Wheel contact type synchronous power generation device, online monitoring system and installation method

Abstract

The invention relates to the field of self-generating equipment for online monitoring, and discloses a wheel contact type synchronous power generation device, an online monitoring system and an installation method. The power generation device comprises a shell and a roller, an adsorption assembly capable of being fixed to a machine shell of the rotary machine is arranged outside the shell, and a stator and a rotor are installed in the shell; the roller is slidably mounted on a guide rail on the shell, the wheel surface of the roller is in contact with the rotor, and the roller can drive the rotor to rotate when the wheel surface is in contact with a rotating shaft of the rotating machine, so that the stator generates electromagnetic induction to generate power; the roller can slide along the guide rail when the rotating shaft moves radially, and the guide rail is provided with an elastic part which is used for buffering the sliding action of the roller and guiding the roller to reset when the rotating shaft moves weakly. The device has the advantages of being easy to operate and convenient and fast to mount, dismount and maintain, wired power supply can be provided for the sensor, and stable and rapid data transmission is achieved.

Description

Technical Field

[0001] The invention relates to the field of self-generating equipment for on-machine monitoring, in particular to a wheel contact type synchronous generating device, an online monitoring system and an installation method. Background Art

[0002] The use of rotating machinery (such as pumps, motors, etc.) faces many challenges, including wear, failure, and accidents, so it is particularly important to use online monitoring systems to continuously monitor rotating machinery. Existing online monitoring systems for rotating machinery generally consist of sensors, data acquisition and transmission modules, and analysis software. The sensor connection methods are mainly divided into wired and wireless.

[0003] For wired connections, large rotating machinery usually uses high voltage electricity as a power source, while auxiliary instruments and meters for monitoring require low voltage electricity, so additional wiring is required, which not only increases the cost, but also complicates the installation process and brings many inconveniences during equipment maintenance. At present, some additional power generation modules require the entire machine to be disassembled during installation, and some even require the original structure of the machine to be modified, which not only makes the installation process complicated, but also may affect the normal operation of the production equipment, resulting in increased costs. In addition, this installation method also makes subsequent disassembly and maintenance work cumbersome. For wireless connections, although a large amount of wiring is eliminated, it relies on battery power supply, and the battery needs to be replaced regularly, and data transmission is limited and not timely enough, which not only increases the difficulty of maintenance, but also may bring safety hazards to places that require explosion-proof. In addition, the existing self-generating equipment needs to modify the rotating machinery before installation, which may damage the machinery, and the installation is complicated, and it is not convenient for subsequent disassembly and maintenance.

[0004] In summary, the current power supply method for sensors used for online monitoring of rotating machinery cannot take into account the performance of easy disassembly and assembly, stable data transmission, and safety, which needs to be solved urgently. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the present invention provides a wheel-contact synchronous power generation device, an online monitoring system and an installation method. The power generation device has the advantages of simple operation, convenient installation and disassembly and maintenance, can provide wired power supply for sensors, and realize stable and fast data transmission.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention discloses a wheel contact type synchronous power generation device, comprising a shell and a roller, wherein an adsorption component which can be fixed on the mounting surface of a rotating machine is arranged outside the shell, and a stator and a rotor are installed inside the shell; the roller is slidably installed on a guide rail on the shell, and the wheel surface of the roller keeps in contact with the rotor. The roller can drive the rotor to rotate when the wheel surface contacts the rotating shaft of the rotating machine, so that the stator generates electromagnetic induction power generation; the roller can also generate a sliding action along the guide rail when the rotating shaft undergoes radial movement, and an elastic member is installed on the guide rail for buffering the sliding action of the roller and guiding the roller to reset when the movement of the rotating shaft is weakened.

[0008] As a further improvement of the above scheme, the guide rail is detachably connected to the shell; the guide rail includes a support, the support is provided with a guide groove which is an arc in the direction of the groove length, and the arc is concentric with the rotor; a wheel axle is detachably inserted in the guide groove, the wheel axle can slide along the groove length direction of the guide groove, and the roller is coaxially rotatably installed on the wheel axle.

[0009] As a further improvement of the above scheme, there are two guide rails, which are symmetrically distributed at the axial ends of the roller; there are two rollers; each guide rail includes two symmetrical ear-shaped supports, which correspond to the two rollers one by one, so that a clamping area facing the rotating shaft is formed between the two rollers.

