CN104930008A - Hydraulic servo valve and hydraulic servo system - Google Patents
Hydraulic servo valve and hydraulic servo system Download PDFInfo
- Publication number
- CN104930008A CN104930008A CN201510238990.7A CN201510238990A CN104930008A CN 104930008 A CN104930008 A CN 104930008A CN 201510238990 A CN201510238990 A CN 201510238990A CN 104930008 A CN104930008 A CN 104930008A
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- CN
- China
- Prior art keywords
- valve
- boss
- hydraulic servo
- hydraulic
- spool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Servomotors (AREA)
Abstract
The invention provides a hydraulic servo valve and a hydraulic servo system, and belongs to the field of hydraulic control. The hydraulic servo valve comprises a valve body (1) and a valve element (2). Two circular beads of the valve element (2) are each provided with a boss (3) and a boss (4). Through optimization design on the structure of the valve element of the hydraulic servo valve, the valve element (2) is buffered to a certain degree when opened or closed, the transfer fluctuation amplitude is reduced, and the work stability of the hydraulic servo system is improved.
Description
Technical field
The present invention relates to a kind of hydraulic efficiency servo-valve and a kind of Hydrauservo System, wherein, hydraulic efficiency servo-valve is a kind of hydraulic servovalve with anti-reversing impact function, belongs to field of hydraulic control.
Technical background
Hydraulic efficiency servo-valve is that output quantity becomes certain function relation and the hydraulic control valve that can respond fast with input quantity, is the core component of Hydrauservo System.This hydraulic efficiency servo-valve belongs to hydraulic servovalve by input signal, hydraulic servovalve is the machine liquid conversion element low power machinery action being changed into hydraulic pressure output quantity (flow or pressure), belong to sliding valve style from structure, the booster of the copying device of the steering wheel of boats and ships, lathe, aircraft is applied the earliest.
In prior art, hydraulic efficiency servo-valve spool land place is set to maintain an equal level with valve body openings place, in the course of the work, produce larger transmission fluctuation, because hydraulic servovalve has feedback function, closed-loop system is made easily to cause system unstable, such as, when feedback effect in movement process makes control mouth opening reach zero, oil hydraulic cylinder but can not stop motion immediately because of motional inertia, and control mouth reverse opening, oil hydraulic cylinder will do reversing motion again.Under certain condition, oil hydraulic cylinder may be to-and-fro motion and can not stopping near zero at control mouth, and this instability more easily occurs when large discharge, high speed, and whole system cannot be worked.
Summary of the invention
The present invention is directed to problems of the prior art and deficiency, a kind of hydraulic efficiency servo-valve with anti-reversing impact function is provided.
The present invention realizes in the following way:
On the one hand, provide a kind of hydraulic efficiency servo-valve, be assembled by valve body 1 and spool 2, be equipped with a boss 3 and 4 at this spool 2 two shoulder places;
Preferably, described boss 3 and/or boss 4 are non-right angle cross section along the axial cross section of spool 2;
Preferably, described boss 3 and/or boss 4 are curved section along spool 2 axial cross section;
Preferably, described boss 3 and/or boss 4 are the conical surface of the straight in cross-section formation of multistage different amount along spool 2 axial cross section;
On the other hand, present invention also offers a kind of Hydrauservo System, the hydraulic efficiency servo-valve that this system adopts above-mentioned arbitrary technological scheme to provide.
Beneficial effect of the present invention is: by the optimal design to servovalve structure, can reach effective and improve servovalve working stability and reliability object; Further reduction hydraulic work system wave properties, improves system works stability.
Accompanying drawing explanation
Fig. 1 is: hydraulic efficiency servo-valve structural representation.
Fig. 2 is: Hydrauservo System functional schematic.
In figure, 1 valve body, 2 spools, 3 boss, 4 boss, 5 T chambeies, 6 fuel tanks, 7 control mouth, 8 A chambeies, 9 control mouths, 10 P chambeies, 11 cylinder bodies, 12 cylinder rods, 13 pressure oils, 14 rod chambers, 15 rodless cavities.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, makes technological scheme of the present invention and effect easy to understand.
The servo-system be made up of hydraulic efficiency servo-valve and oil hydraulic cylinder, the pressure oil 13 that oil hydraulic pump comes enters hydraulic efficiency servo-valve, on the spool 2 of hydraulic efficiency servo-valve, on two shoulders and valve body, two undercut grooves just in time overlap when meta, and its two of being formed control mouths 7,9 and are in closed condition; When mechanical straps movable valve plug 2 depart from meta move upward time, control mouth 9 to open, the pressure oil in P chamber 10 enters rodless cavity 15 after controlling mouth 9 to A chamber 8, and the oil of rod chamber 14 flows back to P chamber 10, at this moment cylinder rod 12 moves upward, and its movement velocity is directly proportional to control mouth openings of sizes.
Equally, when spool 2 depart from meta downward time, control mouth 7 and open, pressure oil enters rod chamber 14, and the oil of rodless cavity 15 flows into T chamber 5 oil sump tank 6 through A chamber 8 by controlling mouth 7, and at this moment, cylinder rod 12 and valve body 1 move downward simultaneously.
So, the control valve not only moving direction of hydraulic control cylinder but also the movement velocity of hydraulic control cylinder, because cylinder body 11 maintains static, hydraulic servo valve body 1 and cylinder rod 12 are connected as a single entity, when control mouth 7 or 9 is opened, hydraulic servo valve body 1 and cylinder rod 12 also accompany movement, constitute a servo-system.
The present invention and traditional servo system unlike, when spool 2 moves up or down, control mouth 7 or 9 not throw open, but the conical surface (boss) that the straight line passing through curved surface or the different amount increased is formed, that slows down control mouth in advance opens or closes speed, makes its mild opening or closing.This measure can absorb the inertia energy of a part, thus reduces impact, and resolution system reversing impact problem, meets the requirement of system to stability.
More than show and describe the basic principle of invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1. a hydraulic efficiency servo-valve, is assembled by valve body (1) and spool (2), it is characterized in that: (2) two shoulder places are equipped with a boss (3) and boss (4) at this spool.
2. hydraulic efficiency servo-valve as claimed in claim 1, is characterized in that: described boss (3) and/or boss (4) are non-right angle cross section along the axial cross section of spool (2).
3. hydraulic efficiency servo-valve as claimed in claim 2, is characterized in that: described boss (3) and/or boss (4) are curved section along spool (2) axial cross section.
4. hydraulic efficiency servo-valve as claimed in claim 2, is characterized in that: the conical surface that described boss (3) and/or boss (4) are formed along the straight in cross-section that spool (2) axial cross section is multistage different amount.
5. a Hydrauservo System, is characterized in that: adopt as arbitrary in Claims 1-4 as described in hydraulic efficiency servo-valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510238990.7A CN104930008A (en) | 2014-12-31 | 2015-05-12 | Hydraulic servo valve and hydraulic servo system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420865629 | 2014-12-31 | ||
| CN2014208656298 | 2014-12-31 | ||
| CN201510238990.7A CN104930008A (en) | 2014-12-31 | 2015-05-12 | Hydraulic servo valve and hydraulic servo system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104930008A true CN104930008A (en) | 2015-09-23 |
Family
ID=54117345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510238990.7A Pending CN104930008A (en) | 2014-12-31 | 2015-05-12 | Hydraulic servo valve and hydraulic servo system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104930008A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989956A (en) * | 2019-03-27 | 2019-07-09 | 银川市长城液压有限责任公司 | A kind of hydraulic valve and hydraulic system |
-
2015
- 2015-05-12 CN CN201510238990.7A patent/CN104930008A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989956A (en) * | 2019-03-27 | 2019-07-09 | 银川市长城液压有限责任公司 | A kind of hydraulic valve and hydraulic system |
| CN109989956B (en) * | 2019-03-27 | 2024-03-22 | 银川市长城液压有限责任公司 | Hydraulic valve and hydraulic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150923 |
|
| RJ01 | Rejection of invention patent application after publication |