Wide-voltage broadband pulse elimination energy accumulator

Abstract

The invention relates to the technical field of hydraulic systems, in particular to a wide-pressure broadband pulse-eliminating energy accumulator which is characterized in that the first end of a shell is in sealed connection with an outer end cover, and the second end of the shell is provided with a liquid inlet used for being connected with a hydraulic pipeline; the inner shell is arranged in the outer shell; the connecting piece is used for connecting the inner shell and the outer shell and dividing an inner cavity of the outer shell into a first air chamber and a first liquid chamber; the first liquid chamber is located on the side, close to the liquid inlet, of the inner shell. The connecting piece can adjust the position or the shape of the connecting piece when the pressure difference exists between the first air chamber and the first liquid chamber; a first through hole communicated with the first liquid chamber is formed in the first end of the inner shell, and a second through hole communicated with the first air chamber is formed in the second end of the inner shell; the leather bag is arranged in the inner shell, and an opening of the leather bag is communicated with the second through hole; the leather bag divides the space in the inner shell into a second air chamber and a second liquid chamber; the second air chamber is communicated with the first air chamber, and the second liquid chamber is communicated with the second air chamber. The invention can adapt to a hydraulic system with a large pressure change range and a wide pulsation frequency band.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hydraulic systems, and in particular to a wide-voltage and wide-frequency pulse-eliminating accumulator. Background Art

[0002] In the fluid pipeline system, due to the discontinuity of the pumping flow, there is flow pulsation in the pipeline, which is converted into pressure pulsation under the action of system impedance, causing pipeline vibration problems. Therefore, reducing pulsation is beneficial to extending the system life and enhancing reliability.

[0003] Accumulators are often used in pipeline systems to store energy, supplement flow, eliminate fluid pulsation, etc. Its main structure includes a variable-volume air chamber and a liquid chamber. The working principle is that when the pressure in the liquid chamber increases, the air chamber is compressed due to the compressibility of the gas, thereby storing the flow and hydraulic energy of the first liquid chamber. When the pressure in the liquid chamber decreases, the air chamber expands and squeezes the liquid back into the system, thereby supplementing the flow and releasing energy.

[0004] Although existing accumulators can adapt to pipeline systems with a wide range of pressure changes, their attenuation frequency range is narrow and concentrated in the low-frequency band, and they have almost no effect on high-frequency fluid pulsations. Summary of the invention

[0005] The present disclosure is proposed in view of the above problems. The present disclosure provides a wide-voltage and wide-frequency pulse elimination accumulator.

[0006] According to one aspect of the present disclosure, a wide-voltage and wide-frequency pulse elimination accumulator is provided, which includes:

[0007] An outer shell having a first end sealed with an outer end cover and a second end provided with a fluid inlet for connection with a hydraulic pipeline;

[0008] An inner shell, disposed inside the outer shell;

[0009] A connecting piece, wherein the connecting piece connects the inner shell and the outer shell, and divides the inner cavity of the outer shell into a first air chamber and a first liquid chamber; the first liquid chamber is located on a side of the inner shell close to the liquid inlet; the connecting piece can adjust its position or shape to balance the pressure of the first air chamber and the first liquid chamber when there is a pressure difference between the first air chamber and the first liquid chamber;

[0010] The inner shell is cylindrical, and a first through hole communicating with the first liquid chamber is provided at a first end thereof, and a second through hole communicating with the first air chamber is provided at a second end thereof;

[0011] A bladder is arranged in the inner shell, and the opening of the bladder is connected to the second through hole; the bladder divides the space in the inner shell into a second air chamber and a second liquid chamber; the second air chamber is connected to the first air chamber, and the second liquid chamber is connected to the second air chamber.

[0012] As described above, the wide-voltage and wide-frequency pulse elimination accumulator, wherein, optionally, the connecting member is a bellows, the first end of the bellows is sealedly connected to the first end of the outer shell, and the bellows extends inside the outer shell;

[0013] The second end of the bellows is sealed and connected to the first end of the inner shell.

[0014] The wide-voltage and wide-band pulse-eliminating accumulator as described above, wherein, optionally, an inner liner is fixedly provided on the outer end cover, and the inner liner is located in the first air chamber;

[0015] An opening is provided at one end of the inner liner away from the outer end cover;

[0016] The second end of the inner shell can extend into the inner liner through the opening;

[0017] A first gap is preset between the outer periphery of the inner shell and the inner liner.

[0018] As the wide-voltage and wide-band pulse-eliminating accumulator as described above, optionally, the outer shell, the outer end cover, the bellows and the inner shell are coaxially arranged.

[0019] As described above, the wide-voltage and wide-frequency pulse elimination accumulator, wherein, optionally, the connecting member is a piston, and the piston is slidingly and sealingly installed in the outer shell;

[0020] The piston is provided with a mounting hole, and the mounting hole passes through the piston;

[0021] The inner shell is installed in the installation hole; the first through hole faces the first liquid chamber; and the second through hole faces the first air chamber.

[0022] As described above, in the wide-voltage and wide-frequency pulse-eliminating accumulator, optionally, a plurality of annular sealing grooves are provided on the outer circumference of the piston, and sealing rings are provided in the sealing grooves.

[0023] As described above, the wide-voltage and wide-band pulse-eliminating accumulator, wherein, optionally, the outer end cover protrudes in a direction away from the liquid inlet to form a receiving space capable of accommodating the second end of the inner shell; a second gap is formed between the outer periphery of the inner shell and the inner wall of the outer end cover.

[0024] As the wide-voltage and wide-frequency pulse-eliminating accumulator as described above, optionally, the outer shell, the outer end cover, the inner shell and the piston are coaxially arranged.

[0025] As described above, optionally, the liquid inlet is used to be connected to the main pipeline of the hydraulic system.

[0026] As will be described in detail below, according to the wide-voltage and wide-band pulse-eliminating accumulator of the embodiment of the present disclosure, a connector is provided in the outer shell, and the connector can separate the inner cavity of the outer shell into a first air chamber and a first liquid chamber. Since the position or shape of the connector itself can change according to the pressure difference between the first air chamber and the first liquid chamber to balance the pressure between the first air chamber and the first liquid chamber, the change in the position or shape of the connector can respond to the fluid pulsation in the low frequency band. By providing a bladder in the inner shell, the characteristic of the bladder that can quickly respond to the fluid pulsation can be used to ensure that the bladder absorbs high-frequency pulsation. Therefore, through the joint action of the bladder and the connector, the accumulator can adapt to a larger range of pressure differences and pulsations in a wider frequency band.

[0027] By providing a connector with a variable shape or position, the pressure balance point is determined by the change of the shape or position of the connector. When the first air chamber is filled with gas and connected to the hydraulic system, the pressure of the hydraulic system can be automatically adapted by the change of the shape or position of the connector. The change of the shape and position of the connector increases the pressure of the hydraulic system that can be adapted. Therefore, the present invention can adapt to a hydraulic system with a wide pressure change range and a wide pulsation frequency.

[0028] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other purposes, features and advantages of the present disclosure will become more apparent by describing the embodiments of the present disclosure in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0030] Figure 1 It is a structural schematic diagram of the first wide-voltage and wide-frequency pulse elimination accumulator proposed in the present disclosure;

[0031] Figure 2 It is a schematic structural diagram of the second wide-voltage and wide-frequency pulse-eliminating accumulator proposed in the present disclosure.

[0032] Description of reference numerals:

[0033] 1-outer shell, 2-inner shell, 3-connecting piece, 4-skin bag, 5-first gap, 6-second gap;

[0034] 11-external end cover, 12-liquid inlet, 13-first air chamber, 14-first liquid chamber, 15-inner lining, 16-opening, 17-accommodating space;

[0035] 21-first through hole, 22-second through hole;

[0036] 31- bellows, 32- piston;

[0037] 321-mounting hole, 322-sealing groove, 323-sealing ring;

[0038] 41 - second air chamber, 42 - second liquid chamber. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present disclosure more obvious, the exemplary embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure, and it should be understood that the present disclosure is not limited to the exemplary embodiments described here.

[0040] In view of the problems raised in the background technology, the present invention proposes the following solutions to solve them.

[0041] Please refer to Figure 1 In one implementation, a first wide-voltage and wide-frequency pulse-eliminating accumulator is proposed, which includes an outer shell 1, an inner shell 2, a connecting piece 3 and a bladder 4. The outer shell 1 is used to support the entire structure and connect to the hydraulic system, the inner shell 2 is used to fix the bladder 4, the connecting piece 3 is used to achieve adaptive adjustment of the pressure on both sides and respond to low-frequency pulsation, and the bladder 4 is used to respond to high-frequency pulsation.

[0042] Please refer to Figure 1 and Figure 2 , the first end of the outer shell 1 is sealed with an outer end cap 11, and the second end is provided with a liquid inlet 12 for connecting to a hydraulic pipeline; in a specific implementation, the outer shell 1 and the first end can be sealed and connected by threads, or sealed and connected in other ways. In a specific implementation, in order to facilitate the inflation of the outer shell 1, an inflation port can be provided on the outer end cap 11, so as to facilitate the inflation of gas of corresponding pressure as needed. Of course, in some implementations, the inflation port can also be blocked after the gas of predetermined pressure is injected.

[0043] The inner housing 2 is arranged in the outer housing 1 ; in a specific implementation, in order to ensure the pressure of the accumulator adaptive hydraulic system, the inner housing 2 is slidably arranged in the outer housing 1 .

[0044] The connector 3 connects the inner shell 2 and the outer shell 1, and divides the inner cavity of the outer shell 1 into a first air chamber 13 and a first liquid chamber 14; the first liquid chamber 14 is located on the side of the inner shell 2 close to the liquid inlet 12; the connector 3 can adjust its own position or shape when there is a pressure difference between the first air chamber 13 and the first liquid chamber 14 to balance the pressure of the first air chamber 13 and the first liquid chamber 14; in specific implementation, the inner shell 2 can reciprocate between the first air chamber 13 and the first liquid chamber 14 in the outer shell 1 to eliminate the pulsation of the hydraulic system. Since the connector 3 is provided, the connector 3 acts as a carrier for the reciprocating movement of the inner shell 2, and the inner shell 2 can be moved by the deformation or movement of the connector 3, and finally the inner shell 2 reciprocates near the balance point. Hydraulic systems of different pressures correspond to different balance points. Through the movable setting of the inner shell 2, the present disclosure can adapt to hydraulic systems of different pressures.

[0045] Specifically, the inner shell 2 is cylindrical, and a first through hole 21 communicating with the first liquid chamber 14 is provided at a first end thereof, and a second through hole 22 communicating with the first air chamber 13 is provided at a second end thereof; further, the inner shell 2 is cylindrical, and inner end covers are sealed and connected at both ends, and the first through hole 21 and the second through hole 22 are arranged on the inner end covers.

[0046] The bladder 4 is arranged in the inner shell 2, and the opening 16 of the bladder 4 is connected to the second through hole 22; the bladder 4 divides the space in the inner shell 2 into a second air chamber 41 and a second liquid chamber 42; the second air chamber 41 is connected to the first air chamber 13, and the second liquid chamber 42 is connected to the second air chamber 41. In the specific implementation, the bladder 4 can be cylindrical or in other shapes, as long as it can be sealed and connected to the inner shell 2 and divide the inner shell 2 into the second air chamber 41 and the second liquid chamber 42. However, considering that the bladder 4 needs to respond quickly to high-frequency pulsations. In a preferred embodiment, the bladder 4 can be arranged in a pocket shape, specifically, it can be a cylindrical shape with one end open in a natural state. In this way, the contact surface between the bladder 4 and the second liquid chamber or the second air chamber can be increased, so that the bladder 4 can respond quickly to the high-frequency pulsations of the hydraulic system.

[0047] By setting the connecting piece 3, the position of the connecting piece 3 can be automatically adjusted according to the pressure difference between the first air chamber and the first liquid chamber. Compared with using only the bladder 4, it is helpful to adjust the bladder 4 to a balanced position as much as possible, reduce the long-term tension state of the bladder 4 due to the change of system pressure, and help to ensure the service life of the bladder 4 and enable the bladder 4 to maintain a high sensitivity, especially under different pressures.

[0048] In a specific implementation, the connecting member 3 is a bellows 31, the first end of the bellows 31 is sealedly connected to the first end of the outer shell 1, and the bellows 31 extends inside the outer shell 1; the second end of the bellows 31 is sealedly connected to the first end of the inner shell 2. In a specific implementation, when the pressure in the first air chamber 13 is greater than the pressure in the first liquid chamber 14, the bellows 31 is stretched until the pressure in the first air chamber 13 is substantially equal to the pressure in the first liquid chamber 14; when the pressure in the first air chamber 13 is less than the pressure in the first liquid chamber 14, the bellows 31 is compressed until the pressure in the first air chamber 13 is substantially equal to the pressure in the first liquid chamber 14. In this way, adaptive adjustment can be performed according to the pressure of the hydraulic system, so that the present disclosure can adapt to hydraulic systems with different pressures.

[0049] In the specific implementation, in order to further expand the working pressure range of the present disclosure, in this embodiment, a liner 15 is fixedly provided on the outer end cover 11, and the liner 15 is located in the first air chamber 13; an opening 16 is provided at one end of the liner 15 away from the outer end cover 11; the second end of the inner shell 2 can extend into the liner 15 through the opening 16; a first gap 5 is preset between the outer periphery of the inner shell 2 and the liner 15. In the specific implementation, the liner 15 is designed to be concave, and when the bellows 31 is fully contracted, a part of the incompressible air chamber space is filled to increase the multiple of the volume change of the first air chamber, thereby expanding the working pressure range. In addition, the liner 15 is designed to be concave, and when the inner shell 2 extends into the liner 15, a gas spring is formed, which brings a certain buffering effect to the contraction movement of the bellows 31.

[0050] The bellows 31 moves under the joint action of the first air chamber 13 and the first liquid chamber 14 to adjust the pressure in the first air chamber 13, and achieves the following of the mean value of the pressure in the first liquid chamber, so as to ensure that the bladder 4 is always in a free movement state. When the bellows 31 is compressed, the first liquid chamber 14 in the outer shell 1 can form a Helmholtz resonant cavity. By selecting appropriate design parameters, the resonant frequency of the resonant cavity can be matched with the system pulsation frequency.

[0051] Through the above structure, in this implementation, the bellows 31 and the bladder 4 both allow the device to attenuate both high and low frequency pulsations. The bellows 31 compensates for the volume so that the device can maintain its working capacity under a wide range of pressure changes.

[0052] In some preferred implementations, the outer shell 1, the outer end cover 11, the bellows 31 and the inner shell 2 are coaxially arranged. Such an arrangement can ensure the stability of the accumulator during operation.

[0053] In order to maximize the attenuation effect during use, the liquid inlet 12 should be connected to the pulsation source, namely the pump port, and connected in parallel with the main pipeline.

[0054] Pre-inflation is performed before use. At this time, the bellows 31 is in a fully stretched state, and the system starts to increase the pressure. When the pressure in the first liquid chamber 14 is greater than the pressure in the first air chamber 13, the bellows 31 starts to contract due to the internal and external pressure difference, compressing the gas in the first air chamber 13 until the internal and external pressures are balanced, thereby ensuring that the bag 4 is in a free motion state, and high-frequency flow pulsations are absorbed by the contraction and expansion movement of the bag 4; when the pressure in the first liquid chamber 14 is less than the pressure in the first air chamber 13, the bellows 31 starts to expand due to the internal and external pressure difference until the internal and external pressures are balanced, thereby also ensuring that the bag 4 can absorb high-frequency flow pulsations.

[0055] The manifestation of flow pulsation and pressure pulsation in the time domain is often the superposition of several sinusoidal functions, fluctuating around the mean. The pressure of the first air chamber 13 is consistent with the mean pressure of the first liquid chamber 14 under the movement of the bellows 31. When the pulsating pressure is greater than the mean, the bladder 4 is compressed and absorbs part of the flow of the main line. When the pulsating pressure is less than the mean, the bladder 4 expands and supplements part of the flow of the main line, thereby achieving attenuation of the pulsation of the main line.

[0056] The flow pulsation in the pipeline usually has a wide distribution frequency domain and is located in the medium and high frequencies. In a high-pressure system, a flow pulsation with a smaller amplitude can cause a pressure pulsation with a larger amplitude. Therefore, a bladder 4 with a wide resonance frequency and a small compensation volume can be used to effectively absorb the flow pulsation.

[0057] When the bellows 31 is compressed to the limit, the system pressure continues to increase, causing the bladder 4 to be compressed, so that the device loses its pulsation attenuation effect. Therefore, when the bellows 31 is compressed to the limit, the pressure in the first air chamber 13 is the boundary of the working pressure range of the device. Increasing the pressure change range of the first air chamber 13 can increase the working range of the device.

[0058] Please refer to Figure 2 In another implementation, the present disclosure also proposes a second wide-voltage and wide-band pulse-eliminating accumulator, which includes, compared with the first wide-voltage and wide-band pulse-eliminating accumulator, the difference mainly lies in that the connecting member 3 is different, the lining on the outer end cover 11 is cancelled, and the structure of the outer end cover 11 is changed. In the following description, the similarities are not repeated, and only the differences are explained.

[0059] Please refer to Figure 2 The connecting member 3 is a piston 32, and the piston 32 is slidably and sealably mounted in the outer shell 1. That is, the piston 32 can slide along the axial direction of the outer shell 1. In this solution, the outer shell 1 can preferably be a cylindrical structure, and of course it can also be a columnar structure with other equal cross-sections.

[0060] The piston 32 is provided with a mounting hole 321, which penetrates the piston 32; the mounting hole 321 is used to mount the inner housing 2 so that the inner housing 2 can move with the piston 32, and the inner housing 2 is mounted in the mounting hole 321; the first through hole 21 faces the first liquid chamber 14; the second through hole 22 faces the first air chamber 13. By setting the piston 32 in this way, the inner housing 2 can move under the pressure difference between the first air chamber 13 and the first liquid chamber 14, and the piston 32 and the outer housing 1 are kept sealed during the movement. The position of the inner housing 2 can be adaptively adjusted by the piston 32 to adapt it to hydraulic systems with different pressures, so that it is suitable for hydraulic systems with a wider pressure range. At the same time, the piston 32 can eliminate low-frequency flow pulsation, while the bladder 4 can eliminate high-frequency flow pulsation.

[0061] In a specific implementation, in order to ensure the sealing between the piston and the outer shell 1, a plurality of annular sealing grooves 322 are provided on the outer circumference of the piston 32, and a sealing ring 323 is provided in the sealing groove 322. Specifically, in some implementations, three sealing grooves 322 are provided on the outer surface of the piston 32, and a sealing ring 323 is provided in the first sealing groove 322 to ensure a good sealing effect.

[0062] In some implementations, in order to expand the working pressure range of the present disclosure, the outer end cover 11 protrudes in a direction away from the liquid inlet 12 to form a storage space 17 capable of accommodating the second end of the inner shell 2; a second gap 6 is formed between the outer periphery of the inner shell 2 and the inner wall of the outer end cover 11. The outer end cover 11 is designed to be convex, and the storage space 17 can accommodate the inner shell 2, and the air cavity is filled on both sides to reduce the gas volume when the first air chamber 13 is fully compressed, thereby increasing the gas pressure and expanding the working pressure range of the device. The outer end cover 11 is designed to be convex, and when the inner shell 2 extends into the storage space, the internal gas is compressed to form a gas spring, which brings a certain buffering effect to the contraction movement of the piston 32.

[0063] In some implementations, in order to ensure the stability of the device during operation, the outer shell 1, the outer end cover 11, the inner shell 2 and the piston 32 are coaxially arranged.

[0064] In order to maximize the attenuation effect during specific implementation, the liquid inlet 12 should be connected to the pulsation source, namely the pump port, and connected in parallel with the main pipeline, that is, the liquid inlet 12 is used to be connected to the main pipeline of the hydraulic system.

[0065] For a Helmholtz cavity, the transmission loss is:

[0066]

[0067] TL is the difference between the incident sound energy and the transmitted sound energy. The larger it is, the more energy the device absorbs. A represents the area of ​​the liquid inlet. For the liquid inlet 12, its area has an impact on the absorption effect of flow pulsation. Specifically, the larger the area, the greater the liquid flow rate of the reciprocating motion in the neck, and the better the absorption effect of the device on flow pulsation. Therefore, in principle, the area of ​​the liquid inlet should be as large as possible.

[0068] The first through hole 21 connects the first liquid chamber and the second liquid chamber, and plays a role in passing the fluid when the bag repeatedly expands and contracts. Its structural parameters affect the pulsation absorption effect, which is manifested in that the larger the through hole area, the greater the liquid flow in and out, and the better the pulsation absorption effect of the bag. Therefore, the through hole area should be as large as possible while ensuring that the bag 4 is not squeezed out during expansion. In some implementations, the diameter of the first through hole 21 can be one-third to two-thirds of the inner diameter of the inner shell 2.

[0069] The gas in the accommodating space 17 is basically compressed when the connector 3 is compressed. The second air chamber 41 is designed to have some space left when the connector 3 is completely compressed. Therefore, the air pressure in the accommodating space 17 increases faster than that in the second air chamber 41 when the connector 3 is compressed. The air pressure is higher than the oil pressure in the liquid chamber, forming a gas spring to prevent the inner shell 2 from being compressed too quickly when approaching the liner 15 and causing collision and structural damage. There is a pressure difference between the accommodating space 17 and the second air chamber 41. The gas flows from the accommodating space 17 to the second air chamber 41. The flow rate determines the speed at which the air pressures in the two chambers reach equilibrium, and also affects the maximum movement speed of the connector 3. At the same time, the faster the connector 3 is compressed, the faster the air pressure in the accommodating space 17 increases, and the greater the stiffness of the gas spring, which can effectively limit the movement speed of the connector 3.

[0070] The lining 15 is made into a flared shape that is narrow at the top and wide at the bottom. The opening 16 will gradually narrow as the inner shell 2 moves upward. When the inner shell 2 is away from the lining 15, the first gap 5 is wider and the constraint on the movement speed is small. When the inner shell 2 is close to the lining 15, the opening 16 narrows, that is, the first gap 5 narrows, the gas flow rate decreases, and the maximum movement speed is constrained. The closer the inner shell 2 is, the greater the constraint is, thereby achieving a protective function.

[0071] The above describes the scheme according to the embodiment of the present disclosure with reference to the accompanying drawings. By arranging a connector in the outer shell, the connector can separate the inner cavity of the outer shell into a first air chamber and a first liquid chamber. Since the position or shape of the connector itself can change according to the pressure difference between the first air chamber and the first liquid chamber to balance the pressure between the first air chamber and the first liquid chamber, the change of the position or shape of the connector itself can respond to the fluid pulsation in the low frequency band. By arranging a bladder in the inner shell, the characteristic that the bladder can quickly respond to the fluid pulsation can be used to ensure that the bladder absorbs high-frequency pulsation. Therefore, through the joint action of the bladder and the intermediate piece, the accumulator can adapt to a larger range of pressure differences and pulsations in a wider frequency band. By arranging a connector with a variable shape or position, the pressure balance point is determined by the change of the shape or position of the connector itself. When the first air chamber is filled with gas and connected to the hydraulic system, the pressure of the hydraulic system can be automatically adapted by the change of the shape or position of the connector itself. The change of the shape and position of the connector itself increases the pressure of the hydraulic system that can be adapted. Thus, the present disclosure can adapt to a hydraulic system with a wide pressure and a wide frequency.

[0072] The basic principles of the present disclosure are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, and are not limitations. The above details do not limit the present disclosure to the necessity of adopting the above specific details to be implemented.

[0073] The block diagrams of the devices, apparatuses, equipment, and systems involved in this disclosure are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including," "comprising," "having," and the like are open words, referring to "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or," and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0074] Additionally, as used herein, "or" used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the example described is preferred or better than other examples.

[0075] It should also be noted that in the system and method of the present disclosure, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present disclosure.

[0076] Various changes, substitutions, and modifications of the techniques described herein may be made without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of the present disclosure is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and actions described above. Currently existing or later to be developed processes, machines, manufactures, compositions of events, means, methods, or actions that perform substantially the same functions or achieve substantially the same results as the corresponding aspects described herein may be utilized. Thus, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or actions within their scope.

[0077] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0078] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A wide voltage and wide frequency pulse elimination accumulator, characterized in that: include, An outer shell (1) having a first end sealedly connected to an outer end cover (11) and a second end provided with a liquid inlet (12) for connecting to a hydraulic pipeline; An inner shell (2) is arranged inside the outer shell (1); a connecting member (3), the connecting member (3) connecting the inner shell (2) and the outer shell (1), and dividing the inner cavity of the outer shell (1) into a first air chamber (13) and a first liquid chamber (14); the first liquid chamber (14) is located on a side of the inner shell (2) close to the liquid inlet (12); the connecting member (3) can adjust its position or shape when there is a pressure difference between the first air chamber (13) and the first liquid chamber (14) to balance the pressure of the first air chamber (13) and the first liquid chamber (14); The inner shell (2) is cylindrical, and has a first through hole (21) communicating with the first liquid chamber (14) at its first end, and a second through hole (22) communicating with the first air chamber (13) at its second end; A leather bladder (4), wherein the leather bladder (4) is arranged in the inner shell (2), and the opening (16) of the leather bladder (4) is connected to the second through hole (22); the leather bladder (4) divides the space in the inner shell (2) into a second air chamber (41) and a second liquid chamber (42); the second air chamber (41) is connected to the first air chamber (13), and the second liquid chamber (42) is connected to the second air chamber (41).

2. The wide-voltage and wide-band pulse elimination accumulator according to claim 1, characterized in that: The connecting member (3) is a bellows (31), a first end of the bellows (31) is sealedly connected to a first end of the outer shell (1), and the bellows (31) extends inside the outer shell (1); The second end of the bellows (31) is sealedly connected to the first end of the inner shell (2).

3. The wide-voltage and wide-band pulse elimination accumulator according to claim 2, characterized in that: An inner liner (15) is fixedly provided on the outer end cover (11), and the inner liner (15) is located in the first air chamber (13); An opening (16) is provided at one end of the inner liner (15) away from the outer end cover (11); The second end of the inner shell (2) can extend into the inner liner (15) through the opening (16); A first gap (5) is preset between the outer periphery of the inner shell (2) and the inner liner (15).

4. The wide-voltage and wide-band pulse elimination accumulator according to claim 3, characterized in that: The outer shell (1), the outer end cover (11), the bellows (31) and the inner shell (2) are coaxially arranged.

5. The wide-voltage and wide-band pulse elimination accumulator according to claim 1, characterized in that: The connecting member (3) is a piston (32), and the piston (32) is installed in the outer shell (1) in a sliding and sealing manner; The piston (32) is provided with a mounting hole (321), and the mounting hole (321) passes through the piston (32); The inner housing (2) is installed in the installation hole (321); the first through hole (21) faces the first liquid chamber (14); and the second through hole (22) faces the first air chamber (13).

6. The wide-voltage and wide-band pulse elimination accumulator according to claim 5, characterized in that: A plurality of annular sealing grooves (322) are provided on the outer periphery of the piston (32), and a sealing ring (323) is provided in the sealing groove (322).

7. The wide-voltage and wide-band pulse elimination accumulator according to claim 5, characterized in that: The outer end cover (11) protrudes in a direction away from the liquid inlet (12) to form an accommodating space (17) capable of accommodating the second end of the inner shell (2); a second gap (6) is formed between the outer periphery of the inner shell (2) and the inner wall of the outer end cover (11).

8. The wide-voltage and wide-band pulse elimination accumulator according to claim 5, characterized in that: The outer shell (1), the outer end cover (11), the inner shell (2) and the piston (32) are coaxially arranged.

9. The wide-voltage and wide-band pulse elimination accumulator according to any one of claims 1 to 8, characterized in that: The liquid inlet (12) is used to be connected to the main pipeline of the hydraulic system.

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