Single stage marine Gearboxes. Marine propulsion HSU/HSN

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1 Marine propulsion HSU/HSN

2 HSU/HSN SERIES Features Compact design HSU Series with parallel vertically arranged shafts HSN Series with parallel horizontally arranged shafts Case-hardened and ground gearing Conservatively dimensioned plain bearings and accessories Aperture for inspection of thrust bearing tilting pads (German and foreign patents) High rigidity of housing owing to One-piece centre section of housing (HSU series) One-piece housing cover (HSN series) Approved by all classification societies Easy to service and maintain Optimal cost/performance ratio Models with shaft centres from 500 to 1,400mm Optional features:»» Power Take-off (PTO) drives»» Condition monitoring»» Propeller pitch control access»» Clutch 2

3 Single stage marine gearboxes with parallel, vertically arranged shafts (HSU) Single stage marine gearboxes with parallel, horizontally arranged shafts (HSN) Gear design The gear is of single stage type for drive by diesel engine via a flexible coupling or electric motor drive. Housing Grey cast-iron. The oil sump is integrally cast. Also available with nodular cast-iron, cast steel or welded housings. The base of the housing can be adapted to the ship s structure. Owing to the torsionally rigid construction, with strong internal ribs, elevated temperatures cannot impair the accuracy of tooth engagement. Special care has been taken to minimise vibrations and to avoid resonant surfaces. Bearings All shafts are supported by serviceable plain bearings conforming to DIN The bonding power of the white metal with the supporting shells of low-carbon steel attains values up to the tensile strength of the white metal. All bearings are lubricated and cooled with fresh oil. They operate within the hydrodynamic lubrication range. Thrust bearings Michel thrust bearings form integral parts of the gear unit. The bearing shoes for forward travel can be inspected and replaced through a patented aperture. To replace the shoes for reverse travel it is necessary to remove the thrust bearing cover. The thrust bearing chamber is permanently filled with oil, even if the oil supply system is not in operation. Gearing system All gear-wheels and gear rims consist of highly wearresistant case-hardened alloy steels. The involute helical gearing with optimal computer-controlled addendum modification in accordance with the latest scientific findings is case-hardened and ground. Owing to its high capacity it has been possible to achieve compact, low-weight gear unit designs. Cooling and filtration Achieved with the aid of a sea water proof oil cooler mounted on the gearbox housing and a separate double filter with a secondary magnetic filtration system. The cooler uses sea water with temperatures up to 32 C. Higher cooling water temperatures and coolers for brackish water or fresh water are available on request. Tubing Complete tubing to connect the attached pump, the oil cooler, the double filter and the appropriate fittings with all gear connection points are provided. The internal suction and spray tubes have outer flanges and can be checked without dismantling the gear unit. The suction tube fitting for the pump is provided above the bottom of the gear unit, in a readily accessible position. The line leading to the starting and standby pump and the cooling water supply lines are not included with the gear unit. Gearbox input shaft With cylindrical stub shaft, the length of which is adapted to the coupling. If required, input shafts can be supplied for flange mounting or with an air hole for connection to a clutch. 3 Gearbox output shaft Supplied with a flange, the diameter of which depends on the gear size and can, on request, be enlarged. A borehole for taking control linkage for controllable pitch propeller can also be added, together with possibility of mounting the adjustment box alternatively oil supply box. Protection of gearbox Outer coat RAL 9005 or Inner coat 13 AL 3000, fire red. Internal protection by oil used in testing. Instruments and valves 1 thermometer before double filter 1 thermometer after cooler 1 pressure gauge before double filter 1 pressure gauge after cooler 1 non-return valve after integral pump 1 check valve after external pump 1 pressure relief valve before double filter 1 suction valve on suction tube of external pump We are prepared to provide the gear units with all transducer instruments required for operation in accordance with the regulations of the relevant classification societies. Other instruments and fittings can also be provided as required. Spare parts for coastal- or ocean-going vessels in accordance with the regulations of the classification societies and the table below. Secondary PTO systems are available on request.

4 Spare parts per ship Classification GL LRS NV BV ABS RINA DSRK Class of navigation A B A B A B A B A B A B A B 1 radial bearing or each type installed X X X X X X X X 1 shoe-type thrust bearing ring X X X X X X X X X X X X Standby pump with electric motor* X X X X X X X X X X X X X X *for each gearbox A: Ocean-going B: Coastal Single stage marine gearboxes with parallel, vertically arranged shafts (HSU) Sectional arrangement drawing The single stage HSN marine gearbox with shafts arranged horizontally is of identical construction with respect to the gear assembly. Possibility of adapting the gearbox housings for the regulation or flow of oil. (See page 3 for description) 4

5 HSU/HSN single stage marine gearboxes with parallel, vertically and horizontally arranged shafts Selection diagram No E (See next page for example of selection) OUTPUT POWER A GEAR RATIO i 5

6 HSU/HSN single stage marine gearboxes with parallel, vertically and horizontally arranged shafts Continuous propeller thrust for ahead and astern travel Type range A-B Gear size Propeller thrust KN A B Above a certain operating speed higher propeller thrusts can be achieved kn = 1 t Type range C-D Example of selection Engine power Engine speed Propeller speed P = 310 kw n 1 = 570 rpm n 2 = 195 rpm Continuous propeller thrust required = 800 kn For acceptance by: Germanischer Lloyd without ice class f 1 * = 1 A = f 1 = 1 = 10,53 Gear size Propeller thrust KN C D Above a certain operating speed higher propeller thrusts can be achieved kn = 1 t i = = = 2,92 Result Gearbox Size 800 Type range AB Type B for 800 kn thrust selected in accordance with the above table. *f 1 factor for gear units not suitable for navigation in ice always 1. *f 1 factor for gear units suitable for navigation in ice. 6

7 HSU single stage marine gearboxes with vertically arranged shafts Type range A-B Dimension table No E The right to modify the dimensions is reserved. 1) For gearbox selection see diagram No E 2) The input shaft is adapted to suit the coupling. Flange on request 3) Selection of output shaft according to propeller thrust requirements (see page 6) Housing Input Ratio 2 and output 3 shaft Type HSU Weight Range Type A Type B Size 1 (kg) i A B C G H J K L M O P d 1 E 1 d 2 E 2 D E 3 D E

8 HSU single stage marine gearboxes with vertically arranged shafts Type range C-D Dimension table No E The right to modify the dimensions is reserved. 1) For gearbox selection see diagram No E 2) The input shaft is adapted to suit the coupling. Flange on request 3) Selection of output shaft according to propeller thrust requirements (see page 6) Type HSU Size Ratio Range i Housing Input 2 and output 3 shaft A B C G H J K L M O P d 1 E 1 d 2 E 2 D E 3 D E 3 1,5-3, >3, ,5-3, >3, ,5-3, >3, ,5-3, >3, ,5-3, >3, ,5-3, >3, ,5-3, >3, ,5-3, >3, ,5-4, >4, , > Type C Type D Weight (kg) 8

9 HSN single stage marine gearboxes with horizontally arranged shafts Type range A-B Dimension table No E The right to modify the dimensions is reserved. 1) For gearbox selection see diagram No E 2) The input shaft is adapted to suit the coupling. Flange on request 3) Selection of output shaft according to propeller thrust requirements (see page 6) Right-handed design Left-handed design Housing Input Ratio 2 and output 3 shaft Type HSN Weight Range Type A Type B Size 1 (kg) i A B C G H J K L M O P R d 1 E 1 d 2 E 2 D E 3 D E , , , , , , , , , ,

10 HSN single stage marine gearboxes with horizontally arranged shafts Type range C-D Dimension table No E The right to modify the dimensions is reserved. 1) For gearbox selection see diagram No E 2) The input shaft is adapted to suit the coupling. Flange on request 3) Selection of output shaft according to propeller thrust requirements (see page 6) Right-handed design Left-handed design Housing Input Ratio 2 and output 3 shaft Type HSN Weight Range Type A Type B Size 1 (kg) i A B C G H J K L M N O P R d 1 E 1 d 2 E 2 D E 3 D E , , , , ,

11 HSU/HSN single stage marine gearboxes Types with secondary auxiliary output drives 1. Standard design - series Z a F: Can be swivelled by 180 when mounted on type HSU 2. Standard design series Z a F: Can be swivelled by 90 when mounted on type HSN 3. Special design: 1 built-on transfer box with 2 output drives, with transmissions for generators or pumps 4. Special design: 1 built-in output drive when greater distance is necessary between gear drive shaft and PTO-shaft 11

12 HSU/HSN single stage marine gearboxes Types with secondary auxiliary output drives (PTO) - series Z a F OUTPUT POWER A GEAR RATIO i 12

13 HSU/HSN Single stage marine gearboxes Types with secondary auxiliary output drives (PTO) - series Z a F Example of selection Generator drive Generator output P = 420 kw (kva) Generator speed n 3 = 1500 rpm Engine speed n 1 = 620 rpm Continuous propeller thrust required = 800 kn For acceptance by: Germanischer Lloyd without ice class f 1 * = 1 A = = = 0,28 Dimension table Z a F Size Dimensions a H e d Weight approx. (kg) Minimum centre between shafts HSU and HSN i = = = 2,42 Result Gearbox Z a F 280 Dimension E 1 from tables of dimensions No. 2500, 2505, 2501 and

14 HSU/HSN single stage marine gearboxes Lubrication and cooling Double filter Oil cooler Integral geared oil pump Cooling water Check valve Check valve Suction valve Pressure valve Free-standing starting and reserve pump The integral gear pump normally supplies the gearing and the bearings with oil. The system is so designed as to ensure that sufficient oil is supplied even if the engine idles. Drive is via pump gearing and gearbox input shaft. The independent pump, driven by an electric motor, is used to start the gearbox and as a reserve pump A suction filter valve on the suction line of the integral pump ensures that the lines are always filled with oil even when the system is inoperative. Before it reaches the cooler the oil is cleaned by a double filter with a secondary magnetic filtration system. The double filter is readily accessible and can be cleaned even while the gear unit is in operation. A pressure relief valve in the line leading to the double filter ensures that the lubricating oil pressure cannot rise above a certain value. The integral gear pump and the free standing starting and reserve pump are separated by means of check valves. The integral pump, the oil cooler, the double filter and the appropriate fittings are connected by tubes to all gearbox connection points. The internal suction and spray lines have outer flanges and can be checked without dismantling the gear unit. The suction tube connection for the integral pump is located just above the bottom of the gear unit, in a readily accessible position. 14 We supply all connecting lines, shown in the diagram by full and chain-dotted lines, but not the suction and pressure oil fittings for the starting and reserve pump. One thermometer and one pressure gauge are provided both upstream of the double filter and behind the oil cooler so as to enable visual monitoring of the oil pressure and temperature. We are prepared to provide the gear units with any monitoring instrument required for maintenancefree operation according to the regulations of the classification society concerned. Other instruments and sensors can also be installed, if required.

15 Thrust bearings Aperture for inspection of thrust bearings (German and foreign patents) Types HSU/HSN With the Gamesa Gearbox marine-gears series HSU/ HSN the propeller thrust block is fully integrated with the gear unit housing thus contributing to the exceptional rigidity and strength of the housing. In conjunction with our one-flange tilting pad thrust bearing (system Michell) the system ensures a high degree of safety and reliability. Thanks to continuous oil lubrication during operation the bearing works perfectly in both directions of rotation. The oil supply and discharge system is so designed that the housing of the thrust bearing remains filled with oil even if the oil supply system is inoperative. Our special aperture for inspection of the thrust bearing permits rapid, easy removal of the thrust bearing pads for ahead travel. The design and construction features of this mechanism have been patented by TACKE. Its mode of operation and its main characteristics can be seen in the above drawing. The main advantage of this system consists in the ready accessibility of the pads, a point of great importance for inspection and servicing. This is a time and cost saving arrangement since it is unnecessary to remove the housing cover. All models of series HSU/HSN are equipped with this system. The thrust bearings shoes for ahead travel can be removed as follows: The cover of the inspection aperture has a retaining element on the inside, which holds the pads in position and keeps them from turning. Removal of the cover exposes the first pad, which can be withdrawn for inspection. The remaining pads can be removed only 15 with the aid of a tappet, which is supplied together with the gear unit. A thread hole is provided in the periphery of the flange to enable the tappet retaining screw to be fitted. By turning the shaft the remaining shoes can be moved one by one into the aperture and then withdrawn. The procedure is reversed when it comes to reassembling the pads. At this stage the tappet helps to position each pad. The pad with the retaining pin should be fitted last. When the aperture is closed this pin must engage the retaining element on the inside of the cover in order to secure the entire set of pads. The pads for astern travel, which are used relatively rarely, can be inspected after removal of the two-part thrust bearing cover.

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17 Elevate the tradition La tradición de la industria naval en la fachada atlántica ha dejado históricamente su huella en toda la geografía peninsular, colocando a Bilbao y a Gamesa gearbox en el epicentro del desarrollo marítimo del último siglo gearbox fabricados 1+ millón CV de potencia Portfolio hasta 12k CV Nuestra tradición industrial ligada al mar nos ha permitido fabricar gearboxes que propulsan con orgullo a día de hoy a más de 300 buques en un sector de alto valor añadido. En Gamesa Gearbox disponemos de un equipo con la experiencia transmitida de generación en generación de una mano de obra especializada y cualificada para alcanzar la excelencia en el diseño y fabricación de gearboxes para propulsión marina. 17

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