CN108488455A - Valve gear and hydraulic system - Google Patents
Valve gear and hydraulic system Download PDFInfo
- Publication number
- CN108488455A CN108488455A CN201810323618.XA CN201810323618A CN108488455A CN 108488455 A CN108488455 A CN 108488455A CN 201810323618 A CN201810323618 A CN 201810323618A CN 108488455 A CN108488455 A CN 108488455A
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- Prior art keywords
- pressure
- main valve
- valve
- oil
- oil outlet
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Classifications
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a kind of valve gear and hydraulic system, valve gear includes main valve and pilot valve；Main valve includes：Main valve body；Main valve plug；Balancing spring；Flow-guiding channel；Pilot valve includes：Guide valve blocks；Pilot valve；Pilot mechanism；Active driving mechanisms are set on main valve body, and active driving mechanisms are used for the rated pressure selectively driving main valve plug according to the actual pressure and hydraulic system of the first oil inlet and/or the hydraulic oil of the first oil outlet.The valve gear of the present invention obtains active driving mechanisms for when larger fluctuation occurs for pressure, active drive main valve plug, make primary spools quick sliding quickly to adjust passage section, to make the pressure of the first oil outlet quickly return, to reduce the first oil outlet hydraulic oil pressure degree of fluctuation, make the pressure can maintain rated pressure needed for executive component normal operation or its near.
Description
Technical field
The present invention relates to technical field of hydraulic, more particularly to a kind of valve gear and hydraulic system.
Background technology
Every field of the hydraulic system for industry, science and technology and life.It is set in general, hydraulic system includes hydraulic oil storage
Standby (e.g., fuel tank), hydraulic power mechanism (e.g., hydraulic pump), hydraulic control component (e.g., reversal valve, overflow valve, pressure reducing valve, supercharging
Valve etc.), executive component (e.g., hydraulic cylinder, hydraulic motor etc.) and connect said elements and equipment fluid pressure line.Wherein, liquid
Pressure oil storage device is for providing required hydraulic oil for whole system, and hydraulic power mechanism is for drawing the hydraulic oil so that liquid
Pressure oil feeder executive component, the kinetic energy of hydraulic oil is converted to mechanical energy to drive load by executive component, and control element is used for
Control the flow direction etc. of the pressure and hydraulic oil of hydraulic system.For example, overflow valve can make entire hydraulic system maintain a perseverance
Fixed pressure, reversal valve for changing hydraulic oil flow direction so that hydraulic oil selectively supplies different executive components, unidirectionally
Valve only allows hydraulic oil unidirectionally to pass through, and pressure charging valve is used to make the pressure of some branch in hydraulic system to increase (more than hydraulic pressure
The pressure of system) to meet the needs of executive component connected to it, pressure reducing valve is used to make some branch in hydraulic system
Pressure reduce to meet the needs of executive component connected to it.
Pressure reducing valve in the prior art generally includes a main valve and pilot valve；Main valve includes main valve body and main valve plug, master
Oil inlet and oil outlet are offered on valve body, main valve plug is set in main valve body and can slide to change oil inlet and outlet
Between passage section；And flow-guiding channel is offered between oil outlet and the bottom of main valve plug, and perforation is offered on main valve plug
The throttling duct of its upper and lower ends；Pilot valve includes guide valve blocks and pilot valve；Pilot valve is offered to be connected with throttling duct
Logical guide's oil inlet and with guide's oil outlet for being connected to fuel tank, pilot valve blocks oil inlet under the action of the spring
Mouthful.
When using pressure reducing valve, the oil inlet of main valve body is made to be connect with hydraulic system pipeline, oil outlet and hydraulic actuator
Connection, while the hydraulic oil of hydraulic system is entered in main valve body by oil inlet and is flowed out from oil outlet, the portion of oil outlet
Liquid separation pressure oil enters the bottom of main valve plug by flow-guiding channel and is moved upwards with pushing against main valve plug to change oil inlet and outlet
Between passage section, while hydraulic oil enters guide valve blocks pilot valve is opened by the duct that throttles, then, from guide
The oil outlet oil return box of valve body, so that primary spool position is a metastable position so that the size of passage section
It keeps relative stability, at this point, the opening pressure of Pilot poppet is equal with throttling duct, flow-guiding channel and outlet pressure and is less than
Hydraulic fluid pressure at the oil inlet of main valve plug, to make one definite value of pressure initiation of oil outlet, and less than at oil inlet
Hydraulic oil pressure.
Above-mentioned pressure reducing valve in the prior art has the disadvantage that：
1, when the hydraulic fluid pressure from hydraulic system fluctuates, the hydraulic oil of the outlet oil of above-mentioned pressure reducing valve also can
Proportional to fluctuate, this can accordingly make executive component generate larger fluctuation, and work and service life to executive component are not
Profit, and loud noise is will produce, the load being connected on executive component is also influenced simultaneously.
2, when the operation for the load being connect with executive component generates fluctuation, the hydraulic oil of the oil inlet of above-mentioned pressure reducing valve
Pressure can also fluctuate, also unfavorable to hydraulic system, and will also result in very big influence to load simultaneously.
Invention content
For the above-mentioned technical problems in the prior art, the embodiment provides a kind of valve gear and hydraulic pressure
System.
In order to solve the above technical problems, the embodiment of the present invention the technical solution adopted is that：
A kind of valve gear, which is characterized in that including main valve and pilot valve；
The main valve includes：
Main valve body inside offers directed cavity, and the first oil inlet for penetrating through the directed cavity is offered on the main valve body
With the first oil outlet, first oil inlet is connected to the system pipeline in hydraulic system, first oil outlet and the liquid
Executive component connection in pressure system；
Main valve plug is set in the directed cavity and can be slided along the directed cavity to change first oil inlet
With the passage section between first oil outlet；The main valve plug offer axially through throttling duct；
Balancing spring is set in the directed cavity and for pushing against the main valve plug；
Honeycomb duct is opened in the main valve body so that the hydraulic oil of first oil outlet is logical by the water conservancy diversion
Road flow to the main valve plug with the direction towards balancing spring push against the main valve plug and part by the throttling duct；
The pilot valve includes：
Guide valve blocks offer the second oil inlet and the second oil outlet；So the second oil inlet is directly or indirectly
With the throttling hole link, second oil outlet with the fuel tank of the hydraulic system for being connected to；
Pilot valve, it is set in the guide valve blocks；
Pilot mechanism is used to make the pilot valve to block second oil inlet with predetermined pressure；
Driving mechanism is set on the main valve body, and the active driving mechanisms are used for according to first oil inlet
And/or the actual pressure of the hydraulic oil of first oil outlet and the rated pressure of hydraulic system selectively drive the main valve
Core.
Preferably, the valve gear further includes control mechanism, first pressure sensor and second sensor；Wherein；
The first pressure sensor and the second sensing device correspond to the first oil inlet for being installed in the main valve body and the
One oil outlet, to be respectively used to measure the actual pressure of first oil inlet and first oil outlet；
The both ends of the main valve plug are respectively arranged with the first drive rod and the second drive rod made of permeability magnetic material；
The active driving mechanisms include the first electromagnet and the second electromagnet；
First electromagnet and second electromagnet include cyclic annular iron core and are around on the cyclic annular iron core
Coil；First drive rod and second drive rod are respectively corresponding to least a portion of stretch to first electromagnet and institute
In the cyclic annular iron core for stating the second electromagnet；
The control mechanism includes processor and controller；
So processor is electrically connected respectively with the first pressure sensor and second pressure sensor to obtain described
The actual pressure of one oil inlet and the first oil outlet；The processor is also stored with the rated pressure of hydraulic system；The processing
The actual pressure is compared with the rated pressure and obtains comparison result by device；
The controller is electrically connected with the processor, and the controller is used to obtain the comparison result of processor, and root
It is selectively controlled to first electromagnet and second electromagnet energization according to the comparison result；Wherein：The selection
Property control to first electromagnet and second electromagnet energization refer to：Individually it is powered to first electromagnet, or
Person is individually powered to the second electromagnet, or is not powered to the first electromagnet and the second electromagnet.
Preferably, the actual pressure deviates the degree of the rated pressure and is passed through between the current strength of the coil
It is increasing function to be formed by functional relation.
Preferably, the valve gear is pressure reducing valve.
Preferably, the valve gear is pressure charging valve.
Preferably, second oil inlet passes through the directed cavity and the throttling hole link.
Preferably, the pilot mechanism includes guide's spring for pushing against the pilot valve.
Preferably, the pilot mechanism further includes the first conductive magnet that the pilot valve is pushed against by magnetic force.
Further include above-mentioned valve gear the invention also discloses a kind of hydraulic system, including executive component and system pipeline,
First oil inlet of the valve gear is connected to the system pipeline, the first oil outlet and the executive component of the valve gear
Connection.
Compared with prior art, the advantageous effect of valve gear disclosed by the invention and hydraulic system is：The valve dress of the present invention
Set active driving mechanisms be used for pressure occur larger fluctuation when, active drive main valve plug so that main valve plug quick sliding with
Quickly adjustment passage section, to make the pressure of the first oil outlet quickly return, to reduce the hydraulic pressure of the first oil outlet
The degree of fluctuation of the pressure of oil, makes that the pressure can maintain rated pressure needed for executive component normal operation or its is attached
Closely.
Description of the drawings
Fig. 1 is the flow chart of the pressure regulating method disclosed in this invention based on valve gear.
Fig. 2 is the simple diagram (pressure residing for valve gear for the valve gear that pressure regulating method disclosed in this invention is based on
Power state is：P1-P1o>PA；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is
Second rated pressure, PA are that the first preset pressure is poor, and PB is that the second preset pressure is poor).
Fig. 3 is the simple diagram (pressure residing for valve gear for the valve gear that pressure regulating method disclosed in this invention is based on
Power state is：P1-P1o<PA；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is
Second rated pressure, PA are that the first preset pressure is poor, and PB is that the second preset pressure is poor).
Fig. 4 is the simple diagram (pressure residing for valve gear for the valve gear that pressure regulating method disclosed in this invention is based on
Power state is：P1o-P1>PA, and P2o<P1<P1o；P1 is the first actual pressure, and P2 is the first actual pressure, P1o first
Rated pressure, P2o are the second rated pressure, and PA is that the first preset pressure is poor, and PB is that the second preset pressure is poor).
Fig. 5 is the simple diagram (pressure residing for valve gear for the valve gear that pressure regulating method disclosed in this invention is based on
Power state is：P1<P2o；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, P2o the
Two rated pressures, PA are that the first preset pressure is poor, and PB is that the second preset pressure is poor).
Fig. 6 is the simple diagram (pressure residing for valve gear for the valve gear that pressure regulating method disclosed in this invention is based on
Power state is：P2-P2o>PB；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is
Second rated pressure, PA are that the first preset pressure is poor, and PB is that the second preset pressure is poor).
Fig. 7 is the simple diagram (pressure residing for valve gear for the valve gear that pressure regulating method disclosed in this invention is based on
Power state is：P2-P2o<PB；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is
Second rated pressure, PA are that the first preset pressure is poor, and PB is that the second preset pressure is poor).
Fig. 8 is the simple diagram (pressure residing for valve gear for the valve gear that pressure regulating method disclosed in this invention is based on
Power state is：P2o-P2>PB；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is
Second rated pressure, PA are that the first preset pressure is poor, and PB is that the second preset pressure is poor).
Fig. 9 is the simple diagram (pressure residing for valve gear for the valve gear that pressure regulating method disclosed in this invention is based on
Power state is：P2o-P2<PB；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is
Second rated pressure, PA are that the first preset pressure is poor, and PB is that the second preset pressure is poor).
Figure 10 is that (pressure state residing for valve gear is for the structural schematic diagram of valve gear disclosed in this invention：P1-P1o>
PA；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is the second rated pressure, and PA is
First preset pressure is poor, and PB is that the second preset pressure is poor).
Figure 11 is that (pressure state residing for valve gear is for the structural schematic diagram of valve gear disclosed in this invention：P1-P1o<
PA；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is the second rated pressure, and PA is
First preset pressure is poor, and PB is that the second preset pressure is poor).
Figure 12 is that (pressure state residing for valve gear is for the structural schematic diagram of valve gear disclosed in this invention：P1o-P1>
PA, and P2o<P1<P1o；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, P2o second
Rated pressure, PA are that the first preset pressure is poor, and PB is that the second preset pressure is poor).
Figure 13 is that (pressure state residing for valve gear is for the structural schematic diagram of valve gear disclosed in this invention：P1<P2o；
P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is the second rated pressure, PA the
One preset pressure is poor, and PB is that the second preset pressure is poor).
Figure 14 is that (pressure state residing for valve gear is for the structural schematic diagram of valve gear disclosed in this invention：P2-P2o>
PB；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is the second rated pressure, and PA is
First preset pressure is poor, and PB is that the second preset pressure is poor).
Figure 15 is that (pressure state residing for valve gear is for the structural schematic diagram of valve gear disclosed in this invention：P2-P2o<
PB；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is the second rated pressure, and PA is
First preset pressure is poor, and PB is that the second preset pressure is poor).
Figure 16 is that (pressure state residing for valve gear is for the structural schematic diagram of valve gear disclosed in this invention：P2o-P2>
PB；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is the second rated pressure, and PA is
First preset pressure is poor, and PB is that the second preset pressure is poor).
Figure 17 is that (pressure state residing for valve gear is for the structural schematic diagram of valve gear disclosed in this invention：P2o-P2<
PB；P1 is the first actual pressure, and P2 is the first actual pressure, and P1o is the first rated pressure, and P2o is the second rated pressure, and PA is
First preset pressure is poor, and PB is that the second preset pressure is poor).
In figure：
100- main valves；10- main valve bodies；The first oil inlets of 11-；The first oil outlets of 12-；13- directed cavities；14- water conservancy diversion is logical
Road；20- main valve plugs；The first drive rods of 21-；The second drive rods of 22-；23- throttlings duct；30- passage sections；The first electromagnetism of 40-
Body；The second electromagnets of 50-；60- control mechanisms；70- first pressure sensors；80- second pressure sensors；90- balancing springs；
200- pilot valves；210- guide valve blocks；The second oil inlets of 211-；The second oil outlets of 212-；213- pilot valves；214- guide
Mechanism.
Specific implementation mode
To make those skilled in the art be better understood from technical scheme of the present invention, below in conjunction with the accompanying drawings and specific embodiment party
Formula elaborates to the present invention.
Embodiment of the invention discloses that a kind of pressure regulating method based on valve gear, the pressure regulating method is for working as
The pressure of hydraulic system where valve gear occurs to adjust pressure in time when larger fluctuation, which is pressure charging valve or subtracts
Pressure valve, the valve gear include main valve 100, pilot valve 200 and the active driving mechanisms being installed on main valve, and main valve 100 includes
Main valve body 10 and the main valve plug 20 being set in main valve body 10；Main valve body 10 offers oil inlet 11 and oil outlet 12, oil inlet
Mouth 11 is connected to the system pipeline of hydraulic system, and oil outlet 12 is connected to the executive component in hydraulic system, the pressure adjusting side
Method especially for load of the pressure oscillation to executive component and by executive component driving of hydraulic system influence, also for holding
Units and the influence for loading generated machine power fluctuation and the pressure to hydraulic oil, such as Fig. 1 simultaneously combines Fig. 2 to Fig. 9 institutes
Show, which includes：
Obtain rated pressure set in hydraulic system.In this step, set in the acquisition hydraulic system
Rated pressure can obtain the rated pressure of hydraulic system pipeline being connected to oil inlet 11, the first rated pressure might as well be claimed
P1o；Can also be the executive component that acquisition is connected to oil outlet 12 specified operating pressure (under specified operating pressure,
Executive component and load being capable of normal operations), the second rated pressure P2o might as well be claimed.
Obtain the actual pressure in hydraulic system.In this step, the actual pressure in the acquisition hydraulic system can
To be the actual pressure for the oil inlet 11 for obtaining main valve body 10, the first actual pressure P1 might as well be claimed；It can also be acquisition main valve
The actual pressure of the oil outlet 12 of body 10 might as well claim the second actual pressure P2.
Actual pressure is set to be compared with rated pressure to obtain comparison result.In this step, make actual pressure and volume
The mode that constant-pressure is compared can there are many, for example, keeping the first actual pressure and the first rated pressure and/or second specified
Pressure carries out size comparison；And/or the second actual pressure is made to be compared with the second rated pressure and/or the first rated pressure；
And/or it is compared with preset pressure difference after so that the first actual pressure is made difference with first rated pressure；And/or make second
Actual pressure is compared after making difference with the second rated pressure with preset pressure difference.Above-mentioned manner of comparison is also needed according to oil inlet 11
With the actual pressure of oil outlet 12 and the departure degree of rated pressure and deviateed rated pressure be the first actual pressure or
The second actual pressure of person carries out comprehensive determination.
According to comparison result choose whether by active driving mechanisms drive main valve plug 20 with change oil inlet 11 with it is fuel-displaced
Passage section 30 between mouth 12.In this step, when the comparison result of above-mentioned a variety of manner of comparison shows actual pressure and volume
Constant-pressure deviate it is larger when, using active driving mechanisms driving active spool slide so that actual pressure be quickly adjusted to it is specified
Pressure or its near.
It should be noted that：
1, the purpose of above-mentioned adjusting method mainly for the pressure oscillation at oil inlet 11 and oil outlet 12 to executive component
And the influence of load, it should be appreciated that the purpose of the adjusting method also fluctuates including executive component self-operating and causes oil outlet
Pressure at 12 generates the influence that fluctuation feeds back to the operation of executive component again.
2, so-called pressure oscillation is construed as：Actual pressure deviates the process of rated pressure suddenly, and should not be construed as
The process that actual pressure slowly deviates, so-called unexpected deviation should be using 1/10th or less the times of second grade as standard.
3, it is that oil outlet 12 or 12 pressure of oil outlet unilateral pressure oscillation occur that adjusting method proposed by the present invention, which is directed to,
Situation.
Before introducing the advantageous effect of pressure regulating method of the present invention, when prime minister introduces active driving mechanisms and does not intervene,
The course of work of valve gear and its in hydraulic system to the effect of executive component.Valve gear can be pressure charging valve, can also
It is pressure reducing valve, is introduced by taking pressure reducing valve as an example.
The hydraulic oil of system enters main valve body 10 by the oil inlet 11 of valve gear, and is flowed out from oil outlet 12, into fuel-displaced
The bottom that hydraulic oil at mouth 12 enters main valve plug 20 by flow-guiding channel 14 simultaneously pushes against main valve plug 20 and passes through the duct that throttles
23 and pilot valve outflow, keep 30 size of passage section permanent at this point, main valve plug 20 is maintained under the promotion of the hydraulic oil of bottom
Fixed position, so that the pressure of hydraulic oil generates pressure drop, this makes the pressure drop of the fluid oil at oil outlet 12 in throttling duct 23
It is low and be maintained at a stable pressure, to make the hydraulic oil of hydraulic system pressure reduction and stablize in the drop after valve gear
Low pressure value.And after the pressure of the hydraulic oil of hydraulic system changes, the pressure at oil outlet 12 can change, so
Afterwards, primary spools 20 are made to move by the hydraulic oil of flow-guiding channel 14, to make the size of passage section 30 change so that fuel-displaced
The pressure of mouthfuls 12 hydraulic oil revert to the pressure value before variation, such executive component can the constant pressure value (at this time
Pressure value is the rated pressure value of executive component normal operation, that is, the second rated pressure value) normal operation.
However, when (pressure of the hydraulic system includes the liquid at oil inlet 11 or oil outlet 12 for the pressure of hydraulic system
The pressure of pressure oil) when changing in a short time, that is, when generating fluctuation so that the hydraulic oil of oil outlet 12 also quickly occurs
Variation, and the hydraulic oil for passing through flow-guiding channel 14 can not quickly push main valve plug 20 quickly to change passage section 30 to use
The hydraulic oil of hydraulic fluid port 12 quickly revert to the specified pressure value of executive component normal operation, can make the pressure of oil outlet 12 in this way
Variation synchronous with the generation of the pressure of hydraulic system, or fluctuation.Similarly there is such case in pressure charging valve.
The pressure regulating method of the present invention is for solving the above problem existing for above-mentioned pressure reducing valve or pressure charging valve.
As described above, (either oil outlet 12 or oil inlet when larger fluctuation occurs in the pressure in hydraulic system
Mouth 11 fluctuates), fast reaction is made to be directed to pressure oscillation using active driving mechanisms active drive main valve plug 20, so that
Main valve plug 20 accelerates sliding quickly to change the size of passage section 30, so that the pressure of the hydraulic oil at oil outlet 12 is quickly returned
The multiple rated pressure (that is, second rated pressure) to executive component normal operation, and then reduce the pressure wave at oil outlet 12
It is dynamic.
Method provided by the present invention utilizes active driving mechanisms active drive main valve plug 20, to reduce oil outlet 12
Pressure oscillation, so as to reduce influence of the pressure oscillation to executive component to the greatest extent.
The different situations that pressure oscillation occurs for oil inlet 11 or oil outlet 12, by taking valve gear is pressure reducing valve as an example in detail
Illustrate pressure regulating method.
Before introducing adjusting method, it there is no harm in class definition comparison result, when manner of comparison is the first actual pressure and the
When one rated pressure and the second rated pressure are compared, comparison result becomes the first comparison result；When manner of comparison is
When second actual pressure is compared with the second rated pressure and the first rated pressure, comparison result compares knot as second
Fruit.
Specific adjusting method is described below
Situation one：
As shown in Fig. 2, when the first comparison result is that the first actual pressure is more than the first rated pressure, and the first actual pressure
When pressure difference between the first rated pressure is more than the first preset pressure difference PA, main valve plug 20 is driven using active driving mechanisms
So that main valve plug 20 is moved towards the direction that passage section 30 reduces；
As shown in figure 3, when the first comparison result is that the first actual pressure is more than the first rated pressure, and the first actual pressure
When pressure difference between the first rated pressure is less than the first preset pressure difference, active driving mechanisms is made to remain static.
The above situation is specifically interpreted as：Pressure at the oil inlet 11 of main valve body 10 increases suddenly, and the increased amount of institute
When larger (pressure increase is using the first preset pressure difference as standard), then, active driving mechanisms active drive main valve is utilized
Core 20, and the increment of the pressure of hydraulic oil at oil outlet 12 and speedup is made to reduce, so that pressure is quickly returned to first at this
Rated pressure or its near.And the increased amount of pressure institute at oil inlet 11 it is smaller when, increased pressure will not be to fuel-displaced
12 pressure of mouth cause big influence, it is therefore not necessary to drive main valve plug 20 using active driving mechanisms, drive and lead merely with hydraulic oil
Spool 20 to change passage section 30.
Situation two：
As shown in figure 4, when for the first actual pressure to be more than second less than the first rated pressure specified for the first comparison result
Pressure, and the pressure difference between the first rated pressure and the first actual pressure be more than the first preset pressure difference when, utilize actively drive
Motivation structure drives main valve plug 20 so that main valve plug 20 is moved towards 30 increased direction of passage section；
When the first comparison result is that the first actual pressure is less than the first rated pressure, and the first rated pressure and the first reality
When pressure difference between pressure is less than the first preset pressure difference, active driving mechanisms is made to remain static.
As shown in figure 5, when the first comparison result is that the first actual pressure is less than the second rated pressure, make active drive machine
Structure remains static.
The above situation is specifically interpreted as：When pressure at oil inlet 11 reduces suddenly, and the larger (pressure of amount reduced
Reduction amount is using the first preset pressure difference as standard), then, using active driving mechanisms active drive main valve plug 20, and use
The slippage and decrease speed of the pressure of hydraulic fluid port 12 quickly reduce, so as to be quickly returned to second specified for the pressure at oil outlet 12
Pressure or its near.And amount that the pressure at oil inlet 11 is reduced it is smaller when, the pressure reduced will not be to outlet pressure
Big influence is caused, it is therefore not necessary to drive main valve plug 20 using active driving mechanisms, main valve plug 20 is driven merely with hydraulic oil
To change passage section 30.And the amount of the reduction at oil inlet 11 makes the actual pressure at oil inlet 11 be less than second
When rated pressure, illustrate the insufficient pressure of the system pipeline of hydraulic system to meet the requirement of executive component, needs at least instantaneous
The flow of hydraulic oil in system pipeline is improved to increase the pressure at oil inlet 11, is led at this point, being driven using active driving mechanisms
Spool 20 can not change the second rated pressure for making oil outlet 12 be returned to executive component normal operation, therefore, make actively to drive
Motivation structure keeps not driving the stationary state of active spool.
Situation three：
As shown in fig. 6, when the second comparison result is that the second actual pressure is more than the second rated pressure and specified less than first
Pressure, and the pressure difference between the second actual pressure and the second rated pressure be more than the second preset pressure difference PB when, utilize actively
Driving mechanism drives main valve plug 20 so that main valve plug 20 is moved towards the direction that passage section 30 reduces；
As shown in fig. 7, when the second comparison result is that the second actual pressure is more than the second rated pressure, and the second actual pressure
When pressure difference between the second rated pressure is less than the second preset pressure difference, active driving mechanisms is made to remain static.
The above situation is specifically interpreted as：(pressure at oil outlet 12 increases when pressure at oil outlet 12 increases suddenly
Majority is caused by executive component self-operating, for example, the load that executive component is driven increases suddenly), and the increased amount of institute compared with
(pressure increase is using the second preset pressure difference as standard) greatly, then, using active driving mechanisms active drive main valve plug 20,
To reduce the amount by passage section 30 to the greatest extent, to reduce the amount by oil outlet 12, and then make the hydraulic pressure at oil outlet 12
The pressure of oil is returned to the rated pressure of executive component normal operation.And the amount that the pressure at oil outlet 12 is reduced is smaller
When, the pressure at oil outlet 12 does not generate larger fluctuation, and the influence of the smaller pressure oscillation to executive component is little, because
This, drives main valve plug 20 without using active driving mechanisms, changes the position of main valve plug 20 merely with hydraulic oil, logical to change
Flow section 30.
Situation four：
As shown in figure 8, when the second comparison result is that the second actual pressure is less than the second rated pressure, and the second rated pressure
When pressure difference between the second actual pressure is more than the second preset pressure difference, using active driving mechanisms drive main valve plug 20 with
Main valve plug 20 is set to be moved towards 30 increased direction of passage section；
As shown in figure 9, when the second comparison result is that the second actual pressure is less than the second rated pressure, and the second rated pressure
When pressure difference between the second actual pressure is less than the second preset pressure difference, active driving mechanisms is made to remain static.
The above situation is specifically interpreted as：Pressure at oil outlet 12 reduce suddenly (pressure reduce suddenly majority by executing
Element self-operating causes, such as the load that executive component is driven reduces suddenly), and larger (the pressure reduction of the amount reduced
Amount is using the second preset pressure difference as standard) when, using active driving mechanisms active drive main valve plug 20, and make passage section 30
Increase, to increase the flow by oil outlet 12, and then so that the pressure at oil outlet 12 is quickly returned to executive component and normally transport
The required rated pressure of row, to meet executive component normal operation.And the amount of the reduction at oil outlet 12 it is smaller when, illustrate
Pressure oscillation at hydraulic fluid port 12 is little, and main valve plug 20 is driven without using active driving mechanisms.
The tool for different adjusting 12 pressure of oil outlet that the pressure regulating method of the present invention is provided for above-mentioned four kinds of situations
Body strategy is maintained at rated pressure needed for executive component substantially so that big fluctuation will not occur for the pressure of oil outlet 12
Or near rated pressure.
The above-mentioned pressure regulating method of the present invention is not only able to make executive component normal operation, and can reduce or avoid
Executive component and entire hydraulic system are reduced because of the impact to the other component of hydraulic system caused by pressure oscillation
Noise caused by each element movement, and the load driven to executive component has protective effect.
One embodiment of the present of invention also discloses a kind of valve gear, which is used to reducing or avoiding pressure oscillation
Influence caused by operation to executive component, to enable executive component normal operation near rated pressure or its.
As shown in Figure 10 to 17, and combine Fig. 1 to Fig. 9, the valve gear, including main valve 100 and pilot valve 200.
Main valve 100 includes main valve body 10, main valve plug 20, balancing spring 90, flow-guiding channel 14.Pilot valve 200 includes guide
Valve body 210, pilot valve 213, pilot mechanism 214 and active driving mechanisms.
Directed cavity 13 is offered in main valve body 10, and 11 He of the first oil inlet of perforation directed cavity 13 is offered on main valve body 10
First oil outlet 12, the first oil inlet 11 are connected to the system pipeline in hydraulic system, in the first oil outlet 12 and hydraulic system
Executive component connection；Main valve plug 20 is set in directed cavity 13 and can be slided along directed cavity 13 to change the first oil inlet
Passage section 30 between mouth 11 and the first oil outlet 12；Main valve plug 20 offer axially through throttling duct 23；Equilibrium bomb
Spring 90 is set in directed cavity 13 and for pushing down on to main valve plug 20；Flow-guiding channel 14 is opened in main valve body 10 so that first
Hydraulic oil at oil outlet 12 is pushed up by flow-guiding channel 14 to main valve plug 20 and by the duct 23 that throttles.
Guide valve blocks 210 offer the second oil inlet 211 and the second oil outlet 212；Second oil inlet 211 directly or
It is connected to indirectly with throttling duct 23, the second oil outlet 212 is for the fuel tank with hydraulic system；Pilot valve 213 is set to guide
In valve body 210；Pilot mechanism 214 is for making pilot valve 213 block the second oil inlet 211 with predetermined pressure；Active drive machine
Structure is set on main valve, and driving mechanism is used for the reality according to the hydraulic oil at the first oil inlet 11 and/or the first oil outlet 12
The rated pressure of pressure and hydraulic system selectively driving main valve plug 20.
The valve gear of above-described embodiment can be used as pressure reducing valve or pressure charging valve uses.It is now introduced using for as pressure reducing valve above-mentioned
The operation principle of valve gear：
The system pipeline for making the first oil inlet 11 access hydraulic system, make the first oil outlet 12 and hydraulic system executes member
Part is connected to, which loads for driving, and certainly, the operating condition of executive component is also by load effect.Work as system pipeline
In hydraulic oil entered in main valve body 10 by the first oil inlet 11 with the rated pressure of hydraulic system after, from the of main valve body 10
The outflow of one oil outlet 12 is to enter in executive component and drive executive component to drive loaded work piece, the portion at the first oil outlet 12
Liquid separation pressure oil flow to 20 bottom of main valve plug by flow-guiding channel 14, on the one hand which passes through duct 23, the guide valve blocks of throttling
210 the second oil inlet 211 and force pilot valve 213 open the second oil inlet 211, then, hydraulic oil enters guide valve blocks
210, then, pressure drop is generated, in hydraulic oil behind the duct 23 that throttles to make master from the second oil outlet 212 reflux fuel tank
The pressure of the hydraulic oil of 20 upper end of spool is less than the pressure of the hydraulic oil of its bottom；On the other hand, the liquid of 20 bottom of main valve plug
Pressure oil pushes against the sliding of main valve plug 20 so that main valve plug 20 moves up to a certain position, at this point, balancing spring 90 and main valve plug
The hydraulic oil of 20 tops is flat to the active force of main valve plug 20 to the active force of main valve plug 20 and the hydraulic oil of 20 bottom of main valve plug
Weighing apparatus, accordingly, the size of passage section 30 determine so that constant (perseverance of pressure of the hydraulic oil at the first oil outlet 12
Fixed pressure becomes the rated pressure of executive component normal work), and less than the pressure at the first oil inlet 11.When the first oil inlet
The pressure of hydraulic oil at mouthfuls 11 because certain reason changes (for example, system pipeline because other control elements, executive component,
Dynamical element changes and makes pressure) or the first oil outlet 12 at pressure (such as executed because certain reason changes
Element operating status, load operation conditions change make pressure change) when, the hydraulic oil of the bottom of main valve plug 20 can become
Change, 20 stress balance of main valve plug is broken so that main valve plug 20 moves, to make passage section 30 change again, to make the
The pressure of pressure being returned to before variation at one oil outlet 12, so as to make executive component be run under normal pressure.
However, when the pressure of the first oil inlet 11 and first outlet oil generates larger fluctuation, the liquid of 20 bottom of main valve plug
Pressure oil can not quickly drive main valve plug 20 to keep the pressure at the first oil outlet 12 fast in turn with the corresponding passage section 30 that changes
Speed returns, this pressure for being bound to cause the first oil outlet 12 also generates larger fluctuation, to influence the normal fortune of executive component
Row, and then influence load.
The case where generating larger fluctuation under pressure, valve gear of the invention obtains active driving mechanisms for being sent out in pressure
When raw larger fluctuation, active drive main valve plug 20 so that 20 quick sliding of main valve plug is quickly to adjust passage section 30, to make
The pressure of first oil outlet 12 quickly returns, to reduce the hydraulic oil at the first oil outlet 12 pressure degree of fluctuation,
Make the pressure can maintain rated pressure needed for executive component normal operation or its near.
In a preferred embodiment of the invention, as shown in Figure 10 to 17, valve gear further includes control mechanism 60, first
Pressure sensor 70 and second sensor；Wherein；First pressure sensor 70 and second sensor correspondence are installed in main valve body
10 the first oil inlet 11 and the first oil outlet 12, to be respectively used to measure the reality of the first oil inlet 11 and the first oil outlet 12
Pressure；The first drive rod 21 and the second drive rod 22 made of magnetic material is respectively set in the both ends of main valve plug 20；Actively drive
Motivation structure includes the first electromagnet 40 and the second electromagnet 50；First electromagnet 40 and the second electromagnet 50 include cyclic annular iron core
And it is around in the coil on cyclic annular iron core；First drive rod 21 and the second drive rod 22 are respectively corresponding to least a portion of stretch to
In the cyclic annular iron core of one electromagnet 40 and the second electromagnet 50；Control mechanism 60 includes processor and controller；Processor is distinguished
It is electrically connected with first pressure sensor 70 and second pressure sensor 80 to obtain the first oil inlet 11 and the first oil outlet 12
Actual pressure；Processor is stored with the rated pressure of hydraulic system；Actual pressure is compared by processor with rated pressure；Control
Device processed is electrically connected with processor, and controller is used to obtain the comparison result of processor, and according to comparison result selectively to the
One electromagnet 40 and the second electromagnet 50 are powered.Wherein：It is to the first electromagnet 40 and the energization of the second electromagnet 50 selectively
Refer to：It is individually powered to the first electromagnet 40, either individually to the energization of the second electromagnet 50 or not to 40 He of the first electromagnet
Second electromagnet 50 is powered.
According to above-described embodiment it is found that valve gear disclosed by the invention is when facing actual pressure generation larger fluctuation, always
Can make the hydraulic oil at the first oil outlet 12 be quickly returned to executive component normal operation rated pressure or near.Root below
The adjusting method of valve gear answering pressure fluctuation is described in detail according to pressure oscillation situation, and illustrates the valve gear of the present invention with this
Advantageous effect.
Clearly to illustrate adjusting method, separation definition might as well be carried out to above-mentioned actual pressure and rated pressure, with
The above-mentioned pressure regulating method definition of disclosure of the invention is consistent.
The rated pressure for the hydraulic system pipeline being connected to the first oil inlet 11 claims the first rated pressure；With the first oil outlet
The specified operating pressure of the executive component of 12 connections claims the second rated pressure；Reality at first oil inlet 11 of main valve body 10
Border pressure claims the first actual pressure；The actual pressure of first oil outlet 12 of main valve body 10 claims the second actual pressure；Wherein first
Actual pressure is measured by first pressure sensor 70 and is obtained, and the second actual pressure is measured by second pressure sensor 80 and obtained.
Valve gear is really according to the first actual pressure and the second actual pressure and the first rated pressure and the second specified pressure
The comparison result of power come be adjusted and make the second actual pressure return, wherein the comparison between each pressure parameter is by handling
Device carries out operation to obtain comparison result, controller according to comparison result come control the first electromagnet 40 and the second electromagnet 50 with
Active driving mechanisms are made to realize the driving to main valve plug 20.
Valve gear is when being connected between system pipeline and executive component for facing four kinds of pressure oscillation situations.For this four
Kind fluctuation situation, valve gear is for using different regulative modes.
Situation one：
It is obtained as shown in Figure 10 when the first comparison result that processor is calculated is that first pressure sensor 70 is measured
The first actual pressure arrived is more than the first rated pressure, and the pressure difference between the first actual pressure and the first rated pressure is more than
When the first preset pressure difference, controller, which controls power supply and is powered to the first electromagnet 40, (while making the second magnet remain powered off shape
State) to drive 20 slide downward of main valve plug to reduce the area of passage section 30 by the first drive rod 21；
As shown in figure 11, when the first comparison result that processor is calculated is measured by first pressure sensor 70
The first obtained actual pressure is more than the first rated pressure, and the pressure difference between the first actual pressure and the first rated pressure is small
When the first preset pressure difference, controller control power supply makes the first magnet and the second magnet remain powered off state simultaneously, that is, unfavorable
Main valve plug 20 is driven with active driving mechanisms.
The above situation is specifically interpreted as：When pressure at the oil inlet of main valve body 10 increases suddenly, and the increased amount of institute
Larger (pressure increase is using the first preset pressure difference as standard) then utilizes 40 active drive main valve plug of the first electromagnet
20, and the increment of the pressure of the hydraulic oil of oil outlet and speedup is made to reduce, so as to be quickly returned to first specified for pressure at this
Pressure or its near.And the increased amount of pressure institute at oil inlet it is smaller when, increased pressure will not be to oil outlet pressure
Big influence is caused, it is therefore not necessary to drive main valve plug 20 using active driving mechanisms, changes main valve plug 20 merely with hydraulic oil
Position, to change passage section 30.
Situation two：
As shown in figure 12, it is to be obtained measured by first pressure sensor 70 when the first comparison result is calculated in processor
The first actual pressure arrived is more than the second rated pressure, and the first rated pressure and the first practical pressure less than the first rated pressure
When pressure difference between power is more than the first preset pressure difference, controller, which controls power supply and is powered to the first electromagnet 40, (while making the
Two magnets remain powered off state) to drive 20 slide downward of main valve plug to reduce the face of passage section 30 by the first drive rod 21
Product.
It is the first reality obtained measured by first pressure sensor 70 when the first comparison result is calculated in processor
Pressure is less than the first rated pressure, and the pressure difference between the first rated pressure and the first actual pressure is less than the first preset pressure
When poor, controller control power supply makes the first magnet and the second magnet remain powered off state simultaneously, that is, does not utilize active driving mechanisms
Drive main valve plug 20.
As shown in figure 13, when the first comparison result that processor is calculated is measured by first pressure sensor 70
When the first obtained actual pressure is less than the second rated pressure, controller control power supply simultaneously protects the first magnet and the second magnet
Off-position is held, active driving mechanisms is not utilized to drive main valve plug 20.
The above situation is specifically interpreted as：When pressure at oil inlet reduces suddenly, and the amount that is reduced is larger that (pressure subtracts
In a small amount using the first preset pressure difference as standard), then, using 40 active drive main valve plug 20 of the first electromagnet, and make fuel-displaced
Mouthful pressure slippage and decrease speed quickly reduce so that the pressure of oil outlet be quickly returned to the second rated pressure or
Near it.And amount that the pressure at oil inlet is reduced it is smaller when, the pressure that reduces will not cause outlet pressure big
It influences, it is therefore not necessary to drive main valve plug 20 using active driving mechanisms, the logical to change of main valve plug 20 is driven merely with hydraulic oil
Flow section 30.And the amount of the reduction at oil inlet make the actual pressure at oil inlet be less than the second rated pressure when,
Illustrate the insufficient pressure of the system pipeline of hydraulic system to meet the requirement of executive component, needs at least instantaneously to improve system pipeline
The flow of interior hydraulic oil is to increase the pressure at oil inlet, at this point, can not be changed using active driving mechanisms driving main valve plug 20
Become the rated pressure for making oil outlet return executive component, therefore, active driving mechanisms is not utilized to drive main valve plug 20..
Situation three：
As shown in figure 14, it is to be obtained measured by second pressure sensor 80 when the second comparison result is calculated in processor
The second actual pressure arrived is more than the second rated pressure and is less than the first rated pressure, and the second actual pressure and the second specified pressure
When pressure difference between power is more than the second preset pressure difference, controller, which controls power supply and is powered to the first electromagnet 40, (while making the
Two magnets remain powered off state) to drive 20 slide downward of main valve plug to reduce the face of passage section 30 by the first drive rod 21
Product；
As shown in figure 15, it is to be obtained measured by second pressure sensor 80 when the second comparison result is calculated in processor
The second actual pressure arrived is more than the second rated pressure, and the pressure difference between the second actual pressure and the second rated pressure is less than
When the second preset pressure difference, controller control power supply makes the first magnet and the second magnet remain powered off state simultaneously, that is, does not utilize
Active driving mechanisms drive main valve plug 20..
The above situation is specifically interpreted as：When the pressure of oil outlet increases suddenly, (pressure of oil outlet increases most
Caused by executive component self-operating, for example, the load that executive component is driven increases suddenly), and the larger (pressure of the increased amount of institute
Power increase is using the second preset pressure difference as standard), 40 active drive main valve plug 20 of the first electromagnet is then utilized, to the greatest extent
Amount reduces the amount by passage section 30, to reduce the amount by oil outlet, and then the pressure of the hydraulic oil of oil outlet is made to return
Return to the rated pressure of executive component normal operation.And when the amount that the pressure of oil outlet is reduced is smaller, oil outlet
Pressure does not generate larger fluctuation, and influence of the pressure oscillation to executive component is little, it is therefore not necessary to utilize active driving mechanisms
Main valve plug 20 is driven, changes the position of main valve plug 20 merely with hydraulic oil, to change passage section 30.
Situation four：
As shown in figure 16, when the second comparison result that processor is calculated is measured by second pressure sensor 80
The second obtained actual pressure is less than the second rated pressure, and the pressure difference between the second rated pressure and the second actual pressure is big
When the second preset pressure difference, controller, which controls power supply and is powered to the second electromagnet 50, (while making the first magnet remain powered off shape
State) to drive 20 upward sliding of main valve plug to increase the area of passage section 30 by the second drive rod 22；
As shown in figure 17, when the second comparison result that processor is calculated is measured by second pressure sensor 80
The second obtained actual pressure is less than the second rated pressure, and the pressure difference between the second rated pressure and the second actual pressure is small
When the second preset pressure difference, active driving mechanisms is not utilized to drive main valve plug 20.
The above situation is specifically interpreted as：When the pressure of oil outlet reduces suddenly, (pressure reduces majority by executing member suddenly
Part self-operating causes, such as the load that executive component is driven reduces suddenly), and the larger (pressure decrease amount of amount reduced
Using the second preset pressure difference as standard) when, using 50 active drive main valve plug 20 of the second electromagnet, and make passage section 30
Increase, to increase the flow by oil outlet, and then the pressure of oil outlet is made quickly to be returned to executive component normal operation institute
The rated pressure needed, to meet executive component normal operation.And when the amount of the reduction of oil outlet is smaller, illustrate oil outlet
Pressure oscillation it is little, without using active driving mechanisms drive main valve plug 20.
The specific strategy for the different adjusting oil outlet pressure that the valve gear of the present invention is provided for above-mentioned four kinds of situations, from
And make the pressure of oil outlet that big fluctuation will not occur, it is maintained at rated pressure or rated pressure needed for executive component substantially
Near.
The valve gear of the present invention is not only able to make executive component normal operation, and executive component and entire can occur
Hydraulic system is reduced because of the impact to the other component of hydraulic system caused by pressure oscillation produced by each element movement
Noise.And the load driven to executive component has protective effect.
It should be noted that：First preset pressure difference and the second preset pressure difference are experience setting value, this is first default
Pressure difference can be 0.25 times or so of the first rated pressure；Second preset pressure difference can be 0.3 times or so of the second rated pressure.
In a preferred embodiment of the invention, actual pressure deviates the degree of rated pressure and is passed through the electric current of coil
It is increasing function that functional relation is formed by between intensity.That is, pressure difference between actual pressure and rated pressure with it is pre-
If the difference between pressure difference is bigger, the corresponding current strength for being passed through coil is bigger.
Above-mentioned valve gear drives the benefit of spool using electromagnetism as two electromagnets of the benefit of driving power and setting
It is：
1, electromagnetism is stronger as the sensitivity of driving force, when facing fluctuation situation, needs using highly sensitive driving
Mechanism, so that drive response acts the time much smaller than fluctuation with occupancy of occupied time.
2, the present invention is not limited using electromagnetic drive as active driving mechanisms, however, one as the present invention is excellent
Gesture is that in the prior art, also have there are the means that electromagnet drives spool using electromagnetism as the power of driving active spool,
However, in the prior art, being on the one hand to be used for pilot valve 213 using electromagnet driving spool, being specifically to make to pilot valve
Core 213 blocks certain pretightning force of valve port, and effect is to set the opening force of pilot valve 213；On the other hand, electromagnet drives
For movable valve plug for making spool move to the other end from one end, purpose is not joint hydraulic oil to change the face of passage section 30
Product, but hydraulic oil is made to achieve the purpose that commutation.And the present invention electromagnet be for combine with hydraulic oil to main valve plug 20 with
Power-assisted, and main valve plug 20 is made to accelerate motion, and it is instantaneous that electromagnet, which gives the driving force of main valve plug 20, the time is specifically les than the second
/ 10th of grade, are then followed by revocation.
3, according to above-mentioned valve gear adjusting method it is found that using two electromagnets and the difference on effect for using an electromagnet
It is very big, according to an electromagnet, although can realize the driving of the both direction of main valve plug 20 by the positive and negative switching of electric current,
However, the positive anti-switching of electric current can lead to the sluggishness that magnetic field is converted, this can cause the conversion frequency of driving force to be less than pressure oscillation
Frequency, this makes the deterioration of sensitivity that valve gear reacts, and can not be made by both forward and reverse directions switching electric current using two electromagnets
It is high for the reaction sensitivity of pressure oscillation to obtain valve gear.
In a preferred embodiment of the invention, as shown in Figure 10, the second oil inlet 211 passes through directed cavity 13 and throttling
Duct 23 is connected to.
In a preferred embodiment of the invention, pilot mechanism 214 includes the guide for pushing against pilot valve 213
Spring, it is preferable that pilot mechanism 214 further includes the first conductive magnet that pilot valve 213 is pushed against by magnetic force, elder generation's conductive magnet
It is used in combination or is used alone with guide's spring to push against pilot valve 213.
The invention also discloses a kind of hydraulic system, including executive component and system pipeline, above-mentioned valve gear, valve gears
The first oil inlet 11 be connected to system pipeline, the first oil outlet 12 of valve gear is connected to executive component.
Above example is only exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (9)
1. a kind of valve gear, which is characterized in that including main valve and pilot valve；
The main valve includes：
Main valve body inside offers directed cavity, and the first oil inlet for penetrating through the directed cavity and are offered on the main valve body
One oil outlet, first oil inlet are connected to the system pipeline in hydraulic system, first oil outlet and the hydraulic pressure system
Executive component connection in system；
Main valve plug is set in the directed cavity and can be slided along the directed cavity to change first oil inlet and institute
State the passage section between the first oil outlet；The main valve plug offer axially through throttling duct；
Balancing spring is set in the directed cavity and for pushing against the main valve plug；
Honeycomb duct is opened in the main valve body so that the hydraulic oil of first oil outlet passes through the flow-guiding channel stream
To the main valve plug with the direction towards balancing spring push against the main valve plug and part by the throttling duct；
The pilot valve includes：
Guide valve blocks offer the second oil inlet and the second oil outlet；So the second oil inlet directly or indirectly with institute
Throttling hole link is stated, second oil outlet with the fuel tank of the hydraulic system for being connected to；
Pilot valve, it is set in the guide valve blocks；
Pilot mechanism is used to make the pilot valve to block second oil inlet with predetermined pressure；
Driving mechanism is set on the main valve body, the active driving mechanisms be used for according to first oil inlet and/or
The actual pressure of the hydraulic oil of first oil outlet and the rated pressure of hydraulic system selectively drive the main valve plug.
2. the valve gear of adjusting according to claim 2, which is characterized in that the valve gear further includes control mechanism,
One pressure sensor and second sensor；Wherein；
The first oil inlet and first that the first pressure sensor and the second sensing device correspondence are installed in the main valve body goes out
Hydraulic fluid port, to be respectively used to measure the actual pressure of first oil inlet and first oil outlet；
The both ends of the main valve plug are respectively arranged with the first drive rod and the second drive rod made of permeability magnetic material；
The active driving mechanisms include the first electromagnet and the second electromagnet；
First electromagnet and second electromagnet are including cyclic annular iron core and the coil being around on the cyclic annular iron core；
First drive rod and second drive rod are respectively corresponding to least a portion of stretch to first electromagnet and described
In the cyclic annular iron core of two electromagnets；
The control mechanism includes processor and controller；
So processor be electrically connected respectively with the first pressure sensor and second pressure sensor with obtain described first into
The actual pressure of hydraulic fluid port and the first oil outlet；The processor is also stored with the rated pressure of hydraulic system；The processor will
The actual pressure is compared with the rated pressure and obtains comparison result；
The controller is electrically connected with the processor, and the controller is used to obtain the comparison result of processor, and according to institute
Comparison result is stated selectively to control to first electromagnet and second electromagnet energization；Wherein：It is described selectively
It controls to first electromagnet and second electromagnet energization and refers to：Individually it is powered to first electromagnet, Huo Zhedan
It is solely powered to the second electromagnet, or is not powered to the first electromagnet and the second electromagnet.
3. the valve gear of adjusting according to claim 2, which is characterized in that the actual pressure deviates the rated pressure
Degree and be passed through between the current strength of the coil that be formed by functional relation be increasing function.
4. valve gear according to claim 2, which is characterized in that the valve gear is pressure reducing valve.
5. valve gear according to claim 2, which is characterized in that the valve gear is pressure charging valve.
6. valve gear according to claim 1, which is characterized in that second oil inlet by the directed cavity with it is described
Throttle hole link.
7. valve gear according to claim 1, which is characterized in that the pilot mechanism includes for pushing against the pilot valve
Guide's spring of core.
8. valve gear according to claim 1, which is characterized in that the pilot mechanism further include pushed against by magnetic force described in
The first conductive magnet of pilot valve.
9. a kind of hydraulic system, including executive component and system pipeline, which is characterized in that further include as appointed in claim 1 to 8
Valve gear described in meaning one, the first oil inlet of the valve gear are connected to the system pipeline, and the first of the valve gear
Oil outlet is connected to the executive component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810323618.XA CN108488455A (en) | 2018-04-11 | 2018-04-11 | Valve gear and hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810323618.XA CN108488455A (en) | 2018-04-11 | 2018-04-11 | Valve gear and hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN108488455A true CN108488455A (en) | 2018-09-04 |
Family
ID=63315577
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810323618.XA Pending CN108488455A (en) | 2018-04-11 | 2018-04-11 | Valve gear and hydraulic system |
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| CN (1) | CN108488455A (en) |
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| CN110559515A (en) * | 2019-09-09 | 2019-12-13 | 青岛大学附属医院 | drug delivery device for anesthetic |
| WO2020191730A1 (en) * | 2019-03-28 | 2020-10-01 | 深圳市大疆创新科技有限公司 | Pump device and agricultural plant protection machine |
| CN114439786A (en) * | 2021-12-30 | 2022-05-06 | 江苏盛鑫气动液压设备有限公司 | Small-sized hydraulic magnesium forging system |
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Application publication date: 20180904 |