Round nut anti-loosening structure of wind power speed reducer

Abstract

The utility model discloses a round nut anti-loosening structure of a wind power speed reducer, relates to the technical field of wind power speed reducers, and can effectively prevent an output gear shaft from falling off. In the round nut anti-loosening structure of the wind power speed reducer, a planet carrier is connected with an output shaft through a spline; a large cone bearing and a small cone bearing are used for supporting the output shaft, and a non-standard round nut is used for locking; the anti-loose pin is installed on the planet carrier in an interference mode, and meanwhile the anti-loose pin is clamped in a pin hole of the non-standard round nut so that angular limiting of the non-standard round nut can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power reducers, in particular to a round nut anti-loosening structure of a wind power reducer. Background Art

[0002] Currently, wind turbine yaw and pitch reducers are a critical component of wind turbine generators. As wind turbines become more powerful, the load-bearing capacity requirements for wind turbine reducers continue to increase. When the wind turbine reducer is operating, the reducer output teeth mesh with the slewing support ring gear, and the reducer output shaft must withstand enormous radial and axial forces.

[0003] In the prior art, the industry typically uses two tapered roller bearings to support the output shaft, requiring the use of round nuts to pre-tighten the tapered roller bearings. However, since the actual force direction of the reducer can change at any time, the round nuts also need to be prevented from loosening. In this field, wind turbine reducers typically use round nut retaining washers to prevent loosening. This is achieved by machining a flat keyway on the output shaft and snapping the round nut retaining washer into the flat keyway to prevent loosening.

[0004] However, the inventors of this application found that this anti-loosening solution may cause the stop gasket to wear, the snap not to be in place, and the snap plate to break, which may lead to the risk of the round nut loosening and failure. In addition, a flat keyway needs to be processed on the output shaft, and stress concentration will occur at the intersection of the flat keyway and the output shaft, thereby affecting the fatigue strength of the shaft and increasing the risk of broken shaft. A broken shaft means that the entire reducer will be unusable, which poses huge risks in use and economy. Utility Model Content

[0005] The purpose of the utility model is to provide a round nut anti-loosening structure for a wind power reducer, which can effectively prevent the output gear shaft from falling off.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A round nut anti-loosening structure for a wind power reducer comprises: an output shaft, a planetary carrier and the output shaft connected via a spline; a large tapered bearing and a small tapered bearing are used to support the output shaft, and a non-standard round nut is used for locking;

[0008] The anti-loosening pin is interference-mounted on the planet carrier, and the anti-loosening pin is clamped in the pin hole of the non-standard round nut to achieve angular limitation of the non-standard round nut.

[0009] In actual application, the non-standard round nut has a U-shaped groove along the circumferential direction, and the U-shaped groove serves as the pin hole.

[0010] Among them, the maximum loosening angle of the non-standard round nut is the margin set when assembling the U-shaped groove, that is, 3°~9°.

[0011] Compared with the prior art, the round nut anti-loosening structure of the wind power reducer described in the utility model has the following advantages:

[0012] The utility model provides a round nut anti-loosening structure for a wind power reducer, wherein the planetary carrier and the output shaft are connected by a spline; a large tapered bearing and a small tapered bearing are used to support the output shaft, and a non-standard round nut is used for locking; the anti-loosening pin is installed on the planetary carrier with interference fit, and the anti-loosening pin is stuck in the pin hole of the non-standard round nut to achieve angular limitation of the non-standard round nut; therefore, the adoption of the new round nut anti-loosening structure can effectively and reliably increase the strength of the output shaft, thereby effectively improving the locking reliability of the output shaft and the round nut, thereby effectively reducing the risk of reducer failure, and greatly reducing the various costs caused by reducer failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of a round nut anti-loosening structure of a wind power reducer provided by an embodiment of the utility model;

[0014] Figure 2 for Figure 1 Schematic diagram of a local enlarged structure;

[0015] Figure 3 A schematic structural diagram of a non-standard round nut in a round nut anti-loosening structure of a wind power reducer provided by an embodiment of the utility model;

[0016] Figure 4 for Figure 3 Schematic diagram of a local enlarged structure;

[0017] Figure 5 This is a structural schematic diagram of the U-shaped groove of the non-standard round nut in the round nut anti-loosening structure of the wind power reducer provided by an embodiment of the utility model.

