Main driving mechanism of six-arm cutterhead used for shield machine

Abstract

The invention discloses a main driving mechanism of a six-arm cutterhead used for a shield machine. The main driving mechanism comprises a shield machine cutterhead and a main driving mechanism. The main driving mechanism is characterized by mainly comprising a synchronous variable frequency motor (1), a gear device (2) and a main bearing (3), wherein the output end of the variable frequency motor (1) is tightly 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; the main bearing (3) is connected with a shield machine cutterhead by connected flanges (4); the upper part of the main bearing is provided with a sealing assembly (5); the synchronous variable frequency motor (1) is provided with brake; and the variable frequency motor (1), the gearing device (2) and the main bearing (3) are connected to form a dismountable integral structure. In the invention, the synchronous variable frequency motor serves as a driving mode, full-amount torque can be reached when speed is regulated within a range from 0 to 50Hz, and the main driving mechanism has the beneficial effect of small starting current, high efficiency and small noise harm and is simple to maintain.

Description

technical field [0001] The invention 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 [0002] 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 th...

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Problems solved by technology

[0003] The purpose of the present invention 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 main six-arm cutter head for shield machines that is easy to maintain, less harmful to noise, and greatly improves the environment of the operating platform. Drive mechanism

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