CN202284474U - Main driving mechanism of six-arm cutting disk for shield machine - Google Patents

Abstract

The utility model discloses a main drive mechanism of a six-arm cutter head for a shield machine, which includes a shield machine cutter head and a main drive mechanism, and is characterized in that the main drive mechanism is mainly composed of a synchronous frequency conversion motor (1), a gear device (2) and a The main bearing (3) is formed, the output end of the variable frequency motor (1) is closely connected with the input end of the gear device (2), and the output end of the gear device (2) is connected with the main bearing (3) to drive the main bearing (3) to rotate , the main bearing (3) is connected to the cutter head of the shield machine through the connecting flange (4), and a sealing assembly (5) is arranged on the upper part of the main bearing (3); the synchronous frequency conversion motor (1) has The brake, the synchronous variable frequency motor (1), the gear device (2) and the main bearing (3) are connected to form a detachable integrated structure. The utility model adopts a synchronous frequency conversion motor as a driving mode, and the speed regulation can reach full torque in the range of 0-50 Hz, and has the beneficial effects of small starting current, high efficiency, simple maintenance and low noise hazard.

Description

The main driving mechanism of the six-arm cutter head for shield machine

technical field

The utility model relates to a driving device of a cutter head, in particular to a main driving mechanism of a six-arm cutter head for a shield machine. It belongs to the field of excavation machinery.

Background technique

At present, the cutterhead drive devices used on the market usually adopt hydraulic drive devices, which are mainly composed of hydraulic pump stations, valve block groups, pipelines, driving hydraulic motors, reducers, large and small gears, main bearings and seals, etc., hydraulic motor drives The cutter head rotates, and the speed and torque of the cutter head are regulated by the oil supply pressure and flow rate of the hydraulic system. The device has the characteristics of small size, convenient speed adjustment of the cutter head and overload protection. However, this device still has the following disadvantages: 1) The hydraulic components require high manufacturing precision due to the high technical requirements of the components and the difficulty in assembly, and the use and maintenance are relatively strict; Therefore, it is not suitable to work in a high or low temperature environment; 3) Since the oil pipe is used to transmit the pressure oil, there will inevitably be leakage and pressure loss on the relative moving surface; 4) The air mixed in the oil will easily affect the working performance , when the oil is mixed with air, it is easy to cause crawling, vibration and noise, which will affect the working performance of the system; 5) The oil is easy to be polluted, and the reliability of the system will be affected after the oil is polluted; 6) It is not easy to break down Check and rule out. Therefore, it is necessary to develop a new driving device to solve these problems.

Utility model content

The purpose of this utility model is to solve the problem of hydraulic oil leakage polluting the internal working environment of the machine in the prior art, and to provide a six-arm cutter head for shield machines that is easy to maintain, has low noise hazards, and greatly improves the environment of the operating platform. main drive mechanism.

The purpose of this utility model can be achieved through the following technical solutions:

The main drive mechanism of the six-arm cutter head for the shield machine includes the cutter head of the shield machine and the main drive mechanism. Its structural features are:

1) The main drive mechanism is mainly composed of several synchronous variable frequency motors, gear devices and main bearings, the output end of the frequency conversion motors is closely connected with the input end of the gear device, and the output end of the gear device is connected with the main bearing to drive the main The bearing rotates, the main bearing is connected to the shield machine cutter head through the connecting flange, and a sealing assembly is arranged on the upper part of the main bearing;

2) The synchronous variable frequency motor is equipped with a brake, and the synchronous variable frequency motor, the gear device and the main bearing are connected to form a detachable integrated structure.

The purpose of this utility model can also be achieved through the following technical solutions:

One embodiment of the present invention is: a gearbox and a cooling device are provided at the connection between the synchronous frequency conversion motor and the gear device; wherein, the output shaft of the frequency conversion motor is connected to the gearbox through the cooling device, and the output end of the gearbox is connected to Spherical bearings for gear units.

An embodiment of the utility model is: the synchronous variable frequency motor may include a motor body and a frequency converter, a torque speed sensor is installed on the output shaft of the motor body, and an industrial computer is connected between the frequency converter and the sensor.

An embodiment of the utility model is that: 6 to 10 synchronous variable frequency motors can be provided.

An embodiment of the utility model is: the flange can be installed on the main bearing through bolts.

An embodiment of the present invention is that: the main driving mechanism may also include a lubricating component.

The utility model has the following outstanding beneficial effects:

1. Since the utility model adopts the synchronous frequency conversion motor device and the frequency conversion circuit as the driving mode, the speed regulation can reach the full torque in the range of 0-50Hz, and the motor power is constant, so it has the advantages of small starting current and high efficiency. The adjustment loop The reflection is good, the maintenance is simple, the noise is small, and the cooling device can be installed on the motor to improve the ambient temperature.

2. The utility model is convenient for the use and maintenance of the shield machine. When changing the cutter, the cutter head rotation can be stopped at a specified angle at any time, and the rotation direction of the cutter head can be changed by changing the phase sequence, which improves the overall performance of the shield machine .

3. The utility model can be modified according to the characteristics of different cutterheads and the structural characteristics of the frequency conversion motor, thereby improving the safety factor of the cutterhead structure.

Description of drawings

Fig. 1 is a schematic diagram of the planar structure of the utility model.

Fig. 2 is a schematic diagram of the connection of the synchronous variable frequency motor, the gear and the main bearing of the utility model.

Fig. 3 is a driving principle diagram of the synchronous variable frequency motor of the present invention.

Among them, 1-synchronous frequency conversion motor, 2-gear device, 3-main bearing, 4-connecting flange, 5-sealing assembly, 6-gearbox, 7-cooling device, 8-spherical bearing.

Detailed ways

Specific embodiment 1:

Fig. 1 and Fig. 2 constitute the specific embodiment 1 of the present utility model.

Referring to Fig. 1 and Fig. 2, this embodiment includes a shield machine cutter head and a main drive mechanism, the main drive mechanism is mainly composed of several synchronous frequency conversion motors 1, gear devices 2 and main bearings 3, the output end of the frequency conversion motor 1 It is closely connected with the input end of the gear device 2, the output end of the gear device 2 is connected with the main bearing 3 and drives the main bearing 3 to rotate, and the main bearing 3 is connected with the cutter head of the shield machine through the connecting flange 4. The upper part of the main bearing 3 is provided with a sealing assembly 5; the synchronous frequency conversion motor 1 has a brake, and the synchronous frequency conversion motor 1, the gear device 2 and the main bearing 3 are connected to form a detachable integrated structure. A gearbox 6 and a cooling device 7 are provided at the connection between the synchronous variable frequency motor 1 and the gear unit 2; wherein, the output shaft of the variable frequency motor 1 is connected to the gearbox 6 through the cooling device 7, and the output end of the gearbox 6 is connected to the gear unit 2. Spherical bearing 8.

In this embodiment, the synchronous variable frequency motor 1 may include a motor body 1-1 and a frequency converter 1-2, a torque speed sensor 1-3 is installed on the output shaft of the motor body 1-1, and the frequency converter 1-2 and An industrial computer 1-4 is connected between the sensors 1-3. The synchronous variable frequency motor 1 can be provided with 6, 7, 8, 9 or 10 sets according to the structure of the cutter head of the shield machine. The flange 4 can be installed on the main bearing 3 by bolts. The primary drive mechanism may also include a lubrication assembly. The gear unit 2 can consist of a single gear or a gear set.

The driving principle of synchronous variable frequency motor:

Referring to Fig. 3, the synchronous variable frequency motor 1 comprises a motor body 1-1 and a frequency converter 1-2, a torque speed sensor 1-3 is installed on the output shaft of the motor body 1-1, and the frequency converter 1-2 and the sensor 1 -3 is connected with industrial computer 1-4. The output torque T and the rotating speed n measured by the torque speed sensor 1-3 are sent to an industrial computer (industrial control computer, a conventional industrial programmable control computer PLC can be used), and the output power P of the motor is calculated, and the output power P Do the difference calculation with the rated power Po of the motor △P=P-Po, and then give the control signal u according to a certain control rate by the power deviation ΔP, and adjust the torque and speed of the motor with constant power. The role of the gearbox 6 The cutter head is driven by the gear device 2; the current and motor torque are compared between each inverter 1-1 through PLC (Programmable Logic Controller), which can prevent the current difference of the motor from being too large and prevent the motor from unbalanced load If it is too large, the motor will always run safely in phase steps near the rated power, so as to achieve the purpose of high efficiency and energy saving.

