Wide voltage and wide frequency pulse-free energy accumulator

Abstract

The present disclosure relates to the technical field of hydraulic systems, and particularly provides a wide-pressure and wide-frequency pulse-eliminating accumulator, comprising an outer end cover sealingly connected to a first end of an outer shell, a liquid inlet for connecting with a hydraulic pipeline arranged at a second end of the outer shell; an inner shell arranged in the outer shell; a connecting piece for connecting the inner shell and the outer shell, and separating an inner cavity of the outer shell into a first gas chamber and a first liquid chamber; the first liquid chamber is located at a side of the inner shell close to the liquid inlet; the connecting piece can adjust its position or shape when there is a pressure difference between the first gas chamber and the first liquid chamber; a first through hole in communication with the first liquid chamber is arranged at a first end of the inner shell, and a second through hole in communication with the first gas chamber is arranged at a second end of the inner shell; a bladder is arranged in the inner shell, and an opening of the bladder is in communication with the second through hole; the bladder separates a space in the inner shell into a second gas chamber and a second liquid chamber; the second gas chamber is in communication with the first gas chamber, and the second liquid chamber is in communication with the second gas chamber. The present disclosure can adapt to a hydraulic system with a large pressure variation range and a wide pulse frequency band.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of hydraulic systems, in particular to a wide-pressure and wide-frequency pulse-damping accumulator. BACKGROUND

[0002] In a fluid pipeline system, due to the discontinuity of 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, so reducing pulsation is beneficial to prolonging system life and enhancing reliability.

[0003] In a pipeline system, an accumulator is often used to store energy, supplement flow, eliminate fluid pulsation, etc. Its main structure includes a variable-volume gas chamber and a liquid chamber. The working principle is that when the liquid chamber pressure increases, the gas chamber is compressed due to the compressibility of the gas, achieving storage of the first liquid chamber flow and hydraulic energy. When the liquid chamber pressure drops, the gas chamber expands to push the liquid back to the system, achieving flow supplementation and energy release.

[0004] Although the existing accumulator can adapt to a pipeline system with a large range of pressure changes, the attenuation frequency domain range is narrow and concentrated in the low frequency band, and has little effect on high-frequency fluid pulsation. SUMMARY

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

[0006] According to one aspect of the present disclosure, a wide-pressure and wide-frequency pulse-damping accumulator is provided, comprising,

[0007] an outer shell body, a first end of which is sealingly connected with an outer end cover, and a second end of which is provided with a liquid inlet for connecting with a hydraulic pipeline;

[0008] an inner shell body, which is arranged in the outer shell body;

[0009] a connecting piece, which connects the inner shell body and the outer shell body, and separates the inner cavity of the outer shell body into a first gas chamber and a first liquid chamber; the first liquid chamber is located on the side of the inner shell body close to the liquid inlet; the connecting piece can adjust its position or shape when there is a pressure difference between the first gas chamber and the first liquid chamber, so as to balance the pressure of the first gas chamber and the first liquid chamber;

[0010] the inner shell body is cylindrical, a first through hole in communication with the first liquid chamber is arranged at a first end of the inner shell body, and a second through hole in communication with the first gas chamber is arranged at a second end of the inner shell body;

[0011] A skin bag is arranged in the inner casing, and an opening of the skin bag is communicated with the second through hole; the skin bag divides a space in the inner casing into a second gas chamber and a second liquid chamber; the second gas chamber is communicated with the first gas chamber, and the second liquid chamber is communicated with the second gas chamber.

[0012] The wide-pressure wide-frequency pulse-eliminating accumulator as claimed in any one of the preceding claims, wherein the connecting member is a bellows, a first end of the bellows is sealingly connected to the first end of the outer casing, and the outer casing extends inside the bellows.

[0013] A second end of the bellows is sealingly connected to the first end of the inner casing.

[0014] The wide-pressure wide-frequency pulse-eliminating accumulator as claimed in any one of the preceding claims, wherein an inner liner is fixedly arranged on the outer end cover, and the inner liner is arranged in the first gas chamber.

[0015] An opening is arranged on a distal end of the inner liner away from the outer end cover.

[0016] A second end of the inner casing can extend into the inner liner through the opening.

[0017] A first gap is arranged between an outer periphery of the inner casing and the inner liner.

[0018] The wide-pressure wide-frequency pulse-eliminating accumulator as claimed in any one of the preceding claims, wherein the outer casing, the outer end cover, the bellows and the inner casing are coaxially arranged.

[0019] The wide-pressure wide-frequency pulse-eliminating accumulator as claimed in any one of the preceding claims, wherein the connecting member is a piston, and the piston is slidingly and sealingly arranged in the outer casing.

[0020] An installation hole is arranged on the piston, and the installation hole penetrates the piston.

[0021] The inner casing is arranged in the installation hole; the first through hole faces the first liquid chamber; and the second through hole faces the first gas chamber.

[0022] The wide-pressure wide-frequency pulse-eliminating accumulator as claimed in any one of the preceding claims, wherein a plurality of annular sealing grooves are arranged on an outer periphery of the piston, and sealing rings are arranged in the sealing grooves.

[0023] The wide-pressure wide-frequency pulse-eliminating accumulator as claimed in any one of the preceding claims, wherein the outer end cover is convex away from the liquid inlet, and forms a containing space capable of containing the second end of the inner casing; and a second gap is formed between an outer periphery of the inner casing and an inner wall of the outer end cover.

[0024] The wide-pressure wide-frequency pulse-eliminating accumulator as described above, wherein, optionally, the outer housing, the outer end cover, the inner housing and the piston are coaxially arranged.

[0025] The wide-pressure wide-frequency pulse-eliminating accumulator as described above, wherein, optionally, the liquid inlet is used to connect with a main pipeline of a hydraulic system.

[0026] As will be described in detail below, the wide-pressure wide-frequency pulse-eliminating accumulator according to the embodiments of the present disclosure can separate the inner cavity of the outer housing into a first gas chamber and a first liquid chamber by arranging a connecting piece in the outer housing, and the connecting piece can change due to the pressure difference between the first gas chamber and the first liquid chamber, so as to balance the pressure between the first gas chamber and the first liquid chamber. The change of the position or shape of the connecting piece can respond to the fluid pulsation in the low frequency band. By arranging a bladder in the inner housing, the bladder can quickly respond to the characteristics of fluid pulsation, so as to ensure that the bladder absorbs high-frequency pulsation. Thus, through the joint action of the bladder and the connecting piece, the accumulator can adapt to a larger range of pressure difference and a wider frequency band of pulsation.

[0027] By arranging the connecting piece with variable shape or position, the pressure balance point is determined by the change of the shape or position of the connecting piece. When the first gas chamber is filled with gas and connected to the hydraulic system, the connecting piece can automatically adapt to the pressure of the hydraulic system by changing its shape or position. The change of the shape and position of the connecting piece increases the pressure of the hydraulic system that can be adapted. Thus, the present disclosure can adapt to a wider range of pressure changes and a wider frequency band of pulsation.

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

[0029] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

[0030] Figure 1 is a structural schematic diagram of a first wide-pressure wide-frequency pulse-eliminating accumulator according to the present disclosure;

[0031] Figure 2 is a structural schematic diagram of a second wide-pressure wide-frequency pulse-eliminating accumulator according to the present disclosure.

[0032] BRIEF DESCRIPTION OF DRAWINGS

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

[0034] 11-outer end cover, 12-liquid inlet, 13-first air chamber, 14-first liquid chamber, 15-inner liner, 16-opening, 17-receiving 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 scheme and advantages of the present disclosure more obvious, the example embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, not all embodiments of the present disclosure, and it should be understood that the present disclosure is not limited to the example embodiments described here.

[0040] For the problems raised in the background art, the present application proposes the following solutions to solve them.

[0041] Please refer to Figure 1 In one implementation, a first wide pressure wide frequency pulse damper accumulator is proposed, which comprises an outer shell 1, an inner shell 2, a connector 3 and a skin bag 4. Among them, the outer shell 1 is used to support the whole structure and is connected with the hydraulic system, the inner shell 2 is used to fix the skin bag 4, the connector 3 is used to realize the self-adaptive adjustment of the pressure on both sides and respond to low-frequency pulsation, and the skin bag 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 sealingly connected with the outer end cover 11, and the second end is provided with the liquid inlet 12 for connecting with the hydraulic pipeline; in specific implementation, the outer shell 1 and the first end can be sealingly connected by threads, or other ways of sealing connection, in specific implementation, in order to facilitate the inflation of the outer shell 1, an inflation port can be provided on the outer end cover 11, so as to inflate the gas with corresponding pressure as needed. Of course, in some implementations, the inflation port can be plugged after inflating the gas with a predetermined pressure.

[0043] The inner shell 2 is arranged in the outer shell 1; in specific implementation, in order to ensure that the accumulator is self-adaptive to the pressure of the hydraulic system, the inner shell 2 is slidingly arranged in the outer shell 1.

[0044] The connecting piece 3 connects the inner shell 2 and the outer shell 1, and divides the inner cavity of the outer shell 1 into a first gas 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 connecting piece 3 can adjust its position or shape when there is a pressure difference between the first gas chamber 13 and the first liquid chamber 14, so as to balance the pressure of the first gas chamber 13 and the first liquid chamber 14; in specific implementation, the inner shell 2 can reciprocate between the first gas chamber 13 and the first liquid chamber 14 in the outer shell 1, so as to eliminate the pulsation of the hydraulic system. Due to the arrangement of the connecting piece 3, the connecting piece 3 serves as a carrier for the reciprocating movement of the inner shell 2, and the inner shell 2 can be moved through the deformation or movement of the connecting piece 3, so as to finally form the reciprocating movement of the inner shell 2 near the balance point. The hydraulic system with different pressures corresponds to different balance points, and the movable arrangement of the inner shell 2 enables the present disclosure to adapt to hydraulic systems with different pressures.

[0045] Specifically, the inner shell 2 is cylindrical, and a first through hole 21 in communication with the first liquid chamber 14 is arranged at the first end of the inner shell 2, and a second through hole 22 in communication with the first gas chamber 13 is arranged at the second end of the inner shell 2; further, the inner shell 2 is cylindrical, and inner end covers are sealingly connected to the two ends of the inner shell 2, and the first through hole 21 and the second through hole 22 are arranged on the inner end covers.

[0046] The skin bag 4 is arranged in the inner shell 2, and an opening 16 of the skin bag 4 is in communication with the second through hole 22; the skin bag 4 divides the space in the inner shell 2 into a second gas chamber 41 and a second liquid chamber 42; the second gas chamber 41 is in communication with the first gas chamber 13, and the second liquid chamber 42 is in communication with the second gas chamber 41. In specific implementation, the skin bag 4 can be cylindrical or have other shapes, as long as it can be sealingly connected to the inner shell 2 and divide the inner shell 2 into the second gas chamber 41 and the second liquid chamber 42. However, considering that the skin bag 4 needs to quickly respond to high-frequency pulsation, in a preferred manner, the skin bag 4 can be arranged in the form of a pocket, specifically, in a natural state, a cylindrical shape with an open end is formed. In this way, the contact area of the skin bag 4 with the second liquid chamber or the second gas chamber can be increased, so that the skin bag 4 can quickly respond to the high-frequency pulsation of the hydraulic system.

[0047] By arranging the connecting piece 3, the position of the connecting piece 3 can be automatically adjusted according to the pressure difference between the first gas chamber and the first liquid chamber, which can help to adjust the skin bag 4 to the balance position as much as possible compared with using only the skin bag 4, so as to reduce the long-term tension of the skin bag 4 caused by the change of the system pressure, help to ensure the service life of the skin bag 4, and make the skin bag 4 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 sealingly connected with the first end of the outer shell 1, and the outer shell 1 extends inside the bellows 31; the second end of the bellows 31 is sealingly connected with the first end of the inner shell 2. In a specific implementation, when the pressure in the first gas chamber 13 is greater than the pressure in the first liquid chamber 14, the bellows 31 is stretched until the pressure in the first gas chamber 13 is substantially equal to the pressure in the first liquid chamber 14; when the pressure in the first gas chamber 13 is less than the pressure in the first liquid chamber 14, the bellows 31 is compressed until the pressure in the first gas chamber 13 is substantially equal to the pressure in the first liquid chamber 14, in this way, the self-adaptive adjustment according to the pressure of the hydraulic system can be achieved, so that the present disclosure can adapt to hydraulic systems with different pressures.

[0049] In a specific implementation, in order to further expand the working pressure range of the present disclosure, in the present embodiment, an inner liner 15 is fixedly arranged on the outer end cover 11, and the inner liner 15 is located in the first gas chamber 13; the inner liner 15 is provided with an opening 16 at an end 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; and a first gap 5 is prearranged between the outer periphery of the inner shell 2 and the inner liner 15. In a specific implementation, the inner liner 15 is designed to be concave, and when the bellows 31 is completely contracted, it fills a part of the incompressible gas chamber space, so as to increase the volume change multiple of the first gas chamber, thereby expanding the working pressure range. In addition, the inner liner 15 is designed to be concave, and when the inner shell 2 extends into the inner liner 15, a gas spring is formed, which provides a certain buffering effect for the contraction movement of the bellows 31.

[0050] The bellows 31 moves under the joint action of the first gas chamber 13 and the first liquid chamber 14 to adjust the pressure in the first gas chamber 13, realize the following of the mean value of the pressure of the first liquid chamber, and 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 resonator, and by selecting appropriate design parameters, the resonance frequency of the resonator can be matched with the system pulsation frequency.

[0051] Through the above structure, in the present embodiment, the bellows 31 and the bladder 4 have two structures that attenuate high and low frequency pulsations. The volume compensation of the bellows 31 enables the device to maintain working ability under a large range of changing pressures.

[0052] In some preferred embodiments, the outer shell 1, the outer end cover 11, the bellows 31 and the inner shell 2 are coaxially arranged. In this way, the stability of the accumulator during operation can be ensured.

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

[0054] Before use, the bellows 31 is in a fully stretched state, and the system starts to increase the pressure. When the pressure of the first liquid chamber 14 is greater than the pressure of the first gas chamber 13, the bellows 31 starts to contract due to the internal and external pressure difference, and the gas in the first gas chamber 13 is compressed until the internal and external pressure is balanced, so that the skin bag 4 is in a free motion state, and the high-frequency flow pulsation is absorbed by the contraction and expansion motion of the skin bag 4; when the pressure of the first liquid chamber 14 is less than the pressure of the first gas chamber 13, the bellows 31 starts to expand due to the internal and external pressure difference until the internal and external pressure is balanced, and the skin bag 4 can also absorb the high-frequency flow pulsation.

[0055] The flow pulsation and the pressure pulsation are often superimposed by several sine functions in the time domain, and fluctuate up and down around the mean value. The pressure of the first gas chamber 13 is consistent with the mean value of the pressure of the first liquid chamber 14 under the movement of the bellows 31. When the pulsation pressure is greater than the mean value, the skin bag 4 is compressed to absorb part of the flow of the main pipeline. When the pulsation pressure is less than the mean value, the skin bag 4 expands to supplement part of the flow of the main pipeline, so as to realize the attenuation of the main pipeline pulsation.

[0056] The flow pulsation in the pipeline usually has the characteristics of wide distribution frequency domain and is located in the medium and high frequency. In a high-pressure system, a small amplitude flow pulsation can cause a large amplitude pressure pulsation, so a skin bag 4 with wide resonance frequency and small compensation volume can effectively absorb the flow pulsation.

[0057] When the bellows 31 is compressed to the limit and the system pressure continues to increase, the skin bag 4 is also compressed, so that the device loses the attenuation effect on the pulsation. Therefore, when the bellows 31 is compressed to the limit, the pressure in the first gas chamber 13 is the boundary of the working pressure range of the device, and increasing the pressure change range of the first gas chamber 13 can increase the working range of the device.

[0058] Please refer to Figure 2 In another implementation manner, the second wide-pressure wide-frequency pulse-eliminating energy accumulator is also provided in the disclosure, wherein, compared with the first wide-pressure wide-frequency pulse-eliminating energy accumulator, the difference mainly lies in that the connecting piece 3 is different, the inner liner on the outer end cover 11 is cancelled, and the structure of the outer end cover 11 is changed. In the following description, the same parts will not be described again, and only the different parts will be described.

[0059] Please refer to Figure 2 The connecting piece 3 is a piston 32, and the piston 32 is slidingly and sealingly installed in the outer shell 1. That is, the piston 32 can slide along the axis direction of the outer shell 1. In the scheme, the outer shell 1 can be preferably a cylindrical structure, and of course can also be other columnar structures with the same section.

[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; the inner housing 2 is mounted in the mounting hole 321; the first through hole 21 is directed to the first liquid chamber 14; and the second through hole 22 is directed to the first gas chamber 13. Thus, by providing the piston 32, the inner housing 2 can move under the pressure difference between the first gas chamber 13 and the first liquid chamber 14, and the piston 32 is in sealing connection with the outer housing 1 during the movement. The piston 32 can adaptively adjust the position of the inner housing 2 so as to adapt to the hydraulic system with different pressures, and can be applied to the hydraulic system with a wider pressure range. Meanwhile, the piston 32 can eliminate the flow pulsation in the low frequency band, and the bladder 4 can eliminate the flow pulsation in the high frequency band.

[0061] In the specific implementation, in order to ensure the sealing between the piston and the outer housing 1, a plurality of annular sealing grooves 322 are arranged on the outer periphery of the piston 32, and a sealing ring 323 is arranged in each sealing groove 322. Specifically, in some implementations, three sealing grooves 322 are arranged on the outer periphery of the piston 32, and one sealing ring 323 is arranged in each sealing groove 322 to ensure good sealing effect.

[0062] In some implementations, in order to expand the working pressure range of the device, the outer end cover 11 is convex in the direction away from the liquid inlet 12, forming a containing space 17 which can accommodate the second end of the inner housing 2; and a second gap 6 is formed between the outer periphery of the inner housing 2 and the inner wall of the outer end cover 11. The outer end cover 11 is designed to be convex, the containing space 17 can accommodate the inner housing 2, and the gas cavity on both sides is filled to reduce the gas volume when the first gas 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, when the inner housing 2 extends into the containing space, the internal gas is compressed to form a gas spring which provides a certain buffering effect for the contraction movement of the piston 32.

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

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

[0065] For the Helmholtz resonator, the transmission loss is:

[0066]

[0067] TL represents the difference between the incident sound energy and the transmitted sound energy, the greater the more the device absorbs energy, wherein A represents the area of the inlet. For the inlet 12, the area has an effect on the absorption of flow pulsations, which is manifested in that the larger the area, the greater the liquid flow in the neck reciprocating motion, the better the absorption of flow pulsations by the device. Therefore, the design principle of the inlet area should be as large as possible.

[0068] The first through hole 21 connects the first liquid cavity and the second liquid cavity, and plays a role of passing fluid during the repeated expansion and contraction of the bladder. The 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 bladder. Therefore, the through hole area should be as large as possible as long as the bladder 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 accommodation space 17 is basically compressed when the connecting piece 3 is compressed. The second gas chamber 41 is designed to still have a part of space when the connecting piece 3 is completely compressed. Therefore, the gas pressure in the accommodation space 17 grows faster than that in the second gas chamber 41 when the connecting piece 3 is compressed, and the gas 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 fast and causing impact and damage to the structure when approaching the inner liner 15. There is a pressure difference between the accommodation space 17 and the second gas chamber 41, and the gas flows from the accommodation space 17 to the second gas chamber 41. The flow rate determines the speed at which the pressure in the two chambers reaches equilibrium, and also affects the maximum movement speed of the connecting piece 3. At the same time, the faster the connecting piece 3 is compressed, the faster the gas pressure in the accommodation space 17 grows, and the greater the stiffness of the gas spring, which can effectively limit the movement speed of the connecting piece 3.

[0070] The inner liner 15 is made into a flared shape with a narrow top and a wide bottom. The opening 16 will gradually narrow during the upward movement of the inner shell 2. When the inner shell 2 is away from the inner liner 15, the first gap 5 is wide, and the movement speed is small. When the inner shell 2 approaches the inner liner 15, the opening 16 narrows, i.e. the first gap 5 narrows, and the gas flow rate decreases, limiting the maximum movement speed. The closer it is, the greater the constraint, achieving the protection function.

[0071] The above describes the scheme according to the embodiments of the present disclosure with reference to the drawings, by setting the connecting piece in the outer shell, the connecting piece can separate the inner cavity of the outer shell into the first gas chamber and the first liquid chamber, due to the position or shape of the connecting piece itself can change according to the pressure difference between the first gas chamber and the first liquid chamber, to balance the pressure between the first gas chamber and the first liquid chamber, the change of the position or shape of the connecting piece itself can respond to the fluid pulsation of the low frequency band, by setting the bladder in the inner shell, the bladder can quickly respond to the characteristics of the fluid pulsation, and can ensure that the bladder absorbs high frequency pulsation. Thus, through the joint action of the bladder and the intermediate piece, the accumulator can adapt to a larger range of pressure difference and a wider frequency band of pulsation. By setting the connecting piece with variable shape or position, the pressure balance point is determined by the change of the shape or position of the connecting piece itself, when the first gas 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 connecting piece itself. The change of the shape and position of the connecting piece itself increases the pressure of the hydraulic system that can be adapted. Thus, the present disclosure can adapt to a wide pressure and a wide frequency of the hydraulic system.

[0072] The above describes the basic principles of the present disclosure in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present disclosure are only examples and not limitations, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present disclosure. In addition, the above specific details are only for the purpose of example and for the purpose of understanding, and are not limited to the above specific details to realize the present disclosure.

[0073] The block diagrams of the devices, apparatuses, equipment, systems involved in the present disclosure are only illustrative examples and are not intended to require or imply the connection, arrangement, configuration shown in the block diagram. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any way. Words such as "include", "contain", "have" and the like are open-ended words, which mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0074] In addition, as used herein, "or" used in the list of items starting with "at least one" indicates separate listing, so that for example, the 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). In addition, the word "exemplary" does not mean that the described example is preferred or better than other examples.

[0075] It is also important to note that the systems and methods of the present disclosure can be implemented in a variety of ways. The systems and methods can be implemented using computer hardware or using computer hardware in combination with software. Further, the systems and methods can be implemented as computer program products. Accordingly, embodiments of the present disclosure can be viewed as being composed of various interrelated computer hardware components.

[0076] Various changes, modifications, and amendments can be made to the techniques described herein without departing from the technology defined by the appended claims. Further, the scope of the claims of the present disclosure is not limited to the specific aspects described above. Rather, current or future existing processes, machines, manufactures, compositions of matter, means, methods, or steps for accomplishing a result can be utilized that are essentially the same as those described herein without departing from the scope of the claims. Accordingly, the appended claims include within their scope such processes, machines, manufactures, compositions of matter, means, methods, or steps.

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

[0078] The above description has been presented for the purpose of illustration and description. Further, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although various example aspects and embodiments have been discussed above, those of ordinary skill in the art will appreciate a variety of modifications, alternative constructions, permutations, and equivalents.

Claims

1. A wide pressure wide frequency pulseless accumulator, characterized by, The utility model relates to a kind of hydraulic accumulator, comprising, Outer shell (1), first end sealing connection has outer end cover (11), second end is equipped with for being connected with hydraulic pipeline and enters liquid port (12); Inner shell (2) is arranged in the outer shell (1); Connecting piece (3), the connecting piece (3) connects the inner shell (2) with the outer shell (1), and the inner cavity of the outer shell (1) is divided into first gas chamber (13) and first liquid chamber (14);The first liquid chamber (14) is located in the inner shell (2) close to the side of liquid inlet (12);The connecting piece (3) can adjust its position or shape when the pressure difference exists between the first gas chamber (13) and the first liquid chamber (14), to balance the pressure of the first gas chamber (13) and the first liquid chamber (14); The inner shell (2) is cylindrical, and the first end is provided with a first through hole (21) communicating with the first liquid chamber (14), and the second end is provided with a second through hole (22) communicating with the first gas chamber (13); Skin bag (4), the skin bag (4) is arranged in the inner shell (2), and the opening (16) of the skin bag (4) is communicated with the second through hole (22);The skin bag (4) divides the space in the inner shell (2) into second gas chamber (41) and second liquid chamber (42);The second gas chamber (41) is communicated with the first gas chamber (13), and the second liquid chamber (42) is communicated with the second gas chamber (41).

2. The wide pressure wide frequency pulseless accumulator of claim 1, wherein, The connecting piece (3) is a bellows (31), the first end of the bellows (31) is sealingly connected with the first end of the outer shell (1), and the outer shell (1) extends inside the bellows (31); The second end of the bellows (31) is sealingly connected with the first end of the inner shell (2).

3. The wide pressure wide frequency pulseless accumulator of claim 2, wherein, The outer end cover (11) is fixedly provided with an inner liner (15), and the inner liner (15) is located in the first gas chamber (13); The end of the inner liner (15) away from the outer end cover (11) is provided with an opening (16); The second end of the inner shell (2) can extend into the inner liner (15) through the opening (16); A first gap (5) is provided between the outer periphery of the inner shell (2) and the inner liner (15).

4. The wide pressure wide frequency pulse-free accumulator of claim 3, wherein, The outer shell (1), the outer end cover (11), the bellows (31) and the inner shell (2) are coaxially arranged.

5. The wide pressure wide frequency pulse-free accumulator of claim 1, wherein, The connecting piece (3) is a piston (32), and the piston (32) is slidingly and sealingly installed in the outer shell (1); The piston (32) is provided with a mounting hole (321), and the mounting hole (321) penetrates the piston (32); The inner shell (2) is installed in the mounting hole (321), the first through hole (21) faces the first liquid chamber (14), and the second through hole (22) faces the first gas chamber (13).

6. The wide pressure wide frequency pulseless accumulator of claim 5, wherein, A plurality of annular sealing grooves (322) are provided on the outer periphery of the piston (32), and a sealing ring (323) is arranged in each sealing groove (322).

7. The wide pressure wide frequency pulse-free accumulator of claim 5, wherein, The outer end cover (11) protrudes away from the liquid inlet (12) to form a containing space (17) capable of containing 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 pressure wide frequency pulse-free accumulator of claim 5, wherein, The outer shell (1), the outer end cover (11), the inner shell (2) and the piston (32) are coaxially arranged.

9. The wide pressure wide frequency pulse-free accumulator of any one of claims 1-8, wherein, The liquid inlet (12) is used to be connected with the main pipeline of the hydraulic system.

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