阅读说明：本技术 一种风力发电机组液压变桨系统轴承组件 (Bearing assembly of hydraulic pitch control system of wind generating set ) 是由 范文龙 崔新维 胡成明 于 2019-12-13 设计创作，主要内容包括：本发明公开了一种风力发电机组液压变桨系统轴承组件,包括液压执行器、变桨轴承、腹板以及液压执行器固定结构,变桨轴承包括外圈、内圈以及外圈和内圈之间的滚子,外圈外周固定连接轮毂,内圈内侧连接有腹板且内圈外周连接有叶片；腹板上与轮毂同向设有凸起结构和至少一个人孔结构,轮毂内侧转动连接有液压执行器一端,液压执行器另一端通过液压执行器固定结构连接凸起结构上部,且液压执行器与凸起结构连接的端部设有球形轴承；本发明设计的液压变桨系统机构紧凑、体积小、占用空间少,方便维护；单腹板结构有效降低制造成本,腹板上凸起结构一体成型,省去单独的连接部件,节省制造成本,降低了液压变桨系统轴承组件的装配工艺复杂程度。(The invention discloses a bearing assembly of a hydraulic pitch system of a wind generating set, which comprises a hydraulic actuator, a pitch bearing, a web plate and a hydraulic actuator fixing structure, wherein the pitch bearing comprises an outer ring, an inner ring and a roller between the outer ring and the inner ring; a convex structure and at least one manhole structure are arranged on the web plate in the same direction as the hub, one end of a hydraulic actuator is rotatably connected to the inner side of the hub, the other end of the hydraulic actuator is connected with the upper part of the convex structure through a hydraulic actuator fixing structure, and a spherical bearing is arranged at the end part of the hydraulic actuator connected with the convex structure; the hydraulic variable-pitch system designed by the invention has the advantages of compact structure, small volume, small occupied space and convenience in maintenance; the single-web structure effectively reduces the manufacturing cost, the convex structure on the web is integrally formed, an independent connecting part is omitted, the manufacturing cost is saved, and the complexity of the assembly process of the bearing assembly of the hydraulic variable pitch system is reduced.)

1. A bearing assembly of a hydraulic pitch control system of a wind generating set is characterized by comprising a hydraulic actuator, a pitch control bearing, a web plate and a hydraulic actuator fixing structure, wherein the pitch control bearing comprises an outer ring, an inner ring and a roller between the outer ring and the inner ring, and is used for relative rotation between the outer ring and the inner ring along a rotation axis;

the web plate is provided with a convex structure and at least one manhole structure in the same direction as the hub, the inner side of the hub is rotatably connected with one end of a hydraulic actuator, the other end of the hydraulic actuator is connected with the upper part of the convex structure through a hydraulic actuator fixing structure, and the end part of the hydraulic actuator connected with the convex structure is provided with a spherical bearing.

2. The wind generating set hydraulic pitch system bearing assembly of claim 1, the boss structure is in a long strip shape and is symmetrical relative to the axis of the variable-pitch bearing, the height of the boss structure and the connecting position of the hydraulic actuator on the wheel hub are parallel and level relative to the installation plane of the web plate and the variable-pitch bearing, grooves for inserting the pin shaft are arranged at two ends of the long strip structure, a pressure plate arranged at the upper part of the fixed structure of the hydraulic actuator is fixed on the boss structure through bolts, sleeves are sleeved outside the bolts and are clamped between the pressure plate and the boss structure, the hydraulic actuator fixing structure is used for limiting the radial movement of the pin shaft, the lower end of the pin shaft arranged on the hydraulic actuator fixing structure is inserted into the groove of the protruding structure, the upper portion of the pin shaft penetrates through the bearing support, the spherical bearing of the hydraulic actuator and the pressing plate, and the top of the pin shaft is connected with the pressing sheet fixed on the pressing plate and used for limiting the axial movement of the pin shaft.

