CN203670115U - Blade variable-pitch limiting structure and wind driven generator - Google Patents
Blade variable-pitch limiting structure and wind driven generator Download PDFInfo
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- CN203670115U CN203670115U CN201420022190.2U CN201420022190U CN203670115U CN 203670115 U CN203670115 U CN 203670115U CN 201420022190 U CN201420022190 U CN 201420022190U CN 203670115 U CN203670115 U CN 203670115U
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- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model provides a blade variable-pitch limiting structure used for a wind driven generator and the wind driven generator with the blade variable-pitch limiting structure. The blade variable-pitch limiting structure comprises a movable stop dog and a static stop dog, wherein the movable stop dog is arranged on a variable-pitch bearing moving ring or a blade flange, and the static stop dog is arranged on a variable-pitch bearing fixed ring. When a variable-pitch execution mechanism breaks down and blades do not rotate within a normal working angle range, the static stop dog will make contact the movable stop dog to stop further rotating of the blades. In this way, the blades are prevented from being out of control when rotating under the condition that the variable-pitch execution mechanism breaks down.
Description
Technical field
The utility model relates to technical field of wind power generation, and particularly a kind of blade of wind-driven generator becomes the limit structure of oar and adopts the wind-driven generator of this limit structure.
Background technique
Pitch-controlled system is the important component part of wind-driven generator, and pitch-controlled system, according to the requirement of air-blower control strategy, makes blade pass Guo Bian oar actuator be limited at certain angle.In actual applications, the scope that can set generating angle is (being that propeller pitch angle is in generating angular range inner blower normal power generation) between 0 °～5 °, and feathering is shut down the scope of angle between 87 °～90 °.
In wind-driven generator, conventionally rely on rotating coder to detect the physical location (propeller pitch angle) of blade, but due to the significance of above-mentioned two positions of blade, pitch-controlled system is also provided with pitch-controlled wind-driven generator vane propeller-changing limit function, blade need to be limited to certain angle according to operation.
The vane propeller-changing limit function of existing wind-driven generator is to realize under the condition that can normally work in Bian Jiang actuator, for example, in the time that Bian Jiang actuator can normally work, detect vane position information by block trigger sensor, position information is passed to variable blade control system by sensor, and vane position information is as carrying out the foundation that becomes oar action.
But, in wind-driven generator running, may there is becoming oar actuator failure, for example, pitch motor braking failure, adopts gear to become the change oar gear shaft fracture of oar form, adopt synchronous cog belt to become the toothed belt fracture of oar form, adopt the driver element fault of hydraulic vane change form etc.While there are these faults, not only blower fan cisco unity malfunction, also will cause blade out of control, and blade rotates freely around 360 °, axis.Blade becomes propeller angle generally between 0 °～90 ° normally, and blade forwards improper angular range to, will bring the additional infringement of other component, and tower cylinder is swept at extreme case blade tip position, causes blade broken, causes heavy losses.But when the change oar limit structure of existing blade of wind-driven generator is not suitable for Bian Jiang actuator and breaks down, blade angle exceeds the situation of normal range (NR).
Along with the development of wind-powered electricity generation industry, the safety of wind-driven generator is had higher requirement.Although it is lower to become the probability of oar actuator failure generation, once occur, likely brings very large infringement to wind-driven generator.
Model utility content
Therefore, the purpose of this utility model be to provide a kind of can be in the situation that Bian Jiang actuator breaks down also can be by the spacing blade limit structure within the scope of special angle, and adopt the wind-driven generator of this limit structure.
In addition, the limit structure of vane propeller-changing of the present utility model also has lock function, when during at special position, blade lock being fixed on to this position by spacing blade.
According to one side of the present utility model, a kind of vane propeller-changing limit structure for wind-driven generator is provided, described vane propeller-changing limit structure comprises and is arranged on the moving block on pitch variable bearings moving-coil or blade flange and is arranged on the quiet block on pitch variable bearings retainer ring, break down and blade rotary while exceeding normal operating angle scope when Bian Jiang actuator, quiet block contacts and stops blade to be further rotated with moving block.
Described quiet block can have the inclined surface towards moving block, between described inclined surface and pitch variable bearings moving-coil or blade flange, can form wedge shape space, and described moving block has the inclined surface towards quiet block, in the time that quiet block stops moving block, described moving block enters described wedge shape space and locked.
Described pitch variable bearings retainer ring is pitch variable bearings inner ring, and described quiet block is formed on pitch variable bearings inner ring.
Described pitch variable bearings retainer ring is pitch variable bearings outer ring, and described quiet block is formed on pitch variable bearings outer ring.
Described moving block is elastomer block, and described quiet block has rib, and in the time that moving block is stopped by quiet block, described moving block is blocked by described rib, and can not oppositely move.
