CN112647938B - Method for rapidly judging abrasion condition of contact surface between guide type sliding shoe and bottom of track - Google Patents
Method for rapidly judging abrasion condition of contact surface between guide type sliding shoe and bottom of track Download PDFInfo
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- CN112647938B CN112647938B CN202011554381.XA CN202011554381A CN112647938B CN 112647938 B CN112647938 B CN 112647938B CN 202011554381 A CN202011554381 A CN 202011554381A CN 112647938 B CN112647938 B CN 112647938B
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- 238000005299 abrasion Methods 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 73
- 238000007373 indentation Methods 0.000 claims abstract description 128
- 230000002194 synthesizing effect Effects 0.000 claims description 9
- 238000005065 mining Methods 0.000 description 8
- 210000003781 tooth socket Anatomy 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
- E21C25/10—Rods; Drums
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C39/00—Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Mechanical Engineering (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a method for rapidly judging the abrasion condition of a contact surface between a guide type sliding shoe and the bottom of a track, which is characterized in that the height position of a theoretical meshing indentation of the guide type sliding shoe and the tooth surface of a pin tooth of a track pin row under different comprehensive abrasion loss states is predetermined according to specific parameters of a walking system, the actual meshing indentation position is measured on site and compared with the theoretical meshing indentation position, so that the comprehensive abrasion loss of the contact surface between the actual guide type sliding shoe and the bottom of the track can be determined, and the respective abrasion loss of the guide type sliding shoe and the track vertical plate can be calculated according to the actual measured effective height of the vertical plate of the pin row. The invention can be used for rapidly judging the abrasion condition of the contact surface of the guide type sliding shoe and the bottom of the track on the underground site and determining whether the guide type sliding shoe needs to be replaced.
Description
Technical Field
The invention relates to a method for quickly judging a wear condition, which is mainly used for a walking system of a mining machine, in particular to a method for quickly judging the wear state of a contact surface between a guide type sliding shoe and the bottom of a track of the mining machine on site, and belongs to the technical field of underground mining machinery.
Background
For mining underground coal or partial non-coal mines (such as bauxite), a double-drum shearer or a mining machine developed based on the double-drum shearer is generally adopted for mining, and the equipment of the type is provided with a guide type sliding shoe structure so as to ensure that a traveling wheel is kept in a good meshing state with a track. However, for the existing rail structure with pin teeth and tooth sockets arranged at intervals, hard massive rocks or mineral aggregates are easily accumulated in the tooth sockets, and due to the arrangement of the tooth rail seat below the tooth sockets, the rocks or mineral aggregates in partial tooth sockets cannot leak downwards, so that the walking wheels are difficult to break the rocks and pass through, and finally, the guide type sliding shoes and the rails are rapidly worn and failed at the bottom contact surface due to huge positive pressure. When the guide type sliding shoes or the guide rails with transitional wear are not replaced in time, the traveling wheels and the guide rails can be damaged quickly due to abnormal meshing.
Although the industry also proposes that the wear-resisting layer of the guide type sliding shoe is periodically measured to determine whether the guide type sliding shoe needs to be replaced, the field implementation is difficult, and the main reason is that the guide type sliding shoe is sleeved on the periphery of the rail in actual use, and the measurement operation is difficult to implement. Equipment manufacturers sometimes provide a wedge-shaped feeler gauge as a measuring tool, but the guide surface is usually in an uneven state due to abrasion, and meanwhile, when the equipment stops, the guide type sliding shoe and the rail can be positioned at any position in the height direction, so that the actual abrasion loss of the wear-resistant layer cannot be accurately measured; furthermore, the track and the guide shoe both have wear layers, and even if a wear amount is obtained by measurement, it cannot be determined whether the measured wear amount is the wear amount of the wear layer on the guide shoe or the wear amount of the wear layer on the track, and it is not known which of the wear layers of the two parts is worn excessively or both of the wear layers are worn excessively. It can be seen that at present, there is no simple and effective method for accurately measuring or judging how much the contact surface between the guide type sliding shoe and the bottom of the track is worn and whether excessive wear exists, and the normal meshing state of the traveling wheels and the track cannot be ensured, so that the reliability of the traveling system is influenced.
Disclosure of Invention
The invention aims to provide a method for quickly judging the abrasion condition of a contact surface between a guide type sliding shoe and the bottom of a track, which can be used for quickly judging the abrasion condition of the contact surface between the guide type sliding shoe and the bottom of the track in an underground field.
