Self-locking in-turn pocket retainer for wind power variable pitch bearing

Abstract

The utility model belongs to the technical field of parts of wind power equipment, and particularly discloses a self-locking in-turn pocket retainer for a wind power variable pitch bearing, the retainer is of a circular ring structure, and a plurality of pockets are uniformly distributed on the outer end face of the retainer; the side wall of the pocket is symmetrical relative to the center line of the pocket, and the side wall of the pocket is composed of a first arc section, a first linear section, a second arc section, a second linear section and an assembly slope section from top to bottom; the upper ends of the first arc sections are located at the upper ends of the pockets, and the lower ends of the first arc sections are located in the middles of the side walls of the pockets and connected with the upper ends of the first linear sections. The second straight line section is positioned below the first straight line section and is connected with the first straight line section through the second arc section; the lower end of the second linear section is connected with the upper end of the assembly slope section; according to the retainer, the running performance and stability of the bearing can be improved, vibration and swing of the retainer in the running process can be effectively reduced, noise and vibration are reduced, and the bearing runs more stably and reliably.

Description

Technical Field

[0001] This utility model belongs to the technical field of wind power equipment components, specifically relating to a self-locking alternating pocket retainer for wind turbine pitch bearings. Background Technology

[0002] In wind power generation systems, pitch bearings are critical components, and their performance directly affects the stable operation and power generation efficiency of the wind turbine. During operation, pitch bearings require frequent adjustments to the blade angle to adapt to varying wind speeds and directions. This necessitates that the pitch bearing cage possess higher reliability and stability to ensure the rolling elements function properly under complex operating conditions.

[0003] In bearing manufacturing and practical applications, the cage is a key component, its function being to isolate the rolling elements, guide their movement, and distribute load evenly. Traditional alternating pocket cages, due to the alternating pockets and numerous rolling elements, require two repetitions in both directions during assembly, resulting in significant assembly difficulty and low efficiency. Furthermore, during bearing operation, when subjected to impact loads, vibration, or temperature changes, the traditional self-locking design can easily cause the rolling elements to jam in the cage pockets, affecting normal bearing operation and reducing bearing life and reliability. Therefore, developing a self-locking alternating pocket cage that improves bearing assembly efficiency and effectively prevents rolling element jamming is of significant practical importance. Utility Model Content

[0004] To address the problems existing in the background art, this utility model provides a self-locking alternating pocket retainer for wind turbine pitch bearings.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a self-locking alternating pocket retainer for wind turbine pitch bearings, wherein the retainer is a ring structure with multiple pockets evenly distributed on the outer end face of the retainer; the sidewalls of the pockets are symmetrical with respect to the center line of the pockets, and the sidewalls of the pockets are composed of a first arc segment, a first straight segment, a second arc segment, a second straight segment, and an assembly ramp segment from top to bottom; the upper end of the first arc segment is located at the upper end of the pocket, and the lower end of the first arc segment is located in the middle of the sidewall of the pocket and connected to the upper end of the first straight segment; the second straight segment is located below the first straight segment and is connected to the first straight segment through the second arc segment; the lower end of the second straight segment is connected to the upper end of the assembly ramp segment.

[0006] The lower end of the first arc segment is tangent to the upper end of the first straight line segment.

[0007] The first and second straight line segments are parallel to the center line of the pocket, and the distance between the first straight line segment and the center line of the pocket is greater than the distance between the second straight line segment and the center line of the pocket.

[0008] The second circular arc segment is composed of two tangent circular arcs, the upper end of the second circular arc segment is tangent to the first straight line segment, and the lower end of the second circular arc segment is tangent to the second straight line segment.

[0009] The assembly slope segment is trumpet-shaped, and the inner diameter of the assembly slope segment gradually decreases from bottom to top.

[0010] The wind power variable pitch bearing with the self-locking turn-by-turn pocket hole retainer can improve the running performance and stability of the bearing, effectively reduces vibration and swing of the retainer during operation, improves the overall stability of the bearing, reduces noise and vibration, and makes the bearing run more smoothly and reliably. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is a front view of the utility model.

[0012] Fig. 2 It is an A-A sectional view.

[0013] Fig. 3 It is an enlarged view of the pocket hole side wall.

