CN211602766U

CN211602766U - Hob abrasion test device considering ground stress and geothermal coupling effect

Info

Publication number: CN211602766U
Application number: CN201920807117.9U
Authority: CN
Inventors: 张旭辉; 颜建强; 何谦; 夏毅敏; 潘家骥
Original assignee: Hunan Normal University
Current assignee: Hunan Normal University
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-09-29
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses a consider hobbing cutter wear test device of ground stress and geothermol power coupling effect. The hob abrasion test device applies different stresses to a rock sample through an oil cavity, the heating plate is intelligently controlled through the heating power supply to provide different terrestrial heat for the rock sample, and the passive rotary cutting abrasion of the cutter ring is realized by driving the rock sample to rotate through the variable frequency motor. And monitoring the abrasion load and the temperature characteristic of the cutter ring by adopting a three-way force sensor and a cutter ring infrared thermometer. The hob abrasion test device can complete the whole process of a hob cutter ring cutting abrasion test under different stress and geothermal conditions, and can provide basis for hob cutter ring abrasion resistance design and abrasion life prediction under different stress, geothermal and geothermal stress and geothermal coupling conditions.

Description

Hob abrasion test device considering ground stress and geothermal coupling effect

Technical Field

The utility model relates to a rock tunnel boring machine hobbing cutter cutting wear test technical field, concretely relates to hobbing cutter ring wear test device of simulation ground stress and geothermol power condition.

Background

A rock Tunnel Boring Machine (TBM) is main boring equipment for excavating a hard rock tunnel, the TBM mainly depends on a hob arranged on a cutter head to roll and cut rocks on a tunnel face, and the cutting and rock breaking performance of the hob directly determines the overall boring efficiency of the TBM. The hob is composed of key components such as a hob ring, a hob hub, a bearing, a hob shaft and the like, the hob and rock interact through the hob ring, and due to the fact that huge contact stress and relative sliding speed exist between the hob ring and the rock in the rock breaking process, the hob ring is prone to being severely abraded, and finally the hob is prone to being wholly failed, and therefore the abrasion characteristics and the abrasion service life of the hob ring are a key ring for determining the rock breaking performance of the hob during cutting.

In recent years, with the rise of water diversion, electricity introduction, mining, national defense and other projects in China, TBM tunneling gradually extends to a deep stratum (with a depth of kilometers), and when the tunneling is carried out on the deep stratum, the tunneling is influenced by stratum characteristics, the TBM tunneling can encounter extreme severe strata such as high ground stress, high geothermal energy, high ground stress, high ground thermal coupling and the like, so that the rock breaking working condition of the hob ring is worse, the abrasion of the hob ring is more severe, and the service life of the hob ring is sharply reduced. Therefore, it is necessary to grasp the wear characteristics of the hob ring under different stress and geothermal conditions, so as to design the wear resistance and predict the service life of the hob ring under different stress and geothermal conditions.

Because the abrasion characteristic of the cutter ring is difficult to test in the construction process of the on-site TBM, the difficulty is brought to the understanding of the abrasion mechanism of the hob cutter ring and the service life prediction of the hob cutter ring. By carrying out the abrasion characteristic test of the hob ring indoors, various testing problems (such as testing time, testing position, mounting of testing instruments and the like) in a TBM construction site can be avoided, so that the design of the hob ring abrasion testing device capable of researching the ground stress, the geothermy and the ground stress and geothermy coupling complex stratum is very important.

