EP0857256A1 - Pneumo-hydraulic converter for energy storage - Google Patents

Pneumo-hydraulic converter for energy storage

Info

Publication number
EP0857256A1
EP0857256A1 EP96934298A EP96934298A EP0857256A1 EP 0857256 A1 EP0857256 A1 EP 0857256A1 EP 96934298 A EP96934298 A EP 96934298A EP 96934298 A EP96934298 A EP 96934298A EP 0857256 A1 EP0857256 A1 EP 0857256A1
Authority
EP
European Patent Office
Prior art keywords
pneumo
hydraulic converter
characterized
pressure
converter
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
EP96934298A
Other languages
German (de)
French (fr)
Other versions
EP0857256B1 (en
Inventor
Ivan Cyphelly
Original Assignee
Ivan Cyphelly
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
Priority to CH311495 priority Critical
Priority to CH3114/95 priority
Application filed by Ivan Cyphelly filed Critical Ivan Cyphelly
Priority to PCT/CH1996/000386 priority patent/WO1997017546A1/en
Publication of EP0857256A1 publication Critical patent/EP0857256A1/en
Application granted granted Critical
Publication of EP0857256B1 publication Critical patent/EP0857256B1/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

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
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/072Combined pneumatic-hydraulic systems
    • F15B11/0725Combined pneumatic-hydraulic systems with the driving energy being derived from a pneumatic system, a subsequent hydraulic system displacing or controlling the output element
    • 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
    • F15B3/00Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F5/00Elements specially adapted for movement
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • F15B2211/20507Type of prime mover
    • F15B2211/20515Electric motor
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • F15B2211/2053Type of pump
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • F15B2211/2053Type of pump
    • F15B2211/20546Type of pump variable capacity
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • F15B2211/2053Type of pump
    • F15B2211/20569Type of pump capable of working as pump and motor
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/214Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being hydrotransformers
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/216Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being pneumatic-to-hydraulic converters
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/305Directional control characterised by the type of valves
    • F15B2211/30525Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/60Circuit components or control therefor
    • F15B2211/615Filtering means
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/60Circuit components or control therefor
    • F15B2211/625Accumulators
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/80Other types of control related to particular problems or conditions
    • F15B2211/88Control measures for saving energy

Abstract

In order to maintain high efficiency close to isothermy despite high frequencies in a pneumo-hydraulic converter with reciprocating pistons, pipe cluster-heat exchange pipes (38) are provided in the gas working chambers of the converter and the exchange fluid in the pipes is kept at approximately ambient temperature. For this the gas working chambers must be arranged axially next to one another and, in order to eliminate dead space, connected in pairs by conical exchange valves (12a/12b) which take in the entire wall thickness of the valve flange (5a/5b) dividing the air chambers.

Description

PNEUMO-HYDRAULIC CONVERTER FOR ENERGY STORAGE

It is a pneumo-hydraulic converter with back and hergehendem double piston known that connects with the best possible efficiency of a compressed air reservoir with a hydraulic circuit, in such a way that

Energy in the memory f Hesse may (load) or may be retrieved from the memory (unloading).

The good efficiency of the isothermal processes are sought in said system characterized in that the working chambers

(Piston chambers) are on each stroke stabilized temperature moderately by the working medium oil; Since the limited rate of heat transfer from the cylinder jacket surface to the air during the working can not compensate for this involves relatively slow processes, the temperature variations at high clock frequency; The consequences are large assemblies in proportion to the mastered performance.

Purpose of the invention is to achieve good efficiency while increasing the clock frequency.

this is achieved by the mentioned in the patent claim 1. According to the invention, according to which tubular heat exchanger penetrate some of the working areas of the transducer, an outer loop maintains the exchange fluid approximately to ambient temperature.

This heat exchanger can either run along with the reciprocating piston set or remain fixed. However, since the follower heat exchanger requires approximately one-third less sliding seals, and also the tubular bundle significantly increases the bending and buckling resistance of the piston set, the description will be limited to the presentation of the transducer propagate heat exchanger: the desired increase of the clock frequency forces namely to a radically totraumreduzierenden workspace arrangement causes the high buckling forces, making the buckling strength to a ausserordenthch important design factor that needs to be mitberucksichtigt also in the arrangement of the valves.

Since the converter is intended to operate both as a compressor and as an expander, the valve sets each side - must be controlled consisting j in each case from high-pressure valve, exchange valve and low-pressure valve forced wherein can be combined under certain conditions, exchange and low-pressure valve in its movement. The design of these valves as well as has the topological requirements of the heat exchanger and the

meet imperative minimal dead space; the solution of these objects and the operation of the invention will be explained with the aid of drawings, in which

FIG .1 is a longitudinal section of the four cylindrical through the axis

Work space shows

FIG .2 is a sectional view across the axis of FIG. l represents by the high-pressure space and through the heat exchanger tube bundle, and finally

FIG .3 shows the same section as Fig .2 illustrates, but with the bridged bundle of tubes.

