A wind turbine generator shaft alignment monitoring and adjustment device

Abstract

The present invention belongs to the technical field of wind turbines and discloses a wind turbine shaft alignment monitoring and adjustment device, comprising a power generation assembly, including a base, a speed increaser, a power generation mechanism, and a coupling. The speed increaser and the power generation mechanism are both fixedly mounted on the base, and the speed increaser is connected to the power generation mechanism via a coupling; the power generation mechanism is composed of a generator set, a support, a shock-absorbing bracket, and a support plate. The present invention applies four magnetic repulsive forces with a resultant force of zero to the output shaft of the generator set. When the input shaft of the generator set drives the active magnetic assembly to rotate, the state of zero resultant force is broken. The magnetic repulsive force is automatically changed by the different positions generated by the offset of the first permanent magnet block to the second permanent magnet block, thereby automatically pushing the input shaft of the generator set toward its original axis, so that the input shaft of the generator set can be synchronously adjusted and returned to the center when the input shaft of the generator set rotates, thereby reducing the hysteresis of the device adjustment.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind turbines, and in particular relates to a shaft alignment monitoring and adjustment device for a wind turbine generator set. Background Art

[0002] Shaft alignment refers to the axis alignment positioning operation. In a wind turbine, the power generated by the rotation of the fan blades after being blown by the wind will be transmitted to the wind turbine through the speed increaser and the coupling. Since the generator and the speed increaser will generate vibration during operation, the input shaft of the generator and the output shaft of the speed increaser will have an axis deviation. If the deviation cannot be controlled within a certain safe range, wear will occur. Therefore, in the prior art, a combination of voltage difference monitoring and dynamic adjustment of the hydraulic rod is usually adopted to perform the axis alignment operation between the input shaft of the generator and the output shaft of the speed increaser. When the shaft deviates, the electrical signal sensor on its surface for monitoring will generate a signal, and then the hydraulic rod is controlled to drive the generator chassis to move to complete the adaptation. However, this also exposes a disadvantage: monitoring comes first and adjustment comes later, which is prone to produce a large hysteresis in actual work, because the input shaft of the motor deviates, and under the condition of rotation, its deviation state will change in a very short time. At this time, the adaptation state after adjustment will have a large deviation. Therefore, the present invention is committed to designing a real-time monitoring and adjustment device to overcome the above-mentioned defects. Summary of the Invention

[0003] The object of the present invention is to provide a wind turbine generator set shaft alignment monitoring and adjustment device to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wind turbine shaft alignment monitoring and adjustment device, comprising

[0005] The power generation assembly includes a base, a speed increasing gearbox, a power generation mechanism and a coupling. The speed increasing gearbox and the power generation mechanism are fixedly mounted on the base, and the speed increasing gearbox is connected to the power generation mechanism through the coupling.

[0006] The power generation mechanism consists of a generator set, a support, a shock-absorbing bracket and a support plate. The input shaft of the generator set is connected to the output shaft of the speed increaser through a coupling. The upper and lower ends of the shock-absorbing bracket are movably hinged to the support and the support plate in turn.

[0007] The monitoring and regulating mechanism includes a bracket, a fixed ring and a movable magnetic assembly. The inner ring surface of the fixed ring is equipped with multiple groups of fixed magnetic assemblies. The movable magnetic assembly is fixedly sleeved on the output shaft of the generator set.

[0008] The fixed magnetic assembly includes a fixed cylinder, which is fixedly connected to the inner ring surface of the fixed ring. The fixed cylinder has a placement groove at one end facing the movable magnetic assembly and is glued with an adapter ring. A pressure sensor is fixedly installed in the placement groove. A permanent magnet block No. 1 is also movably sleeved in the interior of the fixed cylinder.

[0009] The movable magnetic assembly includes a fixed sleeve, the outer circumference of the fixed sleeve is provided with multiple groups of slots, and the inner part of the slot is fixedly sleeved with a second permanent magnet block, and the fixed sleeve is fixedly sleeved on the output shaft of the generator set.

