Section 1 General requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 11 Transmission Systems - Chapter 1 Gearing - Section 1 General requirements

Section 1 General requirements

Parent topic: Chapter 1 Gearing

1.1 Application

1.1.1 This Chapter is to be read in conjunction with the General Requirements for Machinery in Pt 9 General Requirements for Machinery.

1.1.2 The requirements of this Chapter, except where otherwise stated are applicable to electric motor, gas turbine and diesel engine gearing for driving:

  1. Conventional, totally submerged propeller(s)/impeller(s) for main propulsion purposes, for transmitted powers greater than 220 kW.

  2. Auxiliary machinery which is essential for the safety of the craft or for safety of persons on board where the transmitted powers exceed 110 kW.

Note Alternatively calculations using the methods defined in ISO 6336 – Calculation of load capacity of spur and helical gears will be considered.

1.1.3 Gear designs for applications other than those specified in Pt 11, Ch 1, 1.1 Application 1.1.2 will be specially considered.

1.1.4 In any mesh, the terms pinion and wheel refer to the smaller and larger gear respectively.

1.1.5 Bevel gears will be specially considered on the basis of a conversion to equivalent cylindrical gears.

1.1.6 For vibration and alignment requirements, see Pt 13 Shaft Vibration and Alignment.

1.2 Power ratings

1.2.1 In this Chapter where the dimensions of any particular components are determined from shaft power, P, in kW, and revolutions per minute, R, the values to be used are those defined in Pt 9 General Requirements for Machinery.

1.3 Inclination of craft

1.3.1 Main and auxiliary gear units are to operate satisfactorily under the conditions as shown in Table 1.4.1 Inclinations.

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