Described moving block comprises the first moving block and the second moving block that interval predetermined angle arranges, described quiet block is between the first moving block and the second moving block, the described first moving block and the second moving block all have the inclined surface towards quiet block, and the surperficial two ends that described quiet block and brake hoop or blade flange are faced are mutually respectively towards the inclined surface of the first block and the second block.
Described quiet block comprises the first quiet block and the second quiet block that interval predetermined angle arranges, described moving block is between the first quiet block and the second quiet block, described the first quiet block and the second quiet block all have the inclined surface towards moving block, and the surperficial two ends that described moving block and pitch variable bearings retainer ring are faced are mutually respectively towards the inclined surface of the first quiet block and the second quiet block.
Described quiet block is arranged on pitch variable bearings retainer ring by bolt.
On the surface of described quiet block and/or moving block, be provided with cushion.
Between described moving block and pitch variable bearings moving-coil or blade flange, be formed with cutting mouth, from but moving block has elasticity.
According on the other hand of the present utility model, also provide a kind of wind-driven generator with above-mentioned vane propeller-changing limit structure.
According to the technical solution of the utility model, even the in the situation that of breaking down in Bian Jiang actuator, also blade pitch angle can be limited in particular range, thereby prevent blade rotation out of control and the infringement that brings.
Accompanying drawing explanation
Describe by the description of embodiment being carried out below in conjunction with accompanying drawing, above and other object of the present utility model and feature will become apparent, wherein:
Fig. 1 is the plan view that becomes the limit structure of oar according to the blade of wind-driven generator of an exemplary embodiment of the present utility model;
Fig. 2 is the sectional perspective diagram of the limit structure of Fig. 1;
Fig. 3 is that diagram is amplified in the part of the limit structure of Fig. 1;
Fig. 4 shows the part amplification diagram that blade is in the lock state;
Fig. 5 is the plan view that becomes the limit structure of oar according to the blade of wind-driven generator of another exemplary embodiment of the utility model;
Fig. 6 illustrates the part amplification diagram being in the lock state according to the blade of another exemplary embodiment.
Embodiment
The utility model design has proposed a kind of reliable spacing limit structure of blade that still can make the in the situation that of wind-driven generator pitching failure mechanisms.Described limit structure comprises and is arranged on the quiet block on pitch variable bearings retainer ring and is arranged on the moving block on pitch variable bearings moving-coil (brake hoop) or blade flange.Lost efficacy and blade rotary angle while exceeding normal operating angle scope at blade pitch device, moving block contacts with quiet block, thereby blocking vane is further rotated.Thus, the propeller pitch angle of blade is limited in setting range, and prevents that 360 °, blade from rotating freely.In addition, between moving block and quiet block, can form wedge shape contact, thereby realize braking by wedge-shaped structure, make blade be locked in spacing position.Below, describe exemplary embodiment of the present utility model in detail with reference to accompanying drawing.
Fig. 1 is the plan view that becomes oar limit structure according to the blade of wind-driven generator of an exemplary embodiment of the present utility model; Fig. 2 is the sectional perspective diagram of the limit structure of Fig. 1; Fig. 3 is that diagram is amplified in the part of the vane propeller-changing limit structure of Fig. 1; Fig. 4 shows the part amplification diagram that blade is in the lock state.
As depicted in figs. 1 and 2, pitch variable bearings 10(is pitch variable bearings inner ring here, also can be described as pitch variable bearings retainer ring) be mounted by means of bolts on wheel hub 100, brake hoop 20(is pitch variable bearings outer ring here, also can be described as pitch variable bearings moving-coil) be installed in rotation on the excircle of pitch variable bearings 10.Blower fan generator blade (not shown) is arranged on brake hoop 20, drives brake hoop 20 to rotate with respect to wheel hub 100 by Bian Jiang actuator (not shown), thereby adjusts and control the propeller pitch angle of blade.
In the example shown in Fig. 1-4, comprise the moving block 21 and 22 outstanding from the inner circumferential surface of brake hoop 20 according to the vane propeller-changing limit structure of the utility model exemplary embodiment, and being arranged on the quiet block 30 on pitch variable bearings 20, quiet block 30 is between the first moving block 21 and the second moving block 22.
When Bian Jiang actuator lost efficacy, blade turns clockwise and exceedes normal range of operation and while arriving the first spacing position, and quiet block 30 stops and prevents that blade from further turning clockwise by the first moving block 21.When Bian Jiang actuator lost efficacy, blade is rotated counterclockwise and exceedes normal range of operation and while arriving the second spacing position, quiet block 30 stops the second motion block 22, prevents that blade is further rotated counterclockwise.Therefore, by moving block and quiet block, the rotation of blade is limited in setting range, can prevents that blade 360 degree from rotating freely the infringement bringing.
As Figure 1-3, quiet block 30 is formed as towards the plane of inclination of moving block with the two ends, surperficial left and right that brake hoop 20 is faced mutually, thereby forms wedge-shaped structure between the outer surface of quiet block 30 and the inner circumferential surface of brake hoop 20.Particularly, between quiet block 30 left and right sides and brake hoop 20, form wedge shape space 33,34.The outer surface of moving block 21 and 22 is the plane of inclination towards quiet block 30.In the time that moving block 21 or 22 contacts with quiet block 30, contact with inclined surface between the two.When under effect of inertia, when moving block 21 or 22 enters in the wedge shape space 33,34 forming between quiet block 30 and brake hoop 20, by the self-locking action of wedge-shaped structure, moving block 21 or 22 is stuck, thereby has limited freely rotating of blade, as shown in Figure 4.
In order to reduce impact force, cushion 31 also can be set on the outer surface of quiet block 30, prevent the rigid collision of quiet block 30 and moving block 21 or 22.Obviously, also cushion can be arranged on moving block 21,22, or on quiet block 30 and moving block 21,22, cushion be all set.Can use rubber, polyurethane, teflon etc. to there is flexible material and make cushion.
Fig. 5 and Fig. 6 show the vane propeller-changing limit structure according to another exemplary embodiment of the utility model.As shown in Figure 5 and Figure 6, can be set to have elasticity by moving block 21 and 22, in the time that moving block 21 or 22 contacts with quiet block 30, moving block 21 or 22 is compressed, and impact energy is absorbed.Also can projection be set at the edge on the both sides of quiet block 30, form rib 40.When moving block enters after wedge shape space, moving block resilience, rib 40 can will move stop limits (as shown in Figure 6) in wedge shape space.Can utilize the elasticity of steel, at moving block position fluting, make moving block there is elasticity.
As example, under the condition allowing at blade structure, moving block 21 and 22 can be integrated with blade, is set directly on blade flange, or adopts that glass fibre reinforced plastics is pre-buried, the mode such as be threaded is fixed on blade inwall; Quiet block 30 can be integrally formed with pitch variable bearings 10, also can be arranged on pitch variable bearings with the bolt of wheel hub 100 by connecting pitch variable bearings 10, and wheel hub is fixed relatively.
Under normal circumstances, blade becomes oar scope α normally into 0 °-90 °, Figure 1 shows that the state of blade in the time of 90 ° of angles.If Bian Jiang actuator structural failure, wind carry or the effect of blade eccentric moment under turn clockwise while exceeding 90 °, the moving block 21 in brake hoop 20 left sides contacts with the left side of quiet block 30, under the inertial force effect of blade rotary, moving block 21 enters in the wedge-shaped structure between quiet block 30 and brake hoop 20, by the self-locking action of wedge shape, moving block 21 is stuck.When blade is rotated counterclockwise while exceeding 0 °, the moving block 22 on brake hoop 20 right sides contacts with the right side of quiet block 30, and enters wedge-shaped structure and locked.
Moving block 21,22 and sharf to relative position can be definite according to the spacing needed angle of blade.For example, near 90 ° of positions, require can lock at 100 °; Near 0 ° of position, require can lock-10 ° of positions.Like this, the angular range of blade rotation, even the in the situation that of breaking down in Bian Jiang actuator, also can be limited in-10 °～100 °.
Be arranged on the situation on pitch variable bearings for quiet block by bolt, after Bian Jiang actuator repairs, can complete by dismantling quiet block the contact of wedge shape self-locking, blade can regain the control of pitch-controlled system.
Although in the above-described embodiments, the moving block 21,22 being arranged on brake hoop is two, and the quiet block 30 being arranged on pitch variable bearings is one, but, as optional mode, also can will a moving block be set on brake hoop, and two quiet blocks are set on pitch variable bearings.In this case, two quiet blocks have the inclined surface towards moving block, and form wedge shape space between the surface of brake hoop, and the two ends, left and right of moving block have respectively the inclined surface towards quiet block, thereby in the time contacting with the quiet block of the left and right sides respectively, can be locked by wedge-shaped structure.
In addition, in the above-described embodiments, blades installation is on pitch variable bearings outer ring 20, and still, vane propeller-changing limit structure of the present utility model is also applicable to the situation of blades installation on pitch variable bearings inner ring.Situation for blades installation on pitch variable bearings inner ring, brake hoop is arranged between blade and pitch variable bearings outer ring, and moving block is arranged on the excircle of brake hoop, and quiet block is arranged on pitch variable bearings outer ring.
There is very strong versatility and applicability according to the vane propeller-changing limit structure of the utility model exemplary embodiment, can be applicable to the wind-driven generator of various change oar forms.In addition, described limit structure has higher use value, quiet block and moving block can be set in the situation that not changing wind-driven generator original structure, therefore, in the situation that not increasing too many cost, can significantly improve safety and the protective ability of wind-driven generator.In addition, described limit structure simple in structure, easy for installation, reliable effect, safeguards simple.
Although described exemplary embodiment of the present utility model above in detail, but under the utility model, in technical field, there is common practise person not departing from spirit and scope of the present utility model, can make various modifications and modification to embodiment of the present utility model.But should be appreciated that In the view of those skilled in the art, these are revised and modification will fall in the spirit and scope of the exemplary embodiment of the present utility model that claim limits.
Claims (11)
1. the vane propeller-changing limit structure for wind-driven generator, it is characterized in that, described vane propeller-changing limit structure comprises and is arranged on the moving block on pitch variable bearings moving-coil or blade flange and is arranged on the quiet block on pitch variable bearings retainer ring, break down and blade rotary while exceeding normal operating angle scope when Bian Jiang actuator, quiet block contacts and stops blade to be further rotated with moving block.
2. vane propeller-changing limit structure as claimed in claim 1, it is characterized in that, described quiet block has the inclined surface towards moving block, between described inclined surface and pitch variable bearings moving-coil or blade flange, form wedge shape space, and described moving block has the inclined surface towards quiet block, in the time that quiet block stops moving block, described moving block enters described wedge shape space and locked.
3. vane propeller-changing limit structure as claimed in claim 1, is characterized in that, described pitch variable bearings retainer ring is pitch variable bearings inner ring, and described quiet block is formed on pitch variable bearings inner ring.
4. vane propeller-changing limit structure as claimed in claim 1, is characterized in that, described pitch variable bearings retainer ring is pitch variable bearings outer ring, and described quiet block is formed on pitch variable bearings outer ring.
5. vane propeller-changing limit structure as claimed in claim 1, is characterized in that, described moving block is elastomer block, and described quiet block has rib, and in the time that moving block is stopped by quiet block, described moving block is blocked by described rib, and can not oppositely move.
6. the vane propeller-changing limit structure as described in any one in claim 1-5, it is characterized in that, described moving block comprises the first moving block and the second moving block that interval predetermined angle arranges, described quiet block is between the first moving block and the second moving block, the described first moving block and the second moving block all have the inclined surface towards quiet block, and the surperficial two ends that described quiet block and brake hoop or blade flange are faced are mutually respectively towards the inclined surface of the first block and the second block.
7. the vane propeller-changing limit structure as described in any one in claim 1-5, it is characterized in that, described quiet block comprises the first quiet block and the second quiet block that interval predetermined angle arranges, described moving block is between the first quiet block and the second quiet block, described the first quiet block and the second quiet block all have the inclined surface towards moving block, and the surperficial two ends that described moving block and pitch variable bearings retainer ring are faced are mutually respectively towards the inclined surface of the first quiet block and the second quiet block.
8. the vane propeller-changing limit structure as described in any one in claim 1-5, is characterized in that, described quiet block is arranged on pitch variable bearings retainer ring by bolt.
9. the vane propeller-changing limit structure as described in any one in claim 1-5, is characterized in that, on the surface of described quiet block and/or moving block, is provided with cushion.
10. vane propeller-changing limit structure as claimed in claim 5, is characterized in that, between described moving block and pitch variable bearings moving-coil or blade flange, is formed with cutting mouth.
11. 1 kinds of wind-driven generators, is characterized in that, described wind-driven generator has the vane propeller-changing limit structure as described in any one in claim 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420022190.2U CN203670115U (en) | 2014-01-14 | 2014-01-14 | Blade variable-pitch limiting structure and wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420022190.2U CN203670115U (en) | 2014-01-14 | 2014-01-14 | Blade variable-pitch limiting structure and wind driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN203670115U true CN203670115U (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420022190.2U Expired - Lifetime CN203670115U (en) | 2014-01-14 | 2014-01-14 | Blade variable-pitch limiting structure and wind driven generator |
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| Country | Link |
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| CN (1) | CN203670115U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726996A (en) * | 2014-01-14 | 2014-04-16 | 北京金风科创风电设备有限公司 | Blade variable pitch limiting structure and wind driven generator |
| CN112128066A (en) * | 2020-10-09 | 2020-12-25 | 杭州爱锐科技有限公司 | Robot with rain-shielding ring for blades of wind driven generator |
-
2014
- 2014-01-14 CN CN201420022190.2U patent/CN203670115U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726996A (en) * | 2014-01-14 | 2014-04-16 | 北京金风科创风电设备有限公司 | Blade variable pitch limiting structure and wind driven generator |
| CN112128066A (en) * | 2020-10-09 | 2020-12-25 | 杭州爱锐科技有限公司 | Robot with rain-shielding ring for blades of wind driven generator |
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Granted publication date: 20140625 |