New process nut and method for yaw system of wind generating set

Abstract

The invention discloses a novel process nut and method for a yaw system of a wind generating set, and relates to the technical field of wind power generation. The nut assembly comprises an adjusting nut, a base locking nut, a locking nut of the adjusting nut and an inner hexagonal mounting hole. The adjusting nut is made of high-strength alloy steel, and the locking nut is in a nylon insert anti-loosening design. During installation and debugging, the base is installed on a wind turbine generator base, the copper sleeve, the spring gasket, the belleville spring and the pin shaft are sequentially placed, then the adjusting nut assembly is installed through the base locking nut, the adjusting nut is made to be aligned with the pin shaft, then the friction plate is installed, the adjusting nut is adjusted according to the number specification of the copper cups, and finally the locking nut of the adjusting nut is tightened. Nut loosening can be effectively prevented, the reliability and stability of a yaw system are improved, and later maintenance and adjustment are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of a yaw system of a wind generator set, and in particular to a new process nut assembly for a yaw system of a wind generator set and an installation and debugging method thereof. Background Art

[0002] With the continuous development of wind power generation technology, the scale and power of wind turbines are increasing. As one of the key components of a wind turbine, the main function of the yaw system is to enable the wind rotor to always align with the wind direction to obtain the maximum utilization of wind energy. In the yaw system, the nut assembly plays an extremely important role in connection and adjustment. During the long-term operation of the traditional nut assembly, due to the harsh operating environment of the wind turbine, it is affected by factors such as vibration, impact and temperature changes. This will not only lead to a decrease in the braking performance of the yaw system and affect the normal operation of the wind turbine, but may also cause safety accidents. Moreover, during the installation and debugging process of the traditional nut assembly, it is often difficult to accurately control the adjustment accuracy, resulting in unstable overall performance of the yaw system, increasing the cost and difficulty of operation and maintenance. Therefore, the development of a new type of nut assembly and its installation and debugging method to improve the reliability and stability of the yaw system has become an urgent problem to be solved in the field of wind power generation. Summary of the invention

[0003] The purpose of the present invention is to provide a new process nut for a yaw system of a wind turbine generator set to solve the problems raised by the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a new process nut for a yaw system of a wind turbine generator set, characterized in that it comprises: The adjusting nut is used to adjust the brake damping torque. It cooperates with the M14*1.5 bolt and adjusts its position in the nut by rotating the bolt. The adjusting nut is made of high-strength alloy steel and has a groove inside that matches the pin shaft. The base locking nut is used to install the adjusting nut assembly on the base of the wind turbine. It is a round nut with an outer diameter matching the base mounting hole and a thread specification of M39. It is provided with a hexagonal mounting hole located in the middle; The locking nut of the adjusting nut is used to lock the adjusting nut, and its thread matches the external thread of the adjusting nut and adopts an anti-loosening design; The hexagon socket mounting hole is set in the middle of the base locking nut and is used to tighten the base locking nut with a hexagon socket wrench. The size accuracy of the hexagon socket mounting hole ensures that the hexagon socket wrench is accurately inserted and the force is evenly applied when the nut is tightened.

[0005] Preferably, when the adjusting nut is installed on the base through the base locking nut, the adjusting nut is aligned with the pin position to ensure accurate force transmission.

[0006] A method for installing and debugging a new process nut assembly of a yaw system of a wind turbine generator set, characterized in that it comprises the following steps: S1: Install the base on the wind turbine base, carefully check its installation position, ensure that the relative position with other components is consistent with the design, and make timely adjustments if there is any deviation.

[0007] S2: Place the copper sleeve steadily on the corresponding position of the base, ensuring that it is correct and not skewed. Then place the spring gasket flatly in the copper sleeve to lay a solid foundation for subsequent installation.

[0008] S3: Place the disc spring correctly in the copper sleeve, then carefully insert the pin vertically into the center hole of the disc spring so that one end of the pin is in close contact with the disc spring to avoid damaging the spring.

