CN103335012A - Sun gear shaft of wind power gear box - Google Patents
Sun gear shaft of wind power gear box Download PDFInfo
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Abstract
本发明公开了一种风电齿轮箱的太阳齿轮轴,它由太阳轮(11)、支撑轴(12)和输出轴(13)三段构成一体的带内孔(14)的轴类齿轮,在支撑轴(12)上设有螺旋槽(15)。该螺旋槽(15)沿支撑轴(12)周向大于一周,螺旋槽(15)相当于在太阳轮(11)与输出轴(13)之间添加一刚度适度的弹簧,既能实现太阳轮(11)的轴向浮动,又能实现太阳轮(11)的径向浮动。本发明具有如下的优点:降低了行星齿轮传动机构对下一级结构的冲击与振动,提高了行星齿轮传动机构的性能,保证高速输出级平稳传动。
The invention discloses a sun gear shaft of a wind power gearbox, which is a shaft gear with an inner hole (14) composed of three sections: a sun gear (11), a support shaft (12) and an output shaft (13). The support shaft (12) is provided with a spiral groove (15). The spiral groove (15) is more than one circle along the circumference of the support shaft (12), and the spiral groove (15) is equivalent to adding a spring with moderate stiffness between the sun gear (11) and the output shaft (13), which can realize the The axial floating of (11) can realize the radial floating of the sun gear (11) again. The invention has the following advantages: the impact and vibration of the planetary gear transmission mechanism on the structure of the next stage are reduced, the performance of the planetary gear transmission mechanism is improved, and the stable transmission of the high-speed output stage is guaranteed.
Description
技术领域 technical field
本发明涉及一种风电齿轮箱内的行星齿轮传动机构,具体涉及一种风电齿轮箱的太阳齿轮轴。 The invention relates to a planetary gear transmission mechanism in a wind power gearbox, in particular to a sun gear shaft of a wind power gearbox.
背景技术 Background technique
风电齿轮箱中使用的是行星齿轮传动机构,其行星齿轮机构与风电齿轮箱外的桨叶相连,桨叶受风力作用带动第一级行星齿轮转动,第一级行星齿轮驱动位于中心的第一级太阳轮转动,第一级太阳轮连接太阳齿轮轴,第一级太阳轮轴将风动力传递给下一级行星齿轮,进一步传递给发电机,由发电机产生电能。 The wind power gearbox uses a planetary gear transmission mechanism. The planetary gear mechanism is connected to the blades outside the wind power gearbox. The blades are driven by the wind to rotate the first-stage planetary gears, and the first-stage planetary gears drive the first The first-stage sun gear rotates, the first-stage sun gear is connected to the sun gear shaft, and the first-stage sun gear shaft transmits wind power to the next-stage planetary gear, and then to the generator, which generates electrical energy.
图1为现有风电齿轮箱的行星齿轮传动机构图,它包括两级行星齿轮系和定轴齿轮系。第一级行星齿轮系有第一太阳齿轮轴1、第一行星架2、第一行星齿轮3和第一齿圈4,第一行星架2与桨叶主轴连接并由桨叶主轴驱动,带动第一太阳齿轮轴1转动;第二级行星齿轮系有第二太阳齿轮轴5、第二行星架6、第二行星齿轮7和第二齿圈8,第二行星架6与第一太阳齿轮轴1同轴联动,带动第二太阳齿轮轴5转动;定轴齿轮系有大齿轮10和高速齿轮9,大齿轮10与第二太阳齿轮轴5同轴联动,驱动高速齿轮9转动,高速齿轮轴9为输出轴,驱动发电机转子转动。
Fig. 1 is a diagram of a planetary gear transmission mechanism of an existing wind power gearbox, which includes a two-stage planetary gear train and a fixed-axis gear train. The first-stage planetary gear train has the first sun gear shaft 1, the first planetary carrier 2, the first planetary gear 3 and the first ring gear 4. The first planetary carrier 2 is connected to the main shaft of the blade and driven by the main shaft of the blade to drive The first sun gear shaft 1 rotates; the second-stage planetary gear train has a second
由于第一级行星传动传递风变载荷,其输入扭矩及转速时变性较强,波动较大,因此需尽可能采取相应措施以提高行星传动运行的平稳性,且美国齿轮制造协会公布的AGMA 6123-B06标准中已列举19种改善行星齿轮传动均载的措施,其中包含有允许一个或多个构件径向浮动,即通过齿圈或太阳轮或两者共同产生弹性变形的方案。 Since the first-stage planetary transmission transmits wind-varying loads, its input torque and speed have strong time-varying and large fluctuations, so it is necessary to take corresponding measures as much as possible to improve the stability of planetary transmission operation, and the AGMA 6123 published by the American Gear Manufacturers Association The -B06 standard has listed 19 measures to improve the load sharing of planetary gear transmissions, including a solution that allows one or more components to float radially, that is, the elastic deformation of the ring gear or the sun gear or both.
