EP2863051B1 - Hydraulic engine including hydraulic power unit - Google Patents
Hydraulic engine including hydraulic power unit Download PDFInfo
- Publication number
- EP2863051B1 EP2863051B1 EP13189335.6A EP13189335A EP2863051B1 EP 2863051 B1 EP2863051 B1 EP 2863051B1 EP 13189335 A EP13189335 A EP 13189335A EP 2863051 B1 EP2863051 B1 EP 2863051B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- tube
- elastic
- disposed
- hollow
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B17/00—Other machines or engines
- F03B17/005—Installations wherein the liquid circulates in a closed loop ; Alleged perpetua mobilia of this or similar kind
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/709—Piezoelectric means
Definitions
- the hydraulic tube may include a plurality of first elastic links.
- the elastic tube may be formed as a corrugated pipe having a plurality of corrugations extending in a longitudinal direction.
- the first elastic link may be disposed so as to come into contact with a concave portion of the corrugation and to extend in a longitudinal direction along the corrugation.
- One end of the first elastic link may come into contact with the connection jig through the front position fixation holder, the other end thereof may come into contact with the vibration rod through the position fixation holder, and the elastic tube may be pressed in a horizontal direction according to a deformation force of the vibration rod.
- a lower portion of the second curved portion may come into contact with at least a portion between the first curved portions.
- the fluid chamber and the discharge hole formed in front of the front flange and a side through hole formed in a metal tube of the hydraulic tube may be connected to each other so that the fluid flows therebetween.
- the hydraulic tube 100 extends in a longitudinal direction.
- the hydraulic tube 100 includes a metal tube 112 formed on the outside thereof and an elastic tube 114 formed on the inside thereof, and is configured in the form of a double tube having an outer hollow 116 and an inner hollow 118.
- the oscillator 300 is configured to move bidirectionally and changes a pressure of fluid within the hydraulic tube 100 by applying a deformation force to the vibration rod 230 according to its deformation so that the fluid within the hydraulic tube 100 is extruded to the outside or flows into the hydraulic tube 100.
- the hydraulic tube 100 is a tube type structure having a hollow that extends in a longitudinal direction and is filled with a working fluid.
- the amplitude amplification device 200 is disposed at the rear side of the hydraulic tube 100.
- the amplitude amplification device 200 includes the plurality of casings 212 having a hollow formed therein, the plurality of swell tubes 214 that are respectively disposed within the casings 212 and have a cylindrical hollow therein, the plurality of vibration rods 230 that are respectively disposed in the hollows of the swell tubes 214, and the plurality of elastic chips 220 that are respectively disposed in the hollows of the swell tubes 214, intersect with the hollows, and are disposed between the vibration rods 230.
- the plurality of casings 212 are configured as a housing of the amplitude amplification device 200, and may have a cylindrical shape having a hollow formed therein.
- the vibration rod 230 is disposed within the swell tube 214.
- the vibration rod 230 is a member having a configuration of a cylindrical beam and is disposed within the swell tube 214. At least one vibration rod 230 is disposed within the swell tube 214.
- the elastic chip 220 is disposed to come into contact with the vibration rod 230 and the oscillator head 310 and to receive a pressing force from the oscillator head 310. Accordingly, the elastic chip 220 maintains its flat shape in an initial state when an external force is not applied thereto. Subsequently, when an external force is applied to the elastic chip 220 from the oscillator 300, the elastic chip 220 is deformed into a curved shape according to its restoring force.
- the position fixation holders 180 and 181 are respectively disposed at the front side and the rear side of the hydraulic tube 100.
- the position fixation holders 180 and 181 are disposed within the metal tube 112 so as to respectively come into contact with the front and rear sides of the elastic tube 114. That is, the elastic tube 114 is disposed between the position fixation holders 180 and 181 and the connection jig 130, and the movement of a fluid between the outer hollow 116 and the inner hollow 118 may be blocked by the position fixation holders 180 and 181 and the connection jig 130.
- the elastic tube 114 is formed as a corrugated pipe having a plurality of corrugations extending in a longitudinal direction, and thus, a cross-section of the elastic tube 114 in a horizontal direction may have such a shape with alternating concave portions and convex portions.
- the cross-section of the elastic tube 114 may have a star shape in which a plurality of convex portions and a plurality of concave portions are formed in a circumferential direction.
- the elastic link 170 is disposed in the concave portion of the elastic tube 114.
- the elastic link 170 is a member having a configuration and arrangement as presented above, and it should be understood that the elastic link 170 is not a member for connecting other members.
- the elastic chip 220 when an external force is applied to the elastic chip 220 from the oscillator 300, the elastic chip 220 is deformed into a curved shape with a protruding center portion.
- the elastic chip 220 may be repeatedly deformed and restored to the original shape according to the external force applied from the oscillator 300 disposed below the hydraulic power unit 1.
- the rear flange 430 includes a fixation hole 432 for fixing the hydraulic power unit 1, and an extrusion passage 434.
- the extrusion passage 434 is formed so that the rotor blade 422 formed in the rotor and the inner hollow 118 of the hydraulic tube 100 included in the hydraulic power unit 1 communicate with each other.
- the front flange 440 includes a discharge hole 442 for discharging a fluid which is inpoured through the rotor blade 422, and the fluid chamber 450 disposed in front of the front flange 440.
- the housing is a member constituting an outer shape of the hydraulic engine 2 according to the current embodiment of the present invention.
- the rotor 420 and a plurality of the hydraulic power units 1 may be disposed within the housing.
- the fluid extruded from the inner hollow 118 may rotate the rotor 420 and then flow into the outer hollow 116. Therefore, the fluid may be extruded to the inside or outside of the hydraulic tube 100, and the extrusion and inpouring of the fluid with respect to the hydraulic tube 100 may be bidirectionally performed at the same time, thereby rotating the rotor 420 in one direction. Meanwhile, the predetermined fluid chamber 450 having the working fluid gathered therein may be included in the fluid movement path of the outer hollow 116.
- a force applied to a fluid may be constantly balanced by a complementary operation so that a strong forward driving force of the oscillator 300 of the even-numbered hydraulic power units 1A and a weak backward driving force of the oscillator 300 of the even-numbered hydraulic power unit 1 B are combined with each other through a forward driving fluid that is extruded from the fluid chamber 450 and the injection chamber passage 438.
- an inverse piezoelectric effect is mainly used by the ceramic oscillator 300 that is included in the hydraulic power unit 1 constituting the hydraulic engine 2. Based on the inverse piezoelectric effect, a displacement and strong force occur in the ceramic oscillator 300 according to a driving voltage, a driving frequency, and stiffness (rigidity) of the ceramic oscillator 300. Since a working fluid to be extruded strongly presses the rotor blade 422 due to the displacement and strong force, a torque for rotating the rotor 420 may be extremely increased. In particular, a flow rate of the working fluid may be arbitrarily changed by adjusting a time to apply a driving signal.
