CN106194876A - A kind of self-cleaning type constant flow control valve - Google Patents
A kind of self-cleaning type constant flow control valve Download PDFInfo
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- CN106194876A CN106194876A CN201610796707.7A CN201610796707A CN106194876A CN 106194876 A CN106194876 A CN 106194876A CN 201610796707 A CN201610796707 A CN 201610796707A CN 106194876 A CN106194876 A CN 106194876A
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- constant flow
- spring
- control valve
- antivibrator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Analytical Chemistry (AREA)
- Details Of Valves (AREA)
Abstract
A kind of self-cleaning type constant flow control valve, structure uses the configuration mode of " high pressure filter+two-stage guiding valve+low-pressure filter "；Constant flow control valve uses the two-stage spool valve configuration mode of " pilot valve+main valve ", and regulates control performance by some damping holes；Entrance at constant flow control valve configures high pressure filter, filters the engine high pressure kerosene of drain, prevents impurity therein from entering constant flow control valve；Outlet at constant flow control valve configures low-pressure filter, and the low pressure kerosene that outflow constant flow control valve flows back to electromotor filters, and prevents the impurity produced in constant flow control valve from polluting electromotor.The present invention has automatic cleaning action and constant flow rate controls two features, it is adaptable to the load for needing constant flow rate to export provides the application scenario cleaning reliable fluid.
Description
Technical field
The present invention relates to a kind of self-cleaning type constant flow control valve, belong to flow control valve technical field.
Background technology
The flow speed control valve that the many employings of existing constant flow control valve are made up of choke valve and uniform-pressure-drop valve, its constant flux control belongs to
In opened loop control, there is inherent variability in its flow-control；Flow speed control valve belongs to single-stage constant speed valve, and its flow is typically small；Flow speed control valve
Product not integrated high-and-low-voltage filter, does not therefore have self-cleaning function.
Summary of the invention
The technology of the present invention solves problem: overcome the deficiencies in the prior art, it is provided that a kind of self-cleaning type constant flow control
Valve processed, it is achieved that the constant flux control function under big flow, that flow closed loop indifference controls, there is self-cleaning function.
The technical solution of the present invention is:
A kind of self-cleaning type constant flow control valve, including: low-pressure filter, logical oil jacket, high pressure filter, high pressure filter
Housing and constant flux control valve body；Equipped with high pressure filter housing, high-pressure filteration at the oil-in of constant flux control valve body
Device is arranged on high pressure filter enclosure interior, for cleaning the fluid of input；
It is attached by logical oil jacket between oil-out and the low-pressure filter of constant flux control valve body and seals, low pressure
Filter is for cleaning the fluid of output；Constant flux control valve body is for carrying out constant flux control to flowing through fluid therein.
The oil-in of high pressure filter with the oil-out of low-pressure filter towards consistent.
Constant flux control valve body includes pilot valve, main valve, valve chest, the first antivibrator, the second antivibrator, the 3rd damping
Device, the first sealing structure and second seal structure；
Pilot valve, main valve and the first antivibrator are installed in valve chest, and the first damper, between pilot valve and main valve, is used
Overshoot in regulation main valve flow；Second antivibrator and the 3rd antivibrator are installed in series in valve chest, provide anti-for pilot valve
Feed voltage power, is provided with low pressure chamber and high pressure chest in valve chest, the interface loaded with it as constant flux control valve body, the most real
Now flowed to load by constant flow valve and flowed back to the connection of constant flow valve by load；First seals structure realizes the first antivibrator oil circuit
To external seal, second seal structure realize the 3rd antivibrator to external seal.
Described pilot valve includes the first screw plug, limited block, guide valve bushing, guide valve core, cushion cover, swivel nut, thimble, footstock, the first bullet
Spring, the first spring base, Adjusting bolt Adjusting screw and locking nut；
Guide valve bushing is positioned at valve chest, and the first screw plug is arranged on one end of guide valve bushing, and cushion cover is arranged on another of guide valve bushing
End, swivel nut is arranged on the outside of cushion cover, is fixed on valve chest by guide valve bushing by tightening the first screw plug and swivel nut；Guide valve core is pacified
Being contained in guide valve bushing, it installs limited block near one end of the first screw plug, and for carrying out spacing to guide valve core, its other end passes through
Cushion cover realizes spacing；
At guide valve core, thimble, footstock, the first spring, the first spring base and Adjusting bolt Adjusting screw are installed near one end of cushion cover,
Thimble, footstock and the first spring base coordinate, for the spring force of the first spring is passed to guide valve core；Adjusting bolt Adjusting screw and swivel nut
Between be threaded, by adjust Adjusting bolt Adjusting screw, change the pre compressed magnitude of the first spring, correspondingly change work set in advance
The size of the spring force being used on guide valve core, thus adjust the setting value of constant flow control valve target flow.
