CN113217577A - Wind power generation vibration damper - Google Patents
Wind power generation vibration damper Download PDFInfo
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- CN113217577A CN113217577A CN202110422688.2A CN202110422688A CN113217577A CN 113217577 A CN113217577 A CN 113217577A CN 202110422688 A CN202110422688 A CN 202110422688A CN 113217577 A CN113217577 A CN 113217577A
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- vibration damping
- vibration
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- damping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
- F16F15/085—Use of both rubber and metal springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to a vibration damper of a wind driven generator, which comprises a tower, a vibration damper with one end fixedly connected with the tower and an engine room fixedly connected with the other end of the vibration damper; the vibration damping device comprises a vibration damping base fixedly connected with the top of the tower, a vibration damping spring with one end fixedly connected with the vibration damping base and an engine room vibration damping seat fixedly connected with the other end of the vibration damping spring; the vibration reduction base is characterized in that a spring guide pillar is arranged on the upper surface of the middle of the vibration reduction base, cabin vibration reduction seat guide pillars are arranged on two sides of the spring guide pillar, threads are arranged at one end of each cabin vibration reduction seat guide pillar, and the cabin vibration reduction seats are detachably connected with the cabins through the threads. The invention has the advantages that the vibration is effectively reduced through the arranged vibration reduction system of the wind driven generator, so that the fan can work smoothly, and the service life of the wind driven generator is prolonged.
Description
Technical Field
The invention relates to the technical field of tower vibration reduction of wind generating sets, in particular to a wind generating set tower vibration reduction damper.
Background
The wind turbine generator system is usually provided with a heavy structure such as a nacelle and an impeller on the upper part of a tower of several tens of meters, and has the characteristics of high center of gravity, low tower rigidity and low resonance frequency. At present, with the development of wind power generation to offshore and high-capacity fans, the application of high-rise towers and flexible towers is more and more extensive. The problem of tower vibration is more pronounced as the tower height increases. The vibration phenomenon of a tower barrel can occur in the operation process of the wind turbine generator; and with the continuous increase of the wind speed, the vibration of the tower barrel is more serious. Long-term vibration can have a number of adverse effects on the operation of wind turbines, such as: reduced fit accuracy, increased wear of transmission components, etc.; more importantly, under the inducement effect of long-term vibration, cracks are easily generated at the welding seam position of the welded structural member due to stress concentration, and the fastening bolts between the structural members are loosened under the repeated vibration effect. The stability and reliability of the unit operation can be seriously influenced by the existence of the problems, and even the unit can collapse.
In order to reduce the tower destructive vibrations of a wind turbine due to wind, the prior art solutions are as follows: firstly, an interlayer is arranged between the connection part of the wind generating set equipment cabin and the tower barrel frame, sandy soil is filled in the interlayer, and friction generated by mutual movement of sand grains consumes vibration energy and reduces vibration when the tower vibrates. The mode is not only inconvenient to install, but also increases the load of the tower drum, sand and soil rarely move relatively along with the synchronous movement of the tower drum, and the vibration reduction effect is not ideal; in addition, because the difference of wind-force wind speed and the adjustment of the operating speed of wind turbine generator system, the vibration that the tower section of thick bamboo produced is dynamic change, and current fixed damping buffering vibrator can not timely adjust, has two kinds of situations: when the tower drum vibrates weakly, the damping is larger, or when the tower drum vibrates strongly, the damping is smaller, and the damping effect under the two conditions is greatly reduced.
Disclosure of Invention
The invention aims to provide a vibration damper of a wind driven generator, which has the characteristics of simple structure, convenience in use and easiness in maintenance.
