CN104358718A - Piston accumulator - Google Patents

Piston accumulator Download PDF

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Publication number
CN104358718A
CN104358718A CN201410651483.1A CN201410651483A CN104358718A CN 104358718 A CN104358718 A CN 104358718A CN 201410651483 A CN201410651483 A CN 201410651483A CN 104358718 A CN104358718 A CN 104358718A
Authority
CN
China
Prior art keywords
piston
cylinder
seal ring
radial
thrust
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
Application number
CN201410651483.1A
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Chinese (zh)
Other versions
CN104358718B (en
Inventor
顾根泉
王亚辉
张全民
李海文
王海军
裴绍光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Henan Pinggao Electric Co Ltd
Original Assignee
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Henan Pinggao Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Pinggao Group Co Ltd, Henan Pinggao Electric Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201410651483.1A priority Critical patent/CN104358718B/en
Publication of CN104358718A publication Critical patent/CN104358718A/en
Application granted granted Critical
Publication of CN104358718B publication Critical patent/CN104358718B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • F15B1/04Accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • F15B1/04Accumulators
    • F15B1/08Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00Accumulators
    • F15B2201/30Accumulator separating means
    • F15B2201/31Accumulator separating means having rigid separating means, e.g. pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00Accumulators
    • F15B2201/30Accumulator separating means
    • F15B2201/31Accumulator separating means having rigid separating means, e.g. pistons
    • F15B2201/312Sealings therefor, e.g. piston rings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00Accumulators
    • F15B2201/40Constructional details of accumulators not otherwise provided for

Abstract

The invention provides a piston accumulator which comprises a cylinder body, wherein the cylinder body is internally provided with a piston; the front end of the cylinder body is provided with a front end cover structure; the front end cover structure comprises a top pressing block movably penetrating in the front port of the cylinder body along the front-and-back direction and a thrust block fixedly assembled at the front end of the cylinder body; a corresponding cavity in the cylinder body is defined by the piston, the inner wall of the cylinder body and the top pressing block; the front end cover structure and the inner wall of the cylinder body are hermetically assembled by virtue of an end face sealing piece positioned and clamped between the top pressing block and the thrust block; the end face sealing piece is provided with a radial peripheral face which is in sealed press fit with the inner wall of the cylinder body; the top pressing block is provided with a front top pressing face which is in press fit with the rear end face of the end face sealing piece; the thrust block is provided with a rearward thrust face which is in thrust fit with the front end face of the end face sealing piece; high-pressure fluid in the corresponding cavity acts on the top pressing block and the end face sealing piece is pressed so as to realize end face seal, so that the sealing property is more reliable.

Description

A kind of piston accumulator
Technical field
The present invention relates to a kind of piston accumulator.
Background technique
In ultrahigh pressure, breaker in extra high voltage, multiselect hydraulic actuating mechanism, the actuating mode of hydraulic actuating mechanism is that normal high pressure keeps, snap action, this carrys out the energy needed for long-time storage actuating with regard to needs energy-storage travelling wave tube, stored energy form has two kinds, and one adopts Compress Spring energy storage, and another kind adopts pressurized gas energy storage, the mode of Compress Spring energy storage also exists spring is produced creep for a long time possibility by compression, and the mode of pressurized gas energy storage also exists the possibility of Leakage Gas.To the hydraulic actuating mechanism mode adopting pressurized gas energy storage at present of large operating work more.
The accumulator of the pressurized gas energy storage that hydraulic system is commonly used is different from the mode of gas barrier according to hydraulic oil, there are gasbag isolation formula and isolated two kinds of piston, for ensureing the operation requirements of circuit breaker, accumulator in hydraulic actuating mechanism often need be filled with the pressurized gas of certain pressure in advance, to improve its working efficiency, so piston separated accumulator need be adopted.