中国专利文献CN102518787A公开了一种风电齿轮箱的行星传动结构,它包括太阳轮、行星轮、行星轮轴承、心轴和行星轮支架,行星轮支架上安装心轴,行星轮通过行星轮轴承安装在心轴上,所述行星轮轴承为一对锥滚子轴承且背对背安装,两锥滚子轴承中间有隔层,一对锥滚子轴承外一侧紧靠心轴的台阶,另一侧紧靠设置在行星轮支架上的垫圈上。该专利解决了轴向风力对行星齿轮的冲击,但是当太阳轮与行星轮为斜齿啮合时,轴向风力会通过行星齿轮传递到太阳轮,对太阳轮和与太阳轮连接的下一级结构造成冲击,另外,该专利不能处理径向力给行星齿轮传动机构造成的振动问题。 Chinese patent document CN102518787A discloses a planetary transmission structure of a wind power gearbox, which includes a sun gear, a planetary gear, a planetary gear bearing, a mandrel and a planetary gear bracket, the mandrel is installed on the planetary gear bracket, and the planetary gear is installed through the planetary gear bearing On the mandrel, the planetary wheel bearings are a pair of tapered roller bearings installed back-to-back. There is an interlayer between the two tapered roller bearings. The outer side of a pair of tapered roller bearings is close to the steps of the mandrel, and the other side is close to Lean on the washer arranged on the planetary gear bracket. This patent solves the impact of axial wind force on the planetary gear, but when the sun gear and the planetary gear are in helical mesh, the axial wind force will be transmitted to the sun gear through the planetary gear, and will affect the sun gear and the next stage connected to the sun gear The structure causes impact, and in addition, this patent cannot deal with the vibration problem caused by radial force to the planetary gear transmission.
发明内容 Contents of the invention
本发明所要解决的技术问题就是提供一种能降低行星齿轮传动机构对下一级结构的冲击与振动的风电齿轮箱的太阳齿轮轴。 The technical problem to be solved by the present invention is to provide a sun gear shaft of a wind power gearbox that can reduce the impact and vibration of the planetary gear transmission mechanism on the next-level structure.
要解决上述技术问题,本发明由太阳轮、支撑轴和输出轴三段构成一体的带内孔的轴类齿轮,在支撑轴上设有螺旋槽。 To solve the above-mentioned technical problems, the present invention is a shaft gear with an inner hole which is composed of three sections of a sun gear, a support shaft and an output shaft, and a spiral groove is provided on the support shaft.
上述螺旋槽沿支撑轴周向大于一周,可使行星齿轮传动机构获得较好均载性能。大于一周的螺旋槽相当于在太阳轮与输出轴之间添加一刚度适度的弹簧,从而既能实现太阳轮的轴向浮动,又能实现太阳轮的径向浮动。 The above-mentioned spiral groove is more than one circle along the circumferential direction of the support shaft, so that the planetary gear transmission mechanism can obtain better load balancing performance. A helical groove longer than one turn is equivalent to adding a spring with moderate stiffness between the sun gear and the output shaft, so that both the axial float of the sun gear and the radial float of the sun gear can be realized.
