Oil supply method of liquid dynamic pressure thrust bearing

Abstract

The invention discloses an oil supply method of a liquid dynamic pressure thrust bearing. The oil supply method comprises the following steps: injecting cold oil in an oil tank, wherein the oil level height of the cold oil is less 200mm higher than the working face of a runner plate; setting an oil inlet pipe on an oil storage pool between any two adjacent bearing bushes, wherein the oil inlet pipe is communicated with an external cold oil pump; when the liquid dynamic pressure thrust bearing works, opening the cold oil pump to pump out the mixed oil in the oil tank and then injecting the cooled oil into the oil storage pool; and adsorbing the cold oil in the oil storage pool to the oil inlet ends of the bearing bushes by a runner plate, wherein the adsorbed cold oil enters between the bearing bushes and the runner plate to form lubrication oil films and the lubrication oil in the oil films flows into the oil tank to form a closed circulating oil way. According to the oil supply method provided by the invention, oil supply is carried out through the oil storage pool, and in coordination with the low oil level in the oil tank, the stirring loss of the thrust bearing can be effectively reduced, the oil temperature rise of the whole thrust bearing can be restrained, the bearing capacity of the thrust bearing can be improved, the damage to the bearing bushes due to oil lack can be prevented and the serious accident of the main engine and economic loss can be avoided.

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 ente...

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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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