Air bag type energy accumulator and agricultural hydraulic press

Abstract

The utility model provides an air bag type energy accumulator and an agricultural hydraulic press. The air bag type energy storage device comprises a shell and an air bag. The air bag is located in the shell, a liquid storage cavity is formed between the air bag and the shell, an air storage cavity is formed in the air bag and filled with inert gas, and the liquid storage cavity is configured to compress the air bag when hydraulic oil is introduced. Elastic fins are fixed to the inner wall of the air bag, elastic containing cavities are formed in the elastic fins, the elastic containing cavities are filled with phase change materials, and the phase change materials are configured to absorb heat when the air bag is compressed and release heat when the air bag is expanded. According to the air bag type energy accumulator, the temperature change of the air bag can be reduced, and the service life of the air bag is prolonged.

Description

Technical Field

[0001] This application relates to the field of hydraulic equipment, and more specifically, to a pneumatic energy storage device and an agricultural hydraulic device. Background Technology

[0002] In hydraulic systems, hydraulic accumulators are common energy storage and regulation devices, primarily used to store excess energy, stabilize pressure, and reduce shocks and pulsations. Pneumatic accumulators, as a common type, are widely used in hydraulic systems due to their unique advantages. They typically consist of a steel outer shell and an internal rubber bladder containing inert gas for storing and releasing gas pressure. When the hydraulic system pressure increases, hydraulic oil enters the accumulator, compressing the bladder and storing energy; when the system pressure decreases, the gas inside the bladder expands, pushing the hydraulic oil back into the system and releasing the energy. This working principle is simple and effective, mitigating pressure fluctuations and shocks in hydraulic systems to some extent. Utility Model Content

[0003] This application provides an airbag-type energy storage device and an agricultural hydraulic device, which can reduce the temperature change of the airbag and extend the service life of the airbag.

[0004] Specifically, this application is implemented through the following technical solution:

[0005] One aspect of this application provides a pneumatic energy storage device for communication with a hydraulic system, the pneumatic energy storage device comprising:

[0006] case;

[0007] An airbag is located inside the housing, and a liquid reservoir is formed between the airbag and the housing. The interior of the airbag is a gas reservoir filled with inert gas. The liquid reservoir is configured to compress the airbag when hydraulic oil is introduced.

[0008] The inner wall of the airbag is fixed with elastic fins, and the elastic fins have elastic cavities. The elastic cavities are filled with phase change material, which is configured to absorb heat when the airbag is compressed and release heat when the airbag is expanded.

[0009] Optionally, one end of the elastic fin is slotted, and the slot and the inner wall of the airbag form the elastic receiving cavity.

[0010] Optionally, the elastic fins include a plurality of fins, which are evenly distributed on the inner wall of the airbag.

[0011] Optionally, the end face of the elastic fin that is fixed to the inner wall of the airbag is a circular face.

[0012] Optionally, the airbag is equipped with a pressure sensor inside to detect the air pressure inside the airbag, and the airbag is also connected to an inflation / deflation valve, which is configured to replenish or release gas into the air storage chamber according to the air pressure value detected by the pressure sensor.

[0013] Another aspect of this application provides an agricultural hydraulic device, including the air-bag type energy storage device described in any of the above claims;

[0014] The hydraulic cylinder is connected to the air-filled accumulator via a connecting pipe, and a throttle valve and a hydraulic pressure gauge are connected in series on the connecting pipe.

[0015] Optionally, the hydraulic cylinder includes a cylinder body and a piston rod, the piston rod extending into the interior of the cylinder body and movable relative to the cylinder body;

[0016] A dust cover is provided between the end of the piston rod extending out of the cylinder body and the end of the cylinder body near the piston rod, and the dust cover is telescopic and deformable.

[0017] Optionally, one end of the dust cover is sealed and fixed to the end of the piston rod extending out of the cylinder, and the other end is sealed and fixed to the end of the cylinder near the piston rod.

[0018] This application provides a bladder-type energy storage device and an agricultural hydraulic device. The bladder-type energy storage device includes a shell, an air bladder, and elastic fins. Elastic fins are fixed to the inner wall of the air bladder, and elastic receiving cavities are formed within the elastic fins, filled with a phase change material. When the air bladder is compressed, the phase change material undergoes a phase change, for example, from solid to liquid. During this phase change, it absorbs the heat released by the compression of nitrogen gas, thereby reducing the temperature rise of the air bladder. When the air bladder expands, the phase change material undergoes another phase change, for example, from liquid to solid. This phase change releases heat, which can offset the heat absorbed by the expansion of nitrogen gas, thereby reducing the temperature drop of the air bladder. The phase change material effectively suppresses temperature fluctuations during compression and expansion, avoiding excessive wear caused by large temperature changes, thus reducing temperature variations in the air bladder to a certain extent, extending its service life, and ensuring its performance stability and reliability. Attached Figure Description

[0019] Figure 1 This is a front view of an agricultural hydraulic device shown in an exemplary embodiment of this application;

[0020] Figure 2 This is a side view of an agricultural hydraulic device shown in an exemplary embodiment of this application;

[0021] Figure 3 This is a top view of an exemplary embodiment of the present application illustrating an agricultural hydraulic device;

[0022] Figure 4 This is a schematic diagram of the interior of an airbag-type energy storage device shown in an exemplary embodiment of this application;

[0023] Figure 5 This is an internal side view of an airbag-type energy storage device illustrated in an exemplary embodiment of this application;

[0024] Figure 6 This is a partial schematic diagram of an exemplary embodiment of the present application illustrating a bladder-type energy storage device;

[0025] Figure 7 This is a schematic diagram of the inflation of a bladder-type energy storage device shown in an exemplary embodiment of this application.

[0026] The components include: shell 100, air bladder 200, liquid storage chamber 310, air storage chamber 320, elastic fins 400, elastic receiving chamber 410, phase change material 500, inflation / deflation valve 600, hydraulic cylinder 700, hydraulic pressure gauge 710, cylinder body 701, piston rod 702, and dust cover 703. Detailed Implementation

[0027] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0028] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0029] refer to Figure 1 , Figure 4 and Figure 5This application provides a bladder-type energy accumulator for connection to a hydraulic system, used to store excess energy, stabilize pressure, and reduce shocks and pulsations. The bladder-type energy accumulator includes a housing 100, a bladder 200, and elastic fins 400. The bladder 200 is located inside the housing 100, forming a liquid storage chamber 310 between the bladder 200 and the housing 100. The interior of the bladder 200 is a gas storage chamber 320. The gas storage chamber 320 is filled with an inert gas, such as nitrogen or argon; nitrogen will be used as an example below. The liquid storage chamber 310 is configured to compress the bladder 200 when hydraulic oil is introduced. That is, when the bladder-type energy accumulator stores energy, the bladder 200 is compressed, and the nitrogen pressure inside the gas storage chamber 320 increases. When the bladder-type energy accumulator needs to release stored energy, the hydraulic oil supply line to the hydraulic system is opened. The nitrogen pressure acts as a driving force, causing the bladder 200 to inflate, forcing the hydraulic oil in the liquid storage chamber 310 into the hydraulic system.

[0030] Combination Figure 6 and Figure 7 The inner wall of the airbag 200 is fixed with elastic fins 400, and an elastic receiving cavity 410 is formed within the elastic fins 400. The elastic receiving cavity 410 is filled with phase change material 500. The phase change material 500 is configured to absorb heat when the airbag 200 is compressed and release heat when the airbag 200 expands. When the airbag 200 is compressed, the volume of nitrogen decreases, the pressure increases, and the temperature rises. When the airbag 200 expands, the nitrogen in the gas storage cavity 320 expands and does work due to the increase in the volume of the airbag 200, resulting in a decrease in its own pressure, an increase in its volume, and a corresponding decrease in its temperature. This leads to a large temperature fluctuation in the airbag 200, accelerating the aging of the airbag 200.

[0031] In this application, elastic fins 400 are fixed to the inner wall of the airbag 200, and a phase change material is filled in the elastic receiving cavity 410. When the airbag 200 is compressed, the phase change material 500 undergoes a phase change, for example, from solid to liquid. During the phase change process, it can absorb the heat released by the compression of nitrogen gas, thereby reducing the temperature rise of the airbag 200. When the airbag 200 expands, the phase change material 500 undergoes a phase change, for example, from liquid to solid. The phase change process releases heat, which can offset the heat absorbed by the expansion of nitrogen gas, thereby reducing the temperature drop of the airbag 200. The phase change material can effectively suppress the temperature fluctuation of the airbag 200 during compression and expansion, avoiding excessive wear caused by large temperature changes, thereby reducing the temperature change of the airbag 200 to a certain extent, extending the service life of the airbag 200, and ensuring its performance stability and reliability.

[0032] In one embodiment, one end of the elastic fin 400 is slotted, and the slot and the inner wall of the airbag 200 form an elastic receiving cavity 410. This means that the phase change material filling the elastic receiving cavity 410 directly contacts the inner wall of the airbag 200, allowing for direct heat exchange with the airbag 200, thus making the effect of the phase change material in reducing the temperature change of the airbag 200 more direct. The elastic receiving cavity 410 changes shape with the expansion and compression of the airbag 200, and the shape of the phase change material within the receiving space also changes synchronously.

[0033] In one embodiment, multiple elastic fins 400 are uniformly distributed inside the airbag 200. The uniformly distributed elastic fins 400 and the airbag 200 can be integrally formed, and the elastic fins 400 and the airbag 200 can be made of the same material, such as rubber. This allows the elastic fins 400 to change shape with the airbag 200 during expansion or compression. The multiple uniform elastic fins 400 can serve as a support network inside the airbag 200, dispersing stress concentration during expansion or compression.

[0034] In one embodiment, the end face where the elastic fin 400 is fixed to the inner wall of the air bladder 200 is circular. During the expansion and compression of the air bladder 200, the circular design of the end face where the elastic fin 400 is fixed to the inner wall of the air bladder 200 allows for more uniform stress distribution on the fixed portion of the elastic fin 400. The circular surface has the same curvature in all directions, ensuring uniform distribution of tensile force in the fixed area of ​​the elastic fin 400 and the air bladder 200, preventing localized stress concentration, reducing the risk of fatigue failure at the root of the elastic fin 400, and thus improving the service life and reliability of the elastic fin 400.

[0035] In one embodiment, reference Figure 1 , Figure 3 and Figure 4 The airbag 200 is equipped with a pressure sensor (not shown in the figure) to detect the internal pressure. The airbag 200 is also connected to an inflation / deflation valve 600, which is configured to add or release gas to the air reservoir 320 based on the pressure value detected by the pressure sensor. Due to changes in external temperature or pressure loss during use, the pressure inside the airbag 200 may exceed or fall below the working pressure. In this case, the airbag 200 can be inflated or deflated by opening or closing the inflation / deflation valve 600 based on the detected pressure value, thereby ensuring that the pressure inside the airbag 200 remains at the working pressure.

[0036] This application also provides an agricultural hydraulic system, combined with Figure 1 , Figure 2 and Figure 3The agricultural hydraulic system includes the air-bladder accumulator and hydraulic cylinder 700 as described in any of the above embodiments. The hydraulic cylinder 700 is connected to the air-bladder accumulator via a connecting pipe, and a throttle valve (not shown in the figure) and a hydraulic pressure gauge 710 are connected in series in the connecting pipe.

[0037] By integrating the hydraulic cylinder 700 and the pneumatic accumulator, efficient energy storage and rapid release are achieved. The pneumatic accumulator stores hydraulic energy and releases it quickly and promptly to the hydraulic cylinder 700 when needed. A throttle valve precisely controls the flow of hydraulic oil. A hydraulic pressure gauge 710 monitors the pipeline pressure in real time, providing operators with intuitive pressure feedback for timely adjustments to the system's operating status. This ensures that during the process of the pneumatic accumulator releasing hydraulic energy to the hydraulic cylinder 700, or storing hydraulic energy from the hydraulic cylinder 700, the agricultural hydraulic system operates efficiently within a safe and stable pressure range, meeting the reliability, energy efficiency, and precision requirements of agricultural equipment for hydraulic systems.