[0009] S4. Install the adjusting nut assembly including the adjusting nut and the locking nut of the adjusting nut on the base through the base locking nut, and tighten the base locking nut with a hexagonal wrench to align the adjusting nut with the pin; S5. Glue the friction plate to the copper cup with a specific glue to ensure good contact between the friction plate, the copper cup and the brake disc; S6. According to the number and specifications of the copper cups of the wind turbine, make preliminary adjustments to the adjusting nut. First, tighten the M14*1.5 bolt to 1Nm torque, then rotate the bolt according to the corresponding rotation angle, and use a depth gauge to measure the displacement of the adjusting nut during rotation; S7. Tighten all 6 M14*1.5 bolts with your fingers, and tighten each bolt 1 full turn with a 12mm wrench in a star pattern and repeat 2 turns; S8. Loosen all bolts and tighten manually, and mark the starting point of the bolts with a paint pen; S9. Tighten the bolts in a star pattern to the required displacement according to the OEM displacement recommendations. One full turn is approximately 1.5 mm. The spring group compression can be measured to ensure that it is consistent with the depth gauge. S10. Tighten the lock nut 3 of the adjusting nut with a 22mm socket; S11. During later maintenance, readjust the displacement of the 6 M14*1.5 bolts according to the wear of the friction plate according to the above steps.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The adjusting nut of the present invention is made of high-strength alloy steel, has good strength and toughness, and can withstand the large stress during the braking process of the yaw system. The locking nut of the adjusting nut adopts a nylon insert anti-loosening design, which effectively increases the friction between the threads, prevents the adjusting nut from loosening under vibration and impact during the operation of the fan, and greatly improves the reliability of the connection.

[0011] 2. The outer cylindrical surface of the adjusting nut is processed with fine threads, which can match the M14*1.5 bolt with extremely high precision. The groove at the center of one end of the adjusting nut is tightly matched with the end of the pin shaft, which can accurately transmit force. During the installation and debugging process, by using tools such as feeler gauges and depth gauges, the gaps between the components and the displacement of the adjusting nut are strictly controlled to ensure the adjustment accuracy, thereby improving the overall performance stability of the yaw system.

[0012] 3. The inner wall of the hexagonal mounting hole on the base locking nut is smooth, which is convenient for the insertion and operation of the hexagonal wrench and can ensure the uniform transmission of force during the tightening process. The installation and debugging steps of the entire nut assembly are clear and easy to operate, which is conducive to improving installation efficiency and reducing the difficulty and cost of operation and maintenance.

[0013] 4. After the wind turbine has been running for a period of time, the nut assembly of the present invention can be easily readjusted according to the wear of the friction plate to ensure that the yaw brake damping torque meets the requirements, so that the yaw operation of the wind turbine always remains stable, effectively extending the service life of the yaw system and improving the overall reliability and power generation efficiency of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an isometric structural schematic diagram of a new process nut for a yaw system of a wind turbine generator set according to the present invention; Figure 2 This is a front view of a new process nut for a yaw system of a wind turbine generator set according to the present invention; Figure 3 A cross-sectional view of a new process nut for a yaw system of a wind turbine generator set according to the present invention; Figure 4 A top view of a new process nut for a yaw system of a wind turbine generator set according to the present invention; Figure 5 It is a schematic cross-sectional structure diagram of a copper sleeve of a yaw system of a wind turbine generator set according to the present invention; Figure 6 It is a three-dimensional schematic diagram of a copper sleeve of a yaw system of a wind turbine generator set according to the present invention; In the figure: 1-adjusting nut, 2-base locking nut, 3-locking nut of adjusting nut, 4-hexagonal mounting hole, 5-pin shaft, 6-disc spring, 7-copper cup, 8-gasket, 9-threaded hole, 10-base, 11-friction plate. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1 As an optimal embodiment of the present invention, the present invention comprises an adjusting nut (1), a base locking nut (2), a locking nut of the adjusting nut (3), and a hexagonal mounting hole (4).

[0017] As an optimal embodiment of the present invention, the adjusting nut (1) is cylindrical in shape as a whole, and its outer cylindrical surface is processed with fine threads, which have extremely high matching accuracy with the M14*1.5 bolt, ensuring the smoothness and accuracy of the bolt when rotating in the nut. The material of the adjusting nut (1) is high-strength alloy steel, which has good strength and toughness and can withstand the large stress during the braking process of the yaw system. A groove is opened at the center of one end face of the adjusting nut (1), and the shape of the groove is a regular hexagon. The distance between the opposite sides is matched with the end size of the pin shaft (5), ensuring a close fit between the two, thereby effectively transmitting force.

[0018] As an optimal embodiment of the present invention, the base locking nut (2) is a round thick nut with an outer diameter precisely designed to be M39, which is tightly matched with the mounting threaded hole on the base (10). It is sufficient to provide sufficient friction and tightening force to firmly mount the adjustment nut assembly on the base (10). A hexagonal mounting hole (4) is machined in the middle of the base locking nut (2). The inner wall of the hexagonal mounting hole (4) is smooth, which is convenient for inserting and operating the hexagonal wrench and can ensure uniform transmission of force during the tightening process.

[0019] As an optimal embodiment of the present invention, the locking nut (3) of the adjusting nut is a small nut, and its thread specifications are completely consistent with the external thread of the adjusting nut (1). A nylon insert anti-loosening design is adopted, and the inserts are evenly distributed in the nut, which effectively increases the friction between the threads and prevents the adjusting nut (1) from loosening due to vibration and impact during the operation of the fan.

[0020] The hexagon socket mounting hole (4) is located at the exact center of the base locking nut (2), and its axis coincides with the axis of the base locking nut (2), ensuring uniform force distribution during tightening and preventing the nut from loosening or being damaged due to eccentricity. The hexagon socket mounting hole (4) is processed using precision drilling and reaming technology to ensure the accuracy of its shape and size, as well as a good fit with the hexagon socket wrench.

[0021] As an optimal embodiment of the present invention, during the installation, the adjusting nut (1) is mounted at a corresponding position on the base (10) by means of its thread engaging with the M14*1.5 bolt, and its groove is tightly engaged with the end of the pin (5). The base locking nut (2) is engaged with the hexagonal wrench through the hexagonal mounting hole (4) and is screwed onto the base (10), thereby pressing and fixing the adjusting nut (1) so that it cannot be displaced in the axial and radial directions. After the adjusting nut (1) is adjusted to a suitable position, the locking nut (3) of the adjusting nut is screwed onto the adjusting nut (1), thereby further enhancing the reliability of the connection and preventing the adjusting nut (1) from loosening.

[0022] As an optimal implementation mode of the present invention, the installation and debugging method of a new process nut assembly of a yaw system of a wind turbine generator set comprises the following steps: S1: Install the base (10) on the base of the wind turbine generator set, and carefully check the installation position of the base (10) to ensure that its relative position with other components of the wind turbine generator set meets the design requirements. If there is any deviation, make adjustments in a timely manner.

[0023] S2: Place the copper sleeve steadily on the corresponding position of the base (10), ensuring that the copper sleeve is installed correctly and without skew. Then, put the spring washer into the copper sleeve, ensuring that the spring washer is placed flat and without wrinkles, providing a stable foundation for the subsequent installation of components.

[0024] S3: Place the disc spring (6) in the copper sleeve, and ensure that the disc spring (6) is placed correctly and without skew. Next, carefully insert the pin (5) into the center hole of the disc spring (6), so that one end of the pin is in close contact with the disc spring (6). When inserting, be sure to keep the pin vertical to prevent damage to the disc spring (6).

[0025] S4: Pre-assemble the adjusting nut (1) and the locking nut (3) of the adjusting nut so that the locking nut (3) can be smoothly locked after the adjusting nut (1) is adjusted. Place the assembled adjusting nut assembly on the base (10) so that the groove of the adjusting nut (1) is aligned with the end of the pin (5) with a deviation of no more than ±0.5mm. Select an appropriate hexagonal wrench and insert it into the hexagonal mounting hole (4) of the base locking nut (2) to start tightening the base locking nut (2). During the tightening process, use a feeler gauge to check the gap between the adjusting nut (1) and the pin (5) to ensure that the two are closely aligned and the gap does not exceed 0.1mm. Use a torque wrench to tighten the base locking nut (2) according to the specified torque (determined by referring to relevant standards or equipment requirements) to ensure that the adjusting nut assembly is firmly installed on the base (10).

[0026] S5: Attach the friction plate (11) to the copper cup with a specific adhesive, so that its upper end surface is completely in contact with the lower end surface of the copper cup (7), and the contact area is in good condition (e.g., more than 95%). Adjust the position of the friction plate (11) to ensure that it is concentric with the yaw brake disc, with a deviation of no more than ±0.5mm, and that it is in uniform contact with the copper cup (7) in the circumferential direction, without local warping or excessive gap.

[0027] S6: According to the number of copper cups of the wind turbine (such as 12 copper cups, 14 copper cups or 18 copper cups, etc.), use a torque wrench to tighten the M14*1.5 bolts to 1Nm torque, ensuring that the torque of each bolt is consistent. Then rotate the bolts according to the corresponding rotation angle (such as 420° for 12 copper cups, 330° for 14 copper cups, and 240° for 18 copper cups). During the rotation, use a depth gauge to measure the displacement of the adjustment nut (1) to ensure that the adjustment nut (1) is accurately adjusted.

[0028] S7: Tighten all 6 M14*1.5 bolts with your fingers to ensure that each bolt is initially fixed. Then use a 12mm wrench to tighten each bolt 1 full turn in a star pattern. The tightening sequence is as specified (e.g. tighten No. 1 bolt first, then No. 3, No. 5, No. 2, No. 4, No. 6 bolts in sequence), and repeat this operation for 2 turns. During the tightening process, pay attention to whether the grease between the spring washers is squeezed out to ensure that the system is initially in place. The tightening torque of each bolt should be increased evenly.

