Axially adjustable thrust bearing for jet propulsion units

一种喷射推进、止推轴承的技术，应用在轴和轴承、用同步推进部件的传动装置、推进的动力传递等方向，能够解决效率降低、喷射推进单元故障严重等问题

Inactive Publication Date: 2004-01-14
ROLLS ROYCE AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The failure of the jet propulsion unit in the high winds in the mid-Atlantic could be serious
[0009] Therefore, in some specific cases it is necessary to accept a certain reduction in efficiency due to slightly increased clearance

Method used

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  • Axially adjustable thrust bearing for jet propulsion units
  • Axially adjustable thrust bearing for jet propulsion units
  • Axially adjustable thrust bearing for jet propulsion units

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Reference is made to Figure 1 which schematically shows a longitudinal section of a jet propulsion unit 1 for propelling a watercraft. As an integral part of the watercraft 2, the jet propulsion unit 1 comprises an impeller pump 3 with a pump housing 4, comprising a front and a rear portion, mounted within the stern portion 5 of the hull of the watercraft 2, and typically Located at the transom stern 6 of the hull 2 ​​or along the transom stern. Furthermore, the impeller pump 3 includes an impeller 7 which is rotatably journalled on the center of a hub shell 8 and which is fixedly mounted in an impeller chamber 9 in the impeller shell 4 .

[0031] The impeller shell 4 and its impeller chamber 9 form an expandable, conical and spherical pipe part 10, and communicate with the seawater flow pipe 11, and the flow pipe 11 extends obliquely upward from the water inlet (not shown in the figure) , the water inlet is arranged below the load line of the ship, and preferably at t...

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Abstract

The present invention relates to a jet propulsion unit (1) for propulsion of a waterborne craft comprising at least one impeller pump (3) with a pump housing (4) in which an impeller shaft (22) or ajournal (21) connected to said impeller shaft (22) is rotatably journalled in bearings, and an impeller (7) blades (24), the impetter (7) being fixed to said impeller shaft (22) or journal (21) so as to follow the rotation of the impeller shaft (22), the impeller blades (24) being arranged at the impeller () with a play of the blades (25) between each impeller blade (24) and the inside (15) of the pump housing (4). According to the invention the jet propulsion unit (1) also comprises an axially adjustable thrust bearing (27) arranged to cooperate with the impeller shaft (22) for adjusting said play (25).

Description

technical field [0001] The invention relates to a jet propulsion unit for propelling a ship, comprising at least one impeller pump with a pump housing, and an impeller with impeller blades. In the pump casing of the impeller pump, the impeller shaft or a journal connected to the impeller shaft can be rotatably journaled in a bearing; Rotating to rotate, the impeller blades are set on the impeller, and there is play between each impeller blade and the inner side of the pump casing. Background technique [0002] Jet propulsion units of the type described above, also known as water jet or impeller units, are known in many different designs and sizes, from as small as about 500 kW to as large as 30,000 kW or more. Compared with traditional thrusters, water jet units have a very different propulsion method. Unlike conventional propellers, as they are called, they have a water pump or impeller pump mounted on the hull of the boat. The impeller pump comprises an impeller mounted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H11/08B63H23/32F16C17/04F16C23/02
CPCB63H11/08B63H23/321B63H2011/081F16C17/04F16C23/02F16C2326/30
Inventor 詹斯·托恩布拉德克里斯特·黑格冈纳·斯蒂鲁德
Owner ROLLS ROYCE AB
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