An impact-resistant piston hydraulic accumulator

Abstract

The utility model relates to the technical field of energy accumulator, disclose a piston type hydraulic energy accumulator of impact resistance, including cylinder barrel, the cylinder barrel inner wall bottom fixedly connected with the direction fixed block, the direction fixed block surface has seted up the guide groove. The utility model discloses through the liquid and enters the cylinder barrel inside through the liquid passage, and then the liquid will upwardly lift the slider reset block, and the slider reset block drives pressure lift slider, makes pressure lift slider along with the guide groove that the direction fixed block seted up and slides up, thereby makes the liquid and flows to the cylinder barrel inside through the clearance between slider reset block bottom and the top of direction fixed block, thereby makes the liquid and enters the cylinder barrel inside through the guide groove, and then the liquid will piston rod along with cylinder barrel inside and upwardly lift, and pressure lift slider will along with the surface of spacing ring and slide up, makes pressure lift slider and block spacing ring, prevents the pressure that liquid produces in the process of piston rod lift and has the influence of pressure loss and promotes effect.

Description

Technical Field

[0001] This utility model relates to the field of accumulator technology, and in particular to an impact-resistant piston-type hydraulic accumulator. Background Technology

[0002] A piston-type hydraulic accumulator is an energy storage device that uses a movable piston to isolate hydraulic oil from compressed gas (usually nitrogen). It is mainly used for energy storage, shock absorption, pulsation absorption, and leakage compensation. The cylinder is mainly made of high-strength materials (such as carbon steel and stainless steel) and can withstand pressures of up to 350 bar or more. The piston is mainly made of aluminum alloy or steel and has low-friction seals (such as polyurethane or PTFE) to ensure strict isolation between gas and oil.

[0003] Existing piston-type hydraulic accumulators mainly store pressure energy in the hydraulic system by converting it into potential energy through a sealed piston. However, during use, due to the inertia of the piston, the piston impacts the lower end cover, resulting in insufficient and insensitive device response. In addition, the impact will also cause the internal liquid to affect the cylinder, and the expansion of the liquid will have nowhere to be released, affecting the service life of the cylinder. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an impact-resistant piston-type hydraulic accumulator.

[0005] This utility model is achieved using the following technical solution: an impact-resistant piston-type hydraulic accumulator, comprising a cylinder, a guide block fixedly connected to the bottom of the inner wall of the cylinder, a guide groove formed on the surface of the guide block, a pressure lifting slider slidably connected to the inner wall of the guide groove, a liquid inlet channel formed at the bottom of the cylinder, a slider reset block slidably connected to the inner wall of the liquid inlet channel, a flow guide groove formed at the top of the pressure lifting slider, a return pressure relief groove formed on the inner wall of the cylinder, a fixed seat fixedly connected to the inner wall of the return pressure relief groove, a damping buffer rod fixedly connected to the left side of the fixed seat, a reset spring fixedly connected to the left side of the fixed seat, a sealing plate fixedly connected to the left side of the damping buffer rod, a limit ring slidably connected to the surface of the sealing plate, and a piston rod slidably connected to the inner wall of the cylinder, the top of the piston rod penetrating the inner wall of the cylinder and extending therefrom.

[0006] As a further improvement to the above solution, the top of the slider reset block is fixedly connected to the surface of the pressure lifting slider, the end of the reset spring away from the fixed seat is fixedly connected to the right side of the sealing plate, and the outer wall of the limit ring is fixedly connected to the inner wall of the return pressure relief groove.

[0007] As a further improvement to the above solution, the outer wall of the pressure lifting slider is slidably connected to the surface of the limiting ring, two fixing seats are provided, the two fixing seats are symmetrically arranged with the pressure lifting slider as the center, and two return springs are provided, the two return springs are symmetrically arranged with the pressure lifting slider as the center.

[0008] With the above technical solution, the liquid enters the cylinder through the inlet channel, and then the liquid will push the slider reset block upward. The slider reset block drives the pressure lifting slider, causing the pressure lifting slider to slide upward along the guide groove opened by the guide fixing block. This allows the liquid to flow into the cylinder through the gap between the bottom of the slider reset block and the top of the guide fixing block, and thus the liquid enters the cylinder through the guide groove.

[0009] As a further improvement to the above solution, a piston rod sealing ring is fixedly connected to the bottom of the piston rod, the outer wall of the piston rod sealing ring is slidably connected to the inner wall of the cylinder, and a slider sealing ring is slidably connected to the inner wall of the guide groove.

[0010] As a further improvement to the above solution, the bottom of the slider sealing ring is fixedly connected to the outer wall of the pressure lifting slider, and the top of the pressure lifting slider is fixedly connected to the groove sealing ring.

