CN113357207A - Piston type energy accumulator capable of generating power - Google Patents
Piston type energy accumulator capable of generating power Download PDFInfo
- Publication number
- CN113357207A CN113357207A CN202110692157.5A CN202110692157A CN113357207A CN 113357207 A CN113357207 A CN 113357207A CN 202110692157 A CN202110692157 A CN 202110692157A CN 113357207 A CN113357207 A CN 113357207A
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- CN
- China
- Prior art keywords
- piston
- end cover
- coil
- oil
- shell
- 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
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
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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
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/08—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
- F15B2201/312—Sealings therefor, e.g. piston rings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
The invention belongs to the field of energy storage devices of hydraulic systems, and particularly discloses a piston type energy accumulator capable of generating power, which comprises a shell, a gas end cover, an oil end cover and a piston, wherein: the gas end cover and the oil end cover are respectively arranged at two ends of the shell, a coil is arranged in the gas end cover, and the coil penetrates through the gas end cover to be connected with an external electricity storage and utilization device; the piston is movably arranged in the shell and is a convex piston, an annular magnet is arranged on a boss of the convex piston, and the annular magnet penetrates through the coil when the piston moves in the shell. The invention can not only absorb the pressure pulsation in the medium and high pressure hydraulic system and reduce the noise, but also the piston reciprocates between the air cavity and the oil cavity to drive the annular magnet to form a moving magnetic field with uneven intensity, the moving magnetic field generates the change of magnetic flux when passing through the coil so as to generate the electromagnetic induction phenomenon, and the vibration energy can be converted into electric energy to supply power for the electricity storage device or the electricity load.
Description
Technical Field
The invention belongs to the field of energy storage devices of hydraulic systems, and particularly relates to a piston type energy accumulator capable of generating power.
Background
In the medium and high pressure hydraulic systems, due to the working principle and structural characteristics of the hydraulic pump, the actions of the control element and the actuating mechanism and the like, flow and pressure pulsation inevitably exist in a hydraulic loop, so that vibration of pipelines and elements and even noise are easily caused. While accumulators, as a type of energy storage device in hydraulic systems, are often used to absorb pulsations and reduce noise.
The energy recovery can be realized by utilizing the vibration energy generated by the flow and the pressure pulsation in the energy accumulator to realize the energy recovery, thereby improving the energy utilization rate and being an important way for saving energy. 2019108974584 discloses a power generation device, wherein one end of the power generation device is communicated with an accumulator through a pipeline, the other end of the power generation device is communicated with an applied hydraulic system, the accumulator is continuously filled with liquid or drained of liquid, and the power generation device utilizes pressure oil flowing into or out of the accumulator to drive a turbine device on the power generation device to generate power; patent 2020105796874 collects ocean wave energy through an energy capturing device, then transfers the energy through a mechanical transmission device and converts the energy into pressure energy in an energy accumulator, the energy accumulator outputs high-pressure oil to drive a hydraulic motor, and the energy accumulator is converted into mechanical energy actually and does not directly realize the conversion of electric energy.
From the use condition of the existing energy accumulator, most of the energy accumulators are purely used for absorbing pressure pulsation and reducing noise, the vibration energy generated in the process is completely dissipated, and the few energy accumulators utilize the energy storage function of the energy accumulator and are matched with an external power generation system to generate power by releasing the pressure energy of the energy accumulator, so that the number of intermediate links is large, the whole system is relatively large and complex, and the transmission efficiency is low.
Disclosure of Invention
In view of the above defects or improvement needs in the prior art, the invention provides a piston type energy accumulator capable of generating power, which aims to directly absorb pressure pulsation of a medium-pressure and high-pressure hydraulic system by using the energy accumulator and directly convert dissipated vibration energy into electric energy to supply power to an electricity storage device or an electricity load so as to realize energy recovery.
In order to achieve the purpose, the invention provides a piston type energy accumulator capable of generating power, which comprises a shell, a gas end cover, an oil end cover and a piston, wherein:
the gas end cover and the oil end cover are respectively arranged at two ends of the shell, a coil is arranged in the gas end cover, and the coil penetrates through the gas end cover to be connected with an external electricity storage and utilization device; the piston is movably arranged in the shell and is a convex piston, an annular magnet is arranged on a boss of the convex piston, and the annular magnet penetrates through the coil when the piston moves in the shell.
