Oil return control system and control method of a gearbox flushing device

Abstract

The invention discloses an oil return control system for a gear case washing device. The oil return control system comprises the washing device and a control system. The washing device comprises a main oil tank, a washing bed stand, a gravity oil tank and an oil return system. The control system comprises a PLC, a power frequency control loop, a frequency converting control loop and a touch screen. The main oil tank is used for storing oil liquid for system operating. The washing bed stand is used for washing a gear case. The gravity oil tank is used for collecting returned oil. According to the oil return control system and method, the liquid level of the gravity oil tank can be accurately controlled, operating is reliable, and thus good operating of the gear case washing device can be ensured; operating parameters of all sensors of the system are collected through the PLC, man-machine interaction display is conducted through the touch screen, the operating parameters of the system are set, the system is controlled to automatically operate, and it is ensured that oil return of the oil return system is normal and oil overflow is avoided; and meanwhile, chain protection is conductedthrough a liquid level switch of the chain protection, a liquid level transmitter is prevented from losing efficacy, and it is ensured that the gear case washing device is stable in system and operates reliably.

Description

technical field [0001] The invention belongs to the technical field of hydraulic lubrication systems, and in particular relates to an oil return control system and a control method of a washing device for a gearbox of a wind power generator. Background technique [0002] In recent years, with the continuous increase of the single-unit capacity of wind turbines, the original 2MW and 3MW have gradually increased to 5 to 7MW. It has gradually changed from land-based to offshore-type, and the investment time of wind turbines has gradually accumulated. Unit outages caused by box failure or damage occur from time to time, and the resulting direct and indirect losses are also increasing, and the workload of maintenance personnel involved in related work is also on the rise. This has prompted more and more OEMs to put forward higher requirements for wind turbine gearboxes. After the gearbox is produced, it is necessary to circulate the gearbox to remove metal debris, powder, dust p...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, provide an oil return control system and method for a gearbox flushing device, and solve the problem of the gravity oil tank of the gearbox flushing device in the prior art due to the unreliable liquid level transmitter. Frequent start-up of oil spill and oil return pump affects the life of the oil pump motor

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