CN213801604U - Unloader drive mechanism - Google Patents

Abstract

The utility model discloses a transmission mechanism of a discharging machine, wherein two ends of a rotating shaft (14) extending out of a shell end cover (2) are respectively supported by a rolling bearing (5); the outer surface of a center hole matched with the rotating shaft (14) of the shell end cover (2) is provided with a sealing ring (10), and the sealing ring (10) is fastened on the shell end cover (2) through a sealing ring sealing flange (18). By adopting the technical scheme, dust is prevented from entering the bearing, abrasion and faults are reduced, and the service life is prolonged; the rotation is flexible, the transmission power loss is small, and the mechanical efficiency is improved; the bearing is not required to be offline when replaced, the maintenance is convenient and quick, and the operation and maintenance cost is reduced.

Description

Unloader drive mechanism

Technical Field

The utility model belongs to the technical field of material conveying system's rotatory feeding equipment, especially, relate to a star type unloader slewing mechanism.

Background

The star-shaped unloading machine is also called as a star-shaped or rotary unloader, an unloading valve, a feeder, a feeding valve and an air locking valve, is uniform and continuous unloading equipment for powdery, granular or blocky non-viscous materials, and is widely applied to industries such as metallurgy, building materials, electric power, chemical industry, grain, environmental protection and the like. As shown in fig. 1, the star unloader generally includes a casing 3, a casing liner 4, an end cover 1, a rotary shaft 2, a slide bearing 9, an impeller 5 (or a rotary drum); the rotating shaft 2 is arranged on the end cover 1 through a sliding bearing 9; the end cover 1 and the shell 3 are sealed by graphite packing 7 and packing pressing ring 8. The impeller 5 and the casing 3 are sealed by an impeller lining plate 6.

Because the fit clearance of slide bearing and pivot is little, and the rotational friction resistance is big, and bearing and axle journal easily produce wearing and tearing to cause fit clearance increase, dust entering, pivot subsides, sealed leakage, leak hunting leak grey, the pivot sweeps the thorax with the casing in serious time, the card dies, even the motor burns out or the end cover is scrapped, not only leads to slewing mechanism fault rate to increase, life shortens, greatly influences stable in process moreover, reduces work efficiency, pollutes the operation environment, increases fortune dimension cost.

In addition, the existing unloader generally adopts a driving mode that a single speed reducer is connected with a rotating shaft through chain transmission or the output end of the speed reducer is directly connected with the rotating shaft, the speed reducer can be stopped for a long time when in failure, the rotating shaft is supported on the end covers at two sides of the shell through sliding bearings embedded in the end covers, and the disassembly and assembly workload of the rotating shaft or the bearing during maintenance and replacement is large and consumes a long time.

At present, some enterprises change the sliding bearing arranged in the end cover into a rolling bearing, and the sliding bearing is still in direct contact with materials in the machine, so that dust enters and overflows; some enterprises move the sliding bearing originally installed in the end cover to the outside of the shell and install the sliding bearing in the bearing seat, and the problems of inflexible rotation of the bearing, large contact abrasion with the shaft neck and poor stability of a rotating mechanism also exist.

The prior art has searched for the following patent documents:

chinese patent No. CN202897414U discloses a star-shaped toothed roller ash discharger; the Chinese patent with the publication number of CN203247199U discloses an improved star-shaped ash discharger for a lime shaft kiln flue gas recovery carbon dioxide mixed burning kiln; the rear is a supplementary design of the former, the technical scheme is only suitable for the ash discharging machine with the external dimension fixed as phi 770 multiplied by 620, although the parts of the two ends of the rotating shaft, which are exposed out of the end covers, are respectively arranged on the bearing seats, the end covers are integrally assembled with the bearing seats, the mounting positions of the bearing seats on the rotating shaft cannot be rapidly adjusted, so that the abrasion caused by the long-term fixation of the contact surfaces of the bearings and the rotating shaft is reduced, the left end and the right end of the rotating shaft are respectively connected with the speed reducer of the ash discharging machine and the rotating shaft of the ash discharging machine through chain wheels, the direct connection with an output shaft to drive the rotating shaft when the speed reducer or chain transmission is damaged is not considered, and the production can be recovered after the damaged spare parts are maintained or replaced.

In conclusion, the sliding bearing and the rotating shaft of the star-shaped unloading machine in the prior art have the problems of quick abrasion, short service life, poor performance, low work efficiency, high failure rate and difficult maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model provides an unloader drive mechanism, its purpose is to improve the life of bearing.

In order to realize the purpose, the utility model discloses the technical scheme who takes does:

the utility model discloses a transmission mechanism of a discharging machine, wherein the discharging machine comprises a shell, a shell end cover, a rotating shaft and an impeller; two ends of the rotating shaft extending out of the end cover of the shell are respectively supported by rolling bearings; the outer surface of the center hole matched with the end cover of the shell and the rotating shaft is provided with a sealing ring, and the sealing ring is fastened on the end cover of the shell through a sealing flange of the sealing ring.

The rolling bearing is arranged in the bearing seat; the bearing seat is fixedly arranged on the bearing seat upper bracket, and the bearing seat upper bracket is fixedly arranged on the bearing seat bracket base; the bearing seat support base is fixedly arranged on the machine shell end cover.

And a chain wheel used for connecting a speed reducer is arranged between the bearing seat at one end of the rotating shaft and the sealing flange of the sealing ring, and the chain wheel is fixedly connected with the rotating shaft.

And positioning sleeves are respectively arranged on the rotating shafts between the chain wheel and the bearing block and between the chain wheel and the shell end cover, so that the axial positioning of the chain wheel is realized.

And a shaft end protective sleeve or a connecting piece connected with an output shaft of the speed reducer is arranged at the end part of the rotating shaft opposite to the end part where the chain wheel is installed.

The sealing material between the sealing ring sealing flange and the sealing ring is a graphite packing.

The upper bracket of the bearing seat adopts an I-shaped steel structure; the base of the bearing seat bracket adopts a channel steel structure or an angle steel structure; the bearing seat upper bracket is connected with the bearing seat bracket base through bolts.

And the top end of the bearing seat is provided with an oil nozzle.

The rolling bearing adopts a cylindrical roller bearing, and the nominal width of the cylindrical roller bearing is 64 mm.

By adopting the technical scheme, the utility model can prevent dust from entering the bearing, reduce abrasion and faults and prolong the service life; the rotation is flexible, the transmission power loss is small, and the mechanical efficiency is improved; the bearing is not required to be offline when replaced, the maintenance is convenient and quick, and the operation and maintenance cost is reduced; the sealing performance of the unloader is improved, the fluctuation of the air pressure in the unloader is avoided, the stable production process is ensured, and the environmental pollution caused by the overflow of dust in the unloader is avoided; due to multiple transmission modes, the unloading interruption time can be shortened when a fault occurs, and the working efficiency of the unloader is improved; simple structure, good stability, reasonable design, easy manufacture and convenient maintenance.

Drawings

The contents of the drawings and the reference numbers in the drawings are briefly described as follows:

FIG. 1 is a schematic structural view of a star-type unloader in the prior art;

FIG. 2 is a schematic structural view (front side) of a star-type unloader according to the present invention;

fig. 3 is a schematic structural view (side) of the star-type unloading machine of the present invention.

The labels in fig. 1 are:

1. end cover, 2, rotating shaft, 3, casing, 4, casing lining board, 5, impeller (or drum), 6, drum lining board, 7, graphite filler, 8, filler clamping ring, 9 and sliding bearing.

The labels in fig. 2 and 3 are:

1. casing, 2, casing end cover, 3, glib talker, 4, bearing frame, 5, antifriction bearing, 6, axle head protective sheath, 7, bearing frame upper bracket, 8, bearing frame support base, 9, end cover fastening bolt, 10, sealing ring, 11, sprocket, 12, position sleeve, 13, bearing frame seal flange piece, 14, pivot, 15, bearing frame fastening bolt, 16, parallel key, 17, flange fastening bolt, 18, sealing ring seal flange, 19, graphite packing, 20, impeller, 21, unloader feed inlet, 22, unloader discharge gate.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention by those skilled in the art.

The structure of the utility model, as shown in fig. 2 and fig. 3, is a transmission mechanism of a discharging machine, which comprises a casing 1, a casing end cover 2, a rotating shaft 14 and an impeller 20. The unloader is also provided with an unloader feed port 21 and an unloader discharge port 22.

Wherein: the impeller 20 may also be of a drum construction;

the shell end cover 2 is a plane circular steel plate, is fastened on two sides of the shell 1 by bolts, flat pads and elastic pads, and is provided with a hole in the center and encapsulates a steel sealing ring exposing the shell end cover 2;

the machine shell end cover 2 is tightly connected with the machine shell 1 through an end cover fastening bolt 9 and a gasket.

In order to overcome the defects existing in the prior art and realize the invention purpose of prolonging the service life of the bearing, the utility model adopts the technical scheme that:

as shown in fig. 2, in the transmission mechanism of the discharging machine of the present invention, two ends of the rotating shaft 14 extending out of the end cover 2 of the casing are supported by rolling bearings 5 respectively; the outer surface of the central hole of the shell end cover 2 matched with the rotating shaft 14 is provided with a sealing ring 10, and the sealing ring 10 is fastened on the shell end cover 2 through a sealing ring sealing flange 18.

The rotating shaft 14 is a smooth solid cylindrical forge piece, a casting or round steel with the same full length and diameter, and the diameter of the rotating shaft 14 is 90 mm. The bearing seat 4 is arranged outside the casing 1 and sleeved at two ends of the rotating shaft 14. It passes through the sealing rings of the central holes of the end covers 2 of the machine shell at two sides, and the two ends of the rotating shaft 14 pass through the sealing rings and are supported on the bearing block 4 outside the machine shell. The rotating shaft 14 is sleeved with a flange which is fastened with a sealing ring by bolts and a flat gasket, and the flange and the sealing ring are sealed by a packing. The two sides of the bearing seat 4 are sealed by flange sheets sleeved on the rotating shaft 14.

The bearing seat 4 is vertical and round; the rolling bearing 5 is arranged in the bearing seat 4; the bearing seat 4 is fixedly arranged on the bearing seat upper bracket 7. The bearing seat 4 is fixedly arranged on the bearing seat upper bracket 7 through a bearing seat fastening bolt 15 and a gasket.

The two sides of the bearing seat 4 are sealed by a bearing seat sealing flange sheet 13 sleeved on the rotating shaft 14, a fastening bolt and a gasket.

The utility model cancels the prior art that the sliding bearing is embedded in the end cover, and changes the bearing seat 4 and the rolling bearing 5 are arranged outside the shell end cover 2; the bearing block 4 can move horizontally on the assembled bracket and is internally provided with a rolling bearing 5; in operation, the shaft 14 supported in the bearing housing 4 rotates with the associated roller bearing 5, and drives the impeller 20 (or drum) in the housing to rotate synchronously, thereby transferring the material filled between the upper blades to the discharge port 22 of the unloader at the lower portion for uniform and smooth discharge.

A bearing seat 4 with a built-in rolling bearing 5 is arranged outside the casing 1 to support the rotating shaft 14, so that the sealing property and the working condition stability of the machine body are improved; the rolling bearing 5 does not contact materials in the machine, so that the phenomenon that dust enters the bearing from a gap is eliminated; the bearing is replaced without off-line, and the bearing is quickly disassembled and assembled when replaced; the maintenance is convenient and fast, and the operation and maintenance cost is reduced. By adopting the rolling bearing, the rotation flexibility of the rotating shaft and the bearing is improved, the contact wear of the rotating shaft and the bearing is reduced, the rotating shaft 14 and the rolling bearing 5 rotate flexibly, the wear and the faults are reduced, and the service life is prolonged.

The shell end covers 2 are fastened on two sides of the shell 1, the center of the shell is provided with a hole and is packaged with the sealing ring 10, and the sealing ring sealing flange 18 is pressed on the sealing ring 10 by using a flange fastening bolt 17 and a gasket; the sealing ring sealing flange 18 and the sealing ring 10 are sealed by a graphite packing 19, so that the sealing state in the machine is ensured, the fluctuation of wind pressure is avoided, and the environment pollution caused by dust is eliminated.

The bearing seat upper bracket 7 is fixedly arranged on a bearing seat bracket base 8; and the bearing seat support base 8 is fixedly arranged on the shell end cover 2. The bearing seat support base 8 is welded on the shell end cover 2 and movably assembled with the bearing seat upper support 7, the bearing seat 4 is axially translated along with the bearing seat upper support 7 to adjust the installation position, and abrasion caused by long-time contact work of the contact surface of the rotating shaft 14 and the rolling bearing 5 is reduced.

The bottom of the bearing seat 4 is fastened with a supporting plate of the bearing seat upper bracket 7 by bolts and flat pads;

and a chain wheel 11 for connecting a speed reducer is arranged between the bearing seat 4 at one end of the rotating shaft 14 and the sealing ring sealing flange 18, and the chain wheel 11 is fixedly connected with the rotating shaft 14. The chain wheel 11 is fixedly connected with the rotating shaft 14 through a flat key 16. The flat key can adopt A-type flat key.

The chain wheel 11 is arranged on a rotating shaft 14 between one side of the bearing seat 4 and the shell end cover 2 and is connected with the speed reducer through chain transmission. The chain 11 is fast in transmission starting, the loss of rotating power is small, and the chain transmission is fast in starting.

When the automatic unloading machine works, the motor is connected with the speed reducer and is connected with the chain wheel through chain transmission, the rotating shaft 14 and the matched rolling bearing 5 are driven to rotate together, the impeller 20 (or the rotary drum) in the shell of the driving machine is driven to synchronously rotate, and the material falling from the feeding hole 21 of the unloading machine and filled between the upper blades is transferred to the lower discharging hole 22 to be evenly and stably unloaded.

And positioning sleeves 12 are respectively arranged on the rotating shafts 14 between the chain wheel 11 and the bearing seat 4 and between the chain wheel 11 and the shell end cover 2, so that the chain wheel 11 is axially positioned. And a positioning sleeve 12 is axially arranged among the shell end cover 2, the chain wheel 11 and the bearing seat 4 and fixed in a stopping way.

The axial mounting positioning sleeve 12 between the casing end cover 2, the chain wheel 11, the bearing seat 4 and the shaft end protective sleeve 6 is stopped and fixed, so that the axial leap of the chain wheel 11, the bearing seat 4 and the connecting piece of the solid output shaft of the pre-installed speed reducer is prevented.

The shaft end protective sleeve 6 can also adopt a preassembled speed reducer solid output shaft connecting piece.

And a shaft end protective sleeve 6 or a connecting piece connected with an output shaft of the speed reducer is arranged at the end part of the rotating shaft 14, which is opposite to the end part where the chain wheel 11 is arranged.

The shaft end protective sleeve 6 (or the preassembled solid output shaft connecting piece of the speed reducer) is arranged on the outward extending section of the rotating shaft 14 penetrating through the bearing seat 4 on one side, the rotating shaft 14 is directly sleeved with the hollow output shaft of the speed reducer after the shaft end protective sleeve 6 is taken down, or is connected with the solid output shaft of the speed reducer through the preassembled connecting piece, and the shell end cover 2, the bearing seat 4 and the solid output shaft connecting piece of the speed reducer are axially arranged and positioned and fixed through the positioning sleeve.

The rotating shaft 14 is connected with a solid output shaft of another speed reducer through a speed reducer output shaft connecting piece preassembled at the other end, or is directly sleeved with a hollow output shaft of the speed reducer, and the motor is connected with the speed reducer to directly drive the rotating shaft 14 to rotate together with the rolling bearing 5 matched with the speed reducer.

The composite driving mode that one end of the rotating shaft 14 is connected with the speed reducer through the chain wheel 11 and the other end of the rotating shaft is directly connected with the output end of the speed reducer is adopted, and the rotating shaft 14 can be driven by directly connecting another speed reducer when the chain transmission cannot run. Make the unloader have the sprocket and connect the compound drive function of speed reducer and pivot direct-connected reducer, when chain drive or speed reducer break down and stop, can directly suit the hollow output shaft of speed reducer with the one end of pivot not installing the sprocket or with the hollow output shaft of pre-installation connecting piece direct-connected reducer, drive by other speed reducer, reduce the off-time of unloading, improve unloader work efficiency to guarantee the stable direct movement of unloader. The long-time production interruption caused by the failure of the existing speed reducer or chain transmission is avoided.

The sealing material between the sealing ring sealing flange 18 and the sealing ring 10 is a graphite packing 19.

The exposed steel sealing ring 10 is packaged in the center hole of the end cover 2 of the machine shell, the sleeving flange is fastened with the sealing ring and sealed by the graphite disk root 19, the sealing performance of the star-shaped unloader is improved, the fluctuation of wind pressure in the unloader is avoided, the stable production process is ensured, and the environmental pollution caused by the overflow of dust in the unloader is avoided.

The bearing seat support is of an upper movable assembled steel structure and a lower movable assembled steel structure.

The bearing seat upper bracket 7 adopts an I-shaped steel structure; the bearing seat support base 8 adopts a channel steel structure or an angle steel structure; the bearing seat upper bracket 7 is connected with the bearing seat bracket base 8 through bolts, and bolt holes for connection are arranged. The bottom of the bearing seat 4 is fixedly connected with a bearing seat upper bracket 7 supporting plate.

The bearing seat support base 8 is concave and is welded or riveted on the shell end cover 2; the bearing seat upper bracket 7 is I-shaped and is connected with the lower part by bolts, the upper part of the bearing seat upper bracket is used as a bearing seat 4 mounting supporting plate, and the lower part of the bearing seat upper bracket can be horizontally adjusted on the lower connecting surface to be assembled.

Specifically, channel steel or angle steel is adopted on two sides of a concave steel structure of the bearing seat support base 8, a plurality of holes are formed in symmetrical positions, and the concave steel structure and the convex steel structure are flexibly assembled with the bottom of an I-shaped steel structure on the upper portion.

The position can be assembled in "worker" font steel construction bottom of bearing frame upper bracket 7 at "concave" font steel construction surface horizontal migration, the nimble adjustment of bearing frame support base 8, is favorable to adjusting the bearing frame mounted position as required, avoids pivot and antifriction bearing to work at same contact surface for a long time and aggravate the wearing and tearing. The horizontal adjustment is convenient during the assembly of the bracket, the mounting position of the bearing seat can be adjusted according to the requirement, and the rotary abrasion caused by the long-term fixation of the contact surface of the inner ring of the bearing and the rotating shaft is reduced; the end cover can be conveniently, quickly and conveniently detached and installed so as to overhaul or replace other parts in the machine shell.

Two sides of a concave steel structure of the bearing seat support base 8 adopt 80 multiplied by 50 multiplied by 5mm angle steels and are provided with 3 groups of symmetrical holes with the diameter of 10mm, the distance between the symmetrical holes and an I-shaped steel structure supporting plate of the upper support 7 of the upper bearing seat is 238mm, the bottom of the upper support is regularly adjusted and assembled with the angle steels at different vacancy positions, and the position of the bearing seat moves along with the movement, so that the contact wear of a rotating shaft and a rolling bearing is reduced.

The top end of the bearing seat 4 is provided with an oil nozzle 3. The rolling bearing 5 is lubricated by grease injected into the oil nozzle 3 above the bearing seat 4.

The rolling bearing 5 adopts a cylindrical roller bearing, and the nominal width of the cylindrical roller bearing is 64 mm.

To sum up, the utility model discloses simple structure, stability is good, reasonable in design, easily makes, is convenient for maintain and maintain. Through the utility model discloses an actual application verifies: the original condition that a sliding bearing is embedded in the end cover of the casing is cancelled, and after a bearing seat is arranged outside the end cover of the casing and a rolling bearing is arranged in the bearing seat, the bearing seat is tried by tracking for more than 8 months, and no replacement record exists so far. The rolling bearing is arranged in the bearing seat, the operation is stable, the inner ring of the bearing and the rotating shaft are not obviously abraded, the repair cost of leaving factory is greatly saved, the air supply of combustion-supporting air in the kiln is stable, a foundation is laid for the quality of lime to reach the standard, the phenomenon of air leakage and ash spraying is avoided, and the field environment is controlled; the factory repair cost is reduced by about 3.8 ten thousand yuan/year, the shutdown and kiln halt time is reduced by about 1440 minutes due to the influence of the star-shaped ash hoist faults, the problem that the lime quality is influenced by unstable air pressure in lime production is avoided, and the field environment is controlled.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.

Claims (9)

1. The utility model provides an unloader drive mechanism, the unloader include casing (1), casing end cover (2), pivot (14), impeller (20), its characterized in that: two ends of the rotating shaft (14) extending out of the shell end cover (2) are supported by rolling bearings (5) respectively; the outer surface of the center hole matched with the rotating shaft (14) of the shell end cover (2) is provided with a sealing ring (10), and the sealing ring (10) is fastened on the shell end cover (2) through a sealing ring sealing flange (18).

2. The unloader drive mechanism according to claim 1, wherein: the rolling bearing (5) is arranged in the bearing seat (4); the bearing seat (4) is fixedly arranged on a bearing seat upper bracket (7), and the bearing seat upper bracket (7) is fixedly arranged on a bearing seat bracket base (8); and the bearing seat support base (8) is fixedly arranged on the shell end cover (2).

3. The unloader drive mechanism according to claim 2, wherein: a chain wheel (11) used for being connected with a speed reducer is arranged between a bearing seat (4) at one end of the rotating shaft (14) and a sealing ring sealing flange (18), and the chain wheel (11) is fixedly connected with the rotating shaft (14).

4. The unloader drive mechanism according to claim 3, wherein: and positioning sleeves (12) are respectively arranged on the rotating shaft (14) between the chain wheel (11) and the bearing seat (4) and between the chain wheel (11) and the shell end cover (2), so that the axial positioning of the chain wheel (11) is realized.

5. The unloader drive mechanism according to claim 3, wherein: and a shaft end protective sleeve (6) is arranged at the end part of one end of the rotating shaft (14) opposite to the end part where the chain wheel (11) is installed, or a connecting piece connected with an output shaft of the speed reducer is arranged.

6. The unloader drive mechanism according to claim 3, wherein: the sealing material between the sealing ring sealing flange (18) and the sealing ring (10) is a graphite packing (19).

7. The unloader drive mechanism according to claim 2, wherein: the upper bracket (7) of the bearing seat adopts an I-shaped steel structure; the bearing seat support base (8) adopts a channel steel structure or an angle steel structure; the bearing seat upper bracket (7) is connected with the bearing seat bracket base (8) by bolts.

8. The unloader drive mechanism according to claim 2, wherein: and the top end of the bearing seat (4) is provided with an oil nozzle (3).

9. The unloader drive mechanism according to claim 2, wherein: the rolling bearing (5) adopts a cylindrical roller bearing, and the nominal width of the cylindrical roller bearing is 64 mm.

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