CN205533499U - Direct action type proportion choke valve - Google Patents
Direct action type proportion choke valve Download PDFInfo
- Publication number
- CN205533499U CN205533499U CN201620090601.0U CN201620090601U CN205533499U CN 205533499 U CN205533499 U CN 205533499U CN 201620090601 U CN201620090601 U CN 201620090601U CN 205533499 U CN205533499 U CN 205533499U
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- China
- Prior art keywords
- valve
- spool
- spring
- case
- conical surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a direct action type proportion choke valve comprises valve body (1b), case (2b), valve barrel (3b) and spring (4b), its characterized in that: case (2b) on be provided with conical surface C and oil groove G, conical surface C's maximum outer diameter is D, the little distolateral case outside diameter of conical surface C is d, and D> D, be provided with hydraulic fluid port A and hydraulic fluid port B on the valve body (1b), case (2b) holds chamber V with valve body (1b) assembly back formation transition, the one end effect of case (2b) has the spring force, and control fc is applyed to the other end, valve barrel (3b) is in the one side that has spring (4b). The utility model discloses to small -size / special purpose's such as heavily loaded robot miniature hydraulic system, reduce the interior discharge of proportion choke valve under in off position by a wide margin, when the case valve opening increased because of normal wear fit clearance trace, obvious change can not take place for interior discharge to improve its reliability and life, the zero lap can be realized to the valve port, does not have the control blind spot, has improved response speed.
Description
Technical field
The utility model belongs to Hydraulic Field, more particularly to a kind of direct action type proportional choke valve, be primarily adapted for use in miniature,
Small-sized hydraulic system.
Background technology
Traditional low discharge direct action type proportional choke valve, Fig. 1 is shown in by the schematic diagram of its typical structure, in the valve opening of valve A 1a
Being provided with valve core of the spool valve A2a, spool right-hand member is provided with spring A3a.Valve body is provided with oil pocket A and B, spool is provided with
Oil groove G.Under original state, A chamber is disconnected with B chamber, when applying the adjustable electromagnetic force of control power Fc(or liquid to the left end of spool
Pressure), after overcoming the precompression of right-hand member spring A3a, spool moves right, and A chamber is gradually turned on through oil groove G with B chamber.By regulation
Control power Fc, can regulate the flow area between A chamber and B chamber, thus play the function of ratio throttling.
Prior art defect:
1) interior discharge is bigger than normal, and the trace abrasion of spool valve opening is easily caused interior discharge and rises rapidly.
The proportional throttle valve of prior art, when being closed, the sealing between A chamber and B chamber, rely on spool cylindrical
Coordinate with the small-gap suture between valve opening and seal, for reducing dead band, as it is shown in figure 1, the sealing between the top of oil groove G and B chamber
Annulus X is the shortest, and this directly results in the sealing effectiveness between A, B chamber and is deteriorated, and interior discharge is bigger than normal.Further, when operating between relatively
Long, gap trace increases because of abrasion for guiding valve and valve opening, and interior discharge will rise rapidly, until disabler.
In conventional application, because flow system flow is big, A, B chamber a small amount of in let out systematic entirety can be affected less.
But when this structure is applied to low discharge hydraulic system, and require what A chamber or B chamber under closed mode needed strictly to obturage
During occasion, A, B chamber a small amount of in let out, also systematic function can be produced the biggest adverse effect.
Micro hydraulic system (" a kind of oil cylinder commutation and the volumetric speed control of the applicant's separate case application simultaneously as shown in Figure 2
Hydraulic system "), when cylinder diameter is less, require that again oil cylinder loads under F effect outside, fuel cut-off state can longer time
Between holding position, then proportional throttle valve (7) can not use the proportional throttle valve of conventional structure, and otherwise this choke valve is in off position
Under a small amount of in let out the obvious downslide that can cause oil cylinder.
2) response speed is slow
The proportional throttle valve of prior art, for ensureing effectively cutting off between A, B chamber under closed mode, valve port must be designed as
Plus lap summit distance X to B chamber of oil groove G (the covering amount be), and covering amount X can not be designed to too small, otherwise sealing effectiveness
Worse.This just directly results in the increase of controlling dead error, and the response time extends.
Summary of the invention
The purpose of this utility model is to provide a kind of direct action type proportional choke valve, the especially suitable small-sized/weight of this choke valve
Carry the micro hydraulic system of the specific uses such as robot, significantly reduce proportional throttle valve in off position under interior discharge；Enter one
Step ground, spool valve opening is time because of normal wear, fit clearance is increased slightly, and interior discharge will not occur significantly to change, thus improve
Its reliability and service life；Valve port can realize zero lap, thus improves response speed.
The purpose of this utility model and solve its technical problem underlying and realize by the following technical solutions: Yi Zhongzhi
Dynamic formula proportional throttle valve, is made up of valve body 1b, spool 2b, valve pocket 3b and spring 4b, described spool 2b is provided with conical surface C and
Oil groove G, the maximum outside diameter of conical surface C is D, and the spool outside diameter of the little side of conical surface C is d, and D > d；It is provided with oil on valve body 1b
Transition cavity volume V is formed after mouth A and hydraulic fluid port B, spool 2b and valve body 1b assembling；One end effect of spool 2b has spring force, the other end
Apply control power Fc；Valve pocket 3b is having the side of spring 4b.
Above-mentioned a kind of direct action type proportional choke valve, described valve pocket 3b is at the opposite side having spring 4b.
Above-mentioned a kind of direct action type proportional choke valve, cancels described valve pocket 3b, the described spool a diameter of d of 2b left end, right-hand member
A diameter of D1, and D1 >=D > d.
Utility model works principle:
In an initial condition, spool is under the effect of spring 4b precompression, and the aperture formation cone that conical surface C is adjacent to valve body hole is close
Envelope, A chamber is cut off reliably with B chamber.
When spool left end applies the adjustable electromagnetic force of control power Fc(or hydraulic coupling), Fc overcomes the spring precompressed of the other end
After power, spool moves right, and the conical surface C on spool disengages with valve body hole aperture, and oil groove G gradually connects with transition cavity volume V simultaneously,
The fluid in A, B chamber is connected with transition cavity volume V through oil groove G, by regulation control power Fc, the ditch of adjustable oil groove G and transition cavity volume V
Logical area, reaches the purpose of ratio throttling.
Rely on due to cutting off between A, B chamber is conical surface seal, and and sealing ring between oil groove G and transition cavity volume V
Strip length X is unrelated.Therefore, zero lap or negative covering (i.e. seal band length X can be designed between oil groove G and transition cavity volume V
Equal to zero or less than zero, now between A chamber and B chamber, actually it is equivalent to zero lap), thus improve its response speed.
In described scheme, A chamber achieves partition reliably with B chamber by cone sealing.A chamber and the control chamber of spool left end
Also it is dependent on spool between although, between B chamber and right-hand member spring cavity to coordinate with the small-gap suture of valve opening and seal, but seal length can
To be designed to long enough, therefore the interior discharge in A chamber and B chamber can be accomplished minimum.
If necessary, it is also possible between spool and valve body (valve pocket), seal is set, in making A chamber, B chamber almost nil
Let out (arranging seal back valve core force of sliding friction to increase, need suitably increase spring force and control power, to reduce stagnant ring).
In aforesaid all schemes, choke valve is normally closed type, and its initial bit is closed mode, is gradually increased control power
Fc, choke valve opening is gradually increased.
But, by exchanging spring and controlling the action direction of power, then choke valve becomes open in usual, and its initial bit is for opening
State.Being gradually increased control power Fc, the opening of choke valve is gradually reduced, until completely closing.
The utility model patent compared with prior art has clear advantage and beneficial effect.Can by above technical scheme
Knowing, the utility model patent has the following characteristics that when spool is closed, and A chamber and B chamber rely on cone to seal partition, several
Do not produce leakage；The normal trace of spool valve opening weares and teares and will not destroy cone sealing effectiveness, therefore better reliability, service life is more
Long；Choke valve can realize zero lap, significantly improves response speed.
Above-mentioned advantage is particularly suited for the micro hydraulic system that requirement is higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art,
Fig. 2 is a kind of micro hydraulic system,
Fig. 3 is structural representation of the present utility model,
Fig. 4 is another embodiment of the present utility model,
Fig. 5 is another embodiment of the present utility model.
Figure marks:
1a, valve A, 2a, spool A, 3a, spring A.
1b, valve body, 2b, spool, 3b, valve pocket, 4b, spring.
1, fuel tank, 2, prime mover, 3, reversible hydraulic pump, 4, check valve A, 5, check valve B, 6, check valve, 7, hydraulic control
Proportional throttle valve, 8, two-way cylinder.
Detailed description of the invention
Below in conjunction with accompanying drawing and preferred embodiment, to a kind of direct action type proportional throttling proposed according to the utility model patent
Valve detailed description of the invention, feature and effect thereof, after describing in detail such as.
See Fig. 3, a kind of direct action type proportional choke valve, be made up of valve body 1b, spool 2b, valve pocket 3b and spring 4b, described
Spool 2b on be provided with conical surface C and oil groove G, the maximum outside diameter of conical surface C is D, and the spool outside diameter of the little side of conical surface C is d,
And D > d；Transition cavity volume V is formed after being provided with hydraulic fluid port A and hydraulic fluid port B, spool 2b and valve body 1b assembling on valve body 1b；The one of spool 2b
End effect has spring force, and the other end applies control power Fc；Valve pocket 3b is having the side of spring 4b.Such as Fig. 3.The setting of valve pocket 3b,
It is for solving the assembly problem of spool (because of D > d, spool cannot be installed) integrally through valve body hole and valve pocket hole.
Above-mentioned a kind of direct action type proportional choke valve, described valve pocket 3b is at the opposite side having spring 4b.As shown in Figure 4.Valve
The setting of set 3b, be for solve the assembly problem of spool (because of D > d, spool cannot be pacified integrally through valve body hole and valve pocket hole
Dress) for solving this problem, valve pocket 3b can also be arranged on opposite side and not affect properties of product.
Above-mentioned a kind of direct action type proportional choke valve, cancels described valve pocket 3b, the described spool a diameter of d of 2b left end, right-hand member
A diameter of D1, and D1 >=D > d.Such as Fig. 5.After designing by this, B mouth pressure can produce axial force to spool, and axial force size is equal to B
Mouth pressure and this pressure are to spool effective active area [(D12-d2) π/4] and product.If B mouth pressure is the most relatively low in Shi Yonging
(such as normal open fuel tank), or when spring force is bigger with corresponding control power, then the axial force that spool is produced by B mouth pressure, to joint
The controlling curve impact of stream valve is less.This design also can be competent at various application occasions.
In aforesaid all schemes, choke valve is normally closed type, and its initial bit is closed mode, is gradually increased control power
Fc, choke valve opening is gradually increased.
But, by exchanging spring and controlling the action direction of power, then choke valve becomes open in usual, and its initial bit is for opening
State.Being gradually increased control power Fc, the opening of choke valve is gradually reduced, until completely closing.
The above, be only the preferred embodiment of the utility model patent, not appoint the utility model patent
What pro forma restriction, any without departing from the utility model art solutions content, according to the technology of the utility model patent
Any simple modification, equivalent variations and the modification that above example is made by essence, all still falls within the utility model patented technology
In the range of scheme.
Claims (3)
1. a direct action type proportional choke valve, is made up of valve body (1b), spool (2b), valve pocket (3b) and spring (4b), its feature
It is: being provided with conical surface C and oil groove G on described spool (2b), the maximum outside diameter of conical surface C is D, the spool of the little side of conical surface C
Outside diameter is d, and D > d；Being provided with hydraulic fluid port A and hydraulic fluid port B on valve body (1b), spool (2b) was formed after assembling with valve body (1b)
Cross cavity volume V；One end effect of spool (2b) has spring force, and the other end applies control power Fc；Valve pocket (3b) is having spring (4b)
Side.
2. a kind of direct action type proportional choke valve as claimed in claim 1, it is characterised in that: described valve pocket (3b) is having spring
(4b) opposite side.
3. a kind of direct action type proportional choke valve as claimed in claim 1, it is characterised in that: cancel described valve pocket (3b), described
The a diameter of d of spool (2b) left end, a diameter of D1 of right-hand member, and D1 >=D > d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620090601.0U CN205533499U (en) | 2016-01-29 | 2016-01-29 | Direct action type proportion choke valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620090601.0U CN205533499U (en) | 2016-01-29 | 2016-01-29 | Direct action type proportion choke valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205533499U true CN205533499U (en) | 2016-08-31 |
Family
ID=56772152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620090601.0U Withdrawn - After Issue CN205533499U (en) | 2016-01-29 | 2016-01-29 | Direct action type proportion choke valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205533499U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443486A (en) * | 2016-01-29 | 2016-03-30 | 贵阳海之力液压有限公司 | Direct-acting type proportional throttle valve |
-
2016
- 2016-01-29 CN CN201620090601.0U patent/CN205533499U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443486A (en) * | 2016-01-29 | 2016-03-30 | 贵阳海之力液压有限公司 | Direct-acting type proportional throttle valve |
| CN105443486B (en) * | 2016-01-29 | 2017-03-29 | 贵阳海之力液压有限公司 | A kind of direct action type proportional choke valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160831 Effective date of abandoning: 20170329 |
|
| AV01 | Patent right actively abandoned |