Fault diagnosis device for wind driven generator

Abstract

The utility model discloses a fault diagnosis device for a wind driven generator, which comprises a cabin arranged on a mounting rod and further comprises a detection assembly arranged on a gearbox and used for detecting oil in the gearbox, the detection assembly comprises an L-shaped pipe fixedly connected to the bottom of the gearbox, the other end of the L-shaped pipe is fixedly connected with a detection pipe, and the detection pipe is fixedly connected with the mounting rod. The end, away from the L-shaped pipe, of the detection pipe is connected with a connecting pipe, the other end of the connecting pipe is located on the top of the gearbox, and the detection pipe is provided with a particle sensor. According to the utility model, through the arrangement of the detection assembly and under the action of the circulation assembly, the lubricating oil in the gearbox is circulated, so that the particle sensor forms circulating flow detection on the oil, the change of impurities in the oil can be conveniently, timely and accurately found, and the accuracy of fault detection on the gearbox of the wind driven generator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine generators, in particular to a fault diagnosis device for wind turbine generators. Background Art

[0002] As the wind turbine continues to run, the gear parts inside the wind turbine gearbox are damaged due to mutual wear, which leads to increased noise and unstable power transmission. In the prior art, the detection of wind turbine gearbox failure is mainly based on the detection of impurities in the oil in the gearbox by a particle sensor to determine the wear condition of the gear parts.

[0003] The gear parts in the wind turbine gearbox are mostly lubricated in the form of splashing oil. When using a particle sensor to detect impurities in the oil, due to the irregular flow of the oil, it is difficult for the particle sensor to ensure the comprehensiveness of the impurity detection in the oil, thereby reducing the accuracy of the wind turbine gearbox fault detection.

[0004] Therefore, there is an urgent need for a fault diagnosis device for a wind turbine to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a fault diagnosis device for a wind turbine generator, so as to solve the problem that the particle sensor proposed in the above background technology is difficult to ensure the accuracy of detecting impurities in oil.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fault diagnosis device for a wind turbine generator, comprising a nacelle arranged on a mounting rod, one side of the nacelle is connected to a plurality of blades via an input shaft, a gearbox is arranged in the nacelle, one end of the input shaft is connected to the gearbox, an output shaft of the gearbox is connected to a generator body, and also comprises a detection component arranged in the gearbox for detecting the oil inside the gearbox;

[0007] The detection component includes an L-shaped tube fixedly connected to the bottom of the gearbox, the other end of the L-shaped tube is fixedly connected to a detection tube, one end of the detection tube away from the L-shaped tube is connected to a connecting tube, the other end of the connecting tube is located at the top of the gearbox, the detection tube is provided with a particle sensor, and the L-shaped tube is provided with a circulation component for circulating the lubricating oil in the gearbox.

[0008] The diameter of the detection tube is larger than the diameters of the L-shaped tube and the connecting tube.

[0009] The circulation component includes a circulation pipe fixedly connected to the side of the L-shaped pipe close to the fan blades, the circulation pipe is slidably connected to a circulation rod, one end of the circulation rod located inside the circulation pipe is fixedly connected to a circulation plate, the gearbox is provided with a driving component for driving the circulation plate, two one-way valves are provided in the L-shaped pipe, and the two one-way valves are located on both sides of the circulation pipe.

[0010] The driving assembly includes a fixed plate fixedly connected to the side of the gearbox close to the fan blades, the fixed plate is rotatably connected to a driving rod, the driving rod is fixedly connected to a driving ring on the side close to the circulation pipe, a plurality of triangular plates are fixedly connected to the side wall of the driving ring, and the gearbox is provided with a rotating assembly for rotating the driving ring.

[0011] The circulation rod is provided with a reset assembly for resetting the circulation plate, and the reset assembly includes a reset ring fixedly connected to the side wall of the circulation rod. The side wall of the circulation rod is sleeved with a spring, and the two ends of the spring are respectively connected to the reset ring and the side wall of the circulation pipe.

[0012] The rotating assembly includes a mounting frame fixedly connected to a side of the gearbox close to the driving rod, the mounting frame is connected to a rotating wheel via a rotating shaft, the rotating wheel abuts against a side wall of the input shaft, one end of the rotating shaft passes through the mounting frame and is fixedly connected to a first bevel gear, the other end of the driving rod is fixedly connected to a second bevel gear, and the first bevel gear and the second bevel gear are meshed with each other.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model arranges the detection component, under the action of the circulation component, so that the lubricating oil in the gearbox can be circulated, so that the particle sensor can form a circulation flow detection on the oil, and the change of impurities in the oil can be found conveniently and accurately, thereby improving the comprehensiveness of the detection of impurities in the oil, and further improving the accuracy of the fault detection of the wind turbine gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the cabin of the utility model;

[0017] Figure 3 This is a schematic diagram of the detection component structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the drive assembly of the utility model;

[0019] Figure 5This is a schematic diagram of the internal structure of the circulation component of the utility model.

[0020] In the figure: 101, mounting rod; 102, cabin; 103, fan blade; 104, gearbox; 105, input shaft; 106, generator body; 201, L-shaped tube; 202, detection tube; 203, connecting tube; 204, particle sensor; 301, circulation tube; 302, circulation rod; 303, circulation plate; 304, one-way valve; 401, fixing plate; 402, driving rod; 403, driving ring; 404, triangular plate; 501, reset ring; 502, spring; 601, mounting frame; 602, rotating shaft; 603, rotating wheel; 604, first bevel gear; 605, second bevel gear. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] See also Figure 1-Figure 5 , a fault diagnosis device for a wind turbine generator shown in the figure includes a nacelle 102 arranged on a mounting pole 101, a plurality of blades 103 are connected to one side of the nacelle 102 via an input shaft 105, a gearbox 104 is arranged in the nacelle 102, one end of the input shaft 105 is connected to the gearbox 104, an output shaft of the gearbox 104 is connected to a generator body 106, and also includes a detection component arranged in the gearbox 104 for detecting the oil inside the gearbox 104;

[0024] The detection component includes an L-shaped tube 201 fixedly connected to the bottom of the gearbox 104. The gearbox 104 is connected to the cabin 102 through four brackets, so that the installation space of the L-shaped tube 201 can be ensured. The other end of the L-shaped tube 201 is fixedly connected to a detection tube 202. One end of the detection tube 202 away from the L-shaped tube 201 is connected to a connecting tube 203. The other end of the connecting tube 203 is located at the top of the gearbox 104. The detection tube 202 is provided with a particle sensor 204. The L-shaped tube 201 is provided with a circulation component for circulating the lubricating oil in the gearbox 104.

[0025] It should be noted here that: through the setting of the detection component, under the action of the circulation component, the lubricating oil in the gearbox 104 is circulated, so that the particle sensor 204 forms a circulating flow detection on the oil, which is convenient for timely and accurate detection of changes in impurities in the oil, thereby improving the comprehensiveness of the detection of impurities in the oil, thereby further improving the accuracy of fault detection of the wind turbine gearbox 104.

[0026] See also Figure 5 , the diameter of the detection tube 202 shown in the figure is larger than the diameters of the L-shaped tube 201 and the connecting tube 203;

[0027] It should be noted that by setting the diameter of the detection tube 202 larger than the diameters of the L-shaped tube 201 and the connecting tube 203, the flow velocity of the lubricating oil in the detection tube 202 is reduced, thereby helping to increase the time for the particle sensor 204 to detect the lubricating oil per unit area.

[0028] See also Figure 5 The circulation assembly shown in the figure includes a circulation pipe 301 fixedly connected to the side of the L-shaped pipe 201 close to the fan blade 103, the circulation pipe 301 is slidably connected to the circulation rod 302, and one end of the circulation rod 302 located inside the circulation pipe 301 is fixedly connected to the circulation plate 303, the gearbox 104 is provided with a driving assembly for driving the circulation plate 303, and two one-way valves 304 are provided in the L-shaped pipe 201. The two one-way valves 304 are located on both sides of the circulation pipe 301, and the conduction direction of the two one-way valves 304 is from the inside to the outside of the gearbox 104;

[0029] It should be noted here that: through the setting of the circulation component, the lubricating oil in the gearbox 104 can circulate from the bottom to the top, thereby realizing the circulation detection of the lubricating oil. At the same time, since there is a certain amount of oil circulating in the circulation pipeline, in order to ensure the lubrication of the gear parts by the lubricating oil in the gearbox 104, the lubricating oil in the gearbox 104 can be appropriately increased.

[0030] See also Figure 3 and Figure 4 The driving assembly shown in the figure includes a fixed plate 401 fixedly connected to the side of the gearbox 104 close to the fan blade 103, the fixed plate 401 is rotatably connected to the driving rod 402, the driving rod 402 is fixedly connected to the side close to the circulation pipe 301 with a driving ring 403, the side wall of the driving ring 403 is fixedly connected with a plurality of triangular plates 404, and the gearbox 104 is provided with a rotating assembly for rotating the driving ring 403;

[0031] It should be noted here that: by setting the driving component, it is convenient to push the circulation plate 303 to move reciprocatingly in the circulation pipe 301.

[0032] See also Figure 3 and Figure 4 The circulation rod 302 shown in the figure is provided with a reset assembly for resetting the circulation plate 303, and the reset assembly includes a reset ring 501 fixedly connected to the side wall of the circulation rod 302, and the side wall of the circulation rod 302 is sleeved with a spring 502, and the two ends of the spring 502 are respectively connected to the reset ring 501 and the side wall of the circulation pipe 301;

[0033] It should be noted here that: by setting the reset component, a reset function is provided for the movement of the circulation rod 302.

[0034] Working principle: When the wind turbine is in use, the fan blades 103 use the aerodynamic principle to convert the power of wind into rotational power, and transmit it to the gearbox 104 through the input shaft 105. The gearbox 104 can convert the low-speed rotational power into high-speed rotational power and transmit it to the generator body 106 through the output shaft. The generator body 106 uses the electromagnetic induction principle to convert mechanical energy into electrical energy, thereby completing the power generation principle of the wind turbine. This is only briefly described here. As an existing public technology, it will not be described in too much detail;

[0035] At the same time, during the rotation of the input shaft 105, the driving rod 402 is driven to rotate by the rotating assembly. During the rotation of the driving rod 402, the multiple triangular plates 404 on the side wall of the driving ring 403 are driven to rotate. During the rotation of each triangular plate 404, each triangular plate 404 will reciprocate against the circulation rod 302, so that under the driving force and the elastic action of the reset assembly, the circulation plate 303 at one end of the circulation rod 302 reciprocates in the circulation pipe 301. During the reciprocating movement of the circulation plate 303, the pressure difference and the one-way blocking of the one-way valve 304 are used. In use, the lubricating oil in the gearbox 104 is continuously extracted from the bottom of the gearbox 104, and flows back from the top of the gearbox 104 through the detection tube 202 and the connecting tube 203. When the lubricating oil flows from the detection tube 202, the content and size of the solid particles in the oil are detected under the detection action of the particle sensor 204, so as to further realize the diagnosis of the gear failure in the gearbox 104. The detection under the circulation flow of the oil is helpful to improve the comprehensiveness of the impurity detection in the oil, thereby further improving the accuracy of the fault detection of the wind turbine gearbox 104.

[0036] Example 2

[0037] See also Figure 4, this embodiment further explains Example 1, the rotating assembly in the figure includes a mounting frame 601 fixedly connected to the gearbox 104 near the driving rod 402, the mounting frame 601 is connected to a rotating wheel 603 through a rotating shaft 602, the rotating wheel 603 is against the side wall of the input shaft 105, one end of the rotating shaft 602 passes through the mounting frame 601 and is fixedly connected to a first bevel gear 604, the other end of the driving rod 402 is fixedly connected to a second bevel gear 605, and the first bevel gear 604 and the second bevel gear 605 are meshed with each other;

[0038] It should be noted here that: through the setting of the rotating component, in the process of the fan blades 103 driving the input shaft 105 to rotate, the rotating wheel 603 is driven to rotate. In the process of the rotating wheel 603 rotating, the mutual meshing transmission effect of the first bevel gear 604 and the second bevel gear 605 is utilized to drive the driving rod 402 to rotate. The diameter of the rotating wheel 603 is smaller than the diameter of the input shaft 105, and the number of teeth of the first bevel gear 604 is several times the number of teeth of the second bevel gear 605, thereby improving the speed ratio of the rotation of the driving rod 402. At the same time, the rotation of the fan blades 103 is utilized to drive the driving rod 402 to rotate, thereby further realizing the circulation detection of the lubricating oil, thereby reducing the cost of the lubricating oil circulation detection.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A fault diagnosis device for a wind turbine, comprising: A nacelle (102) is arranged on a mounting rod (101), one side of the nacelle (102) is connected to a plurality of fan blades (103) via an input shaft (105), a gearbox (104) is arranged in the nacelle (102), one end of the input shaft (105) is connected to the gearbox (104), and an output shaft of the gearbox (104) is connected to a generator body (106); It is characterized by further comprising: A detection component disposed in the gearbox (104) for detecting the oil inside the gearbox; The detection component comprises an L-shaped tube (201) fixedly connected to the bottom of a gearbox (104); the other end of the L-shaped tube (201) is fixedly connected to a detection tube (202); one end of the detection tube (202) away from the L-shaped tube (201) is connected to a connecting tube (203); the other end of the connecting tube (203) is located at the top of the gearbox (104); the detection tube (202) is provided with a particle sensor (204); and the L-shaped tube (201) is provided with a circulation component for circulating lubricating oil in the gearbox (104).

2. A fault diagnosis device for a wind turbine according to claim 1, characterized in that: The diameter of the detection tube (202) is larger than the diameters of the L-shaped tube (201) and the connecting tube (203).

3. A fault diagnosis device for a wind turbine according to claim 1, characterized in that: The circulation component comprises a circulation pipe (301) fixedly connected to a side of the L-shaped pipe (201) close to the fan blade (103); the circulation pipe (301) is slidably connected to a circulation rod (302); one end of the circulation rod (302) located inside the circulation pipe (301) is fixedly connected to a circulation plate (303); the gearbox (104) is provided with a driving component for driving the circulation plate (303); two one-way valves (304) are provided inside the L-shaped pipe (201); the two one-way valves (304) are located on both sides of the circulation pipe (301).

4. A fault diagnosis device for a wind turbine according to claim 3, characterized in that: The driving assembly comprises a fixing plate (401) fixedly connected to a side of the gearbox (104) close to the fan blade (103); the fixing plate (401) is rotatably connected to a driving rod (402); a side of the driving rod (402) close to the circulation pipe (301) is fixedly connected to a driving ring (403); a side wall of the driving ring (403) is fixedly connected to a plurality of triangular plates (404); and the gearbox (104) is provided with a rotating assembly for rotating the driving ring (403).

5. A fault diagnosis device for a wind turbine according to claim 4, characterized in that: The circulation rod (302) is provided with a reset assembly for resetting the circulation plate (303), and the reset assembly comprises a reset ring (501) fixedly connected to the side wall of the circulation rod (302), and the side wall of the circulation rod (302) is sleeved with a spring (502), and the two ends of the spring (502) are respectively connected to the reset ring (501) and the side wall of the circulation pipe (301).

6. A fault diagnosis device for a wind turbine according to claim 4, characterized in that: The rotating assembly comprises a mounting frame (601) fixedly connected to a side of the gearbox (104) close to the driving rod (402); the mounting frame (601) is connected to a rotating wheel (603) via a rotating shaft (602); the rotating wheel (603) abuts against a side wall of an input shaft (105); one end of the rotating shaft (602) passes through the mounting frame (601) and is fixedly connected to a first bevel gear (604); the other end of the driving rod (402) is fixedly connected to a second bevel gear (605); the first bevel gear (604) and the second bevel gear (605) are meshed with each other.

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