CN115111293A - Fan driftage hydraulic brake and braking system - Google Patents
Fan driftage hydraulic brake and braking system Download PDFInfo
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- CN115111293A CN115111293A CN202210504437.3A CN202210504437A CN115111293A CN 115111293 A CN115111293 A CN 115111293A CN 202210504437 A CN202210504437 A CN 202210504437A CN 115111293 A CN115111293 A CN 115111293A
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- 238000013016 damping Methods 0.000 claims abstract description 30
- 230000004044 response Effects 0.000 abstract description 11
- 239000003921 oil Substances 0.000 description 140
- 239000011148 porous material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0204—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
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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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0244—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for braking
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- 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
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/04—Cylinders
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a fan yaw hydraulic brake and a brake system, relates to the technical field of yaw braking of wind generating sets, solves the problem that the existing fan yaw hydraulic brake system is easily affected by low temperature, improves the brake response speed and the control precision, and has the following specific scheme: the hydraulic brake caliper comprises an upper caliper body and a lower caliper body which are oppositely arranged from top to bottom, wherein at least one brake piston cylinder is respectively arranged inside the upper caliper body and the lower caliper body, the two brake piston cylinders are communicated through a connecting pipeline, the oil inlet end of the brake piston cylinder inside the upper caliper body is communicated with a first oil inlet on the upper caliper body, and the oil outlet end of the brake piston cylinder inside the lower caliper body is communicated with a damping control circuit and a pressure relief control circuit which are fixedly arranged in a brake pressure control valve group on the side wall of the lower caliper body and are connected in parallel.
Description
Technical Field
The invention relates to the technical field of yaw braking of wind generating sets, in particular to a fan yaw hydraulic brake and a brake system.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In winter, the weather is cold, the environment is severe, and even extremely cold weather below-40 ℃ can appear in part of wind power plants, so that severe examination is brought to the operation and survival of the fan. When the fan normally runs to generate electricity, because the surfaces of most parts such as the gear box, the generator, the main bearing and the like generate a large amount of radiant heat, the temperature in the engine room cannot be too low even in cold winter. However, the operation of the fan is influenced by natural wind conditions and unit states, and working conditions such as long-time standby and the like, fault shutdown, undergeneration or limited power operation and the like are inevitable, and at the moment, the temperature difference between the inside of the cabin and the external environment is gradually reduced and even possibly reduced to the ambient temperature.
The inventor finds that when the temperature of a cabin is reduced, the viscosity of hydraulic oil is increased, the flowability is poor, the resistance and the pressure loss of the oil flowing through a hydraulic element, a yaw hydraulic brake and a brake pipeline are increased, and the performance of a yaw hydraulic brake system is reduced along with the increase of the resistance and the pressure loss, and mainly shows that the response speed is reduced when a fan yaw hydraulic brake group is converted from full-pressure braking to damping braking or zero-pressure cable release, the deviation occurs between the damping braking pressure and the set value of a back pressure valve of a hydraulic station, the pressure relief and the brake release of brakes at different positions are asynchronous, and the like. The lower the temperature in the cabin is, the slower the response speed of the yaw hydraulic brake system is, the larger the damping brake pressure deviation is, and the unit vibration and noise are easily caused by slow release of the yaw hydraulic brake when the fan is started in a yaw mode, even the yaw driving motor is subjected to overload tripping due to overlarge damping load, so that the operation and safety of the fan are seriously influenced.
And the fan yaw hydraulic brake is positioned at the position where the bottom of the fan main frame is connected with the tower drum, and the brake is connected with the hydraulic station and the brake through longer brake pipelines. The oil quantity required for pressure compensation or pressure relief is small when the fan yaw hydraulic braking states (full pressure braking, damping braking and zero pressure cable release) are switched, so that the oil liquid flowability in the brake and the brake pipeline is poor. Therefore, the fan yaw hydraulic brake system is easily affected by low temperature, and the higher the number of brakes, the longer the brake line, and the more severe the low temperature effect.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a fan yaw hydraulic brake and a brake system, wherein the brake has a brake pressure control valve group with damping control and pressure relief control functions, so that the actions and controls of fan yaw full-pressure braking, damping braking and pressure relief cable release are realized, and the problem that the existing fan yaw hydraulic brake system is easily influenced by low temperature is solved.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a fan yaw hydraulic brake, which comprises an upper caliper body and a lower caliper body which are oppositely arranged up and down, wherein at least one brake piston cylinder is respectively arranged in the upper caliper body and the lower caliper body, the two brake piston cylinders are communicated through a connecting pipeline, the oil inlet end of the brake piston cylinder in the upper caliper body is communicated with a first oil inlet on the upper caliper body, and the oil outlet end of the brake piston cylinder in the lower caliper body is communicated with a damping control circuit and a pressure relief control circuit which are fixedly arranged in a brake pressure control valve group on the side wall of the lower caliper body and are connected in parallel.
As a further implementation manner, the brake pressure control valve group is composed of an oil path block, and a first electromagnetic valve, a second electromagnetic valve, an overflow valve and a pressure measuring joint which are arranged on the oil path block, wherein the oil path block is fixedly arranged on the side wall of the lower caliper body, the oil path block is provided with a fourth oil inlet and an oil return port which are externally connected, and the fourth oil inlet is communicated with a brake piston cylinder in the lower caliper body.
As a further implementation mode, the second electromagnetic valve is connected with an overflow valve in series, an oil inlet hole of the second electromagnetic valve is communicated with the brake piston cylinder in the lower caliper body, and an oil outlet hole of the overflow valve is communicated with an oil return port on the oil path block to form a damping control loop; and an oil inlet hole of the first electromagnetic valve is communicated with a brake piston cylinder in the lower caliper body, and an oil outlet hole of the first electromagnetic valve is communicated with an oil return port on the oil path block to form a pressure relief control loop.
As a further implementation manner, the damping control circuit and the pressure relief control circuit share a fourth oil inlet and an oil return port on the oil path block.
As a further implementation manner, the pressure measuring joint is arranged on an oil inlet path of the brake pressure control valve group.
As a further implementation manner, a second oil inlet is formed in the upper caliper body, a third oil inlet is formed in the lower caliper body, and the connecting pipeline connects the upper caliper body and the brake piston cylinder in the lower caliper body through the second oil inlet and the third oil inlet.
As a further implementation manner, the bottom plane of the brake pressure control valve group is higher than the bottom plane of the lower caliper body.
As a further implementation mode, the end parts of piston rods of the brake piston cylinders in the upper caliper body and the lower caliper body are respectively provided with a friction plate.
In a second aspect, the invention provides a braking system, which utilizes the fan yaw hydraulic brake, and comprises at least one fan yaw hydraulic brake and a plurality of conventional hydraulic brakes connected in series with the fan yaw hydraulic brake, wherein the oil inlet end of the conventional hydraulic brake at the head end is connected with a hydraulic station, and the oil return port on the fan yaw hydraulic brake is connected with an oil tank in an oil return manner.
As a further implementation, the fan yaw hydraulic brake is located between all the series brakes;
or,
and 1 fan yaw hydraulic brake is connected in series after every 3-5 conventional hydraulic brakes.
The beneficial effects of the invention are as follows:
(1) according to the fan yaw hydraulic brake, the brake pressure control valve group is directly communicated with the brake piston cylinder in the caliper body through the short oil path pore channel, so that the influence of a long oil return pipeline between the brake and a hydraulic station on the pressure relief response performance is avoided, and the pressure relief response speed and the pressure control precision of the brake are effectively improved.
(2) The bottom plane of the brake pressure control valve group is higher than that of the lower caliper body, so that the brake pressure control valve group can be effectively prevented from interfering with a placing table surface and bearing the gravity of a brake when the brake is placed, and the brake pressure control valve group is prevented from being damaged.
(3) According to the invention, through the brake pressure control valve group with the damping control and pressure relief control functions, the fan yaw is not dependent on a hydraulic station when being controlled from full-pressure braking to damping braking or zero-pressure cable release, the influence of an oil return braking pipeline from a braking system to the hydraulic station on the damping pressure relief and the full pressure relief of the braking system is avoided, and the response speed and the control precision of the fan yaw hydraulic braking system in a low-temperature environment are improved.
(4) The yaw hydraulic brake of the fan has good universality and replaceability with the existing conventional yaw hydraulic brake of the fan, which is beneficial to the flexible design of a yaw hydraulic brake system of a new fan and the transformation and optimization of a yaw hydraulic brake system of an old fan, and greatly reduces the use or transformation cost of the brake system.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a hydraulic schematic diagram of a fan yaw hydraulic brake according to one or more embodiments of the present disclosure;
FIG. 2 is a front view structural schematic diagram of a fan yaw hydraulic brake according to one or more embodiments of the present disclosure;
FIG. 3 is a left side structural schematic view of a fan yaw hydraulic brake according to one or more embodiments of the present disclosure;
FIG. 4 is a schematic illustration of a configuration of a braking system according to one or more embodiments of the present disclosure;
FIG. 5 is another schematic illustration of a braking system according to one or more embodiments of the present disclosure;
in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;
the brake system comprises a brake cylinder, a brake piston, a brake cylinder and a brake device, wherein 1, the brake cylinder is a first brake cylinder; 2. a second brake piston cylinder; 3. a first solenoid valve; 4. a second solenoid valve; 5. an overflow valve; 6. a pressure measuring joint; 7.1, a first oil inlet; 7.2, a second oil inlet; 7.3, a third oil inlet; 7.4, a fourth oil inlet; 8. an oil return port; 9. an upper clamp body; 10. a lower clamp body; 11. an oil circuit block; 12. a bolt; 13. connecting a pipeline; 14. a source of pressurized oil; 15. an oil tank; 16. a yaw brake disc; 17. a friction plate.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As introduced in the background art, the existing fan yaw hydraulic brake system is susceptible to low temperature, and the problems that the response speed is slow when full-pressure braking is converted into damping braking or zero-pressure cable release, the deviation occurs between the damping braking pressure and the set value of the hydraulic station backpressure valve, and the pressure relief and brake release of the brakes at different positions are asynchronous can occur, are solved.
Example 1
In an exemplary embodiment of the present invention, as shown in fig. 1 to 3, a hydraulic yaw brake for a wind turbine is provided, which includes an upper caliper body 9, a lower caliper body 10, and a brake pressure control valve set disposed on an outer surface of the lower caliper body 10.
The upper caliper body 9 is internally provided with a first brake piston cylinder 1, the lower caliper body 10 is internally provided with a second brake piston cylinder 2, the upper caliper body 9 is positioned right above the lower caliper body 10, the outer surfaces of the upper caliper body 9 and the lower caliper body 10 are respectively provided with a friction plate 17, specifically, one side of the upper caliper body 9 adjacent to the lower caliper body 10 is provided with the friction plate 17, one side of the lower caliper body 10 adjacent to the upper caliper body 9 is also provided with the friction plate 17, and a yaw brake disc 16 is clamped between the friction plates 17 on the upper caliper body 9 and the lower caliper body 10 and used for yaw braking of the fan.
As shown in fig. 1, the friction plate 17 on the upper caliper body 9 is positioned at the end of the piston rod on the first brake piston cylinder 1; the friction plate 17 on the lower caliper body 10 is positioned at the end part of the piston rod on the second brake piston cylinder 2, and the friction plate 17 on the upper caliper body 9 and the friction plate 17 on the lower caliper body 10 are correspondingly controlled to be pressed or released through the first piston cylinder 1 and the second piston cylinder 2 respectively.
The brake pressure control valve group is mounted on the lower caliper body 10 and connected with the second brake piston cylinder 2 in the lower caliper body 10, for convenience of description, this embodiment is described in the direction shown in fig. 3, specifically, the brake pressure control valve group is fixedly mounted on the back of the lower caliper body 10, and the bottom plane of the brake pressure control valve group does not exceed the bottom plane of the lower caliper body 10, that is, the bottom plane of the brake pressure control valve group may be flush with the caliper body mounting surface at the bottom of the lower caliper body 10, or may be higher than the caliper body mounting surface at the bottom of the lower caliper body 10, so as to avoid the brake pressure control valve group interfering with the placement table surface and bearing the gravity of the brake when the brake is placed.
The back that brake pressure control valves mounted position was lower pincers body 10, operating space is bigger around the valves like this, and the valves installation is more convenient with the maintenance, and hydraulic oil leaks outward and causes the pollution to the stopper when can also avoiding the valves to take place to leak (ooze) oil or when dismantling the valves simultaneously.
It is understood that the number of the brake cylinders in the upper caliper body 9 and the lower caliper body 10 may be one or more, and the specific number is selected according to the actual design requirement, which is not limited herein.
As shown in fig. 2, the brake pressure control valve group is composed of an oil path block 11, a first electromagnetic valve 3, a second electromagnetic valve 4, an overflow valve 5 and a pressure measuring joint 6, wherein the oil path block 11 is fixedly arranged on the back of the lower caliper body 10 through a bolt 12, the bottom of the oil path block 11 is not more than the caliper body mounting surface at the bottom of the lower caliper body 10, an oil inlet hole of the oil path block 11 is communicated with an oil inlet hole of a second brake piston cylinder 2 inside the lower caliper body 10, and the oil path block 11 and the lower caliper body 10 are connected through a sealing ring for sealing.
It is understood that in other embodiments, the brake pressure control valve set may also be disposed on the back surface of the upper caliper body 9, and the specific location on which the back surface of the upper caliper body is disposed may be selected according to actual requirements, and is preferably the back surface of the lower caliper body 10, and the embodiment is described by taking the back surface of the lower caliper body 10 as an example.
And a fourth oil inlet 7.4 and an oil return port 8 which are externally connected are arranged on the oil path block 11, and the fourth oil inlet 7.4 and the oil return port 8 are both positioned on the side surface, away from the back surface of the clamp body, of the oil path block 11, namely the back surface of the oil path block 11, so that the pipelines can be conveniently connected and installed.
As shown in fig. 1, a fourth oil inlet 7.4 is communicated with an oil inlet duct of the second brake piston cylinder 2 in the lower caliper body 10, and the fourth oil inlet 7.4 is used for connecting an adjacent brake and has the same function as a conventional oil inlet on the caliper body; the return port 8 is used for connecting a return line of the oil tank 15.
An overflow valve 5 and a pressure measuring joint 6 are fixedly arranged on the side wall of the oil circuit block 11, and two electromagnetic valves, namely a first electromagnetic valve 3 and a second electromagnetic valve 4, are fixedly arranged at the top of the oil circuit block 11.
Wherein, the oil inlet hole of the first electromagnetic valve 3 is communicated with the oil inlet pore passage on the second brake piston cylinder 2 in the lower caliper body 10, and the oil outlet hole of the first electromagnetic valve 3 is communicated with the oil return port 8 on the oil path block 11 to form a pressure relief control loop;
the second electromagnetic valve 4 is connected with the overflow valve 5 in series, an oil inlet hole of the second electromagnetic valve 4 is communicated with an oil inlet pore passage on the second brake piston cylinder 2 in the lower caliper body 10, an oil outlet hole of the second electromagnetic valve 4 is communicated with an oil inlet hole of the overflow valve 5, and an oil outlet hole of the overflow valve 5 is communicated with an oil return port 8 on an oil path block 11 to form a damping control loop.
The damping control circuit and the pressure relief control circuit are designed in parallel, a fourth oil inlet 7.4 and an oil return port 8 in the oil path block 11 are shared, specifically, the fourth oil inlet 7.4 is communicated with oil inlet holes in the first electromagnetic valve 3 and the second electromagnetic valve 4 at the same time, the pressure measuring joint 6 is arranged at a pressure measuring point of an oil path pipeline connected with the first electromagnetic valve 3, the second electromagnetic valve 4 and the fourth oil inlet 7.4, and an external pressure gauge can be conveniently used for checking the size of the brake pressure.
The first electromagnetic valve 3, the second electromagnetic valve 4 and the overflow valve 5 are all plug-in hydraulic valves so as to reduce the overall size of the valve group. The first electromagnetic valve 3 and the second electromagnetic valve 4 are both two-position two-way electromagnetic valves, and when the electricity is not supplied, the valve core is in an oil cut-off state; on the contrary, when the electromagnetic valve is electrified, the valve core is in an oil passing state.
It can be understood that the first solenoid valve 3 and the second solenoid valve 4 can be further provided with a locking device, so that manual control is facilitated, and the emergency capacity of the brake pressure control valve bank is improved.
As shown in fig. 2, the back surface of the upper caliper body 9 is provided with a first oil inlet 7.1 and a second oil inlet 7.2, and the back surface of the lower caliper body 10 is provided with a third oil inlet 7.3, wherein the first oil inlet 7.1 is respectively communicated with an external pressure oil source 14 and the first brake piston cylinder 1 inside the upper caliper body 9 through pipelines, and is used for conveying pressure oil into the first brake piston cylinder 1;
the second oil inlet 7.2 is communicated with the first brake piston cylinder 1, the third oil inlet 7.3 is communicated with the second brake piston cylinder 2, and the second oil inlet 7.2 is communicated with the third oil inlet 7.3 through the connecting pipeline 13, so that the communication of an oil way between the first brake piston cylinder 1 and the second brake piston cylinder 2 is realized, wherein the connecting pipeline 13 can be a steel pipe or a hose structure, and specific pipes are selected according to actual requirements.
The brake pressure control valve group of the fan yaw hydraulic brake is directly communicated with the brake piston cylinder in the caliper body through a short oil path pore channel, so that the influence of a long oil return pipeline between the brake and a hydraulic station on the pressure relief response performance is avoided, and the pressure relief response speed and the pressure control precision of the brake can be improved.
The specific working principle is as follows:
the brake is divided into three brake states, wherein when the first electromagnetic valve 3 and the second electromagnetic valve 4 are not electrified, the first electromagnetic valve 3 and the second electromagnetic valve 4 are in a disconnected state, the first brake piston cylinder 1 and the second brake piston cylinder 2 can form a closed cavity, and the brake is in a full-pressure brake state so as to meet the requirement of full-pressure brake;
when the second electromagnetic valve 4 is electrified, the second electromagnetic valve 4 is opened, the brake pressure oil is overflowed and unloaded through the overflow valve 5 to reach a damping pressure value required by design, and the brake is in a damping braking state, wherein the opening pressure of the overflow valve 5 is generally set to be 5-35 bar;
when the third electromagnetic valve 3 is electrified, the third electromagnetic valve 3 is opened, the brake is directly communicated with the oil return of the oil tank 15, the pressure of the brake is quickly relieved to zero, and the brake is in a zero-pressure cable-releasing state at the moment.
Example 2
In another exemplary embodiment of the present invention, as shown in fig. 4-5, a braking system is provided, which includes at least one fan yaw hydraulic brake as described in example 1 and a plurality of conventional hydraulic brakes.
The conventional hydraulic brake is a traditional hydraulic brake, belongs to the existing structure, and is not provided with a brake pressure control valve group, and the specific structural form is not described in detail herein.
The fan yaw hydraulic brake and a plurality of conventional hydraulic brakes are arranged in series, wherein the fan yaw hydraulic brake is arranged between all the series brakes, preferably in the middle position of all the series brakes, so as to shorten the distance from all the conventional hydraulic brakes positioned in front of and behind the fan yaw hydraulic brake in the embodiment 1 to the brake pressure control valve bank, improve the pressure relief response speed and pressure control precision of the brake bank to the maximum extent, simultaneously improve the pressure relief synchronism of the brakes at different positions, and when the number of the conventional brakes is too large, the fan yaw hydraulic brake in the embodiment 1 is optimally connected in series after every 3-5 conventional hydraulic brakes.
Specifically, as shown in fig. 4, a fan yaw hydraulic brake according to embodiment 1 and four conventional hydraulic brakes are provided, and for convenience of description, in this embodiment, the brakes are numbered, where the fan yaw hydraulic brake (according to embodiment 1) located at the middle position is 3#, and two conventional hydraulic brakes are respectively provided on two sides of the fan yaw hydraulic brake, and the numbers are divided into 1#, 2#, 4# and 5 #.
The 1# to 5# brakes are sequentially connected in series through a brake pipeline, specifically, an oil inlet end of the first-end 1# brake is connected with a pressure oil source 14, an oil outlet end of the 1# brake is communicated with an oil inlet end of the 2# brake, an oil outlet end of the 2# brake is communicated with a first oil inlet 7.1 of a 3# fan yawing hydraulic brake, a fourth oil inlet 7.4 of the 3# fan yawing hydraulic brake is communicated with an oil inlet end of the 4# brake, an oil outlet end of the 4# brake is communicated with an oil inlet end of the 5# brake, and an oil return port 8 on the 3# fan yawing hydraulic brake is connected with an oil tank 15.
When the braking system performs yaw full-pressure braking, the first electromagnetic valve 3 and the second electromagnetic valve 4 of the braking pressure control valve group on the 3# fan yaw hydraulic brake are not powered, and the pressure oil source 14 provides high-pressure braking oil for the braking system to realize full-pressure braking;
when yaw damping braking is carried out, the pressure oil source 14 stops supplying oil to the braking system, the second electromagnetic valve 4 of the braking pressure control valve group is electrified, and all brakes are relieved to damping pressure through the braking pressure control valve group;
when the yaw zero-pressure cable is released, the pressure oil source 14 stops supplying oil to the braking system, the first electromagnetic valve 3 of the braking pressure control valve bank is electrified, and all the brakes realize complete pressure relief through the braking pressure control valve bank.
As shown in fig. 5, two fan yaw hydraulic brakes according to embodiment 1 and eleven conventional hydraulic brakes are provided, wherein the fan yaw hydraulic brakes according to embodiment 1 are respectively 4# and 9#, the conventional hydraulic brakes are respectively 1# -3 #, 5# -8 # and 10# -12 #, and the 1# -12 # brakes are connected in series through brake pipelines in sequence.
The connection between the 1# brake and the 5# brake is taken as an example for explanation, wherein an oil inlet end of the 1# brake is connected with a pressure oil source 14, an oil outlet end of the 1# brake is connected with an oil inlet end of the 2# brake, an oil outlet end of the 2# brake is connected with an oil inlet end of the 3# brake, an oil outlet end of the 3# brake is connected with a first oil inlet 7.1 of a 4# fan yaw hydraulic brake, a fourth oil inlet 7.4 of the 4# fan yaw hydraulic brake is connected with an oil inlet end of the 5# brake, an oil return port 8 of the 4# fan yaw hydraulic brake is further connected with an oil tank 15 in an oil return mode, and the connection mode between the subsequent brakes of the various numbers is the same as the connection mode between the 1# brake and the 5# brake, and redundant description is omitted here.
When the braking system performs yaw full-pressure braking, the first electromagnetic valve 3 and the second electromagnetic valve 4 of the braking pressure control valve group of the 4# fan yaw hydraulic brake and the 9# fan yaw hydraulic brake are not electrified, and the pressure oil source 14 provides high-pressure braking pressure for the braking system so as to realize full-pressure braking;
when yaw damping braking is carried out, the pressure oil source 14 stops supplying oil to the braking system, the braking pressure control valve groups of the fan yaw hydraulic brakes No. 4 and No. 9 control the second electromagnetic valve 4 to be electrified, and each brake releases pressure to damping pressure through the braking pressure control valve group which is closer to the brake;
when the yaw zero-pressure cable is released, the pressure oil source 14 stops supplying oil to the brake group, the brake pressure control valve groups of the 4# and 9# fan yaw hydraulic brakes control the first electromagnetic valve 3 to be electrified, and the brakes realize complete pressure release through the brake pressure control valve groups which are closer to the brakes.
It is understood that other numbers of fan yaw hydraulic brakes and conventional hydraulic brakes may be provided in other embodiments, and the specific number of settings is selected according to actual requirements, which is not limited herein.
Through the brake pressure control valve group with the damping control and pressure relief control functions, the fan yaw does not depend on a hydraulic station when being controlled by full-pressure braking-to-damping braking or zero-pressure cable release, the influence of an oil return braking pipeline from a braking system to the hydraulic station on damping pressure relief and complete pressure relief of a brake group is avoided, and the response speed and the control precision of the fan yaw hydraulic braking system in a low-temperature environment are improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The fan yaw hydraulic brake is characterized by comprising an upper caliper body and a lower caliper body which are oppositely arranged from top to bottom, wherein at least one brake piston cylinder is arranged inside each of the upper caliper body and the lower caliper body, the two brake piston cylinders are communicated through a connecting pipeline, the oil inlet end of each brake piston cylinder inside the upper caliper body is communicated with a first oil inlet on the upper caliper body, and the oil outlet end of each brake piston cylinder inside the lower caliper body is communicated with a damping control circuit and a pressure relief control circuit which are fixedly installed in a brake pressure control valve group on the side wall of the lower caliper body and are connected in parallel.
2. The fan yaw hydraulic brake of claim 1, wherein the brake pressure control valve set comprises an oil path block, and a first electromagnetic valve, a second electromagnetic valve, an overflow valve and a pressure measuring joint which are arranged on the oil path block, the oil path block is fixedly arranged on a side wall of the lower caliper body, the oil path block is provided with a fourth oil inlet and an oil return opening which are connected with each other, and the fourth oil inlet is communicated with a brake piston cylinder inside the lower caliper body.
3. The fan yaw hydraulic brake of claim 2, wherein the second electromagnetic valve is connected in series with an overflow valve, an oil inlet of the second electromagnetic valve is communicated with the brake piston cylinder in the lower caliper body, and an oil outlet of the overflow valve is communicated with an oil return port on an oil path block to form a damping control loop; and an oil inlet hole of the first electromagnetic valve is communicated with a brake piston cylinder in the lower caliper body, and an oil outlet hole of the first electromagnetic valve is communicated with an oil return port on the oil path block to form a pressure relief control loop.
4. The fan yaw hydraulic brake of claim 3, wherein the damping control circuit and the pressure relief control circuit share a fourth oil inlet and an oil return port on the oil path block.
5. A fan yaw hydraulic brake as claimed in claim 2, wherein the pressure taps are located on the brake pressure control valve block oil inlet line.
6. The fan yaw hydraulic brake of claim 2, wherein the upper caliper body is provided with a second oil inlet, the lower caliper body is provided with a third oil inlet, and the connecting pipeline connects the upper caliper body and the brake piston cylinder inside the lower caliper body through the second oil inlet and the third oil inlet.
7. A fan yaw hydraulic brake as claimed in claim 1, wherein the bottom plane of the brake pressure control valve set is higher than the bottom plane of the lower caliper body.
8. A fan yaw hydraulic brake according to claim 1, characterized in that a friction plate is arranged at the end of each piston rod of the brake piston cylinder inside each of the upper caliper body and the lower caliper body.
9. A braking system, characterized in that a fan yaw hydraulic brake according to any one of claims 1-8 is utilized, and the fan yaw hydraulic brake comprises at least one fan yaw hydraulic brake and a plurality of conventional hydraulic brakes connected in series with the fan yaw hydraulic brake, wherein the oil inlet end of the conventional hydraulic brake at the head end is connected with a hydraulic station, and the oil return port on the fan yaw hydraulic brake is connected with an oil tank in an oil return mode.
10. A braking system according to claim 9 wherein the fan yaw hydraulic brake is located between all of the tandem brakes;
or,
and 1 fan yaw hydraulic brake is connected in series after every 3-5 conventional hydraulic brakes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210504437.3A CN115111293B (en) | 2022-05-10 | 2022-05-10 | Fan yaw hydraulic brake and braking system |
| PCT/CN2022/128362 WO2023216522A1 (en) | 2022-05-10 | 2022-10-28 | Fan yaw hydraulic brake and braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210504437.3A CN115111293B (en) | 2022-05-10 | 2022-05-10 | Fan yaw hydraulic brake and braking system |
Publications (2)
| Publication Number | Publication Date |
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| CN115111293A true CN115111293A (en) | 2022-09-27 |
| CN115111293B CN115111293B (en) | 2024-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210504437.3A Active CN115111293B (en) | 2022-05-10 | 2022-05-10 | Fan yaw hydraulic brake and braking system |
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| Country | Link |
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| CN (1) | CN115111293B (en) |
| WO (1) | WO2023216522A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216522A1 (en) * | 2022-05-10 | 2023-11-16 | 中车山东风电有限公司 | Fan yaw hydraulic brake and braking system |
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| JPH11170998A (en) * | 1997-12-15 | 1999-06-29 | Unisia Jecs Corp | Brake device |
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| US20190344767A1 (en) * | 2018-05-09 | 2019-11-14 | Robert Bosch Gmbh | Electro-hydraulic power vehicle-brake system for an autonomously driving land vehicle |
| CN112727859A (en) * | 2021-01-29 | 2021-04-30 | 内蒙古天诚商贸有限责任公司 | Hydraulic station special for wind power and improvement method thereof |
| CN115111293B (en) * | 2022-05-10 | 2024-08-09 | 中车山东风电有限公司 | Fan yaw hydraulic brake and braking system |
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- 2022-10-28 WO PCT/CN2022/128362 patent/WO2023216522A1/en unknown
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| CN105569918A (en) * | 2015-12-17 | 2016-05-11 | 新疆金风科技股份有限公司 | Wind generating set and yaw control system and yaw control method thereof, and brake caliper |
| CN205745024U (en) * | 2016-06-27 | 2016-11-30 | 国电联合动力技术有限公司 | A kind of wind generating set yaw brake fluid system and wind power generating set |
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| WO2023216522A1 (en) * | 2022-05-10 | 2023-11-16 | 中车山东风电有限公司 | Fan yaw hydraulic brake and braking system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115111293B (en) | 2024-08-09 |
| WO2023216522A1 (en) | 2023-11-16 |
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