CN101324292B - Pressure automatic filling type low noise throttling valve - Google Patents
Pressure automatic filling type low noise throttling valve Download PDFInfo
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- CN101324292B CN101324292B CN2008100631944A CN200810063194A CN101324292B CN 101324292 B CN101324292 B CN 101324292B CN 2008100631944 A CN2008100631944 A CN 2008100631944A CN 200810063194 A CN200810063194 A CN 200810063194A CN 101324292 B CN101324292 B CN 101324292B
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Abstract
The invention discloses a pressure automatic filling type throttle valve with low noise. Cavitation is easy to occur in the throttling position when an ordinary throttle valve operates, and is attached to the wall surface of the ordinary throttling valve. In the pressure automatic filling type throttle valve, pressure filling holes are formed on the wall surface of the throttle valve of the invention and connected with an external oil source through a one-way valve; after cavitation occurs, filling power is generated between the local low pressure of the cavitation and the external oil source; oil liquid is filled into a cavitation space through the pressure filling holes, thereby effectively eliminating the cavitation, improving the local low pressure, and further inhibiting the reoccurrence of the cavitation. The throttle valve eliminates the noise, the vibration, the corrosion, etc. brought by the cavitation. The throttle valve has a structure of circumferential openings and non-circumferential openings and arc-shaped and step-shaped transitions are formed between a valve plug shaft and the throttling position of the valve plug. After the cavitation occurs, the pressure is extremely low, and forms the packing pressure with the external low pressure oil source; the packing pressure is self-adaptively filled in the cavitation space, thereby reducing the noise and the vibration of a throttling system and improving the flow control characteristics of the throttling system. The filled liquid oil has a single flow direction, and the low pressure oil source has high control precision, thus ensuring the original flow state of the system.
Description
Technical field
The present invention relates to throttle valve, especially relate to a kind of pressure automatic filling type low noise throttling valve.
Background technique
Throttle valve is a kind of basic hydrovalve form, in order to the movement velocity and the direction of control executing mechanism, adds various operation control modes such as manual, ratio, electro-hydraulic servo etc., and its application is very extensive.The branch that complete all openings and non-complete all openings are arranged again from structure.Throttle structure is various informative, control characteristic respectively has characteristics, but generally all has comparatively narrow and small and complicated flow passage structure, and flow velocity is higher, cavitation is difficult to avoid, and brings a large amount of noises and vibration problem, and air pocket stops up after the runner, to make flow system flow saturated, thereby make flow system flow uncontrollable.Weakening or eliminating air pocket is the key that addresses the above problem.There was the working pressure control that distributes to suppress the example of air pocket, the method for generally taking high pressure oil to inject in the research of sliding valve structure such as cone valve to the air pocket generation area in the past.The air pocket development degree changes with pressure parameter, and general pressure method for implanting can not well adapt to the characteristics of the different development degree of air pocket, underpressure, suppress poor effect, pressure is excessive, and local compression raises, and destroys original system flow and control characteristic.Because the restriction of research means is difficult to obtain accurate and concrete air pocket distribution situation.The pressure injection phase is improper, as improving the air pocket regional local compression of crumbling and fall, although air pocket is rapidly disappeared, can cause bigger Cavitation Noise.The present invention has furtherd investigate cavitation in the throttle valve by the high-speed camera technology.Discover, air pocket along valve body throttling edge or throttling spool position nascent after, forms stable growth district, growing the district is an independently gaseous space, has tangible boundary layer with liquid, and stable attached on the wall of coming into being.As the same balloon that is immersed in the liquid, and the opening of balloon is by spool or valve body wall face seal.On the basis of clear and concrete understanding throttling groove air pocket distribution situation, produce principle in conjunction with air pocket, the air pocket sounding principle that crumbles and fall can have more targetedly the throttle valve structure is innovated, and suppresses air pocket, reduces noise and vibration.
Summary of the invention
The object of the present invention is to provide a kind of pressure automatic filling type low noise throttling valve.
In order to achieve the above object, the technical solution used in the present invention is:
Technological scheme one:
Comprise valve body and spool, between valve body and the spool valve pocket is housed; The valve pocket outer wall has circular groove, and valve body has through hole, and the through hole of valve body and the circular groove of valve pocket constitute valve body valve pocket inner flow passage; The inner oil suction chamber of valve pocket and go out to have and be the valve pocket boss between the chamber, valve pocket boss throttling edge is along circumferentially offering valve pocket pressure filling hole, all adjacent valve cover pressure filling hole axis angles equate, the relative valve body valve pocket of the valve pocket boss edge one end inner flow passage one end axial position of valve pocket pressure filling hole is partial to out oil pocket, cover pressure filling hole distributes more than one group vertically, valve pocket pressure filling hole is communicated with valve body valve pocket inner flow passage, links to each other with one-way valve by flexible pipe; Extraneous low pressure oil sources links to each other with one-way valve by flexible pipe.
Described spool is the throttle valve structure of complete all openings or non-complete all openings; Be arc-shaped transition between the spool shaft shoulder and the throttling spool position.
Described circumferential adjacent valve cover pressure filling hole axis angle is 5～10 °, valve pocket pressure filling hole axis and valve core axis's angle are 60～75 °, the inwall intersection point of valve pocket pressure filling hole axis and valve pocket boss and valve pocket boss throttling Edge Distance are 0.2～0.5mm, valve pocket pressure filling hole diameter 0.3～0.5mm.
Described low pressure oil sources pressure range 0.01～0.02Mpa, lasting accuracy ± 0.001Mpa; One-way valve controlling liquid flow direction for the low pressure oil sources to valve pocket pressure filling hole, logical oil pressure 0.008Mpa.
Technological scheme two:
Comprise valve body and spool, it is characterized in that: between valve body and the spool valve pocket is housed; The valve pocket outer wall has circular groove, and valve body has through hole, and the through hole of valve body and the circular groove of valve pocket constitute valve body valve pocket inner flow passage; The inner oil suction chamber of valve pocket and go out to have and be the valve pocket boss between the chamber; Valve pocket boss throttling edge is along circumferentially offering valve pocket pressure filling hole, all adjacent valve cover pressure filling hole axis angles equate, the relative valve body valve pocket of the valve pocket boss edge one end inner flow passage one end axial position of valve pocket pressure filling hole is partial to out oil pocket, valve pocket pressure filling hole distributes more than one group vertically, valve pocket pressure filling hole is communicated with valve body valve pocket inner flow passage, links to each other with one-way valve by flexible pipe; The valve core inside runner is offered in spool oil suction chamber one end inside; The throttling spool position is along circumferentially offering spool pressure filling hole, adjacent spool pressure filling hole axis angle equates, the valve core inside runner one end axial position of the relative spool pressure of the throttling spool position one end filling hole of spool pressure filling hole is partial to out oil pocket, spool pressure filling hole distributes more than two groups vertically, spool pressure filling hole is communicated with the valve core inside runner, links to each other with one-way valve by flexible pipe; Extraneous low pressure oil sources links to each other with one-way valve by flexible pipe.
Described spool is the throttle valve structure of complete all openings, non-complete all openings; Be the stepped shaft transition between the spool shaft shoulder and the throttling spool position.
Described adjacent valve cover pressure filling hole axis angle is 5～10 °, and valve pocket pressure filling hole axis and valve core axis's angle are 60～75 °, and the inwall intersection point of valve pocket pressure filling hole axis and valve pocket boss and valve pocket boss throttling Edge Distance are 0.2～0.5mm; Adjacent spool pressure filling hole axis angle is 2～6 ° on the same circumference of spool, spool pressure filling hole axis and valve core axis's angle are 30～45 °, the intersection point of spool pressure filling hole axis and spool outer wall and spool shaft shoulder distance are 0.2～0.5mm, distance equates between the axial adjacent spool pressure filling hole, is 0.2～0.5mm; Spool, valve pocket pressure filling hole diameter is 0.3～0.5mm.
Described oil supply pressure excursion 0.01～0.02Mpa, lasting accuracy ± 0.001Mpa; One-way valve 13 controlling liquid flow directions for the low pressure oil sources to spool, valve pocket pressure filling hole, logical oil pressure 0.008Mpa.
The useful effect that the present invention has is:
The wall that growth is distinguished according to air pocket adheres to characteristics and independently there is characteristic in growth district gaseous space, offers spool and valve body pressure filling hole in gaseous space; After utilizing air pocket to produce, the extremely low characteristics of pressure own form filling power with extraneous low pressure oil sources, automatic jet, and self adaption is filled the air pocket space, improves throttle system noise and vibration and metering characteristics.Filling liquid oil flow direction is single, the low but control accuracy height of low pressure oil supply pressure absolute value, the original flowing state of assurance system.
Description of drawings
Fig. 1 is the throttle valve general structure schematic representation that spool axial cross section of the present invention is an arc-shaped transition.
Fig. 2 is the A-A view of Fig. 1.
Fig. 3 is the B-B view of Fig. 1.
Fig. 4 is the local working principle schematic representation that amplifies of spool axial cross section arc-shaped transition throttle valve E of the present invention.
Fig. 5 is the throttle valve general structure schematic representation that spool axial cross section of the present invention is the stepped shaft transition.
Fig. 6 is A '-A ' view of Fig. 5.
Fig. 7 is the C-C view of Fig. 5.
Fig. 8 is B '-B ' view of Fig. 5.
Fig. 9 is the local working principle schematic representation that amplifies of spool axial cross section stepped shaft transition throttle valve E ' of the present invention.
Among the figure: 1. valve body, 2,2 '. spool, 3. valve pocket, 4. filler opening, 5. oil outlet, 6. oil suction chamber, 7. go out oil pocket, 8. valve body valve pocket inner flow passage, 9. valve core inside runner, 10. valve body oil connection, 11. the spool oil connection, 12. fastening screw trip bolts, 13. one-way valves, 14. low pressure oil sources, 15. spool pressure filling hole, 16. valve pocket pressure filling holes, 17. throttling grooves, 18. the air pocket that produces along the throttling spool position, the wake flow 19. the air pocket that produces along valve pocket boss edge, 20. air pockets are crumbled and fall, 21. valve pocket boss throttling edges, 22. flexible pipe, 23. the valve pocket boss, the 24. spool shaft shoulders, 25. throttling spool positions, 26. valve pocket pressure filling hole evenly distributes along circumference, 27. spool pressure filling holes evenly distribute along circumference.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Noise and vibration are common phenomena in the hydraulic system, and the stability of system works and reliability and component life are brought very big harm, and the high-frequency noise that air pocket a produces overall situation especially pollutes.Be difficult to thoroughly eliminate the problem that air pocket brings with regard to present throttle valve structure.On the basis that guarantees the hydraulic system operating characteristics, the generation of the inhibition air pocket of trying one's best is a problem of needing solution badly.According to known air pocket nascent and air pocket sounding principle as can be known, when the liquid local compression is lower than that air separation is pressed or during saturation vapour pressure, gas will be separated out, and form bubble or flow of bubble, promptly produce air pocket from liquid.Air pocket develops into high pressure place, downstream and crumbles and fall, and brings out high-frequency noise and vibration, and the impact energy that the while bubble is crumbled and fall and brought very easily makes metal produce corrosion.Knot
Close the throttle valve air pocket wall that experimental research obtains and stablize adhesion condition, and grow characteristics such as distinguishing independently gaseous space, and offer the pressure filling hole at the air pocket place of adhering to, the pressure filling hole links to each other with extraneous flexible pipe by inner flow passage, and the connection one-way valve, link to each other with the low pressure oil sources again.Air pocket is in case produce, according to the nascent principle of air pocket, gaseous space will form utmost point low-pressure, transient pressure even be " negative pressure ", the air pocket low pressure area is by the pressure filling hole, and flexible pipe links to each other with extraneous low pressure oil sources with one-way valve, form oil circuit, under differential pressure action, extraneous liquid oil is filled the air pocket space automatically, thereby has eliminated air pocket to a certain extent.Simultaneously, the filling of liquid oil is raised original area of low pressure pressure, no longer satisfies the nascent condition of air pocket, and then has suppressed the regeneration of air pocket.Air pocket development Shaoxing opera is strong, and air pocket is grown Qu Yueda, and the cavity force value is low more, and liquid oil is filled the corresponding increase of power; Vice versa.This shows that the different filling liquid oil masses of adjusting automatically of the with good grounds air pocket development degree of the automatic interstitital texture energy of pressure pressure can not occur and inject deficiency or too high phenomenon, are adaptive processes.Simultaneously, in order not destroy original flowing property in the runner, as flow, nowed forming etc., quantity, size, filling angle and the distribution of having stipulated the pressure filling hole.The use of one-way valve can guarantee not have under the air pocket situation liquid oil and can outwards not flow out from the pressure filling hole, and the use that adds the low pressure oil sources can guarantee that pressure fills unidirectionally, steadily, when suppressing air pocket, guarantees original flowing state.Dielectric viscosity hour is difficult for forming stable air pocket and grows the district, so stipulated the range of viscosities of working medium.
As shown in Figure 1, be a kind of pressure automatic filling type low noise throttling valve of the present invention, comprise valve body 1 and spool 2.Valve pocket 3 (as shown in Figure 2) is housed between valve body 1 and the spool 2, uses fastening screw trip bolt 12 fixing; Valve pocket 3 outer walls have circular groove, and valve body 1 outer wall is offered through hole to circular groove, and the circular groove of the through hole of valve body 1 and valve pocket 3 constitutes valve body valve pocket inner flow passage 8; Valve pocket 3 inner oil suction chambers 6 and go out to have between the chamber 7 to be valve pocket boss 23 form throttlings with spool 2 throttling grooves 17 and cooperate; Valve pocket boss throttling edge 21 is along circumferentially offering 30 with upper valve sleeve pressure filling hole 16 (as shown in Figure 3), all adjacent valve cover pressure filling hole 16 axis angles equate, valve pocket pressure filling hole evenly distributes 26 along circumference, the relative valve body valve pocket of the valve pocket boss edge 21 1 ends inner flow passage 8 one end axial positions of valve pocket pressure filling hole 16 are partial to out oil pocket 7, valve pocket pressure filling hole 16 distributes one group above (as shown in Figure 4) vertically, valve pocket pressure filling hole 16 is communicated with valve body valve pocket inner flow passage 8, links to each other with one-way valve 13 by flexible pipe 22; Extraneous low pressure oil sources 14 links to each other with one-way valve 13 by flexible pipe 22.The throttle valve structure that described spool 2 is complete all openings or non-complete all openings; Between the spool shaft shoulder 24 and the throttling spool position 25 is arc-shaped transition, (goes out oil pocket one end) after the transition zone, and bottom, throttling position can be the shape of camber line, straight line or both combinations.
Described circumferential adjacent valve cover pressure filling hole 16 axis angles are 5～10 °, valve pocket pressure filling hole 16 axis and spool 2 axis angles are 60～75 °, the inwall intersection point of valve pocket pressure filling hole 16 axis and valve pocket boss 23 and valve pocket boss throttling edge 21 distances are 0.2～0.5mm, valve pocket pressure filling hole 16 diameters 0.3～0.5mm.
Described low pressure oil sources 14 pressure ranges 0.01～0.02Mpa, lasting accuracy ± 0.001Mpa; One-way valve 13 controlling liquid flow directions are that low pressure oil sources 14 arrives valve pocket pressure filling hole 16, logical oil pressure 0.008Mpa.
As shown in Figure 5, be another kind of pressure automatic filling type low noise throttling valve of the present invention, comprise valve body 1 and spool 2.Valve pocket 3 (as shown in Figure 6) is housed between valve body 1 and the spool 2, uses fastening screw trip bolt 12 fixing; Valve pocket 3 outer walls have circular groove, and valve body 1 has through hole, and the circular groove of the through hole of valve body 1 and valve pocket 3 constitutes valve body valve pocket inner flow passage 8; Valve pocket 3 inner oil suction chambers 6 and go out to have between the chamber 7 to be valve pocket boss 23; Valve pocket boss throttling edge 21 is along circumferentially offering 30 with upper valve sleeve pressure filling hole 16, all adjacent valve cover pressure filling hole 16 axis angles equate, valve pocket pressure filling hole evenly distributed for 26 (as shown in Figure 8) along circumference, the relative valve body valve pocket of the valve pocket boss edge 21 1 ends inner flow passage 8 one end axial positions of valve pocket pressure filling hole 16 are partial to out oil pocket 7, valve pocket pressure filling hole 16 distributes more than one group vertically, valve pocket pressure filling hole 16 is communicated with valve body valve pocket inner flow passage 8, links to each other with one-way valve 13 by flexible pipe 22; Valve core inside runner 9 is offered in spool 2 ' oil suction chamber 6 one end inside; Spool 2 ' throttling position 25 is along circumferentially offering spool pressure filling hole 15, adjacent spool pressure filling hole 15 axis angles equate, spool pressure filling hole evenly distributed for 27 (as shown in Figure 7) along circumference, 25 1 ends relative valve core inside runner 9 one end axial positions in spool pressure filling hole 15 throttling spool positions are partial to out oil pocket 7, spool pressure filling hole 15 distributes more than two groups vertically, spool pressure filling hole 15 is communicated with valve core inside runner 9, links to each other with one-way valve 13 by flexible pipe 22; Extraneous low pressure oil sources 14 links to each other with one-way valve 13 by flexible pipe 22.
Described spool 2 ' is the throttle valve structure of complete all openings, non-complete all openings; Between the spool shaft shoulder 24 and the throttling spool position 25 is the stepped shaft transition, (goes out oil pocket one end) after the transition zone, and bottom, throttling position can be the shape of camber line, straight line or both combinations.
Described adjacent valve cover pressure filling hole 16 axis angles are 5～10 °, valve pocket pressure filling hole 16 axis and spool 2 ' axis angle are 60～75 °, and the inwall intersection point of valve pocket pressure filling hole 16 axis and valve pocket boss 23 and valve pocket boss throttling edge 21 distances are 0.2～0.5mm; Adjacent spool pressure filling hole 15 axis angles are 2～6 ° on spool 2 ' the same circumference, spool pressure filling hole 15 axis and spool 2 ' axis angle are 30～45 °, the intersection point of spool pressure filling hole 15 axis and spool 2 ' outer wall and the spool shaft shoulder 24 distances are 0.2～0.5mm, distance equates between the axial adjacent spool pressure filling hole 15, is 0.2～0.5mm; Spool pressure filling hole 15 and valve pocket pressure filling hole 16 diameters are 0.3～0.5mm.
Described oil sources 14 pressure ranges 0.01～0.02Mpa, lasting accuracy ± 0.001Mpa; One-way valve 13 controlling liquid flow directions are that low pressure oil sources 14 arrives spool pressure filling hole 15 and valve pocket pressure filling hole 16, logical oil pressure 0.008Mpa.
Two kinds of described working mediums of structure are the liquid with certain viscosity, and general viscosity is greater than 1.5 * 10
- 5m
2/ s.
Above-mentioned pressure automatic filling type low noise throttling valve working procedure is as follows:
As shown in Figure 1, hydraulic oil enters oil suction chamber 6 by filler opening 4, carries out throttling work under the effect of throttling groove 17, and then flows into out oil pocket 7, finally flows out from oil outlet 5; Owing to reasons such as throttling groove 17 narrow space, runner complexity and flow rate of liquid are very fast, produce air pockets at throttling groove 17.The research situation shows, for the axial cross section between the spool shaft shoulder 24 and the throttling spool position 25 is the throttle valve (as Fig. 4) of arc-shaped transition, the air pocket 19 that formation produces along valve pocket boss edge, form the air pocket wake flow 20 of crumbling and fall at the air pocket afterbody, flow to spool 2 walls, crumble and fall, produce Cavitation Noise and vibration; And be the throttle valve of stepped shaft transition for the axial cross section between the spool shaft shoulder 24 and the throttling spool position 25, aperture hour forms the air pocket 18 that produces along the throttling spool position, when aperture is big, forms the air pocket 19 that produces along valve pocket boss edge.With the nascent location independent of air pocket, all can form stable growth district after two kinds of air pockets are nascent, and attached to the wall at valve body boss throttling edge 21 or throttling spool position 25, as the same balloon that is immersed in the liquid, and the opening of balloon is by wall sealing (Fig. 4 and Fig. 9).According to this kind situation, offer valve pocket pressure filling hole 16 and spool pressure filling hole 15 at the wall at valve body boss throttling edge 21 or throttling spool position 25, communicate with the inner low-voltage space of air pocket; Simultaneously, filling 16 of valve pocket pressure and spool pressure filling hole 15 are communicated with valve body valve pocket inner flow passage 8 and valve core inside runner 9 separately, again by valve body oil connection 10, spool oil connection 11 and flexible pipe 22 connect one-way valve 13, one-way valve 13 links to each other with low pressure oil sources 14 by flexible pipe 22 again, has so just constituted low pressure oil sources 14 and has arrived one-way valve 13 arrives the air pocket low-voltage space again to valve body, spool pressure filling hole unidirectional oil circuit; According to the pressure condition setting one-way valve 13 logical oil pressures that air pocket in the fluid produces, the adaptation air pocket development degree of energy had been set the pressure absolute value of low pressure oil sources and the precision that fluctuates when the while filled in order to guarantee that liquid is oily.In case air pocket produces, air pocket low-voltage space " negative pressure " when producing and the pressure reduction between the low pressure oil sources according to air pocket, form fluid and fill up power, and then fluid enters the air pocket space from valve body, spool pressure filling hole, existing air pocket is eliminated and weakens, improve local pressure conditions simultaneously, suppressed air pocket regeneration.And then problems such as the high-frequency noise that air pocket brings, vibration and corrosion have been eliminated.
Claims (8)
1. a pressure automatic filling type low noise throttling valve comprises valve body (1) and spool (2), it is characterized in that: between valve body (1) and the spool (2) valve pocket (3) is housed; Valve pocket (3) outer wall has circular groove, and valve body (1) has through hole, and the circular groove of the through hole of valve body (1) and valve pocket (3) constitutes valve body valve pocket inner flow passage (8); The inner oil suction chamber of valve pocket (3) (6) and go out between the oil pocket (7) to be valve pocket boss (23), valve pocket boss (23) is gone up near valve pocket boss throttling edge (21) and is located along circumferentially offering valve pocket pressure filling hole (16), the inwall intersection point of valve pocket pressure filling hole (16) axis and valve pocket boss (23) and valve pocket boss throttling edge (21) distance are 0.2～0.5mm, all circumferential adjacent valve cover pressure filling hole (16) axis angles equate, one end axial position of the connection valve body valve pocket inner flow passage (8) of the relative valve pocket pressure of the one end filling hole (16) at the close valve pocket boss throttling edge (21) of valve pocket pressure filling hole (16) is partial to out oil pocket (7), valve pocket pressure filling hole (16) distributes more than one group vertically, valve pocket pressure filling hole (16) is communicated with the inwall of valve body valve pocket inner flow passage (8) and valve pocket boss (23), links to each other with one-way valve (13) by flexible pipe (22); Extraneous low pressure oil sources (14) links to each other with one-way valve (13) by flexible pipe (22).
2. a kind of pressure automatic filling type low noise throttling valve according to claim 1 is characterized in that: described spool (2) is the throttle valve structure of complete all openings or non-complete all openings; Between the spool shaft shoulder (24) and throttling spool position (25) is arc-shaped transition.
3. a kind of pressure automatic filling type low noise throttling valve according to claim 1, it is characterized in that: described circumferential adjacent valve cover pressure filling hole (16) axis angle is 5～10 °, valve pocket pressure filling hole (16) axis and spool (2) axis angle are 60～75 °, valve pocket pressure filling hole (16) diameter 0.3～0.5mm.
4. a kind of pressure automatic filling type low noise throttling valve according to claim 1 is characterized in that: described low pressure oil sources (14) pressure range 0.01～0.02Mpa, lasting accuracy ± 0.001Mpa; One-way valve (13) controlling liquid flow direction is that low pressure oil sources (14) arrives valve pocket pressure filling hole (16), logical oil pressure 0.008Mpa.
5. a pressure automatic filling type low noise throttling valve comprises valve body (1) and spool (2), it is characterized in that: between valve body (1) and the spool (2) valve pocket (3) is housed; Valve pocket (3) outer wall has circular groove, and valve body (1) has through hole, and the circular groove of the through hole of valve body (1) and valve pocket (3) constitutes valve body valve pocket inner flow passage (8); The inner oil suction chamber of valve pocket (3) (6) and go out between the oil pocket (7) to be valve pocket boss (23), valve pocket boss (23) is gone up near valve pocket boss throttling edge (21) and is located along circumferentially offering valve pocket pressure filling hole (16), the inwall intersection point of valve pocket pressure filling hole (16) axis and valve pocket boss (23) and valve pocket boss throttling edge (21) distance are 0.2～0.5mm, all circumferential adjacent valve cover pressure filling hole (16) axis angles equate, one end axial position of the connection valve body valve pocket inner flow passage (8) of the relative valve pocket pressure of the one end filling hole (16) at the close valve pocket boss throttling edge (21) of valve pocket pressure filling hole (16) is partial to out oil pocket (7), valve pocket pressure filling hole (16) distributes more than one group vertically, valve pocket pressure filling hole (16) is communicated with the inwall of valve body valve pocket inner flow passage (8) and valve pocket boss (23), link to each other with one-way valve (13) by flexible pipe (22), valve core inside runner (9) is offered in spool (2 ') oil suction chamber (6) one end inside; Throttling spool position (25) is along circumferentially offering spool pressure filling hole (15), circumferential adjacent spool pressure filling hole (15) axis angle equates, connection valve core inside runner (9) the one end axial positions of close throttling spool position (25) the one ends relative spool pressure filling holes (15) of spool pressure filling hole (15) are partial to out oil pocket (7), spool pressure filling hole (15) distributes more than two groups vertically, spool pressure filling hole (15) is communicated with valve core inside runner (9), links to each other with one-way valve (13) by flexible pipe (22); Extraneous low pressure oil sources (14) links to each other with one-way valve (13) by flexible pipe (22).
6. a kind of pressure automatic filling type low noise throttling valve according to claim 5 is characterized in that: described spool (2 ') is the throttle valve structure of complete all openings, non-complete all openings; Between the spool shaft shoulder (24) and throttling spool position (25) is the stepped shaft transition.
7. a kind of pressure automatic filling type low noise throttling valve according to claim 5, it is characterized in that: described circumferential adjacent valve cover pressure filling hole (16) axis angle is 5～10 °, valve pocket pressure filling hole (16) axis and spool (2 ') axis angle are 60～75 °, adjacent spool pressure filling hole (15) axis angle is 2～6 ° on the same circumference of spool (2 '), spool pressure filling hole (15) axis and spool (2 ') axis angle are 30～45 °, the intersection point of spool pressure filling hole (15) axis and spool (2 ') outer wall and the spool shaft shoulder (24) distance are 0.2～0.5mm, distance equates between the axial adjacent spool pressure filling hole (15), is 0.2～0.5mm; The diameter of spool pressure filling hole (15) and valve pocket pressure filling hole (16) is 0.3～0.5mm.
8. a kind of pressure automatic filling type low noise throttling valve according to claim 5 is characterized in that: described oil sources (14) pressure range 0.01～0.02Mpa, lasting accuracy ± 0.001Mpa; One-way valve (13) controlling liquid flow direction is that low pressure oil sources (14) arrives spool pressure filling hole (15) and valve pocket pressure filling hole (16), logical oil pressure 0.008Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100631944A CN101324292B (en) | 2008-07-22 | 2008-07-22 | Pressure automatic filling type low noise throttling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100631944A CN101324292B (en) | 2008-07-22 | 2008-07-22 | Pressure automatic filling type low noise throttling valve |
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| Publication Number | Publication Date |
|---|---|
| CN101324292A CN101324292A (en) | 2008-12-17 |
| CN101324292B true CN101324292B (en) | 2010-06-02 |
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| CN2008100631944A Expired - Fee Related CN101324292B (en) | 2008-07-22 | 2008-07-22 | Pressure automatic filling type low noise throttling valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107725826B (en) * | 2017-11-01 | 2024-05-31 | 联合汽车电子有限公司 | Valve assembly and electromagnetic valve |
| CN108980423B (en) * | 2018-07-16 | 2019-09-03 | 马楠峰 | No electric automatic valve and the water purifier for using the valve |
| CN113175454B (en) * | 2021-04-20 | 2023-05-02 | 杭州励贝电液科技有限公司 | High-frequency response servo proportional valve |
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| SU1214970A1 (en) * | 1984-04-29 | 1986-02-28 | Предприятие П/Я Р-6654 | Low-noise regulated throttle |
| SU1486695A1 (en) * | 1987-07-09 | 1989-06-15 | Vni Pk I Atomnogo Energet Mash | Throttle |
| CN2639589Y (en) * | 2003-09-12 | 2004-09-08 | 浙江大学 | Low noise direction throttle valve for controlling flow field pressure distribution |
| CN1664380A (en) * | 2005-03-17 | 2005-09-07 | 浙江大学 | Flow-blocking supercharging throttle valve using a dummy club |
| CN2729386Y (en) * | 2004-08-04 | 2005-09-28 | 浙江大学 | Guide water hydraulic relief valve |
-
2008
- 2008-07-22 CN CN2008100631944A patent/CN101324292B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1214970A1 (en) * | 1984-04-29 | 1986-02-28 | Предприятие П/Я Р-6654 | Low-noise regulated throttle |
| SU1486695A1 (en) * | 1987-07-09 | 1989-06-15 | Vni Pk I Atomnogo Energet Mash | Throttle |
| CN2639589Y (en) * | 2003-09-12 | 2004-09-08 | 浙江大学 | Low noise direction throttle valve for controlling flow field pressure distribution |
| CN2729386Y (en) * | 2004-08-04 | 2005-09-28 | 浙江大学 | Guide water hydraulic relief valve |
| CN1664380A (en) * | 2005-03-17 | 2005-09-07 | 浙江大学 | Flow-blocking supercharging throttle valve using a dummy club |
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| CN101324292A (en) | 2008-12-17 |
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