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Gas hybrid bearing based on turbine engine

A gas mixing and bearing technology, which is applied in the direction of air cushion bearings, engine components, machines/engines, etc., can solve the problems that the turbine engine affects the working stability, and achieve the effect of avoiding friction loss

Pending Publication Date: 2022-03-22
山西特博优新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a gas mixing bearing based on a turbine engine, which solves the problem that the existing turbine engine is easy to affect the working stability due to internal bearing damage

Method used

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  • Gas hybrid bearing based on turbine engine
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Embodiment

[0028] A gas hybrid bearing based on a turbine engine, as shown in the figure, includes a main shaft 1 , an upper half 3 of an elliptical bearing bush and a lower half 4 of an elliptical bearing bush. Both ends of the main shaft 1 are respectively provided with a row of groove groups composed of a plurality of wedge-shaped grooves 10 , the two rows of groove groups are parallel to each other and the center line of each groove group is perpendicular to the axis of the main shaft 1 .

[0029] Specifically look at a single groove 10, such as figure 2 As mentioned above, multiple specifications including the same outline and different sizes are arranged on the outer surface of the main shaft 1 in order from small to large. The grooves 10 are distributed along the Y line, that is, the centerline of the groove group is mirror-symmetrical, and a single groove 10 is arranged obliquely compared to the centerline of the groove, and the transverse length of each groove 10 is less than f...

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Abstract

The invention discloses a gas hybrid bearing based on a turbine engine. The bearing comprises a main shaft and an elliptical bearing bush, wherein an elliptical cylindrical space is formed in the middle of the elliptical bearing bush. A plurality of combinations of slits and nozzles are arranged on the circumferential surface of the elliptical bearing bush, and the slits are communicated with an air pump through an air passage. A main shaft is coaxially arranged in the elliptic cylindrical space in the elliptic bearing bush, a plurality of grooves are formed in the circumferential face of the main shaft, and the positions of the grooves correspond to the positions of the nozzles. The space in the elliptical bearing bush and the cylindrical main shaft form a wedge-shaped space, and the wedge-shaped space is overlapped with a dynamic pressure air film generated by a groove of a wedge-shaped structure formed in the main shaft to form a double dynamic pressure air film effect, so that the rigidity of the dynamic pressure air film in the bearing is improved, the bearing has higher bearing capacity, and the air bearing can work at high and low speeds; and the curvature radius of the bearing bush is increased, so that the absolute eccentric distance of the journal in the bearing bush is increased, and the stability of the bearing is improved.

Description

technical field [0001] The invention belongs to the field of gas bearings, in particular to a gas mixing bearing based on a turbine engine. Background technique [0002] The three characteristics of high speed, precision, and low friction are the basis for gas bearings to stand in the world of bearings and continue to develop. However, the small load, low rigidity, and poor reliability affect its wide application, which is a fly in the ointment place. [0003] The self-excited whirl instability and low load capacity of existing aerodynamic bearings limit their practicality. The most common type of instability in dynamic pressure bearings is the so-called half-speed whirl, that is, the shaking frequency of the rotor center around the cylindrical orbit of the s-bearing geometric center is about half of the rotor speed, due to the gas film at about half the rotor speed The speed of the rotation speed rotates, so the bearing gap disappears, and the contact between the moving a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/06F04B49/00
CPCF16C32/0622F16C32/0625F04B49/00F16C2360/23
Inventor 殷玉枫韩原臻付良王嘉誉张锦
Owner 山西特博优新能源科技有限公司
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