JPH039800Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a pulverizer that pulverizes a material to be pulverized into fine particles ranging from the order of microns to more than 10 microns.

[Conventional technology]

Conventionally, as the above-mentioned pulverizer, for example, JP-A-59
-The one published in Publication No. 105853 is known. As shown in Fig. 3, this pulverizer is equipped with a cylindrical stator 2, which has a plurality of convex blades 1 parallel to the generatrix on its inner circumferential surface, which are continuous in the circumferential direction. a cup-shaped (or cap-shaped) supply housing 4 having a supply opening 3 for a product (not shown); and a product (not shown)
Cap-shaped (or cup-shaped) with an outlet 5 of
A cylindrical rotor 9 is connected to the stator 2 and the discharge housing 6 is connected to the stator 2. It is generally constructed by fitting concentrically with a small gap (for example, 1 mm or less) therein.

In the pulverizer configured as described above, the material to be pulverized is sucked together with air into the supply housing 4 from the supply port 3 by operating a rotor-driving electric motor and a suction blower (both not shown) connected to the discharge port 5. The airflow generated by the stirring blades 10 fixed to the lower surface of the bottom wall of the rotor 9 causes the air to rise along the inner circumferential surface of the supply housing 4 into the crushing chamber formed between the stator 2 and the rotor 9. The rotor 9, which rotates at high speed, applies kinetic energy to the blades 1 of the stator 2 to crush them, and the blades 8 of the rotor 9 impact and crush them. 1 and the blade part 8 of the rotor 9 to further finely grind the air, and the discharge housing 6 is carried on an upward spiral airflow generated by the suction by the suction blower and the high speed rotation of the rotor 9. The centrifugal blades 11 fixed to the upper surface of the upper wall of the rotor 9 rotate the liquid along the inner circumferential surface of the discharge housing 6, and discharge it to the outside of the machine from the discharge port 5 to pass through a bag filter (not shown). Here, the product and air are separated, the air is exhausted to the atmosphere via a suction blower, and the product is sent from a bag filter to a hopper (not shown) for storage.

In FIG. 3, 12 is a bearing that supports the end of the rotating shaft 7, 13 is a pulley attached to the lower end of the rotating shaft 7, and the pulley 13 is interlocked with the rotor driving electric motor via a belt 14. has been done.

[Problem that the invention attempts to solve]

However, according to the above-mentioned conventional pulverizer,
Since the blade part 8 of the rotor 9 is attached to the rotor body by fasteners such as bolts, adhesive or other means, replacement work due to wear etc. is complicated, and part of the rotor 9 in the axial direction, especially the supply housing. Even if the fourth side wears unevenly, there is a problem in that the entirety must be replaced.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a pulverizer that facilitates the work of replacing blades and that can locally cope with uneven wear in the axial direction.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes a cup-shaped supply housing having a supply port at the end of a cylindrical stator having a plurality of convex blades parallel to the generatrix on the inner peripheral surface; A cup-shaped discharge housing having a discharge port is connected to the stator, and a cylindrical rotor supported by a rotating shaft and having a number of convex blades parallel to the generatrix on its outer circumferential surface is installed in the stator with a minute gap. In the pulverizer, the rotor is removably attached to the rotating shaft at a distance in the axial direction, and has an axially engaging protrusion on the outer peripheral end. A support member, a short cylindrical rotor body that is interposed between adjacent support members by being inscribed in the engagement protrusions thereof, and has a large number of grooves in the axial direction on the outer circumferential surface, and It is constituted by a large number of rectangular plate-shaped blades whose sides are engaged and whose ends are engaged with engagement protrusions of the support member.

[Effect]

According to the above means, movement of the blade body in the axial direction, radial direction, and circumferential direction with respect to the rotor body is prevented by the support member, the engagement protrusion of the support member, and the groove of the rotor body, and the support member is prevented from moving in the axial direction, radial direction, and circumferential direction. By removing the blade body, the blade body is removed from the rotor body.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 21 is a cup-shaped (or cap-shaped) supply housing placed on a base 22, and this supply housing 21 has a funnel-shaped inner peripheral wall 21a.
have. At the bottom of the supply housing 21,
A tangential supply port 23a for supplying the material to be crushed (not shown) into the machine together with air, and a spiral guide portion 23b connected to the supply port 23a are provided.

A cylindrical stator 24 is connected to the open end of the supply housing 21, and on the inner surface of the stator 24, a large number of convex blades 24a parallel to the generatrix are continuous in the circumferential direction. It is provided. Stator 24
A cap-shaped (or cup-shaped) discharge housing 25 is connected to the upper end of the discharge housing 25 . The discharge housing 25 includes a spiral guide part 26a whose minimum diameter is the inner diameter of the stator 24, and a tangential guide part 26a for discharging the product (not shown) guided with air by the guide part 26a to the outside of the machine. A discharge port 26b is provided, and a vacuum filter and a suction blower (not shown) are connected to the discharge port 26b. Further, the discharge housing 25 is provided with a hole 27 having approximately the same diameter as the inner diameter of the stator 24, and this hole 27 is closed by a removable cover plate 28.

Inside the stator 24, a cylindrical rotor 30 supported by a rotating shaft 29 is installed with a minute gap (for example, 1 mm).
(below) and are inserted concentrically. That is, the rotating shaft 29 is provided with a plurality of flanges 3 (four in this embodiment) whose diameters gradually increase toward the supply housing 21 side, except for the lowest one.
1, 32, 33, and 34 are properly spaced apart (at equal intervals in this embodiment) and fixed in the axial direction. These flanges 31, 32, 33, 34, except for the lowest one, are provided with circular plate-shaped support members 35, 36, 37, which have holes whose diameter increases in stages.
38 are removably attached via fasteners 39 such as bolts and nuts, and each support member 3
Engagement protrusions 35a, 36a, 37a, 38 protruding in the axial direction are provided at the outer peripheral ends of the 5, 36, 37, and 38.
A is provided. Between the adjacent support members 35, 36, 37, 38, short cylindrical rotor bodies 40, 41, 42 are provided with a plurality of axial grooves 40a, 41a, 42a connected in the circumferential direction on the outer peripheral surface. ,
Engaging protrusions 35a, 36a, 37a, 38 on the outer peripheral surface
It is inscribed in and interposed in a, and each rotor body 4
The grooves 40a, 41a, 42a of the grooves 0, 41, 42 are provided with adjacent support members 35, 36, 3 at both ends.
7, 38 engaging protrusions 35a, 36a, 37a, 3
Rectangular plate-shaped blade bodies 43, 44, 4 engaged with 8a
One side of 5 is engaged.

A cone-shaped protrusion 46 is provided on the lower surface of the bottom wall of the rotor 30. On the other hand, the rotating shaft 29
is supported by the cover plate 28 of the discharge housing 25 and the base 22 via bearings 47a and 47b at both ends, and a pulley 48 is attached to the end of the rotating shaft 29 protruding into the base 22. ing. and,
The pulley 48 is interlocked with a rotor driving electric motor (not shown) via a belt 49.

In addition, in FIG. 1, 50 is the supply housing 2.
1 is a hole for inspection and maintenance, which is closed by a stopper 51.

In the pulverizer with the above configuration, when the rotation drive electric motor and the suction blower are operated, the material to be pulverized is
Together with the air, it is guided spirally from the supply port 23a through the guide port 23b without changing its course suddenly, and rises while turning along the surface of the protrusion 46 at the lower end of the rotor 30, and the stator 24 and the rotor 30, and is uniformly fed to the entire circumference of the crushing chamber between the rotor 30 and the rotor 30.
It is given kinetic energy by the rotor 30 that rotates at high speed, collides with the stator 24, and is crushed.
It is also crushed by impact by the blades 43, 44, 45 of the rotor 30, and ground into finer particles between the blade 24a of the stator 24 and the blades 43, 44, 45 of the rotor 30. The waste is crushed and further ground by riding on the vortex generated between the blades 24a of the stator 24, and sent into the discharge housing 25 on an upward spiral airflow, and its course is rapidly changed by the guide portion 26a. After the product is guided in a spiral shape without any turbulence, it is discharged outside the machine from the discharge port 26b and introduced into the bag filter, where the product and air are separated, and the air is sucked and exhausted into the atmosphere through a blower. from there to a hopper (not shown) and stored there.

Therefore, the blade bodies 43, 44, 45 of the rotor 30
When replacing the ejection housing 25, first remove the cover plate 28 of the ejection housing 25, then replace the required support member 3.
5, 36, 37 from the flanges 31, 32, 33, pull out the blade bodies 43, 44, 45 upward and remove the grooves 40 of the rotor bodies 40, 41, 42.
a, 41a, 42a, and then insert new blades 43, 44, 45 into the grooves 40a, 41a, 4.
2a, and then reverse the above procedure to attach the support member 3.
5, 36, 37 and the cover plate 28 are assembled.

[Effect of idea]

As described above, according to the present invention, movement of the blade relative to the rotor body in the axial direction, radial direction, and circumferential direction is prevented by the support member, the engagement protrusion of the support member, and the groove of the rotor body, Since the blade body is removed from the rotor body by removing the support member, there is no need to attach the blade body to the rotor body using bolts or other means as in the past, and the blade body is not attached to the rotor body. Bolt-less attachment is possible, allowing attachment of a large number of blades, and easy replacement of blade bodies.

Furthermore, since the blade body is divided in the axial direction, uneven wear of the blade body in the axial direction can be locally addressed.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a pulverizer showing an embodiment of the present invention, Fig. 2 is an enlarged cross-sectional view taken along the - line in Fig. 1, and Fig. 3 is a longitudinal cross-sectional view of a conventional pulverizer. . 21... Supply housing, 23a... Supply port,
24... Stator, 24a... Blade portion, 25... Discharge housing, 26b... Discharge port, 29... Rotating shaft, 30... Rotor, 35, 36, 37, 38...
...Supporting members, 35a, 36a, 37a, 38a...
...Engagement protrusion, 39...Fastener, 40, 41, 42
...Rotor body, 40a, 41a, 42a...
groove.

Claims (1)

[Scope of utility model registration request] A cup-shaped supply housing having a supply port and a cup-shaped discharge housing having a discharge port are connected to the end of a cylindrical stator having a large number of convex blades parallel to the generatrix on the inner peripheral surface. In a pulverizer, a cylindrical rotor supported by a rotating shaft and having a number of convex blades parallel to the generatrix on its outer peripheral surface is inserted into the stator with a small gap. , the rotor is removably attached to the rotating shaft at a distance in the axial direction, and has a plurality of disc-shaped support members provided with axial engagement protrusions on the outer peripheral end thereof, and a plurality of disc-shaped support members are provided between adjacent support members. A short cylindrical rotor body is inserted in the engaging protrusion and has a large number of axial grooves on the outer circumferential surface, and one side is engaged with the groove of the rotor body, and both ends are and a large number of rectangular plate-shaped blades engaged with engagement protrusions of the support member.