Generator shaft voltage monitor

Abstract

The utility model relates to the technical field of voltage monitoring, and discloses a generator shaft voltage monitor, comprising a generator housing, a rear cover and a rotor, the inner side of the generator housing is fixedly connected with a stator, the interior of the rotor is fixedly connected with a rotating shaft, and a shielding cover is fixedly connected between the generator housing and the rear cover. Probes are arranged on the front side and the rear side of the interior of the shielding cover, threaded walls are arranged on the outer portions of the two probes, and anti-loose gaskets are fixedly connected to the sides, away from each other, of the outer portions of the two probes. According to the utility model, external electromagnetic interference is blocked through the shielding cover, and the two probes are used for acquiring shaft voltage data and transmitting the shaft voltage data to the oscilloscope for display, so that the effect of accurately monitoring the shaft voltage of the generator in real time is realized, the magnitude and variation trend of the shaft voltage can be mastered in time, abnormity can be found in advance, and bearing damage or insulation breakdown caused by overhigh shaft voltage is avoided; continuous and stable operation of the generator is guaranteed and generating efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of voltage monitoring technology, and in particular to a generator shaft voltage monitor. Background Technology

[0002] A generator is a device that converts other forms of energy into electrical energy. From a macro perspective, generators are widely used in various power plants and nuclear power plants to provide electricity for social production and people's daily lives. In the industrial field, generators provide power support for various mechanical equipment in factories. In commercial places, they ensure the normal operation of lighting, air conditioning and various electrical appliances. In residential life, they meet the electricity needs of households and are an important infrastructure for maintaining the normal operation of society.

[0003] Currently, traditional monitoring equipment uses simple voltage sensing devices to detect generator shaft voltage, which can obtain approximate data on shaft voltage to a certain extent, avoiding the problem of being completely unable to know the shaft voltage situation, and providing some basis for judging the generator's operating status.

[0004] However, the sensing devices of traditional monitoring equipment have limited accuracy. During operation, the equipment vibrates and there are many interference signals from external devices, making it difficult to monitor the generator shaft voltage in real time and accurately. The sensing elements are slow to react and cannot capture minute changes in the shaft voltage in time. As a result, operators cannot accurately grasp the magnitude and trend of the shaft voltage. When abnormal fluctuations occur in the shaft voltage, potential risks cannot be detected in advance. Excessive shaft voltage can cause the lubricating oil film of the generator bearing to break down, resulting in bearing wear or even damage. It can also damage the insulation layer of the generator, causing insulation breakdown faults. This not only leads to generator shutdown for maintenance, increasing equipment maintenance costs, but also affects power generation efficiency and causes power supply interruptions. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a generator shaft voltage monitor, which aims to improve the problem that existing technologies are prone to vibration during operation and have a lot of interference signals from external devices, making it difficult to monitor the generator shaft voltage in real time and accurately.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a generator shaft voltage monitor, comprising a generator housing, a rear cover, and a rotor. A stator is fixedly connected to the inner side of the generator housing, and a rotating shaft is fixedly connected to the inside of the rotor. A shield is fixedly connected between the generator housing and the rear cover. Probes are provided on both the front and rear sides of the inner side of the shield. Threaded walls are provided on the outer sides of both probes. Anti-loosening gaskets are fixedly connected to the outer sides of the two probes that are far apart from each other. An oscilloscope is fixedly connected to the bottom front side of the generator housing. Both probes are electrically connected to the oscilloscope. A vibration damping mechanism is provided at the bottom of the generator housing.

[0007] As a further description of the above technical solution:

[0008] The damping mechanism includes two connectors, which are fixedly connected to the bottom front and rear sides of the generator housing, respectively. Rubber pads are fixedly connected to the bottom of each connector, and anti-slip fixing plates are fixedly connected to the bottom of each rubber pad. Hidden grooves are provided on the top left and right sides of each connector, and fastening bolts pass through the interior of each hidden groove. Damping pads are fixedly connected to the top of the outer side of each fastening bolt.

[0009] As a further description of the above technical solution:

[0010] Multiple control buttons are fixedly connected to the center of the front side of the generator housing, and all of the control buttons are electrically connected to an oscilloscope.

[0011] As a further description of the above technical solution:

[0012] A working indicator light is fixedly connected to the top left side of the generator housing, and the working indicator light is electrically connected to an oscilloscope.