[0011] As a further improvement to the above solution, the outer wall of the sliding groove sealing ring is slidably connected to the inner wall of the cylinder, and the outer wall of the sliding groove sealing ring is slidably connected to the surface of the limiting ring.

[0012] As a further improvement to the above solution, a sealing ring for the liquid inlet channel is provided at the top of the guide fixing block, and the top of the sealing ring for the liquid inlet channel is fixedly connected to the surface of the slider reset block.

[0013] Through the above technical solution, the piston rod sealing ring is designed so that it is located at the contact point between the piston rod and the inside of the cylinder, preventing oil leakage when the piston rod moves and also having a buffering effect on impact. The slider sealing ring is designed on the surface of the pressure lifting slider, so that the liquid that enters the pressure lifting slider through the liquid inlet channel and then flows in the opposite direction through the guide groove can be sealed, preventing the liquid from entering the guide groove and accumulating, thus affecting its impact resistance.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention utilizes a liquid inlet channel to enter the cylinder. The liquid then pushes the slider reset block upwards, which in turn drives the pressure lifting slider. The pressure lifting slider slides upwards along the guide groove on the guide fixing block, allowing the liquid to flow into the cylinder through the gap between the bottom of the slider reset block and the top of the guide fixing block. The liquid then enters the cylinder through the guide groove, and subsequently pushes the piston rod upwards along the inside of the cylinder. Simultaneously, the pressure lifting slider slides upwards along the surface of the limit ring, blocking the limit ring and preventing pressure loss during the piston rod's lifting process, thus ensuring the pushing effect. When the piston rod is impacted from the top, it impacts the liquid inside the cylinder downwards. The downward impact pressure lifts the slider, causing it to slide the slider reset block into the inlet channel. This pushes the sealing plate inside the cylinder, compressing the reset spring and damping buffer rod. The impact pressure on the liquid is then released outward through the return pressure relief groove. After the pressure tank inside the cylinder is discharged from the return pressure relief groove, the liquid inside the inlet channel continues to push the slider reset block upward. The slider reset block pushes the pressure lift slider, causing it to continue sealing the limit ring and maintaining its lifting effect. Simultaneously, the reset spring pushes the sealing plate to slide into the surface of the limit ring. Through the coordinated design of mechanical damping, hydraulic pressure relief, and spring reset, the impact resistance is significantly improved, making it particularly suitable for high-frequency, high-pressure impact scenarios.

[0016] This invention utilizes a piston rod sealing ring design. Located at the contact point between the piston rod and the cylinder, this ring prevents oil leakage during piston rod movement and also buffers impacts. A slider sealing ring is designed on the surface of the pressure lifting slider, sealing the liquid that enters the pressure lifting slider through the inlet channel and then flows in the reverse direction through the guide groove. This prevents liquid accumulation inside the guide groove, which could affect its impact resistance. A groove sealing ring at the top of the pressure lifting slider seals the liquid between the cylinder and the piston rod, preventing liquid from flowing down the sides of the pressure lifting slider. The groove sealing ring, along with the limiting ring and sealing plate, forms a pressure relief and buffer structure. Under pressure overload, the elastic deformation of the sealing ring allows for gradual pressure relief. The inlet channel sealing ring seals and buffers the surfaces of the slider reset block and guide fixing block when the pressure lifting slider is impacted and slides towards the inlet channel, preventing damage caused by collision between the slider reset block and guide fixing block due to excessive impact force. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2This is a schematic diagram of the cross-sectional structure of the cylinder of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the guide fixing block of this utility model;

[0020] Figure 4 This utility model Figure 3 Enlarged structural diagram of section A in the middle;

[0021] Figure 5 This is a schematic diagram of the reflux pressure relief groove structure of this utility model;

[0022] Figure 6 This utility model Figure 5 Enlarged structural diagram of section B in the middle;

[0023] Figure 7 This is a schematic diagram of the slider sealing ring structure of this utility model.

[0024] Explanation of key symbols:

[0025] 1. Cylinder; 2. Guide fixing block; 3. Guide groove; 4. Pressure lifting slider; 5. Liquid inlet channel; 6. Flow guide groove; 7. Return pressure relief groove; 8. Fixing seat; 9. Damping buffer rod; 10. Return spring; 11. Sealing plate; 12. Limiting ring; 13. Piston rod; 18. Slider return block; 14. Piston rod sealing ring; 15. Slider sealing ring; 16. Slide groove sealing ring; 17. Sealing ring for liquid inlet channel. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] Example:

[0028] Please combine Figure 1-7 This embodiment of an impact-resistant piston-type hydraulic accumulator includes a cylinder 1. A guide block 2 is fixedly connected to the bottom of the inner wall of the cylinder 1. A guide groove 3 is formed on the surface of the guide block 2. A pressure lifting slider 4 is slidably connected to the inner wall of the guide groove 3. An inlet channel 5 is formed at the bottom of the cylinder 1. A slider reset block 18 is slidably connected to the inner wall of the inlet channel 5. A guide groove 6 is formed at the top of the pressure lifting slider 4. A return pressure relief groove 7 is formed on the inner wall of the cylinder 1. A fixed seat 8 is fixedly connected to the inner wall of the return pressure relief groove 7. A damping buffer rod 9 is fixedly connected to the left side of the fixed seat 8. A reset spring 10 is fixedly connected to the left side of the fixed seat 8. A sealing plate 11 is fixedly connected to the left side of the damping buffer rod 9. A limit ring 12 is slidably connected to the surface of the sealing plate 11. A piston rod 13 is slidably connected to the inner wall of the cylinder 1. The top of the piston rod 13 penetrates the inner wall of the cylinder 1 and extends outward.

[0029] The top of the slider reset block 18 is fixedly connected to the surface of the pressure lifting slider 4, the end of the reset spring 10 away from the fixed seat 8 is fixedly connected to the right side of the sealing plate 11, and the outer wall of the limit ring 12 is fixedly connected to the inner wall of the return pressure relief groove 7.

[0030] The outer wall of the pressure lifting slider 4 is slidably connected to the surface of the limit ring 12. There are two fixed seats 8, which are symmetrically arranged with the pressure lifting slider 4 as the center. There are two return springs 10, which are symmetrically arranged with the pressure lifting slider 4 as the center.

[0031] A piston rod sealing ring 14 is fixedly connected to the bottom of the piston rod 13. The outer wall of the piston rod sealing ring 14 is slidably connected to the inner wall of the cylinder 1. A slider sealing ring 15 is slidably connected to the inner wall of the guide groove 3.

[0032] The bottom of the slider sealing ring 15 is fixedly connected to the outer wall of the pressure lifting slider 4, and the top of the pressure lifting slider 4 is fixedly connected to the groove sealing ring 16.

[0033] The outer wall of the sliding groove seal ring 16 is slidably connected to the inner wall of the cylinder 1, and the outer wall of the sliding groove seal ring 16 is slidably connected to the surface of the limit ring 12.

[0034] The top of the guide fixing block 2 is provided with a sealing ring 17 for the liquid inlet channel, and the top of the sealing ring 17 for the liquid inlet channel is fixedly connected to the surface of the slider reset block 18.

[0035] The implementation principle of the impact-resistant piston-type hydraulic accumulator in this embodiment is as follows: Liquid enters the cylinder 1 through the inlet channel 5, and then the liquid pushes the slider reset block 18 upward. The slider reset block 18 drives the pressure lifting slider 4, causing the pressure lifting slider 4 to slide upward along the guide groove 3 opened by the guide fixing block 2. This allows the liquid to flow into the cylinder 1 through the gap between the bottom of the slider reset block 18 and the top of the guide fixing block 2, and then the liquid enters the cylinder 1 through the guide groove 6. Then the liquid pushes the piston rod 13 upward along the inside of the cylinder 1. At the same time, the pressure lifting slider 4 slides upward along the surface of the limit ring 12, causing the pressure lifting slider 4 to block the limit ring 12 and prevent the liquid from impacting the piston rod 13 during the lifting process. The resulting pressure loss affects the pushing effect. When the piston rod 13 is impacted from the top, it impacts the liquid inside the cylinder 1 downwards. Simultaneously, the liquid inside the cylinder 1 impacts the pressure lifting slider 4 downwards, causing it to drive the slider reset block 18 to slide into the inlet channel 5. This causes the pressure inside the cylinder 1 to push the sealing plate 11, which compresses the reset spring 10 and the damping buffer rod 9. Consequently, the pressure on the liquid is discharged outwards through the return pressure relief groove 7. After the pressure tank inside the cylinder 1 is discharged through the return pressure relief groove 7, the liquid inside the inlet channel 5 continues to push the slider reset block 18 upwards. The slider reset block 18 then pushes the pressure lifting slider 4, causing it to reach its limit position. Ring 12 continues to seal, maintaining its lifting effect. Simultaneously, under the push of the return spring 10, the sealing plate 11 slides into the surface of the limiting ring 12. Through the synergistic design of mechanical damping, hydraulic pressure relief, and spring return, the impact resistance is significantly improved, making it particularly suitable for high-frequency, high-pressure impact scenarios. Furthermore, the piston rod sealing ring 14, located at the contact point between the piston rod 13 and the cylinder 1, prevents oil leakage during piston rod 13 movement and also buffers impacts. The slider sealing ring 15 is designed on the surface of the pressure lifting slider 4, sealing the liquid that enters the pressure lifting slider 4 through the inlet channel 5 and then flows in the reverse direction through the guide groove 6. This prevents liquid from accumulating inside the guide groove 3 and affecting its impact resistance. Then, by using the groove sealing ring 16 set on the top of the pressure lifting slider 4, the groove sealing ring 16 seals the liquid between the cylinder 1 and the piston rod 13, preventing the liquid from flowing to the bottom through the side of the pressure lifting slider 4. The groove sealing ring 16, the limiting ring 12, and the sealing plate 11 can form a pressure relief buffer structure. When the pressure is overloaded, the elastic deformation of the sealing ring can achieve gradual pressure relief. The design of the sealing ring 17 for the liquid inlet channel can seal and buffer the surface of the slider reset block 18 and the guide fixing block 2 when the pressure lifting slider 4 is impacted and the slider reset block 18 slides towards the liquid inlet channel 5. This prevents the slider reset block 18 from colliding with the guide fixing block 2 due to excessive impact force, which would cause damage.

[0036] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An impact-resistant piston-type hydraulic accumulator, characterized in that, The cylinder includes a cylinder (1), a guide block (2) is fixedly connected to the bottom of the inner wall of the cylinder (1), a guide groove (3) is provided on the surface of the guide block (2), a pressure lifting slider (4) is slidably connected to the inner wall of the guide groove (3), a liquid inlet channel (5) is provided at the bottom of the cylinder (1), a slider reset block (18) is slidably connected to the inner wall of the liquid inlet channel (5), a guide groove (6) is provided at the top of the pressure lifting slider (4), and a return pressure relief groove (7) is provided on the inner wall of the cylinder (1). The inner wall of the return pressure relief groove (7) is fixedly connected to a fixed seat (8), a damping buffer rod (9) is fixedly connected to the left side of the fixed seat (8), a reset spring (10) is fixedly connected to the left side of the fixed seat (8), a sealing plate (11) is fixedly connected to the left side of the damping buffer rod (9), a limit ring (12) is slidably connected to the surface of the sealing plate (11), a piston rod (13) is slidably connected to the inner wall of the cylinder (1), and the top of the piston rod (13) penetrates the inner wall of the cylinder (1) and extends out.

2. The shock-resistant piston-type hydraulic accumulator as described in claim 1, characterized in that: The top of the slider reset block (18) is fixedly connected to the surface of the pressure lifting slider (4), the end of the reset spring (10) away from the fixed seat (8) is fixedly connected to the right side of the sealing plate (11), and the outer wall of the limiting ring (12) is fixedly connected to the inner wall of the return pressure relief groove (7).

3. The impact-resistant piston-type hydraulic accumulator as described in claim 1, characterized in that: The outer wall of the pressure lifting slider (4) is slidably connected to the surface of the limiting ring (12). There are two fixed seats (8), which are symmetrically arranged with respect to the pressure lifting slider (4). There are two reset springs (10), which are symmetrically arranged with respect to the pressure lifting slider (4).

4. The impact-resistant piston-type hydraulic accumulator as described in claim 1, characterized in that: The piston rod (13) is fixedly connected to the bottom of a piston rod sealing ring (14), the outer wall of the piston rod sealing ring (14) is slidably connected to the inner wall of the cylinder (1), and the inner wall of the guide groove (3) is slidably connected to a slider sealing ring (15).

5. The impact-resistant piston-type hydraulic accumulator as described in claim 4, characterized in that: The bottom of the slider sealing ring (15) is fixedly connected to the outer wall of the pressure lifting slider (4), and the top of the pressure lifting slider (4) is fixedly connected to the groove sealing ring (16).

6. The impact-resistant piston-type hydraulic accumulator as described in claim 5, characterized in that: The outer wall of the groove sealing ring (16) is slidably connected to the inner wall of the cylinder (1), and the outer wall of the groove sealing ring (16) is slidably connected to the surface of the limiting ring (12).

7. The shock-resistant piston-type hydraulic accumulator as described in claim 1, characterized in that: The top of the guide fixing block (2) is provided with a sealing ring (17) for the liquid inlet channel, and the top of the sealing ring (17) for the liquid inlet channel is fixedly connected to the surface of the slider reset block (18).

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