3. The wind generating set hydraulic pitch system bearing assembly according to claim 2, wherein the pin is of a stepped cylindrical structure and is provided with a small diameter end, a large diameter end and a step position, the small diameter end is in fit connection with the groove of the protruding structure, the large diameter end is in fit connection with the radial shaft hole of the pressure plate, and the step position is in contact with the spherical bearing inner ring at the end part of the hydraulic actuator to limit the axial movement of the end part of the hydraulic actuator along the pin.

4. The wind generating set hydraulic pitch system bearing assembly according to claim 2, wherein the bearing support is of a circular ring structure, the lower end of the bearing support is in contact with the convex structure, and the upper end of the bearing support is in contact with the spherical bearing inner ring and used for limiting the movement of the spherical bearing inner ring at the end of the hydraulic actuator along the axis direction of the spherical bearing inner ring.

5. The wind generating set hydraulic pitch system bearing assembly according to claim 2, wherein the sleeve is a plurality of hollow cylinders of the same size or an integrally formed semicircular structural member, and the length of the sleeve controls the distance between the pressure plate and the web.

6. The wind generating set hydraulic pitch system bearing assembly according to claim 2, wherein the pressing plate is a plate-shaped structural member, and the pressing plate is fixed on the pressing plate through a bolt and located at the upper part of the pin shaft and used for pressing the pin shaft to limit the axial movement of the pin shaft.

7. The wind generating set hydraulic pitch system bearing assembly according to claim 1, wherein the protruding structure is a hollow conical structure and is located on the web plate on one side close to the hub, the height of the protruding structure is flush with the connecting position of the hydraulic actuator on the hub relative to the mounting plane of the web plate and the pitch bearing, a pin shaft is arranged at the upper part of the protruding structure, the pin shaft penetrates through the inner ring of the spherical bearing, a pressing sheet is fixed at the upper end part of the pin shaft through a bolt and used for limiting the axial automation degree of the inner ring of the spherical bearing, and the other end of the hydraulic actuator is hinged to the.

8. The wind generating set hydraulic pitch system bearing assembly according to claim 1, wherein the web is in a shape of a disc or a long strip plate, and the web is connected with the end face of one side, close to the hub, of the inner ring of the pitch bearing.

9. The wind generating set hydraulic pitch system bearing assembly of claim 1, wherein the raised structure, the manhole structure and the web are integrally formed for enhancing the rigidity of the web, and the manhole structure is used for maintenance personnel to pass through.

Technical Field

The invention relates to the technical field of wind power generation, in particular to a bearing assembly of a hydraulic pitch system of a wind generating set.

Background

The variable-pitch wind generating set achieves the purposes of adjusting the generating power of the wind generating set and controlling the wind load by changing the pitch angle of the blades.

The existing wind driven generator variable pitch system mainly has two technical forms of electric and hydraulic, wherein the hydraulic variable pitch system is applied to a wind driven generator set with continuously lengthened blades, continuously increased capacity and high stability requirement in a large scale with the characteristics of large output torque per unit mass, few electric elements, high stability and the like in a foreseeable manner;

the hydraulic variable pitch system of the impeller part mainly comprises: hydraulic actuator, become oar bearing assembly.

The blade root load of the wind generating set is increased due to the fact that the blades of the wind generating set are lengthened continuously, and the common method is to enlarge a reinforcing hub and a variable-pitch bearing, so that the overall cost of the wind generating set is increased;

the variable-pitch bearing assembly provided by CN206770136 comprises two webs and a fixing seat assembly, and can effectively enhance the rigidity of the variable-pitch bearing and the whole impeller system, and improve the stress condition, wherein the fixing seat can better support the hydraulic actuator to connect the pin shaft, so as to improve the stress condition of the pin shaft, and the deformation condition of the webs is reduced by the design of the fixing seat between the two webs, but the scheme has more component parts, complex assembly and high manufacturing cost.

