Wind wheel of wind driven generator and variable-pitch bearing thereof
阅读说明：本技术 风力发电机的风轮及其变桨轴承 (Wind wheel of wind driven generator and variable-pitch bearing thereof ) 是由 张楚翔 孙刚峰 祝蕴龙 李永奎 刘二恩 江魏 张明辉 温斌 白海松 杨海锋 于 2019-10-30 设计创作，主要内容包括：本发明涉及一种风力发电机的风轮及其变桨轴承。变桨轴承,包括外圈和内圈；外圈与内圈中的一个上设有进油口和出油口；以第一直径为边界将变桨轴承分为迎风侧和背风侧；背风侧以第二直径为边界分为第一区域和第二区域；第一直径和第二直径相互垂直；第一区域和第二区域内分别设有排油区；所述排油区上设置的出油口的数量和/或大小能够满足变桨轴承的整体排油要求。根据油脂的排出情况,在油脂排出量较大的部位设置数量和/或大小能够满足变桨轴承的整体排油要求的出油口,使旧油脂能够顺利从润滑滚道中排出,通过上述方式,避免旧油脂堆积导致的泄漏、磨损以及油脂流动性差的问题,从而保证了变桨轴承的润滑。(The invention relates to a wind wheel of a wind driven generator and a variable pitch bearing thereof. The variable-pitch bearing comprises an outer ring and an inner ring; one of the outer ring and the inner ring is provided with an oil inlet and an oil outlet; dividing the pitch bearing into a windward side and a leeward side by taking the first diameter as a boundary; the leeward side is divided into a first area and a second area by taking the second diameter as a boundary; the first diameter and the second diameter are perpendicular to each other; the first area and the second area are respectively provided with an oil discharge area; the number and/or size of oil outlets arranged on the oil discharge area can meet the integral oil discharge requirement of the variable-pitch bearing. According to the oil discharge condition, the oil outlets with the quantity and/or size capable of meeting the overall oil discharge requirement of the variable-pitch bearing are arranged at the positions with large oil discharge amount, so that the old oil can be smoothly discharged from the lubricating roller path.)
1. The variable-pitch bearing comprises an outer ring and an inner ring; one of the outer ring and the inner ring is provided with an oil inlet and an oil outlet;
dividing the pitch bearing into a windward side and a leeward side by taking the first diameter as a boundary;
the leeward side is divided into a first area and a second area by taking the second diameter as a boundary; the first diameter and the second diameter are perpendicular to each other;
the method is characterized in that: the first area and the second area are respectively provided with an oil discharge area;
the number and/or size of oil outlets arranged on the oil discharge area can meet the integral oil discharge requirement of the variable-pitch bearing.
2. A pitch bearing according to claim 1, wherein: the central angle of the pitch bearing corresponding to each oil discharge area is 65-75 degrees.
3. A pitch bearing according to claim 1 or 2, wherein: one side of the oil drainage area is bounded by a first diameter.
4. A pitch bearing according to claim 1 or 2, wherein: the oil discharge area is provided with an oil inlet, and the oil inlet and the oil outlet on the oil discharge area are arranged at intervals.
5. A pitch bearing according to claim 4, wherein: and at least two oil outlets are arranged between the adjacent oil inlets in the same row on the oil discharge area.
6. A pitch bearing according to claim 1 or 2, wherein: the windward side is provided with an oil inlet and an air vent without an oil outlet;
the air holes are used for balancing the pressure of the lubricating roller path on the windward side.
7. A pitch bearing according to claim 6, wherein: an oil inlet and an air vent are formed in the windward side;
the oil inlet and the air vent on the windward side are both arranged near the second diameter.
8. A pitch bearing according to claim 1, wherein: the area of the leeward side near the second diameter is not provided with an oil outlet.
9. A pitch bearing according to claim 1, wherein: and the area of the leeward side near the second diameter is not provided with an oil inlet.
10. Aerogenerator's wind wheel, including wind wheel main part, blade and change oar bearing, the blade is through changing oar bearing assembly to the wind wheel main part on, its characterized in that: a pitch bearing according to any of claims 1-9.