本发明的原理是: Principle of the present invention is:
风电齿轮箱中,在行星轮支架为输入级条件下,由于太阳轮和行星齿轮均为一定螺旋角的斜齿轮,故太阳轮必定受到一定正向或反向轴向作用力的作用,这种时变轴向作用力对高速输出端存在一定的冲击作用,因此减小太阳轮轴向力作用,有利于提高行星齿轮传动机构的性能,保证高速输出级平稳传动。 In the wind power gearbox, under the condition that the planetary gear support is the input stage, since the sun gear and the planetary gear are both helical gears with a certain helix angle, the sun gear must be subjected to a certain positive or reverse axial force. The time-varying axial force has a certain impact on the high-speed output end, so reducing the axial force of the sun gear is conducive to improving the performance of the planetary gear transmission mechanism and ensuring the smooth transmission of the high-speed output stage.
当太阳轮受到轴向作用力时,由于在支撑轴中部有绕轴的螺旋槽,螺旋槽部位刚度相对较小,因此螺旋槽有一定的压缩或拉伸变形,从而使太阳轮的支撑轴在轴向获得一定的浮动。当行星齿轮传递载荷在设计范围内时,由于支撑轴的螺旋槽具有适中的刚度,螺旋槽仅存在微量变形,故太阳轮与行星齿轮能正常啮合。 When the sun gear is subjected to an axial force, since there is a spiral groove around the shaft in the middle of the support shaft, the rigidity of the spiral groove is relatively small, so the spiral groove has a certain compression or tensile deformation, so that the support shaft of the sun gear The axis gets a certain amount of float. When the transmission load of the planetary gear is within the design range, because the helical groove of the support shaft has moderate rigidity, there is only a slight deformation of the helical groove, so the sun gear and the planetary gear can mesh normally.
当太阳轮受到较大径向冲击载荷作用时,由于支撑轴上的螺旋槽径向的刚度比轴向的刚度小,螺旋槽有一定的弯曲弹性变形,使太阳轮获得一定的径向位移,从而降低径向冲击载荷对其余啮合齿轮对的影响,减小了径向冲击的作用,当径向冲击作用消失时,具有弹性变形的螺旋槽又恢复至初始位置,从而保持各齿对的正常啮合。 When the sun gear is subjected to a large radial impact load, since the radial stiffness of the spiral groove on the support shaft is smaller than the axial stiffness, the spiral groove has a certain bending elastic deformation, so that the sun gear obtains a certain radial displacement. In this way, the influence of radial impact load on the remaining meshing gear pairs is reduced, and the effect of radial impact is reduced. When the radial impact effect disappears, the spiral groove with elastic deformation returns to the original position, thereby maintaining the normal operation of each tooth pair. engage.
由于采用了上述技术方案,本发明具有如下的优点:降低了行星齿轮传动机构对下一级结构的冲击与振动,提高了行星齿轮传动机构的性能,保证高速输出级平稳传动。 Due to the adoption of the above technical solution, the present invention has the following advantages: the impact and vibration of the planetary gear transmission mechanism on the next-stage structure is reduced, the performance of the planetary gear transmission mechanism is improved, and the high-speed output stage is guaranteed to drive smoothly.
附图说明 Description of drawings
本发明的附图说明如下: The accompanying drawings of the present invention are as follows:
图1为现有风电齿轮箱的行星齿轮传动机构示意图; Fig. 1 is a schematic diagram of a planetary gear transmission mechanism of an existing wind power gearbox;
图2为本发明的结构示意图; Fig. 2 is a structural representation of the present invention;
图3为图1中A处的立体结构示意图; Fig. 3 is the schematic diagram of the three-dimensional structure of place A in Fig. 1;
图4为使用本发明的行星齿轮传动机构示意图。 Fig. 4 is a schematic diagram of a planetary gear transmission mechanism using the present invention.
图中:1.第一太阳齿轮轴;2. 第一行星架;3. 第一行星齿轮;4. 第一齿圈;5. 第二太阳齿轮轴;6. 第二行星架;7. 第二行星齿轮;8. 第二齿圈; 9. 高速齿轮;10. 大齿轮; In the figure: 1. The first sun gear shaft; 2. The first planet carrier; 3. The first planetary gear; 4. The first ring gear; 5. The second sun gear shaft; 6. The second planet carrier; 7. The second Two planetary gears; 8. Second ring gear; 9. High speed gear; 10. Big gear;
11.太阳轮;12.支撑轴;13.输出轴;14.内孔;15.螺旋槽;1′.本发明的太阳齿轮轴。 11. Sun gear; 12. Support shaft; 13. Output shaft; 14. Inner hole; 15. Spiral groove; 1′. The sun gear shaft of the present invention.
具体实施方式 Detailed ways
下面结合附图和实施例对本发明作进一步说明: Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
如图2和图3所示,本发明由太阳轮11、支撑轴12和输出轴13三段构成一体的带内孔14的轴类齿轮,在支撑轴12上设有螺旋槽15。
As shown in Fig. 2 and Fig. 3, the present invention is a shaft gear with
如图2所示,上述螺旋槽15沿支撑轴12周向大于一周。
As shown in FIG. 2 , the above-mentioned
如图3所示,螺旋槽15有槽宽和螺距,当太阳轮11承受较大冲击载荷时,槽宽较大、螺距较小。根据实际情况,螺旋槽15可设为两条或两条以上。
As shown in FIG. 3 , the
螺旋槽15为支撑轴12表面的沟槽,此时螺旋槽未穿通内孔14,适用于太阳齿轮轴传递较大扭矩,且太阳轮无轴向浮动的情况。螺旋槽15穿通内孔14,适用于太阳轮既有轴向浮动又有径向浮动的情况。
The
与现有风电齿轮箱的行星齿轮传动机构相比,本发明还具有以下优点: Compared with the planetary gear transmission mechanism of the existing wind power gearbox, the present invention also has the following advantages:
1、在相同弹性形变条件下,减小了太阳齿轮轴的长度,能降低风电齿轮箱轴向尺寸; 1. Under the same elastic deformation condition, the length of the sun gear shaft is reduced, which can reduce the axial dimension of the wind power gearbox;
2、由于轴中心有内孔14,在改变支撑轴12内径或外径情况下,可改变太阳齿轮轴“弹簧”刚度;
2. Since there is an
3、改变螺旋槽15的螺距的槽宽,可使太阳轮11获得较大的径向位移及轴向位移;
3. Changing the groove width of the pitch of the
4、结构相对简单,易于加工制造,且可降低生产成本。 4. The structure is relatively simple, easy to process and manufacture, and can reduce production costs.
如图4所示,本发明的太阳齿轮轴1′作为第一级太阳齿轮轴,增加了第一级行星传动系的柔性,有利于轮齿载荷在齿宽方向上的均匀分布,减小了风变冲击载荷对风电齿轮箱的行星齿轮传动机构的影响,增强行星齿轮传动机构承载性能,提高了行星齿轮传动机构运行的平稳性及可靠性。 As shown in Figure 4, the sun gear shaft 1' of the present invention is used as the first-stage sun gear shaft, which increases the flexibility of the first-stage planetary transmission system, facilitates the uniform distribution of the gear tooth load in the tooth width direction, and reduces the The influence of wind-variable impact load on the planetary gear transmission mechanism of the wind power gearbox enhances the load-bearing performance of the planetary gear transmission mechanism and improves the stability and reliability of the planetary gear transmission mechanism.
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CN111059262A (en) * | 2019-12-23 | 2020-04-24 | 湘潭大学 | Planetary gear transmission variable-rigidity flexible pin shaft load balancing structure |
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Inventor after: Zhu Caichao Inventor after: Di Hongfei Inventor after: Gu Zonglin Inventor before: Zhu Caichao Inventor before: Di Hongfei Inventor before: Gu Zonglin |
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Application publication date: 20131002 |