CN109723692A - Pressure-control valve - Google Patents
Pressure-control valve Download PDFInfo
- Publication number
- CN109723692A CN109723692A CN201811554553.6A CN201811554553A CN109723692A CN 109723692 A CN109723692 A CN 109723692A CN 201811554553 A CN201811554553 A CN 201811554553A CN 109723692 A CN109723692 A CN 109723692A
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- Prior art keywords
- pressure
- spring
- spool
- control valve
- oil
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- 230000033228 biological regulation Effects 0.000 claims abstract description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 description 8
- 239000002828 fuel tank Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The present invention relates to a kind of pressure-control valves, comprising: valve body is formed with oil inlet and oil return opening thereon；Spool is slideably positioned in valve body, and can separate or be connected oil inlet and oil return opening；Valve pocket is sealedly attached on valve body, and is formed with spring cavity in inside；Regulation component comprising the spring base and pressure spring being set in spring cavity, wherein one end of spring base is extend out in air through spring cavity and from spring cavity, and for pushing spool, spring cavity is connected to the return port the other end；Pressure spring is sheathed on spring base with compressive state and can be towards oil inlet push and press spring seat, in the hydraulic system with the pressure-control valve, since the oil inlet operating pressure of pressure-control valve is not influenced by oil return opening back pressure, therefore, the Median Function of the reversal valve of hydraulic system can according to the executive component in hydraulic system needs and carry out flexible choice, design of Hydraulic System difficulty reduce.
Description
Technical field
The present invention relates to the pressure control valves in hydraulic system, more particularly to a kind of pressure-control valve.
Background technique
It is essential similar to pressure-control valves such as overflow valve, pressure reducing valve, balanced valve and sequence valves in hydraulic system
Hydraulic Elements, its working principle is that act on the power on spool mutually flat for the power acted on spool by spring and pressure oil
Weighing apparatus, adjustment spring acts on the power on spool, so as to control oil pressure.The pressure-control valve disclosed in related art
In, fuel tank is individually generally taken back using oil return opening (spring cavity), to reduce influence of the oil return opening back pressure for controlled oil pressure.But
It is that when designing hydraulic system, two actuator ports are taken back into wanting for fuel tank when the Median Function of reversal valve in system is difficult to meet
It asks, the oil circuit of hydraulic system will be made to design the complex of change at this point, oil return opening takes back fuel tank.
In view of this, needing to propose a kind of new pressure-control valve.
Summary of the invention
Based on this, it is necessary to which the problem for taking back fuel tank difficulty for spring cavity provides a kind of pressure-control valve, the pressure control
Valve processed can decrease or even eliminate the back pressure of spring cavity more conveniently, make the operating pressure of pressure-control valve only with setting pressure
It is related.
A kind of pressure-control valve, the pressure-control valve include: valve body, are formed with oil inlet and oil return opening thereon；Spool,
It is slideably positioned in the valve body, and can separate or be connected the oil inlet and the oil return opening, is formed on the spool
There is one end to be connected to the first oil duct of the oil return opening；Valve pocket is sealedly attached on the valve body, and is formed with bullet in inside
Spring chamber；Regulation component comprising the spring base being slideably positioned in the spring cavity, and the tune being sheathed on the spring base
Pressing spring, wherein one end of the spring base is extend out in air through the spring cavity and from the spring cavity, and the other end is used
In pushing the spool, the second oil duct is formed on the spring base, second oil duct is connected to first oil duct and institute
State spring cavity；The pressure spring is sheathed on the spring base with compressive state and can be towards described in oil inlet pushing
Spring base.
The spring base includes the pedestal for pushing the spool in one of the embodiments, and along the valve
The mobile direction of core from the pedestal towards the spring cavity outside the body of rod that extends, the cross-sectional area of the body of rod is equal to described
The cross-sectional area of oil inlet.
The pedestal is towards being formed with bellmouth, the valve on the one side of the spool in one of the embodiments,
It is formed on core and can extend into the spherical surface contacted in the bellmouth and with the inner surface of the bellmouth.
In one of the embodiments, one end for contacting at the oil inlet of the spool be formed with contact at it is described into
The tapered surface of hydraulic fluid port.
The valve pocket is formed in one end that the body of rod stretches out in one of the embodiments, stretches out hole, the spring
It is intracavitary be additionally provided be socketed on the body of rod and seal the spring cavity be slidingly sealed plug.
It is described in one of the embodiments, to be slidingly sealed for being provided with and both being slidingly sealed between plug and the body of rod
One sealing element, and/or, it is described to be slidingly sealed second for being provided with and both being slidingly sealed between plug and the internal perisporium of the spring cavity
Sealing element, be additionally provided in the spring cavity side against it is described be slidingly sealed plug, the other side compresses the pad of the pressure spring
Piece.
It is also set up on the stretching hole in one of the embodiments, and is bolted with adjusting screw rod, the adjusting screw rod protrudes into
One end of the spring cavity is slidingly sealed beyond the Great Wall described in pressing on, and the appearance body of rod is additionally provided on the adjusting screw rod and is protruded into simultaneously
The stepped hole being connected in air.
It is bolted on the adjusting screw rod in one of the embodiments, outside the valve pocket and described for locking
The locking nut of adjusting screw rod position.
The valve pocket includes the first valve pocket being detachably connected on the valve body in one of the embodiments, and
The second valve pocket being detachably connected with first valve pocket.
First oil duct includes the transverse direction for being parallel to the oil return opening axis direction and extending in one of the embodiments,
Section and the longitudinal sections extended along the spool moving direction, second oil duct include and the longitudinal sections axially extending first
Duct, and connection first duct to the second duct of the spring cavity.
In above-mentioned pressure-control valve, since the spring cavity and one end stretching spring cavity are run through extremely in one end of spring base
In air, the active force that the oil pressure at least partly spring cavity acts on spool is counteracted, oil return opening has been reduced or even eliminated
Influence of the back pressure for the operating pressure of oil inlet.
Detailed description of the invention
Fig. 1 is the assembly structure figure of the pressure-control valve of one embodiment of the present invention；
Fig. 2 is that can show spring base and the installation diagram for being slidingly sealed plug and spool matching relationship.
Description of symbols
1, valve body；10, oil inlet；11, oil return opening；
2, spool；20, the first oil duct；200, traversing section；201, longitudinal sections；21, tapered surface；
3, valve pocket；30, spring cavity；31, the first valve pocket；32, the second valve pocket；320, hole is stretched out；
4, regulation component；40, spring base；400, pedestal；4000, bellmouth；401, the body of rod；402, the second oil duct；4020,
First duct；4021, the second duct；41, pressure spring；
5, it is slidingly sealed plug；
6, first seal；60, second seal；
7, adjusting screw rod；70, stepped hole；
8, locking nut；
9, gasket.
Specific embodiment
Refering to what is shown in Fig. 1, pressure-control valve according to an embodiment of the present invention, including valve body 1, be formed with thereon into
Hydraulic fluid port 10 and oil return opening 11, wherein the oil pressure P of oil inlet 101For the operating pressure of pressure-control valve, the oil pressure P of oil return opening 112
For return pressure.The inner cavity sliding of valve body 1 is provided with spool 2, and spool 2 can separate or be connected to oil inlet 10 and oil return opening 11.
Valve pocket 3 is connected on one end that the separate oil inlet 10 of valve body 1 is arranged, also, one end of valve pocket 3 and valve body 1 are tightly connected, separately
One end is sealed by other sealing means, to form spring cavity 30 in the inside of valve pocket 3.Pressure-control valve further includes regulation component
4 comprising the spring base 40 being slidably disposed in inside valve pocket 3, and the pressure spring 41 being sheathed on spring base 40,
In: one end of spring base 40 directly or indirectly compresses spool 2, and spring cavity is stretched out in the one end of the other end from valve pocket 3 far from spool 2
30, also, this one end of spring base 40 is directly or indirectly exposed in air so that on this one end end face of spring base 40 by
Pressure be atmospheric pressure.Pressure spring 41 compresses spring base 40 with compressive state, by adjusting the decrement of pressure spring 41,
The elasticity that i.e. adjustable regulation component 4 acts on spool 2 compresses power, in this way, oil pressure P of the one end of spool 2 by oil inlet 101
Motive force, the other end compressed power by above-mentioned elasticity, P when the two balances1Value, the as operating pressure of pressure-control valve.
