CN109578361A - A kind of Novel threaded plug-in rotation is straight to drive electrohydraulic servo valve - Google Patents
A kind of Novel threaded plug-in rotation is straight to drive electrohydraulic servo valve Download PDFInfo
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- CN109578361A CN109578361A CN201910057335.XA CN201910057335A CN109578361A CN 109578361 A CN109578361 A CN 109578361A CN 201910057335 A CN201910057335 A CN 201910057335A CN 109578361 A CN109578361 A CN 109578361A
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- mouthfuls
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- valve
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- 238000009434 installation Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 26
- 239000011324 bead Substances 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
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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
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Servomotors (AREA)
Abstract
The present invention provides a kind of Novel threaded plug-ins to rotate straight drive electrohydraulic servo valve, by addition spool end cover structure, reduces end face leakage.It includes direct current brushless servo motor, valve component, the valve component includes spool, valve pocket, upper end cover, lower cover, the convex part of the central axis of spool described in the output axis connection of the direct current brushless servo motor, the direct current brushless servo motor is installed in the upper end of the upper end cover, the interior of the valve pocket intracavitary is disposed with the spool, the outer circumferential surface of the upper end cover is equipped with external screw thread, the external screw thread with the installation of integrated valve block for connecting, the bottom of the spool is installed on the center positioning hole of the lower cover, it is characterized in that, the external P mouth for being connected to inner cavity is provided on the valve pocket, the different circumferential positions setting that the different P mouthfuls are generally aligned in the same plane, two groups of throttling chambers of indent are provided on the inner wall of the valve pocket, respectively A chamber, B chamber.
Description
Technical field
The present invention relates to the technical field of electrohydraulic servo valve, electro-hydraulic watch directly is driven in specially a kind of Novel threaded plug-in rotation
Take valve.
Background technique
Key element of the electrohydraulic servo valve as electrohydraulic servo-controlling system, it is both electro-hydraulic converting element and power
Amplifier element, it connects electric part and hydraulic part, realizes the conversion and amplification of electro-hydraulic signal, performance is very big
The performance of entire electrohydraulic servo-controlling system is determined in degree, the feature high with its precision, response is fast is widely used in machine
The fields such as tool, automobile, ship, Aeronautics and Astronautics and robot.
Currently, widening with electrohydraulic servo system application field, the application of robot also mentions electrohydraulic servo valve
Gone out higher requirement: high frequency sound, high reliability, contamination resistance are strong, structure is simple, small in size, working service is convenient, it is low at
And this is convenient for integrated etc., and traditional electrohydraulic servo valve has been difficult to reach above-mentioned requirements again, existing market mainstream it is miniature electro-hydraulic
Servo valve product is 30 series of Moog, E024 is serial and 242 are respectively mounted complexity, and the inner elastomeric member of electrohydraulic servo valve at present
Part makes its service life not be able to satisfy the application of robot.
Therefore robot field be badly in need of independent development it is a it is small in size, light-weight, convenient for integrated and service life extremely
The electrohydraulic servo valve of reliable high frequency sound, especially screw thread inserting type rotation is straight drives electrohydraulic servo valve.And DC servo motor exists
It is required to have the function of the frequent start-stop of low-angle in the straight application field for driving electrohydraulic servo valve of screw thread inserting type rotation, this also belongs to
In application of the DC servo motor in the servomechanism of frequent start-stop.Existing screw thread inserting type rotation is straight to drive electrohydraulic servo valve
In, it is larger to there is a problem of that end face is revealed.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of Novel threaded plug-ins to rotate straight drive electrohydraulic servo valve, pass through
Spool end cover structure is added, end face leakage is reduced.
A kind of rotation of Novel threaded plug-in is straight to drive electrohydraulic servo valve, technical solution be such that it include direct current without
Brush servo motor, valve component, the valve component include spool, valve pocket, upper end cover, lower cover, and the brush DC is watched
The convex part of the central axis of spool described in the output axis connection of motor is taken, the direct current brushless servo motor is installed on described
The upper end of end cap, the valve pocket it is interior it is intracavitary be disposed with the spool, the outer circumferential surface of the upper end cover is equipped with external screw thread, described
For external screw thread for connecting with the installation of integrated valve block, the bottom of the spool is installed on the center positioning hole of the lower cover,
It is characterized in that, the external P mouth for being connected to inner cavity, the P mouthfuls of different differences being generally aligned in the same plane is provided on the valve pocket
Circumferential position is arranged, and two groups of throttling chambers of indent, respectively A chamber, B chamber, the A chamber, B chamber are provided on the inner wall of the valve pocket
Positioned at the conplane different circumferential angle location arrangements of the inner wall circumference of the valve pocket, connection is additionally provided on the valve pocket
External A mouth, B mouthfuls, are provided with T mouthfuls on the lower cover, P mouthfuls described, A mouthfuls, the B mouthfuls of different height horizontal layouts in valve pocket,
Spool switching oil channel structures are disposed on the external annulus of the spool, the spool switching oil circuit meets following condition: working as servo
When valve is in zero-bit, P mouthfuls, A mouthfuls, B mouthfuls, T mouthfuls it is mutually isolated；Under working condition, P mouthfuls switch oil communication A mouthfuls by spool
Or B mouthfuls, T mouthfuls switch oil communication B mouthfuls or A mouthfuls by spool, and P mouthfuls, T mouthfuls are not connected to A mouthfuls or B mouthfuls simultaneously；In the spool
The bottom exterior ring cap of mandrel is equipped with spool end cap, and the spool end cap corresponds to the correspondence upper opening of spool switching oil circuit
Position is respectively arranged with down convex positioning backstop, and convex positioning backstop is flush-mounted in the top of the spool switching oil circuit respectively under corresponding
It is open and passes through glue sealing, the inner wall clearance fit of the external annulus of the spool and the valve pocket.
It is further characterized by:
The external annulus circumference of the spool sets up two groups of oil channel structures being arranged symmetrically, and every group of oil channel structures include
There are P chamber, T chamber, A slot, B slot, the external annulus corresponding position of the spool is respectively arranged with the P chamber of indent, T chamber, A slot, B slot, institute
State P chamber short transverse cover P mouthful where horizontal plane, the horizontal plane where A chamber, the P chamber connection P mouthfuls, A chamber, the T chamber
Short transverse covering B chamber where horizontal plane, the bottom of the T chamber is through the spool and is connected to T mouthfuls of the entrance,
The T chamber connects T mouthful, B chamber, horizontal plane where the short transverse covering A chamber of the A slot, A mouthfuls of places horizontal plane, the A
For connecting wherein one group of throttling chamber and A mouthful under slot working condition, the short transverse of the B slot cover horizontal plane where B chamber,
Horizontal plane where B mouthfuls is located at the A chamber place for connecting another set throttling chamber and B mouthful under the B slot working condition
The A slot, P chamber, B slot, T chamber sequence interval in plane are arranged, are individually insulated by parting bead, form one group of oil channel structures, institute
State arc range corresponding to the parting bead of the P chamber two sides of spool cover the circumference of corresponding A chamber on the working edge of the valve pocket to
Range, arc range corresponding to the parting bead of the T chamber two sides of the spool cover the correspondence B chamber on the working edge of the valve pocket
Circumference is to range, when servo valve is in zero-bit, P mouthfuls, T mouthfuls, A mouthfuls, B mouthfuls it is mutually isolated；Under working condition, A chamber is connected to A slot
Or B slot, B chamber connection B slot or A slot, oil communication simultaneously switch over；The bottom exterior ring cap of the central axis of the spool is equipped with spool
End cap, the spool end cap corresponds to the A slot, the upper opening position of B slot is respectively arranged with down convex positioning backstop, corresponding
Under convex positioning backstop be flush-mounted in the A slot, the upper opening of B slot and by glue sealing respectively, the external annulus of the spool and
The inner wall clearance fit of the valve pocket；
The location swap of the A slot and B slot, the function of total are constant；
Two identical type oil grooves or oil pocket are respectively positioned on the both ends arrangement that spool corresponds to diameter, the P chamber and T chamber place
Diametrical position it is orthogonal, the diametrical position where the A slot and B slot is orthogonal, the center of the adjacent P chamber, A slot
45 ° are divided between radian, the A chamber, B chamber on the valve pocket are respectively two, and two A chambers, B chamber are respectively positioned on pair of valve pocket inner cavity
The both ends of diameter are answered to arrange, the diametrical position where the A chamber, B chamber is orthogonal；
The P chamber, T chamber are the groove body from bottom to top for being parallel to the center spool axis arrangement；
The P chamber is identical with the arc range of T chamber, it is ensured that total it is easy to make；
The A chamber, the arc range of B chamber are identical, it is ensured that total it is easy to make；
The arc range of the A chamber be greater than the A chamber the P chamber planar arc range；
The top of elevation plane where elevation plane where described A mouthfuls is located at described P mouthfuls, the height where described B mouthfuls
The lower section of elevation plane where plane is located at described P mouthfuls；
The spool end cap is set in the bottom position of the central axis, and the valve is close in the lower end surface of the spool end cap
The upper surface arrangement of core main part, the outer ring surface of the spool end cap and the inner wall clearance fit of the valve pocket, the spool
The affixed spool main part of the installation screw by circumferential ring cloth of end cap；
The convex part of the central axis of the spool is set with Glais ring, the upper end cover through the position of the upper end cover
Corresponding position be provided with indent annular trench, the Glais ring is built in the inner sleeve ring-shaped groove；
The upper end cover passes through the upper end anchor ring of the affixed valve pocket of the first screw, and the upper end anchor ring of the valve pocket is provided with
Annular groove, the first sealing ring is equipped in the upper annular groove, and first sealing ring is close to the corresponding contact of the upper end cover
The sealing between valve pocket and upper end cover is realized in face；
The lower cover passes through the lower end anchor ring of the affixed valve pocket of the second screw, and the lower end surface of the valve pocket is provided with ring
Shape boss, the position that the upper surface of the lower cover corresponds to the annular convex platform are provided with lower annular groove, the lower annular groove
It is inside placed with the second sealing ring, the annular convex platform is embedded in the lower annular groove and is pressed in the upper end of second sealing ring
The sealing of valve pocket and lower cover is realized in face.
After applying the present invention, throttling chamber (A chamber, B chamber) is opened on valve pocket, and is combined by spool end cap with spool
The sealing for realizing the upper port of spool switching oil circuit, substantially reduces the leakage rate of end face, and it is straight to reduce screw thread inserting type rotation
The amount of leakage for driving electrohydraulic servo valve, improves power efficiency.
Detailed description of the invention
Fig. 1 is main view schematic diagram of the invention；
Fig. 2 is the side view figure structure schematic representation of valve component of the invention；
Fig. 3 is the A-A schematic cross-sectional view of this Fig. 2；
Fig. 4 is the vertical view figure structure schematic representation of Fig. 2；
Fig. 5 is that the B-B of Fig. 4 cuts open structural schematic diagram；
Fig. 6 is that the C-C of Fig. 4 cuts open three-dimensional figure structure schematic representation；
Fig. 7 is the main view schematic diagram of spool of the invention；
Fig. 8 is the vertical view figure structure schematic representation of valve pocket of the invention；
Fig. 9 is that the D-D of Fig. 8 cuts open structural schematic diagram；
Title corresponding to serial number is as follows in figure:
Direct current brushless servo motor 1, valve component 2, spool 3, valve pocket 4, upper end cover 5, external screw thread 51, lower cover 6, center
Location hole 61, P mouth 7, A chamber 9, B chamber 10, A mouth 11, B mouth 12, spool end cap 13, under convex positioning backstop 14, P chamber 15, T chamber 16, A
Slot 17, B slot 18, parting bead 19, central axis 20, installation screw 21, Glais ring 22, indent annular trench 23, the first screw 24, upper ring
Shape slot 25, the first sealing ring 26, the second screw 27, annular convex platform 28, lower annular groove 29, the second sealing ring 30.
Specific embodiment
A kind of Novel threaded plug-in rotation is straight to drive electrohydraulic servo valve, and see Fig. 1-Fig. 9: it includes direct current brushless servo motor
1, valve component 2, valve component 2 include spool 3, valve pocket 4, upper end cover 5, lower cover 6, direct current brushless servo motor 1 it is defeated
Shaft connects the convex part of the central axis 20 of spool 3, and direct current brushless servo motor 1 is installed in the upper end of upper end cover 5, valve pocket 4
It is interior it is intracavitary be disposed with spool 3, the outer circumferential surface of upper end cover 5 is equipped with external screw thread 51, and external screw thread 51 is for the peace with integrated valve block
Load connects, and the bottom of spool 3 is installed on the center positioning hole 61 of lower cover 6, and the external P for being connected to inner cavity is provided on valve pocket 4
Mouth 7, the different circumferential positions that different P mouths 7 is generally aligned in the same plane are arranged, and two groups of sections of indent are provided on the inner wall of valve pocket 4
Chamber, specially A chamber 9, B chamber 10 are flowed, A chamber 9, B chamber 10 are located at the conplane different circumferential angles position of the inner wall circumference of valve pocket 4
Arrangement is set, T mouth 8 is provided on lower cover 6, A mouth 11, the B mouth 12 being additionally provided on valve pocket 4 outside connection, P mouth 7, A mouth 11, B
Mouthfuls 12 valve pocket 4 different height horizontal layout, be disposed with spool switching oil channel structures, spool switching on the external annulus of spool 3
Oil circuit meets following condition: when servo valve is in zero-bit, P mouth 7, T mouth 8, A mouth 11, B mouth 12 are mutually isolated；Work as working condition
Under, P mouth 7 switches oil communication A mouth 11 or B mouth 12 by spool, and T mouth 8 switches oil communication B mouth 12 or A mouth 11 by spool,
P mouth 7, T mouth 8 are not connected to A mouth 11 or B mouth 12 simultaneously；The bottom exterior ring cap of the central axis 20 of spool 3 is equipped with spool end cap 13, valve
The correspondence upper opening position that core end cap 13 corresponds to spool switching oil circuit is respectively arranged with down convex positioning backstop 14, under corresponding
Convex positioning backstop 14 flush-mounted in the upper opening of spool switching oil circuit and passes through glue sealing, the external annulus and valve of spool 3 respectively
The inner wall clearance fit of set 4.
The external annulus circumference of spool 3 sets up two groups of oil channel structures being arranged symmetrically, and every group of oil channel structures include P
The external annulus corresponding position of chamber 15, T chamber 16, A slot 17, B slot 18, spool 3 is respectively arranged with the P chamber 15 of indent, T chamber 16, A slot
17, B slot 18, the horizontal plane where the short transverse covering P mouth 7 of P chamber 15, the horizontal plane where A chamber 9, P chamber 15 connect P mouth 7, A
Chamber 9, the horizontal plane where the short transverse covering B chamber 10 of T chamber 16, the bottom of T chamber 16 through spool 3 and is connected to entering for T mouth 8
Mouthful, T chamber 16 connects T mouth 8, B chamber 10, the horizontal plane of horizontal plane, 11 place of A mouth where the short transverse covering A chamber 9 of A slot 17,
Water for connecting wherein one group of throttling chamber and A mouth 11 under 17 working condition of A slot, where the short transverse covering B chamber 10 of B slot 18
Horizontal plane where plane, B mouth 12, for connecting another set throttling chamber and B mouth 12 under 18 working condition of B slot, positioned at A chamber 9
A slot 17 planar, P chamber 15, B slot 18,16 sequence interval of T chamber arrangement, be individually insulated by parting bead 19, is formed one group it is oily
Line structure, the corresponding A chamber 9 on the working edge of the covering valve pocket 4 of arc range corresponding to the parting bead 19 of 15 two sides of P chamber of spool 3
Pair of the circumference to range, on the working edge of the covering valve pocket 4 of arc range corresponding to the parting bead 19 of 16 two sides of T chamber of spool 3
Answer the circumference of B chamber 10 to range, when servo valve is in zero-bit, P mouth 7, T mouth 8, A mouth 11, B mouth 12 are mutually isolated；When work shape
Under state, A chamber 11 is connected to A slot 17 or B slot 18, B chamber 12 are connected to B slot 18 or A slot 17, oil communication simultaneously switch over；In spool 3
The bottom exterior ring cap of mandrel 20 is equipped with spool end cap 13, and spool end cap 13 corresponds to the upper opening position point of A slot 17, B slot 18
It is not provided with down convex positioning backstop 14, convex positioning backstop 14 is respectively flush-mounted in A slot 17, the upper opening of B slot 18, simultaneously under corresponding
By glue sealing, the external annulus of spool 3 and the inner wall clearance fit of valve pocket 4；
The function of the location swap of A slot 17 and B slot 18, total is constant；
Two identical type oil grooves or oil pocket are respectively positioned on the both ends arrangement of the corresponding diameter of spool 3,16 institute of P chamber 15 and T chamber
Diametrical position it is orthogonal, the diametrical position where A slot 17 and B slot 18 is orthogonal, in adjacent P chamber 15, A slot 17
45 ° are divided between heart radian, the A chamber 9, B chamber 10 on valve pocket 4 are respectively two, and two A chambers 9, B chamber 10 are respectively positioned on 4 inner cavity of valve pocket
The both ends arrangement of corresponding diameter, the diametrical position where A chamber 9, B chamber 10 are orthogonal；
P chamber 15, T chamber 16 are the groove body from bottom to top for being parallel to 3 central axis of spool arrangement；
The arc range of P chamber 15 and T chamber 16 is identical, it is ensured that total it is easy to make；The radian model of A chamber 9, B chamber 10
Enclose identical, it is ensured that total it is easy to make；
The arc range of A chamber 6 be greater than A chamber 9 P chamber 15 planar arc range；
Elevation plane where A mouth 11 is located at the top of 7 place elevation plane of P mouth, and the elevation plane where B mouth 12 is located at
The lower section of 7 place elevation plane of P mouth；
Spool end cap 13 is set in the bottom position of central axis 20, and 3 main part of spool is close in the lower end surface of spool end cap 13
The upper surface arrangement divided, the outer ring surface of spool end cap 13 and the inner wall clearance fit of valve pocket 4, spool end cap 13 pass through circumferential ring
Affixed 3 main part of spool of installation screw 21 of cloth；
The convex part of the central axis 20 of spool 3 is set with Glais ring 22, pair of upper end cover 5 through the position of upper end cover 5
Position is answered to be provided with indent annular trench 23, Glais ring 22 is built in inner sleeve ring-shaped groove 23；
Upper end cover 5 passes through the upper end anchor ring of the affixed valve pocket 4 of the first screw 24, and the upper end anchor ring of valve pocket 4 is provided with annular groove
25, the first sealing ring 26 is installed, the first sealing ring 26 is close to the correspondence contact surface of upper end cover 5, realizes valve in upper annular groove 25
Sealing between set 4 and upper end cover 5；
Lower cover 6 passes through the lower end anchor ring of the affixed valve pocket 4 of the second screw 27, and the lower end surface of valve pocket 4 is provided with annular convex platform
28, the position that the upper surface of lower cover 6 corresponds to annular convex platform 28 is provided with lower annular groove 29, and the is placed in lower annular groove 29
Two sealing rings 30, annular convex platform 28 are embedded in lower annular groove 29 and are pressed in the upper surface of the second sealing ring 30, realize valve pocket 4 with
The sealing of lower cover 6.
Its working principles are as follows: when servo valve is in zero-bit, see Fig. 3, P mouthfuls, T mouthfuls, A mouthfuls, B mouthfuls it is mutually isolated；P at this time
Mouth is connected to A chamber by P chamber, and A mouthfuls of connection A slot lower parts, T mouthfuls are connected to B chamber, B mouthfuls of connection B slot lower parts by T chamber；
Under working condition, using Fig. 3 as zero-bit, a micro- turn of angle, A chamber are connected to A slot, B chamber connection B slot, oil to a spool clockwise
Road is connected to and switches over, P mouthfuls of A mouthfuls of connections at this time, T mouthfuls of B mouthfuls of connections；A micro- turn of angle, A chamber are connected to B slot, B to b spool counterclockwise
Chamber is connected to A slot, and oil communication simultaneously switches over, P mouthfuls of B mouthfuls of connections at this time, T mouthfuls of A mouthfuls of connections；
Throttling chamber (A chamber, B chamber) is opened on valve pocket by it, and is combined by spool end cap with spool and realized spool switching
The sealing of the upper port of oil circuit substantially reduces the leakage rate of end face, reduces the straight drive electrohydraulic servo valve of screw thread inserting type rotation
Amount of leakage, improve power efficiency；
It uses DC servo motor to rotate the straight electro-hydraulic conversion portion for driving electrohydraulic servo valve as screw thread inserting type, meets
Frequent start-stop requirement in the servo valve course of work, to enhance the adaptability that servo motor externally loads variation；Reduction is watched
The shake of motor zero-bit due to caused by mechanical property is taken, to enhance electrohydraulic servo valve in the stability of zero-bit；By suitably prolonging
The time of long servo motor frequent start-stop, to enhance servo motor in the controllability of zero-bit attachment；By adding spool end cap,
Blending bolt adds glue to fix, and reduces end face leakage.
Specific embodiments of the present invention are described in detail above, but content is only the preferable implementation of the invention
Example, should not be considered as limiting the invention the practical range of creation.It is all to become according to equalization made by the invention application range
Change and improve etc., it shall still fall within the scope of this patent.
Claims (10)
1. a kind of Novel threaded plug-in rotation is straight to drive electrohydraulic servo valve comprising direct current brushless servo motor, valve component, institute
Stating valve component includes spool, valve pocket, upper end cover, lower cover, described in the output axis connection of the direct current brushless servo motor
The convex part of the central axis of spool, the direct current brushless servo motor are installed in the upper end of the upper end cover, the valve pocket
It is interior it is intracavitary be disposed with the spool, the outer circumferential surface of the upper end cover is equipped with external screw thread, and the external screw thread is used for and integrated valve block
Installation connection, the bottom of the spool is installed on the center positioning hole of the lower cover, it is characterised in that: sets on the valve pocket
It is equipped with the external P mouth for being connected to inner cavity, the different the P mouthfuls different circumferential positions settings being generally aligned in the same plane, the valve pocket
Inner wall on be provided with two groups of throttling chambers of indent, respectively A chamber, B chamber, the A chamber, B chamber are located at the inner wall circle of the valve pocket
The conplane different circumferential angle location arrangements in week are additionally provided with A mouth outside connection, B mouthfuls on the valve pocket, under described
It is provided with T mouthfuls on end cap, P mouthfuls described, A mouthfuls, the B mouthfuls of different height horizontal layouts in valve pocket, cloth on the external annulus of the spool
Be equipped with spool switching oil channel structures, spool switching oil circuit meets following condition: when servo valve is in zero-bit, P mouthfuls, A mouthfuls,
B mouthfuls, T mouthfuls it is mutually isolated；Under working condition, P mouthfuls switch oil communication A mouthfuls or B mouthfuls by spool, and T mouthfuls are switched by spool
B mouthfuls or A mouthfuls of oil communication, P mouthfuls, T mouthfuls are not connected to A mouthfuls or B mouthfuls simultaneously；The bottom exterior ring cap of the central axis of the spool is equipped with valve
Core end cap, the correspondence upper opening position that the spool end cap corresponds to spool switching oil circuit are respectively arranged with down convex positioning
Backstop, convex positioning backstop is flush-mounted in the upper opening of the spool switching oil circuit and by glue sealing, institute respectively under corresponding
State the external annulus of spool and the inner wall clearance fit of the valve pocket.
2. a kind of Novel threaded plug-in rotation as described in claim 1 is straight to drive electrohydraulic servo valve, it is characterised in that: the valve
The external annulus circumference of core sets up two groups of oil channel structures being arranged symmetrically, every group of oil channel structures include P chamber, T chamber, A slot,
B slot, the external annulus corresponding position of the spool are respectively arranged with the P chamber of indent, T chamber, A slot, B slot, the short transverse of the P chamber
The horizontal plane where horizontal plane, A chamber where P mouthfuls of covering, the P chamber connect P mouthfuls, A chamber, and the short transverse of the T chamber covers B
The bottom of horizontal plane where chamber, the T chamber through the spool and is connected to T mouthfuls of the entrance, T mouthfuls of the T chamber connection,
B chamber, horizontal plane where the short transverse covering A chamber of the A slot, A mouthful places horizontal plane, use under the A slot working condition
In connection wherein one group of throttling chamber and A mouthful, horizontal plane where the short transverse covering B chamber of the B slot, B mouthfuls of places level
Face, for connecting another set throttling chamber and B mouthfuls under the B slot working condition, positioned at the A chamber the A planar
Slot, P chamber, B slot, T chamber sequence interval arrange, are individually insulated by parting bead, form one group of oil channel structures, the P chamber two of the spool
Arc range corresponding to the parting bead of side covers the circumference of the corresponding A chamber on the working edge of the valve pocket to range, the spool
T chamber two sides parting bead corresponding to arc range cover the circumference of the correspondence B chamber on the working edge of the valve pocket to range, when
When servo valve is in zero-bit, P mouthfuls, T mouthfuls, A mouthfuls, B mouthfuls it is mutually isolated；Under working condition, A chamber is connected to A slot or B slot, the connection of B chamber
B slot or A slot, oil communication simultaneously switch over；The bottom exterior ring cap of the central axis of the spool is equipped with spool end cap, the spool
End cap corresponds to the A slot, the upper opening position of B slot is respectively arranged with down convex positioning backstop, convex positioning backstop under corresponding
Respectively flush-mounted in the A slot, the upper opening of B slot and by glue sealing, the external annulus of the spool and the valve pocket it is interior
Wall clearance fit.
3. a kind of Novel threaded plug-in rotation as claimed in claim 2 is straight to drive electrohydraulic servo valve, it is characterised in that: the A
The location swap of slot and B slot.
4. a kind of Novel threaded plug-in rotation is straight as claimed in claim 2 or claim 3 drives electrohydraulic servo valve, it is characterised in that: two
A identical type oil groove or oil pocket are respectively positioned on the both ends arrangement that spool corresponds to diameter, the diametrical position where the P chamber and T chamber
Orthogonal, the diametrical position where the A slot and B slot is orthogonal, the adjacent P chamber, A slot center radian between be divided into
45 °, A chamber, B chamber on the valve pocket are respectively two, and two A chambers, B chamber are respectively positioned on the two of the correspondence diameter of valve pocket inner cavity
End arrangement, the diametrical position where the A chamber, B chamber are orthogonal.
5. a kind of Novel threaded plug-in rotation as claimed in claim 4 is straight to drive electrohydraulic servo valve, it is characterised in that: the P
Chamber, T chamber are the groove body from bottom to top for being parallel to the center spool axis arrangement；The P chamber is identical with the arc range of T chamber；
The A chamber, the arc range of B chamber are identical；The arc range of the A chamber be greater than the A chamber the P chamber planar arc
Spend range.
6. a kind of Novel threaded plug-in rotation as described in claim 1 is straight to drive electrohydraulic servo valve, it is characterised in that: the A
The top of elevation plane, the elevation plane where described B mouthfuls are located at the P where elevation plane where mouthful is located at described P mouthfuls
The lower section of elevation plane where mouthful.
7. a kind of Novel threaded plug-in rotation as described in claim 1 is straight to drive electrohydraulic servo valve, it is characterised in that: the valve
Core end cap is set in the bottom position of the central axis, and the upper of the spool main part is close in the lower end surface of the spool end cap
End face arrangement, the outer ring surface of the spool end cap and the inner wall clearance fit of the valve pocket, the spool end cap pass through circumference
The affixed spool main part of the installation screw of ring cloth.
8. a kind of Novel threaded plug-in rotation as described in claim 1 is straight to drive electrohydraulic servo valve, it is characterised in that: the valve
The convex part of the central axis of core is set with Glais ring, the corresponding position setting of the upper end cover through the position of the upper end cover
There is indent annular trench, the Glais ring is built in the inner sleeve ring-shaped groove.
9. a kind of Novel threaded plug-in rotation as described in claim 1 is straight to drive electrohydraulic servo valve, it is characterised in that: on described
For end cap by the upper end anchor ring of the affixed valve pocket of the first screw, the upper end anchor ring of the valve pocket is provided with annular groove, it is described on
First sealing ring is installed, first sealing ring is close to the correspondence contact surface of the upper end cover in annular groove.
10. a kind of Novel threaded plug-in rotation as described in claim 1 is straight to drive electrohydraulic servo valve, it is characterised in that: described
Lower cover passes through the lower end anchor ring of the affixed valve pocket of the second screw, and the lower end surface of the valve pocket is provided with annular convex platform, described
The position that the upper surface of lower cover corresponds to the annular convex platform is provided with lower annular groove, is placed with second in the lower annular groove
Sealing ring, the annular convex platform are embedded in the lower annular groove and are pressed in the upper surface of second sealing ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910057335.XA CN109578361B (en) | 2019-01-22 | 2019-01-22 | Novel screw thread cartridge formula rotatory electric liquid servo valve that directly drives |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910057335.XA CN109578361B (en) | 2019-01-22 | 2019-01-22 | Novel screw thread cartridge formula rotatory electric liquid servo valve that directly drives |
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| CN109578361A true CN109578361A (en) | 2019-04-05 |
| CN109578361B CN109578361B (en) | 2024-04-12 |
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| CN110541863A (en) * | 2019-10-11 | 2019-12-06 | 江苏钧微动力科技有限公司 | direct-insertion type rotary direct-drive electro-hydraulic servo valve |
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