JP6498283B2 - Gondola propulsion device with traction propeller - Google Patents

Description

  The present invention relates to a gondola propulsion device for a water facility comprising a casing and at least one traction propeller. The present invention further relates to a water facility provided with such a gondola propulsion device.

  Such a gondola propulsion device (also referred to as a pod propulsion device) can be used in principle for any water facility, and functions as a propulsion device as well as an “active rudder”. The gondola propulsion device can be driven mechanically, for example by a diesel engine or by an electric motor, and is coupled to the water facility via a rotatable shaft. As with any propulsion device, efficiency issues are important with a gondola propulsion device. This is because, in particular for large vessels, a relatively slight increase in efficiency has already been observed in a very significant fuel savings and corresponding cost savings. Of particular importance to the present invention is the recovery of rotational energy from the propeller jet.

  In order to recover rotational energy from the propeller jet, there are various means such as a grim vane wheel, a hub cap propeller, and a fin.

  The Grim vane wheel is located behind the propeller (as viewed in the driving direction) and converts rotational energy into additional propulsion. The propeller jet range of the Grim vane wheel consists of a turbine part, and the outer area of the propeller jet consists of a propeller part for propulsion generation, or the grim vane wheel has both parts. Because the propeller portion protrudes from the propeller jet, the grim vane wheel has a diameter up to about 20% larger than the propeller diameter. In normal operation, the Grim vane wheel rotates at 30% to 40% of the propeller speed and can save up to 10% of fuel.

  However, in practice, it has been found that the Grim vane wheel is very prone to failure. Furthermore, the space for larger grim vane wheels is usually no longer present when trying to design the propeller as large as possible to achieve optimum efficiency.

  In the case of the hub cap propeller known from EP 0 758 606, the hub cap for closing the hub hole provided in the free end of the propeller hub resists the vortex generated by the propeller. It is formed to act.

  It is also known to attach fins to the casing of the pod propulsion device that convert some of the rotational energy induced by the flow into forward propulsion. However, if the ship has a drastically changing operational profile, the inflow to the fins will not be optimal and will in turn cause additional resistance.

  An object of the present invention is to provide a gondola propulsion device for a water facility that is improved compared to a known configuration.

  This problem is solved by the fact that the gondola propulsion device has a guide vane wheel in the gondola propulsion device of the type mentioned at the beginning. This can improve flow characteristics or better utilize the flow.

  The above problem is further solved by a water facility provided with the above-described gondola propulsion device.

  Another configuration of the present invention according to claim 1 or claim 12 is described in claims 2 to 11 and claim 13.

  In the single propeller configuration of the pod propulsion device, the side opposite the propeller usually has or consists of a cap that is flanged. This cap has, for example, the function of guiding the flow, the function of sealing the casing and / or the function of enabling maintenance entry upon docking. Since the flow and rotation of at least one traction propeller is guided around the entire casing, the configuration of the gondola propulsion device at the rear end (as viewed in the driving direction) of this casing is a guide vane wheel as a rotation recovery device. Is assumed. When arranged in this way, the propeller shaft and the guide vane wheel shaft are advantageously separated from each other, thereby reducing the complexity of the bearing. In this case, there are no problematic high relative speeds of shaft-in-shaft bearings (such as those originally used in grim vane wheels).

  That is, in one configuration of the gondola propulsion device, at least one guide vane wheel is disposed on a guide vane wheel shaft supported by at least one bearing on the opposite side of the casing from the at least one traction propeller. . In this way, the guide vane wheel can be easily pulled away from the towing propeller.

  In another configuration of the gondola propulsion device, at least one guide vane wheel is supported on the side of the casing where the traction propeller is located. For this reason, for example, the guide vane wheel can be supported by a rigid shaft. The rigid shaft is in particular a kind of hollow cylinder, into which the shaft of the traction propeller extends.

  In yet another configuration of the gondola propulsion device, at least one guide vane wheel is supported on the casing. The support location may be the beginning, middle or end of the casing. The bearing is for example incorporated in the casing and / or attached to the casing.

  In yet another configuration, the diameter of the at least one traction propeller and the diameter of the at least one guide vane wheel are at least substantially equal. In the case of a grim vane wheel mounted on the propeller shaft immediately behind the propeller, the guide vane wheel diameter is, for example, about 20% larger than the diameter of the propeller located in the front, which makes the propeller of the guide vane wheel The part will protrude from the vortex flow. However, it is not always possible to use a guide vane wheel larger than the propeller. This is because the overall efficiency depends on the propeller diameter, and the highest possible overall efficiency is desirable. Therefore, the largest possible propeller should be selected. The diameter of the guide vane wheel can be adapted to the propeller jet. If the guide vane wheel is arranged on the opposite side of the traction propeller, for example with respect to the casing, the propeller jet will be based on the large distance and the stenosis of the jet at the position where the guide vane wheel is arranged, especially from the traction propeller Will also have a small diameter. In other words, a guide vane wheel having a similar diameter corresponding to the traction propeller can be used. Similar diameters or “substantially” equal diameters may mean diameters with a magnitude difference of up to ± 10%. That is, in one configuration, the guide vane wheel is up to 10% larger in diameter than the traction propeller.

  In one configuration of the gondola propulsion device, the guide vane wheel has a larger diameter than the traction propeller. This is possible, for example, if the draft to be reached allows and / or if the distance between the hull and the guide vane wheel is still large enough.

  In one configuration of the gondola propulsion device, the at least one guide vane wheel has a diameter that is larger than the casing of the gondola propulsion device and in particular smaller than the traction propeller. Thereby, rotation can be utilized sufficiently satisfactorily.

  In another embodiment, the casing has at least two parts, one of these parts having at least one bearing for the guide vane wheel shaft. If one or more parts of the pod casing, which do not have bearings for the guide vane wheel shaft, are sealed separately (eg by a flange-fastened lid), the guide vane wheel part (“guide The vane wheel adapter ") does not require a significant sealing member. This is because the guide vane wheel part is isolated from the remaining pods, both spatially and in terms of sealing.

  In yet another embodiment, at least one bearing is water lubricated. In particular, if the guide vane wheel part is isolated from the rest of the pods, a (sea) water-lubricated bearing can be used for the guide vane wheel shaft. As a result, the bearing can be easily lubricated. In this case, the seawater is for example purified or filtered before lubrication.

  In yet another embodiment, the casing is configured such that the flow generated by the at least one traction propeller is directed toward the guide vane wheel shaft and / or the guide vane wheel. Since there are usually only two sets of bearings (thrust bearings and radial bearings) other than the guide vane wheel shaft at the rear end (as seen in the driving direction), especially the contour of the rear “hood” A design designed for optimized flow guidance can be formed without problems, and this design also ensures inflow in the area of the propeller hub of the guide vane wheel.

  In yet another embodiment, at least one flow guide is arranged in the casing, through which the flow generated by the at least one traction propeller is directed in the direction of the guide vane wheel axis. With such a flow guide, it is possible to minimize the action of the shaft of the pod drive device, in particular on the inflow into the guide vane wheel. The flow guides guide the flow along the casing surface to a particularly effective zone of the guide vane wheel turbine stage, thus preventing or at least reducing uneven loading of the vanes of the guide vane wheel. it can.

  For example, a surface facility such as a passenger ship or container ship, frigate ship or destroyer may have a gondola propulsion device or a plurality of gondola propulsion devices with at least one guide vane wheel. In other words, when the water facility has, for example, a plurality of gondola propulsion devices, at least one gondola propulsion device may have at least one guide vane wheel. Various configurations of gondola propulsion devices have been described above. When there are a plurality of gondola propulsion devices for a water facility, one propulsion device, in particular one gondola propulsion device, may have a traction propeller and / or a propulsion propeller with no corresponding arrangement of guide vane wheels.

  Hereinafter, the present invention will be described in more detail based on the illustrated embodiments.

1 is a diagram showing a first embodiment of a gondola propulsion device according to the present invention. It is a figure which shows 2nd Embodiment of the gondola propulsion apparatus by this invention. It is a figure which shows the flow guide body based on another embodiment of the gondola propulsion apparatus by this invention.

  A gondola propulsion device 1 according to the present invention shown in FIG. 1 includes a casing 2, a traction propeller 3, and a guide vane wheel 4 attached to a guide vane wheel shaft 5. Are supported by two bearings 6, 7 provided in a predetermined portion 8. An electric machine 12 for driving the traction propeller 3 is accommodated in another part 9 of the casing 2, and the shaft of the traction propeller 3 is supported by another bearing provided in the parts 9 and 10. . A broken line between the traction propeller 3 and the guide vane wheel 4 represents a jet stenosis of the propeller jet. Based on this jet stenosis, a guide vane wheel 4 having the same diameter as the traction propeller 3 can be used. . If the part 9 is sealed separately to the guide vane wheel part 8, the guide vane wheel adapter 8 does not require a large sealing member. This is because the guide vane wheel adapter 8 is isolated from the remaining pods in terms of space and sealing. That is, in this case, it is advantageous to use (sea) water-lubricated bearings 6 and 7.

  In another embodiment of the gondola propulsion device 1 according to the invention shown in FIG. 2, the design of the rear hood 8 (as viewed in the driving direction) is designed to achieve an optimized flow guide. Since only the two sets of bearings 6 and 7 (thrust bearings and radial bearings) need to be accommodated in this module 8 in addition to the shaft 5, the hood 8 is ensured so that inflow is ensured even in the area of the propeller hub. It is possible to form the contour of the film in accordance with the flow without any problem. For the explanation of the other symbols, refer to the explanation relating to FIG.

  The perspective view of the module 9 incorporating the electric machine 12 shown in FIG. 3 relates to another embodiment of the gondola propulsion device 1. In order to minimize the effect of the shaft on the flow into the guide vane wheel and / or to direct the flow generated by the traction propeller further towards the guide vane wheel shaft, the flow is directed along the casing surface to the guide vane wheel turbine stage. A plurality of flow guide bodies 11 for guiding are attached to the casing 2.

  In summary, the present invention also relates to a gondola propulsion device for a water facility comprising a casing and at least one traction propeller, and a water facility comprising such a gondola propulsion device. In order to provide an improved gondola propulsion device compared to known arrangements, for example, at least one guide vane wheel is supported by at least one bearing on the side of the casing opposite the at least one traction propeller. It is proposed to arrange on the guide vane wheel shaft.

Claims (15)

A gondola propulsion device (1) for a water facility comprising a casing (2) and at least one traction propeller (3),
The gondola propulsion device (1) has at least one guide vane wheel (4) ;
The at least one guide vane wheel (4) is supported by at least one bearing (6, 7) on the opposite side of the casing (2) from the at least one traction propeller (3). Located on the wheel axle (5)
The at least one traction propeller (3) and the guide vane wheel shaft (5) are separated from each other;
A gondola propulsion device. Wherein the at least one guide vane wheel (4), the are supported by the casing (2), according to claim 1 Symbol mounting gondolas propulsion device. The gondola propulsion device according to claim 1 or 2 , wherein a diameter of the at least one traction propeller (3) and a diameter of the at least one guide vane wheel (4) are at least substantially equal. The gondola propulsion device according to claim 1 or 2 , wherein the at least one guide vane wheel (4) has a larger diameter than the traction propeller (3). Wherein the at least one guide vane wheel (4), said casing (2) has, gondola propulsion apparatus according to claim 1 or 2 wherein has a smaller diameter than and before Symbol traction propeller (3) greater than. The casing (2) has at least two parts (8-10), one of which (8) is the at least one bearing for the guide vane wheel shaft (5). The gondola propulsion device according to any one of claims 1 to 5 , comprising (6, 7). An electric machine (12) for driving the traction propeller (3) is housed in a portion (9) different from the one portion of the casing (2),
Gondola propulsion device according to claim 6, wherein said another part (9) is separately sealed with respect to said one part (8) of said casing (2). The gondola propulsion device according to claim 7, wherein the at least one bearing (6, 7) for the guide vane wheel shaft (5) is a seawater lubricated bearing. Wherein at least one bearing (6, 7) are water lubricated, gondola propulsion device according to any one of claims 1 to 7.   The casing (2) is formed such that the flow generated by the at least one traction propeller (3) is directed in the direction of the guide vane wheel shaft (5) and / or the guide vane wheel (4). The gondola propulsion device according to any one of claims 1 to 9.   At least one flow guide body (11) is arranged in the casing (2), and the flow generated by the at least one traction propeller (3) through the flow guide body (11) is the guide. Gondola propulsion device according to any one of the preceding claims, oriented in the direction of the vane wheel shaft (5) and / or the guide vane wheel (4). The gondola propulsion device according to any one of claims 1 to 11, wherein the guide vane wheel shaft (5) has a thrust bearing and a radial bearing. 13. A gondola propulsion device according to any one of the preceding claims, wherein the guide vane wheel (4) is up to 10% larger in diameter than the traction propeller (3). A water facility provided with the gondola propulsion device (1) according to any one of claims 1 to 13 . The water facility according to claim 14, wherein the at least one propulsion device of the water facility comprises a plurality of gondola propulsion devices having only one traction propeller and / or propulsion propeller.

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