JP2005270737A - Kneading machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable positioning of a kneading member in an axial direction to be performed with an inexpensive means in a kneading machine which is constituted by fitting the kneading member on a rotary shaft and to prevent wear of an inner peripheral surface of a packing box due to turning of a gland packing together with the rotary shaft in a kneading machine using the gland packing as a shaft sealing member of the rotary shaft. <P>SOLUTION: An outer fitting position of a sleeve 12a in the shaft direction is fixed by a level difference part 14 of the rotary shaft 2 by utilizing the sleeve 12a to be fitted on a disposing position of the gland packing 10a at a driving side of the rotary shaft 2. An end face of a paddle 3a which is fitted first is brought into contact with its end face and a paddle 3b which is fitted last thereon is tightened with a nut 15 to enable positioning of respective paddles 3 in the shaft direction to be performed with an inexpensive means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a kneader used for kneading chemicals, foodstuffs, resins and the like.

  For kneading various kneaded materials such as chemicals, foods, and resins, a kneading machine is used which is horizontally mounted in a casing and rotationally drives a rotating shaft provided with kneading members such as screws and paddles. In such a kneader, a single-shaft type in which only one rotating shaft is horizontally mounted and a rotation region of a kneading member provided on each rotating shaft with a pair of rotating shafts mounted in parallel are partly provided. There are two-axis types that overlap each other.

  In this type of kneader, one end of the rotating shaft is connected to an output shaft such as a motor or a speed reducer of the driving device, and the rotating shaft is supported only on the driving side, and is supported on both ends. There is. The drive side of the rotary shaft may be supported by the output shaft portion of the drive device. Normally, a rotary shaft that is supported only on the drive side is sealed with a shaft seal member only on the drive side, and a rotary shaft that is supported on both end sides is sealed on both ends. In order to prevent wear of the rotating shaft due to sliding contact with the shaft seal member, a sleeve is often externally fitted to the disposed portion (see, for example, Patent Documents 1 and 2).

  In the device described in Patent Document 1, a sleeve is fitted on the drive side of the rotary shaft, and a follow-up ring as a shaft seal member is disposed on the outer periphery of the sleeve. In Patent Document 2, a long sleeve is externally fitted to both ends of the rotary shaft, and a gland packing housed in a packing box as a shaft sealing member is disposed on the outer periphery of each sleeve, and a bearing is also disposed. It is shown.

  On the other hand, in such a kneader, the rotating shaft may be extracted from the casing for maintenance or cleaning, and the rotating shaft is usually extracted to the side opposite to the drive side. In some cases, a kneading member such as a screw or a paddle is externally fitted to a rotating shaft so that the kneading member can also be removed from the rotating shaft (for example, see Patent Document 2). In the case where the kneading member is externally fitted to the rotating shaft in this way, when the kneading member that has been extracted and subjected to maintenance or the like is attached to the rotating shaft again, it is necessary to position the kneading member in the axial direction. In the device described in Patent Document 2, a large-diameter portion is provided on the drive side of the rotary shaft, the end surface of the first paddle fitted from the opposite side is brought into contact with the large-diameter portion of the rotary shaft, and finally the outer surface is The fitted paddles are tightened with nuts to position the plurality of paddles on the rotary shaft.

JP-A-5-161840 (page 2-3, FIG. 1) Japanese Utility Model Publication No. 6-22419 (page 2-3, FIG. 3-4)

  As described in Patent Document 2, the means for positioning in the axial direction by abutting a paddle as a kneading member fitted on the rotating shaft with a large diameter portion provided on the driving side of the rotating shaft is a long rotation. Since it is necessary to partially form a large diameter portion on the shaft, there is a problem that the manufacturing cost of the rotating shaft increases.

  In addition, when using a gland packing for the shaft seal member of the rotating shaft, when the kneaded material is a highly adhesive resin or the like, if this highly adhesive kneaded material enters between the gland packing and the rotating shaft, There is a problem that the gland packing rotates together with the rotating shaft, and the inner peripheral surface of the packing box that stores the gland packing wears.

  Accordingly, a first problem of the present invention is to enable the axial positioning of the kneading member with an inexpensive means in a kneading machine in which the kneading member is fitted on the rotating shaft, and the second problem is to rotate the kneading member. In a kneader using a gland packing as a shaft seal member of the shaft, it is to prevent wear on the inner peripheral surface of the packing box due to the joint rotation of the gland packing.

  In order to solve the first problem, the present invention is configured to rotate a rotary shaft that is horizontally mounted in a casing and fitted with a kneading member, on the drive side of the rotary shaft that is fitted with the kneading member. In a kneader in which a sleeve is externally fitted and the drive side of the rotary shaft is sealed by a shaft sealing member provided on the outer periphery of the sleeve, the external fitting position in the axial direction of the sleeve is fixed, and the drive The structure which contact | abutted the end surface of the kneading member fitted by the said rotating shaft on the end surface on the opposite side to the side was employ | adopted.

  That is, by using a sleeve that is fitted around the shaft seal member on the rotating shaft drive side, the outer fitting position in the axial direction of the sleeve is fixed, and the sleeve is rotated on the end surface opposite to the drive side. By abutting the end face of the kneading member fitted on the shaft, the kneading member can be positioned in the axial direction by an inexpensive means.

  In order to solve the second problem, the present invention is configured to rotationally drive a rotating shaft that is installed in a casing and provided with a kneading member, and at least one end side of the rotating shaft is stored in a packing box. In the kneading machine sealed with the gland packing, a configuration in which a sleeve member was interposed between the packing box and the gland packing was adopted.

  That is, by interposing a sleeve member between the packing box and the gland packing, it is possible to prevent the inner circumferential surface of the packing box from being worn even if the gland packing rotates together with the rotating shaft.

  The kneading machine of the present invention is a kneading machine in which a kneading member is externally fitted to a rotating shaft, and a sleeve that is externally fitted to a shaft sealing member disposed on the rotating shaft drive side is utilized to Since the outer fitting position is fixed and the end surface of the kneading member fitted on the rotary shaft is brought into contact with the end surface opposite to the driving side, the kneading member is positioned in the axial direction by inexpensive means. Can do.

  In the kneading machine of the present invention, since the sleeve member is interposed between the packing box and the gland packing in the kneading machine using the gland packing as the shaft sealing member of the rotating shaft, the gland packing rotates together with the rotating shaft. However, it is possible to prevent wear on the inner peripheral surface of the packing box. When the gland packing rotates together, the interposed sleeve member is worn, but this sleeve member can be easily replaced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the kneading machine is a two-shaft type in which a pair of rotating shafts 2 are mounted in parallel in a casing 1, and each rotating shaft 2 includes a plurality of kneading members. The paddle 3 is fitted on the outside, and the rotation areas of the paddle 3 of the rotary shaft 2 partially overlap. Each rotating shaft 2 is connected to an output shaft 5 of a driving device 4 having a motor 4a and a speed reducer 4b, and the casing 1 and the driving device 4 are supported by the same base 6. This kneader kneads a kneaded material such as a highly adhesive resin, and the kneaded material is supplied from a supply port 1a provided on one end side of the casing 1 and discharged on the other end side. It is discharged from the outlet 1b.

  Each of the rotary shafts 2 is supported on the drive side by a portion of the output shaft 5 (not shown in the figure), and as shown in FIG. It is supported. Further, the rotary shaft 2 is sealed with gland packings 10a and 10b housed in packing boxes 9a and 9b on both sides of the driving side and the tip side. The gland packings 10a and 10b are fastened by the packing pressers 11a and 11b, and sleeves 12a and 12b are externally fitted to the rotary shaft 2 at the arrangement portions, and the packing boxes 9a and 9b and the gland packings 10a and 10b are fitted. Sleeve members 13a and 13b are interposed therebetween. Therefore, even if the kneaded material with high adhesiveness enters between the gland packings 10a and 10b and the sleeves 12a and 12b, and the gland packings 10a and 10b rotate together with the rotary shaft 2, the packing boxes 9a and 9b It is possible to prevent wear on the inner peripheral surface.

  Further, the sleeve 12a externally fitted to the drive side of the rotary shaft 2 is fitted and inserted from the distal end side of the rotary shaft 2 and is axially fitted by a step portion 14 provided on the drive side of the rotary shaft 2. Has been fixed. In each paddle 3, the end surface of the paddle 3 a inserted first from the front end side of the rotating shaft 2 is brought into contact with the end surface of the sleeve 12 a, and the paddle 3 b inserted last is screwed to the front end side of the rotating shaft 2. By being tightened with the nut 15, the axial positioning is performed. The positioning of each paddle 3 can be adjusted by interposing a spacer between the sleeve 12a and the paddle 3a. Further, the fixing of the outer fitting position of the sleeve 12a to the rotating shaft 2 may be performed by other means such as bolt fastening.

In the above-described embodiment, the gland packing is used for the shaft sealing member of the rotating shaft. However, in the case of the kneading machine according to the invention that addresses only the first problem that enables the axial positioning of the kneading member with inexpensive means. The shaft seal member may be another shaft seal member such as a lip seal, V packing, or O-ring, or a mechanical seal type shaft seal means may be used.

  Further, in the case of the kneader according to the invention that only addresses the second problem of preventing wear on the inner peripheral surface of the packing box due to the co-rotation of the gland packing, the kneading member such as a paddle is limited to one that fits around the rotating shaft. However, the kneading member may be formed integrally with the rotating shaft.

Longitudinal sectional view showing an embodiment of a kneader Sectional view along the line II-II in FIG. FIG. 1 is an enlarged cross-sectional view showing the main part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 1a Supply port 1b Discharge port 2 Rotating shaft 3, 3a, 3b Paddle 4 Drive device 4a Motor 4b Reducer 5 Output shaft 6 Base 7 Sleeve 8 Bearing 9a, 9b Packing box 10a, 10b Gland packing 11a, 11b Packing presser 12a, 12b Sleeves 13a, 13b Sleeve member 14 Step 15 Nuts

Claims (2)

  A rotary shaft that is horizontally mounted in the casing and externally fitted with the kneading member is rotationally driven, and a sleeve is externally fitted on the drive side of the rotary shaft with externally fitted kneading member, and is provided on the outer periphery of the sleeve. In a kneader in which the drive side of the rotary shaft is sealed by a shaft seal member, the outer fitting position in the axial direction of the sleeve is fixed, and the sleeve is fitted to the rotary shaft on the end surface opposite to the drive side. A kneader characterized in that the end face of the kneading member is in contact.   In a kneading machine in which a rotary shaft that is horizontally mounted in a casing and rotationally driven with a kneading member is rotated and at least one end side of the rotary shaft is sealed with a gland packing housed in a packing box, the packing box and the gland A kneading machine characterized in that a sleeve member is interposed between packings.

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