HAMMELMANN HDP 502 / S 1100-50, Руководство по эксплуатации, Страница: 299 / 311

Zentralschmiertechnik
BAIER + KÖPPEL
K 3000.1091.1 GB
D--91253 Pegnitz -- Postfach 1320 -- Telefon 09241/729--0 -- FAX 09241/72950
Instructions for use and maintenance
Gear pumps
Taking the unit into operation
Installation
The gear pump may be installed in vertical as well as in horizontal position. Angular bases and pump sup-
ports required for that purposeare available. For direct---drive operation the pump is equipped with an ela-
stic clutch. Belt and cogwheel drive assemblies as well as axial loads to the shaft are not acceptable. When
installing the pump, the piping assembly connected to it has to be taken into account. Tensions due to incor-
rectly installed tubes or to misalignment of the drive motor should be avoided. Any misalignment of the shaft
should not exceed 0,2 mm. Even if some manufacturers of drive clutches state that a greater misalignment
can be compensated by the clutch, the restoring force of the clutch generates some radial load on the shafts
to be connected, and this may result in damages to the pump. Impacts on the shaft end are not acceptable
at all, as they might result in serious damage to the pump.
Piping assemblies
When designing the size of a piping assembly, at has to be made sure that the acceptable flow speeds will
not be exceeded. In the suction pipe, they should not exceed 1,5 m/sec., and in the pressure pipe they
should not exceed 5 m/sec. (for more details, please consult the manufacturer). Before installation, any
piping assembly should be cleaned carefully. The suction pipe has to be perfectly airproof, and it should
be arranged as straight as possible, its end always being placed a few centimeters below of the minimum
oil level in the tank. The maximum suction lift should be restricted to a maximum of approx. 1 m. For the
piping assembly seamless precision steel tubes as per DIN 2391 are recommended.
Range of viscosity
The range of viscosity at operation should be between 15 and 800 mm
2
/s, as per graph 1 attached hereto.
The range of use of an oil may be clarified by reading the table of viscosities and temperatures. To this effect,
two viscosity values --- for ex. for 20° and 50° C --- must be entered into the graph. The point of intersection
of the straight line passing through these points, with the lines for maximum and minimum viscosity, indica-
tes the temperature limits of the oil concerned.
Attention: mind lubricant recommendation of manufacturer!
Oil quantity --- Oil temperature
The oil quantity required in the storage tank depends on the conditions of operation. In case of intermittent
operation, a quantity will be satisfactory which corresponds to two times the total flow rate per minute of
the pump. For continous operation, a quantity of oil of 3 or 4 times that reserve has to be provided. The
service temperature should be in the range from ---10° to +80° C (refer to diagram 1). The ideal range of
temperature is from 30° up to 50° C. Under particular circumstances, installation of an oil cooler may be
required in order to keep the temperature within certain limits.
Filtration
It is recommended to install a filter having a maximum mesh size of 0,100 mm and magnetic separating
device. An additional suction filter with a mesh size of 0,100 up to 0,200 mm will protect the pump against
coarse dirt. It should be cleaned at regular intervals in order to prevent the suction vacuum pressure from
falling below the specified limits, as this might lead to damages by cavitation.
HAMMELMANN Code no.: 04.03235.0134