IP Library › Granted Patent US 12,259,043
Granted Patent B2
US 12,259,043 · App. 17/424,850 · Granted Mar 25, 2025

Sliding component

Inventor: Iwa Ou (Tokyo, JP)
Assignee: EAGLE INDUSTRY CO., LTD.
F16J15/3412F16J15/34
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Quick Facts
Patent No.
US 12,259,043
App. No.
17/424,850
Granted
Mar 25, 2025
Kind
B2
Abstract

There is provided a sliding component that supplies a sealed fluid to a leakage side in a gap between sliding surfaces to exhibit high lubricity and has a small leakage of the sealed fluid. A sliding component that has an annular shape and is disposed in a place where relative rotation is performed in a rotary machine, includes a plurality of dynamic pressure generating mechanisms provided in a sliding surface of the sliding component, each of the dynamic pressure generating mechanisms provided with a deep groove portion that communicates with a leakage side, and a shallow groove portion that communicates with the deep groove portion and extends in a circumferential direction.

Claims (40)

1. A mechanical seal comprising a stationary seal ring directly or indirectly fixed to a housing of a rotary machine and a rotating seal ring directly or indirectly fixed to a rotating shaft of the rotary machine, wherein one of an outer diameter side and an inner diameter side of the mechanical seal is a high-pressure side and remaining one of the outer diameter side and the inner diameter side is a low-pressure side, the mechanical seal is configured to prevent a sealed fluid from leaking from the high-pressure side to the low-pressure side by slidably rotating the rotating seal ring with respect to the stationary seal ring, wherein a sliding surface of one of the stationary seal ring and the rotating seal ring is provided with a plurality of dynamic pressure generating mechanisms each of which includes a deep groove portion configured to communicate with the low-pressure side and at least one shallow groove portion configured to communicate with the deep groove portion and extends in a circumferential direction, the shallow groove portion being shallower than the deep groove portion, the dynamic pressure generating mechanisms communicate with only the low-pressure side, the shallow groove portion is isolated from both the low-pressure side and the high pressure side by a land, and a radial length of the land disposed on the low-pressure side in relation to the shallow groove portion is larger than a circumferential length of the deep groove portion.

2. The mechanical seal according to claim 1 ,

wherein the deep groove portion extends in a radial direction.

3. The mechanical seal according to claim 1 ,

wherein each of the plurality of dynamic pressure generating mechanisms includes a first shallow groove portion and a second shallow groove portion configured to extend from each of the deep groove portions to both sides in the circumferential direction.

4. The mechanical seal according to claim 3 ,

wherein the plurality of dynamic pressure generating mechanisms includes a first dynamic pressure generating mechanism and a second dynamic pressure generating mechanism adjacent to each other in the circumferential direction, the first shallow groove portion of the first dynamic pressure generating mechanism is adjacent, in the circumferential direction, to the second shallow groove portion of the second dynamic pressure generating mechanism.

5. The mechanical seal according to claim 1 ,

wherein the deep groove portion is configured to communicate with an inner diameter side of the sliding component.

6. The mechanical seal according to claim 1 ,

wherein the sliding surface of the one of the stationary seal ring and the rotating seal ring is provided with a specific dynamic pressure generating mechanism that is disposed on the high-pressure side with respect to the dynamic pressure generating mechanism and is independent of the dynamic pressure generating mechanism.

7. The mechanical seal according to claim 2 ,

wherein a step in a depth direction is formed in a communication part between the shallow groove portion and the deep groove portion.

8. The mechanical seal according to claim 2 ,

wherein each of the plurality of dynamic pressure generating mechanisms includes a first shallow groove portion and a second shallow groove portion configured to extend from each of the deep groove portions to both sides in the circumferential direction.

9. The mechanical seal according to claim 8 ,

wherein the plurality of dynamic pressure generating mechanisms includes a first dynamic pressure generating mechanism and a second dynamic pressure generating mechanism adjacent to each other in the circumferential direction, the first shallow groove portion of the first dynamic pressure generating mechanism is adjacent, in the circumferential direction, to the second shallow groove portion of the second dynamic pressure generating mechanism.

10. The mechanical seal according to claim 2 ,

wherein the deep groove portion is configured to communicate with an inner diameter side of the sliding component.

11. The mechanical seal according to claim 2 ,

wherein the sliding surface of the one of the stationary seal ring and the rotating seal ring is provided with a specific dynamic pressure generating mechanism that is disposed on the high-pressure side with respect to the dynamic pressure generating mechanism and is independent of the dynamic pressure generating mechanism.

12. The mechanical seal according to claim 3 ,

wherein the deep groove portion is configured to communicate with an inner diameter side of the sliding component.

13. The mechanical seal according to claim 3 ,

wherein the sliding surface of the one of the stationary seal ring and the rotating seal ring is provided with a specific dynamic pressure generating mechanism that is disposed on the high-pressure side with respect to the dynamic pressure generating mechanism and is independent of the dynamic pressure generating mechanism.

14. The mechanical seal according to claim 4 ,

wherein the deep groove portion is configured to communicate with an inner diameter side of the sliding component.

15. The mechanical seal according to claim 4 ,

wherein the sliding surface of the one of the stationary seal ring and the rotating seal ring is provided with a specific dynamic pressure generating mechanism that is disposed on the high-pressure side with respect to the dynamic pressure generating mechanism and is independent of the dynamic pressure generating mechanism.

16. A mechanical seal comprising a stationary seal ring directly or indirectly fixed to a housing of a rotary machine and a rotating seal ring directly or indirectly fixed to a rotating shaft of the rotary machine, wherein one of an outer diameter side and an inner diameter side of the mechanical seal is a high-pressure side and remaining one of the outer diameter side and the inner diameter side is a low-pressure side, the mechanical seal is configured to prevent a sealed fluid from leaking from the high-pressure side to the low-pressure side by slidably rotating the rotating seal ring with respect to the stationary seal ring, wherein a sliding surface of one of the stationary seal ring and the rotating seal ring is provided with a plurality of dynamic pressure generating mechanisms each of which includes a deep groove portion configured to communicate with the low-pressure side and at least one shallow groove portion configured to communicate with the deep groove portion and extends in a circumferential direction, the shallow groove portion being shallower than the deep groove portion, the sliding surface of the one of the stationary seal ring and the rotating seal ring is provided with a plurality of specific dynamic pressure generating mechanisms each of which includes a deep groove portion configured to communicate with the high-pressure side, and at least one shallow groove portion configured to communicate with the deep groove portion of each of the specific dynamic pressure generating mechanisms and extends in the circumferential direction, the shallow groove portion of each of the specific dynamic pressure generating mechanisms being shallower than the deep groove portion of each of the specific dynamic pressure generating mechanisms, each of the dynamic pressure generating mechanisms has a volume which is larger than a volume of each of the specific dynamic pressure generating mechanisms, a circumferential length of the deep groove portion of each of the dynamic pressure generating mechanisms is smaller on the low-pressure side than on the high-pressure side, and the deep groove portion of each of the dynamic pressure generating mechanisms and the deep groove portion of each of the specific dynamic pressure generating mechanisms are shifted from each other in a circumferential position.

17. The mechanical seal according to claim 16 ,

wherein the deep groove portion of each of the dynamic pressure generating mechanisms extends in a radial direction.

18. The mechanical seal according to claim 16 ,

wherein a step in a depth direction is formed in a communication part between the shallow groove portion and the deep groove portion of each of the dynamic pressure generating mechanisms.

19. The mechanical seal according to claim 16 ,

wherein each of the plurality of dynamic pressure generating mechanisms includes a first shallow groove portion and a second shallow groove portion configured to extend from each of the deep groove portions to both sides in the circumferential direction.

