CN106704275B - Hydraulic loading system of hydraulic pitch control test bed of wind generating set - Google Patents
Hydraulic loading system of hydraulic pitch control test bed of wind generating set Download PDFInfo
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- CN106704275B CN106704275B CN201611257218.0A CN201611257218A CN106704275B CN 106704275 B CN106704275 B CN 106704275B CN 201611257218 A CN201611257218 A CN 201611257218A CN 106704275 B CN106704275 B CN 106704275B
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- 238000011068 loading method Methods 0.000 title claims abstract description 68
- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 36
- 239000003921 oil Substances 0.000 claims description 88
- 239000012530 fluid Substances 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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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
- 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
-
- 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
- F15B1/027—Installations or systems with accumulators having accumulator charging devices
- F15B1/0275—Installations or systems with accumulators having accumulator charging devices with two or more pilot valves, e.g. for independent setting of the cut-in and cut-out pressures
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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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/89—Control specific for achieving vacuum or "negative pressure"
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Wind Motors (AREA)
Abstract
The utility model provides a wind generating set hydraulic pressure becomes oar test bench loading hydraulic system includes: a hydraulic oil tank (1); a hydraulic pump (2); a first electromagnetic directional valve (5); a first check valve (7.1), a second check valve (7.2) and a third check valve (7.3); a proportional directional valve (8); a stop valve (9); an accumulator assembly (10); a first pressure sensor (11.1), a second pressure sensor (11.2) and a third pressure sensor (11.3); a second electromagnetic directional valve (12); a first proportional relief valve (13.1) and a second proportional relief valve (13.2); a load cylinder (14).
Description
Technical field
This application involves wind power generation fields, add more particularly, to a kind of wind power generating set hydraulic vane change testing stand
Load hydraulic system.
Background technology
As wind power generating set develops to enlargement direction, in wind when because hydraulic variable propeller system power density is high the advantages that
The application of power generator group is more and more extensive.Therefore, understand the characteristic of hydraulic variable propeller system and grasp the fortune of hydraulic variable propeller system
Professional etiquette is restrained, and what is just become is more and more important.It is exactly to establish relevant testing stand to understand the most directly simple method of hydraulic variable propeller system,
By experimental study, the characteristic of hydraulic variable propeller system is grasped.
Traditional wind group hydraulic vane change testing stand loading hydraulic system is capable of the operation of wind-driven generator simulation group
Load, generally uses proportional pressure control valve, however proportional pressure control valve dynamic response frequency is relatively low in systems.Therefore, it is necessary to one kind
Response frequency is high, load accurately and reliably, meet the wind power generating set hydraulic vane change testing stand loadings of system loads characteristic requirements
Hydraulic system.
Invention content
According to an aspect of the present invention, a kind of wind power generating set hydraulic vane change testing stand loading hydraulic system is provided,
Including：Hydraulic oil container；Hydraulic pump, including hydraulic pressure pump inlet and hydraulic pump outlet；First solenoid directional control valve is changed including the first electromagnetism
To the first working hole of valve, the first solenoid directional control valve oil return opening, first the second working hole of solenoid directional control valve and the first solenoid directional control valve
Oil inlet；First check valve, including the first check valve inlet and the first one-way valved outlet；Second check valve, it is unidirectional including second
Valve import and the second one-way valved outlet；Third check valve, including third check valve inlet and third one-way valved outlet；Proportion directional
Valve, including proportional direction valve working hole, proportional direction valve oil return opening, proportional direction valve working hole and proportional direction valve oil inlet；
Accumulator package, including accumulator package hydraulic fluid port；First pressure sensor, second pressure sensor and third pressure sensor；
Second solenoid directional control valve, including second the first working hole of solenoid directional control valve and second the second working hole of solenoid directional control valve；First ratio
Example overflow valve, including the first proportional pressure control valve oil inlet and the first proportional pressure control valve oil return opening；Second proportional pressure control valve, including
Two proportional pressure control valve oil inlets and the second proportional pressure control valve oil return opening；Loading cylinders, including big chamber and small chamber, wherein, the liquid
The press pump import connection hydraulic oil container, the hydraulic pump outlet connection the first solenoid directional control valve oil inlet, described first
