Test bed for hydraulic simulation practical training system of shield tunneling machine

Abstract

The invention relates to the technical field of shield tunneling machine hydraulic simulation practical training system tests.The shield tunneling machine hydraulic simulation practical training system tests.The shield tunneling machine hydraulic simulation practical training system tests.The shield tunneling machine hydraulic simulation practical training system tests.The shield tunneling machine hydraulic simulation practical training system tests.The shield tunneling machine hydraulic simulation practical training system tests.The shield tunneling machine hydraulic simulation practical training system testsinclude an outer frame, a floating supporting unit is installed on the circumference of the inner wall of the force-bearing outer ring, a force-bearing ring is installed on the inner side of a fixing device of the floating supporting unit, force-bearing ring outer covers are evenly installed on the outer wall of the force-bearing ring, and one end of the end face of the force-bearing ring is connected with the outer frame through a hydraulic propelling unit; the other end of the end face of the force bearing ring is connected with the outer frame through a load simulation unit. Through a simplified model mechanism, the propelling function of the shield tunneling machine during linear advancing and the angle deflection function of the shield tunneling machine during turning are simulated, and the creative floating supporting function of the force bearing ring truly simulates the function that the cutterhead can deflect in any direction and any angle in the actual working space.

Description

Technical Field

[0001] The present invention relates to the technical field of test benches for shield machine hydraulic simulation training systems, specifically a test bench for shield machine hydraulic simulation training systems. Background Technique

[0002] As a comprehensive tunnel excavation device integrating multiple functions, modern advanced technologies in machinery, electricity, hydraulics, servo control, etc. are applied to shield machines.

[0003] During the actual operation of a shield machine, the direction it travels has a certain angular deviation at a certain position. The principle is that when the piston rod of the hydraulic cylinder extends, it drives the connected rotating cutter head. When the computer calculates the required extension amount of each hydraulic cylinder piston rod according to the required deflection angle, it drives the cutter head to deflect to the specified angle to achieve the turning function of the shield machine.

[0004] As a professional technical basic course with extremely close connection between theory and practice, if a trainee wants to comprehensively master this course, relying solely on theoretical understanding is far from enough. Practical training needs to be gradually strengthened to enhance the practical perception of hydraulic technology and the trainee's hands-on practical ability, and finally achieve the organic integration of theory and practice.

[0005] The shield machine hydraulic test bench simulates the various functions of the shield machine hydraulic system and hydraulic components in actual production, and detects the state information and related displacement, flow rate, speed, etc. information during their actual operation, so that trainees can comprehensively master the working principle and component composition of the hydraulic system through learning.

[0006] During the comprehensive hydraulic transmission experiment teaching, the physical object of the shield machine is scaled proportionally to make a model to simulate the main hydraulic function part of the shield machine - the hydraulic cylinder propulsion system. Summary of the Invention

[0007] The purpose of the present invention is to provide a test bench for a shield machine hydraulic simulation training system to solve the problems raised in the above background technique.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] A test bench for a shield machine hydraulic simulation training system includes an outer frame. An axial translation unit is installed on the inner wall of the outer frame. A bearing outer ring is installed inside the axial translation unit. A floating support unit is installed circumferentially on the inner wall of the bearing outer ring. A bearing ring is installed inside the floating support unit. A bearing ring guard is evenly installed on the outer wall of the bearing ring. One end of the bearing ring is connected to the outer frame through a hydraulic propulsion unit; the other end of the bearing ring is connected to the outer frame through a load simulation unit; an attitude sensor is fixedly installed in the middle of the bearing ring.

[0010] In a preferred embodiment of the present invention, bases are fixedly installed at the four corners of the bottom of the outer frame.

[0011] In a preferred embodiment of the present invention, the axial translation unit includes a slide rail and a pulley fixing plate. The slide rail is fixedly installed on the outer frame through a V-shaped fixing plate, and guide bars are fixedly installed on both sides of the slide rail.

[0012] In a preferred embodiment of the present invention, the pulley fixing plate is fixedly installed on the load-bearing outer ring. Pulleys are installed at both ends of the pulley fixing plate, and the pulleys are connected to the guide bars of the slide rail.