[0014] In the figure: 1, retainer, 2, pocket hole, 3, oil storage groove, 21, first circular arc segment, 22, first straight line segment, 23, second circular arc segment, 24, second straight line segment, 25, assembly slope segment DETAILED DESCRIPTION

[0015] The technical solutions of the utility model will be described clearly and completely in combination with the drawings of the specification, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0016] The following will be combined with the drawings of the specification Figs. 1-3Further detailed description of the specific embodiments of the present application is as follows: a wind power variable pitch bearing with a self-locking turnabout hole retainer, the retainer 1 is a circular ring structure, an oil storage groove 3 is arranged on the upper end face of the retainer 1, and the oil storage groove 3 is a lubricating channel of the retainer 1; a plurality of hole 2 are uniformly distributed on the outer end face of the retainer 1; the side wall of the hole 2 is symmetrical relative to the center line of the hole 2, and the side wall of the hole 2 is composed of a first circular arc segment 21, a first straight line segment 22, a second circular arc segment 23, a second straight line segment 24 and an assembly slope segment 25 from top to bottom; the upper end of the first circular arc segment 21 is located at the upper end of the hole 2, and the lower end of the first circular arc segment 21 is located at the middle part of the side wall of the hole 2 and is tangent to the upper end of the first straight line segment 22; the tangency of the first circular arc segment 21 and the first straight line segment 22 can make the transition more smooth, and facilitate the lubrication of the rolling body; the second straight line segment 24 is located below the first straight line segment 22 and is connected with the first straight line segment 22 through the second circular arc segment 23; the first straight line segment 22 and the second straight line segment 24 are parallel to the center line of the hole 2, and the distance between the first straight line segment 22 and the center line of the hole 2 is greater than the distance between the second straight line segment 24 and the center line of the hole 2; the second circular arc segment 23 is composed of two tangent circular arcs, the upper end of the second circular arc segment 23 is tangent to the first straight line segment 22, and the lower end of the second circular arc segment 23 is tangent to the second straight line segment 24; in the actual use process, the design of the first circular arc segment 21 can effectively wrap and guide the rolling body; the first straight line segment 22 accounts for about 15% to 20% of the thickness proportion of the retainer, and the shorter straight line segment hole design can effectively prevent the rolling body from being stuck in the retainer; the second circular arc segment 23 is a transition area of the first straight line segment 22 and the second straight line segment 24, and the purpose is to make the transition more smooth, and facilitate the lubrication of the rolling body; the first straight line segment 22 and the second straight line segment 24 form a self-locking structure, the self-locking structure can keep the rolling body as a whole when the bearing ring is installed or disassembled, and the installation and maintenance are convenient; the lower end of the second straight line segment 24 is connected with the upper end of the assembly slope segment 25; the assembly slope segment 25 is trumpet-shaped, and the inner diameter of the assembly slope segment 25 gradually decreases from bottom to top; the assembly slope segment 25 is an expanded port guide part, and the guide and self-locking structure can optimize the assembly process and improve the assembly efficiency.

[0017] The above description is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0018] The part not described in the present application is prior art.

Claims

1. A wind turbine variable pitch bearing with a self-locking round-robin cage, the cage (1) is a circular ring structure, and a plurality of pockets (2) are uniformly distributed on the outer end surface of the cage (1); characterized in that: The side wall of the pocket (2) is symmetrical relative to the center line of the pocket (2), and the side wall of the pocket (2) is composed of a first circular segment (21), a first straight segment (22), a second circular segment (23), a second straight segment (24) and an assembly slope segment (25) from top to bottom; the upper end of the first circular segment (21) is located at the upper end of the pocket (2), and the lower end of the first circular segment (21) is located at the middle of the side wall of the pocket (2) and is connected with the upper end of the first straight segment (22); the second straight segment (24) is located below the first straight segment (22) and is connected with the first straight segment (22) through the second circular segment (23); the lower end of the second straight segment (24) is connected with the upper end of the assembly slope segment (25).

2. The wind turbine variable pitch bearing cage with self-locking raceway pockets of claim 1, wherein: The lower end of the first circular segment (21) is tangent to the upper end of the first straight segment (22).

3. The self-locking alternating pocket retainer for wind turbine pitch bearings according to claim 1, characterized in that: The first straight segment (22) and the second straight segment (24) are parallel to the center line of the pocket (2), and the distance between the first straight segment (22) and the center line of the pocket (2) is greater than the distance between the second straight segment (24) and the center line of the pocket (2).

4. The wind turbine variable pitch bearing raceway cage with self-locking roller pockets of claim 1 wherein: The second circular segment (23) is composed of two tangent circular segments, the upper end of the second circular segment (23) is tangent to the first straight segment (22), and the lower end of the second circular segment (23) is tangent to the second straight segment (24).

5. The wind turbine variable pitch bearing raceway cage with self locking roller pockets of claim 1 wherein: The assembly slope segment (25) is trumpet-shaped, and the inner diameter of the assembly slope segment (25) gradually decreases from bottom to top.

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