The WO2012069062 variable-pitch bearing assembly comprises a fixed web and an annular driving structural member, the rigidity of the variable-pitch bearing and the rigidity of the whole impeller system can be effectively enhanced, the stress condition is improved, the hydraulic actuator is arranged on the fixed web, and the force transmission part of the actuator is not arranged on the whole disc-shaped web, so that materials can be saved, and the raw material cost is reduced. The structural part of the scheme has the advantages of complex modeling, difficult assembly and higher manufacturing cost.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a bearing assembly of a hydraulic pitch system of a wind generating set.

The technical scheme adopted by the invention for solving the technical problems is as follows: a bearing assembly of a hydraulic pitch control system of a wind generating set comprises a hydraulic actuator, a pitch control bearing, a web plate and a hydraulic actuator fixing structure, wherein the pitch control bearing comprises an outer ring, an inner ring and a roller between the outer ring and the inner ring, and is used for relative rotation between the outer ring and the inner ring along a rotation axis;

the web plate is provided with a convex structure and at least one manhole structure in the same direction as the hub, the inner side of the hub is rotatably connected with one end of a hydraulic actuator, the other end of the hydraulic actuator is connected with the upper part of the convex structure through a hydraulic actuator fixing structure, and the end part of the hydraulic actuator connected with the convex structure is provided with a spherical bearing.

The hydraulic actuator fixing structure comprises a boss structure, a hydraulic actuator, a web plate, a pin shaft, a groove, a bearing support, a spherical bearing of the hydraulic actuator and a pressing plate, wherein the boss structure is in a long strip shape and is symmetrical relative to the axis center of a pitch bearing, the height of the boss structure and the connecting position of the hydraulic actuator on a wheel hub are parallel and level relative to the web plate and the mounting plane of the pitch bearing, the two ends of the long strip structure are provided with grooves for inserting the pin shaft, the pressing plate arranged on the upper portion of the hydraulic actuator fixing structure is fixed on the boss structure through bolts, the bolt is externally sleeved with a sleeve and clamped between the pressing plate and the boss structure, the radial movement of the pin shaft is limited, the lower end of the pin shaft arranged on the hydraulic actuator.

Specifically, the pin shaft is of a stepped cylindrical structure and is provided with a small-diameter end, a large-diameter end and a step position, the small-diameter end is connected with the groove of the protruding structure in a matched mode, the large-diameter end is connected with the radial shaft hole of the pressing plate in a matched mode, and the step position is in contact with the inner ring of the spherical bearing at the end portion of the hydraulic actuator to limit the end portion of the hydraulic actuator to move axially along the pin shaft.

Specifically, the bearing support adopts a circular ring-shaped structure, the lower end of the bearing support is in contact with the convex structure, and the upper end of the bearing support is in contact with the spherical bearing inner ring and is used for limiting the movement of the ball bearing inner ring at the end part of the hydraulic actuator along the axis direction of the ball bearing inner ring.

Specifically, the sleeve adopts a plurality of hollow cylinders with the same size or an integrally formed semicircular structural part, and the length of the sleeve controls the distance between the pressing plate and the web plate.

Specifically, the pressing sheet is a plate-shaped structural member, is fixed on the pressing plate through a bolt and is positioned at the upper part of the pin shaft, and is used for pressing the pin shaft to limit the axial movement of the pin shaft.

The hydraulic actuator comprises a web, a hub, a hydraulic actuator, a spherical bearing inner ring, a protruding structure, a pin shaft, a pressing sheet and a bolt, wherein the protruding structure is a hollow conical structure and is located on the web and close to one side of the hub, the height of the protruding structure and the connecting position of the hydraulic actuator on the hub are parallel and level to the mounting plane of the web and the variable pitch bearing, the pin shaft is arranged on the upper portion of the protruding structure and penetrates through the spherical bearing inner ring, the pressing sheet is fixed to the upper end portion of the pin shaft through the.

Specifically, the web is disc-shaped or long-strip plate-shaped, and the web is connected with the end face of one side, close to the hub, of the variable-pitch bearing inner ring.

Specifically, the raised structure and the manhole structure are integrally formed with the web and used for enhancing the rigidity of the web, and the manhole structure is used for maintenance personnel to pass through.

The invention has the following beneficial effects:

the hydraulic variable-pitch system designed by the invention has the advantages of compact structure, small volume, small occupied space and convenience in maintenance; the single-web structure effectively reduces the manufacturing cost, the convex structure on the web is integrally formed, an independent connecting component is omitted, the manufacturing cost is further saved, the structure is simple, and the complexity of the assembly process of the bearing assembly of the hydraulic variable pitch system is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of a hydraulic pitch system of a wind generating set;

FIG. 2 is a schematic structural diagram of a bearing assembly of a hydraulic pitch system of a wind generating set;

FIG. 3 is a schematic structural view of a fixing structure of a hydraulic actuator according to an embodiment;

FIG. 4 is a schematic view of a web according to an embodiment;

fig. 5 is a schematic structural diagram of a second embodiment of a hydraulic pitch system of a wind generating set.

In the figure: 1-a hub; 2-a hydraulic actuator fixing structure; 3-a web; 4-a hydraulic actuator; 5-a pitch bearing; 2.1-pressing plate; 2.2-tabletting; 2.3-sleeve; 2.4-pin shaft; 2.5-bearing support; 3.1-raised structure; 3.2-manhole; 5.1-outer ring; 5.2-inner circle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in further detail in the following clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-5, a hydraulic pitch system bearing assembly of a wind generating set comprises a hydraulic actuator 4, a pitch bearing 5, a web 3 and a hydraulic actuator fixing structure 2, wherein the pitch bearing 5 comprises an outer ring 5.1, an inner ring 5.2 and a roller between the outer ring 5.1 and the inner ring 5.2, and is used for relative rotation between the outer ring 5.1 and the inner ring 5.2 along a rotation axis, the outer periphery of the outer ring 5.1 is fixedly connected with a hub 1, the inner side of the inner ring 5.2 is connected with the web 3, and the outer periphery of the inner ring 5.2 is connected with blades; protruding structure 3.1 and at least one manhole structure 3.2 are equipped with wheel hub 1 syntropy on the web 3, and wheel hub 1 inboard is rotated and is connected with 4 one ends of hydraulic actuator, and the hydraulic actuator 4 other end passes through hydraulic actuator fixed knot structure 2 and connects protruding structure 3.1 upper portion, and the tip that hydraulic actuator 4 and protruding structure 3.1 are connected is equipped with spherical bearing.

The web 3 is disc-shaped or strip-shaped, and the web 3 is connected with the end surface of one side of the inner ring of the variable pitch bearing 5, which is close to the hub 1; the raised structure 3.1 and the manhole structure 3.2 are integrally formed with the web 3 and used for enhancing the rigidity of the web 3, and the manhole structure 3.2 is used for maintenance personnel to pass through. The height of the protruding structure 3.1 and the connecting point of the actuator 4 on the hub 1 are parallel and level in the axial direction of the variable pitch bearing, so that the actuator 4 is ensured to move in a plane parallel to the web 3, the components in other directions are reduced, and the stress condition of the web 3 is improved.

