RA / Internal Gear Pump Model GP3, Series 3X Fixed Displacement. Typical application:

Transcription

1 Sizes 20 to 32 Internal Gear Pump Model GP3, Series 3X Fixed Displacement up to 5076 PSI 1.25 to 1.98 in 3 (350 bar) (20.6 to 32.5 cm 3 ) RA /07.97 Characteristics: Peak pressure of up to PSI (350 bar) Low operating noise Low flow pulsation High efficiency even at low speeds and viscosity due to internal compensation Extended service life due to bearings and internal compensation Suitable for a wide range of fluid viscosity and drive speeds Good suction characteristics H/A 5011/95 Internal gear pump Model GP 3 Typical application: H/C

2 Technical data (For applications outside these parameters please consult us) General Model Model Type of mounting Type of connection/pipe connection Installation position Shaft loading Direction of rotation Hydraulic Size Displacement V in 3 (cm 3 ) 1.26 (20.6) 1.36 (22.2) 1.55 (25.4) 1.98 (32.5) Flow 1 ) q V GPM (L/min) 7.9 (29.9) 8.51 (32.2) 9.72 (36.8) 12.4 (47.1) Operating pressure, absolute Inlet p PSI (bar) 11.6 to 29 PSI (0.8 to 2) Outlet p PSI (bar) 3626 (250) Peak pressure p PSI (bar) 4569 (315) 2 ) / 5076 (350) 3 ) 4061 (280) 2 )/4569 (315) 3 ) Hydraulic fluid HL mineral oil to DIN part 1 / HLP mineral oil to DIN part 2 Please observe the specification set out in data sheet RA Environmentally acceptable fluids on request! Fluid cleanliness Max. permissible level of contamination of hydraulic fluid to NAS 1638 class 10. We therefore recommend a filter with a minimum retention rate of ß In order to ensure a long service life we recommend a maximum permissible degree of contamination of fluid to NAS 1638 class 9. We therefore recommend a filter with a minimum retention rate of ß Hydraulic fluid temperature range F ( C) Internal gear pump, internally compensation Frame size 3 Speed range n min rpm 600 n max rpm 1800 Ambient temperature range F ( C) 4 to ( 20 to + 60) GP 4-hole flange to VDMA Part 1 and ISO 3019/2 Flange connection Optional Radial and axial forces not permitted. For exception, please consult us. Clockwise or counter-clockwise not alternating (viewed on shaft end) Size Weight m lbs (kg) 9.48 (4.3) 10.4 (4.7) 11.2 (5.1) 12.1 (5.5) + 14 to ( 10 to + 80); for other temperatures please consult us. Viscosity range SUS (mm 2 /s) 59 to 1400 (10 to 300); permissible starting viscosity 1 ) measured at n = 1450 rpm 2 ) load change values 10 x 10 6, peak pressure max 6 secs, however, not more than 15 % of duty cycle 3 ) load change values 1 x 10 6, peak pressure max 1 sec, however, not more than 10 % of duty cycle Typical application: P P S 2 S

3 Operating curves, average values; measured at n = 1450 rpm, v = 228 SUS (46 mm 2 /s) and t = 104 F (40 C) Flow (50) 13.2 Flow in GPM (L/min) (45) (40) (35) (30) (25) (20) Size 32 Size 25 Size 22 Size (30) (60) (90) (120) (150) (180) (210) (240) (270) (300) Operating pressure in PSI (bar) Efficiency Efficiency in % (30) (60) (90) (120) (150) (180) (210) (240) (270) (300) Operating pressure in PSI (bar) Size 32; Size 25 Size 22 Size 20 Drive power (30) (30) Drive power in HP (kw) (25) (20) (15) (10) (5) (25) (20) (15) (10) (5) Size 32 Size 25 Size 22 Size (30) (60) (90) (120) (150) (180) (210) (240) (270) (300) Operating pressure in PSI (bar) Measured in an anechoic chamber to DIN , sheet 26 Distance from microphone to pumps = 39.4 inches (1 m) Noise level 66 Noise levels in db (A) Size 32 Size 25 Size 22 Size (30) (60) (90) (120) (150) (180) (210) (240) (270) (300) Operating pressure in PSI (bar) 3

4 Unit dimensions: dimensions in inches (millimeters) Parallel drive shaft, with 4-hole mounting to ISO 3019/2 and VDMA Part 1 S: Size 20, 22, 25 -> ø26/lk 55 bolt circle 55 S: Size 32 -> SAE 1 1/4", 2.0 x 1.19 (50.7 x 30.2) 0.43 (11) P: Size 20, 22, 25 ->ø12/lk35 P: Size 32->SAE 3/4", 1.87 x 0.87 (47.6 x 22.2) Ordering code Size clockwise counter-clockwise a (9) 0.43 (11) (52) (54) (58) (67) 1.77 (45) a/2 a 1.54 (39) 1.14 (29) max.4.88 (124) (8) (h9) 1.1 (28) ø ø (100 h8 ) ø 0.98 ø 25 j (42) 7, (125) max.4.88 (124) 4.96 (126) 2.05 (52) Suction and pressure ports: dimensions in inches (millimeters) Ports "07" for Size 32 Ports "20" for Sizes 20, 22, 25 Suction port Pressure port Suction port Pressure port 2.31± (58.7±0.2) 1.16 (29.35) 1.19± (30.2±0.2) 0.59 (15.1) 1.26 (32) 1.87± (47.6±0.2) 0.94 (23.8) M10x15 +? deep Tightening torque: 35 lb-ft +3.7 (49 +5 Nm) 0.79 (20) 0.87± (22.2±0.2) 0.44 (11.1) 1.53± (38.9±0.2) M8x12+1 Tightening torque: 18 lb-ft +3.7 (25 +5 Nm) 1.53± (38.9±0.2) ø 2.17 (55) 1.02 (26)±0.315 (0.8) M6 x 12+1 Tightening torque: 7.3 lb-ft +1.5 (10 +2 Nm) 0.98 (24.8) 0.97 (24.8) ø1.38 (35) 0.47 (12) 4

5 Ordering code 1 PF 2 G P 3 3X R H V E4 * Model High pressure pump = P Size Size 3 = 3 Series Series 30 to 39 (30 to 39, externally interchangeable) = 3X Size Size Displacement in 3 (20.6 cm 3 ) = in 3 (22.2 cm 3 ) = in 3 (25.4 cm 3 ) = in 3 (32.5 cm 3 ) = ) Sizes 20, 22 and 25 2 ) Size 32 Ordering example: 1PF2GP3 3X/025RH20VE4 H = V = Further details in clear text Mounting flange with pilot E4 = 4-hole mounting flange to ISO 3019/2 and VDMA Part 1 FPM seals, suitable for HL-/ HLP mineral oil to DIN (Special hydraulic fluids on request Please refer to our specifications in data sheet RA Suction and pressure port 20 1 ) = Square flange connection to DIN 3901/3902 metric mounting bolt 07 2 ) = SAE mounting flange Shaft models Parallel shaft, Ø 0.98 (25 mm) R = Direction of rotation (viewed on shaft end) clockwise 5

6 Installation notes Drive Electric motor + bellhousing + coupling + pump Oil tanks Usable volume of the tank must correspond to operating conditions. Warning! The published maximum fluid temperature must not be exceeded A cooler may be required. Warning! No radial and axial forces are permitted upon pump drive shaft! Motor and pump must be correctly aligned! Always use a coupling that can accomodate the shaft end play! When installing the coupling, avoid axial forces. Do not hammer or press coupling onto shaft. Use the thread provided at shaft end to draw coupling onto shaft! Pipes and Connections Remove protective caps from the pump We recommend the use of seamless precision steel tube to DIN 2391 with appropriate tubing fittings The inside diameter of the pipes should be correctly selected to maintain acceptable fluid velocities Suction velocity ft/s (1-1.5 m/s) For inlet pressure, see page 2 Carefully clean all pipes and fittings before assembly Suggested plumbing arrangements Leakage line 1;2 Suction line min 2 (50) Installation positions Optional B3 min 2 (50) min 8 (200) lowest permissible fluid level min 4 (100) B5 V1 Under no circumstances may return oil be drawn immediately back into the pump, i.e. maintain the greatest possible distance between the suction and return line. Always insure that the return line extendeds below the minimum oil level. Always insure that plumbing is leak proof under vacuum conditions. Filtration Whenever possible, use pressure or return line filters. (Suction filters are not recommended; however, if applied, use in combination with vacuum switches and clogging indicators). Fluids Please observe the specifications in RA We recommend good quality mineral oils. Various types of oils may not be mixed, as this may lead to fluid degradation and a reduction in lubricity. Dependent upon operating conditions, the fluid must be replaced at certain intervals. It is therefore necessary to clean out the tank at this time. 6

7 Commissioning notes Start-up Check to ensure that the installation is correctly assembled. Fill the system with fluid via a filter with the proper rating. Check direction of rotation of the pump(s). Start the pump unloaded, and allow to run for several seconds without load to insure sufficient lubrication. Never let the pump run without oil. Should the pump continue to run with bubbles after about 20 seconds, the installation must be re-checked. While the pressure is building to system value, check all pipe connections for leaks. Check the operating temperature. Bleeding Before start-up, we recommend that the pump casing be primed with fluid. This increases operation reliability and reduces wear due to poor installation conditions. On first start-up, careful cracking of the outlet flange with the pump unloaded will permit entrained air to escape. The connection should be re-tightened when the oil is free of bubbles. General All pumps are functionally tested prior to shipment. No alteration of any kind may be made to the pump. If any alteration is made, no guarantee is provided. Repairs may only be carried out by the manufacturer or an approved agent or subsidiary. Repair and maintenance carried out by third parties is not guaranteed. Important notes Assembly, maintenance and repair of pumps may only be carried out by authorised personnel! Pumps may only be operated within the permissible parameters (see page 2)! Pumps may only be operated under proper conditions! When working on the pump, make sure that the system pressure is zero. Unauthorised conversions and changes which affect the reliability and function of the pump are not permitted! Protective devices ( coupling guards) must be fitted and not removed, except for servicing! Always check that mounting bolts are properly seated and properly torqued. General safety and accident prevention regulations must be observed at all times! Project notes For comprehensive notes and suggestions, see Hydraulic Trainer, Volume 3 (RE ) Planning Hydraulic Systems. If internal gear pumps are being used, we recommend that particular attention is paid to the following items. Pump sizes All nominal sizes are dependent upon manufacturing tolerances and only apply within certain limiting conditions. Please note that a certain variation is therefore possible and variations can also occur under certain conditions ( e.g. viscosity). Operating curves When specifying the drive motor please note the maximum application data in the operating curves on page 3. With internal gear pumps, the pulsation influence to valves, pipes and machine components is very small due to the low flow pulsation (approx. 2-3%), from internal gear design. In spite of this, incorrect installation conditions can raise the noise level on the power unit some 5 to 10 db(a) higher than that for the pump itself. Combination pumps Internal gear pumps Model GF may be combined to provide multiple pumps (GF3/3 and GF3/2). However, the through-drive torque (see page 10) may not be exceeded, and it must be noted that the fluid in the two pumps is not separated by a shaft seal. Warning! This means that the pumps may not be used with varying fluids. Noise The noise values shown on page 3 are measured according to DIN , page 26. This means that only the noise emission of the pump is taken into consideration. Ambient influences (installation conditions, piping etc.) are not considered. These values apply only to a single pump. 7

8 Notes Mannesmann Rexroth Corporation Rexroth Hydraulics Div., Industrial, 2315 City Line Road, Bethlehem, PA Tel. (610) Fax: (610) Rexroth Hydraulics Div., Mobile, 1700 Old Mansfield Road, Wooster, OH Tel. (330) Fax: (330) All rights reserved Subject to revision Printed in U.S.A.