A process for the friction surface of a yaw gear ring

Abstract

This invention belongs to the field of wind turbine bearing manufacturing, specifically relating to a process method for the friction surface of a yaw gear ring. The process method includes: semi-finish turning: using a semi-finish turning tool to semi-finish turn the friction surface of the yaw gear ring, removing most of the excess material; finish turning: using a finish turning tool to finish turn the friction surface of the yaw gear ring, forming evenly spaced oil reservoirs on the friction surface surface; and roller burnishing: using a dedicated roller burnishing tool to roller burnish the friction surface of the yaw gear ring, controlling the feed rate and workpiece speed via the machine tool to form a stable stress layer on the friction surface surface, while ensuring the surface roughness and profile length support ratio. This invention proposes a process method for the friction surface of a yaw gear ring. Using the above processing method ensures the stability of the yaw gear ring friction surface quality during mass production, guarantees the load-bearing capacity of the yaw gear ring, avoids abnormal vibration and noise during the operation of the yaw system, and improves the service life of the yaw gear ring.

Description

Technical Field

[0001] This invention belongs to the field of wind power bearing manufacturing, specifically relating to a process method for the friction surface of a yaw gear ring. Background Technology

[0002] With the vigorous development and application of wind energy resources both domestically and internationally, the number of wind turbine generators is constantly increasing. High-power yaw bearings, as core components of large wind turbines, determine the operational efficiency and reliability of large wind turbines throughout their entire lifespan through their design and manufacturing precision and quality. Sliding bearings, with their advantages of small radial dimensions, high load-bearing capacity, and low cost, represent an important technological development direction for the wind power industry towards higher power and lower cost in the future. As part of the sliding yaw system, the service life of the friction surface of the yaw gear ring determines the service life of the entire yaw system. Incorrect machining parameters of the friction surface can lead to abnormal vibrations and noises during the operation of the yaw system, severely impacting its service life. Summary of the Invention

[0003] To overcome the above-mentioned technical problems, the purpose of this invention is to propose a process method for the friction surface of a yaw gear ring.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A process for manufacturing the friction surface of a yaw gear ring includes the following steps:

[0006] (1) Semi-finish turning: The friction surface of the yaw gear ring is semi-finish turned using a semi-finish turning tool to remove most of the allowance. The friction surface must meet Ra < 1.25 at the end of the tool feed.

[0007] (2) Finish turning: The friction surface of the yaw gear ring is finished using a precision turning circular cutter at a speed of 10 r / min, a feed rate of 10 mm / min, and a cutting depth of 0.3 mm. The end of the tool feed is required to meet the requirement that the friction surface Ra1.25~2.5 and form uniformly spaced oil reservoirs on the friction surface.

[0008] (3) Roller burnishing: The friction surface of the yaw gear ring is rolled using a special roller burnishing cutter W1270. The feed rate and workpiece speed are controlled by the machine tool. The speed is 10 r / min, the feed rate is 3.3 mm / min, and the cutting depth is 0.15 mm. After the tool passes, a stable stress layer is formed on the friction surface. At the same time, the surface roughness Rz is 1.6~6.3 and the profile length support ratio Rmr (c50%) is ≥60%.

[0009] This invention proposes a process for the friction surface of a yaw gear ring. The above processing method can ensure the quality stability of the friction surface of the yaw gear ring during mass production, guarantee the load-bearing capacity of the yaw gear ring, avoid abnormal vibration and noise during the operation of the yaw system, and improve the service life of the yaw gear ring. Attached Figure Description

[0010] Figure 1 is a schematic diagram of the semi-finishing machining process of the present invention.

[0011] Figure 2 This is a schematic diagram of the precision turning process of the present invention.

[0012] Figure 3 This is a schematic diagram of the rolling process of the present invention.

[0013] In the diagram: 1. Friction surface, 2. Semi-finishing tool, 3. Finishing circular tool, 4. Oil reservoir, 5. Roller burnishing tool. Detailed Implementation

[0014] The present invention will be described in conjunction with the accompanying drawings and specific examples:

[0015] like Figures 1-3 As shown, a process for manufacturing the friction surface of a yaw gear ring includes the following steps:

[0016] (1) Semi-finish turning. The friction surface 1 of the yaw gear ring is semi-finish turned using a semi-finish turning tool 2 to remove most of the excess material. The friction surface 1 is required to satisfy Ra < 1.25 at the end of the tool feed.

[0017] (2) Finish turning. The friction surface 1 of the yaw gear ring is finished using a precision turning circular cutter 3 at a speed of 10 r / min, a feed rate of 10 mm / min, and a cutting depth of 0.3 mm. The friction surface 1 is required to meet Ra1.25~2.5 at the end of the tool feed, and uniformly spaced oil reservoirs are formed on the surface of the friction surface 1.

[0018] (3) Roller burnishing. A special roller burnishing cutter 5 W1270 is used to perform roller burnishing on the friction surface 1 of the yaw gear ring. The feed rate and workpiece speed are controlled by the machine tool. The speed is 10 r / min, the feed rate is 3.3 mm / min, and the cutting depth is 0.15 mm. After the tool passes, a stable stress layer is formed on the surface of the friction surface 1, while ensuring that the roughness Rz of the friction surface 1 is 1.6~6.3 and the profile length support ratio Rmr (c50%) is ≥60%.

[0019] This invention proposes a process for the friction surface of a yaw gear ring. The above processing method can ensure the quality stability of the friction surface of the yaw gear ring during mass production, guarantee the load-bearing capacity of the yaw gear ring, avoid abnormal vibration and noise during the operation of the yaw system, and improve the service life of the yaw gear ring.

Claims

1. A process for the friction surface of a yaw gear ring, comprising the following steps: (1) Semi-finishing machining: using a semi-finishing tool to perform semi-finishing machining on the friction surface of the yaw gear ring, removing most of the excess, and requiring the friction surface to satisfy Ra < 1.25 at the end of the machining; (2) Finishing machining: using a finishing circular tool to perform finishing machining on the friction surface of the yaw gear ring, with a rotational speed of 10 r / min, a feed rate of 10 mm / min, and a cutting depth of 0.3 mm; and requiring the friction surface to satisfy Ra 1.25-2.5 at the end of the machining, and to form evenly spaced oil storage grooves on the surface of the friction surface; (3) Rolling machining: using a special rolling tool W1270 to perform rolling machining on the friction surface of the yaw gear ring, controlling the feed rate and the rotational speed of the workpiece by the machine tool, with a rotational speed of 10 r / min, a feed rate of 3.3 mm / min, and a cutting depth of 0.15 mm; and forming a stable stress layer on the surface of the friction surface at the end of the machining, while ensuring that the roughness Rz of the friction surface is 1.6-6.3 and the profile length support rate Rmr (c50%) is ≥ 60%.

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