CN110848420B - Jet flow shunt valve control method and shunt valve control double jet flow pipe electrohydraulic servo valve - Google Patents
Jet flow shunt valve control method and shunt valve control double jet flow pipe electrohydraulic servo valve Download PDFInfo
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- CN110848420B CN110848420B CN201911230993.0A CN201911230993A CN110848420B CN 110848420 B CN110848420 B CN 110848420B CN 201911230993 A CN201911230993 A CN 201911230993A CN 110848420 B CN110848420 B CN 110848420B
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- 230000007123 defense Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000001678 brown HT Substances 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
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Classifications
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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
- F16K11/0708—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 comprising means to avoid jamming of the slide or means to modify the flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/022—Flow-dividers; Priority valves
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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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
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Magnetically Actuated Valves (AREA)
- Servomotors (AREA)
Abstract
The invention discloses a jet flow diverter valve control method and a diverter valve control double jet flow pipe electrohydraulic servo valve.A jet flow passes through a diverter ring arranged in the middle position in a diverter valve body shell through a pressure guiding pipe and is respectively ejected from nozzles at the top ends of jet flow pipes at the left side and the right side below a diverter valve body, so that jet flow diverter output of the double jet flow pipes is formed; an oil return port is arranged in the middle of the concave on the main valve body, a valve cover with a wiring terminal is arranged outside the control valve, and the valve cover is connected with the main valve body through a screw. The invention controls the size of the double-cone annular gap through the double-cone valve core, thereby realizing the control of oil pressure and flow, and having the advantages of shorter pressure guiding pipe, strong rigidity and being not easy to be influenced by environmental vibration; the inertia of the moving part is small, and the dynamic response is faster; the feedback spring rod is not high in processing difficulty and easy to install; good anti-pollution performance, high reliability and the like. Provides a novel and high-reliability key servo element for national defense and air transportation industry.
Description
Technical Field
The invention relates to a hydraulic accessory technology, in particular to a jet flow diverter valve control method and a diverter valve control double jet flow pipe electrohydraulic servo valve.
Background
The jet pipe electrohydraulic servo valve is a core element in an electrohydraulic servo control system and is widely applied to ships, aviation, aerospace and various industrial use occasions. The typical structure of the jet pipe electrohydraulic servo valve is a force feedback two-stage jet pipe electrohydraulic servo valve, and the swing type single nozzle structure causes the jet pressure guiding pipe to be longer and lower in rigidity and is easily influenced by environmental vibration; the inertia of the moving part is large, and the dynamic response is slower; the defects of high welding processing difficulty and the like of the feedback rod assembly are difficult to solve in the current jet pipe valve development.
Disclosure of Invention
Aiming at the inherent defects of a jet pipe electrohydraulic servo valve, the invention provides a new jet flow diversion valve control method, which changes jet pipe swinging wedge diversion into double cone valve moving split ring diversion so as to realize rationality of matching structures of a servo valve front-stage double cone valve and a double jet pipe, a double jet pipe nozzle and a double jet pipe receiving hole, a feedback spring assembly and a control valve core and the like, thereby solving the inherent defects of the jet pipe electrohydraulic servo valve.
The invention adopts the following technical proposal to realize the aim. A jet flow diverter valve control method, jet flow passes the diverter ring that the middle position sets up in the diverter valve body shell through the pressure guiding tube, and then through the channel between diverter ring and bipyramid valve core installed in diverter ring, jet from the nozzle on the top of jet pipe of the left and right sides below the diverter valve body separately, thus form the jet flow diversion output of the bipyramid pipe; when the double-cone valve core moves left and right in the split ring, the left and right annular gaps formed by the channels between the double-cone valve core and the split ring change, so that the output flow of the jet pipe changes correspondingly with the left and right displacement of the double-cone valve core.
