APM212
56Pages

APM212 Gear Motors, including Fan Drive Gear Motors Standard and Low Noise series

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External gear motors for general use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fan Drive Gear Motors for cooling systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External gear motors components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Example of typical sound pressure level recorded in a semi-anechoic...

General information External gear motors are widely used in modern hydraulic systems due to their high performance, long service life and low maintenance costs. With the new APM212 family, high operating pressures, excellent volumetric and mechanical efficiencies were achieved; moreover, for LN­series (Low Noise versions), definitely better acoustic performances were obtained. Different features of the new APM design were deeply analyzed and studied in order to get to the above mentioned results; primarily, engineering attention was focused on the design of the gear teeth and balancing...

1.2 Fan Drive Gear Motors for cooling systems In the Fan Drive Gear Motors for cooling systems we implemented the shaft seal protection adding a dedicated sealing. Consequently, dedicated cast iron front covers have been designed. See section 3.4.2 Dedicated front cover with additional dust protection Improve machine operating efficiency Allow to integrate hydraulic values circuit Reduce the costs of maintenance Electronic control available Reduce noise and vibrations Examples of typical applications Telehandler Large Wheel loader Hydraulic scheme examples

1.3 External gear motors components 1516 ID |To||TT| ii2| 1. Retaining ring 2. Shaft seal ring support 7. Balancing block 1.3.1 Improvements (New APM212 vs APM200) Front covers : In addition to aluminium versions, complete new range of cast iron front covers Balancing blocks : New generation optimised and standardised balancing blocks Gears : New gears profile (12 teeth) and increased transmissible torque Bodies: New design pump bodies 8. Take off power gear 14. Fixing screw and washer Back covers : Wide range of aluminium and cast iron back covers with/ without integrated cartridge...

12 = number of new optimised teeth H = 15-18-21 APM212 optimised balancing area with higher performance materials APM212 Low Noise gear motor Pulsation reduced APM200 Standard gear motor 1.4 Example of typical sound pressure level recorded in a semi-anechoic testing room Noise reduction effects Oil temperature: 40°C - Oil viscosity: 32 mm2/s Distance between motor and sensor: 1 m

BUCHERhydraulics Features * Referred to motors with flanged ports. Utilising threaded ports, ** Obtained with a specific balancing plate please to consider a significantly de-rated performances. The mechanical stress localised on threaded ports cause a reduced motor life performances igg= IMPORTANT!: Please consult Bucher Hydraulics if even one of the operating limits indicated in the table (temperature, pressure, rpm) is exceeded, as well as in the case of two or more maximum values at the same time, or for applications with particularly heavy-duty cycles 1.6 High inlet pressure P (bar)...

1.7 Identifying the rotation direction The rotation direction of a gear motor is identified by looking at the motor from the front and with the drive gear turned upwards (see figures below). Motors with clockwise rotation (D) have a drive gear which turns clockwise, with the inlet port on the left and the outlet port on the right. Motors with counterclockwise rotation (S) have a drive gear which turns counterclockwise, with the inlet port on the right and the outlet port on the left. D Right-hand rotation The figure also shows the pressure flow inside the motors as the oil is transferred...

1.9 Radial and axial load 1.9.1 Standard version Bucher APM212 gear motors are suitable to work also when radial and axial loads are applied to it. In order to guarantee the correct life of the hydraulic motor, it is necessary to let the component work within the limits indicated in the table below: 1.9.2 Bearing front cover support High values of radial and axial loads can cause the wear of the motor internal components; as a consequence, motor performance and life can be dramatically reduced. Bucher Hydraulics studied special front covers having a bearing on-board which allow the motor to...

Limit indications: Shaft seal: Maximum pressure admitted IMPORTANT! The pressure on the outlet line has to be checked in order to choice the right motor configuration. Different solutions are available depending on pressure value recorded. See examples from 1 to 4 Pressure [bar] 10 8 These limits have 6 to be respected in 4 the worst working 2 conditions 0 Standard shaft seal Outlet pressure must be remain inside L area Bidirectional motor used in only one direction DRAIN Unidirectional motor with drain line (drain pressure must be remain inside L area) Standard shaft seal OUT OUT IN High...

1.11 General installation precaution In addition to the recommendations regarding fluids, filtration, coupling, etc., we suggest the following: - For unidirectional motors check always the rotation direction of the motor's take off shaft; it must be compatible with the rotation direction of the motor itself. - Be particularly careful in cleaning and make sure, when connecting the high and low pressure piping, that no chips, rag threads, teflon tape, etc. get into the motor circulation system. - Check the tightness of the high and low pressure fittings, the correct positioning of the O-Ring,...

1.12 Directives and standards - Atex: A Attention: The equipment and protective systems of this catalogue ARE NOT intended for use in po' tentially explosive atmospheres. Ref: Directive 99/92/EC and Directive 2014/34/UE - ISO 9001:2008 / ISO 14001:2004 Bucher Hydraulics S.p.A. is certified for research, development and production of directional control valves, power units, gear pumps and motors, electro pumps, cartridge valves and integrated manifolds for hydraulic applications. 1.13 Non-standard symbols used in the text Check nut Lock washer 11 ^ Dynamometric spanners Oh Hexagonal-head...