JP2008106832A - Sealing arrangement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing arrangement providing use of a seal ring for a long time even under harsh conditions such as dry sliding in a high temperature of about 150°C. <P>SOLUTION: A kneading device is provided with: a kneading tank 1 holding kneading material; a pair of rotor drive shafts 2 piercing a side wall of the kneading tank; and rotors 3 connected to the rotor drive shafts and kneading the kneading material in the kneading tank. It is comprised of a cylindrical seal holder arranged in a through hole neighborhood of the rotor drive shaft of the side wall and held in a gap between the side hole and the rotor drive shaft via a bolt screwed in a side wall side, and the seal ring made of PEEK material arranged between an axial end of the seal holder and a collar part provided on the rotor, and pressed against a collar part end face by the seal holder. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a sealing device.
The present invention also relates to a sealing device used for kneading materials to be kneaded such as rubber.

As shown schematically in FIGS. 2 and 3, this type of sealing device includes a kneading material containing a kneaded material. The kneading device uses a shaft sealing device that penetrates the casing side wall and protrudes out of the casing. A rotor 300 having a pair of rotor drive shafts 200 penetrating through the side wall 110 of the kneading tank 100 and the kneading tank 100, connected to the rotor drive shaft 200, and kneading the kneaded material in the kneading tank 100; When the kneaded material is kneaded, the kneaded material is put into the kneading tank 100 by an appropriate means with the pressure lid 550 opened, the pressure lid 550 is lowered, and the rotor drive shaft 200 is mixed. The kneaded material is kneaded by rotationally driving the rotor 300 by driving means such as a motor connected to the motor.
In addition, the rotor drive shaft 200 used as a pair may use the other as a driven shaft by using a coupling means such as a gear.

  The sealing device is provided with a seal ring 800 around the entire periphery of the tip of the seal retainer 500 provided in the vicinity of the through hole of the rotor drive shaft 200 on the side wall 110, and the seal retainer 500 is fixed via a bolt 600.

  The kneaded material kneaded in the kneading tank 100 by tightening the nut 601 and pressing it with the spring force of the spring means 130 and pressing the end surface of the seal ring 800 of the sealing device against the flange 700 of the rotor 300. Is prevented from leaking outside.

Thus, the material to be sealed is a high-viscosity material such as rubber, and the material is mixed in a sealed space called a kneading tank while mechanically applying shear stress.
For this reason, the environment where the seal ring 800 is used is a severe condition of dry sliding at a high temperature around 150 ° C.
And when a chip | tip etc. generate | occur | produced in the seal ring 800, the problem that a foreign material mixes in the kneading | mixing material has arisen.

Conventionally, a phenol resin reinforced with asbestos has been used as a material for this kind of seal ring 800.
However, the use of asbestos has been withdrawn due to human health damage.
Therefore, a phenol resin with a base fabric was used as an alternative material.
However, the phenolic resin with the base fabric was insufficient in strength, and the seal ring 800 had to be replaced in 2 to 3 weeks.
Moreover, since phenomena such as chipping and cracking also occurred, there was a problem of foreign matter mixing into the kneaded material.
An attempt was also made to use PTFE material, but the heat resistance was not sufficient and could not be used.
JP 2004-169716 A

  The present invention has been made in view of the above problems, and the main technical problem is that the seal ring is at a high temperature of around 150 ° C., even under the harsh conditions of dry sliding. To provide a sealing device that can be used for a long time.

  The sealing device of the present invention includes a kneading tank for storing a kneading material, a rotor driving shaft that passes through a side wall of the kneading tank, and a pair of rotor driving shafts, and is coupled to the rotor driving shaft, and kneading the kneading material in the kneading tank. A kneading device including a rotor that is disposed in a space between the side wall and the rotor drive shaft via a bolt that is disposed in the vicinity of the through hole of the rotor drive shaft on the side wall and is screwed to the side wall side. Made of PEEK material that is arranged between the held cylindrical seal presser and the axial end of the seal presser and the flange provided on the rotor, and pressed against the end of the flange by the seal presser It is characterized by comprising a seal ring.

  According to the sealing device of the first aspect of the invention, a stable sealing function can be exhibited for a long time under the severe condition of dry sliding at a high temperature of around 150 ° C.

Moreover, according to the sealing device of the invention described in claim 2, a more stable sealing function can be exhibited.
Furthermore, according to the sealing device of the invention described in claim 3, it is possible to exhibit an optimum function for the seal ring.

Furthermore, according to the sealing device of the invention described in claim 4, when worn, it is economical because only the wear ring plate needs to be replaced.
Furthermore, according to the sealing device of the invention described in claim 5, the life of the sealing device can be greatly extended.

Furthermore, according to the sealing device of the invention described in claim 6, abnormal wear does not occur between the seal presser and the seal ring.
Further, according to the sealing device of the seventh aspect of the invention, it is possible to more reliably prevent the rotation between the seal presser and the seal ring.

Furthermore, according to the sealing device of the invention described in claim 8, the pressing force against the seal ring can be maintained appropriately.
Furthermore, according to the sealing device of the ninth aspect of the invention, the maintenance of the seal ring can be easily performed.
Furthermore, according to the sealing device of the invention described in claim 10, there is no adverse effect on the material to be kneaded.

FIG. 1 shows a schematic configuration of a sealing device according to the present invention.
That is, the kneading apparatus in which the sealing device of the present invention is used includes a kneading tank 1 for storing the kneaded material, a rotor driving shaft 2 that forms a pair through the side wall 11 of the kneading tank 1, and the rotor driving shaft 2. The rotor 3 is connected and kneaded with a kneading material such as rubber in the kneading tank 1.
In the vicinity of the through hole 4 of the rotor drive shaft 2 on the side wall 11, a cylindrical seal presser held in the gap between the side wall 11 and the rotor drive shaft 2 via a bolt 6 screwed to the side wall 11 side. 5 and a seal ring 8 made of PEEK material which is disposed between the axial end of the seal retainer 5 and the flange 7 provided on the rotor 3 and is pressed against the end surface of the flange 7 by the seal retainer 5. Has been placed.

Here, PEEK is an abbreviation for polyether ether ketone, but various fillers can be contained.
As the seed filler, fiber fillers (glass fiber, carbon fiber, etc.) and solid lubricant fillers (PTFE, graphite, molybdenum disulfide, etc.) are used. In particular, fiber fillers are used. Is preferred.
And by filling PEEK with a filler, the heat resistance and wear resistance of PEEK can be improved.
The amount of the filler to be filled is 10 to 60 wt%, preferably 20 to 40 wt% with respect to 100 wt% of the PEEK material.

Further, a wear ring plate 9 as a separate member is attached to the collar portion 7 that slides with the seal ring 8.
For this reason, when it wears out, it is only necessary to replace the wear ring plate 9, and it is not necessary to replace the entire collar portion 7.
In particular, when the wear ring plate 9 is made of a cemented carbide material, it can withstand long-term use, which is preferable.

Furthermore, between the seal ring 8 and the seal retainer 5, a pin 121 provided at the end of the seal retainer 5 and a hole 122 for receiving the pin 121 provided in the seal ring 8 are provided, and the anti-rotation means 12. Is provided.
As a result, even if a large sliding resistance is generated between the seal ring 8 and the wear ring plate 9, no sliding occurs between the seal ring 8 and the seal retainer 5.
A spring means 13 is arranged between the bolt 6 and the seal presser 5.
The spring ring 13 is used to elastically press the seal ring 8 toward the flange 7 side.
The pressing force of the spring means 13 can be adjusted by a nut 61 screwed into a bolt.
Further, since the seal ring 8 is divided into two in the radial direction, maintenance is easy.

  The present invention is not limited to the best mode for carrying out the invention described above, and various other configurations can be adopted without departing from the gist of the present invention.

The fragmentary sectional view which shows schematic structure of the sealing device which concerns on this invention. The fragmentary sectional view which shows schematic structure of the sealing device which concerns on a prior art. Front sectional drawing of a kneading apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Kneading tank 2 ... Rotor drive shaft 3 ... Rotor 4 ... Through-hole 5 ... Seal retainer 6 ... Bolt 7 ... Saddle 8 ... Seal ring 9 ... Wear ring plate 11 ... Side wall 12 · · · Rotation prevention means 13 · · · Spring means

Claims (10)

A kneading tank (1) for storing the kneading material, a rotor drive shaft (2) that penetrates the side wall (11) of the kneading tank (1), and a pair of the rotor drive shaft (2); A kneading apparatus comprising a rotor (3) for kneading a kneaded material in a kneading tank (1), disposed near the through hole (4) of the rotor drive shaft (2) of the side wall (11), A cylindrical seal presser (5) and the seal presser held in a gap between the side wall (11) and the rotor drive shaft (2) via a bolt (6) screwed to the side wall (11) side. PEEK disposed between the axial end of (5) and the flange (7) provided on the rotor (3) and pressed against the end surface of the flange (7) by the seal presser (5) A sealing device comprising a seal ring (8) made of a material.   2. Sealing device according to claim 1, characterized in that the seal ring (8) is made of PEEK material containing filler.   The sealing device according to claim 1 or 2, wherein the amount of the filler is 10 to 60 wt% with respect to 100 wt% of the PEEK material.   A separate wear ring plate (9) is attached to the flange (7) that slides with the seal ring (8) so that the seal ring (8) slides between the seal ring (8) and the wear ring plate (9). The sealing device according to any one of claims 1 to 3, wherein the sealing device is formed.   The sealing device according to claim 1, wherein the wear ring plate is made of a cemented carbide material.   The sealing device according to any one of claims 1 to 5, wherein a rotation prevention means (12) is provided between the seal ring (8) and the seal presser (5).   The rotation prevention means (12) includes a pin (121) provided at an end of the seal presser (5) and a hole (122) for receiving the pin (121) provided in the seal ring (8). The sealing device according to any one of claims 1 to 6, wherein the sealing device is provided.   The seal ring (8) is elastically pressed toward the flange portion (7) by a spring means (13) disposed between the bolt (6) and the seal presser (5). The sealing device according to any one of claims 1 to 7.   The sealing device according to claim 1, wherein the seal ring is divided into two in the radial direction.   The sealing device according to any one of claims 1 to 9, wherein the material to be kneaded in the kneading tank (1) is a rubber compound.

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