- the hydraulic engine according to the present invention does not require additional power or fuel except for power of a secondary battery included in a driving module, which is used to generate a signal to be applied to the ceramic oscillator included in the hydraulic power unit. Accordingly, the hydraulic engine may be continuously driven within a lifespan range of the ceramic oscillator and a secondary battery for supplying power for applying a driving signal to the ceramic oscillator without supplying additional power or fuel.
Description
- One or more embodiments of the present invention relate to a hydraulic engine, and more particularly, to a hydraulic power unit that includes a ceramic oscillator and inpours and extrudes a fluid in association with the ceramic oscillator, and a hydraulic engine that includes the hydraulic power unit and generates rotatory power.
- In general, power (rotatory power) for driving vehicles, various machines, or mechanisms is obtained by burning a fossil fuel. When the fossil fuel is burned, a large amount of carbon dioxide is generated, and various harmful substances are mass-produced, which is a major cause of environmental pollution. In addition, it is widely known that there is a limitation in relying on fossil fuel because the amount of fossil fuel such as crude oil or coal which exists on earth is limited. For this reason, humans have tried to develop new energy sources and have conducted research into methods of effectively using existing energy sources.
- Among the research results achieved so far, a method of obtaining power for a vehicle or a machine by using electrical energy obtained through battery charging, a method of burning existing fossil fuel, and a hybrid method using a battery have been developed. However, existing power generation apparatuses (engines) which utilize electrical energy have a performance limit. For this reason, there are increasing demands to develop new power generation apparatuses that do not generate carbon dioxide when used, use eco-friendly electrical energy, and have better performance and a long lifespan.
- Meanwhile,
EP2 587 062 A1 discloses a "hydraulic power unit having ceramic oscillator, and hydraulic engine including the hydraulic power unit". This hydraulic power unit includes a ceramic oscillator and may introduce or extrude a fluid due to an operation of the ceramic oscillator, and a hydraulic engine that includes the hydraulic power unit and generates a rotational force. However, this hydraulic power unit is just having low energy efficiency. - One or more embodiments of the present invention include a new engine that generates rotatory power by using deformation energy of eco-friendly ceramics, the engine having improved performance and a long lifespan.
- One or more embodiments of the present invention include a hydraulic power unit which is environmentally friendly, has a long lifespan, and may extrude a working fluid by using a strong force, which may be used in order to form a new engine.
- Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments.
- According to one or more embodiments of the present invention, a hydraulic engine includes a hydraulic power unit comprising a hydraulic tube comprising a hollow portion having an opened front end and being filled with a fluid, an amplitude amplification device that is disposed at the rear side of the hydraulic tube, an oscillator that is disposed at the rear side of the amplitude amplification device so as to be deformed and increases and decreases a pressure within the hydraulic tube, and an oscillator head that is attached to a front end of the oscillator. The hydraulic tube extends in a longitudinal direction, comprises a metal tube formed on the outside thereof and an elastic tube formed on the inside thereof, and is configured in the form of a double tube having an outer hollow and an inner hollow. The amplitude amplification device comprises a casing having a hollow formed therein, a swell tube that is disposed within the casing and has a cylindrical hollow therein, a plurality of vibration rods that are disposed in the hollow of the swell tube, and an elastic chip that is disposed in the hollow of the swell tube, intersects with the hollow, and is disposed between the plurality of vibration rods. The oscillator moves bidirectionally and changes a pressure within the hydraulic tube by applying deformation force to the vibration rod according to its deformation so that a fluid within the hydraulic tube is extruded to the outside or flows into the hydraulic tube.
- The oscillator may be deformed in a direction toward the inside of the hollow portion of the hydraulic tube and in an opposite direction when electricity is applied thereto by an inverse piezoelectric effect.
- The hydraulic tube may include a front position fixation holder and a rear position fixation holder that is disposed within the metal tube and comes into contact with a front side and a rear side of the elastic tube, and a connection jig that is disposed at a front end of the metal tube and is disposed so as to come into contact with the front side of the position fixation holder of the elastic tube. The position fixation holder may be disposed so as to come into contact via a seal ring with at least one vibration rod included in the amplitude amplification device. At least a portion of the connection jig seals the outer hollow. An opening may be formed in at least a portion of the connection jig so as to cause the inner hollow and the outside to communicate with each other. A side through hole may be formed at one side of the metal tube so as to cause the outer hollow and the outside to communicate with each other.
- The hydraulic tube may include a plurality of first elastic links. The elastic tube may be formed as a corrugated pipe having a plurality of corrugations extending in a longitudinal direction. The first elastic link may be disposed so as to come into contact with a concave portion of the corrugation and to extend in a longitudinal direction along the corrugation. One end of the first elastic link may come into contact with the connection jig through the front position fixation holder, the other end thereof may come into contact with the vibration rod through the position fixation holder, and the elastic tube may be pressed in a horizontal direction according to a deformation force of the vibration rod.
- The first elastic link may be formed by bending an elongated steel wire. The first elastic link may include first curved portions, which are both sides of the steel wire being bent inwards in a longitudinal direction, and second curved portions, which are both ends of the steel wire being bent and gathered together toward the center through the first curved portions. The second curved portion may have a ring shape.
- A lower portion of the second curved portion may come into contact with at least a portion between the first curved portions.
- The elastic chip may be formed of a material having an elastic restoring force, the elastic chip having a form of a circular plate with a protruding central portion, and may be provided with a plurality of holes formed along a circumference thereof.
- The holes may be formed in a fan shape with a portion of the circumference of the elastic chip forming an arc thereof.
- The swell tube may include a plurality of second elastic links that are disposed along a circumferential surface of the vibration rod.
- The second elastic link may be formed by bending an elongated steel wire. The second elastic link comprises first curved portions, which are both sides of the steel wire being bent inwards in a longitudinal direction, and second curved portions, which are both ends of the steel wire being bent and gathered together toward the center through the first curved portions. The second curved portion may have a ring shape.
- The lower portion of the second curved portion may come into contact with at least a portion between the first curved portions.
- The elastic chip may be disposed at a position overlapping a position at which the second curved portion is disposed.
- According to one or more embodiments of the present invention, a hydraulic engine includes the hydraulic power unit; a housing; a rotor that is rotatably supported within the housing and has a rotor blade disposed on the circumference thereof; and a flange that is disposed within the housing. The flange comprises a front flange and a rear flange, and a rotor is disposed between the front flange and the rear flange. The rear flange comprises a fixation hole for fixing the hydraulic power unit and an extrusion hole. The extrusion passage is configured to cause the rotor blade of the rotor and an inner hollow of a hydraulic tube included in the hydraulic power unit to communicate with each other. The front flange comprises a fluid chamber and a discharge hole so that a fluid inpoured through the rotor blade is bidirectionally discharged.
- The extrusion passage may have a tilt angle with respect to the rotor blade so that the fluid extruded from the hydraulic tube applies an extrusion force to the rotor blade to thereby rotate the rotor.
- The fluid chamber and the discharge hole formed in front of the front flange and a side through hole formed in a metal tube of the hydraulic tube may be connected to each other so that the fluid flows therebetween.
- The hydraulic engine may further include an operational module that drives the hydraulic power unit, adjusts a number of rotations and torque of the rotor, and comprises a secondary battery as a driving power source.
- These and/or other aspects will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
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FIG. 1 is a diagram illustrating a contour of a hydraulic engine according to an embodiment of the present invention; -
FIG. 2 is a diagram illustrating a structure of a hydraulic power unit included in the hydraulic engine according to the embodiment of the present invention; -
FIG. 3 is a diagram illustrating first and second elastic links included in a hydraulic tube and an amplification device of the hydraulic engine according to the embodiment of the present invention; -
FIG. 4 is a diagram illustrating a structure of the hydraulic tube of the hydraulic engine according to the embodiment of the present invention; -
FIG. 5 is a diagram illustrating a front position fixation holder; -
FIG. 6 is a diagram illustrating a rear position fixation holder; -
FIG. 7 is a cross-sectional view taken along a line A-A ofFIG. 4 ; -
FIG. 8 is a diagram illustrating a structure of an amplitude amplification device of the hydraulic engine according to the embodiment of the present invention; -
FIG. 9 is a cross-sectional view taken along a line B-B ofFIG. 8 ; -
FIG. 10 is a diagram illustrating a structure of a portion of the amplitude amplification device of the hydraulic engine according to the embodiment of the present invention; -
FIG. 11 is a diagram illustrating the hydraulic engine according to the embodiment of the present invention; -
FIG. 12 is a diagram illustrating a rear flange of the hydraulic engine according to the embodiment of the present invention; -
FIG. 13 is a diagram illustrating a front flange of the hydraulic engine according to the embodiment of the present invention; -
FIG. 14 is a diagram illustrating a flow of a working fluid of the hydraulic engine according to the embodiment of the present invention; and -
FIG. 15 is a diagram illustrating the whole hydraulic flow of a working fluid of the hydraulic engine according to the embodiment of the present invention. - Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. In this regard, the present embodiments may have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, the embodiments are merely described below, by referring to the figures, to explain aspects of the present description. Expressions such as "at least one of," when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.
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FIG. 1 is a diagram illustrating a hydraulic engine according to an embodiment of the present invention.FIG. 2 is a diagram illustrating a structure of a hydraulic power unit included in the hydraulic engine according to the embodiment of the present invention.FIG. 3 is a diagram illustrating first and second elastic links included in a hydraulic tube and an amplification device of the hydraulic engine according to the embodiment of the present invention.FIG. 4 is a diagram illustrating a structure of the hydraulic tube of the hydraulic engine according to the embodiment of the present invention.FIG. 5 is a diagram illustrating a front position fixation holder. -
FIG. 6 is a diagram illustrating a rear position fixation holder.FIG. 7 is a cross-sectional view taken along a line A-A ofFIG. 4 .FIG. 8 is a diagram illustrating a structure of an amplitude amplification device of the hydraulic engine according to the embodiment of the present invention.FIG. 9 is a cross-sectional view taken along a line B-B ofFIG. 8 .FIG. 10 is a diagram illustrating a structure of a portion of the amplitude amplification device of the hydraulic engine according to the embodiment of the present invention. - Hereinafter, a
hydraulic power unit 1 of a hydraulic engine according to the present invention will be described. - The
hydraulic power unit 1 according to the present invention includes ahydraulic tube 100 that has a hollow portion that has an opened front end and is filled with a fluid, an amplitude amplification device 200 that is disposed at the rear side of thehydraulic tube 100, and anoscillator 300 that is disposed at the rear side of the amplitude amplification device 200 so as to be deformed and increases and decreases a pressure within thehydraulic tube 100. - The
hydraulic tube 100 extends in a longitudinal direction. Thehydraulic tube 100 includes ametal tube 112 formed on the outside thereof and anelastic tube 114 formed on the inside thereof, and is configured in the form of a double tube having an outer hollow 116 and an inner hollow 118. - The amplitude amplification device 200 includes a plurality of
casings 212 having a hollow formed therein, a plurality ofswell tubes 214 that are respectively disposed within thecasings 212 and have a cylindrical hollow therein, a plurality ofvibration rods 230 that are respectively disposed in the hollows of theswell tubes 214, and a plurality ofelastic chips 220 that are respectively disposed in the hollows of theswell tubes 214, intersect with the hollows, and are disposed between thevibration rods 230. - The
oscillator 300 is configured to move bidirectionally and changes a pressure of fluid within thehydraulic tube 100 by applying a deformation force to thevibration rod 230 according to its deformation so that the fluid within thehydraulic tube 100 is extruded to the outside or flows into thehydraulic tube 100. - Hereinafter, the
hydraulic tube 100 will be described. - The
hydraulic tube 100 is a tube type structure having a hollow that extends in a longitudinal direction and is filled with a working fluid. - Specifically, the
hydraulic tube 100 is formed in the form of a double tube including themetal tube 112 formed on the outside thereof and theelastic tube 114 formed on the inside thereof and has the outer hollow 116 and the inner hollow 118. That is, theelastic tube 114 is disposed within themetal tube 112, and thus, thehydraulic tube 100 has a double tube structure in which the inner hollow 118 is formed within theelastic tube 114, the outer hollow 116 is formed between theelastic tube 114 and themetal tube 112, and the inner hollow 118 is formed within the outer hollow 116. - The
metal tube 112 is formed of a metal material, and theelastic tube 114 is formed of a metal or an elastic material. Theelastic tube 114 may be formed of a material having an elastic restoring force, for example, a metal, plastic, or rubber. - Hereinafter, the amplitude amplification device 200 will be described.
