CN219974972U - Piston cylinder energy storage system with piston rod for discharging oil and pressurizing piston - Google Patents
Piston cylinder energy storage system with piston rod for discharging oil and pressurizing piston Download PDFInfo
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- CN219974972U CN219974972U CN202321160470.5U CN202321160470U CN219974972U CN 219974972 U CN219974972 U CN 219974972U CN 202321160470 U CN202321160470 U CN 202321160470U CN 219974972 U CN219974972 U CN 219974972U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 46
- 238000007599 discharging Methods 0.000 title claims abstract description 16
- 239000011261 inert gas Substances 0.000 claims abstract description 28
- 238000003860 storage Methods 0.000 claims description 55
- 238000010248 power generation Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 12
- 230000005611 electricity Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
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Abstract
The utility model discloses a piston cylinder energy storage system with a piston rod for discharging oil and pressurizing the piston, which is provided by the utility model, in the process of releasing energy, firstly, oil in a second inner cavity flows through a second two-position three-way reversing valve through the first two-position three-way reversing valve and is output to a hydraulic motor, and the hydraulic motor drives a generator to work so as to generate electricity to feed back to a power grid; when the pressure of the inert gas in the first inner cavity is reduced after the inert gas is released for a certain period of time, the first two-position three-way reversing valve is reversed at the moment, so that the second inner cavity is in a pressure release state, and the pressure of the inert gas is fully acted on the piston rod and used for pushing the piston rod to move downwards, so that the area of the piston rod bearing the inert gas is correspondingly increased, the output pressure of the inert gas is further improved, and the energy release efficiency in the hydraulic energy storage technology is improved.
Description
Technical Field
The utility model relates to the technical field of energy storage, in particular to a piston cylinder energy storage system with a piston rod for discharging oil and pressurizing a piston.
Background
The development of new energy technology is a great strategy for realizing sustainable development of human beings, and various energy storage devices become an important subject which must be solved by the new energy strategy. At present, the more mature new energy storage technologies mainly comprise two types: one is a hydraulic energy storage technology; one type is battery energy storage technology.
For the hydraulic energy storage technology, the engineering construction cost is huge, the energy storage density is relatively low, the energy conversion efficiency is low, and long-distance transmission is often required when the electric power is used; but also can have an irreversible effect on the environment of the reservoir site. Therefore, the method is not suitable for the application of the existing power generation field, the ocean new energy power generation field and the distributed energy storage users.
For the storage battery energy storage technology, the chemical storage battery in the prior art has the defects of short energy storage life, high total period cost of a main machine, low response frequency, easy heating and explosion and the like. And the storage battery has limited rare metal reserves, and the disassembly cost and the environmental protection treatment cost after the service life are not good.
In contrast, the existing hydraulic energy storage technology and production process are mature, the productivity is high, and the large-scale production and combination are convenient. The existing hydraulic energy storage technology has the defect that the efficiency of energy release needs to be improved, and the existing hydraulic piston type energy storage device can only release one third of nominal power of rated volume multiplied by rated pressure.
Disclosure of Invention
The utility model mainly aims to provide a piston cylinder energy storage system with a piston rod for discharging oil and pressurizing a piston, and aims to solve the problem that the efficiency is required to be improved when energy is released in the existing hydraulic energy storage technology.
In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:
a piston cylinder energy storage system with a piston rod for discharging oil and pressurizing a piston comprises a cylinder storage barrel, a piston rod, an oil storage barrel, a first two-position three-way reversing valve, a second two-position three-way reversing valve, a generator, a hydraulic motor, a hydraulic pump, an electric motor and an oil tank; the piston is arranged in the inner cavity of the air cylinder in a sliding fit manner; one end of the piston rod is connected with the piston; the piston rod is arranged in the air storage cylinder in a sliding penetrating way and is in dynamic seal with the air storage cylinder; the other end of the piston rod is arranged in the oil storage cylinder in a sliding penetrating way and is in dynamic seal with the oil storage cylinder; the piston divides the internal space of the cylinder barrel into a first inner cavity and a second inner cavity; the second inner cavity is closer to the oil storage cylinder than the first inner cavity; the piston rod and the oil storage cylinder are combined to form an oil storage chamber; the piston rod is a circular rod;
the first inner cavity is filled with inert gas; the inert gas is nitrogen; the first two-position three-way reversing valve is respectively communicated with the second inner cavity, the oil tank and the oil storage chamber; the second two-position three-way reversing valve is respectively communicated with the inlet end of the hydraulic motor, the oil storage chamber and the outlet end of the hydraulic pump; the motor is in driving connection with the hydraulic pump; the inlet end of the hydraulic pump and the outlet end of the hydraulic motor are both communicated with the oil tank; the hydraulic motor is drivingly connected to the generator.
Preferably, the device further comprises an overflow valve; the first two-position three-way reversing valve, the second two-position three-way reversing valve and the oil storage chamber are all communicated with the overflow valve.
Preferably, the motor is a motor for electric power generation; the generator is a motor for electric power generation.
Preferably, the hydraulic pump is a variable hydraulic pump motor dual-purpose oil pump; the hydraulic motor is a variable hydraulic pump motor dual-purpose oil pump.
Preferably, the system is arranged in a tower of the wind generating set.
Preferably, the system is configured to: when the generated energy of the wind generating set is surplus, the wind generating set drives the motor to store energy; when the generated energy of the wind generating set is insufficient, electric energy is output to feed back to the power grid.
Preferably, the oil storage cylinder is provided with an oil inlet and an oil outlet communicated with the oil storage chamber; the first two-position three-way reversing valve and the second two-position three-way reversing valve are both communicated with the oil inlet and the oil outlet.
Preferably, the second two-position three-way reversing valve is provided with a stop valve.
Preferably, the lower end of the oil storage cylinder is also provided with a variable cross-section booster.
Preferably, the lower end of the oil storage cylinder is also provided with a partial pressure section pressurizing control valve.
Compared with the prior art, the utility model has at least the following beneficial effects:
in the piston cylinder energy storage system with the piston rod for discharging oil and pressurizing the piston, in the process of releasing energy, firstly, the first two-position three-way reversing valve is arranged, so that oil in the second inner cavity flows through the second two-position three-way reversing valve and then is output to the hydraulic motor, and the hydraulic motor drives the generator to work so as to generate electricity to feed back to a power grid; when the pressure of the inert gas in the first inner cavity is released for a certain period of time, the first two-position three-way reversing valve is reversed at the moment, so that the second inner cavity is in a pressure relief state, the pressure of the inert gas is directly acted on the piston rod and is only used for pushing the piston rod to move downwards, namely the piston rod extrudes oil in the oil storage chamber to be discharged, the hydraulic motor is driven to generate electricity to feed back to a power grid after flowing through the second two-position three-way reversing valve, the pressure of the inert gas borne by the piston rod is correspondingly improved, the output pressure of the inert gas is further improved, and therefore the energy release efficiency in the hydraulic energy storage technology is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of a piston cylinder energy storage system with a piston rod for discharging oil and pressurizing a piston.
Reference numerals illustrate:
1. a cylinder storage barrel; 2. a piston rod; 3. an oil storage cylinder; 4. a first two-position three-way reversing valve; 5. an overflow valve; 6. a second two-position three-way reversing valve; 7. a generator; 8. a hydraulic motor; 9. a hydraulic pump; 10. a motor; 11. and an oil tank.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
The utility model provides a piston cylinder energy storage system with a piston rod for discharging oil and pressurizing a piston.
Referring to fig. 1, in an embodiment of a piston cylinder energy storage system with a piston rod and an oil discharging piston for pressurizing, the piston cylinder energy storage system with a piston rod and an oil discharging piston for pressurizing according to the present utility model includes a cylinder barrel 1, a piston rod 2, an oil storage barrel 3, a first two-position three-way reversing valve 4, a second two-position three-way reversing valve 6, a generator 7, a hydraulic motor 8, a hydraulic pump 9, an electric motor 10 and an oil tank 11; the piston is arranged in the inner cavity of the air storage cylinder barrel 1 in a sliding fit manner; one end of the piston rod 2 is connected with the piston; the piston rod 2 is arranged in the air storage cylinder 1 in a sliding way and forms dynamic seal with the air storage cylinder 1; the other end of the piston rod 2 is arranged in the oil storage cylinder 3 in a sliding way and forms dynamic seal with the oil storage cylinder 3; the piston divides the inner space of the cylinder storage barrel 1 into a first inner cavity and a second inner cavity; the second inner cavity is closer to the oil storage cylinder 3 than the first inner cavity; the piston rod 2 and the oil reservoir 3 form an oil reservoir in combination. The piston rod 2 is a circular rod.
The first inner cavity is filled with inert gas; in this embodiment, the inert gas is nitrogen; the first two-position three-way reversing valve 4 is respectively communicated with the second inner cavity, the oil tank 11 and the oil storage chamber; the second two-position three-way reversing valve 6 is respectively communicated with the inlet end of the hydraulic motor 8, the oil storage chamber and the outlet end of the hydraulic pump 9; an electric motor 10 is drivingly connected to the hydraulic pump 9; the inlet end of the hydraulic pump 9 and the outlet end of the hydraulic motor 8 are both communicated with an oil tank 11; the hydraulic motor 8 is drivingly connected to the generator 7.
