CN114109927A - Hydraulic variable pitch system for proportional servo control of wind driven generator - Google Patents
Hydraulic variable pitch system for proportional servo control of wind driven generator Download PDFInfo
- Publication number
- CN114109927A CN114109927A CN202110157658.3A CN202110157658A CN114109927A CN 114109927 A CN114109927 A CN 114109927A CN 202110157658 A CN202110157658 A CN 202110157658A CN 114109927 A CN114109927 A CN 114109927A
- Authority
- CN
- China
- Prior art keywords
- valve
- port
- inlet
- outlet
- proportional servo
- 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.)
- Pending
Links
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 3
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical group [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 claims description 2
- 230000008676 import Effects 0.000 abstract 3
- 239000003921 oil Substances 0.000 description 39
- 239000010720 hydraulic oil Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000007175 bidirectional communication Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
-
- 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
- F03D7/00—Controlling wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/022—Installations or systems with accumulators used as an emergency power source, e.g. in case of pump failure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/002—Electrical failure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
-
- 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
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a hydraulic variable pitch system for proportional servo control of a wind driven generator, which comprises: the hydraulic cylinder, the valve block, and the proportional servo valve, the first electromagnetic valve, the first check valve and the second check valve which are arranged on the valve block. The valve block is provided with an oil inlet and an oil return port. The proportional servo valve is a three-position four-way valve and is provided with a port P, a port T, a port A and a port B, the port P is communicated with the oil inlet, and the port T is communicated with the oil return port. The first solenoid valve is two-position two-way valve, and the first solenoid valve has first import and first export, and first import is connected first exit linkage in the one end of pneumatic cylinder with A mouthful, and the import of first check valve is connected with B mouthful, and the export of first check valve is connected with the other end of pneumatic cylinder. The inlet of the second one-way valve is connected with the outlet of the first one-way valve, and the outlet of the second one-way valve is connected with the oil inlet. The system can realize the functions of feathering, feathering and the like of the wind power blade, and improves the application range and the reliability of the pitch control system.
Description
Technical Field
The invention relates to a hydraulic variable pitch system controlled by a wind driven generator in a proportional servo mode.
Background
With the development and upgrade of the wind power generation industry, large megawatt wind power generators are continuously developed at home and abroad in recent years. In order to improve the operation efficiency of the wind power blade, a driving device is generally required to control the pitch of the wind power blade, namely, the functions of normal feathering, normal feathering stop, normal blade opening stop and the like of the wind power blade are realized. The traditional mode is to adopt a motor system to realize pitch control, but the traditional mode still has its inherent shortcoming, and the concrete is as follows: firstly, the wind power generator is only suitable for small and medium power wind power generators; secondly, the dynamic characteristic is relatively poor, and the inertia is large; thirdly, if the blades are continuously and frequently adjusted, the motor generates excessive heat load and is easy to damage, so that the application range is limited, and the reliability is problematic.
Disclosure of Invention
The invention aims to overcome the defects of small application range and poor reliability of a variable pitch system of a wind power blade in the prior art, and provides a hydraulic variable pitch system for proportional servo control of a wind driven generator, which can solve the problems.
The invention solves the technical problems through the following technical scheme:
the utility model provides a hydraulic pressure of aerogenerator proportion servo control becomes oar system which characterized in that, it includes:
the valve block is provided with an oil inlet and an oil return port;
the proportional servo valve is a three-position four-way valve and is provided with a port P, a port T, a port A and a port B, the port P is communicated with the oil inlet, the port T is communicated with the oil return port, and when the proportional servo valve is powered off, the port P, the port T, the port A and the port B are all disconnected; when the proportional servo valve is electrified at the left position, the port P is communicated with the port B, and the port A is communicated with the port T; when the right position of the proportional servo valve is electrified, the port P is communicated with the port A, and the port B is communicated with the port T;
the first electromagnetic valve is arranged on the valve block, the first electromagnetic valve is a two-position two-way valve, the first electromagnetic valve is provided with a first inlet and a first outlet, the first inlet is connected with the port A, when the first electromagnetic valve is powered off, the first inlet is communicated with the first outlet in a one-way mode, and when the first electromagnetic valve is powered on, the first inlet is communicated with the first outlet in a two-way mode;
the first outlet is connected to one end of the hydraulic cylinder;
the first one-way valve is arranged on the valve block, an inlet of the first one-way valve is connected with the port B, and an outlet of the first one-way valve is connected with the other end of the hydraulic cylinder;
the second one-way valve is installed on the valve block, an inlet of the second one-way valve is connected with an outlet of the first one-way valve, and an outlet of the second one-way valve is connected with the oil inlet.
