A wind turbine bearing fault detection device

Abstract

The application discloses a kind of wind generator bearing fault detection devices, it is related to bearing fault detection technical field, including tower, is fixed on ground;Base is fixed on the upper end surface of the tower;Shell, rotation is arranged on the upper end surface of the base;Rotary shell, rotation is arranged in one end of the shell;Main shaft, rotation is arranged in the shell using bearing assembly, and the bearing assembly includes bearing seat and bearing, one end of the main shaft is fixedly connected with the rotary shell;Adjusting shaft, rotation is arranged in the main shaft, and the end close to the rotary shell is fixed with mounting piece, three blades are installed using bevel gear set on the mounting piece, and the adjusting shaft is driven by adjusting motor fixed in the shell;Power generation equipment, fixed in the shell, and located below the adjusting motor, the power generation equipment is engaged transmission using gear with the main shaft;Detection component, installed on the outer wall of the main shaft, and is fixedly connected with the shell.

Description

Technical Field

[0001] This invention relates to the field of bearing fault detection technology, specifically a wind turbine bearing fault detection device. Background Technology

[0002] Wind turbine generators typically operate in harsh environments with complex and variable loads. As a core rotating component, the health of bearings directly affects the unit's operational safety and power generation efficiency. Existing bearing fault detection devices mostly employ vibration analysis methods, using sensors fixed to the bearing housing to collect and analyze vibration signals.

[0003] Existing detection technologies have the following problems: Signal path attenuation: The sensor is fixed to the bearing housing, and the fault signal needs to be transmitted through multiple interfaces of rolling element → outer ring → bearing housing, resulting in severe attenuation of high-frequency components and difficulty in identifying early faults; The main shaft of the fan undergoes axial thermal expansion (up to several millimeters) and radial flexural deformation during operation, and traditional rigid mounting brackets are prone to sensor damage or signal distortion; Load interference is difficult to eliminate: Changes in normal operating conditions such as sudden wind speed changes and gust impacts can cause an increase in vibration amplitude, which is difficult to distinguish from bearing fault signals, resulting in a high false alarm rate.

[0004] To address the above problems, this invention provides a wind turbine bearing fault detection device to solve these issues. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine bearing fault detection device, comprising:

[0006] The tower is fixed to the ground.

[0007] The base is fixed to the upper surface of the tower.

[0008] The housing is rotatably mounted on the upper end face of the base;

[0009] Rotate the housing, which is rotatably located at one end of the housing;

[0010] The main shaft is rotatably mounted inside the housing using a bearing assembly, and the bearing assembly includes a bearing housing and a bearing. One end of the main shaft is fixedly connected to the rotating housing.

[0011] An adjusting shaft is rotatably mounted inside the main shaft. A mounting component is fixed at one end near the rotating housing. Three blades are mounted on the mounting component using a bevel gear set. The adjusting shaft is driven by an adjusting motor fixed inside the housing.

[0012] The power generation device is fixed inside the housing and located below the regulating motor. The power generation device is driven by gears meshing with the main shaft.

[0013] The detection component is mounted on the outer wall of the spindle and is fixedly connected to the housing.

[0014] Furthermore, preferably, a fixed gear is installed inside the base, and multiple steering motors are fixed inside the housing, with each of the multiple steering motors meshing with the fixed gear using gears.

[0015] Furthermore, preferably, a support block is also fixed inside the housing, and a buffer block is slidably disposed on the upper end surface of the support block. The buffer block contacts and supports the outer wall of the main shaft, and the support block is located between the bearing assembly and the mounting component.

[0016] Further, preferably, the detection component includes:

[0017] The support base is fixed inside the housing;

[0018] Press the half ring to fix it to the upper end face of the support base, and together with the support base, form a ring-shaped support chamber;

[0019] The follower base is fixed to the outer wall of the main shaft;

[0020] The first compensation component and the second compensation component are symmetrically arranged on the outer wall of the follower substrate.

[0021] Further, preferably, the follower base includes a first half-ring and a second half-ring, the first half-ring and the second half-ring are connected by bolts, and the first half-ring corresponds to the first compensation component, and the second half-ring corresponds to the second compensation component;

[0022] The inner walls of the support base and the pressing half-ring are provided with multiple half-ring grooves.

