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Home>Products>Hydraulic Piston Pump/Motor>R902021574 A2FO12/61L-PZP06 Rexroth A2FO Series Axial Piston Pump
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R902021574 A2FO12/61L-PZP06 Rexroth A2FO Series Axial Piston Pump
- Rexroth
R902021574 A2FO12/61L-PZP06
- Germany
- CE ISO
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- 60pcs
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Loyal Bearing Co.Ltd2020-07-10 09:46:19
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Product Description
Product Description
R902021574 A2FO12/61L-PZP06 Technical data:
| Size | 5 | 10 | 12 | 16 | 23 | 28 | 32 | 45 | 56 | 63 | |||
| Displacement | Vg | cm³ | 4.93 | 10.3 | 12 | 16 | 22.9 | 28.1 | 32 | 45.6 | 56.1 | 63 | |
| geometric, per revolution | |||||||||||||
| Nominal pressure | pnom | bar | 315 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | |
| Maximum pressure | pmax | bar | 350 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | |
| Maximum speed | nnom 1) | rpm | 5600 | 3150 | 3150 | 3150 | 2500 | 2500 | 2500 | 2240 | 2000 | 2000 | |
| nmax 2) | rpm | 8000 | 6000 | 6000 | 6000 | 4750 | 4750 | 4750 | 4250 | 3750 | 3750 | ||
| Flow | at nnom | qV | l/min | 27.6 | 32 | 38 | 50 | 57 | 70 | 80 | 102 | 112 | 126 |
| Power | at nnomand pnom | P | kW | 14.5 | 22 | 25 | 34 | 38 | 47 | 53 | 68 | 75 | 84 |
| Torque 3) | at pnom | M | Nm | 24.7 | 66 | 76 | 102 | 146 | 179 | 204 | 290 | 357 | 401 |
| Rotary stiffness | c | kNm/rad | 0.63 | 0.92 | 1.25 | 1.59 | 2.56 | 2.93 | 3.12 | 4.18 | 5.94 | 6.25 | |
| Moment of inertia for rotary group | JTW | kg·m² | 0.00006 | 0.0004 | 0.0004 | 0.0004 | 0.0012 | 0.0012 | 0.0012 | 0.0024 | 0.0042 | 0.0042 | |
| Maximum angular acceleration | ɑ | rad/s² | 5000 | 5000 | 5000 | 5000 | 6500 | 6500 | 6500 | 14600 | 7500 | 7500 | |
| Case volume | V | l | 0.17 | 0.17 | 0.17 | 0.2 | 0.2 | 0.2 | 0.33 | 0.45 | 0.45 | ||
| Weight (approx.) | m | kg | 2.5 | 6 | 6 | 6 | 9.5 | 9.5 | 9.5 | 13.5 | 18 | 18 | |
Maximum speed
| 1) | These values are valid at: - an absolute pressure of pabs = 1 bar at suction port S - for the optimum viscosity range from vopt = 36 to 16 mm2/s - with hydraulic fluid based on mineral oils |
| 2) | Maximum speed (limiting speed) with increased inlet pressure pabs at suction port S, see the following diagram. |
| 3) | Torque without radial force, with radial force see table "Permissible radial and axial forces of the drive shafts |
Note
- The values in the table are theoretical values, without consideration of efficiencies and tolerances. The values are rounded.
- Exceeding the maximum or falling below the minimum permissible values can lead to a loss of function, a reduction in operational service life or total destruction of the axial piston unit. Other permissible limit values, such as speed variation, reduced angular acceleration as a function of the frequency and the permissible angular acceleration at start (lower than the maximum angular acceleration) can be CONTACT US.
| Determining the operating characteristics | ||
| Flow |
| [l/min] |
| Torque |
| [Nm] |
| Power |
| [kW] |
| Key | |
| Vg | Displacement per revolution [cm3] |
| Δp | Differential pressure [bar] |
| n | Rotational speed [rpm] |
| ηv | Volumetric efficiency |
| ηhm | Hydraulic-mechanical efficiency |
| ηt | Total efficiency (ηt = ηv • ηhm) |
Hydraulic fluids
The axial piston unit is designed for operation with mineral oil HLP according to DIN 51524.
Application instructions and requirements for hydraulic fluids should be taken from the following data sheets before the start of project planning:
90220: Hydraulic fluids based on mineral oils and related hydrocarbons
90221: Environmentally acceptable hydraulic fluids
90222: Fire-resistant, water-free hydraulic fluids (HFDR, HFDU)
90223: Fire-resistan, water-containing hydraulic fluids (HFAE, HFAS, HFB, HFC)
90225: Restricted technical data for operation with fire-resistant hydraulic fluids
Viscosity and temperature of hydraulic fluids
|
| Viscosity | Shaft | Temperature1) | Comment |
| Cold start | νmax ≤ 1600 mm²/s | NBR2) | ϑSt ≥ -40 °C | t ≤ 3 min, without load (p ≤ 50 bar), n ≤ 1000 rpm, |
| FKM | ϑSt ≥ -25 °C | |||
| Warm-up phase | ν = 400 … 1600 mm²/s |
| t ≤ 15 min, p ≤ 0.7 • pnom and n ≤ 0.5 • nnom | |
| Continuous operation | ν = 10 … 400 mm²/s3) | NBR2) | ϑ ≤ +78 °C | measured at port T |
| FKM | ϑ ≤ +103 °C | |||
| νopt = 16 … 36 mm²/s | range of optimum operating viscosity and efficiency | |||
| Short-term operation | νmin = 7 … 10 mm²/s | NBR2) | ϑ ≤ +78 °C | t ≤ 3 min, p ≤ 0.3 • pnom measured at port T |
| FKM | ϑ ≤ +103 °C |
| 1) | If the specified temperatures cannot be maintained due to extreme operating parameters, please contact us. |
| 2) | Special version, please contact us. |
| 3) | Equates e.g. with the VG 46 a temperature range of +5 °C to +85 °C (see selection diagram) |
Explanatory note regarding the selection of hydraulic fluid
The hydraulic fluid should be selected such that the operating viscosity in the operating temperature range is within the optimum range (vopt see selection diagram).
Selection diagram
Filtration of the hydraulic fluid
Finer filtration improves the cleanliness level of the hydraulic fluid, which increases the service life of the axial piston unit.
A cleanliness level of at least 20/18/15 is to be maintained according to ISO 4406.
At a hydraulic fluid viscosity of less than 10 mm²/s (e.g. due to high temperatures in short-term operation) at the drain port, a cleanliness level of at least 19/17/14 according to ISO 4406 is required.
For example, the viscosity is 10 mm²/s at:
- HLP 32 a temperature of 73°C
- HLP 46 a temperature of 85°C
Operating pressure range
| Pressure at working port A or B (high-pressure side) | Definition | ||
| Nominal pressure | pnom | see table of values | The nominal pressure corresponds to the maximum design pressure. |
| Maximum pressure | pmax | see table of values | The maximum pressure corresponds to the maximum operating pressure within the single operating period. The sum of the single operating periods must not exceed the total operating period. |
| Single operating period | 10 s | ||
| Total operating period | 300 h | ||
| Minimum pressure | pHP min | 25 bar | Minimum pressure on high-pressure side (port A or B) required to prevent damage to the axial piston unit. |
| Rate of pressure change | RA max | 16000 bar/s | Maximum permissible rate of pressure build-up and reduction during a pressure change over the entire pressure range. |
| Pressure at suction port S (inlet) | Definition | ||
| Minimum pressure | ps min | 0.8 bar absolute | Minimum pressure at inlet (suction port S) that is required to avoid damage to the axial piston unit. The minimum required pressure is dependent on the speed of the axial piston unit. |
| Maximum pressure | ps max | 30 bar absolute | |
| Case pressure at port T | Definition | ||
| Continuous differential pressure | ΔpT cont | 2 bar | Maximum averaged differential pressure at the shaft seal (case to ambient) |
| Maximum differential pressure | ΔpT max | see diagram "Maximum differential pressure at the shaft seal" | Intermittent differential pressure at the shaft seal (permitted at reduced speed) |
| Pressure peaks | pT peak | 10 bar | t |
Note
- Working pressure range valid when using hydraulic fluids based on mineral oils. Values for other hydraulic fluids, please contact us.
Pressure definition
| 1 | Direction of rotation "clockwise", pressure at port B |
| 2 | Direction of rotation "counter-clockwise", pressure at port A |
Long-life bearing
Size 250 to 1000
For long life cycle and use with HF hydraulic fluids. Identical external dimensions as design with standard bearing. Subsequent modification to long-life bearing is possible. Bearing and housing flushing via connection U is recommended.
Bearing flushing
Flushing flow (recommended)
| Size | 250 | 355 | 500 | 710 | 1000 | |
| Flushing flow qv | l/min | 10 | 16 | 16 | 16 | 16 |
Leader Industrial Manufacture Co.,Limited. is a professional agent of foreign brand plunger pumps and hydraulic pumps. It mainly deals in Resroth,Yuken,Daikin,Nachi,Vickers,Sumitomo,Tokimec,Uhida,Yeoshe,Dension, and other European and American brands of original oil pumps, pump cores and accessories. Leader Industrial is committed to providing professional suppliers of hydraulic machinery equipment and accessories.It is widely used in injection moulding machine, die-casting machine, oil press, ship machinery, construction machinery, concrete pump truck, mixing truck, construction machinery, rotary drilling machine, bulldozer, loader, roller, paver, crane machinery, forklift, coal mine machinery, port machinery, oil field machinery and other heavy engineering machinery series.
Loyal Bearing Co., Ltd. has been highly praised by the industry for its high quality products, excellent service and timely supply capability. Loyal Bearing Co., Ltd. wholeheartedly welcomes domestic and foreign customers, peers to call or come to discuss cooperation to create a better future!
Contact Us
- Loyal Bearing Co.Ltd
- Address38 Wang Chiu Rd Kowloon Bay Hongkong
- Phone(Working Time)00852 9518 9139
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