[0018] Reference numerals:

[0019] 1-Planet carrier; 2-Lock pin; 3-Non-standard round nut; 31-Pin hole; 4-Connecting sleeve; 5-Small tapered bearing; 6-Lower body; 7-Large vertebral bearing; 8-Output shaft. DETAILED DESCRIPTION

[0020] For ease of understanding, the round nut anti-loosening structure of the wind power reducer provided by the embodiment of the present utility model is described in detail below in conjunction with the drawings of the specification.

[0021] The present invention provides a round nut anti-loosening structure for a wind power reducer. Figure 1-Figure 5As shown, it includes: an output shaft 8, a planet carrier 1 and the output shaft 8 are connected by a spline; a large tapered bearing 7 and a small tapered bearing 5 are used to support the output shaft 8, and a non-standard round nut 3 is used to lock it;

[0022] The anti-loosening pin 2 is interference-mounted on the planet carrier 1 , and the anti-loosening pin 2 is stuck in the pin hole 31 of the non-standard round nut 3 to achieve angular limitation of the non-standard round nut 3 .

[0023] Compared with the prior art, the round nut anti-loosening structure of the wind power reducer described in the embodiment of the utility model has the following advantages:

[0024] In the round nut anti-loosening structure of the wind power reducer provided by the embodiment of the present invention, since the planetary carrier 1 and the output shaft 8 are connected by splines; the large tapered bearing 7 and the small tapered bearing 5 are used to support the output shaft 8, and the non-standard round nut 3 is used for locking; the anti-loosening pin 2 is installed on the planetary carrier 1 with interference fit, and the anti-loosening pin 2 is stuck in the pin hole 31 of the non-standard round nut 3 to achieve angular limitation of the non-standard round nut 3; therefore, the adoption of the new round nut (non-standard round nut 3) anti-loosening structure can effectively and reliably increase the output shaft strength, thereby effectively improving the locking reliability of the output shaft and the round nut, and then effectively reducing the risk of reducer failure, and greatly reducing the various costs caused by reducer failure.

[0025] The following describes in detail the working process of the round nut anti-loosening structure of the wind power reducer provided by the embodiment of the utility model with the help of the accompanying drawings:

[0026] A wind power reducer, such as Figure 1 As shown, when the reducer is working, the output shaft 8 transmits torque while bearing huge axial and radial forces;

[0027] When subjected to external load, the non-standard round nut 3 has a tendency to rotate, and the force is transmitted to the anti-loosening pin 2 in the pin hole 31 of the non-standard round nut 3; the anti-loosening pin 2 is interference fitted on the (low-speed stage) planetary carrier 1. Since the (low-speed stage) planetary carrier 1 and the output shaft 8 are connected by a spline, angular displacement cannot occur, and therefore the anti-loosening pin 2 will not occur angular displacement, thereby achieving a good limiting effect.

[0028] In actual application, such as Figure 1-Figure 5 As shown, the non-standard round nut 3 can have a U-shaped groove along the circumferential direction, and the U-shaped groove can be used as a pin hole 31, so that the non-standard round nut 3 is modified on the basis of the standard round nut, that is, a U-shaped groove is added, which makes production more convenient.

[0029] Among them, Figure 1-Figure 5As shown, the maximum loosening angle of the non-standard round nut 3 is the margin set during the U-groove assembly, which can be preferably 3°~9°, so that the planetary carrier 1 with the anti-loosening pin 2 can be angularly displaced by rotating the integer spline teeth at any position so that the anti-loosening pin 2 can cooperate with the pin hole 31.

[0030] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A round nut anti-loosening structure for a wind power reducer, characterized in that: include: The output shaft, the planet carrier and the output shaft are connected by splines; the output shaft is supported by large tapered bearings and small tapered bearings, and is locked with non-standard round nuts; The anti-loosening pin is interference-mounted on the planet carrier, and the anti-loosening pin is clamped in the pin hole of the non-standard round nut to achieve angular limitation of the non-standard round nut.

2. The round nut anti-loosening structure of the wind power reducer according to claim 1 is characterized in that: The non-standard round nut has a U-shaped groove along the circumferential direction, and the U-shaped groove serves as the pin hole.

3. The round nut anti-loosening structure of the wind power reducer according to claim 2, characterized in that: The maximum loosening angle of the non-standard round nut is the margin set when assembling the U-shaped groove, that is, 3°~9°.

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