As shown in fig. 1-4, in the dual-cylinder hydraulic pitch control system according to the embodiment of the present invention, the protrusion structure 3.1 is a long strip and is symmetrical with respect to the axis center of the pitch bearing 5, the height of the protrusion structure 3.1 is flush with the connection position of the hydraulic actuator 4 on the hub 1 with respect to the installation plane of the web 3 and the pitch bearing 5, the two ends of the long strip are provided with grooves into which the pin shaft 2.4 is inserted, the hydraulic actuator fixing structure 2 is used for connecting the end of the hydraulic actuator 4 and the web 3, and mainly comprises a pressure plate 2.1, a pressure plate 2.2, a sleeve 2.3, a pin shaft 2.4, a bearing support 2.5, and a; a spherical bearing is arranged at the end part of the hydraulic actuator 4, a pin shaft 2.4 penetrates through a pressure plate 2.1, an inner ring of the spherical bearing, a bearing support 2.5 and a round hole on a convex structure 3.1 on a web plate, and the end part of the hydraulic actuator 4 is fixed on the variable-pitch web plate 3 in a hinged mode; the distance between the pressure plate 2.1 and the web 3 is controlled by the length of the sleeve 2.3; the fastening bolt penetrates through the sleeve 2.3 to fixedly connect the pressure plate 2.1 with the web 3, the pressing plate 2.2 is fixed on the pressure plate 2.1 through the bolt to limit axial movement of the pin shaft 2.4, the pin shaft 2.4 has a step position, the step position is clamped on an inner ring of a ball bearing of the hydraulic actuator 4 to limit axial freedom degree of the inner ring of the ball bearing, the bearing support 2.5 is of a circular ring structure, one end of the bearing support 2.5 is in contact with the web boss structure 3.1, and the other end of the bearing support 2.5 is in contact with an inner ring of the ball bearing at the end part of the hydraulic actuator 4 and is used for limiting movement of.

The pin shaft 2.4 is of a stepped cylindrical structure and is provided with a small-diameter end, a large-diameter end and a step position, the small-diameter end is connected with the groove of the protruding structure in a matched mode, the large-diameter end is connected with the radial shaft hole of the pressing plate 2.1 in a matched mode, the step position is in contact with the inner ring of the spherical bearing at the end part of the hydraulic actuator 4, and the axial movement of the end part of the hydraulic actuator 4 along the pin shaft 2.4 is limited; the bearing support 2.5 adopts a circular structure, the lower end of the bearing support 2.5 is in contact with the convex structure 3.1, and the upper end of the bearing support 2.5 is in contact with the spherical bearing inner ring and is used for limiting the movement of the spherical bearing inner ring at the end part of the hydraulic actuator 4 along the axis direction of the spherical bearing inner ring; the sleeve 2.3 adopts a plurality of hollow cylinders with the same size or integrally formed semicircular structural parts, and the length of the sleeve 2.3 controls the distance between the pressure plate 2.1 and the web plate 3; the pressing sheet 2.2 is a plate-shaped structural member, and the pressing sheet 2.2 is fixed on the pressing sheet 2.1 through a bolt and is positioned at the upper part of the pin shaft 2.4 and used for pressing the pin shaft 2.4 to limit the axial movement of the pin shaft 2.4.

As shown in fig. 5, in the second single-cylinder hydraulic pitch control system according to the embodiment of the invention, the convex structure 3.1 in the single-cylinder hydraulic pitch control system is a hollow conical structure distributed on a pitch circle of which the crank of the pitch crank structure is a radius and is located on the web 3 near one side of the hub 1, and the height of the convex structure 3.1 is flush with the connecting position of the hydraulic actuator 4 on the hub 1 relative to the mounting plane of the web 3 and the pitch bearing 5; the variable-pitch bearing 5, the web 3 and the hydraulic actuator fixing structure 2 jointly form a variable-pitch system bearing assembly, wherein an outer ring 5.1 of the variable-pitch bearing 5 is connected with the hub 1, an inner ring 5.2 is connected with the web 3 and the blades, a protruding structure 3.1 on the web 3 is conical, a pin shaft is generated at the end part and penetrates through an inner ring of a spherical bearing at the end part of the hydraulic actuator 4, and a fixing pressing sheet is fixed at the end part of the pin shaft through a bolt and used for limiting the axial automation degree of the inner ring of the. The other end of the hydraulic actuator 4 is hinged with the hub 1, a hydraulic rod of the hydraulic actuator 4 stretches to generate a push-pull force which is transmitted to an inner ring 5.2 of the variable-pitch bearing 5 through the web 3 in a torque mode, and the end part of the actuator 4 connected with the web 3 rotates around the axis of the variable-pitch bearing 5 to perform crank connecting rod action so as to drive the blades to rotate around the rotating shaft of the variable-pitch bearing to complete variable-pitch action.

The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.

The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.