CN110848420A - Method for controlling jet flow splitter valve and dual-jet-pipe electro-hydraulic servo valve controlled by splitter valve - Google Patents
Method for controlling jet flow splitter valve and dual-jet-pipe electro-hydraulic servo valve controlled by splitter valve Download PDFInfo
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- CN110848420A CN110848420A CN201911230993.0A CN201911230993A CN110848420A CN 110848420 A CN110848420 A CN 110848420A CN 201911230993 A CN201911230993 A CN 201911230993A CN 110848420 A CN110848420 A CN 110848420A
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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 method for controlling a jet flow shunt valve and a dual-jet-pipe electro-hydraulic servo valve controlled by the shunt valve.A jet flow passes through a split ring arranged at the middle position in a shell of the shunt valve body through a pressure-drawing pipe and is respectively ejected from nozzles at the top ends of the jet pipes on the left side and the right side below the shunt valve body, so that jet flow shunt output of the dual-jet-pipe is formed; the middle of the concave slot on the main valve body is provided with an oil return port, the control valve is externally provided with a valve cover with a wiring terminal, and the valve cover is connected with the main valve body through a screw. The double-cone annular gap is controlled by the double-cone valve core, so that the control of the oil pressure and the flow is realized, and the pressure guiding pipe is shorter, has strong rigidity and is not easily influenced by environmental vibration; the inertia of the moving part is small, and the dynamic response is fast; the feedback spring rod has low processing difficulty and is easy to install; good pollution resistance, high reliability and the like. The novel high-reliability key servo element is provided for national defense and air transportation industries in China.
Description
Technical Field
The invention relates to a hydraulic accessory technology, in particular to a method for controlling a jet flow shunt valve and a dual-jet pipe electro-hydraulic servo valve controlled by the shunt valve.
Background
The jet pipe electro-hydraulic servo valve is a core element in an electro-hydraulic servo control system, and is widely applied to ships, aviation, aerospace and various industrial use occasions. The typical structure of the jet pipe electro-hydraulic servo valve is a force feedback two-stage jet pipe electro-hydraulic servo valve, and the oscillating single-nozzle structure causes that a jet flow pressure leading pipe is 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 slow; the defects of high welding processing difficulty and the like of the feedback rod assembly are difficult to solve in the current development of the jet pipe valve.
Disclosure of Invention
The invention provides a new method for controlling a jet flow shunt valve, aiming at the inherent defects of a jet pipe electro-hydraulic servo valve, which changes the swinging wedge shunt of a jet pipe into the moving wedge ring shunt of a double cone valve so as to realize the rationality of matching structures of a front-stage double cone valve of a servo valve and a double jet pipe, a nozzle of the double jet pipe and a double jet receiving hole, a feedback spring assembly, a control valve core and the like, and solve the inherent defects of the jet pipe electro-hydraulic servo valve.
The invention adopts the following technical scheme to achieve the purpose. A jet flow splitter valve control method, the jet flow crosses the splitter ring that the middle position sets up in the body shell of the splitter valve through the pressure-drawing tube, and then through the channel between splitter ring and bipyramid valve core mounted in splitter ring, jet out from the spray nozzle on the top of jet pipe on the left and right sides below the splitter valve separately, thus form the split stream output of the jet flow of the pair of jet pipes; when the double-cone valve core moves left and right in the splitter ring, the left and right annular gaps formed by the channels between the double-cone valve core and the splitter ring change, so that the output flow of the jet pipe generates corresponding jet flow change along with the left and right displacement of the double-cone valve core.
