Fastening and sealing structure of hydraulic energy accumulator

Abstract

The invention relates to the field of energy accumulators, and discloses a hydraulic energy accumulator fastening and sealing structure which comprises a shell, a cylinder cover is arranged at the top of the shell, a gas conveying pipe is fixedly connected to the middle of the cylinder cover, an oil conveying pipe is fixedly connected to the bottom of the shell, a piston is installed in the shell, and a first annular groove is formed in the middle of the piston; a first annular groove is formed in the piston, a sealing structure is arranged in the first annular groove of the piston, first D-shaped sealing rings are symmetrically arranged on the outer wall of the piston, arc-shaped baffle rings are symmetrically arranged on one sides of the first D-shaped sealing rings, and sliding discs are symmetrically connected to one side of the piston in a sliding mode. The sliding disc slides on the piston, so that the first spring and the second spring are compressed, partial energy storage operation is conducted, the pushing structure is driven to operate, the first D-shaped sealing ring is pushed, the contact stress of the arc-shaped edge of the first D-shaped sealing ring and the inner wall of the shell is increased along with rising of oil pressure, and dynamic sealing compensation is formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy accumulators, in particular to a hydraulic accumulator fastening and sealing structure. BACKGROUND

[0002] As a core component for storing and releasing hydraulic energy in hydraulic systems, hydraulic accumulators are widely used in engineering machinery, aerospace, deep-sea equipment and other fields. The reliability of the sealing structure directly affects the energy efficiency and operational stability of the system. Under high pressure conditions, if the seal fails, it will cause oil and gas mixing, energy leakage, and even equipment failure.

[0003] In traditional hydraulic accumulators, the sealing structure is mainly dependent on the initial pre-tightening force and the self-tightening effect of the system pressure. When the piston movement speed exceeds 0.5m / s, the dynamic friction between the sealing ring and the cylinder will cause contact stress fluctuations, especially during the transition from low pressure to high pressure, which is prone to instantaneous leakage, resulting in pressure fluctuations in the hydraulic system and affecting the smoothness of the actuator. SUMMARY

[0004] To overcome the shortcomings of the prior art, the present application provides a hydraulic accumulator fastening and sealing structure, which solves the problem of instantaneous leakage caused by the dependence on the initial pre-tightening force and the self-tightening effect of the system pressure in traditional hydraulic accumulators, which leads to pressure fluctuations in the hydraulic system and affects the smoothness of the actuator.

[0005] To achieve the above purpose, the present application realizes the following technical scheme: a hydraulic accumulator fastening and sealing structure, comprising a shell, a cylinder cover is arranged at the top of the shell, a gas delivery pipe is fixedly connected to the middle of the cylinder cover, an oil delivery pipe is fixedly connected to the bottom of the shell, a piston is installed inside the shell, a first annular groove is formed in the middle of the piston, a sealing structure is arranged in the first annular groove of the piston, a first D-shaped sealing ring is symmetrically arranged on the outer wall of the piston, an arc-shaped stop ring is symmetrically arranged on one side of the first D-shaped sealing ring, a sliding disc is symmetrically connected to one side of the piston, a first spring is fixedly connected to the opposite side of the sliding disc, a moving disc is fixedly connected to one side of the first spring, a second spring is fixedly connected to the bottom of the moving disc, one side of the second spring is fixedly connected to one side of the piston, an extension guide column is arranged in the middle of the moving disc, and a pushing structure is uniformly fixedly connected to the circumferential outer wall of the moving disc.

[0006] By adopting the above technical solution, the sliding disk is utilized to slide on the piston, so that the first spring and the second spring are compressed, and partial energy storage operation is performed, which drives the pushing structure to operate and push the first D-type sealing ring. As a result, the contact stress between the arc-shaped edge of the first D-type sealing ring and the inner wall of the shell increases with the increase of oil pressure, forming dynamic sealing compensation, thereby enhancing the sealing performance of the piston during movement. As a result, when the piston moves, the sliding disk compresses the first spring to drive the moving disk to move, and the pushing structure squeezes the first D-type sealing ring in real time, so that it fits tightly with the arc-shaped retaining ring, suppressing contact stress fluctuations caused by high-speed movement of the piston or pressure switching, and solving the problem that in traditional hydraulic accumulators, the self-tightening effect mainly relies on the initial preload and the system pressure, which is prone to instantaneous leakage, causing pressure fluctuations in the hydraulic system and affecting the smoothness of the actuator action.

