Bush-tilting dynamic pressure bearing

Abstract

The invention relates to the technical field of sliding bearings, in particular to a bush-tilting dynamic pressure bearing implementing pressure fluid inner feedback supporting on a bush back. The bush-tilting dynamic pressure bearing specifically comprises a bearing outer ring, a bush and a mounting assembly; and an oil gathering tank is arranged on the sliding face of the bush, gathers a pressure lubrication fluid on the sliding face and feeds back and guides the pressure lubrication fluid into an oil cavity formed in the back face of the bush through an oil hole to form supporting force forthe bush. A deformation structure is arranged in the middle of the bush to divide the bush into two blocks, and the mounting assembly applies radial elastic compressing force to the bush. When the bearing works, under the effect of the supporting force of the oil cavity in the back face of the bush, the corresponding block of the bush overcomes the radial elastic compressing force and spindle load force to be upwarped with the deformation structure as a supporting point to achieve bearing bush tilting, and a convergent gap is formed to enable the bearing to achieve the good lubrication bearing effect; the back face of the bush and the inner surface of the bearing outer ring achieve full-contact supporting, and thus supporting stability is facilitated; and the working flow of the bearing can be additionally increased through the generated inner feedback lubrication flow, and thus cooling of the bearing is greatly facilitated.

Description

technical field [0001] The invention relates to the technical field of fluid-lubricated dynamic pressure sliding bearings, in particular to a tilting pad dynamic pressure bearing with pressure fluid internal feedback support for the pad back. Background technique [0002] Tilting pad bearings are generally composed of 3 to 6 arc-shaped pads that can tilt freely on the fulcrum, so they are also called live fulcrum multi-wafer support bearings, also called swinging tilting pad bearings. Different loads and bearing temperatures make adaptive swings, forming multiple oil films around the journal, and the pressure of each oil film is concentrated toward the center, with the advantages of large bearing capacity, good vibration resistance, low power consumption, and high rotation accuracy. The manufacturing process is relatively simple. , the lubrication system is simple, the use and maintenance cost is low, and the application range in the industrial field is larger than that of t...

AI Technical Summary

Problems solved by technology

In addition to the above-mentioned methods of fulcrum, steel spherical fixed fulcrum tilting pad bearings are also commonly used, that is, a spherical protrusion is set on the back of the pad as a fulcrum. This kind of bearing has certain limitations in suppressing oil film oscillation performance, and the spherical fixed fulcrum For point contact, the fulcrum may wear and fail after long-term operation, shortening the service life of the bearing

[0004] To sum up, because the pads of the existing tilting pad dynamic pressure bearings realize spatial swing, the supporting area between the pads and the outer ring of the bearing support bearing is small and there is a gap, so vibrations are easily generated during work, and the load is unstable , transportation and installation are also inconvenient

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