CN109695716A - Piston and hydraulic cylinder - Google Patents
Piston and hydraulic cylinder Download PDFInfo
- Publication number
- CN109695716A CN109695716A CN201710982682.4A CN201710982682A CN109695716A CN 109695716 A CN109695716 A CN 109695716A CN 201710982682 A CN201710982682 A CN 201710982682A CN 109695716 A CN109695716 A CN 109695716A
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- CN
- China
- Prior art keywords
- groove
- piston
- slide mass
- elastomer
- guide sleeve
- 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.)
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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
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- 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
-
- 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
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- 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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
-
- 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
- F15B15/1471—Guiding means other than in the end cap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/02—Bearing surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluid-Damping Devices (AREA)
- Sealing Devices (AREA)
Abstract
The present invention relates to technical field of hydraulic pressure, disclosing a kind of piston and hydraulic cylinder, the piston includes piston only (41), and the first sealed groove (410) are offered on the periphery of piston only (41)；Piston (40) further includes the first elastomer (411) being set in the first sealed groove (410) and the first slide mass (412) for two way seal, first elastomer (411) is located on the inside of the first slide mass (412), to support the first slide mass (412), a part of the first slide mass (412) protrudes first sealed groove (410).In piston provided by the invention, it is flexibly supported using the first elastomer, first slide mass does friction sealed mode, the force of sliding friction between the first slide mass and inboard wall of cylinder block can be reduced, and under the resilient support of the first elastomer the first slide mass moment can be bonded with inboard wall of cylinder block, leakproofness is improved, and piston operation can be made more stable under the buffer function of the first elastomer.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, more particularly to a kind of piston and hydraulic cylinder.
Background technique
Hydraulic cylinder is common executive component in engineering machinery, and the height of performance directly influences the operation of engineering machinery
Effect, wherein the most common problem of hydraulic cylinder is the problem of shake in telescopic process, especially in the liquid of longer stroke
Cylinder pressure is easiest to that jitter problem occurs during low speed is run.
Inventor is the study found that wherein most important shake component is piston rod, and piston rod is caused to be easy the original shaken
Because being primarily due to the cooperation between piston and cylinder body and the matching problem between piston rod and guide sleeve, in order to guarantee piston
Bar does not generate shake creeping phenomenon, one of common method when low speed extends and retracts movement are as follows: improves adding for cylinder body
Work precision increases fit clearance and reduces the minimum stable speed of service requirement of oil cylinder.The shortcomings that this method are as follows:
1) process equipment precision is increased, processing cost is improved
2) the oil cylinder lost of life
3) the minimum stability of oil cylinder is poor
Summary of the invention
The purpose of the invention is to overcome the problems, such as hydraulic cylinder operation easily shake of the existing technology.
To achieve the goals above, one aspect of the present invention provides a kind of piston, including piston only, which is characterized in that institute
It states and offers the first sealed groove on the periphery of piston only；
The piston further includes the first elastomer being set in first sealed groove and for the of two way seal
One slide mass, first elastomer are located on the inside of first slide mass, and to support first slide mass, described first is sliding
A part of kinetoplast protrudes first sealed groove.
Preferably, first slide mass is formed with edge on the outer circumference surface of part for protruding first sealed groove
Circumferencial direction extend groove.
Preferably, first elastomer uses nitrile rubber material, and first slide mass uses polytetrafluoroethylene (PTFE) material
Material.
Preferably, the second sealed groove, second sealed groove position are also provided on the periphery of the piston only
In first sealed groove side；
The piston further includes the second elastomer being set in second sealed groove and for the of one-way sealing
Two slide masses, second elastomer are located on the inside of second slide mass, and to support second slide mass, described second is sliding
A part of kinetoplast protrudes second sealed groove.
Preferably, second slide mass has the wedge structure of protrusion in the part for protruding second sealed groove,
The inclined-plane of the wedge structure is gradually increased along the direction of first sealed groove to second sealed groove.
Preferably, second elastomer uses nitrile rubber material, and second slide mass uses polytetrafluoroethylene (PTFE) material
Material.
Preferably, two guide ring grooves, first sealed groove are also provided on the periphery of the piston only
And second sealed groove is respectively positioned between two guide ring grooves；
The piston further includes the guide ring being set in each guide ring groove, the guide ring it is a part of convex
The guide ring groove out.
Preferably, the guide ring uses phenolic aldehyde clamping cloth material.
Preferably, two antifouling circular groove slots, two guiding circular grooves are also provided on the periphery of the piston only
Slot is respectively positioned between two antifouling circular groove slots；
The piston further includes the antifouling ring being set in each antifouling circular groove slot, the antifouling ring it is a part of convex
The antifouling circular groove slot out.
Preferably, the antifouling ring uses polytetrafluoroethylene material.
Second aspect of the present invention provides a kind of hydraulic cylinder, comprising: cylinder body, piston rod, guide sleeve and provided by the invention
Piston, the piston are fixedly installed on the end of the piston rod, the piston be mounted slidably in the cylinder body, it is described
Guide sleeve is placed on the piston rod, and is fixedly installed on the open end of the cylinder body.
Preferably, the guide sleeve includes guide sleeve ontology, and the guide sleeve ontology is placed on the piston rod, and solid
Surely it is set to the open end of the cylinder body, offers third sealed groove on the inner headed face of the guide sleeve ontology；
The guide sleeve further includes the third elastomer and third slide mass being embedded in the third sealed groove, and described
Three elastomers are squeezed between third sealed groove bottom and the piston rod, and the third slide mass is squeezed in institute
It states between third elastomer and the piston rod, the third elastomer and the third slide mass are squeezed with the piston rod
Contact.
Preferably, the third elastomer is formed with the first stabilizer blade and the second stabilizer blade, first stabilizer blade and described second
There is accommodating chamber, first stabilizer blade is squeezed in the bottom of the third sealed groove, the second stabilizer blade quilt between stabilizer blade
It is extruded on the piston rod, and there is gap between second stabilizer blade and the side wall of the third sealed groove, so that institute
The hydraulic oil stated between piston rod and the guide sleeve ontology enters the accommodating chamber.
Preferably, there is the first cushion space between first stabilizer blade and the bottom of the third sealed groove, it is described
There is the second cushion space between second stabilizer blade and the piston rod.
Preferably, third elastomer uses nitrile rubber material, and the third slide mass uses polytetrafluoroethylene material.
Preferably, the 4th sealed groove, the 4th sealed groove are also provided on the inner headed face of the guide sleeve ontology
Positioned at third sealed groove side, and distance of the 4th sealed groove apart from the piston seals ditch than the third
The distance of piston described in slot distance is close；
The guide sleeve further includes the 4th elastomer and the 4th slide mass being embedded in the 4th sealed groove, and described
Four elastomers are located at the 4th sealed groove bottom, and the 4th slide mass is squeezed in the 4th elastomer and the work
Between stopper rod.
Preferably, the 4th slide mass has the wedge structure of protrusion, and the inclined-plane of the wedge structure is compressed in institute
It states on piston rod, the inclined-plane of the wedge structure is gradually increased along the direction of the guide sleeve to the piston.
Preferably, the 4th elastomer uses nitrile rubber material, and the 4th slide mass uses polytetrafluoroethylene material.
Preferably, a bearing groove is also provided on the inner headed face of the guide sleeve ontology；The bearing groove slot position is in
Three sealed groove sides, and make the third sealed groove be located at the bearing groove (330) and the 4th sealed groove it
Between；
The guide sleeve further includes the self-lubricating bearing being embedded in the bearing groove, and the self-lubricating bearing is supported in
Between the piston rod and the bearing groove.
Preferably, two bearing grooves are also provided on the inner headed face of the guide sleeve ontology；The third sealed groove
And the 4th sealed groove is respectively positioned between two bearing grooves；
The guide sleeve further includes the self-lubricating bearing being embedded in the bearing groove, and the self-lubricating bearing is supported in
Between the piston rod and the bearing groove.
Preferably, the self-lubricating bearing includes successively arranging along the bearing channel bottom to the piston rod direction
Rigid backing layer, spherical bronze bisque and modified Teflon layer.
Preferably, dust-proof groove is also provided on the inner headed face of the guide sleeve ontology, the dust-proof groove is located at described
The outboard end of guide sleeve ontology；
The guide sleeve further includes the dustband being embedded in the dust-proof groove.
Preferably, elastic spring groove, the elastic spring groove are also provided on the inner headed face of the guide sleeve ontology
Positioned at the end of the bearing groove；
The guide sleeve further includes being embedded in the elastic spring groove for stopping the self-lubricating bearing from described
Elastic spring is skidded off in bearing groove.
It in piston provided by the invention, is flexibly supported using the first elastomer, the first slide mass does friction sealed
Mode can reduce the force of sliding friction between the first slide mass and inboard wall of cylinder block, and can under the resilient support of the first elastomer
It was bonded for the first slide mass moment with inboard wall of cylinder block, improves leakproofness, and can make to live under the buffer function of the first elastomer
Plug operation is more stable.
In hydraulic cylinder provided by the invention, while being sealed using third slide mass, using third elastomer
Resilient support is provided to third slide mass, and hydraulic oil is sealed simultaneously, third elastomer is issued in the impact of hydraulic oil
Raw flexible deformation, makes third elastomer is closer to be extruded on piston rod 20, to improve the leakproofness of hydraulic cylinder；In addition,
The flexible deformation of third elastomer can also make the operation of piston rod more stable, to avoid the shake of piston rod in the process of running
Problem.
Detailed description of the invention
Fig. 1 is the schematic diagram of hydraulic cylinder in an embodiment of the present invention；
Fig. 2 is the partial structural diagram A in Fig. 1 between piston and cylinder body；
Fig. 3 is the partial structural diagram of the first sealed groove, the first elastomer, the first slide mass；
Fig. 4 is the partial structural diagram of the second sealed groove, the second elastomer, the second slide mass；
Fig. 5 is the partial structural diagram B in Fig. 1 between guide sleeve and piston rod；
Fig. 6 is the partial structural diagram of third sealed groove, third elastomer, third slide mass.
Description of symbols
10- cylinder body；
20- piston rod；
30- guide sleeve；31- guide sleeve ontology；310- third sealed groove；311- third elastomer；3111- first
Foot；The second stabilizer blade of 3112-；3113- accommodating chamber；The first cushion space of 3114-；The second cushion space of 3115-；The sliding of 312- third
Body；The 4th sealed groove of 320-；The 4th elastomer of 321-；The 4th slide mass of 322-；330- bearing groove；331- self-lubricating axis
It holds；The dust-proof groove of 340-；341- dustband；350- elastic spring groove；351- elastic spring；
40- piston；41- piston only；The first sealed groove of 410-；The first elastomer of 411-；The first slide mass of 412-；
The second sealed groove of 420- (420)；The second elastomer of 421-；The second slide mass of 422-；430- guide ring groove；431- guiding
Ring；The antifouling circular groove slot of 440-；The antifouling ring of 441-.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Refering to fig. 1, the schematic diagram of hydraulic cylinder in present embodiment is shown；Fig. 2 is in Fig. 1 between piston and cylinder body
Partial structural diagram A, introduce piston provided in this embodiment below according to Fig. 2, the piston 40 includes piston only 41,
The first sealed groove 410 is offered on the periphery of the piston only 41, the piston 40 further includes being set in the first sealing
The first elastomer 411 in groove 410 and the first slide mass 412 for two way seal, first elastomer 411 are located at institute
The inside of the first slide mass 412 is stated, to support first slide mass 412, described in a part protrusion of first slide mass 412
First sealed groove 410.In the application of piston 40, the first slide mass 412 and liquid of 410 part of the first sealed groove are protruded
The fitting of cylinder pressure inboard wall of cylinder block, the hydraulic oil for 40 two sides of sealing piston.
Further, in order to improve sealing effect, and reduce the frictional force between the first slide mass 412 and inboard wall of cylinder block, the
One slide mass 412 can be taken such as flowering structure, and specifically incorporated by reference to Fig. 3, first slide mass 412 is protruding the first sealing ditch
The groove circumferentially extended is formed on the outer circumference surface of the part of slot 410.Groove can accommodate hydraulic oil, and hydraulic oil exists
It on the one hand can enhance sealing effect between first slide mass 412 and cylinder body, on the other hand can play lubricating action, it is sliding to reduce first
Frictional force between kinetoplast 412 and cylinder body, in addition, the contact area reduction of the first slide mass 412 and cylinder body can also reduce friction
Power.Wherein, v-shaped structure as shown in Figure 3 may be selected in groove, also can choose structure similar therewith.
Further, the first elastomer 411 is used to support the first slide mass 412, and the first elastomer 411 has certain bullet
Property, nitrile rubber material can be used, first slide mass 412 uses wear-resisting polytetrafluoroethylene material.In the first elastomer
411 resilient support acts on lower first slide mass 412 and can contact with the inboard wall of cylinder block moment, has both reduced the first slide mass in this way
Pressure between 412 and inboard wall of cylinder block, and improve sealing effect.
Application of the piston in hydraulic cylinder is usually in the unilateral state being pressurized, that is to say, that the hydraulic oil of the side of piston
In high pressure conditions, the hydraulic oil of the other side is low-pressure state.As a result, in order to improve the leakproofness that piston unilateral side is pressurized, in institute
It states and is also provided with the second sealed groove 420 on the periphery of piston only 41, second sealed groove 420 is located at described first
410 side of sealed groove；The piston 40 further includes 421 He of the second elastomer being set in second sealed groove 420
For the second slide mass 422 of one-way sealing, second elastomer 421 is located at 422 inside of the second slide mass, with support
A part of second slide mass 422, second slide mass 422 protrudes second sealed groove 420, answers in piston 40
In, the second slide mass 422 for protruding 420 part of the second sealed groove is bonded with hydraulic cylinder body inner wall, for sealing
The hydraulic oil of 40 side of piston., can be depending on the practical pressured state in piston two sides specifically to which side seal of piston 40, second is sliding
Kinetoplast 422 is sealed mainly for long-time in the hydraulic oil of high pressure conditions side.