[0023] Furthermore, preferably, multiple load sensing modules are uniformly installed on the inner walls of the first and second semi-rings. The load sensing modules are pressure sensors, and the pressure sensors are directly attached to the surface of the spindle.

[0024] Furthermore, preferably, both the first compensation component and the second compensation component include:

[0025] The compensation rod is slidably disposed on the outer wall of the follower base;

[0026] Multiple balls are configured to roll on one end face of the compensating rod near the follower base, and a pressing spring is provided between them and the compensating rod;

[0027] Multiple support plates are configured and equidistantly arranged on the end face of the compensation rod away from the follower base, and each plate corresponds to one of the multiple semi-annular grooves.

[0028] The roller is rotatably mounted on the support plate and located within the semi-annular groove.

[0029] Furthermore, preferably, the support plate and the compensation rod are slidably connected, and a buffer spring is provided between them. One end of the compensation rod extends to a position close to the outer ring end face of the bearing and is fixed with a laser vibration measurement unit.

[0030] Compared with the prior art, the present invention provides a wind turbine bearing fault detection device, which has the following beneficial effects:

[0031] In this invention, the follower base of the detection component is fixed to the outer wall of the spindle and rotates synchronously with the spindle to achieve 360° full coverage scanning of the bearing. The roller on the compensation rod rolls with the semi-annular groove of the support seat, which allows the compensation rod to rotate with the spindle (circular motion) and restricts the axial displacement of the compensation rod through the axial constraint of the semi-annular groove, so that the relative position of the detection element and the bearing remains constant, effectively compensating for the axial movement caused by the thermal expansion of the spindle, ensuring stable and continuous signal, and the pressing spring can eliminate the sliding gap and avoid the direct transmission of vibration caused by hard pressing.

[0032] The pressure sensor embedded in the inner wall of the follow-up base is directly attached to the surface of the main shaft to monitor the radial load distribution in real time. Combined with the laser vibration measurement unit installed at the front end of the compensation rod, the load and vibration signal are fused and analyzed, which can accurately distinguish between bearing failure and sudden changes in wind speed and other operating conditions, and significantly reduce the false alarm rate. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention;

[0035] Figure 3 This is a schematic diagram of the detection component structure of the present invention;

[0036] Figure 4 This is a schematic diagram of the follower substrate structure of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the first compensation component of the present invention;

[0038] In the diagram: 1. Base; 2. Housing; 3. Rotating housing; 4. Bearing assembly; 5. Main shaft; 6. Adjusting shaft; 7. Power generation equipment; 8. Support block; 9. Detection assembly; 11. Fixed gear; 12. Steering motor; 41. Bearing seat; 42. Bearing; 61. Mounting component; 62. Adjusting motor; 91. Support seat; 92. Pressing half-ring; 93. Follower base; 94. First compensation assembly; 95. Second compensation assembly; 911. Half-ring groove; 931. Pressure sensor; 941. Compensation rod; 942. Ball bearing; 943. Support plate; 944. Roller. Detailed Implementation

[0039] Reference Figures 1-5 This invention provides a technical solution: a wind turbine bearing fault detection device, comprising:

[0040] The tower is fixed to the ground.

[0041] Base 1 is fixed to the upper end face of the tower;

[0042] The housing 2 is rotatably mounted on the upper end surface of the base 1;

[0043] Rotate the housing 3 so that it is rotatably mounted at one end of the housing 2;

[0044] The main shaft 5 is rotatably mounted inside the housing 2 using a bearing assembly 4, and the bearing assembly 4 includes a bearing seat 41 and a bearing 42. One end of the main shaft 5 is fixedly connected to the rotating housing 3.

[0045] The adjusting shaft 6 is rotatably disposed inside the main shaft 5. A mounting piece 61 is fixed at one end near the rotating housing 3. Three blades are mounted on the mounting piece 61 using a bevel gear set. The adjusting shaft 6 is driven by an adjusting motor 62 fixed inside the housing 2.

[0046] The power generation device 7 is fixed inside the housing 2 and located below the regulating motor 62. The power generation device 7 is driven by gear meshing with the main shaft 5.

[0047] The detection component 9 is installed on the outer wall of the main shaft 5 and is fixedly connected to the housing 2.

[0048] Among them, the detection component 9 is located close to the fault source of bearing 42, which shortens the signal transmission path, improves the sensitivity of early fault detection, and is integrated into the existing structure, making it easy to modify on site without changing the main drive chain.