If Authorization Notice No. is disclose a kind of piston accumulator in the Chinese invention patent specification of CN100376807C, it comprises the cylinder body extended along the vertical direction, the upper and lower two ends of cylinder body are respectively fitted with, lower end cap, the sealing that two two end cap realize itself and cylinder body respectively by the mode of radial seal is assembled, in cylinder body, move back and forth sealing be along the vertical direction equipped with piston, inner chamber of cylinder block is divided into the air cavity being positioned at top and the oil cylinder being positioned at below by piston, upper end cap is provided with the gas charging valve be communicated with air cavity for being filled with pressurized gas in air cavity, lower end cap is provided with and is communicated with the oil inlet hole to injection liquid force feed in oil pocket with oil pocket.During use, pressurized gas are injected air cavity, then to injection liquid force feed in oil pocket, along with oil pressure in oil pocket raises, promote piston and move to upper end cap one side, gas pressurized air pressure becomes large, until reach new balance, realizes accumulation of energy.When hydraulic actuating mechanism works, hydraulic oil discharges pushing mechanical device acting, high pressure gas expansion, promotes piston and moves, keep the working pressure of hydraulic system.
In above-mentioned piston accumulator, the end cap corresponding with air cavity is directly fixedly assembled together with cylinder body by set screw, and between corresponding end cap and cylinder body, is provided with radial direction seal ring assembles with the sealing realizing corresponding end cap.But this radial direction seal ring mainly relies on radial direction seal ring self to push up and is pressed on inboard wall of cylinder block to form sealing, this sealing configuration is when running into pressurized gas, easily impacted by pressurized gas, radial direction seal ring and inboard wall of cylinder block form gap, and then cause seal failure, affect the normal sealing to end cap.
Summary of the invention
The invention provides a kind of piston accumulator, relying on radial direction seal ring self to push up to be pressed in seal failure easily appears in the sealing configuration that inboard wall of cylinder block is formed technical problem when running into pressurized gas to solve in prior art.
The technological scheme of piston accumulator provided by the present invention is: piston accumulator, comprise the cylinder body extended along the longitudinal direction, move back and forth along the longitudinal direction in cylinder body and be equipped with piston, cylinder body front end is equipped with front cover structure, described front cover structure comprises movement along the longitudinal direction and is installed on the top briquetting at cylinder body front port place and is fixedly assemblied in the thrust block of cylinder body front end, described piston, inboard wall of cylinder block and described top briquetting surround the respective cavities in cylinder body, front cover structure is contained in edge face sealing member between described top briquetting and thrust block and inboard wall of cylinder block by locating clip and seals and assemble, edge face sealing member has the outer radial periphery face with the press fit of inboard wall of cylinder block sealing top, top briquetting have forward with the top pressure surface of the ear end face top press fit of edge face sealing member, described thrust block has the thrust surface coordinated with the front-end face thrust of edge face sealing member backwards.
The front portion of described top briquetting is provided with the boss extended forward, boss has outer radial periphery face and step surface forward, the step surface of boss is the top pressure surface of described top briquetting, described edge face sealing member is the end-face seal ring that setting sleeve is contained on boss, and the inner peripheral surface of the endoporus of end-face seal ring is corresponding with the outer radial periphery face of described boss fits.
Described thrust block is provided with the through hole extended along the longitudinal direction, and the front end of described boss extends forwardly to the inserting that to coincide in the through hole of thrust block and with the inner hole wall of through hole.
Described end-face seal ring comprises primary seal circle, inside and outside radially the distributing of primary seal circle both sides respectively correspondence be furnished with two the first back-up rings, be also furnished with the second back-up ring at the radially inner side of the first back-up ring of inner side.
Inner chamber of cylinder block is divided into oil pocket and air cavity by described piston, air cavity is positioned at the front of oil pocket, the described respective cavities surrounded by piston, inboard wall of cylinder block and described top briquetting is described air cavity, and described front cover structure is provided with the air-supported structure be communicated with described air cavity.
On the outer circumferential face of described piston, coaxial sleeve is equipped with the radial direction seal ring coordinated with cylinder body hydrodynamic reciprocating sealing, piston is provided with the thrust surface that coordinate spacing with described radial direction seal ring thrust in described radial direction seal ring rear, be furnished with in described radial direction seal ring front the stage clip extended along the longitudinal direction in described cylinder body, top, stage clip front end is pressed on fixing spring seat, fixing spring seat is at fore-and-aft direction and described piston orientation assemble, stage clip rear end is pushed up to press-fit and is fitted on the movable spring seat of guiding movement along the longitudinal direction, the rear end of movable spring seat to have under the effect of stage clip backward radial direction seal ring described in pushing tow to coordinate the pushing tow face of locating and clamping described radial direction seal ring with described thrust surface.
