CN107345534B - A kind of no friction service actuator - Google Patents
A kind of no friction service actuator Download PDFInfo
- Publication number
- CN107345534B CN107345534B CN201710728682.1A CN201710728682A CN107345534B CN 107345534 B CN107345534 B CN 107345534B CN 201710728682 A CN201710728682 A CN 201710728682A CN 107345534 B CN107345534 B CN 107345534B
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- CN
- China
- Prior art keywords
- piston
- cylinder
- human body
- rubbery human
- cylinder body
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- 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.)
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- 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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention belongs to hydraulic servo cylinder technical fields, a kind of no friction service actuator, including earrings, end cap, hydraulic fluid port, two rubbery human bodies, two groups of cylinder bolt components, the cylinder body of pyramidal structure, two pistons, postive stop baffle, piston rod, two piston bolt components, two pistons, two semi-rings, two axle sleeves, two check rings are provided.End cap side is equipped with earrings, and the end cap other side is connect with cylinder barrel by welding manner；Rubbery human body I is connect with piston I by piston bolt component I, and rubbery human body I is connect with cylinder body by cylinder bolt component I；Piston rod uses card key connection type with piston I；Rubbery human body II is connect with the piston bolt component II of piston II, and rubbery human body is connect with cylinder body by cylinder bolt component II；Piston rod is with piston II with using card key connection type.Servo actuator provided by the invention is suitable for low pressure thin tail sheep situation, the not effect of frictional force inside servo actuator, and rubbery human body itself plays the role of sealing, without internal leakage.
Description
Technical field
The invention belongs to hydraulic servo cylinder technical field, it is related under a kind of servo actuator more particularly to low pressure condition
A kind of no friction service actuator.
Background technology
Servo actuator is the important executive component of one kind in Hydrauservo System, can implement tension and compression work to load
With.Servo actuator is widely used in aircraft, tank and other hydraulic tests, and the quality of performance directly affects equipment
Overall performance.The frictional force of servo actuator is to influence the principal element of servo-control system control accuracy, and frictional force is mainly sent out
At the sealing of servo actuator, leakage also tend in servo actuator, be rubbed caused by because sealing effect is undesirable for life
There are two aspects in the source for wiping power, on the one hand comes from the friction of outside piston cylinder and servo actuator cylinder body, on the other hand comes
It rubs caused by the sealing of piston rod and guide sleeve, and is often accompanied by internal leakage and external leakage, it is most important
It is that the non-linear control for making Hydrauservo System that servo actuator frictional force generates becomes difficult.
The development of China's servo actuator seriously lags behind west, and most of sealings are sealed using contact and need to arrange in pairs or groups
External sealing element.There are two ways at present for servo actuator frictional force is reduced, the first is mainly in sealing structure
Upper design low friction sealing surfaces or the sealing element using low friction, but the frictional force when piston rod side is bigger to moment of flexure
Influence or it is obvious that be for second to improve the machining accuracy of piston and piston rod or use clearance seal, but cost
Higher, use occasion is fewer, and clearance seal leakage is bigger.
Invention content
The object of the present invention is to provide a kind of friction free servo actuators, solve the outside piston column in servo actuator
The influence problem of the frictional force and piston rod of face and cylinder body and the friction of sealing element for servo system control.It can reduce simultaneously
Leak the environmental pollution brought.By eliminating frictional force, the non-linear for servo-cylinder dynamic response of frictional force can be eliminated
With the influence of control accuracy.It is simple in structure simultaneously, and assembly is easy, without internal leakage, and it is of low cost, process use and maintenance side
Just.In addition, the present invention is suitable under the occasion of low pressure thin tail sheep.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of no friction service actuator include earrings 1, end cap 2, hydraulic fluid port 3, rubbery human body I4, cylinder bolt component I5,
Cylinder body 6, rubbery human body II 7, cylinder bolt component II 8, piston II 9, piston bolt component II 10, postive stop baffle 11, piston rod
12, semi-ring II 13, shaft sleeve II 14, circlip II 15, piston bolt component I16, piston I 17, semi-ring I18, axle sleeve I19, bullet
Property baffle ring I20.
The earrings 1 is fixed on end cap 2, and end cap 2 is connect by welding manner with the left end of cylinder body 6, and cylinder body 6 is same
Hydraulic fluid port 3, A hydraulic fluid ports and B hydraulic fluid port A hydraulic fluid ports and B hydraulic fluid ports are for leading to pressure oil or oil return there are two being opened on side, to realize servo actuator
Bidirectional-movement.
The cylinder body 6 is left, center, right three stage structure.Rubber is placed between 6 one end of middle section cylinder body and left side cylinder body
Leather bag I4 is fastenedly connected between rubbery human body I4 and cylinder body 4 by 6 cylinder bolt component I5, and rubbery human body I4 is tight with cylinder body 6
Contiguity is touched, and external seal is played the role of.Rubbery human body II 7, rubber are placed between 6 other end of middle section cylinder body and right side cylinder body
It being fastenedly connected by 6 cylinder bolt components II 8 between leather bag II 7 and cylinder body 6, rubbery human body II 7 is in close contact with cylinder body 6,
Play the role of external seal；A hydraulic fluid ports are set to left side side of cylinder block, and B hydraulic fluid ports are set to middle section side of cylinder block.
The piston I 17 is fastenedly connected by 6 piston bolt component I16 and rubbery human body I4, and rubbery human body I4 is logical
It crosses piston I17 to be clipped in the middle, be in close contact with piston I 17.The piston II 9 passes through 6 piston bolt components II 10 and rubber
Rubber bladder II 7 is fastenedly connected, and rubbery human body II 7 is clipped in the middle by piston II 9, is in close contact with piston II 9.Hydraulic cylinder can be with
Realization is fully sealed, and without internal leakage and external leakage, and hydraulic cylinder is for inner surface of cylinder block, piston II 9, piston I 17, piston rod
The 12 not requirements of machining accuracy, the not effect of frictional force, may be implemented no friction to servo actuator inside hydraulic cylinder
Control.It is middle section cylinder body 6 between piston I 17 and piston II 9, middle section cylinder body 6 uses pyramidal structure, uses the two
Difference in areas realize piston rod 12 recovery movement.
12 left side of piston rod is connect by semi-ring I18, axle sleeve I19, circlip I20 with card key with piston I 17
Mode connects, and semi-ring I18 is placed in the groove of piston rod 12, and axle sleeve I19 is sleeved on the outside of semi-ring I18, and circlip I20 is stuck in
Axial movement in the groove of piston rod 12 for limiting axle sleeve I19.12 right side of piston rod is passed through by the endoporus of piston II 9
Semi-ring II 13, shaft sleeve II 14, circlip II 15 are connected with card key connection type, and semi-ring II 13 is placed in the groove of piston rod 12
Interior, shaft sleeve II 14 is sleeved on the outside of semi-ring II 13, limits the movement of semi-ring II 13, and circlip II 15 is stuck in the ditch of piston rod 12
Axial movement in slot for limiting shaft sleeve II 14, piston rod 12 are in close contact with rubbery human body II 7, rubbery human body I4, pass through
Squeezing action realizes sealing.Postive stop baffle 11 is arranged in the outside of servo actuator in 12 right end of piston rod, for bidirectionally limited.
The present invention the course of work be：When A mouthfuls of logical pressure oil, at this point, piston rod 12 and piston I 17 drive rubbery human body
I4 is moved right together, while piston rod 12 and piston II 9 drive rubbery human body II 7 to transport to the right together with identical displacement
Dynamic, piston rod 12 stretches out, and fluid is by hydraulic fluid port B oil return boxes, and rubbery human body I4 and rubbery human body II 7 occur elasticity and become under thin tail sheep
Shape is equipped with postive stop baffle 11 and limits the movement of piston rod 12 to prevent II 7 excessive deformation of rubbery human body I4 and rubbery human body.When B oil
When mouthful logical pressure oil, then A hydraulic fluid ports fluid oil return box, at this time under the action of pressure oil, due between piston I 17 and piston II 9
Cylinder body 6 use pyramidal structure, both sides formed difference in areas cause to act on the pressure difference between piston I 17 and piston II 9, make
Piston rod 12 realizes withdrawal action.Piston rod 12 and piston I 17, piston II 9 drive rubbery human body I4, rubbery human body II 7 at this time
It moves downward together, piston rod 12 is retracted.
The invention has the advantages that：Two piston components are used in structure, by piston bolt component by rubber skin
Capsule is connected with piston and is fastened, and for low pressure thin tail sheep servo-cylinder, is not influenced by frictional force, completely eliminates and rub
The nonlinear effect of power is wiped, and rubbery human body is linear under thin tail sheep, is generated with the sealing element using large deformation non-
Linear friction power is compared, and servo-hydraulic control is more easily carried out.
Description of the drawings
Fig. 1 is the overall structure sectional view of no friction service actuator.
In figure：1 earrings；2 end caps；3 hydraulic fluid ports；4 rubbery human body I；5 cylinder bolt component I；6 cylinder bodies；7 rubbery human bodies II；8
Cylinder bolt component II；9 pistons II；10 piston bolt components II；11 postive stop baffles；12 piston rods；13 semi-rings II；14 axle sleeves
Ⅱ；15 circlips II；16 piston bolt component I；17 piston Is；18 semi-ring I；19 axle sleeve I；20 circlip I.
Specific implementation mode
Describe the specific implementation mode of the present invention in detail below in conjunction with technical solution and attached drawing.
A kind of no friction service actuator, cylinder body 6 are left, center, right three stage structure.6 one end of middle section cylinder body and a left side
Rubbery human body I4 is placed between the cylinder body of side, is fastenedly connected by cylinder bolt component I5 between rubbery human body I4 and cylinder body 4, rubber
Leather bag I4 is in close contact with cylinder body 6, plays the role of external seal.It is placed between 6 other end of middle section cylinder body and right side cylinder body
Rubbery human body II 7 is fastenedly connected between rubbery human body II 7 and cylinder body 6 by cylinder bolt component II 8, rubbery human body II 7 and cylinder
Body 6 is in close contact, and plays the role of external seal.Earrings 1 is fixed on end cap 2, and end cap 2 is connect with the left end of left side cylinder body 6, cylinder
It is opened on 6 the same side of body there are two hydraulic fluid port 3, A hydraulic fluid ports and B hydraulic fluid ports, A hydraulic fluid ports are set to left side side of cylinder block, and B hydraulic fluid ports are set to centre
Part side of cylinder block realizes the bidirectional-movement of servo actuator for leading to pressure oil or oil return.Piston I 17 passes through piston bolt
Component I16 is fastenedly connected with rubbery human body I4, and rubbery human body I4 is clipped in the middle by piston I 17, is in close contact with piston I 17.
Piston II 9 is fastenedly connected by piston bolt component II 10 and rubbery human body II 7, during rubbery human body II 7 is clipped in by piston II 9
Between, it is in close contact with piston II 9.12 left side of piston rod is with piston I 17 by semi-ring I18, axle sleeve I19, circlip I20 with card
Key connection mode connects；12 right side of piston rod passes through semi-ring II 13, shaft sleeve II 14, circlip II by the endoporus of piston II 9
15 are connected with card key connection type.Postive stop baffle 11 is arranged in the outside of servo actuator in 12 right end of piston rod, is used for two-way limit
Position.
As shown in Figure 1, part is cleaned with kerosene when assembly hydraulic cylinder, matching surface oiling, each part are not processed after air-drying
Surface removes burr, ensures that assembly surface does not damage when assembly.
The use of servo-cylinder operating pressure is 3MPa, piston rod stroke is ± 2mm, and the working condition of servo-cylinder can pass through
Attached drawing 1 illustrates, when servo valve is in middle position, servo-cylinder A, B hydraulic fluid port is closed, and servo-cylinder is in halted state.In servo
Under the action of valve, lead to when A mouthfuls<When the pressure oil of 3MPa, rodless cavity leads to pressure oil at this time, and the fluid of rod chamber is returned by hydraulic fluid port B
Fuel tank, at this point, piston rod 12 and piston I 17 drive rubbery human body I4 to move right together, while piston rod 12 and piston II 9 with
Identical displacement drives rubbery human body II 7 to move right together, and piston rod 12 stretches out, due to for thin tail sheep, it is possible to recognize
Flexible deformation occurs for it, to prevent II 7 excessive deformation of rubbery human body I4 and rubbery human body, is provided with the limitation of postive stop baffle 11 and lives
12 motion range of stopper rod is between ± 2mm.When servo valve events commutate, servo-cylinder movement commutation, B hydraulic fluid ports are logical at this time<
The pressure oil of 3MPa, A hydraulic fluid port fluid oil return boxes, at this time under the action of pressure oil, due between piston I 17 and piston II 9
Cylinder body 6 uses pyramidal structure, realizes piston rod recovery movement using the difference in areas on both sides, at this time piston rod 12 and piston I 17
It drives rubbery human body I4 to move downward together, and so that piston rod 12 is retracted with piston II 9 and rubbery human body II 7.
This does not use traditional sealing means without friction service actuator in structure, eliminates the non-thread of servo actuator
Adverse effect caused by frottage power.Without the effect of frictional force, the deformation of rubbery human body is linear becomes under thin tail sheep
Shape more easily is implemented to control, under the action of lateral moment of flexure for nonlinear frictional force to Hydrauservo System
It will not cause " stuck " phenomenon of piston or piston rod.Present invention is not limited to the embodiments described above, using structure of the present invention
Think made several modifications and improvements, all belong to the scope of protection of the present invention within.
Claims (3)
1. a kind of no friction service actuator, which is characterized in that the no friction service actuator includes earrings (1), end cap
(2), hydraulic fluid port (3), rubbery human body I (4), cylinder bolt component I (5), cylinder body (6), rubbery human body II (7), cylinder bolt component
II (8), piston II (9), piston bolt component II (10), postive stop baffle (11), piston rod (12), semi-ring II (13), shaft sleeve II
(14), circlip II (15), piston bolt component I (16), piston I (17), semi-ring I (18), axle sleeve I (19), circlip I
(20)；
The cylinder body (6) is left, center, right three stage structure；Rubber skin is placed between middle section cylinder body one end and left side cylinder body
Capsule I (4) is fastenedly connected between rubbery human body I (4) and cylinder body (6) by cylinder bolt component I (5), rubbery human body I (4) and cylinder
Body (6) is in close contact, and plays the role of external seal；Rubbery human body II is placed between the middle section cylinder body other end and right side cylinder body
(7), it is fastenedly connected by cylinder bolt component II (8) between rubbery human body II (7) and cylinder body (6), rubbery human body II (7) and cylinder
Body (6) is in close contact, and plays the role of external seal；
The earrings (1) is fixed on end cap (2), and end cap (2) is connect with the left end of left side cylinder body, on cylinder body (6) the same side
It opens there are two hydraulic fluid port (3), A hydraulic fluid ports and B hydraulic fluid ports, A hydraulic fluid ports are set to left side side of cylinder block, and B hydraulic fluid ports are set to middle section cylinder body
Side；
The piston I (17) is fastenedly connected by piston bolt component I (16) and rubbery human body I (4), and rubbery human body I (4) is worn
It crosses piston I (17) and is clipped among it, be in close contact with piston I (17)；The piston II (9) passes through piston bolt component II
(10) it is fastenedly connected with rubbery human body II (7), rubbery human body II (7) passes through piston II (9) and is clipped among it, with piston II
(9) be in close contact, hydraulic cylinder can realize and be fully sealed, without internal leakage and external leakage, and hydraulic cylinder for inner surface of cylinder block,
The not requirement of machining accuracy of piston II (9), piston I (17), piston rod (12), the not no work of frictional force inside hydraulic cylinder
With no friction control may be implemented to servo actuator；
Piston rod (12) left side is with piston I (17) by semi-ring I (18), axle sleeve I (19), circlip I (20) with card
Key connection mode connects；By the endoporus of piston II (9) on the right side of piston rod (12), pass through semi-ring II (13), axis with piston II (9)
Cover II (14), circlip II (15) is connected with card key connection type；Piston rod (12) right end is set on the outside of servo actuator
Postive stop baffle (11) is set, for bidirectionally limited.
2. a kind of no friction service actuator according to claim 1, which is characterized in that the piston I (17) and work
Filling in the central housing between II (9) uses pyramidal structure, the difference in areas that both sides are formed to cause to act on piston I (17) and piston II
(9) pressure difference between makes piston rod (12) realize withdrawal action.
3. a kind of no friction service actuator according to claim 1 or 2, which is characterized in that the piston rod (12)
It is in close contact with rubbery human body II (7), rubbery human body I (4), is realized and sealed by squeezing action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710728682.1A CN107345534B (en) | 2017-08-25 | 2017-08-25 | A kind of no friction service actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710728682.1A CN107345534B (en) | 2017-08-25 | 2017-08-25 | A kind of no friction service actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107345534A CN107345534A (en) | 2017-11-14 |
| CN107345534B true CN107345534B (en) | 2018-11-06 |
Family
ID=60258073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710728682.1A Expired - Fee Related CN107345534B (en) | 2017-08-25 | 2017-08-25 | A kind of no friction service actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107345534B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2533536A1 (en) * | 1975-07-26 | 1977-02-10 | Kuhnke Gmbh Kg H | Seal for hydraulic actuator - uses soft elastomer cladding on housing interior to seal piston or valve lip |
| CN102022398A (en) * | 2009-09-17 | 2011-04-20 | 刘芳 | Structure of hydraulic pneumatic pressure cylinder |
| CN201810604U (en) * | 2010-07-02 | 2011-04-27 | 西安华科航空液压有限公司 | Integrated servo actuator |
| CN204082758U (en) * | 2014-08-07 | 2015-01-07 | 深圳三思纵横科技股份有限公司 | A kind of hydraulic servo actuator |
| US20160107302A1 (en) * | 2015-12-29 | 2016-04-21 | Caterpillar Inc. | Charging system for hydraulic hammer |
| CN106545529B (en) * | 2016-12-22 | 2018-10-09 | 杭州天恒机械有限公司 | Can adjust automatically oil cylinder internal pressure hydraulic jack dynamical system |
-
2017
- 2017-08-25 CN CN201710728682.1A patent/CN107345534B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN107345534A (en) | 2017-11-14 |
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Granted publication date: 20181106 Termination date: 20210825 |