Dynamic and static pressure dual-function bearing device for stern bearing and adjusting method

Abstract

The invention relates to the technical field of ship stern shafts, in particular to a dynamic and static pressure dual-function bearing device for a stern bearing and an adjusting method. The dynamic and static pressure dual-function bearing device comprises a mounting base, the stern bearing arranged on the mounting base, sealing devices arranged on the two end sides of the stern bearing correspondingly, and a high-pressure oil supply system matched with the stern bearing; and the stern bearing comprises an upper bearing bush and a lower bearing bush which are matched with each other, an oil groove is formed in the inner surface of the lower bearing bush, an oil hole communicating to the outside of the lower bearing bush is formed in the oil groove, the high-pressure oil supply system comprises a high-pressure oil tank, a high-pressure oil pump, an oil supply pipeline and an oil return pipeline, the inlet end of the high-pressure oil pump communicates with the high-pressure oil tank, the outlet end of the high-pressure oil pump communicates with one end of the oil supply pipeline, the other end of the oil supply pipeline communicates with the oil hole, one end of the oil return pipeline is arranged on the upper bearing bush and communicates with the interior of the upper bearing bush, and the other end of the oil return pipeline communicates with the high-pressure oil tank. According to the dynamic and static pressure dual-function bearing device for the stern bearing and the adjusting method, the service life of the shaft and the bearing is greatly prolonged, the stability of the stern shaft is better, and the stern shaft is not easy to damage.

Description

technical field [0001] The invention relates to the technical field of ship stern shafts, and specifically relates to a dynamic and static pressure dual-function bearing device and an adjustment method for a stern bearing. Background technique [0002] With the rapid development of economic globalization, international trade has become increasingly close. Sea freight is the most important mode of transportation in international trade, responsible for more than two-thirds of the total volume of international trade. Ships are the carriers of shipping, and their importance is self-evident. Shafting is an important part of the ship's propulsion system, and bearings are the core components of the shafting. The stern bearing has harsh working conditions and is easily damaged. It not only bears the uneven cantilever load when the propeller rotates in water, but also may generate additional vibration during the operation of the propeller shaft. The failure of the stern bearing wi...

AI Technical Summary

Problems solved by technology

Docking maintenance of the stern bearing not only affects the maintenance cycle, but also the maintenance cost is expensive, which affects the economic benefits of the ship

[0003] At present, medium and large ships mainly use hydrodynamic oil-lubricated alloy bearings, because this kind of bearing has the advantages of convenient installation, high rotation accuracy, and low manufacturing cost, but the disadvantages are also obvious, such as: (1) Start and stop on the stern shaft , the starting torque of the stern shaft is large, and the stern bearing is prone to heat. In addition, because the running speed of the stern shaft is too low, the pressure oil film cannot be formed quickly, so the direct contact between the stern shaft and the surface of the stern bearing is inevitable, causing wear

(2) When the ship enters and exits the dock, the running speed of the stern shaft is relatively low, and it is difficult to form a reliable oil film between the stern shaft and the stern bearing, and the dry friction between the stern shaft and the stern bearing is large, which easily causes the wear of the stern bearing; (3) During the operation of the shaft, the deviation of the shaft center will vary with the working conditions such as external load and speed, and the stability is easily affected by external factors.

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