초록 ▼

An air foil bearing assembly is provided. The air foil bearing assembly includes a bearing housing that has a hollow into which a rotary shaft is fitted and a slot of which both ends are open toward front and rear sides formed on an inner circumference surface of the hollow. A bump foil is provided

An air foil bearing assembly is provided. The air foil bearing assembly includes a bearing housing that has a hollow into which a rotary shaft is fitted and a slot of which both ends are open toward front and rear sides formed on an inner circumference surface of the hollow. A bump foil is provided to have a combining portion inserted to the slot and disposed in the inner circumference surface of the hollow. A top foil having a combining portion is inserted to the slot and is disposed in an inner side of the bump foil. A stopper is disposed on one of the combining portions of the bump foil or the top foil to prevent the combining portion of the bump foil or the top foil from being displaced from the slot toward the front and rear sides.

대표청구항 ▼

1. An air foil bearing assembly, comprising: a bearing housing that includes a hollow into which a rotary shaft is fitted and a slot which is open toward front and rear sides of the bearing housing and which is formed on an inner circumference surface of the hollow;a bump foil that includes a first

1. An air foil bearing assembly, comprising: a bearing housing that includes a hollow into which a rotary shaft is fitted and a slot which is open toward front and rear sides of the bearing housing and which is formed on an inner circumference surface of the hollow;a bump foil that includes a first combining portion inserted into the slot and is disposed in the inner circumference surface of the hollow;a top foil that includes a second combining portion inserted into the slot and is disposed in an inner side of the bump foil; anda stopper disposed on the first combining portion to prevent the first combining portion from being displaced from the slot,wherein the stopper includes an engagement key formed at front and rear ends of the first combining portion, and supporting front and rear surfaces of the bearing housing. 2. The air foil bearing assembly of claim 1, wherein the engagement key surrounds front and rear ends of the second combing portion. 3. An air foil bearing assembly, comprising: a bearing housing that includes a hollow into which a rotary shaft is fitted and a slot formed on an inner circumference surface of the hollow, wherein the slot has a front open end that is open toward a front side of the bearing housing and a rear open end that is open toward a rear side of the bearing housing;a bump foil that includes a first combining portion inserted into the slot and is disposed in the inner circumference surface of the hollow;a top foil that includes a second combining portion inserted into the slot and is disposed in an inner side of the bump foil; andan engagement key that extends from front and rear ends of the first combining portion, is bent to surround front and rear ends of the second combining portion, wherein the engagement key is configured to be elastically deformed in a width direction of the slot. 4. The air foil bearing assembly of claim 3, wherein the engagement key of the rear side is fitted into the front open end of the slot, compressed and deformed, and is restored by being withdrawn from the rear open end of the slot and supports the rear side of the bearing housing. 5. The air foil bearing assembly of claim 4, wherein the engagement key of the rear side surrounds the rear end of the second combining portion, and is slidably combined to the slot, compressed and deformed. 6. The air foil bearing assembly of claim 4, wherein the engagement key of the front side supports the front side of the bearing housing when the engagement key of the rear side is displaced from the rear open end of the slot and is restored. 7. The air foil bearing assembly of claim 3, wherein a notch groove that corresponds to the engagement key is formed at the front and rear ends of the second combining portion. 8. The air foil bearing assembly of claim 3, wherein a recess that accommodates the engagement key is formed at front and rear surfaces of the bearing housing. 9. The air foil bearing assembly of claim 8, wherein at the recess, the front and rear open ends of the slot and a supporting surface that supports the engagement key are formed. 10. The air foil bearing assembly of claim 3, wherein the engagement key includes: an engagement end that supports the front and rear sides of the bearing housing; anda bending portion that extends from the front and rear ends of the first combining portion and is bent such that a width between the engagement end and the first combining portion is greater than a width of the slot. 11. The air foil bearing assembly of claim 10, wherein the bending portion includes a plane surface connected with the engagement end. 12. The air foil bearing assembly of claim 10, wherein the bending portion includes a multi-stage step surface connected with the engagement end. 13. The air foil bearing assembly of claim 3, wherein the engagement key of the rear side includes: an engagement end that supports the rear side of the bearing housing; anda rear bending portion that extends at the rear end of the first combining portion and is bent such that a width between the engagement end and the first combining portion is greater than a width of the slot. 14. The air foil bearing assembly of claim 13, wherein the engagement key of the front side includes a front bending portion that extends from the front end of the first combining portion and is bent at about a right angle. 15. The air foil bearing assembly of claim 14, wherein the front bending portion is welded to the front end of the first combining portion. 16. An air foil bearing assembly, comprising: a bearing housing that includes a hollow into which a rotary shaft is fitted and a slot formed on an inner circumference surface of the hollow, wherein the slot has a front open end that is open toward a front side of the bearing housing and a rear open end that is open toward a rear side of the bearing housing;a bump foil that includes a first combining portion inserted into the slot and is disposed in the inner circumference surface of the hollow;a top foil that includes a second combining portion inserted into the slot and is disposed in an inner side of the bump foil;a first engagement key that extends from a front end of the first combining portion, is bent to surround a front end of the second combining portion; anda second engagement key that extends from a rear end of the first combining portion, is bent to surround a rear end of the second combining portion,wherein the first engagement key and the second engagement key are configured to be elastically deformed in a width direction of the slot. 17. The air foil bearing assembly of claim 16, wherein the second engagement key includes: a rear engagement end that supports the rear side of the bearing housing; anda rear bending portion that extends from the rear end of the first combining portion and is bent such that a width between the rear engagement end and the first combining portion is greater than a width of the slot. 18. The air foil bearing assembly of claim 16, wherein the first engagement key includes a front bending portion that extends from the front end of the first combining portion and is bent at about a right angle. 19. The air foil bearing assembly of claim 18, wherein the front bending portion is welded to the front end of the first combining portion.