CN105545846B - Three-pin locking hydraulic system for draught fan impeller - Google Patents
Three-pin locking hydraulic system for draught fan impeller Download PDFInfo
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- CN105545846B CN105545846B CN201610096300.3A CN201610096300A CN105545846B CN 105545846 B CN105545846 B CN 105545846B CN 201610096300 A CN201610096300 A CN 201610096300A CN 105545846 B CN105545846 B CN 105545846B
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- hydraulic cylinder
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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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a three-pin locking hydraulic system for a draught fan impeller, which is suitable for draught fan impeller locking. The three-pin locking hydraulic system comprises a first working group and a second working group; the first working group comprises a first oil supply oil line and a first oil return oil line, the first oil supply oil line and the first oil return oil line are connected with a first hydraulic cylinder through a first control valve, and the hydraulic cylinder is connected with a two-way locking pin; the second working group comprises a second oil supply oil line and a second oil return oil line, the second oil supply oil line and the second oil return oil line are in parallel connection with a second hydraulic cylinder and a third hydraulic cylinder through a second control valve, and the two hydraulic cylinders are respectively connected with a one-way locking pin I and a one-way locking pin II; and a pressure relief valve and a one-way valve are arranged in parallel on the second oil supply oil line. The draught fan impeller three-pin locking hydraulic system can obtain a successive control strategy for the plurality of hydraulic cylinders through the two working groups; at the same time, the plurality of hydraulic cylinders are arranged in parallel under one same control valve, so that synchronization action of a plurality of cylinder bodies in the same group can be realized.
Description
Technical field
The present invention relates to hydraulic-driven technical field, more particularly to a kind of multi-cylinder linkage formula, it is adaptable to high-power wind
The fixed hydraulic system of the lock of generating set impeller three.
Background technology
Hydraulic technique is generally used for heavy, large-scale, large equipment, and hydraulic pressure drive control system is that Jing is commonly used in industry
A kind of control mode, it is become using some loop organic assemblings and completes the drive system of certain control function to complete energy
Transmission, conversion and control.
Because the motility of hydraulic pressure drive control system mode and convenience, hydraulic control industrially obtain it is extensive pay attention to and
Using.Such as in wind power generation field, the braking of generating set impeller can just enable hydraulic control.Hydraulic control system can be with
The technologies such as intelligent control technology, Computer Control Technology combine, and this makes it possible to be played a role in more occasions,
Can more exquisite, more neatly complete expected control task.
Such as, wind-driven generator is a kind of equipment for converting wind energy into electric energy, is being carried out when impeller is assembled and after assembling
When various devices in impeller carry out maintaining, attendant is before into impeller, it is necessary to first locked in impeller, makes
It can not rotate, to guarantee staff's life security.Some blower fans, when single blade lifting is carried out, and single blade is changed
When, it is also desirable to impeller is locked using stop pin.For the locking of impeller, typically by the lock that will be arranged on pedestal
Rationed marketing is inserted in the lock hole on impeller to realize, the swapping process of stop pin, and hydraulic control system just can be used completely
To drive.
For low power wind driven generator, the maintenance load of impeller generally can be just undertaken with a stop pin.But for
The large-scale wind driven generator load to be undertaken is very big, it usually needs realize that impeller is locked using two or more stop pins.
In the case of this, if manipulating stop pin using hydraulic control system, each locking just must be controlled with rational hydraulic circuit
Pin, completes the sequential working of two or more stop pins.
The content of the invention
Work requirements of the present invention for the locking of above-mentioned impeller, there is provided a kind of lock of draught fan impeller three determines hydraulic system.This
Hydraulic system connects three hydraulic cylinders, and a stop pin is connected on each hydraulic cylinder piston rod, under the control action of hydraulic system,
The action of each hydraulic cylinder is manipulated respectively, realizes the purpose that the stop pin that each hydraulic cylinder is carried works in order.
The purpose of the present invention is mainly achieved through the following technical solutions：A kind of lock of draught fan impeller three determines hydraulic pressure system
System, including the first working group and the second working group, first working group includes the first oil feeding line, the first oil return circuit, institute
State the first oil feeding line and first oil return circuit to be connected with first hydraulic cylinder through the first control valve, the first hydraulic cylinder
Piston rod connection reversible lock rationed marketing；
Second working group includes the second oil feeding line, the second oil return circuit, second oil feeding line and described the
Two oil return circuits are connected in parallel second hydraulic cylinder and the 3rd hydraulic cylinder through the second control valve, the second hydraulic cylinder, described the
The piston rod of three hydraulic cylinders connects respectively one-way lock rationed marketing one and one-way lock rationed marketing two；And it is in parallel on second oil feeding line
One air relief valve and a check valve are set, and the check valve is led in second hydraulic cylinder and the 3rd hydraulic cylinder rodless cavity backflow direction
It is logical.
