High performance bellows counter mounted accumulator

Abstract

The utility model provides a kind of high efficiency bellows reverse type energy accumulator, it is related to energy accumulator field;The high efficiency bellows reverse type energy accumulator includes shell, end cap and bellows;Bellows is located in the inner chamber of shell, and the wall surface of one end of bellows is fixedly connected, and end cap is fixed on the other end of bellows;End cap can slide in inner chamber, and the side of end cap away from bellows forms gas chamber with shell, and the inner hole of end cap and bellows forms liquid chamber;And shell is structured with the inflation hole being communicated with gas chamber, and the liquid hole being communicated with liquid chamber.The high efficiency bellows reverse type energy accumulator of the utility model can reduce the risk of bellows expansion deformation.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, specifically to a high-efficiency bellows reverse-mounted energy storage device. Background Technology

[0002] An accumulator is an energy storage device in a hydraulic system. It converts energy in the system into compressible or potential energy at appropriate times and stores it. When the system needs it, it converts the compressible 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 overall system pressure remains normal.

[0003] The existing accumulator structure, as described in Chinese Utility Model Patent Application No. 2023205525316, features a bellows positioned above the piston rings. The inner bore of the bellows forms the gas chamber, while the space below the piston rings forms the liquid chamber. Changes in liquid pressure within the liquid chamber compress the bellows in the gas chamber, thus buffering the changes in liquid pressure within the liquid chamber.

[0004] However, the drawback of existing accumulators is that when pre-filling the gas chamber with gas, the bellows is prone to expansion and deformation due to excessive gas pressure. Utility Model Content

[0005] Therefore, this utility model proposes a high-efficiency bellows reverse-mounted accumulator, which can at least partially solve the technical problem of bellows expansion and deformation caused by high gas pressure in existing accumulators.

[0006] The technical solution of this utility model is as follows: The device includes an outer shell, an end cap, and a bellows. The bellows is disposed within the inner cavity of the outer shell, and one end of the bellows is fixedly connected to the wall of the inner cavity. The end cap is fixedly disposed on the other end of the bellows. The end cap is slidable within the inner cavity, and the side of the end cap facing away from the bellows forms an air chamber with the outer shell. The inner hole of the bellows forms a liquid chamber isolated from the air chamber. The outer shell is provided with an inflation hole communicating with the air chamber and a liquid passage hole communicating with the liquid chamber.

[0007] Furthermore, the bellows is made of metal.

[0008] Furthermore, the inner cavity includes a cylindrical intermediate section, the end cap is disc-shaped and can slide within the intermediate section; the outer diameter of the bellows is smaller than the outer diameter of the end cap.

[0009] Furthermore, the outer casing includes an upper casing and a lower casing that are fixedly connected; the lower casing has a connecting surface that protrudes inward from the inner wall of the upper casing on its end face for fitting with the upper casing, and the end of the bellows away from the end cap is fixedly connected to the connecting surface.

[0010] Furthermore, the end face of the lower housing for fitting with the upper housing includes a first stepped surface, a second stepped surface, and the connecting surface arranged sequentially from the outside to the inside; and the second stepped surface is higher than the first stepped surface, and the connecting surface is higher than the second stepped surface.

[0011] Furthermore, the upper housing and the lower housing are fixedly connected as one unit by welding.

[0012] Furthermore, a limiting ring is provided on the end face of the end cap facing away from the bellows. The diameter of the limiting ring is smaller than the diameter of the end cap, and the limiting ring protrudes from the end face of the end cap. When the end cap slides close to the wall of the inner cavity, the limiting ring contacts the wall of the inner cavity before the end cap.

[0013] Furthermore, along the direction from the outside of the inner cavity to the inside of the inner cavity, the air inlet includes a cylindrical segment and a conical segment connected in series, with the cross-section of the conical segment gradually increasing in the direction away from the cylindrical segment.

[0014] Furthermore, a blind hole is provided at the end of the cylindrical segment away from the conical segment, an internal thread is constructed on the inner wall of the cylindrical segment, and a sealing bolt is screwed into the cylindrical segment.

[0015] The working principle and beneficial effects of this utility model are as follows: The high-efficiency bellows-type inverted accumulator provided by this utility model consists of an air chamber formed by an end cap and a shell, and a liquid chamber formed by an end cap, the inner hole of the bellows, and the shell. When gas is filled into the air chamber, the gas no longer enters the inner hole of the bellows, so the bellows will not expand and deform due to excessive gas pressure. When liquid enters the liquid chamber, the compression of the air chamber by the end cap forms a buffer, thus reducing the risk of the bellows deforming due to excessive liquid pressure. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a cross-sectional view of the high-efficiency bellows reverse-mounted accumulator in operation according to an embodiment of this utility model. Figure 2 This is a cross-sectional view of the high-efficiency bellows reverse accumulator under pre-charge gas according to an embodiment of this utility model. In the diagram: 100, outer shell; 101, inner cavity; 102, air chamber; 103, liquid chamber; 104, air filling hole; 105, liquid passage hole; 106, cylindrical section; 107, conical section; 108, circular hole section; 109, conical hole section; 110, upper shell; 120, lower shell; 121, first step surface; 122, second step surface; 123, connecting surface; 200, end cap; 210, limiting ring; 300, bellows; 400, sealing bolt. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0019] This utility model embodiment provides a high-efficiency bellows-type reversed energy accumulator, see reference. Figure 1 and Figure 2 As shown, the high-efficiency bellows-type inverted accumulator generally includes a housing 100, an end cap 200, and a bellows 300. The bellows 300 is disposed within the inner cavity 101 of the housing 100, with one end of the bellows 300 fixedly connected to the wall of the inner cavity 101. The end cap 200 is fixedly disposed on the other end of the bellows 300 and is slidable within the inner cavity 101. The side of the end cap 200 facing away from the bellows 300 forms an air chamber 102 with the housing 100. The inner bore of the bellows 300 forms a liquid chamber 103 isolated from the air chamber 102. Furthermore, the housing 100 has an inflation port 104 communicating with the air chamber 102 and a liquid passage port 105 communicating with the liquid chamber 103.

[0020] Based on the above overall structure, before use, the high-efficiency bellows-type inverted accumulator of this embodiment is pre-charged with gas at a certain pressure into the gas chamber 102 through the air inlet 104. During use, the liquid inlet 105 is connected to the hydraulic system. When the pressure in the hydraulic system is too high, the pressure can be released to the liquid chamber 103, and the liquid pressure in the liquid chamber 103 is released by compressing the air chamber 102. When the pressure in the hydraulic system decreases, the gas pressure in the air chamber 102 compresses the liquid chamber 103, replenishing the pressure in the hydraulic system, thereby maintaining a stable pressure within the hydraulic system. It should be noted that the overall working principle of the high-efficiency bellows-type inverted accumulator of this embodiment is consistent with that of existing accumulators, and can be referred to in the prior art, which will not be detailed here.

[0021] refer to Figure 1 and Figure 2As shown, the outer shell 100 of this embodiment is generally cylindrical, and the inner cavity 101 of the outer shell 100 also includes a cylindrical intermediate section. The end cap 200 is disc-shaped and can slide within the intermediate section, and the outer peripheral surface of the end cap 200 is in contact with the inner wall surface of the intermediate section. It should be noted that the sliding seal structure between the end cap 200 and the inner wall of the intermediate section can refer to the prior art, and will not be described in detail here.

[0022] In this embodiment, reference Figure 1 and Figure 2 As shown, the outer diameter of the bellows 300 is smaller than the outer diameter of the end cap 200. By making the outer diameter of the bellows 300 smaller than the outer diameter of the end cap 200, the bellows 300 will not collide with the wall of the inner cavity 101 when the end cap 200 slides in the middle section, thereby extending the service life of the high-efficiency bellows reverse accumulator.

[0023] refer to Figure 1 and Figure 2 As shown, in this embodiment, the outer shell 100 specifically includes an upper shell 110 and a lower shell 120 that are fixedly connected; wherein, the lower shell 120 has a connecting surface 123 that protrudes inward from the inner wall surface of the upper shell 110 on the end face for fitting with the upper shell 110, and the end of the aforementioned bellows 300 away from the end cap 200 is specifically fixedly connected to the connecting surface 123.

[0024] In this embodiment, the assembly of the high-efficiency bellows-type inverted accumulator is facilitated by using an upper shell 110 and a lower shell 120 as the housing. Specifically, during assembly, the end face of one end of the bellows 300 can be pre-welded to the connecting surface 123, and then the upper shell 110 and the lower shell 120 can be butt-jointed and welded together to complete the assembly of the high-efficiency bellows-type inverted accumulator.

[0025] refer to Figure 1 As shown in the figure, in this embodiment, the end face of the lower housing 120 for fitting with the upper housing 110 includes a first stepped surface 121, a second stepped surface 122, and a connecting surface 123 arranged sequentially from the outside to the inside; and the second stepped surface 122 is higher than the first stepped surface 121, and the connecting surface 123 is higher than the second stepped surface 122. By setting the first stepped surface 121, the second stepped surface 122, and the connecting surface 123 at unequal heights, the influence of the weld between the connecting surface 123 and the bellows 300 on the mating surface between the upper housing 110 and the lower housing 120 can be avoided.

[0026] In this embodiment, the upper housing 110 and the lower housing 120 are fixed together by welding. In some embodiments, the upper housing 110 and the lower housing 120 may also be fixed together by bolts or other means.

[0027] refer to Figure 1 and Figure 2 As shown, in this embodiment, a limiting ring 210 is provided on the end face of the end cap 200 that is away from the bellows 300. The diameter of the limiting ring 210 is smaller than the diameter of the end cap 200, and the limiting ring 210 protrudes from the end face of the end cap 200. When the end cap 200 slides close to the wall of the inner cavity 101, the limiting ring 210 contacts the wall of the inner cavity 101 before the end cap 200.

[0028] In simple terms, when the pressure inside the liquid chamber 103 abnormally increases, pushing the end cap 200 to slide away from the liquid chamber 103 and colliding with the inner wall of the outer shell 100, the limiting ring 210 will collide with the wall of the inner cavity 101 instead of the end plate. If the limiting ring 210 is not provided, the end cap 200 will collide with the inner wall of the outer shell 100, and the end cap 200 may deform due to the collision, posing a risk of leakage from the air chamber 102. In this embodiment, by providing the limiting ring 210, the risk of leakage from the air chamber 102 caused by the deformation of the end cap 200 can be reduced.

[0029] refer to Figure 1 As shown, in this embodiment, along the direction from the outside of the inner cavity 101 to the inside of the inner cavity 101, the aforementioned air inlet 104 includes a cylindrical section 106 and a conical section 107 connected in series. The cross-section of the conical section 107 gradually increases in the direction away from the cylindrical section 106. By providing this conical section 107, the airflow of the high-efficiency bellows-type inverted accumulator can be made smoother during charging or backpressure.

[0030] refer to Figure 1 and Figure 2 As shown, in this embodiment, a blind hole is connected in series at the end of the cylindrical section 106 away from the conical section 107. An internal thread is constructed on the inner wall of the cylindrical section 106, and a sealing bolt 400 is screwed into the cylindrical section 106. By removing the sealing bolt 400 from the inflation hole 104, gas can be injected into the gas chamber 102, or gas can be released from the gas chamber 102. When the sealing bolt 400 is installed in the inflation hole 104, the gas pressure inside the gas chamber 102 can be maintained.

[0031] In this embodiment, reference Figure 2 As shown, along the direction from the outside of the inner cavity 101 to the inside of the inner cavity 101, the aforementioned liquid passage 105 includes a series of circular hole sections 108 and conical hole sections 109, wherein the cross-section of the conical hole section 109 gradually increases in the direction away from the circular hole section 108. By providing this conical hole section 109, the flow of liquid in the high-efficiency bellows inverted accumulator can be made smoother during liquid filling or liquid return.

[0032] In this embodiment, the bellows 300 is preferably made of metal. One end of the bellows 300 is welded to the lower housing 120, and the other end of the bellows 300 is welded to the end cap 200. By using metal for the bellows 300, the bellows 300 can have high strength and a long service life.

[0033] The specific working process of the high-efficiency bellows reverse-type energy accumulator in this embodiment is as follows: Figure 1 As shown, before the accumulator operates, a certain amount of air is pre-filled into the air chamber 102, and the end cap 200 compresses the bellows 300 under air pressure. Figure 2 As shown, when the accumulator is working, the liquid pressure in the external hydraulic system enters the bellows 300, pushing the end cover 200 to move upward. As the pressure in the hydraulic system changes, the size of the air chamber 102 also changes, thereby providing a buffer for the changes in liquid pressure in the hydraulic system.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high performance bellows inverted accumulator characterized by: The device includes a housing (100), an end cap (200), and a bellows (300). The bellows (300) is disposed in the inner cavity (101) of the housing (100), and one end of the bellows (300) is fixedly connected to the wall of the inner cavity (101). The end cap (200) is fixedly disposed on the other end of the bellows (300). The end cap (200) is slidable in the inner cavity (101), and the side of the end cap (200) away from the bellows (300) and the housing (100) form an air chamber (102). The inner hole of the bellows (300) forms a liquid chamber (103) isolated from the air chamber (102). The housing (100) is provided with an air inlet (104) communicating with the air chamber (102) and a liquid outlet (105) communicating with the liquid chamber (103).

2. The high performance bellowed reverse mounted accumulator of claim 1 wherein, The corrugated pipe (300) is made of metal.

3. The high performance bellowed reverse mounted accumulator of claim 1 wherein, The inner cavity (101) includes a cylindrical middle section, and the end cap (200) is disc-shaped and can slide within the middle section; the outer diameter of the bellows (300) is smaller than the outer diameter of the end cap (200).

4. The high performance bellowed reverse mounted accumulator of claim 1 wherein, The outer casing (100) includes an upper casing (110) and a lower casing (120) fixedly connected; the lower casing (120) has a connecting surface (123) on its end face for fitting with the upper casing (110) that protrudes inwardly from the inner wall surface of the upper casing (110), and one end of the bellows (300) away from the end cap (200) is fixedly connected to the connecting surface (123).

5. The high performance bellowed reverse mounted accumulator of claim 4 wherein, The end face of the lower housing (120) for fitting with the upper housing (110) includes a first step surface (121), a second step surface (122) and a connecting surface (123) arranged sequentially from the outside to the inside; and the second step surface (122) is higher than the first step surface (121), and the connecting surface (123) is higher than the second step surface (122).

6. The high performance bellowed reverse mounted accumulator of claim 4 wherein, The upper shell (110) and the lower shell (120) are fixedly connected as one unit by welding.

7. The high performance bellowed reverse mounted accumulator of claim 1 wherein, A limiting ring (210) is provided on the end face of the end cap (200) facing away from the bellows (300). The diameter of the limiting ring (210) is smaller than the diameter of the end cap (200), and the limiting ring (210) protrudes from the end face of the end cap (200). When the end cap (200) slides close to the wall of the inner cavity (101), the limiting ring (210) contacts the wall of the inner cavity (101) before the end cap (200).

8. The high performance bellowed reverse mounted accumulator of claim 1 wherein, Along the direction from the outside of the inner cavity (101) to the inside of the inner cavity (101), the air inlet (104) includes a cylindrical segment (106) and a conical segment (107) connected in series, with the cross section of the conical segment (107) gradually increasing in the direction away from the cylindrical segment (106).

9. The high performance bellowed reverse mounted accumulator of claim 8 wherein, A blind hole is provided at the end of the cylindrical section (106) away from the conical section (107), an internal thread is constructed on the inner wall of the cylindrical section (106), and a sealing bolt (400) is screwed into the cylindrical section (106).

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