[0013] In a preferred embodiment of the present invention, the floating support unit includes a first spring base and a second spring base. The first spring base is fixedly installed on the load-bearing outer ring, the second spring base is fixedly installed on the load-bearing ring, and a spring is installed between the first spring base and the second spring base.

[0014] In a preferred embodiment of the present invention, a ball head rod connection seat is fixedly installed at one end of the load simulation unit close to the outer frame. A first ball head rod is threadedly connected to the left end of the ball head rod connection seat. The left end of the first ball head rod is connected to a first ball head connection seat, and the first ball head connection seat is threadedly connected in a first threaded seat. The first threaded seat is fixedly installed on the outer frame.

[0015] In a preferred embodiment of the present invention, an internally threaded connecting column is threadedly connected to one side of the load simulation unit close to the load-bearing ring. A second ball head rod is threadedly connected to the right end of the internally threaded connecting column. The right end of the second ball head rod is connected to a second ball head connection seat, and the second ball head connection seat is threadedly connected in a second threaded seat. The second threaded seat is fixedly installed on the load-bearing ring.

[0016] In a preferred embodiment of the present invention, the connection manner of the hydraulic propulsion unit with the outer frame and the load-bearing ring is the same as the connection manner of the load simulation unit with the outer frame and the load-bearing ring.

[0017] In a preferred embodiment of the present invention, both the load simulation unit and the hydraulic propulsion unit are provided in four groups.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention.

[0019] The shield machine hydraulic transmission comprehensive training system designed by our company integrates hydraulic, PLC electrical control and hydraulic simulation technologies. In addition to meeting professional training teaching, it can also carry out skills assessment. Through project-based training, it cultivates students' vocational abilities such as hydraulic pump station installation and commissioning, hydraulic system assembly and commissioning, electrical control technology, PLC application technology, and operation and maintenance of hydraulic and pneumatic systems;

[0020] Moreover, through the physical actions of the scaled-down model of the shield machine, the trainees can clearly and intuitively see how the cutter head (the bearing ring in the experiment) of the shield machine realizes the turning function under the action of the hydraulic cylinder through the control of the hydraulic circuit;

[0021] Through the simplified model mechanism, it simulates the propulsion function of the shield machine when moving straight forward and the turning function when an angle deflection is required. The pioneering floating support function of the bearing ring truly simulates the free swinging phenomenon of the cutter head in the actual working space;

[0022] And this device also has a modular hydraulic control unit: designed with a modular structure, the modules can operate independently or several modules can be combined into a comprehensive control system, which is convenient for equipment upgrading and expansion;

[0023] And this device also has an open design: because the overall modular design scheme is adopted, various hydraulic function modules can be added;

[0024] And this device also has an industrialized design: the hydraulic pump station is designed according to industrial standards and additional assessment points are set; hydraulic proportional valves and stacking valves are used; the simulation device adopts industrial typical control devices, approaching the actual industry application;

[0025] And this device also has an integrated design: the system integrates various industrial hydraulic and pneumatic components, relay control units, and PLC control units. It is a typical electro-hydraulic integrated comprehensive training equipment, which can not only meet the basic hydraulic and pneumatic system training teaching, but also complete engineering training and vocational skills competitions;

[0026] And this device also has low noise: the motor and the pump shaft are integrally connected, the fuel tank and the training platform are placed separately, and high-pressure rubber hoses are used for connection, so that the vibration source and other mechanisms do not form resonance, greatly reducing the noise and vibration generated by the pump station;

[0027] And this device also has strong safety: it is equipped with current-type leakage protection, overcurrent protection to prevent equipment damage caused by misoperation; phase sequence protection, when the phase is broken or the phase sequence changes, the circuit power supply is cut off to prevent the motor from reversing; the system is equipped with an ultra-high pressure unloading protection function to avoid damage to components and ensure safety;

[0028] Add a floating support device for the bearing ring of the shield machine to truly simulate the situation of the cutter head at any angle in space during the actual operation of the shield machine. Description of the Drawings