The leading flank of described piston is convexly equipped with the guiding attachment post extended forward along the longitudinal direction, described movable spring seat guiding movement is sleeved on described guiding attachment post, described fixing spring cover for seat is contained on described guiding attachment post, is provided with the collar realizing described fixing spring seat and piston orientation assemble in the longitudinal direction between fixing spring seat and guiding attachment post.
Described radial direction seal ring comprises the multiple seal washers superposing successively along the longitudinal direction and be sleeved on described piston.
The invention has the beneficial effects as follows: in piston accumulator provided by the present invention, high-pressure liquid in the respective cavities surrounded by thrust block, piston and cylinder body applies top pressure active force forward to top briquetting, thrust block is directly fixedly installed on cylinder body front end, make edge face sealing member by pushing up briquetting and thrust block is fixedly clamped, the outer circumferential face of edge face sealing member and inboard wall of cylinder block seal and assemble, and the sealing finally realizing front cover structure and cylinder body is assembled.Because end face seal collar member provided by the present invention is held out against by the top briquetting that the high-pressure liquid top of respective cavities is pressed, pressure in high-pressure liquid in respective cavities is higher, the sealing effect of end-face seal ring is also better, there will not be the problem causing seal failure because hydrodynamic pressure is too high, sealability is more reliable.
Further, edge face sealing member adopts the structure of end-face seal ring, and be sleeved on boss by end-face seal ring correspondence, end-face seal ring location and installation more for convenience.
Further, fixing spring seat in the longitudinal direction with piston orientation assemble, by the positioning action of fixing spring seat, stage clip pushes up pressure movable spring seat backward, thrust surface forward on the pushing tow face backward of movable spring seat and piston coordinates and realizes clamping the location of radial direction seal ring, after radial direction seal ring is worn, movable spring seat can push up pressure radial direction seal ring, radial direction seal ring is impelled to carry out compression compensation, ensure its sealability, and, by selecting suitable stage clip, movable spring seat can be adjusted to the top pressure active force that radial direction seal ring applies, the decrement of radial direction seal ring can be controlled, under the prerequisite ensureing sealability, frictional force can be effectively reduced, ensure normal movement and the speed of response of piston, so, just effectively expand the range of choice of radial direction seal ring, reduce the choice criteria of radial direction seal ring, what decrease seal piston apparatus designs and produces cost.Further, stage clip is by fixing spring seat together with Piston assembling, and after selected stage clip, the decrement of stage clip self changes not quite in piston reciprocating moving process, effectively can extend the working life of stage clip.
Further, the leading flank of piston is convexly equipped with guiding attachment post, realized the guiding guiding of movable spring seat and the axially locating to fixing spring seat by this this guiding attachment post, project organization is simple, is convenient to processing and fabricating and assembling.
Accompanying drawing explanation
Fig. 1 is the structural representation being provided with the accumulator of seal piston apparatus provided by the present invention;
Fig. 2 is A place enlarged view in Fig. 1;
Fig. 3 is B place enlarged view in Fig. 1.
Embodiment
As shown in Figure 1 to Figure 3, a kind of embodiment being provided with the accumulator of seal piston apparatus, accumulator in this embodiment comprises the cylinder body 3 extended along the longitudinal direction, packed-piston structure is provided with in cylinder body 3, packed-piston structure comprises movement along the longitudinal direction and is assemblied in the piston 2 inner chamber of cylinder block being divided into oil pocket 30 and air cavity 11 in cylinder body 3, on the outer circumferential face of piston 2, coaxial sleeve is equipped with the radial direction seal ring 32 coordinated with cylinder body 3 hydrodynamic reciprocating sealing, piston 2 is provided with the thrust surface that coordinate spacing with the thrust of described radial direction seal ring 32 in described radial direction seal ring 32 rear, in the present embodiment, the leading flank of piston 2 is convexly equipped with the guiding attachment post 31 extended forward along the longitudinal direction, guiding attachment post 31 is set with the stage clip 14 extended along the longitudinal direction, top, stage clip 14 front end is pressed on fixing spring seat 13, fixing spring seat 13 passes through collar 12 and guiding attachment post 31 orientation assemble at fore-and-aft direction, and top, stage clip 14 rear end press-fits and fits on the movable spring seat 15 of guiding movement along the longitudinal direction, movable spring seat 15 guiding movement is sleeved on described guiding attachment post, movable spring seat 15 is provided with the stage clip pilot hole be sleeved on described stage clip 14 extended back by front-end face, the rear end of described stage clip 14 coordinates with pushing tow at the bottom of the hole of described stage clip pilot hole, the radial dimension of the outer circumferential face of movable spring seat 15 is less than the radial dimension of described radial direction seal ring herein, the outer circumferential face of movable spring seat 15 front portion is in the cone structure diminished gradually by backward front radial dimension, the rear end of movable spring seat 15 to have under the effect of stage clip 14 backward radial direction seal ring 32 described in pushing tow to coordinate the pushing tow face of locating and clamping described radial direction seal ring 32 with described thrust surface.
