Hydraulic transmission system of cantilever heading machine

Abstract

The utility model provides a hydraulic transmission system of a cantilever heading machine, which is characterized in that two load-sensitive variable hydraulic pumps of a duplex hydraulic pump are respectively controlled by a hydraulic load-sensitive electric proportional multi-way reversing valve; a cutting arm lifting oil cylinder, a shovel plate lifting oil cylinder, a left side crawler walking motor, a cutting arm rotating oil cylinder, a rear support lifting oil cylinder and a right side crawler walking motor are driven; the output end of the diesel engine unit is sequentially connected with a manual clutch, an elastic coupler I and a transmission shaft at one end of a double-output-shaft motor in series, and the output end of a transmission shaft at the other end of the double-output-shaft motor is connected with a pump shaft of a duplex hydraulic pump through a coupler II. A diesel engine power driving mode is adopted, power connection and disconnection are carried out between the diesel engine and the double-output-shaft motor through the manual clutch, the structure is compact, a transmission chain is short, operation is easy, use is convenient, and the device is suitable for long-distance transition walking work of the cantilever heading machine.

Description

Technical Field

[0001] The utility model relates to the technical field of cantilever tunneling machine manufacturing, in particular to a hydraulic transmission system of a cantilever tunneling machine. Background Art

[0002] As a key equipment in tunneling construction, cantilever tunnel boring machines are currently widely used in construction fields such as engineering tunnels, coal mine tunnels, highway tunnels, railway tunnels, and water conservancy tunnels.

[0003] The actions of the actuators in the cantilever tunnel boring machine, such as crawler walking, cutting arm lifting, support cylinder lifting, shovel lifting, cutting arm rotation, etc., are mainly completed by the driving actions of the related actuators, hydraulic motors and hydraulic cylinders. The working power of the hydraulic motors and hydraulic cylinders comes from the hydraulic pump. The operation of the hydraulic pump generates a high-pressure oil source, which enters the corresponding hydraulic motor and hydraulic cylinder under the control of the hydraulic multi-way valve. The operation of the hydraulic pump requires mechanical energy to drive the pump shaft to rotate, thereby converting the mechanical energy into hydraulic energy, and further driving the actions of the above-mentioned actuators.

[0004] In the prior art, the source of mechanical energy for driving the pump shaft to rotate in the boom tunneling machine is the electric power system, that is, electricity is used to drive the motor, and then the motor drives the hydraulic pump.

[0005] Since the voltage level used by the cantilever tunnel boring machine is generally 1000V or 1140V, power transmission requires specially configured high-voltage power lines and devices, which must be connected to the cantilever tunnel boring machine by a high-voltage cable after passing through a transformer and a feeder switch. For this reason, the cantilever tunnel boring machine needs to carry and connect a high-voltage cable at all times, and manual assistance is required. At the tunneling construction site of the cantilever tunnel boring machine, due to construction conditions or construction process requirements, if it is necessary to alternate long distances between multiple construction sites or working surfaces, the cable length or fixed-mounted transformers and feeder switches will be difficult to meet the requirements and will no longer be able to provide power drive for the cantilever tunnel boring machine.

[0006] In order to solve the problem that the cantilever tunnel boring machine is difficult to drive with the original power supply during long-distance transfer, there are two main solutions used in the prior art: the first is to configure a set of diesel engine power generation equipment, and at the same time load the transformer, feeder switch and other equipment together and use the car to tow them, and move synchronously with the cantilever tunnel boring machine to power the cantilever tunnel boring machine equipment. The second is to configure a diesel engine driven hydraulic pump station, place it on an external mobile platform, and synchronously use hydraulic pipelines to connect to the original cantilever tunnel boring machine's travel hydraulic motor and the hydraulic system where the other actuators are located to drive the cantilever tunnel boring machine to travel. Most of these solutions have the problems of complex configuration system, high cost, complex cable or hydraulic pipeline connection, large workload, and complex operation. Therefore, a simpler and more feasible technical solution is urgently needed to solve this problem that has troubled the industry.

[0007] At the same time, the hydraulic pump drive motor of the traditional cantilever tunnel boring machine has a single output shaft, which is only used to connect the drive hydraulic pump and cannot be equipped with external power; the motor cooling method adopts air cooling, relying on the fan to circulate air to dissipate heat on the surface of the motor. The main disadvantages are: it occupies a large volume, requires a well-ventilated environment, and the heat dissipation capacity is reduced due to the increase in altitude. Utility Model Content

[0008] The purpose of the utility model is to provide a hydraulic transmission system for a cantilever tunneling machine, which adopts a diesel engine power drive mode, and uses a manual clutch between the diesel engine and the double-output shaft motor to connect and cut off the power. It has a compact structure, a short transmission chain, simple operation, and convenient use, and is suitable for the long-distance transfer and walking work of the cantilever tunneling machine.