In order to solve the technical problems, the invention provides the following technical scheme:
a vibration damper of a wind driven generator is used for damping vibration between a tower and a machine room; the lower end surface of the vibration damping device is fixedly connected with the tower, and the upper end surface of the vibration damping device is fixedly connected with the engine room; the vibration damping device comprises a vibration damping base fixedly connected with the top of the tower, a vibration damping spring with one end fixedly connected with the vibration damping base and an engine room vibration damping seat fixedly connected with the other end of the vibration damping spring; the upper surface of the middle part of the vibration damping base is provided with a spring guide pillar; the upper surface of the vibration damping base is provided with cabin vibration damping seat guide pillars which are arranged on two sides of the spring guide pillar; one end of the cabin vibration damping seat guide pillar is provided with threads, and the upper part of the cabin vibration damping seat guide pillar is provided with a guide pillar nut; the cabin vibration damping seat is provided with a guide post hole, the guide post hole is in sliding connection with a guide post of the cabin vibration damping seat, and the guide post nut is used for limiting the cabin vibration damping seat and preventing the wind driven generator from being separated from the vibration damping device in a limit state.
Furthermore, a hollow guide sleeve is arranged in the middle of the upper surface of the vibration damping base, the vibration damping device further comprises vibration damping rubber, one surface of the vibration damping rubber is arranged on the inner wall of the hollow guide sleeve, and the other surface of the vibration damping rubber is connected with the cabin vibration damping base in a sliding mode.
Furthermore, one side of the vibration damping rubber is provided with point-shaped bulges, and the side, provided with the bulges, of the vibration damping rubber is connected with the vibration damping seat of the engine room.
Furthermore, a base vibration reduction rubber plate is arranged on the lower surface of the vibration reduction base, and two sides of the base vibration reduction rubber plate are provided with point-shaped bulges.
Furthermore, an engine room vibration damping rubber plate is arranged on the upper surface of the engine room vibration damping seat, and point-shaped bulges are arranged on two surfaces of the engine room vibration damping rubber plate.
Further, the damping spring is a compression spring.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has simple structure, stable operation and convenient maintenance;
2. the vibration damping device arranged between the tower and the engine room can greatly reduce the vibration generated by the fan blades and the rotating device in the engine room, so that the service life of the wind driven generator is prolonged;
3. the lateral movement of the spring can be avoided through the arranged spring guide post, and the vertical movement of the spring during working is ensured;
4. the nut arranged on the guide post of the vibration attenuation seat of the engine room can limit the upward movement of the engine room in a limit state, so that the engine room is damaged;
5. the damping rubber arranged between the damping base and the cabin damping seat can increase the damping of the cabin damping seat and effectively reduce the vibration amplitude;
6. the grid arranged on the surface of the vibration reduction rubber can increase the contact area between the cabin vibration reduction seat and the vibration reduction base, increase the resistance and reduce the vibration amplitude of the fan during vibration;
7. the friction resistance between the cabin and the cabin vibration damping seat can be increased and the vibration of the fan can be absorbed by arranging the cabin vibration damping rubber plate on the upper surface of the cabin vibration damping seat and arranging the grids on the rubber plate;
8. through establishing the base damping rubber slab at damping base lower surface, can increase the area of contact of damping base and pylon, the anti-sliding coefficient of increase contact surface for the pylon is more firm with the damping base contact, reduces the vibration that just contacts and bring.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic view of the mounting structure of the present invention;
FIG. 3 is an enlarged view of FIG. 2 at B;
FIG. 4 is a schematic cross-sectional view taken at A-A of FIG. 1; (ii) a
FIG. 5 is a schematic view of a vibration damping mount of a nacelle
Fig. 6 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure: 1-cabin, 2-vibration damper, 3-tower, 10-guide post nut, 11-high strength nut, 12-high strength bolt, 20-vibration damper base, 21-base vibration damper rubber plate, 22-spring, 23-cabin vibration damper base, 24-cabin vibration damper rubber plate, 25-cabin vibration damper base guide post, 26-vibration damper rubber, 27-spring guide post, 200-vibration damper base mounting hole, 230-cabin vibration damper base mounting hole and 231-guide post hole.
Detailed Description
It should be noted at the outset that the discussion of any embodiment of the present invention is illustrative only and is not intended to suggest that the scope of the present disclosure (including the claims) is limited to these examples; there are many other variations of the different aspects of the invention as described above which are not provided in detail for the sake of brevity. Accordingly, other embodiments are within the scope of the following claims.