Through research on relevant documents and data, it can be found that relevant TBM hob ring or hob ring material abrasion test devices are designed by existing relevant units. The invention patents (application numbers: 201510649604.3, 201710905705.1) applied by the medium iron tunnel agency group limited company are respectively named as follows: the device can not realize the abrasion test of the hob ring under different stresses and different geotherms; the invention patent (application number: 201310032227.X) applied by the university of south China is named as: a hard rock hob rock breaking characteristic test device can respectively carry out hob cutting rock breaking and abrasion tests, the simulated motion trail of the test device is also linear cutting abrasion, certain difference exists between the simulated motion trail of the test device and the actual hob rotary cutting abrasion, and the test of the hob cutter ring abrasion test under ground stress and geothermy is difficult to realize; the invention patent (application number: 201811158653.7) filed by the Changsha college is named as: a shield constructs cutter material wearing and tearing laboratory bench, this laboratory bench though can realize the passive mode of cutter ring gyration and cut the wearing and tearing rock, nevertheless also owing to lack to increase ground stress and geothermol power function, and the hobbing cutter ring on this laboratory bench dismantles the installation difficulty, consequently has very big limitation to the research hobbing cutter ring wear characteristic.

The key to achieving cutter ring wear testing under different stresses and different thermal conditions is how to add the corresponding stress and geothermal heat to the corresponding rock. There are also some related rock breaking devices that are involved in increasing ground stress and geothermal heat. The invention patent (application number: 201310086458.9) jointly applied by Beijing university of industry and New Euro mechanical Co., Ltd, Guangzhou city is named as: a mechanical rock breaking test platform relates to a test bed which props against an iron plate on the side face of a rock through a piston rod of a hydraulic oil cylinder so as to realize ground stress loading. Although the loading mode can realize the ground stress loading on four sides of the rock, the loading mode is different from the real circumferential ground stress loading, meanwhile, the loading mode has extremely high requirements on the smoothness of the contact surface of the steel plate and the rock, if the smoothness of the surface of the rock is not enough, the contact imbalance is easily caused by the non-integral rigid contact of the steel plate and the rock, the contact stress is unevenly distributed, and further the ground stress loading failure is easily caused; the invention patent (application number: 201510660510.6) applied by the university of tai atomic workers is named as: the utility model provides a rock sample is generally less and generally heats in the enclosure space that high temperature true triaxial rock experiment machine, this experimental apparatus can realize that the rock heating reaches different temperatures, but because technical scheme's restriction, this kind of experimental apparatus (including other similar rock heating device) adopts, can't provide the hobbing cutter promptly and cut the required sufficient rock face of wearing and tearing.

To sum up, current hobbing cutter sword circle wear test device or other relevant devices are difficult to accomplish the hobbing cutter sword circle wear test under different ground stress, geothermol power and geothermol power coupling complex ground, consequently the utility model discloses to in current hobbing cutter wear test device not enough, combine different ground stress and different ground thermal condition under the hobbing cutter sword circle wearing and tearing research actual demand, designed this kind of geothermol power and the hobbing cutter sword circle wear test device under the geothermol power coupling condition to realize different ground stress, the hobbing cutter sword circle wear test and the monitoring under the geothermol power condition.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simulation is different ground stress and the hobbing cutter sword circle wear test device of different ground thermal conditions, realizes different ground stress, geothermol power and the hobbing cutter sword circle wear test under geothermol power coupling condition and dynamic monitoring thereof, researches the hobbing cutter sword circle wear characteristic under different ground stress and the geothermol power condition, provides the basis for the hobbing cutter sword circle wearability design and the life-span prediction under different ground stress and the geothermol power condition.

The utility model discloses mainly realize through following scheme, the utility model discloses mainly include flexible hydro-cylinder, three-dimensional frame, rock infrared thermometer, frame brace rod, crossbeam brace rod, the crossbeam, the connecting plate, three-dimensional force sensor, the knife rest bolt, the sleeve key, lock nut, the sleeve, the side direction knife rest, the holding ring, the cutter ring, the knife rest bearing, the arbor, the cutter ring key, cutter ring infrared thermometer, the knife rest, the feed bin bolt, the feed bin lid, the hot plate, the heating pipe, power supply wire a, the rock sample, sealing member a, sealing member b, sealing member c, the oil pocket, the oil removal film, oil pipe a, the heat insulation layer, the feed bin, the frame base, oil pipe b, the ground stress hydraulic pump, heating power supply, inverter motor, power supply wire b, the rotary joint, support bearing, slewing bearing.

The telescopic oil cylinder is connected to the middle position of the three-dimensional rack, the rack support ribs are distributed at two right-angle turning positions of the three-dimensional rack, the three-dimensional rack is connected with the rack base, and the rack base is fixed on the ground; the telescopic oil cylinder is connected with the cross beam through a piston rod, and the rock infrared thermometer is distributed in the middle of the cross beam; two cross beam support ribs are symmetrically arranged on the cross beam relative to the middle position of the cross beam, two connecting plates are symmetrically distributed below the cross beam relative to the middle position of the cross beam, and the connecting plates are connected with the cross beam through bolts; the lower part of the connecting plate is connected with the tool rest through the three-way force sensor; two sets of corresponding parts such as the tool rest, the tool ring and the like are symmetrically distributed on the cross beam relative to the middle position of the cross beam.

The cutter ring infrared thermometer is arranged in the middle position right below the cutter frame, one side of the cutter frame for installing the cutter is connected with the lateral cutter frame through the cutter frame bolt, a pair of cutter frame bearings are arranged inside the cutter frame and the lateral cutter frame, the cutter shaft is connected to the inner ring of each cutter frame bearing, the cutter ring is circumferentially positioned on the cutter shaft through the cutter ring key, the positioning ring, the sleeve and the sleeve key are sequentially distributed on the cutter shaft on the right side of the cutter ring, the sleeve key is used for circumferentially positioning the sleeve, and the free end of the cutter shaft is connected with the locking nut; the cutter ring is in contact with the rock sample, and the contact mode of the cutter ring and the rock sample comprises two modes of constant pressure and constant cutting penetration.

The rock sample is placed in the storage bin, the rock sample and the storage bin are both cylindrical, the rock sample is circumferentially wrapped with a layer of oil separation film, an oil cavity is formed between the oil separation film and the storage bin, the oil cavity is connected with the oil pipe a, and the oil pipe a can provide pressure oil with certain pressure in the oil cavity and is used for applying circumferential ground stress to the rock sample; the upper part of the stock bin is connected with the stock bin cover through the stock bin bolts, the stock bin bolts are symmetrically distributed on the stock bin cover, the stock bin cover is tightly pressed on the rock sample and the stock bin, and hydraulic oil is sealed through the sealing piece b and the sealing piece c; the heating plate is arranged below the rock sample, and a large number of heating pipes are arranged in the heating plate and can heat the rock sample to form a geothermal effect; a heat insulation layer is connected below the heating plate, and the heat insulation layer is fixedly connected into the storage bin; a ring of sealing element a is distributed between the heat insulating layer and the oil cavity and used for preventing hydraulic oil from entering a contact surface gap between the rock sample and the heating plate; and the power supply leads on the heating pipe are gathered and connected with the power supply lead a.

The bottom of the bin is connected to the rotary joint, two sides of the edge of the rotary joint are respectively connected with the rotary bearing and the supporting bearing, the rotary bearing is mainly matched with the rotary joint to rotate, and the supporting bearing is connected to the rack base and used for supporting the bin and has the function of preventing the bin from turning over, so that the test device is more stable; the oil pipe a and the power supply lead a are connected above the rotary joint, the oil pipe b and the power supply lead b are connected below the outer ring of the rotary joint, the oil pipe b and the power supply lead b are respectively connected with the ground stress hydraulic pump and the heating power supply, and the winding effect of a hydraulic pipeline and the power supply lead due to the rotation of the storage bin can be avoided through the rotary joint; the direct lower part of the rotary joint is connected with the variable frequency motor through a coupler, and the variable frequency motor is fixedly connected with the ground.

The vertical up-and-down movement of the cutter ring and the cross beam is controlled by the telescopic oil cylinder, and the telescopic oil cylinder has the functions of locking displacement and keeping constant pressure; the circumferential rotation of the storage bin and the rock sample is realized by the variable frequency motor, and the variable frequency motor can realize stepless speed regulation.

