CN106402077A - Hydraulic actuator cylinder output speed controllable hydraulic loop system - Google Patents
Hydraulic actuator cylinder output speed controllable hydraulic loop system Download PDFInfo
- Publication number
- CN106402077A CN106402077A CN201611078550.0A CN201611078550A CN106402077A CN 106402077 A CN106402077 A CN 106402077A CN 201611078550 A CN201611078550 A CN 201611078550A CN 106402077 A CN106402077 A CN 106402077A
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- valve
- pressurized strut
- oil
- piston rod
- Prior art date
Links
- 239000003921 oils Substances 0.000 claims abstract description 29
- 239000010720 hydraulic oils Substances 0.000 claims abstract description 12
- 230000002457 bidirectional Effects 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 239000007788 liquids Substances 0.000 claims description 5
- 230000001808 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reactions Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000012141 concentrates Substances 0.000 claims description 2
- 238000005755 formation reactions Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 210000001503 Joints Anatomy 0.000 description 3
- 238000005516 engineering processes Methods 0.000 description 2
- 280000708357 Housing 21 companies 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering Effects 0.000 description 1
- 238000006243 chemical reactions Methods 0.000 description 1
- 239000000686 essences Substances 0.000 description 1
- 239000000203 mixtures Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/004—Fluid pressure supply failure
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/008—Valve failure
Abstract
Description
Technical field
The present invention relates to a kind of hydraulic pressure retractable actuating cylinder assembly that power is provided for receiving/releasing, and can reliably be parked in maintenance The hydraulic actuator class output speed controlled hydraulic circuit system of position.
Background technology
Hydraulic actuator is hydraulic actuator during one kind is met an urgent need back, including cylinder, lining, piston, rubber seal etc. zero Part, pressurized strut is hydraulicdriven executive component, and pressure executive component is a kind of hydraulic pressure unit done work to external world in hydraulic system Part, hydraulic energy is directly converted into mechanical energy by it.Hydraulic actuator is divided into two big class, and a class is rotary motion (as hydraulic pressure Motor), it is the Hydraulic Elements that hydraulic energy is converted into rotating mechanical energy, another kind of for reciprocating motion type, be wherein divided into past again Linear motion type (as pressurized strut) it be the Hydraulic Elements that hydraulic energy is converted into straight reciprocating motion kinetic energy, and toward rereeling Pendular motion type (oscillating cylinder) two class.Pressurized strut is also called hydraulic cylinder, is a common class executive component in Hydraulic Power Transmission System, is It is used for realizing operating mechanism's straight reciprocating motion or the energy conversion device less than 360 ° of oscillating motions.The basic composition of pressurized strut Substantially it is made up of parts such as cylinder 14, piston, piston rod 16, end cap, sealing, inlet and outlet pipings.The operation principle of pressurized strut is to work as When cylinder is fixing, if cylinder left chamber input service liquid-liquid pressure rise is arrived enough to overcome extraneous load, piston begin to Right motion.If continuously supplying fluid, piston is continuously moved with certain speed.It can thus be appreciated that the thing of pressurized strut work Reason essence is to overcome load (inclusion frictional force) using fluid pressure, maintains movement velocity using fluid flow.Hydraulic pressure is made Dynamic cylinder (hydraulic cylinder) version has piston cylinder, plunger case and oscillating cylinder three major types.Piston-type hydraulic cylinder, dual-rod hydraulic cylinder, double Bar hydraulic cylinder is the hydraulic cylinder that piston two ends all carry piston rod 16, and the former approximates piston effective travel at movable workbench scope Three times be usually used in middle-size and small-size equipment, the such as lifting of pilot set, the moving range of the latter's workbench only approximates hydraulic cylinder The twice of stroke, is usually used in the rotation of main equipment.Because piston rod 16 diameter at dual-rod hydraulic cylinder two ends is typically equal, Therefore left and right two chamber effective areas are also equal.When respectively two chamber input pressures and during flow identical fluid to the left and right, hydraulic cylinder The thrust of left and right both direction and speed are equal.Single-rod cylinder piston only has one end band piston rod 16, and it also has cylinder body to fix Fix two kinds of forms with piston rod 16.But their movable workbench scope is approximately all the twice of piston effective travel.Single pole liquid Cylinder pressure, due to piston two ends effective area, therefore inputs left and right two when the pressure of oil suction chamber and oil back chamber is respectively P, Pz It is different that the flow in chamber is all the thrust of both direction and speed about during q.Pressurized strut cylinder is built with active piston and limit Position piston, pressurized strut cylinder and limiting piston, active piston and obturage between section equipped with O-ring seal, the left side of pressurized strut cylinder Section links together with obturaging, and the right side of pressurized strut cylinder and tail-hood link together, pressurized strut cylinder, tail-hood, active piston, Pressurized strut is divided into the chamber of three autonomous closure by limiting piston and section of obturaging, three on pressurized strut cylinder nozzle respectively with three The chamber connection of autonomous closure, the piston rod 16 of limiting piston stretches in the piston rod 16 of active piston.Pressurized strut and host work There is direct contact in mechanism, and for different machines and mechanism, pressurized strut has different purposes and job requirement.Therefore, exist It is necessary to performance analysis is carried out to whole hydraulic system before design pressurized strut, then according to requirements select structure type, press Loading condition, movement needs, range etc. determine its groundwork size, carry out intensity, stability and buffering checking computations, finally Carry out structure design again.Because traditional pressurized strut is only used as hydraulicdriven executive component, there is no control function it is impossible to control The output speed of piston rod 16 processed, does not have the requirement stopping in centre position, it is thus impossible to meet use requirement yet.
Content of the invention
It is an object of the invention in place of overcoming the deficiencies in the prior art, providing a kind of structure simple, reliable operation, can control The output speed of pressurized strut piston rod 16 processed is allowed to meet use requirement, meanwhile, pressurized strut piston rod 16 can be made to rest on centre Position, makes it easier to use and safeguard the controlled hydraulic circuit system of folding and unfolding hydraulic actuation cartridge module.
The technical solution adopted for the present invention to solve the technical problems is：A kind of controlled liquid of hydraulic actuator class output speed Pressure circuit system, including：Pack up with extended position pack up with mechanical lock, put down and maintenance position band microswitch 12, stretch out Position microswitch 7, maintenance position microswitch 11, three position four-way electromagnetic valve 1, hydraulic control one-way valve 3, the first flow speed control valve 2, second Flow speed control valve 6 contain the bidirectional hydraulic lock 5 of thermally safe valve and check valve 8 hydraulic actuator it is characterised in that：Three position four-way electromagnetic valve 1 input connects start cartridge module 4 by hydraulic control one-way valve 3, and its output end divides two-way to pass through the first flow speed control valve 2,6 string respectively It is coupled to the bidirectional hydraulic lock 5 positioned at pressurized strut subassembly 4 both sides, the input of bidirectional hydraulic lock 5, output end are parallel with bridging Valve block assembly 26 in two ends；When the hydraulic oil source that hydraulic pump provides is communicated to the right or the left bit of three position four-way electromagnetic valve 1 When putting, hydraulic oil passes through a left side for the hydraulic control one-way valve arrival pressurized strut of the first flow speed control valve 2, the second flow speed control valve 6, bidirectional hydraulic lock 5 Chamber or right chamber, drive pressurized strut piston rod 16 to stretch out or retract；The first flow speed control valve 2 is passed through in oil return, the second flow speed control valve 6 is made to hydraulic pressure The movement velocity of dynamic cartridge module piston rod 16 is controlled.
The present invention has the advantages that compared to prior art.
Structure is simple, reliable operation.The present invention in the case that product overall structure is constant, using three position four-way electromagnetic valve 1 input connects start cartridge module 4 by hydraulic control one-way valve 3, and its output end divides two-way to pass through speed control valves series respectively in position In the bidirectional hydraulic lock 5 on start cartridge module 4 both sides, the input of bidirectional hydraulic lock 5, output end are parallel with and are connected across two ends Valve block assembly 26；By increasing valve block assembly 26 on in-line, make pressurized strut output speed controlled.Meanwhile, work as hydraulic actuation Cylinder piston rod 16 stretches out or retracts and puts in place or during to centre position, three position four-way electromagnetic valve 1 positioned at the centre position of magnetic valve, this When be arranged on one-way piston return in hydraulic lock 5, the fluid of pressurized strut rodless cavity and rod chamber is closed, so that making Dynamic cylinder, in the presence of bidirectional hydraulic lock, hydraulic actuator piston rod 17 is fixed on and stretches out or retract or middle maintenance position, Pressurized strut piston rod 16 can be made to rest on centre position, make it easier to use and safeguard.
