Speed regulating device for TBM (Tunnel Boring Machine) card machine

Abstract

The utility model relates to the technical field of tunneling, and discloses a speed regulating device for a TBM (Tunnel Boring Machine). The technical problems that in the prior art, the escape capacity is insufficient, and the impact rigidity is large in the escape process are solved. The device comprises a plurality of hydro-viscous driving modules, each hydro-viscous driving module comprises a hydro-viscous clutch, one end of each hydro-viscous clutch is connected with a power output shaft of a constant-speed motor through a flywheel capable of storing energy, and the hydro-viscous clutches are used for increasing the releasing torque in the TBM stuck state and reducing the impact rigidity in the releasing process. The other end of the hydro-viscous clutch is connected with a gear through a speed reducer, and the gear is meshed with the gear ring. According to the utility model, the TBM is more efficient and safer in complex underground engineering, and meanwhile, more operation flexibility and control capability are provided for a construction team.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel excavation, in particular to a speed regulating device for a TBM card machine. Background Art

[0002] In the process of tunnel excavation, TBM (Tunnel Boring Machine) is an efficient and fast construction equipment. However, in actual use, due to the complexity and variability of geological conditions, TBM often encounters machine jams, especially in hard rock geology or geological conditions with large boulders. Machine jams will not only delay the construction progress, but also increase maintenance costs and may even cause equipment damage. At present, there are some speed control devices on the market for TBM, but most devices can only adjust the excavation speed to a certain extent, and have limited ability to deal with machine jams. When the cutterhead is driven, the cutterhead drive power curve can be divided into three stages according to different working conditions: full escape conditions, special conditions and normal conditions. Normal working conditions refer to the excavation of TBM in normal surrounding rock environment, and the working power generally only reaches about 1 / 2 of the total installed power. Special working conditions refer to the situation that the TBM cutterhead encounters surrounding rock squeezing conditions and needs to be properly freed, or just enters the state of rotation after being stuck. At this time, the working power is about 2 / 3 of the total installed power. The full free working condition refers to the situation that the cutterhead is stuck, and the variable frequency drive system needs to be kept running at the maximum power (installed power). Therefore, under most excavation conditions, half of the installed power of the variable frequency motor will be idle, resulting in a huge waste of the matching inverter expansion power, and increasing unnecessary manufacturing costs. In addition, the use of full variable frequency drive for the cutterhead drive system will also result in problems such as short duration of freeing and large impact of freeing.

[0003] The Chinese patent document in the prior art: 201720881665.7 discloses a main structure of a single-shield TBM with an anti-jamming machine, including a cutter disc, which is connected to a shield body. The shield body includes a front shield, a middle shield and a tail shield connected in sequence. A plurality of detachable front shield stop slurry brushes are provided at the front end of the front shield, and a plurality of upper tail brushes and a plurality of lower tail brushes are provided on the shield wall at the rear end of the tail shield. The upper tail brushes correspond to the front shield stop slurry brushes. A plurality of thixotropic mud interfaces are provided on the shield walls inside the front shield and the tail shield. The thixotropic mud interfaces are connected to the mud storage tank through a mud pipe, and a mud delivery pump is provided on the mud pipe.

[0004] However, in the implementation process of the above scheme, there are at least the following technical problems: insufficient escape capability and large impact stiffness during the escape process. Therefore, it is urgent to propose a speed regulating device for TBM jammers. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a speed regulating device for a TBM stuck machine, which solves the technical problems of insufficient escape capability and high impact stiffness during the escape process in the prior art. The device can automatically adjust the excavation speed and torque of the TBM according to changes in geological conditions, thereby effectively reducing the occurrence of machine jams and improving excavation efficiency and safety.

[0006] According to one aspect of the present disclosure, a speed regulating device for a TBM stuck machine is provided, which is installed on the gear ring of the TBM cutter disc, and the speed regulating device includes a plurality of liquid viscous drive modules, and the liquid viscous drive module includes a liquid viscous clutch, one end of the liquid viscous clutch is connected to the power output shaft of the constant speed motor via a flywheel capable of storing energy, and is used to increase the escape torque in the TBM stuck machine state and reduce the impact stiffness during the escape process, and the other end of the liquid viscous clutch is connected to a gear via a reducer, and the gear is meshed with the gear ring;

[0007] The hydroviscous clutch comprises a friction disc, an oil film parameter sensor is mounted on the friction disc, a signal collection output end of the oil film parameter sensor is connected to an industrial computer, and a control signal output end of the industrial computer is connected to a constant speed motor.

[0008] In some embodiments of the present disclosure, the oil film parameter sensor includes a pressure sensor, a temperature sensor and a displacement sensor, which are used to measure the oil film pressure, temperature and oil film thickness respectively.

[0009] In some embodiments of the present disclosure, a variable frequency drive module is also included, and the number of the variable frequency drive modules is not less than that of the liquid viscosity drive modules.

[0010] In some embodiments of the present disclosure, the variable frequency drive module includes a variable frequency motor, a power output shaft of the variable frequency motor is connected to a gear via a reducer, and the gear is meshed with a ring gear.

[0011] In some embodiments of the present disclosure, there is also included an installation component installed between the ring gear and the gear, which is used to install the liquid viscosity drive module and the variable frequency drive module. The installation component includes an annular frame mounted inside the cutter disc, and a gear box installed on the annular frame. A plurality of gear mounting holes are penetrated through the annular frame, and at least one slide rail is arranged next to the gear mounting holes. The gear box includes a box body, and a slide groove that matches the shape and position of the slide rail is arranged at the bottom of the box body.

[0012] The beneficial effects of the utility model are:

[0013] The speed control device can automatically adjust the speed and torque according to changes in geological conditions, allowing the TBM to adapt to different geological environments.

[0014] The combined use of the liquid-viscous clutch and the flywheel can reduce the impact caused by geological changes and improve the overall operating stability.

[0015] By adjusting the fluid-viscous clutch, additional torque can be provided when needed to help the TBM overcome a stuck machine or other obstacles.

[0016] The variable frequency drive module can adjust the motor's operating speed according to actual needs and optimize excavation efficiency.

[0017] The real-time monitoring function of the oil film parameter sensor can ensure the optimal state of the oil film and make timely adjustments to prevent equipment failure.

[0018] The variable frequency drive module can adjust the power output according to actual working requirements to avoid unnecessary energy consumption.

[0019] By reducing shock and improving control accuracy, speed control devices help reduce operating risks and improve construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the speed regulating device used for the TBM card machine;

[0021] Figure 2 This is a front view of the speed regulating device used for the TBM card machine;

[0022] The names of the components in the figure are: 1. TBM cutter head; 2. Ring gear; 3. Liquid-viscous clutch; 4. Flywheel; 5. Constant speed motor; 6. Reducer; 7. First gear; 8. Frequency conversion motor; 9. Reducer; 10. Second gear; 11. Ring frame; 12. Gear box; 13. Box body; 14. Slide. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example

[0024] This example discloses a speed regulating device for a TBM card machine, see Figures 1 to 2 , installed on the gear ring 2 of the TBM cutter head 1, the speed regulating device includes a plurality of liquid viscous drive modules, the liquid viscous drive module includes a liquid viscous clutch 3, one end of the liquid viscous clutch 3 is connected to the power output shaft of the constant speed motor 5 through a flywheel 4 capable of storing energy, and is used to increase the escape torque in the TBM stuck state and reduce the impact stiffness during the escape process, and the other end of the liquid viscous clutch is connected to the first gear 7 through a reducer 6, and the first gear 7 is meshed with the gear ring 2;

[0025] The liquid-viscous clutch comprises a friction disc, on which an oil film parameter sensor is mounted, a signal collection output end of the oil film parameter sensor is connected to an industrial computer, and a control signal output end of the industrial computer is connected to a constant speed motor.

[0026] The oil film parameter sensors include pressure sensors, temperature sensors and displacement sensors, which are used to measure the oil film pressure, temperature and oil film thickness respectively.

[0027] It also includes variable frequency drive modules, and the number of variable frequency drive modules is not less than that of liquid viscosity drive modules.

[0028] The variable frequency drive module includes a variable frequency motor 8 , a power output shaft of the variable frequency motor 8 is connected to a second gear 10 via a reducer 9 , and the second gear 10 is meshed with the ring gear 2 .

[0029] It also includes an installation component installed between the ring gear and the gear, which is used to install the liquid viscosity drive module and the variable frequency drive module. The installation component includes a circular frame 11 mounted in the cutter disc, and a gear box 12 installed on the circular frame 11. A plurality of gear mounting holes 13 are penetrated on the circular frame 11, and at least one slide rail 14 is arranged next to the gear mounting holes 13. The gear box 12 includes a box body 15, and a slide groove 16 that matches the slide rail 14 in shape and position is arranged at the bottom of the box body 15.

