CN207830254U - A kind of normally closed hydraulic control pressure reducing valve of board-like threeway - Google Patents
A kind of normally closed hydraulic control pressure reducing valve of board-like threeway Download PDFInfo
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- CN207830254U CN207830254U CN201820028763.0U CN201820028763U CN207830254U CN 207830254 U CN207830254 U CN 207830254U CN 201820028763 U CN201820028763 U CN 201820028763U CN 207830254 U CN207830254 U CN 207830254U
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Abstract
A kind of normally closed hydraulic control pressure reducing valve of board-like threeway, contains cover board（1）, spool（2）, valve body（3）, spring（4）, spring bumper cover（5）And entrance P, outlet A, oil return inlet T, control mouth X, it exports between entrance and oil return opening, spool, cover board, valve body three form control chamber（16）, control chamber is connected to control mouth, and spool, spring bumper cover, valve body three form spring cavity（6）The internal holes being connected with outlet are equipped in spool, spring cavity is communicated with internal holes, spool is coordinated with valve body by minimal clearance, spool is more than spool and spring cavity mating surface diameter with control chamber mating surface diameter, spring is mounted in spring cavity, and cover board and spring bumper cover are all mounted on valve body, and entrance, outlet, oil return opening and control mouth are all set on valve body.The utility model can realize the zero-pressure state of outlet, solve the complete zero-pressure of the single spur track when a pumping plant drives multiple loads, do not impacted to other branches.
Description
Technical field
The utility model is related to a kind of hydraulic control valves, more particularly to a kind of board-like normally closed hydraulic control pressure reducing valve of threeway.
Background technology
The hydraulic valve designed according to " negative-feedback of series connection decompression type pressure " principle is known as pressure reducing valve, and pressure reducing valve is for controlling
The branch pressure of hydraulic system processed makes its output pressure be less than system pressure.Pressure reducing valve in the prior art divides Direct Action Type, guide
The control oil of formula, piloted reducer can be by pressure reducing valve oil inside offering, also can be from fuel feeding outside pressure reducing valve.
Currently, pressure reducing valve is valve open in usual, in the premise that system pressure remains unchanged based on two logical pressure reducing valves both at home and abroad
Under, outlet pressure can only be reduced to minimal pressure force value, and the minimal pressure force value is generally higher than 0.5~0.7MPa, cannot achieve and subtracts
Pressure valve outlet pressure is zero.
The three-way pressure reducing valves such as 3DR, PPXB of external certain company production, also belong to valve open in usual, more conventional two logical pressure reducing valve
Increase oil return window at one, in order to when delivery outlet pressure passively increases, the pressure of delivery outlet is limited, it is really logical two
The outlet of pressure reducing valve increases an overflow valve, and it is zero that such overflow valve, which also cannot achieve decompression valve outlet pressure,.
Two logical pressure reducing valves and the concatenated method of reversal valve are relatively mostly used at present, realize load pressure decompression and zero-pressure.But this
Method manufacturing cost is higher, particularly evident to the hydraulic system of big flow.
When a pumping plant drives multiple loads, single load to need to be depressurized to zero-pressure completely and cannot influence other loads
In the case of, conventional vacuum valve is difficult to realize simple, quick control, such as multichannel aircraft fatigue testing stand, all kinds of dynamic hydraulics
Testing machine, static-force hydraulic testing equipment etc..
Invention content
The purpose of this utility model is intended to overcome above-mentioned the deficiencies in the prior art, and it is normally closed to provide a kind of board-like threeway
Hydraulic control pressure reducing valve, the pressure reducing valve can realize outlet zero-pressure state, can solve the single spur track when a pumping plant drives multiple loads
Complete zero-pressure, control method is simple, easy to use.
