CA2105084C - Membrane accumulator with securing ring - Google Patents
Membrane accumulator with securing ring Download PDFInfo
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- CA2105084C CA2105084C CA002105084A CA2105084A CA2105084C CA 2105084 C CA2105084 C CA 2105084C CA 002105084 A CA002105084 A CA 002105084A CA 2105084 A CA2105084 A CA 2105084A CA 2105084 C CA2105084 C CA 2105084C
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- Prior art keywords
- housing
- connecting part
- hydraulic accumulator
- dividing wall
- accumulator according
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- 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
- F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
- F15B1/14—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery by means of a rigid annular supporting member
-
- 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
- F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
-
- 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
- F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment
-
- 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
- F15B2201/411—Liquid ports having valve 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
- F15B2201/415—Gas 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
- F15B2201/43—Anti-extrusion means
- F15B2201/435—Anti-extrusion means being fixed to the 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
- F15B2201/60—Assembling or methods for making accumulators
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- 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)
- Liquid Developers In Electrophotography (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Centrifugal Separators (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Medicinal Preparation (AREA)
- Materials For Medical Uses (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A hydraulic accumulator has a partition arranged in a housing that divides inside the housing a liquid chamber from a gas chamber and that is retained by means of a retaining member linked to a connecting member. In order to establish this connection, the retaining member surrounds the connecting member at least partially.
Description
The invention relates to a hydraulic accumulator with a dividing wall. located in a housing, which dividing wall in the housing separates a liquid chamber from a gas chamber and which is held by means of a retaining part, which is.
connected to an annular connecting part, which is welded to the housing.
A hydraulic accumulator of this type is known from DE-OS 34 04 897. In this known hydraulic accumulator, the retaining part and the connecting part are constructed in the form of a ring, .the retaining part retaining the dividing wall being inserted with the formation of a press fit with a comically constructed wall of the housing, in the latter and being in abutment with 'the connecting part by its side facing the gas chamber, which connecting part is securely connected to the housing by means of an electron beam welding process. The press fit 'jointly caused by the conicity of the housing wall is necessary in order to avoid a movement of the retaining part with the dividing wall towards the liquid chamber, in so far that the gas chamber comprises a corresponding quantity of gas under pressure. Towards the gas side, i:.he retaining part is held in its position by means of the connecting part located in abutment therewith. Despite this type of fixing of the retaining part within the housing, the latter is able to move along the conical wall in the direction of the liquid chamber and. the dividing wall can in this case be released, which leaves the hydraulic accumulator unusable.
Furthermore, the pressing of the retaining part into the housing is difficult to carry out and is expensive on account of the apparatus necessary for the pressing-in.
Based on this prior art, it is the object of the inven-tion to provide a hydraulic ac~uiriulator, which can be produced economically and in which it is reliably ensured that the dividing wall is held reliably by the retaining part in any operating state of the hydraulic accumulator.
The present invention provides an hydraulic accumulator with a dividing wall located in a housing, which in the housing separtes a liquid chamber from a gas chamber and which is held by means of a retaining part, which is connected to an annular connecting part, which is welded to the housing, characterised in that for producing the connection, the retaining part at least partly surrounds the connecting part.
More specifically, the present invention provides a hydraulic accumulator, comprising a housing having a liquid chamber and a gas chamber, a dividing wall in the housing separating the liquid chamber from the gas chamber, an annular connecting part welded to the housing and formed of metal, and a retaining part coupled to the connecting part and holding the dividing wall in the housing. The retaining part at least partly surrounds the connecting part, being separately formed as a different member from the connecting part, being formed of synthetic material, and pressing parts of the dividing wall against the housing in gas-tight manner.
2a The present invention also provides a hydraulic accumulator, comprising a housing having a liquid chamber and a gas chamber, a dividing wall in the housing separating the liquid chamber from the gas chamber, the dividing wall having a beaded edge, an annular connecting part welded to the housing, and an annular retaining part coupled to the connecting part and holding the dividing wall in the housing. The retaining part at least partly surrounds the connecting part, and being separately formed as a different member from the connecting part, the retaining part including indentations, a groove receiving the connecting part, and a channel receiving the beaded edge of the dividing wall.
Due to the fact that in the hydraulic accumulator according to the invention, for producing the connection between the retaining part and the connecting part, the retaining part at least partly surrounds the connecting part, in any operating state of the hydraulic accumulator, the retaining part is held securely in its position by way of the connecting part and cannot carry out a movement either towards the gas chamber or towards the liquid chamber, so that the dividing wall also maintains its position within the retaining part and does not separate from the retaining part. Thanks to the arrangement 2b according to the invention, the housing wall may also have a cylindrical construction at the point of the retaining part and the retaining part with the dividing wall can be inserted loosely in the housing, both of which contribute to the fact that the manufacturing costs for a hydraulic accumulator can be reduced further.
In the hydraulic accumulator according to the invention, the retaining part and the connecting part are preferably constructed in the form of a ring.
In a preferred embodiment of the hydraulic accumulator according to the invention, the retaining part is formed from synthetic material and the connecting part from steel, the synthetic material retaining part pressing parts of the dividing wall in a gas-tight manner against the housing.
The retaining parts in the form of clamping rings, which were previously made from steel, are on the one hand complicated and expensive to manufacture and on the other hand they are also not always capable of adapting to the housing parts of the housing which are frequently not machined to be exactly round, which leads to leakages.
This is avoided when using a retaining part consisting of synthetic material.
connected to an annular connecting part, which is welded to the housing.
A hydraulic accumulator of this type is known from DE-OS 34 04 897. In this known hydraulic accumulator, the retaining part and the connecting part are constructed in the form of a ring, .the retaining part retaining the dividing wall being inserted with the formation of a press fit with a comically constructed wall of the housing, in the latter and being in abutment with 'the connecting part by its side facing the gas chamber, which connecting part is securely connected to the housing by means of an electron beam welding process. The press fit 'jointly caused by the conicity of the housing wall is necessary in order to avoid a movement of the retaining part with the dividing wall towards the liquid chamber, in so far that the gas chamber comprises a corresponding quantity of gas under pressure. Towards the gas side, i:.he retaining part is held in its position by means of the connecting part located in abutment therewith. Despite this type of fixing of the retaining part within the housing, the latter is able to move along the conical wall in the direction of the liquid chamber and. the dividing wall can in this case be released, which leaves the hydraulic accumulator unusable.
Furthermore, the pressing of the retaining part into the housing is difficult to carry out and is expensive on account of the apparatus necessary for the pressing-in.
Based on this prior art, it is the object of the inven-tion to provide a hydraulic ac~uiriulator, which can be produced economically and in which it is reliably ensured that the dividing wall is held reliably by the retaining part in any operating state of the hydraulic accumulator.
The present invention provides an hydraulic accumulator with a dividing wall located in a housing, which in the housing separtes a liquid chamber from a gas chamber and which is held by means of a retaining part, which is connected to an annular connecting part, which is welded to the housing, characterised in that for producing the connection, the retaining part at least partly surrounds the connecting part.
More specifically, the present invention provides a hydraulic accumulator, comprising a housing having a liquid chamber and a gas chamber, a dividing wall in the housing separating the liquid chamber from the gas chamber, an annular connecting part welded to the housing and formed of metal, and a retaining part coupled to the connecting part and holding the dividing wall in the housing. The retaining part at least partly surrounds the connecting part, being separately formed as a different member from the connecting part, being formed of synthetic material, and pressing parts of the dividing wall against the housing in gas-tight manner.
2a The present invention also provides a hydraulic accumulator, comprising a housing having a liquid chamber and a gas chamber, a dividing wall in the housing separating the liquid chamber from the gas chamber, the dividing wall having a beaded edge, an annular connecting part welded to the housing, and an annular retaining part coupled to the connecting part and holding the dividing wall in the housing. The retaining part at least partly surrounds the connecting part, and being separately formed as a different member from the connecting part, the retaining part including indentations, a groove receiving the connecting part, and a channel receiving the beaded edge of the dividing wall.
Due to the fact that in the hydraulic accumulator according to the invention, for producing the connection between the retaining part and the connecting part, the retaining part at least partly surrounds the connecting part, in any operating state of the hydraulic accumulator, the retaining part is held securely in its position by way of the connecting part and cannot carry out a movement either towards the gas chamber or towards the liquid chamber, so that the dividing wall also maintains its position within the retaining part and does not separate from the retaining part. Thanks to the arrangement 2b according to the invention, the housing wall may also have a cylindrical construction at the point of the retaining part and the retaining part with the dividing wall can be inserted loosely in the housing, both of which contribute to the fact that the manufacturing costs for a hydraulic accumulator can be reduced further.
In the hydraulic accumulator according to the invention, the retaining part and the connecting part are preferably constructed in the form of a ring.
In a preferred embodiment of the hydraulic accumulator according to the invention, the retaining part is formed from synthetic material and the connecting part from steel, the synthetic material retaining part pressing parts of the dividing wall in a gas-tight manner against the housing.
The retaining parts in the form of clamping rings, which were previously made from steel, are on the one hand complicated and expensive to manufacture and on the other hand they are also not always capable of adapting to the housing parts of the housing which are frequently not machined to be exactly round, which leads to leakages.
This is avoided when using a retaining part consisting of synthetic material.
DE-OS 34 04 897 discloses a synthetic material clamping ring of a glass fibre reinforced Polyamide 66 (polyhexa-methylene adipinamide) with a glass fibre proportion of 45 to 55~. This known synthetic material clamping ring is suitable for low and high operating temperatures of the hydraulic accumulator in the range of approximately -40°C to +120°C. However, since the thermal coefficient of linear expansion between the steel material and the Polyamide 66 amounts to approximately 1,2, as before this leads to leakages and~a failure of the hydraulic accumulator, on departing from the temperature range discussed: Therefore, according to the invention, a polyarylamide with a glass fibre proportion up to 60~ is preferably used, which has approxianately the same thermal coefficient of linear expansion as steel. Thus, the solution according to the invention can be used fox any hydraulic accumulator, irrespective of the temperature range in which this operates, without this leading to a very different expansion or shrinkage of the retaining part consisting of synthetic material with respect to the housing, which impairs the function of the hydraulic accumulator. The glass fibre reinforced polyarylamide, which can be used, has an increased E-modulus value of up to 23,000 N/mm~, so that the synthetic retain~.ng part able to be produced by an injection moulding method has high rigidity and dimensional stability.
In a further preferred embodiment, the annular retaining' part comprises indentations and a groove for engagement with the connecting part and has a channel for receiving the bead-shaped edge of the dividing wall. On account of this construction, the retaining part can be snapped easily onto the connecting part and the dividing wall is held reliably by the retaining part.
On its side remote from the dividing wall and on its side facing the housing, the retaining part preferably _ 4 _ comprises a bevel, which serves as an assembly aid.
In so far that the housing comprises an abutment for the dividing wall, the housing assists in the reliable fixing of position of the dividing wall in the retaining part.
In a further particularly preferred embodiment of the hydraulic accumulator according to the in~'ention, the connect-ing part inside the housing covers the seam between two shells substantially forming the housing, which shells can be connected to. each other along the seam by means of a welding process, in particular an electron beam welding process, during which the connecting part can be connected simultaneously to the housing. Due to this, the hydraulic accumulator can be produced economically and the connecting part and thus also the retaining part with the dividing wall are held reliably in their position.
The hydraulic accumulator according to the invention will be described in detail hereafter, with reference to the drawings, in which:
Figure 7 is a sectional view thxough the hydraulic accumulator according to the invention;
Figure 2 shows the right-hand edge of the retaining part, seen in Figure 1, to an enlarged scale.
The hydraulic accumulator illustrated in Figure 1 is a so called diaphragm accumulator with a dividing wall 12 in the form of a resilient diaphragm, which can be milled, located in a housing 10. The dividing wall 12 divides the housing 10 internally into a liquid chamber 14 and into a gas chamber 16. Both the liquid chamber 14 as~ well as the gas chamber 16 each comprise a connection 18 or 20, by means of which the hydraulic accumulator can be connected to pipes of a hydraulic system (not shown).
Comparable hydraulic accumulators with the features described previously belong to the prior art, so that in the following the hydraulic accumulator will be described only in so far as is necessary in order to explain the invention.
In the direction of view of Figure 1, the housing 10 consists of an upper housing shell 22 and of a lower housing shell 24, which abut one against the other along a seam 26. The two shells 22 and 24 can be connected to each other along this seam 26 in order to form the housing 10;
by means of an electron beam welding process, the welding seam being designated by the reference numeral 28 in Figure a.
The retaining part 30 with the dividing wall 12 and the connecting part 32 is located inside the housing 10.
The connecting part 32 forms a ring of steel, the height of which is dimensioned so that the seam 26 inside the housing is covered by a projecting portion. The retaining part 30 is likewise constructed in the form of a ring and an its side facing the connecting part 32 comprises a groove 34 (see Figure 2), which is constructed with a substantially rectangular cross-section and which in the corners of its groove base has two recesses 36 of circular cross-section for increasing the elasticity of the individual components of the retaining part 30. The groove 34 is constructed so that the steel ring 32 can be received readily therein., the retaining part 30 being able to be snapped onto the connecting part 32 by way of the groove 34. On its side facing the gas chamber 16, the retaining part 30 comprises continuous recesses in the form of indentations 38, which are constructed with a rectangular cross-section and which are guided around the retaining part 30 at equal distances from each other. The depth of the indentations 38 a.s dimen-sioned such that it amounts to approximately half the height of the annular retaining part 30. The indentations 38 ~~.~~~8~~
terminate in an imaginary straight line 39, which connects the respective end of these indentations 38 to the groove 34 and indeed at the point which forms the transition from the groove base to the groove side wall, which as adjacent to the channel 40.
On its side facing the liquid chamber 14, which faces the inner wall of the housing, the retaining part 30 has a channel 40,~in which the bead-shaped edge 42 of the dividing diaphragm 12 engages. " For supporting this bead-shaped edge 42 and in order to prevent the dividing diaphragm 12 from sliding out of the channel 40 under load, at its lower end seen in Figure 1, the retaining part 30 has a thickened portion 44. On the side opposite the channel 40, located at the same height, an annular shoulder 46 is provided along the inner wall of the housing, which forms a type of abutment for the dividing wall 12. Thanks to the shoulder 46 and the thickened portion 44, the edge 42 of the dividing diaphragm 12 is reliably fixed in its marginal position by the annular retaining part 30. The thickened portion 44 comprises rounded transitions, along which the dividing wall 12 may bear during operation, without being damaged.
The retaining part 30 is formed from synthetic material in the form of a polyarylamide with a glass fibre proportion up to 60~ and can be produced by an injection moulding method of the normal type. On its side remote from the dividing wall 12 and facing the housing 10, the retaining part comprises an annular bevel 48 (see Figure 2), which seen in Figure 2, encloses an acute angle with the vertical.
This bevel 48 forms an assembly aid when the retaining part 30~is snapped onto or off the connecting part 32.
However, another glass fibre reinforced synthetic material may also be used, for example a polyamide with a glass fibre proportion up to 40 to 50~. With the arrangement according to the invention it is reliably achieved that the synthetic material -retaining part 30 presses the dividing wall 12 in a gas-tight manner against the housing i0 and thus a reliable separation of the liquid chamber 14 from the gas chamber 16 is achieved. The inner wall of the housing 10 has a cylindrical construction in the region of the retaining part 30.
For the manufacture of the hydraulic accumulator accord-ing to Figure 1, the dividing wall 12 together with the retaining part 30 and the connecting part 32 can be inserted loosely in the inside of the housing 10. Thanks to the shoulder 46 in the housing wall, these parts remain in their position illustrated in Figure 1, at the time of assembly, whereby after joining together of the two shells 22 and 24 and the subsequent electron beam welding along the seam 26, the connecting part 32 is securely welded to the housing 10. The invention can also be used fox other hydraulic accumulators, for example for a bladder accumulator.
All the features mentioned in the preceding Description and also those which are revealed solely in the drawings are as further developments, components of the invention, even if they are not particularly emphasized and in particular not mentioned in the Maims.
In a further preferred embodiment, the annular retaining' part comprises indentations and a groove for engagement with the connecting part and has a channel for receiving the bead-shaped edge of the dividing wall. On account of this construction, the retaining part can be snapped easily onto the connecting part and the dividing wall is held reliably by the retaining part.
On its side remote from the dividing wall and on its side facing the housing, the retaining part preferably _ 4 _ comprises a bevel, which serves as an assembly aid.
In so far that the housing comprises an abutment for the dividing wall, the housing assists in the reliable fixing of position of the dividing wall in the retaining part.
In a further particularly preferred embodiment of the hydraulic accumulator according to the in~'ention, the connect-ing part inside the housing covers the seam between two shells substantially forming the housing, which shells can be connected to. each other along the seam by means of a welding process, in particular an electron beam welding process, during which the connecting part can be connected simultaneously to the housing. Due to this, the hydraulic accumulator can be produced economically and the connecting part and thus also the retaining part with the dividing wall are held reliably in their position.
The hydraulic accumulator according to the invention will be described in detail hereafter, with reference to the drawings, in which:
Figure 7 is a sectional view thxough the hydraulic accumulator according to the invention;
Figure 2 shows the right-hand edge of the retaining part, seen in Figure 1, to an enlarged scale.
The hydraulic accumulator illustrated in Figure 1 is a so called diaphragm accumulator with a dividing wall 12 in the form of a resilient diaphragm, which can be milled, located in a housing 10. The dividing wall 12 divides the housing 10 internally into a liquid chamber 14 and into a gas chamber 16. Both the liquid chamber 14 as~ well as the gas chamber 16 each comprise a connection 18 or 20, by means of which the hydraulic accumulator can be connected to pipes of a hydraulic system (not shown).
Comparable hydraulic accumulators with the features described previously belong to the prior art, so that in the following the hydraulic accumulator will be described only in so far as is necessary in order to explain the invention.
In the direction of view of Figure 1, the housing 10 consists of an upper housing shell 22 and of a lower housing shell 24, which abut one against the other along a seam 26. The two shells 22 and 24 can be connected to each other along this seam 26 in order to form the housing 10;
by means of an electron beam welding process, the welding seam being designated by the reference numeral 28 in Figure a.
The retaining part 30 with the dividing wall 12 and the connecting part 32 is located inside the housing 10.
The connecting part 32 forms a ring of steel, the height of which is dimensioned so that the seam 26 inside the housing is covered by a projecting portion. The retaining part 30 is likewise constructed in the form of a ring and an its side facing the connecting part 32 comprises a groove 34 (see Figure 2), which is constructed with a substantially rectangular cross-section and which in the corners of its groove base has two recesses 36 of circular cross-section for increasing the elasticity of the individual components of the retaining part 30. The groove 34 is constructed so that the steel ring 32 can be received readily therein., the retaining part 30 being able to be snapped onto the connecting part 32 by way of the groove 34. On its side facing the gas chamber 16, the retaining part 30 comprises continuous recesses in the form of indentations 38, which are constructed with a rectangular cross-section and which are guided around the retaining part 30 at equal distances from each other. The depth of the indentations 38 a.s dimen-sioned such that it amounts to approximately half the height of the annular retaining part 30. The indentations 38 ~~.~~~8~~
terminate in an imaginary straight line 39, which connects the respective end of these indentations 38 to the groove 34 and indeed at the point which forms the transition from the groove base to the groove side wall, which as adjacent to the channel 40.
On its side facing the liquid chamber 14, which faces the inner wall of the housing, the retaining part 30 has a channel 40,~in which the bead-shaped edge 42 of the dividing diaphragm 12 engages. " For supporting this bead-shaped edge 42 and in order to prevent the dividing diaphragm 12 from sliding out of the channel 40 under load, at its lower end seen in Figure 1, the retaining part 30 has a thickened portion 44. On the side opposite the channel 40, located at the same height, an annular shoulder 46 is provided along the inner wall of the housing, which forms a type of abutment for the dividing wall 12. Thanks to the shoulder 46 and the thickened portion 44, the edge 42 of the dividing diaphragm 12 is reliably fixed in its marginal position by the annular retaining part 30. The thickened portion 44 comprises rounded transitions, along which the dividing wall 12 may bear during operation, without being damaged.
The retaining part 30 is formed from synthetic material in the form of a polyarylamide with a glass fibre proportion up to 60~ and can be produced by an injection moulding method of the normal type. On its side remote from the dividing wall 12 and facing the housing 10, the retaining part comprises an annular bevel 48 (see Figure 2), which seen in Figure 2, encloses an acute angle with the vertical.
This bevel 48 forms an assembly aid when the retaining part 30~is snapped onto or off the connecting part 32.
However, another glass fibre reinforced synthetic material may also be used, for example a polyamide with a glass fibre proportion up to 40 to 50~. With the arrangement according to the invention it is reliably achieved that the synthetic material -retaining part 30 presses the dividing wall 12 in a gas-tight manner against the housing i0 and thus a reliable separation of the liquid chamber 14 from the gas chamber 16 is achieved. The inner wall of the housing 10 has a cylindrical construction in the region of the retaining part 30.
For the manufacture of the hydraulic accumulator accord-ing to Figure 1, the dividing wall 12 together with the retaining part 30 and the connecting part 32 can be inserted loosely in the inside of the housing 10. Thanks to the shoulder 46 in the housing wall, these parts remain in their position illustrated in Figure 1, at the time of assembly, whereby after joining together of the two shells 22 and 24 and the subsequent electron beam welding along the seam 26, the connecting part 32 is securely welded to the housing 10. The invention can also be used fox other hydraulic accumulators, for example for a bladder accumulator.
All the features mentioned in the preceding Description and also those which are revealed solely in the drawings are as further developments, components of the invention, even if they are not particularly emphasized and in particular not mentioned in the Maims.
Claims (18)
1. A hydraulic accumulator, comprising:
a housing having a liquid chamber and a gas chamber;
a dividing wall in said housing separating said liquid chamber from said gas chamber;
an annular connecting part welded to said housing and formed of metal; and a retaining part coupled to said connecting part and holding said dividing wall in said housing, said retaining part at least partly surrounding said connecting part, being separately formed as a different member from said connecting part, being formed of synthetic material, and pressing parts of said dividing wall against said housing in gas-tight manner.
a housing having a liquid chamber and a gas chamber;
a dividing wall in said housing separating said liquid chamber from said gas chamber;
an annular connecting part welded to said housing and formed of metal; and a retaining part coupled to said connecting part and holding said dividing wall in said housing, said retaining part at least partly surrounding said connecting part, being separately formed as a different member from said connecting part, being formed of synthetic material, and pressing parts of said dividing wall against said housing in gas-tight manner.
2. A hydraulic accumulator according to claim 1, wherein said connecting part and said retaining part are rings.
3. A hydraulic accumulator according to claim 1 or 2, wherein said synthetic material is reinforced with glass fibers.
4. A hydraulic accumulator according to claim 3, wherein said synthetic material is a polyamide with a glass fiber proportion of at least 40 to 50 percent.
5. A hydraulic accumulator according to claim 3, wherein said synthetic material is a polyarylamide with a glass fiber proportion of at least 60 percent.
6. A hydraulic accumulator according to any one of claims 1 to 5, wherein said dividing wall comprises a beaded edge and said retaining part is annular and comprises indentations, a groove receiving said connecting part, and a channel receiving said beaded edge of said dividing wall.
7. A hydraulic accumulator according to any one of claims 1 to 6, wherein said retaining part is annular to define a central axis and comprises a bevel on a side thereof remote from said dividing wall and on an exposed, radially outwardly directed face directed toward said housing, said bevel forming an acute angle with said central axis and tapering from a location adjacent said connecting part radially inwardly.
