CN106949110B - A kind of pump flow stabilizing valve - Google Patents
A kind of pump flow stabilizing valve Download PDFInfo
- Publication number
- CN106949110B CN106949110B CN201710229322.7A CN201710229322A CN106949110B CN 106949110 B CN106949110 B CN 106949110B CN 201710229322 A CN201710229322 A CN 201710229322A CN 106949110 B CN106949110 B CN 106949110B
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- China
- Prior art keywords
- valve
- valve core
- steady flow
- flow
- steady
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- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 18
- 230000006641 stabilisation Effects 0.000 claims abstract description 22
- 238000011105 stabilization Methods 0.000 claims abstract description 22
- 239000000446 fuel Substances 0.000 description 3
- 206010020852 Hypertonia Diseases 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention discloses a kind of pump flow stabilizing valves, oil inlet and oil return opening including valve body, in valve body, the current stabilization spring cavity and output circuit being connected with oil inlet are additionally provided in valve body, that is slided in current stabilization spring cavity is equipped with steady flow valve core, steady flow valve core is equipped with piston section, which is set between the oil return opening and oil inlet；It is associated with flow stabilizing valve seat on the valve body at steady flow valve core rear, resetting spring is equipped between steady flow valve core and current stabilization valve seat；Restriction is equipped in output circuit, the output circuit at restriction rear is connected with the current stabilization spring cavity at steady flow valve core rear by connecting hole, and blind hole is set in steady flow valve core back segment, is equipped with pressure limiting valve in blind hole, blind hole leading portion is connected by radial hole with oil return opening.The present invention may make output flow kept stable in oil pump feed amount and hydraulic system load variations, meet the requirement of host stabilized (steady-state) speed and steering stability, it is ensured that the normal work of host.
Description
Technical field
The present invention relates to a kind of flow stabilizing valve, especially a kind of pump flow stabilizing valve.
Background technology
Currently, in the case of oil pump feed amount and hydraulic system load variations, output flow can change therewith,
It can not ensure the regime flow needed for hydraulic system, it is difficult to meet the requirement of host stabilized (steady-state) speed and steering stability, it can not be true
Protect host normal work.
Invention content
The purpose of the present invention is being directed to deficiencies of the prior art, a kind of pump flow stabilizing valve is provided, it is in oil pump
When fuel delivery and hydraulic system load variations, output flow kept stable may make, meet host stabilized (steady-state) speed and steering
The requirement of stability, it is ensured that the normal work of host.
In order to achieve the above objectives, a kind of pump flow stabilizing valve of the invention, including valve body, the oil inlet in valve body and return
Hydraulic fluid port, it is characterised in that the current stabilization spring cavity and output circuit being connected with oil inlet are additionally provided in valve body, in current stabilization spring cavity
Sliding is equipped with steady flow valve core, and steady flow valve core is equipped with piston section, which is set between the oil return opening and oil inlet；Steady
It is associated with flow stabilizing valve seat on the valve body at flow valve core rear, resetting spring is equipped between steady flow valve core and current stabilization valve seat；Output circuit
In be equipped with restriction, the output circuit at restriction rear is connected with the current stabilization spring cavity at steady flow valve core rear by connecting hole, surely
Blind hole is set in flow valve core back segment, is equipped with pressure limiting valve in blind hole, blind hole leading portion is connected by radial hole with oil return opening.
In use, as oil pump feed amount and hydraulic system load change, cause in the output circuit of restriction both sides
The position of pressure change, steady flow valve core is moved, and forms pressure balance in new position, while passing through piston section regulating flow-stabilizing
The aperture of the traitorous head piece formed between spool and oil return opening so that the pressure in the output circuit of restriction both sides has to be kept again
It is basically unchanged, may make output flow kept stable, meet the requirement of host stabilized (steady-state) speed and steering stability, it is ensured that is main
The normal work of machine；
As a further improvement on the present invention, the pressure limiting valve include the valve seat being coupled in the blind hole of steady flow valve core rear end, according to
Secondary spool and valve rod in front of valve seat, valve seat are equipped with axially extending bore, and one end of spool is placed in through-hole, the other end and valve rod
Contact is equipped with axial compressed spring between valve rod and steady flow valve core；The radial hole is located in front of valve seat；Structure letter
It is single, reliable；
As a further improvement on the present invention, that is slided on valve body is equipped with flow control rod, one end of flow control rod
Equipped with the conical surface and in the restriction, the other end being located at outside valve body is equipped with adjusting nut；The changeable section of flow control rod
The circulation area of head piece, to adjust the stationary flow magnitude of outflow output circuit；
As a further improvement on the present invention, it is associated with plug screw in the connecting hole, throttle orifice is set in plug screw；Throttle orifice can be gradually
Into the pressure change for adjusting restriction both sides, host generation shake is avoided, and process, install and replace conveniently；
As a further improvement on the present invention, the current stabilization valve seat is coupled to by screw thread on valve body；Adjustable steady flow valve core
Opening pressure；
As a further improvement on the present invention, the valve seat is coupled to by screw thread in the blind hole of steady flow valve core rear end；It is adjustable
The Opening pressure of pressure limiting valve；
In conclusion the present invention may make output flow to protect substantially in oil pump feed amount and hydraulic system load variations
It is fixed to keep steady, and meets the requirement of host stabilized (steady-state) speed and steering stability, it is ensured that the normal work of host.
Description of the drawings
Fig. 1 is the front view of the embodiment of the present invention.
Fig. 2 is the front view of one working condition of the embodiment of the present invention.
Fig. 3 is the hydraulic schematic diagram of the embodiment of the present invention.
Specific implementation mode
The invention will now be described in further detail with reference to the accompanying drawings.
As shown in Figure 1 to Figure 3, a kind of pump flow stabilizing valve of the embodiment, including valve body 1, the oil inlet in valve body 1
2（P）With oil return opening 3 (T), the current stabilization spring cavity 4 being connected with oil inlet 2 and output circuit 5, current stabilization bullet are additionally provided in valve body 1
That slides in spring chamber 4 is equipped with steady flow valve core 6, and steady flow valve core 6 is equipped with piston section 6a, piston section 6a be set to the oil return opening 2 with
Between oil inlet 3；Current stabilization valve seat 7 is associated with by screw thread on the valve body 1 at 6 rear of steady flow valve core, in steady flow valve core and 6 flow stabilizing valves
Resetting spring 8 is equipped between seat 7, three forms relief valve 20；Restriction 9 is equipped in output circuit 5（S）, slided on valve body 1
Be equipped with flow control rod 10, flow control rod 10 is equipped with sealing ring 11, and one end of flow control rod 10 is equipped with the conical surface and position
It is equipped with adjusting nut 12 in the other end in the restriction 9, being located at outside valve body 1；The output circuit 5 at 9 rear of restriction with it is steady
The current stabilization spring cavity 4 at 6 rear of flow valve core is connected by connecting hole 13, and plug screw 14 is associated in the connecting hole 13, is set in plug screw 14
Throttle orifice 15；Blind hole 16 is set in 6 back segment of steady flow valve core, pressure limiting valve 21 is equipped in blind hole 16, and pressure limiting valve 21 includes being joined by screw thread
Valve seat 17 in 6 rear end blind hole of steady flow valve core, the spool 18 and valve rod 19 for being sequentially arranged in 17 front of valve seat, valve seat 17 are equipped with axis
To through-hole, one end of spool 18 is placed in through-hole, and the other end is contacted with valve rod 19, is equipped between valve rod 19 and steady flow valve core 6
Axial compressed spring 22,16 leading portion of blind hole are connected by the radial hole 23 positioned at 17 front of valve seat with oil return opening 3.
When work, oil inlet 2 is connected to pump pressure delivery outlet, and oil return opening 3 is connected to pump oil inlet, output circuit 5 and liquid
Press steering connection：
1）When oil pump is with certain flow fuel feeding, pressure oil is passed through from oil inlet 2, and most of pressure oil passes through adjustable
Restriction 9 is exported by output circuit 5, and supply hydraulic steering system uses, which is known as stablizing oil circuit；Another part
Pressure oil pushes steady flow valve core 6 to move to right, defeated by oil return opening 3 by the traitorous head piece b formed between steady flow valve core 6 and oil return opening 3
Go out back pump oil inlet；In the case of hydraulic steering system hypertonia, i.e., hypertonia at end Z mouthfuls of output circuit 5 is more than
When the pressure of relief valve 20, steady flow valve core 6 is open, and oil return opening 3 is connected to current stabilization spring cavity 4, opens off-load, off-load oil is by returning
Hydraulic fluid port 3 (T) flows back to pump oil inlet；
2）If oil pump feed amount increases, 5 end of output circuit is arrived by adjustable restriction 9（That is Z mouthfuls）Flow gesture
Necessity increases, pressure difference before and after restriction 9（Pf-Pz）Also accordingly to increase, destroy the original equilibrium state of steady flow valve core 6, current stabilization
Spool 6 will move right；The result moved to right makes the aperture b of the traitorous head piece formed between steady flow valve core 6 and oil return opening 3 become larger,
The pressure Pf of 6 front cavity F of steady flow valve core is reduced, pressure difference is basically unchanged before and after maintaining restriction 9 again in this way, thus makes to lead to
The flow and flow Qz when former operating mode for crossing restriction 9 also change less, and steady flow valve core 6 is then in new position balance；, whereas if
In a certain operating mode, oil pump feed amount is reduced, and certainly will also be reduced by 9 flow of restriction, pressure difference before and after restriction 9（Pf-Pz）
Also accordingly to reduce, destroy original equilibrium state, steady flow valve core 6 is moved to the left under the effect of resetting spring 8, the result moved to left
So that the aperture b of traitorous head piece is become smaller, improve the pressure Pf of 6 front cavity F of steady flow valve core, before maintaining restriction 9 again in this way
Pressure difference is basically unchanged afterwards, thus is also changed less by the flow of restriction 9 and flow Qz when former operating mode；Steady flow valve core 6 is then
In another-new position balance；
3）If oil pump feed amount is constant, and when the increase of 5 terminal pressure of output circuit, steady flow valve core 6 will be moved to the left, and be reduced
The aperture b of traitorous head piece, increases the pressure Pf of 6 front cavity F of steady flow valve core, and pressure difference is basically unchanged before and after keeping restriction 9,
Make restriction 9 by flow and flow Qz variations when former operating mode it is little；Conversely, 5 terminal pressure of output circuit reduces, current stabilization
Spool 6 will move right, and increase the aperture b of traitorous head piece, reduce the pressure Pf of 6 front cavity F of steady flow valve core, keep section
Pressure difference is basically unchanged before and after head piece 9, make restriction 9 by flow and flow Qz variations when former operating mode it is little；Therefore no matter
In the case which kind of, as long as 9 area of restriction does not change, 9 flow Qz constant currents of restriction can be kept substantially；By it is above-mentioned can
Know：In the case of different different Z mouthfuls of the load pressures of fuel delivery, although position of the steady flow valve core 6 in valve body 1 is different,
But substantially constant can but be kept by Z mouthfuls of flow, meet the requirement of host stabilized (steady-state) speed and steering stability, it is ensured that host
Normal work.
The maximum working pressure of 5 end Z mouthfuls of output circuit is adjusted by adjusting the position of current stabilization valve seat 7 in the present invention；It is logical
10 position of flow control rod is overregulated, 9 flow area of restriction can be changed, different Z mouthfuls of regime flow Qz values can be obtained；Plug screw
Throttle orifice 15 in 14 can the progressive pressure change for adjusting 9 both sides of restriction, avoid host from generating shake；Connecting hole 13 can also be set
It is calculated as the throttle orifice of gradual change, improves stationarity when adjusting.
Claims (6)
1. a kind of pump flow stabilizing valve, including valve body, oil inlet and oil return opening in valve body, it is characterised in that also set in valve body
There are the current stabilization spring cavity and output circuit being connected with oil inlet, that is slided in current stabilization spring cavity is equipped with steady flow valve core, flow stabilizing valve
Core is equipped with piston section, which is set between the oil return opening and oil inlet；It is associated on the valve body at steady flow valve core rear steady
Valve seat is flowed, resetting spring is equipped between steady flow valve core and current stabilization valve seat；Restriction is equipped in output circuit, restriction rear
Output circuit is connected with the current stabilization spring cavity at steady flow valve core rear by connecting hole, sets blind hole in steady flow valve core back segment, in blind hole
Equipped with pressure limiting valve, blind hole leading portion is connected by radial hole with oil return opening.
2. a kind of pump flow stabilizing valve as described in claim 1, it is characterised in that the pressure limiting valve includes after being coupled to steady flow valve core
Valve seat, the spool and valve rod that are sequentially arranged in front of valve seat in the blind hole of end, valve seat are equipped with axially extending bore, and one end of spool is placed in logical
In hole, the other end and valve stem contacts are equipped with axial compressed spring between valve rod and steady flow valve core；The radial hole is located at valve
Seat front.
3. a kind of pump flow stabilizing valve as claimed in claim 1 or 2, it is characterised in that is slided on valve body is equipped with flow-rate adjustment
One end of bar, flow control rod is equipped with the conical surface and in the restriction, and the other end being located at outside valve body is equipped with adjusting nut.
4. a kind of pump flow stabilizing valve as claimed in claim 3, it is characterised in that be associated with plug screw in the connecting hole, set in plug screw
Throttle orifice.
5. a kind of pump flow stabilizing valve as claimed in claim 4, it is characterised in that the current stabilization valve seat is coupled to valve body by screw thread
On.
6. a kind of pump flow stabilizing valve as claimed in claim 2, it is characterised in that the valve seat is coupled to steady flow valve core by screw thread
In the blind hole of rear end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710229322.7A CN106949110B (en) | 2017-04-10 | 2017-04-10 | A kind of pump flow stabilizing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710229322.7A CN106949110B (en) | 2017-04-10 | 2017-04-10 | A kind of pump flow stabilizing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106949110A CN106949110A (en) | 2017-07-14 |
| CN106949110B true CN106949110B (en) | 2018-10-19 |
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ID=59474689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710229322.7A Active CN106949110B (en) | 2017-04-10 | 2017-04-10 | A kind of pump flow stabilizing valve |
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| Country | Link |
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| CN (1) | CN106949110B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206801981U (en) * | 2017-04-10 | 2017-12-26 | 四川长江液压件有限责任公司 | A kind of pump flow stabilizing valve |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4446144A1 (en) * | 1994-12-23 | 1996-06-27 | Bosch Gmbh Robert | Hydraulic control in monoblock design from at least two interlinked electromagnetically actuated proportional directional control valve elements |
| EP1528264A1 (en) * | 2003-10-30 | 2005-05-04 | OIL CONTROL S.p.A. | Valve with an accumulator for damping the fluctuation of the pilot pressure |
| CN2748677Y (en) * | 2003-12-30 | 2005-12-28 | 贺勍 | Balance valve |
| CN100441885C (en) * | 2006-10-10 | 2008-12-10 | 太原理工大学 | Hydraulic balance valve that automatically adapts to load changes |
| DE102007054135A1 (en) * | 2007-11-14 | 2009-05-20 | Hydac Filtertechnik Gmbh | Hydraulic valve device |
| CN101949397A (en) * | 2010-10-20 | 2011-01-19 | 竺浩君 | Balanced valve bank of derricking cylinder system |
| CN103062147B (en) * | 2013-01-24 | 2015-06-03 | 中联重科股份有限公司 | Hydraulic control throttle valve, balance valve, hydraulic system for controlling hoist and construction machinery |
| CN103089736A (en) * | 2013-01-31 | 2013-05-08 | 杨洁 | Balance valve and differential pressure protection controlling method of two-level protection overflow valve thereof |
| CN103343829B (en) * | 2013-07-24 | 2015-06-03 | 南京工业大学 | Balance valve and test system thereof |
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2017
- 2017-04-10 CN CN201710229322.7A patent/CN106949110B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206801981U (en) * | 2017-04-10 | 2017-12-26 | 四川长江液压件有限责任公司 | A kind of pump flow stabilizing valve |
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| CN106949110A (en) | 2017-07-14 |
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