Self-regulating pump
HPR

Displacement size from 55 to 165D cc
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Self-regulating pump for open circuit operation

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.

Advantages

  • 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

Design characteristics

  • 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

Controls

  • LP load sensing with pressure cut-off
  • H1L load sensing with hydraulic ΔpLS – override
  • E1L load sensing with electrical ΔpLS – override
  • LEP load sensing with electric stroke limiter and pressure cut-off
  • ETP electro-proportional with hyperbolic power-limiter and pressure cut-off
  • TL2 load sensing with hyperbolic power limiter

Technical Data

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 2x125 2x165
Max operating speed* rpm 2700 2500 2500 2500 2350 2400 2100 2250² 2000 2450 2400 2100
Max. volume flow** l/min 148.5 189.8 237.5 246.8 312.1 392.6 441.2 563² 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 328² 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)

Sectional View

  • 1LS-regulator: optimum utilisation of power
  • 2swash plate: hydrostatic bearing
  • 3piston-slipper assembly: 21° swash angle
  • 4housing: one-piece design for high rigidity
  • 5valve plate housing: highly integrated
  • 6two control pistons: servo-controlled swash plate
  • 7power take-off: for mounting of additional pumps
  • 8cylinder barrel: compact due to 21° technology
  • 9suction channel: optimised suction capacity without tank pressurization
  • 10SPU: reduced pressure pulsation over the entire operating range

Downloads

Name File-Type Size  
LHY Product Catalogue PDF 3.62 Mb Download
HPR-02. Self-regulating pump for open loop operation PDF 2.92 Mb Download
HPR-02_CAD-Download ZIP 56.68 Mb Download
Fact Sheet HPR 165-02 PDF 2.44 Mb Download
Fact Sheet HPR 95-02 PDF 414.84 Kb Download
Operating Instructions OL_EN_2018-07 PDF 567.21 Kb Download

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