A sensor for testing vibrations and noise of a rotating object

Abstract

The utility model discloses a kind of sensors for testing rotating object vibration and noise, it is related to vibration detection technical field. Including cylindrical outer shell, upper cover, bottom cover, outer shell one end is equipped with integrally-formed probe, probe end is connected conducting connector by thread connection, conducting connector other end connects damping assembly, damping assembly middle part is inserted guide rod, guide rod is connected with conducting connector through wire harness and signal is transmitted to external host computer;The utility model adopts bone conduction contact type acquisition technology, directly obtains vibration signal through ball head contact to be measured object shell, avoids air conduction background noise interference from source, without mute box;Damping assembly effectively filters interference signal, ensure test accuracy;Simple structure, installation is convenient, it is suitable for the real-time vibration noise test of motor and other rotating machinery in situ, solve the problem that prior art subjective judgment is inaccurate, environmental interference is big.

Description

Technical Field

[0001] This invention belongs to the field of vibration detection technology, and in particular relates to a sensor for testing the vibration and noise of rotating objects. Background Technology

[0002] Rotary electric motors, as core power components in industrial and civilian equipment, directly affect the overall stability and service life of the equipment. Manufacturing defects such as bearing wear, rotor imbalance, and assembly deviations, or wear and tear on components after long-term use, can all lead to abnormal vibrations and noises during operation. Even small noises indicate that the motor is not operating properly. Failure to detect and address these issues promptly can lead to escalating equipment failures, shutdowns, production stoppages, and even safety accidents.

[0003] Existing methods for testing motor vibration and noise have the following drawbacks: First, they rely on subjective human judgment and lack unified testing standards. Differences in auditory sensitivity among different operators lead to inconsistent and inaccurate test results. Second, the use of air-conductive microphones for signal acquisition makes them susceptible to interference from ambient background noise, resulting in a low signal-to-noise ratio. In addition, to avoid environmental interference, some tests need to be conducted in dedicated silent enclosures, which increases equipment costs and complicates the testing process, failing to meet the needs of real-time on-site monitoring.

[0004] Therefore, there is a need for a rotating object vibration and noise testing device that can overcome environmental noise interference, requires no special testing environment, provides accurate test results, and is easy to operate, in order to address the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies in motor vibration and noise testing, such as environmental interference, inaccurate subjective judgment, and reliance on specialized equipment. It provides a contact sensor based on bone conduction technology to achieve accurate acquisition and transmission of vibration and noise signals of rotating objects.

[0006] This utility model achieves the above-mentioned objectives through the following technical solution: it includes a cylindrical outer shell, and an upper cover and a bottom cover installed at both ends of the outer shell. A probe is provided at one end of the outer shell. The probe includes an integrally formed ball head and a connecting rod. The ball head contacts the shell of the object to be tested to receive vibration. A conductive connector is provided at the end of the probe. A shock-absorbing component is provided at the other end of the conductive connector. A guide rod is inserted in the middle of the shock-absorbing component. The guide rod is connected to the conductive connector through a wire harness. The guide rod transmits the vibration signal to an external analysis host through the wire harness.

[0007] Furthermore, a first threaded connector is fixedly provided at the end of the connecting rod away from the ball head.

[0008] Furthermore, the conductive connector includes a hexagonal nut, a columnar connector, and a second threaded connector, and the conductive connector is also integrally formed.

[0009] Furthermore, the columnar connector has built-in signal conversion contacts to convert mechanical vibrations into electrical signals.

[0010] Furthermore, the shock-absorbing assembly includes a pair of threaded washers and an array of columnar shock-absorbing pads disposed between them, wherein the shock-absorbing pads are connected to the threaded washers at both ends by screws.

[0011] Furthermore, the silicone damping pads of the shock-absorbing components absorb vibration interference from the outer casing and the external environment through elastic deformation, preventing noise from mixing into the signal.

[0012] Furthermore, the first threaded connector is screwed into the inside of the hexagonal nut and connected by thread engagement, and the second threaded connector is screwed into the inside of the threaded washer and connected by thread engagement.

[0013] Furthermore, the shock-absorbing component is snapped into the outer shell to achieve an overall fixation effect.

[0014] Beneficial effects: This utility model is reasonably designed and has the following beneficial effects: 1. In this utility model solution, a bone conduction contact acquisition method is adopted, which directly contacts the shell of the object under test through the ball head, avoiding background noise interference caused by air conduction from the signal source. It does not require a dedicated testing environment such as a soundproof box and is suitable for complex industrial sites. 2. In this utility model, the vibration signal is directly transmitted to the guide rod through the probe and the conductive connector. The transmission path is short and the loss is small. Moreover, the shock absorption component can absorb the excess vibration of the outer shell and the external environment, avoid interference signals, and ensure the purity of the signal transmitted to the host. 3. In this utility model, the components are connected by threaded engagement and snap-fit, making assembly and disassembly convenient. The outer shell has a cylindrical structure, which is convenient for hand-held or fixed installation, and can realize rapid on-site testing. 4. The present invention is applicable not only to motors, but also to vibration and noise testing of other rotating machinery such as fans, pumps, and gearboxes, and has strong versatility. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is an exploded view of a partial structure of the present invention; Figure 4 This is a schematic diagram of the probe structure of this utility model; Figure 5 This is a schematic diagram of the conductive connector structure of this utility model; Figure 6 This is an exploded view of the structure of the shock absorption component of this utility model.

[0016] In the diagram: 1-Outer shell, 2-Probe, 3-Conductive connector, 4-Shock absorption assembly, 5-Guide rod; 11-Top cover, 12-Bottom cover, 21-Ball head, 22-Connecting rod, 23-First threaded connector, 31-Hex nut, 32-Columnar connector, 33-Second threaded connector, 41-Threaded washer, 42-Shock-absorbing pad. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Combination Figures 1 to 6 The sensor shown is used to test the vibration and noise of rotating objects. It includes a cylindrical outer shell 1 and an upper cover 11 and a bottom cover 12 installed at both ends of the outer shell 1. A probe 2 is provided at one end of the outer shell 1. The probe 2 includes an integrally formed ball head 21 and a connecting rod 22. The ball head 21 contacts the shell of the object to be tested to receive vibration. A conductive connector 3 is provided at the end of the probe 2. A shock-absorbing component 4 is provided at the other end of the conductive connector 3. A guide rod 5 is inserted in the middle of the shock-absorbing component 4. The guide rod 5 is connected to the conductive connector 3 through a wire harness. The guide rod 5 transmits the vibration signal to an external analysis host through the wire harness.

[0019] The first threaded connector 23 is fixedly provided at the end of the connecting rod 22 away from the ball head 21.

[0020] The conductive connector 3 includes a hexagonal nut 31, a columnar connector 32, and a second threaded connector 33. The conductive connector 3 is also integrally formed.

[0021] The columnar connector 32 has a built-in signal conversion contact for converting mechanical vibrations into electrical signals.

[0022] The shock-absorbing assembly 4 includes a pair of threaded washers 41 and a plurality of columnar shock-absorbing pads 42 arranged in an array between the two. The shock-absorbing pads 42 are connected to the threaded washers 41 at both ends by screws.

[0023] The silicone damping pad 42 of the shock absorption component 4 absorbs vibration interference from the outer shell 1 and the external environment through elastic deformation, thus preventing noise from mixing into the signal.

[0024] The first threaded connector 23 is screwed into the inside of the hexagonal nut 31 and connected by thread engagement; the second threaded connector 33 is screwed into the inside of the threaded washer 41 and connected by thread engagement.

[0025] The shock-absorbing component 4 is snapped into the outer shell 1 to achieve an overall fixation effect.

[0026] Working Principle: During use and testing, the sensor bottom cover 12 is placed close to the rotating object under test, such as a motor housing, ensuring that the ball head 21 of the probe 2 is in close contact with the housing surface without gaps. The vibration generated by the movement of the object under test is transmitted through the housing to the ball head 21, and then sequentially to the connecting rod 22 and the conductive connector 3 via bone conduction, thus realizing the mechanical transmission of the vibration signal. The conductive connector 3 converts the mechanical vibration into an electrical signal through a built-in signal conversion contact, which is then transmitted to the guide rod 5 via a wiring harness. During this process, the silicone damping pad 42 of the damping component 4 absorbs the vibration interference from the outer shell 1 and the external environment through elastic deformation, preventing noise from mixing into the signal. The guide rod 5 transmits the pure electrical signal to the external analysis host. The host uses a signal processing algorithm to convert the vibration signal into corresponding noise data and vibration frequency spectrum, realizing the quantitative analysis of the rotating object's operating state and determining whether there are abnormal noises or potential faults.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sensor for testing the vibration and noise of a rotating object, comprising a cylindrical outer housing (1), and an upper cover (11) and a bottom cover (12) mounted at both ends of the outer housing (1), characterized in that: The outer shell (1) is provided with a probe (2) at one end. The probe (2) includes an integrally formed ball head (21) and a connecting rod (22). The ball head (21) contacts the shell of the object to be tested to receive vibration. The probe (2) is provided with a conductive connector (3) at one end. The conductive connector (3) is provided with a shock-absorbing component (4) at the other end. A guide rod (5) is inserted in the middle of the shock-absorbing component (4). The guide rod (5) is connected to the conductive connector (3) through a wire harness. The guide rod (5) transmits the vibration signal to the external analysis host through the wire harness.

2. A sensor for testing the vibration and noise of a rotating object according to claim 1, characterized in that: The first threaded connector (23) is fixedly provided at the end of the connecting rod (22) away from the ball head (21).

3. A sensor for testing the vibration and noise of a rotating object according to claim 2, characterized in that: The conductive connector (3) includes a hexagonal nut (31), a columnar connector (32), and a second threaded connector (33), and the conductive connector (3) is also integrally formed.

4. A sensor for testing the vibration and noise of a rotating object according to claim 3, characterized in that: The shock-absorbing assembly (4) includes a pair of threaded washers (41) and an array of columnar shock-absorbing pads (42) arranged between the two. The shock-absorbing pads (42) are connected to the threaded washers (41) at both ends by screws.

5. A sensor for testing the vibration and noise of a rotating object according to claim 4, characterized in that: The first threaded connector (23) is screwed into the inside of the hexagonal nut (31) and connected by thread engagement. The second threaded connector (33) is screwed into the inside of the threaded washer (41) and connected by thread engagement.

6. A sensor for testing the vibration and noise of a rotating object according to claim 5, characterized in that: The shock-absorbing component (4) is snapped into the outer shell (1) to achieve an overall fixation effect.

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