JPH08121402A - Accumulator - Google Patents
AccumulatorInfo
- Publication number
- JPH08121402A JPH08121402A JP6256794A JP25679494A JPH08121402A JP H08121402 A JPH08121402 A JP H08121402A JP 6256794 A JP6256794 A JP 6256794A JP 25679494 A JP25679494 A JP 25679494A JP H08121402 A JPH08121402 A JP H08121402A
- Authority
- JP
- Japan
- Prior art keywords
- bellows
- shell
- chamber
- length
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000000638 solvent extraction Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 30
- 239000007789 gas Substances 0.000 description 22
- 230000008602 contraction Effects 0.000 description 9
- 230000010349 pulsation Effects 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 6
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011800 void material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
- F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/20—Accumulator cushioning means
- F15B2201/205—Accumulator cushioning means using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3155—Accumulator separating means having flexible separating means characterised by the material of the flexible separating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/40—Constructional details of accumulators not otherwise provided for
- F15B2201/41—Liquid ports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/40—Constructional details of accumulators not otherwise provided for
- F15B2201/415—Gas ports
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明はアキュムレータのブラ
ダに関し、特に、ベローズ型ブラダにおいて異常な伸縮
を防止するアキュムレータに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accumulator bladder, and more particularly to an accumulator which prevents abnormal expansion and contraction in a bellows type bladder.
【０００２】[0002]
【従来技術およびその問題点】従来、油圧や水圧の脈動
等を吸収するために用いられるアキュムレータにあって
は、種々のタイプのものが提案されており、例えば、図
５に示すようなものが既に知られている。2. Description of the Related Art Conventionally, various types of accumulators used to absorb pulsations of hydraulic pressure and water pressure have been proposed, and for example, the one shown in FIG. Already known.
【０００３】すなわち、このアキュムレータは、所謂ブ
ラダ型アキュムレータの一種であって、内部に空室２４
を有する一端が閉塞された筒状をなすシェル２１と、こ
のシェル２１の開口部に装着されるとともに、中心部に
シェル２１内外を連通するポート３１を有する略円板状
のポート部材２２と、このポート部材２２の周面とシェ
ル２１の内面との間に装着される環状のスペーサ２６
と、シェル２１の空室２４内に設けられるとともに、開
口周縁部がポート部材２２とスペーサ２６との間で挟持
固定され、かつ、シェル２１の空室２４内を密閉された
気体室３０とポート３１に通じる作動室２８とに区画す
る、一端が閉塞された蛇腹状をなす樹脂製のベローズ２
５とを具えたものであって、気体室３０には窒素や空気
等の気体が封入され、作動室２８にはポート部材２２の
ポート３１を介して水、油等の作動流体が作用するよう
になっている。That is, this accumulator is a kind of so-called bladder type accumulator, and has an empty space 24 inside.
A cylindrical shell 21 having one end closed and a substantially disk-shaped port member 22 that is attached to the opening of the shell 21 and that has a port 31 that communicates the inside and outside of the shell 21 at the center. An annular spacer 26 mounted between the peripheral surface of the port member 22 and the inner surface of the shell 21.
A gas chamber 30 and a port which are provided in the empty chamber 24 of the shell 21, the opening peripheral portion of which is sandwiched and fixed between the port member 22 and the spacer 26, and which closes the empty chamber 24 of the shell 21. A bellows-shaped resin bellows 2 which is divided into a working chamber 28 communicating with 31 and which is closed at one end and has a bellows shape.
5, the gas chamber 30 is filled with a gas such as nitrogen or air, and the working chamber 28 is acted upon by a working fluid such as water or oil via the port 31 of the port member 22. It has become.
【０００４】そして、上記のように構成されるアキュム
レータを水圧、油圧等の作動流体が作用するラインに接
続すると、ライン内を流れる作動流体がポート部材２２
のポート３１を介してベローズ２５の作動室２８内に流
入し、作動流体の圧力によってベローズ２５が伸長変形
するとともに、ベローズ２５の伸長変形に追従して気体
室３０の容積が縮小され、気体室３０の圧力と作動室２
８の圧力が等しくなった時点で作動流体の作動室２８へ
の流入が停止する。When the accumulator configured as described above is connected to a line on which a working fluid such as water pressure or hydraulic pressure acts, the working fluid flowing in the line is connected to the port member 22.
Flow into the working chamber 28 of the bellows 25 through the port 31 of the bellows 25, and the bellows 25 expands and deforms due to the pressure of the working fluid. 30 pressure and working chamber 2
When the pressures of 8 become equal, the flow of the working fluid into the working chamber 28 stops.
【０００５】この状態からライン内を流れる作動流体の
圧力が低下すると、気体室３０の圧力と作動室２８の圧
力との平衡状態が壊れ、気体室３０の圧力によりベロー
ズ２５が押圧されて縮小変形するとともに、ベローズ２
５の縮小変形に追従して作動室２８内の作動流体がポー
ト部材２２のポート３１を介してライン内へ押し出さ
れ、気体室３０の圧力と作動室２８の圧力が等しくなっ
た時点で作動流体の作動室２８からの流出が停止する。When the pressure of the working fluid flowing in the line is lowered from this state, the equilibrium state between the pressure in the gas chamber 30 and the pressure in the working chamber 28 is broken, and the bellows 25 is pressed by the pressure in the gas chamber 30 to be contracted and deformed. And bellows 2
The working fluid in the working chamber 28 is pushed out into the line through the port 31 of the port member 22 following the contraction deformation of No. 5, and when the pressure of the gas chamber 30 and the pressure of the working chamber 28 become equal, Outflow from the working chamber 28 of the.
【０００６】このような作動流体のラインから作動室２
８への流入、作動室２８からラインへの流出が繰り返し
行われることにより、ライン内を流れる作動流体の脈動
等が吸収されるようになっている。From such a working fluid line to the working chamber 2
By repeating the inflow into the line 8 and the outflow from the working chamber 28 to the line, the pulsation of the working fluid flowing in the line is absorbed.
【０００７】しかしながら、上記のように構成される従
来のアキュムレータにあっては、シェル２１の空室２４
の長さｌがベローズ２５の自然長時の長さｈよりも長く
形成されているため、作動流体の最大流入時にベローズ
２５は自然長よりも長く伸ばされることになり、そのた
め山部、谷部に許容応力を超える過大な応力が作用し、
このようなことが繰り返し行われることにより耐久性が
著しく低下してしまう。この場合、シェル２１の空室２
４の長さｌをベローズ２５の自然長時の長さｈよりも短
くすることは容易であるが、その場合には作動室２８の
容積が小さくなるため、脈動等の吸収能力が著しく低下
することになる。However, in the conventional accumulator constructed as described above, the empty chamber 24 of the shell 21 is
Since the length l of the bellows 25 is formed longer than the natural length h of the bellows 25, the bellows 25 is extended longer than the natural length at the maximum inflow of the working fluid. Excessive stress exceeding the allowable stress acts on the
By repeating such a process, the durability is significantly reduced. In this case, the empty room 2 of the shell 21
It is easy to make the length l of 4 shorter than the length h of the bellows 25 when it is naturally long, but in that case, since the volume of the working chamber 28 becomes small, the absorption capacity for pulsation or the like is significantly reduced. It will be.
【０００８】この発明は前記のような従来のもののもつ
問題点を解決したものであって、シェルの空室の長さを
ベローズの自然長時の長さに近似させることにより、作
動流体の最大流入時にベローズが自然長よりも長く伸長
変形するのを防止し、これにより耐久性を大幅に向上さ
せることができるアキュムレータを提供することを目的
とするものである。The present invention solves the above-mentioned problems of the conventional ones. By approximating the length of the empty space of the shell to the length of the bellows at the natural length, the maximum working fluid is increased. An object of the present invention is to provide an accumulator capable of preventing the bellows from being stretched and deformed longer than its natural length at the time of inflow, thereby significantly improving durability.
【０００９】[0009]
【問題点を解決するための手段】上記の問題点を解決す
るためにこの発明は、内部に空室を有するとともに前記
空室に連通するポートを有するシェル及び前記シェルの
ポートを囲んで密封に取り付けられる開口部を有すると
ともに前記空室を前記ポート側の作動室と気体室とに区
画するベローズを具備し、前記シェルの空室を形成する
内周面は前記ベローズの外周面に近接する大きさを有す
るとともに前記ベローズの頂部と対向する天井部はベロ
ーズの自然長に略近似する長さに位置する手段を採用し
たものである。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a shell having a void inside and a port having a port communicating with the void, and enclosing the port of the shell for sealing. A bellows having an opening to be attached and partitioning the empty chamber into a working chamber on the port side and a gas chamber, and the inner peripheral surface forming the empty chamber of the shell is close to the outer peripheral surface of the bellows. The ceiling portion, which has a height and faces the top portion of the bellows, is located at a length approximately close to the natural length of the bellows.
