Hydraulic control system for ocean engineering crane

Abstract

The invention discloses a hydraulic control system for an ocean engineering crane and belongs to the technical field of ocean engineering cranes. A main motor is connected with a main pump package; the oil outlet of the main pump package is communicated with the oil inlet of a reversing valve bank; the first oil outlet and the second oil outlet of the reversing valve bank are respectively communicated with two oil ports of a hydraulic motor through a balance valve bank; the oil return port of the reversing valve bank is communicated with the oil inlet of the main pump package; the hydraulic control system also comprises an oil supplement motor, an oil supplement pump and a hydraulic oil tank; the oil supplement motor is connected with the oil supplement pump; the oil inlet of the oil supplement pump is communicated with the oil outlet of the hydraulic oil tank; the oil outlet of the oil supplement pump is communicated with the oil inlet of the main pump package; the oil return port of the hydraulic oil tank is communicated with the oil return port of the reversing valve bank and the communicated pipeline is provided with a first one-way valve. The oil supplement motor is connected with the oil supplement pump, the oil supplement pump can sufficiently supplement hydraulic oil, and when the hydraulic pipeline is filled with the hydraulic oil, the first one-way valve can generate certain back pressure, the suction capacity of the main pump package is improved and the main pump package is prevented from sucking air and vibrating.

Description

technical field [0001] The invention relates to the technical field of marine engineering cranes, in particular to a hydraulic control system of marine engineering cranes. Background technique [0002] Hoisting mechanisms such as cranes are often used in the engineering equipment of ships and offshore platforms. The hydraulic control system of the crane is very complicated. The rationality of the design of the hydraulic system of the crane directly affects the service life of the relevant components in the hydraulic system. [0003] The hydraulic system of marine engineering cranes generally needs to use a large-flow hydraulic system. When the large-flow hydraulic system is working, it needs to match the volume of the hydraulic oil tank used. This is so that the hydraulic oil in the hydraulic pipeline of the hydraulic system can run smoothly. Due to the very compact space layout of the equipment, the hydraulic oil tank is designed to be relatively small; at the same time, be...

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Problems solved by technology

[0005] In the existing large-flow hydraulic system of marine engineering cranes, the volume of the hydraulic oil tank is generally designed to be small, and the position of the hydraulic oil tank is low, so that the hydraulic oil at the oil suction port of the pump group has a predetermined capacity. Insufficient pressure, when the pump group is running at high speed, it is easy to cause the pump group to not absorb oil smoothly, and it is easy to form negative pressure in the hydraulic pipeline at the oil suction port of the pump group, and it is easy to appear at the oil suction port of the pump group under negative pressure Cavitation and cavitation will greatly reduce the service life of the pump set, and will also cause the entire hydraulic system to vibrate and generate greater noise

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