7 семестр (Бормотов А) / 1man_bw_l23_30_chn_23_30_instruktsiya_po_ekspluatatsii_1 / MAN-BW L23-30h project-guide

1613539-9.4 Page 1 (3)

Installation aspects

For mounting of diesel engine and alternator on a common base frame, the alternator supplier should fullfill the dimensions given in fig. 1. Further, inspection shutters, components and other parts to be operated/ maintained should not be placed below the level of the alternator feet on front edge of, and in the longitudinal direction of the alternator in the area covered by the base frame.

Regarding air cooled alternators, the ventilating outlet should be placed above the level of the alternator feet.

For water cooled alternators the flanges for cooling water should be placed on the left side of the alternator seen from the shaft end. The flanges should be with counter flanges.

Project Information

3 sets of Project Information should be forwarded to MAN - B&W Diesel A/S, Holeby, according to the delivery times stated in "Extent of Delivery".

Drawings included in the alternator Project Information must have a max. size of A3.

1613539-9.4 Page 2 (3)

Project Information should as a minimum contain the following documentation:

c. For air cooled alternators following information is required:

Following information is required in order to be able to work out drawings for base frame and general arrangement of GenSet.

Side view and view of driving end with all main dimensions, i.e. length, width, height, foot position, foot width, shaft height, etc. as well as all the dimensions of the alternator's coupling flange, alt. groove shaft pin.

As minimum all the dimensions in fig. 1 should be stated.

Further the "outline" drawing is to include alternator type, total weight with placement of center of gravity in 2 directions (horizontal and vertical), direction of revolution, terminal box position, lifting eyes venthole position for air cooled alternators and min. overhaul space for rotor, cooler, filter, etc.

a. For water cooled alternators following information is required:

-position of connections

-dimension of connections

-dimensions of flange connections

-cooling water capacity

-cooling water temperature

-heat dissipation

-cooling water pressure loss across heat exchanger

-Amount of water in alt. cooling system

b. For alternators with extern lubricating of bearing(s) following information is required:

-position of connections

-dimensions of connections

-dimensions of flange connections

-required lub. oil flow

-required lub. oil pressure

-pressure regulator (if required/delivered)

-oil sight glas (if required/delivered)

Following information is required in order to be able to workouttorsionalvibrationcalculationsforthecomplete GenSet.

The rotor shaft drawing must show all the dimensions of the rotor shaft's lengths and diameters as well as information about rotor parts with regard to mass inertia moment - GD2 or J (kgm2) and weight (kg).

Fig 2 Shaft dimension for alternator, type B16

1613539-9.4 Page 3 (3)

The following components, which are part of the complete rotor, must be mentioned:

-Shaft

-Pole wheel

-Exciter

-Ventilator

The shaft dimensions for alternator should be according to figure 2 or 3.

Fig. 3. Shaft dimension for alternator, type B20

4. Other drawings necessary for installation.

5. Spare parts list.

6. List of loose supplied components.

7. Data:

-Construction form.

-Rated voltage.

-Rated power kVA.

-Rated current, amp.

-Rated power factor.

-Frequency, Hz.

-Insulation class.

-Load efficiency in % of nominal load at 1/4 - 1/2 - 3/4 - 1/1 load (with cos.phi. = 0.8 and 1.0).

-If the alternator bearings are lubricated by the engines' intermal lub. oil system:

-Max. lub. oil pressure.

-Lub. oil capacity (m3/h).

-Heat radiation.

Besides the above-mentioned documentation, 3 sets of alternator test reports should be forwarded.

In connection with the delivery of alternator, documentation and spare parts, these should be specified with our order no. and the specific yard or project identification.

For further information, please contact MAN B&W Diesel A/S, Holeby.

1613561-3.5 Page 1 (1)

L23/30H

Alternator type B 16:

One bearing type, shaft end with flange.

Alternator type B 20:

Two bearing types, shaft end with keyway. One bearing shall be of the guide bearing type.

Note for Re-engineering

In case of using an existing alternator, calculation for torsional vibrations has to be carried out before determination concerning intermediate bearing and elastic coupling can be established.