【００１０】[0010]
【作用】この発明は前記のような手段を採用したことに
より、シェルの空室の長さはベローズの自然長の長さに
近似する長さとなる。したがって、作動流体の最大流入
時において、ベローズが自然長よりも長く伸長すること
はなく、ベローズの過大伸長による破損が防止されるこ
とになる。According to the present invention, by adopting the above-mentioned means, the length of the empty space of the shell becomes a length close to the natural length of the bellows. Therefore, at the maximum inflow of the working fluid, the bellows does not extend longer than the natural length, and damage due to excessive extension of the bellows is prevented.
【００１１】[0011]
【実施例】以下、図面に示すこの発明の実施例について
説明する。図１および図２には、この発明によるアキュ
ムレータの第１の実施例が示されていて、図１は作動流
体の最大流入時の状態を示す縦断面図、図２は作動流体
の最大流出時の状態を示す縦断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below. 1 and 2 show a first embodiment of an accumulator according to the present invention. FIG. 1 is a longitudinal sectional view showing a state when the working fluid is maximally flowing in, and FIG. 2 is a time when the working fluid is maximally flowing out. It is a longitudinal cross-sectional view showing the state.
【００１２】すなわち、この実施例に示すアキュムレー
タは、所謂ブラダ型アキュムレータの一種であって、内
部に空室４を有する一端が閉塞された筒状をなすシェル
１と、このシェル１の開口部に装着されるとともに、中
心部にシェル１内外を連通するポート１１を有する略円
板状のポート部材２と、このポート部材２の周面とシェ
ル１の内面との間に設けられる環状のスペーサ６と、シ
ェル１の空室４内に設けられるとともに、開口周縁部が
スペーサ６とポート部材２との間で挟持固定され、か
つ、シェル１の空室４内を密閉された気体室１０とポー
ト１１に通じる作動室８とに区画する、一端が閉塞され
た蛇腹状をなす樹脂製のベローズ５とを具えている。That is, the accumulator shown in this embodiment is a kind of so-called bladder type accumulator, and has a cylindrical shell 1 having an empty chamber 4 inside and one end closed, and an opening portion of the shell 1. A substantially disk-shaped port member 2 that is mounted and has a port 11 that communicates the inside and outside of the shell 1 at the center, and an annular spacer 6 provided between the peripheral surface of the port member 2 and the inner surface of the shell 1. And a gas chamber 10 and a port which are provided in the empty chamber 4 of the shell 1 and whose peripheral edge portion is sandwiched and fixed between the spacer 6 and the port member 2 and which is sealed in the empty chamber 4 of the shell 1. It is provided with a bellows-shaped resin bellows 5 which is divided into a working chamber 8 communicating with 11 and which is closed at one end.
【００１３】ベローズ５は、気体を透過するのを防止す
るとともに、作動流体（液体）がベローズ５内に浸透し
てベローズ５に含有する可逆剤が流出し、可撓性が悪化
するのを防止するため、気体不透過性膜と液体浸透防止
膜とを接着により積層して形成されている。又は、ゴム
と樹脂材製層を一体にして形成してもよく、樹脂材単体
で形成してもよい。このような弾性力に多少欠点を有す
るベローズ５は自然長以上又は極端な折曲げ以下に伸縮
されると、耐久性が急速に低下するものである。The bellows 5 prevents gas from permeating, and prevents the working fluid (liquid) from penetrating into the bellows 5 to flow out the reversible agent contained in the bellows 5 and deteriorate flexibility. For this reason, the gas impermeable film and the liquid permeation preventive film are laminated by adhesion. Alternatively, the rubber and the resin material layer may be integrally formed, or may be formed of the resin material alone. The bellows 5, which has some drawbacks in its elastic force, rapidly deteriorates in durability when expanded or contracted beyond its natural length or below its extreme bending.
【００１４】そこで、この実施例では、シェル１の空室
４の長さｌを、ベローズ５の自然長時の長さｈに近似す
るように設定している。なお、この実施例では、ベロー
ズ５の自然長時に、ベローズ５の頂部５ａがシェル１の
天井部１ａに当接するようにシェル１の空室４の長さｌ
を設定している（ｌ−ｈ＝−５〜＋２０ｃｍ）が、好ま
しくは、シェル１の空室４の長さｌがベローズ５の自然
長時の長さｈに対して０〜１０ｃｍ以内となれば更によ
いものである。Therefore, in this embodiment, the length 1 of the empty chamber 4 of the shell 1 is set so as to approximate the length h of the bellows 5 when the bellows 5 has a natural length. In this embodiment, the length 1 of the vacant chamber 4 of the shell 1 is such that the top portion 5a of the bellows 5 contacts the ceiling portion 1a of the shell 1 when the bellows 5 naturally extends.
Is set (l−h = −5 to +20 cm), but preferably the length 1 of the vacant chamber 4 of the shell 1 is within 0 to 10 cm with respect to the length h of the bellows 5 when it is a natural length. It would be even better.
【００１５】ポート部材２の上端部には図中上方に突出
するベローズ５の内径よりも小径の突部２ａが一体に設
けられ、この突部２ａの上面側にベローズ５の頂部５ａ
が当接することで、ベローズ５の過大な縮小変形が阻止
されるものである。A projecting portion 2a having a diameter smaller than the inner diameter of the bellows 5 projecting upward in the drawing is integrally provided on the upper end portion of the port member 2, and the top portion 5a of the bellows 5 is provided on the upper surface side of the projecting portion 2a.
The contact between the two prevents the bellows 5 from being excessively reduced and deformed.
【００１６】ポート部材２のポート１１の入口側には適
宜のねじ部２ｂが螺設されていて、このねじ部２ｂを介
することにより脈動等を吸収しようとするライン等に接
続されるものである。An appropriate threaded portion 2b is screwed on the inlet side of the port 11 of the port member 2 and is connected to a line or the like which is intended to absorb pulsation and the like through the threaded portion 2b. .
【００１７】なお、１２はポート部材２とベローズ５と
の間をシールするＯリング、１３はポート部材２とシェ
ル１との間をシールするＯリング、１４はスペーサ６と
シェル１との間をシールするＯリングである。In addition, 12 is an O-ring for sealing between the port member 2 and the bellows 5, 13 is an O-ring for sealing between the port member 2 and the shell 1, and 14 is between the spacer 6 and the shell 1. It is an O-ring that seals.
【００１８】次に、前記に示すものの作用について説明
する。まず、上記のように構成したアキュムレータをポ
ート部材２のねじ部２ｂを介して水圧、油圧の脈動等を
吸収しようとするラインに接続すると、ライン内を流れ
る作動流体がポート部材２のポート１１を介してベロー
ズ５の作動室８内に流入し、ベローズ５が伸長変形する
とともに、ベローズ５の伸長変形に追従して気体室１０
の容積が縮小され、気体室１０の圧力と作動室８の圧力
とが等しくなった時点で作動流体の作動室８への流入が
停止する。Next, the operation of the above will be described. First, when the accumulator configured as described above is connected to a line that is going to absorb water pressure, pulsation of hydraulic pressure, etc., via the threaded portion 2b of the port member 2, the working fluid flowing in the line causes the port 11 of the port member 2 to flow. Flow into the working chamber 8 of the bellows 5 and the bellows 5 expands and deforms.
When the pressure of the gas chamber 10 becomes equal to the pressure of the working chamber 8, the flow of the working fluid into the working chamber 8 is stopped.
【００１９】そして、この状態からライン内を流れる作
動流体の圧力が低下すると、気体室１０の圧力と作動室
８の圧力との平衡状態が壊れ、気体室１０の圧力によっ
てベローズ５が縮小変形するとともに、ベローズ５の縮
小変形に追従して作動室８内の作動流体がポート部材２
のポート１１を介してライン内に押し出され、気体室１
０の圧力と作動室８の圧力とが等しくなった時点で作動
室８からラインへの作動流体の流出が停止する。When the pressure of the working fluid flowing in the line is lowered from this state, the equilibrium state between the pressure in the gas chamber 10 and the pressure in the working chamber 8 is broken, and the bellows 5 is contracted and deformed by the pressure in the gas chamber 10. At the same time, the working fluid in the working chamber 8 follows the contraction deformation of the bellows 5 and the port member 2
Is pushed into the line through the port 11 of the gas chamber 1
When the pressure of 0 and the pressure of the working chamber 8 become equal, the outflow of the working fluid from the working chamber 8 to the line stops.
【００２０】このようなラインから作動室８への作動流
体の流入、作動室８からラインへの作動流体の流出が繰
り返されることにより、ライン内の作動流体の脈動等が
吸収されるものである。By repeating the inflow of the working fluid from the line to the working chamber 8 and the outflow of the working fluid from the working chamber 8 to the line, the pulsation of the working fluid in the line is absorbed. .
【００２１】この場合、シェル１の空室４の長さｌはベ
ローズ５の自然長時の長さｈに近似する長さとなってい
るので、ベローズ５が自然長時の長さｈよりも大きく伸
長変形するようなことはなく、作動流体の最大流入時に
おいてもベローズ５の頂部５ａがシェル１の天井部１ａ
に当接することにより、ベローズ５の過大な伸長変形が
阻止されることになる。In this case, the length 1 of the vacant chamber 4 of the shell 1 is close to the length h of the bellows 5 when the bellows 5 is naturally long, so that the length of the bellows 5 is larger than the length h when the bellows 5 is naturally long. The top portion 5a of the bellows 5 does not extend and deform, and the top portion 5a of the bellows 5 is at the ceiling portion 1a of the shell 1 even when the working fluid reaches the maximum.
By abutting against, the excessive expansion deformation of the bellows 5 is prevented.
【００２２】したがって、ベローズ５が自然長よりも大
きく伸長変形して、谷部や山部に許容応力を超える応力
が作用し、耐久性を低下させるようなことがなくなる。Therefore, the bellows 5 is prevented from being stretched and deformed by a length larger than its natural length to cause stress exceeding the allowable stress to act on the valleys and peaks, thereby lowering the durability.
【００２３】一方、ベローズ５が縮小変形する場合に
は、ベローズ５の頂部５ａがポート部材２の突部２ａの
上面側に当接することにより、ベローズ５の過大な縮小
変形が阻止されることになる。したがって、最大縮小時
におけるベローズ５の長さ（作動流体の最大流出時にお
けるベローズ５の長さ）ｈ′が、ベローズ５が破損しな
い範囲内のものとなるように、ポート部材２の突部２ａ
の長さを設定することにより、ベローズ５の最大縮小時
における破損を防止できるものである。On the other hand, when the bellows 5 is contracted and deformed, the top portion 5a of the bellows 5 is brought into contact with the upper surface side of the projection 2a of the port member 2 to prevent excessive contraction and deformation of the bellows 5. Become. Therefore, the protrusion 2a of the port member 2 is adjusted so that the length of the bellows 5 at the time of maximum contraction (the length of the bellows 5 at the time of maximum outflow of the working fluid) h'is within a range in which the bellows 5 is not damaged.
It is possible to prevent the bellows 5 from being damaged when the bellows 5 is maximally reduced by setting the length of the.
【００２４】なお、上記の場合、ベローズ５の最大縮小
時の気体室１０の圧力をＰ2 、容積をＶ2 とし、ベロー
ズ５の最大伸長時の気体室１０の圧力をＰ3 、容積をＶ
3 とすると、ベローズ５による作動流体の吸収量ΔＶ
は、ベローズの体積をＶB とすれば、ΔＶ＝Ｖ2 −（Ｖ
3 ＋ＶB ）＝Ｖ2 −（（Ｐ2 ／Ｐ3 ）Ｖ2 ＋ＶB ）＝Ｖ
2 （１−（Ｐ2 ／Ｐ3 ））−ＶB で表されることにな
る。したがって、この式により、Ｐ2 、Ｐ3 又はＶ2 を
設定することにより、気体室１０の容積が求められるも
のである。In the above case, the pressure of the gas chamber 10 when the bellows 5 is maximally contracted is P 2 and the volume is V 2, and the pressure of the gas chamber 10 when the bellows 5 is maximally expanded is P 3 and the volume is V 2.
3 and when the absorption amount ΔV of the working fluid by the bellows 5
, If the volume of the bellows and V B, ΔV = V 2 - (V
3 + V B ) = V 2 − ((P 2 / P 3 ) V 2 + V B ) = V
2 (1- (P 2 / P 3)) - V will represented that by B. Therefore, the volume of the gas chamber 10 can be obtained by setting P 2 , P 3 or V 2 by this formula.
【００２５】図３および図４には、この発明によるアキ
ュムレータの第２の実施例が示されていて、このアキュ
ムレータは、シェル１の空室４の天井部１ａをベローズ
５の伸縮方向に移動可能、かつ，位置決め可能とすると
ともに、ポート部材２をベローズ５の伸縮方向に移動可
能、かつ位置決め可能としたものであって、その他の構
成は前記第１の実施例に示すものと同様の構成を有して
いるので、前記第１の実施例に示すものと同一の部分に
は同一の番号を付してその詳細な説明は省略するものと
する。FIGS. 3 and 4 show a second embodiment of the accumulator according to the present invention. This accumulator can move the ceiling portion 1a of the vacant chamber 4 of the shell 1 in the expansion and contraction direction of the bellows 5. In addition to being positionable, the port member 2 is movable in the expansion and contraction direction of the bellows 5 and positionable, and other configurations are the same as those shown in the first embodiment. Therefore, the same parts as those shown in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.
【００２６】シェル１の空室４の天井部１ａは樹脂、補
強板を埋設したゴム等の弾性体からなるものであって、
この天井部１ａは、シェル１の頂部に取り付けられてい
る調整手段１５によってベローズ５の伸縮方向に移動可
能、かつ位置決め可能となっている。The ceiling portion 1a of the vacant chamber 4 of the shell 1 is made of an elastic material such as resin or rubber in which a reinforcing plate is embedded.
The ceiling portion 1a can be moved and positioned in the expansion / contraction direction of the bellows 5 by an adjusting means 15 attached to the top portion of the shell 1.
【００２７】調整手段１５は、天井部１ａの中心部に一
端が連結するねじ部１６と、このねじ部１６の他端に螺
着されるストッパ部１７とからなり、ねじ部１６の中心
部にはシェル１の気体室１０内に通じる注入孔１６ａが
穿設され、注入孔１６ａの開口部はガス栓１８で塞がれ
るようになっている。The adjusting means 15 is composed of a screw portion 16 having one end connected to the central portion of the ceiling portion 1a and a stopper portion 17 screwed to the other end of the screw portion 16. Is formed with an injection hole 16a communicating with the inside of the gas chamber 10 of the shell 1, and the opening of the injection hole 16a is closed by a gas plug 18.
【００２８】ポート部材２は、内周面にねじ部７ａが螺
設される環状の外側部材７と、この外側部材７のねじ部
７ａに螺合するねじ部９ａが外周面に螺設される略筒状
の内側部材９とからなり、内側部材９の上端部にベロー
ズ５の最大縮小長さを調整する突部２ａが設けられるよ
うになっている。The port member 2 has an annular outer member 7 having a threaded portion 7a threaded on its inner peripheral surface, and a threaded portion 9a screwed onto the threaded portion 7a of the outer member 7 threaded on its outer peripheral surface. The inner member 9 has a substantially cylindrical shape, and the upper end of the inner member 9 is provided with a protrusion 2a for adjusting the maximum contracted length of the bellows 5.
【００２９】そして、上記のように構成したこの実施例
によるアキュムレータにあっては、シェル１の空室４の
天井部１ａが移動可能、かつ、位置決め可能となってい
るので、調整手段１５により天井部１ａを移動させるこ
とにより、シェル１の空室４の長さｌをベローズ５の自
然長時の長さｈに容易に近似させることができることに
なる。したがって、ベローズ５、シェル１の加工寸法、
組立て寸法等に誤差があっても、確実にシェル１の空室
４の長さｌをベローズ５の自然長時の長さｈに近似させ
ることができるものである。In the accumulator according to this embodiment constructed as described above, since the ceiling portion 1a of the empty chamber 4 of the shell 1 is movable and positionable, the ceiling is adjusted by the adjusting means 15. By moving the portion 1a, the length 1 of the empty chamber 4 of the shell 1 can be easily approximated to the length h of the bellows 5 when the bellows 5 has a natural length. Therefore, the processing dimensions of the bellows 5 and shell 1,
Even if there is an error in the assembling dimension or the like, the length 1 of the vacant chamber 4 of the shell 1 can be reliably approximated to the length h of the bellows 5 at the natural length.
【００３０】また、図４に示すように、ベローズ５の最
大伸長時に、ベローズ５の外周面がシェル１の内周面に
接触するように、シェル１の空室４の天井部１ａの位置
を調整することにより、ベローズ５が径方向外方へ変形
して破損することを確実に防止できるものである。Further, as shown in FIG. 4, the position of the ceiling portion 1a of the vacant chamber 4 of the shell 1 is set so that the outer peripheral surface of the bellows 5 contacts the inner peripheral surface of the shell 1 when the bellows 5 is maximally expanded. By adjusting, it is possible to reliably prevent the bellows 5 from being deformed and broken outward in the radial direction.
【００３１】さらに、ポート部材２を外側部材７と内側
部材９の二部材に分割して、内側部材９の外側部材７に
対する螺着位置を変更することにより、ベローズ５の最
大縮小長さを調整する突部２ａの位置を変更できるの
で、ベローズ５の最大縮小変形時の長さをベローズ５が
破損しない範囲内に容易に設定することができるもので
ある。Furthermore, the maximum reduction length of the bellows 5 is adjusted by dividing the port member 2 into two members, the outer member 7 and the inner member 9, and changing the screwing position of the inner member 9 with respect to the outer member 7. Since the position of the protruding portion 2a to be changed can be changed, the length of the bellows 5 at the time of maximum contraction deformation can be easily set within a range in which the bellows 5 is not damaged.
【００３２】[0032]
【発明の効果】この発明は、内部に空室を有するととも
に前記空室に連通するポートを有するシェル及び前記シ
ェルのポートを囲んで密封に取り付けられる開口部を有
するとともに前記空室を前記ポート側の作動室と気体室
とに区画するベローズとを具備し、前記シェルの空室を
形成する内周面は前記ベローズの外周面に近接する大き
さを有するとともに前記ベローズの頂部と対向する天井
部はベローズの自然長に略近似する長さに位置する構成
としたことにより、以下のような効果を奏する。すなわ
ち、ベローズは自然長の状態にあるとき、頂部がシェル
の天井部に当接することになるので、作動流体の最大流
入時においてもベローズが自然長よりも大きく伸長変形
することはない。したがって、ベローズの山部、谷部に
許容応力を超える応力が作用し、耐久性が損なわれるよ
うなことはなく、耐久性が大幅に向上することになる。According to the present invention, a shell having a void therein and a port communicating with the void and an opening for sealingly surrounding the port of the shell and sealingly attaching the void to the port are provided. And a bellows partitioning into a working chamber and a gas chamber, the inner peripheral surface of the shell forming an empty chamber having a size close to the outer peripheral surface of the bellows, and a ceiling portion facing the top of the bellows. The following effects are obtained by adopting a configuration in which the length is approximately close to the natural length of the bellows. That is, when the bellows is in the natural length state, the top portion comes into contact with the ceiling portion of the shell, so that the bellows does not extend and deform more than the natural length even at the maximum inflow of the working fluid. Therefore, the stress that exceeds the allowable stress acts on the peaks and valleys of the bellows, and the durability is not impaired, and the durability is significantly improved.
【図１】この発明によるアキュムレータの第１の実施例
を示した縦断面図であり、作動流体の最大流入状態を示
したものである。FIG. 1 is a vertical cross-sectional view showing a first embodiment of an accumulator according to the present invention, showing a maximum inflow state of a working fluid.
【図２】図１に示すものの作動流体の最大流出状態を示
したものである。FIG. 2 shows the maximum outflow state of the working fluid shown in FIG.
【図３】この発明によるアキュムレータの第２の実施例
を示した縦断面図である。FIG. 3 is a vertical sectional view showing a second embodiment of the accumulator according to the present invention.
【図４】図３に示すものの作動流体の最大流入時の状態
を示したものである。FIG. 4 shows a state when the working fluid shown in FIG.
【図５】従来のアキュムレータの一例を示した縦断面図
である。FIG. 5 is a vertical sectional view showing an example of a conventional accumulator.
１、２１……シェル １ａ、２１ａ……天井部 ２、２２……ポート部材 ２ａ……突部 ２ｂ、７ａ、９ａ、１６……ねじ部 ４、２４……空室 ５、２５……ベローズ ５ａ、２５ａ……頂部 ６、２６……スペーサ ７……外側部材 ８、２８……作動室 ９……内側部材 １０、３０……気体室 １１、３１……ポート １２、１３、１４……Ｏリング １５……調整手段 １７……ストッパ部 １８……ガス栓 1, 21 ... Shell 1a, 21a ... Ceiling part 2, 22 ... Port member 2a ... Projection parts 2b, 7a, 9a, 16 ... Screw part 4, 24 ... Vacancy 5, 25 ... Bellows 5a , 25a ... Top 6, 26 ... Spacer 7 ... Outer member 8, 28 ... Working chamber 9 ... Inner member 10, 30 ... Gas chamber 11, 31 ... Port 12, 13, 14 ... O-ring 15 ... Adjusting means 17 ... Stopper section 18 ... Gas plug
Claims (1)
空室（４）に連通するポート（１１）を有するシェル
（１）及び前記シェル（１）のポート（１１）を囲んで
密封に取り付けられる開口部を有するとともに前記空室
（４）を前記ポート（１１）側の作動室（８）と気体室
（１０）とに区画するベローズ（５）とを具備し、前記
シェル（１）の空室（４）を形成する内周面は前記ベロ
ーズ（５）の外周面に近接する大きさを有するとともに
前記ベローズ（５）の頂部（５ａ）と対向する天井部
（１ａ）はベローズ（５）の自然長に略近似する長さに
位置するアキュムレータ。1. A shell (1) having an empty chamber (4) inside and a port (11) communicating with the empty chamber (4) and a port (11) of the shell (1) are enclosed and hermetically sealed. The shell (1) is provided with a bellows (5) having an opening to be attached and partitioning the empty chamber (4) into a working chamber (8) on the side of the port (11) and a gas chamber (10). Has a size close to the outer peripheral surface of the bellows (5), and the ceiling portion (1a) facing the top portion (5a) of the bellows (5) has a bellows (4a). An accumulator located at a length approximately close to the natural length of 5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25679494A JP3333649B2 (en) | 1994-10-21 | 1994-10-21 | accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25679494A JP3333649B2 (en) | 1994-10-21 | 1994-10-21 | accumulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08121402A true JPH08121402A (en) | 1996-05-14 |
| JP3333649B2 JP3333649B2 (en) | 2002-10-15 |
Family
ID=17297540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25679494A Expired - Fee Related JP3333649B2 (en) | 1994-10-21 | 1994-10-21 | accumulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3333649B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023103129A (en) * | 2022-01-13 | 2023-07-26 | 日本発條株式会社 | Manufacturing method and outer body of accumulator |
-
1994
- 1994-10-21 JP JP25679494A patent/JP3333649B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023103129A (en) * | 2022-01-13 | 2023-07-26 | 日本発條株式会社 | Manufacturing method and outer body of accumulator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3333649B2 (en) | 2002-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20100108168A1 (en) | Accumulator | |
| JP2003172301A (en) | accumulator | |
| JPH0324367A (en) | Inner tank forming body enabling oil to be expanded in liquid power transmission housing | |
| GB2083555A (en) | Pressure vessel assemblies | |
| KR20040047778A (en) | Pulsation Damping Assembly and Method | |
| JP3333649B2 (en) | accumulator | |
| JPS62191687A (en) | Lift valve for rotary compressor | |
| JP3823263B2 (en) | Metal bellows accumulator | |
| JPH08121401A (en) | Accumulator | |
| US4351363A (en) | Hydro-pneumatic pressure vessel | |
| JPH0417844Y2 (en) | ||
| US4893782A (en) | Metallic seat for fluid valve | |
| JP2557287Y2 (en) | accumulator | |
| KR0164645B1 (en) | Water hammer | |
| JPH02225801A (en) | Accumulator | |
| JP2606214Y2 (en) | accumulator | |
| JPH04321801A (en) | Bladder for accumulator | |
| EP1887353A1 (en) | Damper | |
| JP2002372001A (en) | accumulator | |
| JP2002115701A (en) | Safety device for dual-structured cylinder type accumulator | |
| JP2582890B2 (en) | Pulsation absorber | |
| JPH0417846Y2 (en) | ||
| JP3221144B2 (en) | Pulsation absorber | |
| JPH0343476Y2 (en) | ||
| JPH0114441B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |