JP2013146675A - Slug crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a hindrance to drive force transmission from a drive means to a crusher roll caused by the influence of heat.SOLUTION: This slug crusher includes a slug hopper 13 inside a casing 11, a crusher roll 1 is rotatably provided below the slug hopper 13, fixed teeth 2 are provided laterally in an axis orthogonal direction of the crusher roll 1, a rotary shaft 5 of the crusher roll 1 is connected to an output shaft 8 of a drive means 7, drive force from the drive means 7 is transmitted to the rotary shaft 5 to rotate the crusher roll 1 around the axis, and slug having dropped from the slug hopper 13 enters between the crusher roll 1 and the fixed teeth 2, and is crushed. In the slug crusher, the rotary shaft 5 of the crusher roll 1 and the output shaft 8 of the drive means 7 are connected through a universal joint 20. Because having interposed the universal joint 20, the slug crusher can cope with a three-dimensional drastic displacement between the rotary shaft 5 of the crusher roll 1 and the output shaft 8 of the drive means 7, and a hindrance does not occur in the drive force transmission.

Description

  The present invention relates to a slag crusher that pulverizes various slags such as coal produced in a coal gasification facility.

As a conventional slag crusher, there exists a thing shown in patent document 1, for example. This slag crusher has a slag hopper for charging slag at the upper part in the casing, and a crusher roll having a large number of teeth on its outer peripheral surface is rotatably provided below the lower outlet of the slag hopper.
The rotating shaft of the crusher roll is connected to the output shaft of driving means such as an electric motor, and rotates around the axis when the driving force is transmitted.

  Further, fixed teeth having a large number of teeth on the inner surface are provided on the side of the crusher roll in the direction perpendicular to the axis. The slag dropped from the slag hopper enters between the crusher roll rotating by the driving force and the fixed teeth on the side thereof and is crushed (for example, see Patent Document 1).

  Moreover, like the slag crusher 30 shown in FIG. 4, in the casing 11, the fixed tooth | gear 2 which faces the crusher roll 1 is supported by the axis | shaft 3 provided in the upper part so that rocking is possible in the horizontal direction. The shaft 3 is disposed in parallel with the rotation shaft 5 of the crusher roll 1. The fixed tooth 2 can move in a direction approaching or leaving the side peripheral surface of the crusher roll 1 by swinging around the axis 3.

  Further, a rod (not shown) of a hydraulic cylinder is connected to the lower portion of the fixed tooth 2, and a hydraulic unit for supplying hydraulic pressure is connected to the hydraulic cylinder. For this reason, when crushing the slag, the gap between the crusher roll 1 and the fixed teeth 2 can be kept constant, and the gap can be reduced according to the change in the particle size of the slag or the occurrence of overload. It can be reduced or enlarged (see, for example, Patent Document 2).

JP-A-11-140465 JP 2000-288413 A

  According to the slag crusher 30, the rotating shaft 5 of the crusher roll 1 is connected to the output shaft 8 of the driving means 7 via the coupling mechanism 6 or in a directly connected state as shown in FIG. For this reason, there is a problem that due to the heat of the introduced slag, the gantry 12 that holds the casing 11, the driving means 7 and the like, and other constituent members of each part become high temperature, and these members expand and deform.

  If the members of each part of the slag crusher 30 expand and deform due to heat, the driving force from the driving means 7 is not easily transmitted to the rotating shaft 5 of the crusher roll 1, which is not preferable. This is because the relative positional relationship between the driving means 7 and the casing 11 changes, or the length of the rotating shaft 5 of the crusher roll 1, the output shaft 8 of the driving means 7, or the axis connecting them changes. Because it does. That is, if a general coupling mechanism 6 such as a flange-type shaft coupling is used as a shaft coupling that connects the output shaft 8 of the driving means 7 and the rotating shaft 5 of the crusher roll 1, a large amount of thermal displacement is allowed. It is difficult to let

Further, in these slag crushers 30, the degree of heat transfer from the casing 11 to the gantry 12 and the driving means 7 varies depending on the arrangement conditions and the installation structure of the gantry 12 that supports the integrally structured casing 11 and the driving means 7 and the like. is there.
Therefore, the amount of displacement of the relative positional relationship between the driving means 7 and the casing 11 or the amount of displacement such as the length of the shaft connecting the rotating shaft 5 of the crusher roll 1 and the output shaft of the driving means 7 is quantitatively determined. It is difficult to predict.

  In view of the above, an object of the present invention is to prevent the driving force from being transmitted from the driving means to the crusher roll due to the influence of heat.

  In order to solve the above-described problems, the present invention has a slag hopper in a casing, a crusher roll is rotatably provided at a lower portion of the slag hopper, and a fixed tooth is provided on a side of the crusher roll in a direction orthogonal to the axis. A rotation shaft of the crusher roll is connected to an output shaft of the driving means, and the crusher roll rotates around the axis by the driving force from the driving means being transmitted to the rotation shaft and falls from the slag hopper. In the slag crusher in which the slag enters between the crusher roll and the fixed teeth and is crushed, the rotation shaft of the crusher roll and the output shaft of the driving means are connected via a universal joint. did.

  If the rotary shaft of the crusher roll and the output shaft of the driving means are connected via a universal joint, it can cope with a large three-dimensional displacement. That is, even if a significant displacement occurs in the thermal expansion or contraction of the member or the positional relationship between the casing and the driving means, a universal joint, a so-called universal joint, can easily follow the displacement, and the crusher can move from the driving means. There is no problem in transmitting the driving force to the roll.

  In each of these configurations, the fixed tooth is provided on at least one side of the crusher roll in an axis orthogonal direction, and the rotation direction of the crusher roll by the driving means is such that the tooth positioned on the top of the crusher roll It is desirable that the configuration is a direction approaching toward the fixed tooth side.

By the way, in a conventional slag crusher in a coal gasification facility, a slag crusher (hereinafter referred to as “this machine”) in which a drive means and a casing are integrated is separated from a gasification furnace during maintenance such as overhaul and inspection. Depending on the degree of repair required, work on that floor or take it on a transport truck etc. and take it back to the factory for inspection.
At this time, the casing portion alone is balanced in weight, but the driving means causes a large weight imbalance when viewed from the entire apparatus. This is because the driving means is heavy and is in a position eccentric in the lateral direction with respect to the center of gravity of the casing (the center of gravity in the planar direction). For this reason, the operation of lowering the machine to the floor is very complicated.

  In this regard, if the connection between the rotary shaft of the crusher roll and the output shaft of the drive means is made through a universal joint as in the above configuration, the weight balance can be achieved simply by removing the joint of the universal joint during overhaul. Only the removed casing portion can be separated from the gasification furnace. Since the universal joint has a high degree of freedom of movement in three dimensions, such disconnection and connection are easy. For this reason, the operation | work which descend | falls a casing part or a drive means etc. to a floor is respectively easy.

  Further, by interposing the universal joint, it is possible to prevent the crushing vibration from the casing side from being transmitted to the entire driving device centering on the driving means such as an electric motor. This eliminates the need for vibration countermeasures for the drive means, and can eliminate drive system troubles due to vibration.

  Furthermore, since the distance between the casing and the drive means can be increased with a relatively simple structure by the intervention of a universal joint, it is less susceptible to the effects of radiant heat and heat conduction from the casing than before. It is. Further, the intervention of the universal joint increases the degree of freedom in setting the position where the driving means is arranged, and the driving means can be installed on the floor or on a stable fixed base, and the maintenance of the driving system is facilitated.

  In the present invention, since the connection between the rotating shaft of the crusher roll and the output shaft of the driving means is made through a universal joint, a large displacement is caused in the thermal expansion and contraction, or the positional relationship between the casing and the driving means. Even if it occurs, it is possible to easily follow the displacement, and it is possible to prevent the driving force from being transmitted from the driving means to the crusher roll.

Sectional drawing which shows one Embodiment of this invention Detailed view of universal joint Cross section from the side of the slag crusher Cross section of conventional example

  An embodiment of the present invention will be described with reference to FIGS. This embodiment is a slag crusher 10 used in a coal gasification facility. The main configuration is the same as that of the conventional example. A crusher roll 1 having a slag hopper 13 for charging slag at the upper part of the casing 11 and having a plurality of teeth 1a on the outer peripheral surface is provided below the lower outlet of the slag hopper 13. It is provided rotatably.

  The rotating shaft 5 of the crusher roll 1 is connected to an output shaft 8 of a driving means 7 (hereinafter referred to as “electric motor 7”) made of an electric motor, and rotates around the axis by transmitting the driving force. It has become.

  A fixed tooth 2 having a large number of teeth on the inner surface is provided on the side of the crusher roll 1 in the direction perpendicular to the axis. The slag dropped from the slag hopper 13 enters between the crusher roll 1 rotated by the driving force and the fixed teeth 2 on the side thereof and is crushed. As shown in FIG. 3, the fixed teeth 2 may be disposed on both sides of the crusher roll 1 in the direction perpendicular to the axis, but this may be one side.

  When the fixed teeth 2 are arranged on one side, the rotation direction of the crusher roll 1 is the direction in which the teeth 1a on the outer surface of the crusher roll 1 facing the fixed teeth 2 move downward from above with respect to the fixed teeth 2. That is, it is desirable that the teeth 1a located at the upper part of the crusher roll 1 are in a direction approaching the fixed teeth 2 side. Further, when the fixed teeth 2 are arranged on both sides of the crusher roll 1, the fixing is performed such that the teeth 1 a located on the upper portion of the crusher roll 1 approach the fixed teeth 2 side depending on the rotation direction of the crusher roll 1. When the tooth 2 mainly contributes to the crushing action and the crusher roll 1 is rotated in the opposite direction, the fixed tooth 2 on the opposite side mainly contributes to the crushing action.

  The fixed tooth 2 is supported to the casing 11 so as to be able to swing in the lateral direction by a shaft 3 provided on the upper portion thereof. The shaft 3 is disposed in parallel with the rotation shaft 5 of the crusher roll 1. The fixed tooth 2 can move in a direction in which its lower part approaches or separates from the tooth 1 a on the side peripheral surface of the crusher roll 1 by swinging around the axis 3.

  In addition, a buffer portion 15 including an elastic member 14 is provided on the back side of the fixed tooth 2. In this embodiment, a coil spring or the like is employed as the elastic member 14.

  The slag that is to be crushed is put into the slag hopper 13. The introduced slag is crushed between the crusher roll 1 and the fixed teeth 2 that rotate around the axis of the rotary shaft 5. The crushed slag passes through the gap between the crusher roll 1 and the fixed teeth 2 and is discharged from the discharge port 11 a below the casing 11.

  At this time, by providing the buffer portion 15 on the back surface of the fixed tooth 2, foreign matter such as an iron block is prevented from being caught between the crusher roll 1 and the fixed tooth 2 when the slag is crushed. .

  Further, by disposing a hydraulic cylinder (not shown in FIG. 3) between the lower portion of the fixed tooth 2 and the casing 11, the lower end portion of the fixed tooth 2 is advanced and retracted toward the crusher roll 1, so that the crusher roll 1 The dimension of the slag after being crushed can be arbitrarily changed by adjusting the exit interval between the slag and the fixed tooth 2. Further, if a means for detecting the current value of the electric motor 7 that rotates the crusher roll 1 is provided, the hydraulic cylinder is operated based on the current value to widen the outlet gap at the time of overload. Can be discharged. An air cylinder may be used instead of the hydraulic cylinder.

  The rotating shaft 5 of the crusher roll 1 and the output shaft 8 of the electric motor 7 are connected via a universal joint 20.

  As shown in FIGS. 1 and 2, the universal joint 20 includes a first joint portion 21, a second joint portion 22, and a connecting rod 23. The first joint portion 21 connects the rotating shaft 5 of the crusher roll 1 and one end of the connecting rod 23, and the second joint portion 22 connects the other end of the connecting rod 23 and the output shaft 8 of the electric motor 7. To connect. Further, in the middle of the connecting rod 23 in the axial direction, an extending / contracting portion 24 capable of transmitting rotation around the shaft while allowing the entire length of the connecting rod 23 to extend and contract is provided.

  As shown in FIG. 2, the first joint portion 21 and the second joint portion 22 are respectively connected to the flange 5 a on the rotating shaft 5 side of the crusher roll 1 or the flange 8 a on the output shaft 8 side of the electric motor 7. A flange yoke a, a weld yoke c fixed to one end of the connecting rod 23 by welding, and a cross-shaped cross bearing d having two orthogonal axes are provided.

  The two shafts of the cross bearing c extend radially in the four directions around the central intersection, and one of the shafts is fitted to the shaft hole provided in the flange yoke a via the bearing cup e. To do. Further, the other shaft is fitted in the shaft hole provided in the weld yoke c at both ends via the bearing cup e. Thereby, the rotating shaft 5 and the connecting rod 23, and the connecting rod 23 and the output shaft 8 can be rotated around one axis of the cross bearing d, and can also be rotated around the other axis of the cross bearing d. Is possible. As a result, the connecting rod 23 can swing (bend) with respect to the rotating shaft 5 in all directions around the axis of the rotating shaft 5. The connecting rod 23 can swing (bend) with respect to the output shaft 8 in all directions around the axis of the output shaft 8.