In the present embodiment, the leading flank of piston 2 is provided with step surface positioning step forward, and described radial direction seal ring 32 coaxial positioning is sleeved on described positioning step, and the step surface of this positioning step is described thrust surface.
Radial direction seal ring in the present embodiment comprises along superposing the multiple seal washers be sleeved on described piston along the longitudinal direction successively, multiple seal washers herein specifically comprise interlaced the first seal washer 17 and the second seal washer 19 be superimposed, and in the both sides up and down of first, second seal washer, also correspondence is provided with the 3rd seal washer 20 and the 4th seal washer 18.
In the present embodiment, the air cavity 11 separated by piston 2 is positioned at the front of oil pocket 30, the rear and front end correspondence sealing of cylinder body 3 is equipped with front cover structure and rear end cover structure, front cover structure is provided with the air-supported structure for inflating to described air cavity, and rear end cover structure 16 is provided with for the oil transportation hole to oiling in described oil pocket.
Front cover structure herein comprises movement along the longitudinal direction and is installed on the top briquetting 7 at cylinder body front port place and is fixedly assemblied in the thrust block 6 of cylinder body front end, top briquetting 7, piston 2 and inboard wall of cylinder block surround described air cavity 11, thrust block 6 is provided with the through hole 61 extended along the longitudinal direction, through hole 61 is ladder surface shoulder hole backwards, the front portion of top briquetting 7 is provided with the boss 71 extended forward, boss 71 has outer circumferential face and the step surface forward of the inserting that to coincide with the path section of described through hole, the step surface of described boss 71, the outer circumferential face of boss, the ladder surface of shoulder hole and the inner peripheral surface of cylinder body 3 surround groove structure, the end-face seal ring as edge face sealing member is accommodated in groove structure, end face, seal ring setting sleeve is contained on described boss, the step surface of boss 71 is the top pressure surface forward of top briquetting 7, the ladder surface of shoulder hole is the thrust surface backwards of thrust block 6, the thrust surface of thrust block 7 coordinates with the front-end face thrust of edge face sealing member, the top pressure surface pushing up briquetting then with the ear end face top press fit of edge face sealing member, top briquetting and thrust block coordinate realization gripping edge face sealing member, and end-face seal ring has the outer radial periphery face with the press fit of inboard wall of cylinder block sealing top, front cover structure is assembled by end-face seal ring and cylinder body seal.Herein, the air-supported structure be arranged on the briquetting of described top comprises the vent be arranged at along the longitudinal direction on the briquetting of described top, vent comprises the front extension diameter section arranged successively along the longitudinal direction, middle necking segment and rear extension diameter section, housing screw 10 and sealed steel ball 5 is disposed with along the longitudinal direction in front extension diameter section, be provided with inflation one-way valve 4 at the open rearward end place of rear extension diameter section, also add spiral plug 9 at the front port place of front extension diameter section.
Specifically, end-face seal ring herein comprises primary seal circle 23, inside and outside radially the distributing of primary seal circle 23 both sides respectively correspondence be furnished with two the first back-up rings 21, and be also furnished with the second back-up ring 22 in the inner side of the first back-up ring 21 of inner side.
During concrete use, in air cavity 11, high pressure nitrogen is washed away by air-supported structure, high pressure nitrogen belongs to inert gas, other gases or moisture content can be avoided the corrosion of inner components, high pressure nitrogen is encapsulated in air cavity 11, high pressure nitrogen acts on the briquetting 7 of top, and top briquetting 7 compresses forward end-face seal ring and assembles with the sealing realizing front cover structure and cylinder body.After shutoff main gas charge structure, in oil pocket 30, high pressure oil is inputted by the oil transportation hole on rear end cover structure 16 by high pressure oil pump, promote piston 2 to move forward, compression high pressure nitrogen carrys out stored energy, after reaching setting pressure, high pressure oil pump stops suppressing, high pressure oil applies active force on the piston 2 and keeps balancing with high pressure nitrogen reality active force on the piston 2, when hydraulic actuating mechanism action, hydraulic oil discharges pushing mechanical device acting, high pressure nitrogen expands, and by piston action in hydraulic system, still can keep the working pressure of hydraulic system.
In the present embodiment, to be compressed by movable spring seat 15 by stage clip 14 due to radial direction seal ring and control its decrement by stage clip 14, the frictional force of radial direction seal ring is made to keep stable, and, movable spring seat 15 is made to compress radial direction seal ring by stage clip 14, the compensation of the radial direction seal ring after to wearing and tearing can be realized like this, thus effectively can ensure the sealability of radial direction seal ring.
In the present embodiment, input pressurized gas by air-supported structure in air cavity, these pressurized gas will act on the briquetting of top, realize the location to top briquetting, meanwhile, remained top briquetting applied pressure by pressurized gas, make the sealability of end-face seal ring more reliable.
In above-described embodiment, edge face sealing member adopts the end-face seal ring be sleeved on boss, and in other embodiments, edge face sealing member also can adopt gasket seal, and now, gasket seal is by pushing up briquetting and thrust block clamping and positioning.Further, air-supported structure can be opened in front cover structure equally, now, need gasket seal with top briquetting air-filled pore corresponding position offer corresponding through hole, guarantee normally inflate.
In above-described embodiment, surround air cavity by top briquetting, piston and inboard wall of cylinder block, the pressurized gas in air cavity act on the briquetting of top to realize pressing solidly the top of end-face seal ring determining.In other embodiments, also can surround oil pocket by top briquetting, piston and inboard wall of cylinder block, now, can be acted on by the high pressure oil in oil pocket to realize pressing solidly the top of end-face seal ring determining on the briquetting of top, the sealing effect of guarantee seal ring.
In above-described embodiment, end-face seal ring adopts multiple seal ring to combine formation, and in other embodiments, end-face seal ring also can adopt the seal ring of single guarantee sealing effect.
In above-described embodiment, the orientation assemble of fixing spring seat and piston is realized by guiding attachment post, in other embodiments, also can by other means or structure realize the orientation assemble of fixing spring seat and piston as being directly assemblied on piston by screw-tightened linkage structure by fixing spring seat.
In above-described embodiment, radial direction seal ring adopts multiple seal washer arranged successively along the longitudinal direction to combine, and can select seal washer that is dissimilar, size so as required, meet sealability requirement.

Claims (8)

1. piston accumulator, comprise the cylinder body extended along the longitudinal direction, move back and forth along the longitudinal direction in cylinder body and be equipped with piston, cylinder body front end is equipped with front cover structure, it is characterized in that: described front cover structure comprises movement along the longitudinal direction and is installed on the top briquetting at cylinder body front port place and is fixedly assemblied in the thrust block of cylinder body front end, described piston, inboard wall of cylinder block and described top briquetting surround the respective cavities in cylinder body, front cover structure is contained in edge face sealing member between described top briquetting and thrust block and inboard wall of cylinder block by locating clip and seals and assemble, edge face sealing member has the outer radial periphery face with the press fit of inboard wall of cylinder block sealing top, top briquetting have forward with the top pressure surface of the ear end face top press fit of edge face sealing member, described thrust block has the thrust surface coordinated with the front-end face thrust of edge face sealing member backwards.
2. piston accumulator according to claim 1, it is characterized in that: the front portion of described top briquetting is provided with the boss extended forward, boss has outer radial periphery face and step surface forward, the step surface of boss is the top pressure surface of described top briquetting, described edge face sealing member is the end-face seal ring that setting sleeve is contained on boss, and the inner peripheral surface of the endoporus of end-face seal ring is corresponding with the outer radial periphery face of described boss fits.
3. piston accumulator according to claim 2, is characterized in that: described thrust block is provided with the through hole extended along the longitudinal direction, and the front end of described boss extends forwardly to the inserting that to coincide in the through hole of thrust block and with the inner hole wall of through hole.
4. piston accumulator according to claim 2, it is characterized in that: described end-face seal ring comprises primary seal circle, inside and outside radially the distributing of primary seal circle both sides respectively correspondence be furnished with two the first back-up rings, be also furnished with the second back-up ring at the radially inner side of the first back-up ring of inner side.
5. piston accumulator as claimed in any of claims 1 to 4, it is characterized in that: inner chamber of cylinder block is divided into oil pocket and air cavity by described piston, air cavity is positioned at the front of oil pocket, the described respective cavities surrounded by piston, inboard wall of cylinder block and described top briquetting is described air cavity, and described front cover structure is provided with the air-supported structure be communicated with described air cavity.
6. piston accumulator according to claim 5, it is characterized in that: on the outer circumferential face of described piston, coaxial sleeve is equipped with the radial direction seal ring coordinated with cylinder body hydrodynamic reciprocating sealing, piston is provided with the thrust surface that coordinate spacing with described radial direction seal ring thrust in described radial direction seal ring rear, be furnished with in described radial direction seal ring front the stage clip extended along the longitudinal direction in described cylinder body, top, stage clip front end is pressed on fixing spring seat, fixing spring seat is at fore-and-aft direction and described piston orientation assemble, stage clip rear end is pushed up to press-fit and is fitted on the movable spring seat of guiding movement along the longitudinal direction, the rear end of movable spring seat to have under the effect of stage clip backward radial direction seal ring described in pushing tow to coordinate the pushing tow face of locating and clamping described radial direction seal ring with described thrust surface.
7. piston accumulator according to claim 6, it is characterized in that: the leading flank of described piston is convexly equipped with the guiding attachment post extended forward along the longitudinal direction, described movable spring seat guiding movement is sleeved on described guiding attachment post, described fixing spring cover for seat is contained on described guiding attachment post, is provided with the collar realizing described fixing spring seat and piston orientation assemble in the longitudinal direction between fixing spring seat and guiding attachment post.
8. piston accumulator according to claim 6, is characterized in that: described radial direction seal ring comprises the multiple seal washers superposing successively along the longitudinal direction and be sleeved on described piston.
CN201410651483.1A 2014-11-17 2014-11-17 A kind of piston accumulator Active CN104358718B (en)

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Application Number Priority Date Filing Date Title
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CN104358718B CN104358718B (en) 2016-11-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113217482A (en) * 2021-04-09 2021-08-06 燕山大学 Piston type energy accumulator with built-in one-way valve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019407A1 (en) * 1970-04-22 1971-11-04 Baumgarten Hydrotech Separating piston for hydropneumatic energy storage
DE2222416A1 (en) * 1972-05-06 1973-11-08 Kessler Nabenfab Alfing HYDROPNEUMATIC ACCUMULATOR
CN102182714A (en) * 2011-06-08 2011-09-14 何学才 Gas and oil non-isolated mixed type piston energy accumulator
CN202194870U (en) * 2011-06-28 2012-04-18 四川金星石油化工机械设备有限公司 Piston accumulator
CN202707642U (en) * 2012-08-06 2013-01-30 奉化市朝日液压有限公司 Adjustable travel piston type energy accumulator
CN204327604U (en) * 2014-11-17 2015-05-13 河南平高电气股份有限公司 Piston accumulator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019407A1 (en) * 1970-04-22 1971-11-04 Baumgarten Hydrotech Separating piston for hydropneumatic energy storage
DE2222416A1 (en) * 1972-05-06 1973-11-08 Kessler Nabenfab Alfing HYDROPNEUMATIC ACCUMULATOR
CN102182714A (en) * 2011-06-08 2011-09-14 何学才 Gas and oil non-isolated mixed type piston energy accumulator
CN202194870U (en) * 2011-06-28 2012-04-18 四川金星石油化工机械设备有限公司 Piston accumulator
CN202707642U (en) * 2012-08-06 2013-01-30 奉化市朝日液压有限公司 Adjustable travel piston type energy accumulator
CN204327604U (en) * 2014-11-17 2015-05-13 河南平高电气股份有限公司 Piston accumulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113217482A (en) * 2021-04-09 2021-08-06 燕山大学 Piston type energy accumulator with built-in one-way valve

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