REXROTH R902197563 A2FE63/61W-VZL100-S

R902197563 A2FE63/61W-VZL100-S
REXROTH,Bent-Axis
Axial Piston - Fixed Displacement Motor

R902197563 A2FE63/61W-VZL100-S

REXROTH,Bent-Axis

Axial Piston - Fixed Displacement Motor

Table of values

Size				28	32	107	125	160	180	250	355
Displacement geometric, per revolution		Vg	cm³	28.1	32	106.7	125	160.4	180	250	355
Nominal pressure		pnom	bar	400	400	400	400	400	400	350	350
Maximum pressure		pmax	bar	450	450	450	450	450	450	400	400
Maximum speed		nnom 1)	rpm	6300	6300	4000	4000	3600	3600	2700	2240
Maximum speed		nmax 2)	rpm	6900	6900	4400	4400	4000	4000
Inlet flow 3)	at nnom	qV	l/min	177	202	427	500	577	648	675	795
Torque 4)	at pnom	M	Nm	179	204	679	796	1021	1146	1393	1978
Rotary stiffness		c	kNm/rad	2.93	3.12	11.2	11.9	17.4	18.2	73.1	96.1
Moment of inertia for rotary group		JTW	kg·m²	0.0012	0.0012	0.0116	0.0116	0.022	0.022	0.061	0.102
Maximum angular acceleration		ɑ	rad/s²	6500	6500	4500	4500	3500	3500	10000	8300
Case volume		V	l	0.2	0.2	0.8	0.8	1.1	1.1	2.5	3.5
Weight (approx.)		m	kg	10.5	10.5	34	36	47	48	82	110

1)	These values are valid at: - for the optimum viscosity range from vopt = 36 to 16 mm2/s - with hydraulic fluid based on mineral oils
2)	Intermittent maximum speed: overspeed for unload and overhauling processest, t < 5 s and Δp < 150 bar
3)	Restriction of input flow with counterbalance valve
4)	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 found in data sheet 90261.

Speed range

No limit to minimum speed nmin. If uniformity of motion is required, speed nmin must not be less than 50 rpm.

Determining the operating characteristics
Inlet flow		[l/min]
Rotational speed		[rpm]
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 seal	Temperature1)	Comment
Cold start	νmax ≤ 1600 mm²/s	NBR2)	&thetasym;St ≥ -40 °C	t ≤ 3 min, without load (p ≤ 50 bar), n ≤ 1000 rpm, permissible temperature difference between axial piston unit and hydraulic fluid max. 25 K
Cold start	νmax ≤ 1600 mm²/s	FKM	&thetasym;St ≥ -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)	&thetasym; ≤ +78 °C	measured at port T
	ν = 10 … 400 mm²/s3)	FKM	&thetasym; ≤ +103 °C	measured at port T
	νopt = 16 … 36 mm²/s			range of optimum operating viscosity and efficiency
Short-term operation	νmin = 7 … 10 mm²/s	NBR2)	&thetasym; ≤ +78 °C	t ≤ 3 min, p ≤ 0.3 • pnom measured at port T
Short-term operation	νmin = 7 … 10 mm²/s	FKM	&thetasym; ≤ +103 °C	t ≤ 3 min, p ≤ 0.3 • pnom measured at port T

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)

Note

To reduce high temperature of the hydraulic fluid in the axial piston unit we recommend the use of a flushing and boost pressure valve (see chapter Extended functions and versions).

Selection of hydraulic fluid

Bosch Rexroth evaluates hydraulic fluids on the basis of the Fluid Rating according to the technical data sheet 90235.

Hydraulic fluids with positive evaluation in the Fluid Rating are provided in the following technical data sheet:

90245: Bosch Rexroth Fluid Rating List for Rexroth hydraulic components (pumps and motors)

The hydraulic fluid should be selected so that the operating viscosity in the operating temperature range is within the optimum range (νopt; 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.
Minimum pressure at inlet (pump operating mode)	pE min	see diagram	To prevent damage to the axial piston motor in pump mode (change of high-pressure side with unchanged direction of rotation, e.g. when braking),a minimum pressure must be guaranteed at the working port (inlet). The minimum pressure depends on the rotational speed and displacement of the axial piston unit.
Total pressure	pSu	700 bar	The summation pressure is the sum of the pressures at both work ports (A and B).
Rate of pressure change			Definition
with integrated pressure relief valve	RA max	9000 bar/s	Maximum permissible rate of pressure build-up and reduction during a pressure change over the entire pressure range.
without pressure relief valve	RA max	16000 bar/s
Case pressure at port T			Definition
Continuous differential pressure	ΔpT cont	2 bar	Maximum averaged differential pressure at the shaft seal (case to ambient)
Pressure peaks	pT peak	10 bar	t < 0.1 s

Note

Working pressure range valid when using hydraulic fluids based on mineral oils. Values for other hydraulic fluids, please contact us.

Minimum pressure at inlet (pump operating mode)

This diagram is only valid for the optimum viscosity range of vopt = 16 to 36 mm2/sec..

If the above mentioned conditions cannot be ensured, please contact us.

Pressure definition

1)	Total operating period = t1 + t2 + ... + tn

Rate of pressure change

Maximum differential pressure at the shaft seal

Note

The service life of the shaft seal is influenced by the speed of the axial piston unit and the case pressure. The service life decreases with an increase of the mean differential pressure between the case and the ambient pressure and with a higher frequency of pressure spikes. The case pressure must be equal to or higher than the ambient pressure.

Direction of flow

Direction of rotation, viewed on drive shaft
clockwise	counter-clockwise
A to B	B to A

Permissible radial and axial forces of the drive shaft

Size
Drive shaft		Code
		⌀
Maximum radial force at distance a (from shaft collar)		Fq max
		a
Permitted torque at Fq max		Tq max
Permitted differential pressure at Fq max		Δpq max
Maximum axial force, when standstill or in non-pressurized conditions		+ Fax max
		- Fax max
Maximum axial force, per bar operating pressure		+ Fax max

General instructions

The values given are maximum values and do not apply to continuous operation. The axial force in direction −Fax is to be avoided as the service life of the bearing is reduced. Special requirements apply in the case of belt drives. Please contact us.

Notes for sizes 250 ... 355:

In case of radial forces limited performance data is valid. Please contact us. In case of axial forces during operation of the unit please contact us.

Effect of radial force Fq on the service life of bearings

By selecting a suitable direction of radial force Fq the load on the bearings caused by the internal rotary group forces can be reduced, thus optimizing the service life of the bearings. Recommended position of mating gear is dependent on direction of rotation. Examples:

Toothed gear drive, size 28 … 180

Toothed gear drive, size 250 … 355

1	Direction of rotation "counter-clockwise", pressure at port B
2	Direction of rotation "clockwise", pressure at port A
3	Direction of rotation "bidirectional"

Long-Life bearing

Sizes 250 and 355

For long service life and use with HF hydraulic fluids. Identical external dimensions as version with standard bearings. Subsequent conversion to long-life bearings is possible.

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REXROTH R902197563 A2FE63/61W-VZL100-S

R902197563 A2FE63/61W-VZL100-S

REXROTH,Bent-Axis

Table of values