In addition, the drawings in the following description are only preferred embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained based on the drawings without inventive efforts. In addition, the present invention is not limited to these embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., is typically an orientation or positional relationship based on a coordinate system shown in the front view of the device itself or the corresponding sub-component, and that the set of coordinate systems will not rotate with it when other directional views are discussed. In addition, in the case of a rod-like or elongated member, the term "front end" and the term "head" have the same meaning, and the term "rear end" and the term "tail end" and the term "end" have the same meaning. Rather, the foregoing directional terms are used merely to facilitate describing the present application and to simplify the description, and they do not indicate or imply that the apparatus or component being referred to must have a particular orientation or be constructed and operated in a particular orientation without having been stated to the contrary or otherwise specified, and therefore should not be considered limiting of the scope of the present application; further, the terms "inner and outer" with respect to orientation refer to the inner and outer relative to the profile of the respective component itself.
Furthermore, spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the limit condition of the present invention refers to a condition that the wind power generator is unbalanced in a sudden high wind condition.
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
Please refer to fig. 1-5:
the embodiment provides a vibration damping device of a wind driven generator, which is used for damping vibration between a tower 1 and a machine room 3; the lower end face of the vibration damping device 2 is fixedly connected with the tower 1, and the upper end face of the vibration damping device 2 is fixedly connected with the engine room 3; the vibration damping device 2 comprises a vibration damping base 20 fixedly connected with the top of the tower 1, a vibration damping spring 22 with one end fixedly connected with the vibration damping base 20, and a cabin vibration damping seat 23 fixedly connected with the other end of the vibration damping spring 22; the upper surface of the middle part of the vibration damping base 20 is provided with a spring guide post 27; the upper surface of the vibration damping base 20 is provided with an engine room vibration damping base guide post 25, and the engine room vibration damping base guide posts 25 are arranged on two sides of the spring guide post 27; one end of the cabin vibration damping seat guide pillar 25 is provided with threads, and the upper part of the cabin vibration damping seat guide pillar 25 is provided with a guide pillar nut 10; the cabin vibration damping seat 20 is provided with a guide post hole 231, the guide post hole 231 is connected with the cabin vibration damping seat guide post 25 in a sliding manner, and the guide post nut 10 is used for limiting the cabin vibration damping seat 20; the diameter of the upper part of the guide post 25 of the vibration damping seat of the engine room is matched with the diameter of the hole of the base of the engine room, so that the base of the engine room is prevented from being dislocated when being subjected to transverse wind power.
The cabin vibration damping seat 23 is provided with a cabin vibration damping seat mounting hole 230, and the vibration damping base 20 is provided with a vibration damping base mounting hole 200; the tower 3 and the damping base 20 are fastened together through the damping base mounting hole 200 by using a high-strength bolt 12 and a high-strength nut 11; the nacelle 1 and the nacelle damper base 23 are fastened together with high-strength bolts 12 and high-strength nuts 11 through the nacelle damper base mounting holes 230.
The middle of the upper surface of the vibration damping base 20 is provided with a hollow guide sleeve, the vibration damping device 2 further comprises vibration damping rubber 26, one surface of the vibration damping rubber 26 is arranged on the inner wall of the hollow guide sleeve, and the other surface of the vibration damping rubber 26 is connected with the cabin vibration damping seat 23 in a sliding mode.
One surface of the vibration damping rubber 26 is provided with a point-shaped bulge, and the surface of the vibration damping rubber 26 with the bulge is connected with the cabin vibration damping seat 23 in a sliding manner.
The damping spring 2 is a compression spring.
The working process of the invention is as follows:
the vibration damping device 2 is fixed on the top of the tower 1, the engine room 3 is fixed on the top of the vibration damping device 2, and meanwhile, the engine room 3 and the engine room vibration damping seat guide post 25 are in limited connection through the guide post nut 10, so that the runaway of the wind driven generator in a limit state is avoided. When the fan vibrates, the vibration can be reduced through the corresponding vibration reduction device 2.
Example 2
As shown in fig. 6:
this embodiment is substantially the same as embodiment 1 in that:
a wind power generator vibration damping device is used for vibration damping between a tower 1 and a machine room 3; the lower end face of the vibration damping device 2 is fixedly connected with the tower 1, and the upper end face of the vibration damping device 2 is fixedly connected with the engine room 3; the vibration damping device 2 comprises a vibration damping base 20 fixedly connected with the top of the tower 1, a vibration damping spring 22 with one end fixedly connected with the vibration damping base 20, and a cabin vibration damping seat 23 fixedly connected with the other end of the vibration damping spring 22; the upper surface of the middle part of the vibration damping base 20 is provided with a spring guide post 27; the upper surface of the vibration damping base 20 is provided with an engine room vibration damping base guide post 25, and the engine room vibration damping base guide posts 25 are arranged on two sides of the spring guide post 27; one end of the cabin vibration damping seat guide pillar 25 is provided with threads, and the upper part of the cabin vibration damping seat guide pillar 25 is provided with a guide pillar nut 10; the cabin damping seat 20 is provided with a guide post hole 231, the guide post hole 231 is slidably connected with the cabin damping seat guide post 25, the guide post nut 10 is used for limiting the cabin damping seat 20, and the cabin damping seat 20 cannot be fixed on the cabin damping seat guide post 25 by the nut 10.
The cabin vibration damping seat 23 is provided with a cabin vibration damping seat mounting hole 230, and the vibration damping base 20 is provided with a vibration damping base mounting hole 200; the tower 3 and the damping base 20 are fastened together through the damping base mounting hole 200 by using a high-strength bolt 12 and a high-strength nut 11; the nacelle 1 and the nacelle damper base 23 are fastened together with high-strength bolts 12 and high-strength nuts 11 through the nacelle damper base mounting holes 230. The middle of the upper surface of the vibration damping base 20 is provided with a hollow guide sleeve, the vibration damping device 2 further comprises vibration damping rubber 26, one surface of the vibration damping rubber 26 is arranged on the inner wall of the hollow guide sleeve, and the other surface of the vibration damping rubber 26 is connected with the cabin vibration damping seat 23 in a sliding mode.
The middle of the upper surface of the vibration damping base 20 is provided with a hollow guide sleeve, the vibration damping device 2 further comprises vibration damping rubber 26, one surface of the vibration damping rubber 26 is arranged on the inner wall of the hollow guide sleeve, and the other surface of the vibration damping rubber 26 is connected with the cabin vibration damping seat 23 in a sliding mode.
One surface of the vibration damping rubber 26 is provided with a point-shaped bulge, the surface, with the bulge, of the vibration damping rubber 26 is connected with the cabin vibration damping seat 23, and the point-shaped bulge is used for increasing the contact area between the vibration damping rubber 26 and the cabin vibration damping seat 23 and increasing the damping coefficient.
The damping spring 2 is a compression spring.
The present embodiment is different from embodiment 1 in that: the lower surface of the vibration damping base 20 is provided with a base vibration damping rubber plate 21, and two surfaces of the base vibration damping rubber plate 21 are provided with point-shaped bulges.
The upper surface of the cabin vibration damping seat 23 is provided with a cabin vibration damping rubber plate 24, and two surfaces of the cabin vibration damping rubber plate 24 are provided with point-shaped bulges.
The vibration of the wind driven generator can be effectively reduced by arranging the vibration reduction rubber plate 21 and the cabin vibration reduction rubber plate 24, and the resistance of the joint is increased, so that the tower 1 and the cabin 3 are more firmly connected with the vibration reduction device 2.
The working principle of the invention is to utilize the principle of spring and rubber damping to reduce vibration, and various friction and other blocking actions for damping free vibration are known as damping. While "special" elements placed on the structural system can provide resistance to movement, a device that dissipates the energy of movement, we refer to as a damper. The damper is also called a damping device. The damping-increasing device is made to quickly damp the vibration generated when the shock is applied.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A wind generator damping device is used for damping vibration between a tower (1) and a machine room (3); the method is characterized in that: the lower end face of the vibration damping device (2) is fixedly connected with the tower (1), and the upper end face of the vibration damping device (2) is fixedly connected with the engine room (3); the vibration damping device (2) comprises a vibration damping base (20) fixedly connected with the top of the tower (1), a vibration damping spring (22) with one end fixedly connected with the vibration damping base (20) and a cabin vibration damping seat (23) fixedly connected with the other end of the vibration damping spring (22); the upper surface of the middle part of the vibration damping base (20) is provided with a spring guide post (27); an engine room vibration damping seat guide post (25) is arranged on the upper surface of the vibration damping base (20), and the engine room vibration damping seat guide posts (25) are arranged on two sides of the spring guide post (27); one end of the cabin vibration damping seat guide post (25) is provided with threads, and the upper part of the cabin vibration damping seat guide post (25) is provided with a guide post nut (10); the cabin damping seat (20) is provided with a guide post hole (231), the guide post hole (231) is in sliding connection with a guide post (25) of the cabin damping seat, and the guide post nut (10) is used for limiting the cabin damping seat (20).
2. The vibration damping device for the wind driven generator according to claim 1, wherein: the vibration reduction device is characterized in that a hollow guide sleeve is arranged in the middle of the upper surface of the vibration reduction base (20), the vibration reduction device (2) further comprises vibration reduction rubber (26) with one surface arranged on the inner wall of the hollow guide sleeve, and the other surface of the vibration reduction rubber (26) is connected with the cabin vibration reduction base (23) in a sliding mode.
3. The vibration damping device for the wind driven generator according to claim 2, wherein: one surface of the vibration damping rubber (26) is provided with a point-shaped bulge, and the surface, provided with the bulge, of the vibration damping rubber (26) is connected with the cabin vibration damping seat (23).
4. The vibration damping device for the wind driven generator according to claim 1, wherein: the damping base is characterized in that a base damping rubber plate (21) is arranged on the lower surface of the damping base (20), and point-shaped bulges are arranged on the upper surface and the lower surface of the base damping rubber plate (21).
5. The vibration damping device for the wind driven generator according to claim 1, wherein: the upper surface of the cabin damping seat (23) is provided with a cabin damping rubber plate (24), and the upper surface and the lower surface of the cabin damping rubber plate (24) are provided with point-shaped bulges.
6. The vibration damping device for the wind driven generator according to claim 1, wherein: the damping spring (2) is a compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110422688.2A CN113217577A (en) | 2021-04-20 | 2021-04-20 | Wind power generation vibration damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110422688.2A CN113217577A (en) | 2021-04-20 | 2021-04-20 | Wind power generation vibration damper |
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| Publication Number | Publication Date |
|---|---|
| CN113217577A true CN113217577A (en) | 2021-08-06 |
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ID=77088142
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110422688.2A Pending CN113217577A (en) | 2021-04-20 | 2021-04-20 | Wind power generation vibration damper |
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| CN (1) | CN113217577A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116696765A (en) * | 2023-06-16 | 2023-09-05 | 无锡史姆斯机械有限公司 | Energy-saving vane pump with overflow valve and processing technology |
| WO2024093024A1 (en) * | 2022-11-02 | 2024-05-10 | 中国华能集团清洁能源技术研究院有限公司 | Vibration damping device for wind-driven generator |
-
2021
- 2021-04-20 CN CN202110422688.2A patent/CN113217577A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024093024A1 (en) * | 2022-11-02 | 2024-05-10 | 中国华能集团清洁能源技术研究院有限公司 | Vibration damping device for wind-driven generator |
| CN116696765A (en) * | 2023-06-16 | 2023-09-05 | 无锡史姆斯机械有限公司 | Energy-saving vane pump with overflow valve and processing technology |
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