Water lubrication tilting pad static-pressure bearing structure cooled through water returning grooves

Abstract

The invention discloses a water lubrication tilting pad static-pressure bearing structure cooled through water returning grooves. The water lubrication tilting pad static-pressure bearing structure comprises a bearing bush base, static-pressure tilting pads, a hollow pin, a rotating shaft, an end cover and the like. Two low-pressure annular water grooves and one high-pressure annular water groove are formed in the outer cylindrical face of the bearing bush base. Each static-pressure tilting pad is formed by stacking outer stainless steel pad bodies and inner porous ceramic static-pressure pad bodies. The water returning grooves are formed between every two adjacent static-pressure tilting pads, and each water returning groove is communicated with the two low-pressure annular water grooves through circular holes. According to the water lubrication tilting pad static-pressure bearing structure, on one hand, static-pressure water cavity structures made of porous ceramic materials are adopted in the tilting pads, and the pads can flexibly swing around the fulcrums of the pads to reduce the intersection rigidity of a static-pressure bearing; on the other hand, a high-pressure and low-pressure combined water supplying mode is adopted, high-pressure supplied water is communicated with the static-pressure water cavities in the tilting pads through the high-pressure annular water grooves to improve the carrying capacity of the bearing, and low-pressure supplied water is communicated with the water returning grooves through the two low-pressure annular water grooves to reduce the temperature rising of the water bearing on a high-speed condition.

Description

technical field [0001] The invention belongs to the technical field of lubrication and bearings, and relates to a water-lubricated tilting pad hydrostatic bearing structure cooled by a return water tank. Background technique [0002] Water-lubricated bearings have remarkable features such as high efficiency and energy saving, environmental protection, and good viscosity-temperature characteristics, and are used in ships, water turbines, water pumps, hydraulic components and other products. In recent years, with the development of high-speed, high-precision, and high-rigidity industrial rotating machinery, high-speed water bearings have become one of the research hotspots in the academic circles. For example, Swiss FISCHER and American IBAG have successfully developed hydrostatic bearings. It is also used in machine tool spindles, squeeze film dampers and other products. However, due to the existence of cross stiffness, hydrostatic bearings are prone to oil film oscillations...

AI Technical Summary

Problems solved by technology

However, due to the existence of cross stiffness, hydrostatic bearings are prone to oil film oscillations under high-speed conditions, resulting in instability, and there is a technical bottleneck of severe heat generation in hydrostatic bearings under high-speed conditions, which limits the development of hydrostatic bearings. Promotion and application in high-speed and high-precision rotating machinery

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