[0049] In this embodiment, a fixed gear 11 is installed inside the base 1, and multiple steering motors 12 are fixed inside the housing 2. All of the multiple steering motors 12 are engaged with the fixed gear 11 by gears.

[0050] In other words, the yaw drive mechanism is formed by the fixed gear 11 and multiple steering motors 12, which enables the housing 2 to rotate relative to the base 1, realizes automatic wind alignment of the blades, improves wind energy capture efficiency, and the multiple steering motors can enhance the reliability of the system.

[0051] Preferably, a support block 8 is fixed inside the housing 2, and a buffer block is slidably disposed on the upper end surface of the support block 8. The buffer block contacts and supports the outer wall of the main shaft 5, and the support block 8 is located between the bearing assembly 4 and the mounting part 61.

[0052] In addition, an auxiliary support is added to the front end of the bearing assembly 4 to provide additional radial constraint to the spindle 5, share the radial load of the bearing 42, and extend the life of the bearing 42. The buffer block is set to be sliding to adapt to the deformation and vibration of the spindle 5 and avoid additional stress.

[0053] In this embodiment, the detection component 9 includes:

[0054] Support base 91 is fixed inside the housing 2;

[0055] Press the semi-ring 92 to fix it to the upper end face of the support base 91, and together with the support base 91, form a ring-shaped support chamber;

[0056] The follower base 93 is fixed to the outer wall of the main shaft 5;

[0057] The first compensation component 94 and the second compensation component 95 are symmetrically arranged on the outer wall of the follower base 93.

[0058] Among them, the annular support chamber provides an installation base and limit track for the compensation component. The follower base 93 rotates with the main shaft 5 to achieve 360° scanning. The symmetrical structure balances the force and improves the measurement redundancy and accuracy.

[0059] In addition, the follower base 93 includes a first half ring and a second half ring, the first half ring and the second half ring are connected by bolts, and the first half ring corresponds to the first compensation component 94, and the second half ring corresponds to the second compensation component 95.

[0060] The inner walls of the support base 91 and the pressing half-ring 92 are provided with a plurality of half-ring grooves 911.

[0061] It should be noted that the split structure can be installed on-site without disassembling the main spindle 5, which greatly reduces the difficulty of construction.

[0062] In a preferred embodiment, multiple load sensing modules are uniformly installed on the inner walls of the first and second half-rings. The load sensing modules are pressure sensors 931, which are directly attached to the surface of the spindle 5.

[0063] In other words, by fusing load data with vibration signals, it is possible to distinguish between bearing 42 failure and vibration caused by changes in operating conditions, thereby reducing the false alarm rate.

[0064] In a preferred embodiment, both the first compensation component 94 and the second compensation component 95 include:

[0065] The compensation rod 941 is slidably disposed on the outer wall of the follower base 93;

[0066] Multiple balls 942 are configured to roll and are rolled on one end face of the compensation rod 941 near the follower base 93, and a pressing spring is provided between them and the compensation rod 941;

[0067] Multiple support plates 943 are configured and are equidistantly arranged on one end face of the compensation rod 941 away from the follower base 93, and correspond one-to-one with the multiple semi-annular grooves 911;

[0068] Roller 944 is rotatably mounted on the support plate 943 and located within the semi-annular groove 911.

[0069] In addition, the ball bearing 942 and the pressing spring ensure that the sliding pair is without clearance and isolates high-frequency vibration. The roller 944 and the semi-annular groove 911 convert the axial movement of the main shaft 5 into sliding relative to the compensating rod 941, so that the axial position of the laser vibration measurement unit and the bearing 42 remains constant. Rolling friction reduces wear and improves service life.

[0070] Preferably, the support plate 943 and the compensation rod 941 are slidably connected, and a buffer spring is provided between them. One end of the compensation rod extends to a position close to the outer ring end face of the bearing and is fixed with a laser vibration measurement unit.

[0071] Among them, a secondary buffer is added between the compensation rod 941 and the support plate 943 to absorb the impact.

[0072] The high-frequency vibration generated between the rotating substrate 93 and the semi-annular groove 911 further improves the accuracy of detection and reduces the false alarm rate.

[0073] In practice, after the detection component 9 is installed in the housing 2, the laser vibration measurement unit is aligned with the outer ring end face of the bearing 42 to directly monitor the vibration generated when the inner ring of the bearing 42 rotates. When the main shaft 5 moves to the right due to thermal expansion, the follower base 93 moves to the right synchronously. Since the roller 944 is constrained by the semi-annular groove 911, the roller 944 cannot move to the right. Thus, the support plate 943 drives the compensation rod 941 to slide to the left relative to the follower base 93, so that the axial relative position between the laser vibration measurement unit installed at the front end of the compensation rod and the bearing 42 remains unchanged. The same applies when moving to the left. The buffer spring absorbs the impact of rapid movement, and the ball and the pressing spring ensure smooth sliding without any backlash.

[0074] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wind turbine bearing fault detection device, characterized in that, include: The tower is fixed to the ground. The base (1) is fixed to the upper end face of the tower; The housing (2) is rotatably disposed on the upper end surface of the base (1); Rotate the shell (3) to rotate one end of the shell (2); The main shaft (5) is rotatably mounted in the housing (2) using a bearing assembly (4), and the bearing assembly (4) includes a bearing seat (41) and a bearing (42). One end of the main shaft (5) is fixedly connected to the rotating housing (3). The adjusting shaft (6) is rotatably disposed inside the main shaft (5), and a mounting piece (61) is fixed at one end near the rotating housing (3). Three blades are mounted on the mounting piece (61) using a bevel gear set, and the adjusting shaft (6) is driven by an adjusting motor (62) fixed inside the housing (2). The power generation device (7) is fixed inside the housing (2) and located below the regulating motor (62). The power generation device (7) is driven by gear meshing with the main shaft (5). The detection component (9) is installed on the outer wall of the main shaft (5) and is fixedly connected to the housing (2).

2. The wind turbine bearing fault detection device according to claim 1, characterized in that, A fixed gear (11) is installed inside the base (1), and multiple steering motors (12) are fixed inside the housing (2). All of the multiple steering motors (12) are meshed with the fixed gear (11) using gears.

3. The wind turbine bearing fault detection device according to claim 1, characterized in that, Inside the housing (2), there is also a support block (8). A buffer block is slidably provided on the upper end surface of the support block (8). The buffer block contacts and supports the outer wall of the main shaft (5). The support block (8) is located between the bearing assembly (4) and the mounting part (61).

4. The wind turbine bearing fault detection device according to claim 1, characterized in that, The detection component (9) includes: The support base (91) is fixed inside the housing (2); Press the half ring (92) to fix it to the upper end face of the support base (91), and together with the support base (91) form a ring support chamber; The follower base (93) is fixed to the outer wall of the main shaft (5); The first compensation component (94) and the second compensation component (95) are symmetrically arranged on the outer wall of the follower substrate (93).

5. A wind turbine bearing fault detection device according to claim 4, characterized in that, The follower base (93) includes a first half ring and a second half ring, the first half ring and the second half ring are connected by bolts, and the first half ring corresponds to the first compensation component (94), and the second half ring corresponds to the second compensation component (95); The inner walls of the support base (91) and the pressing half-ring (92) are provided with a plurality of half-ring grooves (911).

6. The wind turbine bearing fault detection device according to claim 5, characterized in that, Multiple load sensing modules are uniformly installed on the inner walls of the first and second half rings. The load sensing modules are pressure sensors (931), and the pressure sensors (931) are directly attached to the surface of the spindle (5).

7. A wind turbine bearing fault detection device according to claim 5, characterized in that, Both the first compensation component (94) and the second compensation component (95) include: The compensation rod (941) is slidably disposed on the outer wall of the follower base (93); Multiple balls (942) are configured to roll on one end face of the compensating rod (941) near the follower base (93), and a pressing spring is provided between the ball and the compensating rod (941); Support plates (943) are configured in multiple ways, equidistantly arranged on one end face of the compensation rod (941) away from the follower base (93), and correspond one-to-one with the multiple semi-annular grooves (911); The roller (944) is rotatably mounted on the support plate (943) and located within the semi-annular groove (911).

8. A wind turbine bearing fault detection device according to claim 7, characterized in that, The support plate (943) and the compensation rod (941) are slidably connected, and a buffer spring is provided between them. One end of the compensation rod (941) extends to a position close to the outer ring end face of the bearing (42) and is fixed with a laser vibration measurement unit.

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