CN110538590A

CN110538590A - Stirring mechanism of vertical stirrer

Info

Publication number: CN110538590A
Application number: CN201910931975.9A
Authority: CN
Inventors: 王松; 夏鹏华; 叶坤; 耿职; 孙建国; 梁超帝; 许金明; 赵意
Original assignee: Bengbu Triumph Engineering and Technology Co Ltd
Current assignee: Bengbu Triumph Engineering and Technology Co Ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2019-12-06
Anticipated expiration: 2039-09-29
Also published as: CN110538590B

Abstract

The invention discloses a stirring mechanism of a vertical stirrer, which relates to the field of vertical stirring and comprises a main shaft, a stirring rake connecting mechanism, a rotary joint connecting mechanism, a transmission device mounting mechanism, a rotary joint and a transmission device, wherein the main shaft is connected with the stirring rake connecting mechanism; the axis of the main shaft is in the vertical direction, and the main shaft is connected in a bearing with the axis arranged in the vertical direction; the stirring rake connecting mechanism is fixedly connected to the lower end of the main shaft; the rotary joint connecting mechanism is fixedly connected to the upper end of the main shaft, and the rotary joint is connected with the main shaft through the rotary joint connecting mechanism; the transmission device mounting mechanism is arranged in the middle of the main shaft, the output end of the transmission device is connected with the main shaft through the transmission device mounting mechanism, and the input end of the transmission device is connected with the driving device. The invention has the advantages that: the height of the vertical stirrer transmission station can be reduced, and the rotary joint can be conveniently and quickly replaced.

Description

Stirring mechanism of vertical stirrer

Technical Field

The invention relates to the field of vertical stirring, in particular to a stirring mechanism of a vertical stirrer.

Background

In a float glass production line, a molten glass stirrer is one of special devices for producing flat glass. The glass melt stirrer is installed at the neck of the melting furnace, stirs the glass melt, is used for improving the uniformity of glass melting, and is special equipment for forcibly homogenizing the glass melt. The molten glass stirrer eliminates or reduces the defect that natural homogenization cannot overcome through mechanical stirring of the stirring blades, and ensures the thermal uniformity and chemical uniformity of molten glass entering a forming area, thereby improving the optical performance and surface quality of a glass finished product. The stirring mode of the glass liquid stirrer is divided into horizontal stirring and vertical stirring, and along with the improvement of the product quality requirement, the vertical stirrer is more and more widely adopted, and particularly the vertical stirrer is preferred in high-end production lines of information display glass, automobile glass and the like.

the vertical stirrer is provided with a rotary joint in the stirring mechanism due to the characteristic of vertical rotation. Patent document No. CN201883016U discloses an improved vertical stirrer for high-temperature molten glass, in the specification of the patent document, a motor and a speed reducer are mounted on the top of a cage-shaped support, a stirring rod is driven to rotate through a claw clutch, and with reference to the attached drawing 1 of the specification, a floating rotary joint is mounted in the middle of the stirring rod, and cooling water flows through the stirring blades through the floating rotary joint and then flows out of the floating rotary joint. A driving device of a stirring mechanism of the conventional vertical stirrer is arranged at the tail part of a main shaft in a rear mode, and a rotary joint is arranged in the middle of the main shaft in a middle mode. The stirring mechanism of the existing vertical stirrer has the following defects: the rear-mounted driving device needs to support the transmission station at a very high position and needs an extra steel structure platform for supporting, so that the cost is high; the rotary joint belongs to a quick-wear part and needs to be replaced frequently, and when the central rotary joint is replaced, the whole stirring mechanism needs to be disassembled completely, so that the replacement time is long, and the production is not facilitated; when the central rotary joint is adopted, water inlet and outlet holes are required to be formed in the side wall of the main shaft, which is positioned at the rotary joint, and the water is communicated to the main shaft by the rotary joint; the large-area dynamic sealing surface of the central rotary joint has extremely high requirement on water quality, and rust impurities in water easily cause damage to the rotary joint, so that the defects of high failure rate, easy water leakage and the like are caused, and the maintenance is not facilitated.

disclosure of Invention

The invention aims to provide a stirring mechanism of a vertical stirrer, which can reduce the height of a vertical stirrer transmission station and can conveniently and quickly replace a rotary joint.

The invention solves the technical problems through the following technical means: the stirring mechanism of the vertical stirrer comprises a main shaft (1), a stirring rake connecting mechanism (2), a rotary joint connecting mechanism (3), a transmission device mounting mechanism (4), a rotary joint (6) and a transmission device (7); the axis of the main shaft (1) is in the vertical direction, and the main shaft (1) is connected in a bearing with the axis arranged in the vertical direction; the stirring rake connecting mechanism (2) is fixedly connected to the lower end of the main shaft (1); the rotary joint connecting mechanism (3) is fixedly connected to the upper end of the main shaft (1), and the rotary joint (6) is connected with the main shaft (1) through the rotary joint connecting mechanism (3); transmission installation mechanism (4) are established the middle part of main shaft (1), the output of transmission (7) passes through transmission installation mechanism (4) are connected main shaft (1), drive arrangement is connected to the input of transmission (7). The transmission device is connected with the middle part of the main shaft through the transmission device mounting mechanism, and the driving device drives the main shaft through the transmission device, so that the height of the driving device can be reduced, and the height of the vertical stirrer transmission station is reduced; the rotary joint is connected with the tail part of the main shaft through the rotary joint connecting mechanism, the stirring mechanism of the vertical stirrer is not required to be disassembled when the rotary joint is replaced, and the rotary joint can be conveniently and quickly replaced.

As an optimized technical scheme, the main shaft (1) comprises an outer pipe (11), an inner pipe (12), a water return channel (13), a water inlet channel (14) and a fixed block (15); the axis of the outer pipe (11) is along the vertical direction, an outer pipe cavity penetrating from the upper end to the lower end of the outer pipe (11) is formed in the outer pipe (11), and the outer pipe cavity and the outer pipe (11) are coaxially arranged; the inner pipe (12) is fixedly connected in the outer pipe cavity and is coaxially arranged with the outer pipe (11); a gap formed between the outer side surface of the inner pipe (12) and the inner side surface of the outer pipe (11) is a water return channel (13); the inner pipe (12) is provided with a water inlet channel (14) which penetrates from the upper end to the lower end of the inner pipe, and the water inlet channel (14) and the inner pipe (12) are coaxially arranged; the inner pipe (12) and the outer pipe (11) are fixedly connected through the fixing blocks (15), one ends of the fixing blocks (15) are fixedly connected to the outer side face of the inner pipe (12), and the other ends of the fixing blocks are fixedly connected to the inner side face of the outer pipe (11).