The rock infrared thermometer is used for monitoring the temperature of the rock sample in real time, and the heating power supply can intelligently adjust the heating power according to a temperature signal fed back by the rock infrared thermometer in real time; the cutter ring infrared thermometer is used for monitoring the characteristics of the temperature field on the surface of the cutter ring in real time; the three-way force sensor is used for monitoring the three-way load in the cutting and wearing process of the cutter ring in real time.

Compared with the prior art, the utility model discloses can realize the hobbing cutter sword circle wear test under different ground stress, geothermol power and ground stress and geothermol power coupling condition, the hobbing cutter sword circle is sustainable to take place passive roll cutting with the rock in the test process, and is unanimous with hobbing cutter sword circle cutting wear environment under the real deep stratum environment (containing ground stress, geothermol power and ground stress and geothermol power coupling). The related test device adopts hydraulic oil to directly apply ground stress to the rock cylindrical surface, and the non-integral flexible contact can ensure that the ground stress loading of the rock cylindrical surface is uniform, and the problems of uneven stress distribution and the like caused by the non-integral rigid contact of a steel plate and the rock are solved; meanwhile, the heating function of the related device is more automatic, and the functions of quickly heating, keeping constant temperature and the like can be realized; the installation of hobbing cutter sword circle of experimental usefulness is dismantled very conveniently, and the abrasion test device operation flow of involving is simple, and automatic level is high, and stability is strong, can directly obtain characteristics such as hobbing cutter sword circle wearing and tearing load, sword circle temperature field, wearing and tearing volume under different ground stress, geothermol power and geothermol power coupling environment, consequently the utility model discloses there is hobbing cutter sword circle cutting wear process under different ground stress, geothermol power and the geothermol power coupling condition in the realization engineering that can be fine, overcome the unmeasurable difficult problem of hobbing cutter sword circle wearing and tearing under the deep stratum environment, provide experimental data support for hobbing cutter sword circle wearability design and life-span prediction under the deep stratum environment.

Drawings

FIG. 1 is a schematic front view (half-section) of the present invention;

FIG. 2 is an enlarged schematic view of the coupling area of components such as a three-way force sensor, a tool holder, a tool ring, etc.;

FIG. 3 is a schematic side view of a cutter ring;

FIG. 4 is an enlarged schematic front view of a rock sample, a bin cover, a bin and other coupling components;

FIG. 5 is an enlarged schematic top view of the coupling components such as the rock sample and the bin cover;

in the drawings: 1-telescopic oil cylinder, 2-solid frame, 3-rock infrared thermometer, 4-frame support rib, 5-beam support rib, 6-beam, 7-connecting plate, 8-three-way force sensor, 9-tool holder bolt, 10-sleeve key, 11-locking nut, 12-sleeve, 13-lateral tool holder, 14-positioning ring, 15-tool ring, 16-tool holder bearing, 17-tool shaft, 18-tool ring key, 19-tool ring infrared thermometer, 20-tool holder, 21-bin bolt, 22-bin cover, 23-heating plate, 24-heating pipe, 25-power supply lead a, 26-rock sample, 27-seal a, 28-seal b, 29-seal c, 30-an oil chamber, 31-an oil separation film, 32-an oil pipe a, 33-a heat insulation layer, 34-a storage bin, 35-a rack base, 36-an oil pipe b, 37-a ground stress hydraulic pump, 38-a heating power supply, 39-a variable frequency motor, 40-a power supply lead b, 41-a rotary joint, 42-a support bearing and 43-a rotary bearing.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the cutter ring wear test device for simulating ground stress and terrestrial heat is composed of a telescopic cylinder 1, a three-dimensional frame 2, a rock infrared thermometer 3, a frame support rib 4, a beam support rib 5, a beam 6, a connecting plate 7, a three-way force sensor 8, a cutter frame bolt 9, a sleeve key 10, a lock nut 11, a sleeve 12, a lateral cutter frame 13, a positioning ring 14, a cutter ring 15, a cutter frame bearing 16, a cutter shaft 17, a cutter ring key 18, a cutter ring infrared thermometer 19, a cutter frame 20, a bin bolt 21, a bin cover 22, a heating plate 23, a heating pipe 24, a power supply lead a25, a rock sample 26, a27, a sealing b28, a sealing c29, an oil chamber 30, an oil separation film 31, an oil pipe a32, a heat insulating layer 33, a bin 34, a frame base 35, an oil pipe b36, a ground stress hydraulic pump 37, a heating power, the rotary joint 41, the support bearing 42 and the rotary bearing 43.

