CN106837940B - The suppression servo valve self-oscillation device of adjustable orifice area - Google Patents

The suppression servo valve self-oscillation device of adjustable orifice area Download PDF

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Publication number
CN106837940B
CN106837940B CN201710183844.8A CN201710183844A CN106837940B CN 106837940 B CN106837940 B CN 106837940B CN 201710183844 A CN201710183844 A CN 201710183844A CN 106837940 B CN106837940 B CN 106837940B
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China
Prior art keywords
valve
valve core
conical
cone
poppet
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CN201710183844.8A
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Chinese (zh)
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CN106837940A (en
Inventor
陈猛
卫卫
石海军
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Huatian Engineering and Technology Corp MCC
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Huatian Engineering and Technology Corp MCC
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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
    • F15B21/008—Reduction of noise or vibration
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8609—Control during or prevention of abnormal conditions the abnormal condition being cavitation
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8613—Control during or prevention of abnormal conditions the abnormal condition being oscillations

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)

Abstract

The present invention discloses a kind of suppression servo valve self-oscillation device of adjustable orifice area, including valve seat, the guiding valve being adapted to the valve seat, valve seat spill port and the throttling arrangement being arranged in valve seat spill port；The valve seat spill port entrance is correspondingly arranged with nozzle flapper jet area, and the throttling arrangement includes the poppet valve core being connected with the valve seat spill port inner thread and the conical valve base being threadedly coupled with the valve seat spill port；When the top of the cone of the poppet valve core is non-intersect with the conical valve base end face, through-flow maximum between poppet valve core and conical valve base；Enter with the cone of the poppet valve core in the first through flow hole of the conical valve base, flow area is gradually reduced between poppet valve core and conical valve base；The present invention is by changing poppet valve core and conical valve base distance, so as to change orifice size and return oil pressure, reduces the air pocket of jet area, suppresses servo valve self-oscillation.

Description

The suppression servo valve self-oscillation device of adjustable orifice area
Technical field
The present invention relates to a kind of suppression servo valve self-oscillation device of adjustable orifice area.
Background technology
Hydraulic system develops in fields such as space flight towards miniaturization, integrated direction, pump, servo valve, the liquid of hydraulic system The components such as cylinder pressure are integrated in integrated package.But these can all cause hydraulic system pressure fluctuation it is more prominent.Should in system Nozzle-flapper servo valve is particularly susceptible to this pressure oscillation disturbance and causes self-oscillation phenomenon.The self-oscillation of servo valve Phenomenon is commonly called as uttering long and high-pitched sounds, typically a kind of higher-order of oscillation, the part such as support being particularly easy in damage servo valve, and then causes servo Valve and whole hydraulic system can not work.The problem is in the industry cycle also in continuous research at present, also without it is a kind of it is universal effectively Measure come thoroughly eliminate.Dual Injector Baffle servo valve forms a low-pressure area due to the effect of jet, in throttling exit, when When this low-pressure area forms certain vacuum, fluid gasifies to form air pocket, brings servo valve noise and self-oscillation.Therefore it is such a Servo valve typically has meter out hole, and its application can improve servo valve return oil pressure, reduces air pocket in a way Produce, improve the stability of nozzle-flapper servo valve, but also bring along the linearity change of flow gain, flow, so choosing It is most important to such a servo valve stability and other discharge characteristics to select suitable throttle hole area.
The content of the invention
In view of the above-mentioned problems, the present invention provides a kind of self-oscillatory adjustable orifice area for being used to suppress servo valve Suppress servo valve self-oscillation device.
To reach above-mentioned purpose, a kind of suppression servo valve self-oscillation device of adjustable orifice area of the present invention, including Valve seat, the guiding valve being adapted to the valve seat, valve seat spill port and the throttling arrangement being arranged in valve seat spill port；
The valve seat spill port entrance is correspondingly arranged with nozzle flapper jet area, and the throttling arrangement includes and the valve The poppet valve core of seat spill port inner thread connection and the conical valve base being threadedly coupled with the valve seat spill port；In the conical valve base The heart is provided with the first through flow hole, and the poppet valve core is fixedly connected with a cone with the conical valve base opposing end surface, the cone Basal diameter is less than the diameter of the poppet valve core, the cone center line, poppet valve core center line and conical valve base centerline collineation Set；The poppet valve core is provided with some second through flow holes around cone；
When the top of the cone of the poppet valve core is non-intersect with the conical valve base end face, lead between poppet valve core and conical valve base Stream is maximum；As the cone of the poppet valve core is progressed into the first through flow hole of the conical valve base, poppet valve core and conical valve base it Between flow area be gradually reduced.
Preferably, the poppet valve core is fixedly connected with the valve seat spill port inwall, the poppet valve core is close to the valve seat Spill port entrance is set, and the conical valve base end face opposite with the poppet valve core, which is provided with, screws hole；Or
The conical valve base is fixedly connected with the valve seat spill port, and the conical valve base is set close to the valve seat spill port, The poppet valve core end face opposite with the conical valve base, which is provided with, screws hole.
Preferably, the basal diameter of the cone of the poppet valve core bottom is more than the diameter of first through flow hole.
Preferably, the poppet valve core is provided centrally with threeway discharge orifice, the threeway the diameter of flowing hole is less than described first Through flow hole.
Preferably, the first through flow hole arrival end on the conical valve base end face corresponding with the poppet valve core is inclined-plane, Angle of inclination is adapted with the cone of the poppet valve core；
When the poppet valve core cone enter first through flow hole in and the poppet valve core cone and described first Through flow hole for inclined-plane port coordinate when, it is only through-flow by the threeway discharge orifice between the poppet valve core and the conical valve base and Flow area is minimum；
Institute of the invention changes orifice size and then changes return oil pressure, reach by changing poppet valve core and adjustable cone valve distance Suppress the self-oscillatory purpose of servo valve to the air pocket for reducing jet area, while adjust throttle orifice flow area and reach stability With the balance of other discharge characteristics.
Brief description of the drawings
Fig. 1 is the overall schematic cross-sectional view of apparatus of the present invention；
Fig. 2 is conical valve base schematic perspective view of the present invention；
Fig. 3 is poppet valve core schematic perspective view of the present invention.
Embodiment
With reference to Figure of description, the present invention will be further described.
Embodiment 1
A kind of suppression servo valve self-oscillation device of adjustable orifice area of the present embodiment, including valve seat 1 and the valve Guiding valve 2, valve seat spill port and the throttling arrangement being arranged in valve seat spill port of the adaptation of seat 1；
The valve seat spill port entrance is correspondingly arranged with nozzle flapper jet area, and the throttling arrangement includes and the valve The poppet valve core 4 of seat spill port inner thread connection and the conical valve base 3 being threadedly coupled with the valve seat spill port；The conical valve base 3 Be provided centrally with the first through flow hole 5, the poppet valve core 4 is fixedly connected with a cone 7, institute with the opposing end surface of conical valve base 3 The basal diameter for stating cone 7 is less than the diameter of the poppet valve core 4, the center line of cone 7, the center line of poppet valve core 4 and the cone valve 3 centerline collineations of seat are set；The poppet valve core 4 is provided with some second through flow holes 6 around cone 7；
When the top of the cone 7 of the poppet valve core 4 is non-intersect with the end face of conical valve base 3, poppet valve core 4 and conical valve base 3 Between through-flow maximum；As the cone 7 of the poppet valve core 4 is progressed into the first through flow hole 5 of the conical valve base 3, poppet valve core 4 Flow area is gradually reduced between conical valve base 3.
The logical regulation poppet valve core 4 of the present embodiment and cone valve distance, change orifice size, and then change return oil pressure, reach and subtract The air pocket of few jet area, suppresses the self-oscillatory purpose of such a servo valve.
Embodiment 2
Based on above-described embodiment, poppet valve core 4 described in the present embodiment is fixedly connected with the valve seat spill port inwall, the cone Valve element 4 is set close to the valve seat spill port entrance, and the conical valve base 3 end face opposite with the poppet valve core 4, which is provided with, to screw Hole；Or
The conical valve base 3 is fixedly connected with the valve seat spill port, and the conical valve base 3 is set close to the valve seat spill port Put, the poppet valve core 4 end face opposite with the conical valve base 3, which is provided with, screws hole.
The present embodiment can change poppet valve core 4 and adjustable cone valve distance by screwing hole, and then adjust throttle orifice and lead to Flow area reaches the balance of stability and other discharge characteristics, suppresses the self-oscillation of such a servo valve.
Embodiment 3
Based on above-described embodiment, it is logical that the basal diameter of the cone 7 of the bottom of poppet valve core 4 described in the present embodiment is more than described first The diameter of discharge orifice 5；
The poppet valve core 4 is provided centrally with threeway discharge orifice, and the threeway the diameter of flowing hole is less than first through flow hole 5；
The arrival end of the first through flow hole 5 on the conical valve base 3 end face corresponding with the poppet valve core 4 is inclined-plane, is tilted Angle is adapted with the cone of the poppet valve core 4；
When the cone of the poppet valve core 4 enters in first through flow hole 5 and the cone of the poppet valve core 4 and described the When one through flow hole 5 coordinates for the port on inclined-plane, only pass through the threeway discharge orifice between the poppet valve core 4 and the conical valve base 3 Through-flow and flow area is minimum；
When threeway discharge orifice described in the present embodiment is used to prevent that regulation from screwing hole, cone 7 and the cone of the poppet valve core 4 The first through flow hole 5 sealing of valve seat 3, which coordinates, blocks spill port, at the same when the poppet valve core 4 cone and the first through flow hole 5 it is oblique Face coordinate when, spill port only reaches minimum flow area by the way that threeway discharge orifice is through-flow, expand the present embodiment device it is through-flow Area adjustable range.
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto is any to be familiar with sheet Those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in should all be covered Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the protection domain that claim is defined.

Claims (5)

  1. A kind of 1. suppression servo valve self-oscillation device of adjustable orifice area, it is characterised in that：Including valve seat and the valve Guiding valve, valve seat spill port and the throttling arrangement being arranged in valve seat spill port of seat adaptation；
    The valve seat spill port entrance is correspondingly arranged with nozzle flapper jet area, and the throttling arrangement includes returning with the valve seat The poppet valve core of oilhole inner thread connection and the conical valve base being threadedly coupled with the valve seat spill port；The center of the conical valve base is set The first through flow hole is equipped with, the poppet valve core is fixedly connected with a cone, the bottom surface of the cone with the conical valve base opposing end surface Diameter is less than the diameter of the poppet valve core, and the cone center line, poppet valve core center line and conical valve base centerline collineation are set； The poppet valve core is provided with some second through flow holes around cone；
    When the top of the cone of the poppet valve core is non-intersect with the conical valve base end face, through-flow face between poppet valve core and conical valve base Product is maximum；As the cone of the poppet valve core is progressed into the first through flow hole of the conical valve base, poppet valve core and conical valve base it Between flow area be gradually reduced.
  2. A kind of 2. suppression servo valve self-oscillation device of adjustable orifice area as claimed in claim 1, it is characterised in that：Institute State poppet valve core to be fixedly connected with the valve seat spill port inwall, the poppet valve core is set close to the valve seat spill port entrance, institute State the conical valve base end face opposite with the poppet valve core and be provided with and screw hole；Or
    The conical valve base is fixedly connected with the valve seat spill port, and the conical valve base is set close to the valve seat spill port, described The poppet valve core end face opposite with the conical valve base, which is provided with, screws hole.
  3. A kind of 3. suppression servo valve self-oscillation device of adjustable orifice area as claimed in claim 1, it is characterised in that：Institute The basal diameter for stating the cone of poppet valve core bottom is more than the diameter of first through flow hole.
  4. A kind of 4. suppression servo valve self-oscillation device of adjustable orifice area as claimed in claim 3, it is characterised in that：Institute State poppet valve core and be provided centrally with threeway discharge orifice, the threeway the diameter of flowing hole is less than first through flow hole.
  5. A kind of 5. suppression servo valve self-oscillation device of adjustable orifice area as claimed in claim 4, it is characterised in that：Institute It is inclined-plane, angle of inclination and the cone valve to state the first through flow hole arrival end on the conical valve base end face corresponding with the poppet valve core The cone of core is adapted；
    When the cone of the poppet valve core enters in first through flow hole and the cone of the poppet valve core and described first through-flow It is only through-flow and through-flow by the threeway discharge orifice between the poppet valve core and the conical valve base when hole coordinates for the port on inclined-plane Area is minimum.
CN201710183844.8A 2017-03-24 2017-03-24 The suppression servo valve self-oscillation device of adjustable orifice area Active CN106837940B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710183844.8A CN106837940B (en) 2017-03-24 2017-03-24 The suppression servo valve self-oscillation device of adjustable orifice area

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Application Number Priority Date Filing Date Title
CN201710183844.8A CN106837940B (en) 2017-03-24 2017-03-24 The suppression servo valve self-oscillation device of adjustable orifice area

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CN106837940A CN106837940A (en) 2017-06-13
CN106837940B true CN106837940B (en) 2018-03-30

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110206937A (en) * 2019-06-24 2019-09-06 上海衡拓液压控制技术有限公司 Eliminate the device that pressure is shaken during pressure servo valve pressure declines
CN112664510B (en) * 2020-11-27 2022-12-09 北京精密机电控制设备研究所 Pre-stage performance integration testing device for offset jet servo valve

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403015A1 (en) * 1984-01-28 1985-08-01 Mannesmann Rexroth GmbH, 8770 Lohr SERVO VALVE
JP2678601B2 (en) * 1987-08-31 1997-11-17 カヤバ工業株式会社 Servo valve neutral point adjuster
JPH04191507A (en) * 1990-11-22 1992-07-09 Res Dev Corp Of Japan Hydraulic servo valve
CN102094865B (en) * 2009-12-11 2013-05-08 陈镇汉 Intelligent electrohydraulic flow servo valve
CN201851415U (en) * 2010-11-09 2011-06-01 韩晓新 Electro-hydraulic servo valve
CN206600329U (en) * 2017-03-24 2017-10-31 中冶华天工程技术有限公司 The suppression servo valve self-oscillation device of adjustable orifice area

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