An acceleration sensor mounting tool for rolling bearing vibration detection

Abstract

The utility model relates to bearing detection technical field, concretely is an acceleration sensor installation frock for rolling bearing vibration detection, including sleeve, sleeve seat, spring, sleeve end cover, linear bearing and linear displacement mechanism, one end of sleeve is equipped with sleeve end cover, and the other end of sleeve is equipped with linear bearing, linear displacement mechanism includes the vibration pickup surveying rod and acceleration sensor fixedly connected as an organic whole, and the vibration pickup surveying rod sliding assembly is in the inner hole of linear bearing, and acceleration sensor is located in the sleeve, and the spring is arranged between acceleration sensor and sleeve end cover, sleeve outside is equipped with sleeve seat for installing fixed sleeve. The interference resistance of vibration pickup is guaranteed through the cooperation of vibration pickup surveying rod and linear bearing, makes the measured value smooth accurate transmission, avoids the emergence of abnormal value, and can conveniently and reliably install acceleration sensor in the specified experiment table position in the non-direct contact mode, thereby realizing the accurate measurement, quick installation and disassembly of sensor.

Description

Technical Field

[0001] This utility model relates to the field of bearing testing technology, specifically to an accelerometer mounting fixture for vibration testing of rolling bearings. Background Technology

[0002] In the laboratory, bearing testing and vibration detection of batch products often require the rapid installation of acceleration sensors. While magnetic mounting is faster, it is typically only suitable for the exterior of the test chamber, making it unsuitable for diagnosing and analyzing multiple bearings inside the test bench. Furthermore, in bearing vibration acceleration testing, an elastic contact method is frequently used to bring the sensor into contact with the test piece. This simple elastic contact method suffers from poor stability, frequently causing instability or errors in sensor measurements, such as zero values ​​or extremely high impact values. Additionally, the probe is prone to wear due to floating contact. This invention aims to solve these problems. Summary of the Invention

[0003] In view of the defects of the prior art, the purpose of this utility model is to provide an accelerometer mounting fixture for rolling bearing vibration detection, so as to ensure the installation stability and detection accuracy of the accelerometer.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an accelerometer mounting fixture for detecting the vibration of rolling bearings, comprising a sleeve, a sleeve seat, a spring, a sleeve end cap, a linear bearing, and a linear displacement mechanism. One end of the sleeve is provided with the sleeve end cap, and the other end of the sleeve is provided with the linear bearing. The linear displacement mechanism includes a vibration-sensing rod and an accelerometer fixedly connected as one unit. The vibration-sensing rod is slidably assembled in the inner hole of the linear bearing. The accelerometer is located inside the sleeve, and the spring is provided between the accelerometer and the sleeve end cap. A sleeve seat for mounting and fixing the sleeve is fitted outside the sleeve.

[0005] Furthermore, the linear bearing is mounted inside the sleeve via a bearing seat, the bearing seat has an external thread, the sleeve end has an internal thread, and the bearing seat is assembled inside the sleeve via a threaded connection.

[0006] Furthermore, the bearing is a nylon bearing.

[0007] Furthermore, the linear bearing is tightly fitted with the shaft housing.

[0008] Furthermore, a sensor cable is connected to the accelerometer, and the sensor cable passes through the central through hole of the spring and the sleeve end cap, outputting a signal to the test system.

[0009] Furthermore, the sleeve seat is slidably disposed outside the sleeve, and the sleeve seat is provided with a radially screw-in fastening knob, which fixes the relative position of the sleeve seat and the sleeve.

[0010] Furthermore, the sleeve seat has a flange interface, and the sleeve seat is connected to the life test bench tooling through the bolt holes of the flange interface.

[0011] Furthermore, the end of the vibration-sensing probe away from the sleeve has a carbide ball head.

[0012] Furthermore, the sleeve has a scale, which is machined onto a specially machined plane on the sleeve. This scale displays the distance the sleeve has moved relative to the sleeve seat.

[0013] Furthermore, the vibration pickup rod and the acceleration sensor are fixedly connected as a whole by connecting bolts.

[0014] The beneficial effects of this utility model are as follows: the cooperation between the vibration pickup rod and the linear bearing ensures the anti-interference of vibration pickup, so that the measured value is transmitted smoothly and accurately, avoiding the occurrence of abnormal values; at the same time, it can conveniently and reliably install the accelerometer at the designated experimental platform position in a non-direct contact manner, thereby realizing accurate measurement, quick installation and disassembly of the sensor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the accelerometer sensor mounting fixture in this utility model; Figure 2 This is a cross-sectional view of the accelerometer sensor mounting fixture in this utility model; In the diagram: 1. Carbide ball head, 2. Vibration sensor rod, 3. Linear bearing, 4. Nylon bearing seat, 5. Connecting bolt, 6. Accelerometer, 7. Sleeve, 8. Spring, 9. Sensor cable, 10. Sleeve end cap, 11. Fastening knob, 12. Sleeve seat. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] See appendix Figure 1-2An accelerometer mounting fixture for detecting vibration in rolling bearings includes a carbide ball head 1, a vibration-sensing probe 2, a linear bearing 3, a nylon bearing seat 4, connecting bolts 5, an accelerometer 6, a sleeve 7, a spring 8, a sensor cable 9, a sleeve end cap 10, a fastening knob 11, and a sleeve base 12. One end of the sleeve 7 is provided with the sleeve end cap 10, and the other end of the sleeve 7 is provided with the nylon bearing seat 4, which houses the linear bearing 3. The vibration-sensing probe 2 and the accelerometer 6 are fixedly connected by the connecting bolts 5. The components are integrated into a linear displacement mechanism based on the linear bearing 3. The vibration-sensing probe 2 is slidably mounted in the inner hole of the linear bearing 3 along the balls of the linear bearing 3. The end of the vibration-sensing probe 2 away from the sleeve has a carbide ball head, which contacts the workpiece under test. The acceleration sensor 6 is located inside the sleeve 7, and a spring 8 is provided between the acceleration sensor 6 and the sleeve end cap 10. A sensor cable is connected to the acceleration sensor, which passes through the central through hole of the spring and the sleeve end cap, and outputs a signal to the testing system. A sleeve seat 12 for mounting and fixing the sleeve is fitted on the outside of the sleeve 7. The sleeve seat 12 is slidably disposed outside the sleeve 7 and has a radial fastening knob 11. The relative position of the sleeve seat 12 and the sleeve 7 is fixed by the fastening knob 11. The sleeve seat 12 has a flange interface, and the sleeve seat 12 is connected to the life test bench tooling through the bolt holes of the flange interface.

[0018] This fixture is mounted on a life test bench via accessories to measure the vibration of internal bearings. It features a mounting flange interface and graduated control on the outside of the sleeve, allowing adjustment for bearings of different sizes to ensure measurement consistency. The vibration pickup rod 2, acceleration sensor 6, and linear bearing 3 are integrated into a single unit, resulting in better control accuracy for high-frequency vibration measurements and making it an excellent structure for vibration acceleration measurement.

[0019] Furthermore, the nylon bearing seat 4 is provided with external threads, and the sleeve end is provided with internal threads. The nylon bearing seat 4 is assembled inside the sleeve 7 via a threaded connection. The linear bearing 3 is tightly fitted with the nylon bearing seat 4. The nylon bearing seat 4 is made of soft material, and the metal linear bearing 3 is press-fitted to the nylon bearing seat 4 to form a tight fit.

[0020] Furthermore, the sleeve end cap 10 and the sleeve 7 are connected by threads.

[0021] The sleeve end cap 10 and the nylon bearing seat 4 of this utility model are both integrated in the sleeve 7, which has high stability and is easy to disassemble and assemble.

[0022] Furthermore, the sleeve 7 has a scale directly machined onto it. This scale displays the distance the sleeve has moved relative to the sleeve seat. After the carbide ball head 1 contacts the outer ring surface of the bearing being measured, adjusting the sleeve position compresses the spring inside the sleeve; the adjusted scale value corresponds to the amount of spring compression.

[0023] Generally, vibration acceleration measurement requires perpendicular contact with the object under test. However, due to space limitations and the application of combined loads, the test bench may sometimes experience overturning moments, causing the bearing to tilt at a slight angle. When the bearing rotates, the smooth operation of the vibration pickup probe within the mating hole is challenged, which places higher demands on the reliability of the mating hole. If the probe of the sleeve head has dry friction with the mating hole, when the test fixture is deep and the probe is long, it often causes probe extension and retraction delays or jamming. To avoid wear and jamming of the mating surface and the resulting vibration measurement errors, the linear bearing 3 installed in the nylon bearing seat 4 effectively solves this problem.

[0024] The carbide ball head 1 improves the durability of the probe and extends the service life of the tooling. When the bearing under test vibrates, the spring 8 and the acceleration sensor 6 move together with the vibration pickup rod 2. The spring 8 is compressed and rebounds within a certain elastic range. At this time, the scale on the sleeve 7 can provide a reference. When the vibration acceleration is read, the spring is pressed down by three to five more scales to achieve stable acquisition of the vibration signal.

[0025] In addition, since excessive length of the vibration pickup rod 2 may reduce its stiffness and increase its mass, thereby reducing the natural frequency of the bearing and vibration measurement system structure after coupling, the length-to-diameter ratio should be reduced as much as possible, and a vibration pickup rod with a higher elastic modulus should be used, such as a lightweight and high-strength material.

[0026] The specific measurement method is as follows: First, assemble the vibration accelerometer-spring-sleeve mechanism 1-10. The accelerometer 6 is fixed to the vibration pickup rod 2 by the connecting bolt 5. The vertical movement of the vibration pickup rod 2 is ensured by the linear bearing 3. The sensor cable 9 passes through the central through hole of the spring 8 and the sleeve end cap 10, and outputs a signal to the test system. The sleeve seat 12 is installed on the life test bench fixture, corresponding to the position directly above the outer ring of the bearing. At this time, start the equipment and slide the vibration accelerometer-spring-sleeve mechanism in the sleeve seat 12. When a stable vibration acceleration signal appears on the vibration measurement interface, it indicates that the carbide ball head 1 is in contact with the surface of the outer ring of the bearing being tested. At this time, gently press the device down three to five scale values ​​(the sleeve 7 moves three to five scale values ​​relative to the sleeve seat 12). Then, lock the sleeve 7 by tightening the fastening knob 11 to obtain a continuous and stable vibration signal.

[0027] The advantages of this patent are as follows: Vibration measurement requires high accuracy in data acquisition. The linear bearing in this patent ensures the anti-interference capability of vibration pickup, enabling stable and accurate transmission of measured values ​​and avoiding the occurrence of outliers; the carbide head solves the problem of probe lifespan, ensuring its long-term stable operation on the bearing testing machine; and the sleeve scale ensures the adjustability, repeatability, and consistency of the vibration force measurement method.

[0028] It should be noted that the parts of this utility model not described in detail are existing technologies.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] The above examples are merely preferred embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. An accelerometer mounting fixture for detecting vibration in rolling bearings, characterized in that: The device includes a sleeve, a sleeve seat, a spring, a sleeve end cap, a linear bearing, and a linear displacement mechanism. One end of the sleeve is provided with the sleeve end cap, and the other end of the sleeve is provided with the linear bearing. The linear displacement mechanism includes a vibration-sensing rod and an acceleration sensor fixedly connected as one unit. The vibration-sensing rod is slidably assembled in the inner hole of the linear bearing. The acceleration sensor is located inside the sleeve, and the spring is provided between the acceleration sensor and the sleeve end cap. A sleeve seat for mounting and fixing the sleeve is fitted on the outside of the sleeve.

2. The accelerometer mounting fixture for rolling bearing vibration detection according to claim 1, characterized in that: The linear bearing is mounted inside the sleeve via a bearing seat. The bearing seat has an external thread, and the sleeve end has an internal thread. The bearing seat is assembled inside the sleeve via a threaded connection.

3. The accelerometer mounting fixture for rolling bearing vibration detection according to claim 2, characterized in that: The bearing is a nylon bearing.

4. The accelerometer mounting fixture for rolling bearing vibration detection according to claim 2, characterized in that: The linear bearing is tightly fitted to the shaft housing.

5. The accelerometer mounting fixture for rolling bearing vibration detection according to claim 1, characterized in that: The accelerometer is connected to a sensor cable, which passes through the central through hole of the spring and the sleeve end cap, and outputs a signal to the test system.

6. The accelerometer mounting fixture for rolling bearing vibration detection according to claim 1, characterized in that: The sleeve seat is slidably disposed outside the sleeve, and the sleeve seat is provided with a radially screw-in fastening knob, which fixes the relative position of the sleeve seat and the sleeve.

7. The accelerometer mounting fixture for rolling bearing vibration detection according to claim 1, characterized in that: The sleeve seat has a flange interface, and the sleeve seat is connected to the life test bench tooling through the bolt holes of the flange interface.

8. The accelerometer mounting fixture for rolling bearing vibration detection according to claim 1, characterized in that: The end of the vibration-sensing probe away from the sleeve has a hard alloy ball head.

9. The accelerometer mounting fixture for rolling bearing vibration detection according to claim 1, characterized in that: The sleeve has a scale.

10. The accelerometer mounting fixture for rolling bearing vibration detection according to claim 1, characterized in that: The vibration pickup rod and the acceleration sensor are fixedly connected as one unit by connecting bolts.

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