CN110030231B - Online adjusting device of electro-hydraulic servo valve - Google Patents
Online adjusting device of electro-hydraulic servo valve Download PDFInfo
- Publication number
- CN110030231B CN110030231B CN201910334587.2A CN201910334587A CN110030231B CN 110030231 B CN110030231 B CN 110030231B CN 201910334587 A CN201910334587 A CN 201910334587A CN 110030231 B CN110030231 B CN 110030231B
- Authority
- CN
- China
- Prior art keywords
- electro
- servo valve
- hydraulic servo
- zero
- slide bar
- 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.)
- Active
Links
Images
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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- 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
- F15B2211/855—Testing of fluid pressure systems
Abstract
The invention relates to the technical field of electro-hydraulic servo valve assembly and adjustment, and particularly discloses an online assembly and adjustment device of an electro-hydraulic servo valve, wherein the online assembly and adjustment device of the electro-hydraulic servo valve comprises: the two zero-offset adjusting mechanisms are symmetrically arranged and connected through a connecting mechanism, an electro-hydraulic servo valve is arranged between the two zero-offset adjusting mechanisms, the two zero-offset adjusting mechanisms are respectively connected with locking nails on two sides of the electro-hydraulic servo valve, each zero-offset adjusting mechanism is provided with an oil way, and the two zero-offset adjusting mechanisms can adjust the locking nails of the electro-hydraulic servo valve to perform zero-offset adjustment on the electro-hydraulic servo valve. The online adjusting device of the electro-hydraulic servo valve provided by the invention realizes the test of the jet-flow level pressure gain under the condition of not disassembling the front level of the servo valve, and can quickly adjust the zero offset under the normal oil supply condition, thereby avoiding repeated disassembly and assembly and improving the zero offset adjusting efficiency.
Description
Technical Field
The invention relates to the technical field of electro-hydraulic servo valve assembly and adjustment, in particular to an online assembly and adjustment device of an electro-hydraulic servo valve.
Background
The electro-hydraulic servo valve is a core precise control element in a servo system, wherein the jet electro-hydraulic servo valve with the characteristics of failure centering, strong anti-pollution capability and the like is widely applied to the field of aerospace at present.
The jet type electrohydraulic servo valve mainly comprises a jet pipe type and a jet deflector type, and the main working parts of the jet type electrohydraulic servo valve can be divided into a jet flow preposed stage and a power slide valve stage. During the step-by-step adjustment process of the servo valve, the pressure gain of the jet flow prestage determines indexes such as the resolution ratio of the power stage, and the zero offset is one of basic indexes of the servo valve.
For testing the pressure gain of the jet flow stage, the test is realized by the independent test of the motor stage at present, or cover plates at two ends of the whole valve are replaced by measuring tools; on the other hand, for the electro-hydraulic servo valve with the valve core locking pin structure, zero-offset adjustment can only be performed in an off-line state without oil passing, a debugging environment has a certain difference with an actual working condition, after the debugging is completed, the oil passing test of the servo valve needs to be performed, the whole process needs to be repeatedly disassembled and assembled, and the efficiency is very low. For the two steps, both the installation and adjustment of a new valve and the troubleshooting and repair of a fault valve are time-consuming and labor-consuming.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art, and provides an online adjusting device of an electro-hydraulic servo valve, so as to solve the problems in the prior art.
As one aspect of the present invention, there is provided an online adjusting apparatus of an electro-hydraulic servo valve, wherein the online adjusting apparatus of the electro-hydraulic servo valve includes: the two zero-offset adjusting mechanisms are symmetrically arranged and connected through a connecting mechanism, an electro-hydraulic servo valve is arranged between the two zero-offset adjusting mechanisms, the two zero-offset adjusting mechanisms are respectively connected with locking nails on two sides of the electro-hydraulic servo valve, each zero-offset adjusting mechanism is provided with an oil way, and the two zero-offset adjusting mechanisms can adjust the locking nails of the electro-hydraulic servo valve to perform zero-offset adjustment on the electro-hydraulic servo valve.
Preferably, the zero offset adjustment mechanism comprises: the electro-hydraulic servo valve comprises a coarse adjustment slide bar, a fine adjustment slide bar and an end cover, wherein the fine adjustment slide bar is arranged in the coarse adjustment slide bar, one end of the coarse adjustment slide bar is connected with the electro-hydraulic servo valve, and the other end of the coarse adjustment slide bar is arranged in the end cover.
Preferably, one end of the coarse adjustment slide rod is provided with a stop block, and the stop block is connected with a valve core of the electro-hydraulic servo valve.
Preferably, one end of the coarse adjustment slide bar is provided with a threaded through hole, and the stop block is arranged in the threaded through hole.
Preferably, the outer surface of each coarse adjustment slide bar is provided with a plurality of slide bars, the inner surface of each end cover is provided with slide rails with the same number as the slide bars, and the slide bars on the coarse adjustment slide bars are all positioned in the slide rails on the end covers.
Preferably, zero-offset adjusting mechanism still includes and twists the lid, turn round the lid with the end cover is connected, it is provided with the hole to twist to cover, it can promote the coarse adjustment slide bar motion to twist the lid under the exogenic action.
Preferably, a first sealing structure is arranged between the coarse adjustment slide bar and the fine adjustment slide bar.
Preferably, the online adjusting device of the electro-hydraulic servo valve further comprises two symmetrically arranged pressure gain testing modules, the two pressure gain testing modules are arranged on the connecting mechanism, and the two pressure gain testing modules are respectively used for acquiring pressure data at two ends of the electro-hydraulic servo valve and sending the acquired pressure data to an upper computer for processing.
Preferably, the pressure gain test module includes the test body and sets up pressure sensor and collection integrated circuit board on the test body, the test body sets up on the coupling mechanism, pressure sensor is used for gathering the pressure data of electro-hydraulic servo valve, gather the integrated circuit board be used for with the pressure data transmission that pressure sensor gathered send to the host computer.
Preferably, the connection mechanism comprises a bolt.
According to the online assembly and adjustment device of the electro-hydraulic servo valve, the zero-offset adjustment mechanisms are symmetrically arranged on the two sides of the electro-hydraulic servo valve, the oil passages are arranged, the position of the valve core can be adjusted and the feedback rod ball can be clamped under the oil passing condition, the device is pushed open by using the oil pressure during oil passing after the oil passing is completed, the normal test environment of the servo valve is ensured, the test of jet-level pressure gain is realized under the condition that the front stage of the servo valve is not disassembled, meanwhile, the zero offset can be quickly adjusted under the normal oil supplying condition, repeated disassembly and assembly are avoided, and the zero-offset adjustment efficiency is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an online adjusting device of an electro-hydraulic servo valve provided by the invention.
Fig. 2 is a schematic structural diagram of an embodiment of an online adjustment device of an electro-hydraulic servo valve provided by the invention.
FIG. 3 is a schematic view of a coarse slide bar according to the present invention.
Fig. 4 is a schematic structural diagram of the end cap provided by the present invention.
Fig. 5 is a schematic structural diagram of the twist cap provided by the present invention.
Fig. 6 is a schematic structural diagram of a zero-offset adjusting assembly provided by the present invention.
Fig. 7 is a schematic structural diagram of a pressure gain testing module provided in the present invention.
FIG. 8 is a block diagram of an online adjustment device for an electro-hydraulic servo valve according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As one aspect of the present invention, there is provided an online adjusting apparatus of an electro-hydraulic servo valve, wherein, as shown in fig. 1, the online adjusting apparatus 10 of the electro-hydraulic servo valve includes: the two zero-offset adjusting mechanisms 110 are symmetrically arranged, the two zero-offset adjusting mechanisms 110 are connected through a connecting mechanism 120, the two zero-offset adjusting mechanisms 110 are used for arranging the electro-hydraulic servo valve 20, the two zero-offset adjusting mechanisms 110 are respectively connected with locking pins on two sides of the electro-hydraulic servo valve 20, each zero-offset adjusting mechanism 110 is provided with an oil way, and the two zero-offset adjusting mechanisms 110 can adjust the locking pins of the electro-hydraulic servo valve 20 so as to perform zero-offset adjustment on the electro-hydraulic servo valve.
According to the online assembly and adjustment device of the electro-hydraulic servo valve, the zero-offset adjustment mechanisms are symmetrically arranged on the two sides of the electro-hydraulic servo valve, the oil passages are arranged, the position of the valve core can be adjusted and the feedback rod ball can be clamped under the oil passing condition, the device is pushed open by using the oil pressure during oil passing after the oil passing is completed, the normal test environment of the servo valve is ensured, the test of jet-level pressure gain is realized under the condition that the front stage of the servo valve is not disassembled, meanwhile, the zero offset can be quickly adjusted under the normal oil supplying condition, repeated disassembly and assembly are avoided, and the zero-offset adjustment efficiency is improved.
Specifically, as shown in fig. 2, the zero offset adjustment mechanism 110 includes: the electro-hydraulic servo valve comprises a rough adjusting slide bar 111, a fine adjusting slide bar 112 and an end cover 113, wherein the fine adjusting slide bar 112 is arranged in the rough adjusting slide bar 111, one end of the rough adjusting slide bar 111 is connected with the electro-hydraulic servo valve 20, and the other end of the rough adjusting slide bar 111 is arranged in the end cover 113.
Specifically, a stopper 114 is disposed at one end of the coarse adjustment slide bar 111, and the stopper 114 is connected to the spool of the electro-hydraulic servo valve 20.
Specifically, as shown in FIG. 3, to accomplish the installation of stop 114, one end of coarse slide 111 is provided with a threaded through hole 116, and stop 114 is disposed within threaded through hole 116.
Specifically, as shown in fig. 3 and 4, in order to realize the connection between the coarse adjustment slide bar 111 and the end cover 113, a plurality of slide bars 117 are disposed on the outer surface of the coarse adjustment slide bar 111, slide rails 118 with the same number as the slide bars are disposed on the inner surface of the end cover 113, and the slide bars 117 on the coarse adjustment slide bar 111 are all located in the slide rails 118 on the end cover 113.
As shown in fig. 4, the end cap 113 is further provided with a set screw arc groove 1131, and the set screw arc groove 1131 is used for rotating the end cap, so that the stopper 114 on the coarse tuning slide bar 111 is clamped in the valve core end surface groove of the electro-hydraulic servo valve; the inner surface is provided with four sliding rails for mounting the rough adjusting sliding rod 111, so as to ensure that the rough adjusting sliding rod 111 can only do axial linear motion.
Specifically, as shown in fig. 2 and 5, the zero offset adjustment mechanism 110 further includes a twist cover 119, the twist cover 119 is connected to the end cover 113, an inner hole 1191 is formed in the twist cover 119, and the twist cover 119 can push the rough adjustment sliding rod 111 to move under the action of an external force.
Specifically, the twist cap 119 is in threaded connection with the end cap 113 and is used for pushing the rough adjusting slide rod 111; the bore 1191 is used to extend into a wrench to push the fine adjustment slide 112 to secure the locking pin in the electro-hydraulic servo valve 20.
As shown in fig. 3, which is a schematic structural diagram of a coarse adjustment slide bar, 4 slide bars are arranged on the outer surface of the coarse adjustment slide bar and are used for being installed in an end cover 113 to ensure axial linear motion; one end of which is provided with two threaded through holes for mounting the stopper 114. In operation, the valve core is pushed by the twist cap 119 to move axially, and finally the valve core is clamped.
When the pressure gain testing device is installed, the fine adjustment slide rod 112 is installed in the coarse adjustment slide rod 111, then the fine adjustment slide rod and the coarse adjustment slide rod are installed in the end cover 113, the threaded end of the end cover 113 is screwed into the torsion cover 119, one end of the end cover 113, which is far away from the threaded end, is connected with the pressure gain testing module 130, and finally the stop block 114 is installed on the threaded through hole of the coarse adjustment slide rod 111; the cover plates at two ends of the electro-hydraulic servo valve 20 and the plugs at two ends of the valve core are removed and replaced by the zero-offset adjusting mechanism 110, and the end cover 113 is properly rotated during installation, so that the stop block 114 is clamped in the groove at the end face of the valve core.
As shown in FIG. 6, it is an assembly diagram of the rough adjusting slide bar 111, the fine adjusting slide bar 112 and the stopper 114, wherein one end of the fine adjusting slide bar 112 is opened with a rectangular slot 1121 for matching with a tool such as a wrench, and the shape of the other end of the fine adjusting slide bar 112 is designed to realize the functions of a wrench such as a hexagon, a straight line or a cross according to the condition of the locking pin in the electro-hydraulic servo valve spool.
To achieve sealing, a first sealing structure is disposed between the coarse adjustment slide 111 and the fine adjustment slide 112.
In order to simultaneously realize the pressure test, as shown in fig. 1 and fig. 2, the online adjusting device of the electro-hydraulic servo valve further includes two symmetrically arranged pressure gain test modules 130, both the two pressure gain test modules 130 are arranged on the connecting mechanism 120, and the two pressure gain test modules are respectively used for acquiring pressure data at both ends of the electro-hydraulic servo valve 20 and sending the acquired pressure data to an upper computer for processing.
Specifically, as shown in fig. 7, the pressure gain test module 130 includes a test body 131, and a pressure sensor and an acquisition board card which are arranged on the test body 131, the test body is arranged on the connection mechanism 120, the pressure sensor is used for acquiring pressure data of the electro-hydraulic servo valve 20, and the acquisition board card is used for sending the pressure data acquired by the pressure sensor to the upper computer.
It can be understood that, when the prestage pressure gain test is performed, the pressures at the two ends of the valve core of the electro-hydraulic servo valve 20 are collected by the pressure sensor and transmitted to the upper computer for processing through the data collecting board card, and finally, the interface visualization of data points, data curves and test reports is realized; and simultaneously, zero offset adjustment is carried out, the electro-hydraulic servo valve is tested to be in a normal power-on oil supply state, and the zero position of the valve core of the electro-hydraulic servo valve 20 is determined according to the load flow of the ports 1 and 2 displayed by the flow meter.
Preferably, the connection mechanism 120 includes a bolt.
Specifically, as shown in fig. 2, the connecting mechanism 120 includes two bolts, and preferably, the bolts may be long bolts.
As shown in fig. 7, the pressure gain testing module 120 is fixed by long bolts symmetrically disposed on both sides of the electro-hydraulic servo valve 20, and a middle through hole of the pressure gain testing module 120 is used for leading out a testing oil path and placing a rough adjusting sliding rod 111.
When the jet-flow stage pressure gain is tested, the end cover is provided with a deep hole for guiding oil ways of two cavities of the jet-flow stage, the upper end of the end cover is used for installing a pressure sensor, and an output electric signal of the pressure sensor is collected by the collecting board card and is subjected to post-processing through an upper computer.
When the servo valve is adjusted to be zero offset, as shown in fig. 2 and 8, firstly, the twist cover is rotated to push the rough adjusting slide rod 111 to carry out rough adjustment, the rough adjusting position of the valve core is judged by a flow meter of a hydraulic platform, and the position of the valve core is adjusted under the condition of given current to ensure that the load flow is zero; then, the fine adjustment slide bar 112 is pushed, the position of the feedback rod is fixed by matching with two locking nails in the valve core, the fine adjustment slide bar 112 is pushed back by oil hydraulic pressure after being fixed, the rotary torsion cover 119 is rotated, the coarse adjustment slide bar 111 is also pushed back by the oil hydraulic pressure, and whether the zero deviation position is qualified or not is observed: if the zero offset is qualified, zero offset adjustment is completed; if not, repeating the process, finely adjusting the locking degree of the locking nail, continuously observing after loosening, and repeating the process until the zero deviation position is qualified.
As shown in fig. 8, when the zero offset adjustment is performed, it is necessary to input the oil supply pressure signal P, the oil return pressure signal P, and the current signal I to the electro-hydraulic servo valve 20, and determine whether or not the zero offset position is acceptable based on the output flow rate signal Q.
Therefore, the online adjusting device of the electro-hydraulic servo valve provided by the invention realizes the test of the pre-stage pressure gain and the maximum slide valve driving force under the condition of not disassembling the torque motor, and avoids the state change of the electro-hydraulic servo valve caused by the disassembly and the assembly; the online zero offset adjustment of the servo valve is realized, the zero offset is debugged under the oil supply environment of the electro-hydraulic servo valve to ensure more accurate zero position, and meanwhile, the repeated disassembly and assembly of the servo valve are avoided, and the efficiency is improved.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (9)
1. An on-line regulating device of an electro-hydraulic servo valve, characterized by comprising: the two zero-offset adjusting mechanisms are symmetrically arranged, connected through a connecting mechanism and used for arranging an electro-hydraulic servo valve, and are respectively connected with locking nails at two sides of the electro-hydraulic servo valve;
wherein, zero offset adjustment mechanism includes: the electro-hydraulic servo valve comprises a coarse adjustment slide bar, a fine adjustment slide bar and an end cover, wherein the fine adjustment slide bar is arranged in the coarse adjustment slide bar, one end of the coarse adjustment slide bar is connected with the electro-hydraulic servo valve, and the other end of the coarse adjustment slide bar is arranged in the end cover.
2. The on-line adjustment device of the electro-hydraulic servo valve as claimed in claim 1, wherein a stop is disposed at one end of the coarse adjustment slide bar, and the stop is connected to a spool of the electro-hydraulic servo valve.
3. The on-line adjustment device of the electro-hydraulic servo valve as claimed in claim 2, wherein a threaded through hole is formed at one end of the coarse adjustment slide bar, and the stopper is disposed in the threaded through hole.
4. The on-line adjustment device of the electro-hydraulic servo valve as claimed in claim 1, wherein the outer surface of the coarse adjustment slide bar is provided with a plurality of slide bars, the inner surface of the end cap is provided with a plurality of slide rails with the same number as the slide bars, and the slide bars on the coarse adjustment slide bar are all positioned in the slide rails on the end cap.
5. The on-line adjustment device of the electro-hydraulic servo valve of claim 1, wherein the zero-offset adjustment mechanism further comprises a torsion cover, the torsion cover is connected with the end cover, an inner hole is formed in the torsion cover, and the torsion cover can push the rough adjustment sliding rod to move under the action of external force.
6. The on-line installation and adjustment device of an electro-hydraulic servo valve as claimed in claim 1, wherein a first sealing structure is provided between the coarse adjustment slide and the fine adjustment slide.
7. The on-line adjusting device of the electro-hydraulic servo valve as claimed in any one of claims 1 to 6, further comprising two symmetrically arranged pressure gain testing modules, wherein the two pressure gain testing modules are both arranged on the connecting mechanism, and are respectively used for collecting pressure data at two ends of the electro-hydraulic servo valve and sending the collected pressure data to an upper computer for processing.
8. The on-line adjustment device of the electro-hydraulic servo valve of claim 7, wherein the pressure gain test module comprises a test body, and a pressure sensor and an acquisition board card which are arranged on the test body, the test body is arranged on the connecting mechanism, the pressure sensor is used for acquiring pressure data of the electro-hydraulic servo valve, and the acquisition board card is used for sending the pressure data acquired by the pressure sensor to the upper computer.
9. The in-line fitting apparatus of an electro-hydraulic servo valve of claim 1, wherein the connection mechanism comprises a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910334587.2A CN110030231B (en) | 2019-04-24 | 2019-04-24 | Online adjusting device of electro-hydraulic servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910334587.2A CN110030231B (en) | 2019-04-24 | 2019-04-24 | Online adjusting device of electro-hydraulic servo valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110030231A CN110030231A (en) | 2019-07-19 |
| CN110030231B true CN110030231B (en) | 2020-11-27 |
Family
ID=67239973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910334587.2A Active CN110030231B (en) | 2019-04-24 | 2019-04-24 | Online adjusting device of electro-hydraulic servo valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110030231B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555232B (en) * | 2020-12-10 | 2022-09-13 | 上海航天控制技术研究所 | Method and system for stack debugging of triple redundant electro-hydraulic servo valve |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0599203A (en) * | 1991-10-09 | 1993-04-20 | Toshiba Corp | Control device for hydraulic servo valve |
| CN2926619Y (en) * | 2006-03-02 | 2007-07-25 | 上海诺玛液压系统有限公司 | Electrohydraulic servo valve |
| CN101482131A (en) * | 2008-01-08 | 2009-07-15 | 鞍钢股份有限公司 | On-line equalization internal leaking electric zero-adjusting method of servo valve |
| CN201439842U (en) * | 2008-12-19 | 2010-04-21 | 上海诺玛液压系统有限公司 | Electro-hydraulic servo valve sensor displacement and flow relation measuring fixture |
| CN102192834A (en) * | 2010-03-18 | 2011-09-21 | 上海航新航宇机械技术有限公司 | Functional detecting device of special structure servo valve in A320 airplane |
| CN202579459U (en) * | 2012-05-16 | 2012-12-05 | 天津邦通机电科技有限公司 | Servo valve testing system |
| CN103090049A (en) * | 2011-10-27 | 2013-05-08 | 北京精密机电控制设备研究所 | Novel spool structure |
| CN104948539A (en) * | 2015-06-30 | 2015-09-30 | 付建文 | Hydraulic control system |
| CN105909587A (en) * | 2016-07-06 | 2016-08-31 | 上海衡拓液压控制技术有限公司 | Force feedback structure for electro-hydraulic servo valve |
| CN206309696U (en) * | 2016-11-25 | 2017-07-07 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of electrohydraulic servo valve balancing controls |
-
2019
- 2019-04-24 CN CN201910334587.2A patent/CN110030231B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0599203A (en) * | 1991-10-09 | 1993-04-20 | Toshiba Corp | Control device for hydraulic servo valve |
| CN2926619Y (en) * | 2006-03-02 | 2007-07-25 | 上海诺玛液压系统有限公司 | Electrohydraulic servo valve |
| CN101482131A (en) * | 2008-01-08 | 2009-07-15 | 鞍钢股份有限公司 | On-line equalization internal leaking electric zero-adjusting method of servo valve |
| CN201439842U (en) * | 2008-12-19 | 2010-04-21 | 上海诺玛液压系统有限公司 | Electro-hydraulic servo valve sensor displacement and flow relation measuring fixture |
| CN102192834A (en) * | 2010-03-18 | 2011-09-21 | 上海航新航宇机械技术有限公司 | Functional detecting device of special structure servo valve in A320 airplane |
| CN103090049A (en) * | 2011-10-27 | 2013-05-08 | 北京精密机电控制设备研究所 | Novel spool structure |
| CN202579459U (en) * | 2012-05-16 | 2012-12-05 | 天津邦通机电科技有限公司 | Servo valve testing system |
| CN104948539A (en) * | 2015-06-30 | 2015-09-30 | 付建文 | Hydraulic control system |
| CN105909587A (en) * | 2016-07-06 | 2016-08-31 | 上海衡拓液压控制技术有限公司 | Force feedback structure for electro-hydraulic servo valve |
| CN206309696U (en) * | 2016-11-25 | 2017-07-07 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of electrohydraulic servo valve balancing controls |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110030231A (en) | 2019-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105697353B (en) | A kind of variable working condition Hydraulic pump fault simulation and state-detection combined test apparatus | |
| EP2153495B1 (en) | Hybrid universal distribution system comprising electrical, fluid, and communication functions | |
| CN110030231B (en) | Online adjusting device of electro-hydraulic servo valve | |
| EP2102728B1 (en) | Method and device for diagnosis of the condition of a machine component | |
| WO2012122996A1 (en) | Module arrangement | |
| CN104494811A (en) | Servo pitch control device for screw propeller | |
| CA2917240C (en) | Programmable actuator simulation card | |
| EP4036543A1 (en) | Pressure sensor | |
| DE102011115650B4 (en) | Method for diagnosing the condition of a hydrostatic displacement machine and hydraulic arrangement with hydrostatic displacement machine | |
| AT411973B (en) | METHOD FOR OPERATING A WELDING DEVICE OR A WELDING SYSTEM | |
| CN112659017B (en) | Pipeline connecting piece axial error simulation assembly device and testing method thereof | |
| CN103994711A (en) | Apparatus and method for testing off-line performance of magnetostrictive displacement sensor | |
| CH700689A1 (en) | Multi-sensor head. | |
| EP3161952B1 (en) | Switching power supply with web interface | |
| DE19631289A1 (en) | Testing second data exchange protocol converter using identical first protocol converter for computer systems | |
| CN107339306A (en) | A kind of dowel device of locking function | |
| CN110238644B (en) | Butt joint tool and butt joint adjusting method for main valve steam inlet pipe and high-pressure cylinder steam inlet pipe | |
| CN109580139B (en) | Servo valve armature subassembly comprehensive rigidity testing arrangement | |
| CN111521382A (en) | High-precision fatigue test tool | |
| DE10259394A1 (en) | Device for diagnosing the condition of a fluid technology component, in particular a fluidic cylinder | |
| DE102015103903A1 (en) | Power wrench with direct rotation angle and / or torque measurement | |
| CN213516343U (en) | A detecting system for connecting rod assembly final moment | |
| CN202498409U (en) | Dynamic characteristic detection device for feeding system of PCB drilling machine | |
| EP1772720A2 (en) | Remote diagnostics system and method for diagnosing a floor conveyor remotely | |
| CN105987808A (en) | Separator and nozzle holding-clamping testing device for heavy water reactor loader-unloader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |