CN116197013B

CN116197013B - Durable built-in bearing type grinding roller single-double support vertical mill capable of preventing oil leakage

Info

Publication number: CN116197013B
Application number: CN202310500848.XA
Authority: CN
Inventors: 倪鸣星; 李金荣; 聂建
Original assignee: Hefei Zhongya Building Material Equipment Co ltd
Current assignee: Hefei Zhongya Building Material Equipment Co ltd
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2023-07-21
Anticipated expiration: 2043-05-06
Also published as: CN116197013A

Abstract

The invention discloses a durable built-in bearing type grinding roller single-double support vertical mill capable of preventing oil leakage, which relates to the technical field of vertical mills and comprises the following components: a vertical mill mechanism; the grinding mechanism comprises grinding assemblies, and the two grinding assemblies are arranged on the vertical grinding mechanism. According to the invention, the lubricating oil leaked from the rotating shaft and the bearing flows into the oil storage groove, and the lubricating oil can be prevented from directly leaking through the matching of the oil leakage prevention sealing cover and the sealing ring, so that the cleanliness of equipment can be kept, and foreign matters can be blocked outside; when the oil absorption sponge moves to the bottommost part of the oil storage groove, lubricating oil positioned in the oil storage groove can be absorbed in the oil storage groove, and the absorbed lubricating oil can be smeared between the rotating shaft and the bearing again, so that the lubrication is kept continuously; through the meshing of location straight rack and straight gear two, can prevent that the worker's shape slider from sliding in arc sliding opening voluntarily, prevent that oil absorption sponge and rotation axis from producing too much friction.

Description

Durable built-in bearing type grinding roller single-double support vertical mill capable of preventing oil leakage

Technical Field

The invention relates to the technical field of vertical mills, in particular to a durable built-in bearing type grinding roller single-double-support vertical mill capable of preventing oil leakage.

Background

The vertical mill is a grinding device integrating fine crushing, drying, grinding, powder selecting and conveying, and is widely used for grinding various solid materials and superfine grinding in industries of cement, building materials, electric power, metallurgy, chemical industry, nonmetallic ores and the like. The grinding process of the vertical mill is completed by a set of grinding devices (namely a grinding roller and a grinding disc), and materials are ground into powder between the grinding roller and the grinding disc. The grinding device is rotated by the grinding disc and correspondingly drives the grinding roller to drive, and the grinding pressure is mainly used for pressurizing the grinding disc materials by a set of hydraulic device except the dead weight of the grinding roller. The milled material contains a large amount of coarse powder, the powder is selected by a matched powder selecting machine, the powder selecting process is that the powder is selected by air flow, most of the coarse powder automatically falls on a millstone in the air flow process, the coarse powder is received and ground again, and the rest of the coarse powder is selected by the powder selecting machine to be a finished product, and the finished product is sent to a finished product storage through a dust collection and conveying system. The residence time of the material on the grinding disc is mainly determined by three factors: firstly, the grinding disc speed affecting the centrifugal force; secondly, the friction between the material and the millstone and the internal friction of the material; thirdly, the structural form and the cooperation of the grinding disc and the grinding roller determine the motion stroke mode. The third factor is the key to determine the design thought of each vertical mill manufacturer, and the different mill roll and mill form determine the mill speed and material residence time on the mill of each manufacturer. When selecting the vertical mill, the user must select a proper vertical mill according to the characteristics of the ground materials.

Working principle: the motor drives the millstone to rotate through the vertical speed reducer, the solid raw material enters the center of the millstone from the feed inlet through the air locking feeding device, is thrown to the periphery of the millstone under the action of the centrifugal force field and is repeatedly crushed by the grinding roller to be crushed. The crushed materials overflow from the edge of the millstone, the powdery materials are carried up by high-speed air flow rising from the lower part of the machine, when the rising air flow and the powdery materials pass through the powder selecting machine at the upper part of the mill, under the action of a rotor rotating rapidly, coarse powder is separated out and falls into the center of the millstone to be ground again, fine powder is discharged from the upper part of the mill along with the air flow, and the fine powder is collected in a dust collecting device to obtain the product. The granular materials which are not taken away by the air flow are returned to the feeding port of the mill through the bucket elevator of the external circulation after overflowing the millstone, and enter the mill together with the newly fed raw materials for re-grinding. For materials with higher moisture content, hot air is introduced into the mill, and wet materials are fully contacted with hot air flow in the grinding, powder selecting and flowing processes to be dried, so that the moisture requirement of the product is met.

