Pneumohydraulic Drive (with Separate Working Cylinder), HZ Series
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- Operating pressure ≤6bar
- Pressing force 2-2000kN
- Force stroke 5-52mm
- Total stroke 100/200/250mm
The pneumohydraulic drive combines the advantages of compressed air and hydraulic systems, integrating the high-speed motion of the pneumatic cylinder with the high intensity of hydraulic systems. The pneumohydraulic drive is a specially designed cylinder that requires an intensifier to drive low-pressure oil for the rapid advance stroke. Once in position, the intensifier provides high-pressure oil to perform the work.
Operating Parameters
| Model | Cylinder bore (mm) | Pressing Force Output (kN, at 250 bar input oil pressure ) | Approach Stroke Force (kg, at 6 bar air pressure) | Return Stroke Force (kg, at 6 bar air pressure) | Oil Consumption per 1mm Stroke (V, CC) | Approach Stroke Oil Loss (V1, cCC, per 50mm) | Hose Expansion/Loss (V2, CC, per 100mm of hose length) | Hydraulic Hose Specification |
| | 50.00 | 48.00 | 115.00 | 90.00 | 2.00 | 2.20 | 0.50 | 3/8" Two-Layer Wire Spiral High-Pressure Hose |
| | 63.00 | 76.00 | 185.00 | 130.00 | 3.10 | 3.40 | 0.60 | 3/8" Two-Layer Wire Spiral High-Pressure Hose |
| | 80.00 | 108.00 | 260.00 | 210.00 | 4.40 | 4.90 | 0.60 | 1/2" Four-Layer Wire Spiral High-Pressure Hose |
| | 100.00 | 192.00 | 465.00 | 350.00 | 7.90 | 8.60 | 0.70 | 1/2" Four-Layer Wire Spiral High-Pressure Hose |
| | 125.00 | 300.00 | 720.00 | 580.00 | 12.30 | 13.50 | 0.70 | 1/2" Four-Layer Wire Spiral High-Pressure Hose |
| | 160.00 | 492.00 | 1182.00 | 887.00 | 20.10 | 22.00 | 0.70 | 1" Four-Layer Wire Spiral High-Pressure Hose |
Cylinder Stroke Parameters
| Model | A1 | B (based on stroke change) | C | D | E | F (f7) | G | H | K | L | M | N | V | W | X |
| | 67 | 240 (stroke-100) | 6-M8×15 | 54 | G3/8 | 40 | 10 | 25 | 25 | M16×1.5 | 22 | 19 | 12 | 7 | G1/2 |
| | 85 | 255 (stroke-100) | 6-M8×15 | 65 | G3/8 | 52 | 10 | 35 | 25 | M22×2 | 20 | 17 | 18 | 7 | G3/4 |
| | 112 | 265 (stroke-100) | 6-M10×20 | 88 | G1/2 | 70 | 10 | 45 | 35 | M30×2 | 25 | 36 | G3/4 | ||
| | 128 | 275 (stroke-100) | 6-M16×25 | 100 | G1/2 | 75 | 10 | 50 | 30 | M30×2 | 25 | 41 | G3/4 | ||
| | 160 | 290 (stroke-100) | 6-M20×30 | 115 | G3/4 | 80 | 15 | 56 | 47 | M39×2 | 35 | 46 | G1 | ||
| | 200 | 320 (stroke-100) | 8-M20×30 | 150 | G3/4 | 115 | 18 | 70 | 52 | M42×2 | 40 | 60 | G1 |
Configuration Diagram
HZ Cylinder (Multiple Units) HMPSxxx-xxx Intensifier
Cylinder Selection Example
- Requirement: 2 cylinders with 60kN force, 130mm stroke, 12mm pressure stroke, side-exit oil port, synchronous action, oil pipe length 1200mm, with an intensifier option.
- The HZ07 cylinder provides a maximum output of 76kN at an oil pressure of 250 bar, which meets the application requirements. To drive this, the HMPS series intensifier is selected, which utilizes 6 bar air pressure to generate a maximum hydraulic output of 250 bar.
- A1 (Cylinder Stroke): Since the required stroke is 130mm, a standard 150mm stroke is selected.
Total volume for 2 cylinders = 2×150 ×3.1CC×1.5 (Safety storage coefficient) = 1395CC - A2 (Volume Loss Due to Hose Length) = (1200/50)×3.1CC (V1) = 74.4CC
- A0 (Total Required Low-Pressure Oil): 1395CC 74.4CC = 1469.4CC
- B1 (Cylinder Consumption): Volume for 2 cylinders = 2×12×3.1CC (V) = 74.4 CC.
- B2 (Volume Loss Due to High-Pressure Hose Expansion) = 2×(1200/100)×0.6 CC (V2) = 14.4 CC.
- B0 (Total Required High-Pressure Oil): 74.4 CC 14.4 CC = 88.8 CC.
- Final Selection Result
Working Cylinders: HZ07-150-02 (Quantity: 2 units)
Drive Intensifier: HMPS160.100.134 (Quantity: 1 unit)
High-Pressure Hoses: LH06-1200 (Quantity: 2 units)
In automated press-fit lines running continuously, how is thermal stability maintained?
In automated press-fit lines running continuously, how is thermal stability maintained?
The pneumohydraulic drive generates minimal heat, ensuring stable performance during continuous operation and preventing output fluctuations due to temperature rise.
For automated stations requiring high reliability, how proven is the working principle?
For automated stations requiring high reliability, how proven is the working principle?
The combination of pneumatic and hydraulic intensification has been long proven across various industrial sectors, making the technology mature and highly reliable.