Hydraulic system of AWC servo device

Abstract

The invention provides a hydraulic system of an AWC servo device. The hydraulic system of the AWC servo device comprises an oil inlet pipeline, an oil return pipeline and an oil drainage pipeline, wherein a third high-pressure ball valve, a high-pressure filter and a first one-way valve are mounted on the oil inlet pipeline; the tail end of the oil inlet pipeline is divided into two channels; one channel is connected to a first rod cavity oil tube while the other channel is connected to a second rod cavity oil tube; a second one-way valve is arranged on the oil return pipeline; the tail end of the oil return pipeline is divided into three channels; the first channel is connected to a first rodless cavity oil tube; the second channel is connected to a second rodless cavity oil tube; the third channel is connected to a third rodless cavity oil tube; the oil drainage pipeline is provided with a fourth high-pressure ball valve; and a first solenoid directional valve and a pilot operated check valve which are connected in parallel are arranged between the oil drainage pipeline and the oil inlet pipeline. By the hydraulic system of the AWC servo device, control loops of a vertical roll balancing cylinder are integrated together; the system integration degree is high; combination control and adjustment are facilitated; matched pipelines of equipment are reduced; and unnecessary pipeline leakage points are avoided.

Description

technical field [0001] The invention belongs to the field of hydraulic systems, in particular to a hydraulic system of an AWC servo device. Background technique [0002] AWC is the English abbreviation of Automatic Width Control (Automati Width Control). The AWC servo device is located on both sides of each vertical roller mill. When the vertical roller mill is working, the width needs to be adjusted through the AWC servo device, so as to provide width guarantee for the steel plate quality of the rolling production line. In the context of today's society, AWC servo devices have become the mainstream, and its technology is gradually improving, and its work is more stable. Although it is more expensive to manufacture and has higher requirements on the cleanliness of the oil, it is more cost-effective when considered comprehensively. The AWC servo device is jointly controlled by hydraulic pressure and electricity, but there are some problems in the existing system: 1. The serv...

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Problems solved by technology

The AWC servo device is jointly controlled by hydraulic pressure and electricity, but there are some problems in the existing system: 1. The servo valve itself has internal leakage, and the servo cylinder may malfunction due to the internal leakage of the servo valve; 2. Since the hydraulic station is far away from the servo cylinder , the pressure in the rod cavity of the servo cylinder directly provided by the hydraulic station will slow down the response speed and inaccurate control

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