[0009] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a hydraulic transmission system of a cantilever tunneling machine, including a double hydraulic pump, a diesel engine unit, a manual clutch, an elastic coupling I and a double-output shaft motor, wherein the two load-sensitive variable hydraulic pumps of the double hydraulic pump respectively drive the cutting arm lifting cylinder, the shovel lifting cylinder, the left crawler travel motor, the cutting arm rotation cylinder, the rear support lifting cylinder and the right crawler travel motor through the control of the hydraulic load-sensitive electric proportional multi-way reversing valve; the output end of the diesel engine unit is connected in series with the manual clutch, the elastic coupling I and one end transmission shaft of the double-output shaft motor in sequence, and the transmission shaft output at the other end of the double-output shaft motor is connected to the pump shaft of the double hydraulic pump through the coupling II.

[0010] Preferably, it also includes a control power supply and an electrical control system, and the double-shaft motor is also provided with an electrical connector for connecting to a high-voltage circuit.

[0011] Preferably, the dual-shaft motor is cooled by liquid cooling.

[0012] Preferably, the cutting arm rotary cylinder has a rod chamber equipped with a rotary cylinder back-pressure relief valve.

[0013] Preferably, a filter is provided between the duplex hydraulic pump and the load-sensitive variable hydraulic pump.

[0014] Preferably, the hydraulic load-sensitive electric proportional multi-way directional control valve has two modes: electric proportional control and manual control.

[0015] Preferably, the pump shafts of the two load-sensitive variable hydraulic pumps of the duplex hydraulic pump are connected in series.

[0016] Preferably, it also includes an oil tank for supplying oil to the duplex hydraulic pump.

[0017] Preferably, it also includes a controller and a remote controller, and the hydraulic load-sensitive electric proportional multi-way reversing valve is provided with a remote control signal receiving device for receiving remote controller signals.

[0018] The beneficial effects of the utility model are:

[0019] 1. Based on the electric control of the original hydraulic system of the boom tunnel boring machine, this hydraulic transmission system adopts a double-output shaft motor, adds a diesel engine unit drive part, and connects the diesel engine and the drive shaft of the double-output shaft motor through a clutch. In normal use, the electric drive mode is adopted to power the motor with on-site high-voltage electricity. When there is no power supply during long-distance transfer, the diesel engine power drive mode is adopted. A manual clutch is used between the diesel engine and the double-output shaft motor to connect and disconnect the power. The motor mode and the diesel engine drive mode can be switched quickly. It has a compact structure, a short transmission chain, simple operation, and is easy to use.

[0020] 2. The diesel engine drive part in the utility model can be integrated and installed in the cantilever tunneling machine body together with the original electric control hydraulic system, without the need for additional trailers, external mobile platforms, transformers, feeder switches, hydraulic pump stations, pipelines and other equipment. The system is simple, low-cost and requires little installation and connection work.

[0021] 3. In the further optimized solution, the double-shaft motor has added a power connection end, and the cooling method is liquid cooling, which can reduce the size of the motor, has high cooling efficiency, and is not affected by the altitude of use.

[0022] 4. In the further optimized solution, a back-pressure relief valve is installed in the rod chamber of the cutting arm rotary cylinder, which can reduce the fluctuation of the cylinder rotation speed caused by load fluctuation and increase the working stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of the utility model.

[0025] In the figure, 1. diesel engine unit, 2. manual clutch, 3. elastic coupling I, 4. double-output shaft motor, 5. coupling II, 6. load-sensitive variable hydraulic pump A, 7. load-sensitive variable hydraulic pump B, 8. oil tank, 9. filter A, 10. hydraulic load-sensitive electric proportional multi-way reversing valve A, 11. filter B, 12. hydraulic load-sensitive electric proportional multi-way reversing valve B, 13. cutting arm lifting cylinder, 14. shovel lifting cylinder, 15. left crawler travel motor, 16. cutting arm rotation cylinder, 17. rotation cylinder back pressure relief valve, 18. rear support lifting cylinder, 19. right crawler travel motor. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0028] At the same time, it should be noted that: unless otherwise defined, the technical terms or scientific terms used in this article should be the usual meanings understood by people with general skills in the technical field to which the utility model belongs. The meaning of "multiple" used in the patent application specification and claims of this utility model is two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front end", "rear end", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the utility model without substantial changes in the technical content.

[0029] The present invention is further described in detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0030] Embodiment 1:

[0031] The utility model discloses a hydraulic transmission system of a cantilever tunnel boring machine. Figure 1As shown, embodiment 1 includes a double hydraulic pump, a diesel engine unit 1, a manual clutch 2, an elastic coupling I3 and a double-output shaft motor 4, and also includes an oil tank 8 for supplying oil to the double hydraulic pump. The double hydraulic pump includes a load-sensitive variable hydraulic pump A6 and a load-sensitive variable hydraulic pump B7, and the pump shafts of the load-sensitive variable hydraulic pump A6 and the load-sensitive variable hydraulic pump B7 are connected in series. The load-sensitive variable hydraulic pump A6 drives the boom excavator cutting arm lifting cylinder 13, the shovel lifting cylinder 14, and the left crawler travel motor 15 through the control of the hydraulic load-sensitive electric proportional multi-way reversing valve A10, and the load-sensitive variable hydraulic pump B7 drives the boom excavator cutting arm rotation cylinder 16, the rear support lifting cylinder 18, and the right crawler travel motor 19 through the control of the hydraulic load-sensitive electric proportional multi-way reversing valve B12.

[0032] The output end of the diesel engine unit 1 is connected in series with the manual clutch 2, the elastic coupling I3 and one end of the transmission shaft of the double-output shaft motor 4 in sequence. The transmission shaft output of the other end of the double-output shaft motor 4 is connected to the pump shaft of the double hydraulic pump through the coupling II5 to provide power for the double hydraulic pump. When the manual clutch 2 operating handle is in the "closed" state, the power of the diesel engine unit 1 can be transmitted to the double-output shaft motor 4. When the manual clutch 2 operating handle is in the "disconnected" state, the transmission between the diesel engine unit 1 and the double-output shaft motor 4 is disconnected, and the power cannot be transmitted.

[0033] When the utility model is installed, the diesel engine unit 1, the manual clutch 2, the elastic coupling I3 and the double-output shaft motor 4, the coupling II5, the load-sensitive variable hydraulic pump A6, and the load-sensitive variable hydraulic pump B7 are directly connected and installed on the same axis, and the axis height is preferably set on the same horizontal line.

[0034] The two hydraulic pumps in the double hydraulic pump and the corresponding multi-way reversing valves, the hydraulic motor, the oil cylinder and the corresponding multi-way reversing valves are all connected through hydraulic pipelines and joints, etc. The specific connection method is the existing technology and will not be described in detail here.

[0035] The diesel engine 1 and the dual-output shaft motor 4 are both installed in the cantilever tunneling machine body, for example, they can be centrally installed on the frame of the cantilever tunneling machine at a position above one side of the crawler.

[0036] The hydraulic transmission system also includes a backup control power supply for providing energy and an electrical control system. The double-output shaft motor 4 is also provided with an electrical connector for connecting to a high-voltage circuit, such as an electrical connection plug.

[0037] When the boom tunnel boring machine is performing routine work, the clutch 2 is in the "disengaged" state, and the electrical connection plug on the dual-output shaft motor 4 is connected to the high-voltage circuit on site. After the dual-output shaft motor 4 is energized, its dual output shaft rotates, and the power drives the common pump shaft of the load-sensitive variable hydraulic pump A6 and the load-sensitive variable hydraulic pump B7 to rotate after passing through the coupling II5. The two hydraulic pumps respectively output high-pressure oil sources to generate hydraulic energy, which are respectively transmitted to related actuators through the corresponding hydraulic multi-way reversing valves.

[0038] When long-distance transfer is required and no high-voltage power supply is available, the double-output shaft motor 4 is disconnected from the relevant high-voltage circuit, and the diesel engine power drive mode is adopted: the backup control power supply is connected to the electrical control system to power the control circuit. Before the diesel engine 1 is started, the clutch 2 is first in the disengaged state. After the diesel engine 1 is started, the clutch 2 is operated to the "closed" state. The power output by the diesel engine 1 is transmitted to the pump shaft of the double hydraulic pump through the clutch 2, coupling I3, double-output shaft motor 4, and coupling II5, driving the hydraulic pump A6 and hydraulic pump B7 to rotate to generate a high-pressure oil source, so that the diesel engine 1 converts the heat energy of diesel combustion into mechanical energy, and finally converts it into hydraulic energy, which is transmitted to the original hydraulic system and related actuators, so that the cantilever tunneling machine can achieve long-distance transfer without power supply under the drive of the diesel engine power.

[0039] Embodiment 2:

[0040] The difference between this embodiment and embodiment 1 is that a filter is provided between the double hydraulic pump and the load-sensitive variable hydraulic pump, specifically, a filter A9 is provided between the load-sensitive variable hydraulic pump A6 and the hydraulic load-sensitive electric proportional multi-way reversing valve A10, and a filter B11 is provided between the load-sensitive variable hydraulic pump B7 and the hydraulic load-sensitive electric proportional multi-way reversing valve B12.

[0041] Embodiment 3:

[0042] The difference between this embodiment and the first embodiment is that it further includes a controller and a remote controller, and both multi-way reversing valves are provided with a remote control signal receiving device for receiving remote control signals.

[0043] Specifically, the utility model can control the current size and direction of the proportional solenoids in the two hydraulic multi-way reversing valves by operating the electrical control system or remote control, and then control the direction and flow of the hydraulic oil entering the corresponding hydraulic motor or cylinder, thereby controlling the movement direction and speed of the actuator hydraulic motor or cylinder.

[0044] Embodiment 4:

[0045] The difference between this embodiment and embodiment 3 is that the hydraulic load-sensitive electric proportional multi-way reversing valve A10 and the hydraulic load-sensitive electric proportional multi-way reversing valve B12 both have two functions: electric proportional control and manual control. If there is a problem with the circuit system, the hydraulic multi-way reversing valve can be directly controlled manually.

[0046] Both hydraulic multi-way reversing valves have manual operation function. Therefore, no matter it is the electric motor drive mode in normal use or the diesel power drive mode in long-distance transfer without power supply, the cantilever tunnel boring machine can be operated by electric control, remote control and manual control mode.

[0047] Embodiment 5:

[0048] The difference between this embodiment and the first embodiment is that the cutting arm rotary cylinder 16 has a rod chamber equipped with a rotary cylinder back pressure relief valve 17 to increase the working stability of the equipment.

[0049] Embodiment 6:

[0050] The difference between this embodiment and embodiment 1 is that the cooling method of the dual-output shaft motor 4 is liquid cooling, and the heat of the motor is taken away by the water-ethylene glycol type coolant provided from the outside. The coolant can be a special water-ethylene glycol type antifreeze coolant HEC-Ⅱ-25, which can work at minus 25°C without freezing, ensuring that the relevant components will not freeze and crack at cold temperatures, and there is no need to drain the internal coolant.

[0051] It should be noted that the parts not described in detail in the above embodiments are all prior art.

[0052] The above is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic transmission system for a cantilever tunnel boring machine, characterized in that: The invention comprises a double hydraulic pump, a diesel engine unit (1), a manual clutch (2), an elastic coupling I (3) and a double-output shaft motor (4); the two load-sensitive variable hydraulic pumps of the double hydraulic pump drive a cutting arm lifting cylinder (13), a shovel lifting cylinder (14), a left crawler travel motor (15), a cutting arm rotation cylinder (16), a rear support lifting cylinder (18) and a right crawler travel motor (19) respectively through the control of a hydraulic load-sensitive electric proportional multi-way reversing valve; the output end of the diesel engine unit (1) is connected in series with the manual clutch (2), the elastic coupling I (3) and one end of the transmission shaft of the double-output shaft motor (4); the transmission shaft output at the other end of the double-output shaft motor (4) is connected to the pump shaft of the double hydraulic pump through a coupling II (5).

2. The hydraulic transmission system of a boom tunnel boring machine according to claim 1, characterized in that: It also includes a control power supply and an electrical control system, and the double-output shaft motor (4) is also provided with an electrical connector for connecting to a high-voltage circuit.

3. The hydraulic transmission system of a boom tunneling machine according to claim 1, characterized in that: The dual-shaft motor (4) is cooled by liquid cooling.

4. The hydraulic transmission system of a boom tunneling machine according to claim 1, characterized in that: The cutting arm rotary oil cylinder (16) has a rod chamber equipped with a rotary oil cylinder back pressure relief valve (17).

5. The hydraulic transmission system of a boom tunneling machine according to claim 1, characterized in that: A filter is provided between the duplex hydraulic pump and the load-sensitive variable hydraulic pump.

6. The hydraulic transmission system of a boom tunneling machine according to claim 1, characterized in that: The hydraulic load-sensitive electric proportional multi-way reversing valve has two modes: electric proportional control and manual control.

7. The hydraulic transmission system of a boom tunnel boring machine according to claim 1, characterized in that: The pump shafts of the two load-sensing variable hydraulic pumps of the duplex hydraulic pump are connected in series.

8. The hydraulic transmission system of a boom tunneling machine according to claim 1, characterized in that: Also included is an oil tank (8) for supplying oil to the tandem hydraulic pump.

9. The hydraulic transmission system of a boom tunneling machine according to claim 1, characterized in that: It also includes a controller and a remote controller. The hydraulic load-sensitive electric proportional multi-way reversing valve is provided with a remote control signal receiving device for receiving remote controller signals.

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