阅读说明：本技术 一种盾构主轴承温度场测试系统及方法 (System and method for testing temperature field of shield main bearing ) 是由 段文军 莫继良 章龙管 李恒 曹伟 范志勇 杨鹏 冯赟杰 张成帆 王好平 周仲荣 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种盾构主轴承温度场测试系统及方法,包括待测主轴承、主轴承固定座、加载系统、驱动系统、基座、加载盘、润滑系统和控制柜,待测主轴承转动安装于主轴承固定座的主轴承安装腔中；驱动系统、加载系统、润滑系统分别与控制柜电连接,驱动系统用于驱动待测主轴承转动,加载系统包括轴向加载装置、径向加载装置和倾覆力矩加载系统,润滑系统包括注油泵和注油管,主轴承固定座的轴向槽中安装有温度传感器,密封后盖板的圆筒上安装有润滑油喷嘴。本发明可以研究在单作用载荷或多种载荷耦合作用下主轴承温度场的分布特性,也可以研究在不同转速、良好润滑、润滑失效、无润滑状态下主轴承温度场的分布特性。(The invention discloses a shield main bearing temperature field testing system and a method, comprising a main bearing to be tested, a main bearing fixing seat, a loading system, a driving system, a base, a loading disc, a lubricating system and a control cabinet, wherein the main bearing to be tested is rotatably arranged in a main bearing mounting cavity of the main bearing fixing seat; the driving system, the loading system and the lubricating system are respectively electrically connected with the control cabinet, the driving system is used for driving the main bearing to be tested to rotate, the loading system comprises an axial loading device, a radial loading device and an overturning moment loading system, the lubricating system comprises an oil injection pump and an oil injection pipe, a temperature sensor is installed in an axial groove of a main bearing fixing seat, and a lubricating oil nozzle is installed on a cylinder of the sealed rear cover plate. The invention can research the distribution characteristics of the temperature field of the main bearing under the coupling action of single-acting load or multiple loads, and can also research the distribution characteristics of the temperature field of the main bearing under different rotating speeds, good lubrication, lubrication failure and no-lubrication states.)

1. The utility model provides a shield constructs main bearing temperature field test system, includes main bearing (1) that awaits measuring, main bearing (1) that awaits measuring inside has the ring gear, it has the internal tooth its characterized in that to be circumference continuous distribution on the ring gear: the device is characterized by further comprising a main bearing fixing seat (2), a loading system, a driving system (4), a base (5), a loading disc (6), a lubricating system (7) and a control cabinet (8), wherein the main bearing fixing seat (2), the driving system (4), the loading system and the lubricating system (7) are installed on the base (5), a through hole (21) penetrates through the center of the main bearing fixing seat (2), the main bearing fixing seat (2) is provided with a main bearing installation cavity (22) communicated with the through hole (21), and the main bearing (1) to be tested is rotatably installed in the main bearing installation cavity (22) of the main bearing fixing seat (2); the driving system (4), the loading system and the lubricating system (7) are respectively and electrically connected with the control cabinet (8), the driving system (4) is used for driving the main bearing (1) to be tested to rotate, the loading system comprises an axial loading device (3), a radial loading device (11) and an overturning moment loading system, the main bearing (1) to be tested is correspondingly provided with a loading disc (6) in parallel, the center of the loading disc (6) corresponds to the center of the main bearing (1) to be tested, the axial loading device (3) is used for axially acting on the loading disc (6) to realize axial loading on the main bearing (1) to be tested, the radial loading device (11) is used for radially acting on the loading disc (6) to realize radial loading on the main bearing (1) to be tested, the overturning moment loading system is composed of two overturning moment loading devices (12), and the two overturning moment loading devices (12) are correspondingly arranged on two sides of the loading disc (6), two overturning moment loading devices (12) of the overturning moment loading system respectively and symmetrically act on two sides of the loading disc (6) to realize the loading of the overturning moment of the main bearing (1) to be tested; lubricating system (7) are including the oiling pump and the oiling pipe that is connected with the oiling pump, the base bearing installation cavity (22) of base bearing fixing base (2) is circumference evenly distributed and is equipped with axial groove (23), install temperature sensor in axial groove (23), all temperature sensor all are connected with switch board (8) electricity, sealed front shroud (9) and sealed back shroud (10) are installed respectively to main bearing (1) both sides of awaiting measuring, sealed back shroud (10) have drum (101) in stretching into the ring gear of main bearing (1) of awaiting measuring, install lubricating oil nozzle (102) that are linked together with the oiling pipe on drum (101).

2. The shield main bearing temperature field testing system according to claim 1, wherein: the driving system (4) comprises a driving support seat (47), a motor (41) and a speed reducer (42), the motor (41) is electrically connected with the control cabinet (8), the driving support seat (47) is fixedly arranged on the base (5), the motor (41) and the speed reducer (42) are fixedly arranged at the top of the driving support seat (47), the motor (41) is correspondingly and dynamically connected with the speed reducer (42), a power shaft of the speed reducer (42) is dynamically connected with a driving shaft (44) through a coupler (43), the top of the driving support seat (47) is fixedly provided with a bearing seat (45), the driving shaft (44) is rotatably arranged on the bearing seat (45), the driving shaft (44) penetrates through the cylinder (101), a bearing matched with the driving shaft (44) is arranged inside the cylinder (101), and the end part of the driving shaft (44) is fixedly provided with a driving gear (46), the driving gear (46) is meshed with an internal gear of an annular gear of the main bearing (1) to be tested.

3. A shield main bearing temperature field testing system according to claim 1 or 2, wherein: the number of the lubricating oil nozzles (102) is four, the four lubricating oil nozzles (102) are uniformly arranged on the cylinder (101), and the lubricating oil nozzles (102) correspond to an internal gear of an annular gear of the main bearing (1) to be tested.

4. The shield main bearing temperature field testing system according to claim 1, wherein: the axial loading device (3) comprises an oil cylinder supporting frame A (310), an axial loading oil cylinder (31), a pressure sensor A (34), a centering loading device (37) and a spherical loading head (36), wherein the oil cylinder supporting frame A (310) is fixed on the base (5), the axial loading oil cylinder (31) is fixedly installed at the top of the oil cylinder supporting frame A (310), the axial loading oil cylinder (31) is electrically connected with the control cabinet (8), the axial loading oil cylinder (31) is provided with an axial loading rod, a mounting flange A (33) is installed on the axial loading rod of the axial loading oil cylinder (31), the pressure sensor A (34) is installed on the mounting flange A (33), the pressure sensor A (34) is electrically connected with the control cabinet (8), and the spherical loading head (36) is correspondingly installed on the pressure sensor A (34); the center of the loading disc (6) is provided with a bearing fixing seat (38), the center of the inside of the bearing fixing seat (38) is provided with a tapered roller bearing (311), the centering loading device (37) and the bearing fixing seat (38) are correspondingly installed, the centering loading device (37) is matched with an inner ring of the tapered roller bearing (311), and the centering loading device (37) is provided with a hemispherical hole matched with the spherical loading head (36).

5. The shield main bearing temperature field testing system according to claim 1, wherein: the radial loading device (11) comprises an oil cylinder support (117), a radial loading oil cylinder (111), a pressure sensor B (114) and a radial loading head (116), wherein the oil cylinder support (117) is fixed on the base (5), the radial loading oil cylinder (111) is fixedly installed on the oil cylinder support (117), the radial loading oil cylinder (111) is electrically connected with the control cabinet (8), the radial loading oil cylinder (111) is provided with a radial loading rod, a mounting flange B (113) is installed on the radial loading rod of the radial loading oil cylinder (111), the pressure sensor B (114) is installed on the mounting flange B (113), the pressure sensor B (114) is electrically connected with the control cabinet (8), and the radial loading head (116) is correspondingly installed on the pressure sensor B (114); the outer edge of the loading disc (6) is circumferentially provided with a radial loading raceway, and the radial loading head (116) is provided with a radial loading roller matched with the radial loading raceway.