The first working hole of solenoid directional control valve and the first solenoid directional control valve oil return opening connect the hydraulic oil container, first solenoid directional control valve
Second working hole connects the first solenoid directional control valve oil inlet, and first check valve inlet connects first electromagnetic switch
Valve oil inlet, first one-way valved outlet connect the accumulator package hydraulic fluid port, the proportional direction valve oil inlet and described
Second the first working hole of solenoid directional control valve, second check valve inlet connect hydraulic oil container with the third check valve inlet,
Second one-way valved outlet and the third one-way valved outlet connect the big chamber and the small chamber, the proportion directional respectively
The first working hole of valve connects the big chamber, and the proportional direction valve oil return opening connects the hydraulic oil container, the proportional direction valve
Second working hole ends, and the proportional direction valve oil inlet connects the first solenoid directional control valve oil inlet, the accumulator group
Part hydraulic fluid port connects the first working hole of the proportional direction valve oil inlet and the solenoid directional control valve, and the first pressure sensor connects
The accumulator package hydraulic fluid port is connect to detect the pressure in the accumulator package, the second pressure sensor connection is described big
For chamber to detect the pressure in the big chamber, the third pressure sensor connects the small chamber to detect the pressure in the small chamber
Power, first working hole of the second solenoid directional control valve connect first one-way valved outlet, second solenoid directional control valve second
Working hole connects the small chamber, and the first proportional pressure control valve oil inlet connects the big chamber, second proportional pressure control valve into
Hydraulic fluid port connects the small chamber, and the first proportional pressure control valve oil return opening connects the liquid with the second proportional pressure control valve oil return opening
Pressure oil case.
The wind power generating set hydraulic vane change testing stand loading hydraulic system may also include：Filter, including filter
Import and filter outlet, wherein, the filter inlet connects the hydraulic pump outlet, described in the filter outlet connection
First solenoid directional control valve oil inlet and first check valve inlet.
The wind power generating set hydraulic vane change testing stand loading hydraulic system may also include：Overflow valve, including overflow valve
Oil inlet and overflow valve oil return opening, wherein, the overflow valve oil inlet connects the first solenoid directional control valve oil inlet, described to overflow
It flows valve oil return opening and connects first the first working hole of solenoid directional control valve and the filter outlet.
The wind power generating set hydraulic vane change testing stand loading hydraulic system may also include：Motor drives the hydraulic pressure
Pump；Shut-off valve connects the hydraulic oil container and the accumulator package hydraulic fluid port.
The situation of emergency shutdown or power-down state is in wind power generating set hydraulic vane change testing stand loading hydraulic system
Under, wind power generating set hydraulic vane change testing stand loads all element dead electricity of hydraulic system, during the proportional direction valve is in
, Opening pressure is 0 after first proportional pressure control valve and the second proportional pressure control valve dead electricity, in the accumulator package
Hydraulic oil after second solenoid directional control valve and second proportional pressure control valve by flowing back to the hydraulic oil container.
In the case where wind power generating set hydraulic vane change testing stand loading hydraulic system is in shutdown status, described first
Solenoid directional control valve, the proportional direction valve, second solenoid directional control valve, first proportional pressure control valve and second ratio
It is 0 that overflow valve, which is in controllable state and Opening pressure, and the proportional direction valve is in middle position, at second solenoid directional control valve
In low level and left position is operated in, the hydraulic oil in the accumulator package passes through first proportional pressure control valve and described second
The hydraulic oil container is flowed back to after proportional pressure control valve.
In the case where wind power generating set hydraulic vane change testing stand loading hydraulic system is in standby mode, described first
Solenoid directional control valve, the proportional direction valve, second solenoid directional control valve, first proportional pressure control valve and second ratio
Overflow valve is in controllable state, and the proportional direction valve obtains maximum negative voltage and is simultaneously operated in left position, the loading cylinders it is big
Chamber communicates with the hydraulic oil container and is in quick condition, and first proportional pressure control valve and second proportional pressure control valve are opened
It is 0 to open pressure, and second solenoid directional control valve is in high level and is operated in right position, and the hydraulic pump gives the accumulator package
Pressurising when the pressure of the accumulator package reaches first predetermined value, closes the motor, and the hydraulic pump stops to accumulation of energy
Device assembly pressurising.
In the case where wind power generating set hydraulic vane change testing stand loading hydraulic system is in operating status, the ratio
Direction valve is in closed-loop control state, and the Opening pressure of first proportional pressure control valve and second proportional pressure control valve is described
The maximum working pressure (MWP) of loading cylinders, second solenoid directional control valve are in low level and are operated in left position, the accumulator group
Part is connected with the small chamber of the loading cylinders, and the opening direction for the spool for passing through the proportional direction valve and aperture size are controlled
The pressure of the big chamber of the loading cylinders is made to prevent negative pressure, the motor drives the hydraulic pump, and the hydraulic pump is given
The accumulator package pressurising when the pressure of the accumulator package reaches first predetermined value, closes the motor, works as system
When the pressure of the accumulator package is less than second predetermined value after work a period of time, start the motor, until the accumulation of energy
The pressure of device assembly reaches first predetermined value.
It is described in the case where wind power generating set hydraulic vane change testing stand loading hydraulic system is in emergency feathering state
Proportional direction valve is in closed-loop control state, and second solenoid directional control valve is in high level and is operated in right position, the accumulation of energy
Device assembly and the small chamber of the loading cylinders are not turned on, and the Opening pressure of first proportional pressure control valve is the loading cylinders
Maximum working pressure (MWP), the Opening pressure of second proportional pressure control valve are adjusted in real time, the piston rods of the loading cylinders to
Outer stretching, and the opening direction for the spool for passing through the proportional direction valve and aperture size control the big chamber of the loading cylinders
Pressure to prevent negative pressure.
Exemplary embodiment according to the present invention can provide the experimental study of wind power generating set hydraulic variable propeller system
Loading demand；Using proportional direction valve as hydraulic control component, response frequency is high, and load accurately and reliably, meets system loads
Characteristic requirements；During wind power generating set emergency feathering, the control mode that is combined using proportional direction valve and proportional pressure control valve is full
The test requirements document during emergency feathering of sufficient wind power generating set, energy structure provide load work during wind power generating set emergency feathering
Condition.
Description of the drawings
By the detailed description carried out below in conjunction with the accompanying drawings, above and other objects of the present invention and feature will become more
Add it is clear, wherein：
Fig. 1 is to show wind power generating set hydraulic vane change testing stand loading hydraulic pressure system according to an exemplary embodiment of the present invention
The schematic diagram of system.
Specific embodiment
Now, detailed description of the present invention exemplary embodiment, example represent in the accompanying drawings, wherein, identical label
Always show identical component.
Fig. 1 is to show wind power generating set hydraulic vane change testing stand loading hydraulic pressure system according to an exemplary embodiment of the present invention
The schematic diagram of system 100.
Wind power generating set hydraulic vane change testing stand loading hydraulic system 100 according to an exemplary embodiment of the present invention includes
Hydraulic oil container 1, hydraulic pump 2, motor 3, filter 4, the first solenoid directional control valve 5, overflow valve 6, the first check valve 7.1, second are single
To valve 7.2, third check valve 7.3, proportional direction valve 8, shut-off valve 9, accumulator package 10, first pressure sensor 11.1,
Two pressure sensors 11.2, third pressure sensor 11.3, the second solenoid directional control valve 12, the first proportional pressure control valve 13.1, second
Proportional pressure control valve 13.2 and loading cylinders 14.Further it should be noted that motor 3, filter 4, overflow valve 6 and shut-off valve 9 are only roots
The optional element of hydraulic system 100 is loaded according to the wind power generating set hydraulic vane change testing stand of exemplary embodiment of the present, it
Can wind power generating set hydraulic vane change testing stand according to an exemplary embodiment of the present invention load hydraulic system 100 outside
It realizes without being included in wind power generating set hydraulic vane change testing stand loading hydraulic system according to an exemplary embodiment of the present invention
In 100.
Hydraulic pump 2 includes hydraulic pressure pump inlet I and hydraulic pump outlet O, wherein, hydraulic pressure pump inlet I connections hydraulic oil container 1, liquid
Press pump outlet O connection filter inlets I.
Motor 3 drives hydraulic pump 2.
Filter 4 includes filter inlet I and filter outlet O, wherein, filter inlet I connection hydraulic pump outlet O,
Filter outlet O connects the first solenoid directional control valve oil inlet P, the first check valve inlet I and overflow valve oil inlet P, mistake respectively
Filter 4 is used to be filtered hydraulic oil.
First solenoid directional control valve 5 includes first the first working hole of solenoid directional control valve A, the first solenoid directional control valve oil return inlet T, the
One solenoid directional control valve the second working hole B and the first solenoid directional control valve oil inlet P, wherein, first the first working hole of solenoid directional control valve A
It is connect with the first solenoid directional control valve oil return inlet T with hydraulic oil container 1, first solenoid directional control valve the second working hole B is changed with the first electromagnetism
It is connected to valve oil inlet P.The flow direction of hydraulic oil that first solenoid directional control valve 5 control hydraulic pump 2 pumps out.Only as an example, first
Solenoid directional control valve 5 can be two four-way electromagnetic reversing valves.
Overflow valve 6 includes overflow valve oil inlet P and overflow valve oil return inlet T, wherein, the first electricity of overflow valve oil inlet P connection
Magnetic reversal valve oil inlet P, overflow valve oil return inlet T connect the first solenoid directional control valve the first working hole A and filter outlet O, overflow
Valve 6 controls the maximum pressure of wind power generating set hydraulic vane change testing stand loading hydraulic system 100.
First check valve 7.1 includes the first check valve inlet I and the first one-way valved outlet O, wherein, the first check valve inlet
I connection filter outlets O, the first one-way valved outlet O connection accumulator package hydraulic fluid ports O, proportional direction valve oil inlet P and the second electricity
The first working hole of magnetic reversal valve A.Hydraulic oil enters the working connection of system, the work of the first check valve 7.1 by the first check valve 7.1
With being to prevent system high pressure oil from flowing back into hydraulic pump 2, so as to be damaged to hydraulic pump 2.
Second check valve 7.2 includes the second check valve inlet I and the second one-way valved outlet O, and third check valve 7.3 includes the
Three check valve inlet I and third one-way valved outlet O, wherein, the second check valve inlet I connects hydraulic pressure with third check valve inlet I
Fuel tank 1, the second one-way valved outlet O and third one-way valved outlet O connect the big chamber of loading cylinders 14 and small chamber respectively, and second is unidirectional
Valve 7.2 and third check valve 7.3 can prevent load oil when vacuum occur in the big chamber of loading cylinders 14 and small chamber to its repairing
There is vacuum in cylinder 14.
Proportional direction valve 8 includes the first working hole of proportional direction valve A, proportional direction valve oil return inlet T, proportional direction valve second
Working hole B and proportional direction valve oil inlet P, wherein, the big chamber of proportional direction valve the first working hole A connections loading cylinders 14, than
Proportional direction valve oil return inlet T connects hydraulic oil container 1, the second working hole of proportional direction valve B cut-offs.Proportional direction valve 8 is by controller control
System, controller control the opening direction and size of 8 spool of proportional direction valve, and then the load of control system as needed.
Here, controller is not shown in Fig. 1, and may not include and becomes in wind power generating set hydraulic pressure according to an exemplary embodiment of the present invention
In paddle testing stand loading hydraulic system 100, and realized by peripheral control unit.Only as an example, proportional direction valve 8 can be three
Four-way proportional direction valve.
Shut-off valve 9 connects hydraulic oil container 1 and accumulator package hydraulic fluid port O, shut-off valve 9 are closed when flat, opens to put when safeguarding
Fall the high pressure liquid pressure oil in accumulator package 10.
Accumulator package 10 includes accumulator package hydraulic fluid port O, accumulator package hydraulic fluid port O connection proportional direction valve oil inlet Ps
With solenoid directional control valve the first working hole A, give proportional direction valve 8 and solenoid directional control valve 12 fuel feeding.Accumulator package 10 is by several
Accumulator composition, a constant pressure source is equivalent to, required flow and pressure are provided for system.
First pressure sensor 11.1 connects accumulator package hydraulic fluid port O, detects the pressure of hydraulic oil in accumulator package 10,
And detection signal is sent to controller.Second pressure sensor 11.2 and third pressure sensor 11.3 connect load oil respectively
The big chamber and small chamber of cylinder 14, and the big chamber of loading cylinders 14 and the operating pressure of small chamber are detected, and detection signal is sent to control
Device processed.
Second solenoid directional control valve 12 includes second solenoid directional control valve the first working hole A and the second solenoid directional control valve second works
Mouth B, wherein, second solenoid directional control valve the first working hole A connection the first one-way valved outlet O, the second solenoid directional control valve second works
The small chamber of mouth B connections loading cylinders 14, controller control the work oil level of the second solenoid directional control valve 12.Only as an example, second
Solenoid directional control valve 12 can be 2/2-way solenoid directional control valve.
First proportional pressure control valve 13.1 includes the first proportional pressure control valve oil inlet P and the first proportional pressure control valve oil return inlet T, the
Two proportional pressure control valves 13.2 include the second proportional pressure control valve oil inlet P and the second proportional pressure control valve oil return inlet T, wherein, the first ratio
Example overflow valve oil inlet P and the second proportional pressure control valve oil inlet P respectively connected the big chamber of loading cylinders 14 and small chamber, the first ratio
Example overflow valve oil return inlet T connects hydraulic oil container 1 with the second proportional pressure control valve oil return inlet T.Controller is according to different working conditions
Different signals is sent to control the oil pressure relief of the first proportional pressure control valve 13.1 and the second proportional pressure control valve 13.2, the first ratio
The oil pressure relief of 13.1 and second proportional pressure control valve 13.2 of overflow valve determines the highest work pressure of 14 big chamber of loading cylinders and small chamber
Power.
Wind power generating set hydraulic vane change testing stand loading hydraulic system 100 according to an exemplary embodiment of the present invention, which is divided, is
Following several working conditions：Emergency shutdown or power-down state, shutdown status, standby mode, operating status and emergency feathering state.
At wind power generating set hydraulic vane change testing stand according to an exemplary embodiment of the present invention loading hydraulic system 100
In the case of emergency shutdown or power-down state, wind power generating set hydraulic vane change experiment according to an exemplary embodiment of the present invention
Platform loads all element dead electricity of hydraulic system 100, and proportional direction valve 8 is in middle position, the first proportional pressure control valve 13.1 and second
Opening pressure is 0 after 13.2 dead electricity of proportional pressure control valve, and the hydraulic oil in accumulator package 10 passes through 12 He of the second solenoid directional control valve
Fuel tank 1 is flowed back to after second proportional pressure control valve 13.2.
At wind power generating set hydraulic vane change testing stand according to an exemplary embodiment of the present invention loading hydraulic system 100
In the case of shutdown status, all electro hydraulic valves are (that is, the first solenoid directional control valve 5, proportional direction valve 8, the second electromagnetic switch
Valve 12, the first proportional pressure control valve 13.1 and the second proportional pressure control valve 13.2) in controllable state, proportional direction valve 8 is in middle position,
Second solenoid directional control valve 12 is in low level, is operated in left position, the first proportional pressure control valve 13.1 and the second proportional pressure control valve 13.2
Opening pressure is 0, and the hydraulic oil in accumulator package 10 passes through the first proportional pressure control valve 13.1 and the second proportional pressure control valve 13.2
After flow back to fuel tank 1.
At wind power generating set hydraulic vane change testing stand according to an exemplary embodiment of the present invention loading hydraulic system 100
In the case of standby mode, all electro hydraulic valves are (that is, the first solenoid directional control valve 5, proportional direction valve 8, the second electromagnetic switch
Valve 12, the first proportional pressure control valve 13.1 and the second proportional pressure control valve 13.2) in controllable state, proportional direction valve 8 obtains maximum
Negative voltage is operated in left position, and 14 big chamber of loading cylinders is communicated with fuel tank 1, and 13.1 and 13.2 Opening pressure of proportional pressure control valve is 0,
Loading cylinders 14 are in quick condition.Second solenoid directional control valve 12 is in high level, is operated in right position.Hydraulic pump 2 gives accumulator
10 pressurising of component is until reaching first predetermined value (only as an example, not a limit, such as, 270bar), controller control motor 3
It is stopped, hydraulic pump 2 stops giving accumulator package 10 pressurising.
At wind power generating set hydraulic vane change testing stand according to an exemplary embodiment of the present invention loading hydraulic system 100
In the case of operating status, proportional direction valve 8 is in closed-loop control state, and the first proportional pressure control valve 13.1 and the second ratio are overflow
Flow the maximum working pressure (MWP) for setting Opening pressure and being set as loading cylinders 14 of valve 13.2.Second solenoid directional control valve 12 is in low electricity
It is flat, be operated in left position, accumulator package 10 is connected with the small chamber of loading cylinders 14, the small cavity pressures of loading cylinders 14 always with storage
Energy 10 pressure of device assembly is consistent.Second pressure sensor 11.2 and third pressure sensor 11.3 detect loading cylinders 14 in real time
The pressure of big chamber and small chamber, and the signal of detection is sent to controller, controller is as desired by control proportional direction valve 8
Spool opening direction and aperture size control the pressure of the big chamber of loading cylinders 14, so as to which loading cylinders 14 can be according to big
The pressure differential of chamber and small chamber carrys out the required load of output system, realizes hydraulic system loading.In addition, motor 3 drives hydraulic pump 2
Work, hydraulic pump 2 is oil-filled to accumulator package 10, when the pressure of accumulator package 10 reaches first predetermined value (only as example
And it is unrestricted, such as, 270bar) when, controller receives the detection signal of first pressure sensor 11.1, closes motor 3, when
After system work a period of time (only as an example, not a limit, such as, the pressure of accumulator package 10 is less than second predetermined value
When 240bar), controller receives the detection signal of first pressure sensor 11.1, starts motor 3, until accumulator package 10
Pressure reach first predetermined value.
At wind power generating set hydraulic vane change testing stand according to an exemplary embodiment of the present invention loading hydraulic system 100
In the case of emergency feathering state, proportional direction valve 8 is in closed-loop control state, and the second solenoid directional control valve 12 is in high electricity
It is flat, it is operated in right position, the conducting of cut-out accumulator package 10 and the small chamber of loading cylinders 14.First proportional pressure control valve 13.1 is set
It is the maximum working pressure (MWP) that loading cylinders 14 are set to determine Opening pressure, and the setting Opening pressure of the second proportional pressure control valve 13.2 is by controlling
Device processed adjusts in real time as needed, and the piston rod of loading cylinders 14 is protruding, controller control proportional direction valve 8 aperture with
Big chamber for loading cylinders 14 provides the hydraulic oil of needs, prevents the big chamber of loading cylinders 14 from negative pressure occur.
Exemplary embodiment according to the present invention can provide the experimental study of wind power generating set hydraulic variable propeller system
Loading demand；Using proportional direction valve as hydraulic control component, response frequency is high, and load accurately and reliably, meets system loads
Characteristic requirements；During wind power generating set emergency feathering, the control mode that is combined using proportional direction valve and proportional pressure control valve is full
The test requirements document during emergency feathering of sufficient wind power generating set, energy structure provide load work during wind power generating set emergency feathering
Condition.
Although the present invention has shown and described with reference to certain exemplary embodiments, those skilled in the art will
Understand, shape can be made in the case where not departing from the spirit and scope of the present invention that range limits by claim and its equivalent
Various changes in formula and details.
Claims (9)
1. a kind of wind power generating set hydraulic vane change testing stand loads hydraulic system, including：
Hydraulic oil container (1)；
Hydraulic pump (2), including hydraulic pressure pump inlet (I) and hydraulic pump outlet (O)；
First check valve (7.1), including the first check valve inlet (I) and the first one-way valved outlet (O)；
Proportional direction valve (8), including the first working hole of proportional direction valve (A), proportional direction valve oil return opening (T), proportional direction valve
Second working hole (B) and proportional direction valve oil inlet (P)；
Accumulator package (10), including accumulator package hydraulic fluid port (O)；
Second pressure sensor (11.2) and third pressure sensor (11.3)；
Loading cylinders (14), including big chamber and small chamber,
Wherein, the hydraulic pressure pump inlet (I) connects the hydraulic oil container (1),
First one-way valved outlet (O) connects the accumulator package hydraulic fluid port (O),
First working hole of proportional direction valve (A) connects the big chamber, and the proportional direction valve oil return opening (T) connects the liquid
Pressure oil case (1),
The accumulator package hydraulic fluid port (O) connects the proportional direction valve oil inlet (P),
The second pressure sensor (11.2) connects the big chamber to detect the pressure in the big chamber, and the third pressure passes
Sensor (11.3) connects the small chamber to detect the pressure in the small chamber,
It is characterized in that, the wind power generating set hydraulic vane change testing stand loading hydraulic system further includes：
First solenoid directional control valve (5), including first the first working hole of solenoid directional control valve (A), the first solenoid directional control valve oil return opening
(T), first the second working hole of solenoid directional control valve (B) and the first solenoid directional control valve oil inlet (P)；
Second check valve (7.2), including the second check valve inlet (I) and the second one-way valved outlet (O)；
Third check valve (7.3), including third check valve inlet (I) and third one-way valved outlet (O)；
First pressure sensor (11.1)；Second solenoid directional control valve (12), including second the first working hole of solenoid directional control valve (A) and
Second the second working hole of solenoid directional control valve (B)；
First proportional pressure control valve (13.1), including the first proportional pressure control valve oil inlet (P) and the first proportional pressure control valve oil return opening
(T)；
Second proportional pressure control valve (13.2), including the second proportional pressure control valve oil inlet (P) and the second proportional pressure control valve oil return opening
(T)；
Wherein, the hydraulic pump outlet (O) connects the first solenoid directional control valve oil inlet (P),
First solenoid directional control valve, first working hole (A) and the first solenoid directional control valve oil return opening (T) connect the hydraulic oil container
(1), second working hole of the first solenoid directional control valve (B) connects the first solenoid directional control valve oil inlet (P),
First check valve inlet (I) connects the first solenoid directional control valve oil inlet (P), the proportional direction valve oil inlet
(P) first working hole of the second solenoid directional control valve (A), second check valve inlet (I) and the third check valve are connected
Import (I) connection hydraulic oil container (1), second one-way valved outlet (O) and the third one-way valved outlet (O) connect institute respectively
Big chamber and the small chamber are stated,
The second working hole of proportional direction valve (B) cut-off, the proportional direction valve oil inlet (P) connect first electromagnetism and change
To valve oil inlet (P), the accumulator package hydraulic fluid port (O) connects first working hole of the second solenoid directional control valve (A), and described the
One pressure sensor (11.1) connects the accumulator package hydraulic fluid port (O) to detect the pressure in the accumulator package (10),
Second solenoid directional control valve, first working hole (A) connects first one-way valved outlet (O), second electromagnetic switch
The second working hole of valve (B) connects the small chamber,
The first proportional pressure control valve oil inlet (P) connects the big chamber, and the second proportional pressure control valve oil inlet (P) connects institute
Small chamber is stated, the first proportional pressure control valve oil return opening (T) and the second proportional pressure control valve oil return opening (T) connect the hydraulic oil
Case (1).
2. wind power generating set hydraulic vane change testing stand as described in claim 1 loads hydraulic system, further include：Filter
(4), including filter inlet (I) and filter outlet (O), wherein, the filter inlet (I) connects the hydraulic pump outlet
(O), the filter outlet (O) connects the first solenoid directional control valve oil inlet (P) and first check valve inlet (I).
3. wind power generating set hydraulic vane change testing stand as claimed in claim 2 loads hydraulic system, further include：Overflow valve
(6), including overflow valve oil inlet (P) and overflow valve oil return opening (T), wherein, overflow valve oil inlet (P) connection described first
Solenoid directional control valve oil inlet (P), the overflow valve oil return opening (T) connect first working hole of the first solenoid directional control valve (A) and
The filter outlet (O).
4. the wind power generating set hydraulic vane change testing stand loading hydraulic system as described in any one of claim 1-3, is also wrapped
It includes：
Motor (3) drives the hydraulic pump (2)；
Shut-off valve (9) connects the hydraulic oil container (1) and the accumulator package hydraulic fluid port (O).
5. wind power generating set hydraulic vane change testing stand as claimed in claim 4 loads hydraulic system, wherein, in wind-power electricity generation
In the case that unit hydraulic vane change testing stand loading hydraulic system is in emergency shutdown or power-down state, wind power generating set hydraulic pressure
Variable pitch testing stand loads all element dead electricity of hydraulic system, and the proportional direction valve (8) is overflow in middle position, first ratio
Opening pressure is 0 after flowing valve (13.1) and second proportional pressure control valve (13.2) dead electricity, in the accumulator package (10)
Hydraulic oil after second solenoid directional control valve (12) and second proportional pressure control valve (13.2) by flowing back to the hydraulic oil container
(1)。
6. wind power generating set hydraulic vane change testing stand as claimed in claim 4 loads hydraulic system, wherein, in wind-power electricity generation
It is first solenoid directional control valve (5), described in the case that unit hydraulic vane change testing stand loading hydraulic system is in shutdown status
Proportional direction valve (8), second solenoid directional control valve (12), first proportional pressure control valve (13.1) and second ratio are overflow
It is 0 to flow valve (13.2) in controllable state and Opening pressure, and the proportional direction valve (8) is in middle position, second electromagnetism
Reversal valve (12) is in low level and is operated in left position, and the hydraulic oil in the accumulator package (10) passes through first ratio
The hydraulic oil container (1) is flowed back to after overflow valve (13.1) and second proportional pressure control valve (13.2).
7. wind power generating set hydraulic vane change testing stand as claimed in claim 4 loads hydraulic system, wherein, in wind-power electricity generation
It is first solenoid directional control valve (5), described in the case that unit hydraulic vane change testing stand loading hydraulic system is in standby mode
Proportional direction valve (8), second solenoid directional control valve (12), first proportional pressure control valve (13.1) and second ratio are overflow
Flow valve (13.2) in controllable state, the proportional direction valve (8) obtains maximum negative voltage and is simultaneously operated in left position, the big chamber with
The hydraulic oil container (1) communicates and in quick condition, first proportional pressure control valve (13.1) and second proportional overflow
The Opening pressure of valve (13.2) is 0, and second solenoid directional control valve (12) is in high level and is operated in right position, the hydraulic pump
(2) accumulator package (10) pressurising is given, when the pressure of the accumulator package (10) reaches first predetermined value, closes institute
Motor (3) is stated, the hydraulic pump (2) stops giving accumulator package (10) pressurising.
8. wind power generating set hydraulic vane change testing stand as claimed in claim 4 loads hydraulic system, wherein, in wind-power electricity generation
In the case that unit hydraulic vane change testing stand loading hydraulic system is in operating status, the proportional direction valve (8) is in closed loop
The Opening pressure of state of a control, first proportional pressure control valve (13.1) and second proportional pressure control valve (13.2) is described negative
The maximum working pressure (MWP) of oil cylinder (14) is carried, second solenoid directional control valve (12) is in low level and is operated in left position, the storage
Energy device assembly (10) is connected, and the opening direction of spool and aperture size for passing through the proportional direction valve (8) with the small chamber
The pressure of the big chamber is controlled to prevent negative pressure, the motor (3) drives the hydraulic pump (2), the hydraulic pump (2)
The accumulator package (10) pressurising is given, when the pressure of the accumulator package (10) reaches first predetermined value, described in closing
Motor (3), when the pressure of the accumulator package (10) after system works a period of time is less than second predetermined value, described in startup
Motor (3), until the pressure of the accumulator package (10) reaches first predetermined value.
9. wind power generating set hydraulic vane change testing stand as claimed in claim 4 loads hydraulic system, wherein, in wind-power electricity generation
In the case that unit hydraulic vane change testing stand loading hydraulic system is in emergency feathering state, the proportional direction valve (8) is in
Closed-loop control state, second solenoid directional control valve (12) is in high level and is operated in right position, the accumulator package (10)
It is not turned on the small chamber, the Opening pressure of first proportional pressure control valve (13.1) is the maximum work of the loading cylinders (14)
Make pressure, the Opening pressure of second proportional pressure control valve (13.2) is adjusted in real time, the piston of the loading cylinders (14)
Bar is protruding, and the opening direction for the spool for passing through the proportional direction valve (8) and aperture size control the big chamber
Pressure is to prevent negative pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257218.0A CN106704275B (en) | 2016-12-30 | 2016-12-30 | Hydraulic loading system of hydraulic pitch control test bed of wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257218.0A CN106704275B (en) | 2016-12-30 | 2016-12-30 | Hydraulic loading system of hydraulic pitch control test bed of wind generating set |
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| CN106704275B true CN106704275B (en) | 2018-07-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109915426A (en) * | 2019-03-18 | 2019-06-21 | 广东工业大学 | A kind of hydraulic loading device |
| CN114109927A (en) * | 2021-02-04 | 2022-03-01 | 上海圣克赛斯液压股份有限公司 | Hydraulic variable pitch system for proportional servo control of wind driven generator |
| CN114151396A (en) * | 2021-12-10 | 2022-03-08 | 上海电气液压气动有限公司 | Fan main bearing stress hydraulic system |
| CN114321045A (en) * | 2022-01-11 | 2022-04-12 | 徐州徐工道金特种机器人技术有限公司 | Weight reduction control valve, hydraulic control system using weight reduction control valve and mine sweeping vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102705169B (en) * | 2012-06-26 | 2014-05-07 | 河海大学 | Model machine for monitoring and controlling operation state of wind power generation |
| CN103148032B (en) * | 2013-03-26 | 2016-01-20 | 河海大学常州校区 | A kind of Study of Cyclic Loading hydraulic system |
| KR20160129391A (en) * | 2015-04-30 | 2016-11-09 | 주식회사 동신이엔텍 | Servo hybrid actuator system for pitch or yaw bearing tester |
| CN205298148U (en) * | 2016-01-20 | 2016-06-08 | 山东科技大学 | Servo pneumatic cylinder test bench |
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