As an optimized technical scheme, the stirring rake connecting mechanism (2) comprises a main shaft lower end flange (21), a water inlet hole (22), a water return hole (23), a first sealing groove (24) and a second sealing groove (25); the main shaft lower end flange (21) is coaxially arranged with the main shaft (1), and the main shaft lower end flange (21) is fixedly connected to the lower end of the main shaft (1); the center of the lower end flange (21) of the main shaft is provided with a water inlet hole (22) penetrating from the top surface to the bottom surface of the main shaft, and the water inlet hole (22) and the water inlet channel (14) are coaxially arranged and are communicated with the water inlet channel (14); the flange (21) at the lower end of the main shaft is also provided with a plurality of water return holes (23) penetrating from the top surface to the bottom surface of the flange, each water return hole (23) is positioned on the outer ring of the water inlet hole (21) and the inner ring of the water return channel (13), each water return hole (23) is uniformly distributed on the outer ring of the water inlet hole (22), and the axis of each water return hole (23) is vertically communicated with the water return channel (13); a first sealing groove (24) and a second sealing groove (25) are formed in the bottom surface of the main shaft lower end flange (21); the first sealing groove (24) is positioned on the outer ring of the water inlet hole (22) and the inner ring of the water return hole (23), and the second sealing groove (25) is positioned on the outer ring of the water return hole (23); the first sealing groove (24) and the second sealing groove (25) are both annular, and a first sealing ring and a second sealing ring are respectively arranged in the first sealing groove (24) and the second sealing groove (25).

As an optimized technical scheme, the rotary joint connecting mechanism (3) comprises a stop block (31) and a loop flange (32); an annular stop block mounting groove is formed in the outer ring of the upper end of the outer pipe (11), the stop block (31) comprises two Harvard blocks which are fixedly connected to two sides in the stop block mounting groove respectively, and the outer side surface of the stop block (31) is an inclined surface which is gradually folded inwards from top to bottom; a stop block mounting hole penetrating from the top surface to the bottom surface of the loop flange (32) is formed in the loop flange, and the inner side surface of the stop block mounting hole is an inclined surface matched with the outer side surface of the stop block (31); the movable sleeve flange (32) is sleeved on the outer ring of the stop block (31), the inner side face of the stop block mounting hole is attached to the outer side face of the stop block (31), and the stop block (31) and the movable sleeve flange (32) are spliced into a flange structure which is coaxial with the main shaft (1).

As an optimized technical scheme, the rotary joint (6) comprises a rotary part (61), a fixed part (62), a rotary joint flange (63), a sealing washer (64), a water return cavity (65), a water return port (66), a water inlet (67) and a rotary joint sealing washer (68); the rotating part (61) is arranged below the fixed part (62), and the rotating part (61) is rotatably connected with the fixed part (62); the rotary joint flange (63) is fixedly connected to the lower end of the rotary part (61), the rotary joint flange (63) is fixedly connected with the loop flange (32), and a sealing gasket (64) is arranged between the bottom of the rotary joint flange (63) and the upper end of the outer pipe (11); the rotary joint flange (63) is fixedly connected with the loop flange (32), and a sealing gasket is arranged between the bottom of the rotary joint flange (63) and the upper end of the outer pipe (11); the inner cavity of the rotating part (61) is communicated with the inner cavity of the fixing part (62) to form the water return cavity (65), and the central hole of the rotating joint flange (63) is communicated with the water return cavity (65); the upper part of the inner pipe (12) extends into the water return cavity (65) from the central hole of the rotary joint flange (63) and can rotate in the water return cavity (65); the upper part of the inner pipe (12) extends into the water return cavity (65) from the central hole of the rotary joint flange (63), and the inner pipe (12) can rotate in the water return cavity (65); an opening at the upper end of the water return channel (13) is communicated with the water return cavity (65) through a gap between the outer side surface of the inner pipe (12) and the inner side surface of the central hole of the rotary joint flange (63); the water return port (66) is fixedly connected to one side of the fixing part (62), and the water return port (66) is communicated with the water return channel (13) through the water return cavity (65); the water inlet (67) is fixedly connected to the upper part of the fixing part (62), and the water inlet (67) is communicated with an upper end opening of the water inlet channel (14); a plurality of rotary joint sealing rings (68) are arranged at the upper part of the water return cavity (65) at intervals up and down, each rotary joint sealing ring (68) is sleeved on the outer ring of the upper end of the inner pipe (12), and the rotary joint sealing rings (68) are sealed between the water inlet (67) and the water return cavity (65).

as an optimized technical scheme, the stirring mechanism of the vertical stirrer further comprises a support (5), wherein the support (5) comprises a bottom plate (51), a top plate (52), a supporting structure (53), a lower bearing seat (54), an upper bearing seat (55) and a main shaft bearing (56); the bottom plate (51) is horizontally arranged, the top plate (52) is horizontally arranged below the bottom plate (51), through holes with axes along the vertical direction are formed in the centers of the bottom plate (51) and the top plate (52), and the through holes in the bottom plate (51) and the through holes in the top plate (52) are coaxially arranged; the supporting structure (53) is fixedly connected between the bottom plate (51) and the top plate (52); the lower bearing seat (54) is arranged below the bottom plate (51) and is fixedly connected with the bottom plate (51); the upper bearing seat (55) is arranged above the top plate (52) and is fixedly connected with the top plate (52); main shaft bearings (56) are respectively arranged in inner cavities of the lower bearing seat (54) and the upper bearing seat (55), and each main shaft bearing (56) is coaxially arranged with a through hole in the bottom plate (51) and a through hole in the top plate (52); the main shaft (1) sequentially penetrates through the lower bearing seat (54), the through hole in the bottom plate (51), the through hole in the top plate (52) and the upper bearing seat (55) and is connected to bearing holes of the main shaft bearings (56), the stirring rake connecting mechanism (2) is located below the lower bearing seat (54), and the rotary joint connecting mechanism (3) is located above the upper bearing seat (55).

As an optimized technical scheme, the main shaft (1) comprises an outer pipe (11), and the axis of the outer pipe (11) is in the vertical direction; the outer tube (11) comprises a first step part (111), a second step part (112) and a third step part (113), the first step part (111), the second step part (112) and the third step part (113) are fixedly connected from bottom to top in sequence, the first step part (111), the second step part (112) and the third step part (113) are vertically arranged cylinders, the diameters of the first step part (111), the second step part (112) and the third step part (113) are reduced in sequence, and the first step part (111), the second step part (112) and the third step part (113) are coaxially arranged; the part of the upper end of the first step part (111) protruding out of the outer ring of the second step part (112) is clamped on the lower end opening outer ring of the lower bearing seat (54); the part of the upper end of the second step part (112) protruding out of the outer ring of the third step part (113) is clamped at the lower end of the transmission device (7).

