Adsorption mechanism and testing device for shaft voltage of generator in thermal power plant

Abstract

The invention discloses an adsorption mechanism, and relates to the field of generators. The first adsorption rubber is arranged on the magnet and used for blocking a current loop; the two second adsorption rubbers are arranged at the two ends of the first adsorption rubber and used for increasing the adsorption range of the first adsorption rubber; and through the first adsorption rubber and the second adsorption rubber, the magnetic field of the generator body is prevented from being interfered by magnetic attraction when the magnet is adsorbed on the motor. The magnet is supported through deformation of the first adsorption rubber, so that pressing of the magnet is more stable and firmer, and manual pressing is avoided. When the sliding plate moves downwards, the pushing plate is pressed on the second adsorption rubber, so that the second adsorption rubber is stably adsorbed on the generator shell, and meanwhile, the pushing plate is always pressed on the second adsorption rubber, so that the magnet and the first adsorption rubber are further fixed, and meanwhile, the device can also adapt to different generator surface shapes; and the installation is more stable.

Description

Technical Field

[0001] The present invention relates to the field of generators, in particular to an adsorption mechanism. Background Art

[0002] During the operation of thermal power plant generators, shaft voltage is generated on the rotating shaft due to factors such as magnetic circuit asymmetry and electrostatic induction. If the shaft voltage is too high, it may break through the bearing oil film, triggering shaft currents and causing equipment damage. Currently, the industry generally uses manual handheld carbon brushes or copper braids to directly contact the rotating shaft for measurement. This has the following significant drawbacks: 1. Significant safety hazards: Operators need to come into close contact with the high-speed rotating generator shaft (usually rotating at 3000 rpm), which poses the risk of being drawn into the equipment or receiving an electric shock; 2. Poor measurement stability: Handheld carbon brushes or copper braids are easily affected by vibration, resulting in uneven contact pressure between the carbon brush and the shaft surface, and large fluctuations in measurement data; 3. Low operational efficiency: The collaborative operation requires multiple people (two people to fix the carbon brushes, one person to record the data), and continuous monitoring is impossible; 4. Insufficient equipment compatibility: Traditional fixing brackets rely on bolt installation, making it difficult to adapt to the curved surface structure of the casing of different types of generators and time-consuming to disassemble. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to solve the technical problem that the existing device cannot be quickly installed and is not compatible with multiple models, and the installation risk is relatively high.

[0004] The above technical problem is solved by the following technical solution: The present invention proposes an adsorption mechanism, which includes a magnet.

[0005] The first adsorption rubber is arranged on the magnet to block the current loop.

[0006] The two second adsorption rubbers are arranged at both ends of the first adsorption rubber for increasing the adsorption range of the first adsorption rubber.

[0007] The first adsorption rubber and the second adsorption rubber can prevent the magnet from magnetically interfering with the magnetic field of the generator body when the magnet is adsorbed on the motor.

[0008] In a preferred embodiment of the adsorption mechanism of the present invention: the bottom surface of the first adsorption rubber is provided with a serrated groove.

[0009] In a preferred embodiment of the adsorption mechanism of the present invention: the bottom surface of the second adsorption rubber is provided with an adsorption blind hole.

[0010] In a preferred embodiment of the adsorption mechanism of the present invention, it further includes a mounting block and an exhaust assembly.

[0011] A mounting groove for mounting the magnet is provided on the bottom surface of the mounting block.

[0012] The exhaust assembly includes a push plate, a rolling shaft movably arranged on the bottom surface of the push plate, and a torsion spring arranged on the upper end surface of the push plate. The upper end surface of the push plate is movably provided with a sliding assembly slidably connected to the mounting block, and the sliding assembly is connected to the torsion spring.

[0013] In a preferred embodiment of the adsorption mechanism of the present invention: it also includes a sliding component, the sliding component includes a sliding plate slidably arranged on the mounting block, and an inclined plate arranged on the sliding plate, the mounting block is provided with a sliding groove for installing the sliding plate, the push plate is provided with a first mounting groove for installing the torsion spring, and the inclined plate is provided with a second mounting groove for installing the torsion spring.

[0014] In a preferred embodiment of the adsorption mechanism of the present invention, the angle between the inclined plate and the sliding plate is an acute angle, and when the torsion spring is normally installed, the distance between the push plate and the side surface of the mounting block gradually increases from top to bottom.

[0015] In a preferred embodiment of the adsorption mechanism of the present invention, it further comprises a fixing rod, and the inclined plate is provided with an open groove for installing the fixing rod.

[0016] In a preferred embodiment of the adsorption mechanism of the present invention: a limiting protrusion is provided on the side surface of the sliding plate, and a limiting groove for clamping the limiting protrusion is provided on the inner wall of the sliding groove.

[0017] In order to solve the above technical problems, the present invention further proposes a test device for the shaft voltage of a thermal power plant generator, which also includes a degree of freedom adjustment rod, and the degree of freedom adjustment rod is installed on the mounting block.

[0018] A carbon brush assembly comprises a constant pressure spring arranged on the degree of freedom adjustment rod and a carbon brush arranged on the constant pressure spring.

[0019] A compression test cable is installed on the carbon brush.

[0020] In a preferred embodiment of the test device for the shaft voltage of a thermal power plant generator according to the present invention, a filter module is provided at the end of the compression test cable to suppress high-frequency interference.

[0021] The beneficial effects of the present invention are that the deformation of the first adsorption rubber supports the magnet, making the magnet's compression more stable and secure. When the sliding plate moves downward, the push plate presses against the second adsorption rubber, simultaneously discharging air between the second adsorption rubber and the generator, allowing the second adsorption rubber to be stably adsorbed on the generator housing. The push plate also maintains constant pressure on the second adsorption rubber, further securing the magnet and the first adsorption rubber. The system can also adapt to different generator surface shapes, providing more stable installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0023] Figure 1 The figure shows the overall structure of the adsorption mechanism in the present invention;

[0024] Figure 2 Shows the installation structure of the adsorption mechanism in the present invention Figure 1 ;

[0025] Figure 3 Shows the installation structure of the adsorption mechanism in the present invention Figure 2 ;

[0026] Figure 4 Shows a schematic structural diagram of the mounting block in the present invention;

[0027] Figure 5 Shows a schematic diagram of the installation structure of the exhaust assembly in the present invention;

[0028] Figure 6 The figure shows a schematic structural diagram of a test device for the shaft voltage of a generator in a thermal power plant according to the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0030] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0031] Reference Figure 1 and Figure 3 As shown, this embodiment provides an adsorption mechanism, including an adsorption magnet 3.

[0032] The first adsorption rubber 1 is disposed on the magnet to block the current loop.

[0033] The two second adsorption rubbers 2 are disposed at both ends of the first adsorption rubber 1 to increase the adsorption range of the first adsorption rubber 1 .

[0034] The first adsorption rubber 1 and the second adsorption rubber 2 enable the magnet 3 to prevent magnetic attraction from interfering with the magnetic field of the generator body when it is adsorbed on the motor; and in the installed state, the magnet 3 presses the first adsorption rubber 1 on the generator body. The first adsorption rubber 1 is 2 mm thick and made of rubber, which blocks the current loop and prevents magnetic attraction from interfering with the magnetic field of the generator body; at the same time, the two second adsorption rubbers 2 are set, and the installation of the first adsorption rubber 1 and the magnet 3 can be made more stable by pressing the two second adsorption rubbers 2, and the two second adsorption rubbers 2 can adapt to the flat or curved surface of the generator surface. Even if installed on the curved surface, the deformation of the first adsorption rubber 1 itself and the fixation of the two second adsorption rubbers 2 can make the pressing and adsorption of the magnet 3 more stable; by setting the two second adsorption rubbers 2, the second adsorption rubber 2 can be pulled so that there is a gap between the first adsorption rubber 1 and the surface of the generator, which facilitates the removal of the magnet 3 from the surface of the generator.

[0035] like Figure 3 As shown, the bottom surface of the first adsorption rubber 1 is provided with a sawtooth groove 11. The magnet 3 presses the first adsorption rubber 1 against the generator body, causing the first adsorption rubber 1 to deform and the sawtooth groove 11 to fit tightly against the generator surface, increasing the contact area and improving adsorption stability.

[0036] like Figure 3 As shown, the bottom surface of the second adsorption rubber 2 is provided with an adsorption blind hole 21. Pressing the second adsorption rubber 2 expel the air inside the adsorption blind hole 21, allowing the second adsorption rubber 2 to adhere tightly to the generator surface. Furthermore, since the second adsorption rubber 2 can deform and adapt to the curved surface of the generator, the installation of the magnet 3 and the first adsorption rubber 1 is not affected by the generator surface shape.

[0037] As an optional embodiment, an exhaust assembly 3 and a mounting block 4 are also included.

[0038] The mounting block 4 has a mounting groove 41 on its bottom surface for mounting the magnet 3 .

[0039] The exhaust assembly 3 includes a push plate 51, a rolling shaft 52 movably mounted on the bottom surface of the push plate 51, and a torsion spring 53 mounted on the upper end surface of the push plate 51. A sliding assembly 6 movably mounted on the upper end surface of the push plate 51 is slidably connected to the mounting block 4, and the sliding assembly 6 is connected to the torsion spring 53. When the sliding assembly 6 is moved downward, the push plate 51 swings under the action of the torsion spring 53, which in turn causes the push plate 51 to drive the rolling shaft 52 to stably press against the second adsorption rubber 2. Further downward movement of the sliding assembly 6 causes the rolling shaft 52 to roll on the second adsorption rubber 2, thereby discharging air from the adsorption blind hole 21 of the second adsorption rubber 2, and the second adsorption rubber 2 is stably adsorbed on the generator surface.

[0040] like Figure 5 As shown, it also includes a sliding assembly 6, which includes a sliding plate 61 slidably set on the mounting block 4, and an inclined plate 62 set on the sliding plate 61. A sliding groove 42 for installing the sliding plate 61 is provided in the mounting block 4, a first mounting groove 511 for installing the torsion spring 53 is provided on the push plate 51, and a second mounting groove 621 for installing the torsion spring 53 is provided on the inclined plate 62.

[0041] Preferably, the angle between the inclined plate 62 and the sliding plate 61 is acute. When the torsion spring 53 is properly installed, the distance between the push plate 51 and the side of the mounting block 4 gradually increases from top to bottom. The inclined position of the push plate 51 ensures that it can swing when subjected to a downward force, thereby allowing the rolling shaft 52 to stably press against the second adsorption rubber 2, thereby venting air from the second adsorption rubber 2.

[0042] like Figure 5 As shown, a fixing rod 7 is also included, and an open slot 642 for installing the fixing rod 7 is provided on the inclined plate 62. By arranging the fixing rod 7, the inclined plate 62 can be pushed to move downward or the inclined plate 62 can be lifted upward, which is simple and convenient to operate.

[0043] Preferably, the sliding plate 61 is provided with a stopper protrusion 8 on the side, and the inner wall of the slide groove 42 is provided with a stopper groove 43 for locking the stopper protrusion 8. The cooperation between the stopper protrusion 8 and the stopper groove 43 can fix the position of the sliding plate 61, thereby ensuring that the rolling shaft 52 is stably pressed against the second adsorption rubber 2 in the installed state and prevents separation, thereby preventing the second adsorption rubber 2 from being directly lifted by external forces, resulting in unstable installation of the magnet 3 and the first adsorption rubber 1.

[0044] In summary, the first adsorption rubber 1 is pressed by the magnetic attraction between the magnet 3 and the generator housing, causing the first adsorption rubber 1 to deform, and the serrated groove 11 fits tightly against the surface of the generator, increasing the contact area, and can be stably pressed and adsorbed on the generator housing. At the same time, the magnet 3 is supported by the deformation of the first adsorption rubber 1, making the pressing of the magnet 3 more stable and firm.

[0045] In summary, by pressing the fixing rod 7, the inclined plate 62 drives the sliding plate 61 to move downward, and the position of the sliding plate 61 is fixed by the cooperation between the limiting protrusion 8 and the limiting groove 43. When the sliding plate 61 moves downward, the pushing plate 51 is pressed against the second adsorption rubber 2, and the air between the second adsorption rubber 2 and the generator is discharged, so that the second adsorption rubber 2 is stably adsorbed on the generator housing. At the same time, the pushing plate 51 is always pressed against the second adsorption rubber 2, thereby further fixing the magnet 3 and the first adsorption rubber 1. At the same time, it can also adapt to different generator surface shapes and the installation is more stable. When disassembling, pull up the fixing rod 7, and then lift up the second adsorption rubber 2 to facilitate the disassembly of the magnet 3 and the first adsorption rubber 1. When storing, the second adsorption rubber 2 is located in the gap between the pushing plate 51 and the mounting block 4, protecting the second adsorption rubber 2 to prevent the second adsorption rubber 2 from being pressed or torn when not in the installed state.

[0046] like Figure 6 As shown, based on the above-described adsorption mechanism, this embodiment provides a device for testing the shaft voltage of a thermal power plant generator. The device also includes a degree-of-freedom adjustment rod 9 mounted on a mounting block 4; a two-stage telescopic structure made of aluminum alloy with an adjustable length range of 200-600 mm, secured by a knob-locking mechanism; and a lightweight design with an overall weight of ≤1.5 kg to prevent displacement due to its own weight. The length of the degree-of-freedom adjustment rod 9 is adjusted to align the carbon brush 102 vertically with the center of the shaft surface.

[0047] The carbon brush assembly 10 includes a constant-pressure spring 101 mounted on the degree-of-freedom adjustment rod 9 and a carbon brush 102 mounted on the constant-pressure spring 101. The carbon brush 102 is removable and made of a high-conductivity graphite-copper composite material. Its contact surface is curved to match the curvature of the shaft. Pressing the carbon brush 102 releases the constant-pressure spring 101, causing the brush 102 to automatically conform to the shaft under constant pressure.

[0048] The compression test cable 12 is installed on the carbon brush 102 .

[0049] As an optional embodiment, a filter module is installed at the end of the compression test cable 12 to suppress high-frequency interference. The cable has a double-layer shielding structure: the inner layer is a braided copper mesh layer, and the outer layer is wrapped with aluminum foil. The output terminal has a standardized interface: a banana plug or BNC connector, compatible with general instruments such as multimeters and oscilloscopes.

[0050] In summary, the operator does not need to get close to the rotating shaft, completely eliminating the risk of mechanical injury and electric shock; the constant pressure spring 101 provides constant pressure for the carbon brush 102, avoiding poor contact caused by manual shaking; the magnetic installation allows for quick positioning, and the operation can be completed by one person; the degree of freedom adjustment rod 9 is designed to be compatible with different models of generators, and the carbon brush 102 can be replaced separately after wear.

[0051] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. An adsorption mechanism, characterized in that: include, magnet (3); The first adsorption rubber (1) is arranged on the magnet (3) to block the current loop; Two second adsorption rubbers (2) are arranged at both ends of the first adsorption rubber (1) to increase the adsorption range of the first adsorption rubber (1); The first adsorption rubber (1) and the second adsorption rubber (2) enable the magnet (3) to prevent magnetic attraction from interfering with the magnetic field of the generator body when adsorbing the motor.

2. The adsorption mechanism according to claim 1, characterized in that: The bottom surface of the first adsorption rubber (1) is provided with a sawtooth groove (11).

3. The adsorption mechanism according to claim 2, characterized in that: The bottom surface of the second adsorption rubber (2) is provided with an adsorption blind hole (21).

4. The adsorption mechanism according to claim 3, characterized in that: Also included is a mounting block (4), and an exhaust assembly (5); A mounting groove (41) for mounting the magnet (3) is provided on the bottom surface of the mounting block (4); The exhaust assembly (5) includes a push plate (51), a rolling shaft (52) movably arranged on the bottom surface of the push plate (51), and a torsion spring (53) arranged on the upper end surface of the push plate (51). The upper end surface of the push plate (51) is movably provided with a sliding assembly (6) slidably connected to the mounting block (4), and the sliding assembly (6) is connected to the torsion spring (53).

5. The adsorption mechanism according to claim 4, characterized in that: The invention also includes a sliding assembly (6), wherein the sliding assembly (6) includes a sliding plate (61) slidably arranged on the mounting block (4), and an inclined plate (62) arranged on the sliding plate (61); a sliding groove (42) for mounting the sliding plate (61) is provided in the mounting block (4); a first mounting groove (511) for mounting the torsion spring (53) is provided on the pushing plate (51); and a second mounting groove (621) for mounting the torsion spring (53) is provided on the inclined plate (62).

6. The adsorption mechanism according to claim 5, characterized in that: The angle between the inclined plate (62) and the sliding plate (61) is an acute angle. When the torsion spring (53) is normally installed, the distance between the push plate (51) and the side surface of the mounting block (4) gradually increases from top to bottom.

7. The adsorption mechanism according to claim 6, characterized in that: It also includes a fixing rod (7), and the inclined plate (62) is provided with an open groove (622) for installing the fixing rod (7).

8. The adsorption mechanism according to claim 9, characterized in that: A limiting protrusion (8) is provided on the side of the sliding plate (61), and a limiting groove (43) for clamping the limiting protrusion (8) is provided on the inner wall of the sliding groove (42).

9. A device for testing the shaft voltage of a generator in a thermal power plant, characterized by: The adsorption mechanism according to any one of claims 1 to 8 further comprises: A degree of freedom adjustment rod (9) mounted on the mounting block (4); A carbon brush assembly (10) comprising a constant pressure spring (101) arranged on the degree of freedom adjustment rod (9), and a carbon brush (102) arranged on the constant pressure spring (101); and A compression test cable (12) is installed on the carbon brush (102).

10. The adsorption mechanism according to claim 9, characterized in that: The end of the compression test cable (12) is provided with a filter module to suppress high-frequency interference.

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