In the prior art, for example, the Chinese patent number is: CN217368740U "a vertical mill for paddy field herbicide production", comprising: the vertical mill, the middle part of vertical mill is equipped with the charge door, vertical mill's middle part is grinding portion, vertical mill upper portion is gyration lock wind feeding machine vertical mill's upper portion is equipped with the discharge gate, and the discharging pipe is connected to the discharge gate, the other end of discharging pipe is equipped with the feed proportioning bin, be equipped with the sieve in the feed proportioning bin the lower part of feed proportioning bin is equipped with coarse fodder mouth and fine fodder mouth, the coarse fodder mouth is located the front side of sieve, the fine fodder mouth is located the rear side of sieve, the feed return pipe is connected to the coarse fodder mouth lower extreme, the end of feed return pipe with the charge door intercommunication, the finished product pipe is connected to the fine fodder mouth lower extreme. The vertical mill has the beneficial effects that the material distribution bin is arranged on the vertical mill, the discharging from the discharging pipe is further screened, the yield of the material is ensured, coarse materials are returned to the vertical mill for grinding again, the screening accuracy can be improved due to the inclined arrangement of the screen plate, and excessive fine materials are prevented from falling into the coarse material opening.

However, in the prior art, no protection measures are provided between the shaft body and the bearing in the vertical mill, so that lubricating oil between the bearings can leak in the long-term use process, and meanwhile, foreign matters can easily enter the bearings, so that abnormal abrasion of the bearings is caused, and the service life is reduced.

Disclosure of Invention

The invention aims to solve the technical problems that lubricating oil between bearings leaks and foreign matters easily enter the bearings in the prior art to cause abnormal abrasion of the bearings, and provides a durable built-in bearing type grinding roller single-double-support vertical mill capable of preventing oil leakage.

In order to achieve the above purpose, the present invention provides the following technical solutions:

an oil leakage resistant durable built-in bearing type grinding roller single and double support vertical mill comprising:

a vertical mill mechanism (100);

the grinding mechanism (200) comprises grinding assemblies (210), two grinding assemblies (210) are respectively arranged on the vertical grinding mechanism (100), leakage-proof assemblies (220) for leakage prevention are respectively arranged on two sides of each grinding assembly (210), each leakage-proof assembly (220) is provided with a smearing assembly (230) for oil supplementing, and a positioning assembly (240) for limiting the movement of the smearing assembly (230);

one of said grinding assemblies (210) comprises at least one mounting arm (211):

the top inner ring of the mounting arm (211) is fixedly sleeved with a motor II (212), the bottom inner ring is fixedly sleeved with a rotating shaft, the output end of the motor II (212) is connected with a grinding roller (213) through a transmission shaft, the grinding roller (213) is positioned above the grinding disc (104), two ends of the rotating shaft are respectively provided with a fixing seat (214) through bearings, and the fixing seats (214) are arranged at the top of the supporting frame (102) through bolts I (215);

one of said leak-proof assemblies (220) comprises at least one leak-proof seal cap (221):

the oil leakage prevention sealing cover (221) is arranged on the side wall of the mounting arm (211) through a second bolt (222), the end part of the rotating shaft is positioned in the oil leakage prevention sealing cover (221), an oil storage groove (223) for containing lubricating oil is formed in the inner ring of the oil leakage prevention sealing cover (221), two arc sliding ports (224) are formed in one side, far away from the mounting arm (211), of the oil leakage prevention sealing cover (221), and an inner gear ring (225) is fixedly sleeved on the inner ring of the oil leakage prevention sealing cover (221);

one of said applicator assemblies (230) comprises at least two H-shaped sliders (2301):

the two I-shaped sliding blocks (2301) are respectively connected with the two arc-shaped sliding ports (224) in a sliding manner, one side of each I-shaped sliding block (2301) positioned in each oil leakage prevention sealing cover (221) is rotationally connected with a first connecting shaft (2302), one side of each I-shaped sliding block positioned outside each oil leakage prevention sealing cover (221) is fixedly connected with a second connecting shaft (2306), an oil absorption sponge (2304) and a first spur gear (2305) are fixedly sleeved on the outer ring of each first connecting shaft (2302), the outer ring of each oil absorption sponge (2304) is positioned in each oil storage groove, the end part of each oil absorption sponge is positioned between each rotating shaft and each bearing, and each first spur gear (2305) is meshed with the corresponding inner gear ring (225);

one of said positioning assemblies (240) comprises at least one fixed plate (241):

the fixed plate (241) is fixedly connected with the outer wall of the oil leakage prevention sealing cover (221), a sliding rod (242) is fixedly connected to the bottom of the fixed plate (241), a rack anti-falling plate (243) is fixedly connected to the bottom end of the sliding rod (242), and a positioning straight rack (244) is movably sleeved on the outer ring of the sliding rod (242).

Preferably:

the vertical mill mechanism (100) comprises a base (101):

the detachable support frame (102) and the first motor (103) are installed at the top of the base (101), the first motor (103) is provided with the grinding disc (104) through a speed reducer, and the grinding disc (104) is fixedly installed in the inner ring of the support frame (102).

Preferably:

one side fixedly connected with connecting seat one (216) of installation arm (211), the top fixedly connected with connecting seat two (217) of support frame (102), connecting seat two (217) articulates there is cylinder (218), the output of cylinder (218) articulates with connecting seat one (216).

Preferably:

a sealing ring is arranged between the oil leakage prevention sealing cover (221) and the mounting arm (211).

Preferably:

the connecting shaft II (2306) is far away from one end fixedly connected with of I-shaped slider (2301) and sways linking arm (2307), the fixed cover in inner circle of swaying linking arm (2307) is equipped with locating shaft (2309), the one end of locating shaft (2309) rotates with the outer wall of leak protection oil seal cover (221) and is connected, and the fixed cover in outer lane of locating shaft (2309) is equipped with straight-tooth wheel II (2310), two straight-tooth wheel II (2310) intermeshing, one side fixedly connected with gear torsional spring (2311) of swaying linking arm (2307) is kept away from to straight-tooth wheel II (2310), one end and the outer wall fixed connection of leak protection oil seal cover (221) of keeping away from straight-tooth wheel II (2311), one side welding that connecting shaft II (2306) was kept away from to sways linking arm (2307) has lifting rod I (2308).

Preferably:

the positioning spur rack (244) is meshed with two spur gears (2310).

Preferably:

the outer ring movable sleeve of the sliding rod (242) is provided with a return spring (245), two ends of the return spring (245) are fixedly connected with a rack anti-falling plate (243) and a positioning straight rack (244) respectively, and one side, far away from the oil leakage prevention sealing cover (221), of the positioning straight rack (244) is fixedly connected with a lifting rod II (246).

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, the lubricating oil leaked from the rotating shaft and the bearing flows into the oil storage groove, and the lubricating oil can be prevented from directly leaking through the matching of the oil leakage prevention sealing cover and the sealing ring, so that the cleanliness of equipment can be kept, and foreign matters can be blocked outside;

2. according to the invention, when the oil absorption sponge moves to the bottommost part of the oil storage groove, the lubricating oil positioned in the oil storage groove can be absorbed, and the absorbed lubricating oil can be smeared between the rotating shaft and the bearing again, so that the lubrication is kept continuously;

3. according to the invention, the H-shaped sliding block can be prevented from automatically sliding in the arc sliding port by the engagement of the positioning straight rack and the straight gear II, so that excessive friction between the oil absorption sponge and the rotating shaft is prevented.

Drawings

FIG. 1 is a schematic view of the overall structure of a durable oil-leakage-proof vertical mill with single and double support bearing grinding rolls according to an embodiment of the present invention;

FIG. 2 is a schematic view of the overall structure of a vertical mill mechanism in a durable built-in bearing type grinding roller single and double support vertical mill for oil leakage prevention according to an embodiment of the present invention;

FIG. 3 is a schematic view of the overall structure of a grinding mechanism in a durable oil-leakage-proof built-in bearing type grinding roller single-double support vertical mill according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of the structure at A of a durable built-in bearing type grinding roller single and double support vertical mill for oil leakage prevention according to an embodiment of the present invention;

FIG. 5 is a schematic view of the overall structure of a leak-proof assembly in a durable double-support vertical mill with built-in bearing grinding rolls for leak-proof according to one embodiment of the invention;

FIG. 6 is a schematic view of the overall structure of a smearing assembly in a durable double-support vertical mill with built-in bearing grinding rolls for oil leakage prevention in accordance with an embodiment of the present invention;

fig. 7 is a schematic view showing the overall structure of a positioning assembly in a durable oil-leakage-preventing built-in bearing type grinding roller single-double support vertical mill according to an embodiment of the present invention.

In the figure:

100. a vertical mill mechanism; 101. a base; 102. a support frame; 103. a first motor; 104. grinding disc; 200. a polishing mechanism; 210. grinding components; 211. a mounting arm; 212. a second motor; 213. grinding roller; 214. a fixing seat; 215. a first bolt; 216. a first connecting seat; 217. a second connecting seat; 218. a cylinder; 220. a leak-proof assembly; 221. an oil leakage prevention sealing cover; 222. a second bolt; 223. an oil storage groove; 224. an arc sliding port; 225. an inner gear ring; 230. a smearing component; 2301. an I-shaped sliding block; 2302. a first connecting shaft; 2304. an oil absorbing sponge; 2305. a spur gear I; 2306. a second connecting shaft; 2307. swinging the connecting arm; 2308. lifting a first pull rod; 2309. positioning a shaft; 2310. a spur gear II; 2311. a gear torsion spring; 240. a positioning assembly; 241. a fixing plate; 242. a slide bar; 243. a rack anti-falling plate; 244. positioning a straight rack; 245. a return spring; 246. and a lifting rod II.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-7, in this embodiment, a durable built-in bearing type grinding roller single/double support vertical mill capable of preventing oil leakage includes:

a vertical mill mechanism 100; the grinding mechanism 200, the grinding mechanism 200 comprises grinding assemblies 210, two grinding assemblies 210 are mounted on the vertical grinding mechanism 100, leakage-proof assemblies 220 for leakage prevention are mounted on two sides of the grinding assemblies 210, each leakage-proof assembly 220 is provided with an smearing assembly 230 for oil supplementing, and a positioning assembly 240 for limiting movement of the smearing assembly 230; the vertical mill mechanism 100 includes a base 101: the top of the base 101 is provided with a detachable support frame 102 and a motor I103, the motor I103 is provided with a grinding disc 104 through a speed reducer, and the grinding disc 104 is fixedly arranged in the inner ring of the support frame 102.

Specifically, the first motor 103 drives the grinding disc 104 to operate through the speed reducer after being started, so that the materials above the grinding disc are driven to rotate, the grinding disc 104 increases the stability of the grinding disc through the supporting frame 102, and meanwhile the compression of the grinding disc 104 to the speed reducer can be relieved.

The placement mechanism 2 is further described in order to facilitate a thorough understanding of the specific structure and principles of the grinding assembly 210 by those skilled in the art. In this embodiment, a grinding assembly 210 includes at least one mounting arm 211: the top inner ring of the mounting arm 211 is fixedly sleeved with a second motor 212, the bottom inner ring is fixedly sleeved with a rotating shaft, the output end of the second motor 212 is connected with a grinding roller 213 through a transmission shaft, the grinding roller 213 is positioned above the grinding disc 104, both ends of the rotating shaft are provided with fixing seats 214 through bearings, and the fixing seats 214 are arranged at the top of the support frame 102 through bolts 215; one side of the mounting arm 211 is fixedly connected with a first connecting seat 216, the top of the supporting frame 102 is fixedly connected with a second connecting seat 217, the second connecting seat 217 is hinged with an air cylinder 218, and the output end of the air cylinder 218 is hinged with the first connecting seat 216.

Specifically, the second motor 212 drives the grinding roller 213 to rotate through the transmission shaft, and the rotation direction of the grinding roller 213 is opposite to the rotation direction of the grinding disc 104, so that the material can be ground and crushed, when the shutdown maintenance is required, the second motor 212 needs to be stopped, and then the air cylinder 218 is started to drive the mounting arm 211 to turn over with the rotation shaft as the axis until the grinding roller 213 is far away from the grinding disc 104.

The tin plating mechanism 3 is further described in order to facilitate a thorough understanding of the specific structure and principles of the leak prevention assembly 220 by those skilled in the art. In this embodiment, a leak-proof assembly 220 includes at least one leak-proof seal housing 221: the oil leakage prevention sealing cover 221 is mounted on the side wall of the mounting arm 211 through a second bolt 222, the end part of the rotating shaft is positioned in the oil leakage prevention sealing cover 221, an oil storage groove 223 for containing lubricating oil is formed in the inner ring of the oil leakage prevention sealing cover 221, and two arc sliding openings 224 are formed in one side, away from the mounting arm 211, of the oil leakage prevention sealing cover 221; a sealing ring is arranged between the oil leakage prevention sealing cover 221 and the mounting arm 211, and an inner gear ring 225 is fixedly sleeved on the inner ring of the oil leakage prevention sealing cover 221.

Specifically, the oil leakage can be prevented by the engagement of the oil leakage prevention seal cover 221 and the seal ring, so that the device can be kept clean, foreign matters can be blocked outside, and the leaked oil between the rotating shaft and the bearing can flow into the oil storage groove 223 and be stored in the oil storage groove 223.

The tin plating mechanism 3 is further described in order to facilitate a thorough understanding of the specific structure and principles of the applicator assembly 230 by those skilled in the art. In this embodiment, one applicator assembly 230 includes at least two I-shaped sliders 2301: the two H-shaped sliding blocks 2301 are respectively connected with the two arc sliding ports 224 in a sliding way, one side of the H-shaped sliding blocks 2301, which is positioned in the oil leakage prevention sealing cover 221, is rotationally connected with a first connecting shaft 2302, one side, which is positioned outside the oil leakage prevention sealing cover 221, is fixedly connected with a second connecting shaft 2306, an oil absorption sponge 2304 and a first spur gear 2305 are fixedly sleeved on the outer ring of the first connecting shaft 2302, the outer ring of the oil absorption sponge 2304 is positioned in the oil storage groove 223, the end part of the oil absorption sponge is positioned between the rotating shaft and the bearing, and the first spur gear 2305 is meshed with the inner gear ring 225 for transmission; one end of the second connecting shaft 2306 far away from the H-shaped slider 2301 is fixedly connected with a swinging connecting arm 2307, an inner ring of the swinging connecting arm 2307 is fixedly sleeved with a positioning shaft 2309, one end of the positioning shaft 2309 is rotatably connected with the outer wall of the oil leakage prevention sealing cover 221, an outer ring of the positioning shaft 2309 is fixedly sleeved with a second spur gear 2310, the two second spur gears 2310 are meshed with each other, one side of the second spur gear 2310 far away from the swinging connecting arm 2307 is fixedly connected with a gear torsion spring 2311, one end of the gear torsion spring 2311 far away from the second spur gear 2310 is fixedly connected with the outer wall of the oil leakage prevention sealing cover 221, and one side of the swinging connecting arm 2307 far away from the second connecting shaft 2306 is welded with a first lifting rod 2308.

Specifically, after the oil absorbing sponge 2304 moves to the bottom of the lubricating oil storage groove 223, the oil absorbing sponge 2304 absorbs lubricating oil therein, then pulls any one lifting rod one 2308 to drive the swinging connecting arm 2307 to swing around the positioning shaft 2309, at this time, the connecting shaft two 2306, the i-shaped slider 2301, the connecting shaft one 2302 and the oil absorbing sponge 2304 swing together, the spur gear one 2305 drives the connecting shaft one 2302 and the oil absorbing sponge 2304 to rotate together through meshing with the inner gear ring 225 in the swinging process, so that leaked lubricating oil can be smeared between the rotating shaft and the bearing again through the oil absorbing sponge 2304, and meanwhile, the positioning shaft 2309 drives the spur gear two 2310 to rotate together, and through meshing of the two spur gears two 2310, the swinging connecting arm 2307 can be driven to perform mirror image movement together, so that the smearing speed is improved.

The tin plating mechanism 3 is further described in order to facilitate a thorough understanding of the specific structure and principles of the positioning assembly 240 by those skilled in the art. In this embodiment, one positioning assembly 240 includes at least one fixing plate 241: the fixed plate 241 is fixedly connected with the outer wall of the oil leakage prevention sealing cover 221, the bottom of the fixed plate 241 is fixedly connected with a sliding rod 242, the bottom end of the sliding rod 242 is fixedly connected with a rack anti-falling plate 243, the outer ring of the sliding rod 242 is movably sleeved with a positioning straight rack 244, and the positioning straight rack 244 is meshed with two straight gears 2310; the outer ring of the sliding rod 242 is movably sleeved with a return spring 245, two ends of the return spring 245 are fixedly connected with a rack anti-falling plate 243 and a positioning straight rack 244 respectively, and a lifting rod II 246 is fixedly connected to one side of the positioning straight rack 244 away from the oil leakage prevention sealing cover 221.

Specifically, the force of the return spring 245 keeps the positioning spur rack 244 engaged with the two spur gears 2310 all the time, so as to prevent the positioning shaft 2309 from rotating, and further limit the sliding of the i-shaped slider 2301 in the arc-shaped sliding opening 224, only when the second pulling rod 246 is pulled down until the positioning spur rack 244 is disengaged from the two spur gears 2310, the i-shaped slider 2301 is released from the limitation and can slide in the arc-shaped sliding opening 224.

Working principle: the first motor 103 drives the grinding disc 104 to operate through a speed reducer after being started, so that the upper material is driven to rotate, the grinding disc 104 increases the stability of the grinding disc through the support frame 102, meanwhile, the pressing of the grinding disc 104 to the speed reducer can be relieved, the second motor 212 drives the grinding roller 213 to rotate through a transmission shaft, the rotation direction of the grinding roller 213 is opposite to that of the grinding disc 104, and therefore, the material can be ground and crushed, when shutdown maintenance is needed, the second motor 212 is required to be stopped, and then the air cylinder 218 is started to drive the mounting arm 211 to turn over by taking the rotation shaft as the axis until the grinding roller 213 is far away from the grinding disc 104;

can prevent through the cooperation of leak protection oil seal cover 221 and sealing washer that lubricating oil directly spills to can keep the clean and tidy of equipment, simultaneously can also intercept the foreign matter outside, lubricating oil that spills from between rotation axis and the bearing can flow into the inside of oil storage recess 223, store by oil storage recess 223, after lubricating oil stores certain weight, pull down lift rod two 246 until location spur rack 244 breaks away from the meshing with two spur gear two 2310, at this moment, I shape slider 2301 will remove the restriction, after oil absorption sponge 2304 removes to the bottom of storage lubricating oil storage recess 223, oil absorption sponge 2304 can adsorb wherein lubricating oil, then pull arbitrary lift rod one 2308 and drive swing connecting arm 2307 and use locating shaft 2309 to swing as the axle center, at this moment connecting shaft two 2306, I2302 and oil absorption sponge 2304 can swing together, spur gear one 2305 can drive connecting shaft one 2302 and oil absorption sponge 2304 through the meshing with the ring 225 and rotate together, thereby can smear between the rotation axis 2310 and the vibration axis two vibration rod 2304 again, can carry out the axial connection through the vibration rod two vibration rod 2300, thereby can keep the axial vibration of rolling connection between the two vibration rod 2300, and the vibration rod can be accomplished at the same time, and two vibration rod 2300 can be kept the arc-shaped slider position at the end position of two vibration rod 2300 is rotated at the end of the back of the axial connection position of two vibration rod 2300.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. An oil leakage preventing durable built-in bearing type grinding roller single-double support vertical mill, which is characterized by comprising:

a vertical mill mechanism (100);

2. The oil leakage resistant durable built-in bearing type grinding roller single and double support vertical mill according to claim 1, wherein:

the vertical mill mechanism (100) comprises a base (101):

3. The oil leakage resistant durable built-in bearing type grinding roller single and double support vertical mill according to claim 1, wherein:

4. The oil leakage resistant durable built-in bearing type grinding roller single and double support vertical mill according to claim 1, wherein:

5. The oil leakage resistant durable built-in bearing type grinding roller single and double support vertical mill according to claim 1, wherein:

6. The oil leakage resistant durable built-in bearing type grinding roller single and double support vertical mill according to claim 5, wherein:

the positioning spur rack (244) is meshed with two spur gears (2310).

7. The oil leakage resistant durable built-in bearing type grinding roller single and double support vertical mill according to claim 1, wherein: