1PH7/1PH4 servomotors with 2-speed gearboxes (asynchronous) производства Siemens

The performance characteristics of the two-speed gearboxes for 1PH7/1PH4 motors are as follows:

• Drive power up to 100 kW (134 HP)
• Constant power range at drive shaft up to 1:24
• Suitable for both directions of rotation
• Motor shaft heights SH 100 to SH 225
• Types of construction IM B35 and IM V15 (IM V35 available on request)

Mounting the change-speed gearbox outside the headstock of the machine tool has the following advantages:

• Easy adaptation to the machine tool
• Low noise and no temperature fluctuations due to gearing inside the headstock
• Separate lubrication systems for the main spindle (grease) and the change-speed gearbox (oil)
• Gearbox efficiency > 95 %
• Instead of V belts, the drive power can also be transmitted from the gear output by a gear wheel (available on request) or coaxially by means of a flexible coupling.

For further binding technical specifications and configuring aid (e.g. lubrication, temperature rise and typical applications), please refer to the latest catalog supplied by ZF (Zahnradfabrik Friedrichshafen). The permissible characteristics of the motor and gearbox are a governing factor in the design of the complete drive unit (motor and gearbox).With 1PH4168 or 1PH7167-2NB motors, for example, the rated torque must be reduced to 300  Nm (221 lb_ƒ-ft). With motors of SH132, please note that the maximum permissible speed of the 2K 250 gearbox for splash lubrication is 6300 rpm.

¹⁾ Higher drive speeds are allowed with oil-cooled gearboxes and for gear ratios I = 1 in some instances (refer to the ZF Catalog).

²⁾ Special versions, such as gearboxes with different torsional backlash, or other gear ratios (I = 3.17 or I = 5.5), are available on request.

Profile of a planetary gearbox

The two-speed gearboxes have a planetary design. The central sun wheel distributes the power to several planet wheels which revolve around it. The outstanding advantage of this design is its compactness. The gear-changing device, a splined sleeve that moves axially, is of form-fit design.

Position 1: Gear ratio i₁ = 4
Position 2: Gear ratio i₂ = 1

The motor is flange-mounted onto the change-speed gearbox using an adapter plate. The AC motor must be suitably prepared for mounting.

For shaft heights of SH 160 and higher, motors of types of construction IM B35 and IM V15 must be supported free from stress on the non-drive end.

Any transverse force imported into the gearbox has to be borne by the gearbox and transmitted to the machine base.

The motors for all 2K gearboxes must be full-key balanced with a fitted key. The 2K 120, 2K 250, 2K 300 gearboxes are enclosed, so that the motor flange is adequately sealed in the standard version.

Vertical mounting positions for the IM V15 and IM V35 require circulating-oil lubrication of the gearboxes.

The standard version of the change-speed gearboxes up to and including the 2K 300 has a maximum circumferential backlash of 30 angular minutes (measured at the gear output). Several special versions suitable for milling or machining with cut interruption can be supplied on request:

• Reduced backlash with special features: max. 20'
• Reduced backlash for high performance: max. 15'

The power unit (motor and gearbox) is supplied with vibration magnitude grade R in accordance with EN 60034-14 (IEC 60034-14). This is also the case when the motor is ordered with vibration magnitude grade S.

The belt pulley¹⁾ should be a cup wheel type pulley. For mounting the belt pulley, the output shaft on the gearbox has a flange with an external centering spigot and tapped holes for easy fitting and removal of the pulley.

Motors with built-on planetary gearbox

The 1PH motors can also be supplied with flange-mounted planetary gearboxes. The motor-gearbox unit is tested for correct functioning. The complete drive unit - that is, 1PH7 or 1PH4 motor with mounted ZF change-speed gearbox - can be ordered directly from Siemens:

Siemens AG

Industrial Solutions and Services
Contact: Mr. Britz

Im Schiffelland 10
66386 ST. INGBERT
Germany

Fax: +49 6894 891-112
E-mail: hans-peter.britz@siemens.com

The following details must be specified with the order:

Ordering example for 1PH4 motor:

Motor complete with gearbox
1PH4133-4NF26-Z
K00
2LG4315-3FD11

Ordering example for 1PH7 motor:

Motor complete with gearbox
1PH7186-2NE03-0BC2
2LG4260-1JC21
1PH7163-2NF03-0CC0
2LG4320-3JD11

¹⁾ Not included in scope of supply.

The use of a gearbox permits the constant power band to be increased significantly.

Power-speed graph

Legend:
n_rated      Rated speed
n_rated'      Rated speed with two-stage gearbox
n_max       Max. permissible speed
P_rated      Rated power and constant power of the motor in the speed range between n_rated and n_max or n_rated' and n_max

M          Torque

Please direct your questions on gears directly to:

ZF Maschinenantriebe GmbH

88015 FRIEDRICHSHAFEN
GERMANY

Phone: +49 (0) 7541 773246
Fax: +49 (0) 7541 773470

Additional information is available in the Internet under:

http://www.zf.com