CN107524652A - Valve design method during trench mode based on gap stream is returned - Google Patents
Valve design method during trench mode based on gap stream is returned Download PDFInfo
- Publication number
- CN107524652A CN107524652A CN201710585393.0A CN201710585393A CN107524652A CN 107524652 A CN107524652 A CN 107524652A CN 201710585393 A CN201710585393 A CN 201710585393A CN 107524652 A CN107524652 A CN 107524652A
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- China
- Prior art keywords
- actuator
- returned
- convex shoulder
- valve
- trench
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Abstract
Valve design method in being returned the invention discloses a kind of trench mode based on gap stream, comprises the following steps：The first step, position in being returned according to the safety of rudder face, determine the center returned mesopore A (4), return mesopore B (6) on trench valve pocket (2)；Second step, the index request of medium velocity is returned according to actuator, formula is flowed by gapControl convex shoulder A (3), the diameter and length dimension of time middle control convex shoulder B (5), meet the requirement in actuator safety time in calculating valve element (1) last time；The present invention by the throttling of aperture form will be converted between valve element convex shoulder and valve pocket in a manner of crevice throttle, the measurement error of the parameter in approximate solution and actual processing in the derivation of equation is made up by increasing proportional gain factor, improve the throttling formula of gap stream, to improve the accuracy of design, eliminate traditional orifice restriction, the contamination resistance of actuator is improved, is also the bringing great convenience property of maintenance of follow-up trench actuator.
Description
Technical field
The invention belongs to technical field of hydraulic pressure, is related to the improvement to trench actuator mode conversion selector valve, is applied to
Improve the contamination resistance of actuator during pitting returns.
Background technology
Trench actuator can effectively simplify the communication oil circuit of enclosure interior, improve the integrated level of actuator design so that
The volume of actuator, weight reduction 20% or so.Just because of this advantage, trench actuator is also increasingly used extensively
In the aircraft development of various models.Then middle throttle structure or conventional aperture section are returned due to trench mode conversion valve
Stream, diameter is very high to the susceptibility of pollutant within 0.5mm, and vulnerable to pollution composition granule blocks throttle orifice and reduces actuator
Security.On the other hand, because trench actuator is sealed using the trench valve pocket of interference fit, in pollutant
Extraction valve pocket is required to during the oil circuit of blocking, in follow-up maintenance cleaning pollutant to be cleaned, this process easily scratches shell
Internal hole, the danger for bringing housing to scrap, therefore maintainability is very poor.To solve the problems, such as the contamination resistance of trench actuator,
Avoid extracting the loss that valve pocket brings actuator in follow-up maintenance, the present invention proposes a kind of valve element convex shoulder based on gap stream
Shaft type throttling control actuator return medium velocity.Its core concept is to be converted to the throttling in the form of aperture with valve element convex shoulder
The mode of crevice throttle between valve pocket, improve design, processing, operability, portability and the reliability safeguarded.
The content of the invention
The purpose of the present invention is：A kind of design of the valve element convex shoulder crevice throttle based on gap stream is proposed, is improved trench
Contamination resistance, reliability, the maintainability of actuator.
The technical scheme is that：
Valve design method during trench mode based on gap stream is returned, it is characterised in that comprise the following steps：The first step,
Position in being returned according to the safety of rudder face, determine the center returned mesopore A (4), return mesopore B (6) on trench valve pocket (2)；
Second step, the index request of medium velocity is returned according to actuator, formula is flowed by gap
Calculate and convex shoulder A (3) is controlled in valve element (1) last time, returns middle control convex shoulder B (5)
Diameter, meet actuator safely return in requirement；
In formula, dfFor return in control convex shoulder diameter, D be valve pocket endoporus diameter, Δ P be hydraulic system oil-feed with
The pressure difference of oil return, μ is the viscosity of hydraulic oil, relevant with the temperature of hydraulic oil, the length of control convex shoulder, V during l is backhuiFor start
Medium velocity, A are returned in device requirementactFor actuator pistons bar and the effective active area of pressurized strut endoporus, KaFor proportional gain system
Number.
Convex shoulder length l is controlled to take the half of valve core movement stroke in step 2, in described time.
In step 1, described time mesopore (4), time mesopore B (6) diameter are not less than 1.5mm, to improve the anti-soil of actuator
Dye ability.
It is an advantage of the invention that：The present invention is cleverly by the way that the throttling in the form of aperture is converted to valve element convex shoulder and valve
The mode of crevice throttle between set, made up by increasing proportional gain factor in approximate solution and actual processing in the derivation of equation
Parameter measurement error, improve gap stream throttling formula, to improve the accuracy of design.By controlling valve element to return middle control
The size of convex shoulder come realize actuator return in performance index request.This not only eliminates traditional orifice restriction, improves start
The contamination resistance of device, also it is the bringing great convenience property of maintenance of follow-up trench actuator.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Wherein, valve element (1), valve pocket (2), control convex shoulder A (3), time mesopore A (4), control convex shoulder B (5), time mesopore B (6).
Embodiment
The present invention is described in further details below.Comprise the following steps：
First according to the external interface of actuator, as oil-feed, oil return, control chamber, detector, electromagnetic shut-off valve, pressurized strut,
The interfaces such as servo valve, DDV valves, pass through trench design valve pocket 2；
The first step, according to the home of rudder face be corresponding to actuator time in position, determine the trench last time of valve pocket 2
Mesopore A4, the center for returning mesopore B6, to improve the contamination resistance of actuator, it is not small to return mesopore A4, time mesopore B6 diameters
In 1.5mm；
Second step, the index request of medium velocity is returned according to actuator, returned by the way that the present invention is improved based on gap stream calculation
The formula of middle convex shoulder diameter is：
Wherein dfFor return in control convex shoulder diameter, D be valve pocket endoporus diameter, Δ P be hydraulic system oil-feed with return
The pressure difference of oil, μ are the viscosity (relevant with the temperature of hydraulic oil) of hydraulic oil, the length of control convex shoulder, V during l is backhuiFor start
Medium velocity, A are returned in device requirementactFor actuator pistons bar and the effective active area of pressurized strut endoporus, KaFor proportional gain system
Number.
Because control convex shoulder length is limited by valve core movement stroke in returning, take during the half of valve core movement stroke is used as back
Control the length of convex shoulder.
In one embodiment of the invention, the pressure differential deltap P of hydraulic system is 19.6Mpa, and actuator returns medium velocity Vhui
For (15~27) mm/s, hydraulic oil is that No. 15 aircraft fluids are chilli oil, and its viscosity, mu is 14.06 under normal temperature environmentReturn
The middle length l for controlling convex shoulder is the half i.e. 3.2mm of valve core movement stroke, effective work of actuator pistons bar and pressurized strut endoporus
With area AactFor 1484.049mm2, the diameter D of valve pocket endoporus is 10.001mm, proportional gain factor KaFor 1.12, calculating to return
The diameter d of middle control convex shoulderfFor 9.9329mm.After the diameter design of convex shoulder is controlled in this time, is assembled, returning for actuator is surveyed
Medium velocity is 20.65mm/s, meets back the requirement of medium velocity.
Claims (4)
- Valve design method during 1. the trench mode based on gap stream is returned, it is characterised in that comprise the following steps：The first step, position in being returned according to the safety of rudder face, determine returning mesopore A (4), returning mesopore B (6) on trench valve pocket (2) Center；Second step, the index request of medium velocity is returned according to actuator, formula is flowed by gapCalculate and convex shoulder A (3) is controlled in valve element (1) last time, returns the straight of middle control convex shoulder B (5) Footpath, meet the requirement in actuator safety time；In formula, dfTo return the diameter of middle control convex shoulder, D is the diameter of valve pocket endoporus, and Δ P is the oil-feed and oil return of hydraulic system Pressure difference, μ is the viscosity of hydraulic oil, relevant with the temperature of hydraulic oil, and l be back the middle length for controlling convex shoulder, VhuiWill for actuator That asks returns medium velocity, AactFor actuator pistons bar and the effective active area of pressurized strut endoporus, KaFor proportional gain factor.
- Valve design method during 2. the trench mode according to claim 1 based on gap stream is returned, it is characterised in that step Convex shoulder length l is controlled to take the half of valve core movement stroke in two, in described time.
- Valve design method during 3. the trench mode according to claim 1 based on gap stream is returned, it is characterised in that step In one, the diameter of described time mesopore (4) is not less than 1.5mm, to improve the contamination resistance of actuator.
- Valve design method during 4. the trench mode according to claim 1 based on gap stream is returned, it is characterised in that described The diameter for returning mesopore B (6) is not less than 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710585393.0A CN107524652A (en) | 2017-07-18 | 2017-07-18 | Valve design method during trench mode based on gap stream is returned |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710585393.0A CN107524652A (en) | 2017-07-18 | 2017-07-18 | Valve design method during trench mode based on gap stream is returned |
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| CN107524652A true CN107524652A (en) | 2017-12-29 |
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| CN201710585393.0A Pending CN107524652A (en) | 2017-07-18 | 2017-07-18 | Valve design method during trench mode based on gap stream is returned |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154086A (en) * | 2020-12-30 | 2021-07-23 | 中航工业南京伺服控制系统有限公司 | Double-system three-section split type slide valve pair and control method |
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| CN101403398A (en) * | 2008-11-14 | 2009-04-08 | 天津玖丰重工机械有限公司 | Hydraulic multichannel conversion valve |
| CN103029829A (en) * | 2012-12-27 | 2013-04-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Hydraulic return locking device for dual-redundancy steering engine |
| CN103148065A (en) * | 2013-03-14 | 2013-06-12 | 浙江工业大学 | Laminar flow proportional pressure adjusting mechanism |
| US8851944B1 (en) * | 2012-12-20 | 2014-10-07 | Brp Us Inc. | Marine engine hydraulic system |
| CN104386243A (en) * | 2014-10-15 | 2015-03-04 | 中国航空工业集团公司沈阳飞机设计研究所 | Failure neutral-position return mechanism for steering engine of airplane |
| CN105508332A (en) * | 2014-09-26 | 2016-04-20 | 中国航空工业第六一八研究所 | Assembly technical method of mode selecting valve based on interference fit seal |
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2017
- 2017-07-18 CN CN201710585393.0A patent/CN107524652A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403398A (en) * | 2008-11-14 | 2009-04-08 | 天津玖丰重工机械有限公司 | Hydraulic multichannel conversion valve |
| US8851944B1 (en) * | 2012-12-20 | 2014-10-07 | Brp Us Inc. | Marine engine hydraulic system |
| CN103029829A (en) * | 2012-12-27 | 2013-04-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Hydraulic return locking device for dual-redundancy steering engine |
| CN103148065A (en) * | 2013-03-14 | 2013-06-12 | 浙江工业大学 | Laminar flow proportional pressure adjusting mechanism |
| CN105508332A (en) * | 2014-09-26 | 2016-04-20 | 中国航空工业第六一八研究所 | Assembly technical method of mode selecting valve based on interference fit seal |
| CN104386243A (en) * | 2014-10-15 | 2015-03-04 | 中国航空工业集团公司沈阳飞机设计研究所 | Failure neutral-position return mechanism for steering engine of airplane |
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| 许贤良等: "同心环形缝隙流理论研究", 《安徽理工大学学报（自然科学版）》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154086A (en) * | 2020-12-30 | 2021-07-23 | 中航工业南京伺服控制系统有限公司 | Double-system three-section split type slide valve pair and control method |
| CN113154086B (en) * | 2020-12-30 | 2023-01-17 | 中航工业南京伺服控制系统有限公司 | Double-system three-section split type slide valve pair and control method |
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Application publication date: 20171229 |