The diverter valve controlled double jet pipe electrohydraulic servo valve comprises a main valve body, a valve cover and a control valve, wherein an oil return port is arranged in the middle of a concave on the main valve body, a first jet receiving hole and a second jet receiving hole are arranged on two sides of the oil return port, an oil inlet is arranged on the outer side of the concave, the control valve is connected with the main valve body through a screw, the two ends of the control valve are connected with proportional electromagnets, and a junction box is arranged on the proportional electromagnets; the middle oil inlet above the control valve is connected with one end of the pressure guiding pipe, and the other end of the pressure guiding pipe is connected with the oil inlet; the valve cover with a wiring terminal is arranged outside the control valve and is connected with the main valve body through a screw; the bottom surface of the main valve body is provided with an oil port P, an oil port A, an oil port T and an oil port B;
The control valve comprises a rectangular valve shell, an oil inlet is formed in the middle of the upper part of the valve shell, symmetrical through holes are formed in the lower part of the valve shell, a first jet pipe with a first nozzle and a second jet pipe with a second nozzle are respectively arranged in the through holes, a circular split ring is arranged on the inner wall of the middle section of the inner cavity of the valve shell, two ends of the split ring are concave surfaces, a shaft hole is formed in the middle of the concave surfaces, the through holes are formed in the middle of the split ring and vertically crossed with the shaft hole, and a sealing oil plug is arranged in the through hole above the split ring; the inner cavity of the valve shell is provided with a double-cone valve core, the double-cone valve core is formed by connecting a middle shaft with two symmetrical cones and a straight shank connected with the outer ends of the cones, a mounting hole is arranged in the middle of the middle shaft, the conical surfaces of the two symmetrical cones are opposite, and the conical surfaces of the cones are correspondingly matched with the concave surfaces of the splitter ring; the center shaft is positioned in the shaft hole, a mounting hole on the center shaft is coaxial with the through hole of the split ring, and the mounting hole is connected with the upper end of the feedback spring rod;
The two ends of the control valve shell are connected with proportional electromagnets, the proportional electromagnets comprise a bracket, a step through hole is arranged in the middle of the bracket, and a ring groove is arranged on the periphery of the bracket; an armature is arranged in the step through hole of the bracket, one end of the armature is connected with the outer end of the straight shank, the other end of the armature is connected with the manual push rod, and the outer end of the manual push rod is connected with the end cover; a coil is arranged in the annular groove at the periphery of the bracket, a shell is wrapped outside the coil, and a junction box is arranged at the periphery of the shell;
The main valve body is cuboid, a valve cavity, a left oil duct, a right oil duct, an oil duct A, an oil duct B and a transverse oil duct are arranged in the main valve body, the transverse oil duct is communicated with the oil inlet P, the left end of the transverse oil duct is communicated with the oil duct A, and the right end of the transverse oil duct is communicated with the oil duct B; the two ends of the valve cavity are provided with internal threads, and the valve cavity is internally provided with a valve sleeve; the periphery of the main valve core is sequentially provided with a convex ring body A, a left shaft, a convex ring body B, a middle shaft, a convex ring body C, a right shaft and a convex ring body D from left to right, a blind hole is formed in the middle of the middle shaft, and sealing grooves are formed in the peripheries of the convex ring body A and the convex ring body D; the valve sleeve is sequentially provided with oil seal rings in sections from left to right, the periphery of each oil seal ring is provided with a seal groove, two adjacent oil seal rings are connected into a whole through a diaphragm, and the diaphragm from left to right of the valve sleeve is respectively provided with an oil hole A, an oil hole B, an oil hole C, an oil hole D, an oil hole E, an oil hole F and an oil hole G; the valve sleeve is internally provided with a main valve core, and an oil hole B, an oil hole C, an oil hole D, an oil hole E and an oil hole F on the valve sleeve sequentially correspond to the positions of a left shaft, a convex ring body B, an intermediate shaft, a convex ring body C and a right shaft on the main valve core; the mounting hole on the intermediate shaft of the main valve core is connected with the lower end of the feedback spring rod, and the two ends of the main valve core are provided with baffle rings; the two ends of the valve cavity are provided with inner end covers through internal threads, a reset spring is arranged between the inner end covers and the end heads of the main valve core, and a right oil chamber and a left oil chamber are formed between the inner end covers and the end heads of the main valve core; the oil return port is communicated with the oil port T through a jet flow back oil duct, the first jet flow receiving hole is communicated with the left oil chamber through a left oil duct, and the second jet flow receiving hole is communicated with the right oil chamber through a right oil duct; the oil inlet is communicated with the oil port P through a jet flow oil inlet channel; the first jet receiving hole is connected with the first nozzle, and the second jet receiving hole is connected with the second nozzle.
Further, the split ring is composed of an upper split ring and a lower split ring which are vertically symmetrical, and is fixedly connected into a whole through screws.
