CN108798666B - Underground maintenance-free travelling mechanism of low seam coal mining machine and underground maintenance method thereof - Google Patents
Underground maintenance-free travelling mechanism of low seam coal mining machine and underground maintenance method thereof Download PDFInfo
- Publication number
- CN108798666B CN108798666B CN201810914134.2A CN201810914134A CN108798666B CN 108798666 B CN108798666 B CN 108798666B CN 201810914134 A CN201810914134 A CN 201810914134A CN 108798666 B CN108798666 B CN 108798666B
- Authority
- CN
- China
- Prior art keywords
- mounting hole
- bearing
- maintenance
- bearing seat
- travelling mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 102
- 239000003245 coal Substances 0.000 title claims abstract description 91
- 238000005065 mining Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000012423 maintenance Methods 0.000 title claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 18
- 230000008439 repair process Effects 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000005299 abrasion Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 33
- 238000013461 design Methods 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 16
- 239000003550 marker Substances 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 210000004907 gland Anatomy 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004519 grease Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 241001669679 Eleotris Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/22—Propulsion of machines for slitting or completely freeing the mineral from the seam by wheels, endless tracks or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/08—Guiding the machine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
Abstract
The invention discloses a downhole maintenance-free travelling mechanism of a low seam mining machine and a downhole maintenance method, wherein the travelling mechanism comprises a shell, a large end plate, a guide sliding shoe, a spline shaft and a gear rail wheel; the method comprises the following steps: 1. collecting data; 2. judging whether the coal mining amount of the coal mining machine reaches the rated coal passing amount of the coal mining machine or whether the service time of the travelling mechanism reaches the service time threshold of the travelling mechanism; 3. the running of the standby running mechanism; 4. the whole running mechanism is removed and transported upwards; 5. removing old parts in the travelling mechanism; 6. precision measurement and error repair of a bearing seat mounting hole on the shell; 7. precision measurement and error repair of a bearing mounting hole on a large end plate; 8. measuring and repairing the abrasion loss of a guide surface of the guide sliding shoe; 9. and (5) assembling the walking mechanism. The invention reduces the abrasion of the shell and the spline shaft in the use process, effectively saves the maintenance time, and furthest reduces the underground maintenance until the state of underground maintenance-free is reached.
Description
Technical Field
The invention belongs to the technical field of coal mining machines, and particularly relates to a downhole maintenance-free travelling mechanism of a low seam coal mining machine and an on-well maintenance method thereof.
Background
Along with the acceleration of the overall mechanized, high-yield and high-efficiency mine construction of coal mine production in China, the design of a highly reliable and easily maintained coal mining machine becomes a technical key of the research of the coal mining machine manufacturing industry in recent years. The travelling mechanism is used as the two legs of the coal mining machine and is an important component of the coal mining machine, wherein the easily damaged part has large duty ratio, the underground maintenance occupation time is long, the labor intensity is high, and especially the underground maintenance work of a thin coal seam working face is difficult to develop due to the narrow space, so that the improvement of the overall reliability of the coal mining machine is seriously restricted, and the construction of a high-yield and high-efficiency mine is restricted.
The Chinese patent with the publication number of CN203130084U discloses a downhole maintenance-free running mechanism of a low seam shearer, which comprises a spline shaft, a shell, a guide sliding shoe, a gear rail wheel and a large end plate. The following disadvantages exist in this patent:
1. the bearing of the travelling wheel is directly arranged on the shell, the underground disassembly and assembly are difficult, and the whole shell needs to be repaired or even replaced after the bearing mounting hole on the shell is deformed;
2. The bearing needs to be filled with lubricating grease regularly, but the underground space is narrow, the operation is inconvenient, and the oil duct is easy to be blocked;
3. the gear rail wheel is connected with the spline shaft only through the spline, the radial positioning precision of the spline to the gear rail wheel is low, and the spline is easy to be impacted radially in the use process, so that the service life of the spline is influenced.
Meanwhile, the existing maintenance of the travelling mechanism of the coal mining machine generally adopts timely replacement of damaged parts in the travelling mechanism of the coal mining machine at irregular intervals in the pit, and due to the fact that the underground maintenance difficulty is high, the labor intensity of miners is high, and safety accidents are easy to occur. In addition, the design life of the key parts is not matched with the service life of the whole running mechanism, the maintenance standard is inconsistent, only the strength of a single piece is improved in the design and maintenance method, and the consideration of the whole reliability is lacking, so that small and medium faults in underground use are continuous and frequent maintenance is caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the underground maintenance-free running mechanism of the low seam coal mining machine, which has reasonable structural design and convenient installation and disassembly, and the first maintenance-free bearing and the second maintenance-free bearing do not need to be oiled for regular maintenance in the life cycle, can be stably used for more than one year, simultaneously have a self-aligning function, can bear larger centering errors, effectively reduce the abrasion of a shell and a spline shaft in the use process and prolong the service life of the spline due to the arrangement of the bearing seat and the radial positioning block.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a low seam coal mining machine is maintenance-free running gear in pit, includes casing, big end plate, direction skid shoe, spline shaft and tooth rail wheel, its characterized in that: the spline shaft is rotatably mounted on the shell through a first maintenance-free bearing, a bearing seat for the first maintenance-free bearing to be mounted is arranged on the shell, one end of the first maintenance-free bearing is provided with a sealing cover matched with the bearing seat, a first sealing ring is arranged between the sealing cover and the bearing seat and between the bearing seat and the spline shaft, the guide sliding shoe is sleeved on the spline shaft, the guide sliding shoe comprises a left lug plate and a right lug plate, the toothed rail wheel is arranged between the left lug plate and the right lug plate, the toothed rail wheel is in spline connection with the spline shaft, a radial positioning block for protecting the spline is arranged on the toothed rail wheel, the large end plate is rotatably mounted on the spline shaft through a second maintenance-free bearing sleeved on the spline shaft, a bushing for the second maintenance-free bearing to be mounted is sleeved on the spline shaft, a second sealing ring is arranged between the bushing and the large end plate, the large end plate is matched with the right lug plate, the large end plate is connected with the shell into a whole, and the second maintenance-free bearing is fixedly connected with the large end plate through pressing the large end plate.
The underground maintenance-free travelling mechanism of the low seam mining machine is characterized in that: the first sealing ring and the second sealing ring are both Gelai rings.
The underground maintenance-free travelling mechanism of the low seam mining machine is characterized in that: the shell is provided with a hydraulic tensioning device and a bolt which are connected with a traction part of the coal mining machine.
The underground maintenance-free travelling mechanism of the low seam mining machine is characterized in that: the radial positioning block and the toothed rail wheel are integrally machined, one end of the radial positioning block is lapped on the shaft shoulder of the spline shaft, and the other end of the radial positioning block is lapped on the bushing.
The underground maintenance-free travelling mechanism of the low seam mining machine is characterized in that: the left ear plate and the right ear plate are cast into a whole.
The invention also discloses an uphole maintenance method of the downhole maintenance-free running mechanism of the low seam mining machine, which is characterized in that: the maintenance method comprises the following steps:
step one, data acquisition: the coal mining machine is provided with a coal-passing amount acquisition module and a timer, the coal-passing amount acquisition module and the timer are connected with a main controller, the keyboard is used for setting the rated coal-passing amount of the coal mining machine, the keyboard is used for setting the service time threshold of the travelling mechanism, the coal-passing amount acquisition module is used for acquiring the coal-passing amount of the coal mining machine, the timer is used for measuring the service time of the travelling mechanism, and the coal-passing amount acquisition module and the timer are used for uploading output data to the main controller in real time;
Judging whether the coal mining amount of the coal mining machine reaches the rated coal exceeding amount of the coal mining machine or whether the service time of the travelling mechanism reaches the service time threshold value of the travelling mechanism or not: when the coal mining amount of the coal mining machine acquired by the coal amount acquisition module reaches a preset rated coal amount or the running mechanism use time measured by the timer reaches a preset use time threshold, the master controller prompts an operator to maintain the running mechanism through a prompter, and the third step is executed; otherwise, executing the first step;
step three, the following operation of a standby travelling mechanism: when an operator receives a prompt signal sent by the prompter, the operator transports the standby travelling mechanism from the well to the underground coal cutter working face;
step four, the whole running gear is dismantled and transported up: firstly, removing a hydraulic tensioning device through a random tool ultrahigh-pressure manual pump equipped with a coal cutter, and removing bolts through a spanner, wherein the travelling mechanism can be integrally removed from a traction part of the coal cutter; then, replacing the standby travelling mechanism transported to the working face of the coal mining machine in the third step, and installing the standby travelling mechanism on the traction part of the coal mining machine through a hydraulic tensioning device and bolts; finally, transporting the travelling mechanism to an uphole repair workshop;
Step five, removing old pieces in the travelling mechanism: lifting the travelling mechanism transported to the well repairing workshop in the fourth step by using a lifting appliance to enable the travelling mechanism to just stand, enabling the bottom surface of the guide sliding shoe to just stick to the ground, and then dismantling a second maintenance-free bearing, a toothed rail wheel and a first maintenance-free bearing inside the travelling mechanism in sequence, wherein the process is as follows:
step 501, dismantling a second maintenance-free bearing: firstly, the gland is detached from the large end plate, then the bushing and the second maintenance-free bearing are detached from the spline shaft together, and then the second maintenance-free bearing is detached from the bushing;
step 502, dismantling a gear rail wheel: firstly, lifting the travelling mechanism with the second maintenance-free bearing removed in the step 501 by a lifting appliance to enable the spline shaft to be vertically arranged, enabling the toothed rail wheel to be positioned above the first maintenance-free bearing, then sequentially lifting the large end plate and the guide sliding shoe away from the upper side by the lifting appliance, and finally timely removing the toothed rail wheel positioned between the left lug plate and the right lug plate after the toothed rail wheel is separated from the spline shaft;
step 503, dismantling the first maintenance-free bearing: firstly, lifting a spline shaft out of a shell body after the gear rail wheel is removed in step 502 by utilizing a lifting appliance, lifting the first maintenance-free bearing and the sealing cover together with the spline shaft, then uniformly tapping the sealing cover through a copper rod to remove the first maintenance-free bearing and the sealing cover together from the spline shaft, finally removing the first maintenance-free bearing from the sealing cover, and simultaneously removing the bearing seat from the shell body;
Step six, precision measurement and error repair of a bearing seat mounting hole on the shell are carried out, and the process is as follows:
step 601, measuring the precision of a bearing seat mounting hole: the shell is provided with a bearing seat mounting hole for mounting the bearing seat, the bearing seat mounting hole is a round hole, a first cylindrical gauge is mounted on the bearing seat mounting hole before the precision of the bearing seat mounting hole is measured, the diameter of the first cylindrical checking fixture is the same as the design size of the outer diameter of the bearing seat, then the center position of the bottom surface of the first cylindrical checking fixture is found by adopting a perpendicular bisector method, marks are made by a marker pen, and the center position of the bottom surface of the first cylindrical checking fixture is the center of the mounting hole of the bearing seat;
measuring the measured diameter D of the bearing seat mounting hole by using a micrometer with the center of the bottom surface of the first cylindrical gauge marked in the step 601 as the center of the bearing seat mounting hole, wherein the difference between the measured diameter D and the designed size of the bearing seat mounting hole is the size deviation of the bearing seat mounting hole, measuring the coaxiality error of the bearing seat mounting hole by using a micrometer with the center line of the outer circle of the shell as a reference axis, and executing a step 602 if the size deviation of the bearing seat mounting hole is not within the size tolerance range of the bearing seat mounting hole or the coaxiality error of the bearing seat mounting hole is not within the coaxiality tolerance range of the bearing seat mounting hole; otherwise, executing the step seven;
Step 602, error repair of bearing seat mounting holes: firstly, performing surfacing on the surface of a bearing seat mounting hole on a shell, and after surfacing is finished to remove welding stress, boring the bearing seat mounting hole by using a boring machine to ensure that the deviation of the size of the repaired bearing seat mounting hole is within the tolerance range of the size of the bearing seat mounting hole and the coaxiality error of the deviation is within the coaxiality tolerance range of the bearing seat mounting hole;
and seventhly, measuring the precision of the bearing mounting hole on the large end plate and repairing errors, wherein the process is as follows:
step 701, measuring the size precision of a bearing mounting hole: the bearing mounting hole is a round hole, a second cylindrical gauge is mounted on the bearing mounting hole before precision measurement is carried out on the bearing mounting hole, the diameter of the second cylindrical gauge is identical to the design size of the outer diameter of the second maintenance-free bearing, then the circle center position of the bottom surface of the second cylindrical gauge is found by adopting a perpendicular bisector method, marks are made by using a marker pen, and the circle center position of the bottom surface of the second cylindrical gauge is the center of the bearing mounting hole;
Measuring the measured diameter d of the bearing mounting hole by using a micrometer with the center of the bottom surface of the second cylindrical gauge marked in the step 701 as the center of the bearing mounting hole, wherein the difference between the measured diameter d and the designed size of the bearing mounting hole is the size deviation of the bearing mounting hole, measuring the coaxiality error of the bearing mounting hole by using a micrometer with the center line of the excircle of the large end plate as a reference axis, and executing a step 702 if the size deviation of the bearing mounting hole is not within the size tolerance range of the bearing mounting hole or the coaxiality error of the bearing mounting hole is not within the coaxiality tolerance range of the bearing mounting hole; otherwise, executing the step eight;
step 702, error repair of bearing mounting holes: firstly, performing overlaying welding on the surface of a bearing mounting hole on a large end plate, and after the overlaying welding is completed to remove welding stress, boring the bearing mounting hole by using a boring machine to ensure that the deviation of the size of the repaired bearing mounting hole is within the size tolerance range of the bearing mounting hole and the coaxiality error of the repaired bearing mounting hole is within the coaxiality tolerance range of the bearing mounting hole;
Step eight, measuring and repairing the abrasion loss of the guide surface of the guide sliding shoe, wherein the process is as follows:
step 801, measuring the abrasion loss of a guide surface of a guide sliding shoe: measuring the thickness of the wear-resistant layer of the guide surface of the guide sliding shoe detached in the step 502 by adopting a micrometer to obtain a measurement value H of the thickness of the wear-resistant layer of the guide surface of the guide sliding shoe; if the measured value H of the thickness of the wear layer of the guide surface of the guide shoe is not within the design range of the thickness of the wear layer of the guide surface of the guide shoe, repairing the guide surface of the guide shoe is required, and step 802 is executed; otherwise, executing the step nine;
step 802, repairing the guide surface of the guide shoe: the method comprises the steps of performing overlaying on a guide surface of a guide sliding shoe by adopting a wear-resistant welding rod, cleaning the guide surface of the guide sliding shoe before overlaying to prevent a welding layer from falling off, polishing the overlaid guide surface after overlaying, and polishing the guide surface to be smooth; the thickness of the polished guide surface wear-resistant layer of the guide sliding shoe is within the design range of the thickness of the guide surface wear-resistant layer of the guide sliding shoe;
step nine, assembling a travelling mechanism: and assembling the new first maintenance-free bearing, the gear rail wheel and the second maintenance-free bearing on the repaired shell through the spline shaft in sequence to complete the assembly of the running mechanism.
Compared with the prior art, the invention has the following advantages:
1. according to the travelling mechanism, the spline shaft is rotatably installed on the shell through the first maintenance-free bearing, and the large end plate is installed on the spline shaft through the second maintenance-free bearing, so that the first maintenance-free bearing and the second maintenance-free bearing do not need to be oiled for regular maintenance, the phenomenon that the bearings are blocked when lubricating grease is injected into the bearings is avoided, the service effect and the service life of the bearings are influenced, the labor intensity is reduced, and the working efficiency is improved.
2. According to the travelling mechanism, the bearing seat is arranged between the spline shaft and the shell to mount the first maintenance-free bearing, and the bushing is arranged between the second maintenance-free bearing and the spline shaft to mount the second maintenance-free bearing, so that the travelling mechanism is convenient to mount and dismount, and the abrasion of the shell and the spline shaft in the using process is avoided.
3. According to the travelling mechanism, the radial positioning blocks for protecting the spline are arranged on the gear rail wheel, so that the radial positioning precision of the gear rail wheel is improved, the possibility that the spline is subjected to radial impact is reduced, and the service life of the spline is prolonged.
4. The method has simple steps, avoids the maintenance work of the travelling mechanism of the coal mining machine in the pit to the greatest extent, reduces the labor intensity of workers, saves the maintenance time and provides powerful guarantee for improving the production efficiency.
5. Compared with the prior maintenance method which needs to replace damaged parts of the travelling mechanism of the coal mining machine underground irregularly, the method avoids the phenomenon of accelerated damage of parts caused by unmatched precision of new and old parts in the travelling mechanism of the coal mining machine, and effectively reduces the frequency of maintenance and disassembly by adopting the method for carrying out uphole maintenance by lifting the travelling mechanism of the coal mining machine in the rated coal passing amount or period.
6. The method avoids underground sudden equipment faults by adopting the periodical overhaul of the uphole predictability for the travelling mechanism of the coal mining machine, and is convenient for production organization and accessory supply.
In summary, the invention has reasonable structural design and convenient installation and disassembly, the first maintenance-free bearing and the second maintenance-free bearing do not need to be oiled for regular maintenance in the life cycle, can be used stably for more than one year, and simultaneously have a self-aligning function, can bear larger centering errors, and the arrangement of the bearing seat and the radial positioning block effectively reduces the abrasion of the shell and the spline shaft in the use process, thereby prolonging the service life of the spline; the phenomenon of accelerated damage of parts caused by unmatched precision of new and old parts among parts of the travelling mechanism is avoided, the frequency of maintenance and disassembly is effectively reduced, the maintenance time is saved, and the production efficiency is effectively improved.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is a schematic view of the external structure of a running gear employed in the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a cross-sectional view A-A of fig. 1.
Fig. 4 is a flow chart of the method of the present invention.
Reference numerals illustrate:
1-a shell; 2-large end plates; 3-1-left ear plate;
3-2-right ear plate; 4-a spline shaft; 5-a bushing;
6, capping; 7, sealing the cover; 8-bearing seats;
9-a toothed rail wheel; 9-1, a radial positioning block; 10-a pin;
11-a set screw; 12-a hydraulic tensioning device; 13-a bolt;
14-a first maintenance-free bearing; 15-a second maintenance-free bearing; 16-bond;
17-a first sealing ring; 18-a second sealing ring.
Detailed Description
As shown in fig. 1, 2 and 3, the invention comprises a shell 1, a big end plate 2, a guide sliding shoe, a spline shaft 4 and a toothed rail wheel 9, wherein the spline shaft 4 is rotatably arranged on the shell 1 through a first maintenance-free bearing 14, a bearing seat 8 for installing the first maintenance-free bearing 14 is arranged on the shell 1, one end of the first maintenance-free bearing 14 is provided with a sealing cover 7 matched with the bearing seat 8, a first sealing ring 17 is arranged between the sealing cover 7 and the bearing seat 8 and between the bearing seat 8 and the spline shaft 4, the guide sliding shoe is sleeved on the spline shaft 4, the guide sliding shoe comprises a left ear plate 3-1 and a right ear plate 3-2, the toothed rail wheel 9 is in spline connection with the spline shaft 4, a radial direction 9-1 for protecting the first maintenance-free bearing 14 is arranged on the toothed rail wheel 9, the big end plate 2 is fixedly connected with the big end plate 2 through a second bearing sleeve 15 sleeved on the spline shaft 4 and a second maintenance-free bearing 4, the guide sliding shoe is fixedly connected with the big end plate 2 through a second end plate 5 and the spline sleeve 2, and the guide sliding shoe is fixedly connected with the big end plate 2 through a second end plate 5 and the spline sleeve 2.
During actual use, the spline shaft 4 is rotatably installed on the shell 1 through the first maintenance-free bearing 14, and the large end plate 2 is installed on the spline shaft 4 through the second maintenance-free bearing 15, because the first maintenance-free bearing 14 and the second maintenance-free bearing 15 do not need to be oiled for regular maintenance in the life cycle, the bearing can be stably used for more than 1 year, the phenomenon that the bearing is blocked when lubricating grease is injected into the bearing is avoided, the using effect and the service life of the bearing are influenced, the labor intensity is reduced, and the working efficiency is improved. Meanwhile, the first maintenance-free bearing 14 and the second maintenance-free bearing 15 also have self-adjusting functions, can bear larger centering errors, can bear larger radial loads and can bear a certain amount of axial loads, and well-matched complex working conditions.
It should be noted that, through setting up bearing frame 8 between spline shaft 4 and casing 1 and installing first maintenance-free bearing 14, set up bush 5 between second maintenance-free bearing 15 and spline shaft 4 and install second maintenance-free bearing 15, the installation is convenient with the dismantlement, has avoided the wearing and tearing of casing 1 and spline shaft 4 in the use.
The bearing seat 8 is fixedly connected with the shell 1 through a set screw 11, and the sealing cover 7 is clamped on the spline shaft 4 through a key 16. By providing the key 16 between the seal cover 7 and the spline shaft 4, the seal cover 7 and the spline shaft 4 can be rotated synchronously.
By arranging the bushing 5 for the second maintenance-free bearing 15 on the spline shaft 4, on one hand, the bushing 5 acts as a bearing seat for the second maintenance-free bearing 15, so that the second maintenance-free bearing 15 is prevented from being worn; on the other hand, the bushing 5 provides radial positioning for the toothed wheel 9, so that one end of the radial positioning block 9-1 is overlapped on the bushing 5.
The large end plate 2 and the shell 1 are connected into a whole through a locating pin and a bolt, so that the subsequent disassembly and maintenance are facilitated.
In actual use, the shell 1 adopts the new profile ZG32CrF for thermal refining, and compared with the material obtained by the conventional normalizing and annealing treatment, the microstructure is more compact, so that the shell 1 has higher strength and higher wear resistance.
In this embodiment, the first sealing ring 17 and the second sealing ring 18 are gray rings.
In actual use, the gray rings are adopted to seal between the bearing seat 8 and the spline shaft 4 and between the bushing 5 and the large end plate 2, so that not only can entry of solid dust be prevented, but also the occupied space is small, and the structure is compact.
As shown in fig. 1 and 2, in the present embodiment, the housing 1 is provided with a hydraulic tightening device 12 and a bolt 13 connected to a traction portion of the shearer.
In this embodiment, the radial positioning block 9-1 and the toothed wheel 9 are integrally manufactured, one end of the radial positioning block 9-1 is lapped on the shaft shoulder of the spline shaft 4, and the other end of the radial positioning block 9-1 is lapped on the bushing 5.
During actual use, one end of the radial positioning block 9-1 is lapped on the shaft shoulder of the spline shaft 4, and the other end of the radial positioning block is lapped on the bushing 5, so that the toothed rail wheel 9 can be effectively radially positioned, the radial positioning precision of the toothed rail wheel 9 is increased, and the possibility that the spline is impacted can be reduced due to the fact that the two ends of the radial positioning block 9-1 are stressed, and the service life of the spline is prolonged.
During actual use, the bushing 5 is fixed on the spline shaft 4 through the pin 10, so that the second maintenance-free bearing 15 is convenient to install and detach, and the bushing 5 and the second maintenance-free bearing 15 can be detached together simultaneously when later disassembly is needed.
In this embodiment, the left ear plate 3-1 and the right ear plate 3-2 are cast as one body.
By casting the left and right ear plates 3-1 and 3-2 as one body, i.e. by taking the guide shoe as one body, the strength of the guide shoe is significantly improved compared with the prior split type structure.
An uphole maintenance method of a downhole maintenance-free running mechanism of a low seam shearer as shown in fig. 4, the maintenance method comprising the following steps:
step one, data acquisition: the coal mining machine is provided with a coal-passing amount acquisition module and a timer, the coal-passing amount acquisition module and the timer are connected with a main controller, the keyboard is used for setting the rated coal-passing amount of the coal mining machine, the keyboard is used for setting the service time threshold of the travelling mechanism, the coal-passing amount acquisition module is used for acquiring the coal-passing amount of the coal mining machine, the timer is used for measuring the service time of the travelling mechanism, and the coal-passing amount acquisition module and the timer are used for uploading output data to the main controller in real time;
when the coal mining machine using the travelling mechanism is used for one year or the coal mining amount of the coal mining machine using the travelling mechanism reaches the rated coal passing amount of the travelling mechanism, the travelling mechanism needs to be integrally maintained.
In actual use, the main controller is a controller of the coal mining machine, a counter is connected to the controller of the coal mining machine, and the number of times of pushing the coal mining machine counted by the counter is countedCutting depth of shearer drum >At the same time, the average thickness of the coal seam is set>Length of working face->And coal Density->The coal passing amount of the coal mining machine can be obtained through calculation。
Judging whether the coal mining amount of the coal mining machine reaches the rated coal exceeding amount of the coal mining machine or whether the service time of the travelling mechanism reaches the service time threshold value of the travelling mechanism or not: when the coal mining amount of the coal mining machine acquired by the coal amount acquisition module reaches a preset rated coal amount or the running mechanism use time measured by the timer reaches a preset use time threshold, the master controller prompts an operator to maintain the running mechanism through a prompter, and the third step is executed; otherwise, executing the first step;
when the coal mining machine coal mining amount acquired by the coal exceeding amount acquisition module reaches a preset rated coal exceeding amount or the running mechanism service time measured by the timer reaches a preset service time threshold, the main controller can prompt an operator to maintain the running mechanism by popping up a notification interface on a main display screen of the coal mining machine or a display screen of a ground control dispatching room, and also can prompt the operator to maintain the running mechanism by setting an audible and visual alarm connected with the main controller.
Step three, the following operation of a standby travelling mechanism: when an operator receives a prompt signal sent by the prompter, the operator transports the standby travelling mechanism from the well to the underground coal cutter working face;
step four, the whole running gear is dismantled and transported up: firstly, the hydraulic tensioning device 12 is removed through a random tool ultrahigh pressure manual pump equipped with the coal mining machine, and after bolts 13 are removed through a spanner, the travelling mechanism can be integrally detached from a traction part of the coal mining machine; then, replacing the standby travelling mechanism transported to the working face of the coal mining machine in the third step, and installing the standby travelling mechanism on the traction part of the coal mining machine through a hydraulic tensioning device 12 and a bolt 13; finally, transporting the travelling mechanism to an uphole repair workshop;
it should be noted that, 4M 30 lifting holes are formed in the top of the shell 1, so that the running mechanism can be conveniently detached and transported.
Step five, removing old pieces in the travelling mechanism: lifting the travelling mechanism transported to the well repairing workshop in the fourth step by using a lifting appliance to enable the travelling mechanism to just stand up, enabling the bottom surface of the guide sliding shoe to just stick to the ground, and then dismantling the second maintenance-free bearing 15, the toothed rail wheel 9 and the first maintenance-free bearing 14 inside the travelling mechanism in sequence, wherein the process is as follows:
Step 501, dismantling a second maintenance-free bearing: firstly, the gland 6 is detached from the large end plate 2, then the bushing 5 and the second maintenance-free bearing 15 are detached from the spline shaft 4 together, and then the second maintenance-free bearing 15 is detached from the bushing 5;
when the second maintenance-free bearing 15 in step 501 is removed, the bushing 5 and the second maintenance-free bearing 15 can be ejected from the spline shaft 4 together by screwing a jackscrew matched with the bushing 5 into the jackscrew hole, then the outer ring of the second maintenance-free bearing 15 is supported by a cushion block, the height of the cushion block is greater than 10cm, and the bushing 5 and the second maintenance-free bearing 15 can be separated by knocking the bushing 5 by using a copper rod. And the points of the contact surface of the lining 5 and the inner ring of the second maintenance-free bearing 15 are uniformly stressed when the lining is knocked, and the lining cannot be knocked or overstretched at a certain place.
Step 502, dismantling a gear rail wheel: firstly, lifting a travelling mechanism with the second maintenance-free bearing 15 removed in the step 501 by a lifting appliance to enable the spline shaft 4 to be vertically arranged, enabling the toothed rail wheel 9 to be positioned above the first maintenance-free bearing 14, then sequentially lifting the large end plate 2 and the guide sliding shoes from the upper side by the lifting appliance, and finally timely removing the toothed rail wheel 9 positioned between the left ear plate 3-1 and the right ear plate 3-2 after the toothed rail wheel 9 is separated from the spline shaft 4;
In step 502, after the travelling mechanism is lifted by a lifting tool and the spline shaft 4 is vertically arranged, a sleeper should be added under the housing 1, and the height of the sleeper should be greater than the height of the spline shaft 4 protruding below the housing 1.
Two locating pins are arranged between the large end plate 2 and the shell 1, when the rack wheel 9 in the step 502 is dismounted, the 2 locating pins for fixing the large end plate 2 and the shell 1 are firstly required to be pulled out by using a randomly equipped throwing hammer, then bolts for connecting the large end plate 2 and the shell 1 are dismounted by using a spanner, and then the large end plate 2 is lifted from the upper part by using a lifting appliance.
Step 503, dismantling the first maintenance-free bearing: firstly, lifting the spline shaft 4 from the shell 1 after the gear rail wheel 9 is removed in step 502 by utilizing a lifting appliance, lifting the first maintenance-free bearing 14 and the sealing cover 7 along with the spline shaft 4, then uniformly tapping the sealing cover 7 through a copper rod to detach the first maintenance-free bearing 14 and the sealing cover 7 from the spline shaft 4, finally detaching the first maintenance-free bearing 14 from the sealing cover 7, and simultaneously detaching the bearing seat 8 from the shell 1;
when the bearing seat 8 in step 503 is disassembled, the fixing screw 11 is first disassembled by a wrench, and then the bearing seat 8 is ejected out by a jackscrew on a flange of the bearing seat 8. If the mounting hole of the bearing seat 8 is found to be deformed and cannot be ejected, a cushion block can be added at the position of the mounting hole of the spline shaft 4 in the shell 1, and then the bearing seat 8 is detached from the shell 1 by knocking the bearing seat 8.
Step six, precision measurement and error repair of a bearing seat mounting hole on the shell are carried out, and the process is as follows:
step 601, measuring the precision of a bearing seat mounting hole: the shell 1 is provided with a bearing seat mounting hole for mounting the bearing seat 8, the bearing seat mounting hole is a round hole, a first cylindrical gauge is mounted on the bearing seat mounting hole before measuring the precision of the bearing seat mounting hole, the diameter of the first cylindrical gauge is identical to the design size of the outer diameter of the bearing seat 8, then a perpendicular bisector method is adopted to find the circle center position of the bottom surface of the first cylindrical gauge, a marker pen is used for marking, and the circle center position of the bottom surface of the first cylindrical gauge is the center of the bearing seat mounting hole;
measuring the measured diameter D of the bearing seat mounting hole by using a micrometer with the center of the bottom surface of the first cylindrical gauge marked in the step 601 as the center of the bearing seat mounting hole, wherein the difference between the measured diameter D and the designed size of the bearing seat mounting hole is the size deviation of the bearing seat mounting hole, measuring the coaxiality error of the bearing seat mounting hole by using a micrometer with the center line of the outer circle of the shell 1 as a reference axis, and executing a step 602 if the size deviation of the bearing seat mounting hole is not within the size tolerance range of the bearing seat mounting hole or the coaxiality error of the bearing seat mounting hole is not within the coaxiality tolerance range of the bearing seat mounting hole; otherwise, executing the step seven;
When the micrometer is used to measure the measured diameter D of the bearing seat mounting hole, the circle center of the bottom surface of the first cylindrical gauge marked in step 601 is used as the center of the bearing seat mounting hole to perform multiple measurements.
Step 602, error repair of bearing seat mounting holes: firstly, performing surfacing on the surface of a bearing seat mounting hole on a shell 1, and after surfacing is finished to remove welding stress, boring the bearing seat mounting hole by using a boring machine to ensure that the deviation of the size of the repaired bearing seat mounting hole is within the tolerance range of the size of the bearing seat mounting hole and the coaxiality error of the repaired bearing seat mounting hole is within the coaxiality tolerance range of the bearing seat mounting hole;
when in actual use, the coaxiality tolerance of the repaired bearing seat mounting hole is ensured to be not more than phi 0.025mm;
and seventhly, measuring the precision of the bearing mounting hole on the large end plate and repairing errors, wherein the process is as follows:
step 701, measuring the size precision of a bearing mounting hole: the large end plate 2 is provided with a bearing mounting hole for mounting a second maintenance-free bearing 15, the bearing mounting hole is a round hole, a second cylindrical gauge is mounted on the bearing mounting hole before precision measurement is carried out on the bearing mounting hole, the diameter of the second cylindrical gauge is identical to the design size of the outer diameter of the second maintenance-free bearing 15, then the center position of the bottom surface of the second cylindrical gauge is found by adopting a perpendicular bisector method, a marker pen is used for marking, and the center position of the bottom surface of the second cylindrical gauge is the center of the bearing mounting hole;
Measuring the measured diameter d of the bearing mounting hole by using a micrometer with the center of the bottom surface of the second cylindrical gauge marked in the step 701 as the center of the bearing mounting hole, wherein the difference between the measured diameter d and the designed size of the bearing mounting hole is the size deviation of the bearing mounting hole, measuring the coaxiality error of the bearing mounting hole by using a micrometer with the center line of the outer circle of the large end plate 2 as a reference axis, and executing a step 702 if the size deviation of the bearing mounting hole is not within the size tolerance range of the bearing mounting hole or the coaxiality error of the bearing mounting hole is not within the coaxiality tolerance range of the bearing mounting hole; otherwise, executing the step eight;
when the micrometer is used to measure the measured diameter d of the bearing mounting hole, the circle center of the bottom surface of the second cylindrical gauge marked in step 701 is used as the center of the bearing mounting hole to perform multiple measurements.
Step 702, error repair of bearing mounting holes: firstly, performing overlaying welding on the surface of a bearing mounting hole on a large end plate 2, and after the overlaying welding is completed to remove welding stress, boring the bearing mounting hole by using a boring machine to ensure that the deviation of the size of the repaired bearing mounting hole is within the tolerance range of the size of the bearing mounting hole and the coaxiality error of the repaired bearing mounting hole is within the coaxiality tolerance range of the bearing mounting hole;
Step eight, measuring and repairing the abrasion loss of the guide surface of the guide sliding shoe, wherein the process is as follows:
step 801, measuring the abrasion loss of a guide surface of a guide sliding shoe: measuring the thickness of the wear-resistant layer of the guide surface of the guide sliding shoe detached in the step 502 by adopting a micrometer to obtain a measurement value H of the thickness of the wear-resistant layer of the guide surface of the guide sliding shoe; if the measured value H of the thickness of the wear layer of the guide surface of the guide shoe is not within the design range of the thickness of the wear layer of the guide surface of the guide shoe, repairing the guide surface of the guide shoe is required, and step 802 is executed; otherwise, executing the step nine;
when the guide shoe is actually used, the depth of the effective wear-resistant layer of the guide surface of the standard guide shoe is 6mm, and if the thickness measured value H of the wear-resistant layer of the guide surface of the guide shoe is smaller than 6mm, the wear-resistant layer of the guide surface of the guide shoe needs to be repaired.
Step 802, repairing the guide surface of the guide shoe: the method comprises the steps of performing overlaying on a guide surface of a guide sliding shoe by adopting a wear-resistant welding rod, cleaning the guide surface of the guide sliding shoe before overlaying to prevent a welding layer from falling off, polishing the overlaid guide surface after overlaying, and polishing the guide surface to be smooth; the thickness of the polished guide surface wear-resistant layer of the guide sliding shoe is within the design range of the thickness of the guide surface wear-resistant layer of the guide sliding shoe;
When in actual use, when the bearing seat mounting holes on the shell 1, the bearing mounting holes on the large end plate 2 and the guide sliding shoes are measured, the shell 1, the large end plate 2 and the guide sliding shoes are firstly subjected to appearance inspection and ultrasonic flaw detection, and if obvious damage exists, new parts are replaced.
It should be noted that, if the on-site condition cannot repair the bearing seat mounting hole on the housing 1, the bearing mounting hole on the large end plate 2 and the guide shoe, the housing 1, the large end plate 2 and the guide shoe may be replaced first, and then the housing 1, the large end plate 2 and the guide shoe to be repaired are repaired in batches by a professional manufacturer.
Step nine, assembling a travelling mechanism: and assembling a new first maintenance-free bearing 14, the toothed rail wheel 9 and a second maintenance-free bearing 15 on the repaired shell 1 through the spline shaft 4 in sequence to complete the assembly of the running mechanism.
When the travelling mechanism is assembled, the new parts are assembled according to the reverse order of the disassembly order of the old parts of the travelling mechanism in the fifth step, wherein the sealing parts and the damaged connecting parts are required to be replaced in the assembling process.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (5)
1. The underground maintenance-free running mechanism of the low seam mining machine comprises a shell (1), a large end plate (2), a guide sliding shoe, a spline shaft (4) and a toothed rail wheel (9), and is characterized in that: the spline shaft (4) is rotatably arranged on the shell (1) through a first maintenance-free bearing (14), a bearing seat (8) for the first maintenance-free bearing (14) to be arranged on the shell (1), one end of the first maintenance-free bearing (14) is provided with a sealing cover (7) matched with the bearing seat (8), a first sealing ring (17) is arranged between the sealing cover (7) and the bearing seat (8) and between the bearing seat (8) and the spline shaft (4), the guide sliding shoe is sleeved on the spline shaft (4), the guide sliding shoe comprises a left ear plate (3-1) and a right ear plate (3-2), a toothed rail wheel (9) is arranged between the left ear plate (3-1) and the right ear plate (3-2), the toothed rail wheel (9) is in spline connection with the spline shaft (4), a radial positioning block (9-1) for protecting the spline is arranged on the toothed rail wheel (9), the large end plate (2) is sleeved on the second bearing (4) through the spline shaft (4) and is provided with a second spline sleeve (15) which is arranged on the spline shaft (5), the large end plate (2) is matched with the right ear plate (3-2), the large end plate (2) is connected with the shell (1) into a whole, and the second maintenance-free bearing (15) is tightly pressed on the large end plate (2) through a gland (6) fixedly connected with the large end plate (2);
The method comprises the following steps:
step one, data acquisition: the coal mining machine is provided with a coal-passing amount acquisition module and a timer, the coal-passing amount acquisition module and the timer are connected with a main controller, the keyboard is used for setting the rated coal-passing amount of the coal mining machine, the keyboard is used for setting the service time threshold of the travelling mechanism, the coal-passing amount acquisition module is used for acquiring the coal-passing amount of the coal mining machine, the timer is used for measuring the service time of the travelling mechanism, and the coal-passing amount acquisition module and the timer are used for uploading output data to the main controller in real time;
judging whether the coal mining amount of the coal mining machine reaches the rated coal exceeding amount of the coal mining machine or whether the service time of the travelling mechanism reaches the service time threshold value of the travelling mechanism or not: when the coal mining amount of the coal mining machine acquired by the coal amount acquisition module reaches a preset rated coal amount or the running mechanism use time measured by the timer reaches a preset use time threshold, the master controller prompts an operator to maintain the running mechanism through a prompter, and the third step is executed; otherwise, executing the first step;
step three, the following operation of a standby travelling mechanism: when an operator receives a prompt signal sent by the prompter, the operator transports the standby travelling mechanism from the well to the underground coal cutter working face;
Step four, the whole running gear is dismantled and transported up: firstly, removing a hydraulic tensioning device (12) through a random tool ultrahigh-pressure manual pump equipped with the coal mining machine, and removing a bolt (13) through a spanner, wherein the travelling mechanism can be integrally removed from a traction part of the coal mining machine; then, replacing the standby travelling mechanism transported to the working face of the coal mining machine in the step three, and installing the standby travelling mechanism on the traction part of the coal mining machine through a hydraulic tensioning device (12) and a bolt (13); finally, transporting the travelling mechanism to an uphole repair workshop;
step five, removing old pieces in the travelling mechanism: lifting the travelling mechanism transported to the well repairing workshop in the fourth step by using a lifting appliance to enable the travelling mechanism to just stand, enabling the bottom surface of the guide sliding shoe to just stick to the ground, and then dismantling a second maintenance-free bearing (15), a toothed rail wheel (9) and a first maintenance-free bearing (14) inside the travelling mechanism in sequence, wherein the process is as follows:
step 501, dismantling a second maintenance-free bearing: firstly, the gland (6) is detached from the large end plate (2), then the bushing (5) and the second maintenance-free bearing (15) are detached from the spline shaft (4) together, and then the second maintenance-free bearing (15) is detached from the bushing (5);
Step 502, dismantling a gear rail wheel: firstly, lifting a travelling mechanism with a second maintenance-free bearing (15) removed in the step 501 by a lifting appliance to enable a spline shaft (4) to be vertically arranged, enabling a toothed rail wheel (9) to be positioned above a first maintenance-free bearing (14), then sequentially lifting a large end plate (2) and the guide sliding shoes from the upper part by the lifting appliance, and finally timely removing the toothed rail wheel (9) positioned between a left ear plate (3-1) and a right ear plate (3-2) after the toothed rail wheel (9) is separated from the spline shaft (4);
step 503, dismantling the first maintenance-free bearing: firstly, lifting a spline shaft (4) out of a shell (1) after a gear rail wheel (9) is removed in step 502 by utilizing a lifting appliance, lifting a first maintenance-free bearing (14) and a sealing cover (7) together with the spline shaft (4), then uniformly tapping the sealing cover (7) through a copper bar to detach the first maintenance-free bearing (14) and the sealing cover (7) together from the spline shaft (4), and finally detaching the first maintenance-free bearing (14) from the sealing cover (7), and simultaneously detaching a bearing seat (8) from the shell (1);
step six, precision measurement and error repair of a bearing seat mounting hole on the shell are carried out, and the process is as follows:
Step 601, measuring the precision of a bearing seat mounting hole: the method comprises the steps that a bearing seat mounting hole for mounting a bearing seat (8) is formed in a shell (1), the bearing seat mounting hole is a round hole, a first cylindrical gauge is mounted on the bearing seat mounting hole before the accuracy of the bearing seat mounting hole is measured, the diameter of the first cylindrical gauge is identical to the design size of the outer diameter of the bearing seat (8), then the circle center position of the bottom surface of the first cylindrical gauge is found by adopting a perpendicular bisector method, a marker pen is used for marking, and the circle center position of the bottom surface of the first cylindrical gauge is the center of the bearing seat mounting hole;
measuring the measured diameter D of the bearing seat mounting hole by using a micrometer with the center of the bottom surface of the first cylindrical gauge marked in the step 601 as the center of the bearing seat mounting hole, wherein the difference between the measured diameter D and the designed size of the bearing seat mounting hole is the size deviation of the bearing seat mounting hole, measuring the coaxiality error of the bearing seat mounting hole by using a micrometer with the center line of the outer circle of the shell (1) as a reference axis, and executing the step 602 if the size deviation of the bearing seat mounting hole is not within the size tolerance range of the bearing seat mounting hole or the coaxiality error of the bearing seat mounting hole is not within the coaxiality tolerance range of the bearing seat mounting hole; otherwise, executing the step seven;
Step 602, error repair of bearing seat mounting holes: firstly, surfacing is carried out on the surface of a bearing seat mounting hole on a shell (1), after surfacing is finished to remove welding stress, boring is carried out on the bearing seat mounting hole by adopting a boring machine, so that the deviation of the size of the repaired bearing seat mounting hole is within the tolerance range of the size of the bearing seat mounting hole and the coaxiality error of the deviation is within the coaxiality tolerance range of the bearing seat mounting hole;
and seventhly, measuring the precision of the bearing mounting hole on the large end plate and repairing errors, wherein the process is as follows:
step 701, measuring the size precision of a bearing mounting hole: the large end plate (2) is provided with a bearing mounting hole for mounting a second maintenance-free bearing (15), the bearing mounting hole is a round hole, a second cylindrical gauge is mounted on the bearing mounting hole before precision measurement is carried out on the bearing mounting hole, the diameter of the second cylindrical gauge is identical to the design size of the outer diameter of the second maintenance-free bearing (15), then the center position of the bottom surface of the second cylindrical gauge is found by adopting a perpendicular bisector method, a marker pen is used for marking, and the center position of the bottom surface of the second cylindrical gauge is the center of the bearing mounting hole;
Measuring the measured diameter d of the bearing mounting hole by using a micrometer with the center of the bottom surface of the second cylindrical gauge marked in the step 701 as the center of the bearing mounting hole, wherein the difference between the measured diameter d and the designed size of the bearing mounting hole is the size deviation of the bearing mounting hole, measuring the coaxiality error of the bearing mounting hole by using a micrometer with the center line of the outer circle of the large end plate (2) as a reference axis, and performing error repair on the bearing mounting hole if the size deviation of the bearing mounting hole is not within the size tolerance range of the bearing mounting hole or the coaxiality error of the bearing mounting hole is not within the coaxiality tolerance range of the bearing mounting hole, so as to execute the step 702; otherwise, executing the step eight;
step 702, error repair of bearing mounting holes: firstly, overlaying the surface of the bearing mounting hole on the large end plate (2), and boring the bearing mounting hole by using a boring machine after the overlaying is finished to remove welding stress, so that the deviation of the size of the repaired bearing mounting hole is within the tolerance range of the size of the bearing mounting hole and the coaxiality error of the repaired bearing mounting hole is within the coaxiality tolerance range of the bearing mounting hole;
Step eight, measuring and repairing the abrasion loss of the guide surface of the guide sliding shoe, wherein the process is as follows:
step 801, measuring the abrasion loss of a guide surface of a guide sliding shoe: measuring the thickness of the wear-resistant layer of the guide surface of the guide sliding shoe detached in the step 502 by adopting a micrometer to obtain a measurement value H of the thickness of the wear-resistant layer of the guide surface of the guide sliding shoe; if the measured value H of the thickness of the wear layer of the guide surface of the guide shoe is not within the design range of the thickness of the wear layer of the guide surface of the guide shoe, repairing the guide surface of the guide shoe is required, and step 802 is executed; otherwise, executing the step nine;
step 802, repairing the guide surface of the guide shoe: the method comprises the steps of performing overlaying on a guide surface of a guide sliding shoe by adopting a wear-resistant welding rod, cleaning the guide surface of the guide sliding shoe before overlaying to prevent a welding layer from falling off, polishing the overlaid guide surface after overlaying, and polishing the guide surface to be smooth; the thickness of the polished guide surface wear-resistant layer of the guide sliding shoe is within the design range of the thickness of the guide surface wear-resistant layer of the guide sliding shoe;
step nine, assembling a travelling mechanism: and assembling the new first maintenance-free bearing (14), the toothed rail wheel (9) and the second maintenance-free bearing (15) on the repaired shell (1) through the spline shaft (4) in sequence to complete the assembly of the running mechanism.
2. An uphole maintenance method of a downhole maintenance-free running gear of a low seam mining machine as claimed in claim 1, wherein: the first sealing ring (17) and the second sealing ring (18) are both Gelai rings.
3. An uphole maintenance method of a downhole maintenance-free running gear of a low seam mining machine as claimed in claim 1, wherein: the shell (1) is provided with a hydraulic tensioning device (12) and a bolt (13) which are connected with a traction part of the coal mining machine.
4. An uphole maintenance method of a downhole maintenance-free running gear of a low seam mining machine as claimed in claim 1, wherein: the radial positioning block (9-1) and the toothed rail wheel (9) are integrally machined, one end of the radial positioning block (9-1) is lapped on the shaft shoulder of the spline shaft (4), and the other end of the radial positioning block (9-1) is lapped on the bushing (5).
5. An uphole maintenance method of a downhole maintenance-free running gear of a low seam mining machine as claimed in claim 1, wherein: the left ear plate (3-1) and the right ear plate (3-2) are cast into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914134.2A CN108798666B (en) | 2018-08-13 | 2018-08-13 | Underground maintenance-free travelling mechanism of low seam coal mining machine and underground maintenance method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914134.2A CN108798666B (en) | 2018-08-13 | 2018-08-13 | Underground maintenance-free travelling mechanism of low seam coal mining machine and underground maintenance method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108798666A CN108798666A (en) | 2018-11-13 |
| CN108798666B true CN108798666B (en) | 2024-03-15 |
Family
ID=64079931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810914134.2A Active CN108798666B (en) | 2018-08-13 | 2018-08-13 | Underground maintenance-free travelling mechanism of low seam coal mining machine and underground maintenance method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108798666B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111196253A (en) * | 2020-02-28 | 2020-05-26 | 神华天津煤炭码头有限责任公司 | Maintenance method of mechanical walking device |
| CN111550202B (en) * | 2020-06-17 | 2022-03-25 | 焦作煤业（集团）有限责任公司 | Crawler-type coal water-gas separation and metering conveying device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201934098U (en) * | 2011-03-01 | 2011-08-17 | 安徽山河矿业装备股份有限公司 | Walking box structure of coal mining machine |
| CN203130084U (en) * | 2013-03-23 | 2013-08-14 | 西安煤矿机械有限公司 | Running mechanism of thin seam coal shearer |
| CN203879498U (en) * | 2014-04-29 | 2014-10-15 | 三一重型装备有限公司 | Guide slipping boot, walking part of coal mining machine and coal mining machine |
| CN104564059A (en) * | 2015-02-05 | 2015-04-29 | 天地上海采掘装备科技有限公司 | Reversely-fastening type traveling device of coal mining machine for thin coal seams |
| CN105134208A (en) * | 2015-07-09 | 2015-12-09 | 三一重型装备有限公司 | Travel wheel overload protection apparatus, travelling mechanism and coal cutter |
| CN205578531U (en) * | 2016-04-21 | 2016-09-14 | 西安煤矿机械有限公司 | Use cogged rail wheelset of non -maintaining bearing |
| CN208816117U (en) * | 2018-08-13 | 2019-05-03 | 西安煤矿机械有限公司 | A kind of non-maintaining walking mechanism in low seam mining machinery underground |
-
2018
- 2018-08-13 CN CN201810914134.2A patent/CN108798666B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201934098U (en) * | 2011-03-01 | 2011-08-17 | 安徽山河矿业装备股份有限公司 | Walking box structure of coal mining machine |
| CN203130084U (en) * | 2013-03-23 | 2013-08-14 | 西安煤矿机械有限公司 | Running mechanism of thin seam coal shearer |
| CN203879498U (en) * | 2014-04-29 | 2014-10-15 | 三一重型装备有限公司 | Guide slipping boot, walking part of coal mining machine and coal mining machine |
| CN104564059A (en) * | 2015-02-05 | 2015-04-29 | 天地上海采掘装备科技有限公司 | Reversely-fastening type traveling device of coal mining machine for thin coal seams |
| CN105134208A (en) * | 2015-07-09 | 2015-12-09 | 三一重型装备有限公司 | Travel wheel overload protection apparatus, travelling mechanism and coal cutter |
| CN205578531U (en) * | 2016-04-21 | 2016-09-14 | 西安煤矿机械有限公司 | Use cogged rail wheelset of non -maintaining bearing |
| CN208816117U (en) * | 2018-08-13 | 2019-05-03 | 西安煤矿机械有限公司 | A kind of non-maintaining walking mechanism in low seam mining machinery underground |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108798666A (en) | 2018-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108798666B (en) | Underground maintenance-free travelling mechanism of low seam coal mining machine and underground maintenance method thereof | |
| CN204724246U (en) | 2PCF-2022 single segment hammer type crusher rotor | |
| CN110238791B (en) | Main bearing disassembling method and main bearing maintenance method of main drive of shield machine | |
| CN108787755B (en) | A kind of on-bne repair method of seamless steel pipe cold-rolling mill feeding adjustment device | |
| CN210147986U (en) | Special dismounting device of bearing | |
| CN210878451U (en) | Disassembly and assembly tool for overhauling large hydraulic dynamometer | |
| CN109539289B (en) | Method for repairing boiler grate | |
| CN209579415U (en) | A kind of single disassembly bearing puller | |
| CN206598069U (en) | A kind of sensor replacing device for edger roll oil cylinder | |
| CN201254687Y (en) | Knife holder quick changing system for milling and planning rotor | |
| CN112607587A (en) | Lifting appliance for dismounting and mounting vertical mill roller sleeve | |
| CN205572318U (en) | Decomposition instrument is changed to belt pulley bearing | |
| CN219293864U (en) | Frock is dismantled to bearing | |
| CN201863050U (en) | Tool setting device for omega type seal welding seam cutter of control rod drive mechanism | |
| CN113819146B (en) | Sliding bearing seat for tower mill | |
| CN112756042B (en) | Fixing method for crossbeam bushing of single-cylinder hydraulic cone crusher | |
| CN210968722U (en) | Special maintenance platform for steel wire rope carrier roller | |
| CN112551407A (en) | Structural design and replacement method of split slotted rope groove plate | |
| CN104863968B (en) | Bearing bush oil retainer ring of steam turbine set | |
| CN218946863U (en) | Large-scale equipment bearing fixing cap mounting and dismounting device | |
| CN110918941A (en) | Worn-out bearing position repairing device | |
| CN219562934U (en) | Frock special for disassembling screw sleeve of expansion dryer | |
| CN220373182U (en) | Helium pressure detecting disc replacement auxiliary tool | |
| CN220007405U (en) | Quick disassembling and replacing sealing mechanism for sealing chamber body of shot blasting machine | |
| CN219404115U (en) | Disassembling tool for wedge block of turbine device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |