CN106567944A - Multiple-step variable-cross-section slide valve pair for high-flow servo valve - Google Patents
Multiple-step variable-cross-section slide valve pair for high-flow servo valve Download PDFInfo
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- CN106567944A CN106567944A CN201610833783.0A CN201610833783A CN106567944A CN 106567944 A CN106567944 A CN 106567944A CN 201610833783 A CN201610833783 A CN 201610833783A CN 106567944 A CN106567944 A CN 106567944A
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- 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
- F16K11/0716—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 with fluid passages through the valve member
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Sliding Valves (AREA)
Abstract
The invention provides a multiple-step variable-cross-section slide valve pair for a high-flow servo valve. A valve element of the slide valve pair adopts a multiple-step variable-cross-section structural design. The middle section of the valve element adopts a large-diameter four-step design and is used for high-flow load oil outputting, the two ends of the valve element adopt small-diameter steps, high-dynamic movement is realized under the action of control oil, and therefore the problem of restraining between high flow and high dynamic of load oil in a traditional servo valve is solved.
Description
Technical field
The present invention relates to technical field of hydraulic, more particularly to a kind of big flow servo valve multi-step variable cross-section guiding valve
Pair, for the aerospace craft electro-hydraulic servo control such as rocket, guided missile.
Background technology
Electrohydraulic servo valve is a kind of controller that output flow or pressure size and direction are accurately controlled by input current
Part, is the crucial control element of the aerospace craft electrohydraudic servomechanism such as rocket, guided missile.The power stage of servo valve adopts guiding valve
Pair, guiding valve pair are made up of valve element and valve pocket, are the core components of power stage guiding valve.
Guiding valve pair realizes that valve element is moved in valve pocket in the presence of prestage control oil, wherein, dynamic characteristic and valve element
Diameter be inversely proportional to, if the driving force of i.e. prestage control oil is constant, the secondary diameter of guiding valve is bigger, and which controls oily driving again
Lower dynamic characteristic will be lower.In addition, the load oil flow of the secondary output of guiding valve is directly proportional to valve core diameter, i.e. the diameter of guiding valve pair
Bigger, then the flow of the load oil of its output is bigger.Therefore, there is the oily big flow of load in traditional servo valve and high dynamic is mutual
The problem of restriction, i.e., cannot be under the conditions of the oily big flow of load, it is ensured that the high dynamic performance of servo valve.
The content of the invention
The technical problem to be solved in the invention is：There is the oily big flow of load and high dynamic phase for traditional servo valve
A kind of problem for mutually restricting, there is provided big flow servo valve multi-step variable cross-section guiding valve pair, the secondary valve element of the guiding valve is using more
Ledge structure, its interlude adopt four step of major diameter, and two ends are small-diameter step, that is, meet the output of servo valve interlude big
The requirement of flow load oil, can realize high responsive movement again under control oil effect.
The above-mentioned purpose of the present invention is realized by below scheme：
A kind of big flow servo valve multi-step variable cross-section guiding valve pair, including valve pocket and valve element, on valve pocket from left to right according to
It is secondary to offer the first oil-feed port, the first load hydraulic fluid port, oil return opening, the second load hydraulic fluid port and the second oil-feed port, and save with four
Stream side, from left to right respectively first throttle while, second throttling while, the 3rd throttling while and the 4th throttling while；In the main body of valve element
6 steps coaxial with valve element main body are provided with, each step is on cylindrical structure and outer wall and offers balancing slit, wherein：The
One step and the 6th step are located at the left and right two ends of valve element respectively and outside diameter is D1；Second step, the 3rd step, the 4th
Rank and the 5th step are laid in the main body stage casing of valve element from left to right successively along center spool axis direction and outside diameter is D2,
D1<D2；There is in its right end face of second step the first working edge, there is in the left end face of the 3rd step the second working edge,
The left end face in its right end face of the 4th step with the 3rd working edge, the 5th step has the 4th working edge；When valve element is filled
When entering the centre position of valve pocket, four working edges are corresponded with four throttling sides of valve pocket successively, and introduce control when outside
When oil acts on the end face of valve element first step and the 6th step：
If under the differential pressure action that left and right end controls oil, valve element to left movement, then high-voltage oil liquid flow through the first oil-feed port,
First throttle side, first load hydraulic fluid port reach load high pressure chest, load low pressure chamber fluid flow through the second load hydraulic fluid port, Section three
Flow out behind stream side, oil return opening；
If under the differential pressure action of left and right control oil promoting valve element to move right, high-voltage oil liquid flows through the second fuel feeding
Mouthful, the 4th throttling side, the second load hydraulic fluid port reach load high pressure chest, load low pressure chamber fluid flow through the first load hydraulic fluid port, the
Flow out behind two throttling sides, oil return opening.
Above-mentioned big flow servo valve multi-step variable cross-section guiding valve pair, also including left embedded valve pocket and right embedded valve pocket,
Using identical hollow cylinder structure, the left and right two ends of valve pocket are respectively embedded in, and one end is connected with the end face outside of valve pocket, it is embedding
Enter and there is clearance seal between part and valve pocket；When valve element is moved in valve pocket, the first step of valve element is in left embedded valve pocket
It is interior to move along valve element center line axis direction, and the 6th step of valve element is transported along valve element center line axis direction in right embedded valve pocket
It is dynamic, wherein：
Cannelure is offered on the outer wall of left embedded valve pocket, as logical oil ring groove, and the logical oil ring groove outer surface with
Two through holes are opened up between left embedded valve pocket inner surface, respectively as the oily passage of the first control and the oily passage of the second control, is used for
Control oil is incorporated into into the outer face of first step so that control oil forms pressure on the end face of first step, promotes valve element
Motion；Cannelure is opened up between the fixing end of logical oil ring groove and left embedded valve pocket, as closure gasket groove, for placing sealing
Circle；
Cannelure is offered on the outer wall of right embedded valve pocket, as logical oil ring groove, and the logical oil ring groove outer surface with
Two through holes are opened up between right embedded valve pocket inner surface, respectively as the oily passage of the 3rd control and the oily passage of the 4th control, is used for
Control oil is incorporated into into the outer face of the 6th step so that control oil forms pressure on the end face of the 6th step, promotes valve element
Motion；Cannelure is opened up between the fixing end of logical oil ring groove and right embedded valve pocket, as closure gasket groove, for placing sealing
Circle.
Above-mentioned big flow servo valve multi-step variable cross-section guiding valve pair, also including two straight pins, and the main body of valve element
Inside offers left drainback passage and right drainback passage, wherein：
Left drainback passage includes the first subchannel, the second subchannel and the 3rd subchannel；First subchannel is from
The straight hole of first balancing slit its right end face on the left of one step left end face to the 3rd step, the straight hole are same with valve element main body
Axle；Second subchannel is the inclined hole opened up by second step left side, and the inclined hole is connected with the first subchannel；Described
Three subchannels are the straight hole vertically opened up from first balancing slit outer surface on the left of the 3rd step, the vertical straight hole and first
Subchannel is connected；Fill in a straight pin sealing in the left side port of the first subchannel；
Right drainback passage includes the 4th subchannel, the 5th subchannel and the 6th subchannel；4th subchannel is from
The straight hole of first balancing slit left end face on the right side of six step its right end faces to the 4th step, the straight hole are same with valve element main body
Axle；5th subchannel is the inclined hole opened up by the 5th step left side, and the inclined hole is connected with the 4th subchannel；Described
Six subchannels are the straight hole vertically opened up from first balancing slit on the right side of the 4th step, the vertical straight hole and the 4th subchannel
Connection；Fill in another straight pin and seal in the right side port of the 4th subchannel.
Above-mentioned big flow servo valve multi-step variable cross-section guiding valve pair, the periphery of first step and left embedded valve pocket
With 6～13 microns of fit clearance between inwall；Between the inwall of the periphery of the 6th step and right embedded valve pocket with 6～
13 microns of fit clearance.
The periphery of above-mentioned big flow servo valve multi-step variable cross-section guiding valve pair, left embedded valve pocket and right embedded valve pocket
With 1～3 micron of fit clearance and the inwall of valve pocket between.
Above-mentioned big flow servo valve multi-step variable cross-section guiding valve pair, second step, the 3rd step, the 4th step and
With 3～6 microns of fit clearance between the inwall of the periphery and valve pocket of five steps.
Above-mentioned big flow servo valve multi-step variable cross-section guiding valve pair, the axiality of six on valve element step are less than 2
Micron.
The present invention compared with prior art, with advantages below：
Structure design of the secondary valve element of guiding valve of the present invention using multi-step variable cross-section, wherein, valve element interlude is using big straight
Four steps in footpath are used to realize heavy traffic load oil output, and valve element two ends adopt small-diameter step, can be in the work of control oil
Realize that high dynamic is moved with, so as to solve the restriction problem between the oily big flow of load in traditional servo valves and high dynamic.
