JPS6324287Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a segment seal, and an object thereof is to provide a segment seal that can be easily and safely disassembled and assembled.

Conventionally, as a segment seal mainly used for stern tube seals, as shown in Fig. 1, there is a seal ring 1 divided at several points around the circumference that makes sliding contact with the outer peripheral surface of a rotating shaft inserted into a housing, and the seal. a cover ring 2 fitted on the outer periphery of the ring 1; a key 4 supporting the cover ring 2 and the seal ring 1 with respect to the housing by a knock pin 3; and a key 4 fitted in a groove provided on the outer periphery of the cover ring 2; There is a known type of garter spring 5 that tightens and supports the seal ring 1 in the radial direction. However, such conventional segment seals
As mentioned above, in addition to the large number of component points, decomposition and
There is a risk that the seal ring 1, cover ring 2, and key 4 may come off from the knock pin 3 during assembly, and fall off when the garter spring 5 is removed.

In view of the above points, the present invention aims to provide a segment seal that eliminates the drawbacks of the prior art described above.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a partial perspective view of a segment seal according to an embodiment of the present invention. In the figure, 21 is a seal ring divided at several points around the circumference that makes sliding contact with the outer circumferential surface of a rotating shaft that is inserted into the housing, and 23 is inserted into a substantially oval insertion hole 21a bored in the axial end surface of the seal ring 21. a dowel pin having a circular head having a diameter larger than the short diameter of the substantially oval shape;
A garter spring 25 is fitted into a groove provided in the seal ring 21 and tightens and supports the seal ring 21 in the radial direction.
is attached to the outer periphery of the rotating shaft, the dowel pin 23 is inserted into the insertion hole 21a and supported on the housing, and the garter spring 25 is attached to the seal ring 21.
It is attached to the outer periphery.

The segment seal configured as described above has a seal ring 21 supported on the fixed side and a garter spring 25 that tightens and supports the seal ring 21 in the radial direction, and has a substantially oval insertion hole 21a in the seal ring 21. A dowel pin 23 having a head whose diameter is larger than the short diameter of the substantially oval shape is inserted into the insertion hole 21a, and therefore has the following features compared to conventional segment seals. That is, the number of components is small, and when disassembling and assembling the seal ring 21, the seal ring 21 is suspended by the dowel pin 23, or the head of the dowel pin 23 prevents it from being pulled out in the axial direction. There is no risk of the components falling apart as in the example. Therefore, according to the segment seal of the present invention, disassembly and assembly can be done easily and safely, and its practical effects are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of a conventional segment seal, FIG. 2 is a partial perspective view of a segment seal according to an embodiment of the present invention, and FIG. 3 is a half-section side sectional view of the same. 21... Seal ring, 21a... Insertion hole, 2
3...Knock pin, 25...Garter spring.

Claims (1)

[Scope of utility model registration request] In a segment seal that is airtightly supported on the stationary side and seals the rotating shaft by slidingly contacting the outer circumferential surface of the rotating shaft,
It has a seal ring carried on the stationary side and a garter spring that tightens and supports the seal ring in the radial direction, and the seal ring is provided with an approximately oval insertion hole, and the approximately oval insertion hole is inserted into the insertion hole. A segment seal characterized by inserting a dowel pin having a head whose diameter is larger than its short diameter.