[0030] During operation, the oil film parameter sensor monitors the pressure, temperature and thickness of the oil film in real time, and transmits the data to the industrial computer. The industrial computer adjusts the working state of the fluid-viscous clutch and the variable frequency motor according to the sensor data and the preset program to optimize the excavation efficiency and machine performance. According to the changes in geological conditions, the speed control device automatically adjusts to maintain the best excavation speed and torque. The fluid-viscous clutch and the reducer work together to distribute power to the first gear, which is then transmitted to the cutterhead ring gear. The variable frequency motor outputs the adjusted torque to the second gear through the reducer, which meshes with the cutterhead ring gear. The two transmission gears jointly drive the ring gear to rotate, thereby driving the cutterhead to rotate. The variable frequency drive is the driving mode under normal working conditions, and the fluid-viscous drive mode is used for TBM cutterhead escape conditions. In order to increase the breakaway torque of the TBM cutter drive system and reduce the installed power of the variable frequency drive module, a large inertia energy storage flywheel is added between the hydroviscous clutch and the constant speed motor in the hydroviscous drive module. Before breaking away, the motor is first driven to rotate the flywheel at high speed, and then the output breakaway torque is controlled by controlling the contact speed of the friction disc of the hydroviscous speed regulating clutch. Among them, the flexible effect of the hydroviscous oil film can buffer the impact caused by the instantaneous acceleration of the rigid drive. During the breakaway process, it is necessary to coordinate the control of the inverter control frequency and the hydroviscous clutch control oil pressure so that the hydroviscous drive module and the variable frequency drive module always maintain synchronous movement. The cutterhead liquid-viscous drive module structure and its driving and escape working principles are as follows: Under normal TBM excavation conditions, the friction plate of the liquid-viscous speed control clutch is always in a disengaged state; when the TBM cutterhead is stuck and needs to enter the escape mode, the fixed-speed motor first drives the flywheel and drives the liquid-viscous clutch active shaft to rotate at high speed to store a large amount of mechanical energy, and then controls the oil film thickness between the friction plates by controlling the oil pressure in the piston chamber, thereby converting the flywheel energy storage into instantaneous torque to act on the cutterhead, driving the cutterhead to overcome the resistance of the surrounding rock and re-enter the excavation state.

[0031] Although some preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present invention.

[0032] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of this application and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A speed regulating device for a TBM clamping machine, installed on the gear ring of a TBM cutter head, characterized in that: It includes a plurality of hydraulic viscous drive modules, wherein the hydraulic viscous drive module includes a hydraulic viscous clutch, one end of the hydraulic viscous clutch is connected to the power output shaft of the constant speed motor via a flywheel capable of storing energy, so as to increase the escape torque in the TBM stuck state and reduce the impact stiffness during the escape process, and the other end of the hydraulic viscous clutch is connected to a gear via a reducer, and the gear is meshed with a gear ring; The hydroviscous clutch comprises a friction disc, an oil film parameter sensor is mounted on the friction disc, a signal collection output end of the oil film parameter sensor is connected to an industrial computer, and a control signal output end of the industrial computer is connected to a constant speed motor.

2. The speed regulating device for a TBM card machine according to claim 1, characterized in that: The oil film parameter sensor comprises a pressure sensor, a temperature sensor and a displacement sensor, which are used to measure the oil film pressure, temperature and oil film thickness respectively.

3. The speed regulating device for a TBM card machine according to claim 1, characterized in that: It also includes variable frequency drive modules, and the number of the variable frequency drive modules is not less than that of the liquid viscosity drive modules.

4. The speed regulating device for a TBM clamping machine according to claim 3, characterized in that: The variable frequency drive module comprises a variable frequency motor, a power output shaft of the variable frequency motor is connected to a gear via a reducer, and the gear is meshed with a gear ring.

5. The speed regulating device for a TBM card machine according to claim 1, characterized in that: It also includes an installation component installed between the ring gear and the gear, which is used to install the liquid viscosity drive module and the variable frequency drive module. The installation component includes an annular frame sleeved in the cutter disc, and a gear box installed on the annular frame. A plurality of gear mounting holes are arranged through the annular frame, and at least one slide rail is arranged next to the gear mounting holes. The gear box includes a box body, and a slide groove that matches the shape and position of the slide rail is arranged at the bottom of the box body.

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