The hydraulic actuation cartridge module of the present invention can be packed up for train of mechanism and put down offer power, and piston rod 16 can stop simultaneously Stay Derivative limit on the left or on the right or the centre position of pressurized strut, be easy to mechanism is safeguarded.
Brief description
Fig. 1 is hydraulic actuator class output speed controlled hydraulic circuit system principle schematic of the present invention.
Fig. 2 is start cartridge module front view of the present invention.
Fig. 3 is start cartridge module vertical view cutaway drawing of the present invention.
Fig. 4 is the organigram of Fig. 1 valve block assembly.
In figure：1 three position four-way electromagnetic valve, 2 first flow speed control valves, 3 hydraulic control one-way valves, 4 start cartridge modules, 5 bidirectional hydraulic locks, 6 second flow speed control valves, 7 extended position microswitches, 8 check valves, 9 emergent oil sources, 10 hydraulic pumps, 11 maintenance position microswitches, 12 retracted position microswitches, 13 ears joints, 14 cylinders, 15 valve block assembly mounting seats, 16 piston rods, 17 monaural joints, 18 Pressurized strut oil circuit hole, 19 pipe joints, the built-in retaining ring lock of 20 pressurized struts, 21 valve block housings, 22 oil return ozzles, 23 oil-feed ozzles, 24 Connect pressurized strut ozzle, 25 emergent ozzles, 26 valve block assembly installation bolts.
Further illustrate the present invention with reference to the accompanying drawings and examples, but therefore do not limit the present invention to described reality Apply among a scope.All these designs should be regarded as this technology disclosure of that and protection scope of the present invention.
Specific embodiment
Refering to Fig. 1.In embodiment described below, a kind of hydraulic actuator class output speed controlled hydraulic loop system System, including：Pack up and pack up with mechanical lock, put down and the band microswitch 12 of maintenance position, extended position fine motion with extended position Switch 7, maintenance position microswitch 11, three position four-way electromagnetic valve 1, hydraulic control one-way valve 3, the first flow speed control valve 2, the second flow speed control valve 6, The hydraulic actuator of the bidirectional hydraulic lock 5 containing thermally safe valve and check valve 8 it is characterised in that：Three position four-way electromagnetic valve 1 input Start cartridge module 4 is connected by hydraulic control one-way valve 3, its output end divides two-way to pass through the first flow speed control valve 2, the second flow speed control valve respectively 6 are series at the bidirectional hydraulic lock 5 positioned at pressurized strut subassembly 4 both sides, are parallel with the input of bidirectional hydraulic lock 5, output end It is connected across the valve block assembly at two ends；When the hydraulic oil source that hydraulic pump provides is communicated to the right or the left side of three position four-way electromagnetic valve 1 During position, hydraulic oil passes through the hydraulic control one-way valve arrival pressurized strut of the first flow speed control valve 2, the second flow speed control valve 6, bidirectional hydraulic lock 5 Left chamber or right chamber, drive pressurized strut piston rod 16 to stretch out or retract；Oil return passes through the first flow speed control valve 2, the second flow speed control valve 6 to hydraulic pressure The movement velocity of start cartridge module piston rod 16 is controlled.
Put in place or during to centre position when hydraulic actuator piston rod 16 stretches out or retracts, three position four-way electromagnetic valve 1 is located at The centre position of magnetic valve, is now arranged on the one-way piston return in hydraulic lock 5, by the oil of pressurized strut rodless cavity and rod chamber Liquid is closed so that pressurized strut is in the presence of bidirectional hydraulic lock, hydraulic actuator piston rod 16 is fixed on stretch out or Retract or middle maintenance position.When hydraulic pump or magnetic valve break down, emergent oil sources 9 passes through to connect hydraulic actuator 4 Check valve 8 directly arrives the right chamber of pressurized strut, so that pressurized strut piston rod 16 is retracted；Oil sources 9 of simultaneously meeting an urgent need opens connection hydraulic actuation The hydraulic control one-way valve 3 of cylinder 4 left chambers, makes the left chamber of hydraulic actuator 4 directly connect with the oil return of hydraulic pump 10.
When on machine, hydraulic pump 10 or three position four-way electromagnetic valve 1 etc. break down, it is direct that emergent oil sources 9 passes through check valve 8 To the right chamber of pressurized strut, pressurized strut piston rod 16 is made to retract；Oil sources 9 of simultaneously meeting an urgent need opens hydraulic control one-way valve 3, makes a left side for pressurized strut Chamber is directly connected with the oil return of hydraulic pump 10.
Stretch out chamber when hydraulic oil enters pressurized strut through valve block assembly 26, promote piston rod 16 to move right, built-in retaining ring lock 20 move right simultaneously, and when snap ring moves at outer tube inner surface diameter increase, snap ring opens because of the spring tension of itself, extensive It is multiple that to free uncompressed state, hydraulic oil continues to press on travelling piston and moves to right, and then moves about in piston protuberance insertion snap ring internal diameter, Prevent snap ring to shrink.Meanwhile, steel ball moves in travelling piston left end groove from middle position state, retaining spring return make its two sleeve it Between distance reduce, also promote steel ball to rise in the hole and withstand steel ball and do not fall, to realize locking of extended position simultaneously.This When, extended position microswitch 7 is touched, and on aircraft, traffic light system is to stretch out to put in place.
When unlocking, hydraulic oil enters pressurized strut retraction chamber through valve block to bidirectional hydraulic lock 5, promotes travelling piston to move to left first Release outside snap ring, meanwhile, hydraulic coupling overcome spring force and compression spring so as to steel ball moves down, thus smoothly releasing travelling Piston, then, hydraulic coupling forces snap ring to reduce, and promotes snap ring to enter outer barrel diameter reduction section, to realize retracted position Unlocking.Now, retracted position microswitch 12 is touched, and on aircraft, traffic light system puts in place for retraction.Piston rod 16 is retracted When unlocking, lock mode in contrast.
When maintenance position microswitch 11 is stretched out by pressurized strut piston rod 16 or is retracted into maintenance position, by piston rod 16 When striking gear on assembly toggles it to maintenance position, make traffic light system on aircraft be maintenance position, controlled by magnetic valve Whether system stops in maintenance position.
Refering to Fig. 2-Fig. 3.Whole start cartridge module by 11 maintenance position microswitches 12, retracted position microswitch, double Terminal lug 13, cylinder 14, valve block assembly mounting seat 15, piston rod 16, monaural joint 17, pressurized strut oil circuit hole 18, pipe joint 19, the built-in retaining ring lock of pressurized strut 20 grade parts form, and wherein pass through to carry out machine on ears joint 13 and monaural joint 17 and machine Tool connects, by maintenance position microswitch 11, on retracted position microswitch 12 retraction maintenance position microswitch 11 and machine It is electrically connected.For making whole hydraulic actuator class output speed controlled hydraulic circuit system structure simple, in hydraulic actuation It is reserved with valve block assembly mounting seat 15 on cylinder.
Refering to Fig. 4.In order to make, hydraulic actuator class output speed controlled hydraulic circuit system structure is simple, arrange more adduction Reason, reduce hydraulic pipe, increase reliability, by three position four-way electromagnetic valve 1, flow speed control valve 2, hydraulic control one-way valve 3, start cartridge module 4, Bidirectional hydraulic lock 5 and flow speed control valve 6 are all put together at formation valve block assembly on valve block housing 21, meanwhile, for making valve block assembly Can conveniently be connected with start cartridge module, hydraulic actuator class output speed controlled hydraulic circuit system hydraulic interface is placed on valve block On assembly, and oil return pipe mouth 22, oil-feed ozzle 23, emergent ozzle 25 are connected by airplane Hydraulic Tube, connect pressurized strut ozzle 24 It is attached with pressurized strut pipe joint 19 by conduit, whole valve block assembly is fixed on start by valve block assembly 26 installation bolt Cartridge module valve block assembly mounting seat 15, oil return ozzle 22, oil-feed ozzle 23 connect pressurized strut ozzle 24, emergent ozzle 25, valve block Assembly 26 installation bolt also all concentrates on valve block assembly.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611078550.0A CN106402077B (en) | 2016-11-29 | 2016-11-29 | Hydraulic actuator class output speed controlled hydraulic circuit system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611078550.0A CN106402077B (en) | 2016-11-29 | 2016-11-29 | Hydraulic actuator class output speed controlled hydraulic circuit system |
