CN105201946B - Load sensing system Multifunctional load stimulation pressure-control valve - Google Patents
Load sensing system Multifunctional load stimulation pressure-control valve Download PDFInfo
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- CN105201946B CN105201946B CN201510655963.XA CN201510655963A CN105201946B CN 105201946 B CN105201946 B CN 105201946B CN 201510655963 A CN201510655963 A CN 201510655963A CN 105201946 B CN105201946 B CN 105201946B
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Abstract
The present invention announces a kind of load sensing hydraulic system Multifunctional load stimulation pressure-control valve.Including oil inlet LS1, oil-out LS2 and drain tap L；The oil inlet LS1 is connected with filter；The filter other end is connected to unidirectional filtering valve and constant flow rate valve, and the unidirectional filtering valve other end is connected to oil-out LS2, and the constant flow rate valve other end is connected to oil inlet L；The constant flow rate valve two ends are parallel with an electric proportional pressure control valve.The present invention is simple and reliable for structure, I＆M is convenient；By installing the valve between load sensing banked direction control valves and variable main pump, the security reliability of load sensing hydraulic system and the stability of response are improved, widened the range of application of Load sensing system, improve the security of main frame.
Description
Technical field
The present invention relates to a kind of valve module of hydraulic means, a kind of many work(of load sensing hydraulic system are related in particular to
Can load pressure control valve.
Background technology
In modern project machinery hydraulic system, for energy-saving consideration, load sensing hydraulic system is widely applied,
And security reliability, the stability requirement more and more higher of the response to system.To the load feedback of load sensing banked direction control valves pickup
The control of pressure is influence system security reliability, the key factor of stability, directly affects the performance of whole machine.It is existing negative
There are the following problems for lotus sensor-based system:（1）, filled without filtering on feedback pipe between load sensing banked direction control valves and variable main pump
Put, the pollutant of the possibility residual inside working connection（Machining iron filings, particle etc.）The servo for often damaging variable main pump becomes
Measuring mechanism；（2）, lack in a non-operative state, No Load Start protection engine, can prevent from causing because of artificial incorrect operation again
Executive component misoperation function；（3）Although, the load sensing banked direction control valves feedback pressure that can realize in a non-operative state
Off-load, but the general mode for taking valve inner feedback pressure mouthful to lead directly to main oil return opening, off-load are too fast, and variation main pump is oblique
The stability of disk response, and then influence the stability of system；（4）, between load sensing banked direction control valves and variable main pump install tubular type additional
One-way throttle valve is filtered, and filter effect is poor, and readily in response to delayed.Such case can cause main frame cannot normal work,
May cause larger security incident when serious.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of load sensing hydraulic system Multi-function pressure control valve.
The present invention is achieved through the following technical solutions：A kind of Load sensing system Multifunctional load stimulation pressure-control valve, including
Oil inlet LS1, oil-out LS2 and drain tap L；The oil inlet LS1 is connected with filter；The filter other end connects respectively
Unidirectional filtering valve and constant flow rate valve are connected to, the unidirectional filtering valve other end is connected to oil-out LS2, and the constant flow rate valve other end is connected to
Oil inlet L；The constant flow rate valve two ends are parallel with an electric proportional pressure control valve.
It is further：The constant flow rate valve two ends are also parallel with a solenoid directional control valve.
The Load sensing system Multifunctional load stimulation pressure-control valve also includes valve body；The valve body two ends open up respectively into
Hydraulic fluid port LS1 and oil-out LS2, offers feedback pressure feedback working connection between oil inlet LS1 and oil-out LS2；The oil-feed
Installed in mouth LS1 and the unidirectional filtering valve is installed in the filter, the oil-out LS2；The feedback pressure feeds back main oil
Road side offer respectively with the feedback pressure branch oil circuit I that connects of feedback working connection and branch oil circuit II；Branch's oil circuit I
The other end offer electric proportional pressure control valve mounting hole, electric proportional pressure control valve is installed in electric proportional pressure control valve mounting hole；Described point
The other end of branch oil circuit II is offered installs constant flow rate valve in constant flow rate valve mounting hole, constant flow rate valve mounting hole；The constant flow
Vent line is offered between valve mounting hole and drain tap L；Offered between the electric proportional pressure control valve mounting hole and vent line and let out
Leakage technique working connection.
