CN110307192A

CN110307192A - Pressurize oil cylinder

Info

Publication number: CN110307192A
Application number: CN201910703191.0A
Authority: CN
Inventors: 吴仁武; 张�杰
Original assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Current assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2019-10-08

Abstract

The present invention provides a kind of pressurization oil cylinders, comprising: cylinder barrel the piston rod of reciprocating movement and is set in piston rod and with the piston of piston rod reciprocating movement in cylinder barrel in cylinder barrel, and the two sides of piston are the first chamber and second chamber of opposing seal.Wherein, at least one oil passage is provided on piston, oil passage is connected to first chamber and second chamber, and decompressor is provided in any oil passage, and decompressor is used to control the on-off of oil passage.The pressure intercommunication that pressurization oil cylinder provided by the invention realizes piston both ends by the way that oil passage is arranged in cylinder barrel; at one end when pressure abruptly increase; pressure can be discharged into the other end; to reduce the compression shock to cylinder body; by the decompressor being arranged in oil passage, to control the on-off of oil passage, accomplish the pressure of automatic release cylinder cylinder pressure abruptly increase one end in time; to provide rapid effective protection to oil cylinder, to play the effect for extending pressurization oil cylinder service life.

Description

Pressurize oil cylinder

Technical field

The present invention relates to engineering machinery fields, in particular to a kind of pressurization oil cylinder.

Background technique

Currently, pressurization oil cylinder is at work, very big shaking or vibration are inevitably generated, shakes or effect of vibration exists On oil cylinder, different degrees of destruction, such as cylinder barrel deformation, piston rods bend etc. can be caused to oil cylinder, thus influence making for oil cylinder Use the service life.In the prior art, the stabilization of oil cylinder is kept, usually using external fixed mode to reduce vibration to the shadow of oil cylinder It rings；Either the pressure of part is exported by peripheral hardware decompressor, so that local pressure reduces, to reach the mesh of protection cylinder barrel 's.But both above modes, have the following deficiencies:

Oil cylinder pressurize at work, in-oil cylinder hydraulic oil can generate violent surge to pressurization oil to cylinder interior Cylinder damages.Since slosh frequency is usually high-frequency, surge is most of all to be formed inside oil cylinder interior in short-term, In this way, surge has just stopped when being often not up to outside oil cylinder, fixing piece or decompression outside pressurization oil cylinder Device can not accomplish the pressure inside release oil cylinder in time, and the impact force inside oil cylinder still can cause certain journey to oil cylinder The destruction of degree.Thus, the protection provided at work pressurization oil cylinder is limited, and can not significantly improve the work of pressurization oil cylinder Stability and the service life for extending pressurization oil cylinder.

Summary of the invention

At least one in order to solve the above-mentioned technical problem, it is an object of the present invention to provide a kind of pressurization oil cylinders.

To achieve the above object, the embodiment of first aspect present invention provides a kind of pressurization oil cylinder, comprising: cylinder barrel, packet The cylinder bottom for including cylinder body and being connected with cylinder body；Piston rod, including first end and the second end, the second end are inserted into institute It states in cylinder barrel, along the cylinder barrel reciprocating movement；Piston is located in the cylinder barrel, and is set on the second end, with institute State the second end reciprocating movement in the cylinder barrel；Wherein, the cylinder bottom, the second end, the cylinder body and the piston It is enclosed towards one end of the cylinder bottom and sets out first chamber, the piston rod, the cylinder body and the piston are away from the cylinder bottom One end, which is enclosed, sets out second chamber, at least one decompressor, the decompressor connection described first are provided in the piston Chamber and the second chamber, for controlling the on-off between the first chamber and the second chamber.

Specifically, pressurization oil cylinder is at work, piston rod moves back and forth in cylinder barrel, and upper cover of piston rod is equipped with piston, The piston is set on the first end of piston rod, and piston plays the role of sealing, and both ends are the first chambers of opposing seal And second chamber.When piston rod to cylinder bottom direction when moving, piston is equally moved to cylinder bottom direction, compresses the sky of first chamber Between, since first chamber is relatively closed space, the indoor pressure of chamber can become larger, while the hydraulic oil in first chamber can be Under the promotion of piston, impact is generated to the cylinder bottom and cylinder body that are located at first chamber one end, the pressure for impacting generation is reaching certain It can make cylinder barrel expanding distortion when degree, and then to destruction cylinder barrel.The present invention compared to the prior art, by the way that decompressor is arranged On piston, to control the connection between first chamber and the second chamber, one in first chamber and second chamber When pressure is excessive, pressure can quickly be discharged, for example reach certain journey when the pressure in first chamber is greater than second chamber When spending, the hydraulic oil in first chamber can flow to second chamber under the action of pressure difference, and then alleviate the pressure in first chamber Power.Likewise, although hydraulic oil in first chamber also generates impact to the cylinder bottom and cylinder body that are located at first chamber one end, by It is no longer sealing structure in first chamber, generated surge can also run through decompressor and be discharged into the second chamber First chamber one end can be effectively reduced in this way by letting out the big chamber of pressure indoor pressure in the small chamber of pressure in room Cylinder barrel be hit pressure a possibility that being destroyed, to achieve the purpose that protection pressurization oil cylinder.It is located at relative to by decompressor Outside cylinder barrel or for non-live technical solution beyond the Great Wall, the decompressor is arranged on piston, decompressor pair can be made The abrupt change of pressure accomplishes to react in time, discharges before compression shock cylinder tube and presses in first chamber or second chamber in time Pressure in the high side of power, to oil cylinder offer be effectively protected rapidly, to play the service life for extending pressurization oil cylinder Effect.

The on-off between first chamber and the second chamber is controlled by the unlatching and closure of decompressor, i.e., is not It is normally opened or normally closed.The big Mr. Yu of pressure difference during piston rod reciprocating movement, between first chamber and second chamber When one preset range, the decompressor is opened, and the connection movement between first chamber and the second chamber is completed, so that pressure The indoor pressure of the big chamber of power is let out in the small chamber of pressure；And when the pressure difference between first chamber and the second chamber is small When the unlocking condition of decompressor, decompressor closure, first chamber and second chamber are in partition state, phase between the two To sealing not intercommunication pressure, in this state, even it will be understood by those in the art that in first chamber or in second chamber There are certain pressure, cylinder barrel can be born completely, thus will not generate destruction to pressurization oil cylinder.

The decompressor helps to alleviate the internal pressure of the pressurization oil cylinder, the pressure balance of Shi Liang side cavity, into And when being provided with multiple decompressors on piston, alleviating the process released stress can more quickly complete, more preferable to play Protective effect, avoid the surge of higher frequency to pressurization oil cylinder destruction.In addition, due to first chamber or second chamber Interior pressure can alleviate release by rapid, to reduce the indoor pressure of chamber to the percussion of cylinder barrel, and then can phase The design requirement for cylinder barrel thickness should be reduced, to achieve the effect that save cost.

In addition, the pressurization oil cylinder in above-mentioned technical proposal provided by the invention can also have following additional technical feature:

In the above-mentioned technical solutions, the decompressor includes balance pressure reducing valve, and the input end of the balance pressure reducing valve connects Lead to one in the first chamber and the second chamber, the outlet end of the balance pressure reducing valve be connected to the first chamber and Another in the second chamber；Or the decompressor includes oil passage and spool chamber, the both ends of the oil passage It is respectively communicated with the first chamber and the second chamber, the part spool chamber is connected with the oil passage, the valve Movable valve hole part is provided in core cavity, the valve hole part passes through described excessively oily in spool intracavity round trip sliding control The on-off in channel, to control the on-off between the first chamber and the second chamber.

The decompressor can be balance pressure reducing valve, be also possible to be mounted on the portion in the piston with decompression Part, certain decompressor can also be integrally formed with the piston.

It include the scheme of balance pressure reducing valve for the decompressor, piston both ends may be implemented in the balance pressure reducing valve Pressure at one end when pressure abruptly increase, can be discharged into the other end by pressure intercommunication, to reduce the compression shock to cylinder body, be led to The decompressor being arranged in oil passage is crossed, to control the on-off of oil passage, accomplishes automatic release cylinder barrel internal pressure in time The pressure of power abruptly increase one end, so that rapid effective protection is provided to oil cylinder, to play the effect for extending pressurization oil cylinder service life. Since balance pressure reducing valve is relatively common, as long as issuing corresponding channel on piston, then pressure reducing valve is installed in channel, Structure is simple, easy for installation.In addition for the form of piston, also there is no limit, for example piston can be a complete entirety, Or piston is also possible to opposite opened, after the groove for corresponding to the balance pressure reducing valve is opened up out on piston, by balance decompression Valve, which is put into that opposite opened piston split is sealed again, completes installation.In this way, the peace of balance pressure reducing valve can be further simplified Dress process.

It include the technical solution of oil passage and spool chamber for the decompressor, relative to complete pressure reducing valve Speech, setting has the component of decompression in piston, advantageously reduces cost, and structure is simple, while being conducive to further The size of optimization piston.In the present solution, oil passage is connected to the oil passage of the first chamber and the second chamber, portion The spool chamber is divided to be connected with the oil passage, in unidirectional pressure leak process, hydraulic oil, the side high from pressure flows to pressure The low side of power both also went through part spool chamber by the oil passage, it is seen that the first chamber and second chamber It is to be connected to by the oil passage with the part spool chamber between room.Movable spool portion is provided in spool chamber simultaneously Part, valve hole part can be movable in spool chamber, when sliding into the oil passage, can block the oil passage, It plays the effect of the first chamber and second chamber partition.By the way that spool chamber and valve hole part is arranged by chamber and institute Second chamber partition is stated, better seal effect can be played, while providing installation space to valve hole part, makes installation more It is convenient, more flexible action space also is provided to valve hole part, the big of oil passage flow section is controlled by valve hole part It is small, the velocity of liquid assets of hydraulic oil can also be further controlled, the on-off effect of valve hole part can be more promoted, to meet The demand of different operating conditions.

On the other hand, oil passage and spool chamber can have different combinations in piston, so that oil passage Generate more smooth turn-on effect.Such as the company of opening direction of the oil passage on piston, oil passage and spool chamber Logical position, oil passage and geomery of spool chamber etc..As that the valve hole part in spool chamber can be made to play described in control The effect of oil passage, so that it is able to achieve the purpose of the present invention, and without being detached from design philosophy and objective of the invention, because And should all be within the scope of the present invention, this is no longer going to repeat them.It is understood that the diameter of spool chamber can be excessively oily The diameter in channel, so that the diameter of valve hole part is greater than the diameter of oil passage, the area of section that such valve hole part blocks can More greatly, to play better seal effect, further improve the reliability of valve hole part, in the feelings that the oil passage disconnects Under condition, intercommunication pressure between the first chamber and the second chamber is prevented, leads to that pressurization cylinder thrust deficiency occurs Or the case where operating rate decline, to influence the working efficiency of hydraulic cylinder.

In the above-mentioned technical solutions, oil passage and spool chamber, the spool are included the case where for the decompressor Component includes cock body and the elastic component that matches with the cock body, and the spool chamber includes avoiding space, and the cock body is described It is moved back and forth in spool chamber, wherein the cock body enters the avoiding space under the action of oil pressure and compresses the elastic component The first chamber and the second chamber is connected, and the evacuation sky is left under the effect of the reseting elasticity of the elastic component Between to separate the first chamber and the second chamber.