Description of the drawings
Fig. 1 is the big flow servo valve multi-step variable cross-section guiding valve auxiliary structure schematic diagram of the present invention；
Fig. 2 is the secondary housing configuration schematic diagram of guiding valve of the present invention；
Fig. 3 is the secondary valve core structure schematic diagram of guiding valve of the present invention；
Fig. 4 is the structural representation of the embedded valve pocket in the secondary left side of guiding valve of the present invention；
Fig. 5 is the structural representation of the embedded valve pocket in the secondary right side of guiding valve of the present invention；
Fig. 6 is the structural representation of the secondary straight pin of guiding valve of the present invention.
Specific embodiment
The present invention is described in further detail with instantiation below in conjunction with the accompanying drawings：
Structural representation as shown in Figure 1, the big flow servo valve multi-step variable cross-section guiding valve pair of the present invention, including a left side
Embedded valve pocket 1, straight pin 2, valve pocket 3, valve element 4, right embedded valve pocket 5.
As shown in Fig. 2 valve pocket 3 adopts traditional structure design.Offer the first fuel feeding on valve pocket 3 from left to right successively
Mouth 31, first loads hydraulic fluid port 32, the load hydraulic fluid port 34 of oil return opening 33, second and the second oil-feed port 35, and has four throttling sides, by
Left-to-right be respectively first throttle while 36, second throttling while the 37, the 3rd throttling while 38 and the 4th throttling while 39.
As shown in figure 3, the secondary valve element 4 of guiding valve of the present invention adopts multi-step variable section structure, i.e., set in the main body of valve element 4
There are 6 steps coaxial with valve element main body, each step is on cylindrical structure and outer wall and offers balancing slit.Wherein：First
, respectively positioned at the small-diameter step at the left and right two ends of valve element, for realizing high dynamic, which is cylindrical for step 401 and the 6th step 406
A diameter of D1；Second step 402, the 3rd step 403, the 4th step 404 and the 5th step 405 along center spool axis direction by
Left-to-right is laid in the main body stage casing of valve element 4 successively, and this four steps are major diameter step, for realizing the oily big flow of load,
Its outside diameter is D2, D1<D2.There is in its right end face of second step 402 first working edge 409, the 3rd step 403
There is in left end face the second working edge 410, there is in its right end face of the 4th step 404 the 3rd working edge 411, the 5th step
405 left end face has the 4th working edge 412；When valve element 4 loads the centre position of valve pocket 3, four working edges successively with
Four throttling sides of valve pocket correspond.
The present invention fixes two embedded valve pockets at the two ends of valve pocket, i.e., left to be embedded in valve pocket 1 and right embedded valve pocket 5.Such as Fig. 4
With the structure chart shown in Fig. 5, the two embedded valve pockets adopt identical hollow cylinder structure, be respectively embedded in the left and right of valve pocket
Two ends, and one end is connected with the end face outside of valve pocket, there is clearance seal between its embedded part and valve pocket.When valve element 4 is in valve
In set 3 during motion, the first step 401 of valve element is moved along valve element center line axis direction in left embedded valve pocket 1, and the of valve element
Six steps 406 are moved along valve element center line axis direction in right embedded valve pocket 5.As shown in figure 4, in the outer wall of left embedded valve pocket 1
On offer cannelure, as logical oil ring groove 14, and open between 14 outer surface of logical oil ring groove and left embedded 1 inner surface of valve pocket
If two through holes, respectively as the oily passage 11 of the first control and the oily passage 12 of the second control, for control oil is incorporated into first
The outer face of step 401 so that control oil forms pressure on the end face of first step 401, promotes valve element 4 to move；In logical oil
Cannelure is opened up between the fixing end of annular groove 14 and left embedded valve pocket 1, as closure gasket groove 13, for placing sealing ring.Such as Fig. 5
It is shown, cannelure is offered on the outer wall of right embedded valve pocket 5, as logical oil ring groove 54, and in 54 outer surface of logical oil ring groove
Two through holes are opened up between 5 inner surface of right embedded valve pocket, respectively as the oily passage 51 of the 3rd control and the oily passage of the 4th control
52, for control oil to be incorporated into the outer face of the 6th step 406 so that control oil is formed on the end face of the 6th step 406
Pressure, promotes valve element 4 to move；Cannelure is opened up between the fixing end of logical oil ring groove 54 and right embedded valve pocket 5, as sealing ring
Groove 53, for placing sealing ring.