The filter includes joint and the screen pack being fixed on joint；The joint is fixed on valve body oil inlet LS1
In against feedback pressure feed back working connection port position.
Described filter screen is circular filter net；It is two grades of cylinders of step that the joint is cylindrical, and endoporus has matches somebody with somebody with filter screen
The groove and through hole of conjunction；The filter screen riveting is in joint.
The unidirectional filtering valve includes the valve seat being fixed in oil-out LS2；Cone valve is installed, outside valve seat in the valve seat
End is provided with damping screw I；Damping screw II is installed inside the cone valve, is provided between cone valve rear end and oil-out LS2 bottoms
Spring I；Sealing ring I is provided between the valve seat inner face and oil-out LS2 bottoms.
The oil-out LS2 is provided with internal thread；The valve seat is cylindrical to be provided with external screw thread and chamfering, outer one section of valve seat endoporus
Internal thread is provided with, valve seat the inner is provided with stepped counterbore, and valve seat inner face is provided with a circle deep gouge；The cone valve is cylindrical with valve seat endoporus
One end of cooperation is cone, and the one end near oil-out LS2 bottoms is cylinder, has ring between cone valve surrounding and valve seat endoporus
Shape passage, is provided with one section of internal thread in the middle part of cone valve endoporus, cone valve is provided with stepped counterbore near one end of oil-out LS2 bottoms；
There is damping hole at the damping screw I centers, cylindrical to have external screw thread, and damping screw I is connected through a screw thread and is fixed on valve seat endoporus；
There is damping hole at the damping screw II centers, cylindrical to have external screw thread, and damping screw II is connected through a screw thread and is fixed on cone valve endoporus
Middle part；Described spring I one end is arranged in cone valve stepped counterbore, and the other end is against oil-out LS2 bottoms；The sealing ring I
In the deep gouge on valve seat inner face.
The constant flow rate valve includes the damping screw III, the constant current that are sequentially arranged at from inside to outside in constant flow rate valve mounting hole
Amount valve element, spring II, spring base and adjustment seat；The spring base is slidably matched with constant flow rate valve mounting hole, spring base surrounding with
Sealing ring II is provided between constant flow rate valve mounting hole inwall；The adjustment seat is fixed on constant flow rate valve and installs outer end of hole, adjustment seat
Center is provided with screwed hole, and adjusting screw is provided with adjustment seat screwed hole；Described adjusting screw the inner is against spring base outer end,
Adjusting screw outer end is provided with fixing nut.
The constant flow rate valve mandrel heart is provided with axially extending bore, axially extending bore connection constant flow valve element oil inlet end and spring terminal；
Constant flow valve element is cylindrical to be provided with the balancing slit and valve port control flume for reducing hydraulic card clamping force；Also it is provided with constant flow valve element radially equal
The aperture of cloth, aperture one end connection constant flow valve element oil inlet end, the cylindrical valve port control flume of other end connection constant flow valve element, and
Connected with the vent line of valve body by valve port control flume；Constant flow rate valve core axially extending bore the inner is provided with internal thread, damping screw III
There is damping hole at center, cylindrical to have external screw thread, and damping screw III is fixed on constant flow valve element near branch's oil circuit II port positions.
Described electric proportional pressure control valve and solenoid directional control valve for regulating load feedback pressure are to can be directly mounted at valve body
On standard component.