[0013] As a further description of the above technical solution:

[0014] Multiple anti-slip grooves are provided on the outer sides of the two probes at opposite ends, and all of the anti-slip grooves are arc-shaped.

[0015] As a further description of the above technical solution:

[0016] Each of the fastening bolts has an internal hexagonal groove at its top, and each of the internal hexagonal grooves has a quincunx groove at its inner bottom.

[0017] As a further description of the above technical solution:

[0018] Both of the anti-slip fixing plates have anti-slip teeth on their bottoms, and the anti-slip teeth are designed to be wear-resistant.

[0019] As a further description of the above technical solution:

[0020] All of the fastening bolts are symmetrically designed, and the exterior of all of the fastening bolts is rounded.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, external electromagnetic interference is blocked by a shielding cover, and two probes are used to collect shaft voltage data and transmit it to an oscilloscope for display. This achieves the effect of real-time and accurate monitoring of generator shaft voltage, enabling timely understanding of the magnitude and trend of shaft voltage changes, early detection of abnormalities, and prevention of bearing damage or insulation breakdown caused by excessive shaft voltage. This ensures continuous and stable operation of the generator, reduces equipment maintenance costs, and improves power generation efficiency.

[0023] 2. In this utility model, the rubber pad absorbs vibration energy, the anti-slip fixing plate prevents slipping and disperses reaction force, and the shock-absorbing pad buffers and reduces vibration transmission and noise, thus achieving a significant reduction in generator operation vibration. This not only ensures the stability of generator operation and reduces displacement and component damage caused by vibration, but also avoids damage to the support surface, optimizes the operating environment, extends service life, and improves equipment reliability. Attached Figure Description

[0024] Figure 1 This is a perspective view of a generator shaft voltage monitor proposed in this utility model;

[0025] Figure 2 This is a front view of a generator shaft voltage monitor proposed in this utility model;

[0026] Figure 3 This is a cross-sectional view of a generator shaft voltage monitor proposed in this utility model;

[0027] Figure 4 This is a structural exploded view of the damping mechanism in a generator shaft voltage monitor proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the bottom structure of the anti-slip fixing plate in a generator shaft voltage monitor proposed in this utility model.

[0029] Legend:

[0030] 1. Generator housing; 2. Vibration damping mechanism; 201. Connector; 202. Rubber pad; 203. Anti-slip fixing plate; 204. Hidden groove; 205. Fastening bolt; 206. Vibration damping pad; 207. Anti-slip teeth; 3. Rear cover; 4. Stator; 5. Rotor; 6. Shaft; 7. Shielding cover; 8. Probe; 9. Threaded wall; 10. Anti-loosening washer; 11. Oscilloscope; 12. Control button; 13. Working indicator light; 14. Anti-slip groove; 15. Socket hexagonal groove; 16. Torx groove. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model provides a generator shaft voltage monitor, including a generator housing 1, a rear cover 3, and a rotor 5. A stator 4 is fixedly connected to the inner side of the generator housing 1, and a rotating shaft 6 is fixedly connected to the inside of the rotor 5. A shield 7 is fixedly connected between the generator housing 1 and the rear cover 3. Probes 8 are provided on both the front and rear sides of the inside of the shield 7. Threaded walls 9 are provided on the outside of both probes 8. Anti-loosening gaskets 10 are fixedly connected to the outer sides of the two probes 8 that are far apart from each other. An oscilloscope 11 is fixedly connected to the bottom front side of the generator housing 1. Both probes 8 are electrically connected to the oscilloscope 11. A shock-absorbing mechanism 2 is provided at the bottom of the generator housing 1.