Using above-described embedded housing configuration, closing can be formed between second step 402 and left embedded valve pocket 1
Chamber, equally can form closing chamber between the 5th step 405 and right embedded valve pocket 5, according to the secondary oil circuit design structure of guiding valve,
During valve core movement, two above closing intracavity can flow in or out hydraulic oil, and unimpeded to guarantee its oil return, the present invention is in valve
Drainback passage has been opened up in core main body.As shown in figure 3, the present invention offers 407 He of left drainback passage in the body interior of valve element 4
Right drainback passage 408.Wherein：Left drainback passage 407 includes the first subchannel, the second subchannel and the 3rd subchannel；This first
Subchannel be from 401 left end face of first step to the 3rd step 403 on the left of first balancing slit its right end face straight hole, this is straight
Hole is coaxial with valve element main body；Second subchannel is the inclined hole opened up by 402 left side of second step, the inclined hole and the first subchannel
Connection；3rd subchannel is the straight hole vertically opened up from first balancing slit outer surface on the left of the 3rd step 403, and this is vertical straight
Hole is connected with the first subchannel.Right drainback passage 408 includes the 4th subchannel, the 5th subchannel and the 6th subchannel；4th is sub
Passage be from 406 its right end face of the 6th step to the 4th step 404 on the right side of first balancing slit left end face straight hole, the straight hole
It is coaxial with valve element main body；5th subchannel is the inclined hole opened up by 405 left side of the 5th step, and the inclined hole and the 4th subchannel connect
It is logical；6th subchannel is the straight hole vertically opened up from first balancing slit on the right side of the 4th step 404, the vertical straight hole and the 4th
Subchannel is connected.The hydraulic oil in valve element interlude major diameter end face chamber can be linked up by the two drainback passages with oil return.
After left drainback passage 407 and right drainback passage 408 have been opened up in valve element main body, the present invention is using as shown in Figure 6
Straight pin close the port of the two drainback passages, i.e., filling in a straight pin 2 in the left side port of the first subchannel is carried out
Block, and another straight pin 2 is filled in the right side port of the 4th subchannel blocked.
Internal leakage and resolution index in view of servo valve, in the guiding valve pair of the present invention：Six platforms on valve element
The axiality of rank is less than 2 μm；Match somebody with somebody with 6 μm～13 μm between the inwall of the periphery of first step 401 and left embedded valve pocket 1
Close gap；With 6 μm～13 μm of fit clearance between the inwall of the periphery of the 6th step 406 and right embedded valve pocket 5；Zuo Qian
Enter between valve pocket 1 and the periphery and the inwall of valve pocket 3 of right embedded valve pocket 5 with 1 μm～3 μm of fit clearance；Second step
402nd, there are 3 μm～6 μm between the inwall of the periphery and valve pocket 3 of the 3rd step 403, the 4th step 404 and the 5th step 405
Fit clearance.The internal leakage index for meeting servo valve was so both can ensure that, the requirement of its resolution can have been met again.
Guiding valve of the present invention is secondary, and straight pin 2 is pressed into two drainback passage ports of valve element 4 first when in use, then will
Valve element 4 loads the centre position of valve pocket 3, i.e. first, second, third and fourth working edge, first, second, third and fourth throttling side respectively with valve pocket
Correspond, left embedded valve pocket 1, right embedded valve pocket 5 are finally separately mounted to the left and right two ends of valve pocket.
The oily passage of control from two embedded valve pockets introduces the first step 401 and the 6th that control oil acts on valve element 3
During the end face of step 406：
If under the differential pressure action that left and right end controls oil, valve element flows through the first oil-feed port to left movement, then high-voltage oil liquid
31st, the load of first throttle side 36, first hydraulic fluid port 32 reaches load high pressure chest, and the fluid for loading low pressure chamber flows through the second load hydraulic fluid port
34th, the 3rd throttling side 38, flow out after oil return opening 33；
If under the differential pressure action of left and right control oil promoting valve element to move right, high-voltage oil liquid flows through the second oil-feed port
35th, the 4th throttling side 39, second load hydraulic fluid port 34 reaches load high pressure chest, and the fluid for loading low pressure chamber flows through the first load hydraulic fluid port
32nd, the second throttling side 37, flow out after oil return opening 33.
The above, only one specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and appoints
What those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all
Should be included within the scope of the present invention.
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.
