Electric gondola drive for vessel

 

The invention relates to marine electric propulsion. Electric gondola drive for the vessel contains videostacey made debouncetime, adapted to drive a gondola motor. The drive nacelle is installed on the bottom of the vessel through the hollow shaft. Moreover, funding is the motor heat is flowing the water through the surface of the drive gondolas, and through the heat-release surface of the barrel. In addition, tools to improve thermal conductivity and heat transfer. The invention allows for reliable cooling of the engine when it is used in tropical waters with high water temperatures under overload conditions, as well as the alignment of the temperature of the individual components of the engine, such as windshields parts of the winding. 6 C.p. f-crystals, 6 ill.

The invention relates to an electric gondola drive to the ship, which contains the electric motor, fitted to a streamlined water made debouncedelay drive the gondola, and the drive gondola through the hollow stem is located on the bottom of the vessel and being produced by the motor heat through the surface of the drive gondola has given flow around the requirements of the applicant, name: Siemens-Schottel-] (SSP) "electric gondola drive motor with excitation by permanent magnets," presented at the AES 97 - All Electric Ship (all-electric ship) 13 - 14.03.97, Paris. Publication of Siemens-Schottel-] (SSP) shows an electric gondola drive to ship with just poverhnostnoaguoe engine in the form of a synchronous motor with excitation by permanent magnets. This engine, details of which can be seen in Fig.1 of the publication, is completely sealed and requires no maintenance.

The objective of the invention is to specify a solution that allows you to have a reliable cooling of the engine when using electric gondola drive in tropical waters with high water temperatures under overload conditions. In addition, there should be lowered operating temperature of the electric motor and reached the necessary temperature of the individual components of the engine, such as windshields parts of the winding.

The problem is solved in principle due to the fact that heat through the heat-release surface is given in water as the drive from the gondola, so also through the barrel, and apply tools to improve thermal conductivity and heat transfer. Due to the involvement of the trunk in th is only the surface of the drive nacelles. This can occur according to the invention preferably without departing from the simple surface cooling as cool.

In the form of execution of the invention provides that the means for improving heat transfer is to increase the effective heat-release surface. In known from the prior art electric gondola drive as an effective heat-release surface is provided by only the outer wall of the drive gondolas in the field winding of the motor. Here is a straight lined heat transfer from the inner part to the outer wall. At the relevant invention measures this effective heat-release surface is significantly increased. The consequence is preferably better thermal characteristics gondola drive.

In another form of execution of the invention provides that the means for improving heat transfer is the temperature increase of the effective heat-release surface. Due to the temperature increase of the effective heat-release surface preferably increases the temperature difference relative to the ambient sea water and also when using the drive in tropical waters with tempera is particularly for cruise ships, which, for example, cross the Red sea.

To improve thermal conductivity, in particular to improve the conductivity of the field winding of the motor, provided that applies a material with higher heat conductivity than steel. To do this, especially preferred is a material of good heat conducting base alloy non-ferrous metal. In particular, copper containing alloys non-ferrous metals have higher thermal conductivity than steel. When using special copper bronzes resulting in another significant advantage that there is no fouling of the surface by marine organisms. So you can refuse the use of underwater protective coating on the surface of the nacelle and transition gondola-barrel. This rejection of painting leads to nantyffyllon increase the surface temperature of the heat-release surface, so as underwater protective paints are lower in more than one decimal degree of conductivity than metals. They operate in this way as an insulating layer and reduce the heat. Through the use of special copper bronze, it is recommended the so-called bronze for such materials are the best teploprovodnymi compared with steel, but is also achieved significantly higher temperature heat transfer.

In an electric gondola drive, in addition, provided that the drive gondola in part, pointing the barrel has a wall thickness that is reduced compared to the wall thickness, available in made debouncedelay part. Thus preferably a particularly good heat transfer from the not cooled directly by sea water part of the surface of the gondolas in the trunk. Wall thickness in part of the drive gondola pointing in the trunk, can be reduced to the extent that it allows the technique of casting. So in this area seems to be much higher surface temperature than in the rest of the middle area of the engine nacelle, which must be performed debouncedelay and therefore has a relatively large wall thickness in the middle.

Further provides that the drive gondola on the side pointing in the trunk, has an increased surface such as the surface, enlarged edges, embossed moulding or honeycombed sheet. Due to this preferably is achieved that the heat-release surface is greatly increased so that in this area may be povyshennaya thus over a large surface of the barrel into the sea water.

In the form of execution of the invention provides that the components of the increased surface contain the heat-conducting device (thermal channels), which are connected with the inner space of the motor. Thus may increase the temperature increased surface and thereby further increase the heat to circulate inside the barrel the air. There is no departure from the relevant invention the principle of the simple cooling.

Additionally go alternative the barrel may include a lower portion that at least partially made with double walls, with the inner space part of the double wall contains a heat transfer medium, as air or water. In the trunk are, if necessary, also the device for pumping mine air, such as fans, which are used to maintain a stable circulation. So given the gondola in the barrel heat may well be directed to the barrel wall and along it and surrender to the sea water through it.

The above devices are preferably only in the lower part of the trunk, which is always washed by sea water. The transition barrel-vessel is € location devices to improve heat transfer in the lower part of the trunk is achieved reliable heat sink. If the gondola drive, which is also located on a short trunk, which passes below the waterline to the vessel, appropriate devices are, of course, around the trunk. Because the location of the transition barrel-vessel on the waterline in principle are not provided for the location of the heat-release components in the mine are discussed only these two alternatives.

Additionally or alternatively provided that the drive gondola has devices that contain the coolant (heat pipes), due to this heat can be dissipated preferably directly so that we obtain a particularly good acting, economical and easy solution. In the development of this principle further provides that the motor contains the public on both sides of the hollow shaft, which is arranged to flow through a sea of water and, if necessary, conical. Thus the cooling of the electric motor is also from the inside.

In another form of execution provided that a motor shaft is convective cooling circuit, which transports heat from the middle of the motor to the cold ends. Thus preferably also the surface is provided, that the end windings of the motor contain convective working thermal channels to the cold outer ends to the side stabilizers or inside the lower part of the trunk. The end windings are not in direct contact with the outer wall of the drive gondolas, however, due to the current in them currents produce a significant amount of heat, in some cases, so additional cooling required windshields parts of the winding, it can be especially easy with the above-described thermal channels. It is particularly advantageous to use a surface cold outer ends, the side stabilizers or lower part of the trunk.

For the direct assignment of the allocated nose parts of the winding heat they preferably also supplied thermal bridges to the outer wall of the drive nacelles. For smaller drives even heat channels and other components of the cooling can fall away. Then a sufficient cooling of the outer wall gondola drive.

These heat bridges are preferably made of thermally conductive plastic filled with especially good heat-conductive material. As plastic is suitable, for example, epoxy solbit more than the dimensions of the end parts of the winding, and is to be performed, for example, in the form of heat rings, which are preferably the joints between the individual segments of the end parts of the winding. Thus the form of the heat bridges with a particularly large amount of heat from the end parts of the winding to the outer wall of the drive gondola.

Further provides that the drive nacelle and/or the lower part of the trunk contain to improve cooling increases the surface elements, such as external ribs or external relief molding. Due to this also achieves improved heat from the engine into the sea water, and especially preferably these external ribs or external relief moulding can assume also guides the flow of functions that support the action of the stabilizers.

On the transition from trunk to drive the gondola is provided, if necessary, streamlined water against contamination floating material conically made cooling channels, thus this area is especially good cooling. The cooling channels may result in thermal channels, which are derived from the inner space privatelist engine-shaft is made of at least partially double-walled, moreover, the space between the two walls is arranged to flow through him coolant, in particular water. In such spaces with double walls through one side of the heat input is obtained circulation so that those areas with double walls can be used as areas of good heat dissipation. In addition, they have the advantage that they can enhance, for example, the lower part of the trunk or what they can contribute to education especially debouncedelay form. Here can be achieved thus Raman effect.

The heat-conducting device is made as an electric motor does not require maintenance. Because they work without circulation pumps, it is possible without any problems. They can therefore be executed in a node that binds the gondola motor drive one block, which does not require technical operation, maintenance or even repair. As the heat-conducting and heat-release devices are in the lower part of the trunk, they do not interfere with the removal of the lower part of the trunk, which is made by the divers, if the gondola drive is replaced for repair when remaining in the water swam get significantly better service and costs.

The invention is explained in more detail with the help of images, which show preferred examples of implementation of which as well as from the dependent claims and the description can be understood further details of the invention.

Thus, in particular, show: Fig. 1 - gondola drive in accordance with the prior art (publication AES 97).

Fig. 2 - cooled according to the invention gondola drive in the schematic diagram in the section.

Fig.3 - the location of the cooling surfaces according to Fig. 2 in a schematic diagram.

Fig. 4 - streamlined water cooling channels on the transition drive gondola-trunk.

Fig.5 - the location of the inner double wall in the lower part of the trunk.

Fig.6 is a more detailed cross-section through the side of the drive gondolas with thermal bridges in the area of the end parts of the winding.

In Fig.1, which shows the prior art from which the invention proceeds, the number 1 denotes an electric drive motor 1. Position 2 indicates driven by an electric drive motor 1 prop. 3 indicates an external wall of the gondola, the contour of which is stored in part, pointing in the direction of the barrel. 4 denotes a cutter barrel runs through down cable strand 6 to econamine electric motor 1. In the trunk there is a staircase 7, with which the inspector gets easy access to the lower part of the trunk. As the gondola wire is made does not require maintenance and is not available, the inspector should only control flange connections 4 and 5. Because they are designed for long life, with newer forms of execution, that is also in the form of execution according to the invention, there is no bottom part of the stairs 7. The lower part of the trunk thus is free for built-in equipment; also for built-in equipment, which makes it impossible to access the outer wall of the electric motor.

In the upper part of the trunk is placed not represented in more detail assistive devices such as bilge pumps, compressed air sealing at the transition from the barrel to the vessel, etc.

Fig. 2 shows a schematic representation of the drive gondolas with an electric motor 10 which is connected via the not presents thermal channels with one or multiple cooling elements 11 in the lower part of the trunk, in particular, on the walls of the lower part of the trunk. For further cooling is shown gondola actuator includes a hollow shaft through which water flows. Channel techie channels is preferably exactly the same as channel flow, without built-in equipment.

In Fig.3 also schematically shown located at the bottom of the barrel cooling elements 13 and 14. As shown schematically in Fig. 2 the form of the cooling element, there can be used all known from the technique of cooling the cooling element. The location of the cooling elements is arbitrary, possible are also additional cooling elements in the free space of the hollow shaft. The fact that you do not want the electric motor 10 was available.

In Fig.4 shows the coolant pipe 15 on the transition of the barrel 16 to the gondola drive 17. They are also lengthwise, as shown in Fig.2 the hollow shaft. Also the outside of the pipes of the cooling means 15 can be through thermal channels in connection with the inner space of the drive motor. The coolant pipe 15 can, however, serve also for a particularly intensive cooling is addressed to them a part of the external wall of the gondola.

Fig. 5 shows the form of the double wall of the lower part of the barrel with the outer wall 18 and is inserted an inner wall 19, and the intermediate protrans spaleny for the flow of water. The cross-section of flow of the coolant in the case of the use of water is preferably round, if applied thermal channels for air, preferably provided by the slots for the influx.

In Fig.6, which shows a more detailed cross-section through the end of the drive housing gondola, position 21 denotes a thermal bridge to the end parts of the winding 22 of the stator windings 24. The stator winding 24 are in the middle in the case of the gondola 23, which is preferably made of the same material as the screw 29, that is made of special bronze for propellers. Between the rotor 25 and stator 24 is an air gap 30. The rotor 25 is located on the inner pipe 26, which is in turn mounted on the shaft 27. The fastening is carried out through the clutch 31. On the side of the barrel housing gondola 23 has a cooling chamber 28, which may serve as output for thermal channels in the trunk. Then here you can refuse to increase the surface due to the ribs or similar clutch, shaft supports, etc. are not relevant to the invention and therefore not illustrated.

In the sleeve is a hollow space 33, which, if necessary, is connected to the burden the middle part of the gondola drive. Thus, it is possible with thermal point of view good use cold ends gondola drive.

Corresponding to the invention the cooling element according to the invention allow many combinations. Separate events are selected depending on the region of the vessel and the size of the engine. Common to them is the rejection of the long paths of the coolant and from the units for pumping the coolant. Thus, a significant improvement was also compared to that shown in U.S. patent 5403216 and 2714866 technology.

Claims

1. Electric gondola drive to the ship, which contains videostacey made debouncetime, adapted to drive a gondola motor, and the drive nacelle is installed on the bottom of the vessel through the hollow shaft, while secreted by the motor heat is largely through the surface of the drive gondolas, and to a lesser extent through the surface portion of the barrel adjacent to the driving gondola, flowing water, characterized in that the motor (10) contains the end windings (22) with heat bridges (21) to the water cooling channels (15).

2. Electric gondola drive under item 1, characterized in that the means for improving thermal conductivity is the use of a material with thermal conductivity higher than that of steel.

3. Electric gondola drive under item 2, characterized in that at least the material of the drive gondola (17, 23) consists of a base alloy non-ferrous metal.

4. Electric gondola drive under item 2 or 3, characterized in that the material is bronze alloy, in particular, cu Al 10 Ni.

5. Electric gondola drive in one of the preceding paragraphs, characterized in that a heat bridges (21) made of thermally conductive plastic.

6. Electric gondola drive under item 5, wherein thermally conductive plastic to improve thermal conductivity contains fillers.

7. Electric gondola drive in one of the preceding paragraphs, characterized in that the outer region of the engine and/or the transition region engine-shaft is made at least partially with double walls, the space between the two walls is arranged to flow through him coolant, in particular water.

 

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