Gas seal assembly

1. A gas seal assembly comprising:

an inner sleeve in which a rotation axle is inserted;

a rotational sealing sleeve inserted into the inner sleeve;

a sealing sleeve contacting the rotational sealing sleeve;

a forcing sleeve forcing the sealing sleeve toward the rotational sealing sleeve by contacting the sealing sleeve;

a seal housing separated by a predetermined distance from the forcing sleeve and the sealing sleeve and supporting the forcing sleeve, wherein the seal housing does not extend to a space formed by an inner circumferential surface of the forcing sleeve opposite to an outer circumferential surface of the rotation axle; and

an elastic part mounted between the seal housing and the forcing sleeve and providing a restoring force to the forcing sleeve,

wherein the seal housing protrudes in a center direction of the rotation axle and comprises a supporting protrusion for supporting one end of the forcing sleeve.

2. The gas seal assembly of claim 1 , wherein the inner sleeve comprises a seating groove into which the rotational sealing sleeve is inserted and seated.

3. The gas seal assembly of claim 1 , further comprising a first sealing part disposed at a portion where the inner sleeve and the rotational sealing sleeve contact each other and inserted into the inner sleeve.

4. The gas seal assembly of claim 3 , wherein the first sealing part blocks a gas flowing along a portion where the inner sleeve and the rotational sealing sleeve contact each other.

5. The gas seal assembly of claim 1 , wherein the rotational sealing sleeve and the sealing sleeve contact each other.

6. The gas seal assembly of claim 1 , further comprising a second sealing part disposed between the sealing sleeve and the forcing sleeve and contacting the sealing sleeve and the forcing sleeve.

7. The gas seal assembly of claim 6 , wherein the second sealing part is inserted into at least one of the sealing sleeve and the forcing sleeve.

8. The gas seal assembly of claim 1 , further comprising a third sealing part disposed between the forcing sleeve and the seal housing and contacting the forcing sleeve and the seal housing.

9. The gas seal assembly of claim 8 , wherein the forcing sleeve is configured to apply a force directly to the seal housing through the elastic part, and wherein no intermediate sleeve is disposed between the forcing sleeve and the seal housing.

10. The gas seal assembly of claim 8 , wherein the third sealing part is inserted into the forcing sleeve or the supporting protrusion.

11. The gas seal assembly of claim 8 , wherein the third sealing part is mounted between the supporting protrusion and one end of the forcing sleeve.

12. The gas seal assembly of claim 1 , further comprising a position-determining sleeve connected to the inner sleeve and contacting the rotational sealing sleeve.

13. The gas seal assembly of claim 1 , wherein at least one of the forcing sleeve and the seal housing comprises an insertion groove into which a portion of the elastic part is inserted.

14. The gas assembly of claim 1 , wherein the forcing sleeve is configured to apply a force directly to the seal housing without through any intermediate sleeve.

15. The gas seal assembly of claim 1 , wherein a surface of the sealing sleeve facing the forcing sleeve consists of a first surface and a second surface, and the first surface is in contact with a surface of the forcing sleeve facing the sealing sleeve and the second surface is not in contact with the surface of the forcing sleeve facing the sealing sleeve.

16. A gas seal assembly comprising:

a rotational sealing sleeve inserted into an inner sleeve;

a sealing sleeve contacting the rotational sealing sleeve;

a forcing sleeve contacting and forcing the sealing sleeve to maintain a contact with the rotational sealing sleeve;

a seal housing separated by a predetermined distance from the forcing sleeve and the sealing sleeve and supporting the forcing sleeve, wherein the seal housing does not extend to a space formed by an inner circumferential surface of the forcing sleeve opposite to an outer circumferential surface of the rotation axle; and

an elastic part mounted between the seal housing and the forcing sleeve and providing a restoring force to the forcing sleeve,

wherein the seal housing protrudes in a rotation axle direction and includes a supporting protrusion for supporting one end of the forcing sleeve.

17. The gas assembly of claim 16 , wherein the forcing sleeve is configured to apply a force directly to the seal housing without through any intermediate sleeve.

18. The gas assembly of claim 17 , wherein the forcing sleeve is configured to apply a force directly to the seal housing without through any intermediate sleeve.

19. A gas seal assembly comprising:

a rotational sealing sleeve inserted into an inner sleeve;

a sealing sleeve contacting the rotational sealing sleeve;

a forcing sleeve contacting and forcing the sealing sleeve to maintain a contact with the rotational sealing sleeve;

a seal housing separated by a predetermined distance from the forcing sleeve and the sealing sleeve, protruding in a rotation axle direction, and supporting one end of the forcing sleeve, wherein the seal housing does not extend to a surface formed by an inner circumferential surface of the forcing sleeve opposite to an outer circumferential surface of the rotation axle;

an elastic part mounted between the seal housing and the forcing sleeve and providing a restoring force to the forcing sleeve; and

a sealing part mounted between the forcing sleeve and the seal housing and between the inner sleeve and the rotational sealing sleeve.