CN110118211A - A kind of cube oil cylinder and for the sealing ring and sealing structure in the square cylinder - Google Patents
A kind of cube oil cylinder and for the sealing ring and sealing structure in the square cylinder Download PDFInfo
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- CN110118211A CN110118211A CN201910449817.XA CN201910449817A CN110118211A CN 110118211 A CN110118211 A CN 110118211A CN 201910449817 A CN201910449817 A CN 201910449817A CN 110118211 A CN110118211 A CN 110118211A
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- 238000007789 sealing Methods 0.000 title claims abstract description 187
- 239000003921 oil Substances 0.000 claims abstract description 132
- 238000012856 packing Methods 0.000 claims abstract description 66
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 239000000057 synthetic resin Substances 0.000 claims description 9
- 229920003002 synthetic resin Polymers 0.000 claims description 9
- 239000002775 capsule Substances 0.000 claims description 7
- 210000002421 cell wall Anatomy 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000000243 solution Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000012224 working solution Substances 0.000 description 1
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
- 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
- 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
- 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
-
- 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
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Architecture (AREA)
- Actuator (AREA)
Abstract
The present invention provides a kind of cube oil cylinder and for the sealing ring and sealing structure in the square cylinder.The cube oil cylinder sets the cylinder body being square including section, piston, piston rod and the sealing structure being arranged between piston and cylinder body, the sealing structure includes the first sealed bladder circle and the second sealed bladder circle that piston top and the bottom are arranged in, the third sealed bladder circle of cylinder port is set, and ring packing groove is offered in piston outer wall and cylinder body opening correspondence, sealed bladder circle is respectively embedded into corresponding ring packing groove, and it is contacted with the inner wall of groove, each sealed groove inner groove surface is connected to cylinder block, and when hydraulic oil is injected in pressurization, corresponding sealed bladder circle pressure is given to the inner groove surface of sealed groove injection hydraulic oil, it is sealed it by piston and cylinder body.Sealing means of the present invention are reliable, solve uneven easily damaged and cube oil cylinder the sealing problem of sealing element contact pressure, square cylinder can be allow to use in the alternative cylindrical body oil cylinder in specific occasion.
Description
Technical field
The invention belongs to technical field of hydraulic pressure, it is related to hydraulic cylinder, specifically a kind of cube oil cylinder and is used for the rectangular oil
Sealing ring and sealing structure in cylinder.
Background technique
Hydraulic cylinder is to would be enclosed in the hydraulic energy of liquid medium in oil cylinder to be converted to mechanical energy, to apply to pressurant
Loading carries, and is widely used.With the needs of development and the engineering construction of national economy, in the oil cylinder that specific occasion needs to contribute greatly
With cube piston, but hydraulic cylinder is cylindrical body at present, piston rod be also mostly it is round, piston rod, which is converted into cube, to be increased
Large tank size or cushioning steel plate, but friction loss can be generated and object receiving force is uneven.Cube oil cylinder and cube piston can mention
High nominal output avoids the loss of power output, keeps object receiving force uniform.Sealing means, sealing material directly affect oil cylinder performance
Superiority and inferiority.
It is generally sealed using self-sealing between the cylinder body and piston of common cylinder body oil cylinder, point extruding sealing and lip shape are close
Envelope, sealing element are annular shape.Squeezing the pressing force that sealing is hydraulic fluid pressure in pre-compression force and cylinder body by sealing element makes
The contact pressure for increasing with hydraulic fluid pressure in cylinder body and increasing is generated between sealing element and cylinder body inner sidewall, makes sealing ring close
It is merged on cover, sealing is reached with the leakage channel between closed piston and cylinder side wall；Self-sealing lip packing is to utilize
Counter-force caused by sealing ring self-deformation carries out initial sealing, under liquid working media effect, struts sealing ring antelabium, makes
Fitted closely with by sealing surface, contact pressure also increases with the increase of operating pressure, to reach self-tightening.It squeezes close
Sealing element has O-ring seals, square seal ring and X-shaped sealing ring etc., and lip packing has v-ring, U-shaped sealing ring, Y shape close
Circle etc..
By carrying out initial sealing to sealing element pre-compression force and sealing ring self-deformation generated reaction force, it can mostly generate and connect
Touch pressure is uneven and sealing element deformation is uneven, and durability is deteriorated.Because there are corner, sides between cube oil cylinder, cube piston
Extruding sealing is directlyed adopt between body oil cylinder and cube piston or self-sealing lip packing is sealed, it is close because of the presence of corner
Seal initial sealing pressure cannot be such that sealing ring effectively fits closely with sealing surface, and larger, the serious wear that rubs, durability drop
It is low, it is easy to produce hydraulic oil leakage.
Summary of the invention
The present invention is insufficient according to prior art, provides a kind of cube oil cylinder of closed question that can solve cube oil cylinder
And for the sealing ring and sealing structure in the square cylinder, cube oil cylinder is solved by its special sealing ring and sealing structure
Sealing problem, allow cube oil cylinder in the alternative existing cylindrical body oil cylinder in specific occasion, without adding by plunger end
Square plate plate converts load stress, reduces friction loss, keeps object receiving force uniform, and oil cylinder nominal output increases.
In order to solve the above technical problem, the present invention provides technical solution it is as follows: a kind of cube oil cylinder, including cut
The intracorporal rectangular cylinder chamber of cylinder is arranged in, the piston and piston rod that section is square in cylinder body that face is square, the piston side of being placed in
Shape cylinder is intracavitary, and rectangular cylinder chamber is separated into lower oil cylinder chamber and upper oil cylinder chamber, is equipped with pressurization oil nozzle in the lower part of lower oil cylinder chamber, on
The top of oil cylinder chamber is equipped with and moves back pressure oil mouth；The first sealed bladder circle and the second sealed bladder are equipped between piston and rectangular cylinder cavity wall
Circle, and first annular sealed groove is offered respectively in the position of the corresponding first sealed bladder circle of piston outer wall and the second sealed bladder circle
With the second ring packing groove, the first sealed bladder circle and the second sealed bladder circle are respectively embedded into first annular sealed groove and
In second ring sealed groove；Third sealed bladder circle is equipped between outer wall and the cylinder body opening of piston rod, and in cylinder body opening face
Corresponding to offer third ring packing groove, the third sealed bladder circle is embedded in third ring packing groove；Described first is close
Circle encapsulated, the second sealed bladder circle, third sealed bladder circle are hydraulically full or gas annular hollow utricule structure, each sealing
The outer wall of Nang Quan is close to corresponding sealed groove inner wall, and corresponding sealed groove notch is sealed, the first annular sealing
The inside groove of groove, the second ring packing groove and third ring packing groove is connected to rectangular cylinder chamber, and passes through rectangular cylinder chamber
It is set to be close to inboard wall of cylinder block and then shape three sealed bladder circle pressurizations respectively to the inner groove surface injection hydraulic oil of three sealed grooves
At sealing.
The present invention preferably technical solution: the oil cylinder, rectangular cylinder chamber, piston and piston rod section be quadrangle Cheng Yuan
The radian of the rectangular and all arc chord angle of arc is all the same；The first sealed bladder circle, the second sealed bladder circle third sealed bladder
Circle, first annular sealed groove, the second ring packing groove and third ring packing groove shape be the rectangular of rounded corner
The radius of ring body, rounded corner is equal；The first sealed bladder circle and the second sealed bladder circle after being pressurizeed by hydraulic oil its
Inner surface respectively with the cell wall of first annular sealed groove and the second ring packing groove be in close contact, outer surface with rectangular cylinder
The inner wall of chamber is in close contact；For the third sealed bladder circle after being pressurizeed by hydraulic oil, the outer wall of inner surface and piston rod is tight
The cell wall of contiguity touching, outer surface and third ring packing groove is in close contact.
The present invention preferably technical solution: it is provided in the upper and lower surfaces of the first sealed bladder circle and the second sealed bladder circle
First Sealing shield ring is equipped with the second Sealing shield ring in the top of third sealed bladder circle, is equipped with dustband in the cylinder mouth of rectangular cylinder body；
First Sealing shield ring, the second Sealing shield ring and dustband be shape and the identical rounded square of ring packing capsule loop-shaped,
And retaining ring card slot is equipped in the position of corresponding first Sealing shield ring, the second Sealing shield ring and dustband, the first Sealing shield ring, the
Two Sealing shield rings and dustband are embedded in corresponding retaining ring card slot, and upper surface or lower surface are adjacent to corresponding sealed bladder circle；
The cylinder body cylinder mouth is located at the position above third sealed bladder circle equipped with convex block.
The present invention preferably technical solution: the first annular sealed groove is located at upper piston area close to the position of upper oil cylinder chamber
It sets, and is connected to by the first oil-through-hole with upper oil cylinder chamber；The second ring packing groove is located at piston lower portion close to lower oil cylinder
The position of chamber, and be connected to by the second oil-through-hole with lower oil cylinder chamber, first oil-through-hole and the second oil-through-hole are provided with work
Beyond the Great Wall；The third ring packing groove is located at the lower part of cylinder body opening, directly passes through the gap between piston rod and cylinder body
Connection；First, second sealed bladder circle respectively by the first, second oil-through-hole inject after hydraulic oil pressurization to piston and cylinder body into
Row sealing, it is right after the gap of connection third ring packing groove and upper oil cylinder chamber injection hydraulic oil pressurization that third sealed bladder circle passes through
The opening of cylinder body is sealed.
The present invention preferably technical solution: the first sealed bladder circle, the second sealed bladder circle and third sealed bladder circle are adopted
With corrosion resistance, high resiliency, rubber flexible or the integrally-formed annular cystic structures of synthetic resin, and three sealed bladder circles
Tensile strength be equal to or more than 1.2 times of oil cylinder rated oil pressure.
The present invention preferably technical solution: first Sealing shield ring is separately positioned on first annular sealed groove and second
At the notch of ring packing groove, and opened respectively above and below in the notch of first annular sealed groove and the second ring packing groove
Equipped with retaining ring card slot, wherein one end is correspondingly embedded in retaining ring card slot the first Sealing shield ring, the inner wall touching of other end and cylinder body
It connects；Second Sealing shield ring is correspondingly arranged on the piston rod, and when piston rod is moved to cylinder mouth position, the second sealing gear
It encloses in sealing contact with third sealed bladder circle；The dustband is arranged on convex block, and the outer wall of end face and piston rod touches.
A kind of sealing ring in cube oil cylinder provided by the invention, it is characterised in that: the sealing ring is using anti-
Tensile strength is hollow equal to or more than square ring made of 1.2 times of rubber material of oil cylinder rated oil pressure or synthetic resin material
Utricule structure, the outer ring of Nang Quan and inner ring corner are all provided with the arc angle of radians such as being set to, gas or liquid inside sealed bladder circle
Body directly filling or is added after sealing ring molding by pump nozzle on sealing ring or inflating port in sealing ring forming process.
The present invention provides an a kind of sealing structure in cube oil cylinder, it is characterised in that: the sealing structure includes
Upper piston area sealing element, piston lower portion sealing element and seal with annular groove part, the upper piston area sealing element setting are leaned in upper piston area
Piston lower portion is arranged in close to the position of lower oil cylinder chamber in the position of nearly upper oil cylinder chamber, piston lower portion sealing element, and seal with annular groove part is set
It sets in cylinder mouth lower part close to the position of upper oil cylinder chamber；The upper piston area sealing element and piston lower portion sealing element are by ring packing
Nang Quan and the corresponding ring-shaped groove composition for being provided with piston body periphery, seal with annular groove part is opened up by ring packing Nang Quan and correspondence
It is formed in the ring-shaped groove of cylinder mouth inner surface, each sealed bladder circle is to be equal to or more than oil cylinder rated oil pressure using tensile strength
1.2 times of rubber material or synthetic resin material made of inner cavity gassy or liquid circular hollow utricule structure, and
In each ring packing Nang Quan sealing insertion ring-shaped groove；Ring-shaped groove in the upper piston area sealing element and seal with annular groove part
Inner groove surface leads to upper oil cylinder chamber by oil-through-hole or logical oily channel, and the ring-shaped groove inner groove surface in piston lower portion sealing element passes through logical
Oilhole leads to lower oil cylinder chamber, and injects liquid into three ring-shaped grooves by upper and lower oil cylinder chamber respectively after sealing element installation
Pressure oil is sealed the pressurization of sealed bladder circle.
The present invention preferably technical solution: in the upper piston area sealing element, piston lower portion sealing element and seal with annular groove part
Ring packing Nang Quan and ring-shaped groove be quadrangle into the rectangular of circular arc, and the radian of all arc chord angles is all the same.
The present invention preferably technical solution: on the sealed bladder circle of the upper piston area sealing element and piston lower portion sealing element,
Lower surface is provided with the first Sealing shield ring, is equipped with the second Sealing shield ring and dustband above the sealed bladder circle of seal with annular groove part；
And first Sealing shield ring, the second Sealing shield ring and dustband are shape and the identical rounded square of ring packing capsule loop-shaped, and
Retaining ring card slot is equipped in the position of corresponding first Sealing shield ring, the second Sealing shield ring and dustband.
Sealed bladder circle in the present invention is the hollow sealing Nang Quan filled with gas or liquid, is using corrosion resistance, height
The integral structure of rubber or synthetic resin elastic, flexible, hollow sealing capsule circle can do hollow close in gas high pressure storehouse
Envelope, it is ensured that its sealing effect, liquid can be hydraulic oil.Cylinder block, cylinder chamber, piston and piston rod in the present invention
Laying mode is consistent with the existing round laying mode of jack, and cylinder block, cylinder chamber, piston and piston rod are all arranged
Squarely structure, rectangular cylinder chamber is separated into upper and lower two cavitys by piston, and the end of piston rod is equipped with big with piston cross-section
Small identical bellend can directly pass through the seal with annular groove of piston rod seal component and oil cylinder.Sealing shield ring sets in the present invention
It sets as the Sealing shield ring set-up mode of existing circular piston, is shaped to rounded square, the shape with sealed bladder circle
Similar, the sealed bladder circle of cylinder body outlet installs Sealing shield ring, dustband, the setting of Sealing shield ring, dustband close to outlet side
Also as the mounting means of existing round oil cylinder, it is shaped to rounded square similar with the shape of sealed bladder circle.
4 exterior angles of 4 interior angles of cube oil cylinder and cube piston are carried out round corner treatment by the present invention, cube oil cylinder
Four planes of four planes of inner sidewall and cube piston outer wall and 1/4 cylindrical surface are tangent, make cylinder body inner sidewall and piston side shape
At smooth continuous surface, after round corner treatment, filling hydraulic oil or gas in sealed bladder circle make close cube piston
The contact pressure of sealing-in contacting surface each point is equal, and contact pressure when ensure that cylinder efficient on sealing surface is equal and pressure increase
Speed is consistent, and generates contact pressure under the effect of working solution pressure oil in oil cylinder, and contact pressure increases with the increase of oil cylinder working-pressure
Greatly, to reach cylinder seal purpose.In sealed bladder circle embedding sealing groove in the present invention, inner wall and sealed groove it is interior
Groove face is in close contact, and sealed groove inner groove surface is equipped with the hydraulic oil hole for leading to cylinder body, during cylinder efficient, Ke Yitong
It crosses through-hole and injects hydraulic oil to the inner groove surface of sealed groove, give sealed bladder circle one radial pressure, make sealed bladder circle and sealing
The contact of groove and piston, cylinder body medial surface is even closer, increases its sealing effect.
Cube oil cylinder and sealing device of the present invention have it is structurally reasonable, sealing means are reliable, application method and common oil cylinder
Identical, cube oil cylinder is in the alternative cylindrical body oil cylinder in specific occasion, without adding square plate plate to convert lotus by plunger end
Stress is carried, solves uneven easily damaged and cube oil cylinder the sealing problem of sealing element contact pressure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cube oil cylinder of the invention；
Fig. 2 is AA sectional view in Fig. 1；
Fig. 3 is BB sectional view in Fig. 1；
Fig. 4 is the structural schematic diagram of sealed bladder circle in the present invention；
Fig. 5 is the portion C enlarged diagram in Fig. 1；
Fig. 6 is the portion D enlarged diagram in Fig. 1；
Fig. 7 is the portion E enlarged diagram in Fig. 1；
Fig. 8 is that cylinder port seals enlarged diagram in the present invention.
In figure: 1-cylinder body, 1-1-convex block, 2-rectangular cylinder chambers, the lower oil cylinder chamber of 2-1-, 2-2-upper oil cylinder chamber, 3-is living
Plug, 4-piston rods, 5-dustbands, the 6-the first sealed bladder circle, the first annular sealed groove of 6-1-, the first oil-through-hole of 6-2-,
7-the second sealed bladder circle, 7-1-the second ring packing groove, the second oil-through-hole of 7-2-, 8-third sealed bladder circles, 8-1-
Three annular sealed grooves, 9-pressurization oil nozzles, 10-move back pressure oil mouth, 11-retaining ring card slots, the 12-the first Sealing shield ring, and 13-the
Two Sealing shield rings.
Specific embodiment
Below with reference to embodiment and attached drawing, the present invention is further described.Below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the following description, it is to be understood that term " on ", "lower", "inner", "outside", "left", "right" etc.
The orientation or positional relationship of instruction be based on the orientation or positional relationship shown in the drawings or the product using when usually put
Orientation or positional relationship or the orientation or positional relationship that usually understands of those skilled in the art, be merely for convenience of retouching
It states the present invention and simplifies description, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.
A kind of sealing structure for square cylinder provided by the invention, as shown in Fig. 2 to Fig. 8, including upper piston area is close
Sealing, piston lower portion sealing element and seal with annular groove part, the upper piston area sealing element are arranged in upper piston area close to upper oil cylinder chamber
Piston lower portion is arranged in close to the position of lower oil cylinder chamber 2-1 in the position of 2-2, piston lower portion sealing element, and the setting of seal with annular groove part exists
Cylinder mouth lower part is close to the position of upper oil cylinder chamber 2-2；The upper piston area sealing element and piston lower portion sealing element are by ring packing
Nang Quan and the corresponding ring-shaped groove composition for being provided with piston body periphery, seal with annular groove part is opened up by ring packing Nang Quan and correspondence
It is formed in the ring-shaped groove of cylinder mouth inner surface, each sealed bladder circle is to be equal to or more than oil cylinder rated oil pressure using tensile strength
1.2 times of rubber material or synthetic resin material made of inner cavity gassy or liquid circular hollow utricule structure, and
In each ring packing Nang Quan sealing insertion ring-shaped groove；Ring-shaped groove in the upper piston area sealing element and seal with annular groove part
Inner groove surface leads to upper oil cylinder chamber 2-2 by oil-through-hole or logical oily channel, and the ring-shaped groove inner groove surface in piston lower portion sealing element is logical
It crosses oil-through-hole and leads to lower oil cylinder chamber 2-1, and respectively by upper and lower oil cylinder chamber into three ring-shaped grooves after sealing element installation
Injection hydraulic oil is sealed the pressurization of sealed bladder circle.The upper piston area sealing element, piston lower portion sealing element and seal with annular groove
Ring packing Nang Quan and ring-shaped groove in part are quadrangle into the rectangular of circular arc, and the radian of all arc chord angles is all the same.Institute
The sealed bladder circle upper and lower surfaces for stating upper piston area sealing element and piston lower portion sealing element are provided with the first Sealing shield ring 12, cylinder
The second Sealing shield ring 13 and dustband 5 are equipped with above the sealed bladder circle of mouthful seal；And first Sealing shield ring 12, second sealing gear
Circle 13 and dustband 5 are shape rounded square identical with ring packing capsule loop-shaped, and in the first Sealing shield ring 12 of correspondence, the
The position of two Sealing shield rings 13 and dustband 5 is equipped with retaining ring card slot 11.
Used sealed bladder circle is all made of the sealing ring provided by the present invention for square cylinder in implementation, specifically
Using corrosion resistance, high resiliency, rubber flexible or the integrally-formed rectangular annular cystic structures of synthetic resin, and three close
The tensile strength of circle encapsulated is equal to or more than 1.2 times of oil cylinder rated oil pressure, and the outer ring of Nang Quan and inner ring corner are all provided with and are set to
The arc angle of equal radians, gas or liquid inside sealed bladder circle in sealing ring forming process directly filling or sealing ring at
It is added after type by pump nozzle on sealing ring or inflating port, when being provided with pump nozzle or inflating port, pump nozzle or inflating port
Bore be capsule circle cavity cross section diameter 1/5~1/4.Sealed bladder circle can be sealed in gas high pressure storehouse, sealed bladder
In circle when injection liquid, liquid can use corrosion resistant hydraulic oil.
A kind of cube oil cylinder that embodiment provides, as shown in Figure 1 to Figure 3, which includes the cylinder that section is square
The piston 3 and piston rod 4 that body 1, the rectangular cylinder chamber 2 being arranged in cylinder body 1, section are square, the piston 3 are placed in rectangular cylinder chamber
In 2, and rectangular cylinder chamber 2 is separated into lower oil cylinder chamber 2-1 and upper oil cylinder chamber 2-2, is equipped with pressurization oil in the lower part of lower oil cylinder chamber 2-1
Mouth 9, the top of upper oil cylinder chamber 2-2, which is equipped with, moves back pressure oil mouth 10；The present invention is by 4 of 4 interior angles of cube oil cylinder and cube piston
Exterior angle carries out round corner treatment, four planes of four planes of inner sidewall and cube piston outer wall of cube oil cylinder and 1/4 cylindrical surface
Tangent, the section for making oil cylinder 1, rectangular cylinder chamber 2, piston 3 and piston rod 4 is quadrangle into the rectangular of circular arc, and all circular arcs
The radian at angle is all the same, and cylinder body inner sidewall and piston side form smooth continuous surface, and cube piston is by rounded corner
After reason, filling hydraulic oil or gas in sealed bladder circle keep the contact pressure of sealing contact surface each point equal, ensure that oil cylinder work
Contact pressure when making on sealing surface is equal and rate of pressure increase is consistent.
A kind of cube oil cylinder that embodiment provides is set between piston 3 and rectangular 2 inner wall of cylinder chamber as shown in Figure 1 to Figure 3
There are the first sealed bladder circle 6 and the second sealed bladder circle 7, and in the corresponding first sealed bladder circle 6 of 3 outer wall of piston and the second sealed bladder circle 7
Position offer first annular sealed groove 6-1 and the second ring packing groove 7-1,6 He of the first sealed bladder circle respectively
Second sealed bladder circle 7 is respectively embedded into first annular sealed groove 6-1 and the second ring packing groove 7-1；In the outer of piston rod 4
It is equipped with third sealed bladder circle 8 between wall and the opening of cylinder body 1, and offers third ring packing groove in 1 opening face of cylinder body correspondence
8-1, the third sealed bladder circle 8 are embedded in third ring packing groove 8-1；The first sealed bladder circle 6, the second sealed bladder circle
7 third sealed bladder circles 8, first annular sealed groove 6-1, the second ring packing groove 7-1 and third ring packing groove 8-1
Shape is the rectangular ring body of rounded corner, and the radius of rounded corner is equal.
3 top of piston is arranged in close to upper oil cylinder chamber 2-2's in cube oil cylinder in implementation, such as Fig. 1, the first sealed bladder circle 6
Position, the second sealed bladder circle 7 are located at 3 lower part of piston close to the position of lower oil cylinder chamber 2-1, and the third sealed bladder circle 8 is located at cylinder
The lower part of 1 opening of body.As shown in figure 5, first annular sealed groove 6-1 correspondence is provided with 3 top of piston close to upper oil cylinder chamber
The position of 2-2, and be connected to by the first oil-through-hole 6-2 with upper oil cylinder chamber 2-2, the first sealed bladder circle 6 is embedded in first annular sealing
In groove 6-1, outer wall is close to first annular sealed groove 6-1 inner wall, and first annular sealed groove 6-1 notch is sealed,
The first Sealing shield ring 12 is provided in 6 upper and lower surfaces of the first sealed bladder circle.As shown in fig. 6, the second ring packing groove
7-1 correspondence is provided with 3 lower part of piston close to the position of lower oil cylinder chamber 2-1, and passes through the second oil-through-hole 7-2 and lower oil cylinder chamber 2-1
Connection, the second sealed bladder circle 7 are embedded in the second ring packing groove 7-1, and outer wall is close in the second ring packing groove 7-1
Wall, and the second ring packing groove 7-1 notch is sealed, the first sealing gear is provided in 7 upper and lower surfaces of the second sealed bladder circle
Circle 12.The first oil-through-hole 6-2 and the second oil-through-hole 7-2 are provided on piston 3, and the first Sealing shield ring 12 is separately positioned on
At the notch of first annular sealed groove 6-1 and the second ring packing groove 7-1, and in first annular sealed groove 6-1 and
The notch of second ring sealed groove 7-1 offers retaining ring card slot 11 respectively above and below, and wherein one end is corresponding for the first Sealing shield ring 12
It is embedded in retaining ring card slot 11, other end and the inner wall of cylinder body 1 touch.As shown in Figure 7 and Figure 8, the third ring packing ditch
The corresponding lower part for being provided with 1 opening of cylinder body slot 8-1, is directly connected to, in third by the gap between piston rod 4 and cylinder body 1
The second Sealing shield ring 13 is equipped with above sealed bladder circle 8, second Sealing shield ring 13 is correspondingly arranged on piston rod 4, and in work
When stopper rod is moved to cylinder mouth position, the second Sealing shield ring 13 and third sealed bladder circle 8 are in sealing contact.The first sealed bladder circle
6 and second sealed bladder circle 7 by hydraulic oil pressurize after its inner surface respectively with first annular sealed groove 6-1 and second annular
The cell wall of sealed groove 7-1 is in close contact, and outer surface is in close contact with the inner wall of rectangular cylinder chamber 2；The third sealed bladder circle 8
After being pressurizeed by hydraulic oil, the outer wall of inner surface and piston rod 4 is in close contact, outer surface and third ring packing groove 8-
1 cell wall is in close contact.In cylinder efficient, hydraulic oil is injected to the inner groove surface of three sealed grooves by rectangular cylinder chamber 2
It is other so that it is close to 1 inner wall of cylinder body three sealed bladder circle pressurizations and then form sealing.
Cube oil cylinder in implementation, as shown in figure 8, the position that 1 cylinder mouth of the cylinder body is located at 8 top of third sealed bladder circle is set
There is convex block 1-1, and be equipped with dustband 5 on convex block 1-1, the insertion of dustband 5 is provided on convex block 1-1 and 4 interface of piston rod
Groove in, end face and the outer wall of piston rod 4 touch.
The course of work of the invention is identical as the course of work of existing hydraulic cylinder, when specific works, passes through pressurization
Hydraulic oil is injected in the downward oil cylinder chamber 2-1 of oil nozzle 9, gives piston pressure, while passing through the first oil-through-hole 6-2 on piston
Hydraulic oil is injected to the inner groove surface of first annular sealed groove 6-1 and the second ring packing groove 7-1 with the second oil-through-hole 7-2,
It gives the first sealed bladder circle 6 and the second sealed bladder circle 7 one radial pressures, makes the first sealed bladder circle 6 and the second sealed bladder circle 7
Outer wall contacts even closer with corresponding sealed groove, piston and cylinder body, ensure that between upper piston area and lower part and cylinder body
Sealing effect；Meanwhile it being injected by the gap between piston rod 4 and cylinder body to the inner groove surface of third ring packing groove 8-1
Hydraulic oil gives third sealed bladder circle 8 one radial pressures, makes the seal with annular groove of itself and cylinder body 1.
The above, only one of embodiment of the invention, therefore the description thereof is more specific and detailed, but can not be
And it is interpreted as limitation of the scope of the invention.It should be pointed out that for those of ordinary skill in the art, not departing from
Under the premise of present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.Therefore,
Protection scope of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of cube oil cylinder, it is characterised in that: the cube oil cylinder include section be square cylinder body (1), be arranged in cylinder body (1)
The piston (3) and piston rod (4) that interior rectangular cylinder chamber (2), section are square, the piston (3) are placed in rectangular cylinder chamber (2),
And rectangular cylinder chamber (2) is separated into lower oil cylinder chamber (2-1) and upper oil cylinder chamber (2-2), it is equipped with and adds in the lower part of lower oil cylinder chamber (2-1)
Pressure oil mouth (9), the top of upper oil cylinder chamber (2-2), which is equipped with, moves back pressure oil mouth (10)；Between piston (3) and rectangular cylinder chamber (2) inner wall
Equipped with the first sealed bladder circle (6) and the second sealed bladder circle (7), and in the corresponding first sealed bladder circle (6) and second of piston (3) outer wall
The position of sealed bladder circle (7) offers first annular sealed groove (6-1) and the second ring packing groove (7-1) respectively, described
First sealed bladder circle (6) and the second sealed bladder circle (7) are respectively embedded into first annular sealed groove (6-1) and the second ring packing ditch
In slot (7-1)；It is equipped with third sealed bladder circle (8) between outer wall and cylinder body (1) opening of piston rod (4), and is opened in cylinder body (1)
Mouth face is corresponding to offer third ring packing groove (8-1), and the third sealed bladder circle (8) is embedded in third ring packing groove
In (8-1)；The first sealed bladder circle (6), the second sealed bladder circle (7), third sealed bladder circle (8) are hydraulically full or gas
Annular hollow utricule structure, the outer wall of each sealed bladder circle (8) is close to corresponding sealed groove inner wall, and by corresponding sealing
The sealing of groove notch, the first annular sealed groove (6-1), the second ring packing groove (7-1) and third ring packing ditch
The inside groove of slot (8-1) is connected to rectangular cylinder chamber (2), and the inner groove surface injection by rectangular cylinder chamber (2) to three sealed grooves
Hydraulic oil makes it be close to cylinder body (1) inner wall three sealed bladder circle pressurizations and then forms sealing respectively.
2. a kind of cube oil cylinder according to claim 1, it is characterised in that: the oil cylinder (1), rectangular cylinder chamber (2), piston
(3) and the section of piston rod (4) is quadrangle into the rectangular of circular arc, and the radian of all arc chord angles is all the same；Described first
Sealed bladder circle (6), second sealed bladder circle (7) third sealed bladder circle (8), first annular sealed groove (6-1), the second ring packing
The shape of groove (7-1) and third ring packing groove (8-1) is the rectangular ring body of rounded corner, and the radius of rounded corner is homogeneous
Deng；The first sealed bladder circle (6) and the second sealed bladder circle (7) after being pressurizeed by hydraulic oil its inner surface respectively with the first ring
The cell wall of shape sealed groove (6-1) and the second ring packing groove (7-1) be in close contact, outer surface with rectangular cylinder chamber (2)
Inner wall is in close contact；The third sealed bladder circle (8) by hydraulic oil after being pressurizeed, the outer wall of inner surface and piston rod (4)
It is in close contact, the cell wall of outer surface and third ring packing groove (8-1) is in close contact.
3. a kind of cube oil cylinder according to claim 1 or 2, it is characterised in that: close in the first sealed bladder circle (6) and second
The upper and lower surfaces of circle (7) encapsulated are provided with the first Sealing shield ring (12), are equipped with second in the top of third sealed bladder circle (8)
Sealing shield ring (13) is equipped with dustband (5) in the cylinder mouth of rectangular cylinder body (2)；First Sealing shield ring (12), the second sealing gear
It encloses (13) and dustband (5) is shape rounded square identical with ring packing capsule loop-shaped, and in corresponding first Sealing shield ring
(12), the position of the second Sealing shield ring (13) and dustband (5) is equipped with retaining ring card slot (11), the first Sealing shield ring (12),
Two Sealing shield rings (13) and dustband (5) are embedded in corresponding retaining ring card slot (11), and upper surface or lower surface with it is corresponding close
Circle encapsulated is adjacent to；Cylinder body (1) the cylinder mouth is located at the position above third sealed bladder circle (8) equipped with convex block (1-1).
4. a kind of cube oil cylinder according to claim 1 or 2, it is characterised in that: the first annular sealed groove (6-1)
Piston (3) top is located at close to the position of upper oil cylinder chamber (2-2), and even by the first oil-through-hole (6-2) and upper oil cylinder chamber (2-2)
It is logical；The second ring packing groove (7-1) is located at piston (3) lower part close to the position of lower oil cylinder chamber (2-1), and passes through second
Oil-through-hole (7-2) is connected to lower oil cylinder chamber (2-1), and first oil-through-hole (6-2) and the second oil-through-hole (7-2) are provided with work
It fills on (3)；The third ring packing groove (8-1) is located at the lower part of cylinder body (1) opening, directly by piston rod (4) with
Gap connection between cylinder body (1)；First, second sealed bladder circle (6,7) passes through first, second oil-through-hole (6-2,7- respectively
2) piston (3) and cylinder body (1) are sealed after the pressurization of injection hydraulic oil, third sealed bladder circle (8) passes through connection third annular
The opening of cylinder body (1) is sealed after sealed groove (8-1) and the gap injection hydraulic oil pressurization of upper oil cylinder chamber (2-1).
5. a kind of cube oil cylinder according to claim 1 or 2, it is characterised in that: the first sealed bladder circle (6), second
Sealed bladder circle (7) and third sealed bladder circle (8) are all made of corrosion resistance, high resiliency, rubber flexible or synthetic resin integral type
The annular cystic structures of formation, and the tensile strength of three sealed bladder circles is equal to or more than 1.2 times of oil cylinder rated oil pressure.
6. a kind of cube oil cylinder according to claim 3, it is characterised in that: first Sealing shield ring (12) is respectively set
At the notch of first annular sealed groove (6-1) and the second ring packing groove (7-1), and in first annular sealed groove
The notch of (6-1) and the second ring packing groove (7-1) offers retaining ring card slot (11), the first Sealing shield ring respectively above and below
(12) wherein one end is correspondingly embedded in retaining ring card slot (11), and the inner wall of other end and cylinder body (1) touches；The second sealing gear
Circle (13) is correspondingly arranged on piston rod (4), and when piston rod is moved to cylinder mouth position, the second Sealing shield ring (13) and the
Three sealed bladder circles (8) are in sealing contact；The dustband (5) is arranged on convex block (1-1), the outer wall of end face and piston rod (4)
It touches.
7. a kind of sealing ring in cube oil cylinder described in claims 1 or 2, it is characterised in that: the sealed bladder circle
It is rectangular equal to or more than made of 1.2 times of rubber material of oil cylinder rated oil pressure or synthetic resin material using tensile strength
Circular hollow utricule structure, the outer ring of Nang Quan and inner ring corner are all provided with the arc angle of radians such as being set to, inside sealed bladder circle
Gas or liquid directly filling or by the pump nozzle on sealing ring or fill in sealing ring forming process after sealing ring molding
Port is added.
8. a kind of sealing structure in cube oil cylinder described in claim 1 or claim 2, it is characterised in that: institute
Stating sealing structure includes upper piston area sealing element, piston lower portion sealing element and seal with annular groove part, and the upper piston area sealing element is set
It sets in upper piston area close to the position of upper oil cylinder chamber (2-2), piston lower portion sealing element is arranged in piston lower portion close to lower oil cylinder chamber
The position of (2-1), seal with annular groove part are arranged in cylinder mouth lower part close to the position of upper oil cylinder chamber (2-2)；The upper piston area sealing
Part and piston lower portion sealing element are made of ring packing Nang Quan and the corresponding ring-shaped groove for being provided with piston body periphery, and cylinder mouth is close
Sealing is made of ring packing Nang Quan and the corresponding ring-shaped groove for being provided with cylinder mouth inner surface, and each sealed bladder circle is to use
Inner cavity made of 1.2 times of rubber material or synthetic resin material of the tensile strength equal to or more than oil cylinder rated oil pressure is full of gas
The circular hollow utricule structure of body or liquid, and in each ring packing Nang Quan sealing insertion ring-shaped groove；The upper piston area
Ring-shaped groove inner groove surface in sealing element and seal with annular groove part is led to upper oil cylinder chamber (2-2) by oil-through-hole or logical oily channel, living
Ring-shaped groove inner groove surface in plug lower seal leads to lower oil cylinder chamber (2-1) by oil-through-hole, and after sealing element installation
Hydraulic oil is injected into three ring-shaped grooves by upper and lower oil cylinder chamber respectively to be sealed the pressurization of sealed bladder circle.
9. a kind of sealing structure in cube oil cylinder according to claim 8, it is characterised in that: the upper piston area
Ring packing Nang Quan and ring-shaped groove in sealing element, piston lower portion sealing element and seal with annular groove part are side of the quadrangle at circular arc
Shape, and the radian of all arc chord angles is all the same.
10. a kind of sealing structure in cube oil cylinder according to claim 8, it is characterised in that: on the piston
The sealed bladder circle upper and lower surfaces of portion's sealing element and piston lower portion sealing element are provided with the first Sealing shield ring (12), seal with annular groove
The second Sealing shield ring (13) and dustband (5) are equipped with above the sealed bladder circle of part；And first Sealing shield ring (12), the second sealing gear
It encloses (13) and dustband (5) is shape rounded square identical with ring packing capsule loop-shaped, and in corresponding first Sealing shield ring
(12), the position of the second Sealing shield ring (13) and dustband (5) is equipped with retaining ring card slot (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910449817.XA CN110118211B (en) | 2019-05-28 | 2019-05-28 | Square cylinder and sealing ring and sealing structure used in square cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910449817.XA CN110118211B (en) | 2019-05-28 | 2019-05-28 | Square cylinder and sealing ring and sealing structure used in square cylinder |
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| CN110118211A true CN110118211A (en) | 2019-08-13 |
| CN110118211B CN110118211B (en) | 2023-11-28 |
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Cited By (1)
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| CN111608986A (en) * | 2020-06-29 | 2020-09-01 | 马鞍山市卡迈特液压机械制造有限公司 | Cylinder body seal structure in hydraulic breaking hammer |
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| CN110118211B (en) | 2023-11-28 |
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