Preferably, the hydraulic variable pitch system controlled by the wind driven generator proportional servo further comprises a second electromagnetic valve, the second electromagnetic valve is installed on the valve block and is a two-position two-way valve, the second electromagnetic valve is installed on a pipeline between the proportional servo valve and the oil inlet, the second electromagnetic valve is provided with a second inlet and a second outlet, the second outlet is connected with the oil inlet, the second inlet is connected with the port P, when the second electromagnetic valve is powered off, the second inlet is communicated with the second outlet in a one-way mode, and when the second electromagnetic valve is powered on, the second inlet is communicated with the second outlet in a two-way mode.
Preferably, the hydraulic pitch control system based on proportional servo control of the wind turbine further includes a third electromagnetic valve and a third one-way valve, the third electromagnetic valve and the third one-way valve are installed on the valve block, the third electromagnetic valve is a two-position two-way valve, the third electromagnetic valve has a third inlet and a third outlet, the third outlet is connected to the oil inlet, the third inlet is connected to an inlet of the third one-way valve, when the third electromagnetic valve is powered off, the third outlet is bidirectionally communicated to the third inlet, when the third electromagnetic valve is powered on, the third inlet is unidirectionally communicated to the third outlet, and an outlet of the third one-way valve is connected to a pipeline between the first electromagnetic valve and the hydraulic cylinder.
Preferably, the hydraulic pitch system controlled by the wind driven generator in the proportional servo mode further comprises a pressure sensor, and the pressure sensor is mounted on a pipeline between the first electromagnetic valve and the hydraulic cylinder.
Preferably, the valve block is made of nodular cast iron.
Preferably, the outer surface of the valve block is treated with zinc-nickel plating.
Preferably, a pipeline of the hydraulic pitch control system controlled by the wind driven generator proportional servo is connected with a plurality of pressure measuring joints.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the system can realize functions of feathering, feathering stop, feathering opening stop and the like of the wind power blade, and improves the application range and reliability of the pitch control system.
Drawings
FIG. 1 is a hydraulic schematic diagram of a hydraulic pitch system for proportional servo control of a wind turbine in a preferred embodiment of the present invention.
Description of reference numerals:
P port 210
A port 230
Third inlet 331
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Fig. 1 shows a hydraulic pitch system for proportional servo control of a wind turbine, comprising: hydraulic cylinder 400, a valve block (not shown), and proportional servo valve 200, first solenoid valve 310, first check valve 510, and second check valve 520 mounted on the valve block. The valve block has an oil inlet 110 and an oil return 120. The proportional servo valve 200 is a three-position four-way valve, the proportional servo valve 200 has a port P210, a port T220, a port a 230 and a port B240, the port P210 is communicated with the oil inlet 110, and the port T220 is communicated with the oil return port 120. When the proportional servo valve 200 is powered off, the port P210, the port T220, the port A230 and the port B240 are all disconnected; when the proportional servo valve 200 is electrified at the left position, the port P210 is communicated with the port B240, and the port A230 is communicated with the port T220; when the proportional servo valve 200 is energized to the right, the port P210 communicates with the port A230, and the port B240 communicates with the port T220. The first solenoid valve 310 is a two-position two-way valve, the first solenoid valve 310 has a first inlet 311 and a first outlet 312, and the first inlet 311 is connected to the port a 230. When the first electromagnetic valve 310 is de-energized, the first inlet 311 is communicated with the first outlet 312 in a one-way mode; when the first solenoid valve 310 is energized, the first inlet 311 is in bidirectional communication with the first outlet 312. The first outlet 312 is connected to one end of the cylinder 400, the inlet of the first check valve 510 is connected to the B port 240, and the outlet of the first check valve 510 is connected to the other end of the cylinder 400. An inlet of the second check valve 520 is connected to an outlet of the first check valve 510, and an outlet of the second check valve 520 is connected to the oil inlet 110.
The device can realize functions of feathering, feathering stop, feathering opening stop and the like of the wind power blade.
Normal feathering: the first solenoid valve 310 is de-energized, and the proportional servo valve 200 is de-energized at the left position and is energized at the right position for reversing. At this time, the high-pressure oil in the oil inlet 110 enters the rodless cavity of the hydraulic cylinder 400 through the port P210, the port a 230, the first inlet 311 of the first solenoid valve 310, and the first outlet 312; the hydraulic oil in the rod chamber of the hydraulic cylinder 400 is merged with the high-pressure oil in the oil inlet 110 through the second check valve 520, and then reenters the hydraulic cylinder 400. It should be noted that the valve core of the proportional servo valve 200 is provided with a choke, and when high-pressure oil passes through the choke, the choke has a steady flow effect on the oil, so that the piston rod of the hydraulic cylinder 400 stably extends at a normal speed, thereby realizing normal feathering of the blade.
Normal feathering stops: when the first electromagnetic valve 310 is powered off and the proportional servo valve 200 is powered off, two ends of the hydraulic cylinder 400 are separated by the proportional servo valve 200, so that high-pressure oil cannot enter the hydraulic cylinder 400, a piston rod in the hydraulic cylinder 400 cannot move, and a blade cannot pitch.
Normally open oar: the first electromagnetic valve 310 is powered on for reversing, the proportional servo valve 200 is powered on at the left position and powered off at the right position for reversing, at this time, high-pressure oil in the oil inlet 110 passes through the port P210 and the port B240, then passes through the first check valve 510 and enters the rod cavity of the hydraulic cylinder 400, so that the piston rod of the hydraulic cylinder 400 retracts, and the paddle opening is further realized. Meanwhile, the hydraulic oil in the rodless chamber of the hydraulic cylinder 400 flows back to the oil return port 120 through the first solenoid valve 310 and the left position of the proportional servo valve 200.
Stopping and keeping the normally open paddle: the first electromagnetic valve 310 is reset when power is lost, and the left position and the right position of the proportional servo valve 200 are all reset when power is lost and are in the middle position. At this time, the high pressure oil cannot enter the hydraulic cylinder 400, and the oil and pressure in the left and right chambers of the hydraulic cylinder 400 are maintained by the first solenoid valve 310 and the first check valve 510.
The core element of the system is a proportional servo valve 200, the control voltage of the proportional servo valve 200 is proportional to the displacement variation of the piston rod of a hydraulic cylinder 400 for controlling the blade angle, and the position of the hydraulic cylinder 400 is closed-loop controlled by PID adjustment by detecting the displacement of the piston rod of the hydraulic cylinder 400. In order to improve the feathering speed, the proportional servo control hydraulic pitch control system not only introduces a differential circuit, but also can utilize an energy accumulator to maintain the pressure of the system. When the system is in failure and power failure and is shut down emergently, the power supply is immediately cut off, the hydraulic pump is shut down emergently, and the energy accumulator provides oil pressure to enable the blades to feather. The proportional servo control hydraulic variable pitch system has outstanding advantages in the aspect of controlling the variable pitch of the blades of the high-power wind driven generator and is high in reliability.
In this scheme, in order to improve the safety and reliability of the system, the hydraulic pitch control system of the wind driven generator proportional servo control further includes a second electromagnetic valve 320, the second electromagnetic valve 320 is installed on the valve block, and the second electromagnetic valve 320 is a two-position two-way valve. The second solenoid valve 320 is installed on a pipeline between the proportional servo valve 200 and the oil inlet 110, the second solenoid valve 320 has a second inlet 321 and a second outlet 322, the second outlet 322 is connected with the oil inlet 110, and the second inlet 321 is connected with the port P210. When the second electromagnetic valve 320 is de-energized, the second inlet 321 is communicated with the second outlet 322 in a one-way mode; when the second solenoid valve 320 is energized, the second inlet 321 is in bidirectional communication with the second outlet 322. During normal feathering and normal feathering, the second solenoid valve 320 is powered on, and high-pressure oil enters the proportional servo valve 200 through the second outlet 322 and the second inlet 321 of the second solenoid valve 320. When feathering stops and is kept, the second electromagnetic valve 320 is de-energized, and high-pressure oil cannot enter the proportional servo valve 200. The second electromagnetic valve 320 can improve the reliability of the system, and avoid misoperation of the system when the proportional servo valve 200 is in disorder.
In addition, according to actual needs, the variable pitch system also needs to have an emergency feathering function, in the scheme, the hydraulic variable pitch system for the proportional servo control of the wind driven generator further comprises a third electromagnetic valve 330 and a third one-way valve 530, and the third electromagnetic valve 330 and the third one-way valve 530 are installed on the valve block. The third electromagnetic valve 330 is a two-position two-way valve, the third electromagnetic valve 330 has a third inlet 331 and a third outlet 332, the third outlet 332 is connected to the oil inlet 110, and the third inlet 331 is connected to an inlet of the third one-way valve 530. When the third electromagnetic valve 330 is de-energized, the third outlet 332 is communicated with the third inlet 331 in a bidirectional way; when the third solenoid valve 330 is energized, the third inlet 331 is in one-way communication with the third outlet 332. The outlet of the third check valve 530 is connected to a line between the first solenoid valve 310 and the hydraulic cylinder 400.
When emergency feathering is needed, the first electromagnetic valve 310, the second electromagnetic valve 320 and the third electromagnetic valve 330 are powered off, the left position and the right position of the proportional servo valve 200 are powered off, and at the moment, high-pressure oil in the oil inlet 110 enters a rodless cavity of the hydraulic cylinder 400 through the third electromagnetic valve 330 and the third check valve 530; meanwhile, the hydraulic oil in the rod cavity of the hydraulic cylinder 400 flows back through the second check valve 520, merges with the high-pressure oil in the oil inlet 110, enters the hydraulic cylinder 400 again, and enters the rodless cavity of the hydraulic cylinder 400 again, so that the extension of the piston rod of the hydraulic cylinder 400 is accelerated, and the rapid emergency feathering is realized.
In order to accurately control the feathering and the feathering speed, the hydraulic pitch control system controlled by the wind driven generator proportional servo further comprises a pressure sensor 600, and the pressure sensor 600 is installed on a pipeline between the first electromagnetic valve 310 and the hydraulic cylinder 400. That is, the pressure sensor 600 may monitor the pressure change of the rodless cavity of the hydraulic cylinder 400 on line, and proportionally control the opening of the valve port of the proportional servo valve 200 through an electrical system, thereby controlling the speed of the oil entering the rodless cavity of the hydraulic cylinder 400, and further controlling the required feathering speed of the blade.
In the scheme, the valve block is made of nodular cast iron. The outer surface of the valve block is galvanized nickel. In addition, hydraulic elements on the valve block are all installed on the valve block in a threaded connection mode.
In addition, a plurality of pressure measuring joints 700 are connected to a pipeline of a hydraulic variable pitch system controlled by the wind driven generator proportional servo, so that the oil pressure of each part of the system is detected in real time, and the safety of the system is improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (7)
1. The utility model provides a hydraulic pressure of aerogenerator proportion servo control becomes oar system which characterized in that, it includes:
the valve block is provided with an oil inlet and an oil return port;
the proportional servo valve is a three-position four-way valve and is provided with a port P, a port T, a port A and a port B, the port P is communicated with the oil inlet, the port T is communicated with the oil return port, and when the proportional servo valve is powered off, the port P, the port T, the port A and the port B are all disconnected; when the proportional servo valve is electrified at the left position, the port P is communicated with the port B, and the port A is communicated with the port T; when the right position of the proportional servo valve is electrified, the port P is communicated with the port A, and the port B is communicated with the port T;
the first electromagnetic valve is arranged on the valve block, the first electromagnetic valve is a two-position two-way valve, the first electromagnetic valve is provided with a first inlet and a first outlet, the first inlet is connected with the port A, when the first electromagnetic valve is powered off, the first inlet is communicated with the first outlet in a one-way mode, and when the first electromagnetic valve is powered on, the first inlet is communicated with the first outlet in a two-way mode;
the first outlet is connected to one end of the hydraulic cylinder;
the first one-way valve is arranged on the valve block, an inlet of the first one-way valve is connected with the port B, and an outlet of the first one-way valve is connected with the other end of the hydraulic cylinder;
the second one-way valve is installed on the valve block, an inlet of the second one-way valve is connected with an outlet of the first one-way valve, and an outlet of the second one-way valve is connected with the oil inlet.
2. The hydraulic pitch system controlled by the proportional servo of the wind driven generator according to claim 1, further comprising a second electromagnetic valve, wherein the second electromagnetic valve is installed on the valve block, the second electromagnetic valve is a two-position two-way valve, the second electromagnetic valve is installed on a pipeline between the proportional servo valve and the oil inlet, the second electromagnetic valve has a second inlet and a second outlet, the second outlet is connected with the oil inlet, the second inlet is connected with the port P, when the second electromagnetic valve is de-energized, the second inlet is communicated with the second outlet in a one-way manner, and when the second electromagnetic valve is energized, the second inlet is communicated with the second outlet in a two-way manner.
3. The wind turbine proportional servo controlled hydraulic pitch system of claim 2, the hydraulic pitch control system for the wind driven generator proportional servo control further comprises a third electromagnetic valve and a third one-way valve, the third electromagnetic valve and the third one-way valve are arranged on the valve block, the third electromagnetic valve is a two-position two-way valve, the third electromagnetic valve is provided with a third inlet and a third outlet, the third outlet is connected with the oil inlet, the third inlet is connected with the inlet of the third one-way valve, when the third electromagnetic valve is de-energized, the third outlet is communicated with the third inlet in a two-way mode, when the third electromagnetic valve is electrified, the third inlet is communicated with the third outlet in a one-way mode, and the outlet of the third one-way valve is connected to a pipeline between the first electromagnetic valve and the hydraulic cylinder.
4. The wind turbine proportional servo controlled hydraulic pitch system of claim 1, further comprising a pressure sensor mounted on a conduit between the first solenoid valve and the hydraulic cylinder.
5. The wind turbine proportional servo controlled hydraulic pitch system of claim 1, wherein the valve block is made of ductile iron.
6. The wind turbine proportional servo controlled hydraulic pitch system of claim 5, wherein an outer surface of the valve block is zinc-nickel plated.
7. The wind turbine proportional servo controlled hydraulic pitch system according to claim 1, wherein a plurality of pressure taps are connected to a pipeline of the wind turbine proportional servo controlled hydraulic pitch system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157658.3A CN114109927A (en) | 2021-02-04 | 2021-02-04 | Hydraulic variable pitch system for proportional servo control of wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157658.3A CN114109927A (en) | 2021-02-04 | 2021-02-04 | Hydraulic variable pitch system for proportional servo control of wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114109927A true CN114109927A (en) | 2022-03-01 |
Family
ID=80359280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110157658.3A Pending CN114109927A (en) | 2021-02-04 | 2021-02-04 | Hydraulic variable pitch system for proportional servo control of wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114109927A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0742663A (en) * | 1993-07-28 | 1995-02-10 | Mitsubishi Heavy Ind Ltd | Windmill |
| CN102808730A (en) * | 2012-08-23 | 2012-12-05 | 上海汇益控制***股份有限公司 | High-power wind power generation hydraulic variable pitch system |
| EP2990664A1 (en) * | 2014-08-27 | 2016-03-02 | Siemens Aktiengesellschaft | Hydraulic system |
| CN106704275A (en) * | 2016-12-30 | 2017-05-24 | 北京金风科创风电设备有限公司 | Hydraulic loading system of hydraulic pitch control test bed of wind generating set |
| US20180216638A1 (en) * | 2016-02-29 | 2018-08-02 | Mitsubishi Heavy Industries, Ltd. | Wind turbine, control device for same, and control method for same |
| CN109441724A (en) * | 2018-12-26 | 2019-03-08 | 北京金风科创风电设备有限公司 | Safety throttling device and method for hydraulic pitch control system and hydraulic pitch control system |
| CN112112758A (en) * | 2020-09-25 | 2020-12-22 | 大唐锡林郭勒风力发电有限责任公司 | Electro-hydraulic variable pitch control system and control method based on wind turbine generator |
-
2021
- 2021-02-04 CN CN202110157658.3A patent/CN114109927A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0742663A (en) * | 1993-07-28 | 1995-02-10 | Mitsubishi Heavy Ind Ltd | Windmill |
| CN102808730A (en) * | 2012-08-23 | 2012-12-05 | 上海汇益控制***股份有限公司 | High-power wind power generation hydraulic variable pitch system |
| EP2990664A1 (en) * | 2014-08-27 | 2016-03-02 | Siemens Aktiengesellschaft | Hydraulic system |
| US20180216638A1 (en) * | 2016-02-29 | 2018-08-02 | Mitsubishi Heavy Industries, Ltd. | Wind turbine, control device for same, and control method for same |
| CN106704275A (en) * | 2016-12-30 | 2017-05-24 | 北京金风科创风电设备有限公司 | Hydraulic loading system of hydraulic pitch control test bed of wind generating set |
| CN109441724A (en) * | 2018-12-26 | 2019-03-08 | 北京金风科创风电设备有限公司 | Safety throttling device and method for hydraulic pitch control system and hydraulic pitch control system |
| CN112112758A (en) * | 2020-09-25 | 2020-12-22 | 大唐锡林郭勒风力发电有限责任公司 | Electro-hydraulic variable pitch control system and control method based on wind turbine generator |
Non-Patent Citations (1)
| Title |
|---|
| 陈启松: "《液压传动与控制手册》", 上海科学技术出版社, pages: 750 - 751 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106870289B (en) | Hydrostatic energy storage type hydraulic drive wind generating set and control method | |
| WO2017071027A1 (en) | Multi-cylinder synchronized, power-saving, high-efficiency hydraulic lifting/lowering system and method | |
| CN101598232B (en) | Electro-hydraulic driver of control valve | |
| CN101709725B (en) | Downhole anti-explosion hoisting machine hydraulic control system adopting multi-pump combination technique | |
| CN101498281B (en) | Direct drive type hydraulic variable pitch controlling mechanism for wind power generator | |
| CN200974743Y (en) | Energy-saving tower machine hydraulic stepless change control system | |
| CN104925685A (en) | Winch hydraulic system controlling guide rope through stepless speed regulating constant tension | |
| CA2705172A1 (en) | Electro-hydraulic actuator for controlling the pitch of a blade of a wind turbine | |
| CN207485602U (en) | A kind of wind power generating set digital hydraulic pitch-controlled system | |
| CN103397678A (en) | Power matching energy-saving system and method for engine and hydraulic pump | |
| AU2018386354B2 (en) | Hydraulic driving system and driving method for barring | |
| CN105386953A (en) | Digital flow-distribution constant-flow radial plunger pump | |
| CN201526546U (en) | Hydraulic control system of underground anti-explosion hoister adopting multi-pump combination technique | |
| KR20130086130A (en) | Rotor blade pitch adjustment device | |
| CN208950998U (en) | A kind of hydraulic system of the series-parallel mode conversion of hydraulic cylinder | |
| CN203583549U (en) | Underground continuous wall hydraulic grab bucket | |
| CN114109927A (en) | Hydraulic variable pitch system for proportional servo control of wind driven generator | |
| CN211116877U (en) | Integrated bidirectional pump-controlled high-speed double-cylinder synchronous hydraulic control system | |
| CN108547833B (en) | A kind of electrohydraulic system utilized for heave compensator energy regenerating and working method | |
| CN115289077B (en) | Integrated pump control driving system for concrete arm support and control method | |
| CN100370115C (en) | Servomotor oil circuit regulating valve assembly of steam turbine regulating system | |
| CN216430089U (en) | Multi-oil-cylinder synchronous control system based on variable flow and displacement feedback | |
| CN115263831A (en) | Energy-saving hydraulic pressure maintaining device and control method thereof | |
| CN114955868A (en) | Load port independent control valve, hoisting machinery hydraulic system and working method thereof | |
| CN209323586U (en) | A kind of excavator energy-saving hydraulic control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220301 |