CN1133025C - Bidirectional differential pressure feedback type proportional pilot control slide valve - Google Patents
Bidirectional differential pressure feedback type proportional pilot control slide valve Download PDFInfo
- Publication number
- CN1133025C CN1133025C CN 02110594 CN02110594A CN1133025C CN 1133025 C CN1133025 C CN 1133025C CN 02110594 CN02110594 CN 02110594 CN 02110594 A CN02110594 A CN 02110594A CN 1133025 C CN1133025 C CN 1133025C
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- valve
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- valve body
- slide valve
- spool
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 13
- 238000013016 damping Methods 0.000 claims abstract description 15
- 239000002828 fuel tank Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 34
- 239000012530 fluid Substances 0.000 description 18
- 230000009467 reduction Effects 0.000 description 13
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 230000002153 concerted effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
The invention relates to a bidirectional differential pressure feedback type proportional pilot control slide valve which comprises a valve body (1), a valve core (2), dampers (8 and 9) and two proportional electromagnets (3 and 4). The valve is characterized in that the valve core (2) is provided with two serial conjoined plungers (12, 14), the serial conjoined plungers (12, 14) can move along with the valve core (2), and the valve body (1) is provided with a horizontal channel (13) which is matched with the diameter of the valve core (2) and is horizontally arranged. The damping channel (8) is arranged on the left lower side of the proportional pilot control slide valve body (1) between the left channel (11) and the longitudinal channel (21), and the damping channel (9) is arranged on the right lower side of the proportional pilot control slide valve body (1) between the right channel (15) and the longitudinal channel (21). The invention has reasonable structure, simple process and convenient processing. The hydraulic control valve is suitable for a pilot stage of an electro-hydraulic proportional directional flow valve, or directly controls a hydraulic transmission system by utilizing the bidirectional pressure difference of the pilot stage.
Description
Technical field
The present invention relates to a kind of bidirectional pressure difference feedback type proportion pilot controlled slide valve, be applicable to the pilot stage of electric-hydraulic proportion directional flow valve, or utilize its bidirectional pressure difference can make its displacement power controlling become hundred times of amplifications.
Background technique
The present invention is existing " pressure difference feedback type precontrolled slide valve " expanded on (application number 01126635.X) basis and formed, comparatively approximate on the technical pattern in the existing bidirectional pressure difference feedback type proportion pilot controlled slide valve is the 4WRZ16 type pilot controlled slide valve that German REXROTH company produces, and its structure is shown in Figure 6.This control guiding valve is made up of proportion electro-magnet 1 and 2, valve body 3, pilot controlled slide valve core 4 and two presser sensor spools 5 and 6, though this valve can obtain different pressure reduction in A, B chamber, but because the two ends blind hole of pilot controlled slide valve core 4 and the responsive spool accuracy to size that cooperates with it, geometrical shape, form and position tolerance and surface finishment require very high, cause difficulty of processing to increase, the manufacturability difference causes cost of production to improve greatly.If above-mentioned technical requirements is overproof slightly, can cause that all the sensitivity of control guiding valve reduces disabler.
Summary of the invention
Technical problem to be solved by this invention provides a kind of rational in infrastructure, excellent performance, reliable bidirectional pressure difference feedback type proportion pilot controlled slide valve is active in one's movements.Simultaneously being convenient to machining, technology again simply, does not need special precise machining equipment can drop into batch process.
The present invention solves the problems of the technologies described above the technological scheme that is adopted: select slide-valve structure for use, two two-way proportional solenoids 3,4 are set control the opening amount of above-mentioned guiding valve throttling limit and valve port, realization pressure reduction feedback is to improve valve core movement reliability and sensitivity.
The present invention is made up of control guiding valve valve body, spool and two proportion electro-magnets.Described proportion pilot controlled slide valve valve body is provided with the crosspassage of the horizontal arrangement that matches with spool, dispose spool in this crosspassage, this spool is provided with two serial type disjunctor plungers, this serial type disjunctor plunger can move, stop up or open the communication of crosspassage and other passage with spool, the two ends of spool with about concentric the contacting of push rod of two electromagnet.The left side of proportion pilot controlled slide valve valve body, be provided with left channel, the right side of proportion pilot controlled slide valve valve body, be provided with right channel, the vertical passage that proportion pilot controlled slide valve valve body middle part is provided with also that the lower end is linked up mutually with the pressure oil P interface that oil pump is exported, the crosspassage of upper end and spool is linked up mutually.Be provided with left damp channel in left channel and between vertically leading to, between right channel and vertical passage, be provided with right damp channel, be provided with damping hole in the above-mentioned damp channel.Proportion pilot controlled slide valve valve body top (also can be arranged on other position of valve body) also is provided with upper left vertical passage and upper right vertical passage, the upper left vertical passage of proportion pilot control valve is all linked up with fuel tank mutually with the upper end of upper right vertical passage, and the lower end is linked up mutually with the crosspassage of valve body.
Described left and right sides damp channel is located in the lower, transverse passage of proportion pilot controlled slide valve valve body, and wherein left damp channel is linked up mutually with left channel, and right damp channel is linked up mutually with right channel.Be provided with four hydraulic fluid port A, B, P, T on the valve body of proportion pilot controlled slide valve altogether, P and pressure oil phase are linked up, and T links up mutually with fuel tank, and A, B then link up with operating cylinder left and right sides oil circuit respectively mutually.
The pressure oil that oil pump is supplied with, enter P hydraulic fluid port on the valve body, pressure oil is by the right and left damping hole, enter hydraulic fluid port A and hydraulic fluid port B respectively, be full of left and right sides electromagnet and push rod space on every side simultaneously, another road enters the shoulder groove in the middle of two serial type disjunctors of spool plunger, with the distribution of the radial force of improving spool.When the right and left electromagnet produces equal initial stage power F respectively
0The time, on the spool about the electromagnetic force and the hydraulic coupling of two electromagnet all be in state of equilibrium, this moment, spool kept the neutral position, two control limits make the oil outlet sealing of valve block upper half about it.This moment, oil did not flow in valve body, did not produce pressure reduction, and at this moment pilot controlled slide valve is in off position.
When the electromagnetic force of left side electromagnet increases to F
1The time, (F
1＞F
0), the electromagnetic force about spool is balance no longer, and it makes a concerted effort to make spool to move right, and it is open that the limit is controlled on the left side of spool, and pressure oil to the A chamber, is controlled limit, oil outlet T oil sump tank through a left side by P hydraulic fluid port process damping hole again.This road control oil produces pressure drop, i.e. P in the front and back of damping hole 5
A＜P is designated as:
ΔP＝P-P
A
Meanwhile, the oil on B chamber and spool right side is circulation not, and pressure wherein is still P,
Produce hydraulic resultant force left on the spool, pressure reduction feedback that Here it is.Its size is:
F＝1/4∏D
2ΔP
The F-hydraulic resultant force
D-valve core diameter
Because the opening amount on throttling spool limit can be regulated automatically, last stabilizing solution pressure and electromagnetic force
State balances each other.Promptly
1/4∏D
2ΔP＝F
1-F
0
Between B hydraulic fluid port and A hydraulic fluid port, exist onesize stable pressure reduction, if, realize the commutation of directional flow valve main valve plug with this with the pilot stage of this pressure reduction as the directional flow valve, composition directional flow valve then.If promote the control oil cylinder with this pressure reduction, then can obtain with the proportional different displacements of size of current.Because A, B hydraulic fluid port exist onesize stable pressure reduction, this differential pressure action is on the piston of oil cylinder, and hydraulic coupling will overcome the spring force of spring this moment, and piston is produced to left dislocation X.As shown in Figure 3.
Same principle is if the electromagnetic force on right side increases to F
2, the F in left side
0Remain unchanged, can make the piston of oil cylinder produce displacement amount X to the right.As shown in Figure 4.
In sum, in hydraulic system, draw two road binders stream,, can alternately change the pressure reduction of two road binders stream, use this pressure reduction, can realize various control actions the benchmark hydraulic fluid port through the control of this valve.
Compared with prior art, the invention has the advantages that rational in infrastructure, technology is simple, be convenient to machining, do not need high precise equipment can drop into batch process.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is a kind of structural representation (hydraulic coupling is in state of equilibrium) of the embodiment of the invention and main valve body.
Fig. 3 is 1 (piston produces displacement left) of the fundamental diagram of the embodiment of the invention.
Fig. 4 is 2 (piston produces displacement to the right) of the fundamental diagram of the embodiment of the invention.
Fig. 5 is used for reversed flow metered valve schematic representation in the embodiment of the invention.
Fig. 6 is a kind of prior art constructions figure.
Embodiment
(invention) describes in further detail to the utility model below in conjunction with accompanying drawing embodiment.
Fig. 1 to Fig. 4 is the first embodiment of the present invention, and at this, the present invention is used to the displacement on main valve plug 23 left and right sides both directions, realizes the usefulness of accurate quantification control and/or transmission of power.
The present invention includes guiding valve valve body 1, spool 2 and proportion electro- magnet 3,4, described proportion pilot controlled slide valve valve body 1 has the crosspassage 13 of the horizontal arrangement that matches with spool 2, dispose spool 2 in the crosspassage 13, this spool 2 is provided with two serial type disjunctor plungers 12,14, this serial type disjunctor plunger 12,14 can move, stop up or open the communication of crosspassage 13 and other passage with spool 2, push rod 10 concentric the contacting of the left end of spool 2 and left electromagnet 3.Push rod 16 concentric the contacting of the right-hand member of spool 2 and right electromagnet 4.The left side of proportion pilot controlled slide valve valve body 1, be provided with left channel 11, the right side of proportion pilot controlled slide valve valve body 1, be provided with right channel 15, proportion pilot controlled slide valve valve body 1 middle part also is provided with the vertical passage 21 that lower end and the crosspassage 13 of oil pump (or pressure oil) 24 communications mutually, upper end and spool 2 are linked up mutually.Between left channel 11 and vertical passage 21, be provided with left damp channel 17, be provided with left damping hole 8 in the above-mentioned left damp channel 17, between right channel 15 and vertical passage 21, be provided with right damp channel 18, in the above-mentioned right damp channel 18, be provided with right damping hole 9, upper end in left channel 11, link up mutually with the left end of crosspassage 13, lower end in left channel 11, link up mutually with the left chamber 20 of main valve 26,, link up mutually with the right-hand member of crosspassage 13 in the upper end of right channel 15, in the lower end of right channel 15, link up mutually with the right chamber 25 of main valve 26.The top of proportion pilot controlled slide valve valve body 1 also is provided with upper left vertical passage 5 and upper right vertical passage 6, and upper left vertical passage 5 upper ends of proportion pilot controlled slide valve valve body 1 are linked up mutually with fuel tank 7, and the lower end is linked up mutually with the crosspassage 13 of valve body 1.Upper right vertical passage 6 upper ends of proportion pilot controlled slide valve valve body 1 are linked up mutually with fuel tank 7, and the lower end is linked up mutually with crosspassage 13 right-hand members of valve body 1.
Be provided with four hydraulic fluid port A, B, P, T on the valve body of proportion pilot controlled slide valve altogether, wherein P and pressure oil phase are linked up, and T links up mutually with fuel tank, and A, B then link up with the left chamber 20 of main valve 26, right chamber 25 respectively.
When the electromagnetic force of left side electromagnet 3 increases to F
1The time, (F
1＞F
0), the electromagnetic force of spool about 2 is balance no longer, and it makes a concerted effort to make spool 2 to move right, and the control limit, a left side of spool 2 is open, and pressure oil is by P hydraulic fluid port process damping hole 5 to A chambeies, again through control limit, a left side, oil outlet T oil sump tank.Control oil in this road produces pressure drop in the front and back of damping hole 5, and the opening amount on throttling spool limit can be regulated automatically, last stabilizing solution pressure and the electromagnetic force state that balances each other.Because A, B hydraulic fluid port exist stable pressure reduction, this differential pressure action is on main valve plug 23, and hydraulic coupling will overcome the spring force of spring this moment, and piston is produced to left dislocation X, as shown in Figure 3.If the electromagnetic force on right side increases to F
2, the F in left side
0Remain unchanged, can make the piston of oil cylinder produce displacement amount X to the right, as shown in Figure 4.
Fig. 5 is the second embodiment of the present invention, and at this, the present invention is used to realize that the oil mass output to A, B oil outlet realizes accurate quantification control.This valve top acts on pilot stage with bidirectional pressure difference feedback type proportion pilot controlled slide valve 510, after proportion electro-magnet 51 obtains certain electric current, electromagnetic force moves to right guide's spool 53, open on throttling limit, left side 511, the passage of pressure oil in main valve 57, passage and damping hole 55 in guide's valve body 52,56, enter the two ends of guide's valve body 52 and main valve 57 respectively, and because the unlatching of guide's spool 53, cause the oil part in pilot valve 510 left sides to arrive the T mouth through throttling limit, a pilot valve left side 511, produce pressure reduction, make the pressure of the pressure in pilot valve 510 and main valve 57 left sides less than the right side, at this moment, main valve plug 58 is under the effect of hydraulic coupling, the spring force that overcomes spring 59 is moved to the left, because main valve plug 58 has axial triangular groove 512 at the shoulder place, this moment, the hydraulic fluid port of main valve 57 was closed gradually by P to B, by P to A conducting gradually, flow is ascending.When making a concerted effort during balance of the spring force of the hydraulic coupling that acts on main valve plug 58 right sides and the hydraulic coupling, the spring 59 that act on main valve plug 58 left sides, main valve plug 58 stops at certain and puts, realize that hydraulic oil flows to A by P, and the size of its flow, the increase or the minimizing that are in proportion with the input current of proportion electro-magnet 54.
Equally, after proportion electro-magnet 54 obtains certain electric current, the pressure in pilot valve 510 and main valve 57 left sides is greater than the pressure on right side, main valve plug 58 makes hydraulic fluid port P, A close gradually, hydraulic fluid port is by P to B conducting gradually, the size of its flow, the increase or the minimizing that are in proportion with the input current of proportion electro-magnet 54.
Claims (4)
1. bidirectional pressure difference feedback type proportion pilot controlled slide valve, it includes proportion pilot controlled slide valve valve body (1), spool (2) and two proportion electro-magnets (3), (4); It is characterized in that: described proportion pilot controlled slide valve valve body (1) is provided with the crosspassage (13) of the horizontal arrangement that matches with spool (2), dispose spool (2) in this crosspassage (13), on this spool (2), be provided with two serial type disjunctor plungers (12), (14), this serial type disjunctor plunger (12), (14) can move with spool (2), stop up or open the communication of crosspassage (13) and other passage, concentric the contacting of push rod (10) of the left end of spool (2) and left electromagnet (3), concentric the contacting of push rod (16) of the right-hand member of spool (2) and right electromagnet (4), the left side of proportion pilot controlled slide valve valve body (1), be provided with left channel (11), the right side of proportion pilot controlled slide valve valve body (1), be provided with right channel (15), proportion pilot controlled slide valve valve body (1) middle part, also be provided with the vertical passage (21) that the crosspassage (13) of upper end that the pressure oil P interface of lower end and oil pump (24) output links up mutually and spool (2) is linked up mutually, between left channel (11) and vertical passage (21), be provided with left damp channel (17), be provided with left damping hole (8) in the above-mentioned left damp channel (17), between right channel (15) and vertical passage (21), be provided with right damp channel (18), in the above-mentioned right damp channel (18), be provided with right damping hole (9), upper end in left channel (11), link up mutually with the left end of crosspassage (13), lower end in left channel (11), link up mutually with the left chamber (20) of main valve (26), upper end in right channel (15), link up mutually with the right-hand member of crosspassage (13), lower end in right channel (15), link up mutually with the right chamber (25) of main valve (26), the top of proportion pilot controlled slide valve valve body (1), also be provided with upper left vertical passage (5) and upper right vertical passage (6), upper left vertical passage (5) upper end of proportion pilot controlled slide valve valve body (1) is linked up mutually with fuel tank (7), the lower end is linked up mutually with the crosspassage (13) of valve body (1), upper right vertical passage (6) upper end of proportion pilot controlled slide valve valve body (1) is linked up mutually with fuel tank (7), and the lower end is linked up mutually with crosspassage (13) right-hand member of valve body (1).
2. bidirectional pressure difference feedback type proportion pilot controlled slide valve as claimed in claim 1, it is characterized in that: described damping hole (58,59) is the central openings (56) that is opened on cylindrical jacket casing (513) bottom surface, processed connecting thread on the outer peripheral surface of described cylindrical jacket casing (513).
3. bidirectional pressure difference feedback type proportion pilot controlled slide valve as claimed in claim 1 is characterized in that: described P interface and pressure oil pump are connected.
4. bidirectional pressure difference feedback type proportion pilot controlled slide valve as claimed in claim 1 is characterized in that: described P interface and high-pressure oil passage are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110594 CN1133025C (en) | 2002-01-18 | 2002-01-18 | Bidirectional differential pressure feedback type proportional pilot control slide valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110594 CN1133025C (en) | 2002-01-18 | 2002-01-18 | Bidirectional differential pressure feedback type proportional pilot control slide valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1373311A CN1373311A (en) | 2002-10-09 |
| CN1133025C true CN1133025C (en) | 2003-12-31 |
Family
ID=4741158
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02110594 Expired - Fee Related CN1133025C (en) | 2002-01-18 | 2002-01-18 | Bidirectional differential pressure feedback type proportional pilot control slide valve |
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| Country | Link |
|---|---|
| CN (1) | CN1133025C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121487B (en) * | 2011-03-04 | 2013-07-24 | 华中科技大学 | Pilot-operated type water hydraulic pressure digital proportional direction valve |
| CN104806596B (en) * | 2015-05-18 | 2016-10-26 | 上海新跃仪表厂 | A kind of mechanical type hydraulic oil sources selector valve |
| CN105697441A (en) * | 2016-01-08 | 2016-06-22 | 洪子云 | Hydraulic travel automatic reversing valve and hydraulic control system of rotating pump hole forming pile machine |
| CN106351901B (en) * | 2016-08-31 | 2018-04-27 | 北京精密机电控制设备研究所 | A kind of constant flow control valve of damping network and two-stage guiding valve composition |
| CN106195344B (en) * | 2016-09-23 | 2018-12-25 | 江西洪都航空工业集团有限责任公司 | Flow equilibrium proportional control valve |
| CN110486504B (en) * | 2019-08-25 | 2020-12-22 | 江苏科迈液压控制***有限公司 | Low-power-consumption large-flow electromagnetic valve |
| CN110630805B (en) * | 2019-09-26 | 2021-01-01 | 长安大学 | Rapid solenoid valve system of aircraft engine and control method thereof |
| CN113175458B (en) * | 2021-05-14 | 2022-10-04 | 中国船舶重工集团公司第七0七研究所九江分部 | Multistage damping low-noise reversing valve |
| CN115095572B (en) * | 2022-07-21 | 2024-05-28 | 湖南十开科技有限公司 | Double-acting electro-hydraulic proportional push rod and electro-hydraulic proportional multi-way valve |
-
2002
- 2002-01-18 CN CN 02110594 patent/CN1133025C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1373311A (en) | 2002-10-09 |
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Granted publication date: 20031231 Termination date: 20120118 |