Described main valve include the first spiral shell seat, the second spring base, the second spring, main valve housing, main valve plug, the 3rd spring, the 3rd
Spring base and the second spiral shell seat；
Main valve housing is positioned at valve chest, and the first spiral shell seat is installed in main valve housing one end, and the other end installs the second spiral shell seat, the first spiral shell seat
With the second spiral shell seat, main valve housing is fixed on valve chest；Main valve plug is arranged in main valve housing, and main valve plug is near the one of the first spiral shell seat
End arranges the second spring and the second spring base, and the other end of main valve plug arranges the 3rd spring and the 3rd spring base, the second spring base
Being separately mounted in the first spiral shell seat and the second spiral shell seat with the 3rd spring base, the second spring and the 3rd spring are for realizing main valve plug
Resetting, the 3rd spring base, for spacing for main valve plug, limits the minimum aperture of main valve.
The rigidity of the second spring and the 3rd spring is identical.
First spiral shell seat of main valve and the first screw plug of pilot valve are towards identical.
Two delivery outlets of pilot valve are connected respectively to the both sides of main valve plug by the runner on valve chest, it is achieved pilot valve is to master
The control of valve, from pilot valve delivery outlet to the connection oil circuit of main valve plug both sides, is parallel with the first antivibrator.
Between low pressure chamber and the low-pressure filter of load oil return, valve chest arranges a fixed orifice, by low
Pressure chamber is connected to the outside of the 3rd antivibrator by runner, and the inner side of the second antivibrator is connected to low-pressure filter by runner
Oil-in；Between the second antivibrator and the 3rd antivibrator, arrange a runner, be connected to close first screw plug of guide valve core
Side.
The present invention compared with prior art provides the benefit that:
1) technical solution of the present invention is integrated with high pressure filter in constant flow control valve import, effectively prevents in the fluid of upstream
Impurity enter constant flow control valve.
2) technical solution of the present invention is integrated with low-pressure filter at constant flux control valve outlet port, effectively prevent constant flow valve and
The impurity produced in its load enters downstream with fluid.
3) high pressure filter is embedded inside valve chest by technical solution of the present invention, high-low pressure filter and constant flow valve height
Integrated, it is thus achieved that highly integrated self-cleaning function.
4) technical solution of the present invention utilizes two-stage guiding valve to realize constant flux control, is adapted to the demand of big flow-control.
5) technical solution of the present invention utilizes fixed orifice that controlled flow is converted to pressure, and is incited somebody to action by series damped device
Pressure feedback, to pilot valve, participates in closed loop control, it is possible to achieve higher flow control accuracy.
6) dynamic pressure damper is connected in parallel between main valve plug both sides by technical solution of the present invention, adjusts the damping of dynamic pressure damper
Hole size can adjust the overshoot of flow.
Accompanying drawing explanation
Fig. 1 is the schematic appearance of self-cleaning type constant flow control valve of the present invention；
Fig. 2 is the structural representation of self-cleaning type constant flow control valve of the present invention；
Fig. 3 is the control structure schematic diagram of self-cleaning type constant flow control valve of the present invention；
Fig. 4 is the feedback arrangement schematic diagram of self-cleaning type constant flow control valve of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is further described in detail.
A new generation's carrier rocket servo control mechanism uses high pressure kerosene constant speed hydraulic motor to include perseverance as dynamical element, hydraulic motor
Flow control valve and fixed displacement hydraulic motor two parts, be drained to hydraulic motor by high pressure kerosene by electromotor and carry out work done, drives
Hydraulic motor drives servo control mechanism work, and the low pressure kerosene after work done flows back to electromotor by low pressure line.Hydraulic motor belongs to be watched
The key element of dress system, the most sensitive to the granularity of fluid, it is normal that impurity in drain kerosene likely affects hydraulic motor
Work；Hydraulic motor originally also can produce impurity in operation process simultaneously, and these impurity can flow back to electromotor along with fluid, and having can
Electromotor can be polluted as fifth wheel.A feature of the present invention is just a cancellation these hidden danger.
