CN111473005B - Interlayer cavity type hydraulic bag and energy accumulator with same - Google Patents
Interlayer cavity type hydraulic bag and energy accumulator with same Download PDFInfo
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- CN111473005B CN111473005B CN202010305911.0A CN202010305911A CN111473005B CN 111473005 B CN111473005 B CN 111473005B CN 202010305911 A CN202010305911 A CN 202010305911A CN 111473005 B CN111473005 B CN 111473005B
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- 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
- F15B1/106—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means characterised by the way housing components are assembled
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- 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
- F15B1/125—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery characterised by the attachment means
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- 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
- F15B1/22—Liquid port constructions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
- F16F9/082—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall characterised by the hydropneumatic accumulator
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
Abstract
The invention discloses an interlayer cavity type hydraulic bag and an energy accumulator with the same, comprising a bag body, a bag tube, an interlayer cavity, a central cavity and a sealer, wherein the bag tube is an elastic rubber hose with a fiber knitting enhancement layer in the tube wall, and the interlayer cavity is a cylindrical cavity with an annular cross section surrounded by an interlayer between an inner bag tube and an outer bag tube; the central cavity is a cavity surrounded by the inner bag tube, is positioned in the center of the bag body and is surrounded by the interlayer cavity, and the sealer locks and seals the opening at the end part of the bag tube. The interlayer cavity type hydraulic bag can generate radial inward compression force for objects in the central cavity of the interlayer cavity type hydraulic bag, the radial inward compression force is uniformly distributed on the annular surface by 360 degrees, and the energy accumulator using the interlayer cavity type hydraulic bag can obviously reduce the pressure bearing burden of pressure-bearing parts such as a shell and the like, and improve the reliability and the durability of the energy accumulator. The flexible body energy accumulator with the interlayer cavity type hydraulic bag as the main body can be used as a flexible tension spring to replace a metal tension spring and an elastic rope to be applied to a mechanical device, and the tension and length expansion range can be adjusted on line through hydraulic pressure and air pressure.
Description
Technical Field
The invention relates to a hydraulic bag and an energy accumulator with the same, in particular to a sandwich cavity type hydraulic bag and an energy accumulator with the same, belonging to the technical field of fluid pressure energy application.
Background
The hydraulic bag is a hydraulic device with a flexible cavity structure, the bag wall enclosing the cavity is usually made of an elastic rubber material composite fiber reinforced layer, so that the bag body has a larger expansion deformation amount, and can bear the internal and external pressure difference generated by internal fluid, the volume transformation ratio is usually more than two times, and the minimum burst pressure is not less than 10 MPa. It differs from hydraulic hoses used for conveying media and conducting pressure in that a hydraulic bladder is mainly used as an actuator in a hydraulic system, and the conversion between pressure energy and mechanical energy is realized by the expansion and contraction deformation of a bladder body, so that the hydraulic bladder allows a larger amount of volume deformation than the hydraulic hose. In some specific application occasions, the flexible hydraulic bag can be used for replacing a rigid hydraulic cylinder, and the advantages of small volume, light weight, flexible use and the like can be exerted.
The hydraulic bags in the prior art can be divided into two types according to the action form of mechanical force: one is an expansion force bag, namely, various internal pressure expansion machines, expansion devices, hole packers and the like driven by oil pressure or water pressure generate outward thrust through radial expansion of a bag body; another type is a tension balloon, i.e., a balloon that is pulled inward by axial contraction of a reticular fiber layer in the wall of the balloon as the tubular balloon expands.
The application number is 201320517862.2, and the publication number is CN 203725576U's Chinese patent document, discloses a hydraulic bulging die machine, and it states "this scheme adopts the elastic expansion utricule to combine together with hydraulic bulging technique as the mold core of lower mould, has simple structure, and the technology degree of difficulty is low, can accomplish the hydraulic bulging function on current hydraulic press. "
Chinese patent application No. 2019109323364, published under No. CN110566533A, discloses a tubular hydraulic bladder and a pressure generating device, and the specification states that "a hydraulic line injects pressure fluid into the bladder body through a bladder nozzle to radially expand the bladder body, and the rigidity of the bladder body is changed from a soft flat band tube shape to a cylindrical shape with increased rigidity, thereby applying work to the external machine. "
The Chinese patent document with the application number of 2013103086118 and the application publication number of CN103395072A discloses an artificial muscle, and the description states that' when in work, under the action of water pressure, an elastic rubber tube and a high-strength fiber woven net deform, so that the diameter of the hydraulic artificial muscle is increased, the length of the hydraulic artificial muscle is reduced, and further, a tension effect is generated on a driving object connected with a threaded blind hole of a closed-end joint. "
The two types of hydraulic bladders described above present at least two problems: firstly, only expansion force or pulling force can be generated outwards, and a single hydraulic bag cannot directly generate compression force on an external object, which is determined by the single-cavity structure of the hydraulic bag; secondly, when the pressure of the fluid in the bag is high, the edge of the metal sleeve for locking the bag opening is expanded by the huge tension generated by the radial expansion of the end part of the bag pipe, so that the bell-mouth-shaped plastic deformation is generated. The two problems can be solved by breaking through the traditional single-cavity capsule body structure, for example, the sandwich cavity capsule body structure is adopted, and the technical scheme is not disclosed at present.
There are many possible practical applications of hydraulic bladders that can directly convert fluid pressure into compressive force, such as radial compression molding of materials, or filter pressing and extraction of materials to achieve solid-liquid separation, and one application is to improve bladder accumulators. According to the expression of the current national standard document GB/T20663-2017 in China, the energy accumulator is a container which utilizes the compressibility of gas and uses the gas pressure in an air cavity to pressurize liquid at a liquid end. "bladder accumulator consists essentially of a shell and a bladder, with liquid and gas separated by a flexible bladder. "it is well known to those skilled in the art that in conventional bladder accumulators, fluid is stored in the space outside the air chamber capsule in the housing, and the fluid pressure acts directly on the housing and other pressure-receiving devices, which can accelerate fatigue and reduce life or even directly fail when high peak pressure fluctuations occur in the hydraulic circuit.
Disclosure of Invention
The present invention is directed to solving the above problems and to providing a sandwich chamber type hydraulic bladder and an accumulator having the same.
The invention realizes the purpose through the following technical scheme: a sandwich cavity type hydraulic bag comprises a bag body, wherein the bag body comprises a bag tube, a sandwich cavity, a central cavity and a sealer; the capsule tube is a flexible tubular object with an elastic rubber layer in the tube wall, two sections of capsule tubes are sleeved inside and outside and are respectively an inner capsule tube and an outer capsule tube, and a mesh tube-shaped woven fiber reinforced layer is arranged in at least one section of tube wall;
the interlayer cavity is formed by an interlayer between the inner bag tube and the outer bag tube, the shape of the interlayer cavity is a cylindrical space with an annular cross section, and the interlayer cavity is used for accommodating injected liquid pressure medium; the cavity at the central axis of the balloon body is a central cavity surrounded by an inner balloon tube, which is surrounded by the interlayer cavity and separates them by the inner balloon tube;
the sealing connector is a group of rigid assembly parts and comprises a core body and a sleeve body, wherein the center of the sleeve body is provided with a mounting hole in which the core body can be sleeved, and the sleeve body and the core body are assembled and locked with an opening at the end part of the sealed bag tube; the sealing connector is internally provided with a pore passage for the liquid pressure medium to enter and exit the interlayer cavity, and the outer part of the sealing connector is provided with a mounting clamping groove or a thread;
when the pressure intensity or the injection amount of the fluid in the interlayer cavity is actively changed, acting forces such as compression, ejection, traction, stretching and the like are simultaneously generated on objects in the central cavity and outside the bag body through the expansion and contraction deformation of the bag tube and the change of the tube wall tension, and on the contrary, the pressure intensity or the volume of the fluid in the interlayer cavity can be correspondingly changed through applying external force to the bag body from the outside or the central cavity.
