HAWE
Hawe Axial Piston Pump V30D
  • Description
  • Technique Feature
  • Specification
  • Applied Range

HAWE Variable displacement axial piston pump type V30D

General description

 The axial piston variable displacement pumps of the type V30 of D offer extremely high function safety. Its remarkably low noise levels, the high pressure rating (peak = 420 bar / perm. = 350 bar), optimined power-to-weight-ratio as well as the wide controller range make it possible to employ it for most industrial and mobile applications. The variable displacement pumps work according to the swash plate principal: 9 pistons operate in a rotating cylinder cavities where they fulfill one suction and one pressure stroke per rotation.

Opening and closing of the cylinder cavities is via openings in the control disc. The axial movement of the pistons is provided by an adjustable swash plate. The setting angle (0 - max) can be steplessly varied in proportion to the desired displacement/flow. The setting range can be mechanically limited by setting screws (with V and VH controller only fixed limitation is possible). The position of the swash plate can be controlled via a visual mechanical indicator.

The latest knowledge and experience with regard to noise reduction has been used in the development of this pump design. V30D is therefore rather quiet, even when taken to the limit. All components used in the V30D are manufactured from high grade materials and machined with close tolerances.

The wide range of modular controllers along with a thru-shaft (option for mounting auxiliary pumps or a second V30D) open up a wide range of application possibilities.

Therefore type V30D features a pump design, which ideally suits the special requirements of modern industrial and mobile hydraulic drive systems.

 

Outstanding design features:

- Low specific weight.

- Very fast response times due to low mass moment of inertia of the setting unit.

- Special swash plate bearing helps reduce noise.

- New design of the hydrostatically balanced steel slipper shoes running on a bronze plate improves the life of typical wearing parts.

- Valve plate made from steel provides high wear resistance. Carefully designed dampening slots result in exceptionally low noise level.

- Large shaft bearings provide long life.

 

The most important advantages:

- Low noise level, whereby secondary measures to reduce noise often are not necessary.

- Controller assemblies have been designed on a modular basis and can be installed without dismantling the basic pump.

- Thru- shaft allows tandem pump combinations and mounting of auxiliary pumps of all kinds (see sect. 5).

- Swash plate dial indicator provides visual indication of displacement and can also be used to provide feedback information in control systems.

 

HAWE Variable displacement axial piston pump type V30D

 

Working principle Variable displacement axial piston pump acc. to swash plate principle
Installation Flange or brachet mounting
Direction of rotation Right hand or left hand
Mounting position Optional
Pressure fluid Hydraulic fluid (DIN 51524 table 2 and 3); ISO VG 10 to 68 (DIN 51519)
Viscosity range: min. 10; max. 1000 mm2/s,
optimal operation range: 10...35 mm2/s
Also suitable are biodegradable pressure fluids of the type HEES (synth. Ester) at operation
temperatures up to +70°C
Temperatur Ambient: -40 ... +60°C
Fluid: -25...+80°C, pay attention to the viscosity range!
Start temperature down to -40°C are allowable (Pay attention to the viscosity range during start
long as the operation temperature during consequent running is at least 20K (Kelvin) higher
Filtration Should conform to ISO standard 4406 coding 18/13.
Start-up All hydraulic lines should be flushed with appropriate hydraulic fluid before start-up. The pump
case should then be titled through the uppermost drain port. The drain line must be positioned 
so that the case is always filled during operation. At start-up and during the first few minutes
of the operation the pressure relief valve should be adjusted to 50 bar (700 psi) or less. 

 

Designation 045 075 095 115 140 160 250
Max. swash plate angle                           [°] 17 17.5 17 20 17.5 20 17.5
Min. inlet pressure (absolute),               bar 0.85 0.85 0.85 0.85 0.85 0.85 0.85
open circuit                                               (psi) 12 12 12 12 12 12 12
Self-priming speed at max                     rpm
swash plate angle and 1 bar (15 psi )
absolute inlet pressure
2600 2400 2200 2000 2200 1900 1800
Max. speed                                                rpm
(requires increased inlet pressure)
3600 3200 2900 2800 2600 2500 2000
Min. continuous speed                            rpm 500 500 500 500 500 500 500
Torque (theor.) at 1000 psi                      Nm 71 119 153 185 226 261 414
                                                                  (Ibf ft) 35 61 78 93 115 132 203
Input power at 250 bar and 1450 rpm   kW 30 50 64 77 95 109 174
at 3000 psiand 1800 rpm                       (hp) 41 68 87 105 129 148 237
Weight (approx. kg)          without controller 40 60 70 70 85 85 130
             (approx. lbs)          without controller 88 132 154 154 187 187 287
             (approx. kg)            with controller 46 66 76 76 91 91 136
             (approx. lbs)           with controller 101 145 168 168 201 201 300
Moment of inertia                                 kg m2 0.0056 0.0124 0.0216 0.0216 0.03 0.03 0.0825
                                                     (ft. Ibs. sec2) 0.0041 0.0092 0.016 0.016 0.022 0.022 0.061
L10 bearing life at 250bar (1450 rpm)     (h) 31000 20000 17000 10000 17000 10000 23000
or 3600 psi (1800 rpm) and                        (h)
max. displacement
25000 16000 14000 8000 14000 8000 19000
               
Max. dynamic torque              
Spline shaft (D) input                                Nm 550 910 1200 1200 1700 1700 3100
                                                                  (Ibf ft) 405 670 885 885 1250   2285
Spline shaft (D) output                             Nm 275 455 600 600 850 850 1550
                                                                  (Ibf ft) 205 333 445 445 625   1145
Key shaft (K) input                                     Nm 280 460 650 650 850 850 1550
                                                                  (Ibf ft) 205 340 480 480 630 630 1145
Spline shaft (S) input                                 Nm 500 501 1200 1200 1200 1200 1200
                                                                   (Ibf ft) 370 370 885 885 885 885 885
Spline shaft (S) output 1)                          Nm 275 455 600 600 850 850 1000
                                                                   (Ibf ft) 205 335 445 445 625 625 740
Noise level at 250 bar and (1450 rpm), (dB(A)) 72 74 75 75 76 76 77
or 3600 psi and max. (1800 rpm)           (dB(A)) 75 78 79 79 80 80 82
displacement (measured in a semi
anechoic room according to ISO 4412
measuring distance 1m)
1) (theoretical) Drive torque must not be exeeded.
2) The max. geometric displacement of 260 cm3/rev can only be achieved up to a self sucking speed of 1600 rpm.
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