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0030] Figure 1 It is the front view in the test bench of the hydraulic simulation training system for the shield machine;

[0031] Figure 2 It is the side view in the test bench of the hydraulic simulation training system for the shield machine;

[0032] Figure 3 In the test bench of the hydraulic simulation training system for the shield machine Figure 2 The sectional view along A-A;

[0033] Figure 4 It is the top view in the test bench of the hydraulic simulation training system for the shield machine;

[0034] Figure 5 It is the perspective view in the test bench of the hydraulic simulation training system for the shield machine;

[0035] Figure 6 It is the structural schematic diagram of the axial translation unit and the floating support unit in the test bench of the hydraulic simulation training system for the shield machine;

[0036] Figure 7 It is the side view of the floating support unit in the test bench of the hydraulic simulation training system for the shield machine;

[0037] Figure 8 It is the installation schematic diagram of the attitude sensor in the test bench of the hydraulic simulation training system for the shield machine;

[0038] Figure 9 In the test bench of the hydraulic simulation training system for the shield machine Figure 3 The enlarged view of area A;

[0039] Figure 10 In the test bench of the hydraulic simulation training system for the shield machine Figure 3 The enlarged view of area B.

[0040] In the figure: outer frame 100, base 110, axial translation unit 200, slide rail 210, guide bar 211, slider 220, pulley 221, load-bearing outer ring 300, floating support unit 400, spring base one 410, spring base two 420, spring 430, load-bearing ring 500, hydraulic propulsion unit 600, load simulation unit 700, load-bearing ring shield 800, attitude sensor 900, thread base one 1, ball head connection seat one 2, ball head rod one 3, ball head rod connection seat 4, internal thread connection column 5, ball head rod two 6, ball head connection seat two 7, thread base two 8. Detailed implementation manners

[0041] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0042] Please refer to Figure 1-10 , the test bench of the shield machine hydraulic simulation training system, including an outer frame 100, an axial translation unit 200 is installed on the inner wall of the outer frame 100, a load-bearing outer ring 300 is installed inside the axial translation unit 200, a floating support unit 400 is installed circumferentially on the inner wall of the load-bearing outer ring 300, a load-bearing ring 500 is installed inside the floating support unit 400, a load-bearing ring shield 800 is evenly installed on the outer wall of the load-bearing ring 500, and one end of the load-bearing ring 500 is connected to the outer frame 100 through a hydraulic propulsion unit 600; the other end of the load-bearing ring 500 is connected to the outer frame 100 through a load simulation unit 700; an attitude sensor 900 is fixedly installed in the middle of the load-bearing ring 500. The load-bearing ring 500 simulates the cutter head of the shield machine in-kind. The load-bearing ring 500 is connected to the load-bearing outer ring 300 through a floating support unit 400 to simulate the support and extrusion of the surrounding soil layer on the shield machine shell during actual operation of the shield machine; the load-bearing outer ring 300 is installed with axial translation units 200 at symmetric positions on the left and right to simulate the axial displacement generated when the shield machine turns;

[0043] The attitude sensor 900 is a high-performance three-dimensional motion attitude measurement system based on MEMS technology; it includes motion sensors such as a three-axis gyroscope, a three-axis accelerometer, and a three-axis electronic compass, and obtains temperature-compensated three-dimensional attitude and azimuth data through an embedded low-power ARM processor.

[0044] The base 110 is fixedly installed at the four corners of the bottom of the outer frame 100.

[0045] The axial translation unit 200 includes a slide rail 210 and a slider 220. The slide rail 210 is fixedly installed on the outer frame 100, and guide bars 211 are fixedly installed on both sides of the slide rail 210.

[0046] The slider 220 is fixedly installed on the load-bearing outer ring 300. Pulleys 221 are installed at both ends of the slider 220, and the pulleys 221 are connected to the guide bars 211 of the slide rail 210.

[0047] The floating support unit 400 includes a first spring base 410 and a second spring base 420. The first spring base 410 is fixedly installed on the outer frame 100, the second spring base 420 is fixedly installed on the load-bearing ring 500, and a spring 430 is installed between the first spring base 410 and the second spring base 420.

