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US 2019/0056030 A1Published application
Mechanical seal
AssigneeEagle Industry Co., Ltd.
InventorTetsuya IGUCHI
Life of this patent
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Abstract
A mechanical seal, which seals a sealed fluid by interposing an intermediate ring between a rotating ring and a stationary ring, includes a first annular effective seal portion where the rotating ring and the intermediate ring slide with each other and a second annular effective seal portion where the stationary ring and the intermediate ring contact with each other. A load receiving portion is arranged between the intermediate ring and the stationary ring in opposition to a side of the sealed fluid across the sealed fluid of the second annular effective seal portion in a radial direction.
Claims15
1:
- A mechanical seal that seals a sealed fluid by interposing an intermediate ring between a rotating ring and a stationary ring, said seal comprising:
- a first annular effective seal portion where the rotating ring and the intermediate ring slide with each other;
- and
- a second annular effective seal portion where the stationary ring and the intermediate ring contact with each other, the rotating ring, the intermediate ring, and the stationary ring being concentrically arranged in a state in which a radius distance of a region of the first annular effective seal portion where a pressure of the sealed fluid is applied and a radius distance of a region of the second annular effective seal portion where a pressure of the sealed fluid is applied are different from each other;
- and
- a load receiving portion arranged between the intermediate ring and the stationary ring in opposition to a side of the sealed fluid across the second annular effective seal portion in a radial direction.
3 more elements
2:
- The mechanical seal according to claim 1, wherein the load receiving portion includes a communication path communicating inside and outside sections in the radial direction
3:
- The mechanical seal according to claim 1, wherein the load receiving portion is an annular body.
4:
- The mechanical seal according to claim 1, wherein the load receiving portion is constituted of a plurality of convex members arranged at equal intervals.
5:
- The mechanical seal according to claim 1, wherein the load receiving portion is immovably arranged to the stationary ring or the intermediate ring.
6:
- The mechanical seal according to claim 1, wherein the load receiving portion is formed of a material having the same linear thermal expansion coefficient as that of the stationary ring or the intermediate ring.
7:
- The mechanical seal according to claim 2, wherein the load receiving portion is an annular body.
8:
- The mechanical seal according to claim 2, wherein the load receiving portion is constituted of a plurality of convex members arranged at equal intervals.
9:
- The mechanical seal according to claim 2, wherein the load receiving portion is immovably arranged to the stationary ring or the intermediate ring.
10:
- The mechanical seal according to claim 2, wherein the load receiving portion is formed of a material having the same linear thermal expansion coefficient as that of the stationary ring or the intermediate ring.
11:
- The mechanical seal according to claim 3, wherein the load receiving portion is immovably arranged to the stationary ring or the intermediate ring.
12:
- The mechanical seal according to claim 3, wherein the load receiving portion is formed of a material having the same linear thermal expansion coefficient as that of the stationary ring or the intermediate ring.
13:
- The mechanical seal according to claim 4, wherein the load receiving portion is immovably arranged to the stationary ring or the intermediate ring.
14:
- The mechanical seal according to claim 4, wherein the load receiving portion is formed of a material having the same linear thermal expansion coefficient as that of the stationary ring or the intermediate ring.
15:
- The mechanical seal according to claim 5, wherein the load receiving portion is formed of a material having the same linear thermal expansion coefficient as that of the stationary ring or the intermediate ring.