JP2956879B2 - Disassembly inspection and maintenance method of reduction gear for vertical crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for disassembling and inspecting a speed reducer for a vertical pulverizer, and more particularly to simplify the disassembly and inspection of a speed reducer requiring a lot of time and labor for disassembling and inspecting and improving the efficiency. This is intended to shorten the operation stop time.

[0002]

2. Description of the Related Art As one type of a crusher for finely pulverizing raw materials such as limestone, slag, and cement raw material into powder, FIG.
As shown in FIG. 1, a vertical pulverizer 1 having a rotary table and a pulverizing roller is widely used. This kind of crusher
The lower part of the cylindrical casing 15 is driven by the electric motor 2B via the speed reducer 2 to rotate at a low speed and is in contact with a disc-shaped rotary table 3A, which is pressurized by a hydraulic pressure or the like at a position where the outer peripheral portion of the upper surface is equally divided in the circumferential direction. And a plurality of crushing rollers 4 that are driven and rotated.

The crushing roller 4 includes an arm 5 pivotally supported on a casing 15 by a shaft 6 and arms 7A and 7B.
Is connected to the piston rod 10 of the hydraulic cylinder 9 via the hydraulic cylinder 9. By operating the hydraulic cylinder 9, the crushing roller 4 is pressed onto the rotary table 3 </ b> A to apply crushing pressure to the raw material. 3S is a dam ring provided on the outer peripheral edge of the rotary table 3A to adjust the thickness of the raw material layer, 14 is an annular space passage for the pulverized product overflowing the rotary table 3A, 17 is a material charging chute, and 18 is an annular space passage 14
A scraper that scrapes the crushed product that has fallen into The crushed product scraped by the scraper 18 is discharged out of the machine via a discharge chute (not shown).

In such a vertical pulverizer, the raw material supplied to the center of the rotary table by the raw material charging chute 17 receives centrifugal force in the radial direction of the table by rotation of the rotary table 3A and slides on the rotary table 3A. Sometimes, a force in the rotating direction is received by the rotating table 3A, and the rotating table 3A
And a rotation somewhat slower than the rotation speed of the turntable 3A is performed. The above two forces, that is, the forces in the radial direction and the rotational direction are combined, and the raw material moves on the turntable 3A to the outer periphery of the turntable 3A in a spiral trajectory. Since a roller is pressed against this outer peripheral portion and is rotating, the raw material describing the spiral enters the crushing roller 4 and the rotary table 3A from a direction forming an angle with the roller axis direction and bites. Rarely crushed.

On the other hand, in the planetary speed reducer 2 disposed directly below the rotary table 3A, the rotary table 3A is mounted on and connected to a horizontal disk attached to an output shaft projecting from the top. The rotating force is applied to the rotary table 3A while applying the entire load transmitted through the table 3A.

[0006]

As described above, in the conventional vertical crusher 1, the rotary table 3A is directly connected to the output shaft of the speed reducer 2 which is disposed concentrically directly below the rotary table 3A. The reduction gear 2 always supports not only the weight of the rotary table 3A and the crushing roller 4 but also the crushing force urged by the hydraulic cylinder 9, so that the reduction gear 2 has a very large rigidity. It is necessary to maintain the size, which has caused a cost increase due to an increase in size. In addition, the outer circumference of the reduction gear 2 is inevitably large, and the turntable 3A
And the casing 15 fixed to the periphery thereof occupies a size protruding outside the plane projection area. Therefore, when disassembling and inspecting the reduction gear 2, a horizontal rail for moving the reduction gear 2 laterally and sliding is installed in advance, and the reduction gear 2 is slid on the rail and moved laterally. Prior to this, the crushing roller 4 in the mill was inverted to the outside, the rotary table 3A was jacked up, the rotary table 3A was separated from the speed reducer 2, and was supported by another support in a state where it was directly connected to the speed reducer 2. The electric motor 2B and the jogging motor 2A must be removed in advance, and the speed reducer 2
It was cumbersome because it was large in tons. Further, after completion of the disassembly and maintenance, the centering work with the electric motor 2B, the detachment work and the restoration work of the high-voltage cable for the electric motor 2B are complicated, and the disassembly and inspection require a lot of operation downtime.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to perform a complicated disassembly inspection and maintenance work of a speed reducer efficiently and in a short time, the present invention employs a rotary table. A plurality of rotatable crushing rollers are disposed on the upper surface of the outer peripheral portion, and the raw material supplied on the rotary table is crushed between the upper surface of the rotating table and the peripheral surface of the crushing roller by applying a predetermined pressure to the crushing roller. In a mold crusher, a reducer for applying a rotational force to the rotary table is disposed at a central portion immediately below the rotary table, and a static pressure for supporting a vertical load such as its own weight and a crushing force applied to the rotary table. Disassembly and inspection of the reduction gear of a vertical pulverizer in which a bearing is disposed directly below the pulverizing roller pressing area on the outer periphery of the rotary table, and a column base for supporting the hydrostatic bearing is provided separately from the reduction gear. Method The classification chute, the casing canopy and the raw material charging chute at the upper part of the rotary table are sequentially moved upward and removed, the side cover of the casing is removed, and the grinding roller is reversed to the outside of the mill. The pressure bearing and the column pedestal are integrally moved upward and removed, the intermediate shaft connecting the motor and the input shaft of the speed reducer is removed, and the speed reducer is horizontally moved a predetermined distance toward the anti-motor side. From above to the top, and then leave it stationary for overhaul and maintenance. Further, in the second invention, when the maintenance items of the speed reducer are limited to the input shaft system, after removing and removing the intermediate shaft connecting the electric motor and the input shaft of the speed reducer, the input from the speed reducer is removed. It was decided to take out only the shaft and disassemble and inspect the input shaft bearings.

[0008]

In the present invention, instead of the horizontal and horizontal movement of the speed reducer which has been performed so far at the time of disassembly and maintenance of the speed reducer, a method is adopted in which the speed reducer is lifted above the speed reducer and allowed to stand outside the mill. Eliminating the lateral movement of the reducer, which requires a lot of labor and time, and saving the current state of the electric motor and jogging electric motor has made it possible to perform centering work after maintenance of the electric motor and the reducer, and high pressure for the electric motor. The work of restoring the power supply wiring becomes unnecessary, the work time is greatly reduced, and the labor work is simplified because precision work is not required as in the past.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 8 relate to an embodiment of the present invention,
FIG. 1 is an overall vertical sectional view of a vertical crusher, FIG. 2 is a process diagram illustrating a disassembling operation process of a speed reducer, and FIGS. FIG. 8 is a vertical sectional view of the vertical crusher for explaining the disassembling operation of the speed reducer input shaft system. As shown in FIG. 1, in the vertical pulverizer 1 employed in the present invention, a rotary table 3A is disposed inside a vertical cylindrical casing 15 coaxially with the casing 15 so as to be rotatable about a vertical axis. A plurality (four in the embodiment of FIG. 1) of crushing rollers 4 are provided directly above the outer peripheral portion of the rotary table 3A.
Is mounted on the rotary table 3A by the hydraulic cylinder 9 via the arm 5 and the arms 7A and 7B that can swing around the rotation axis 6 of the bearing 6A installed on the top of the stand 40 formed of a double cylinder. To be driven. A donut disk-shaped flange shoe 3B is fixed below the outer peripheral portion of the turntable 3A, and as shown in FIG. 1, on a support plate 30P on the top of a column base 30 disposed inside a stand 40. The bearing is loaded on a hydrostatic bearing (thrust pad) 30a placed on the rotary table 3a, and supports a vertical load such as its own weight and a crushing force applied to the rotary table 3A. A bearing metal 32 serving as a sliding surface is attached to the upper surface of the base metal 31 of the hydrostatic bearing (thrust pad) 30a, and the lower surface of the flange shoe 3B and the hydrostatic bearing (thrust pad) 30
The upper surface of the bearing metal 32a serves as a sliding surface when the rotary table 3A rotates, and the lubrication port 3 formed in the base metal 31 is formed.
3 and lubricating oil supply via the oil supply passage 33a.

Further, as shown in FIG.
A cylindrical rotary cylinder 3C having a flange at the top is integrally provided with the rotary table 3A below the inner peripheral portion of A, and a plurality of circumferential stays 3 extending diagonally upward and inward from the column base 30 are provided.
0A, is fitted on a support ring 30b fixed in a cylindrical fixing ring 30B, and a sliding surface between the rotary cylinder 3C and the support ring 30b has a hydrostatic bearing (thrust pad) 30a. It is lubricated and lubricated like the upper surface. The roles of the upper surface of the hydrostatic bearing (thrust pad) 30a and the inner surface of the support ring 30b that form these two sliding surfaces are such that the upper surface of the hydrostatic bearing (thrust pad) 30a mainly supports a vertical load, while the support ring The inner surface 30b is to prevent the rotary table 3A from tilting or moving horizontally due to the eccentric load applied to the rotary table 3A, and to equalize the vertical load on the circumference. The static pressure bearing (thrust pad) 30
Although a may be formed in the shape of a donut disk, it is usually arranged locally just below each grinding roller 4 as described above. The thrust pad 30a is also called a hydrostatic bearing, and the material of the bearing metal 32 is white metal (WJ2), phosphor bronze, lead bronze, like the inner surface of the support ring 30b.
A cadmium alloy or the like can be adopted. The static pressure bearing (thrust pad) 30a configured as described above supports a vertical load such as its own weight and a crushing force (crushing roller pressing force) applied from the rotary table 3A, and transmits the load to the foundation through the column base 30. At the same time, the load on the speed reducer 2 is reduced, and as a result, the speed reducer 2 is reduced in size and slimmed, and the outer circumference dimension is within the range of the mill casing 15.

On the other hand, the rotary drive of the rotary table 3A is performed by rotating a spur gear screwed on the outer periphery of the top of an output shaft 2a of a speed reducer (planetary speed reducer in this embodiment) 2 disposed immediately below the center of the rotary table 3A. The vertical load applied to the rotary table 3A is not transmitted to the speed reducer 2 by being engaged with an internal gear mounted on the inner peripheral surface of the cylinder 3C. In the vertical crusher 1 of the present invention configured as described above, the turntable 3A is driven to rotate via the electric motor 2B and the speed reducer 2,
The raw material is dropped immediately before each pulverizing roller 4 via a raw material charging chute 17 and a branch pipe 17A.
A and the grinding table 4A
Overflows into the annular space passage 14 and is scraped by the scraper 18 to be discharged from the raw material discharge port to the outside of the machine. The branch pipe 17A is provided with a weir plate 17B in the lower half thereof in order to prevent abrasion of a material having high abrasion such as clinker.
Are arranged to store raw materials and form a material cushion.

A method for disassembling and inspecting the speed reducer 2 in the vertical pulverizer 1 thus constructed will be described below.
As shown in FIG. 2, in the present invention, first, the joining bolts at the upper and lower end flanges of the raw material classifying chute 50 at the upper part of the vertical crusher 1 are detached, and the material is horizontally moved by a cargo handling machine such as an overhead traveling crane. It moves (the state of FIG. 3). Next, of the casing 15 of the vertical crusher 1, the casing canopy 1
5a, the raw material charging chute 17 and the branch pipe 17A joined to and suspended in the mill are lifted together and laterally moved (the state of FIG. 4). Thereafter, the side cover, which is a penetrating portion of the crushing roller 4 into the casing 15, is detached, and as shown in FIG. 5, the crushing roller 4 is turned around the rotation axis 6 using a portable cylinder 60 and is taken out of the mill. . After such preparation work is completed, the turntable 3A and the column base 30 are integrally lifted, moved laterally and removed (FIG. 6).
State). Then, as shown in FIG. 7, after the intermediate shaft 2m connecting the output shaft of the electric motor 2B and the input shaft of the speed reducer 2 is detached in advance, the speed reducer 2 is lifted and moved laterally and settled on an appropriate level ground. , The disassembly inspection and maintenance work of the reduction gear 2 body is started. It goes without saying that the procedure of the restoration work after the maintenance is completed is performed in the reverse order of the procedure described above.

Next, when it is considered that the maintenance items of the speed reducer 2 are limited to only the input shaft 2b of the speed reducer 2 which extends to the inside of the speed reducer 2, the above-mentioned large-scale disassembly of the speed reducer 2 is not performed. There is no need to take out only the input shaft 2b for inspection and maintenance. In order to maintain such an input shaft system, as shown in FIG.
b can be easily disassembled and maintained by horizontally moving b to the motor 2B side in the axial direction and taking out the input shaft 2b. The maintenance items for the input shaft system mainly consist of two types of input bearings:
Check and repair / replace the double row cylindrical roller bearing, double row conical roller bearing, and bevel gear damage status. As described above, only the input shaft system needs to remove the intermediate shaft 2m and attach and detach the input shaft, so that the operation is further simplified.

As described above, the disassembly and inspection method of the speed reducer according to the present invention has the following advantages because it does not employ the conventional method of lateral movement that is complicated and requires a lot of time. (1) Since the reduction gear of a heavy object of 30 to 100 tons is lifted and removed without performing the difficult lateral movement, the operation time is greatly reduced (to about two thirds of the conventional case). ). (2) Precise centering work of the speed reducer and the electric motor after restoration is unnecessary. (3) Restoration of the high-voltage power supply wiring for the motor becomes unnecessary. (4) The transfer of the electric motor and the jogging electric motor becomes unnecessary. (5) There is no need to install rails for lateral movement of the speed reducer, and equipment costs are reduced. (6) The maintenance space is smaller than before.

[0015]

As described above, in the present invention,
Since the disassembling operation time of the speed reducer is greatly reduced and the disassembling operation is simplified, the maintainability is improved and the productivity is improved by shortening the operation stoppage time.

[Brief description of the drawings]

FIG. 1 is an overall vertical sectional view of a vertical crusher according to an embodiment of the present invention.

FIG. 2 is a process diagram illustrating a disassembling operation process of the speed reducer according to the embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing a state of disassembly of the speed reducer according to the embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a state of disassembly of the speed reducer according to the embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a state of disassembly of the speed reducer according to the embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing a state of a disassembly operation of the speed reducer according to the embodiment of the present invention.

FIG. 7 is a longitudinal sectional view showing a state of disassembly of the speed reducer according to the embodiment of the present invention.

FIG. 8 is a longitudinal sectional view showing a state of disassembly of a speed reducer according to another embodiment of the present invention.

FIG. 9 is an overall vertical sectional view of a conventional vertical crusher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical grinder 2 Reduction gear (planetary reducer) 2A Inching motor 2B Motor 2a Output shaft 2b Input shaft 2m Intermediate shaft 3A Rotary table 3B Flange shoe 3C Rotating cylinder 3S Dam ring 4 Crush roller 5 Arm 6 shaft (Rotary shaft) 7) Arm 7A Arm 7B Arm 9 Hydraulic cylinder 14 Annular space passage 15 Casing 15a Casing canopy 16 Discharge port 17 Material input chute 17A Branch pipe 17B Weir plate 18 Scraper 19 Discharge chute 30 Column base 30A Stay 30B Fixing ring 30P Support plate 30a Pressure bearing (thrust pad) 30b Support ring 31 Base metal 32 Bearing metal 33 Lubrication oil supply port 34 Oil supply path 40 Stand 50 Classification chute 60 Portable cylinder

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B02C 15/00-15/16

Claims (2)

(57) [Claims] 1. A plurality of rotatable crushing rollers are disposed on an upper surface of an outer peripheral portion of a rotary table, and a predetermined pressure is applied to the crushing rollers for the raw material supplied on the rotary table to apply a predetermined pressure to the rotating table. In a vertical pulverizer for pulverizing between a surface and a surface, a reducer for applying a rotational force to the rotary table is disposed at a central portion immediately below the rotary table, and the own weight and the pulverizing force applied to the rotary table, etc. A vertical pressure crusher in which a static pressure bearing for supporting the vertical load is disposed directly below the crush roller pressing area on the outer periphery of the rotary table, and a column base for supporting the static pressure bearing is provided separately from the speed reducer. A method of disassembling and inspecting a reduction gear of a machine, in which a classifying chute, a casing canopy, and a raw material charging chute at an upper portion of the rotary table are sequentially moved and removed in advance, and a casing side cover is removed. While removing and reversing the crushing roller to the outside of the mill, the rotary table, the hydrostatic bearing, and the pedestal are integrally moved upward and removed to connect the electric motor and the input shaft of the speed reducer. A method for disassembling and inspecting a speed reducer for a vertical crusher in which a shaft is removed, the speed reducer is horizontally moved to a side opposite to the electric motor by a predetermined distance, and then is moved upward and is allowed to stand still for disassembly and inspection. 2. A speed reducer for a vertical crusher for removing and removing an intermediate shaft connecting an electric motor and an input shaft of a speed reducer, then taking out only the input shaft from the speed reducer and disassembling and inspecting an input shaft bearing and the like. How to overhaul the machine.