Specifically, flowering structure such as, which can be used, in the second slide mass 422 carries out single-side sealing.Refering to Fig. 4, second slide mass
422 have the wedge structure of protrusion in the part for protruding second sealed groove 420, in conjunction with Fig. 2, the wedge structure it is oblique
Face is gradually increased along the direction of first sealed groove 410 to second sealed groove 420.According to Fig. 4, on the left of piston
Hydraulic oil is in high pressure conditions, and the hydraulic oil in left side keeps close under the fitting of the wedge structure and cylinder body of the second slide mass 422
Envelope, at this time, the second sealed groove 420 is located at the left side of the first sealed groove 410.Hydraulic oil on the right side of piston is in high pressure
When state, the second sealed groove 420 is located at the right side of the first sealed groove 410, and wedge structure is symmetrical with Fig. 4.
Similar with the first elastomer 411, the nitrile rubber material with certain elasticity can also be used in the second elastomer 421
Material, the second slide mass 422 can adopt wear-resisting polytetrafluoroethylene material.
In order to provide support and guiding to piston 40, two guide rings are also provided on the periphery of the piston only 41
Groove 430, first sealed groove 410 and second sealed groove 420 be respectively positioned on two guide ring grooves 430 it
Between, the piston 40 further includes the guide ring 431 being set in each guide ring groove 430, and the one of the guide ring 431
Protrude the guide ring groove 430 in part.Guide ring 431 uses high-strength material, such as: phenolic aldehyde clamping cloth.In the application of piston
In, guide ring 431 is supported between piston only 41 and cylinder body, primarily serve support and the effect of guiding, and sealing function compared with
It is small.
Since there are certain purity for hydraulic oil, are inevitably mingled with dirt impurity, if the dirt impurity in these hydraulic oil
Into between piston only 41 and cylinder body, can oversize piston ontology 41 and cylinder body abrasion, and can wear the first elastomer 411,
First slide mass 412, the second elastomer 421 and the second slide mass 422, so as to cause seal leakage.For this purpose, present embodiment
Using following setting, please continue to refer to Fig. 2, two antifouling circular groove slots 440 are also provided on the periphery of the piston only 41,
Two guide ring grooves 430 are respectively positioned between two antifouling circular groove slots 440；The piston 40 further includes being set in often
A part of antifouling ring 441 in a antifouling circular groove slot 440, the antifouling ring 441 protrudes the antifouling circular groove slot 440.
Specifically, the antifouling ring 441 uses polytetrafluoroethylene material, hardness is lower, and main function is the dirt prevented in hydraulic oil
Impurity enters between piston only 41 and cylinder body, so the better position of antifouling ring 441 is close to the position at piston both ends.
In conjunction with the technical solution of above-mentioned piston 40, another aspect of the present invention provides a kind of hydraulic cylinder, please continue to refer to Fig. 1,
The hydraulic cylinder includes: the piston 40 in cylinder body 10, piston rod 20, guide sleeve 30 and above scheme, and the piston 40 is fixed
It is set to the end of the piston rod 20, is usually placed on piston 40 on the step of 20 end of piston rod, spiral shell is then used
Bolt fastening.The inner surface of piston only 41 may also set up sealing element between piston rod 20, stablize shape since the sealing element is in
State (opposite will not be slided), so, only one sealing element can play good sealing function, the sealing element, and O generally can be selected
Shape circle.Further, the piston 40 be mounted slidably in the cylinder body 10, and opposing cylinder 10 inner wall sealing, it is described
Guide sleeve 30 is placed on the piston rod 20, and is fixedly installed on open end (the namely piston rod 20 of the cylinder body 10
Extension end).Guide sleeve 30 mainly plays the guiding role to piston rod 20 and the sealing function to cylinder body 10.Guide sleeve 30 is general
The mode and cylinder body 10 that threaded engagement can be used are tightly connected.
On the basis of above-mentioned 40 technical solution of piston, the hydraulic cylinder is in high-speed cruising or low speed operation without apparent
Creeping phenomenon is shaken, hydraulic cylinder is stable.
Since piston rod 20 can slide in the process of work along the inner wall of guide sleeve 30, and guide sleeve 30 is also to piston rod
20 play the guiding role, so, low friction sealing of the hydraulic cylinder between piston rod 20 and the inner wall of guide sleeve 30 seems especially heavy
It wants.
Incorporated by reference to Fig. 5, the guide sleeve 30 includes guide sleeve ontology 31, and the guide sleeve ontology 31 is placed on the piston
On bar 20, and it is fixedly installed on the open end of the cylinder body 10, it is close to offer third on the inner headed face of the guide sleeve ontology 31
Seal groove 310；
Refering to Fig. 6, the guide sleeve 30 further includes 311 He of third elastomer being embedded in the third sealed groove 310
Third slide mass 312, the third elastomer 311 are squeezed in 310 bottom of third sealed groove and the piston rod 20
Between, the third slide mass 312 is squeezed between the third elastomer 311 and the piston rod 20, the third bullet
Property body 311 and the third slide mass 312 with the piston rod 20 extruding contact.Wherein third elastomer 311 has support
The effect of third slide mass 312, while also there is sealing function, specifically, the preferable fourth of elasticity can be used in third elastomer 311
The preferable polytetrafluoroethylene material of wearability can be used in fine rubber material, third slide mass 312.When high pressure oil impact,
Third elastomer 311 plays certain sealing function first, and and then third slide mass 312 plays sealing function, third elasticity
Certain deformation can occur when sealing for body 311, can play the role of buffering, so that piston rod 20 can be improved
Operation stability.
Please continue to refer to Fig. 6, present embodiment provides a kind of preferable embodiment, specific as follows:
The third elastomer 311 is formed with the first stabilizer blade 3111 and the second stabilizer blade 3112,3111 He of the first stabilizer blade
There is accommodating chamber 3113, first stabilizer blade 3111 is squeezed in the third sealed groove between second stabilizer blade 3112
310 bottom, second stabilizer blade 3112 are squeezed on the piston rod 20, and second stabilizer blade 3112 and the third
There is gap, so that the hydraulic oil between the piston rod 20 and the guide sleeve ontology 31 between the side wall of sealed groove 310
Into the accommodating chamber 3113.After hydraulic oil enters accommodating chamber 3113, can generate, which has the second stabilizer blade 3112, is adjacent to piston
The precompression of bar 20, in this way, the sealing function of the second stabilizer blade 3112 can greatly improve, and the pressure of hydraulic oil is higher, this is pre-
Pressure is higher, so that sealing function is also better.
Further, have the first buffering empty between first stabilizer blade 3111 and the bottom of the third sealed groove 310
Between 3114, between second stabilizer blade 3112 and the piston rod 20 have the second cushion space 3115.First cushion space
3114 for buffering the overall deformation of third elastomer 311, to reduce the friction between third slide mass 312 and piston rod 20
Power；Second cushion space 3115 is used to buffer deformation of second stabilizer blade 3112 when encountering high pressure oil impact, is conducive to second
Foot 3112 is adjacent to piston rod 20.
Further, referring to Fig. 5, being also provided with the 4th sealed groove 320, institute on the inner headed face of the guide sleeve ontology 31
It states the 4th sealed groove 320 and is located at 320 side of third sealed groove, and the 4th sealed groove 320 is apart from the work
Distance of the distance of plug 40 than the third sealed groove 310 apart from the piston 40 is close；That is the 4th sealed groove 320
The left side of third sealed groove 320 in Fig. 5 (close to the side of hydraulic oil).The guide sleeve 30 further includes being embedded described
The 4th elastomer 321 and the 4th slide mass 322 of 4th sealed groove 320, it is close that the 4th elastomer 321 is located at the described 4th
320 bottom of groove is sealed, the 4th slide mass 322 is squeezed between the 4th elastomer 321 and the piston rod 20.The
The knot of the effect of four elastomers 321 and the 4th slide mass 322 and the second elastomer 421 and the second slide mass 422 in piston 40
Structure function is identical.Specifically, the 4th slide mass 322 has the wedge structure of protrusion, the inclined-plane of the wedge structure is squeezed
It is pressed on the piston rod 20, the inclined-plane of the wedge structure gradually increases along the direction of the guide sleeve 30 to the piston 40
It is high.4th slide mass 322 is equally used for one-way sealing, and sealing direction here is very clear, i.e. cylinder interior direction, because only that
With the hydraulic oil of high pressure in cylinder body.Wherein, the 4th elastomer 321 uses nitrile rubber material, and the 4th slide mass 322 is adopted
Use polytetrafluoroethylene material.For the 4th elastomer 321 and the 4th slide mass 322 other function and effect please directly referring to right
The description of second elastomer 421 and the second slide mass 422, so it will not be described here.
In order to play guide support to piston rod 20, a bearing is also provided on the inner headed face of the guide sleeve ontology 31
Groove 330；The bearing groove 330 is located at 320 side of third sealed groove, and the third sealed groove 310 is made to be located at institute
It states between bearing groove 330 and the 4th sealed groove 320, the purpose being arranged in this way is to make bearing groove 330 as far as possible
The distance between piston 40 is widened, to keep guide effect more preferable, is conducive to the stable operation of piston rod 20.
The guide sleeve 30 further includes the self-lubricating bearing 331 being embedded in the bearing groove 330, the self-lubricating axis
331 are held to be supported between the piston rod 20 and the bearing groove 330.
Two bearing grooves 330 can also be opened up on the inner headed face of certain guide sleeve ontology 31；The third sealing
Groove 310 and the 4th sealed groove 320 are respectively positioned between two bearing grooves 330；The guide sleeve 30 further includes
The self-lubricating bearing 331 being embedded in the bearing groove 330, the self-lubricating bearing 331 are supported in 20 He of piston rod
Between the bearing groove 330.Two self-lubricating bearings 331 can play the effect of enhancing supporting role.
In order to make the support strength with higher of self-lubricating bearing 331, the self-lubricating bearing 331 includes along the bearing
Rigid backing layer, spherical bronze bisque and the modified Teflon that 330 bottom of groove is successively arranged to 20 direction of piston rod
Layer.
Further, elastic spring groove 350, the elastic spring are also provided on the inner headed face of the guide sleeve ontology 31
Groove 350 is located at the end of the bearing groove 330；The guide sleeve 30 further includes being embedded in the elastic spring groove 350
For stopping the self-lubricating bearing 331 to skid off elastic spring 351 from the bearing groove 330.Elastic spring 351 is used for
Self-lubricating bearing 331 is stopped to skid off from bearing groove 330.
The dust outside cylinder body enters cylinder body by piston rod 20 in order to prevent, on the inner headed face of the guide sleeve ontology 31
It is also provided with dust-proof groove 340, the dust-proof groove 340 is located at the outboard end of the guide sleeve ontology 31；The guide sleeve
30 further include the dustband 341 being embedded in the dust-proof groove 340.Dustband 341 has the function of dust blowing resistance ash.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited thereto.At this
, can be with various simple variants of the technical solution of the present invention are made in the range of the technology design of invention, including each particular technique
Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various combinations of possible ways
No further explanation will be given.But it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to the present invention
Protection scope.
Claims (23)
1. a kind of piston (40), including piston only (41), which is characterized in that opened up on the periphery of the piston only (41)
There are the first sealed groove (410)；
The piston (40) further includes the first elastomer (411) being set in first sealed groove (410) and is used for double
To the first slide mass (412) of sealing, first elastomer (411) is located on the inside of first slide mass (412), with support
A part of first slide mass (412), first slide mass (412) protrudes first sealed groove (410).
2. piston according to claim 1, which is characterized in that first slide mass (412) is close in protrusion described first
It seals on the outer circumference surface of the part of groove (410) and is formed with the groove circumferentially extended.
3. piston according to claim 1, which is characterized in that first elastomer (411) uses nitrile rubber material,
First slide mass (412) uses polytetrafluoroethylene material.
4. piston according to claim 1, which is characterized in that be also provided on the periphery of the piston only (41)
Two sealed grooves (420), second sealed groove (420) are located at the first sealed groove (410) side；
The piston (40) further includes the second elastomer (421) being set in second sealed groove (420) and is used for single
To the second slide mass (422) of sealing, second elastomer (421) is located on the inside of second slide mass (422), with support
A part of second slide mass (422), second slide mass (422) protrudes second sealed groove (420).
5. piston according to claim 4, which is characterized in that second slide mass (422) is close in protrusion described second
The part for sealing groove (420) has the wedge structure of protrusion, and the inclined-plane of the wedge structure is along first sealed groove (410)
It is gradually increased to the direction of second sealed groove (420).
6. piston according to claim 4, which is characterized in that second elastomer (421) uses nitrile rubber material,
Second slide mass (422) uses polytetrafluoroethylene material.
7. piston according to claim 4, which is characterized in that be also provided with two on the periphery of the piston only (41)
A guide ring groove (430), first sealed groove (410) and second sealed groove (420) are respectively positioned on described in two
Between guide ring groove (430)；
The piston (40) further includes the guide ring (431) being set in each guide ring groove (430), the guide ring
(431) a part protrudes the guide ring groove (430).
8. piston according to claim 7, which is characterized in that the guide ring (430) uses phenolic aldehyde clamping cloth material.
9. piston according to claim 7, which is characterized in that be also provided with two on the periphery of the piston only (41)
A antifouling circular groove slot (440), two guide ring grooves (430) are respectively positioned between two antifouling circular groove slots (440)；
The piston (40) further includes the antifouling ring (441) being set in each antifouling circular groove slot (440), the antifouling ring
(441) a part protrudes the antifouling circular groove slot (440).
