CN100564966C - Rotating regulation type throttling valve - Google Patents
Rotating regulation type throttling valve Download PDFInfo
- Publication number
- CN100564966C CN100564966C CNB2008100598791A CN200810059879A CN100564966C CN 100564966 C CN100564966 C CN 100564966C CN B2008100598791 A CNB2008100598791 A CN B2008100598791A CN 200810059879 A CN200810059879 A CN 200810059879A CN 100564966 C CN100564966 C CN 100564966C
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- throttling
- spool
- throttling groove
- groove
- valve body
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Abstract
The invention discloses a kind of rotating regulation type throttling valve.Comprise valve body and spool; The spool convex shoulder waits the central angle throttling groove more than 1 group that distributes every 1/4 circle; Along circumference normal direction projection, the valve body boss is along the circumferential direction every throttling limit that 1/4 circle distribution straightway and two minor faces of isosceles triangle join, rotary spool, the throttling groove priority on the spool convex shoulder cooperates with throttling limit linear edge and two minor faces of triangle on the valve body boss.In the valve core rotation process, variation along with the spool angle of swing, the relative axial position of throttling limit and throttling groove changes, throttling groove aperture experience reduces again to increasing gradually gradually from closed condition, the cycle of getting back to closed condition at last changes, and then realizes the control of throttling groove working quantity and aperture size.That the present invention has is simple in structure, good manufacturability, simple operation and other advantages, reduces the noise of directional throttle valve and throttling groove hydraulic control device.
Description
Technical field
The present invention relates to throttle valve, relate in particular to a kind of rotating regulation type 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.Throttling groove is the valve port principal mode of this class valve arrangement, symmetry is offered the throttling groove of some difformities, size on spool convex shoulder circumference, constitute the can regulate valve port, the at present employing moves axially spool and adjusts the method for throttle opening size and realize control to flow more.The setting of throttling groove depends primarily on spool travel Flow characteristics (promptly satisfying the load movement speed controlling requires), generally believes that shape, size, the valve core structure of throttling groove has very big influence to the noise of valve.
Mobile showing as in the throttling groove, the hydrodynamic pressure of locating near the throttling limit significantly descend, pressure rising recovery gradually more thereafter.The force value that is lower than the hold-up vapor tension can cause separating out of bubble in the liquid, and along with flow of fluid, crumbles and fall in the zone of high pressure and then sends very big noise.The air pocket sounding is a noise source main in the hydraulic system.There are confidential relation in its sounding magnitude and air pocket nowed forming.
Summary of the invention
The object of the present invention is to provide a kind of rotating regulation type throttling valve, is the throttle valve by rotary spool control throttling groove working quantity and aperture.
In order to achieve the above object, the technical solution adopted in the present invention is:
Comprise valve body and spool; The spool convex shoulder waits the central angle throttling groove more than 1 group that distributes every 1/4 circle; Along circumference normal direction projection, the valve body boss is along the circumferential direction every throttling limit that 1/4 circle distribution straightway and two minor faces of isosceles triangle join, rotary spool, the throttling groove priority on the spool convex shoulder cooperates with throttling limit linear edge and two minor faces of triangle on the valve body boss.
Described throttling groove actual sets number is by spool radius and the decision of throttling groove width.
Described throttling groove start-up portion is the semi-circle section, and the extension is for being the rectangular surfaces of width with the arc diameter, and rectangular surfaces length is 2～3 times arc diameter.
The throttling triangle edge summit on the described valve body boss and the distance on base are more than or equal to throttling groove circular arc cross sectional radius.
The present invention finds that by the relation of air pocket sound generating mechanism in the research throttling groove and air pocket flowing state start-up portion is in the throttling groove of circular arc, and there are two kinds of nowed formings that discrimination is bigger in air pocket stream.When throttle opening value during less than radius of arc, air pocket stream is grown along circular arc at bottom land, and along with the flow-drawing of liquid, change procedure is milder, and the noise magnitude is lower.Opening value greater than radius of arc after, the nascent position of air pocket changes, transferring to the crossing throttling limit of valve body boss and throttling groove goes out, air pocket stream form is also along with change, produce violent spirality twisting, the wall that part bubble intersects in gas-liquid takes place to break in advance, has increased noise source, and the noise magnitude obviously improves.Be benchmark promptly, have the Cavitation Noise of two kinds of big grade differentials with the radius aperture.A large amount of experimental results prove, aperture is bigger more than 15 decibels during less than radius than aperture greater than the Cavitation Noise magnitude of radius of arc.
Increase the throttling groove quantity on the spool convex shoulder, its working quantity changes along with the rotation of spool, and the aperture of the throttling groove of working simultaneously also changes along with valve core rotation, can realize interior in a big way Flow-rate adjustment, guarantee the precision of adjusting simultaneously, satisfy the requirement of common engineering Flow characteristics.Because maximum opening is no more than the arc groove radius, noise level is lower, so this structure has reasonable noise reduction.
By the relation of research air pocket form and Flow characteristics, the throttling groove of discovery circular arc can reduce between the saturated pressure area of flow, promptly to flow is saturated certain inhibitory action is arranged.
The curve shape that described valve body boss throttling limit formation straightway and isosceles triangle minor face join, the variation of working quantity and aperture in the formation spool rotary course; The distance on summit, triangle throttling limit and base is no more than the initial radius of arc of throttling groove more than or equal to the initial radius of arc of throttling groove with the maximum opening that guarantees all working throttling groove.
Described throttling groove is a half-arc groove, and its radius is less than or equal to the axial distance difference at boss edge.It is wide rectangle groove that the later throttling groove of start-up portion is shaped as with arc diameter, and length generally doubles the semi-circle diameter, and certain back pressure value can effectively be provided in oil back chamber, guarantees the mild form of air pocket of growing at the bottom of arc groove.
The useful effect that the present invention has is:
Valve body boss throttling limit is the curve (along circumference normal direction observation) that straightway and isosceles triangle minor face join, in the valve core rotation process, throttling groove aperture experience reduces again to increasing gradually gradually from closed condition, the cycle of getting back to closed condition at last changes, and then realizes the control of throttling groove working quantity and aperture size.The distance on triangular apex and base is more than or equal to the initial radius of arc of throttling groove, guarantee all working throttling groove aperture at radius of arc with interior variation; The rectangle extension of throttling groove can guarantee the certain back pressure of circular arc-shaped bottom portion air pocket wake flow, stablizes the mild form of air pocket, guarantees low noise rank.
That the present invention has is simple in structure, good manufacturability, simple operation and other advantages, reduces the noise of directional throttle valve and throttling groove hydraulic control device.
Description of drawings
Fig. 1 is spool of the present invention and valve body assembling section.
Fig. 2 is a spool working state sectional view of the present invention.
Fig. 3 is a throttling groove different operating view of the present invention.
Fig. 4 is a throttling working procedure schematic representation of the present invention.
Among the figure: 1. valve body, 2. spool, 3. valve body boss, 4. throttling groove, 5. throttling groove semi-circle part, 6. throttling groove rectangle extension, 7. oil back chamber, 8. oil suction chamber, 9. throttling limit, 10 throttling grooves close closed region, the adjustable zone of 11 throttling groove apertures.
Embodiment
As depicted in figs. 1 and 2, the present invention includes valve body and spool.Spool 2 convex shoulders wait the central angle throttling groove 4 more than 1 group that distributes every 1/4 circle; Along circumference normal direction projection, valve body boss 3 is along the circumferential direction every throttling limit 9 that 1/4 circle distribution straightway and two minor faces of isosceles triangle join, rotary spool 2, throttling groove 4 priorities on the spool convex shoulder cooperate with throttling limit 9 linear edges and two minor faces of triangle on the valve body boss 3.As shown in Figure 3 and Figure 4, rotary spool 2 during throttling groove 4 process valve body boss 3 linear edges, is closed condition 10, during through the triangle minor face, because the variation of throttling limit axial position forms the adjusting 11 of aperture size.
Described throttling groove 4 actual sets numbers are by spool radius and the decision of throttling groove width.
As shown in Figure 4, described throttling groove 4 start-up portions are the semi-circle section, and the extension is for being the rectangular surfaces of width with the arc diameter, and rectangular surfaces length is 2～3 times arc diameter.
As shown in Figure 4, the distance on throttling limit 9 triangular apex on the described valve body boss 3 and base is more than or equal to throttling groove 4 circular arc cross sectional radius R.Guaranteeing in spool 2 rotary courses, aperture at radius with interior variation; Throttling groove 4 extensions are the rectangle groove 6 of width twice semi-circle radius, can guarantee the certain back pressure value of air pocket stream afterbody, guarantee air pocket low noise rank state.
Cavitation Noise is the main cause of throttling groove noise, and there are important relation in the flowing state of air pocket and its sounding grade.When aperture during less than radius of arc, form low pressure area at groove bottom, produce cavitation.Because cavitation produces, develops along wall, the liquid body influence is less, thereby forms more stable air pocket stream.Noise is mainly from crumbling and fall with the bubble of air pocket stream afterbody; When aperture during greater than radius of arc, air pocket mainly is subjected to the influence of throttling limit shearing effect, separate out air pocket stream along the throttling limit, exist and liquid internal because the stream of air pocket in such cases is main, the mobile influence of liquid body is very big, and its surface is a helicoid, and a part of bubble was just vanished at gas-liquid contact wall place before arriving afterbody, the shattered to pieces intensity of this kind obviously crumbles and fall greater than afterbody, and the noise magnitude significantly rises.The control throttle opening is in the semi-circle radius, and the throttling groove extension keeps a rectangle groove, can effectively keep air pocket to take place along wall, guarantees that the gas-liquid surface of contact is milder curved surface.
By the present invention, can effectively control nascent position of air pocket and nowed forming, guarantee Cavitation Noise in lower grade, guarantee general traffic requirement simultaneously with valve.
Above-mentioned circumferential regulating type throttle valve working procedure is as follows:
High pressure oil enters the valve port that throttling groove 4 and valve seal boss 3 constitute by oil suction chamber 8, and when throttling groove 4 and boss 3 straightway throttling limits were heavy mutually, throttling groove 4 was in closed condition 10; Along with the rotation of spool 2, throttling groove 4 beginnings are heavy mutually with boss 3 triangle minor face throttling limits, and then enter working state 11, and along with the increase of angle of swing, throttling groove 4 quantity that participate in work increase; Because the triangle minor face is equipotential not axially, throttling groove 4 apertures that enter operation interval increase along with the increase of spool 2 angle of swing.Spool one step of 2 angle of swing increases, throttle opening increases to maximum value, and (Fig. 3 a), continuation along with rotation, aperture diminish gradually (Fig. 3 c), throttling groove 4 beginnings are heavy mutually with boss 3 straightway throttling limits, enter off working state (Fig. 3 b), all close, formed the variation of throttling groove quantity and the continuous control of flow then up to all throttlings.Along with spool angular range to 180 degree, repeat process just now.Because the maximum opening of work throttling groove is all less than radius of arc, so noise remains lower grade.And realized the effect of noise reduction.
Claims (4)
1. a rotating regulation type throttling valve comprises valve body and spool; It is characterized in that: spool (2) convex shoulder waits the central angle throttling groove more than 1 group (4) that distributes every 1/4 circle; Along circumference normal direction projection, valve body boss (3) is along the circumferential direction every throttling limit (9) that 1/4 circle distribution straightway and two minor faces of obtuse angle isosceles triangle join, rotary spool (2), the throttling groove on the spool convex shoulder (4) successively cooperate with throttling limit (9) linear edge and two minor faces of triangle on the valve body boss (3).
2. a kind of rotating regulation type throttling valve according to claim 1 is characterized in that: described throttling groove (4) actual sets number is by spool radius and the decision of throttling groove width.
3. a kind of rotating regulation type throttling valve according to claim 1 is characterized in that: described throttling groove (4) start-up portion is the semi-circle section, and the extension is for being the rectangular surfaces of width with the arc diameter, and rectangular surfaces length is 2～3 times arc diameter.
4. a kind of rotating regulation type throttling valve according to claim 1 is characterized in that: throttling limit (9) triangular apex on the described valve body boss (3) and the distance on base are more than or equal to throttling groove (4) circular arc cross sectional radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100598791A CN100564966C (en) | 2008-02-26 | 2008-02-26 | Rotating regulation type throttling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100598791A CN100564966C (en) | 2008-02-26 | 2008-02-26 | Rotating regulation type throttling valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101251195A CN101251195A (en) | 2008-08-27 |
| CN100564966C true CN100564966C (en) | 2009-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100598791A Expired - Fee Related CN100564966C (en) | 2008-02-26 | 2008-02-26 | Rotating regulation type throttling valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100564966C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014096189A1 (en) * | 2012-12-21 | 2014-06-26 | Bielomatik Leuze Gmbh + Co. Kg | Flow control valve adjustable according to viscosity |
| CN104088838B (en) * | 2014-05-12 | 2015-12-02 | 浙江大学 | A kind of hydraulic control unscrewing type one-way valve |
| CN104863917B (en) * | 2015-04-01 | 2016-10-12 | 淮海工学院 | The hydraulic flow of a kind of AC servo machinery driving and direction compound control valve |
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2008
- 2008-02-26 CN CNB2008100598791A patent/CN100564966C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101251195A (en) | 2008-08-27 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20120226 |