Further, first oil feeding line is connected with the rodless cavity of the first hydraulic cylinder, the first oil return oil
Road connects with the rod chamber of the first hydraulic cylinder.
Further, second oil feeding line is connected with the rodless cavity of the second hydraulic cylinder, the 3rd hydraulic cylinder simultaneously,
Second oil return circuit is connected with the rod chamber of the second hydraulic cylinder, the 3rd hydraulic cylinder simultaneously.
Further, described first control valve and described second and control valve for three-position four-way electromagnetic directional valve.
Yet further, described first valve is controlled for O-shaped three-position four-way electromagnetic directional valve, described second control valve be p-type
Three-position four-way electromagnetic directional valve.
The P mouths of the O-shaped three-position four-way electromagnetic directional valve are connected with the oil inlet end of first oil feeding line, R mouths and institute
The oil revolving end connection of the first oil return circuit is stated, A mouths are connected with the rodless cavity of first hydraulic cylinder, and B mouths have bar with first hydraulic cylinder
Chamber connects；The P mouths of the p-type three-position four-way electromagnetic directional valve are connected with the oil inlet end of second oil feeding line, R mouths with it is described
The oil revolving end connection of the second oil return circuit, A mouths are connected with the rodless cavity of the second hydraulic cylinder, the 3rd hydraulic cylinder simultaneously, and B mouths are same
When connect with the rod chamber of the second hydraulic cylinder, the 3rd hydraulic cylinder.
Further, the air relief valve is arranged on the A mouths and second hydraulic pressure of the p-type three-position four-way electromagnetic directional valve
On second oil feeding line between cylinder and the 3rd hydraulic cylinder.
Further, it is respectively provided with piston rod position on the first hydraulic cylinder, second hydraulic cylinder, the 3rd hydraulic cylinder to open
Close；One electric-control system, electricly connects each position switch and the first control valve, the second control valve.
Further, first oil feeding line and second oil feeding line are connected with a main oil feeding line jointly, institute
State main oil feeding line Jing drive components to be connected with fuel tank；First oil return circuit and second oil return circuit are led with one simultaneously
Oil return circuit is connected, and the main oil return circuit is connected with the fuel tank.
Again the drive component includes hydraulic pump and motor, the hydraulic pump and the electronic mechatronics, the liquid
The oil-in of press pump is connected with the fuel tank, and the oil-out of the hydraulic pump is connected with the main oil feeding line.
Yet further, protection branch road, protection are connected between the main oil feeding line and the main oil return circuit
One safety overflow valve is set on road.
The present invention passes through control of the electric-control system to solenoid electric valve, it is possible to achieve reversible lock rationed marketing and one-way lock rationed marketing have
The action that sequence is stretched out and return.
The beneficial effects are mainly as follows：Because hydraulic drive has：1) inertia force is little, when overload or parking
Big impact will not occur, 2) can in given range smoothly adjust automatically hauling speed, and be capable of achieving stepless time adjustment, 3) change
The advantages of to easy, 4) operational control simplicity, high degree of automation, so being particularly well-suited to the control of impeller stop pin.
So the present invention is by the rational deployment to hydraulic system, a kind of coordinated signals loop of multi-hydraulic-cylinder is obtained,
In the hydraulic system, by being arranged in parallel for two control valves, it is possible to obtain two control valves successively control two groups of hydraulic cylinders
Strategy, and by it is same control valve control under be arranged in parallel multiple hydraulic cylinders, it is possible to achieve with multiple liquid in group
The synchronization action of multiple stop pins that cylinder pressure drives.
Further, since in the oil circuit of same control valve, will be connected in parallel with the multiple hydraulic cylinders of group, rod chamber and nothing
Rod cavity is each communicated with again, and by arranging air relief valve and check valve, forms differential mode, it is possible to accelerate the fortune of stop pin
Scanning frequency degree, and save energy.
So the present invention is especially suitable for the occasion of multiple stop pins work simultaneously, especially requires that multiple stop pins both had
There is the poor sequence action occasion with synchronization action again, the such as lock of draught fan impeller three determines occasion.
Other features and advantages of the present invention will illustrate in the following description, part become from description it is aobvious and
It is clear to, or is understood by implementing the present invention.
Description of the drawings
Accompanying drawing is only used for illustrating the purpose of specific embodiment, and is not considered as limitation of the present invention, in whole accompanying drawing
In, identical reference markss represent identical part.
Fig. 1 is the lock fixed structure schematic diagram of draught fan impeller three.
Fig. 2 is the schematic diagram that the lock of draught fan impeller of the present invention three determines hydraulic system embodiment.