[0038] In one embodiment, please refer to Figure 1 The hydraulic cylinder 700 includes a cylinder body 701 and a piston rod 702. The piston rod 702 extends into the interior of the cylinder body 701 and can move relative to the cylinder body 701. The piston rod 702 is pushed relative to the cylinder body 701 by hydraulic oil.

[0039] A dust cover 703 is provided between the end of the piston rod 702 extending out of the cylinder body 701 and the end of the cylinder body 701 near the piston rod 702. The dust cover 703 is telescopic and deformable. That is, the dust cover 703 fits around the circumference of the part of the piston rod 702 extending out of the cylinder body 701. And it can extend or compress as the side length of the extended part of the piston rod 702 decreases. Since the working environment of agricultural hydraulic systems may have a lot of dust or impurities, the dust cover 703 of this application can effectively reduce the entry of dust and impurities into the hydraulic cylinder, thereby reducing the wear of impurities on the piston rod 702 and the cylinder body 701, extending the service life of the hydraulic cylinder 700, and ensuring the stable operation of agricultural hydraulic devices in harsh environments.

[0040] In one embodiment, one end of the dust cover 703 is sealed and fixed to the end of the piston rod 702 that extends out of the cylinder body 701, and the other end is sealed and fixed to the end of the cylinder body 701 near the piston rod 702. This effectively prevents dust and impurities from entering the interior of the dust cover 703 from the gaps at both ends, further enhancing the dustproof effect.

[0041] In another embodiment, the cylinder body 701 is connected to bushings at both ends, and the bushings are typically made of wear-resistant materials such as bearing steel.

[0042] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An air bag energy accumulator, characterized by For communication with a hydraulic system, the pneumatic energy storage device includes: case; An airbag is located inside the housing, and a liquid reservoir is formed between the airbag and the housing. The interior of the airbag is a gas reservoir filled with inert gas. The liquid reservoir is configured to compress the airbag when hydraulic oil is introduced. The inner wall of the airbag is fixed with elastic fins, and the elastic fins have elastic cavities. The elastic cavities are filled with phase change material, which is configured to absorb heat when the airbag is compressed and release heat when the airbag is expanded.

2. The gas bag energy accumulator of claim 1, wherein, One end of the elastic fin is slotted, and the slot and the inner wall of the airbag form the elastic receiving cavity.

3. The gas bag energy accumulator of claim 2, wherein, The elastic fins comprise multiple fins, which are evenly distributed on the inner wall of the airbag.

4. The gas bag energy accumulator of claim 3, wherein, The end face of the elastic fin that is fixed to the inner wall of the airbag is a circular surface.

5. The gas bag energy accumulator according to any one of claims 1 to 4, characterized in that The airbag is equipped with a pressure sensor inside to detect the air pressure inside the airbag. The airbag is also connected to an inflation / deflation valve, which is configured to add or release gas to the air storage chamber according to the air pressure value detected by the pressure sensor.

6. An agricultural hydraulic implement characterized by Includes the airbag-type energy storage device as described in any one of claims 1 to 5; The hydraulic cylinder is connected to the air-filled accumulator via a connecting pipe, and a throttle valve and a hydraulic pressure gauge are connected in series on the connecting pipe.

7. The agricultural hydraulic implement of claim 6, wherein, The hydraulic cylinder includes a cylinder body and a piston rod, the piston rod extending into the interior of the cylinder body and movable relative to the cylinder body; A dust cover is provided between the end of the piston rod extending out of the cylinder body and the end of the cylinder body near the piston rod, and the dust cover is telescopic and deformable.

8. The agricultural hydraulic implement of claim 7, wherein, One end of the dust cover is sealed and fixed to the end of the piston rod that extends out of the cylinder body, and the other end is sealed and fixed to the end of the cylinder body near the piston rod.

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