[0010] As a further improvement of the above solution, the elastic member is a spring; the spring is arranged in the guide groove along the groove length direction, one end of the spring is supported by the guide groove (610), and the other end acts on the wheel shaft (22).

[0011] As a further improvement of the above solution, the adsorption assembly includes a plurality of adsorption units arranged on one side or multiple sides of the shell, and each adsorption unit adopts a magnet or a suction cup or adhesive.

[0012] As a further improvement of the above solution, each adsorption unit and the shell are movably connected via a joint ball head.

[0013] As a further improvement of the above scheme, the outer shell is cylindrical, a cavity is provided inside the outer shell, and an opening connected to the cavity is provided outside the outer shell; the rotor includes a first disk, the first disk is located in the cavity, and the first disk is coaxially rotatably connected to the outer shell through a connecting shaft, and the wheel surface of the roller passes through the opening and contacts the side surface of the first disk; a plurality of mounting grooves in a circular array are provided on one side of the first disk, and a corresponding magnet is embedded in each mounting groove.

[0014] As a further improvement of the above scheme, the stator includes a second disk, which is coaxially fixedly installed in the cavity and divides a sealed cavity for installing the circuit on one side of the cavity; a plurality of induction coils in a circular array are fixedly connected to the side of the second disk close to the first disk, and the surface of the induction coil is coated with explosion-proof glue, and the circuit of the induction coil extends into the sealed cavity through the opening on the second disk.

[0015] The power generation device also includes a power conditioning module arranged in the sealed cavity; the power conditioning module is used to rectify and stabilize the induced current generated by the induction coil; the power conditioning module includes a circuit board, and the circuit board is fixedly connected to the bottom wall of the sealed cavity.

[0016] The present invention also discloses an online monitoring system, comprising a sensor and a power generation device which are arranged on a rotating machine and electrically connected via a wire; the power generation device adopts a wheel contact type synchronous power generation device as described above.

[0017] The present invention also discloses an installation method of an online monitoring system, which is applied to the online monitoring system as described above, and the method comprises:

[0018] The sensor is fixedly installed at a preset point of the rotating machinery;

[0019] The power generation device and the sensor are electrically connected via a wire;

[0020] The shell is fixed to the mounting surface of the rotating machinery through the adsorption assembly so that the initial position of the roller meets the following conditions: the axis of the roller and the rotating shaft are parallel to each other, the wheel surface is in contact with the rotating shaft, and the roller generates a preset clamping force on the elastic part; wherein, when the mounting surface is not perpendicular to the axis of the rotating shaft, the angle between the adsorption unit and the shell is adjusted by the joint ball head to meet the conditions.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The wheel contact type synchronous power generation device disclosed in the present invention can be installed on the mounting surface of the rotating machinery through an adsorption component, without the need for load installation, simple operation, and convenient installation, disassembly and maintenance; the rotor is driven to rotate by a roller that can contact the running shaft, so that the stator generates electromagnetic induction power generation, and provides wired power supply for the sensor, without considering wiring, battery replacement, power loss and other issues, to achieve stable high-frequency signal transmission, and better installation and use effect; by arranging the roller in a guide groove provided with an elastic member, when the shaft moves radially, the roller can slide along the guide groove to keep the wheel surface in close contact with both the rotor and the shaft at the same time. The structure has good operating characteristics when in contact with the shaft, can adapt to the unbalanced and misaligned rotation of the equipment, and ensure the reliability of driving power generation; compared with the traditional monitoring system, the power generation device can be quickly installed and implemented without modifying the acting equipment, has low on-site installation requirements, and saves installation costs and maintenance costs.

[0023] 2. The present invention arranges the guide rail and the housing to be detachably connected, and the wheel axle is detachably inserted in the guide groove. It can take into account the actual factors such as the shaft specifications of the rotating machinery and the speed range required for power generation, and selectively replace rollers and / or guide rails of different sizes, thereby being able to adjust the transmission ratio and transmission effect. It is suitable for rotating machinery with different speeds, provides different speeds for the rotor, and balances the power generation efficiency.

[0024] 3. The adsorption assembly of the present invention is provided with a plurality of adsorption units, and these adsorption units can be arranged on one side or multiple sides of the outer shell, so that the deployment mode of the outer shell can be flexibly adjusted according to the actual installation scenario, and each adsorption unit can be arbitrarily selected from magnets, suction cups, and adhesives, which is suitable for the installation points of most rotating machinery. For example, magnets can be directly magnetically attracted to metal mounting surfaces. These adsorption methods are also suitable for scenes with smaller mounting points, thereby further improving the convenience of installation and disassembly and maintenance. On this basis, by movably connecting the adsorption unit and the outer shell through a joint ball head, the relative angle between the adsorption surface of the adsorption unit and the outer shell can be flexibly adjusted, so that it is suitable for situations where the mounting surface is not perpendicular to the axis of the rotating shaft, thereby ensuring the reliability of the installation.

[0025] 4. The online monitoring system and installation method thereof disclosed in the present invention can produce the same beneficial effects as the above-mentioned power generation device by applying the above-mentioned power generation device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of an online monitoring system in an embodiment of the present invention installed on a rotating machine.

[0027] Figure 2 for Figure 1 Enlarged view of point A in .

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the wheel contact type synchronous power generation device in an embodiment of the present invention.

[0029] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure of the power generation device from another perspective.

[0030] Figure 5 for Figure 3 A side cross-sectional view of the power generation device in a horizontally placed state.

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the outer shell and the internal stator in an embodiment of the present invention.

[0032] Figure 7 It is a three-dimensional cross-sectional schematic diagram of an adsorption unit in an embodiment of the present invention being movably connected to a housing via a joint ball head.

[0033] Figure 8 It is a schematic diagram of the three-dimensional structure of the rotor in an embodiment of the present invention.

[0034] Fig. 9 It is a schematic diagram of the three-dimensional structure of the circuit board and the stator in the embodiment of the present invention.

[0035] Fig.10 It is a schematic diagram of the three-dimensional structure of two guide rails and two rollers in an embodiment of the present invention.

[0036] Fig.11 for Fig.10 Schematic diagram of a three-dimensional structure in which a single roller is installed on a single support.

[0037] In the figure: 1. shell; 10. cavity; 101. sealed cavity; 11. opening; 12. circuit board; 13. capacitor; 14. interface; 15. wire; 2. roller; 21. wheel surface; 22. axle; 3. adsorption component; 31. adsorption unit; 32. joint ball head; 4. stator; 41. induction coil; 42. second disc; 5. rotor; 51. first disc; 510. mounting groove; 52. magnet; 53. connecting shaft; 6. guide rail; 61. support; 610. guide groove; 7. elastic member; 8. rotating machinery; 81. mounting surface; 82. rotating shaft; 9. sensor. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0039] See also Figure 1 and Figure 2 This embodiment provides an online monitoring system, including a sensor 9 and a power generation device. The sensor 9 and the power generation device are electrically connected through a wire 15, and the power generation device is used to power the data collection of the sensor 9. Both the sensor 9 and the power generation device can be installed on the rotating machine 8. Specifically, the sensor 9 can be fixedly installed on the mounting surface 81 of the rotating machine 8 by means of bolts, etc., and the installation method of the power generation device will be described below.

[0040] It should be noted that the rotating machine 8 can be a pump (such as a centrifugal pump in this embodiment), or a motor, a lathe, or other equipment. Its mounting surface 81 can be the housing of the motor, or some housing (such as a base, etc.) on the rotating machine 8 that is fixed relative to the ground or the mounting platform. The rotating shaft 82 of the rotating machine 8 can be the driving shaft or some driven shafts of the motor, or a cylindrical component such as a coupling that rotates and can be exposed to the outside world.

[0041] See also Figures 3 to 5 The power generation device is a wheel contact type synchronous power generation device, including a housing 1 and a roller 2, and may also include a power conditioning module.

[0042] An adsorption assembly 3 is provided outside the shell 1, and the shell 1 can be fixed to the mounting surface 81 of the rotating machine 8 through the adsorption assembly 3. The adsorption assembly 3 includes a plurality of adsorption units 31 arranged on one side or multiple sides of the shell 1, and each adsorption unit 31 adopts a magnet, a suction cup or adhesive. In the present embodiment, the shell 1 is cylindrical, and the adsorption assembly 3 includes four magnets arranged at the end of the shell 1 and in a circular array, and the shell 1 can be magnetically attracted to the mounting surface 81; and the outer periphery of the end of the shell 1 is an annular structure, and all the adsorption units 31 are surrounded by the annular structure, and the top of the magnet and the top of the annular structure are located in the same plane, so that the contact area between the shell 1 as a whole and the mounting surface 81 can be increased, thereby improving the stability of the adsorption.

[0043] Also, see Figure 6 In some embodiments, each adsorption unit 31 and the housing 1 can also be movably connected via a joint ball head 32, so that the relative angle between the housing 1 and the mounting surface can be flexibly adjusted to adapt to the situation where the mounting surface 81 and the axis of the rotating shaft 82 are not perpendicular.

[0044] The housing 1 has a cavity 10 formed therein, and an opening 11 communicating with the cavity 10 is formed on the circumferential side of the housing 1. The housing 1 may be formed by two sub-shells assembled by bolts. The stator 4 and the rotor 5 are installed in the housing 1.

[0045] See also Figures 7 to 9 In this embodiment, the rotor 5 includes a first disk 51, which is located in the cavity 10 and is coaxially rotatably connected to the housing 1 via a connecting shaft 53. The wheel surface 21 of the roller 2 passes through the opening 11 and contacts the side surface of the first disk 51. A plurality of mounting grooves 510 in a circumferential array are provided on one side of the first disk 51, and each mounting groove 510 is embedded with a corresponding magnet 52, which can be fixed in the mounting groove 510 by glue injection (not shown).

[0046] The stator 4 includes a second disk 42, which is coaxially fixedly installed in the cavity 10 and divides a sealed cavity 101 for installing the circuit on one side of the cavity 10; a plurality of induction coils 41 in a circular array are fixedly connected to the side of the second disk 42 close to the first disk 51, and the surface of the induction coil 41 is coated with explosion-proof glue, which can isolate the copper wire of the induction coil 41 from the outside air, and the circuit of the induction coil 41 extends into the sealed cavity 101 through the opening on the second disk 42.

[0047] The power conditioning module is arranged in the sealed cavity 101; the power conditioning module is used to rectify and stabilize the induced current generated by the induction coil 41; the power conditioning module includes a circuit board 12, one side of the circuit board 12 is fixedly connected to the bottom wall of the sealed cavity 101, and the other side of the circuit board 12 is provided with components such as a capacitor 13; the housing 1 is also provided with an interface 14 that is connected to the sealed cavity 101 and for the wire 15 to pass through.

[0048] When the rotor 5 rotates relative to the stator 4, the first turntable 51 drives the multiple magnets 52 to rotate, and the "moving magnetic field lines of force" "cut" the induction coil 41 fixed in the stator 4, thereby generating an induced electromotive force in the induction coil 41, generating alternating current, and outputting stable electric energy for use by the sensor 9 after rectification and voltage stabilization by the power conditioning module, and finally realizing synchronous power generation and monitoring when the device is started. This power generation principle is the working principle of existing common generators, which will not be repeated here.

[0049] In some embodiments, the power generation device may further include an energy storage module (not shown), which can store the DC power generated by the above-mentioned rectification, and when the stored power is needed, it can be converted into AC output through circuit elements such as an inverter.

[0050] See also Fig.10 and Fig.11 The guide rail 6 can be fixedly installed on the circumferential outer side of the shell 1 by screws, and the roller 2 is slidably installed on the guide rail 6 on the shell 1. The wheel surface 21 of the roller 2 keeps in contact with the rotor 5. The roller 2 can drive the rotor 5 to rotate when the wheel surface 21 contacts the rotating shaft 82 of the rotating machinery 8, so that the stator 4 generates electromagnetic induction power generation; the roller 2 can also slide along the guide rail 6 when the rotating shaft 82 moves radially, and an elastic member 7 is installed on the guide rail 6 for buffering the sliding action of the roller 2 and guiding the roller 2 to reset when the movement of the rotating shaft 82 weakens.

[0051] In this embodiment, the elastic member 7 can be a spring; the spring is arranged in the guide groove 610 along the groove length direction, one end of the spring abuts against the inner wall of the tail end of the guide groove 610, and the other end abuts against the axle 22. Of course, in some embodiments, the elastic member 7 can also be other elements, such as elastic gaskets, butterfly springs, etc.

[0052] The roller 2 can be a PU injection wheel or a polyurethane wheel, and the wheel surface 21 thereof has excellent anti-skid and wear resistance, and has significant elasticity, certain shock absorption and stability, thereby providing a relatively stable transmission for the rotor 5 .

[0053] The guide rail 6 includes two supports 61, each of which is provided with a guide groove 610 in the shape of an arc in the groove length direction, and the arc is concentric with the rotor 5; the guide groove 610 is detachably plugged with the wheel axle 22, the wheel axle 22 can slide along the groove length direction of the guide groove 610, and the roller 2 is coaxially rotatably mounted on the wheel axle 22. When the wheel axle 22 is inserted into the guide groove 610, the wheel surface 21 of the roller 2 can just be tangentially in contact with the first disc 51 of the rotor 5, and at the same time, the arc-shaped guide groove 610 concentric with the rotor 5 (first disc 51) can ensure that the wheel surface 21 and the rotor 5 can maintain contact no matter where the wheel axle 22 slides in the guide groove 610.

[0054] In the present embodiment, there are two guide rails 6, which are symmetrically distributed at the two axial ends of the roller 2; there are two rollers 2; each guide rail 6 includes two symmetrical ear-shaped supports 61, which correspond to the two rollers 2 one by one, so that a clamping area facing the rotating shaft 82 is formed between the two rollers 2. When the two rollers 2 are frictionally driven by the middle rotating shaft 82, they can rotate in the same direction, thereby driving the first disc 51 to rotate together by friction force, thereby improving the reliability of the drive.

[0055] When the generator is installed in the initial state near the rotating shaft 82, the operator can manually make the roller 2 produce a preset pressing force on the elastic member 7, that is, the two rollers 2 of the generator are squeezed closer to the middle rotating shaft 82. In this way, no matter whether the radial movement of the rotating shaft 82 during operation is close to one of the rollers 2 or away from the roller 2, the elastic member 7 can play a role in guiding the roller 2 to return to its original position, keeping the wheel surface 21 of the roller 2 in close contact with the rotating shaft 82, and ensuring the stability of the transmission.

[0056] In addition, by setting the axle 22 to be detachably pluggable, and the guide rail 6 to be detachably connected to the housing 1, it is convenient to replace guide rails 6 of different sizes (the diameter of the circle where the arc is located), and replace rollers 2 of different sizes (diameters) on the guide rail 6, so as to provide different rotation speeds for the rotor 5. For example, when the diameter of the roller 2 is smaller than the diameter of the first disc 51, the rotation speed of the first disc 51 will be lower than the rotation speed of the roller 2, thereby achieving a deceleration effect. Conversely, when the diameter of the roller 2 is larger than the diameter of the first disc 51, the rotation speed of the first disc 51 will be higher than the rotation speed of the roller 2, thereby achieving an acceleration effect. In short, rollers 2 and / or guide rails 6 of different sizes can be selectively replaced according to actual factors such as the specifications of the rotating shaft 82 of the rotating machinery 8 and the speed range required for power generation.

[0057] This embodiment also provides an installation method applied to the above-mentioned online monitoring system, comprising the steps of:

[0058] S1. Fixedly install the sensor 9 at a preset point of the rotating machine 8.

[0059] S2. Electrically connect the power generation device and the sensor 9 via the wire 15.

[0060] S3. Fix the shell 1 to the mounting surface 81 of the rotating machinery 8 through the adsorption assembly 3, so that the initial position of the roller 2 meets the following conditions: the axis of the roller 2 and the rotating shaft 82 are parallel to each other, the wheel surface 21 is in contact with the rotating shaft 82, and the roller 2 generates a preset clamping force on the elastic member 7; wherein, when the mounting surface is not perpendicular to the axis of the rotating shaft 82, the angle between the adsorption unit 31 and the shell 1 is adjusted by the joint ball head to meet the conditions.

[0061] It should be noted that there is no particular order for the above steps, and other order combinations are also possible.

[0062] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wheel contact type synchronous generator, characterized in that: The invention comprises a housing (1) and a roller (2). The housing (1) is provided with an adsorption assembly (3) that can be fixed on a mounting surface (81) of a rotating machine (8). The housing (1) is provided with a stator (4) and a rotor (5) inside. The roller (2) is slidably mounted on a guide rail (6) on the housing (1). The wheel surface (21) of the roller (2) is in contact with the rotor (5). When the wheel surface (21) is in contact with a rotating shaft (82) of the rotating machine (8), the roller (2) can drive the rotor (5) to rotate, so that the stator (4) generates electromagnetic induction power generation. When the rotating shaft (82) moves radially, the roller (2) can also generate a sliding action along the guide rail (6). The guide rail (6) is provided with an elastic member (7) for buffering the sliding action of the roller (2) and guiding the roller (2) to reset when the movement of the rotating shaft (82) is weakened.

2. A wheel contact type synchronous generator according to claim 1, characterized in that: The guide rail (6) is detachably connected to the housing (1); the guide rail (6) comprises a support (61), the support (61) is provided with a guide groove (610) which is arc-shaped in the groove length direction, and the arc is cocentric with the rotor (5); a wheel shaft (22) is detachably inserted into the guide groove (610), the wheel shaft (22) can slide along the groove length direction of the guide groove (610), and the roller (2) is coaxially rotatably mounted on the wheel shaft (22).

3. A wheel contact type synchronous generator according to claim 2, characterized in that: The number of the guide rails (6) is two, and the two guide rails (6) are symmetrically distributed at the two axial ends of the roller (2); the roller (2) is provided with two; each guide rail (6) comprises two symmetrical ear-shaped supports (61), which correspond to the two rollers (2) one by one, so that a clamping area for facing the rotating shaft (82) is formed between the two rollers (2).

4. A wheel contact type synchronous generator according to claim 3, characterized in that: The elastic member (7) is a spring; the spring is arranged in the guide groove (610) along the groove length direction, one end of the spring is supported by the guide groove (610), and the other end acts on the wheel shaft (22).

5. A wheel contact type synchronous generator according to any one of claims 1 to 4, characterized in that: The adsorption component (3) comprises a plurality of adsorption units (31) arranged on one side or multiple sides of the housing (1), and each adsorption unit (31) is made of a magnet, a suction cup or adhesive.

6. A wheel contact type synchronous generator according to claim 5, characterized in that: Each adsorption unit (31) is movably connected to the housing (1) via a joint ball head (32).

7. A wheel contact type synchronous generator according to any one of claims 1 to 4, characterized in that: The shell (1) is cylindrical, a cavity (10) is provided in the shell (1), and an opening (11) communicating with the cavity (10) is provided outside the shell (1); the rotor (5) comprises a first disk (51), the first disk (51) is located in the cavity (10), and the first disk (51) is coaxially rotatably connected to the shell (1) via a connecting shaft (53), and the wheel surface (21) of the roller (2) passes through the opening (11) and contacts the side surface of the first disk (51); a plurality of mounting grooves (510) in a circumferential array are provided on one side of the first disk (51), and each mounting groove (510) is embedded with a corresponding magnet (52).

8. A wheel contact type synchronous generator according to claim 7, characterized in that: The stator (4) comprises a second disc (42), which is coaxially fixedly mounted in the cavity (10) and has a sealed cavity (101) for mounting a circuit divided on one side of the cavity (10); a plurality of induction coils (41) arranged in a circumferential array are fixedly connected to one side of the second disc (42) close to the first disc (51); the surfaces of the induction coils (41) are coated with an injection glue for explosion-proofing, and the circuits of the induction coils (41) extend into the sealed cavity (101) through openings on the second disc (42); the power generation device further comprises a power conditioning module arranged in the sealed cavity (101); the power conditioning module is used to rectify and stabilize the induced current generated by the induction coil (41); the power conditioning module comprises a circuit board (12), and the circuit board (12) is fixedly connected to the bottom wall of the sealed cavity (101).

9. An online monitoring system, characterized in that: It comprises a sensor (9) and a generator which are arranged on a rotating machine (8) and are electrically connected via a wire (15); the generator is a wheel contact type synchronous generator as described in claim 6.

10. A method for installing an online monitoring system, characterized in that: Applied to an online monitoring system as claimed in claim 9, the method comprises: The sensor (9) is fixedly mounted at a preset point of the rotating machine (8); The power generation device and the sensor (9) are electrically connected via a wire (15); The housing (1) is fixed to the mounting surface (81) of the rotating machine (8) through the adsorption assembly (3), so that the initial position of the roller (2) satisfies the following conditions: the axes of the roller (2) and the rotating shaft (82) are parallel to each other, the wheel surface (21) and the rotating shaft (82) are in contact with each other, and the roller (2) generates a preset pressing force on the elastic member (7); wherein, when the mounting surface and the axis of the rotating shaft (82) are not perpendicular, the angle between the adsorption unit (31) and the housing (1) is adjusted through the joint ball head to meet the above conditions.

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