In the present solution, when the first chamber and the one of internal pressure of the second chamber are greater than inside another Pressure when, the oil passage both ends formed pressure difference, hydraulic oil is under the action of pressure difference, the side big from pressure The side flowing that pressure is small into the oil passage, the piston is pushed open, so that the cock body is left blocking described excessively oily The position in channel makes the pressure balance at oil passage both ends to make to be connected between the first chamber and the second chamber, Pressure difference reduces；The cock body squeezes the elastic component, and the elastic component generates tension, when the tension force of spring is greater than pressure When poor, the elastic component restores to the original state, and pushes the cock body to blocking the position of the oil passage to slide, to make described the It is isolated between one chamber and the second chamber.

Specifically, the elastic component can be spring, by the way that the coefficient of elasticity of spring is arranged, the work of pressure can control With range, when the pressure difference at oil passage both ends is less than the predetermined value of spring-compressed, spring is not deformed, first chamber and It is not turned between second chamber, without pressure release.Cock body under normal conditions, is blocked in the excessively oily space being arranged in spool chamber In oil passage, so that oil passage is in an off state, first chamber and second chamber are mutually isolated.When first chamber When room and the one of internal pressure of the second chamber are greater than the pressure of another inside, such as when the pressure in first chamber When power is greater than the pressure in second chamber, the pressure difference at oil passage both ends, it will act on cock body, then squeezed by cock body Spring, when the pressure for giving cock body is greater than the predetermined value of spring-compressed, spring is compressed, and then the cock body is made to enter evacuation In space, cock body is also removed in oil passage, the state for being on the oil passage.After oil passage conducting, first Start pressure release movement between chamber and second chamber, the intracorporal pressure of the two chambers is made to tend to balance, pressure difference reduces, and works as pressure When difference drops below the predetermined value of spring-compressed, spring is insufficient to allow to generate compressive deformation, spring restores to the original state, and passes through spring Tension force effect by cock body by being released in avoiding space, return in oil passage to separate the first chamber and second chamber Pressure leak process is completed in room.

By the elastic component for setting valve hole part to cock body and matching with cock body, oil passage conducting and closure are realized Switching between two states, structure is simple and easy for installation, advantageously reduces cost, while further reduced operation difficulty, Be conducive to simplified control program.Certainly, elastic component can also be with reed, and deformation after bellows etc. is force-applied restores former after not stressing The component of shape.It is understood that elastic component is located in the avoiding space, can have to avoid the interference for excessively oily space Conducive to the stability for improving valve hole part.

In the present solution, valve hole part can also include stop part, the stop part is arranged in the avoiding space of spool chamber One end far from the cock body, for preventing the elastic component to be detached from the spool chamber.It can make bullet by the way that stop part is arranged Spring is not easily disconnected from original predetermined position in stress, further increases the job stability of valve hole part.In addition, the stop part It can be hollow screw plug and be also possible to blind plugging, when for blind plugging, the sealing performance of valve hole part can be improved, and then further mention The high reliability of valve hole part.In the case where the oil passage disconnects, first chamber and second chamber road are prevented Between intercommunication pressure, cause there is a situation where pressurization cylinder thrust is insufficient or operating rate decline, to influence hydraulic cylinder Working efficiency.

In the present solution, the annular recess coaxial with the spool chamber is also provided on the cock body, the annular recess It is inside provided with cock body sealing ring, the outside of the cock body sealing ring and spool chamber sealing cooperate.It is sealed by setting cock body Circle can be further improved the sealing performance of valve hole part, to further increase the use reliability of valve hole part.In addition, logical It crosses and is provided with annular recess, the position-limiting action to cock body sealing ring can be played, make the easier for installation of cock body sealing ring, together When during cock body moves back and forth between excessively oily space in avoiding space, the displacement or de- of cock body sealing ring can be prevented It falls, further increases the use reliability of valve hole part.

In the above-mentioned technical solutions, the quantity of the decompressor is two, the import of one of them decompressor End connects the first chamber, and outlet end connects the second chamber, described in the input end connection of another decompressor Second chamber, outlet end connects the first chamber, so that each decompressor is able to carry out unidirectional pressure release, described in two Decompressor is able to carry out double-direction relief.

The quantity of the decompressor is two, two decompressor reversed arrangements.

Balance pressure reducing valve is included the case where for the decompressor, the input end of one of them balance pressure reducing valve connects Lead to the first chamber, outlet end is connected to the second chamber；The input end of balance pressure reducing valve described in another one is connected to institute Second chamber is stated, outlet end is connected to the first chamber.

Oil passage and spool chamber included the case where for the decompressor, in one of oil passage and spool chamber Valve hole part is for controlling one-way conduction or the disconnection for being directed toward the second chamber by the first chamber；Another oil passage It is used to control one-way conduction or the disconnection of being directed toward the first chamber by the second chamber with spool chamber internal valve core components.

When being only provided with a decompressor, the decompressor can be one-way conduction and be also possible to bidirectionally conductive. If one-way conduction, the flow direction of hydraulic oil can only have one, for example flow to first chamber from second chamber, work as in this way When pressure in the first chamber is greater than the second chamber, pressure release movement can not be completed to the first chamber.If it is If bidirectionally conductive, the decompressor then needs to control the on-off repeatedly between the first chamber and the second chamber, I.e. the decompressor should control first chamber and be directed toward the second chamber one-way conduction or disconnection, also to control second chamber and refer to To the first chamber one-way conduction or disconnection, in first chamber to second chamber pressure release and second chamber to first chamber pressure release Switch repeatedly during two.Although control process is more troublesome, this is equally may be implemented in the balance pressure reducing valve of bidirectionally conductive The purpose of invention, should be within the scope of the present invention.

This programme is distinguished both one-way conduction states by two reversed decompressors of setting, can both be reduced Design difficulty keeps structure simpler, and reduces operation difficulty, is conducive to simplified control program.Meanwhile in both direction Pressure leak process is not interfere with each other, and keeps the flowing of hydraulic oil more smooth, and then further increase effect of easing stress.It is understood that The quantity of the oil passage may be three, four or more, but should include at least one by single in first chamber The oil excessively that the oil passage of second chamber is led in direction or at least one leads to first chamber by one direction in second chamber is logical Road.Two decompressors, which are arranged, to be meaned to can be controlled separately the on-off of different directions.It is high for the vibration frequency for the oil cylinder that pressurizes, Surge can accomplish to react in time, in the shorter time, pressure is discharged, to reach more the case where being formed in short-term Rapid effect of easing stress, further decrease pressurization oil cylinder be hit pressure destroy a possibility that.Those skilled in the art can manage Solution, when first oil passage conducting, second oil passage is to disconnect；When second oil passage is led When logical, first oil passage is to disconnect, it is impossible to the case where being simultaneously turned on there are two oil passages, but can be with The case where being simultaneously switched off there are two oil passages.

In any of the above-described technical solution, the pressurization oil cylinder, further includes: sealing element and at least one piston support Ring, the sealing element are set on the lateral wall of the piston, and are sealed and cooperated with the inner sidewall of the cylinder body, the piston branch Pushing out ring is arranged between the piston and the inner sidewall of the cylinder body.

It is provided with annular groove on the lateral wall of piston, the sealing element is embedded in annular groove, the appearance of sealing element The inner sidewall of face and the cylinder body is tightly connected, and improves the sealing performance between first chamber and second chamber.In addition, piston It is arranged fluted on lateral wall, for installing piston support ring, guarantees that piston remains to work normally under high-pressure situations, further Improve the functional reliability of piston.Further, the quantity of the piston support ring can be two, be located at the sealing The two sides of part can prevent piston rod in oil cylinder when reciprocating movement, and sealing element is extruded, and cause sealing to go wrong, piston The pressure intercommunication at both ends causes there is a situation where pressurization cylinder thrust is insufficient or operating rate decline, to influence hydraulic cylinder Working efficiency.It can be further improved the sealing reliability of piston by the way that piston support ring is arranged.Wherein, the sealing element can Think ZP sealing element, ZP sealing element for other sealing elements, sliding surface be enhanced using clamping cloth so that even if Prolonged high voltage static state reduces frictional force and starting there is also enough lubrications between sealing element and cylinder barrel in this way Frictional force reduces the abrasion of seal surface, can extend the service life of sealing element.

In any of the above-described technical solution, the pressurization oil cylinder further include: rotation connection head and bolster；Wherein, described At least part of connector groove for accommodating the rotation connection head is provided on the lateral wall of cylinder bottom, the rotation connects Connector is flexibly connected with cylinder bottom, and the bolster is set on the rotation connection head.

The outside of cylinder barrel is provided with rotation connection head, rotation connection head includes rotation section and interconnecting piece, in the outer of cylinder bottom One end on side wall far from piston rod is provided with connector groove, and the shape of connector groove corresponds to the rotation connection head rotation The shape in portion, rotation connection some or all of head rotation section are mounted in the connector groove, and can connect Rotation in head groove.Bolster is arranged on interconnecting piece, the bolster can be contacted with cylinder bottom, can also be with cylinder bottom gap Cooperation is rotatablely connected head whipping impact pressurization oil cylinder tail portion (including cylinder bottom) together with bolster that is, when the oil cylinder that pressurizes shakes, It is rotatablely connected head when impact to swing therewith, and is contacted with bolster, most of impact force is transmitted to by pressurization oil cylinder in shaking It being rotatablely connected on head, then is cooperated by rotation connection head and bolster, bolster plays the role of absorbing pressurization oil cylinder impact force, Slow down the impact shaken to cylinder barrel, so that protection cylinder barrel will not bending deformation.On the other hand, described that bolster is socketed in rotation Also it can protect rotation connection head on connector not severed or be deformed in the shaking or vibration of cylinder barrel, be conducive to rotate The long-time service of connector.

Optionally, the rotation connection head is ballhead, since ballhead can be rotated with 360 degree, can be alleviated outside cylinder bottom The impact force of side all directions can play comprehensive protective effect.The bolster can be made of flexible material, Such as bolster is elastic ring, the elastic ring is rubber ring, range of the shore hardness of the rubber ring at 50 degree to 70 degree It is interior, it can have better elastic reaction, further absorb the impact force on pressurization oil cylinder, elimination pressurization oil cylinder shakes impact and makes At oil cylinder tail break, cylinder barrel bending etc. phenomena of the failure.Optionally, peace is provided between the bolster and the cylinder bottom Loading board is mounted on the cylinder bottom by fastener, and mounting plate can be made of hard material, enough to provide bolster Buffering vibration and impact are played the role of in support, while mounting plate can play used in limit rotation connection head, prevent in oil During cylinder shakes, the rotation connection head is disconnected a groove.In this way, can also be improved institute by setting mounting plate State the job stability of rotation connection head.

In any of the above-described technical solution, the pressurization oil cylinder further include: at least one hydraulic fluid port seat is arranged in the cylinder barrel Lateral wall on, the hydraulic fluid port seat includes hydraulic fluid port, and the hydraulic fluid port penetrates through the hydraulic fluid port seat, and with the first chamber or described the Two chambers；Oil pipe, one end of the oil pipe is connected with the hydraulic fluid port seat, and is connected to the hydraulic fluid port；Clamping piece, setting exist On the lateral wall of the cylinder barrel, for clamping the oil pipe；Wherein, the pressurization oil cylinder further includes resilient cushion, is arranged described Between clamping piece and the oil pipe, the part clamped by the clamping piece on the oil pipe is at least wrapped up；And/or filtration members, It is arranged in the hydraulic fluid port, for filtering the hydraulic oil for the oil cylinder that pressurizes described in inflow and outflow, the filtration members include at least one Fixing piece and at least one filter screen being arranged on the fixing piece, the filter screen are connected on the fixing piece.

Pressurization oil cylinder is provided with hydraulic fluid port seat on the lateral wall of the cylinder body, wherein can be a hydraulic fluid port seat and corresponds to institute Stating first chamber, perhaps a hydraulic fluid port seat corresponds to the second chamber or two hydraulic fluid port seats respectively correspond first chamber and Two chambers, hydraulic fluid port seat is hollow, is provided with hydraulic fluid port, and one end of hydraulic fluid port is connected to oil pipe, the corresponding chamber of other end connection, and leads to Hydraulic fluid port is crossed, hydraulic oil is inputted into first chamber or second chamber, the liquid being also possible in first chamber or second chamber by oil pipe Pressure oil is output in oil pipe by hydraulic fluid port.When oil cylinder shakes and vibrates, clamping piece is arranged on the lateral wall of the cylinder barrel, For clamping the oil pipe, the clamping piece for not increasing resilient cushion can constantly vibrate friction with oil pipe, and the outer wall of oil pipe is caused to grind Damage, oil pipe will crack oil leak from clamping piece for a long time, and resilient cushion is arranged and exists by increasing resilient cushion by the technical program Between the part that the clamping piece and oil pipe are clamped, the part being clamped on the oil pipe is at least wrapped up, it is possible to reduce clamping Friction between part and oil pipe, to improve the service life of oil pipe.In addition, the vibration of oil pipe can be effectively reduced by resilient cushion Swing frequency, when cylinder barrel shakes, the impact force of cylinder barrel can be transmitted on oil pipe by hydraulic fluid port seat and clamping piece, be generated to oil pipe Impact, resilient cushion can play buffer function, absorb in impact, play the role of protecting oil pipe, further solve oil pipe cracking The problem of.

Optionally, the clamping piece includes: at least one pipe clamp seat, is fixedly connected with the cylinder barrel；Pipe clamp is arranged in institute It states on pipe clamp seat, to clamp the oil pipe.During oil pipe is installed, first oil pipe is arranged on pipe clamp seat, passes through pipe Holder can play position-limiting action to oil pipe.Pipe clamp is matched with pipe clamp seat later, by a part of oil pipe be fixed on pipe clamp with Pipe clamp seat snaps together in the annulus to be formed.In addition, wrapping this part of oil pipe by resilient cushion, can reduce Friction between oil pipe and pipe clamp seat, between oil pipe and pipe clamp, resilient cushion can be dumbbell shape, can provide and more fully wrap Wrap up in effect；Simultaneously because resilient cushion is flexible material, for example the resilient cushion can be rubber pad, and the shore of the rubber pad is hard Degree can further function as the fixation and cushioning effect more stable to oil pipe in the range of 63 degree to 83 degree.

In addition, the quantity of the pipe clamp seat be it is multiple, along the cylinder body length direction be arranged, can play to oil pipe more Good fixes and supports effect, by the multiple pipe clamp seats of setting, quite with the oil pipe is divided into multiple short tubes, relative to long tube For, short tube can accordingly reduce the percussion of oil cylinder, to keep oil pipe more stable, shockproof effect is more preferable.Wantonly one or two Being equidistant between the adjacent pipe clamp seat is directed to different usage scenarios certainly, and the shaking degree of cylinder barrel is also different, If shaking degree is big, the arrangement between pipe clamp seat can be made more even closer, for example, the distance between wantonly one or two of pipe clamp seat Less than or equal to 1 meter；If shaking degree is small, it can also adjust accordingly.

Optionally, filtration members, the cross-sectional area of the cross section of the filtration members and the hydraulic fluid port are provided in hydraulic fluid port It is identical, when making hydraulic oil by the hydraulic fluid port, filtered by the filtration members.By the way that filtration members are arranged, reduce in hydraulic oil Impurity, promote the cleannes of hydraulic oil, can be effectively prevented the impurity in hydraulic oil be blocked in pressurization oil cylinder oil passage In or stuck oil passage in decompressor, and then to guarantee the unimpeded of oil circuit, while being also possible to prevent in pressurization oil cylinder The equipment blocking or stuck that outside is connect with oil pipe, influences its normal use.In this way by setting filtration members, more avoid Since the problem of hydraulic oil leads to the possibility of effect of easing stress reduction or other equipment faults, to further increase pressurization oil cylinder Functional reliability.In addition, the filtration members are connected through a screw thread, are clamped connection setting in the hydraulic fluid port, can play more preferable Fixed function so that the functional reliability of filtration members further increases.

Wherein, filtration members can be including at least one fixing piece and at least one filtering being arranged on the fixing piece The composite structure of net, the filter screen are connected on the fixing piece.For example, the composite structure can be by hollow screw plug and gold Belong to filter screen composition, screw plug is screwed into hydraulic fluid port by external screw thread, and metal filter screen is arranged in the through-hole of hollow screw plug, and is screwed into It is fixedly connected in the internal screw thread of screw plug, since the material of filter screen is metal, hardness is higher, and impact resistance is stronger and not rapid wear It is bad, it can be subjected to high pressure impact, the job stability of filtration members is helped to improve and adapt to and pressurize what oil cylinder acutely shook Working environment.It is understood that filter screen can be steel wire filter screen, same matched fixing piece is also possible to steel ring Deng such impact resistance is stronger, and structure is more firm.Fixing piece can be connected through a screw thread, be clamped or gland-type connection is set It sets in the hydraulic fluid port.

In any of the above-described technical solution, the pressurization oil cylinder, further includes: spacer deviates from the cylinder with the piston The one end at bottom is connected, and is set on the piston rod, cooperates with the cylinder gap.

Since piston rod moves back and forth in cylinder barrel, when piston rod stretches out cylinder barrel, the entire length for the oil cylinder that pressurizes is lengthened, The distance between the fixing piece of pressurization oil cylinder is elongated.When oil cylinder shakes, the arm of force of piston rod increases, so that piston rod received Impact force is bigger.For this purpose, this programme is provided with spacer on one end away from the cylinder bottom of the piston, and by the spacer set If piston rod on.Due to playing position-limiting action to spacer by piston, with the stretching of piston rod, spacer in cylinder barrel relative to The length direction horizontal displacement of cylinder body is stretched out to the side far from cylinder bottom.The connection for reinforcing piston rod and piston by spacer is long Degree enhances cylinder body to the bearing length of piston rod, can effectively improve piston rod stability in this way, prevent piston rod because stretching It is too long out and be bent, to improve the service life of piston rod.On the other hand, every being set on inside oil cylinder, with cylinder gap Cooperation, is not slidably connected, because without generating abnormal sound with the oil cylinder inner sidewall.

In any of the above-described technical solution, the pressurization oil cylinder further include: hinged shaft, one end of the hinged shaft and the cylinder body One end far from the cylinder bottom is connected；Guide sleeve is set on the first end, and part is inserted into the hinged shaft, The one end of the guide sleeve far from the cylinder bottom is connect with the other end of the hinged shaft by fastener；Support construction, setting exist Between the lateral wall of the first end and the inner sidewall of the guide sleeve；First sealing structure is set in the first end Lateral wall on, and with the guide sleeve be tightly connected；Wherein, the support construction includes metallic supports and clamping cloth support Part, the metallic supports and clamping cloth supporting element are arranged along first end length direction interval, first sealing structure Including the first cushion seal circle, the first cushion seal circle is arranged between the metallic supports and clamping cloth supporting element.

When being shaken due to pressurization oil cylinder, for piston rod in reciprocating movement, the part for stretching out cylinder body can generate very big unbalance loading, Often piston rod can generate pull, bending deformation a series of problems, such as.For this purpose, being lived present solution provides support construction with stablizing Stopper rod stretches out the part of cylinder body, reduces the shaking of piston rod.It is supported by being provided with metallic supports and clamping cloth in guide sleeve Part combination, the metallic supports structure can play guiding role, prevent cylinder barrel and piston rod abrasion and foreign matter from entering branch Cylinder body or sealing ring are caused to wear in pushing out ring, simultaneously because metallic supports, have the function of absorbing vibration, and have fabulous Wearability.Simultaneously in guide sleeve along first end to the second end length direction, metallic supports setting is in the first buffering The front end of sealing ring, installation site towards piston rod packing on the pressure side, in this way, the surge under high load capacity can be absorbed, Completely cut off high temperature fluid, improves the durability of sealing element, while can reduce due to piston rod and guide sleeve friction surface temperature liter The failure of oil film caused by height, reduces the abrasion of the first cushion seal circle.In addition, being set in the rear end of the first cushion seal circle It is equipped with plus cloth supports, cloth support is added both to have the function of support, lateral bear can also be born in the reciprocating motion of piston rod It carries, piston rod is avoided to contact with the direct of wire sleeve, to reduce the abrasion of the two.Meanwhile it is small to add the surface design of cloth to have Recess provides lubrication for retaining liquid, further reduced frictional force and starting frictional force in this way, to reduce abrasion, or Be conducive to improve the speed of piston rod reciprocating movement.It is understood that metallic supports and clamping cloth supporting element are located at The two sides of one cushion seal circle can effectively prevent the first cushion seal circle and be extruded in a groove, influence sealing performance, because And help to improve the sealing reliability of the first cushion seal circle.

Optionally, the material of the metallic supports is PTFE+ copper powder coating, and the clamping cloth supporting element is phenolic aldehyde clamping cloth, Wherein, the installation site of metallic supports towards piston rod packing on the pressure side, in this way, due to PTFE (fluorocarbon resin) have it is low It is the advantages that friction, corrosion-resistant, thermal stability, especially corrosion resistance, more excellent than common metal material or nonmetallic materials, also The impact under higher high load capacity can be absorbed by obtaining higher bearing capacity with the cooperation of copper powder coating in flexible and toughness Pressure further alleviates surge, at the same reduce piston rod hermetic resistance and piston rod sliding in, the fever of sealing element is asked Topic.It is understood that guide sleeve is fluted towards being arranged on the inner surface of piston rod, for limiting metallic supports, clamping cloth The position of supporting element and the first cushion seal circle, and several grooves may be used interchangeably, mounting means is simple and convenient.Due to phenol Aldehyde clamping cloth mechanical performance with higher, can provide better wearability and corrosion resistance, can achieve long service life, section The effect of cost-saving.

Further optionally, the first cushion seal circle is HBY sealing ring or HBTS sealing ring.Can preferably it alleviate Surge under high load capacity, while high temperature can be prevented to be transmitted to, first along first end to the second end length direction On other sealing rings of cushion seal circle rear end.Simultaneously for other sealing rings, it is extruded through pressure axial action When, sealing force can be increased on year-on-year basis with pressure, wherein can be by combining with lip-type packing, to eliminate high pressure, high-speed cruising The reliability that vibrates, can be further improved sealing system has good oil when interior travel speed is greater than outer stroke speed Film pumpback ability reduces abrasion so that keeping lubricant effect.

It is understood that present solution provides the scheme of metallic supports and clamping cloth supporting element, when being equipped in work When spacer structure beyond the Great Wall, support is each provided with to the both ends of piston rod, so that it is steady when stretching out work to improve piston rod It is qualitative can, effectively reduce piston rod pull, curved failure.

In the above-mentioned technical solutions, first sealing structure further includes piston rod seals and dustband, and described first Cushion seal circle, the piston rod seals and the dustband along as the piston rod as the second end be directed toward described in It arranges in the direction of first end；And/or the pressurization oil cylinder further includes second seals structure, the second seals structure is set in Between the guide sleeve and the hinged shaft, the second seals structure includes the second cushion seal circle and retaining ring.

Along the direction for being directed toward the first end by the second end by the piston rod, the first sealing structure is successively It is provided with the first cushion seal circle, the piston rod seals and dustband arrangement.Wherein, piston rod seals mainly rise Sealing function further increases the sealing effect of second chamber, and optionally, piston rod seals are IUH sealing ring, is also possible to The group of one or more of the piston rod seals such as IDI sealing ring, ISI sealing ring, IUH sealing ring, UPI sealing ring or V99F It closes；Dustband is used to prevent external particle from entering inside oil cylinder, to avoid friction is generated between piston rod and guide sleeve, causes Abrasion, optionally, retaining ring are one in the dustbands such as DKBZ3 framework dustproof loop, DWI dustband, DKH dustband, LBH dustband Kind.

On the other hand, the pressurization oil cylinder further includes second seals structure, and the second seals structure is set in described lead To between set and the hinged shaft, the second seals structure includes the second cushion seal circle and retaining ring.Guide sleeve and hinged shaft it Between be provided with the second cushion seal circle, pressure in second chamber can be slowed down for the percussion of guide sleeve, while improving and leading To the leakproofness between set and hinged shaft, the leakage of hydraulic oil is avoided.Wherein, the second cushion seal circle can be high-pressure buffer K08- D sealing element, the K08-D sealing part works service life is long, the sealing function in the low environment that is more suitable for rubbing, and can play more preferable close Envelope and buffering effect, are in addition arranged inner seal ring between K08-D sealing element and guide sleeve, also select different inner seal rings with suitable For broader temperature range and working media, extend working life, saves cost.

Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention Recognize.

Detailed description of the invention

Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:

Fig. 1 is the schematic diagram of the section structure of pressurization oil cylinder described in one embodiment of the invention；

Fig. 2 is the structural schematic diagram of pressurization oil cylinder described in one embodiment of the invention；

Fig. 3 is the enlarged structure schematic diagram of A portion shown in Fig. 1；

Fig. 4 is the enlarged structure schematic diagram of B portion shown in Fig. 1；

Fig. 5 is the enlarged structure schematic diagram of C portion shown in Fig. 1.

Wherein, the corresponding relationship between appended drawing reference and component names of the Fig. 1 into Fig. 5 are as follows:

1 cylinder barrel；11 cylinder bodies；101 first chambers；103 second chambers；13 cylinder bottoms；131 connector grooves；133 rotation connections Head；135 mounting plates；137 bolsters；15 hinged shafts；17 guide sleeves；171 support constructions；1711 metallic supports；1713 clamping cloth branch Support member；173 first sealing structures；1731 first cushion seal circles；1733 piston rod seals；1735 dustbands；175 second is close Seal structure；1751 second cushion seal circles；1753 retaining rings；19 hydraulic fluid port seats；191 hydraulic fluid ports；193 clamping pieces；1931 pipe clamp seats；1933 Pipe clamp；195 resilient cushions；197 filtration members；1971 fixing pieces；1973 filter screens；3 piston rods；31 first ends；33 the second ends； 5 pistons；501 oil passages；503 spool chambers；5033 avoiding spaces；51 balance pressure reducing valves；511 valve hole parts；5111 cock bodys； 5113 elastic components；5115 stop parts；5117 cock body sealing rings；53 sealing elements；59 piston support rings；57 spacers；7 oil pipes.

Specific embodiment

To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application Feature in example and embodiment can be combined with each other.

In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below Specific embodiment limitation.

Referring to the pressurization oil cylinder of Fig. 1 to Fig. 5 description according to some embodiments of the invention.

As depicted in figs. 1 and 2, pressurization oil cylinder includes cylinder barrel 1, piston rod 3, piston 5 and the decompression dress being arranged in piston 5 It sets.

Embodiment one

As shown in Figure 1, pressurization oil cylinder is provided with cylinder barrel 1, including cylinder body 11 and the cylinder bottom being connected with cylinder body 11 13；Piston Bar 3, including first end 31 and the second end 33, the second end 33 are inserted into cylinder barrel 1, along 1 reciprocating movement of cylinder barrel；Piston 5, be located in cylinder barrel 1, and be set on the second end 33, with the second end 33 in cylinder barrel 1 reciprocating movement；Wherein, cylinder bottom 13, One end of the second end 33, cylinder body 11 and piston 5 towards cylinder bottom 13, which is enclosed, sets out first chamber 101, piston rod 3, cylinder body 11 and work Plug 5 is enclosed away from one end of cylinder bottom 13 sets out second chamber 103.At least one decompressor is provided in piston 5, decompressor connects Logical first chamber 101 and second chamber 103, for controlling the on-off between first chamber 101 and second chamber 103.

At work, piston rod 3 moves back and forth pressurization oil cylinder provided in this embodiment in cylinder barrel 1, is arranged on piston rod 3 There is piston 5, piston 5 is set on the first end 31 of piston rod 3, and piston 5 plays the role of sealing, and both ends are opposing seals First chamber 101 and second chamber 103.When piston rod 3 to 13 direction of cylinder bottom when moving, piston 5 is equally to 13 direction of cylinder bottom The space of first chamber 101 is compressed in movement, and since first chamber 101 is relatively closed space, the indoor pressure of chamber can become Greatly, while the hydraulic oil in first chamber 101 can be under the promotion of piston 5, to 13 He of cylinder bottom for being located at 101 one end of first chamber Cylinder body 11 generates impact, and the pressure for impacting generation can make 1 expanding distortion of cylinder barrel when reaching a certain level, and then to destruction cylinder barrel 1.The present invention compared to the prior art, by by decompressor be arranged on piston 5, to control first chamber 101 and the second chamber Connection between room 103 when one pressure is excessive in first chamber 101 and second chamber 103, can quickly carry out pressure Release, such as the liquid when the pressure in first chamber 101 is greater than second chamber 103 and reaches a certain level, in first chamber 101 Pressure oil can flow to second chamber 103 under the action of pressure difference, and then alleviate the pressure in first chamber 101.Although likewise, Hydraulic oil in first chamber 101 also generates impact to the cylinder bottom 13 and cylinder body 11 that are located at 101 one end of first chamber, but due to the One chamber 101 is no longer sealing structure, and generated surge can also run through decompressor and be discharged into second chamber 103, in this way by letting out the big chamber of pressure indoor pressure in the small chamber of pressure, first chamber 101 can be effectively reduced The cylinder barrel 1 of one end is hit pressure a possibility that being destroyed, to achieve the purpose that protection pressurization oil cylinder.Relative to by decompressor It is located at for the embodiment outside cylinder barrel 1 or on non-piston 5, decompressor is arranged on piston 5, decompressor pair can be made The abrupt change of pressure accomplishes to react in time, discharges first chamber 101 or second chamber in time before compression shock cylinder tube 1 Pressure in 103 in the high side of pressure extends making for pressurization oil cylinder so that oil cylinder offer be effectively protected rapidly to play With the effect in service life.

The on-off between first chamber 101 and second chamber 103 is controlled by the unlatching and closure of decompressor, i.e., not It is normally opened or normally closed.Pressure during 3 reciprocating movement of piston rod, between first chamber 101 and second chamber 103 When difference is greater than a certain preset range, decompressor is opened, and completes the connection movement between first chamber 101 and second chamber 103, So that the big indoor pressure of chamber of pressure is let out in the small chamber of pressure；And between first chamber 101 and second chamber 103 When pressure difference is less than the unlocking condition of decompressor, decompressor closure, first chamber 101 and second chamber 103 are in partition State, opposing seal not intercommunication pressure between the two, in this state, even it will be understood by those in the art that the first chamber There are certain pressure in room 101 or in second chamber 103, cylinder barrel 1 can be born completely, thus will not be generated to pressurization oil cylinder Destruction.

Decompressor helps to alleviate the internal pressure of pressurization oil cylinder, the pressure balance of Shi Liang side cavity, and then works as piston 5 On when being provided with multiple decompressors, alleviating the process released stress can more quickly complete, and be made with playing preferably protection With, avoid the surge of higher frequency to pressurization oil cylinder destruction.In addition, due in first chamber 101 or second chamber 103 Pressure can alleviate release by rapid, to reduce the indoor pressure of chamber to the percussion of cylinder barrel 1, and then can be corresponding The design requirement for 1 thickness of cylinder barrel is reduced, to achieve the effect that save cost.

Embodiment two

On the basis of example 1, further, as shown in Figure 1, decompressor includes balance pressure reducing valve 51, balance subtracts One in the input end connection first chamber 101 and second chamber 103 of pressure valve 51, the outlet end of balance pressure reducing valve 51 connection the Another in one chamber 101 and second chamber 103.

Pressurization oil cylinder provided in this embodiment is mutual by the pressure that 5 both ends of piston may be implemented in setting balance pressure reducing valve 51 It is logical, at one end when pressure abruptly increase, pressure can be discharged into the other end, so that the compression shock to cylinder body 11 is reduced, by setting The decompressor in oil passage 501 is set, to control the on-off of oil passage 501, is accomplished in the automatic cylinder barrel 1 of release in time The pressure of pressure abruptly increase one end, so that rapid effective protection is provided to oil cylinder, to play the effect for extending pressurization oil cylinder service life Fruit.Since balance pressure reducing valve 51 is relatively common, as long as issuing corresponding channel on piston 5, then decompression is installed in channel Valve, structure is simple, easy for installation.In addition for the form of piston 5 also there is no limit, such as piston 5 can be one it is complete Whole entirety or piston 5 is also possible to opposite opened, will after the groove that corresponding balance pressure reducing valve 51 is opened up out on piston 5 Balance pressure reducing valve 51, which is put into that 5 split of opposite opened piston is sealed again, completes installation.In this way, balance can be further simplified The installation process of pressure reducing valve 51.

Embodiment three

On the basis of implementing one, as shown in Fig. 2, decompressor includes oil passage 501 and spool chamber 503, oil excessively is logical The both ends in road 501 are respectively communicated with first chamber 101 and second chamber 103, and part spool chamber 503 is connected with oil passage 501, Movable valve hole part 511 is provided in spool chamber 503, valve hole part 511 is by the way that sliding controlled back and forth in spool chamber 503 The on-off in oily channel 501, to control the on-off between first chamber 101 and second chamber 103.

The component with decompression is arranged in pressurization oil cylinder provided in this embodiment in piston 5, advantageously reduces cost, And structure is simple, while being conducive to advanced optimize the size of piston 5.In the present embodiment, oil passage 501 is connected to the first chamber The oil passage 501 of room 101 and second chamber 103, part spool chamber 503 are connected with oil passage 501, in unidirectional pressure release Cheng Zhong, hydraulic oil, the side high from pressure flow to the low side of pressure, both also go through part spool by oil passage 501 Chamber 503, it is seen that be to be connected to by oil passage 501 with part spool chamber 503 between first chamber 101 and second chamber 103. Movable valve hole part 511 is provided in spool chamber 503 simultaneously, valve hole part 511 can be movable in spool chamber 503, in cunning When moving oil passage 501, oil passage 501 can be blocked, plays and separates first chamber 101 and second chamber 103 Effect.Chamber and second chamber 103 are separated by setting spool chamber 503 and valve hole part 511, better seal can be played Effect, while providing installation space to valve hole part 511, makes easier for installation, also provides more to valve hole part 511 Flexible action space is controlled the size of 501 flow section of oil passage by valve hole part 511, can also further control liquid The velocity of liquid assets of pressure oil can promote the on-off effect of valve hole part 511, more to meet the needs of different operating conditions.

On the other hand, oil passage 501 and spool chamber 503 can have different combinations in piston 5, so that mistake Oily channel 501 generates more smooth turn-on effect.Such as opening direction of the oil passage 501 on piston 5, oil passage 501 With the communicating position, oil passage 501 and the geomery of spool chamber 503 of spool chamber 503 etc..Due to can make spool chamber 503 Interior valve hole part 511 plays the role of controlling oil passage 501, to be able to achieve the purpose of the present invention, and without de- From design philosophy and objective of the invention, thus should all be within the scope of the present invention, this is no longer going to repeat them.It can manage The diameter of solution, spool chamber 503 can be with the diameter of oil passage 501, so that the diameter of valve hole part 511 is greater than oil passage 501 diameter, the area of section that such valve hole part 511 blocks can be bigger, play better seal effect, further increase The reliability of valve hole part 511 prevents first chamber 101 and second chamber in the case where oil passage 501 disconnects Intercommunication pressure between 103 causes there is a situation where pressurization cylinder thrust is insufficient or operating rate decline, to influence hydraulic cylinder Working efficiency.

Further, as shown in Fig. 2, valve hole part 511 includes cock body 5111 and the elastic component matched with cock body 5111 5113, spool chamber 503 includes avoiding space 5033, and cock body 5111 moves back and forth in spool chamber 503, wherein cock body 5111 exists Enter avoiding space 5033 and compression elastic piece 5113 under the action of oil pressure so that first chamber 101 and second chamber 103 is connected, and Avoiding space 5033 is left under the reseting elasticity effect of elastic component 5113 to separate first chamber 101 and second chamber 103.

When first chamber 101 and the one of internal pressure of second chamber 103 are greater than the pressure of another inside, The both ends of oil passage 501 form pressure difference, and for hydraulic oil under the action of pressure difference, a side big from pressure is to oil passage The side flowing that pressure is small in 501, piston 5 is pushed open, cock body 5111 is made to leave the position for blocking oil passage 501, thus Make to be connected between first chamber 101 and second chamber 103, make the pressure balance at 501 both ends of oil passage, pressure difference reduces；Plug Body 5111 squeezes elastic component 5113, and elastic component 5113 generates tension, and when tension force of spring is greater than pressure difference, elastic component 5113 is extensive Shape is restored, pushes cock body 5111 to blocking the position of oil passage 501 to slide, to make first chamber 101 and second chamber 103 Between be isolated.

Specifically, elastic component 5113 can be spring, by the way that the coefficient of elasticity of spring is arranged, the work of pressure can control With range, when the pressure difference at 501 both ends of oil passage is less than the predetermined value of spring-compressed, spring is not deformed, the first chamber It is not turned between room 101 and second chamber 103, without pressure release.Cock body 5111 under normal conditions, is arranged in spool chamber 503 Excessively oily space in, block in oil passage 501 so that oil passage 501 is in an off state, first chamber 101 and the Two chambers 103 are mutually isolated.When first chamber 101 and the one of internal pressure of second chamber 103 are greater than inside another Pressure when, such as when the pressure in first chamber 101 be greater than second chamber 103 in pressure when, 501 both ends of oil passage Pressure difference, it will act on cock body 5111, then spring is squeezed by cock body 5111, when the pressure for giving cock body 5111 is greater than bullet When the predetermined value of spring compression, spring is compressed, and then enters cock body 5111 in avoiding space 5033, and also oil is logical excessively for cock body 5111 It is removed in road 501, the state for being on oil passage 501.After oil passage 501 is connected, first chamber 101 and the second chamber Start pressure release movement between room 103, the intracorporal pressure of the two chambers is made to tend to balance, pressure difference reduces, when pressure difference is reduced to Less than spring-compressed predetermined value when, be insufficient to allow spring generate compressive deformation, spring restore to the original state, made by tension force of spring It, by being released in avoiding space 5033, is returned in oil passage 501 to separate first chamber 101 and second chamber with by cock body 5111 103, complete pressure leak process.

Pressurization oil cylinder provided in this embodiment is by setting cock body 5111 for valve hole part 511 and matching with cock body 5111 The elastic component 5113 of conjunction realizes the switching between two states of the conducting of oil passage 501 and closure, and structure is simple and easy for installation, Cost is advantageously reduced, while further reduced operation difficulty, is conducive to simplified control program.Certainly, elastic component 5113 Can be with reed, deformation after bellows etc. is force-applied, restorable component after not stressing.It is understood that elastic component 5113 In avoiding space 5033, the stability for improving valve hole part 511 can be conducive to avoid the interference for excessively oily space.

Further, valve hole part 511 can also include stop part 5115, and spool chamber 503 is arranged in stop part 5115 Far from one end of cock body 5111 in avoiding space 5033, for preventing elastic component 5113 to be detached from spool chamber 503.By the way that backstop is arranged Part 5115 can make spring be not easily disconnected from original predetermined position in stress, and the work for further increasing valve hole part 511 is steady It is qualitative.In addition, stop part 5115, which can be hollow screw plug, is also possible to blind plugging, when for blind plugging, valve hole part 511 can be improved Sealing performance, and then further improve the reliability of valve hole part 511.In the case where oil passage 501 disconnects, prevent There is intercommunication pressure between first chamber 101 and second chamber 103, leads to that pressurization cylinder thrust deficiency or operating rate occurs The case where decline, to influence the working efficiency of hydraulic cylinder.

Further, the annular recess coaxial with spool chamber 503, setting in annular recess are also provided on cock body 5111 There is cock body sealing ring 5117, the outside of cock body sealing ring 5117 and the sealing of spool chamber 503 cooperate.By the way that cock body sealing ring is arranged 5117 can be further improved the sealing performance of valve hole part 511, so that the use for further increasing valve hole part 511 is reliable Property.In addition, the position-limiting action to cock body sealing ring 5117 can be played by being provided with annular recess, make cock body sealing ring 5117 process easier for installation, while being moved back and forth between excessively oily space in cock body 5111 in avoiding space 5033 In, the displacement of cock body sealing ring 5117 can be prevented or fallen off, the use reliability of valve hole part 511 is further increased.

Example IV

On the basis of example 1, further, the quantity of decompressor be two, one of decompressor into Mouth end connects first chamber 101, and outlet end connects second chamber 103, and the input end of another decompressor connects second chamber 103, outlet end connects first chamber 101, so that each decompressor is able to carry out unidirectional pressure release, two decompressors can be into Row double-direction relief.

The quantity of decompressor is two, two decompressor reversed arrangements.

Balance pressure reducing valve 51 included the case where for decompressor, the input end connection of one of balance pressure reducing valve 51 the One chamber 101, outlet end are connected to second chamber 103；The input end of another one balance pressure reducing valve 51 is connected to second chamber 103, outlet end is connected to first chamber 101.

Oil passage 501 and spool chamber 503, one of oil passage 501 and valve are included the case where for decompressor 503 internal valve core components 511 of core cavity are used to control one-way conduction or the disconnection that second chamber 103 is directed toward by first chamber 101；It is another A oil passage 501 and 503 internal valve core components 511 of spool chamber are used to control the list for being directed toward first chamber 101 by second chamber 103 To being turned on or off.

When being only provided with a decompressor, decompressor can be one-way conduction and be also possible to bidirectionally conductive.If If being one-way conduction, the flow direction of hydraulic oil can only have one, for example flow to first chamber 101 from second chamber 103, exist in this way When the pressure in first chamber 101 is greater than second chamber 103, pressure release movement can not be completed to first chamber 101.If it is double If conducting, decompressor then needs to control the on-off repeatedly between first chamber 101 and second chamber 103, the i.e. decompression Device should control first chamber 101 and be directed toward 103 one-way conduction of second chamber or disconnection, also control the direction of second chamber 103 101 one-way conduction of first chamber or disconnection, in first chamber 101 to 103 pressure release of second chamber and second chamber 103 to the first chamber Switch repeatedly during 101 pressure release of room two.Although control process is more troublesome, the balance pressure reducing valve 51 of bidirectionally conductive is same The purpose of the present invention may be implemented, it should be within the scope of the present invention.

Pressurization oil cylinder provided in this embodiment is by being arranged two reversed decompressors for both one-way conduction states It distinguishes, can both reduce design difficulty, keep structure simpler, and reduce operation difficulty, be conducive to simplified control program. Meanwhile the pressure leak process in both direction is not interfere with each other, and keeps the flowing of hydraulic oil more smooth, and then further increases decompression effect Fruit.It it is understood that the quantity of oil passage 501 may be three, four or more, but should include at least one The oil passage 501 or at least one of second chamber 103 is led to by single in second chamber 103 by one direction in first chamber 101 The oil passage 501 of first chamber 101 is led in direction.Two decompressors, which are arranged, to be meaned to can be controlled separately different directions On-off.High for the vibration frequency for the oil cylinder that pressurizes, surge can accomplish to react in time, more the case where being formed in short-term In the short time, pressure is discharged, to reach more rapid effect of easing stress, further decrease pressurization oil cylinder be hit pressure destruction A possibility that.It will be appreciated by persons skilled in the art that second oil passage 501 is when the conducting of the first oil passage 501 It disconnects；When the conducting of the second oil passage 501, the first oil passage 501 is to disconnect, it is impossible to excessively oily there are two The case where channel 501 simultaneously turns on, but may exist the case where two oil passages 501 simultaneously switch off.

Embodiment five

In the technology of embodiment one, further, pressurize oil cylinder further include: sealing element 53 and at least one piston support Ring 59, sealing element 53 are set on the lateral wall of piston 5, and are sealed and cooperated with the inner sidewall of cylinder body 11, and piston support ring 59 is set It sets between piston 5 and the inner sidewall of cylinder body 11.

It is provided with annular groove on the lateral wall of piston 5, sealing element 53 is embedded in annular groove, the appearance of sealing element 53 The inner sidewall of face and cylinder body 11 is tightly connected, and improves the sealing performance between first chamber 101 and second chamber 103.In addition, living It is arranged fluted on the lateral wall of plug 5, for installing piston support ring 59, guarantees that piston 5 remains to normal work under high-pressure situations Make, further increases the functional reliability of piston 5.As shown in figure 3, further, the quantity of piston support ring 59 can be two It is a, the two sides of sealing element 53 are located at, can prevent piston rod 3 in oil cylinder when reciprocating movement, sealing element 53 is extruded, and is led Densification envelope goes wrong, the pressure intercommunication at 5 both ends of piston, leads to the feelings that pressurization cylinder thrust deficiency or operating rate decline occurs Condition, to influence the working efficiency of hydraulic cylinder.The sealing that can be further improved piston 5 by the way that piston support ring 59 is arranged can By property.Wherein, sealing element 53 can be ZP sealing element 53, and for other sealing elements 53, sliding surface is ZP sealing element 53 Enhanced using clamping cloth, so that even if there is also enough between sealing element 53 and cylinder barrel 1 in prolonged high voltage static state Lubrication, reduce in this way frictional force and starting frictional force, reduce the abrasion on 53 surface of sealing element, sealing element 53 can be extended Service life.

Embodiment six

In the technology of embodiment one, further, pressurize oil cylinder further include: rotation connection head 133 and bolster 137； Wherein, at least part of connector groove 131 for accommodating rotation connection head 133 is provided on the lateral wall of cylinder bottom 13, Rotation connection head 133 is flexibly connected with cylinder bottom 13, and bolster 137 is set on rotation connection head 133.

The outside of cylinder barrel 1 is provided with rotation connection head 133, rotation connection head 133 includes rotation section and interconnecting piece, in cylinder One end on the lateral wall at bottom 13 far from piston rod 3 is provided with connector groove 131, and the shape of connector groove 131 is corresponding to be turned The shape of dynamic 133 rotation section of connector, rotation connection some or all of 133 rotation section of head are mounted on connector groove In 131, and it can be rotated in connector groove 131.Bolster 137 is arranged on interconnecting piece, bolster 137 can be with cylinder Bottom 13 contacts, can also be with 13 clearance fit of cylinder bottom, i.e., when the oil cylinder that pressurizes shakes, rotation connection head 133 and bolster 137 1 Play whipping impact pressurization oil cylinder tail portion (including cylinder bottom 13), rotation connection head 133 is swung therewith when impact, and with bolster 137 Contact, most of impact force is transmitted on rotation connection head 133 by the oil cylinder that pressurizes in shaking, then passes through rotation connection head 133 Cooperating with bolster 137, bolster 137 plays the role of absorbing pressurization oil cylinder impact force, slow down the impact shaken to cylinder barrel 1, To which protection cylinder barrel 1 will not bending deformation.On the other hand, bolster 137 is socketed on rotation connection head 133 also can protect Rotation connection head 133 is not severed or is deformed in the shaking or vibration of cylinder barrel 1, and the length for being rotatablely connected head 133 is conducive to Phase uses.

Optionally, as shown in Figure 1, rotation connection head 133 is ballhead, since ballhead can be rotated with 360 degree, Ke Yihuan The impact force for solving 13 outside all directions of cylinder bottom, can play comprehensive protective effect.Bolster 137 can be by flexible Material is made, such as bolster 137 is elastic ring, and elastic ring is rubber ring, and the shore hardness of rubber ring is at 50 degree to 70 degree In range, better elastic reaction can have, further absorb the impact force on pressurization oil cylinder, eliminate pressurization oil cylinder and shake punching Oil cylinder tail break caused by hitting, the phenomena of the failure such as bending of cylinder barrel 1.Optionally, it is provided between bolster 137 and cylinder bottom 13 Mounting plate 135 is mounted on cylinder bottom 13 by fastener, and mounting plate 135 can be made of hard material, to bolster 137 Enough supports are provided, play the role of buffering vibration and impact, while mounting plate 135 can play rotation connection head 133 Used in limit, prevent during oil cylinder shakes, rotation connection head 133 is disconnected a groove 131.In this way, passing through setting Mounting plate 135 can also be improved the job stability of rotation connection head 133.

Embodiment seven

In the technology of embodiment one, further, pressurize oil cylinder further include: at least one hydraulic fluid port seat 19 is arranged in cylinder Cylinder 1 lateral wall on, hydraulic fluid port seat 19 include hydraulic fluid port 191, hydraulic fluid port 191 penetrate through hydraulic fluid port seat 19, and with first chamber 101 or the second chamber Room 103 is connected to；One end of oil pipe 7, oil pipe 7 is connected with hydraulic fluid port seat 19, and is connected to hydraulic fluid port 191；Clamping piece 193 is arranged in cylinder On the lateral wall of cylinder 1, for clamping oil pipe 7；Wherein, pressurization oil cylinder further includes resilient cushion 195, is arranged in clamping piece 193 and oil Between pipe 7, part clamped by part 193 at least is clamped on package oil pipe 7；And/or filtration members 197, it is arranged in hydraulic fluid port 191 Interior, for filtering the hydraulic oil of inflow and outflow pressurization oil cylinder, filtration members 197 include at least one fixing piece 1971 and setting solid Determine at least one filter screen 1973 on part 1971, filter screen 1973 is connected on fixing piece 1971.

Pressurization oil cylinder is provided with hydraulic fluid port seat 19 on the lateral wall of cylinder body 11, wherein it is corresponding to can be a hydraulic fluid port seat 19 Perhaps a corresponding second chamber 103 of hydraulic fluid port seat 19 or two hydraulic fluid port seats 19 respectively correspond first chamber to first chamber 101 101 and second chamber 103, hydraulic fluid port seat 19 is hollow, is provided with hydraulic fluid port 191, and one end of hydraulic fluid port 191 is connected to oil pipe 7, and the other end connects Lead to corresponding chamber, and by hydraulic fluid port 191, hydraulic oil is inputted into first chamber 101 or second chamber 103 by oil pipe 7, it can also To be that the hydraulic oil in first chamber 101 or second chamber 103 is output in oil pipe 7 by hydraulic fluid port 191.When oil cylinder shakes and shakes When dynamic, clamping piece 193 is arranged on the lateral wall of cylinder barrel 1, for clamping oil pipe 7, does not increase the clamping piece 193 of resilient cushion 195 The outer wall of oil pipe 7 can be caused to wear, oil pipe 7 will be opened from clamping piece 193 for a long time with the constantly vibration friction of oil pipe 7 Oil leak is split, the portion that clamping piece 193 and oil pipe 7 are clamped is arranged in by increasing resilient cushion 195, by resilient cushion 195 in the present embodiment /, the part being at least clamped on package oil pipe 7, it is possible to reduce the friction between clamping piece 193 and oil pipe 7, to mention The service life of high oil pipe 7.In addition, the amplitude-frequency of oil pipe 7 can be effectively reduced by resilient cushion 195, shaken in cylinder barrel 1 When, the impact force of cylinder barrel 1 can be transmitted on oil pipe 7 by hydraulic fluid port seat 19 and clamping piece 193, generate impact, damping to oil pipe 7 Pad 195 can play buffer function, absorb in impact, play the role of protecting oil pipe 7, what further solution oil pipe 7 cracked asks Topic.

Optionally, it as shown in Fig. 2, clamping piece 193 includes: at least one pipe clamp seat 1931, is fixedly connected with cylinder barrel 1；Pipe Folder 1933 is arranged on pipe clamp seat 1931, to clamp oil pipe 7.During oil pipe 7 are installed, first oil pipe 7 is arranged in pipe On holder 1931, position-limiting action can be played to oil pipe 7 by pipe clamp seat 1931.Pipe clamp 1933 and pipe clamp seat 1931 match later It closes, a part of oil pipe 7 is fixed on pipe clamp 1933 and pipe clamp seat 1931 snaps together in the annulus to be formed.In addition, This part that oil pipe 7 is wrapped by resilient cushion 195, can reduce between oil pipe 7 and pipe clamp seat 1931, oil pipe 7 and pipe clamp Friction between 1933, resilient cushion 195 can be dumbbell shape, can provide more fully package effect；Simultaneously because damping Pad 195 is flexible material, for example resilient cushion 195 can be rubber pad, range of the shore hardness of rubber pad at 63 degree to 83 degree It is interior, the fixation and cushioning effect more stable to oil pipe 7 can be further functioned as.

In addition, the quantity of pipe clamp seat 1931 be it is multiple, along cylinder body 11 length direction be arranged, can play to oil pipe 7 more Good fixes and supports effect, by the multiple pipe clamp seats 1931 of setting, quite with oil pipe 7 is divided into multiple short tubes, relative to length For pipe, short tube can accordingly reduce the percussion of oil cylinder, to keep oil pipe 7 more stable, shockproof effect is more preferable.Any two Being equidistant between a adjacent pipe clamp seat 1931, is directed to different usage scenarios certainly, and the shaking degree of cylinder barrel 1 is also different , if shaking degree is big, the arrangement between pipe clamp seat 1931 can be made more even closer, for example, wantonly one or two of pipe clamp seat 1931 Between distance be less than or equal to 1 meter；If shaking degree is small, it can also adjust accordingly.

Optionally, as shown in figure 4, being provided with filtration members 197 in hydraulic fluid port 191, the cross section of filtration members 197 and hydraulic fluid port 191 cross-sectional area is identical, when making hydraulic oil by hydraulic fluid port 191, is filtered by filtration members 197.By the way that filtration members are arranged 197, reduce hydraulic oil in impurity, promote the cleannes of hydraulic oil, can be effectively prevented the impurity in hydraulic oil be blocked in plus Decompressor 57 in the oil passage 501 of compressing cylinder or in stuck oil passage 501, and then to guarantee the unimpeded of oil circuit, together When be also possible to prevent the equipment that connect with oil pipe 7 outside pressurization oil cylinder and block or stuck, influence its normal use.It is logical in this way Setting filtration members 197 are crossed, more avoid the problem that causing due to hydraulic oil effect of easing stress from reducing or other equipment faults May, to further increase the functional reliability of pressurization oil cylinder.In addition, filtration members 197 be connected through a screw thread, be clamped connection set It sets in hydraulic fluid port 191, better fixed function can be played, so that the functional reliability of filtration members 197 further increases.

Wherein, filtration members 197 can be including at least one fixing piece 1971 and be arranged on fixing piece 1971 at least The composite structure of one filter screen 1973, filter screen 1973 are connected on fixing piece 1971.For example, the composite structure can be by Hollow screw plug and metal filter screen 1973 form, and screw plug is screwed into hydraulic fluid port 191 by external screw thread, and the setting of metal filter screen 1973 exists It in the through-hole of hollow screw plug, and is screwed into the internal screw thread of screw plug and is fixedly connected, since the material of filter screen 1973 is metal, hardness Higher, impact resistance is stronger and is hardly damaged, and can be subjected to high pressure impact, help to improve the operation is stable of filtration members 197 Property and adapt to and the working environment that acutely shakes of pressurization oil cylinder.It is understood that filter screen 1973 can be steel wire filter screen 1973, same matched fixing piece 1971 is also possible to steel ring etc., and such impact resistance is stronger, and structure is more firm. Fixing piece 1971 can be connected through a screw thread, be clamped or gland-type connection is arranged in hydraulic fluid port 191.

Embodiment eight

In the technology of embodiment one, further, pressurize oil cylinder further include: spacer 57, with piston 5 away from cylinder bottom 13 One end is connected, and is set on piston rod 3, with 11 clearance fit of cylinder body.

Since piston rod 3 moves back and forth in cylinder barrel 1, when piston rod 3 stretches out cylinder barrel 1, the entire length for the oil cylinder that pressurizes It lengthens, the distance between fixing piece 1971 for the oil cylinder that pressurizes is elongated.When oil cylinder shakes, the arm of force of piston rod 3 increases, so that living The impact force that stopper rod 3 receives is bigger.For this purpose, the present embodiment is provided with spacer 57 on one end that piston 5 deviates from cylinder bottom 13, and will On the piston rod 3 that spacer 57 is arranged.Due to playing position-limiting action to spacer 57 by piston 5, with the stretching of piston rod 3, spacer The 57 side stretching in cylinder barrel 1 relative to the length direction horizontal displacement of cylinder body 11, to separate cylinder bottom 13.Added by spacer 57 The connection length of strong piston rod 3 and piston 5 enhances cylinder body 11 to the bearing length of piston rod 3, can effectively improve work in this way 3 stability of stopper rod prevents from being bent due to piston rod 3 is too long because stretching out, to improve the service life of piston rod 3.On the other hand, Spacer 57 is arranged inside oil cylinder, with 11 clearance fit of cylinder body, is not slidably connected with oil cylinder inner sidewall, because different without generating It rings.

Embodiment nine

In the technology of embodiment one, further, pressurize oil cylinder further include: hinged shaft 15, one end of hinged shaft 15 and cylinder body 11 one end far from cylinder bottom 13 are connected；Guide sleeve 17 is set on first end 31, and part is inserted into hinged shaft 15, is led It is connect to 17 one end far from cylinder bottom 13 of set with the other end of hinged shaft 15 by fastener；Support construction 171 is arranged in first end Between the lateral wall in portion 31 and the inner sidewall of guide sleeve 17；First sealing structure 173, is set in the lateral wall of first end 31 On, and be tightly connected with guide sleeve 17；Wherein, support construction 171 includes metallic supports 1711 and clamping cloth supporting element 1713, gold Belong to supporting element 1711 and clamping cloth supporting element 1713 to be arranged along 31 length direction interval of first end, the first sealing structure 173 includes First cushion seal circle 1731, the setting of the first cushion seal circle 1731 metallic supports 1711 and clamping cloth supporting element 1713 it Between.

When being shaken due to pressurization oil cylinder, piston rod 3 in reciprocating movement, stretch out cylinder body 11 part can generate it is very big inclined Carry, often piston rod 3 can generate pull, bending deformation a series of problems, such as.For this purpose, as shown in figure 5, present embodiments providing branch Support structure 171 stretches out the part of cylinder body 11 with stable plunger bar 3, reduces the shaking of piston rod 3.By being set in guide sleeve 17 Metallic supports 1711 are equipped with to combine with clamping cloth supporting element 1713,1711 structure 171 of metallic supports can play guiding role, It prevents from cylinder barrel 1 from entering in support ring with the abrasion of piston rod 3 and foreign matter cylinder body 11 or sealing ring are caused to wear, simultaneously because Metallic supports 1711 have the function of absorbing vibration, and have fabulous wearability.Simultaneously in guide sleeve 17 along first end 31 on 33 length direction of the second end, and the front end of the first cushion seal circle 1731, installation position is arranged in metallic supports 1711 It sets towards the sealing of piston rod 3 on the pressure side, in this way, the surge under high load capacity can be absorbed, completely cuts off high temperature fluid, improves close The durability of sealing, while the oil film due to caused by piston rod 3 and the raising of 17 friction surface temperature of guide sleeve can be reduced and lost Effect reduces the abrasion of the first cushion seal circle 1731.In addition, being provided with Jia Buzhi in the rear end of the first cushion seal circle 1731 Support adds cloth support both to have the function of support, can also bear side loading in the reciprocating motion of piston rod 3, avoid piston Bar 3 is directly contacted with wire sleeve, to reduce the abrasion of the two.Meanwhile the surface design of cloth being added to have small recess, for staying Liquid storage body, provides lubrication, further reduced frictional force and starting frictional force in this way, to reduce abrasion, or is conducive to improve The speed of 3 reciprocating movement of piston rod.It is understood that metallic supports 1711 and clamping cloth supporting element 1713 are located at first The two sides of cushion seal circle 1731 can effectively prevent the first cushion seal circle 1731 and be extruded in a groove, influence to seal Performance, thus help to improve the sealing reliability of the first cushion seal circle 1731.

Optionally, the material of metallic supports 1711 is PTFE+ copper powder coating, and clamping cloth supporting element 1713 is phenolic aldehyde clamping cloth, Wherein, the installation site of metallic supports 1711 is sealed towards piston rod 3 on the pressure side, in this way, due to PTFE (fluorocarbon resin) Have many advantages, such as low friction, corrosion-resistant, thermal stability, especially corrosion resistance, than common metal material or nonmetallic materials Excellent, also flexible and toughness can be absorbed under higher high load capacity by obtaining higher bearing capacity with the cooperation of copper powder coating Surge, further alleviate surge, at the same reduce piston rod 3 hermetic resistance and piston rod 3 sliding in, sealing element Heating problem.It is understood that guide sleeve 17 is fluted towards being arranged on the inner surface of piston rod 3, for limiting metal The position of supporting element 1711, clamping cloth supporting element 1713 and the first cushion seal circle 1731, and several grooves may be used interchangeably, Mounting means is simple and convenient.Due to phenolic aldehyde clamping cloth mechanical performance with higher, better wearability and corrosion-resistant can be provided Property, it can achieve long service life, save the effect of cost.

Further optionally, the first cushion seal circle 1731 is HBY sealing ring or HBTS sealing ring.Can preferably it alleviate Surge under high load capacity, while high temperature can be prevented to be transmitted to, along first end 31 to 33 length direction of the second end On other sealing rings of first cushion seal circle, 1731 rear end.Simultaneously for other sealing rings, axially making through pressure When with being extruded, sealing force can be increased on year-on-year basis with pressure, wherein can be by combining with lip-type packing, to eliminate high pressure, height The vibration of speed operation, the reliability that can be further improved sealing system have when interior travel speed is greater than outer stroke speed Good oil film pumpback ability reduces abrasion so that keeping lubricant effect.

It is understood that the embodiment of metallic supports 1711 Yu clamping cloth supporting element 1713 is present embodiments provided, when It is equipped in 57 structure of spacer on piston 5, support is each provided with to the both ends of piston rod 3, to improve piston rod 3 Stability when stretching out work, effectively reduce piston rod 3 pull, curved failure.

Further, as shown in figure 5, the first sealing structure 173 further includes 3 sealing ring 1733 of piston rod and dustband 1735, the first cushion seal circle 1731,3 sealing ring 1733 of piston rod and dustband 1735 along by piston rod 3 by the second end 33 are directed toward the direction arrangement of first end 31.

Along the direction for being directed toward first end 31 by the second end 33 by piston rod 3, the first sealing structure 173 is set gradually There are the first cushion seal circle 1731,3 sealing ring 1733 of piston rod and dustband 1735 to arrange.Wherein, 3 sealing ring 1733 of piston rod It mainly seals, further increases the sealing effect of second chamber 103, optionally, 3 sealing ring 1733 of piston rod is IUH Sealing ring is also possible to 3 sealing ring of piston rods such as IDI sealing ring, ISI sealing ring, IUH sealing ring, UPI sealing ring or V99F One or more of 1733 combination；Dustband 1735 is used to prevent external particle from entering inside oil cylinder, to avoid in piston Friction is generated between bar 3 and guide sleeve 17, causes to wear, and optionally, retaining ring 1753 is DKBZ3 framework dustproof loop 1735, DWI is anti- One of dustbands 1735 such as konisphere 1735, DKH dustband 1735, LBH dustband 1735.

Further, pressurization oil cylinder further includes second seals structure 175, and second seals structure 175 is set in guide sleeve 17 Between hinged shaft 15, second seals structure 175 includes the second cushion seal circle 1751 and retaining ring 1753.

It is provided with the second cushion seal circle 1751 between guide sleeve 17 and hinged shaft 15, can slow down in second chamber 103 Pressure while improving the leakproofness between guide sleeve 17 and hinged shaft 15 for the percussion of guide sleeve 17, avoids hydraulic oil Leakage.Wherein, the second cushion seal circle 1751 can be high-pressure buffer K08-D sealing element, and the K08-D sealing part works service life is long, The sealing function for being more suitable for rubbing in low environment, can play more preferable sealing and buffering effect, in addition in K08-D sealing element Inner seal ring is set between guide sleeve 17, selects different inner seal rings also to be suitable for broader temperature range and work and be situated between Matter extends working life, saves cost.

Pressurization oil cylinder provided by the present application is described in detail with said one specific embodiment below.

Currently, pressurization oil cylinder executes the promotion and pressurization of power head in the work of rotary drilling rig, rotary drilling rig is drilling When, very big shaking and vibration can be generated, this rolling power is transmitted to oil cylinder, will cause oil cylinder and different degrees of each germplasm occurs Amount problem, pressurization oil cylinder are especially apparent, and according to historical statistics, cylinder barrel deformation, piston rods bend occurred for the oil cylinder that pressurizes, and oil pipe is opened It splits, weld cracking, cylinder barrel is pulled, and piston rod gets rusty, a series of failures such as outer horizontal valve clamping stagnation of horizontalization, invites client to complain continuous. There are many countermeasure for solving the series of faults at present, but countermeasure not can effectively solve problem mostly, often attend to one thing and lose sight of another, and of the invention Being is the failure provided for rotary drilling rig pressurization oil cylinder, and above-mentioned failure is effectively solved from design.

For this purpose, An embodiment provides a kind of pressurization oil cylinders of high reliablity, comprising: built-in pressure reducing valve, Metal support+phenolic aldehyde clamping cloth support of built-in multiple filtration screw plug, built-in anti-slip abnormal sound spacer, built-in PTFE+ copper powder coating Combined support ring, external multiple dumbbell shapes buffering oil pipe fixed structures and external movable flexural pivot cylinder bottom.

Specific structure is as follows:

One end welding hinged shaft welds cylinder bottom, spherical connection is housed on cylinder bottom for being installed on mast, one end on cylinder barrel Head, rod chamber rodless cavity (i.e. first chamber and second chamber) is respectively welded hydraulic fluid port seat on cylinder barrel, is also welded on cylinder barrel solid Reservation.It is additionally provided with the equidistant pipe clamp seat of multiple pipes on cylinder barrel, is provided with filtration members in hydraulic fluid port seat, such as: filter core head, no bar Chamber hydraulic fluid port seat upper end is provided with oil pipe, and the resilient cushion of multiple dumbbell shape flexible materials is provided on oil pipe, is arranged above resilient cushion There is pipe clamp, pipe clamp clamping resilient cushion fixes to clamp oil pipe.It is provided with fixing seat on the outer lateral wall of cylinder barrel, is provided in fixing seat Valve seat, valve seat put down horizontal valve for external；Cylinder bottom end is provided with rotation connection head, such as: spherical anti-drop head, the setting of hinged shaft end There is screw-type guide sleeve, the first sealing structure, second seals structure and support construction are provided in guide sleeve.Wherein, first is close The group of seal structure and support construction is collectively referred to as: dynamic sealing, second seals structure are known as: static seal.Dynamic sealing is using bumper ring+outer The combination of shape circle, metal support+phenolic aldehyde clamping cloth support combination, while outside is provided with framework dustproof loop, is provided on static seal Special protecting against shock sealing+O-ring and retaining ring.Cylinder barrel is internally provided with piston rod, plunger end be provided with it is shockproof prevent it is incorgruous every Set and piston are provided with oil passage in piston: including oil-through hole, elastic component such as spring, stop part such as adjusting nut, plug Body such as seals slippery fellow, is provided with phenolic aldehyde clamping cloth support+protecting against shock combined seal ring outside piston, piston is set with piston rod junction It is equipped with seal with O ring.

Furthermore it is also possible to have a structure in which

1, cylinder bottom end is provided with spherical connector and combines with elastic washer, and spherical connector is installed on cylinder bottom using mounting plate Between, elastomeric gasket material is 60 degree of shore hardness soft rubbers.

2, oil pipe uses dumbbell character band resilient cushion open at one end, and material uses the TPEE rubber of Xiao Shi hardness 73, and It is spaced within 1 meter of length and a setting 6 altogether is set.

3, oil cylinder oil inlet and outlet installs small-sized filtering plug, and filtering plug is made of outer rim+multiple filtration steel wire, outside The settable screw thread of steel ring or the installation of gland-type structure, the settable bite type of filter screen, the structures such as gluing fastener-type.

4, oil cylinder is built-in puts down horizontal pressure reducing valve, puts down horizontal pressure reducing valve and is installed on internal piston, rod chamber is pacified respectively with rodless cavity One is filled, by hollow screw plug, spring, slide head, small sealing ring and two oil channel compositions.

5, metal support+phenolic aldehyde clamping cloth support+spacer composite structure, spacer are stuck between plunger stem flange bar, cannot slide, HBY cushion seal circle is provided between metal support and clamping cloth support.

Working principle is as follows:

Hinged shaft and cylinder bottom are welded in two sides of cylinder barrel, and hinged shaft is installed on drilling machine mast, the head of piston rod the second end side For connecting drill power head, spherical connector is installed between mounting plate and cylinder bottom portion's head, when drilling machine works, oil cylinder with Power head vibration and mast shake and shake.

When oil cylinder shakes, connector whipping impact together with the bolster such as elastic ring being mounted on drilling machine is installed on brill Tailstock on machine, then connector is close to elastic ring with swing when impact, by most of impact force from spherical connector and bullet It is laid down on property circle, to protect, oil cylinder connector is not severed and cylinder tube will not bending deformation.

5 meters of 7 length of oil pipe is how long, and left end connector is fixed on hydraulic fluid port seat, most of tubing length by multiple pipe clamp seats, Resilient cushion and pipe clamp are fixed, and when oil cylinder shakes and vibrates, do not increase the pipe clamp of resilient cushion fixed oil pipe meeting and metal tube commonly The continuous vibration friction of folder, oil pipe will crack oil leak from metal pipe clamp for a long time, increase dumbbell shape resilient cushion when this hair Afterwards, oil pipe whipping and when vibration, oil pipe and soft wear-resisting resilient cushion friction, no matter how long, oil pipe is intact.

Being installed on putting down on valve seat, horizontal valve is often stuck, and because foreign matter damages, the present invention is passing in and out oil cylinder high pressure seals It is mounted with that filtration members, such as multiple filtration screw plug, filtering screw plug are made of outer ring screw plug and steel wire filter screen in hydraulic fluid port, screw thread is twisted Cooperate into hydraulic fluid port seat, material is steel, can be subjected to high pressure impact, and when oil liquid oil inlet and outlet, oil liquid can make to flow by filtering Enter the hydraulic oil in effluent oil cylinder and keep clean, improving flow liquid cleannes, the stuck failure rate of horizontal valve is equalled in reduction simultaneously.

When oil cylinder shakes work, in-oil cylinder oil liquid is unstable, and oil liquid is run helter-skelter in cylinder, generates internal impact pressure, by In shaking be in short-term, frequency it is high, surge has just stopped or has already led to oil when being often not up to the horizontal valve of oil cylinder exterior flat Cylinder cylinder barrel magnifies deformation, and the present invention is equipped in oil cylinder internal piston puts down horizontal pressure reducing valve, this pressure reducing valve is such as empty by stop part Heart screw plug head, spring, cock body is such as foxy, and cock body sealing ring and two oil passage compositions, oil cylinder, which shakes, generates internal impact When pressure, when pressure is greater than the spring opening pressure of setting, spring-compressed, slippery fellow slides backward, when slippery fellow leaves original position, When first port or second port are opened, rod chamber and rodless cavity intercommunication pressure release, to protect oil cylinder not rushed in a short time Compression shock is hit, protection cylinder barrel will not swell deformation.

Oil cylinder shake and very big unbalance loading can be generated when stretching out pressurized operation, often piston rod can pull, bending deformation, The present invention is provided with metal support and phenolic aldehyde clamping cloth combined support in guide sleeve, is provided with cushion seal between two supports It encloses, is provided with anti-slip spacer before plunger end piston, when cylinder piston rod stretches out entirely, the support of oil cylinder is lengthened, effectively Improve piston rod stability, it is therefore prevented that piston rod because stretch out it is too long due to be bent, pull problem, and spacer is inside oil cylinder It is fixed, generation abnormal sound will not be slided.

And then pressurization oil cylinder provided by the invention has the effect that

1. cylinder bottom tail portion of the present invention uses the spherical connector of activity shape, with elastic ring composite structure, most of oil is absorbed Cylinder impact force can eliminate oil cylinder and shake tail break caused by impact, the phenomena of the failure such as cylinder barrel bending.

2. oil pipe of the present invention uses the soft wear-resistant vibration-damping pad of multiple dumbbell shapes and combines with metal pipe clamp, oil pipe vibration is reduced The oil pipe that Swing frequency and frictional force, effective solution oil pipe and pipe clamp friction generate cracks failure.

3. oil cylinder shakes impact, oil cylinder major part impact force is absorbed by cylinder tube, and the horizontal valve of exterior flat is absorbed into pressure When often after compression shock, the present invention equals horizontal valve mode using built-in decompression, and the surge that setting highest allows works as pressure When power is more than setting value, piston inner spring can be compressed, and slippery fellow slips over oil-through hole, rod chamber and the logical oil of rodless cavity and pressure release, be had Effect solves cylinder barrel because the cylinder barrel swell that surge generates deforms failure.

4. the present invention is provided with multiple filtration net between rod chamber and rodless cavity oil inlet, the cleaning of oil liquid is improved Degree, it is effective to improve cylinder seal damage and equal the stuck failure of horizontal valve.

5. improving piston rod when stretching out work entirely present invention employs metal support+phenolic aldehyde clamping cloth+spacer structure Stability, effectively reduce piston rod pull, curved failure.

In conclusion the pressure that pressurization oil cylinder provided by the invention realizes piston both ends by the way that oil passage is arranged in cylinder barrel Pressure at one end when pressure abruptly increase, can be discharged into the other end by power intercommunication, to reduce the compression shock to cylinder body, be passed through Decompressor in oil passage is set, to control the on-off of oil passage, accomplishes automatic release cylinder cylinder pressure in time The pressure of abruptly increase one end, so that rapid effective protection is provided to oil cylinder, to play the effect for extending pressurization oil cylinder service life.

In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ", The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, being also possible to can Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

In description of the invention, it is to be understood that the instructions such as term " on ", "lower", "left", "right", "front", "rear" Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched It states, rather than the device or unit of indication or suggestion meaning must have specific direction, be constructed and operated in a specific orientation, It is thus impossible to be interpreted as limitation of the present invention.

In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with Suitable mode combines.

These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification, Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of pressurization oil cylinder characterized by comprising

Cylinder barrel, including cylinder body and the cylinder bottom being connected with cylinder body；

Piston rod, including first end and the second end, the second end are inserted into the cylinder barrel, past along the cylinder barrel It brings back to life dynamic；

Piston is located in the cylinder barrel, and is set on the second end, reciprocal in the cylinder barrel with the second end Activity；

Wherein, one end of the cylinder bottom, the second end, the cylinder body and the piston towards the cylinder bottom, which is enclosed, sets out first Chamber, the piston rod, the cylinder body and the piston are enclosed away from one end of the cylinder bottom sets out second chamber, in the piston It is provided at least one decompressor, the decompressor is connected to the first chamber and the second chamber, for controlling State the on-off between first chamber and the second chamber.

2. pressurization oil cylinder according to claim 1, which is characterized in that

The decompressor includes balance pressure reducing valve, and the input end of the balance pressure reducing valve is connected to the first chamber and described the One in two chambers, the outlet end of the balance pressure reducing valve is connected to another in the first chamber and the second chamber It is a；Or,

The decompressor includes oil passage and spool chamber, the both ends of the oil passage be respectively communicated with the first chamber and The second chamber, the part spool chamber are connected with the oil passage, and movable spool is provided in the spool chamber Component, the valve hole part is by the on-off in the spool intracavity round trip sliding control oil passage, described in control On-off between first chamber and the second chamber.

3. pressurization oil cylinder according to claim 2, which is characterized in that

The valve hole part includes cock body and the elastic component that matches with the cock body, and the spool chamber includes avoiding space, institute It states cock body to move back and forth in the spool chamber, wherein the cock body enters the avoiding space and pressed under the action of oil pressure The elastic component contract to be connected the first chamber and the second chamber, and under the effect of the reseting elasticity of the elastic component from The avoiding space is opened to separate the first chamber and the second chamber.

4. pressurization oil cylinder according to claim 1, which is characterized in that

The quantity of the decompressor is two, and the input end of one of them decompressor connects the first chamber, out Mouth end connects the second chamber, and the input end of another decompressor connects the second chamber, and outlet end connects institute First chamber is stated, so that each decompressor is able to carry out unidirectional pressure release, two decompressors are able to carry out two-way Pressure release.

5. pressurization oil cylinder according to any one of claim 1 to 4, which is characterized in that further include:

Sealing element and at least one piston support ring, the sealing element are set on the lateral wall of the piston, and with the cylinder The inner sidewall of body seals cooperation, and the piston support ring is arranged between the piston and the inner sidewall of the cylinder body.

6. pressurization oil cylinder according to any one of claims 1 to 4, which is characterized in that further include: rotation connection head and buffering Part；

Wherein, at least part of groove for accommodating the rotation connection head, institute are provided on the lateral wall of the cylinder bottom It states rotation connection head to be flexibly connected with cylinder bottom, the bolster is set on the rotation connection head.

7. pressurization oil cylinder according to any one of claim 1 to 4, which is characterized in that further include:

At least one hydraulic fluid port seat, is arranged on the lateral wall of the cylinder barrel, and the hydraulic fluid port seat includes hydraulic fluid port, and the hydraulic fluid port penetrates through institute Hydraulic fluid port seat is stated, and is connected to the first chamber or the second chamber；

Oil pipe, one end of the oil pipe is connected with the hydraulic fluid port seat, and is connected to the hydraulic fluid port；

Clamping piece is arranged on the lateral wall of the cylinder barrel, for clamping the oil pipe；

Wherein, the pressurization oil cylinder further includes resilient cushion, is arranged between the clamping piece and the oil pipe, at least described in package The part clamped by the clamping piece on oil pipe；And/or filtration members, it is arranged in the hydraulic fluid port, for filtering inflow and outflow It is described pressurization oil cylinder hydraulic oil, the filtration members include at least one fixing piece and be arranged on the fixing piece at least one A filter screen, the filter screen are connected on the fixing piece.

8. pressurization oil cylinder according to any one of claim 1 to 4, which is characterized in that further include:

Spacer is connected away from one end of the cylinder bottom with the piston, and is set on the piston rod, between the cylinder body Gap cooperation.

9. pressurization oil cylinder according to any one of claim 1 to 4, which is characterized in that further include:

Hinged shaft, one end of the hinged shaft are connected with the cylinder body far from one end of the cylinder bottom；

Guide sleeve is set on the first end, and part is inserted into the hinged shaft, and the guide sleeve is far from the cylinder bottom One end connect with the other end of the hinged shaft by fastener；

Support construction is arranged between the lateral wall of the first end and the inner sidewall of the guide sleeve；

First sealing structure is set on the lateral wall of the first end, and is tightly connected with the guide sleeve；

Wherein, the support construction includes metallic supports and clamping cloth supporting element, the metallic supports and clamping cloth supporting element edge The setting of first end length direction interval, first sealing structure include the first cushion seal circle, first buffering Sealing ring is arranged between the metallic supports and clamping cloth supporting element.

10. pressurization oil cylinder according to claim 9, which is characterized in that

First sealing structure further includes piston rod seals and dustband, the first cushion seal circle, the piston rod Sealing ring and the dustband are arranged along by the piston rod by the direction that the second end is directed toward the first end； And/or

The pressurization oil cylinder further includes second seals structure, and the second seals structure is set in the guide sleeve and the hinged shaft Between, the second seals structure includes the second cushion seal circle and retaining ring.