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| Publication Number | Publication Date |
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| CN106402077A true CN106402077A (en) | 2017-02-15 |
| CN106402077B CN106402077B (en) | 2018-01-09 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143544A (en) * | 2017-07-20 | 2017-09-08 | 江苏创格流体控制有限公司 | A kind of SMD micro hydraulic locking-valve block |
| CN107917809A (en) * | 2017-12-18 | 2018-04-17 | 中国航发贵州黎阳航空动力有限公司 | Fluid Resistance Test fixture before a kind of whole welding type hydraulic actuator weldering |
| CN108247324A (en) * | 2018-02-09 | 2018-07-06 | 丁媛 | A kind of modified Combined machining device |
| CN108274219A (en) * | 2018-02-09 | 2018-07-13 | 丁媛 | A kind of Combined machining device |
| CN108274026A (en) * | 2018-02-06 | 2018-07-13 | 柴玲飞 | A kind of numerically controlled processing equipment |
| CN108296746A (en) * | 2018-02-09 | 2018-07-20 | 丁媛 | A kind of novel compositions processing unit (plant) |
| CN108296649A (en) * | 2018-02-09 | 2018-07-20 | 车传东 | A kind of modified high abrasion composite resin filling material equipment |
| CN108311799A (en) * | 2018-02-09 | 2018-07-24 | 车传东 | A kind of high abrasion composite resin filling material equipment |
| CN108326444A (en) * | 2018-02-09 | 2018-07-27 | 车传东 | A kind of novel high wear-resistant composite resin filling material equipment |
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| US5664417A (en) * | 1996-03-20 | 1997-09-09 | Husco International, Inc. | Control valve for prime mover speed control in hydraulic systems |
| US20040182233A1 (en) * | 2003-03-19 | 2004-09-23 | Kubota Corporation | Hydraulic control apparatus for controlling hydraulic cylinder for implement |
| CN201606331U (en) * | 2010-02-11 | 2010-10-13 | 哈尔滨飞机工业集团有限责任公司 | Landing gear uplock for airplanes |
| CN202628637U (en) * | 2012-07-05 | 2012-12-26 | 中联重科股份有限公司 | Hydraulic control system of pendular oil cylinder with supporting leg, and supporting leg of engineering machinery |
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| CN206290519U (en) * | 2016-11-29 | 2017-06-30 | 四川凌峰航空液压机械有限公司 | Retractable actuating cylinder hydraulic circuit components |
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2016
- 2016-11-29 CN CN201611078550.0A patent/CN106402077B/en active IP Right Grant
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5664417A (en) * | 1996-03-20 | 1997-09-09 | Husco International, Inc. | Control valve for prime mover speed control in hydraulic systems |
| US20040182233A1 (en) * | 2003-03-19 | 2004-09-23 | Kubota Corporation | Hydraulic control apparatus for controlling hydraulic cylinder for implement |
| CN201606331U (en) * | 2010-02-11 | 2010-10-13 | 哈尔滨飞机工业集团有限责任公司 | Landing gear uplock for airplanes |
| CN202628637U (en) * | 2012-07-05 | 2012-12-26 | 中联重科股份有限公司 | Hydraulic control system of pendular oil cylinder with supporting leg, and supporting leg of engineering machinery |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143544A (en) * | 2017-07-20 | 2017-09-08 | 江苏创格流体控制有限公司 | A kind of SMD micro hydraulic locking-valve block |
| CN107917809A (en) * | 2017-12-18 | 2018-04-17 | 中国航发贵州黎阳航空动力有限公司 | Fluid Resistance Test fixture before a kind of whole welding type hydraulic actuator weldering |
| CN108274026A (en) * | 2018-02-06 | 2018-07-13 | 柴玲飞 | A kind of numerically controlled processing equipment |
| CN108247324A (en) * | 2018-02-09 | 2018-07-06 | 丁媛 | A kind of modified Combined machining device |
| CN108274219A (en) * | 2018-02-09 | 2018-07-13 | 丁媛 | A kind of Combined machining device |
| CN108296746A (en) * | 2018-02-09 | 2018-07-20 | 丁媛 | A kind of novel compositions processing unit (plant) |
| CN108296649A (en) * | 2018-02-09 | 2018-07-20 | 车传东 | A kind of modified high abrasion composite resin filling material equipment |
| CN108311799A (en) * | 2018-02-09 | 2018-07-24 | 车传东 | A kind of high abrasion composite resin filling material equipment |
| CN108326444A (en) * | 2018-02-09 | 2018-07-27 | 车传东 | A kind of novel high wear-resistant composite resin filling material equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106402077B (en) | 2018-01-09 |
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