The invention controls the size of the double-cone annular gap through the double-cone valve core, thereby realizing the control of oil pressure and flow, and having the advantages of shorter pressure guiding pipe, strong rigidity and being not easy to be influenced by environmental vibration; the inertia of the moving part is small, and the dynamic response is faster; the feedback spring rod is not high in processing difficulty and easy to install; good anti-pollution performance, high reliability and the like. Provides a novel and high-reliability key servo element for national defense and air transportation industry.
Drawings
FIG. 1 is a schematic diagram of a jet diversion control method of the present invention;
FIG. 2 is a perspective view of the electro-hydraulic servo valve with a diverter valve controlled by a double jet pipe according to the present invention;
fig. 3 is a schematic perspective view of the installation structure of the control valve 7 and the main valve body 1 in the invention;
Fig. 4 is a perspective view of the top surface of the main valve body 1 according to the present invention;
fig. 5 is a perspective view of the bottom surface of the main valve body 1 according to the present invention;
FIG. 6 is a top plan view of the form construction of the present invention;
FIG. 7 is a cross-sectional view of the structure of the A-A direction in FIG. 6;
FIG. 8 is a view showing a sectional structure of the B-B direction in FIG. 6;
fig. 9 is a sectional view of the oil path structure of the main valve body 1 in the present invention;
fig. 10 is a structural view of the main valve body 1 of the present invention;
Fig. 11 is a perspective view of the double cone spool 26 of the present invention;
FIG. 12 is a block diagram of the valve core 16 of the present invention;
Fig. 13 is a cross-sectional view of the structure of the valve housing 15 of the present invention.
In the figure: 1.1-split valve body, 1.2-double-cone valve core, 1.3-pressure guiding pipe, 1.4-split ring, 1.5-jet pipe and 1.6-jet pipe;
the valve comprises a main valve body 1, screws 2, 9 and 254, a valve cover 3, a connecting terminal 4, a proportion electromagnet 5, a junction box 6, a control valve 7, a pressure guiding pipe 8 and a valve cavity 10;
11-valve bottom surface, 110-transverse oil duct, 111-oil port P, 112-oil port A, 113-oil port T, 114-oil port B, 115-oil duct A, 116-oil duct B;
12-end covers, 13-return springs, 14-valve sleeve baffle rings;
15-valve sleeve, 150-oil seal ring, 151-oil hole A, 152-oil hole B, 153-left 3 oil hole C, 154-oil hole D, 155-oil hole E, 156-oil hole F, 157-oil hole G, 158-seal groove and 159-diaphragm;
16-a main valve core, 161-a sealing groove, 162-a left shaft, 163-a convex ring body B, 164-a middle shaft, 165-a convex ring body C, 166-a right shaft, 167-a convex ring body D, 168-a blind hole and 169-a convex ring body A;
17-electromagnet end covers, 18-manual push rods, 19-armatures and 20-coils;
21-electromagnet housings, 211-binding posts, 22-coil brackets, 23-control valve housings, 24-sealing oil plugs;
25-split ring, 251-through hole, 252-shaft hole, 253-concave surface, 255-upper split ring and 255-lower split ring;
26-double-cone valve cores, 261-mounting holes, 262-center shafts, 263-conical surfaces and 264-straight handles;
27-first jet pipe, 28-second jet pipe, 29-second nozzle, 30-first nozzle; 31-right oil duct, 311-left oil duct, 32-feedback spring rod, 33-jet flow back oil duct, 34-jet flow inlet duct, 35-first jet flow receiving hole, 36-second jet flow receiving hole, 37-oil return port, 38-oil inlet, 39-right oil chamber, 40-left oil chamber.
Detailed Description
The invention is further described below with reference to the drawings and examples. Referring to fig. 1 to 13, in a jet flow diverter valve control method, jet flows pass through a diverter ring 1.4 arranged in the middle position in a casing of a diverter valve body 1.1 through a pressure guiding pipe 1.3, and then are ejected from nozzles at the top ends of jet pipes 1.5 and 1.6 at the left side and the right side below the diverter valve body 1.1 respectively through a channel between the diverter ring 1.4 and a double-cone valve core 1.2 arranged in the diverter ring 1.4, so that jet flow diverter output of the double-jet pipes 1.5 and 1.6 is formed; when the double-cone valve core 1.2 moves left and right in the split ring 1.4, left and right annular gaps formed by the channels between the double-cone valve core 1.2 and the split ring 1.4 change, so that output flow of jet pipes 1.5 and 1.6 correspondingly changes along with left and right displacement of the double-cone valve core 1.2.