In figure, 1- fuel tanks, 2- hydraulic pumps, 3- motor, 4- safety overflow valves, 10- reversible lock rationed marketings, 20- monodirectional lockings
Pin one, 30- one-way locks rationed marketing two, 11- first hydraulic cylinders, 12- second hydraulic cylinders, the hydraulic cylinders of 13- the 3rd, the main fuel feeding oil of 100-
Road, the main oil return circuits of 200-, the oil feeding lines of 101- first, the oil return circuits of 102- first, the control valves of 103- first, 201- second is supplied
Oil circuit, the oil return circuits of 202- second, the control valves of 203- second, 204- air relief valve, 205- check valves.
Specific embodiment
Below in conjunction with the accompanying drawings specifically describing the preferred embodiments of the present invention, wherein, accompanying drawing constitutes the application part, and
It is used to together with embodiments of the present invention explain the principle of the present invention.
As shown in figure 1, for this mode that impeller is locked using stop pin, find through many experiments, when using
During three stop pin locking impellers, if all using reversible lock rationed marketing 10, (stop pin can two rotations suitable, counterclockwise to impeller
All play restriction effect in direction), be no doubt, but because stop pin need to fit with lock hole both sides, so can be non-when installing
Often compact, circular gap does not almost have, simultaneously because the inevitable property of manufacturing and positioning errors, will be difficult will be all two-way
Stop pin can centering, be inserted in lock hole.Therefore it is proposed that a reversible lock rationed marketing and two one-way lock rationed marketings：It is single
To stop pin 1, one-way lock rationed marketing 2 30 (only to one direction of rotation of impeller rise restriction effect) with the use of mode, this
Facility is brought to installation.But just because of there is the presence of one-way lock rationed marketing, it can only be limited the single direction of rotation of impeller
It is fixed, so, first reversible lock rationed marketing must be inserted in lock hole during installation, it is ensured that impeller it is basicly stable, then could be by
One-way lock rationed marketing is inserted successively, so just can guarantee that all stop pins can be installed into, and can be played a role；In the same manner, exist
Then can be just that reversible lock rationed marketing is exited when exiting, it is necessary to be first to exit one-way lock rationed marketing.Under such conditions, if adopted
Stop pin is manipulated with hydraulic control system, just the job order of each stop pin of necessary reasonable arrangement, can just complete multiple lockings
The sequential working of pin.
Therefore, as shown in Fig. 2 the embodiment of the present invention provides a kind of lock of draught fan impeller three determines hydraulic system, including two groups
Working group, referred to as the first working group and the second working group.Wherein the first working group composition structure include first hydraulic cylinder 11, the
One oil feeding line 101, the first oil return circuit 102, the first oil feeding line 101 is connected with the rodless cavity of first hydraulic cylinder 11, and first
Oil return circuit 102 is connected with the rod chamber of first hydraulic cylinder 11, and the piston rod of first hydraulic cylinder 11 is connected with reversible lock rationed marketing 10.
Also include the first control valve 103 in first working group, the first oil feeding line 101 and the first oil return circuit 102 all lead to
Cross the first control valve 103 to be connected with the control of first hydraulic cylinder 11.First control valve 103 is mounted connected to the first fuel feeding simultaneously by interface
On the oil return circuit 102 of oil circuit 101 and first.
In the present embodiment preferably, the first control valve 103 is a proportional reversing valve, and it is used to control the flow direction of hydraulic oil.
More specifically, the first control valve 103 adopts O-shaped three-position four-way electromagnetic directional valve, and it has P mouths, R mouths, A mouths and B mouths.P mouths
Pressure oil oil-in is represented, R represents the oil return opening of logical fuel tank or oil pump, and A, B represent the actuators such as logical hydraulic cylinder or oil motor
Actuator port, so, P mouths are connected with the oil inlet end of the first oil feeding line 101, the oil revolving end of R mouths and the first oil return circuit 102
Connection, A mouths are connected by the first oil feeding line 101 with the rodless cavity of first hydraulic cylinder 11, and B mouths pass through the first oil return circuit 102
Connect with the rod chamber of first hydraulic cylinder 11.Because the first control valve 103 is solenoid directional control valve, thus it can more easily be controlled
Station conversion processed, using convenient.Certainly, first control valve 103 be not limited to this, its can be it is any can realize commutation
Valve or valve group.
Press the working condition of hydraulic cylinder, the first control valve 103 has and stretches out, returns and standby three kinds of stations.First control
After valve 103 switches on power, electric-control system first allows the electric magnet b1 of the first control valve 103 to obtain electric (now a1 power-off), makes the P mouths of valve
Connect with A mouths, R mouths are connected with B mouths, hydraulic oil enters the rodless cavity of first hydraulic cylinder 11, piston rod stretches out, drive Bidirectional locking
Pin 10 stretches out, and the hydraulic oil in the rod chamber of first hydraulic cylinder 11 is flowed back in fuel tank 1.After reversible lock rationed marketing 10 is stretched out in place, the
Electric magnet b1, a1 all power-off of one control valve 103, the P mouths and A mouths of valve, R mouths and B mouths disconnect, and the first control valve 103 is in
Standby station.When electric-control system restarts the electric magnet a1 of the first control valve 103 and obtains electric, the P mouths of valve are connected with B mouths, R mouths and A
Mouth connection, hydraulic oil enters the rod chamber of first hydraulic cylinder 11, and piston rod is retracted, and drives reversible lock rationed marketing 10 to return, the first liquid
Hydraulic oil in the rodless cavity of cylinder pressure 11 is flow back in fuel tank 1.
Second working group is similar to the first work group portion structure but also variant, wraps in the composition structure of the second working group
Include two hydraulic cylinders：Second hydraulic cylinder 12, the 3rd hydraulic cylinder 13, and the second oil feeding line 201, the second oil return circuit 202, the
Two hydraulic cylinders 12, the 3rd hydraulic cylinder 13 are all connected on the second oil feeding line 201 and the second oil return circuit 202.Wherein the second liquid
Cylinder pressure 12, the rodless cavity of the 3rd hydraulic cylinder 13 connect with the second oil feeding line 201, second hydraulic cylinder 12, the 3rd hydraulic cylinder 13
Rod chamber is connected with the second oil return circuit 202.The piston rod of second hydraulic cylinder 12 is connected with one-way lock rationed marketing 1, the 3rd hydraulic pressure
The piston rod of cylinder 13 is connected with one-way lock rationed marketing 2 30.
Further, one second control valve 203, the second oil feeding line 201 and the second oil return are also included in the second working group
Oil circuit 202 is connected with the control of second hydraulic cylinder 12, the 3rd hydraulic cylinder 13 by the second control valve 203.Second control valve
203 are mounted connected on the second oil feeding line 201 and the second oil return circuit 202 simultaneously by its interface.In the present invention, it is preferable that the
Two control valves 203 are a proportional control valve, and it is also the flow direction for controlling hydraulic oil.More specifically, the second control valve 203
Using p-type three-position four-way electromagnetic directional valve, it has the oil inlet end of P mouths, R mouths, A mouths and B mouths, P mouths and the second oil feeding line 201
Connection, R mouths are connected with the oil revolving end of the second oil return circuit 202, and A mouths are by the second oil feeding line 201 while and second hydraulic cylinder
The rodless cavity connection of 12 rodless cavity, the 3rd hydraulic cylinder 13, B mouths by the second oil return circuit 202 simultaneously with second hydraulic cylinder 12
Rod chamber, the 3rd hydraulic cylinder 13 rod chamber connection.So, second hydraulic cylinder 12, the rodless cavity of the 3rd hydraulic cylinder 13 are simultaneously
Connection, second hydraulic cylinder 12, the rod chamber of the 3rd hydraulic cylinder 13 are also in parallel, namely the hydraulic cylinder of second hydraulic cylinder 12 and the 3rd
13 are connected in parallel between the second oil feeding line 201 and the second oil return circuit 202.Because the second control valve 203 is electromagnetism
Reversal valve, thus it can more easily control station conversion, using convenient.Certainly, the second control valve 203 is not limited to
This, it can be any valve that can realize commutating or valve group.
Further, an air relief valve 204 is also included in the second working group, air relief valve 204 is arranged on the second control valve 203
On the second oil feeding line 201 between A mouths and second, third hydraulic cylinder, for protecting the pressure on the second oil feeding line 201,
The pressure in the rodless cavity of the hydraulic cylinder 13 of second hydraulic cylinder 12 and the 3rd is namely protected, avoids stop pin excessive in pressure with this
In the case of stretch out excess.Also, in order to realize second hydraulic cylinder 12, the 3rd hydraulic cylinder 13 in the case where air relief valve 204 disconnects
Rodless cavity in oil can be back in fuel tank 1, one is arranged in parallel with air relief valve 204 also on the second oil feeding line 201 single
To valve 205.
According to the working condition of hydraulic cylinder, second control valve 203 also have stretch out, return and standby three kinds of stations.Second
After control valve 203 switches on power, electric-control system first allows the electric magnet b2 of the second control valve 203 to obtain electric (now a2 power-off), and second
Control valve 203 is in and stretches out station.The P mouths of the second control valve 203 are connected with A mouths, B mouths, and hydraulic oil enters the second hydraulic pressure simultaneously
The rodless cavity and rod chamber of the hydraulic cylinder 13 of cylinder 12 and the 3rd, but now because rodless cavity is little, rod chamber is big, so rodless cavity
Oil pressure ratio rod chamber is big, and the piston rod of the hydraulic cylinder 13 of second hydraulic cylinder 12 and the 3rd all stretches out, while driving one-way lock rationed marketing one
20th, one-way lock rationed marketing 2 30 is stretched out；Piston rod with the hydraulic cylinder 13 of second hydraulic cylinder 12 and the 3rd is protruding, in rod chamber
Hydraulic oil flow out, then through the second control B mouths of valve 203, A mouths enter the hydraulic cylinder 13 of second hydraulic cylinder 12 and the 3rd without bar
In chamber, auxiliary strengthens the input pressure of rodless cavity, is consequently formed differential mode, can so accelerate one-way lock rationed marketing 1, unidirectional
Stop pin 2 30 stretches out speed.
After one-way lock rationed marketing 1, one-way lock rationed marketing 2 30 are stretched out in place, because the second oil feeding line 201 is still being supplied
Oil, if now hydraulic oil is further continued for promoting the piston rod of the hydraulic cylinder 13 of second hydraulic cylinder 12 and the 3rd, will certainly cause to list
To stop pin 1, the damage of one-way lock rationed marketing 2 30, so arranging air relief valve 204 on the second oil feeding line 201.Will be unidirectional
Pressure in the rodless cavity of the hydraulic cylinder 13 of second hydraulic cylinder 12 and the 3rd when stop pin 1, one-way lock rationed marketing 2 30 are stretched out in place
Power is set as the threshold value that air relief valve 204 disconnects, as long as the pressure of hydraulic oil is disconnected more than air relief valve 204 in the second oil feeding line 201
The threshold value opened, air relief valve 204 just disconnects.Air relief valve 204 disconnect after, due to hydraulic oil in the second oil feeding line 201 pressure still
Rising, the pressure in the rod chamber of the hydraulic cylinder 13 of second hydraulic cylinder 12 and the 3rd is also rising, second hydraulic cylinder 12 and the 3rd
The piston rod of hydraulic cylinder 13 certainly will just have the trend of rollback；But, now because the B mouths and A mouths of the second control valve 203 are to communicate
, so the pressure of the rod chamber of the hydraulic cylinder 13 of second hydraulic cylinder 12 and the 3rd and B mouth pressure, A mouth pressure all sames, both greater than
The pressure of the rodless cavity of the hydraulic cylinder 13 of second hydraulic cylinder 12 and the 3rd；So the check valve 205 and second in parallel with air relief valve 204
The pressure of one end that hydraulic cylinder 12, the rodless cavity of the 3rd hydraulic cylinder 13 are connected is less than that the A mouths with the second control valve 203 are connected
The pressure at end；And check valve 205 is on the direction flowed back to fuel tank 1 of rodless cavity of second hydraulic cylinder 12, the 3rd hydraulic cylinder 13
Conducting, so check valve 205 can not be opened, second hydraulic cylinder 12, the oil of the rodless cavity of the 3rd hydraulic cylinder 13 can not flow out, pressure
Power is still maintained；So the piston rod of second hydraulic cylinder 12, the 3rd hydraulic cylinder 13 cannot rollback, it is one-way lock rationed marketing 1, unidirectional
Stop pin 2 30 maintains current state.
After pressure reaches the setting value of air relief valve 204, air relief valve 204 disconnects, it is ensured that second hydraulic cylinder 12, the 3rd hydraulic pressure
The pressure of the rodless cavity of cylinder 13 is not higher than design load, prevents wedging effect from causing stop pin stuck.When one-way lock rationed marketing 1, list
After stretching out in place to stop pin 2 30, second controls electric magnet b2, a2 all power-off of valve 203, and now the second control valve 203 is in
Treat work station.
When the electric magnet a2 that electric-control system restarts the second control valve 203 obtains electric, the second control valve 203 is in treats work work
Position.The P mouths of valve are connected with B mouths, and R mouths are connected with A mouths, and hydraulic oil enters second hydraulic cylinder 12, the rod chamber of the 3rd hydraulic cylinder 13,
Piston rod is retracted, and drives one-way lock rationed marketing one 20, one-way lock rationed marketing 2 30 to return, second hydraulic cylinder 12, the 3rd hydraulic cylinder 13
Hydraulic oil Jing check valves 205, second in rodless cavity control A, R mouth of valve 203, in flowing back into fuel tank 1.
As shown in Fig. 2 the fuel feeding of Liang Zu working groups, oil return all can be completed by a unified fuel tank 1, so the first fuel feeding
The oil feeding line 201 of oil circuit 101 and second can be by the fuel feeding of a main oil feeding line 100, and main oil feeding line 100 is by drive component from oil
Hydraulic oil is drawn in case 1, wherein the drive component includes hydraulic pump 2 and motor 3, hydraulic pump 2 is connected with motor 3, liquid
Press pump 2 is driven and hydraulic oil is extracted from fuel tank 1 by motor 3, and the oil-out of hydraulic pump 2 is connected with main oil feeding line 100, will
Hydraulic oil is delivered in main oil feeding line 100.Main oil feeding line 100 is drawn after fuel tank 1, is branched off into two oil feeding lines, referred to as
First oil feeding line 101 and the second oil feeding line 102.
Further, in the present embodiment, hydraulic pump 2 can be dosing pump or variable pump.
In the same manner, the first oil return circuit 102 and the second oil return circuit 202 can also by the oil return of a main oil return circuit 200, first
The oil return circuit 202 of oil return circuit 102 and second is connected to main oil return circuit 200, and main oil return circuit 200 is connected with fuel tank 1.
Further, in order to prevent oil pressure too high, it is ensured that the safety of each element in oil circuit, in the He of main oil feeding line 100
It is also associated with protecting branch road between main oil return circuit 200, one end of the protection branch road is connected on main oil feeding line 100, another
End is connected on main oil return circuit 200, and on protection branch road a safety overflow valve 4 is arranged.Safety overflow valve 4 can be pressure control
Valve processed.The effect of safety overflow valve 4 is, when the pressure rise of main oil feeding line 100 is to certain value, hydraulic oil to be leaked back into into oil
Case 1, prevents hydraulic fluid pressure from further raising, and equipment is worked the mischief.Especially when one-way lock rationed marketing 1 and monodirectional locking
When pin 2 30 is in fully extended station, second hydraulic cylinder 12, the 3rd hydraulic cylinder 13 are caused in order to avoid charge oil pressure is too high
Piston rod rollback, so setting is when the piston rod of second hydraulic cylinder 12, the 3rd hydraulic cylinder 13 reaches rollback setting pressure, safety
The overflow pressure relief of overflow valve 4.
In the present embodiment, because the hydraulic system is that the impeller of wind power generating set is locked with three stop pins,
Therefore, the control of valve 203 is controlled the first control valve 103 and second by electric-control system, the first working group can be respectively realized
The one-way lock that second hydraulic cylinder 12 drives in the action of the reversible lock rationed marketing 10 that middle first hydraulic cylinder 11 drives and the second working group
The action of one-way lock rationed marketing 2 30 that rationed marketing one 20, the 3rd hydraulic cylinder 13 drives, complete the first working group and the second working group has
Sequence works.
Preferably, for the ease of control, automatization level is improved, the first control valve 103 and second is controlled in the present embodiment
Valve 203 all elects solenoid electric valve as, by electric control system controls.More preferably, for the ease of commutation control, the first control valve 103
Elect O-shaped three-position four-way valve as, the second control valve 203 elects p-type three-position four-way valve as.O-shaped three-position four-way valve and p-type three-position four-way valve
On all there are two electric magnet, electric-control system is by which on the O-shaped three-position four-way valve of control and/or p-type three-position four-way valve
Electric magnet obtains electric (or must not be electric), the conducting form of oil circuit control.
Further say, if being respectively provided with piston rod on first hydraulic cylinder 11, second hydraulic cylinder 12, the 3rd hydraulic cylinder 13
Position switch, can make electric-control system more accurately know the position of piston rod, control is made in time and is judged.
The work specification of the embodiment of the present invention is as follows：
A) reversible lock rationed marketing 10 is connected on the piston rod of first hydraulic cylinder 11 controlled by the first control valve 103, will be single
Second hydraulic cylinder 12, the 3rd liquid controlled by the second control valve 203 is connected to stop pin 1, one-way lock rationed marketing 2 30
On the piston rod of cylinder pressure 13, original state is reversible lock rationed marketing, monodirectional locking pin is fully retracted；
B) reversible lock rationed marketing 10 must be first locked when impeller is braked, so, electric-control system first starts the first control valve 103 and connects
Energization source, allows electric magnet b1 to obtain electric (now a1 power-off), and P, A mouth for making valve is connected, and R, B mouth connection, hydraulic oil enters reversible lock
The rodless cavity of the first hydraulic cylinder 11 that rationed marketing 10 is located, reversible lock rationed marketing 10 is stretched out, and by impeller centering, reversible lock rationed marketing 10 is released
During, the oil of the rod chamber of first hydraulic cylinder 11 flows back to fuel tank 1；
Before reversible lock rationed marketing 10 is fully extended, the position switch in first hydraulic cylinder 11 sends at any time to electric-control system
Signal, electric-control system is closed second and controls valve 203, prevents one-way lock rationed marketing to be misused；
C) reversible lock rationed marketing 10 is fully extended, and after impeller centering, locking, the position switch in first hydraulic cylinder 11 is sent out
Go out signal, electric control system controls first control the electric magnet b1 power-off of valve 103, switch on power while starting second and controlling valve 203；
D) electric-control system allows first the electric magnet b2 of the second control valve 203 to obtain electric (now a2 power-off), the second control valve 203
P mouths connect with A, B mouth simultaneously, now second hydraulic cylinder 12, two rod chambers of the 3rd hydraulic cylinder 13 and the second oil feeding line
201 connections, two rodless cavities are connected with the second oil return circuit 202, second hydraulic cylinder 12, the pressure of the rodless cavity of the 3rd hydraulic cylinder 13
Power oil promotes two one-way lock rationed marketings to stretch out, and second hydraulic cylinder 12, the pressure oil of the rod chamber of the 3rd hydraulic cylinder 13 flow out, then Jing
B, A mouth for crossing valve enters second hydraulic cylinder 12, the rodless cavity of the 3rd hydraulic cylinder 13, forms differential mode, so accelerates one-way lock
Speed is stretched out in rationed marketing 1, one-way lock rationed marketing 2 30；
E) air relief valve 204 and check valve 205 are connected in the rodless cavity into second hydraulic cylinder 12, the 3rd hydraulic cylinder 13 in parallel
Oil circuit on, and check valve 205 ends on the direction of the oil circuit into hydraulic cylinder rodless cavity, when one-way lock rationed marketing 1, single
Stretch out to stop pin 2 30, hydraulic fluid pressure rises, pressure is reached after the setting value of air relief valve 204, and air relief valve 204 disconnects, protect
Card second hydraulic cylinder 12, the rodless cavity pressure of the 3rd hydraulic cylinder 13 are not higher than design load, prevent wedging effect from causing to lock pin card
Extremely；
F) after two one-way lock rationed marketings are all stretched out and are locked, the position switch on second hydraulic cylinder 12, the 3rd hydraulic cylinder 13
Signal is sent, electric-control system starts first and controls valve 103 and power supply disconnection, prevents reversible lock rationed marketing to be misused；
G) after the completion of impeller locking work, second is started first and controls valve 203, the electric magnet a2 of the second control valve 203
Electric (now b2 power-off), P, B mouth connection of the second control valve 203, the connection of R, A mouth, pressure oil enter second hydraulic cylinder 12, the
The rod chamber of three hydraulic cylinders 13, the oil of rodless cavity is forced out, and Jing check valves 205, second control A, R mouth of valve 203, flow back to fuel tank
1, one-way lock rationed marketing 1, the rollback of one-way lock rationed marketing 2 30；Then electric-control system closes the second power supply for controlling valve 203；
H) after monodirectional locking pin is fully retracted, the position switch on second hydraulic cylinder 12, the 3rd hydraulic cylinder 13 sends letter
Number, electric-control system restarts the first control valve 103, allows the electric magnet a1 of the first control valve 103 to obtain electric first, and P, B mouth of valve connects
Logical, R, A mouth connection, hydraulic oil enters the rod chamber of first hydraulic cylinder 11, and reversible lock rationed marketing 10 is return.
Operate more than, complete reversible lock rationed marketing stretch out-one-way lock rationed marketing stretches out-one-way lock rationed marketing retracts-bis-
To the course of action that stop pin is retracted.Certainly, if not being applied to this impeller locking occasion, electric-control system completely not necessarily in
Such order regulates and controls each solenoid directional control valve, is regulated and controled according to job demand.
In a word, in hydraulic system of the present invention, two control valves are accessed by parallel in systems, it is possible to achieve respectively
The purpose of two groups of working oil paths is controlled, and by being connected in parallel several hydraulic cylinders on same control valve oil road, it is possible to it is real
The purpose of multiple hydraulic cylinders is now controlled simultaneously.Also, on oil circuit control, by the selection for controlling valve, hydraulic pressure can also be realized
Cylinder rod chamber and the connection of rodless cavity, form differential mode, the operation of executive component-stop pin that quickening is connected with hydraulic cylinder
Speed, so as to save energy.
More than, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any to be familiar with
Those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in all should be covered
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (11)
1. a kind of lock of draught fan impeller three determines hydraulic system, including the first working group, and first working group includes the first fuel feeding
Oil circuit (101), the first oil return circuit (102), first oil feeding line (101) and first oil return circuit (102) are passed through
First control valve (103) is connected with first hydraulic cylinder (11), the piston rod connection reversible lock rationed marketing of the first hydraulic cylinder (11)
(10)；It is characterized in that：Also include the second working group；
Second working group includes the second oil feeding line (201), the second oil return circuit (202), second oil feeding line
(201) control valve (203) through second and be connected in parallel second hydraulic cylinder (12) and the 3rd liquid with second oil return circuit (202)
Cylinder pressure (13), the second hydraulic cylinder (12), the piston rod of the 3rd hydraulic cylinder (13) connect respectively one-way lock rationed marketing one
And one-way lock rationed marketing two (30) (20)；And an air relief valve (204) and is arranged in parallel on second oil feeding line (201) singly
To valve (205), the check valve (205) is led on the rodless cavity backflow direction of second hydraulic cylinder (12) and the 3rd hydraulic cylinder (13)
It is logical.
2. the lock of draught fan impeller according to claim 1 three determines hydraulic system, it is characterised in that：First oil feeding line
(101) connect with the rodless cavity of the first hydraulic cylinder (11), first oil return circuit (102) and the first hydraulic cylinder
(11) rod chamber connection.
3. the lock of draught fan impeller according to claim 1 three determines hydraulic system, it is characterised in that：Second oil feeding line
(201) while connecting with the rodless cavity of the second hydraulic cylinder (12), the 3rd hydraulic cylinder (13), second oil return circuit
(202) while connecting with the rod chamber of the second hydraulic cylinder (12), the 3rd hydraulic cylinder (13).
4. the lock of draught fan impeller three according to claim 1 or 2 or 3 determines hydraulic system, it is characterised in that：First control
Valve (103) processed and second control valve (203) are three-position four-way electromagnetic directional valve.
5. the lock of draught fan impeller according to claim 4 three determines hydraulic system, it is characterised in that：The first control valve
(103) it is O-shaped three-position four-way electromagnetic directional valve, second control valve (203) is p-type three-position four-way electromagnetic directional valve.
6. the lock of draught fan impeller according to claim 5 three determines hydraulic system, it is characterised in that：The O-shaped 3-position 4-way
The P mouths of solenoid directional control valve are connected with the oil inlet end of first oil feeding line (101), R mouths and first oil return circuit (102)
Oil revolving end connection, A mouths connect with the rodless cavity of first hydraulic cylinder (11), and B mouths are connected with the rod chamber of first hydraulic cylinder (11)；
The P mouths of the p-type three-position four-way electromagnetic directional valve are connected with the oil inlet end of second oil feeding line (201), R mouths and institute
State the oil revolving end connection of the second oil return circuit (202), A mouths simultaneously with the second hydraulic cylinder (12), the 3rd hydraulic cylinder (13)
Rodless cavity is connected, and B mouths are connected with the rod chamber of the second hydraulic cylinder (12), the 3rd hydraulic cylinder (13) simultaneously.
7. the lock of draught fan impeller according to claim 6 three determines hydraulic system, it is characterised in that：The air relief valve (204)
It is arranged on A mouths and the second hydraulic cylinder (12) and the 3rd hydraulic cylinder (13) of the p-type three-position four-way electromagnetic directional valve
Between second oil feeding line (201) on.
8. the lock of draught fan impeller three according to claim 1 or 2 or 3 determines hydraulic system, it is characterised in that：Described first
Piston rod position switch is respectively provided with hydraulic cylinder (11), second hydraulic cylinder (12), the 3rd hydraulic cylinder (13)；One electric-control system, electricity
The each position switch of control connection and first control valve (103), the second control valve (203).
9. the lock of draught fan impeller three according to claim 1 or 2 or 3 determines hydraulic system, it is characterised in that：Described first supplies
Oil circuit (101) and second oil feeding line (201) are connected with a main oil feeding line (100) jointly, the main oil feeding line
(100) Jing drive components are connected with fuel tank (1)；First oil return circuit (102) and second oil return circuit (202) while
It is connected with a main oil return circuit (200), the main oil return circuit (200) is connected with the fuel tank (1).
10. the lock of draught fan impeller according to claim 9 three determines hydraulic system, it is characterised in that：The drive component bag
Hydraulic pump (2) and motor (3) are included, the hydraulic pump (2) electrically connects with the motor (3), the oil-feed of the hydraulic pump (2)
Mouth is connected with the fuel tank (1), and the oil-out of the hydraulic pump (2) is connected with the main oil feeding line (100).
The lock of 11. draught fan impeller according to claim 9 three determines hydraulic system, it is characterised in that：In the main fuel feeding oil
Protection branch road is connected between road (100) and the main oil return circuit (200), a safety overflow valve (4) is set on protection branch road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096300.3A CN105545846B (en) | 2016-02-22 | 2016-02-22 | Three-pin locking hydraulic system for draught fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096300.3A CN105545846B (en) | 2016-02-22 | 2016-02-22 | Three-pin locking hydraulic system for draught fan impeller |
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| Publication Number | Publication Date |
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| CN105545846A CN105545846A (en) | 2016-05-04 |
| CN105545846B true CN105545846B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610096300.3A Active CN105545846B (en) | 2016-02-22 | 2016-02-22 | Three-pin locking hydraulic system for draught fan impeller |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106041172A (en) * | 2016-07-21 | 2016-10-26 | 力帆实业(集团)股份有限公司 | Piston drill workbench and locking mechanism thereof |
| CN109595129A (en) * | 2018-12-13 | 2019-04-09 | 北京金风科创风电设备有限公司 | Impeller locking hydraulic system and wind generating set |
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| US6134814A (en) * | 1998-05-28 | 2000-10-24 | M. J. Electric, Inc. | Hydraulic locking cylinder for plow blades |
| CN201851270U (en) * | 2010-11-25 | 2011-06-01 | 华锐风电科技(江苏)有限公司 | Hydraulic driving system for braking of wind power generating unit |
| CN201865861U (en) * | 2010-12-06 | 2011-06-15 | 济南轨道交通装备有限责任公司 | Wind wheel locking device for wind generating set |
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| CN105545846A (en) | 2016-05-04 |
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