Eternal Hydraulic HPR Self-regulating Pump
Legal emission regulations force manufacturers of mobile machinery to optimize the noise emission of their products. Since secondary measures tend to be expensive and less efficient Linde Hydraulics prefers to fight the noise where it is generated: by optimally connecting an additional volume directly next to the commutation of the HPR-02 pump, Linde Hydraulics invented the SPU silencer. The adaptive SPU reduces pressure pulsations in the regulating pump over the entire range of operation – without loss of power.
| HPR | 55 | 75 | 95 | 105 | 135 | 165 | 210 | 249 | 280 | 105D | 125D | 165D | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. displacement | cc/rev | 55 | 75.9 | 94.7 | 105 | 135.7 | 163.6 | 210.1 | 249.9 | 281.9 | 210 | 2×125 | 2×165 |
| Max operating speed* | rpm | 2700 | 2500 | 2500 | 2500 | 2350 | 2400 | 2100 | 2300² | 2000 | 2450 | 2400 | 2100 |
| Max. volume flow** | l/min | 148.5 | 189.8 | 237.5 | 246.8 | 312.1 | 392.6 | 441.2 | 574.8² | 563.8 | 514.5 | 600.0 | 695.5 |
| Nominal pressure | bar | 420 | 420 | 350 | 420 | 420 | 350 | 420 | 350 | 420 | 420 | 350 | 420 |
| Max. pressure*** | bar | 500 | 500 | 420 | 500 | 500 | 420 | 500 | 420 | 500 | 500 | 420 | 500 |
| Max. housing pressure | bar | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
| Torque | Nm | 368 | 507 | 528 | 702 | 907 | 911 | 1404 | 1392 | 1884 | 1245 | 1393 | 1964 |
| Corner power (theoretical)**** | kW | 104 | 132.8 | 138 | 172.7 | 218.5 | 229 | 308.8 | 335.3² | 394.7 | 319.4 | 337 | 431.8 |
| Weight (approx.) | kg | 39 | 39 | 44.5 | 50 | 65 | 74 | 116 | 125 | 165 | 96 | 113 | 177 |
* without tank pressurization
** theoretical data of a single unit without efficiency effects
*** highest transient pressure, that can temporarily occur
**** (Vmax x nmax x ∆p 420 bar)
Features
- optimum interaction with Linde LSC control valves and LinTronic
- energy saving operation by ‘flow on demand’-control
- dynamic response
- excellent suction up to rated speed
- noise optimization over the whole range of operation
- compact design
- high power density
- high reliability
- long working life
- axial piston pump in swashplate design for high pressure open circuit systems
- clockwise or counter clockwise rotation
- self-priming at high nominal speed
- tank pressurization or swash angle reduction for high speed applications
- adaptive noise optimization SPU
- decompression fluid is discharged via pump housing to keep suction side calm
- exact and robust load sensing controllers with or without swash plate position feedback
APPLICATION
Piston pumps are widely used in high-pressure, high-flow, high-power systems and where the flow needs to be regulated, such as mobile and construction equipment, engineering vehicles, heavy-duty planers, metal forming and stamping, machine tools, hydraulic presses, oilfield equipment, mining and metallurgical machinery, marine and other hydraulic systems.
- Agriculture
- Construction
- Mining
- Forestry
- Material Handling
- Marine
- Municipal Stationary