CN107899680A - A kind of ball mill stuffing seal - Google Patents

Abstract

The invention discloses a packing and sealing device for a ball mill, which comprises a case. A packing device is installed at the upper part of the case. The packing device includes a feeding hopper and a feeding barrel. The feeding hopper is located at the opening of the case and has a trapezoidal cross section. The barrel is a cylindrical barrel nested at the outlet at the bottom of the feed hopper; there is also a sealing device inside the chassis, the sealing device includes a seal seat, the seal seat is sleeved on the outer surface of the feed barrel, and the end of the through hole of the seal seat A magnetic seal assembly is socketed at the end of the feeding cylinder. The magnetic sealing assembly is facing the end of the feeding cylinder to achieve the bottom seal of the feeding cylinder. The connection between the magnetic sealing assembly and the sealing seat is lined with a ring-shaped O-ring. A blow-off device is installed, and the blow-off device is installed on the right side of the outlet of the feeding cylinder. The invention has good sealing performance, is not easy to wear and can effectively prevent dust from entering, prolongs the service life and reduces equipment maintenance costs.

Description

A ball mill packing sealing device

technical field

The invention relates to the technical field of ball mills, in particular to a ball mill packing sealing device.

Background technique

Ball mill is the key equipment for crushing materials after being crushed. It is mainly used in cement, silicate products, new building materials, refractory materials, chemical fertilizers, black and non-ferrous metal beneficiation, glass ceramics and other production industries. The poor sealing of the stuffing box between the inlet and outlet journal of the ball mill and the connecting pipeline has been a problem that has plagued the manufacturer for many years. There are mainly three sealing methods in today's ball mill packing sealing device, but each has the following disadvantages:

(1) Felt sealing device, the structure is relatively simple, but it is very easy to wear, and it cannot be compensated after wear, resulting in oil leakage, which will gradually increase until the next maintenance;

(2) The contact sealing device is simple to manufacture and install, and is easy to maintain. However, after a period of operation, the skeleton oil seal wears out, and the gap between the end cover hole and the rotating shaft increases, resulting in the throttle groove not working and easily causing leakage;

(3) The labyrinth seal is a non-contact seal. The labyrinth groove is set inside it to prevent a large amount of oil from leaking through the groove when the oil is running at high speed. A small amount of oil leakage cannot be avoided, and it is also easy for external dust to enter the equipment, causing wear and tear.

Contents of the invention

In order to overcome the shortcomings of the existing technical solutions, the present invention provides a packing sealing device for ball mills. The sealing device has good sealing performance, is not easy to wear and can effectively prevent dust from entering, prolongs the service life and reduces equipment maintenance costs.

The technical solution adopted by the present invention to solve the technical problem is: a packing sealing device for a ball mill, including a casing, the casing is a cuboid box structure with an opening facing upwards, and a packing device is installed at an upper position inside the casing, so The filling device includes a feed hopper and a feed barrel, the feed hopper is located at the opening of the cabinet and has a trapezoidal cross section, and the feed barrel is a cylindrical barrel nested at the discharge port at the bottom of the feed hopper; The casing is also equipped with a sealing device, the sealing device is sleeved on the outer surface of the feeding cylinder, the sealing device includes a sealing seat, the overall appearance of the sealing seat is a cuboid, and a through hole is dug in the center of the sealing seat. The inner diameter of the through hole of the sealing seat coincides with the outer diameter of the end of the feeding barrel, the sealing seat is sleeved on the outer surface of the feeding barrel, and a magnetic seal assembly is sleeved at the end of the through hole of the sealing seat, and the magnetic sealing assembly Facing the end of the feeding cylinder is used to realize the bottom seal of the feeding cylinder, the connection between the magnetic seal assembly and the sealing seat is lined with an annular O-ring, and a blowing device is installed under the inside of the cabinet, and The blow-off device is installed on the right side of the outlet of the feeding cylinder.

As an optional technical solution of the present invention, the magnetic seal assembly includes a magnetic static ring and a carbon dynamic ring, the cross section of the magnetic static ring is square, and the cross section of the carbon dynamic ring is an inverted "L" shape, and the magnetic static ring and the sealing seat are welded to form a rigid integrated structure, and the carbon moving ring is sleeved on the outer surface of the magnetic static ring.

As an optional technical solution of the present invention, a sealing ring is inlaid on the bottom of the contact surface between the sealing seat and the feeding cylinder, and the sealing ring is a flat ring composed of two concentric circles, and the sealing ring is closely fitted around the feeding barrel.

As an optional technical solution of the present invention, the blowing device includes a ventilation duct and a fan, the ventilation duct is in a "Z" shape, the outlet of the ventilation duct is embedded on the top of the chassis, and the other end faces the fan. The base of the fan is fixedly installed on the side of the outlet of the feed cylinder, and the height of the fan is consistent with the air inlet of the ventilation duct.

As an optional technical solution of the present invention, a decompression ring is inlaid inside the sealing device, and the decompression ring is composed of a circle of closely arranged spiral annular steel pipes connected in series through fixed pins, and the decompression ring is installed on the The upper surface of the magnetic seal assembly.

As an optional technical solution of the present invention, the outer surface of the sealing seat is sleeved with a shaft seal cavity sleeve, the shaft seal cavity sleeve is disc-shaped and a square through hole is dug in the center of the disc, and the seal sleeve The size of the square through hole is consistent with the size of the sealing seat.

As an optional technical solution of the present invention, a circular positioning hole is drilled transversely on the top side of the sealing sleeve, and an adjusting nut is inserted into the positioning hole of the sealing sleeve.

Compared with prior art, the beneficial effect of the present invention is:

(1) The present invention effectively realizes the control of raw material leakage through the application of magnetic sealing technology, the magnetic force between the dynamic and static rings is closely attracted, and the interaction and cooperation between the sealing ring and the sealing ring; and the magnetic static ring And the carbon moving ring material has a smooth surface, good thermal stability, strong wear resistance, and has a long service life;

(2) The present invention reduces the sealing pressure through the decompression ring and shaft seal cavity sleeve installed on the sealing device, effectively reduces the wear of the sealing device, makes it have a longer service life, and has a lower friction power Can reduce energy consumption;

(3) The feeding hopper, the feeding barrel and the sealing device of the sealing device of the present invention are all connected by screw sockets or bolts. The whole device is easy to disassemble and repair, and the number of maintenance is small, and the maintenance price is low, which effectively saves cost expenses;

(4) The invention adds a blowing device, the dust in the packing is driven by the fan airflow to be lifted up, and the dust is discharged through the ventilation duct, which solves the problem of dust pollution in the packing process, and is clean and environmentally friendly.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is a schematic bottom view of the structure of the present invention.

In the figure: 1-chassis; 2-filling device; 3-feed hopper; 4-feed barrel; 5-sealing device; 6-sealing seat; 7-magnetic seal assembly; 8-O-ring; 9-sealing ring 10-blowing device; 11-ventilation duct; 12-fan; 13-decompression ring; 14-adjusting nut;

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The following descriptions of various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented. The terms of direction and position mentioned in the present invention, such as "upper", "middle", "lower", "front", "rear", "left", "right", "inner", "outer", "side ", etc., are only for reference to the orientation and position of the attached drawings. Therefore, the terms of direction and position are used to illustrate and understand the present invention, but not to limit the present invention.

Example:

As shown in Figure 1 and Figure 2, the present invention provides a ball mill packing sealing device, including a case 1, the case 1 is a cuboid box structure with an opening facing upwards, and the inside of the case 1 is equipped with fillers at the upper position Device 2, the filling device 2 includes a feed hopper 3 and a feed barrel 4, the feed hopper 3 is located at the opening of the cabinet 1 and has a trapezoidal cross-section, and the feed barrel 4 is a cylindrical barrel nested in the inlet At the discharge port at the bottom of the hopper 3; the inside of the cabinet 1 is also equipped with a sealing device 5, and the sealing device 5 is sleeved on the outer surface of the feeding cylinder 4, and the sealing device 5 includes a sealing seat 6. The overall appearance of the sealing seat 6 is a cuboid, and a through hole is dug in the center of the sealing seat 6. The inner diameter of the through hole of the sealing seat 6 matches the outer diameter of the end of the feeding cylinder 4, and the sealing seat 6 is sleeved on the outside of the feeding cylinder 4. On the surface, the end of the through hole of the sealing seat 6 is sleeved with a magnetic seal assembly 7, and the magnetic seal assembly 7 is facing the end of the feeding cylinder 4 to realize the bottom sealing of the feeding cylinder 4, and the magnetic sealing assembly 7 The place connected to the sealing seat 6 is lined with an annular O-ring 8; a blow-off device 10 is installed under the interior of the cabinet 1, and the blow-off device 10 is installed on the right side of the outlet of the feeding cylinder 4 edge; the bottom of the contact surface between the sealing seat 6 and the feeding cylinder 4 is also inlaid with a sealing ring 9, and the sealing ring 9 is a flat ring composed of two concentric circles, and the sealing ring 9 is tightly fitted around the feeding around cylinder 4;

The inside of the sealing device 5 is inlaid with a decompression ring 13, and the decompression ring 13 is composed of a circle of closely arranged spiral annular steel pipes connected in series through fixing pins, and the decompression ring 13 is installed on the upper surface of the magnetic seal assembly 7 ; The decompression ring 13 mainly plays the role of throttling and decompression, which can reduce the sealing pressure of the raw material to the sealing device 5 so as to reduce the wear of the sealing ring;

The outer surface of the seal seat 6 is sleeved with a shaft seal chamber sleeve 15, the shaft seal chamber sleeve 15 is disc-shaped and a square through hole is dug in the center of the disc, the size of the square through hole of the seal shaft sleeve 15 is the same as that of the seal seat 6 are consistent in size, the top side of the sealing sleeve 15 is dug horizontally with a circular positioning hole, and the positioning hole of the sealing sleeve 15 is inserted with an adjusting nut 14;

Specific usage and features: the raw material enters the ball mill through the feeding barrel 4 after being poured from the feeding hopper 3, and when the raw material starts to enter the feeding barrel 4, the sealing device 5 starts to work, and the sealing seat 6 is used for supporting and fixing The entire sealing device, the magnetic sealing device 7 realizes the seal between the static and dynamic rings through magnetic force, the magnetic seal assembly 7 includes a magnetic static ring 701 and a carbon dynamic ring 702, the cross section of the magnetic static ring 701 is a square, The cross-section of the carbon moving ring 702 is an inverted "L" shape, and the magnetic static ring 701 and the sealing seat 6 are welded to form a rigid integrated structure, and the carbon moving ring 702 is sleeved on the outer surface of the magnetic static ring 701, wherein The position of the magnetic static ring 701 and the sealing seat 6 is relatively fixed, while the carbon dynamic ring 702 moves relative to the magnetic static ring 701, and the magnetic attraction between the magnetic static ring 701 and the carbon dynamic ring 702 ensures the bonding of the sealing surface. A friction pair is formed to realize the seal between the moving and stator, and the torque is transmitted between the carbon moving ring 702 and the magnetic static ring 701 through the O-ring 8 and the secondary sealing of the sealing ring 9 is realized;

During work, the relative position of the magnetic seal assembly 7 and the seal seat 6 can be adjusted by adjusting the nut 14, and then a pre-tightening force is given to the packing by locking the shaft seal cavity sleeve 15, and the packing generates a radial force due to deformation. force, and the radial force just decreases from the right end to the left end of the sealing device 5. On the right side, the radial force of the packing on the sealing ring 9 can be just in line with the distribution direction of the medium pressure in the axial direction, which essentially realizes an enlarged seal. force requirements;

It is further explained that the blowing device 10 is used to blow off some impurities in the raw material. The blowing device 10 includes a ventilation duct 11 and a fan 12. The ventilation duct 11 is in the shape of a "Z". The outlet of 11 is inlaid on the top of the cabinet 1, and the other end is facing the fan 12. The base of the fan 12 is fixedly installed on the side of the outlet of the feed cylinder 4, and the height of the fan 12 is consistent with the air inlet of the ventilation duct 11; The wind power of 12 is just enough to blow off the dust and other substances in the raw materials, and the blown back is discharged to the absorption device outside the box through the ventilation pipe 11, without affecting the raw materials entering the ball mill, which is clean and environmentally friendly.

In summary, the main features of the present invention are:

(1) The present invention effectively realizes the control of raw material leakage through the application of magnetic sealing technology, the magnetic force between the dynamic and static rings is closely attracted, and the interaction and cooperation between the sealing ring and the sealing ring; and the magnetic static ring And the carbon moving ring material has a smooth surface, good thermal stability, strong wear resistance, and has a long service life;

(2) The present invention reduces the sealing pressure through the decompression ring and shaft seal cavity sleeve installed on the sealing device, effectively reduces the wear of the sealing device, makes it have a longer service life, and has a lower friction power Can reduce energy consumption;

(3) The feeding hopper, the feeding barrel and the sealing device of the sealing device of the present invention are all connected by screw sockets or bolts. The whole device is easy to disassemble and repair, and the number of maintenance is small, and the maintenance price is low, which effectively saves cost expenses;

(4) The invention adds a blowing device, the dust in the packing is driven by the fan airflow to be lifted up, and the dust is discharged through the ventilation duct, which solves the problem of dust pollution in the packing process, and is clean and environmentally friendly.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. A kind of 1. ball mill stuffing seal, it is characterised in that：Including cabinet (1), the cabinet (1) is opening up length Cube body structure, the internal position by the top of the cabinet (1) be equipped with filler device (2), the filler device (2) including into Hopper (3) and feeding cylinder (4), the feed hopper (3) is located at cabinet (1) opening and cross section is trapezoidal, the feeding cylinder (4) The discharge outlet of feed hopper (3) bottom is nested in for cylindrical tube；Sealing device (5) is also equipped with inside the cabinet (1), it is described Sealing device (5) is socketed in the outer surface of feeding cylinder (4), and the sealing device (5) includes seal receptacle (6), the seal receptacle (6) Overall appearance be in cuboid, the center of seal receptacle (6), which is dug, through hole, through hole internal diameter and feeding cylinder (4) end of seal receptacle (6) End outside diameter matches, and the seal receptacle (6) is socketed in feeding cylinder (4) outer surface, the through hole end socket of the seal receptacle (6) Be magnetic seal assembly (7), and magnetic seal component (7) face feeding cylinder (4) end is used for realization the bottom of feeding cylinder (4) Sealing, the magnetic seal component (7) have the O-ring (8) of annular shape with seal receptacle (6) connecting place pad；In the cabinet (1) Blowing-down device (10) is also equipped with below portion, and the blowing-down device (10) is installed on the exit right edge of feeding cylinder (4).
2. A kind of 2. ball mill stuffing seal according to claim 1, it is characterised in that：The magnetic seal component (7) magnetic stationary ring (701) and carbon rotating ring (702) are included, the cross section that the magnetic stationary ring (701) is is square, the carbon The cross section of rotating ring (702) is inverted "L" shape, and magnetic stationary ring (701) forms rigid unitary knot with seal receptacle (6) by welding Structure, the carbon rotating ring (702) are socketed in magnetic stationary ring (701) outer surface.
3. A kind of 3. ball mill stuffing seal according to claim 1, it is characterised in that：The seal receptacle (6) with into The contact surface bottom of barrel (4) has also been inlaid with sealing ring (9), and the sealing ring (9) is the flat annulus of two concentric circles composition, And sealing ring (9) is fitted closely and is centered around around feeding cylinder (4).
4. A kind of 4. ball mill stuffing seal according to claim 1, it is characterised in that：Blowing-down device (10) bag Ventilation shaft (11) and fan (12) are included, the ventilation shaft (11) is in " Z " font, and the outlet of ventilation shaft (11) is embedded in machine At the top of case (1), other end face fan (12), the base of the fan (12) is fixedly mounted on feeding cylinder (4) outlet side, and The height of fan (12) is consistent with ventilation shaft (11) air inlet.
5. A kind of 5. ball mill stuffing seal according to claim 1, it is characterised in that：In the sealing device (5) Portion is inlaid with pressure-reducing ring (13), and the pressure-reducing ring (13) concatenates group by a compact arranged helical annular steel pipe of circle by fixed pin Into the pressure-reducing ring (13) is installed on the upper surface of magnetic seal component (7).
6. A kind of 6. ball mill stuffing seal according to claim 1, it is characterised in that：Outside the seal receptacle (6) Surface is socketed with shaft seal cavity set (15), and the shaft seal cavity set (15) is in disk form and disc centre cutting has square through hole, seals The square through hole size of axle sleeve (15) is consistent with the size of seal receptacle (6).
7. A kind of 7. ball mill stuffing seal according to claim 6, it is characterised in that：The sealing axle sleeve (15) Top side, which is laterally dug, circular locating openings, and adjusting nut (14) is plugged with the location hole of sealing axle sleeve (15).