Control method for achieving starting and stopping of oil pump motor through opening and closing of grab bucket

A technology of oil pump motor and control method, which is applied in the direction of mechanical equipment, servo meter circuit, load suspension components, etc., can solve problems such as internal leakage of the system, increase of hydraulic oil temperature, and damage to seals, so as to prolong the service life and save energy. Electric energy, the effect of controlling hydraulic oil temperature
CN108946486AInactive Publication Date: 2018-12-07CHENGDU XINGRONG RENEWABLE ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGDU XINGRONG RENEWABLE ENERGY CO LTD
Publication Date
2018-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a control method for achieving starting and stopping of an oil pump motor through opening and closing of a grab bucket. The positions of coils of three-position four-way solenoid valve sets for hydraulic system control are connected with time-delay relays in parallel, and outage time-delay contacts of the time-delay relays are connected into a starting-stopping loop of theoil pump motor in series. The starting and stopping of an oil pump are controlled through the opening and closing of the grab bucket. According to the control method, due to the fact that the time-delay relays are additionally arranged, the starting and stopping of the oil pump motor and the opening and closing of the grab bucket are interlocked, and the working time of the oil pump is shortened;and electric energy is saved, the hydraulic oil temperature is controlled, hydraulic system seal is protected, and the service life of hydraulic components is prolonged.
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Description

Technical field

[0001] The invention relates to a grab-type universal bridge crane that realizes the start and stop of an oil pump motor by opening and closing the grab. Background technique

[0002] The grab-type universal bridge crane works through the grab hydraulic system to realize the transfer of materials. The main components of the grab are the grab flap, the oil cylinder, the oil pump, the solenoid valve group and the motor. At present, the general design is to start the oil pump, and control the action of the solenoid valve group by operating the handle to realize the opening and closing of the grab. During the whole working process, the oil pump is always in working condition, and the hydraulic oil overflows through the system and returns to the oil tank when the grab bucket is not open or closed. Description of the main problems: ①The opening and closing time of the grab bucket is in the process interval of grabbing and stacking materials, and the material moving fr...

Claims

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