Piston buffer type energy accumulator

Abstract

The utility model discloses a piston buffer type energy accumulator, and relates to the technical field of piston energy accumulators. Comprising an energy accumulator body, the energy accumulator body comprises a cylinder barrel and a main piston movably arranged in the cylinder barrel, and an oil port end cover and an air port end cover are arranged in the two ends of the cylinder barrel respectively; a buffering piston is arranged in the main piston, and a buffering end cover is further arranged in one end of the main piston. The main piston divides an oil cavity and an air cavity, energy storage and release are achieved through reciprocating motion, the buffer piston is movably embedded into the main piston, a two-stage buffer structure is formed, and when system pressure changes suddenly, high-frequency pressure fluctuation is quickly responded and absorbed through the small-mass and low-inertia characteristics of the buffer piston, the impact load of the main piston is reduced, and the dynamic performance of the energy accumulator is improved. And compared with the design of a traditional single-piston energy accumulator and a buffer piston, the response speed and the sealing stability of the energy accumulator are further optimized, economic benefits are met, and the application prospect is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to piston accumulator technical field, concretely is a piston buffer type accumulator. BACKGROUND

[0002] Hydraulic accumulator is a kind of energy storage device in hydraulic pneumatic system.It converts the energy in system into compression energy or potential energy at appropriate time and stores, when system needs, compression energy or potential energy is converted into hydraulic pressure or gas pressure and is released, and is supplied to system again.

[0003] The existing piston accumulator technology is limited by the problems such as large inertia, weak sealing impact resistance, imperfect guiding and buffering mechanism of single piston structure, which leads to obvious performance attenuation under high pressure, high frequency or high dynamic working condition. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of piston buffer type accumulator to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of piston buffer type accumulator, including accumulator main body, the accumulator main body includes cylinder barrel and the main piston of being movably arranged in cylinder barrel interior, the both ends of the cylinder barrel are respectively provided with oil port end cap and gas port end cap;

[0006] The inside of the main piston is provided with buffer piston, and the inside of one end of the main piston is further provided with buffer end cap.

[0007] Further, the middle part, upper middle part and lower middle part of the surface of the main piston are nested with guiding belt one.

[0008] Further, the upper middle part and the lower middle part of the surface of the main piston are nested with gasket.

[0009] Further, the upper middle part and the lower middle part of the surface of the buffer piston are nested with guiding belt two and piston sealing ring.

[0010] Further, the top of the buffer end cap is provided with self-centering combination pad and deflation screw.

[0011] Further, the top of the gas port end cap is provided with gasket and inflation valve.

[0012] Further, the top of the gas port end cap is provided with end cap protective cover.

[0013] Further, the upper middle part of the oil port end cap is nested with baffle one.

[0014] Further, the lower middle part of the gas port end cap is nested with baffle two.

[0015] Further, the middle and lower part of the buffer end cover is nested with a check ring three.

[0016] Compared with the prior art, the piston buffer type energy accumulator has the following beneficial effects:

[0017] The piston buffer type energy accumulator has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The utility model discloses a structure section view;

[0019] Fig. 2 The utility model discloses a main piston structure section view.

[0020] In the drawing: 1, energy accumulator main body;11, cylinder barrel;12, main piston;121, guide band one;122, gley ring;13, oil port end cover;131, check ring one;14, gas port end cover;141, check ring two;15, buffer piston;151, guide band two;152, piston sealing ring;16, buffer end cover;161, check ring three;162, self-centering combination pad;163, deflation screw;17, washer;18, inflation valve;19, end cover protection cover. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figs. 1-2 The utility model discloses a piston buffer type energy accumulator, including energy accumulator main body 1, energy accumulator main body 1 includes cylinder barrel 11 and the main piston 12 of the activity setting in the inside of cylinder barrel 11, the both ends of cylinder barrel 11 are provided with oil port end cover 13 and gas port end cover 14 respectively.

[0023] The inside of main piston 12 is provided with buffer piston 15, and the inside of one end of main piston 12 is further provided with buffer end cover 16.

[0024] The main piston 12 separates the oil cavity and the gas cavity, and realizes energy storage and release through reciprocating motion. In a traditional accumulator, the main piston 12 needs to bear high-pressure alternating load. The buffer piston 15 of the design further optimizes the response speed and sealing stability. The buffer piston 15 is movably embedded in the inside of the main piston 12, forming a two-stage buffer structure. When the system pressure suddenly changes, the buffer piston 15 quickly responds through its small mass and low inertia characteristics, absorbs high-frequency pressure fluctuations, reduces the impact load of the main piston 12, and improves the dynamic performance of the accumulator.

[0025] Specifically, the middle, upper middle and lower middle of the surface of the main piston 12 are nested with guide belts one 121, and the upper middle and lower middle of the surface of the main piston 12 are nested with gasket rings 122.

[0026] In the embodiment, the guide belts one 121 are arranged to support the main piston 12 and correct the motion trajectory, ensure the linear motion of the main piston 12 along the set path, avoid deviation or jam caused by uneven force, isolate the direct metal contact between the main piston 12 and the cylinder barrel 11, prevent scratching, pulling or abnormal wear, especially under high load or frequent motion working conditions, maintain a reasonable gap between the main piston 12 and the cylinder barrel 11, avoid accelerated wear of the sealing element due to excessive extrusion, and at the same time improve the sealing effect and service life. The gasket ring 122 is a key element for sealing the main piston 12. The gasket ring 122 is tightly fitted with the hole wall of the main piston 12 to prevent leakage of hydraulic oil or gas, ensure stable system pressure, provide pre-tightening force, compensate for the wear gap of the slip ring, and ensure long-term sealing effectiveness.

[0027] Specifically, the upper middle and lower middle of the surface of the buffer piston 15 are nested with guide belts two 151 and piston sealing rings 152.

[0028] In the embodiment, the guide belts two 151 are arranged to support the buffer piston 15 and correct the motion trajectory, so that the buffer piston 15 moves linearly along the set path, and avoids deviation or jam caused by uneven force.

[0029] Specifically, the top of the buffer end cover 16 is provided with a self-centering combined pad 162 and a deflation screw 163.

[0030] In the embodiment, the deflation screw 163 is used to discharge air or bubbles in the buffer piston 15, to avoid cavitation or pressure fluctuation interference.

[0031] Specifically, the top of the gas port end cover 14 is provided with a gasket 17 and a gas filling valve 18.

[0032] In the embodiment, the gas filling valve 18 is used to fill nitrogen into the inside of the cylinder barrel 11, and the gasket 17 ensures the sealing between the gas port end cover 14 and the gas filling valve 18.

[0033] Specifically, the top of the gas port end cover 14 is provided with an end cover protective cover 19.

[0034] In this embodiment, the end cover protective cover 19 is used to protect the inflation valve 18 from external impact or contamination, such as dust and liquid erosion, to prolong the service life of the key components.

[0035] Specifically, the middle upper part of the oil port end cover 13 is nested with a check ring one 131, the middle lower part of the gas port end cover 14 is nested with a check ring two 141, and the middle lower part of the buffer end cover 16 is nested with a check ring three 161.

[0036] In this embodiment, the check ring one 131 is used to seal between the oil port end cover 13 and the cylinder barrel 11, the check ring two 141 is used to seal between the gas port end cover 14 and the cylinder barrel 11, and the check ring three 161 is used to seal between the buffer end cover 16 and the buffer piston 15.

[0037] In summary, the piston buffer type energy accumulator separates the oil cavity and the gas cavity by the main piston 12, and realizes energy storage and release through reciprocating motion. The buffer piston 15 is movably embedded in the inside of the main piston 12 to form a two-stage buffer structure. When the system pressure suddenly changes, the small mass and low inertia characteristics of the buffer piston 15 can quickly respond to absorb high-frequency pressure fluctuations and reduce the impact load of the main piston 12, thereby improving the dynamic performance of the energy accumulator. Compared with the traditional single-piston energy accumulator, the design of the buffer piston 15 further optimizes the response speed and sealing stability of the energy accumulator, which is in line with economic benefits and has a wide application prospect.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A piston cushion accumulator comprising an accumulator body (1), characterized in that: The accumulator body (1) comprises a cylinder (11) and a main piston (12) movably arranged inside the cylinder (11), and oil port end covers (13) and air port end covers (14) are arranged at both ends of the cylinder (11). The inside of the main piston (12) is provided with a buffer piston (15), and the inside of one end of the main piston (12) is further provided with a buffer end cover (16).

2. A piston accumulator according to claim 1, characterized in that: The middle, upper middle and lower middle of the surface of the main piston (12) are all nested with guiding belts one (121).

3. A piston accumulator according to claim 1, wherein: The upper middle and lower middle of the surface of the main piston (12) are all nested with Glay rings (122).

4. A piston accumulator according to claim 1, wherein: The upper middle and lower middle of the surface of the buffer piston (15) are all nested with guiding belts two (151) and piston sealing rings (152).

5. A piston accumulator according to claim 1, characterized in that: The top of the buffer end cover (16) is provided with a self-centering combined gasket (162) and a deflation screw (163).

6. A piston accumulator according to claim 1, wherein: The top of the air port end cover (14) is provided with a gasket (17) and an inflation valve (18).

7. A piston accumulator according to claim 1, wherein: The top of the air port end cover (14) is provided with an end cover protection cover (19).

8. A piston accumulator according to claim 1, wherein: The upper middle of the oil port end cover (13) is nested with a retainer ring one (131).

9. A piston accumulator according to claim 1, wherein: The lower middle of the air port end cover (14) is nested with a retainer ring two (141).

10. A piston accumulator according to claim 1, characterized in that: The lower middle of the buffer end cover (16) is nested with a retainer ring three (161).

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