CN107387477A - A kind of leading controller for guiding valve, hydraulic cylinder control loop - Google Patents
A kind of leading controller for guiding valve, hydraulic cylinder control loop Download PDFInfo
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- CN107387477A CN107387477A CN201710594762.2A CN201710594762A CN107387477A CN 107387477 A CN107387477 A CN 107387477A CN 201710594762 A CN201710594762 A CN 201710594762A CN 107387477 A CN107387477 A CN 107387477A
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- Prior art keywords
- valve
- oil
- oil circuit
- valve pocket
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0426—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with fluid-operated pilot valves, i.e. multiple stage valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
- F16K31/383—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston
-
- 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
- F15B2211/50—Pressure control
-
- 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
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/8606—Control during or prevention of abnormal conditions the abnormal condition being a shock
-
- 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
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/8616—Control during or prevention of abnormal conditions the abnormal condition being noise or vibration
Abstract
A kind of leading controller for guiding valve, hydraulic cylinder control loop, control device：Valve element and piston are respectively fitted with first and second valve pocket in valve body；Left piston bar pass through slideway one after it is affixed with valve element, right piston bar pass through slideway two after stretch into the 3rd valve pocket；A back-moving spring is respectively set with outside left and right piston rod；Oil inlet is communicated with main oil feed line, and the middle part of main oil feed line is provided with throttling；Main oil feed line both sides are connected with the left and right portion of the second valve pocket respectively by first and second oil circuit；Oil inlet is connected by the 3rd oil circuit with the position kept right in the middle part of the 3rd valve pocket；Oil-out is connected by being arranged on the 4th oil circuit of valve inner with the position to be kept left in the middle part of the 3rd valve pocket；The middle part of valve element is provided with indent valve port；Control loop：Leading controller is serially connected between the rod chamber of hydraulic cylinder and the control mouth of balanced valve.The device can effectively improve the stability of guiding valve control；The control loop can make the stable action of hydraulic cylinder reliable.
Description
Technical field
The present invention relates to technical field of hydraulic, and in particular to a kind of leading controller for guiding valve and a kind of liquid
Cylinder pressure control loop.
Background technology
In the plant equipment such as engineering machinery and building machinery, hydraulic pressure load bearing system is largely employed, wherein guiding valve is this
Crucial Hydraulic Elements in class system, the quality of its performance directly affect the performance of complete machine.Such as in hydraulic work system
When, if the load of executive component is loading, and, it is necessary to be made using guiding valve when the action direction of the loading is consistent with the direction of motion
Oil flow resistance is produced on its oil return circuit, to prevent the motion of hydraulic cylinder or hydraulic motor under load effect out of hand.And
The action of guiding valve needs a pilot signal to control the opening degree of its internal oil circuit, therefore, the pilot control of guiding valve more
Device requires that guiding condition is good, the features such as being active in one's movements, but the characteristics of due to guide's oil circuit, it is more fast that it builds the pressure time
Speed, it is easy to produce pressure oscillation, when hydraulic pressure signal oil pressure fluctuation is larger, it is to being controlled the pilot control oil that valve is provided
Pressure is rapid to be risen, and then can make the translational speed suddenly change of the valve element of controlled valve, easily cause the creeping of hydraulic actuator,
Low-frequency vibration phenomenon caused by accelerated motion etc. suddenly, is commonly called as shaking.So, the reliable of mechanical device work can not only be influenceed
Property, and easily cause potential safety hazard.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention provides a kind of leading controller for guiding valve, the control
Device processed can effectively reduce the pressure oscillation of guiding valve control mouth, and then can effectively improve the stability of guiding valve control, can improve machine
The reliability of tool device.
To achieve these goals, the present invention provides a kind of leading controller for guiding valve, including valve body and valve element,
The valve outer surface offers oil inlet, oil-out and drain tap respectively, and coaxial heart is set at left and right sides of the valve inner
The first valve pocket and the second valve pocket are equipped with, valve element, which is slidingly sealed, to be matingly fitted within the first valve pocket, and the right-hand member of the first valve pocket passes through
The slideway one for being coaxial therewith heart setting is connected with the left end of the second valve pocket, and the work being slidingly sealed with it is provided with the second valve pocket
Plug；Valve inner is additionally provided with the 3rd valve pocket on the right side of the second valve pocket, and the left end of the 3rd valve pocket passes through coaxial with the second valve pocket
The slideway two that the heart is set connects with the right part of the second valve pocket；
The left side and right side of the piston are respectively fixedly connected with the left piston bar for being coaxial therewith heart setting and right work
Stopper rod, the left end of left piston bar are fixedly connected after sliding through the slideway one with the right side of valve element, the right-hand member of right piston bar
Stretched into after sliding through the slideway two in the 3rd valve pocket；Left piston bar and right piston bar are respectively set with the part in the second valve pocket
There is a back-moving spring；
The oil inlet connects with being arranged on the main oil feed line of valve inner, is provided with the middle part of the main oil feed line
Throttling；Main oil feed line passes through the first oil circuit and the second oil circuit left part with the second valve pocket and the right side respectively in the both sides of throttling
Portion connects；Part of the main oil feed line between throttling and oil inlet is also by keeping right in the middle part of the 3rd oil circuit and the first valve pocket
Position connects；The oil-out is connected by being arranged on the 4th oil circuit of valve inner with the position to be kept left in the middle part of the first valve pocket；
The drain tap and the draining oil communication for being arranged on valve inner, the draining oil circuit is by being arranged on the 5th of valve inner
Oil circuit connects with the 3rd valve pocket, draining oil circuit also by the 6th oil circuit for being arranged on valve inner and the 7th oil circuit respectively with
The left part of first valve pocket connects with right part；
The middle part of the valve element is provided with indent valve port, and the indent valve port is used to control the 3rd oil in valve element moving process
Connection, disconnection or the regulation of opening degree size of oil circuit between the oil circuits of Lu Yu tetra-.
In the technical scheme, by set respectively in the left and right ends of the piston in the second valve pocket left piston bar and
Right piston bar, and back-moving spring is arranged with outside left piston bar and right piston bar, it can so be fluctuated in oil pressure small range
When, piston is failure to actuate between two parties substantially；Throttling is specifically provided with the middle part of main oil passage, and is led to respectively in the both sides of throttling
Cross the first oil circuit and the second oil circuit to connect with the left part and right part of the second valve pocket respectively, can be so low pressure oil in signal oil
When, a part of signal oil injects the left part of the second valve pocket by the son that throttles, and another part signal oil is directly flowed by the second oil circuit
Enter the right part of the second valve pocket.The pressure fluctuation scope hour of signal oil, flow through throttling son enter the second valve pocket left part oil pressure and
The oil pressure of the second valve pocket right part is directly entered by the second oil circuit can balance each other substantially, and piston will not act, meanwhile, there is one
The space for dividing fluid to enter by the 3rd oil circuit where indent valve port, and flowed out from the 4th oil circuit and oil-out, because piston
Position will not change, thus the position of indent valve port will not also change, and the oil circuit connected between the 3rd oil circuit and the 4th oil circuit is opened
Mouth degree will not also change, and so as to provide stable signal oil output, can be advantageous to the operating stably of guiding valve.And when oil inlet
During oil liquid pressure rapid increase, because the damping action of throttling makes the pressure on the right side of piston rise the pressure for being faster than left side, enter
And piston can move to left, while promote valve element to move to left, reduce the opening degree of oil circuit between the 3rd oil circuit and the 4th oil circuit, even if valve
Mouth diminishes.Should during, by the 3rd oil circuit enter indent valve port in oil mass because valve element move to left maintain one it is less
Stable flow, and then the signal oil pressure flowed out by the 4th oil circuit maintains a less scope of fluctuation, so as to be cunning
Valve provides a stable signal oil output, can make in inlet pressure rapid increase oil-out pressure maintain one compared with
For stable scope.When the oil liquid pressure rapid decrease of oil inlet, because the damping action of throttling makes the pressure on the right side of piston
Power declines the pressure for being faster than left side, and then piston can move to right, while is moved to right with movable valve plug, increases the 3rd oil circuit and the 4th oil circuit
Between oil circuit opening degree, even if valve port becomes big.During being somebody's turn to do, the oil mass entered by the 3rd oil circuit in indent valve port is because of valve element
Move to right and slowly reduce, and then oil-out pressure decrease speed is slowed down, so as to stablize the fluctuation range of oil-out pressure.
Under various operating modes, a less scope of fluctuation is maintained by the signal oil pressure of oil-out outflow, so as to be provided for guiding valve
One stable signal oil output, can make when inlet pressure fluctuates excessive oil-out pressure maintain one it is relatively stable
Scope.Therefore, the present apparatus can be effectively reduced the pressure oscillation of guiding valve control mouth, and then weaken in guiding valve control loop
Impact and jitter phenomenon, the stationarity of the control of valve can be effectively improved.
Further, in order to which the adjustable extent of restrictive valve port, the left part ecto-entad of the valve body are laterally provided with screw thread
Kong Yi, fitted through by screw thread provided with adjusting screw rod one in the screwed hole one；It can be limited by the setting of adjusting screw rod one
Valve element mobile maximum position to the left.
Further, in order to which the adjustable extent of restrictive valve port, the right part ecto-entad of the valve body are laterally provided with screw thread
Hole two, fitted through by screw thread provided with adjusting screw rod two in the screwed hole two；It can be limited by the setting of adjusting screw rod two
Right piston bar mobile maximum position to the right, so piston can be limited to the right can maximum mobile position.
Further, in order that valve element is when moving to left, the oil mass entered by the 3rd oil circuit in the first valve pocket can slowly subtract
It is small, to improve the stabilization of output signal oil pressure, the valve element be provided with outside the right-hand member of indent valve port a section by a left side to
Right diminishing annular breach.
It is another object of the present invention to provide a kind of hydraulic cylinder control loop, the control loop can make the dynamic of hydraulic cylinder
Work is steady reliable, is avoided that the operating mode for causing hydraulic cylinder to be shaken because of the influence of system pressure occurs, can improve hydraulic cylinder action
Reliability and stationarity.
To achieve the above object, the present invention also provides a kind of hydraulic cylinder control loop, including hydraulic cylinder, balanced valve, electromagnetism
Reversal valve and pilot-actuated valve, two actuator ports of the balanced valve rodless cavity with hydraulic cylinder and the electromagnetic switch respectively
One actuator port of valve is connected by pipeline, the rod chamber of the hydraulic cylinder another working oil with solenoid directional control valve respectively
Mouth is connected with the oil inlet of the pilot-actuated valve by pipeline, the control of the oil-out of the pilot-actuated valve and the balanced valve
Donsole is connected by pipeline, and the drain tap of pilot-actuated valve is connected by pipeline with fuel tank；The pilot-actuated valve is according to power
Profit requires the leading controller described in any one in 1 to 4.
In the technical scheme, when larger fluctuation occurs in the oil pressure of the rod chamber of piston rod, into pilot-actuated valve
The pressure oscillation of oil inlet also can be larger, and the signal oil pressure of the output of pilot-actuated valve maintains a constant scope
It is interior, the control oil pressure of balanced valve can be made not occur significantly to fluctuate, so as to be advantageous to the operating stably of hydraulic system.
Therefore, the present apparatus can be effectively reduced the pressure oscillation of guiding valve control mouth, so eliminate the impact in guiding valve control loop and
Jitter phenomenon, the stationarity of HYDRAULIC CONTROL SYSTEM can be effectively improved.
Brief description of the drawings
Fig. 1 is the structural representation of the leading controller of guiding valve in the present invention；
Fig. 2 is the structural representation of hydraulic cylinder control loop in the present invention.
In figure：1st, oil inlet, 2, oil-out, 3, drain tap, the 4, first valve pocket, the 5, second valve pocket, 6, valve element, 7, slideway
One, 8, piston, the 9, the 3rd valve pocket, 10, slideway two, 11, left piston bar, 12, right piston bar, 13, main oil feed line, 14, throttling
Son, the 15, first oil circuit, the 16, second oil circuit, the 17, the 3rd oil circuit, the 18, the 4th oil circuit, 19, draining oil circuit, the 20, the 5th oil circuit,
21st, indent valve port, 22, adjusting screw rod one, 23, adjusting screw rod two, 24, valve body, 25, back-moving spring, 26, annular breach, 27, liquid
Cylinder pressure, 28, solenoid directional control valve, 29, balanced valve, 30, pilot-actuated valve, the 31, the 6th oil circuit, the 32, the 7th oil circuit.
Embodiment
The invention will be further described below.
As shown in figure 1, a kind of leading controller for guiding valve, including valve body 24 and valve element 6, the appearance of valve body 24
Face offers oil inlet 1, oil-out 2 and drain tap 3 respectively, and the coaxial heart in the inside of valve body 24 left and right sides is provided with first
The valve pocket 5 of valve pocket 4 and second, valve element 6, which is slidingly sealed, to be matingly fitted within the first valve pocket 4, the right-hand member of the first valve pocket 4 by with its
The slideway 1 of concentric setting is connected with the left end of the second valve pocket 5, and the piston being slidingly sealed with it is provided with the second valve pocket 5
8；Be additionally provided with the 3rd valve pocket 9 inside valve body 24 on the right side of the second valve pocket 5, the left end of the 3rd valve pocket 9 by with the second valve pocket 5
The slideway 2 10 of concentric setting connects with the right part of the second valve pocket 5；
The left side and right side of the piston 8 are respectively fixedly connected with the left piston bar 11 for being coaxial therewith heart setting and the right side
Piston rod 12, the left end of left piston bar 11 are fixedly connected after sliding through the slideway 1 with the right side of valve element 6, right piston
The right-hand member of bar 12 is stretched into the 3rd valve pocket 9 after sliding through the slideway 2 10；Left piston bar 11 and right piston bar 12 are in second
Part in valve pocket 5 is respectively set with a back-moving spring 25；
The oil inlet 1 connects with the main oil feed line 13 being arranged on inside valve body 24, in the main oil feed line 13
Portion is provided with throttling 14；Main oil feed line 13 the both sides of throttling 14 by the first oil circuit 15 and the second oil circuit 16 respectively with
The left part of second valve pocket 5 connects with right part；Part of the main oil feed line 13 between throttling 14 and oil inlet 1 also passes through the 3rd
The position that oil circuit 17 is kept right with the middle part of the first valve pocket 4 connects；The oil-out 2 passes through the 4th oil circuit that is arranged on inside valve body 24
18 positions to be kept left with the middle part of the first valve pocket 4 connect；The drain tap 3 connects with the draining oil circuit 19 being arranged on inside valve body 24
Logical, the draining oil circuit 19 is connected by being arranged on the 5th oil circuit 20 inside valve body 24 with the 3rd valve pocket 9, draining oil circuit
19 are also connected by the left part and right part of the 6th oil circuit 27 being arranged on inside valve body 24 and the 7th oil circuit 28 respectively with the first valve pocket 4
It is logical；
The middle part of the valve element 6 is provided with indent valve port 21, and the indent valve port 21 is used to control in the moving process of valve element 6
Connection, disconnection or the regulation of opening degree size of oil circuit between 3rd oil circuit 17 and the 4th oil circuit 18.
By setting left piston bar and right piston bar respectively in the left and right ends of the piston in the second valve pocket, and on a left side
Back-moving spring is arranged with outside piston rod and right piston bar, so can be when oil pressure small range fluctuate, piston is substantially placed in the middle
It is failure to actuate；Throttling is specifically provided with the middle part of main oil passage, and passes through the first oil circuit and the respectively in the both sides of throttling
Two oil circuits connect with the left part and right part of the second valve pocket respectively, so can be when signal oil is low pressure oil, a part of signal oil
By the left part for son the second valve pocket of injection that throttles, another part signal oil flows directly into the right side of the second valve pocket by the second oil circuit
Portion.The pressure fluctuation scope hour of signal oil, flow through throttling and enter the oil pressure of the second valve pocket left part and straight by the second oil circuit
The oil pressure tapped into the second valve pocket right part can balance each other substantially, and piston will not act, meanwhile, some fluid can pass through
The space that three oil circuits enter where indent valve port, and flowed out from the 4th oil circuit and oil-out, because piston position will not change, because
And the position of indent valve port will not also change, the oil circuit opening degree connected between the 3rd oil circuit and the 4th oil circuit will not also change,
So as to provide stable signal oil output, the operating stably of guiding valve can be advantageous to.And when oil inlet oil liquid pressure it is quick on
When rising, because the damping action of throttling makes the pressure on the right side of piston rise the pressure for being faster than left side, and then piston can move to left, together
When promote valve element move to left, the opening degree of oil circuit between the 3rd oil circuit and the 4th oil circuit is reduced, even if valve port diminishes.The process
In, by the 3rd oil circuit into oil mass the moving to left to maintain the flow of a less stabilization because of valve element in indent valve port, enter
And the signal oil pressure flowed out by the 4th oil circuit maintains a less scope of fluctuation, so as to provide a stabilization for guiding valve
Signal oil output, the pressure of oil-out can be made to maintain a relatively stable scope in inlet pressure rapid increase.
When the oil liquid pressure rapid decrease of oil inlet, because the damping action of throttling, which declines the pressure on the right side of piston, is faster than left side
Pressure, and then piston can move to right, while be moved to right with movable valve plug, increase the opening of oil circuit between the 3rd oil circuit and the 4th oil circuit
Degree, even if valve port becomes big.Should during, by the 3rd oil circuit enter indent valve port in oil mass moving to right slowly to subtract because of valve element
It is small, and then oil-out pressure decrease speed is slowed down, so as to stablize the fluctuation range of oil-out pressure.Under various operating modes,
One less scope of fluctuation is maintained by the signal oil pressure of oil-out outflow, so as to provide a stable signal for guiding valve
Oil output, when inlet pressure fluctuates excessive the pressure of oil-out can be made to maintain a relatively stable scope.Therefore, originally
Device can be effectively reduced the pressure oscillation of guiding valve control mouth, and then weaken the impact in guiding valve control loop and shake now
As the stationarity of the control of valve can be effectively improved.
For the adjustable extent of restrictive valve port, the left part ecto-entad of the valve body 24 is laterally provided with screwed hole one,
Fitted through in the screwed hole one by screw thread provided with adjusting screw rod 1.Valve can be limited by the setting of adjusting screw rod 1
The mobile maximum position to the left of core 6.
For the adjustable extent of restrictive valve port, the right part ecto-entad of the valve body 24 is laterally provided with screwed hole two,
Fitted through in the screwed hole two by screw thread provided with adjusting screw rod 2 23.The right side can be limited by the setting of adjusting screw rod 2 23
The mobile maximum position to the right of piston rod 12, so piston 8 can be limited to the right can maximum mobile position.
In order that valve element, when moving to left, the oil mass entered by the 3rd oil circuit in the first valve pocket can be reduced slowly, to carry
The stabilization of high output signal oil pressure, the valve element 6 are provided with a section by left-to-right outside the right-hand member of indent valve port 21
Diminishing annular breach 26.
As shown in Fig. 2 the present invention also provides a kind of hydraulic cylinder control loop, including hydraulic cylinder 27, balanced valve 29, electromagnetism change
To valve 28 and pilot-actuated valve 30, two actuator ports of the balanced valve 29 rodless cavity with hydraulic cylinder 27 and the electricity respectively
One actuator port of magnetic reversal valve 28 is connected by pipeline, the rod chamber of the hydraulic cylinder 27 respectively with solenoid directional control valve 28
Another actuator port is connected with the oil inlet of the pilot-actuated valve 30 by pipeline, the oil-out of the pilot-actuated valve 30
It is connected with the control mouth of the balanced valve 29 by pipeline, the drain tap of pilot-actuated valve 30 is connected by pipeline with fuel tank；Institute
Pilot-actuated valve 30 is stated as the leading controller according to any one in Claims 1-4.
When larger fluctuation occurs in the oil pressure of the rod chamber of piston rod, into the pressure oscillation of pilot-actuated valve oil inlet
Also can be larger, and the signal oil pressure of the output of pilot-actuated valve is maintained in a constant scope, can make balanced valve
Control oil pressure will not occur significantly to fluctuate, so as to be advantageous to the operating stably of hydraulic system.Therefore, the present apparatus can have
Effect ground reduces the pressure oscillation of guiding valve control mouth, and then eliminates the impact in guiding valve control loop and jitter phenomenon, can be effectively
Improve the stationarity of HYDRAULIC CONTROL SYSTEM.
The present apparatus can be used in balanced valve commutation control module in, be allowed to motion it is more steady, reduce executive component
The problem of bumpy motion.In the motion control that can be used for the guiding valves such as electro-hydraulic reversing valve.
Claims (5)
1. a kind of leading controller for guiding valve, including valve body (24) and valve element (6), valve body (24) the outer surface difference
Offer oil inlet (1), oil-out (2) and drain tap (3), it is characterised in that the internal left and right sides of the valve body (24) is coaxial
Heart is provided with the first valve pocket (4) and the second valve pocket (5), and valve element (6), which is slidingly sealed, to be matingly fitted within the first valve pocket (4),
The right-hand member of first valve pocket (4) is connected by being coaxial therewith the slideway one (7) that the heart is set with the left end of the second valve pocket (5), the second valve
The piston (8) being slidingly sealed with it is provided with chamber (5)；The is additionally provided with inside valve body (24) on the right side of the second valve pocket (5)
Three valve pockets (9), the left end of the 3rd valve pocket (9) pass through the slideway two (10) with the second valve pocket (5) concentric setting and the second valve pocket
(5) right part connection；
The left side and right side of the piston (8) are respectively fixedly connected with the left piston bar (11) for being coaxial therewith heart setting and the right side
Piston rod (12), the left end of left piston bar (11), which slides through the slideway one (7) and fixed afterwards with the right side of valve element (6), to be connected
Connect, the right-hand member of right piston bar (12) is stretched into the 3rd valve pocket (9) after sliding through the slideway two (10)；Left piston bar (11) and
Right piston bar (12) is respectively set with a back-moving spring (25) in the part in the second valve pocket (5)；
The oil inlet (1) the main oil feed line (13) internal with being arranged on valve body (24) connects, the main oil feed line (13)
To be provided with throttling sub (14) at middle part；Main oil feed line (13) passes through the first oil circuit (15) and second in the both sides of throttling sub (14)
Oil circuit (16) connects with the left part and right part of the second valve pocket (5) respectively；Main oil feed line (13) is in throttling sub (14) and oil inlet
(1) part between is also connected by the 3rd oil circuit (17) with the position kept right in the middle part of the first valve pocket (4)；The oil-out (2)
Connected by being arranged on the 4th internal oil circuit (18) of valve body (24) with the position to be kept left in the middle part of the first valve pocket (4)；The draining
Mouth (3) draining oil circuit (19) internal with being arranged on valve body (24) connects, and the draining oil circuit (19) is by being arranged on valve body
(24) the 5th internal oil circuit (20) connects with the 3rd valve pocket (9), and draining oil circuit (19) is also by being arranged on valve body (24)
Internal the 6th oil circuit (27) and the 7th oil circuit (28) connects with the left part and right part of the first valve pocket (4) respectively；
The middle part of the valve element (6) is provided with indent valve port (21), and the indent valve port (21) is used in valve element (6) moving process
Control connection, disconnection or the regulation of opening degree size of oil circuit between the 3rd oil circuit (17) and the 4th oil circuit (18).
2. a kind of leading controller for guiding valve according to claim 1, it is characterised in that the valve body (24)
Left part ecto-entad is laterally provided with screwed hole one, is fitted through in the screwed hole one by screw thread provided with adjusting screw rod one
(22)。
A kind of 3. leading controller for guiding valve according to claim 1 or 2, it is characterised in that the valve body
(24) right part ecto-entad is laterally provided with screwed hole two, is fitted through in the screwed hole two by screw thread provided with regulation spiral shell
Bar two (23).
4. a kind of leading controller for guiding valve according to claim 3, it is characterised in that the valve element (6) exists
A section is provided with outside the right-hand member of indent valve port (21) by left-to-right diminishing annular breach (26).
5. a kind of hydraulic cylinder control loop, including hydraulic cylinder (27), balanced valve (29) and solenoid directional control valve (28), its feature exist
In, in addition to pilot-actuated valve (30), two actuator ports of the balanced valve (29) rodless cavity with hydraulic cylinder (27) respectively
Connected with an actuator port of the solenoid directional control valve (28) by pipeline, the rod chamber of the hydraulic cylinder (27) respectively with electricity
Another actuator port of magnetic reversal valve (28) is connected with the oil inlet of the pilot-actuated valve (30) by pipeline, the guide
The oil-out of control valve (30) is connected with the control mouth of the balanced valve (29) by pipeline, the drain tap of pilot-actuated valve (30)
It is connected by pipeline with fuel tank；The pilot-actuated valve (30) is guide's control according to any one in Claims 1-4
Device processed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710594762.2A CN107387477B (en) | 2017-07-20 | 2017-07-20 | A kind of leading controller for guiding valve, hydraulic cylinder control loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710594762.2A CN107387477B (en) | 2017-07-20 | 2017-07-20 | A kind of leading controller for guiding valve, hydraulic cylinder control loop |
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| CN107387477A true CN107387477A (en) | 2017-11-24 |
| CN107387477B CN107387477B (en) | 2018-11-06 |
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| CN201710594762.2A Active CN107387477B (en) | 2017-07-20 | 2017-07-20 | A kind of leading controller for guiding valve, hydraulic cylinder control loop |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108591143A (en) * | 2018-06-09 | 2018-09-28 | 湖北脉辉金茂机械有限公司 | Oil circuit concealed electric floor truck |
| CN108757248A (en) * | 2018-07-09 | 2018-11-06 | 郑州航空工业管理学院 | Variable position adaptively switches the energy saving reciprocal fueller of two-way |
| CN109185249A (en) * | 2018-09-28 | 2019-01-11 | 广东机电职业技术学院 | A kind of car hydrostatic steering system automatic control flow valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109185249A (en) * | 2018-09-28 | 2019-01-11 | 广东机电职业技术学院 | A kind of car hydrostatic steering system automatic control flow valve |
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|---|---|
| CN107387477B (en) | 2018-11-06 |
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Effective date of registration: 20190531 Address after: 163712 Daqing, Heilongjiang, Guangdong Province, Hun Road District, Chengfeng south two road north public building A11 Business Service Building 9 Patentee after: Daqing Danfeng Petroleum Technology Development Co., Ltd. Address before: No. 1 Xiangwang Road, Drum Tower District, Xuzhou, Jiangsu Patentee before: Xuzhou Institute of Industry Technology |
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