CN210287588U

CN210287588U - Wood fiber grinding device

Info

Publication number: CN210287588U
Application number: CN201920925596.4U
Authority: CN
Inventors: 柴轻
Original assignee: Southeast Ecological Restoration Co ltd
Current assignee: Southeast Ecological Restoration Co ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-04-10
Anticipated expiration: 2029-06-19

Abstract

The utility model discloses a wood fiber grinder, including preheating bin, the storehouse of cooking and grinding chamber, through feeding screw connection between preheating bin and the storehouse of cooking, the storehouse of cooking passes through pay-off screw connection with the grinding chamber, be equipped with the reduction gear between motor and the wooden plug spiral, the reduction gear is equipped with cooling device I outward, be equipped with oil inlet and oil-out on the reduction gear, the oil inlet passes through the tube coupling with the oil-out, be provided with oil pump and cooling device II on the pipeline, under the effect of oil pump, lubricating oil in the reduction gear can follow in the reduction gear after cooling back get back to in the reduction gear through cooling device II. When the grinding device is used, the temperature stability of the motor can be guaranteed, the phenomenon that the motor is overheated and stops production due to heat transfer to the motor is avoided, an effective protection effect can be achieved on the motor, and meanwhile continuous production is guaranteed.

Description

Wood fiber grinding device

Technical Field

The utility model relates to a grinder, concretely relates to wood fiber grinder.

Background

Wood fiber is a mechanical tissue composed of thickened cell walls and fibrous cells having fine crevice-like pores, which are lignified, and is one of the main components constituting xylem. The wood fiber used in the textile and clothing industry is viscose fiber which is converted from wood pulp through a production process and is cellulose fiber. The method comprises the steps of crushing wood, cooking at high temperature to prepare wood pulp, removing sugar and lipid in the wood pulp, extracting plant cellulose, and remolding cellulose molecules to obtain the textile raw material.

The grinding device is an indispensable device for producing wood fiber, and in the process of producing wood fiber, the cut wood chips are preheated, cooked and then ground, the wood chips are ground into wood fibers, the wood chips are sent into a preheating bin for preheating, then the preheated wood chips are transported to a cooking bin through a spiral feeding device for cooking, when feeding, wood chips are required to be spirally compressed at a plug pipe to form a plug, so that a larger torque needs to be input to the plug screw, a motor and a reducer are matched to drive the plug screw to work in the prior art, because the working temperature of the cork screw connected with the speed reducer is higher, part of heat can be conducted to the speed reducer along the cork screw, and the speed reducer has higher load, higher working environment temperature and other factors, so that the working temperature of the speed reducer is higher; generally, a protection device is directly arranged in the speed reducing motor, when the working temperature of the speed reducing motor exceeds a safety value, the spiral feeding device is automatically closed, so that the speed reducing motor is stopped and cooled, and the speed reducing motor is restarted when being cooled to a normal value, therefore, the speed reducing motor is frequently started and stopped, the service life of the motor can be shortened, the continuous production is influenced, and the production efficiency of products is reduced.

The application numbers are: the utility model discloses a CN201720701185.8 utility model discloses a spiral feeding device of a defibrator, which comprises a wood plug screw, a wood plug screw driving motor, a speed reducer and a bearing box for conveying wood chips in a preheating bin to a cooking cylinder, a lubricating oil circulating cooling device is arranged outside the speed reducer, the lubricating oil circulating cooling device comprises a heat exchanger, a lubricating oil circulating outlet is arranged at the upper part of the shell of the speed reducer, a lubricating oil circulating inlet is arranged at the lower part of the shell of the speed reducer, two ends of a lubricating oil flow passage of the heat exchanger are respectively connected with the lubricating oil circulating outlet and the lubricating oil circulating inlet of the shell of the speed reducer through oil pipes to form a lubricating oil circulating loop, two ends of a cooling water flow passage of the heat exchanger are respectively connected with a cooling water inlet pipe and a cooling water return pipe, a lubricating oil forced circulation pump is arranged in the lubricating oil circulating loop, the working temperature, the production line does not need to be stopped for cooling, the requirement of long-time uninterrupted production of the hot-pressed fiberboard production line can be met, and the service life of a driving motor is long; in can reducing heat transfer to gear motor through this mode, play the effect of protection to gear motor, however, its cooling effect should remain to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome heat transfer on the cork spiral of defibrator to gear motor in, make gear motor overheated, frequently open and stop gear motor and not only can shorten gear motor's life-span, and simultaneously, still can make the production interrupt, the shortcoming of product production efficiency has been reduced, a wood fiber grinder is provided, this grinder is when using, can guarantee the temperature stability of motor, avoid leading to the motor overheated shutdown because of heat transfer to motor, can play effectual guard action to the motor, the continuous of production has also been guaranteed simultaneously.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides a wood fiber grinder, includes preheating bin, the storehouse of cooking and grinding chamber, through feeding screw connection between preheating bin and the storehouse of cooking, the storehouse of cooking passes through pay-off screw connection with the grinding chamber, its characterized in that: the feeding screw and the feeding screw respectively comprise an outer barrel, a wood plug screw and a motor, the wood plug screw is installed in the outer barrel, one end of the wood plug screw extends out of the outer barrel, a feeding hole and a discharging hole are formed in the outer barrel, the motor is connected with the wood plug screw, a speed reducer is arranged between the motor and the speed reducer, the speed reducer and the wood plug screw are connected through a coupling, a cooling device I is arranged outside the speed reducer, the cooling device I can cover the speed reducer, an oil inlet and an oil outlet are formed in the speed reducer, the oil inlet and the oil outlet are connected through a pipeline, an oil pump and a cooling device II are arranged on the pipeline, and under the action of the oil pump, lubricating oil in the speed reducer can be discharged from the speed reducer and then cooled through the cooling device II.

The cooling device I comprises a shell, the shell covers a speed reducer, a plurality of pipelines are arranged in the shell, a plurality of spray heads are arranged on each pipeline, the water spraying direction of each spray head faces the speed reducer, the pipelines are connected with a water source through a water pump, an air pipe is further arranged in the shell, and the air pipe is connected with a fan.

The coupler comprises a left connecting portion and a right connecting portion, a heat insulation pad is arranged between the left connecting portion and the right connecting portion, and the left connecting portion is connected with the right connecting portion through bolts.

The cooling device II comprises a cooling chamber I, a plurality of cooling pipes are arranged in the cooling chamber I, the cooling pipes are in a vortex line type, the adjacent cooling pipes are connected end to end, spray heads connected with a water source are arranged at the top and the peripheral side wall of the cooling chamber I, an inverted U-shaped pipe is arranged on the side wall of the cooling chamber I, one end of the opening of the U-shaped pipe is close to the bottom of the cooling chamber I, and the other end of the opening of the U-shaped pipe extends out of the side wall of the cooling chamber I; the cooling pipe close to the bottom of the cooling chamber I is connected with the oil outlet through a pipeline, and the cooling pipe close to the top of the cooling chamber I is connected with the oil inlet through a pipeline.

The cooling device II further comprises a cooling chamber II, alcohol spray heads are arranged on the top and the peripheral side walls of the cooling chamber II, a first cooling pipe is arranged in the cooling chamber II, the first cooling pipe is bent continuously and integrally in a square, cuboid or cylinder shape after being bent, the alcohol spray heads face the bending position of the cooling pipe, a ventilation pipeline is further arranged on the top of the cooling chamber II, and a fan is arranged in the ventilation pipeline; the cooling pipe close to the top of the cooling chamber I is connected with the end part of a first cooling pipe located at the bottom of the cooling chamber II, and the end part of the first cooling pipe close to the top of the cooling chamber II is connected with the oil inlet through a pipeline.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the wood chips are preheated by the preheating bin, then are transferred to the cooking bin for cooking under the action of the feeding screw, and then enter the grinding chamber for grinding into wood fibers under the action of the feeding screw; when feeding, the wood plug screw is driven by the motor to rotate in the outer barrel so as to realize the purpose of feeding, a feeding port and a discharging port which are arranged on the outer barrel are convenient for feeding and discharging, a speed reducer is arranged between the motor and the wood plug screw, so that the motor and the speed reducer jointly realize the function of a speed reducing motor, a cooling device I is arranged outside the speed reducer to cool the whole outside of the speed reducer, meanwhile, lubricating oil in the speed reducer is cooled by a cooling device II, the purpose of internal and external dual cooling is realized, heat transmitted on the wood plug screw can be dissipated at the speed reducer, and the heat is blocked from being transmitted to the motor, so that the motor can be protected by dual cooling through the cooling device I and the cooling device II, the motor can continuously run, the influence of the heat transmitted from the outside on the motor is avoided, and the motor cannot be frequently started or stopped in the running process, the service life of the motor is ensured, the interruption of production is further avoided, the purpose of continuous production is realized, and the production efficiency is ensured; meanwhile, the motor is connected with the speed reducer through the coupler, the speed reducer is connected with the wood plug screw through the coupler, the coupler is arranged to reduce heat transfer to a certain degree, and the operation of the motor is further guaranteed.

2. The cooling device I comprises a shell, wherein the shell covers a speed reducer, a plurality of pipelines are arranged in the shell, each pipeline is provided with a plurality of spray heads, the water spraying direction of each spray head faces the speed reducer, the pipeline is connected with a water source through a water pump, an air pipe is further arranged in the shell, and the air pipe is connected with a fan; the arrangement is that the spray head arranged on the pipeline sprays water to the outer shell of the speed reducer to cool the outer shell, so that heat generated by the wood plug screw and transmitted to the speed reducer is cooled, the heat can be dissipated at the speed reducer, and the heat is reduced and transmitted to the motor after passing through the speed reducer; simultaneously, under the effect of fan for outside cold wind can Europe enter into the casing in, takes away partial heat, and simultaneously, the water that sprays on the reduction gear shell carries out the rapid evaporation under the effect of wind, takes away the heat on the reduction gear shell through the mode of evaporation, avoids the high temperature of reduction gear, carries out rapid cooling to it.

3. The shaft coupling includes left connecting portion and right connecting portion, is equipped with the heat insulating mattress between left connecting portion and the right connecting portion, and left connecting portion pass through bolted connection with right connecting portion, like this, can reduce thermal transmission, plays the effect of separation to thermal transmission.

4. The utility model discloses a set up the cooling tube in cooling chamber I, the cooling tube has a plurality ofly and is end to end, each cooling tube is the vortex line type, will constitute a cooling pipeline after a plurality of cooling tubes link to each other like this, lubricating oil in the reduction gear flows out from the reduction gear under the effect of oil pump, and flow back to in the reduction gear behind the cooling pipeline, through the shower nozzle that sets up at cooling chamber I top and lateral wall all around, spray water to the cooling pipeline, carry out the heat transfer with the heat that lubricating oil takes in the cooling pipeline, reduce the temperature of lubricating oil, and the cooling tube that is the vortex line type has greatly increased the distance of lubricating oil in cooling chamber I, the time of heat transfer has greatly been prolonged, and then the effect of heat transfer has been guaranteed, the heat on cooling pipeline surface is taken away to the water that the shower nozzle spun; more importantly, an inverted U-shaped pipe is arranged on the side wall of the cooling chamber I, one end of the opening of the U-shaped pipe is close to the bottom of the cooling chamber I, and the other end of the opening of the U-shaped pipe extends out of the side wall of the cooling chamber I; due to the arrangement, a water area is formed at the bottom of the cooling chamber I, a part of a cooling pipeline is arranged in the water area, water sprayed by the spray head is gathered in the water area in the cooling chamber I, the part of the cooling pipeline is directly cooled, and heat exchange is directly carried out between the spray head and the water, so that lubricating oil is radiated; the purpose of reducing the temperature of lubricating oil is realized, and then the heat that the wooden plug spiral was wiped the transmission and the heat that reduction gear self produced is dispelled, avoids on heat transfer to the motor, plays the effect of protection to it.

5. The cooling device II of the utility model also comprises a cooling chamber II, and the first cooling pipe is cooled by the arranged alcohol spray head to accelerate the heat exchange speed, the first cooling pipe is continuously bent and is integrally square, cuboid or cylinder after being bent, the arrangement ensures that the first cooling pipe in the cooling chamber II is long enough to ensure the heat exchange effect, the alcohol spray head sprays alcohol to lead the alcohol to flow down along the first cooling pipe to ensure the rapid heat exchange, meanwhile, the air in the cooling chamber II is in a flowing state through the arranged air pipeline and the fan, the heat is taken away by the evaporation of the alcohol, thus, the lubricating oil passes through the cooling chamber I and the cooling chamber II in sequence to lead the heat in the lubricating oil to be rapidly dissipated, and the heat transferred from the cork screw can be dissipated at the reducer, heat transfer to the motor is avoided.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is the overall structure schematic diagram of the cooling device of the present invention.

Fig. 3 is a schematic view of the cooling tube structure of the present invention.

Fig. 4 is a schematic structural view of the first cooling tube of the present invention after being bent.

Reference numerals: 1 preheating bin, 2 stewing bin, 3 grinding chamber, 4 feeding screws, 5 feeding screws, 6 outer cylinders, 7 cork screws, 8 motors, 9 reducers, 10 couplers, 11 shells, 12 pipelines, 13 pipelines, 14 spray heads, 15 water pumps, 16 water sources, 17 cooling devices II, 18 air pipes, 19 fans, 20 water outlets, 21 driving motors, 22 cooling chambers I, 23 cooling pipes, 24U-shaped pipes, 25 cooling chambers II, 25 first cooling pipes, 27 ventilating pipes, 28 collecting pipes, 29 first shells, 30 baffles, 31 oil pumps and 32 alcohol spray heads.

Detailed Description

The present invention will be further described with reference to the following examples, which are only some, but not all, of the examples of the present invention. Based on the embodiments in the present invention, other embodiments used by those skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

The device comprises a preheating bin 1, a cooking bin 2 and a grinding chamber 3, wherein the preheating bin 1 is connected with the cooking bin 2 through a feeding screw 4, the cooking bin 2 is connected with the grinding chamber 3 through a feeding screw 5, the feeding screw 4 and the feeding screw 5 both comprise an outer barrel 6, a wood plug screw 7 and a motor 8, the wood plug screw 7 is installed in the outer barrel 6, one end of the wood plug screw extends out of the outer barrel 6, a feeding port and a discharging port are formed in the outer barrel 6, the motor 8 is connected with the wood plug screw 7, a speed reducer 9 is arranged between the motor 8 and the wood plug screw 7, the motor 8 and the speed reducer 9 and the wood plug screw 7 are connected through a coupler 10, a cooling device I is arranged outside the speed reducer 9, the cooling device I can cover the speed reducer 9, an oil inlet and an oil outlet are formed in the speed reducer 9, and the oil inlet, the pipeline 12 is provided with an oil pump 31 and a cooling device II 17, and under the action of the oil pump 31, lubricating oil in the speed reducer 9 can be discharged from the speed reducer 9 and then cooled by the cooling device II 17 to return to the speed reducer 9.

The cooling device I comprises a shell 11, the shell 11 covers a speed reducer 10, a plurality of pipelines 13 are arranged in the shell 11, a plurality of spray heads 14 are arranged on each pipeline 13, the water spraying direction of each spray head 14 faces the speed reducer 9, the pipelines 13 are connected with a water source 16 through a water pump 15, an air pipe 18 is further arranged in the shell 11, and the air pipe 18 is connected with a fan 19.