Meaning of the present invention is that modern project machinery (crane, pump truck etc.) closes core load sensing hydraulic system to system
Response security reliability, stability requirement more and more higher.The present invention can be with：（1）, lifting system security reliability:①
The load sensing pressure oil that load sensing hydraulic system banked direction control valves is picked up is filtered by filter, prevents contaminants
The servo variable mechanism of variable main pump；2. by electric proportional pressure control valve（Or solenoid directional control valve）Can be to load sensing hydraulic system
Load feedback pressure be controlled, it is possible to achieve in a non-operative state, No Load Start protection engine again can be with for engine
Prevent because of executive component misoperation caused by artificial incorrect operation；3. load sensing hydraulic system can be realized by constant flow rate valve
Under off working state, load feedback pressure automatic deloading, it is to avoid load sensing main pump still pressure oil output causes system to suppress
Pressure；（2）Hydraulic pressure by-pass throttle filtering system is constituted by unidirectional filtering valve and constant flow rate valve, to lotus sensing hydraulic system banked direction control valves
The load sensing pressure of pickup is filtered and voltage stabilizing, it is ensured that the stability of Load sensing system response.
The present invention is simple and reliable for structure, I＆M is convenient；By between load sensing banked direction control valves and variable main pump
The valve is installed, the security reliability of load sensing hydraulic system and the stability of response is improved, Load sensing system has been widened
Range of application, improve the security of main frame.
Brief description of the drawings
Fig. 1 is hydraulic schematic diagram of the present invention；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is left view in Fig. 2；
Fig. 4 is A-A direction views in Fig. 3；
Fig. 5 be I in Fig. 4 at enlarged drawing；
Fig. 6 be II in Fig. 4 at enlarged drawing；
Fig. 7 be III in Fig. 4 at enlarged drawing；
Fig. 8 is the hydraulic schematic diagram when present invention is applied in load sensing hydraulic system.
In figure：1st, valve is unidirectionally filtered；2nd, filter；3rd, constant flow rate valve；4th, electric proportional pressure control valve；5th, solenoid directional control valve.6、
Screen pack；7th, joint；8th, oil inlet LS1；9th, feedback pressure feedback working connection；10th, branch's oil circuit I；11st, branch's oil circuit II；12、
Oil-out LS2；13rd, vent line；14th, drain tap L；15th, valve body；16th, technique working connection is leaked；17th, constant flow rate valve mounting hole；
18th, electric proportional pressure control valve mounting hole；19th, the auxiliary oil circuit I of leakage technique；20th, ball rises plug；21st, the auxiliary oil circuit II of leakage technique；22、
Damping screw III；23rd, constant flow valve element；24th, spring II；25th, sealing ring II；26th, spring base；27th, sealing ring III；28th, adjust
Section seat；29th, fixing nut；30th, adjusting screw；31st, electric proportional pressure control valve；32nd, damping screw I；33rd, valve seat；34th, cone valve；35、
Damping screw II；36th, spring I；37th, sealing ring I.38th, hydraulic jack；39th, load sensing banked direction control valves；40th, Multifunctional load stimulation pressure
Force control valve；41st, variable main pump.
Specific embodiment
The following is a specific embodiment of the invention, in conjunction with accompanying drawing, the invention will be further described.
As shown in figure 1, a kind of Load sensing system Multifunctional load stimulation pressure-control valve,；Oil inlet LS18 is connected with filtering
Device 2；The other end of filter 2 is connected to unidirectional filtering valve 1 and constant flow rate valve 3, and the unidirectional filtering other end of valve 1 is connected to fuel-displaced
Mouth LS212, the other end of constant flow rate valve 3 is connected to drain tap L14；The two ends of constant flow rate valve 3 are parallel with an electric proportional pressure control valve 4.
The two ends of constant flow rate valve 3 are also parallel with a solenoid directional control valve 5, in actual applications, electric proportional pressure control valve 4 and solenoid directional control valve 5
Also one of them can only be selected.As shown in figure 8, Load sensing system Multifunctional load stimulation pressure-control valve 40 is arranged on load sensing
Between banked direction control valves 39 and variable main pump 41；When hydraulic jack 38 is in running order（Stretch out or reclaim）When, load feedback pressure
Enter the oil inlet LS1 of Load sensing system Multifunctional load stimulation pressure-control valve 40 from load sensing banked direction control valves 39, then from load
The oil-out LS2 of sensor-based system Multifunctional load stimulation pressure-control valve 40 is passed to the spring cavity of the servo variable mechanism of variable main pump 41
Pass, and then control variables main pump is according to the pressure and traffic demand fuel feeding of hydraulic jack.
As shown in Figures 2 to 4, the two ends of the valve body 15 open up oil inlet LS18 and oil-out LS212, oil inlet respectively
Feedback pressure feedback working connection 9 is offered between LS18 and oil-out LS212；The filter is installed in the oil inlet LS18
The unidirectional filtering valve 1 is installed in 2, the oil-out LS212；Feedback pressure feedback working connection 9 side offers difference
With the feedback pressure branch oil circuit I10 that connects of feedback working connection 9 and branch oil circuit II11；The other end of branch's oil circuit I10
Offer and installed in electric proportional pressure control valve mounting hole 18, electric proportional pressure control valve mounting hole 18 electric proportional pressure control valve 4；Branch's oil
The other end of road II11 is offered installs constant flow rate valve 3 in constant flow rate valve mounting hole 17, constant flow rate valve mounting hole 17；The constant current
Vent line 13 is offered between amount valve mounting hole 17 and drain tap L14；The electric proportional pressure control valve mounting hole 18 and vent line 13
Between offer leakage technique working connection 16.As shown in figure 3, leakage technique working connection 16 is connected by leaking the auxiliary oil circuit I19 of technique
Pass-out oil circuit 13, leakage technique working connection 16 connects electric proportional pressure control valve mounting hole, leakage by leaking the auxiliary oil circuit II21 of technique
It is fitted with ball on technique working connection 16, leakage technique auxiliary oil circuit II21, the auxiliary oil circuit I19 of leakage technique to rise plug 20, ball rises stifled
First 20 is standard component, can be directly mounted at valve body（15）On, for plugging technology oil circuit.
With reference to Fig. 2 to Fig. 4, and shown in Fig. 5, filter 2 includes joint 7 and the screen pack 6 being fixed on joint 7；Institute
State during joint 7 is fixed on the oil inlet LS18 of valve body 15 and feed back the port position of working connection 9 against feedback pressure.Filter screen 6 is circular mistake
Filter screen；It is two grades of cylinders of step that the joint 7 is cylindrical, and endoporus has the groove and through hole coordinated with filter screen 6；The riveting of the filter screen 6
It is pressed in joint 7.
With reference to Fig. 2 to Fig. 4, and shown in Fig. 6, unidirectional filtering valve 1 includes the valve seat 33 being fixed in oil-out LS212；
Cone valve 34 is installed in the valve seat 33, the outer end of valve seat 33 is provided with damping screw I32；Damping spiral shell is installed inside the cone valve 34
Nail II35, spring I36 is provided between the rear end of cone valve 34 and oil-out LS212 bottoms；The inner face of the valve seat 33 and oil-out
Sealing ring I37 is provided between LS212 bottoms.Oil-out LS212 is provided with internal thread；The valve seat 33 is cylindrical to be provided with external screw thread and falls
Angle, outer one section of the endoporus of valve seat 33 is provided with internal thread, and the inner of valve seat 33 is provided with stepped counterbore, and the inner face of valve seat 33 is provided with a circle and sinks
Groove；It is cone with the inner hole of valve seat 33 one end that the cone valve 34 is cylindrical, and the one end near oil-out LS212 bottoms is round
Cylinder, there is circular passage between the surrounding of cone valve 34 and the endoporus of valve seat 33, one section of internal thread, cone valve are provided with the middle part of the endoporus of cone valve 34
34 are provided with stepped counterbore near one end of oil-out LS212 bottoms；There is damping hole at the damping screw I32 centers, cylindrical to have outer
Screw thread, damping screw I32 is connected through a screw thread and is fixed on the endoporus of valve seat 33；There is damping hole at the damping screw II35 centers,
Cylindrical to have external screw thread, damping screw II35 is connected through a screw thread the middle part for being fixed on the endoporus of cone valve 34；Spring I36 one end peace
In the stepped counterbore of cone valve 34, the other end is against oil-out LS212 bottoms；It is inner that the sealing ring I37 is arranged on valve seat 33
In deep gouge on face.
With reference to Fig. 2 to Fig. 4, and shown in Fig. 7, constant flow rate valve 3 includes being sequentially arranged at constant flow rate valve installation from inside to outside
Damping screw III22, constant flow valve element 23, spring II24, spring base 26 and adjustment seat 28 in hole 17；The spring base 26 with
Constant flow rate valve mounting hole 17 is slidably matched, and spring base 26 is two grades of cylinders, has sealing in the one-level Excircle machining being relatively large in diameter
Groove, is provided with sealing ring II25 in seal groove；The adjustment seat 28 is fixed on the outer end of constant flow rate valve mounting hole 17, the center of adjustment seat 28
Screwed hole is provided with, adjusting screw 30 is installed in the screwed hole of adjustment seat 28, adjustment seat is provided with the flange of radial direction, and flange is matched somebody with somebody with valve body
Conjunction face is machined with seal groove, and sealing ring III27 is arranged in the flange face sealing groove of adjustment seat 28；In described adjusting screw 30
End is against the outer end of spring base 26, and the outer end of adjusting screw 30 is provided with fixing nut 29, the fixing nut 29, adjusting screw of adjustment seat 28
The decrement of 30 composition adjusting means regulation spring II24.The axle center of constant flow valve element 23 is provided with axially extending bore, axially extending bore connection
The oil inlet end of constant flow valve element 23 and spring terminal；Constant flow valve element 23 is cylindrical to be provided with the balancing slit and valve port control for reducing hydraulic card clamping force
Groove processed；The aperture of radial equipartition is also provided with constant flow valve element 23, aperture one end connects the oil inlet end of constant flow valve element 23, the other end
The cylindrical valve port control flume of connection constant flow valve element 23, and connected with the vent line 13 of valve body 15 by valve port control flume；Constant current
Amount valve element 23 axially extending bore the inner is provided with internal thread, and there is damping hole at damping screw III22 centers, cylindrical to have external screw thread, damp spiral shell
Nail III22 is fixed on constant flow valve element 23 near branch's oil circuit II11 port positions.
Electric proportional pressure control valve 4 and solenoid directional control valve 5 for regulating load feedback pressure are to can be directly mounted at valve body 15
On standard component.
With reference to shown in Fig. 8, load feedback pressure is by oil inlet LS1 and then passes through filter 2, then by feedback pressure
Feedback working connection 9 separates 3 tunnels；1 tunnel is become by unidirectional filtering valve 1, the servo for then connecting variable main pump 41 by oil-out LS2
The spring cavity of measuring mechanism；Then 1 tunnel connects drain tap L, towards hydraulic oil container by constant flow rate valve 3 by vent line 13；1 tunnel
By electric proportional pressure control valve 4 [or solenoid directional control valve 5], then by leak the auxiliary oil circuit II21 of technique, leakage technique working connection 16,
The leakage auxiliary oil circuit I19 of technique, connects drain tap L, towards hydraulic oil container.
Function one（The load sensing pressure oil that load sensing hydraulic system banked direction control valves is picked up was carried out by filter
Filter, prevents the servo variable mechanism of contaminants variable main pump）Implementation method：When load pressure feedback fluid from oil inlet
LS1 to oil-out LS2 and drain tap L flow when, the screen pack 6 of filter 2 can be timely filtering inside working connection
The pollutant that may be remained（Machining iron filings, particle etc.）.
Function two is [by electric proportional pressure control valve（Or solenoid directional control valve）Can be to the load feedback of load sensing hydraulic system
Pressure is controlled, it is possible to achieve in a non-operative state, No Load Start protection engine can be prevented because artificial engine again
Executive component misoperation caused by maloperation] implementation method：As described above -- 1 tunnel passes through electric proportional pressure control valve 4 [or electromagnetism
Reversal valve 5], then by leaking the auxiliary oil circuit II21 of technique, leakage technique working connection 16, the leakage auxiliary oil circuit I19 of technique, connection is let out
Hydraulic fluid port 14, towards hydraulic oil container；I.e. load feedback pressure is controlled by electric proportional pressure control valve 4 [or solenoid directional control valve 5], by control
Device command signal, you can the manual or automatic control off-load or regulation of feedback pressure are realized, so as to realize function two.
Function three（Under load sensing hydraulic system off working state being realized by constant flow rate valve, load feedback pressure
Automatic deloading, it is to avoid load sensing main pump still pressure oil output, causes system to build the pressure）Implementation method：
As described above -- then 1 tunnel connects drain tap L, towards hydraulic oil container by constant flow rate valve 3 by vent line 13；
I.e. when hydraulic jack 38 is in off working state, load feedback pressure oil from the damping screw III22 of constant flow rate valve 3,
The endoporus 23 of constant flow valve element then by vent line 13 connect drain tap 14, towards hydraulic oil container, realize function three；
Function four（Hydraulic pressure by-pass throttle filtering system is constituted by unidirectional filtering valve 1 and constant flow rate valve, to lotus sensing hydraulic
The load sensing pressure of system multi-channel valve pickup is filtered and voltage stabilizing, it is ensured that the stability of Load sensing system response）Reality
Apply mode：When load pressure feedback fluid flows to variable main pump 41 and transmit load by unidirectional filtering valve 1, oil-out LS2
During feedback pressure, fluid connects hydraulic oil container by constant flow rate valve 3 simultaneously；The pressure oscillation of load feedback pressure oil is unidirectional
Filter 2 damping holes filtering of the damping screw II35 and damping screw I32 of valve 1（The peak of pressure oscillation and low ebb）It is same
When, the load feedback pressure oil liquid of another part constant flow rate lasting damping screw III22, constant current from constant flow rate valve 3
Measure the endoporus 23 of valve element 23 and then drain tap L is connected by vent line 13, be diverted to hydraulic oil container；Unidirectional filtering valve 1 and constant current
The amount composition hydraulic pressure by-pass throttle filtering system of valve 3, is filtered and voltage stabilizing to load sensing pressure；Constant flow rate shunts embodiment party
Formula：When fluid flows from damping screw III, the front and rear pressure difference of the damping hole of damping screw III keeps constant by spring II.Root
According to the pressure difference-discharge characteristic of damping hole, the damping hole of damping screw III is held essentially constant by flow.
Claims (9)
1. a kind of Load sensing system Multifunctional load stimulation pressure-control valve, it is characterised in that：Including oil inlet LS1（8）, oil-out
LS2（12）With drain tap L（14）；The oil inlet LS1（8）It is connected with filter（2）；The filter（2）The other end is distinguished
It is connected with unidirectional filtering valve（1）And constant flow rate valve（3）, unidirectionally filter valve（1）The other end is connected to oil-out LS2（12）, constant current
Amount valve（3）The other end is connected to drain tap L（14）；The constant flow rate valve（3）Two ends are parallel with an electric proportional pressure control valve（4）；
The Load sensing system Multifunctional load stimulation pressure-control valve also includes valve body（15）；The valve body（15）Two ends open up respectively into
Hydraulic fluid port LS1（8）With oil-out LS2（12）, oil inlet LS1（8）With oil-out LS2（12）Between offer feedback pressure feedback master
Oil circuit（9）；The oil inlet LS1（8）It is interior that the filter is installed（2）, the oil-out LS2（12）It is interior that the unidirectional filter is installed
Ripple valve（1）；The feedback pressure feeds back working connection（9）Side offers feeds back working connection with feedback pressure respectively（9）Connection
Branch oil circuit I（10）With branch oil circuit II（11）；Branch's oil circuit I（10）The other end offer electric proportional pressure control valve and install
Hole（18）, electric proportional pressure control valve mounting hole（18）It is interior that electric proportional pressure control valve is installed（4）；Branch's oil circuit II（11）The other end
Offer constant flow rate valve mounting hole（17）, constant flow rate valve mounting hole（17）Interior installation constant flow rate valve（3）；The constant flow rate valve is installed
Hole（17）With drain tap L（14）Between offer vent line（13）；The electric proportional pressure control valve mounting hole（18）With vent line
（13）Between offer leakage technique working connection（16）.
2. Load sensing system Multifunctional load stimulation pressure-control valve according to claim 1, it is characterised in that：The constant current
Amount valve（3）Two ends are also parallel with a solenoid directional control valve（5）.
3. Load sensing system Multifunctional load stimulation pressure-control valve according to claim 1, it is characterised in that：The filtering
Device（2）Including joint（7）Be fixed on joint（7）On screen pack（6）；The joint（7）It is fixed on valve body（15）Oil inlet
LS1（8）In against feedback pressure feed back working connection（9）Port position.
4. Load sensing system Multifunctional load stimulation pressure-control valve according to claim 3, it is characterised in that：Described filter
Net（6）It is circular filter net；The joint（7）Cylindrical is two grades of cylinders of step, and endoporus has and filter screen（6）The groove of cooperation and
Through hole；The filter screen（6）Riveting is in joint（7）It is interior.
5. Load sensing system Multifunctional load stimulation pressure-control valve according to claim 3, it is characterised in that：It is described unidirectional
Filtering valve（1）Including being fixed on oil-out LS2（12）Interior valve seat（33）；The valve seat（33）Cone valve is inside installed（34）, valve
Seat（33）Outer end is provided with damping screw I（32）；The cone valve（34）Inside is provided with damping screw II（35）, cone valve（34）Rear end
With oil-out LS2（12）Spring I is provided between bottom（36）；The valve seat（33）Inner face and oil-out LS2（12）Bottom it
Between be provided with sealing ring I（37）.
6. Load sensing system Multifunctional load stimulation pressure-control valve according to claim 5, it is characterised in that：It is described fuel-displaced
Mouth LS2（12）It is provided with internal thread；The valve seat（33）It is cylindrical to be provided with external screw thread and chamfering, valve seat（33）Outer one section of endoporus is provided with
Internal thread, valve seat（33）The inner is provided with stepped counterbore, valve seat（33）Inner face is provided with a circle deep gouge；The cone valve（34）It is cylindrical with
Valve seat（33）One end of inner hole is cone, near oil-out LS2（12）One end of bottom is cylinder, cone valve（34）Four
Week and valve seat（33）There are circular passage, cone valve between endoporus（34）One section of internal thread, cone valve are provided with the middle part of endoporus（34）It is close to
Oil-out LS2（12）One end of bottom is provided with stepped counterbore；The damping screw I（32）There is damping hole at center, cylindrical to have outer spiral shell
Line, damping screw I（32）It is connected through a screw thread and is fixed on valve seat（33）On endoporus；The damping screw II（35）There is damping at center
Hole, it is cylindrical to have external screw thread, damping screw II（35）It is connected through a screw thread and is fixed on cone valve（34）The middle part of endoporus；The spring I
（36）One end is arranged on cone valve（34）In stepped counterbore, the other end is against oil-out LS2（12）Bottom；The sealing ring I（37）
Installed in valve seat（33）In deep gouge on inner face.
7. Load sensing system Multifunctional load stimulation pressure-control valve according to claim 3, it is characterised in that：The constant current
Amount valve（3）Including being sequentially arranged at constant flow rate valve mounting hole from inside to outside（17）Interior damping screw III（22）, constant flow valve element
（23）, spring II（24）, spring base（26）And adjustment seat（28）；The spring base（26）With constant flow rate valve mounting hole（17）Slide
Coordinate, spring base（26）Surrounding and constant flow rate valve mounting hole（17）Sealing ring II is provided between inwall（25）；The adjustment seat
（28）It is fixed on constant flow rate valve mounting hole（17）Outer end, adjustment seat（28）Center is provided with screwed hole, adjustment seat（28）In screwed hole
Adjusting screw is installed（30）；Described adjusting screw（30）The inner is against spring base（26）Outer end, adjusting screw（30）Outer end
Fixing nut is installed（29）.
8. Load sensing system Multifunctional load stimulation pressure-control valve according to claim 7, it is characterised in that：The constant current
Amount valve element（23）Axle center is provided with axially extending bore, axially extending bore connection constant flow valve element（23）Oil inlet end and spring terminal；Constant flow rate valve
Core（23）It is cylindrical to be provided with the balancing slit and valve port control flume for reducing hydraulic card clamping force；Constant flow valve element（23）On be also provided with radially
The aperture of cloth, aperture one end connection constant flow valve element（23）Oil inlet end, other end connection constant flow valve element（23）Cylindrical valve port
Control flume, and by valve port control flume and valve body（15）Vent line（13）Connection；Constant flow valve element（23）Axially extending bore is inner
It is provided with internal thread, damping screw III（22）There is damping hole at center, cylindrical to have external screw thread, damping screw III（22）It is fixed on constant current
Amount valve element（23）Close branch's oil circuit II（11）Port position.
9. a kind of Load sensing system Multifunctional load stimulation pressure-control valve according to claim 2, it is characterised in that：For
The described electric proportional pressure control valve of regulating load feedback pressure（4）And solenoid directional control valve（5）It is that can be directly mounted at valve body（15）On
Standard component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510655963.XA CN105201946B (en) | 2015-10-13 | 2015-10-13 | Load sensing system Multifunctional load stimulation pressure-control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510655963.XA CN105201946B (en) | 2015-10-13 | 2015-10-13 | Load sensing system Multifunctional load stimulation pressure-control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105201946A CN105201946A (en) | 2015-12-30 |
| CN105201946B true CN105201946B (en) | 2017-06-27 |
Family
ID=54949823
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510655963.XA Expired - Fee Related CN105201946B (en) | 2015-10-13 | 2015-10-13 | Load sensing system Multifunctional load stimulation pressure-control valve |
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| Country | Link |
|---|---|
| CN (1) | CN105201946B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989840A (en) * | 2017-11-23 | 2018-05-04 | 宁波文泽机电技术开发有限公司 | A kind of damping control valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894925B (en) * | 2020-07-07 | 2022-05-10 | 南京中船绿洲机器有限公司 | Hydraulic integrated control safety valve group for anchor twisting equipment |
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| CN101725589A (en) * | 2009-11-11 | 2010-06-09 | 北京市三一重机有限公司 | Hydraulic system and rotary drilling rig comprising same |
| CN101748969A (en) * | 2009-12-23 | 2010-06-23 | 三一重型装备有限公司 | Hydraulic control loop used for jackdrill and control system thereof |
| CN102588357A (en) * | 2011-12-20 | 2012-07-18 | 徐州重型机械有限公司 | Load sensitive hydraulic system and crane with hydraulic system |
| CN102747949A (en) * | 2012-07-19 | 2012-10-24 | 山河智能装备股份有限公司 | Fast propulsion hydraulic control loop of down-the-hole drill rig |
| CN103671336A (en) * | 2013-12-12 | 2014-03-26 | 中联重科股份有限公司 | Load-sensitive hydraulic system and power matching control method, device and system |
| CN104047917A (en) * | 2014-06-23 | 2014-09-17 | 柳州柳工液压件有限公司 | Flow distributor for construction machine |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725589A (en) * | 2009-11-11 | 2010-06-09 | 北京市三一重机有限公司 | Hydraulic system and rotary drilling rig comprising same |
| CN101748969A (en) * | 2009-12-23 | 2010-06-23 | 三一重型装备有限公司 | Hydraulic control loop used for jackdrill and control system thereof |
| CN102588357A (en) * | 2011-12-20 | 2012-07-18 | 徐州重型机械有限公司 | Load sensitive hydraulic system and crane with hydraulic system |
| CN102747949A (en) * | 2012-07-19 | 2012-10-24 | 山河智能装备股份有限公司 | Fast propulsion hydraulic control loop of down-the-hole drill rig |
| CN103671336A (en) * | 2013-12-12 | 2014-03-26 | 中联重科股份有限公司 | Load-sensitive hydraulic system and power matching control method, device and system |
| CN104047917A (en) * | 2014-06-23 | 2014-09-17 | 柳州柳工液压件有限公司 | Flow distributor for construction machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107989840A (en) * | 2017-11-23 | 2018-05-04 | 宁波文泽机电技术开发有限公司 | A kind of damping control valve |
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| CN105201946A (en) | 2015-12-30 |
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