CN114215923B - Large-flow plug-in electrohydraulic servo valve with valve core combined in horizontal rotation mode - Google Patents

Large-flow plug-in electrohydraulic servo valve with valve core combined in horizontal rotation mode Download PDF

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Publication number
CN114215923B
CN114215923B CN202111552220.1A CN202111552220A CN114215923B CN 114215923 B CN114215923 B CN 114215923B CN 202111552220 A CN202111552220 A CN 202111552220A CN 114215923 B CN114215923 B CN 114215923B
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China
Prior art keywords
main valve
valve core
face
track
shaped guide
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CN202111552220.1A
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Chinese (zh)
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CN114215923A (en
Inventor
陈逸嘉
王生安
陈博
赵静一
张�浩
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Youweili Hydraulic Technology Co ltd
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Youweili Hydraulic Technology Co ltd
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Classifications

    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • 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
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
    • F16K31/52441—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve with a pivoted disc or flap
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
    • F16K31/5245—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve with a valve member of conical shape

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Multiple-Way Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

The invention provides a large-flow plug-in type electrohydraulic servo valve with a combined valve core in a horizontal rotating way, which relates to the technical field of hydraulic valves and comprises a main valve sleeve, a main valve core and a cover plate, wherein an oil inlet A and an oil outlet B are arranged on the main valve sleeve; the main valve core is connected with a horizontal rotating combination mechanism, and the horizontal rotating combination mechanism comprises a horizontal rotating track, a T-shaped guide rod, a torsion device and a stepping motor; the horizontal rotating rail is fixed on the upper end face of the cover plate, and the upper end face of the horizontal rotating rail is a circular ring rail face; the T-shaped guide rod comprises a vertical lifting rod and a horizontal clamping rod, and the lower end of the vertical lifting rod is fixedly connected with the upper end of the main valve core; the upper end face of the torsion device is fixedly connected with the stepping motor, the lower end face of the torsion device is symmetrically provided with a vertically arranged limiting groove, two ends of a horizontal clamping rod are clamped and vertically slidably arranged in the limiting groove, and two ends of the horizontal clamping rod are provided with pulleys rolling on a horizontal rotating track. The invention has the characteristics of high sensitivity, high reliability, small volume, pollution resistance, large flow and the like.

Description

Large-flow plug-in electrohydraulic servo valve with valve core combined in horizontal rotation mode
Technical Field
The invention relates to the technical field of hydraulic valves, in particular to a large-flow plug-in electrohydraulic servo valve with a spool in a horizontal-rotating combination mode.
Background
The plug-in electrohydraulic servo valve is used as one of important elements of the hydraulic system, is frequently used in the hydraulic system, and the control precision of the work of the plug-in electrohydraulic servo valve also influences the control precision of the whole hydraulic system. In the prior art, the plug-in electrohydraulic servo valve is generally composed of a main valve core, a valve sleeve, a pilot valve, a displacement sensor, an integrated control circuit and other components, wherein the main valve core is provided with two pilot control cavities, the pilot control cavity pressure is controlled by the pilot valve, the displacement of the main valve core is further controlled, and the main valve core is fed back through the high-pressure-resistant displacement sensor to form closed-loop control of the displacement of the main valve core.
In the prior art, the cartridge electrohydraulic servo valve can solve the problem of insufficient driving force by controlling the pilot stage movement and then controlling the main valve core movement through the flow amplification stage, but because a multi-stage structure is adopted, the whole valve becomes more complex, so that the oil pollution resistance of the valve is weakened, the reliability of the system is reduced, the cost is increased, and the application of the valve is limited. In addition, adding pilot valves necessitates the provision of pilot oil passages for the hydraulic system, which can complicate the overall hydraulic system.
Disclosure of Invention
The invention aims to provide a large-flow plug-in type electrohydraulic servo valve with a combined valve core in a horizontal rotation mode, which improves the moving mode of the valve core into the horizontal rotation mode, and has the characteristics of high sensitivity, high dynamic quality, high reliability, small volume, light weight, pollution resistance, large flow and the like.