In order to facilitate the installation of the cooling device I, the shell 11 can be arranged into an upper part and a lower part which are connected in a buckling way; the housing 11 also needs to be provided with a drain opening 20.

The number of the pipes 13 and the number of the nozzles 14 may be set according to actual conditions.

The coupler 10 comprises a left connecting portion and a right connecting portion, a heat insulation pad is arranged between the left connecting portion and the right connecting portion, and the left connecting portion is connected with the right connecting portion through bolts.

Wherein the grinding disc of the grinding chamber 3 is connected with a drive motor 21.

Example 2

The embodiment is further optimized on the basis of embodiment 1, in this embodiment, the cooling device ii 17 includes a cooling chamber i 22, a plurality of cooling pipes 23 are arranged in the cooling chamber i 22, the cooling pipes 23 are in a vortex line shape, adjacent cooling pipes 23 are connected end to end, the top and peripheral side walls of the cooling chamber i 22 are provided with spray heads 14 connected with a water source 16, an inverted U-shaped pipe 24 is arranged on the side wall of the cooling chamber i 22, one end of an opening of the U-shaped pipe 24 is close to the bottom of the cooling chamber i 22, and the other end of the opening of the U-shaped pipe extends out of the side wall of the cooling chamber i 22; the cooling pipe 23 close to the bottom of the cooling chamber I22 is connected with an oil outlet through a pipeline 12, and the cooling pipe 23 close to the top of the cooling chamber I22 is connected with an oil inlet through a pipeline 12.

The water source 16 connected to the spray head 14 arranged in the cooling chamber I22 and the water source 16 connected to the spray head 14 in the cooling device I can be the same water source 16 or can be independent water sources.

It should be noted that a ventilation pipe may be provided in the cooling chamber i 22, and the fan 19 is installed in the ventilation pipe; the heat exchange efficiency in the cooling chamber I22 is improved.

Further preferably, the cooling device II 17 further comprises a cooling chamber II 25, alcohol spray heads 32 are arranged on the top and the peripheral side wall of the cooling chamber II 25, a first cooling pipe 26 is arranged in the cooling chamber II 25, the first cooling pipe 26 is bent continuously, and the whole cooling chamber II 25 is a cube, a cuboid or a cylinder after being bent, the alcohol spray heads 32 face the bending part of the cooling pipe 23, a ventilation pipeline 27 is further arranged on the top of the cooling chamber II 25, and a fan 19 is arranged in the ventilation pipeline 27; the cooling pipe 23 close to the top of the cooling chamber I22 is connected with the end part of the first cooling pipe 26 at the bottom of the cooling chamber II 25, and the end part of the first cooling pipe 26 close to the top of the cooling chamber II 25 is connected with the oil inlet through the pipeline 12.

Wherein the alcohol spray head 32 is connected with the alcohol source through a water pump 15.

In the present embodiment, the first cooling pipe 26 is bent to have a rectangular parallelepiped structure as a whole.

The bottom of the cooling chamber II 25 is connected with a collecting pipe 28, and the collecting pipe 28 is connected with a storage box, so that sprayed alcohol can be conveniently collected.

It should be noted that the cooling chamber i 22 and the cooling chamber ii 25 may share one air source, that is, share one fan.

The cooling chamber i 22 and the cooling chamber ii 25 are disposed in a same non-heat-conductive first shell 29, and a baffle 30 is disposed inside the first shell 29 to divide the shell 11 into two independent areas to form the cooling chamber i 22 and the cooling chamber ii 25; therefore, the structure of the device is more compact, and the volume is reduced.

Therefore, when the grinding device operates, heat on the cork screws 7 can be directly transferred to the speed reducer 9, the heat is transferred in the gear pair in the speed reducer 9, most of the heat is further transferred to lubricating oil, the temperature of the lubricating oil is increased, the temperature of the lubricating oil is transferred to the shell of the speed reducer 9, and meanwhile, the gear pair can also generate heat in the motion process, so that the temperature of the lubricating oil in the speed reducer 9 is increased; at the moment, the spray head 14 arranged on the pipeline 13 sprays water under the action of the water pump 15, the shell of the speed reducer 9 is cooled in a spraying mode, and meanwhile, the fan 19 blows air into the shell 11, so that the air circulation speed in the shell 11 is increased, the evaporation of sprayed water is accelerated, the heat on the shell 11 is taken away, and the speed reducer 9 is cooled; meanwhile, the arranged heat insulation pad can separate the motor 8 from the speed reducer 9 and separate the speed reducer 9 from the wood plug screw 7, so that the heat transfer is reduced.

Meanwhile, the lubricating oil in the speed reducer 9 is sequentially cooled in the cooling chamber I22 and the cooling chamber II 25 under the action of the oil pump 31, the cooling pipes 23 are arranged in the cooling chamber I22, the cooling pipes 23 are connected end to end, each cooling pipe 23 is in a vortex line type, thus a cooling pipeline is formed after the cooling pipes 23 are connected, the lubricating oil in the speed reducer 9 flows out of the speed reducer 9 under the action of the oil pump 31 and flows back to the speed reducer 9 after passing through the cooling pipeline, the cooling pipeline is sprayed with water through the spray heads 14 arranged at the top and the peripheral side walls of the cooling chamber I22, the heat of the lubricating oil in the cooling pipeline is subjected to heat exchange, the temperature of the lubricating oil is reduced, the route of the lubricating oil in the cooling chamber I22 is greatly increased through the vortex line type cooling pipes 23, the heat exchange time is greatly prolonged, and the heat exchange effect is further ensured, the water sprayed by the spray head 14 takes away the heat on the surface of the cooling pipeline; more importantly, an inverted U-shaped pipe 24 is arranged on the side wall of the cooling chamber I22, one end of the opening of the U-shaped pipe 24 is close to the bottom of the cooling chamber I22, and the other end of the opening of the U-shaped pipe extends out of the side wall of the cooling chamber I22; the arrangement is that a water area is formed at the bottom of the cooling chamber I22, a part of the cooling pipeline is arranged in the water area, water sprayed by the spray head 14 is gathered in the cooling chamber I22 to fill the water area, the part of the cooling pipeline is directly cooled, so that lubricating oil is radiated, meanwhile, the hot water at the bottom can be ensured to be rapidly discharged through the arranged inverted U-shaped pipe 24, meanwhile, the spray head 14 supplements the water area, so that the temperature in the water area is also kept in a stable state, and the radiation of the cooling pipeline 23 12 is facilitated; the purpose of reducing the temperature of the lubricating oil is achieved, and then the heat transferred by the wooden plug screw 7 and the heat generated by the speed reducer 9 are dissipated, so that the heat is prevented from being transferred to the motor 8, and the motor is protected.

In cooling chamber II 25, cool down first cooling tube 26 through the alcohol shower nozzle 32 that sets up, accelerate the speed of heat transfer, first cooling tube 26 is the form of bending in succession, and bend the back whole be the square, cuboid or cylinder, set up like this and make first cooling tube 26 in cooling chamber II 25 long enough, guarantee the effect of its heat transfer, alcohol shower nozzle 32 sprays alcohol, make alcohol flow down along first cooling tube 26, guarantee going on fast of heat transfer, reach fan 19 in the air duct 27 through setting up simultaneously, make the inside air of cooling chamber II 25 also be the state that flows, take away the heat through the rapid evaporation of alcohol.

In this way, the cooling device I can directly cool the shell 11 of the speed reducer 9 by spraying, ventilating, evaporating and cooling the shell 11 of the speed reducer 9, so that the temperature in the speed reducer 9 is lower, and the transferred heat and the heat generated by the speed reducer 9 can be quickly dissipated; meanwhile, lubricating oil inside the speed reducer 9 flows out of the pipeline 12 and then sequentially passes through the cooling pipe 23 in the cooling chamber I22 and the first cooling pipe 26 in the cooling chamber II 25, the temperature of the lubricating oil is further reduced, the lubricating oil inside the speed reducer 9 can rapidly bring out heat, the temperature inside the speed reducer 9 is guaranteed to be low, the heat transmitted by the wood plug screw 7 can be cut off when the speed reducer 9 is located, redundant heat is prevented from being transmitted to the motor 8, heat dissipation can be achieved in the process of transmission, the temperature of the motor 8 is guaranteed not to rise due to external reasons, frequent shutdown of the motor 8 due to overhigh temperature is avoided, continuous production is guaranteed, and production efficiency is guaranteed.

Claims

1. The utility model provides a wood fiber grinder, includes preheating bin, the storehouse of cooking and grinding chamber, through feeding screw connection between preheating bin and the storehouse of cooking, the storehouse of cooking passes through pay-off screw connection with the grinding chamber, its characterized in that: the feeding screw and the feeding screw respectively comprise an outer barrel, a wood plug screw and a motor, the wood plug screw is installed in the outer barrel, one end of the wood plug screw extends out of the outer barrel, a feeding hole and a discharging hole are formed in the outer barrel, the motor is connected with the wood plug screw, a speed reducer is arranged between the motor and the speed reducer, the speed reducer and the wood plug screw are connected through a coupling, a cooling device I is arranged outside the speed reducer, the cooling device I can cover the speed reducer, an oil inlet and an oil outlet are formed in the speed reducer, the oil inlet and the oil outlet are connected through a pipeline, an oil pump and a cooling device II are arranged on the pipeline, and under the action of the oil pump, lubricating oil in the speed reducer can be discharged from the speed reducer and then cooled through the cooling device II.

2. The wood fiber grinding apparatus according to claim 1, wherein: the cooling device I comprises a shell, the shell covers a speed reducer, a plurality of pipelines are arranged in the shell, a plurality of spray heads are arranged on each pipeline, the water spraying direction of each spray head faces the speed reducer, the pipelines are connected with a water source through a water pump, an air pipe is further arranged in the shell, and the air pipe is connected with a fan.

3. The wood fiber grinding apparatus according to claim 1, wherein: the coupler comprises a left connecting portion and a right connecting portion, a heat insulation pad is arranged between the left connecting portion and the right connecting portion, and the left connecting portion is connected with the right connecting portion through bolts.

4. The wood fiber grinding apparatus according to claim 1, wherein: the cooling device II comprises a cooling chamber I, a plurality of cooling pipes are arranged in the cooling chamber I, the cooling pipes are in a vortex line type, the adjacent cooling pipes are connected end to end, spray heads connected with a water source are arranged at the top and the peripheral side wall of the cooling chamber I, an inverted U-shaped pipe is arranged on the side wall of the cooling chamber I, one end of the opening of the U-shaped pipe is close to the bottom of the cooling chamber I, and the other end of the opening of the U-shaped pipe extends out of the side wall of the cooling chamber I; the cooling pipe close to the bottom of the cooling chamber I is connected with the oil outlet through a pipeline, and the cooling pipe close to the top of the cooling chamber I is connected with the oil inlet through a pipeline.

5. A wood fiber grinding apparatus according to claim 4, wherein: the cooling device II further comprises a cooling chamber II, alcohol spray heads are arranged on the top and the peripheral side walls of the cooling chamber II, a first cooling pipe is arranged in the cooling chamber II, the first cooling pipe is bent continuously and integrally in a square, cuboid or cylinder shape after being bent, the alcohol spray heads face the bending position of the cooling pipe, a ventilation pipeline is further arranged on the top of the cooling chamber II, and a fan is arranged in the ventilation pipeline; the cooling pipe close to the top of the cooling chamber I is connected with the end part of a first cooling pipe located at the bottom of the cooling chamber II, and the end part of the first cooling pipe close to the top of the cooling chamber II is connected with the oil inlet through a pipeline.