[0048] At one end of the load simulation unit 700 close to the outer frame 100, a ball head rod connection seat 4 is fixedly installed. A first ball head rod 3 is threadedly connected to the left end of the ball head rod connection seat 4. The left end of the first ball head rod 3 is connected to a first ball head connection seat 2, and the first ball head connection seat 2 is threadedly connected in a first threaded seat 1. The first threaded seat 1 is fixedly installed on the outer frame 100; the load simulation unit 700 is a load simulation oil cylinder, which is a device that simulates the actual working condition load through a hydraulic system and is mainly used for performance tests in test, verification or training scenarios, such as in the fields of construction machinery, aerospace, automotive suspension systems, robot joints, etc. The load simulation unit 700 is used to simulate the resistance and extrusion force generated by the soil layer in front of the load-bearing ring on the cutter head under actual working conditions;

[0049] On the side of the load simulation unit 700 close to the load-bearing ring 500, an internally threaded connecting column 5 is threadedly connected. A second ball head rod 6 is threadedly connected to the right end of the internally threaded connecting column 5. The right end of the second ball head rod 6 is connected to a second ball head connection seat 7, and the second ball head connection seat 7 is threadedly connected in a second threaded seat 8. The second threaded seat 8 is fixedly installed on the load-bearing ring 500.

[0050] The connection method of the hydraulic propulsion unit 600 to the outer frame 100 and the load-bearing ring 500 is the same as that of the load simulation unit 700 to the outer frame 100 and the load-bearing ring 500. The hydraulic propulsion unit simulates the propulsion cylinder of an actual shield machine, and its function is to push the cutter head forward during the normal straight advancement of the shield machine.

[0051] Both the load simulation unit 700 and the hydraulic propulsion unit 600 are set to four groups.

[0052] A shield machine is a large piece of machinery used for tunnel excavation, mainly for projects such as subways and road tunnels. In terms of functions, it integrates functions such as excavation, support, and soil discharge, improving construction efficiency and safety; to enable trainees to better understand the main functions of the hydraulic part of the shield machine, a test bench for the shield machine hydraulic simulation training system is designed;

[0053] The shield machine simulation hydraulic comprehensive training system consists of three major parts: a hydraulic comprehensive training platform, an industrial double-pump hydraulic station, and a scaled-down model of the shield machine. This application mainly describes the scaled-down model of the shield machine in detail.

[0054] The hydraulic comprehensive training platform mainly consists of a training platform, hydraulic component modules, stacked valve training modules, electrical control modules, hydraulic simulation software, measurement and control instruments, assembly and adjustment tools, training accessories, computer desks, etc.

[0055] The industrial double-pump hydraulic station uses two sets of hydraulic pump units. One set is a fixed-displacement piston pump unit, and the other set is a pressure-limiting variable vane pump unit. System pressure regulating components are installed on each set of pump units, and a pump station control unit is supporting. In the pump station system, a system pressure gauge, an air cooler, an accumulator, a liquid level control relay, an oil temperature and liquid level gauge, a pressure pipeline filter, an air filter, etc. are configured;

[0056] The working principle of the present invention is as follows: 1. The bearing ring simulates the cutter head of the actual shield machine. One end face is connected to the spherical hinge bottom plate of the propulsion cylinder, and the other end is connected to the spherical hinge bottom plate of the load cylinder;

[0057] 2. The bearing ring and the outer bearing ring are connected by spring floating, simulating the support and extrusion of the surrounding soil layer on the shield machine shell during actual operation;

[0058] 3. Ultra-thin slide rail devices are installed at the left and right symmetrical positions of the outer bearing ring, simulating the axial displacement generated when the shield machine turns;

[0059] 4. An attitude sensor is installed at the center position of the bearing ring and fixed on the sensor bracket to measure the angle change, acceleration change, and attitude change generated when the bearing ring swings in angle;

[0060] 5. The load simulation unit (four cylinders) is used to simulate the resistance and extrusion force generated by the soil layer in front of the cutter head (bearing ring) on the cutter head under actual working conditions;

[0061] 6. The hydraulic propulsion unit simulates the propulsion cylinder of the actual shield machine. Its function is to push the cutter head forward when the shield machine is moving straight normally; when the shield machine needs to turn, the cutter head can be deflected by a certain angle through different extension amounts of the hydraulic cylinder piston rod, realizing the turning function of the shield machine;

[0062] 7. The floating support unit enables the load-bearing ring (cutter head) to freely swing in space when deflection is required, simulating the deflection of the cutter head at any angle in the actual soil layer space.

