阅读说明：本技术 一种煤矿大型设备轴瓦改造方法 (Method for modifying bearing bush of coal mine large-scale equipment ) 是由 杨杰 李刚 于 2020-12-24 设计创作，主要内容包括：本发明公开了一种煤矿大型设备轴瓦改造方法,步骤一：准备工作,定制两套与改造轴瓦相同型号的轴瓦,轴瓦的顶瓦和底瓦设置开口,提升机房正对主轴的一侧挖设有锚桩坑；步骤二：搭建起重架,制作起重架的支腿,起重架的支腿吊入提升机房,两组支腿分别立设在提升机滚筒大轴轴端的两侧,固定支腿,起重架的两个支腿处挂设用于调整位置的电动起重机；步骤三：拆下滚筒上的钢丝绳,将两个罐笼放至井底,井筒内的钢丝绳与提升机的天轮台固定,滚筒大轴的两侧与起重机固定连接,拆除与轴瓦连接的附件；步骤四：更换轴瓦,滚筒大轴放置在轴瓦底部；步骤五：研瓦,将轴瓦多次研磨,轴瓦固定安装在瓦座中；步骤六：试车；步骤七：提升机缠绳。(The invention discloses a method for modifying a bearing bush of coal mine large-scale equipment, which comprises the following steps: preparing, customizing two sets of bearing bushes with the same model as the modified bearing bush, arranging openings on a top bush and a bottom bush of each bearing bush, and digging an anchor pile pit on one side of the lifting machine room, which is opposite to the main shaft; step two: building a hoisting frame, manufacturing supporting legs of the hoisting frame, hoisting the supporting legs of the hoisting frame into a hoisting machine room, respectively vertically arranging two groups of supporting legs at two sides of the end of a large shaft of a drum of the hoisting machine, fixing the supporting legs, and hanging an electric crane for adjusting the position at the two supporting legs of the hoisting frame; step three: the steel wire rope on the roller is detached, the two cages are placed at the bottom of the well, the steel wire rope in the shaft is fixed with a head sheave table of a hoist, two sides of a large shaft of the roller are fixedly connected with the hoist, and accessories connected with the bearing bush are detached; step four: replacing the bearing bush, and placing the large roller shaft at the bottom of the bearing bush; step five: grinding the bearing bush, namely grinding the bearing bush for multiple times, and fixedly installing the bearing bush in a bush seat; step six: trial run; step seven: and (5) winding a rope on the hoisting machine.)

1. A method for modifying a bearing bush of coal mine large equipment is characterized by comprising the following steps:

the method comprises the following steps: preparing, customizing two sets of bearing bushes with the same model as the modified bearing bush, arranging openings on a top bush and a bottom bush of each bearing bush, and digging an anchor pile pit on one side of the lifting machine room, which is opposite to the main shaft;

step two: building a hoisting frame, manufacturing supporting legs of the hoisting frame, hoisting the supporting legs of the hoisting frame into a hoisting machine room, respectively vertically arranging two groups of supporting legs at two sides of the end of a large shaft of a drum of the hoisting machine, fixing the supporting legs, and hanging an electric crane for adjusting the position at the two supporting legs of the hoisting frame;

step three: the steel wire rope on the roller is disassembled, the two cages are placed to the bottom of the well, the steel wire rope in the shaft is fixed with a head sheave table of a hoist, the remaining steel wire rope on the roller is disassembled, a brake block of a brake disc is loosened, two sides of a large shaft of the roller are fixedly connected with a crane, and accessories connected with a bearing bush are disassembled;

step four: replacing the bearing bush, and placing the large roller shaft at the bottom of the bearing bush;

step five: grinding the bearing bush, namely grinding the bearing bush for multiple times, and fixedly installing the bearing bush in a bush seat;

step six: trial run;

step seven: and (5) winding a rope on the hoisting machine.

