CN102032121B - Hydraulic braking system for megawatt fan - Google Patents
Hydraulic braking system for megawatt fan Download PDFInfo
- Publication number
- CN102032121B CN102032121B CN2009101964130A CN200910196413A CN102032121B CN 102032121 B CN102032121 B CN 102032121B CN 2009101964130 A CN2009101964130 A CN 2009101964130A CN 200910196413 A CN200910196413 A CN 200910196413A CN 102032121 B CN102032121 B CN 102032121B
- Authority
- CN
- China
- Prior art keywords
- valve
- brake
- fuel tank
- brake module
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic braking system for a megawatt fan, relates to the technical field of wind power generation and aims to solve the technical problems in the prior art. The system comprises an oil tank, an electric box, a motor pump, a manual pump, two accumulators and a brake module, wherein the motor pump and the manual pump are connected with an oil inlet of the brake module; the motor pump is a main power source and the manual pump is a standby power source; the two accumulators provide auxiliary power for the brake module; and a control oil circuit of the brake module is divided into three paths, namely a first path starts from the oil inlet of the brake module to a spindle brake control interface of the brake module through a group of valves, and is a spindle brake control oil circuit, a second path starts from a secondary accumulator to a spindle brake control interface of the brake module through a group of valves, and is a spindle brake auxiliary control oil circuit, and a third path starts from the oil inlet of the brake module to a yaw brake control interface of the brake module through a group of valves, and is a yaw brake control oil circuit. The provided system can continuously work during power failure.
Description
Technical field
The present invention relates to the technology of wind-power electricity generation, particularly relate to a kind of technology of hydraulic braking sytem of MW class blower fan.
Background technique
The hydraulic braking sytem major function of MW class blower fan is for go off course brake actuating mechanism and main shaft brake actuating mechanism power to be provided.
The hydraulic braking sytem of existing MW class blower fan has following defective: 1) owing to all use the power source of electric-motor pump as brake actuating mechanism; Therefore when system's dead electricity or electric-motor pump break down; Brake actuating mechanism can quit work because of the source of running out of steam, thereby influences the operation of whole blower fan; 2) existing system is in blower fan driftage brake process, and the fuel supply flow rate of control driftage brake and driftage pressure transient, so the stationarity of blower fan driftage brake and reliability is relatively poor, driftage power unit discontinuity impact impaired because of fatigue easily; 3) existing system need to continue to use hydraulic oil, so the working life of electric-motor pump is shorter when blower fan unties the mooring rope; When 4) the main shaft brake actuating mechanism need be braked at a high speed, can make brake slow inadequately, make blower fan impaired easily owing to the power that electric-motor pump provided.
Summary of the invention
To the defective that exists in the above-mentioned existing technology, technical problem to be solved by this invention provides a kind ofly still can be controlled brake actuating mechanism and work on when dead electricity or electric-motor pump break down, and can improve the stationarity and the reliability of blower fan driftage brake; When blower fan unties the mooring rope, also need not to use hydraulic oil, so the working life of electric-motor pump is longer; When the main shaft brake actuating mechanism need be braked at a high speed, the hydraulic braking sytem of the MW class blower fan of enough power can be provided.
In order to solve the problems of the technologies described above, the hydraulic braking sytem of a kind of MW class blower fan provided by the present invention comprises: fuel tank 1, electric box 2, electric-motor pump M1, hand pump M2, main accumulator N1, secondary accumulator N2 and brake module;
In the said fuel tank 1 hydraulic oil is housed; Said brake module is provided with oil inlet P 1, main shaft brake control interface P2 and driftage brake control interface P3;
The filler opening warp one filter G1 of said electric-motor pump M1 inserts fuel tank 1 and immerses in the hydraulic oil, and its oil outlet connects the oil inlet P 1 of brake module successively through a filter-press G5, an one-way valve D5;
The filler opening of said hand pump M2 inserts fuel tank 1 and immerses in the hydraulic oil oil inlet P 1 of its oil outlet warp one one-way valve D6 connection brake module through a filter G2;
Said main accumulator N1 connects the oil inlet P 1 of brake module;
The control oil channel of said brake module is divided into three the tunnel; The first via is connected to said main shaft brake control interface P2 through an one-way valve D1, a reduction valve Y1, an one-way valve D2, a throttle valve J1, a solenoid valve H1, a throttle valve J2 successively by 1 of the oil inlet P of brake module; The secondary accumulator N2 of secondary route rises successively and is connected to said main shaft brake control interface P2 through a stop valve Z1, a solenoid valve H2, a throttle valve J2; Third Road is by 1 of the oil inlet P of brake module; Be connected to the filler opening of a two-position three way magnetic valve H3 successively through an one-way valve D3, a throttle valve J3; The oil drain out of this two-position three way magnetic valve H3 connects fuel tank 1 through a relief valve Y2, an one-way valve D4 successively; Its oil outlet is connected to said driftage brake control interface P3 through a filter G3 respectively, connects fuel tank 1 through a stop valve Z2, an one-way valve D4; Said driftage brake control interface P3 connects fuel tank 1 through a filter G4, an electromagnetic relief valve H4, an one-way valve D4;
The filler opening of said brake module is connected to the relief valve Y3 that is used for system overload control respectively, is used to control the electronic pressure sensor B1 that electric-motor pump M1 starts and stops, and through an one-way valve D1 auxiliary connection accumulator N2; Said secondary accumulator N2 connects fuel tank 1 through a relief valve Y4; Said electronic pressure sensor B1 is electrically connected the enable switch of said electric-motor pump M1; Said electric box 2 is electrically connected each parts;
Said solenoid valve H1, H2 and two position three-way valve H3 are the valve that dead electricity is communicated with, and said electromagnetic relief valve H4 is the valve that dead electricity is turn-offed.
Further; Said main shaft brake control interface P2 is connected to electronic pressure switch K1; Said electronic pressure switch K1 is provided with upper limit pressure contact and the upper limit pressure contact that is triggered by the upper and lower force value respectively, and is electrically connected the enable switch of said electric-motor pump M1 through two pressure contacts.
Further, be provided with the thermometer B2 and the level meter B3 that is used to measure oil tank liquid level that are used to measure the oil temperature in the said fuel tank 1, be provided with the empty filter G6 that is used to prevent the dust entering and keeps fuel tank 1 inside and outside atmospheric pressure balance in the upper end of fuel tank 1.
The hydraulic braking sytem of MW class blower fan provided by the invention has following beneficial effect:
1) owing to uses electric-motor pump as the brake actuating mechanism main power source; Use the back-up power source of hand pump as brake actuating mechanism; Therefore when system's dead electricity or electric-motor pump break down; Can use hand pump to continue as brake actuating mechanism power is provided, brake actuating mechanism can be worked on, can therefore not influence the operation of whole blower fan;
2) in blower fan driftage brake process; Adopting the fuel supply flow rate of throttle valve control driftage brake is small constant current amount; High oil pressure in the time of guaranteeing to go off course brake in the driftage brake actuating mechanism can remain on to be set below the oil pressure value; The driftage brake that makes the MW class blower fan steadily, the driftage power unit is stressed evenly, can not impact impaired because of fatigue; In addition, also control the back pressure of driftage brake actuating mechanism, therefore can keep the driftage of the driftage brake actuating mechanism of MW class blower fan to stablize through relief valve;
3) owing in the 3rd control oil channel of brake module, be provided with electromagnetic relief valve; Through control two-position three way valve breakdown; Control electromagnetic relief valve simultaneously and be communicated with, can make hydraulic oil in the driftage brake actuating mechanism through the electromagnetic relief valve pressure release, and then the MW class blower fan is untied the mooring rope smoothly; The whole process hydraulic system of untying the mooring rope need not can prolong the electric-motor pump life-span with oil;
4) owing in system, adopted two accumulators, when the main shaft brake actuating mechanism need be braked at a high speed, two accumulators provided auxiliary power guaranteeing the correct execution of brake when can be at the power that electric-motor pump provided not enough, thereby ensure the safety of blower fan.
Description of drawings
Fig. 1 is the hydraulic diagram of hydraulic braking sytem of the MW class blower fan of the embodiment of the invention;
Fig. 2 is the structural representation of hydraulic braking sytem of the MW class blower fan of the embodiment of the invention.
Embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
Like Fig. 1-shown in Figure 2, the hydraulic braking sytem of a kind of MW class blower fan that the embodiment of the invention provided comprises: fuel tank 1, electric box 2, electric-motor pump M1, hand pump M2, main accumulator N1, secondary accumulator N2 and brake module;
In the said fuel tank 1 hydraulic oil is housed; Said brake module is provided with oil inlet P 1, main shaft brake control interface P2 and driftage brake control interface P3;
The filler opening warp one filter G1 of said electric-motor pump M1 inserts fuel tank 1 and immerses in the hydraulic oil, and its oil outlet connects the oil inlet P 1 of brake module successively through a filter-press G5, an one-way valve D5;
The filler opening of said hand pump M2 inserts fuel tank 1 and immerses in the hydraulic oil oil inlet P 1 of its oil outlet warp one one-way valve D6 connection brake module through a filter G2;
Said main accumulator N1 connects the oil inlet P 1 of brake module;
The control oil channel of said brake module is divided into three the tunnel; The first via is connected to said main shaft brake control interface P2 through an one-way valve D1, a reduction valve Y1, an one-way valve D2, a throttle valve J1, a solenoid valve H1, a throttle valve J2 successively by 1 of the oil inlet P of brake module; The secondary accumulator N2 of secondary route rises successively and is connected to said main shaft brake control interface P2 through a stop valve Z1, a solenoid valve H2, a throttle valve J2; Third Road is by 1 of the oil inlet P of brake module; Be connected to the filler opening of a two-position three way magnetic valve H3 successively through an one-way valve D3, a throttle valve J3; The oil drain out of this two-position three way magnetic valve H3 connects fuel tank 1 through a relief valve Y2, an one-way valve D4 successively; Its oil outlet is connected to said driftage brake control interface P3 through a filter G3 respectively, connects fuel tank 1 through a stop valve Z2, an one-way valve D4; Said driftage brake control interface P3 connects fuel tank 1 through a filter G4, an electromagnetic relief valve H4, an one-way valve D4;
The filler opening of said brake module is connected to the relief valve Y3 that is used for system overload control respectively, is used to control the electronic pressure sensor B1 that electric-motor pump M1 starts and stops; And through an one-way valve D1 auxiliary connection accumulator N2, said secondary accumulator N2 connects fuel tank 1 through a relief valve Y4; Said electronic pressure sensor B1 is electrically connected the enable switch of said electric-motor pump M1; Said electric box 2 is electrically connected each parts;
Said solenoid valve H1, H2 and two position three-way valve H3 are the valve that dead electricity is communicated with, and said electromagnetic relief valve H4 is the valve that dead electricity is turn-offed;
Said main shaft brake control interface P2 is connected to electronic pressure switch K1; Said electronic pressure switch K1 is provided with upper limit pressure contact and the upper limit pressure contact that is triggered by the upper and lower force value respectively, and is electrically connected the enable switch of said electric-motor pump M1 through two pressure contacts;
Be provided with the thermometer B2 and the level meter B3 that is used to measure oil tank liquid level that are used to measure the oil temperature in the said fuel tank 1, be provided with the empty filter G6 that is used to prevent the dust entering and keeps fuel tank 1 inside and outside atmospheric pressure balance in the upper end of fuel tank 1.
In the embodiment of the invention, said fuel tank 1 adopts the metallic aluminium cast inblock with excellent heat dispersion performance to form, and its volume is 16L.
The embodiment of the invention is when fuel tank 1 oiling, through the injection amount of level meter B3 control hydraulic oil, in order to avoid hydraulic oil too much overflows because of annotating or because of the very few electric-motor pump that damages of annotating.
When the embodiment of the invention is installed on the MW class blower fan, the main shaft brake actuating mechanism of MW class blower fan is connected to the main shaft brake control interface P2 of brake module, with the driftage brake actuating mechanism of the MW class blower fan brake control interface P3 that is connected to and goes off course; Electric box is connected to the electric control box of MW class blower fan.
