Piston Accumulator

A Piston Accumulator is a mechanical device that uses the compressibility of a gas (usually nitrogen) to store hydraulic energy. It is widely used in hydraulic systems as an energy regulator. It isolates the hydraulic fluid from the gas through a piston to achieve efficient energy storage and release.

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Core Definition and Structure
A piston accumulator belongs to the category of hydraulically isolated accumulators. It mainly consists of the following components:
1. Main Structure: Includes a cylinder (oil chamber), piston, gas chamber, and end caps. The piston is located inside the cylinder, separating the hydraulic fluid chamber (lower part) from the gas chamber (upper part).
2. Sealing System: High-precision seals are installed on both sides of the piston to prevent gas from seeping into the hydraulic fluid, thus maintaining the cleanliness of the hydraulic fluid.
3. Control Valves: Typically equipped with a pre-charge valve and a check valve for charging compressed gas and controlling the flow of hydraulic fluid.

Working Principle
The working process of a piston accumulator is similar to that of a giant "spring":
1. Energy Storage Stage: When the pressure in the hydraulic system increases (above the pre-charge pressure of the gas), hydraulic fluid enters the accumulator through a check valve, pushing the piston upward and compressing the gas in the upper part. As the gas volume decreases, energy is stored.
2. Energy Release Stage: When the system needs additional hydraulic energy (pressure drops), the compressed gas expands rapidly, pushing the piston downward. The downward movement of the piston forces the hydraulic fluid back into the system, releasing the energy.

Ordering Note
1. For example: Nominal pressure: 31.5MPa. Inner diameter of the shell (mm): 180mm, nominal volume: 20L, hydraulic port: threaded; the end cap thread type: male, medium: hydraulic oil; a typical model code for the piston accumulator would be: HXQ-A-20/31.5-L-Y-180.
2. For the special requirement to the pistion accumulator, please contact us.
3. We reserve the right to revise the design.

Product
Description

We can design and develop according to the needs of our customers to meet the requirements of different clients.

Model Designations

1. Product Type
Piston accumulators

2. Construction
A: The end cap thread: male
B: The end cap thread: female

3. Nominal Volume(L): 0.5~250L

4. Nominal Pressure(MPa): 10-31.5MPa

5. Hydraulic Port
L: Threaded
F: Flanged

6. Medium
Y: Hydraulic oil
R: Emulsion&water-glycol

7. Inside Diameter Parameter(mm)

Product Specifications

Model Code and Size

Model Code	Nominal Volume (L)	ΦD1 (mm)	ΦD2 (mm)	A (mm)	Allowable Operating Pressure (MPa)	ΦD3 (mm)	M	Weight (kg)
HXQ-A-0.5/※-L-Y-80	0.5	80	98	275	10~31.5	35	M27×2	10
HXQ-A-1/※-L-Y-80	1	80	98	375	10~31.5	35	M27×2	12
HXQ-A-2/※-L-Y-80	2	80	98	575	10~31.5	35	M27×2	16
HXQ-A-2.5/※-L-Y-100	2.5	100	126	500	10~31.5	50	M42×2	26
HXQ-A-5/※-L-Y-80	5	100	126	820	10~31.5	50	M42×2	38
HXQ-A-7.5/※-L-Y-100	7.5	100	126	1140	10~31.5	50	M42×2	49
HXQ-A-2/※-L-Y-125	2	125	155	360	10~31.5	50	M42×2	34
HXQ-A-5/※-L-Y-125	5	125	155	600	10~31.5	50	M42×2	49
HXQ-A-15/※-L-Y-125	15	125	155	1415	10~31.5	50	M42×2	99
HXQ-A-6/※-L-Y-150	6	150	180	555	10~31.5	60	M48×2	52
HXQ-A-20/※-L-Y-150	20	150	180	1345	10~31.5	60	M48×2	100
HXQ-A-32/※-L-Y-150	32	150	180	2025	10~31.5	60	M48×2	142
HXQ-A-10/※-L-Y-180	10	180	216	655	10~31.5	70	M60×2	93
HXQ-A-20/※-L-Y-180	20	180	216	1050	10~31.5	70	M60×2	128
HXQ-A-50/※-L-Y-180	50	180	216	2225	10~31.5	70	M60×2	231
HXQ-A-20/※-L-Y-200	20	200	235	925	10~31.5	70	M60×2	136
HXQ-A-40/※-L-Y-200	40	200	235	1565	10~31.5	70	M60×2	196
HXQ-A-80/※-L-Y-200	80	200	235	2835	10~31.5	70	M60×2	316
HXQ-A-50/※-L-Y-250	50	250	290	1345	10~31.5	80	M72×2	256
HXQ-A-80/※-L-Y-250	80	250	290	1960	10~31.5	80	M72×2	338
HXQ-A-100/※-L-Y-250	100	250	290	2360	10~31.5	80	M72×2	390
HXQ-A-125/※-L-Y-250	120	250	290	2775	10~31.5	80	M72×2	446
HXQ-A-100/※-L-Y-350	100	350	406	1530	10~31.5	80	M72×2	560
HXQ-A-120/※-L-Y-350	120	350	406	1740	10~31.5	80	M72×2	610
HXQ-A-180/※-L-Y-350	180	350	406	2360	10~31.5	80	M72×2	750
HXQ-A-250/※-L-Y-350	250	350	406	3000	10~31.5	80	M72×2	900