JP2003028574A - Rotator sealing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotator sealing system which secures airtightness of a rotator seal even in case of deformation of a rotary drum by torque and heat thereby which enhances reliability and safety. SOLUTION: The rotator sealing system 9 interposing between the rotary drum 1 and a static body 2 provides a seal plate 6 connected to the static body 2 and an expansion part 7 which is fixed on the seal plate 6 and which is elastic. The seal plate 6 is provided with a holding mechanism part 8 which regulates movements of a seal box 4. Furthermore, the expansion part 7 is connected to the seal box 4 and a sleeve 3 is fixed on the rotary drum 1. Also, the inside of the seal box 4 is provided with a seal material 5 in slide contact with the outer circumference of the fixed sleeve 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary member sealing mechanism, and more particularly to a rotary member sealing mechanism interposed between a rotary drum and a stationary member used in a rotary furnace.

[0002]

2. Description of the Related Art Generally, a hearth rotary furnace, a pipe-shaped rotary furnace,
In a rotary furnace such as a kiln drum furnace, the rotary cylinder and a stationary body are sealed by a rotary body sealing mechanism interposed therebetween.

Here, both the rotary cylinder and the stationary body are supported on the base, but the rotary cylinder is deformed in the axial direction or the radial direction by the rotational force, heat, or the like.

Therefore, the relative positional relationship between the rotary drum and the stationary body may change due to such deformation, and in this case, it becomes difficult to seal the two.
The amount of deformation of the rotary cylinder increases as the diameter of the rotary cylinder increases and as the temperature of the rotary cylinder increases. As a result, it becomes more difficult to seal the two. Further, even if the operating pressure of the rotary cylinder is increased by negative pressure or pressurization, and the pressure difference between the inside and outside of the seal becomes large, the sealing between the rotary cylinder and the stationary body becomes difficult.

[0005]

A blade type seal made of spring steel is known as a seal mechanism for solving such a problem (Japanese Patent Laid-Open No. 60-159585).

However, since the vane type seal structure made of spring steel is a structure in which the spring plates are attached to the rotary drum one by one, the gaps between the spring plates and the spring plates overlap each other. However, there is a large amount of leakage from the gap between the spring plate and the rotating drum due to the difference in curvature, and it is very difficult to obtain a highly airtight seal mechanism. The present invention has been made in consideration of such points,
An object of the present invention is to provide a rotating body sealing mechanism that secures airtightness of a seal between a rotating body and a stationary body even when the rotating body is deformed by a rotating force and heat, and improves reliability and safety. .

[0007]

According to the present invention, in a rotary member sealing mechanism interposed between a rotary drum and a stationary member, a sealing plate connected to the stationary member and an expandable expansion fixed to the sealing plate. And a seal box connected to the expansion section, a sleeve fixed to the rotating barrel, and a seal member fixed in the box and slidingly contacting the outer circumference of the sleeve. .

According to the present invention, in a rotary body sealing mechanism interposed between a rotary body and a stationary body, a seal plate connected to the rotary body, an expandable portion fixed to the seal plate and expandable and contractible. A rotary body sealing mechanism comprising: a connected seal box; a sleeve fixed to a stationary body; and a seal member fixed in the seal box and slidingly contacting the outer circumference of the sleeve.

According to the present invention, even if the rotary drum is deformed by the rotating force and heat, the airtightness of the rotary body seal interposed between the rotary drum and the stationary body is ensured, and the reliability of the rotary body sealing mechanism is improved. It can improve security and safety.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a first embodiment of a rotary member seal mechanism according to the present invention.

As shown in FIG. 1, a rotary body sealing mechanism 9 according to the present invention is provided between a rotary cylinder 1 and a stationary body 2 provided in a rotary furnace such as a hearth rotary furnace, a pipe rotary furnace, or a kiln drum furnace. Is intervened in. Such a rotating body sealing mechanism 9
Is a seal plate 6 connected to the stationary body 2 by a bolt 11, an expandable and contractible expansion part 7 fixed to the seal plate 6, a seal box 4 connected to the expansion part 7, and a flange part of the rotary drum 1. Bolt 11 to 10
And a sleeve 3 connected by. In the seal box 4, a seal material 5 that slidably contacts the outer circumference of the sleeve 3
Is fixed, and the sleeve 3 has a sleeve body 3a and a heat insulating material 17a provided on the inner circumference of the sleeve body 3a. Further, a holding mechanism portion 8 that restricts the operation of the seal box 4 is attached to the seal plate 6.

The holding mechanism 8 includes a fixed shaft 12 provided on the seal plate 6, a pair of support plates 15 and 15 connected to the outer periphery of the fixed shaft 12, and the support plate 1.
It has a pair of sliding plates 14 and 14 provided between 5 and 15. A bearing 13 is provided between the sliding plates 14,
By tightening the nuts 16, the pair of support plates 1
The bearing 13 is fixed by 5 and 15.