6. The shield main bearing temperature field testing system according to claim 1, wherein: the overturning moment loading device (12) comprises an oil cylinder supporting frame B (122), an overturning moment loading oil cylinder (121), a pressure sensor C (125) and an overturning moment loading head (127), the cylinder supporting frame B (122) is fixed on the base (5), the overturning moment loading cylinder (121) is fixedly arranged at the top of the cylinder supporting frame B (122), the overturning moment loading oil cylinder (121) is electrically connected with the control cabinet (8), the overturning moment loading oil cylinder (121) is provided with a moment loading rod, a mounting flange C (124) is arranged on a moment loading rod of the overturning moment loading oil cylinder (121), a pressure sensor C (125) is arranged on the mounting flange C (124), the pressure sensor C (125) is electrically connected with the control cabinet (8), the overturning moment loading head (127) is correspondingly arranged on the pressure sensor C (125); the loading disc (6) is circumferentially provided with a moment loading raceway near the outer edge, and the overturning moment loading head (127) is provided with a moment loading roller matched with the moment loading raceway.

7. The shield main bearing temperature field testing system according to claim 4, wherein: the mounting flange A (33) is mounted on an axial loading rod of the axial loading oil cylinder (31) in a threaded mode and is locked through a locking nut A (32); the spherical loading head (36) is installed on the pressure sensor A (34) in a threaded mode and is locked through a locking nut B (35); the tail end of the centering loading device (37) is connected and fixed on the bearing fixing seat (38) through a loosening nut (39).

8. The shield main bearing temperature field testing system according to claim 5, wherein: the mounting flange B (113) is mounted on a radial loading rod of the radial loading oil cylinder (111) in a threaded mode and is locked through a locking nut C (112); the radial loading head (116) is screwed on the pressure sensor B (114) and locked by a locking nut D (115).

9. The shield main bearing temperature field testing system according to claim 6, wherein: the mounting flange C (124) is mounted on a moment loading rod of the overturning moment loading oil cylinder (121) in a threaded mode and is locked through a locking nut E (123); the overturning moment loading head (127) is connected to the pressure sensor C (125) in a threaded manner and is locked by a locking nut F (126).

10. A method for testing the temperature field of a shield main bearing is characterized by comprising the following steps: the method comprises the following steps:

A. the driving system (4) is started through the control cabinet (8), and the driving system (4) drives the main bearing (1) to be tested to rotate; an oil injection pump of the lubricating system (7) is controlled to work through a control cabinet (8), and the oil injection pump sprays lubricating oil to the inner gear ring of the main bearing (1) to be tested through an oil injection pipe and a lubricating oil nozzle (102);

a1, and the transverse loading of the main bearing (1) to be tested is independently carried out: transverse loading is applied to the main bearing (1) to be tested through the axial loading device (3), and the transverse loading reaction force fed back by the pressure sensor A (34) is recorded by the control cabinet (8); meanwhile, all temperature sensors of a main bearing installation cavity (22) of the main bearing fixing seat (2) respectively monitor the temperature value of the main bearing (1) to be tested and feed back the temperature value to the control cabinet (8) in time, and temperature field data of the main bearing (1) to be tested under the condition of only transverse loading can be obtained at the moment; adjusting the thrust of the axial loading device (3) and adding the thrust to the maximum value, simulating the maximum thrust pressure value borne by the main bearing (1) to be tested, and simultaneously obtaining temperature field data under the condition;

a2, and the radial loading of the main bearing (1) to be tested is independently carried out: radial loading is applied to the main bearing (1) to be tested through a radial loading device (11), and the control cabinet (8) records the radial loading reaction force fed back by the pressure sensor B (114); meanwhile, all temperature sensors of a main bearing installation cavity (22) of the main bearing fixing seat (2) respectively monitor the temperature value of the main bearing (1) to be tested and feed back the temperature value to the control cabinet (8) in time, and temperature field data of the main bearing (1) to be tested under the condition of only radial loading can be obtained at the moment; adjusting the thrust of the radial loading device (11) and adding the thrust to the maximum value, simulating the radial maximum pressure value borne by the main bearing (1) to be tested, and simultaneously obtaining temperature field data under the condition;

a3, independently loading the overturning moment of the main bearing (1) to be tested: applying an overturning moment load to the main bearing (1) to be tested through an overturning moment loading device (12), and recording an overturning moment load reaction force fed back by a pressure sensor C (125) by a control cabinet (8); meanwhile, all temperature sensors of a main bearing installation cavity (22) of the main bearing fixing seat (2) respectively monitor the temperature value of the main bearing (1) to be tested and feed back the temperature value to the control cabinet (8) in time, and temperature field data of the main bearing (1) to be tested under the condition of only overturning moment loading can be obtained at the moment; adjusting the thrust of the overturning moment loading device (12) and adding the thrust to the maximum value, simulating the maximum overturning moment value borne by the main bearing (1) to be tested, and simultaneously obtaining temperature field data under the condition;

a4, synchronously combining the transverse loading, the radial loading and the overturning moment loading of the main bearing (1) to be tested: transverse loading is applied to the main bearing (1) to be tested through the axial loading device (3), and the transverse loading reaction force fed back by the pressure sensor A (34) is recorded by the control cabinet (8); radial loading is applied to the main bearing (1) to be tested through a radial loading device (11), and the control cabinet (8) records the radial loading reaction force fed back by the pressure sensor B (114); applying an overturning moment load to the main bearing (1) to be tested through an overturning moment loading device (12), and recording an overturning moment load reaction force fed back by a pressure sensor C (125) by a control cabinet (8); simultaneously, all temperature sensors of a main bearing installation cavity (22) of the main bearing fixing seat (2) respectively monitor the temperature value of the main bearing (1) to be tested and feed back the temperature value to the control cabinet (8) in time, and temperature field data of the main bearing (1) to be tested under the combined action of transverse loading, radial loading and overturning moment loading can be obtained at the moment.

Technical Field

The invention relates to the technical field of tunneling of TBM rock tunnel boring machines, in particular to a system and a method for testing a temperature field of a shield main bearing.

Background

At present, many major cities in China are in subway construction, and a shield construction method is widely applied to subway construction as a safe and efficient tunnel excavation technology. Shield construction is the excavation of a tunnel below the ground by a shield machine. The shield machine is a large-scale engineering machine integrating high technology, high standard and high quality, key parts of the shield machine in China mainly depend on import at present, so that the cost of the shield machine in China is greatly improved, the replacement of the key parts of the shield machine in the shield construction process is very inconvenient, and great restriction is brought to the maintenance work of the key parts of the shield machine, so that the construction period of the shield construction is greatly influenced. The establishment of the standard of key parts of the shield machine is still to be perfected in China, the establishment of the industrial standard of the key parts of the shield machine is urgent in order to promote the localization of the key parts of the shield machine and promote the transformation and upgrading of the manufacturing industry of the shield machine, and the establishment of an industrial test platform can be used for testing the performance of the key parts of the shield machine and collecting data for the design and the manufacture of the key parts of the shield machine.

The main bearing of the shield machine is a core component in a cutter head driving system of the shield machine, plays a role in supporting the cutter head of the shield machine and enabling the cutter head to rotate to break rocks, and the safety and the stability of the main bearing during operation are the precondition for ensuring the safe propulsion of the tunneling construction. Therefore, the service life of the main bearing directly influences the service cycle of the shield machine. And in the tunneling operation process of the shield tunneling machine, the overhigh temperature rise/overlarge bearing pressure of the main bearing is increasingly highlighted. The temperature distribution state of the main bearing has great influence on the performance of the bearing, and the temperature distribution state of the main bearing can influence the material shaping increase of the main bearing, reduce the viscosity of lubricating grease and reduce the fatigue life of the main bearing.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a system and a method for testing the temperature field of the shield main bearing, wherein the axial, radial and overturning moment loading devices of the loading system can be used for independently applying loads to the main bearing, or a control variable method is adopted for analysis, and the other force or moment is changed on the premise of fixing the two forces or moments so as to research the distribution characteristic of the temperature field of the main bearing under the coupling action of single-acting loads or various loads.

The purpose of the invention is realized by the following technical scheme:

a temperature field testing system for a shield main bearing comprises a main bearing to be tested, a main bearing fixing seat, a loading system, a driving system, a base, a loading disc, a lubricating system and a control cabinet, wherein an inner gear ring is arranged in the main bearing to be tested, inner teeth are continuously distributed on the inner gear ring in a circumferential manner, the main bearing fixing seat, the driving system, the loading system and the lubricating system are installed on the base, a through hole penetrates through the center of the main bearing fixing seat, the main bearing fixing seat is provided with a main bearing installation cavity communicated with the through hole, and the main bearing to be tested is rotatably installed in the main bearing installation cavity of; the driving system, the loading system and the lubricating system are respectively and electrically connected with the control cabinet, the driving system is used for driving the main bearing to be tested to rotate, the loading system comprises an axial loading device, a radial loading device and an overturning moment loading system, the main bearing to be tested is correspondingly provided with a loading disc in parallel, the center of the loading disc corresponds to the center of the main bearing to be tested, the axial loading device is used for axially acting on the loading disc to realize axial loading on the main bearing to be tested, the radial loading device is used for radially acting on the loading disc to realize radial loading on the main bearing to be tested, the overturning moment loading system consists of two overturning moment loading devices which are correspondingly arranged at two sides of the loading disc, the two overturning moment loading devices of the overturning moment loading system respectively and symmetrically act on two sides of the loading disc to realize the loading of the overturning moment of the main bearing to be tested; lubricating system includes the oiling pump and the notes oil pipe that is connected with the oiling pump, the oiling pump is connected with the switch board electricity, the base bearing installation cavity of base bearing fixing base is circumference evenly distributed and is equipped with the axial groove, install temperature sensor in the axial groove, all temperature sensor all are connected with the switch board electricity, sealed front shroud and sealed back shroud are installed respectively to both sides around the base bearing that awaits measuring, sealed back shroud has the drum in stretching into the ring gear of the base bearing that awaits measuring, install the lubricating oil nozzle who is linked together with the oiling pipe on the drum.

In order to better realize the invention, the driving system comprises a driving support seat, a motor and a speed reducer, wherein the motor is electrically connected with the control cabinet, the driving support seat is fixedly arranged on the base, the motor and the speed reducer are fixedly arranged at the top of the driving support seat, the motor is in corresponding power connection with the speed reducer, a power shaft of the speed reducer is in power connection with a driving shaft through a coupler, the top of the driving support seat is fixedly provided with a bearing seat, the driving shaft is rotatably arranged on the bearing seat, the driving shaft penetrates through a cylinder, a bearing matched with the driving shaft is arranged in the cylinder, the end part of the driving shaft is fixedly provided with a driving gear, and the driving gear is.

Preferably, the number of the lubricating oil nozzles is four, the four lubricating oil nozzles are uniformly arranged on the cylinder, and the lubricating oil nozzles correspond to the internal gear of the annular gear of the main bearing to be tested.

Preferably, the axial loading device comprises an oil cylinder support frame A, an axial loading oil cylinder, a pressure sensor A, a centering loading device and a spherical loading head, wherein the oil cylinder support frame A is fixed on the base, the axial loading oil cylinder is fixedly installed at the top of the oil cylinder support frame A, the axial loading oil cylinder is electrically connected with the control cabinet, the axial loading oil cylinder is provided with an axial loading rod, an installation flange A is installed on the axial loading rod of the axial loading oil cylinder, the pressure sensor A is installed on the installation flange A, the pressure sensor A is electrically connected with the control cabinet, and the spherical loading head is correspondingly installed on the pressure sensor A; the center of the loading disc is provided with a bearing fixing seat, the center of the inside of the bearing fixing seat is provided with a tapered roller bearing, the centering loading device is correspondingly installed with the bearing fixing seat, the centering loading device is matched with an inner ring of the tapered roller bearing, and the centering loading device is provided with a hemispherical hole matched with the spherical loading head.

Preferably, the radial loading device comprises an oil cylinder support, a radial loading oil cylinder, a pressure sensor B and a radial loading head, the oil cylinder support is fixed on the base, the radial loading oil cylinder is fixedly installed on the oil cylinder support, the radial loading oil cylinder is electrically connected with the control cabinet, the radial loading oil cylinder is provided with a radial loading rod, a mounting flange B is installed on the radial loading rod of the radial loading oil cylinder, the pressure sensor B is installed on the mounting flange B, the pressure sensor B is electrically connected with the control cabinet, and the radial loading head is correspondingly installed on the pressure sensor B; the outer edge of the loading disc is circumferentially provided with a radial loading raceway, and the radial loading head is provided with a radial loading roller matched with the radial loading raceway.

Preferably, the overturning moment loading device comprises an oil cylinder supporting frame B, an overturning moment loading oil cylinder, a pressure sensor C and an overturning moment loading head, wherein the oil cylinder supporting frame B is fixed on the base, the overturning moment loading oil cylinder is fixedly arranged at the top of the oil cylinder supporting frame B, the overturning moment loading oil cylinder is electrically connected with the control cabinet, the overturning moment loading oil cylinder is provided with a moment loading rod, a mounting flange C is arranged on the moment loading rod of the overturning moment loading oil cylinder, the pressure sensor C is arranged on the mounting flange C, the pressure sensor C is electrically connected with the control cabinet, and the overturning moment loading head is correspondingly arranged on the pressure sensor C; the loading disc is circumferentially provided with a moment loading raceway near the outer edge, and the overturning moment loading head is provided with a moment loading roller matched with the moment loading raceway.

Preferably, the mounting flange A is mounted on an axial loading rod of an axial loading oil cylinder in a threaded manner and is locked by a locking nut A; the spherical loading head is installed on the pressure sensor A in a threaded mode and is locked through the locking nut B; the tail end of the centering loading device is connected and fixed on the bearing fixing seat through a loosening nut.

Preferably, the mounting flange B is mounted on a radial loading rod of a radial loading oil cylinder in a threaded manner and is locked by a locking nut C; the radial loading head is connected to the pressure sensor B in a threaded mode and locked through a locking nut D.

Preferably, the mounting flange C is mounted on a moment loading rod of the overturning moment loading oil cylinder in a threaded manner and is locked by a locking nut E; the overturning moment loading head is connected to the pressure sensor C in a threaded mode and locked through a locking nut F.

A method for testing the temperature field of a shield main bearing comprises the following steps:

A. starting a driving system through a control cabinet, and enabling the driving system to drive a main bearing to be tested to rotate; an oil injection pump of the lubricating system is controlled to work through a control cabinet, and lubricating oil is sprayed to the inner gear ring of the main bearing to be tested by the oil injection pump through an oil injection pipe and a lubricating oil nozzle;

a1, independently carrying out the transverse loading of the main bearing to be tested: applying transverse loading to the main bearing to be tested through an axial loading device, and recording transverse loading reaction force fed back by the pressure sensor A by the control cabinet; meanwhile, all temperature sensors of a main bearing installation cavity of the main bearing fixing seat respectively monitor temperature values of the main bearing to be measured and feed the temperature values back to the control cabinet in time, and temperature field data of the main bearing to be measured under the condition of only transverse loading can be obtained; adjusting the thrust of the axial loading device and adding the thrust to the maximum value, simulating the maximum thrust pressure value borne by the main bearing to be tested, and simultaneously obtaining temperature field data under the condition;

a2, independently carrying out radial loading on the main bearing to be tested: radial loading is applied to the main bearing to be tested through a radial loading device, and the control cabinet records the radial loading reaction force fed back by the pressure sensor B; meanwhile, all temperature sensors of a main bearing installation cavity of the main bearing fixing seat respectively monitor temperature values of the main bearing to be measured and feed the temperature values back to the control cabinet in time, and temperature field data of the main bearing to be measured under the condition of only radial loading can be obtained; adjusting the thrust of the radial loading device and adding the thrust to the maximum value, simulating the radial maximum pressure value borne by the main bearing to be tested, and simultaneously obtaining temperature field data under the condition;

a3, independently loading the overturning moment of the main bearing to be tested: applying overturning moment loading to the main bearing to be tested through an overturning moment loading device, and recording the overturning moment loading reaction force fed back by the pressure sensor C by the control cabinet; simultaneously, all temperature sensors of a main bearing installation cavity of the main bearing fixing seat respectively monitor temperature values of the main bearing to be measured and feed the temperature values back to the control cabinet in time, and temperature field data of the main bearing to be measured under the condition of only overturning moment loading can be obtained; adjusting the thrust of the overturning moment loading device and adding the thrust to the maximum value, simulating the maximum overturning moment value borne by the main bearing to be tested, and simultaneously obtaining temperature field data under the condition;

a4, synchronously combining the transverse loading, the radial loading and the overturning moment loading of the main bearing to be tested: applying transverse loading to the main bearing to be tested through an axial loading device, and recording transverse loading reaction force fed back by the pressure sensor A by the control cabinet; radial loading is applied to the main bearing to be tested through a radial loading device, and the control cabinet records the radial loading reaction force fed back by the pressure sensor B; applying overturning moment loading to the main bearing to be tested through an overturning moment loading device, and recording the overturning moment loading reaction force fed back by the pressure sensor C by the control cabinet; and simultaneously, all temperature sensors of the main bearing mounting cavity of the main bearing fixing seat respectively monitor the temperature value of the main bearing to be tested and feed the temperature value back to the control cabinet in time, and temperature field data of the main bearing to be tested under the combined action of transverse loading, radial loading and overturning moment loading can be obtained at the moment.

Compared with the prior art, the invention has the following advantages and beneficial effects:

(1) the invention can independently apply load to the main bearing through the axial, radial and overturning moment loading devices of the loading system, or analyze by adopting a controlled variable method, change another force or moment under the premise of fixing the two forces or moments, and can research the distribution characteristics of the temperature field of the main bearing under the coupling action of single-acting load or various loads.

(2) The invention can control the rotating speed of the main bearing, the viscosity and the flow of lubricating oil of a lubricating system through the control cabinet, thereby realizing the distribution characteristics and the influence relation of the temperature field of the main bearing under different rotating speeds, good lubrication, lubrication failure and no-lubrication states.

(3) The invention utilizes the temperature sensor pre-embedded in the axial groove of the circumferential surface of the main bearing fixing seat to measure the temperature distribution of the shield main bearing at different rotating speeds, loads and lubricating oil.

(4) According to the invention, the position between the overturning loading device and the loading disc can be adjusted through the mounting groove on the base and the U-shaped groove reserved on the oil cylinder support, so that the effect of adjusting the overturning moment at different positions to apply load to the main bearing is realized, and the effect of simulating various special working conditions is also achieved.

(5) The axial, radial and overturning loading device of the loading system can independently apply loads to the main bearing so as to research the temperature field characteristics of the main bearing under single-acting loads, thereby reserving conditions for the subsequent research of the influence relationship on the temperature field of the main bearing under the coupling action of various loads.

(6) The centering loading device is matched with an inner ring of a tapered roller bearing arranged in a bearing fixing seat, so that the centering property of applying an axial load is realized, and the loading of the axial load is realized through the force application of an oil cylinder. The overturning loading head is contacted with a roller path arranged on the loading disc, and the loading of the overturning load is realized through the force application of an oil cylinder; and the roller of the radial loading head is in contact with the raceway in the circumferential direction of the loading disc, so that the loading of radial force is realized.

(7) The temperature sensor is adopted, the device has the characteristics of small volume, multiple fields without power, one-line multipoint distribution measurement and the like, when the main bearing works at different rotating speeds and different loads, the temperature distribution measurement of the main bearing is realized, the important guarantee is provided for the safe and economic operation of a cutter head driving system, and accurate scientific data is provided for the structure optimization design of the shield main bearing.

(8) Axial grooves are uniformly formed in the circumferential direction of the main bearing fixing seat and used for embedding the temperature sensor so as to obtain a relatively comprehensive temperature field distribution rule of the shield main bearing; the method can effectively measure and obtain the influence of the rheological characteristics of load, rotating speed and lubricating oil on the temperature distribution of the main bearing of the shield main bearing under different working conditions, and provides experimental data for the research on the fatigue life of the main bearing under thermal stress coupling.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a main bearing fixing seat;

FIG. 3 is a schematic structural diagram of a main bearing to be tested assembled on a main bearing fixing seat;

FIG. 4 is a schematic structural diagram of a driving system of the present embodiment;

FIG. 5 is a schematic structural view of the lubrication system and the control cabinet of FIG. 1;

FIG. 6 is a schematic view of the assembly between the radial loading device and the loading plate according to the present embodiment;

FIG. 7 is an assembly schematic view of the main bearing to be tested on the main bearing fixing seat in the embodiment;

FIG. 8 is a schematic structural diagram of a sealing front cover plate according to the present embodiment;

FIG. 9 is a schematic structural diagram of the rear sealing cover plate according to the present embodiment;

FIG. 10 is a schematic structural diagram of an axial loading device according to the present embodiment;

fig. 11 is an assembly diagram of the bearing holder and the tapered roller bearing according to the embodiment;

FIG. 12 is a schematic structural diagram of a radial loading device according to the present embodiment;

fig. 13 is a schematic structural diagram of the overturning moment loading device according to the present embodiment.

Wherein, the names corresponding to the reference numbers in the drawings are:

1-main bearing to be tested, 2-main bearing fixing seat, 21-through hole, 22-main bearing mounting cavity, 23-axial groove, 3-axial loading device, 31-axial loading oil cylinder, 32-locking nut A, 33-mounting flange A, 34-pressure sensor A, 35-locking nut B, 36-spherical loading head, 37-centering loading device, 38-bearing fixing seat, 39-loose nut, 310-oil cylinder supporting frame A, 311-tapered roller bearing, 4-driving system, 41-motor, 42-speed reducer, 43-coupler, 44-driving shaft, 45-bearing seat, 46-driving gear, 47-driving supporting seat, 5-base, 6-loading disc, 7-lubricating system, 8-control cabinet, 9-sealing front cover plate, 10-sealing rear cover plate, 101-cylinder, 102-lubricating oil nozzle, 11-radial loading device, 111-radial loading oil cylinder, 112-locking nuts C, 113-mounting flanges B, 114-pressure sensors B, 115-locking nuts D, 116-radial loading heads, 117-cylinder supports, 12-overturning moment loading devices, 121-overturning moment loading cylinders, 122-cylinder support frames B, 123-locking nuts E, 124-mounting flanges C, 125-pressure sensors C, 126-locking nuts F and 127-overturning moment loading heads.

Detailed Description

The present invention will be described in further detail with reference to the following examples: