Oil supply method for a hydrodynamic thrust bearing

Abstract

The invention discloses an oil supply method for a hydrodynamic pressure thrust bearing. Cool oil is injected into the oil tank, and the oil level of the cold oil is not higher than 200 mm of the working surface of the mirror plate; An oil inlet pipe is set on the oil storage tank, and the oil inlet pipe is connected with the external cold oil oil pump. When the hydrodynamic thrust bearing is working, the cold oil oil pump is turned on, and the mixed oil in the oil tank is pumped out first, and then injected into the oil storage tank after cooling. The cold oil in the oil storage tank is adsorbed to the oil inlet end of the bearing bush, and the adsorbed cold oil enters between the bearing bush and the mirror plate to form a lubricating oil film, and the lubricating oil in the oil film flows into the oil groove to form a closed circulating oil circuit. The oil supply method provided by the present invention supplies oil through the oil storage pool and cooperates with the low oil level in the oil tank, which can effectively reduce the stirring loss of the thrust bearing, suppress the rise of the working oil temperature of the entire thrust bearing, and improve the bearing capacity of the thrust bearing; Damage due to lack of oil, to avoid serious accidents and economic losses of the main engine.

Description

technical field [0001] The invention relates to the technical field of sliding bearings of mechanical products, in particular to an oil supply method for a hydrodynamic thrust bearing. Background technique [0002] The hydrodynamic thrust bearing is composed of several oil wedges, and its carrying capacity is the sum of the oil film pressure of each oil wedge. It is often used in water turbines and steam turbines. The hydrodynamic thrust bearing is mainly composed of a rotating shaft, a mirror plate, a bearing bush and a bearing seat. The rotating shaft and the mirror plate are fixedly connected to drive the mirror plate to rotate. Below the surface, the bearing bush and the bearing seat are connected by equivalent support, and the bearing seat is fixed in the oil groove; the bearing bush takes the equivalent support as the fulcrum and forms a wedge-shaped gap with the mirror plate in the direction of rotation. The side is the oil outlet. When in use, the cold oil enters f...

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Problems solved by technology

[0005] The bearing oil supply method disclosed in this patent document is not only quite complicated to operate, but also the lubricating oil in the oil tank is delivered to the sliding bearing by the oil supply pump, and the oil after lubricating the sliding bearing passes through the oil return port and is cooled by the cooler before returning to the bearing. The oil tank is recycled, and the cooled cold oil enters the sliding bearing and will be mixed with part of the hot oil to form a mixed oil, which makes the working oil temperature of the entire sliding bearing higher and cannot fundamentally cool the sliding bearing, resulting in a lower bearing capacity of the entire sliding bearing. In addition, once the oil supply pump fails, even a very brief oil supply interruption will cause bearing damage, serious accidents and economic losses of the main engine, so it is not suitable for use on thrust bearings of large rotating machinery

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