JPS62216650A - Vertical grinder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a vertical crusher for crushing raw materials for cement, coal, chemicals, etc.

[Prior Art] Vertical pulverizers equipped with a rotary table and pulverizing rollers are widely used as a type of pulverizer for finely pulverizing granules such as cement raw materials, coal, and chemicals into powder. This type of crusher consists of a disk-shaped rotary table that is driven by a motor with a reducer to rotate at low speed in the lower part of a cylindrical casing, and a part that divides the outer circumference of the upper surface into equal parts in the circumferential direction, which is pressed by hydraulic pressure or the like. It is equipped with a plurality of rollers that are driven to rotate.

For example, in FIG. 2, which shows a conventional vertical crusher, the crusher, which is designated as a whole by reference numeral 1, is formed as a single tower body, and at its base is a rotary table rotated by an electric motor (motor) 2. 3 is placed. A plurality of conical crushing rollers 4 are arranged to rotate in sliding contact with this rotary table 3, and these crushing rollers 4 are rotatably supported by support arms 5. 5 is fixed at its center to a support shaft 6 which is rotatably supported on the crusher side, and furthermore, this support arm 5 extends downward through the side of a casing 8 surrounding the rotary table 3. It faces the space underneath the aircraft. The lower end of this rotary arm 7 is rotatably supported at the tip of a rod of a pressure cylinder 9 whose end is rotatably supported on the base of the crusher a1. Reference numeral 10 indicates a coupling.

And a raw material supply bag! The granules as a raw material supplied from (not shown) to the center of the rotary table 3 by t'ett are bitten between the driven roller 4 and the rotary table 3 by the rotation of the table, and are crushed. . On the other hand, hot air is guided into the casing 8 by a duct (not shown), and this hot air is directed between the outer peripheral surface of the rotary table 3 and the casing 8.
By blowing up from the hollow space 12 between the inner peripheral surface of
It is discharged from the discharge port 13 as a mixture with hot air and sent to the next process.

Note that some of the coarse particles also rise within the crusher 1, but are classified by the upper separator 14 and returned onto the rotary table 3.

Note that the rotary table 3 has a rotating shaft (not shown) extending vertically downward, and a reducer casing designated by reference numeral 2A is provided in a reducer casing to reduce the rotational force of the motor 2 and reduce the rotation of the rotary table 3. In addition to the speed reducer that transmits transmission to the shaft, a thrust bearing mechanism and a radial bearing mechanism are provided to support the rotary table 3 via its rotary shaft (none of which are shown).

[Problems to be Solved by the Invention] In a vertical crusher, the rollers crush the raw material by biting it between the table surface and the table surface, as described above, but the rollers apply appropriate pressure to the table surface. If the rollers are not pressed to the side or if the raw material is not supplied properly, the rollers will idle and the grinding efficiency will be significantly reduced.

Conventionally, as shown in FIG. 3, the roller 4 is rotatably attached to a fixed shaft 4A fixed to a support arm 5 on the outer peripheral surface of the shaft via a bearing 4B.

This bearing insertion portion is sealed with an oil seal or mechanical seal.

Generally, there are two types of oil seals: QC type and SB type. O
The C type is movable on the outer circumference and fixed on the inner circumference, and the SB type is fixed on the outer circumference and nT movable on the inner circumference.

In the conventional roller configuration, the shaft is fixed, so an OC type oil seal is used.

However, this OCC neo-oil seal is generally used for small-diameter shafts, and when manufacturing Taiko 1 crushers, so-called custom-made products must be adopted, which increases manufacturing costs and requires repair and maintenance. There are also serious difficulties in preparing replacement products.

Therefore, conventionally, in large vertical crushers, the seal of the bearing link charging part was replaced with a mechanical seal (M in Fig. 3).
However, with mechanical seals, metal plates come into contact with each other, and this abrasion powder gets into the bearing insertion part and damages the transfer surface of the rollers and poles.
There is a problem of shortening the bearing life.

[Means for Solving the Problems] In the vertical crusher of the present invention, the roller is constituted by a roller body and a shaft portion integrated with the roller body, and this shaft portion is connected to the main body of the crusher using an oil-sealed bearing. It is pivoted on the side. Further, in the vertical crusher of the present invention, the end of the shaft portion passes through the crusher casing and reaches outside the crusher.

[Function] In the present invention, the shaft portion of the roller is integrated with the roller body and rotates together.

The rotation status of the roller body can be immediately detected from the rotation status of the shaft end extended outside the crusher. It is also possible to connect a rotation speed detection device to the end of this shaft to perform reliable control.

In addition, in the present invention, since the shaft of the roller rotates, an SB type oil seal is used, which is fixed on the outer circumference and movable on the inner circumference.This SB type oil seal has a large diameter and is inexpensive. It is commercially available, and it is possible to reduce the device configuration cost.

In addition, metal powder does not get mixed into the bearing insertion part, which occurs in the case of mechanical seals, and the life of the bearing is extended.

[Example code] Examples will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a vertical crusher according to an embodiment of the present invention. The overall configuration of this vertical crusher is almost the same as the conventional vertical crusher shown in FIG. The motor 2 for driving the table, the reducer 15, and the A structure (from the support arm 5, support shaft 6, hydraulic cylinder 9, coupling 10, etc.) that supports the roller 4 and urges the roller toward the table surface. ), etc.

In this embodiment, the roller 4 includes a roller main body 4a and a shaft portion 4b that is provided integrally with the roller main body and rotates together with the roller main body.

The shaft portion 4b is rotatably supported by the support arm 5, and the shaft end extends to the outside of the crusher l by passing through the support arm 5. 15
is connected. Note that this detection device 15 is installed on a pedestal 15A fixed to the support arm 5.

FIG. 4 is a sectional view showing the support and sealing structure of the roller shaft portion 4b in the embodiment of the present invention.

Reference numeral 5a denotes the main body of the support arm 5, which is provided with a through hole 5b through which the shaft portion 4b is inserted. Bearings 16 and 17 are interposed between the outer circumferential surface of the shaft portion 4b and the interior of the through hole 5b, and support the shaft portion 4b.

To seal this bearing 16.17 charging part,
On the inner side of the crusher of the support arm 5, there is a plate S with the shaft part 4h.
A B-shaped oil seal 18 is provided.

Note that the reference numeral 19 indicates a spacer 20 wound around the shaft portion 4b.
2 is a holding plate for the oil seal 18, and 21 is a holding plate. The holding plate 21 is attached to the holding plate 20 with bolts 22, and holds the oil seal 18 therebetween.

An outer plate 23 is attached to the outside of the crusher through the through hole 5b of the support arm 5 with bolts 24, and this outer plate 23 has an insertion hole 23a for the shaft portion 4b.

Seal rings 24 and 25 perform sealing between the shaft portion 4b and the through hole 23a, and between the outer plate 23 and the through hole 5b, respectively.

In the vertical crusher having such a configuration, the rotation of the roller 4 can be continuously detected by the detection device 15, so that the raw material supply lik can be controlled and the hydraulic cylinder 9 can be controlled so that the rotation status is always optimal. Thus, the pressing force of the roller 4 on the table surface side can be adjusted. In addition, in order to adjust the raw material supply amount and roller pressing force, a detection type PJ is used.
It is preferable to provide a controller that receives the output of I5 and controls the operation of the raw material supply device Iv1 (not shown) and the hydraulic cylinder 9.

Since the bearing is sealed with an oil seal 18, unlike conventional mechanical seals, there is no possibility of abraded metal powder getting into the bearing insertion part, and the bearing life is extended.

In addition, unlike the OC type oil seal, this SB type oil seal is commercially available in various types with large diameters, and the procurement cost is low, making it possible to reduce equipment configuration costs and reducing repair costs. Effects such as easy preparation of products can be obtained.

FIG. 5 is a longitudinal sectional view showing an embodiment in which the shaft end of the roller shaft portion 4b is exposed from the support arm 5 to the outside of the crusher. In this embodiment, the rotation status of the roller body 4a can be detected by monitoring the rotation status of the shaft end. And depending on the rotation situation of this shaft end.

Adjust the raw material supply amount and the roller 4 pressing force.

In the embodiment shown in FIG. 5, although the raw material supply amount and the pressing force of the roller 4 are not automatically controlled according to the roller rotation status, the structure is simple and the practicality is extremely high.
Other configurations in the diagram are Figure 2 L + Listen 4L Ll r
im -+! I'11th k +r open-take-b-141
−＋−v ＾Explanation will be omitted.

[Effects] As described above, since the vertical crusher of the present invention can reliably detect the rotation status of the rollers, the pressing force of the rollers 4 on the table surface side can be made appropriate and the crushing efficiency can be increased. .

Further, in the present invention, by employing the SR type oil seal, it is possible to reduce the cost of the device configuration and facilitate the procurement of parts, and the life of the bearing is extended, which is highly effective in practical use.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of a vertical pulverizer according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of a conventional example, Fig. 3 is an enlarged view of the same main part, and Fig. 4 is the same as Fig. 1. FIG. 5 is a longitudinal sectional view of a vertical crusher according to another embodiment of the present invention. 1... Vertical crusher, 3... Rotary table,
4... Laura, 4a... Laura Mishiro,
4b...Roller shaft portion, 5...Support arm, 9
...Hydraulic cylinder, 15...Shaft rotation speed detection device t! t.

Claims (2)

[Claims] (1) A rotary table that is pivoted so that its upper surface is substantially horizontal and that is driven to rotate around a vertical axis by a drive device;
In a vertical crusher equipped with a crushing roller disposed in sliding contact with the rotating table, the crushing roller includes a roller body that slides in contact with the rotating table, and a shaft portion that is integrated with the roller body, 1. A vertical pulverizer, characterized in that a shaft portion is pivotally supported by an oil-sealed bearing on the main body side of the pulverizer, and an end portion of the shaft portion extends outside the pulverizer. (2) The vertical crusher according to claim 1, wherein a rotation detection device is connected to the shaft portion of the roller.