[0063] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. Shield machine hydraulic simulation training system test bench, including an outer frame (100), characterized in that: Axial translation units (200) are installed at both ends of the inner wall of the outer frame (100). A load-bearing outer ring (300) is installed away from the inner side of the outer frame (100) on the axial translation units (200). Floating support units (400) are installed circumferentially on the inner wall of the load-bearing outer ring (300). A load-bearing ring (500) is installed away from the inner side of the load-bearing outer ring (300) on the floating support units (400). Load-bearing ring guards (800) are evenly installed on the outer wall of the load-bearing ring (500). One end of the load-bearing ring (500) is connected to the outer frame (100) through a hydraulic propulsion unit (600); the other end of the load-bearing ring (500) is connected to the outer frame (100) through a load simulation unit (700); an attitude sensor (900) is fixedly installed in the middle of the load-bearing ring (500).

2. The test bench of the shield machine hydraulic simulation training system according to claim 1, characterized in that, Bases (110) are fixedly installed at the four corners of the bottom of the outer frame (100).

3. The test bench of the shield machine hydraulic simulation training system according to claim 1, characterized in that, The axial translation unit (200) includes a slide rail (210) and a slider (220). The slide rail (210) is fixedly installed on the outer frame (100) through a slide rail V-shaped fixing plate.

4. The test bench of the shield machine hydraulic simulation training system according to claim 3, characterized in that The slider (220) is fixedly installed on the load-bearing outer ring (300) through a slider fixing plate. Pulleys (221) are installed at both ends of the slider (220). The pulleys (221) are slidably connected to the guide bars (211) of the slide rail (210).

5. The test bench of the shield machine hydraulic simulation training system according to claim 1, characterized in that The floating support unit (400) includes a spring base one (410) and a spring base two (420). The spring base one (410) is fixedly installed on the load-bearing outer ring (300). The spring base two (420) is fixedly installed on the load-bearing ring (500). A spring (430) is installed between the spring base one (410) and the spring base two (420).

6. The test bench of the shield machine hydraulic simulation training system according to claim 1, characterized in that, A ball head rod connection seat (4) is fixedly installed at one end of the load simulation unit (700) close to the outer frame (100). A ball head rod one (3) is threadedly connected to the left end of the ball head rod connection seat (4). The left end of the ball head rod one (3) is connected to a ball head connection seat one (2). The ball head connection seat one (2) is threadedly connected into a thread seat one (1). The thread seat one (1) is fixedly installed on the outer frame (100).

7. The test bench of the shield machine hydraulic simulation training system according to claim 6, characterized in that, An internally threaded connection column (5) is threadedly connected to one side of the load simulation unit (700) close to the load-bearing ring (500). A ball head rod two (6) is threadedly connected to the right end of the internally threaded connection column (5). The right end of the ball head rod two (6) is connected to a ball head connection seat two (7). The ball head connection seat two (7) is threadedly connected into a thread seat two (8). The thread seat two (8) is fixedly installed on the load-bearing ring (500).

8. The test bench of the shield machine hydraulic simulation training system according to claim 1, characterized in that, The connection method of the hydraulic propulsion unit (600) with the outer frame (100) and the load-bearing ring (500) is the same as the connection method of the load simulation unit (700) with the outer frame (100) and the load-bearing ring (500).

9. The test bench of the shield machine hydraulic simulation training system according to claim 7, characterized in that, Both the load simulation unit (700) and the hydraulic propulsion unit (600) are provided in four groups.

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