10. piston according to claim 9, which is characterized in that the antifouling ring (441) uses polytetrafluoroethylene material.
11. a kind of hydraulic cylinder characterized by comprising cylinder body (10), piston rod (20), guide sleeve (30) and as right is wanted
The described in any item pistons of 1-10 (40) are sought, the piston (40) is fixedly installed on the end of the piston rod (20), the work
Plug (40) is mounted slidably in the cylinder body (10), and the guide sleeve (30) is placed on the piston rod (20), and solid
Surely it is set to the open end of the cylinder body (10).
12. hydraulic cylinder according to claim 11, which is characterized in that the guide sleeve (30) includes guide sleeve ontology
(31), the guide sleeve ontology (31) is placed on the piston rod (20), and is fixedly installed on the opening of the cylinder body (10)
It holds, offers third sealed groove (310) on the inner headed face of the guide sleeve ontology (31)；
The guide sleeve (30) further includes third elastomer (311) and the third cunning being embedded in the third sealed groove (310)
Kinetoplast (312), the third elastomer (311) are squeezed in third sealed groove (310) bottom and the piston rod
(20) between, the third slide mass (312) is squeezed between the third elastomer (311) and the piston rod (20),
The third elastomer (311) and the third slide mass (312), which are squeezed with the piston rod (20), to be contacted.
13. hydraulic cylinder according to claim 12, which is characterized in that the third elastomer (311) is formed with first
Foot (3111) and the second stabilizer blade (3112) have accommodating chamber between first stabilizer blade (3111) and second stabilizer blade (3112)
(3113), first stabilizer blade (3111) is squeezed in the bottom of the third sealed groove (310), second stabilizer blade
(3112) it is squeezed on the piston rod (20), and second stabilizer blade (3112) and the third sealed groove (310)
There is gap, so that the hydraulic oil between the piston rod (20) and the guide sleeve ontology (31) enters the appearance between side wall
It receives chamber (3113).
14. hydraulic cylinder according to claim 13, which is characterized in that first stabilizer blade (3111) and the third seal
There are the first cushion space (3114) between the bottom of groove (310), second stabilizer blade (3112) and the piston rod (20)
Between have the second cushion space (3115).
15. hydraulic cylinder according to claim 12, which is characterized in that third elastomer (311) uses nitrile rubber material,
The third slide mass (312) uses polytetrafluoroethylene material.
16. hydraulic cylinder according to claim 12, which is characterized in that also opened on the inner headed face of the guide sleeve ontology (31)
Equipped with the 4th sealed groove (320), the 4th sealed groove (320) is located at third sealed groove (320) side, and institute
Distance of the 4th sealed groove (320) apart from the piston (40) is stated than the third sealed groove (310) apart from the piston
(40) distance is close；
The guide sleeve (30) further includes being embedded to slide in the 4th elastomer (321) of the 4th sealed groove (320) and the 4th
Kinetoplast (322), the 4th elastomer (321) are located at the 4th sealed groove (320) bottom, the 4th slide mass
(322) it is squeezed between the 4th elastomer (321) and the piston rod (20).
17. hydraulic cylinder according to claim 16, which is characterized in that the 4th slide mass (322) has the wedge of protrusion
Shape structure, the inclined-plane of the wedge structure are compressed on the piston rod (20), and the inclined-plane of the wedge structure is led described in
The direction of to set (30) to the piston (40) gradually increases.
18. hydraulic cylinder according to claim 16, which is characterized in that the 4th elastomer (321) uses nitrile rubber material,
4th slide mass (322) uses polytetrafluoroethylene material.
19. hydraulic cylinder according to claim 16, which is characterized in that also opened on the inner headed face of the guide sleeve ontology (31)
Equipped with a bearing groove (330)；The bearing groove (330) is located at third sealed groove (320) side, and keeps the third close
Groove (310) are sealed between the bearing groove (330) and the 4th sealed groove (320)；
The guide sleeve (30) further includes the self-lubricating bearing (331) being embedded in the bearing groove (330), the self-lubricating
Bearing (331) is supported between the piston rod (20) and the bearing groove (330).
20. hydraulic cylinder according to claim 16, which is characterized in that also opened on the inner headed face of the guide sleeve ontology (31)
If there are two bearing groove (330)；The third sealed groove (310) and the 4th sealed groove (320) are respectively positioned on two
Between the bearing groove (330)；
The guide sleeve (30) further includes the self-lubricating bearing (331) being embedded in the bearing groove (330), the self-lubricating
Bearing (331) is supported between the piston rod (20) and the bearing groove (330).
21. hydraulic cylinder described in 9 or 20 according to claim 1, which is characterized in that the self-lubricating bearing (331) includes along institute
State the rigid backing layer successively arranged to the piston rod (20) direction bearing groove (330) bottom, spherical bronze bisque and modification
Polytetrafluoroethylene ethylene layer.
22. hydraulic cylinder described in 9 or 20 according to claim 1, which is characterized in that on the inner headed face of the guide sleeve ontology (31)
It is also provided with dust-proof groove (340), the dust-proof groove (340) is located at the outboard end of the guide sleeve ontology (31)；
The guide sleeve (30) further includes the dustband (341) being embedded in the dust-proof groove (340).
23. hydraulic cylinder described in 9 or 20 according to claim 1, which is characterized in that on the inner headed face of the guide sleeve ontology (31)
It is also provided with elastic spring groove (350), the elastic spring groove (350) is located at the end of the bearing groove (330)；
The guide sleeve (30) further includes being embedded in the elastic spring groove (350) for stopping the self-lubricating bearing
(331) elastic spring (351) are skidded off from the bearing groove (330).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710982682.4A CN109695716A (en) | 2017-10-20 | 2017-10-20 | Piston and hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710982682.4A CN109695716A (en) | 2017-10-20 | 2017-10-20 | Piston and hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109695716A true CN109695716A (en) | 2019-04-30 |
Family
ID=66225220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710982682.4A Pending CN109695716A (en) | 2017-10-20 | 2017-10-20 | Piston and hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109695716A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555226A (en) * | 2020-12-29 | 2021-03-26 | 徐州金鼎恒立液压件有限公司 | Low-friction sealing device for piston rod shaft of hydraulic cylinder |
| CN113216096A (en) * | 2021-05-06 | 2021-08-06 | 中国葛洲坝集团第一工程有限公司 | Jacking-free gate bottom pivot sealing element and in-situ maintenance method |
| CN118026026A (en) * | 2024-04-12 | 2024-05-14 | 山西泰宝科技有限公司 | Hydraulic support aqueous medium pushing jack sealing device |
| CN118026026B (en) * | 2024-04-12 | 2024-06-21 | 山西泰宝科技有限公司 | Hydraulic support aqueous medium pushing jack sealing device |
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| CN1965185A (en) * | 2004-06-07 | 2007-05-16 | Nok株式会社 | Sealing system |
| CN201396164Y (en) * | 2008-09-08 | 2010-02-03 | 咸阳科隆特种橡胶制品研究所 | Coal mine hydraulic support reciprocating dynamic sealing assembly structure |
| CN203584960U (en) * | 2013-11-20 | 2014-05-07 | 徐州徐工液压件有限公司 | Hydraulic cylinder piston combined type sealing structure |
| CN205260486U (en) * | 2015-11-09 | 2016-05-25 | 无锡市长江液压缸厂 | A wear -resisting piston rod subassembly for pneumatic cylinder |
| CN206111731U (en) * | 2016-10-14 | 2017-04-19 | 龙工(福建)液压有限公司 | Pneumatic cylinder is received and is defiled ring |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1965185A (en) * | 2004-06-07 | 2007-05-16 | Nok株式会社 | Sealing system |
| CN201396164Y (en) * | 2008-09-08 | 2010-02-03 | 咸阳科隆特种橡胶制品研究所 | Coal mine hydraulic support reciprocating dynamic sealing assembly structure |
| CN203584960U (en) * | 2013-11-20 | 2014-05-07 | 徐州徐工液压件有限公司 | Hydraulic cylinder piston combined type sealing structure |
| CN205260486U (en) * | 2015-11-09 | 2016-05-25 | 无锡市长江液压缸厂 | A wear -resisting piston rod subassembly for pneumatic cylinder |
| CN206111731U (en) * | 2016-10-14 | 2017-04-19 | 龙工(福建)液压有限公司 | Pneumatic cylinder is received and is defiled ring |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555226A (en) * | 2020-12-29 | 2021-03-26 | 徐州金鼎恒立液压件有限公司 | Low-friction sealing device for piston rod shaft of hydraulic cylinder |
| CN112555226B (en) * | 2020-12-29 | 2023-12-22 | 徐州金鼎恒立液压件有限公司 | Low-friction sealing device for hydraulic cylinder piston rod shaft |
| CN113216096A (en) * | 2021-05-06 | 2021-08-06 | 中国葛洲坝集团第一工程有限公司 | Jacking-free gate bottom pivot sealing element and in-situ maintenance method |
| CN118026026A (en) * | 2024-04-12 | 2024-05-14 | 山西泰宝科技有限公司 | Hydraulic support aqueous medium pushing jack sealing device |
| CN118026026B (en) * | 2024-04-12 | 2024-06-21 | 山西泰宝科技有限公司 | Hydraulic support aqueous medium pushing jack sealing device |
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Application publication date: 20190430 |