Claims (7)
1. a kind of big flow servo valve multi-step variable cross-section guiding valve pair, including valve pocket (3) and valve element (4), by a left side on valve pocket (3)
The first oil-feed port (31), the first load hydraulic fluid port (32), oil return opening (33), the second load hydraulic fluid port (34) and the are offered successively to the right side
Two oil-feed ports (35), and with four throttling sides, from left to right respectively first throttle in (36), the second throttling (37), the
Three throttlings are at (38) and the 4th throttling (39)；It is characterized in that：The main body of valve element (4) be provided with 6 it is coaxial with valve element main body
Step, each step is on cylindrical structure and outer wall and offers balancing slit, wherein：First step (401) and the 6th step
(406) the left and right two ends and outside diameter for being located at valve element respectively are D1；Second step (402), the 3rd step (403), the 4th
Rank (404) and the 5th step (405) along center spool axis direction be laid in successively from left to right valve element (4) main body stage casing and
Outside diameter is D2, D1<D2；There is in its right end face of second step (402) the first working edge (409), the 3rd step (403)
Left end face on have the second working edge (410), in its right end face of the 4th step (404) have the 3rd working edge (411),
The left end face of the 5th step (405) has the 4th working edge (412)；When valve element (4) loads the centre position of valve pocket (3),
Four working edges are corresponded with four throttling sides of valve pocket successively, and when the outside control oil that introduces acts on valve element (3) first
During the end face of step (401) and the 6th step (406)：
If under the differential pressure action that left and right end controls oil, valve element to left movement, then high-voltage oil liquid flow through the first oil-feed port (31),
First throttle side (36), the first load hydraulic fluid port (32) reach load high pressure chest, and the fluid for loading low pressure chamber flows through the second load oil
Mouth (34), the 3rd throttling side (38), oil return opening (33) flow out afterwards；
If under the differential pressure action of left and right control oil promoting valve element to move right, high-voltage oil liquid flows through the second oil-feed port
(35), the 4th throttling side (39), the second load hydraulic fluid port (34) reaches load high pressure chest, and loading the fluid of low pressure chamber, to flow through first negative
Load hydraulic fluid port (32), the second throttling side (37), oil return opening (33) flow out afterwards.
2. a kind of big flow servo valve according to claim 1 multi-step variable cross-section guiding valve pair, it is characterised in that：Also wrap
Left embedded valve pocket (1) and right embedded valve pocket (5) are included, using identical hollow cylinder structure, the left and right two of valve pocket is respectively embedded in
Hold, and one end is connected with the end face outside of valve pocket, there is clearance seal between embedded part and valve pocket；When valve element (4) is in valve pocket
(3), in during motion, the first step (401) of valve element is moved along valve element center line axis direction in left embedded valve pocket (1), and valve element
The 6th step (406) move along valve element center line axis direction in right embedded valve pocket (5), wherein：
Cannelure is offered on the outer wall of left embedded valve pocket (1), as logical oil ring groove (14), and in the logical oil ring groove (14) outward
Two through holes are opened up between surface and left embedded valve pocket (1) inner surface, respectively as the oily passage (11) of the first control and the second control
Liquefaction passage (12), for control oil to be incorporated into the outer face of first step (401) so that control oil is in first step
(401) pressure is formed on end face, valve element (4) motion is promoted；Logical oil ring groove (14) and left embedded valve pocket (1) fixing end it
Between open up cannelure, as closure gasket groove (13), for placing sealing ring；
Cannelure is offered on the outer wall of right embedded valve pocket (5), as logical oil ring groove (54), and in the logical oil ring groove (54) outward
Two through holes are opened up between surface and right embedded valve pocket (5) inner surface, respectively as the oily passage (51) of the 3rd control and the 4th control
Liquefaction passage (52), for control oil to be incorporated into the outer face of the 6th step (406) so that control oil is in the 6th step
(406) pressure is formed on end face, valve element (4) motion is promoted；Logical oil ring groove (54) and right embedded valve pocket (5) fixing end it
Between open up cannelure, as closure gasket groove (53), for placing sealing ring.
3. a kind of big flow servo valve according to claim 2 multi-step variable cross-section guiding valve pair, it is characterised in that：Also wrap
Two straight pins (2) are included, and the body interior of valve element (4) offers left drainback passage (407) and right drainback passage (408), its
In：
Left drainback passage (407) is including the first subchannel, the second subchannel and the 3rd subchannel；First subchannel is from
The straight hole of one step (401) left end face to first balancing slit its right end face on the left of the 3rd step (403), the straight hole and valve
Core main body is coaxial；Second subchannel is the inclined hole opened up by second step (402) left side, and the inclined hole and the first son are logical
Road is connected；3rd subchannel is the straight hole vertically opened up from first balancing slit outer surface on the left of the 3rd step (403), institute
State vertical straight hole to connect with the first subchannel；Fill in straight pin (2) sealing in the left side port of the first subchannel；
Right drainback passage (408) is including the 4th subchannel, the 5th subchannel and the 6th subchannel；4th subchannel is from
The straight hole of six steps (406) its right end face to first balancing slit left end face on the right side of the 4th step (404), the straight hole and valve
Core main body is coaxial；5th subchannel is the inclined hole opened up by the 5th step (405) left side, and the inclined hole and the 4th son are logical
Road is connected；6th subchannel is the straight hole vertically opened up from first balancing slit on the right side of the 4th step (404), described vertical
Straight hole connect with the 4th subchannel；Fill in another straight pin (2) sealing in the right side port of the 4th subchannel.
4. the multi-step variable cross-section guiding valve pair of a kind of big flow servo valve according to Claims 2 or 3, it is characterised in that：
With 6～13 microns of fit clearance between the inwall of the periphery of first step (401) and left embedded valve pocket (1)；6th
With 6～13 microns of fit clearance between the inwall of the periphery of rank (406) and right embedded valve pocket (5).
5. the multi-step variable cross-section guiding valve pair of a kind of big flow servo valve according to Claims 2 or 3, it is characterised in that：
With between 1～3 micron of cooperation between left embedded valve pocket (1) and the periphery and the inwall of valve pocket (3) of right embedded valve pocket (5)
Gap.
6. the multi-step variable cross-section guiding valve pair of a kind of big flow servo valve according to Claims 2 or 3, it is characterised in that：
The periphery and valve pocket (3) of second step (402), the 3rd step (403), the 4th step (404) and the 5th step (405) it is interior
With 3～6 microns of fit clearance between wall.
7. a kind of big flow servo valve according to claim 1 multi-step variable cross-section guiding valve pair, it is characterised in that：Valve element
On six steps axiality be less than 2 microns.
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| CN201610833783.0A CN106567944B (en) | 2016-09-19 | 2016-09-19 | A kind of big flow servo valve multi-step variable cross-section slide valve pair |
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| CN201610833783.0A CN106567944B (en) | 2016-09-19 | 2016-09-19 | A kind of big flow servo valve multi-step variable cross-section slide valve pair |
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| CN106567944B CN106567944B (en) | 2019-03-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108895178A (en) * | 2018-08-01 | 2018-11-27 | 佛山信卓派思机械科技有限公司 | A kind of valve |
| CN110260025A (en) * | 2019-05-31 | 2019-09-20 | 陕西法士特齿轮有限责任公司 | It is a kind of for controlling the proportion magnetic valve of clutch |
| CN111059321A (en) * | 2019-12-24 | 2020-04-24 | 中航工业南京伺服控制***有限公司 | Double-circuit electro-hydraulic servo valve service life test and testing device |
| CN112855647A (en) * | 2021-03-23 | 2021-05-28 | 同济大学 | Large-flow shaft flow distribution servo valve |
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| WO1995026476A1 (en) * | 1994-03-29 | 1995-10-05 | Komatsu Ltd. | Pilot pressure operated directional control valve and operation cylinder control device |
| CN201218247Y (en) * | 2008-06-16 | 2009-04-08 | 哈尔滨工业大学 | Emergency protection mechanism of three-stage electrohydraulic servo valve |
| CN202768769U (en) * | 2012-09-19 | 2013-03-06 | 北京汽车动力总成有限公司 | Locking control valve |
| CN203348634U (en) * | 2013-05-17 | 2013-12-18 | 关学超 | Moving coil two-stage slide valve type flow control electro-hydraulic servo valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895178A (en) * | 2018-08-01 | 2018-11-27 | 佛山信卓派思机械科技有限公司 | A kind of valve |
| CN110260025A (en) * | 2019-05-31 | 2019-09-20 | 陕西法士特齿轮有限责任公司 | It is a kind of for controlling the proportion magnetic valve of clutch |
| CN110260025B (en) * | 2019-05-31 | 2024-02-06 | 陕西法士特齿轮有限责任公司 | Proportional electromagnetic valve for controlling clutch |
| CN111059321A (en) * | 2019-12-24 | 2020-04-24 | 中航工业南京伺服控制***有限公司 | Double-circuit electro-hydraulic servo valve service life test and testing device |
| CN112855647A (en) * | 2021-03-23 | 2021-05-28 | 同济大学 | Large-flow shaft flow distribution servo valve |
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