The transducer in its high pressure design consists of three approximately equally long coaxial Zylmderrohrstücken, wherein the form tube (1), which encloses the pre-pressure piston (2) having a substantially larger diameter than the two opposite the inlet pressure pipe (1) symmetrically arranged high-pressure chamber tubes (3a / 3b ), which also include the longitudinally symmetrical high-pressure piston Ua / 4b). Also, since the moving parts as well as the fixed parts are mirror-symmetrical with respect to their longitudinal center, which pre-pressure pipe (1) sinngemass about Ventilflansche (5a / 5b) with the two screwed high pressure chamber tubes (3a / 3b) is connected to the (in each case by means of screw 6a / 6b) mounted terminal cover (7a / 7b) are completed. Axially in the cylinder tube sections slidably located a set of three pistons by the Fohrstange (8) are mechanically fixed, and thus 2 x 3 Define the working spaces, namely: between the terminal lids (7a / 7b) and the high pressure piston UaMb) the oil chambers (9a / 9b), between the high-pressure piston (Λa / 4b) and the valve flanges (5a / 5b) of the air-high pressure chambers (lOa / lOb) and between the valve flanges (5a / 5b) and the pre-pressure piston (2), the air inlet pressure spaces (IIa / IIb). The air high-pressure spaces (lOa / lOb) are connected to air-form spaces (IIa / IIb) via the exchange valves

(12a / 12b) connected to the outside world communicates with the inlet pressure spaces (IIa / IIb) via the low pressure valves (13a / 13b) and the air accumulator (K), the air-high pressure chambers can (lOa / lOb) via the high pressure valves (15a / 15b) apply, the (U) through the leads (I6a / L6B) across the terminals (17a / 17b) are powered by the air storage.

A possible embodiment of the pilot control by means of hydraulic impingement is shown in FIG. 1 to the high pressure valves (15a / 15b) shown wherein the pressure chambers (i8a / L8B) each one of the at

Pressure source connected (19) 2-way electrical

Pilot valves (20a / 20b) are either vented or pressurized, whereby the valve pistons are moved (21a / 21b) (22a 22b /) valves with nuts (23a / 23b) with the high pressure on the bars (15a / L5B) are connected , Similar devices can also be provided for the exchange valves (12a / 12b) and the low-pressure valves (13a / 13b), wherein only their actuating rods (24a / 24b) and (25a / 25b) are shown here.

Is to better understand starting at the Olanschlüssen

(26a / 26b), a Beschaltungsmöglichkeit of the transducer shown, with supply lines (27a / 27b) to a V-way valve (28) having a variable hydrostatic unit (29) with flywheel (30) and electric motor / generator (31) acted upon. The exchanger cycle begins with the feed pump (32), the exchange fluid through the external exchanger (33) via port (34b) in the connection cover (7b) and the feed tube (35b) into the tubular rod (8) is introduced. Since these tubular rod (8) in the plane of the inlet pressure piston (2) by a conical plug (36) is closed, the exchange fluid through the annular space between the feed tube (35b) and tubular rod (8) is pushed back to the high pressure piston, in which about

Radial holes (37b) the exchanger bundle tubes (38) are fed, and therefore the high-pressure piston (4a), - via its radial bores (37a) in turn, the tubular rod (8) is reached; the circuit back to the feed pump (32) is closed via the feed tube (35a) and the connection (34a).

As the high pressure piston sliding seals are (39a / 39b) and the Aus¬ exchange valve sliding seals (40a / 40b) and the Tauscher- seals (41a / 41b) and passing charged (42a / 42b) through the entire piston moves at full pressure difference: this is the real technological challenge of the concept, particularly if the tube bundle configuration for the purpose of Eröhung the kink resistance and the heat transfer tube bundle of a bypass (43) as shown in Fig. 3 provides. Only the sliding seal (44) of the pre-piston (2) is spared the high pressures, as it is only exposed to the supply pressure. The remaining seals unspecified are claimed only statically or short stroke.

The operation of the converter is now in a cycle of

Relaxation (discharge) will be explained, which corresponds to the position of the valves shown, with the piston assembly moves towards the right: in the drawing held moment is (with the air reservoir through the open-air high-pressure valve (15b) of the air-high-pressure chamber (10b) 14 ) connected directly: the compressive force is sinngemass added in the oil chamber (9b) and transmitted motor acting through the oil column in the conduit (27b) via the 4-way valve (28) on the pressure side of the hydrostatic unit (29), which consequently the flywheel (30) and drives the generator (31). also by means of Form piston (2) is displaced expanded air in the space (IIb) via the open low-pressure valve (13b) in the environment and at the same time from the previous movement in air-high-pressure chamber (10a) to form air remaining over the by said movement to the right open exchange valve (12a) by the expanding inlet pressure chamber (Ila) placed on discharge pressure. the light emerging from the hydrostatic unit oil in the oil chamber (9a) is sucked through the same movement. By the padding in the oil chamber (9b) received force thus created not only by the Hochdruckbeaufschlagung in the air high-pressure chamber (10b), it adds up to this, the by the form of the great

Here, the risk of buckling 1 lurking on a means of computer to be determined instead of this Rechtshubes now has the high pressure valve (15b) closes area of the inlet pressure piston (2) resulting thrust on the tubular rod (8) and the tubes (38) of the Tauscherbundeis is transmitted so that the relaxation, this thereby defined volume at the end of the stroke results in exactly the form which after the stroke reversal by shifting the contents of the air high-pressure chamber (10b) reaches in the inlet pressure chamber (IIb) by expansion of the outlet pressure. At the moment of Hubumkehrs must therefore together with the switch (28) and (15a), (13a)

& (12b) is opened and (12a) and (13b) are closed (in which (13b) is indeed already printed (by the accruing form flask 2) in the Schhesstellung). This change can be triggered by a proximity switch.

Abschhessend should be emphasized that the illustrated topological configuration is part of the invention and particularly good fit to the process described, always repeating thermodynamic process, especially by the selected pressurized plenum and exchanger arrangement, no dead space shuttle valve design is possible with the concept of a conversion with highest efficiencies stands or falls.

It should be finally pointed out that, within a stroke of the emerging from this transducer oil pressure per stroke in a ratio of about 1: fluctuates 30 (at 200 bar (in the air reservoir 14)), which makes the direct application in many cases problematic because the hydrostatic units via a Verdrangervolumen control range of at most 1: 10 grout. If, therefore, the transducer cope with a constant power, it is advisable to route via a flywheel which can bridge a wide frequency range, wherein the hydrostatic unit has only to follow the effective load changes.

Operates the converter only as a compressor eliminates the

Positive control of the valves, it must be the 4-way diverter valve (28) are automatically synchronized (by the pressure peak at the stop) or by means of proximity switches with the Wandlerhub either ledighch; and the compressor can in simple compression tasks (eg for cooling circuits..) are carried out without pre-pressure cylinder: the shell and tube heat exchanger may hereby be either stationary or ongoing basis, since no bending forces.

Claims

claims
1 . Pneumo-hydraulic converter with reciprocating piston, characterized in that an integrated shell and tube heat exchanger of the gas working spaces
penetrates converter, wherein an external circuit for the exchange fluid is provided which holds the tube bundle heat exchanger approximately to ambient temperature.
2. Pneumo-hydraulic converter as claimed in claim 1, characterized gekennzeicnnet that the integrated tubular heat exchanger gas working chambers and the oil working space penetrates.
3. Pneumo-hydraulic converter as claimed eineim of the claims 1 or 2, characterized in that the exchanger tubes (38) are connected by bridges (43), in order to increase the heat transfer and the buckling strength.
4. Pneumo-hydraulic converter as claimed in claims 1 and 3, characterized in that the exchanger tubes (38) from the piston set (2 / 4a / 4b) are carried along.
5. Pneumo-hydraulic converter as claimed in claims 1 to 4, characterized in that the gas pre-pressure chambers (lla / llb) and the gas high-pressure chambers (lOa / lOb) axially adjacent to each other, and that the oil chambers (9a / 9b) of the ends are arranged.
6. Pneumo-hydraulic converter as claimed in claims 1 or 2 and 5, characterized in that as regards the prevention of dead spaces in each case a gas high-pressure chamber is connected to the corresponding form space over conical seat valves on the tubular rod (8) or the exchanger tubes (38 ) are guided gleitdichtend and the air spaces occupy the entire dividing wall thickness of the valve flange (5a / 5b).
EP96934298A 1995-11-03 1996-11-01 Pneumo-hydraulic converter for energy storage Expired - Lifetime EP0857256B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH311495 1995-11-03
CH3114/95 1995-11-03
PCT/CH1996/000386 WO1997017546A1 (en) 1995-11-03 1996-11-01 Pneumo-hydraulic converter for energy storage

Publications (2)

Publication Number Publication Date
EP0857256A1 true EP0857256A1 (en) 1998-08-12
EP0857256B1 EP0857256B1 (en) 1999-03-31

Family

ID=4248922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96934298A Expired - Lifetime EP0857256B1 (en) 1995-11-03 1996-11-01 Pneumo-hydraulic converter for energy storage

Country Status (8)

Country Link
US (1) US6145311A (en)
EP (1) EP0857256B1 (en)
JP (1) JP3194047B2 (en)
AT (1) AT178389T (en)
CA (1) CA2236746A1 (en)
DE (1) DE59601569D1 (en)
OA (1) OA10682A (en)
WO (1) WO1997017546A1 (en)

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JPH11501387A (en) 1999-02-02
CA2236746A1 (en) 1997-05-15
JP3194047B2 (en) 2001-07-30
US6145311A (en) 2000-11-14
WO1997017546A1 (en) 1997-05-15
AT178389T (en) 1999-04-15
OA10682A (en) 2001-05-03
DE59601569D1 (en) 1999-05-06
EP0857256B1 (en) 1999-03-31

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