Vibration detection device for water-turbine generator set

Abstract

The invention discloses a water-turbine generator set vibration detection device, and relates to the technical field of fault detection devices, the water-turbine generator set vibration detection device comprises a detector main body, an eddy current displacement sensor probe, a low-frequency vibration sensor probe and a mobile device, the eddy current displacement sensor probe and the low-frequency vibration sensor probe are both in signal connection with the detector main body; the moving device is connected to the detector main body, the moving device is provided with a moving part, the eddy current displacement sensor probe can be fixedly connected to the moving part, the moving device can drive the eddy current displacement sensor probe to move relative to the detector main body, and a binding belt is fixedly connected to the low-frequency vibration sensor probe; the distance between the eddy current displacement sensor probe and the to-be-detected equipment can be adjusted according to the amplitude of the to-be-detected equipment, and the low-frequency vibration sensor probe is connected to the to-be-detected equipment through the binding belt, so that the connection between the low-frequency vibration sensor probe and the to-be-detected equipment is firmer, and the water-turbine generator set vibration detection device is better in durability and higher in detection precision.

Description

Technical Field

[0001] The present invention relates to the technical field of fault detection devices, and in particular to a vibration detection device for a hydro-generator set. Background Art

[0002] A hydroelectric generator is a complete set of equipment that converts water energy into electricity. It primarily consists of a turbine and a generator. It utilizes the kinetic or potential energy of the water flow to drive the turbine, which in turn drives the generator to generate electricity. It is a key method of renewable energy generation. Operating hydroelectric generators inevitably experience vibration. When vibration is within acceptable limits, it does not affect the power supply quality, safe operation, or service life of the unit. However, when affected by electrical, mechanical, and hydraulic factors, the unit's vibration may become excessive or even exceed acceptable limits, compromising its safe operation. Therefore, monitoring vibration and swing parameters is necessary to promptly detect any operational anomalies in the hydroelectric generator. The sensors commonly used in existing detection equipment are: eddy current displacement sensors or low-frequency vibration sensors. Eddy current sensors are non-contact detection devices. When measuring, they need to maintain a certain distance from the metal material. If the distance cannot be controlled well, it is easy for the eddy current sensor to collide or rub with the equipment to be tested, causing the eddy current sensor to wear or be damaged, and affecting the accuracy of the detection results; low-frequency vibration sensors are contact detection devices, which are arranged on the unit foundation or bearing seat. When the vibration intensity is too large, they are easy to loosen, thereby affecting their measurement accuracy. Summary of the Invention

[0003] The purpose of the present invention is to provide a vibration detection device for a hydro-generator set to solve the problems existing in the above-mentioned prior art, so that the vibration detection device for a hydro-generator set has better durability and higher detection accuracy.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a vibration detection device for a hydro-generator set, comprising: a detector body, an eddy current displacement sensor probe, a low-frequency vibration sensor probe and a moving device, wherein the eddy current displacement sensor probe and the low-frequency vibration sensor probe are both signal-connected to the detector body, the moving device is connected to the detector body, the moving device has a moving part, the eddy current displacement sensor probe can be fixedly connected to the moving part, the moving device can drive the eddy current displacement sensor probe to move relative to the detector body, and a binding belt is fixedly connected to the low-frequency vibration sensor probe, and the binding belt is used to fix the low-frequency vibration sensor probe to the device to be tested.

[0006] In some embodiments, the moving device includes a driving device and a mounting seat, the driving device includes a first driving device, the fixed part of the first driving device is fixedly connected to the detector body, the mounting seat is fixedly connected to the moving part of the first driving device, the eddy current displacement sensor probe can be detachably connected to the mounting seat, and the first driving device can drive the mounting seat to move in a first direction relative to the detector body.

[0007] In some embodiments, the driving device also includes a second driving device, the fixed part of the second driving device is fixedly connected to the mounting base, and the movable part of the second driving device is provided with a connection port for detachably connecting the eddy current displacement sensor probe, and the second driving device can drive the connection port to approach or move away from the mounting base in a second direction, and the second direction is perpendicular to the first direction.

[0008] In some embodiments, a screw is fixedly connected to the eddy current displacement sensor probe, an internal thread corresponding to the thread of the screw is provided in the connection port, and the screw can be threadedly connected to the connection port.

[0009] In some embodiments, a protective cover is provided on the eddy current displacement sensor probe, and the protective cover can isolate the eddy current displacement sensor probe from rigid contact with the device under test.

[0010] In some embodiments, the protective cover is made of rubber or silicone.

[0011] In some embodiments, the vibration detection device of the hydro-turbine generator set also includes a fixing ring, the inner wall of the fixing ring is provided with a first groove, the low-frequency vibration sensor probe is fixedly connected to a protrusion that can be engaged with the first groove, the binding belt is fixedly connected to the inner wall of the fixing ring, and when the first groove is engaged with the protrusion, the binding belt is located between the fixing ring and the low-frequency vibration sensor probe.

[0012] In some embodiments, the eddy current displacement sensor probe and the low-frequency vibration sensor probe are both detachably connected to the detector body through wiring.

[0013] In some embodiments, a connector is fixedly connected to the detector body, and the wiring can be connected to the detector body signal through the connector. A rubber ring is circumferentially arranged on the end of the connector away from the detector body. When the wiring is plugged into the connector, the rubber ring can fit along the circumference of the wiring to the outer wall of the wiring; the outer wall of the end of the wiring close to the connector is circumferentially provided with a second groove that can be engaged with the rubber ring.

[0014] In some embodiments, a storage plate is fixedly connected to the detector body, the storage plate is arc-shaped and the inner recess is facing the detector body, the first end of the storage plate is fixedly connected to the detector body, the second end of the storage plate has an entry spacing with the detector body, the storage plate is elastic, when the second end is deformed in a direction away from the detector body, the entry spacing is greater than the outer diameter of the wiring, when the second end is reset, the entry spacing is smaller than the outer diameter of the wiring.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The present invention provides a vibration detection device for a hydro-turbine generator set. By fixing an eddy current displacement sensor probe to a moving part, the moving device can drive the eddy current displacement sensor probe to move when it moves relative to a detector main body, thereby adjusting the position of the eddy current displacement sensor probe relative to the device to be tested according to the amplitude of the device to be tested, reducing the probability of collision or friction between the eddy current sensor probe and the device to be tested, improving the durability of the eddy current sensor probe, reducing the impact of collision or friction on the detection structure, and improving the detection accuracy; the low-frequency vibration sensor probe is fixedly connected to the device to be tested by a binding belt, so that the low-frequency vibration sensor probe and the device to be tested are more firmly connected. During the vibration process of the device to be tested, the low-frequency vibration sensor probe can always fit the device to be tested, and the detection result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the structure of a vibration detection device for a hydro-generator set according to some embodiments of the present invention;

[0019] Figure 2 A schematic structural diagram of a hydro-generator vibration detection device according to some embodiments of the present invention from another angle;

[0020] Figure 3 An exploded view of a vibration detection device for a hydro-generator set according to some embodiments of the present invention;

[0021] Figure 4 A side view of a vibration detection device for a hydro-generator set according to some embodiments of the present invention;

[0022] Figure 5A schematic structural diagram of a fixing ring of a vibration detection device for a hydro-generator set according to some embodiments of the present invention;

[0023] In the figure: 1-detector body, 2-eddy current displacement sensor probe, 3-low frequency vibration sensor probe, 4-connection, 5-screw, 6-first drive device, 7-mounting seat, 8-second drive device, 9-connection port, 10-protective cover, 11-bump, 12-fixing ring, 13-binding belt, 14-connector, 15-rubber ring, 16-second groove, 17-card slot, 18-connecting block, 19-third groove, 20-card block, 21-storage plate. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The purpose of the present invention is to provide a vibration detection device for a hydro-generator set to solve the problems existing in the prior art and to make the vibration detection device for a hydro-generator set have better durability and higher detection accuracy.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The present invention provides a vibration detection device for a hydro-generator set, such as Figures 1-2 As shown, it includes: a detector body 1, an eddy current displacement sensor probe 2, a low-frequency vibration sensor probe 3 and a moving device. The eddy current displacement sensor probe 2 and the low-frequency vibration sensor probe 3 are both connected to the detector body 1 by signal. The moving device is connected to the detector body 1. The moving device has a moving part. The eddy current displacement sensor probe 2 can be fixedly connected to the moving part. The moving device can drive the eddy current displacement sensor probe 2 to move relative to the detector body 1. A binding belt 13 is fixedly connected to the low-frequency vibration sensor probe 3. The binding belt 13 is used to fix the low-frequency vibration sensor probe 3 to the device to be tested.

[0028] By fixing the eddy current displacement sensor probe 2 to the moving part, when the moving device moves relative to the detector body 1, the eddy current displacement sensor probe 2 can be driven to move, so that the position of the eddy current displacement sensor probe 2 relative to the device to be tested can be adjusted according to the amplitude of the device to be tested, thereby reducing the probability of collision or friction between the eddy current sensor probe 2 and the device to be tested, improving the durability of the eddy current sensor probe 2, reducing the impact of collision or friction on the detection structure, and improving the detection accuracy, so that it is possible to judge whether the device to be tested has a fault based on the detection result, and the judgment result is more accurate; the low-frequency vibration sensor probe 3 is fixedly connected to the device to be tested by the binding belt 13, so that the low-frequency vibration sensor probe 3 and the device to be tested are more firmly connected, and the low-frequency vibration sensor probe 3 can always fit the device to be tested during the vibration of the device to be tested, and the detection result is more accurate, so that it is possible to judge whether the device to be tested has a fault based on the detection result, and the judgment result is more accurate.

[0029] By connecting the signals of the eddy current displacement sensor probe 2 and the low-frequency vibration sensor probe 3 to the detector body 1, the eddy current displacement sensor probe 2 can detect high-amplitude equipment, and the low-frequency vibration sensor probe 3 can detect low-amplitude equipment, so that the vibration detection device of the hydro-generator set can simultaneously detect high-amplitude and low-amplitude equipment of the hydro-generator set, which is more convenient to use. When in use, the eddy current displacement sensor probe 2 can be used to detect the amplitude of the device to be tested first. If the amplitude of the device to be tested falls within the amplitude range that the preset low-frequency vibration sensor can detect, the low-frequency vibration sensor probe 3 is used to fit the device to be tested for detection. This can avoid the amplitude of the device to be tested being too large to damage the low-frequency vibration sensor probe 3, thereby improving the durability of the vibration detection device of the hydro-generator set.

[0030] In another embodiment of the present embodiment, the moving device includes a driving device and a mounting seat 7, the driving device includes a first driving device 6, the fixed portion of the first driving device 6 is fixedly connected to the detector body 1, the mounting seat 7 is fixedly connected to the moving portion of the first driving device 6, the eddy current displacement sensor probe 2 can be detachably connected to the mounting seat 7, and the first driving device 6 can drive the mounting seat 7 to move in the first direction relative to the detector body 1. When the eddy current displacement sensor probe 2 is detachably connected to the mounting seat 7, the first driving device 6 drives the mounting seat 7 to move in the first direction relative to the detector body 1, which can drive the eddy current displacement sensor probe 2 to move in the first direction relative to the detector body 1, thereby adjusting the distance of the eddy current displacement sensor probe 2 relative to the device to be tested in the first direction, reducing the probability of collision or friction between the device to be tested and the eddy current sensor probe 2 when vibrating along the first direction, improving the durability of the eddy current sensor probe 2, and improving the detection accuracy. Preferably, the first direction can be a horizontal direction.

[0031] In another embodiment of the present embodiment, the driving device further comprises a second driving device 8, the fixed portion of the second driving device 8 is fixedly connected to the mounting seat 7, the movable portion of the second driving device 8 is provided with a connection port 9 for detachably connecting the eddy current displacement sensor probe 2, and the second driving device 8 can drive the connection port 9 to move closer to or away from the mounting seat 7 in a second direction, the second direction being perpendicular to the first direction. When the eddy current displacement sensor probe 2 is detachably connected to the mounting seat 7, the second driving device 8 drives the mounting seat 7 to move relative to the detector body 1 in the second direction, thereby driving the eddy current displacement sensor probe 2 to move relative to the detector body 1 in the second direction, thereby adjusting the distance between the eddy current displacement sensor probe 2 and the device under test in the second direction, thereby reducing the probability of collision or friction between the device under test and the eddy current sensor probe 2 when the device under test vibrates along the second direction, thereby improving the durability of the eddy current sensor probe 2 and improving the detection accuracy. When detection is not required, the eddy current displacement sensor probe 2 can be removed from the movable device to facilitate the storage of the eddy current displacement sensor probe 2. Preferably, the second direction can be a vertical direction.

[0032] In another embodiment of this embodiment, Figure 3 As shown, the eddy current displacement sensor probe 2 is fixedly connected to a screw rod 5, and an internal thread corresponding to the thread of the screw rod 5 is provided in the connection port 9, and the screw rod 5 can be threadedly connected to the connection port 9. The eddy current displacement sensor probe 2 is threadedly connected to the connection port 9, which can improve the stability of the connection and the accuracy of the detection. It is also easy to connect and disassemble and easy to use. When the eddy current displacement sensor probe 2 needs to be threadedly connected to the connection port 9, the eddy current displacement sensor probe 2 is first disconnected from the detector body 1 to avoid entanglement between the eddy current displacement sensor probe 2 and the detector body 1.

[0033] In another embodiment of this invention, a protective cover 10 is provided over the eddy current displacement sensor probe 2. The protective cover 10 isolates the eddy current displacement sensor probe 2 from rigid contact with the device under test. The protective cover 10 effectively prevents direct rigid collision or friction between the eddy current displacement sensor probe 2 and the device under test, reducing mechanical wear and significantly extending the service life of the eddy current displacement sensor probe 2.

[0034] In another embodiment of the present invention, the eddy current displacement sensor probe 2 is provided with a snap-in slot 17 arranged along the circumference of the eddy current displacement sensor probe 2. When the protective cover 10 is mounted on the eddy current displacement sensor probe 2, the connecting block 18 on the protective cover 10 can snap into the snap-in slot 17. This facilitates the removal of the protective cover 10 from the eddy current displacement sensor probe 2.

[0035] In another embodiment of this embodiment, the protective cover 10 is made of rubber or silicone. The protective cover 10 is made of rubber or silicone. Rubber and silicone materials can be easily processed into a suitable protective cover structure through processes such as injection molding and extrusion to better fit the eddy current displacement sensor probe 2. If the eddy current displacement sensor probe 2 and the device under test are subjected to rigid collision or friction, the protective cover 10 is unlikely to fall off, thereby providing better protection.

[0036] It should be noted that, in the vibration detection device for the hydro-generator set provided by the present invention, the material of the protective cover 10 is not limited to the materials in the above embodiment, and the protective cover 10 can also be made of polyurethane, thermoplastic elastomer and other materials.

[0037] In another embodiment of this embodiment, Figures 4-5 As shown, the vibration detection device for the hydro-generator set further includes a fixing ring 12, the inner wall of which is provided with a first groove, a protrusion 11 which can be engaged with the first groove is fixedly connected to the low-frequency vibration sensor probe 3, and a binding band 13 is fixedly connected to the inner wall of the fixing ring 12. When the first groove is engaged with the protrusion 11, the binding band 13 is located between the fixing ring 12 and the low-frequency vibration sensor probe 3. The binding band 13 is located between the fixing ring 12 and the low-frequency vibration sensor probe 3. The clamping and fixing between the fixing ring 12 and the low-frequency vibration sensor probe 3 can provide pressure to the binding band 13, making the connection between the binding band 13 and the fixing ring 12 more secure. In addition, the fixing ring 12 is provided so that when the binding band 13 is used to bundle the low-frequency vibration sensor probe 3 and the device to be tested, the binding band 13 can be wrapped around the fixing ring 12 to improve the fixing effect.

[0038] In another embodiment of the present invention, the eddy current displacement sensor probe 2 and the low-frequency vibration sensor probe 3 are both detachably connected to the detector body 1 via a connection 4. The detachable connection makes replacement and maintenance of the eddy current displacement sensor probe 2 or the low-frequency vibration sensor probe 3 simpler and faster.

[0039] In another embodiment of this embodiment, a connector 14 is fixedly connected to the detector body 1, and the wiring 4 can be connected to the detector body 1 through the connector 14. A rubber ring 15 is arranged circumferentially on the end of the connector 14 away from the detector body 1. When the wiring 4 and the connector 14 are plugged in, the rubber ring 15 can fit the outer wall of the wiring 4 along the circumference of the wiring 4; the outer wall of the end of the wiring 4 close to the connector 14 is circumferentially provided with a second groove 16 that can engage with the rubber ring 15. When the wiring 4 and the connector 14 are plugged in, the rubber ring 15 can fit the outer wall of the wiring 4 along the circumference of the wiring 4 and engage with the second groove 16, making the plugging of the wiring 4 and the connector 14 more secure, effectively preventing the wiring 4 from falling off the connector 14 during the detection process, thereby affecting the detection efficiency.

[0040] In another embodiment of this embodiment, the fixing ring 12 includes two semicircular fixing segments, a first fixing segment and a second fixing segment. One of the first fixing segment and the second fixing segment is provided with a third groove 19, and the other is provided with a snap-fit block 20 that can snap into the third groove 19. This makes the fixing ring 12 easy to disassemble and install.

[0041] In another embodiment of the present invention, a receiving plate 21 is fixedly connected to the detector body 1. The receiving plate 21 is arc-shaped, with an inner recess facing the detector body 1. The first end of the receiving plate 21 is fixedly connected to the detector body 1, and the second end of the receiving plate 21 has an entry gap with the detector body 1. The receiving plate 21 is elastic. When the second end is deformed in a direction away from the detector body 1, the entry gap is greater than the outer diameter of the wire 4. When the second end is reset, the entry gap is less than the outer diameter of the wire 4. The second end of the receiving plate 21 is lifted away from the detector body 1, causing the second end to deform in a direction away from the detector body 1 and the entry gap to be greater than the outer diameter of the wire 4. The wire 4 can be placed under the inner recess of the receiving plate 21. Then, the second end of the receiving plate 21 is released, and the second end of the receiving plate 21 is reset. The entry gap is less than the outer diameter of the wire 4, thereby confining the wire 4 to the inner recess of the receiving plate 21, thereby storing the wire 4 and facilitating its use.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A vibration detection device for a hydro-generator set, characterized in that: include: A detector body (1), an eddy current displacement sensor probe (2), a low-frequency vibration sensor probe (3) and a moving device, wherein the eddy current displacement sensor probe (2) and the low-frequency vibration sensor probe (3) are both signal-connected to the detector body (1), the moving device is connected to the detector body (1), the moving device has a moving part, the eddy current displacement sensor probe (2) can be fixedly connected to the moving part, the moving device can drive the eddy current displacement sensor probe (2) to move relative to the detector body (1), and a binding belt (13) is fixedly connected to the low-frequency vibration sensor probe (3), and the binding belt (13) is used to fix the low-frequency vibration sensor probe (3) to the device to be tested.

2. The vibration detection device for a hydro-generator set according to claim 1, characterized in that: The moving device comprises a driving device and a mounting seat (7), the driving device comprises a first driving device (6), the fixed portion of the first driving device (6) is fixedly connected to the detector body (1), the mounting seat (7) is fixedly connected to the moving portion of the first driving device (6), the eddy current displacement sensor probe (2) can be detachably connected to the mounting seat (7), and the first driving device (6) can drive the mounting seat (7) to move in a first direction relative to the detector body (1).

3. The vibration detection device for a hydro-generator set according to claim 2, characterized in that: The driving device further comprises a second driving device (8), a fixed portion of the second driving device (8) being fixedly connected to the mounting seat (7), a movable portion of the second driving device (8) being provided with a connecting port (9) for detachably connecting the eddy current displacement sensor probe (2), and the second driving device (8) being capable of driving the connecting port (9) to move closer to or away from the mounting seat (7) in a second direction, the second direction being perpendicular to the first direction.

4. The vibration detection device for a hydro-generator set according to claim 3, characterized in that: A screw rod (5) is fixedly connected to the eddy current displacement sensor probe (2); an internal thread corresponding to the thread of the screw rod (5) is provided in the connection port (9); and the screw rod (5) can be threadedly connected to the connection port (9).

5. The vibration detection device for a hydro-generator set according to claim 1, characterized in that: The eddy current displacement sensor probe (2) is covered with a protective cover (10), and the protective cover (10) can isolate the rigid contact between the eddy current displacement sensor probe (2) and the device to be tested.

6. The vibration detection device for a hydro-generator set according to claim 5, characterized in that: The protective cover (10) is made of rubber or silicone.

7. The vibration detection device for a hydro-generator set according to claim 1, characterized in that: The invention also includes a fixing ring (12), wherein a first groove is provided on the inner wall of the fixing ring (12), a protrusion (11) capable of engaging with the first groove is fixedly connected to the low-frequency vibration sensor probe (3), and the binding belt (13) is fixedly connected to the inner wall of the fixing ring (12), and when the first groove is engaged with the protrusion (11), the binding belt (13) is located between the fixing ring (12) and the low-frequency vibration sensor probe (3).

8. The vibration detection device for a hydro-generator set according to claim 1, characterized in that: The eddy current displacement sensor probe (2) and the low-frequency vibration sensor probe (3) are both detachably connected to the detector body (1) via wiring (4).

9. The vibration detection device for a hydro-generator set according to claim 8, characterized in that: A connector (14) is fixedly connected to the detector body (1), and the wiring (4) can be connected to the detector body (1) through the connector (14) for signal connection. A rubber ring (15) is circumferentially arranged at one end of the connector (14) away from the detector body (1). When the wiring (4) is plugged into the connector (14), the rubber ring (15) can be attached to the outer wall of the wiring (4) along the circumference of the wiring (4); a second groove (16) capable of being engaged with the rubber ring (15) is circumferentially arranged on the outer wall of the wiring (4) at one end of the wiring (4) close to the connector (14).

10. The vibration detection device for a hydro-generator set according to claim 8, characterized in that: A receiving plate (21) is fixedly connected to the detector body (1), the receiving plate (21) is arc-shaped and the inner concave portion faces the detector body (1), the first end of the receiving plate (21) is fixedly connected to the detector body (1), the second end of the receiving plate (21) has an entry spacing with the detector body (1), and the receiving plate (21) is elastic. When the second end is deformed in a direction away from the detector body (1), the entry spacing is greater than the outer diameter of the wiring (4), and when the second end is reset, the entry spacing is smaller than the outer diameter of the wiring (4).

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