Self-cleaning type constant flow control valve involved in the present invention, is mainly used in carrier rocket hydraulic servo system of a new generation
System, provides the high-voltage oil liquid of predetermined amount of flow for fixed displacement hydraulic motor, coordinates the constant speed control realizing hydraulic motor.In structure
Use the configuration mode of " high pressure filter+two-stage guiding valve+low-pressure filter ".Entrance at constant flow valve is integrated with a high pressure
Filter, filters the engine high pressure kerosene of drain, prevents impurity therein from entering constant flow control valve；At constant flow
The outlet of control valve is integrated with a low-pressure filter, and the low pressure kerosene that outflow constant flow control valve flows back to electromotor was carried out
Filter, prevents the impurity produced in constant flow control valve from polluting electromotor.
Self-cleaning type constant flow control valve involved in the present invention, is integrated with high-low pressure on the basis of two-stage constant flow valve
Filter.While realizing the output control of constant big flow, serve the effect of isolation impurity, possessed self-cleaning energy
Power.
As it is shown in figure 1, the invention provides a kind of self-cleaning type constant flow control valve, including: low-pressure filter 2, logical oil
Set 4, high pressure filter 5, high pressure filter housing 6 and constant flux control valve body 38；The oil-feed of constant flux control valve body 38
Equipped with high pressure filter housing 6 at Kou, it is internal that high pressure filter 5 is arranged on high pressure filter housing 6, for cleaning the oil of input
Liquid, improves the oil resistant liquid pollution capacity of system；
It is attached by logical oil jacket 4 and seals between oil-out and the low-pressure filter 2 of constant flux control valve body 38,
Low-pressure filter 2, for cleaning the fluid of output, reduces and system downstream is produced the risk polluted；Constant flux control valve body 38
For carrying out constant flux control to flowing through fluid therein.The oil-in of high pressure filter 5 and the oil-out court of low-pressure filter 2
To unanimously, it is simple to system upstream and downstream pipeline is arranged in the confined space, save space.
Constant flux control valve body 38 include pilot valve, main valve, valve chest the 1, first antivibrator the 21, second antivibrator 32,
Three antivibrators 33, first seal structure 22 and second and seal structure 34；
Pilot valve, main valve and the first antivibrator 21 are installed in valve chest 1, the first antivibrator 21 be positioned at pilot valve and main valve it
Between, for regulating the overshoot of main valve flow, increase the damping hole diameter of the first antivibrator within the specific limits, master can be reduced
The overshoot of valve flow, the rapidity simultaneously responded also can reduce, the first antivibrator be set to regulate constant flux control performance
Provide convenience condition；Second antivibrator 32 and the 3rd antivibrator 33 are installed in series in valve chest 1, provide feedback pressure for pilot valve
Power, is provided with low pressure chamber 7 and high pressure chest 8, the interface loaded as constant flux control valve body 38, difference with it in valve chest 1
Realize being flowed to load by constant flow valve and being flowed back to the connection of constant flow valve by load；First seals structure 22 realizes the first antivibrator
21 oil circuits to external seal, second seal structure 34 realize the 3rd antivibrator 33 to external seal.
Described pilot valve includes the first screw plug 9, limited block 10, guide valve bushing 11, guide valve core 12, cushion cover 13, swivel nut 14, thimble
15, footstock the 16, first spring the 17, first spring base 18, Adjusting bolt Adjusting screw 19 and locking nut 20；
Guide valve bushing 11 is positioned at valve chest 1, and the first screw plug 9 is arranged on one end of guide valve bushing 11, and cushion cover 13 is arranged on pilot valve
The other end of set 11, swivel nut 14 is arranged on the outside of cushion cover 13, is fixed by guide valve bushing 11 by tightening the first screw plug 9 and swivel nut 14
On valve chest 1；Guide valve core 12 is arranged in guide valve bushing 11, and it installs limited block 10 near one end of the first screw plug 9, for right
Guide valve core 12 carries out spacing, and its other end realizes spacing by cushion cover 13；
At guide valve core 12, thimble 15, footstock the 16, first spring the 17, first spring base 18 are installed near one end of cushion cover 13
With Adjusting bolt Adjusting screw 19, thimble 15, footstock 16 and the first spring base 18 coordinate, for being passed to by the spring force of the first spring 17
Guide valve core 12；It is to threaded between Adjusting bolt Adjusting screw 19 with swivel nut 14, by adjusting Adjusting bolt Adjusting screw 19, changes the first spring 17
Pre compressed magnitude, correspondingly changes the size of the spring force acted on guide valve core 12 set in advance, thus adjusts constant flow control
The setting value of valve target flow processed.
Described main valve includes first spiral shell seat the 24, second spring base the 25, second spring 26, main valve housing 27, main valve plug the 28, the 3rd
Spring the 29, the 3rd spring base 30 and the second spiral shell seat 31；
Main valve housing 27 is positioned at valve chest 1, and the first spiral shell seat 24 is installed in main valve housing 27 one end, and the other end installs the second spiral shell seat
31, main valve housing 27 is fixed on valve chest 1 by the first spiral shell seat 24 and the second spiral shell seat 31；Main valve plug 28 is arranged in main valve housing 27,
Main valve plug 28 arranges the second spring 26 and the second spring base 25 near one end of the first spiral shell seat 24, and the other end of main valve plug 28 is arranged
3rd spring 29 and the 3rd spring base 30, the second spring base 25 and the 3rd spring base 30 are separately mounted to the first spiral shell seat 24 and second
In spiral shell seat 31, the second spring 26 and the 3rd spring 29 are for realizing the reset of main valve plug 28, and the 3rd spring base 30 is main valve plug 28
Carry out spacing, limit the minimum aperture of main valve.
Second spring 26 is identical with the rigidity of the 3rd spring 29, and the two spring jointly acts on and makes main valve plug 28 reset.
First spiral shell seat 24 of main valve and the first screw plug 9 of pilot valve are towards identical.
Two delivery outlets of pilot valve are connected respectively to the both sides of main valve plug 28 by the runner on valve chest 1, it is achieved pilot valve
Control to main valve, from pilot valve delivery outlet to main valve plug on the connection oil circuit of 28 both sides, is parallel with the first antivibrator 21, necessarily
In the range of increase the damping hole diameter of the first antivibrator 21, the overshoot of main valve flow can be reduced, the rapidity simultaneously responded
Also can reduce, being set to of the first antivibrator 21 regulates constant flux control performance and provides convenience condition.
The delivery outlet of pilot valve is connected to the chamber, left and right two of valve core of main valve 28 by the runner on valve chest 1, it is achieved pilot valve pair
The control of main valve.On valve chest 1, from pilot valve delivery outlet to main valve plug on the connection oil circuit in about 28 two chambeies, a resistance in parallel
Buddhist nun's device 21, the right-hand member at antivibrator 21 is arranged the first sealing structure 22, is fixed in valve chest 1 by antivibrator 21.Pilot valve defeated
Going out fluid for control bound, it is achieved the control to flow system flow, antivibrator 21 is connected in parallel on the both sides of valve core of main valve 28, is used for changing
The control performance of philanthropist's valve core, reduces the overshoot of main valve plug motion.
The composition of feedback control loop is as shown in Figure 4.Antivibrator 32 and 33 is disposed in series in valve chest 1, by second
Seal structure 34 to be fixed on valve chest 1；Between low pressure chamber 7 and the low-pressure filter 2 of load (hydraulic motor) oil return, arrange
One fixed orifice 37；Low pressure chamber 7 is connected to by runner the right side of antivibrator 33, antivibrator 32 pass on left runner
36 entrances being connected to low-pressure filter 2；Between antivibrator 32 and 33, arrange a runner, be connected to the right side of guide valve core 12
Side.The flow of low pressure oil return is converted to pressure signal by fixed orifice 37, and by with fixed orifice 37 be in parallel two
Individual series connection dividing potential drop antivibrator 32 and 33, and using the pressure in the middle of antivibrator 32 and 33 as feedback signal, be connected to by oil circuit
The right side of guide valve core 12, compared with the spring force that spring on the left of guide valve core 12 17 is preset, forms flow negative feedback, it is achieved constant
Flow-control.
Embodiment:
High pressure filter filtering accuracy 40 μm, high to the oil filtrating precision flowing to constant flow control valve, effectively protect perseverance
Flow control valve and load thereof avoid the harmful effect that oil contamination produces；
Low-pressure filter filtering accuracy 90 μm, filters again to the fluid flowing out constant flow control valve, filtering accuracy
Higher, it is to avoid downstream is polluted by the granule foreign that constant flow control valve and load thereof produce.
Guide valve core 12 is carried out spacing by limited block 10 and cushion cover 13, makes the 0.5mm scope near guide valve core 12 position wherein
Interior motion, reduces the backlash of guide valve core 12, it is ensured that the response speed of pilot valve.
