Cooling system of direct-drive type electro-hydraulic servo crystallizer vibration control device

Abstract

The invention relates to a cooling system of direct-drive type electro-hydraulic servo crystallizer vibration control device and belongs to the technical field of continuous casting crystallizer vibration. The cooling system comprises a driving mechanism, a bidirectional hydraulic pump, a low-pressure circulating pump set, a heat exchanger and a pressure oil tank, wherein the driving mechanism canperform drive control on the bidirectional hydraulic pump, so that the driving mechanism can forwards rotate to drive an oil outlet A of the bidirectional hydraulic pump to discharge oil and an oil suction opening C to suck oil; the driving mechanism can backwards rotate to drive an oil outlet B of the bidirectional hydraulic pump to discharge oil and the oil suction opening C to suck oil; the low-pressure circulating pump set can suck low-temperature oil liquid from the pressure oil tank and send the low-temperature oil into W1 to cool the bidirectional hydraulic pump; meanwhile, the low-temperature oil is supplemented into an inner shell body through the oil suction opening C, and high-temperature oil can flow out of a W2 opening to enter the heat exchanger for being cooled and then enters the pressure oil tank. According to the cooling system disclosed by the invention, a pressure closed-loop circulating cooling mode is utilized, and heat of a hydraulic pump body and the system canbe brought away by the low-temperature oil liquid; thus, a requirement for long-time continuous operation of a direct-drive type electro-hydraulic servo crystallizer vibration control device can be met.

Description

technical field [0001] The invention belongs to the technical field of continuous casting crystallizer vibration, and in particular relates to a cooling system of a direct-drive electro-hydraulic servo crystallizer vibration control device. Background technique [0002] As the key equipment of the continuous casting machine, the crystallizer vibration device is used to ensure that the casting slab and the copper wall of the mold do not bond during the casting process through the vibration of the mold, and to obtain a good surface quality of the slab. The existing crystallizer vibration devices are divided into mechanical vibration, hydraulic servo vibration and electric cylinder vibration according to the driving control form. The mechanical crystallizer vibration device usually uses a rotating motor and an eccentric wheel linkage mechanism to achieve sinusoidal vibration. Its disadvantages are severe mechanical wear, difficulty in achieving non-sinusoidal vibration, and vib...

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Problems solved by technology

Since the working characteristics of the crystallizer vibration device are continuous and uninterrupted work, the vibration frequency is 200 times / min to 350 times / min, the servo motor drives the two-way hydraulic pump to rotate forward and reverse quickly, the internal leakage of the hydraulic pump and the high-speed rotation of the bearing It will lead to a sharp rise in the internal temperature of the hydraulic pump body. According to the test, the maximum temperature can reach above 100°C; at the same time, the external environment temperature of the crystallizer vibration device installed on the continuous casting production line is relatively high, usually above 40°C; the temperature is too high , will increase the leakage of the hydraulic pump, and at the same time affect the system performance, damage the seals in the hydraulic transmission system, and greatly reduce the life of the system. Requirements for reliable operation

None of the currently published patents provides a cooling system for a direct-drive electro-hydraulic servo crystallizer vibration control device

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