Working principle of the utility model:

The working principle of the utility model is illustrated below with the six-arm cutterhead as an example. Since the main drive mechanism of the cutter head is located between the cutter head and the front shield of the shield machine, the main drive mechanism as a whole is firmly connected to the flange of the pressure-bearing partition of the front shield by bolts, and at the same time, the method of connecting the cutter head Lan is connected to the flange of the cutter head with multiple (for example, 88) bolts, so that the cutter head can reach the full torque in the range of 0-50Hz in the clockwise and counterclockwise directions, so that the motor power is constant, and the cutter head After the drive is driven by 8 synchronous synchronous frequency conversion motors, the gear device 2 starts to rotate, and then drives the main bearing to rotate, and the flange connected to the main bearing through bolts also rotates, thereby driving the cutter head to rotate. According to the characteristics of the six-arm cutter head and the structural characteristics of the synchronous variable frequency motor, the diameter is increased from 2.6m to 3m, and the flange connected to the cutter head is also correspondingly enlarged, which improves the safety factor of the entire cutter head structure.

As mentioned above, the utility model only takes the six-arm cutterhead as an example, but the scope of protection of the utility model is not limited thereto, and the utility model can also adapt to six-arm and four-arm cutterhead Therefore, any equivalent replacement or change according to the technical solution and concept of the utility model shall belong to the protection scope of the utility model.

Claims (6)

1. The main drive mechanism of the six-arm cutterhead for the shield machine, including the shield machine cutterhead and the main drive mechanism, is characterized in that: 1) The main drive mechanism is mainly composed of several synchronous variable frequency motors (1), gear devices (2) and main bearings (3), and the output ends of the variable frequency motors (1) are closely connected with the input ends of the gear devices (2) , the output end of the gear device (2) is connected to the main bearing (3) and drives the main bearing (3) to rotate, and the main bearing (3) is connected to the cutterhead of the shield machine through the connecting flange (4), The upper part of the main bearing (3) is provided with a sealing assembly (5); 2) The synchronous variable frequency motor (1) is equipped with a brake, and the synchronous variable frequency motor (1), the gear device (2) and the main bearing (3) are connected to form a detachable integrated structure. 2. The main drive mechanism of the six-arm cutterhead for the shield machine according to claim 1, characterized in that: a gearbox (6) is provided at the connection between the synchronous variable frequency motor (1) and the gear unit (2) ) and cooling device (7); wherein, the output shaft of the variable frequency motor (1) is connected to the gearbox (6) through the cooling device (7), and the output end of the gearbox (6) is connected to the spherical bearing (8) of the gear unit (2) ). 3. The main drive mechanism of the six-arm cutter head for shield machine according to claim 1 or 2, characterized in that: the synchronous variable frequency motor (1) includes a motor body (1-1) and a frequency converter (1-1) 2), a torque speed sensor (1-3) is installed on the output shaft of the motor body (1-1), and an industrial computer (1-3) is connected between the frequency converter (1-2) and the sensor (1-3) -4). 4. The main drive mechanism of the six-arm cutter head for shield tunneling machines according to claim 1 or 2, characterized in that 6 to 10 synchronous variable frequency motors (1) are provided. 5. The main driving mechanism of the six-arm cutter head for shield machine according to claim 1 or 2, characterized in that: the flange (4) is installed on the main bearing (3) by bolts. 6. The main driving mechanism of the six-arm cutterhead for the shield machine according to claim 1, characterized in that: the main driving mechanism also includes a lubricating component.

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