The seal box 4 includes a pair of support plates 1
Engagement portions 4 a and 4 b are provided which are inserted between Nos. 5 and 15 and engage with the outer circumference of the fixed shaft 12. The distance between the pair of support plates 15 is adjusted by tightening or loosening the nut 16.

By the way, as shown in FIG. 2 and FIG.
The holding mechanism unit 8 includes a rotation torque support unit 18 and a distance holding unit 19.
It consists of Of these, the one having the bearing 13 on the outer periphery of the fixed shaft 12 is the rotational torque support portion 18, and the bearing 13 of this rotational torque support portion 18 is engaged with the engaging portion 4a having an outward opening. It looks like this.

On the other hand, the distance holding portion 19 is the fixed shaft 12
No bearing 13 is provided on the outer periphery of the fixed shaft 12, and the outer periphery of the fixed shaft 12 is engaged with the engaging portion 4b having a closed outer shape.

As shown in FIGS. 2 and 3, one engaging portion 4a is provided on the outer periphery of the seal box 4, and three engaging portions 4b are provided on the outer periphery of the seal box 4, thus a total of four engaging portions 4a and 4b. Is provided.

The seal member 5 is fixed to the seal box 4 by the seal holder 30 held by the nut 30a and the screw 30b. As such a sealing material 5, a carbonized fiber packing capable of withstanding a high temperature of about 300 to 500 degrees, Mark 3-6711 (trade name of Nippon Pillar Co., Ltd.), or the like can be used. Further, as the heat insulating material 17a, glass felt, ceramic felt, or the like can be used.

Next, the operation of the embodiment having such a configuration will be described.

As shown in FIG. 1, when the rotary drum 1 rotates, the rotary drum 1 is deformed, and the rotary drum 1 is thermally deformed by the heat generated by the high temperature gas in the rotary drum 1 on the rotary furnace side. When the rotary cylinder 1 is thus deformed, the sleeve 3 is displaced in the radial direction and the axial direction.

When the sleeve 3 is displaced in the radial direction and the axial direction, the seal box 4 also follows, and accordingly, the expansion portion 7 expands and contracts in the axial direction and the radial direction. As a result, the airtightness of the rotary member sealing mechanism 9 can be secured, and the reliability and safety can be improved. Further, by providing the distance holding portion 19, the pair of support plates 15 restrict the axial movement of the engaging portion 4b, and the distance between the seal box 4 and the seal plate 6 can be always kept constant. In addition, the rotation torque support 1
By providing 8, the radial movement of the engaging portion 4a is restricted by the bearing 13. At the same time, when an excessive torque is applied to the seal box 4, the rotation torque support portion 18 can hold the torque applied to the seal box 4 and protect the expansion portion 7. In this way, the movement of the seal box 4 is restricted by the holding mechanism portion 8 including the rotation torque support portion 18 and the distance holding portion 19, so that the seal material 5 can be prevented from coming off from the seal box 4, and the rotating body can be prevented. The safety and reliability of the seal mechanism 9 can be improved. Further, the heat insulating material 17a of the sleeve 3 can suppress the heat transferred to the sealing material 5 due to the high temperature gas in the rotary drum 1. As a result, since the temperature of the seal material 5 can be kept low, the wear characteristics of the seal material 5 can be improved and the life of the seal material 5 can be extended.

Further, as shown in FIG. 3, a plurality of rotational torque supporting portions 18 and distance holding portions 19 are installed in the circumferential direction of the seal box 4 so that the rotational body 1 can be moved in the radial and axial directions. The displacement can be effectively suppressed.

Second Embodiment FIG. 4 is a diagram showing a third embodiment of the present invention. As shown in FIG. 4, the rotary body seal mechanism 9 interposed between the rotary body 1 and the stationary body 2 includes a seal plate 6 connected to the rotary body 1 by bolts 11, and a seal plate 6 fixed to the seal plate 6 to expand and contract. Flexible expansion part 7 and expansion part 7
The seal box 4 connected to the
A sleeve 3 fixed by 1 is provided, and a seal member 5 which is in sliding contact with the outer circumference of the sleeve 3 is fixed in a seal box 4.

Further, the seal box 4 is provided with a holding mechanism portion 8 for restricting the operation of the seal plate 6.

The holding mechanism portion 8 is slidably provided so as to penetrate the wall surface 4c of the seal box 4, and the movable shaft 12a abutting the seal plate 6 and the wall surface 4c of the seal box 4 on the outer periphery of the movable shaft 12a. It has a pair of sliding plates 14 mounted with the pair of sliding plates 14 in between, and a pair of support plates 15 mounted on the outer periphery of the movable shaft 12a outside the pair of sliding plates 14. On the outer periphery of the movable shaft 12a,
Further, a pair of spring holders 21 each having a built-in spring (biasing means) 20 are attached, one spring 20 is arranged between the support plate 15 and the seal plate 6, and the other spring 20 is supported. It is arranged between the plate 15 and a nut 16 attached to the movable shaft 12a.

The other structure is substantially the same as that of the first embodiment shown in FIG. 4, the same parts as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

By tightening the nut 16 of the holding mechanism portion 8, the elastic force of the spring 20 is determined, and thus the frictional resistance force between the tip portion 12b of the movable shaft 12a and the seal plate 6 is determined. The torque generated by the sliding resistance between the sleeve 3 and the seal member 5 is supported by the friction resistance between the tip portion 12b of the movable shaft 12a and the seal plate 6. Therefore, the movable shaft 12a
When an excessive torque is applied to the seal box 4, the holding mechanism section 8 holds the torque by adjusting the frictional resistance force between the tip portion 12b and the seal plate 6, and the expansion section 7 is appropriately protected. can do. Also,
Since the movement of the seal box 4 is restricted by the holding mechanism portion 8, it is possible to prevent the seal material 5 from coming off from the seal box 4, and it is possible to improve the safety and reliability of the rotary body seal mechanism 9. .

Third Embodiment FIG. 5 is a diagram showing a third embodiment of the present invention. In FIG. 5, a heat insulating part 17 fixed to the seal plate 6 is provided between the stationary body 2 and the seal plate 6.

The other structure is substantially the same as that of the first embodiment shown in FIG. 5, the same parts as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted.

In FIG. 5, the heat insulating portion 17 can keep the temperature of the sealing material 5 low and improve the wear characteristics, and as a result, the life of the sealing material 5 can be extended.

[0031]

As described above, according to the present invention, in the rotating body sealing mechanism, the seal box is displaced against the displacement in the radial direction and the axial direction due to the deformation of the rotating drum due to the rotating force and heat. You can follow. As a result, it is possible to improve the airtightness of the seal between the rotary drum and the stationary body, which leads to the improvement of the reliability and safety of the rotary body sealing mechanism.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of a rotary member sealing mechanism according to the present invention.

FIG. 2 is a view showing a holding mechanism section.

FIG. 3 is a diagram showing a plurality of holding mechanism units installed.

FIG. 4 is an overall configuration diagram showing a second embodiment of a rotary member sealing mechanism according to the present invention.

FIG. 5 is an overall configuration diagram showing a third embodiment of a rotary member sealing mechanism according to the present invention.

[Explanation of symbols]

1 rotating body 2 stationary body 3 sleeves 3a Sleeve body 4 seal box 4a engaging part 4b engaging part 5 Seal material 6 seal plate 7 Expansion Department 8 Holding mechanism 9 Rotor seal mechanism 10 Flange part 11 Volts 12 fixed shaft 12a movable shaft 12b Movable shaft tip 13 bearings 14 sliding plate 15 Support plate 16 nuts 17 Thermal insulation 17a insulation 18 Rotational torque support 19 Distance holding unit 20 springs 21 spring holder 30 seal holder 30a nut 30b screw

Continued front page    (72) Inventor, Katsu Ide             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office F term (reference) 3J043 AA03 AA16 BA05 CA12 CB06                       DA02 DA05 DA09 FA03 FA09                       FB20 HA05                 4K061 AA08 AA10 CA21                 4K063 AA18 AA19 CA01 CA02 DA22

Claims (7)

[Claims] 1. A rotating body sealing mechanism interposed between a rotating body and a stationary body, wherein a sealing plate connected to the stationary body, an expansion part fixed to the sealing plate and expandable and contractible, and connected to an expansion part. A rotary body sealing mechanism, comprising: a seal box; a sleeve fixed to the rotary cylinder; and a seal member fixed in the seal box and slidingly contacting the outer circumference of the sleeve. 2. The rotating body sealing mechanism according to claim 1, wherein the sealing plate is provided with a holding mechanism portion that regulates the operation of the sealing box. 3. The holding mechanism section has a fixed shaft provided on the seal plate and a pair of support plates connected to the outer periphery of the fixed shaft. The seal box is inserted between the pair of support plates. The rotating body sealing mechanism according to claim 2, further comprising an engaging portion that engages with the fixed shaft. 4. The rotary member sealing mechanism according to claim 1, wherein the sleeve has a sleeve body and a heat insulating material provided on an inner surface of the sleeve body. 5. The rotating body sealing mechanism according to claim 1, wherein a heat insulating portion is interposed between the stationary body and the sealing plate. 6. A rotary body sealing mechanism interposed between a rotary body and a stationary body, wherein a seal plate connected to the rotary body, an expansion part fixed to the seal plate and expandable and contractible, and connected to an expansion part. A rotary body sealing mechanism comprising: a seal box; a sleeve fixed to a stationary body; and a seal member fixed in the seal box and slidingly contacting the outer circumference of the sleeve. 7. The rotary member seal mechanism according to claim 1, wherein the expansion portion is expandable / contractible in the axial direction and the radial direction of the rotary drum.