The content in conjunction with shown in Fig. 1 and Fig. 2 is formed with the first oil duct 20, in one embodiment, first on spool 2
Oil duct 20 includes the traversing section 200 parallel with the axis direction of oil return opening 11, and along spool 2 glide direction extend and with cross
The longitudinal sections 201 that line segment 200 is connected to；The second oil duct 402 is formed on spring base 40 comprising coaxially arranged with longitudinal sections 201
The first duct 4020 and the first duct 4020 is connected to the second duct 4021 of spring cavity 30.First oil duct 20 and oil return
Mouth 11 is connected to, and the second oil duct 402 is connected to first oil duct 20 and spring cavity 30, this makes the oil pressure in spring cavity 30 also be oil return
The oil pressure of mouth 11, i.e. P2.It should be understood that the first oil duct 20, the second oil duct 402 in foregoing description may be set to be it
His form, which, which is also not limited in spool 2, is connected to spring cavity 30 with the inside of spring base 40 to oil return opening 11,
Spring cavity 30 can be connected to by oil return opening 11 using the form of other external oil ducts.
Spring base 40 includes the body of rod 401 for compressing the pedestal 400 of spool 2 and being set on pedestal 400, and the two can
To be to be integrally machined molding, it is also possible to molding assembly after separate machined.Wherein: the body of rod 401 prolongs along the moving direction of spool 2
It stretches, also, stretches out spring cavity 30 in one end of the separate spool 2 of valve pocket 3.At least partly duct of second oil duct 402 above-mentioned
It is formed on the body of rod 401.
The case where structure with reference to shown in Fig. 2, the area of section of the body of rod 401 are A3,2 stress of spool is analyzed as follows:
The oil pressure P of oil inlet 101Act on the power on spool 22 are as follows: F1=P1×A1；
The oil pressure P of oil return opening 112Act on the power on spool 22 are as follows: F2=P2×A2；
Oil pressure P in spring cavity 302The power on spool 2 is acted on pressure spring 41 are as follows:
F3=P2×(A1+A2-A3)+FSpring；
F1And F2For the power for pushing spool 2 towards spring base 40, F3For towards oil inlet 10 push spool 2 power, according to valve
The stress balance formula F of core 21+F2=F3It can derive: P1×A1=P2×(A1-A3)+FSpring.It can thus be seen that in A3No
When being zero, the setting that the body of rod 401 runs through spring cavity 30 and extend out to outside spring cavity 30 can reduce back pressure to a certain extent
P2For the oil pressure P of oil inlet 101Influence.Especially, work as A3With A1When equal, in above-mentioned formula with P2Relevant power is eliminated,
At this point, the oil pressure P of oil inlet 101Only power F is compressed by the elasticity that pressure spring 41 acts on spring base 40SpringInfluence, without by
Back pressure in spring cavity 30 influences.
When spring base 40 directly compresses spool 2 according to mode shown in Fig. 1 and Fig. 2, pedestal 400 towards spool 2 one
Be formed with bellmouth 4000 on side, the part that this one end of spool 2 is protruded into the bellmouth 4000 is set as spherical surface, and with this
The inner surface spherical surface of bellmouth 4000 is tangent, in this way, can produce a small amount of moving between spool 2 and spring base 40, reduce because
The flow of oil liquid it is unstable and caused by the shake of spool 2 and utter long and high-pitched sounds.One end of the oil inlet 10 for contacting at valve body 1 of spool 2 is arranged
There is the conical surface 21, and oil inlet 10 is sealed by the contact with oil inlet 10 of the conical surface 21, is formed between spool 2 and oil inlet 10
The sealing of " K " shape can decrease or even eliminate the leakage of pressure-regulating valve.
In several embodiments it is contemplated that arriving the assembly problem of pressure-control valve, valve pocket 3 includes two parts: the first valve pocket
31 and second valve pocket 32, in which: one end of the first valve pocket 31 is removably connected on valve body 1, and the second valve pocket 32 removably connects
It is connected on the other end of the first valve pocket 31.Second valve pocket 32 is formed at the position that the body of rod 401 stretches out stretches out hole 320, in order to
Better seal spring cavity 30 is arranged on the body of rod 401 and is slidingly sealed plug 5.This is slidingly sealed plug 5 and is entirely located in spring cavity 30
It is interior, also, be slidingly sealed plug 5 and the body of rod 401 between be provided with sealing both first seal 6, be slidingly sealed plug 5 with
The second seal 60 for being slidingly sealed the two is provided between 30 internal perisporium of spring cavity, in this way, being slidingly sealed plug 5 is formed as spring
The sealing of " top cover " of chamber 30, the side wall of spring cavity 30 and bottom wall then being spirally connected by the first valve pocket 31 and the second valve pocket 32 respectively
Sealing and the sealing that is spirally connected of the first valve pocket 31 and valve body 1 are realized.