The technical aim of the invention is realized by the following technical scheme:
the large-flow plug-in type electrohydraulic servo valve with the combined valve core in a horizontal rotating mode comprises a main valve sleeve, a main valve core and a cover plate, wherein an oil inlet A and an oil outlet B are arranged on the main valve sleeve, the cover plate is arranged at the top of the main valve sleeve in a covering mode, and the main valve core vertically slides and is rotatably arranged in the main valve sleeve;
the main valve core is connected with a translational joint mechanism for driving the main valve core to move, and the translational joint mechanism comprises a translational track, a T-shaped guide rod, a torsion device and a stepping motor;
the flat rotating rail is fixed on the upper end face of the cover plate and is of a hollow circular ring structure coaxial with the main valve core; the upper end face of the flat rotating track is a circular track face, the circular track face is provided with two highest points and two lowest points, the highest points and the lowest points are circumferentially arrayed and arranged at intervals, a smooth curved surface passing through the lowest points is arranged between the two highest points, and the circular track face is symmetrical about the axial lead point of the circular track face;
the T-shaped guide rod comprises a vertical lifting rod coaxial with the main valve core and a horizontal clamping rod perpendicular to the vertical lifting rod, the center position of the horizontal clamping rod is fixedly connected with the top end of the vertical lifting rod, and the lower end of the vertical lifting rod penetrates through the cover plate to extend into the main valve sleeve and is fixedly connected with the upper end of the main valve core;
the torsion device is of a hollow cylindrical structure with an opening at the lower end, the upper end face of the torsion device is fixedly connected with the stepping motor, and an input shaft of the stepping motor is coaxially arranged with the vertical lifting rod; the lower end face of the torsion device is symmetrically provided with a vertically arranged limit groove, two ends of a horizontal clamping rod of the T-shaped guide rod are clamped and vertically slidably arranged in the limit groove, and two ends of the horizontal clamping rod of the T-shaped guide rod are respectively provided with pulleys rolling on a horizontal rotation track.
Through adopting above-mentioned technical scheme, step motor receives external instruction corotation or reversal corresponding step number (step motor every step is fixed angle), drives the torsion device synchronous rotation with its fixed connection, under the spacing effect of the joint of spacing groove to horizontal clamping rod, drives T type guide arm and synchronous rotation with it, drives the main valve core synchronous rotation with vertical lifting rod fixed connection promptly. Because the circular track surface on the horizontal rotation track is a point symmetrical curved surface, in the process of rotating the horizontal clamping rod, pulleys at two ends of the horizontal clamping rod roll on the circular track surface, the pulleys drive the horizontal clamping rod to move upwards when moving from the lowest point to the highest point of the circular track surface, and the pulleys drive the horizontal clamping rod to move downwards when moving from the highest point to the lowest point of the circular track surface, namely drive the main valve core to move upwards and downwards through the T-shaped guide rod, so that the oil outlet B of the main valve sleeve is opened or closed, and further the opening and closing control of the plug-in type electrohydraulic servo valve is realized.
In summary, compared with the traditional cartridge valve which controls the pressure of a pilot cavity through a pilot valve and then controls the displacement of a main valve core, the structure of the cartridge electrohydraulic servo valve is greatly reduced, the integral length of the cartridge electrohydraulic servo valve is only about 60% of that of the traditional valve, the structure is simpler, and the pollution resistance is strong. According to the invention, the torsion device is driven to rotate by the stepping motor, and the T-shaped guide rod is driven to drive the main valve core to simultaneously move up and down and axially rotate in cooperation with the circular ring track surface of the horizontal rotation track, so that the horizontal rotation combined movement of the main valve core is realized. The displacement of the main valve core is directly controlled by the stepping motor, and the circular ring track surface of the flat rotating track ensures that the ascending or descending height of the valve core is the same when the stepping motor moves one step, so that the valve has higher control precision and response speed and larger diameter flow ratio compared with the traditional valve.
Further, the stepping motor drives the torsion device to rotate, the torsion device drives the T-shaped guide rod to rotate, meanwhile, the pulley of the horizontal clamping rod rolls on the track surface of the circular ring to drive the T-shaped guide rod to move up and down, and the T-shaped guide rod drives the main valve core to synchronously rotate and move up and down.
Through adopting above-mentioned technical scheme, set for the angle that step motor needs to rotate as required, step motor receives the corresponding step number of external instruction back corotation or reversal, and torsion device who links to each other with it drives T type guide arm and rotates, and the pulley of horizontal clamping rod rolls on the ring track face simultaneously, and then drives T type guide arm up-and-down motion to drive main case up-and-down motion in the main valve cover through vertical pull rod. The main valve core rotates and lifts at the same time, so that the opening and closing of the oil outlet B on the main valve sleeve are realized. The main valve core can be driven to rotate and lift by rotating and driving only by setting commands for the stepping motor, so that the control precision and the response speed of the invention are effective.
Further, when the pulley of the T-shaped guide rod moves to the lowest point of the circular ring track surface on the horizontal rotation track, the lower end surface of the main valve core is positioned below the oil outlet B of the main valve sleeve, and at the moment, the oil outlet B of the main valve sleeve is in a closed state; when the pulley of the T-shaped guide rod moves to the highest point of the circular ring track surface on the horizontal rotation track, the lower end surface of the main valve core is positioned above the oil outlet B of the main valve sleeve, and the oil outlet B of the main valve sleeve is in a completely opened state.