[0033] Specifically, during generator operation, the generator housing 1 protects the internal components and provides a mounting base for each component. The stator 4, fixedly connected inside, generates a rotating magnetic field when the generator is energized. The rotor 5, fixedly connected inside, rotates with the generator. Under the influence of the rotating magnetic field generated by the stator 4, the rotor 5 rotates in accordance with the changes in the magnetic field, thereby driving the rotor 6 to rotate synchronously. The shielding cover 7, fixedly connected between the generator housing 1 and the rear cover 3, primarily shields against external interference. In the complex electromagnetic environment of generator operation, the shielding cover 7 can block stray electromagnetic signals from entering the monitoring area, ensuring the accuracy of the monitoring data. Two probes 8, located on the front and rear sides inside the shielding cover 7, are crucial for monitoring the generator shaft voltage. The threaded walls 9 on the outside of the probes 8 facilitate installation of the probes 8 onto the shielding cover 7. The threaded connection ensures the stability of the probe installation. The probes 8 are located far apart from each other on the outside. The anti-loosening pad 10 fixedly connected on one side further prevents the probe 8 from loosening due to vibration during equipment operation, ensuring that the probe 8 is always in the correct monitoring position. The two probes 8 are used to collect generator shaft voltage data. Since the shaft voltage is generated on the rotating shaft 6 when the generator is running, the probe 8 can sense the change in electric field around the rotating shaft 6 and convert it into an electrical signal, which is then transmitted to the oscilloscope 11 fixedly connected to the bottom front side of the generator housing 1. The oscilloscope 11 is electrically connected to both probes 8, receives the electrical signals from the probes 8, and converts them into intuitive waveforms and data. By observing the waveforms and data displayed on the oscilloscope 11, the operator can understand the magnitude and trend of the generator shaft voltage in real time. Once the shaft voltage fluctuates abnormally or exceeds the normal range, the operator can detect it in time and take corresponding measures to avoid generator bearing damage, insulation breakdown and other faults caused by excessive shaft voltage, thereby ensuring the stable operation of the generator.

[0034] Reference Figure 1 , Figure 2 and Figure 4 The shock absorption mechanism 2 includes two connectors 201, which are fixedly connected to the bottom front and rear sides of the generator housing 1 respectively. Rubber pads 202 are fixedly connected to the bottom of each connector 201, and anti-slip fixing plates 203 are fixedly connected to the bottom of each rubber pad 202. Hidden grooves 204 are provided on the top left and right sides of each connector 201. Fastening bolts 205 pass through the interior of each hidden groove 204, and shock absorption pads 206 are fixedly connected to the top of the outer side of each fastening bolt 205.

[0035] Specifically, the damping mechanism 2 ensures stable operation of the generator during operation. Two connecting parts 201 are fixed to the front and rear sides of the bottom of the generator housing 1, serving as both connectors and supports, transferring the generator's weight to the components below. The rubber pad 202 fixedly connected to the bottom of the connecting parts 201 has good elasticity. When the generator vibrates during operation, the rubber pad 202 undergoes elastic deformation, absorbing the vibration energy and converting it into elastic potential energy, thus reducing the amplitude of vibration transmitted to the ground or other supporting structures. The anti-slip fixing plate 203 fixedly connected to the bottom of the rubber pad 202 has two important functions: firstly, it increases the friction between the rubber pad and the supporting surface, preventing displacement of the generator due to vibration during operation and ensuring the generator's position is fixed; secondly, the anti-slip fixing plate 203 can evenly distribute the reaction force after the rubber pad 202 absorbs vibration. To prevent damage to the support surface or generator tilting due to excessive local stress, the hidden grooves 204 on the top left and right sides of the connector 201 provide installation space for the fastening bolts 205. The fastening bolts 205 pass through the hidden grooves 204, which further fix the generator housing 1 and the connector 201, preventing them from loosening during vibration and ensuring the stability of the entire damping mechanism 2. When the generator vibrates, the damping pads 206 fixedly connected to the top of the outer side of the fastening bolts 205 will act as a buffer between the fastening bolts 205 and the generator housing 1, reducing the vibration transmitted from the fastening bolts 205 to the generator housing 1 and preventing damage to the connection between the generator housing 1 and the fastening bolts 205 due to vibration. At the same time, the damping pads 206 can also prevent the fastening bolts 205 from generating noise due to friction during vibration, further optimizing the generator's operating environment and effectively reducing the vibration generated during generator operation.

[0036] Reference Figure 1 , Figure 3 and Figure 5 Multiple control buttons 12 are fixedly connected to the center of the front side of the generator housing 1, and all control buttons 12 are electrically connected to the oscilloscope 11; a working indicator light 13 is fixedly connected to the top left side of the generator housing 1, and the working indicator light 13 is electrically connected to the oscilloscope 11; multiple anti-slip grooves 14 are provided on the outer sides of the two probes 8 at opposite ends, and the multiple anti-slip grooves 14 are all arc-shaped; the top of the multiple fastening bolts 205 is provided with an internal hexagonal groove 15, and the bottom of the inner side of the multiple internal hexagonal grooves 15 is provided with a plum blossom groove 16; the bottom of the two anti-slip fixing plates 203 is provided with anti-slip teeth 207, and the anti-slip teeth 207 are all wear-resistant; the multiple fastening bolts 205 are all symmetrically designed, and the outer side of the multiple fastening bolts 205 is all rounded;

[0037] Specifically, multiple control buttons 12 fixedly connected to the center of the front side of the generator housing 1 are electrically connected to the oscilloscope 11. The control buttons 12 are the interface for the operator to interact with the oscilloscope 11. When it is necessary to adjust the parameters of the oscilloscope 11, the operator presses the corresponding control button 12, and the control button 12 transmits an electrical signal to the oscilloscope 11. After receiving the signal, the oscilloscope 11 changes its display mode and measurement range according to the preset program, making it easier for the operator to observe the generator shaft voltage data more clearly and accurately. The working indicator light 13 fixedly connected to the top left side of the generator housing 1 is also electrically connected to the oscilloscope 11. The working indicator light 13 is used to provide feedback on the working status of the monitor. When the oscilloscope 11 normally receives and processes the signal transmitted from the probe 8, it sends an electrical signal to the working indicator light 13, causing the indicator light 13 to light up, indicating that the monitor is in normal working condition. If the signal transmission from the probe 8 is interrupted or there is an internal malfunction in the oscilloscope 11, the working indicator light 13 will turn off or change its display status, reminding the operator to check and repair it in time. Multiple arc-shaped anti-slip grooves 14 are provided on the outer sides of the two probes 8 at opposite ends. When installing and maintaining the probes 8, the anti-slip grooves 14 increase the friction between the fingers and the probes 8, making them more slip-resistant. The design allows workers to grip the probe 8 more securely, facilitating rotation for installation or removal and preventing slippage. The multiple fastening bolts 205 feature internal hexagonal slots 15 at the top and Torx slots 16 at the bottom to facilitate installation and removal with different types of tools. An internal hexagonal wrench can be inserted into the slot 15, while a Torx wrench can be fitted into the slot 16, increasing operational flexibility and allowing for selection of the appropriate tool to improve work efficiency. The wear-resistant anti-slip teeth 207 at the bottom of the two anti-slip fixing plates 203 enhance the anti-slip properties. The friction between the fixed plate 203 and the supporting surface ensures that even if vibration occurs during generator operation, the anti-slip teeth 207 can still grip the supporting surface to prevent generator displacement. At the same time, the wear-resistant design ensures that the anti-slip teeth 207 are not easily worn during long-term use and maintain good anti-slip performance. Multiple fastening bolts 205 with symmetrical design and smooth outer surface ensure uniform force on the connection between the generator housing 1 and the connecting part 201, making the connection more stable. The smooth outer surface design prevents the fastening bolts 205 from scratching operators or other parts during installation and maintenance, improving the safety and convenience of operation.

[0038] Working Principle: When the generator is powered on, the stator 4, fixedly connected to the inner side of the generator housing 1, generates a rotating magnetic field. The rotating shaft 6, fixedly connected inside the rotor 5, rotates with the generator. Under the influence of the rotating magnetic field generated by the stator 4, the rotor 5 rotates in accordance with the change in the magnetic field, thereby driving the rotating shaft 6 to rotate synchronously. The shielding cover 7, fixedly connected between the generator housing 1 and the rear cover 3, mainly functions to shield external interference. In the complex electromagnetic environment of generator operation, the shielding cover 7 can block stray electromagnetic signals from entering the monitoring area, ensuring the accuracy of the monitoring data. The two probes 8 set on the front and rear sides inside the shielding cover 7 are crucial for monitoring the generator shaft voltage. The threaded walls 9 on the outside of the probes 8 facilitate the insertion of… The probe 8 is mounted on the shield 7 and is connected by threads to ensure the stability of the probe 8. The anti-loosening gasket 10 is fixedly connected to the outside of the probe 8 on the side away from the device to further prevent the probe 8 from loosening due to vibration during equipment operation and ensure that the probe 8 is always in the correct monitoring position. The two probes 8 are used to collect generator shaft voltage data. Since the shaft voltage is generated on the rotating shaft 6 when the generator is running, the probe 8 can sense the change in electric field around the rotating shaft 6 and convert it into an electrical signal, which is then transmitted to the oscilloscope 11 fixedly connected to the bottom front side of the generator housing 1. The oscilloscope 11 is electrically connected to both probes 8, receives the electrical signals from the probes 8, and converts them into intuitive waveforms and data for display.

[0039] Furthermore, the two connectors 201 are fixed to the front and rear sides of the bottom of the generator housing 1, respectively, serving as a connection and support to transfer the weight of the generator to the components below. The rubber pad 202 fixedly connected to the bottom of the connector 201 has good elasticity. When the generator vibrates during operation, the rubber pad 202 will undergo elastic deformation. This deformation can absorb the energy of the vibration, converting the vibration generated by the generator into the elastic potential energy of the rubber pad 202, thereby reducing the amplitude of vibration transmitted to the ground or other supporting structures. The anti-slip fixing plate 203 fixedly connected to the bottom of the rubber pad 202 has two important functions. On the one hand, it increases the friction between the rubber pad and the supporting surface, preventing the generator from shifting due to vibration during operation and ensuring the generator's position is fixed. On the other hand, the anti-slip fixing plate 203 can prevent the rubber pad from shifting due to vibration during operation. The pad 202 absorbs the reaction force after vibration and distributes it evenly to the support surface, avoiding damage to the support surface or causing the generator to tilt due to excessive local stress. The hidden grooves 204 on the top left and right sides of the connector 201 provide installation space for the fastening bolts 205. The fastening bolts 205 pass through the hidden grooves 204, and their function is to further fix the generator housing 1 and the connector 201, preventing them from loosening during vibration and ensuring the stability of the entire damping mechanism 2. When the generator vibrates, the damping pad 206 fixedly connected to the top of the outer side of the fastening bolt 205 will play a buffering role between the fastening bolt 205 and the generator housing 1, which can reduce the vibration transmitted from the fastening bolt 205 to the generator housing 1 and avoid damage to the connection between the generator housing 1 and the fastening bolt 205 due to vibration.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A generator shaft voltage monitor, comprising a generator housing (1), a rear cover (3), and a rotor (5), characterized in that: A stator (4) is fixedly connected to the inside of the generator housing (1), a rotating shaft (6) is fixedly connected to the inside of the rotor (5), a shield (7) is fixedly connected between the generator housing (1) and the rear cover (3), a probe (8) is provided on both the front and rear sides of the shield (7), a threaded wall (9) is provided on the outside of both probes (8), and anti-loosening gaskets (10) are fixedly connected on the opposite side of the outside of both probes (8), an oscilloscope (11) is fixedly connected to the bottom front side of the generator housing (1), both probes (8) are electrically connected to the oscilloscope (11), and a shock-absorbing mechanism (2) is provided at the bottom of the generator housing (1).

2. The generator shaft voltage monitor according to claim 1, characterized in that: The damping mechanism (2) includes two connectors (201). The two connectors (201) are fixedly connected to the bottom front and rear sides of the generator housing (1). Rubber pads (202) are fixedly connected to the bottom of the two connectors (201). Anti-slip fixing plates (203) are fixedly connected to the bottom of the two rubber pads (202). Hidden grooves (204) are opened on the top left and right sides of the two connectors (201). Fastening bolts (205) pass through the interior of the hidden grooves (204). Damping pads (206) are fixedly connected to the top of the outer side of the fastening bolts (205).

3. The generator shaft voltage monitor according to claim 1, characterized in that: Multiple control buttons (12) are fixedly connected to the front center of the generator housing (1), and all of the multiple control buttons (12) are electrically connected to the oscilloscope (11).

4. A generator shaft voltage monitor according to claim 1, characterized in that: A working indicator light (13) is fixedly connected to the top left side of the generator housing (1), and the working indicator light (13) is electrically connected to the oscilloscope (11).

5. A generator shaft voltage monitor according to claim 1, characterized in that: Multiple anti-slip grooves (14) are provided on the outer sides of the two probes (8) at opposite ends, and the multiple anti-slip grooves (14) are all arc-shaped.

6. A generator shaft voltage monitor according to claim 2, characterized in that: The top of each of the multiple fastening bolts (205) is provided with an internal hexagonal groove (15), and the bottom of the inner side of each of the multiple internal hexagonal grooves (15) is provided with a quincunx groove (16).

7. A generator shaft voltage monitor according to claim 2, characterized in that: The bottom of both anti-slip fixing plates (203) is provided with anti-slip teeth (207), and the anti-slip teeth (207) are all designed to be wear-resistant.

8. A generator shaft voltage monitor according to claim 2, characterized in that: The plurality of fastening bolts (205) are symmetrically designed and the exterior of the plurality of fastening bolts (205) is rounded.

Images