The split valve control double jet pipe electrohydraulic servo valve comprises a main valve body 1, a valve cover 3 and a control valve 7, wherein an oil return port 37 is arranged in the middle of a concave on the main valve body 1, a first jet receiving hole 35 and a second jet receiving hole 36 are arranged on two sides of the oil return port 37, an oil inlet 38 is arranged on the outer side of the concave, the control valve 7 is connected with the main valve body 1 through a screw 9, the two ends of the control valve 7 are connected with proportional electromagnets 5, and junction boxes 6 are arranged on the proportional electromagnets 5; the middle oil inlet above the control valve 7 is connected with one end of the pressure guiding pipe 8, and the other end of the pressure guiding pipe 8 is connected with the oil inlet 38; the valve cover 3 with the wiring terminal 4 is arranged outside the control valve 7, and the valve cover 3 is connected with the main valve body 1 through the screw 2; the valve bottom surface 11 of the main valve body 1 is provided with an oil port P111, an oil port A112, an oil port T113 and an oil port B114;
The control valve 7 comprises a rectangular valve housing 23, an oil inlet is arranged in the middle of the upper part of the valve housing 23, symmetrical through holes are arranged below the valve housing, a first jet pipe 27 with a first nozzle 30 and a second jet pipe 28 with a second nozzle 29 are respectively arranged in the through holes, a circular split ring 25 is arranged on the inner wall of the middle section of the inner cavity of the valve housing 23, the split ring 25 is composed of an upper split ring 255 and a lower split ring 256 which are symmetrical up and down, and the split rings are fixedly connected into a whole through screws 254. Concave surfaces 253 are arranged at two ends of the split ring 25, an axle hole 252 is arranged in the middle of the concave surfaces 253, a through hole 251 is arranged in the middle of the split ring 25, the through hole 251 vertically crosses the axle hole 252, and a sealing oil plug 24 is arranged in the through hole above the split ring 25; the inner cavity of the valve shell 23 is provided with a double-cone valve core 26, the double-cone valve core 26 is formed by connecting a middle shaft 262 with two symmetrical cones 263 and a straight handle 264 connected with the outer ends of the cones 263, a mounting hole 261 is arranged in the middle of the middle shaft 262, the conical surfaces of the two symmetrical cones 263 are opposite, and the conical surfaces of the cones 263 are correspondingly matched with the concave surface 253 of the splitter ring 25; the middle shaft 262 is positioned in the shaft hole 252, a mounting hole 261 on the middle shaft 262 is coaxial with the through hole 251 of the splitter ring 25, and the mounting hole 261 is connected with the upper end of the feedback spring rod 32;
The two ends of the control valve shell 23 are connected with proportional electromagnets 5, the proportional electromagnets 5 comprise a bracket 22, a step through hole is arranged in the middle of the bracket 22, and a ring groove is arranged on the periphery of the bracket; an armature 19 is arranged in the step through hole of the bracket 22, one end of the armature 19 is connected with the outer end of the straight shank 264, the other end of the armature is connected with the manual push rod 18, and the outer end of the manual push rod 18 is connected with the end cover 17; a coil 20 is arranged in a ring groove at the periphery of the bracket 22, a shell 21 is wrapped outside the coil 20, and a junction box 6 is arranged at the periphery of the shell 21;
The main valve body 1 is a cuboid, the main valve body 1 is internally provided with a valve cavity 10, a left oil duct 311, a right oil duct 31, an oil duct A115, an oil duct B116 and a transverse oil duct 110, the transverse oil duct 110 is communicated with an oil inlet P111, the left end of the transverse oil duct 110 is communicated with the oil duct A115, and the right end of the transverse oil duct 110 is communicated with the oil duct B116; the two ends of the valve cavity 10 are provided with internal threads, and the valve cavity 10 is internally provided with a valve sleeve 15; the outer periphery of the main valve core 16 is provided with a convex ring body A169, a left shaft 162, a convex ring body B163, an intermediate shaft 164, a convex ring body C165, a right shaft 166 and a convex ring body D167 in sequence from left to right, a blind hole 168 is arranged in the middle of the intermediate shaft 164, and sealing grooves 161 are respectively arranged on the outer periphery of the convex ring body A169 and the convex ring body D167; the valve sleeve 15 is sequentially provided with oil seal rings 150 in sections from left to right, the periphery of each oil seal ring 150 is