As an optimized technical scheme, the transmission device (7) comprises an input mechanism (76) and an output mechanism (77); the input mechanism (76) comprises an input shaft (763), the axis of the input shaft (763) is in the horizontal direction, and the input shaft (763) is connected in a bearing with the axis arranged in the horizontal direction; the output mechanism (77) comprises an output shaft (773) and a spindle mounting hole (774); the axis of the output shaft (773) is in the vertical direction, and the output shaft (773) is connected in a bearing with the axis arranged in the vertical direction; a spindle mounting hole (774) penetrating from the upper end to the lower end of the output shaft (773) is formed in the output shaft (773), and the spindle mounting hole (774) and the output shaft (773) are coaxially arranged; a steering mechanism is arranged between the input shaft (763) and the output shaft (773), and the steering mechanism can convert the rotation of a horizontal shaft into the rotation of a vertical shaft.

As an optimized technical scheme, the input mechanism (76) further comprises an input shaft key slot (764) and an input shaft flange (765); an input shaft key slot (764) is formed in one end of the input shaft (763); the input shaft flange (765) comprises a connecting sleeve, a flange plate, a shaft head mounting cavity and a connecting sleeve key groove; the connecting sleeve and the flange plate are coaxially arranged, and one end of the connecting sleeve is fixedly connected to one end of the flange plate; the other end of the connecting sleeve is provided with a shaft head mounting cavity which is coaxial with the connecting sleeve; the inner side surface of the shaft head mounting cavity is provided with a connecting sleeve key groove; the connecting sleeve is sleeved on the outer ring of the input shaft head through the shaft head mounting cavity, two sides of an input shaft connecting key are respectively mounted in the input shaft key groove (764) and the connecting sleeve key groove, and the input shaft (763) is connected with the input shaft flange (765) in a key mode;

Output shaft keyway (775) have been seted up to the medial surface of main shaft mounting hole (774), transmission installation mechanism (4) do the keyway that the lateral surface of main shaft (1) was seted up, output shaft (773) pass through main shaft mounting hole (774) cover is in the outer lane of main shaft (1), the both sides of main shaft connecting key are installed respectively transmission installation mechanism (4) with in output shaft keyway (775), will main shaft (1) with output shaft (773) key-type connection.

As an optimized technical scheme, the transmission device (7) further comprises a box body (71), a first end cover (72), a second end cover (73), a third end cover (74), a fourth end cover (75), a driving gear (78) and a driven gear (79);

The box body (71) is a hollow cuboid; two opposite vertical side plates of the box body (71) are respectively provided with an input shaft mounting hole, and the two input shaft mounting holes are oppositely arranged; the first end cover (72) and the second end cover (73) are respectively covered on the outer sides of the two input shaft mounting holes, and an input shaft through hole is formed in the center of the first end cover (72); output shaft mounting holes are respectively formed in the top horizontal plate and the bottom horizontal plate of the box body (71), and the two output shaft mounting holes are oppositely arranged; the third end cover (74) covers the outer side of the output shaft mounting hole in the top horizontal plate, the fourth end cover (75) covers the outer side of the output shaft mounting hole in the bottom horizontal plate, and output shaft through holes are formed in the centers of the third end cover (74) and the fourth end cover (75) respectively;

The input mechanism (76) further comprises a first bearing (761), a second bearing (762), an input shaft sealing ring (766) and a retaining ring (767); the axes of the first bearing (761) and the second bearing (762) are arranged along the horizontal direction and are respectively and fixedly connected in the two input shaft mounting holes, and the first bearing (761) and the second bearing (762) are respectively positioned at the inner sides of the first end cover (72) and the second end cover (73); the input shaft (763) comprises an input shaft main body, an input shaft head and an input shaft retainer ring, the input shaft head is fixedly connected to one end of the input shaft main body, the input shaft retainer ring is fixedly connected to the outer ring of the input shaft main body, and the input shaft main body, the input shaft head and the input shaft retainer ring are coaxially arranged; the two ends of the input shaft main body are respectively connected into bearing holes of the first bearing (761) and the second bearing (762), one end of the input shaft main body, which is connected with the input shaft head, extends out of the box body (71) from the input shaft through hole, the other end of the input shaft main body is positioned on the inner side of the second end cover (73), and the input shaft retainer ring is positioned in an inner cavity of the box body (71); the input shaft key groove (764) is formed in the side wall of the input shaft head; the input shaft sealing ring (766) is arranged between the first bearing (761) and the first end cover (72) and sleeved on the outer ring of the input shaft main body; the retainer ring (767) is arranged in an inner cavity of the box body (71) and sleeved on an outer ring of the input shaft main body;

The output mechanism (77) further comprises a third bearing (771), a fourth bearing (772) and an output shaft sealing ring (776); the axes of the two third bearings (771) are arranged along the vertical direction and are respectively and fixedly connected in the two output shaft mounting holes, and the two third bearings (771) are respectively positioned on the inner sides of the third end cover (74) and the fourth end cover (75); the output shaft (773) comprises an output shaft main body and bearing connecting ends, and the two bearing connecting ends are respectively and fixedly connected to two ends of the output shaft main body and are coaxially arranged with the output shaft main body; two bearing connection ends are respectively connected in bearing holes of the third bearing (771) and the fourth bearing (772), the two bearing connection ends respectively extend out of the box body (71) from two output shaft through holes, and the output shaft main body is positioned in an inner cavity of the box body (71); two output shaft sealing rings (776) are respectively arranged between the third bearing (771) and the third end cover (74) and between the fourth bearing (772) and the fourth end cover (75), and the two output shaft sealing rings (776) are respectively sleeved on the outer rings of the connecting ends of the two bearings;

The steering mechanism comprises a driving gear (78) and a driven gear (79), and the driving gear (78) and the driven gear (79) both adopt helical gears; the driving gear (78) is fixedly connected to the outer ring of the input shaft main body, the input shaft retainer ring is positioned between the driving gear (78) and the first bearing (761), and the retainer ring (767) is positioned between the driving gear (78) and the second bearing (762); the driven gear (79) is fixedly connected to the outer ring of the output shaft main body, and the driving gear (78) and the driven gear (79) are in matched transmission.

The invention has the advantages that:

1. The transmission device is connected with the middle part of the main shaft through the transmission device mounting mechanism, the driving device drives the main shaft through the transmission device, and the height of the driving device can be reduced, so that the height of the vertical stirrer transmission station is reduced, and the investment cost of enterprises is reduced.

2. The rotary joint passes through the afterbody that rotary joint coupling mechanism connected the main shaft, need not to disassemble the rabbling mechanism of perpendicular agitator when changing rotary joint, can conveniently, change rotary joint fast, be favorable to the enterprise production.

3. due to the structural characteristics of the rear-mounted rotary joint, the diameter of the rotary joint is reduced, the dynamic sealing area is reduced, the processing difficulty is reduced, the cost is reduced, and the production period is shortened.

4. The rear rotary joint reduces the dynamic sealing area due to the structural characteristics, has general requirements on water quality, improves the defects of high failure rate, easy water leakage and the like, and is beneficial to the maintenance of enterprises.

drawings

FIG. 1 is a schematic view of a vertical mixer according to an embodiment of the present invention in an installed and used state.

FIG. 2 is a schematic structural diagram of a stirring mechanism of a vertical stirrer according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a spindle and rotary joint connection according to an embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a spindle according to an embodiment of the present invention.

FIG. 5 is a schematic top view of a spindle according to an embodiment of the present invention.

FIG. 6 is an enlarged view of the position A in the schematic cross-sectional view of the spindle and rotary joint connection according to the embodiment of the present invention.

FIG. 7 is a schematic bottom view of a rabble connecting mechanism according to an embodiment of the invention.

Fig. 8 is an enlarged view of the position B on the schematic sectional view of the spindle and the rotary joint according to the embodiment of the present invention.

FIG. 9 is a partial schematic half-section view of a stent according to an embodiment of the present invention.

FIG. 10 is an isometric view of the bottom plate, top plate and support structure of the stand according to an embodiment of the invention.

FIG. 11 is a partial schematic half-section view of a rotary union according to an embodiment of the present invention.

FIG. 12 is a schematic front view of a transmission according to an embodiment of the present invention.

FIG. 13 is a schematic top view of a transmission according to an embodiment of the present invention.

FIG. 14 is a schematic partial half-section in front elevation of a transmission embodying the present invention.

FIG. 15 is a schematic view of the input shaft of the transmission according to an embodiment of the present invention.

FIG. 16 is a schematic, partially cross-sectional, top view of a transmission in accordance with an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 16, the stirring mechanism of the vertical stirrer comprises a main shaft 1, a stirring rake connecting mechanism 2, a rotary joint connecting mechanism 3, a transmission device mounting mechanism 4, a bracket 5, a rotary joint 6 and a transmission device 7.

As shown in fig. 1 to 4, the axis of the main shaft 1 is in the vertical direction; the support 5 is fixedly connected to a supporting platform 8 above the molten glass stirring container, a bearing with an axis arranged along the vertical direction is arranged in the support 5, and the middle part of the main shaft 1 is connected to the bearing in the support 5; the rabble connecting mechanism 2 is fixedly connected to the lower end of the main shaft 1, the rabble connecting mechanism 2 is positioned below the bracket 5, an upper end flange of the rabble 9 is fixedly connected with the rabble connecting mechanism 2 through a bolt, and the rabble 9 is used for stirring glass liquid; the rotary joint connecting mechanism 3 is fixedly connected to the upper end of the main shaft 1, the rotary joint connecting mechanism 3 is positioned above the bracket 5, the rotary joint 6 is connected with the main shaft 1 through the rotary joint connecting mechanism 3, and the rotary joint 6 is used for connecting a water inlet pipeline and a water outlet pipeline of cooling water; the transmission device mounting mechanism 4 is arranged in the middle of the main shaft 1, the rotary transmission device 7 is arranged in the bracket 5, the output end of the transmission device 7 is connected with the main shaft 1 through the transmission device mounting mechanism 4, and the input end of the transmission device 7 is connected with a driving device (not shown in the figure); the driving device adopts a motor, an output shaft of the motor is horizontally arranged, an input end of a transmission device 7 is fixedly connected with the output shaft of the motor, and the output shaft of the motor drives the main shaft 1 through the transmission device 7.

as shown in fig. 3 to 5, the main shaft 1 includes an outer pipe 11, an inner pipe 12, a water return passage 13, a water inlet passage 14, and a fixing block 15.

The axis of the outer tube 11 is in the vertical direction; the outer tube 11 comprises a first step part 111, a second step part 112 and a third step part 113, the first step part 111, the second step part 112 and the third step part 113 are fixedly connected in sequence from bottom to top, the first step part 111, the second step part 112 and the third step part 113 are vertically arranged cylinders, the diameters of the cylinders are sequentially reduced, the first step part 111, the second step part 112 and the third step part 113 are coaxially arranged, the first step part 111, the second step part 112 and the third step part 113 are of an integral structure, and the first step part 111, the second step part 112 and the third step part 113 are used for positioning and installing the main shaft 1; the outer tube 11 is provided with an outer tube cavity which penetrates from the upper end of the first step portion 111 to the lower end of the third step portion 113, and the outer tube cavity is cylindrical and is coaxial with the outer tube 11.

Inner tube 12 is the cylinder, and inner tube 12 fixed connection is in the outer tube cavity and with the outer tube 11 coaxial setting, the upper end of inner tube 12 is followed the upper end opening of outer tube cavity stretches out the top of outer tube 11, the lower extreme of inner tube 12 and the lower extreme parallel and level of outer tube 11.

A circular cylinder gap formed between the outer side surface of the inner pipe 12 and the inner side surface of the outer pipe 11 is a water return channel 13; the inner tube 12 is provided with a water inlet passage 14 which penetrates from the upper end to the lower end of the inner tube, and the water inlet passage 14 is a cylinder and is arranged coaxially with the inner tube 12.

The inner tube 12 and the outer tube 11 are fixedly connected through fixing blocks 15, the fixing blocks 15 are arranged at an opening at the upper end of the outer tube 11, the four strip-shaped fixing blocks 15 are arranged at equal intervals along the circumference of the outer ring of the inner tube 12, one end of each fixing block 15 is welded on the outer side surface of the inner tube 12, and the other end of each fixing block is welded on the inner side surface of the outer tube 11.

As shown in fig. 6 and 7, the rabble connecting mechanism 2 includes a main shaft lower end flange 21, a water inlet hole 22, a water return hole 23, a first sealing groove 24, and a second sealing groove 25.

The main shaft lower end flange 21 is a cylinder and is arranged coaxially with the main shaft 1, and the main shaft lower end flange 21 is welded at the lower end of the main shaft 1.

The center of the flange 21 at the lower end of the main shaft is provided with a water inlet hole 22 penetrating from the top surface to the bottom surface of the flange, the water inlet hole 22 is a cylinder, is coaxially arranged with the water inlet channel 14 and is communicated with the water inlet channel 14, and the water inlet hole 22 is communicated between the water inlet channel 14 and the inlet of the cooling water circulation channel communicated with the stirring rake 9 and is separated from the water return channel 13.

The flange 21 at the lower end of the main shaft is also provided with four water return holes 23 penetrating from the top surface to the bottom surface of the flange, each water return hole 23 is positioned on the outer ring of the water inlet hole 22 and the inner ring of the water return channel 13, each water return hole 23 is uniformly distributed on the outer ring of the water inlet hole 22, the cross section of each water return hole 23 is an arc-shaped strip bent along the circumferential direction of the outer ring of the water inlet hole 22, the axis of each water return hole 23 is communicated with the water return channel 13 along the vertical direction, and each water return hole 23 is communicated between the water return channel 13 and the outlet of the cooling water circulation channel communicated with the stirring rake 9 and separated from the water inlet.

A first sealing groove 24 and a second sealing groove 25 are formed in the bottom surface of the main shaft lower end flange 21; the first sealing groove 24 is positioned on the outer ring of the water inlet hole 22 and the inner ring of the water return hole 23, and the second sealing groove 25 is positioned on the outer ring of the water return hole 23; the first sealing groove 24 and the second sealing groove 25 are both circular rings and are coaxially arranged with the water inlet hole 22, a first sealing ring and a second sealing ring are respectively arranged in the first sealing groove 24 and the second sealing groove 25, the first sealing ring and the second sealing ring are both O-shaped sealing rings, the first sealing ring is sealed between the water inlet hole 22 and the cooling water circulation channel outlet of the stirring rake 9, and the second sealing ring is sealed between the water inlet hole 22 and the cooling water circulation channel inlet of the stirring rake 9.

As shown in fig. 8, the rotary joint connecting mechanism 3 includes a stopper 31 and a loop flange 32.

The annular dog mounting groove of circle is seted up to the upper end outer lane of outer tube 11, and dog 31 includes two arc haversian blocks, and two haversian blocks fixed connection respectively are in both sides in the dog mounting groove, and dog 31's lateral surface is the inclined plane that inwards draws in gradually from the top down.

The loop flange 32 is a cylinder, a stop mounting hole penetrating from the top surface to the bottom surface of the loop flange 32 is formed in the loop flange 32, the stop mounting hole and the loop flange 32 are coaxially arranged, and the inner side surface of the stop mounting hole is an inclined surface matched with the outer side surface of the stop 31.

The loop flange 32 is sleeved on the outer ring of the stop block 31, the inner side surface of the stop block mounting hole is attached to the outer side surface of the stop block 31, and the stop block 31 and the loop flange 32 are spliced to form a flange structure which is coaxial with the main shaft 1.

As shown in fig. 3 and 4, the transmission mounting mechanism 4 is a key groove formed in the lower outer surface of the third stepped portion 113.

As shown in fig. 9 and 10, the bracket 5 includes a bottom plate 51, a top plate 52, a support structure 53, a lower bearing block 54, an upper bearing block 55, and a main shaft bearing 56.

The bottom plate 51 is the circular slab of horizontal setting, and the roof 52 is the circular slab that the diameter is less than bottom plate 51 diameter, and the roof 52 level sets up in the top of bottom plate 51, and the circular through-hole of axis along vertical direction has all been seted up at the center of bottom plate 51 and roof, and the through-hole diameter on the bottom plate 51 is the same and coaxial setting with the through-hole diameter on the roof 52.

The supporting structure 53 is fixedly connected between the bottom plate 51 and the top plate 52, the supporting structure 53 comprises four supporting columns, each supporting column is arranged along the edges of the bottom plate 51 and the top plate 52 at equal intervals, the lower end of each supporting column is welded on the top surface of the bottom plate 51, and the upper end of each supporting column is welded on the bottom surface of the top plate 52.

The lower bearing seat 54 is arranged below the bottom plate 51 and fixedly connected with the bottom plate 51 through bolts, the upper bearing seat 55 is arranged above the top plate 52 and fixedly connected with the top plate 52 through bolts, the inner cavities of the lower bearing seat 54 and the upper bearing seat 55 are respectively provided with a main shaft bearing 56, and each main shaft bearing 56 is coaxially arranged with a through hole on the bottom plate 51 and a through hole on the top plate 52.

The main shaft 1 sequentially passes through the lower bearing seat 54, the through hole on the bottom plate 51, the through hole on the top plate 52 and the upper bearing seat 55 and is connected in the bearing hole of each main shaft bearing 56, the rabble connecting mechanism 2 is positioned below the lower bearing seat 54, and the rotary joint connecting mechanism 3 is positioned above the upper bearing seat 55.

The part of the upper end of the first step part 111 protruding the outer ring of the second step part 112 is clamped on the lower opening outer ring of the lower bearing seat 54, the part of the upper end of the second step part 112 protruding the outer ring of the third step part 113 is clamped on the lower end of the transmission device 7, and the transmission device 7 is located between the bottom plate 51 and the top plate 52.

As shown in fig. 3, 8, and 11, the rotary joint 6 includes a rotary part 61, a fixed part 62, a rotary joint flange 63, a seal gasket 64, a water return cavity 65, a water return port 66, a water inlet 67, and a rotary joint seal ring 68.

The rotating part 61 is arranged below the fixed part 62, and the upper part of the rotating part 61 is rotatably connected with the inside of the fixed part 62 through a bearing; the rotary joint flange 63 is fixedly connected to the lower end of the rotary part 61, the rotary joint flange 63 is fixedly connected with the loop flange 32 through bolts, and a sealing gasket 64 is arranged between the bottom of the rotary joint flange 63 and the upper end of the outer pipe 11; when the main shaft 1 rotates, the rotating portion 61 rotates together with the main shaft 1, and the fixing portion 62 is fixed.

The inner cavity of the rotating part 61 is communicated with the inner cavity of the fixing part 62 to form a water return cavity 65, and the central hole of the rotary joint flange 63 is communicated with the water return cavity 65; the upper part of the inner pipe 12 extends into the backwater cavity 65 from the central hole of the rotary joint flange 63 and can rotate in the backwater cavity 65, and when the main shaft 1 rotates, the inner pipe 12 rotates together with the main shaft; the upper end opening of the water return channel 13 is communicated with a water return cavity 65 through a gap between the outer side surface of the inner pipe 12 and the inner side surface of the central hole of the rotary joint flange 63.

The water return port 66 is fixedly connected to one side of the fixing part 62, and the water return port 66 is communicated with the water return channel 13 through the water return cavity 65; the water inlet 67 is fixedly connected to the upper part of the fixing part 62, and the water inlet 67 is communicated with the upper end opening of the water inlet channel 14.

Two rotary joint sealing rings 68 are arranged at the upper part of the backwater cavity 65 at intervals up and down, each rotary joint sealing ring 68 is sleeved on the outer ring of the upper end of the inner pipe 12, and the rotary joint sealing ring 68 is sealed between the water inlet 67 and the backwater cavity 65.

After entering the water inlet 67, the cooling water enters the water inlet channel 14 from the upper end opening of the water inlet channel 14, then enters the cooling water circulation channel inlet of the stirring rake 9 from the water inlet hole 22, then flows out from the cooling water circulation channel outlet after passing through the execution unit of the stirring rake 9, then enters the water return channel 13 from the water return hole 23, then enters the water return port 66 from the upper end opening of the water return channel 13, and finally flows out from the water return port 66.

As shown in fig. 12 to 16, the transmission 7 includes a case 71, a first end cover 72, a second end cover 73, a third end cover 74, a fourth end cover 75, an input mechanism 76, an output mechanism 77, a driving gear 78, and a driven gear 79.

The box body 71 is a hollow cuboid; two opposite vertical side plates of the box body 71 are respectively provided with an input shaft mounting hole, and the two input shaft mounting holes are oppositely arranged; the first end cover 72 and the second end cover 73 are respectively covered on the outer sides of the two input shaft mounting holes, and an input shaft through hole is formed in the center of the first end cover 72.

The box body 71 is positioned between the bottom plate 51 and the top plate 52 of the bracket 5, output shaft mounting holes are respectively formed in a top horizontal plate and a bottom horizontal plate of the box body 71, and the two output shaft mounting holes are oppositely arranged; the third end cover 74 covers the outer side of the output shaft mounting hole on the top horizontal plate, the fourth end cover 75 covers the outer side of the output shaft mounting hole on the bottom horizontal plate, and output shaft through holes are respectively formed in the centers of the third end cover 74 and the fourth end cover 75.

The input mechanism 76 includes a first bearing 761, a second bearing 762, an input shaft 763, an input shaft key slot 764, an input shaft flange 765, an input shaft seal 766, and a retainer 767.

The axes of the first bearing 761 and the second bearing 762 are both arranged along the horizontal direction and are respectively and fixedly connected in the two input shaft mounting holes, and the first bearing 761 and the second bearing 762 are respectively positioned at the inner sides of the first end cover 72 and the second end cover 73.

Input shaft 763 includes input shaft main part, input shaft spindle nose, input shaft retaining ring, the input shaft main part is the cylinder, the input shaft spindle nose is less than for the diameter the cylinder and the fixed connection of input shaft main part diameter are in the one end of input shaft main part, the input shaft retaining ring is ring cylinder and fixed connection be in the outer lane of input shaft main part, input shaft spindle nose, the coaxial setting of input shaft retaining ring, input shaft main part, input shaft spindle nose, input shaft retaining ring structure as an organic whole.

The axis of the input shaft 763 is along the horizontal direction, two ends of the input shaft main body are respectively connected in the bearing holes of the first bearing 761 and the second bearing 762, one end of the input shaft main body connected with the input shaft head extends out of the box body 71 from the input shaft through hole, the other end of the input shaft main body is positioned on the inner side of the second end cover 73, and the input shaft retainer ring is positioned on one side of the inner cavity of the box body 71 close to the first bearing 761.

An input shaft key slot 764 is formed in the side wall of the input shaft head at the end of the input shaft 763 extending out of the box 71.

The input shaft flange 765 comprises a connecting sleeve, a flange plate, a shaft head mounting cavity and a connecting sleeve key groove; the connecting sleeve and the flange are both cylinders and are coaxially arranged, and one end of the connecting sleeve is fixedly connected with one end of the flange; the other end of the connecting sleeve is provided with a shaft head mounting cavity which is a cylinder and is coaxial with the connecting sleeve; the inner side surface of the shaft head mounting cavity is provided with a connecting sleeve key groove; the connecting sleeve is sleeved on the outer ring of the input shaft head through the shaft head mounting cavity, and two sides of an input shaft connecting key are respectively mounted in an input shaft key groove 764 and the connecting sleeve key groove, so that an input shaft 763 is in key connection with an input shaft flange 765; an output end flange is fixedly connected to an output shaft of the motor, and an input shaft flange 765 is fixedly connected with the output end flange through bolts.

The input shaft sealing ring 766 is a lip sealing ring, and the input shaft sealing ring 766 is arranged between the first bearing 761 and the first end cover 72, is sleeved on the outer ring of the input shaft main body, and is used for sealing lubricating oil.

A retainer ring 767 is disposed in the interior cavity of the housing 71 and fits over the outer race of the input shaft body on the side thereof adjacent the second bearing 762.

the output mechanism 77 includes a third bearing 771, a fourth bearing 772, an output shaft 773, a spindle mounting hole 774, an output shaft keyway 775, and an output shaft seal 776.

the axes of the two third bearings 771 are both arranged along the vertical direction and are respectively and fixedly connected to the two output shaft mounting holes, and the two third bearings 771 are respectively located at the inner sides of the third end cover 74 and the fourth end cover 75.

the output shaft 773 comprises an output shaft main body and bearing connecting ends, the output shaft main body is a cylinder, the two bearing connecting ends are cylinders with diameters smaller than the diameter of the output shaft main body, the two bearing connecting ends are fixedly connected to the two ends of the output shaft main body respectively and are coaxially arranged with the output shaft main body, and the output shaft main body and the two bearing connecting ends are of an integral structure.

The axis of the output shaft 773 is along the vertical direction, and two bearing connecting ends are respectively connected in the bearing holes of the third bearing 771 and the fourth bearing 772, and the two bearing connecting ends respectively extend out of the box body 71 from the two output shaft through holes, and the main body of the output shaft is positioned in the inner cavity of the box body 71.

The output shaft 773 is provided with a spindle mounting hole 774 penetrating from the upper end to the lower end thereof, and the spindle mounting hole 774 is cylindrical and is coaxial with the output shaft 773.

The upper end of the second step 112 of the outer tube 11 protrudes beyond the third step 113 and is clamped in the lower opening of the spindle mounting hole 774.

an output shaft key groove 775 is formed in the inner side face of the spindle mounting hole 774, the output shaft 773 is sleeved on the outer ring of the spindle 1 through the spindle mounting hole 774 in an empty sleeve mode, and two sides of a spindle connecting key are respectively installed in the transmission device mounting mechanism 4 and the output shaft key groove 775 to connect the spindle 1 with the output shaft 773 in a key mode.

The output shaft seal 776 adopts lip type seal, and two output shaft seal 776 establish respectively between third bearing 771 and third end cover 74 and between fourth bearing 772 and fourth end cover 75, and two output shaft seal 776 overlap respectively in the outer lane of two bearing connection ends for sealed lubricating oil.

A steering mechanism is arranged between the input shaft 763 and the output shaft 773, and can convert the rotation of a horizontal shaft into the rotation of a vertical shaft; the steering mechanism comprises a driving gear 78 and a driven gear 79, the driving gear 78 and the driven gear 79 both adopt helical gears, and the steering mechanism can also adopt bevel gears, worm gears and the like; the driving gear 78 is fixedly connected to the middle of the outer ring of the input shaft main body, the input shaft retainer ring is positioned between the driving gear 78 and the first bearing 761, and the retainer ring 767 is positioned between the driving gear 78 and the second bearing 762; the driven gear 79 is fixedly connected to the middle of the outer ring of the output shaft main body, the driving gear 78 and the driven gear 79 are installed in a 90-degree crossed mode in the inner cavity of the box body 71, and the driving gear 78 and the driven gear 79 are in matched transmission.

The rotation of the output shaft of the motor drives the input shaft 763 to rotate, so as to drive the driving gear 78 to rotate, the driving gear 78 drives the driven gear 79 to rotate, so as to drive the output shaft 773 to rotate, and the output shaft 773 drives the main shaft 1 to rotate. The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a rabbling mechanism of perpendicular agitator which characterized in that: comprises a main shaft (1), a rabble connecting mechanism (2), a rotary joint connecting mechanism (3), a transmission device mounting mechanism (4), a rotary joint (6) and a transmission device (7); the axis of the main shaft (1) is in the vertical direction, and the main shaft (1) is connected in a bearing with the axis arranged in the vertical direction; the stirring rake connecting mechanism (2) is fixedly connected to the lower end of the main shaft (1); the rotary joint connecting mechanism (3) is fixedly connected to the upper end of the main shaft (1), and the rotary joint (6) is connected with the main shaft (1) through the rotary joint connecting mechanism (3); transmission installation mechanism (4) are established the middle part of main shaft (1), the output of transmission (7) passes through transmission installation mechanism (4) are connected main shaft (1), drive arrangement is connected to the input of transmission (7).

2. The stirring mechanism of a vertical stirrer according to claim 1, wherein: the main shaft (1) comprises an outer pipe (11), an inner pipe (12), a water return channel (13), a water inlet channel (14) and a fixed block (15); the axis of the outer pipe (11) is along the vertical direction, an outer pipe cavity penetrating from the upper end to the lower end of the outer pipe (11) is formed in the outer pipe (11), and the outer pipe cavity and the outer pipe (11) are coaxially arranged; the inner pipe (12) is fixedly connected in the outer pipe cavity and is coaxially arranged with the outer pipe (11); a gap formed between the outer side surface of the inner pipe (12) and the inner side surface of the outer pipe (11) is a water return channel (13); the inner pipe (12) is provided with a water inlet channel (14) which penetrates from the upper end to the lower end of the inner pipe, and the water inlet channel (14) and the inner pipe (12) are coaxially arranged; the inner pipe (12) and the outer pipe (11) are fixedly connected through the fixing blocks (15), one ends of the fixing blocks (15) are fixedly connected to the outer side face of the inner pipe (12), and the other ends of the fixing blocks are fixedly connected to the inner side face of the outer pipe (11).

3. The stirring mechanism of a vertical stirrer according to claim 2, wherein: the rabble connecting mechanism (2) comprises a main shaft lower end flange (21), a water inlet hole (22), a water return hole (23), a first sealing groove (24) and a second sealing groove (25); the main shaft lower end flange (21) is coaxially arranged with the main shaft (1), and the main shaft lower end flange (21) is fixedly connected to the lower end of the main shaft (1); the center of the lower end flange (21) of the main shaft is provided with a water inlet hole (22) penetrating from the top surface to the bottom surface of the main shaft, and the water inlet hole (22) and the water inlet channel (14) are coaxially arranged and are communicated with the water inlet channel (14); the flange (21) at the lower end of the main shaft is also provided with a plurality of water return holes (23) penetrating from the top surface to the bottom surface of the flange, each water return hole (23) is positioned on the outer ring of the water inlet hole (21) and the inner ring of the water return channel (13), each water return hole (23) is uniformly distributed on the outer ring of the water inlet hole (22), and the axis of each water return hole (23) is vertically communicated with the water return channel (13); a first sealing groove (24) and a second sealing groove (25) are formed in the bottom surface of the main shaft lower end flange (21); the first sealing groove (24) is positioned on the outer ring of the water inlet hole (22) and the inner ring of the water return hole (23), and the second sealing groove (25) is positioned on the outer ring of the water return hole (23); the first sealing groove (24) and the second sealing groove (25) are both annular, and a first sealing ring and a second sealing ring are respectively arranged in the first sealing groove (24) and the second sealing groove (25).

4. The stirring mechanism of a vertical stirrer according to claim 2, wherein: the rotary joint connecting mechanism (3) comprises a stop block (31) and a loop flange (32); an annular stop block mounting groove is formed in the outer ring of the upper end of the outer pipe (11), the stop block (31) comprises two Harvard blocks which are fixedly connected to two sides in the stop block mounting groove respectively, and the outer side surface of the stop block (31) is an inclined surface which is gradually folded inwards from top to bottom; a stop block mounting hole penetrating from the top surface to the bottom surface of the loop flange (32) is formed in the loop flange, and the inner side surface of the stop block mounting hole is an inclined surface matched with the outer side surface of the stop block (31); the movable sleeve flange (32) is sleeved on the outer ring of the stop block (31), the inner side face of the stop block mounting hole is attached to the outer side face of the stop block (31), and the stop block (31) and the movable sleeve flange (32) are spliced into a flange structure which is coaxial with the main shaft (1).

5. The stirring mechanism of a vertical stirrer according to claim 4, wherein: the rotary joint (6) comprises a rotary part (61), a fixed part (62), a rotary joint flange (63), a sealing washer (64), a water return cavity (65), a water return opening (66), a water inlet (67) and a rotary joint sealing ring (68); the rotating part (61) is arranged below the fixed part (62), and the rotating part (61) is rotatably connected with the fixed part (62); the rotary joint flange (63) is fixedly connected to the lower end of the rotary part (61), the rotary joint flange (63) is fixedly connected with the loop flange (32), and a sealing gasket (64) is arranged between the bottom of the rotary joint flange (63) and the upper end of the outer pipe (11); the rotary joint flange (63) is fixedly connected with the loop flange (32), and a sealing gasket is arranged between the bottom of the rotary joint flange (63) and the upper end of the outer pipe (11); the inner cavity of the rotating part (61) is communicated with the inner cavity of the fixing part (62) to form the water return cavity (65), and the central hole of the rotating joint flange (63) is communicated with the water return cavity (65); the upper part of the inner pipe (12) extends into the water return cavity (65) from the central hole of the rotary joint flange (63) and can rotate in the water return cavity (65); the upper part of the inner pipe (12) extends into the water return cavity (65) from the central hole of the rotary joint flange (63), and the inner pipe (12) can rotate in the water return cavity (65); an opening at the upper end of the water return channel (13) is communicated with the water return cavity (65) through a gap between the outer side surface of the inner pipe (12) and the inner side surface of the central hole of the rotary joint flange (63); the water return port (66) is fixedly connected to one side of the fixing part (62), and the water return port (66) is communicated with the water return channel (13) through the water return cavity (65); the water inlet (67) is fixedly connected to the upper part of the fixing part (62), and the water inlet (67) is communicated with an upper end opening of the water inlet channel (14); a plurality of rotary joint sealing rings (68) are arranged at the upper part of the water return cavity (65) at intervals up and down, each rotary joint sealing ring (68) is sleeved on the outer ring of the upper end of the inner pipe (12), and the rotary joint sealing rings (68) are sealed between the water inlet (67) and the water return cavity (65).

6. The stirring mechanism of a vertical stirrer according to any one of claims 1 to 5, wherein: the stirring mechanism of the vertical stirrer further comprises a support (5), wherein the support (5) comprises a bottom plate (51), a top plate (52), a supporting structure (53), a lower bearing seat (54), an upper bearing seat (55) and a main shaft bearing (56); the bottom plate (51) is horizontally arranged, the top plate (52) is horizontally arranged below the bottom plate (51), through holes with axes along the vertical direction are formed in the centers of the bottom plate (51) and the top plate (52), and the through holes in the bottom plate (51) and the through holes in the top plate (52) are coaxially arranged; the supporting structure (53) is fixedly connected between the bottom plate (51) and the top plate (52); the lower bearing seat (54) is arranged below the bottom plate (51) and is fixedly connected with the bottom plate (51); the upper bearing seat (55) is arranged above the top plate (52) and is fixedly connected with the top plate (52); main shaft bearings (56) are respectively arranged in inner cavities of the lower bearing seat (54) and the upper bearing seat (55), and each main shaft bearing (56) is coaxially arranged with a through hole in the bottom plate (51) and a through hole in the top plate (52); the main shaft (1) sequentially penetrates through the lower bearing seat (54), the through hole in the bottom plate (51), the through hole in the top plate (52) and the upper bearing seat (55) and is connected to bearing holes of the main shaft bearings (56), the stirring rake connecting mechanism (2) is located below the lower bearing seat (54), and the rotary joint connecting mechanism (3) is located above the upper bearing seat (55).

7. The stirring mechanism of a vertical stirrer according to claim 6, wherein: the main shaft (1) comprises an outer pipe (11), and the axis of the outer pipe (11) is along the vertical direction; the outer tube (11) comprises a first step part (111), a second step part (112) and a third step part (113), the first step part (111), the second step part (112) and the third step part (113) are fixedly connected from bottom to top in sequence, the first step part (111), the second step part (112) and the third step part (113) are vertically arranged cylinders, the diameters of the first step part (111), the second step part (112) and the third step part (113) are reduced in sequence, and the first step part (111), the second step part (112) and the third step part (113) are coaxially arranged; the part of the upper end of the first step part (111) protruding out of the outer ring of the second step part (112) is clamped on the lower end opening outer ring of the lower bearing seat (54); the part of the upper end of the second step part (112) protruding out of the outer ring of the third step part (113) is clamped at the lower end of the transmission device (7).

8. The stirring mechanism of a vertical stirrer according to any one of claims 1 to 5, wherein: the transmission device (7) comprises an input mechanism (76) and an output mechanism (77); the input mechanism (76) comprises an input shaft (763), the axis of the input shaft (763) is in the horizontal direction, and the input shaft (763) is connected in a bearing with the axis arranged in the horizontal direction; the output mechanism (77) comprises an output shaft (773) and a spindle mounting hole (774); the axis of the output shaft (773) is in the vertical direction, and the output shaft (773) is connected in a bearing with the axis arranged in the vertical direction; a spindle mounting hole (774) penetrating from the upper end to the lower end of the output shaft (773) is formed in the output shaft (773), and the spindle mounting hole (774) and the output shaft (773) are coaxially arranged; a steering mechanism is arranged between the input shaft (763) and the output shaft (773), and the steering mechanism can convert the rotation of a horizontal shaft into the rotation of a vertical shaft.

9. The stirring mechanism of a vertical stirrer according to claim 8, wherein: the input mechanism (76) further comprises an input shaft keyway (764) and an input shaft flange (765); an input shaft key slot (764) is formed in one end of the input shaft (763); the input shaft flange (765) comprises a connecting sleeve, a flange plate, a shaft head mounting cavity and a connecting sleeve key groove; the connecting sleeve and the flange plate are coaxially arranged, and one end of the connecting sleeve is fixedly connected to one end of the flange plate; the other end of the connecting sleeve is provided with a shaft head mounting cavity which is coaxial with the connecting sleeve; the inner side surface of the shaft head mounting cavity is provided with a connecting sleeve key groove; the connecting sleeve is sleeved on the outer ring of the input shaft head through the shaft head mounting cavity, two sides of an input shaft connecting key are respectively mounted in the input shaft key groove (764) and the connecting sleeve key groove, and the input shaft (763) is connected with the input shaft flange (765) in a key mode;

10. The stirring mechanism of a vertical stirrer according to claim 9, wherein: the transmission device (7) further comprises a box body (71), a first end cover (72), a second end cover (73), a third end cover (74), a fourth end cover (75), a driving gear (78) and a driven gear (79);