Preferably, the axial length of the ring magnet is equal to the axial length of the coil and equal to half of the stroke of the piston.
Preferably, the boss of the male piston is provided with a plurality of annular grooves, and the annular magnet is embedded in the annular grooves.
Preferably, end covers are mounted on the boss end face of the piston and the end face of the gas end cover and are respectively used for axially limiting the annular magnet and the coil.
It is further preferred that both sides of the piston are in contact with the interior of the housing with a piston seal disposed therebetween.
Preferably, the coil is connected with one end of a sealed aviation plug through a lead, the other end of the sealed aviation plug is connected with an external electricity storage and utilization device, and the sealed aviation plug is fixed in the air end cover through threads.
Preferably, an air end cover seal is arranged between the air end cover and the housing, and an oil end cover seal is arranged between the oil end cover and the housing.
Preferably, an air cavity is formed between the air end cover and the piston and is connected with an external air channel through an opening on the air end cover; an oil cavity is formed between the oil end cover and the piston and is connected with an external hydraulic system through an opening on the oil end cover.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the piston type energy accumulator integrates power generation and energy supply, particularly, by designing the convex piston and the coil which are arranged in the energy accumulator, pressure pulsation in a medium-pressure hydraulic system and a high-pressure hydraulic system can be absorbed, noise is reduced, meanwhile, the piston reciprocates between the air cavity and the oil cavity to drive the annular magnet to form a moving magnetic field with uneven strength, the moving magnetic field generates magnetic flux change when passing through the coil so as to generate an electromagnetic induction phenomenon, vibration energy can be converted into electric energy, and power is supplied to an electricity storage device or an electric load.
2. The invention directly utilizes the motion form of the reciprocating vibration of the piston instead of the energy storage function of the energy accumulator, the whole power generation process is carried out in the piston type energy accumulator, the structure is simple, an external energy conversion mechanism is not needed, and the invention is a non-contact power generation form, and the magnet (regarded as a load) acts on the piston to accelerate the stability of a hydraulic system and quickly reduce the impact.
3. The invention sets the axial length of the magnet equal to the axial length of the coil and is half of the movement stroke of the piston, thereby ensuring the movement space of the piston, avoiding collision, simultaneously enabling the piston to cut the magnetic induction line to move when moving close to the oil end and the gas end in the whole stroke, and converting the maximum efficiency into electric energy.
4. The invention designs the coil arranged on the end cover of the gas end, avoids the defects caused by embedding the coil into the shell, such as influence on the dynamic sealing property of the piston, easy generation of electromagnetic shielding and the like, and simultaneously, the annular boss is arranged on the piston, so that a plurality of annular magnets can be more stably arranged.
Drawings
Fig. 1 is a schematic structural diagram of a piston accumulator capable of generating power according to an embodiment of the invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1-gas end cover, 2-gas end cover seal, 3-coil, 4-piston end cover, 5-coil end cover, 6-ring magnet, 7-piston, 8-piston seal, 9-shell, 10-oil end cover seal, 11-oil end cover, 12-oil cavity, 13-air cavity, 14-aviation plug with seal.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The piston type energy accumulator capable of generating power provided by the embodiment of the invention is shown in fig. 1, and comprises a shell 9, a gas end cover 1, an oil end cover 11 and a piston 7, wherein:
the gas end cover 1 and the oil end cover 11 are respectively arranged at two ends of the shell 9, a coil 3 is arranged in the gas end cover 1, and the coil 3 passes through the gas end cover 1 to be connected with an external electricity storage and utilization device; an air cavity 13 is formed between the air end cover 1 and the piston 7, the air cavity 13 is connected with an external air channel through an opening on the air end cover 1, and an air charging and discharging valve is arranged at the connection part; an oil cavity 12 is formed between the oil end cover 11 and the piston 7, the oil cavity 12 is connected with an external hydraulic system pipeline through an opening on the oil end cover 11, and a liquid charging and discharging valve is arranged at the connection position; the piston 7 is movably arranged in the shell 9, the piston 7 is a convex piston, and a boss of the convex piston is provided with an annular magnet 6.
Specifically, a plurality of annular grooves are formed in a boss of the convex piston, a plurality of annular magnets 6 are embedded into the annular grooves, N, S poles of the annular magnets 6 are arranged along the axial direction, when the energy accumulator works in a medium-pressure and high-pressure hydraulic system, the piston 7 reciprocates between the air cavity 13 and the oil cavity 12 to drive the annular magnets 6 to form an uneven moving magnetic field, the moving magnetic field generates magnetic flux changes when passing through the coil 3 so as to generate an electromagnetic induction phenomenon, vibration energy can be converted into electric energy, and then the coil 3 outputs the electric energy to an external electricity storage and utilization device.
Further, the axial length of ring magnet 6 equals the axial length of coil 3, and equals piston 7 motion stroke's half, can let the piston when pressing close to oil end and pressing close to this whole stroke motion of gas end, can both cut the motion of magnetic induction line, and maximum efficiency converts the electric energy into.
Further, a piston end cover 4 is mounted on the boss end face of the piston 7, and the piston end cover 4 is used for axially limiting the annular magnet 6; and a coil end cover 5 is arranged on the end surface of the gas end cover 1, and the coil end cover 5 is used for axially limiting the coil 3.
Further, the coil 3 is connected with one end of a sealed aviation plug 14 through a lead, the other end of the sealed aviation plug 14 is connected with an external electricity storage and utilization device through a rectification circuit, so that converted electric energy is input into the electricity storage device or an electricity utilization load, and the sealed aviation plug 14 is fixed in the air end cover 1 through threads.
Further, two sides of the piston 7 are in contact with the inside of the shell 9, and a piston seal 8 is arranged between the two sides; an air end cover seal 2 is arranged between the air end cover 1 and the shell 9, and an oil end cover seal 10 is arranged between the oil end cover 11 and the shell 9.
The traditional power generation device is placed between an energy accumulator and a connecting pipeline of a hydraulic system, a turbine is driven to rotate by utilizing the flow of hydraulic oil during impact, and a piston type permanent magnet is driven to reciprocate by utilizing electromagnetic force and spring force, so that the energy conversion links are many, and the piston is continuously extruded with a piezoelectric stack and is easy to damage; compared with the traditional design, the energy accumulator has the advantages that a power generation function is added to the energy accumulator, namely, the energy accumulator is integrated into a whole, meanwhile, the coil is designed on the inner gas end cover, the problem that the coil is placed on the outer side of the energy accumulator, due to the structural characteristics of the energy accumulator, electromagnetic shielding can be generated, and power generation cannot be achieved is solved.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. Piston accumulator capable of generating electricity, characterized by comprising a shell (9), a gas end cover (1), an oil end cover (11) and a piston (7), wherein:
the gas end cover (1) and the oil end cover (11) are respectively arranged at two ends of the shell (9), a coil (3) is arranged in the gas end cover (1), and the coil (3) penetrates through the gas end cover (1) to be connected with an external electricity storage and utilization device; the piston (7) is movably arranged in the shell (9), the piston (7) is a convex piston, a boss of the convex piston is provided with an annular magnet (6), and when the piston (7) moves in the shell, the annular magnet (6) penetrates through the coil (3).
2. The energy accumulator according to claim 1, characterized in that the axial length of the ring magnet (6) is equal to the axial length of the coil (3) and equal to half the stroke of the piston (7) movement.
3. The energy accumulator according to claim 1, characterized in that the projection of the male piston is provided with a plurality of annular grooves in which the ring magnets (6) are embedded.
4. The energy accumulator according to claim 1, characterized in that the end faces of the boss of the piston (7) and of the gas end cap (1) are fitted with end caps for axial retention of the ring magnet (6) and of the coil (3), respectively.
5. The energy accumulator according to claim 1, characterized in that the piston (7) is in contact with the interior of the housing (9) on both sides and a piston seal (8) is arranged between them.
6. The accumulator according to claim 1, characterised in that the coil (3) is connected by a wire to one end of a sealed aviation plug (14), the other end of the sealed aviation plug (14) being connected to an external electricity storage device, the sealed aviation plug (14) being screwed into the gas end cap (1).
7. The energy accumulator according to claim 1, characterized in that a gas end cap seal (2) is provided between the gas end cap (1) and the housing (9), and an oil end cap seal (10) is provided between the oil end cap (11) and the housing (9).
8. The energy accumulator according to any of claims 1-7, characterized in that an air chamber (13) is formed between the gas end cap (1) and the piston (7), which air chamber (13) is connected to an external air passage through an opening in the gas end cap (1); an oil cavity (12) is formed between the oil end cover (11) and the piston (7), and the oil cavity (12) is connected with an external hydraulic system through an opening on the oil end cover (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692157.5A CN113357207A (en) | 2021-06-22 | 2021-06-22 | Piston type energy accumulator capable of generating power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692157.5A CN113357207A (en) | 2021-06-22 | 2021-06-22 | Piston type energy accumulator capable of generating power |
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| Publication Number | Publication Date |
|---|---|
| CN113357207A true CN113357207A (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110692157.5A Pending CN113357207A (en) | 2021-06-22 | 2021-06-22 | Piston type energy accumulator capable of generating power |
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| Country | Link |
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| CN (1) | CN113357207A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163456A (en) * | 2022-08-05 | 2022-10-11 | 安徽工程大学 | High-strength sealing compressor piston |
| CN115163608A (en) * | 2022-07-11 | 2022-10-11 | 浙江工业大学 | Hydraulic cylinder integrated with variable magnetic general speed sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005015948A1 (en) * | 2005-04-07 | 2006-10-12 | Festo Ag & Co | Fluid component e.g. fluid actuator, has solar cell arrangements for converting kinetic energy of piston moving in cylinder into electrical energy for operating radio communication device which transmits sensor and control signals |
| CN101243525A (en) * | 2005-06-29 | 2008-08-13 | Scireq科学呼吸设备公司 | Self-actuated cylinder and oscillation spirometer |
| KR20100067189A (en) * | 2008-12-11 | 2010-06-21 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Actuator of construction machine with generation function |
| CN103953608A (en) * | 2014-05-09 | 2014-07-30 | 济南优柏电子科技有限公司 | Magnetofluid-driven straight reciprocating motion structure and application method thereof |
| JP2015190480A (en) * | 2014-03-27 | 2015-11-02 | マツダ株式会社 | Hydraulic accumulator and vehicle travel control device including the same |
| CN107605847A (en) * | 2017-08-07 | 2018-01-19 | 浙江大学宁波理工学院 | The gas spring device of linear electric motors driving |
-
2021
- 2021-06-22 CN CN202110692157.5A patent/CN113357207A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005015948A1 (en) * | 2005-04-07 | 2006-10-12 | Festo Ag & Co | Fluid component e.g. fluid actuator, has solar cell arrangements for converting kinetic energy of piston moving in cylinder into electrical energy for operating radio communication device which transmits sensor and control signals |
| CN101243525A (en) * | 2005-06-29 | 2008-08-13 | Scireq科学呼吸设备公司 | Self-actuated cylinder and oscillation spirometer |
| KR20100067189A (en) * | 2008-12-11 | 2010-06-21 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Actuator of construction machine with generation function |
| JP2015190480A (en) * | 2014-03-27 | 2015-11-02 | マツダ株式会社 | Hydraulic accumulator and vehicle travel control device including the same |
| CN103953608A (en) * | 2014-05-09 | 2014-07-30 | 济南优柏电子科技有限公司 | Magnetofluid-driven straight reciprocating motion structure and application method thereof |
| CN107605847A (en) * | 2017-08-07 | 2018-01-19 | 浙江大学宁波理工学院 | The gas spring device of linear electric motors driving |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163608A (en) * | 2022-07-11 | 2022-10-11 | 浙江工业大学 | Hydraulic cylinder integrated with variable magnetic general speed sensor |
| CN115163456A (en) * | 2022-08-05 | 2022-10-11 | 安徽工程大学 | High-strength sealing compressor piston |
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