Under the embodiment of the invention normal working, from fuel tank 1, extract hydraulic oil by electric-motor pump M1 and fill ability, reach oil inlet P 1 fuel feeding, and fill ability to secondary accumulator N2 through the oil inlet P 1 of brake module to brake module to main accumulator N1; It can the back be the brake module repairing as auxiliary power source that main accumulator N1 fills;
When the oil pressure that detects the oil inlet P 1 of brake module as electronic pressure sensor B1 is higher than normal value, control electric-motor pump M2 fuel cut-off; When the oil pressure that detects the oil inlet P 1 of brake module as electronic pressure sensor B1 was lower than normal value, control electric-motor pump M2 started fuel feeding;
When the oil pressure that detects the main shaft brake control interface P2 of brake module as electronic pressure switch K1 is higher than normal value (when being higher than its upper limit force value), promptly triggers its upper limit pressure contact and send stop signal, make electric-motor pump M2 fuel cut-off to electric-motor pump M2; When the oil pressure that detects the main shaft brake control interface P2 of brake module as electronic pressure switch K1 is lower than normal value (when being lower than its threshold pression value), promptly triggers its threshold pression contact and send actuating signal, make electric-motor pump M2 start fuel feeding to electric-motor pump M2;
When system's dead electricity or electric-motor pump M1 break down, to launch hand pump M2 and from fuel tank 1, extract oil inlet P 1 fuel feeding of hydraulic oil to brake module, be the repairing of main shaft brake system by secondary accumulator N2 as auxiliary power source this moment;
First, second control oil channel of brake module is used to control the main shaft brake actuating mechanism work of MW class blower fan; When solenoid valve H1 and H2 dead electricity connection simultaneously, the control oil channel of main shaft brake actuating mechanism is connected, and this moment, system provided high pressure oil to the main shaft brake actuating mechanism, made the brake of main shaft brake actuating mechanism pressurized; When solenoid valve H1 and H2 simultaneously during electric shutoff, the control oil channel of main shaft brake actuating mechanism is turned off, and main shaft brake actuating mechanism decompression pine is stopped;
The 3rd control oil channel of brake module is used to control the driftage brake actuating mechanism work of MW class blower fan; When two position three-way valve H3 dead electricity is communicated with; And electromagnetic relief valve H4 dead electricity is when turn-offing, and the control oil channel of driftage brake actuating mechanism is connected, and its pressure release oil circuit turn-offs; This moment, system provided high pressure oil to the driftage brake actuating mechanism, made the brake of driftage brake actuating mechanism pressurized; When two position three-way valve H3 gets electric shutoff; And electromagnetic relief valve H4 dead electricity is when turn-offing, and the control oil channel of driftage brake actuating mechanism is cut off, and its pressure release oil circuit turn-offs; Driftage brake actuating mechanism decompression pine is stopped; Oil drain out and the relief valve Y2 of high pressure oil through two position three-way valve H3 that goes off course this moment in the brake actuating mechanism maintains 4.5Mpa to oil pressure, thereby controls the back pressure of driftage brake actuating mechanism, and be stable with the driftage of the driftage brake actuating mechanism that keeps the MW class blower fan; When two position three-way valve H3 gets electric shutoff; And electromagnetic relief valve H4 is when getting electric connection, and the hydraulic oil in the driftage brake actuating mechanism unties the mooring rope the MW class blower fan through electromagnetic relief valve H4, one-way valve D4 pressure release smoothly; The whole process hydraulic system of untying the mooring rope need not can prolong the electric-motor pump life-span with oil;
The fuel supply flow rate that throttle valve J3 in the 3rd control oil channel of brake module is used to control the driftage brake is the small constant current amount of 0.4L/min; High oil pressure when braking to guarantee to go off course in the driftage brake actuating mechanism can remain on to be set below the oil pressure value 16Mpa; The driftage brake that makes the MW class blower fan steadily, the driftage power unit is stressed evenly, can not impact impaired because of fatigue.
Claims (3)
1. the hydraulic braking sytem of a MW class blower fan comprises: fuel tank (1), electric box (2), electric-motor pump (M1), hand pump (M2), main accumulator (N1), secondary accumulator (N2) and brake module;
Said fuel tank is equipped with hydraulic oil in (1); Said brake module is provided with filler opening (P1), main shaft brake control interface (P2) and driftage brake control interface (P3);
Filler opening warp one filter (G1) of said electric-motor pump (M1) inserts fuel tank (1) and immerses in the hydraulic oil, and its oil outlet connects the filler opening (P1) of brake module successively through a filter-press (G5), an one-way valve (D5);
The filler opening of said hand pump (M2) inserts fuel tank (1) and immerses in the hydraulic oil filler opening (P1) of its oil outlet warp one one-way valve (D6) connection brake module through a filter (G2);
Said main accumulator (N1) connects the filler opening (P1) of brake module;
The control oil channel of said brake module is divided into three the tunnel; The first via is risen by the filler opening (P1) of brake module, is connected to said main shaft brake control interface (P2) through an one-way valve (D1), a reduction valve (Y1), an one-way valve (D2), a throttle valve (J1), a solenoid valve (H1), a throttle valve (J2) successively; The secondary accumulator of secondary route (N2) rises successively and is connected to said main shaft brake control interface (P2) through a stop valve (Z1), a solenoid valve (H2), a throttle valve (J2); Third Road is risen by the filler opening (P1) of brake module; Be connected to the filler opening of a two-position three way magnetic valve (H3) successively through an one-way valve (D3), a throttle valve (J3); The oil drain out of this two-position three way magnetic valve (H3) connects fuel tank (1) through a relief valve (Y2), an one-way valve (D4) successively; Its oil outlet is connected to said driftage brake control interface (P3) through a filter (G3) respectively, connects fuel tank (1) through a stop valve (Z2), an one-way valve (D4); Said driftage brake control interface (P3) connects fuel tank (1) through a filter (G4), an electromagnetic relief valve (H4), an one-way valve (D4);
The filler opening of said brake module is connected to the relief valve (Y3) that is used for system overload control respectively, is used to control the electronic pressure sensor (B1) that electric-motor pump (M1) starts and stops, and through an one-way valve (D1) auxiliary connection accumulator (N2); Said secondary accumulator (N2) connects fuel tank (1) through a relief valve (Y4); Said electronic pressure sensor (B1) is electrically connected the enable switch of said electric-motor pump (M1); Said electric box (2) is electrically connected each parts;
Said solenoid valve (H1, H2) and two position three-way valve (H3) are the valve that dead electricity is communicated with, the valve that said electromagnetic relief valve (H4) turn-offs for dead electricity.
2. the hydraulic braking sytem of MW class blower fan according to claim 1; It is characterized in that: said main shaft brake control interface (P2) is connected to electronic pressure switch (K1); Said electronic pressure switch (K1) is provided with two pressure contacts that triggered by the upper and lower force value respectively, and is electrically connected the enable switch of said electric-motor pump (M1) through two pressure contacts.
3. the hydraulic braking sytem of MW class blower fan according to claim 1; It is characterized in that: be provided with the level meter (B3) that is used to measure the thermometer (B2) of oil temperature and is used to measure oil tank liquid level in the said fuel tank (1), be provided with the empty filter (G6) that is used to prevent the dust entering and keeps the inside and outside atmospheric pressure balance of fuel tank (1) in the upper end of fuel tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101964130A CN102032121B (en) | 2009-09-25 | 2009-09-25 | Hydraulic braking system for megawatt fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101964130A CN102032121B (en) | 2009-09-25 | 2009-09-25 | Hydraulic braking system for megawatt fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102032121A CN102032121A (en) | 2011-04-27 |
| CN102032121B true CN102032121B (en) | 2012-12-26 |
Family
ID=43885443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101964130A Expired - Fee Related CN102032121B (en) | 2009-09-25 | 2009-09-25 | Hydraulic braking system for megawatt fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102032121B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6177562B2 (en) * | 2013-03-28 | 2017-08-09 | 三菱日立パワーシステムズ株式会社 | Hydraulic device and prime mover |
| CN103629278B (en) * | 2013-11-21 | 2016-03-30 | 北京金风科创风电设备有限公司 | Locking hydraulic system of wind driven generator |
| CN106677983B (en) * | 2016-12-29 | 2019-02-15 | 科诺伟业风能设备（北京）有限公司 | A kind of Yaw control method that wind power generating set is Anti-Typhoon |
| CN106763314A (en) * | 2017-01-05 | 2017-05-31 | 中国神华能源股份有限公司 | Brake apparatus and brake fluid system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004057522A1 (en) * | 2004-10-08 | 2006-04-13 | Bosch Rexroth Aktiengesellschaft | Braking device for wind power plant has 3/2-path seat valve, via which pressure cavity can be connected to pressure fluid source and tank vent to operate brakes |
| CN101033733A (en) * | 2007-04-11 | 2007-09-12 | 浙江大学 | Large and middle wind turbine digital intelligent hydraulic brake system |
| CN201246284Y (en) * | 2008-08-29 | 2009-05-27 | 江苏苏亚机电制造有限公司 | Flexible brake system of wind generating set |
| CN201258825Y (en) * | 2008-09-09 | 2009-06-17 | 上海汇益液压控制系统工程有限公司 | Hydraulic control module of wind power generation system |
| CN201636092U (en) * | 2009-09-25 | 2010-11-17 | 上海汇益控制系统股份有限公司 | Hydraulic braking system of megawatt fan |
-
2009
- 2009-09-25 CN CN2009101964130A patent/CN102032121B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004057522A1 (en) * | 2004-10-08 | 2006-04-13 | Bosch Rexroth Aktiengesellschaft | Braking device for wind power plant has 3/2-path seat valve, via which pressure cavity can be connected to pressure fluid source and tank vent to operate brakes |
| CN101033733A (en) * | 2007-04-11 | 2007-09-12 | 浙江大学 | Large and middle wind turbine digital intelligent hydraulic brake system |
| CN201246284Y (en) * | 2008-08-29 | 2009-05-27 | 江苏苏亚机电制造有限公司 | Flexible brake system of wind generating set |
| CN201258825Y (en) * | 2008-09-09 | 2009-06-17 | 上海汇益液压控制系统工程有限公司 | Hydraulic control module of wind power generation system |
| CN201636092U (en) * | 2009-09-25 | 2010-11-17 | 上海汇益控制系统股份有限公司 | Hydraulic braking system of megawatt fan |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-307653A 2006.11.09 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102032121A (en) | 2011-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201636092U (en) | Hydraulic braking system of megawatt fan | |
| CN101809837B (en) | Aerogenerator device | |
| CN102032121B (en) | Hydraulic braking system for megawatt fan | |
| WO2021114943A1 (en) | Yaw braking system of wind power generator set, and control method therefor | |
| CN101979870A (en) | Wind power generation hydraulic system | |
| CN109027063B (en) | Variable-pressure yaw brake hydraulic system of wind generating set and control method thereof | |
| CN102493916B (en) | Off-course hydraulic braking device of wind generating set | |
| CN105059281A (en) | Equalization module and control method of locomotive brake | |
| CN204140961U (en) | Water power plant compound seal electric hand moves water intake ball valve | |
| CN201858082U (en) | Wind power generation hydraulic system | |
| CN107701372A (en) | A kind of wind power generating set self-protection control method become under oar Actuators Failures | |
| CN205345348U (en) | Aircraft safety and energy -conserving dual -purpose system with ram air turbine | |
| CN102116256A (en) | Safe pressurizer of wind power generation hydraulic system | |
| CN203305987U (en) | Construction machinery brake pedal | |
| CN110056587A (en) | A kind of dual fail-safe fast braking hydraulic circuit based on marine tidal-current energy generator group | |
| CN201858081U (en) | Safety pressure-retaining device of wind power generation hydraulic system | |
| CN202645846U (en) | Energy-saving type braking hydraulic system for wind generating set | |
| CN201982386U (en) | Novel dwell hydraulic station for disc brake | |
| CN203098966U (en) | Pressure-regulating type hydraulic-control one-way valve applied to water-supply pressure storage tank | |
| CN209370181U (en) | Hydraulic control system in wind power equipment | |
| CN102778847B (en) | Automatic shutdown method of electric towing turbine unit in failure of controlling system and oil system | |
| CN220229092U (en) | Electric boiler energy supply system with power-off protection function | |
| CN103195650B (en) | Control method of gearbox high-speed shaft brake after power outage of wind generation set | |
| CN205618452U (en) | Impulse turbine speed adjusting device with leather bag energy storage ware | |
| CN201747512U (en) | Multi-water-turbine water inlet ball valve hydraulic station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20180925 |