[0029] S8: Loosen all bolts in the opposite order of tightening. Then tighten each bolt manually one by one to start the final installation. The tightening torque should be controlled within a suitable range (such as 5-10N・m) so that there is a certain pre-tightening force between the bolt and the nut, but not too tight to affect subsequent adjustments. At the same time, use a paint pen to mark the starting point on the bolt head and nut for reference in subsequent adjustments.

[0030] S9: Tighten each bolt in a star pattern using a 12mm wrench until the desired displacement is achieved (1 full turn is approximately 1.5mm) according to the displacement recommendations of the OEM. During the adjustment process, the spring group compression can be measured using a suitable tool (such as a spring compression gauge) to ensure that it is consistent with the displacement of the adjustment nut (1) measured by the depth gauge. Each bolt should be adjusted gradually to avoid excessive adjustment at one time that may cause system instability. The bolt torque after adjustment should be within the specified range (determined by referring to relevant standards or equipment requirements).

[0031] S10: Use a 22mm socket wrench to tighten the lock nut (3) of the adjusting nut to an appropriate tightening torque (e.g. 30-40N·m) to ensure that the adjusting nut (1) will not loosen due to vibration during fan operation. During the tightening process, be careful to prevent the lock nut (3) from interfering with other parts, and check whether the adjusting nut (1) can still rotate normally.

[0032] S11: After the fan has been running for a period of time, according to the actual wear of the friction plate (11) (measured through the measuring hole, adjustment is required when the wear exceeds a certain value such as 0.5mm), readjust the displacement of the 6 M14*1.5 bolts according to the above steps S6-S10. Before adjustment, first check the tightness of the adjustment nut (1), the base locking nut (2) and the locking nut of the adjustment nut (3). If there is any looseness, tighten it according to the specified torque. During the adjustment process, closely observe the braking effect of the yaw system to ensure that the adjusted yaw brake damping torque meets the requirements and the fan yaw runs smoothly.

[0033] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A new process nut for the yaw system of a wind turbine generator set, characterized in that: include: The adjusting nut is used to adjust the brake damping torque. It is matched with the M14*1.5 bolt. The position in the nut is adjusted by rotating the bolt. The material is high-strength alloy steel, and there is a groove inside that matches the pin shaft. The base locking nut is used to install the adjusting nut assembly on the base of the wind turbine. It is a round nut with an outer diameter matching the base mounting hole. The thread specification is M39 and there is a hexagonal mounting hole in the middle. The locking nut of the adjusting nut is used to lock the adjusting nut, and its thread matches the external thread of the adjusting nut and adopts an anti-loosening design; The hexagon socket mounting hole is set in the middle of the base locking nut and is used to tighten the base locking nut with a hexagon socket wrench. Its dimensional accuracy ensures that the hexagon socket wrench is accurately inserted and the force is evenly applied when the nut is tightened.

2. A new process nut for a yaw system of a wind turbine generator set according to claim 1, characterized in that: When the adjusting nut is installed on the base through the base locking nut, the adjusting nut is aligned with the pin shaft to ensure accurate force transmission.

3. A method for installing and debugging a new process nut assembly for a yaw system of a wind turbine generator set, characterized in that: The following steps are involved: S1: Install the base on the wind turbine base, check its installation position, ensure that the relative position with other components is consistent with the design, and make timely adjustments if there is any deviation; S2: Place the copper sleeve steadily on the corresponding position of the base, making sure it is correct and not skewed, and then place the spring gasket flatly in the copper sleeve; S3: Place the disc spring correctly in the copper sleeve, then carefully insert the pin vertically into the center hole of the disc spring so that one end of the pin is in close contact with the disc spring; S4: Install the adjusting nut assembly including the adjusting nut and the locking nut of the adjusting nut on the base through the base locking nut, and tighten the base locking nut with a hexagonal wrench to align the adjusting nut with the pin shaft; S5: Glue the friction plate to the copper cup with a specific glue to ensure good contact with the copper cup and the brake disc; S6: According to the number and specifications of the copper cups of the wind turbine, make preliminary adjustments to the adjusting nut. First, tighten the M14*1.5 bolt to 1Nm torque, then rotate the bolt according to the corresponding rotation angle, and use a depth gauge to measure the displacement of the adjusting nut during rotation; S7: Tighten all 6 M14*1.5 bolts with your fingers, and tighten each bolt 1 full turn with a 12mm wrench in a star pattern and repeat 2 turns; S8: Loosen all bolts and tighten manually, and mark the starting point of the bolts with a paint pen; S9: Tighten the bolts in a star pattern to the required displacement according to the OEM displacement recommendations. One full turn is approximately 1.5 mm. The spring group compression can be measured to ensure that it is consistent with the depth gauge. S10: Tighten the lock nut 3 of the adjusting nut with a 22mm socket; S11: During later maintenance, readjust the displacement of the 6 M14*1.5 bolts according to the wear of the friction plate according to the above steps.

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