- The amplitude amplification device 200 is disposed at the rear side of the
hydraulic tube 100. The amplitude amplification device 200 includes the plurality ofcasings 212 having a hollow formed therein, the plurality ofswell tubes 214 that are respectively disposed within thecasings 212 and have a cylindrical hollow therein, the plurality ofvibration rods 230 that are respectively disposed in the hollows of theswell tubes 214, and the plurality ofelastic chips 220 that are respectively disposed in the hollows of theswell tubes 214, intersect with the hollows, and are disposed between thevibration rods 230. - The plurality of
casings 212 are configured as a housing of the amplitude amplification device 200, and may have a cylindrical shape having a hollow formed therein. - The
swell tube 214 is disposed within thecasing 212, and may have a cylindrical shape having a hollow formed therein in a similar manner to thecasing 212. - The
swell tube 214 may have a structure in which a plurality of secondelastic links 260 are arrayed in the form of a cylinder. That is, the plurality of secondelastic links 260 extend in a longitudinal direction are disposed in a circumferential direction so as to form a cylindrical tube, thereby completing theswell tube 214. The secondelastic link 260 will be described below in detail. - The
vibration rod 230 is disposed within theswell tube 214. Thevibration rod 230 is a member having a configuration of a cylindrical beam and is disposed within theswell tube 214. At least onevibration rod 230 is disposed within theswell tube 214. - Meanwhile, a spool or a plunger may be provided at the front end of the
vibration rod 230, but the present invention is not limited thereto. - As illustrated in
FIG. 7 , the plurality ofelastic chips 220 are disposed within theswell tube 214, and each of theelastic chips 220 is has a circular plate for before deformation and crosses the hollow of theswell tube 214. Theelastic chip 220 is disposed within theswell tube 214 so as to come into contact with thevibration rod 230. Theelastic chip 220 includes a plurality ofholes 222 formed along a circumference thereof. Meanwhile, as illustrated inFIG. 9 , theholes 222 are radially disposed, and may be formed in a fan shape with an inner side of the hollow forming an arc thereof. - In addition, the
elastic chip 220 is formed of a material having an elastic restoring force, and may be a Belleville spring that is formed of, for example, a metal. Meanwhile, for example, theelastic chip 220 may have a shape with a protruding center portion. Thus, theelastic chip 220 is deformed in accordance with an increase or decrease in an external force or the presence or absence of an external force. For example, theelastic chip 220 may be deformed from a flat shape before the deformation to a curved shape in accordance with the application of an external force. Theelastic chip 220 is formed of an elastic material, and thus, has a restoring force according to its deformation. - Meanwhile, the
elastic chip 220 is disposed to come into contact with thevibration rod 230 and theoscillator head 310 and to receive a pressing force from theoscillator head 310. Accordingly, theelastic chip 220 maintains its flat shape in an initial state when an external force is not applied thereto. Subsequently, when an external force is applied to theelastic chip 220 from theoscillator 300, theelastic chip 220 is deformed into a curved shape according to its restoring force. - Hereinafter, the
oscillator 300 will be described. - The
oscillator 300 is disposed at the rear end of thehydraulic power unit 1, and may be deformed in a longitudinal direction of thehydraulic power unit 1. Theoscillator 300 is constituted by a piezoelectric element, and is preferably formed as a stack including piezoelectric elements. Meanwhile, theoscillator head 310 that transmits a force according to the deformation of theoscillator 300 may be disposed at a tip of theoscillator 300. At this time, theoscillator head 310 is partially inserted into theswell tube 214 so as to come into contact with theelastic chip 220. Thus, theelastic chip 220 may be disposed between theoscillator head 310 and thevibration rod 230 to thereby receive a pressing force from both theoscillator head 310 and thevibration rod 230. In addition, a connecting device may be disposed in an operational module for driving theoscillator 300. - Meanwhile, the
hydraulic engine 2 may further include an operational module (not shown) that drives thehydraulic power unit 1 by applying an operational signal to theoscillator 300, adjusts a number of rotations and a torque of the rotor, and includes a secondary battery as a driving power source. - The
hydraulic engine 2 may further include anoscillator housing 414 so as to surround theoscillator 300. Theoscillator housing 414 may be filled with an insulation oil so as to reduce the temperature of theoscillator 300 which increases due to the operation of theoscillator 300. Theoscillator housing 414 may include an openedhole 416 through which the insulation oil within theoscillator housing 414 flows and a predetermined pipe so as to move the insulation oil. The pipe may communicate with a predetermined cooling unit. The cooling unit includes a predetermined pipe structure and a cooling device, and prevents the temperature of theoscillator 300 from excessively increasing, thereby preventing a reduction of the operational efficiency of thehydraulic power unit 1 and ahydraulic engine 2 according to the present invention. - Preferably, the
oscillator 300 is deformed when electricity is applied thereto by an inverse piezoelectric effect, and is deformed in a direction toward the inside of the hollow portion of thehydraulic tube 100 and in a direction opposite thereto. - Hereinafter, more detailed configurations and a connection structure of components constituting the
hydraulic power unit 1 will be described. - Preferably, the
hydraulic tube 100 includesposition fixation holders metal tube 112 and respectively come into contact with the front side and the rear side of theelastic tube 114, and aconnection jig 130 that is disposed at a front end of themetal tube 112 and at the same time in front of the frontposition fixation holder 181 coming into contact with the front side of theelastic tube 114. - The
connection jig 130 may be a member that is disposed to fix thehydraulic power unit 1 to thehydraulic engine 2 when configuring thehydraulic engine 2 by using thehydraulic power unit 1. For example, theconnection jig 130 may have a pipe shape having a male screw portion formed on the outside thereof and having anopening 132 therein. - At least a portion of the
connection jig 130 seals the outer hollow 116, and theopening 132 may be formed in at least a portion of theconnection jig 130 so that the inner hollow 118 communicates with the outside. - That is, as illustrated in
FIG. 2 , theconnection jig 130 is configured in such a manner that a portion thereof extends in a circumferential direction. The extended portion seals a front end of the outer hollow 116 formed between themetal tube 112 and theelastic tube 114 so as to block the communication between the outer hollow 116 and the inner hollow 118. In addition, theopening 132 is formed in a center portion of theconnection jig 130 so that the inner hollow 118 formed by theelastic tube 114 communicates with the outside. - Meanwhile, a side through
hole 160 is formed at one side of themetal tube 112 so that the outer hollow 116 communicates with the outside. The movement of a fluid through the side throughhole 160 will be described below. - The
position fixation holders hydraulic tube 100. In addition, theposition fixation holders metal tube 112 so as to respectively come into contact with the front and rear sides of theelastic tube 114. That is, theelastic tube 114 is disposed between theposition fixation holders connection jig 130, and the movement of a fluid between the outer hollow 116 and the inner hollow 118 may be blocked by theposition fixation holders connection jig 130. - The
position fixation holder 180 is disposed to come into contact through aseal ring 150 with at least onevibration rod 230, which is included in the amplitude amplification device 200. Theposition fixation holder 180 may transmit a deformation force according to thevibration rod 230 to a fluid within thehydraulic tube 100 through theelastic link 170. - The
elastic tube 114 is formed as a corrugated pipe having a plurality of corrugations extending in a longitudinal direction, and thus, a cross-section of theelastic tube 114 in a horizontal direction may have such a shape with alternating concave portions and convex portions. For example, as illustrated inFIG. 8 , the cross-section of theelastic tube 114 may have a star shape in which a plurality of convex portions and a plurality of concave portions are formed in a circumferential direction. - The
elastic link 170 is disposed in the concave portion of theelastic tube 114. - The
elastic link 170 is formed of a material having stiffness and elasticity like an elongated steel wire. - The
elastic link 170 is formed by bending an elongated straight steel wire. For example, theelastic link 170 is formed by bending both ends of the steel wire inwards in a longitudinal direction as illustrated inFIG. 3 and then by bending the both ends gathered together toward the center, and thus, theelastic link 170 has a ring shape. Thus, theelastic link 170 may include first curved portions formed at both ends and second curved portions formed to come into contact with each other on the inner side. Meanwhile, an elongated straight portion is formed between the curved portions. - The second curved portion is bent in the form of a ring, and may be preferably configured such that a lower portion of the ring comes into contact with the straight portion below the ring. That is, the lower portion of the second curved portion may come into contact with at least a portion between the first curved portions.
- Thus, when the both ends of the
elastic link 170 are pressed in a state where the upward deformation of theelastic link 170 is limited, theelastic link 170 may be deformed in such a manner that the second curved portions having a ring shape are gathered together on the inner side and press the straight portion below the second curved portions so as to be bent downwards. - The
elastic link 170 is a member having a configuration and arrangement as presented above, and it should be understood that theelastic link 170 is not a member for connecting other members. - Meanwhile, the predetermined
position fixation holders elastic link 170 within the hydraulic tube. Theposition fixation holders elastic link 170 and theelastic tube 114. As illustrated inFIG. 4 , a predetermined step height formed in the inner surface of the ofconnection jig 130 may function as theposition fixation holder 181. - That is, the
elastic link 170 is disposed in front of thevibration rod 230 so as to be interposed between theconnection jig 130 andposition fixation holders elastic link 170 through thevibration rod 230, theelastic link 170 is deformed in a direction of an inner diameter, and thus, theelastic link 170 presses theelastic tube 114, thereby changing a pressure of a fluid within theelastic tube 114. - The
elastic link 170 according to the current embodiment may be more stably fixed between theconnection jig 130 and theposition fixation holders elastic link 170 may be more stably deformed in the direction of the inner diameter due to the deformation force in both lateral directions. Accordingly, the fluid within thehydraulic tube 100 may be more smoothly extruded or inpoured. - That is, when the
elastic link 170 is compressed by thevibration rod 230 in a longitudinal direction, the second curved portions are pressed inwards against each other, and thus, the second curved portions press the straight portion, which is disposed below the second curved portions, downwards. Thus, when thevibration rod 230 presses theelastic link 170, the straight portion is prevented from being deformed upwards and is pressed downwards due to the pressure of the second curved portions to thereby be deformed. In addition, thevibration rod 230 presses theelastic link 170 so that theelastic tube 114 is deformed inwards. -
FIGS. 9 and10 illustrate the amplitude amplification device 200. - The amplitude amplification device 200 according to the current embodiment includes the plurality of
casings 212 having a hollow formed therein, the plurality of secondelastic links 260 that are respectively disposed in the hollows of thecasings 212 so as to constitute a tube, the plurality ofvibration rods 230 that are disposed in the tube constituted by the elastic links, and the plurality ofelastic chips 220 that are respectively disposed in the hollows of theswell tubes 214 so as to intersect with the hollows. - The
casing 212, thevibration rod 230, and theelastic chip 220 are as described above. Herein, a detailed configuration of theswell tube 214 will be described. - The second
elastic link 260 constituting theswell tube 214 has a similar structure to theelastic link 170 which is described with respect to thehydraulic tube 100. That is, the secondelastic link 260 is formed by bending an elongated steel wire. For example, theelastic link 170 is formed by bending both ends of the steel wire inwards in a longitudinal direction as illustrated inFIG. 3 and then by bending the both ends gathered together toward the center, and thus the secondelastic link 260 has a ring shape. Thus, theelastic link 170 may include first curved portions formed at both ends and second curved portions formed to come into contact with each other on the inner side. Meanwhile, an elongated straight portion is formed between the curved portions. - The second curved portion is bent in the form of a ring, and may be preferably configured such that a lower portion of the ring comes into contact with the straight portion below the ring. Thus, when the both ends of the second
elastic link 260 are pressed in a state where the upward deformation of the secondelastic link 260 is limited, the secondelastic link 260 may be deformed in such a manner that the second curved portions having a ring shape are gathered together on the inner side and press the straight portion below the second curved portions so as to be bent downwards. - Meanwhile, the
elastic chip 220 may be disposed to cover the second curved portions. That is, as illustrated inFIG. 9 , theelastic chip 220 may be disposed in a portion where the second curved portions are gathered together on the inner side. Thus, a deformation due to pressing may be concentrated on theelastic chip 220 which is disposed at a position where the second curved portions are disposed. - The second
elastic links 260 are arranged in a circumferential direction so as to constitute a tube. That is, the plurality of secondelastic links 260 are disposed centering around thevibration rod 230 in the circumferential direction of thevibration rod 230, and thus, the plurality ofelastic links 260 may form a hollow in a direction of an inner diameter. - At this time, in order to appropriately fix the second
elastic link 260, thecasing 212 may have a predetermined step height, but the present invention is not limited thereto. - As described above, when the second
elastic link 220 receives a deformation force in a direction of an inner diameter by a vibration force of theoscillator 300, the secondelastic link 220 may be deformed in the direction of the inner diameter to thereby press theelastic chip 114, and thus, theelastic chip 114 may deform. - The second
elastic link 260 according to the current embodiment may be more stably fixed within thecasing 212, and the second curved portions bent in the form of a ring come into contact with the straight portion disposed below the second curved portions. Thus, the secondelastic link 260 may be more stably deformed in the direction of the inner diameter due to the deformation force in both lateral directions. Accordingly, the secondelastic link 260 may be more stably deformed, and the hydraulic power unit may reliably operate. - Hereinafter, an operation of the
hydraulic power unit 1 will be described. - First, an operation of the amplitude amplification device 200 will be described below.
- As illustrated in
FIG. 7 , when an external force is applied to theelastic chip 220 from theoscillator 300, theelastic chip 220 is deformed into a curved shape with a protruding center portion. Theelastic chip 220 may be repeatedly deformed and restored to the original shape according to the external force applied from theoscillator 300 disposed below thehydraulic power unit 1. - For example, when the
oscillator 300 is deformed, theswell tube 214 is deformed inwards by a deformation force transmitted from theoscillator head 310 to thereby press theelastic chip 220. Thus, the center portion of theelastic chip 220 is deformed into such a curved shape with a protruding center portion. - The vibration of the
oscillator 300 and the deformation of theelastic chip 220 take place in a longitudinal direction of thehydraulic power unit 1. Thus, the capacity of theelastic tube 114 within thehydraulic tube 100 is changed, thereby extruding a fluid filled in the inner hollow 118 within theelastic tube 114 to the outside through theopening 132 which is formed in theconnection jig 130. - Meanwhile, the extruded fluid passes through a predetermined path and a fluid chamber. Then, the fluid changes its direction to flow into the above-mentioned outer hollow 116, which will be described below.
- Meanwhile, the
elastic chip 220 receives a pressing force from thevibration rod 230 and is disposed between thevibration rods 230, and thus, theelastic chip 220 maintains its flat shape in an initial state where no external force is applied thereto from theoscillator 300. - Meanwhile, as described above, not only one
elastic chip 220 but also a plurality of theelastic chips 220 may be stacked on each other. - Thus, when seen from a longitudinal direction of the
hydraulic power unit 1, a hole formed in theelastic chip 220 may be wholly or partially covered other of theelastic chips 220. At this time, as illustrated inFIG. 6 , theelastic chips 220 may be stacked in such a manner that curved surfaces thereof are curved in the same direction or in a direction in which they face each other, but the present invention is not limited thereto. - When the
hydraulic power unit 1 according to the present invention and all members that are internally or externally connected thereto are filled with a fluid and sealed, the fluid within the sealed space may be circulated in a desired direction. - In order to increase an amount and a force of the fluid which is extruded through the
opening 132, a deformation amount of theoscillator 300 is required to be increased. A method of increasing the deformation amount of theoscillator 300 may be classified into a method of increasing a voltage of electric energy to be applied and a method of mechanically stacking a plurality of piezoelectric elements used as theoscillator 300. - In addition, as described above, the amplitude amplification device 200 is disposed between the
oscillator 300 and thehydraulic tube 100, and thus, an amount of fluid which is extruded and inpoured through anextrusion passage 434 and an amount of fluid which is extruded and inpoured through an inlet may be increased, thereby further increasing the output of thehydraulic power unit 1. - Hereinafter, the
hydraulic engine 2 including thehydraulic power unit 1 according to the present invention will be described. -
FIG. 11 is a diagram illustrating thehydraulic engine 2 including thehydraulic power unit 1 according to the embodiment of the present invention.FIG. 12 is a diagram illustrating arear flange 430 of thehydraulic engine 2 according to the embodiment of the present invention.FIG. 13 is a diagram illustrating afront flange 440 of thehydraulic engine 2 according to the embodiment of the present invention.FIG. 14 is a diagram illustrating a flow of a working fluid of thehydraulic engine 2 according to the embodiment of the present invention.FIG. 15 is a diagram illustrating a state where the whole hydraulic force of a working fluid is balanced. - The
hydraulic engine 2 according to the present invention includes thehydraulic power unit 1, a housing, arotor 420 that is rotatably supported within the housing and is provided with arotor blade 422 on the circumference thereof, afluid chamber 450 which is disposed within the housing, and a flange. - The flange includes the
front flange 440 and therear flange 430, and a rotor is disposed between thefront flange 440 and therear flange 430. - The
rear flange 430 includes afixation hole 432 for fixing thehydraulic power unit 1, and anextrusion passage 434. Theextrusion passage 434 is formed so that therotor blade 422 formed in the rotor and the inner hollow 118 of thehydraulic tube 100 included in thehydraulic power unit 1 communicate with each other. - The
front flange 440 includes adischarge hole 442 for discharging a fluid which is inpoured through therotor blade 422, and thefluid chamber 450 disposed in front of thefront flange 440. - The housing is a member constituting an outer shape of the
hydraulic engine 2 according to the current embodiment of the present invention. Therotor 420 and a plurality of thehydraulic power units 1 may be disposed within the housing. - The
rotor 420 is a member which is rotatably disposed within the housing. Therotor 420 includes a plurality of therotor blades 422 that protrude in a direction of the radius of therotor 420 with respect to a rotation axis of therotor 420. Meanwhile, therotor 420 may have a predetermined configuration of, for example, a predetermined double helical gear. - The
output axis 402 may extend from the rotation axis of therotor 420 within a flange or may be formed integrally with the rotation axis of therotor 420. Theoutput axis 402 may be installed so as to protrude to the outside from the housing. - Meanwhile, the housing may be divided into an
upper housing 410 and alower housing 412. A sealing member is disposed between theupper housing 410 and thelower housing 412 so as to prevent the fluid from leaking. -
FIGS. 12 and 13 illustrate a flange. Referring toFIGS. 12 and 13 , the flange forms a frame of thehydraulic engine 2 and may keep thehydraulic power unit 1 in a constant position. - The flange includes the
front flange 440 and therear flange 430. Thefront flange 440 and therear flange 430 are disposed within the housing, and therotor 420 is disposed between thefront flange 440 and therear flange 430. - The
front flange 440 and therear flange 430 are formed in the form of a ring. That is, as illustrated inFIGS. 12 and 13 , thefront flange 440 and therear flange 430 are formed in the form of a ring in which a hollow is formed therein. - The
hydraulic power unit 1 is fixed to therear flange 430. Therear flange 430 includes the predeterminedfixation hole 432. A female screw portion is formed in thefixation hole 432 so as to be coupled with a male screw portion formed in theconnection jig 130. At this time, a plurality of the fixation holes 432 may be formed, and thehydraulic power unit 1 may be fixed to thefixation hole 432. - The
extrusion passage 434 is formed in therear flange 430, and theextrusion passage 434 is connected to thefixation hole 432. Theextrusion passage 434 is disposed between therotor 420 and thehydraulic tube 100. A fluid extruded from the inner hollow 118 within thehydraulic tube 100 may be transmitted to therotor 420 through theextrusion passage 434. Preferably, theextrusion passage 434 forms a tilt angle with respect to therotor blade 422 so that the fluid extruded from thehydraulic tube 100 applies an extrusion force to therotor blade 422 to thereby rotate therotor 420. That is, the fluid extruded through thehydraulic tube 100 applies an extrusion force to therotor blade 422 to thereby rotate therotor 420, thereby generating power. Theinjection chamber passage 438 is formed in therear flange 430. Theinjection chamber passage 438 is connected to theinjection passage 436. A fluid transmitted from therotor 420 may be injected into the side throughhole 160 through theinjection chamber passage 438 and theinjection passage 436. A fluid extruded from theextrusion passage 434 may rotate therotor 420. Thereafter, the fluid passes through thedischarge hole 442 and be transmitted to thefluid chamber 450. Thereafter, the fluid changes its direction and passes through thedischarge hole 444 and theinjection passage 436. And a fluid may be injected into the side throughhole 160 connected to theinjection chamber passage 438 and therear fluid chamber 470. - The
discharge hole 442 is formed in thefront flange 440, and thefluid chamber 450 is formed in front of thefront flange 440. The fluid extruded through theextrusion passage 434 applies an extrusion force to therotor blade 422 to thereby rotate therotor 420. Then, the fluid passes through thefluid chamber 450 and changes its direction to thereby rotate therotational rotor 420 again. Similarly to theextrusion passage 434, thedischarge hole 442 may have a tilt angle. - At this time, the
discharge hole 442 formed in thefront flange 440 and the side throughhole 160 formed in themetal tube 112 of thehydraulic tube 100 are connected to each other through thefluid chamber 450, and thus, a flowing path along which the fluid flows is formed. That is, thedischarge hole 442 formed in thefront flange 440 is configured in such a manner that an extrusion fluid, which flows through the side throughhole 160 formed in themetal tube 112 to thereby rotate therotor 420, applies rotatory power to therotational rotor 420 through thefluid chamber 450 and a fluid movement path so as to flow into the outer hollow 116 through the side throughhole 160. Thus, the fluid extruded from the inner hollow 118 may rotate therotor 420 and then flow into the outer hollow 116. Therefore, the fluid may be extruded to the inside or outside of thehydraulic tube 100, and the extrusion and inpouring of the fluid with respect to thehydraulic tube 100 may be bidirectionally performed at the same time, thereby rotating therotor 420 in one direction. Meanwhile, thepredetermined fluid chamber 450 having the working fluid gathered therein may be included in the fluid movement path of the outer hollow 116. - Preferably,
hydraulic power units 1 in an even number are installed within thehydraulic engine 2 so as to be associated with each other, and thus, thehydraulic power units 1 may replenish a balance force. - That is, as illustrated in
FIG. 14 , a firsthydraulic power unit 1A and a secondhydraulic power unit 1 B may be disposed in onehydraulic engine 2. At this time, eachhydraulic power unit 1 may be disposed in a circumferential direction of therotor 420. A working fluid extruded from the firsthydraulic power unit 1A may rotate therotor 420, may be discharged to thefluid chamber 450 through thedischarge hole 442, may change its direction through thefluid chamber 450, may rotate another rotor through anotherdischarge hole 444, and then may be drawn into the firsthydraulic power unit 1 A through the side throughhole 160, theinjection chamber passage 438 and theinjection passage 436 . - The above-mentioned operation may be inversely repeated.
- In addition, a complementary operation between fluids is performed between the first
hydraulic power unit 1A and the secondhydraulic power unit 1 B through thefluid chamber 450 and theinjection chamber passage 438, and rotatory power of the rotor may be constantly maintained during such a complementary operation between fluids. - As illustrated in
FIG. 13 , a force applied to a fluid may be constantly balanced by a complementary operation so that a strong forward driving force of theoscillator 300 of the even-numberedhydraulic power units 1A and a weak backward driving force of theoscillator 300 of the even-numberedhydraulic power unit 1 B are combined with each other through a forward driving fluid that is extruded from thefluid chamber 450 and theinjection chamber passage 438. - Meanwhile, a
predetermined accumulator 460 may be provided in a fluid movement path between thedischarge hole 442 and the side throughhole 160. Theaccumulator 460 adjusts a flow rate of a fluid. Theaccumulator 460 may be configured to replenish a fluid when a flow rate of the fluid changes due to temperature, pressure, or loss of the fluid or to appropriately adjust a flow rate of the fluid. - The
hydraulic power unit 1 extrudes and inpours a fluid in a tangential direction of one surface of therotor 420 toward a plurality of therotor blades 422 that are disposed in therotor 420. - Preferably, the
hydraulic engine 2 may further include anoperational module 500 that drives thehydraulic power unit 1, adjusts a number of rotations and a torque of the rotor, and includes a secondary battery as a driving power source. - In the
hydraulic engine 2 according to the present invention, an inverse piezoelectric effect is mainly used by theceramic oscillator 300 that is included in thehydraulic power unit 1 constituting thehydraulic engine 2. Based on the inverse piezoelectric effect, a displacement and strong force occur in theceramic oscillator 300 according to a driving voltage, a driving frequency, and stiffness (rigidity) of theceramic oscillator 300. Since a working fluid to be extruded strongly presses therotor blade 422 due to the displacement and strong force, a torque for rotating therotor 420 may be extremely increased. In particular, a flow rate of the working fluid may be arbitrarily changed by adjusting a time to apply a driving signal. - Meanwhile, the
hydraulic engine 2 according to the present invention does not require additional power or fuel except for power of a secondary battery included in a driving module, which is used to generate a signal to be applied to theceramic oscillator 300 included in thehydraulic power unit 1. Accordingly, thehydraulic engine 2 may be continuously driven within a lifespan range of theceramic oscillator 300 and a secondary battery for supplying power for applying a driving signal to theceramic oscillator 300 without supplying additional power or fuel. - In addition, the
hydraulic engine 2 according to the present invention includes an amplitude amplification device, and thus, a vibration amplitude according to theoscillator 300 may be further amplified. Accordingly, thehydraulic engine 2 may have a larger output. - As described above, according to the one or more of the above embodiments of the present invention, in a hydraulic engine, an inverse piezoelectric effect is mainly used in a ceramic oscillator included in a hydraulic power unit of the hydraulic engine. Based on the inverse piezoelectric effect, a displacement and strong force occur in the ceramic oscillator according to a driving voltage, a driving frequency, and stiffness (rigidity) of the ceramic oscillator. Since a working fluid to be extruded strongly presses a rotor blade due to the displacement and strong force, a torque for rotating a rotor may be extremely increased. In particular, a flow rate of the working fluid may be arbitrarily changed by adjusting a time to apply a driving signal.
- Meanwhile, the hydraulic engine according to the present invention does not require additional power or fuel except for power of a secondary battery included in a driving module, which is used to generate a signal to be applied to the ceramic oscillator included in the hydraulic power unit. Accordingly, the hydraulic engine may be continuously driven within a lifespan range of the ceramic oscillator and a secondary battery for supplying power for applying a driving signal to the ceramic oscillator without supplying additional power or fuel.
- In addition, the hydraulic engine according to the present invention includes an amplitude amplification device, and thus, a vibration amplitude according to an oscillator may be further amplified. Accordingly, the hydraulic engine may have a larger output.
- It should be understood that the exemplary embodiments described therein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should typically be considered as available for other similar features or aspects in other embodiments.
- While one or more embodiments of the present invention have been described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention as defined by the following claims.
Claims (16)
- A hydraulic engine comprising:a hydraulic power unit (1) comprising a hydraulic tube (100) comprising a hollow portion having an opened front end and being filled with a fluid, an amplitude amplification device (200) that is disposed at the rear side of the hydraulic tube (100), an oscillator (300) that is disposed at the rear side of the amplitude amplification device (200) so as to be deformed and increases and decreases a pressure within the hydraulic tube (100), and an oscillator head (310) that is attached to a front end of the oscillator (300),wherein the hydraulic tube (100) extends in a longitudinal direction, comprises a metal tube (112) formed on the outside thereof and an elastic tube (114) formed on the inside thereof, and is configured in the form of a double tube having an outer hollow (116) and an inner hollow (118),wherein the amplitude amplification device (200) comprises a casing (212) having a hollow formed therein, a swell tube (214) that is disposed within the casing (212) and has a cylindrical hollow therein, a plurality of vibration rods (230) that are disposed in the hollow of the swell tube (214), and an elastic chip (220) that is disposed in the hollow of the swell tube (214), intersects with the hollow, and is disposed between the plurality of vibration rods (230),wherein the oscillator (300) moves bidirectionally and changes a pressure within the hydraulic tube (100) by applying deformation force to the vibration rod (230) according to its deformation so that a fluid within the hydraulic tube (100) is extruded to the outside or flows into the hydraulic tube (100).
- The hydraulic engine (2) of claim 1, wherein the oscillator (300) is deformed in a direction toward the inside of the hollow portion of the hydraulic tube (100) and in an opposite direction when electricity is applied thereto by an inverse piezoelectric effect.
- The hydraulic engine (2) of claim 1, wherein the hydraulic tube (100) comprises a front position fixation holder (181) and a rear position fixation holder (180) that is disposed within the metal tube (112) and comes into contact with a front side and a rear side of the elastic tube (114), and a connection jig (130) that is disposed at a front end of the metal tube (112) and is disposed so as to come into contact with the front side of the front position fixation holder(181) of the elastic tube (114),
wherein the rear position fixation holder(180) is disposed so as to come into contact via a seal ring (150) with at least one vibration rod (230) included in the amplitude amplification device (200),
wherein at least a portion of the connection jig (130) seals the outer hollow (116), wherein an opening is formed in at least a portion of the connection jig (130) so as to cause the inner hollow (118) and the outside to communicate with each other, and
wherein a side through hole (160) is formed at one side of the metal tube (112) so as to cause the outer hollow(116) and the outside to communicate with each other. - The hydraulic engine (2) of claim 3,
wherein the hydraulic tube (100) comprises a plurality of first elastic links (170), wherein the elastic tube (114) is formed as a corrugated pipe having a plurality of corrugations extending in a longitudinal direction,
wherein the first elastic link (170) is disposed so as to come into contact with a concave portion of the corrugation and to extend in a longitudinal direction along the corrugation, and
wherein one end of the first elastic link (170) comes into contact with the connection jig (130) through the front position fixation holder (181), the other end thereof comes into contact with the vibration rod (230) through the rear position fixation holder(180), and the elastic tube (114) is pressed in a horizontal direction according to a deformation force of the vibration rod (230). - The hydraulic engine (2) of claim 4,
wherein the first elastic link (170) is formed by bending an elongated steel wire, wherein the first elastic link (170) comprises first curved portions, which are both sides of the steel wire being bent inwards in a longitudinal direction, and second curved portions, which are both ends of the steel wire being bent and gathered together toward the center through the first curved portions, and
wherein the second curved portion has a ring shape. - The hydraulic engine (2) of claim 5, wherein a lower portion of the second curved portion comes into contact with at least a portion between the first curved portions.
- The hydraulic engine (2) of claim 1, wherein the elastic chip (220) is formed of a material having an elastic restoring force, the elastic chip (220) having a form of a circular plate with a protruding central portion, and is provided with a plurality of holes (222) formed along a circumference thereof.
- The hydraulic engine (2) of claim 7, wherein the holes (222) are formed in a fan shape with a portion of the circumference of the elastic chip (220) forming an arc thereof.
- The hydraulic engine (2) of claim 8, wherein the swell tube (214) comprises a plurality of second elastic links (260) that are disposed along a circumferential surface of the vibration rod (230).
- The hydraulic engine (2) of claim 9,
wherein the second elastic link (260) is formed by bending an elongated steel wire,
wherein the second elastic link (260) comprises first curved portions, which are both sides of the steel wire being bent inwards in a longitudinal direction, and second curved portions, which are both ends of the steel wire being bent and gathered together toward the center through the first curved portions, and wherein the second curved portion has a ring shape. - The hydraulic engine (2) of claim 10, wherein a lower portion of the second curved portion comes into contact with at least a portion between the first curved portions.
- The hydraulic engine (2) of claim 11, wherein the elastic chip (220) is disposed at a position overlapping a position at which the second curved portion is disposed.
- A hydraulic engine (2) according to any one of the preceding claims further comprising:a housing;
a rotor (420) that is rotatably supported within the housing and has a rotor blade (422) disposed on the circumference thereof; and
a flange that is disposed within the housing,
wherein the flange comprises a front flange (440) and a rear flange (430), and the rotor (420) is disposed between the front flange (440) and the rear flange (430),
wherein the rear flange (430) comprises a fixation hole(432) for fixing the hydraulic power unit (1) and an extrusion passage (434),
wherein the extrusion passage (434) is configured to cause the rotor blade (422) of the rotor(420) and an inner hollow(118) of a hydraulic tube (100) included in the hydraulic power unit (1) to communicate with each other, and
wherein the front flange (440) comprises a fluid chamber (450) and a discharge hole (442) so that a fluid inpoured through the rotor blade (422) is bidirectionally discharged. - The hydraulic engine (2) of claim 13, wherein the extrusion passage (434) has a tilt angle with respect to the rotor blade (422) so that the fluid extruded from the hydraulic tube (100) applies an extrusion force to the rotor blade (422) to thereby rotate the rotor.
- The hydraulic engine (2) of claim 14, wherein the fluid chamber (450) and the discharge hole (442) formed in front of the front flange (440) and a side through hole(160) formed in a metal tube (112) of the hydraulic tube (100) are connected to each other so that the fluid flows therebetween.
- The hydraulic engine (2) of claim 13, further comprising an operational module (500) that drives the hydraulic power unit (1), adjusts a number of rotations and torque of the rotor (420), and comprises a secondary battery as a driving power source.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES13189335.6T ES2562483T3 (en) | 2013-10-18 | 2013-10-18 | Hydraulic motor that includes a hydraulic power unit |
EP13189335.6A EP2863051B1 (en) | 2013-10-18 | 2013-10-18 | Hydraulic engine including hydraulic power unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13189335.6A EP2863051B1 (en) | 2013-10-18 | 2013-10-18 | Hydraulic engine including hydraulic power unit |
Publications (2)
Publication Number | Publication Date |
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EP2863051A1 EP2863051A1 (en) | 2015-04-22 |
EP2863051B1 true EP2863051B1 (en) | 2015-12-30 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP13189335.6A Not-in-force EP2863051B1 (en) | 2013-10-18 | 2013-10-18 | Hydraulic engine including hydraulic power unit |
Country Status (2)
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EP (1) | EP2863051B1 (en) |
ES (1) | ES2562483T3 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US6071088A (en) * | 1997-04-15 | 2000-06-06 | Face International Corp. | Piezoelectrically actuated piston pump |
US6637200B2 (en) * | 2001-10-19 | 2003-10-28 | Smiths Industries Aerospace Actuation Systems, Inc. | Membrane-activated hydraulic actuator |
JP4677933B2 (en) * | 2005-04-14 | 2011-04-27 | セイコーエプソン株式会社 | Pump and fluid system |
US8267675B2 (en) * | 2008-06-16 | 2012-09-18 | GM Global Technology Operations LLC | High flow piezoelectric pump |
EP2587062B1 (en) * | 2011-10-28 | 2014-08-06 | Lucas Ihsl | Hydraulic power unit having ceramic oscillator |
-
2013
- 2013-10-18 EP EP13189335.6A patent/EP2863051B1/en not_active Not-in-force
- 2013-10-18 ES ES13189335.6T patent/ES2562483T3/en active Active
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EP2863051A1 (en) | 2015-04-22 |
ES2562483T3 (en) | 2016-03-04 |
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