20. The mechanical seal according to claim 19 ,

wherein the plurality of dynamic pressure generating mechanisms includes a first dynamic pressure generating mechanism and a second dynamic pressure generating mechanism adjacent to each other in the circumferential direction, the first shallow groove portion of the first dynamic pressure generating mechanism is adjacent, in the circumferential direction, to the second shallow groove portion of the second dynamic pressure generating mechanism.

21. The mechanical seal according to claim 16 ,

wherein the deep groove portion is configured to communicate with an inner diameter side of the sliding component.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 16, 2021
From: OU, IWA
To: EAGLE INDUSTRY CO., LTD.
Reel/Frame 058129/0149 →
Priority Claims (1)
JP 2019-017872 · Feb 4, 2019 · national
Continuity (1)
Related Publication 20220120315A1 · Apr 21, 2022
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First Office Action issued in Chinese Patent Appln. Serial No. 202080010628.3, dated Aug. 2, 2022, with English translation, 15 pages. [cited by applicant]
First Office Action issued in Chinese Patent Appln. Serial No. 202080010661.6, dated Jul. 19, 2022, with English translation, 15 pages. [cited by applicant]
First Office Action issued in Chinese Patent Appln. Serial No. 202080011045.2, dated Jul. 18, 2022, with English translation, 10 pages. [cited by applicant]
First Office Action issued in Chinese Patent Appln. Serial No. 202080018532.1, dated Aug. 24, 2022, with English translation, 14 pages. [cited by applicant]
European Search Report issued in related European Patent Application Serial No. 20752802.7, dated Oct. 11, 2022 (7 pages). [cited by applicant]
European Search Report issued in related European Patent Application Serial No. 20752708, dated Oct. 4, 2022 (7 pages). [cited by applicant]
European Search Report issued in related European Patent Application Serial No. 20752625, dated Oct. 4, 2022 (10 pages). [cited by applicant]
European Search Report issued in related European Patent Application Serial No. 20752802, dated Oct. 11, 2022 (7 pages). [cited by applicant]
European Search Report issued in related European Patent Application Serial No. 20752709, dated Oct. 11, 2022 (9 pages). [cited by applicant]
Office Action issued in U.S. Appl. No. 16/959,105, dated Mar. 25, 2022, 39 pages. [cited by applicant]
Notice of Allowance issued in U.S. Appl. No. 16/322,811, dated Apr. 19, 2022, 11 pages. [cited by applicant]
Notice of Allowance issued in U.S. Appl. No. 16/964,943, dated Jan. 11, 2022, 8 pages. [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2020-7022307, dated Nov. 26, 2021 with translation, 13 pages. [cited by applicant]
Official Action issued in European Patent Application Serial No. 17841422.3, dated Feb. 15, 2022, 5 pages. [cited by applicant]
Chinese Official Action issued in related Chinese Patent Application Serial No. 201980010219.0, dated Apr. 18, 2022 with translation, 17 pages. [cited by applicant]
Chinese Official Action issued in related Chinese Patent Application Serial No. 202080010586.3, dated Jan. 12, 2023 with translation, 11 pages. [cited by applicant]
Chinese Official Action issued in related Chinese Patent Application Serial No. 202080010628.3, dated Feb. 21, 2023 with translation, 14 pages. [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2021-7025489, dated Dec. 14, 2022 with translation, 23 pages. [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2021-7025490, dated Dec. 14, 2022 with translation, 10 pages. [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2021-7025491, dated Dec. 15, 2022 with translation, 12 pages. [cited by applicant]
Official Action issued in related U.S. Appl. No. 17/424,847, dated Feb. 2, 2023, 6 pages. [cited by applicant]
Chinese Official Action issued in related Chinese Patent Application Serial No. 202080018532.1, dated Feb. 17, 2023 with translation, 7 pages. [cited by applicant]
Chinese Official Action issued in related Chinese Patent Application Serial No. 202080010580.6, dated Mar. 17, 2023 with translation, 12 pages. [cited by applicant]
Chinese Official Action issued in related Chinese Patent Application Serial No. 202080011045.2, dated Jul. 14, 2023 with translation, 10 pages. [cited by applicant]
European Official Action issued in related European Patent Application Serial No. 19748058.5, dated Mar. 17, 2023 (5 pages). [cited by applicant]
Second Office Action issued in Chinese Patent Appln. Serial No. 202080011045.2, dated Apr. 20, 2023, with English translation, 10 pages. [cited by applicant]
Office Action issued in U.S. Appl. No. 17/425,281, dated May 12, 2023, 10 pages. [cited by applicant]
Office Action issued in U.S. Appl. No. 17/433,561, dated Jul. 13, 2023, 10 pages. [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2021-7025489, dated Jun. 13, 2023 with translation, 12 pages. [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2021-7005133, dated Apr. 20, 2023 with translation, 9 pages. [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2021-7025490, dated Jun. 13, 2023 with translation, 11 pages. [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2021-7025877, dated Jun. 1, 2023 with translation, 11 pages. [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2021-7025876, dated May 25, 2023 with translation, 9 pages. [cited by applicant]
Official Action issued in related U.S. Appl. No. 16/969,175, dated Aug. 1, 2023, 6 pages. [cited by applicant]
Chinese Official Action issued in related Chinese Patent Application Serial No. 202080010580.6, dated Aug. 31, 2023 with translation, 10 pages. [cited by applicant]
Chinese Official Action issued in related Chinese Patent Application Serial No. 202080011045.2, dated Oct. 23, 2023 with translation, 8 pages. [cited by applicant]
European Official Action issued in related European Patent Application Serial No. 23191029.0, dated Oct. 10, 2023 (9 pages). [cited by applicant]
Korean Official Action issued in related Korean Patent Application Serial No. 10-2021-7005133, dated Oct. 17, 2023 with translation, 11 pages. [cited by applicant]
Official Action issued in related U.S. Appl. No. 17/425,277, dated Sep. 21, 2023, 10 pages. [cited by applicant]
Official Action issued in related U.S. Appl. No. 17/425,678, dated Oct. 3, 2023, 8 pages. [cited by applicant]
Official Action issued in related U.S. Appl. No. 17/433,561, dated Oct. 27, 2023, 15 pages. [cited by applicant]
Office Action issued in U.S. Appl. No. 17/425,277, dated Mar. 13, 2023, 13 pages. [cited by applicant]
Office Action issued in U.S. Appl. No. 17/433,561, dated Mar. 27, 2023, 8 pages. [cited by applicant]
Chinese Official Action issued in related Chinese Patent Application Serial No. 202080010580.6, dated Nov. 28, 2023 with translation, 13 pages. [cited by applicant]
Office Action issued in U.S. Appl. No. 17/425,678, dated Apr. 25, 2024, 11 pages. [cited by applicant]
European Search Report issued in related European Application No. 24157823 .6, dated Jun. 13, 2024, 6 pages. [cited by applicant]
Official Action issued in related U.S. Appl. No. 17/433,561, dated Jun. 14, 2024, 9 pages. [cited by applicant]
Official Action issued in related U.S. Appl. No. 17/425,277, dated May 31, 2024, 14 pages. [cited by applicant]
Official Action issued in related U.S. Appl. No. 17/433,561, dated Sep. 18, 2024, 12 pages. [cited by applicant]
Notice of Allowance issued in U.S. Appl. No. 17/425,277, dated Sep. 25, 2024, 11 pages. [cited by applicant]
Office Action issued in U.S. Appl. No. 17/425,678, dated Sep. 18, 2024, 11 pages. [cited by applicant]
Cited By (2)
US 12,723,656 US 12,736,138