8. A hydraulic accumulator according to any one of claims 1 to 7, wherein said housing comprises an abutment engaging said dividing wall.
9. A hydraulic accumulator according to any one of claims 1 to 8, wherein said housing comprises two shells coupled along a seam and said connecting part covers said seam inside said housing such that said connecting part is connected to said housing simultaneously with connection of said shells.
10. A hydraulic accumulator according to claim 9, wherein said shells are connected by electron beam welding.
11. A hydraulic accumulator, comprising:
a housing having a liquid chamber and a gas chamber;
a dividing wall in said housing separating said liquid chamber from said gas chamber, said dividing wall having a beaded edge;
an annular connecting part welded to said housing; and an annular retaining part coupled to said connecting part and holding said dividing wall in said housing, said retaining part at least partly surrounding said connecting part, and being separately formed as a different member from said connecting part, said retaining part including indentations, a groove receiving said connecting part, and a channel receiving said beaded edge of said dividing wall.
a housing having a liquid chamber and a gas chamber;
a dividing wall in said housing separating said liquid chamber from said gas chamber, said dividing wall having a beaded edge;
an annular connecting part welded to said housing; and an annular retaining part coupled to said connecting part and holding said dividing wall in said housing, said retaining part at least partly surrounding said connecting part, and being separately formed as a different member from said connecting part, said retaining part including indentations, a groove receiving said connecting part, and a channel receiving said beaded edge of said dividing wall.
12. A hydraulic accumulator according to claim 11, wherein said retaining part comprises a bevel on a side thereof remote from said dividing wall and on a face directed toward said housing.
13. A hydraulic accumulator according to claim 11 or 12, wherein said housing comprises an abutment engaging said dividing wall.
14. A hydraulic accumulator according to claim 11, 12 or 13, wherein said retaining part is formed of synthetic material, and presses parts of said dividing wall against said housing in a gas-tight-manner, and said connecting part is formed of steel.
15. A hydraulic accumulator according to claim 11, 12 or 13, wherein said connecting part and said retaining part are formed of different materials.
16. A hydraulic accumulator according to claim 15, wherein said connecting part is formed of metal, and said retaining part is formed of synthetic material.
17. A hydraulic accumulator according to any one of claims 11 to 16, wherein said housing comprises two shells coupled along a seam, and said connecting part covers said seam inside said housing such that said connecting part is connected to said housing simultaneously with connection of said shells.
18. A hydraulic accumulator according to claim 17, wherein said shells are connected by electron beam welding.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4131524A DE4131524A1 (en) | 1991-09-21 | 1991-09-21 | MEMBRANE MEMORY WITH FASTENING RING |
| DEP4131524.3 | 1991-09-21 | ||
| PCT/EP1992/001679 WO1993006374A1 (en) | 1991-09-21 | 1992-07-23 | Membrane accumulator with securing ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2105084A1 CA2105084A1 (en) | 1993-03-22 |
| CA2105084C true CA2105084C (en) | 2003-04-08 |
Family
ID=6441197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002105084A Expired - Lifetime CA2105084C (en) | 1991-09-21 | 1992-07-23 | Membrane accumulator with securing ring |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0604445B1 (en) |
| JP (1) | JP3179490B2 (en) |
| AT (1) | ATE130076T1 (en) |
| AU (1) | AU2349992A (en) |
| CA (1) | CA2105084C (en) |
| DE (2) | DE4131524A1 (en) |
| DK (1) | DK0604445T3 (en) |
| ES (1) | ES2079199T3 (en) |
| FI (1) | FI932305A (en) |
| NO (1) | NO302434B1 (en) |
| WO (1) | WO1993006374A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4116482A1 (en) * | 1991-05-21 | 1992-11-26 | Hydac Technology Gmbh | METHOD FOR MEASURING THE PRESSURE OF A GAS IN A GAS PRESSURE STORAGE AND DEVICE FOR CARRYING OUT THE SAME |
| DE19633644A1 (en) * | 1996-08-21 | 1998-03-05 | Behrens Ag I K C | Damping device for the hydraulic drive system of a punching machine |
| DE19706427A1 (en) | 1997-02-19 | 1998-08-20 | Itt Mfg Enterprises Inc | Pressure fluid accumulator |
| DE59705714D1 (en) * | 1997-06-06 | 2002-01-17 | Hydac Technology Gmbh | METHOD FOR PRODUCING A MEMBRANE MEMORY |
| DE19911030A1 (en) * | 1998-08-17 | 2000-02-24 | Continental Teves Ag & Co Ohg | Pressure fluid accumulator |
| EP0980981B1 (en) | 1998-08-17 | 2003-11-26 | Continental Teves AG & Co. oHG | Fluid pressure accumulator |
| DE10355435B3 (en) * | 2003-11-27 | 2005-05-19 | Hydac Technology Gmbh | Hydraulic oil reservoir for hydraulic circuit has housing divided internally by separation element secured via fixing component cooperating with edge rim attached to free edge of separation element |
| DE102008039960A1 (en) | 2007-09-05 | 2009-03-12 | Continental Teves Ag & Co. Ohg | Brake system for a motor vehicle |
| DE102011116240A1 (en) | 2011-10-18 | 2013-04-18 | Hydac Technology Gmbh | Hydro store connected pipeline of hydraulic system, has wave crests and wave troughs which are rolled-out smoothly towards the direction of fluid side of partition |
| DE102017006064A1 (en) | 2017-06-27 | 2018-12-27 | Hydac Technology Gmbh | hydraulic accumulator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2325844C3 (en) * | 1973-05-22 | 1982-01-21 | Daimler-Benz Ag, 7000 Stuttgart | Hydropneumatic pressure accumulator |
| DE3142390A1 (en) * | 1981-10-26 | 1983-05-26 | Alfred Teves Gmbh, 6000 Frankfurt | Pressure reservoir |
| DE3404897A1 (en) * | 1984-02-11 | 1985-08-14 | Integral Hydraulik & Co, 4000 Düsseldorf | Hydraulic accumulator |
-
1991
- 1991-09-21 DE DE4131524A patent/DE4131524A1/en not_active Withdrawn
-
1992
- 1992-07-23 DK DK92916264.2T patent/DK0604445T3/en active
- 1992-07-23 CA CA002105084A patent/CA2105084C/en not_active Expired - Lifetime
- 1992-07-23 AT AT92916264T patent/ATE130076T1/en active
- 1992-07-23 JP JP50571193A patent/JP3179490B2/en not_active Expired - Lifetime
- 1992-07-23 ES ES92916264T patent/ES2079199T3/en not_active Expired - Lifetime
- 1992-07-23 EP EP92916264A patent/EP0604445B1/en not_active Expired - Lifetime
- 1992-07-23 DE DE59204279T patent/DE59204279D1/en not_active Expired - Lifetime
- 1992-07-23 WO PCT/EP1992/001679 patent/WO1993006374A1/en active IP Right Grant
- 1992-07-23 AU AU23499/92A patent/AU2349992A/en not_active Abandoned
-
1993
- 1993-05-19 FI FI932305A patent/FI932305A/en unknown
-
1994
- 1994-03-18 NO NO940988A patent/NO302434B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ES2079199T3 (en) | 1996-01-01 |
| NO940988L (en) | 1994-03-18 |
| EP0604445B1 (en) | 1995-11-08 |
| JP3179490B2 (en) | 2001-06-25 |
| FI932305A0 (en) | 1993-05-19 |
| DE59204279D1 (en) | 1995-12-14 |
| AU2349992A (en) | 1993-04-27 |
| NO940988D0 (en) | 1994-03-18 |
| NO302434B1 (en) | 1998-03-02 |
| CA2105084A1 (en) | 1993-03-22 |
| FI932305A (en) | 1993-05-19 |
| WO1993006374A1 (en) | 1993-04-01 |
| JPH06510839A (en) | 1994-12-01 |
| ATE130076T1 (en) | 1995-11-15 |
| EP0604445A1 (en) | 1994-07-06 |
| DE4131524A1 (en) | 1993-04-01 |
| DK0604445T3 (en) | 1996-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |