CN102454650A - Hydraulic differential pilot opening mechanism - Google Patents
Hydraulic differential pilot opening mechanism Download PDFInfo
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- CN102454650A CN102454650A CN2011102638210A CN201110263821A CN102454650A CN 102454650 A CN102454650 A CN 102454650A CN 2011102638210 A CN2011102638210 A CN 2011102638210A CN 201110263821 A CN201110263821 A CN 201110263821A CN 102454650 A CN102454650 A CN 102454650A
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Abstract
The invention discloses a hydraulic differential pilot opening mechanism. The mechanism aims to overcome the defect that the service life of a pilot valve plug and a pilot valve bush is easy to reduce, and the pilot valve plug and the pilot valve bush vibrate seriously and are large in noise due to large impact between the pilot valve plug and the pilot valve bush in the conventional hydraulic pilot opening mechanism. In the pilot opening mechanism, a differential pilot valve is arranged in a pilot valve cavity; a first cavity which is communicated with an oil inlet is formed on the inner side of the pilot valve; a second cavity which is communicated with the first cavity through an orifice is formed on the outer side of the pilot valve; a pilot valve plug is arranged in a pilot valve seat in a slidable way; a sealing cone of the pilot valve plug is positioned in the first cavity and is connected with a first buffer spring; the side of the second cavity is provided with a pressure regulation spring which is connected with the pilot valve seat; and a pilot valve gap between the pilot valve seat and the pilot valve plug, a radial through hole and an oil outlet form a leakage oil way for opening the pilot valve. Through the differential pilot valve, the inverse pilot valve plug, the buffer spring, the axial movable pilot valve seat, the pilot valve plug and the damping action of the pilot valve gap, the impact force during closing of the pilot valve is reduced, the pilot valve plug is always in the stable state, and the hydraulic differential pilot opening mechanism has the advantages of small impact, long service life, stability and low noise.
Description
Technical field
The present invention relates to the guide's opening mechanism in the hydraulic element of hydraulic system, particularly hydraulic system.
Technical background
In hydraulic control valves such as existing relief valve, reduction valve, a kind of hydraulic pilot opening mechanism commonly used is controlled the hydraulic pressure in the control valve main valve plug Returnning spring chamber, opens main valve plug through the hydraulic pressure that reduces in the main valve plug Returnning spring chamber.But in existing hydraulic pilot opening device; As shown in Figure 1; Guide valve bushing 5 is fixed; The column register pin of guide valve core 4 through its top be positioned in the valve opening of guide valve bushing and with valve opening for intermittently cooperating, this structure is to utilize pressure adjusting spring 7 to come the active force of the suffered hydraulic oil of balance guide valve core, so requires the rigidity of pressure adjusting spring 7 very high.Control valve is frequent the open and close along with the pressure surge in the hydraulic system, and guide valve core and guide valve seat also just open and close continually.Because it is fixed during guide valve seat in existing guide's opening mechanism; This just causes the very big impact of generation between the valve opening point limit of pilot valve guide valve core 4 and guide valve seat 5 when opening and closing; Make pilot valve cause damage, reduce control valve working life in certain operating time internal cause impact force; And pilot valve is when opening; Guide valve core is in quick condition in the valve opening of guide valve seat, guide valve core 4 is Off center usually, and guide valve core and valve opening are collided each other; Produce vibration and produce noise; Even produce the phenomenon of uttering long and high-pitched sounds, and increase the noise radiation of machine, be difficult to satisfy the requirement of construction machinery hydraulic system.Therefore, this just need design between pilot valve spool and the pilot valve valve pocket impact little, good stability, noise is little, guide's opening mechanism of long service life.
Summary of the invention
Order of the present invention be the pilot valve to existing hydraulic pilot opening mechanism be hit big and fragile, the life-span short; And pilot valve guide valve core when opening is in the shortcoming that quick condition is prone to the generation vibration and utters long and high-pitched sounds; And a kind of good stability is provided; Noise is little, the hydraulic difference dynamic formula guide opening mechanism of long service life.
Technological scheme of the present invention is achieved in that a kind of hydraulic difference dynamic formula guide opening mechanism of structure, formation pilot valve chamber in the bonnet that it comprises a valve body, is spirally connected with valve body, valve body and bonnet; Slide in the pilot valve chamber pilot valve is set, the inboard of pilot valve is first cavity volume, and valve body is provided with the filler opening that is communicated with first cavity volume; The pilot valve outside is provided with second cavity volume, is provided with the throttle orifice that is communicated with first cavity volume and second cavity volume in the pilot valve, and pilot valve comprises guide valve core and guide valve seat; Guide valve seat and pilot valve cavity wall sliding fit, guide valve seat be provided with one axially connect guide valve seat the pilot valve hole, guide valve core comprise guide portion, the afterbody of head the sealing awl, connect the joint of guide portion and sealing awl; The sealing awl is positioned at first cavity volume; Can form sealing with the sharp limit in pilot valve hole and contact, guide portion and said pilot valve hole sliding fit have the pilot valve gap between joint and the pilot valve hole; Guide valve seat is provided with the radial direction through hole that is communicated with the pilot valve gap, and valve body is provided with the oil outlet that is communicated with radial direction through hole; Be provided with damping spring in first cavity volume; One end of damping spring is connected with guide valve core; The other end is connected with said valve body, in second cavity volume if guide valve core to the shift motion of the second cavity volume direction less than the limit stoper of guide valve seat to the sliding stroke of the second cavity volume direction, be provided with pressure adjusting spring in the outside of pilot valve; One end of pressure adjusting spring is connected with the guide valve seat contact, and the other end is connected with bonnet; Liquid effects acts on the axial area on the pilot valve in the axial area on the pilot valve greater than second intracavity liquid in first cavity volume.
Hydraulic difference dynamic formula guide opening mechanism working principle of the present invention is following: first cavity volume is connected with the Returnning spring chamber of all kinds of control valve main valve plugs through filler opening; Because pilot valve is positioned at the axially loaded area of first cavity volume is positioned at second cavity volume greater than pilot valve axially loaded area; When the pressure in first cavity volume reaches the set pressure of opening mechanism; Hydraulic oil in first cavity volume and damping spring to the active force of pilot valve greater than hydraulic oil and pressure adjusting spring in second cavity volume to the active force of pilot valve, make pilot valve move (hydraulic oil of second cavity volume also flows to first cavity volume through throttle orifice), when guide valve core contacts with limit stoper to second cavity volume; Guide valve core stops to move; Guide valve seat continues to move to the direction of second cavity volume, and the valve opening of the sealing awl of guide valve core and guide valve seat point limit disengages at this moment, and first cavity volume is communicated with the pilot valve gap; Hydraulic oil in first cavity volume flows out first cavity volume through pilot valve gap, radial direction through hole, oil outlet; Pressure in first cavity volume is reduced rapidly, thereby reduce the pressure in the control valve main valve plug Returnning spring chamber that is connected with first cavity volume, make main valve plug be able to open and action.Along with the pressure in first cavity volume reduces rapidly; The hydraulic oil of second cavity volume also flows to first cavity volume through throttle orifice; Pressure in second cavity volume also decreases, but because the damping function of throttle orifice, and the pressure of second cavity volume pressure that is lower than in first cavity volume that underspeeds underspeeds; When the pressure in first cavity volume is reduced to the set pressure that opening mechanism closes; Hydraulic oil in first cavity volume and buffering spring to the axial force of pilot valve less than hydraulic oil and pressure adjusting spring in second cavity volume to the axial force of pilot valve, guide valve seat moves to the first cavity volume direction under the effect of pressure adjusting spring, makes the valve opening point limit of guide valve seat bore the conical surface with the sealing of guide valve core and contacts; Disconnection is from the oil circuit in first cavity volume and pilot valve gap; Make the boost in pressure of first cavity volume, thereby also improve the pressure in the control valve main valve plug Returnning spring chamber that is connected with first cavity volume, make main valve plug be able to action and close.The guide valve core of the pilot valve of the present invention through differential type, upside-down mounting is the moving guide valve seat of a side, damping spring, axially-displaceable that guide valve core is installed in a pilot valve oil-feed impact force when closing with the damping function reduction pilot valve in guide valve core and pilot valve gap; And make guide valve core be in a steady state all the time, impact the advantage little, that the life-span is long, noise is low to realize this mechanism.
In hydraulic difference dynamic formula guide opening mechanism of the present invention, as technological improvement further, limit stoper is a limited post, and the one of which end is fixedly connected with bonnet, and the other end is to be used for contacting the positive stop end that is connected with guide valve core.
In hydraulic difference dynamic formula guide opening mechanism of the present invention; As technological improvement further; Throttle orifice is arranged on the said guide valve core; Establish the logical oily passage that end face flows into, flow out the side on the end face of the positive stop end of said limited post, said logical oily passage is communicated with said throttle orifice when guide valve core is connected with the contact of positive stop end end face.This measure is in order to make when guide valve core contacts with the end face of positive stop end, and throttle orifice is communicated with second cavity volume through logical oily passage, can not block its connection with contacting of guide valve core because of the end face of positive stop end.Logical oil duct can be taked various ways, and for example the end face of positive stop end is provided with counterbore, positive stop end the side be provided with the penetration hole that runs through the counterbore sidewall, counterbore contacts when being connected at the guide valve core and the end face of positive stop end and is communicated with the said throttle orifice of leading; The oil groove of the end face that runs through whole positive stop end perhaps is set on the end face of positive stop end, and oil groove is communicated with throttle orifice when guide valve core is connected with the end face contact of positive stop end.
In hydraulic difference dynamic formula guide opening mechanism of the present invention, as technological improvement further, the inboard of bonnet is provided with the endoporus with the limited post socket, and said limited post sleeve is in said endoporus.This measure is in use to prevent adjusting pressuring valve core generation deflection, can the closely cooperate socket or be spirally connected of bonnet and limited post through screw thread, and limited post also can be and the bonnet integrative-structure.Can be provided with the pressure regulation pad between pressure adjusting spring and the bonnet.The pressure regulation pad is used to finely tune the elastic force of pressure adjusting spring to guide valve seat, accurately sets up the pressure that pilot valve is opened.In addition also can be through in bonnet, being provided with locking cap, the limited post fixed hole is established at the center of locking cap, and is fixedly sleeved with limited post, and the outer side surface of locking cap and the inner side surface of bonnet are connected.One end of pressure adjusting spring contacts with locking cap, and pressure adjusting spring withstands on the inboard bottom of bonnet with locking cap.Locking cap with locating column can be threaded, being tightly fixed is connected, welds or be structure as a whole.Also can be provided with the pressure regulation pad between pressure adjusting spring and the locking cap.
In hydraulic difference dynamic formula guide opening mechanism of the present invention, as technological improvement further, the outer side surface that guide valve seat cooperates with the pilot valve cavity wall is provided with first seal groove, and first seal groove is embedded with first seal ring.
In hydraulic difference dynamic formula guide opening mechanism of the present invention; As technological improvement further; Guide valve seat has seal sleeve near the arranged outside of the part of second cavity volume; The madial wall of said seal sleeve and guide valve seat sliding fit, the two ends of seal sleeve are connected with the bonnet contact with valve body respectively.Through seal sleeve is set, can satisfy the coaxality requirement of seal sleeve and guide valve seat easily, guide valve seat can be moved axially therein swimmingly, reduce and make requirement.
In hydraulic difference dynamic formula guide opening mechanism of the present invention; As technological improvement further, guide valve seat can be connected with the limited post sliding fit, and the outside end face in pilot valve chamber is provided with a cavity; The side sliding fit of the sidewall of cavity and limited post, guide valve seat and limited post constitute said second cavity volume.The side that limited post matches with guide valve seat is provided with second seal groove, and said second seal groove is embedded with second seal ring.Seal ring is set is used to promote the sealing that cooperates between them.
The present invention compared with prior art has following beneficial effect:
1, in the hydraulic difference dynamic formula guide opening mechanism of the present invention, guide valve core and guide valve seat all can endwisely slip, and when opening mechanism was closed, guide valve seat guide spool moved, and guide valve core receives the effect of damping spring, the impact when the available buffer guide valve seat contacts with guide valve core; The present invention can make pilot valve receive the lifting surface area of hydraulic oil axial action in second cavity volume to be slightly less than the lifting surface area that pilot valve receives hydraulic oil axial action in first cavity volume through design in addition; Thereby can select the less pressure adjusting spring of rigidity, the impact of guide valve seat and guide valve core when reducing the pilot valve open and close; Moreover, to move when closing at guide valve seat guide spool, damping function can be played in the pilot valve gap, further reduces the impact between guide valve seat and the guide valve core.The present invention through can axially movable guide valve seat, impact force when reduction guide valve seat such as guide valve core, the buffering of damping spring, the damping function in pilot valve gap and guide valve core are closed, thereby prolong working life of pilot valve.
2, among the present invention, guide valve core only can endwisely slip it along guide's valve opening through its guide portion and valve opening sliding fit; Can not produce skew radially, when pilot valve was opened, an end of guide valve core received the extruding of damping spring in addition; The other end contacts with limit stoper; Make it be in a kind of steady state, thus can not produce the vibration in addition utter long and high-pitched sounds, can not increase the noise radiation of machine.
Description of drawings
Fig. 1 is the schematic representation of existing guide's opening mechanism;
Fig. 2 is the structural representation sketch of hydraulic difference dynamic formula guide opening mechanism in the first embodiment of the invention;
Fig. 3 is the structural representation of pilot valve in the first embodiment of the invention;
Fig. 4 is the view when hydraulic difference dynamic formula guide opening mechanism is opened in the first embodiment of the invention;
Fig. 5 is the simplified schematic diagram of hydraulic difference dynamic formula guide opening mechanism in the second embodiment of the invention;
Fig. 6 is the simplified schematic diagram of hydraulic difference dynamic formula guide opening mechanism in the third embodiment of the invention.
Component title and sequence number among the figure:
Embodiment
Below in conjunction with accompanying drawing and embodiment differential type relief valve of the present invention is described.
Embodiment 1:
Formation pilot valve chamber in the bonnet 9 as shown in Figure 2, that this hydraulic difference dynamic formula guide opening mechanism comprises valve body 1, is spirally connected with valve body, valve body and bonnet; Slide in the pilot valve chamber pilot valve is set, the inboard of pilot valve is first cavity volume 3, and valve body 1 is provided with the filler opening 12 that is communicated with first cavity volume 3; The pilot valve outside is provided with second cavity volume 6, is provided with the throttle orifice 13 that is communicated with first cavity volume 3 and second cavity volume 6 in the guide valve core 4, and is as shown in Figure 3; Pilot valve comprises guide valve core 4 and guide valve seat 5, and guide valve seat 5 and pilot valve cavity wall sliding fit, guide valve seat 5 are provided with an axial pilot valve hole that connects guide valve seat; Guide valve core 4 comprise guide portion 18, the afterbody of head sealing awl 14, connect the joint 15 of guide portion and sealing awl; Sealing awl 14 is positioned at first cavity volume 3, and guide portion 18 and pilot valve hole sliding fit have pilot valve gap 16 between joint 15 and the pilot valve hole; Guide valve seat 5 is provided with the radial direction through hole 17 that is communicated with the pilot valve gap, and valve body 1 is provided with the oil outlet 11 that is communicated with radial direction through hole 17; Be provided with damping spring 2 in first cavity volume 3; One end of damping spring 2 is connected with guide valve core 4; The other end is connected with valve body 1, in second cavity volume 6 if guide valve core 4 to the shift motion of second cavity volume 6 less than the limited post 8 of guide valve seat 5 to second cavity volume, 6 sliding strokes, be provided with pressure adjusting spring 7 in the outside of pilot valve; One end of pressure adjusting spring 7 is connected with guide valve seat 5 contacts, and the other end is connected with bonnet 9.One end of limited post 8 is through screw thread or closely cooperate sleeve in the endoporus 28 of bonnet 9; Be fixedly connected with bonnet 9; The other end of limited post 8 is established positive stop end end face 20; The end face of positive stop end end face 20 is provided with counterbore 21, and the side of positive stop end end face 20 is provided with runs through the penetration hole 19 that is communicated with counterbore 21 sidewalls, and counterbore 21 is communicated with throttle orifice 13 when guide valve core 4 is connected with 20 contacts of positive stop end end face.Guide valve seat 5 is positioned at one section inboard diameter of valve pocket is positioned at the valve pocket outside greater than guide valve seat 5 one section diameter; The inwall sliding fit of enlarged diameter section and valve body; The inwall sliding fit of reduced diameter section and bonnet; On large and small diameter section and outer side surface that valve body, bonnet inwall cooperate, respectively be provided with first seal groove 22, seal groove is embedded with first seal ring 23.
Hydraulic difference dynamic formula guide opening mechanism working principle of the present invention is following: first cavity volume 3 is connected with the Returnning spring chamber of all kinds of control valve main valve plugs through filler opening 12; Because pilot valve is positioned at the axially loaded area of first cavity volume 3 is positioned at second cavity volume 6 greater than pilot valve axially loaded area; When the pressure in first cavity volume 3 reaches the set pressure of opening mechanism; The hydraulic oil in first cavity volume 3 and the active force of 2 pairs of pilot valves of damping spring are greater than the active force of hydraulic oil and 7 pairs of pilot valves of pressure adjusting spring in second cavity volume 6; Make pilot valve move (hydraulic oil of second cavity volume 6 also flows to first cavity volume through throttle orifice 13) to the direction of second cavity volume 6, when guide valve core 4 contacted with limited post 8, guide valve core 4 stopped to move; Guide valve seat 5 continues to move to the direction of second cavity volume 6; This moment, the sealing awl 14 of guide valve core 4 disengaged with the sharp limit of the valve opening of guide valve seat 5, and is as shown in Figure 4, and first cavity volume 3 is communicated with pilot valve gap 16; Hydraulic oil in first cavity volume 3 flows out first cavity volume 3 through pilot valve gap 16, radial direction through hole 17, oil outlet 11; Pressure in first cavity volume 3 is reduced rapidly, thereby reduce the pressure in the control valve main valve plug Returnning spring chamber that is connected with first cavity volume 3, make main valve plug be able to open and action.Along with the pressure in first cavity volume 3 reduces rapidly; The hydraulic oil of second cavity volume 6 also flows to first cavity volume 3 through throttle orifice 13; Pressure in second cavity volume 6 also decrease, but because the damping function of throttle orifice, and the pressure of second cavity volume 6 pressure that are lower than in first cavity volume 3 that underspeed underspeed; When the pressure in first cavity volume is reduced to the set pressure that opening mechanism closes; The axial force of 2 pairs of pilot valves of hydraulic oil in first cavity volume 3 and buffering spring is less than the axial force of hydraulic oil and 7 pairs of pilot valves of pressure adjusting spring in second cavity volume 6, and guide valve seat 5 moves to first cavity volume, 3 directions under the effect of pressure adjusting spring, makes the sharp limit of valve opening of guide valve seat 5 bore 14 conical surfaces with the sealing of guide valve core 4 and contacts; Disconnection is from the oil circuit in first cavity volume and pilot valve gap; Make the boost in pressure of first cavity volume, thereby also improve the pressure in the control valve main valve plug Returnning spring chamber that is connected with first cavity volume, make main valve plug be able to action and close.
Embodiment 2:
As shown in Figure 5; Compare with first embodiment; Its difference is: the outside of guide valve seat 5 has a columniform cavity, the sidewall sliding fit of the sidewall of cavity and limited post 8, and guide valve seat 5 constitutes second cavity volume 6 with limited post 8; The side that limited post 8 matches with guide valve seat 5 is provided with second seal groove, 26, the second seal grooves and is embedded with second seal ring 27.Be provided with locking cap 24 in the bonnet 9; The center of locking cap is provided with limited post fixed hole 25, the limited post sleeve in fixed hole 25, with locking cap through closely cooperating or screw thread forms a fixed connection; The inner side surface of the outer side surface of locking cap 24 and bonnet 9 is connected; The contact of pressure adjusting spring 7 and locking cap is connected, and between is provided with pressure regulation pad 10, and pressure adjusting spring 7 is pushed locking cap bottom the bonnet inner bore locking cap to be fixed to.Hydraulic difference dynamic formula guide opening mechanism in the present embodiment communicates with opening mechanism open theory and the action among first embodiment.
Embodiment 3:
As shown in Figure 6; Compare with first embodiment; Its difference is that the reduced diameter section arranged outside of guide valve seat 5 has seal sleeve 29, the reduced diameter section outer side wall sliding fit of the madial wall of seal sleeve 29 and guide valve seat 5; The two ends of seal sleeve 29 contact with bonnet 9 with valve body 1 respectively, receive the extruding of bonnet 9 and carry out axially locating.Present embodiment is through seal sleeve 29 is set, and in the manufacturing process, seal sleeve 29 requires to be met easily with the coaxality of guide valve seat 5, can reduce the difficulty of manufacturing.
Claims (10)
1. hydraulic difference dynamic formula guide opening mechanism, the bonnet (9) that comprises a valve body (1), is spirally connected with valve body, formation pilot valve chamber in said valve body and the bonnet; Slide in the pilot valve chamber pilot valve is set, it is characterized in that the inboard of said pilot valve is first cavity volume (3); Valve body (1) is provided with the filler opening (12) that is communicated with first cavity volume (3), and the pilot valve outside is provided with second cavity volume (6), is provided with the throttle orifice (13) that is communicated with first cavity volume (3) and second cavity volume (6) in the pilot valve; Said pilot valve comprises guide valve core (4) and guide valve seat (5); Said guide valve seat (5) and pilot valve cavity wall sliding fit, guide valve seat (5) be provided with one axially connect guide valve seat the pilot valve hole, said guide valve core (4) comprise guide portion (18), the afterbody of head sealing awl (14), connect the joint (15) of guide portion and sealing awl; Said sealing awl (14) is positioned at first cavity volume (3); Can form sealing with the sharp limit in pilot valve hole and contact, said guide portion (18) and said pilot valve hole sliding fit have pilot valve gap (16) between said joint (15) and the pilot valve hole; Guide valve seat (5) is provided with the radial direction through hole (17) that is communicated with the pilot valve gap, and valve body (1) is provided with the oil outlet (11) that is communicated with radial direction through hole (17); Be provided with damping spring (2) in said first cavity volume (3); One end of said damping spring is connected with said guide valve core (4); The other end is connected with said valve body (1), in second cavity volume (6) if guide valve core (4) to the shift motion of second cavity volume (6) direction less than the limit stoper of guide valve seat (5) to the sliding stroke of second cavity volume (6) direction, be provided with pressure adjusting spring (7) in the outside of pilot valve; One end of said pressure adjusting spring is connected with guide valve seat (5) contact, and the other end is connected with bonnet (9); The axial area of the interior liquid effects of said first cavity volume (3) on pilot valve is greater than the axial area of (6) liquid effects on pilot valve in second chamber.
2. hydraulic difference dynamic formula guide opening mechanism according to claim 1 is characterized in that said limit stoper is limited post (8), and the one of which end is fixedly connected with bonnet (9), and the other end is to be used for contacting the positive stop end that is connected with guide valve core (4).
3. hydraulic difference dynamic formula guide opening mechanism according to claim 2; It is characterized in that; Said throttle orifice (13) is arranged on the said guide valve core (4); The end face (20) of the positive stop end of said limited post (8) is provided with from the logical oily passage that end face flows into, flow out the side, and said logical oily passage is communicated with said throttle orifice (13) when guide valve core (4) is connected with end face (20) contact of positive stop end.
4. hydraulic difference dynamic formula guide opening mechanism according to claim 2 is characterized in that, the inboard of said bonnet (9) is provided with the endoporus (28) with limited post (8) socket, and said limited post sleeve is in said endoporus (28).
5. hydraulic difference dynamic formula guide opening mechanism according to claim 2; It is characterized in that; Be provided with locking cap (24) in the said bonnet (9); The center of said locking cap is provided with limited post fixed hole (25), and the limited post sleeve is in fixed hole (25), and the inner side surface of the outer side surface of said locking cap (24) and said bonnet (9) is connected.
6. according to each described hydraulic difference dynamic formula guide opening mechanism in the claim 2 to 5, it is characterized in that said guide valve seat (5) is connected with an end sliding fit of limited post (8), guide valve seat (5) constitutes said second cavity volume with limited post (8).
7. according to each described hydraulic difference dynamic formula guide opening mechanism in the claim 1 to 5; It is characterized in that; The outer side surface that said guide valve seat (5) cooperates with the pilot valve cavity wall is provided with first seal groove (22), and said first seal groove is embedded with first seal ring (23).
8. hydraulic difference dynamic formula guide opening mechanism according to claim 6 is characterized in that the side that said limited post (8) matches with guide valve seat (5) is provided with second seal groove (26), and said second seal groove is embedded with second seal ring (27).
9. according to each described hydraulic difference dynamic formula guide opening mechanism in the claim 1 to 5, it is characterized in that, be provided with pressure regulation pad (10) between said pressure adjusting spring (7) and the said bonnet (9).
10. according to each described hydraulic difference dynamic formula guide opening mechanism in the claim 2 to 5; It is characterized in that; Said guide valve seat has seal sleeve (29) near the arranged outside of the sections of second cavity volume (6); The madial wall of said seal sleeve (29) and guide valve seat (5) sliding fit, the two ends of seal sleeve (29) are connected with bonnet (9) contact with valve body (1) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110263821.0A CN102454650B (en) | 2011-09-07 | 2011-09-07 | Hydraulic differential pilot opening mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110263821.0A CN102454650B (en) | 2011-09-07 | 2011-09-07 | Hydraulic differential pilot opening mechanism |
Publications (2)
| Publication Number | Publication Date |
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| CN102454650A true CN102454650A (en) | 2012-05-16 |
| CN102454650B CN102454650B (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110263821.0A Expired - Fee Related CN102454650B (en) | 2011-09-07 | 2011-09-07 | Hydraulic differential pilot opening mechanism |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103982481A (en) * | 2014-05-29 | 2014-08-13 | 徐州徐工液压件有限公司 | Hydraulic system and throttle valve |
| CN104653538A (en) * | 2015-02-06 | 2015-05-27 | 东西方(宁海)航空科技发展有限公司 | Stress-free valve structure |
| CN106402394A (en) * | 2016-10-12 | 2017-02-15 | 北京理工大学 | Sealing device used for micro rotor engine |
| CN108843638A (en) * | 2017-05-19 | 2018-11-20 | 赵荣凯 | A kind of embedded double spool Dao Kong mechanism and control valve for fluids |
| CN111911381A (en) * | 2020-07-26 | 2020-11-10 | 中国航发贵州红林航空动力控制科技有限公司 | Nozzle differential pressure valve mechanism with damping piston |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103982481A (en) * | 2014-05-29 | 2014-08-13 | 徐州徐工液压件有限公司 | Hydraulic system and throttle valve |
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| CN106402394A (en) * | 2016-10-12 | 2017-02-15 | 北京理工大学 | Sealing device used for micro rotor engine |
| CN106402394B (en) * | 2016-10-12 | 2018-01-30 | 北京理工大学 | A kind of sealing device for miniature rotor engine |
| CN108843638A (en) * | 2017-05-19 | 2018-11-20 | 赵荣凯 | A kind of embedded double spool Dao Kong mechanism and control valve for fluids |
| CN108843638B (en) * | 2017-05-19 | 2020-07-03 | 赵荣凯 | Embedded double-valve-core guide control mechanism and fluid control valve |
| CN111911381A (en) * | 2020-07-26 | 2020-11-10 | 中国航发贵州红林航空动力控制科技有限公司 | Nozzle differential pressure valve mechanism with damping piston |
| CN111911381B (en) * | 2020-07-26 | 2022-12-06 | 中国航发贵州红林航空动力控制科技有限公司 | Nozzle differential pressure valve mechanism with damping piston |
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| CN102454650B (en) | 2014-07-23 |
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