A shunt valve controlled double-jet pipe electro-hydraulic 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 groove in the main valve body, a first jet receiving hole and a second jet receiving hole are formed in two sides of the oil return port, an oil inlet is formed in the outer side of the concave groove, the control valve is connected with the main valve body through screws, proportional electromagnets are connected to 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 a pressure guiding pipe, and the other end of the pressure guiding pipe is connected with the oil inlet; the control valve is externally provided with a valve cover with a connecting terminal, and the valve cover is connected with the main valve body through a screw; an oil port P, an oil port A, an oil port T and an oil port B are arranged on the valve bottom surface of the main valve body;
the control valve comprises a rectangular valve shell, an oil inlet hole is formed in the middle of the upper portion of the valve shell, symmetrical through holes are formed in the lower portion of the valve shell, a first jet pipe with a first nozzle and a second jet pipe with a second nozzle are respectively installed in the through holes, a circular split ring is installed on the inner wall of the middle section of the inner cavity of the valve shell, concave surfaces are formed in two ends of the split ring, a shaft hole is formed in the middle of each concave surface, a through hole is formed in the middle of the split ring, the through holes are vertically crossed with the shaft holes, and a sealing oil plug is installed in each through hole above the split; 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, the middle of the middle shaft is provided with a mounting hole, 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 split rings; the middle shaft is positioned in the shaft hole, a mounting hole in the middle shaft and the through hole of the split ring are coaxial, and the mounting hole is connected with the upper end of the feedback spring rod;
the proportional electromagnet comprises 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 a step through hole of the bracket, one end of the armature is connected with the outer end of the straight handle, the other end of the armature is connected with a 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 a 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; internal threads are arranged at two ends of the valve cavity, and a valve sleeve is arranged in the valve cavity; the periphery of the main valve core is sequentially provided with a convex ring body A, a left shaft, a convex ring body B, an intermediate 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 intermediate 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 a segmented manner 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 of the valve sleeve from left to right 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 installed in the valve sleeve, 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 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 middle shaft of the main valve core is connected with the lower end of the feedback spring rod, and two ends of the main valve core are provided with baffle rings; inner end covers are mounted at two ends of the valve cavity through internal threads, a return spring is mounted between each inner end cover and the end head of the main valve core, and a right oil chamber and a left oil chamber are formed between each inner end cover and the end head of the main valve core; the oil return port is communicated with the oil port T through a jet flow oil return channel, 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 aperture is connected to the first nozzle and the second jet receiving aperture is connected to the second nozzle.
Furthermore, the split ring is composed of an upper split ring and a lower split ring which are symmetrical up and down, and is fixedly connected into a whole by a screw.
The double-cone annular gap is controlled by the double-cone valve core, so that the control of the oil pressure and the flow is realized, and the pressure guiding pipe is shorter, has strong rigidity and is not easily influenced by environmental vibration; the inertia of the moving part is small, and the dynamic response is fast; the feedback spring rod has low processing difficulty and is easy to install; good pollution resistance, high reliability and the like. The novel high-reliability key servo element is provided for national defense and air transportation industries in China.
Drawings
FIG. 1 is a schematic diagram of the fluidic control method of the present invention;
FIG. 2 is a three-dimensional structure diagram of the appearance of the shunt valve controlled double-jet pipe electro-hydraulic servo valve of the invention;
FIG. 3 is a perspective view of the installation structure of the control valve 7 and the main valve body 1 according to the present invention;
FIG. 4 is a top perspective view of the main valve body 1 according to the present invention;
FIG. 5 is a bottom perspective view of the main valve body 1 according to the present invention;
FIG. 6 is a top view of the form construction of the present invention; FIG. 7 is a sectional view taken along the line A-A in FIG. 6;
FIG. 8 is a sectional view taken along line B-B of FIG. 6; fig. 9 is a sectional view showing an oil passage structure of the main valve body 1 in the present invention;
FIG. 10 is a perspective view of split ring 25 of the present invention; FIG. 11 is a perspective view of the dual cone valve cartridge 26 of the present invention;
FIG. 12 is a view showing the construction of the valve body 16 according to the present invention; fig. 13 is a sectional view showing the structure of the valve sleeve 15 according to the present invention;
in the figure: 1.1-a flow splitting valve body, 1.2-a double-cone valve core, 1.3-a pressure guiding pipe, 1.4-a flow splitting ring and 1.5 and 1.6-a jet pipe;
1-a main valve body, 2, 9, 254-a screw, 3-a valve cover, 4-a wiring terminal, 5-a proportional electromagnet, 6-a junction box, 7-a control valve, 8-a pressure guiding pipe and 10-a valve cavity;
11-valve bottom, 110-transverse oil channel, 111-port P, 112-port a, 113-port T, 114-port B, 115-oil channel a, 116-oil channel B;
12-end cover, 13-return spring, 14-valve sleeve retaining ring;
15-a valve sleeve, 150-an oil seal ring, 151-an oil hole A, 152-an oil hole B, 153-a left 3 oil hole C, 154-an oil hole D, 155-an oil hole E, 156-an oil hole F, 157-an oil hole G, 158-a seal groove, 159-a diaphragm;
16-main valve core, 161-seal groove, 162-left shaft, 163-convex ring body B, 164-middle shaft, 165-convex ring body C, 166-right shaft, 167-convex ring body D, 168-blind hole and 169-convex ring body A;
17-electromagnet end cover, 18-manual push rod, 19-armature and 20-coil;
21-electromagnet housing, 211-terminal, 22-coil support, 23-control valve housing, 24-sealing oil plug;
25-split ring, 251-through hole, 252-shaft hole, 253-concave surface, 255-upper split ring and 255-lower split ring;
26-a double-cone valve core, 261-an installation hole, 262-a middle shaft, 263-a conical surface and 264-a straight shank;
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 oil return duct, 34-jet flow oil inlet duct, 35-first jet flow receiving hole, 36-second jet flow receiving hole, 37-oil return opening, 38-oil inlet, 39-right oil chamber and 40-left oil chamber.
Detailed Description
The invention is further illustrated by the following figures and examples. Referring to fig. 1 to 13, a method for controlling a jet flow split-flow valve, wherein a jet flow passes through a split ring 1.4 arranged at the middle position in a housing of a split-flow valve body 1.1 through a pressure-leading pipe 1.3, and then is ejected from nozzles at the top ends of jet pipes 1.5 and 1.6 at the left and right sides below the split-flow valve body 1.1 through a channel between the split ring 1.4 and a double-cone valve core 1.2 arranged in the split ring 1.4, so as to form jet flow split-flow output of double jet pipes 1.5 and 1.6; when the double-cone valve core 1.2 moves left and right in the splitter ring 1.4, the left and right annular gaps formed by the channel between the double-cone valve core 1.2 and the splitter ring 1.4 change, so that the output flow of the jet pipes 1.5 and 1.6 changes correspondingly with the left and right displacement of the double-cone valve core 1.2.
A shunt valve controlled double-jet pipe electro-hydraulic 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 groove 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 groove, the control valve 7 is connected with the main valve body 1 through a screw 9, two ends of the control valve 7 are connected with a proportional electromagnet 5, and a junction box 6 is arranged on the proportional electromagnet 5; a 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; a valve cover 3 with a wiring terminal 4 is arranged outside the control valve 7, and the valve cover 3 is connected with the main valve body 1 through a 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 shell 23, an oil inlet hole is formed in the middle of the upper portion of the valve shell 23, a symmetrical through hole is formed in the lower portion of the valve shell, a first jet pipe 27 with a first nozzle 30 and a second jet pipe 28 with a second nozzle 29 are respectively installed in the through hole, a split ring 25 in the shape of a circular ring is installed on the inner wall of the middle section of the inner cavity of the valve shell 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 ring is fixedly connected into a whole through screws 254. The two ends of the split ring 25 are concave surfaces 253, a shaft hole 252 is formed in the middle of the concave surfaces 253, a through hole 251 is formed in the middle of the split ring 25, the through hole 251 is vertically crossed with the shaft 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 composed of a central shaft 262 connected with two symmetrical cones 263 and a straight shank 264 connected with the outer ends of the cones 263, the middle of the central shaft 262 is provided with a mounting hole 261, the conical surfaces of the two symmetrical cones 263 are opposite, and the conical surface of the cone 263 is correspondingly matched with the concave surface 253 of the split ring 25; the middle shaft 262 is positioned in the shaft hole 252, the 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, each proportional electromagnet 5 comprises a support 22, a step through hole is formed in the middle of the inside of each support 22, and a ring groove is formed in the periphery of each support 22; an armature 19 is arranged in a 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 19 is connected with a 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, a valve cavity 10, a left oil channel 311, a right oil channel 31, an oil channel A115, an oil channel B116 and a transverse oil channel 110 are arranged in the main valve body 1, the transverse oil channel 110 is communicated with an oil inlet P111, the left end of the transverse oil channel 110 is communicated with the oil channel A115, and the right end of the transverse oil channel 110 is communicated with the oil channel B116; internal threads are arranged at two ends of the valve cavity 10, and a valve sleeve 15 is arranged in the valve cavity 10; the periphery of the main valve core 16 is sequentially provided with a convex ring body A169, a left shaft 162, a convex ring body B163, a middle shaft 164, a convex ring body C165, a right shaft 166 and a convex ring body D167 from left to right, the middle of the middle shaft 164 is provided with a blind hole 168, and the peripheries of the convex ring body A169 and the convex ring body D167 are provided with sealing grooves 161; the valve sleeve 15 is sequentially provided with oil seal rings 150 in a segmented manner 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 diaphragm 159 from left to right of the valve sleeve 15 is 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 installed in the valve sleeve 15, and the oil hole B152, the oil hole C153, the oil hole D154, the oil hole E155 and the oil hole F156 on the valve sleeve 15 correspond to the left shaft 162, the convex ring body B163, the intermediate shaft 164, the convex ring body C165 and the right shaft 166 on the main valve core 16 in sequence; a mounting hole 168 on the intermediate shaft 164 of the main valve element 16 is connected with the lower end of the feedback spring rod 32, and stop rings 14 are arranged at two ends of the main valve element 16; inner end covers 12 are mounted at two ends of the valve cavity 10 through internal threads, a return spring 13 is mounted between each inner end cover 12 and the end head of the main valve element 16, and a right oil chamber 39 and a left oil chamber 40 are formed between each inner end cover 12 and the end head of the main valve element 16; the oil return port 37 is communicated with the oil port T113 through the jet oil return passage 33, the first jet receiving hole 35 is communicated with the left oil chamber 40 through the left oil passage 311, and the second jet receiving hole 36 is communicated 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 flow oil inlet passage 34; the first jet receiving aperture 35 is connected to the first nozzle 30 and the second jet receiving aperture 36 is connected to the second nozzle 29.
Example (b): the main valve body 1 and the valve shell 23 adopt high-quality steel 30 #; the main valve core 16, the double-cone valve core 26 and the split ring 25 are all made of 40 Cr; the valve cover 3, the end cover 12 and the baffle ring 14 of the valve sleeve are made of carbon steel ZG 25; the valve sleeve 15 is made of polytetrafluoroethylene; the type of the proportional electromagnet 5 is GP 516-S-A; the sealing element material is NBR butadiene acrylonitrile rubber; the return spring 13 is made of 70 steel. The main valve body 1 and the valve shell 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 a numerical control lathe.
When the control valve 7 is installed, the upper split ring 255 and the lower split ring 256 are firstly sleeved on the double-cone valve core middle shaft 262 in an aligned mode, the two parts of the upper split ring 255 and the lower split ring 256 are fixed through the screw 254, and then the double-cone valve core 26 and the split ring 25 are coaxially and symmetrically installed with the valve core hole of the control valve shell 23. The through hole 251, the mounting hole 261, and three holes of the oil inlet above the valve housing 23 are coaxial, the upper split ring 255 is above, and the lower split ring 256 is below.
The control valve 7 is partially installed with the main valve body 1 in the following order: the feedback spring rod 32 is inserted into the central mounting hole 168 of the main valve 16 through the jet return passage 32 in the main valve body 1. The lower end of feedback spring stem 32 is threadably secured to mounting bore 168 in the middle of main poppet 16. 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 installation hole 261 of the double-cone valve core 26, and the upper end of the feedback spring rod 32 is fixed with the installation hole 261 by a nut. When installed, the holes 261, 168 are coaxial. The first jet receiving aperture 35 is connected to the first nozzle 30 and the second jet receiving aperture 36 is connected to the second nozzle 29. The sealing oil plug 24 is then installed 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 by 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 by a pipeline joint.
The proportional electromagnet 5 is placed on the upper surface of the main valve body 1, the step 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. And then the mounting side surface of the bracket 22 is fixedly connected with the side surface of the control valve shell 23 by screws. The installation process of the proportional solenoid 5 on the other side of the control valve 7 is the same as the installation process described above.
And 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, then connecting the wiring terminal 211 of the wiring box 6 with a terminal positioned on the inner side of the valve cover 3 in the wiring terminal 4 by using a wire, and finally fixedly connecting the valve cover 3 on the upper surface of the main valve body 1 by using a screw 2.
The working process of the electro-hydraulic servo valve of the shunt valve controlled double-jet pipe is realized by the joint control of the control valve 7 and the main valve body 1. The control scheme adopts two-stage control:
the first stage is a control stage (pilot stage), and the control loop consists of a jet oil inlet 34, a pressure guiding pipe 8, a control valve 7, a first jet pipe 27, a second jet pipe 28, a second nozzle 29, a first nozzle 30, a first jet receiving hole 35, a second jet receiving hole 36, a right oil chamber 31, a left oil chamber 311, a left oil chamber 40, a right oil chamber 39 and the like. The control oil is introduced from an oil port P111, enters the jet flow oil inlet channel 34 through the transverse oil channel 110, and enters the control valve 7 through the pressure guiding pipe 8. The oil liquid passes through the double-cone annular gap of the control valve 7 and then is divided into a left jet flow and a right jet flow. The left jet flow passes through the first jet pipe 27 and is jetted from the first nozzle 30, then enters the first jet flow receiving hole 35, passes through the left oil passage 311 and then enters the left oil chamber 40 through the oil hole a151 of the valve sleeve 15, and the pressure oil generates a rightward hydraulic force on the main valve element 16; the right jet flow is ejected from the second nozzle 29 through the second jet pipe 28, enters the second jet flow receiving hole 36, passes through the right oil passage 31, enters the right oil chamber 39 through the oil hole G157 of the valve sleeve 15, and generates a leftward hydraulic force on the main spool 16.
When the annular gap on the left side of the control valve 7 is increased, the left path of jet pressure and the flow are increased, the right path of 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 working conditions that the left oil chamber 40 takes oil and the right oil chamber 39 returns oil are formed. The oil in the right oil chamber 39 reversely flows out through the right oil passage 31, enters the jet flow oil return passage 33 through the oil return port 37, passes through the oil hole D154 of the valve sleeve 15, and then flows out from the oil port T113. In a similar way, when the right annular gap in the control valve 7 is increased, the right path of jet pressure and the flow are increased, the left path of jet pressure and the flow are reduced, the size of the right oil chamber 39 is increased, the size of the left oil chamber 40 is reduced, and the working conditions of oil inlet of the right oil chamber 39 and oil return of the left oil chamber 40 are formed. The oil in the left oil chamber 40 reversely flows out through the left oil passage 311, enters the jet flow oil return passage 33 through the oil return port 37, passes through the oil hole D154 of the valve sleeve 15, and then 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 a port P111, a port a112, a port T113, and a port B114. The oil enters from the oil port P111 and is divided into two paths, i.e., a left path and a right path, after passing through the transverse oil passage 110. The left oil enters the oil passage A115 leftwards, and then 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; the right oil enters the oil passage a116 rightward, and then 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 proportional electromagnet 5 is increased, the proportion of the magnetic force generated by the electrified coil of the electromagnet is increased, the armature 19 in the electromagnet 5 moves rightwards to push the double-cone valve core 26 to move rightwards, and under the action of the fixed splitter ring 25, the annular gap on the left side is reduced and the annular gap on the right side 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 and the pressure in the left oil chamber 40 decreases, so that the main valve spool 16 moves leftward, the flow output from the main valve port B114 increases, and the flow output from the port a112 decreases. During the leftward movement of the main valve core 16, the displacement is fed back to the middle of the double-cone valve core 26 through the feedback spring rod 32. Under the spring force of the feedback spring rod 32, the double-cone valve core 26 is returned to the left, the pressure and the flow in the first jet pipe 27 are increased, the pressure and the flow in the second jet pipe 28 are reduced, and finally the main valve core 16 is returned to the middle position to the right.
When the current of the proportional electromagnet 5 on the right side increases, the process of the combined control of the double-cone valve core 26 and the main valve core 16 is opposite to 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 under the action of the spring force of the feedback spring rod 32, the displacement of the main valve core 16 is changed in proportion to the current of the proportional electromagnet 5, so that a main valve core displacement and spring force feedback loop is formed.
The invention controls the size of the double-cone annular gap through the double-cone valve core, realizes proportional change of jet pressure and flow and electromagnet input current, and finally realizes proportional change of displacement of the main valve core 16 and input current of the proportional electromagnet 5. Has the following outstanding advantages: the pressure guide 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, fixed in position, strong in rigidity and not easy to be 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. The servo element can provide a novel and high-reliability key servo element for national defense and air transportation industries in China.
Claims (3)
1. A method for controlling a jet flow shunt valve is characterized by comprising the following steps: the jet flow passes through a split ring arranged in the middle position in the split valve body shell through a pressure guiding pipe, and then is respectively ejected from nozzles at the top ends of the jet pipes on the left side and the right side below the split valve body through a channel between the split ring and a double-cone valve core arranged in the split ring, so that jet flow split output of the double-jet pipe is formed; when the double-cone valve core moves left and right in the splitter ring, the left and right annular gaps formed by the channels between the double-cone valve core and the splitter ring change, so that the output flow of the jet pipe generates corresponding jet flow change along with the left and right displacement of the double-cone valve core.
2. The valve control method based on the valve control method of claim 1 is characterized in that the middle of a concave groove on the main valve body is provided with an oil return port, two sides of the oil return port are provided with a first jet receiving hole and a second jet receiving hole, the outer side of the concave groove is provided with an oil inlet, the control valve is connected with the main valve body through a screw, two ends of the control valve are connected with a proportional electromagnet, and a junction box is arranged on the proportional electromagnet; the middle oil inlet above the control valve is connected with one end of a pressure guiding pipe, and the other end of the pressure guiding pipe is connected with the oil inlet; the control valve is externally provided with a valve cover with a connecting terminal, and the valve cover is connected with the main valve body through a screw; an oil port P, an oil port A, an oil port T and an oil port B are arranged on the valve bottom surface of the main valve body;
the control valve comprises a rectangular valve shell, an oil inlet hole is formed in the middle of the upper portion of the valve shell, symmetrical through holes are formed in the lower portion of the valve shell, a first jet pipe with a first nozzle and a second jet pipe with a second nozzle are respectively installed in the through holes, a circular split ring is installed on the inner wall of the middle section of the inner cavity of the valve shell, concave surfaces are formed in two ends of the split ring, a shaft hole is formed in the middle of each concave surface, a through hole is formed in the middle of the split ring, the through holes are vertically crossed with the shaft holes, and a sealing oil plug is installed in each through hole above the split; 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, the middle of the middle shaft is provided with a mounting hole, 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 split rings; the middle shaft is positioned in the shaft hole, a mounting hole in the middle shaft and the through hole of the split ring are coaxial, and the mounting hole is connected with the upper end of the feedback spring rod;
the proportional electromagnet comprises 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 a step through hole of the bracket, one end of the armature is connected with the outer end of the straight handle, the other end of the armature is connected with a 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 a 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; internal threads are arranged at two ends of the valve cavity, and a valve sleeve is arranged in the valve cavity; the periphery of the main valve core is sequentially provided with a convex ring body A, a left shaft, a convex ring body B, an intermediate 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 intermediate 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 a segmented manner 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 of the valve sleeve from left to right 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 installed in the valve sleeve, 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 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 middle shaft of the main valve core is connected with the lower end of the feedback spring rod, and two ends of the main valve core are provided with baffle rings; inner end covers are mounted at two ends of the valve cavity through internal threads, a return spring is mounted between each inner end cover and the end head of the main valve core, and a right oil chamber and a left oil chamber are formed between each inner end cover and the end head of the main valve core; the oil return port is communicated with the oil port T through a jet flow oil return channel, 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 aperture is connected to the first nozzle and the second jet receiving aperture is connected to the second nozzle.
3. The shunt valve-controlled dual-jet pipe electro-hydraulic servo valve according to claim 2, wherein the split ring is composed of an upper split ring and a lower split ring which are symmetrical up and down, and is fixedly connected into a whole by a screw.
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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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| 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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| CN110848420A true CN110848420A (en) | 2020-02-28 |
| CN110848420B CN110848420B (en) | 2024-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4148307A1 (en) * | 2021-09-10 | 2023-03-15 | Bibus Hydraulik AG | Proportional valve |
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| US20160201812A1 (en) * | 2015-01-13 | 2016-07-14 | Honeywell International Inc. | Two-position, two-stage 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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2019
- 2019-12-05 CN CN201911230993.0A patent/CN110848420B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB533801A (en) * | 1939-11-27 | 1941-02-20 | Heinrich Wertheimer | An improved regulating nozzle for fire-extinguishing and other purposes |
| GB1488711A (en) * | 1973-09-26 | 1977-10-12 | Nihon Spindle Mfg Co Ltd | Hydraulic valve |
| 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 |
| US20160201812A1 (en) * | 2015-01-13 | 2016-07-14 | Honeywell International Inc. | Two-position, two-stage servo valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP4148307A1 (en) * | 2021-09-10 | 2023-03-15 | Bibus Hydraulik AG | Proportional valve |
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