CN103867502B - accumulator - Google Patents

Abstract

A kind of accumulator for effectively improving durability is provided,With pressure vessel,It is contained in inside container and inner space is divided into the insulating element of grease chamber and air chamber,The container has barrel,Grease chamber cover member positioned at the grease chamber side end of barrel and the air chamber cover member positioned at air chamber side end,Insulating element includes can be along the metal bellows of cylinder axial stretching,And the end cap with the liquid-tight connection of the movable end of the bellows,The movable end can be promoted so as to be moved along barrel inwall via guiding elements by end cap,Gas adjustment liquid is accommodated in air chamber,The fixing end of bellows is fluid tight to be fixedly connected on grease chamber cover member,Movable end is located between fixing end and air chamber cover member,Bellows guiding elements is clipped between the adjacent pleat wall of metal bellows and is kept apart from grease chamber by bellows,S containing below 10ppm respectively in gas adjustment liquid,P or without S,P.The part being sandwiched between end cap and barrel of bellows guiding elements contacts with gas adjustment liquid.

Description

Accumulator

Technical field

The present invention relates to a kind of accumulator that hydro-cushion, pooling feature are realized using bellows, more particularly, to It is a kind of suitable for high temperature, the high-temp liquid such as pressure, high-viscosity oil engine of boat and ship accumulator.

Background technology

On the hydraulic circuit of such as engine of boat and ship, for absorb the hydraulic pulsation that is produced because ship jolts or The hydraulic pulsation produced by the driving of hydraulic pump, can be used accumulator.

As such accumulator, the accumulator for having used bellows is there are known to.For example, as it is known that there is hair as shown in Figure 2 Motivation hydraulic circuit is with interior gas formula accumulator 100.

As shown in Fig. 2 the accumulator 100 has in the inside of the pressure vessel 102 with the grade of barrel 101：Grease chamber 103rd, the air chamber 104 of compressed gas and adjustment liquid, and the insulating element that the grease chamber 103 and air chamber 104 are separated are sealed with 120.The insulating element 120 includes the metal bellows 121 that can be stretched along the axial O of the pressure vessel 102, is arranged at the gold Category bellows 121 and the barrel 101 of the pressure vessel 102 between bellows guiding elements 122 and across the ripple Pipe guiding elements 122 is located at the bellows end cap 125 of one end of metal bellows 121.

The fixing end of the metal bellows 121（Right part in reference picture 2）Air chamber cover member 117 is fixedly connected on, it is living Moved end（Left part in reference picture 2）Can be moved with stretching for the metal bellows 121, i.e. passed through by bellows end cap 125 The bellows guiding elements 122 promotes the metal bellows 121 along the telescopic slide of the inwall of barrel 101.

Metal bellows 121 is the metal formed bellow with the u-shaped pleat wall in section（Referred to as U-shaped ripple Line pipe）.

In addition, the bellows that air chamber cover member 117 seals the barrel 101 of pressure vessel 102 fixes side.As schemed Shown in 2, the inner space surrounded by the air chamber cover member 117, the insulating element 120 including bellows end cap 125 is made For air chamber 104 is used.As one of the adjustment liquid accommodated in air chamber 104, mineral oil is used.In air chamber cover member 117 It is provided with inlet 131.By the inlet 131 to injection adjustment liquid and non-active gas, such as nitrogen, helium in air chamber 104 Gas.After gas is injected, the inlet 131 is hermetic sealed by the injection bolt 132 for having used bolt etc..

Additionally, bellows guiding elements 122 generally uses the nylon of the resins such as nylon, such as high impact properties, high intensity And be formed as c-type annular element.The longitudinal section of the annular element is L-shaped, wherein, the circumferential portion of annular element is interior with barrel 101 Wall sliding contact, and radial part is then coated to by metal bellows 121.

The slip of the inwall when bellows guiding elements 122 with the flexible of metal bellows 125 along barrel 101 When, its circumferential portion（I.e. circumferential ring）Hydraulic oil with hydraulic circuit side is contacted（This structure in such as Fig. 2 is referred to as interior gas below Formula structure）.

However, for the accumulator of above-mentioned interior gas formula structure, there is a problem of being not applied for ocean large ship.

In addition, as one of high-temp liquid, such as 150 degree or so of C heavy oil can be enumerated.More specifically, in ocean In the hydraulic circuits such as the engine of large ship, as one of high-temp liquid, such as heavy diesel fuel or heavy-bodied oil can be enumerated Deng heavy oil.Contain S, P in heavy oil.Particularly C heavy oil, wherein not only containing S, P, and does not have mobility at room temperature.For This, the C heavy oil can be warming up to 150 degree or so when in use.

At a high temperature of at this moment, due to the presence of S, P, can make to be in contact with it and be dipped in bellows guiding elements therein 122 material nylon is decomposed.Due to the deterioration of such timeliness, the disappearance of bellows guiding elements 122 will be caused, cause bellows Or bellows-welding portion is directly slided along the inwall of barrel 101, so that the problems such as causing serious abrasion.

In order to avoid above-mentioned resolution problem, seal was set between barrel 101 and bellows end cap 125 in the past, with Bellows guiding elements 122 is coated to as much as possible, so as to prevent the heavy oil from being contacted with bellows guiding elements 122.

However, as shown in Figure 2, because bellows guiding elements 122 is arranged to along the sliding contact of barrel 101, in height Under the working environments of high-temp liquid such as warm, middle pressure, high-viscosity oil, the high-temp liquids such as heavy oil from grease chamber (liquid room) side are still difficult to avoid that Glade plane space through bellows guiding elements 122 and barrel 101, and enter into metal bellows 121 and barrel Space between 101, now, bellows guiding elements 122 has still been immersed among heavy oil.Even in this way, set seal, It is still not able to effectively prevent the pyrolytic of bellows guiding elements 122.

In order to solve the problems, such as that above-mentioned interior gas formula is not applied for ocean large ship, it is considered as desirable by the inventor to use outer gas formula Structure, referring for example to bibliography 1（JP 2001-146901）.However, because bellows guiding elements therein is substantially as schemed Still contacted with grease chamber shown in 2, however it remains nylon pyrolytic is so as to influence the problem of durability.

The content of the invention

The present invention is completed to solve the above problems.Bellows guiding can be effectively improved its object is to provide one kind The accumulator of the outer gas formula structure of the durability of component.

The purpose of the present invention is realized by the following technical programs.

（1）According to the present invention, there is provided a kind of accumulator, with pressure vessel, it is contained in the inside of the pressure vessel and incites somebody to action The inner space of the pressure vessel is separated into the insulating element of liquid room and air chamber, and the pressure vessel has barrel, positioned at the cylinder The liquid room cover member of the liquid room side end in body portion and the air chamber cover member of the air chamber side end positioned at the barrel, the isolation Component includes in liquid-tight manner connecting along the metal bellows of the axial stretching of the barrel and with the movable end of the metal bellows The bellows end cap for connecing, the movable end can be moved with the bellows end cap, so that the metal bellows Axial stretching described in guiding lower edge at least one bellows guiding elements for sliding, accommodated in the air chamber by gas and The gas adjustment liquid that adjustment liquid is formed, be provided with the cover member of the liquid room for liquid from outside flow into the liquid room, from this The liquid gateway of trickle in liquid room,

The accumulator is characterised by,

The fixing end of the metal bellows is fixedly connected on liquid room cover member or fluid tight fixed fluid tightly The inwall of the barrel of the liquid room cover member side is connected to,

The movable end is located axially between the fixing end and the air chamber cover member described,

The bellows guiding elements is clipped between the adjacent pleat wall of the metal bellows, or is fixedly connected on The bellows end cap, or the movable end is fixedly connected on, so as to be kept apart from the liquid room by the metal bellows,

S, P containing below 10pp m or without S, P respectively in gas adjustment liquid, or in other words, gas adjustment S, P containing 0~10ppm respectively in liquid.

（2）According to（1）The accumulator of item, it is preferable that

The adjustment member of bottomed tube is additionally provided with, the adjustment member is located at the radially inner side of the metal bellows, its Openend is connected to liquid room cover member fluid tightly, and insertion is provided with through hole on the barrel of the adjustment member.

（3）According to（2）Accumulator described in, it is characterised in that the adjustment member is arranged at a bottom including insertion The vertical hole of wall and/or insertion are arranged at the cross-drilled hole of a perisporium as the through hole.

（4）According to（1）Extremely（3）Accumulator any one of, it is characterised in that be provided with the movable end The bellows guiding elements, the bellows guiding elements is folded in drawing between the insulating element and the barrel Portion is led to be contacted with gas adjustment liquid.

（5）According to（1）Extremely（3）Any one of accumulator, it is characterised in that the metal bellows for axially Section is in wavy bellows.

（6）According to（1) extremely（3）Accumulator any one of, it is characterised in that in the movable end, in institute State the guide portion that the bellows guiding elements is provided only between bellows end cap and the barrel.

（7）According to（1）Extremely（3）Accumulator any one of, it is characterised in that the bellows guiding elements Formed using nylon.

（8）According to（1) extremely（3）Accumulator any one of, it is characterised in that in the air chamber cover member On, it is provided with to the inlet that gas adjusts liquid is injected in the air chamber, releasably it is provided with for this to be noted in the inlet The blocking of inlet seal.

（9）According to（1）Extremely（3）Accumulator any one of, it is characterised in that the bellows end cap can With the adjustment member directly contact.

Above-mentioned technical proposal of the invention, employ bellows guiding elements with adjustment liquid contact without with liquid room in High-temp liquid contact outer gas formula design.By using the not even gas containing S, P of S, P containing below 10p p m respectively Adjustment liquid, even if so that bellows guiding elements is not contacted with the liquid in liquid room but adjusts the situation that liquid is contacted with gas Under, do not occur at the problem that nylon material under high-temperature condition is decomposed by S, P yet.On the other hand, have with interior gas formula The liquid room side of sticky high-temp liquid such as C heavy oil will ensure that the requirement of the lubricity for bellows guiding elements etc. is compared, Due to existing as liquid in air chamber side adjustment liquid, the now requirement to lubricity etc. the just height no longer as the former.Therefore, By using there is no additive（It is substantially absent from S, P）Mineral oil as adjustment liquid, can play and significantly carry The effect of the durability of bellows guiding elements high.

Meanwhile, accumulator of the invention, due to requiring nothing more than the adjustment liquid in air chamber de- S, P, this requirement can also Easily met with low process costs.

Brief description of the drawings

Fig. 1 is the sectional view of accumulator according to embodiments of the present invention, and accumulator now is in grease chamber lateral pressure State when minimum.

Fig. 2 is the sectional view of existing accumulator when showing that grease chamber lateral pressure is minimum.

Fig. 3（a）、（b）Axial sectional view and the axial direction of the adjustment member of an embodiment of the invention are respectively shown Top view.

Fig. 4（a）、（b）、（c）Respectively show the bellows guiding elements of an embodiment of the invention side view, And along line A-A, the partial sectional view of line B-B.

Specific embodiment

Describe accumulator 10 according to an embodiment of the invention in detail referring to the drawings.In the following description, make For high-temp liquid is illustrated by taking 150 degree or so of C heavy oil as an example, but the present invention is not limited to 150 degree or so of C heavy oil. Correspondingly, liquid room is also referred to as grease chamber in the following description.

The accumulator 10 is used to absorb the hydraulic circuit 30 in such as engine of boat and ship（Hydraulic pressure is only symbolically shown in figure The part pipeline being connected with grease chamber 3 in loop）On the hydro pulse that occurs, or for accumulating pressure.

The pressure vessel 2 of the accumulator 10 includes：Metal cylindric barrel 1, the cylinder is for example welded in liquid-tight manner One side in body portion 1（Air chamber side）Metal air chamber cover member 17 and be for example welded in the another of the barrel 1 in liquid-tight manner One side（Grease chamber side）Metal grease chamber cover member 18.Pressure vessel 2 have be resistant to act on the accumulator 10 Use pressure rigidity.

The accumulator 10 has in the inside of pressure vessel 2：Grease chamber 3, the air chamber 4 for being sealed with compressed gas and adjustment liquid, And the insulating element 20 for separating the grease chamber 3 and air chamber 4.

The insulating element 20 includes the metal wave that can be stretched along the axial O that the axial O of the pressure vessel 2 is barrel 1 Line pipe 21 and be connected directly or indirectly in liquid-tight manner metal bellows 21 one end movable end i.e. described later bellows end cap 25。

As shown in fig. 1, O is formed with multiple pleat walls 28, the longitudinal section of pleat wall 28 to metal bellows 21 vertically（I.e. along axle To section）Be formed as waveform or the S fonts for skewing.

As shown in fig. 1, the grease chamber side left part of metal bellows 21, i.e. fixing end 27, such as liquid-tight by welding Property it is fixedly connected on first fixed part 23 relative with the left part of the metal bellows 21 of grease chamber cover member 18.As A kind of variation, it is also possible to be fixedly connected on the internal perisporium of barrel 1 fluid tightly.O is arranged metal bellows 21 vertically. The air chamber side right part of metal bellows 21, i.e. movable end 26, it is directly or indirect via bellows guiding elements 22 described later Ground has for example been welded to connect bellows end cap 125 in fluid-tight mode.

In this way, metal bellows 21 be configured to from the fixing end 27 to the direction of movable end 26 with from grease chamber cover member 18 Direction to air chamber cover member 17 is consistent, i.e., the movable end 26 of the metal bellows 21 is located at the He of fixing end 27 on axial O Midway between air chamber cover member 17.

Additionally, between metal bellows 21 and barrel 1, one or more bellows guiding elements 22 can be folded with. The bellows guiding elements 22 is formed by small synthetic resin of coefficient of friction etc., for example, the resins such as nylon described later typically can be used And be formed as c-type annular element.The longitudinal section of the annular element is L-shaped, i.e., as shown in fig. 1, including circumferential portion 22a（Equivalent to Guide portion of the invention）With radial part 22b, wherein, circumferential portion 22a is the internal perisporium of peripheral part and the barrel 1 of annular element Face sliding contact so that metal bellows 21 can successfully stretch O vertically, and radial part 22b then can for example be fastened in Between the adjacent two pleat wall 28,28 of metal bellows 21, so as to grease chamber 3 keep apart without with grease chamber 3 in heavy oil Contact.Now, while radial part 22b is coated to by metal bellows 21, bellows end cap 25 is fixedly connected on movable end 26。

However, the present invention is not limited thereto.Used as a variation, bellows guiding elements 22 also can be via its radial part 22b is directly fixedly connected on bellows end cap 25, or is directly fixedly connected on movable end 26, as long as it can be made from liquid room 3 It is effectively isolated out.

As above, insulating element 20 is constituted by metal bellows 21 and bellows end cap 25, and bellows guiding elements 22 To the insulating element 20, guiding function is played in the telescopic moving of O vertically on the inside of barrel 1.

As shown in figure 1, also bottomed tube can be set in the inner side of insulating element 20（Or teacup shape）Adjustment member 35.The tune The openend of whole component 35 fluid tight right side for being fixedly connected on grease chamber cover member 18 for example by welding with the opening The second relative fixed part 24 of end.Second fixed part 24 is formed as being stretched out to the right from the first fixed part 23 as shown in fig. 1 Jut, but first fixed part 23, the second fixed part 24 can also simultaneously be formed as the right side of grease chamber cover member 18 One form of planar portions, now will no longer have that the jut stretched out to the right from the planar portions.

As shown in fig. 1, surrounded and formed by grease chamber cover member 18, barrel 1, bellows end cap 25 and adjustment member 35 The arrangement space of metal bellows 21.

Bellows guiding elements 22 can set one or more according to the use length of metal bellows 21.Positioned at isolation The free end of component 20, i.e. although the radial part 22b of the bellows guiding elements 22 of the movable end of metal bellows 21 can be by The institute of adjacent pleat wall 28,28 of metal bellows 21 is sandwiched, coated, but its circumferential portion 22a it is then not coated but from wavy metal Pipe 21 is stretched out so as to extend to air chamber side, to be folded in barrel 1 and insulating element 20（Such as bellows end cap 25 and/or gold Category bellows 21）State can along barrel 1 inwall slide.

Thus, the bellows guiding elements 22 positioned at movable end 26 is configured to the adjustment liquid in its circumferential portion 22a and air chamber 4 Contact.

More specifically, such as Fig. 4（a）、（b）、（c）Shown in, bellows guiding elements 22 is generally formed as in circumference The upper c-type annular element with openend.Such as Fig. 4（b）In line A-A sectional view shown in, the radial part 22b of the annular element can be with shape As with the taper gradually thinning towards inner circumferential side, and be preferably formed with the top of ring inner circumferential side rounding in order to Smoothly abutted with metal bellows 21.On the other hand, circumferential portion 22a is not necessarily to be formed at the whole circumference of annular element On, can be such as Fig. 4（a）In be spaced to turn up the soil in the circumferential and stretched out to axes O direction from the circumferential edges of annular element, so as to be formed It is such as Fig. 4（c）Shown in multiple circumferential portion 22a.

In an embodiment of the present invention, it is preferable that S, P containing below 10ppm respectively in the gas that is used adjustment liquid, Do not contain S, P even.

Because the S in gas adjustment liquid, P content are little even without even if the bellows positioned at movable end 26 guides structure Part 22 is contacted with the adjustment liquid in air chamber 4, and the nylon as in interior gas formula structure in prior art such as Fig. 2 will not also occur Because of the problem of S, P pyrolytic, so as to significantly improve the service life of bellows guiding elements.

Simultaneously as be mainly in the adjustment liquid that the side of air chamber 4 includes gas existing with liquid, can easily expire The requirement to lubricity etc. of sufficient bellows guiding elements 22.

Therefore, as adjustment liquid, can play and significantly improve ripple by using there is no the mineral oil of the additives such as S, P The effect of the durability of line pipe guiding elements.

On the other hand, due to the adjustment liquid in air chamber 4 S, P containing below 10pp m respectively, do not allow containing S, P even The pyrolytic of bellows guiding elements 22 can be easily caused, in this case, even if adjustment liquid passes through movable end from the side of air chamber 4 Glade plane space between 26 bellows guiding elements 22 and barrel 1, and enter between metal bellows 21 and barrel 1 Space, also will not to metal bellows 21 extend way in other bellows guiding elements 22 adversely affect.Therefore, only The bellows guiding elements 22 positioned at movable end 26, matching somebody with somebody between barrel 1 and metal bellows 21 can be suitably designed Conjunction relation, it is not necessary to still further add the seal as in interior gas formula.Thus, reduction accessory has also been reached and has further subtracted Man-hour, cost and other effects are assembled less.

In Fig. 1, the right side of insulating element 20 is the space on the right side of bellows end cap 25 as air chamber 4.As in air chamber 4 One of the adjustment liquid of receiving, uses mineral oil.As in the air chamber 4 with the nonactive gas of the pressure seal of superatmospheric Body, for example, can use helium or nitrogen.The gas is logical by gas by being arranged at the valve bolt 32 of air chamber cover member 17 Road 31（Equivalent to inlet of the invention）And be supplied in the adjustment oil being pre-charged with air chamber 4.After gas has been supplied, make With valve bolt 32（Equivalent to blocking of the invention）Hermetic closed Deng by gas passage 31.

State shown in Fig. 1, show the side of grease chamber 3 pressure is minimum or position of bellows end cap 25 when being zero and The compression retracted mode of metal bellows 21.

When there is pulsation in pressure in hydraulic circuit 30, such as side pressure rise of grease chamber 3, then the side of grease chamber 3 is higher Pressure acts on bellows end cap 25 and moves it, and O extends movement to the side of air chamber 4 vertically to drive metal bellows 21, together When, metal bellows 21 promotes bellows guiding elements 22 to be slided along the internal perisporium of barrel 1.

Additionally, as described above, in the inside of grease chamber 3, can be set has adjustment member 35, to prevent metal bellows 21 by gas The pressure conquassation of room to allow compress length below.For example it is pressed that to be compressed to each pleat wall 28 snugly into each other in metal bellows 21 State when or before this state, bellows end cap 25 can be with the bottom surface of adjustment member 35（Right lateral surface portion in Fig. 1）Contact, That is, bellows end cap 25 and the directly contact of adjustment member 35, so as to avoid metal bellows 21 by conquassation.

Adjustment member 35 can be fixedly connected on grease chamber end cap structure as cylinder-like part by appropriate modes such as welding The grease chamber side inwall of part 18 or barrel 1.The material of the adjustment member 35 is not only restricted to metal, as long as it can be in grease chamber 3 Durability ground is played as solid members and prevents metal bellows under the working environments of high-temp liquid such as high temperature, middle pressure, high-viscosity oil 21 are excessively stressed, it would however also be possible to employ appropriate synthetic resin body or elastomer etc..

Through hole is provided with the wall of the adjustment member 35, so as to must can pass through from the heavy oil of the side of grease chamber 3 The through hole and reach the side of bellows end cap 25 so as to applying pressure to it.

Specifically, such as Fig. 3（a）、（b）Shown, the through hole can be disposed on the cylinder wall of the adjustment member 35 Through hole 33（Also known as cross-drilled hole）, it is also possible to it is disposed on the through hole 34 on the wall surface of the adjustment member 35（Also known as indulge Hole）.The through hole 33,34 can simultaneously set and may also set up multiple.

The operating principle of the accumulator 10 when illustrating to be provided with adjustment member 35 referring to Fig. 1.

In hydraulic circuit 30 pressure occur pulsation when, such as side pressure rise of grease chamber 3 and be more than the lateral pressure of air chamber 4 one When, then the side of grease chamber 3 pressure higher heavy oil is forced through the through hole 33,34 and reach the inwall side of metal bellows 21 and The left side of bellows end cap 25, so as to action of hydraulic force in bellows end cap 25, is driven metal bellows 21 vertically O to gas The side elongation strain of room 4 and moved together with bellows end cap 25, meanwhile, metal bellows 21 promotes bellows guiding elements 22 Slided along barrel 1.Correspondingly, the pressure rise of the side of air chamber 4, until obtaining balance with the lateral pressure of grease chamber 3 one.

On the other hand, when the lateral pressure of grease chamber 3 one becomes lower than the lateral pressure of air chamber 4 one, then elevated pressures of the side of air chamber 4 Act on bellows end cap 25, drive metal bellows 21 vertically O to the side compression of grease chamber 3 with bellows end cap 25 Move together, meanwhile, metal bellows 21 or bellows end cap 25 promote bellows guiding elements 22 to be slided along barrel 1.Phase Ying Di, the pressure rise of the side of grease chamber 3, until obtaining balance with the lateral pressure of air chamber 4 one.

Thus, by this gas spring formula act on, pressure can be accumulated and make hydraulic pressure ripple component smooth, equilibrium Change.

In addition, when above-mentioned accumulator works because of pulsation, the compressed gas in the side of air chamber 4 are dissolved in adjustment liquid Amount also has corresponding change.Configuration on gas and adjustment liquid no longer gives herein not as substance of the invention Describe in detail.

As above, regardless of whether setting adjustment member 35, the heavy oil of the side of grease chamber 3 all with the inwall side joint of metal bellows 21 Touch, but, it is located at its outer wall because the metal bellows 21 is partly coated to for example with S fonts or wavy pleat wall 28 The bellows guiding elements 22 of side and it is kept apart with heavy oil, so as to bellows guiding elements 22 will not occur because of institute in heavy oil S, P for inevitably including and the problem decomposed at high temperature.

As above, according to embodiments of the present invention, the pyrolytic problem of bellows guiding elements 22 is efficiently solved, thus The material requirements to bellows guiding elements 22 can be significantly reduced.For example, as nylon can use nylon66 fiber, nylon 46 or Nylon 6 etc..For example, the heat distortion temperature of non-reinforcing type nylon 46 is 160 degree, and the plastic material of reinforced nylon 46 is 290 degree, and long-term use temperature is 163 degree.The nylon 46 can keep high rigidity at high temperature, with excellent wearability, And surface is smooth firm, so that bellows guiding elements 22 of the invention can be applied to as preferable sliding material.

In the above-described embodiments, by grease chamber cover member 18, insulating element 20 surrounds the space for being formed makes as grease chamber 3 With.In the state of hydraulic oil lateral pressure as shown in Figure 1 is for minimum or zero, it is understood that be by grease chamber cover member 18, Insulating element 20 and adjustment member 35 are surrounded the space for being formed and are used as grease chamber 3.

Additionally, in the present embodiment, by between grease chamber 3 and air chamber 4, not being provided only with comprising bellows end cap 25 Insulating element 20, is also provided with the adjustment member 35 with through hole 33,34, so that when being pulsed in hydraulic circuit 30, can The combination of through hole 33,34 is effectively utilized to realize to high viscosity liquid（Heavy oil）Damping, effectiveness in vibration suppression, improve pressure buffer Performance.

In the example depicted in figure 1, while there is provided through hole 33,34, but, the present invention is not limited to this.For example The through hole such as through hole 34 of a side can be not provided with, and the through hole of the opposing party is only set.Now, high viscosity can also be effectively ensured that Liquid stabilising ground transmission pressure pulse.

Wherein, in the case where adjustment member 35 is provided only with through hole 34 as vertical hole without setting through hole 33, It is contemplated that automatic-sealed part is set between the wall surface and bellows end cap 25 of adjustment member 35, around the ground of through hole 34.Such as This, when grease chamber side is changed into decompression state, metal bellows 21 is pressed towards grease chamber side and deforms.Due to around through hole 34 Automatic-sealed part is provided with, then causes bellows end cap 25 to be pushed by the adjustment liquid in air chamber 4 and final when grease chamber side is depressurized Automatic-sealed part is touched, is compressed it and thereby in close contact therewith, now, automatic-sealed part is to adjustment member 35 and metal wave Pressure ground buffer action is played between the inner side of line pipe 21 such that it is able to prevent metal bellows 21 from deforming to inner side.

However, according to the abovementioned embodiments of the present invention, preferably directly being connect with adjustment member 35 by bellows end cap 25 Touching can avoid metal bellows 21 by conquassation, thus also have and reduce part count, the effect of reduces cost.

The present invention has been described in detail based on specific embodiment above, but the present invention is not limited thereto.For For those skilled in the art, it is also possible to which not departing from carries out various changes in the range of the claims in the present invention and its thought More, amendment etc..

Claims (10)

1. a kind of accumulator, with pressure vessel (2), is contained in the inside of the pressure vessel (2) and by the pressure vessel (2) Inner space is separated into the insulating element (20) of liquid room (3) and air chamber (4), the pressure vessel (2) with barrel (1), be located at Liquid room cover member (18) of the liquid room side end of the barrel (1) and the air chamber of the air chamber side end positioned at the barrel (1) Cover member (17), the insulating element (20) is including can be along the flexible metal bellows in the axial direction (O) of the barrel (1) (21) the bellows end cap (25) and with the movable end (26) of the metal bellows (21) being connected in liquid-tight manner, the movable end (26) can be moved with the bellows end cap (25), so that the metal bellows (21) is at least for sliding Axially (O) stretches described in the guiding lower edge of individual bellows guiding elements (22), is accommodated by gas and adjustment in the air chamber (4) The gas adjustment liquid that liquid is formed, be provided with liquid room cover member (18) for liquid from outside flow into the liquid room (3), from The liquid gateway (30) of liquid room (3) the interior trickle,

The accumulator is characterised by,

The fixing end (27) of the metal bellows (21) is fixedly connected on liquid room cover member (18) or liquid-tight fluid tightly The inwall of the barrel (1) of liquid room cover member (18) side is fixedly connected on to property,

The movable end (26) be located on the axial direction (O) fixing end (27) and the air chamber cover member (17) it Between,

The bellows guiding elements (22) is clipped between the adjacent pleat wall of the metal bellows (21), or fixed company The bellows end cap (25) is connected to, or is fixedly connected on the movable end (26) so that the bellows guiding elements (22) kept apart from the liquid room (3) by the metal bellows (21),

Sulphur (S), phosphorus (P) in gas adjustment liquid respectively containing below 10ppm, or not sulfur-bearing (S), phosphorus (P),

The liquid is the C heavy oil being heated, and the gas adjustment liquid is mineral oil.

2. accumulator according to claim 1, it is characterised in that

The adjustment member (35) of bottomed tube is additionally provided with, radial direction of the adjustment member (35) positioned at the metal bellows (21) Inner side, its openend is connected to liquid room cover member (18) fluid tightly, the insertion on the barrel of the adjustment member (35) It is provided with through hole.

3. accumulator according to claim 2, it is characterised in that

The adjustment member (35) is arranged at the vertical hole (34) of a bottom wall including insertion and/or insertion is arranged at the cross-drilled hole of a perisporium (33) as the through hole.

4. accumulator according to any one of claim 1 to 3, it is characterised in that

The movable end (26) is provided with the bellows guiding elements (22), the bellows guiding elements (22) it is sandwiched Guide portion (22a) between the insulating element (20) and the barrel (1) is contacted with gas adjustment liquid.

5. accumulator according to any one of claim 1 to 3, it is characterised in that the metal bellows (21) is axle It is in wavy bellows to section.

6. accumulator according to any one of claim 1 to 3, it is characterised in that in the movable end (26), described The guide portion (22a) of the bellows guiding elements (22) is provided only between bellows end cap (25) and the barrel (1).

7. accumulator according to any one of claim 1 to 3, it is characterised in that the bellows guiding elements (22) Formed using nylon.

8. accumulator according to any one of claim 1 to 3, it is characterised in that in the air chamber cover member (17) On, the inlet (31) that liquid is adjusted to injection gas in the air chamber (4) is provided with, releasably it is provided with the inlet (31) For the blocking (32) for sealing the inlet (31).

9. accumulator according to any one of claim 1 to 3, it is characterised in that the bellows end cap (25) can With the adjustment member (35) directly contact.

10. accumulator according to claim 4, it is characterised in that the guide portion along the barrel inner circumferential wall Slide, the guide portion is formed with multiple in the mode circumferentially spaced apart from one another in the bellows guiding elements.