As a still further scheme of the invention: the base material of the elastic rubber layer of the capsule tube is one or a combination of more of polyurethane elastomer, natural rubber, nitrile rubber, butyl rubber, chloroprene rubber, silicon rubber, fluororubber and ethylene propylene diene monomer.
As a still further scheme of the invention: the fibers of the capsule tube fiber reinforced layer are mainly high-strength high-modulus fibers, namely any one or combination of more of aramid fibers, ultra-high molecular weight polyethylene fibers and carbon fibers, and the ratio of the high-strength high-modulus fibers to the total weight of the fibers is not less than 60%.
As a still further scheme of the invention: the interlayer cavity type hydraulic bag can be divided into two types, i type and ii type, according to the difference of the bag body structure. In the I-type interlayer cavity type hydraulic bag, an inner bag tube and an outer bag tube which enclose an interlayer cavity are formed by folding the same continuous bag tube in a segmented inner-outer turning sleeve manner, at least one end of the bag body is an annular blind end formed by a transition part of the inner bag tube and the outer bag tube, a sealing connector is arranged at the other end of the bag body or the middle section of the bag body, and the annular center of the blind end is an opening part of the central cavity; in the II-type interlayer cavity type hydraulic bag, an inner bag tube and an outer bag tube which enclose the interlayer cavity belong to two independent bag tubes, the two sealing devices are respectively assembled at two ends of the bag body, an axial through hole is arranged in the core body of at least one sealing device, and the axial through hole is communicated with the central cavity.
An energy accumulator with an interlayer cavity type hydraulic bag comprises the bag type energy accumulator and an I-type interlayer cavity type hydraulic bag, wherein the bag type energy accumulator comprises a shell, an air bag, a liquid end valve seat and an inflation valve. The interlayer cavity bag body of the hydraulic bag is arranged in the shell of the energy accumulator, and the compression air bag of the energy accumulator is arranged in the central cavity from the opening at the center of the blind end of the hydraulic bag and is surrounded by the inner bag tube; the sealer is installed in a liquid end valve seat of the energy accumulator, wherein a pore passage for liquid to enter and exit the interlayer cavity is communicated with a port of the liquid valve.
An energy accumulator with a sandwich cavity type hydraulic bag comprises an inflation valve and a II-type sandwich cavity type hydraulic bag. The inflation valve is arranged in an axial through hole in the core body of the sealing connector at one end of the bag body, and a central cavity in the bag body is an air cavity for storing compressed air. The accumulator is a flexible body hydraulic accumulator independent of a metal shell, can be installed in a hydraulic circuit, realizes absorption and compensation of hydraulic fluctuation in the connected circuit through pressure exchange of compressed gas in a central cavity and liquid in an interlayer cavity, and is particularly suitable for specific occasions with limited installation space or equipment weight reduction requirements; on the other hand, the capsule body can be used as a flexible tension spring to replace a metal tension spring and an elastic rope to be arranged in a mechanical device, so that the functions of tensioning, ejecting, damping, arresting and buffering and the like can be realized, and the most prominent advantage is that the stretching range of tension and length can be dynamically adjusted through hydraulic pressure and air pressure.
The invention has the beneficial effects that:
1. the interlayer cavity type hydraulic bag can generate radial inward compression force for an object arranged in the central cavity of the interlayer cavity type hydraulic bag, and can be uniformly distributed on the annular surface at 360 degrees, so that the interlayer cavity type hydraulic bag has a practical function which is not possessed by a common hydraulic bag;
2. the bag type energy accumulator improved by additionally arranging the interlayer cavity type hydraulic bag can obviously reduce the bearing load of pressure-bearing pieces such as a shell and the like and improve the reliability and the durability of the pressure-bearing pieces;
3. the flexible body energy accumulator taking the interlayer cavity type hydraulic bag as a main body can relieve the dependence of the traditional energy accumulator on a metal shell, and is more portable and flexible to use;
4. the flexible body energy accumulator with the interlayer cavity type hydraulic bag as the main body can be used as a flexible tension spring to replace a metal tension spring and an elastic rope to be applied to a mechanical device, and the tension and length expansion range can be adjusted on line through hydraulic pressure and air pressure.
The technical effects of the invention are described in the specification in addition to the above list, directly or indirectly.
Drawings
FIG. 1 is a schematic longitudinal sectional view of a sandwich chamber hydraulic bladder of the present invention, wherein a and b are shown before and after pressurization, respectively;
FIG. 2 is a schematic cross-sectional view of a sandwich chamber hydraulic bladder of the present invention;
FIG. 3 is a schematic diagram of a longitudinal cross-sectional view of a sandwich chamber hydraulic bladder configuration I of the present invention;
FIG. 4 is a schematic longitudinal sectional view of a sandwich cavity hydraulic bladder configuration II of the present invention;
FIG. 5 is a schematic structural view of an improved bladder accumulator of the present invention;
fig. 6 is a schematic structural diagram of the soft-bag type non-metallic accumulator of the present invention, wherein a and b are respectively before and after pressurization.
In the figure: 1. the energy accumulator comprises a capsule body, 2, a capsule tube, 21, an inner capsule tube, 22, an outer capsule tube, 23, a blind end, 3, a sandwich cavity, 4, a central cavity, 5, a sealer, 51, a core body, 52, a sleeve body, 53, an oil through hole, 54, an axial through hole, 61, an energy accumulator shell, 62, an air bag, 63, a liquid end valve seat, 64 and an inflation valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, the capsule body 1 of the interlayer cavity type hydraulic capsule provided by the invention comprises a capsule tube 2, an interlayer cavity 3, a central cavity 4 and a sealer 5; wherein, the capsule tube 2 is a flexible body with an elastic rubber layer in the tube wall, the shape is a thin-wall tube cylinder with two ends or one end opened, the rubber base material is made of synthetic rubber or thermoplastic elastomer material with the elongation at break more than 300 percent and the hardness between Shore A45-65, and the water permeability and the oil resistance of the base material are selected according to the property of a liquid medium in practical use. The bag tube 2 in the bag body 1 is divided into an inner bag tube 21 and an outer bag tube 22 which are nested inside and outside, the inner bag tube and the outer bag tube in the same bag body can be folded by the inner and outer turned sleeves of the same bag tube or can be two sections which are nested inside and outside, and the tube wall of the bag tube (at least the outer bag tube) is provided with a fiber reinforced layer which is woven in a net tube shape. The fiber net tube can be sleeved on the outer surface of the capsule tube and can also be compounded in the tube wall, and the fiber in the fiber reinforced layer is mainly made of high-strength high-modulus fiber materials such as aramid (1314 para-aramid fiber, PBO) fiber, ultra-high molecular weight polyethylene (UHMWPE) fiber or carbon fiber and the like. At present, many manufacturers at home and abroad manufacture the fiber braided tube by using a weaving process, the braided diameter of the product can be covered from several millimeters to several hundred millimeters, and the online weaving process of compounding the fiber braided tube with rubber and forming at one time is increasingly mature. The bag body 1 is provided with an interlayer cavity 3 enclosed by an interlayer between an inner bag tube 21 and an outer bag tube 22, the shape of the interlayer cavity 3 is a cylindrical cavity with an annular cross section, and the interlayer cavity contains injected liquid pressure medium; the cavity at the central axis of the balloon 1 is the central lumen 4, which is surrounded by the sandwiched lumen 3, with an inner balloon tube 21 separating them. The sealer 5 is a rigid assembly, and comprises a core 51 and a sleeve 52, which are usually made of metal material, the sleeve 52 has a mounting hole in the center for the core to be inserted, the sleeve 52 and the core 51 are assembled to lock the opening at the end of the sealed bag tube 2, the sealer 5 has a hole 53 for the liquid pressure medium to enter and exit the interlayer cavity, and has a mounting slot or screw thread on the outside (the screw thread is not shown in the figure).
In the embodiment of the i-shaped structure of the interlayer cavity type hydraulic bag provided by the invention, as shown in fig. 1 and 3, an inner bag tube 21 and an outer bag tube 22 of the interlayer cavity type hydraulic bag are formed by folding the same continuous bag tube in an inner-outer turning sleeve, the turning part is also a transition part connected with the tube walls of the inner bag tube and the outer bag tube, and the transition part forms an annular blind end 23 of the interlayer cavity 3, the center of the blind end 23 is also the opening of the central cavity 4, the bag body of the i-shaped structure only needs one sealer 5 to lock and seal the openings at two ends of the bag tube 2, the sealer 5 can be arranged at one end of the bag body as shown in fig. 1, and the other end is the blind end 23, or the sealer can be arranged at the middle section of the bag body as shown in fig. 3, namely, two blind ends 23 formed by folding the inner sleeve and the outer sleeve on the same bag tube, so that the sealer is integrally surrounded in the interlayer cavity 4 and one section of the inner bag tube 21. In practical application, an object to be compressed or tightened is placed in the central cavity in advance, when a liquid medium is injected into the interlayer cavity 3 in a pressurization mode, the annular space in the interlayer cavity 3 becomes thick and the volume is increased, the outer balloon expands radially and contracts axially, the inner balloon stretches axially and contracts radially, and meanwhile the pressure of the liquid medium in the interlayer cavity is transmitted to the object in the central cavity to be compressed radially. The huge compression force can be used for realizing multiple functions of workpiece pressing and shaping, material pressing and solid-liquid separation and the like on one hand; on the other hand, the sealer enclosed by the interlayer cavity 4 and the inner bag tube 21 can be protected, namely, the radial compression force applied to the periphery of the sleeve body 52 can be mostly counteracted by the expansion force generated by the expansion of the bag-locked tube, so that the risk of the 'bell mouth' plastic deformation of the pressure opening part is eliminated.
In the embodiment of the energy accumulator improved by the sandwich cavity type hydraulic bag with the I-type structure provided by the invention, as shown in fig. 5, the energy accumulator is a bag type energy accumulator which is provided with a shell 61, an air bag 62, a liquid end valve seat 63 and an inflation valve 64, during assembly, the non-inflated air bag 62 is placed into the central cavity 4 from an opening at the center of a bag body blind end 23, the whole except an inflation nozzle is wrapped by an inner bag tube 21 and is placed into the shell 61 from an opening at the liquid end of the shell, the sealer 5 is arranged on the liquid end valve seat 63 through a thread or a clamping groove, and the air nozzle of the air bag 62 and the inflation valve 64 are assembled and combined at the air end of the shell. The diameter and the length of the bag tube 2 of the interlayer cavity type hydraulic bag with the I-shaped structure are set according to the space size in the chamber of the shell 61, and the basic setting basis is as follows: before assembly, when the injection pressure of the free-state interlayer cavity hydraulic bag is equal to the nominal pressure of a circuit where the energy accumulator is located, the outer diameter and the length of the free-state interlayer cavity hydraulic bag in the expansion state are matched with the space in the bore of the shell 61. In practical application, when the hydraulic no-load air bag of the energy accumulator is filled with compressed nitrogen, the inner bag tube and the outer bag tube are radially expanded and attached together, the volume of the central cavity 4 is expanded to the maximum, and the volume of the interlayer cavity 3 is pressed to the minimum; when the energy accumulator is connected and communicated with a hydraulic loop, pressurized liquid is injected into the interlayer cavity 3, the pressure causes the inner bag tube 21 to contract radially, the outer bag tube 22 expands radially, the volume of the interlayer cavity 3 is increased, the outer surface of the outer bag tube 22 is close to the inner surface of the shell 61, the inner bag tube 21 compresses the air bag 62 and the internal nitrogen gas radially to reduce the volume and increase the pressure until the air pressure is increased to reach a state of balance with the hydraulic pressure; when the hydraulic pressure in the loop fluctuates, the diameters of the inner bag tube 21 and the air bag 62 can change in time in response to the change of the pressure difference at the two sides, and the new balance is achieved through the exchange of the hydraulic pressure energy of the air at the two sides, so that the effects of absorbing and compensating the pressure fluctuation are achieved. In the whole process, the liquid medium can not be in direct contact with the shell 61 all the time, and when the hydraulic pressure fluctuates, the outer bag tube 22 is always in a tensioning state close to the maximum expansion diameter, and the fiber reinforced layer is mainly high-strength high-modulus fiber with extremely small elastic elongation, so that the change of the tension along with the fluctuation of the internal pressure is reflected in the change of the outer diameter of the bag body 1 by a small amplitude, the stress of the shell 61 is obviously reduced under the influence of the fluctuation of the internal pressure, the pressure adaptation range of the energy accumulator is enlarged, and the service life of the energy accumulator is prolonged.
In the embodiment of the sandwich cavity type hydraulic bag II structure provided by the invention, as shown in fig. 4, the inner bag tube 21 and the outer bag tube 22 which enclose the sandwich cavity 4 belong to two independent bag tubes, two sealers 5 are respectively assembled at two ends of the bag body, an axial through hole 54 is arranged in the core body 51 of at least one sealer 5, the sealer 5 simultaneously locks and seals the ports of the inner bag tube and the outer bag tube, and the axial through hole 54 is communicated with the central cavity 4 in the inner bag tube 21.
In the embodiment of the soft-bag type non-metal energy accumulator provided by the invention, as shown in fig. 6, the soft-bag type non-metal energy accumulator comprises a sandwich-chamber type hydraulic bag with a type II structure and an inflation valve 64, wherein the inflation valve 64 is arranged in an axial through hole in a sealer core body 51 at one end of the bag body, a central chamber 4 which is integrally sealed in the bag body is an air chamber, compressed air can be filled in through the inflation valve, a sandwich chamber 3 which is wrapped on the periphery of the air chamber is a liquid chamber, and pressure liquid can enter and exit through an oil through hole 54 in the sealer. The flexible body energy accumulator is independent of a thick heavy metal shell, can be installed in a hydraulic circuit as a hydraulic energy accumulator in practical application, and realizes absorption and compensation of pressure fluctuation in the connected circuit through pressure exchange between compressed gas in a central cavity 4 and liquid in an interlayer cavity 3. The volume can be increased by prolonging the length of the bag tube, the occupied space can be reduced by bending and coiling the bag body, and the bag body can be protected by a hard plastic or thin-wall metal shell when necessary, so that the bag is particularly suitable for special occasions with limited installation space or equipment weight reduction requirements; on the other hand, the capsule is also a mechanical elastic potential energy accumulator, in practical application, the capsule can be used as a flexible tension spring to replace a metal tension spring and an elastic rope to be installed in a mechanical device, functions such as tensioning, ejection, shock absorption, arresting and buffering and the like can be realized, and the tensioning force and the length expansion range can be adjusted on line through hydraulic pressure and air pressure.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (6)
1. A sandwich chamber type hydraulic bladder, which comprises a bladder body (1); the method is characterized in that: the capsule body (1) comprises a capsule tube (2), an interlayer cavity (3), a central cavity (4) and a sealer (5); the bag tube (2) is a flexible tubular object with an elastic rubber layer in the tube wall, the two sections of bag tubes (2) are sleeved with each other inside and outside, and a mesh-like woven fiber reinforcement layer is arranged in the tube wall of at least one section of the bag tube (2) in the inner bag tube (21) of the inner layer and the outer bag tube (22) of the outer layer;
the interlayer cavity (3) is a cylindrical cavity with an annular cross section and surrounded by an interlayer between the inner sac tube (21) and the outer sac tube (22); the central cavity (4) is a cavity surrounded by the inner bag tube (21), is positioned in the center of the bag body (1), and is surrounded by the interlayer cavity (3);
the inner bag tube (21) and the outer bag tube (22) which enclose the interlayer cavity (3) are formed by folding the same continuous bag tube (2) in a segmented inner-outer turning manner, at least one end of the bag body (1) is an annular blind end (23) formed by the transition part of the inner bag tube and the outer bag tube, the sealer (5) is installed at the other end of the bag body (1) or the middle section of the bag body (1), and the annular center of the blind end (23) is the opening part of the central cavity (4);
the sealer (5) is a rigid assembly part, the sealer (5) comprises a core body (51) and a sleeve body (52), the center of the sleeve body (52) is provided with a mounting hole capable of being placed into the core body (51), and an opening at the end part of the bag tube (2) is sealed through assembly and locking; the outer part of the sealing connector (5) is provided with a mounting clamping groove or a thread, and the inner part of the sealing connector is provided with a pore passage (53) for pressure fluid to enter and exit the interlayer cavity (3);
when the pressure intensity or the injection amount of the fluid in the interlayer cavity (3) is actively changed, compression, ejection, traction and stretching acting forces are simultaneously generated on objects in the central cavity (4) and outside the capsule body through the expansion and contraction deformation of the capsule tube (2) and the change of the tube wall tension; conversely, the pressure or volume of the fluid in the interlayer cavity (3) can be correspondingly changed by applying external force to the capsule body (1) from the outside or in the central cavity (4).
2. The sandwich chamber hydraulic bladder of claim 1 wherein: the base material of the elastic rubber layer of the bag tube (2) is one or a combination of more of polyurethane elastomer, natural rubber, nitrile rubber, butyl rubber, chloroprene rubber, silicon rubber, fluorine rubber and ethylene propylene diene monomer.
3. The sandwich chamber hydraulic bladder of claim 1 wherein: the fibers of the fiber reinforced layer of the capsule tube (2) are mainly high-strength high-modulus fibers, namely any one or combination of more of aramid fibers, ultra-high molecular weight polyethylene fibers and carbon fibers, and the ratio of the high-strength high-modulus fibers to the total weight of the fibers is not less than 60%.
4. The sandwich chamber hydraulic bladder of claim 1 wherein: the inner bag tube (21) and the outer bag tube (22) which enclose the interlayer cavity (3) belong to two independent bag tubes (2), the two sealing devices (5) are respectively assembled at two ends of the bag body (1), an axial through hole (54) is formed in a core body (51) of at least one sealing device, and the axial through hole (54) is communicated with the central cavity (4).
5. An accumulator based on a sandwich chamber hydraulic cell of claim 1, characterized in that: the energy accumulator comprises a bag type energy accumulator and a sandwich cavity type hydraulic bag, wherein the bag type energy accumulator comprises a shell (61), an air bag (62), a liquid end valve seat (63) and an inflation valve (64); the bag tube (2) of the interlayer cavity type hydraulic bag is arranged in a shell, and the air bag (62) is arranged in the central cavity (4) and is surrounded by the inner bag tube (21); the seal (5) is mounted in a liquid end valve seat (63) of the accumulator.
6. An accumulator based on the sandwich cavity type hydraulic bag of claim 5, characterized in that: the accumulator comprises an inflation valve (64) and a sandwich cavity type hydraulic bag, wherein the inflation valve (64) is arranged at an axial through hole (54) of the sealer core body (51) at one end of the bag body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112483502B (en) * | 2020-12-15 | 2022-07-08 | 郑州煤矿机械集团股份有限公司 | Self-resilience multi-medium environment-friendly flexible hydraulic cylinder |
| CN113339336B (en) * | 2021-07-01 | 2022-05-27 | 深圳博鑫达科科技有限公司 | Vibration buffer mechanism of energy accumulator |
| CN114342768B (en) * | 2022-01-05 | 2023-05-12 | 河北科技师范学院 | Sealing device for treating forest tree after drilling |
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