2. The method for reconstructing the bearing bush of the large-scale coal mine equipment, according to claim 1, is characterized in that: in the first step, the anchor pile pit is 15m away from the elevator machine room, the length of the anchor pile pit is 1.5m, the width of the anchor pile pit is 1m, the depth of the anchor pile pit is 1.5m, and the anchor pile pit is filled after a steel wire rope with the diameter of 6 multiplied by 19-phi 12.5mm is pre-buried in the anchor pile pit to be used as a reserved rope.

3. The method for reconstructing the bearing bush of the large-scale coal mine equipment, according to claim 1, is characterized in that: in the second step, the supporting legs of the crane are composed of two groups of four seamless steel pipes with phi 150mm multiplied by 12m, two seamless steel pipes in each group are fixed in a crossed mode, one end of each seamless steel pipe is wound by a hemp rope, the length of the hemp rope winding is 0.8m, a steel wire rope with 6 multiplied by 19-phi 15.5mm is additionally arranged on the hemp rope for fixed winding, and each group of supporting legs is wound by 30 circles to form the supporting leg with the height of 6m of the hoisting frame.

4. The method for reconstructing the bearing bush of the large-scale coal mine equipment, according to claim 1, is characterized in that: detaching the roof of the hoisting machine room by the fixed support legs in the second step, and hoisting the support legs of the hoisting frame from the roof by a 250KN automobile crane, wherein the two groups of support legs are respectively vertically arranged at two sides of the end of a large shaft of the hoisting machine roller; the supporting legs of the two hoisting frames are tensioned through a steel wire rope with the diameter of 6 multiplied by 19-phi 15.5mm, the steel wire rope is fixedly hung on a stay rope arranged in the anchor pile pit and tensioned, a 32T electric crane for adjusting the position is hung at the two supporting legs of the hoisting frames, and the lifting point of the 32T electric crane is positioned at the center of the top of the bearing bush.

5. The method for reconstructing the bearing bush of the large-scale coal mine equipment, according to claim 1, is characterized in that: in the third step, a gap of 5mm is arranged between the brake and the roller brake disc, wire rope buckles of 6 multiplied by 19-phi 28mm are hung on two sides of the large roller shaft, and the large roller shaft is fixedly hung with the 32T electric crane through the wire rope buckles; and removing the coupling of the large shaft of the roller and the reducer of the hoister.

6. The method for reconstructing the bearing bush of the large-scale coal mine equipment, according to claim 1, is characterized in that: in the fourth step, a top cover of the bearing bush is opened, the large roller shaft is lifted by 30mm, the top bush of the bearing bush is lifted, a bush opening at one end of a bottom bush of the bearing bush is supported by a drill rod, the bottom bush is taken out through a bush opening at the other end, danhong is coated at the shaft end of the large roller shaft, the bottom bush is placed in a bush seat, the large 32T electric crane shaft falls down, two bolts are arranged at the opposite corners of the top cover of the bearing bush for fastening, 5 circles of 6 multiplied by 19-phi 15.5mm steel wire ropes are arranged on an auxiliary roller arranged on one side of the roller for winding, and the auxiliary roller is pulled to rotate for two circles by a JD-25 small winch.

7. The method for reconstructing the bearing bush of the large-scale coal mine equipment, according to claim 1, is characterized in that: in the fifth step, when the bearing bush is ground for the first time, the shaft head of the bearing bush is coated with the red lead, the main shaft of the hoister is rotated by arranging the JD-25 small winch, the top bush and the bottom bush of the bearing bush are taken out, the indentations on the top bush and the bottom bush are scraped by arranging the scraper, when the bearing bush is scraped, when the contact surface reaches 50%, the part of the bearing bush with larger red lead coloring points is lightly scraped, the positions with no or few red lead coloring points are not scraped, the oil groove capable of preventing the bearing bush is scraped by the top bush, the bush opening gap of the top bush is adjusted, the copper sheet for adjusting the gap thickness is placed at the joint of the bearing bush, the thickness of the copper sheet is 0.02mm, the bearing bush is arranged in the bush seat, the bearing bush is covered by the bush cover, and.