[0007] Preferably, a first sliding groove is symmetrically opened on one side of the piston, the outer wall of the sliding disk is slidably connected in the first sliding groove of the piston, and a third sealing ring is installed on the circumferential outer wall of the sliding disk.

[0008] Preferably, the outer wall of the piston is symmetrically provided with a second annular groove, the first D-shaped sealing ring and the arc-shaped retaining ring are both located in the second annular groove of the piston, and one side of the telescopic guide column is installed on the inner wall of the piston.

[0009] Preferably, bolts are evenly installed on one side of the cylinder cover, one side of the bolts is threadedly connected to the top of the housing, and second sliding grooves are evenly opened in the first sliding groove of the piston, and the second sliding grooves are connected to the second annular groove.

[0010] Preferably, a third annular groove is symmetrically provided in the second sliding groove of the piston, and a fourth sealing ring is installed in the third annular groove of the piston.

[0011] Preferably, the sealing structure includes a first sealing ring, a second D-shaped sealing ring is installed on the inner wall of the first sealing ring, and a second sealing ring is symmetrically installed on the outer wall of the first sealing ring. The first sealing ring, the second sealing ring and the second D-shaped sealing ring are all located in the first annular groove of the piston.

[0012] Preferably, the pushing structure includes an arc-shaped push plate, one side of the arc-shaped push plate is slidably connected to the second annular groove of the piston, and one side of the arc-shaped push plate is fixedly connected to a second connecting column.

[0013] Preferably, the outer wall of the second connecting column is slidably connected to the second sliding groove of the piston, and the end of the second connecting column away from the arc-shaped push plate is symmetrically fixedly connected to the third lug, and the side opposite to the third lug is fixedly connected to the second rotating shaft.

[0014] Preferably, the outer wall of the second rotating shaft is rotationally connected with a fourth lug, one side of the fourth lug is fixedly connected with a first connecting column, and one end of the first connecting column away from the fourth lug is fixedly connected with a second lug.

[0015] Preferably, one side of the second lug is rotationally connected with a first rotating shaft, both ends of the first rotating shaft are fixedly connected with first lugs, and one side of the first lug is fixedly connected to the circumferential outer wall of the moving disc.

[0016] Working principle: when the oil enters the oil cavity for energy storage, the pressure of the oil on the piston is utilized to drive the piston to move in the shell, and the sliding disc in the oil cavity slides on the piston, thereby compressing the first spring and performing partial energy storage operation, at the same time, the first spring is compressed to drive the moving disc to move, and the telescopic guide column is compressed to guide the second spring to be compressed, thereby performing partial energy storage operation again, and when the moving disc moves, the first lug and the first rotating shaft move, one end of the first connecting column rotates around the second rotating shaft, the second connecting column slides in the second sliding groove of the piston, and the arc-shaped push plate slides in the second annular groove of the piston, so that the axial displacement of the moving disc is converted into the radial movement of the arc-shaped push plate, thereby extruding the first D-shaped sealing ring in the second annular groove, the contact stress between the arc-shaped side of the first D-shaped sealing ring and the inner wall of the shell increases with the increase of oil pressure, dynamic sealing compensation is formed, and the sealing property of the piston during movement is enhanced, and when the oil needs to be discharged from the shell, the gas is sent into the gas cavity in the shell through the gas conveying pipe, the piston is driven to move by the pressure of the gas, and the sliding disc in the gas cavity slides on the piston, so that the first spring in the gas cavity and the telescopic guide column are compressed to store elastic potential energy, buffer the impact of the piston movement, and drive the push structure to operate to extrude the first D-shaped sealing ring in the gas cavity, thereby enhancing the sealing property of the piston, and realizing self-adaptive adjustment of the sealing force with the system pressure, and effectively improving the sealing reliability under high pressure working conditions.

[0017] The application provides a hydraulic accumulator fastening sealing structure. 1. The application compresses the first spring and the second spring to perform partial energy storage operation by using the sliding disc to slide on the piston, drives the pushing structure to operate, pushes the first D-shaped sealing ring, increases the contact stress between the arc-shaped edge of the first D-shaped sealing ring and the inner wall of the shell with the increase of oil pressure, forms dynamic sealing compensation, thereby enhancing the sealing performance of the piston when moving, and realizes that the sliding disc compresses the first spring to drive the moving disc to displace when the piston moves, and the first D-shaped sealing ring is squeezed in real time by the pushing structure to tightly adhere to the arc-shaped blocking ring, thereby inhibiting the contact stress fluctuation caused by high-speed movement or pressure switching of the piston, solving the problem that in the traditional hydraulic accumulator, the initial pre-tightening force and the self-tightening effect of the system pressure are mainly relied on, and the instantaneous leakage easily occurs, thereby causing the pressure fluctuation of the hydraulic system and affecting the stability of the action of the execution element.

[0018] 2. The application adopts the sealing structure composed of the first sealing ring, the second D-shaped sealing ring and the second sealing ring in the middle of the piston, the first sealing ring provides basic pre-tightening sealing, the second D-shaped sealing ring realizes pressure self-tightening by using the arc-shaped surface, and the second sealing ring enhances lateral sealing, so that the three sealing elements cooperatively form a three-dimensional sealing barrier to block the medium mixing between the oil cavity and the gas cavity, thereby ensuring the long-term stable operation of the accumulator.

[0019] 3. The application drives one end of the first connecting column to rotate around the second rotating shaft by the movement of the moving disc, makes the second connecting column slide in the second sliding groove of the piston, and further drives the arc-shaped push plate to slide in the second annular groove of the piston, so that the axial displacement of the moving disc is converted into the radial movement of the arc-shaped push plate, thereby extruding the first D-shaped sealing ring in the second annular groove, making the first D-shaped sealing ring adhere to the arc-shaped blocking ring more tightly, and limiting and protecting the first D-shaped sealing ring through the arc-shaped blocking ring to enhance the service life of the first D-shaped sealing ring, and prevent the first D-shaped sealing ring from being taken out of the first annular groove of the piston, thereby improving the sealing performance of the piston.

[0020] 4. The application provides the initial thrust through the first spring, absorbs the high-frequency vibration through the second spring, cooperatively reduces the pressure fluctuation in the system operation, and synchronously compresses the energy storage when the piston moves, thereby not only assisting the energy storage of the accumulator, but also reducing the impact vibration of the piston movement through the buffering effect of the spring force, indirectly improving the working stability of the sealing element, and reducing the risk of sealing failure caused by impact. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional structure schematic diagram of the application; Figure 2 It is a shell internal structure schematic diagram of the application; Figure 3 It is a sliding disc local structure schematic diagram of the application; Figure 4It is a schematic diagram of the internal structure of the piston of the application; Figure 5 It is a schematic diagram of the partial structure of the moving disc of the application; Figure 6 It is a schematic diagram of the partial structure of the piston of the application; Figure 7 It is a schematic diagram of the partial structure of the second sliding groove of the application; Figure 8 It is a schematic diagram of the partial structure of the arc-shaped push plate of the application; Figure 9 It is a schematic diagram of the partial structure of the first D-shaped sealing ring of the application; Figure 10 It is a schematic diagram of the partial structure of the first sealing ring of the application.

[0022] 1, housing; 2, cylinder cover; 3, gas conveying pipe; 4, bolt; 5, oil conveying pipe; 6, piston; 7, sliding disc; 8, first sealing ring; 9, first D-shaped sealing ring; 10, arc-shaped blocking ring; 11, second sealing ring; 12, third sealing ring; 13, first spring; 14, moving disc; 15, first lug; 16, second lug; 17, first connecting column; 18, second connecting column; 19, arc-shaped push plate; 20, fourth sealing ring; 21, telescopic guide column; 22, second spring; 23, second D-shaped sealing ring; 24, third lug; 25, third annular groove; 26, fourth lug; 27, second rotating shaft; 28, first rotating shaft; 29, first sliding groove; 30, first annular groove; 31, second annular groove; 32, second sliding groove. DETAILED DESCRIPTION

[0023] The technical solutions of the application will be described clearly and completely below in combination with the drawings of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0024] Please refer to the drawings of the application Figure 1 - the drawings of the application Figure 10The embodiment of the present application provides a hydraulic accumulator fastening sealing structure, which comprises a shell 1, the top of the shell 1 is provided with a cylinder cover 2, the middle part of the cylinder cover 2 is fixedly connected with a gas conveying pipe 3, the bottom of the shell 1 is fixedly connected with an oil conveying pipe 5, the inside of the shell 1 is installed with a piston 6, the middle part of the piston 6 is provided with a first annular groove 30, the first annular groove 30 of the piston 6 is provided with a sealing structure, the outer wall of the piston 6 is symmetrically provided with a first D-shaped sealing ring 9, one side of the first D-shaped sealing ring 9 is symmetrically provided with an arc-shaped blocking ring 10, one side of the piston 6 is symmetrically slidably connected with a sliding disc 7, the opposite side of the sliding disc 7 is fixedly connected with a first spring 13, one side of the first spring 13 is fixedly connected with a moving disc 14, the bottom of the moving disc 14 is fixedly connected with a second spring 22, one side of the second spring 22 is fixedly connected with one side of the piston 6, the middle part of the moving disc 14 is provided with an extension guide column 21, and the circumferential outer wall of the moving disc 14 is uniformly fixedly connected with a pushing structure.

[0025] Specifically, the shell 1 is made of high-strength alloy forged steel, the inner wall is precisely ground, and the surface roughness is controlled to be Ra≤0.8 μm, so as to ensure the sealing precision when cooperating with the piston 6; the cylinder cover 2 is installed on the shell 1 to form a closed accumulator shell; the piston 6 is forged by 42CrMo alloy, the outer circular surface is quenched and treated, and is plated with a hard chromium layer, so as to improve the wear resistance; the shell 1 is divided into an upper gas cavity and a lower oil cavity by the installation of the piston 6; the gas conveying pipe 3 in the middle part of the cylinder cover 2 is connected in a threaded connection mode, and a metal winding pad is arranged at the joint to prevent high-pressure gas leakage; the connection between the oil conveying pipe 5 and the bottom of the shell adopts a welded flange to ensure the pressure resistance of the oil passage; the gas conveying pipe 3 is arranged to send gas into the gas cavity in the shell 1 through the gas conveying pipe 3; and the oil conveying pipe 5 is arranged to enable oil to enter and exit the oil cavity of the shell 1.

[0026] The sealing structure is sleeved on the middle part of the piston 6 by the first annular groove 30, so as to seal between the piston 6 and the shell 1, prevent oil and gas from mixing, and ensure stable energy storage; the vertical edge of the first D-shaped sealing ring 9 is embedded in the groove of the first annular groove 30, the arc-shaped blocking rings 10 on the two sides are made of copper alloy, the inner arc surface is matched with the arc-shaped edge of the sealing ring, and the outer side is fixed with the groove wall of the first annular groove 30 to prevent the sealing ring from being extruded under high pressure; the surface of the arc-shaped blocking ring 10 is phosphorized to reduce the friction coefficient with the sealing ring; the two first D-shaped sealing rings 9 are sleeved on the piston 6 respectively, so that when the piston 6 moves, the arc-shaped surface of the first D-shaped sealing ring 9 is extruded against the inner wall of the shell 1, thereby further improving the sealing property of the piston 6; the two arc-shaped blocking rings 10 on one side of the first D-shaped sealing ring 9 are used to limit the first D-shaped sealing ring 9, so as to protect the first D-shaped sealing ring 9 to a certain extent when the piston 6 drives the first D-shaped sealing ring 9 to move, thereby enhancing the service life of the first D-shaped sealing ring 9 and preventing the first D-shaped sealing ring 9 from coming out of the first annular groove 30 of the piston 6.

[0027] The telescopic guide column 21 is composed of a guide sleeve and a piston rod. The gap between the inner hole of the guide sleeve and the piston rod is ≤0.05mm. The surface is coated with a molybdenum disulfide lubricating layer to ensure the smooth axial movement of the movable plate. The two sliding plates 7 sliding on one side of the piston 6 are respectively located in the air chamber and the oil chamber in the housing 1. When the oil enters the oil chamber for energy storage, the pressure of the oil on the piston 6 is used to drive the piston 6 to move in the housing 1, and the sliding plate 7 in the oil chamber slides on the piston 6, thereby compressing the first spring 13 to perform partial energy storage operation. At the same time, after the first spring 13 is compressed, it drives the movable plate 14 to move, and uses the compression of the telescopic guide column 21 for guidance, so that the second spring 22 is compressed, thereby performing partial energy storage operation again. When the movable plate 14 moves, it drives the pushing structure to operate, pushing the first D-type sealing ring 9, so that the contact stress between the arc edge of the first D-type sealing ring 9 and the inner wall of the housing 1 increases with the increase of oil pressure, forming a dynamic Dynamic sealing compensation is achieved, thereby enhancing the sealing performance of the piston 6 when it moves. When the oil needs to be discharged from the housing 1, gas is sent into the air cavity of the housing 1 through the air supply pipe 3, and the pressure of the gas is used to drive the piston 6 to move, and the sliding disk 7 in the air cavity slides on the piston 6, so that the first spring 13 and the telescopic guide column 21 in the air cavity are compressed, storing elastic potential energy, buffering the impact of the piston movement, and making the pushing structure run, squeezing the first D-shaped sealing ring 9 in the air cavity, and enhancing the sealing performance of the piston 6, thereby realizing adaptive adjustment of the sealing force with the system pressure, effectively improving the sealing reliability under high-pressure working conditions, and at the same time, through the cooperation of multi-layer seals and retaining rings, the service life of the seals is extended, the maintenance requirements are reduced, and the problem of traditional hydraulic accumulators mainly relying on the self-tightening effect of the initial preload and the system pressure, which is prone to instantaneous leakage, causing pressure fluctuations in the hydraulic system and affecting the smoothness of the action of the actuator is solved.

[0028] Please see the attached Figure 2 -Attached Figure 4 , Attachment Figure 6 , Attachment Figure 7 A first sliding groove 29 is symmetrically formed on one side of the piston 6. The outer wall of the sliding plate 7 is slidably connected to the first sliding groove 29 of the piston 6. A third sealing ring 12 is installed on the circumferential outer wall of the sliding plate 7. A second annular groove 31 is symmetrically formed on the outer wall of the piston 6. The first D-shaped sealing ring 9 and the arc-shaped retaining ring 10 are both located in the second annular groove 31 of the piston 6. One side of the telescopic guide column 21 is installed on the inner wall of the piston 6.

[0029] Specific, through the first sliding groove 29 set up on one side of the piston 6, the sliding disc 7 on the piston 6 sliding, sliding disc 7 is made of wear-resistant cast iron, the outer wall is provided with annular groove, the third sealing ring 12 is embedded in the groove, its cross section is lip structure, the material is selected polyurethane, the lip edge towards the sliding groove opening direction, when the sliding disc 7 moves in the sliding groove, the lip edge and the sliding groove wall closely, forming dynamic sealing, effectively prevent oil from the gap between the sliding disc 7 and the piston 6 into, through the second annular groove 31, so that the first D type sealing ring 9, arc baffle ring 10 is convenient to set on the piston 6, through the telescopic guide column 21 on one side of the piston 6, so as to guide the moving disc 14.

[0030] Please refer to the attached Figure 4 , attached Figure 6 , attached Figure 7 , the cylinder cover 2 is uniformly provided with a bolt 4 on one side, the bolt 4 is threadedly connected to the top of the shell 1, the first sliding groove 29 of the piston 6 is uniformly provided with a second sliding groove 32, and the second sliding groove 32 is in communication with the second annular groove 31. The second sliding groove 32 of the piston 6 is symmetrically provided with a third annular groove 25, and the fourth sealing ring 20 is installed in the third annular groove 25 of the piston 6.

[0031] Specifically, the cylinder cover 2 on the top of the shell 1 is connected with the flange of the shell 1 through the uniformly distributed high-strength bolts 4, the flange sealing surface is designed as a concave-convex surface, and a fluorine rubber O-ring is embedded in the flange sealing surface. Under the action of the bolt pre-tightening force, an initial sealing barrier is formed. Through the opening of the second sliding groove 32 and the communication with the second annular groove 31, the operation of the pushing structure is facilitated, so that the pushing structure can push the first D type sealing ring 9 in the second annular groove 31, so that the first D type sealing ring 9 and the arc baffle ring 10 are more closely attached. Through the opening of the third annular groove 25, the fourth sealing ring 20 is conveniently installed, and then the fourth sealing ring 20 is used to seal the pushing structure, so as to prevent the oil and gas in the oil cavity and the gas cavity from hindering the operation.

[0032] Please refer to the attached Figure 3 , attached Figure 4 , attached Figure 10 The sealing structure comprises a first sealing ring 8, a second D type sealing ring 23 is installed on the inner wall of the first sealing ring 8, and a second sealing ring 11 is symmetrically installed on the outer wall of the first sealing ring 8. The first sealing ring 8, the second sealing ring 11 and the second D type sealing ring 23 are located in the first annular groove 30 of the piston 6.

[0033] Specifically, by opening the first annular groove 30, the first sealing ring 8 is conveniently sleeved on the middle part of the piston 6, and after installation, it is elastically deformed under extrusion, is attached to the groove bottom and the groove wall, forms a basic seal, seals the piston 6, the first sealing ring 8 is made of butyronitrile rubber material, is embedded in the groove bottom of the first annular groove 30 to provide a basic seal, the second sealing ring 11 is of a lip structure, is installed outside the first sealing ring to form a double-seal barrier, two second sealing rings 11 are sleeved on the outer wall of the first sealing ring 8, and the second D-shaped sealing ring 23 is nested on the inner wall of the first sealing ring 8, so that the three layers of sealing members are cooperated with each other, the first sealing ring 8 provides initial pre-tightening sealing, the second D-shaped sealing ring 23 realizes pressure self-tightening, and the second sealing ring 11 enhances lateral sealing, effectively blocks the medium mixing of the oil cavity and the gas cavity, and guarantees stable operation of the accumulator, and further enhances the sealing of the piston 6.

[0034] Please refer to the accompanying drawings Figure 4 , the accompanying drawings Figure 5 , the accompanying drawings Figure 8 , the pushing structure comprises an arc-shaped push plate 19, one side of the arc-shaped push plate 19 is slidably connected in the second annular groove 31 of the piston 6, and the arc-shaped push plate 19 is fixedly connected with the second connecting column 18 on one side. The outer wall of the second connecting column 18 is slidably connected in the second sliding groove 32 of the piston 6, and the second connecting column 18 is fixedly connected with the third lug 24 on the side away from the arc-shaped push plate 19. The second connecting column 18 is fixedly connected with the second rotating shaft 27 on the side opposite to the third lug 24. The outer wall of the second rotating shaft 27 is rotatably connected with the fourth lug 26, the first connecting column 17 is fixedly connected with the fourth lug 26 on one side, and the second lug 16 is fixedly connected with the first connecting column 17 on the side away from the fourth lug 26. The first rotating shaft 28 is rotatably connected with the second lug 16 on one side, and the first lug 15 is fixedly connected with the first rotating shaft 28 on both ends. The first lug 15 is fixedly connected to the circumferential outer wall of the moving disc 14 on one side.

[0035] Specifically, through the movement of the moving disc 14, the first lug 15 moves with the first rotating shaft 28, the second lug 16 is rotationally connected with the first rotating shaft 28, the first connecting column 17 is hingedly connected with the moving disc 14, thus through the movement of the moving disc 14, one end of the first connecting column 17 moves up and down, the second connecting column 18 slides in the second sliding groove 32 of the piston 6, thus the second connecting column 18 is limited and guided by the second sliding groove 32, the fourth lug 26 is rotationally connected with the second rotating shaft 27, thus the other end of the first connecting column 17 is hingedly connected with one end of the second connecting column 18, when the moving disc 14 moves, one end of the first connecting column 17 rotates around the second rotating shaft 27, thus through the movement of the first connecting column 17, the second connecting column 18 slides in the second sliding groove 32 of the piston 6, thus the arc-shaped push plate 19 slides in the second annular groove 31 of the piston 6, the axial displacement of the moving disc 14 is converted into the radial movement of the arc-shaped push plate 19, thus the first D-shaped sealing ring 9 in the second annular groove 31 is extruded, thus the first D-shaped sealing ring 9 is more closely attached to the arc-shaped blocking ring 10, the sealing property of the piston 6 is improved, when the second connecting column 18 slides in the second sliding groove 32, the fourth sealing ring 20 is in close contact with the outer wall of the second connecting column 18, thus the medium in the oil cavity or the air cavity is prevented from leaking through the sliding groove gap, thus the normal operation of the pushing structure is ensured.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments can be substantially changed without departing from the spirit and the scope of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A hydraulic accumulator fastening and sealing structure, comprising a housing (1), characterized in that: The top of the housing (1) is provided with a cylinder head (2), the middle of the cylinder head (2) is fixedly connected to an air delivery pipe (3), the bottom of the housing (1) is fixedly connected to an oil delivery pipe (5), a piston (6) is installed inside the housing (1), a first annular groove (30) is provided in the middle of the piston (6), a sealing structure is provided in the first annular groove (30) of the piston (6), a first D-shaped sealing ring (9) is symmetrically provided on the outer wall of the piston (6), and an arc-shaped retaining ring (1) is symmetrically provided on one side of the first D-shaped sealing ring (9). 0), one side of the piston (6) is symmetrically slidably connected to a sliding disk (7), the opposite side of the sliding disk (7) is fixedly connected to a first spring (13), one side of the first spring (13) is fixedly connected to a moving disk (14), the bottom of the moving disk (14) is fixedly connected to a second spring (22), one side of the second spring (22) is fixedly connected to one side of the piston (6), a telescopic guide column (21) is provided in the middle of the moving disk (14), and the circumferential outer wall of the moving disk (14) is evenly fixedly connected to a pushing structure.

2. The hydraulic accumulator fastening and sealing structure according to claim 1, characterized in that: A first sliding groove (29) is symmetrically provided on one side of the piston (6), the outer wall of the sliding disk (7) is slidably connected in the first sliding groove (29) of the piston (6), and a third sealing ring (12) is installed on the circumferential outer wall of the sliding disk (7).

3. The hydraulic accumulator fastening and sealing structure according to claim 1, characterized in that: The outer wall of the piston (6) is symmetrically provided with a second annular groove (31), the first D-shaped sealing ring (9) and the arc-shaped retaining ring (10) are both located in the second annular groove (31) of the piston (6), and one side of the telescopic guide column (21) is mounted on the inner wall of the piston (6).

4. The hydraulic accumulator fastening and sealing structure according to claim 1, characterized in that: Bolts (4) are evenly installed on one side of the cylinder cover (2), and one side of the bolts (4) is threadedly connected to the top of the housing (1). Second sliding grooves (32) are evenly opened in the first sliding groove (29) of the piston (6), and the second sliding grooves (32) are connected to the second annular groove (31).

5. The hydraulic accumulator fastening and sealing structure according to claim 4, characterized in that: A third annular groove (25) is symmetrically formed in the second sliding groove (32) of the piston (6), and a fourth sealing ring (20) is installed in the third annular groove (25) of the piston (6).

6. The hydraulic accumulator fastening and sealing structure according to claim 1, characterized in that: The sealing structure comprises a first sealing ring (8), a second D-shaped sealing ring (23) is mounted on the inner wall of the first sealing ring (8), a second sealing ring (11) is symmetrically mounted on the outer wall of the first sealing ring (8), and the first sealing ring (8), the second sealing ring (11), and the second D-shaped sealing ring (23) are all located in a first annular groove (30) of the piston (6).

7. The hydraulic accumulator fastening and sealing structure according to claim 1, characterized in that: The pushing structure comprises an arc-shaped push plate (19), one side of which is slidably connected to the second annular groove (31) of the piston (6), and one side of which is fixedly connected to a second connecting column (18).

8. The hydraulic accumulator fastening and sealing structure according to claim 7, characterized in that: The outer wall of the second connecting column (18) is slidably connected to the second sliding groove (32) of the piston (6), and the end of the second connecting column (18) away from the arc-shaped push plate (19) is symmetrically fixedly connected to the third lug (24), and the side opposite to the third lug (24) is fixedly connected to the second rotating shaft (27).

9. The hydraulic accumulator fastening and sealing structure according to claim 8, characterized in that: The outer wall of the second rotating shaft (27) is rotatably connected to a fourth lug (26), one side of the fourth lug (26) is fixedly connected to a first connecting column (17), and one end of the first connecting column (17) away from the fourth lug (26) is fixedly connected to the second lug (16).

10. The hydraulic accumulator fastening and sealing structure according to claim 9, characterized in that: One side of the second lug (16) is rotatably connected to the first rotating shaft (28), both ends of the first rotating shaft (28) are fixedly connected to the first lug (15), and one side of the first lug (15) is fixedly connected to the circumferential outer wall of the movable disk (14).

Images