provided with a seal groove 158, two adjacent oil seal rings 150 are connected into a whole through a diaphragm 159, and the diaphragms 159 of the valve sleeve 15 from left to right are respectively provided with an oil hole A151, an oil hole B152, an oil hole C153, an oil hole D154, an oil hole E155, an oil hole F156 and an oil hole G157; the main valve core 16 is arranged in the valve sleeve 15, and an oil hole B152, an oil hole C153, an oil hole D154, an oil hole E155 and an oil hole F156 on the valve sleeve 15 sequentially correspond to the positions of a left shaft 162, a convex ring body B163, an intermediate shaft 164, a convex ring body C165 and a right shaft 166 on the main valve core 16; a mounting hole 168 on the intermediate shaft 164 of the main valve core 16 is connected with the lower end of the feedback spring rod 32, and two ends of the main valve core 16 are provided with baffle rings 14; the two ends of the valve cavity 10 are provided with inner end covers 12 through internal threads, a return spring 13 is arranged between the inner end covers 12 and the end heads of the main valve core 16, and a right oil chamber 39 and a left oil chamber 40 are formed between the inner end covers 12 and the end heads of the main valve core 16; the oil return port 37 communicates with the oil port T113 through the jet flow back oil passage 33, the first jet flow receiving hole 35 communicates with the left oil chamber 40 through the left oil passage 311, and the second jet flow receiving hole 36 communicates with the right oil chamber 39 through the right oil passage 31; the oil inlet 38 is communicated with the oil port P111 through the jet oil inlet duct 34; the first jet receiving hole 35 is connected to the first nozzle 30, and the second jet receiving hole 36 is connected to the second nozzle 29.
Examples: in the invention, the main valve body 1 and the valve housing 23 are made of high-quality steel No. 30; the main valve core 16, the double-cone valve core 26 and the splitter ring 25 are all 40Cr; the valve sleeve cover 3, the end cover 12 and the baffle ring 14 adopt carbon steel ZG25; the valve sleeve 15 is made of polytetrafluoroethylene; the model number of the proportion electromagnet 5 is GP516-S-A; the sealing member is made of NBR nitrile rubber; the return spring 13 is made of 70 steel. The main valve body 1 and the valve housing 23 are mainly machined on a numerical control milling machine; the main valve core 16, the double-cone valve core 26 and the split ring 25 are mainly completed by numerical control vehicles.
When the control valve 7 is installed, the upper split ring 255 and the lower split ring 256 are aligned and sleeved on the double-cone valve core middle shaft 262, the upper split ring 255 and the lower split ring 256 are fixed by the screw 254, and then the double-cone valve core 26 and the split ring 25 assembly and the valve core hole of the control valve shell 23 are installed coaxially and symmetrically. The through hole 251, the mounting hole 261 and the oil inlet hole three holes above the valve housing 23 are coaxial, the upper split ring 255 is above, and the lower split ring 256 is below.
The sequence of installation of main spool 16: the valve sleeve 15 is symmetrically arranged in the valve cavity 10, and two ends of the valve sleeve 15 are positioned and fixed by the valve sleeve baffle rings 14. The main valve core 16 is then installed in the hole of the valve sleeve 15, and the installation hole 261 in the middle position of the main valve core 16 is coaxial with the jet-back oil duct 33 in the main valve body 1. Oil hole B152 corresponds to the position of left shaft 162, oil hole C153 corresponds to the position of collar body B163, oil hole D154 corresponds to the position of intermediate shaft 164, oil hole E155 corresponds to the position of collar body C165, and oil hole F156 corresponds to the position of right shaft 166.
The control valve 7 and main valve body 1 are partially assembled in sequence: the feedback spring rod 32 is inserted into the middle mounting hole 168 of the main valve core 16 through the jet oil return channel 32 in the main valve body 1. The lower end of the feedback spring rod 32 is fixedly connected with a mounting hole 168 in the middle of the main valve core 16 by threads. And then the installed control valve 7 is placed on the upper surface of the main valve body 1, the upper end of the feedback spring rod 32 is inserted into the mounting hole 261 of the double-cone valve core 26, and the upper end of the feedback spring rod 32 is fixed with the mounting hole 261 by a nut. The holes 261 and 168 are coaxial when mounted. The first jet receiving hole 35 is connected to the first nozzle 30, and the second jet receiving hole 36 is connected to the second nozzle 29. The sealing oil plug 24 is then fitted into the through hole 251 of the upper split ring 255.
One end of the pressure guiding pipe 8 is fixedly connected with an oil inlet hole on the upper surface of the control valve shell 23 through a pipeline joint, and the other end of the pressure guiding pipe 8 is fixedly connected with an oil inlet 38 on the upper surface of the main valve body 1 through a pipeline joint.
The proportional electromagnet 5 is arranged on the upper surface of the main valve body 1, the stepped through hole of the bracket 22 is coaxial with the valve core hole of the control valve shell 23, and the armature 19 is connected with the double-cone valve core 26. The mounting side of the bracket 22 is fixedly connected with the side of the control valve housing 23 by screws. The installation process of the proportional electromagnet 5 on the other side of the control valve 7 is the same as the above-described installation process.
Finally, installing the valve cover 3, fixedly connecting the wiring terminal 4 at the outer side installation position of the valve cover 3 by using a screw, connecting the wiring terminal 211 of the wiring box 6 with a terminal positioned at the inner side of the valve cover 3 by using a wiring terminal 4, and finally fixedly connecting the valve cover 3 at the upper surface of the main valve body 1 by using the screw 2.
The working process of the flow dividing valve controlled double jet pipe electrohydraulic servo valve is realized by the joint control of a control valve 7 and a main valve body 1. The control scheme adopts two-stage control:
The first stage is a control stage (pilot stage), and the control circuit consists of jet flow inlet duct 34, pressure guiding pipe 8, control valve 7, first jet flow pipe 27, second jet flow pipe 28, second nozzle 29, first nozzle 30, first jet flow receiving hole 35, second jet flow receiving hole 36, right and left oil ducts 31 and 311, and left and right oil chambers 40 and 39. The control oil is introduced from the oil port P111, enters the jet flow oil inlet passage 34 through the transverse oil passage 110, and enters the control valve 7 through the pressure guiding pipe 8. The oil liquid is divided into left and right jet flows after passing through the double-cone annular gap of the control valve 7. Left Lu Sheliu is ejected from the first nozzle 30 through the first jet pipe 27, then enters the first jet receiving hole 35, passes through the left oil duct 311 and then enters the left oil chamber 40 through the oil hole A151 of the valve sleeve 15, and the pressure oil generates rightward hydraulic pressure on the main valve core 16; the right jet is ejected from the second nozzle 29 through the second jet pipe 28, enters the second jet receiving hole 36, passes through the right oil duct 31, then enters the right oil chamber 39 through the oil hole G157 of the valve sleeve 15, and the pressure oil generates leftward hydraulic pressure to the main valve core 16.
When the annular gap on the left side of the control valve 7 is increased, the left jet pressure and the flow are increased, the right jet pressure and the flow are reduced, the volume of the left oil chamber 40 is increased, the volume of the right oil chamber 39 is reduced, and the working conditions of oil feeding of the left oil chamber 40 and oil returning of the right oil chamber 39 are formed. The oil in the right oil chamber 39 flows out reversely through the right oil passage 31, enters the jet oil return passage 33 through the oil return port 37, passes through the oil hole D154 of the valve housing 15, and flows out from the oil port T113. Similarly, when the annular gap on the right side in the control valve 7 is increased, the pressure and flow of the right jet flow are increased, the pressure and flow of the left jet flow are reduced, the volume of the right oil chamber 39 is increased, the volume of the left oil chamber 40 is reduced, and the working conditions of oil feeding of the right oil chamber 39 and oil returning of the left oil chamber 40 are formed. The oil in the left oil chamber 40 flows out reversely through the left oil passage 311, enters the jet oil return passage 33 through the oil return port 37, passes through the oil hole D154 of the valve housing 15, and flows out from the oil port T113.
The second stage is the main valve stage (power stage). The valve bottom surface 11 of the main valve body 1 is provided with an oil port P111, an oil port a112, an oil port T113, and an oil port B114. The oil enters from the oil port P111 and is divided into a left path and a right path after passing through the transverse oil duct 110. Left oil enters the oil duct A115 leftwards, and flows out of the oil port A112 through an annular gap between the valve sleeve 15 and the left side of the convex ring body B163; right oil enters the oil duct A116 rightwards, and flows out of the oil port B114 through an annular gap between the valve sleeve 15 and the right side of the convex ring body C165.
The control process comprises the following steps: when the current of the left proportion electromagnet 5 is increased, the proportion of magnetic force generated by an electrified coil of the left proportion electromagnet is increased, an armature 19 in the electromagnet 5 moves rightwards to push a biconical valve core 26 to move rightwards, and under the action of a fixed split ring 25, a left annular gap is reduced, and a right annular gap is increased. The flow rate and pressure of the first jet pipe 27 are reduced, and the flow rate and pressure of the second jet pipe 28 are increased. The pressure in the right oil chamber 39 increases, the pressure in the left oil chamber 40 decreases, and the main valve spool 16 moves leftwards, so that the flow output of the main valve oil port B114 increases, and the flow output of the oil port A112 decreases. During leftward movement of main spool 16, its displacement is fed back to the middle of double cone spool 26 via feedback spring lever 32. Under the spring force of the feedback spring rod 32, the double cone spool 26 is returned to the left, the pressure and flow in the first jet pipe 27 are increased, the pressure and flow in the second jet pipe 28 are reduced, and finally the main spool 16 is returned to the right to the middle position.
When the current of the proportional electromagnet 5 on the right increases, the process of the combined control of the double-cone spool 26 and the main spool 16 is reversed from the above process.
In the working process, the displacement of the double-cone valve core 26 is changed in proportion to the current of the proportional electromagnet 5, and the displacement of the main valve core 16 is also changed in proportion to the current of the proportional electromagnet 5 under the action of the spring force of the feedback spring rod 32, so that a main valve core displacement and spring force feedback loop is formed.
The invention realizes the proportional change of jet pressure and flow and electromagnet input current by controlling the size of the biconical annular gap through the biconical valve core, and finally realizes the proportional change of the displacement of the main valve core 16 and the input current of the proportional electromagnet 5. Has the following outstanding advantages: the pressure guiding pipe 8 is fixed in position, easy to install and not easy to be influenced by environmental vibration; the first jet pipe 27 and the second jet pipe 28 are short and fixed in position, and have high rigidity and are not easily influenced by environmental vibration; the double-cone valve core 26 has small inertia and quick dynamic response; the feedback spring rod 32 is of a straight rod structure, so that the processing difficulty is low, and the installation is easy; the first and second jet pipes 27, 28 are short in distance from the first and second nozzles 30, 29, and have good anti-pollution performance and high reliability. Can provide a novel and high-reliability key servo element for national defense and air transportation industry.
Claims (2)
1. The split valve controlled double jet pipe electrohydraulic servo valve comprises a main valve body, a valve cover and a control valve, and is characterized in that an oil return port is arranged in the middle of a concave on the main valve body, a first jet receiving hole and a second jet receiving hole are arranged on two sides of the oil return port, an oil inlet is arranged on the outer side of the concave, the control valve is connected with the main valve body through a screw, proportional electromagnets are connected to the two ends of the control valve, and a junction box is arranged on the proportional electromagnets; the middle oil inlet above the control valve is connected with one end of the pressure guiding pipe, and the other end of the pressure guiding pipe is connected with the oil inlet; the valve cover with a wiring terminal is arranged outside the control valve and is connected with the main valve body through a screw; the bottom surface of the main valve body is provided with an oil port P, an oil port A, an oil port T and an oil port B;
The control valve comprises a rectangular valve shell, an oil inlet is formed in the middle of the upper part of the valve shell, symmetrical through holes are formed in the lower part of the valve shell, a first jet pipe with a first nozzle and a second jet pipe with a second nozzle are respectively arranged in the through holes, a circular split ring is arranged on the inner wall of the middle section of the inner cavity of the valve shell, two ends of the split ring are concave surfaces, a shaft hole is formed in the middle of the concave surfaces, the through holes are formed in the middle of the split ring and vertically crossed with the shaft hole, and a sealing oil plug is arranged in the through hole above the split ring; the inner cavity of the valve shell is provided with a double-cone valve core, the double-cone valve core is formed by connecting a middle shaft with two symmetrical cones and a straight shank connected with the outer ends of the cones, a mounting hole is arranged in the middle of the middle shaft, the conical surfaces of the two symmetrical cones are opposite, and the conical surfaces of the cones are correspondingly matched with the concave surfaces of the splitter ring; the center shaft is positioned in the shaft hole, a mounting hole on the center shaft is coaxial with the through hole of the split ring, and the mounting hole is connected with the upper end of the feedback spring rod;
The two ends of the control valve shell are connected with proportional electromagnets, the proportional electromagnets comprise a bracket, a step through hole is arranged in the middle of the bracket, and a ring groove is arranged on the periphery of the bracket; an armature is arranged in the step through hole of the bracket, one end of the armature is connected with the outer end of the straight shank, the other end of the armature is connected with the manual push rod, and the outer end of the manual push rod is connected with the end cover; a coil is arranged in the annular groove at the periphery of the bracket, a shell is wrapped outside the coil, and a junction box is arranged at the periphery of the shell;
the main valve body is cuboid, a valve cavity, a left oil duct, a right oil duct, an oil duct A, an oil duct B and a transverse oil duct are arranged in the main valve body, the transverse oil duct is communicated with the oil inlet P, the left end of the transverse oil duct is communicated with the oil duct A, and the right end of the transverse oil duct is communicated with the oil duct B; the two ends of the valve cavity are provided with internal threads, and the valve cavity is internally provided with a valve sleeve; the valve sleeve is sequentially provided with oil seal rings in sections from left to right, the periphery of each oil seal ring is provided with a seal groove, two adjacent oil seal rings are connected into a whole through a diaphragm, and the diaphragm from left to right of the valve sleeve is respectively provided with an oil hole A, an oil hole B, an oil hole C, an oil hole D, an oil hole E, an oil hole F and an oil hole G; a main valve core is arranged in the valve sleeve, the periphery of the main valve core is sequentially provided with a convex ring body A, a left shaft, a convex ring body B, a middle shaft, a convex ring body C, a right shaft and a convex ring body D from left to right, a blind hole is formed in the middle of the middle shaft, and sealing grooves are formed in the peripheries of the convex ring body A and the convex ring body D; the oil hole B, the oil hole C, the oil hole D, the oil hole E and the oil hole F on the valve sleeve sequentially correspond to the positions of the left shaft, the convex ring body B, the middle shaft, the convex ring body C and the right shaft on the main valve core; the mounting hole on the intermediate shaft of the main valve core is connected with the lower end of the feedback spring rod, and the two ends of the main valve core are provided with baffle rings; the two ends of the valve cavity are provided with inner end covers through internal threads, a reset spring is arranged between the inner end covers and the end heads of the main valve core, and a right oil chamber and a left oil chamber are formed between the inner end covers and the end heads of the main valve core; the oil return port is communicated with the oil port T through a jet flow back oil duct, the first jet flow receiving hole is communicated with the left oil chamber through a left oil duct, and the second jet flow receiving hole is communicated with the right oil chamber through a right oil duct; the oil inlet is communicated with the oil port P through a jet flow oil inlet channel; the first jet receiving hole is connected with the first nozzle, and the second jet receiving hole is connected with the second nozzle.
2. The split valve controlled double jet pipe electrohydraulic servo valve of claim 1 wherein said split ring is comprised of an upper split ring and a lower split ring which are vertically symmetrical and are fixedly connected as a unit by screws.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911230993.0A CN110848420B (en) | 2019-12-05 | 2019-12-05 | Jet flow shunt valve control method and shunt valve control double jet flow pipe electrohydraulic servo valve |
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| CN201911230993.0A CN110848420B (en) | 2019-12-05 | 2019-12-05 | Jet flow shunt valve control method and shunt valve control double jet flow pipe electrohydraulic servo valve |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203239998U (en) * | 2012-12-05 | 2013-10-16 | 昆明理工大学 | Water-based hydraulic symmetric electrostrictive type high-speed on-off valve |
| CN104696302A (en) * | 2015-03-16 | 2015-06-10 | 武汉科技大学 | High-linearity force feedback jet pipe type electro-hydraulic servo valve |
| CN211145447U (en) * | 2019-12-05 | 2020-07-31 | 九江学院 | Shunt valve controlled double-jet pipe electro-hydraulic servo valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL50755C (en) * | 1939-11-27 | 1941-03-15 | ||
| GB1488711A (en) * | 1973-09-26 | 1977-10-12 | Nihon Spindle Mfg Co Ltd | Hydraulic valve |
| US9709177B2 (en) * | 2015-01-13 | 2017-07-18 | Honeywell International Inc. | Two-position, two-stage servo valve |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203239998U (en) * | 2012-12-05 | 2013-10-16 | 昆明理工大学 | Water-based hydraulic symmetric electrostrictive type high-speed on-off valve |
| CN104696302A (en) * | 2015-03-16 | 2015-06-10 | 武汉科技大学 | High-linearity force feedback jet pipe type electro-hydraulic servo valve |
| CN211145447U (en) * | 2019-12-05 | 2020-07-31 | 九江学院 | Shunt valve controlled double-jet pipe electro-hydraulic servo valve |
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