Axis displacement monitoring device

Abstract

The utility model discloses an axis displacement monitoring device, which belongs to the technical field of wind turbine generator monitoring and comprises a fan rotating shaft, a main shaft bearing is connected to the outer wall of the fan rotating shaft, a bearing seat is mounted outside the main shaft bearing, a mounting plate is inserted into the bearing seat, and insertion plates are connected to two sides of the bottom of the mounting plate. The two sides of the bottoms of the inserting plates on the two sides are connected with sliding blocks, the bottom of each sliding block is connected with an extending plate, a rotating shaft is rotationally connected between the two extending plates at the bottom of each inserting plate, and the outer wall of the extending plate on one side is connected with a torque sensor connected with the rotating shaft. The arranged rotating shaft rotates when the axis of the fan rotating shaft moves so as to drive the torque sensor to rotate, the torque value generated by rotation of the torque sensor is transmitted to the console for alarming, then the equipment is shut down, and the rotating shaft can make close contact with the outer wall of the fan rotating shaft through the spring when the mounting plate is assembled.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind turbine monitoring, and in particular relates to a monitoring device for axis displacement. Background Art

[0002] With the continuous development of wind power technology, the aging problem of equipment used in wind farms established in the early years has gradually become prominent, among which the problem of wind turbine generator main shaft bearing backlash has been exposed. The problem of wind turbine main shaft bearing backlash has been manifested in more and more wind turbine models. The main shaft backlash causes the overall shaft system to move backward, and the center of gravity of the wind turbine is offset, causing the wind turbine to shake during operation, increase the vibration of the unit, and frequently cause equipment failures. The backward movement of the wind turbine main shaft causes the wind turbine main shaft bearing to wear and the bearing temperature to rise, affecting the power generation efficiency.

[0003] In order to detect the back movement of the main shaft bearing in time, a monitoring device is needed. For example, Chinese utility model patent CN212985459U discloses an axial displacement monitoring device. When the shaft is axially displaced, the shaft pushes the bearing rollers. The axial movement of the bearing rollers pushes the displacement of the bearing outer ring. The axial displacement of the bearing outer ring pushes the probe to move. The probe movement pushes the piston movement. The piston movement squeezes the hydraulic oil in the oil chamber to move. The hydraulic oil in the oil chamber moves, which increases the pressure in the oil chamber. The oil chamber pressure is transmitted to the pressure switch. The pressure switch node is turned on. After the delay relay, the electrical signal is transmitted to the digital quantity acquisition module of the fan monitoring system. The digital signal acquisition module of the fan monitoring system receives an electrical signal alarm; after the alarm, the equipment is shut down to detect equipment abnormalities in advance and reduce the probability of major accidents. When the shaft is axially displaced, the shaft pushes the bearing rollers, and the axial movement of the bearing rollers pushes the displacement of the bearing outer ring. The axial displacement of the bearing outer ring pushes the probe to move, and the probe movement pushes the piston to move. The piston movement squeezes the hydraulic oil in the oil chamber to move, and the hydraulic oil in the oil chamber moves, which increases the pressure in the oil chamber. The oil chamber pressure is transmitted to the pressure switch, and the pressure switch node is turned on. After the delay relay, the electrical signal is transmitted to the digital signal acquisition module of the fan monitoring system.

[0004] Although the above-mentioned prior art can monitor the back movement of the main shaft bearing, if there is a problem with the sealing of the oil tank, it is easy to cause the pressure to fail to increase and thus fail to monitor the back movement of the main shaft bearing, and fail to shut down the wind turbine for maintenance in time. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A monitoring device for axis displacement comprises a fan shaft, wherein the outer wall of the fan shaft is connected to a main shaft bearing, a bearing seat is installed outside the main shaft bearing, a mounting plate is plugged into the bearing seat, plug-in plates are connected to the bottom sides of the mounting plate, sliding blocks are connected to the bottom sides of the plug-in plates on both sides, each sliding block is connected to an extension plate at the bottom, a rotating shaft is rotatably connected between the two extension plates at the bottom of each plug-in plate, a torque sensor connected to the rotating shaft is connected to the outer wall of the extension plate on one side, the axis displacement of the fan shaft causes the rotating shaft to rotate, the torque sensor detects the torque change and sends a signal, and then identifies the axis displacement of the fan shaft.

[0008] Preferably, the extending plate is slidably connected to the sliding block, a spring is arranged between the extending plate and the sliding block, the rotating shaft contacts the outer wall of the fan shaft and moves toward the sliding block to compress the spring, so that the rotating shaft fits tightly with the outer wall of the fan shaft.

[0009] Preferably, a rolling shaft is embedded in the outer wall of the rotating shaft near the bottom and is rotatably connected. The rotation direction of the rolling shaft is the same as the rotation direction of the fan shaft. When the fan shaft rotates normally, the rolling shaft follows the rotation. When the axis of the fan shaft is displaced, the rotating shaft is rotated by friction.

[0010] Preferably, the outer wall of the bearing seat near the upper end is provided with a plug-in groove, and sliding grooves are provided on both sides of the plug-in groove. The mounting plate is inserted into the plug-in groove, and the plug-in plates on both sides are inserted into the sliding grooves on both sides.

[0011] Preferably, a bolt hole is provided on one side of the outer wall of the bearing seat, and a fastening bolt is connected to the internal thread of the bolt hole. The fastening bolt contacts the outer wall of the mounting plate to fix the mounting plate to the spindle bearing.

[0012] Preferably, conductive plates are connected to both sides of the bottom of the mounting plate, the conductive plates on both sides are energized, an alarm device is connected to the bottom of the mounting plate located between the conductive plates on both sides, the bottom of the alarm device is connected to the alarm device, the electrode column contacts the outer wall of the main shaft bearing, the conductive plates on both sides are energized, and the axis of the fan shaft moves to contact the conductive plate on either side so that the alarm device is energized to send out an alarm signal.

[0013] Preferably, the electrode column is telescopically connected to the alarm device, a spring is provided between the alarm device and the electrode column, and the electrode column contacts the outer wall of the main shaft bearing and contracts inwards to compress the spring.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The rotating shaft is set to rotate when the axis of the fan shaft is misaligned, thereby driving the torque sensor to rotate, and the torque value generated by the torque sensor is transmitted to the console alarm, and then the equipment is shut down. In addition, the spring can make the rotating shaft closely contact the outer wall of the fan shaft when assembling the mounting plate.

[0016] 2. The rotation direction of the rolling shaft is set to be the same as the rotation direction of the fan shaft, so that each rolling shaft rotates along with the fan shaft when the fan shaft rotates. When the fan shaft axis is displaced, the rotating shaft rotates due to friction.

[0017] 3. By energizing the conductive plates on both sides, the axis of the fan shaft will contact the conductive plates on either side when it is displaced, so that the alarm device can be energized to send out an alarm signal, thereby detecting the displacement of the axis of the fan shaft.

[0018] 4. A floor spring is arranged between the electrode column and the alarm device so that the electrode column can be closely fitted to the outer wall of the main shaft bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a monitoring device for axis misalignment in the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the blower shaft and the bearing seat in the utility model;

[0021] Figure 3 This is a schematic diagram of the mounting plate structure in the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the rotating shaft and the rolling shaft in the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the electrode column and the conductive plate in the utility model.

[0024] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0025] 100, fan shaft; 101, bearing seat; 102, main shaft bearing; 103, plug-in slot; 104, sliding slot; 105, bolt hole;

[0026] 200, mounting plate; 201, fastening bolts; 202, plug-in plate; 203, extension plate; 204, rotating shaft; 205, rolling shaft; 206, torque sensor; 207, alarm device; 208, electrode column; 209, conductive plate; 210, sliding block. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0030] like Figure 1 as well as Figure 2 As shown, it is a schematic diagram of the structure of an axis displacement monitoring device of a preferred embodiment of the utility model. The axis displacement monitoring device of this embodiment includes a fan shaft 100. The outer wall of the fan shaft 100 is connected to a main shaft bearing 102. The outside of the main shaft bearing 102 is installed with a bearing seat 101. In this embodiment, the rotation of the fan shaft 100 drives the inner ring of the main shaft bearing 102 to rotate, and then can cooperate with the wind turbine to generate electricity.

[0031] like Figure 2 , Figure 3 as well as Figure 4 As shown, it is a schematic diagram of the fan shaft and bearing seat, mounting plate, rotating shaft and rolling shaft structure in this embodiment, a plug-in slot 103 is provided near the top of the bearing seat 101, sliding slots 104 are provided on both sides of the plug-in slot 103, a mounting plate 200 is plugged into the plug-in slot 103, plug-in plates 202 are fixedly connected to the bottom of both sides of the mounting plate 200, and the plug-in plates 202 on both sides are inserted into the sliding slots 104, a bolt hole 105 is provided on one side of the bearing seat 101, and a fastening bolt 201 is threadedly connected to the internal thread of the bolt hole 105, and the fastening bolt 201 fixes the mounting plate 200 to the bearing seat 101.

[0032] like Figure 4As shown, in order to detect the displacement of the axis 109, in this embodiment, sliding blocks 210 are fixedly connected to the bottom sides of the two side plug-in boards 202, and an extension plate 203 is slidably connected to the outside of each sliding block 210, and a spring is arranged between the extension plate 203 and the sliding block 210, and a rotating shaft 204 is rotatably connected between the two extension plates 203 at the bottom of each plug-in board 202, and a torque sensor 206 is installed on the outer wall of the extension plate 203 on one side, and the torque sensor 206 is connected to the rotating shaft 204, and the rotating shaft 204 contacts the outer wall of the fan shaft 100. In this embodiment, when the axis of the fan shaft 100 is displaced, the rotating shaft 204 rotates and drives the torque sensor 206 to rotate, and transmits the torque value generated by the rotation of the torque sensor 206 to the console alarm, and then the equipment is shut down, and the spring can make the rotating shaft 204 closely contact the outer wall of the fan shaft 100 when assembling the mounting plate 200.

[0033] like Figure 4 As shown, in order to ensure that the rotation of the fan shaft 100 during normal operation is not affected by the rotating shaft 204, in this embodiment, the rotating shafts 204 on both sides are rotatably connected with multiple rolling shafts 205 embedded in the outer wall near the bottom, and the rotation direction of each rolling shaft 205 is the same as the rotation direction of the fan shaft 100. Therefore, when the fan shaft 100 rotates, each rolling shaft 205 follows the rotation. When the axis of the fan shaft 100 is displaced, the rotating shaft 204 is rotated by friction.

[0034] like Figure 5 As shown, it is a schematic diagram of the structure of the electrode column and the conductive plate in this embodiment, conductive plates 209 are arranged on both sides of the bottom of the mounting plate 200, an alarm device 207 is arranged at the bottom of the mounting plate 200, and the bottom of the alarm device 207 is telescopically connected with an electrode column 208, a spring is arranged between the electrode column 208 and the alarm device 207, the electrode column 208 contacts the outer wall of the main shaft bearing 102, and the conductive plates 209 on both sides are energized. When the axis of the fan shaft 100 is misaligned, it contacts the conductive plate 209 on any side, so that the alarm device 207 can be energized to send out an alarm signal, thereby detecting the axis misalignment of the fan shaft 100.

[0035] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A monitoring device for axis displacement, comprising a fan shaft (100), wherein the outer wall of the fan shaft (100) is connected to a main shaft bearing (102), and a bearing seat (101) is installed outside the main shaft bearing (102), characterized in that: A mounting plate (200) is plugged into the bearing seat (101), plug-in plates (202) are connected to the bottom sides of the mounting plate (200), sliding blocks (210) are connected to the bottom sides of the plug-in plates (202) on both sides, and a protruding plate (203) is connected to the bottom of each sliding block (210). A rotating shaft (204) is rotatably connected between the two protruding plates (203) at the bottom of each plug-in plate (202), and a torque sensor (206) connected to the rotating shaft (204) is connected to the outer wall of the protruding plate (203) on one side. When the axis of the fan shaft (100) is displaced, the rotating shaft (204) rotates. The torque sensor (206) detects the torque change and sends a signal, thereby identifying the displacement of the axis of the fan shaft (100).

2. The monitoring device for axis displacement according to claim 1 is characterized in that: The extending plate (203) is slidably connected to the sliding block (210), a spring is arranged between the extending plate (203) and the sliding block (210), the rotating shaft (204) contacts the outer wall of the fan shaft (100) and moves in the direction of the sliding block (210) to compress the spring, so that the rotating shaft (204) and the outer wall of the fan shaft (100) are tightly fitted.

3. The monitoring device for axis displacement according to claim 2 is characterized in that: A rolling shaft (205) is rotatably connected to the outer wall of the rotating shaft (204) near the bottom. The rotation direction of the rolling shaft (205) is the same as the rotation direction of the fan rotating shaft (100). When the fan rotating shaft (100) rotates normally, the rolling shaft (205) rotates accordingly. When the axis of the fan rotating shaft (100) is misaligned, the rotating shaft (204) rotates due to friction.

4. The monitoring device for axis displacement according to claim 3 is characterized in that: An outer wall of the bearing seat (101) close to the upper end is provided with an inserting groove (103), and sliding grooves (104) are provided on both sides of the inserting groove (103). The mounting plate (200) is inserted into the inserting groove (103), and the inserting plates (202) on both sides are inserted into the sliding grooves (104) on both sides.

5. The monitoring device for axis displacement according to claim 4 is characterized in that: A bolt hole (105) is provided on one side of the outer wall of the bearing seat (101), and a fastening bolt (201) is connected to the inner thread of the bolt hole (105). The fastening bolt (201) contacts the outer wall of the mounting plate (200) to fix the mounting plate (200) and the main shaft bearing (102).

6. The monitoring device for axis displacement according to any one of claims 1 to 5, characterized in that: Conductive plates (209) are connected to both sides of the bottom of the mounting plate (200), and the conductive plates (209) on both sides are energized. The bottom of the mounting plate (200) located between the conductive plates (209) on both sides is connected to an alarm device (207), and the bottom of the alarm device (207) is connected to the alarm device (207). The electrode column (208) contacts the outer wall of the main shaft bearing (102), and the conductive plates (209) on both sides are energized. The axis of the fan shaft (100) moves to contact the conductive plate (209) on either side, so that the alarm device (207) is energized to send out an alarm signal.

7. The monitoring device for axis displacement according to claim 6, characterized in that: The electrode column (208) is telescopically connected to the alarm device (207), a spring is arranged between the alarm device (207) and the electrode column (208), and the electrode column (208) contacts the outer wall of the main shaft bearing (102) and contracts inward to compress the spring.

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