CN108187869A - A kind of centrifugal bump pulverizer - Google Patents

Abstract

The invention discloses a centrifugal collision pulverizer. The centrifugal collision pulverizer comprises a casing, a transmission shaft and a rotating mechanism; a cylinder-shaped crushing chamber is arranged inside the casing, and the rotating mechanism is located in the crushing chamber; There are several counter-attack plates arranged in the crushing chamber, which are arranged side by side around the rotating mechanism and connected with the inner and side walls of the crushing chamber, and each counter-attack plate has multiple vertically extending protrusions; The top of the casing is provided with an opening; the transmission shaft extends into the crushing chamber through the bottom of the casing; the rotating mechanism includes a flywheel seat and a flywheel fixedly connected to each other, and the flywheel seat and the The transmission shaft is fixedly connected. The centrifugal collision pulverizer disclosed in the present invention increases the incident angle of the particles so that the particles hitting the impact plate are fragmented, at the same time, the deflection range of the movement of the particles after impact with the impact plate is expanded, so that the particles collide more fully with each other smash.

Description

A Centrifugal Collision Crusher

technical field

The invention belongs to the technical field of powder crushing, and in particular relates to a centrifugal collision pulverizer.

Background technique

At present, with the development of industrial technology, both military and civilian fields need to use crushing technology. Crushing refers to crushing raw materials into fine particles or ultrafine powders. According to the way of applying force in the crushing process, the common crushing devices can be divided into: extrusion crushing, impact crushing, shearing crushing and splitting crushing.

Contents of the invention

The purpose of the present invention is to provide a centrifugal collision pulverizer to solve the technical problem that the pulverizer in the prior art has poor pulverization effect and needs to repeat pulverization many times.

In order to achieve the above object, the present invention provides a centrifugal impact crusher, which includes a casing, a transmission shaft and a rotating mechanism; a cylindrical crushing chamber is arranged inside the casing, and the rotating mechanism is located in the In the crushing chamber; several counter-attack plates are arranged in the crushing chamber. The counter-attack plates are arranged side by side around the rotating mechanism and connected with the inner side wall of the crushing chamber. Each counter-attack plate has multiple vertical Extended protrusion; the top of the casing is provided with an opening; the transmission shaft passes through the bottom of the casing and extends into the crushing chamber; the rotating mechanism includes a flywheel seat and a flywheel that are fixedly connected to each other. The flywheel seat is fixedly connected with the transmission shaft.

Further, the cross-section of the protruding portion of the counterattack plate is semicircular or triangular or trapezoidal in shape.

Further, the flywheel includes a wheel bottom and a wheel cover arranged concentrically at intervals; the wheel bottom and the wheel cover are respectively provided with a seat hole and a feed inlet in the center; the interval between the wheel bottom and the wheel cover has a plurality of The blades arranged in the seat hole and the feed inlet, the width of the blades are equal to the distance between the flywheel and the wheel cover, and the blades extend radially along the wheel bottom and the wheel cover; the wheel bottom has a plurality of The first connection point arranged around the seat hole is staggered from the positions of the blades; the diameter of the feed opening is smaller than the diameter of the opening.

Further, the bottom of the wheel is circular; the wheel cover is in the shape of a truncated cone, and the feed inlet is located on the top surface of the truncated wheel cover and arranged concentrically with this surface.

Further, the top surface of the wheel cover also has a concentrically arranged truncated truncated flow guide part, the radius of the bottom surface of the flow guide part is smaller than or equal to the radius of the top surface of the wheel cover, and the feed inlet is located at the center of the flow guide part. Top surface; the included angle between the busbar of the guide part and the bottom surface of the guide part is greater than the included angle between the busbar of the wheel cover and the bottom surface of the wheel cover.

Further, the bottom of the flywheel has a plurality of material return ports arranged around the seat hole, and the positions of the material return ports are staggered from the blades and the first connection point.

Further, the flywheel seat includes a base and a seat head concentrically arranged from bottom to top, and the center of the bottom of the flywheel seat has a shaft hole extending through the base into the seat head; the base is disc-shaped, and the base has a plurality of rings The second connection point arranged in its center; the seat head has a frustum-shaped head crown; the diameter of the base is greater than the diameter of the bottom of the seat head; the radius of the bottom of the seat head is smaller than the radius of the connection point to the The distance from the center of the base.

Further, the top end surface of the seat head is a spherical surface.

Further, the seat head also has a connecting portion between the top of the seat head and the base, and the diameter of the connecting portion is smaller than the radius of the bottom of the seat head.

Further or preferably, the casing includes: a circular bottom plate, a top plate, and a side wall plate, the space enclosed by the bottom plate, the top plate, and the side wall plate is configured as the crushing chamber, and the counterattack plate and the side wall plate The inner surfaces of the wall plates are connected; the transmission shaft passes through the bottom plate and extends into the crushing chamber; the first opening is located on the top plate.

In the centrifugal collision pulverizer provided by the present invention, several counter-attack plates are arranged in the crushing chamber, and the counter-attack plates are arranged side by side around the rotating mechanism and connected with the inner side wall of the crushing chamber. Each of the counter-attack plates There are multiple vertically extending protrusions, which increase the incident angle of the particles, break up the particles hitting the impact plate, and expand the deflection range of the particles after impact with the impact plate, so that the particles can fully interact with each other. Crash and shatter.

Description of drawings

Figure 1 is a schematic diagram of the structure and composition of a centrifugal collision pulverizer provided by the present invention.

Fig. 2 is a perspective view of an impact plate of a centrifugal collision pulverizer provided by the present invention.

Fig. 3 is a top view of an impact plate of a centrifugal collision pulverizer provided by the present invention.

Fig. 4 is a top view of the first embodiment of the flywheel of a centrifugal impact crusher provided by the present invention.

Fig. 5 is a front view of a second embodiment of a flywheel of a centrifugal impact crusher provided by the present invention.

Fig. 6 is a top view of the second embodiment of the flywheel of a centrifugal impact crusher provided by the present invention.

Fig. 7 is a front view of a flywheel seat of a centrifugal collision mill provided by the present invention.

Fig. 8 is a top view of a flywheel seat of a centrifugal collision pulverizer provided by the present invention.

In the picture:

1. Transmission shaft 2. Crushing chamber 3. Counterattack plate 4. Opening 5. Flywheel seat 6. Flywheel 7. Bottom plate 8. Top plate 9. Side wall plate 10. Feed cylinder 11. Discharge cylinder 12. Impeller bottom 13 .Blade 51. Base 52. Seat head 53. Second connection point 54. Head crown 55. Connection part 56. Shaft hole 61. Wheel bottom 62. Wheel cover 63. Seat hole 64. Feed port 65. Blade 66. The first connection point 67. The flow guide part 68. The material return port.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Figs. 1 to 8, the centrifugal collision mill provided by the present invention includes a casing, a drive shaft 1 and a rotating mechanism; a cylindrical crushing chamber 2 is provided in the casing; the structure of the crushing chamber 2 is based on In the prior art, as in some embodiments, the casing includes a circular bottom plate 7, a top plate 8, and a side wall plate 9, and the space enclosed by the bottom plate 7, the top plate 8, and the side wall plate 9 is configured as the The crushing chamber 2; the crushing chamber 2 is provided with several counter-attack plates 3, which are arranged side by side around the rotating mechanism and connected with the inner side wall of the crushing chamber 2, because the crushing chamber 2 It is cylindrical, and its side wall is an arc surface. The counterattack plate 3 has a shape suitable for the inner side wall of the crushing chamber 2, such as an arc plate, and its outer arc is the same as the inner arc of the crushing chamber 2 ( The curvature of the inner side wall) is consistent; each of the counter-attack plates 3 has a plurality of vertically extending protrusions 31, and each protrusion 31 protrudes toward the defense line of the rotating mechanism and is parallel to each other, forming a structure similar to a ravine between them; the protrusions The shape of 31 can be any one of triangle (as shown in FIGS. 2 and 3 ), semicircle or trapezoid, which does not constitute a limitation to the present invention. The top of the casing is provided with an opening 4, which exposes the crushing chamber 2, which is used for feeding into the crushing chamber 2 and discharging the crushing chamber 2; the transmission shaft 1 passes through the The bottom of the casing extends into the crushing chamber 2; the rotating mechanism includes a flywheel seat 5 and a disc-shaped flywheel 6 fixedly connected to each other, and the flywheel seat 5 is fixedly connected with the transmission shaft 1 .

The operation process of the centrifugal collision pulverizer provided by the present invention is as follows: the flywheel 6 rotates at a high speed under the drive of the motor to generate a strong centrifugal force, a negative pressure is formed in the center of the flywheel 6, and 100 grams of Coarse powder with a particle size of less than 1mm is sucked into the crushing chamber 2, and diffuses from the center of the flywheel 6 to the surroundings under the action of centrifugal force, so that the material can obtain greater kinetic energy along with the high-speed gas in the crushing chamber, and accelerate the material. At a linear velocity of about 180m/s, the material particles are thrown to the impact plate 3 and collide with it to be crushed. At the same time, the rebound of the impact plate 3 changes the direction of motion, and then collides with other particles to be further crushed. Repeatedly, the particles They collide with each other and are crushed by various forces such as shearing and friction, and finally achieve fine crushing. The crushed materials are sucked out of the crushing chamber after the materials are qualified through process control.

The function of the counterattack plate 3 with the aforementioned settings is that since the particles receive the action of the flywheel 6, the movement track is a spiral shape that is approximately gradually diffused. It is not enough to make it fragmented, and the tendency of the movement deflection of the particles after hitting the counterattack plate 3 is not approximately rebounding and opposite to the direction of the movement of the particles afterward, but still maintains the movement trend around the crushing chamber 2. The impact plate 3 with the protruding portion 31 increases the incident angle of the particles, and at the same time, the particles hitting the impact plate 3 are fragmented, and at the same time, the movement deflection range of the particles and the impact plate 3 is expanded, so that the particles are more fully separated from each other. Crash and shatter.

The material sucked out of the crushing chamber is sorted by the cyclone equipment to sort out the escaped coarse particles and return to the opening 4. The qualified products are collected by the bag filter, and the powder with Dv97<10μm; Dv50<3.5μm can be obtained; and about 75% of the powder The particles are distributed between 1.5 μm and 8 μm, and at the same time, it can ensure that 99.9% of the powder particle size is within 30 μm.

In the centrifugal collision mill provided by the present invention, the function of the flywheel 6 is to inhale the particles by rotating to generate negative pressure, and then throw the particles to the impact plate 3 at a certain speed by the centrifugal force generated by the rotation. It can be set according to the prior art, as in one embodiment (as shown in Figure 4), the impeller type flywheel 6 is adopted, as shown in the figure, the impeller comprises a disk-shaped impeller bottom 12, and the center of the impeller bottom 12 is set There is an impeller shaft hole 56 and a plurality of second connection points 53 and blades 13 arranged around the impeller shaft hole 56, the positions of the second connection points 53 and the blades 13 are staggered from each other, and the blades 13 are arranged along the The base 12 extends radially for a length greater than the radius of the impeller base 12 . When the impeller rotates at high speed, the role of the paddle 13 is to generate negative pressure to suck the particles close to the center of the paddle 13, and then throw the particles to the front end of the paddle 13 by centrifugal force. smash.

In another preferred embodiment (as shown in FIGS. 5 and 6 ), the flywheel 6 includes a wheel bottom 61 and a wheel cover 62 arranged concentrically at intervals; Hole 63 and feed port 64; There are a plurality of blades 65 arranged around said seat hole 63 and feed port 64 in the interval between said wheel bottom 61 and wheel cover 62, and the width of said blade 65 is the same as that of said flywheel 6 The distance between the wheel cover 62 and the wheel cover 62 is equal, and the blade 65 extends radially along the wheel bottom 61 and the wheel cover 62; the blade 65 with the above-mentioned arrangement divides the interval area between the wheel bottom 61 and the wheel cover 62 into multiple A chamber, the shape of which is a sector expanding toward the edge of the flywheel 6, which opens on one side of the edge of the flywheel 6, and the side adjacent to the center of the wheel bottom 61 and the wheel cover 62 passes through the area of the seat hole 63 and the feed port 64 Interconnected; when the flywheel 6 rotates at a high speed, the paddle 13 forms a negative pressure at the feed port 64 to suck the particles into the flywheel 6 from the central area of the flywheel 6, and then the particles are accelerated to the direction of the edge of the flywheel 6 due to the centrifugal force generated by the rotation. The particles then fly out of the flywheel 6 and collide with the impact plate 3 to complete the crushing; different from the impeller-type flywheel 6 used in the prior art, the flywheel 6 provided in this embodiment does not mainly rely on the blades 65 to drive the particles to be thrown out. The function of 65 is to generate negative pressure, so that the air flows from the central area of the flywheel 6 to each chamber, and finally flows out from the edge of the flywheel 6; Expanded fan shape, a part of the particles is in contact with the paddle 13, at this time the direction of movement of this part of the particles is at a small angle with the paddle 13, and the other part of the particles is directly thrown out of the flywheel 6 without contacting the paddle 13; it is set in this way Effectively reduces the friction and collision between the particles and the impeller, so that the end of the blade 13 does not need to be provided with the same means as the wear-resistant end in the prior art, prolonging the service life of the flywheel 6 . In addition, the flywheel 6 and the wheel cover 62 also function as a fairing, which effectively reduces the air resistance of the flywheel 6 and saves the output power for driving the flywheel 6 .

The wheel bottom 61 has a plurality of first connection points 66 arranged around the seat hole 63 for fixed connection with the flywheel seat 5 , and the positions of the first connection points 66 and the blades 65 are staggered. The connection mode between flywheel 6 and flywheel seat 5 can be according to the prior art, such as adopting the mode of riveting or bolt connection.

It should be understood that the crushing process applied to the centrifugal collision grinder provided by the present invention can be divided into several times, that is, part of the particles are sucked out through the opening 4 and sorted and filtered using corresponding equipment or tools. Particles that do not meet the process requirements are returned to the centrifugal impact crusher for further crushing. The centrifugal collision mill can also include some auxiliary components, such as a cylinder-shaped feeding tube with one end connected to the feed port 64 of the flywheel 6 in some embodiments, and the other end of the feeding tube stretches out from the opening 4 to the centrifuge. For the impact crusher, the diameter of the feeding cylinder is equal to that of the feeding port 64, but smaller than the diameter of the opening 4. At the same time, a cylindrical discharge tube connected to one end and the opening 4 is also provided. The diameter of the discharge tube is equal to that of the opening 4 and forms a concentric sleeve structure with the feed tube.

As an improvement of this embodiment, the wheel base 61 is circular, the wheel cover 62 is in the shape of a truncated truncated circle, and the feed inlet 64 is located on the top surface of the truncated truncated wheel cover 62 and is connected to this surface. Concentric arrangement. The flywheel 6 arranged as above is in the shape of a disc with a protruding top, and its function is to make the height of the chamber in the flywheel 6 gradually decrease from the center area of the flywheel 6 to the edge, further compressing the air moving towards the edge of the flywheel 6, and in the process Increase its flow rate, increase the speed of particles moving with the air, and improve the effect of particle crushing.

The particles are sucked into the flywheel 6 and then move toward the edge of the flywheel 6. The direction of movement is changed from vertical to horizontal, and the turning angle is relatively large. During this process, some particles will contact the feed port 64 of the flywheel 6 and the wheel cover 62 In order to solve this problem, as a further improvement of this embodiment, the top surface of the wheel cover 62 also has a concentric frustum-shaped flow guide 67 arranged concentrically with it, and the radius of the bottom surface of the flow guide 67 is Less than or equal to the radius of the top surface of the wheel cover 62, the feed port 64 is located on the top surface of the flow guide part 67; the angle between the busbar of the flow guide part 67 and the bottom surface of the flow guide part 67 is larger than that of the wheel The included angle between the bus bar of the cover 62 and the bottom surface of the wheel cover 62, that is, the inclination degree of the bus bar of the flow guide part 67 is greater than the inclination degree of the bus bar of the wheel cover 62; the above-mentioned arrangement increases the angle between the feed port 64 of the flywheel 6 and the corner of the wheel cover 62 , effectively avoid the corner area between the feeding port 64 of the flywheel 6 and the wheel cover 62 when the particle flow is moving.

Part of the particles crushed in the crushing chamber 2 often flow into the bottom of the crushing chamber 2, that is, the gap between the flywheel 6 and the bottom surface of the crushing chamber 2. Many of the particles in this part do not meet the fineness required by the process. In order to be able to This part of the particles is effectively recovered during the crushing work. In some preferred embodiments, the bottom of the flywheel 6 has a plurality of return ports 68 arranged around the seat hole 63, and the position of the return port 68 is the same as that of the The vane 65 and the first connection point 66 are offset from each other. Flywheel 6 not only can produce negative pressure on its top when rotating at high speed, but also can produce negative pressure on the bottom; The inspection and rework after the whole crushing process is avoided.

In the centrifugal collision pulverizer provided by the present invention, as shown in FIGS. 7 and 8 , the flywheel seat 5 includes a base 51 and a seat head 52 arranged concentrically from bottom to top. The shaft hole 56 in the seat head 52; the base 51 is disc-shaped, and the base 51 has a plurality of second connection points 53 arranged around its center; it should be understood that the second connection point 53 is the same as the above-mentioned The first connecting point 66 of flywheel 6 cooperates with each other, and its position corresponds to each other; Described seat head 52 has the head crown 54 of perfect conical frustum; The diameter of base 51 is greater than the diameter of described seat head 52 bottoms; Described seat head 52 The radius of the bottom is smaller than the distance from the connection point to the center of the base 51 .

The effect of adopting the frustum-shaped head crown 54 is: when the particles are sucked into the flywheel 6, a part of the particles move to the edge of the flywheel 6 according to the working principle of the above-mentioned flywheel 6, but there is still a part of the particles that do not change significantly in the direction of motion under the action of inertia , continue to move downward until it hits the connection between the bottom 61 of the wheel and the flywheel seat 5, causing an impact on it. After the impact continues for a period of time, the connection between the flywheel 6 and the flywheel seat 5 will be destroyed, causing the flywheel 6 to loosen, affecting Flywheel 6 work efficiency, heavy then cause flywheel 6 to come off during high-speed rotation, safety accident takes place. The flywheel seat 5 with the frustum-shaped crown 54 can effectively deflect the particles, protect the connection point between the flywheel 6 and the flywheel seat 5 from being impacted by the particle flow, and eliminate potential safety hazards. It should be understood that the dimensional parameters of the frustum-shaped crown 54 are properly set by those skilled in the art according to the movement of the particle flow, and the dimensional parameters, such as the length of the generatrix or the angle between the generatrix and the horizontal plane, etc. Invention Limitations.

Its top end surface that has the conical truncated crown 54 can be a plane, and also can adopt a spherical surface. The use of a crown 54 with a spherical top can enhance the deflection effect on the particle flow. In addition, when the flywheel 6 and the flywheel seat 5 are fixedly connected to each other, the top of the spherical crown 54 can protect the hand from being scratched by the edge of the end face and can provide a support point for the hand during installation.

The seat head 52 can be set in a perfect circular truncated shape as a whole, that is, the crown 54 is directly connected with the base 51 . In some other embodiments, the seat head 52 also has a connecting portion 55, which is arranged between the crown 54 and the base 51, and its diameter may be smaller than the maximum diameter of the crown 54. The seat head 52 with the above-mentioned settings forms an overall structure similar to that of a mushroom. type structure. The crown 54 and the connecting part 55 can be set separately, or integrally formed and fixedly connected to each other. The integrally formed seat head 52 can be processed by turning process.

In this paper, specific examples are used to illustrate the inventive concept in detail, and the descriptions of the above embodiments are only used to help understand the core idea of the present invention. It should be pointed out that for those skilled in the art, any obvious modification, equivalent replacement or other improvement should be included in the protection scope of the present invention without departing from the inventive concept.

Claims (10)

1. a kind of centrifugal bump pulverizer, which is characterized in that the centrifugal bump pulverizer includes casing, transmission shaft and whirler Structure；Cylindrical is equipped in the casing and crushes chamber, the rotating mechanism is located in the crushing chamber room；In the crushing chamber room Equipped with several pieces of counterpunch boards, which is arranged in juxtaposition, and be connected with side wall in the crushing chamber room around the rotating mechanism It connects, every piece of counterpunch board has the vertically extending protruding portion of multiple tracks；The cabinet top is equipped with opening portion；The transmission shaft is worn The bottom for crossing the casing is stretched into the crushing chamber room；The rotating mechanism includes the free wheel base being mutually permanently connected and flies Wheel, the free wheel base are mutually fixedly connected with the transmission shaft.

2. centrifugal bump pulverizer according to claim 1, which is characterized in that the protrusion cross section of the counterpunch board is Semicircle or triangle or trapezoidal shape.

3. centrifugal bump pulverizer according to claim 1, which is characterized in that the flywheel includes interval arranged concentric Take turns bottom and wheel cap；The wheel bottom and wheel cap are provided with bore and feed inlet in its center respectively；The wheel bottom and the interval of wheel cap It is interior that there is multiple blades arranged around the bore and feed inlet, the spacing of the width of the blade and the flywheel and wheel cap It is equal, and the blade is radially extended along the wheel bottom and wheel cap；The wheel bottom has multiple around the of bore arrangement One tie point, first tie point are mutually staggered with the leaf position；The diameter of the feed inlet is less than the opening portion Diameter.

4. centrifugal bump pulverizer according to claim 3, which is characterized in that the wheel bottom is circle；The wheel cap is Positive truncated cone-shaped, the feed inlet be located at the top surface of the positive truncated cone-shaped wheel cap and with the face arranged concentric.

5. centrifugal bump pulverizer according to claim 4, which is characterized in that the wheel hd top face also has concentric with it The diversion division of the positive truncated cone-shaped of arrangement, the diversion division bottom surface radius are less than or equal to the wheel hd top face radius, the feed inlet Positioned at the top surface of the diversion division；The busbar of the diversion division is more than the busbar and wheel of the wheel cap with the angle of diversion division bottom surface The angle in base face.

6. centrifugal bump pulverizer according to claim 3, which is characterized in that it is characterized in that, the flywheel bottom has There are multiple returning charge mouths around bore arrangement, which mutually staggers with the blade and the first tie point.

7. centrifugal bump pulverizer according to claim 3, which is characterized in that free wheel base includes being arranged concentrically from bottom to top Base portion and seat head, the free wheel base bottom centre has extends to axis hole in seat head through base portion；The base portion is disk Shape, the base portion have multiple the second tie points around its center arrangement；The seat head has the pileum of positive truncated cone-shaped；The base The diameter in portion is more than the diameter of the seat head bottom；The radius of the seat head bottom is less than the tie point to the base portion center Distance.

8. centrifugal bump pulverizer according to claim 7, which is characterized in that the top end surface of the seat head is spherical shape Face.

9. centrifugal bump pulverizer according to claim 7, which is characterized in that the seat head, which also has, is located at the seat head Top and the base portion between connecting portion, the diameter of the connecting portion is less than the radius of the seat head bottom.

10. according to any centrifugal bump pulverizers of claim 1-9, which is characterized in that the casing includes：It is circular Bottom plate and top plate and sidewall paneling, the space that the bottom plate, top plate and sidewall paneling enclose are configured to the crushing chamber, institute The medial surface that counterpunch board is stated with the sidewall paneling is connected；The transmission shaft is stretched into across the bottom plate in the crushing chamber room； First opening is on the top plate.