Composite dynamic/static-pressure slide bearing

Abstract

The invention provides a composite dynamic/static-pressure slide bearing. The composite dynamic/static-pressure slide bearing comprises a bearing inner sleeve and a bearing outer sleeve, wherein the bearing inner sleeve is arranged in the bearing outer sleeve; an original gap is formed between the bearing inner sleeve and the bearing outer sleeve; the bearing outer sleeve is provided with a liquid supply port; the liquid supply port is communicated with the original gap; a thrust cavity is formed between the end surface of one end of the bearing outer sleeve and the bearing inner sleeve; and the liquid supply port is communicated with the thrust cavity through the original gap. The composite dynamic/static-pressure slide bearing further comprises a shunt cavity; the shunt cavity is formed in the inner wall surface of the bearing outer sleeve; and the liquid supply port is communicated with the thrust cavity through the shunt cavity. The composite dynamic/static-pressure slide bearing is provided with the thrust cavity, the original gap and the liquid supply port, so that the axial force is balanced, and a liquid film is formed between the bearing inner sleeve and the bearing outer sleeve to prevent direct contact friction between an inner ring and an outer ring. According to the composite dynamic/static-pressure slide bearing, a peripheral bearing and a radial bearing are integrated into one bearing, so that the function of the radial bearing is realized when the bearing balances the axial force of a spaceflight mechanical pump.

Description

Technical field [0001] The invention relates to a bearing, in particular to a composite hydrostatic and hydrostatic sliding bearing for aerospace machinery pumps. Background technique [0002] The bearings used in aerospace mechanical pumps are basically ceramic rolling bearings. Due to the pressure on the front and back of the blades of the mechanical pump, axial force will be generated on the bearing. Excessive axial force causes the displacement of the inner ring of the bearing relative to the outer ring. The direction force causes the rolling elements (ceramic balls) to climb, resulting in surface contact between the rolling elements and the inner ring channel and the outer ring channel. The action of the axial force causes the plastic deformation of the channel. When the axial force is greater, the contact surface also increases, and the plastic component of the deformation also increases, which eventually leads to the failure of the bearing. [0003] After searching the prio...

AI Technical Summary

Problems solved by technology

However, this invention cannot balance the axial force of the mechanical pump and is easily damaged

Images