mounting bracket is fixedly connected to the bearing bush by screws threaded to the threaded holes.

5. A probe mounting bracket for shaft vibration detection according to claim 4, characterized in that: A flat washer and a spring washer are fitted between the screw nut and the mounting bracket.

6. The probe mounting bracket for shaft vibration detection according to claim 1, characterized in that: A rubber pad or adhesive is provided between the mounting bracket and the side of the bearing to increase friction.

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