The a length of 20.5mm of the 3rd spring base 30, under its position-limiting action, the minimum aperture of main valve is 1.5mm, the 3rd
The position-limiting action of spring base 30, on the one hand prevents the too small flow that affects of main valve aperture in dynamic process, on the other hand prevents because of master
Valve core crosses the oscillation of flows that punching causes.
The aperture of the first antivibrator 21 is 0.8mm, obtains the less flow hyperharmonic acceptable corresponding time.
Second antivibrator 32 and the 3rd antivibrator 33 damping hole diameter take 0.3mm and 0.8mm respectively, can be by feedback pressure
Stably export and control pilot valve.
Self-cleaning type constant flow control valve range of application of the present invention is including, but not limited to the fixed speed control of hydraulic motor, also
Can be with expansive approach in any occasion needing to possess the constant flow output of automatically cleaning ability.
The content not being described in detail in description of the invention belongs to techniques known.
Claims (9)
1. a self-cleaning type constant flow control valve, it is characterised in that including: low-pressure filter (2), logical oil jacket (4), height press through
Filter (5), high pressure filter housing (6) and constant flux control valve body (38)；The oil-in of constant flux control valve body (38)
Place is equipped with high pressure filter housing (6), and it is internal that high pressure filter (5) is arranged on high pressure filter housing (6), is used for cleaning input
Fluid；
It is attached with close by logical oil jacket (4) between oil-out and the low-pressure filter (2) of constant flux control valve body (38)
Envelope, low-pressure filter (2) is for cleaning the fluid of output；Constant flux control valve body (38) is for entering flowing through fluid therein
Row constant flux control.
A kind of self-cleaning type constant flow control valve the most according to claim 1, it is characterised in that: high pressure filter (5)
The oil-out of oil-in and low-pressure filter (2) is towards consistent.
A kind of self-cleaning type constant flow control valve the most according to claim 1, it is characterised in that: constant flux control valve body
(38) include pilot valve, main valve, valve chest (1), the first antivibrator (21), the second antivibrator (32), the 3rd antivibrator (33), first
Seal structure (22) and second and seal structure (34)；
Pilot valve, main valve and the first antivibrator (21) are installed in valve chest (1), and the first antivibrator (21) is positioned at pilot valve and main valve
Between, for regulating the overshoot of main valve flow；Second antivibrator (32) and the 3rd antivibrator (33) are installed in series at valve chest
(1), in, provide feedback pressure for pilot valve, be provided with low pressure chamber (7) and high pressure chest (8) in valve chest (1), as constant flux control
The interface that valve body (38) loads with it, realizes being flowed to load by constant flow valve and being flowed back to the company of constant flow valve by load respectively
Connect；First seal structure (22) realize the first antivibrator (21) oil circuit to external seal, second seal structure (34) realizes the 3rd
Antivibrator (33) to external seal.
A kind of self-cleaning type constant flow control valve the most according to claim 3, it is characterised in that: described pilot valve includes first
Screw plug (9), limited block (10), guide valve bushing (11), guide valve core (12), cushion cover (13), swivel nut (14), thimble (15), footstock (16),
First spring (17), the first spring base (18), Adjusting bolt Adjusting screw (19) and locking nut (20)；
Guide valve bushing (11) is positioned at valve chest (1), and the first screw plug (9) is arranged on one end of guide valve bushing (11), and cushion cover (13) is installed
At the other end of guide valve bushing (11), swivel nut (14) is arranged on the outside of cushion cover (13), by tightening the first screw plug (9) and swivel nut
(14) guide valve bushing (11) is fixed on valve chest (1)；Guide valve core (12) is arranged in guide valve bushing (11), and it is near the first screw plug
(9) limited block (10) is installed in one end, and for carrying out spacing to guide valve core (12), its other end realizes limit by cushion cover (13)
Position；
Near one end of cushion cover (13), thimble (15), footstock (16), the first spring (17), the first bullet are installed at guide valve core (12)
Spring abutment (18) and Adjusting bolt Adjusting screw (19), thimble (15), footstock (16) and the first spring base (18) coordinate, for by the first spring
(17) spring force passes to guide valve core (12)；It is to threaded between Adjusting bolt Adjusting screw (19) with swivel nut (14), is adjusted by adjustment
Joint swivel nut (19), changes the pre compressed magnitude of the first spring (17), correspondingly changes set in advance acting on guide valve core (12)
The size of spring force, thus adjust the setting value of constant flow control valve target flow.
A kind of self-cleaning type constant flow control valve the most according to claim 3, it is characterised in that: described main valve includes first
Spiral shell seat (24), the second spring base (25), the second spring (26), main valve housing (27), main valve plug (28), the 3rd spring (29), the 3rd
Spring base (30) and the second spiral shell seat (31)；
Main valve housing (27) is positioned at valve chest (1), and the first spiral shell seat (24) is installed in main valve housing (27) one end, and the other end installs the second spiral shell
Seat (31), main valve housing (27) is fixed on valve chest (1) by the first spiral shell seat (24) and the second spiral shell seat (31)；Main valve plug (28) is installed
In main valve housing (27), main valve plug (28) arranges the second spring (26) and the second spring base near one end of the first spiral shell seat (24)
(25), the other end of main valve plug (28) arranges the 3rd spring (29) and the 3rd spring base (30), the second spring base (25) and the 3rd
Spring base (30) is separately mounted in the first spiral shell seat (24) and the second spiral shell seat (31), and the second spring (26) and the 3rd spring (29) are used
In realizing the reset of main valve plug (28), the 3rd spring base (30), for spacing for main valve plug (28), limits the minimum aperture of main valve.
A kind of self-cleaning type constant flow control valve the most according to claim 5, it is characterised in that: the second spring (26) and the
The rigidity of three springs (29) is identical.
A kind of self-cleaning type constant flow control valve the most according to claim 3, it is characterised in that: the first spiral shell seat of main valve
(24) with first screw plug (9) of pilot valve towards identical.
A kind of self-cleaning type constant flow control valve the most according to claim 3, it is characterised in that: two delivery outlets of pilot valve
The both sides of main valve plug (28) it are connected respectively to, it is achieved the pilot valve control to main valve by the runner on valve chest (1), defeated from pilot valve
Export to, on the connection oil circuit of main valve plug (28) both sides, be parallel with the first antivibrator (21).
A kind of self-cleaning type constant flow control valve the most according to claim 3, it is characterised in that: in the low pressure of load oil return
Between chamber (7) and low-pressure filter (2), valve chest (1) arranges a fixed orifice (37), low pressure chamber (7) is passed through
Runner is connected to the outside of the 3rd antivibrator (33), and the inner side of the second antivibrator (32) is connected to low-pressure filter by runner
(2) oil-in；Between the second antivibrator (32) and the 3rd antivibrator (33), arrange a runner, be connected to guide valve core (12)
Near the side of the first screw plug (9).
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| CN201610796707.7A CN106194876B (en) | 2016-08-31 | 2016-08-31 | A kind of self-cleaning type constant flow control valve |
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| CN201610796707.7A CN106194876B (en) | 2016-08-31 | 2016-08-31 | A kind of self-cleaning type constant flow control valve |
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| CN106194876B CN106194876B (en) | 2018-04-10 |
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|---|---|---|---|---|
| JP2004176812A (en) * | 2002-11-27 | 2004-06-24 | Asahi Organic Chem Ind Co Ltd | Constant flow rate valve |
| CN2864266Y (en) * | 2005-11-02 | 2007-01-31 | 韦莉 | Constant flow control valve for high-pressure fluid |
| US20090301580A1 (en) * | 2008-06-09 | 2009-12-10 | Donald Hillhouse | Constant flow valve |
| CN201875233U (en) * | 2010-02-23 | 2011-06-22 | 北京天箭星节能技术有限公司 | Multifunctional constant flow adjusting valve |
| CN201972917U (en) * | 2011-03-21 | 2011-09-14 | 江苏恒源液压有限公司 | Constant pressure and constant flow control valve for axial piston pump |
| CN203757109U (en) * | 2014-01-14 | 2014-08-06 | 宁波杰克龙精工有限公司 | Constant flow control device of heat supply pipeline |
| CN105626613A (en) * | 2014-10-29 | 2016-06-01 | 北京精密机电控制设备研究所 | Single-stage constant-speed valve used for high-pressure kerosene constant-speed hydraulic motor |
| CN205090024U (en) * | 2015-11-06 | 2016-03-16 | 深圳市丰利源节能科技有限公司 | Take adjustable lock valve of filter screen constant current |
| CN205479403U (en) * | 2016-03-10 | 2016-08-17 | 天津首阀科技有限公司 | Throttle valve |
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|---|---|
| CN106194876B (en) | 2018-04-10 |
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