[0010] Preferably, the shock-absorbing bracket is arranged in four groups and is distributed at equal angles between the support and the support plate, including a telescopic rod, the bottom end and the telescopic end of the telescopic rod are respectively installed with a No. 1 limiting ring and a No. 2 limiting ring, and the outer surface of the telescopic rod is movably sleeved with a spring, and the two ends of the spring are elastically connected to the No. 1 limiting ring and the No. 2 limiting ring respectively.

[0011] Preferably, the bracket is composed of a group of transverse plates and two groups of support columns, the top ends of the support columns are fixedly connected to the bottom of the outer surface of the fixing ring, and the axis of the fixing ring is collinear with the axis of the generator set.

[0012] Preferably, the first permanent magnet block and the second permanent magnet block are each in groups of four, and are distributed at equal angles on the inner surface of the fixing ring at positions of 0°, 90°, 180° and 270° based on the axis of the fixing ring.

[0013] Preferably, the opposite ends of the No. 1 permanent magnet block and the No. 2 permanent magnet block are in a distribution state of like-charge repulsion, and the pressures of the four groups of No. 1 permanent magnet blocks on the entire active magnetic assembly are Fright, Fup, Fleft and Fdown respectively.

[0014] Preferably, the adapter ring is made of a rubber block and is arranged on the outer surface of the first permanent magnet block in an interference fit, and the end of the first permanent magnet block facing the pressure sensor is in press contact with the pressure sensor.

[0015] Preferably, the spring is compressed and arranged between the first limiting ring and the second limiting ring, and the telescopic rod is a damping rod.

[0016] Preferably, the cross-section of the No. 1 permanent magnet is T-shaped, and a gap is left between the end of the protruding end of the No. 1 permanent magnet facing the fixed cylinder and the adapter ring.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. A power generation mechanism is provided to eliminate the vibration generated by the generator set during operation, so that it can run smoothly. Then, a monitoring and adjustment mechanism is provided to apply magnetic repulsion to the output shaft of the generator set. When the device is in the initial condition, four magnetic repulsive forces with a resultant force of zero are applied to the output shaft of the generator set. When the input shaft of the generator set drives the active magnetic component to rotate, the state of zero resultant force is broken, and the different positions generated by the offset of the No. 1 permanent magnet block to the No. 2 permanent magnet block are automatically changed, thereby automatically changing the magnetic repulsion, thereby automatically pushing the input shaft of the generator set toward its original axis, so that the input shaft of the generator set can be synchronously adjusted and returned to the center when the input shaft rotates, thereby reducing the hysteresis of the device adjustment.

[0019] 2. A shock-absorbing bracket is provided to provide shock-absorbing support for the generator set and the support. When the generator set is running, vibration will be generated, which applies pressure to the telescopic rod through the support. The telescopic end of the telescopic rod is extended and retracted according to the adjustment of the monitoring and adjustment mechanism and the combined force of the generator set itself. The damping force generated inside the telescopic rod eliminates the vibration of the generator set, and is supported and properly reset through the No. 1 limit ring, cooperating with the radial pressure applied to the generator set as a whole by the monitoring and adjustment mechanism, so that the generator set can work more smoothly.

[0020] 3. After the generator set drives the movable magnetic assembly to rotate 90° as a whole, the axes of the No. 2 permanent magnet block and the No. 1 permanent magnet block are re-aligned. At this time, if the offset of the input shaft of the generator set is not large, that is, the resultant force of the four magnetic repulsive forces exerted by the fixed magnetic assembly on the movable magnetic assembly and the generator set is zero, the pressure on each group of No. 1 permanent magnet blocks is the same, which is recorded by the pressure sensor. Otherwise, the resultant force is not zero. At this time, the pressure on each group of No. 1 permanent magnet blocks is different, which is recorded by the pressure sensor. The pressure values ​​of the pressure sensor are different, thereby performing periodic monitoring and improving monitoring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the front three-dimensional appearance of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the front plan appearance of the structure of the present invention;

[0023] Figure 3 It is a bottom schematic diagram of the structure of the present invention;

[0024] Figure 4 A side cross-sectional schematic diagram of the monitoring and adjusting mechanism of the present invention;

[0025] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at center A;

[0026] Figure 6 This is a schematic diagram of the separation of the monitoring and regulating mechanism of the present invention;

[0027] Figure 7 A partial diagram showing the power generation mechanism of the present invention;

[0028] Figure 8 Schematic diagram of force analysis of the fixed magnetic component and the movable magnetic component of the present invention.

[0029] In the figure: 1. Base; 2. Speed ​​increaser; 3. Power generation mechanism; 31. Generator set; 32. Support; 33. Shock-absorbing bracket; 331. Telescopic rod; 332. Limiting ring No. 1; 333. Limiting ring No. 2; 334. Spring; 34. Support plate; 4. Coupling; 5. Monitoring and adjustment mechanism; 51. Bracket; 52. Fixed ring; 53. Fixed magnetic assembly; 531. Fixed cylinder; 532. Placement slot; 533. Pressure sensor; 534. Permanent magnet No. 1; 535. Adapter ring; 54. Movable magnetic assembly; 541. Fixed sleeve; 542. Slot; 543. Permanent magnet No. 2. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0031] like Figures 1 to 8 As shown, the embodiment of the present invention provides a wind turbine generator shaft alignment monitoring and adjustment device, comprising

[0032] The power generation assembly includes a base 1, a speed increasing gearbox 2, a power generation mechanism 3 and a coupling 4. The speed increasing gearbox 2 and the power generation mechanism 3 are both fixedly mounted on the base 1, and the speed increasing gearbox 2 is connected to the power generation mechanism 3 through the coupling 4.

[0033] The power generation mechanism 3 consists of a generator set 31, a support 32, a shock-absorbing bracket 33, and a support plate 34. The input shaft of the generator set 31 is connected to the output shaft of the speed increaser 2 through a coupling 4. The upper and lower ends of the shock-absorbing bracket 33 are hinged to the support 32 and the support plate 34 in turn.

[0034] The monitoring and regulating mechanism 5 includes a bracket 51, a fixed ring 52, and a movable magnetic assembly 54. The inner ring surface of the fixed ring 52 is equipped with multiple groups of fixed magnetic assemblies 53. The movable magnetic assembly 54 is fixedly sleeved on the output shaft of the generator set 31.

[0035] The fixed magnetic assembly 53 includes a fixed cylinder 531, which is fixedly connected to the inner surface of the fixed ring 52. The fixed cylinder 531 has a placement groove 532 at one end facing the movable magnetic assembly 54, and is glued with an adapter ring 535. The pressure sensor 533 is fixedly installed in the placement groove 532. The fixed cylinder 531 also has a first permanent magnet 534 movably mounted therein.

[0036] The movable magnetic assembly 54 includes a fixed sleeve 541. The outer surface of the fixed sleeve 541 is provided with a plurality of slots 542. The inner portion of the slots 542 is fixedly sleeved with a second permanent magnet 543. The fixed sleeve 541 is fixedly sleeved on the output shaft of the generator set 31.

[0037] By providing a power generation mechanism 3, the vibration generated by the generator set 31 during operation is eliminated, so that it can run smoothly. Then, by providing a monitoring and adjustment mechanism 5, a magnetic repulsive force is applied to the output shaft of the generator set 31. When the device is in the initial condition, four magnetic repulsive forces with a resultant force of zero are applied to the output shaft of the generator set 31. When the input shaft of the generator set 31 drives the active magnetic component 54 to rotate, the state of zero resultant force is broken, and the different positions generated by the offset of the No. 1 permanent magnet block 534 to the No. 2 permanent magnet block 543 are automatically changed, thereby automatically changing the magnetic repulsive force, thereby automatically pushing the input shaft of the generator set 31 toward its original axis, so that the input shaft of the generator set 31 can be synchronously adjusted and returned to the center when the input shaft rotates, thereby reducing the lag of the device adjustment.

[0038] After the generator set 31 drives the active magnetic assembly 54 to rotate 90° as a whole, the axial directions of the No. 2 permanent magnet block 543 and the No. 1 permanent magnet block 534 are re-aligned. At this time, if the offset of the input shaft of the generator set 31 is not large, that is, the resultant force of the four magnetic repulsive forces exerted by the fixed magnetic assembly 53 on the active magnetic assembly 54 and the generator set 31 is zero, the pressure on each group of No. 1 permanent magnet blocks 534 is the same, which is recorded by the pressure sensor 533. Otherwise, the resultant force is not zero. At this time, the pressure on each group of No. 1 permanent magnet blocks 534 is different, which is recorded by the pressure sensor 533. The pressure values ​​of the pressure sensor 533 are different, thereby performing periodic monitoring and improving monitoring efficiency.

[0039] The shock-absorbing brackets 33 are arranged in four groups and are distributed at equal angles between the support 32 and the support plate 34. They include telescopic rods 331. The bottom and telescopic ends of the telescopic rods 331 are respectively equipped with a first limiting ring 332 and a second limiting ring 333. The outer surface of the telescopic rods 331 is movably sleeved with a spring 334. The two ends of the spring 334 are elastically connected to the first limiting ring 332 and the second limiting ring 333 respectively.

[0040] By providing a shock-absorbing bracket 33 to provide shock-absorbing support for the generator set 31 and the support 32, vibration will be generated when the generator set 31 is running, and pressure will be applied to the telescopic rod 331 through the support 32. The telescopic end of the telescopic rod 331 will be telescoped according to the adjustment of the monitoring and adjustment mechanism 5 and the combined force of the generator set 31 itself. The damping force generated inside the telescopic rod 331 eliminates the vibration of the generator set 31, and is supported and properly reset through the No. 1 limit ring 332, cooperating with the radial pressure applied to the generator set 31 as a whole by the monitoring and adjustment mechanism 5, so that the generator set 31 can work more smoothly.

[0041] The bracket 51 is composed of a set of horizontal plates and two sets of support columns. The top of the support column is fixedly connected to the bottom of the outer surface of the fixing ring 52. The axis of the fixing ring 52 is collinear with the axis of the generator set 31.

[0042] The fixing ring 52 is fixedly arranged and connected to the bracket 51 by welding. The bracket 51 is fixedly installed in the middle of the top of the base 1 and is located between the speed increaser 2 and the generator 3. The purpose is to provide support for the monitoring and adjustment mechanism 5, so that the axis of the fixing ring 52 is collinear with the axial direction of the input shaft of the generator set 31, thereby facilitating subsequent monitoring and adjustment.

[0043] The first permanent magnet block 534 and the second permanent magnet block 543 are both four groups, and are distributed at equal angles at positions of 0°, 90°, 180° and 270° on the inner surface of the fixing ring 52 with the axis of the fixing ring 52 as the reference;

[0044] The position of the second permanent magnet block 543 is Figure 8 The entire device and system are in the initial condition, which will change after the generator set 31 rotates, but each 90° rotation can re-form a distribution state with a resultant force of zero, making it easier for the shock-absorbing bracket 33 to adjust the shock-absorbing support of the entire generator set 31.

[0045] The opposite ends of the No. 1 permanent magnet block 534 and the No. 2 permanent magnet block 543 are in a distribution state of like-pole repulsion, and the pressures exerted by the four groups of No. 1 permanent magnet blocks 534 on the entire movable magnetic assembly 54 are F right, F up, F left and F down respectively;

[0046] The first permanent magnet block 534 generates a repulsive force of the same polarity on the second permanent magnet block 543, thereby exerting a comprehensive pressure on the active magnetic assembly 54 and the input shaft of the generator set 31, as shown in FIG. Figure 8 As shown, the resultant force generated is exactly zero, but when the input shaft of the generator set 31 is offset, the relative position of the second permanent magnet block 543 and the first permanent magnet block 534 will change. At this time, the resultant force is not zero, and the four like-sex repulsive forces will jointly exert pressure on the second permanent magnet block 543 and produce an effect, assisting the generator set 31 to return to the center or maintain it within a safer and more stable offset range.

[0047] The adapter ring 535 is made of a rubber block and is arranged on the outer surface of the first permanent magnet block 534 in an interference fit. The end of the first permanent magnet block 534 facing the pressure sensor 533 is in press contact with the pressure sensor 533.

[0048] like Figure 4 、 Figure 5 As shown, the No. 1 permanent magnet block 534 is movably inserted into the interior of the placement slot 532. It has an interference fit with the adapter ring 535, which generates an extrusion force that squeezes the adapter ring 535 inward, generates friction and fixes the No. 1 permanent magnet block 534. After the No. 1 permanent magnet block 534 is subjected to the magnetic repulsive force, it will exert pressure on the pressure sensor 533, thereby facilitating the pressure sensor 533 to monitor the pressure condition of the No. 1 permanent magnet block 534 in real time, and realize the monitoring function of the shaft alignment based on the readings of the four groups of pressure sensors 533.

[0049] The spring 334 is compressed and arranged between the first limiting ring 332 and the second limiting ring 333, and the telescopic rod 331 is a damping rod;

[0050] The spring 334 provides a restoring support force for the telescopic rod 331 as a whole. The telescopic rod 331 is pressurized and supported by the rebound force generated by the spring 334, so as to prevent the telescopic rod 331 from being unable to reset promptly when subjected to the pressure generated by the vibration and displacement of the generator set 31 and the support 32, thereby causing a larger displacement. Therefore, the spring 334 is a compression setting.

[0051] The cross-section of the first permanent magnet 534 is T-shaped, and a gap is left between the end of the protruding end of the first permanent magnet 534 facing the fixed cylinder 531 and the adapter ring 535.

[0052] The "T" shape design of the first permanent magnet block 534 can expand the contact surface with the opposite end of the second permanent magnet block 543, that is, the force area of ​​the magnetic repulsive force, which facilitates force balance and prevents deviation of the magnetic repulsive force.

[0053] Working principle and usage process:

[0054] First, the speed increaser 2 accelerates the power from the wind fan and transmits it to the generator set 31 through its output shaft and coupling 4. The output shaft of the generator set 31 rotates at high speed and generates electricity. The shock-absorbing bracket 33 and the support 32 provide dynamic support. Figure 8As shown, the four groups of No. 1 permanent magnets 534 respectively exert magnetic repulsive forces on their corresponding No. 2 permanent magnets 543: Fright, Fup, Fleft, and Fdown. The resultant force of the four repulsive forces is zero. Under this initial condition, these four magnetic repulsive forces automatically cause the fixing sleeve 541, the generator set 31, the support 32, and the shock-absorbing bracket 33 to deviate as a whole. At this time, the telescopic end of the telescopic rod 331 automatically retracts and expands under the pressure of Fright, Fup, Fleft, and Fdown, and generates a damping force. With the elastic cooperation of the spring 334, the angle of the generator set 31 is automatically adjusted, thereby resetting the deviation caused by vibration between the output shaft of the generator set 31 and the output shaft of the speed increaser 2.

[0055] Then, when the generator set 31 drives the movable magnetic assembly 54 to rotate as a whole, when the second permanent magnet block 543 and the first permanent magnet block 534 are offset, the overall stability of the generator set 31 depends on the damping force of the telescopic rod 331 and the spring 334, which can achieve dynamic offset with the gravity of the generator set 31, so that the offset of the input shaft of the generator set 31 is maintained within a certain range of variation. When the generator set 31 is offset, the pressure exerted by the second permanent magnet block 543 on each group of the first permanent magnet block 534 is monitored by the pressure sensor 533 and finally transmitted to the computer for easy monitoring.

[0056] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wind turbine shaft alignment monitoring and adjustment device, characterized by: include A power generation assembly comprises a base (1), a speed increasing gearbox (2), a power generation mechanism (3) and a coupling (4), wherein the speed increasing gearbox (2) and the power generation mechanism (3) are both fixedly mounted on the base (1), and the speed increasing gearbox (2) is transmission-connected to the power generation mechanism (3) via the coupling (4); The power generation mechanism (3) is composed of a generator set (31), a support (32), a shock-absorbing bracket (33) and a support plate (34); the input shaft of the generator set (31) is connected to the output shaft of the speed increaser (2) through a coupling (4); the upper and lower ends of the shock-absorbing bracket (33) are movably hinged to the support (32) and the support plate (34) in sequence; A monitoring and regulating mechanism (5) comprises a bracket (51), a fixed ring (52) and a movable magnetic assembly (54), wherein the inner ring surface of the fixed ring (52) is provided with a plurality of fixed magnetic assemblies (53), and the movable magnetic assembly (54) is fixedly sleeved on the output shaft of the generator set (31); The fixed magnetic assembly (53) includes a fixed cylinder (531) and is fixedly connected to the inner ring surface of the fixed ring (52). The fixed cylinder (531) is provided with a placement groove (532) at one end facing the movable magnetic assembly (54) and is glued with an adapter ring (535). A pressure sensor (533) is fixedly installed inside the placement groove (532). A permanent magnet block (534) is also movably sleeved inside the fixed cylinder (531). The movable magnetic assembly (54) includes a fixed sleeve (541), the outer peripheral surface of the fixed sleeve (541) is provided with a plurality of slots (542), and the interior of the slots (542) is fixedly sleeved with a second permanent magnet block (543), and the fixed sleeve (541) is fixedly sleeved on the output shaft of the generator set (31); The shock-absorbing bracket (33) is arranged in four groups and is tilted and distributed at equal angles between the support (32) and the support plate (34), and includes a telescopic rod (331). The bottom end and the telescopic end of the telescopic rod (331) are respectively provided with a first limiting ring (332) and a second limiting ring (333). The outer surface of the telescopic rod (331) is movably sleeved with a spring (334). The two ends of the spring (334) are respectively connected to the first limiting ring (332) and the second limiting ring (333). The bracket (51) is elastically connected and consists of a group of horizontal plates and two groups of support columns. The top of the support column is fixedly connected to the bottom of the outer surface of the fixed ring (52). The axis of the fixed ring (52) is collinear with the axis of the generator set (31). The first permanent magnet block (534) and the second permanent magnet block (543) are both four groups and are distributed at equal angles at 0°, 90°, 180° and 270° on the inner ring surface of the fixed ring (52) with the axis of the fixed ring (52) as the reference.

2. The wind turbine generator set shaft alignment monitoring and adjustment device according to claim 1, characterized in that: The opposite ends of the No. 1 permanent magnet block (534) and the No. 2 permanent magnet block (543) are in a distribution state of like-charge repulsion, and the pressures exerted by the four groups of the No. 1 permanent magnet blocks (534) on the entire active magnetic assembly (54) are Fright, Fup, Fleft, and Fdown, respectively.

3. The wind turbine generator shaft alignment monitoring and adjustment device according to claim 1, characterized in that: The adapter ring (535) is made of a rubber block and is arranged on the outer surface of the first permanent magnet block (534) in an interference fit. One end of the first permanent magnet block (534) facing the pressure sensor (533) is in press contact with the pressure sensor (533).

4. The wind turbine generator shaft alignment monitoring and adjustment device according to claim 1, characterized in that: The spring (334) is compressed and arranged between the first limiting ring (332) and the second limiting ring (333), and the telescopic rod (331) is a damping rod.

5. The wind turbine generator shaft alignment monitoring and adjustment device according to claim 1, characterized in that: The cross-section of the first permanent magnet block (534) is in a "T" shape, and a gap is left between the end of the protruding end of the first permanent magnet block (534) facing the fixed cylinder (531) and the adapter ring (535).

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