It is appreciated that being slidingly sealed the sole mode that plug 5 is not Packing spring chamber 30, when the body of rod 401 and hole 320 is stretched out
Between formed reliably when being slidingly sealed, being slidingly sealed plug 5 can cancel.Further, gasket is additionally provided in spring cavity 30
9, the one side of the gasket 9, which reclines, is slidingly sealed plug 5, and the upper end of pressure spring 41 contradicts the another side of the gasket 9, so as to adjust
Pressing spring 41 is held in compressive state, or is further compressed.
It stretches out on hole 320 and is provided with adjusting screw rod 7, which, which is bolted in, stretches out on hole 320, and bullet is protruded into one end
It is compressed in spring chamber 30 and is slidingly sealed plug 5, rotation adjusting screw rod 7 controls its length for protruding into spring cavity 30, and it is close to can control sliding
The position of blocking 5, and then adjust the decrement of pressure spring 41.
In some embodiments, stepped hole 70, the body of rod are formed on one end for protruding into spring cavity 30 on adjusting screw rod 7
401 upper end can be protruded into the stepped hole 70, and one end which protrudes into far from the body of rod 401 is connected in air, with
Make the pressure atmospheric pressure of 401 upper surface of the body of rod.
The locking nut 8 being provided with outside spring cavity 30 on adjusting screw rod 7 stretches out the second valve with adjusting screw rod 7
The screwing sections of set 32, and the position for locking adjusting screw rod 7.
In hydraulic system using above-mentioned pressure-control valve, since the oil inlet operating pressure of pressure-control valve is not by oil return
Mouth back pressure influences, and therefore, the Median Function of the reversal valve of hydraulic system is unrestricted, can be according to holding in hydraulic system
The needs of units and suitably selected.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of pressure-control valve, which is characterized in that the pressure-control valve includes:
Valve body (1) is formed with oil inlet (10) and oil return opening (11) thereon；
Spool (2) is slideably positioned in the valve body (1), and can separate or be connected the oil inlet (10) and described go back to
Hydraulic fluid port (11) is formed with the first oil duct (20) that one end is connected to the oil return opening (11) on the spool (2)；
Valve pocket (3) is sealedly attached on the valve body (1), and is formed with spring cavity (30) in inside；
Regulation component (4) comprising the spring base (40) being slideably positioned in the spring cavity (30), and it is sheathed on the bullet
Pressure spring (41) on spring abutment (40), wherein
One end of the spring base (40) is extend out in air through the spring cavity (30) and from the spring cavity (30), another
End is formed with the second oil duct (402) on the spring base (40) for pushing the spool (2), and second oil duct (402) is even
Lead to first oil duct (20) and the spring cavity (30)；
The pressure spring (41) is sheathed on the spring base (40) with compressive state and can be towards the oil inlet (10)
Push the spring base (40).
2. pressure-control valve according to claim 1, which is characterized in that the spring base (40) includes described for pushing
The pedestal (400) of spool (2), and along the spool (2) mobile direction from the pedestal (400) towards the spring cavity
(30) body of rod (401) extended outside, the cross-sectional area of the body of rod (401) are equal to the cross section face of the oil inlet (10)
Product.
3. pressure-control valve according to claim 2, which is characterized in that the pedestal (400) is towards the spool (2)
Be formed on one side bellmouth (4000), be formed on the spool (2) can extend into the bellmouth (4000) and with
The spherical surface of the inner surface contact of the bellmouth (4000).
4. pressure-control valve according to claim 2, which is characterized in that the spool (2) contacts at the oil inlet
(10) one end is formed with the tapered surface (21) for contacting at the oil inlet (10).
5. pressure-control valve according to claim 2, which is characterized in that the valve pocket (3) is stretched out in the body of rod (401)
One end be formed with and stretch out hole (320), be additionally provided in the spring cavity (30) and be socketed on the body of rod (401) and seal institute
That states spring cavity (30) is slidingly sealed plug (5).
6. pressure-control valve according to claim 5, which is characterized in that described to be slidingly sealed plug (5) and the body of rod
(401) first seal (6) for being slidingly sealed the two is provided between, and/or, it is described to be slidingly sealed plug (5) and the spring
It is provided with the second seal (60) for being slidingly sealed the two between the internal perisporium of chamber (30), is additionally provided in the spring cavity (30)
Side against it is described be slidingly sealed plug (5), the other side compresses the gaskets (9) of the pressure spring (41).
7. pressure-control valve according to claim 6, which is characterized in that also set up and be bolted on the stretching hole (320)
Adjusting screw rod (7), one end that the adjusting screw rod (7) protrudes into the spring cavity (30) press on it is described be slidingly sealed on plug (5),
The appearance body of rod (401) is additionally provided on the adjusting screw rod (7) to protrude into and be connected to the stepped hole in air (70).
8. pressure-control valve according to claim 7, which is characterized in that be bolted on the adjusting screw rod (7) positioned at institute
State valve pocket (3) outside and the locking nut (8) for locking the adjusting screw rod (7) position.
9. pressure-control valve according to claim 1, which is characterized in that the valve pocket (3) includes being detachably connected to institute
State the first valve pocket (31) on valve body (1), and the second valve pocket (32) being detachably connected with first valve pocket (31).
10. pressure-control valve according to claim 1, which is characterized in that first oil duct (20) includes being parallel to institute
The longitudinal sections stating the traversing section (200) of oil return opening (11) axis direction extension and extending along the spool (2) moving direction
(201), second oil duct (402) includes and axially extending first duct (4020) of the longitudinal sections (201), and connection
The second duct (4021) of first duct (4020) extremely the spring cavity (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554553.6A CN109723692B (en) | 2018-12-18 | 2018-12-18 | pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554553.6A CN109723692B (en) | 2018-12-18 | 2018-12-18 | pressure control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109723692A true CN109723692A (en) | 2019-05-07 |
| CN109723692B CN109723692B (en) | 2023-11-03 |
Family
ID=66296809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811554553.6A Active CN109723692B (en) | 2018-12-18 | 2018-12-18 | pressure control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109723692B (en) |
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|---|---|---|---|---|
| CN1040420A (en) * | 1989-05-19 | 1990-03-14 | 刘长年 | Multifunctional floating pressure control valve |
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| CN104989690A (en) * | 2015-06-29 | 2015-10-21 | 象山盛韵汽配科技有限公司 | Overload relief valve |
| CN105065360A (en) * | 2015-08-31 | 2015-11-18 | 苏州萨伯工业设计有限公司 | Constant-power control device and pressure variable control method thereof |
| CN105179349A (en) * | 2015-09-23 | 2015-12-23 | 中国煤炭科工集团太原研究院有限公司 | Automatic pressure switching selector valve |
| CN105697828A (en) * | 2016-03-11 | 2016-06-22 | 柳州柳工液压件有限公司 | Hydraulic control one-way valve |
| DE102016200458A1 (en) * | 2015-01-16 | 2016-07-21 | Xuzhou Construction Machinery Group Co., Ltd. | Load sensing multiway valve and hydraulic system of a technical machine |
| CN106545486A (en) * | 2015-09-21 | 2017-03-29 | 北京通汇知压缩机制造有限公司 | Membrane compressor servo valve |
| WO2017097267A1 (en) * | 2015-12-07 | 2017-06-15 | 常州市康士达机电有限公司 | Electromagnetic directional control valve |
| CN108087364A (en) * | 2017-12-19 | 2018-05-29 | 番禺珠江钢管（珠海）有限公司 | A kind of double pressure unloading valves |
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2018
- 2018-12-18 CN CN201811554553.6A patent/CN109723692B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040420A (en) * | 1989-05-19 | 1990-03-14 | 刘长年 | Multifunctional floating pressure control valve |
| DE102005057489A1 (en) * | 2005-12-01 | 2007-06-06 | Bosch Rexroth Ag | Hydraulic valve e.g. pressure, flow or distribution valve, has spring plate with external thread, which is screwed into thread section of valve housing |
| CN202579413U (en) * | 2012-05-31 | 2012-12-05 | 常德中联重科液压有限公司 | Direct-acting overflow valve, direct-acting overflow valve group and hydraulic overflow loop |
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| CN104989690A (en) * | 2015-06-29 | 2015-10-21 | 象山盛韵汽配科技有限公司 | Overload relief valve |
| CN105065360A (en) * | 2015-08-31 | 2015-11-18 | 苏州萨伯工业设计有限公司 | Constant-power control device and pressure variable control method thereof |
| CN106545486A (en) * | 2015-09-21 | 2017-03-29 | 北京通汇知压缩机制造有限公司 | Membrane compressor servo valve |
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| CN105697828A (en) * | 2016-03-11 | 2016-06-22 | 柳州柳工液压件有限公司 | Hydraulic control one-way valve |
| CN108087364A (en) * | 2017-12-19 | 2018-05-29 | 番禺珠江钢管（珠海）有限公司 | A kind of double pressure unloading valves |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109723692B (en) | 2023-11-03 |
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