Dual-power system of heading machine

Abstract

The utility model discloses a double-power system of a heading machine, which comprises a first power module and a second power module, the first power module and the second power module are respectively provided with an independent power supply system, and the independent power supply systems are respectively connected with a pump set through a transfer case and are used for alternately supplying energy to the heading machine; wherein the first power module comprises an engine and a clutch; the second power module comprises a motor. According to two sets of power modes, an electric working mode can be mainly used during tunneling operation in a tunnel, tail gas emission is avoided, the ventilation demand is small, energy conservation and environmental protection are achieved, when external power connection is not convenient, an engine working mode can be adopted for operation or walking, and flexibility and convenience are achieved. Meanwhile, the engine and the motor are arranged in parallel relative to the transfer case, one input shaft is converted into a plurality of output shafts through the transfer case, power parallel drive output of the multiple hydraulic pumps is achieved, the structure is simple and compact, the length size of a power system of the heading machine is effectively shortened, and the heading machine is better suitable for being used in a small tunnel.

Description

Technical Field

[0001] This utility model belongs to the technical field of tunnel engineering equipment, specifically, it relates to a dual power system for a tunnel boring machine. Background Technology

[0002] Currently, the power systems of tunneling machines or large excavators can be roughly divided into four categories:

[0003] 1) Diesel engine single-power drive technology

[0004] The entire machine is powered by a single diesel engine. The power system structure is as follows: the diesel engine is connected to a hydraulic pump via a coupling. The hydraulic pump can be a single pump or multiple pumps connected in series. The hydraulic pump is connected to the oil tank and the main valve via inlet and outlet oil pipes, respectively. The rotation of the diesel engine drives the hydraulic pump to rotate, drawing hydraulic oil from the oil tank and providing power to the actuators through the main valve.

[0005] Disadvantages: Single-power drive, engine operation emits exhaust fumes and noise, polluting the environment, especially when working in tunnels where air circulation is poor, which is detrimental to the health of operators.

[0006] 2) Single-power motor drive technology

[0007] Similar to a single-power drive system using a diesel engine, the diesel engine is replaced with an electric motor. The remaining components are similar, with the electric motor driving the pump set to provide power to the hydraulic system.

[0008] Disadvantages: If battery power is used, the batteries are heavy, take a long time to charge, and are bulky, making them unsuitable for large equipment; if cable power is used, the cable length is limited, which is not conducive to the equipment's long-distance relocation.

[0009] 3) Separate diesel-electric dual-power drive

[0010] It has both power systems 1 and 2 mentioned above. There is no power connection between the two systems. The diesel engine and the electric motor drive a pump set respectively. When working in the tunnel, the electric motor is used for drive, and when moving to another location, the diesel engine is used for drive. It is not limited by the length of the cable.

[0011] Disadvantages: The two power systems are equipped with two pump sets, resulting in a large volume, numerous oil pipes, and a less compact structure.

[0012] Therefore, there is an urgent need for a completely new power system for tunneling machines or large excavators to cope with more complex engineering scenarios that require higher efficiency. Utility Model Content

[0013] In view of this, the present invention provides a dual power system for a tunneling machine to solve the above problems.

[0014] To solve the above technical problems, this utility model provides...

[0015] A dual-power system for a tunneling machine, comprising:

[0016] The first and second power modules are independently configured and connected to the pump set via transfer cases, respectively, to alternately supply power to the tunneling machine; among them...

[0017] The first power module includes an engine and a clutch; the second power module includes an electric motor.

[0018] As an alternative, the first power module and the second power module are connected to the transfer case via couplings.

[0019] As an alternative, the transfer case is equipped with multiple output terminals, each of which is connected to at least one hydraulic pump.

[0020] As an optional feature, the output of the transfer case is also connected to a generator, which is connected in series with any power module.

[0021] As an alternative, in the first power module, the engine output is connected to the clutch, and the clutch is connected to the transfer case via a coupling.

[0022] As an alternative, in the second power module, the output of the motor is connected to the transfer case via a coupling.

[0023] As an alternative, the first power module and the second power module operate alternately; when the engine is running, the clutch remains closed; when the electric motor is running, the clutch remains open.

[0024] As an alternative, the other end of the engine is connected to a control system, which is equipped with a control valve group to control the clutch status.

[0025] As an alternative, the control valve assembly includes a clutch control valve electrically connected to the clutch.

[0026] As an alternative, the coupling is a flexible coupling.

[0027] The beneficial effects of the utility model are:

[0028] This invention features two power modes. The electric mode is primarily used during tunnel excavation, resulting in zero exhaust emissions, low ventilation requirements, and energy efficiency. When external power is unavailable, the engine mode can be used for operation or movement, offering flexibility and convenience. Furthermore, the engine and motor are connected in parallel relative to the transfer case. The transfer case transforms one input shaft into multiple output shafts, enabling parallel drive output from multiple hydraulic pumps. This design is simple and compact, effectively shortening the length of the tunneling machine's power system and making it better suited for use in small tunnels. Attached Figure Description

[0029] Figure 1 A schematic diagram of the functional modules of the dual power system of the tunneling machine provided in this embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of a dual-power system module structure for a tunneling machine, provided as an embodiment of the present invention.

[0031] Figure labels and their correspondences:

[0032] 1-Engine, 2-Clutch, 3-First coupling, 4-Motor, 5-Second coupling, 6-Transfer case, 7-Hydraulic pump, 8-Generator, 9-Clutch control valve, 10-Control system. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0034] Please see Figure 1 , Figure 1 A dual-power system for a tunneling machine provided in this embodiment includes:

[0035] The first power module and the second power module each have independent power supply systems, and are respectively connected to the pump group through the transfer box 6 for alternating power supply to the tunneling machine; among them;

[0036] The first power module includes an engine 1 and a clutch 2; the second power module includes an electric motor 4.

[0037] In this embodiment, the output end of the engine 1 of the first power module is connected to the clutch 2, and the clutch 2 is connected to the transfer case 6 via the first coupling 3. In one scenario, the positions of the clutch 2 and the coupling can be interchanged, but this embodiment does not impose any restrictions.

[0038] The motor 4 of the second power module is connected to another shaft of the transfer case 6 via the second coupling 5. In this way, the engine 1 and the motor 4 are connected in parallel with respect to the transfer case 6, allowing for alternating power supply to the tunneling machine for different implementation scenarios.

[0039] Optionally, the transfer case 6 has multiple output terminals, allowing the installation of multiple hydraulic pumps 7 to form a pump group; the hydraulic pumps 7 can be connected to different output shafts of the transfer case 6, or they can be connected in series. A generator 8 can be installed on the transfer case 6, which can be driven by either the engine 1 or the motor 4; the generator 8 is electrically connected to the battery, and under the drive of the transfer case 6, the generator 8 charges and stores energy in the battery, which then powers normal lighting, air conditioning, and other equipment.

[0040] With the above connection configuration, engine 1 and motor 4 do not operate simultaneously. When engine 1 is operating, clutch 2 is engaged, motor 4 is not powered, and engine 1 drives hydraulic pump 7 and generator 8 to rotate via transfer case 6. At this time, the shaft of motor 4 follows suit. Clutch 2 is electrically controlled. When motor 4 is operating, engine 1 is not operating, clutch 2 is disengaged, and motor 4 powers hydraulic pump 7 and generator 8 via transfer case 6. At this time, engine 1 does not rotate.

[0041] Furthermore, engine 1 is connected to control system 10, and control system 10 is equipped with a control valve assembly, which includes a clutch 2 control valve connected to clutch 2. Optionally, a flexible coupling is used to effectively reduce impact and provide buffering and vibration damping.

[0042] Thus, based on the configuration of this embodiment, when the tunneling machine is moved to a new location or when it is inconvenient to connect to an external power source, the engine 1 operating mode is used, and the control system 10 controls the clutch 2 to close. When an external power supply is available, the electric operating mode is used, the motor 4 is connected to the external power source, the engine 1 is not working, the clutch 2 is disengaged, the motor 4 drives the transfer case 6, and the hydraulic pump 7 at the output end of the transfer case 6 works to provide power for the tunneling machine's movement and loading operations. During tunneling operations inside the tunnel, the electric operating mode is mainly used, resulting in no exhaust emissions, low ventilation requirements, energy saving, and environmental protection. When external power is inconvenient, the engine 1 operating mode can be used for operation or movement, offering flexibility and convenience. Simultaneously, the engine 1 and motor 4 are connected in parallel relative to the transfer case 6. The transfer case 6 transforms one input shaft into multiple output shafts, realizing the parallel drive output of multiple hydraulic pumps 7. The structure is simple and compact, effectively shortening the length of the tunneling machine's power system and better adapting to use in small tunnels.

[0043] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A dual-power system for a tunneling machine, characterized in that, include: The first power module and the second power module are independently configured and are respectively connected to the pump group through a transfer case (6) for alternately supplying power to the tunneling machine; wherein, The first power module includes an engine (1) and a clutch (2); the second power module includes an electric motor (4).

2. The dual-power system for a tunneling machine according to claim 1, characterized in that, The first power module and the second power module are respectively connected to the transfer case (6) via couplings.

3. The dual-power system for a tunneling machine according to claim 1, characterized in that, The transfer case (6) is provided with multiple output terminals, and at least one hydraulic pump (7) is connected to each output terminal.

4. The dual-power system for a tunneling machine according to claim 3, characterized in that, The output end of the transfer case (6) is also connected to a generator (8), which is connected in series with any power module.

5. A dual-power system for a tunneling machine according to claim 1, characterized in that, In the first power module, the output end of the engine (1) is connected to the clutch (2), and the clutch (2) is connected to the transfer case (6) through a coupling.

6. The dual-power system for a tunneling machine according to claim 1, characterized in that, In the second power module, the output end of the motor (4) is connected to the transfer case (6) via a coupling.

7. A dual-power system for a tunneling machine according to claim 1, characterized in that, The first power module and the second power module operate alternately; when the engine (1) is working, the clutch (2) remains closed; when the motor (4) is working, the clutch (2) remains open.

8. A dual-power system for a tunneling machine according to claim 5, characterized in that, The other end of the engine (1) is connected to the control system (10), which is equipped with a control valve group for controlling the state of the clutch (2).

9. A dual-power system for a tunneling machine according to claim 8, characterized in that, The control valve assembly includes a clutch (2) control valve, which is electrically connected to the clutch (2).

10. A dual-power system for a tunneling machine according to claim 2, characterized in that, The coupling is a flexible coupling.

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