CN109441903A - Load-sensitive multiple directional control valve - Google Patents
Load-sensitive multiple directional control valve Download PDFInfo
- Publication number
- CN109441903A CN109441903A CN201811506716.3A CN201811506716A CN109441903A CN 109441903 A CN109441903 A CN 109441903A CN 201811506716 A CN201811506716 A CN 201811506716A CN 109441903 A CN109441903 A CN 109441903A
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- Prior art keywords
- valve
- valve body
- load
- directional control
- multiple directional
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Lift Valve (AREA)
Abstract
The present invention relates to hydraulic control system fields, disclose a kind of load-sensitive multiple directional control valve, the load-sensitive multiple directional control valve includes valve body, the valve body includes the commutation connection valve body for being provided with valve body hole, the load-sensitive multiple directional control valve further includes the valve pocket being fixed in the valve body hole and the valve rod that can be moved axially in the valve pocket, wherein, multiple oil-through-holes corresponding with the valve chamber in the commutation at place connection valve body respectively are provided on the side wall of the valve pocket.Load-sensitive multiple directional control valve provided by the invention is not easy clamping stagnation valve rod, and avoids abrasion valve body hole, reduces leakage rate, to improve service performance.
Description
Technical field
The present invention relates to hydraulic control system fields, more particularly to a kind of load-sensitive multiple directional control valve.
Background technique
Load-sensitive multiple directional control valve combines more than two valve blocks, to manipulate the fortune of multiple executive components
Dynamic, it can be combined multiple valve groups, therefore it is compact-sized according to the requirement of different hydraulic systems, and pipeline is simple, pressure
Power loss is small, and installation is simple.Wherein, load-sensitive multiple directional control valve because can reasonable distribution respectively act flow, in work
It is widely applied in the walking machine of journey machinery, Transport Machinery and other multiple actuator movements of requirement manipulation.
The valve body of existing load-sensitive multiple directional control valve is mostly cast iron, and hardness is lower, when valve rod and valve body hole fit clearance
In when being caught in iron filings, valve rod slidably will lead to valve body hole scratch with respect to valve body hole, and then make valve rod clamping stagnation, and valve body hole is not
It is wear-resisting, it will lead to valve rod when longer using the time and valve body hole fit clearance increase, leakage rate increases；In addition, high-pressure and hydraulic
The active force that oil acts on valve body in all directions is identical, but wall thickness is different everywhere for valve body, and the local deflection of wall thickness thickness is small,
The small local deflection of wall thickness is big, will lead to valve body bore deformation in this way, and when super-pressure, valve body hole deflection will be bigger, lead to liquid
Press clamping force big, valve rod clamping stagnation leads to the poor linearity of entire valve output.
Summary of the invention
The purpose of the invention is to provide a kind of load-sensitive multiple directional control valve, which is not easy
Clamping stagnation valve rod, and abrasion valve body hole is avoided, leakage rate is reduced, to improve service performance.
To achieve the goals above, the present invention provides a kind of load-sensitive multiple directional control valve, and the load-sensitive multichannel is changed
It include valve body to valve, the valve body includes the commutation connection valve body for being provided with valve body hole, and the load-sensitive multiple directional control valve is also
Including the valve pocket being fixed in the valve body hole and the valve rod that can be moved axially in the valve pocket, wherein the valve pocket
Multiple oil-through-holes corresponding with the valve chamber in the commutation at place connection valve body respectively are provided on side wall.
Preferably, the material hardness of the valve pocket is greater than the material hardness of the valve body.
Preferably, gap is provided between the inner surface of the valve body hole at the peripheral surface of the valve pocket and place.
Preferably, the value model in the gap between the inner surface of the valve body hole at the peripheral surface of the valve pocket and place
It encloses for 0.1-0.2mm.
Preferably, the valve pocket includes radially outstanding of the end setting of main pipe and the main pipe
Rank, the step are located at one end of the valve body hole at place and are fixed on the valve body.
Preferably, it is arranged between the main pipe and the valve body hole at place along the axial direction interval of the main pipe
There are multiple sealing rings.
Preferably, multiple annular grooves for being used to accommodate the sealing ring respectively are provided on the outer wall of the main pipe, it is described
Oil-through-hole is arranged on the part of the main pipe between the annular groove.
Preferably, it is provided with what multiple rows of axial direction along the main pipe arranged in the circumferential direction of the main pipe
The oil-through-hole.
Preferably, the different oil-through-holes for arranging the corresponding position in the oil-through-hole are along the circumferential direction side of the main pipe
It is arranged to alignment.
Preferably, the valve body is provided with first valve body, tail connection valve body and is located at the first valve body and institute
The one or more commutation connection valve body between tail connection valve body is stated, the valve body is integrally formed.
In the above-mentioned technical solutions, due to being fixedly installed valve pocket in valve body hole, multiple energy are provided on the side wall of valve pocket
Enough oil-through-holes corresponding with the circulation valve chamber of hydraulic oil on valve body respectively, valve rod can be axially movably arranged in valve pocket,
I.e. valve rod is directly used cooperatively with valve pocket, and valve rod is not directly contacted with valve body, and the deformation of such valve body will not be directly delivered to valve
Bar reduces the probability for making valve rod there is a situation where clamping stagnation because of valve body deformation, and avoids stem wear valve body hole and make
The problem of gap increase between valve rod and valve body hole causes amount of leakage to increase, to improve service performance.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of the load-sensitive multiple directional control valve of the preferred embodiment for the present invention；
Fig. 2 is the broken section structural schematic diagram of the load-sensitive multiple directional control valve of the preferred embodiment for the present invention；
Fig. 3 is the structural schematic diagram of the valve pocket of the preferred embodiment for the present invention；
Fig. 4 is the main view of Fig. 3；
Fig. 5 is the E-E cross-sectional view in Fig. 4；
Fig. 6 is the K-K cross-sectional view in Fig. 5；
Fig. 7 is the top view of the load-sensitive multiple directional control valve of the preferred embodiment for the present invention；
Fig. 8 is the schematic diagram of the load-sensitive multiple directional control valve in Fig. 7.
Description of symbols
Valve body -1；Valve rod -2；Valve pocket -3；Oil-through-hole-H；Main pipe -31；Step -32；Sealing ring-S；Annular groove-G.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " typically refers to
With reference to upper and lower, left and right shown in the drawings；" inside and outside " refers to inside and outside the profile relative to each component itself.
The present invention provides a kind of load-sensitive multiple directional control valve, and the load-sensitive multiple directional control valve includes valve body 1, described
Valve body 1 includes the commutation connection valve body for being provided with valve body hole, and the load-sensitive multiple directional control valve further includes being fixed on the valve
Valve pocket 3 in body opening and the valve rod 2 that can be moved axially in the valve pocket, wherein be provided on the side wall of the valve pocket 3 more
A oil-through-hole H corresponding with the valve chamber in the commutation at place connection valve body respectively.Wherein, high duty alloy can be selected in valve pocket 3
Steel quenching, guarantees certain degree of hardness.
In the above-mentioned technical solutions, as shown in figs 1 to 6, due to being fixedly installed valve pocket 3, the side of valve pocket 3 in valve body hole
Be provided on wall it is multiple can be respectively with the corresponding oil-through-hole of valve chambers in the commutation connection valve body at place, valve rod 2 can be axial
It is movably arranged in valve pocket 3, i.e., valve rod 2 is directly used cooperatively with valve pocket 3, and valve rod 2 is not directly contacted with valve body 1, such valve
The deformation of body 1 will not be directly delivered to valve rod 2, reduce the probability of happening for the case where making 2 clamping stagnation of valve rod because of the deformation of valve body 1,
And the problem of valve rod 2 wears valve body hole and makes the gap increase between valve rod 2 and valve body hole that amount of leakage be caused to increase is avoided,
To improve service performance.
Wherein it is preferred to which the material hardness of the valve pocket 3 is greater than the material hardness of the valve body 1.It is highly preferred that valve pocket 3
Material hardness be greater than the material hardnesses of iron filings, in this way when being caught in iron filings in valve pocket 3 and 2 fit clearance of valve rod, iron filings it is hard
It spends not as good as valve pocket 3 and valve rod 2, scratch will not be generated to valve pocket 3 and valve rod 2.
Since to act on the active force on valve body 1 in all directions identical for high pressure liquid pressure oil, but wall thickness is not everywhere for valve body 1
Together, the place of wall thickness thickness, deflection is small, and the small local deflection of wall thickness is big, will lead to valve body bore deformation in this way, when super-pressure,
Valve body hole deflection will be bigger, cause hydraulic card clamping force big, if valve rod 2 directly cooperates with valve body hole, be easy to make 2 clamping stagnation of valve rod,
Lead to the poor linearity of entire valve output.Valve pocket 3 is had an impact when valve body bore deformation in order to prevent, to be better protected from valve rod
2 clamping stagnations, as shown in Figure 2, it is preferable that be arranged between the inner surface of the valve body hole of the peripheral surface and place of the valve pocket 3
There is gap.In this way when logical high pressure, valve body 1 is deformed, but has gap between valve body 1 and valve pocket 3, and the deformation of valve body 1 will not be straight
Connect and pass to valve pocket 3, valve pocket 3 will not deform, so as to well solve load-sensitive multiple directional control valve 2 clamping stagnation of valve rod and
The problem of reliability deficiency.
Also, the value range in the gap between the peripheral surface of valve pocket 3 and the inner surface of valve body hole can be according to valve body hole
Deflection flexible setting, for valve body hole deflection be up to 0.05mm and valve pocket 3 center main aperture cylindricity be 3 μm
The case where, it is preferable that the value model in the gap between the inner surface of the valve body hole of the peripheral surface and place of the valve pocket 3
It encloses for 0.1-0.2mm.Enough spaces can be reserved to the deformation of valve body 1 in this way, excessive leakage rate will not be caused.
In addition, in order to which by valve pocket 3, opposite valve body 1 is fixedly installed in valve body hole, it is preferable that the valve pocket 3 includes supervisor
The step 32 radially outstanding of the end of body 31 and the main pipe 31 setting, the step 32 are located at the described of place
It one end of valve body hole and is fixed on the valve body 1.As shown in Figure 1, valve body hole corresponds to the settable phase in one end of installation step 32
The groove answered, fastener D may pass through the bottom wall setting of step 32 and groove, and fastener D may be, for example, holding screw.
In order to which valve body 1 can either be allowed to deform, and the gap between valve pocket 3 and valve body hole can be sealed, it is preferable that described
Axial direction between main pipe 31 and the valve body hole at place along the main pipe 31 is arranged at intervals with multiple sealing ring S.
Wherein, sealing ring can be O-ring seal.The uniform acting hydraulic power of the internal diameter of valve pocket 3 and outer diameter direction in this way, valve pocket 3 will not
Deformation, although valve body 1 has deformation, has certain gap, is sealed by O-ring, so valve body 1 between valve pocket 3 and valve body 1
Deformation will not be transferred to valve pocket 3, valve body hole will not deform and make 2 clamping stagnation of valve rod.
Further, sealing ring S in order to facilitate the installation of, it is preferable that be provided with multiple use on the outer wall of the main pipe 31
In the annular groove G for accommodating the sealing ring S respectively, in order to avoid oil-through-hole H and annular groove G generates interference, the oil-through-hole H setting exists
On the part of the main pipe 31 between the annular groove G.
In order to keep oil-through-hole H corresponding with the circulation valve chamber of hydraulic oil on valve body 1 respectively, as seen in figures 3-6, preferably
Ground is provided with the logical oil that multiple rows of axial direction along the main pipe 31 arranges in the circumferential direction of the main pipe 31
Hole H.It is further preferred that the different oil-through-hole H for arranging the corresponding position in the oil-through-hole H are along the main pipe's 31
Circumferential direction alignment setting.Make the structural strength of valve pocket 3 higher in this way, and can satisfy logical oil mass requirement, while making valve body 1
Small volume.
In view of split blade type valve body 1 generally uses tie-rod, centre plus O-ring seal sealing, when valve body 1 is drawn with screw rod
Next, valve body 1 can deform, and lead to valve body bore deformation, be easy to make 2 clamping stagnation of valve rod, it is therefore preferred that the valve body 1 is provided with head
Join valve body, tail connection valve body and positioned at the first valve body and the tail connection valve body between one or more described in
Commutation connection valve body, the valve body 1 are integrally formed.It is highly preferred that valve body 1 is integrally formed using forging type.As shown in fig. 7,
First valve body is the part of the corresponding valve body 1 of first U, and it is the part that tail joins the corresponding valve body 1 of W, commutation connection that tail, which joins valve body,
Valve body is the part of the corresponding valve body 1 of each commutation connection X1-X5.
Fig. 8 shows the schematic diagram of the load-sensitive multiple directional control valve in Fig. 7, wherein 100 indicate master winch H1,200 tables
Show that right lateral walks RT, 300 expression left lateral walk LT, and 400 indicate secondary elevator H2, and 500 indicate luffing E.As shown in Figure 7 and Figure 8, the load
Sensitive multiple directional control valve may include first U, tail connection W and each commutation connection X1-X5, and valve body 1 uses monoblock type, sets in first valve body
It is equipped with triple valve 10 and main overflow valve 11, measurement pressure port MP and MT are provided in first valve body.
Refering to what is shown in Fig. 1, valve pocket 3 is fixed on the valve body hole of valve body 1 in load-sensitive multiple directional control valve of the invention
Interior, sealing ring S (such as O-ring) is set in the outside of valve pocket 3, and valve rod 2 is axially movably set in valve pocket 3, sets on valve rod 2
It is equipped with cut-off groove 12, the both ends of the valve body hole of the installation valve rod 2 of valve body 1 are respectively arranged with left end cap L and right end cap R, right end cap R
It is inside provided with commutation spring 4, is also respectively provided with one-way throttle valve 5 and positioning screw 6 on left end cap L and right end cap R, in addition,
Unidirectional Fill valve 7, check valve 8 and pressure compensation spool 9 are additionally provided on valve body 1, be provided in valve body 1 chamber P0, P0', P1,
P2, T1, T2 are provided with opening A, B on the end face of valve body 1, when a mouthful logical oil, push valve rod 2 toward the movement of the direction right end cap R, P0'
It is communicated with P1, the oil from oil pump enters 9 cavity of resorption of pressure-compensated valve core, 9 cavity of resorption of pressure compensation spool after P0' chamber, P1 chamber
Oil reach the end face of triple valve 10 as shown in Figure 8 by the feedback of check valve 8 and selected higher when there is multi-disc to work at the same time
Pressure connection, P0' mouthful of control remain at the constant pressure that triple valve 10 is set, realization load-sensitive control with P1 mouthfuls of pressure difference
System, P1 and PLSPressure is equal, and oil enters P2 chamber after pressure compensation spool 9, and P2 is communicated with opening A, gives opening A fuel feeding, works as b
When mouthful logical oil, push valve rod 2 mobile toward the direction left end cap L, P0 is communicated with P1, and oil is after P0 chamber and P1 chamber into pressure compensation
9 cavity of resorption of spool, P1 and PLSPressure is equal, and oil enters P2 chamber after pressure compensation spool 9, and P2 chamber is communicated with opening B, to opening
B confession oil.Wherein, as shown in Fig. 1 and Fig. 7-8, opening A, B be may respectively be in A1-A5 and mutual corresponding two in B1-B5；a
Mouth may respectively be in a1-a5 and mutual corresponding two in b1-b5 with b mouthfuls.In addition, as shown in Fig. 2, due to valve pocket 3 internal diameter
Equably acting hydraulic power, valve pocket 3 will not deform with outer diameter direction, although valve body 1 has deformation, between valve pocket 3 and valve body 1
There is certain gap, which is sealed by O-ring, so the deformation of valve body 1 will not be transferred to valve pocket 3, valve pocket 3 will not become
Shape not will lead to 2 clamping stagnation of valve rod.
In conclusion load-sensitive multiple directional control valve of the invention, valve rod 2 are not directly contacted with valve body 1, valve rod 2 and valve
Set 3 is directly used cooperatively, and is avoided valve rod 2 and is worn valve body hole and the gap increase between valve rod 2 and valve body hole is made to cause to reveal
The problem of amount increases, valve pocket 3 can be selected superior alloy steel quenching, guarantee certain degree of hardness, and O-ring is used between valve pocket 3 and valve body 1
Sealing, guarantees certain interval between the two, and when being caught in iron filings in valve pocket 3 and 2 fit clearance of valve rod, the hardness of iron filings is not as good as valve
Set 3 and valve rod 2 will not generate scratch to valve rod 2 and valve pocket 3, and when logical high pressure, valve body 1 is deformed, but valve body 1 and valve pocket 3 it
Between have gap, the deformation of valve body 1 will not be directly passed to valve pocket 3, and valve pocket 3 will not deform, so that it is quick to have well solved load
Feel 2 clamping stagnation of valve rod of multiple directional control valve and the problem of reliability deficiency, improves the service performance of load-sensitive multiple directional control valve.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited thereto.At this
, can be with various simple variants of the technical solution of the present invention are made in the range of the technology design of invention, including each particular technique
Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various combinations of possible ways
No further explanation will be given.But it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to the present invention
Protection scope.
Claims (10)
1. a kind of load-sensitive multiple directional control valve, which is characterized in that the load-sensitive multiple directional control valve includes valve body (1), institute
Stating valve body (1) includes the commutation connection valve body for being provided with valve body hole, and the load-sensitive multiple directional control valve further includes being fixed on institute
The valve rod (2) stating the valve pocket (3) in valve body hole and capable of being moved axially in the valve pocket (3), wherein the valve pocket (3)
Multiple oil-through-holes (H) corresponding with the valve chamber in the commutation at place connection valve body respectively are provided on side wall.
2. load-sensitive multiple directional control valve according to claim 1, which is characterized in that the material hardness of the valve pocket (3)
Greater than the material hardness of the valve body (1).
3. load-sensitive multiple directional control valve according to claim 1, which is characterized in that the peripheral surface of the valve pocket (3)
Gap is provided between the inner surface of the valve body hole at place.
4. load-sensitive multiple directional control valve according to claim 3, which is characterized in that the peripheral surface of the valve pocket (3)
The value range in the gap between the inner surface of the valve body hole at place is 0.1-0.2mm.
5. load-sensitive multiple directional control valve according to claim 3, which is characterized in that the valve pocket (3) includes main pipe
(31) and the step (32) radially outstanding of the end of the main pipe (31) setting, the step (32) are located at place
The valve body hole one end and be fixed on the valve body (1).
6. load-sensitive multiple directional control valve according to claim 5, which is characterized in that the main pipe (31) and place
Axial direction between the valve body hole along the main pipe (31) is arranged at intervals with multiple sealing rings (S).
7. load-sensitive multiple directional control valve according to claim 6, which is characterized in that on the outer wall of the main pipe (31)
Be provided with it is multiple for accommodating the annular grooves (G) of the sealing ring (S) respectively, oil-through-hole (H) setting the annular groove (G) it
Between the main pipe (31) part on.
8. load-sensitive multiple directional control valve according to claim 7, which is characterized in that the circumferential direction in the main pipe (31)
The oil-through-hole (H) that multiple rows of axial direction along the main pipe (31) arranges is provided on direction.
9. load-sensitive multiple directional control valve according to claim 8, which is characterized in that difference is arranged in the oil-through-hole (H)
Corresponding position the oil-through-hole (H) along the main pipe (31) circumferential direction be aligned setting.
10. load-sensitive multiple directional control valve according to claim 1 to 9, which is characterized in that the valve body (1)
Be provided with first valve body, tail connection valve body and positioned at the first valve body and the tail connection valve body between one or
Multiple commutations join valve body, and the valve body (1) is integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811506716.3A CN109441903A (en) | 2018-12-10 | 2018-12-10 | Load-sensitive multiple directional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811506716.3A CN109441903A (en) | 2018-12-10 | 2018-12-10 | Load-sensitive multiple directional control valve |
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| Publication Number | Publication Date |
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| CN109441903A true CN109441903A (en) | 2019-03-08 |
Family
ID=65557720
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811506716.3A Pending CN109441903A (en) | 2018-12-10 | 2018-12-10 | Load-sensitive multiple directional control valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524294A (en) * | 2020-10-28 | 2021-03-19 | 武汉船用机械有限责任公司 | Multi-way valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524294A (en) * | 2020-10-28 | 2021-03-19 | 武汉船用机械有限责任公司 | Multi-way valve |
| CN112524294B (en) * | 2020-10-28 | 2022-04-29 | 武汉船用机械有限责任公司 | Multi-way valve |
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Application publication date: 20190308 |