Damping devices for energy storage devices, manufacturing methods, energy storage devices and operating machinery

Abstract

This invention relates to the field of hydraulic systems for working machinery, providing a damping device for an accumulator, a manufacturing method, an accumulator, and working machinery. The damping device includes a first profile and a second profile. The manufacturing method includes: machining multiple first channels through the first profile; machining multiple second channels on the second profile; axially abutting the first and second profiles; adjusting the overlap of the first and second channels according to a preset damping coefficient of the damping device to form damping channels with a preset damping coefficient, allowing oil to be introduced into or out of the accumulator through the multiple damping channels; and fixing the first and second profiles together to form an oil guiding structure for the oil inlet of the accumulator. By installing a damping device at the oil inlet of the accumulator, oil is introduced into or out of the accumulator through multiple damping channels on the damping device. During the oil guiding process, the oil impacts the damping device and is diverted by the multiple damping channels, thus damping the oil.

Description

Technical Field

[0001] This invention relates to the field of hydraulic system technology for working machinery, and more particularly to a damping device for an accumulator, a manufacturing method, an accumulator, and working machinery. Background Technology

[0002] Hydraulic systems of various types are indispensable components in many modern construction machines. Most tractors, loaders, excavators, and other off-highway construction machinery use hydraulic systems for their work implements. An accumulator is an energy storage device in a hydraulic system. It converts energy in the system into compressed energy or potential energy at appropriate times and stores it. When the system needs it, it converts the compressed energy or potential energy back into hydraulic or pneumatic energy to replenish the system. When the system pressure increases instantaneously, it can absorb this energy to ensure the normal pressure of the entire system. Therefore, accumulators are often used to reduce hydraulic shocks in the system.

[0003] Because the oil has an impact force during the inflow and outflow of relative to the accumulator, a mushroom valve is generally installed at the oil inlet of the accumulator to dampen and dissipate the energy of the oil. The valve stem of the mushroom valve is connected to a mushroom-shaped valve core structure used to seal the oil inlet. During the inflow and outflow of the oil, the impact on the mushroom head of the mushroom valve is damped and dissipated, and the valve core and valve stem move relative to the valve seat shaft hole, thereby switching the oil inlet between the open and closed states. However, because the valve core of the mushroom valve moves with the oil during the inflow and outflow, there is axial friction between it and the valve seat shaft hole. After friction damage occurs, the gap between the shaft hole and the valve core will increase, the guiding performance will deteriorate, and the offset movement will occur, which will seriously affect the reliability of the overall structure of the mushroom valve. Furthermore, to guide the valve core of the mushroom valve, a precision fit is required, resulting in a complex design structure and high processing costs.

[0004] Therefore, how to design an oil guiding device that can reduce vibration and dissipate energy for oil inlet and outlet, with a simple structure and high reliability, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a damping device, manufacturing method, accumulator, and operating machinery for an accumulator, which solves the defects of the mushroom-shaped valve used for damping and dissipating the vibration of oil at the oil inlet of the accumulator in the prior art. The mushroom valve has a complex structure, high processing cost, and poor overall structural reliability. This invention provides an oil guiding device that can dampen and dissipate the vibration of incoming and outgoing oil, has a simple structure, and high structural reliability.

[0006] This invention provides a method for manufacturing a damping device for an energy storage device, the damping device comprising a first profile and a second profile, the manufacturing method comprising the following steps:

[0007] Multiple first channels are machined through the first profile, and multiple second channels are machined through the second profile.

[0008] The first profile and the second profile abut against each other along the axial direction;

[0009] The overlap between the first channel and the second channel is adjusted according to the preset damping coefficient of the damping device to form a damping channel with the preset damping coefficient, wherein oil can be introduced into or exported from the accumulator through multiple damping channels.

[0010] The first profile and the second profile are fixedly connected to form an oil guiding structure for the oil guide port of the accumulator.

[0011] A method for manufacturing a damping device for an energy storage device according to the present invention further includes, before bringing the first profile and the second profile together axially:

[0012] A groove is machined at one end of the first profile that contacts the second profile, so that after the first profile and the second profile abut against each other, a receiving cavity is formed between the first profile and the second profile, wherein a plurality of first channels and a plurality of second channels are connected to the receiving cavity.

[0013] According to a method for manufacturing a damping device for an energy storage device provided by the present invention, the step of adjusting the overlap between the first channel and the second channel according to a preset damping coefficient of the damping device to form a damping channel having the preset damping coefficient includes:

[0014] One of the first channel and the second channel is illuminated by a light source, allowing light to pass through the other;

[0015] Obtain the light-transmitting area, and determine the damping coefficient of the damping channel based on the preset relationship between the light-transmitting area and the damping coefficient.

[0016] According to a method for manufacturing a damping device for an energy storage device provided by the present invention, a plurality of first channels and second channels are respectively processed on the first profile and the second profile by laser cutting.

[0017] According to a method for manufacturing a damping device for an energy storage device provided by the present invention, the cross-section of the first channel and / or the second channel is a slot structure extending in an arc shape.

[0018] The present invention also provides a damping device for an energy storage device, comprising:

[0019] An oil guiding structure is provided at the oil guide port of the accumulator, the oil guiding structure comprising a first profile and a second profile connected to each other;

[0020] Multiple damping channels are used to introduce or export oil into the accumulator and to provide damping for the oil. The damping channels include a first channel and a second channel that are connected to each other. The first channel is disposed through the first profile and the second channel is disposed through the second profile.

[0021] According to the present invention, a damping device for an energy storage device is provided, wherein a receiving cavity is provided between the first profile and the second profile, and a plurality of first channels are connected to the receiving cavity, and a plurality of second channels are connected to the receiving cavity.

[0022] According to a damping device for an energy storage device provided by the present invention, a groove is provided on one side of the first profile, and the groove opening is blocked on one side of the second profile, so that the receiving cavity is formed between the first profile and the second profile.

[0023] The present invention also provides an energy storage device, comprising:

[0024] Oil guide port;

[0025] As described above, the damping device for an energy storage device has an oil guide structure disposed at the oil guide port.

[0026] The present invention also provides a working machine, comprising:

[0027] Hydraulic system;

[0028] The accumulator as described above is mounted on the hydraulic system.

[0029] This invention provides a damping device, manufacturing method, accumulator, and operating machinery for an accumulator. The damping device includes a first profile and a second profile. The manufacturing method of the damping device for the accumulator includes: machining multiple first channels penetrating the first profile and machining multiple second channels penetrating the second profile; axially abutting the first and second profiles; adjusting the overlap of the first and second channels according to a preset damping coefficient of the damping device to form a damping channel with a preset damping coefficient, wherein oil can be introduced into or out of the accumulator through the multiple damping channels; and fixing the first and second profiles together to form an oil guiding structure for the oil inlet of the accumulator. By machining multiple first and second channels on the first and second profiles respectively, and adjusting the overlap of the first and second channels according to the preset damping coefficient of the damping device, the damping device can achieve the required damping.

[0030] By installing a damping device at the oil inlet of the accumulator, and through multiple damping channels on the oil guiding structure of the damping device, the oil is introduced into or out of the accumulator. During the oil guiding process, the oil impacts the damping device and is diverted by the multiple damping channels, thereby damping the impact of the oil. This reduces vibration and dissipates energy as the oil passes through the damping channels. Compared with existing mushroom valves, the damping device provided by this invention can reduce vibration and dissipate energy for the incoming and outgoing oil. The overall structure has no moving friction pairs, which increases the reliability of the structure. Moreover, the device has a simple structure and low processing cost. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the damping device for an energy storage device provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the sealing component provided in the embodiments of the present invention;

[0034] Figure 3 This is a schematic diagram of the energy storage device provided in the embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the damping device for an energy storage device provided in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the first profile provided in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the structure of the second profile provided in an embodiment of the present invention;

[0038] Figure 7 This is a schematic flowchart of a method for manufacturing a damping device for an energy storage device provided in an embodiment of the present invention.

[0039] Figure label:

[0040] 1. Oil guide port; 2. Oil guide structure; 201. First profile;

[0041] 202. Second profile; 203. Receiving cavity; 3. Damping channel;

[0042] 301, First Channel; 302, Second Channel. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0046] In the description of this specification, the references to terms such as "an embodiment," "first aspect embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] In related technologies, hydraulic systems are used in tractors, loaders, excavators and other off-highway machinery. An accumulator is an energy storage device in a hydraulic system. It converts the energy in the system into compressed energy or potential energy at appropriate times and stores it. When the system needs it, it converts the compressed energy or potential energy into hydraulic or pneumatic energy and releases it to replenish the system. When the system pressure increases instantaneously, it can absorb this part of the energy to ensure that the pressure of the entire system is normal. Therefore, accumulators are often used to reduce hydraulic shock in the system. Because the oil has an impact force during its inflow and outflow relative to the accumulator, a mushroom valve is generally installed at the oil guide port of the accumulator to dampen and dissipate the energy. The valve stem of the mushroom valve is connected to a mushroom-shaped valve core structure used to seal the oil guide port. During the oil inflow and outflow, the impact on the mushroom head of the mushroom valve is damped and dissipated, driving the valve core and valve stem to move relative to the valve seat shaft hole, thereby switching the oil guide port between open and closed states. However, due to the movement of the valve core of the mushroom valve during the oil inflow and outflow, there is axial friction between it and the valve seat shaft hole. After friction damage, the gap between the shaft hole and the valve core will increase, the guiding performance will deteriorate, and the misalignment will be caused, which will seriously affect the reliability of the overall structure of the mushroom valve. Furthermore, to guide the valve core of the mushroom valve, a precision fit is required, resulting in a complex design structure and high manufacturing cost. Based on this, the present invention provides a damping device for accumulators to replace the mushroom valve in the prior art as the oil guide device for accumulators.

[0048] The following is combined with Figures 1-7 The present invention describes a damping device for an energy storage device, a manufacturing method, an energy storage device, and an operating machine.

[0049] like Figure 7 As shown, the present invention provides a method for manufacturing a damping device for an energy storage device, which may include the following steps:

[0050] S1: Multiple first channels 301 are machined through the first profile 201, and multiple second channels 302 are machined through the second profile 202.

[0051] S2: The first profile 201 and the second profile 202 are brought together along the axial direction;

[0052] S3: Adjust the overlap of the first channel 301 and the second channel 302 according to the preset damping coefficient of the damping device to form a damping channel 3 with a preset damping coefficient, wherein the oil can be introduced into or out of the accumulator through multiple damping channels.

[0053] S4: The first profile 201 and the second profile 202 are fixedly connected to form an oil guiding structure 2 for use in the oil guide port 1 of the accumulator.

[0054] Here, the damping device may include a first profile 201 and a second profile 202.

[0055] With this configuration, by machining multiple first channels 301 and second channels 302 on the first profile 201 and the second profile 202 respectively, and adjusting the overlap of the first channels 301 and the second channels 302 according to the preset damping coefficient of the damping device, the damping device can achieve the required damping. Furthermore, by setting the damping device at the oil inlet 1 of the accumulator, the damping device can play a role in reducing vibration and dissipating energy for the oil entering and exiting the accumulator, thereby achieving a damping effect on the oil.

[0056] Furthermore, by adjusting the overlap of the first channel 301 and the second channel 302, the damping coefficient of the damping channel 3 of the damping device can be adjusted, so that the damping device can achieve different damping effects.

[0057] In an optional embodiment, the method of fixing the first profile 201 and the second profile 202 together may include:

[0058] The first profile 201 and the second profile 202 are fixedly connected by welding, interference fit, or snap-fit ​​connection.

[0059] In an optional embodiment of the present invention, the method for manufacturing a damping device for an energy storage device may further include, before the first profile 201 and the second profile 202 are brought together axially, the method further includes:

[0060] A groove is machined at one end of the first profile 201 that contacts the second profile 202, so that after the first profile 201 and the second profile 202 abut against each other, a receiving cavity 203 is formed between the first profile 201 and the second profile 202, wherein a plurality of first channels 301 and a plurality of second channels 302 are connected to the receiving cavity 203.

[0061] In this way, the oil introduced through the first channel 301 or the second channel 302 will pass through the receiving cavity 203 between the two, thereby enabling the overall damping device to have both damping and diverging effects.

[0062] In the above-described method of setting the receiving cavity 203, a milling machine can be used to sink one end of one of the first profile 201 and the second profile 202 to a certain depth to form the groove, and the other end is chamfered along the circumferential direction to abut against the groove opening, so as to improve the sealing performance of the receiving cavity 203.

[0063] In an optional embodiment of the present invention, adjusting the overlap between the first channel 301 and the second channel 302 according to the preset damping coefficient of the damping device to form a damping channel 3 with a preset damping coefficient may include:

[0064] By illuminating one of the first channel 301 and the second channel 302 with a light source, the other channel is made to transmit light.

[0065] Obtain the light-transmitting area, and determine the damping coefficient of the damping channel based on the preset relationship between the light-transmitting area and the damping coefficient.

[0066] In this way, the overlap of the first channel 301 and the second channel 302 can be adjusted according to the determined damping coefficient.

[0067] Here, the determined damping coefficient can be compared with the preset damping coefficient, and the overlap of the first channel 301 and the second channel 302 can be adjusted according to the comparison result so that the overlap of the first channel 301 and the second channel 302 reaches the required overlap.

[0068] It should be noted that the preset damping coefficient can be the desired damping coefficient.

[0069] In an optional embodiment of the present invention, multiple first channels 301 and second channels 302 can be processed on the first profile 201 and the second profile 202 respectively by laser cutting. In this way, using laser cutting can result in a narrower cutting gap, higher cutting precision, faster cutting speed, smaller heat-affected zone, and better quality cut surface with smooth edges, which is beneficial to improving the precision of the cut first channels 301 and second channels 302.

[0070] In an optional embodiment, the cross-section of the first channel 301 and / or the second channel 302 can be a slit structure extending along an arc. In this way, multiple first channels 301 and second channels 302 can form dense slits on the oil guiding structure 2, so that when the oil passes through the damping channel 3 formed in this way, it can be quickly cut and diverted, thereby achieving a better damping effect.

[0071] Here, the first channel 301 and / or the second channel 302 can be set to a gap of less than or equal to 4 mm, or a gap of less than or equal to 2 mm, and the flow area can be greater than 80% of the flow area of ​​the standard accumulator to achieve flow and buffering.

[0072] In an optional embodiment, a plurality of first channels 301 are machined through the first profile 201, and a plurality of second channels 302 are machined on the second profile 202, which may include:

[0073] Cylindrical plates are cut from steel plates with a thickness of 6 mm or more using laser cutting.

[0074] Then, laser drilling is used to drill holes in the cylindrical plate to create the first channel 301 or the second channel 302.

[0075] The damping device for an energy storage device provided by the present invention is described below. The manufacturing method of the damping device for an energy storage device described below can be referred to in correspondence with the manufacturing method of the damping device for an energy storage device described above.

[0076] The present invention provides a damping device for an accumulator, which may include an oil guiding structure 2 and multiple damping channels 3. The oil guiding structure 2 may be disposed at the oil inlet 1 of the accumulator, and the multiple damping channels 3 are disposed on the oil guiding structure 2. The multiple damping channels 3 can be used to introduce or discharge oil into the accumulator. When the oil passes through the oil inlet 1 of the accumulator during the oil inlet and outlet process, the oil impacts the oil guiding structure 2 and is diverted by the multiple damping channels 3, so as to provide a damping effect on the oil, thereby reducing vibration and dissipating energy of the oil. Furthermore, there is no moving friction pair between the oil guiding structure 2 and the oil inlet 1 of the accumulator, which improves the reliability of the accumulator.

[0077] Furthermore, the oil guiding structure 2 may include a first profile 201 and a second profile 202, which are connected to each other. The damping channel 3 may include a first channel 301 and a second channel 302, which are interconnected. The first channel 301 extends through the first profile 201, and the second channel 302 extends through the second profile 202. Thus, by adjusting the overlap of the first channel 301 and the second channel 302, different damping effects can be achieved by the damping device.

[0078] In addition, the end of the damping device near the inside of the accumulator and the end of the valve seat at the oil inlet 1 of the accumulator near the inside of the accumulator can be located on the same plane or approximately on the same plane. This prevents the airbag inside the accumulator from being squeezed into the valve seat of the accumulator, thus preventing damage to the airbag.

[0079] This configuration, by placing the damping device at the oil inlet 1 of the accumulator, can reduce vibration and dissipate energy for the incoming and outgoing oil. There is no moving friction pair between the damping device and the accumulator, thus eliminating the need to consider the problem of increased clearance due to wear and tear between the valve core and valve seat shaft hole of the mushroom valve, thereby increasing the reliability of the structure. Furthermore, the structure is simple, the processing cost is low, the production process is short, and the production process is simple. There is no need to set up a spring assembly, and the damping device will not damage the bladder during use.

[0080] In this embodiment, the first channel 301 and the second channel 302 can be structures of holes, holes, or slits, respectively. Thus, the damping channel 3 can be a combination of several forms, such as hole and slit structure, hole and hole structure, hole and hole structure, hole and hole structure, and slit and slit structure, forming honeycomb holes or honeycomb cavities on the oil guiding structure 2. When the oil passes through this type of damping channel 3, it can be quickly cut and diverted, thereby achieving a better damping effect.

[0081] In an optional embodiment of the present invention, a receiving cavity 203 may be provided between the first profile 201 and the second profile 202, and multiple first channels 301 are connected to the receiving cavity 203, and multiple second channels 302 are also connected to the receiving cavity 203. Thus, oil introduced through the first channel 301 or the second channel 302 will pass through the receiving cavity 203 between them, thereby enabling the overall damping device to simultaneously possess both damping and dispersion functions.

[0082] In an optional embodiment, one end of the first profile 201 may be provided with a groove, and one end of the second profile 202 may be used to seal the opening of the groove, so that a receiving cavity 203 is formed between the first profile 201 and the second profile 202.

[0083] Specifically, after the second profile 202 is connected to the first profile 201, one end of the second profile 202 seals the opening of the groove, so that one end of the second profile 202 and the groove form a sealed receiving cavity 203.

[0084] In other embodiments, the groove can be provided on the second profile 202, that is, a groove can be machined at one end of the second profile 202. After the first profile 201 and the second profile 202 are connected, one end of the first profile 201 seals the opening of the groove, so that one end of the first profile 201 and the groove form a closed receiving cavity 203.

[0085] This invention provides a damping device for an accumulator. An oil guiding structure 2 is provided at the oil inlet 1 of the accumulator. Multiple damping channels 3 on the oil guiding structure 2 guide oil into or out of the accumulator. During the oil guiding process, the oil impacts the oil guiding structure 2 and is diverted by the multiple damping channels 3, thus damping the impact of the oil. This reduces vibration and dissipates energy as the oil passes through the damping channels 3. Compared to existing mushroom valves, the damping device provided by this invention can reduce vibration and dissipate energy for the incoming and outgoing oil. The overall structure has no moving friction pairs, thus increasing the reliability of the structure. Furthermore, this device has a simple structure and low processing cost.

[0086] The energy storage device provided by the present invention will be described below. The energy storage device described below can be referred to in correspondence with the damping device for the energy storage device or the manufacturing method for the damping device for the energy storage device described above.

[0087] The present invention provides an energy accumulator, which may include an oil inlet 1 and a damping device for the energy accumulator as described in any of the above embodiments, wherein the oil guiding structure 2 of the damping device is disposed in the oil inlet 1.

[0088] The beneficial effects achieved by the energy storage device provided by this invention are consistent with the beneficial effects achieved by the damping device for the energy storage device provided by this invention, so they will not be repeated here.

[0089] The working machinery provided by the present invention is described below. The working machinery described below can be referred to in correspondence with the damping device or accumulator for accumulator described above.

[0090] The present invention provides a working machine that may include a hydraulic system and an accumulator as described above, wherein the accumulator may be mounted on the hydraulic system.

[0091] The beneficial effects achieved by the working machinery provided by this invention are consistent with the beneficial effects achieved by the energy storage device or the damping device for the energy storage device provided by this invention, so they will not be repeated here.

[0092] It should be noted that the aforementioned operating machinery can be excavators, pump trucks, loaders, rotary drilling rigs, or other construction machinery.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a damping device for an energy storage device, characterized in that, The damping device includes a first profile (201) and a second profile (202), and the manufacturing method includes the following steps: Multiple first channels (301) are machined through the first profile (201), and multiple second channels (302) are machined through the second profile (202). A groove is machined at one end of the first profile (201) that contacts the second profile (202) so that after the first profile (201) and the second profile (202) abut against each other, a receiving cavity (203) is formed between the first profile (201) and the second profile (202). The plurality of first channels (301) and the plurality of second channels (302) are all connected to the receiving cavity (203) to have a damping and diverging effect. The first profile (201) and the second profile (202) abut against each other along the axial direction; The overlap between the first channel (301) and the second channel (302) is adjusted according to the preset damping coefficient of the damping device to form a damping channel (3) with the preset damping coefficient, wherein oil can be introduced into or out of the accumulator through multiple damping channels (3); The first profile (201) and the second profile (202) are fixedly connected to form an oil guiding structure (2) for the oil guide port (1) of the accumulator.

2. The method for manufacturing a damping device for an energy storage device according to claim 1, characterized in that, The step of adjusting the overlap between the first channel (301) and the second channel (302) according to the preset damping coefficient of the damping device to form a damping channel (3) with the preset damping coefficient includes: One of the first channel (301) and the second channel (302) is illuminated by a light source, allowing the other channel to transmit light; Obtain the light-transmitting area, and determine the damping coefficient of the damping channel (3) based on the preset relationship between the light-transmitting area and the damping coefficient.

3. The method for manufacturing a damping device for an energy storage device according to claim 1, characterized in that, Multiple channels (301) and channels (302) are processed on the first profile (201) and the second profile (202) respectively by laser cutting.

4. The method for manufacturing a damping device for an energy storage device according to claim 1, characterized in that, The cross-section of the first channel (301) and / or the second channel (302) is a slit structure extending in an arc shape.

5. A damping device for an energy storage device, characterized in that, include: An oil guiding structure (2) is provided at the oil inlet (1) of the accumulator. The oil guiding structure (2) includes a first profile (201) and a second profile (202) connected to each other. Multiple damping channels (3) are used to introduce or export oil into the accumulator and to provide damping effect on the oil. The damping channels (3) include a first channel (301) and a second channel (302) that are connected. The first channel (301) is disposed through the first profile (201), and the second channel (302) is disposed through the second profile (202). A receiving cavity (203) is provided between the first profile (201) and the second profile (202). Multiple first channels (301) are connected to the receiving cavity (203), and multiple second channels (302) are connected to the receiving cavity (203) to provide damping and dispersion effects.

6. The damping device for an energy storage device according to claim 5, characterized in that, The first profile (201) has a groove on one side, and the second profile (202) blocks the opening of the groove on one side, so that the receiving cavity (203) is formed between the first profile (201) and the second profile (202).

7. An energy storage device, characterized in that, include: Oil guide port (1) ； The damping device for an energy storage device as described in claim 5 or 6, wherein the oil guiding structure (2) of the damping device is disposed at the oil guiding port (1).

8. A type of operating machinery, characterized in that, include: Hydraulic system; The accumulator as claimed in claim 7, wherein the accumulator is disposed on the hydraulic system.

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