The working principle of the system is as follows: in the initial state, the pressure of inert gas in the first inner cavity is lower; when energy storage is needed, the redundant electric energy of the power grid drives the motor 10 to rotate, the motor 10 drives the hydraulic pump 9 to pump oil in the oil tank 11 to enter the oil storage chamber through the pipeline and the second two-position three-way reversing valve 6 so as to push the piston rod 2 to move upwards, and inert gas in the first inner cavity is compressed to realize energy storage; meanwhile, oil enters the second inner cavity through the first two-position three-way reversing valve 4 to push the piston and the piston rod 2 to move upwards so as to compress inert gas in the first inner cavity to realize energy storage; the piston can be pushed to move upwards through 2 channels to compress inert gas, so that the energy storage efficiency is improved.
When energy needs to be released, the motor 10 stops working first; in the initial stage of energy release, the pressure of inert gas is higher, at the moment, the second two-position three-way reversing valve 6 reverses, the first two-position three-way reversing valve 4 does not operate, and in this state, the second inner cavity and the oil storage chamber are both communicated with the oil tank 11 (specifically, the second inner cavity is communicated with an oil drain pipeline of the oil storage chamber); the piston and the piston rod 2 are subjected to the pressure of compressed inert gas on the upper surface of the piston rod and move downwards so as to discharge oil in the second inner cavity, and then the oil is driven to flow through the second two-position three-way reversing valve 6 and then drive the hydraulic motor 8, and the hydraulic motor 8 drives the generator 7 to generate electricity so as to feed back to a power grid; meanwhile, the oil in the oil storage chamber is extruded by the piston rod 2 and passes through the pipeline and then the second two-position three-way reversing valve 6, then the hydraulic motor 8 is driven by the second two-position three-way reversing valve 6, and the hydraulic motor 8 drives the generator 7 to generate electricity so as to feed back to the power grid.
At a later stage of energy release, i.e., when the gas pressure of the inert gas in the first lumen decreases to a set value; the first two-position three-way reversing valve 4 reverses, and at the moment, the second inner cavity is communicated with the oil tank 11, namely, the second inner cavity is communicated with the outside at the moment and is in a pressure relief state; the pressure of the inert gas directly acts on the piston rod 2, and is only used for pushing the piston rod 2 to move downwards (namely, is only used for extruding oil in the oil storage chamber to be discharged, so as to drive the hydraulic motor 8 to realize power generation), which is equivalent to the improvement of the pressure of the inert gas borne by the piston rod 2, and further the improvement of the output pressure of the inert gas; after the oil discharge is completed, the first two-position three-way reversing valve 4 and the second two-position three-way reversing valve 6 are reversed again, namely the initial state is restored, so that the preparation is made for the next energy storage-energy release process.
In the piston cylinder energy storage system with the piston rod for discharging oil and pressurizing the piston, in the process of releasing energy, firstly, oil in a second inner cavity flows through a second two-position three-way reversing valve 6 and is output to a hydraulic motor 8 by arranging the first two-position three-way reversing valve 4, and the hydraulic motor 8 drives a generator 7 to work so as to generate electricity to feed back to a power grid; when the pressure of the inert gas in the first inner cavity is released for a certain period of time, the first two-position three-way reversing valve 4 is reversed at the moment, so that the second inner cavity is in a pressure release state, the pressure of the inert gas is directly acted on the piston rod 2 and only used for pushing the piston rod 2 to move downwards, namely the piston rod 2 extrudes the oil in the oil storage chamber to be discharged, the hydraulic motor 8 is driven to generate electricity after flowing through the second two-position three-way reversing valve 6 so as to feed back the electricity grid, the pressure of the inert gas borne by the piston rod 2 is correspondingly improved, and the output pressure of the inert gas is further improved, so that the energy release efficiency in the hydraulic energy storage technology is improved.
In addition, the piston cylinder energy storage system with the piston rod for discharging oil and pressurizing the piston also comprises an overflow valve 5; the first two-position three-way reversing valve 4, the second two-position three-way reversing valve 6 and the oil storage chamber are all communicated with the overflow valve 5.
Meanwhile, the motor 10 is a motor for both electric power generation; the generator 7 is also a motor for both electric and power generation. The hydraulic pump 9 is a variable hydraulic pump motor dual-purpose oil pump; the hydraulic motor 8 is a variable hydraulic pump motor dual-purpose oil pump.
Specifically, the system is arranged in a tower barrel of the wind generating set. When this system sets up in wind generating set's a tower section of thick bamboo, this system is used for: when the generated energy of the wind generating set is surplus, the wind generating set drives the motor 10 to realize energy storage; when the generated energy of the wind generating set is insufficient, electric energy is output to feed back to the power grid (the specific working principle is please refer to the above).
In addition, the oil storage cylinder 3 is provided with an oil inlet and an oil outlet communicated with the oil storage chamber; the first two-position three-way reversing valve 4 and the second two-position three-way reversing valve 6 are both communicated with the oil inlet and the oil outlet. Specifically, the oil pipe is communicated with the oil inlet and outlet, and the first two-position three-way reversing valve 4 and the second two-position three-way reversing valve 6 are both communicated with the oil pipe.
Meanwhile, the second two-position three-way reversing valve 6 is provided with a stop valve. The lower end of the oil storage cylinder 3 is also provided with a variable cross-section booster. The lower end of the oil storage cylinder 3 is also provided with a partial pressure section pressurizing control valve.
Through the technical scheme, the structure and the function of the piston cylinder energy storage system with the piston rod for discharging oil and pressurizing the piston are further improved.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. The piston cylinder energy storage system is characterized by comprising a cylinder storage barrel, a piston rod, an oil storage barrel, a first two-position three-way reversing valve, a second two-position three-way reversing valve, a generator, a hydraulic motor, a hydraulic pump, a motor and an oil tank; the piston is arranged in the inner cavity of the air cylinder in a sliding fit manner; one end of the piston rod is connected with the piston; the piston rod is arranged in the air storage cylinder in a sliding penetrating way and is in dynamic seal with the air storage cylinder; the other end of the piston rod is arranged in the oil storage cylinder in a sliding penetrating way and is in dynamic seal with the oil storage cylinder; the piston divides the internal space of the cylinder barrel into a first inner cavity and a second inner cavity; the second inner cavity is closer to the oil storage cylinder than the first inner cavity; the piston rod and the oil storage cylinder are combined to form an oil storage chamber; the piston rod is a circular rod;
the first inner cavity is filled with inert gas; the first two-position three-way reversing valve is respectively communicated with the second inner cavity, the oil tank and the oil storage chamber; the second two-position three-way reversing valve is respectively communicated with the inlet end of the hydraulic motor, the oil storage chamber and the outlet end of the hydraulic pump; the motor is in driving connection with the hydraulic pump; the inlet end of the hydraulic pump and the outlet end of the hydraulic motor are both communicated with the oil tank; the hydraulic motor is drivingly connected to the generator.
2. The piston ram energy storage system of claim 1, further comprising an overflow valve; the first two-position three-way reversing valve, the second two-position three-way reversing valve and the oil storage chamber are all communicated with the overflow valve.
3. The piston ram energy storage system with the piston rod discharging and piston pressurizing according to claim 1, wherein the motor is a dual-purpose motor for electric power generation; the generator is a motor for electric power generation.
4. The piston ram energy storage system with piston rod oil discharging and piston pressurizing of claim 1, wherein the hydraulic pump is a variable hydraulic pump motor dual-purpose oil pump; the hydraulic motor is a variable hydraulic pump motor dual-purpose oil pump.
5. The piston ram energy storage system of claim 1, wherein the system is disposed within a tower of a wind turbine generator system.
6. The piston ram energy storage system of claim 5, wherein said system is configured to: when the generated energy of the wind generating set is surplus, the wind generating set drives the motor to store energy; when the generated energy of the wind generating set is insufficient, electric energy is output to feed back to the power grid.
7. The piston ram energy storage system of claim 1, wherein the reservoir is provided with an oil inlet and outlet port through the reservoir chamber; the first two-position three-way reversing valve and the second two-position three-way reversing valve are both communicated with the oil inlet and the oil outlet.
8. The piston ram energy storage system of claim 1, wherein the second two-position three-way reversing valve is provided with a stop valve.
9. The piston ram energy storage system of claim 1, wherein the lower end of the reservoir is further provided with a variable cross-section booster.
10. The piston ram energy storage system of claim 1, wherein the lower end of the reservoir is further provided with a partial pressure section boost control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321160470.5U CN219974972U (en) | 2023-05-15 | 2023-05-15 | Piston cylinder energy storage system with piston rod for discharging oil and pressurizing piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321160470.5U CN219974972U (en) | 2023-05-15 | 2023-05-15 | Piston cylinder energy storage system with piston rod for discharging oil and pressurizing piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219974972U true CN219974972U (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321160470.5U Active CN219974972U (en) | 2023-05-15 | 2023-05-15 | Piston cylinder energy storage system with piston rod for discharging oil and pressurizing piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219974972U (en) |
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2023
- 2023-05-15 CN CN202321160470.5U patent/CN219974972U/en active Active
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