The telescopic oil cylinder 1 is connected to the middle position of the three-dimensional frame 2, and frame support ribs 4 are distributed at two right-angle turning positions of the three-dimensional frame 2 and used for enhancing the overall mechanical strength and rigidity of the three-dimensional frame 2; the three-dimensional frame 2 is connected with a frame base 35, and the frame base 35 is fixed on the ground; the telescopic oil cylinder 1 is connected with a cross beam 6 through a piston rod, and a rock infrared thermometer 3 is distributed in the middle of the cross beam 6; two cross beam support ribs 5 are symmetrically arranged on the cross beam 6 in relation to the middle position of the cross beam and are used for reinforcing the overall mechanical strength and rigidity of the cross beam 6; two connecting plates 7 are symmetrically distributed below the cross beam 6 about the middle position of the cross beam, and the connecting plates 7 are connected with the cross beam 6 through bolts; the lower part of the connecting plate 7 is connected with a tool rest 20 through a three-way force sensor 8; two sets of corresponding tool rests 20, tool rings 15 and the like are symmetrically distributed on the cross beam 6 relative to the middle position of the cross beam.

As shown in fig. 2, a cutter ring infrared thermometer 19 is arranged in the middle position right below the cutter frame 20, the right side of the cutter frame 20 is connected with the lateral cutter frame 13 through a cutter frame bolt 9, a pair of cutter frame bearings 16 are arranged inside the cutter frame 20 and the lateral cutter frame 13, an inner ring of each cutter frame bearing 16 is connected with a cutter shaft 17, each cutter shaft 17 is a stepped shaft and can be used for respectively positioning the cutter frame bearing 16 and the cutter ring 15, and the left end of each cutter shaft 17 is connected into a through hole in the left side of the cutter frame 20 through; the cutter ring 15 is circumferentially positioned on the cutter shaft 17 through a cutter ring key 18, and a positioning ring 14, a sleeve 12 and a sleeve key 10 are sequentially distributed on the cutter shaft 17 on the right side of the cutter ring 15 and used for axially positioning the cutter ring 15; the sleeve key 10 is used for circumferential positioning of the sleeve 12, the free end of the right side of the cutter shaft 17 is connected with a locking nut 11, and the locking nut 11 is tightly attached to the lateral tool rest 13 after being screwed down; the cutter ring 15 is in contact with the rock sample 26, and the contact mode of the cutter ring 15 and the rock sample 26 comprises two modes of constant pressure and constant cutting penetration and is realized by the control of the telescopic oil cylinder 1; the cutter ring 15 may be passively rotated along with the inner rings of the retaining ring 14, sleeve 12, and tool holder bearing 16.

Considering that the hob ring used in engineering is generally 432mm, the hob ring is expensive, too large in mass and inconvenient to install, and the hob ring abrasion test is not easy to develop. Therefore, the cutter ring 15 related to the utility model is generally optimized to be similar to a cutter ring with a reduced size, the size of the cutter ring 15 adopted is generally one third of that of a cutter ring used in engineering, the diameter size is generally optimized to be 144mm, and the width of the cutting edge is generally optimized to be 5 mm; the material selected for the cutter ring 15 and the mechanical property after heat treatment in the utility model are consistent with the hob cutter ring used in the engineering, and the side view is shown in figure 3.

As shown in fig. 4 and 5, the rock sample 26 is placed in the bin 34, the rock sample 26 and the bin 34 are both cylindrical, the rock sample 26 is circumferentially wrapped by a layer of oil separation film 31, an oil chamber 30 is arranged between the oil separation film 31 and the bin 34, a bin cover 22 is connected above the bin 34 through a bin bolt 21, the bin cover 22 is tightly pressed on the rock sample 26 and the bin 34, and high-pressure hydraulic oil is sealed through a sealing element b28 and a sealing element c 29; the bin bolts 21 are preferably distributed on the bin cover 22 symmetrically, and the number of the bin bolts is preferably 12; oil chamber 30 is connected with oil pipe a32, and oil pipe a32 can provide hydraulic oil with certain pressure in oil chamber 30 for applying circumferential stress to rock sample 26; the oil-separating oil film 31 can prevent high-pressure hydraulic oil from penetrating into a gap inside the rock sample 26, the oil-separating oil film 31 is preferably made of elastic rubber, the oil-separating oil film 31 can be flexibly deformed and is tightly attached to the cylindrical surface of the rock sample 26 under the action of the high-pressure hydraulic oil, so that the rock sample 26 is in non-integral flexible contact with the hydraulic oil, and the uniform loading of ground stress on the cylindrical surface of the rock sample 26 is further realized;

a heating plate 23 is arranged below the rock sample 26, the heating plate 23 is cylindrical, and a positioning table is preferably arranged on the surface of the heating plate 23 generally, so that the rock sample 26 can be positioned and installed accurately; a large number of heating pipes 24 are arranged in the heating plate 23, the heating plate 23 has good thermal conductivity and can heat a rock sample 26 to form a geothermal effect, the heating pipes 24 are preferably composed of high-efficiency heating resistance wires, and the heating pipes 24 are densely arranged in the heating plate 23 in a spiral shape so as to uniformly supply heat to the heating plate 23; the lower part of the heating plate 23 is connected with a heat insulation layer 33, and the lower part of the heat insulation layer 33 is fixedly connected into a storage bin 34; the heat insulation layer 33 has good heat insulation performance, and can effectively prevent the heat in the heating plate 23 from spreading to the storage bin 34; an annular seal a27 is disposed between the insulating layer 33 and the oil chamber 30 to prevent hydraulic oil from entering the interface gap between the rock test piece 26 and the heating plate 23; the power supply lines on the heating tube 24 are connected together by a power supply line a25 and are finally supplied by the heating power source 38.

The bottom of the bin 34 is connected to a rotary joint 41, two sides of the edge of the rotary joint 41 are respectively connected with a rotary bearing 43 and a support bearing 42, the rotary bearing 43 is mainly matched with the rotary joint to rotate, the support bearing 42 is connected to the rack base 35, the support bearing 42 can well bear axial reaction force, is used for bearing the gravity and other effects of the rock sample 26, the bin 34 and the like, and can effectively prevent the bin 34 from turning over due to loading; an oil pipe a32 and a power supply lead a25 are connected above the rotary joint 41, an oil pipe b36 and a power supply lead b40 are connected below the outer ring of the rotary joint 41, the oil pipe b36 and the power supply lead b40 are respectively connected with the ground stress hydraulic pump 37 and the heating power supply 38, and the winding effect of the hydraulic pipeline and the power supply lead caused by the rotation of the bin 34 can be avoided through the rotary joint 41; the lower part of the rotary joint 41 is connected with a variable frequency motor 39 through a coupler, and the variable frequency motor 39 is fixedly connected with the ground.

The vertical movement of the cutter ring 15 and the cross beam 6 in the vertical direction is controlled by the telescopic oil cylinder 1, and the telescopic oil cylinder 1 has the functions of locking displacement and keeping constant pressure, so that the cutting wear test of the cutter ring 15 under two working conditions of constant pressure and constant cutting depth can be realized; the circumferential rotation of the storage bin 34 and the rock sample 26 is realized by a variable frequency motor 39, and the variable frequency motor 39 can be subjected to stepless speed regulation so as to realize the circumferential rotation of the rock sample 26 at different rotating speeds.

The rock infrared thermometer 3 is used for monitoring the temperature of the rock sample 26 in real time and feeding back a temperature signal to the heating power supply 38 in real time; the heating power source 38 preferably has a function of intelligently adjusting power supply, which can adjust power supply according to the temperature value of the rock sample 26 fed back by the rock infrared thermometer 3, when the temperature value of the rock sample 26 is lower than the temperature value of geothermal heat required by the test, the heating power source 38 rapidly supplies power to the heating pipe 24 to prompt the rock sample 26 to be rapidly heated, and when the temperature value of the rock sample 26 reaches the temperature value of geothermal heat required by the test, the heating power source 38 automatically adjusts to a slow power supply mode according to the temperature signal fed back by the rock infrared thermometer 3 to keep the rock sample 26 at the set temperature value without changing; the cutter ring infrared thermometer 19 is used for monitoring the characteristics of the temperature field on the surface of the cutter ring 15 in real time, and can store the monitored characteristics of the temperature field of the cutter ring 15 in real time, so that the subsequent data processing is facilitated; the three-way force sensor 8 is used for monitoring the three-way load of the cutter ring 15 in the cutting abrasion process in real time, and can store the monitored load data in real time, so that the follow-up data processing is facilitated.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Modifications to other structural designs of the invention may be readily effected by those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. A hobbing cutter abrasion test device considering ground stress and geothermy coupling effect is characterized in that: the device is composed of a telescopic oil cylinder (1), a three-dimensional frame (2), a rock infrared thermometer (3), a frame support rib (4), a beam support rib (5), a beam (6), a connecting plate (7), a three-way force sensor (8), a tool rest bolt (9), a sleeve key (10), a locking nut (11), a sleeve (12), a lateral tool rest (13), a positioning ring (14), a tool ring (15), a tool rest bearing (16), a tool shaft (17), a tool ring key (18), a tool ring infrared thermometer (19), a tool rest (20), a bin bolt (21), a bin cover (22), a heating plate (23), a heating pipe (24), a power supply lead a (25), a rock sample (26), a sealing piece a (27), a sealing piece b (28), a sealing piece c (29), an oil cavity (30), an oil separation film (31), an oil pipe a (32), a heat insulation layer (33) and, the device comprises a rack base (35), an oil pipe b (36), a ground stress hydraulic pump (37), a heating power supply (38), a variable frequency motor (39), a power supply lead b (40), a rotary joint (41), a support bearing (42) and a rotary bearing (43);

the telescopic oil cylinder (1) is connected to the middle position of the three-dimensional rack (2), and rack support ribs (4) are distributed at two right-angle corners of the three-dimensional rack (2); the three-dimensional frame (2) is connected with a frame base (35), and the frame base (35) is fixed on the ground; the telescopic oil cylinder (1) is connected with a cross beam (6) through a piston rod, and a rock infrared thermometer (3) is distributed in the middle of the cross beam (6); two cross beam support ribs (5) are symmetrically arranged on the cross beam (6) relative to the middle position of the cross beam; two connecting plates (7) are symmetrically distributed below the cross beam (6) about the middle position of the cross beam, and the connecting plates (7) are connected with the cross beam (6) through bolts; the lower part of the connecting plate (7) is connected with a tool rest (20) through a three-way force sensor (8); two sets of corresponding three-way force sensors (8), tool rests (20) and tool rings (15) are symmetrically distributed on the cross beam (6) in the middle of the cross beam;

the bottom of the cutter ring (15) is in contact with a rock sample (26), a heating plate (23) is arranged below the rock sample (26), a heat insulation layer (33) is connected below the heating plate (23), and the lower part of the heat insulation layer (33) is fixedly connected into a storage bin (34); the bottom of the bin (34) is connected to a rotary joint (41), two sides of the edge of the rotary joint (41) are respectively connected with a rotary bearing (43) and a support bearing (42), the rotary bearing (43) is mainly matched with the rotary joint to rotate, and the support bearing (42) is connected to a rack base (35); the oil pipe a (32) and the power supply lead a (25) are connected above the rotary joint (41), the oil pipe b (36) and the power supply lead b (40) are connected below the outer ring of the rotary joint (41), and the oil pipe b (36) and the power supply lead b (40) are respectively connected with the ground stress hydraulic pump (37) and the heating power supply (38); the right lower part of the rotary joint (41) is connected with a variable frequency motor (39) through a coupler, and the variable frequency motor (39) is fixedly connected with the ground.

2. The hob abrasion test device considering the ground stress and the geothermal coupling effect according to claim 1, wherein: a cutter ring infrared thermometer (19) is arranged in the middle position right below the cutter frame (20), the cutter frame (20) is connected with the lateral cutter frame (13) through a cutter frame bolt (9), a pair of cutter frame bearings (16) are arranged inside the cutter frame (20) and the lateral cutter frame (13), the inner ring of each cutter frame bearing (16) is connected with a cutter shaft (17), and the cutter shaft (17) is a stepped shaft and can be used for respectively positioning the cutter frame bearings (16) and the cutter ring (15); the cutter ring (15) is circumferentially positioned on the cutter shaft (17) through a cutter ring key (18), and a positioning ring (14), a sleeve (12), a sleeve key (10) and a locking nut (11) are sequentially distributed on the cutter ring (15) along the direction of the free end of the cutter shaft (17); the cutter ring (15) can be passively rotated together with the positioning ring (14), the sleeve (12) and the inner ring of the cutter rest bearing (16).

3. The hob abrasion test device considering the ground stress and the geothermal coupling effect according to claim 1, wherein: the circumferential surface of the rock sample (26) is wrapped with a layer of oil-separating film (31), an oil cavity (30) is arranged between the oil-separating film (31) and the stock bin (34), a stock bin cover (22) is connected above the stock bin (34) through a stock bin bolt (21), and a sealing element b (28) and a sealing element c (29) are distributed in the stock bin cover (22); the bin bolts (21) are symmetrically distributed on the bin cover (22); the oil chamber (30) is connected with an oil pipe a (32), and the oil pipe a (32) can provide hydraulic oil with certain pressure in the oil chamber (30).

4. The hob abrasion test device considering the ground stress and the geothermal coupling effect according to claim 1, wherein: a large number of heating pipes (24) are arranged inside the heating plate (23); a ring sealing member a (27) is distributed between the heat insulation layer (33) and the oil chamber (30); the power supply leads on the heating pipe (24) are gathered and connected with the power supply lead a (25) and are powered by a heating power supply (38).

5. The hob abrasion test device considering the ground stress and the geothermal coupling effect according to claim 1, wherein: the telescopic oil cylinder (1) controls the cutter ring (15) to move up and down in the vertical direction, and the telescopic oil cylinder (1) has the functions of locking displacement and keeping constant pressure, so that the cutting wear test of the cutter ring (15) under two working conditions of constant pressure and constant cutting depth can be realized; the circumferential rotation of the stock bin (34) and the rock sample (26) is realized by a variable frequency motor (39), the variable frequency motor (39) can be used for stepless speed regulation, and the circumferential rotation of the rock sample (26) with different rotating speeds can be realized.

6. The hob abrasion test device considering the ground stress and the geothermal coupling effect according to claim 1, wherein: the rock infrared thermometer (3) is used for monitoring the temperature of the rock sample (26) in real time and feeding back a temperature signal to the heating power supply (38) in real time; the heating power supply (38) has the function of intelligently adjusting the power supply power, and the power supply power can be adjusted according to the temperature value of the rock sample (26) fed back by the rock infrared thermometer (3); the cutter ring infrared thermometer (19) is used for monitoring the temperature field characteristics of the surface of the cutter ring (15) in real time; the three-way force sensor (8) is used for monitoring the three-way load of the cutter ring (15) in the cutting and wearing process in real time.