The main technical scheme of the invention is as follows:
a method for rapidly judging the abrasion condition of a contact surface of a guide type sliding shoe and the bottom of a track comprises the following steps:
step a: according to the practical specific structural parameters of the guide type sliding shoes, the track and the walking wheels meshed with the track pin row, a series of position lines of theoretical meshing indentations formed on the tooth surfaces between the track pin row sections are drawn in advance respectively aiming at the two conditions of the minimum pitch and the maximum pitch between the track pin row sections, the position lines correspond to the comprehensive abrasion loss gears on the contact surface of the guide type sliding shoes and the bottom of the track one by one, and the upper end points and the lower end points of the position lines correspond to the highest points and the lowest points of the theoretical meshing indentations respectively;
step b: synthesizing the position lines of the theoretical meshing impressions corresponding to each comprehensive wear loss gear by taking the higher one of the upper end points of the position lines of the theoretical meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row at the same comprehensive wear loss gear as the upper end point of the position line of the synthetic meshing impressions on the internode tooth surface corresponding to the comprehensive wear loss gear, taking the lower one of the lower end points of the position lines of the theoretical meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row at the same comprehensive wear loss gear as the lower end point of the position line of the synthetic meshing impressions, obtaining a series of position lines of the synthetic meshing impressions corresponding to the comprehensive wear loss gears on the contact surface of the guide type sliding shoe and the bottom of the track one by taking the top surface of the track pin row as the reference, calibrating the positions of an upper endpoint, a lower endpoint and a height direction middle point of the position line of the synthetic meshing indentation;
step c: measuring the actual meshing indentation position on the tooth surface between the pin row sections of the actually used track by taking the top surface of the pin row of the track as a reference;
step d: comparing the positions of the actual meshing impressions with the positions of the synthetic meshing impressions in the same series, and calculating the estimated comprehensive abrasion loss of the contact surface of the guide type sliding shoe and the bottom of the track which are actually used;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom of the pin row, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom of the pin row to obtain the abrasion loss of the top of the bottom hook of the actually used guide type sliding shoe.
A method for rapidly judging the abrasion condition of a contact surface of a guide type sliding shoe and the bottom of a track comprises the following steps:
step a: according to actual used specific structural parameters of a guide type sliding shoe, a track and a traveling wheel meshed with a track pin row, a series of position lines of theoretical meshing indentations formed on an inner tooth surface of a track pin row joint are drawn in advance, the position lines correspond to comprehensive abrasion loss gears on a contact surface of the guide type sliding shoe and the bottom of the track one by one, and an upper end point and a lower end point of each position line correspond to the highest point and the lowest point of each theoretical meshing indentation respectively;
step b: calibrating the positions of an upper endpoint, a lower endpoint and a middle point in the height direction of the position line of the theoretical meshing indentation by taking the top surface of the track pin row as a reference;
step c: measuring the actual meshing indentation position on the inner tooth surface of the pin row section of the actually used track by taking the top surface of the track pin row as a reference;
step d: comparing the actual positions of the meshing indentations with the positions of the theoretical meshing indentations in the same series, and calculating the estimated comprehensive abrasion loss of the contact surface between the guide type sliding shoe and the bottom of the track, which is actually used;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom surface of the pin row vertical plate, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom surface of the pin row vertical plate to obtain the abrasion loss of the top part of the bottom hook of the actually used guide type sliding shoe.
A method for rapidly judging the abrasion condition of a contact surface of a guide type sliding shoe and the bottom of a track comprises the following steps:
step a: according to actual used specific structural parameters of a guide type sliding shoe, a track and a traveling wheel meshed with a track pin row, aiming at two conditions of minimum pitch and maximum pitch between track pin row sections, a position line of a theoretical limit meshing indentation formed on a tooth surface between the track pin row sections is drawn in advance, the position line corresponds to the maximum allowable comprehensive abrasion loss of a contact surface of the guide type sliding shoe and the bottom of the track, and an upper end point and a lower end point of the position line of the theoretical limit meshing indentation correspond to the highest point and the lowest point of the theoretical limit meshing indentation respectively;
step b: synthesizing the position lines of the theoretical limit meshing impressions corresponding to the maximum allowable comprehensive wear amount under the two conditions of the minimum pitch and the maximum pitch of the track pin row, wherein the synthesizing method comprises the steps of taking the higher one of the upper end points of the position lines of the theoretical limit meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row under the maximum allowable comprehensive wear amount as the upper end point of the position line of the synthetic limit meshing impressions, taking the lower one of the lower end points of the position lines of the theoretical limit meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row under the maximum allowable comprehensive wear amount as the lower end point of the position line of the synthetic limit meshing impressions, and obtaining the position line of the synthetic limit meshing impressions corresponding to the maximum allowable comprehensive wear amount on the contact surface of the guide type sliding shoe and the bottom of the track, calibrating the upper end point and the lower end point of the position line of the synthetic limit meshing indentation by taking the top surface of the track pin row as a reference;
step c: measuring the actual meshing indentation position on the tooth surface between the pin row sections of the actually used track by taking the top surface of the pin row of the track as a reference;
step d: comparing the position of the actual engaging indentation with the position of the synthetic limit engaging indentation, and judging whether the estimated comprehensive abrasion loss at the contact surface of the guide type sliding shoe and the bottom of the track which are actually used reaches the maximum allowable comprehensive abrasion loss or not;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom surface of the pin row vertical plate, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom surface of the pin row vertical plate to obtain the abrasion loss of the top part of the bottom hook of the actually used guide type sliding shoe.
A method for rapidly judging the abrasion condition of a contact surface of a guide type sliding shoe and the bottom of a track comprises the following steps:
step a: according to the actual used specific structural parameters of the guide type sliding shoes, the track and the walking wheels meshed with the track pin row, position lines of theoretical limit meshing indentations formed on the inner tooth surfaces of the track pin row sections, corresponding to the maximum allowable comprehensive abrasion loss at the contact surfaces of the guide type sliding shoes and the bottom of the track, are drawn in advance, and the upper end points and the lower end points of the position lines of the theoretical limit meshing indentations correspond to the highest points and the lowest points of the theoretical limit meshing indentations respectively;
step b: calibrating the upper end point and the lower end point of the position line of the theoretical limit meshing indentation by taking the top surface of the track pin row as a reference;
step c: measuring the position of an actual meshing indentation on the inner tooth surface of a pin row pitch of an actually used track by taking the top surface of the track pin row as a reference;
step d: comparing the position of the actual meshing indentation with the position of the theoretical limit meshing indentation, and judging whether the estimated comprehensive abrasion loss at the contact surface of the guide type sliding shoe and the bottom of the track which are actually used reaches the maximum allowable comprehensive abrasion loss or not;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference between the original height of the pin row vertical plate and the current effective height to obtain the abrasion loss of the bottom surface of the pin row vertical plate, and calculating the difference between the estimated comprehensive abrasion loss and the abrasion loss of the bottom surface of the pin row vertical plate to obtain the abrasion loss of the top part of the bottom hook of the actually used guide type sliding shoe.
The beneficial effects of the invention are:
by adopting the method for quickly judging the wear condition, the wear amounts of the guide type sliding shoe and the track which are actually used can be determined by simply measuring the actual position of the meshing indentation on site, comparing the actual position of the meshing indentation with the theoretical position of the meshing indentation and simply calculating the actual position of the meshing indentation and the theoretical position of the meshing indentation, and the method can provide the quickest judgment basis for on-site replacement. During actual operation, the position value of the actual meshing indentation relative to the top surface of the pin row can be quickly judged by only measuring the position value by the tape measure, and the method is convenient and practical.
The comprehensive judgment method supports the widest comprehensive wear extent range of comparison, and can be used for related judgment of wear states of a bottom hook base body and the like even after a wear-resistant layer is worn out and is not replaced in time. The smaller the gear interval of the comprehensive abrasion loss is, the more detailed the theoretical data is, and the more accurate the judgment effect is. The method can provide judgment basis for the abrasion overrun state.
The fixed point judgment method can be used for judging whether the comprehensive abrasion loss is out of tolerance or not, and is generally used for observing and judging whether the abrasion of the abrasion-resistant layer reaches the maximum allowable value or not at ordinary times. The method can provide judgment basis for the timely replacement of the quick-wear part.
Drawings
FIG. 1 is a schematic illustration of the position of a theoretical meshing impression produced on the flank of a pin row when the top of an unworn guide shoe sole is in contact with the bottom of an unworn pin row;
FIG. 2 is a schematic illustration of the position of a theoretical meshing impression on the tooth flank of a pin row that has been relatively shifted up as a result of the contact of a certain amount of worn guide shoe heel with a certain amount of worn pin row heel;
FIG. 3 is a cross-sectional view of the top of the unworn guide shoe bottom hook in relation to the bottom of the unworn pin row when in contact therewith;
FIG. 4 is a schematic view showing the relationship between the top and bottom positions of the guide shoe bottom hook and the contact surface of the pin row when the combined wear reaches M;
FIG. 5 is a schematic diagram showing the engagement process of the road wheel and the pin row at the minimum pitch state between the pin row sections and the position of the theoretical engagement indentation generated on the tooth surface between the pin row sections when the combined wear M at the contact surface between the top of the bottom hook of the guide type skate and the bottom of the pin row reaches 35 mm;
FIG. 6 is a schematic diagram showing the engaging process of the traveling wheel and the pin row at the maximum pitch state between the pin row nodes when the combined wear M at the contact surface of the top of the bottom hook of the guide type slipper and the bottom of the pin row reaches 50mm, and the position of a theoretical engaging indentation generated on the tooth surface between the pin row nodes;
FIG. 7 is a schematic diagram showing the engagement process of the traveling wheels and the pin row in the pin row pitch (fixed pitch t0) and the position of the theoretical engaging indentation generated on the inner tooth surface of the pin row pitch when the combined wear M at the contact surface of the top of the guide type slipper bottom hook and the pin row bottom reaches 20 mm;
FIG. 8 is a schematic view showing a series of positions of theoretical engaging indentations formed on the tooth surface between the track pin row sections, corresponding to the combined wear amounts M at the contact surface between the top of the guide shoe bottom hook and the pin row bottom being 0mm, 12mm, 24mm, 36mm and 50mm, respectively, at the minimum pitch between the track pin row sections;
FIG. 9 is a schematic view showing the position lines of a series of theoretical engaging indentations formed on the tooth surfaces between the track pin row sections, corresponding to the comprehensive wear amounts M at the contact surfaces between the top of the guide shoe bottom hook and the bottom of the pin row being 0mm, 12mm, 24mm, 36mm and 50mm, respectively, at the maximum pitch between the track pin row sections;
FIG. 10 is a schematic view showing a series of position lines of a synthetic engaging indentation formed on the tooth surface between the track pin row sections, wherein the synthetic wear loss M at the contact surface between the top of the guide shoe bottom hook and the pin row bottom is respectively 0mm, 12mm, 24mm, 36mm and 50 mm;
FIG. 11 is a schematic position line diagram of a series of theoretical meshing marks formed on the inner tooth surface of the track pin row section, wherein the comprehensive wear amounts M at the contact surface of the top of the guide type sliding shoe bottom hook and the bottom of the pin row are respectively 0mm, 12mm, 24mm, 36mm and 50 mm;
fig. 12 is a schematic diagram of actual engagement indentation upward of the walking wheel and the tooth surface of the pin row, which is caused by the condition that the walking wheel and the pin row pin teeth cannot be normally engaged and lifted due to the fact that high-hardness blocks are accumulated at the pin row tooth sockets and cannot be broken and leak, and the contact surface between the top of the bottom hook of the guide-type slipper and the bottom of the pin row is in a huge positive pressure and sliding wear state.
Reference numerals:
1. a traveling wheel;
2. a pin row; 21. a vertical plate; 211. the bottom surface of the vertical plate;
3. a guide shoe; 31. a bottom hook; 311. a bottom hook top surface;
9. engaging the indentation;
A. the distance from the top surface of the bottom hook of the guide sliding shoe to the central hole;
m, comprehensive abrasion loss at the contact surface of the top of the bottom hook of the guide type sliding shoe and the bottom of the pin row;
tmin, minimum pitch between pin row sections; tmax. maximum pitch between pin row sections; t0. pin row pitch is fixed;
h: calibration or measurement of the midpoint of the position line; h 1: calibration or measurement of the upper end point of the position line; h 2: calibration or measurement of the lower end point of the position line.
Detailed Description
The invention discloses a method for quickly judging the abrasion condition of a contact surface between a guide type sliding shoe and the bottom of a track, which is mainly suitable for a traveling system with a guide type sliding shoe 3, a track and traveling wheels 1 in a drum mining machine (including a coal mining machine) as shown in figures 1-12. In this type of walking system, a guiding shoe 3 is usually sleeved on the periphery of the pin row 2 of the track to ensure the proper engagement of the walking wheel 1 and the pin row 2. When the travelling wheel 1 is engaged with the pin row 2, a meshing indentation 9 is generated on the tooth surface of the pin row pin teeth. The track is formed by sequentially connecting pin rows of a pitch, the tooth surfaces of pin teeth of the pin rows can be divided into internode tooth surfaces and internode tooth surfaces, the inner and outer side tooth surfaces of the pin teeth at two ends of one pitch of the pin rows are both internode tooth surfaces, and other tooth surfaces are internode tooth surfaces.
The guide shoe 3 includes a bottom hook 31. The pin row 2 comprises a vertical plate 21. When the pin row tooth socket is accumulated with hard rock or mineral aggregate which cannot be broken and leaked by the travelling wheel, the travelling wheel is forced to be lifted, the meshing indentation 9 moves upwards, and the top surface 311 of the bottom hook is contacted with the bottom surface 211 of the vertical plate to keep the stress balance. Rapid wear occurs when these two surfaces are subjected to a large positive pressure, causing the engagement indentation 9 to move up gradually again. The combined wear amount (i.e., the sum of the combined wear amounts of the bottom surface 211 of the vertical plate and the top surface 311 of the bottom hook) at the contact surface between the top of the bottom hook of the guide shoe and the bottom of the pin row of the rail (which may be simply referred to as the contact surface between the guide shoe and the bottom of the rail) and the upper and lower positions of the meshing indentation 9 are in one-to-one correspondence. The invention utilizes the one-to-one correspondence relationship to deduce the comprehensive abrasion condition of the contact surface of the guide type sliding shoe and the bottom of the track by measuring the upper and lower positions of the actual engaging indentation 9, including judging whether the abrasion reaches the maximum allowable comprehensive abrasion amount, specifically calculating the respective abrasion amounts of the top of the bottom hook of the guide type sliding shoe and the bottom of the track pin row, and further judging whether the respective abrasion amounts of the guide type sliding shoe and the track are over-differential and whether the guide type sliding shoe and the track need to be replaced.
The method for rapidly judging the wear condition of the contact surface between the guide type sliding shoe and the bottom of the track can be divided into a pin row inter-node judgment method (method one) of a comprehensive judgment method, a pin row intra-node judgment method (method two) of the comprehensive judgment method, a pin row inter-node judgment method (method three) of a fixed point judgment method and a pin row intra-node judgment method (method four) of the fixed point judgment method.
The judging method (method one) of pin row between nodes of the comprehensive judging method comprises the following steps:
step a: according to the actual used specific structural parameters of the guide type sliding shoe, the track and the walking wheel meshed with the track pin row, aiming at two conditions of the minimum pitch tmin and the maximum pitch tmax between the track pin row sections, a series of position lines (see fig. 8 and 9) of theoretical meshing indentations formed on the tooth surface between the track pin row sections are drawn in advance, the position lines correspond to comprehensive abrasion loss gears at the contact surface of the guide type sliding shoe and the bottom of the track one by one, and the upper end point and the lower end point of each position line correspond to the highest point and the lowest point of the theoretical meshing indentations respectively;
step b: synthesizing the position lines of the theoretical meshing impressions corresponding to each comprehensive wear level gear by taking the higher one of the upper end points of the position lines of the theoretical meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row at the same comprehensive wear level gear as the upper end point of the position line of the synthetic meshing impressions on the internode tooth surface corresponding to the comprehensive wear level gear, taking the lower one of the lower end points of the position lines of the theoretical meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row at the same comprehensive wear level gear as the lower end point of the position line of the synthetic meshing impressions, obtaining a series of position lines of the synthetic meshing impressions (see figure 10) corresponding to the comprehensive wear level gear at the contact surface of the guide type slipper and the bottom of the track one by taking the top surface of the track pin row as the reference, calibrating the positions of an upper endpoint, a lower endpoint and a height direction middle point of the position line of the synthetic meshing indentation;
step c: measuring the actual meshing indentation position on the tooth surface between the pin row sections of the actually used track by taking the top surface of the pin row of the track as a reference;
step d: comparing the positions of the actual meshing impressions with the positions of the synthetic meshing impressions in the same series, and calculating the estimated comprehensive abrasion loss of the contact surface of the guide type sliding shoe and the bottom of the track which are actually used;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom of the pin row, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom of the pin row to obtain the abrasion loss of the top of the bottom hook of the actually used guide type sliding shoe.
The resulting mating indentations are also theoretical mating indentations. The composite meshing impression covers two extreme conditions of maximum pitch and minimum pitch between the sections, so that the composite meshing impression can be used as a judgment basis for the abrasion condition under the condition of pitch between the sections of the track pin row.
The pin row intra-node judgment method (method two) of the overall judgment method comprises the following steps:
step a: according to the actual used specific structural parameters of the guide type sliding shoes, the track and the walking wheels meshed with the track pin row, a series of position lines of theoretical meshing indentations formed on the inner tooth surfaces of the track pin row sections are drawn in advance (see figure 11), the position lines correspond to comprehensive abrasion loss gears on the contact surface of the guide type sliding shoes and the bottom of the track one by one, and the upper end points and the lower end points of the position lines correspond to the highest point and the lowest point of the theoretical meshing indentations respectively;
step b: calibrating the positions of an upper endpoint, a lower endpoint and a middle point in the height direction of the position line of the theoretical meshing indentation by taking the top surface of the track pin row as a reference;
step c: measuring the position of an actual meshing indentation on the inner tooth surface of a pin row pitch of an actually used track by taking the top surface of the track pin row as a reference;
step d: comparing the actual positions of the meshing indentations with the positions of the theoretical meshing indentations in the same series, and calculating the estimated comprehensive abrasion loss of the contact surface between the guide type sliding shoe and the bottom of the track, which is actually used;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom surface of the pin row vertical plate, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom surface of the pin row vertical plate to obtain the abrasion loss of the top part of the bottom hook of the actually used guide type sliding shoe.
In the first method and the second method, the comprehensive wear level gear comprises a maximum allowable comprehensive wear level gear. Further, the lowest gear in the comprehensive wear loss gears is a gear with zero comprehensive wear loss, and the highest gear can be a gear with the theoretical maximum comprehensive wear loss, which enables the road wheels and the pin row to still keep a meshing state. The gear setting can represent the widest comprehensive wear extent, and not only comprises two conditions of wear and no wear of respective wear-resistant layers at the top of the bottom hook of the guide type sliding shoe and the bottom of the pin row of the track, but also can cover the condition that the bottom hook and/or the pin row base body is worn due to the fact that spare parts are not replaced in time after the wear-resistant layers are completely worn. Therefore, the finally calculated abrasion loss of the bottom surface of the pin row plate and the abrasion loss of the top of the bottom hook of the guide shoe are abrasion loss including the respective abrasion-resistant layers and the base body. The maximum allowable comprehensive wear amount corresponds to the maximum comprehensive wear amount which is provided before the running system works normally, and usually, the top of the bottom hook of the guide type sliding shoe and the bottom of the pin row of the track are respectively provided with a wear-resistant layer with a certain thickness. The smaller the gear interval of the comprehensive abrasion loss is, the more detailed the theoretical data is, and the more accurate the judgment effect is. The two methods can provide judgment basis for the state of the wear overrun (namely the state that the actual comprehensive wear amount exceeds the maximum allowable comprehensive wear amount).
The theoretical maximum comprehensive abrasion loss can be set artificially. Considering that the guide type sliding shoe base body is not wear-resistant compared with the pin row base body, once the wear-resistant layer is worn, the base body is worn quickly, so that the gear value of the theoretical maximum comprehensive wear amount can be selected to be 2-4 times of the maximum allowable comprehensive wear amount on the premise of ensuring that the travelling wheels can be meshed with the pin row.
In step c, the position of the actual meshing impression is preferably represented by the position of the height direction middle point of the actual meshing impression. In the step d, the comprehensive abrasion loss corresponding to the actual meshing indentation can be obtained through calculation of the difference value, and the comprehensive abrasion loss is called as the estimated comprehensive abrasion loss.
The position of the middle point in the height direction of the actual meshing indentation can be determined by respectively measuring the highest point position and the lowest point position of the actual meshing indentation and then taking an average value, or can be directly measured by estimating the middle point in the height direction of the actual meshing indentation through visual observation and using a measuring tape and other tools.
The inter-pin row judgment method (method three) of the fixed point judgment method comprises the following steps:
step a: according to actual used specific structural parameters of a guide type sliding shoe, a track and a traveling wheel meshed with a track pin row, aiming at two conditions of minimum pitch and maximum pitch between track pin row sections, a position line of a theoretical limit meshing indentation formed on a tooth surface between the track pin row sections is drawn in advance, the position line corresponds to the maximum allowable comprehensive abrasion loss of a contact surface of the guide type sliding shoe and the bottom of the track, and an upper end point and a lower end point of the position line of the theoretical limit meshing indentation correspond to the highest point and the lowest point of the theoretical limit meshing indentation respectively;
step b: synthesizing the position lines of the theoretical limit meshing impressions corresponding to the maximum allowable comprehensive wear amount under the two conditions of the minimum pitch and the maximum pitch of the track pin row, wherein the synthesizing method comprises the steps of taking the higher one of the upper end points of the position lines of the theoretical limit meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row under the maximum allowable comprehensive wear amount as the upper end point of the position line of the synthetic limit meshing impressions, taking the lower one of the lower end points of the position lines of the theoretical limit meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row under the maximum allowable comprehensive wear amount as the lower end point of the position line of the synthetic limit meshing impressions, and obtaining the position line of the synthetic limit meshing impressions corresponding to the maximum allowable comprehensive wear amount on the contact surface of the guide type sliding shoe and the bottom of the track, calibrating the upper end point and the lower end point of the position line of the synthetic limit meshing indentation by taking the top surface of the track pin row as a reference;
step c: measuring the actual positions of meshing indentations on the tooth surfaces between the pin row sections of the actually used track by taking the top surface of the track pin row as a reference;
step d: comparing the position of the actual engaging indentation with the position of the synthetic limit engaging indentation, and judging whether the estimated comprehensive abrasion loss at the contact surface of the guide type sliding shoe and the bottom of the track which are actually used reaches the maximum allowable comprehensive abrasion loss or not;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom surface of the pin row vertical plate, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom surface of the pin row vertical plate to obtain the abrasion loss of the top part of the bottom hook of the actually used guide type sliding shoe.
In the first method, the range between the highest point and the lowest point of the synthetic engagement impression is wider than the range between the highest point and the lowest point of the theoretical engagement impression corresponding to the minimum pitch and the maximum pitch between the track pin rows, and in the third method, the range between the highest point and the lowest point of the synthetic limit engagement impression is wider than the range between the highest point and the lowest point of the theoretical limit engagement impression corresponding to the minimum pitch and the maximum pitch between the track pin rows.
The pin row intra-node judgment method (method four) of the fixed point judgment method comprises the following steps:
step a: according to the actual used specific structural parameters of the guide type sliding shoes, the track and the walking wheels meshed with the track pin row, position lines of theoretical limit meshing indentations formed on the inner tooth surfaces of the track pin row sections, corresponding to the maximum allowable comprehensive abrasion loss at the contact surfaces of the guide type sliding shoes and the bottom of the track, are drawn in advance, and the upper end points and the lower end points of the position lines of the theoretical limit meshing indentations correspond to the highest points and the lowest points of the theoretical limit meshing indentations respectively;
step b: calibrating the upper end point and the lower end point of the position line of the theoretical limit meshing indentation by taking the top surface of the rail pin row as a reference;
step c: measuring the position of an actual meshing indentation on the inner tooth surface of a pin row pitch of an actually used track by taking the top surface of the track pin row as a reference;
step d: comparing the position of the actual meshing indentation with the position of the theoretical limit meshing indentation, and judging whether the estimated comprehensive abrasion loss at the contact surface of the guide type sliding shoe and the bottom of the track which are actually used reaches the maximum allowable comprehensive abrasion loss or not;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom surface of the pin row vertical plate, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom surface of the pin row vertical plate to obtain the abrasion loss of the top part of the bottom hook of the actually used guide type sliding shoe.
The third method and the fourth method are suitable for judging whether the comprehensive abrasion loss is out of tolerance, for example, whether the abrasion of the abrasion layer at the top of the bottom hook and the abrasion layer at the bottom of the pin row reaches the maximum allowable value is observed and judged at any time, and the two methods can provide judgment basis for timely replacement of the wearing parts.
In the third and fourth methods, when the positions of the synthetic limit engagement indentations and the theoretical limit engagement indentations are calibrated, only the upper end points of the corresponding position lines may be calibrated. Accordingly, only the position of the highest point of the actual engagement indentation may be measured in step c, which represents the position of the actual engagement indentation, and the determination may be made in step d, and when the position of the actual engagement indentation reaches or exceeds the position of the synthetic limit engagement indentation or the theoretical limit engagement indentation, i.e., it is considered that the estimated integrated wear amount reaches or exceeds the maximum allowable integrated wear amount, at least one of the guide shoe and the pin row should be replaced.
For all four of the above methods, the location of the engagement indentation is presented by drawing a corresponding location line. The position line may be a plane curve segment drawn beside the pin tooth profile line, and upper and lower end points and a middle point of the curve segment are respectively equal in height to an upper end point, a lower end point and a middle point in the height direction of the corresponding meshing indentation. Each comprehensive abrasion loss gear corresponds to a meshing indentation position line at the minimum pitch between pin row sections, a meshing indentation position line at the maximum pitch between pin row sections, a synthetic meshing indentation position line and a meshing indentation position line at the fixed pitch in a pin row section, the same meshing indentation position line of different comprehensive abrasion loss gears is drawn beside the same pin tooth profile line in sequence, and the gradual moving-up process of the meshing indentation along with the increase of the comprehensive abrasion loss can be visually seen.
For the above four methods, the thicknesses of the wear-resistant layers respectively provided on the top of the bottom hook of the guide shoe and the bottom of the pin row may be different according to the abrasiveness of the mineral aggregate, and accordingly, the maximum allowable combined wear amount may be different.
According to the invention, the actual wear degree of the contact surface of the guide type sliding shoe and the bottom of the track can be determined by predetermining the height position of the theoretical meshing indentation of the guide type sliding shoe and the pin tooth surface of the track pin row under different comprehensive wear loss states according to specific parameters of a walking system, measuring the actual meshing indentation position on site and comparing the actual meshing indentation position with the theoretical meshing indentation position, and the fastest judgment method is provided for whether the guide type sliding shoe and the track pin row are replaced on site. During actual operation, the position of the actual meshing indentation can be quickly judged only by measuring the position of the actual meshing indentation with the measuring tape, and the measuring tape is convenient and practical.
Claims (10)
1. A method for rapidly judging the abrasion condition of a contact surface between a guide type sliding shoe and the bottom of a track is characterized by comprising the following steps:
step a: according to the practical specific structural parameters of the guide type sliding shoes, the track and the walking wheels meshed with the track pin row, a series of position lines of theoretical meshing indentations formed on the tooth surfaces between the track pin row sections are drawn in advance respectively aiming at the two conditions of the minimum pitch and the maximum pitch between the track pin row sections, the position lines correspond to the comprehensive abrasion loss gears on the contact surface of the guide type sliding shoes and the bottom of the track one by one, and the upper end points and the lower end points of the position lines correspond to the highest points and the lowest points of the theoretical meshing indentations respectively;
step b: synthesizing the position lines of the theoretical meshing impressions corresponding to each comprehensive wear loss gear by taking the higher one of the upper end points of the position lines of the theoretical meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row at the same comprehensive wear loss gear as the upper end point of the position line of the synthetic meshing impressions on the internode tooth surface corresponding to the comprehensive wear loss gear, taking the lower one of the lower end points of the position lines of the theoretical meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row at the same comprehensive wear loss gear as the lower end point of the position line of the synthetic meshing impressions, obtaining a series of position lines of the synthetic meshing impressions corresponding to the comprehensive wear loss gears on the contact surface of the guide type sliding shoe and the bottom of the track one by taking the top surface of the track pin row as the reference, calibrating the positions of an upper endpoint, a lower endpoint and a height direction middle point of the position line of the synthesized meshing indentation;
step c: measuring the actual meshing indentation position on the tooth surface between the pin row sections of the actually used track by taking the top surface of the pin row of the track as a reference;
step d: comparing the positions of the actual meshing indentations with the positions of the synthesized meshing indentations in the same series, and calculating the estimated comprehensive abrasion loss of the contact surface of the guide type sliding shoe and the bottom of the track which are actually used;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom of the pin row, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom of the pin row to obtain the abrasion loss of the top of the bottom hook of the actually used guide type sliding shoe.
2. A method for rapidly judging the abrasion condition of a contact surface between a guide type sliding shoe and the bottom of a track is characterized by comprising the following steps:
step a: according to the actual used specific structural parameters of the guide type sliding shoes, the track and the walking wheels meshed with the track pin row, a series of position lines of theoretical meshing indentations formed on the inner tooth surfaces of the track pin row sections are drawn in advance, the position lines correspond to comprehensive abrasion loss gears on the contact surfaces of the guide type sliding shoes and the bottom of the track one by one, and the upper end points and the lower end points of the position lines correspond to the highest points and the lowest points of the theoretical meshing indentations respectively;
step b: calibrating the positions of an upper endpoint, a lower endpoint and a middle point in the height direction of the position line of the theoretical meshing indentation by taking the top surface of the track pin row as a reference;
step c: measuring the position of an actual meshing indentation on the inner tooth surface of a pin row pitch of an actually used track by taking the top surface of the track pin row as a reference;
step d: comparing the actual positions of the meshing indentations with the positions of the theoretical meshing indentations in the same series, and calculating the estimated comprehensive abrasion loss of the contact surface between the guide type sliding shoe and the bottom of the track, which is actually used;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom surface of the pin row vertical plate, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom surface of the pin row vertical plate to obtain the abrasion loss of the top part of the bottom hook of the actually used guide type sliding shoe.
3. The method for rapidly judging the wear condition of the contact surface of the guide type sliding shoe and the bottom of the track according to claim 1 or 2, characterized in that: the comprehensive wear amount gear comprises a maximum allowable comprehensive wear amount gear.
4. The method for rapidly judging the abrasion condition of the contact surface of the guide type sliding shoe and the bottom of the track as claimed in claim 3, wherein: the lowest gear in the gears of the comprehensive abrasion loss is a gear with zero comprehensive abrasion loss, and the highest gear is a gear with theoretical maximum comprehensive abrasion loss, which can enable the travelling wheels and the pin rows to still keep an engaged state.
5. The method for rapidly judging the abrasion condition of the contact surface of the guide type sliding shoe and the bottom of the track as claimed in claim 3, wherein: the theoretical maximum comprehensive abrasion loss is 2-4 times of the maximum allowable comprehensive abrasion loss.
6. The method for rapidly judging the abrasion condition of the contact surface of the guide type sliding shoe and the bottom of the track according to claim 1, 2, 3, 4 or 5, characterized in that: in step c, the position of the middle point in the height direction of the actual meshing indentation is used for representing the position of the actual meshing indentation, and in step d, the comprehensive abrasion loss corresponding to the actual meshing indentation is obtained through calculation of the difference value, and the comprehensive abrasion loss is called as the estimated comprehensive abrasion loss.
7. A method for rapidly judging the abrasion condition of a contact surface between a guide type sliding shoe and the bottom of a track is characterized by comprising the following steps of:
step a: according to actual used specific structural parameters of a guide type sliding shoe, a track and a traveling wheel meshed with a track pin row, aiming at two conditions of minimum pitch and maximum pitch between track pin row sections, a position line of a theoretical limit meshing indentation formed on a tooth surface between the track pin row sections is drawn in advance, the position line corresponds to the maximum allowable comprehensive abrasion loss of a contact surface of the guide type sliding shoe and the bottom of the track, and an upper end point and a lower end point of the position line of the theoretical limit meshing indentation correspond to the highest point and the lowest point of the theoretical limit meshing indentation respectively;
step b: synthesizing the position lines of the theoretical limit meshing impressions corresponding to the maximum allowable comprehensive wear amount under the two conditions of the minimum pitch and the maximum pitch of the track pin row, wherein the synthesizing method comprises the steps of taking the higher one of the upper end points of the position lines of the theoretical limit meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row under the maximum allowable comprehensive wear amount as the upper end point of the position line of the synthetic limit meshing impressions, taking the lower one of the lower end points of the position lines of the theoretical limit meshing impressions on the internode tooth surface corresponding to the minimum pitch and the maximum pitch of the track pin row under the maximum allowable comprehensive wear amount as the lower end point of the position line of the synthetic limit meshing impressions, and obtaining the position line of the synthetic limit meshing impressions corresponding to the maximum allowable comprehensive wear amount on the contact surface of the guide type sliding shoe and the bottom of the track, calibrating the upper end point and the lower end point of the position line of the synthetic limit meshing indentation by taking the top surface of the track pin row as a reference;
step c: measuring the actual meshing indentation position on the tooth surface between the pin row sections of the actually used track by taking the top surface of the pin row of the track as a reference;
step d: comparing the position of the actual engaging indentation with the position of the synthetic limit engaging indentation, and judging whether the estimated comprehensive abrasion loss at the contact surface of the guide type sliding shoe and the bottom of the track which are actually used reaches the maximum allowable comprehensive abrasion loss or not;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference value between the original height and the current effective height of the pin row vertical plate to obtain the abrasion loss of the bottom surface of the pin row vertical plate, and calculating the difference value between the estimated comprehensive abrasion loss and the abrasion loss of the bottom surface of the pin row vertical plate to obtain the abrasion loss of the top part of the bottom hook of the actually used guide type sliding shoe.
8. The method for rapidly judging the abrasion condition of the contact surface of the guide type sliding shoe and the bottom of the track as claimed in claim 7, wherein: in the step a, only the upper end point of the position line of the synthetic limit engaging indentation is calibrated by taking the top surface of the track pin row as a reference.
9. A method for rapidly judging the abrasion condition of a contact surface between a guide type sliding shoe and the bottom of a track is characterized by comprising the following steps:
step a: according to the actual used specific structural parameters of the guide type sliding shoes, the track and the walking wheels meshed with the track pin row, position lines of theoretical limit meshing indentations formed on the inner tooth surfaces of the track pin row sections, corresponding to the maximum allowable comprehensive abrasion loss at the contact surfaces of the guide type sliding shoes and the bottom of the track, are drawn in advance, and the upper end points and the lower end points of the position lines of the theoretical limit meshing indentations correspond to the highest points and the lowest points of the theoretical limit meshing indentations respectively;
step b: calibrating the upper end point and the lower end point of the position line of the theoretical limit meshing indentation by taking the top surface of the track pin row as a reference;
step c: measuring the actual meshing indentation position on the inner tooth surface of the pin row section of the actually used track by taking the top surface of the track pin row as a reference;
step d: comparing the position of the actual meshing indentation with the position of the theoretical limit meshing indentation, and judging whether the estimated comprehensive abrasion loss at the contact surface of the guide type sliding shoe and the bottom of the track which are actually used reaches the maximum allowable comprehensive abrasion loss or not;
step e: and measuring the current effective height of the pin row vertical plate of the actually used track by taking the top surface of the track pin row as a reference, calculating the difference between the original height of the pin row vertical plate and the current effective height to obtain the abrasion loss of the bottom surface of the pin row vertical plate, and calculating the difference between the estimated comprehensive abrasion loss and the abrasion loss of the bottom surface of the pin row vertical plate to obtain the abrasion loss of the top part of the bottom hook of the actually used guide type sliding shoe.
10. The method for rapidly judging the abrasion condition of the contact surface of the guide type sliding shoe and the bottom of the track as claimed in claim 9, wherein: in the step a, only calibrating the upper end point of the position line of the theoretical limit meshing indentation by taking the top surface of the track pin row as a reference.
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