By adopting the technical scheme, when the pulley moves to the lowest point of the circular ring track surface, the main valve core completely closes the oil outlet B of the main valve sleeve, and when the pulley moves to the highest point of the circular ring track surface, the main valve core completely opens the oil outlet B of the main valve sleeve, so that the highest point and the lowest point of the circular ring track surface are reasonably arranged, the T-shaped guide rod can drive the main valve core to rotate and lift to completely close or open the oil outlet B when the stepping motor drives the torsion device to move, the working effect of the main valve core is ensured, the structure is simple, the integral structure of the horizontal rotation track is optimized, the light weight of the invention is realized, the volume of the invention is reduced, and the effect is obvious.
Further, two outwards-protruding hemispherical guide blocks are symmetrically arranged on the outer wall of the main valve core, annular guide grooves with the same shape as the annular track surface of the horizontal rotation track are formed in the inner wall of the main valve sleeve, and the annular guide grooves and the hemispherical guide blocks are matched.
Through adopting above-mentioned technical scheme, during step motor work, the pulley rolls on the ring track face, and T type guide arm drives the main valve core and goes up and down in the main valve cover, and hemispherical guide piece moves in annular guide way this moment, and its motion track is the same with the motion of pulley on the ring track face, and annular guide way hemispherical guide piece's motion plays spacing guide effect. Under the cooperation of the annular guide groove and the hemispherical guide block, the stability of the main valve core in rotation lifting is ensured, and the reliability of the invention is improved.
Further, two vertical channels which are symmetrically arranged and matched with the hemispherical guide blocks are formed in the inner wall of the main valve sleeve, and the lower ends of the two vertical channels are communicated with the lowest point of the annular guide groove; the inner diameter of the main valve sleeve between the upper end of the vertical channel and the upper end surface of the main valve sleeve is larger than the sum of the diameter of the main valve core and the radius of the two hemispherical guide blocks.
Through adopting above-mentioned technical scheme, the main valve cover internal diameter between vertical passageway upper end and the main valve cover up end makes main valve cover and two hemispherical guide blocks of outer wall can install in the main valve cover smoothly, and two hemispherical guide blocks get into in the vertical passageway from the upper end opening part of two vertical passageways respectively, then get into in the annular guide groove. The structure is simple, the installation between the main valve core and the main valve sleeve is convenient, and the main valve core and the two hemispherical guide blocks on the outer wall of the main valve core can be ensured to smoothly rotate and lift.
Further, the cover plate upper end face is covered with a protective cover, the horizontal rotation track, the T-shaped guide rod and the torsion device are positioned in the protective cover, the stepping motor is fixed on the protective cover upper end face, and an input shaft of the stepping motor extends into the protective cover and is fixedly connected with the torsion device upper end face.
Through the adoption of the technical scheme, the horizontal rotating track, the T-shaped guide rod and the torsion device are positioned in the protective cover, and the protective cover is used for carrying out safety protection on the horizontal rotating track, the T-shaped guide rod and the torsion device, so that foreign matters are prevented from falling on the horizontal rotating track when the T-shaped guide rod is used, the rolling of the pulley on the circular ring track surface is influenced, and the T-shaped guide rod is ensured to smoothly and effectively drive the main valve core to rotate and lift. In addition, the stepper motor is fixed on the outer wall of the protective cover, so that the stepper motor is convenient to install and fix, and the stability of the stepper motor during operation is guaranteed.
Further, the lower end face of the torsion device is located below the lowest point of the circular ring track surface on the horizontal rotation track, and the lower end of the limiting groove penetrates through the lower end face of the torsion device.
Through adopting above-mentioned technical scheme, the limit groove lower extreme runs through torsion device lower extreme face, the cooperation clamping of horizontal clamping rod and limit groove on the T type guide arm of being convenient for, torsion device lower extreme face is located the lower of the annular track face minimum on the horizontal rotation track, and horizontal clamping rod drops from the limit groove when avoiding horizontal clamping rod upper pulley to roll to annular track minimum, guarantees the work effect of T type guide arm.
Further, a plurality of positioning grooves are formed in the circumferential array of the upper end face of the main valve sleeve, and positioning blocks matched with the positioning grooves are arranged on the lower end face of the cover plate.
Through the technical scheme, when the cover plate is installed on the main valve sleeve, the positioning block is clamped in the positioning groove, the positioning installation of the cover plate is realized by utilizing the cooperation of the positioning block and the positioning groove, the stability of the installation of the cover plate is ensured, the stable installation of other parts on the cover plate is convenient, the structure is simple, the operation is convenient, the stable work of all parts of the invention is ensured, and the effect is obvious.
Further, an annular guide sleeve is arranged on the cover plate, and a vertical lifting rod of the T-shaped guide rod penetrates through the annular guide sleeve and stretches into the main valve sleeve to be fixedly connected with the upper end of the main valve core.
By adopting the technical scheme, the annular guide sleeve plays a supporting and limiting role on the T-shaped guide rod, so that the stability of the T-shaped guide rod in driving the main valve core to rotate and lift is ensured, and the working stability of the invention is further ensured.
Further, the main valve core is of a hollow structure with an opening at the bottom, the opening at the bottom is communicated with an oil inlet A of the main valve sleeve, and a plurality of balance holes communicated with the hollow inside of the main valve core are formed in the circumferential array of the upper end face of the main valve core.
Through adopting above-mentioned technical scheme, the balancing hole that main valve core up end set up communicates with its cavity inside, and wherein inside and main valve pocket's oil inlet A intercommunication realizes the intercommunication of oil circuit for fluid can circulate, guarantees like this that main valve cover oil inlet A's pressure and the pressure of main valve core top cavity unanimous, realizes pressure balance.
In summary, the invention has the following beneficial effects:
1. the stepping motor, the torsion device, the flat rotating track with the circular track surface and the T-shaped guide rod are arranged, the torsion device is directly driven by the stepping motor to drive the T-shaped guide rod to rotate, the pulley of the T-shaped guide rod rolls on the circular track surface of the flat rotating track while the T-shaped guide rod rotates, so that the T-shaped guide rod ascends and descends, the T-shaped guide rod drives the main valve core to synchronously rotate and ascend and descend, the opening and closing of an oil outlet B on the main valve sleeve are realized, and the opening degree of the oil outlet B is controlled; the lifting displacement of the main valve core is controlled by only using the stepping motor, the height of the lifting of the main valve core is the same in each step of movement of the stepping motor due to the arrangement of the circular ring track surface, the control precision and the response speed of the invention are effectively improved, and the invention has larger diameter flow ratio and realizes large flow;
2. the two symmetrically arranged hemispherical guide blocks are arranged on the outer wall of the main valve core, the annular guide grooves which are matched with the hemispherical guide blocks and have the same track as the track of the circular track surface are arranged on the inner wall of the main valve sleeve, so that the limit guide function is realized on the rotation lifting of the main valve core, and the reliability of the invention is improved;
3. compared with the traditional cartridge valve which controls the pressure of the pilot cavity through the pilot valve and then controls the displacement of the main valve core, the structure design of the invention is optimized, the overall length is greatly reduced, only about 60% of the traditional cartridge valve has the advantages of small volume and light weight, and the invention has simple structure and stronger pollution resistance.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of a spool-side-turn combined high-flow cartridge electrohydraulic servo valve;
FIG. 2 is a schematic structural diagram of a flat rotating track and a T-shaped guide rod in a large-flow plug-in electrohydraulic servo valve with a flat rotating combined valve core, which is used for reflecting the state when a pulley on the T-shaped guide rod moves to the lowest point of a circular ring track surface;
FIG. 3 is a schematic structural view of a flat rotating track and a T-shaped guide rod in a large-flow plug-in electrohydraulic servo valve with a flat rotating combined valve core, which is used for reflecting the state when a pulley on the T-shaped guide rod moves to the highest point of a track surface of a circular ring;
FIG. 4 is a schematic structural view of a main valve spool in a spool-parallel-rotation combined high-flow cartridge electrohydraulic servo valve for embodying two hemispherical guide blocks;
FIG. 5 is a schematic structural view of a main valve sleeve in a spool-side-turn combined high-flow cartridge electrohydraulic servo valve for embodying annular guide slots and vertical channels.
In the figure, 1, a main valve sleeve; 11. an annular guide groove; 12. a vertical channel; 13. a positioning groove; 2. a main spool; 21. hemispherical guide blocks; 22. a balance hole; 3. a cover plate; 31. a positioning block; 32. an annular guide sleeve; 4. a track is rotated flatly; 41. a circular ring track surface; 5. a T-shaped guide rod; 51. a vertical lifting rod; 52. a horizontal clamping rod; 53. a pulley; 6. a torsion device; 61. a limit groove; 7. a stepping motor; 8. and a protective cover.
Detailed Description
The invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The utility model provides a large-traffic cartridge formula electrohydraulic servo valve that case corotation combines, as shown in fig. 1, includes main valve pocket 1, main valve element 2, apron 3, is equipped with oil inlet A in the lower extreme of main valve pocket 1, is equipped with a plurality of circular oil-out B at the outer wall that main valve pocket 1 is close to the bottom in the circumference array, and main valve element 2 vertically slides and rotates to install in main valve pocket 1, realizes opening or closing to oil-out B through the vertical slip of main valve element 2. The main valve core 2 is of a hollow structure with an opening at the bottom, the opening at the bottom is communicated with an oil inlet A of the main valve sleeve 1, four balance holes 22 communicated with the hollow inside of the main valve core 2 are circumferentially arranged on the upper end face of the main valve core 2, the communication of the balance holes 22 with the inside of the main valve core 2 and the oil inlet A is utilized to realize the circulation of oil, the pressure at the oil inlet A of the main valve sleeve 1 is ensured to be consistent with the pressure of a cavity above the main valve core 2, and the pressure balance is realized.
As shown in fig. 1, the cover plate 3 is a cylindrical structure with an opening at the lower end surface and is arranged at the top of the main valve sleeve 1, a plurality of positioning grooves 13 are circumferentially arrayed at the top of the main valve sleeve 1, a plurality of positioning blocks 31 matched with the positioning grooves 13 are arranged on the inner bottom surface of the cover plate 3, positioning and installation between the cover plate 3 and the main valve sleeve 1 are realized by utilizing the matching of the positioning blocks 31 and the positioning grooves 13, and the installation stability of the cover plate 3 is ensured. In addition, the cover plate 3 is also provided with a plurality of threaded holes (not shown in the figure) for the fixed installation of the whole plug-in electrohydraulic servo valve.
As shown in fig. 1, the main valve element 2 is connected with a translational coupling mechanism which drives the main valve element to rotate and move up and down, and the translational mechanism comprises a translational track 4, a T-shaped guide rod 5, a torsion device 6 and a stepping motor 7. The upper end face of the cover plate 3 is provided with a protective cover 8, the horizontal rotating track 4 is fixed on the upper end face of the cover plate 3 and is positioned in the protective cover 8, the T-shaped guide rod 5 and the torsion device 6 are also positioned in the protective cover 8, the stepping motor 7 is fixed on the upper end face of the protective cover 8, an input shaft of the stepping motor 7 extends into the protective cover 8 and is fixedly connected with the upper end face of the torsion device 6, and the input shaft of the stepping motor 7 is coaxially arranged with the main valve core 2.
In the present embodiment, as shown in fig. 1, 2 and 3, the panning rail 4 is a hollow annular shape coaxial with the main valve element 2, the upper end surface of the panning rail 4 is a circular ring rail surface 41, and the circular ring rail surface 41 has two highest points and two lowest points, and the highest points and the lowest points are circumferentially arrayed and spaced apart. The smooth curved surface passing through the lowest point is arranged between the two highest points, and the circular track surface 41 is symmetrical about the axial line point, namely, the connecting line of any two points on the circular track surface 41 along the radial direction of the horizontal rotating track 4 is horizontal and vertical to the axial line of the horizontal rotating track 4.
As shown in fig. 1, the T-shaped guide rod 5 includes a vertical lifting rod 51 coaxial with the main valve core 2 and a horizontal clamping rod 52 perpendicular to the vertical lifting rod 51, and the center position of the horizontal clamping rod 52 is fixedly connected with the top end of the vertical lifting rod 51. The center of the cover plate 3 is provided with an annular guide sleeve 32, and the lower end of the vertical lifting rod 51 penetrates through the annular guide sleeve 32 and stretches into the main valve sleeve 1 to be fixedly connected with the upper end of the main valve core 2. As shown in fig. 2 or 3, the horizontal clamping rod 52 is provided with pulleys 53 at both ends thereof via bearings, and the two pulleys 53 are rollingly mounted on the circular track surface 41 of the horizontal track 4.
As shown in fig. 1, the torsion device 6 is a hollow cylindrical structure with an opening at the lower end surface, vertically arranged limit grooves 61 are symmetrically arranged at the lower end surface of the torsion device 6, and two ends of a horizontal clamping rod 52 of the t-shaped guide rod 5 are clamped and vertically slidably arranged in the limit grooves 61. As shown in fig. 1, the stepping motor 7 drives the torsion device 6 to rotate, the torsion device 6 drives the T-shaped guide rod 5 to rotate under the limit action of the limit groove 61 on the horizontal clamping rod 52, and the pulley 53 on the horizontal clamping rod 52 rolls on the circular ring track surface 41 while the horizontal clamping rod 52 rotates, so that the T-shaped guide rod 5 is driven to move up and down, that is, the T-shaped guide rod 5 rotates and lifts while rotating, so that the T-shaped guide rod 5 drives the main valve core 2 to rotate and lift while rotating through the vertical lifting rod 51, that is, the main valve core 2 rotates and lifts to open and close the oil outlet B on the main valve sleeve 1.
As shown in fig. 1, 2 and 3, when the pulley 53 of the T-shaped guide rod 5 moves to the lowest point of the circular track surface 41 on the horizontal track 4, the lower end surface of the main valve core 2 is located below the oil outlet B of the main valve housing 1, and at this time, the oil outlet B of the main valve housing 1 is in a closed state; when the pulley 53 of the T-shaped guide rod 5 moves to the highest point of the annular track surface 41 on the horizontal rotating track 4, the lower end surface of the main valve core 2 is positioned above the oil outlet B of the main valve sleeve 1, and the oil outlet B of the main valve sleeve 1 is in a fully opened state. In addition, as shown in fig. 1, the lower end surface of the torsion device 6 is located below the lowest point of the circular track surface 41 on the horizontal track 4, and the lower end of the limit groove 61 penetrates the lower end surface of the torsion device 6, so that the installation of the horizontal clamping rod 52 is facilitated, and the horizontal clamping rod 52 can be ensured not to be separated from the limit groove 61 when the pulley 53 moves to the lowest point of the circular track surface 41.
In order to ensure the stability of the rotation and lifting of the main valve core 2 and improve the reliability of the invention, as shown in fig. 1, 4 and 5, two hemispherical guide blocks 21 protruding outwards are symmetrically arranged on the outer wall of the main valve core 2, an annular guide groove 11 with the same shape as the annular track surface 41 of the horizontal rotating track 4 is arranged on the inner wall of the main valve sleeve 1, and the annular guide groove 11 and the hemispherical guide blocks 21 are matched. When the stepping motor 7 works, the pulley 53 rolls on the circular track surface 41, the T-shaped guide rod 5 drives the main valve core 2 to lift in the main valve sleeve 1, the hemispherical guide block 21 moves in the circular guide groove 11 at the moment, the movement track of the hemispherical guide block 21 is the same as the movement of the pulley 53 on the circular track surface 41, and the circular guide groove 11 plays a limiting guide role on the movement of the hemispherical guide block 21.
In addition, as shown in fig. 1 and 5, two vertical channels 12 which are symmetrically arranged and matched with the hemispherical guide blocks 21 are arranged on the inner wall of the main valve sleeve 1, the lower ends of the two vertical channels 12 are communicated with the lowest point of the annular guide groove 11, and the inner diameter of the main valve sleeve 1 between the upper end of the vertical channel 12 and the upper end surface of the main valve sleeve 1 is larger than the sum of the diameter of the main valve core 2 and the radius of the two hemispherical guide blocks 21. The inner diameter of the main valve sleeve 1 between the upper end of the vertical channel 12 and the upper end surface of the main valve sleeve 1 is larger, so that the main valve sleeve 1 and two hemispherical guide blocks 21 on the outer wall of the main valve sleeve can be smoothly installed in the main valve sleeve 1, the two hemispherical guide blocks 21 respectively enter the vertical channel 12 from the upper end openings of the two vertical channels 12 and enter the annular guide groove 11 from the vertical channel 12, and the quick installation of the main valve core 2 is realized.
The working principle and the using method of the invention are as follows:
the stepping motor 7 receives external instructions to rotate forward or reversely by corresponding steps, drives the torsion device 6 fixedly connected with the stepping motor to rotate synchronously, and drives the T-shaped guide rod 5 to rotate synchronously with the horizontal clamping rod 52 under the clamping and limiting effect of the limiting groove 61. In the process of rotating the horizontal clamping rod 52, the pulleys 53 at the two ends of the horizontal clamping rod 52 roll on the circular track surface 41, the pulleys 53 drive the horizontal clamping rod 52 to move upwards when moving from the lowest point to the highest point of the circular track surface 41, and the pulleys 53 drive the horizontal clamping rod 52 to move downwards when moving from the highest point to the lowest point of the circular track surface 41, namely, the T-shaped guide rod 5 rotates and lifts. The vertical lifting rod 51 is fixedly connected with the main valve core 2, so that the main valve core 2 and the main valve core synchronously rotate and move up and down, the oil outlet B of the main valve sleeve 1 is opened or closed, and further the opening and closing control of the plug-in type electrohydraulic servo valve is realized.
When the pulley 53 of the T-shaped guide rod 5 moves to the lowest point of the circular track surface 41 on the horizontal rotating track 4, the lower end surface of the main valve 2 is located below the oil outlet B of the main valve housing 1, and the oil outlet B of the main valve housing 1 is in a closed state. Along with this, the pulley 53 of the T-shaped guide rod 5 continuously moves the T-shaped guide rod 5 along the circular track surface 41 on the horizontal rotating track 4 to drive the main valve core 2 to continuously rise to open the oil outlet B, and the flow area of the oil outlet B is larger and larger. When the pulley 53 of the T-shaped guide rod 5 moves to the highest point of the circular ring track surface 41 on the horizontal rotating track 4, the lower end surface of the main valve core 2 is positioned above the oil outlet B of the main valve sleeve 1, and at this time, the oil outlet B of the main valve sleeve 1 is in a fully opened state, and the flow area of the oil outlet B reaches the maximum.
While the foregoing description illustrates and describes the preferred embodiments of the present invention, as noted above, it is to be understood that the invention is not limited to the forms disclosed herein but is not to be construed as excluding other embodiments, and that various other combinations, modifications and environments are possible and may be made within the scope of the inventive concepts described herein, either by way of the foregoing teachings or by those of skill or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.

Claims (8)

1. A large-flow cartridge electrohydraulic servo valve with a valve core combined in a horizontal rotation mode is characterized in that: the novel hydraulic oil-saving valve comprises a main valve sleeve (1), a main valve core (2) and a cover plate (3), wherein an oil inlet A and an oil outlet B are formed in the main valve sleeve (1), the cover plate (3) is arranged at the top of the main valve sleeve (1) in a covering mode, and the main valve core (2) vertically slides and is rotatably arranged in the main valve sleeve (1);
the main valve core (2) is connected with a translational joint mechanism for driving the main valve core to move, and the translational joint mechanism comprises a translational track (4), a T-shaped guide rod (5), a torsion device (6) and a stepping motor (7);
the flat rotating track (4) is fixed on the upper end face of the cover plate (3) and is of a hollow circular ring structure coaxial with the main valve core (2); the upper end face of the flat rotating track (4) is a circular track face (41), the circular track face (41) is provided with two highest points and two lowest points, the highest points and the lowest points are circumferentially arrayed and are arranged at intervals, a smooth curved surface passing through the lowest points is arranged between the two highest points, and the circular track face (41) is symmetrical about the axial line point of the circular track face;
the T-shaped guide rod (5) comprises a vertical lifting rod (51) coaxial with the main valve core (2) and a horizontal clamping rod (52) perpendicular to the vertical lifting rod (51), the central position of the horizontal clamping rod (52) is fixedly connected with the top end of the vertical lifting rod (51), and the lower end of the vertical lifting rod (51) penetrates through the cover plate (3) to extend into the main valve sleeve (1) to be fixedly connected with the upper end of the main valve core (2);
the torsion device (6) is of a hollow cylindrical structure with an opening at the lower end, the upper end face of the torsion device is fixedly connected with the stepping motor (7), and an input shaft of the stepping motor (7) and the vertical lifting rod (51) are coaxially arranged; the lower end face of the torsion device (6) is symmetrically provided with a vertically arranged limit groove (61), two ends of a horizontal clamping rod (52) of the T-shaped guide rod (5) are clamped and vertically and slidably arranged in the limit groove (61), and two ends of the horizontal clamping rod (52) of the T-shaped guide rod (5) are respectively provided with pulleys (53) rolling on the horizontal rotating track (4);
the stepping motor (7) drives the torsion device (6) to rotate, the torsion device (6) drives the T-shaped guide rod (5) to rotate, meanwhile, the pulley (53) of the horizontal clamping rod (52) rolls on the circular track surface (41) to drive the T-shaped guide rod (5) to move up and down, and the T-shaped guide rod (5) drives the main valve core (2) to synchronously rotate and move up and down;
when the pulley (53) of the T-shaped guide rod (5) moves to the lowest point of the circular ring track surface (41) on the horizontal rotation track (4), the lower end surface of the main valve core (2) is positioned below the oil outlet B of the main valve sleeve (1), and at the moment, the oil outlet B of the main valve sleeve (1) is in a closed state; when the pulley (53) of the T-shaped guide rod (5) moves to the highest point of the circular ring track surface (41) on the horizontal rotation track (4), the lower end surface of the main valve core (2) is positioned above the oil outlet B of the main valve sleeve (1), and at the moment, the oil outlet B of the main valve sleeve (1) is in a fully opened state.
2. The spool-parallel-rotation-combined high-flow cartridge electrohydraulic servo valve of claim 1 wherein: the outer wall of the main valve core (2) is symmetrically provided with two outwards-protruding hemispherical guide blocks (21), the inner wall of the main valve sleeve (1) is provided with an annular guide groove (11) which is identical to the annular track surface (41) of the horizontal rotation track (4) in shape, and the annular guide groove (11) and the hemispherical guide blocks (21) are matched.
3. The spool-parallel-rotation-combined high-flow cartridge electrohydraulic servo valve of claim 2 wherein: the inner wall of the main valve sleeve (1) is provided with two vertical channels (12) which are symmetrically arranged and matched with the hemispherical guide blocks (21), and the lower ends of the two vertical channels (12) are communicated with the lowest point of the annular guide groove (11); the inner diameter of the main valve sleeve (1) between the upper end of the vertical channel (12) and the upper end surface of the main valve sleeve (1) is larger than the sum of the diameter of the main valve core (2) and the radius of the two hemispherical guide blocks (21).
4. The spool-parallel-rotation-combined high-flow cartridge electrohydraulic servo valve of claim 1 wherein: the cover plate (3) upper end face cover is provided with a protective cover (8), the horizontal rotation track (4), the T-shaped guide rod (5) and the torsion device (6) are located in the protective cover (8), the stepping motor (7) is fixed on the upper end face of the protective cover (8), and an input shaft of the stepping motor (7) extends into the protective cover (8) to be fixedly connected with the upper end face of the torsion device (6).
5. The spool-parallel-rotation-combined high-flow cartridge electrohydraulic servo valve of claim 1 wherein: the lower end face of the torsion device (6) is located below the lowest point of the circular ring track surface (41) on the horizontal rotating track (4), and the lower end of the limiting groove (61) penetrates through the lower end face of the torsion device (6).
6. The spool-parallel-rotation-combined high-flow cartridge electrohydraulic servo valve of claim 1 wherein: the main valve sleeve (1) is characterized in that a plurality of positioning grooves (13) are formed in the upper end face of the main valve sleeve in a circumferential array mode, and positioning blocks (31) matched with the positioning grooves (13) are arranged on the lower end face of the cover plate (3).
7. The spool-parallel-rotation-combined high-flow cartridge electrohydraulic servo valve of claim 1 wherein: an annular guide sleeve (32) is arranged on the cover plate (3), and a vertical lifting rod (51) of the T-shaped guide rod (5) penetrates through the annular guide sleeve and stretches into the main valve sleeve (1) to be fixedly connected with the upper end of the main valve core (2).
8. The spool-parallel-rotation-combined high-flow cartridge electrohydraulic servo valve of claim 1 wherein: the main valve core (2) is of a hollow structure with an opening at the bottom, the opening at the bottom is communicated with an oil inlet A of the main valve sleeve (1), and a plurality of balance holes (22) communicated with the hollow inside of the main valve core (2) are formed in a circumferential array on the upper end face of the main valve core (2).
CN202111552220.1A 2021-12-17 2021-12-17 Large-flow plug-in electrohydraulic servo valve with valve core combined in horizontal rotation mode Active CN114215923B (en)

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CN106762913A (en) * 2017-01-24 2017-05-31 王安基 Servo forges valve and servo system soon
CN108413116A (en) * 2017-02-10 2018-08-17 浙江三花旋转阀有限公司 A kind of rotating type change valve and its cam mechanism
CN110107710A (en) * 2019-06-03 2019-08-09 宁波真格液压科技有限公司 A kind of regulating valve
CN110778760A (en) * 2019-11-15 2020-02-11 东莞海特帕沃液压科技有限公司 Safety valve
CN113007421A (en) * 2021-04-12 2021-06-22 渭南美联桥汽车新技术研究院有限公司 Gasoline engine EGR lift valve and opening and closing method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1368199A (en) * 1971-07-15 1974-09-25 Stefani Tecnomec Precisa Soc Gas flow control devices
JP2000193103A (en) * 1998-12-24 2000-07-14 Kurimoto Ltd Opening/closing device of rotary valve having auxiliary valve
JP2000227165A (en) * 1999-02-05 2000-08-15 Saginomiya Seisakusho Inc Motor control valve
CN201757183U (en) * 2010-04-19 2011-03-09 杭州先锋电子技术股份有限公司 Explosion-preventing slow-opening and fast-closing cut-off type motor valve
CN105546187A (en) * 2015-12-30 2016-05-04 金卡高科技股份有限公司 Built-in flow control mechanism of gas meter
CN106762913A (en) * 2017-01-24 2017-05-31 王安基 Servo forges valve and servo system soon
CN108413116A (en) * 2017-02-10 2018-08-17 浙江三花旋转阀有限公司 A kind of rotating type change valve and its cam mechanism
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