Technical solution used by realize the above-mentioned purpose of the utility model is：A kind of normally closed hydraulic control decompression of board-like threeway
Valve is structurally characterized in that containing three cover board, spool, valve body, spring, spring bumper cover and entrance, outlet, oil return opening operation windows
It with a window control mouth for control, exports between entrance and oil return opening, spool, cover board, valve body three form control
Chamber processed, control chamber are connected to control mouth, and spool, spring bumper cover, valve body three form spring cavity, are communicated equipped with n in spool
Internal holes, internal holes are connected with outlet, and spring cavity is communicated with internal holes, and spool is coordinated with valve body by minimal clearance, spool
It is more than the diameter dimension of spool and spring cavity mating surface with the diameter dimension of control chamber mating surface, spring is mounted in spring cavity,
Cover board and spring bumper cover are all mounted on valve body, and entrance, outlet, oil return opening, control mouth are all set on valve body.
The quantity for the internal holes being equipped in the spool be n >=2 arbitrary number, preferably 3.
The spool is coordinated with valve body by minimal clearance, and usual gap is 5 μm~12 μm.
The cover board, spring bumper cover are mounted on by screw I on valve body, and cover board passes through 0 shape circle I and valve seal, bullet
Spring cover board passes through O-ring IV and valve seal.
When spool is from control chamber end movement to spring cavity end, there are three types of shapes for the connected relation of three operation windows
State is followed successively by：Outlet oil return opening be not connected to entrance, outlet be not connected to oil return opening be not connected to yet entrance, outlet be not connected to back
Hydraulic fluid port is connected to entrance.Whenever entrance is not connected to oil return opening, and whenever all control mouth and its excess-three operation window
It is not connected to.
The utility model default conditions（Control mouth pressure is less than 0.2MPa）Under, outlet pressure is zero-pressure, at this time outlet with
Oil return opening is connected, and inlet pressure oil is closed, and by the pressure of control control mouth, can realize the decompression of outlet output pressure,
Pressure relief ranges cover system maximum pressure.
Compared with the existing technology, advantage and effect are：
1, when being closed using default entry, exporting the working condition being connected to oil return opening, after control mouth decompression, outlet connects
Logical oil return opening realizes that outlet zero-pressure does not influence the pressure of other branches at this point, entrance is closed.
2, it is controlled using independent control mouth.The hydraulic circuit of smaller flow is only needed to control the hydraulic pressure of larger flow
The pressure change of oil circuit.In use, the external control oil circuit device of control mouth connection can by external conventional control oil circuit device
Easily to realize a variety of pressure control modes, the function expansibility of the normally closed hydraulic control pressure reducing valve of board-like threeway of the utility model compared with
Good, and pressure oscillation is steady, impact is minimum, and effective protection hydraulic system improves the safety of hydraulic system.
3, the utility model is compact-sized, easy for installation, and maintainability is preferable, and range of regulation is high（It is adjustable to 35MPa）, favorably
It is automatically controlled in realization.
Description of the drawings
Fig. 1 is the structural schematic diagram of the best embodiment of the utility model.
Specific implementation mode
Further detailed description is done to the utility model with the example of specific implementation below in conjunction with the accompanying drawings, however it is described
Embodiment should not be construed in a limiting sense, in conjunction with the accompanying drawings made by the detailed description of non-limiting embodiment, can make
The technical characteristics of the utility model, objects and advantages will become apparent.
From figure 1 it appears that the utility model contains cover board 1, spool 2, valve body 3, spring 4, spring bumper cover 5 and entrance
P, A, three operation windows of oil return inlet T and window --- a control mouth X for control are exported, outlet A is located at entrance P and returns
Between hydraulic fluid port T, spool 2, cover board 1,3 three of valve body form control chamber 16, and control chamber 16 is connected to control mouth X, spool 2, spring
Cover board 5,3 three of valve body form spring cavity 6, set that there are three internal holes in spool 2：Internal holes I 10, internal holes II 12, internal holes
III 9, this three internal holes are connected, and internal holes II 12 are connected with outlet A, and spring cavity 6 is communicated with internal holes III 9, to make
It obtains spring cavity 6 with outlet A to be connected, forms pressure negative-feedback, spool 2 is coordinated with valve body 3 by minimal clearance（Gap is generally
5 μm~12 μm）, there are relative motion, spools 2 to match with spring cavity 6 more than spool 2 with 16 mating surface diameter dimension of control chamber for the two
Conjunction face diameter dimension, makes 16 effective compression area of control chamber be more than 6 effective compression area of spring cavity, and spring 4 is mounted on spring cavity 6
Interior, spring 4 provides precompression to spool 2, and cover board 1 and spring bumper cover 5 are all mounted on valve body 3, and entrance P is set on valve body 3,
Oil-feed port for connecting external pumping plant, outlet A are set on valve body 3, and for connecting external loading, oil return inlet T is set to valve
On body 3, the oil return pipe for connecting external pumping plant, control mouth X is set on valve body 3, for connecting external oil route controller.
When spool 2 moves to 6 end of spring cavity from 16 end of control chamber (16 left end of control chamber in Fig. 1)（Spring cavity in Fig. 1
6 right ends）, there are three types of states for the connected relation of three operation windows, are followed successively by：Outlet A connection oil return inlet T be not connected to entrance P,
Outlet A is not connected to that oil return inlet T is not connected to entrance P yet, outlet A is not connected to oil return inlet T connection entrance P.
The cover board 1, spring bumper cover 5 are mounted on by screw I 7 on valve body 3, and cover board 1 passes through 0 shape circle I 15 and valve body 3
Sealing, spring bumper cover 5 are sealed by O-ring IV 8 and valve body 3.
The utility model is additionally provided with O-ring II 13, O-ring III 14 for connecting the mounting surface sealing for using equipment.
When the utility model is used, it is mounted on using in equipment by screw II 11.
The operation principle of the utility model can be analyzed in two kinds of situation：
1. realizing outlet A zero-pressure states
When control mouth X pressure is less than 0.2MPa, control mouth X pressure acts on the oil pressure that control chamber 16 forms control chamber 16
Power, the insufficient pressure is with 4 precompression of spring for overcoming spring 4 to generate, and 2 holding position of spool is constant at this time, is in control chamber 16
End（16 left end of control chamber in Fig. 1）.Hydraulic oil enters from entrance P, and spool 2 is sealed with 3 clearance fit of valve body, leads to entrance
P is not communicated with outlet A, is exported A at this time and is connected with oil return inlet T, to realize the zero-pressure state of outlet A.
2. realizing outlet A decompressions
When control mouth X pressure is in 0.2MPa to a certain value between system pressure, control chamber 16 is controlled the oil of mouthful X
The oil pressure of pressure initiation control chamber 16, the pressure overcome 4 precompression of spring and spool 2 are driven to be moved to spring cavity 6, make outlet
A is closed with oil return inlet T, outlet A is connected to entrance P, and establishes pressure in outlet A, and the pressure for exporting A passes through in spool 2
Portion hole I 10, internal holes II 12, internal holes III 9 feed back to spring cavity 6, form the oil pressure of spring cavity 6.When " the oil of control chamber 16
Pressure is equal to the sum of oil pressure and 4 power of spring of spring cavity 6 " when, spool 2 is in equilibrium state, and maintains the pressure of outlet A not
It is dynamic, realize the decompression output of outlet A.Adjusting control mouth X pressure values, the pressure value for exporting A change and reach stable therewith.
Control mouth X is in system maximum pressure（It is i.e. consistent with the pressure of entrance P）When, when control chamber 16, spring cavity 6 simultaneously
It is acted on by system maximum pressure, because effective compression area of control chamber 16 is more than effective compression area of spring cavity 6, makes control
The oil pressure of chamber 16（In Fig. 1 to the right）More than the oil pressure of spring cavity 6（In Fig. 1 to the left）, spool 2 is to the movement of spring cavity 6 and moves
It moves to the end of spring cavity 6（6 right end of spring cavity in Fig. 1）, compared to hydraulic oil in two chambers（Spring cavity 6, control chamber 16）Area
The power that difference generates, 4 precompression of spring are negligible.Entrance P is connected to outlet A completely at this time, while exporting A and oil return inlet T
It is not connected to（Clearance fit seals）, export A and reach maximum pressure output state.
The quantity for the internal holes being equipped in the spool 2 can also be the arbitrary number of n >=2.
When the utility model is used, the utility model is mounted on the mounting surface of used equipment, on these mounting surfaces
There are corresponding entrance P, outlet A, oil return inlet T, control mouth X and threaded hole for fixing, the roughness Ra on the surface of mounting surface
Less than or equal to 1.6um.The oil-feed port for the external pumping plant that the entrance P is connected, the external loading that outlet A is connected, oil return
The oil return pipe for the external pumping plant that mouth T is connected, the external oil route controller that control mouth X is connected all is existing equipment,
Connection type is also as it is known to those skilled in the art that no longer repeating.
Claims (5)
1. a kind of normally closed hydraulic control pressure reducing valve of board-like threeway, it is characterized in that containing cover board（1）, spool（2）, valve body（3）, spring（4）、
Spring bumper cover（5）And entrance（P）, outlet（A）, oil return opening（T）Three operation windows and a window control mouth for control
（X）, outlet（A）Positioned at entrance（P）With oil return opening（T）Between, spool（2）, cover board（1）, valve body（3）Three forms control chamber
（16）, control chamber（16）With control mouth（X）Connection, spool（2）, spring bumper cover（5）, valve body（3）Three forms spring cavity（6）,
Spool（2）The interior internal holes communicated equipped with n, internal holes and outlet（A）It is connected, spring cavity（6）It is communicated with internal holes, spool
（2）With valve body（3）Coordinated by minimal clearance, spool（2）With control chamber（16）The diameter dimension of mating surface is more than spool（2）With
Spring cavity（6）The diameter dimension of mating surface, spring（4）Mounted on spring cavity（6）It is interior, cover board（1）And spring bumper cover（5）All install
In valve body（3）On, entrance（P）, outlet（A）, oil return opening（T）, control mouth（X）All it is set to valve body（3）On.
2. the normally closed hydraulic control pressure reducing valve of board-like threeway described in accordance with the claim 1, it is characterized in that the spool（2）Inside it is equipped with
The quantity of internal holes is the arbitrary number of n >=2.
3. the normally closed hydraulic control pressure reducing valve of board-like threeway according to claim 2, it is characterized in that the spool（2）Inside it is equipped with
The quantity n of internal holes is 3.
4. the normally closed hydraulic control pressure reducing valve of board-like threeway described in accordance with the claim 1, it is characterized in that the spool（2）With valve body
（3）Fit clearance be 5 μm~12 μm.
5. the normally closed hydraulic control pressure reducing valve of board-like threeway described in accordance with the claim 1, it is characterized in that the cover board（1）, spring cup
Plate（5）Pass through screw I（7）Mounted on valve body（3）On, cover board（1）Pass through 0 shape circle I（15）With valve body（3）Sealing, spring bumper cover
（5）Pass through O-ring IV（8）With valve body（3）Sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820028763.0U CN207830254U (en) | 2018-01-09 | 2018-01-09 | A kind of normally closed hydraulic control pressure reducing valve of board-like threeway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820028763.0U CN207830254U (en) | 2018-01-09 | 2018-01-09 | A kind of normally closed hydraulic control pressure reducing valve of board-like threeway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207830254U true CN207830254U (en) | 2018-09-07 |
Family
ID=63392261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820028763.0U Active CN207830254U (en) | 2018-01-09 | 2018-01-09 | A kind of normally closed hydraulic control pressure reducing valve of board-like threeway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207830254U (en) |
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2018
- 2018-01-09 CN CN201820028763.0U patent/CN207830254U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220507 Address after: 265500 Fenghuangshan Road, Fushan District, Yantai City, Shandong Province Patentee after: Yantai aeronautical Hydraulic Control Co.,Ltd. Address before: 265500 Yantai aviation hydraulic control Co., Ltd., No. 181, Fenghuangshan Road, Fushan District, Yantai City, Shandong Province Patentee before: Wu Guangyu |