8. The method for reconstructing the bearing bush of the large-scale coal mine equipment, according to claim 1, is characterized in that: and in the sixth step, after the bearing bush is installed, an accessory is installed and connected, the brake of the brake disc is adjusted, the gap of the brake shoe is smaller than or equal to 2mm, a lubricating oil pump is started firstly during test run, an oil cup of the bearing bush is observed, after lubricating oil in the oil cup reaches the bottom bush, the test run is carried out at the speed of 2m/s, and the temperature of the bearing bush is detected after the test run is carried out for 10 minutes.

9. The method for reconstructing the bearing bush of the large-scale coal mine equipment, according to claim 1, is characterized in that: and seventhly, fixedly clamping an auxiliary hoisting machine in the hoisting machine room with a clamping plate on one side of the roller through a steel wire rope, winding the steel wire rope of the auxiliary hoisting machine on the auxiliary roller through rotation of the roller, loosening a rope buckle of the steel wire rope locked by the head sheave table after the steel wire rope of the head sheave table is tensioned, hanging an auxiliary tank, fixing the auxiliary tank on a tank supporting seat arranged at the well mouth, and opening the clutch of the hoisting machine and winding the rope by the main roller.

10. The method for reconstructing the bearing bush of the large-scale coal mine equipment, according to claim 1, is characterized in that: the deviation of the elevation of the main shaft axis of the hoister is less than or equal to 50mm, the position deviation of the hoisting center line of the hoister is less than or equal to 5mm, the verticality of the main shaft axis of the hoister and the hoisting center line is less than or equal to one-five thousandth of zero, and a bearing beam of the hoister is in close contact with a bearing seat; the bearing bush is tightly attached to a bearing seat of the elevator, but the bearing bush can rotate when the bearing bush is tapped, the contact arc surface between the shaft neck of the elevator spindle and the middle part of the bottom bush is 100 degrees, and the gap between the shaft neck of the elevator spindle and the top of the bearing bush is 0.3 mm.

Technical Field

The invention belongs to the technical field of coal mine equipment modification, and particularly relates to a coal mine large-scale equipment bearing bush modification method.

Background

At present, because of long-term operation, the large shaft jumping amplitude is found to be large in the maintenance process of the mine hoister, the bearing bush clearance is found to be too large through inspection, and through measurement, the abrasion of the main shaft bearing bush exceeds the specification, so that great potential safety hazards exist, two pairs of new main shaft bearing bushes need to be replaced, and the bearing bushes are replaced by fully utilizing the production stoppage maintenance time. The construction of replacing the bearing bush is arranged in detail in the early stage, and the construction processes of technical preparation, construction of a hoisting frame, bearing bush grinding and the like before construction are summarized. Through the inspection and the overhaul of the large-scale equipment, the difficult problem in production is solved on the basis of eliminating the potential safety hazard, and corresponding experience is accumulated.

Ventilation and drainage are kept underground during the period of production stoppage and maintenance, and because the hoister cannot be lifted during the period of bearing bush replacement, the construction time requirement is short, and the construction scheme is more scientific and reasonable. The preparation work before underground production and production halt is well arranged, underground ventilation and drainage are guaranteed during the bearing bush replacement, the longest time of maintenance cannot exceed 72h, the communication system is guaranteed to be smooth, and ground personnel are in contact with underground personnel regularly. The quality of a main shaft and a roller of the elevator cannot be disintegrated at 60t, the maintenance work needs to be specifically arranged, the labor organization is strong, and the time influencing the production is reduced as much as possible. On the premise of ensuring the system function and safety, the existing parts and materials are fully used, and the cost for replacing the bearing bush is reduced.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method for modifying a bearing bush of large-scale equipment in a coal mine, wherein in the process of replacing the bearing bush of a hoisting machine, the preparation work is sufficient, the pertinence of the overhaul content is strong, and the sudden failure of the equipment in operation is effectively avoided; the bearing bush replacement is fully prepared, and corresponding materials and auxiliary equipment are prepared, so that some service facilities can be operated perfectly and smoothly, and the one-time replacement and transformation time is greatly saved.

In order to achieve the purpose, the invention adopts the technical scheme that: the method comprises the following steps: preparing, customizing two sets of bearing bushes with the same model as the modified bearing bush, arranging openings on a top bush and a bottom bush of each bearing bush, and digging an anchor pile pit on one side of the lifting machine room, which is opposite to the main shaft; step two: building a hoisting frame, manufacturing supporting legs of the hoisting frame, hoisting the supporting legs of the hoisting frame into a hoisting machine room, respectively vertically arranging two groups of supporting legs at two sides of the end of a large shaft of a drum of the hoisting machine, fixing the supporting legs, and hanging an electric crane for adjusting the position at the two supporting legs of the hoisting frame; step three: the steel wire rope on the roller is disassembled, the two cages are placed to the bottom of the well, the steel wire rope in the shaft is fixed with a head sheave table of a hoist, the remaining steel wire rope on the roller is disassembled, a brake block of a brake disc is loosened, two sides of a large shaft of the roller are fixedly connected with a crane, and accessories connected with a bearing bush are disassembled; step four: replacing the bearing bush, and placing the large roller shaft at the bottom of the bearing bush; step five: grinding the bearing bush, namely grinding the bearing bush for multiple times, and fixedly installing the bearing bush in a bush seat; step six: trial run; step seven: and (5) winding a rope on the hoisting machine.

According to the technical scheme, in the first step, the distance between the anchor pile pit and the elevator machine room is 15m, the length of the anchor pile pit is 1.5m, the width of the anchor pile pit is 1m, the depth of the anchor pile pit is 1.5m, a steel wire rope with the diameter of 6 multiplied by 19-phi 12.5mm is pre-buried in the anchor pile pit to serve as a remaining rope, and then the anchor pile pit is filled.

In the second step, the support legs of the crane are formed by dividing four seamless steel pipes with phi 150mm multiplied by 12m into two groups, the two seamless steel pipes in each group are fixed in a crossed mode, one end of each seamless steel pipe is wound by a hemp rope, the length of the hemp rope is 0.8m, a steel wire rope with the diameter of 6 multiplied by 19-phi 15.5mm is additionally arranged on the hemp rope for fixed winding, and each group of support legs are wound by 30 circles to form support legs with the height of 6m of the hoisting frame.

According to the method for reconstructing the bearing bush of the coal mine large-scale equipment, the roof of the hoisting machine room is disassembled by fixing the supporting legs in the step two, the supporting legs of the hoisting frame are hung from the roof by a 250KN automobile crane, and the two groups of supporting legs are respectively vertically arranged on two sides of the end of a large shaft of the hoisting machine roller; the supporting legs of the two hoisting frames are tensioned through a steel wire rope with the diameter of 6 multiplied by 19-phi 15.5mm, the steel wire rope is fixedly hung on a stay rope arranged in the anchor pile pit and tensioned, a 32T electric crane for adjusting the position is hung at the two supporting legs of the hoisting frames, and the lifting point of the 32T electric crane is positioned at the center of the top of the bearing bush.

In the third step, a gap of 5mm is formed between the brake and the roller brake disc, wire rope buckles of 6 multiplied by 19-phi 28mm are hung on two sides of the large roller shaft, and the large roller shaft is fixedly hung with the 32T electric crane through the wire rope buckles; and removing the coupling of the large shaft of the roller and the reducer of the hoister.

According to the technical scheme, in the fourth step, a top cover of the bearing bush is opened, the large roller shaft is lifted by 30mm, a top bush of the bearing bush is lifted, a bush opening at one end of a bottom bush of the bearing bush is supported by a drill rod, the bottom bush is taken out through a bush opening at the other end, red lead is coated at the shaft end of the large roller shaft, the bottom bush is placed in a bush seat, the large 32T electric crane shaft falls down, two bolts are arranged at opposite corners of the top cover of the bearing bush for fastening, 5 circles of 6 multiplied by 19-phi 15.5mm steel wire ropes are arranged on an auxiliary roller arranged on one side of the roller for winding, and the auxiliary roller is pulled by a JD-25 small winch for two circles.

In the fifth step, when the bearing bush is firstly ground, the shaft head of the bearing bush is coated with red lead, the JD-25 small winch is arranged to rotate the main shaft of the elevator, the top bush and the bottom bush of the bearing bush are taken out, the scrapers are arranged to scrape indentations on the top bush and the bottom bush, when the contact surface reaches 50%, the part of the bearing bush with larger red lead coloring points is lightly scraped, the positions with no or few red lead coloring points are not scraped, the top bush is scraped with an oil groove capable of preventing the bearing bush, the gap between the bush openings of the top bush is adjusted, the copper sheet for adjusting the thickness of the gap is placed at the joint of the bearing bush, the thickness of the copper sheet is 0.02mm, the bearing bush is arranged in the bush seat, the bearing bush is covered by the bush cover, and the bearing bush is fixed by the bolts.

In the sixth step, after the bearing bush is installed, an accessory is installed and connected, a brake of the brake disc is adjusted, the gap of the brake shoe is smaller than or equal to 2mm, a lubricating oil pump is started firstly during test run, an oil cup of the bearing bush is observed, after lubricating oil in the oil cup reaches the bottom shoe, the vehicle is started at the speed of 2m/s, and the temperature of the bearing bush is detected after the vehicle runs for 10 minutes.

In the seventh step, an auxiliary hoisting machine in a hoisting machine room is fixedly clamped with a clamping plate on one side of a roller through a steel wire rope, the steel wire rope of the auxiliary hoisting machine is wound on the auxiliary roller through the rotation of the roller, after the steel wire rope of an overhead sheave table is tensioned, a rope buckle of the steel wire rope is locked by the overhead sheave table is loosened, an auxiliary tank is hung on a supporting tank seat arranged at a wellhead, and the hoisting machine is opened to be disengaged and the main roller is wound with a rope.

According to the technical scheme, the elevation deviation of the main shaft axis of the hoister is less than or equal to 50mm, the position deviation of the hoisting center line of the hoister is less than or equal to 5mm, the perpendicularity between the main shaft axis of the hoister and the hoisting center line is less than or equal to one-five thousandths of zero, and a bearing beam of the hoister is in close contact with a bearing seat; the bearing bush is tightly attached to a bearing seat of the elevator, but the bearing bush can rotate when the bearing bush is tapped, the contact arc surface between the shaft neck of the elevator spindle and the middle part of the bottom bush is 100 degrees, and the gap between the shaft neck of the elevator spindle and the top of the bearing bush is 0.3 mm.

By adopting the technical scheme, the preparation work is sufficient in the process of replacing the bearing bush of the elevator, the pertinence of the overhaul content is strong, and the sudden failure of equipment in operation is effectively avoided; the bearing bush replacement is fully prepared, and corresponding materials and auxiliary equipment are prepared, so that some service facilities can be operated perfectly and smoothly, and the one-time replacement and transformation time is greatly saved.

The invention will be explained in more detail below with reference to the drawings and examples.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

FIG. 1 is a schematic diagram of the process steps of the present invention;

fig. 2 is a front view of the hoist of the present invention;

fig. 3 is a side view of the hoist of the present invention;

labeled as: 1. a rope fastener; 2. a crane; 3. a support leg; 4. a drum; 5. and (6) anchoring a pile pit.

Detailed Description

The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail for the purpose of providing a more complete, accurate and thorough understanding of the inventive concepts and technical solutions of the present invention, including the shapes of the components, the structures, the mutual positions and connection relationships of the components, the functions and operating principles of the components, the manufacturing processes, the operation and use methods, and the like.

Example (b): the method for modifying the bearing bush of the large-scale coal mine equipment shown in the figure 1 comprises the following steps: preparing, customizing two sets of bearing bushes with the same model as the modified bearing bushes, wherein openings are formed in the top bush and the bottom bush of each bearing bush, and an anchor pile pit 5 is dug in one side, opposite to the main shaft, of the hoisting machine room; step two: building a hoisting frame, manufacturing supporting legs 3 of the hoisting frame, hoisting the supporting legs 3 of the hoisting frame into a hoisting machine room, respectively erecting two groups of supporting legs 3 at two sides of the end of a large shaft of a hoisting machine roller 4, fixing the supporting legs 3, and hanging an electric crane 2 for adjusting the position at the two supporting legs 3 of the hoisting frame; step three: the steel wire rope on the roller 4 is disassembled, the two cages are placed to the bottom of the well, the steel wire rope in the shaft is fixed with a head sheave table of a hoist, the remaining steel wire rope on the roller 4 is disassembled, a brake block of a brake disc is loosened, two sides of a large shaft of the roller 4 are fixedly connected with the crane 2, and accessories connected with a bearing bush are disassembled; step four: the bearing bush is replaced, and the large shaft of the roller 4 is placed at the bottom of the bearing bush; step five: grinding the bearing bush, namely grinding the bearing bush for multiple times, and fixedly installing the bearing bush in a bush seat; step six: trial run; step seven: and (5) winding a rope on the hoisting machine.

In the first step, the anchor pile pit 5 shown in fig. 3 is 15m away from the elevator machine room, the length of the anchor pile pit 5 is 1.5m, the width is 1m, and the depth is 1.5m, and after a steel wire rope of 6 multiplied by 19-phi 12.5mm is pre-buried in the anchor pile pit 5 to be used as a reserved rope, the anchor pile pit 5 is filled.

In the second step, the supporting legs 3 of the crane 2 shown in fig. 2 are composed of two groups of four seamless steel pipes with phi 150mm × 12m, two seamless steel pipes in each group are fixed in a crossed manner, one end of each seamless steel pipe is wound with a hemp rope, the length of the hemp rope winding is 0.8m, a steel wire rope with 6 × 19-phi 15.5mm is additionally arranged on the hemp rope for fixed winding, and each group of supporting legs 3 are wound for 30 circles to manufacture the supporting legs 3 with the height of 6m of the hoisting frame.

Fixing the supporting legs 3 in the step two, detaching the roof of the hoisting machine room, hoisting the supporting legs 3 of the hoisting frame from the roof by a 250KN automobile crane, and vertically arranging two groups of supporting legs 3 on two sides of the large shaft end of the hoisting machine roller 4 respectively; the supporting legs 3 of the two hoisting frames are tensioned by steel wire ropes of 6 multiplied by 19-phi 15.5mm, the steel wire ropes are fixedly hung on the stay ropes arranged in the anchor pile pit 5 and tensioned, a 32T electric crane for adjusting the position is hung at the two supporting legs 3 of the hoisting frames, and the lifting point of the 32T electric crane is positioned at the center of the tops of the bearing bushes.

In the third step, a gap of 5mm is arranged between the brake and a brake disc of the roller 4, wire rope buckles 1 with the diameter of 6 multiplied by 19-phi 28mm are hung on two sides of a large shaft of the roller 4, and the large shaft of the roller 4 is fixedly hung with a 32T electric crane through the wire rope buckles 1; and (5) removing the coupling of the large shaft of the roller 4 and the reducer of the hoister.

In the fourth step, the top cover of the bearing bush is opened, the large shaft of the roller 4 is lifted by 30mm, the top bush of the bearing bush is lifted, one end bush opening of the bottom bush of the bearing bush is supported by the arranged drill rod, the bottom bush is taken out through the other end bush opening, the shaft end of the large shaft of the roller 4 is coated with red lead, the bottom bush is placed in a bush seat, the large shaft of the 32T electric crane falls down, two bolts are arranged at the opposite corners of the top cover of the bearing bush for fastening, 5 circles of 6 multiplied by 19-phi 15.5mm steel wire rope winding are arranged on the auxiliary roller arranged on one side of the roller 4, and the auxiliary roller is pulled by a JD-25 small winch.

And fifthly, coating red on a shaft head of the bearing bush during first-time tile grinding, rotating a main shaft of the elevator by setting a JD-25 small winch, taking out a top tile and a bottom tile of the bearing bush, scraping off indentations on the top tile and the bottom tile by setting a scraper, slightly scraping the part with larger red coloring points of the bearing bush when a contact surface reaches 50%, not scraping positions with no or few coloring points on the red coloring points, scraping the top tile to form an oil groove capable of preventing the bearing bush, adjusting the gap of a tile opening of the top tile, placing a copper sheet for adjusting the thickness of the gap at a joint of the bearing bush, wherein the thickness of the copper sheet is 0.02mm, placing the bearing bush into a bush seat, covering the bearing bush through a bush cover, and fixing the bearing bush through setting a bolt.

Step six, after the bearing bush is installed, the accessories are installed and connected, the brake of the brake disc is adjusted, more preferably, the gap of the brake shoe is 2mm, when the test run is carried out, the lubricating oil pump is started firstly, the oil cup of the bearing bush is observed, after the lubricating oil in the oil cup reaches the bottom bearing bush, the test run is carried out at the speed of 2m/s, and the temperature of the bearing bush is detected after the test run is carried out for 10 minutes; if the temperature is not high, the vehicle is continuously driven, and the oiling condition of the oil cup and the temperature of the bearing bush are carefully observed in the driving process; when the temperature is continuously increased, stopping and opening the bearing bush for inspection; if the temperature is continuously low, the rope is required to be operated for a while, the rope can be wound and the maintenance record can be made after the normal operation, and the test operation time is one hour.

And seventhly, fixedly clamping an auxiliary hoisting machine in the hoisting machine room with a clamping plate on one side of a roller 4 through a steel wire rope, winding the steel wire rope of the auxiliary hoisting machine on the auxiliary roller through the roller 4 in a rotating mode, loosening a rope buckle 1 of the steel wire rope locked by the head sheave platform after the steel wire rope of the head sheave platform is tensioned, hanging an auxiliary tank, fixing the auxiliary tank on a tank supporting seat arranged at a well mouth, and opening a clutch of the hoisting machine and winding the rope on the main roller 4.

More preferably, the deviation of the elevation of the shaft axis of the main shaft of the hoister is 50mm, the deviation of the position of the hoisting center line of the hoister is 5mm, the verticality of the shaft axis of the main shaft of the hoister and the hoisting center line is one to five thousandths of zero, and a bearing beam of the hoister is in close contact with the bearing seat; the bearing bush is tightly attached to a bearing seat of the elevator, but the bearing bush can rotate when the bearing bush is tapped, the contact arc surface between the shaft neck of the elevator spindle and the middle part of the bottom bush is 100 degrees, and the gap between the shaft neck of the elevator spindle and the top of the bearing bush is 0.3 mm.

By adopting the technical scheme, the preparation work is sufficient in the process of replacing the bearing bush of the elevator, the pertinence of the overhaul content is strong, and the sudden failure of equipment in operation is effectively avoided; the bearing bush replacement is fully prepared, and corresponding materials and auxiliary equipment are prepared, so that some service facilities can be operated perfectly and smoothly, and the one-time replacement and transformation time is greatly saved.

The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.