  The connecting rod 23 is divided into two in the middle, and consists of a member 23a on one end side and a member 23b on the other end side. The spline sleeve provided on one member 23a and the spline shaft provided on the other member 23b mesh with each other to form the expansion / contraction part 24, so that both the members 23a and 23b do not move around the axis. At this time, since both the members 23a and 23b can move in the axial direction through the spline coupling, the expansion / contraction part 24 can be easily connected to and disconnected from the rotating shaft 5 and the output shaft 8 by the connecting rod 23. It is. Further, the expansion and contraction of the member due to heat can be absorbed. In addition, the structure of the universal joint 20 is not limited to this embodiment, For example, the expansion-contraction part 24 may be abbreviate | omitted as needed. Moreover, either the 1st joint part 21 or the 2nd joint part 22 is abbreviate | omitted, and it can also be set as the structure provided with only one joint part. Conversely, a configuration in which three or more joint portions are interposed may be employed.

  As described above, the universal joint 20 is interposed between the rotating shaft 5 of the crusher roll 1 and the output shaft 8 of the driving means 7, so that a three-dimensional large-scale connection between the rotating shaft 5, the connecting rod 23, and the output shaft 8 is achieved. Can cope with various displacements. That is, even if a significant displacement occurs in the thermal expansion or contraction of the member or the positional relationship between the casing 11 and the electric motor 7, the displacement can be easily followed, and the driving force can be transmitted from the electric motor 7 to the crusher roll 1. There will be no hindrance.

  In this embodiment, the casing 11 and the gantry 12 that supports the electric motor 7 are separate bodies. For example, when the casing 11 and the gantry 12 that supports the electric motor 7 are joined by welding, the casing 11 side is This is a state in which the heat effect is easily transmitted to the electric motor 7 side. Even in such a configuration, the effect of following a predetermined displacement can be expected by interposing the universal joint 20.

  Further, the crusher roll 1 and the rotating shaft 5 are repeatedly expanded and contracted by the heat of the slag, and the casing 11 is often flange-bonded to the gasification furnace and fixed in a suspended state. It is a big state. Also in this point, the effect of following the displacement by interposing the universal joint 20 is high.

  Further, since the universal joint 20 is interposed, at the time of overhauling and inspection, only the portion of the casing 11 having a balanced weight can be separated from the gasifier only by removing the joint of the universal joint 20. Since the universal joint 20 has a high degree of freedom of movement in three dimensions, such disconnection and connection are easy. For this reason, the operation | work which drops the casing 11 part to a floor is easy.

  Further, the intervention of the universal joint 20 can prevent the crushing vibration from the casing 11 side from being transmitted to the entire drive device centered on the electric motor 7. This eliminates the need for vibration countermeasures for the drive means, and can eliminate drive system troubles due to vibration.

  Furthermore, the distance between the casing 11 and the electric motor 7 can be increased with a relatively simple configuration, for example, by relatively increasing the length of the connecting rod 23 by the intervention of the universal joint 20. For this reason, it can be made less susceptible to radiant heat and heat conduction from the casing 11 side than before, which is advantageous. Further, the presence of the universal joint 20 increases the degree of freedom in setting the position where the electric motor 7 is arranged, and the electric motor 7 can be installed on the floor or on the stable fixed mount 12 and the maintenance of the drive system is facilitated. .

  In this embodiment, the electric motor 7 is used as the driving means 7, but other means other than the electric motor 7 may be adopted.

DESCRIPTION OF SYMBOLS 1 Crusher roll 2 Fixed tooth 3 Shaft 5 Rotating shaft 6 Coupling mechanism 7 Drive means (electric motor)
8 Output shaft 10, 30 Slag crusher 11 Casing 12 Mounting base 13 Slag hopper 14 Elastic member 15 Buffer 20 Universal joint (universal joint)
21 First joint part 22 Second joint part 23 Connecting rod 24 Extendable part

Claims (2)

A casing (11) has a slag hopper (13), and a crusher roll (1) is rotatably provided at a lower portion of the slag hopper (13). (2) is provided, the rotating shaft (5) of the crusher roll (1) is connected to the output shaft (8) of the driving means (7), and the driving force from the driving means (7) is applied to the rotating shaft. The crusher roll (1) rotates around the axis by being transmitted to (5), and the slag dropped from the slag hopper (13) enters between the crusher roll (1) and the fixed teeth (2). In the slag crusher that is crushed by
The slag crusher characterized in that the rotating shaft (5) of the crusher roll (1) and the output shaft (8) of the driving means (7) are connected via a universal joint (20).   The fixed tooth (2) is provided on at least one side of the crusher roll (1) in the direction orthogonal to the axis, and the rotation direction of the crusher roll (1) by the driving means (7) is the crusher roll (1 The slag crusher according to claim 1, wherein a tooth located at an upper part of the slag is in a direction approaching toward the fixed tooth (2).

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