Technical Field
The invention relates to a wind wheel of a wind driven generator and a variable pitch bearing thereof.
Background
In the wind driven generator, a blade is arranged on a wind wheel main body through a variable pitch bearing, and the variable pitch bearing is used for adjusting the windward angle of the blade, so that the control of the output power of the blade and the guarantee of the safety of the blade are realized, and the variable pitch bearing is a key component of the wind driven generator. In order to ensure the use reliability and the service life of the variable pitch bearing, the variable pitch bearing needs to be well sealed and lubricated. The lubrication of the variable pitch bearing needs to meet the requirement that new grease is continuously, fully and uniformly injected into the lubricating roller path and smoothly flows in the lubricating roller path so as to realize the smooth discharge of waste grease.
The variable-pitch bearing comprises a first diameter and a second diameter perpendicular to the first diameter, the variable-pitch bearing is divided into a windward side and a leeward side along the first diameter, the windward side is located on the front side of the wind wheel, and the leeward side is located on the rear side of the wind wheel. Because the existence of wind wheel angle of elevation and blade cone angle, the leeward side of becoming the oar bearing is in the position that leans on relatively all the time, leads to becoming the oar bearing no matter what kind of mode of fetching oil, and in the course of the work of fan, the grease all can be because of receiving the effect of gravity and centrifugal force and piling up the leeward side.
The application publication number is CN103671558A, and the application publication date is 2014, 03, 26, the invention patent application discloses a lubricating oil path structure of a variable pitch bearing of a wind generating set, wherein oil inlet holes and oil outlet holes in each row of rolling ways in the variable pitch bearing of the patent are distributed at intervals, the oil inlet holes and the oil outlet holes in a first row respectively correspond to the oil outlet holes and the oil inlet holes in a second row, and the variable pitch bearing is used for injecting oil into the lubricating rolling ways through the oil inlet holes.
The mode that oil outlets are uniformly distributed is adopted in the comparison file, the purpose is to enable grease to be uniformly discharged from all areas of the variable-pitch bearing, and the actual situation is that the variable-pitch bearing is influenced by centrifugal force and gravity, so that most of grease in the lubricating roller path is gathered to the leeward side, and the possibility of achieving the purpose of the comparison file is low. And the oil outlet on the leeward side can not meet the requirement that old grease flows out from the lubricating roller path, and the old grease is accumulated in the lubricating roller path to influence the flow of new grease, so that the lubrication of the variable-pitch bearing is influenced, and the accumulation of the old grease can aggravate the grease leakage and the roller path abrasion.
Disclosure of Invention
The invention aims to provide a wind wheel of a wind driven generator, which is used for solving the problem that the existing pitch bearing in the prior art has the influence of the accumulation of old grease in a lubricating roller path on the flow of new grease, so that the lubrication of the pitch bearing is influenced.
In order to achieve the purpose, the technical scheme of the variable-pitch bearing is as follows: the variable-pitch bearing comprises an outer ring and an inner ring; one of the outer ring and the inner ring is provided with an oil inlet and an oil outlet;
dividing the pitch bearing into a windward side and a leeward side by taking the first diameter as a boundary;
the leeward side is divided into a first area and a second area by taking the second diameter as a boundary; the first diameter and the second diameter are perpendicular to each other;
the first area and the second area are respectively provided with an oil discharge area;
the number and/or size of oil outlets arranged on the oil discharge area can meet the integral oil discharge requirement of the variable-pitch bearing.
The variable-pitch bearing has the beneficial effects that: according to the oil discharge condition, the oil outlets with the quantity and/or size capable of meeting the overall oil discharge requirement of the variable-pitch bearing are arranged at the positions with large oil discharge amount, so that the old oil can be smoothly discharged from the lubricating roller path.
Further, the central angle of the pitch bearing corresponding to each oil discharge area is 65-75 degrees.
The variable-pitch bearing has the beneficial effects that the area on the leeward side close to the windward side is more accurately limited, and the oil discharge requirement of the variable-pitch bearing is favorably met.
Further, one side of the oil discharge area is bounded by a first diameter.
The oil-discharging device has the advantages of being more suitable for practical conditions and beneficial to oil discharging.
Further, the oil discharge area is provided with an oil inlet, and the oil inlet and the oil outlet on the oil discharge area are arranged at intervals.
The lubricating device has the beneficial effect of being beneficial to the lubrication of the oil discharging area.
Furthermore, at least two oil outlets are arranged between the adjacent oil inlets in the same row on the oil discharge area.
The oil-discharging device has the beneficial effect of facilitating oil discharge.
Furthermore, the windward side is provided with an oil inlet and an air hole without an oil outlet;
the air holes are used for balancing the pressure of the lubricating roller path on the windward side.
The variable-pitch bearing has the beneficial effects that the oil outlet is not arranged, the number of unnecessary oil holes is reduced, the bearing processing is convenient, the cost is reduced, the air holes are arranged for balancing the pressure of the lubricating roller path on the windward side when the variable-pitch bearing enters oil through the oil inlet, and the flow of new grease is facilitated.
Further, an oil inlet and an air vent are formed in the windward side;
the oil inlet and the air vent on the windward side are both arranged near the second diameter.
The lubricating grease channel has the beneficial effects that a certain grease space is reserved in the lubricating grease channel, so that the fluidity of the lubricating grease channel is ensured.
Further, the area of the leeward side near the second diameter is not provided with an oil outlet.
The variable-pitch bearing has the advantages that grease on the leeward side close to the area near the second diameter can flow out of the oil outlet at the oil discharge area by means of the flow of the grease, and the oil discharge requirement of the variable-pitch bearing is not influenced, so that the number of unnecessary oil holes can be reduced by adopting the form, the bearing is convenient to process, and the cost is reduced.
Further, the area of the leeward side near the second diameter is not provided with an oil inlet.
The sealing ring has the advantages that wind power acts on the blades, the blades apply force towards the leeward side along the second diameter to the inner ring or the outer ring of the variable pitch bearing, the inner ring of the variable pitch bearing has certain offset relative to the outer ring of the variable pitch bearing, the sealing performance of the sealing ring is affected, the possibility of leakage of grease at the gap of the sealing ring can be increased due to excessive injected grease at the two sides of the leeward side second diameter, the grease gathered at the two sides of the leeward side second diameter flows and the rotation action of the inner ring and the outer ring can meet the lubricating requirement of the bottleneck area, and therefore the two sides of the leeward side second diameter are not provided and are more favorable for ensuring lubrication and grease discharge.
The technical scheme of the wind wheel of the wind driven generator is as follows: a wind wheel of a wind driven generator comprises a wind wheel main body, blades and a variable pitch bearing, wherein the blades are assembled on the wind wheel main body through the variable pitch bearing,
the variable-pitch bearing comprises an outer ring and an inner ring; one of the outer ring and the inner ring is provided with an oil inlet and an oil outlet;
dividing the pitch bearing into a windward side and a leeward side by taking the first diameter as a boundary;
the leeward side is divided into a first area and a second area by taking the second diameter as a boundary; the first diameter and the second diameter are perpendicular to each other;
the first area and the second area are respectively provided with an oil discharge area;
the number and/or size of oil outlets arranged on the oil discharge area can meet the integral oil discharge requirement of the variable-pitch bearing.
The variable-pitch bearing has the beneficial effects that: according to the oil discharge condition, the oil outlets with the quantity and/or size capable of meeting the overall oil discharge requirement of the variable-pitch bearing are arranged at the positions with large oil discharge amount, so that the old oil can be smoothly discharged from the lubricating roller path.
Further, the central angle of the pitch bearing corresponding to each oil discharge area is 65-75 degrees.
The variable-pitch bearing has the beneficial effects that the area on the leeward side close to the windward side is more accurately limited, and the oil discharge requirement of the variable-pitch bearing is favorably met.
Further, one side of the oil discharge area is bounded by a first diameter.
The oil-discharging device has the advantages of being more suitable for practical conditions and beneficial to oil discharging.
Further, the oil discharge area is provided with an oil inlet, and the oil inlet and the oil outlet on the oil discharge area are arranged at intervals.
The lubricating device has the beneficial effect of being beneficial to the lubrication of the oil discharging area.
Furthermore, at least two oil outlets are arranged between the adjacent oil inlets in the same row on the oil discharge area.
The oil-discharging device has the beneficial effect of facilitating oil discharge.
Furthermore, the windward side is provided with an oil inlet and an air hole without an oil outlet;
the air holes are used for balancing the pressure of the lubricating roller path on the windward side.
The variable-pitch bearing has the beneficial effects that the oil outlet is not arranged, the number of unnecessary oil holes is reduced, the bearing processing is convenient, the cost is reduced, the air holes are arranged for balancing the pressure of the lubricating roller path on the windward side when the variable-pitch bearing enters oil through the oil inlet, and the flow of new grease is facilitated.
Further, an oil inlet and an air vent are formed in the windward side;
the oil inlet and the air vent on the windward side are both arranged near the second diameter.
The lubricating grease channel has the beneficial effects that a certain grease space is reserved in the lubricating grease channel, so that the fluidity of the lubricating grease channel is ensured.
Further, the area of the leeward side near the second diameter is not provided with an oil outlet.
The variable-pitch bearing has the advantages that grease on the leeward side close to the area near the second diameter can flow out of the oil outlet at the oil discharge area by means of the flow of the grease, and the oil discharge requirement of the variable-pitch bearing is not influenced, so that the number of unnecessary oil holes can be reduced by adopting the form, the bearing is convenient to process, and the cost is reduced.
Further, the area of the leeward side near the second diameter is not provided with an oil inlet.
The sealing ring has the advantages that wind power acts on the blades, the blades apply force towards the leeward side along the second diameter to the inner ring or the outer ring of the variable pitch bearing, the inner ring of the variable pitch bearing has certain offset relative to the outer ring of the variable pitch bearing, the sealing performance of the sealing ring is affected, the possibility of leakage of grease at the gap of the sealing ring can be increased due to excessive injected grease at the two sides of the leeward side second diameter, the grease gathered at the two sides of the leeward side second diameter flows and the rotation action of the inner ring and the outer ring can meet the lubricating requirement of the bottleneck area, and therefore the two sides of the leeward side second diameter are not provided and are more favorable for ensuring lubrication and grease discharge.
Drawings
Fig. 1 is a schematic structural view of a
FIG. 2 is a cross-sectional view of the pitch bearing of FIG. 1 taken along a diameter;
FIG. 3 is a schematic layout view of oil inlets and air vents in an oil inlet area BH on the windward side in FIG. 1;
FIG. 4 is a schematic layout diagram of oil inlets and oil outlets on the first oil discharging area CD in FIG. 1;
FIG. 5 is a schematic layout view of an oil inlet, an oil outlet and air vents on the pitch bearing in FIG. 1;
fig. 6 is a schematic layout view of oil inlets and air vents on an oil inlet area BH on the windward side in a wind wheel of a wind turbine according to an
fig. 7 is a schematic layout view of an oil inlet, an oil outlet and an air vent on a pitch bearing in
figure 8 is a schematic structural view of a
FIG. 9 is a cross-sectional view of the pitch bearing of FIG. 8;
FIG. 10 is a schematic layout view of an oil inlet, an oil outlet and an air vent on the pitch bearing in FIG. 8;
fig. 11 is a schematic layout view of an oil inlet, an oil outlet and an air vent on a pitch bearing of a wind wheel of a wind turbine according to an
in the figure: 1. the wind wheel comprises an outer ring, 2, an inner ring, 3, an upper lubricating raceway, 4, a lower lubricating raceway, 5, a raceway spacer, 6, an outer seal, 7, an inner seal, 8, a wind wheel main body, 9, a vent hole, 10, an oil inlet, 11, an oil outlet, 201, an outer ring, 202, an inner ring, 203, an upper lubricating raceway, 204, a lower lubricating raceway, 205, a raceway spacer, 206, an outer seal, 207, an inner seal, 301, an oil inlet, 302 and a vent hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are only a subset of, and not all embodiments of the application. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present application are described in further detail below with reference to examples.
In the
Because the function of a wind rotor is to convert wind energy into kinetic energy, the wind rotor is usually in a position facing the wind during actual operation. According to this, a first diameter CG (shown in fig. 1) is defined on the pitch bearing, which is delimited by the first diameter CG as a front side, on the windward side, and on the leeward side, on the rear side. For convenience of description, a second diameter AE is defined on the pitch bearing, the first diameter CG and the second diameter AE are perpendicular to each other and intersect at a center O of a circle where the pitch bearing is located, an area CE on a leeward side constitutes a first area, and an area GE on the leeward side constitutes a second area.
As shown in fig. 1, the leeward side includes a first oil discharge area CD, a second oil discharge area GF and a bottleneck area DF, a central angle ∠ COD corresponding to the first oil discharge area CD and a central angle ∠ FOG corresponding to the second oil discharge area are both 75 °, the bottleneck area DF is aligned to a central angle ∠ DOF of 30 °, as shown in fig. 4 and 5, taking the first oil discharge area CD as an example, the first oil discharge area CD is provided with an oil inlet 10 and an oil outlet 11, an oil collection bottle is installed at the oil outlet 11, two oil outlets 11 are installed between two adjacent oil inlets 10 along the extending direction of the lubricating raceways, the arc length of the oil inlet 10 on the upper lubricating raceway 3 corresponds to the position of the oil inlet 10 on the lower lubricating raceway 4, the position of the oil outlet DF 11 on the upper lubricating raceway 3 corresponds to the position of the oil outlet DF 11 on the lower lubricating raceway 4, in the corresponding lubricating raceways, the interval between two adjacent oil outlets 11 and the oil inlet and the oil outlet corresponding oil outlet is 274mm on the circumference (as shown in fig. 5, the two adjacent oil outlets and the oil outlet 11 and the oil outlet are not installed in the same manner as the oil discharge area CD 1, and the oil outlet is not installed on the second oil discharge area DF, and the oil discharge area DF by means of the oil outlet 2, and the oil outlet is not installed on the first oil discharge area CD 2, and the oil discharge area CD.
As shown in fig. 1, the windward side includes an oil inlet area BH, a first vacant area BC and a second vacant area HG, a central angle ∠ BOH corresponding to the oil inlet area BH is 130 °, a central angle ∠ BOC corresponding to the first vacant area BC and a central angle ∠ HOG corresponding to the second vacant area HG are both 25 °, as shown in fig. 3 and 5, both the upper lubricating raceway 3 and the lower lubricating raceway 4 on the oil inlet area BH are provided with oil inlets 10, the oil inlets 10 on the upper lubricating raceway 3 and the oil inlets 10 on the lower lubricating raceway 4 are arranged in a staggered manner, the interval between adjacent oil inlets 10 on the upper lubricating raceway 3 is the same as the interval between adjacent oil inlets 10 on the lower lubricating raceway 4, a raceway interval portion 5 at the oil inlet area BH is provided with air holes 9, a waterproof vent cap is installed at the air holes 9, the position of the air holes 9 is staggered from the oil inlets 10, the diameter of the air holes is phi 10, the arc length corresponding to the circumference between the oil inlets 9 and the adjacent oil inlets 10 on the upper lubricating raceway 3 is 274mm, the arc length corresponding to the arc length between the air holes 274mm, the air holes 9 and the second gap between the upper lubricating raceway 4 and the adjacent lubricating raceway 4 (as shown in the upper arc length of the lubricating raceway 5).
Become and need set up stifled consent on oar bearing's
In this embodiment, the size of the
In this embodiment, the diameter of the
As shown in fig. 6 and 7, the wind wheel of the wind power generator of
Secondly, the central angle that first oil extraction district and second oil extraction district correspond is 65, and the central angle that the oil feed district corresponds is 140.
In
Second, the corresponding angle of the oil inlet area is 130 °.
As shown in fig. 11, a wind wheel of the wind turbine of
Secondly, the arrangement form of the oil inlet and the air vent on the oil inlet area is shown in figure 3.
In other embodiments, the angles of the central angles of the first oil discharge area and the second oil discharge area can be adjusted according to actual use conditions, and preferably, the angle of the central angle of each oil discharge area is 65-75 °.
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